diff --git a/curriculum/challenges/arabic/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md b/curriculum/challenges/arabic/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
index 17768155a3f..8f03b3f09db 100644
--- a/curriculum/challenges/arabic/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
+++ b/curriculum/challenges/arabic/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
@@ -22,7 +22,8 @@ Complete the function using the rules below to modify the object passed to the f
 -   Your function must always return the entire `records` object.
 -   If `value` is an empty string, delete the given `prop` property from the album.
 -   If `prop` isn't `tracks` and `value` isn't an empty string, assign the `value` to that album's `prop`.
--   If `prop` is `tracks` and `value` isn't an empty string, you need to update the album's `tracks` array. First, if the album does not have a `tracks` property, assign it an empty array. Then add the `value` as the last item in the album's `tracks` array.
+-   If `prop` is `tracks` and `value` isn't an empty string, but the album doesn't have a `tracks` property, create an empty array and add `value` to it.
+-   If prop is `tracks` and `value` isn't an empty string, add `value` to the end of the album's existing `tracks` array.
 
 **Note:** A copy of the `recordCollection` object is used for the tests. You should not directly modify the `recordCollection` object.
 
diff --git a/curriculum/challenges/arabic/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md b/curriculum/challenges/arabic/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
index da9040a8c85..f5d76f3bbc1 100644
--- a/curriculum/challenges/arabic/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
+++ b/curriculum/challenges/arabic/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
@@ -8,7 +8,7 @@ dashedName: serialization-of-a-user-object
 
 # --description--
 
-Serialization and deserialization are important concepts in regards to authentication. To serialize an object means to convert its contents into a small *key* that can then be deserialized into the original object. This is what allows us to know who has communicated with the server without having to send the authentication data, like the username and password, at each request for a new page.
+Serialization and deserialization are important concepts in regard to authentication. To serialize an object means to convert its contents into a small *key* that can then be deserialized into the original object. This is what allows us to know who has communicated with the server without having to send the authentication data, like the username and password, at each request for a new page.
 
 To set this up properly, you need to have a serialize function and a deserialize function. In Passport, these can be created with:
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
index fa124be9f4e..2eb8b43ec70 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
@@ -19,8 +19,8 @@ You should use the `append()` method to append `start` to `paths[start]`.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\.append\s*\(\s*start\s*\)/m));
+    const {function_body} = shortest;
+    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\s*\.append\s*\(\s*start\s*\)/m));
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
index f36ff76e347..731d8da7492 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
@@ -27,8 +27,8 @@ You should call `extend()` on the neighbour node path passing the current node p
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
index c269b8e3c86..3c262f8c1b0 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
@@ -16,8 +16,8 @@ You should append `node` to `paths[node]` just after your `else` statement.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\.append\s*\(\s*node\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\s*\.append\s*\(\s*node\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
index e9a7367bb22..6985e5dfd70 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
@@ -28,7 +28,7 @@ You should print the provided string inside your new `for` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
+    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(\s*f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
index cfdfbf231f1..49bdf2cb1f7 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
@@ -32,7 +32,7 @@ You should create a variable called `targets_to_print` after your `while` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=/ms));
   }
 })
 ```
@@ -43,7 +43,7 @@ You should the ternary syntax to assign `[target]` when `target` is truthy, and
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
index 15338d90709..93a81b046d9 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
@@ -25,7 +25,7 @@ Just before your `print()` call, use the `del` keyword to delete the `age` key a
 You should use the `del` keyword to delete `copper['age']` before the `print()` call.
 
 ```js
-({ test: () => assert.match(code, /^del\s+copper\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
+({ test: () => assert.match(code, /^del\s+copper\s*\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
index cede04598d9..e2a3b2527d9 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
@@ -24,7 +24,7 @@ Create an `__init__` method inside your `Board` class.
 Your method should be named `__init__`. Don't add any parameters.
 
 ```js
-assert.match(code, / +def\s+__init__\s*\(\)\:/);
+assert.match(code, / +def\s+__init__\s*\(\s*\)\:/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
index 31d9ffd6fd6..45f4dc93ff6 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
@@ -43,6 +43,6 @@ class Board:
 --fcc-editable-region--
         for index, line in enumerate(self.board):
           row_list = []
-          
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
index d6b0c39c865..6ca1945c89c 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
@@ -16,7 +16,7 @@ Use list slicing to create the three lists of equal length representing the `lin
 You should have `enumerate([line[:3], line[3:6], line[6:]], start=1)` within the inner `for` loop.
 
 ```js
-assert.match(code, /\[line\[:3\],\s*line\[3:6\],\s*line\[6:\]\]\s*,\s*start\s*=\s*1/);
+assert.match(code, /\[\s*line\s*\[\s*:3\s*\]\s*,\s*line\s*\[\s*3\s*:\s*6\s*\]\s*,\s*line\s*\[\s*6\s*:\s*\]\s*\]\s*,\s*start\s*=\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
index 35e95dc4627..86f6ee034bb 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
@@ -14,13 +14,13 @@ In the `try` block, attempt to find the index of the first occurrence of `0` in
 Use the index of the first occurrence of `0` in the current row using `contents.index(0)`.
 
 ```js
-assert.match(code, /contents\.index\(0\)/)
+assert.match(code, /contents\.index\(\s*0\s*\)/)
 ```
 
 You should have `col = contents.index(0)` within the `try` block.
 
 ```js
-assert.match(code, /col\s*=\s*contents\.index\(0\)/)
+assert.match(code, /col\s*=\s*contents\.index\(\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
index 54a25603769..7d603a4b32f 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
@@ -16,7 +16,7 @@ You should check if the number(`num`) is not present in `self.board[row]`.
 You should have `num not in self.board[row]` within `valid_in_row`.
 
 ```js
-assert.match(code, /num\s+not\s+in\s+self\.board\[row\]/)
+assert.match(code, /num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
index 9a9137a00c5..902004b8c04 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
@@ -21,7 +21,7 @@ You should have `return num not in self.board[row]` within `valid_in_row`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_row");
 const {function_body} = valid;
-assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\[row\]/);
+assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
index 397a6f431a7..b5a91b523e7 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] != num` within `valid_in_col`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /self\.board\[row\]\[col\]\s*!=\s*num/);
+assert.match(function_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
index 79bd839e5de..3911b5f36da 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
@@ -28,7 +28,7 @@ You should have `all(self.board[row][col] != num for row in range(9))` within `v
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /all\s*\(\s*self\.board\[row\]\[col\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
+assert.match(function_body, /all\s*\(\s*self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
index 80d57e06e82..b30a2b63bb4 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
@@ -21,7 +21,7 @@ You should assign the result of `(row // 3) * 3` to `row_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /row_start\s*=\s*\(row\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /row_start\s*=\s*\(\s*row\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
index c069324c97c..cd782ea0d1c 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
@@ -21,7 +21,7 @@ You should assign the result of `(col // 3) * 3` to `col_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /col_start\s*=\s*\(col\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /col_start\s*=\s*\(\s*col\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
index 87d04dbe9bb..ccec106f37e 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
@@ -22,7 +22,7 @@ You should have `next_empty := self.find_empty_cell()` within the `solver` metho
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\)/);
+assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
index 0bcaf803135..119631e5930 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
@@ -16,7 +16,7 @@ You should have `if (next_empty := self.find_empty_cell()) is None:` withing `so
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /if\s*\(next_empty\s*:=\s*self\.find_empty_cell\(\)\)\s*is\s*None:/)
+assert.match(function_body, /if\s*\(\s*next_empty\s*:=\s*self\.find_empty_cell\(\s*\)\s*\)\s*is\s*None:/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
index 00a40c74f0e..777d8e828e5 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
@@ -7,7 +7,7 @@ dashedName: step-64
 
 # --description--
 
-If still there are empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive).
+If there are still empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive). Your loop should use the variable named `guess`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have `for guess in range(1,10):` within the `else` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "else");
-assert.match(block_body, /for\s+\w+\s+in\s+range\(1,\s*10\)/);
+assert.match(block_body, /for\s+\w+\s+in\s+range\(\s*1,\s*10\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
index c6998388073..6e84768b9e3 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] = guess` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*guess/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*guess/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
index 1820b157384..d98033431b9 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
@@ -17,7 +17,7 @@ You should have `self.solver()` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.solver\(\)/);
+assert.match(block_body, /self\.solver\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
index c5a58ac4920..3928aec1803 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
@@ -19,7 +19,7 @@ You should have `if self.solver():` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /if\s+self\.solver\(\):/);
+assert.match(block_body, /if\s+self\.solver\(\s*\):/);
 ```
 
 You should have `return True` within `if self.solver():`.
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
index 67dc94c5876..9f05bd68e30 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
@@ -19,7 +19,7 @@ You should have `self.board[row][col] = 0` outside the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*0/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*0/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
index 79eb771384e..80d05b52712 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
@@ -18,7 +18,7 @@ You should have `gameboard = Board(board)` within the `solve_sudoku` function.
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solve_sudoku");
-assert.match(function_body, /gameboard\s*=\s*Board\(board\)/);
+assert.match(function_body, /gameboard\s*=\s*Board\(\s*board\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
index 18b921ff631..4547fbb10f0 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
@@ -22,7 +22,7 @@ With this, you are finished with building the sudoku solver!
 Call the `solve_sudoku` method with `puzzle` as input.
 
 ```js
-assert.match(code, /solve_sudoku\(puzzle\)/);
+assert.match(code, /solve_sudoku\(\s*puzzle\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
index 478dbd9941c..0fb0d63daf0 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
@@ -37,7 +37,7 @@ You should assign `array[:middle_point]` to the `left_part` variable.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /left_part\s*=\s*array\[:middle_point\]/);
+    assert.match(function_body, /left_part\s*=\s*array\s*\[\s*:\s*middle_point\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
index a3115ff5b3d..7ff0f3c6c63 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
@@ -22,7 +22,7 @@ You should replace `pass` keyword with an `if` statement with this condition: `l
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*pass/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
index 88d10cab519..829f332dada 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
@@ -24,7 +24,7 @@ You should replace `pass` with `array[sorted_index] = left_part[left_array_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*array\[sorted_index\]\s*=\s*left_part\[left_array_index\]\s*(?!.*\bpass\b)/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]\s*(?!.*\bpass\b)/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
index 4b3f08d05dd..05069da468b 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
@@ -24,7 +24,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /else:\s*[^}]*array\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /else:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
index c2dc69a70a1..b7a9ff260b3 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
@@ -24,7 +24,7 @@ Your `while` loop should have this condition: `left_array_index < len(left_part)
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(left_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):/m);
   }
 })
 ```
@@ -38,7 +38,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
index b2635874f1f..95801ce621f 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = left_part[left_array_index]` in the body
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ You should not have `pass` in the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
index 151f550145c..7f37a255776 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `left_array_i
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
index d50325ede29..602b7a1bf44 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
@@ -22,7 +22,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
index 43438c94203..1f4cf34616e 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
@@ -22,7 +22,7 @@ Your `while` loop should have this condition: `right_array_index < len(right_par
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(right_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):/m);
   }
 })
 ```
@@ -36,7 +36,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
index 41811e156d7..057c990b641 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
index 80ce6270252..263c161db40 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
@@ -20,7 +20,7 @@ You should have `right_array_index += 1` within the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bright_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bright_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
index 9bbacf039e3..02f8ece59cd 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
index 4db084d042d..e8531fed130 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
@@ -24,7 +24,7 @@ You should create an `if` statement to check if `len(array) <= 1`. Don't forget
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*pass/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
index d632afe9281..b1cc49ce5e2 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
@@ -20,7 +20,7 @@ You should replace `pass` with a `return` statement in the body of the `if` stat
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*return/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the body of the `if` statement
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
index 7e4dc47acfe..0cd12520d6c 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
@@ -21,8 +21,8 @@ You should add `1` to the current value of `left_array_index`.
     const { function_body } = merge_sort;
 
     const allowedMatches = [
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
     ]
 
     const anyMatch = allowedMatches.some((match) => match.test(function_body));
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
index 033b132b10b..85ea983f951 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
@@ -34,7 +34,7 @@ You should assign `array[middle_point:]` to the `right_part` variable
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /right_part\s*=\s*array\[middle_point:\]/);
+    assert.match(function_body, /right_part\s*=\s*array\s*\[\s*middle_point\s*:\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
index fc8086c4022..0247cd7f8df 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
@@ -7,11 +7,11 @@ dashedName: step-2
 
 # --description--
 
-Replace the `pass` statement with a variable named `card_number` and a value of `4111-1111-4555-1142`.
+Replace the `pass` statement with a variable named `card_number` and a value of `'4111-1111-4555-1142'`.
 
 # --hints--
 
-You should have `card_number = "4111-1111-4555-1142"` within the `main` function.
+You should have `card_number = '4111-1111-4555-1142'` within the `main` function.
 
 ```js
 ({
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
index bfcc9dda13c..c0498ffe1a2 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
@@ -13,7 +13,7 @@ The Luhn algorithm is as follows:
 
 1. From the right to left, double the value of every second digit; if the product is greater than 9, sum the digits of the products.
 2. Take the sum of all the digits.
-3. If the sum of all the digits is a multiple of `10`, then the number is valid; else it is not valid.
+3. If the sum of all the digits is a multiple of 10, then the number is valid; else it is not valid.
 
 Assume an example of an account number "7992739871" that will have a check digit added, making it of the form 7992739871x:
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
index bbf0e0b3803..f3095c1670b 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
@@ -30,7 +30,7 @@ You should have `card_number_reversed = card_number[0:4]` within the `verify_car
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
index 0a22da3ebcd..7ac18aa3dfb 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
@@ -20,7 +20,7 @@ You should have `odd_digits = card_number_reversed[::2]` within the `verify_card
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\[::2\]/);
+        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\s*\[\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
index d4944fe528f..ea87c48c682 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
@@ -27,7 +27,7 @@ You should have `sum_of_odd_digits += int(digit)` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(digit\)/);
+        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(\s*digit\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
index 99106f4e540..f768be57a2d 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
@@ -20,7 +20,7 @@ You should have `even_digits = card_number_reversed[1::2]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\[1::2\]/);
+        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\s*\[\s*1\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
index ac03d76cec7..e68412552e7 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
@@ -22,7 +22,7 @@ You should have `number = int(digit) * 2` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /number\s*=\s*int\(digit\)\s*\*\s*2/);
+        assert.match(function_body, /number\s*=\s*int\(\s*digit\s*\)\s*\*\s*2/);
     }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
index 14d051c1336..a57e23f8eec 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
@@ -30,8 +30,8 @@ You should have `number = number // 10 + number % 10` within the `if` statement.
         const verify_card_number = __helpers.python.getBlock("\n" + transformedCode, "if number >= 10");
         const { block_body } = verify_card_number;
         const allowedMatches = [
-            /number *= *\(?number *\/\/ *10\)? *\+ *\(?number *% *10/,
-            /number *= *\(?number *% *10\)? *\+ *\(?number *\/\/ *10/
+            /number *= *\(?\s*number *\/\/ *10\s*\)? *\+ *\(?\s*number *% *10/,
+            /number *= *\(?\s*number *% *10\s*\)? *\+ *\(?\s*number *\/\/ *10/
         ];
 
         const someMatch = allowedMatches.some(allowedMatch => allowedMatch.test(block_body));
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
index e17792dd3bc..06d4c49c3a7 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
@@ -7,7 +7,7 @@ dashedName: step-33
 
 # --description--
 
-Adjust the `verify_card_number` call such that if it returns `True`, print `VALID!` to the console. Otherwise, print `INVALID!`.
+Adjust the `verify_card_number` call such that if it returns `True`, print `'VALID!'` to the console. Otherwise, print `'INVALID!'`.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `if verify_card_number(translated_card_number):` within the `mai
 })
 ```
 
-You should have `print("VALID!")` within the `if` statement.
+You should have `print('VALID!')` within the `if` statement.
 
 ```js
 ({
@@ -40,7 +40,7 @@ You should have `print("VALID!")` within the `if` statement.
 })
 ```
 
-You should have `print("INVALID!")` within the `else` clause.
+You should have `print('INVALID!')` within the `else` clause.
 
 ```js
 ({
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
index 945e719bff8..04c76315508 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
@@ -7,7 +7,7 @@ dashedName: step-34
 
 # --description--
 
-Change the value of `card_number` such that `INVALID!` is printed to the console.
+Change the value of `card_number` such that `'INVALID!'` is printed to the console.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
index 4efc683ac39..62247b056f7 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
@@ -20,7 +20,7 @@ You should have `card_number_reversed = card_number[0:4:2]` within the `verify_c
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4:2\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
index 603ec274675..870a14c91b5 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
@@ -27,7 +27,7 @@ You should have `card_number_reversed = card_number[::-1]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[::-1\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*:\s*:\s*-1\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
index 800d8b1f84b..d50879db3a5 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
@@ -10,10 +10,10 @@ dashedName: step-4
 A dictionary is another built-in data type in Python. A dictionary is a collection of data in the form of *key*-*value* pairs. Dictionaries are defined with curly braces `{}` and they contain key-value pairs separated by commas. Each key is followed by a colon `:` and the value:
 
 ```py
-{"amount": 50.0, "category": "Food"}
+{'amount': 50.0, 'category': 'Food'}
 ```
 
-In the example above, `amount` and `category` are keys, and `50.0` and `Food` are their the corresponding values.
+In the example above, `amount` and `category` are keys, and `50.0` and `'Food'` are their the corresponding values.
 
 Create a dictionary with a key `amount` and value of the `amount` parameter and pass your new dictionary to the `.append()` call.
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
index f3a900f13ea..9c927745b89 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `category` as the key, and the `category` parameter as the value.
+Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `'category'` as the key, and the `category` parameter as the value.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
index d7ade5dcd59..d8d50f45262 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
@@ -10,11 +10,11 @@ dashedName: step-9
 You can access values in a dictionary through its keys. You need to use the bracket notation and include the key between the square brackets:
 
 ```py
-my_dict = {"amount": 50.0, "category": "Food"}
-my_dict["amount"] # 50.0
+my_dict = {'amount': 50.0, 'category': 'Food'}
+my_dict['amount'] # 50.0
 ```
 
-You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `amount` key and the `category` key in the `expense` dictionary.
+You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `'amount'` key and the `'category'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
index d926a3ee6eb..1dda12ed7e7 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
@@ -13,7 +13,7 @@ Lambda functions are brief, anonymous functions in Python, ideal for simple, one
 lambda x: expr
 ```
 
-In the example above, `x` is a parameter to be use in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
+In the example above, `x` is a parameter to be used in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
index 5b0bc45e859..c9de5f0fb91 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `amount` key in the `expense` dictionary.
+Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `'amount'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
index 72916bfda0b..b1dc2eadedb 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `category` key of the `expense` dictionary and `category`.
+Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `'category'` key of the `expense` dictionary and `category`.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
index a70b6f63c6f..af59c1df946 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
@@ -23,7 +23,7 @@ You should define a function named `main()` without parameters.
 })
 ```
 
-You should move the `expense` list inside the `main()` function body.
+You should move the `expenses` list inside the `main()` function body.
 
 ```js
 ({ test: () => assert(__pyodide.runPython(`
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
index 9debd53a795..fd4eb09a765 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
@@ -14,7 +14,7 @@ while condition:
     <code>
 ```
 
-Below the `expense` list, create a `while` loop. Use `True` for the condition, and print the string `\nExpense Tracker` inside the loop body to show the title of the program.
+Below the `expenses` list, create a `while` loop. Use `True` for the condition, and print the string `'\nExpense Tracker'` inside the loop body to show the title of the program.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
index 3bf6343d3e3..3063be12946 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
@@ -9,7 +9,7 @@ dashedName: step-25
 
 The `while` loop you created in the previous step is an infinite loop that will allow the program to continuously present menu options until the user decides to exit.
 
-After the `print()` call, add another one to print the string `1. Add an expense`.
+After the `print()` call, add another one to print the string `'1. Add an expense'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
index 5643a99858f..f5755ec145f 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
@@ -7,7 +7,7 @@ dashedName: step-26
 
 # --description--
 
-Next, add another `print()` call and pass the string `2. List all expenses`.
+Next, add another `print()` call and pass the string `'2. List all expenses'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
index 423bb01d257..a3b2b63db30 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
@@ -7,7 +7,7 @@ dashedName: step-27
 
 # --description--
 
-Provide the other menu options by printing the following three strings in your `while` loop: `3. Show total expenses`, `4. Filter expenses by category`, and `5. Exit`.
+Provide the other menu options by printing the following three strings in your `while` loop: `'3. Show total expenses'`, `'4. Filter expenses by category'`, and `'5. Exit'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
index 2160e868f84..5c4d86143c6 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
@@ -9,7 +9,7 @@ dashedName: step-28
 
 The `input()` function takes a user input and it returns the user input in the form of a string.
 
-Inside your `while` loop, call the `input()` function passing the string `Enter your choice:` as the argument, and assign the result to a variable named `choice`.
+Inside your `while` loop, call the `input()` function passing the string `'Enter your choice: '` as the argument, and assign the result to a variable named `choice`.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
index 7399b06040a..2d01bb17ff3 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
@@ -7,9 +7,9 @@ dashedName: step-29
 
 # --description--
 
-You are going to use conditional statements to check the user's choice. If the choice is `1`, it means the user wants to add an expense.
+You are going to use conditional statements to check the user's choice. If the choice is `'1'`, it means the user wants to add an expense.
 
-Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `1`. If it's true, it will be the starting point for adding a new expense.
+Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `'1'`. If it's true, it will be the starting point for adding a new expense.
 
 Inside the `if` statement body, declare a variable `amount` and assign it an empty `input()` call.
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
index 3f467fc9249..feab4cdb500 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
@@ -9,7 +9,7 @@ dashedName: step-30
 
 Inside the `if` statement, you should ask the user to enter the amount for the expense and store it in a variable.
 
-Pass the string `Enter amount:` to your empty `input()` call, so you can store the expense.
+Pass the string `'Enter amount: '` to your empty `input()` call, so you can store the expense.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
index 4c0c1333551..f64885b8a82 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
@@ -9,7 +9,7 @@ dashedName: step-34
 
 To list all expenses, you can use an `elif` statement after an `if` statement. The `elif` checks additional conditions and only works following an `if` statement.
 
-Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `\nAll Expenses:`.
+Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `'\nAll Expenses:'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
index 9064e28619f..49fa901315f 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
@@ -9,7 +9,7 @@ dashedName: step-36
 
 To show the total expenses, create an `elif` statement that checks if `choice == '3'`.
 
-If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `\nTotal Expenses:` as the first argument and `total_expenses(expenses)` as the second argument.
+If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `'\nTotal Expenses: '` as the first argument and `total_expenses(expenses)` as the second argument.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
index e2d2845b70d..dd8e1bdd00d 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
@@ -7,9 +7,9 @@ dashedName: step-41
 
 # --description--
 
-To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `5`.
+To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `'5'`.
 
-Inside the new `elif` statement, print the string `Exiting the program.` to show that the program is terminating its execution.
+Inside the new `elif` statement, print the string `'Exiting the program.'` to show that the program is terminating its execution.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `elif choice == '5':` in your code.
 })
 ```
 
-You should print `Exiting the program.` in your new `elif` statement.
+You should print `'Exiting the program.'` in your new `elif` statement.
 
 ```js
 ({ test: () =>
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
index 42c507cd04d..de008a960b3 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
@@ -22,7 +22,7 @@ You should replace `pass` with an empty list named `snake_cased_char_list` withi
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\]/);
+        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\s*\]\s*/);
     }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
index a475768fa3b..486eee76f6e 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
@@ -34,7 +34,7 @@ You should use the `.append()` method to add `char` to the `snake_cased_char_lis
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list.append\(char\)/);
+        assert.match(function_body, / +snake_cased_char_list.append\(\s*char\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
index 6feb1bfb4e3..63d15eda8f4 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
@@ -7,11 +7,11 @@ dashedName: step-12
 
 # --description--
 
-Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `aLongAndComplexString` as input to the function and print out the output using the `print()` function.
+Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `'aLongAndComplexString'` as input to the function and print out the output using the `print()` function.
 
 # --hints--
 
-You should call `convert_to_snake_case()` inside the `main()` function and pass `aLongAndComplexString` as input to the function.
+You should call `convert_to_snake_case()` inside the `main()` function and pass `'aLongAndComplexString'` as input to the function.
 
 ```js
 ({
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
index 7a14f22c4d2..9619247c586 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
@@ -7,7 +7,7 @@ dashedName: step-22
 
 # --description--
 
-Finally try out this new implementation by executing the program. Change the input string to `IAmAPascalCasedString` and see if it comes out as `i_am_a_pascal_cased_string`, even though that's a lie.
+Finally try out this new implementation by executing the program. Change the input string to `'IAmAPascalCasedString'` and see if it comes out as `'i_am_a_pascal_cased_string'`, even though that's a lie.
 
 If you've done everything correctly, you should see the input string converted into snake case, like before.
 
@@ -15,7 +15,7 @@ Congratulations! Now your `convert_to_snake_case()` function is ready.
 
 # --hints--
 
-You should change the input string from `aLongAndComplexString` to `IAmAPascalCasedString` inside the `main()` function.
+You should change the input string from `'aLongAndComplexString'` to `'IAmAPascalCasedString'` inside the `main()` function.
 
 ```js
 ({
@@ -24,7 +24,7 @@ You should change the input string from `aLongAndComplexString` to `IAmAPascalCa
         const main = __helpers.python.getDef("\n" + transformedCode, "main");
         const { function_body } = main;
 
-        assert.match(function_body, / +print\(convert_to_snake_case\('IAmAPascalCasedString'\)\)/);
+        assert.match(function_body, / +print\(\s*convert_to_snake_case\(\s*'IAmAPascalCasedString'\s*\)\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
index cace50fe3d3..bccd26c6936 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
@@ -7,9 +7,9 @@ dashedName: step-3
 
 # --description--
 
-The puzzle starts with the disks piled up on the first rod, in decreasing size. You need to populate your first list with numbers representing the various disk sizes.
+The puzzle starts with the disks piled up on the first rod, in decreasing size, with the smallest disk on top and the largest disk on the bottom. You need to populate your first list with numbers representing the various disk sizes.
 
-Instead of adding the items manually to the first list, generate a sequence of numbers from `3` to `1` by using the `range()` function and assign it to `rods['A']`.
+Instead of adding the items manually to the first list, generate a sequence of numbers counting down from `3` to `1` by using the `range()` function and assign it to `rods['A']`. Here, `3` represents the largest disk at the bottom of the pile and `1` represents the smallest disk at the top of the pile.
 
 The syntax is `range(x, y, h)`, where `x` is the starting integer (inclusive), `y` is the last integer (not inclusive), and `h` is the difference between a number and the next one in the sequence.
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
index bc389858a42..cef0d428114 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
@@ -14,13 +14,13 @@ Now check the data type of your `'A'` key by passing it to the `type()` function
 You should pass your `'A'` key to the `type()` function.
 
 ```js
-({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)/) })
+({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)/) })
 ```
 
 You should print the type of `rods['A']` using the `print()` function.
 
 ```js
-({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)\s*\)/) })
+({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
index f05fdf44bb0..edcf8ed1041 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
@@ -14,7 +14,7 @@ Now that the type is `list` as required, you can remove the `print()` call.
 You should remove `print(type(rods['A']))` from your code.
 
 ```js
-({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
+({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
index 7db01abecf6..a1e0800c199 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
@@ -9,7 +9,7 @@ dashedName: step-16
 
 At the end of this project, you will create a recursive solution to the Tower of Hanoi puzzle, but now you are going to explore an iterative approach to this problem.
 
-Start by adding a `for` loop to your function that iterates through the number of moves and prints the current iteration number.
+Start by adding a `for` loop to your function that iterates through the `number_of_moves` and prints the current iteration number.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
index ca7a4565898..7c58832e32b 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `A` and `B` (the source and the auxiliary rods).
+When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `'A'` and `'B'` (the source and the auxiliary rods).
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
index 3f60ba9c14c..5e51e76b75e 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
@@ -7,7 +7,7 @@ dashedName: step-21
 
 # --description--
 
-Finally, when the move number divided by 3 has no remainder, the movement is allowed between `B` and `C`.
+Finally, when the move number divided by 3 has no remainder, the movement is allowed between `'B'` and `'C'`.
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
index c43eccad7ba..3dc116210bf 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
@@ -18,10 +18,10 @@ You should have an `elif` statement to check if `rods[source]` is not empty and
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:`);
 assert.match(code, re);
 ```
 
@@ -30,10 +30,10 @@ You should set `forward` to `True` inside your new `elif` statement. You should
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
 assert.match(code, re);
 ```
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
index 738edf908da..c06ea4f037c 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
@@ -20,7 +20,7 @@ You should add an `if` statement to execute when `forward` is `True` after the `
 You should print the provide string inside your new `if` statement.
 
 ```js
-({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
+({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
index 4d92e5c27c1..c1c5273e34a 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
@@ -14,13 +14,13 @@ After printing the move, you need to remove the last element from the source rod
 You should remove the last element from `rods[source]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[target].append(rods[source].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
index 71b0a51a80e..b503c73ee44 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
@@ -14,25 +14,25 @@ When `forward` is `False`, the disk has to be moved in the opposite direction. W
 You should have an `else` clause to move the disks in the opposite direction.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
 ```
 
 You should have `print(f'Moving disk {rods[target][-1]} from {target} to {source}')` inside your `else` clause.
 
 ```js
-({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
+({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
 ```
 
 You should remove the last element from `rods[target]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[source].append(rods[target].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
index ca3b3d1769a..9a70c4951a3 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
@@ -14,13 +14,13 @@ Outside the `else` block, add a comment saying `display our progress` and print
 You should use the provided text to add a comment outside the `else` block.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
 ```
 
 You should print the `rods` object outside the `else` block, after the comment.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
index 535052128ab..990026a4435 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
@@ -15,7 +15,7 @@ You should move the code nested inside the first `if` statement (except the firs
 
 ```js
 ({ test: () => {
-  assert.match(code, /def\s+make_allowed_move\(rod1, rod2\):\s+forward\s+=\s+False\s+if\s+not\s+rods\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\[\s*source\s*\]\s+and\s+rods\[\s*source\s*\]\[-1\]\s<\srods\[\s*target\s*\]\[\s*-\s*1\s*\]:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\[\s*source\s*\].append\(\s*rods\[\s*target\s*\].pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+\print\(\s*rods\s*\)/);
+  assert.match(code, /def\s+make_allowed_move\(\s*rod1, rod2\s*\):\s+forward\s+=\s+False\s+if\s+not\s+rods\s*\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\s*\[\s*source\s*\]\s+and\s+rods\s*\[\s*source\s*\]\s*\[\s*-1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\s*\[\s*source\s*\]\s*\.append\(\s*rods\s*\[\s*target\s*\]\s*\.pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\(\s*rods\s*\)/);
   }
 })
 ```
@@ -47,7 +47,7 @@ def move(n, source, auxiliary, target):
             if not rods[target]:
                 forward = True
             elif rods[source] and rods[source][-1] < rods[target][-1]:
-                forward = True              
+                forward = True
             if forward:
                 print(f'Moving disk {rods[source][-1]} from {source} to {target}')
                 rods[target].append(rods[source].pop())
@@ -57,7 +57,7 @@ def move(n, source, auxiliary, target):
 
             # display our progress
             print(rods)
---fcc-editable-region--            
+--fcc-editable-region--
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
         elif remainder == 0:
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
index 1c68f81babd..c72e5a00eb7 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
@@ -15,11 +15,11 @@ You should change each occurrence of `source` inside the `make_allowed_move()` f
 
 ```js
 ({ test: () => {
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
index 96c8877a173..60ea77c257c 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
@@ -16,11 +16,11 @@ You should change each occurrence of `target` inside `make_allowed_move` into `r
 ```js
 ({ test: () => {
   assert.match(code, /if\s+not\s+rods\s*\[\s*rod2\s*\]\s*:/);
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\[\s*rod2\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*rod2\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\s*\[\s*rod2\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod2\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
index 632c83ccfc0..2ad423d2976 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
@@ -11,7 +11,7 @@ It looks like it's working! But the output is not very readable. Print a new lin
 
 # --hints--
 
-You should pass a string with a new line character (`\n`) as the second argument for your two `print(rods)` calls.
+You should pass a string with a new line character (`'\n'`) as the second argument for your two `print(rods)` calls.
 
 ```js
 ({ test: () => assert.match(code, /print\(\s*rods\s*,\s*('|")\\n\1\s*\)(?=.*print\(\s*rods\s*,\s*('|")\\n\2\s*\))/s) })
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
index 4c17714071d..f7b43c86607 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
@@ -16,7 +16,7 @@ For now, each recursive call prints the `rods` dictionary without performing any
 You should remove the last element from the `rods[source]` list and append it to the `rods[target]` list before the `print` call.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
index b8d215d41b4..f121fb8f397 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
@@ -14,7 +14,7 @@ Before appending the last element to the target, add a comment saying `move the
 You should add a comment with the provided text before `rods[target].append(rods[source].pop())`.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\))/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
index 240e7ac577c..59daf5cb065 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Although recursion could sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
+Although recursion can sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
 
 Set `NUMBER_OF_DISKS` to `5` and check the output.
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
index a25aabcb054..8331f7752cc 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
@@ -21,7 +21,7 @@ You should delete the last three lines in your code.
 ({ test: () => {
   assert.isFalse(/pattern\s*=\s*r("|')\\W\1/.test(code));
   assert.isFalse(/quote\s*=\s*("|')_\1/.test(code));
-  assert.isFalse(/print\(re\.findall\(pattern, quote\)\)/.test(code));
+  assert.isFalse(/print\(\s*re\.findall\(\s*pattern, quote\s*\)\s*\)/.test(code));
 }})
 ```
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
index 911f2a1d783..229527026e7 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
@@ -14,7 +14,7 @@ Now, turn the empty string in the constraint tuple into a regex pattern to match
 You should have the `(nums, '[0123456789]')` tuple in your `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
+({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
index 4915dcf1c47..78875659de9 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
@@ -27,7 +27,7 @@ You should replace your existing `for` loop and two `if` statements with a singl
 Your new `if` condition should be a list comprehension that is the result of evaluating the expression `constraint <= len(re.findall(pattern, password))` for each `constraint`-`pattern` tuple in the `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /^(\s{8})if\s+\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
+({ test: () => assert.match(code, /^(\s{8})if\s*\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
index 5a7a8e606dd..e9cd64b4668 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
@@ -1,6 +1,6 @@
 ---
 id: 6551ecf597038c36637f3759
-title: Step 1
+title: الخطوة 1
 challengeType: 20
 dashedName: step-1
 ---
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
index 2e6d119b78b..9ac8e63bad6 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
@@ -1,6 +1,6 @@
 ---
 id: 6551eebe6cbb2e6cadf9b468
-title: Step 2
+title: الخطوة 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -15,7 +15,7 @@ string_2 = 'I am also a string'
 string_3 = 'This is not valid"
 ```
 
-Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `Hello World` to this variable.
+Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `'Hello World'` to this variable.
 
 # --hints--
 
@@ -32,7 +32,7 @@ You should declare a variable called `text`. Pay attention to place the variable
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello World` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
+You should assign the string `'Hello World'` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello World\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
index d40877ed6af..2b65b4b4212 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
@@ -14,7 +14,7 @@ greet = 'Hello!'
 print(greet)
 ```
 
-The code in the example above would print the string `Hello!`, which is the value of the variable `greet` passed to `print()` as the argument.
+The code in the example above would print the string `'Hello!'`, which is the value of the variable `greet` passed to `print()` as the argument.
 
 Print your `text` variable to the screen by passing the `text` variable as the argument to the `print()` function.
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
index 86104aff4f6..7c28d74b6b7 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `Hello World`, `H` is at index `0`, `e` is at index `1`, and so on. 
+Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `'Hello World'`, `'H'` is at index `0`, `'e'` is at index `1`, and so on.
 
 Each character of a string can be accessed by using bracket notation. You need to write the variable name followed by square brackets and add the index of the character between the brackets:
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
index 5d0ae1dd2fa..3103cb653bf 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-You can see `11` printed on the terminal because `Hello World` contains 11 characters.
+You can see `11` printed on the terminal because `'Hello World'` contains 11 characters.
 
 Another useful built-in function is `type()`, which returns the data type of a variable. Modify your `print()` call to print the data type of `text`.
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
index cedb112a823..074c15b2e19 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
@@ -14,7 +14,7 @@ Key aspects of variable naming in Python are:
 - Variable names are case sensitive, i.e. `my_var` is different from `my_Var` and `MY_VAR`.
 - Finally, it is a common convention to write variable names using `snake_case`, where each space is replaced by an underscore character and the words are written in lowercase letters.
 
-Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `abcdefghijklmnopqrstuvwxyz` to this variable.
+Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `'abcdefghijklmnopqrstuvwxyz'` to this variable.
 
 # --hints--
 
@@ -38,7 +38,7 @@ You should declare a variable called `alphabet`. Pay attention to place the vari
 assert.match(code, /^alphabet\s*=/m)
 ```
 
-You should assign the string `abcdefghijklmnopqrstuvwxyz` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
+You should assign the string `'abcdefghijklmnopqrstuvwxyz'` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
 
 ```js
 assert.match(code, /^alphabet\s*=\s*("|')abcdefghijklmnopqrstuvwxyz\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
index abe8ced263d..5c272b6d6f1 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
@@ -15,7 +15,7 @@ Start by finding the position of the first letter in the string. One way is to c
 text.find('W')
 ```
 
-Above, uppercase `W` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `W` character inside the string stored in the `text` variable.
+Above, uppercase `'W'` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `'W'` character inside the string stored in the `text` variable.
 
 At the end of your code, call `.find()` on your `alphabet` string and pass `text[0]` to the method. Note that a method is just a function that belongs to an object (you will learn more about that in another project).
 
@@ -36,7 +36,7 @@ assert.match(code, /alphabet\.find\s*\(.*\)/)
 You should call the `.find()` method on the `alphabet` variable and pass `text[0]` to the method. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)/m)
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 412619ccc4c..3e3af82109c 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -22,7 +22,7 @@ assert.match(code, /^index\s*=/m)
 You should assign the value returned by `alphabet.find(text[0])` to your `index` variable.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 34166fe3da4..83feddb9318 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `H`, is not found, since `alphabet` contains only lowercase letters.
+`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `'H'`, is not found, since `alphabet` contains only lowercase letters.
 
 You can transform a string into its lowercase equivalent with the `.lower()` method. Add another `print()` call to print `text.lower()` and see the output.
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index 54d47cf3f49..9a554ddeef1 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -27,7 +27,7 @@ assert.match(code, /^print\s*\(\s*index\s*\)/m);
 You should update your `alphabet.find(text[0])` call to use `text[0].lower()` as the argument. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index 95e2567fa84..e4c0036ebff 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-As you can see from the output, `h` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
+As you can see from the output, `'h'` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
 
 Modify your `shifted` variable so that it stores the value of `alphabet` at index `index + shift`.
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index 41811515713..a8da79ffd22 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -35,14 +35,14 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i/m)
 ```
 
-You should write the `in` keyword after `for i `. Make sure to leave a space around the `in` keyword.
+You should write the `in` keyword after `for i`. Make sure to leave a space around the `in` keyword.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i\s+in\s+/m)
 ```
 
-You should write `text` after `for i in `. Don't forget to add the final `:`.
+You should write `text` after `for i in`. Don't forget to add the final `:`.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index b7051de41c3..bdf47ed7c6f 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -7,7 +7,7 @@ dashedName: step-42
 
 # --description--
 
-Currently, spaces get encrypted as `c`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
+Currently, spaces get encrypted as `'c'`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
 
 ```py
 if x != 0:
@@ -16,7 +16,7 @@ if x != 0:
 
 In the example above, the condition of the `if` statement is `x != 0`. The code `print(x)`, inside the `if` statement body, runs only when the condition evaluates to `True` (in this example, meaning that `x` is different from zero).
 
-At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `space!`. Remember to indent this line.
+At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `'space!'`. Remember to indent this line.
 
 # --hints--
 
@@ -36,7 +36,7 @@ const {block_body} = __helpers.python.getBlock(commentless_code, /for\s+char\s+i
 assert(block_body.match(/if\s+char\s*==\s*("|')\s\1\s*:/));
 ```
 
-You should print the string `space!` inside your new `if` statement.
+You should print the string `'space!'` inside your new `if` statement.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index 69191130521..f3fc108e506 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, instead of printing `space!`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
+Now, instead of printing `'space!'`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index dfc91239b0e..f6ea23b4325 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Try to assign the string `Hello Zaira` to your `text` variable and see what happens in the console.
+Try to assign the string `'Hello Zaira'` to your `text` variable and see what happens in the console.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have a `text` variable.
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello Zaira` to your `text` variable.
+You should assign the string `'Hello Zaira'` to your `text` variable.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello\sZaira\1/m)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index 5629c8d00fb..b5f4088d3b7 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -7,7 +7,7 @@ dashedName: step-58
 
 # --description--
 
-Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `python` to this variable.
+Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `'python'` to this variable.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should declare a variable called `custom_key`.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should assign the string `python` to your `custom_key` variable.
+You should assign the string `'python'` to your `custom_key` variable.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "python") })
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 179f7313a5d..47211f5e8bc 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -7,8 +7,7 @@ dashedName: step-59
 
 # --description--
 
-Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text.
-At the beginning of your function body, declare a `key_index` variable and set it to zero.
+Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text. At the beginning of your function body, declare a `key_index` variable and set it to zero.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 660fb4ab263..7e452e05438 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
 
     for char in message.lower():
 --fcc-editable-region--
-        
+
         if char == ' ':
             encrypted_text += char
 --fcc-editable-region--            
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7727f6c57a8..7ca155b0c73 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -7,8 +7,7 @@ dashedName: step-62
 
 # --description--
 
-You will need to increase the `key_index` count for the next iteration.
-To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
+You will need to increase the `key_index` count for the next iteration. To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index 67567e88cdf..a6cd4a9a348 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
         if char == ' ':
             encrypted_text += char
         else:
-            
+
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index da202c1490a..7ca3ec197c0 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -50,7 +50,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key):
             # Find the right key character to encode
             key_char = key[key_index % len(key)]
             key_index += 1
-            
+
 --fcc-editable-region--            
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index 7ca7c2f323a..f783cbf3472 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -32,7 +32,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -41,7 +41,7 @@ def vigenere(message, key):
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
-            
+
             offset = alphabet.index(key_char)
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index a371865b1ef..28c793c06c3 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -55,7 +55,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index 60289b5525e..acf5b0f71c8 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -43,7 +43,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -57,7 +57,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index b1f7c3a5caa..87f8a5aa7f3 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -31,7 +31,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 534ff69ec91..84f3a8477e1 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -46,7 +46,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -60,9 +60,9 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 --fcc-editable-region--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index 3dfdd998a92..d29b009f3cf 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -47,9 +47,9 @@ def vigenere(message, key, direction):
             new_index = (index + offset) % len(alphabet)
 --fcc-editable-region--
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 #encryption = vigenere(text, custom_key)
 #print(encryption)
 ```
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 330871bc52a..9f1ea94390c 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,9 +45,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 --fcc-editable-region--
 #encryption = vigenere(text, custom_key)
 #print(encryption)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index db2c5bdfe33..adf869e6b5f 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index b4b329858a2..8e744b4c09f 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index f49b76f417f..cd7e9ce3a58 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -39,7 +39,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -53,7 +53,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index b295655e5c6..a6ecf2194d0 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -38,7 +38,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -52,9 +52,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index 521f1f961d3..d77bcd5d985 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -19,7 +19,7 @@ You should have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should be equal to the string `Hello Zaira!`.
+Your `text` variable should be equal to the string `'Hello Zaira!'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "Hello Zaira!") })
@@ -40,7 +40,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -54,9 +54,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index f9dfeed2c7d..a60afdc14cc 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -53,9 +53,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index fa8531f3421..40bfdb53982 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -48,9 +48,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index aba2d5665d2..822b22f2743 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -46,9 +46,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index a8a4a146373..82df5c7e409 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -70,7 +70,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index 900a42440bf..ceda0450cc8 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -51,7 +51,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index b37f689c14a..c0d946a1d38 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index d863b1b5667..e86470c6c34 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -51,15 +51,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index e7e001fd7b2..cb2c9d5e191 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -9,7 +9,7 @@ dashedName: step-86
 
 It works! Now, you are going to start with an encrypted message to be decrypted.
 
-Change the value of `text` to the string `mrttaqrhknsw ih puggrur`.
+Change the value of `text` to the string `'mrttaqrhknsw ih puggrur'`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should still have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should have the value of `mrttaqrhknsw ih puggrur`.
+Your `text` variable should have the value of `'mrttaqrhknsw ih puggrur'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "mrttaqrhknsw ih puggrur") })
@@ -54,15 +54,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = encrypt(text, custom_key)
 print(encryption)
 decryption = decrypt(encryption, custom_key)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index 7295239a2e5..a2e43552133 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -46,7 +46,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -60,9 +60,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 582c138e1b3..3cfffa05b63 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index 43650a129a7..b809b6cc227 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -9,11 +9,11 @@ dashedName: step-88
 
 Two or more strings can be concatenated by using the `+` operator. For example: `'Hello' + ' there!'` results in `'Hello there!`.
 
-Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `Encrypted text: `. Pay attention to the spacing.
+Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `'Encrypted text: '`. Pay attention to the spacing.
 
 # --hints--
 
-You should call `print()` and pass `'Encrypted text: ' + text` as the arguments. 
+You should call `print()` and pass `'Encrypted text: ' + text` as the arguments.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--    
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index 68b96128144..bb3bf128cf9 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -7,11 +7,11 @@ dashedName: step-89
 
 # --description--
 
-Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 # --hints--
 
-You should have a `print()` call that prints `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+You should have a `print()` call that prints `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -52,12 +52,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index e52496dd150..6d5c9a3c856 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -7,7 +7,7 @@ dashedName: step-90
 
 # --description--
 
-In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings. 
+In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings.
 
 Interpolation means writing placeholders that will be replaced by the specified values when the program runs. For example, you can get the same result of `'Encrypted text: ' + text` with `f'Encrypted text: {text}'`. You need to put an `f` before the quotes to create the f-string and write the variables or expressions you want to interpolate between curly braces.
 
@@ -49,12 +49,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index ebdb8b79456..4e28d4737fc 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index 8e107b0fff4..d55577ba1cf 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -47,12 +47,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 0f916bf649e..073dfdcd2bb 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -50,12 +50,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 23af806c5ce..006a04850ea 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -7,7 +7,7 @@ dashedName: step-95
 
 # --description--
 
-Wait a minute! You cannot decrypt anything with the wrong key. Try with `happycoding`.
+Wait a minute! You cannot decrypt anything with the wrong key. Try with `'happycoding'`.
 
 With that, your cipher project is complete.
 
@@ -19,7 +19,7 @@ You should still have a `custom_key` variable.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should modify the `custom_key` value into `happycoding`.
+You should modify the `custom_key` value into `'happycoding'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "happycoding") })
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
@@ -96,12 +96,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 05c44517e6f..9a4c27f1945 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -7,8 +7,7 @@ dashedName: step-41
 
 # --description--
 
-Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare.
-They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
+Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare. They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
 
 Python has the following comparison operators:
 
@@ -47,11 +46,11 @@ Python has the following comparison operators:
   </tbody>
 </table>
 
-At the beginning of your loop body, print the result of comparing `char` with an empty space (`' '`). Use the equality operator `==` for that.
+At the beginning of your loop body, print the result of comparing `char` with a space (`' '`). Use the equality operator `==` for that.
 
 # --hints--
 
-You should compare `char` with an empty space using the equality operator inside your `for` loop.
+You should compare `char` with a space using the equality operator inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -62,7 +61,7 @@ You should compare `char` with an empty space using the equality operator inside
 })
 ```
 
-You should print the result of comparing `char` with an empty space inside your `for` loop.
+You should print the result of comparing `char` with a space inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -73,7 +72,7 @@ You should print the result of comparing `char` with an empty space inside your
 })
 ```
 
-You should print the result of comparing `char` with an empty space at the beginning of your loop.
+You should print the result of comparing `char` with a space at the beginning of your loop.
 
 ```js
 ({ test: () => {
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 34e53a7cc4f..86a5a8baa9a 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -18,7 +18,7 @@ Give your `for` loop a body by adding a call to `print(i)`. Remember to indent t
 
 # --hints--
 
-You should add `print(i)` to your `for` loop body. Pay attention to the indentation. 
+You should add `print(i)` to your `for` loop body. Pay attention to the indentation.
 
 ```js
 assert.match(code, /^for\s+i\s+in\s+text:\s+print\s*\(\s*i\s*\)/m)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index e7886b5f796..042349ee0a4 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -15,7 +15,7 @@ Restore the indentation for your `print(i)` call.
 
 # --hints--
 
-You should indent `print(i)` inside your `for` loop body. 
+You should indent `print(i)` inside your `for` loop body.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index 6215b77a724..f971dfe2276 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -13,7 +13,7 @@ Rename your `i` variable to `char`.
 
 # --hints--
 
-You should replace `i` with `char`. 
+You should replace `i` with `char`.
 
 ```js
 assert.match(code, /^for\s+char\s+in\s+text:\s+print\s*\(\s*char\s*\)/m)
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index b2203350e08..97fee73da43 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -7,7 +7,7 @@ dashedName: step-31
 
 # --description--
 
-Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `train`, but this is not valid:
+Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `'train'`, but this is not valid:
 
 ```py
 my_string = 'brain'
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index 39784236282..e2b04ef618e 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -14,7 +14,7 @@ message = 'Hello World'
 message = 'Hello there!'
 ```
 
-Delete the `text[0]` line and reassign `text` the string `Albatross`.
+Delete the `text[0]` line and reassign `text` the string `'Albatross'`.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*\[\s*0\s*\]\s*\=\s*("|')\w\1/.test(commentless_code));
 ```
 
-You should reassign `text` the string `Albatross`. Do not modify `text = 'Hello World'`.
+You should reassign `text` the string `'Albatross'`. Do not modify `text = 'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 076a71f8786..6b04513e34d 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -20,7 +20,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*=\s*("|')Albatross\1/.test(commentless_code))
 ```
 
-You should still have a `text` variable with the value `Hello World`.
+You should still have a `text` variable with the value `'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index 442d9c6cb33..a98c25c7099 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index 71e999219ba..d239d653b25 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
index 1b13cf4c93e..61eb3d1e31f 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
@@ -16,13 +16,13 @@ Delete `pass` and recursively call the `_insert` method on the left child of the
 You should call the `self._insert` method passing `node.left` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the `left` attribute of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
index 398e320ad67..6df3804daa9 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
@@ -14,13 +14,13 @@ Inside your `elif` clause, replace `pass` with a call to the `_insert` method on
 You should call the `self._insert()` method passing `node.right` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the right attribute (`node.right`) of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
index 63c57b98650..6275b91f801 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
@@ -25,7 +25,7 @@ You should call the `_search` method within the `search` method.
 You should call the `_search` method passing `self.root` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
index 7ce15a8854e..5f81590e356 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
@@ -14,7 +14,7 @@ Now, make the `search` method return the result of the `_search()` call.
 You should prepend the `return` statement to your `_search()` call.
 
 ```js
-({ test: () => assert.match(code, /return\s+self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /return\s+self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
index 2762bb720c9..463cb27064f 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
@@ -22,8 +22,8 @@ assert.match(after_split, /if\s+key\s+<\s+node\.key/);
 
 You should return `self._search(node.left, key)` from your new `if` block.
 
-```js    
-({ test: () => assert.match(code, /return\s+self\._search\(node\.left,\s*key\)/) });    
+```js
+({ test: () => assert.match(code, /return\s+self\._search\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
index 3729cf5b069..496cf5003e9 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
@@ -25,14 +25,14 @@ assert.match(after_split, /self\._search/);
 You should pass two arguments to the call of the `_search` method: `node.right` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should return the result of the `_search` method call.
 
 ```js
 ({
-  test: () => assert.match(code, /return\s+self\._search\(node\.right,\s*key\)/)
+  test: () => assert.match(code, /return\s+self\._search\(\s*node\.right,\s*key\s*\)/)
 });
 ```
 
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
index 8f103eb0ce7..9bf0e27a0b8 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
@@ -18,7 +18,7 @@ Within the `BinarySearchTree` class, define a `delete` method. It takes two para
 You should define a `delete` method with two parameters: `self` and `key`. Remember to use `pass`.
 
 ```js
-({ test: () => assert.match(code, /def\s+delete\(self,\s*key\)/) });
+({ test: () => assert.match(code, /def\s+delete\(\s*self,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
index 472ae7428a0..2ad46e4a65e 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
@@ -14,7 +14,7 @@ Inside the `delete` method, delete `pass` and call the private helper method `_d
 Your `delete` method should call the `_delete` method with two arguments: `self.root` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
index 88d3bdeaa00..89049b841a8 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
@@ -16,7 +16,7 @@ To handle this case, assign the result of the `_delete` call to `self.root`.
 You should assign the result of the `_delete()` call to `self.root`.
 
 ```js
-({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
index f74aa7254a9..6c90bb6aa44 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
@@ -14,7 +14,7 @@ Inside the `BinarySearchTree` class, define a new helper method called `_delete`
 You should define the `_delete` method inside the `BinarySearchTree` class with the parameters `self`, `node` and `key`. Remember to use the `pass` keyword.
 
 ```js
-assert.match(code, /def\s+_delete\(self,\s*node,\s*key\)/);
+assert.match(code, /def\s+_delete\(\s*self,\s*node,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
index 4a10e3e2ac1..574826a4ffa 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
@@ -14,13 +14,13 @@ Within the `if` block, replace `pass` with a call to the `_delete` method, passi
 You should call the `_delete` method with `node.left` and the `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to the left child (`node.left`) of the current node.
 
 ```js
-assert.match(code, /node\.left\s*=\s*self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /node\.left\s*=\s*self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
index ac99dff18a1..bc051104c03 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
@@ -23,13 +23,13 @@ assert.match(after_split, /elif\s+key\s+>\s+node\.key/);
 You should call the `_delete` method with `node.right` and `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to `node.right`.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
index 97d7bef8bdd..190c1a4ff2d 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
@@ -20,7 +20,7 @@ For now, add a `_min_value` call after your `elif` block, passing `node.right` a
 You should assign `self._min_value(node.right)` to `node.key` after your `elif` block.
 
 ```js
-assert.match(code, /node\.key\s*=\s*self\._min_value\(node\.right\)/);
+assert.match(code, /node\.key\s*=\s*self\._min_value\(\s*node\.right\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
index ea24a00e200..3e9f5ec2b26 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
@@ -22,7 +22,7 @@ assert.match(code, /self\._delete\(\s*node\.right\s*,\s*node\.key\s*/);
 You should assign the return value of the `_delete()` call to the right child of the current node.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right\,\s*node\.key/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right\,\s*node\.key/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
index 5ec1525f67c..350c767fc6d 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
@@ -16,7 +16,7 @@ This will start the traversal from the root of the binary search tree (`self.roo
 You should call `_inorder_traversal` and pass `self.root` and `result` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._inorder_traversal\(self\.root,\s*result\)/) })
+({ test: () => assert.match(code, /self\._inorder_traversal\(\s*self\.root,\s*result\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
index 0de3806ae99..73c483541d2 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
@@ -14,7 +14,7 @@ Define the `_inorder_traversal` method and give it three parameters: `self`, `no
 You should define a method `_inorder_traversal` that takes three parameters: `self`, `node`, and `result`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+_inorder_traversal\(self,\s*node,\s*result\)/);
+assert.match(code, /def\s+_inorder_traversal\(\s*self,\s*node,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
index e8dc8e7498a..56e81aa9713 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
@@ -20,7 +20,7 @@ assert.match(code, /if\s+node:/);
 You should call `_inorder_traversal` on the `node.left` inside the `if` block.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.left\s*,\s*result\s*\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.left\s*,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
index d11e0e4ce9a..a5f65ee7030 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
@@ -14,7 +14,7 @@ Still inside the `if` block, append the `key` of the current node to the `result
 You should append `node.key` to the `result` list.
 
 ```js
-assert.match(code, /result\.append\(node\.key\)/);
+assert.match(code, /result\.append\(\s*node\.key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
index 4b8c1ace9da..17b4f7ef31b 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
@@ -16,13 +16,13 @@ Create an instance of the `BinarySearchTree` class and assign it to the variable
 You should create an instance of the `BinarySearchTree` class.
 
 ```js
-assert.match(code, /BinarySearchTree\(\)/);
+assert.match(code, /BinarySearchTree\(\s*\)/);
 ```
 
 You should assign the new instance of `BinarySearchTree` to the variable `bst`.
 
 ```js
-assert.match(code, /bst\s*=\s*BinarySearchTree\(\)/);
+assert.match(code, /bst\s*=\s*BinarySearchTree\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
index 4196c76f9f0..ee3e86d45e5 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
@@ -20,7 +20,7 @@ assert.match(code, /nodes/);
 Your `node` variable should have the value `[50, 30, 20, 40, 70, 60, 80]`.
 
 ```js
-assert.match(code, /nodes\s*=\s*\[50,\s*30,\s*20,\s*40,\s*70,\s*60,\s*80\]/);
+assert.match(code, /nodes\s*=\s*\[\s*50\s*,\s*30\s*,\s*20\s*,\s*40\s*\s*,\s*70\s*,\s*60\s*,\s*80\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
index c5e522d8ef5..3de1e373a30 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
@@ -16,7 +16,7 @@ This recursive call explores the entire right subtree in an in-order manner.
 You should call `_inorder_traversal` passing `node.right` and `result` as the arguments.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.right,\s*result\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.right,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
index 3982d433e8f..9f345a33a10 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
@@ -16,7 +16,7 @@ To change that to print a useful value, define another method named `__str__` in
 You should define a method `__str__` that takes a single argument `self`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+__str__\(self\)/);
+assert.match(code, /def\s+__str__\(\s*self\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
index d60ac2d09d3..b7f0ee5078b 100644
--- a/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
+++ b/curriculum/challenges/arabic/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
@@ -14,7 +14,7 @@ In the body of the `__str__` method, delete `pass` and return the result of call
 You should return the string value of `self.key` from your `__str__` method.
 
 ```js
-({ test: () => assert.match(code, /^\s{8}return\s+str\(self\.key\)/m) })
+({ test: () => assert.match(code, /^\s{8}return\s+str\(\s*self\.key\s*\)/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md b/curriculum/challenges/arabic/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
index 1f6c1b8a053..d66ff79dee8 100644
--- a/curriculum/challenges/arabic/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
+++ b/curriculum/challenges/arabic/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
@@ -13,16 +13,12 @@ Lastly change the text color of the `terms and conditions` link element to `#dfd
 
 # --hints--
 
-يجب عليك استخدام منتقي العناصر `a`.
-
-```js
-assert.exists(new __helpers.CSSHelp(document).getStyle('a'));
-```
 
 يجب عليك إعطاء عناصر `a` الـ `color` بقيمة `#dfdfe2`.
 
 ```js
-assert.equal(new __helpers.CSSHelp(document).getStyle('a')?.color, 'rgb(223, 223, 226)');
+const linkElement = document.querySelector("a");
+assert.equal(window.getComputedStyle(linkElement)?.color, 'rgb(223, 223, 226)');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
index 09412cc3a31..0ea718d968a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
@@ -10,11 +10,9 @@ dashedName: build-a-cash-register
 
 Here you'll build a cash register app that will return change to the customer based on the price of the item, the amount of cash provided by the customer, and the amount of cash in the cash drawer. You'll also need to show different messages to the user in different scenarios, such as when the customer provides too little cash or when the cash drawer doesn't have enough to issue the correct change.
 
-There are a few variables you'll need to use in your code:
+In the `script.js` file, you have been provided with the `price` and `cid` variables. The `price` variable is the price of the item, and the `cid` variable is the cash-in-drawer, which is a 2D array listing the available currency in the cash drawer.
 
-- `price`: the price of the item as a floating point number.
-- `cash`: the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
-- `cid`: cash-in-drawer, a 2D array listing available currency in the cash drawer.
+The other variable you will need add is the `cash` variable, which is the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
 
 If you'd like to test your application with different values for `price` and `cid`, make sure to declare them with the `let` keyword so they can be reassigned by our tests.
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
index fe6f43c6855..94c0f6cce14 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
@@ -28,10 +28,10 @@ In this project, you'll build an app that will search for Pokémon by name or ID
 1. You should have an element with an `id` of `special-defense`
 1. You should have an element with an `id` of `speed`
 1. When the `#search-input` element contains the value `Red` and the `#search-button` element is clicked, an alert should appear with the text `Pokémon not found`
-1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
+1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the `#types` element should contain a single inner element with the value `ELECTRIC`. The `#types` element content should be cleared between searches
-1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
+1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed`elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the `#types` element should contain two inner elements with the text values `GHOST` and `POISON`, respectively. The `#types` element content should be cleared between searches
 
@@ -158,7 +158,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
+When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
 
 ```js
 async () => {
@@ -251,7 +251,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
+When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
 
 ```js
 async () => {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
index 87403fe8d7b..0afb0a5e66f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
@@ -11,7 +11,7 @@ Now that you have the value of the input, you need to split it into an array of
 
 The `.split()` method takes a string and splits it into an array of strings. You can pass it a string of characters or a RegEx to use as a separator. For example, `string.split(",")` would split the string at each comma and return an array of strings.
 
-Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces seperating your values. Store the array in an `array` variable.
+Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces separating your values. Store the array in an `array` variable.
 
 # --hints--
 
@@ -36,7 +36,7 @@ assert.match(code.toString(),  /array\s*=\s*value\.split()/);
 You should use `/,\s*/g` for the `split()` method's separator.
 
 ```js
-assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\)/);
+assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
index 8c9a0f2d28e..b5cd74c6a43 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
@@ -22,7 +22,7 @@ assert.match(calculate.toString(), /numbers/);
 You should use the `.map()` method on your `array` variable.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\)/);
+assert.match(calculate.toString(), /array\.map\(\s*\)/);
 ```
 
 You should assign the result of your `.map()` call to your `numbers` variable.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
index 8c458116261..e32488bb058 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
@@ -24,7 +24,7 @@ Add a callback function to your `.map()` method that converts each element to a
 Your `.map()` method should have a callback function which takes an `el` parameter.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use the `Number` constructor to convert `el` to a number.
@@ -42,7 +42,7 @@ assert.notMatch(calculate.toString(), /new/);
 Your callback function should return the element converted to a number.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
index 373b4f69d57..32158500c6a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
@@ -24,13 +24,13 @@ assert.match(calculate.toString(), /filtered/);
 Your `calculate` function should use the `.filter()` method on the `numbers` array.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\)/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*\)/)
 ```
 
 You should assign the result of `numbers.filter()` to the `filtered` variable.
 
 ```js
-assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\)/);
+assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
index 0b47aab84e7..3627060d9d3 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
@@ -26,7 +26,7 @@ Add a callback function to your `.filter()` method that returns `true` if the el
 Your `.filter()` method should have a callback which accepts `el` as a parameter.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use `!` and `isNaN()` to check if `el` is NOT `NaN`.
@@ -38,7 +38,7 @@ assert.match(calculate.toString(), /!\s*(Number\.)?isNaN\(\s*el\s*\)/);
 Your callback function should return elements that are not `NaN`.
 
 ```js
-assert.match(calculate.toString(), /(numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
index 286d0de8f04..ead070ee889 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
@@ -28,20 +28,19 @@ assert.notMatch(calculate.toString(), /filtered/);
 You should chain your `.filter()` call to your `.map()` call.
 
 ```js
-console.log(calculate.toString());
 assert.match(calculate.toString(), /array\.map\(.*\)\.filter\(/s);
 ```
 
 You should not remove the `.map()` callback.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 You should not remove the `.filter()` callback.
 
 ```js
-assert.match(calculate.toString(), /(\.filter\(\(?\s*el\s*\)?\s*=>|\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
+assert.match(calculate.toString(), /(\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
index 3123e3787fc..11c129ed9df 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
@@ -22,13 +22,13 @@ assert.match(getMean.toString(), /sum/);
 Your `getMean` function should use the `.reduce()` method of the `array` parameter.
 
 ```js
-assert.match(getMean.toString(), /array\.reduce\(\)/);
+assert.match(getMean.toString(), /array\.reduce\(\s*\)/);
 ```
 
 You should assign the result of `array.reduce()` to the `sum` variable.
 
 ```js
-assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\)/);
+assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
index 23fb51273e8..f955c417623 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
@@ -22,13 +22,13 @@ For your `sum` variable, pass a callback to `.reduce()` that takes the accumulat
 Your `reduce` method should have a callback function which takes an `acc` and an `el` parameters.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)/)
 ```
 
 Your `reduce` method should return the sum of `acc` and `el`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
index 88c47fd56a5..4d75b5ff010 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
@@ -22,7 +22,7 @@ Set the initial value of the accumulator to `0`.
 Your `reduce` method should have `0` as the initial value.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
index 4ec58d04ac3..04b4aa83cff 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
@@ -28,19 +28,19 @@ assert.notMatch(getMean.toString(), /mean\s*=/);
 You should not change the logic within the `reduce` method.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 You should divide the result of the `reduce` method by the length of the array.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)\s*\/\s*array\.length/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 You should use implicit return syntax to directly return the result of `reduce` divided by the array length.
 
 ```js
-assert.match(code, /const\s+getMean\s*=\s*\(?array\)?\s*=>\s*array\.reduce\(\(acc\s*,\s*el\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
+assert.match(code, /const\s+getMean\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
index 41ec2869784..836abf04d00 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
@@ -18,13 +18,13 @@ To sort your numbers from smallest to largest, pass a callback function that tak
 Your `sort` method should have a callback function which takes an `a` and a `b` parameters.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)/)
 ```
 
 Your `sort` method should return the result of subtracting `b` from `a`.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
index a23bc59a5d8..171f2962a19 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
@@ -34,13 +34,13 @@ assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0
 If `array.length` is even, pass an array with the two middle numbers from the `sorted` array to the `getMean` function. The first item in the array argument should be the value at index `array.length / 2` from `sorted` and the second should use the value at the index `array.length / 2 - 1` from `sorted`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:/);
 ```
 
 If the `array.length` is odd, your `median` variable should assign the middle number to the `median` variable. The middle number is the value of `sorted` at `Math.floor(array.length / 2)`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:\s*sorted\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\)\];/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:\s*sorted\s*\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\s*\)\s*\]\s*;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
index 25ebad89a0e..d3f17f6c618 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
@@ -22,13 +22,13 @@ assert.match(calculate.toString(), /median\s*=/);
 Your `median` variable should be assigned the value of `getMedian(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /median\s*=\s*getMedian\(numbers\)/);
+assert.match(calculate.toString(), /median\s*=\s*getMedian\(\s*numbers\s*\)/);
 ```
 
 Your `calculate` function should query the DOM for the `#median` element and set the `textContent` to `median`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#median\1\)\.textContent\s*=\s*median/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#median\1\s*\)\.textContent\s*=\s*median/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
index c09262cdd84..398fab28bd1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
@@ -22,14 +22,13 @@ assert.match(getMode.toString(), /array\.forEach\(/);
 Your `.forEach()` method should have a callback function which takes an `el` parameter.
 
 ```js
-console.log(getMode.toString());
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)/);
 ```
 
 Your `.forEach()` method should increment the count for each number. Don't forget the fallback value.
 
 ```js
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)\s*\{?\s*(return)?\s*counts\[\s*el\s*\]\s*=\s*\(\s*counts\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)\s*\{?\s*(return)?\s*counts\s*\[\s*el\s*\]\s*=\s*\(\s*counts\s*\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
index ecb256c5343..dc865d7d709 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
@@ -24,19 +24,19 @@ assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.so
 Your `getMode` function should pass a callback to the `sort` method with parameters `a` and `b`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)/)
 ```
 
 Your `getMode` function should use the `sort` method to sort the `Object.keys()` array and return the value of `counts[b]` minus the value of `counts[a]`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)/)
 ```
 
 Your `highest` variable should have the value of the first entry in the sorted `Object.keys(counts)` array.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)\[0\];/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)\s*\[\s*0\s*\]\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
index 2415a5af6b0..e6f306055ec 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
@@ -20,13 +20,13 @@ assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filte
 Your `.filter()` method should take a callback function with a parameter `el`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)/);
 ```
 
 Your `.filter()` method should return whether the value of `counts[el]` is equal to `counts[highest]`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\[\s*el\s*\]\s*===\s*counts\[\s*highest\s*\];\s*\}/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\s*\[\s*el\s*\]\s*===\s*counts\s*\[\s*highest\s*\]\s*;\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
index 10a4f465d92..78a0941990f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /mode\s*=\s*getMode\(\s*numbers\s*\);/);
 Your `calculate` function should query the DOM for the `#mode` element and set the `textContent` to `mode`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#mode\1\)\.textContent\s*=\s*mode;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#mode\1\s*\)\.textContent\s*=\s*mode;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
index 1dd05dd96be..71de3bd791e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
@@ -12,7 +12,10 @@ Your next calculation is the <dfn>range</dfn>, which is the difference between t
 You previously learned about the global `Math` object. `Math` has a `.min()` method to get the smallest number from a series of numbers, and the `.max()` method to get the largest number. Here's an example that gets the smallest number from an array:
 
 ```js
-Math.min(1, 9, 11, -3, 0.5);
+const numbersArr = [2, 3, 1];
+
+console.log(Math.min(...numbersArr));
+// Expected output: 1
 ```
 
 Declare a `getRange` function that takes the same `array` parameter you have been using. Using `Math.min()`, `Math.max()`, and the spread operator, return the difference between the largest and smallest numbers in the list.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
index 3461129df1d..62be62ebf63 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
@@ -14,13 +14,13 @@ Add the logic for calculating and displaying the range to your `calculate` funct
 Your `calculate` function should set a `range` variable to the result of `getRange(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /range\s*=\s*getRange\(numbers\);/);
+assert.match(calculate.toString(), /range\s*=\s*getRange\(\s*numbers\s*\);/);
 ```
 
 Your `calculate` function should set the `#range` element's `textContent` to the `range` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#range\1\)\.textContent\s*=\s*range;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#range\1\s*\)\.textContent\s*=\s*range;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
index 02b84764104..b21796dc2e8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
@@ -26,13 +26,13 @@ assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(/);
 Your `differences` variable should use the `el` parameter in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Your `map` callback should return the value of `el` minus `mean`.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
index 379d1afa733..9190c16f086 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
@@ -28,13 +28,13 @@ assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\
 Your `squaredDifferences` variable should use the `el` parameter in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Your `map` callback should return the value of `el` squared.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
 ```
 
 Your `map` callback should use the `**` operator.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
index ba3283ba507..f7b77d29c7d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
@@ -28,14 +28,13 @@ assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDiffere
 Your `sumSquaredDifferences` variable should use the `acc` and `el` parameters in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Your `reduce` callback should return the sum of `acc` and `el`.
 
 ```js
-console.log(getVariance.toString());
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
index 59c486b27b9..2253f1f8582 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
@@ -46,19 +46,19 @@ assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(/);
 Your `variance` variable should use the `acc` and `el` parameters in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Your `reduce` callback should be an empty function.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}/);
 ```
 
 Your `reduce` callback should have an initial value of `0`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}\s*,\s*0\s*\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
index a822e35acd0..f15f8ea3732 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
@@ -14,37 +14,37 @@ Within your empty `.reduce()` callback, declare a variable `difference` and set
 Your `reduce` callback should have a `difference` variable.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=/);
 ```
 
 Your `difference` variable should be set to the value of `el` minus `mean`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
 ```
 
 Your `reduce` callback should have a `squared` variable.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
 ```
 
 Your `squared` variable should be set to the value of `difference` to the power of 2.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
 ```
 
 Your `reduce` callback should return the value of `acc` plus `squared`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
 ```
 
 You should not remove the initial value of `0` from your `.reduce()` method.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
index e70d3e7656c..ed853638976 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
@@ -16,7 +16,7 @@ Divide your `.reduce()` call by the length of the array (in your `variance` decl
 You should divide the result of the `.reduce()` call by the length of the array.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)\s*\/\s*array\.length;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)\s*\/\s*array\.length;/);
 ```
 
 You should return the value of `variance`.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
index 63f3eade7fe..478443d2529 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /variance\s*=\s*getVariance\(\s*numbers\s*\)/
 You should set the `textContent` of the `#variance` element to the value of the `variance` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#variance\1\)\.textContent\s*=\s*variance/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#variance\1\s*\)\.textContent\s*=\s*variance/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
index bdb88c50ff4..0e0a8540946 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
@@ -14,13 +14,13 @@ Now update the `calculate` function to include the standard deviation logic, lik
 Your `calculate` function should have a `standardDeviation` variable set to the result of `getStandardDeviation(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(numbers\)/);
+assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(\s*numbers\s*\)/);
 ```
 
 You should update the `textContent` of the `#standardDeviation` element to be the `standardDeviation` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#standardDeviation\1\)\.textContent\s*=\s*standardDeviation/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#standardDeviation\1\s*\)\.textContent\s*=\s*standardDeviation/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
index 2b4c3a10d9c..6179831b5b0 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
@@ -16,19 +16,19 @@ To fix this, add an empty `.slice()` call before your `.sort()` method. The empt
 You should call `.slice()` on the `array` parameter.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)/);
 ```
 
 Your `.sort()` call should be chained to the `.slice()` call.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(/);
 ```
 
 You should not modify the `.sort()` method callback.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
index a946f911fc5..6d1d89c9410 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
@@ -24,7 +24,7 @@ Use the `async` keyword to create an asynchronous arrow function called `fetchDa
 You should use the `async` keyword to create an asynchronous arrow function called `fetchData`.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*[^}]*\s*}/);
 ```
 
 `fetchData` should be defined.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
index 22082c2b460..3d2d795120d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
@@ -37,7 +37,7 @@ assert.match(code, /\s*const\s+res\s*=\s*await\s+fetch\(\s*(.*)\s*\)/);
 You should pass in the `forumLatest` constant to the `fetch` call.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
index 143cd902317..d82695bdef8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+data/);
 You should assign `await res.json()` to the `data` variable.
 
 ```js
-assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\);?\s*/);
+assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
index 1aa78bc12ad..a0659e566a6 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
@@ -28,7 +28,7 @@ assert.match(code, /\s*try\s*{[\s\S]*\s*console\.log\(\s*data\s*\)[\s\S]*}\s*cat
 You should call the `fetchData()` function, after the `fetchData()` function is defined.
 
 ```js
-assert.match(code, /};?\s*fetchData\(\)/);
+assert.match(code, /};?\s*fetchData\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
index ff73503d329..52b78f485e2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
@@ -22,7 +22,7 @@ assert.match(code, /\s*showLatestPosts\(.*\);??\s*/);
 You should pass `data` as the argument to `showLatestsPosts()`.
 
 ```js
-assert.match(code, /\s*showLatestPosts\(data\);?\s*/);
+assert.match(code, /\s*showLatestPosts\(\s*data\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
index 4489056f01f..d45019d378e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
@@ -20,7 +20,7 @@ assert.match(code, /\s*const\s+thousands\s*=/);
 Your should assign `Math.floor(views / 1000)` to your `thousands` variable.
 
 ```js
-assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(views\s*\/\s*1000\)\s*/);
+assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(\s*views\s*\/\s*1000\s*\)\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
index 589ba81f233..798b38afaf1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
@@ -14,7 +14,7 @@ Inside the `if` statement, destructure `className` and `category` from the `allC
 You should destructure `className` and `category` from the `allCategories[id]` object. The properties can be in any order.
 
 ```js
-assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\[id\]\s*/g));
+assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\s*\[\s*id\s*\]\s*/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
index 31f9290fa3a..0676ca29947 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
@@ -27,19 +27,19 @@ Inside your `fetchData` function, add a `try...catch` statement. The `catch` blo
 You should have a `try` block inside your `fetchData` function.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
 ```
 
 You should have a `catch` block after your `try` block.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
 ```
 
 Your `catch` block should have an `err` parameter.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
 ```
 
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
index 0bf669ce63b..1c2bb438be6 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+postsContainer\s*=/);
 You should use `document.getElementById()` to get the `#posts-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)posts-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/);
 ```
 
 You should assign the `#posts-container` element to your `postsContainer` variable.
 
 ```js
-assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(('|"|`)posts-container\1\)/g));
+assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
index b6fddc55ea1..ff579a1c92b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
@@ -14,7 +14,7 @@ You will be using this as an event listener for the `sortButton`. Because button
 Your `sortInputArray` function should call `event.preventDefault()`.
 
 ```js
-assert.match(sortInputArray.toString(), /event\.preventDefault\(\)/);
+assert.match(sortInputArray.toString(), /event\.preventDefault\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
index 4352b2ed6d3..81ad9316ddb 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*
 You should assign `temp` the value of `array[j]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?/);
 ```
 
 You should assign `array[j]` the value of `array[j + 1]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?/);
 ```
 
 You should assign `array[j + 1]` the value of `temp`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
index 4300edb6ec0..96e3eafb555 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished executing, return the sorted array.
 You should `return` the `array` variable.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
index 77053630e72..bba22da86e0 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
@@ -17,7 +17,7 @@ You should remove your `console.log()` call.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(bubbleSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(bubbleSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
index 95e89bccc70..810622c0129 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{
 You should assign `array[i]` to `temp`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]/)
 ```
 
 You should assign `array[minIndex]` to `array[i]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]/)
 ```
 
 You should assign `temp` to `array[minIndex]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
index 8980ed4b762..592955fb781 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished, you need to return the array. Once
 You should `return` the `array` after your outer loop completes.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
index 40a86c66067..691dd9318f4 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
@@ -15,7 +15,7 @@ You should remove the `console.log()` statement from `selectionSort()`.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(selectionSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(selectionSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
index f7132d200ea..10beeeffc99 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
@@ -16,7 +16,7 @@ Do so by assigning the value at the `j` index to the next index.
 Before decrementing `j`, assign the value at `j` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
index 30f9ea31762..176bc466aea 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
@@ -16,7 +16,7 @@ Use the assignment operator to insert your current value into the correct index.
 You should assign `currValue` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
+assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
index ec06c11ce79..bc7228c8c09 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
@@ -14,7 +14,7 @@ After your `for` loop has finished, you need to return the array. You should the
 You should `return` the `array`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
index 64451ab8bd9..53f85b0bf4f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
@@ -11,7 +11,7 @@ One of the most powerful tools is your developer console. Depending on your brow
 
 The developer console will include errors that are produced by your code, but you can also use it to see values of variables in your code, which is helpful for debugging.
 
-Add a `console.log("Hello World");` line between your `script` tags. Then click the "Console" button to open the console. You should see the text `Hello World`.
+Add a `console.log("Hello World");` line between your `script` tags. Then click the "Console" button to open the console. You should see the text `"Hello World"`.
 
 Note how the line ends with a semi-colon. It is common practice in JavaScript to end your code lines with semi-colons.
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
index f97a16d838f..8aec1fe60fc 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
@@ -10,10 +10,10 @@ dashedName: step-7
 Variables can be <dfn>assigned</dfn> a value. When you do this while you declare it, this is called <dfn>initialization</dfn>. For example:
 
 ```js
-let camperbot = "Bot";
+let age = 32;
 ```
 
-This would initialize the `camperbot` variable with a value of `Bot`, a string.
+This would initialize the `age` variable with a value of `32`, a number.
 
 Initialize your `xp` variable to have a value of `0`, a number.
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
index bbe36de1357..ca6f2dc1138 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
@@ -15,7 +15,7 @@ let order = ["first", "second", "third"];
 
 This is an array which holds three values. Notice how the values are separated by commas.
 
-Change your `inventory` variable to be an array with the strings `stick`, `dagger`, and `sword`.
+Change your `inventory` variable to be an array with the strings `"stick"`, `"dagger"`, and `"sword"`.
 
 # --hints--
 
@@ -31,19 +31,19 @@ Your `inventory` variable should have three values.
 assert.lengthOf(inventory, 3);
 ```
 
-Your `inventory` variable should include the string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
 ```
 
-Your `inventory` variable should include the string `dagger`.
+Your `inventory` variable should include the string `"dagger"`.
 
 ```js
 assert.include(inventory, "dagger");
 ```
 
-Your `inventory` variable should include the string `sword`.
+Your `inventory` variable should include the string `"sword"`.
 
 ```js
 assert.include(inventory, "sword");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
index d02e648b202..448da406750 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-For now, you want the player to start with just the `stick`. Change the `inventory` array to have `stick` as its only value.
+For now, you want the player to start with just the `"stick"`. Change the `inventory` array to have `"stick"` as its only value.
 
 # --hints--
 
@@ -23,7 +23,7 @@ Your `inventory` variable should only have one value.
 assert.lengthOf(inventory, 1);
 ```
 
-Your `inventory` variable should include the string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
index 7683ce8e490..af942191f6a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
@@ -33,10 +33,10 @@ You should use `document.querySelector()`.
 assert.match(code, /document\.querySelector/);
 ```
 
-You should use the `#button1` selector.
+You should use the `"#button1"` selector.
 
 ```js
-assert.match(code, /querySelector\(('|")#button1\1\)/);
+assert.match(code, /querySelector\(\s*('|")#button1\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
index 6bd456556e9..797e60991da 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
@@ -9,12 +9,14 @@ dashedName: step-40
 
 `button1` represents your first `button` element. These elements have a special property called `onclick`, which you can use to determine what happens when someone clicks that button.
 
-You can access properties in JavaScript a couple of different ways. The first is with <dfn>dot notation</dfn>. Accessing the `onclick` property of a button would look like:
+You can access properties in JavaScript a couple of different ways. The first is with <dfn>dot notation</dfn>. Here is an example of using dot notation to set the `onclick` property of a button to a function reference.
 
 ```js
-button.onclick
+button.onclick = myFunction;
 ```
 
+In this example, `button` is the button element, and `myFunction` is a reference to a function. When the button is clicked, `myFunction` will be called.
+
 Use dot notation to set the `onclick` property of your `button1` to the function reference of `goStore`. Note that `button1` is already declared, so you don't need to use `let` or `const`.
 
 # --hints--
@@ -31,10 +33,10 @@ You should not use `let` or `const`.
 assert.notMatch(code, /(let|const)\s+button1\.onclick/);
 ```
 
-You should assign the `goStore` function reference to `button1.onclick`.
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button1\.onclick\s*=\s*goStore/);
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
index c2291bf3a41..b22438a8539 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
@@ -13,6 +13,12 @@ Using the same syntax, set the `onclick` properties of `button2` and `button3` t
 
 # --hints--
 
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
+
+```js
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
+```
+
 You should use dot notation to access the `onclick` property of `button2`.
 
 ```js
@@ -25,10 +31,10 @@ You should not use `let` or `const` to assign `button2.onclick`.
 assert.notMatch(code, /(let|const)\s+button2\.onclick/);
 ```
 
-You should set the `onclick` property of `button2` to the variable `goCave`.
+You should assign the `goCave` function reference to `button2.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button2\.onclick\s*=\s*goCave/);
+assert.match(code, /button2\.onclick\s*=\s*goCave\s*;?\s*$/m);
 ```
 
 You should use dot notation to access the `onclick` property of `button3`.
@@ -43,10 +49,10 @@ You should not use `let` or `const` to assign `button3.onclick`.
 assert.notMatch(code, /(let|const)\s+button3\.onclick/);
 ```
 
-You should set the `onclick` property of `button3` to the variable `fightDragon`.
+You should assign the `fightDragon` function reference to `button3.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button3\.onclick\s*=\s*fightDragon/);
+assert.match(code, /button3\.onclick\s*=\s*fightDragon\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
index e8dcac0e2a5..9c0d4012a26 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-For now, make your `goStore` function output the message `Going to store.` to the console. For example, here is a function that outputs the message `Hello World`.
+For now, make your `goStore` function output the message `"Going to store."` to the console. For example, here is a function that outputs the message `"Hello World"`.
 
 ```js
 function functionName() {
@@ -20,13 +20,13 @@ function functionName() {
 You should have a `console.log("Going to store.");` line in your code. Don't forget the semi-colon.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to store\.\1\);/);
+assert.match(code, /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 Your `console.log("Going to store.");` line should be in your `goStore` function.
 
 ```js
-assert.match(goStore.toString(), /console\.log\(('|")Going to store\.\1\);/);
+assert.match(goStore.toString(), /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
index 479e5a02ec4..b69b0c6500d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
@@ -7,7 +7,7 @@ dashedName: step-37
 
 # --description--
 
-Now create a `goCave` function that prints `Going to cave.` to the console.
+Now create a `goCave` function that prints `"Going to cave."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(goCave);
 You should have a `console.log("Going to cave.");` line in your code.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 Your `console.log("Going to cave.");` line should be inside your `goCave` function.
 
 ```js
-assert.match(goCave.toString(), /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(goCave.toString(), /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
index 0a1efd4fb60..f95534d380d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
@@ -7,7 +7,7 @@ dashedName: step-38
 
 # --description--
 
-Now create a `fightDragon` function that prints `Fighting dragon.` to the console.
+Now create a `fightDragon` function that prints `"Fighting dragon."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(fightDragon);
 You should have a `console.log("Fighting dragon.");` line in your code.
 
 ```js
-assert.match(code, /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 Your `console.log("Fighting dragon.");` line should be inside your `fightDragon` function.
 
 ```js
-assert.match(fightDragon.toString(), /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(fightDragon.toString(), /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
index d1ec03b3a00..62dbdac6e74 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
@@ -9,21 +9,25 @@ dashedName: step-42
 
 The `innerText` property controls the text that appears in an HTML element. For example:
 
-```js
-const info = document.querySelector("#info");
-info.innerText = "Hello World";
+```html
+<p id="info">Demo content</p> 
 ```
 
-This code would change the element assigned to the `info` variable to have the text `Hello World`.
+```js
+const info = document.querySelector("#info"); 
+info.innerText = "Hello World"; 
+```
 
-When a player clicks your `Go to store` button, you want to change the buttons and text. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `Buy 10 health (10 gold)`.
+The following example would change the text of the `p` element from `Demo content` to `Hello World`.
+
+When a player clicks your `Go to store` button, you want to change the buttons and text. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `"Buy 10 health (10 gold)"`.
 
 # --hints--
 
 You should not have a `console.log("Going to store.");` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(('|")Going to store\.\1\)/);
+assert.notMatch(code, /console\.log\(\s*('|")Going to store\.\1\s*\)/);
 ```
 
 You should use dot notation to access the `innerText` property of `button1`.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
index 09595bb1b69..46633d1a6af 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, add a line that updates the text of `button2` to say `Buy weapon (30 gold)` and update the text of `button3` to say `Go to town square`.
+Now, add a line that updates the text of `button2` to say `"Buy weapon (30 gold)"` and update the text of `button3` to say `"Go to town square"`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button2\.innerText/);
 ```
 
-You should update the `innerText` property of `button2` to be `Buy weapon (30 gold)`.
+You should update the `innerText` property of `button2` to be `"Buy weapon (30 gold)"`.
 
 ```js
 assert.match(code, /button2\.innerText\s*=\s*('|")Buy weapon \(30 gold\)\1/);
@@ -47,7 +47,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button3\.innerText/);
 ```
 
-You should update the `innerText` property of `button3` to be `Go to town square`.
+You should update the `innerText` property of `button3` to be `"Go to town square"`.
 
 ```js
 assert.match(code, /button3\.innerText\s*=\s*('|")Go to town square\1/);
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
index 65ab19d7b57..23920a8fd68 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Now you need to modify your display text. Change the `innerText` property of the `text` to be `You enter the store.`.
+Now you need to modify your display text. Change the `innerText` property of the `text` to be `"You enter the store."`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `text`
 assert.notMatch(code, /(let|const)\s+text\.innerText/);
 ```
 
-You should update the `innerText` property of `text` to be `You enter the store.`.
+You should update the `innerText` property of `text` to be `"You enter the store."`.
 
 ```js
 assert.match(code, /text\.innerText\s*=\s*('|")You enter the store.\1/);
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
index 30ffe8024df..d0c9ec1991e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
@@ -7,25 +7,25 @@ dashedName: step-48
 
 # --description--
 
-In your `goTown` function, change your `button` elements' `innerText` properties to be `Go to store`, `Go to cave`, and `Fight dragon`. Update your `onclick` properties to be `goStore`, `goCave`, and `fightDragon`, respectively.
+In your `goTown` function, change your `button` elements' `innerText` properties to be `"Go to store"`, `"Go to cave"`, and `"Fight dragon"`. Update your `onclick` properties to be `goStore`, `goCave`, and `fightDragon`, respectively.
 
-Finally, update `innerText` property of your `text` to be `You are in the town square. You see a sign that says Store.`.
+Finally, update `innerText` property of your `text` to be `"You are in the town square. You see a sign that says Store."`.
 
 # --hints--
 
-You should set the `button1.innerText` property to be `Go to store` in your `goTown` function.
+You should set the `button1.innerText` property to be `"Go to store"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-You should set the `button2.innerText` property to be `Go to cave` in your `goTown` function.
+You should set the `button2.innerText` property to be `"Go to cave"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-You should set the `button3.innerText` property to be `Fight dragon` in your `goTown` function.
+You should set the `button3.innerText` property to be `"Fight dragon"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -49,7 +49,7 @@ You should set the `button3.onclick` property to be `fightDragon` in your `goTow
 assert.match(goTown.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-You should set the `text.innerText` property to be `You are in the town square. You see a sign that says Store.` in your `goTown` function.
+You should set the `text.innerText` property to be `"You are in the town square. You see a sign that says Store."` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /text\.innerText\s*=\s*('|")You are in the town square. You see a sign that says Store\.\1/);
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
index 4dbe7ea107b..a1037d94966 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
@@ -28,7 +28,7 @@ assert.match(code, /function\s+update/);
 Your `update` function should take a parameter called `location`.
 
 ```js
-assert.match(update.toString(), /update\(location\)/);
+assert.match(update.toString(), /update\(\s*location\s*\)/);
 ```
 
 Your `update` function should be empty.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
index 3c4c9fffb66..b1767342dc7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. For example, here is an object with a key of `name` set to `Quincy Larson`.
+Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. For example, here is an object with a key of `name` set to `"Quincy Larson"`.
 
 ```js
 {
@@ -15,7 +15,7 @@ Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is t
 }
 ```
 
-Add a `name` property to your empty object and give it a value of `town square`.
+Add a `name` property to your empty object and give it a value of `"town square"`.
 
 # --hints--
 
@@ -31,7 +31,7 @@ Your first value of `locations` should have a `name` property.
 assert.isDefined(locations[0].name);
 ```
 
-Your first value of `locations` should have a `name` property with a value of `town square`.
+Your first value of `locations` should have a `name` property with a value of `"town square"`.
 
 ```js
 assert.equal(locations[0].name, "town square");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
index a18a4f05b5d..cba2680e514 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
@@ -25,19 +25,19 @@ assert.isString(locations[0]["button text"][1]);
 assert.isString(locations[0]["button text"][2]);
 ```
 
-The first value in the `button text` array should be "Go to store".
+The first value in the `button text` array should be `"Go to store"`.
 
 ```js
 assert.equal(locations[0]["button text"][0], "Go to store");
 ```
 
-The second value in the `button text` array should be "Go to cave".
+The second value in the `button text` array should be `"Go to cave"`.
 
 ```js
 assert.equal(locations[0]["button text"][1], "Go to cave");
 ```
 
-The third value in the `button text` array should be "Fight dragon".
+The third value in the `button text` array should be `"Fight dragon"`.
 
 ```js
 assert.equal(locations[0]["button text"][2], "Fight dragon");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
index fab40445163..5241587b2d2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
@@ -23,7 +23,7 @@ Your `text` property should be a string.
 assert.isString(locations[0]["text"]);
 ```
 
-Your `text` property should have the value `You are in the town square. You see a sign that says \"Store\".`
+Your `text` property should have the value `"You are in the town square. You see a sign that says \"Store\"."`
 
 ```js
 assert.equal(locations[0]["text"], "You are in the town square. You see a sign that says \"Store\".");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
index 3215b996f44..2b4b511b144 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
@@ -37,7 +37,7 @@ Your second `locations` object should have a `button text` property which is an
 assert.isArray(locations[1]["button text"]);
 ```
 
-Your `button text` property should have the string values `Buy 10 health (10 gold)`, `Buy weapon (30 gold)`, and `Go to town square`.
+Your `button text` property should have the string values `"Buy 10 health (10 gold)"`, `"Buy weapon (30 gold)"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[1]["button text"][0], "Buy 10 health (10 gold)");
@@ -65,7 +65,7 @@ Your second `locations` object should have a `text` property which is a string.
 assert.isString(locations[1].text);
 ```
 
-Your second `locations` object should have a `text` property with the value of `You enter the store.`.
+Your second `locations` object should have a `text` property with the value of `"You enter the store."`.
 
 ```js
 assert.equal(locations[1].text, "You enter the store.");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
index b36e7b6f74f..6ac3ba5b333 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
@@ -11,19 +11,19 @@ Now you can consolidate some of your code. Start by copying the code from inside
 
 # --hints--
 
-Your `update` function should set `button1.innerText` to `Go to store`.
+Your `update` function should set `button1.innerText` to `"Go to store"`.
 
 ```js
 assert.match(update.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-Your `update` function should set `button2.innerText` to `Go to cave`.
+Your `update` function should set `button2.innerText` to `"Go to cave"`.
 
 ```js
 assert.match(update.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-Your `update` function should set `button3.innerText` to `Fight dragon`.
+Your `update` function should set `button3.innerText` to `"Fight dragon"`.
 
 ```js
 assert.match(update.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -47,7 +47,7 @@ Your `update` function should set `button3.onclick` to `fightDragon`.
 assert.match(update.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-Your `update` function should set `text.innerText` to `You are in the town square. You see a sign that says \"Store\".`.
+Your `update` function should set `text.innerText` to `"You are in the town square. You see a sign that says \"Store\"."`.
 
 ```js
 assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town square. You see a sign that says \\"Store\\"\."/);
@@ -56,13 +56,13 @@ assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town squa
 Your `goTown` function should be empty.
 
 ```js
-assert.match(goTown.toString(), /function goTown\(\) \{\}/);
+assert.match(goTown.toString(), /function goTown\(\s*\) \{\}/);
 ```
 
 Your `goStore` function should be empty.
 
 ```js
-assert.match(goStore.toString(), /function goStore\(\) \{\}/);
+assert.match(goStore.toString(), /function goStore\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
index b33a673c18c..3fecc2a0238 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
@@ -20,13 +20,13 @@ myFunction();
 You should call the `update` function in the `goTown` function.
 
 ```js
-assert.match(goTown.toString(), /update\(\)/);
+assert.match(goTown.toString(), /update\(\s*\)/);
 ```
 
 Don't forget your ending semi-colon.
 
 ```js
-assert.match(goTown.toString(), /update\(\);/);
+assert.match(goTown.toString(), /update\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
index cc490a974fa..e53b6ea71e6 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
@@ -20,7 +20,7 @@ myFunction(arg)
 يجب أن تبعث القائمة `locations` ألى `update` عند تفعيلها.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
index 300dd43a544..b1510540a56 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
@@ -7,7 +7,7 @@ dashedName: step-62
 
 # --description--
 
-The `locations` array contains two locations: the `town square` and the `store`. Currently you are passing that entire array into the `update` function.
+The `locations` array contains two locations: the `"town square"` and the `"store"`. Currently you are passing that entire array into the `update` function.
 
 Pass in only the first element of the `locations` array by adding `[0]` at the end of the variable. For example: `myFunction(arg[0]);`.
 
@@ -18,25 +18,25 @@ This is called <dfn>bracket notation</dfn>. Values in an array are accessed by i
 You should use bracket notation with `locations`.
 
 ```js
-assert.match(code, /locations\[/);
+assert.match(code, /locations\s*\[/);
 ```
 
 You should access the first object in the `locations` array. Remember that arrays are zero-based.
 
 ```js
-assert.match(code, /locations\[0\]/);
+assert.match(code, /locations\s*\[\s*0\s*\]/);
 ```
 
 You should pass the first object in the `locations` array into the `update` function.
 
 ```js
-assert.match(code, /update\(locations\[0\]\);/);
+assert.match(code, /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 This call should still be in your `goTown()` function.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\[0\]\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
index 905309169ca..6982815699d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
@@ -9,20 +9,20 @@ dashedName: step-63
 
 Now your `update` function needs to use the argument you pass into it.
 
-Inside the `update` function, change the value of the `button1.innerText` assignment to be `location["button text"]`. That way, you use bracket notation to get the `button text` property of the `location` object passed into the function.
+Inside the `update` function, change the value of the `button1.innerText` assignment to be `location["button text"]`. That way, you use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 # --hints--
 
-Your `update` function should use bracket notation to get the `button text` property of the `location` object passed into the function.
+Your `update` function should use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 ```js
 assert.match(update.toString(), /location[('|")button text\1]/);
 ```
 
-You should assign the value of the `button text` property of the `location` object to the `innerText` property of `button1`.
+You should assign the value of the `"button text"` property of the `location` object to the `innerText` property of `button1`.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
index 6bd25398768..10bd5b1d925 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
@@ -7,20 +7,20 @@ dashedName: step-64
 
 # --description--
 
-`location["button text"]` is an array with three elements. Change the `button1.innerText` assignment to be the first element of that array instead.
+`location["button text"]` is an array with three elements. Change the `button1.innerText` assignment to be `location["button text"][0]` which represents the first element of the array.
 
 # --hints--
 
-You should access the first element of the `button text` property of the `location` parameter.
+You should access the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.innerText` property to be the first element of the `button text` property of the `location` parameter.
+You should set the `button1.innerText` property to be the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
index 3906b73f231..3e3c4369184 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
@@ -7,32 +7,32 @@ dashedName: step-65
 
 # --description--
 
-Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `button text` array, respectively.
+Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `"button text"` array, respectively.
 
 # --hints--
 
-You should access the second element of the `button text` property of the `location` parameter.
+You should access the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.innerText` property to be the second element of the `button text` property of the `location` parameter.
+You should set the `button2.innerText` property to be the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.innerText\s*=\s*location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /button2\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button text` property of the `location` parameter.
+You should access the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.innerText` property to be the third element of the `button text` property of the `location` parameter.
+You should set the `button3.innerText` property to be the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.innerText\s*=\s*location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /button3\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
index 9cc79d0eef6..f6db1f69140 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
@@ -7,44 +7,44 @@ dashedName: step-66
 
 # --description--
 
-Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `button functions` array.
+Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `"button functions"` array.
 
 # --hints--
 
-You should access the first element of the `button functions` property of the `location` parameter.
+You should access the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.onclick` property to be the first element of the `button functions` property of the `location` parameter.
+You should set the `button1.onclick` property to be the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.onclick\s*=\s*location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /button1\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should access the second element of the `button functions` property of the `location` parameter.
+You should access the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.onclick` property to be the second element of the `button functions` property of the `location` parameter.
+You should set the `button2.onclick` property to be the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.onclick\s*=\s*location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /button2\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button functions` property of the `location` parameter.
+You should access the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.onclick` property to be the third element of the `button functions` property of the `location` parameter.
+You should set the `button3.onclick` property to be the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.onclick\s*=\s*location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /button3\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
index 63df177f5fb..36a8e54e43e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
@@ -22,7 +22,7 @@ assert.match(goStore.toString(), /update\(/);
 Your `goStore` function should pass the second element of the `locations` array as your argument to `update()`.
 
 ```js
-assert.match(goStore.toString(), /update\(locations\[1\]\)/);
+assert.match(goStore.toString(), /update\(\s*locations\s*\[\s*1\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
index 6e3c920c359..f00c035cf73 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
@@ -26,13 +26,13 @@ assert.isFunction(fightBeast);
 `fightSlime` should be empty.
 
 ```js
-assert.match(fightSlime.toString(), /function fightSlime\(\) \{\}/);
+assert.match(fightSlime.toString(), /function fightSlime\(\s*\) \{\}/);
 ```
 
 `fightBeast` should be empty.
 
 ```js
-assert.match(fightBeast.toString(), /function fightBeast\(\) \{\}/);
+assert.match(fightBeast.toString(), /function fightBeast\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
index f0feb6a7442..3730d46d59a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
@@ -9,14 +9,13 @@ dashedName: step-70
 
 Add a third object to the `locations` array. Give it the same properties as the other two objects.
 
-Set `name` to `cave`. Set `button text` to an array with the strings `Fight slime`, `Fight fanged beast`, and `Go to town square`. Set the `button functions` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `You enter the cave. You see some monsters.`.
+Set `name` to `cave`. Set `button text` to an array with the strings `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`. Set the `"button functions"` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `"You enter the cave. You see some monsters."`.
 
 # --hints--
 
 You should have three values in your `locations` array.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 3);
 ```
 
@@ -26,19 +25,19 @@ Your third `locations` value should be an object.
 assert.isObject(locations[2]);
 ```
 
-Your third `locations` object should have a `name` property with the value of `cave`.
+Your third `locations` object should have a `name` property with the value of `"cave"`.
 
 ```js
 assert.equal(locations[2].name, "cave");
 ```
 
-Your third `locations` object should have a `button text` property which is an array.
+Your third `locations` object should have a `"button text"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button text"]);
 ```
 
-Your `button text` property should have the string values `Fight slime`, `Fight fanged beast`, and `Go to town square`.
+Your `"button text"` property should have the string values `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[2]["button text"][0], "Fight slime");
@@ -46,13 +45,13 @@ assert.equal(locations[2]["button text"][1], "Fight fanged beast");
 assert.equal(locations[2]["button text"][2], "Go to town square");
 ```
 
-Your third `locations` object should have a `button functions` property which is an array.
+Your third `locations` object should have a `"button functions"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button functions"]);
 ```
 
-Your `button functions` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
+Your `"button functions"` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
 
 ```js
 assert.equal(locations[2]["button functions"][0], fightSlime);
@@ -66,7 +65,7 @@ assert.equal(locations[2]["button functions"][2], goTown);
 assert.isString(locations[2].text);
 ```
 
-Your third `locations` object should have a `text` property with the value of `You enter the cave. You see some monsters.`.
+Your third `locations` object should have a `text` property with the value of `"You enter the cave. You see some monsters."`.
 
 ```js
 assert.equal(locations[2].text, "You enter the cave. You see some monsters.");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
index c714f08fc4a..de8ca8be2e2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
@@ -7,7 +7,7 @@ dashedName: step-71
 
 # --description--
 
-Now that you have a `cave` location object, update your `goCave` function to call `update` and pass that new `cave` location. Remember that this is the third element in your `locations` array.
+Now that you have a `"cave"` location object, update your `goCave` function to call `update` and pass that new `"cave"` location. Remember that this is the third element in your `locations` array.
 
 Don't forget to remove your `console.log` call!
 
@@ -16,19 +16,19 @@ Don't forget to remove your `console.log` call!
 You should use bracket notation to access the third element in your `locations` array.
 
 ```js
-assert.match(code, /locations\[2\]/);
+assert.match(code, /locations\s*\[\s*2\s*\]/);
 ```
 
 You should pass the third element in your `locations` array to `update`.
 
 ```js
-assert.match(code, /update\(locations\[2\]\)/);
+assert.match(code, /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 You should call `update` with the third element in your `locations` array in your `goCave` function.
 
 ```js
-assert.match(goCave.toString(), /update\(locations\[2\]\)/);
+assert.match(goCave.toString(), /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 You should not have the `console.log` statement in your `goCave` function.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
index 4d1dbe391b0..93be9c07f85 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
@@ -7,7 +7,7 @@ dashedName: step-72
 
 # --description--
 
-Now that your `store` and `cave` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
+Now that your `"store"` and `"cave"` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
 
 For example, here is how you would set `num` equal to `5` less than `num`: `num = num - 5;`.
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
index 42dbcd9d574..3fda1395a8c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
@@ -19,7 +19,7 @@ const total = document.querySelector('#total');
 total.innerText = value;
 ```
 
-You can test this by clicking your "Go to store" button, followed by your "Buy Health" button.
+You can test this by clicking your `"Go to store"` button, followed by your `"Buy Health"` button.
 
 **Note:** Your answer should only be two lines of code.
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
index 55a30a76fa0..bd39c41b2b3 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
@@ -7,17 +7,20 @@ dashedName: step-76
 
 # --description--
 
-ماذا لو لم يكن لدى اللاعب ما يكفي من الذهب (gold) لشراء الصحة (health)؟ عندما تريد تشغيل الكود بشروط معيَّنة، يمكنك استخدام تعبير `if`. ضع كل الكود في وظيفة `buyHealth` داخل تعبير `if`. على سبيل المثال:
+ماذا لو لم يكن لدى اللاعب ما يكفي من الذهب (gold) لشراء الصحة (health)؟ When you want to run code conditionally, you can use the <dfn>if</dfn> statement.
+
+An `if` statement is used to make decisions in code. The keyword `if` is followed by a condition in parentheses. If the condition is true, the code inside the curly braces `{}` is executed. If the condition is false, the code inside the curly braces is skipped.
+
+Here is an example of an `if` statement:
 
 ```js
-function myFunction() {
-  if ("condition") {
-    console.log("Hello World!");
-  }
+const num = 5;
+if (num >= 3) {
+  console.log("This code will run because num is greater than or equal to 3.");
 }
 ```
 
-For now, the `if` statement condition should be set to the string `condition` as a placeholder.
+Start by placing all of the code in your `buyHealth` function inside an `if` statement. For the `if` statement condition, check if `gold` is greater than or equal to `10`.
 
 # --hints--
 
@@ -27,16 +30,16 @@ Your `buyHealth` function should have an `if` statement.
 assert.match(buyHealth.toString(), /if/);
 ```
 
-Your `if` statement should have the string `condition` for the condition.
+Your `if` statement should check if `gold` is greater than or equal to `10`.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)/);
 ```
 
 All of your `buyHealth` code should be inside the `if` statement.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)\s*\{[\s\S]*\}/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)\s*{\s*gold\s*-=\s*10;\s*health\s*\+=\s*10;\s*goldText\.innerText\s*=\s*gold;\s*healthText\.innerText\s*=\s*health;\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
index 403da825182..051ddd2f2d7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c5db7888af27af23f0dd
-title: الخطوة 78
+title: Step 77
 challengeType: 0
-dashedName: step-78
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
index 22e1b895ea1..1498e6c09c4 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8c65b75664c28a8e59c16
-title: الخطوة 79
+title: Step 78
 challengeType: 0
-dashedName: step-79
+dashedName: step-78
 ---
 
 # --description--
 
-Inside the `else` statement, set `text.innerText` to equal `You do not have enough gold to buy health.`.
+Inside the `else` statement, set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 # --hints--
 
-Your `buyHealth` function should set `text.innerText` to equal `You do not have enough gold to buy health.`.
+Your `buyHealth` function should set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 ```js
 assert.match(buyHealth.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy health\.\1/);
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
index 90e408f18ac..f38b4906897 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c6815f5f1a29735efe1b
-title: الخطوة 80
+title: Step 79
 challengeType: 0
-dashedName: step-80
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
index bf134af9315..b2dc007106e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c7322e42962ad53ad204
-title: الخطوة 81
+title: Step 80
 challengeType: 0
-dashedName: step-81
+dashedName: step-80
 ---
 
 # --description--
 
-Just like your `locations` array, your `weapons` array will hold objects. Add four objects to the `weapons` array, each with two properties: `name` and `power`. The first should have the `name` set to `stick` and the `power` set to `5`. The second should be `dagger` and `30`. The third, `claw hammer` and `50`. The fourth, `sword` and `100`.
+Just like your `locations` array, your `weapons` array will hold objects. Add four objects to the `weapons` array, each with two properties: `name` and `power`. The first should have the `name` set to `"stick"` and the `power` set to `5`. The second should be `"dagger"` and `30`. The third, `"claw hammer"` and `50`. The fourth, `"sword"` and `100`.
 
 # --hints--
 
@@ -26,28 +26,28 @@ assert.isObject(weapons[2]);
 assert.isObject(weapons[3]);
 ```
 
-Your first `weapons` object should have the `name` set to `stick` and the `power` set to `5`.
+Your first `weapons` object should have the `name` set to `"stick"` and the `power` set to `5`.
 
 ```js
 assert.equal(weapons[0].name, 'stick');
 assert.equal(weapons[0].power, 5);
 ```
 
-Your second `weapons` object should have the `name` set to `dagger` and the `power` set to `30`.
+Your second `weapons` object should have the `name` set to `"dagger"` and the `power` set to `30`.
 
 ```js
 assert.equal(weapons[1].name, 'dagger');
 assert.equal(weapons[1].power, 30);
 ```
 
-Your third `weapons` object should have the `name` set to `claw hammer` and the `power` set to `50`.
+Your third `weapons` object should have the `name` set to `"claw hammer"` and the `power` set to `50`.
 
 ```js
 assert.equal(weapons[2].name, 'claw hammer');
 assert.equal(weapons[2].power, 50);
 ```
 
-Your fourth `weapons` object should have the `name` set to `sword` and the `power` set to `100`.
+Your fourth `weapons` object should have the `name` set to `"sword"` and the `power` set to `100`.
 
 ```js
 assert.equal(weapons[3].name, 'sword');
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
index 455f57b86d0..dd8e2a5d9ec 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c7a59e72c02bb1c717d2
-title: الخطوة 82
+title: Step 81
 challengeType: 0
-dashedName: step-82
+dashedName: step-81
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.include(buyWeapon.toString(), 'if');
 Your `if` statement should check if `gold` is greater than or equal to `30`.
 
 ```js
-assert.match(buyWeapon.toString(), /if\s*\(gold\s*>=\s*30\)/);
+assert.match(buyWeapon.toString(), /if\s*\(\s*gold\s*>=\s*30\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
index 08928a6e1c1..570844fee8c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c89e4272512d44fc1c66
-title: الخطوة 83
+title: Step 82
 challengeType: 0
-dashedName: step-83
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
index 7d79d7a494e..acdc8838246 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c8cee8e5cf2e001789b4
-title: الخطوة 84
+title: Step 83
 challengeType: 0
-dashedName: step-84
+dashedName: step-83
 ---
 
 # --description--
 
-تتوافق قيمة المتغير `currentWeapon` مع رقم الترتيب في قائمة `weapons`. The player starts with a `stick`, since `currentWeapon` starts at `0` and `weapons[0]` is the `stick` weapon.
+تتوافق قيمة المتغير `currentWeapon` مع رقم الترتيب في قائمة `weapons`. The player starts with a `"stick"`, since `currentWeapon` starts at `0` and `weapons[0]` is the `"stick"` weapon.
 
 In the `buyWeapon` function, use compound assignment to add `1` to `currentWeapon` - the user is buying the next weapon in the `weapons` array.
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
index a1b866479b2..c2b63fbfcee 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ca22d29fe62f3952bdf5
-title: الخطوة 85
+title: Step 84
 challengeType: 0
-dashedName: step-85
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
index f7e5b4c5824..8ebcf334d01 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8cb19bd7f8a304e5427a1
-title: الخطوة 86
+title: Step 85
 challengeType: 0
-dashedName: step-86
+dashedName: step-85
 ---
 
 # --description--
 
-Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `You now have a new weapon.`.
+Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `"You now have a new weapon."`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should update the `innerText` property of the `goldText` element to be `gold
 assert.match(buyWeapon.toString(), /goldText\.innerText\s*=\s*gold/);
 ```
 
-You should update the `innerText` property of the `text` element to be `You now have a new weapon.`.
+You should update the `innerText` property of the `text` element to be `"You now have a new weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a new weapon\.\1/);
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
index 7012abb4265..81ebba26eab 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cbd1e3595431d5a2b3f1
-title: الخطوة 87
+title: Step 86
 challengeType: 0
-dashedName: step-87
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
index b2470ff9bfa..a55298fd7e8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cce1b0c32c33017cf2e9
-title: الخطوة 88
+title: Step 87
 challengeType: 0
-dashedName: step-88
+dashedName: step-87
 ---
 
 # --description--
@@ -22,7 +22,7 @@ let value = array[index];
 You should update `newWeapon` to have the value of `weapons[currentWeapon]`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
index 0af92dbf644..af0ce0a447a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ce1dfc990134162b3bd9
-title: الخطوة 89
+title: Step 88
 challengeType: 0
-dashedName: step-89
+dashedName: step-88
 ---
 
 # --description--
@@ -14,7 +14,7 @@ dashedName: step-89
 You should update `newWeapon` to have the value of `weapons[currentWeapon].name`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]\.name;/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
index 2945f659767..a06ea68706d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8ce73d0dce43468f6689c
-title: الخطوة 90
+title: Step 89
 challengeType: 0
-dashedName: step-90
+dashedName: step-89
 ---
 
 # --description--
 
-You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `You now have a new weapon.` string to say `You now have a` and the name of the new weapon. Remember to end the sentence with a period.
+You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `"You now have a new weapon."` string to say `"You now have a "` and the name of the new weapon. Remember to end the sentence with a period.
 
-Here is an example that creates the string `Hello, our name is freeCodeCamp.`:
+Here is an example that creates the string `"Hello, our name is freeCodeCamp."`:
 
 ```js
 const ourName = "freeCodeCamp";
@@ -18,7 +18,7 @@ const ourStr = "Hello, our name is " + ourName + ".";
 
 # --hints--
 
-You should update the `text.innerText` assignment to start with the string `You now have a`.
+You should update the `text.innerText` assignment to start with the string `"You now have a "`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a \1/);
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
index cc862730454..4f2ed89e0ac 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cf22272d6d35af80d4ac
-title: الخطوة 91
+title: Step 90
 challengeType: 0
-dashedName: step-91
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
index 47fd633655b..fddaa343d3b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d0337d7c67377a4a76c6
-title: الخطوة 92
+title: Step 91
 challengeType: 0
-dashedName: step-92
+dashedName: step-91
 ---
 
 # --description--
 
 Up until now, any time `text.innerText` was updated, the old text was erased. This time, use the `+=` operator to add text to the end of `text.innerText`.
 
-Add the string `In your inventory you have:` - include the spaces at the beginning and the end.
+Add the string `" In your inventory you have: "` - include the spaces at the beginning and the end.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should use the `+=` operator to add to `text.innerText`.
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*/)
 ```
 
-You should add the string `In your inventory you have:` to the end of `text.innerText`. Mind the spaces!
+You should add the string `" In your inventory you have: "` to the end of `text.innerText`. Mind the spaces!
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
index 83a7274cb86..d2d697233c5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d08668fa8b38732486e9
-title: الخطوة 93
+title: Step 92
 challengeType: 0
-dashedName: step-93
+dashedName: step-92
 ---
 
 # --description--
@@ -11,7 +11,7 @@ At the end of the second `text.innerText` string you just added, use the concate
 
 # --hints--
 
-You should not change the `In your inventory you have:` string.
+You should not change the `" In your inventory you have: "` string.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
index 18e8e893a20..08f3472f27d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d0c4f12c2239b6618582
-title: الخطوة 94
+title: Step 93
 challengeType: 0
-dashedName: step-94
+dashedName: step-93
 ---
 
 # --description--
 
-Add an `else` statement to your `buyWeapon` function. In that statement, set `text.innerText` to equal `You do not have enough gold to buy a weapon.`.
+Add an `else` statement to your `buyWeapon` function. In that statement, set `text.innerText` to equal `"You do not have enough gold to buy a weapon."`.
 
 # --hints--
 
@@ -24,13 +24,13 @@ const split = buyWeapon.toString().split(/\s|\n/);
 assert.isAbove(split.indexOf('else'), split.indexOf('if'));
 ```
 
-You should set `text.innerText` to `You do not have enough gold to buy a weapon.`.
+You should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy a weapon.\1/);
 ```
 
-Your `else` statement should set `text.innerText` to `You do not have enough gold to buy a weapon.`.
+Your `else` statement should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 gold = 20;
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
index b650b6ee138..b8fe5b50826 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d0fdf2dad83a92883a80
-title: الخطوة 95
+title: Step 94
 challengeType: 0
-dashedName: step-95
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
index 18d0e060f13..0814d277818 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d143f2a58e3b6d6e9c33
-title: الخطوة 96
+title: Step 95
 challengeType: 0
-dashedName: step-96
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
index 4e51a43192e..821369edf60 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d1c72e8bb13c2074d93c
-title: الخطوة 97
+title: Step 96
 challengeType: 0
-dashedName: step-97
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
index 743922baa9c..5b21812459f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d2146a3e853d0a6e28ca
-title: الخطوة 98
+title: Step 97
 challengeType: 0
-dashedName: step-98
+dashedName: step-97
 ---
 
 # --description--
 
-Add an `else` statement for your outer `if` statement. Inside this new `else` statement, set `text.innerText` to `You already have the most powerful weapon!`.
+Add an `else` statement for your outer `if` statement. Inside this new `else` statement, set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 # --hints--
 
@@ -18,13 +18,13 @@ const matches = buyWeapon.toString().match(/else/g);
 assert.equal(matches.length, 2);
 ```
 
-You should set `text.innerText` to `You already have the most powerful weapon!`.
+You should set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 ```js
 assert.match(buyWeapon.toString(), /('|")You already have the most powerful weapon!\1/);
 ```
 
-You should modify your `text.innerText` to `You already have the most powerful weapon!` within your outer `else` statement.
+You should modify your `text.innerText` to `"You already have the most powerful weapon!"` within your outer `else` statement.
 
 ```js
 currentWeapon = 5;
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
index 79141373ac1..8adbb83ea32 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d24c97461b3ddb9397c8
-title: الخطوة 99
+title: Step 98
 challengeType: 0
-dashedName: step-99
+dashedName: step-98
 ---
 
 # --description--
 
 Once a player has the most powerful weapon, you can give them the ability to sell their old weapons.
 
-In the outer `else` statement, set `button2.innerText` to `Sell weapon for 15 gold`. Also set `button2.onclick` to the function name `sellWeapon`.
+In the outer `else` statement, set `button2.innerText` to `"Sell weapon for 15 gold"`. Also set `button2.onclick` to the function name `sellWeapon`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should set the value of `button2.innerText`.
 assert.match(buyWeapon.toString(), /button2\.innerText/);
 ```
 
-You should set the value of `button2.innerText` to `Sell weapon for 15 gold`.
+You should set the value of `button2.innerText` to `"Sell weapon for 15 gold"`.
 
 ```js
 assert.match(buyWeapon.toString(), /button2\.innerText\s*=\s*('|")Sell weapon for 15 gold\1;/);
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
index 031cd1bd3df..f239b5e07bb 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d2e2a073be3edb46116f
-title: الخطوة 100
+title: Step 99
 challengeType: 0
-dashedName: step-100
+dashedName: step-99
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.isFunction(sellWeapon);
 `sellWeapon` should be an empty function.
 
 ```js
-assert.match(sellWeapon.toString(), /sellWeapon\(\)\s*\{\s*\}/);
+assert.match(sellWeapon.toString(), /sellWeapon\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
index e53fbc1aba3..3cf081b462d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d31ebbc10e3fe1b28e03
-title: الخطوة 101
+title: Step 100
 challengeType: 0
-dashedName: step-101
+dashedName: step-100
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(sellWeapon.toString(), /if/);
 Your `if` statement should check if `inventory.length` is greater than `1`.
 
 ```js
-assert.match(sellWeapon.toString(), /if\s*\(inventory\.length\s*>\s*1\)/);
+assert.match(sellWeapon.toString(), /if\s*\(\s*inventory\.length\s*>\s*1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
index f748b46ae93..1aa870dcd42 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d35660db4040ba292193
-title: الخطوة 102
+title: Step 101
 challengeType: 0
-dashedName: step-102
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
index b7e1817a271..c9a8d067c6f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d382cd075f4169223e14
-title: الخطوة 103
+title: Step 102
 challengeType: 0
-dashedName: step-103
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
index 38586ee5bec..e6174703f8c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d539dc11cb42b5dd7ec8
-title: الخطوة 104
+title: Step 103
 challengeType: 0
-dashedName: step-104
+dashedName: step-103
 ---
 
 # --description--
@@ -21,19 +21,19 @@ Use the `shift()` method to take the first element from the `inventory` array an
 Your `sellWeapon` function should use the `shift()` method.
 
 ```js
-assert.match(sellWeapon.toString(), /shift\(\)/);
+assert.match(sellWeapon.toString(), /shift\(\s*\)/);
 ```
 
 You should use the `shift()` method on the `inventory` array.
 
 ```js
-assert.match(sellWeapon.toString(), /inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /inventory\.shift\(\s*\)/);
 ```
 
 You should assign the value of `inventory.shift()` to your `currentWeapon` variable.
 
 ```js
-assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
index ea5ca7367c8..9b5f9e125ed 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d61ddfe35744369365b7
-title: الخطوة 105
+title: Step 104
 challengeType: 0
-dashedName: step-105
+dashedName: step-104
 ---
 
 # --description--
 
-After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `You sold a`, then `currentWeapon`, then the string `.`.
+After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `"You sold a "`, then `currentWeapon`, then the string `"."`.
 
 # --hints--
 
@@ -17,19 +17,19 @@ You should use the assignment operator with `text.innerText`.
 assert.match(sellWeapon.toString(), /text\.innerText\s*=/);
 ```
 
-You should add `You sold a` to `text.innerText`. Spacing is important.
+You should add `"You sold a "` to `text.innerText`. Spacing is important.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1/);
 ```
 
-You should add the value of `currentWeapon` to the `You sold a` string. Use the concatenation operator to do this on the same line.
+You should add the value of `currentWeapon` to the `"You sold a "` string. Use the concatenation operator to do this on the same line.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a\s\1\s*\+\s*\_currentWeapon/);
 ```
 
-You should add the string `.` to the value of `currentWeapon`. Use the concatenation operator to do this on the same line.
+You should add the string `"."` to the value of `currentWeapon`. Use the concatenation operator to do this on the same line.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1\s*\+\s*\_currentWeapon\s+\+\s+('|")\.\2/);
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
index a9f40531039..59c6c536b8b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d6c7001ebc45350e3d16
-title: الخطوة 106
+title: Step 105
 challengeType: 0
-dashedName: step-106
+dashedName: step-105
 ---
 
 # --description--
 
-Now use the `+=` operator to add the string `In your inventory you have:` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `In your inventory you have:` string.
+Now use the `+=` operator to add the string `" In your inventory you have: "` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `" In your inventory you have: "` string.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const matches = sellWeapon.toString().match(/text\.innerText\s*\+=/g);
 assert.equal(matches.length, 1);
 ```
 
-You should add the string `In your inventory you have:` to the second `text.innerText` line. Spacing matters.
+You should add the string `" In your inventory you have: "` to the second `text.innerText` line. Spacing matters.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*\+=\s*('|") In your inventory you have: \1/);
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
index 4cf28305a2e..c7dfa1f9628 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d7b8ab568b4649998954
-title: الخطوة 107
+title: Step 106
 challengeType: 0
-dashedName: step-107
+dashedName: step-106
 ---
 
 # --description--
 
-Use an `else` statement to run when the `inventory` length is not more than one. Set the `text.innerText` to say `Don't sell your only weapon!`.
+Use an `else` statement to run when the `inventory` length is not more than one. Set the `text.innerText` to say `"Don't sell your only weapon!"`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ Your `sellWeapon` function should have an `else` statement.
 assert.match(sellWeapon.toString(), /else/);
 ```
 
-You should set `text.innerText` to `Don't sell your only weapon!`.
+You should set `text.innerText` to `"Don't sell your only weapon!"`.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")Don't sell your only weapon!\1/);
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
index fd9b671de40..a8068715efb 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d81f539f004776dd9b1e
-title: الخطوة 108
+title: Step 107
 challengeType: 0
-dashedName: step-108
+dashedName: step-107
 ---
 
 # --description--
 
 Now you can start the code to fight monsters. To keep your code organized, your `fightDragon` function has been moved for you to be near the other `fight` functions.
 
-Below your `weapons` array, define a `monsters` variable and assign it an array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. The first object's values should be `slime`, `2`, and `15`, in order. The second should be `fanged beast`, `8`, and `60`. The third should be `dragon`, `20`, and `300`.
+Below your `weapons` array, define a `monsters` variable and assign it an array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. The first object's values should be `"slime"`, `2`, and `15`, in order. The second should be `"fanged beast"`, `8`, and `60`. The third should be `"dragon"`, `20`, and `300`.
 
 # --hints--
 
@@ -37,7 +37,7 @@ Your `monsters` array should have 3 objects.
 assert(monsters.every(val => typeof val === "object"));
 ```
 
-The first value in your `monsters` array should be an object with a `name` property set to `slime`.
+The first value in your `monsters` array should be an object with a `name` property set to `"slime"`.
 
 ```js
 assert.equal(monsters[0].name, "slime");
@@ -55,7 +55,7 @@ The first value in your `monsters` array should be an object with a `health` pro
 assert.equal(monsters[0].health, 15);
 ```
 
-The second value in your `monsters` array should be an object with a `name` property set to `fanged beast`.
+The second value in your `monsters` array should be an object with a `name` property set to `"fanged beast"`.
 
 ```js
 assert.equal(monsters[1].name, "fanged beast");
@@ -73,7 +73,7 @@ The second value in your `monsters` array should be an object with a `health` pr
 assert.equal(monsters[1].health, 60);
 ```
 
-The third value in your `monsters` array should be an object with a `name` property set to `dragon`.
+The third value in your `monsters` array should be an object with a `name` property set to `"dragon"`.
 
 ```js
 assert.equal(monsters[2].name, "dragon");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
index d89cf968429..f21aeb538fa 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd468debb449b4454086
-title: الخطوة 109
+title: Step 108
 challengeType: 0
-dashedName: step-109
+dashedName: step-108
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
index 907ade1bb37..f2a071ee77d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd9cdb16324b04cfd958
-title: الخطوة 110
+title: Step 109
 challengeType: 0
-dashedName: step-110
+dashedName: step-109
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.notMatch(fightSlime.toString(), /let|const/);
 You should call the `goFight` function.
 
 ```js
-assert.match(fightSlime.toString(), /goFight\(\);/);
+assert.match(fightSlime.toString(), /goFight\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
index d5322c3b44b..dff775b563a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8dfcf7fb1044d2f478fd1
-title: الخطوة 111
+title: Step 110
 challengeType: 0
-dashedName: step-111
+dashedName: step-110
 ---
 
 # --description--
 
-Following the same pattern, use that code in the `fightBeast` and `fightDragon` functions. Remember that `beast` is at index `1` and `dragon` is at index `2`. Also, remove the `console.log` call from your `fightDragon` function.
+Following the same pattern as the `fightSlime` function, use that code in the `fightBeast` and `fightDragon` functions. Remember that `beast` is at index `1` and `dragon` is at index `2`. Also, remove the `console.log` call from your `fightDragon` function.
 
 # --hints--
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
index b4301e3e124..fa62f97c4f9 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e0d1d0110b4ec421489f
-title: الخطوة 112
+title: Step 111
 challengeType: 0
-dashedName: step-112
+dashedName: step-111
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
index 3b29a930d24..9ff3ee038cb 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
@@ -1,20 +1,19 @@
 ---
 id: 62a8e142f7f0bd4fed898de3
-title: الخطوة 113
+title: Step 112
 challengeType: 0
-dashedName: step-113
+dashedName: step-112
 ---
 
 # --description--
 
-Add a new object to the end of the `locations` array, following the same properties as the rest of the objects. Set `name` to `fight`, `button text` to an array with `Attack`, `Dodge`, and `Run`, `button functions` to an array with `attack`, `dodge`, and `goTown`, and `text` to `You are fighting a monster.`.
+Add a new object to the end of the `locations` array, following the same properties as the rest of the objects. Set `name` to `"fight"`, `"button text"` to an array with `"Attack"`, `"Dodge"`, and `"Run"`, `"button functions"` to an array with `attack`, `dodge`, and `goTown`, and `text` to `"You are fighting a monster."`.
 
 # --hints--
 
 Your `locations` array should have 4 values in it.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 4);
 ```
 
@@ -24,25 +23,25 @@ Your new value should be an object.
 assert.isObject(locations[3]);
 ```
 
-Your new object should have a `name` property set to `fight`.
+Your new object should have a `name` property set to `"fight"`.
 
 ```js
 assert.equal(locations[3].name, "fight");
 ```
 
-Your new object should have a `button text` property set to an array with the strings `Attack`, `Dodge`, and `Run`.
+Your new object should have a `"button text"` property set to an array with the strings `"Attack"`, `"Dodge"`, and `"Run"`.
 
 ```js
 assert.deepEqual(locations[3]["button text"], ["Attack", "Dodge", "Run"]);
 ```
 
-Your new object should have a `button functions` property set to an array with the variables `attack`, `dodge`, and `goTown`.
+Your new object should have a `"button functions"` property set to an array with the variables `attack`, `dodge`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[3]["button functions"], [attack, dodge, goTown]);
 ```
 
-Your new object should have a `text` property set to `You are fighting a monster.`.
+Your new object should have a `text` property set to `"You are fighting a monster."`.
 
 ```js
 assert.equal(locations[3].text, "You are fighting a monster.");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
index d23bd002df4..1a6b6592b70 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e1dc897df55108bcb5e8
-title: الخطوة 114
+title: Step 113
 challengeType: 0
-dashedName: step-114
+dashedName: step-113
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(goFight.toString(), /update/);
 You should pass the fourth object in your `locations` array to your `update` call.
 
 ```js
-assert.match(goFight.toString(), /update\(locations\[3\]\)/);
+assert.match(goFight.toString(), /update\(\s*locations\s*\[\s*3\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
index ef09a9b2b89..2e11e5e73a1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e21398ad61520edb724f
-title: الخطوة 115
+title: Step 114
 challengeType: 0
-dashedName: step-115
+dashedName: step-114
 ---
 
 # --description--
@@ -14,13 +14,13 @@ Below your `update` call, set the `monsterHealth` to be the health of the curren
 You should use bracket notation to access the `monsters` array at the `fighting` index.
 
 ```js
-assert.match(goFight.toString(), /monsters\[fighting\]/);
+assert.match(goFight.toString(), /monsters\s*\[\s*fighting\s*\]/);
 ```
 
 You should assign the value of `monsters[fighting]` to the `monsterHealth` variable.
 
 ```js
-assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\[fighting\](\.health|\[('|")health\2\])/);
+assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\s*\[\s*fighting\s*\]\s*(\.health|\[\s*('|")health\2\s*\])/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
index c31375e84d4..95754b15eba 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
@@ -1,18 +1,25 @@
 ---
 id: 62a8e24c673b075317cc0b09
-title: الخطوة 116
+title: Step 115
 challengeType: 0
-dashedName: step-116
+dashedName: step-115
 ---
 
 # --description--
 
-The HTML element that shows the monster's stats has been hidden with CSS. Display the `monsterStats` element by updating the `display` property of the `style` property to `block`. For example, updating the `first` property of the `name` property of `user` would look like:
+By default, the HTML element that shows the monster's stats has been hidden with CSS. When the player clicks the "Fight dragon" button, the monster's stats should be displayed. You can accomplish this by using the <dfn>style</dfn> and <dfn>display</dfn> properties on the `monsterStats` element.
+
+The `style` property is used to access the inline style of an element and the `display` property is used to set the visibility of an element.
+
+Here is an example of how to update the display for a paragraph element:
 
 ```js
-user.name.first = "Naomi";
+const paragraph = document.querySelector('p');
+paragraph.style.display = 'block';
 ```
 
+Display the `monsterStats` element by updating the `display` property of the `style` property to `block`.
+
 # --hints--
 
 You should use dot notation to access the `style` property of `monsterStats`.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
index aa2108ff6bd..8629818b67e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e271f8e3d1541f9624ad
-title: الخطوة 117
+title: Step 116
 challengeType: 0
-dashedName: step-117
+dashedName: step-116
 ---
 
 # --description--
 
-Now, set the `innerText` property of `monsterName` to be the `name` property of the current monster. Do the same for `monsterHealthText` and the `health` property.
+Now, you will need to update the text for the current monster's name and health.
+
+Start by assigning `monsters[fighting].name` to the `innerText` property of `monsterName`. Then, assign `monsterHealth` to the `innerText` property of `monsterHealthText`.
 
 # --hints--
 
@@ -17,10 +19,10 @@ You should use dot notation to access the `innerText` property of `monsterName`.
 assert.match(goFight.toString(), /monsterName\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterName` to be the `name` value of the current monster. Remember that you can get the current monster with `monsters[fighting]`.
+You should assign `monsters[fighting].name` to `monsterName.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\[fighting\]\.name/);
+assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 You should use dot notation to access the `innerText` property of `monsterHealthText`.
@@ -29,10 +31,10 @@ You should use dot notation to access the `innerText` property of `monsterHealth
 assert.match(goFight.toString(), /monsterHealthText\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterHealthText` to be the `health` value of the current monster. You can get the current monster with `monsters[fighting]` or you can access this value using the `monsterHealth` variable that you previously assigned.
+You should assign `monsterHealth` to `monsterHealthText.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\[fighting\]\.health/);
+assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.health/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
index 487cadd6a64..51e16a3cb86 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e35675c18c56354c08cf
-title: الخطوة 118
+title: Step 117
 challengeType: 0
-dashedName: step-118
+dashedName: step-117
 ---
 
 # --description--
 
-Now you can build the `attack` function. First, update the `text` message to say `The <monster name> attacks.`, replacing `<monster name>` with the name of the monster. Remember you can use the concatenation operator for this.
+Now you can build the `attack` function. First, update the `text` message to say `"The <monster name> attacks."`, replacing `<monster name>` with the name of the monster. Remember you can use the concatenation operator for this.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1/);
 You should use the concatenation operator to add the value of `monsters[fighting].name` to the `The` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 You should use the concatenation operator to add the string `attacks.` to the `monsters[fighting].name` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name\s*\+\s*('|") attacks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name\s*\+\s*('|") attacks\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
index c9653b798ca..e062f34ae25 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e41e2f190c58404dd46e
-title: Step 119
+title: Step 118
 challengeType: 0
-dashedName: step-119
+dashedName: step-118
 ---
 
 # --description--
 
-On a new line, add the string `You attack it with your <weapon>.` to the `text` value, replacing `<weapon>` with the player's current weapon.
+On a new line, use the addition assignment operator(`+=`), to add the string `" You attack it with your <weapon>."` to the `text` value, replacing `<weapon>` with the player's current weapon. Additionally, remember that this line of text starts with a space so it will properly display.
 
 # --hints--
 
@@ -24,7 +24,7 @@ You should use compound assignment with `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=/);
 ```
 
-You should add the string `You attack it with your` to the `text.innerText` value. Remember that spacing matters.
+You should add the string `" You attack it with your "` to the `text.innerText` value. Remember that spacing matters.
 
 ```js
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1/);
@@ -33,13 +33,13 @@ assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it wit
 You should use the concatenation operator to add the current weapon to the string. You can get the current weapon with `weapons[currentWeapon].name`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name/);
 ```
 
-You should use the concatenation operator to end your string with `.`.
+You should use the concatenation operator to end your string with `"."`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name\s*\+\s*('|")\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*\+\s*('|")\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
index b361327a46e..689a350b599 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e45cc600c3591cee671a
-title: Step 120
+title: Step 119
 challengeType: 0
-dashedName: step-120
+dashedName: step-119
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(attack.toString(), /health\s*-=/);
 You should subtract the monster's current level from `health`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*monsters\[fighting\]\.level/);
+assert.match(attack.toString(), /health\s*-=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
index edbe68894a5..ac76865ed0a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e49f4df7af5ae2d7a616
-title: Step 121
+title: Step 120
 challengeType: 0
-dashedName: step-121
+dashedName: step-120
 ---
 
 # --description--
 
-Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon. Remember you have the `currentWeapon` variable and the `power` property.
+Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon.
+
+Remember that you can access the power of the player's current weapon using `weapons[currentWeapon].power`.
 
 # --hints--
 
@@ -20,19 +22,19 @@ assert.match(attack.toString(), /monsterHealth\s*-=/);
 You should use bracket notation with `currentWeapon` to access `weapons`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 You should use dot notation to access the `power` property of `weapons[currentWeapon]`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 You should subtract the `power` of the current weapon from `monsterHealth`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
index 7052a0ec1ea..01b05467403 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8e4dc6a60f85bf256a0cb
-title: Step 122
+title: Step 121
 challengeType: 0
-dashedName: step-122
+dashedName: step-121
 ---
 
 # --description--
 
 The `Math` object in JavaScript contains static properties and methods for mathematical constants and functions. One of those is `Math.random()`, which generates a random number from `0` (inclusive) to `1` (exclusive). Another is `Math.floor()`, which rounds a given number down to the nearest integer.
 
-Using these, you can generate a random number within a range. For example, this generates a random number between 1 and 5: `Math.floor(Math.random() * 5) + 1;`.
+Using these, you can generate a random number within a range. For example, this generates a random number between `1` and `5`: `Math.floor(Math.random() * 5) + 1;`.
 
 Following this pattern, use the addition operator (`+`) to add a random number between `1` and the value of `xp` to your `monsterHealth -= weapons[currentWeapon].power`.
 
@@ -24,7 +24,7 @@ assert.lengthOf(attack.toString().match(/monsterHealth/g), 1);
 You should add to the `weapons[currentWeapon].power` value.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+/);
 ```
 
 You should use `Math.floor()`.
@@ -42,25 +42,25 @@ assert.match(attack.toString(), /Math\.random/);
 You should multiply `Math.random()` by the value of `xp`.
 
 ```js
-assert.match(attack.toString(), /Math\.random\(\)\s*\*\s*xp/);
+assert.match(attack.toString(), /Math\.random\(\s*\)\s*\*\s*xp/);
 ```
 
 You should use `Math.floor()` to round the result of `Math.random() * xp` down.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\)\s*\*\s*xp\s*.*\)/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*.*\)/);
 ```
 
 You should add `1` to the result of `Math.floor()`.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 You should add the result of `Math.floor(Math.random() * xp) + 1` to the result of `weapons[currentWeapon].power`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
index d07c342c9ed..4931f15d514 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ed36d7a7915dfa444ba2
-title: Step 123
+title: Step 122
 challengeType: 0
-dashedName: step-123
+dashedName: step-122
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
index 184411b324c..60667347322 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8edd05e27cc668051686f
-title: Step 124
+title: Step 123
 challengeType: 0
-dashedName: step-124
+dashedName: step-123
 ---
 
 # --description--
@@ -20,13 +20,13 @@ assert.match(attack.toString(), /if/);
 Your `if` statement should check if `health` is less than or equal to `0`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(health\s*<=\s*0\)/);
+assert.match(attack.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 ```
 
 Your `if` statement should call the `lose` function.
 
 ```js
-assert.match(attack.toString(), /lose\(\)/);
+assert.match(attack.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
index af64a47f516..881f91fdb2f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee154c8946678775c4a4
-title: Step 125
+title: Step 124
 challengeType: 0
-dashedName: step-125
+dashedName: step-124
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
index 6bbfbde991a..2929ee44bf5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee71f018e968a056d369
-title: Step 126
+title: Step 125
 challengeType: 0
-dashedName: step-126
+dashedName: step-125
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(code, /function\s+defeatMonster/);
 `defeatMonster` should be an empty function.
 
 ```js
-assert.match(defeatMonster.toString(), /defeatMonster\s*\(\)\s*\{\s*\}/);
+assert.match(defeatMonster.toString(), /defeatMonster\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 You should use the `function` keyword to declare `lose`.
@@ -32,7 +32,7 @@ assert.match(code, /function\s+lose/);
 `lose` should be an empty function.
 
 ```js
-assert.match(lose.toString(), /lose\s*\(\)\s*\{\s*\}/);
+assert.match(lose.toString(), /lose\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
index 477c4f7710e..f8f57306b03 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8eec45f77bc69e8775294
-title: Step 127
+title: Step 126
 challengeType: 0
-dashedName: step-127
+dashedName: step-126
 ---
 
 # --description--
 
-Inside the `dodge` function, set `text.innerText` equal to the string `You dodge the attack from the <monster>`. Replace `<monster>` with the name of the monster, using the `name` property.
+Inside the `dodge` function, set `text.innerText` equal to the string `"You dodge the attack from the <monster>"`. Replace `<monster>` with the name of the monster, using the `name` property.
 
 # --hints--
 
-You should assign the string `You dodge the attack from the` to the `text.innerText` property. Remember that spacing matters.
+You should assign the string `"You dodge the attack from the "` to the `text.innerText` property. Remember that spacing matters.
 
 ```js
 assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1/);
@@ -20,7 +20,7 @@ assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack
 You should use the concatenation operator to add the name of the monster to the end of the string. You can get this with `monsters[fighting].name`.
 
 ```js
-assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
index 06490d9093e..e32d3bd0439 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8eefe2e68b66ac563816b
-title: Step 128
+title: Step 127
 challengeType: 0
-dashedName: step-128
+dashedName: step-127
 ---
 
 # --description--
 
-In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. You can get the monster's level with the `level` property.
+In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. Remember you can get the monster's level by using `monsters[fighting].level`.
 
 Here is an example of setting `num` to `num` plus `5` * `8`: `num += 5 * 8`. Use `Math.floor()` to round the result down.
 
@@ -22,13 +22,13 @@ assert.match(defeatMonster.toString(), /gold\s*\+=/);
 You should use `Math.floor()` to round the result of the monster's level times `6.7`.
 
 ```js
-assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\))/);
 ```
 
 You should add the result of `Math.floor(monsters[fighting].level * 6.7)` to `gold`.
 
 ```js
-assert.match(defeatMonster.toString(), /gold\s*\+=\s*(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /gold\s*\+=\s*((Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)))/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
index 3301aa6246b..a23344528d5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef6a52292f6bdca4f6f8
-title: Step 129
+title: Step 128
 challengeType: 0
-dashedName: step-129
+dashedName: step-128
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /xp\s*\+=/);
 You should add the monster's level to `xp`.
 
 ```js
-assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\[fighting\]\.level/);
+assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
index 1170568e396..d573e966cac 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef8f0c76a46cd221a68c
-title: Step 130
+title: Step 129
 challengeType: 0
-dashedName: step-130
+dashedName: step-129
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
index fd123524213..4a948c96439 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8efb0e3ce826db8daf80f
-title: Step 131
+title: Step 130
 challengeType: 0
-dashedName: step-131
+dashedName: step-130
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /update/);
 You should pass `locations[4]` as the argument.
 
 ```js
-assert.match(defeatMonster.toString(), /update\(locations\[4\]\)/);
+assert.match(defeatMonster.toString(), /update\(\s*locations\s*\[\s*4\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
index db2c7c81425..76fd64bb570 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8eff21c0b0f6ebe5b8e38
-title: Step 132
+title: Step 131
 challengeType: 0
-dashedName: step-132
+dashedName: step-131
 ---
 
 # --description--
 
 Your `locations` array doesn't have a fifth element, so `locations[4]` doesn't work.
 
-Add a new object at the end of the `locations` array, following the same structure as the other objects. Set `name` to `kill monster`, set `button text` to an array with three `Go to town square` strings, set `button functions` to an array with three `goTown` variables, and set `text` to `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Add a new object at the end of the `locations` array, following the same structure as the other objects. Set `name` to `"kill monster"`, set `"button text"` to an array with three `"Go to town square"` strings, set `"button functions"` to an array with three `goTown` variables, and set `text` to `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 # --hints--
 
@@ -25,25 +25,25 @@ Your fifth `locations` value should be an object.
 assert.isObject(locations[4]);
 ```
 
-Your fifth `locations` value should have a `name` property with the value `kill monster`.
+Your fifth `locations` value should have a `name` property with the value `"kill monster"`.
 
 ```js
 assert.equal(locations[4].name, 'kill monster');
 ```
 
-Your fifth `locations` value should have a `button text` array with three `Go to town square` strings.
+Your fifth `locations` value should have a `"button text"` array with three `"Go to town square"` strings.
 
 ```js
 assert.deepEqual(locations[4]["button text"], ['Go to town square', 'Go to town square', 'Go to town square']);
 ```
 
-Your fifth `locations` value should have a `button functions` array with three `goTown` variables.
+Your fifth `locations` value should have a `"button functions"` array with three `goTown` variables.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, goTown]);
 ```
 
-Your fifth `locations` value should have a `text` property with the value `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Your fifth `locations` value should have a `text` property with the value `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams Arg! as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
index 6209dc3d35d..42320970f45 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8f06fb318666fef69f91e
-title: Step 133
+title: Step 132
 challengeType: 0
-dashedName: step-133
+dashedName: step-132
 ---
 
 # --description--
 
-The word `Arg!` should have quotes around it. Besides escaping quotes, there is another way you can include quotation marks inside a string.
+The word `"Arg!"` should have quotes around it. Besides escaping quotes, there is another way you can include quotation marks inside a string.
 
-Change the double quotes around the string `The monster screams Arg! as it dies. You gain experience points and find gold.` to single quotes `'`, then add double quotes around `Arg!`.
+Change the double quotes around the string `"The monster screams Arg! as it dies. You gain experience points and find gold."` to single quotes `'`, then add double quotes around `"Arg!"`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should use single quotes around the string.
 assert.match(code, /'The monster screams "?Arg!"? as it dies. You gain experience points and find gold.'/);
 ```
 
-You should use double quotes around `Arg!`.
+You should use double quotes around `"Arg!"`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams "Arg!" as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
index d3d163e5feb..9137e403c0b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f14fe6d1fc72454648c7
-title: Step 134
+title: Step 133
 challengeType: 0
-dashedName: step-134
+dashedName: step-133
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
index 27cfddf7384..9d984dbb5a9 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f1d5f5ddbf74c07f733b
-title: Step 135
+title: Step 134
 challengeType: 0
-dashedName: step-135
+dashedName: step-134
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(lose.toString(), /update\(/);
 Your `update` function should have `locations[5]` for the argument.
 
 ```js
-assert.match(lose.toString(), /update\(locations\[5\]\)/);
+assert.match(lose.toString(), /update\(\s*locations\s*\[\s*5\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
index 9947c835faa..a4d22989a7e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f20463b324759953edad
-title: Step 136
+title: Step 135
 challengeType: 0
-dashedName: step-136
+dashedName: step-135
 ---
 
 # --description--
@@ -45,7 +45,7 @@ Your `restart` function should set `currentWeapon` to `0`.
 assert.match(restart.toString(), /currentWeapon\s*=\s*0/);
 ```
 
-Your `restart` function should set `inventory` to an array with the string `stick`.
+Your `restart` function should set `inventory` to an array with the string `"stick"`.
 
 ```js
 assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
@@ -54,7 +54,7 @@ assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
 Your `restart` function should call the `goTown()` function.
 
 ```js
-assert.match(restart.toString(), /goTown\(\)/);
+assert.match(restart.toString(), /goTown\(\s*\)/);
 ```
 
 You should set `goldText.innerText` to the value of `gold`.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
index 35c1b321145..6e05e05b776 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f256b813a476cae51f49
-title: Step 138
+title: Step 137
 challengeType: 0
-dashedName: step-138
+dashedName: step-137
 ---
 
 # --description--
@@ -41,7 +41,7 @@ You should call the `winGame` function in your `if` block.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\)(\s*\})?/);
+assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\s*\)(\s*\})?/);
 ```
 
 You should add an `else` block.
@@ -55,7 +55,7 @@ Your `else` block should call the `defeatMonster` function.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\)(\s*\})?/);
+assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\s*\)(\s*\})?/);
 ```
 
 # --seed--
@@ -220,7 +220,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
index 095200ed56e..a43ddc6b3af 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
@@ -20,7 +20,7 @@ assert.match(code, /function\s+winGame/);
 Your `winGame` function should call the `update` function and pass in `locations[6]`.
 
 ```js
-assert.match(winGame.toString(), /update\s*\(\s*locations\[6\]\s*\)/);
+assert.match(winGame.toString(), /update\s*\(\s*locations\s*\[\s*6\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -185,7 +185,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
index b70c74ede29..f2b63a0893c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
@@ -7,7 +7,7 @@ dashedName: step-140
 
 # --description--
 
-Add another object in the `locations` array. Everything should be the same as the `lose` object, except the `name` should be `win` and the `text` should be `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Add another object in the `locations` array. Everything should be the same as the `lose` object, except the `name` should be `"win"` and the `text` should be `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 # --hints--
 
@@ -23,13 +23,13 @@ Your seventh `locations` value should be an object.
 assert.isObject(locations[6]);
 ```
 
-Your seventh `locations` value should have a `name` property with the value `win`.
+Your seventh `locations` value should have a `name` property with the value `"win"`.
 
 ```js
 assert.equal(locations[6].name, 'win');
 ```
 
-Your seventh `locations` value should have a `button text` array with three `REPLAY?` strings.
+Your seventh `locations` value should have a `button text` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[6]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
@@ -41,10 +41,10 @@ Your seventh `locations` value should have a `button functions` array with three
 assert.deepEqual(locations[6]["button functions"], [restart, restart, restart]);
 ```
 
-Your seventh `locations` value should have a `text` property with the value `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Your seventh `locations` value should have a `text` property with the value `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 ```js
-assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! 🎉');
+assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! &#x1F389;');
 ```
 
 # --seed--
@@ -210,7 +210,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 --fcc-editable-region--
 ];
@@ -228,7 +228,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
index 8214d5dbf0f..b7bad4b4074 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
@@ -16,7 +16,7 @@ Inside your `attack` function, change your `health -= monsters[fighting].level;`
 You should update your `health` line to be `health -= getMonsterAttackValue(monsters[fighting].level);`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(monsters\[fighting\]\.level\)/);
+assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)/);
 ```
 
 # --seed--
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -204,7 +204,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
index 73b31c2143e..f55432b2c36 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
index a0adfe98005..94bef351fd7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
@@ -22,13 +22,13 @@ assert.match(code, /const\s+hit/);
 You should use the equation `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(Math\.random\(\)\s*\*\s*xp\))/);
+assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\))/);
 ```
 
 You should set `hit` to the value of `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(code, /hit\s*=\s*\(level\s*\*\s*5\)\s*-\s*\(Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\)/);
+assert.match(code, /hit\s*=\s*\(\s*level\s*\*\s*5\s*\)\s*-\s*\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
index 42231b65d84..1ac1b564f17 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
index 095532194d9..4258cf8fd54 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
@@ -188,13 +188,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -211,7 +211,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
index df43e068822..52b90e06276 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
@@ -207,13 +207,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -230,7 +230,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
index 86b76032640..351dab64559 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
index c06fa522511..8ac903940a1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
@@ -14,7 +14,7 @@ Move your `monsterHealth` assignment into your `if` block.
 You should move your `monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1` into your `if` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1/)
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
index ec8229acffd..0f1429cf2ad 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
@@ -7,20 +7,20 @@ dashedName: step-149
 
 # --description--
 
-Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `You miss.` to the end of `text.innerText`.
+Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `" You miss."` to the end of `text.innerText`.
 
 # --hints--
 
 You should add an `else` block after your `if (isMonsterHit())` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else/)
 ```
 
-You should add the text `You miss.` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
+You should add the text `" You miss."` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
index 67dfb73b231..d416bbb7431 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
@@ -20,7 +20,7 @@ assert.match(code, /function\s+isMonsterHit/);
 Your `isMonsterHit` function should return the result of the comparison `Math.random() > .2`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2/);
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
index b0a0653d893..7784c2d49de 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
@@ -32,7 +32,7 @@ assert.match(isMonsterHit.toString(), /\|\|\s*health\s*<\s*20/);
 Your function should return the result of the comparison `Math.random() > .2` **or** `health < 20`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
 ```
 
 # --seed--
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
index 495bec18415..fa6e46189de 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
@@ -21,7 +21,7 @@ assert.lengthOf(ifs, 5);
 Your new `if` statement should check `Math.random() <= .1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\)\s*<=\s*0?\.1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*<=\s*0?\.1\s*\)/);
 ```
 
 # --seed--
@@ -186,13 +186,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -209,7 +209,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
index 9ebf66f29ff..75e7e7fdc67 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
@@ -7,7 +7,7 @@ dashedName: step-153
 
 # --description--
 
-Use the `+=` operator to add `Your <weapon> breaks.`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
+Use the `+=` operator to add `" Your <weapon> breaks."`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
 
 # --hints--
 
@@ -21,7 +21,7 @@ assert.lengthOf(concat, 3);
 You should use the `pop` method on the `inventory` array.
 
 ```js
-assert.match(attack.toString(), /inventory\.pop\(\)/);
+assert.match(attack.toString(), /inventory\.pop\(\s*\)/);
 ```
 
 You should add `Your`, with a space before and after it, to `text.innerText`.
@@ -30,17 +30,16 @@ You should add `Your`, with a space before and after it, to `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1/);
 ```
 
-You should add the return value of `inventory.pop()` to the `Your` string.
+You should add the return value of `inventory.pop()` to the `" Your "` string.
 
 ```js
-console.log(attack.toString());
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)/);
 ```
 
-You should add `breaks.`, with a space in front of it, to the end of your string.
+You should add `" breaks."`, with a space in front of it, to the end of your string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)\s*\+\s*('|")\sbreaks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)\s*\+\s*('|")\sbreaks\.\2/);
 ```
 
 # --seed--
@@ -205,13 +204,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -228,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
index 97d5746c0e6..cb4f98370a3 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
@@ -7,7 +7,13 @@ dashedName: step-154
 
 # --description--
 
-Remember that the increment operator `++` can be used to increase a variable's value by 1. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by 1.
+Remember that the increment operator `++` can be used to increase a variable's value by `1`. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by `1`. For example :
+
+```js
+let num = 10;
+num--;
+console.log(num); // Output: 9
+```
 
 Decrement the value of `currentWeapon` in your `if` statement, after you update the text.
 
@@ -187,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -210,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
index 81204537ebf..fb08209886d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
@@ -24,19 +24,19 @@ if (firstName === "Quincy" && lastName === "Larson") {
 You should not modify your existing `if` statement.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1/);
 ```
 
 You should use the logical AND operator `&&`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&/);
 ```
 
 You should use the logical AND operator to check if `inventory.length` does not equal `1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
 ```
 
 # --seed--
@@ -201,13 +201,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
index fe35aa83b6e..3320abac13c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
@@ -28,7 +28,7 @@ assert.match(easterEgg.toString(), /update\(/);
 `easterEgg` should call the `update` function with `locations[7]` as the argument.
 
 ```js
-assert.match(easterEgg.toString(), /update\(\s*locations\[7\]\s*\)/);
+assert.match(easterEgg.toString(), /update\(\s*locations\s*\[\s*7\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
index 151cf4ed2d5..bc5c75fdb1e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
index 8ff8ec6621b..c4f60b0792a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
@@ -211,13 +211,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -234,7 +234,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
index b5755984113..5bcd8e739c0 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
@@ -7,7 +7,7 @@ dashedName: step-159
 
 # --description--
 
-Add another object to your `locations` array. Set `name` to `easter egg`, set `button text` to an array with the strings `2`, `8`, and `Go to town square?`, set `button functions` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Add another object to your `locations` array. Set `name` to `"easter egg"`, set `"button text"` to an array with the strings `"2"`, `"8"`, and `"Go to town square?"`, set `"button functions"` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 # --hints--
 
@@ -23,25 +23,25 @@ Your eighth `locations` value should be an object.
 assert.isObject(locations[7]);
 ```
 
-Your eighth `locations` value should have a `name` property with the value `easter egg`.
+Your eighth `locations` value should have a `name` property with the value `"easter egg"`.
 
 ```js
 assert.equal(locations[7].name, "easter egg");
 ```
 
-Your eighth `locations` value should have a `button text` array with the strings `2`, `8`, and `Go to town square?`.
+Your eighth `locations` value should have a `"button text"` array with the strings `"2"`, `"8"`, and `"Go to town square?"`.
 
 ```js
 assert.deepEqual(locations[7]["button text"], ["2", "8", "Go to town square?"]);
 ```
 
-Your eighth `locations` value should have a `button functions` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
+Your eighth `locations` value should have a `"button functions"` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[7]["button functions"], [pickTwo, pickEight, goTown]);
 ```
 
-Your eighth `locations` value should have a `text` property with the value `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Your eighth `locations` value should have a `text` property with the value `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 ```js
 assert.equal(locations[7].text, "You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!");
@@ -209,13 +209,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
 --fcc-editable-region--
 
@@ -235,7 +235,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
index 4eb559dc555..144e384890e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
@@ -14,7 +14,7 @@ Inside `pick`, use `const` to initialize a variable named `numbers` and set it t
 Your `pick` function should initialize `numbers` to an empty array `[]`.
 
 ```js
-assert.match(pick.toString(), /numbers\s*=\s*\[\]/);
+assert.match(pick.toString(), /numbers\s*=\s*\[\s*\]/);
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
index adff63df501..690b9c4efd5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
@@ -195,13 +195,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
index 63256c6816a..c7319b7da11 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
@@ -20,13 +20,13 @@ assert.match(pick.toString(), /numbers\.push\(/);
 You should use `Math.floor(Math.random() * 11)` to create the random number.
 
 ```js
-assert.match(pick.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)/);
+assert.match(pick.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)/);
 ```
 
 You should `push` the result of `Math.floor(Math.random() * 11)` to the end of the `numbers` array.
 
 ```js
-assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)\s*\)/);
+assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
index 6f6db396fee..50ee79091f1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
@@ -7,23 +7,23 @@ dashedName: step-163
 
 # --description--
 
-After the `while` loop, set `text.innerText` to equal `You picked <someGuess>. Here are the random numbers:`. Replace `<someGuess>` with the `guess` function parameter.
+After the `while` loop, set `text.innerText` to equal `"You picked <someGuess>. Here are the random numbers:"`. Replace `<someGuess>` with the `guess` function parameter.
 
 # --hints--
 
-You should set `text.innerText` to the string `You picked`. Remember that spacing matters.
+You should set `text.innerText` to the string `"You picked "`. Remember that spacing matters.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1/);
 ```
 
-You should use the concatenation operator to add the value of the `guess` parameter to your `You picked` string.
+You should use the concatenation operator to add the value of the `guess` parameter to your `"You picked "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess/);
 ```
 
-You should use the concatenation operator to add the string `. Here are the random numbers:` to your `"You picked " + guess` string.
+You should use the concatenation operator to add the string `". Here are the random numbers:"` to your `"You picked " + guess` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\2/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
index 5f4c6ece5c7..b5c0ff67275 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
@@ -11,7 +11,7 @@ At the end of the string, before the final quote, insert the new line escape cha
 
 # --hints--
 
-You should add the new line escape character `\n` to your `. Here are the random numbers:` string.
+You should add the new line escape character `\n` to your `". Here are the random numbers: "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\\n\2/);
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
index b1feb5c19e8..4cfce9c5908 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -214,7 +214,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
index 0030e660a57..1f2ce1ffbfa 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
@@ -11,7 +11,7 @@ dashedName: step-166
 
 The initialization expression is executed only once, before the loop starts, and is often used to define and set up the loop variable. Think of it like declaring a counter to use in your loop.
 
-Many `for` loops use `i` as the counter and start from 0, so change `let x = 1;` to `let i = 0;`.
+Many `for` loops use `i` as the counter and start from `0`, so change `let x = 1;` to `let i = 0;`.
 
 # --hints--
 
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
index b6b9c8a6121..82b517528b7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
@@ -9,7 +9,7 @@ dashedName: step-167
 
 The second statement in a `for` loop, the condition statement, is evaluated at the beginning of every loop iteration. The loop will continue as long as the condition evaluates to be true.
 
-We want the loop to run 10 times, so change `x < 5` to `i < 10`.
+We want the loop to run `10` times, so change `x < 5` to `i < 10`.
 
 # --hints--
 
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
index d9ec16a15e7..d87e5e62858 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
index d7f2dcd44d4..71875c1a0ea 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
@@ -20,20 +20,19 @@ assert.match(pick.toString(), /text\.innerText\s*\+=/);
 You should use bracket notation to access `numbers[i]`.
 
 ```js
-assert.match(pick.toString(), /numbers\[i\]/);
+assert.match(pick.toString(), /numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add `numbers[i]` to your `text.innerText` value.
 
 ```js
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add a new-line character after the `numbers[i]` value. Remember that you can do this with `\n`.
 
 ```js
-console.log(pick.toString());
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]\s*\+\s*('|")\\n\1/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]\s*\+\s*('|")\\n\1/);
 ```
 
 # --seed--
@@ -198,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
index 04c6da995f6..5d2de454974 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
@@ -198,13 +198,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
index 8c027fab766..659e9a1e4b1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
@@ -7,11 +7,11 @@ dashedName: step-171
 
 # --description--
 
-Inside the `if` statement, add the string `Right! You win 20 gold!` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
+Inside the `if` statement, add the string `"Right! You win 20 gold!"` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
 
 # --hints--
 
-You should use compound assignment to add the string `Right! You win 20 gold!` to the end of `text.innerText`.
+You should use compound assignment to add the string `"Right! You win 20 gold!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Right! You win 20 gold!\1/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
index b5fc8597c6d..b0868a55bf0 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
@@ -7,7 +7,7 @@ dashedName: step-172
 
 # --description--
 
-Now add an `else` statement. Inside, add `Wrong! You lose 10 health!` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
+Now add an `else` statement. Inside, add `"Wrong! You lose 10 health!"` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should add an `else` block.
 assert.match(pick.toString(), /else\s*\{/);
 ```
 
-Your `else` block should use compound assignment to add `Wrong! You lose 10 health!` to the end of `text.innerText`.
+Your `else` block should use compound assignment to add `"Wrong! You lose 10 health!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Wrong! You lose 10 health!\1/);
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -226,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
index 5a9af82631f..650fe59ddd1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
@@ -27,7 +27,7 @@ assert.match(pick.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 Your `if` statement should call the `lose` function.
 
 ```js
-assert.match(pick.toString(), /lose\(\)/);
+assert.match(pick.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
@@ -192,13 +192,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -221,7 +221,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
index 7bff28bc93a..ebf70ca3d06 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
@@ -7,13 +7,13 @@ dashedName: step-174
 
 # --description--
 
-Looking at your `kill monster` object, `button functions` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `button text`.
+Looking at your `"kill monster"` object, `"button functions"` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `"button text"`.
 
 With this, your RPG game is complete! You can now play around - can you defeat the dragon?
 
 # --hints--
 
-You should update your fifth `locations` object to have a `button functions` property of `[goTown, goTown, easterEgg]`.
+You should update your fifth `locations` object to have a `"button functions"` property of `[goTown, goTown, easterEgg]`.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, easterEgg]);
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
@@ -557,13 +557,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
index 710dd2e3c95..f3d11a95837 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
@@ -1,13 +1,13 @@
 ---
 id: 62ba17beef16c563069a65d8
-title: Step 137
+title: Step 136
 challengeType: 0
-dashedName: step-137
+dashedName: step-136
 ---
 
 # --description--
 
-In the `locations` array, add another object at the end. Set the `name` property to `lose`, set `button text` to an array with three `REPLAY?` strings, set `button functions` to an array with three `restart` variables, and set `text` to `You die. ☠️`. You can copy that text to use the emote.
+In the `locations` array, add another object at the end. Set the `name` property to `"lose"`, set `"button text"` to an array with three `"REPLAY?"` strings, set `"button functions"` to an array with three `restart` variables, and set `text` to `"You die. &#x2620;"`.
 
 # --hints--
 
@@ -23,28 +23,28 @@ Your sixth `locations` value should be an object.
 assert.isObject(locations[5]);
 ```
 
-Your sixth `locations` value should have a `name` property with the value `lose`.
+Your sixth `locations` value should have a `name` property with the value `"lose"`.
 
 ```js
 assert.equal(locations[5].name, 'lose');
 ```
 
-Your sixth `locations` value should have a `button text` array with three `REPLAY?` strings.
+Your sixth `locations` value should have a `"button text"` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[5]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
 ```
 
-Your sixth `locations` value should have a `button functions` array with three `restart` variables.
+Your sixth `locations` value should have a `"button functions"` array with three `restart` variables.
 
 ```js
 assert.deepEqual(locations[5]["button functions"], [restart, restart, restart]);
 ```
 
-Your sixth `locations` value should have a `text` property with the value `You die. ☠️`.
+Your sixth `locations` value should have a `text` property with the value `"You die. &#x2620;"`.
 
 ```js
-assert.equal(locations[5].text, 'You die. ☠️');
+assert.equal(locations[5].text, 'You die. &#x2620;');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
index 4e081fc552d..1bd55627a03 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
@@ -17,7 +17,7 @@ You should declare a `button2` variable with `const`.
 assert.match(code, /const\s+button2/);
 ```
 
-Your `button2` variable should have the value of your `#button2` element.
+Your `button2` variable should have the value of your `"#button2"` element.
 
 ```js
 assert.deepEqual(button2, document.querySelector('#button2'));
@@ -29,7 +29,7 @@ You should declare a `button3` variable with `const`.
 assert.match(code, /const\s+button3/);
 ```
 
-Your `button3` variable should have the value of your `#button3` element.
+Your `button3` variable should have the value of your `"#button3"` element.
 
 ```js
 assert.deepEqual(button3, document.querySelector('#button3'));
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
new file mode 100644
index 00000000000..432c7be3420
--- /dev/null
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
@@ -0,0 +1,356 @@
+---
+id: 65b2f6acce65b7a69751a090
+title: Step 138
+challengeType: 0
+dashedName: step-138
+---
+
+# --description--
+
+In order for the `&#x2620;` emoticon text to properly display on the page, you will need to use the <dfn>innerHTML</dfn> property.
+
+The `innerHTML` property allows you to access or modify the content inside an HTML element using JavaScript.
+
+Here is an example of updating the content for this paragraph element using the `innerHTML`  property.
+
+```html
+<p id="demo">This is a paragraph.</p>
+```
+
+```js
+document.querySelector("#demo").innerHTML = "Hello, innerHTML!";
+```
+
+In the `update` function, change `text.innerText` to `text.innerHTML`.
+
+# --hints--
+
+
+You should use dot notation to access the `innerHTML` property of `text`.
+
+```js
+assert.match(code, /text\.innerHTML/);
+```
+
+You should not use `let` or `const` to access the `innerHTML` property of `text`.
+
+```js
+assert.notMatch(code, /(let|const)\s+text.innerHTML/);
+```
+
+You should set `innerHTML` equal to the `text` property of `location`.
+
+```js
+assert.match(code, /text\.innerHTML\s*=\s*location\.text/);
+```
+
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <link rel="stylesheet" href="./styles.css">
+    <title>RPG - Dragon Repeller</title>
+  </head>
+  <body>
+    <div id="game">
+      <div id="stats">
+        <span class="stat">XP: <strong><span id="xpText">0</span></strong></span>
+        <span class="stat">Health: <strong><span id="healthText">100</span></strong></span>
+        <span class="stat">Gold: <strong><span id="goldText">50</span></strong></span>
+      </div>
+      <div id="controls">
+        <button id="button1">Go to store</button>
+        <button id="button2">Go to cave</button>
+        <button id="button3">Fight dragon</button>
+      </div>
+      <div id="monsterStats">
+        <span class="stat">Monster Name: <strong><span id="monsterName"></span></strong></span>
+        <span class="stat">Health: <strong><span id="monsterHealth"></span></strong></span>
+      </div>
+      <div id="text">
+        Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.
+      </div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+body {
+  background-color: #0a0a23;
+}
+
+#text {
+  background-color: #0a0a23;
+  color: #ffffff;
+  padding: 10px;
+}
+
+#game {
+  max-width: 500px;
+  max-height: 400px;
+  background-color: #ffffff;
+  color: #ffffff;
+  margin: 30px auto 0px;
+  padding: 10px;
+}
+
+#controls,
+#stats {
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #0a0a23;
+}
+
+#monsterStats {
+  display: none;
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #ffffff;
+  background-color: #c70d0d;
+}
+
+.stat {
+  padding-right: 10px;
+}
+
+button {
+  cursor: pointer;
+  color: #0a0a23;
+  background-color: #feac32;
+  background-image: linear-gradient(#fecc4c, #ffac33);
+  border: 3px solid #feac32;
+}
+```
+
+```js
+let xp = 0;
+let health = 100;
+let gold = 50;
+let currentWeapon = 0;
+let fighting;
+let monsterHealth;
+let inventory = ["stick"];
+
+const button1 = document.querySelector('#button1');
+const button2 = document.querySelector("#button2");
+const button3 = document.querySelector("#button3");
+const text = document.querySelector("#text");
+const xpText = document.querySelector("#xpText");
+const healthText = document.querySelector("#healthText");
+const goldText = document.querySelector("#goldText");
+const monsterStats = document.querySelector("#monsterStats");
+const monsterName = document.querySelector("#monsterName");
+const monsterHealthText = document.querySelector("#monsterHealth");
+const weapons = [
+  { name: 'stick', power: 5 },
+  { name: 'dagger', power: 30 },
+  { name: 'claw hammer', power: 50 },
+  { name: 'sword', power: 100 }
+];
+const monsters = [
+  {
+    name: "slime",
+    level: 2,
+    health: 15
+  },
+  {
+    name: "fanged beast",
+    level: 8,
+    health: 60
+  },
+  {
+    name: "dragon",
+    level: 20,
+    health: 300
+  }
+]
+const locations = [
+  {
+    name: "town square",
+    "button text": ["Go to store", "Go to cave", "Fight dragon"],
+    "button functions": [goStore, goCave, fightDragon],
+    text: "You are in the town square. You see a sign that says \"Store\"."
+  },
+  {
+    name: "store",
+    "button text": ["Buy 10 health (10 gold)", "Buy weapon (30 gold)", "Go to town square"],
+    "button functions": [buyHealth, buyWeapon, goTown],
+    text: "You enter the store."
+  },
+  {
+    name: "cave",
+    "button text": ["Fight slime", "Fight fanged beast", "Go to town square"],
+    "button functions": [fightSlime, fightBeast, goTown],
+    text: "You enter the cave. You see some monsters."
+  },
+  {
+    name: "fight",
+    "button text": ["Attack", "Dodge", "Run"],
+    "button functions": [attack, dodge, goTown],
+    text: "You are fighting a monster."
+  },
+  {
+    name: "kill monster",
+    "button text": ["Go to town square", "Go to town square", "Go to town square"],
+    "button functions": [goTown, goTown, goTown],
+    text: 'The monster screams "Arg!" as it dies. You gain experience points and find gold.'
+  },
+  {
+    name: "lose",
+    "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
+    "button functions": [restart, restart, restart],
+    text: "You die. &#x2620;"
+  }
+
+];
+
+// initialize buttons
+button1.onclick = goStore;
+button2.onclick = goCave;
+button3.onclick = fightDragon;
+
+function update(location) {
+  --fcc-editable-region--
+  monsterStats.style.display = "none";
+  button1.innerText = location["button text"][0];
+  button2.innerText = location["button text"][1];
+  button3.innerText = location["button text"][2];
+  button1.onclick = location["button functions"][0];
+  button2.onclick = location["button functions"][1];
+  button3.onclick = location["button functions"][2];
+  text.innerText = location.text;
+  --fcc-editable-region--
+}
+
+function goTown() {
+  update(locations[0]);
+}
+
+function goStore() {
+  update(locations[1]);
+}
+
+function goCave() {
+  update(locations[2]);
+}
+
+function buyHealth() {
+  if (gold >= 10) {
+    gold -= 10;
+    health += 10;
+    goldText.innerText = gold;
+    healthText.innerText = health;
+  } else {
+    text.innerText = "You do not have enough gold to buy health.";
+  }
+}
+
+function buyWeapon() {
+  if (currentWeapon < weapons.length - 1) {
+    if (gold >= 30) {
+      gold -= 30;
+      currentWeapon++;
+      goldText.innerText = gold;
+      let newWeapon = weapons[currentWeapon].name;
+      text.innerText = "You now have a " + newWeapon + ".";
+      inventory.push(newWeapon);
+      text.innerText += " In your inventory you have: " + inventory;
+    } else {
+      text.innerText = "You do not have enough gold to buy a weapon.";
+    }
+  } else {
+    text.innerText = "You already have the most powerful weapon!";
+    button2.innerText = "Sell weapon for 15 gold";
+    button2.onclick = sellWeapon;
+  }
+}
+
+function sellWeapon() {
+  if (inventory.length > 1) {
+    gold += 15;
+    goldText.innerText = gold;
+    let currentWeapon = inventory.shift();
+    text.innerText = "You sold a " + currentWeapon + ".";
+    text.innerText += " In your inventory you have: " + inventory;
+  } else {
+    text.innerText = "Don't sell your only weapon!";
+  }
+}
+
+function fightSlime() {
+  fighting = 0;
+  goFight();
+}
+
+function fightBeast() {
+  fighting = 1;
+  goFight();
+}
+
+function fightDragon() {
+  fighting = 2;
+  goFight();
+}
+
+function goFight() {
+  update(locations[3]);
+  monsterHealth = monsters[fighting].health;
+  monsterStats.style.display = "block";
+  monsterName.innerText = monsters[fighting].name;
+  monsterHealthText.innerText = monsterHealth;
+}
+
+function attack() {
+  text.innerText = "The " + monsters[fighting].name + " attacks.";
+  text.innerText += " You attack it with your " + weapons[currentWeapon].name + ".";
+  health -= monsters[fighting].level;
+  monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1;
+  healthText.innerText = health;
+  monsterHealthText.innerText = monsterHealth;
+   if (health <= 0) {
+    lose();
+  } else if (monsterHealth <= 0) {
+    if (fighting === 2) {
+      winGame();
+    } else {
+      defeatMonster();
+    }
+  }
+}
+
+function dodge() {
+  text.innerText = "You dodge the attack from the " + monsters[fighting].name;
+}
+
+function defeatMonster() {
+  gold += Math.floor(monsters[fighting].level * 6.7);
+  xp += monsters[fighting].level;
+  goldText.innerText = gold;
+  xpText.innerText = xp;
+  update(locations[4]);
+}
+
+function lose() {
+  update(locations[5]);
+}
+
+function restart() {
+  xp = 0;
+  health = 100;
+  gold = 50;
+  currentWeapon = 0;
+  inventory = ["stick"];
+  goldText.innerText = gold;
+  healthText.innerText = health;
+  xpText.innerText = xp;
+  goTown();
+}
+```
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
index 8cf076939de..8b264bf50e8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
@@ -22,21 +22,21 @@ You should use bracket notation to access the property of `totalCountPerProduct`
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 You should use the assignment operator to update the value of the property of `totalCountPerProduct` that corresponds to `dessert.id`.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=/);
 ```
 
 You should update the value of `totalCountPerProduct` to be the current value plus one.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\+\s*1/);
 ```
 
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
index ab4e048e846..f210ff3bb8f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
@@ -17,28 +17,28 @@ You should wrap your right-hand `totalCountPerProduct[dessert.id]` in parenthese
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 You should use the `||` operator.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*/);
 ```
 
 You should use `0` as your fallback value.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
 ```
 
 You should still add `1` to the value.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
index ec1f0bc6540..8cac93ce139 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
@@ -29,7 +29,7 @@ You should assign the value of `totalCountPerProduct[product.id]` to `currentPro
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\[product\.id\]/);
+assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\s*\[\s*product\.id\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
index cfd0b381c59..82367d1abda 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
@@ -32,7 +32,7 @@ assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*
 You should add an empty callback function to the event listener. Remember to give it an `event` parameter.
 
 ```js
-assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*\s*\}\s*\)/);
+assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*;?\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
index 228d92f0564..e43665a540c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
@@ -53,7 +53,7 @@ Your `reduce` call should have an initial value of `0`.
 
 ```js
 const afterCalculateTotal = code.split('calculateTotal')[1];
-assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(total,\s*item\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
+assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(\s*total,\s*item\s*\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
index 5ff3b64938d..eff305ad7e9 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
@@ -37,7 +37,6 @@ assert.match(afterCalculateTaxes, /amount\s*\*\s*\(\s*this\s*\.\s*taxRate\s*\/\s
 Your `calculateTaxes` method should return the value of the `taxRate` (divided by 100, to convert it to a percent) multiplied by the `amount` parameter.
 
 ```js
-console.log(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 assert.equal(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 ```
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
index b57d7acb9ea..7427f8c2516 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
@@ -19,37 +19,37 @@ Start by accessing the `#playlist-songs`, `#play`, and `#pause` elements with th
 You should use `document.getElementById()` to get the `#playlist-songs` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should assign the `#playlist-songs` element to the variable `playlistSongs`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#play` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should assign the `#play` element to the variable `playButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#pause` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 You should assign the `#pause` element to the variable `pauseButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
index 652d83b86f2..b9a1f287e74 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
@@ -16,37 +16,37 @@ Assign them to variables named `nextButton`, `previousButton`, and `shuffleButto
 You should use `document.getElementById()` to get the `#next` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should assign the `#next` element to the variable `nextButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#previous` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should assign the `#previous` element to the variable `previousButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#shuffle` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 You should assign the `#shuffle` element to the variable `shuffleButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
index 267ab907d2c..be9d659e3a5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
@@ -18,13 +18,13 @@ Use `const` to create a variable named `audio` and set it equal to `new Audio()`
 You should use the `new` keyword to create an instance of the `Audio` object.
 
 ```js
-assert.match(code, /new\s+Audio\(\);?/)
+assert.match(code, /new\s+Audio\(\s*\);?/)
 ```
 
 You should assign the `Audio` object to a constant named `audio`.
 
 ```js
-assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\);?/)
+assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
index e6919c82f43..cb947876895 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
@@ -34,7 +34,7 @@ assert.match(code, /userData\?\.songs\.find\(/)
 Your `find` method should have `song` as the parameter of its arrow function callback.
 
 ```js
-assert.match(code, /userData\?\.songs\.find\(\(?song\)?/)
+assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 Your `find` method should use strict equality to check if `song.id` is equal to `id`.
@@ -46,7 +46,7 @@ assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(so
 Your `find` method should be assigned to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\);?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
index 529d3d67b01..16563e3d14e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
@@ -13,22 +13,22 @@ Also, set the `audio.title` property equal to `song.title`. This tells the audio
 
 # --hints--
 
-You should not modify the exist `playSong` function and its content.
+You should not modify the existing `playSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?/)
 ```
 
 You should set `audio.src` to `song.src`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?/)
 ```
 
 You should set `audio.title` to `song.title`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
index 6645f7c58db..9fbec0fdd13 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
@@ -17,13 +17,13 @@ Add an `if` statement to check whether the `userData?.currentSong` is `null` or
 You should create an `if` statement with the condition `userData?.currentSong === null || userData?.currentSong.id !== song.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*/)
 ```
 
 You should set `audio.currentTime` to `0` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
index 43c2cce5941..93fd224a523 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
@@ -11,9 +11,11 @@ You need to update the current song being played as well as the appearance of th
 
 Start by accessing the `userData` object and its `currentSong` property. Set its value equal to the `song` variable.
 
+*Note*: You should not use the optional chaining operator `?.` in this step because `userData.currentSong` will not be `null` or `undefined` at this point.
+
 # --hints--
 
-You should set `userData.currentSong` to `song`.
+You should assign `song` to `userData.currentSong`.
 
 ```js
 assert.match(code, /userData\.currentSong\s*=\s*song;?/)
@@ -614,7 +616,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   --fcc-editable-region--
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
index a09ff2e596a..2e6a527515e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
@@ -7,9 +7,9 @@ dashedName: step-33
 
 # --description--
 
-You need to hook up the `playSong` function to a `click` event listener so the songs will start playing when the play button is clicked.
+In previous steps you built out the functionality for playing a song. Now you need to add the functionality to the play button so that it will play the current song when it is clicked on.
 
-Add a click event listener to the `playButton` element, then use arrow syntax to pass in a callback with an empty pair of curly braces.
+Use the `addEventListener()` method and pass in a `click` event for the first argument and an empty callback function with arrow syntax for the second argument, e.g., `() => {}`.
 
 # --hints--
 
@@ -22,13 +22,13 @@ assert.match(code, /playButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback into your event listener. Don't forget you also need an empty pair of curly braces.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
index 7842726855b..2bd933a89da 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+songsHTML/);
 You should assign `array.map()` to your `songsHTML`.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\)/);
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
index 324bb5fa749..c28f0c62217 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
@@ -32,7 +32,7 @@ assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\
 You should interpolate `song.title` as the content of your `span` element.
 
 ```js
-assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\$\{song\.title\}\s*<\/span>\s*<\/button>/)
+assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\s*\$\{\s*song\.title\s*\}\s*<\/span>\s*<\/button>/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
index 1b58d21847c..6e717d3263d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
@@ -24,7 +24,7 @@ assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*/)
 Your button element should have an `aria-label` attribute with the value `Delete ${song.title}` as its second attribute and value.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2\s*>/)
 ```
 
 You should paste in the provided `svg` as the content of your `button` element.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
index 812e4ce1a63..ea667115d85 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
@@ -24,7 +24,7 @@ Chain the `join()` method to your `map()` method and pass in an empty string for
 You should add `join("")` to the existing code.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\)\s*\.join\(('|")\3\);?/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\s*\)\s*\.join\(\s*('|")\3\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
index 0bd650dea97..ed90dcd5788 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
@@ -35,7 +35,7 @@ Call the `renderSongs` function with the `songs` property of `userData`. This wi
 You should call your `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /renderSongs\(userData\?\.songs\)/)
+assert.match(code, /renderSongs\(\s*userData\?\.songs\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
index fc6a1407734..2aa27493512 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
@@ -9,20 +9,20 @@ dashedName: step-34
 
 Within the arrow function of the event listener, add an `if` to check if `userData?.currentSong` is `null`.
 
-Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData.songs` array. This will ensure the first song in the playlist is played first.
+Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData?.songs` array. This will ensure the first song in the playlist is played first.
 
 # --hints--
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
index 995a3f533a3..d33162a405a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
@@ -16,20 +16,20 @@ This ensures that the currently playing song will continue to play when the play
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` block to your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.currentSong.id` in the `else` block of your `if` statement.
 
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*playSong\(userData\?\.currentSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*playSong\(\s*userData\?\.currentSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -627,7 +627,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
index 704f9155cbd..bf543568793 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
@@ -28,13 +28,13 @@ assert.isFunction(pauseSong)
 Your `pauseSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `pauseSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
index cfc34734a5f..eba902dc470 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
@@ -9,15 +9,17 @@ dashedName: step-38
 
 To store the current time of the song when it is paused, set the `songCurrentTime` of the `userData` object to the `currentTime` of the `audio` variable.
 
+*Note*: You should not use optional chaining for this step because `userData.songCurrentTime` will not be `null` or `undefined` at this point.
+
 # --hints--
 
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
-You should set `userData.songCurrentTime` to `audio.currentTime`.
+You should assign `audio.currentTime` to `userData.songCurrentTime`.
 
 ```js
 assert.match(code, /userData\.songCurrentTime\s*=\s*audio\.currentTime;?/)
@@ -618,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
index add200cbae0..6665bb41d46 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
@@ -16,19 +16,19 @@ To finally pause the song, use the `pause()` method on the `audio` variable. `pa
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `classList` property and the `remove()` method to remove the class `playing` from the `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.remove\(('|")playing\1\);?/)
+assert.match(code, /playButton\.classList\.remove\(\s*('|")playing\1\s*\);?/)
 ```
 
 You should use the `pause()` method on your `audio` variable.
 
 ```js
-assert.match(code, /audio\.pause\(\)/)
+assert.match(code, /audio\.pause\(\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
index 53a0d9c7d0a..ec4c9009e17 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
@@ -22,13 +22,13 @@ assert.match(code, /pauseButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `pauseSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1,\s*pauseSong\)/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1,\s*pauseSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
index c892d9c9f84..ec7d994bf62 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
@@ -16,13 +16,13 @@ To finally play the song, use the `play()` method on the `audio` variable. `play
 You should use the `classList` property and the `add` method to add the class `playing` to `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.add\(("|')playing\1\);?/)
+assert.match(code, /playButton\.classList\.add\(\s*("|')playing\1\s*\);?/)
 ```
 
 You should use the `play()` method on the `audio` variable.
 
 ```js
-assert.match(code, /audio\.play\(\);?/)
+assert.match(code, /audio\.play\(\s*\);?/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
 
   userData.currentSong = song;
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
index 52e56cc26e0..ced6464aca0 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
@@ -28,13 +28,13 @@ assert.isFunction(playNextSong)
 Your `playNextSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playNextSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
index 79abfb02ca9..8079fdf35d7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
@@ -9,30 +9,30 @@ dashedName: step-44
 
 Inside the `playNextSong` function, create an `if` statement to check if the `currentSong` of `userData` is strictly equal to `null`. This will check if there's no current song playing in the `userData` object.
 
-If the condition is true, call the `playSong` function with the `id` of the first song in the `userData.songs` array as an argument.
+If the condition is true, call the `playSong` function with the `id` of the first song in the `userData?.songs` array as an argument.
 
 # --hints--
 
 You should not modify the existing `playNextSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside the `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
index f216a455e46..e27eb12d0ab 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
@@ -14,25 +14,25 @@ Add an `else` block to the `if` statement. Inside the `else` block, call the `ge
 You should not modify the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` to the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 You should set the `currentSongIndex` constant to `getCurrentSongIndex()` inside the `else` block.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*\}/)
 ```
 
 
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -678,7 +678,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
index f0592ebeb1b..113aca26638 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
@@ -18,25 +18,25 @@ Lastly, call the `playSong` function and pass in `nextSong.id` as the argument.
 You should not modify the existing `if` statement, its `else` block, and content.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex + 1]` to a `nextSong` constant.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `nextSong.id`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*playSong\(nextSong\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*playSong\(\s*nextSong\.id\s*\);?\s*\}/)
 ```
 
 
@@ -635,7 +635,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
index 6a7ee984f9e..59ae77496c3 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
@@ -22,13 +22,13 @@ assert.match(code, /nextButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playNextSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1,\s*playNextSong\)/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1,\s*playNextSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -675,7 +675,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
index 1463fc025d0..759c9516b8f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
@@ -26,13 +26,13 @@ assert.isFunction(playPreviousSong)
 Your `playPreviousSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playPreviousSong` function should be empty.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
index 98c5d823d2c..daf1f48e786 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
@@ -16,31 +16,31 @@ Inside the `else` block, create a constant named `currentSongIndex` and assign i
 You should not alter the existing `playPreviousSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should have an `if` statement with the condition `userData?.currentSong === null` inside your `playPreviousSong` function.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*/)
 ```
 
 You should have `return` inside the block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
 ```
 
 You should call `getCurrentSongIndex` and assign it to `currentSongIndex` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -695,7 +695,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
index 14df7e411ea..734c4f3c077 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
@@ -14,19 +14,19 @@ To get the previous song, subtract `1` from the `currentSongIndex` of `userData?
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex - 1]` to a `previousSong` constant.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `previousSong.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*playSong\(previousSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*playSong\(\s*previousSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
index 107dce1e7d2..baf9e938a3e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
@@ -20,13 +20,13 @@ assert.match(code, /previousButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playPreviousSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1,\s*playPreviousSong\)/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1,\s*playPreviousSong\s*\)/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
index 0a2e4793576..e14a0b04358 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
@@ -28,19 +28,19 @@ assert.isFunction(highlightCurrentSong)
 Your `highlightCurrentSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*/)
 ```
 
 You should create a `playlistSongElements` constant inside your `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
 ```
 
 You should use the `querySelectorAll()` method to select the `.playlist-song` element and assign it to the `playlistSongElements` constant.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*\};?/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
index b071156be07..dda67f7dad7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
@@ -22,7 +22,7 @@ assert.isFunction(getCurrentSongIndex);
 Your `getCurrentSongIndex` function should use arrow syntax.
 
 ```js
-assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\)\s*=>\s*{\s*}\s*/);
+assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*/);
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
index 2ad17ada2d2..4a48bfe9d26 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
@@ -16,7 +16,7 @@ Use `getElementById()` to get the `id` of the currently playing song, then use t
 You should not modify the existing `highlightCurrentSong` function and its content.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*/)
 ```
 
 You should use `document.getElementById()` and pass in `` `song-${userData?.currentSong?.id}` ``.
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -692,7 +692,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
index 530936c78ef..e76438d14dd 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
@@ -33,13 +33,13 @@ assert.match(code, /playlistSongElements\.forEach\(/)
 Your `forEach()` method should have a `songEl` parameter and use arrow syntax.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*/)
 ```
 
 Your `forEach` should have an empty pair of curly braces.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -637,7 +637,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
index a3da2d8db65..e394ae062e5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
@@ -16,19 +16,19 @@ Create an `if` statement with the condition `songToHighlight`. For the statement
 You should create an `if` statement with the condition `songToHighlight`.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*/)
 ```
 
 You should use the `setAttribute()` method on `songToHighlight` inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(/)
 ```
 
 You should pass in `"aria-current"` and `"true"` as the first and second argument of your `setAttribute` method.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\)\s*;?\s*\}?/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\s*\)\s*;?\s*\}?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
index d098c9d4b56..651fffd5af4 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
@@ -16,7 +16,7 @@ After that, play around with the control buttons to see how the `highlightCurren
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /highlightCurrentSong\(\)/)
+assert.match(code, /highlightCurrentSong\(\s*\)/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -688,7 +688,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
index 2094f5a4ff3..618920dc7b6 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
@@ -26,13 +26,13 @@ assert.isFunction(setPlayerDisplay)
 Your `setPlayerDisplay` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayerDisplay` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
index 7424e6b4a81..95ea0cc54a3 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
@@ -16,31 +16,31 @@ Access the `#player-song-title` and `#player-song-artist` elements with the `get
 You should not modify the existing `setPlayerDisplay` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use `document.getElementById()` to get the `#player-song-title` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should assign the `#player-song-title` element to the variable `playingSong`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should use `document.getElementById()` to get the `#player-song-artist` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 You should assign the `#player-song-artist` element to the variable `songArtist`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -716,7 +716,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
index 891beebaa21..6905e1c51ab 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -710,7 +710,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
index 0a1fba122c5..0803e7974b5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -725,7 +725,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
index 44fc1fbc3c0..b848dd1af49 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
@@ -16,7 +16,7 @@ Now you should see the song title and the artist show up in the display.
 You should call the `setPlayerDisplay` function inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayerDisplay\(\);?/)
+assert.match(code, /setPlayerDisplay\(\s*\);?/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
index 1ce23a7ee05..8c1698bd9b4 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
@@ -28,13 +28,13 @@ assert.isFunction(setPlayButtonAccessibleText)
 Your `setPlayButtonAccessibleText` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayButtonAccessibleText` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -719,7 +719,7 @@ const renderSongs = (array) => {
 
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
index aece6fa81c3..e4762acc334 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
@@ -16,19 +16,19 @@ Don't forget to use optional chaining.
 You should not modify the existing `setPlayButtonAccessibleText` and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should access `userData?.currentSong` or `userData?.songs[0]`.
 
 ```js
-assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 You should assign `userData?.currentSong || userData?.songs[0]` to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -715,7 +715,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
index 44f191d6811..04b9a44fb1a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
@@ -16,7 +16,7 @@ Don't forget you need template interpolation here, so you need to use backticks.
 You should not modify the existing `setPlayButtonAccessibleText` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `setAttribute()` method on `playButton`.
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
index f188670fb16..97bbe40f014 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
@@ -14,7 +14,7 @@ Now, call the `setPlayButtonAccessibleText` function inside the `playSong` funct
 You should call the `setPlayButtonAccessibleText` inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayButtonAccessibleText\(\);?/)
+assert.match(code, /setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -707,7 +707,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
index 2876ce7e386..911f4ff74b8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
@@ -28,13 +28,13 @@ assert.isFunction(shuffle)
 Your `shuffle` function should use an arrow syntax and should not take a parameter.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `shuffle` function  should be empty.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -729,7 +729,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
index fe8d6f9019b..dbae70d71f5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
@@ -24,7 +24,7 @@ Use the `sort()` method on the `userData?.songs` array. Pass a callback to the m
 You should not modify the existing `shuffle` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*{\s*[\s\S]*?\};?/);
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*{\s*[\s\S]*?\};?/);
 ```
 
 You should use the `sort()` method on `userData?.songs`.
@@ -42,7 +42,7 @@ assert.match(code, /userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*/)
 The callback of your `sort()` method should return `Math.random() - 0.5`.
 
 ```js
-assert.match(code, /userData\?.songs\.sort\s*\(\(\)\s*=>(\s*{\s*return\s+Math\.random\(\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\)\s*-\s*0\.5\s*)\);?/);
+assert.match(code, /userData\?.songs\.sort\s*\(\s*\(\s*\)\s*=>(\s*{\s*return\s+Math\.random\(\s*\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\s*\)\s*-\s*0\.5\s*)\s*\);?/);
 ```
 
 # --seed--
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -739,7 +739,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
index 0b8ff3820ca..1f2ffefc8c0 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
@@ -11,6 +11,8 @@ When the shuffle button is pressed, you want to set the `currentSong` to nothing
 
 Set `userData.currentSong` to `null` and `userData.songCurrentTime` to `0`.
 
+*Note*: You should not use optional chaining for this step because you are explicitly setting the `currentSong` and `songCurrentTime` properties to be `null` and `0` respectively.
+
 # --hints--
 
 You should set `userData.currentSong` to `null`.
@@ -620,7 +622,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -720,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
index cce3e3960ef..c8eb8a8c7e1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
@@ -16,31 +16,31 @@ Call the `renderSongs` function and pass in `userData?.songs` as an argument. Al
 You should not modify the existing `shuffle` function and its content.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -741,7 +741,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
index bd5bbe173df..d3acfc8a47e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
@@ -22,13 +22,13 @@ assert.match(code, /shuffleButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 You should pass in `shuffle` as the second value of your `click` event listener.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1,\s*shuffle\);?/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1,\s*shuffle\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
index d9e66f6ee0c..5ab90ce02a4 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -746,7 +746,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
index b6ef6eb7436..2c6779735a9 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
@@ -7,7 +7,7 @@ dashedName: step-73
 
 # --description--
 
-Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData.songs` array.
+Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData?.songs` array.
 
 The `filter` method keeps only the elements of an array that satisfy the callback function passed to it:
 
@@ -20,12 +20,14 @@ console.log(numsGreaterThanThree) // Output: [10, 8, 4, 5]
 
 Use the `filter()` method on `userData?.songs`. Pass in `song` as the parameter of the arrow function callback and use implicit return to check if `song.id` is strictly not equal to `id`. Assign all of that to the `userData.songs`.
 
+*Note*: You should not use optional chaining when you assign the result of  `userData?.songs.filter` to `userData.songs` because the `allSongs` array will not be `undefined` or `null` at that point.
+
 # --hints--
 
 You should not modify the existing `deleteSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should use the `filter()` method on `userData?.songs`.
@@ -647,7 +649,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -757,7 +759,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
index 5b1c0d06652..719bdf58497 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
@@ -18,25 +18,25 @@ After that, call the `highlightCurrentSong` function to highlight the current so
 You should not modify the existing `deleteSong` function and its content.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -634,7 +634,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -745,7 +745,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
index 72dc34a6dc4..974b693f0e5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
@@ -16,7 +16,7 @@ Use an `if` statement to check if the `userData?.currentSong?.id` is equal to th
 You should create an empty `if` statement with the condition `userData?.currentSong?.id === id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
index a0db51e3247..b99fd08fe67 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
@@ -16,31 +16,31 @@ After that, call the `pauseSong()` function to stop the playback and the `setPla
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.currentSong` to `null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.songCurrentTime` to `0`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*.*\s*\}/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -755,7 +755,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
index b32e306e9ed..b27131aaa23 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
@@ -9,14 +9,14 @@ dashedName: step-78
 
 Next, you need to check if the playlist is empty. If it is, you should reset the `userData` object to its original state.
 
-Use an `if` statement to check if the `userData.songs` has a length of `0`.
+Use an `if` statement to check if the `userData?.songs` has a length of `0`.
 
 # --hints--
 
-You should create an empty `if` statement with the condition `userData.songs.length === 0`
+You should create an empty `if` statement with the condition `userData?.songs.length === 0`.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -738,7 +738,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
index dad0ddfd188..e1f1afcd856 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
@@ -33,19 +33,19 @@ Inside your `if` statement, declare a `resetButton` constant, then use `createEl
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*.*\s*\}/)
 ```
 
 You should use the `createElement` method to create a `button`.
 
 ```js
-assert.match(code, /document\.createElement\(('|")button\1\);?/)
+assert.match(code, /document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 You should assign your newly created `button` element to a `resetButton` constant.
 
 ```js
-assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?/)
+assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 # --seed--
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -708,7 +708,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
 
   }
 --fcc-editable-region--
@@ -769,7 +769,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
index 06b7509ed6a..8aa85dd2cdb 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
@@ -18,7 +18,7 @@ Set the `id` attribute of `resetButton` to `reset` and its `aria-label` attribut
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should use `resetButton.id` to create an `id` attribute named `reset` for the `resetButton`.
@@ -628,7 +628,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
index ee40d9aa338..3ea189e33f2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
@@ -32,7 +32,7 @@ assert.match(code, /resetButton\.appendChild\(/)
 You should pass in `resetText` as the value of your first `appendChild()`.
 
 ```js
-assert.match(code, /resetButton\.appendChild\(resetText\);?/)
+assert.match(code, /resetButton\.appendChild\(\s*resetText\s*\);?/)
 ```
 
 You should use the `appendChild()` method on `playlistSongs`.
@@ -44,7 +44,7 @@ assert.match(code, /playlistSongs\.appendChild\(/)
 You should pass in `resetButton` as the value of your second `appendChild()`.
 
 ```js
-assert.match(code, /playlistSongs\.appendChild\(resetButton\);?/)
+assert.match(code, /playlistSongs\.appendChild\(\s*resetButton\s*\);?/)
 ```
 
 # --seed--
@@ -642,7 +642,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -773,7 +773,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
index 8f6b2e34e8d..d56a149fe7b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
@@ -22,13 +22,13 @@ assert.match(code, /resetButton\.addEventListener\(/)
 Your `resetButton` event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 The callback function of your event listener should use arrow syntax and have an empty pair of curly braces.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -690,7 +690,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -760,7 +760,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
index 61b5ff2e425..b9b671125ae 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
@@ -7,22 +7,22 @@ dashedName: step-84
 
 # --description--
 
-You need to assign the `userData.songs` property to the initial `allSongs` array. This will reset the playlist to its original state.
+To reset the playlist to its original state, spread `allSongs` into an array and assign it to `userData.songs`.
 
-Spread `allSongs` into an array and assign it to `userData.songs`.
+*Note*: You should not use optional chaining for the `userData.songs` because the song will not be `null` or `undefined` at this point.
 
 # --hints--
 
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\s*\);?/)
 ```
 
 You should assign `[...allSongs]` to `userData.songs`.
 
 ```js
-assert.match(code, /userData\.songs\s*=\s*\[\.\.\.allSongs\]/)
+assert.match(code, /userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -684,7 +684,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
index 50523852991..93920f0b724 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
@@ -22,25 +22,25 @@ Remove the reset button from the playlist by calling the `remove()` method on th
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*.*\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*.*\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
 You should use the `remove()` method to remove the `resetButton` from the DOM.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*resetButton\.remove\(\);?\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*resetButton\.remove\(\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -702,7 +702,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -776,7 +776,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
index 5cd14a1cbf7..fd465c4bff6 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
@@ -24,13 +24,13 @@ assert.match(code, /audio\.addEventListener\(/)
 The event listener you used on on your `audio` variable should listen for an `ended` event.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback to your `ended` event listener.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 
@@ -629,7 +629,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -768,7 +768,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
index ef9cbca1e47..0ab2bbc31be 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
@@ -7,14 +7,14 @@ dashedName: step-77
 
 # --description--
 
-Within the button element in the `renderSongs` function, add an `onclick` attribute as the first attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
+Within the button element in the `renderSongs` function, add an `onclick` attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
 
 # --hints--
 
-You should add an `onclick` attribute as the first attribute of the delete button and pass in `deleteSong(${song.id})`.
+You should add an `onclick` attribute to the delete button and pass in `deleteSong(${song.id})`.
 
 ```js
-assert.match(code, /<button\s+onclick=('|")deleteSong\(\$\{song\.id\}\)\1\s*class=('|")playlist-song-delete\2\s*aria-label=('|")Delete\s*\$\{song\.title\}\3\s*>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")deleteSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
index 47c836472af..4fda36289b7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
@@ -7,30 +7,35 @@ dashedName: step-87
 
 # --description--
 
-Notice that the album art in the HTML and songs in the `allSongs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
+Notice that the album art in the HTML and songs in the `userData.songs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
 
 Next, you need to check if there is a next song to play. Retrieve the current song index by calling the `getCurrentSongIndex()` function, and save it in a `currentSongIndex` constant.
 
-After that, create a `nextSongExists` constant that checks if a next song exists.
+After that, create a `nextSongExists` constant that contains the boolean value `true` or `false` depending on if the next song exists.
 
 # --hints--
 
 You should not modify the existing `ended` event listener and its content.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should create a `currentSongIndex` constant and set it to the calling of the `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
-You should check if a next song exists with `userData?.songs[currentSongIndex + 1] !== undefined` and set it to a `nextSongExists` constant.
+You should check if a next song exists comparing `userData.songs.length` and `currentSongIndex` and set it to a `nextSongExists` constant. If the last index of the songs array (`userData.songs.length - 1`) is bigger than the currentSongIndex that means there is a next song.
 
 ```js
-assert.match(code, /const\s+nextSongExists\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\]\s*!==\s*undefined;?/)
+const secondPart = code.split(`audio.addEventListener("ended", () => {`)[1];
+const middlePart = secondPart.split("});")[0]
+const codeOutputFirstTest = eval(middlePart + "\nnextSongExists;");
+assert.strictEqual(codeOutputFirstTest, true);
+const codeOutputSecondTest = eval(`\nfunction getCurrentSongIndex() { return 100; };\n` + middlePart + "\nnextSongExists;")
+assert.strictEqual(codeOutputSecondTest, false);
 ```
 
 # --seed--
@@ -593,7 +598,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -657,7 +662,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -732,7 +737,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
index 04e46a4ab73..cedafb01fea 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
@@ -14,13 +14,13 @@ Use an `if` statement to check if `nextSongExists` exists, then call the `playNe
 You should create an `if` statement with the condition `nextSongExists`.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*/)
 ```
 
 You should call the `playNextSong` function inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -583,7 +583,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -647,7 +647,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
index d0ea1ef5e85..b83c088cd3f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
@@ -14,25 +14,25 @@ If there is no next song in the playlist, use the `else` block to reset the `cur
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `currentSong` property of `userData` to `null` in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `songCurrentTime` property of `userData` to `0` in the `else` block of your `if`statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
 ```
 
 # --seed--
@@ -595,7 +595,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -659,7 +659,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
index 0f35a24a07e..d018700ab70 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
@@ -17,28 +17,28 @@ You should call the `pauseSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /pauseSong\(\);?/)
+assert.match(splitter[1], /pauseSong\(\s*\);?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /setPlayerDisplay\(\);?/)
+assert.match(splitter[1], /setPlayerDisplay\(\s*\);?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -636,7 +636,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -775,7 +775,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
@@ -1418,7 +1418,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -1482,7 +1482,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -1557,7 +1557,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
index 516364530fd..7e400a4ac5e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
@@ -26,7 +26,7 @@ Inside the `userData` object create a `songs` property. For the value, spread `a
 Your `userData` object should have a `songs` key set to `[...allSongs]`.
 
 ```js
-assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\],?/);
+assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\]\s*,?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
index 1b5752392d1..416f571a2ab 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
@@ -14,7 +14,7 @@ To handle the current song's information and track its playback time, create a `
 You should not modify the existing `userData` object and its content.
 
 ```js
-assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\.\.\.allSongs\],?\s*/);
+assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\s*\.\.\.allSongs\s*\]\s*,?\s*/);
 ```
 
 Your `userData` object should have a `currentSong` key set to `null`.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
index eaea549b26b..67c923e2b3a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
@@ -9,26 +9,26 @@ dashedName: step-30
 
 Add an `else` block to handle the current song's position in the playlist.
 
-Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData.songCurrentTime`.
+Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData?.songCurrentTime`.
 
 # --hints--
 
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 You should add an `else` block to the existing `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
 ```
 
-You should set `audio.currentTime` to `userData.songCurrentTime` inside the `else` block of your `if` statement.
+You should set `audio.currentTime` to `userData?.songCurrentTime` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\.songCurrentTime;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\?\.songCurrentTime;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
index 6a91762f22a..70a21266b3f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
@@ -20,7 +20,7 @@ assert.match(code, /playlistSongElements\.forEach\(\s*(\(\s*songEl\s*\)|songEl)\
 You should use the `removeAttribute()` method on `songEl` and pass in `"aria-current"`.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(('|")aria-current\1\);?\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(\s*('|")aria-current\1\s*\);?\s*\}\s*\);?/)
 ```
 
 
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -691,7 +691,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
index 2bec12d38e9..4a0c4cdd59c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
@@ -13,10 +13,10 @@ Don't forget you need to interpolate with the dollar sign here.
 
 # --hints--
 
-You should add an `onclick` with the value `playSong(${song.id})` as the second attribute and value of the `button` element.
+You should add an `onclick` attribute with the value `playSong(${song.id})` to the `button` element.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-info\1\s*onclick\s*=\s*('|")playSong\(\$\{song\.id\}\)\2\s*>\s*<span\s+class\s*=\s*('|")playlist-song-title\3\s*>\$\{song\.title\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-artist\4\s*>\$\{song\.artist\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-duration\5\s*>\$\{song\.duration\}<\/span>\s*<\/button>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")playSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
index d256784f421..f5248c514c8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
@@ -28,19 +28,19 @@ Use the `createTextNode()` method to create a `Reset Playlist` text, then assign
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*\}/)
 ```
 
 You should use `document.createTextNode()` to create a `Reset Playlist` text.
 
 ```js
-assert.match(code, /document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 You should assign your created text node to a `resetText` constant.
 
 ```js
-assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -703,7 +703,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
 
 
@@ -766,7 +766,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
index 9e16b40c370..caf8f60883a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
@@ -23,13 +23,13 @@ Pass in a callback function to the `map()` method. The callback function should
 The callback function of your `map()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?.*\)?\s*=>\s*\{\s*\}\)/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(.*\)|[^()]+)\s*=>\s*\{\s*\}\s*\)/)
 ```
 
 Your `map()` method should have a `song` parameter in it's callback function.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?song\)?/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
index 5a14d8d1720..196cdfe1c37 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
@@ -14,20 +14,20 @@ const animals = ["dog", "cat", "horse"];
 animals.indexOf("cat") // 1
 ```
 
-Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData.currentSong`.
+Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData?.currentSong`.
 
 # --hints--
 
 You should return `userData?.songs.indexOf()` inside your `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\()|(\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(|\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
 ```
 
-You should pass in `userData.currentSong` into the `indexOf()` method.
+You should pass in `userData?.currentSong` into the `indexOf()` method.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\(userData\.currentSong\);?)|(\s*{\s*return\s+userData\?\.songs\.indexOf\(userData\.currentSong\);?)/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?|\s*{\s*return\s+userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?\s*})/)
 ```
 
 # --seed--
@@ -625,7 +625,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
index 99c3211b3e4..8bc181eee8f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
@@ -23,7 +23,7 @@ Add the `sort()` method to `userData?.songs`.
 You should add the `sort()` method to `userData?.songs`.
 
 ```js
-assert.match(code, /userData\?\.songs\.sort\(*.\);?/);
+assert.match(code, /userData\?\.songs\.sort\(.*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
index 4ccdc2bea8f..4176be9ab8c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
@@ -18,25 +18,25 @@ The variables will not change, so use `const` to declare them.
 You should use `document.getElementById()` to get the `#author-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 You should assign the `#author-container` element to the variable `authorContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#load-more-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 You should assign the `#load-more-btn` element to the variable `loadMoreBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
index 20135439ad3..46796895689 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
@@ -22,13 +22,13 @@ Make a `GET` request to this URL: `https://cdn.freecodecamp.org/curriculum/news-
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should not have a semi-colon after your `fetch` call.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
index 57cd10d207f..107bde51d14 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
@@ -27,37 +27,37 @@ Again, don't terminate the code with a semi-colon yet.
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain the `.then()` method to your `fetch()` syntax
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(/)
 ```
 
 You should add a `res` parameter to your `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
 ```
 
 Your `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
 ```
 
 You should log the `res` parameter to the console so you can see the `Response` object.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
index 9478c4fc591..1b489fa7d3a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
@@ -16,19 +16,19 @@ Remove `console.log(res)` and implicitly return `res.json()` instead.
 You should remove the `console.log(res)`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*console\.log\(res\)\)/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should implicitly return `res.json()` in your `.then()`.
 
 ```js
-assert.match(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\)/)
+assert.match(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\);/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\);/)
 ```
 
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
index affb0846705..f24a8374aaf 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
@@ -17,7 +17,7 @@ Chain another `.then()` to the existing `.then()` method. This time, pass in `da
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Your first `.then()` should not have a semi-colon.
@@ -29,37 +29,37 @@ assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not not have semi-colon after it.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
index ec3195fee80..e4db931f0b6 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
@@ -18,67 +18,67 @@ Chain `.catch()` to the last `.then()`. Pass in a callback function with `err` a
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not have a semicolon.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\);/)
 ```
 
 You should chain the `.catch()` method to the second `.then()` you already have.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
 ```
 
 You should add an `err` parameter to your `.catch()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
 ```
 
 Your `.catch()` method should have an arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
 ```
 
 Your `.catch()` method should use `console.error()` to log `err` to the console with the text `` `There was an error: ${err}` ``. Don't forget to use backticks.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\)\s*;?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
index 5f3bb70e4d0..d4b42bf8366 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
@@ -48,7 +48,7 @@ assert.match(code, /let\s+authorDataArr/)
 You should set your `authorDataArr` variable to an empty array (`[]`).
 
 ```js
-assert.match(code, /let\s+authorDataArr\s*=\s*\[\];?/)
+assert.match(code, /let\s+authorDataArr\s*=\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
index 30578e45792..e08ebf405a6 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
@@ -14,7 +14,7 @@ Inside your `displayAuthors` function, chain `.forEach()` to `authors`.
 You should chain `.forEach()` to `authors`.
 
 ```js
-assert.match(code, /authors\.forEach\(\)/)
+assert.match(code, /authors\.forEach\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
index 709b3dc54b8..f59b5d4178b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
@@ -34,7 +34,7 @@ assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*/)
 Your callback function should be empty.
 
 ```js
-assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\)\s*=>\s*\{\s*\}\s*\);?/)
+assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
index daceebdc03b..7db103dc2ab 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
@@ -16,7 +16,7 @@ First, remove your `console.log()` statement. Then, assign `data` to the `author
 You should remove the console log showing the `data`.
 
 ```js
-assert.notMatch(code, /console\.log\(data\);/)
+assert.notMatch(code, /console\.log\(\s*data\s*\);/)
 ```
 
 You should assign `data` to the `authorDataArr` variable
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
index 14b6b569e33..5c83368077c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
@@ -22,19 +22,19 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should have a console log with the text `Author Data Array:`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1/)
 ```
 
 You should use comma to separate your `Author Data Array:` text and `authorDataArr`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,/)
 ```
 
 `authorDataArr` should be the second argument of your console log statement.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
index dfd34dfcd3f..a056ab9e88b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
@@ -22,7 +22,7 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should remove the console log statement showing `authorDataArr`
 
 ```js
-assert.notMatch(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.notMatch(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 You should call your `displayAuthors` function.
@@ -34,19 +34,19 @@ assert.match(code, /displayAuthors\(/)
 You should call your `displayAuthors` function and pass in an argument of `authorDataArr.slice()`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first parameter of your `slice()` method should be `startingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second parameter of your `slice()` method should be `endingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\);?/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
index 539dddae56d..5fe3273bef9 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
@@ -34,13 +34,13 @@ assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*/)
 Your `fetchMoreAuthors` function should use arrow syntax.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `fetchMoreAuthors` function should be empty.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*\{\s*\}/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
index 1aef7aee16f..da58d46f375 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
@@ -24,21 +24,21 @@ You should call your `displayAuthors` function and pass in an argument of `autho
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first argument of your `slice()` method should be `startingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second argument of your `slice()` method should be `endingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\)/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
index cd1b89a5d52..62af8988c34 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
@@ -24,13 +24,13 @@ assert.match(code, /loadMoreBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 Your event listener should take `fetchMoreAuthors` as the function to run.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1,\s*fetchMoreAuthors\);?/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1,\s*fetchMoreAuthors\s*\);?/)
 ```
 
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
index e67706dd455..4af629fa52f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
@@ -24,13 +24,13 @@ assert.match(code, /if\s*\(/)
 Your `if` statement should take in `authorDataArr.length <= endingIndex` as its condition.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*/)
 ```
 
 Your `if` statement should be empty.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
index 1fcd651875b..7ae78883b69 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
@@ -28,22 +28,21 @@ assert.match(code, /<p\s*class=("|')bio\1>/);
 You should check if the length of the `bio` text is greater than `50`.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50/)
+assert.match(code, /<p\s*class=("|')bio\1>\s*\$\{\s*bio\.length\s*>\s*50/)
 ```
 
 If the `bio` text is greater than `50` characters, you should extract the first 50 characters with `slice()` and replace the rest with `...`. Don't forget that indexes are zero-based.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:/);
 ```
 
 If the `bio` text is less than 50 characters, use the `bio` text directly.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:\s*bio\s*\}<\/p>/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:\s*bio\s*\}\s*<\/p>/);
 ```
 
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
index 85a07e050ac..b599faf9dba 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
@@ -16,7 +16,7 @@ Inside the `.catch()`, remove the `console.error()` and set the `innerHTML` of t
 You should remove your `console.error` and its text.
 
 ```js
-assert.notMatch(code, /console\.error\(`There\s+was\s+an\s+error:\s+\$\{err\}`\);/)
+assert.notMatch(code, /console\.error\(\s*`There\s+was\s+an\s+error:\s+\$\{err\}`\s*\);/)
 ```
 
 You should access the `innerHTML` of `authorContainer` and set it to a `p` element. Don't forget to surround the `p` element with a template literal.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
index d46b72eef06..ab2a64fa36e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
@@ -96,19 +96,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
index c916b6560a9..0bdc020ebb1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
@@ -120,19 +120,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
index e2da6210edc..6a86840c8b0 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
@@ -111,19 +111,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
index aca559e2685..f2ec6af6883 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
index 44a8b1f9484..883d8442462 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
@@ -7,8 +7,9 @@ dashedName: step-5
 
 # --description--
 
-Now create a `fieldset` with an `id` set to `lunch`, and a corresponding `legend` and `div` element.
+Next, create a `fieldset` element with the `id` set to `lunch`.
 
+Within that element, create a `legend` element with the text `Lunch`, and an empty `div` with the `class` set to `input-container`.
 # --hints--
 
 You should create a second `fieldset` element in your `form`.
@@ -138,19 +139,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
index f06d01dea76..31badb8641f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
index 625a2bf144d..5c2124823a5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
@@ -188,19 +188,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
index ab8effcb65d..c1b9840a972 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
index c56b01054a2..d2cb106292d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
@@ -190,19 +190,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
index ff2b9c6099d..5c2219236e9 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
@@ -196,19 +196,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
index 17aa0aa3373..e0d3624d199 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
index a983cc10cb5..e53383a0385 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
index cf3138c43b5..b14177abd70 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
index 7c8277739f3..d5b38622c93 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
@@ -29,13 +29,13 @@ You should create a variable called `calorieCounter`.
 assert.isDefined(calorieCounter);
 ```
 
-You should use `document.getElementById()` to get the `#calorie-counter` element.
+You should have `document.getElementById('calorie-counter')` in your code.
 
 ```js
 assert.match(code, /document\.getElementById\(\s*('|")calorie-counter\1\s*\)/g);
 ```
 
-You should store the `#calorie-counter` element in a variable called `calorieCounter`.
+You should assign `document.getElementById('calorie-counter')` to your `calorieCounter` variable.
 
 ```js
 assert.equal(calorieCounter, document.getElementById('calorie-counter'));
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
index 524c1bc4a2d..32b17665615 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
index 45e822c22e6..85bed6adf07 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
index 62a09073b64..aeefc6fcb10 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
@@ -7,6 +7,13 @@ dashedName: step-17
 
 # --description--
 
+In programming, it is standard practice to prefix a variable with `is` or `has` to indicate that the variable is a boolean.
+
+```js
+let isRunning = true;
+let hasCompleted = false;
+```
+
 Declare an `isError` variable and set it to `false`, but use `let` so you can reassign it later.
 
 # --hints--
@@ -148,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
index 325ec763650..ee673c303b4 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
@@ -28,7 +28,7 @@ assert.isFunction(cleanInputString);
 Your `cleanInputString` function should take a `str` parameter.
 
 ```js
-assert.match(cleanInputString?.toString(), /\(str\)/);
+assert.match(cleanInputString?.toString(), /\(\s*str\s*\)/);
 ```
 
 `cleanInputString` should be an empty function.
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
index f19a6ef8c93..dc38ad5b3e5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
index 757d484bf1a..5097ab76260 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
index 11b787c6c36..79cf7300e4e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
index eeb163f249a..816a58fdca2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
@@ -7,24 +7,26 @@ dashedName: step-22
 
 # --description--
 
-Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
-
 You will need to check if the array `["+", "-", " "]` does not include the current character. You can use a combination of the <dfn>includes()</dfn> method and the <dfn>!</dfn> operator to do this.
 
 The `.includes()` method returns `true` if the array contains the character, and `false` if not. The logical NOT operator (`!`) will return the opposite of the value of the `.includes()` method.
 
-Here is an example:
+Here is an example checking if the current character is not in the vowels array. If it is not, that current character is pushed into the `consonantArray`:
 
 ```js
-const numbersArray = [1, 2, 3, 4, 5]
-const number = 6
+const inputString = "Hello World";
+const charArray = inputString.split('');
+const consonantArray = [];
 
-if (!numbersArray.includes(number)) {
-  console.log("The number is not in the array.")
+for (let i = 0; i < charArray.length; i++) {
+  if (!['a', 'e', 'i', 'o', 'u'].includes(charArray[i])) {
+    consonantArray.push(charArray[i]);
+  }
 }
-
 ```
 
+Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
+
 # --hints--
 
 Your `for` loop should have an `if` statement.
@@ -37,19 +39,19 @@ Your `for` loop should use `!["+", "-", " "].includes()`.
 
 ```js
 // the loop protection injects code so we have to look at the raw code directly
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(/);
 ```
 
-Your `for` loop should see if `strArray[i]` is found in `["+", "-", " "]`.
+Your `for` loop should see if `!["+", "-", " "].includes(strArray[i])`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?/);
 ```
 
 Your `for` loop should `push` `strArray[i]` to `cleanStrArray`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\[i\]\s*\)\s*;?\s*(\s*\})?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*;?\s*(\s*\})?/);
 ```
 
 # --seed--
@@ -171,19 +173,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
index 52175b70f3f..b81c6bfe4b7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
@@ -168,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
index 1c2cae7b722..74185fed0e7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
index 65bac0d2b15..d4cba89ec19 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
index 440a8abbffd..4664f92a77f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
index 3c32c02f341..201ca7d8e50 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
index eb1d0a0d264..58e5555420c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
index b5ef4da5762..71438117edf 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
index 0be1d0c4fd6..2af798c1874 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
index 1b74024e42b..8742424ca3f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
index 0f332671811..65267a15d86 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
index ce1d83ce399..06b80a334b0 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
index bf764b0c888..3f6c0d5b3d2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
index cc518396b16..a1e4484dd21 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
@@ -6,8 +6,13 @@ dashedName: step-35
 ---
 
 # --description--
+Strings have a <dfn>.match()</dfn> method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
 
-Strings have a `.match()` method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
+```js
+const str = 'example string';
+const regex = /example/;
+const result = str.match(regex); // Returns ['example']
+```
 
 Return the result of calling the `.match()` method on `str` and passing your `regex` variable as the argument. You'll use this match result later on.
 
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
index ca7457aca4d..03fe9be499a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
index b3e0b8996c2..faaf9df1da3 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
index 58651e00653..80df517e1b4 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
index 325d63c5284..9d31d1b3fd2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
@@ -26,13 +26,13 @@ Replace your concatenated string in the `querySelector` with a template literal
 You should use a template literal in your `querySelector` method.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`.*`\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`.*`\s*\)/);
 ```
 
 Your template literal should have the value `{targetId} .input-container`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`\$\{targetId\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`\$\{targetId\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
index adec2b9c64a..8ab04dec869 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
@@ -20,13 +20,13 @@ assert.notMatch(addEntry.toString(), /targetId\s*=/);
 You should replace the `targetId` reference in your template literal with `entryDropdown.value`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 You should add `#` at the beginning of your template literal.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
index 419988c03a0..485fc7c59aa 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
index c87ec2f3862..0ae4e1e1bb8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
@@ -24,13 +24,13 @@ assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.query
 You should access the `length` property of your `querySelectorAll()`.
 
 ```js
-assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 Your `entryNumber` variable should be the `length` of the `querySelectorAll`.
 
 ```js
-assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 # --seed--
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
index 921e430a0b7..82ace3a451a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
index cbe89d13ff2..6629c807dfe 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
@@ -20,7 +20,7 @@ assert.match(code, /HTMLString\s*=\s*`\n\s*<label>.*<\/label>/);
 Your `label` element should have the text `Entry ${entryNumber} Name`.
 
 ```js
-assert.match(code, /HTMLString\s*=\s*`\n\s*<label>Entry\s\$\{entryNumber\}\sName<\/label>/);
+assert.match(code, /HTMLString\s*=\s*`\n\s*<label>\s*Entry\s\$\{entryNumber\}\sName\s*<\/label>/);
 ```
 
 # --seed--
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
index ce946048bc2..9e306622ea5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
index f06e5fe55d9..7842337835d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
index fdabe2b9661..2e874f0ab53 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
index e0f8712b84a..4f0325026ba 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
@@ -185,19 +185,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
index 4669439e11b..835ecd6474b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
@@ -172,19 +172,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
index d5f6cb48d29..9262013b3a7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
index a1243ec66bf..1e9415f1769 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
index 8e235bf5b69..8a60ef2ed54 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
@@ -146,19 +146,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
index 052722cfe80..2bdaa8fd775 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
index 2687a1464cd..80c77a28faa 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
@@ -9,7 +9,25 @@ dashedName: step-50
 
 In the Role Playing Game project, you learned how to set a button's behavior by editing its `onclick` property. You can also edit an element's behavior by adding an event listener.
 
-Call the `.addEventListener()` method of the `addEntryButton`. It takes two arguments. The first is the event to listen to – you should pass the string `click`. The second is the callback function, or the function that runs when the event is triggered. Pass the `addEntry` function as the second argument. Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
+The following example uses the `addEventListener` method to add a click event to a button. When the button is clicked, the `printName` function is called.
+
+```html
+<button class="btn">Print name</button>
+```
+
+```js
+const button = document.querySelector('.btn');
+function printName() {
+  console.log("Jessica");
+}
+button.addEventListener('click', printName);
+```
+
+The `addEventListener` method takes two arguments. The first is the event to listen to. (Ex. `'click'`) The second is the callback function, or the function that runs when the event is triggered.
+
+Call the `.addEventListener()` method on the `addEntryButton`. Pass in the string `click` for the first argument and the `addEntry` function for the second argument.
+
+Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
 
 # --hints--
 
@@ -150,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
index 2df8802149f..9da3143f753 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
index a075296347d..c0c2e49d7f7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
@@ -7,34 +7,26 @@ dashedName: step-56
 
 # --description--
 
-The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is an array-like which contains the elements that match the query selector.
+The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is a list of elements like an array. It contains the elements that match the query selector. You will need to loop through these elements in the list.
 
-You'll need to loop through these elements, so start by creating a `for` loop. Your iterator `i` should start at `0`, continue while it is less than the length of the list, and increment by `1` each iteration.
+In previous steps, you learned how to loop through an array using a `for` loop. You can also use a <dfn>for...of</dfn> loop to loop through an array and a `NodeList`.
+
+A `for...of` loop is used to iterate over elements in an iterable object like an array. The variable declared in the loop represents the current element being iterated over.
+
+```js
+for (const element of elementArray) {
+  console.log(element);
+}
+```
+
+Create a `for...of` loop that loops through the list. For the loop's variable name, use `const` to declare a variable called `item`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should have a `for` loop.
+You should have a `for...of` loop that loops through the `list` parameter. Use `item` for the loop's variable name.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(/g);
-```
-
-Your `for` loop should initialize a variable called `i` to `0`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;/g);
-```
-
-Your `for` loop should have a condition that checks if `i` is less than the length of `list`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;/g);
-```
-
-Your `for` loop should increment `i` by `1` each time it runs. Use the increment operator for this.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)/g);
+assert.match(code, /for\s*\(\s*const\s+item\s+of\s+list\s*\)\s*\{/);
 ```
 
 # --seed--
@@ -156,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
index 945319ed2d9..1f795e4bef1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
@@ -9,40 +9,20 @@ dashedName: step-57
 
 The `NodeList` values you will pass to `list` will consist of `input` elements. So you will want to look at the `value` attribute of each element.
 
-Assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
+Assign `item.value` to a `const` variable called `currVal`.
 
 # --hints--
 
-You should have a `currVal` variable.
+You should use `const` to declare a new variable called `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=/);
+assert.match(code, /const\s+currVal\s*=/);
 ```
 
-You should access the element in `list` at index `i` using bracket notation.
+You should assign `item.value` to `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]/);
-```
-
-You should access the `value` attribute of the element in `list` at index `i`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]\.value/);
-```
-
-You should assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*list\[i\]\.value/);
-```
-
-Your `currVal` assignment should be in your `for` loop.
-
-```js
-// another hack, because the loop protection injects stuff
-const getCaloriesString = code.split("function getCaloriesFromInputs")[1];
-assert.match(getCaloriesString, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*(const|let)\s+currVal\s*=\s*list\[i\]\.value/g);
+assert.match(code, /const\s+currVal\s*=\s*item\.value/);
 ```
 
 # --seed--
@@ -164,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,15 +224,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
+  --fcc-editable-region--
+  for (const item of list) {
 
   }
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
index 2bb3f693307..0d4595e24f5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
@@ -9,26 +9,26 @@ dashedName: step-58
 
 Remember that you wrote a function earlier to clean the user's input? You'll need to use that function here.
 
-Update your `currVal` declaration to be the result of calling `cleanInputString` with `list[i].value`.
+Update your `currVal` declaration to be the result of calling `cleanInputString` with `item.value`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should call your `cleanInputString` function.
+You should call the `cleanInputString` function inside the `getCaloriesFromInputs` function.
 
 ```js
 assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(/);
 ```
 
-You should pass `list[i].value` as the argument for `cleanInputString`.
+You should pass `item.value` as the argument for `cleanInputString` function.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 You should assign the result of your `cleanInputString` call to your `currVal` variable.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(code, /const\s+currVal\s*=\s*cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -238,15 +231,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = list[i].value;
+  for (const item of list) {
+    --fcc-editable-region--
+    const currVal = item.value;
+    --fcc-editable-region--
   }
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
index e473ee06492..98d7c1368ec 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -239,8 +232,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
 
   }
 }
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
index 64251f3e316..d9f7de36f39 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,8 +244,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
index 1e3a62ba05c..ac99bf89315 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
@@ -23,13 +23,13 @@ You should use a template literal to pass the `Invalid Input:` message to the `a
 
 ```js
 // because it transforms template literals...
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: /);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: /);
 ```
 
-You should use template literal syntax to display the first value in the `invalidInputMatch` array after the `Invalid Input:` text.
+You should display the first element of the `invalidInputMatch` array after the `Invalid Input:` text by using a template literal.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\)/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\)/);
 ```
 
 # --seed--
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
index d81577de4b2..25313e2bd12 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
@@ -7,6 +7,8 @@ dashedName: step-62
 
 # --description--
 
+In programming, `null` is meant to represent the absence of a value. In this case, if the user enters an invalid input, you want to alert them and then return `null` to indicate that the function has failed.
+
 Still within your `if` block, set `isError` to `true` and return `null`.
 
 # --hints--
@@ -14,13 +16,13 @@ Still within your `if` block, set `isError` to `true` and return `null`.
 After your `alert`, you should set `isError` to `true`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true/);
 ```
 
 After you modify `isError`, you should `return` the value `null`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
 ```
 
 # --seed--
@@ -142,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -233,8 +228,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
index 91b581727bc..b25bfdcd28e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
@@ -17,6 +17,7 @@ Here is an example:
 
 ```js
 Number('10'); // returns the number 10
+Number('abc'); // returns NaN
 ```
 
 # --hints--
@@ -164,19 +165,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +249,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
index e9475cbad7f..f37f3593565 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
@@ -17,12 +17,6 @@ You should `return` the `calories` value.
 assert.match(getCaloriesFromInputs.toString(), /return\s+calories/);
 ```
 
-Your new `return` statement should come after your `for` loop.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /calories\s*\+=\sNumber\(currVal\);\n\s*}\n\s*return\s+calories/)
-```
-
 # --seed--
 
 ## --seed-contents--
@@ -142,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -229,12 +216,11 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -244,9 +230,10 @@ function getCaloriesFromInputs(list) {
     }
     calories += Number(currVal);
   }
+  --fcc-editable-region--
 
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
index da63046ffb2..4ae1d740428 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
@@ -26,7 +26,7 @@ assert.isFunction(calculateCalories);
 Your `calculateCalories` function should take an `e` argument.
 
 ```js
-assert.match(calculateCalories?.toString(), /\(e\)/);
+assert.match(calculateCalories?.toString(), /\(\s*e\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
index 177aee164dd..e46c1f08704 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
@@ -16,7 +16,7 @@ Add a line to your `calculateCalories` function that calls the `preventDefault()
 Your `calculateCalories` function should call `e.preventDefault()`.
 
 ```js
-assert.match(calculateCalories.toString(), /e\.preventDefault\(\)/);
+assert.match(calculateCalories.toString(), /e\.preventDefault\(\s*\)/);
 ```
 
 Your `calculateCalories` function should reset the global error flag to `false`.
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -240,8 +233,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
index 34ad7b3a2d0..513f2103621 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
@@ -22,13 +22,13 @@ assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#breakfast input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `odocument.querySelectorAll()` call to `breakfastNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -249,8 +242,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
index f02f2ad7914..31be911bd2e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#lunch input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `lunchNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -248,8 +241,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
index a1019016c7d..ed360a2a228 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#dinner input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `dinnerNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `snacksNumberInputs` variable.
@@ -38,13 +38,13 @@ assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#snacks input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `snacksNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `exerciseNumberInputs` variable.
@@ -56,13 +56,13 @@ assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#exercise input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `exerciseNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -285,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
index 1be2a19e4c4..e5b00759d90 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +248,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
index c94506e6d47..87e3fa0422f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -254,8 +247,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
index ca952a5c185..26377e2befc 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -291,8 +284,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
index 0a6cc0f0a56..74caa9f51b3 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -262,8 +255,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
index 516450c0c6c..29dd1490781 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -260,8 +253,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
index 0e19227afaa..46c926e3891 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -270,8 +263,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
index d3045c10dc9..e717013952d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -265,8 +258,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
index d0b3f89c6a0..70278086cf1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
@@ -162,19 +162,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +273,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
index 2456ecd8cd8..8facf52cefa 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
@@ -7,7 +7,7 @@ dashedName: step-78
 
 # --description--
 
-You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element.
+You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element on a new line at the end of the function.
 
 # --hints--
 
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -263,8 +256,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
index 0cc90d6df06..08b43c44039 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
@@ -7,9 +7,16 @@ dashedName: step-79
 
 # --description--
 
-Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable, but lowercased.
+When you need to lower case a string, you can use the <dfn>toLowerCase()</dfn> method. This method returns the calling string value converted to lower case.
 
-Strings have a `.toLowerCase()` method that can help you with this. Do not give your `span` any text yet.
+```js
+const firstName = 'JESSICA';
+console.log(firstName.toLowerCase()); // Output: jessica
+```
+
+Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable. Your `surplusOrDeficit` variable should be converted to lower case using the `toLowerCase()` method.
+
+Do not give your `span` any text yet.
 
 # --hints--
 
@@ -160,19 +167,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -279,8 +279,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
index 8d740a8d970..29e74ec0700 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -258,8 +251,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
index 43b466b97c8..3a0fa5dc2a4 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
@@ -9,7 +9,14 @@ dashedName: step-81
 
 When the user has a calorie deficit, the `remainingCalories` value will be negative. You don't want to display a negative number in the result string.
 
-`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number. In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
+`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number.
+
+```js
+const num = -5;
+Math.abs(num); // 5
+```
+
+In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
 
 # --hints--
 
@@ -24,7 +31,7 @@ Your `span` should have the text `${Math.abs(remainingCalories)} Calorie ${surpl
 
 ```js
 const htmlString = code.split(/output\s*\.\s*innerHTML\s*=\s*/)[1].split(/`/)[1];
-assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(remainingCalories\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
+assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(\s*remainingCalories\s*\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
 ```
 
 # --seed--
@@ -146,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -267,8 +267,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
index 316f33b2dff..b0d0c4d1f65 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
index 383432aa514..e54eedb9b20 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -283,8 +276,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
index acbea79c5ab..1944009238b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
@@ -158,19 +158,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -282,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
index 8e0a1b62c65..31a8c825ed3 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
@@ -9,6 +9,11 @@ dashedName: step-85
 
 Finally, you need to make the `#output` element visible so the user can see your text. Your `output` variable is an Element, which has a `classList` property. This property has a `.remove()` method, which accepts a string representing the class to remove from the element.
 
+```js
+const paragraphElement = document.getElementById('paragraph');
+paragraphElement.classList.remove('hide');
+```
+
 Use the `.remove()` method of the `output` variable's `classList` property to remove the `hide` class. Don't forget to place the word `hide` inside quotes.
 
 # --hints--
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -277,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
index 7de57e18d31..c131f339318 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
index 945adf7abc4..814101eb244 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
index 192784e194a..e69bf8c73d0 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
index 57a5d7d4168..9376d9bbf17 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
@@ -9,6 +9,22 @@ dashedName: step-89
 
 Remember that `document.querySelectorAll` returns a `NodeList`, which is array-like but is not an array. However, the `Array` object has a `.from()` method that accepts an array-like and returns an array. This is helpful when you want access to more robust array methods, which you will learn about in a future project.
 
+The following example takes a `NodeList` of `li` elements and converts it to an array of `li` elements:
+
+```html
+<ul>
+  <li>List 1</li>
+  <li>List 2</li>
+  <li>List 3</li>
+</ul>
+```
+
+```js
+const listItemsArray = Array.from(document.querySelectorAll('li'));
+
+console.log(listItemsArray); //Output: (3) [li, li, li]
+```
+
 Wrap your `inputContainers` query selector in `Array.from()`. Do this on the same line as your declaration.
 
 # --hints--
@@ -144,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -269,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
index 78322d07e28..655d3624d29 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
@@ -7,33 +7,25 @@ dashedName: step-90
 
 # --description--
 
-It is time for another loop. Use a `for` loop to iterate through the `inputContainers` array.
+It is time for another loop. Create a `for...of` loop with a variable called `container` to iterate through the `inputContainers` array.
 
-Inside the loop, set the `innerHTML` property of the element at the current index to an empty string. This will clear all of the contents of that input container.
+Inside the loop, set the `innerHTML` property of the `container` to an empty string. This will clear all of the contents of that input container.
 
 # --hints--
 
-Your `clearForm` function should have a `for` loop.
+Your `for...of` loop should iterate through the `inputContainers` array. The loop's variable name should be `container`.
 
 ```js
-// loop protect injects stuff, so let's look at the raw code again
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(/);
+assert.match(clearForm, /for\s*\(\s*const\s+container\s+of\s+inputContainers\s*\)/);
 ```
 
-Your `for` loop should iterate through the `inputContainers` array. Remember to use `i` as your iterator.
+Your `for...of` loop should set the `innerHTML` property of `container` to an empty string.
 
 ```js
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*inputContainers\.length\s*;\s*i\s*\+\+\s*\)/);
-```
-
-Your `for` loop should set the `innerHTML` property of `inputContainers[i]` to an empty string.
-
-```js
-const clearForm = code.split("function clearForm()")[1];
-const forLoop = clearForm.split("for")[1];
-assert.match(forLoop, /inputContainers\[\s*i\s*\]\s*\.innerHTML\s*=\s*(`|'|")\1\s*/);
+const forOfLoop = clearForm.split("for")[1];
+assert.match(forOfLoop, /container\s*\.\s*innerHTML\s*=\s*(`|'|")\1\s*/);
 ```
 
 # --seed--
@@ -155,19 +147,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +265,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
index a1da97dc9a7..2350e6984dc 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
index 398d0f0f45e..da7762ac3ce 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
index ba2b3eef72c..c96f44e7b52 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
index 7acb5efbf7a..975aea49863 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -292,8 +285,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
@@ -425,19 +418,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -550,8 +536,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -567,8 +553,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
index d61574e8c5c..9537c732956 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
@@ -16,13 +16,13 @@ In your `createLabel` function, declare a `label` variable and assign it a new `
 You should declare a `label` variable in your `createLabel` function.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*(?:const|let|var)\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*(?:const|let|var)\s+label/);
 ```
 
 Your `label` variable should be declared with `const`.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*const\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*const\s+label/);
 ```
 
 You should use the `.createElement()` method of the `document` object.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
index e5f0c3cad08..6fb641e2404 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
@@ -22,7 +22,7 @@ assert.match(code, /letters\.forEach\(/);
 You should pass your `createLabel` function reference to the `.forEach()` method.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*createLabel\s*\)/);
+assert.match(code, /letters\.forEach\(\s*(?:\(\s*([\S]*)\s*\)|\s*([\S]*))\s*=>\s*createLabel\(\s*\1\2\s*\)\s*\)|letters\.forEach\(\s*createLabel\s*\)/);
 ```
 
 You should not pass a `createLabel` function call.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
index cfc5d586072..96312218f65 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-In your callback, call `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
+In your callback, you will need to make two function calls. Start by calling `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
 
 Then call the `.forEach()` method on your `letters` array. Pass an empty callback function which takes a `letter` parameter.
 
@@ -46,7 +46,13 @@ assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{/)
 Your callback function should be empty.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{\s*\}/)
+assert.match(code, /letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}/)
+```
+
+Your `letters.forEach()` callback function should be nested inside the `range(1, 99).forEach(number => {}` callback function.
+
+```js
+assert.match(code, /range\s*\(\s*1\s*,\s*99\s*\)\s*.forEach\s*\(\s*(\(\s*number\s*\)|number)\s*=>\s*\{\s*[^}]*letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}\s*\)\s*\}\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
index 97a8b118221..e79a50b432a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
@@ -9,8 +9,6 @@ dashedName: step-17
 
 Now in your nested `.forEach()` call, declare an `input` variable. Use the `.createElement()` method of the `document` object to create an `input` element. Set the `type` attribute to `text` and the `id` attribute to `letter + number`.
 
-For accessibility, set the `aria-label` attribute to the same value as the `id` attribute.
-
 # --hints--
 
 You should declare an `input` variable.
@@ -67,18 +65,6 @@ You should set the `id` attribute of your `input` element to `letter + number`.
 assert.match(code, /input\.id\s*=\s*letter\s\+\snumber/)
 ```
 
-You should access the `ariaLabel` property of your `input` element.
-
-```js
-assert.match(code, /input\.ariaLabel/);
-```
-
-You should set the `aria-label` attribute of your `input` element to `letter + number`.
-
-```js
-assert.match(code, /input\.ariaLabel\s*=\s*letter\s\+\snumber/)
-```
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
index 274c295823a..42633bfd960 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
@@ -1,8 +1,8 @@
 ---
 id: 643498328cb52026123e2b91
-title: الخطوة 18
+title: Step 19
 challengeType: 0
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
index 665250339f4..8d1ddcd5fb5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
@@ -1,8 +1,8 @@
 ---
 id: 643498755d54c6279ba09078
-title: الخطوة 19
+title: Step 20
 challengeType: 0
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
index b2389df2782..9d06932a530 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
@@ -1,8 +1,8 @@
 ---
 id: 6437124c4c03dd4c8fb35d56
-title: الخطوة 20
+title: Step 21
 challengeType: 0
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
index 62c7181c641..58e532930ff 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
@@ -1,8 +1,8 @@
 ---
 id: 6437133052eaf04d7300e622
-title: الخطوة 21
+title: Step 22
 challengeType: 0
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
index 0cc8c16a95d..b23e311ab0e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
@@ -1,8 +1,8 @@
 ---
 id: 643715013330824ecaa70442
-title: الخطوة 22
+title: Step 23
 challengeType: 0
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
index be51b6188b2..deb4a393803 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d1e5af8c0148fbef96d
-title: الخطوة 23
+title: Step 24
 challengeType: 0
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
index dee4a002af4..8c9bacddb49 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d80bc174a158c973080
-title: الخطوة 24
+title: Step 25
 challengeType: 0
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
@@ -50,19 +50,19 @@ assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*n
 The first element of the array passed to `average()` should be the element at the `middle` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]/);
 ```
 
 The first element of the array passed to `average()` should be the element at the `middle + 1` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\)/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)/);
 ```
 
 If the ternary is false, you should return the value of `sorted` at the `middle` index. Use `Math.ceil()` to round the `middle` value up.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\[\s*Math\.ceil\(\s*middle\s*\)\s*\];?/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\s*\[\s*Math\.ceil\(\s*middle\s*\)\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
index 78087d4a45f..efe3f42753d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
@@ -1,8 +1,8 @@
 ---
 id: 64496df724dd3716a71fe971
-title: الخطوة 25
+title: Step 26
 challengeType: 0
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
index 7bafdc414df..7b8b7d9ffe6 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
@@ -1,8 +1,8 @@
 ---
 id: 64496e9c6d7a2e189948e441
-title: الخطوة 26
+title: Step 27
 challengeType: 0
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
index 904790499bb..52e6a20efa0 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
@@ -1,8 +1,8 @@
 ---
 id: 6449749d20436c1f1dfadcf2
-title: الخطوة 27
+title: Step 28
 challengeType: 0
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
index bda81c43323..63c290f2fb7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
@@ -1,8 +1,8 @@
 ---
 id: 6449755666005520330cec5b
-title: الخطوة 28
+title: Step 29
 challengeType: 0
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
index f9eeb980905..1dc1617bd6e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
@@ -1,8 +1,8 @@
 ---
 id: 64497da4062602213ecf32e7
-title: الخطوة 29
+title: Step 30
 challengeType: 0
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
index fb76e07515e..e018fb06bbf 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
@@ -1,8 +1,8 @@
 ---
 id: 64497de936a2f322327e5c58
-title: الخطوة 30
+title: Step 31
 challengeType: 0
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
index a676c2e7a06..9a418bcf2fb 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e0e5e5a2c2329785af4
-title: الخطوة 31
+title: Step 32
 challengeType: 0
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
@@ -16,7 +16,7 @@ Use the `&&` operator to add a second condition to your `if` statement that also
 You should use the `&&` operator to add a second condition to your `if` statement that also checks if the first character of `value` is `=`. You may use `[0]`, `.startsWith()`, or `.charAt(0)`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
index 1131e14ddc3..cea5d468a27 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e764135bd24b7960dd3
-title: الخطوة 32
+title: Step 33
 challengeType: 0
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
index 52be65921d4..117a075e0f3 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
@@ -1,8 +1,8 @@
 ---
 id: 6449842c6f6c84261075e4c9
-title: الخطوة 33
+title: Step 34
 challengeType: 0
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
index 017bee37cae..f331b2e13dc 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
@@ -1,8 +1,8 @@
 ---
 id: 64498473a17adc26ef0ecc2d
-title: الخطوة 34
+title: Step 35
 challengeType: 0
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
index 9786482c7de..869aa786b1b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
@@ -1,8 +1,8 @@
 ---
 id: 6449849b78f43527be1e8a98
-title: الخطوة 35
+title: Step 36
 challengeType: 0
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
index e99d6b5fc48..379d979b83e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
@@ -1,8 +1,8 @@
 ---
 id: 64498542cab69128ab24e4de
-title: الخطوة 36
+title: Step 37
 challengeType: 0
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
index 8c16abd97c2..db2048f5154 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
@@ -1,8 +1,8 @@
 ---
 id: 6449860d84c9e22cbd7b497c
-title: الخطوة 37
+title: Step 38
 challengeType: 0
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
index 759bbc87afd..1d217df30cf 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
@@ -1,8 +1,8 @@
 ---
 id: 6449863f592af72d9be0959e
-title: الخطوة 38
+title: Step 39
 challengeType: 0
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
index fbae29e7295..97250208fe7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
@@ -1,8 +1,8 @@
 ---
 id: 6449874d5191562eb3313b3f
-title: الخطوة 39
+title: Step 40
 challengeType: 0
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
index cbd7528e91e..f48039d757e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
@@ -1,8 +1,8 @@
 ---
 id: 6449876e7aae0d2f8257a497
-title: الخطوة 40
+title: Step 41
 challengeType: 0
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
index 9476c4f1125..6e3f9b611c6 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
@@ -1,8 +1,8 @@
 ---
 id: 64498b085028fc30a58bb6a7
-title: الخطوة 41
+title: Step 42
 challengeType: 0
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
index ebaf8b35117..d0a3366315c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0889c6ff4baa46ac1c50
-title: الخطوة 42
+title: Step 43
 challengeType: 0
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
index d5984cf114c..716a7d4ca9a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
@@ -1,8 +1,8 @@
 ---
 id: 646d09a07241aaab1e777080
-title: الخطوة 43
+title: Step 44
 challengeType: 0
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
index c7a31c0ac82..b8692bdd19c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0a022da7bcabf3e3aca3
-title: الخطوة 44
+title: Step 45
 challengeType: 0
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
index 77afe6fc0d8..c412e30095a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0d20108440acc95a6b32
-title: الخطوة 45
+title: Step 46
 challengeType: 0
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
index 041624da1c7..e8720b88a53 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0db5175974ad8633b71c
-title: الخطوة 46
+title: Step 47
 challengeType: 0
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
index 43c5c0a0114..d5c1b76abff 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0e4636e14eae2bb3b992
-title: الخطوة 47
+title: Step 48
 challengeType: 0
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
index d7b73c3ab3c..bce3cb02167 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1980018efaaec2b1c28b
-title: الخطوة 48
+title: Step 49
 challengeType: 0
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
index 7e525992e8f..7f8eb0a90b8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
@@ -1,8 +1,8 @@
 ---
 id: 646d19fc4705e4af65c3e688
-title: الخطوة 49
+title: Step 50
 challengeType: 0
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
index 499884210b3..7dd3a87d588 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1b96dd7ea4b0061458bc
-title: الخطوة 50
+title: Step 51
 challengeType: 0
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
index d1d3b26eaa9..fb0d686e40d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
@@ -1,13 +1,13 @@
 ---
 id: 646d1cadf0d96ab0b7e12da4
-title: الخطوة 51
+title: Step 52
 challengeType: 0
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
 
-Because `elemValue` returns a function, your `addChars` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
+Because `elemValue` returns a function, your `addCharacters` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
 
 <!-- TODO: Explain further? -->
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
index acc70984b96..c1ef0ae4591 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1d67f9261fb15a795588
-title: الخطوة 52
+title: Step 53
 challengeType: 0
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
index a16be97723c..81a967ea80d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1e531042dfb24da1f032
-title: الخطوة 53
+title: Step 54
 challengeType: 0
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
@@ -16,13 +16,13 @@ The callback function takes a few parameters. The first is the matched string. P
 You should pass an arrow function as the second argument to your `.replace()` method.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 Your arrow function should take a `match` parameter.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
index 3d486841267..4e0bdcafe1b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3141790b3cb337dd611a
-title: الخطوة 54
+title: Step 55
 challengeType: 0
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
index b39207c5ea5..a976d2e313d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
@@ -1,8 +1,8 @@
 ---
 id: 646d382c4d70ceb3dba1e830
-title: الخطوة 55
+title: Step 56
 challengeType: 0
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
index 3bfdd0ffb34..7a1435a9e93 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
@@ -1,8 +1,8 @@
 ---
 id: 646d386a685620b49db4be76
-title: الخطوة 56
+title: Step 57
 challengeType: 0
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
index e6fe3425d58..c6980b6b44a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38c326f3c8b54023de38
-title: الخطوة 57
+title: Step 58
 challengeType: 0
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
index 6caa851d0ae..0af42bfb322 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38f906b94cb5fe6ce7de
-title: الخطوة 58
+title: Step 59
 challengeType: 0
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
index 94c89673029..daa12199dcb 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3952f6af37b6a1c241c2
-title: الخطوة 59
+title: Step 60
 challengeType: 0
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
index 96ed69f3f88..e9f8b5ce15d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
@@ -1,8 +1,8 @@
 ---
 id: 646d39c156fe94b7482c3ab6
-title: الخطوة 60
+title: Step 61
 challengeType: 0
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
index 31f6e68435f..3fa9bd07097 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3b27cd3c56b875256301
-title: الخطوة 61
+title: Step 62
 challengeType: 0
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
index 53e78ebb332..4e1043eecb1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3bc75fe0c9b972da3323
-title: الخطوة 62
+title: Step 63
 challengeType: 0
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
index 0271a39bd9a..ec294284249 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3c146e10b0ba222bb2a7
-title: الخطوة 63
+title: Step 64
 challengeType: 0
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
index 5fde07db7b9..747899bb3e3 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d037872fbbae0a8ec0e
-title: الخطوة 64
+title: Step 65
 challengeType: 0
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
index fb77c12b5b0..022a6c568cb 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d65be79c8bb9c7df9ff
-title: الخطوة 65
+title: Step 66
 challengeType: 0
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
index 82a20a84b26..9615d7f929a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d80c3b4aebc4103618e
-title: الخطوة 66
+title: Step 67
 challengeType: 0
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
index 743d299100c..196385d39b2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3da8501e15bcd355ba1d
-title: الخطوة 67
+title: Step 68
 challengeType: 0
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
index b888e442994..3cb7c61d53f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e135ab3abbdbfe5c899
-title: الخطوة 68
+title: Step 69
 challengeType: 0
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
index dad985a7431..8c653ee86f4 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e64b15f92be6e61704e
-title: الخطوة 69
+title: Step 70
 challengeType: 0
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str
 Your callback function should use bracket notation to access the property of the `infixToFunction` object that matches the value of the `operator` parameter.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
index 0ede7a73326..cd6d06d7e99 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3ee7b17ae3bf48610033
-title: الخطوة 70
+title: Step 71
 challengeType: 0
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
@@ -14,19 +14,19 @@ dashedName: step-70
 Your callback function should return the result of calling `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(/);
 ```
 
 You should pass `arg1` as the first argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1/);
 ```
 
 You should pass `arg2` as the second argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
index d12db78e5a1..2145e640b31 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f1fd12f76c02c823bb8
-title: الخطوة 71
+title: Step 72
 challengeType: 0
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
@@ -16,13 +16,13 @@ Wrap each of your `infixToFunction[operator]` arguments in a `parseFloat()` call
 You should wrap `arg1` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
 ```
 
 You should wrap `arg2` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
index 7e67a0430d9..f9fcf26f42e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f718b5f8dc102cd528e
-title: الخطوة 72
+title: Step 73
 challengeType: 0
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
index ce6db7dbed7..d7bdc37d7b2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
@@ -1,8 +1,8 @@
 ---
 id: 646d404259f512c1a9e86ac1
-title: الخطوة 73
+title: Step 74
 challengeType: 0
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
index 6b276d9a57a..167d450138d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40c543943ec250039682
-title: الخطوة 74
+title: Step 75
 challengeType: 0
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
index 62a91b68b98..660a596da8e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40fe4b7b50c30c2b4cd8
-title: الخطوة 75
+title: Step 76
 challengeType: 0
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
index 35d6143ed1a..0bc08a4012e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
@@ -1,8 +1,8 @@
 ---
 id: 646d41e23b583fc3b8cc4579
-title: الخطوة 76
+title: Step 77
 challengeType: 0
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
index 53f3b181fa8..16562b4bb2f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
@@ -1,8 +1,8 @@
 ---
 id: 646d423fade4a9c4636acd13
-title: الخطوة 77
+title: Step 78
 challengeType: 0
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
index 6ed6ee55df4..efc5d0ffc18 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
@@ -1,8 +1,8 @@
 ---
 id: 646d42f58deb2fc52adc6611
-title: الخطوة 78
+title: Step 79
 challengeType: 0
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
index f57ec3a21e5..02383be897f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d43587d926bc5b6cb2e50
-title: الخطوة 79
+title: Step 80
 challengeType: 0
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
index 9e684c43f3a..1ea064565a1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d448479c8fdc8dcec868c
-title: الخطوة 80
+title: Step 81
 challengeType: 0
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
index c07c129f308..b6fe908bbf8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d44da986f2bc9b72f5fe2
-title: الخطوة 81
+title: Step 82
 challengeType: 0
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
index 01bceb8fe2c..3d6821dadd1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
@@ -1,8 +1,8 @@
 ---
 id: 646d451c2e44afca71b67818
-title: الخطوة 82
+title: Step 83
 challengeType: 0
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
index 24c5ce2b127..18d0465bd29 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4554721d43cb19a68bc4
-title: الخطوة 83
+title: Step 84
 challengeType: 0
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
@@ -28,13 +28,13 @@ assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*cons
 Your `apply` function should access the property of the `spreadsheetFunctions` object that matches the `fn` value.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn/);
 ```
 
 Your `apply` function should call the `.toLowerCase()` method on `fn` in the property access.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]/);
 ```
 
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
index 2fd6cc0494e..b14d113cdfd 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45b739da5ecbf830c108
-title: الخطوة 84
+title: Step 85
 challengeType: 0
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Your `apply` function is returning the spreadsheet function, but not actually ap
 Your `apply` function should call the `spreadsheetFunctions[fn.toLowerCase()]` function.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(/);
 ```
 
 You should pass a `toNumberList()` call to your `spreadsheetFunctions[fn.toLowerCase()]` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(/);
 ```
 
 You should pass `args` to your `toNumberList()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
index 229a48777b0..95734fb4ffe 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45ee725632cca2555146
-title: الخطوة 85
+title: Step 86
 challengeType: 0
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Now your `applyFunction` needs to return a result. Return the result of calling
 Your `applyFunction` function should return the result of calling the `.replace()` method on `str2`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(/);
 ```
 
 You should pass `functionCall` as the first argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall/);
 ```
 
 You should pass an empty arrow function as the second argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
 ```
 
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
index d27ed063b7b..8eb18bbd464 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4626420eeecd51f241c2
-title: الخطوة 86
+title: Step 87
 challengeType: 0
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Remember to make `fn` lower case.
 Your callback function should have `match` as the first parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
 ```
 
 Your callback function should have `fn` as the second parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
 ```
 
 Your callback function should have `args` as the third parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
 ```
 
 Your callback function should use an implicit return.
 
 ```js
-assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
+assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
 ```
 
 Your callback function should return the result of calling the `.hasOwnProperty()` method on the `spreadsheetFunctions` object.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
 ```
 
 You should pass `fn` to the .`hasOwnProperty()` method.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn/);
 ```
 
 You should call the `.toLowerCase()` method on `fn`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
index 4a3982e5a19..1fd62328533 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d467c6994f4ce0dc416a4
-title: الخطوة 87
+title: Step 88
 challengeType: 0
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
@@ -14,31 +14,31 @@ Use the ternary operator to turn your `.hasOwnProperty()` call into the conditio
 Your callback function should use ternary syntax.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
 ```
 
 If the ternary condition is true, your callback function should return the result of calling `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\s*\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\s*\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
 ```
 
 You should pass `fn` as the first argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
 ```
 
 You should pass `args` as the second argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
 ```
 
 If the ternary is false, you should return `match`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
index dad4de7cca5..222c5c8a20d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
@@ -1,8 +1,8 @@
 ---
 id: 646d46c03e7d02cecb30f021
-title: الخطوة 88
+title: Step 89
 challengeType: 0
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
@@ -14,25 +14,25 @@ Now you can start applying your function parser to your `evalFormula` logic. Dec
 You should declare a `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
 ```
 
 You should use `const` to declare your `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*const\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*const\s+functionExpanded\s*=\s*/);
 ```
 
 You should assign the `functionExpanded` variable the result of calling your `applyFunction` function.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
 ```
 
 You should pass `cellExpanded` to your `applyFunction` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
index 5b0f6bea3e1..48b1cab80ed 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4717a689e1cfa232e357
-title: الخطوة 89
+title: Step 90
 challengeType: 0
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Use a ternary to check if `functionExpanded` is equal to the original string `x`
 Your `evalFormula` function should use the `return` keyword.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
 ```
 
 Your `return` statement should check if `functionExpanded` is equal to `x`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
 ```
 
 Your `return` statement should use a ternary operator.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
 ```
 
 If the ternary condition is true, your `evalFormula()` should return `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
 ```
 
 If the ternary condition is false, your `evalFormula()` should return the result of calling `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
 ```
 
 You should pass `functionExpanded` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
 ```
 
 You should pass `cells` as the second argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
index d6bb86d7fe6..c1249111d86 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4769ba65f1d05ef6b634
-title: الخطوة 90
+title: Step 91
 challengeType: 0
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
@@ -16,19 +16,19 @@ Inside your `if` statement, set the `value` of the `element` to be the result of
 You should update the `value` property of `element` in your `if` block.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
 ```
 
 You should assign the `value` property the result of calling your `evalFormula()` function.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
 ```
 
 You should not pass any arguments to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
index f73442f91cc..9ef5920b36a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
@@ -1,8 +1,8 @@
 ---
 id: 646d47c8f58107d10f1e5106
-title: الخطوة 91
+title: Step 92
 challengeType: 0
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
@@ -14,19 +14,19 @@ The first argument for your `evalFormula` call needs to be the contents of the c
 You should pass `value` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
 ```
 
 You should call the `.slice()` method on the `value` argument.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(/);
 ```
 
 You should pass the number `1` as the argument to your `.slice()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(\s*1\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
index 999e2121f85..c2b4d2b8c71 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4813c17b37d1e261a566
-title: الخطوة 92
+title: Step 93
 challengeType: 0
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
@@ -14,19 +14,19 @@ You can quickly get all cells from your page by getting the `#container` element
 For the second parameter of your `evalFormula()` call, you should call the `.getElementById()` method of the `document` object.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
 ```
 
 You should pass `container` as the argument to your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
 ```
 
 You should access the `children` property of the result of your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
index b9309fa5b0b..ac6184b9d56 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
@@ -1,8 +1,8 @@
 ---
 id: 646d486aec20f7d2a581cc36
-title: الخطوة 93
+title: Step 94
 challengeType: 0
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
@@ -14,7 +14,7 @@ Unfortunately, that `children` property is returning a collection of elements, w
 You should wrap your `document.getElementById('container').children` in `Array.from()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
index ddbffb0f582..98ffeb00088 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
@@ -1,8 +1,8 @@
 ---
 id: 646d48b936802fd34c3f05af
-title: الخطوة 94
+title: Step 95
 challengeType: 0
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
index 12a75e4253c..a4c682f9df4 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d498c8ebc31d3f753b22e
-title: الخطوة 95
+title: Step 96
 challengeType: 0
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
index 772ddfc53ad..43c6ebe6441 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
@@ -1,8 +1,8 @@
 ---
 id: 646d49bfff9079d4b38df115
-title: الخطوة 96
+title: Step 97
 challengeType: 0
-dashedName: step-96
+dashedName: step-97
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
index 17e5d9d7978..0e9787dff11 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a07a8fb14d55cd70e09
-title: الخطوة 97
+title: Step 98
 challengeType: 0
-dashedName: step-97
+dashedName: step-98
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
index 44c981db380..983d30989b0 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a5b32a1cad6165df286
-title: الخطوة 99
+title: Step 100
 challengeType: 0
-dashedName: step-99
+dashedName: step-100
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
index e3c2f19b22e..34ae3e371aa 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a8dbc04c6d6bb0001f8
-title: الخطوة 100
+title: Step 101
 challengeType: 0
-dashedName: step-100
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
index 32eba980f49..b221e737fdb 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4ab9b3b4c5d74fdd2154
-title: الخطوة 101
+title: Step 102
 challengeType: 0
-dashedName: step-101
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
index b7231e6a95d..89e89d3ac90 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4b3d80ea98d824c8a4f9
-title: الخطوة 102
+title: Step 103
 challengeType: 0
-dashedName: step-102
+dashedName: step-103
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
index f94cc450c9f..eb5424ffa9d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
@@ -1,8 +1,8 @@
 ---
 id: 6491d38f5b09a021c4b5d5fe
-title: الخطوة 98
+title: Step 99
 challengeType: 0
-dashedName: step-98
+dashedName: step-99
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
new file mode 100644
index 00000000000..3a606f8e1cf
--- /dev/null
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
@@ -0,0 +1,104 @@
+---
+id: 65ae458e23954c3469e0c209
+title: Step 18
+challengeType: 0
+dashedName: step-18
+---
+
+
+# --description--
+
+In earlier projects you learned about the `setAttribute` method. Another way to update an attribute in JavaScript is to use the following syntax:
+
+```js
+el.attribute = value;
+```
+
+The property names for hyphenated HTML attribute values, such as `aria-label`, follow camel case, becoming `ariaLabel`.
+
+```js
+el.ariaLabel = "Aria Label Value";
+```
+
+Set the `aria-label` attribute for the `input` element to the same value as the `id` attribute.
+
+
+# --hints--
+
+You should have an `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=/);
+```
+
+
+You should assign `letter + number` to `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=\s*letter\s*\+\s*number/);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="./styles.css" />
+    <title>Functional Programming Spreadsheet</title>
+  </head>
+  <body>
+    <div id="container">
+      <div></div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+#container {
+  display: grid;
+  grid-template-columns: 50px repeat(10, 200px);
+  grid-template-rows: repeat(11, 30px);
+}
+
+.label {
+  background-color: lightgray;
+  text-align: center;
+  vertical-align: middle;
+  line-height: 30px;
+}
+```
+
+```js
+const range = (start, end) => Array(end - start + 1).fill(start).map((element, index) => element + index);
+const charRange = (start, end) => range(start.charCodeAt(0), end.charCodeAt(0)).map(code => String.fromCharCode(code));
+
+window.onload = () => {
+  const container = document.getElementById("container");
+  const createLabel = (name) => {
+    const label = document.createElement("div");
+    label.className = "label";
+    label.textContent = name;
+    container.appendChild(label);
+  }
+  const letters = charRange("A", "J");
+  letters.forEach(createLabel);
+  range(1, 99).forEach(number => {
+     createLabel(number);
+--fcc-editable-region--
+    letters.forEach(letter => {
+     const input = document.createElement("input");
+     input.type = "text";
+     input.id = letter + number;
+
+    })   
+--fcc-editable-region--
+  })
+}
+```
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
index 250b305146b..cc7e470881f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
@@ -16,7 +16,7 @@ Now you should be able to roll the dice a few times and see the values update.
 You should call your `updateStats` function inside the `else` clause.
 
 ```js
-assert.match(code, /updateStats\(\)/)
+assert.match(code, /updateStats\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
index 57952c8ef50..2f05c9374c2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
@@ -28,7 +28,7 @@ assert.match(code, /const\s+updateRadioOption\s*=\s*\(.*\)\s*=>\s*{\s*[\s\S]*};?
 Your `updateRadioOption` function should take `optionNode` and `score` as parameters.
 
 ```js
-assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\)\s*=>\s*{\s*[\s\S]*};?/)
+assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\s*\)\s*=>\s*{\s*[\s\S]*};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
index aa0f61d096b..cb242d86cc2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
@@ -14,7 +14,7 @@ To enable the radio buttons, you should set the `disabled` property on `scoreInp
 You should assign `false` to `scoreInputs[optionNode].disabled`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.disabled\s*=\s*false/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.disabled\s*=\s*false/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
index b36859cf94f..9aa3bd621dd 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
@@ -14,7 +14,7 @@ Next, you will need to update the radio button's `value` to the current `score`.
 You should assign the `score` variable to `scoreInputs[optionNode].value`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.value\s*=\s*score/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.value\s*=\s*score/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
index 9a399298717..40323c9fca6 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
@@ -14,7 +14,7 @@ To display the current score, update the text content for the `span` element nex
 You should set the `textContent` property for `scoreSpans[optionNode]` to the following template literal: `, score = ${score}`.
 
 ```js
-assert.match(code, /scoreSpans\[\s*optionNode\s*\]\.textContent\s*=\s*`, score = \${score}`;?/);
+assert.match(code, /scoreSpans\s*\[\s*optionNode\s*\]\s*\.textContent\s*=\s*`, score = \${score}`;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
index 721111f5717..2eac0d43f00 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
@@ -22,7 +22,7 @@ assert.match(code, /updateRadioOption\(.*\);?/);
 You should have the arguments of `0` and `10` for the `updateRadioOption` function.
 
 ```js
-assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
index 4d60a9b2fce..ddbc05a3b0e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
@@ -14,7 +14,7 @@ Now that you have verified the `updateRadioOption` function works, remove the fu
 You should remove the `updateRadioOption` function call from your `else` clause.
 
 ```js
-assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
index f0b890415d7..f59ca88f7d0 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
@@ -18,19 +18,19 @@ Below your `if` statement, include an `else` clause that assigns `1` to `counts[
 You should have an `if` statement with a condition of `counts[num]`.
 
 ```js
-assert.match(code, /if\s*\(\s*counts\[num\]\s*\)/);
+assert.match(code, /if\s*\(\s*counts\s*\[\s*num\s*\]\s*\)/);
 ```
 
 You should use the `++` operator to increment the value of `counts[num]` by `1` inside your `if` statement.
 
 ```js
-assert.match(code, /counts\[num\]\s*\+\s*=\s*1|counts\[num\]\+\+/);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*\+\s*=\s*1|counts\s*\[\s*num\s*\]\s*\+\+/);
 ```
 
 You should assign `1` to `counts[num]` inside your `else` clause.
 
 ```js
-assert.match(code, /else\s*\{\s*counts\[num\]\s*=\s*1\s*;?\s*\}/);
+assert.match(code, /else\s*\{\s*counts\s*\[\s*num\s*\]\s*=\s*1\s*;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
index 29b830d89ad..bb8fd82d2d2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
@@ -22,7 +22,7 @@ assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s
 You should assign `counts[num]` to your `count` variable.
 
 ```js
-assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\[num\]\s*;?\s*}/);
+assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\s*\[\s*num\s*\]\s*;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
index 69231f3fee2..fcc031e3838 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
@@ -16,7 +16,7 @@ Now, try rolling the dice again and you should see that the previous score `inpu
 You should call the `resetRadioOption` function inside the `rollDiceBtn` callback function.
 
 ```js
-assert.match(code, /resetRadioOption\(\);?/);
+assert.match(code, /resetRadioOption\(\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
index 4dba809148d..9e392b65e74 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
@@ -22,7 +22,7 @@ assert.isFunction(resetGame);
 You should use arrow syntax for your `resetGame` function.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*}\s*;?/);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
index 9b12ecdda93..020d5f2f0e9 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
@@ -24,25 +24,25 @@ assert.match(code, /diceValuesArr\s*=\s*\[\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s
 You should reassign the `score` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `totalScore` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `rolls` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `round` variable to `1`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
index b78b77ce84d..a8703920ba2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
@@ -14,13 +14,13 @@ To reset each of the dice values to show `0`, apply a `forEach` method to the `l
 You should call the `forEach` method of the `listOfAllDice` variable.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
 ```
 
 For your callback function, you should use `dice` and `index` as parameters.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
index 4243a1ad037..46c903ddf8e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
@@ -14,13 +14,13 @@ Inside your callback function, update the `dice` text content by assigning it th
 You should access the `textContent` property of the `dice` parameter.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
 ```
 
 You should assign `diceValuesArr[index]` to `dice.textContent`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
index 2c2f69e4e97..ad5235cf11e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
@@ -20,25 +20,25 @@ Lastly, update the `currentRoundText` text content by assigning it the `round` v
 You should assign `totalScore` to `totalScoreText.textContent`.
 
 ```js
-assert.match(code, /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
+assert.match(resetGame.toString(), /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
 ```
 
 You should use the `innerHTML` property to set the `scoreHistory` to an empty string.
 
 ```js
-assert.match(code, /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
+assert.match(resetGame.toString(), /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
 ```
 
 You should assign `rolls` to `currentRoundRollsText.textContent`.
 
 ```js
-assert.match(code, /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
+assert.match(resetGame.toString(), /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
 ```
 
 You should assign `round` to `currentRoundText.textContent`.
 
 ```js
-assert.match(code, /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
+assert.match(resetGame.toString(), /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
index 271a5b729c7..ba6577cf0a2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
@@ -16,7 +16,7 @@ Assign the entire result of your `ternary` to `counts[num]`.
 You should assign `counts[num] ? counts[num] + 1 : 1` to `counts[num]` in the `for...of` loop.
 
 ```js
-assert.match(code, /counts\[num\]\s*=\s*counts\[num\]\s*\?\s*counts\[num\]\s*\+\s*1\s*:\s*1\s*;?/s);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*=\s*counts\s*\[\s*num\s*\]\s*\?\s*counts\s*\[\s*num\s*\]\s*\+\s*1\s*:\s*1\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
index 6eb34d96ded..bd0423bf79b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasThreeOfAKind\s*=/);
 You should assign `Object.values(counts)` to your `hasThreeOfAKind` variable.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(3)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\)\.includes\(3\)\s*;?/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*3\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
index 1b389206bf2..63c86f4d2f7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasPair\s*=/);
 You should assign `Object.values(counts)` to your `hasPair` variable.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(2)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\)\.includes\(2\)\s*;?/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*2\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
index e1db082dcfb..6701ecce375 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
@@ -36,7 +36,7 @@ assert.match(code, /const\s+sortedNumbersArr\s*=\s*arr\.sort\(.*\);?/);
 Your callback function should use `a` and `b` for the parameters and implicitly return `a - b`.
 
 ```js
-assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(a,\s*b\)\s*=>\s*a\s*-\s*b\s*\));?/);
+assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(\s*a,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\));?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
index 6e17b98418d..0b00a9c9d90 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+smallStraightsArr\s*=?\s*;?/);
 You should store the strings `1234`, `2345` and `3456` in an array and assign it to your `smallStraightsArr`.
 
 ```js
-assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\];?/);
+assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
index 91f1a9bad13..b77c5f1049f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+largeStraightsArr\s*=?\s*;?/);
 You should store the strings `12345` and `23456` in an array and assign it to your `largeStraightsArr`.
 
 ```js
-assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\];?/);
+assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
index 16a50a387ca..580c0976b77 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `smallStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `3` and `30` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
index c12ac08ec1c..3061a3a65b2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `largeStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `4` and `40` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
index 1bedf159a1a..9ab9958afd2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
@@ -16,7 +16,7 @@ Inside the `animate` function, create an `if` statement where the condition chec
 You should have an `if` statement that checks if the right key was pressed and the player's `x` position is less than 400.
 
 ```js
-assert.match(animate.toString(), /keys\.rightKey\.pressed\s*&&\s*player\.position\.x\s*<\s*400/);
+assert.match(animate.toString(), /keys\.rightKey\.(pressed|pressed\s*===\s*true)\s*&&\s*player\.position\.x\s*<\s*400/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
index 1825ab7120a..36d29d58676 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
@@ -30,7 +30,7 @@ assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*
 You should call the `draw` method on each `platform`.
 
 ```js
-assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\)\s*;?\s*}?\s*\);?/);
+assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\s*\)\s*;?\s*}?\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
index 0885dca1fff..94711e66103 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
@@ -26,7 +26,7 @@ Your callback function should have a `platform` parameter.
 
 ```js
 const splitter = code.split("platform.position.x += 5;")
-assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\);?/);
+assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
index f84d598202e..24edbc3c1fc 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
@@ -9,17 +9,17 @@ dashedName: step-78
 
 Inside the callback function, create a new `const` variable called `collisionDetectionRules` and assign it an empty array.
 
-Inside that array, add a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+Inside that array, add a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 # --hints--
 
 You should have a `const` variable called `collisionDetectionRules` that is assigned an empty array.
 
 ```js
-assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\];?/);
+assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\s*\]\s*;?/);
 ```
 
-You should have a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+You should have a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 ```js
 assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*player\.position\.y\s*\+\s*player\.height\s*<=\s*platform\.position\.y\s*,?\s*]\s*;?/);
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
index 33719391524..9bcc28ac670 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
@@ -14,7 +14,7 @@ Inside that array, add a boolean expression that checks if the player's `x` posi
 You should have a boolean expression that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
index b1b3eaf60ac..2ee26e07224 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
@@ -14,7 +14,7 @@ Below that boolean expression, add another boolean expression that checks if the
 You should have a boolean expression that checks if the player's `x` position is less than or equal to the sum of the platform's `x` position and the platform's width minus one third of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
index 779a265f8a9..5775cbd953a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
@@ -16,21 +16,21 @@ Below that, add another boolean expression that checks if the player's `y` posit
 You should not alter the existing `platformDetectionRules` array and its content.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position plus the player's height is greater than or equal to the platform's `y` position.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position is less than or equal to the sum of the platform's `y` position plus the platform's height.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\]\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
index 42f08fc6d79..c9cda1602b2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
@@ -19,21 +19,21 @@ Your `CheckPoint` class should have a `draw` method.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{/);
 ```
 
 Your `draw` method should have a `fillStyle` property.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
 ```
 
 Your `draw` method should have a `fillRect` method.
 
 ```js
 const splitter = code.split('#f1be32')
-assert.match(splitter[1], /ctx\.fillRect\(this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\);?/);
+assert.match(splitter[1], /ctx\.fillRect\(\s*this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
index 6086ea651d3..e4a107291f1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
@@ -25,14 +25,14 @@ assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\([^
 Your callback function should have a `checkpoint` parameter.
 
 ```js
-assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*[^)]*\s*\)\s*;?/);
+assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*[^)]*\s*\)\s*;?/);
 
 ```
 
 You should implicitly return a new `CheckPoint` instance.
 
 ```js
-assert.match(code, /\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
+assert.match(code, /\s*checkpointPositions\.map\s*\(\s*(\(checkpoint\s*\)|checkpoint)\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
index 7a4b7b5a098..949821c46c9 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
@@ -24,13 +24,13 @@ assert.match(code, /\bcheckpoints\b\s*\.\s*forEach\s*\(/s);
 You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*checkpoint\s*=>\s*{/s);
+assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*{?/s);
 ```
 
 You should call the `draw` method on each `checkpoint` inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\.forEach\s*\(\s*checkpoint\s*=>\s*{\s*checkpoint\.draw\(\s*\);?\s*}\s*\);?/s);
+assert.match(code, /\s*checkpoints\.forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*(\{\s*checkpoint\.draw\(\s*\)\s*;?\s*\}|checkpoint\.draw\(\s*\))\s*\)\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
index c2fcdf3fdf1..017ca8163ff 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
@@ -24,7 +24,7 @@ You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
 const splitter = code.split("if (keys.rightKey.pressed && isCheckpointCollisionDetectionActive)")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(?checkpoint\)?\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*\{/);
 ```
 
 You should use the subtraction assignment operator to subtract 5 from the `checkpoint`'s `x` position.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
index 92790f9efc8..b998819e1eb 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
@@ -42,7 +42,7 @@ assert.match(code, /\s*setTimeout\s*\(\s*\(\s*\)\s*=>[^,]*,\s*2000\s*\)/s);
 Your callback function should set the `checkpointScreen` `display` property to `none`.
 
 ```js
-assert.match(code, /\s*if\s*\(isCheckpointCollisionDetectionActive\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
+assert.match(code, /\s*if\s*\(\s*isCheckpointCollisionDetectionActive\s*\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
index 82a951eed8e..264b7c4c5c7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
@@ -24,7 +24,7 @@ Your callback function should have a `checkpoint` parameter and `index`.
 
 ```js
 const splitter = code.split("player.velocity.y = gravity;")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(checkpoint,\s*index\)\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*\(\s*checkpoint,\s*index\s*\)\s*=>\s*\{/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
index a378ad89985..aa4addf8c5c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
@@ -14,7 +14,7 @@ Inside the `if` statement, call the `claim` method on the `checkpoint` object.
 You should call the `claim()` method on the `checkpoint` object.
 
 ```js
-assert.match(code, /checkpoint\.claim\(\);?/)
+assert.match(code, /checkpoint\.claim\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
index 3ed94af031f..15dc88ea0c2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
@@ -24,7 +24,7 @@ assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\
 You should call the `showCheckpointScreen` function and pass in "You reached the final checkpoint!" as an argument.
 
 ```js
-assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\);?/)
+assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(\s*("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\s*\);?/)
 ```
 
 You should call the `movePlayer` function and pass in the provided arguments.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
index d237ab1ef96..56a3560711d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
@@ -18,37 +18,37 @@ Begin by accessing the `task-form`, `confirm-close-dialog`, and `open-task-form-
 You should use `getElementById()` to access the `task-form` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should assign the `task-form` element to the variable `taskForm`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `confirm-close-dialog` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should assign the `confirm-close-dialog` element to the variable `confirmCloseDialog`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `open-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `open-task-form-btn` element to the variable `openTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
index 9aaba6d1f6b..ce54927e369 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
@@ -14,37 +14,37 @@ You need to access more elements with the `getElementById()` method. This time y
 You should use `getElementById()` to access the `close-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `close-task-form-btn` element to the variable `closeTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `add-or-update-task-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should assign the `add-or-update-task-btn` element to the variable `addOrUpdateTaskBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `cancel-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 You should assign the `cancel-btn` element to the variable `cancelBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
index 0faee79084f..483a2cacd6f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
@@ -14,37 +14,37 @@ Next, access the `discard-btn`, `tasks-container`, and `title-input` elements us
 You should use `getElementById()` to access the `discard-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should assign the `discard-btn` element to the variable `discardBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `tasks-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should assign the `tasks-container` element to the variable `tasksContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `title-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 You should assign the `title-input` element to the variable `titleInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
index e1f6344959b..68f22397143 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
@@ -14,25 +14,25 @@ The last set of elements you need to get from the HTML file are the `date-input`
 You should use `getElementById()` to access the `date-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should assign the `date-input` element to the variable `dateInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `description-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 You should assign the `description-input` element to the variable `descriptionInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
index d15eb5a0058..6f71278bb38 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
@@ -13,16 +13,40 @@ Use `let` to create a `currentTask` variable and set it to an empty object. This
 
 # --hints--
 
-You should create a `taskData` constant set to an empty array.
+You should have a `const` variable called `taskData`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=/)
 ```
 
-You should use `let` to create an empty `currentTask` object.
+You should assign an array to your `taskData` constant.
 
 ```js
-assert.match(code, /let\s+currentTask\s*=\s*\{\};?/)
+assert.isArray(taskData);
+```
+
+Your `taskData` array should be empty.
+
+```js
+assert.isEmpty(taskData);
+```
+
+You should use `let` to create a `currentTask` variable.
+
+```js
+assert.match(code, /let\s+currentTask/);
+```
+
+You should assign an object to your `currentTask` variable.
+
+```js
+assert.isObject(currentTask);
+```
+
+Your `currentTask` object should be empty.
+
+```js
+assert.isEmpty(currentTask);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
index 2f133934d41..aa46afa5f64 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
@@ -7,9 +7,15 @@ dashedName: step-7
 
 # --description--
 
-Add a `click` event listener to the `closeTaskFormBtn` variable, then use the `showModal()` method on your `confirmCloseDialog` variable. This will display a modal with the `Discard` and `Cancel` buttons.
+The HTML `dialog` element has a `showModal()` method that can be used to display a modal dialog box on a web page.
 
-`showModal()` is a method associated with the HTML `dialog` element. It is used to display a modal dialog box on a web page.
+```js
+dialogElement.showModal();
+```
+
+Add an event listener to the `closeTaskFormBtn` variable and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `showModal()` method on the `confirmCloseDialog` element. This will display a modal with the `Discard` and `Cancel` buttons.
 
 # --hints--
 
@@ -22,13 +28,13 @@ assert.match(code, /closeTaskFormBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `showModal()` method on `confirmCloseDialog`.
+Your event listener's callback function should call the `showModal()` method on the `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1,\s*\(.*\)\s*=>\s*{?\s*confirmCloseDialog\.showModal\(\);?\s*}?\s*\);?/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1,\s*\(.*\)\s*=>\s*(\{\s*confirmCloseDialog\.showModal\(\s*\)\s*;?\s*\}|confirmCloseDialog\.showModal\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
index 5663fe5901a..a147133319f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
@@ -7,11 +7,15 @@ dashedName: step-8
 
 # --description--
 
-If the user clicks the `Cancel` button, you want to cancel the process (close the modal showing the two buttons) so the user can continue editing.
+If the user clicks the `Cancel` button, you want to cancel the process and close the modal so the user can continue editing. The HTML `dialog` element has a `close()` method that can be used to close a modal dialog box on a web page.
 
-Add a `click` event listener to the `cancelBtn` element, then use the `close()` method on the `confirmCloseDialog` variable.
+```js
+dialogElement.close();
+```
 
-`close()` is a method of the window object you can use to close the current window, or a modal you create with the `dialog` element.
+Add an event listener to the `cancelBtn` element and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `close()` method on the `confirmCloseDialog` element.
 
 # --hints--
 
@@ -24,13 +28,13 @@ assert.match(code, /cancelBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `close()` method on `confirmCloseDialog`. Don't use curly braces.
+Your event listener's callback function should call the `close()` method on `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1\,\s*\(\)\s*\s*=>\s*confirmCloseDialog\.close\(\)\s*\);?/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1\s*\,\s*\(\s*\)\s*=>\s*(\{\s*confirmCloseDialog\.close\(\s*\)\s*;?\s*\}|confirmCloseDialog\.close\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
index e4cc469331c..23348a854b2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
@@ -28,19 +28,19 @@ assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1/)
 You should use arrow syntax to set your event listener to an empty pair of curly braces.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 Your event listener should use the `close()` method on `confirmCloseDialog`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?/)
 ```
 
 Your event listener should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
index b73c052fbe9..41698c74f11 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
@@ -22,19 +22,19 @@ assert.match(code, /taskForm\.addEventListener\(/)
 Your event listener should listen for a `submit` event.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1/)
 ```
 
 You should use arrow syntax to set your event listener to an empty pair of curly braces with `e` as the parameter.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
 ```
 
 You should use the `e.preventDefault()` method to stop the browser from reloading the page.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\);?/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
index 3e9b8bc72e9..cea3d442a5f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
@@ -35,13 +35,13 @@ assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 You should pass in `item` as the parameter of the arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === currentTask.id`.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
index 2b3283df589..c55aa1655f1 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
@@ -30,19 +30,19 @@ assert.match(code, /const\s+taskObj\s*=\s*\{\s*id/)
 You should use template strings to get `titleInput.value` as the value of your `id` key and convert it to lowercase.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)/)
 ```
 
 You should use `.split(' ')` on `titleInput.value.toLowerCase()`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(('|")\s{1}\1\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)/)
 ```
 
 You should use `.join('-')` on `titleInput.value.toLowerCase().split(' ')`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
index b93df01b5cb..de83be46cea 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
@@ -20,13 +20,13 @@ Create an `if` statement with the condition `dataArrIndex === -1`. Within the `i
 You should create an `if` statement with the condition `dataArrIndex === -1`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{/)
 ```
 
 Your `if` statement should have `taskData.unshift(taskObj)` in it's body.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}/)
 ```
 
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
index 5d8410e2dd8..cb8fb56f3d4 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
@@ -26,7 +26,7 @@ assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*(\s*\{?\(\s*ta
 You should use addition assignment to set the `innerHTML` of `tasksContainer` to an empty pair of backticks.
 
 ```js
-assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\)?\s*\}?)/)
+assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\s*\)?\s*\}?)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
index d90df300b05..4a01a00fb0e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
@@ -15,7 +15,7 @@ You should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("taskData.forEach")[1].split("});")
-assert.match(splitter[0], /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(splitter[0], /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
index d03cef2dd52..d08e313b45a 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
@@ -18,13 +18,13 @@ Use arrow syntax to create a `reset` function and set it to a pair of curly brac
 You should use `const` and arrow syntax to create a `reset` function.
 
 ```js
-assert.match(code, /const\s+reset\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+reset\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 Your `reset` function should be empty.
 
 ```js
-assert.match(reset.toString(), /\(\)\s*\{\s*\}/);
+assert.match(reset.toString(), /\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
index 7853d9733b3..5b50cf81031 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
@@ -34,7 +34,7 @@ assert.match(reset.toString(), /descriptionInput\.value\s*=\s*('|")\1;?/)
 You should use `classList` to toggle the class `hidden` on `taskForm`
 
 ```js
-assert.match(reset.toString(), /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(reset.toString(), /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 You should set `currentTask` to an empty object.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
index da29a065074..2833021a82e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the `hidden` class on `taskForm`.
 
 ```js
 const splitter = code.split('<button type="button" class="btn">Delete</button>')
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /reset\(\)/)
+assert.match(code, /reset\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
index feefa817b2d..5b7cf4b52a5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("confirmCloseDialog.close();")
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /confirmCloseDialog\.close\(\);?\s*reset\(\);?/)
+assert.match(code, /confirmCloseDialog\.close\(\s*\);?\s*reset\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
index d1cc8f993bd..65fffda25a8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
@@ -16,7 +16,7 @@ To begin, within the `closeTaskFormBtn` event listener, create a `formInputsCont
 You should use `const` to create a variable `formInputsContainValues` with the value `titleInput.value || dateInput.value || descriptionInput.value;`
 
 ```js
-assert.match(code, /const\s+formInputsContainValues\s*=\s*titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value;?/)
+assert.match(code, /const\s+formInputsContainValues\s*=\s*(titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value|titleInput\.value\s*!==\s*null\s*\|\|\s*dateInput\.value\s*!==\s*null\s*\|\|\s*descriptionInput\.value\s*!==\s*null)\;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
index 2d610237985..cc03d94db6c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
@@ -14,25 +14,25 @@ Create an `if` statement to check if `formInputsContainValues` is true. If `form
 You should create an `if` statement with the condition `formInputsContainValues`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{/)
 ```
 
 The `if` block of your `if` statement should contain `confirmCloseDialog.showModal();`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `reset()` function in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{\s*reset\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{\s*reset\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
index b99267c5b20..f79c68df170 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
@@ -16,7 +16,7 @@ Use arrow syntax to create an `addOrUpdateTask` function. Then move the `dataArr
 You should use `const` and arrow syntax to create an `addOrUpdateTask` function.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should move the `dataArrIndex` variable into the `addOrUpdateTask` function.
@@ -31,7 +31,7 @@ You should move the `taskObj` object into the `addOrUpdateTask` function.
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?/)
 ```
 
-You should move the `if` statement with the condition `dataArrIndex === 1` into your `addOrUpdateTask` function.
+You should move the `if` statement with the condition `dataArrIndex === -1` into your `addOrUpdateTask` function.
 
 ```js
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s*===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?\s*if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\)\s*;?\s*\}\s*\}\s*;?/)
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
index 6824adfb20a..0a9277aab40 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
@@ -14,13 +14,13 @@ Use arrow syntax to create an `updateTaskContainer` function. Then move the `tas
 You should use `const` and arrow syntax to create a `updateTaskContainer` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 You should move `taskData.forEach()` and its content into the `updateTaskContainer()` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\{\s*id,\s*title,\s*date,\s*description\s*\}\)\s*=>\s*{\s*\(tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\)\s*}\s*\);?\s*\};?/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\s*\{\s*id,\s*title,\s*date,\s*description\s*\}\s*\)\s*=>\s*{\s*\(\s*tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\s*\)\s*}\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
index f34072da268..5bb1779faff 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
@@ -14,13 +14,13 @@ Inside the `addOrUpdateTask` function, call the `updateTaskContainer` and `reset
 You should call the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\)\s*/)
+assert.match(code, /updateTaskContainer\(\s*\)\s*/)
 ```
 
 You should call the `reset` function after calling the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\);?\s*reset\(\);?\s*/)
+assert.match(code, /updateTaskContainer\(\s*\);?\s*reset\(\s*\);?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
index 9f07633ef4f..f4142df044e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
@@ -14,7 +14,7 @@ Now remove the `reset()` call inside the `taskForm` submit event listener and ca
 You should remove `reset()` and call `addOrUpdateTask()`.
 
 ```js
-assert.match(code, /addOrUpdateTask\(\)/)
+assert.match(code, /addOrUpdateTask\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
index 79d9e58a51c..a1b1e764537 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
@@ -13,16 +13,16 @@ To enable editing and deleting for each task, add an `onclick` attribute to both
 
 # --hints--
 
-You should add `onclick="editTask(this)"` as the first attribute of the edit button.
+You should add `onclick="editTask(this)"` to your edit button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")editTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3\s*>Edit<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')editTask\(\s*this\s*\)\1)[^>]*>Edit<\/button>/);
 ```
 
-You should add `onclick="deleteTask(this)"` as the first attribute of the delete button.
+You should add `onclick="deleteTask(this)"` to your delete button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")deleteTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3>Delete<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')deleteTask\(\s*this\s*\)\1)[^>]*>Delete<\/button>/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
index 3944b17918f..bdb14e06c1c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable and set its value using the `findIndex()` metho
 You should not alter the `deleteTask` function.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
index 3d234666348..b5449ce095f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
@@ -30,7 +30,7 @@ Use the `remove()` method to remove the `parentElement` of the `buttonEl` from t
 You should use the `remove()` method to remove the parent element of `buttonEl`.
 
 ```js
-assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\);?/)
+assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\s*\);?/)
 ```
 
 You should use `splice()` on the `taskData` array.
@@ -42,13 +42,13 @@ assert.match(deleteTask.toString(), /taskData\.splice\(/)
 The first argument of your `splice()` method should be `dataArrIndex`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex/)
 ```
 
 The second argument of your `splice()` method should be `1`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex,\s*1\);?/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex,\s*1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
index 944271cfc1a..3d39026910e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable. For its value, utilize the `findIndex()` metho
 You should not alter the `editTask` function.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
index 0d016f112a7..4272b98031b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
@@ -14,7 +14,7 @@ Use square bracket notation to retrieve the task to be edited from the `taskData
 You should assign `taskData[dataArrIndex]` to `currentTask`.
 
 ```js
-assert.match(code, /currentTask\s*=\s*taskData\[dataArrIndex\];?/)
+assert.match(code, /currentTask\s*=\s*taskData\s*\[\s*dataArrIndex\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
index 98a545d8f10..a0721e465fd 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
@@ -14,13 +14,13 @@ At this point, editing a task won't reflect when you submit the task. To make th
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 Your `else` block should have the code `taskData[dataArrIndex] = taskObj`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*taskData\[dataArrIndex\]\s*=\s*taskObj;?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*taskData\s*\[\s*dataArrIndex\s*\]\s*=\s*taskObj;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
index d255dbbc94d..5ee681508fb 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
@@ -26,13 +26,13 @@ After that, open your browser console and go to the `Applications` tab, select `
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 Your `localStorage.setItem()` should have a value of `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*myTaskArr\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*myTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
index 630c5a09fce..d1def1e55bc 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
@@ -16,13 +16,13 @@ To resolve the issue, wrap the data you're saving in the `JSON.stringify()` meth
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 You should wrap `JSON.stringify()` around `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*JSON\.stringify\(myTaskArr\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*JSON\.stringify\(\s*myTaskArr\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
index 3bcb7b0c725..6286f27ba6e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
@@ -16,13 +16,13 @@ Use the `getItem()` method to retrieve the `myTaskArr` array and assign it to th
 You should use `const` to create a `getTaskArr` variable and assign `localStorage.getItem("data")` to it.
 
 ```js
-assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(('|")data\1\);?/)
+assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\1\s*\);?/)
 ```
 
 You should log the `getTaskArr` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArr\);?/)
+assert.match(code, /console\.log\(\s*getTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
index b06e8544878..0b2020b5e33 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
@@ -18,13 +18,13 @@ Check the console to see the difference between `getTaskArr` and `getTaskObj`.
 You should use `const` to create a `getTaskArrObj` variable and assign it to `JSON.parse(localStorage.getItem('data'));`.
 
 ```js
-assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\);?/)
+assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\);?/)
 ```
 
 You should log the `getTaskArrObj` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArrObj\);?/)
+assert.match(code, /console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
index 6437cc608f4..5b4f12b94ad 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
@@ -16,7 +16,7 @@ Remove the `data` item from local storage and open the console to observe the re
 You should use `localStorage.removeItem()` to remove the `data` item from the browser's local storage.
 
 ```js
-assert.match(code, /localStorage\.removeItem\(('|")data\1\);?/)
+assert.match(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
index f53812eeae2..1e15251a924 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
@@ -16,13 +16,13 @@ Remove `localStorage.removeItem()` and use `localStorage.clear()` instead. You d
 You should remove `localStorage.removeItem("data")`.
 
 ```js
-assert.notMatch(code, /localStorage\.removeItem\(('|")data\1\);/)
+assert.notMatch(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);/)
 ```
 
 You should remove everything from the browser `local storage` with `localStorage.clear()`.
 
 ```js
-assert.match(code, /localStorage\.clear\(\);?/)
+assert.match(code, /localStorage\.clear\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
index ddbec940b53..3dbe23a6aea 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
@@ -14,7 +14,7 @@ Remove the `myTaskArr` array and all of the code for `localStorage` because you
 You should remove `myTaskArr` and all the code related to `localStorage` that you've just learned.
 
 ```js
-assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s"Walk\s*the\s*Dog",\s*date:\s*"22-04-2022"\s*\},\s*\{\s*task:\s"Read\s*some\s*books",\s*date:\s*"02-11-2023"\s*\},\s*\{\s*task:\s"Watch\s*football",\s*date:\s*"10-08-2021"\s*\},\s*\];?\s*localStorage\.setItem\("data", JSON\.stringify\(myTaskArr\)\);\s*localStorage\.clear\(\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\("data"\)\s*console\.log\(getTaskArr\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\("data"\)\);?\s*console\.log\(getTaskArrObj\);?/)
+assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s('|")Walk\s*the\s*Dog\1,\s*date:\s*('|")22-04-2022\2\s*\},\s*\{\s*task:\s('|")Read\s*some\s*books\3,\s*date:\s*('|")02-11-2023\4\s*\},\s*\{\s*task:\s('|")Watch\s*football\5,\s*date:\s*('|")10-08-2021\6\s*\},\s*\]\s*;?\s*localStorage\.setItem\(('|")data\7, JSON\.stringify\(\s*myTaskArr\s*\)\s*\);\s*localStorage\.clear\(\s*\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\8\s*\)\s*console\.log\(\s*getTaskArr\s*\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\9\s*\)\s*\);?\s*console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
@@ -316,7 +316,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -346,7 +346,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
index ba0cf9274af..84014f38ace 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
@@ -24,13 +24,13 @@ assert.match(code, /localStorage\.setItem\(/)
 You should pass in `"data"` as the first argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
index 24999fea489..6c8d26123a8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
@@ -24,14 +24,14 @@ You should pass in `"data"` as the first argument of your `localStorage.setItem(
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
index 2e0da6f58d0..72fdc6640da 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
@@ -16,7 +16,7 @@ Set `taskData` to the retrieval of `data` from local storage **or** an empty arr
 You should set the `taskData` variable to `JSON.parse(localStorage.getItem("data")) || [];`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\)\s*\|\|\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\)\s*\|\|\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -321,7 +321,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -352,7 +352,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
index bd1425d47b5..e6e4bd28060 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
@@ -20,13 +20,13 @@ With that, you've completed this project.
 You should create an `if` statement with `(taskData.length)` as the condition. As a reminder, `0` is a falsy value.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*/)
 ```
 
 You should call the `updateTaskContainer` function in your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*updateTaskContainer\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*updateTaskContainer\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
index 33601229adb..8c8d3411232 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
@@ -20,7 +20,7 @@ console.log(Date.now()); // 1628586800000
 You should attach `-${Date.now()}` to the existing value of the `id` key. Don't forget it needs to be inside the template string.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
index d2ad381c4ba..f21fcdc5ab2 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
@@ -1,32 +1,18 @@
 ---
 id: 63e02a333354343b595d64ca
-title: الخطوة 16
+title: Step 15
 challengeType: 0
-dashedName: step-16
+dashedName: step-15
 ---
 
 # --description--
 
-Now that you have tested the `Object.freeze()` method, you can delete those two lines of code from the last lesson.
-
 The next step is to access the key called `sport` from the `myFavoriteFootballTeam` object and assign it to a new `const` variable called `sport`.
 
 Remember you can use dot notation for this.
 
 # --hints--
 
-You should remove your assignment of the `USA` string to `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /myFavoriteFootballTeam\.team\s*=\s*('|"|`)USA\1\s*/);
-```
-
-You should remove your `console.log` for `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /console\.log\(\s*myFavoriteFootballTeam\.team\s*\)/);
-```
-
 You should use `const` to declare a `sport` variable.
 
 ```js
@@ -462,8 +448,6 @@ Object.freeze(myFavoriteFootballTeam);
 
 --fcc-editable-region--
 
-myFavoriteFootballTeam.team = "USA";
-console.log(myFavoriteFootballTeam.team);
 
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
index 0f2878e0b4b..d9520c64e56 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
@@ -1,8 +1,8 @@
 ---
 id: 63e0334b7a24bd3c96aca4de
-title: الخطوة 17
+title: Step 16
 challengeType: 0
-dashedName: step-17
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
index 1f4ea22f1a4..e556c5c05e3 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e036373fc9173d284e165a
-title: الخطوة 18
+title: Step 17
 challengeType: 0
-dashedName: step-18
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
index 1fe98b00cec..2a8ea3b0d0b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
@@ -1,8 +1,8 @@
 ---
 id: 63e03b86008bbb3e1c3de846
-title: الخطوة 19
+title: Step 18
 challengeType: 0
-dashedName: step-19
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
index 7e408806c36..32ae955337d 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
@@ -1,8 +1,8 @@
 ---
 id: 63e042661ad2663f0d468740
-title: الخطوة 20
+title: Step 19
 challengeType: 0
-dashedName: step-20
+dashedName: step-19
 ---
 
 # --description--
@@ -15,7 +15,7 @@ Use object destructuring to access the `coachName` value.
 
 ```js
 
-assert.match(code, /const\s*{\s*coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach\s*/)
+assert.match(code, /const\s*{\s*(coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach|headCoach\s*:\s*{\s*coachName\s*}\s*}\s*=\s*myFavoriteFootballTeam)\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
index e930451bdab..ed536a4b70e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
@@ -1,8 +1,8 @@
 ---
 id: 63e050bf935ac341b88326d6
-title: الخطوة 21
+title: Step 20
 challengeType: 0
-dashedName: step-21
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
index ccbc429ab80..3562608e3f9 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05557016dfd45ea49152c
-title: الخطوة 22
+title: Step 21
 challengeType: 0
-dashedName: step-22
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
index f825667a20a..70772e4cba9 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05c00b615bb46ac87273a
-title: الخطوة 23
+title: Step 22
 challengeType: 0
-dashedName: step-23
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
index 6f871a2e483..862d6c0fd77 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
@@ -1,8 +1,8 @@
 ---
 id: 63e060df21bca347b2d2b374
-title: الخطوة 24
+title: Step 23
 challengeType: 0
-dashedName: step-24
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
index c482728efa6..5ea194d88aa 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e062d6090ebb486a4eda3a
-title: الخطوة 25
+title: Step 24
 challengeType: 0
-dashedName: step-25
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
index 1b93b90400c..5cd7ea1d6e4 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
@@ -1,8 +1,8 @@
 ---
 id: 63e949b8327aa2aca2ca8eac
-title: الخطوة 26
+title: Step 25
 challengeType: 0
-dashedName: step-26
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
index 9d036fbdd8a..b13000896fc 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
@@ -1,8 +1,8 @@
 ---
 id: 63e94dae6dcedbad73f2f6ee
-title: الخطوة 27
+title: Step 26
 challengeType: 0
-dashedName: step-27
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
index b16bd6bda19..dbeb80c7a4c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
@@ -1,8 +1,8 @@
 ---
 id: 63e954321b0a77ae4f6d9650
-title: الخطوة 28
+title: Step 27
 challengeType: 0
-dashedName: step-28
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
index b2d5b6d53bb..3912e0e6228 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95a45dce95baf41dd4f78
-title: الخطوة 29
+title: Step 28
 challengeType: 0
-dashedName: step-29
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
index 286dc0e6d27..9a21ae45f28 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95e39860dc5b01ebe9be0
-title: الخطوة 30
+title: Step 29
 challengeType: 0
-dashedName: step-30
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
index 523ab39abfa..e037852b3bc 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9667c881b61b1e338d276
-title: الخطوة 31
+title: Step 30
 challengeType: 0
-dashedName: step-31
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
index 99a8841f006..20e68b6415e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96938d2a347b2734a1587
-title: الخطوة 32
+title: Step 31
 challengeType: 0
-dashedName: step-32
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
index 790e3d09fd0..eb225b3116c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96eb94c97b6b31ee50f63
-title: الخطوة 33
+title: Step 32
 challengeType: 0
-dashedName: step-33
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
index bc513a33de2..401f8fcb289 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9718d7d490bb3940d5a0a
-title: الخطوة 34
+title: Step 33
 challengeType: 0
-dashedName: step-34
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
index 21c7bd4a318..e2cf0d8bbea 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9737f686c76b4078a60f4
-title: الخطوة 35
+title: Step 34
 challengeType: 0
-dashedName: step-35
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
index b427090bf8e..0544b4bdd11 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28972973504e7bb58b0b3
-title: الخطوة 36
+title: Step 35
 challengeType: 0
-dashedName: step-36
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
index a187c417495..91426574c6f 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28ef082d771e8bf71f94a
-title: الخطوة 37
+title: Step 36
 challengeType: 0
-dashedName: step-37
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
index 9ef37b9fa9c..9ad6aab3caa 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
@@ -1,8 +1,8 @@
 ---
 id: 63f293c804d6f9e9a83ca4c5
-title: الخطوة 38
+title: Step 37
 challengeType: 0
-dashedName: step-38
+dashedName: step-37
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Open the console, and make a selection from the teammates dropdown menu. You sho
 You should add a `console.log` with the value of `e.target.value`.
 
 ```js
-assert.match(code, /console\.log\s*\(e\.target\.value\)\s*/)
+assert.match(code, /console\.log\s*\(\s*e\.target\.value\s*\)\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
index 5b9cffaf4f2..f95cf6e5d4b 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29804e3ec00ea6fab1ec4
-title: الخطوة 39
+title: Step 38
 challengeType: 0
-dashedName: step-39
+dashedName: step-38
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Inside the callback function, access the `innerHTML` property of the `playerCard
 You should not have the `console.log` statement in your code.
 
 ```js
-assert.notMatch(code, /\s*console\.log\(e\.target\.value\)/);
+assert.notMatch(code, /\s*console\.log\(\s*e\.target\.value\s*\)/);
 ```
 
 You should access the `innerHTML` property of the `playerCards` element.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
index 8b8ad516a6a..134d1331364 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29ce62aea65eb041758c8
-title: الخطوة 40
+title: Step 39
 challengeType: 0
-dashedName: step-40
+dashedName: step-39
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /switch\s*\(\s*e\.target\.value\s*\)/);
 Your `switch` statement should be empty.
 
 ```js
-assert.match(code, /\s*switch\s*\(e\.target\.value\)\s*{\s*}/);
+assert.match(code, /\s*switch\s*\(\s*e\.target\.value\s*\)\s*{\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
index 6a00c0562e9..a3caf074b5c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a0a860790eebe61bf908
-title: الخطوة 41
+title: Step 40
 challengeType: 0
-dashedName: step-41
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
index 139eafd613f..303dace84dc 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a4a8087e6dec8ec47f16
-title: الخطوة 44
+title: Step 43
 challengeType: 0
-dashedName: step-44
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
index 887ea44700e..b66de0298ec 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a5f09a785aed155c0a56
-title: الخطوة 45
+title: Step 44
 challengeType: 0
-dashedName: step-45
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
index 398863a0a7e..f6cb13c7bc5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a8e14fb388edd3242527
-title: الخطوة 46
+title: Step 45
 challengeType: 0
-dashedName: step-46
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
index 17d5fa4d6f9..3ff1f2396c8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2aa36fcdc63ee4e18fc37
-title: الخطوة 47
+title: Step 46
 challengeType: 0
-dashedName: step-47
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
index 57172632b3f..0543e8d3b98 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2ab4f6c52c5eec6d68de4
-title: الخطوة 48
+title: Step 47
 challengeType: 0
-dashedName: step-48
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
index 1dca6e2a675..6cd48c0e9a8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
@@ -1,8 +1,8 @@
 ---
 id: 641fc88d8fa7127f76e0324f
-title: الخطوة 42
+title: Step 41
 challengeType: 0
-dashedName: step-42
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
index 6e1fe40cc0e..11c8298ac82 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
@@ -1,8 +1,8 @@
 ---
 id: 641fcfd468185384ac218b7d
-title: الخطوة 43
+title: Step 42
 challengeType: 0
-dashedName: step-43
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
index 014434eadc1..5a0e7668a3c 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-After alerting the user if the number input is empty of the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
+After alerting the user if the number input is empty or the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
 
 Add the `return` keyword after `alert()`.
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
index 6491f7d93d5..e251066d292 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
@@ -24,7 +24,6 @@ Use the `.reverse()` method to reverse the order of the `remainders` array, and
 You should use the `.reverse()` method on the `remainders` array.
 
 ```js
-console.log(String(decimalToBinary))
 assert.match(String(decimalToBinary), /remainders\.reverse\(\s*\)/);
 ```
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
index 088d0111292..3dc58a01511 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
@@ -31,7 +31,7 @@ assert.notMatch(String(decimalToBinary), /else\s+if\s*\([\s\S]+\)/);
 Your `decimalToBinary()` function should have an `if` statement that checks if `input` is equal to `0` or `1`.
 
 ```js
-assert.match(String(decimalToBinary), /if\s*\(input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
+assert.match(String(decimalToBinary), /if\s*\(\s*input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(\s*input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
 ```
 
 If input is equal to `0` or `1`, your `decimalToBinary()` function should return `String(input)`.
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
index b74a41dd2f8..94c4a6078be 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
@@ -44,7 +44,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1000` as the second argument to the `setTimeout` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
index 2c1187ae6b4..5dbc7838b63 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
@@ -48,7 +48,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
index 728931ddac6..165a0963655 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
@@ -46,7 +46,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
index f3a8d3b7208..9b88596e977 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the `id` attribute to the `inputVal`
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
index 0a1828da122..ce9808feaa6 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the text of the paragraph element to
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
index 867bb8bc873..8b1c9958afc 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `showMsgDelay` property of the c
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)showMsgDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)showMsgDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
index edd29543d97..15d5d6a6609 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
@@ -18,7 +18,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
index d303813f693..7ac0f279386 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
@@ -27,7 +27,7 @@ You should set the `textContent` property of the targeted element equal to the `
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\[\s*('|"|`)\s*msg\s*\1\s*\]/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\s*\[\s*('|"|`)\s*msg\s*\1\s*\]/
 );
 ```
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
index 56ff5696cf8..56af61e5e14 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `removeElDelay` property of the
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)removeElDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)removeElDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
index 7db9d495186..e79db048309 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
@@ -16,7 +16,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.lengthOf(
   String(showAnimation).match(
-    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
+    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
   ),
   2
 );
@@ -27,7 +27,7 @@ You should chain the `.remove()` method to the `.getElementById()` method.
 ```js
 assert.match(
   String(showAnimation),
-  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
+  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
 );
 ```
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
index 3577f226fe1..0322d91fd24 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
@@ -18,7 +18,7 @@ You should set the `textContent` property of `result` equal to calling `decimalT
 ```js
 assert.match(
   String(showAnimation),
-  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\[('|"|`)textContent\1\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
+  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\s*\[\s*('|"|`)textContent\1\s*\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
 );
 ```
 
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
index beb05c9e75b..b9f29d47e65 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
@@ -9,9 +9,9 @@ dashedName: step-5
 
 Back in your event listener, you need to update the text of the `result` element.
 
-Use a ternary operator to update the text of the `result` element after the `if` statement. Check the truthiness of calling `isSpam()` on the value of the `messageInput` element. If true, set the text to `Oh no! This looks like a spam message.`. Otherwise, set the text to `This message does not seem to contain any spam.`
+After the `if` statement, use a ternary operator to check the truthiness of calling `isSpam()` with `messageInput.value` as the argument. If true, set the `textContent` property on the `result` element to `Oh no! This looks like a spam message.`. Otherwise, set it to `This message does not seem to contain any spam.`
 
-Then set the `messageInput` element's value to an empty string.
+Then set the `messageInput` element's `value` property to an empty string.
 
 # --hints--
 
@@ -21,10 +21,10 @@ You should use the assignment operator to set the `textContent` property of the
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*/)
 ```
 
-You should assign the `isSpam()` function call to `result.textContent`.
+You should call the `isSpam()` function after the assignment operator `=` and before the `?` ternary operator.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(.*\)\s*\?/)
 ```
 
 You should use ternary syntax to check the truthiness of `isSpam(messageInput.value)`.
@@ -45,10 +45,10 @@ The falsy expression of your ternary should set the `textContent` property of th
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*/);
 ```
 
-After your ternary, set the `value` of `messageInput` to an empty string.
+After your ternary, set the `value` property on the `messageInput` element to an empty string.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5\s*;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
index 8d93af2ed7d..2ecfdb5ec26 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
@@ -24,13 +24,13 @@ assert.match(code, /const\s+currentDateParagraph\s+=/);
 You should use `document.getElementById()` to get the `#current-date` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)current-date\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)current-date\1\s*\)/);
 ```
 
 You should assign the `#current-date` element to your `currentDateParagraph` variable.
 
 ```js
-assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(('|"|`)current-date\1\)/g));
+assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(\s*('|"|`)current-date\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
index 6f4bd5b1549..3251dfbe9da 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+dateOptionsSelectElement\s+=/);
 You should use `document.getElementById()` to get the `#date-options` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)date-options\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)date-options\1\s*\)/);
 ```
 
 You should assign the `#date-options` element to your `dateOptionsSelectElement` variable.
 
 ```js
-assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(('|"|`)date-options\1\)/g));
+assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(\s*('|"|`)date-options\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
index 1d492c89475..7bcb692313e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
@@ -32,7 +32,7 @@ assert.match(code, /const\s+date\s+=/);
 You should assign a `Date` object to your `date` variable with `new Date()`.
 
 ```js
-assert(code.match(/const\s+date\s+=\s+new\s+Date\(\)/g));
+assert(code.match(/const\s+date\s+=\s+new\s+Date\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
index 34044d5854d..5057c8f7a94 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
@@ -30,7 +30,7 @@ assert.match(code, /const\s+day\s+=/);
 You should assign the `date.getDate()` to your `day` variable.
 
 ```js
-assert(code.match(/const\s+day\s+=\s+date\.getDate\(\)/g));
+assert(code.match(/const\s+day\s+=\s+date\.getDate\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
index 7af6954eaa2..eff37a7e4ae 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+month\s+=/);
 You should assign the `date.getMonth() + 1` to your `month` variable.
 
 ```js
-assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\)\s*\+\s*1/g));
+assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\s*\)\s*\+\s*1/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
index 7506abbb7a0..1094e2337b5 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+year\s+=/);
 You should assign the `date.getFullYear()` to your `year` variable.
 
 ```js
-assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\)/g));
+assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
index 15f42e90d4e..eae4719c8f4 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+hours\s+=/);
 You should assign the `date.getHours()` to your `hours` variable.
 
 ```js
-assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\)/g));
+assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
index 2eb59ce315b..f0e6dec69c0 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+minutes\s+=/);
 You should assign the `date.getMinutes()` to your `minutes` variable.
 
 ```js
-assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\)/g));
+assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
index 1f0469d8b28..a696a6e22b7 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
@@ -16,7 +16,7 @@ Open up the console and you should see the date printed out.
 You should have a `console.log(formattedDate)` line in your code.
 
 ```js
-assert.match(code, /console\.log\(formattedDate\)/);
+assert.match(code, /console\.log\(\s*formattedDate\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
index d193948d6ec..694546c3ade 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
@@ -22,7 +22,7 @@ assert(code.match(/currentDateParagraph\.textContent\s*=\s*formattedDate/g));
 You should not have a `console.log(formattedDate);` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(formattedDate\);/);
+assert.notMatch(code, /console\.log\(\s*formattedDate\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
index 6f2512d154e..b7501220d7e 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
@@ -15,11 +15,17 @@ element.addEventListener("change", () => {
 });
 ```
 
-Chain the `addEventListener` method to `dateOptionsSelectElement` where the first argument is `change` and the second argument is an empty arrow function.
+Attach the `addEventListener` method to the `dateOptionsSelectElement`. The first argument of the event listener should be the string `change` and the second argument should be an empty arrow function.
 
 # --hints--
 
-You should use the `addEventListener` method to add a `change` event listener to `dateOptionsSelectElement`.
+You should attach the `addEventListener` method to the `dateOptionsSelectElement`.
+
+```js
+assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(/g));
+```
+
+Your event listener should listen for a `change` event.
 
 ```js
 assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(\s*('|")change\1/g));
diff --git a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
index 27cdef02fb5..59e933e39b8 100644
--- a/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
+++ b/curriculum/challenges/arabic/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
@@ -22,7 +22,7 @@ Chain the `.reverse()` method to the end of `.split()` method.
 You should use the `.reverse()` method to reverse the order of the array returned by `.split()`.
 
 ```js
-assert(code.match(/\.reverse\(\)/g));
+assert(code.match(/\.reverse\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/arabic/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md b/curriculum/challenges/arabic/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
index a721563d96d..1f1a60542e3 100644
--- a/curriculum/challenges/arabic/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
+++ b/curriculum/challenges/arabic/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
@@ -109,7 +109,6 @@ assert(getCorrectStyle()?.textAlign === 'center');
 # --seed--
 
 ## --seed-contents--
-
 ```css
 ```
 
diff --git a/curriculum/challenges/arabic/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md b/curriculum/challenges/arabic/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
index 6480354b9f3..cf7e94d0967 100644
--- a/curriculum/challenges/arabic/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
+++ b/curriculum/challenges/arabic/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
@@ -29,4 +29,4 @@ They are outdated technologies.
 
 ## --video-solution--
 
-1
+2
diff --git a/curriculum/challenges/arabic/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md b/curriculum/challenges/arabic/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
index fa5b427fdc5..857d52d4c51 100644
--- a/curriculum/challenges/arabic/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
+++ b/curriculum/challenges/arabic/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
@@ -1,5 +1,5 @@
 ---
-id: 657e0d0037192f3d9e3d5417 
+id: 657e0d0037192f3d9e3d5417
 title: Task 128
 challengeType: 22
 dashedName: task-128
diff --git a/curriculum/challenges/arabic/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md b/curriculum/challenges/arabic/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
index f8949309ce8..8b4e002d454 100644
--- a/curriculum/challenges/arabic/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
+++ b/curriculum/challenges/arabic/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
@@ -13,7 +13,7 @@ Bob: Alright, team. This is Alice's first day with _ , so please let _ introduce
 -->
 # --description--
 
-You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sould more natural. Listen for the object pronouns Bob uses in this audio.
+You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sound more natural. Listen for the object pronouns Bob uses in this audio.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/arabic/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md b/curriculum/challenges/arabic/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
index 46b65350213..1a295854b79 100644
--- a/curriculum/challenges/arabic/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
+++ b/curriculum/challenges/arabic/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
@@ -26,8 +26,8 @@ The algorithm follows:
   <li>Seed the RNG with the number of the deal.
   </li><li>Create an array of 52 cards: Ace of Clubs, Ace of Diamonds, Ace of Hearts, Ace of Spades, 2 of Clubs, 2 of Diamonds, and so on through the ranks: Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King. The array indexes are 0 to 51, with Ace of Clubs at 0, and King of Spades at 51.</li>
   <li>Until the array is empty:</li>
-  <li>Choose a random card at index ≡ next random number (mod array length).</li>
     <ul>
+      <li>Choose a random card at <i>index</i> ≡ <i>next random number</i> (mod <i>array length</i>).</li>
       <li>Swap this random card with the last card of the array.</li>
       <li>Remove this random card from the array. (Array length goes down by 1.)</li>
       <li>Deal this random card.</li>
diff --git a/curriculum/challenges/arabic/22-rosetta-code/rosetta-code-challenges/execute-brain.md b/curriculum/challenges/arabic/22-rosetta-code/rosetta-code-challenges/execute-brain.md
index 48d59d8daf9..62a7d597284 100644
--- a/curriculum/challenges/arabic/22-rosetta-code/rosetta-code-challenges/execute-brain.md
+++ b/curriculum/challenges/arabic/22-rosetta-code/rosetta-code-challenges/execute-brain.md
@@ -16,16 +16,16 @@ Below are links to each of the versions of RCBF.
 
 An implementation need only properly implement the following instructions:
 
-| Command                   | Description                                                                                 |
-| ------------------------- | ------------------------------------------------------------------------------------------- |
-| <code>></code> | Move the pointer to the right                                                               |
-| <code>&lt;</code> | Move the pointer to the left                                                                |
-| <code>+</code> | Increment the memory cell under the pointer                                                 |
-| <code>-</code> | Decrement the memory cell under the pointer                                                 |
-| <code>.</code> | Output the character signified by the cell at the pointer                                   |
-| <code>,</code> | Input a character and store it in the cell at the pointer                                   |
-| <code>\[</code> | Jump past the matching <code>]</code> if the cell under the pointer is 0           |
-| <code>]</code> | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
+| Command           | Description                                                                        |
+| ----------------- | ---------------------------------------------------------------------------------- |
+| <code>></code>    | Move the pointer to the right                                                      |
+| <code>&lt;</code> | Move the pointer to the left                                                       |
+| <code>+</code>    | Increment the memory cell under the pointer                                        |
+| <code>-</code>    | Decrement the memory cell under the pointer                                        |
+| <code>.</code>    | Output the character signified by the cell at the pointer                          |
+| <code>,</code>    | Input a character and store it in the cell at the pointer                          |
+| <code>\[</code>   | Jump past the matching <code>]</code> if the cell under the pointer is 0           |
+| <code>]</code>    | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
 
 Any cell size is allowed, EOF (*E*nd-*O*-*F*ile) support is optional, as is whether you have bounded or unbounded memory.
 
diff --git a/curriculum/challenges/chinese-traditional/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md b/curriculum/challenges/chinese-traditional/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
index cf6adc8b57b..add017035eb 100644
--- a/curriculum/challenges/chinese-traditional/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
+++ b/curriculum/challenges/chinese-traditional/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
@@ -22,7 +22,8 @@ dashedName: record-collection
 -   你的函數必須始終返回整個 `records` 對象。
 -   如果 `value` 是空字符串，從專輯裏刪除指定的 `prop`。
 -   如果 `prop` 不是 `tracks`，並且 `value` 不是一個空字符串，將 `value` 賦給那個專輯的 `prop`。
--   如果 `prop` 是 `tracks` 並且 `value` 不是一個空字符串，你需要更新專輯的 `tracks` 數組。 首先，如果專輯沒有 `tracks` 屬性，賦予它一個空數組。 然後添加 `value` 作爲專輯的 `tracks` 數組的最後一個項目。
+-   If `prop` is `tracks` and `value` isn't an empty string, but the album doesn't have a `tracks` property, create an empty array and add `value` to it.
+-   If prop is `tracks` and `value` isn't an empty string, add `value` to the end of the album's existing `tracks` array.
 
 **注意：** 將 `recordCollection` 對象的副本用於測試。 你不應該直接修改 `recordCollection` 對象。
 
diff --git a/curriculum/challenges/chinese-traditional/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md b/curriculum/challenges/chinese-traditional/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
index ed584abf237..cca4dfbec46 100644
--- a/curriculum/challenges/chinese-traditional/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
+++ b/curriculum/challenges/chinese-traditional/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
@@ -8,7 +8,7 @@ dashedName: serialization-of-a-user-object
 
 # --description--
 
-序列化和反序列化在身份認證中是很重要的概念。 序列化一個對象就是將其內容轉換成一個體積很小的 *key*，後續可以通過它反序列化爲原始對象。 這樣，服務器就可以在用戶未登錄時識別用戶，或者說給這個用戶一個唯一標識，用戶也不需要在每次訪問不同頁面時都給服務器發送用戶名和密碼。
+Serialization and deserialization are important concepts in regard to authentication. 序列化一個對象就是將其內容轉換成一個體積很小的 *key*，後續可以通過它反序列化爲原始對象。 這樣，服務器就可以在用戶未登錄時識別用戶，或者說給這個用戶一個唯一標識，用戶也不需要在每次訪問不同頁面時都給服務器發送用戶名和密碼。
 
 要正確設置此功能，你需要一個序列化的函數和一個反序列化函數。 在 Passport 中間件中，可以使用以下方法創建它們：
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
index eb19c1f5086..d6d0aee0ecc 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
@@ -19,8 +19,8 @@ You should use the `append()` method to append `start` to `paths[start]`.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\.append\s*\(\s*start\s*\)/m));
+    const {function_body} = shortest;
+    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\s*\.append\s*\(\s*start\s*\)/m));
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
index 24437d5190a..ca316093bcb 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
@@ -27,8 +27,8 @@ You should call `extend()` on the neighbour node path passing the current node p
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
index 62c85955de3..6be42c7d3d6 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
@@ -16,8 +16,8 @@ You should append `node` to `paths[node]` just after your `else` statement.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\.append\s*\(\s*node\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\s*\.append\s*\(\s*node\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
index 064e059f31f..64a2288eccf 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
@@ -28,7 +28,7 @@ You should print the provided string inside your new `for` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
+    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(\s*f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
index ae65115f367..b5fb8a095d5 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
@@ -32,7 +32,7 @@ You should create a variable called `targets_to_print` after your `while` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=/ms));
   }
 })
 ```
@@ -43,7 +43,7 @@ You should the ternary syntax to assign `[target]` when `target` is truthy, and
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
index 91277ce3972..414f9cbb516 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
@@ -25,7 +25,7 @@ Just before your `print()` call, use the `del` keyword to delete the `age` key a
 You should use the `del` keyword to delete `copper['age']` before the `print()` call.
 
 ```js
-({ test: () => assert.match(code, /^del\s+copper\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
+({ test: () => assert.match(code, /^del\s+copper\s*\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
index e425c7639a2..151d625d2fd 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
@@ -24,7 +24,7 @@ Create an `__init__` method inside your `Board` class.
 Your method should be named `__init__`. Don't add any parameters.
 
 ```js
-assert.match(code, / +def\s+__init__\s*\(\)\:/);
+assert.match(code, / +def\s+__init__\s*\(\s*\)\:/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
index 414845f086f..caec607aa3f 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
@@ -43,7 +43,6 @@ class Board:
 --fcc-editable-region--
         for index, line in enumerate(self.board):
           row_list = []
-          
+
 --fcc-editable-region--
 ```
-
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
index de3b6824bac..fecd9cc37eb 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
@@ -16,7 +16,7 @@ Use list slicing to create the three lists of equal length representing the `lin
 You should have `enumerate([line[:3], line[3:6], line[6:]], start=1)` within the inner `for` loop.
 
 ```js
-assert.match(code, /\[line\[:3\],\s*line\[3:6\],\s*line\[6:\]\]\s*,\s*start\s*=\s*1/);
+assert.match(code, /\[\s*line\s*\[\s*:3\s*\]\s*,\s*line\s*\[\s*3\s*:\s*6\s*\]\s*,\s*line\s*\[\s*6\s*:\s*\]\s*\]\s*,\s*start\s*=\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
index 6a9e89f7f2c..7294ee215dd 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
@@ -14,13 +14,13 @@ In the `try` block, attempt to find the index of the first occurrence of `0` in
 Use the index of the first occurrence of `0` in the current row using `contents.index(0)`.
 
 ```js
-assert.match(code, /contents\.index\(0\)/)
+assert.match(code, /contents\.index\(\s*0\s*\)/)
 ```
 
 You should have `col = contents.index(0)` within the `try` block.
 
 ```js
-assert.match(code, /col\s*=\s*contents\.index\(0\)/)
+assert.match(code, /col\s*=\s*contents\.index\(\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
index 07446b567ad..1ab0b03b177 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
@@ -16,7 +16,7 @@ You should check if the number(`num`) is not present in `self.board[row]`.
 You should have `num not in self.board[row]` within `valid_in_row`.
 
 ```js
-assert.match(code, /num\s+not\s+in\s+self\.board\[row\]/)
+assert.match(code, /num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
index 46e610434ea..e6300341579 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
@@ -21,7 +21,7 @@ You should have `return num not in self.board[row]` within `valid_in_row`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_row");
 const {function_body} = valid;
-assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\[row\]/);
+assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
index a0a8634beef..af81814550a 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] != num` within `valid_in_col`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /self\.board\[row\]\[col\]\s*!=\s*num/);
+assert.match(function_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
index 1d843866cc3..e91adc09639 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
@@ -28,7 +28,7 @@ You should have `all(self.board[row][col] != num for row in range(9))` within `v
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /all\s*\(\s*self\.board\[row\]\[col\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
+assert.match(function_body, /all\s*\(\s*self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
index a8176351f82..05505324060 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
@@ -21,7 +21,7 @@ You should assign the result of `(row // 3) * 3` to `row_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /row_start\s*=\s*\(row\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /row_start\s*=\s*\(\s*row\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
index feb473b686c..6690896b66c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
@@ -21,7 +21,7 @@ You should assign the result of `(col // 3) * 3` to `col_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /col_start\s*=\s*\(col\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /col_start\s*=\s*\(\s*col\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
index 304b0115e58..72e7b3f8cf0 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
@@ -22,7 +22,7 @@ You should have `next_empty := self.find_empty_cell()` within the `solver` metho
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\)/);
+assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
index aa774295c29..a5d78904da6 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
@@ -16,7 +16,7 @@ You should have `if (next_empty := self.find_empty_cell()) is None:` withing `so
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /if\s*\(next_empty\s*:=\s*self\.find_empty_cell\(\)\)\s*is\s*None:/)
+assert.match(function_body, /if\s*\(\s*next_empty\s*:=\s*self\.find_empty_cell\(\s*\)\s*\)\s*is\s*None:/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
index 45b15a39ce3..32260b31f5f 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
@@ -7,7 +7,7 @@ dashedName: step-64
 
 # --description--
 
-If still there are empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive).
+If there are still empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive). Your loop should use the variable named `guess`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have `for guess in range(1,10):` within the `else` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "else");
-assert.match(block_body, /for\s+\w+\s+in\s+range\(1,\s*10\)/);
+assert.match(block_body, /for\s+\w+\s+in\s+range\(\s*1,\s*10\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
index f349c1598d2..d2839eb7b9a 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] = guess` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*guess/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*guess/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
index 959d3c3561f..b852270379e 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
@@ -17,7 +17,7 @@ You should have `self.solver()` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.solver\(\)/);
+assert.match(block_body, /self\.solver\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
index 90cfbab212c..b433105bdb3 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
@@ -19,7 +19,7 @@ You should have `if self.solver():` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /if\s+self\.solver\(\):/);
+assert.match(block_body, /if\s+self\.solver\(\s*\):/);
 ```
 
 You should have `return True` within `if self.solver():`.
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
index 2ad783b7828..4ba503b62f8 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
@@ -19,7 +19,7 @@ You should have `self.board[row][col] = 0` outside the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*0/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*0/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
index 6ea0aa8091f..791c1850306 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
@@ -18,7 +18,7 @@ You should have `gameboard = Board(board)` within the `solve_sudoku` function.
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solve_sudoku");
-assert.match(function_body, /gameboard\s*=\s*Board\(board\)/);
+assert.match(function_body, /gameboard\s*=\s*Board\(\s*board\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
index 738558d6f6e..ec4ed0c061e 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
@@ -22,7 +22,7 @@ With this, you are finished with building the sudoku solver!
 Call the `solve_sudoku` method with `puzzle` as input.
 
 ```js
-assert.match(code, /solve_sudoku\(puzzle\)/);
+assert.match(code, /solve_sudoku\(\s*puzzle\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
index 0bd5b665c49..0a134540d37 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
@@ -37,7 +37,7 @@ You should assign `array[:middle_point]` to the `left_part` variable.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /left_part\s*=\s*array\[:middle_point\]/);
+    assert.match(function_body, /left_part\s*=\s*array\s*\[\s*:\s*middle_point\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
index ec5d6de9866..7be63f2aaab 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
@@ -22,7 +22,7 @@ You should replace `pass` keyword with an `if` statement with this condition: `l
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*pass/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
index 7d282787716..47ad7922b5f 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
@@ -24,7 +24,7 @@ You should replace `pass` with `array[sorted_index] = left_part[left_array_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*array\[sorted_index\]\s*=\s*left_part\[left_array_index\]\s*(?!.*\bpass\b)/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]\s*(?!.*\bpass\b)/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
index ddfc3eef8cf..2917f8adb6e 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
@@ -24,7 +24,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /else:\s*[^}]*array\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /else:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
index 57efee50128..5a15ffb0ee5 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
@@ -24,7 +24,7 @@ Your `while` loop should have this condition: `left_array_index < len(left_part)
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(left_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):/m);
   }
 })
 ```
@@ -38,7 +38,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
index 282d55667ca..3d7b0fed0bc 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = left_part[left_array_index]` in the body
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ You should not have `pass` in the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
index b3d71f0bfa7..321c6e3cc8c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `left_array_i
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
index 35e8f16340f..56002f16775 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
@@ -22,7 +22,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
index 2f959734d8e..faaad8cf38a 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
@@ -22,7 +22,7 @@ Your `while` loop should have this condition: `right_array_index < len(right_par
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(right_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):/m);
   }
 })
 ```
@@ -36,7 +36,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
index 6cd01f1d648..078ab1ffdf1 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
index 61657ec3711..6d1b2a7de51 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
@@ -20,7 +20,7 @@ You should have `right_array_index += 1` within the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bright_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bright_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
index 7be01e9af6f..fdf55ff2779 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
index ffe2f0d98b7..0db77a88a47 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
@@ -24,7 +24,7 @@ You should create an `if` statement to check if `len(array) <= 1`. Don't forget
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*pass/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
index 645b8108a32..474b2e21b08 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
@@ -20,7 +20,7 @@ You should replace `pass` with a `return` statement in the body of the `if` stat
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*return/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the body of the `if` statement
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
index 9c60d01f7d5..e78d477f26c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
@@ -21,8 +21,8 @@ You should add `1` to the current value of `left_array_index`.
     const { function_body } = merge_sort;
 
     const allowedMatches = [
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
     ]
 
     const anyMatch = allowedMatches.some((match) => match.test(function_body));
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
index 0ffda4e2c22..293cdac44f4 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
@@ -34,7 +34,7 @@ You should assign `array[middle_point:]` to the `right_part` variable
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /right_part\s*=\s*array\[middle_point:\]/);
+    assert.match(function_body, /right_part\s*=\s*array\s*\[\s*middle_point\s*:\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
index 91fbc27f995..90284d51303 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
@@ -7,11 +7,11 @@ dashedName: step-2
 
 # --description--
 
-Replace the `pass` statement with a variable named `card_number` and a value of `4111-1111-4555-1142`.
+Replace the `pass` statement with a variable named `card_number` and a value of `'4111-1111-4555-1142'`.
 
 # --hints--
 
-You should have `card_number = "4111-1111-4555-1142"` within the `main` function.
+You should have `card_number = '4111-1111-4555-1142'` within the `main` function.
 
 ```js
 ({
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
index 013f0ef6fc5..7618695707e 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
@@ -13,7 +13,7 @@ The Luhn algorithm is as follows:
 
 1. From the right to left, double the value of every second digit; if the product is greater than 9, sum the digits of the products.
 2. Take the sum of all the digits.
-3. If the sum of all the digits is a multiple of `10`, then the number is valid; else it is not valid.
+3. If the sum of all the digits is a multiple of 10, then the number is valid; else it is not valid.
 
 Assume an example of an account number "7992739871" that will have a check digit added, making it of the form 7992739871x:
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
index 66797a5ca3b..db3f1fdacca 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
@@ -30,7 +30,7 @@ You should have `card_number_reversed = card_number[0:4]` within the `verify_car
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
index fd6d0c7e43f..08c76d5b389 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
@@ -20,7 +20,7 @@ You should have `odd_digits = card_number_reversed[::2]` within the `verify_card
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\[::2\]/);
+        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\s*\[\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
index 29b0b2cefe3..b7910d0fd11 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
@@ -27,7 +27,7 @@ You should have `sum_of_odd_digits += int(digit)` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(digit\)/);
+        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(\s*digit\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
index eba8c1e8818..2e398916208 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
@@ -20,7 +20,7 @@ You should have `even_digits = card_number_reversed[1::2]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\[1::2\]/);
+        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\s*\[\s*1\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
index 9947b24707c..2c2834be9c4 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
@@ -22,7 +22,7 @@ You should have `number = int(digit) * 2` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /number\s*=\s*int\(digit\)\s*\*\s*2/);
+        assert.match(function_body, /number\s*=\s*int\(\s*digit\s*\)\s*\*\s*2/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
index 6c1bb5b6559..c13e176c4f1 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
@@ -30,8 +30,8 @@ You should have `number = number // 10 + number % 10` within the `if` statement.
         const verify_card_number = __helpers.python.getBlock("\n" + transformedCode, "if number >= 10");
         const { block_body } = verify_card_number;
         const allowedMatches = [
-            /number *= *\(?number *\/\/ *10\)? *\+ *\(?number *% *10/,
-            /number *= *\(?number *% *10\)? *\+ *\(?number *\/\/ *10/
+            /number *= *\(?\s*number *\/\/ *10\s*\)? *\+ *\(?\s*number *% *10/,
+            /number *= *\(?\s*number *% *10\s*\)? *\+ *\(?\s*number *\/\/ *10/
         ];
 
         const someMatch = allowedMatches.some(allowedMatch => allowedMatch.test(block_body));
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
index b2226769ec9..3a017638d9c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
@@ -7,7 +7,7 @@ dashedName: step-33
 
 # --description--
 
-Adjust the `verify_card_number` call such that if it returns `True`, print `VALID!` to the console. Otherwise, print `INVALID!`.
+Adjust the `verify_card_number` call such that if it returns `True`, print `'VALID!'` to the console. Otherwise, print `'INVALID!'`.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `if verify_card_number(translated_card_number):` within the `mai
 })
 ```
 
-You should have `print("VALID!")` within the `if` statement.
+You should have `print('VALID!')` within the `if` statement.
 
 ```js
 ({
@@ -40,7 +40,7 @@ You should have `print("VALID!")` within the `if` statement.
 })
 ```
 
-You should have `print("INVALID!")` within the `else` clause.
+You should have `print('INVALID!')` within the `else` clause.
 
 ```js
 ({
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
index 08748f89bde..f72ad424768 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
@@ -7,7 +7,7 @@ dashedName: step-34
 
 # --description--
 
-Change the value of `card_number` such that `INVALID!` is printed to the console.
+Change the value of `card_number` such that `'INVALID!'` is printed to the console.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
index ce80d09bd4a..11715399f10 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
@@ -20,7 +20,7 @@ You should have `card_number_reversed = card_number[0:4:2]` within the `verify_c
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4:2\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
index 95a972ef4c8..a0d03b31c48 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
@@ -27,7 +27,7 @@ You should have `card_number_reversed = card_number[::-1]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[::-1\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*:\s*:\s*-1\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
index 8a86659f690..4d07406623c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
@@ -10,10 +10,10 @@ dashedName: step-4
 A dictionary is another built-in data type in Python. A dictionary is a collection of data in the form of *key*-*value* pairs. Dictionaries are defined with curly braces `{}` and they contain key-value pairs separated by commas. Each key is followed by a colon `:` and the value:
 
 ```py
-{"amount": 50.0, "category": "Food"}
+{'amount': 50.0, 'category': 'Food'}
 ```
 
-In the example above, `amount` and `category` are keys, and `50.0` and `Food` are their the corresponding values.
+In the example above, `amount` and `category` are keys, and `50.0` and `'Food'` are their the corresponding values.
 
 Create a dictionary with a key `amount` and value of the `amount` parameter and pass your new dictionary to the `.append()` call.
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
index 0359464a1f3..0517bd16e81 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `category` as the key, and the `category` parameter as the value.
+Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `'category'` as the key, and the `category` parameter as the value.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
index d2bcf1b548a..140fcebf27c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
@@ -10,11 +10,11 @@ dashedName: step-9
 You can access values in a dictionary through its keys. You need to use the bracket notation and include the key between the square brackets:
 
 ```py
-my_dict = {"amount": 50.0, "category": "Food"}
-my_dict["amount"] # 50.0
+my_dict = {'amount': 50.0, 'category': 'Food'}
+my_dict['amount'] # 50.0
 ```
 
-You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `amount` key and the `category` key in the `expense` dictionary.
+You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `'amount'` key and the `'category'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
index e21256b9778..317085535c2 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
@@ -13,7 +13,7 @@ Lambda functions are brief, anonymous functions in Python, ideal for simple, one
 lambda x: expr
 ```
 
-In the example above, `x` is a parameter to be use in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
+In the example above, `x` is a parameter to be used in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
index f7b5666e017..772a39c40ca 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `amount` key in the `expense` dictionary.
+Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `'amount'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
index aaaff781c55..2da741a5e09 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `category` key of the `expense` dictionary and `category`.
+Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `'category'` key of the `expense` dictionary and `category`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
index 96e8cf168be..3c65bd36b5d 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
@@ -23,7 +23,7 @@ You should define a function named `main()` without parameters.
 })
 ```
 
-You should move the `expense` list inside the `main()` function body.
+You should move the `expenses` list inside the `main()` function body.
 
 ```js
 ({ test: () => assert(__pyodide.runPython(`
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
index 47853bdc344..af9b2587e39 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
@@ -14,7 +14,7 @@ while condition:
     <code>
 ```
 
-Below the `expense` list, create a `while` loop. Use `True` for the condition, and print the string `\nExpense Tracker` inside the loop body to show the title of the program.
+Below the `expenses` list, create a `while` loop. Use `True` for the condition, and print the string `'\nExpense Tracker'` inside the loop body to show the title of the program.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
index 1c2f1ef52cc..d91c0d622f3 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
@@ -9,7 +9,7 @@ dashedName: step-25
 
 The `while` loop you created in the previous step is an infinite loop that will allow the program to continuously present menu options until the user decides to exit.
 
-After the `print()` call, add another one to print the string `1. Add an expense`.
+After the `print()` call, add another one to print the string `'1. Add an expense'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
index 71345de4b95..3b933dadaee 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
@@ -7,7 +7,7 @@ dashedName: step-26
 
 # --description--
 
-Next, add another `print()` call and pass the string `2. List all expenses`.
+Next, add another `print()` call and pass the string `'2. List all expenses'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
index c65773cc565..15881486448 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
@@ -7,7 +7,7 @@ dashedName: step-27
 
 # --description--
 
-Provide the other menu options by printing the following three strings in your `while` loop: `3. Show total expenses`, `4. Filter expenses by category`, and `5. Exit`.
+Provide the other menu options by printing the following three strings in your `while` loop: `'3. Show total expenses'`, `'4. Filter expenses by category'`, and `'5. Exit'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
index 5e01173eba4..b217338b920 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
@@ -9,7 +9,7 @@ dashedName: step-28
 
 The `input()` function takes a user input and it returns the user input in the form of a string.
 
-Inside your `while` loop, call the `input()` function passing the string `Enter your choice:` as the argument, and assign the result to a variable named `choice`.
+Inside your `while` loop, call the `input()` function passing the string `'Enter your choice: '` as the argument, and assign the result to a variable named `choice`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
index a6b48965efb..1a7335b39a0 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
@@ -7,9 +7,9 @@ dashedName: step-29
 
 # --description--
 
-You are going to use conditional statements to check the user's choice. If the choice is `1`, it means the user wants to add an expense.
+You are going to use conditional statements to check the user's choice. If the choice is `'1'`, it means the user wants to add an expense.
 
-Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `1`. If it's true, it will be the starting point for adding a new expense.
+Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `'1'`. If it's true, it will be the starting point for adding a new expense.
 
 Inside the `if` statement body, declare a variable `amount` and assign it an empty `input()` call.
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
index 77199ddfee9..7d0977e488b 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
@@ -9,7 +9,7 @@ dashedName: step-30
 
 Inside the `if` statement, you should ask the user to enter the amount for the expense and store it in a variable.
 
-Pass the string `Enter amount:` to your empty `input()` call, so you can store the expense.
+Pass the string `'Enter amount: '` to your empty `input()` call, so you can store the expense.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
index b87180d8ac1..c1d42d6c071 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
@@ -9,7 +9,7 @@ dashedName: step-34
 
 To list all expenses, you can use an `elif` statement after an `if` statement. The `elif` checks additional conditions and only works following an `if` statement.
 
-Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `\nAll Expenses:`.
+Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `'\nAll Expenses:'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
index 94d62be0431..946e683dcd4 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
@@ -9,7 +9,7 @@ dashedName: step-36
 
 To show the total expenses, create an `elif` statement that checks if `choice == '3'`.
 
-If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `\nTotal Expenses:` as the first argument and `total_expenses(expenses)` as the second argument.
+If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `'\nTotal Expenses: '` as the first argument and `total_expenses(expenses)` as the second argument.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
index 69d9fb1dabb..ce0e58e43e3 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
@@ -7,9 +7,9 @@ dashedName: step-41
 
 # --description--
 
-To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `5`.
+To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `'5'`.
 
-Inside the new `elif` statement, print the string `Exiting the program.` to show that the program is terminating its execution.
+Inside the new `elif` statement, print the string `'Exiting the program.'` to show that the program is terminating its execution.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `elif choice == '5':` in your code.
 })
 ```
 
-You should print `Exiting the program.` in your new `elif` statement.
+You should print `'Exiting the program.'` in your new `elif` statement.
 
 ```js
 ({ test: () =>
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
index 8140585476c..2290572b660 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
@@ -22,7 +22,7 @@ You should replace `pass` with an empty list named `snake_cased_char_list` withi
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\]/);
+        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\s*\]\s*/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
index 795c3c35a2f..52d2b2f4a78 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
@@ -34,7 +34,7 @@ You should use the `.append()` method to add `char` to the `snake_cased_char_lis
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list.append\(char\)/);
+        assert.match(function_body, / +snake_cased_char_list.append\(\s*char\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
index 6ba08fd2a4d..d3ccc5dd34b 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
@@ -7,11 +7,11 @@ dashedName: step-12
 
 # --description--
 
-Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `aLongAndComplexString` as input to the function and print out the output using the `print()` function.
+Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `'aLongAndComplexString'` as input to the function and print out the output using the `print()` function.
 
 # --hints--
 
-You should call `convert_to_snake_case()` inside the `main()` function and pass `aLongAndComplexString` as input to the function.
+You should call `convert_to_snake_case()` inside the `main()` function and pass `'aLongAndComplexString'` as input to the function.
 
 ```js
 ({
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
index 8b958ee2b0c..c4d099e5157 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
@@ -7,7 +7,7 @@ dashedName: step-22
 
 # --description--
 
-Finally try out this new implementation by executing the program. Change the input string to `IAmAPascalCasedString` and see if it comes out as `i_am_a_pascal_cased_string`, even though that's a lie.
+Finally try out this new implementation by executing the program. Change the input string to `'IAmAPascalCasedString'` and see if it comes out as `'i_am_a_pascal_cased_string'`, even though that's a lie.
 
 If you've done everything correctly, you should see the input string converted into snake case, like before.
 
@@ -15,7 +15,7 @@ Congratulations! Now your `convert_to_snake_case()` function is ready.
 
 # --hints--
 
-You should change the input string from `aLongAndComplexString` to `IAmAPascalCasedString` inside the `main()` function.
+You should change the input string from `'aLongAndComplexString'` to `'IAmAPascalCasedString'` inside the `main()` function.
 
 ```js
 ({
@@ -24,7 +24,7 @@ You should change the input string from `aLongAndComplexString` to `IAmAPascalCa
         const main = __helpers.python.getDef("\n" + transformedCode, "main");
         const { function_body } = main;
 
-        assert.match(function_body, / +print\(convert_to_snake_case\('IAmAPascalCasedString'\)\)/);
+        assert.match(function_body, / +print\(\s*convert_to_snake_case\(\s*'IAmAPascalCasedString'\s*\)\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
index 832efc2338c..683572cdc3d 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
@@ -7,9 +7,9 @@ dashedName: step-3
 
 # --description--
 
-The puzzle starts with the disks piled up on the first rod, in decreasing size. You need to populate your first list with numbers representing the various disk sizes.
+The puzzle starts with the disks piled up on the first rod, in decreasing size, with the smallest disk on top and the largest disk on the bottom. You need to populate your first list with numbers representing the various disk sizes.
 
-Instead of adding the items manually to the first list, generate a sequence of numbers from `3` to `1` by using the `range()` function and assign it to `rods['A']`.
+Instead of adding the items manually to the first list, generate a sequence of numbers counting down from `3` to `1` by using the `range()` function and assign it to `rods['A']`. Here, `3` represents the largest disk at the bottom of the pile and `1` represents the smallest disk at the top of the pile.
 
 The syntax is `range(x, y, h)`, where `x` is the starting integer (inclusive), `y` is the last integer (not inclusive), and `h` is the difference between a number and the next one in the sequence.
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
index 4949177f5fa..1719f4059ac 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
@@ -14,13 +14,13 @@ Now check the data type of your `'A'` key by passing it to the `type()` function
 You should pass your `'A'` key to the `type()` function.
 
 ```js
-({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)/) })
+({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)/) })
 ```
 
 You should print the type of `rods['A']` using the `print()` function.
 
 ```js
-({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)\s*\)/) })
+({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
index 8cd103b3cf9..881f177c23c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
@@ -14,7 +14,7 @@ Now that the type is `list` as required, you can remove the `print()` call.
 You should remove `print(type(rods['A']))` from your code.
 
 ```js
-({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
+({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
index 909943c6301..040c922a88b 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
@@ -9,7 +9,7 @@ dashedName: step-16
 
 At the end of this project, you will create a recursive solution to the Tower of Hanoi puzzle, but now you are going to explore an iterative approach to this problem.
 
-Start by adding a `for` loop to your function that iterates through the number of moves and prints the current iteration number.
+Start by adding a `for` loop to your function that iterates through the `number_of_moves` and prints the current iteration number.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
index e0b6f77d3b5..872392b6c0e 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `A` and `B` (the source and the auxiliary rods).
+When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `'A'` and `'B'` (the source and the auxiliary rods).
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
index bad1a38a1b1..90cb2546456 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
@@ -7,7 +7,7 @@ dashedName: step-21
 
 # --description--
 
-Finally, when the move number divided by 3 has no remainder, the movement is allowed between `B` and `C`.
+Finally, when the move number divided by 3 has no remainder, the movement is allowed between `'B'` and `'C'`.
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
index ff2d5ca96d5..cd60a4ab240 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
@@ -18,10 +18,10 @@ You should have an `elif` statement to check if `rods[source]` is not empty and
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:`);
 assert.match(code, re);
 ```
 
@@ -30,10 +30,10 @@ You should set `forward` to `True` inside your new `elif` statement. You should
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
 assert.match(code, re);
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
index 71b96f65d8b..c9cdb7a37b6 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
@@ -20,7 +20,7 @@ You should add an `if` statement to execute when `forward` is `True` after the `
 You should print the provide string inside your new `if` statement.
 
 ```js
-({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
+({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
index a71a224356d..6b7ef347660 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
@@ -14,13 +14,13 @@ After printing the move, you need to remove the last element from the source rod
 You should remove the last element from `rods[source]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[target].append(rods[source].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
index ab097a8c317..e946a460057 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
@@ -14,25 +14,25 @@ When `forward` is `False`, the disk has to be moved in the opposite direction. W
 You should have an `else` clause to move the disks in the opposite direction.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
 ```
 
 You should have `print(f'Moving disk {rods[target][-1]} from {target} to {source}')` inside your `else` clause.
 
 ```js
-({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
+({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
 ```
 
 You should remove the last element from `rods[target]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[source].append(rods[target].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
index 28889cbb8d4..f8d40e21c64 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
@@ -14,13 +14,13 @@ Outside the `else` block, add a comment saying `display our progress` and print
 You should use the provided text to add a comment outside the `else` block.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
 ```
 
 You should print the `rods` object outside the `else` block, after the comment.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
index 47b38aa099d..02054801bda 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
@@ -15,7 +15,7 @@ You should move the code nested inside the first `if` statement (except the firs
 
 ```js
 ({ test: () => {
-  assert.match(code, /def\s+make_allowed_move\(rod1, rod2\):\s+forward\s+=\s+False\s+if\s+not\s+rods\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\[\s*source\s*\]\s+and\s+rods\[\s*source\s*\]\[-1\]\s<\srods\[\s*target\s*\]\[\s*-\s*1\s*\]:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\[\s*source\s*\].append\(\s*rods\[\s*target\s*\].pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+\print\(\s*rods\s*\)/);
+  assert.match(code, /def\s+make_allowed_move\(\s*rod1, rod2\s*\):\s+forward\s+=\s+False\s+if\s+not\s+rods\s*\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\s*\[\s*source\s*\]\s+and\s+rods\s*\[\s*source\s*\]\s*\[\s*-1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\s*\[\s*source\s*\]\s*\.append\(\s*rods\s*\[\s*target\s*\]\s*\.pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\(\s*rods\s*\)/);
   }
 })
 ```
@@ -47,7 +47,7 @@ def move(n, source, auxiliary, target):
             if not rods[target]:
                 forward = True
             elif rods[source] and rods[source][-1] < rods[target][-1]:
-                forward = True              
+                forward = True
             if forward:
                 print(f'Moving disk {rods[source][-1]} from {source} to {target}')
                 rods[target].append(rods[source].pop())
@@ -57,7 +57,7 @@ def move(n, source, auxiliary, target):
 
             # display our progress
             print(rods)
---fcc-editable-region--            
+--fcc-editable-region--
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
         elif remainder == 0:
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
index d06a8001eb6..5a6abd5d9af 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
@@ -15,11 +15,11 @@ You should change each occurrence of `source` inside the `make_allowed_move()` f
 
 ```js
 ({ test: () => {
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
index 6e9dcdf99b4..3b511652353 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
@@ -16,11 +16,11 @@ You should change each occurrence of `target` inside `make_allowed_move` into `r
 ```js
 ({ test: () => {
   assert.match(code, /if\s+not\s+rods\s*\[\s*rod2\s*\]\s*:/);
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\[\s*rod2\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*rod2\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\s*\[\s*rod2\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod2\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
index aca426b237f..92d9f0f8e8c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
@@ -11,7 +11,7 @@ It looks like it's working! But the output is not very readable. Print a new lin
 
 # --hints--
 
-You should pass a string with a new line character (`\n`) as the second argument for your two `print(rods)` calls.
+You should pass a string with a new line character (`'\n'`) as the second argument for your two `print(rods)` calls.
 
 ```js
 ({ test: () => assert.match(code, /print\(\s*rods\s*,\s*('|")\\n\1\s*\)(?=.*print\(\s*rods\s*,\s*('|")\\n\2\s*\))/s) })
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
index 655dfe6ed91..6bc961fdaa8 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
@@ -16,7 +16,7 @@ For now, each recursive call prints the `rods` dictionary without performing any
 You should remove the last element from the `rods[source]` list and append it to the `rods[target]` list before the `print` call.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
index 675c27c4d80..f390689b218 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
@@ -14,7 +14,7 @@ Before appending the last element to the target, add a comment saying `move the
 You should add a comment with the provided text before `rods[target].append(rods[source].pop())`.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\))/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
index b694c5292dc..338a51ccbf4 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Although recursion could sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
+Although recursion can sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
 
 Set `NUMBER_OF_DISKS` to `5` and check the output.
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
index 0f11f736be3..0f1b550b747 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
@@ -21,7 +21,7 @@ You should delete the last three lines in your code.
 ({ test: () => {
   assert.isFalse(/pattern\s*=\s*r("|')\\W\1/.test(code));
   assert.isFalse(/quote\s*=\s*("|')_\1/.test(code));
-  assert.isFalse(/print\(re\.findall\(pattern, quote\)\)/.test(code));
+  assert.isFalse(/print\(\s*re\.findall\(\s*pattern, quote\s*\)\s*\)/.test(code));
 }})
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
index afbaf300e7b..0038d4fba01 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
@@ -14,7 +14,7 @@ Now, turn the empty string in the constraint tuple into a regex pattern to match
 You should have the `(nums, '[0123456789]')` tuple in your `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
+({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
index df98f1a99a2..466b3b2dbf4 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
@@ -27,7 +27,7 @@ You should replace your existing `for` loop and two `if` statements with a singl
 Your new `if` condition should be a list comprehension that is the result of evaluating the expression `constraint <= len(re.findall(pattern, password))` for each `constraint`-`pattern` tuple in the `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /^(\s{8})if\s+\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
+({ test: () => assert.match(code, /^(\s{8})if\s*\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
index 5a7a8e606dd..7b38a1bc24a 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
@@ -1,6 +1,6 @@
 ---
 id: 6551ecf597038c36637f3759
-title: Step 1
+title: 步驟 1
 challengeType: 20
 dashedName: step-1
 ---
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
index 2e6d119b78b..37b551daa50 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
@@ -1,6 +1,6 @@
 ---
 id: 6551eebe6cbb2e6cadf9b468
-title: Step 2
+title: 步驟 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -15,7 +15,7 @@ string_2 = 'I am also a string'
 string_3 = 'This is not valid"
 ```
 
-Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `Hello World` to this variable.
+Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `'Hello World'` to this variable.
 
 # --hints--
 
@@ -32,7 +32,7 @@ You should declare a variable called `text`. Pay attention to place the variable
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello World` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
+You should assign the string `'Hello World'` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello World\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
index d40877ed6af..2b65b4b4212 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
@@ -14,7 +14,7 @@ greet = 'Hello!'
 print(greet)
 ```
 
-The code in the example above would print the string `Hello!`, which is the value of the variable `greet` passed to `print()` as the argument.
+The code in the example above would print the string `'Hello!'`, which is the value of the variable `greet` passed to `print()` as the argument.
 
 Print your `text` variable to the screen by passing the `text` variable as the argument to the `print()` function.
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
index 86104aff4f6..7c28d74b6b7 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `Hello World`, `H` is at index `0`, `e` is at index `1`, and so on. 
+Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `'Hello World'`, `'H'` is at index `0`, `'e'` is at index `1`, and so on.
 
 Each character of a string can be accessed by using bracket notation. You need to write the variable name followed by square brackets and add the index of the character between the brackets:
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
index 5d0ae1dd2fa..3103cb653bf 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-You can see `11` printed on the terminal because `Hello World` contains 11 characters.
+You can see `11` printed on the terminal because `'Hello World'` contains 11 characters.
 
 Another useful built-in function is `type()`, which returns the data type of a variable. Modify your `print()` call to print the data type of `text`.
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
index cedb112a823..074c15b2e19 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
@@ -14,7 +14,7 @@ Key aspects of variable naming in Python are:
 - Variable names are case sensitive, i.e. `my_var` is different from `my_Var` and `MY_VAR`.
 - Finally, it is a common convention to write variable names using `snake_case`, where each space is replaced by an underscore character and the words are written in lowercase letters.
 
-Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `abcdefghijklmnopqrstuvwxyz` to this variable.
+Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `'abcdefghijklmnopqrstuvwxyz'` to this variable.
 
 # --hints--
 
@@ -38,7 +38,7 @@ You should declare a variable called `alphabet`. Pay attention to place the vari
 assert.match(code, /^alphabet\s*=/m)
 ```
 
-You should assign the string `abcdefghijklmnopqrstuvwxyz` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
+You should assign the string `'abcdefghijklmnopqrstuvwxyz'` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
 
 ```js
 assert.match(code, /^alphabet\s*=\s*("|')abcdefghijklmnopqrstuvwxyz\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
index abe8ced263d..5c272b6d6f1 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
@@ -15,7 +15,7 @@ Start by finding the position of the first letter in the string. One way is to c
 text.find('W')
 ```
 
-Above, uppercase `W` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `W` character inside the string stored in the `text` variable.
+Above, uppercase `'W'` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `'W'` character inside the string stored in the `text` variable.
 
 At the end of your code, call `.find()` on your `alphabet` string and pass `text[0]` to the method. Note that a method is just a function that belongs to an object (you will learn more about that in another project).
 
@@ -36,7 +36,7 @@ assert.match(code, /alphabet\.find\s*\(.*\)/)
 You should call the `.find()` method on the `alphabet` variable and pass `text[0]` to the method. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)/m)
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 412619ccc4c..3e3af82109c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -22,7 +22,7 @@ assert.match(code, /^index\s*=/m)
 You should assign the value returned by `alphabet.find(text[0])` to your `index` variable.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 34166fe3da4..83feddb9318 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `H`, is not found, since `alphabet` contains only lowercase letters.
+`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `'H'`, is not found, since `alphabet` contains only lowercase letters.
 
 You can transform a string into its lowercase equivalent with the `.lower()` method. Add another `print()` call to print `text.lower()` and see the output.
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index 54d47cf3f49..9a554ddeef1 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -27,7 +27,7 @@ assert.match(code, /^print\s*\(\s*index\s*\)/m);
 You should update your `alphabet.find(text[0])` call to use `text[0].lower()` as the argument. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index 95e2567fa84..e4c0036ebff 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-As you can see from the output, `h` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
+As you can see from the output, `'h'` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
 
 Modify your `shifted` variable so that it stores the value of `alphabet` at index `index + shift`.
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index 41811515713..a8da79ffd22 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -35,14 +35,14 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i/m)
 ```
 
-You should write the `in` keyword after `for i `. Make sure to leave a space around the `in` keyword.
+You should write the `in` keyword after `for i`. Make sure to leave a space around the `in` keyword.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i\s+in\s+/m)
 ```
 
-You should write `text` after `for i in `. Don't forget to add the final `:`.
+You should write `text` after `for i in`. Don't forget to add the final `:`.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index b7051de41c3..bdf47ed7c6f 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -7,7 +7,7 @@ dashedName: step-42
 
 # --description--
 
-Currently, spaces get encrypted as `c`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
+Currently, spaces get encrypted as `'c'`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
 
 ```py
 if x != 0:
@@ -16,7 +16,7 @@ if x != 0:
 
 In the example above, the condition of the `if` statement is `x != 0`. The code `print(x)`, inside the `if` statement body, runs only when the condition evaluates to `True` (in this example, meaning that `x` is different from zero).
 
-At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `space!`. Remember to indent this line.
+At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `'space!'`. Remember to indent this line.
 
 # --hints--
 
@@ -36,7 +36,7 @@ const {block_body} = __helpers.python.getBlock(commentless_code, /for\s+char\s+i
 assert(block_body.match(/if\s+char\s*==\s*("|')\s\1\s*:/));
 ```
 
-You should print the string `space!` inside your new `if` statement.
+You should print the string `'space!'` inside your new `if` statement.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index 69191130521..f3fc108e506 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, instead of printing `space!`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
+Now, instead of printing `'space!'`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index dfc91239b0e..f6ea23b4325 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Try to assign the string `Hello Zaira` to your `text` variable and see what happens in the console.
+Try to assign the string `'Hello Zaira'` to your `text` variable and see what happens in the console.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have a `text` variable.
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello Zaira` to your `text` variable.
+You should assign the string `'Hello Zaira'` to your `text` variable.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello\sZaira\1/m)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index 5629c8d00fb..b5f4088d3b7 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -7,7 +7,7 @@ dashedName: step-58
 
 # --description--
 
-Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `python` to this variable.
+Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `'python'` to this variable.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should declare a variable called `custom_key`.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should assign the string `python` to your `custom_key` variable.
+You should assign the string `'python'` to your `custom_key` variable.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "python") })
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 179f7313a5d..47211f5e8bc 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -7,8 +7,7 @@ dashedName: step-59
 
 # --description--
 
-Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text.
-At the beginning of your function body, declare a `key_index` variable and set it to zero.
+Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text. At the beginning of your function body, declare a `key_index` variable and set it to zero.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 660fb4ab263..7e452e05438 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
 
     for char in message.lower():
 --fcc-editable-region--
-        
+
         if char == ' ':
             encrypted_text += char
 --fcc-editable-region--            
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7727f6c57a8..7ca155b0c73 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -7,8 +7,7 @@ dashedName: step-62
 
 # --description--
 
-You will need to increase the `key_index` count for the next iteration.
-To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
+You will need to increase the `key_index` count for the next iteration. To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index 67567e88cdf..a6cd4a9a348 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
         if char == ' ':
             encrypted_text += char
         else:
-            
+
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index da202c1490a..7ca3ec197c0 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -50,7 +50,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key):
             # Find the right key character to encode
             key_char = key[key_index % len(key)]
             key_index += 1
-            
+
 --fcc-editable-region--            
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index 7ca7c2f323a..f783cbf3472 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -32,7 +32,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -41,7 +41,7 @@ def vigenere(message, key):
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
-            
+
             offset = alphabet.index(key_char)
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index a371865b1ef..28c793c06c3 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -55,7 +55,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index 60289b5525e..acf5b0f71c8 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -43,7 +43,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -57,7 +57,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index b1f7c3a5caa..87f8a5aa7f3 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -31,7 +31,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 534ff69ec91..84f3a8477e1 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -46,7 +46,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -60,9 +60,9 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index 3dfdd998a92..d29b009f3cf 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -47,9 +47,9 @@ def vigenere(message, key, direction):
             new_index = (index + offset) % len(alphabet)
 --fcc-editable-region--
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 #encryption = vigenere(text, custom_key)
 #print(encryption)
 ```
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 330871bc52a..9f1ea94390c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,9 +45,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 --fcc-editable-region--
 #encryption = vigenere(text, custom_key)
 #print(encryption)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index db2c5bdfe33..adf869e6b5f 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index b4b329858a2..8e744b4c09f 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index f49b76f417f..cd7e9ce3a58 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -39,7 +39,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -53,7 +53,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index b295655e5c6..a6ecf2194d0 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -38,7 +38,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -52,9 +52,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index 521f1f961d3..d77bcd5d985 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -19,7 +19,7 @@ You should have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should be equal to the string `Hello Zaira!`.
+Your `text` variable should be equal to the string `'Hello Zaira!'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "Hello Zaira!") })
@@ -40,7 +40,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -54,9 +54,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index f9dfeed2c7d..a60afdc14cc 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -53,9 +53,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index fa8531f3421..40bfdb53982 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -48,9 +48,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index aba2d5665d2..822b22f2743 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -46,9 +46,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index a8a4a146373..82df5c7e409 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -70,7 +70,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index 900a42440bf..ceda0450cc8 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -51,7 +51,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index b37f689c14a..c0d946a1d38 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index d863b1b5667..e86470c6c34 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -51,15 +51,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index e7e001fd7b2..cb2c9d5e191 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -9,7 +9,7 @@ dashedName: step-86
 
 It works! Now, you are going to start with an encrypted message to be decrypted.
 
-Change the value of `text` to the string `mrttaqrhknsw ih puggrur`.
+Change the value of `text` to the string `'mrttaqrhknsw ih puggrur'`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should still have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should have the value of `mrttaqrhknsw ih puggrur`.
+Your `text` variable should have the value of `'mrttaqrhknsw ih puggrur'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "mrttaqrhknsw ih puggrur") })
@@ -54,15 +54,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = encrypt(text, custom_key)
 print(encryption)
 decryption = decrypt(encryption, custom_key)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index 7295239a2e5..a2e43552133 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -46,7 +46,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -60,9 +60,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 582c138e1b3..3cfffa05b63 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index 43650a129a7..b809b6cc227 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -9,11 +9,11 @@ dashedName: step-88
 
 Two or more strings can be concatenated by using the `+` operator. For example: `'Hello' + ' there!'` results in `'Hello there!`.
 
-Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `Encrypted text: `. Pay attention to the spacing.
+Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `'Encrypted text: '`. Pay attention to the spacing.
 
 # --hints--
 
-You should call `print()` and pass `'Encrypted text: ' + text` as the arguments. 
+You should call `print()` and pass `'Encrypted text: ' + text` as the arguments.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--    
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index 68b96128144..bb3bf128cf9 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -7,11 +7,11 @@ dashedName: step-89
 
 # --description--
 
-Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 # --hints--
 
-You should have a `print()` call that prints `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+You should have a `print()` call that prints `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -52,12 +52,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index e52496dd150..6d5c9a3c856 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -7,7 +7,7 @@ dashedName: step-90
 
 # --description--
 
-In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings. 
+In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings.
 
 Interpolation means writing placeholders that will be replaced by the specified values when the program runs. For example, you can get the same result of `'Encrypted text: ' + text` with `f'Encrypted text: {text}'`. You need to put an `f` before the quotes to create the f-string and write the variables or expressions you want to interpolate between curly braces.
 
@@ -49,12 +49,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index ebdb8b79456..4e28d4737fc 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index 8e107b0fff4..d55577ba1cf 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -47,12 +47,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 0f916bf649e..073dfdcd2bb 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -50,12 +50,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 23af806c5ce..006a04850ea 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -7,7 +7,7 @@ dashedName: step-95
 
 # --description--
 
-Wait a minute! You cannot decrypt anything with the wrong key. Try with `happycoding`.
+Wait a minute! You cannot decrypt anything with the wrong key. Try with `'happycoding'`.
 
 With that, your cipher project is complete.
 
@@ -19,7 +19,7 @@ You should still have a `custom_key` variable.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should modify the `custom_key` value into `happycoding`.
+You should modify the `custom_key` value into `'happycoding'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "happycoding") })
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
@@ -96,12 +96,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 05c44517e6f..9a4c27f1945 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -7,8 +7,7 @@ dashedName: step-41
 
 # --description--
 
-Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare.
-They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
+Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare. They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
 
 Python has the following comparison operators:
 
@@ -47,11 +46,11 @@ Python has the following comparison operators:
   </tbody>
 </table>
 
-At the beginning of your loop body, print the result of comparing `char` with an empty space (`' '`). Use the equality operator `==` for that.
+At the beginning of your loop body, print the result of comparing `char` with a space (`' '`). Use the equality operator `==` for that.
 
 # --hints--
 
-You should compare `char` with an empty space using the equality operator inside your `for` loop.
+You should compare `char` with a space using the equality operator inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -62,7 +61,7 @@ You should compare `char` with an empty space using the equality operator inside
 })
 ```
 
-You should print the result of comparing `char` with an empty space inside your `for` loop.
+You should print the result of comparing `char` with a space inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -73,7 +72,7 @@ You should print the result of comparing `char` with an empty space inside your
 })
 ```
 
-You should print the result of comparing `char` with an empty space at the beginning of your loop.
+You should print the result of comparing `char` with a space at the beginning of your loop.
 
 ```js
 ({ test: () => {
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 34e53a7cc4f..86a5a8baa9a 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -18,7 +18,7 @@ Give your `for` loop a body by adding a call to `print(i)`. Remember to indent t
 
 # --hints--
 
-You should add `print(i)` to your `for` loop body. Pay attention to the indentation. 
+You should add `print(i)` to your `for` loop body. Pay attention to the indentation.
 
 ```js
 assert.match(code, /^for\s+i\s+in\s+text:\s+print\s*\(\s*i\s*\)/m)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index e7886b5f796..042349ee0a4 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -15,7 +15,7 @@ Restore the indentation for your `print(i)` call.
 
 # --hints--
 
-You should indent `print(i)` inside your `for` loop body. 
+You should indent `print(i)` inside your `for` loop body.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index 6215b77a724..f971dfe2276 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -13,7 +13,7 @@ Rename your `i` variable to `char`.
 
 # --hints--
 
-You should replace `i` with `char`. 
+You should replace `i` with `char`.
 
 ```js
 assert.match(code, /^for\s+char\s+in\s+text:\s+print\s*\(\s*char\s*\)/m)
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index b2203350e08..97fee73da43 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -7,7 +7,7 @@ dashedName: step-31
 
 # --description--
 
-Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `train`, but this is not valid:
+Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `'train'`, but this is not valid:
 
 ```py
 my_string = 'brain'
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index 39784236282..e2b04ef618e 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -14,7 +14,7 @@ message = 'Hello World'
 message = 'Hello there!'
 ```
 
-Delete the `text[0]` line and reassign `text` the string `Albatross`.
+Delete the `text[0]` line and reassign `text` the string `'Albatross'`.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*\[\s*0\s*\]\s*\=\s*("|')\w\1/.test(commentless_code));
 ```
 
-You should reassign `text` the string `Albatross`. Do not modify `text = 'Hello World'`.
+You should reassign `text` the string `'Albatross'`. Do not modify `text = 'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 076a71f8786..6b04513e34d 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -20,7 +20,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*=\s*("|')Albatross\1/.test(commentless_code))
 ```
 
-You should still have a `text` variable with the value `Hello World`.
+You should still have a `text` variable with the value `'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index 442d9c6cb33..a98c25c7099 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index 71e999219ba..d239d653b25 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
index 7c651e4ea00..54999170e05 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
@@ -16,13 +16,13 @@ Delete `pass` and recursively call the `_insert` method on the left child of the
 You should call the `self._insert` method passing `node.left` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the `left` attribute of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
index e83dc278aaf..0191977d8fe 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
@@ -14,13 +14,13 @@ Inside your `elif` clause, replace `pass` with a call to the `_insert` method on
 You should call the `self._insert()` method passing `node.right` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the right attribute (`node.right`) of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
index 26167b8d18c..1ccc880f49e 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
@@ -25,7 +25,7 @@ You should call the `_search` method within the `search` method.
 You should call the `_search` method passing `self.root` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
index 673f7cf5133..e13a859c2ba 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
@@ -14,7 +14,7 @@ Now, make the `search` method return the result of the `_search()` call.
 You should prepend the `return` statement to your `_search()` call.
 
 ```js
-({ test: () => assert.match(code, /return\s+self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /return\s+self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
index c7c9a6ab5bd..36756f3e43e 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
@@ -22,8 +22,8 @@ assert.match(after_split, /if\s+key\s+<\s+node\.key/);
 
 You should return `self._search(node.left, key)` from your new `if` block.
 
-```js    
-({ test: () => assert.match(code, /return\s+self\._search\(node\.left,\s*key\)/) });    
+```js
+({ test: () => assert.match(code, /return\s+self\._search\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
index 70aa95767db..ceb1abda581 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
@@ -25,14 +25,14 @@ assert.match(after_split, /self\._search/);
 You should pass two arguments to the call of the `_search` method: `node.right` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should return the result of the `_search` method call.
 
 ```js
 ({
-  test: () => assert.match(code, /return\s+self\._search\(node\.right,\s*key\)/)
+  test: () => assert.match(code, /return\s+self\._search\(\s*node\.right,\s*key\s*\)/)
 });
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
index 47283b3b2da..57816ca6bc7 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
@@ -18,7 +18,7 @@ Within the `BinarySearchTree` class, define a `delete` method. It takes two para
 You should define a `delete` method with two parameters: `self` and `key`. Remember to use `pass`.
 
 ```js
-({ test: () => assert.match(code, /def\s+delete\(self,\s*key\)/) });
+({ test: () => assert.match(code, /def\s+delete\(\s*self,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
index da2b8942828..56116438820 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
@@ -14,7 +14,7 @@ Inside the `delete` method, delete `pass` and call the private helper method `_d
 Your `delete` method should call the `_delete` method with two arguments: `self.root` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
index 20ee3d48f5f..07091bb1960 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
@@ -16,7 +16,7 @@ To handle this case, assign the result of the `_delete` call to `self.root`.
 You should assign the result of the `_delete()` call to `self.root`.
 
 ```js
-({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
index 76e9378da78..0680a3f5d1a 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
@@ -14,7 +14,7 @@ Inside the `BinarySearchTree` class, define a new helper method called `_delete`
 You should define the `_delete` method inside the `BinarySearchTree` class with the parameters `self`, `node` and `key`. Remember to use the `pass` keyword.
 
 ```js
-assert.match(code, /def\s+_delete\(self,\s*node,\s*key\)/);
+assert.match(code, /def\s+_delete\(\s*self,\s*node,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
index a6f98e0d99d..6ce1e655468 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
@@ -14,13 +14,13 @@ Within the `if` block, replace `pass` with a call to the `_delete` method, passi
 You should call the `_delete` method with `node.left` and the `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to the left child (`node.left`) of the current node.
 
 ```js
-assert.match(code, /node\.left\s*=\s*self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /node\.left\s*=\s*self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
index d94223677bf..d1390ccd45b 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
@@ -23,13 +23,13 @@ assert.match(after_split, /elif\s+key\s+>\s+node\.key/);
 You should call the `_delete` method with `node.right` and `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to `node.right`.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
index cec0669e36a..8877d2ebd95 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
@@ -20,7 +20,7 @@ For now, add a `_min_value` call after your `elif` block, passing `node.right` a
 You should assign `self._min_value(node.right)` to `node.key` after your `elif` block.
 
 ```js
-assert.match(code, /node\.key\s*=\s*self\._min_value\(node\.right\)/);
+assert.match(code, /node\.key\s*=\s*self\._min_value\(\s*node\.right\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
index acafc733cda..9a7189997a0 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
@@ -22,7 +22,7 @@ assert.match(code, /self\._delete\(\s*node\.right\s*,\s*node\.key\s*/);
 You should assign the return value of the `_delete()` call to the right child of the current node.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right\,\s*node\.key/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right\,\s*node\.key/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
index 130fb906a79..7878850cf4c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
@@ -16,7 +16,7 @@ This will start the traversal from the root of the binary search tree (`self.roo
 You should call `_inorder_traversal` and pass `self.root` and `result` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._inorder_traversal\(self\.root,\s*result\)/) })
+({ test: () => assert.match(code, /self\._inorder_traversal\(\s*self\.root,\s*result\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
index 7ecae2f1c3d..0db007af39a 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
@@ -14,7 +14,7 @@ Define the `_inorder_traversal` method and give it three parameters: `self`, `no
 You should define a method `_inorder_traversal` that takes three parameters: `self`, `node`, and `result`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+_inorder_traversal\(self,\s*node,\s*result\)/);
+assert.match(code, /def\s+_inorder_traversal\(\s*self,\s*node,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
index 636ba835994..87a17caa633 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
@@ -20,7 +20,7 @@ assert.match(code, /if\s+node:/);
 You should call `_inorder_traversal` on the `node.left` inside the `if` block.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.left\s*,\s*result\s*\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.left\s*,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
index b4601dd037e..3fee614b1c2 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
@@ -14,7 +14,7 @@ Still inside the `if` block, append the `key` of the current node to the `result
 You should append `node.key` to the `result` list.
 
 ```js
-assert.match(code, /result\.append\(node\.key\)/);
+assert.match(code, /result\.append\(\s*node\.key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
index 639c3db5c87..db3887a0265 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
@@ -16,13 +16,13 @@ Create an instance of the `BinarySearchTree` class and assign it to the variable
 You should create an instance of the `BinarySearchTree` class.
 
 ```js
-assert.match(code, /BinarySearchTree\(\)/);
+assert.match(code, /BinarySearchTree\(\s*\)/);
 ```
 
 You should assign the new instance of `BinarySearchTree` to the variable `bst`.
 
 ```js
-assert.match(code, /bst\s*=\s*BinarySearchTree\(\)/);
+assert.match(code, /bst\s*=\s*BinarySearchTree\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
index 19a94017454..bd453c8841a 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
@@ -20,7 +20,7 @@ assert.match(code, /nodes/);
 Your `node` variable should have the value `[50, 30, 20, 40, 70, 60, 80]`.
 
 ```js
-assert.match(code, /nodes\s*=\s*\[50,\s*30,\s*20,\s*40,\s*70,\s*60,\s*80\]/);
+assert.match(code, /nodes\s*=\s*\[\s*50\s*,\s*30\s*,\s*20\s*,\s*40\s*\s*,\s*70\s*,\s*60\s*,\s*80\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
index 27af11fd7ac..b09ecadea3b 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
@@ -16,7 +16,7 @@ This recursive call explores the entire right subtree in an in-order manner.
 You should call `_inorder_traversal` passing `node.right` and `result` as the arguments.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.right,\s*result\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.right,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
index 81f0f487f38..e76eeda5686 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
@@ -16,7 +16,7 @@ To change that to print a useful value, define another method named `__str__` in
 You should define a method `__str__` that takes a single argument `self`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+__str__\(self\)/);
+assert.match(code, /def\s+__str__\(\s*self\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
index 81e478c2e94..d92029bf10c 100644
--- a/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
+++ b/curriculum/challenges/chinese-traditional/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
@@ -14,7 +14,7 @@ In the body of the `__str__` method, delete `pass` and return the result of call
 You should return the string value of `self.key` from your `__str__` method.
 
 ```js
-({ test: () => assert.match(code, /^\s{8}return\s+str\(self\.key\)/m) })
+({ test: () => assert.match(code, /^\s{8}return\s+str\(\s*self\.key\s*\)/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md b/curriculum/challenges/chinese-traditional/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
index d1acc4f88ed..22971e3326a 100644
--- a/curriculum/challenges/chinese-traditional/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
+++ b/curriculum/challenges/chinese-traditional/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
@@ -13,16 +13,12 @@ Lastly change the text color of the `terms and conditions` link element to `#dfd
 
 # --hints--
 
-你應該使用 `a` 元素選擇器。
-
-```js
-assert.exists(new __helpers.CSSHelp(document).getStyle('a'));
-```
 
 你應該爲 `a` 元素添加值爲 `#dfdfe2` 的 `color`。
 
 ```js
-assert.equal(new __helpers.CSSHelp(document).getStyle('a')?.color, 'rgb(223, 223, 226)');
+const linkElement = document.querySelector("a");
+assert.equal(window.getComputedStyle(linkElement)?.color, 'rgb(223, 223, 226)');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
index 6034c4b6c8a..d8f61efb24c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
@@ -10,11 +10,9 @@ dashedName: build-a-cash-register
 
 Here you'll build a cash register app that will return change to the customer based on the price of the item, the amount of cash provided by the customer, and the amount of cash in the cash drawer. You'll also need to show different messages to the user in different scenarios, such as when the customer provides too little cash or when the cash drawer doesn't have enough to issue the correct change.
 
-There are a few variables you'll need to use in your code:
+In the `script.js` file, you have been provided with the `price` and `cid` variables. The `price` variable is the price of the item, and the `cid` variable is the cash-in-drawer, which is a 2D array listing the available currency in the cash drawer.
 
-- `price`：商品的價格，以浮點數表示。
-- `cash`：顧客爲商品提供的現金金額，通過頁面上的`input`元素來提供。
-- `cid`：現金抽屜，一個列出現金抽屜中可用貨幣的二維數組。
+The other variable you will need add is the `cash` variable, which is the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
 
 If you'd like to test your application with different values for `price` and `cid`, make sure to declare them with the `let` keyword so they can be reassigned by our tests.
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
index 04d76b0f7a2..3f11a1090bc 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
@@ -28,10 +28,10 @@ In this project, you'll build an app that will search for Pokémon by name or ID
 1. You should have an element with an `id` of `special-defense`
 1. You should have an element with an `id` of `speed`
 1. When the `#search-input` element contains the value `Red` and the `#search-button` element is clicked, an alert should appear with the text `Pokémon not found`
-1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
+1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the `#types` element should contain a single inner element with the value `ELECTRIC`. The `#types` element content should be cleared between searches
-1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
+1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed`elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the `#types` element should contain two inner elements with the text values `GHOST` and `POISON`, respectively. The `#types` element content should be cleared between searches
 
@@ -158,7 +158,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
+When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
 
 ```js
 async () => {
@@ -251,7 +251,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
+When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
 
 ```js
 async () => {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
index 83c39dfe47f..be9974d7f7e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
@@ -11,7 +11,7 @@ Now that you have the value of the input, you need to split it into an array of
 
 The `.split()` method takes a string and splits it into an array of strings. You can pass it a string of characters or a RegEx to use as a separator. For example, `string.split(",")` would split the string at each comma and return an array of strings.
 
-Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces seperating your values. Store the array in an `array` variable.
+Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces separating your values. Store the array in an `array` variable.
 
 # --hints--
 
@@ -36,7 +36,7 @@ assert.match(code.toString(),  /array\s*=\s*value\.split()/);
 You should use `/,\s*/g` for the `split()` method's separator.
 
 ```js
-assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\)/);
+assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
index 79efd11e2f6..797f67b6d1c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
@@ -22,7 +22,7 @@ assert.match(calculate.toString(), /numbers/);
 You should use the `.map()` method on your `array` variable.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\)/);
+assert.match(calculate.toString(), /array\.map\(\s*\)/);
 ```
 
 You should assign the result of your `.map()` call to your `numbers` variable.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
index c6e423add21..fa7a472ae10 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
@@ -24,7 +24,7 @@ Add a callback function to your `.map()` method that converts each element to a
 Your `.map()` method should have a callback function which takes an `el` parameter.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use the `Number` constructor to convert `el` to a number.
@@ -42,7 +42,7 @@ assert.notMatch(calculate.toString(), /new/);
 Your callback function should return the element converted to a number.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
index 8fd20b8f2c5..31d5cc49413 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
@@ -24,13 +24,13 @@ assert.match(calculate.toString(), /filtered/);
 Your `calculate` function should use the `.filter()` method on the `numbers` array.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\)/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*\)/)
 ```
 
 You should assign the result of `numbers.filter()` to the `filtered` variable.
 
 ```js
-assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\)/);
+assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
index bc2f0dd7342..9bbea45f521 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
@@ -26,7 +26,7 @@ Add a callback function to your `.filter()` method that returns `true` if the el
 Your `.filter()` method should have a callback which accepts `el` as a parameter.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use `!` and `isNaN()` to check if `el` is NOT `NaN`.
@@ -38,7 +38,7 @@ assert.match(calculate.toString(), /!\s*(Number\.)?isNaN\(\s*el\s*\)/);
 Your callback function should return elements that are not `NaN`.
 
 ```js
-assert.match(calculate.toString(), /(numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
index 811d2ee0079..738b547c0a1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
@@ -28,20 +28,19 @@ assert.notMatch(calculate.toString(), /filtered/);
 You should chain your `.filter()` call to your `.map()` call.
 
 ```js
-console.log(calculate.toString());
 assert.match(calculate.toString(), /array\.map\(.*\)\.filter\(/s);
 ```
 
 You should not remove the `.map()` callback.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 You should not remove the `.filter()` callback.
 
 ```js
-assert.match(calculate.toString(), /(\.filter\(\(?\s*el\s*\)?\s*=>|\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
+assert.match(calculate.toString(), /(\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
index 7c0a447b6cc..2cc8f0fad7d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
@@ -22,13 +22,13 @@ assert.match(getMean.toString(), /sum/);
 Your `getMean` function should use the `.reduce()` method of the `array` parameter.
 
 ```js
-assert.match(getMean.toString(), /array\.reduce\(\)/);
+assert.match(getMean.toString(), /array\.reduce\(\s*\)/);
 ```
 
 You should assign the result of `array.reduce()` to the `sum` variable.
 
 ```js
-assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\)/);
+assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
index 0b22c85ca6a..a2575abeba3 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
@@ -22,13 +22,13 @@ For your `sum` variable, pass a callback to `.reduce()` that takes the accumulat
 Your `reduce` method should have a callback function which takes an `acc` and an `el` parameters.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)/)
 ```
 
 Your `reduce` method should return the sum of `acc` and `el`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
index 420b532aa92..07858e7dec0 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
@@ -22,7 +22,7 @@ Set the initial value of the accumulator to `0`.
 Your `reduce` method should have `0` as the initial value.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
index d15924ec709..83b3eee67c2 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
@@ -28,19 +28,19 @@ assert.notMatch(getMean.toString(), /mean\s*=/);
 You should not change the logic within the `reduce` method.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 You should divide the result of the `reduce` method by the length of the array.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)\s*\/\s*array\.length/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 You should use implicit return syntax to directly return the result of `reduce` divided by the array length.
 
 ```js
-assert.match(code, /const\s+getMean\s*=\s*\(?array\)?\s*=>\s*array\.reduce\(\(acc\s*,\s*el\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
+assert.match(code, /const\s+getMean\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
index b343b95d87f..d285852f92a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
@@ -18,13 +18,13 @@ To sort your numbers from smallest to largest, pass a callback function that tak
 Your `sort` method should have a callback function which takes an `a` and a `b` parameters.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)/)
 ```
 
 Your `sort` method should return the result of subtracting `b` from `a`.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
index 695579834a9..97bb9ef0e04 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
@@ -34,13 +34,13 @@ assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0
 If `array.length` is even, pass an array with the two middle numbers from the `sorted` array to the `getMean` function. The first item in the array argument should be the value at index `array.length / 2` from `sorted` and the second should use the value at the index `array.length / 2 - 1` from `sorted`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:/);
 ```
 
 If the `array.length` is odd, your `median` variable should assign the middle number to the `median` variable. The middle number is the value of `sorted` at `Math.floor(array.length / 2)`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:\s*sorted\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\)\];/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:\s*sorted\s*\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\s*\)\s*\]\s*;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
index 0f80bd629be..e38537ed779 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
@@ -22,13 +22,13 @@ assert.match(calculate.toString(), /median\s*=/);
 Your `median` variable should be assigned the value of `getMedian(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /median\s*=\s*getMedian\(numbers\)/);
+assert.match(calculate.toString(), /median\s*=\s*getMedian\(\s*numbers\s*\)/);
 ```
 
 Your `calculate` function should query the DOM for the `#median` element and set the `textContent` to `median`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#median\1\)\.textContent\s*=\s*median/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#median\1\s*\)\.textContent\s*=\s*median/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
index 17de177df31..cca770ac426 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
@@ -22,14 +22,13 @@ assert.match(getMode.toString(), /array\.forEach\(/);
 Your `.forEach()` method should have a callback function which takes an `el` parameter.
 
 ```js
-console.log(getMode.toString());
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)/);
 ```
 
 Your `.forEach()` method should increment the count for each number. Don't forget the fallback value.
 
 ```js
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)\s*\{?\s*(return)?\s*counts\[\s*el\s*\]\s*=\s*\(\s*counts\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)\s*\{?\s*(return)?\s*counts\s*\[\s*el\s*\]\s*=\s*\(\s*counts\s*\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
index cf3989dfb23..38eab8ab27a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
@@ -24,19 +24,19 @@ assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.so
 Your `getMode` function should pass a callback to the `sort` method with parameters `a` and `b`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)/)
 ```
 
 Your `getMode` function should use the `sort` method to sort the `Object.keys()` array and return the value of `counts[b]` minus the value of `counts[a]`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)/)
 ```
 
 Your `highest` variable should have the value of the first entry in the sorted `Object.keys(counts)` array.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)\[0\];/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)\s*\[\s*0\s*\]\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
index 985b3c31f5b..89f9c9c5683 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
@@ -20,13 +20,13 @@ assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filte
 Your `.filter()` method should take a callback function with a parameter `el`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)/);
 ```
 
 Your `.filter()` method should return whether the value of `counts[el]` is equal to `counts[highest]`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\[\s*el\s*\]\s*===\s*counts\[\s*highest\s*\];\s*\}/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\s*\[\s*el\s*\]\s*===\s*counts\s*\[\s*highest\s*\]\s*;\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
index 9ef808c7073..a4b0e3eee91 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /mode\s*=\s*getMode\(\s*numbers\s*\);/);
 Your `calculate` function should query the DOM for the `#mode` element and set the `textContent` to `mode`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#mode\1\)\.textContent\s*=\s*mode;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#mode\1\s*\)\.textContent\s*=\s*mode;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
index c88ce39ce83..e395102a36f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
@@ -12,7 +12,10 @@ Your next calculation is the <dfn>range</dfn>, which is the difference between t
 You previously learned about the global `Math` object. `Math` has a `.min()` method to get the smallest number from a series of numbers, and the `.max()` method to get the largest number. Here's an example that gets the smallest number from an array:
 
 ```js
-Math.min(1, 9, 11, -3, 0.5);
+const numbersArr = [2, 3, 1];
+
+console.log(Math.min(...numbersArr));
+// Expected output: 1
 ```
 
 Declare a `getRange` function that takes the same `array` parameter you have been using. Using `Math.min()`, `Math.max()`, and the spread operator, return the difference between the largest and smallest numbers in the list.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
index d562fff11bf..1bd4f6e9c83 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
@@ -14,13 +14,13 @@ Add the logic for calculating and displaying the range to your `calculate` funct
 Your `calculate` function should set a `range` variable to the result of `getRange(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /range\s*=\s*getRange\(numbers\);/);
+assert.match(calculate.toString(), /range\s*=\s*getRange\(\s*numbers\s*\);/);
 ```
 
 Your `calculate` function should set the `#range` element's `textContent` to the `range` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#range\1\)\.textContent\s*=\s*range;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#range\1\s*\)\.textContent\s*=\s*range;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
index 44250c299fc..9687bba9a9e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
@@ -26,13 +26,13 @@ assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(/);
 Your `differences` variable should use the `el` parameter in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Your `map` callback should return the value of `el` minus `mean`.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
index 129ec361cc7..fdc879e82b6 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
@@ -28,13 +28,13 @@ assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\
 Your `squaredDifferences` variable should use the `el` parameter in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Your `map` callback should return the value of `el` squared.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
 ```
 
 Your `map` callback should use the `**` operator.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
index a2b550ebf67..2d66881b2c4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
@@ -28,14 +28,13 @@ assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDiffere
 Your `sumSquaredDifferences` variable should use the `acc` and `el` parameters in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Your `reduce` callback should return the sum of `acc` and `el`.
 
 ```js
-console.log(getVariance.toString());
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
index a9de0de327d..07069778076 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
@@ -46,19 +46,19 @@ assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(/);
 Your `variance` variable should use the `acc` and `el` parameters in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Your `reduce` callback should be an empty function.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}/);
 ```
 
 Your `reduce` callback should have an initial value of `0`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}\s*,\s*0\s*\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
index a144d66e015..f77567d2294 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
@@ -14,37 +14,37 @@ Within your empty `.reduce()` callback, declare a variable `difference` and set
 Your `reduce` callback should have a `difference` variable.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=/);
 ```
 
 Your `difference` variable should be set to the value of `el` minus `mean`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
 ```
 
 Your `reduce` callback should have a `squared` variable.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
 ```
 
 Your `squared` variable should be set to the value of `difference` to the power of 2.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
 ```
 
 Your `reduce` callback should return the value of `acc` plus `squared`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
 ```
 
 You should not remove the initial value of `0` from your `.reduce()` method.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
index 117861dc74e..9e366ddf03b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
@@ -16,7 +16,7 @@ Divide your `.reduce()` call by the length of the array (in your `variance` decl
 You should divide the result of the `.reduce()` call by the length of the array.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)\s*\/\s*array\.length;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)\s*\/\s*array\.length;/);
 ```
 
 You should return the value of `variance`.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
index 2d2caf9b81e..7a9b4437bd8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /variance\s*=\s*getVariance\(\s*numbers\s*\)/
 You should set the `textContent` of the `#variance` element to the value of the `variance` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#variance\1\)\.textContent\s*=\s*variance/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#variance\1\s*\)\.textContent\s*=\s*variance/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
index 015e50b74a6..fac72b8c424 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
@@ -14,13 +14,13 @@ Now update the `calculate` function to include the standard deviation logic, lik
 Your `calculate` function should have a `standardDeviation` variable set to the result of `getStandardDeviation(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(numbers\)/);
+assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(\s*numbers\s*\)/);
 ```
 
 You should update the `textContent` of the `#standardDeviation` element to be the `standardDeviation` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#standardDeviation\1\)\.textContent\s*=\s*standardDeviation/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#standardDeviation\1\s*\)\.textContent\s*=\s*standardDeviation/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
index 4199c04d697..fb7d52b878f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
@@ -16,19 +16,19 @@ To fix this, add an empty `.slice()` call before your `.sort()` method. The empt
 You should call `.slice()` on the `array` parameter.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)/);
 ```
 
 Your `.sort()` call should be chained to the `.slice()` call.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(/);
 ```
 
 You should not modify the `.sort()` method callback.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
index b728e38a833..2ca651313c1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
@@ -24,7 +24,7 @@ Use the `async` keyword to create an asynchronous arrow function called `fetchDa
 You should use the `async` keyword to create an asynchronous arrow function called `fetchData`.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*[^}]*\s*}/);
 ```
 
 `fetchData` should be defined.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
index 9bfc75127ba..e25f8c6e6e4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
@@ -37,7 +37,7 @@ assert.match(code, /\s*const\s+res\s*=\s*await\s+fetch\(\s*(.*)\s*\)/);
 You should pass in the `forumLatest` constant to the `fetch` call.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
index 689dc96d212..116e515f57a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+data/);
 You should assign `await res.json()` to the `data` variable.
 
 ```js
-assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\);?\s*/);
+assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
index da52b35bb6d..5bfdf5e2d0f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
@@ -28,7 +28,7 @@ assert.match(code, /\s*try\s*{[\s\S]*\s*console\.log\(\s*data\s*\)[\s\S]*}\s*cat
 You should call the `fetchData()` function, after the `fetchData()` function is defined.
 
 ```js
-assert.match(code, /};?\s*fetchData\(\)/);
+assert.match(code, /};?\s*fetchData\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
index 05baa895a74..a913ea59caa 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
@@ -22,7 +22,7 @@ assert.match(code, /\s*showLatestPosts\(.*\);??\s*/);
 You should pass `data` as the argument to `showLatestsPosts()`.
 
 ```js
-assert.match(code, /\s*showLatestPosts\(data\);?\s*/);
+assert.match(code, /\s*showLatestPosts\(\s*data\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
index 527d6540d9a..fa73f77cce5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
@@ -20,7 +20,7 @@ assert.match(code, /\s*const\s+thousands\s*=/);
 Your should assign `Math.floor(views / 1000)` to your `thousands` variable.
 
 ```js
-assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(views\s*\/\s*1000\)\s*/);
+assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(\s*views\s*\/\s*1000\s*\)\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
index 989339eab2b..070e6102c7f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
@@ -14,7 +14,7 @@ Inside the `if` statement, destructure `className` and `category` from the `allC
 You should destructure `className` and `category` from the `allCategories[id]` object. The properties can be in any order.
 
 ```js
-assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\[id\]\s*/g));
+assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\s*\[\s*id\s*\]\s*/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
index 4e6a93bdd01..1d71261673e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
@@ -27,19 +27,19 @@ Inside your `fetchData` function, add a `try...catch` statement. The `catch` blo
 You should have a `try` block inside your `fetchData` function.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
 ```
 
 You should have a `catch` block after your `try` block.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
 ```
 
 Your `catch` block should have an `err` parameter.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
 ```
 
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
index 03197bc9e76..0d969dd0637 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+postsContainer\s*=/);
 You should use `document.getElementById()` to get the `#posts-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)posts-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/);
 ```
 
 You should assign the `#posts-container` element to your `postsContainer` variable.
 
 ```js
-assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(('|"|`)posts-container\1\)/g));
+assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
index 696a11ddbf4..e5af69a01c3 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
@@ -14,7 +14,7 @@ You will be using this as an event listener for the `sortButton`. Because button
 Your `sortInputArray` function should call `event.preventDefault()`.
 
 ```js
-assert.match(sortInputArray.toString(), /event\.preventDefault\(\)/);
+assert.match(sortInputArray.toString(), /event\.preventDefault\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
index 50ad81678e1..f07f7445275 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*
 You should assign `temp` the value of `array[j]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?/);
 ```
 
 You should assign `array[j]` the value of `array[j + 1]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?/);
 ```
 
 You should assign `array[j + 1]` the value of `temp`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
index ef52fbcac63..77df564297e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished executing, return the sorted array.
 You should `return` the `array` variable.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
index fe024a70e21..3ccf14190fd 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
@@ -17,7 +17,7 @@ You should remove your `console.log()` call.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(bubbleSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(bubbleSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
index b424908b739..2f4a20aa7cd 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{
 You should assign `array[i]` to `temp`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]/)
 ```
 
 You should assign `array[minIndex]` to `array[i]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]/)
 ```
 
 You should assign `temp` to `array[minIndex]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
index 018d21464b8..a20efe2965c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished, you need to return the array. Once
 You should `return` the `array` after your outer loop completes.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
index 4ae567df3c4..09bdce3a012 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
@@ -15,7 +15,7 @@ You should remove the `console.log()` statement from `selectionSort()`.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(selectionSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(selectionSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
index c74f146c31a..ef25b02d922 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
@@ -16,7 +16,7 @@ Do so by assigning the value at the `j` index to the next index.
 Before decrementing `j`, assign the value at `j` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
index 308101479c0..6025117fa30 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
@@ -16,7 +16,7 @@ Use the assignment operator to insert your current value into the correct index.
 You should assign `currValue` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
+assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
index 216c472b6b7..537171485b7 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
@@ -14,7 +14,7 @@ After your `for` loop has finished, you need to return the array. You should the
 You should `return` the `array`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
index 01a8b817e9a..651272749ff 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
@@ -11,7 +11,7 @@ dashedName: step-3
 
 開發者控制檯將包含你的代碼產生的錯誤，但你也可以使用它來查看代碼中變量的值，這有助於調試。
 
-Add a `console.log("Hello World");` line between your `script` tags. Then click the "Console" button to open the console. You should see the text `Hello World`.
+Add a `console.log("Hello World");` line between your `script` tags. Then click the "Console" button to open the console. You should see the text `"Hello World"`.
 
 請注意該行如何以分號結尾。 JavaScript 中的常見做法是用分號結束代碼行。
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
index 99f2f0c417d..2c3d745f111 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
@@ -10,10 +10,10 @@ dashedName: step-7
 變量可以被<dfn>賦予</dfn>一個值。 當你聲明變量時，這個步驟叫作<dfn>初始化</dfn>。 例如：
 
 ```js
-let camperbot = "Bot";
+let age = 32;
 ```
 
-This would initialize the `camperbot` variable with a value of `Bot`, a string.
+This would initialize the `age` variable with a value of `32`, a number.
 
 Initialize your `xp` variable to have a value of `0`, a number.
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
index 95617a9555b..f819e08a566 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
@@ -15,7 +15,7 @@ let order = ["first", "second", "third"];
 
 This is an array which holds three values. Notice how the values are separated by commas.
 
-Change your `inventory` variable to be an array with the strings `stick`, `dagger`, and `sword`.
+Change your `inventory` variable to be an array with the strings `"stick"`, `"dagger"`, and `"sword"`.
 
 # --hints--
 
@@ -31,19 +31,19 @@ Your `inventory` variable should have three values.
 assert.lengthOf(inventory, 3);
 ```
 
-Your `inventory` variable should include the string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
 ```
 
-Your `inventory` variable should include the string `dagger`.
+Your `inventory` variable should include the string `"dagger"`.
 
 ```js
 assert.include(inventory, "dagger");
 ```
 
-Your `inventory` variable should include the string `sword`.
+Your `inventory` variable should include the string `"sword"`.
 
 ```js
 assert.include(inventory, "sword");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
index ed869621e91..34244e6de0f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-For now, you want the player to start with just the `stick`. Change the `inventory` array to have `stick` as its only value.
+For now, you want the player to start with just the `"stick"`. Change the `inventory` array to have `"stick"` as its only value.
 
 # --hints--
 
@@ -23,7 +23,7 @@ Your `inventory` variable should only have one value.
 assert.lengthOf(inventory, 1);
 ```
 
-Your `inventory` variable should include the string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
index e9c50db84a8..1af49d85c20 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
@@ -33,10 +33,10 @@ You should use `document.querySelector()`.
 assert.match(code, /document\.querySelector/);
 ```
 
-You should use the `#button1` selector.
+You should use the `"#button1"` selector.
 
 ```js
-assert.match(code, /querySelector\(('|")#button1\1\)/);
+assert.match(code, /querySelector\(\s*('|")#button1\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
index 8072e170fdf..4a8ab63b608 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
@@ -9,12 +9,14 @@ dashedName: step-40
 
 `button1` represents your first `button` element. These elements have a special property called `onclick`, which you can use to determine what happens when someone clicks that button.
 
-You can access properties in JavaScript a couple of different ways. The first is with <dfn>dot notation</dfn>. Accessing the `onclick` property of a button would look like:
+You can access properties in JavaScript a couple of different ways. The first is with <dfn>dot notation</dfn>. Here is an example of using dot notation to set the `onclick` property of a button to a function reference.
 
 ```js
-button.onclick
+button.onclick = myFunction;
 ```
 
+In this example, `button` is the button element, and `myFunction` is a reference to a function. When the button is clicked, `myFunction` will be called.
+
 Use dot notation to set the `onclick` property of your `button1` to the function reference of `goStore`. Note that `button1` is already declared, so you don't need to use `let` or `const`.
 
 # --hints--
@@ -31,10 +33,10 @@ You should not use `let` or `const`.
 assert.notMatch(code, /(let|const)\s+button1\.onclick/);
 ```
 
-You should assign the `goStore` function reference to `button1.onclick`.
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button1\.onclick\s*=\s*goStore/);
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
index 3c16cd84022..e05cb141109 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
@@ -13,6 +13,12 @@ Once you have done that, open your console and try clicking the buttons on your
 
 # --hints--
 
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
+
+```js
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
+```
+
 You should use dot notation to access the `onclick` property of `button2`.
 
 ```js
@@ -25,10 +31,10 @@ You should not use `let` or `const` to assign `button2.onclick`.
 assert.notMatch(code, /(let|const)\s+button2\.onclick/);
 ```
 
-You should set the `onclick` property of `button2` to the variable `goCave`.
+You should assign the `goCave` function reference to `button2.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button2\.onclick\s*=\s*goCave/);
+assert.match(code, /button2\.onclick\s*=\s*goCave\s*;?\s*$/m);
 ```
 
 You should use dot notation to access the `onclick` property of `button3`.
@@ -43,10 +49,10 @@ You should not use `let` or `const` to assign `button3.onclick`.
 assert.notMatch(code, /(let|const)\s+button3\.onclick/);
 ```
 
-You should set the `onclick` property of `button3` to the variable `fightDragon`.
+You should assign the `fightDragon` function reference to `button3.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button3\.onclick\s*=\s*fightDragon/);
+assert.match(code, /button3\.onclick\s*=\s*fightDragon\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
index d18317a8b1c..ca9d99d77ca 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-For now, make your `goStore` function output the message `Going to store.` to the console. For example, here is a function that outputs the message `Hello World`.
+For now, make your `goStore` function output the message `"Going to store."` to the console. For example, here is a function that outputs the message `"Hello World"`.
 
 ```js
 function functionName() {
@@ -20,13 +20,13 @@ function functionName() {
 You should have a `console.log("Going to store.");` line in your code. Don't forget the semi-colon.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to store\.\1\);/);
+assert.match(code, /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 Your `console.log("Going to store.");` line should be in your `goStore` function.
 
 ```js
-assert.match(goStore.toString(), /console\.log\(('|")Going to store\.\1\);/);
+assert.match(goStore.toString(), /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
index d3de7428cdc..1e8a5aaa646 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
@@ -7,7 +7,7 @@ dashedName: step-37
 
 # --description--
 
-Now create a `goCave` function that prints `Going to cave.` to the console.
+Now create a `goCave` function that prints `"Going to cave."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(goCave);
 You should have a `console.log("Going to cave.");` line in your code.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 Your `console.log("Going to cave.");` line should be inside your `goCave` function.
 
 ```js
-assert.match(goCave.toString(), /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(goCave.toString(), /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
index dddc6aa1eb5..8c5342a6643 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
@@ -7,7 +7,7 @@ dashedName: step-38
 
 # --description--
 
-Now create a `fightDragon` function that prints `Fighting dragon.` to the console.
+Now create a `fightDragon` function that prints `"Fighting dragon."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(fightDragon);
 You should have a `console.log("Fighting dragon.");` line in your code.
 
 ```js
-assert.match(code, /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 Your `console.log("Fighting dragon.");` line should be inside your `fightDragon` function.
 
 ```js
-assert.match(fightDragon.toString(), /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(fightDragon.toString(), /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
index 7dfe160e468..3d5cba8dd13 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
@@ -9,21 +9,25 @@ dashedName: step-42
 
 The `innerText` property controls the text that appears in an HTML element. 例如：
 
-```js
-const info = document.querySelector("#info");
-info.innerText = "Hello World";
+```html
+<p id="info">Demo content</p> 
 ```
 
-This code would change the element assigned to the `info` variable to have the text `Hello World`.
+```js
+const info = document.querySelector("#info"); 
+info.innerText = "Hello World"; 
+```
 
-When a player clicks your `Go to store` button, you want to change the buttons and text. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `Buy 10 health (10 gold)`.
+The following example would change the text of the `p` element from `Demo content` to `Hello World`.
+
+When a player clicks your `Go to store` button, you want to change the buttons and text. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `"Buy 10 health (10 gold)"`.
 
 # --hints--
 
 You should not have a `console.log("Going to store.");` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(('|")Going to store\.\1\)/);
+assert.notMatch(code, /console\.log\(\s*('|")Going to store\.\1\s*\)/);
 ```
 
 You should use dot notation to access the `innerText` property of `button1`.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
index 7f064499392..348ddb37960 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, add a line that updates the text of `button2` to say `Buy weapon (30 gold)` and update the text of `button3` to say `Go to town square`.
+Now, add a line that updates the text of `button2` to say `"Buy weapon (30 gold)"` and update the text of `button3` to say `"Go to town square"`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button2\.innerText/);
 ```
 
-You should update the `innerText` property of `button2` to be `Buy weapon (30 gold)`.
+You should update the `innerText` property of `button2` to be `"Buy weapon (30 gold)"`.
 
 ```js
 assert.match(code, /button2\.innerText\s*=\s*('|")Buy weapon \(30 gold\)\1/);
@@ -47,7 +47,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button3\.innerText/);
 ```
 
-You should update the `innerText` property of `button3` to be `Go to town square`.
+You should update the `innerText` property of `button3` to be `"Go to town square"`.
 
 ```js
 assert.match(code, /button3\.innerText\s*=\s*('|")Go to town square\1/);
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
index 2cda9586c20..40c44d48157 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Now you need to modify your display text. Change the `innerText` property of the `text` to be `You enter the store.`.
+Now you need to modify your display text. Change the `innerText` property of the `text` to be `"You enter the store."`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `text`
 assert.notMatch(code, /(let|const)\s+text\.innerText/);
 ```
 
-You should update the `innerText` property of `text` to be `You enter the store.`.
+You should update the `innerText` property of `text` to be `"You enter the store."`.
 
 ```js
 assert.match(code, /text\.innerText\s*=\s*('|")You enter the store.\1/);
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
index d41f8f34637..96f21319424 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
@@ -7,25 +7,25 @@ dashedName: step-48
 
 # --description--
 
-In your `goTown` function, change your `button` elements' `innerText` properties to be `Go to store`, `Go to cave`, and `Fight dragon`. Update your `onclick` properties to be `goStore`, `goCave`, and `fightDragon`, respectively.
+In your `goTown` function, change your `button` elements' `innerText` properties to be `"Go to store"`, `"Go to cave"`, and `"Fight dragon"`. Update your `onclick` properties to be `goStore`, `goCave`, and `fightDragon`, respectively.
 
-Finally, update `innerText` property of your `text` to be `You are in the town square. You see a sign that says Store.`.
+Finally, update `innerText` property of your `text` to be `"You are in the town square. You see a sign that says Store."`.
 
 # --hints--
 
-You should set the `button1.innerText` property to be `Go to store` in your `goTown` function.
+You should set the `button1.innerText` property to be `"Go to store"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-You should set the `button2.innerText` property to be `Go to cave` in your `goTown` function.
+You should set the `button2.innerText` property to be `"Go to cave"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-You should set the `button3.innerText` property to be `Fight dragon` in your `goTown` function.
+You should set the `button3.innerText` property to be `"Fight dragon"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -49,7 +49,7 @@ You should set the `button3.onclick` property to be `fightDragon` in your `goTow
 assert.match(goTown.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-You should set the `text.innerText` property to be `You are in the town square. You see a sign that says Store.` in your `goTown` function.
+You should set the `text.innerText` property to be `"You are in the town square. You see a sign that says Store."` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /text\.innerText\s*=\s*('|")You are in the town square. You see a sign that says Store\.\1/);
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
index 3d9e1979d4c..2d820e93339 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
@@ -28,7 +28,7 @@ assert.match(code, /function\s+update/);
 Your `update` function should take a parameter called `location`.
 
 ```js
-assert.match(update.toString(), /update\(location\)/);
+assert.match(update.toString(), /update\(\s*location\s*\)/);
 ```
 
 Your `update` function should be empty.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
index bf36092b3fb..23ce6658504 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. For example, here is an object with a key of `name` set to `Quincy Larson`.
+Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. For example, here is an object with a key of `name` set to `"Quincy Larson"`.
 
 ```js
 {
@@ -15,7 +15,7 @@ Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is t
 }
 ```
 
-Add a `name` property to your empty object and give it a value of `town square`.
+Add a `name` property to your empty object and give it a value of `"town square"`.
 
 # --hints--
 
@@ -31,7 +31,7 @@ Your first value of `locations` should have a `name` property.
 assert.isDefined(locations[0].name);
 ```
 
-Your first value of `locations` should have a `name` property with a value of `town square`.
+Your first value of `locations` should have a `name` property with a value of `"town square"`.
 
 ```js
 assert.equal(locations[0].name, "town square");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
index 085b96712a5..7324813f580 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
@@ -25,19 +25,19 @@ assert.isString(locations[0]["button text"][1]);
 assert.isString(locations[0]["button text"][2]);
 ```
 
-The first value in the `button text` array should be "Go to store".
+The first value in the `button text` array should be `"Go to store"`.
 
 ```js
 assert.equal(locations[0]["button text"][0], "Go to store");
 ```
 
-The second value in the `button text` array should be "Go to cave".
+The second value in the `button text` array should be `"Go to cave"`.
 
 ```js
 assert.equal(locations[0]["button text"][1], "Go to cave");
 ```
 
-The third value in the `button text` array should be "Fight dragon".
+The third value in the `button text` array should be `"Fight dragon"`.
 
 ```js
 assert.equal(locations[0]["button text"][2], "Fight dragon");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
index 2af226e25b4..4f902b7a390 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
@@ -23,7 +23,7 @@ Your `text` property should be a string.
 assert.isString(locations[0]["text"]);
 ```
 
-Your `text` property should have the value `You are in the town square. You see a sign that says \"Store\".`
+Your `text` property should have the value `"You are in the town square. You see a sign that says \"Store\"."`
 
 ```js
 assert.equal(locations[0]["text"], "You are in the town square. You see a sign that says \"Store\".");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
index 88eeea33b12..2e50a262b7c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
@@ -37,7 +37,7 @@ Your second `locations` object should have a `button text` property which is an
 assert.isArray(locations[1]["button text"]);
 ```
 
-Your `button text` property should have the string values `Buy 10 health (10 gold)`, `Buy weapon (30 gold)`, and `Go to town square`.
+Your `button text` property should have the string values `"Buy 10 health (10 gold)"`, `"Buy weapon (30 gold)"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[1]["button text"][0], "Buy 10 health (10 gold)");
@@ -65,7 +65,7 @@ Your second `locations` object should have a `text` property which is a string.
 assert.isString(locations[1].text);
 ```
 
-Your second `locations` object should have a `text` property with the value of `You enter the store.`.
+Your second `locations` object should have a `text` property with the value of `"You enter the store."`.
 
 ```js
 assert.equal(locations[1].text, "You enter the store.");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
index 205d3984c1a..e85324753e0 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
@@ -11,19 +11,19 @@ Now you can consolidate some of your code. Start by copying the code from inside
 
 # --hints--
 
-Your `update` function should set `button1.innerText` to `Go to store`.
+Your `update` function should set `button1.innerText` to `"Go to store"`.
 
 ```js
 assert.match(update.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-Your `update` function should set `button2.innerText` to `Go to cave`.
+Your `update` function should set `button2.innerText` to `"Go to cave"`.
 
 ```js
 assert.match(update.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-Your `update` function should set `button3.innerText` to `Fight dragon`.
+Your `update` function should set `button3.innerText` to `"Fight dragon"`.
 
 ```js
 assert.match(update.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -47,7 +47,7 @@ Your `update` function should set `button3.onclick` to `fightDragon`.
 assert.match(update.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-Your `update` function should set `text.innerText` to `You are in the town square. You see a sign that says \"Store\".`.
+Your `update` function should set `text.innerText` to `"You are in the town square. You see a sign that says \"Store\"."`.
 
 ```js
 assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town square. You see a sign that says \\"Store\\"\."/);
@@ -56,13 +56,13 @@ assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town squa
 Your `goTown` function should be empty.
 
 ```js
-assert.match(goTown.toString(), /function goTown\(\) \{\}/);
+assert.match(goTown.toString(), /function goTown\(\s*\) \{\}/);
 ```
 
 Your `goStore` function should be empty.
 
 ```js
-assert.match(goStore.toString(), /function goStore\(\) \{\}/);
+assert.match(goStore.toString(), /function goStore\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
index 6ee54b7b692..88987c3a9ee 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
@@ -20,13 +20,13 @@ myFunction();
 You should call the `update` function in the `goTown` function.
 
 ```js
-assert.match(goTown.toString(), /update\(\)/);
+assert.match(goTown.toString(), /update\(\s*\)/);
 ```
 
 Don't forget your ending semi-colon.
 
 ```js
-assert.match(goTown.toString(), /update\(\);/);
+assert.match(goTown.toString(), /update\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
index 1ce5373272a..c037cb0725f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
@@ -20,7 +20,7 @@ Pass your `locations` array into the `update` call.
 You should pass the `locations` array into the `update` call.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
index 9e9c0314ac3..8f37b1ec32e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
@@ -7,7 +7,7 @@ dashedName: step-62
 
 # --description--
 
-The `locations` array contains two locations: the `town square` and the `store`. Currently you are passing that entire array into the `update` function.
+The `locations` array contains two locations: the `"town square"` and the `"store"`. Currently you are passing that entire array into the `update` function.
 
 Pass in only the first element of the `locations` array by adding `[0]` at the end of the variable. For example: `myFunction(arg[0]);`.
 
@@ -18,25 +18,25 @@ This is called <dfn>bracket notation</dfn>. Values in an array are accessed by i
 You should use bracket notation with `locations`.
 
 ```js
-assert.match(code, /locations\[/);
+assert.match(code, /locations\s*\[/);
 ```
 
 You should access the first object in the `locations` array. Remember that arrays are zero-based.
 
 ```js
-assert.match(code, /locations\[0\]/);
+assert.match(code, /locations\s*\[\s*0\s*\]/);
 ```
 
 You should pass the first object in the `locations` array into the `update` function.
 
 ```js
-assert.match(code, /update\(locations\[0\]\);/);
+assert.match(code, /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 This call should still be in your `goTown()` function.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\[0\]\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
index c52ffdbaca5..3e5d59cbd0d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
@@ -9,20 +9,20 @@ dashedName: step-63
 
 Now your `update` function needs to use the argument you pass into it.
 
-Inside the `update` function, change the value of the `button1.innerText` assignment to be `location["button text"]`. That way, you use bracket notation to get the `button text` property of the `location` object passed into the function.
+Inside the `update` function, change the value of the `button1.innerText` assignment to be `location["button text"]`. That way, you use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 # --hints--
 
-Your `update` function should use bracket notation to get the `button text` property of the `location` object passed into the function.
+Your `update` function should use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 ```js
 assert.match(update.toString(), /location[('|")button text\1]/);
 ```
 
-You should assign the value of the `button text` property of the `location` object to the `innerText` property of `button1`.
+You should assign the value of the `"button text"` property of the `location` object to the `innerText` property of `button1`.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
index 12f66c47fdc..599ec35b690 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
@@ -7,20 +7,20 @@ dashedName: step-64
 
 # --description--
 
-`location["button text"]` is an array with three elements. Change the `button1.innerText` assignment to be the first element of that array instead.
+`location["button text"]` is an array with three elements. Change the `button1.innerText` assignment to be `location["button text"][0]` which represents the first element of the array.
 
 # --hints--
 
-You should access the first element of the `button text` property of the `location` parameter.
+You should access the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.innerText` property to be the first element of the `button text` property of the `location` parameter.
+You should set the `button1.innerText` property to be the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
index 1ffbe1adf8a..955646516f6 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
@@ -7,32 +7,32 @@ dashedName: step-65
 
 # --description--
 
-Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `button text` array, respectively.
+Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `"button text"` array, respectively.
 
 # --hints--
 
-You should access the second element of the `button text` property of the `location` parameter.
+You should access the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.innerText` property to be the second element of the `button text` property of the `location` parameter.
+You should set the `button2.innerText` property to be the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.innerText\s*=\s*location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /button2\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button text` property of the `location` parameter.
+You should access the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.innerText` property to be the third element of the `button text` property of the `location` parameter.
+You should set the `button3.innerText` property to be the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.innerText\s*=\s*location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /button3\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
index 596dfe9464e..0027fe18399 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
@@ -7,44 +7,44 @@ dashedName: step-66
 
 # --description--
 
-Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `button functions` array.
+Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `"button functions"` array.
 
 # --hints--
 
-You should access the first element of the `button functions` property of the `location` parameter.
+You should access the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.onclick` property to be the first element of the `button functions` property of the `location` parameter.
+You should set the `button1.onclick` property to be the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.onclick\s*=\s*location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /button1\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should access the second element of the `button functions` property of the `location` parameter.
+You should access the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.onclick` property to be the second element of the `button functions` property of the `location` parameter.
+You should set the `button2.onclick` property to be the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.onclick\s*=\s*location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /button2\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button functions` property of the `location` parameter.
+You should access the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.onclick` property to be the third element of the `button functions` property of the `location` parameter.
+You should set the `button3.onclick` property to be the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.onclick\s*=\s*location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /button3\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
index c2a5d71de33..15ea03a4ac8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
@@ -22,7 +22,7 @@ assert.match(goStore.toString(), /update\(/);
 Your `goStore` function should pass the second element of the `locations` array as your argument to `update()`.
 
 ```js
-assert.match(goStore.toString(), /update\(locations\[1\]\)/);
+assert.match(goStore.toString(), /update\(\s*locations\s*\[\s*1\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
index c9126c4eaf8..82f1d1ac32f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
@@ -26,13 +26,13 @@ assert.isFunction(fightBeast);
 `fightSlime` should be empty.
 
 ```js
-assert.match(fightSlime.toString(), /function fightSlime\(\) \{\}/);
+assert.match(fightSlime.toString(), /function fightSlime\(\s*\) \{\}/);
 ```
 
 `fightBeast` should be empty.
 
 ```js
-assert.match(fightBeast.toString(), /function fightBeast\(\) \{\}/);
+assert.match(fightBeast.toString(), /function fightBeast\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
index 6549539866e..cfa3ff16d5a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
@@ -9,14 +9,13 @@ dashedName: step-70
 
 Add a third object to the `locations` array. Give it the same properties as the other two objects.
 
-Set `name` to `cave`. Set `button text` to an array with the strings `Fight slime`, `Fight fanged beast`, and `Go to town square`. Set the `button functions` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `You enter the cave. You see some monsters.`.
+Set `name` to `cave`. Set `button text` to an array with the strings `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`. Set the `"button functions"` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `"You enter the cave. You see some monsters."`.
 
 # --hints--
 
 You should have three values in your `locations` array.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 3);
 ```
 
@@ -26,19 +25,19 @@ Your third `locations` value should be an object.
 assert.isObject(locations[2]);
 ```
 
-Your third `locations` object should have a `name` property with the value of `cave`.
+Your third `locations` object should have a `name` property with the value of `"cave"`.
 
 ```js
 assert.equal(locations[2].name, "cave");
 ```
 
-Your third `locations` object should have a `button text` property which is an array.
+Your third `locations` object should have a `"button text"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button text"]);
 ```
 
-Your `button text` property should have the string values `Fight slime`, `Fight fanged beast`, and `Go to town square`.
+Your `"button text"` property should have the string values `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[2]["button text"][0], "Fight slime");
@@ -46,13 +45,13 @@ assert.equal(locations[2]["button text"][1], "Fight fanged beast");
 assert.equal(locations[2]["button text"][2], "Go to town square");
 ```
 
-Your third `locations` object should have a `button functions` property which is an array.
+Your third `locations` object should have a `"button functions"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button functions"]);
 ```
 
-Your `button functions` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
+Your `"button functions"` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
 
 ```js
 assert.equal(locations[2]["button functions"][0], fightSlime);
@@ -66,7 +65,7 @@ Your third `locations` object should have a `text` property which is a string.
 assert.isString(locations[2].text);
 ```
 
-Your third `locations` object should have a `text` property with the value of `You enter the cave. You see some monsters.`.
+Your third `locations` object should have a `text` property with the value of `"You enter the cave. You see some monsters."`.
 
 ```js
 assert.equal(locations[2].text, "You enter the cave. You see some monsters.");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
index 255dddba4a5..9773ab789c5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
@@ -7,7 +7,7 @@ dashedName: step-71
 
 # --description--
 
-Now that you have a `cave` location object, update your `goCave` function to call `update` and pass that new `cave` location. Remember that this is the third element in your `locations` array.
+Now that you have a `"cave"` location object, update your `goCave` function to call `update` and pass that new `"cave"` location. Remember that this is the third element in your `locations` array.
 
 Don't forget to remove your `console.log` call!
 
@@ -16,19 +16,19 @@ Don't forget to remove your `console.log` call!
 You should use bracket notation to access the third element in your `locations` array.
 
 ```js
-assert.match(code, /locations\[2\]/);
+assert.match(code, /locations\s*\[\s*2\s*\]/);
 ```
 
 You should pass the third element in your `locations` array to `update`.
 
 ```js
-assert.match(code, /update\(locations\[2\]\)/);
+assert.match(code, /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 You should call `update` with the third element in your `locations` array in your `goCave` function.
 
 ```js
-assert.match(goCave.toString(), /update\(locations\[2\]\)/);
+assert.match(goCave.toString(), /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 You should not have the `console.log` statement in your `goCave` function.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
index 69f2370677d..96907e1de02 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
@@ -7,7 +7,7 @@ dashedName: step-72
 
 # --description--
 
-Now that your `store` and `cave` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
+Now that your `"store"` and `"cave"` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
 
 For example, here is how you would set `num` equal to `5` less than `num`: `num = num - 5;`.
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
index c480a5b4123..e556dc1ab51 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
@@ -19,7 +19,7 @@ const total = document.querySelector('#total');
 total.innerText = value;
 ```
 
-You can test this by clicking your "Go to store" button, followed by your "Buy Health" button.
+You can test this by clicking your `"Go to store"` button, followed by your `"Buy Health"` button.
 
 **Note:** Your answer should only be two lines of code.
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
index f256c5729db..04b65a97082 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
@@ -7,17 +7,20 @@ dashedName: step-76
 
 # --description--
 
-What if the player doesn't have enough gold to buy health? When you want to run code conditionally, you can use the `if` statement. Put all of the code in your `buyHealth` function inside an `if` statement. 例如：
+What if the player doesn't have enough gold to buy health? When you want to run code conditionally, you can use the <dfn>if</dfn> statement.
+
+An `if` statement is used to make decisions in code. The keyword `if` is followed by a condition in parentheses. If the condition is true, the code inside the curly braces `{}` is executed. If the condition is false, the code inside the curly braces is skipped.
+
+Here is an example of an `if` statement:
 
 ```js
-function myFunction() {
-  if ("condition") {
-    console.log("Hello World!");
-  }
+const num = 5;
+if (num >= 3) {
+  console.log("This code will run because num is greater than or equal to 3.");
 }
 ```
 
-For now, the `if` statement condition should be set to the string `condition` as a placeholder.
+Start by placing all of the code in your `buyHealth` function inside an `if` statement. For the `if` statement condition, check if `gold` is greater than or equal to `10`.
 
 # --hints--
 
@@ -27,16 +30,16 @@ Your `buyHealth` function should have an `if` statement.
 assert.match(buyHealth.toString(), /if/);
 ```
 
-Your `if` statement should have the string `condition` for the condition.
+Your `if` statement should check if `gold` is greater than or equal to `10`.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)/);
 ```
 
 All of your `buyHealth` code should be inside the `if` statement.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)\s*\{[\s\S]*\}/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)\s*{\s*gold\s*-=\s*10;\s*health\s*\+=\s*10;\s*goldText\.innerText\s*=\s*gold;\s*healthText\.innerText\s*=\s*health;\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
index 98221e2b007..051ddd2f2d7 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c5db7888af27af23f0dd
-title: 步驟 78
+title: Step 77
 challengeType: 0
-dashedName: step-78
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
index 0aff158f34a..1498e6c09c4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8c65b75664c28a8e59c16
-title: 步驟 79
+title: Step 78
 challengeType: 0
-dashedName: step-79
+dashedName: step-78
 ---
 
 # --description--
 
-Inside the `else` statement, set `text.innerText` to equal `You do not have enough gold to buy health.`.
+Inside the `else` statement, set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 # --hints--
 
-Your `buyHealth` function should set `text.innerText` to equal `You do not have enough gold to buy health.`.
+Your `buyHealth` function should set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 ```js
 assert.match(buyHealth.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy health\.\1/);
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
index e57d970bfdb..f38b4906897 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c6815f5f1a29735efe1b
-title: 步驟 80
+title: Step 79
 challengeType: 0
-dashedName: step-80
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
index 5ad73ee67c0..b2dc007106e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c7322e42962ad53ad204
-title: 第 81 步
+title: Step 80
 challengeType: 0
-dashedName: step-81
+dashedName: step-80
 ---
 
 # --description--
 
-Just like your `locations` array, your `weapons` array will hold objects. Add four objects to the `weapons` array, each with two properties: `name` and `power`. The first should have the `name` set to `stick` and the `power` set to `5`. The second should be `dagger` and `30`. The third, `claw hammer` and `50`. The fourth, `sword` and `100`.
+Just like your `locations` array, your `weapons` array will hold objects. Add four objects to the `weapons` array, each with two properties: `name` and `power`. The first should have the `name` set to `"stick"` and the `power` set to `5`. The second should be `"dagger"` and `30`. The third, `"claw hammer"` and `50`. The fourth, `"sword"` and `100`.
 
 # --hints--
 
@@ -26,28 +26,28 @@ assert.isObject(weapons[2]);
 assert.isObject(weapons[3]);
 ```
 
-Your first `weapons` object should have the `name` set to `stick` and the `power` set to `5`.
+Your first `weapons` object should have the `name` set to `"stick"` and the `power` set to `5`.
 
 ```js
 assert.equal(weapons[0].name, 'stick');
 assert.equal(weapons[0].power, 5);
 ```
 
-Your second `weapons` object should have the `name` set to `dagger` and the `power` set to `30`.
+Your second `weapons` object should have the `name` set to `"dagger"` and the `power` set to `30`.
 
 ```js
 assert.equal(weapons[1].name, 'dagger');
 assert.equal(weapons[1].power, 30);
 ```
 
-Your third `weapons` object should have the `name` set to `claw hammer` and the `power` set to `50`.
+Your third `weapons` object should have the `name` set to `"claw hammer"` and the `power` set to `50`.
 
 ```js
 assert.equal(weapons[2].name, 'claw hammer');
 assert.equal(weapons[2].power, 50);
 ```
 
-Your fourth `weapons` object should have the `name` set to `sword` and the `power` set to `100`.
+Your fourth `weapons` object should have the `name` set to `"sword"` and the `power` set to `100`.
 
 ```js
 assert.equal(weapons[3].name, 'sword');
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
index 838f50a7ef4..dd8e2a5d9ec 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c7a59e72c02bb1c717d2
-title: 步驟 82
+title: Step 81
 challengeType: 0
-dashedName: step-82
+dashedName: step-81
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.include(buyWeapon.toString(), 'if');
 Your `if` statement should check if `gold` is greater than or equal to `30`.
 
 ```js
-assert.match(buyWeapon.toString(), /if\s*\(gold\s*>=\s*30\)/);
+assert.match(buyWeapon.toString(), /if\s*\(\s*gold\s*>=\s*30\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
index 6f56f8dda34..570844fee8c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c89e4272512d44fc1c66
-title: 步驟 83
+title: Step 82
 challengeType: 0
-dashedName: step-83
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
index 7c6a26cda42..f7e010232a8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c8cee8e5cf2e001789b4
-title: 步驟 84
+title: Step 83
 challengeType: 0
-dashedName: step-84
+dashedName: step-83
 ---
 
 # --description--
 
-The value of the `currentWeapon` variable corresponds to an index in the `weapons` array. The player starts with a `stick`, since `currentWeapon` starts at `0` and `weapons[0]` is the `stick` weapon.
+The value of the `currentWeapon` variable corresponds to an index in the `weapons` array. The player starts with a `"stick"`, since `currentWeapon` starts at `0` and `weapons[0]` is the `"stick"` weapon.
 
 In the `buyWeapon` function, use compound assignment to add `1` to `currentWeapon` - the user is buying the next weapon in the `weapons` array.
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
index 51b705818c4..c2b63fbfcee 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ca22d29fe62f3952bdf5
-title: 步驟 85
+title: Step 84
 challengeType: 0
-dashedName: step-85
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
index 71c59414821..8ebcf334d01 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8cb19bd7f8a304e5427a1
-title: 步驟 86
+title: Step 85
 challengeType: 0
-dashedName: step-86
+dashedName: step-85
 ---
 
 # --description--
 
-Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `You now have a new weapon.`.
+Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `"You now have a new weapon."`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should update the `innerText` property of the `goldText` element to be `gold
 assert.match(buyWeapon.toString(), /goldText\.innerText\s*=\s*gold/);
 ```
 
-You should update the `innerText` property of the `text` element to be `You now have a new weapon.`.
+You should update the `innerText` property of the `text` element to be `"You now have a new weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a new weapon\.\1/);
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
index 4fd7fab4ab7..81ebba26eab 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cbd1e3595431d5a2b3f1
-title: 步驟 87
+title: Step 86
 challengeType: 0
-dashedName: step-87
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
index b49f5dd4635..a55298fd7e8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cce1b0c32c33017cf2e9
-title: 步驟 88
+title: Step 87
 challengeType: 0
-dashedName: step-88
+dashedName: step-87
 ---
 
 # --description--
@@ -22,7 +22,7 @@ let value = array[index];
 You should update `newWeapon` to have the value of `weapons[currentWeapon]`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
index 09c5a39bc68..af0ce0a447a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ce1dfc990134162b3bd9
-title: 步驟 89
+title: Step 88
 challengeType: 0
-dashedName: step-89
+dashedName: step-88
 ---
 
 # --description--
@@ -14,7 +14,7 @@ dashedName: step-89
 You should update `newWeapon` to have the value of `weapons[currentWeapon].name`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]\.name;/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
index d4b1f294afe..a06ea68706d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8ce73d0dce43468f6689c
-title: 步驟 90
+title: Step 89
 challengeType: 0
-dashedName: step-90
+dashedName: step-89
 ---
 
 # --description--
 
-You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `You now have a new weapon.` string to say `You now have a` and the name of the new weapon. Remember to end the sentence with a period.
+You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `"You now have a new weapon."` string to say `"You now have a "` and the name of the new weapon. Remember to end the sentence with a period.
 
-Here is an example that creates the string `Hello, our name is freeCodeCamp.`:
+Here is an example that creates the string `"Hello, our name is freeCodeCamp."`:
 
 ```js
 const ourName = "freeCodeCamp";
@@ -18,7 +18,7 @@ const ourStr = "Hello, our name is " + ourName + ".";
 
 # --hints--
 
-You should update the `text.innerText` assignment to start with the string `You now have a`.
+You should update the `text.innerText` assignment to start with the string `"You now have a "`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a \1/);
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
index 05bd34c49a9..4f2ed89e0ac 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cf22272d6d35af80d4ac
-title: 步驟 91
+title: Step 90
 challengeType: 0
-dashedName: step-91
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
index 1e8135d1e77..fddaa343d3b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d0337d7c67377a4a76c6
-title: 步驟 92
+title: Step 91
 challengeType: 0
-dashedName: step-92
+dashedName: step-91
 ---
 
 # --description--
 
 Up until now, any time `text.innerText` was updated, the old text was erased. This time, use the `+=` operator to add text to the end of `text.innerText`.
 
-Add the string `In your inventory you have:` - include the spaces at the beginning and the end.
+Add the string `" In your inventory you have: "` - include the spaces at the beginning and the end.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should use the `+=` operator to add to `text.innerText`.
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*/)
 ```
 
-You should add the string `In your inventory you have:` to the end of `text.innerText`. Mind the spaces!
+You should add the string `" In your inventory you have: "` to the end of `text.innerText`. Mind the spaces!
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
index 31964651145..d2d697233c5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d08668fa8b38732486e9
-title: 步驟 93
+title: Step 92
 challengeType: 0
-dashedName: step-93
+dashedName: step-92
 ---
 
 # --description--
@@ -11,7 +11,7 @@ At the end of the second `text.innerText` string you just added, use the concate
 
 # --hints--
 
-You should not change the `In your inventory you have:` string.
+You should not change the `" In your inventory you have: "` string.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
index 13dff0e42d4..08f3472f27d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d0c4f12c2239b6618582
-title: 步驟 94
+title: Step 93
 challengeType: 0
-dashedName: step-94
+dashedName: step-93
 ---
 
 # --description--
 
-Add an `else` statement to your `buyWeapon` function. In that statement, set `text.innerText` to equal `You do not have enough gold to buy a weapon.`.
+Add an `else` statement to your `buyWeapon` function. In that statement, set `text.innerText` to equal `"You do not have enough gold to buy a weapon."`.
 
 # --hints--
 
@@ -24,13 +24,13 @@ const split = buyWeapon.toString().split(/\s|\n/);
 assert.isAbove(split.indexOf('else'), split.indexOf('if'));
 ```
 
-You should set `text.innerText` to `You do not have enough gold to buy a weapon.`.
+You should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy a weapon.\1/);
 ```
 
-Your `else` statement should set `text.innerText` to `You do not have enough gold to buy a weapon.`.
+Your `else` statement should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 gold = 20;
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
index 73db7fed9ca..b8fe5b50826 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d0fdf2dad83a92883a80
-title: 步驟 95
+title: Step 94
 challengeType: 0
-dashedName: step-95
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
index 13f367b92b7..0814d277818 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d143f2a58e3b6d6e9c33
-title: 步驟 96
+title: Step 95
 challengeType: 0
-dashedName: step-96
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
index 455a0d19826..821369edf60 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d1c72e8bb13c2074d93c
-title: 步驟 97
+title: Step 96
 challengeType: 0
-dashedName: step-97
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
index 66cd614c072..5b21812459f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d2146a3e853d0a6e28ca
-title: 步驟 98
+title: Step 97
 challengeType: 0
-dashedName: step-98
+dashedName: step-97
 ---
 
 # --description--
 
-Add an `else` statement for your outer `if` statement. Inside this new `else` statement, set `text.innerText` to `You already have the most powerful weapon!`.
+Add an `else` statement for your outer `if` statement. Inside this new `else` statement, set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 # --hints--
 
@@ -18,13 +18,13 @@ const matches = buyWeapon.toString().match(/else/g);
 assert.equal(matches.length, 2);
 ```
 
-You should set `text.innerText` to `You already have the most powerful weapon!`.
+You should set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 ```js
 assert.match(buyWeapon.toString(), /('|")You already have the most powerful weapon!\1/);
 ```
 
-You should modify your `text.innerText` to `You already have the most powerful weapon!` within your outer `else` statement.
+You should modify your `text.innerText` to `"You already have the most powerful weapon!"` within your outer `else` statement.
 
 ```js
 currentWeapon = 5;
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
index 44b20cf44a1..8adbb83ea32 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d24c97461b3ddb9397c8
-title: 步驟 99
+title: Step 98
 challengeType: 0
-dashedName: step-99
+dashedName: step-98
 ---
 
 # --description--
 
 Once a player has the most powerful weapon, you can give them the ability to sell their old weapons.
 
-In the outer `else` statement, set `button2.innerText` to `Sell weapon for 15 gold`. Also set `button2.onclick` to the function name `sellWeapon`.
+In the outer `else` statement, set `button2.innerText` to `"Sell weapon for 15 gold"`. Also set `button2.onclick` to the function name `sellWeapon`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should set the value of `button2.innerText`.
 assert.match(buyWeapon.toString(), /button2\.innerText/);
 ```
 
-You should set the value of `button2.innerText` to `Sell weapon for 15 gold`.
+You should set the value of `button2.innerText` to `"Sell weapon for 15 gold"`.
 
 ```js
 assert.match(buyWeapon.toString(), /button2\.innerText\s*=\s*('|")Sell weapon for 15 gold\1;/);
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
index 240f434c93e..f239b5e07bb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d2e2a073be3edb46116f
-title: 步驟 100
+title: Step 99
 challengeType: 0
-dashedName: step-100
+dashedName: step-99
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.isFunction(sellWeapon);
 `sellWeapon` should be an empty function.
 
 ```js
-assert.match(sellWeapon.toString(), /sellWeapon\(\)\s*\{\s*\}/);
+assert.match(sellWeapon.toString(), /sellWeapon\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
index 495744d1e6a..3cf081b462d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d31ebbc10e3fe1b28e03
-title: 步驟 101
+title: Step 100
 challengeType: 0
-dashedName: step-101
+dashedName: step-100
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(sellWeapon.toString(), /if/);
 Your `if` statement should check if `inventory.length` is greater than `1`.
 
 ```js
-assert.match(sellWeapon.toString(), /if\s*\(inventory\.length\s*>\s*1\)/);
+assert.match(sellWeapon.toString(), /if\s*\(\s*inventory\.length\s*>\s*1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
index 4256f3a3fe7..e185edbdfe4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d35660db4040ba292193
-title: 步驟 102
+title: Step 101
 challengeType: 0
-dashedName: step-102
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
index 5cd3b5313c0..c9a8d067c6f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d382cd075f4169223e14
-title: 步驟 103
+title: Step 102
 challengeType: 0
-dashedName: step-103
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
index 85027c5058c..e6174703f8c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d539dc11cb42b5dd7ec8
-title: 步驟 104
+title: Step 103
 challengeType: 0
-dashedName: step-104
+dashedName: step-103
 ---
 
 # --description--
@@ -21,19 +21,19 @@ Use the `shift()` method to take the first element from the `inventory` array an
 Your `sellWeapon` function should use the `shift()` method.
 
 ```js
-assert.match(sellWeapon.toString(), /shift\(\)/);
+assert.match(sellWeapon.toString(), /shift\(\s*\)/);
 ```
 
 You should use the `shift()` method on the `inventory` array.
 
 ```js
-assert.match(sellWeapon.toString(), /inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /inventory\.shift\(\s*\)/);
 ```
 
 You should assign the value of `inventory.shift()` to your `currentWeapon` variable.
 
 ```js
-assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
index d1a2f8b3c3a..9b5f9e125ed 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d61ddfe35744369365b7
-title: 步驟 105
+title: Step 104
 challengeType: 0
-dashedName: step-105
+dashedName: step-104
 ---
 
 # --description--
 
-After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `You sold a`, then `currentWeapon`, then the string `.`.
+After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `"You sold a "`, then `currentWeapon`, then the string `"."`.
 
 # --hints--
 
@@ -17,19 +17,19 @@ You should use the assignment operator with `text.innerText`.
 assert.match(sellWeapon.toString(), /text\.innerText\s*=/);
 ```
 
-You should add `You sold a` to `text.innerText`. Spacing is important.
+You should add `"You sold a "` to `text.innerText`. Spacing is important.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1/);
 ```
 
-You should add the value of `currentWeapon` to the `You sold a` string. Use the concatenation operator to do this on the same line.
+You should add the value of `currentWeapon` to the `"You sold a "` string. Use the concatenation operator to do this on the same line.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a\s\1\s*\+\s*\_currentWeapon/);
 ```
 
-You should add the string `.` to the value of `currentWeapon`. Use the concatenation operator to do this on the same line.
+You should add the string `"."` to the value of `currentWeapon`. Use the concatenation operator to do this on the same line.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1\s*\+\s*\_currentWeapon\s+\+\s+('|")\.\2/);
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
index a8b17eb4c54..59c6c536b8b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d6c7001ebc45350e3d16
-title: 步驟 106
+title: Step 105
 challengeType: 0
-dashedName: step-106
+dashedName: step-105
 ---
 
 # --description--
 
-Now use the `+=` operator to add the string `In your inventory you have:` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `In your inventory you have:` string.
+Now use the `+=` operator to add the string `" In your inventory you have: "` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `" In your inventory you have: "` string.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const matches = sellWeapon.toString().match(/text\.innerText\s*\+=/g);
 assert.equal(matches.length, 1);
 ```
 
-You should add the string `In your inventory you have:` to the second `text.innerText` line. Spacing matters.
+You should add the string `" In your inventory you have: "` to the second `text.innerText` line. Spacing matters.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*\+=\s*('|") In your inventory you have: \1/);
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
index 3de2f2564d1..c7dfa1f9628 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d7b8ab568b4649998954
-title: 步驟 107
+title: Step 106
 challengeType: 0
-dashedName: step-107
+dashedName: step-106
 ---
 
 # --description--
 
-Use an `else` statement to run when the `inventory` length is not more than one. Set the `text.innerText` to say `Don't sell your only weapon!`.
+Use an `else` statement to run when the `inventory` length is not more than one. Set the `text.innerText` to say `"Don't sell your only weapon!"`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ Your `sellWeapon` function should have an `else` statement.
 assert.match(sellWeapon.toString(), /else/);
 ```
 
-You should set `text.innerText` to `Don't sell your only weapon!`.
+You should set `text.innerText` to `"Don't sell your only weapon!"`.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")Don't sell your only weapon!\1/);
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
index 21824450488..a8068715efb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d81f539f004776dd9b1e
-title: 步驟 108
+title: Step 107
 challengeType: 0
-dashedName: step-108
+dashedName: step-107
 ---
 
 # --description--
 
 Now you can start the code to fight monsters. To keep your code organized, your `fightDragon` function has been moved for you to be near the other `fight` functions.
 
-Below your `weapons` array, define a `monsters` variable and assign it an array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. The first object's values should be `slime`, `2`, and `15`, in order. The second should be `fanged beast`, `8`, and `60`. The third should be `dragon`, `20`, and `300`.
+Below your `weapons` array, define a `monsters` variable and assign it an array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. The first object's values should be `"slime"`, `2`, and `15`, in order. The second should be `"fanged beast"`, `8`, and `60`. The third should be `"dragon"`, `20`, and `300`.
 
 # --hints--
 
@@ -37,7 +37,7 @@ Your `monsters` array should have 3 objects.
 assert(monsters.every(val => typeof val === "object"));
 ```
 
-The first value in your `monsters` array should be an object with a `name` property set to `slime`.
+The first value in your `monsters` array should be an object with a `name` property set to `"slime"`.
 
 ```js
 assert.equal(monsters[0].name, "slime");
@@ -55,7 +55,7 @@ The first value in your `monsters` array should be an object with a `health` pro
 assert.equal(monsters[0].health, 15);
 ```
 
-The second value in your `monsters` array should be an object with a `name` property set to `fanged beast`.
+The second value in your `monsters` array should be an object with a `name` property set to `"fanged beast"`.
 
 ```js
 assert.equal(monsters[1].name, "fanged beast");
@@ -73,7 +73,7 @@ The second value in your `monsters` array should be an object with a `health` pr
 assert.equal(monsters[1].health, 60);
 ```
 
-The third value in your `monsters` array should be an object with a `name` property set to `dragon`.
+The third value in your `monsters` array should be an object with a `name` property set to `"dragon"`.
 
 ```js
 assert.equal(monsters[2].name, "dragon");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
index 8284fb09770..f21aeb538fa 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd468debb449b4454086
-title: 步驟 109
+title: Step 108
 challengeType: 0
-dashedName: step-109
+dashedName: step-108
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
index 51ef5280caa..ca2db4faf54 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd9cdb16324b04cfd958
-title: 步驟 110
+title: Step 109
 challengeType: 0
-dashedName: step-110
+dashedName: step-109
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.notMatch(fightSlime.toString(), /let|const/);
 You should call the `goFight` function.
 
 ```js
-assert.match(fightSlime.toString(), /goFight\(\);/);
+assert.match(fightSlime.toString(), /goFight\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
index 6e10d6c35c4..dff775b563a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8dfcf7fb1044d2f478fd1
-title: 步驟 111
+title: Step 110
 challengeType: 0
-dashedName: step-111
+dashedName: step-110
 ---
 
 # --description--
 
-Following the same pattern, use that code in the `fightBeast` and `fightDragon` functions. Remember that `beast` is at index `1` and `dragon` is at index `2`. Also, remove the `console.log` call from your `fightDragon` function.
+Following the same pattern as the `fightSlime` function, use that code in the `fightBeast` and `fightDragon` functions. Remember that `beast` is at index `1` and `dragon` is at index `2`. Also, remove the `console.log` call from your `fightDragon` function.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
index 41d4a23389f..fa62f97c4f9 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e0d1d0110b4ec421489f
-title: 步驟 112
+title: Step 111
 challengeType: 0
-dashedName: step-112
+dashedName: step-111
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
index 79ae29e2799..9ff3ee038cb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
@@ -1,20 +1,19 @@
 ---
 id: 62a8e142f7f0bd4fed898de3
-title: 步驟 113
+title: Step 112
 challengeType: 0
-dashedName: step-113
+dashedName: step-112
 ---
 
 # --description--
 
-Add a new object to the end of the `locations` array, following the same properties as the rest of the objects. Set `name` to `fight`, `button text` to an array with `Attack`, `Dodge`, and `Run`, `button functions` to an array with `attack`, `dodge`, and `goTown`, and `text` to `You are fighting a monster.`.
+Add a new object to the end of the `locations` array, following the same properties as the rest of the objects. Set `name` to `"fight"`, `"button text"` to an array with `"Attack"`, `"Dodge"`, and `"Run"`, `"button functions"` to an array with `attack`, `dodge`, and `goTown`, and `text` to `"You are fighting a monster."`.
 
 # --hints--
 
 Your `locations` array should have 4 values in it.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 4);
 ```
 
@@ -24,25 +23,25 @@ Your new value should be an object.
 assert.isObject(locations[3]);
 ```
 
-Your new object should have a `name` property set to `fight`.
+Your new object should have a `name` property set to `"fight"`.
 
 ```js
 assert.equal(locations[3].name, "fight");
 ```
 
-Your new object should have a `button text` property set to an array with the strings `Attack`, `Dodge`, and `Run`.
+Your new object should have a `"button text"` property set to an array with the strings `"Attack"`, `"Dodge"`, and `"Run"`.
 
 ```js
 assert.deepEqual(locations[3]["button text"], ["Attack", "Dodge", "Run"]);
 ```
 
-Your new object should have a `button functions` property set to an array with the variables `attack`, `dodge`, and `goTown`.
+Your new object should have a `"button functions"` property set to an array with the variables `attack`, `dodge`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[3]["button functions"], [attack, dodge, goTown]);
 ```
 
-Your new object should have a `text` property set to `You are fighting a monster.`.
+Your new object should have a `text` property set to `"You are fighting a monster."`.
 
 ```js
 assert.equal(locations[3].text, "You are fighting a monster.");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
index 84cb48f11b6..1a6b6592b70 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e1dc897df55108bcb5e8
-title: 步驟 114
+title: Step 113
 challengeType: 0
-dashedName: step-114
+dashedName: step-113
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(goFight.toString(), /update/);
 You should pass the fourth object in your `locations` array to your `update` call.
 
 ```js
-assert.match(goFight.toString(), /update\(locations\[3\]\)/);
+assert.match(goFight.toString(), /update\(\s*locations\s*\[\s*3\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
index 704fcd99fb1..2e11e5e73a1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e21398ad61520edb724f
-title: 步驟 115
+title: Step 114
 challengeType: 0
-dashedName: step-115
+dashedName: step-114
 ---
 
 # --description--
@@ -14,13 +14,13 @@ Below your `update` call, set the `monsterHealth` to be the health of the curren
 You should use bracket notation to access the `monsters` array at the `fighting` index.
 
 ```js
-assert.match(goFight.toString(), /monsters\[fighting\]/);
+assert.match(goFight.toString(), /monsters\s*\[\s*fighting\s*\]/);
 ```
 
 You should assign the value of `monsters[fighting]` to the `monsterHealth` variable.
 
 ```js
-assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\[fighting\](\.health|\[('|")health\2\])/);
+assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\s*\[\s*fighting\s*\]\s*(\.health|\[\s*('|")health\2\s*\])/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
index 37e3d7ad70f..903111d76a2 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
@@ -1,18 +1,25 @@
 ---
 id: 62a8e24c673b075317cc0b09
-title: 步驟 116
+title: Step 115
 challengeType: 0
-dashedName: step-116
+dashedName: step-115
 ---
 
 # --description--
 
-The HTML element that shows the monster's stats has been hidden with CSS. Display the `monsterStats` element by updating the `display` property of the `style` property to `block`. For example, updating the `first` property of the `name` property of `user` would look like:
+By default, the HTML element that shows the monster's stats has been hidden with CSS. When the player clicks the "Fight dragon" button, the monster's stats should be displayed. You can accomplish this by using the <dfn>style</dfn> and <dfn>display</dfn> properties on the `monsterStats` element.
+
+The `style` property is used to access the inline style of an element and the `display` property is used to set the visibility of an element.
+
+Here is an example of how to update the display for a paragraph element:
 
 ```js
-user.name.first = "Naomi";
+const paragraph = document.querySelector('p');
+paragraph.style.display = 'block';
 ```
 
+Display the `monsterStats` element by updating the `display` property of the `style` property to `block`.
+
 # --hints--
 
 You should use dot notation to access the `style` property of `monsterStats`.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
index d4ba7625f92..8629818b67e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e271f8e3d1541f9624ad
-title: 步驟 117
+title: Step 116
 challengeType: 0
-dashedName: step-117
+dashedName: step-116
 ---
 
 # --description--
 
-Now, set the `innerText` property of `monsterName` to be the `name` property of the current monster. Do the same for `monsterHealthText` and the `health` property.
+Now, you will need to update the text for the current monster's name and health.
+
+Start by assigning `monsters[fighting].name` to the `innerText` property of `monsterName`. Then, assign `monsterHealth` to the `innerText` property of `monsterHealthText`.
 
 # --hints--
 
@@ -17,10 +19,10 @@ You should use dot notation to access the `innerText` property of `monsterName`.
 assert.match(goFight.toString(), /monsterName\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterName` to be the `name` value of the current monster. Remember that you can get the current monster with `monsters[fighting]`.
+You should assign `monsters[fighting].name` to `monsterName.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\[fighting\]\.name/);
+assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 You should use dot notation to access the `innerText` property of `monsterHealthText`.
@@ -29,10 +31,10 @@ You should use dot notation to access the `innerText` property of `monsterHealth
 assert.match(goFight.toString(), /monsterHealthText\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterHealthText` to be the `health` value of the current monster. You can get the current monster with `monsters[fighting]` or you can access this value using the `monsterHealth` variable that you previously assigned.
+You should assign `monsterHealth` to `monsterHealthText.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\[fighting\]\.health/);
+assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.health/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
index 50a1fad5dab..c715960538e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e35675c18c56354c08cf
-title: 步驟 118
+title: Step 117
 challengeType: 0
-dashedName: step-118
+dashedName: step-117
 ---
 
 # --description--
 
-Now you can build the `attack` function. First, update the `text` message to say `The <monster name> attacks.`, replacing `<monster name>` with the name of the monster. Remember you can use the concatenation operator for this.
+Now you can build the `attack` function. First, update the `text` message to say `"The <monster name> attacks."`, replacing `<monster name>` with the name of the monster. Remember you can use the concatenation operator for this.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1/);
 You should use the concatenation operator to add the value of `monsters[fighting].name` to the `The` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 You should use the concatenation operator to add the string `attacks.` to the `monsters[fighting].name` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name\s*\+\s*('|") attacks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name\s*\+\s*('|") attacks\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
index c9653b798ca..e062f34ae25 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e41e2f190c58404dd46e
-title: Step 119
+title: Step 118
 challengeType: 0
-dashedName: step-119
+dashedName: step-118
 ---
 
 # --description--
 
-On a new line, add the string `You attack it with your <weapon>.` to the `text` value, replacing `<weapon>` with the player's current weapon.
+On a new line, use the addition assignment operator(`+=`), to add the string `" You attack it with your <weapon>."` to the `text` value, replacing `<weapon>` with the player's current weapon. Additionally, remember that this line of text starts with a space so it will properly display.
 
 # --hints--
 
@@ -24,7 +24,7 @@ You should use compound assignment with `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=/);
 ```
 
-You should add the string `You attack it with your` to the `text.innerText` value. Remember that spacing matters.
+You should add the string `" You attack it with your "` to the `text.innerText` value. Remember that spacing matters.
 
 ```js
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1/);
@@ -33,13 +33,13 @@ assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it wit
 You should use the concatenation operator to add the current weapon to the string. You can get the current weapon with `weapons[currentWeapon].name`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name/);
 ```
 
-You should use the concatenation operator to end your string with `.`.
+You should use the concatenation operator to end your string with `"."`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name\s*\+\s*('|")\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*\+\s*('|")\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
index b361327a46e..689a350b599 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e45cc600c3591cee671a
-title: Step 120
+title: Step 119
 challengeType: 0
-dashedName: step-120
+dashedName: step-119
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(attack.toString(), /health\s*-=/);
 You should subtract the monster's current level from `health`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*monsters\[fighting\]\.level/);
+assert.match(attack.toString(), /health\s*-=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
index edbe68894a5..ac76865ed0a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e49f4df7af5ae2d7a616
-title: Step 121
+title: Step 120
 challengeType: 0
-dashedName: step-121
+dashedName: step-120
 ---
 
 # --description--
 
-Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon. Remember you have the `currentWeapon` variable and the `power` property.
+Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon.
+
+Remember that you can access the power of the player's current weapon using `weapons[currentWeapon].power`.
 
 # --hints--
 
@@ -20,19 +22,19 @@ assert.match(attack.toString(), /monsterHealth\s*-=/);
 You should use bracket notation with `currentWeapon` to access `weapons`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 You should use dot notation to access the `power` property of `weapons[currentWeapon]`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 You should subtract the `power` of the current weapon from `monsterHealth`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
index 7052a0ec1ea..01b05467403 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8e4dc6a60f85bf256a0cb
-title: Step 122
+title: Step 121
 challengeType: 0
-dashedName: step-122
+dashedName: step-121
 ---
 
 # --description--
 
 The `Math` object in JavaScript contains static properties and methods for mathematical constants and functions. One of those is `Math.random()`, which generates a random number from `0` (inclusive) to `1` (exclusive). Another is `Math.floor()`, which rounds a given number down to the nearest integer.
 
-Using these, you can generate a random number within a range. For example, this generates a random number between 1 and 5: `Math.floor(Math.random() * 5) + 1;`.
+Using these, you can generate a random number within a range. For example, this generates a random number between `1` and `5`: `Math.floor(Math.random() * 5) + 1;`.
 
 Following this pattern, use the addition operator (`+`) to add a random number between `1` and the value of `xp` to your `monsterHealth -= weapons[currentWeapon].power`.
 
@@ -24,7 +24,7 @@ assert.lengthOf(attack.toString().match(/monsterHealth/g), 1);
 You should add to the `weapons[currentWeapon].power` value.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+/);
 ```
 
 You should use `Math.floor()`.
@@ -42,25 +42,25 @@ assert.match(attack.toString(), /Math\.random/);
 You should multiply `Math.random()` by the value of `xp`.
 
 ```js
-assert.match(attack.toString(), /Math\.random\(\)\s*\*\s*xp/);
+assert.match(attack.toString(), /Math\.random\(\s*\)\s*\*\s*xp/);
 ```
 
 You should use `Math.floor()` to round the result of `Math.random() * xp` down.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\)\s*\*\s*xp\s*.*\)/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*.*\)/);
 ```
 
 You should add `1` to the result of `Math.floor()`.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 You should add the result of `Math.floor(Math.random() * xp) + 1` to the result of `weapons[currentWeapon].power`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
index d07c342c9ed..4931f15d514 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ed36d7a7915dfa444ba2
-title: Step 123
+title: Step 122
 challengeType: 0
-dashedName: step-123
+dashedName: step-122
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
index 8176c5ad328..6840b996d8a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8edd05e27cc668051686f
-title: Step 124
+title: Step 123
 challengeType: 0
-dashedName: step-124
+dashedName: step-123
 ---
 
 # --description--
@@ -20,13 +20,13 @@ assert.match(attack.toString(), /if/);
 Your `if` statement should check if `health` is less than or equal to `0`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(health\s*<=\s*0\)/);
+assert.match(attack.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 ```
 
 你的 `if` 語句應該調用 `lose` 函數。
 
 ```js
-assert.match(attack.toString(), /lose\(\)/);
+assert.match(attack.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
index 9c80b8cd6b4..7b723a59545 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee154c8946678775c4a4
-title: Step 125
+title: Step 124
 challengeType: 0
-dashedName: step-125
+dashedName: step-124
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
index 6bbfbde991a..2929ee44bf5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee71f018e968a056d369
-title: Step 126
+title: Step 125
 challengeType: 0
-dashedName: step-126
+dashedName: step-125
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(code, /function\s+defeatMonster/);
 `defeatMonster` should be an empty function.
 
 ```js
-assert.match(defeatMonster.toString(), /defeatMonster\s*\(\)\s*\{\s*\}/);
+assert.match(defeatMonster.toString(), /defeatMonster\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 You should use the `function` keyword to declare `lose`.
@@ -32,7 +32,7 @@ assert.match(code, /function\s+lose/);
 `lose` should be an empty function.
 
 ```js
-assert.match(lose.toString(), /lose\s*\(\)\s*\{\s*\}/);
+assert.match(lose.toString(), /lose\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
index 477c4f7710e..f8f57306b03 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8eec45f77bc69e8775294
-title: Step 127
+title: Step 126
 challengeType: 0
-dashedName: step-127
+dashedName: step-126
 ---
 
 # --description--
 
-Inside the `dodge` function, set `text.innerText` equal to the string `You dodge the attack from the <monster>`. Replace `<monster>` with the name of the monster, using the `name` property.
+Inside the `dodge` function, set `text.innerText` equal to the string `"You dodge the attack from the <monster>"`. Replace `<monster>` with the name of the monster, using the `name` property.
 
 # --hints--
 
-You should assign the string `You dodge the attack from the` to the `text.innerText` property. Remember that spacing matters.
+You should assign the string `"You dodge the attack from the "` to the `text.innerText` property. Remember that spacing matters.
 
 ```js
 assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1/);
@@ -20,7 +20,7 @@ assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack
 You should use the concatenation operator to add the name of the monster to the end of the string. You can get this with `monsters[fighting].name`.
 
 ```js
-assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
index 06490d9093e..e32d3bd0439 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8eefe2e68b66ac563816b
-title: Step 128
+title: Step 127
 challengeType: 0
-dashedName: step-128
+dashedName: step-127
 ---
 
 # --description--
 
-In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. You can get the monster's level with the `level` property.
+In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. Remember you can get the monster's level by using `monsters[fighting].level`.
 
 Here is an example of setting `num` to `num` plus `5` * `8`: `num += 5 * 8`. Use `Math.floor()` to round the result down.
 
@@ -22,13 +22,13 @@ assert.match(defeatMonster.toString(), /gold\s*\+=/);
 You should use `Math.floor()` to round the result of the monster's level times `6.7`.
 
 ```js
-assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\))/);
 ```
 
 You should add the result of `Math.floor(monsters[fighting].level * 6.7)` to `gold`.
 
 ```js
-assert.match(defeatMonster.toString(), /gold\s*\+=\s*(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /gold\s*\+=\s*((Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)))/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
index 3301aa6246b..a23344528d5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef6a52292f6bdca4f6f8
-title: Step 129
+title: Step 128
 challengeType: 0
-dashedName: step-129
+dashedName: step-128
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /xp\s*\+=/);
 You should add the monster's level to `xp`.
 
 ```js
-assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\[fighting\]\.level/);
+assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
index 1170568e396..d573e966cac 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef8f0c76a46cd221a68c
-title: Step 130
+title: Step 129
 challengeType: 0
-dashedName: step-130
+dashedName: step-129
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
index fd123524213..4a948c96439 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8efb0e3ce826db8daf80f
-title: Step 131
+title: Step 130
 challengeType: 0
-dashedName: step-131
+dashedName: step-130
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /update/);
 You should pass `locations[4]` as the argument.
 
 ```js
-assert.match(defeatMonster.toString(), /update\(locations\[4\]\)/);
+assert.match(defeatMonster.toString(), /update\(\s*locations\s*\[\s*4\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
index db2c7c81425..76fd64bb570 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8eff21c0b0f6ebe5b8e38
-title: Step 132
+title: Step 131
 challengeType: 0
-dashedName: step-132
+dashedName: step-131
 ---
 
 # --description--
 
 Your `locations` array doesn't have a fifth element, so `locations[4]` doesn't work.
 
-Add a new object at the end of the `locations` array, following the same structure as the other objects. Set `name` to `kill monster`, set `button text` to an array with three `Go to town square` strings, set `button functions` to an array with three `goTown` variables, and set `text` to `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Add a new object at the end of the `locations` array, following the same structure as the other objects. Set `name` to `"kill monster"`, set `"button text"` to an array with three `"Go to town square"` strings, set `"button functions"` to an array with three `goTown` variables, and set `text` to `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 # --hints--
 
@@ -25,25 +25,25 @@ Your fifth `locations` value should be an object.
 assert.isObject(locations[4]);
 ```
 
-Your fifth `locations` value should have a `name` property with the value `kill monster`.
+Your fifth `locations` value should have a `name` property with the value `"kill monster"`.
 
 ```js
 assert.equal(locations[4].name, 'kill monster');
 ```
 
-Your fifth `locations` value should have a `button text` array with three `Go to town square` strings.
+Your fifth `locations` value should have a `"button text"` array with three `"Go to town square"` strings.
 
 ```js
 assert.deepEqual(locations[4]["button text"], ['Go to town square', 'Go to town square', 'Go to town square']);
 ```
 
-Your fifth `locations` value should have a `button functions` array with three `goTown` variables.
+Your fifth `locations` value should have a `"button functions"` array with three `goTown` variables.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, goTown]);
 ```
 
-Your fifth `locations` value should have a `text` property with the value `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Your fifth `locations` value should have a `text` property with the value `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams Arg! as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
index 6209dc3d35d..42320970f45 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8f06fb318666fef69f91e
-title: Step 133
+title: Step 132
 challengeType: 0
-dashedName: step-133
+dashedName: step-132
 ---
 
 # --description--
 
-The word `Arg!` should have quotes around it. Besides escaping quotes, there is another way you can include quotation marks inside a string.
+The word `"Arg!"` should have quotes around it. Besides escaping quotes, there is another way you can include quotation marks inside a string.
 
-Change the double quotes around the string `The monster screams Arg! as it dies. You gain experience points and find gold.` to single quotes `'`, then add double quotes around `Arg!`.
+Change the double quotes around the string `"The monster screams Arg! as it dies. You gain experience points and find gold."` to single quotes `'`, then add double quotes around `"Arg!"`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should use single quotes around the string.
 assert.match(code, /'The monster screams "?Arg!"? as it dies. You gain experience points and find gold.'/);
 ```
 
-You should use double quotes around `Arg!`.
+You should use double quotes around `"Arg!"`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams "Arg!" as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
index d3d163e5feb..9137e403c0b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f14fe6d1fc72454648c7
-title: Step 134
+title: Step 133
 challengeType: 0
-dashedName: step-134
+dashedName: step-133
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
index 27cfddf7384..9d984dbb5a9 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f1d5f5ddbf74c07f733b
-title: Step 135
+title: Step 134
 challengeType: 0
-dashedName: step-135
+dashedName: step-134
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(lose.toString(), /update\(/);
 Your `update` function should have `locations[5]` for the argument.
 
 ```js
-assert.match(lose.toString(), /update\(locations\[5\]\)/);
+assert.match(lose.toString(), /update\(\s*locations\s*\[\s*5\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
index 9947c835faa..a4d22989a7e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f20463b324759953edad
-title: Step 136
+title: Step 135
 challengeType: 0
-dashedName: step-136
+dashedName: step-135
 ---
 
 # --description--
@@ -45,7 +45,7 @@ Your `restart` function should set `currentWeapon` to `0`.
 assert.match(restart.toString(), /currentWeapon\s*=\s*0/);
 ```
 
-Your `restart` function should set `inventory` to an array with the string `stick`.
+Your `restart` function should set `inventory` to an array with the string `"stick"`.
 
 ```js
 assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
@@ -54,7 +54,7 @@ assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
 Your `restart` function should call the `goTown()` function.
 
 ```js
-assert.match(restart.toString(), /goTown\(\)/);
+assert.match(restart.toString(), /goTown\(\s*\)/);
 ```
 
 You should set `goldText.innerText` to the value of `gold`.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
index 35c1b321145..6e05e05b776 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f256b813a476cae51f49
-title: Step 138
+title: Step 137
 challengeType: 0
-dashedName: step-138
+dashedName: step-137
 ---
 
 # --description--
@@ -41,7 +41,7 @@ You should call the `winGame` function in your `if` block.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\)(\s*\})?/);
+assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\s*\)(\s*\})?/);
 ```
 
 You should add an `else` block.
@@ -55,7 +55,7 @@ Your `else` block should call the `defeatMonster` function.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\)(\s*\})?/);
+assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\s*\)(\s*\})?/);
 ```
 
 # --seed--
@@ -220,7 +220,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
index 095200ed56e..a43ddc6b3af 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
@@ -20,7 +20,7 @@ assert.match(code, /function\s+winGame/);
 Your `winGame` function should call the `update` function and pass in `locations[6]`.
 
 ```js
-assert.match(winGame.toString(), /update\s*\(\s*locations\[6\]\s*\)/);
+assert.match(winGame.toString(), /update\s*\(\s*locations\s*\[\s*6\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -185,7 +185,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
index b70c74ede29..f2b63a0893c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
@@ -7,7 +7,7 @@ dashedName: step-140
 
 # --description--
 
-Add another object in the `locations` array. Everything should be the same as the `lose` object, except the `name` should be `win` and the `text` should be `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Add another object in the `locations` array. Everything should be the same as the `lose` object, except the `name` should be `"win"` and the `text` should be `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 # --hints--
 
@@ -23,13 +23,13 @@ Your seventh `locations` value should be an object.
 assert.isObject(locations[6]);
 ```
 
-Your seventh `locations` value should have a `name` property with the value `win`.
+Your seventh `locations` value should have a `name` property with the value `"win"`.
 
 ```js
 assert.equal(locations[6].name, 'win');
 ```
 
-Your seventh `locations` value should have a `button text` array with three `REPLAY?` strings.
+Your seventh `locations` value should have a `button text` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[6]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
@@ -41,10 +41,10 @@ Your seventh `locations` value should have a `button functions` array with three
 assert.deepEqual(locations[6]["button functions"], [restart, restart, restart]);
 ```
 
-Your seventh `locations` value should have a `text` property with the value `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Your seventh `locations` value should have a `text` property with the value `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 ```js
-assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! 🎉');
+assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! &#x1F389;');
 ```
 
 # --seed--
@@ -210,7 +210,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 --fcc-editable-region--
 ];
@@ -228,7 +228,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
index 0d04a74a7a4..80a571d7862 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
@@ -16,7 +16,7 @@ While your game is feature complete at this stage, there are things you can do t
 `health` 所在行的代碼應該修改爲 `health -= getMonsterAttackValue(monsters[fighting].level);`。
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(monsters\[fighting\]\.level\)/);
+assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)/);
 ```
 
 # --seed--
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -204,7 +204,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
index 1e7e94fdfc7..52520baa6ed 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1d6736ba262cfa74344b
-title: 步驟 142
+title: Step 142
 challengeType: 0
 dashedName: step-142
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
index 2e289b8b1c5..150980e7550 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1d9f535e102e4663e7a6
-title: 步驟 143
+title: Step 143
 challengeType: 0
 dashedName: step-143
 ---
@@ -22,13 +22,13 @@ assert.match(code, /const\s+hit/);
 你應該使用 `(level * 5) - (Math.floor(Math.random() * xp))`。
 
 ```js
-assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(Math\.random\(\)\s*\*\s*xp\))/);
+assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\))/);
 ```
 
 你應該把 `hit` 設置爲 `(level * 5) - (Math.floor(Math.random() * xp))` 的值。
 
 ```js
-assert.match(code, /hit\s*=\s*\(level\s*\*\s*5\)\s*-\s*\(Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\)/);
+assert.match(code, /hit\s*=\s*\(\s*level\s*\*\s*5\s*\)\s*-\s*\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
index 2a722f138ff..ec8a2ba7f38 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1e3c7c3d552fb04f0f18
-title: 步驟 144
+title: Step 144
 challengeType: 0
 dashedName: step-144
 ---
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
index b24237a6bf3..d8f0875146b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1e8ccd579330e097ce44
-title: 步驟 145
+title: Step 145
 challengeType: 0
 dashedName: step-145
 ---
@@ -188,13 +188,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -211,7 +211,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
index ee69e6e3ae9..10a8466ad56 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1eec891ed731db227a36
-title: 步驟 146
+title: Step 146
 challengeType: 0
 dashedName: step-146
 ---
@@ -207,13 +207,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -230,7 +230,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
index 329753e8b2f..351dab64559 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1fed3d4e873366ff3131
-title: 步驟 147
+title: Step 147
 challengeType: 0
 dashedName: step-147
 ---
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
index d6898b16a90..8ac903940a1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa204c1e1d33348ff09944
-title: 步驟148
+title: Step 148
 challengeType: 0
 dashedName: step-148
 ---
@@ -14,7 +14,7 @@ Move your `monsterHealth` assignment into your `if` block.
 You should move your `monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1` into your `if` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1/)
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
index ec8229acffd..0f1429cf2ad 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
@@ -7,20 +7,20 @@ dashedName: step-149
 
 # --description--
 
-Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `You miss.` to the end of `text.innerText`.
+Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `" You miss."` to the end of `text.innerText`.
 
 # --hints--
 
 You should add an `else` block after your `if (isMonsterHit())` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else/)
 ```
 
-You should add the text `You miss.` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
+You should add the text `" You miss."` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
index 67dfb73b231..d416bbb7431 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
@@ -20,7 +20,7 @@ assert.match(code, /function\s+isMonsterHit/);
 Your `isMonsterHit` function should return the result of the comparison `Math.random() > .2`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2/);
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
index 4c520baa5fa..7784c2d49de 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa21971e3b743844849985
-title: 步驟 151
+title: Step 151
 challengeType: 0
 dashedName: step-151
 ---
@@ -32,7 +32,7 @@ assert.match(isMonsterHit.toString(), /\|\|\s*health\s*<\s*20/);
 Your function should return the result of the comparison `Math.random() > .2` **or** `health < 20`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
 ```
 
 # --seed--
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
index 495bec18415..fa6e46189de 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
@@ -21,7 +21,7 @@ assert.lengthOf(ifs, 5);
 Your new `if` statement should check `Math.random() <= .1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\)\s*<=\s*0?\.1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*<=\s*0?\.1\s*\)/);
 ```
 
 # --seed--
@@ -186,13 +186,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -209,7 +209,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
index 9ebf66f29ff..75e7e7fdc67 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
@@ -7,7 +7,7 @@ dashedName: step-153
 
 # --description--
 
-Use the `+=` operator to add `Your <weapon> breaks.`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
+Use the `+=` operator to add `" Your <weapon> breaks."`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
 
 # --hints--
 
@@ -21,7 +21,7 @@ assert.lengthOf(concat, 3);
 You should use the `pop` method on the `inventory` array.
 
 ```js
-assert.match(attack.toString(), /inventory\.pop\(\)/);
+assert.match(attack.toString(), /inventory\.pop\(\s*\)/);
 ```
 
 You should add `Your`, with a space before and after it, to `text.innerText`.
@@ -30,17 +30,16 @@ You should add `Your`, with a space before and after it, to `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1/);
 ```
 
-You should add the return value of `inventory.pop()` to the `Your` string.
+You should add the return value of `inventory.pop()` to the `" Your "` string.
 
 ```js
-console.log(attack.toString());
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)/);
 ```
 
-You should add `breaks.`, with a space in front of it, to the end of your string.
+You should add `" breaks."`, with a space in front of it, to the end of your string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)\s*\+\s*('|")\sbreaks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)\s*\+\s*('|")\sbreaks\.\2/);
 ```
 
 # --seed--
@@ -205,13 +204,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -228,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
index 97d5746c0e6..cb4f98370a3 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
@@ -7,7 +7,13 @@ dashedName: step-154
 
 # --description--
 
-Remember that the increment operator `++` can be used to increase a variable's value by 1. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by 1.
+Remember that the increment operator `++` can be used to increase a variable's value by `1`. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by `1`. For example :
+
+```js
+let num = 10;
+num--;
+console.log(num); // Output: 9
+```
 
 Decrement the value of `currentWeapon` in your `if` statement, after you update the text.
 
@@ -187,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -210,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
index 81204537ebf..fb08209886d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
@@ -24,19 +24,19 @@ if (firstName === "Quincy" && lastName === "Larson") {
 You should not modify your existing `if` statement.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1/);
 ```
 
 You should use the logical AND operator `&&`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&/);
 ```
 
 You should use the logical AND operator to check if `inventory.length` does not equal `1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
 ```
 
 # --seed--
@@ -201,13 +201,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
index fe35aa83b6e..3320abac13c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
@@ -28,7 +28,7 @@ assert.match(easterEgg.toString(), /update\(/);
 `easterEgg` should call the `update` function with `locations[7]` as the argument.
 
 ```js
-assert.match(easterEgg.toString(), /update\(\s*locations\[7\]\s*\)/);
+assert.match(easterEgg.toString(), /update\(\s*locations\s*\[\s*7\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
index 8b206dd706a..bc5c75fdb1e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa252c3b1073415ba2b898
-title: 步驟 157
+title: Step 157
 challengeType: 0
 dashedName: step-157
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
index 8ff8ec6621b..c4f60b0792a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
@@ -211,13 +211,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -234,7 +234,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
index 86611a573e7..5bcd8e739c0 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa25fcb5837d43b4d9873d
-title: 步驟 159
+title: Step 159
 challengeType: 0
 dashedName: step-159
 ---
 
 # --description--
 
-Add another object to your `locations` array. Set `name` to `easter egg`, set `button text` to an array with the strings `2`, `8`, and `Go to town square?`, set `button functions` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Add another object to your `locations` array. Set `name` to `"easter egg"`, set `"button text"` to an array with the strings `"2"`, `"8"`, and `"Go to town square?"`, set `"button functions"` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 # --hints--
 
@@ -23,25 +23,25 @@ Your eighth `locations` value should be an object.
 assert.isObject(locations[7]);
 ```
 
-Your eighth `locations` value should have a `name` property with the value `easter egg`.
+Your eighth `locations` value should have a `name` property with the value `"easter egg"`.
 
 ```js
 assert.equal(locations[7].name, "easter egg");
 ```
 
-Your eighth `locations` value should have a `button text` array with the strings `2`, `8`, and `Go to town square?`.
+Your eighth `locations` value should have a `"button text"` array with the strings `"2"`, `"8"`, and `"Go to town square?"`.
 
 ```js
 assert.deepEqual(locations[7]["button text"], ["2", "8", "Go to town square?"]);
 ```
 
-Your eighth `locations` value should have a `button functions` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
+Your eighth `locations` value should have a `"button functions"` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[7]["button functions"], [pickTwo, pickEight, goTown]);
 ```
 
-Your eighth `locations` value should have a `text` property with the value `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Your eighth `locations` value should have a `text` property with the value `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 ```js
 assert.equal(locations[7].text, "You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!");
@@ -209,13 +209,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
 --fcc-editable-region--
 
@@ -235,7 +235,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
index 4eb559dc555..144e384890e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
@@ -14,7 +14,7 @@ Inside `pick`, use `const` to initialize a variable named `numbers` and set it t
 Your `pick` function should initialize `numbers` to an empty array `[]`.
 
 ```js
-assert.match(pick.toString(), /numbers\s*=\s*\[\]/);
+assert.match(pick.toString(), /numbers\s*=\s*\[\s*\]/);
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
index 31b448fa808..690b9c4efd5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa264d23cdaa45a20efada
-title: 步驟 161
+title: Step 161
 challengeType: 0
 dashedName: step-161
 ---
@@ -195,13 +195,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
index 4e5a32dd0b7..c7319b7da11 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa26cca3cd3d46c431e73b
-title: 步驟 162
+title: Step 162
 challengeType: 0
 dashedName: step-162
 ---
@@ -20,13 +20,13 @@ assert.match(pick.toString(), /numbers\.push\(/);
 You should use `Math.floor(Math.random() * 11)` to create the random number.
 
 ```js
-assert.match(pick.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)/);
+assert.match(pick.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)/);
 ```
 
 You should `push` the result of `Math.floor(Math.random() * 11)` to the end of the `numbers` array.
 
 ```js
-assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)\s*\)/);
+assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
index 6f6db396fee..50ee79091f1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
@@ -7,23 +7,23 @@ dashedName: step-163
 
 # --description--
 
-After the `while` loop, set `text.innerText` to equal `You picked <someGuess>. Here are the random numbers:`. Replace `<someGuess>` with the `guess` function parameter.
+After the `while` loop, set `text.innerText` to equal `"You picked <someGuess>. Here are the random numbers:"`. Replace `<someGuess>` with the `guess` function parameter.
 
 # --hints--
 
-You should set `text.innerText` to the string `You picked`. Remember that spacing matters.
+You should set `text.innerText` to the string `"You picked "`. Remember that spacing matters.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1/);
 ```
 
-You should use the concatenation operator to add the value of the `guess` parameter to your `You picked` string.
+You should use the concatenation operator to add the value of the `guess` parameter to your `"You picked "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess/);
 ```
 
-You should use the concatenation operator to add the string `. Here are the random numbers:` to your `"You picked " + guess` string.
+You should use the concatenation operator to add the string `". Here are the random numbers:"` to your `"You picked " + guess` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\2/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
index 5f4c6ece5c7..b5c0ff67275 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
@@ -11,7 +11,7 @@ At the end of the string, before the final quote, insert the new line escape cha
 
 # --hints--
 
-You should add the new line escape character `\n` to your `. Here are the random numbers:` string.
+You should add the new line escape character `\n` to your `". Here are the random numbers: "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\\n\2/);
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
index b1feb5c19e8..4cfce9c5908 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -214,7 +214,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
index 0030e660a57..1f2ce1ffbfa 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
@@ -11,7 +11,7 @@ dashedName: step-166
 
 The initialization expression is executed only once, before the loop starts, and is often used to define and set up the loop variable. Think of it like declaring a counter to use in your loop.
 
-Many `for` loops use `i` as the counter and start from 0, so change `let x = 1;` to `let i = 0;`.
+Many `for` loops use `i` as the counter and start from `0`, so change `let x = 1;` to `let i = 0;`.
 
 # --hints--
 
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
index b6b9c8a6121..82b517528b7 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
@@ -9,7 +9,7 @@ dashedName: step-167
 
 The second statement in a `for` loop, the condition statement, is evaluated at the beginning of every loop iteration. The loop will continue as long as the condition evaluates to be true.
 
-We want the loop to run 10 times, so change `x < 5` to `i < 10`.
+We want the loop to run `10` times, so change `x < 5` to `i < 10`.
 
 # --hints--
 
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
index d9ec16a15e7..d87e5e62858 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
index d7f2dcd44d4..71875c1a0ea 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
@@ -20,20 +20,19 @@ assert.match(pick.toString(), /text\.innerText\s*\+=/);
 You should use bracket notation to access `numbers[i]`.
 
 ```js
-assert.match(pick.toString(), /numbers\[i\]/);
+assert.match(pick.toString(), /numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add `numbers[i]` to your `text.innerText` value.
 
 ```js
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add a new-line character after the `numbers[i]` value. Remember that you can do this with `\n`.
 
 ```js
-console.log(pick.toString());
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]\s*\+\s*('|")\\n\1/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]\s*\+\s*('|")\\n\1/);
 ```
 
 # --seed--
@@ -198,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
index 04c6da995f6..5d2de454974 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
@@ -198,13 +198,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
index 8c027fab766..659e9a1e4b1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
@@ -7,11 +7,11 @@ dashedName: step-171
 
 # --description--
 
-Inside the `if` statement, add the string `Right! You win 20 gold!` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
+Inside the `if` statement, add the string `"Right! You win 20 gold!"` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
 
 # --hints--
 
-You should use compound assignment to add the string `Right! You win 20 gold!` to the end of `text.innerText`.
+You should use compound assignment to add the string `"Right! You win 20 gold!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Right! You win 20 gold!\1/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
index e055f53dc63..b0868a55bf0 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa29d8f8f88152c91350ca
-title: 步驟 172
+title: Step 172
 challengeType: 0
 dashedName: step-172
 ---
 
 # --description--
 
-Now add an `else` statement. Inside, add `Wrong! You lose 10 health!` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
+Now add an `else` statement. Inside, add `"Wrong! You lose 10 health!"` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should add an `else` block.
 assert.match(pick.toString(), /else\s*\{/);
 ```
 
-Your `else` block should use compound assignment to add `Wrong! You lose 10 health!` to the end of `text.innerText`.
+Your `else` block should use compound assignment to add `"Wrong! You lose 10 health!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Wrong! You lose 10 health!\1/);
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -226,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
index 5a9af82631f..650fe59ddd1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
@@ -27,7 +27,7 @@ assert.match(pick.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 Your `if` statement should call the `lose` function.
 
 ```js
-assert.match(pick.toString(), /lose\(\)/);
+assert.match(pick.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
@@ -192,13 +192,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -221,7 +221,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
index c7ee7cc6831..ebf70ca3d06 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
@@ -1,19 +1,19 @@
 ---
 id: 62aa2ba9cd881355a6f0a5a8
-title: 步驟 174
+title: Step 174
 challengeType: 0
 dashedName: step-174
 ---
 
 # --description--
 
-Looking at your `kill monster` object, `button functions` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `button text`.
+Looking at your `"kill monster"` object, `"button functions"` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `"button text"`.
 
 With this, your RPG game is complete! You can now play around - can you defeat the dragon?
 
 # --hints--
 
-You should update your fifth `locations` object to have a `button functions` property of `[goTown, goTown, easterEgg]`.
+You should update your fifth `locations` object to have a `"button functions"` property of `[goTown, goTown, easterEgg]`.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, easterEgg]);
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
@@ -557,13 +557,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
index 710dd2e3c95..f3d11a95837 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
@@ -1,13 +1,13 @@
 ---
 id: 62ba17beef16c563069a65d8
-title: Step 137
+title: Step 136
 challengeType: 0
-dashedName: step-137
+dashedName: step-136
 ---
 
 # --description--
 
-In the `locations` array, add another object at the end. Set the `name` property to `lose`, set `button text` to an array with three `REPLAY?` strings, set `button functions` to an array with three `restart` variables, and set `text` to `You die. ☠️`. You can copy that text to use the emote.
+In the `locations` array, add another object at the end. Set the `name` property to `"lose"`, set `"button text"` to an array with three `"REPLAY?"` strings, set `"button functions"` to an array with three `restart` variables, and set `text` to `"You die. &#x2620;"`.
 
 # --hints--
 
@@ -23,28 +23,28 @@ Your sixth `locations` value should be an object.
 assert.isObject(locations[5]);
 ```
 
-Your sixth `locations` value should have a `name` property with the value `lose`.
+Your sixth `locations` value should have a `name` property with the value `"lose"`.
 
 ```js
 assert.equal(locations[5].name, 'lose');
 ```
 
-Your sixth `locations` value should have a `button text` array with three `REPLAY?` strings.
+Your sixth `locations` value should have a `"button text"` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[5]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
 ```
 
-Your sixth `locations` value should have a `button functions` array with three `restart` variables.
+Your sixth `locations` value should have a `"button functions"` array with three `restart` variables.
 
 ```js
 assert.deepEqual(locations[5]["button functions"], [restart, restart, restart]);
 ```
 
-Your sixth `locations` value should have a `text` property with the value `You die. ☠️`.
+Your sixth `locations` value should have a `text` property with the value `"You die. &#x2620;"`.
 
 ```js
-assert.equal(locations[5].text, 'You die. ☠️');
+assert.equal(locations[5].text, 'You die. &#x2620;');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
index 2fac7c3f4fc..a83c5e84209 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
@@ -17,7 +17,7 @@ You should declare a `button2` variable with `const`.
 assert.match(code, /const\s+button2/);
 ```
 
-Your `button2` variable should have the value of your `#button2` element.
+Your `button2` variable should have the value of your `"#button2"` element.
 
 ```js
 assert.deepEqual(button2, document.querySelector('#button2'));
@@ -29,7 +29,7 @@ You should declare a `button3` variable with `const`.
 assert.match(code, /const\s+button3/);
 ```
 
-Your `button3` variable should have the value of your `#button3` element.
+Your `button3` variable should have the value of your `"#button3"` element.
 
 ```js
 assert.deepEqual(button3, document.querySelector('#button3'));
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
new file mode 100644
index 00000000000..432c7be3420
--- /dev/null
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
@@ -0,0 +1,356 @@
+---
+id: 65b2f6acce65b7a69751a090
+title: Step 138
+challengeType: 0
+dashedName: step-138
+---
+
+# --description--
+
+In order for the `&#x2620;` emoticon text to properly display on the page, you will need to use the <dfn>innerHTML</dfn> property.
+
+The `innerHTML` property allows you to access or modify the content inside an HTML element using JavaScript.
+
+Here is an example of updating the content for this paragraph element using the `innerHTML`  property.
+
+```html
+<p id="demo">This is a paragraph.</p>
+```
+
+```js
+document.querySelector("#demo").innerHTML = "Hello, innerHTML!";
+```
+
+In the `update` function, change `text.innerText` to `text.innerHTML`.
+
+# --hints--
+
+
+You should use dot notation to access the `innerHTML` property of `text`.
+
+```js
+assert.match(code, /text\.innerHTML/);
+```
+
+You should not use `let` or `const` to access the `innerHTML` property of `text`.
+
+```js
+assert.notMatch(code, /(let|const)\s+text.innerHTML/);
+```
+
+You should set `innerHTML` equal to the `text` property of `location`.
+
+```js
+assert.match(code, /text\.innerHTML\s*=\s*location\.text/);
+```
+
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <link rel="stylesheet" href="./styles.css">
+    <title>RPG - Dragon Repeller</title>
+  </head>
+  <body>
+    <div id="game">
+      <div id="stats">
+        <span class="stat">XP: <strong><span id="xpText">0</span></strong></span>
+        <span class="stat">Health: <strong><span id="healthText">100</span></strong></span>
+        <span class="stat">Gold: <strong><span id="goldText">50</span></strong></span>
+      </div>
+      <div id="controls">
+        <button id="button1">Go to store</button>
+        <button id="button2">Go to cave</button>
+        <button id="button3">Fight dragon</button>
+      </div>
+      <div id="monsterStats">
+        <span class="stat">Monster Name: <strong><span id="monsterName"></span></strong></span>
+        <span class="stat">Health: <strong><span id="monsterHealth"></span></strong></span>
+      </div>
+      <div id="text">
+        Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.
+      </div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+body {
+  background-color: #0a0a23;
+}
+
+#text {
+  background-color: #0a0a23;
+  color: #ffffff;
+  padding: 10px;
+}
+
+#game {
+  max-width: 500px;
+  max-height: 400px;
+  background-color: #ffffff;
+  color: #ffffff;
+  margin: 30px auto 0px;
+  padding: 10px;
+}
+
+#controls,
+#stats {
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #0a0a23;
+}
+
+#monsterStats {
+  display: none;
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #ffffff;
+  background-color: #c70d0d;
+}
+
+.stat {
+  padding-right: 10px;
+}
+
+button {
+  cursor: pointer;
+  color: #0a0a23;
+  background-color: #feac32;
+  background-image: linear-gradient(#fecc4c, #ffac33);
+  border: 3px solid #feac32;
+}
+```
+
+```js
+let xp = 0;
+let health = 100;
+let gold = 50;
+let currentWeapon = 0;
+let fighting;
+let monsterHealth;
+let inventory = ["stick"];
+
+const button1 = document.querySelector('#button1');
+const button2 = document.querySelector("#button2");
+const button3 = document.querySelector("#button3");
+const text = document.querySelector("#text");
+const xpText = document.querySelector("#xpText");
+const healthText = document.querySelector("#healthText");
+const goldText = document.querySelector("#goldText");
+const monsterStats = document.querySelector("#monsterStats");
+const monsterName = document.querySelector("#monsterName");
+const monsterHealthText = document.querySelector("#monsterHealth");
+const weapons = [
+  { name: 'stick', power: 5 },
+  { name: 'dagger', power: 30 },
+  { name: 'claw hammer', power: 50 },
+  { name: 'sword', power: 100 }
+];
+const monsters = [
+  {
+    name: "slime",
+    level: 2,
+    health: 15
+  },
+  {
+    name: "fanged beast",
+    level: 8,
+    health: 60
+  },
+  {
+    name: "dragon",
+    level: 20,
+    health: 300
+  }
+]
+const locations = [
+  {
+    name: "town square",
+    "button text": ["Go to store", "Go to cave", "Fight dragon"],
+    "button functions": [goStore, goCave, fightDragon],
+    text: "You are in the town square. You see a sign that says \"Store\"."
+  },
+  {
+    name: "store",
+    "button text": ["Buy 10 health (10 gold)", "Buy weapon (30 gold)", "Go to town square"],
+    "button functions": [buyHealth, buyWeapon, goTown],
+    text: "You enter the store."
+  },
+  {
+    name: "cave",
+    "button text": ["Fight slime", "Fight fanged beast", "Go to town square"],
+    "button functions": [fightSlime, fightBeast, goTown],
+    text: "You enter the cave. You see some monsters."
+  },
+  {
+    name: "fight",
+    "button text": ["Attack", "Dodge", "Run"],
+    "button functions": [attack, dodge, goTown],
+    text: "You are fighting a monster."
+  },
+  {
+    name: "kill monster",
+    "button text": ["Go to town square", "Go to town square", "Go to town square"],
+    "button functions": [goTown, goTown, goTown],
+    text: 'The monster screams "Arg!" as it dies. You gain experience points and find gold.'
+  },
+  {
+    name: "lose",
+    "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
+    "button functions": [restart, restart, restart],
+    text: "You die. &#x2620;"
+  }
+
+];
+
+// initialize buttons
+button1.onclick = goStore;
+button2.onclick = goCave;
+button3.onclick = fightDragon;
+
+function update(location) {
+  --fcc-editable-region--
+  monsterStats.style.display = "none";
+  button1.innerText = location["button text"][0];
+  button2.innerText = location["button text"][1];
+  button3.innerText = location["button text"][2];
+  button1.onclick = location["button functions"][0];
+  button2.onclick = location["button functions"][1];
+  button3.onclick = location["button functions"][2];
+  text.innerText = location.text;
+  --fcc-editable-region--
+}
+
+function goTown() {
+  update(locations[0]);
+}
+
+function goStore() {
+  update(locations[1]);
+}
+
+function goCave() {
+  update(locations[2]);
+}
+
+function buyHealth() {
+  if (gold >= 10) {
+    gold -= 10;
+    health += 10;
+    goldText.innerText = gold;
+    healthText.innerText = health;
+  } else {
+    text.innerText = "You do not have enough gold to buy health.";
+  }
+}
+
+function buyWeapon() {
+  if (currentWeapon < weapons.length - 1) {
+    if (gold >= 30) {
+      gold -= 30;
+      currentWeapon++;
+      goldText.innerText = gold;
+      let newWeapon = weapons[currentWeapon].name;
+      text.innerText = "You now have a " + newWeapon + ".";
+      inventory.push(newWeapon);
+      text.innerText += " In your inventory you have: " + inventory;
+    } else {
+      text.innerText = "You do not have enough gold to buy a weapon.";
+    }
+  } else {
+    text.innerText = "You already have the most powerful weapon!";
+    button2.innerText = "Sell weapon for 15 gold";
+    button2.onclick = sellWeapon;
+  }
+}
+
+function sellWeapon() {
+  if (inventory.length > 1) {
+    gold += 15;
+    goldText.innerText = gold;
+    let currentWeapon = inventory.shift();
+    text.innerText = "You sold a " + currentWeapon + ".";
+    text.innerText += " In your inventory you have: " + inventory;
+  } else {
+    text.innerText = "Don't sell your only weapon!";
+  }
+}
+
+function fightSlime() {
+  fighting = 0;
+  goFight();
+}
+
+function fightBeast() {
+  fighting = 1;
+  goFight();
+}
+
+function fightDragon() {
+  fighting = 2;
+  goFight();
+}
+
+function goFight() {
+  update(locations[3]);
+  monsterHealth = monsters[fighting].health;
+  monsterStats.style.display = "block";
+  monsterName.innerText = monsters[fighting].name;
+  monsterHealthText.innerText = monsterHealth;
+}
+
+function attack() {
+  text.innerText = "The " + monsters[fighting].name + " attacks.";
+  text.innerText += " You attack it with your " + weapons[currentWeapon].name + ".";
+  health -= monsters[fighting].level;
+  monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1;
+  healthText.innerText = health;
+  monsterHealthText.innerText = monsterHealth;
+   if (health <= 0) {
+    lose();
+  } else if (monsterHealth <= 0) {
+    if (fighting === 2) {
+      winGame();
+    } else {
+      defeatMonster();
+    }
+  }
+}
+
+function dodge() {
+  text.innerText = "You dodge the attack from the " + monsters[fighting].name;
+}
+
+function defeatMonster() {
+  gold += Math.floor(monsters[fighting].level * 6.7);
+  xp += monsters[fighting].level;
+  goldText.innerText = gold;
+  xpText.innerText = xp;
+  update(locations[4]);
+}
+
+function lose() {
+  update(locations[5]);
+}
+
+function restart() {
+  xp = 0;
+  health = 100;
+  gold = 50;
+  currentWeapon = 0;
+  inventory = ["stick"];
+  goldText.innerText = gold;
+  healthText.innerText = health;
+  xpText.innerText = xp;
+  goTown();
+}
+```
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
index 566f107a222..19880f56efe 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
@@ -22,21 +22,21 @@ You should use bracket notation to access the property of `totalCountPerProduct`
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 You should use the assignment operator to update the value of the property of `totalCountPerProduct` that corresponds to `dessert.id`.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=/);
 ```
 
 You should update the value of `totalCountPerProduct` to be the current value plus one.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\+\s*1/);
 ```
 
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
index d19581fe174..ac6ba80e6f0 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
@@ -17,28 +17,28 @@ You should wrap your right-hand `totalCountPerProduct[dessert.id]` in parenthese
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 You should use the `||` operator.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*/);
 ```
 
 You should use `0` as your fallback value.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
 ```
 
 You should still add `1` to the value.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
index 9b1c444e447..6ff3c82a6c2 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
@@ -29,7 +29,7 @@ You should assign the value of `totalCountPerProduct[product.id]` to `currentPro
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\[product\.id\]/);
+assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\s*\[\s*product\.id\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
index 3acfc9e88b4..8c91b5862e3 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
@@ -32,7 +32,7 @@ assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*
 You should add an empty callback function to the event listener. Remember to give it an `event` parameter.
 
 ```js
-assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*\s*\}\s*\)/);
+assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*;?\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
index 89744b1e268..7d76957ce74 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
@@ -53,7 +53,7 @@ Your `reduce` call should have an initial value of `0`.
 
 ```js
 const afterCalculateTotal = code.split('calculateTotal')[1];
-assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(total,\s*item\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
+assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(\s*total,\s*item\s*\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
index 39c4e7f2036..b1a651dea25 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
@@ -37,7 +37,6 @@ assert.match(afterCalculateTaxes, /amount\s*\*\s*\(\s*this\s*\.\s*taxRate\s*\/\s
 Your `calculateTaxes` method should return the value of the `taxRate` (divided by 100, to convert it to a percent) multiplied by the `amount` parameter.
 
 ```js
-console.log(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 assert.equal(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
index d976249630b..aa4fb85569d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
@@ -19,37 +19,37 @@ Start by accessing the `#playlist-songs`, `#play`, and `#pause` elements with th
 You should use `document.getElementById()` to get the `#playlist-songs` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should assign the `#playlist-songs` element to the variable `playlistSongs`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#play` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should assign the `#play` element to the variable `playButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#pause` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 You should assign the `#pause` element to the variable `pauseButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
index 70959a9bc71..42cae335589 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
@@ -16,37 +16,37 @@ Assign them to variables named `nextButton`, `previousButton`, and `shuffleButto
 You should use `document.getElementById()` to get the `#next` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should assign the `#next` element to the variable `nextButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#previous` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should assign the `#previous` element to the variable `previousButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#shuffle` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 You should assign the `#shuffle` element to the variable `shuffleButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
index 13768506d8f..b474acaae70 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
@@ -18,13 +18,13 @@ Use `const` to create a variable named `audio` and set it equal to `new Audio()`
 You should use the `new` keyword to create an instance of the `Audio` object.
 
 ```js
-assert.match(code, /new\s+Audio\(\);?/)
+assert.match(code, /new\s+Audio\(\s*\);?/)
 ```
 
 You should assign the `Audio` object to a constant named `audio`.
 
 ```js
-assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\);?/)
+assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
index f213c4dae99..8f81327b79d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
@@ -34,7 +34,7 @@ assert.match(code, /userData\?\.songs\.find\(/)
 Your `find` method should have `song` as the parameter of its arrow function callback.
 
 ```js
-assert.match(code, /userData\?\.songs\.find\(\(?song\)?/)
+assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 Your `find` method should use strict equality to check if `song.id` is equal to `id`.
@@ -46,7 +46,7 @@ assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(so
 Your `find` method should be assigned to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\);?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
index bf9d8bb5e1a..93a9efd6c5a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
@@ -13,22 +13,22 @@ Also, set the `audio.title` property equal to `song.title`. This tells the audio
 
 # --hints--
 
-You should not modify the exist `playSong` function and its content.
+You should not modify the existing `playSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?/)
 ```
 
 You should set `audio.src` to `song.src`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?/)
 ```
 
 You should set `audio.title` to `song.title`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
index 55f05057462..ecaec6a4ed0 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
@@ -17,13 +17,13 @@ Add an `if` statement to check whether the `userData?.currentSong` is `null` or
 You should create an `if` statement with the condition `userData?.currentSong === null || userData?.currentSong.id !== song.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*/)
 ```
 
 You should set `audio.currentTime` to `0` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
index 40cdfe610c0..2d49a72340c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
@@ -11,9 +11,11 @@ You need to update the current song being played as well as the appearance of th
 
 Start by accessing the `userData` object and its `currentSong` property. Set its value equal to the `song` variable.
 
+*Note*: You should not use the optional chaining operator `?.` in this step because `userData.currentSong` will not be `null` or `undefined` at this point.
+
 # --hints--
 
-You should set `userData.currentSong` to `song`.
+You should assign `song` to `userData.currentSong`.
 
 ```js
 assert.match(code, /userData\.currentSong\s*=\s*song;?/)
@@ -614,7 +616,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   --fcc-editable-region--
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
index 5edb3e0dc0c..8e3aee551ca 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
@@ -7,9 +7,9 @@ dashedName: step-33
 
 # --description--
 
-You need to hook up the `playSong` function to a `click` event listener so the songs will start playing when the play button is clicked.
+In previous steps you built out the functionality for playing a song. Now you need to add the functionality to the play button so that it will play the current song when it is clicked on.
 
-Add a click event listener to the `playButton` element, then use arrow syntax to pass in a callback with an empty pair of curly braces.
+Use the `addEventListener()` method and pass in a `click` event for the first argument and an empty callback function with arrow syntax for the second argument, e.g., `() => {}`.
 
 # --hints--
 
@@ -22,13 +22,13 @@ assert.match(code, /playButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback into your event listener. Don't forget you also need an empty pair of curly braces.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
index 55154f1ac35..5dd6e2d4433 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+songsHTML/);
 You should assign `array.map()` to your `songsHTML`.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\)/);
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
index 956d96f54de..9a10b9dc705 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
@@ -32,7 +32,7 @@ assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\
 You should interpolate `song.title` as the content of your `span` element.
 
 ```js
-assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\$\{song\.title\}\s*<\/span>\s*<\/button>/)
+assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\s*\$\{\s*song\.title\s*\}\s*<\/span>\s*<\/button>/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
index 1e9d4110603..250d38aa699 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
@@ -24,7 +24,7 @@ assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*/)
 Your button element should have an `aria-label` attribute with the value `Delete ${song.title}` as its second attribute and value.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2\s*>/)
 ```
 
 You should paste in the provided `svg` as the content of your `button` element.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
index a3ce8a0a436..307da9d90bc 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
@@ -24,7 +24,7 @@ Chain the `join()` method to your `map()` method and pass in an empty string for
 You should add `join("")` to the existing code.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\)\s*\.join\(('|")\3\);?/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\s*\)\s*\.join\(\s*('|")\3\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
index ebf48e94603..790ba36263a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
@@ -35,7 +35,7 @@ Call the `renderSongs` function with the `songs` property of `userData`. This wi
 You should call your `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /renderSongs\(userData\?\.songs\)/)
+assert.match(code, /renderSongs\(\s*userData\?\.songs\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
index 91038ef5fed..7d59f81f8f8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
@@ -9,20 +9,20 @@ dashedName: step-34
 
 Within the arrow function of the event listener, add an `if` to check if `userData?.currentSong` is `null`.
 
-Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData.songs` array. This will ensure the first song in the playlist is played first.
+Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData?.songs` array. This will ensure the first song in the playlist is played first.
 
 # --hints--
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
index 6a1dc7a123f..a68fb68b52a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
@@ -16,20 +16,20 @@ This ensures that the currently playing song will continue to play when the play
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` block to your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.currentSong.id` in the `else` block of your `if` statement.
 
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*playSong\(userData\?\.currentSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*playSong\(\s*userData\?\.currentSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -627,7 +627,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
index ff69c48c857..53f0eb2a0ba 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
@@ -28,13 +28,13 @@ assert.isFunction(pauseSong)
 Your `pauseSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `pauseSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
index 08745a62f32..7e8c1e876ae 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
@@ -9,15 +9,17 @@ dashedName: step-38
 
 To store the current time of the song when it is paused, set the `songCurrentTime` of the `userData` object to the `currentTime` of the `audio` variable.
 
+*Note*: You should not use optional chaining for this step because `userData.songCurrentTime` will not be `null` or `undefined` at this point.
+
 # --hints--
 
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
-You should set `userData.songCurrentTime` to `audio.currentTime`.
+You should assign `audio.currentTime` to `userData.songCurrentTime`.
 
 ```js
 assert.match(code, /userData\.songCurrentTime\s*=\s*audio\.currentTime;?/)
@@ -618,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
index 89e24cf6e7f..1371190ea32 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
@@ -16,19 +16,19 @@ To finally pause the song, use the `pause()` method on the `audio` variable. `pa
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `classList` property and the `remove()` method to remove the class `playing` from the `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.remove\(('|")playing\1\);?/)
+assert.match(code, /playButton\.classList\.remove\(\s*('|")playing\1\s*\);?/)
 ```
 
 You should use the `pause()` method on your `audio` variable.
 
 ```js
-assert.match(code, /audio\.pause\(\)/)
+assert.match(code, /audio\.pause\(\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
index 388a3e67bc8..d316942ebab 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
@@ -22,13 +22,13 @@ assert.match(code, /pauseButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `pauseSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1,\s*pauseSong\)/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1,\s*pauseSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
index 940339c6286..9ee1aa3a344 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
@@ -16,13 +16,13 @@ To finally play the song, use the `play()` method on the `audio` variable. `play
 You should use the `classList` property and the `add` method to add the class `playing` to `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.add\(("|')playing\1\);?/)
+assert.match(code, /playButton\.classList\.add\(\s*("|')playing\1\s*\);?/)
 ```
 
 You should use the `play()` method on the `audio` variable.
 
 ```js
-assert.match(code, /audio\.play\(\);?/)
+assert.match(code, /audio\.play\(\s*\);?/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
 
   userData.currentSong = song;
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
index 0835ebdd25f..036ea276c7e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
@@ -28,13 +28,13 @@ assert.isFunction(playNextSong)
 Your `playNextSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playNextSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
index df365f2e3f6..c5f96045be7 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
@@ -9,30 +9,30 @@ dashedName: step-44
 
 Inside the `playNextSong` function, create an `if` statement to check if the `currentSong` of `userData` is strictly equal to `null`. This will check if there's no current song playing in the `userData` object.
 
-If the condition is true, call the `playSong` function with the `id` of the first song in the `userData.songs` array as an argument.
+If the condition is true, call the `playSong` function with the `id` of the first song in the `userData?.songs` array as an argument.
 
 # --hints--
 
 You should not modify the existing `playNextSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside the `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
index 50860c0b419..f46387c1e85 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
@@ -14,25 +14,25 @@ Add an `else` block to the `if` statement. Inside the `else` block, call the `ge
 You should not modify the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` to the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 You should set the `currentSongIndex` constant to `getCurrentSongIndex()` inside the `else` block.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*\}/)
 ```
 
 
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -678,7 +678,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
index ba4e845811d..25e33e058de 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
@@ -18,25 +18,25 @@ Lastly, call the `playSong` function and pass in `nextSong.id` as the argument.
 You should not modify the existing `if` statement, its `else` block, and content.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex + 1]` to a `nextSong` constant.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `nextSong.id`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*playSong\(nextSong\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*playSong\(\s*nextSong\.id\s*\);?\s*\}/)
 ```
 
 
@@ -635,7 +635,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
index c1b6d1253ba..988cc596b6e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
@@ -22,13 +22,13 @@ assert.match(code, /nextButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playNextSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1,\s*playNextSong\)/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1,\s*playNextSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -675,7 +675,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
index ea2351e197c..fe01bd889c4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
@@ -26,13 +26,13 @@ assert.isFunction(playPreviousSong)
 Your `playPreviousSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playPreviousSong` function should be empty.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
index 9e7553353a9..b5368400916 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
@@ -16,31 +16,31 @@ Inside the `else` block, create a constant named `currentSongIndex` and assign i
 You should not alter the existing `playPreviousSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should have an `if` statement with the condition `userData?.currentSong === null` inside your `playPreviousSong` function.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*/)
 ```
 
 You should have `return` inside the block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
 ```
 
 You should call `getCurrentSongIndex` and assign it to `currentSongIndex` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -695,7 +695,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
index 9909064456d..fe3c4b48609 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
@@ -14,19 +14,19 @@ To get the previous song, subtract `1` from the `currentSongIndex` of `userData?
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex - 1]` to a `previousSong` constant.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `previousSong.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*playSong\(previousSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*playSong\(\s*previousSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
index ba540c47f09..796d604ed45 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
@@ -20,13 +20,13 @@ assert.match(code, /previousButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playPreviousSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1,\s*playPreviousSong\)/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1,\s*playPreviousSong\s*\)/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
index 03ef9faa9ca..a96edb4100b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
@@ -28,19 +28,19 @@ assert.isFunction(highlightCurrentSong)
 Your `highlightCurrentSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*/)
 ```
 
 You should create a `playlistSongElements` constant inside your `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
 ```
 
 You should use the `querySelectorAll()` method to select the `.playlist-song` element and assign it to the `playlistSongElements` constant.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*\};?/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
index 686f94a41a0..0c5e5823450 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
@@ -22,7 +22,7 @@ assert.isFunction(getCurrentSongIndex);
 Your `getCurrentSongIndex` function should use arrow syntax.
 
 ```js
-assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\)\s*=>\s*{\s*}\s*/);
+assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*/);
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
index c209b5e90ae..9446fe6ade3 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
@@ -16,7 +16,7 @@ Use `getElementById()` to get the `id` of the currently playing song, then use t
 You should not modify the existing `highlightCurrentSong` function and its content.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*/)
 ```
 
 You should use `document.getElementById()` and pass in `` `song-${userData?.currentSong?.id}` ``.
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -692,7 +692,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
index f3aa314ba2e..cc84846ea99 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
@@ -33,13 +33,13 @@ assert.match(code, /playlistSongElements\.forEach\(/)
 Your `forEach()` method should have a `songEl` parameter and use arrow syntax.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*/)
 ```
 
 Your `forEach` should have an empty pair of curly braces.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -637,7 +637,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
index abf90ec36c1..c9e12cded75 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
@@ -16,19 +16,19 @@ Create an `if` statement with the condition `songToHighlight`. For the statement
 You should create an `if` statement with the condition `songToHighlight`.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*/)
 ```
 
 You should use the `setAttribute()` method on `songToHighlight` inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(/)
 ```
 
 You should pass in `"aria-current"` and `"true"` as the first and second argument of your `setAttribute` method.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\)\s*;?\s*\}?/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\s*\)\s*;?\s*\}?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
index 2f09ebcc9f0..8950840f6cb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
@@ -16,7 +16,7 @@ After that, play around with the control buttons to see how the `highlightCurren
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /highlightCurrentSong\(\)/)
+assert.match(code, /highlightCurrentSong\(\s*\)/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -688,7 +688,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
index 6b69e685f50..809e8e60900 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
@@ -26,13 +26,13 @@ assert.isFunction(setPlayerDisplay)
 Your `setPlayerDisplay` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayerDisplay` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
index 9f919ae448f..38b5b47a325 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
@@ -16,31 +16,31 @@ Access the `#player-song-title` and `#player-song-artist` elements with the `get
 You should not modify the existing `setPlayerDisplay` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use `document.getElementById()` to get the `#player-song-title` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should assign the `#player-song-title` element to the variable `playingSong`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should use `document.getElementById()` to get the `#player-song-artist` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 You should assign the `#player-song-artist` element to the variable `songArtist`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -716,7 +716,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
index 04e384c803d..26db9e77706 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -710,7 +710,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
index bc0881e0b41..30fe5589657 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -725,7 +725,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
index 086364256b7..39860a3369c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
@@ -16,7 +16,7 @@ Now you should see the song title and the artist show up in the display.
 You should call the `setPlayerDisplay` function inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayerDisplay\(\);?/)
+assert.match(code, /setPlayerDisplay\(\s*\);?/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
index ddc499adfb0..08556aa44e4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
@@ -28,13 +28,13 @@ assert.isFunction(setPlayButtonAccessibleText)
 Your `setPlayButtonAccessibleText` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayButtonAccessibleText` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -719,7 +719,7 @@ const renderSongs = (array) => {
 
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
index eeab985de03..977089f616f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
@@ -16,19 +16,19 @@ Don't forget to use optional chaining.
 You should not modify the existing `setPlayButtonAccessibleText` and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should access `userData?.currentSong` or `userData?.songs[0]`.
 
 ```js
-assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 You should assign `userData?.currentSong || userData?.songs[0]` to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -715,7 +715,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
index 2e8c921b634..4d71c40da0f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
@@ -16,7 +16,7 @@ Don't forget you need template interpolation here, so you need to use backticks.
 You should not modify the existing `setPlayButtonAccessibleText` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `setAttribute()` method on `playButton`.
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
index 653c92cc68b..519d8416499 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
@@ -14,7 +14,7 @@ Now, call the `setPlayButtonAccessibleText` function inside the `playSong` funct
 You should call the `setPlayButtonAccessibleText` inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayButtonAccessibleText\(\);?/)
+assert.match(code, /setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -707,7 +707,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
index 60c8bc2ddcd..2a8991817cc 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
@@ -28,13 +28,13 @@ assert.isFunction(shuffle)
 Your `shuffle` function should use an arrow syntax and should not take a parameter.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `shuffle` function  should be empty.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -729,7 +729,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
index b6a722fe8ab..22d3a566646 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
@@ -24,7 +24,7 @@ Use the `sort()` method on the `userData?.songs` array. Pass a callback to the m
 You should not modify the existing `shuffle` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*{\s*[\s\S]*?\};?/);
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*{\s*[\s\S]*?\};?/);
 ```
 
 You should use the `sort()` method on `userData?.songs`.
@@ -42,7 +42,7 @@ assert.match(code, /userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*/)
 The callback of your `sort()` method should return `Math.random() - 0.5`.
 
 ```js
-assert.match(code, /userData\?.songs\.sort\s*\(\(\)\s*=>(\s*{\s*return\s+Math\.random\(\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\)\s*-\s*0\.5\s*)\);?/);
+assert.match(code, /userData\?.songs\.sort\s*\(\s*\(\s*\)\s*=>(\s*{\s*return\s+Math\.random\(\s*\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\s*\)\s*-\s*0\.5\s*)\s*\);?/);
 ```
 
 # --seed--
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -739,7 +739,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
index c0979505bcf..a4ea7195345 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
@@ -11,6 +11,8 @@ When the shuffle button is pressed, you want to set the `currentSong` to nothing
 
 Set `userData.currentSong` to `null` and `userData.songCurrentTime` to `0`.
 
+*Note*: You should not use optional chaining for this step because you are explicitly setting the `currentSong` and `songCurrentTime` properties to be `null` and `0` respectively.
+
 # --hints--
 
 You should set `userData.currentSong` to `null`.
@@ -620,7 +622,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -720,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
index e999593b904..8569e46961d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
@@ -16,31 +16,31 @@ Call the `renderSongs` function and pass in `userData?.songs` as an argument. Al
 You should not modify the existing `shuffle` function and its content.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -741,7 +741,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
index 39ac6f2d8c0..39a59d1f38b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
@@ -22,13 +22,13 @@ assert.match(code, /shuffleButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 You should pass in `shuffle` as the second value of your `click` event listener.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1,\s*shuffle\);?/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1,\s*shuffle\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
index 040cee0acfd..097fcd6e207 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -746,7 +746,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
index 7d4193313fd..b4bd4f3a943 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
@@ -7,7 +7,7 @@ dashedName: step-73
 
 # --description--
 
-Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData.songs` array.
+Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData?.songs` array.
 
 The `filter` method keeps only the elements of an array that satisfy the callback function passed to it:
 
@@ -20,12 +20,14 @@ console.log(numsGreaterThanThree) // Output: [10, 8, 4, 5]
 
 Use the `filter()` method on `userData?.songs`. Pass in `song` as the parameter of the arrow function callback and use implicit return to check if `song.id` is strictly not equal to `id`. Assign all of that to the `userData.songs`.
 
+*Note*: You should not use optional chaining when you assign the result of  `userData?.songs.filter` to `userData.songs` because the `allSongs` array will not be `undefined` or `null` at that point.
+
 # --hints--
 
 You should not modify the existing `deleteSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should use the `filter()` method on `userData?.songs`.
@@ -647,7 +649,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -757,7 +759,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
index c3aa2bdfa26..70751fa233d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
@@ -18,25 +18,25 @@ After that, call the `highlightCurrentSong` function to highlight the current so
 You should not modify the existing `deleteSong` function and its content.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -634,7 +634,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -745,7 +745,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
index 6b3a48bc63f..965c51a7ccd 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
@@ -16,7 +16,7 @@ Use an `if` statement to check if the `userData?.currentSong?.id` is equal to th
 You should create an empty `if` statement with the condition `userData?.currentSong?.id === id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
index 0af99ba5aab..62c62101497 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
@@ -16,31 +16,31 @@ After that, call the `pauseSong()` function to stop the playback and the `setPla
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.currentSong` to `null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.songCurrentTime` to `0`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*.*\s*\}/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -755,7 +755,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
index a41c2ded81a..e26f6ca3771 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
@@ -9,14 +9,14 @@ dashedName: step-78
 
 Next, you need to check if the playlist is empty. If it is, you should reset the `userData` object to its original state.
 
-Use an `if` statement to check if the `userData.songs` has a length of `0`.
+Use an `if` statement to check if the `userData?.songs` has a length of `0`.
 
 # --hints--
 
-You should create an empty `if` statement with the condition `userData.songs.length === 0`
+You should create an empty `if` statement with the condition `userData?.songs.length === 0`.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -738,7 +738,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
index 481f9e2549d..019142d3e7b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
@@ -33,19 +33,19 @@ Inside your `if` statement, declare a `resetButton` constant, then use `createEl
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*.*\s*\}/)
 ```
 
 You should use the `createElement` method to create a `button`.
 
 ```js
-assert.match(code, /document\.createElement\(('|")button\1\);?/)
+assert.match(code, /document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 You should assign your newly created `button` element to a `resetButton` constant.
 
 ```js
-assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?/)
+assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 # --seed--
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -708,7 +708,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
 
   }
 --fcc-editable-region--
@@ -769,7 +769,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
index cae5f13a4be..38132ec8916 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
@@ -18,7 +18,7 @@ Set the `id` attribute of `resetButton` to `reset` and its `aria-label` attribut
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should use `resetButton.id` to create an `id` attribute named `reset` for the `resetButton`.
@@ -628,7 +628,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
index e261f454cef..f039ae2aeae 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
@@ -32,7 +32,7 @@ assert.match(code, /resetButton\.appendChild\(/)
 You should pass in `resetText` as the value of your first `appendChild()`.
 
 ```js
-assert.match(code, /resetButton\.appendChild\(resetText\);?/)
+assert.match(code, /resetButton\.appendChild\(\s*resetText\s*\);?/)
 ```
 
 You should use the `appendChild()` method on `playlistSongs`.
@@ -44,7 +44,7 @@ assert.match(code, /playlistSongs\.appendChild\(/)
 You should pass in `resetButton` as the value of your second `appendChild()`.
 
 ```js
-assert.match(code, /playlistSongs\.appendChild\(resetButton\);?/)
+assert.match(code, /playlistSongs\.appendChild\(\s*resetButton\s*\);?/)
 ```
 
 # --seed--
@@ -642,7 +642,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -773,7 +773,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
index a0527666a6d..1f4acc62c85 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
@@ -22,13 +22,13 @@ assert.match(code, /resetButton\.addEventListener\(/)
 Your `resetButton` event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 The callback function of your event listener should use arrow syntax and have an empty pair of curly braces.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -690,7 +690,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -760,7 +760,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
index eeae4e42d82..da79c6b4fc0 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
@@ -7,22 +7,22 @@ dashedName: step-84
 
 # --description--
 
-You need to assign the `userData.songs` property to the initial `allSongs` array. This will reset the playlist to its original state.
+To reset the playlist to its original state, spread `allSongs` into an array and assign it to `userData.songs`.
 
-Spread `allSongs` into an array and assign it to `userData.songs`.
+*Note*: You should not use optional chaining for the `userData.songs` because the song will not be `null` or `undefined` at this point.
 
 # --hints--
 
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\s*\);?/)
 ```
 
 You should assign `[...allSongs]` to `userData.songs`.
 
 ```js
-assert.match(code, /userData\.songs\s*=\s*\[\.\.\.allSongs\]/)
+assert.match(code, /userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -684,7 +684,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
index 45c2af76df7..54ecfd360c2 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
@@ -22,25 +22,25 @@ Remove the reset button from the playlist by calling the `remove()` method on th
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*.*\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*.*\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
 You should use the `remove()` method to remove the `resetButton` from the DOM.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*resetButton\.remove\(\);?\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*resetButton\.remove\(\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -702,7 +702,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -776,7 +776,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
index c60a529308b..059168e753f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
@@ -24,13 +24,13 @@ assert.match(code, /audio\.addEventListener\(/)
 The event listener you used on on your `audio` variable should listen for an `ended` event.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback to your `ended` event listener.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 
@@ -629,7 +629,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -768,7 +768,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
index a5231085c9b..441d3262c9b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
@@ -7,14 +7,14 @@ dashedName: step-77
 
 # --description--
 
-Within the button element in the `renderSongs` function, add an `onclick` attribute as the first attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
+Within the button element in the `renderSongs` function, add an `onclick` attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
 
 # --hints--
 
-You should add an `onclick` attribute as the first attribute of the delete button and pass in `deleteSong(${song.id})`.
+You should add an `onclick` attribute to the delete button and pass in `deleteSong(${song.id})`.
 
 ```js
-assert.match(code, /<button\s+onclick=('|")deleteSong\(\$\{song\.id\}\)\1\s*class=('|")playlist-song-delete\2\s*aria-label=('|")Delete\s*\$\{song\.title\}\3\s*>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")deleteSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
index e71e627e220..1f03383e934 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
@@ -7,30 +7,35 @@ dashedName: step-87
 
 # --description--
 
-Notice that the album art in the HTML and songs in the `allSongs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
+Notice that the album art in the HTML and songs in the `userData.songs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
 
 Next, you need to check if there is a next song to play. Retrieve the current song index by calling the `getCurrentSongIndex()` function, and save it in a `currentSongIndex` constant.
 
-After that, create a `nextSongExists` constant that checks if a next song exists.
+After that, create a `nextSongExists` constant that contains the boolean value `true` or `false` depending on if the next song exists.
 
 # --hints--
 
 You should not modify the existing `ended` event listener and its content.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should create a `currentSongIndex` constant and set it to the calling of the `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
-You should check if a next song exists with `userData?.songs[currentSongIndex + 1] !== undefined` and set it to a `nextSongExists` constant.
+You should check if a next song exists comparing `userData.songs.length` and `currentSongIndex` and set it to a `nextSongExists` constant. If the last index of the songs array (`userData.songs.length - 1`) is bigger than the currentSongIndex that means there is a next song.
 
 ```js
-assert.match(code, /const\s+nextSongExists\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\]\s*!==\s*undefined;?/)
+const secondPart = code.split(`audio.addEventListener("ended", () => {`)[1];
+const middlePart = secondPart.split("});")[0]
+const codeOutputFirstTest = eval(middlePart + "\nnextSongExists;");
+assert.strictEqual(codeOutputFirstTest, true);
+const codeOutputSecondTest = eval(`\nfunction getCurrentSongIndex() { return 100; };\n` + middlePart + "\nnextSongExists;")
+assert.strictEqual(codeOutputSecondTest, false);
 ```
 
 # --seed--
@@ -593,7 +598,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -657,7 +662,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -732,7 +737,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
index 4ba0d1f1514..9bc6e64563d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
@@ -14,13 +14,13 @@ Use an `if` statement to check if `nextSongExists` exists, then call the `playNe
 You should create an `if` statement with the condition `nextSongExists`.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*/)
 ```
 
 You should call the `playNextSong` function inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -583,7 +583,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -647,7 +647,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
index 4e4f0aa3b11..fa0279511ac 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
@@ -14,25 +14,25 @@ If there is no next song in the playlist, use the `else` block to reset the `cur
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `currentSong` property of `userData` to `null` in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `songCurrentTime` property of `userData` to `0` in the `else` block of your `if`statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
 ```
 
 # --seed--
@@ -595,7 +595,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -659,7 +659,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
index 4cb322cf018..61335417b5d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
@@ -17,28 +17,28 @@ You should call the `pauseSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /pauseSong\(\);?/)
+assert.match(splitter[1], /pauseSong\(\s*\);?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /setPlayerDisplay\(\);?/)
+assert.match(splitter[1], /setPlayerDisplay\(\s*\);?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -636,7 +636,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -775,7 +775,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
@@ -1418,7 +1418,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -1482,7 +1482,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -1557,7 +1557,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
index bcfef9ca3b5..9ab920152d1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
@@ -26,7 +26,7 @@ Inside the `userData` object create a `songs` property. For the value, spread `a
 Your `userData` object should have a `songs` key set to `[...allSongs]`.
 
 ```js
-assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\],?/);
+assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\]\s*,?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
index e2386f6712b..01c90b5dd6c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
@@ -14,7 +14,7 @@ To handle the current song's information and track its playback time, create a `
 You should not modify the existing `userData` object and its content.
 
 ```js
-assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\.\.\.allSongs\],?\s*/);
+assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\s*\.\.\.allSongs\s*\]\s*,?\s*/);
 ```
 
 Your `userData` object should have a `currentSong` key set to `null`.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
index b1a03b55aed..57bac97354b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
@@ -9,26 +9,26 @@ dashedName: step-30
 
 Add an `else` block to handle the current song's position in the playlist.
 
-Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData.songCurrentTime`.
+Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData?.songCurrentTime`.
 
 # --hints--
 
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 You should add an `else` block to the existing `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
 ```
 
-You should set `audio.currentTime` to `userData.songCurrentTime` inside the `else` block of your `if` statement.
+You should set `audio.currentTime` to `userData?.songCurrentTime` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\.songCurrentTime;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\?\.songCurrentTime;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
index 6efa055ca4c..298bb682cc7 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
@@ -20,7 +20,7 @@ assert.match(code, /playlistSongElements\.forEach\(\s*(\(\s*songEl\s*\)|songEl)\
 You should use the `removeAttribute()` method on `songEl` and pass in `"aria-current"`.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(('|")aria-current\1\);?\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(\s*('|")aria-current\1\s*\);?\s*\}\s*\);?/)
 ```
 
 
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -691,7 +691,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
index a179ff97c64..dfc7529147b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
@@ -13,10 +13,10 @@ Don't forget you need to interpolate with the dollar sign here.
 
 # --hints--
 
-You should add an `onclick` with the value `playSong(${song.id})` as the second attribute and value of the `button` element.
+You should add an `onclick` attribute with the value `playSong(${song.id})` to the `button` element.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-info\1\s*onclick\s*=\s*('|")playSong\(\$\{song\.id\}\)\2\s*>\s*<span\s+class\s*=\s*('|")playlist-song-title\3\s*>\$\{song\.title\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-artist\4\s*>\$\{song\.artist\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-duration\5\s*>\$\{song\.duration\}<\/span>\s*<\/button>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")playSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
index 99c4bbda3fe..0d8e013d40a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
@@ -28,19 +28,19 @@ Use the `createTextNode()` method to create a `Reset Playlist` text, then assign
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*\}/)
 ```
 
 You should use `document.createTextNode()` to create a `Reset Playlist` text.
 
 ```js
-assert.match(code, /document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 You should assign your created text node to a `resetText` constant.
 
 ```js
-assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -703,7 +703,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
 
 
@@ -766,7 +766,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
index 340dc88479e..4543edbc748 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
@@ -23,13 +23,13 @@ Pass in a callback function to the `map()` method. The callback function should
 The callback function of your `map()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?.*\)?\s*=>\s*\{\s*\}\)/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(.*\)|[^()]+)\s*=>\s*\{\s*\}\s*\)/)
 ```
 
 Your `map()` method should have a `song` parameter in it's callback function.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?song\)?/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
index 0676fa39a30..fd9987ea323 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
@@ -14,20 +14,20 @@ const animals = ["dog", "cat", "horse"];
 animals.indexOf("cat") // 1
 ```
 
-Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData.currentSong`.
+Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData?.currentSong`.
 
 # --hints--
 
 You should return `userData?.songs.indexOf()` inside your `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\()|(\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(|\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
 ```
 
-You should pass in `userData.currentSong` into the `indexOf()` method.
+You should pass in `userData?.currentSong` into the `indexOf()` method.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\(userData\.currentSong\);?)|(\s*{\s*return\s+userData\?\.songs\.indexOf\(userData\.currentSong\);?)/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?|\s*{\s*return\s+userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?\s*})/)
 ```
 
 # --seed--
@@ -625,7 +625,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
index 71b7a3c4031..d191564ae62 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
@@ -23,7 +23,7 @@ Add the `sort()` method to `userData?.songs`.
 You should add the `sort()` method to `userData?.songs`.
 
 ```js
-assert.match(code, /userData\?\.songs\.sort\(*.\);?/);
+assert.match(code, /userData\?\.songs\.sort\(.*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
index 9712f133fd8..d81075f8bfa 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
@@ -18,25 +18,25 @@ The variables will not change, so use `const` to declare them.
 You should use `document.getElementById()` to get the `#author-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 You should assign the `#author-container` element to the variable `authorContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#load-more-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 You should assign the `#load-more-btn` element to the variable `loadMoreBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
index 6d9f601db4f..333a2b30ad9 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
@@ -22,13 +22,13 @@ Make a `GET` request to this URL: `https://cdn.freecodecamp.org/curriculum/news-
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should not have a semi-colon after your `fetch` call.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
index f3c4b38c737..0bd1a45148b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
@@ -27,37 +27,37 @@ Again, don't terminate the code with a semi-colon yet.
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain the `.then()` method to your `fetch()` syntax
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(/)
 ```
 
 You should add a `res` parameter to your `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
 ```
 
 Your `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
 ```
 
 You should log the `res` parameter to the console so you can see the `Response` object.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
index 126c226b308..a20d770fb2b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
@@ -16,19 +16,19 @@ Remove `console.log(res)` and implicitly return `res.json()` instead.
 You should remove the `console.log(res)`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*console\.log\(res\)\)/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should implicitly return `res.json()` in your `.then()`.
 
 ```js
-assert.match(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\)/)
+assert.match(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\);/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\);/)
 ```
 
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
index 2be35fbf14c..95f1cc3fd6b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
@@ -17,7 +17,7 @@ Chain another `.then()` to the existing `.then()` method. This time, pass in `da
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Your first `.then()` should not have a semi-colon.
@@ -29,37 +29,37 @@ assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not not have semi-colon after it.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
index e0b967e611b..6ebf819a5f1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
@@ -18,67 +18,67 @@ Chain `.catch()` to the last `.then()`. Pass in a callback function with `err` a
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not have a semicolon.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\);/)
 ```
 
 You should chain the `.catch()` method to the second `.then()` you already have.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
 ```
 
 You should add an `err` parameter to your `.catch()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
 ```
 
 Your `.catch()` method should have an arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
 ```
 
 Your `.catch()` method should use `console.error()` to log `err` to the console with the text `` `There was an error: ${err}` ``. Don't forget to use backticks.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\)\s*;?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
index 9ea2254bf0d..b08332d00f0 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
@@ -48,7 +48,7 @@ assert.match(code, /let\s+authorDataArr/)
 You should set your `authorDataArr` variable to an empty array (`[]`).
 
 ```js
-assert.match(code, /let\s+authorDataArr\s*=\s*\[\];?/)
+assert.match(code, /let\s+authorDataArr\s*=\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
index f097ce41a15..f05642e442e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
@@ -14,7 +14,7 @@ Inside your `displayAuthors` function, chain `.forEach()` to `authors`.
 You should chain `.forEach()` to `authors`.
 
 ```js
-assert.match(code, /authors\.forEach\(\)/)
+assert.match(code, /authors\.forEach\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
index c3e4f164756..772c2626cbf 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
@@ -34,7 +34,7 @@ assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*/)
 Your callback function should be empty.
 
 ```js
-assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\)\s*=>\s*\{\s*\}\s*\);?/)
+assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
index 7dc38176412..be95441c2b2 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
@@ -16,7 +16,7 @@ First, remove your `console.log()` statement. Then, assign `data` to the `author
 You should remove the console log showing the `data`.
 
 ```js
-assert.notMatch(code, /console\.log\(data\);/)
+assert.notMatch(code, /console\.log\(\s*data\s*\);/)
 ```
 
 You should assign `data` to the `authorDataArr` variable
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
index 1ff4c557432..8f48989514a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
@@ -22,19 +22,19 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should have a console log with the text `Author Data Array:`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1/)
 ```
 
 You should use comma to separate your `Author Data Array:` text and `authorDataArr`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,/)
 ```
 
 `authorDataArr` should be the second argument of your console log statement.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
index 079b61037e0..7c498dc198e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
@@ -22,7 +22,7 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should remove the console log statement showing `authorDataArr`
 
 ```js
-assert.notMatch(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.notMatch(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 You should call your `displayAuthors` function.
@@ -34,19 +34,19 @@ assert.match(code, /displayAuthors\(/)
 You should call your `displayAuthors` function and pass in an argument of `authorDataArr.slice()`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first parameter of your `slice()` method should be `startingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second parameter of your `slice()` method should be `endingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\);?/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
index d22ad3dc189..903ac2a44f8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
@@ -34,13 +34,13 @@ assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*/)
 Your `fetchMoreAuthors` function should use arrow syntax.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `fetchMoreAuthors` function should be empty.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*\{\s*\}/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
index 3263d9ba889..8cdfdcfb754 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
@@ -24,21 +24,21 @@ You should call your `displayAuthors` function and pass in an argument of `autho
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first argument of your `slice()` method should be `startingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second argument of your `slice()` method should be `endingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\)/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
index 379b0506067..5132aa8a422 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
@@ -24,13 +24,13 @@ assert.match(code, /loadMoreBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 Your event listener should take `fetchMoreAuthors` as the function to run.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1,\s*fetchMoreAuthors\);?/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1,\s*fetchMoreAuthors\s*\);?/)
 ```
 
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
index f44c5c8529b..e074ea19bdf 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
@@ -24,13 +24,13 @@ assert.match(code, /if\s*\(/)
 Your `if` statement should take in `authorDataArr.length <= endingIndex` as its condition.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*/)
 ```
 
 Your `if` statement should be empty.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
index e846ebf07c9..d09f1e03555 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
@@ -28,22 +28,21 @@ assert.match(code, /<p\s*class=("|')bio\1>/);
 You should check if the length of the `bio` text is greater than `50`.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50/)
+assert.match(code, /<p\s*class=("|')bio\1>\s*\$\{\s*bio\.length\s*>\s*50/)
 ```
 
 If the `bio` text is greater than `50` characters, you should extract the first 50 characters with `slice()` and replace the rest with `...`. Don't forget that indexes are zero-based.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:/);
 ```
 
 If the `bio` text is less than 50 characters, use the `bio` text directly.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:\s*bio\s*\}<\/p>/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:\s*bio\s*\}\s*<\/p>/);
 ```
 
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
index c1e0eeb6809..992e1f42f91 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
@@ -16,7 +16,7 @@ Inside the `.catch()`, remove the `console.error()` and set the `innerHTML` of t
 You should remove your `console.error` and its text.
 
 ```js
-assert.notMatch(code, /console\.error\(`There\s+was\s+an\s+error:\s+\$\{err\}`\);/)
+assert.notMatch(code, /console\.error\(\s*`There\s+was\s+an\s+error:\s+\$\{err\}`\s*\);/)
 ```
 
 You should access the `innerHTML` of `authorContainer` and set it to a `p` element. Don't forget to surround the `p` element with a template literal.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
index 6319fd10b2d..e6ecc625ee0 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
@@ -96,19 +96,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
index 5e9e04973f5..5669e94596a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
@@ -120,19 +120,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
index 2e76933a65c..eb656fd1ecb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
@@ -111,19 +111,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
index 00eb81688c8..b2740e1c5e5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
index 69d75a58adc..cd90d1acfe4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
@@ -7,8 +7,9 @@ dashedName: step-5
 
 # --description--
 
-Now create a `fieldset` with an `id` set to `lunch`, and a corresponding `legend` and `div` element.
+Next, create a `fieldset` element with the `id` set to `lunch`.
 
+Within that element, create a `legend` element with the text `Lunch`, and an empty `div` with the `class` set to `input-container`.
 # --hints--
 
 You should create a second `fieldset` element in your `form`.
@@ -138,19 +139,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
index c29e7fc63f8..d286013fb5b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
index 35cf2a5e440..ec3508cae48 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
@@ -188,19 +188,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
index ec2c50f4ac0..9f4dff71b04 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
index 91c91e1b463..98e8b0ccf8f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
@@ -190,19 +190,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
index cead6b6210d..e08c64d7612 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
@@ -196,19 +196,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
index 59bd8fce0bc..6262092ac00 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
index 33295d043b4..ed7b791b7f8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
index 2e223db5600..fa9dca5b6fb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
index ae4ffa04801..b6682ababdb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
@@ -29,13 +29,13 @@ You should create a variable called `calorieCounter`.
 assert.isDefined(calorieCounter);
 ```
 
-You should use `document.getElementById()` to get the `#calorie-counter` element.
+You should have `document.getElementById('calorie-counter')` in your code.
 
 ```js
 assert.match(code, /document\.getElementById\(\s*('|")calorie-counter\1\s*\)/g);
 ```
 
-You should store the `#calorie-counter` element in a variable called `calorieCounter`.
+You should assign `document.getElementById('calorie-counter')` to your `calorieCounter` variable.
 
 ```js
 assert.equal(calorieCounter, document.getElementById('calorie-counter'));
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
index 40f6a3be31c..e922395a163 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
index a42336a5fdb..1261bcfafc3 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
index dad3e77d4d5..b4ad5d7c770 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
@@ -7,6 +7,13 @@ dashedName: step-17
 
 # --description--
 
+In programming, it is standard practice to prefix a variable with `is` or `has` to indicate that the variable is a boolean.
+
+```js
+let isRunning = true;
+let hasCompleted = false;
+```
+
 Declare an `isError` variable and set it to `false`, but use `let` so you can reassign it later.
 
 # --hints--
@@ -148,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
index 13e5c06526c..168096e614a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
@@ -28,7 +28,7 @@ assert.isFunction(cleanInputString);
 Your `cleanInputString` function should take a `str` parameter.
 
 ```js
-assert.match(cleanInputString?.toString(), /\(str\)/);
+assert.match(cleanInputString?.toString(), /\(\s*str\s*\)/);
 ```
 
 `cleanInputString` should be an empty function.
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
index e40bda3066e..8caede5414c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
index a5d78f8447e..cff7f2266d1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
index 9a9d612b7b3..acb44781788 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
index 9fd3278e45f..aef38dd2fdd 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
@@ -7,24 +7,26 @@ dashedName: step-22
 
 # --description--
 
-Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
-
 You will need to check if the array `["+", "-", " "]` does not include the current character. You can use a combination of the <dfn>includes()</dfn> method and the <dfn>!</dfn> operator to do this.
 
 The `.includes()` method returns `true` if the array contains the character, and `false` if not. The logical NOT operator (`!`) will return the opposite of the value of the `.includes()` method.
 
-下面是一個例子：
+Here is an example checking if the current character is not in the vowels array. If it is not, that current character is pushed into the `consonantArray`:
 
 ```js
-const numbersArray = [1, 2, 3, 4, 5]
-const number = 6
+const inputString = "Hello World";
+const charArray = inputString.split('');
+const consonantArray = [];
 
-if (!numbersArray.includes(number)) {
-  console.log("The number is not in the array.")
+for (let i = 0; i < charArray.length; i++) {
+  if (!['a', 'e', 'i', 'o', 'u'].includes(charArray[i])) {
+    consonantArray.push(charArray[i]);
+  }
 }
-
 ```
 
+Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
+
 # --hints--
 
 Your `for` loop should have an `if` statement.
@@ -37,19 +39,19 @@ Your `for` loop should use `!["+", "-", " "].includes()`.
 
 ```js
 // the loop protection injects code so we have to look at the raw code directly
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(/);
 ```
 
-Your `for` loop should see if `strArray[i]` is found in `["+", "-", " "]`.
+Your `for` loop should see if `!["+", "-", " "].includes(strArray[i])`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?/);
 ```
 
 Your `for` loop should `push` `strArray[i]` to `cleanStrArray`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\[i\]\s*\)\s*;?\s*(\s*\})?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*;?\s*(\s*\})?/);
 ```
 
 # --seed--
@@ -171,19 +173,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
index bba58b9ba42..5110bdf1826 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
@@ -168,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
index 56450655d63..0b28a235270 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
index b4482a43a4a..f538844f770 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
index e1855ef5b98..5f10a093ace 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
index d269ebe0ea2..4d655b9b3b8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
index 0c249136284..34b49108950 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
index 4ba1c1db62d..3b0a6e27556 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
index 6f24e910212..932034898cb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
index 90737a4b248..9c5f6268c7f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
index dcd2c19cdf6..fd968896818 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
index e403997736a..a72a7f983cb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
index 2d7c863b4f8..e1d0c324c77 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
index 8cac3b0ae09..a6fb94c32a8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
@@ -6,8 +6,13 @@ dashedName: step-35
 ---
 
 # --description--
+Strings have a <dfn>.match()</dfn> method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
 
-Strings have a `.match()` method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
+```js
+const str = 'example string';
+const regex = /example/;
+const result = str.match(regex); // Returns ['example']
+```
 
 Return the result of calling the `.match()` method on `str` and passing your `regex` variable as the argument. You'll use this match result later on.
 
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
index 210c05666c5..476a91024ed 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
index 8bcfc6a5656..91ddb6a8c2b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
index 02ad2e0e9a0..dec737c1344 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
index 6a5baa7640b..27f2f64491e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
@@ -26,13 +26,13 @@ Replace your concatenated string in the `querySelector` with a template literal
 You should use a template literal in your `querySelector` method.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`.*`\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`.*`\s*\)/);
 ```
 
 Your template literal should have the value `{targetId} .input-container`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`\$\{targetId\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`\$\{targetId\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
index 25f942aaca0..db151923d28 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
@@ -20,13 +20,13 @@ assert.notMatch(addEntry.toString(), /targetId\s*=/);
 You should replace the `targetId` reference in your template literal with `entryDropdown.value`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 You should add `#` at the beginning of your template literal.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
index ec9187fd3f0..ca015ff4ba0 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
index 8ec53ce0b5a..175bf81d792 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
@@ -24,13 +24,13 @@ assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.query
 You should access the `length` property of your `querySelectorAll()`.
 
 ```js
-assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 Your `entryNumber` variable should be the `length` of the `querySelectorAll`.
 
 ```js
-assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 # --seed--
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
index 079121f891e..2d606a2b496 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
index c0cd0cca884..edd6de01fe7 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
@@ -20,7 +20,7 @@ assert.match(code, /HTMLString\s*=\s*`\n\s*<label>.*<\/label>/);
 Your `label` element should have the text `Entry ${entryNumber} Name`.
 
 ```js
-assert.match(code, /HTMLString\s*=\s*`\n\s*<label>Entry\s\$\{entryNumber\}\sName<\/label>/);
+assert.match(code, /HTMLString\s*=\s*`\n\s*<label>\s*Entry\s\$\{entryNumber\}\sName\s*<\/label>/);
 ```
 
 # --seed--
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
index 03f3cd14841..e4562865ea2 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
index 65b5c3eea93..2340939255a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
index 3fc08887e14..303fdace19b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
index 862ac37199f..55556dbaa04 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
@@ -185,19 +185,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
index 464a4252e7d..16305aba50f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
@@ -172,19 +172,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
index bc5bd8a733a..ad260639e0c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
index 08b87e8f141..1af5286f498 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
index 79153b21631..6f589083e37 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
@@ -146,19 +146,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
index 58460f3f19b..33005ae4d6f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
index 1cc79bd3ec8..0b89799eeb1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
@@ -9,7 +9,25 @@ dashedName: step-50
 
 In the Role Playing Game project, you learned how to set a button's behavior by editing its `onclick` property. You can also edit an element's behavior by adding an event listener.
 
-Call the `.addEventListener()` method of the `addEntryButton`. It takes two arguments. The first is the event to listen to – you should pass the string `click`. The second is the callback function, or the function that runs when the event is triggered. Pass the `addEntry` function as the second argument. Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
+The following example uses the `addEventListener` method to add a click event to a button. When the button is clicked, the `printName` function is called.
+
+```html
+<button class="btn">Print name</button>
+```
+
+```js
+const button = document.querySelector('.btn');
+function printName() {
+  console.log("Jessica");
+}
+button.addEventListener('click', printName);
+```
+
+The `addEventListener` method takes two arguments. The first is the event to listen to. (Ex. `'click'`) The second is the callback function, or the function that runs when the event is triggered.
+
+Call the `.addEventListener()` method on the `addEntryButton`. Pass in the string `click` for the first argument and the `addEntry` function for the second argument.
+
+Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
 
 # --hints--
 
@@ -150,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
index e277456eaf3..c263d0dca76 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
index cf3aef583a8..3695a4e904e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
@@ -7,34 +7,26 @@ dashedName: step-56
 
 # --description--
 
-The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is an array-like which contains the elements that match the query selector.
+The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is a list of elements like an array. It contains the elements that match the query selector. You will need to loop through these elements in the list.
 
-You'll need to loop through these elements, so start by creating a `for` loop. Your iterator `i` should start at `0`, continue while it is less than the length of the list, and increment by `1` each iteration.
+In previous steps, you learned how to loop through an array using a `for` loop. You can also use a <dfn>for...of</dfn> loop to loop through an array and a `NodeList`.
+
+A `for...of` loop is used to iterate over elements in an iterable object like an array. The variable declared in the loop represents the current element being iterated over.
+
+```js
+for (const element of elementArray) {
+  console.log(element);
+}
+```
+
+Create a `for...of` loop that loops through the list. For the loop's variable name, use `const` to declare a variable called `item`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should have a `for` loop.
+You should have a `for...of` loop that loops through the `list` parameter. Use `item` for the loop's variable name.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(/g);
-```
-
-Your `for` loop should initialize a variable called `i` to `0`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;/g);
-```
-
-Your `for` loop should have a condition that checks if `i` is less than the length of `list`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;/g);
-```
-
-Your `for` loop should increment `i` by `1` each time it runs. Use the increment operator for this.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)/g);
+assert.match(code, /for\s*\(\s*const\s+item\s+of\s+list\s*\)\s*\{/);
 ```
 
 # --seed--
@@ -156,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
index 536011927a3..28e59e19fef 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
@@ -9,40 +9,20 @@ dashedName: step-57
 
 The `NodeList` values you will pass to `list` will consist of `input` elements. So you will want to look at the `value` attribute of each element.
 
-Assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
+Assign `item.value` to a `const` variable called `currVal`.
 
 # --hints--
 
-You should have a `currVal` variable.
+You should use `const` to declare a new variable called `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=/);
+assert.match(code, /const\s+currVal\s*=/);
 ```
 
-You should access the element in `list` at index `i` using bracket notation.
+You should assign `item.value` to `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]/);
-```
-
-You should access the `value` attribute of the element in `list` at index `i`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]\.value/);
-```
-
-You should assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*list\[i\]\.value/);
-```
-
-Your `currVal` assignment should be in your `for` loop.
-
-```js
-// another hack, because the loop protection injects stuff
-const getCaloriesString = code.split("function getCaloriesFromInputs")[1];
-assert.match(getCaloriesString, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*(const|let)\s+currVal\s*=\s*list\[i\]\.value/g);
+assert.match(code, /const\s+currVal\s*=\s*item\.value/);
 ```
 
 # --seed--
@@ -164,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,15 +224,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
+  --fcc-editable-region--
+  for (const item of list) {
 
   }
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
index 6c1c7f3bf14..ff2db96a774 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
@@ -9,26 +9,26 @@ dashedName: step-58
 
 Remember that you wrote a function earlier to clean the user's input? You'll need to use that function here.
 
-Update your `currVal` declaration to be the result of calling `cleanInputString` with `list[i].value`.
+Update your `currVal` declaration to be the result of calling `cleanInputString` with `item.value`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should call your `cleanInputString` function.
+You should call the `cleanInputString` function inside the `getCaloriesFromInputs` function.
 
 ```js
 assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(/);
 ```
 
-You should pass `list[i].value` as the argument for `cleanInputString`.
+You should pass `item.value` as the argument for `cleanInputString` function.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 You should assign the result of your `cleanInputString` call to your `currVal` variable.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(code, /const\s+currVal\s*=\s*cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -238,15 +231,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = list[i].value;
+  for (const item of list) {
+    --fcc-editable-region--
+    const currVal = item.value;
+    --fcc-editable-region--
   }
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
index 79197acb706..d33d2057681 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -239,8 +232,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
 
   }
 }
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
index 69d064c60a2..c9c8d431c41 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,8 +244,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
index 1f224ac9ead..f6b80b0911a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
@@ -23,13 +23,13 @@ You should use a template literal to pass the `Invalid Input:` message to the `a
 
 ```js
 // because it transforms template literals...
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: /);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: /);
 ```
 
-You should use template literal syntax to display the first value in the `invalidInputMatch` array after the `Invalid Input:` text.
+You should display the first element of the `invalidInputMatch` array after the `Invalid Input:` text by using a template literal.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\)/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\)/);
 ```
 
 # --seed--
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
index 8eb63ed4a00..c75cc54cb11 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
@@ -7,6 +7,8 @@ dashedName: step-62
 
 # --description--
 
+In programming, `null` is meant to represent the absence of a value. In this case, if the user enters an invalid input, you want to alert them and then return `null` to indicate that the function has failed.
+
 Still within your `if` block, set `isError` to `true` and return `null`.
 
 # --hints--
@@ -14,13 +16,13 @@ Still within your `if` block, set `isError` to `true` and return `null`.
 After your `alert`, you should set `isError` to `true`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true/);
 ```
 
 After you modify `isError`, you should `return` the value `null`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
 ```
 
 # --seed--
@@ -142,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -233,8 +228,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
index d10a2df26fe..fd3b415ec06 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
@@ -17,6 +17,7 @@ The `Number` constructor is a function that converts a value to a number. If the
 
 ```js
 Number('10'); // returns the number 10
+Number('abc'); // returns NaN
 ```
 
 # --hints--
@@ -164,19 +165,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +249,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
index c78c46351e1..a9e5e79d837 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
@@ -17,12 +17,6 @@ You should `return` the `calories` value.
 assert.match(getCaloriesFromInputs.toString(), /return\s+calories/);
 ```
 
-Your new `return` statement should come after your `for` loop.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /calories\s*\+=\sNumber\(currVal\);\n\s*}\n\s*return\s+calories/)
-```
-
 # --seed--
 
 ## --seed-contents--
@@ -142,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -229,12 +216,11 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -244,9 +230,10 @@ function getCaloriesFromInputs(list) {
     }
     calories += Number(currVal);
   }
+  --fcc-editable-region--
 
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
index be8a03e334e..c717cb78fc9 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
@@ -26,7 +26,7 @@ assert.isFunction(calculateCalories);
 Your `calculateCalories` function should take an `e` argument.
 
 ```js
-assert.match(calculateCalories?.toString(), /\(e\)/);
+assert.match(calculateCalories?.toString(), /\(\s*e\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
index 29bc1f9eab8..99733132298 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
@@ -16,7 +16,7 @@ Add a line to your `calculateCalories` function that calls the `preventDefault()
 Your `calculateCalories` function should call `e.preventDefault()`.
 
 ```js
-assert.match(calculateCalories.toString(), /e\.preventDefault\(\)/);
+assert.match(calculateCalories.toString(), /e\.preventDefault\(\s*\)/);
 ```
 
 Your `calculateCalories` function should reset the global error flag to `false`.
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -240,8 +233,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
index 7458fb6f720..f3d8b522d62 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
@@ -22,13 +22,13 @@ assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#breakfast input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `odocument.querySelectorAll()` call to `breakfastNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -249,8 +242,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
index ba56c85a1f2..931eb16f9c3 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#lunch input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `lunchNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -248,8 +241,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
index 626eb0a9e5b..75f5282cddd 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#dinner input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `dinnerNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `snacksNumberInputs` variable.
@@ -38,13 +38,13 @@ assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#snacks input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `snacksNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `exerciseNumberInputs` variable.
@@ -56,13 +56,13 @@ assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#exercise input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `exerciseNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -285,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
index 788fd3a78fb..950a9474835 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +248,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
index 87131cc08cf..132887f642f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -254,8 +247,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
index 5f514e77ea3..8bc7a2feebd 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -291,8 +284,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
index 56549cdcdab..399b4260e65 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -262,8 +255,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
index f2168bdbf39..7109370746a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -260,8 +253,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
index 2c43c311cb7..6276120f4c8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -270,8 +263,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
index 87ca5618628..689c8e8870c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -265,8 +258,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
index 700c68832c1..b110442fca9 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
@@ -162,19 +162,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +273,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
index 0ed8248f2a0..a806af1e81b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
@@ -7,7 +7,7 @@ dashedName: step-78
 
 # --description--
 
-You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element.
+You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element on a new line at the end of the function.
 
 # --hints--
 
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -263,8 +256,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
index 83c3f0e972b..4c7421be27d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
@@ -7,9 +7,16 @@ dashedName: step-79
 
 # --description--
 
-Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable, but lowercased.
+When you need to lower case a string, you can use the <dfn>toLowerCase()</dfn> method. This method returns the calling string value converted to lower case.
 
-Strings have a `.toLowerCase()` method that can help you with this. Do not give your `span` any text yet.
+```js
+const firstName = 'JESSICA';
+console.log(firstName.toLowerCase()); // Output: jessica
+```
+
+Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable. Your `surplusOrDeficit` variable should be converted to lower case using the `toLowerCase()` method.
+
+Do not give your `span` any text yet.
 
 # --hints--
 
@@ -160,19 +167,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -279,8 +279,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
index f0db2de80e8..a9c39235154 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -258,8 +251,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
index f1e944248a8..bf2878652ae 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
@@ -9,7 +9,14 @@ dashedName: step-81
 
 When the user has a calorie deficit, the `remainingCalories` value will be negative. You don't want to display a negative number in the result string.
 
-`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number. In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
+`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number.
+
+```js
+const num = -5;
+Math.abs(num); // 5
+```
+
+In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
 
 # --hints--
 
@@ -24,7 +31,7 @@ Your `span` should have the text `${Math.abs(remainingCalories)} Calorie ${surpl
 
 ```js
 const htmlString = code.split(/output\s*\.\s*innerHTML\s*=\s*/)[1].split(/`/)[1];
-assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(remainingCalories\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
+assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(\s*remainingCalories\s*\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
 ```
 
 # --seed--
@@ -146,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -267,8 +267,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
index 9887b099bcc..3836bddb229 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
index 0f3853671eb..e8d462a60ec 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -283,8 +276,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
index 0a4bbadd784..a6578018671 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
@@ -158,19 +158,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -282,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
index b52152068fa..7245ccdd0c5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
@@ -9,6 +9,11 @@ dashedName: step-85
 
 Finally, you need to make the `#output` element visible so the user can see your text. Your `output` variable is an Element, which has a `classList` property. This property has a `.remove()` method, which accepts a string representing the class to remove from the element.
 
+```js
+const paragraphElement = document.getElementById('paragraph');
+paragraphElement.classList.remove('hide');
+```
+
 Use the `.remove()` method of the `output` variable's `classList` property to remove the `hide` class. Don't forget to place the word `hide` inside quotes.
 
 # --hints--
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -277,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
index 75d22a5f2ce..88cd14eff8f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
index 830a84652c0..2116cc0374f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
index 8f30101e381..102fc699625 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
index cf3cd338e80..d858ef2d1b4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
@@ -9,6 +9,22 @@ dashedName: step-89
 
 Remember that `document.querySelectorAll` returns a `NodeList`, which is array-like but is not an array. However, the `Array` object has a `.from()` method that accepts an array-like and returns an array. This is helpful when you want access to more robust array methods, which you will learn about in a future project.
 
+The following example takes a `NodeList` of `li` elements and converts it to an array of `li` elements:
+
+```html
+<ul>
+  <li>List 1</li>
+  <li>List 2</li>
+  <li>List 3</li>
+</ul>
+```
+
+```js
+const listItemsArray = Array.from(document.querySelectorAll('li'));
+
+console.log(listItemsArray); //Output: (3) [li, li, li]
+```
+
 Wrap your `inputContainers` query selector in `Array.from()`. Do this on the same line as your declaration.
 
 # --hints--
@@ -144,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -269,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
index 7d86f8f5846..f277415696d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
@@ -7,33 +7,25 @@ dashedName: step-90
 
 # --description--
 
-It is time for another loop. Use a `for` loop to iterate through the `inputContainers` array.
+It is time for another loop. Create a `for...of` loop with a variable called `container` to iterate through the `inputContainers` array.
 
-Inside the loop, set the `innerHTML` property of the element at the current index to an empty string. This will clear all of the contents of that input container.
+Inside the loop, set the `innerHTML` property of the `container` to an empty string. This will clear all of the contents of that input container.
 
 # --hints--
 
-Your `clearForm` function should have a `for` loop.
+Your `for...of` loop should iterate through the `inputContainers` array. The loop's variable name should be `container`.
 
 ```js
-// loop protect injects stuff, so let's look at the raw code again
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(/);
+assert.match(clearForm, /for\s*\(\s*const\s+container\s+of\s+inputContainers\s*\)/);
 ```
 
-Your `for` loop should iterate through the `inputContainers` array. Remember to use `i` as your iterator.
+Your `for...of` loop should set the `innerHTML` property of `container` to an empty string.
 
 ```js
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*inputContainers\.length\s*;\s*i\s*\+\+\s*\)/);
-```
-
-Your `for` loop should set the `innerHTML` property of `inputContainers[i]` to an empty string.
-
-```js
-const clearForm = code.split("function clearForm()")[1];
-const forLoop = clearForm.split("for")[1];
-assert.match(forLoop, /inputContainers\[\s*i\s*\]\s*\.innerHTML\s*=\s*(`|'|")\1\s*/);
+const forOfLoop = clearForm.split("for")[1];
+assert.match(forOfLoop, /container\s*\.\s*innerHTML\s*=\s*(`|'|")\1\s*/);
 ```
 
 # --seed--
@@ -155,19 +147,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +265,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
index a2bc176f3c2..24b72154714 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
index 6370d8d1ce1..6d7dea84b78 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
index a8291fa53cf..8c66a413262 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
index ef59ff9562a..52323c92a4f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -292,8 +285,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
@@ -425,19 +418,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -550,8 +536,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -567,8 +553,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
index 253f115fb53..9ab41ebe23b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
@@ -16,13 +16,13 @@ In your `createLabel` function, declare a `label` variable and assign it a new `
 You should declare a `label` variable in your `createLabel` function.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*(?:const|let|var)\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*(?:const|let|var)\s+label/);
 ```
 
 Your `label` variable should be declared with `const`.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*const\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*const\s+label/);
 ```
 
 You should use the `.createElement()` method of the `document` object.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
index 63b00dea5a4..4d93fe2178d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
@@ -22,7 +22,7 @@ assert.match(code, /letters\.forEach\(/);
 You should pass your `createLabel` function reference to the `.forEach()` method.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*createLabel\s*\)/);
+assert.match(code, /letters\.forEach\(\s*(?:\(\s*([\S]*)\s*\)|\s*([\S]*))\s*=>\s*createLabel\(\s*\1\2\s*\)\s*\)|letters\.forEach\(\s*createLabel\s*\)/);
 ```
 
 You should not pass a `createLabel` function call.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
index 41975d94edc..ebe99a09d3a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-In your callback, call `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
+In your callback, you will need to make two function calls. Start by calling `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
 
 Then call the `.forEach()` method on your `letters` array. Pass an empty callback function which takes a `letter` parameter.
 
@@ -46,7 +46,13 @@ assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{/)
 Your callback function should be empty.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{\s*\}/)
+assert.match(code, /letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}/)
+```
+
+Your `letters.forEach()` callback function should be nested inside the `range(1, 99).forEach(number => {}` callback function.
+
+```js
+assert.match(code, /range\s*\(\s*1\s*,\s*99\s*\)\s*.forEach\s*\(\s*(\(\s*number\s*\)|number)\s*=>\s*\{\s*[^}]*letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}\s*\)\s*\}\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
index cf515d8e50c..e376c0eeb7d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
@@ -9,8 +9,6 @@ dashedName: step-17
 
 Now in your nested `.forEach()` call, declare an `input` variable. Use the `.createElement()` method of the `document` object to create an `input` element. Set the `type` attribute to `text` and the `id` attribute to `letter + number`.
 
-For accessibility, set the `aria-label` attribute to the same value as the `id` attribute.
-
 # --hints--
 
 You should declare an `input` variable.
@@ -67,18 +65,6 @@ You should set the `id` attribute of your `input` element to `letter + number`.
 assert.match(code, /input\.id\s*=\s*letter\s\+\snumber/)
 ```
 
-You should access the `ariaLabel` property of your `input` element.
-
-```js
-assert.match(code, /input\.ariaLabel/);
-```
-
-You should set the `aria-label` attribute of your `input` element to `letter + number`.
-
-```js
-assert.match(code, /input\.ariaLabel\s*=\s*letter\s\+\snumber/)
-```
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
index 6fe0ab92ad8..42633bfd960 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
@@ -1,8 +1,8 @@
 ---
 id: 643498328cb52026123e2b91
-title: 步驟 18
+title: Step 19
 challengeType: 0
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
index 614ad2ae94e..8d1ddcd5fb5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
@@ -1,8 +1,8 @@
 ---
 id: 643498755d54c6279ba09078
-title: 步驟 19
+title: Step 20
 challengeType: 0
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
index c00f56c5337..9d06932a530 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
@@ -1,8 +1,8 @@
 ---
 id: 6437124c4c03dd4c8fb35d56
-title: 步驟 20
+title: Step 21
 challengeType: 0
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
index 1cca0f0974a..58e532930ff 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
@@ -1,8 +1,8 @@
 ---
 id: 6437133052eaf04d7300e622
-title: 步驟21
+title: Step 22
 challengeType: 0
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
index 58467df1513..b23e311ab0e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
@@ -1,8 +1,8 @@
 ---
 id: 643715013330824ecaa70442
-title: 步驟 22
+title: Step 23
 challengeType: 0
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
index b4899a47579..deb4a393803 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d1e5af8c0148fbef96d
-title: 步驟-23
+title: Step 24
 challengeType: 0
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
index d5963a52517..8c9bacddb49 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d80bc174a158c973080
-title: 步驟 24
+title: Step 25
 challengeType: 0
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
@@ -50,19 +50,19 @@ assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*n
 The first element of the array passed to `average()` should be the element at the `middle` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]/);
 ```
 
 The first element of the array passed to `average()` should be the element at the `middle + 1` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\)/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)/);
 ```
 
 If the ternary is false, you should return the value of `sorted` at the `middle` index. Use `Math.ceil()` to round the `middle` value up.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\[\s*Math\.ceil\(\s*middle\s*\)\s*\];?/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\s*\[\s*Math\.ceil\(\s*middle\s*\)\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
index 3ea34894046..efe3f42753d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
@@ -1,8 +1,8 @@
 ---
 id: 64496df724dd3716a71fe971
-title: 步驟 25
+title: Step 26
 challengeType: 0
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
index ecd46e9eb24..7b8b7d9ffe6 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
@@ -1,8 +1,8 @@
 ---
 id: 64496e9c6d7a2e189948e441
-title: 步驟 26
+title: Step 27
 challengeType: 0
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
index 4544b681a94..52e6a20efa0 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
@@ -1,8 +1,8 @@
 ---
 id: 6449749d20436c1f1dfadcf2
-title: 步驟 27
+title: Step 28
 challengeType: 0
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
index d311593c8d2..63c290f2fb7 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
@@ -1,8 +1,8 @@
 ---
 id: 6449755666005520330cec5b
-title: 第 28 步
+title: Step 29
 challengeType: 0
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
index 0646fb3496b..1dc1617bd6e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
@@ -1,8 +1,8 @@
 ---
 id: 64497da4062602213ecf32e7
-title: 步驟 29
+title: Step 30
 challengeType: 0
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
index cdbe9d2746e..e018fb06bbf 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
@@ -1,8 +1,8 @@
 ---
 id: 64497de936a2f322327e5c58
-title: 第 30 步
+title: Step 31
 challengeType: 0
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
index f9e6a3c022b..9a418bcf2fb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e0e5e5a2c2329785af4
-title: 步驟 31
+title: Step 32
 challengeType: 0
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
@@ -16,7 +16,7 @@ Use the `&&` operator to add a second condition to your `if` statement that also
 You should use the `&&` operator to add a second condition to your `if` statement that also checks if the first character of `value` is `=`. You may use `[0]`, `.startsWith()`, or `.charAt(0)`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
index 3e223748b92..cea5d468a27 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e764135bd24b7960dd3
-title: 步驟 32
+title: Step 33
 challengeType: 0
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
index a71c38a6044..117a075e0f3 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
@@ -1,8 +1,8 @@
 ---
 id: 6449842c6f6c84261075e4c9
-title: 步驟 33
+title: Step 34
 challengeType: 0
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
index 0bd71ed1ccb..f331b2e13dc 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
@@ -1,8 +1,8 @@
 ---
 id: 64498473a17adc26ef0ecc2d
-title: 步驟 34
+title: Step 35
 challengeType: 0
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
index 0bd5b1467c0..869aa786b1b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
@@ -1,8 +1,8 @@
 ---
 id: 6449849b78f43527be1e8a98
-title: 步驟 35
+title: Step 36
 challengeType: 0
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
index f35854e7627..379d979b83e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
@@ -1,8 +1,8 @@
 ---
 id: 64498542cab69128ab24e4de
-title: 步驟 36
+title: Step 37
 challengeType: 0
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
index 764193d39e0..db2048f5154 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
@@ -1,8 +1,8 @@
 ---
 id: 6449860d84c9e22cbd7b497c
-title: 步驟 37
+title: Step 38
 challengeType: 0
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
index e2b0221f288..1d217df30cf 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
@@ -1,8 +1,8 @@
 ---
 id: 6449863f592af72d9be0959e
-title: 步驟 38
+title: Step 39
 challengeType: 0
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
index a21ec211265..97250208fe7 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
@@ -1,8 +1,8 @@
 ---
 id: 6449874d5191562eb3313b3f
-title: 步驟 39
+title: Step 40
 challengeType: 0
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
index 4932525966c..f48039d757e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
@@ -1,8 +1,8 @@
 ---
 id: 6449876e7aae0d2f8257a497
-title: 步驟 40
+title: Step 41
 challengeType: 0
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
index fbdcda33519..6e3f9b611c6 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
@@ -1,8 +1,8 @@
 ---
 id: 64498b085028fc30a58bb6a7
-title: 步驟 41
+title: Step 42
 challengeType: 0
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
index e76b942ff74..d0a3366315c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0889c6ff4baa46ac1c50
-title: 步驟 42
+title: Step 43
 challengeType: 0
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
index 87d5c10e7c6..716a7d4ca9a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
@@ -1,8 +1,8 @@
 ---
 id: 646d09a07241aaab1e777080
-title: 第 43 步
+title: Step 44
 challengeType: 0
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
index b10a685922f..c121dff8def 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0a022da7bcabf3e3aca3
-title: 步驟 44
+title: Step 45
 challengeType: 0
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
index d15867d3ac6..75cdd0b7890 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0d20108440acc95a6b32
-title: 步驟 45
+title: Step 46
 challengeType: 0
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
index afb43b3040f..e8720b88a53 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0db5175974ad8633b71c
-title: 步驟 46
+title: Step 47
 challengeType: 0
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
index 089cad45f70..d5c1b76abff 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0e4636e14eae2bb3b992
-title: 步驟 47
+title: Step 48
 challengeType: 0
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
index 6de4755f9b3..bce3cb02167 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1980018efaaec2b1c28b
-title: 步驟 48
+title: Step 49
 challengeType: 0
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
index 4c32646dd09..7f8eb0a90b8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
@@ -1,8 +1,8 @@
 ---
 id: 646d19fc4705e4af65c3e688
-title: 步驟 49
+title: Step 50
 challengeType: 0
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
index 11dcef2404b..b8b6d95b2e5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1b96dd7ea4b0061458bc
-title: 步驟 50
+title: Step 51
 challengeType: 0
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
index d5a2cd22da4..fb0d686e40d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
@@ -1,13 +1,13 @@
 ---
 id: 646d1cadf0d96ab0b7e12da4
-title: 步驟 51
+title: Step 52
 challengeType: 0
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
 
-Because `elemValue` returns a function, your `addChars` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
+Because `elemValue` returns a function, your `addCharacters` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
 
 <!-- TODO: Explain further? -->
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
index e01ea665686..c1ef0ae4591 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1d67f9261fb15a795588
-title: 第 52 步
+title: Step 53
 challengeType: 0
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
index 2b28ecb17b7..81a967ea80d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1e531042dfb24da1f032
-title: 步驟 53
+title: Step 54
 challengeType: 0
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
@@ -16,13 +16,13 @@ The callback function takes a few parameters. The first is the matched string. P
 You should pass an arrow function as the second argument to your `.replace()` method.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 Your arrow function should take a `match` parameter.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
index d9dd437b357..4e0bdcafe1b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3141790b3cb337dd611a
-title: 第 54 步
+title: Step 55
 challengeType: 0
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
index 94bdd0fad28..a976d2e313d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
@@ -1,8 +1,8 @@
 ---
 id: 646d382c4d70ceb3dba1e830
-title: 步驟 55
+title: Step 56
 challengeType: 0
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
index 7c09a0c3323..7a1435a9e93 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
@@ -1,8 +1,8 @@
 ---
 id: 646d386a685620b49db4be76
-title: 步驟 56
+title: Step 57
 challengeType: 0
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
index 39fc7aa30f9..c6980b6b44a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38c326f3c8b54023de38
-title: 步驟 57
+title: Step 58
 challengeType: 0
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
index 12d5eae2326..0af42bfb322 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38f906b94cb5fe6ce7de
-title: 步驟 58
+title: Step 59
 challengeType: 0
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
index 622b4992b6e..daa12199dcb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3952f6af37b6a1c241c2
-title: 步驟 59
+title: Step 60
 challengeType: 0
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
index 12287046177..e9f8b5ce15d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
@@ -1,8 +1,8 @@
 ---
 id: 646d39c156fe94b7482c3ab6
-title: 步驟 60
+title: Step 61
 challengeType: 0
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
index aa93144704e..3fa9bd07097 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3b27cd3c56b875256301
-title: 步驟 61
+title: Step 62
 challengeType: 0
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
index 004f15068a8..4e1043eecb1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3bc75fe0c9b972da3323
-title: 步驟 62
+title: Step 63
 challengeType: 0
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
index 0dd666177a1..ec294284249 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3c146e10b0ba222bb2a7
-title: 步驟 63
+title: Step 64
 challengeType: 0
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
index 153f6d73301..747899bb3e3 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d037872fbbae0a8ec0e
-title: 步驟 64
+title: Step 65
 challengeType: 0
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
index 8be7040cfc6..022a6c568cb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d65be79c8bb9c7df9ff
-title: 步驟 65
+title: Step 66
 challengeType: 0
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
index f1ef73b10a6..9615d7f929a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d80c3b4aebc4103618e
-title: 第 66 步
+title: Step 67
 challengeType: 0
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
index 09f18ca26c1..196385d39b2 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3da8501e15bcd355ba1d
-title: 步驟 67
+title: Step 68
 challengeType: 0
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
index 5e91d799f17..3cb7c61d53f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e135ab3abbdbfe5c899
-title: 步驟 68
+title: Step 69
 challengeType: 0
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
index 61244552bd7..8c653ee86f4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e64b15f92be6e61704e
-title: 步驟 69
+title: Step 70
 challengeType: 0
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str
 Your callback function should use bracket notation to access the property of the `infixToFunction` object that matches the value of the `operator` parameter.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
index 430b608c052..cd6d06d7e99 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3ee7b17ae3bf48610033
-title: 步驟 70
+title: Step 71
 challengeType: 0
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
@@ -14,19 +14,19 @@ dashedName: step-70
 Your callback function should return the result of calling `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(/);
 ```
 
 You should pass `arg1` as the first argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1/);
 ```
 
 You should pass `arg2` as the second argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
index a04caabef0d..2145e640b31 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f1fd12f76c02c823bb8
-title: 步驟 71
+title: Step 72
 challengeType: 0
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
@@ -16,13 +16,13 @@ Wrap each of your `infixToFunction[operator]` arguments in a `parseFloat()` call
 You should wrap `arg1` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
 ```
 
 You should wrap `arg2` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
index 23092aa0bd6..f9fcf26f42e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f718b5f8dc102cd528e
-title: 步驟 72
+title: Step 73
 challengeType: 0
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
index b9020c4a7b2..d7bdc37d7b2 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
@@ -1,8 +1,8 @@
 ---
 id: 646d404259f512c1a9e86ac1
-title: 步驟 73
+title: Step 74
 challengeType: 0
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
index 3ab4aa4d04a..167d450138d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40c543943ec250039682
-title: 步驟 74
+title: Step 75
 challengeType: 0
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
index 7c9261d608c..660a596da8e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40fe4b7b50c30c2b4cd8
-title: 步驟 75
+title: Step 76
 challengeType: 0
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
index 6b04bd61b6f..0bc08a4012e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
@@ -1,8 +1,8 @@
 ---
 id: 646d41e23b583fc3b8cc4579
-title: 步驟 76
+title: Step 77
 challengeType: 0
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
index 355f78d9222..16562b4bb2f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
@@ -1,8 +1,8 @@
 ---
 id: 646d423fade4a9c4636acd13
-title: 步驟 77
+title: Step 78
 challengeType: 0
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
index d1704c74876..efc5d0ffc18 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
@@ -1,8 +1,8 @@
 ---
 id: 646d42f58deb2fc52adc6611
-title: 步驟 78
+title: Step 79
 challengeType: 0
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
index e8f2ccb6d97..02383be897f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d43587d926bc5b6cb2e50
-title: 步驟 79
+title: Step 80
 challengeType: 0
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
index 2791056df61..1ea064565a1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d448479c8fdc8dcec868c
-title: 步驟 80
+title: Step 81
 challengeType: 0
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
index 7060edc7f4a..b6fe908bbf8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d44da986f2bc9b72f5fe2
-title: 第 81 步
+title: Step 82
 challengeType: 0
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
index ddaeb9e0517..3d6821dadd1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
@@ -1,8 +1,8 @@
 ---
 id: 646d451c2e44afca71b67818
-title: 步驟 82
+title: Step 83
 challengeType: 0
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
index a522b8d41a2..18d0465bd29 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4554721d43cb19a68bc4
-title: 步驟 83
+title: Step 84
 challengeType: 0
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
@@ -28,13 +28,13 @@ assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*cons
 Your `apply` function should access the property of the `spreadsheetFunctions` object that matches the `fn` value.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn/);
 ```
 
 Your `apply` function should call the `.toLowerCase()` method on `fn` in the property access.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]/);
 ```
 
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
index 53574caee7d..b14d113cdfd 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45b739da5ecbf830c108
-title: 步驟 84
+title: Step 85
 challengeType: 0
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Your `apply` function is returning the spreadsheet function, but not actually ap
 Your `apply` function should call the `spreadsheetFunctions[fn.toLowerCase()]` function.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(/);
 ```
 
 You should pass a `toNumberList()` call to your `spreadsheetFunctions[fn.toLowerCase()]` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(/);
 ```
 
 You should pass `args` to your `toNumberList()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
index 5a6d490cb7d..95734fb4ffe 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45ee725632cca2555146
-title: 步驟 85
+title: Step 86
 challengeType: 0
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Now your `applyFunction` needs to return a result. Return the result of calling
 Your `applyFunction` function should return the result of calling the `.replace()` method on `str2`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(/);
 ```
 
 You should pass `functionCall` as the first argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall/);
 ```
 
 You should pass an empty arrow function as the second argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
 ```
 
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
index f1119a97fec..8eb18bbd464 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4626420eeecd51f241c2
-title: 步驟 86
+title: Step 87
 challengeType: 0
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Remember to make `fn` lower case.
 Your callback function should have `match` as the first parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
 ```
 
 Your callback function should have `fn` as the second parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
 ```
 
 Your callback function should have `args` as the third parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
 ```
 
 Your callback function should use an implicit return.
 
 ```js
-assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
+assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
 ```
 
 Your callback function should return the result of calling the `.hasOwnProperty()` method on the `spreadsheetFunctions` object.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
 ```
 
 You should pass `fn` to the .`hasOwnProperty()` method.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn/);
 ```
 
 You should call the `.toLowerCase()` method on `fn`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
index 8cb1ca6bfbd..1fd62328533 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d467c6994f4ce0dc416a4
-title: 步驟 87
+title: Step 88
 challengeType: 0
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
@@ -14,31 +14,31 @@ Use the ternary operator to turn your `.hasOwnProperty()` call into the conditio
 Your callback function should use ternary syntax.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
 ```
 
 If the ternary condition is true, your callback function should return the result of calling `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\s*\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\s*\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
 ```
 
 You should pass `fn` as the first argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
 ```
 
 You should pass `args` as the second argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
 ```
 
 If the ternary is false, you should return `match`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
index de128d9ab6e..222c5c8a20d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
@@ -1,8 +1,8 @@
 ---
 id: 646d46c03e7d02cecb30f021
-title: 步驟 88
+title: Step 89
 challengeType: 0
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
@@ -14,25 +14,25 @@ Now you can start applying your function parser to your `evalFormula` logic. Dec
 You should declare a `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
 ```
 
 You should use `const` to declare your `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*const\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*const\s+functionExpanded\s*=\s*/);
 ```
 
 You should assign the `functionExpanded` variable the result of calling your `applyFunction` function.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
 ```
 
 You should pass `cellExpanded` to your `applyFunction` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
index e6f99f02b5a..48b1cab80ed 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4717a689e1cfa232e357
-title: 步驟 89
+title: Step 90
 challengeType: 0
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Use a ternary to check if `functionExpanded` is equal to the original string `x`
 Your `evalFormula` function should use the `return` keyword.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
 ```
 
 Your `return` statement should check if `functionExpanded` is equal to `x`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
 ```
 
 Your `return` statement should use a ternary operator.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
 ```
 
 If the ternary condition is true, your `evalFormula()` should return `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
 ```
 
 If the ternary condition is false, your `evalFormula()` should return the result of calling `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
 ```
 
 You should pass `functionExpanded` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
 ```
 
 You should pass `cells` as the second argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
index b4960400165..c1249111d86 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4769ba65f1d05ef6b634
-title: 步驟 90
+title: Step 91
 challengeType: 0
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
@@ -16,19 +16,19 @@ Inside your `if` statement, set the `value` of the `element` to be the result of
 You should update the `value` property of `element` in your `if` block.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
 ```
 
 You should assign the `value` property the result of calling your `evalFormula()` function.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
 ```
 
 You should not pass any arguments to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
index 4c7e24fcc8a..9ef5920b36a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
@@ -1,8 +1,8 @@
 ---
 id: 646d47c8f58107d10f1e5106
-title: 步驟 91
+title: Step 92
 challengeType: 0
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
@@ -14,19 +14,19 @@ The first argument for your `evalFormula` call needs to be the contents of the c
 You should pass `value` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
 ```
 
 You should call the `.slice()` method on the `value` argument.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(/);
 ```
 
 You should pass the number `1` as the argument to your `.slice()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(\s*1\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
index 7368151b23a..c2b4d2b8c71 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4813c17b37d1e261a566
-title: 步驟 92
+title: Step 93
 challengeType: 0
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
@@ -14,19 +14,19 @@ You can quickly get all cells from your page by getting the `#container` element
 For the second parameter of your `evalFormula()` call, you should call the `.getElementById()` method of the `document` object.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
 ```
 
 You should pass `container` as the argument to your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
 ```
 
 You should access the `children` property of the result of your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
index 1bb0d34f2e9..ac6184b9d56 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
@@ -1,8 +1,8 @@
 ---
 id: 646d486aec20f7d2a581cc36
-title: 步驟 93
+title: Step 94
 challengeType: 0
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
@@ -14,7 +14,7 @@ Unfortunately, that `children` property is returning a collection of elements, w
 You should wrap your `document.getElementById('container').children` in `Array.from()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
index 12e00dd50bd..98ffeb00088 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
@@ -1,8 +1,8 @@
 ---
 id: 646d48b936802fd34c3f05af
-title: 步驟 94
+title: Step 95
 challengeType: 0
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
index bab53c38492..a4c682f9df4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d498c8ebc31d3f753b22e
-title: 步驟 95
+title: Step 96
 challengeType: 0
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
index d4fd6379491..43c6ebe6441 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
@@ -1,8 +1,8 @@
 ---
 id: 646d49bfff9079d4b38df115
-title: 步驟 96
+title: Step 97
 challengeType: 0
-dashedName: step-96
+dashedName: step-97
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
index 5588f1dd34a..0e9787dff11 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a07a8fb14d55cd70e09
-title: 步驟 97
+title: Step 98
 challengeType: 0
-dashedName: step-97
+dashedName: step-98
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
index d9b6b959c77..983d30989b0 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a5b32a1cad6165df286
-title: 步驟 99
+title: Step 100
 challengeType: 0
-dashedName: step-99
+dashedName: step-100
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
index 548ee8e9d0c..34ae3e371aa 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a8dbc04c6d6bb0001f8
-title: 步驟 100
+title: Step 101
 challengeType: 0
-dashedName: step-100
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
index fd692a4af1f..b221e737fdb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4ab9b3b4c5d74fdd2154
-title: 步驟 101
+title: Step 102
 challengeType: 0
-dashedName: step-101
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
index 9f99ac0f8f7..89e89d3ac90 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4b3d80ea98d824c8a4f9
-title: 步驟 102
+title: Step 103
 challengeType: 0
-dashedName: step-102
+dashedName: step-103
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
index 2c3e0b31c11..eb5424ffa9d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
@@ -1,8 +1,8 @@
 ---
 id: 6491d38f5b09a021c4b5d5fe
-title: 步驟 98
+title: Step 99
 challengeType: 0
-dashedName: step-98
+dashedName: step-99
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
new file mode 100644
index 00000000000..3a606f8e1cf
--- /dev/null
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
@@ -0,0 +1,104 @@
+---
+id: 65ae458e23954c3469e0c209
+title: Step 18
+challengeType: 0
+dashedName: step-18
+---
+
+
+# --description--
+
+In earlier projects you learned about the `setAttribute` method. Another way to update an attribute in JavaScript is to use the following syntax:
+
+```js
+el.attribute = value;
+```
+
+The property names for hyphenated HTML attribute values, such as `aria-label`, follow camel case, becoming `ariaLabel`.
+
+```js
+el.ariaLabel = "Aria Label Value";
+```
+
+Set the `aria-label` attribute for the `input` element to the same value as the `id` attribute.
+
+
+# --hints--
+
+You should have an `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=/);
+```
+
+
+You should assign `letter + number` to `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=\s*letter\s*\+\s*number/);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="./styles.css" />
+    <title>Functional Programming Spreadsheet</title>
+  </head>
+  <body>
+    <div id="container">
+      <div></div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+#container {
+  display: grid;
+  grid-template-columns: 50px repeat(10, 200px);
+  grid-template-rows: repeat(11, 30px);
+}
+
+.label {
+  background-color: lightgray;
+  text-align: center;
+  vertical-align: middle;
+  line-height: 30px;
+}
+```
+
+```js
+const range = (start, end) => Array(end - start + 1).fill(start).map((element, index) => element + index);
+const charRange = (start, end) => range(start.charCodeAt(0), end.charCodeAt(0)).map(code => String.fromCharCode(code));
+
+window.onload = () => {
+  const container = document.getElementById("container");
+  const createLabel = (name) => {
+    const label = document.createElement("div");
+    label.className = "label";
+    label.textContent = name;
+    container.appendChild(label);
+  }
+  const letters = charRange("A", "J");
+  letters.forEach(createLabel);
+  range(1, 99).forEach(number => {
+     createLabel(number);
+--fcc-editable-region--
+    letters.forEach(letter => {
+     const input = document.createElement("input");
+     input.type = "text";
+     input.id = letter + number;
+
+    })   
+--fcc-editable-region--
+  })
+}
+```
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
index 310764dc5c7..068faa47023 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
@@ -16,7 +16,7 @@ Now you should be able to roll the dice a few times and see the values update.
 You should call your `updateStats` function inside the `else` clause.
 
 ```js
-assert.match(code, /updateStats\(\)/)
+assert.match(code, /updateStats\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
index 42267b03fb7..a8412a77b98 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
@@ -28,7 +28,7 @@ assert.match(code, /const\s+updateRadioOption\s*=\s*\(.*\)\s*=>\s*{\s*[\s\S]*};?
 Your `updateRadioOption` function should take `optionNode` and `score` as parameters.
 
 ```js
-assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\)\s*=>\s*{\s*[\s\S]*};?/)
+assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\s*\)\s*=>\s*{\s*[\s\S]*};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
index eab6294fda8..9bf231cab3c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
@@ -14,7 +14,7 @@ To enable the radio buttons, you should set the `disabled` property on `scoreInp
 You should assign `false` to `scoreInputs[optionNode].disabled`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.disabled\s*=\s*false/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.disabled\s*=\s*false/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
index 048bb270d52..7292a832da1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
@@ -14,7 +14,7 @@ Next, you will need to update the radio button's `value` to the current `score`.
 You should assign the `score` variable to `scoreInputs[optionNode].value`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.value\s*=\s*score/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.value\s*=\s*score/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
index 84c5e8d195c..d3666f7888d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
@@ -14,7 +14,7 @@ To display the current score, update the text content for the `span` element nex
 You should set the `textContent` property for `scoreSpans[optionNode]` to the following template literal: `, score = ${score}`.
 
 ```js
-assert.match(code, /scoreSpans\[\s*optionNode\s*\]\.textContent\s*=\s*`, score = \${score}`;?/);
+assert.match(code, /scoreSpans\s*\[\s*optionNode\s*\]\s*\.textContent\s*=\s*`, score = \${score}`;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
index 9946fd16404..2130235d45f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
@@ -22,7 +22,7 @@ assert.match(code, /updateRadioOption\(.*\);?/);
 You should have the arguments of `0` and `10` for the `updateRadioOption` function.
 
 ```js
-assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
index 46dbaa2da65..5c715f6c1bc 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
@@ -14,7 +14,7 @@ Now that you have verified the `updateRadioOption` function works, remove the fu
 You should remove the `updateRadioOption` function call from your `else` clause.
 
 ```js
-assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
index e0408704094..2ef9e2480e8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
@@ -18,19 +18,19 @@ Below your `if` statement, include an `else` clause that assigns `1` to `counts[
 You should have an `if` statement with a condition of `counts[num]`.
 
 ```js
-assert.match(code, /if\s*\(\s*counts\[num\]\s*\)/);
+assert.match(code, /if\s*\(\s*counts\s*\[\s*num\s*\]\s*\)/);
 ```
 
 You should use the `++` operator to increment the value of `counts[num]` by `1` inside your `if` statement.
 
 ```js
-assert.match(code, /counts\[num\]\s*\+\s*=\s*1|counts\[num\]\+\+/);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*\+\s*=\s*1|counts\s*\[\s*num\s*\]\s*\+\+/);
 ```
 
 You should assign `1` to `counts[num]` inside your `else` clause.
 
 ```js
-assert.match(code, /else\s*\{\s*counts\[num\]\s*=\s*1\s*;?\s*\}/);
+assert.match(code, /else\s*\{\s*counts\s*\[\s*num\s*\]\s*=\s*1\s*;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
index aa9649d2f22..e5429b62831 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
@@ -22,7 +22,7 @@ assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s
 You should assign `counts[num]` to your `count` variable.
 
 ```js
-assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\[num\]\s*;?\s*}/);
+assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\s*\[\s*num\s*\]\s*;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
index 428725fd108..12854155520 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
@@ -16,7 +16,7 @@ Now, try rolling the dice again and you should see that the previous score `inpu
 You should call the `resetRadioOption` function inside the `rollDiceBtn` callback function.
 
 ```js
-assert.match(code, /resetRadioOption\(\);?/);
+assert.match(code, /resetRadioOption\(\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
index 2aaf7f8055b..5b31c9710fe 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
@@ -22,7 +22,7 @@ assert.isFunction(resetGame);
 You should use arrow syntax for your `resetGame` function.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*}\s*;?/);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
index 85f662c3076..57935cc61e9 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
@@ -24,25 +24,25 @@ assert.match(code, /diceValuesArr\s*=\s*\[\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s
 You should reassign the `score` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `totalScore` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `rolls` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `round` variable to `1`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
index 8956bb3b777..3508b861139 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
@@ -14,13 +14,13 @@ To reset each of the dice values to show `0`, apply a `forEach` method to the `l
 You should call the `forEach` method of the `listOfAllDice` variable.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
 ```
 
 For your callback function, you should use `dice` and `index` as parameters.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
index 6b28151e8b9..473dcda6801 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
@@ -14,13 +14,13 @@ Inside your callback function, update the `dice` text content by assigning it th
 You should access the `textContent` property of the `dice` parameter.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
 ```
 
 You should assign `diceValuesArr[index]` to `dice.textContent`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
index 4f5fd3bfb06..4e515f4260e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
@@ -20,25 +20,25 @@ Lastly, update the `currentRoundText` text content by assigning it the `round` v
 You should assign `totalScore` to `totalScoreText.textContent`.
 
 ```js
-assert.match(code, /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
+assert.match(resetGame.toString(), /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
 ```
 
 You should use the `innerHTML` property to set the `scoreHistory` to an empty string.
 
 ```js
-assert.match(code, /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
+assert.match(resetGame.toString(), /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
 ```
 
 You should assign `rolls` to `currentRoundRollsText.textContent`.
 
 ```js
-assert.match(code, /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
+assert.match(resetGame.toString(), /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
 ```
 
 You should assign `round` to `currentRoundText.textContent`.
 
 ```js
-assert.match(code, /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
+assert.match(resetGame.toString(), /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
index 8776c51b87c..35d8c7eb0b4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
@@ -16,7 +16,7 @@ Assign the entire result of your `ternary` to `counts[num]`.
 You should assign `counts[num] ? counts[num] + 1 : 1` to `counts[num]` in the `for...of` loop.
 
 ```js
-assert.match(code, /counts\[num\]\s*=\s*counts\[num\]\s*\?\s*counts\[num\]\s*\+\s*1\s*:\s*1\s*;?/s);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*=\s*counts\s*\[\s*num\s*\]\s*\?\s*counts\s*\[\s*num\s*\]\s*\+\s*1\s*:\s*1\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
index 4587bbebf61..e6a056f50da 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasThreeOfAKind\s*=/);
 You should assign `Object.values(counts)` to your `hasThreeOfAKind` variable.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(3)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\)\.includes\(3\)\s*;?/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*3\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
index 1c8de86eff4..9ef04029c46 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasPair\s*=/);
 You should assign `Object.values(counts)` to your `hasPair` variable.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(2)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\)\.includes\(2\)\s*;?/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*2\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
index 29feab59ac5..ef5559c546a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
@@ -36,7 +36,7 @@ assert.match(code, /const\s+sortedNumbersArr\s*=\s*arr\.sort\(.*\);?/);
 Your callback function should use `a` and `b` for the parameters and implicitly return `a - b`.
 
 ```js
-assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(a,\s*b\)\s*=>\s*a\s*-\s*b\s*\));?/);
+assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(\s*a,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\));?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
index e5ec0cfaa5c..1f7c5c27bf0 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+smallStraightsArr\s*=?\s*;?/);
 You should store the strings `1234`, `2345` and `3456` in an array and assign it to your `smallStraightsArr`.
 
 ```js
-assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\];?/);
+assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
index ed4e5028765..e76ecfc0855 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+largeStraightsArr\s*=?\s*;?/);
 You should store the strings `12345` and `23456` in an array and assign it to your `largeStraightsArr`.
 
 ```js
-assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\];?/);
+assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
index a5698046fb6..79b8ce742f4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `smallStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `3` and `30` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
index 30b1f6dec60..881e7d7c34b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `largeStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `4` and `40` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
index a94c73af1e0..425a212426b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
@@ -16,7 +16,7 @@ Inside the `animate` function, create an `if` statement where the condition chec
 You should have an `if` statement that checks if the right key was pressed and the player's `x` position is less than 400.
 
 ```js
-assert.match(animate.toString(), /keys\.rightKey\.pressed\s*&&\s*player\.position\.x\s*<\s*400/);
+assert.match(animate.toString(), /keys\.rightKey\.(pressed|pressed\s*===\s*true)\s*&&\s*player\.position\.x\s*<\s*400/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
index d75c476ab90..0031855b59e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
@@ -30,7 +30,7 @@ assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*
 You should call the `draw` method on each `platform`.
 
 ```js
-assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\)\s*;?\s*}?\s*\);?/);
+assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\s*\)\s*;?\s*}?\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
index f256c6e41f3..96c28fbe575 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
@@ -26,7 +26,7 @@ Your callback function should have a `platform` parameter.
 
 ```js
 const splitter = code.split("platform.position.x += 5;")
-assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\);?/);
+assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
index 198614c0f93..94d399a0dac 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
@@ -9,17 +9,17 @@ dashedName: step-78
 
 Inside the callback function, create a new `const` variable called `collisionDetectionRules` and assign it an empty array.
 
-Inside that array, add a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+Inside that array, add a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 # --hints--
 
 You should have a `const` variable called `collisionDetectionRules` that is assigned an empty array.
 
 ```js
-assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\];?/);
+assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\s*\]\s*;?/);
 ```
 
-You should have a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+You should have a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 ```js
 assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*player\.position\.y\s*\+\s*player\.height\s*<=\s*platform\.position\.y\s*,?\s*]\s*;?/);
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
index e625fbc4f33..c2beb12244d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
@@ -14,7 +14,7 @@ Inside that array, add a boolean expression that checks if the player's `x` posi
 You should have a boolean expression that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
index 8031aa1c5f2..b2d3ff7be75 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
@@ -14,7 +14,7 @@ Below that boolean expression, add another boolean expression that checks if the
 You should have a boolean expression that checks if the player's `x` position is less than or equal to the sum of the platform's `x` position and the platform's width minus one third of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
index 83e043cd365..71da6776b76 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
@@ -16,21 +16,21 @@ Below that, add another boolean expression that checks if the player's `y` posit
 You should not alter the existing `platformDetectionRules` array and its content.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position plus the player's height is greater than or equal to the platform's `y` position.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position is less than or equal to the sum of the platform's `y` position plus the platform's height.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\]\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
index 2ddaacd2873..9384c029896 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
@@ -19,21 +19,21 @@ Your `CheckPoint` class should have a `draw` method.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{/);
 ```
 
 Your `draw` method should have a `fillStyle` property.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
 ```
 
 Your `draw` method should have a `fillRect` method.
 
 ```js
 const splitter = code.split('#f1be32')
-assert.match(splitter[1], /ctx\.fillRect\(this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\);?/);
+assert.match(splitter[1], /ctx\.fillRect\(\s*this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
index b6383fda5b3..a6a53b8147f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
@@ -25,14 +25,14 @@ assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\([^
 Your callback function should have a `checkpoint` parameter.
 
 ```js
-assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*[^)]*\s*\)\s*;?/);
+assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*[^)]*\s*\)\s*;?/);
 
 ```
 
 You should implicitly return a new `CheckPoint` instance.
 
 ```js
-assert.match(code, /\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
+assert.match(code, /\s*checkpointPositions\.map\s*\(\s*(\(checkpoint\s*\)|checkpoint)\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
index 958ab32546d..0d59a1beefd 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
@@ -24,13 +24,13 @@ assert.match(code, /\bcheckpoints\b\s*\.\s*forEach\s*\(/s);
 You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*checkpoint\s*=>\s*{/s);
+assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*{?/s);
 ```
 
 You should call the `draw` method on each `checkpoint` inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\.forEach\s*\(\s*checkpoint\s*=>\s*{\s*checkpoint\.draw\(\s*\);?\s*}\s*\);?/s);
+assert.match(code, /\s*checkpoints\.forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*(\{\s*checkpoint\.draw\(\s*\)\s*;?\s*\}|checkpoint\.draw\(\s*\))\s*\)\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
index 1a3c1ec5db1..a65cfccdeee 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
@@ -24,7 +24,7 @@ You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
 const splitter = code.split("if (keys.rightKey.pressed && isCheckpointCollisionDetectionActive)")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(?checkpoint\)?\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*\{/);
 ```
 
 You should use the subtraction assignment operator to subtract 5 from the `checkpoint`'s `x` position.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
index b9dc0485583..228e7b84d42 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
@@ -42,7 +42,7 @@ assert.match(code, /\s*setTimeout\s*\(\s*\(\s*\)\s*=>[^,]*,\s*2000\s*\)/s);
 Your callback function should set the `checkpointScreen` `display` property to `none`.
 
 ```js
-assert.match(code, /\s*if\s*\(isCheckpointCollisionDetectionActive\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
+assert.match(code, /\s*if\s*\(\s*isCheckpointCollisionDetectionActive\s*\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
index bf633026269..a0eb2e38d14 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
@@ -24,7 +24,7 @@ Your callback function should have a `checkpoint` parameter and `index`.
 
 ```js
 const splitter = code.split("player.velocity.y = gravity;")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(checkpoint,\s*index\)\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*\(\s*checkpoint,\s*index\s*\)\s*=>\s*\{/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
index 2532066bc18..c77323fc83f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
@@ -14,7 +14,7 @@ Inside the `if` statement, call the `claim` method on the `checkpoint` object.
 You should call the `claim()` method on the `checkpoint` object.
 
 ```js
-assert.match(code, /checkpoint\.claim\(\);?/)
+assert.match(code, /checkpoint\.claim\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
index 9cd4d80a757..ac5303f9083 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
@@ -24,7 +24,7 @@ assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\
 You should call the `showCheckpointScreen` function and pass in "You reached the final checkpoint!" as an argument.
 
 ```js
-assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\);?/)
+assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(\s*("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\s*\);?/)
 ```
 
 You should call the `movePlayer` function and pass in the provided arguments.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
index 1cd13381760..081ee6a9de2 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
@@ -18,37 +18,37 @@ Begin by accessing the `task-form`, `confirm-close-dialog`, and `open-task-form-
 You should use `getElementById()` to access the `task-form` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should assign the `task-form` element to the variable `taskForm`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `confirm-close-dialog` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should assign the `confirm-close-dialog` element to the variable `confirmCloseDialog`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `open-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `open-task-form-btn` element to the variable `openTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
index 55a3f113322..cdf2fc65d3e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
@@ -14,37 +14,37 @@ You need to access more elements with the `getElementById()` method. This time y
 You should use `getElementById()` to access the `close-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `close-task-form-btn` element to the variable `closeTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `add-or-update-task-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should assign the `add-or-update-task-btn` element to the variable `addOrUpdateTaskBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `cancel-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 You should assign the `cancel-btn` element to the variable `cancelBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
index a1b2a99f01a..1ff82e50469 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
@@ -14,37 +14,37 @@ Next, access the `discard-btn`, `tasks-container`, and `title-input` elements us
 You should use `getElementById()` to access the `discard-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should assign the `discard-btn` element to the variable `discardBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `tasks-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should assign the `tasks-container` element to the variable `tasksContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `title-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 You should assign the `title-input` element to the variable `titleInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
index 71d97a0dde0..cb297a7f3f1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
@@ -14,25 +14,25 @@ The last set of elements you need to get from the HTML file are the `date-input`
 You should use `getElementById()` to access the `date-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should assign the `date-input` element to the variable `dateInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `description-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 You should assign the `description-input` element to the variable `descriptionInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
index 19c98917b06..7933e8de6df 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
@@ -13,16 +13,40 @@ Use `let` to create a `currentTask` variable and set it to an empty object. This
 
 # --hints--
 
-You should create a `taskData` constant set to an empty array.
+You should have a `const` variable called `taskData`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=/)
 ```
 
-You should use `let` to create an empty `currentTask` object.
+You should assign an array to your `taskData` constant.
 
 ```js
-assert.match(code, /let\s+currentTask\s*=\s*\{\};?/)
+assert.isArray(taskData);
+```
+
+Your `taskData` array should be empty.
+
+```js
+assert.isEmpty(taskData);
+```
+
+You should use `let` to create a `currentTask` variable.
+
+```js
+assert.match(code, /let\s+currentTask/);
+```
+
+You should assign an object to your `currentTask` variable.
+
+```js
+assert.isObject(currentTask);
+```
+
+Your `currentTask` object should be empty.
+
+```js
+assert.isEmpty(currentTask);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
index 924b24caf63..5b535515ae3 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
@@ -7,9 +7,15 @@ dashedName: step-7
 
 # --description--
 
-Add a `click` event listener to the `closeTaskFormBtn` variable, then use the `showModal()` method on your `confirmCloseDialog` variable. This will display a modal with the `Discard` and `Cancel` buttons.
+The HTML `dialog` element has a `showModal()` method that can be used to display a modal dialog box on a web page.
 
-`showModal()` is a method associated with the HTML `dialog` element. It is used to display a modal dialog box on a web page.
+```js
+dialogElement.showModal();
+```
+
+Add an event listener to the `closeTaskFormBtn` variable and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `showModal()` method on the `confirmCloseDialog` element. This will display a modal with the `Discard` and `Cancel` buttons.
 
 # --hints--
 
@@ -22,13 +28,13 @@ assert.match(code, /closeTaskFormBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `showModal()` method on `confirmCloseDialog`.
+Your event listener's callback function should call the `showModal()` method on the `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1,\s*\(.*\)\s*=>\s*{?\s*confirmCloseDialog\.showModal\(\);?\s*}?\s*\);?/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1,\s*\(.*\)\s*=>\s*(\{\s*confirmCloseDialog\.showModal\(\s*\)\s*;?\s*\}|confirmCloseDialog\.showModal\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
index d371b477a61..53e8161dfec 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
@@ -7,11 +7,15 @@ dashedName: step-8
 
 # --description--
 
-If the user clicks the `Cancel` button, you want to cancel the process (close the modal showing the two buttons) so the user can continue editing.
+If the user clicks the `Cancel` button, you want to cancel the process and close the modal so the user can continue editing. The HTML `dialog` element has a `close()` method that can be used to close a modal dialog box on a web page.
 
-Add a `click` event listener to the `cancelBtn` element, then use the `close()` method on the `confirmCloseDialog` variable.
+```js
+dialogElement.close();
+```
 
-`close()` is a method of the window object you can use to close the current window, or a modal you create with the `dialog` element.
+Add an event listener to the `cancelBtn` element and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `close()` method on the `confirmCloseDialog` element.
 
 # --hints--
 
@@ -24,13 +28,13 @@ assert.match(code, /cancelBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `close()` method on `confirmCloseDialog`. Don't use curly braces.
+Your event listener's callback function should call the `close()` method on `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1\,\s*\(\)\s*\s*=>\s*confirmCloseDialog\.close\(\)\s*\);?/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1\s*\,\s*\(\s*\)\s*=>\s*(\{\s*confirmCloseDialog\.close\(\s*\)\s*;?\s*\}|confirmCloseDialog\.close\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
index b96e5faf187..1b75e4554e5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
@@ -28,19 +28,19 @@ assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1/)
 You should use arrow syntax to set your event listener to an empty pair of curly braces.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 Your event listener should use the `close()` method on `confirmCloseDialog`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?/)
 ```
 
 Your event listener should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
index 95032f8381f..c86980fa610 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
@@ -22,19 +22,19 @@ assert.match(code, /taskForm\.addEventListener\(/)
 Your event listener should listen for a `submit` event.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1/)
 ```
 
 You should use arrow syntax to set your event listener to an empty pair of curly braces with `e` as the parameter.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
 ```
 
 You should use the `e.preventDefault()` method to stop the browser from reloading the page.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\);?/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
index e3ba1abaff8..212a801a209 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
@@ -35,13 +35,13 @@ assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 You should pass in `item` as the parameter of the arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === currentTask.id`.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
index c376b042699..d8869d04f13 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
@@ -30,19 +30,19 @@ assert.match(code, /const\s+taskObj\s*=\s*\{\s*id/)
 You should use template strings to get `titleInput.value` as the value of your `id` key and convert it to lowercase.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)/)
 ```
 
 You should use `.split(' ')` on `titleInput.value.toLowerCase()`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(('|")\s{1}\1\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)/)
 ```
 
 You should use `.join('-')` on `titleInput.value.toLowerCase().split(' ')`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
index 9ce9f86e3c0..0d842d8a8f1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
@@ -20,13 +20,13 @@ Create an `if` statement with the condition `dataArrIndex === -1`. Within the `i
 You should create an `if` statement with the condition `dataArrIndex === -1`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{/)
 ```
 
 Your `if` statement should have `taskData.unshift(taskObj)` in it's body.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}/)
 ```
 
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
index 9826fa47c55..7ea656a26ea 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
@@ -26,7 +26,7 @@ assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*(\s*\{?\(\s*ta
 You should use addition assignment to set the `innerHTML` of `tasksContainer` to an empty pair of backticks.
 
 ```js
-assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\)?\s*\}?)/)
+assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\s*\)?\s*\}?)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
index ed2632a0927..b61a7de610b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
@@ -15,7 +15,7 @@ You should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("taskData.forEach")[1].split("});")
-assert.match(splitter[0], /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(splitter[0], /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
index 381a5bd86d6..592328d7f7e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
@@ -18,13 +18,13 @@ Use arrow syntax to create a `reset` function and set it to a pair of curly brac
 You should use `const` and arrow syntax to create a `reset` function.
 
 ```js
-assert.match(code, /const\s+reset\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+reset\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 Your `reset` function should be empty.
 
 ```js
-assert.match(reset.toString(), /\(\)\s*\{\s*\}/);
+assert.match(reset.toString(), /\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
index 7459a3414a8..f476bdff634 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
@@ -34,7 +34,7 @@ assert.match(reset.toString(), /descriptionInput\.value\s*=\s*('|")\1;?/)
 You should use `classList` to toggle the class `hidden` on `taskForm`
 
 ```js
-assert.match(reset.toString(), /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(reset.toString(), /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 You should set `currentTask` to an empty object.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
index 4a13ed644b2..d72007eb33f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the `hidden` class on `taskForm`.
 
 ```js
 const splitter = code.split('<button type="button" class="btn">Delete</button>')
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /reset\(\)/)
+assert.match(code, /reset\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
index 55be02c0a86..197eca232bf 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("confirmCloseDialog.close();")
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /confirmCloseDialog\.close\(\);?\s*reset\(\);?/)
+assert.match(code, /confirmCloseDialog\.close\(\s*\);?\s*reset\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
index c026a492342..eebe042d9c6 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
@@ -16,7 +16,7 @@ To begin, within the `closeTaskFormBtn` event listener, create a `formInputsCont
 You should use `const` to create a variable `formInputsContainValues` with the value `titleInput.value || dateInput.value || descriptionInput.value;`
 
 ```js
-assert.match(code, /const\s+formInputsContainValues\s*=\s*titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value;?/)
+assert.match(code, /const\s+formInputsContainValues\s*=\s*(titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value|titleInput\.value\s*!==\s*null\s*\|\|\s*dateInput\.value\s*!==\s*null\s*\|\|\s*descriptionInput\.value\s*!==\s*null)\;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
index 75f8b96764c..35bfe574d4b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
@@ -14,25 +14,25 @@ Create an `if` statement to check if `formInputsContainValues` is true. If `form
 You should create an `if` statement with the condition `formInputsContainValues`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{/)
 ```
 
 The `if` block of your `if` statement should contain `confirmCloseDialog.showModal();`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `reset()` function in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{\s*reset\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{\s*reset\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
index 907d861c83c..91c713f2626 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
@@ -16,7 +16,7 @@ Use arrow syntax to create an `addOrUpdateTask` function. Then move the `dataArr
 You should use `const` and arrow syntax to create an `addOrUpdateTask` function.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should move the `dataArrIndex` variable into the `addOrUpdateTask` function.
@@ -31,7 +31,7 @@ You should move the `taskObj` object into the `addOrUpdateTask` function.
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?/)
 ```
 
-You should move the `if` statement with the condition `dataArrIndex === 1` into your `addOrUpdateTask` function.
+You should move the `if` statement with the condition `dataArrIndex === -1` into your `addOrUpdateTask` function.
 
 ```js
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s*===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?\s*if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\)\s*;?\s*\}\s*\}\s*;?/)
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
index 0195ce1b455..e97896f0562 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
@@ -14,13 +14,13 @@ Use arrow syntax to create an `updateTaskContainer` function. Then move the `tas
 You should use `const` and arrow syntax to create a `updateTaskContainer` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 You should move `taskData.forEach()` and its content into the `updateTaskContainer()` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\{\s*id,\s*title,\s*date,\s*description\s*\}\)\s*=>\s*{\s*\(tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\)\s*}\s*\);?\s*\};?/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\s*\{\s*id,\s*title,\s*date,\s*description\s*\}\s*\)\s*=>\s*{\s*\(\s*tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\s*\)\s*}\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
index 97ac877a624..81a292e232e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
@@ -14,13 +14,13 @@ Inside the `addOrUpdateTask` function, call the `updateTaskContainer` and `reset
 You should call the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\)\s*/)
+assert.match(code, /updateTaskContainer\(\s*\)\s*/)
 ```
 
 You should call the `reset` function after calling the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\);?\s*reset\(\);?\s*/)
+assert.match(code, /updateTaskContainer\(\s*\);?\s*reset\(\s*\);?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
index 124e6a6c38d..cbc27a68250 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
@@ -14,7 +14,7 @@ Now remove the `reset()` call inside the `taskForm` submit event listener and ca
 You should remove `reset()` and call `addOrUpdateTask()`.
 
 ```js
-assert.match(code, /addOrUpdateTask\(\)/)
+assert.match(code, /addOrUpdateTask\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
index 2dc491c2ee7..60d5197cad5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
@@ -13,16 +13,16 @@ To enable editing and deleting for each task, add an `onclick` attribute to both
 
 # --hints--
 
-You should add `onclick="editTask(this)"` as the first attribute of the edit button.
+You should add `onclick="editTask(this)"` to your edit button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")editTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3\s*>Edit<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')editTask\(\s*this\s*\)\1)[^>]*>Edit<\/button>/);
 ```
 
-You should add `onclick="deleteTask(this)"` as the first attribute of the delete button.
+You should add `onclick="deleteTask(this)"` to your delete button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")deleteTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3>Delete<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')deleteTask\(\s*this\s*\)\1)[^>]*>Delete<\/button>/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
index d13f498670a..2890f12eb03 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable and set its value using the `findIndex()` metho
 You should not alter the `deleteTask` function.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
index 5d45f27166d..ff143656f84 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
@@ -30,7 +30,7 @@ Use the `remove()` method to remove the `parentElement` of the `buttonEl` from t
 You should use the `remove()` method to remove the parent element of `buttonEl`.
 
 ```js
-assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\);?/)
+assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\s*\);?/)
 ```
 
 You should use `splice()` on the `taskData` array.
@@ -42,13 +42,13 @@ assert.match(deleteTask.toString(), /taskData\.splice\(/)
 The first argument of your `splice()` method should be `dataArrIndex`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex/)
 ```
 
 The second argument of your `splice()` method should be `1`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex,\s*1\);?/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex,\s*1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
index 0312e586831..6b07be445b1 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable. For its value, utilize the `findIndex()` metho
 You should not alter the `editTask` function.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
index 16924a55874..55477d4d682 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
@@ -14,7 +14,7 @@ Use square bracket notation to retrieve the task to be edited from the `taskData
 You should assign `taskData[dataArrIndex]` to `currentTask`.
 
 ```js
-assert.match(code, /currentTask\s*=\s*taskData\[dataArrIndex\];?/)
+assert.match(code, /currentTask\s*=\s*taskData\s*\[\s*dataArrIndex\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
index 14221eb71f2..10c3afc6730 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
@@ -14,13 +14,13 @@ At this point, editing a task won't reflect when you submit the task. To make th
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 Your `else` block should have the code `taskData[dataArrIndex] = taskObj`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*taskData\[dataArrIndex\]\s*=\s*taskObj;?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*taskData\s*\[\s*dataArrIndex\s*\]\s*=\s*taskObj;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
index 1a9b80fa740..1b263e39fd3 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
@@ -26,13 +26,13 @@ After that, open your browser console and go to the `Applications` tab, select `
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 Your `localStorage.setItem()` should have a value of `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*myTaskArr\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*myTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
index fcb9a2baf61..c7c3db85a9d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
@@ -16,13 +16,13 @@ To resolve the issue, wrap the data you're saving in the `JSON.stringify()` meth
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 You should wrap `JSON.stringify()` around `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*JSON\.stringify\(myTaskArr\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*JSON\.stringify\(\s*myTaskArr\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
index fcc8050f208..4689fab4bb8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
@@ -16,13 +16,13 @@ Use the `getItem()` method to retrieve the `myTaskArr` array and assign it to th
 You should use `const` to create a `getTaskArr` variable and assign `localStorage.getItem("data")` to it.
 
 ```js
-assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(('|")data\1\);?/)
+assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\1\s*\);?/)
 ```
 
 You should log the `getTaskArr` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArr\);?/)
+assert.match(code, /console\.log\(\s*getTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
index f42992ca957..aad78d1f885 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
@@ -18,13 +18,13 @@ Check the console to see the difference between `getTaskArr` and `getTaskObj`.
 You should use `const` to create a `getTaskArrObj` variable and assign it to `JSON.parse(localStorage.getItem('data'));`.
 
 ```js
-assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\);?/)
+assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\);?/)
 ```
 
 You should log the `getTaskArrObj` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArrObj\);?/)
+assert.match(code, /console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
index 77c8a4e217e..5593625b0f2 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
@@ -16,7 +16,7 @@ Remove the `data` item from local storage and open the console to observe the re
 You should use `localStorage.removeItem()` to remove the `data` item from the browser's local storage.
 
 ```js
-assert.match(code, /localStorage\.removeItem\(('|")data\1\);?/)
+assert.match(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
index 275a66c6a66..98834aea6de 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
@@ -16,13 +16,13 @@ Remove `localStorage.removeItem()` and use `localStorage.clear()` instead. You d
 You should remove `localStorage.removeItem("data")`.
 
 ```js
-assert.notMatch(code, /localStorage\.removeItem\(('|")data\1\);/)
+assert.notMatch(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);/)
 ```
 
 You should remove everything from the browser `local storage` with `localStorage.clear()`.
 
 ```js
-assert.match(code, /localStorage\.clear\(\);?/)
+assert.match(code, /localStorage\.clear\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
index 57ad285cc26..b48c85fb67e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
@@ -14,7 +14,7 @@ Remove the `myTaskArr` array and all of the code for `localStorage` because you
 You should remove `myTaskArr` and all the code related to `localStorage` that you've just learned.
 
 ```js
-assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s"Walk\s*the\s*Dog",\s*date:\s*"22-04-2022"\s*\},\s*\{\s*task:\s"Read\s*some\s*books",\s*date:\s*"02-11-2023"\s*\},\s*\{\s*task:\s"Watch\s*football",\s*date:\s*"10-08-2021"\s*\},\s*\];?\s*localStorage\.setItem\("data", JSON\.stringify\(myTaskArr\)\);\s*localStorage\.clear\(\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\("data"\)\s*console\.log\(getTaskArr\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\("data"\)\);?\s*console\.log\(getTaskArrObj\);?/)
+assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s('|")Walk\s*the\s*Dog\1,\s*date:\s*('|")22-04-2022\2\s*\},\s*\{\s*task:\s('|")Read\s*some\s*books\3,\s*date:\s*('|")02-11-2023\4\s*\},\s*\{\s*task:\s('|")Watch\s*football\5,\s*date:\s*('|")10-08-2021\6\s*\},\s*\]\s*;?\s*localStorage\.setItem\(('|")data\7, JSON\.stringify\(\s*myTaskArr\s*\)\s*\);\s*localStorage\.clear\(\s*\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\8\s*\)\s*console\.log\(\s*getTaskArr\s*\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\9\s*\)\s*\);?\s*console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
@@ -316,7 +316,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -346,7 +346,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
index a4f12345661..e93bf278d33 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
@@ -24,13 +24,13 @@ assert.match(code, /localStorage\.setItem\(/)
 You should pass in `"data"` as the first argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
index a3da0befcc4..e36f28fe615 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
@@ -24,14 +24,14 @@ You should pass in `"data"` as the first argument of your `localStorage.setItem(
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
index b0d0f5c2b33..e86d40a0549 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
@@ -16,7 +16,7 @@ Set `taskData` to the retrieval of `data` from local storage **or** an empty arr
 You should set the `taskData` variable to `JSON.parse(localStorage.getItem("data")) || [];`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\)\s*\|\|\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\)\s*\|\|\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -321,7 +321,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -352,7 +352,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
index 69d02f6d09f..a2ab37d2834 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
@@ -20,13 +20,13 @@ With that, you've completed this project.
 You should create an `if` statement with `(taskData.length)` as the condition. As a reminder, `0` is a falsy value.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*/)
 ```
 
 You should call the `updateTaskContainer` function in your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*updateTaskContainer\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*updateTaskContainer\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
index 5adf8d511fe..04fb5326ec9 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
@@ -20,7 +20,7 @@ console.log(Date.now()); // 1628586800000
 You should attach `-${Date.now()}` to the existing value of the `id` key. Don't forget it needs to be inside the template string.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
index bfb11050621..f21fcdc5ab2 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
@@ -1,32 +1,18 @@
 ---
 id: 63e02a333354343b595d64ca
-title: 步驟 16
+title: Step 15
 challengeType: 0
-dashedName: step-16
+dashedName: step-15
 ---
 
 # --description--
 
-Now that you have tested the `Object.freeze()` method, you can delete those two lines of code from the last lesson.
-
 The next step is to access the key called `sport` from the `myFavoriteFootballTeam` object and assign it to a new `const` variable called `sport`.
 
 Remember you can use dot notation for this.
 
 # --hints--
 
-You should remove your assignment of the `USA` string to `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /myFavoriteFootballTeam\.team\s*=\s*('|"|`)USA\1\s*/);
-```
-
-You should remove your `console.log` for `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /console\.log\(\s*myFavoriteFootballTeam\.team\s*\)/);
-```
-
 You should use `const` to declare a `sport` variable.
 
 ```js
@@ -462,8 +448,6 @@ Object.freeze(myFavoriteFootballTeam);
 
 --fcc-editable-region--
 
-myFavoriteFootballTeam.team = "USA";
-console.log(myFavoriteFootballTeam.team);
 
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
index 9815fa204b9..d9520c64e56 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
@@ -1,8 +1,8 @@
 ---
 id: 63e0334b7a24bd3c96aca4de
-title: Step 17
+title: Step 16
 challengeType: 0
-dashedName: step-17
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
index 5992556819c..e556c5c05e3 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e036373fc9173d284e165a
-title: 步驟 18
+title: Step 17
 challengeType: 0
-dashedName: step-18
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
index 15841e7a815..2a8ea3b0d0b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
@@ -1,8 +1,8 @@
 ---
 id: 63e03b86008bbb3e1c3de846
-title: 步驟 19
+title: Step 18
 challengeType: 0
-dashedName: step-19
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
index 518f38259da..32ae955337d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
@@ -1,8 +1,8 @@
 ---
 id: 63e042661ad2663f0d468740
-title: 步驟 20
+title: Step 19
 challengeType: 0
-dashedName: step-20
+dashedName: step-19
 ---
 
 # --description--
@@ -15,7 +15,7 @@ Use object destructuring to access the `coachName` value.
 
 ```js
 
-assert.match(code, /const\s*{\s*coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach\s*/)
+assert.match(code, /const\s*{\s*(coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach|headCoach\s*:\s*{\s*coachName\s*}\s*}\s*=\s*myFavoriteFootballTeam)\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
index edfaa2d372e..ed536a4b70e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
@@ -1,8 +1,8 @@
 ---
 id: 63e050bf935ac341b88326d6
-title: 步驟21
+title: Step 20
 challengeType: 0
-dashedName: step-21
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
index 2dc9914f5e7..3562608e3f9 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05557016dfd45ea49152c
-title: 步驟 22
+title: Step 21
 challengeType: 0
-dashedName: step-22
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
index 88b2b0776d7..70772e4cba9 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05c00b615bb46ac87273a
-title: 步驟-23
+title: Step 22
 challengeType: 0
-dashedName: step-23
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
index 6e21d2b57fb..862d6c0fd77 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
@@ -1,8 +1,8 @@
 ---
 id: 63e060df21bca347b2d2b374
-title: 步驟 24
+title: Step 23
 challengeType: 0
-dashedName: step-24
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
index 6594c03efca..5ea194d88aa 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e062d6090ebb486a4eda3a
-title: 步驟 25
+title: Step 24
 challengeType: 0
-dashedName: step-25
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
index 226083ee1af..5cd7ea1d6e4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
@@ -1,8 +1,8 @@
 ---
 id: 63e949b8327aa2aca2ca8eac
-title: 步驟 26
+title: Step 25
 challengeType: 0
-dashedName: step-26
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
index db1166825df..b13000896fc 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
@@ -1,8 +1,8 @@
 ---
 id: 63e94dae6dcedbad73f2f6ee
-title: 步驟 27
+title: Step 26
 challengeType: 0
-dashedName: step-27
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
index 77d044f5828..dbeb80c7a4c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
@@ -1,8 +1,8 @@
 ---
 id: 63e954321b0a77ae4f6d9650
-title: 第 28 步
+title: Step 27
 challengeType: 0
-dashedName: step-28
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
index 7b6f5b9cbcf..3912e0e6228 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95a45dce95baf41dd4f78
-title: 步驟 29
+title: Step 28
 challengeType: 0
-dashedName: step-29
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
index 4116e33fdbb..9a21ae45f28 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95e39860dc5b01ebe9be0
-title: 第 30 步
+title: Step 29
 challengeType: 0
-dashedName: step-30
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
index 7c5f0377564..e037852b3bc 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9667c881b61b1e338d276
-title: 步驟 31
+title: Step 30
 challengeType: 0
-dashedName: step-31
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
index 1e5757ac30a..20e68b6415e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96938d2a347b2734a1587
-title: 步驟 32
+title: Step 31
 challengeType: 0
-dashedName: step-32
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
index 12ff49f3d65..eb225b3116c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96eb94c97b6b31ee50f63
-title: 步驟 33
+title: Step 32
 challengeType: 0
-dashedName: step-33
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
index d6eff70d606..401f8fcb289 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9718d7d490bb3940d5a0a
-title: 步驟 34
+title: Step 33
 challengeType: 0
-dashedName: step-34
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
index 60299850bcc..e2cf0d8bbea 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9737f686c76b4078a60f4
-title: 步驟 35
+title: Step 34
 challengeType: 0
-dashedName: step-35
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
index 8de254e70e6..0544b4bdd11 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28972973504e7bb58b0b3
-title: 步驟 36
+title: Step 35
 challengeType: 0
-dashedName: step-36
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
index c2cb1e432f3..91426574c6f 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28ef082d771e8bf71f94a
-title: 步驟 37
+title: Step 36
 challengeType: 0
-dashedName: step-37
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
index 11ab3d04de5..9ad6aab3caa 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
@@ -1,8 +1,8 @@
 ---
 id: 63f293c804d6f9e9a83ca4c5
-title: 步驟 38
+title: Step 37
 challengeType: 0
-dashedName: step-38
+dashedName: step-37
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Open the console, and make a selection from the teammates dropdown menu. You sho
 You should add a `console.log` with the value of `e.target.value`.
 
 ```js
-assert.match(code, /console\.log\s*\(e\.target\.value\)\s*/)
+assert.match(code, /console\.log\s*\(\s*e\.target\.value\s*\)\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
index 22d4f1385ae..f95cf6e5d4b 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29804e3ec00ea6fab1ec4
-title: 步驟 39
+title: Step 38
 challengeType: 0
-dashedName: step-39
+dashedName: step-38
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Inside the callback function, access the `innerHTML` property of the `playerCard
 You should not have the `console.log` statement in your code.
 
 ```js
-assert.notMatch(code, /\s*console\.log\(e\.target\.value\)/);
+assert.notMatch(code, /\s*console\.log\(\s*e\.target\.value\s*\)/);
 ```
 
 You should access the `innerHTML` property of the `playerCards` element.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
index c1c62d7fbfc..134d1331364 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29ce62aea65eb041758c8
-title: 步驟 40
+title: Step 39
 challengeType: 0
-dashedName: step-40
+dashedName: step-39
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /switch\s*\(\s*e\.target\.value\s*\)/);
 Your `switch` statement should be empty.
 
 ```js
-assert.match(code, /\s*switch\s*\(e\.target\.value\)\s*{\s*}/);
+assert.match(code, /\s*switch\s*\(\s*e\.target\.value\s*\)\s*{\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
index 04802f3e3b2..a3caf074b5c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a0a860790eebe61bf908
-title: 步驟 41
+title: Step 40
 challengeType: 0
-dashedName: step-41
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
index 71429bd157a..303dace84dc 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a4a8087e6dec8ec47f16
-title: 步驟 44
+title: Step 43
 challengeType: 0
-dashedName: step-44
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
index 229f69cd0e3..b66de0298ec 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a5f09a785aed155c0a56
-title: 步驟 45
+title: Step 44
 challengeType: 0
-dashedName: step-45
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
index 027a3f624c4..f6cb13c7bc5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a8e14fb388edd3242527
-title: 步驟 46
+title: Step 45
 challengeType: 0
-dashedName: step-46
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
index a3888dcccf9..3ff1f2396c8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2aa36fcdc63ee4e18fc37
-title: 步驟 47
+title: Step 46
 challengeType: 0
-dashedName: step-47
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
index 113f10447fd..0543e8d3b98 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2ab4f6c52c5eec6d68de4
-title: 步驟 48
+title: Step 47
 challengeType: 0
-dashedName: step-48
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
index 001fd876f71..6cd48c0e9a8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
@@ -1,8 +1,8 @@
 ---
 id: 641fc88d8fa7127f76e0324f
-title: 步驟 42
+title: Step 41
 challengeType: 0
-dashedName: step-42
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
index 389fbd01e76..11c8298ac82 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
@@ -1,8 +1,8 @@
 ---
 id: 641fcfd468185384ac218b7d
-title: 第 43 步
+title: Step 42
 challengeType: 0
-dashedName: step-43
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
index a7d3e4e0f6a..39dc45db82e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-After alerting the user if the number input is empty of the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
+After alerting the user if the number input is empty or the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
 
 Add the `return` keyword after `alert()`.
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
index 6cc35163a68..3721047b281 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
@@ -24,7 +24,6 @@ Use the `.reverse()` method to reverse the order of the `remainders` array, and
 You should use the `.reverse()` method on the `remainders` array.
 
 ```js
-console.log(String(decimalToBinary))
 assert.match(String(decimalToBinary), /remainders\.reverse\(\s*\)/);
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
index a62edf1aaca..a502cc6a9ed 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
@@ -31,7 +31,7 @@ assert.notMatch(String(decimalToBinary), /else\s+if\s*\([\s\S]+\)/);
 Your `decimalToBinary()` function should have an `if` statement that checks if `input` is equal to `0` or `1`.
 
 ```js
-assert.match(String(decimalToBinary), /if\s*\(input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
+assert.match(String(decimalToBinary), /if\s*\(\s*input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(\s*input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
 ```
 
 If input is equal to `0` or `1`, your `decimalToBinary()` function should return `String(input)`.
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
index d76920a6317..c44378fda20 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
@@ -44,7 +44,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1000` as the second argument to the `setTimeout` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
index 98abf9da188..310b186ef7c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
@@ -48,7 +48,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
index e589ca1d81a..c002e38bacb 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
@@ -46,7 +46,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
index dde66ffba42..28f5f01ac72 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the `id` attribute to the `inputVal`
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
index eaf220bfc98..0c0f486d5c3 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the text of the paragraph element to
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
index 718e0195632..5e49c77053d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `showMsgDelay` property of the c
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)showMsgDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)showMsgDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
index ca1cfc02dc8..d5362882cb7 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
@@ -18,7 +18,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
index 2ceea4a29a4..7f5984b00d8 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
@@ -27,7 +27,7 @@ You should set the `textContent` property of the targeted element equal to the `
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\[\s*('|"|`)\s*msg\s*\1\s*\]/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\s*\[\s*('|"|`)\s*msg\s*\1\s*\]/
 );
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
index f3f4ec102de..aa1639d72e7 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `removeElDelay` property of the
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)removeElDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)removeElDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
index 6f0acc8a458..29f45ae7fc9 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
@@ -16,7 +16,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.lengthOf(
   String(showAnimation).match(
-    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
+    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
   ),
   2
 );
@@ -27,7 +27,7 @@ You should chain the `.remove()` method to the `.getElementById()` method.
 ```js
 assert.match(
   String(showAnimation),
-  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
+  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
 );
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
index 6820263e7aa..617fb32b856 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
@@ -18,7 +18,7 @@ You should set the `textContent` property of `result` equal to calling `decimalT
 ```js
 assert.match(
   String(showAnimation),
-  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\[('|"|`)textContent\1\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
+  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\s*\[\s*('|"|`)textContent\1\s*\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
 );
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
index 4e574cdbdc2..4a6b57e655a 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
@@ -9,9 +9,9 @@ dashedName: step-5
 
 Back in your event listener, you need to update the text of the `result` element.
 
-Use a ternary operator to update the text of the `result` element after the `if` statement. Check the truthiness of calling `isSpam()` on the value of the `messageInput` element. If true, set the text to `Oh no! This looks like a spam message.`. Otherwise, set the text to `This message does not seem to contain any spam.`
+After the `if` statement, use a ternary operator to check the truthiness of calling `isSpam()` with `messageInput.value` as the argument. If true, set the `textContent` property on the `result` element to `Oh no! This looks like a spam message.`. Otherwise, set it to `This message does not seem to contain any spam.`
 
-Then set the `messageInput` element's value to an empty string.
+Then set the `messageInput` element's `value` property to an empty string.
 
 # --hints--
 
@@ -21,10 +21,10 @@ You should use the assignment operator to set the `textContent` property of the
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*/)
 ```
 
-You should assign the `isSpam()` function call to `result.textContent`.
+You should call the `isSpam()` function after the assignment operator `=` and before the `?` ternary operator.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(.*\)\s*\?/)
 ```
 
 You should use ternary syntax to check the truthiness of `isSpam(messageInput.value)`.
@@ -45,10 +45,10 @@ The falsy expression of your ternary should set the `textContent` property of th
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*/);
 ```
 
-After your ternary, set the `value` of `messageInput` to an empty string.
+After your ternary, set the `value` property on the `messageInput` element to an empty string.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5\s*;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
index 9b212cc5f6b..6b99aacfc6e 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
@@ -24,13 +24,13 @@ assert.match(code, /const\s+currentDateParagraph\s+=/);
 You should use `document.getElementById()` to get the `#current-date` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)current-date\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)current-date\1\s*\)/);
 ```
 
 You should assign the `#current-date` element to your `currentDateParagraph` variable.
 
 ```js
-assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(('|"|`)current-date\1\)/g));
+assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(\s*('|"|`)current-date\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
index a661b54e0c4..1c42f9d8d20 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+dateOptionsSelectElement\s+=/);
 You should use `document.getElementById()` to get the `#date-options` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)date-options\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)date-options\1\s*\)/);
 ```
 
 You should assign the `#date-options` element to your `dateOptionsSelectElement` variable.
 
 ```js
-assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(('|"|`)date-options\1\)/g));
+assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(\s*('|"|`)date-options\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
index 41a4b27c6f1..769feab6a1d 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
@@ -32,7 +32,7 @@ assert.match(code, /const\s+date\s+=/);
 You should assign a `Date` object to your `date` variable with `new Date()`.
 
 ```js
-assert(code.match(/const\s+date\s+=\s+new\s+Date\(\)/g));
+assert(code.match(/const\s+date\s+=\s+new\s+Date\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
index ece454ff548..6abc56b31b2 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
@@ -30,7 +30,7 @@ assert.match(code, /const\s+day\s+=/);
 You should assign the `date.getDate()` to your `day` variable.
 
 ```js
-assert(code.match(/const\s+day\s+=\s+date\.getDate\(\)/g));
+assert(code.match(/const\s+day\s+=\s+date\.getDate\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
index 026be1b3883..491abd696d5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+month\s+=/);
 You should assign the `date.getMonth() + 1` to your `month` variable.
 
 ```js
-assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\)\s*\+\s*1/g));
+assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\s*\)\s*\+\s*1/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
index f5b77dba83b..195cb4bfc7c 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+year\s+=/);
 You should assign the `date.getFullYear()` to your `year` variable.
 
 ```js
-assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\)/g));
+assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
index 0e0901bb155..1d15d89a785 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+hours\s+=/);
 You should assign the `date.getHours()` to your `hours` variable.
 
 ```js
-assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\)/g));
+assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
index d9d872bb0d5..8181f2779b5 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+minutes\s+=/);
 You should assign the `date.getMinutes()` to your `minutes` variable.
 
 ```js
-assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\)/g));
+assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
index 31d9f4a9cb5..bb032e9f6a4 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
@@ -16,7 +16,7 @@ Open up the console and you should see the date printed out.
 You should have a `console.log(formattedDate)` line in your code.
 
 ```js
-assert.match(code, /console\.log\(formattedDate\)/);
+assert.match(code, /console\.log\(\s*formattedDate\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
index 65b0dde9313..30067328ece 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
@@ -22,7 +22,7 @@ assert(code.match(/currentDateParagraph\.textContent\s*=\s*formattedDate/g));
 You should not have a `console.log(formattedDate);` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(formattedDate\);/);
+assert.notMatch(code, /console\.log\(\s*formattedDate\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
index bcec57e1378..61cdf6a63db 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
@@ -15,11 +15,17 @@ element.addEventListener("change", () => {
 });
 ```
 
-Chain the `addEventListener` method to `dateOptionsSelectElement` where the first argument is `change` and the second argument is an empty arrow function.
+Attach the `addEventListener` method to the `dateOptionsSelectElement`. The first argument of the event listener should be the string `change` and the second argument should be an empty arrow function.
 
 # --hints--
 
-You should use the `addEventListener` method to add a `change` event listener to `dateOptionsSelectElement`.
+You should attach the `addEventListener` method to the `dateOptionsSelectElement`.
+
+```js
+assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(/g));
+```
+
+Your event listener should listen for a `change` event.
 
 ```js
 assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(\s*('|")change\1/g));
diff --git a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
index cef267f8a97..8dbcea03734 100644
--- a/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
+++ b/curriculum/challenges/chinese-traditional/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
@@ -22,7 +22,7 @@ Chain the `.reverse()` method to the end of `.split()` method.
 You should use the `.reverse()` method to reverse the order of the array returned by `.split()`.
 
 ```js
-assert(code.match(/\.reverse\(\)/g));
+assert(code.match(/\.reverse\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese-traditional/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md b/curriculum/challenges/chinese-traditional/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
index a721563d96d..1f1a60542e3 100644
--- a/curriculum/challenges/chinese-traditional/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
+++ b/curriculum/challenges/chinese-traditional/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
@@ -109,7 +109,6 @@ assert(getCorrectStyle()?.textAlign === 'center');
 # --seed--
 
 ## --seed-contents--
-
 ```css
 ```
 
diff --git a/curriculum/challenges/chinese-traditional/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md b/curriculum/challenges/chinese-traditional/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
index 6480354b9f3..cf7e94d0967 100644
--- a/curriculum/challenges/chinese-traditional/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
+++ b/curriculum/challenges/chinese-traditional/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
@@ -29,4 +29,4 @@ They are outdated technologies.
 
 ## --video-solution--
 
-1
+2
diff --git a/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md b/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md
index a837a683f26..8471a2da567 100644
--- a/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md
+++ b/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md
@@ -1,38 +1,38 @@
 ---
 id: 647e21598acb466c97ccbee1
-title: 'Challenge Project - Develop Branching and Looping Structures in C#'
+title: '挑戰項目 - 在 C# 中開發分支和循環結構'
 challengeType: 19
 dashedName: challenge-project-develop-branching-and-looping-structures-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+這個挑戰將有一部分在 Microsoft Learn 平臺上完成。 請按照如下說明來完成挑戰：
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/</a> and complete all the tasks for the "Challenge Project - Develop Branching and Looping Structures in C#" module. This is **required** to earn the "Add Logic to C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. 跳轉到 <a href="https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/</a>，然後完成“挑戰項目 - 在 C# 中開發分支和循環結構”模塊的所有任務。 這是在 Microsoft Learn 上獲得“向 C# 控制檯應用程序添加邏輯”的獎盃以及參加認證考試所**必需**的。
+1. 完成後，返回並正確回答下面的問題。
 
-# --assignment--
+# --任務--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/" target="_blank" rel="noreferrer">Develop Branching and Looping Structures in C#</a> challenge project on Microsoft Learn. Then, answer the question below.
+在 Microsoft Learn 上完成 <a href="https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/" target="_blank" rel="noreferrer">在 C# 中開發分支和循環結構</a> 的挑戰項目。 然後，回答下面的問題。
 
 # --question--
 
 ## --text--
 
-A developer needs to create an iteration statement. Under what condition is a `while` statement a better choice than a `do` statement?
+開發人員需要創建迭代語句。 在什麼條件下 `while` 語句比 `do` 語句更好？
 
 ## --answers--
 
-When the expression values evaluated by the iteration statement are unknown prior to the iteration code block.
+當迭代語句評估的表達式值在迭代代碼塊之前未知時。
 
 ---
 
-When the expression values evaluated by the iteration statement are known prior to the iteration code block.
+當迭代語句評估的表達式值在迭代代碼塊之前已知時。
 
 ---
 
-When the developer creates nested `do` or `while` loops.
+當開發人員創建嵌套的 `do` 或者 `while` 循環時。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md b/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md
index f1d60edd59a..6f18c8bc490 100644
--- a/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md
+++ b/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md
@@ -1,20 +1,20 @@
 ---
 id: 647e21708acb466c97ccbee3
-title: 'Evaluate Boolean Expressions to Make Decisions in C#'
+title: '在 C# 中評估布爾表達式以做出決策'
 challengeType: 19
 dashedName: evaluate-boolean-expressions-to-make-decisions-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+這個挑戰將有一部分在 Microsoft Learn 平臺上完成。 請按照如下說明來完成挑戰：
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/</a> and complete all the tasks for the "Evaluate Boolean Expressions to Make Decisions in C#" module. This is **required** to earn the "Add Logic to C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. 跳轉到 <a href="https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/</a>，然後完成“在 C# 中評估布爾表達式以做出決策”模塊的所有任務。 這是在 Microsoft Learn 上獲得“向 C# 控制檯應用程序添加邏輯”的獎盃以及參加認證考試所**必需**的。
+1. 完成後，返回並正確回答下面的問題。
 
-# --assignment--
+# --任務--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/" target="_blank" rel="noreferrer">Evaluate Boolean Expressions to Make Decisions in C#</a> module on Microsoft Learn. Then, answer the question below.
+在 Microsoft Learn 上完成 <a href="https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/" target="_blank" rel="noreferrer">在 C# 中評估布爾表達式以做出決策</a> 模塊。 然後，回答下面的問題。
 
 # --question--
 
diff --git a/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md b/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md
index 84642b155e8..b71c646f764 100644
--- a/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md
+++ b/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647f87dc07d29547b3bee1bf
-title: 'Trophy - Create and Run Simple C# Console Applications'
+title: '獎盃 - 創建和運行簡單的 C# 控制檯應用程序'
 challengeType: 18
 dashedName: trophy-create-and-run-simple-c-sharp-console-applications
 msTrophyId: learn.wwl.get-started-c-sharp-part-2.trophy
@@ -8,6 +8,6 @@ msTrophyId: learn.wwl.get-started-c-sharp-part-2.trophy
 
 # --description--
 
-Now that you've completed all of the "Create and Run Simple C# Console Applications" challenges, you should have earned the trophy for it on the Microsoft Learn platform. If you don't see this trophy when viewing <a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">your achievements page</a>, you have not completed all the tasks and your trophy cannot be verified.
+現在你已經完成了所有"創建並運行簡單的 C# 控制檯應用程序"的挑戰。你應該已經在 Microsoft Learn 平臺上獲得了獎盃。 如果你在查看 <a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">你的成就</a> 頁面時沒有看到該獎盃，那你尚未完成所有任務，獎盃也無法被認證。
 
-Link your Microsoft username to your freeCodeCamp account and click the "Verify Trophy" button below to complete the challenge. This trophy is **required** to qualify for the certification exam.
+將你的 Microsoft 用戶名鏈接到你的 freeCodeCamp 賬戶，然後點擊下面的“驗證獎盃”按鈕來完成挑戰。 這個獎盃是參加認證考試所**必需**的。
diff --git a/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/challenge-project-create-a-mini-game.md b/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/challenge-project-create-a-mini-game.md
index 18794d3b5af..5d6cbfde0a9 100644
--- a/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/challenge-project-create-a-mini-game.md
+++ b/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/challenge-project-create-a-mini-game.md
@@ -1,26 +1,26 @@
 ---
 id: 647e22338acb466c97ccbeed
-title: Challenge Project - Create a Mini-Game
+title: 挑戰項目 - 創建小遊戲
 challengeType: 19
 dashedName: challenge-project-create-a-mini-game
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+這個挑戰將有一部分在 Microsoft Learn 平臺上完成。 請按照如下說明來完成挑戰：
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/</a> and complete all the tasks for the "Challenge Project - Create a Mini-Game" module. This is **required** to earn the "Create Methods in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. 跳轉到 <a href="https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/</a>，然後完成“挑戰項目 - 創建小遊戲”模塊的所有任務。 這是在 Microsoft Learn 上獲得“在 C# 控制檯應用程序中創建方法”的獎盃以及參加認證考試所**必需**的。
+1. 完成後，返回並正確回答下面的問題。
 
-# --assignment--
+# --任務--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/" target="_blank" rel="noreferrer">Create a Mini-Game</a> challenge project on Microsoft Learn. Then, answer the question below.
+在 Microsoft Learn 上完成 <a href="https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/" target="_blank" rel="noreferrer">創建小遊戲</a> 的挑戰項目。 然後，回答下面的問題。
 
 # --question--
 
 ## --text--
 
-A developer wants to create a method that returns a value in an array. Which of the following options would be a good choice for a method signature?
+開發人員想要創建一個返回數組中元素值的方法。 下列哪項是一個方法簽名的不錯選擇？
 
 ## --answers--
 
diff --git a/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md b/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md
index 33d1914183f..a578ec1f566 100644
--- a/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md
+++ b/curriculum/challenges/chinese-traditional/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md
@@ -1,18 +1,18 @@
 ---
 id: 647e22958acb466c97ccbef4
-title: 'Guided Project - Debug and Handle Exceptions in a C# Console Application Using Visual Studio Code'
+title: '引導項目 - 使用 VS Code 在 C# 控制檯應用程序中調試和處理異常'
 challengeType: 19
 dashedName: guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+這個挑戰將有一部分在 Microsoft Learn 平臺上完成。 請按照如下說明來完成挑戰：
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/</a> and complete all the tasks for the "Guided Project - Debug and Handle Exceptions in a C# Console Application Using Visual Studio Code" module. This is **required** to earn the "Debug C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. 跳轉到 <a href="https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/</a>，然後完成“引導項目 - 使用 VS Code 在 C# 控制檯應用程序中調試和處理異常”模塊的所有任務。 這是在 Microsoft Learn 上獲得“調試 C# 控制檯應用程序”的獎盃以及參加認證考試所**必需**的。
+1. 完成後，返回並正確回答下面的問題。
 
-# --assignment--
+# --任務--
 
 Complete the <a href="https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/" target="_blank" rel="noreferrer">Debug and Handle Exceptions in a C# Console Application Using Visual Studio Code</a> guided project on Microsoft Learn. Then, answer the question below.
 
diff --git a/curriculum/challenges/chinese-traditional/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md b/curriculum/challenges/chinese-traditional/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
index fa5b427fdc5..857d52d4c51 100644
--- a/curriculum/challenges/chinese-traditional/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
+++ b/curriculum/challenges/chinese-traditional/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
@@ -1,5 +1,5 @@
 ---
-id: 657e0d0037192f3d9e3d5417 
+id: 657e0d0037192f3d9e3d5417
 title: Task 128
 challengeType: 22
 dashedName: task-128
diff --git a/curriculum/challenges/chinese-traditional/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md b/curriculum/challenges/chinese-traditional/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
index f8949309ce8..8b4e002d454 100644
--- a/curriculum/challenges/chinese-traditional/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
+++ b/curriculum/challenges/chinese-traditional/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
@@ -13,7 +13,7 @@ Bob: Alright, team. This is Alice's first day with _ , so please let _ introduce
 -->
 # --description--
 
-You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sould more natural. Listen for the object pronouns Bob uses in this audio.
+You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sound more natural. Listen for the object pronouns Bob uses in this audio.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/chinese-traditional/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md b/curriculum/challenges/chinese-traditional/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
index 6777804e37d..9131e7b1d3a 100644
--- a/curriculum/challenges/chinese-traditional/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
+++ b/curriculum/challenges/chinese-traditional/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
@@ -26,13 +26,13 @@ The algorithm uses this linear congruential generator from Microsoft C:
   <li>Seed the RNG with the number of the deal.
   </li><li>Create an array of 52 cards: Ace of Clubs, Ace of Diamonds, Ace of Hearts, Ace of Spades, 2 of Clubs, 2 of Diamonds, and so on through the ranks: Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King. 數組索引爲 0 到 51，梅花 A 爲 0，黑桃王爲 51。</li>
   <li>直到數組爲空：</li>
-  <li>在索引 ≡ 下一個隨機數（mod 數組長度）處選擇一張隨機卡片。</li>
     <ul>
+      <li>Choose a random card at <i>index</i> ≡ <i>next random number</i> (mod <i>array length</i>).</li>
       <li>Swap this random card with the last card of the array.</li>
-      <li>從陣列中移除這張隨機卡。 （數組長度減 1。）</li>
-      <li>處理這張隨機牌。</li>
+      <li>Remove this random card from the array. (Array length goes down by 1.)</li>
+      <li>Deal this random card.</li>
     </ul>
-  <li>處理所有 52 張牌，面朝上，跨越 8 列。 前 8 張牌分 8 列，接下來的 8 張牌排在前 8 張牌上，以此類推。</li>
+  <li>Deal all 52 cards, face up, across 8 columns. The first 8 cards go in 8 columns, the next 8 cards go on the first 8 cards, and so on.</li>
 </ol>
 
 **Example:**
diff --git a/curriculum/challenges/chinese-traditional/22-rosetta-code/rosetta-code-challenges/execute-brain.md b/curriculum/challenges/chinese-traditional/22-rosetta-code/rosetta-code-challenges/execute-brain.md
index 8e96d2171e6..62a7d597284 100644
--- a/curriculum/challenges/chinese-traditional/22-rosetta-code/rosetta-code-challenges/execute-brain.md
+++ b/curriculum/challenges/chinese-traditional/22-rosetta-code/rosetta-code-challenges/execute-brain.md
@@ -1,6 +1,6 @@
 ---
 id: 59e0a8df964e4540d5abe599
-title: 執行腦 ****
+title: Execute Brain****
 challengeType: 1
 forumTopicId: 302261
 dashedName: execute-brain
@@ -12,26 +12,26 @@ Write a function to implement a Brain\*\*\*\* interpreter. The function will tak
 
 RCBF is a set of <a href="https://rosettacode.org/wiki/Brainf***" target="_blank" rel="noopener noreferrer nofollow">Brainf\*\*\*</a> compilers and interpreters written for Rosetta Code in a variety of languages.
 
-以下是每個 RCBF 版本的鏈接。
+Below are links to each of the versions of RCBF.
 
-一個實現只需要正確地實現以下指令：
+An implementation need only properly implement the following instructions:
 
-| Command                   | 描述                                             |
-| ------------------------- | ---------------------------------------------- |
-| <code>></code> | Move the pointer to the right                  |
-| <code>&lt;</code> | 向左移動指針                                         |
-| <code>+</code> | 遞增指針下的存儲單元                                     |
-| <code>-</code> | 遞減指針下的存儲單元                                     |
-| <code>.</code> | 輸出指針所在存儲單元所代表的字符                               |
-| <code>,</code> | 輸入一個字符並將其存儲在指針所在的存儲單元中                         |
-| <code>\[</code> | 如果指針下的存儲單元爲 0，則跳過匹配的 <code>]</code>  |
-| <code>]</code> | 如果指針下的存儲單元非 0，則跳回匹配的 <code>\[</code> |
+| Command           | Description                                                                        |
+| ----------------- | ---------------------------------------------------------------------------------- |
+| <code>></code>    | Move the pointer to the right                                                      |
+| <code>&lt;</code> | Move the pointer to the left                                                       |
+| <code>+</code>    | Increment the memory cell under the pointer                                        |
+| <code>-</code>    | Decrement the memory cell under the pointer                                        |
+| <code>.</code>    | Output the character signified by the cell at the pointer                          |
+| <code>,</code>    | Input a character and store it in the cell at the pointer                          |
+| <code>\[</code>   | Jump past the matching <code>]</code> if the cell under the pointer is 0           |
+| <code>]</code>    | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
 
-允許任何單元格大小，EOF (*E*nd-*O*-*F*ile) 支持是可選的，就像你有有界或無界內存一樣。
+Any cell size is allowed, EOF (*E*nd-*O*-*F*ile) support is optional, as is whether you have bounded or unbounded memory.
 
 # --hints--
 
-`brain(bye)` 應該返回一個字符串
+`brain(bye)` should return a string
 
 ```js
 assert(typeof brain(bye) === 'string');
@@ -43,19 +43,19 @@ assert(typeof brain(bye) === 'string');
 assert.equal(brain('++++++[>++++++++++<-]>+++++.'), 'A');
 ```
 
-`brain(bye)` 應該返回 `Goodbye, World!\r\n`
+`brain(bye)` should return `Goodbye, World!\r\n`
 
 ```js
 assert.equal(brain(bye), 'Goodbye, World!\r\n');
 ```
 
-`brain(hello)` 應該返回 `Hello World!\n`
+`brain(hello)` should return `Hello World!\n`
 
 ```js
 assert.equal(brain(hello), 'Hello World!\n');
 ```
 
-`brain(fib)` 應該返回 `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89`
+`brain(fib)` should return `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89`
 
 ```js
 assert.equal(brain(fib), '1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89');
diff --git a/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md b/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
index c635d3c0e4e..c867ddc6364 100644
--- a/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
+++ b/curriculum/challenges/chinese/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
@@ -22,7 +22,8 @@ dashedName: record-collection
 -   你的函数必须始终返回整个 `records` 对象。
 -   如果 `value` 是空字符串，从专辑里删除指定的 `prop`。
 -   如果 `prop` 不是 `tracks`，并且 `value` 不是一个空字符串，将 `value` 赋给那个专辑的 `prop`。
--   如果 `prop` 是 `tracks` 并且 `value` 不是一个空字符串，你需要更新专辑的 `tracks` 数组。 首先，如果专辑没有 `tracks` 属性，赋予它一个空数组。 然后添加 `value` 作为专辑的 `tracks` 数组的最后一个项目。
+-   If `prop` is `tracks` and `value` isn't an empty string, but the album doesn't have a `tracks` property, create an empty array and add `value` to it.
+-   If prop is `tracks` and `value` isn't an empty string, add `value` to the end of the album's existing `tracks` array.
 
 **注意：** 将 `recordCollection` 对象的副本用于测试。 你不应该直接修改 `recordCollection` 对象。
 
diff --git a/curriculum/challenges/chinese/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md b/curriculum/challenges/chinese/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
index d197f932a45..700f90ab5e1 100644
--- a/curriculum/challenges/chinese/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
+++ b/curriculum/challenges/chinese/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
@@ -8,7 +8,7 @@ dashedName: serialization-of-a-user-object
 
 # --description--
 
-序列化和反序列化在身份认证中是很重要的概念。 序列化一个对象就是将其内容转换成一个体积很小的 *key*，后续可以通过它反序列化为原始对象。 这样，服务器就可以在用户未登录时识别用户，或者说给这个用户一个唯一标识，用户也不需要在每次访问不同页面时都给服务器发送用户名和密码。
+Serialization and deserialization are important concepts in regard to authentication. 序列化一个对象就是将其内容转换成一个体积很小的 *key*，后续可以通过它反序列化为原始对象。 这样，服务器就可以在用户未登录时识别用户，或者说给这个用户一个唯一标识，用户也不需要在每次访问不同页面时都给服务器发送用户名和密码。
 
 要正确设置此功能，你需要一个序列化的函数和一个反序列化函数。 在 Passport 中间件中，可以使用以下方法创建它们：
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
index c164cc5249a..49c7223d64d 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
@@ -19,8 +19,8 @@ You should use the `append()` method to append `start` to `paths[start]`.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\.append\s*\(\s*start\s*\)/m));
+    const {function_body} = shortest;
+    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\s*\.append\s*\(\s*start\s*\)/m));
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
index 4e6a10b2d9f..7bea8608b2e 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
@@ -27,8 +27,8 @@ You should call `extend()` on the neighbour node path passing the current node p
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
index 62c85955de3..6be42c7d3d6 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
@@ -16,8 +16,8 @@ You should append `node` to `paths[node]` just after your `else` statement.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\.append\s*\(\s*node\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\s*\.append\s*\(\s*node\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
index 64c27916929..fa0b34785b7 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
@@ -28,7 +28,7 @@ You should print the provided string inside your new `for` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
+    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(\s*f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
index 5f7b681ad57..3aa721d8085 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
@@ -32,7 +32,7 @@ You should create a variable called `targets_to_print` after your `while` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=/ms));
   }
 })
 ```
@@ -43,7 +43,7 @@ You should the ternary syntax to assign `[target]` when `target` is truthy, and
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
index 673e0d2427c..84a9d4ee3a4 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
@@ -25,7 +25,7 @@ Just before your `print()` call, use the `del` keyword to delete the `age` key a
 You should use the `del` keyword to delete `copper['age']` before the `print()` call.
 
 ```js
-({ test: () => assert.match(code, /^del\s+copper\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
+({ test: () => assert.match(code, /^del\s+copper\s*\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
index 6c85c357f6e..ffb16fb6204 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
@@ -24,7 +24,7 @@ Create an `__init__` method inside your `Board` class.
 Your method should be named `__init__`. Don't add any parameters.
 
 ```js
-assert.match(code, / +def\s+__init__\s*\(\)\:/);
+assert.match(code, / +def\s+__init__\s*\(\s*\)\:/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
index 47c0b94edd9..4f98b7996b9 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
@@ -43,7 +43,6 @@ class Board:
 --fcc-editable-region--
         for index, line in enumerate(self.board):
           row_list = []
-          
+
 --fcc-editable-region--
 ```
-
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
index 2e9268cc206..8bbdd7dcdfc 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
@@ -16,7 +16,7 @@ Use list slicing to create the three lists of equal length representing the `lin
 You should have `enumerate([line[:3], line[3:6], line[6:]], start=1)` within the inner `for` loop.
 
 ```js
-assert.match(code, /\[line\[:3\],\s*line\[3:6\],\s*line\[6:\]\]\s*,\s*start\s*=\s*1/);
+assert.match(code, /\[\s*line\s*\[\s*:3\s*\]\s*,\s*line\s*\[\s*3\s*:\s*6\s*\]\s*,\s*line\s*\[\s*6\s*:\s*\]\s*\]\s*,\s*start\s*=\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
index 9ebbe6f5892..0d8d01a1cf7 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
@@ -14,13 +14,13 @@ In the `try` block, attempt to find the index of the first occurrence of `0` in
 Use the index of the first occurrence of `0` in the current row using `contents.index(0)`.
 
 ```js
-assert.match(code, /contents\.index\(0\)/)
+assert.match(code, /contents\.index\(\s*0\s*\)/)
 ```
 
 You should have `col = contents.index(0)` within the `try` block.
 
 ```js
-assert.match(code, /col\s*=\s*contents\.index\(0\)/)
+assert.match(code, /col\s*=\s*contents\.index\(\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
index e6a7b168978..fcd2a490442 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
@@ -16,7 +16,7 @@ You should check if the number(`num`) is not present in `self.board[row]`.
 You should have `num not in self.board[row]` within `valid_in_row`.
 
 ```js
-assert.match(code, /num\s+not\s+in\s+self\.board\[row\]/)
+assert.match(code, /num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
index ee7f4ff6fdf..2e89511784f 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
@@ -21,7 +21,7 @@ You should have `return num not in self.board[row]` within `valid_in_row`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_row");
 const {function_body} = valid;
-assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\[row\]/);
+assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
index ccffe238a9f..8eece9f0a0c 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] != num` within `valid_in_col`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /self\.board\[row\]\[col\]\s*!=\s*num/);
+assert.match(function_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
index 07cbbbf181f..88ab5fcf3d9 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
@@ -28,7 +28,7 @@ You should have `all(self.board[row][col] != num for row in range(9))` within `v
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /all\s*\(\s*self\.board\[row\]\[col\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
+assert.match(function_body, /all\s*\(\s*self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
index 6f9f686808c..32d274544fe 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
@@ -21,7 +21,7 @@ You should assign the result of `(row // 3) * 3` to `row_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /row_start\s*=\s*\(row\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /row_start\s*=\s*\(\s*row\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
index acc3626317a..6c4d93c26dd 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
@@ -21,7 +21,7 @@ You should assign the result of `(col // 3) * 3` to `col_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /col_start\s*=\s*\(col\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /col_start\s*=\s*\(\s*col\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
index bee354de6bd..0680f4280c9 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
@@ -22,7 +22,7 @@ You should have `next_empty := self.find_empty_cell()` within the `solver` metho
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\)/);
+assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
index 1b9c13d6ed7..0ca0d152358 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
@@ -16,7 +16,7 @@ You should have `if (next_empty := self.find_empty_cell()) is None:` withing `so
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /if\s*\(next_empty\s*:=\s*self\.find_empty_cell\(\)\)\s*is\s*None:/)
+assert.match(function_body, /if\s*\(\s*next_empty\s*:=\s*self\.find_empty_cell\(\s*\)\s*\)\s*is\s*None:/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
index 1365de1cb76..7a5d1487f3e 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
@@ -7,7 +7,7 @@ dashedName: step-64
 
 # --description--
 
-If still there are empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive).
+If there are still empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive). Your loop should use the variable named `guess`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have `for guess in range(1,10):` within the `else` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "else");
-assert.match(block_body, /for\s+\w+\s+in\s+range\(1,\s*10\)/);
+assert.match(block_body, /for\s+\w+\s+in\s+range\(\s*1,\s*10\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
index 1b610a90e7f..f64f9c8a2c6 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] = guess` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*guess/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*guess/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
index 3cef51553c3..012fceef73b 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
@@ -17,7 +17,7 @@ You should have `self.solver()` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.solver\(\)/);
+assert.match(block_body, /self\.solver\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
index dd328024ae7..4aff52f6eb8 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
@@ -19,7 +19,7 @@ You should have `if self.solver():` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /if\s+self\.solver\(\):/);
+assert.match(block_body, /if\s+self\.solver\(\s*\):/);
 ```
 
 You should have `return True` within `if self.solver():`.
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
index dc7a4ded3f3..613bb6b4c29 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
@@ -19,7 +19,7 @@ You should have `self.board[row][col] = 0` outside the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*0/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*0/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
index 6849790deee..f9ed98ccf5e 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
@@ -18,7 +18,7 @@ You should have `gameboard = Board(board)` within the `solve_sudoku` function.
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solve_sudoku");
-assert.match(function_body, /gameboard\s*=\s*Board\(board\)/);
+assert.match(function_body, /gameboard\s*=\s*Board\(\s*board\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
index b019d3150e6..cdbbe0d6e5b 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
@@ -22,7 +22,7 @@ With this, you are finished with building the sudoku solver!
 Call the `solve_sudoku` method with `puzzle` as input.
 
 ```js
-assert.match(code, /solve_sudoku\(puzzle\)/);
+assert.match(code, /solve_sudoku\(\s*puzzle\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
index 53896c44502..9d38712f617 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
@@ -37,7 +37,7 @@ You should assign `array[:middle_point]` to the `left_part` variable.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /left_part\s*=\s*array\[:middle_point\]/);
+    assert.match(function_body, /left_part\s*=\s*array\s*\[\s*:\s*middle_point\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
index 8454509dc9e..7d2f149dc30 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
@@ -22,7 +22,7 @@ You should replace `pass` keyword with an `if` statement with this condition: `l
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*pass/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
index 8cef965d956..e8ee348a38f 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
@@ -24,7 +24,7 @@ You should replace `pass` with `array[sorted_index] = left_part[left_array_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*array\[sorted_index\]\s*=\s*left_part\[left_array_index\]\s*(?!.*\bpass\b)/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]\s*(?!.*\bpass\b)/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
index 338df398d05..ffffe33af85 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
@@ -24,7 +24,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /else:\s*[^}]*array\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /else:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
index 75969bb9e2f..c8008d67c06 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
@@ -24,7 +24,7 @@ Your `while` loop should have this condition: `left_array_index < len(left_part)
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(left_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):/m);
   }
 })
 ```
@@ -38,7 +38,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
index a8ffea645bc..50f14fa57d4 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = left_part[left_array_index]` in the body
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ You should not have `pass` in the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
index 4eff8a1b72b..3c8dd42bcb4 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `left_array_i
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
index 3e918fe3cdd..8230d334c7f 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
@@ -22,7 +22,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
index e337938d2c9..5a54f4c8a8b 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
@@ -22,7 +22,7 @@ Your `while` loop should have this condition: `right_array_index < len(right_par
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(right_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):/m);
   }
 })
 ```
@@ -36,7 +36,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
index 1099e760dbe..a14f519a0df 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
index 52a08729bd6..657097777ef 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
@@ -20,7 +20,7 @@ You should have `right_array_index += 1` within the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bright_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bright_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
index f3921c4327f..4fb2d86af42 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
index 8d6677590da..913529c54de 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
@@ -24,7 +24,7 @@ You should create an `if` statement to check if `len(array) <= 1`. Don't forget
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*pass/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
index fb9728eac42..fcb485440a9 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
@@ -20,7 +20,7 @@ You should replace `pass` with a `return` statement in the body of the `if` stat
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*return/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the body of the `if` statement
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
index 9c60d01f7d5..e78d477f26c 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
@@ -21,8 +21,8 @@ You should add `1` to the current value of `left_array_index`.
     const { function_body } = merge_sort;
 
     const allowedMatches = [
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
     ]
 
     const anyMatch = allowedMatches.some((match) => match.test(function_body));
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
index 77fff550a7a..34f6cfd5dc7 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
@@ -34,7 +34,7 @@ You should assign `array[middle_point:]` to the `right_part` variable
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /right_part\s*=\s*array\[middle_point:\]/);
+    assert.match(function_body, /right_part\s*=\s*array\s*\[\s*middle_point\s*:\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
index e321184ff32..bf4f31b7273 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
@@ -7,11 +7,11 @@ dashedName: step-2
 
 # --description--
 
-Replace the `pass` statement with a variable named `card_number` and a value of `4111-1111-4555-1142`.
+Replace the `pass` statement with a variable named `card_number` and a value of `'4111-1111-4555-1142'`.
 
 # --hints--
 
-You should have `card_number = "4111-1111-4555-1142"` within the `main` function.
+You should have `card_number = '4111-1111-4555-1142'` within the `main` function.
 
 ```js
 ({
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
index 2496c5b52d3..b1c6274d2a1 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
@@ -13,7 +13,7 @@ The Luhn algorithm is as follows:
 
 1. From the right to left, double the value of every second digit; if the product is greater than 9, sum the digits of the products.
 2. Take the sum of all the digits.
-3. If the sum of all the digits is a multiple of `10`, then the number is valid; else it is not valid.
+3. If the sum of all the digits is a multiple of 10, then the number is valid; else it is not valid.
 
 Assume an example of an account number "7992739871" that will have a check digit added, making it of the form 7992739871x:
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
index f72d2c209cd..5aa6961cead 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
@@ -30,7 +30,7 @@ You should have `card_number_reversed = card_number[0:4]` within the `verify_car
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
index fd6d0c7e43f..08c76d5b389 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
@@ -20,7 +20,7 @@ You should have `odd_digits = card_number_reversed[::2]` within the `verify_card
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\[::2\]/);
+        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\s*\[\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
index 253afa982da..ad57a6594fe 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
@@ -27,7 +27,7 @@ You should have `sum_of_odd_digits += int(digit)` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(digit\)/);
+        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(\s*digit\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
index 69467879bdf..b060eb1e0e0 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
@@ -20,7 +20,7 @@ You should have `even_digits = card_number_reversed[1::2]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\[1::2\]/);
+        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\s*\[\s*1\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
index 30879f96c1d..a10ea860726 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
@@ -22,7 +22,7 @@ You should have `number = int(digit) * 2` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /number\s*=\s*int\(digit\)\s*\*\s*2/);
+        assert.match(function_body, /number\s*=\s*int\(\s*digit\s*\)\s*\*\s*2/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
index 6c1bb5b6559..c13e176c4f1 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
@@ -30,8 +30,8 @@ You should have `number = number // 10 + number % 10` within the `if` statement.
         const verify_card_number = __helpers.python.getBlock("\n" + transformedCode, "if number >= 10");
         const { block_body } = verify_card_number;
         const allowedMatches = [
-            /number *= *\(?number *\/\/ *10\)? *\+ *\(?number *% *10/,
-            /number *= *\(?number *% *10\)? *\+ *\(?number *\/\/ *10/
+            /number *= *\(?\s*number *\/\/ *10\s*\)? *\+ *\(?\s*number *% *10/,
+            /number *= *\(?\s*number *% *10\s*\)? *\+ *\(?\s*number *\/\/ *10/
         ];
 
         const someMatch = allowedMatches.some(allowedMatch => allowedMatch.test(block_body));
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
index b1cf7f36090..4442ebdd9a5 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
@@ -7,7 +7,7 @@ dashedName: step-33
 
 # --description--
 
-Adjust the `verify_card_number` call such that if it returns `True`, print `VALID!` to the console. Otherwise, print `INVALID!`.
+Adjust the `verify_card_number` call such that if it returns `True`, print `'VALID!'` to the console. Otherwise, print `'INVALID!'`.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `if verify_card_number(translated_card_number):` within the `mai
 })
 ```
 
-You should have `print("VALID!")` within the `if` statement.
+You should have `print('VALID!')` within the `if` statement.
 
 ```js
 ({
@@ -40,7 +40,7 @@ You should have `print("VALID!")` within the `if` statement.
 })
 ```
 
-You should have `print("INVALID!")` within the `else` clause.
+You should have `print('INVALID!')` within the `else` clause.
 
 ```js
 ({
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
index e2ed6165357..6f161bd78bc 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
@@ -7,7 +7,7 @@ dashedName: step-34
 
 # --description--
 
-Change the value of `card_number` such that `INVALID!` is printed to the console.
+Change the value of `card_number` such that `'INVALID!'` is printed to the console.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
index 99a8dc21d3a..e02d8d4dcb3 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
@@ -20,7 +20,7 @@ You should have `card_number_reversed = card_number[0:4:2]` within the `verify_c
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4:2\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
index 95a972ef4c8..a0d03b31c48 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
@@ -27,7 +27,7 @@ You should have `card_number_reversed = card_number[::-1]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[::-1\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*:\s*:\s*-1\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
index e4c09d69aec..ea2bb554131 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
@@ -10,10 +10,10 @@ dashedName: step-4
 A dictionary is another built-in data type in Python. A dictionary is a collection of data in the form of *key*-*value* pairs. Dictionaries are defined with curly braces `{}` and they contain key-value pairs separated by commas. Each key is followed by a colon `:` and the value:
 
 ```py
-{"amount": 50.0, "category": "Food"}
+{'amount': 50.0, 'category': 'Food'}
 ```
 
-In the example above, `amount` and `category` are keys, and `50.0` and `Food` are their the corresponding values.
+In the example above, `amount` and `category` are keys, and `50.0` and `'Food'` are their the corresponding values.
 
 Create a dictionary with a key `amount` and value of the `amount` parameter and pass your new dictionary to the `.append()` call.
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
index 8b44d4e32da..42b753417c8 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `category` as the key, and the `category` parameter as the value.
+Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `'category'` as the key, and the `category` parameter as the value.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
index 699f2d2ae00..30932dc5d6c 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
@@ -10,11 +10,11 @@ dashedName: step-9
 You can access values in a dictionary through its keys. You need to use the bracket notation and include the key between the square brackets:
 
 ```py
-my_dict = {"amount": 50.0, "category": "Food"}
-my_dict["amount"] # 50.0
+my_dict = {'amount': 50.0, 'category': 'Food'}
+my_dict['amount'] # 50.0
 ```
 
-You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `amount` key and the `category` key in the `expense` dictionary.
+You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `'amount'` key and the `'category'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
index 5c9a6d9d564..3cedee2e187 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
@@ -13,7 +13,7 @@ Lambda functions are brief, anonymous functions in Python, ideal for simple, one
 lambda x: expr
 ```
 
-In the example above, `x` is a parameter to be use in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
+In the example above, `x` is a parameter to be used in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
index 7f4fc1d0639..50e8c839e6e 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `amount` key in the `expense` dictionary.
+Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `'amount'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
index aeb0671181e..c0f7009dbab 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `category` key of the `expense` dictionary and `category`.
+Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `'category'` key of the `expense` dictionary and `category`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
index 7231b909c9d..8ff874bcc95 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
@@ -23,7 +23,7 @@ You should define a function named `main()` without parameters.
 })
 ```
 
-You should move the `expense` list inside the `main()` function body.
+You should move the `expenses` list inside the `main()` function body.
 
 ```js
 ({ test: () => assert(__pyodide.runPython(`
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
index 6f7010e8a3d..b940cef2078 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
@@ -14,7 +14,7 @@ while condition:
     <code>
 ```
 
-Below the `expense` list, create a `while` loop. Use `True` for the condition, and print the string `\nExpense Tracker` inside the loop body to show the title of the program.
+Below the `expenses` list, create a `while` loop. Use `True` for the condition, and print the string `'\nExpense Tracker'` inside the loop body to show the title of the program.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
index ade80fe1ae1..68818220002 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
@@ -9,7 +9,7 @@ dashedName: step-25
 
 The `while` loop you created in the previous step is an infinite loop that will allow the program to continuously present menu options until the user decides to exit.
 
-After the `print()` call, add another one to print the string `1. Add an expense`.
+After the `print()` call, add another one to print the string `'1. Add an expense'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
index 6c27428af0f..20d2313e71d 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
@@ -7,7 +7,7 @@ dashedName: step-26
 
 # --description--
 
-Next, add another `print()` call and pass the string `2. List all expenses`.
+Next, add another `print()` call and pass the string `'2. List all expenses'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
index 664bfb3cd3e..f100b7f7da3 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
@@ -7,7 +7,7 @@ dashedName: step-27
 
 # --description--
 
-Provide the other menu options by printing the following three strings in your `while` loop: `3. Show total expenses`, `4. Filter expenses by category`, and `5. Exit`.
+Provide the other menu options by printing the following three strings in your `while` loop: `'3. Show total expenses'`, `'4. Filter expenses by category'`, and `'5. Exit'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
index 5e01173eba4..b217338b920 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
@@ -9,7 +9,7 @@ dashedName: step-28
 
 The `input()` function takes a user input and it returns the user input in the form of a string.
 
-Inside your `while` loop, call the `input()` function passing the string `Enter your choice:` as the argument, and assign the result to a variable named `choice`.
+Inside your `while` loop, call the `input()` function passing the string `'Enter your choice: '` as the argument, and assign the result to a variable named `choice`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
index 34627fd9e5c..6eec61d8754 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
@@ -7,9 +7,9 @@ dashedName: step-29
 
 # --description--
 
-You are going to use conditional statements to check the user's choice. If the choice is `1`, it means the user wants to add an expense.
+You are going to use conditional statements to check the user's choice. If the choice is `'1'`, it means the user wants to add an expense.
 
-Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `1`. If it's true, it will be the starting point for adding a new expense.
+Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `'1'`. If it's true, it will be the starting point for adding a new expense.
 
 Inside the `if` statement body, declare a variable `amount` and assign it an empty `input()` call.
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
index 77199ddfee9..7d0977e488b 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
@@ -9,7 +9,7 @@ dashedName: step-30
 
 Inside the `if` statement, you should ask the user to enter the amount for the expense and store it in a variable.
 
-Pass the string `Enter amount:` to your empty `input()` call, so you can store the expense.
+Pass the string `'Enter amount: '` to your empty `input()` call, so you can store the expense.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
index eeba015733d..60f7c1a995e 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
@@ -9,7 +9,7 @@ dashedName: step-34
 
 To list all expenses, you can use an `elif` statement after an `if` statement. The `elif` checks additional conditions and only works following an `if` statement.
 
-Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `\nAll Expenses:`.
+Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `'\nAll Expenses:'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
index 67baf667f2e..f068d18021c 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
@@ -9,7 +9,7 @@ dashedName: step-36
 
 To show the total expenses, create an `elif` statement that checks if `choice == '3'`.
 
-If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `\nTotal Expenses:` as the first argument and `total_expenses(expenses)` as the second argument.
+If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `'\nTotal Expenses: '` as the first argument and `total_expenses(expenses)` as the second argument.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
index 7a796154802..9a60b1f99ad 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
@@ -7,9 +7,9 @@ dashedName: step-41
 
 # --description--
 
-To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `5`.
+To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `'5'`.
 
-Inside the new `elif` statement, print the string `Exiting the program.` to show that the program is terminating its execution.
+Inside the new `elif` statement, print the string `'Exiting the program.'` to show that the program is terminating its execution.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `elif choice == '5':` in your code.
 })
 ```
 
-You should print `Exiting the program.` in your new `elif` statement.
+You should print `'Exiting the program.'` in your new `elif` statement.
 
 ```js
 ({ test: () =>
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
index 996fa6b1bd1..25b25dc5ff9 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
@@ -22,7 +22,7 @@ You should replace `pass` with an empty list named `snake_cased_char_list` withi
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\]/);
+        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\s*\]\s*/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
index e29fb51cd1d..ff6cf34fb8a 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
@@ -34,7 +34,7 @@ You should use the `.append()` method to add `char` to the `snake_cased_char_lis
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list.append\(char\)/);
+        assert.match(function_body, / +snake_cased_char_list.append\(\s*char\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
index c84a4a90ac5..81d6e0ad2e1 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
@@ -7,11 +7,11 @@ dashedName: step-12
 
 # --description--
 
-Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `aLongAndComplexString` as input to the function and print out the output using the `print()` function.
+Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `'aLongAndComplexString'` as input to the function and print out the output using the `print()` function.
 
 # --hints--
 
-You should call `convert_to_snake_case()` inside the `main()` function and pass `aLongAndComplexString` as input to the function.
+You should call `convert_to_snake_case()` inside the `main()` function and pass `'aLongAndComplexString'` as input to the function.
 
 ```js
 ({
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
index 9cbc5cab678..76b0927a4f6 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
@@ -7,7 +7,7 @@ dashedName: step-22
 
 # --description--
 
-Finally try out this new implementation by executing the program. Change the input string to `IAmAPascalCasedString` and see if it comes out as `i_am_a_pascal_cased_string`, even though that's a lie.
+Finally try out this new implementation by executing the program. Change the input string to `'IAmAPascalCasedString'` and see if it comes out as `'i_am_a_pascal_cased_string'`, even though that's a lie.
 
 If you've done everything correctly, you should see the input string converted into snake case, like before.
 
@@ -15,7 +15,7 @@ Congratulations! Now your `convert_to_snake_case()` function is ready.
 
 # --hints--
 
-You should change the input string from `aLongAndComplexString` to `IAmAPascalCasedString` inside the `main()` function.
+You should change the input string from `'aLongAndComplexString'` to `'IAmAPascalCasedString'` inside the `main()` function.
 
 ```js
 ({
@@ -24,7 +24,7 @@ You should change the input string from `aLongAndComplexString` to `IAmAPascalCa
         const main = __helpers.python.getDef("\n" + transformedCode, "main");
         const { function_body } = main;
 
-        assert.match(function_body, / +print\(convert_to_snake_case\('IAmAPascalCasedString'\)\)/);
+        assert.match(function_body, / +print\(\s*convert_to_snake_case\(\s*'IAmAPascalCasedString'\s*\)\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
index c777ede4384..4553033c503 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
@@ -7,9 +7,9 @@ dashedName: step-3
 
 # --description--
 
-The puzzle starts with the disks piled up on the first rod, in decreasing size. You need to populate your first list with numbers representing the various disk sizes.
+The puzzle starts with the disks piled up on the first rod, in decreasing size, with the smallest disk on top and the largest disk on the bottom. You need to populate your first list with numbers representing the various disk sizes.
 
-Instead of adding the items manually to the first list, generate a sequence of numbers from `3` to `1` by using the `range()` function and assign it to `rods['A']`.
+Instead of adding the items manually to the first list, generate a sequence of numbers counting down from `3` to `1` by using the `range()` function and assign it to `rods['A']`. Here, `3` represents the largest disk at the bottom of the pile and `1` represents the smallest disk at the top of the pile.
 
 The syntax is `range(x, y, h)`, where `x` is the starting integer (inclusive), `y` is the last integer (not inclusive), and `h` is the difference between a number and the next one in the sequence.
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
index 3f7b6a241a4..5696573b75d 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
@@ -14,13 +14,13 @@ Now check the data type of your `'A'` key by passing it to the `type()` function
 You should pass your `'A'` key to the `type()` function.
 
 ```js
-({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)/) })
+({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)/) })
 ```
 
 You should print the type of `rods['A']` using the `print()` function.
 
 ```js
-({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)\s*\)/) })
+({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
index 99a57a329a4..e88bdee9685 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
@@ -14,7 +14,7 @@ Now that the type is `list` as required, you can remove the `print()` call.
 You should remove `print(type(rods['A']))` from your code.
 
 ```js
-({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
+({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
index 785b5fe8918..8eafe878a0c 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
@@ -9,7 +9,7 @@ dashedName: step-16
 
 At the end of this project, you will create a recursive solution to the Tower of Hanoi puzzle, but now you are going to explore an iterative approach to this problem.
 
-Start by adding a `for` loop to your function that iterates through the number of moves and prints the current iteration number.
+Start by adding a `for` loop to your function that iterates through the `number_of_moves` and prints the current iteration number.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
index 617d559ce92..ec63fad55b7 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `A` and `B` (the source and the auxiliary rods).
+When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `'A'` and `'B'` (the source and the auxiliary rods).
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
index 3dc5186cdec..74366255ebb 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
@@ -7,7 +7,7 @@ dashedName: step-21
 
 # --description--
 
-Finally, when the move number divided by 3 has no remainder, the movement is allowed between `B` and `C`.
+Finally, when the move number divided by 3 has no remainder, the movement is allowed between `'B'` and `'C'`.
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
index 29db96234e4..b30a3c966d2 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
@@ -18,10 +18,10 @@ You should have an `elif` statement to check if `rods[source]` is not empty and
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:`);
 assert.match(code, re);
 ```
 
@@ -30,10 +30,10 @@ You should set `forward` to `True` inside your new `elif` statement. You should
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
 assert.match(code, re);
 ```
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
index 9b0b2b13521..1be9c3eeb62 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
@@ -20,7 +20,7 @@ You should add an `if` statement to execute when `forward` is `True` after the `
 You should print the provide string inside your new `if` statement.
 
 ```js
-({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
+({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
index 9282e84202b..9c10a97f214 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
@@ -14,13 +14,13 @@ After printing the move, you need to remove the last element from the source rod
 You should remove the last element from `rods[source]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[target].append(rods[source].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
index c78be38754d..17174fa9beb 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
@@ -14,25 +14,25 @@ When `forward` is `False`, the disk has to be moved in the opposite direction. W
 You should have an `else` clause to move the disks in the opposite direction.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
 ```
 
 You should have `print(f'Moving disk {rods[target][-1]} from {target} to {source}')` inside your `else` clause.
 
 ```js
-({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
+({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
 ```
 
 You should remove the last element from `rods[target]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[source].append(rods[target].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
index 28889cbb8d4..f8d40e21c64 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
@@ -14,13 +14,13 @@ Outside the `else` block, add a comment saying `display our progress` and print
 You should use the provided text to add a comment outside the `else` block.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
 ```
 
 You should print the `rods` object outside the `else` block, after the comment.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
index 34a7d97a681..2cd3c70bc26 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
@@ -15,7 +15,7 @@ You should move the code nested inside the first `if` statement (except the firs
 
 ```js
 ({ test: () => {
-  assert.match(code, /def\s+make_allowed_move\(rod1, rod2\):\s+forward\s+=\s+False\s+if\s+not\s+rods\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\[\s*source\s*\]\s+and\s+rods\[\s*source\s*\]\[-1\]\s<\srods\[\s*target\s*\]\[\s*-\s*1\s*\]:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\[\s*source\s*\].append\(\s*rods\[\s*target\s*\].pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+\print\(\s*rods\s*\)/);
+  assert.match(code, /def\s+make_allowed_move\(\s*rod1, rod2\s*\):\s+forward\s+=\s+False\s+if\s+not\s+rods\s*\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\s*\[\s*source\s*\]\s+and\s+rods\s*\[\s*source\s*\]\s*\[\s*-1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\s*\[\s*source\s*\]\s*\.append\(\s*rods\s*\[\s*target\s*\]\s*\.pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\(\s*rods\s*\)/);
   }
 })
 ```
@@ -47,7 +47,7 @@ def move(n, source, auxiliary, target):
             if not rods[target]:
                 forward = True
             elif rods[source] and rods[source][-1] < rods[target][-1]:
-                forward = True              
+                forward = True
             if forward:
                 print(f'Moving disk {rods[source][-1]} from {source} to {target}')
                 rods[target].append(rods[source].pop())
@@ -57,7 +57,7 @@ def move(n, source, auxiliary, target):
 
             # display our progress
             print(rods)
---fcc-editable-region--            
+--fcc-editable-region--
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
         elif remainder == 0:
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
index b9fc9b1f744..ec338dce557 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
@@ -15,11 +15,11 @@ You should change each occurrence of `source` inside the `make_allowed_move()` f
 
 ```js
 ({ test: () => {
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
index f20e0048530..2e7475a33dc 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
@@ -16,11 +16,11 @@ You should change each occurrence of `target` inside `make_allowed_move` into `r
 ```js
 ({ test: () => {
   assert.match(code, /if\s+not\s+rods\s*\[\s*rod2\s*\]\s*:/);
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\[\s*rod2\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*rod2\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\s*\[\s*rod2\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod2\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
index 8617f270e8a..c603b29f63b 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
@@ -11,7 +11,7 @@ It looks like it's working! But the output is not very readable. Print a new lin
 
 # --hints--
 
-You should pass a string with a new line character (`\n`) as the second argument for your two `print(rods)` calls.
+You should pass a string with a new line character (`'\n'`) as the second argument for your two `print(rods)` calls.
 
 ```js
 ({ test: () => assert.match(code, /print\(\s*rods\s*,\s*('|")\\n\1\s*\)(?=.*print\(\s*rods\s*,\s*('|")\\n\2\s*\))/s) })
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
index f7357d6373f..fe950dfdf49 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
@@ -16,7 +16,7 @@ For now, each recursive call prints the `rods` dictionary without performing any
 You should remove the last element from the `rods[source]` list and append it to the `rods[target]` list before the `print` call.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
index 9fca32bd01d..25059332cc7 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
@@ -14,7 +14,7 @@ Before appending the last element to the target, add a comment saying `move the
 You should add a comment with the provided text before `rods[target].append(rods[source].pop())`.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\))/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
index ba17b501b56..389e408de70 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Although recursion could sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
+Although recursion can sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
 
 Set `NUMBER_OF_DISKS` to `5` and check the output.
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
index 69829924059..6ffef36b935 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
@@ -21,7 +21,7 @@ You should delete the last three lines in your code.
 ({ test: () => {
   assert.isFalse(/pattern\s*=\s*r("|')\\W\1/.test(code));
   assert.isFalse(/quote\s*=\s*("|')_\1/.test(code));
-  assert.isFalse(/print\(re\.findall\(pattern, quote\)\)/.test(code));
+  assert.isFalse(/print\(\s*re\.findall\(\s*pattern, quote\s*\)\s*\)/.test(code));
 }})
 ```
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
index 8cf2d8c17f2..b55cf0e5fc2 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
@@ -14,7 +14,7 @@ Now, turn the empty string in the constraint tuple into a regex pattern to match
 You should have the `(nums, '[0123456789]')` tuple in your `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
+({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
index 3794f6521bc..2738417d79e 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
@@ -27,7 +27,7 @@ You should replace your existing `for` loop and two `if` statements with a singl
 Your new `if` condition should be a list comprehension that is the result of evaluating the expression `constraint <= len(re.findall(pattern, password))` for each `constraint`-`pattern` tuple in the `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /^(\s{8})if\s+\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
+({ test: () => assert.match(code, /^(\s{8})if\s*\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
index 5a7a8e606dd..3d3528bf4de 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
@@ -1,6 +1,6 @@
 ---
 id: 6551ecf597038c36637f3759
-title: Step 1
+title: 步骤 1
 challengeType: 20
 dashedName: step-1
 ---
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
index 2e6d119b78b..fb992bd1138 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
@@ -1,6 +1,6 @@
 ---
 id: 6551eebe6cbb2e6cadf9b468
-title: Step 2
+title: 步骤 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -15,7 +15,7 @@ string_2 = 'I am also a string'
 string_3 = 'This is not valid"
 ```
 
-Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `Hello World` to this variable.
+Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `'Hello World'` to this variable.
 
 # --hints--
 
@@ -32,7 +32,7 @@ You should declare a variable called `text`. Pay attention to place the variable
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello World` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
+You should assign the string `'Hello World'` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello World\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
index d40877ed6af..2b65b4b4212 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
@@ -14,7 +14,7 @@ greet = 'Hello!'
 print(greet)
 ```
 
-The code in the example above would print the string `Hello!`, which is the value of the variable `greet` passed to `print()` as the argument.
+The code in the example above would print the string `'Hello!'`, which is the value of the variable `greet` passed to `print()` as the argument.
 
 Print your `text` variable to the screen by passing the `text` variable as the argument to the `print()` function.
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
index 86104aff4f6..7c28d74b6b7 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `Hello World`, `H` is at index `0`, `e` is at index `1`, and so on. 
+Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `'Hello World'`, `'H'` is at index `0`, `'e'` is at index `1`, and so on.
 
 Each character of a string can be accessed by using bracket notation. You need to write the variable name followed by square brackets and add the index of the character between the brackets:
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
index 5d0ae1dd2fa..3103cb653bf 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-You can see `11` printed on the terminal because `Hello World` contains 11 characters.
+You can see `11` printed on the terminal because `'Hello World'` contains 11 characters.
 
 Another useful built-in function is `type()`, which returns the data type of a variable. Modify your `print()` call to print the data type of `text`.
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
index cedb112a823..074c15b2e19 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
@@ -14,7 +14,7 @@ Key aspects of variable naming in Python are:
 - Variable names are case sensitive, i.e. `my_var` is different from `my_Var` and `MY_VAR`.
 - Finally, it is a common convention to write variable names using `snake_case`, where each space is replaced by an underscore character and the words are written in lowercase letters.
 
-Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `abcdefghijklmnopqrstuvwxyz` to this variable.
+Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `'abcdefghijklmnopqrstuvwxyz'` to this variable.
 
 # --hints--
 
@@ -38,7 +38,7 @@ You should declare a variable called `alphabet`. Pay attention to place the vari
 assert.match(code, /^alphabet\s*=/m)
 ```
 
-You should assign the string `abcdefghijklmnopqrstuvwxyz` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
+You should assign the string `'abcdefghijklmnopqrstuvwxyz'` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
 
 ```js
 assert.match(code, /^alphabet\s*=\s*("|')abcdefghijklmnopqrstuvwxyz\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
index abe8ced263d..5c272b6d6f1 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
@@ -15,7 +15,7 @@ Start by finding the position of the first letter in the string. One way is to c
 text.find('W')
 ```
 
-Above, uppercase `W` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `W` character inside the string stored in the `text` variable.
+Above, uppercase `'W'` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `'W'` character inside the string stored in the `text` variable.
 
 At the end of your code, call `.find()` on your `alphabet` string and pass `text[0]` to the method. Note that a method is just a function that belongs to an object (you will learn more about that in another project).
 
@@ -36,7 +36,7 @@ assert.match(code, /alphabet\.find\s*\(.*\)/)
 You should call the `.find()` method on the `alphabet` variable and pass `text[0]` to the method. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)/m)
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 412619ccc4c..3e3af82109c 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -22,7 +22,7 @@ assert.match(code, /^index\s*=/m)
 You should assign the value returned by `alphabet.find(text[0])` to your `index` variable.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 34166fe3da4..83feddb9318 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `H`, is not found, since `alphabet` contains only lowercase letters.
+`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `'H'`, is not found, since `alphabet` contains only lowercase letters.
 
 You can transform a string into its lowercase equivalent with the `.lower()` method. Add another `print()` call to print `text.lower()` and see the output.
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index 54d47cf3f49..9a554ddeef1 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -27,7 +27,7 @@ assert.match(code, /^print\s*\(\s*index\s*\)/m);
 You should update your `alphabet.find(text[0])` call to use `text[0].lower()` as the argument. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index 95e2567fa84..e4c0036ebff 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-As you can see from the output, `h` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
+As you can see from the output, `'h'` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
 
 Modify your `shifted` variable so that it stores the value of `alphabet` at index `index + shift`.
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index 41811515713..a8da79ffd22 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -35,14 +35,14 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i/m)
 ```
 
-You should write the `in` keyword after `for i `. Make sure to leave a space around the `in` keyword.
+You should write the `in` keyword after `for i`. Make sure to leave a space around the `in` keyword.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i\s+in\s+/m)
 ```
 
-You should write `text` after `for i in `. Don't forget to add the final `:`.
+You should write `text` after `for i in`. Don't forget to add the final `:`.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index b7051de41c3..bdf47ed7c6f 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -7,7 +7,7 @@ dashedName: step-42
 
 # --description--
 
-Currently, spaces get encrypted as `c`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
+Currently, spaces get encrypted as `'c'`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
 
 ```py
 if x != 0:
@@ -16,7 +16,7 @@ if x != 0:
 
 In the example above, the condition of the `if` statement is `x != 0`. The code `print(x)`, inside the `if` statement body, runs only when the condition evaluates to `True` (in this example, meaning that `x` is different from zero).
 
-At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `space!`. Remember to indent this line.
+At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `'space!'`. Remember to indent this line.
 
 # --hints--
 
@@ -36,7 +36,7 @@ const {block_body} = __helpers.python.getBlock(commentless_code, /for\s+char\s+i
 assert(block_body.match(/if\s+char\s*==\s*("|')\s\1\s*:/));
 ```
 
-You should print the string `space!` inside your new `if` statement.
+You should print the string `'space!'` inside your new `if` statement.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index 69191130521..f3fc108e506 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, instead of printing `space!`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
+Now, instead of printing `'space!'`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index dfc91239b0e..f6ea23b4325 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Try to assign the string `Hello Zaira` to your `text` variable and see what happens in the console.
+Try to assign the string `'Hello Zaira'` to your `text` variable and see what happens in the console.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have a `text` variable.
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello Zaira` to your `text` variable.
+You should assign the string `'Hello Zaira'` to your `text` variable.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello\sZaira\1/m)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index 5629c8d00fb..b5f4088d3b7 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -7,7 +7,7 @@ dashedName: step-58
 
 # --description--
 
-Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `python` to this variable.
+Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `'python'` to this variable.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should declare a variable called `custom_key`.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should assign the string `python` to your `custom_key` variable.
+You should assign the string `'python'` to your `custom_key` variable.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "python") })
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 179f7313a5d..47211f5e8bc 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -7,8 +7,7 @@ dashedName: step-59
 
 # --description--
 
-Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text.
-At the beginning of your function body, declare a `key_index` variable and set it to zero.
+Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text. At the beginning of your function body, declare a `key_index` variable and set it to zero.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 660fb4ab263..7e452e05438 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
 
     for char in message.lower():
 --fcc-editable-region--
-        
+
         if char == ' ':
             encrypted_text += char
 --fcc-editable-region--            
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7727f6c57a8..7ca155b0c73 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -7,8 +7,7 @@ dashedName: step-62
 
 # --description--
 
-You will need to increase the `key_index` count for the next iteration.
-To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
+You will need to increase the `key_index` count for the next iteration. To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index 67567e88cdf..a6cd4a9a348 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
         if char == ' ':
             encrypted_text += char
         else:
-            
+
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index da202c1490a..7ca3ec197c0 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -50,7 +50,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key):
             # Find the right key character to encode
             key_char = key[key_index % len(key)]
             key_index += 1
-            
+
 --fcc-editable-region--            
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index 7ca7c2f323a..f783cbf3472 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -32,7 +32,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -41,7 +41,7 @@ def vigenere(message, key):
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
-            
+
             offset = alphabet.index(key_char)
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index a371865b1ef..28c793c06c3 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -55,7 +55,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index 60289b5525e..acf5b0f71c8 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -43,7 +43,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -57,7 +57,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index b1f7c3a5caa..87f8a5aa7f3 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -31,7 +31,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 534ff69ec91..84f3a8477e1 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -46,7 +46,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -60,9 +60,9 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index 3dfdd998a92..d29b009f3cf 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -47,9 +47,9 @@ def vigenere(message, key, direction):
             new_index = (index + offset) % len(alphabet)
 --fcc-editable-region--
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 #encryption = vigenere(text, custom_key)
 #print(encryption)
 ```
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 330871bc52a..9f1ea94390c 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,9 +45,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 --fcc-editable-region--
 #encryption = vigenere(text, custom_key)
 #print(encryption)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index db2c5bdfe33..adf869e6b5f 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index b4b329858a2..8e744b4c09f 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index f49b76f417f..cd7e9ce3a58 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -39,7 +39,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -53,7 +53,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index b295655e5c6..a6ecf2194d0 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -38,7 +38,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -52,9 +52,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index 521f1f961d3..d77bcd5d985 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -19,7 +19,7 @@ You should have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should be equal to the string `Hello Zaira!`.
+Your `text` variable should be equal to the string `'Hello Zaira!'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "Hello Zaira!") })
@@ -40,7 +40,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -54,9 +54,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index f9dfeed2c7d..a60afdc14cc 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -53,9 +53,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index fa8531f3421..40bfdb53982 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -48,9 +48,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index aba2d5665d2..822b22f2743 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -46,9 +46,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index a8a4a146373..82df5c7e409 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -70,7 +70,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index 900a42440bf..ceda0450cc8 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -51,7 +51,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index b37f689c14a..c0d946a1d38 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index d863b1b5667..e86470c6c34 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -51,15 +51,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index e7e001fd7b2..cb2c9d5e191 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -9,7 +9,7 @@ dashedName: step-86
 
 It works! Now, you are going to start with an encrypted message to be decrypted.
 
-Change the value of `text` to the string `mrttaqrhknsw ih puggrur`.
+Change the value of `text` to the string `'mrttaqrhknsw ih puggrur'`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should still have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should have the value of `mrttaqrhknsw ih puggrur`.
+Your `text` variable should have the value of `'mrttaqrhknsw ih puggrur'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "mrttaqrhknsw ih puggrur") })
@@ -54,15 +54,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = encrypt(text, custom_key)
 print(encryption)
 decryption = decrypt(encryption, custom_key)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index 7295239a2e5..a2e43552133 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -46,7 +46,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -60,9 +60,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 582c138e1b3..3cfffa05b63 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index 43650a129a7..b809b6cc227 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -9,11 +9,11 @@ dashedName: step-88
 
 Two or more strings can be concatenated by using the `+` operator. For example: `'Hello' + ' there!'` results in `'Hello there!`.
 
-Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `Encrypted text: `. Pay attention to the spacing.
+Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `'Encrypted text: '`. Pay attention to the spacing.
 
 # --hints--
 
-You should call `print()` and pass `'Encrypted text: ' + text` as the arguments. 
+You should call `print()` and pass `'Encrypted text: ' + text` as the arguments.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--    
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index 68b96128144..bb3bf128cf9 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -7,11 +7,11 @@ dashedName: step-89
 
 # --description--
 
-Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 # --hints--
 
-You should have a `print()` call that prints `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+You should have a `print()` call that prints `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -52,12 +52,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index e52496dd150..6d5c9a3c856 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -7,7 +7,7 @@ dashedName: step-90
 
 # --description--
 
-In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings. 
+In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings.
 
 Interpolation means writing placeholders that will be replaced by the specified values when the program runs. For example, you can get the same result of `'Encrypted text: ' + text` with `f'Encrypted text: {text}'`. You need to put an `f` before the quotes to create the f-string and write the variables or expressions you want to interpolate between curly braces.
 
@@ -49,12 +49,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index ebdb8b79456..4e28d4737fc 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index 8e107b0fff4..d55577ba1cf 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -47,12 +47,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 0f916bf649e..073dfdcd2bb 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -50,12 +50,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 23af806c5ce..006a04850ea 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -7,7 +7,7 @@ dashedName: step-95
 
 # --description--
 
-Wait a minute! You cannot decrypt anything with the wrong key. Try with `happycoding`.
+Wait a minute! You cannot decrypt anything with the wrong key. Try with `'happycoding'`.
 
 With that, your cipher project is complete.
 
@@ -19,7 +19,7 @@ You should still have a `custom_key` variable.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should modify the `custom_key` value into `happycoding`.
+You should modify the `custom_key` value into `'happycoding'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "happycoding") })
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
@@ -96,12 +96,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 05c44517e6f..9a4c27f1945 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -7,8 +7,7 @@ dashedName: step-41
 
 # --description--
 
-Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare.
-They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
+Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare. They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
 
 Python has the following comparison operators:
 
@@ -47,11 +46,11 @@ Python has the following comparison operators:
   </tbody>
 </table>
 
-At the beginning of your loop body, print the result of comparing `char` with an empty space (`' '`). Use the equality operator `==` for that.
+At the beginning of your loop body, print the result of comparing `char` with a space (`' '`). Use the equality operator `==` for that.
 
 # --hints--
 
-You should compare `char` with an empty space using the equality operator inside your `for` loop.
+You should compare `char` with a space using the equality operator inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -62,7 +61,7 @@ You should compare `char` with an empty space using the equality operator inside
 })
 ```
 
-You should print the result of comparing `char` with an empty space inside your `for` loop.
+You should print the result of comparing `char` with a space inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -73,7 +72,7 @@ You should print the result of comparing `char` with an empty space inside your
 })
 ```
 
-You should print the result of comparing `char` with an empty space at the beginning of your loop.
+You should print the result of comparing `char` with a space at the beginning of your loop.
 
 ```js
 ({ test: () => {
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 34e53a7cc4f..86a5a8baa9a 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -18,7 +18,7 @@ Give your `for` loop a body by adding a call to `print(i)`. Remember to indent t
 
 # --hints--
 
-You should add `print(i)` to your `for` loop body. Pay attention to the indentation. 
+You should add `print(i)` to your `for` loop body. Pay attention to the indentation.
 
 ```js
 assert.match(code, /^for\s+i\s+in\s+text:\s+print\s*\(\s*i\s*\)/m)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index e7886b5f796..042349ee0a4 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -15,7 +15,7 @@ Restore the indentation for your `print(i)` call.
 
 # --hints--
 
-You should indent `print(i)` inside your `for` loop body. 
+You should indent `print(i)` inside your `for` loop body.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index 6215b77a724..f971dfe2276 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -13,7 +13,7 @@ Rename your `i` variable to `char`.
 
 # --hints--
 
-You should replace `i` with `char`. 
+You should replace `i` with `char`.
 
 ```js
 assert.match(code, /^for\s+char\s+in\s+text:\s+print\s*\(\s*char\s*\)/m)
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index b2203350e08..97fee73da43 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -7,7 +7,7 @@ dashedName: step-31
 
 # --description--
 
-Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `train`, but this is not valid:
+Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `'train'`, but this is not valid:
 
 ```py
 my_string = 'brain'
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index 39784236282..e2b04ef618e 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -14,7 +14,7 @@ message = 'Hello World'
 message = 'Hello there!'
 ```
 
-Delete the `text[0]` line and reassign `text` the string `Albatross`.
+Delete the `text[0]` line and reassign `text` the string `'Albatross'`.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*\[\s*0\s*\]\s*\=\s*("|')\w\1/.test(commentless_code));
 ```
 
-You should reassign `text` the string `Albatross`. Do not modify `text = 'Hello World'`.
+You should reassign `text` the string `'Albatross'`. Do not modify `text = 'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 076a71f8786..6b04513e34d 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -20,7 +20,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*=\s*("|')Albatross\1/.test(commentless_code))
 ```
 
-You should still have a `text` variable with the value `Hello World`.
+You should still have a `text` variable with the value `'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index 442d9c6cb33..a98c25c7099 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index 71e999219ba..d239d653b25 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
index 0c7d5579a33..dbafaeb2174 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
@@ -16,13 +16,13 @@ Delete `pass` and recursively call the `_insert` method on the left child of the
 You should call the `self._insert` method passing `node.left` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the `left` attribute of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
index e83dc278aaf..0191977d8fe 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
@@ -14,13 +14,13 @@ Inside your `elif` clause, replace `pass` with a call to the `_insert` method on
 You should call the `self._insert()` method passing `node.right` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the right attribute (`node.right`) of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
index 4d88ff39286..3e53c9b7c7a 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
@@ -25,7 +25,7 @@ You should call the `_search` method within the `search` method.
 You should call the `_search` method passing `self.root` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
index fb267a404e7..73eff654f75 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
@@ -14,7 +14,7 @@ Now, make the `search` method return the result of the `_search()` call.
 You should prepend the `return` statement to your `_search()` call.
 
 ```js
-({ test: () => assert.match(code, /return\s+self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /return\s+self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
index 88488184651..1f5227eff60 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
@@ -22,8 +22,8 @@ assert.match(after_split, /if\s+key\s+<\s+node\.key/);
 
 You should return `self._search(node.left, key)` from your new `if` block.
 
-```js    
-({ test: () => assert.match(code, /return\s+self\._search\(node\.left,\s*key\)/) });    
+```js
+({ test: () => assert.match(code, /return\s+self\._search\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
index 8f55ac7d8fe..6caeb213865 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
@@ -25,14 +25,14 @@ assert.match(after_split, /self\._search/);
 You should pass two arguments to the call of the `_search` method: `node.right` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should return the result of the `_search` method call.
 
 ```js
 ({
-  test: () => assert.match(code, /return\s+self\._search\(node\.right,\s*key\)/)
+  test: () => assert.match(code, /return\s+self\._search\(\s*node\.right,\s*key\s*\)/)
 });
 ```
 
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
index f8435b24d77..a4f8008f61a 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
@@ -18,7 +18,7 @@ Within the `BinarySearchTree` class, define a `delete` method. It takes two para
 You should define a `delete` method with two parameters: `self` and `key`. Remember to use `pass`.
 
 ```js
-({ test: () => assert.match(code, /def\s+delete\(self,\s*key\)/) });
+({ test: () => assert.match(code, /def\s+delete\(\s*self,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
index 287700b4dbd..fc5b22279aa 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
@@ -14,7 +14,7 @@ Inside the `delete` method, delete `pass` and call the private helper method `_d
 Your `delete` method should call the `_delete` method with two arguments: `self.root` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
index 20ee3d48f5f..07091bb1960 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
@@ -16,7 +16,7 @@ To handle this case, assign the result of the `_delete` call to `self.root`.
 You should assign the result of the `_delete()` call to `self.root`.
 
 ```js
-({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
index 32ea1aac2ca..6a505bde768 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
@@ -14,7 +14,7 @@ Inside the `BinarySearchTree` class, define a new helper method called `_delete`
 You should define the `_delete` method inside the `BinarySearchTree` class with the parameters `self`, `node` and `key`. Remember to use the `pass` keyword.
 
 ```js
-assert.match(code, /def\s+_delete\(self,\s*node,\s*key\)/);
+assert.match(code, /def\s+_delete\(\s*self,\s*node,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
index 4a4c50d39e7..4a09247b1d3 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
@@ -14,13 +14,13 @@ Within the `if` block, replace `pass` with a call to the `_delete` method, passi
 You should call the `_delete` method with `node.left` and the `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to the left child (`node.left`) of the current node.
 
 ```js
-assert.match(code, /node\.left\s*=\s*self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /node\.left\s*=\s*self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
index 24dd6906c7a..0cc9b1f4c67 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
@@ -23,13 +23,13 @@ assert.match(after_split, /elif\s+key\s+>\s+node\.key/);
 You should call the `_delete` method with `node.right` and `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to `node.right`.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
index 379de8ca254..57b5fd49319 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
@@ -20,7 +20,7 @@ For now, add a `_min_value` call after your `elif` block, passing `node.right` a
 You should assign `self._min_value(node.right)` to `node.key` after your `elif` block.
 
 ```js
-assert.match(code, /node\.key\s*=\s*self\._min_value\(node\.right\)/);
+assert.match(code, /node\.key\s*=\s*self\._min_value\(\s*node\.right\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
index 24af584b159..82ba7f6baf2 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
@@ -22,7 +22,7 @@ assert.match(code, /self\._delete\(\s*node\.right\s*,\s*node\.key\s*/);
 You should assign the return value of the `_delete()` call to the right child of the current node.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right\,\s*node\.key/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right\,\s*node\.key/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
index f83b91a5840..89afd629c8b 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
@@ -16,7 +16,7 @@ This will start the traversal from the root of the binary search tree (`self.roo
 You should call `_inorder_traversal` and pass `self.root` and `result` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._inorder_traversal\(self\.root,\s*result\)/) })
+({ test: () => assert.match(code, /self\._inorder_traversal\(\s*self\.root,\s*result\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
index 2080cd24f56..668a829284d 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
@@ -14,7 +14,7 @@ Define the `_inorder_traversal` method and give it three parameters: `self`, `no
 You should define a method `_inorder_traversal` that takes three parameters: `self`, `node`, and `result`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+_inorder_traversal\(self,\s*node,\s*result\)/);
+assert.match(code, /def\s+_inorder_traversal\(\s*self,\s*node,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
index 7a18dae662a..f2de43404e8 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
@@ -20,7 +20,7 @@ assert.match(code, /if\s+node:/);
 You should call `_inorder_traversal` on the `node.left` inside the `if` block.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.left\s*,\s*result\s*\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.left\s*,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
index 9f50bef2e59..08275f94888 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
@@ -14,7 +14,7 @@ Still inside the `if` block, append the `key` of the current node to the `result
 You should append `node.key` to the `result` list.
 
 ```js
-assert.match(code, /result\.append\(node\.key\)/);
+assert.match(code, /result\.append\(\s*node\.key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
index 639c3db5c87..db3887a0265 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
@@ -16,13 +16,13 @@ Create an instance of the `BinarySearchTree` class and assign it to the variable
 You should create an instance of the `BinarySearchTree` class.
 
 ```js
-assert.match(code, /BinarySearchTree\(\)/);
+assert.match(code, /BinarySearchTree\(\s*\)/);
 ```
 
 You should assign the new instance of `BinarySearchTree` to the variable `bst`.
 
 ```js
-assert.match(code, /bst\s*=\s*BinarySearchTree\(\)/);
+assert.match(code, /bst\s*=\s*BinarySearchTree\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
index 04eb9dcf5f1..99c55769abe 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
@@ -20,7 +20,7 @@ assert.match(code, /nodes/);
 Your `node` variable should have the value `[50, 30, 20, 40, 70, 60, 80]`.
 
 ```js
-assert.match(code, /nodes\s*=\s*\[50,\s*30,\s*20,\s*40,\s*70,\s*60,\s*80\]/);
+assert.match(code, /nodes\s*=\s*\[\s*50\s*,\s*30\s*,\s*20\s*,\s*40\s*\s*,\s*70\s*,\s*60\s*,\s*80\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
index 605a1c5d26f..9830b0a4c35 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
@@ -16,7 +16,7 @@ This recursive call explores the entire right subtree in an in-order manner.
 You should call `_inorder_traversal` passing `node.right` and `result` as the arguments.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.right,\s*result\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.right,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
index 564ce268c3a..e9d06bbde4b 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
@@ -16,7 +16,7 @@ To change that to print a useful value, define another method named `__str__` in
 You should define a method `__str__` that takes a single argument `self`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+__str__\(self\)/);
+assert.match(code, /def\s+__str__\(\s*self\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
index 31070fcc246..9faa1cf9286 100644
--- a/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
+++ b/curriculum/challenges/chinese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
@@ -14,7 +14,7 @@ In the body of the `__str__` method, delete `pass` and return the result of call
 You should return the string value of `self.key` from your `__str__` method.
 
 ```js
-({ test: () => assert.match(code, /^\s{8}return\s+str\(self\.key\)/m) })
+({ test: () => assert.match(code, /^\s{8}return\s+str\(\s*self\.key\s*\)/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md b/curriculum/challenges/chinese/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
index dcea9db4ca2..8d65ecaf637 100644
--- a/curriculum/challenges/chinese/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
+++ b/curriculum/challenges/chinese/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
@@ -13,16 +13,12 @@ Lastly change the text color of the `terms and conditions` link element to `#dfd
 
 # --hints--
 
-你应该使用 `a` 元素选择器。
-
-```js
-assert.exists(new __helpers.CSSHelp(document).getStyle('a'));
-```
 
 你应该为 `a` 元素添加值为 `#dfdfe2` 的 `color`。
 
 ```js
-assert.equal(new __helpers.CSSHelp(document).getStyle('a')?.color, 'rgb(223, 223, 226)');
+const linkElement = document.querySelector("a");
+assert.equal(window.getComputedStyle(linkElement)?.color, 'rgb(223, 223, 226)');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
index f064bdf47fe..5d276f9f000 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
@@ -10,11 +10,9 @@ dashedName: build-a-cash-register
 
 Here you'll build a cash register app that will return change to the customer based on the price of the item, the amount of cash provided by the customer, and the amount of cash in the cash drawer. You'll also need to show different messages to the user in different scenarios, such as when the customer provides too little cash or when the cash drawer doesn't have enough to issue the correct change.
 
-There are a few variables you'll need to use in your code:
+In the `script.js` file, you have been provided with the `price` and `cid` variables. The `price` variable is the price of the item, and the `cid` variable is the cash-in-drawer, which is a 2D array listing the available currency in the cash drawer.
 
-- `price`：商品的价格，以浮点数表示。
-- `cash`：顾客为商品提供的现金金额，通过页面上的`input`元素来提供。
-- `cid`：现金抽屉，一个列出现金抽屉中可用货币的二维数组。
+The other variable you will need add is the `cash` variable, which is the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
 
 If you'd like to test your application with different values for `price` and `cid`, make sure to declare them with the `let` keyword so they can be reassigned by our tests.
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
index 8427c7b3e6b..d609ef6abc3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
@@ -28,10 +28,10 @@ In this project, you'll build an app that will search for Pokémon by name or ID
 1. You should have an element with an `id` of `special-defense`
 1. You should have an element with an `id` of `speed`
 1. When the `#search-input` element contains the value `Red` and the `#search-button` element is clicked, an alert should appear with the text `Pokémon not found`
-1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
+1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the `#types` element should contain a single inner element with the value `ELECTRIC`. The `#types` element content should be cleared between searches
-1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
+1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed`elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the `#types` element should contain two inner elements with the text values `GHOST` and `POISON`, respectively. The `#types` element content should be cleared between searches
 
@@ -158,7 +158,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
+When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
 
 ```js
 async () => {
@@ -251,7 +251,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
+When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
 
 ```js
 async () => {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
index 83c39dfe47f..be9974d7f7e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
@@ -11,7 +11,7 @@ Now that you have the value of the input, you need to split it into an array of
 
 The `.split()` method takes a string and splits it into an array of strings. You can pass it a string of characters or a RegEx to use as a separator. For example, `string.split(",")` would split the string at each comma and return an array of strings.
 
-Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces seperating your values. Store the array in an `array` variable.
+Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces separating your values. Store the array in an `array` variable.
 
 # --hints--
 
@@ -36,7 +36,7 @@ assert.match(code.toString(),  /array\s*=\s*value\.split()/);
 You should use `/,\s*/g` for the `split()` method's separator.
 
 ```js
-assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\)/);
+assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
index 79efd11e2f6..797f67b6d1c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
@@ -22,7 +22,7 @@ assert.match(calculate.toString(), /numbers/);
 You should use the `.map()` method on your `array` variable.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\)/);
+assert.match(calculate.toString(), /array\.map\(\s*\)/);
 ```
 
 You should assign the result of your `.map()` call to your `numbers` variable.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
index c6e423add21..fa7a472ae10 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
@@ -24,7 +24,7 @@ Add a callback function to your `.map()` method that converts each element to a
 Your `.map()` method should have a callback function which takes an `el` parameter.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use the `Number` constructor to convert `el` to a number.
@@ -42,7 +42,7 @@ assert.notMatch(calculate.toString(), /new/);
 Your callback function should return the element converted to a number.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
index 8fd20b8f2c5..31d5cc49413 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
@@ -24,13 +24,13 @@ assert.match(calculate.toString(), /filtered/);
 Your `calculate` function should use the `.filter()` method on the `numbers` array.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\)/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*\)/)
 ```
 
 You should assign the result of `numbers.filter()` to the `filtered` variable.
 
 ```js
-assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\)/);
+assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
index bc2f0dd7342..9bbea45f521 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
@@ -26,7 +26,7 @@ Add a callback function to your `.filter()` method that returns `true` if the el
 Your `.filter()` method should have a callback which accepts `el` as a parameter.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use `!` and `isNaN()` to check if `el` is NOT `NaN`.
@@ -38,7 +38,7 @@ assert.match(calculate.toString(), /!\s*(Number\.)?isNaN\(\s*el\s*\)/);
 Your callback function should return elements that are not `NaN`.
 
 ```js
-assert.match(calculate.toString(), /(numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
index 811d2ee0079..738b547c0a1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
@@ -28,20 +28,19 @@ assert.notMatch(calculate.toString(), /filtered/);
 You should chain your `.filter()` call to your `.map()` call.
 
 ```js
-console.log(calculate.toString());
 assert.match(calculate.toString(), /array\.map\(.*\)\.filter\(/s);
 ```
 
 You should not remove the `.map()` callback.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 You should not remove the `.filter()` callback.
 
 ```js
-assert.match(calculate.toString(), /(\.filter\(\(?\s*el\s*\)?\s*=>|\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
+assert.match(calculate.toString(), /(\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
index 7c0a447b6cc..2cc8f0fad7d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
@@ -22,13 +22,13 @@ assert.match(getMean.toString(), /sum/);
 Your `getMean` function should use the `.reduce()` method of the `array` parameter.
 
 ```js
-assert.match(getMean.toString(), /array\.reduce\(\)/);
+assert.match(getMean.toString(), /array\.reduce\(\s*\)/);
 ```
 
 You should assign the result of `array.reduce()` to the `sum` variable.
 
 ```js
-assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\)/);
+assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
index 0b22c85ca6a..a2575abeba3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
@@ -22,13 +22,13 @@ For your `sum` variable, pass a callback to `.reduce()` that takes the accumulat
 Your `reduce` method should have a callback function which takes an `acc` and an `el` parameters.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)/)
 ```
 
 Your `reduce` method should return the sum of `acc` and `el`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
index 420b532aa92..07858e7dec0 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
@@ -22,7 +22,7 @@ Set the initial value of the accumulator to `0`.
 Your `reduce` method should have `0` as the initial value.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
index d15924ec709..83b3eee67c2 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
@@ -28,19 +28,19 @@ assert.notMatch(getMean.toString(), /mean\s*=/);
 You should not change the logic within the `reduce` method.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 You should divide the result of the `reduce` method by the length of the array.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)\s*\/\s*array\.length/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 You should use implicit return syntax to directly return the result of `reduce` divided by the array length.
 
 ```js
-assert.match(code, /const\s+getMean\s*=\s*\(?array\)?\s*=>\s*array\.reduce\(\(acc\s*,\s*el\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
+assert.match(code, /const\s+getMean\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
index b343b95d87f..d285852f92a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
@@ -18,13 +18,13 @@ To sort your numbers from smallest to largest, pass a callback function that tak
 Your `sort` method should have a callback function which takes an `a` and a `b` parameters.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)/)
 ```
 
 Your `sort` method should return the result of subtracting `b` from `a`.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
index 695579834a9..97bb9ef0e04 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
@@ -34,13 +34,13 @@ assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0
 If `array.length` is even, pass an array with the two middle numbers from the `sorted` array to the `getMean` function. The first item in the array argument should be the value at index `array.length / 2` from `sorted` and the second should use the value at the index `array.length / 2 - 1` from `sorted`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:/);
 ```
 
 If the `array.length` is odd, your `median` variable should assign the middle number to the `median` variable. The middle number is the value of `sorted` at `Math.floor(array.length / 2)`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:\s*sorted\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\)\];/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:\s*sorted\s*\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\s*\)\s*\]\s*;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
index 0f80bd629be..e38537ed779 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
@@ -22,13 +22,13 @@ assert.match(calculate.toString(), /median\s*=/);
 Your `median` variable should be assigned the value of `getMedian(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /median\s*=\s*getMedian\(numbers\)/);
+assert.match(calculate.toString(), /median\s*=\s*getMedian\(\s*numbers\s*\)/);
 ```
 
 Your `calculate` function should query the DOM for the `#median` element and set the `textContent` to `median`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#median\1\)\.textContent\s*=\s*median/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#median\1\s*\)\.textContent\s*=\s*median/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
index 17de177df31..cca770ac426 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
@@ -22,14 +22,13 @@ assert.match(getMode.toString(), /array\.forEach\(/);
 Your `.forEach()` method should have a callback function which takes an `el` parameter.
 
 ```js
-console.log(getMode.toString());
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)/);
 ```
 
 Your `.forEach()` method should increment the count for each number. Don't forget the fallback value.
 
 ```js
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)\s*\{?\s*(return)?\s*counts\[\s*el\s*\]\s*=\s*\(\s*counts\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)\s*\{?\s*(return)?\s*counts\s*\[\s*el\s*\]\s*=\s*\(\s*counts\s*\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
index cf3989dfb23..38eab8ab27a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
@@ -24,19 +24,19 @@ assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.so
 Your `getMode` function should pass a callback to the `sort` method with parameters `a` and `b`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)/)
 ```
 
 Your `getMode` function should use the `sort` method to sort the `Object.keys()` array and return the value of `counts[b]` minus the value of `counts[a]`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)/)
 ```
 
 Your `highest` variable should have the value of the first entry in the sorted `Object.keys(counts)` array.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)\[0\];/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)\s*\[\s*0\s*\]\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
index 985b3c31f5b..89f9c9c5683 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
@@ -20,13 +20,13 @@ assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filte
 Your `.filter()` method should take a callback function with a parameter `el`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)/);
 ```
 
 Your `.filter()` method should return whether the value of `counts[el]` is equal to `counts[highest]`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\[\s*el\s*\]\s*===\s*counts\[\s*highest\s*\];\s*\}/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\s*\[\s*el\s*\]\s*===\s*counts\s*\[\s*highest\s*\]\s*;\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
index 9ef808c7073..a4b0e3eee91 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /mode\s*=\s*getMode\(\s*numbers\s*\);/);
 Your `calculate` function should query the DOM for the `#mode` element and set the `textContent` to `mode`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#mode\1\)\.textContent\s*=\s*mode;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#mode\1\s*\)\.textContent\s*=\s*mode;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
index c88ce39ce83..e395102a36f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
@@ -12,7 +12,10 @@ Your next calculation is the <dfn>range</dfn>, which is the difference between t
 You previously learned about the global `Math` object. `Math` has a `.min()` method to get the smallest number from a series of numbers, and the `.max()` method to get the largest number. Here's an example that gets the smallest number from an array:
 
 ```js
-Math.min(1, 9, 11, -3, 0.5);
+const numbersArr = [2, 3, 1];
+
+console.log(Math.min(...numbersArr));
+// Expected output: 1
 ```
 
 Declare a `getRange` function that takes the same `array` parameter you have been using. Using `Math.min()`, `Math.max()`, and the spread operator, return the difference between the largest and smallest numbers in the list.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
index d562fff11bf..1bd4f6e9c83 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
@@ -14,13 +14,13 @@ Add the logic for calculating and displaying the range to your `calculate` funct
 Your `calculate` function should set a `range` variable to the result of `getRange(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /range\s*=\s*getRange\(numbers\);/);
+assert.match(calculate.toString(), /range\s*=\s*getRange\(\s*numbers\s*\);/);
 ```
 
 Your `calculate` function should set the `#range` element's `textContent` to the `range` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#range\1\)\.textContent\s*=\s*range;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#range\1\s*\)\.textContent\s*=\s*range;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
index 44250c299fc..9687bba9a9e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
@@ -26,13 +26,13 @@ assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(/);
 Your `differences` variable should use the `el` parameter in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Your `map` callback should return the value of `el` minus `mean`.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
index 129ec361cc7..fdc879e82b6 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
@@ -28,13 +28,13 @@ assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\
 Your `squaredDifferences` variable should use the `el` parameter in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Your `map` callback should return the value of `el` squared.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
 ```
 
 Your `map` callback should use the `**` operator.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
index a2b550ebf67..2d66881b2c4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
@@ -28,14 +28,13 @@ assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDiffere
 Your `sumSquaredDifferences` variable should use the `acc` and `el` parameters in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Your `reduce` callback should return the sum of `acc` and `el`.
 
 ```js
-console.log(getVariance.toString());
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
index a9de0de327d..07069778076 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
@@ -46,19 +46,19 @@ assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(/);
 Your `variance` variable should use the `acc` and `el` parameters in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Your `reduce` callback should be an empty function.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}/);
 ```
 
 Your `reduce` callback should have an initial value of `0`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}\s*,\s*0\s*\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
index a144d66e015..f77567d2294 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
@@ -14,37 +14,37 @@ Within your empty `.reduce()` callback, declare a variable `difference` and set
 Your `reduce` callback should have a `difference` variable.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=/);
 ```
 
 Your `difference` variable should be set to the value of `el` minus `mean`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
 ```
 
 Your `reduce` callback should have a `squared` variable.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
 ```
 
 Your `squared` variable should be set to the value of `difference` to the power of 2.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
 ```
 
 Your `reduce` callback should return the value of `acc` plus `squared`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
 ```
 
 You should not remove the initial value of `0` from your `.reduce()` method.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
index 117861dc74e..9e366ddf03b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
@@ -16,7 +16,7 @@ Divide your `.reduce()` call by the length of the array (in your `variance` decl
 You should divide the result of the `.reduce()` call by the length of the array.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)\s*\/\s*array\.length;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)\s*\/\s*array\.length;/);
 ```
 
 You should return the value of `variance`.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
index 2d2caf9b81e..7a9b4437bd8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /variance\s*=\s*getVariance\(\s*numbers\s*\)/
 You should set the `textContent` of the `#variance` element to the value of the `variance` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#variance\1\)\.textContent\s*=\s*variance/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#variance\1\s*\)\.textContent\s*=\s*variance/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
index 015e50b74a6..fac72b8c424 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
@@ -14,13 +14,13 @@ Now update the `calculate` function to include the standard deviation logic, lik
 Your `calculate` function should have a `standardDeviation` variable set to the result of `getStandardDeviation(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(numbers\)/);
+assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(\s*numbers\s*\)/);
 ```
 
 You should update the `textContent` of the `#standardDeviation` element to be the `standardDeviation` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#standardDeviation\1\)\.textContent\s*=\s*standardDeviation/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#standardDeviation\1\s*\)\.textContent\s*=\s*standardDeviation/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
index 26c6c0e11c6..e653c4c6a9b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
@@ -16,19 +16,19 @@ To fix this, add an empty `.slice()` call before your `.sort()` method. The empt
 You should call `.slice()` on the `array` parameter.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)/);
 ```
 
 Your `.sort()` call should be chained to the `.slice()` call.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(/);
 ```
 
 You should not modify the `.sort()` method callback.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
index 7b67433a7c9..4662e9757d8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
@@ -24,7 +24,7 @@ Use the `async` keyword to create an asynchronous arrow function called `fetchDa
 You should use the `async` keyword to create an asynchronous arrow function called `fetchData`.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*[^}]*\s*}/);
 ```
 
 `fetchData` should be defined.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
index 2720102c72b..9506cb93718 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
@@ -37,7 +37,7 @@ assert.match(code, /\s*const\s+res\s*=\s*await\s+fetch\(\s*(.*)\s*\)/);
 You should pass in the `forumLatest` constant to the `fetch` call.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
index 8021c051128..e27a246cdc6 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+data/);
 You should assign `await res.json()` to the `data` variable.
 
 ```js
-assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\);?\s*/);
+assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
index f6735119a56..8f51834d9d7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
@@ -28,7 +28,7 @@ assert.match(code, /\s*try\s*{[\s\S]*\s*console\.log\(\s*data\s*\)[\s\S]*}\s*cat
 You should call the `fetchData()` function, after the `fetchData()` function is defined.
 
 ```js
-assert.match(code, /};?\s*fetchData\(\)/);
+assert.match(code, /};?\s*fetchData\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
index 5d40065c67e..a649f2ebd61 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
@@ -22,7 +22,7 @@ assert.match(code, /\s*showLatestPosts\(.*\);??\s*/);
 You should pass `data` as the argument to `showLatestsPosts()`.
 
 ```js
-assert.match(code, /\s*showLatestPosts\(data\);?\s*/);
+assert.match(code, /\s*showLatestPosts\(\s*data\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
index 30b892947f3..ea3f161f3f5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
@@ -20,7 +20,7 @@ assert.match(code, /\s*const\s+thousands\s*=/);
 Your should assign `Math.floor(views / 1000)` to your `thousands` variable.
 
 ```js
-assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(views\s*\/\s*1000\)\s*/);
+assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(\s*views\s*\/\s*1000\s*\)\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
index a62d9f5bb03..d850cf8e87f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
@@ -14,7 +14,7 @@ Inside the `if` statement, destructure `className` and `category` from the `allC
 You should destructure `className` and `category` from the `allCategories[id]` object. The properties can be in any order.
 
 ```js
-assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\[id\]\s*/g));
+assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\s*\[\s*id\s*\]\s*/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
index 25be4c3f2ca..9ae0aeecbc5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
@@ -27,19 +27,19 @@ Inside your `fetchData` function, add a `try...catch` statement. The `catch` blo
 You should have a `try` block inside your `fetchData` function.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
 ```
 
 You should have a `catch` block after your `try` block.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
 ```
 
 Your `catch` block should have an `err` parameter.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
 ```
 
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
index 7bfcbcb86b6..c34b67572c6 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+postsContainer\s*=/);
 You should use `document.getElementById()` to get the `#posts-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)posts-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/);
 ```
 
 You should assign the `#posts-container` element to your `postsContainer` variable.
 
 ```js
-assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(('|"|`)posts-container\1\)/g));
+assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
index 696a11ddbf4..e5af69a01c3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
@@ -14,7 +14,7 @@ You will be using this as an event listener for the `sortButton`. Because button
 Your `sortInputArray` function should call `event.preventDefault()`.
 
 ```js
-assert.match(sortInputArray.toString(), /event\.preventDefault\(\)/);
+assert.match(sortInputArray.toString(), /event\.preventDefault\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
index 98a6abfa589..bfd4bfd5b36 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*
 You should assign `temp` the value of `array[j]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?/);
 ```
 
 You should assign `array[j]` the value of `array[j + 1]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?/);
 ```
 
 You should assign `array[j + 1]` the value of `temp`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
index 3fba373cc85..355ef91f44a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished executing, return the sorted array.
 You should `return` the `array` variable.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
index 31d345ce216..f544c9606e3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
@@ -17,7 +17,7 @@ You should remove your `console.log()` call.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(bubbleSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(bubbleSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
index cf36e19dadd..51510d64558 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{
 You should assign `array[i]` to `temp`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]/)
 ```
 
 You should assign `array[minIndex]` to `array[i]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]/)
 ```
 
 You should assign `temp` to `array[minIndex]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
index 018d21464b8..a20efe2965c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished, you need to return the array. Once
 You should `return` the `array` after your outer loop completes.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
index f06b0a647d8..ca9cfc178b4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
@@ -15,7 +15,7 @@ You should remove the `console.log()` statement from `selectionSort()`.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(selectionSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(selectionSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
index 9135e573f29..ee2c5038418 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
@@ -16,7 +16,7 @@ Do so by assigning the value at the `j` index to the next index.
 Before decrementing `j`, assign the value at `j` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
index 0d90f99f329..ffa2e7c40df 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
@@ -16,7 +16,7 @@ Use the assignment operator to insert your current value into the correct index.
 You should assign `currValue` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
+assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
index 99a0f6ffec8..dd54b75b1e8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
@@ -14,7 +14,7 @@ After your `for` loop has finished, you need to return the array. You should the
 You should `return` the `array`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
index a40e7d31cfa..21628a812c8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
@@ -11,7 +11,7 @@ dashedName: step-3
 
 开发者控制台将包含你的代码产生的错误，但你也可以使用它来查看代码中变量的值，这有助于调试。
 
-Add a `console.log("Hello World");` line between your `script` tags. Then click the "Console" button to open the console. You should see the text `Hello World`.
+Add a `console.log("Hello World");` line between your `script` tags. Then click the "Console" button to open the console. You should see the text `"Hello World"`.
 
 请注意该行如何以分号结尾。 JavaScript 中的常见做法是用分号结束代码行。
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
index 9ecf5b54d2c..73e239b2fe9 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
@@ -10,10 +10,10 @@ dashedName: step-7
 变量可以被<dfn>赋予</dfn>一个值。 当你声明变量时，这个步骤叫作<dfn>初始化</dfn>。 例如：
 
 ```js
-let camperbot = "Bot";
+let age = 32;
 ```
 
-This would initialize the `camperbot` variable with a value of `Bot`, a string.
+This would initialize the `age` variable with a value of `32`, a number.
 
 Initialize your `xp` variable to have a value of `0`, a number.
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
index 7ccf941e9f0..67af1aba0b1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
@@ -15,7 +15,7 @@ let order = ["first", "second", "third"];
 
 This is an array which holds three values. Notice how the values are separated by commas.
 
-Change your `inventory` variable to be an array with the strings `stick`, `dagger`, and `sword`.
+Change your `inventory` variable to be an array with the strings `"stick"`, `"dagger"`, and `"sword"`.
 
 # --hints--
 
@@ -31,19 +31,19 @@ Your `inventory` variable should have three values.
 assert.lengthOf(inventory, 3);
 ```
 
-Your `inventory` variable should include the string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
 ```
 
-Your `inventory` variable should include the string `dagger`.
+Your `inventory` variable should include the string `"dagger"`.
 
 ```js
 assert.include(inventory, "dagger");
 ```
 
-Your `inventory` variable should include the string `sword`.
+Your `inventory` variable should include the string `"sword"`.
 
 ```js
 assert.include(inventory, "sword");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
index ed869621e91..34244e6de0f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-For now, you want the player to start with just the `stick`. Change the `inventory` array to have `stick` as its only value.
+For now, you want the player to start with just the `"stick"`. Change the `inventory` array to have `"stick"` as its only value.
 
 # --hints--
 
@@ -23,7 +23,7 @@ Your `inventory` variable should only have one value.
 assert.lengthOf(inventory, 1);
 ```
 
-Your `inventory` variable should include the string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
index f47e43a5512..6d65ef3bafa 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
@@ -33,10 +33,10 @@ You should use `document.querySelector()`.
 assert.match(code, /document\.querySelector/);
 ```
 
-You should use the `#button1` selector.
+You should use the `"#button1"` selector.
 
 ```js
-assert.match(code, /querySelector\(('|")#button1\1\)/);
+assert.match(code, /querySelector\(\s*('|")#button1\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
index 2079c79cea4..82eb34f950b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
@@ -9,12 +9,14 @@ dashedName: step-40
 
 `button1` represents your first `button` element. These elements have a special property called `onclick`, which you can use to determine what happens when someone clicks that button.
 
-You can access properties in JavaScript a couple of different ways. The first is with <dfn>dot notation</dfn>. Accessing the `onclick` property of a button would look like:
+You can access properties in JavaScript a couple of different ways. The first is with <dfn>dot notation</dfn>. Here is an example of using dot notation to set the `onclick` property of a button to a function reference.
 
 ```js
-button.onclick
+button.onclick = myFunction;
 ```
 
+In this example, `button` is the button element, and `myFunction` is a reference to a function. When the button is clicked, `myFunction` will be called.
+
 Use dot notation to set the `onclick` property of your `button1` to the function reference of `goStore`. Note that `button1` is already declared, so you don't need to use `let` or `const`.
 
 # --hints--
@@ -31,10 +33,10 @@ You should not use `let` or `const`.
 assert.notMatch(code, /(let|const)\s+button1\.onclick/);
 ```
 
-You should assign the `goStore` function reference to `button1.onclick`.
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button1\.onclick\s*=\s*goStore/);
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
index 7d695d9a799..8dc629df783 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
@@ -13,6 +13,12 @@ Once you have done that, open your console and try clicking the buttons on your
 
 # --hints--
 
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
+
+```js
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
+```
+
 You should use dot notation to access the `onclick` property of `button2`.
 
 ```js
@@ -25,10 +31,10 @@ You should not use `let` or `const` to assign `button2.onclick`.
 assert.notMatch(code, /(let|const)\s+button2\.onclick/);
 ```
 
-You should set the `onclick` property of `button2` to the variable `goCave`.
+You should assign the `goCave` function reference to `button2.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button2\.onclick\s*=\s*goCave/);
+assert.match(code, /button2\.onclick\s*=\s*goCave\s*;?\s*$/m);
 ```
 
 You should use dot notation to access the `onclick` property of `button3`.
@@ -43,10 +49,10 @@ You should not use `let` or `const` to assign `button3.onclick`.
 assert.notMatch(code, /(let|const)\s+button3\.onclick/);
 ```
 
-You should set the `onclick` property of `button3` to the variable `fightDragon`.
+You should assign the `fightDragon` function reference to `button3.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button3\.onclick\s*=\s*fightDragon/);
+assert.match(code, /button3\.onclick\s*=\s*fightDragon\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
index bbe411c3e9f..b700071c264 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-For now, make your `goStore` function output the message `Going to store.` to the console. For example, here is a function that outputs the message `Hello World`.
+For now, make your `goStore` function output the message `"Going to store."` to the console. For example, here is a function that outputs the message `"Hello World"`.
 
 ```js
 function functionName() {
@@ -20,13 +20,13 @@ function functionName() {
 You should have a `console.log("Going to store.");` line in your code. Don't forget the semi-colon.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to store\.\1\);/);
+assert.match(code, /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 Your `console.log("Going to store.");` line should be in your `goStore` function.
 
 ```js
-assert.match(goStore.toString(), /console\.log\(('|")Going to store\.\1\);/);
+assert.match(goStore.toString(), /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
index 5a4b7784f56..0bed3fd1611 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
@@ -7,7 +7,7 @@ dashedName: step-37
 
 # --description--
 
-Now create a `goCave` function that prints `Going to cave.` to the console.
+Now create a `goCave` function that prints `"Going to cave."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(goCave);
 You should have a `console.log("Going to cave.");` line in your code.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 Your `console.log("Going to cave.");` line should be inside your `goCave` function.
 
 ```js
-assert.match(goCave.toString(), /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(goCave.toString(), /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
index c6a3be3f4ef..ec00c4dcc63 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
@@ -7,7 +7,7 @@ dashedName: step-38
 
 # --description--
 
-Now create a `fightDragon` function that prints `Fighting dragon.` to the console.
+Now create a `fightDragon` function that prints `"Fighting dragon."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(fightDragon);
 You should have a `console.log("Fighting dragon.");` line in your code.
 
 ```js
-assert.match(code, /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 Your `console.log("Fighting dragon.");` line should be inside your `fightDragon` function.
 
 ```js
-assert.match(fightDragon.toString(), /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(fightDragon.toString(), /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
index 16ef9e47408..5dfdf8e8037 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
@@ -9,21 +9,25 @@ dashedName: step-42
 
 The `innerText` property controls the text that appears in an HTML element. 例如：
 
-```js
-const info = document.querySelector("#info");
-info.innerText = "Hello World";
+```html
+<p id="info">Demo content</p> 
 ```
 
-This code would change the element assigned to the `info` variable to have the text `Hello World`.
+```js
+const info = document.querySelector("#info"); 
+info.innerText = "Hello World"; 
+```
 
-When a player clicks your `Go to store` button, you want to change the buttons and text. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `Buy 10 health (10 gold)`.
+The following example would change the text of the `p` element from `Demo content` to `Hello World`.
+
+When a player clicks your `Go to store` button, you want to change the buttons and text. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `"Buy 10 health (10 gold)"`.
 
 # --hints--
 
 You should not have a `console.log("Going to store.");` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(('|")Going to store\.\1\)/);
+assert.notMatch(code, /console\.log\(\s*('|")Going to store\.\1\s*\)/);
 ```
 
 You should use dot notation to access the `innerText` property of `button1`.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
index 7f064499392..348ddb37960 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, add a line that updates the text of `button2` to say `Buy weapon (30 gold)` and update the text of `button3` to say `Go to town square`.
+Now, add a line that updates the text of `button2` to say `"Buy weapon (30 gold)"` and update the text of `button3` to say `"Go to town square"`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button2\.innerText/);
 ```
 
-You should update the `innerText` property of `button2` to be `Buy weapon (30 gold)`.
+You should update the `innerText` property of `button2` to be `"Buy weapon (30 gold)"`.
 
 ```js
 assert.match(code, /button2\.innerText\s*=\s*('|")Buy weapon \(30 gold\)\1/);
@@ -47,7 +47,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button3\.innerText/);
 ```
 
-You should update the `innerText` property of `button3` to be `Go to town square`.
+You should update the `innerText` property of `button3` to be `"Go to town square"`.
 
 ```js
 assert.match(code, /button3\.innerText\s*=\s*('|")Go to town square\1/);
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
index a58f06032e8..f36eb55354a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Now you need to modify your display text. Change the `innerText` property of the `text` to be `You enter the store.`.
+Now you need to modify your display text. Change the `innerText` property of the `text` to be `"You enter the store."`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `text`
 assert.notMatch(code, /(let|const)\s+text\.innerText/);
 ```
 
-You should update the `innerText` property of `text` to be `You enter the store.`.
+You should update the `innerText` property of `text` to be `"You enter the store."`.
 
 ```js
 assert.match(code, /text\.innerText\s*=\s*('|")You enter the store.\1/);
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
index 2db8287b699..aa63b841e0e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
@@ -7,25 +7,25 @@ dashedName: step-48
 
 # --description--
 
-In your `goTown` function, change your `button` elements' `innerText` properties to be `Go to store`, `Go to cave`, and `Fight dragon`. Update your `onclick` properties to be `goStore`, `goCave`, and `fightDragon`, respectively.
+In your `goTown` function, change your `button` elements' `innerText` properties to be `"Go to store"`, `"Go to cave"`, and `"Fight dragon"`. Update your `onclick` properties to be `goStore`, `goCave`, and `fightDragon`, respectively.
 
-Finally, update `innerText` property of your `text` to be `You are in the town square. You see a sign that says Store.`.
+Finally, update `innerText` property of your `text` to be `"You are in the town square. You see a sign that says Store."`.
 
 # --hints--
 
-You should set the `button1.innerText` property to be `Go to store` in your `goTown` function.
+You should set the `button1.innerText` property to be `"Go to store"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-You should set the `button2.innerText` property to be `Go to cave` in your `goTown` function.
+You should set the `button2.innerText` property to be `"Go to cave"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-You should set the `button3.innerText` property to be `Fight dragon` in your `goTown` function.
+You should set the `button3.innerText` property to be `"Fight dragon"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -49,7 +49,7 @@ You should set the `button3.onclick` property to be `fightDragon` in your `goTow
 assert.match(goTown.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-You should set the `text.innerText` property to be `You are in the town square. You see a sign that says Store.` in your `goTown` function.
+You should set the `text.innerText` property to be `"You are in the town square. You see a sign that says Store."` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /text\.innerText\s*=\s*('|")You are in the town square. You see a sign that says Store\.\1/);
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
index c7bb03fca20..56ddb17ead1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
@@ -28,7 +28,7 @@ assert.match(code, /function\s+update/);
 Your `update` function should take a parameter called `location`.
 
 ```js
-assert.match(update.toString(), /update\(location\)/);
+assert.match(update.toString(), /update\(\s*location\s*\)/);
 ```
 
 Your `update` function should be empty.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
index 8d1d5387944..76021312584 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. For example, here is an object with a key of `name` set to `Quincy Larson`.
+Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. For example, here is an object with a key of `name` set to `"Quincy Larson"`.
 
 ```js
 {
@@ -15,7 +15,7 @@ Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is t
 }
 ```
 
-Add a `name` property to your empty object and give it a value of `town square`.
+Add a `name` property to your empty object and give it a value of `"town square"`.
 
 # --hints--
 
@@ -31,7 +31,7 @@ Your first value of `locations` should have a `name` property.
 assert.isDefined(locations[0].name);
 ```
 
-Your first value of `locations` should have a `name` property with a value of `town square`.
+Your first value of `locations` should have a `name` property with a value of `"town square"`.
 
 ```js
 assert.equal(locations[0].name, "town square");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
index f691d01998a..a19d2720da1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
@@ -25,19 +25,19 @@ assert.isString(locations[0]["button text"][1]);
 assert.isString(locations[0]["button text"][2]);
 ```
 
-The first value in the `button text` array should be "Go to store".
+The first value in the `button text` array should be `"Go to store"`.
 
 ```js
 assert.equal(locations[0]["button text"][0], "Go to store");
 ```
 
-The second value in the `button text` array should be "Go to cave".
+The second value in the `button text` array should be `"Go to cave"`.
 
 ```js
 assert.equal(locations[0]["button text"][1], "Go to cave");
 ```
 
-The third value in the `button text` array should be "Fight dragon".
+The third value in the `button text` array should be `"Fight dragon"`.
 
 ```js
 assert.equal(locations[0]["button text"][2], "Fight dragon");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
index 06ac8152b56..84e45e41224 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
@@ -23,7 +23,7 @@ Your `text` property should be a string.
 assert.isString(locations[0]["text"]);
 ```
 
-Your `text` property should have the value `You are in the town square. You see a sign that says \"Store\".`
+Your `text` property should have the value `"You are in the town square. You see a sign that says \"Store\"."`
 
 ```js
 assert.equal(locations[0]["text"], "You are in the town square. You see a sign that says \"Store\".");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
index a148abeb3f3..57106351dee 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
@@ -37,7 +37,7 @@ Your second `locations` object should have a `button text` property which is an
 assert.isArray(locations[1]["button text"]);
 ```
 
-Your `button text` property should have the string values `Buy 10 health (10 gold)`, `Buy weapon (30 gold)`, and `Go to town square`.
+Your `button text` property should have the string values `"Buy 10 health (10 gold)"`, `"Buy weapon (30 gold)"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[1]["button text"][0], "Buy 10 health (10 gold)");
@@ -65,7 +65,7 @@ Your second `locations` object should have a `text` property which is a string.
 assert.isString(locations[1].text);
 ```
 
-Your second `locations` object should have a `text` property with the value of `You enter the store.`.
+Your second `locations` object should have a `text` property with the value of `"You enter the store."`.
 
 ```js
 assert.equal(locations[1].text, "You enter the store.");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
index 2daa786425a..de014eb7d80 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
@@ -11,19 +11,19 @@ Now you can consolidate some of your code. Start by copying the code from inside
 
 # --hints--
 
-Your `update` function should set `button1.innerText` to `Go to store`.
+Your `update` function should set `button1.innerText` to `"Go to store"`.
 
 ```js
 assert.match(update.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-Your `update` function should set `button2.innerText` to `Go to cave`.
+Your `update` function should set `button2.innerText` to `"Go to cave"`.
 
 ```js
 assert.match(update.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-Your `update` function should set `button3.innerText` to `Fight dragon`.
+Your `update` function should set `button3.innerText` to `"Fight dragon"`.
 
 ```js
 assert.match(update.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -47,7 +47,7 @@ Your `update` function should set `button3.onclick` to `fightDragon`.
 assert.match(update.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-Your `update` function should set `text.innerText` to `You are in the town square. You see a sign that says \"Store\".`.
+Your `update` function should set `text.innerText` to `"You are in the town square. You see a sign that says \"Store\"."`.
 
 ```js
 assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town square. You see a sign that says \\"Store\\"\."/);
@@ -56,13 +56,13 @@ assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town squa
 Your `goTown` function should be empty.
 
 ```js
-assert.match(goTown.toString(), /function goTown\(\) \{\}/);
+assert.match(goTown.toString(), /function goTown\(\s*\) \{\}/);
 ```
 
 Your `goStore` function should be empty.
 
 ```js
-assert.match(goStore.toString(), /function goStore\(\) \{\}/);
+assert.match(goStore.toString(), /function goStore\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
index 14f4d96707a..34243291715 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
@@ -20,13 +20,13 @@ myFunction();
 You should call the `update` function in the `goTown` function.
 
 ```js
-assert.match(goTown.toString(), /update\(\)/);
+assert.match(goTown.toString(), /update\(\s*\)/);
 ```
 
 Don't forget your ending semi-colon.
 
 ```js
-assert.match(goTown.toString(), /update\(\);/);
+assert.match(goTown.toString(), /update\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
index 5442dc821d6..5038b4a8af4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
@@ -20,7 +20,7 @@ Pass your `locations` array into the `update` call.
 You should pass the `locations` array into the `update` call.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
index 88db3f97fb6..99ed4fed3d4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
@@ -7,7 +7,7 @@ dashedName: step-62
 
 # --description--
 
-The `locations` array contains two locations: the `town square` and the `store`. Currently you are passing that entire array into the `update` function.
+The `locations` array contains two locations: the `"town square"` and the `"store"`. Currently you are passing that entire array into the `update` function.
 
 Pass in only the first element of the `locations` array by adding `[0]` at the end of the variable. For example: `myFunction(arg[0]);`.
 
@@ -18,25 +18,25 @@ This is called <dfn>bracket notation</dfn>. Values in an array are accessed by i
 You should use bracket notation with `locations`.
 
 ```js
-assert.match(code, /locations\[/);
+assert.match(code, /locations\s*\[/);
 ```
 
 You should access the first object in the `locations` array. Remember that arrays are zero-based.
 
 ```js
-assert.match(code, /locations\[0\]/);
+assert.match(code, /locations\s*\[\s*0\s*\]/);
 ```
 
 You should pass the first object in the `locations` array into the `update` function.
 
 ```js
-assert.match(code, /update\(locations\[0\]\);/);
+assert.match(code, /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 This call should still be in your `goTown()` function.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\[0\]\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
index 1795a7f5a77..a8a0afb77eb 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
@@ -9,20 +9,20 @@ dashedName: step-63
 
 Now your `update` function needs to use the argument you pass into it.
 
-Inside the `update` function, change the value of the `button1.innerText` assignment to be `location["button text"]`. That way, you use bracket notation to get the `button text` property of the `location` object passed into the function.
+Inside the `update` function, change the value of the `button1.innerText` assignment to be `location["button text"]`. That way, you use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 # --hints--
 
-Your `update` function should use bracket notation to get the `button text` property of the `location` object passed into the function.
+Your `update` function should use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 ```js
 assert.match(update.toString(), /location[('|")button text\1]/);
 ```
 
-You should assign the value of the `button text` property of the `location` object to the `innerText` property of `button1`.
+You should assign the value of the `"button text"` property of the `location` object to the `innerText` property of `button1`.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
index fbadd48ed0a..d2004f9f528 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
@@ -7,20 +7,20 @@ dashedName: step-64
 
 # --description--
 
-`location["button text"]` is an array with three elements. Change the `button1.innerText` assignment to be the first element of that array instead.
+`location["button text"]` is an array with three elements. Change the `button1.innerText` assignment to be `location["button text"][0]` which represents the first element of the array.
 
 # --hints--
 
-You should access the first element of the `button text` property of the `location` parameter.
+You should access the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.innerText` property to be the first element of the `button text` property of the `location` parameter.
+You should set the `button1.innerText` property to be the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
index 32f2d77a17b..80655118f25 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
@@ -7,32 +7,32 @@ dashedName: step-65
 
 # --description--
 
-Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `button text` array, respectively.
+Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `"button text"` array, respectively.
 
 # --hints--
 
-You should access the second element of the `button text` property of the `location` parameter.
+You should access the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.innerText` property to be the second element of the `button text` property of the `location` parameter.
+You should set the `button2.innerText` property to be the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.innerText\s*=\s*location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /button2\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button text` property of the `location` parameter.
+You should access the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.innerText` property to be the third element of the `button text` property of the `location` parameter.
+You should set the `button3.innerText` property to be the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.innerText\s*=\s*location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /button3\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
index 596dfe9464e..0027fe18399 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
@@ -7,44 +7,44 @@ dashedName: step-66
 
 # --description--
 
-Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `button functions` array.
+Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `"button functions"` array.
 
 # --hints--
 
-You should access the first element of the `button functions` property of the `location` parameter.
+You should access the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.onclick` property to be the first element of the `button functions` property of the `location` parameter.
+You should set the `button1.onclick` property to be the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.onclick\s*=\s*location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /button1\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should access the second element of the `button functions` property of the `location` parameter.
+You should access the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.onclick` property to be the second element of the `button functions` property of the `location` parameter.
+You should set the `button2.onclick` property to be the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.onclick\s*=\s*location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /button2\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button functions` property of the `location` parameter.
+You should access the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.onclick` property to be the third element of the `button functions` property of the `location` parameter.
+You should set the `button3.onclick` property to be the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.onclick\s*=\s*location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /button3\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
index d4b268e6f92..178203117f5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
@@ -22,7 +22,7 @@ assert.match(goStore.toString(), /update\(/);
 Your `goStore` function should pass the second element of the `locations` array as your argument to `update()`.
 
 ```js
-assert.match(goStore.toString(), /update\(locations\[1\]\)/);
+assert.match(goStore.toString(), /update\(\s*locations\s*\[\s*1\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
index e4c961ae96e..3b5a1067370 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
@@ -26,13 +26,13 @@ assert.isFunction(fightBeast);
 `fightSlime` should be empty.
 
 ```js
-assert.match(fightSlime.toString(), /function fightSlime\(\) \{\}/);
+assert.match(fightSlime.toString(), /function fightSlime\(\s*\) \{\}/);
 ```
 
 `fightBeast` should be empty.
 
 ```js
-assert.match(fightBeast.toString(), /function fightBeast\(\) \{\}/);
+assert.match(fightBeast.toString(), /function fightBeast\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
index b7ae9191616..463b1c616bb 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
@@ -9,14 +9,13 @@ dashedName: step-70
 
 Add a third object to the `locations` array. Give it the same properties as the other two objects.
 
-Set `name` to `cave`. Set `button text` to an array with the strings `Fight slime`, `Fight fanged beast`, and `Go to town square`. Set the `button functions` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `You enter the cave. You see some monsters.`.
+Set `name` to `cave`. Set `button text` to an array with the strings `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`. Set the `"button functions"` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `"You enter the cave. You see some monsters."`.
 
 # --hints--
 
 You should have three values in your `locations` array.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 3);
 ```
 
@@ -26,19 +25,19 @@ Your third `locations` value should be an object.
 assert.isObject(locations[2]);
 ```
 
-Your third `locations` object should have a `name` property with the value of `cave`.
+Your third `locations` object should have a `name` property with the value of `"cave"`.
 
 ```js
 assert.equal(locations[2].name, "cave");
 ```
 
-Your third `locations` object should have a `button text` property which is an array.
+Your third `locations` object should have a `"button text"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button text"]);
 ```
 
-Your `button text` property should have the string values `Fight slime`, `Fight fanged beast`, and `Go to town square`.
+Your `"button text"` property should have the string values `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[2]["button text"][0], "Fight slime");
@@ -46,13 +45,13 @@ assert.equal(locations[2]["button text"][1], "Fight fanged beast");
 assert.equal(locations[2]["button text"][2], "Go to town square");
 ```
 
-Your third `locations` object should have a `button functions` property which is an array.
+Your third `locations` object should have a `"button functions"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button functions"]);
 ```
 
-Your `button functions` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
+Your `"button functions"` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
 
 ```js
 assert.equal(locations[2]["button functions"][0], fightSlime);
@@ -66,7 +65,7 @@ Your third `locations` object should have a `text` property which is a string.
 assert.isString(locations[2].text);
 ```
 
-Your third `locations` object should have a `text` property with the value of `You enter the cave. You see some monsters.`.
+Your third `locations` object should have a `text` property with the value of `"You enter the cave. You see some monsters."`.
 
 ```js
 assert.equal(locations[2].text, "You enter the cave. You see some monsters.");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
index 40508b14b96..0c7619c85f7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
@@ -7,7 +7,7 @@ dashedName: step-71
 
 # --description--
 
-Now that you have a `cave` location object, update your `goCave` function to call `update` and pass that new `cave` location. Remember that this is the third element in your `locations` array.
+Now that you have a `"cave"` location object, update your `goCave` function to call `update` and pass that new `"cave"` location. Remember that this is the third element in your `locations` array.
 
 Don't forget to remove your `console.log` call!
 
@@ -16,19 +16,19 @@ Don't forget to remove your `console.log` call!
 You should use bracket notation to access the third element in your `locations` array.
 
 ```js
-assert.match(code, /locations\[2\]/);
+assert.match(code, /locations\s*\[\s*2\s*\]/);
 ```
 
 You should pass the third element in your `locations` array to `update`.
 
 ```js
-assert.match(code, /update\(locations\[2\]\)/);
+assert.match(code, /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 You should call `update` with the third element in your `locations` array in your `goCave` function.
 
 ```js
-assert.match(goCave.toString(), /update\(locations\[2\]\)/);
+assert.match(goCave.toString(), /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 You should not have the `console.log` statement in your `goCave` function.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
index 75cde938bc5..87cc4e926d4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
@@ -7,7 +7,7 @@ dashedName: step-72
 
 # --description--
 
-Now that your `store` and `cave` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
+Now that your `"store"` and `"cave"` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
 
 For example, here is how you would set `num` equal to `5` less than `num`: `num = num - 5;`.
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
index 50b6c7a65db..7b620e3a1d9 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
@@ -19,7 +19,7 @@ const total = document.querySelector('#total');
 total.innerText = value;
 ```
 
-You can test this by clicking your "Go to store" button, followed by your "Buy Health" button.
+You can test this by clicking your `"Go to store"` button, followed by your `"Buy Health"` button.
 
 **Note:** Your answer should only be two lines of code.
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
index 087d1e5a256..a8e908ac7f6 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
@@ -7,17 +7,20 @@ dashedName: step-76
 
 # --description--
 
-What if the player doesn't have enough gold to buy health? When you want to run code conditionally, you can use the `if` statement. Put all of the code in your `buyHealth` function inside an `if` statement. 例如：
+What if the player doesn't have enough gold to buy health? When you want to run code conditionally, you can use the <dfn>if</dfn> statement.
+
+An `if` statement is used to make decisions in code. The keyword `if` is followed by a condition in parentheses. If the condition is true, the code inside the curly braces `{}` is executed. If the condition is false, the code inside the curly braces is skipped.
+
+Here is an example of an `if` statement:
 
 ```js
-function myFunction() {
-  if ("condition") {
-    console.log("Hello World!");
-  }
+const num = 5;
+if (num >= 3) {
+  console.log("This code will run because num is greater than or equal to 3.");
 }
 ```
 
-For now, the `if` statement condition should be set to the string `condition` as a placeholder.
+Start by placing all of the code in your `buyHealth` function inside an `if` statement. For the `if` statement condition, check if `gold` is greater than or equal to `10`.
 
 # --hints--
 
@@ -27,16 +30,16 @@ Your `buyHealth` function should have an `if` statement.
 assert.match(buyHealth.toString(), /if/);
 ```
 
-Your `if` statement should have the string `condition` for the condition.
+Your `if` statement should check if `gold` is greater than or equal to `10`.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)/);
 ```
 
 All of your `buyHealth` code should be inside the `if` statement.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)\s*\{[\s\S]*\}/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)\s*{\s*gold\s*-=\s*10;\s*health\s*\+=\s*10;\s*goldText\.innerText\s*=\s*gold;\s*healthText\.innerText\s*=\s*health;\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
index 88a668ce31c..051ddd2f2d7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c5db7888af27af23f0dd
-title: 步骤 78
+title: Step 77
 challengeType: 0
-dashedName: step-78
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
index ef134a664c5..1498e6c09c4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8c65b75664c28a8e59c16
-title: 步骤 79
+title: Step 78
 challengeType: 0
-dashedName: step-79
+dashedName: step-78
 ---
 
 # --description--
 
-Inside the `else` statement, set `text.innerText` to equal `You do not have enough gold to buy health.`.
+Inside the `else` statement, set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 # --hints--
 
-Your `buyHealth` function should set `text.innerText` to equal `You do not have enough gold to buy health.`.
+Your `buyHealth` function should set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 ```js
 assert.match(buyHealth.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy health\.\1/);
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
index 899fa426fce..f38b4906897 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c6815f5f1a29735efe1b
-title: 步骤 80
+title: Step 79
 challengeType: 0
-dashedName: step-80
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
index 5ad73ee67c0..b2dc007106e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c7322e42962ad53ad204
-title: 第 81 步
+title: Step 80
 challengeType: 0
-dashedName: step-81
+dashedName: step-80
 ---
 
 # --description--
 
-Just like your `locations` array, your `weapons` array will hold objects. Add four objects to the `weapons` array, each with two properties: `name` and `power`. The first should have the `name` set to `stick` and the `power` set to `5`. The second should be `dagger` and `30`. The third, `claw hammer` and `50`. The fourth, `sword` and `100`.
+Just like your `locations` array, your `weapons` array will hold objects. Add four objects to the `weapons` array, each with two properties: `name` and `power`. The first should have the `name` set to `"stick"` and the `power` set to `5`. The second should be `"dagger"` and `30`. The third, `"claw hammer"` and `50`. The fourth, `"sword"` and `100`.
 
 # --hints--
 
@@ -26,28 +26,28 @@ assert.isObject(weapons[2]);
 assert.isObject(weapons[3]);
 ```
 
-Your first `weapons` object should have the `name` set to `stick` and the `power` set to `5`.
+Your first `weapons` object should have the `name` set to `"stick"` and the `power` set to `5`.
 
 ```js
 assert.equal(weapons[0].name, 'stick');
 assert.equal(weapons[0].power, 5);
 ```
 
-Your second `weapons` object should have the `name` set to `dagger` and the `power` set to `30`.
+Your second `weapons` object should have the `name` set to `"dagger"` and the `power` set to `30`.
 
 ```js
 assert.equal(weapons[1].name, 'dagger');
 assert.equal(weapons[1].power, 30);
 ```
 
-Your third `weapons` object should have the `name` set to `claw hammer` and the `power` set to `50`.
+Your third `weapons` object should have the `name` set to `"claw hammer"` and the `power` set to `50`.
 
 ```js
 assert.equal(weapons[2].name, 'claw hammer');
 assert.equal(weapons[2].power, 50);
 ```
 
-Your fourth `weapons` object should have the `name` set to `sword` and the `power` set to `100`.
+Your fourth `weapons` object should have the `name` set to `"sword"` and the `power` set to `100`.
 
 ```js
 assert.equal(weapons[3].name, 'sword');
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
index afecbf202e6..dd8e2a5d9ec 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c7a59e72c02bb1c717d2
-title: 步骤 82
+title: Step 81
 challengeType: 0
-dashedName: step-82
+dashedName: step-81
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.include(buyWeapon.toString(), 'if');
 Your `if` statement should check if `gold` is greater than or equal to `30`.
 
 ```js
-assert.match(buyWeapon.toString(), /if\s*\(gold\s*>=\s*30\)/);
+assert.match(buyWeapon.toString(), /if\s*\(\s*gold\s*>=\s*30\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
index 66fd8be0a6f..570844fee8c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c89e4272512d44fc1c66
-title: 步骤 83
+title: Step 82
 challengeType: 0
-dashedName: step-83
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
index 417645c58d5..f7e010232a8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c8cee8e5cf2e001789b4
-title: 步骤 84
+title: Step 83
 challengeType: 0
-dashedName: step-84
+dashedName: step-83
 ---
 
 # --description--
 
-The value of the `currentWeapon` variable corresponds to an index in the `weapons` array. The player starts with a `stick`, since `currentWeapon` starts at `0` and `weapons[0]` is the `stick` weapon.
+The value of the `currentWeapon` variable corresponds to an index in the `weapons` array. The player starts with a `"stick"`, since `currentWeapon` starts at `0` and `weapons[0]` is the `"stick"` weapon.
 
 In the `buyWeapon` function, use compound assignment to add `1` to `currentWeapon` - the user is buying the next weapon in the `weapons` array.
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
index c2f3e4ec835..c2b63fbfcee 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ca22d29fe62f3952bdf5
-title: 步骤 85
+title: Step 84
 challengeType: 0
-dashedName: step-85
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
index 3a3efdd9326..8ebcf334d01 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8cb19bd7f8a304e5427a1
-title: 步骤 86
+title: Step 85
 challengeType: 0
-dashedName: step-86
+dashedName: step-85
 ---
 
 # --description--
 
-Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `You now have a new weapon.`.
+Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `"You now have a new weapon."`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should update the `innerText` property of the `goldText` element to be `gold
 assert.match(buyWeapon.toString(), /goldText\.innerText\s*=\s*gold/);
 ```
 
-You should update the `innerText` property of the `text` element to be `You now have a new weapon.`.
+You should update the `innerText` property of the `text` element to be `"You now have a new weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a new weapon\.\1/);
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
index 0e94b57ffb3..81ebba26eab 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cbd1e3595431d5a2b3f1
-title: 步骤 87
+title: Step 86
 challengeType: 0
-dashedName: step-87
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
index 59c48e24384..a55298fd7e8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cce1b0c32c33017cf2e9
-title: 步骤 88
+title: Step 87
 challengeType: 0
-dashedName: step-88
+dashedName: step-87
 ---
 
 # --description--
@@ -22,7 +22,7 @@ let value = array[index];
 You should update `newWeapon` to have the value of `weapons[currentWeapon]`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
index 4e1ec0f52b6..af0ce0a447a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ce1dfc990134162b3bd9
-title: 步骤 89
+title: Step 88
 challengeType: 0
-dashedName: step-89
+dashedName: step-88
 ---
 
 # --description--
@@ -14,7 +14,7 @@ dashedName: step-89
 You should update `newWeapon` to have the value of `weapons[currentWeapon].name`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]\.name;/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
index c37c6fbbfc4..a06ea68706d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8ce73d0dce43468f6689c
-title: 步骤 90
+title: Step 89
 challengeType: 0
-dashedName: step-90
+dashedName: step-89
 ---
 
 # --description--
 
-You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `You now have a new weapon.` string to say `You now have a` and the name of the new weapon. Remember to end the sentence with a period.
+You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `"You now have a new weapon."` string to say `"You now have a "` and the name of the new weapon. Remember to end the sentence with a period.
 
-Here is an example that creates the string `Hello, our name is freeCodeCamp.`:
+Here is an example that creates the string `"Hello, our name is freeCodeCamp."`:
 
 ```js
 const ourName = "freeCodeCamp";
@@ -18,7 +18,7 @@ const ourStr = "Hello, our name is " + ourName + ".";
 
 # --hints--
 
-You should update the `text.innerText` assignment to start with the string `You now have a`.
+You should update the `text.innerText` assignment to start with the string `"You now have a "`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a \1/);
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
index 3d27abeef2b..4f2ed89e0ac 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cf22272d6d35af80d4ac
-title: 步骤 91
+title: Step 90
 challengeType: 0
-dashedName: step-91
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
index ac892543ef7..fddaa343d3b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d0337d7c67377a4a76c6
-title: 步骤 92
+title: Step 91
 challengeType: 0
-dashedName: step-92
+dashedName: step-91
 ---
 
 # --description--
 
 Up until now, any time `text.innerText` was updated, the old text was erased. This time, use the `+=` operator to add text to the end of `text.innerText`.
 
-Add the string `In your inventory you have:` - include the spaces at the beginning and the end.
+Add the string `" In your inventory you have: "` - include the spaces at the beginning and the end.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should use the `+=` operator to add to `text.innerText`.
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*/)
 ```
 
-You should add the string `In your inventory you have:` to the end of `text.innerText`. Mind the spaces!
+You should add the string `" In your inventory you have: "` to the end of `text.innerText`. Mind the spaces!
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
index 03524014b80..d2d697233c5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d08668fa8b38732486e9
-title: 步骤 93
+title: Step 92
 challengeType: 0
-dashedName: step-93
+dashedName: step-92
 ---
 
 # --description--
@@ -11,7 +11,7 @@ At the end of the second `text.innerText` string you just added, use the concate
 
 # --hints--
 
-You should not change the `In your inventory you have:` string.
+You should not change the `" In your inventory you have: "` string.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
index 58216127698..08f3472f27d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d0c4f12c2239b6618582
-title: 步骤 94
+title: Step 93
 challengeType: 0
-dashedName: step-94
+dashedName: step-93
 ---
 
 # --description--
 
-Add an `else` statement to your `buyWeapon` function. In that statement, set `text.innerText` to equal `You do not have enough gold to buy a weapon.`.
+Add an `else` statement to your `buyWeapon` function. In that statement, set `text.innerText` to equal `"You do not have enough gold to buy a weapon."`.
 
 # --hints--
 
@@ -24,13 +24,13 @@ const split = buyWeapon.toString().split(/\s|\n/);
 assert.isAbove(split.indexOf('else'), split.indexOf('if'));
 ```
 
-You should set `text.innerText` to `You do not have enough gold to buy a weapon.`.
+You should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy a weapon.\1/);
 ```
 
-Your `else` statement should set `text.innerText` to `You do not have enough gold to buy a weapon.`.
+Your `else` statement should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 gold = 20;
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
index dfd52f58b0e..b8fe5b50826 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d0fdf2dad83a92883a80
-title: 步骤 95
+title: Step 94
 challengeType: 0
-dashedName: step-95
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
index b37b47ba2d0..0814d277818 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d143f2a58e3b6d6e9c33
-title: 步骤 96
+title: Step 95
 challengeType: 0
-dashedName: step-96
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
index fa3eca88c7b..821369edf60 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d1c72e8bb13c2074d93c
-title: 步骤 97
+title: Step 96
 challengeType: 0
-dashedName: step-97
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
index 7862e5a3360..5b21812459f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d2146a3e853d0a6e28ca
-title: 步骤 98
+title: Step 97
 challengeType: 0
-dashedName: step-98
+dashedName: step-97
 ---
 
 # --description--
 
-Add an `else` statement for your outer `if` statement. Inside this new `else` statement, set `text.innerText` to `You already have the most powerful weapon!`.
+Add an `else` statement for your outer `if` statement. Inside this new `else` statement, set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 # --hints--
 
@@ -18,13 +18,13 @@ const matches = buyWeapon.toString().match(/else/g);
 assert.equal(matches.length, 2);
 ```
 
-You should set `text.innerText` to `You already have the most powerful weapon!`.
+You should set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 ```js
 assert.match(buyWeapon.toString(), /('|")You already have the most powerful weapon!\1/);
 ```
 
-You should modify your `text.innerText` to `You already have the most powerful weapon!` within your outer `else` statement.
+You should modify your `text.innerText` to `"You already have the most powerful weapon!"` within your outer `else` statement.
 
 ```js
 currentWeapon = 5;
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
index 4d57ed37794..8adbb83ea32 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d24c97461b3ddb9397c8
-title: 步骤 99
+title: Step 98
 challengeType: 0
-dashedName: step-99
+dashedName: step-98
 ---
 
 # --description--
 
 Once a player has the most powerful weapon, you can give them the ability to sell their old weapons.
 
-In the outer `else` statement, set `button2.innerText` to `Sell weapon for 15 gold`. Also set `button2.onclick` to the function name `sellWeapon`.
+In the outer `else` statement, set `button2.innerText` to `"Sell weapon for 15 gold"`. Also set `button2.onclick` to the function name `sellWeapon`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should set the value of `button2.innerText`.
 assert.match(buyWeapon.toString(), /button2\.innerText/);
 ```
 
-You should set the value of `button2.innerText` to `Sell weapon for 15 gold`.
+You should set the value of `button2.innerText` to `"Sell weapon for 15 gold"`.
 
 ```js
 assert.match(buyWeapon.toString(), /button2\.innerText\s*=\s*('|")Sell weapon for 15 gold\1;/);
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
index c0500aa8fec..f239b5e07bb 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d2e2a073be3edb46116f
-title: 步骤 100
+title: Step 99
 challengeType: 0
-dashedName: step-100
+dashedName: step-99
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.isFunction(sellWeapon);
 `sellWeapon` should be an empty function.
 
 ```js
-assert.match(sellWeapon.toString(), /sellWeapon\(\)\s*\{\s*\}/);
+assert.match(sellWeapon.toString(), /sellWeapon\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
index d2ef514a9fa..3cf081b462d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d31ebbc10e3fe1b28e03
-title: 步骤 101
+title: Step 100
 challengeType: 0
-dashedName: step-101
+dashedName: step-100
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(sellWeapon.toString(), /if/);
 Your `if` statement should check if `inventory.length` is greater than `1`.
 
 ```js
-assert.match(sellWeapon.toString(), /if\s*\(inventory\.length\s*>\s*1\)/);
+assert.match(sellWeapon.toString(), /if\s*\(\s*inventory\.length\s*>\s*1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
index 3ec96439a64..e185edbdfe4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d35660db4040ba292193
-title: 步骤 102
+title: Step 101
 challengeType: 0
-dashedName: step-102
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
index dc7ff19f1ee..c9a8d067c6f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d382cd075f4169223e14
-title: 步骤 103
+title: Step 102
 challengeType: 0
-dashedName: step-103
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
index 78efc5a4c61..e6174703f8c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d539dc11cb42b5dd7ec8
-title: 步骤 104
+title: Step 103
 challengeType: 0
-dashedName: step-104
+dashedName: step-103
 ---
 
 # --description--
@@ -21,19 +21,19 @@ Use the `shift()` method to take the first element from the `inventory` array an
 Your `sellWeapon` function should use the `shift()` method.
 
 ```js
-assert.match(sellWeapon.toString(), /shift\(\)/);
+assert.match(sellWeapon.toString(), /shift\(\s*\)/);
 ```
 
 You should use the `shift()` method on the `inventory` array.
 
 ```js
-assert.match(sellWeapon.toString(), /inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /inventory\.shift\(\s*\)/);
 ```
 
 You should assign the value of `inventory.shift()` to your `currentWeapon` variable.
 
 ```js
-assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
index 2b533ac2834..9b5f9e125ed 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d61ddfe35744369365b7
-title: 步骤 105
+title: Step 104
 challengeType: 0
-dashedName: step-105
+dashedName: step-104
 ---
 
 # --description--
 
-After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `You sold a`, then `currentWeapon`, then the string `.`.
+After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `"You sold a "`, then `currentWeapon`, then the string `"."`.
 
 # --hints--
 
@@ -17,19 +17,19 @@ You should use the assignment operator with `text.innerText`.
 assert.match(sellWeapon.toString(), /text\.innerText\s*=/);
 ```
 
-You should add `You sold a` to `text.innerText`. Spacing is important.
+You should add `"You sold a "` to `text.innerText`. Spacing is important.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1/);
 ```
 
-You should add the value of `currentWeapon` to the `You sold a` string. Use the concatenation operator to do this on the same line.
+You should add the value of `currentWeapon` to the `"You sold a "` string. Use the concatenation operator to do this on the same line.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a\s\1\s*\+\s*\_currentWeapon/);
 ```
 
-You should add the string `.` to the value of `currentWeapon`. Use the concatenation operator to do this on the same line.
+You should add the string `"."` to the value of `currentWeapon`. Use the concatenation operator to do this on the same line.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1\s*\+\s*\_currentWeapon\s+\+\s+('|")\.\2/);
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
index 8a045469575..59c6c536b8b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d6c7001ebc45350e3d16
-title: 步骤 106
+title: Step 105
 challengeType: 0
-dashedName: step-106
+dashedName: step-105
 ---
 
 # --description--
 
-Now use the `+=` operator to add the string `In your inventory you have:` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `In your inventory you have:` string.
+Now use the `+=` operator to add the string `" In your inventory you have: "` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `" In your inventory you have: "` string.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const matches = sellWeapon.toString().match(/text\.innerText\s*\+=/g);
 assert.equal(matches.length, 1);
 ```
 
-You should add the string `In your inventory you have:` to the second `text.innerText` line. Spacing matters.
+You should add the string `" In your inventory you have: "` to the second `text.innerText` line. Spacing matters.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*\+=\s*('|") In your inventory you have: \1/);
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
index 14a6a6161c4..c7dfa1f9628 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d7b8ab568b4649998954
-title: 步骤 107
+title: Step 106
 challengeType: 0
-dashedName: step-107
+dashedName: step-106
 ---
 
 # --description--
 
-Use an `else` statement to run when the `inventory` length is not more than one. Set the `text.innerText` to say `Don't sell your only weapon!`.
+Use an `else` statement to run when the `inventory` length is not more than one. Set the `text.innerText` to say `"Don't sell your only weapon!"`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ Your `sellWeapon` function should have an `else` statement.
 assert.match(sellWeapon.toString(), /else/);
 ```
 
-You should set `text.innerText` to `Don't sell your only weapon!`.
+You should set `text.innerText` to `"Don't sell your only weapon!"`.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")Don't sell your only weapon!\1/);
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
index d2b5fa0aa7a..a8068715efb 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d81f539f004776dd9b1e
-title: 步骤 108
+title: Step 107
 challengeType: 0
-dashedName: step-108
+dashedName: step-107
 ---
 
 # --description--
 
 Now you can start the code to fight monsters. To keep your code organized, your `fightDragon` function has been moved for you to be near the other `fight` functions.
 
-Below your `weapons` array, define a `monsters` variable and assign it an array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. The first object's values should be `slime`, `2`, and `15`, in order. The second should be `fanged beast`, `8`, and `60`. The third should be `dragon`, `20`, and `300`.
+Below your `weapons` array, define a `monsters` variable and assign it an array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. The first object's values should be `"slime"`, `2`, and `15`, in order. The second should be `"fanged beast"`, `8`, and `60`. The third should be `"dragon"`, `20`, and `300`.
 
 # --hints--
 
@@ -37,7 +37,7 @@ Your `monsters` array should have 3 objects.
 assert(monsters.every(val => typeof val === "object"));
 ```
 
-The first value in your `monsters` array should be an object with a `name` property set to `slime`.
+The first value in your `monsters` array should be an object with a `name` property set to `"slime"`.
 
 ```js
 assert.equal(monsters[0].name, "slime");
@@ -55,7 +55,7 @@ The first value in your `monsters` array should be an object with a `health` pro
 assert.equal(monsters[0].health, 15);
 ```
 
-The second value in your `monsters` array should be an object with a `name` property set to `fanged beast`.
+The second value in your `monsters` array should be an object with a `name` property set to `"fanged beast"`.
 
 ```js
 assert.equal(monsters[1].name, "fanged beast");
@@ -73,7 +73,7 @@ The second value in your `monsters` array should be an object with a `health` pr
 assert.equal(monsters[1].health, 60);
 ```
 
-The third value in your `monsters` array should be an object with a `name` property set to `dragon`.
+The third value in your `monsters` array should be an object with a `name` property set to `"dragon"`.
 
 ```js
 assert.equal(monsters[2].name, "dragon");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
index 5beaa78b172..f21aeb538fa 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd468debb449b4454086
-title: 步骤 109
+title: Step 108
 challengeType: 0
-dashedName: step-109
+dashedName: step-108
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
index d3b16b61894..ca2db4faf54 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd9cdb16324b04cfd958
-title: 步骤 110
+title: Step 109
 challengeType: 0
-dashedName: step-110
+dashedName: step-109
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.notMatch(fightSlime.toString(), /let|const/);
 You should call the `goFight` function.
 
 ```js
-assert.match(fightSlime.toString(), /goFight\(\);/);
+assert.match(fightSlime.toString(), /goFight\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
index f820b85b506..dff775b563a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8dfcf7fb1044d2f478fd1
-title: 步骤 111
+title: Step 110
 challengeType: 0
-dashedName: step-111
+dashedName: step-110
 ---
 
 # --description--
 
-Following the same pattern, use that code in the `fightBeast` and `fightDragon` functions. Remember that `beast` is at index `1` and `dragon` is at index `2`. Also, remove the `console.log` call from your `fightDragon` function.
+Following the same pattern as the `fightSlime` function, use that code in the `fightBeast` and `fightDragon` functions. Remember that `beast` is at index `1` and `dragon` is at index `2`. Also, remove the `console.log` call from your `fightDragon` function.
 
 # --hints--
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
index 171c173b36b..fa62f97c4f9 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e0d1d0110b4ec421489f
-title: 步骤 112
+title: Step 111
 challengeType: 0
-dashedName: step-112
+dashedName: step-111
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
index c03049a03bb..9ff3ee038cb 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
@@ -1,20 +1,19 @@
 ---
 id: 62a8e142f7f0bd4fed898de3
-title: 步骤 113
+title: Step 112
 challengeType: 0
-dashedName: step-113
+dashedName: step-112
 ---
 
 # --description--
 
-Add a new object to the end of the `locations` array, following the same properties as the rest of the objects. Set `name` to `fight`, `button text` to an array with `Attack`, `Dodge`, and `Run`, `button functions` to an array with `attack`, `dodge`, and `goTown`, and `text` to `You are fighting a monster.`.
+Add a new object to the end of the `locations` array, following the same properties as the rest of the objects. Set `name` to `"fight"`, `"button text"` to an array with `"Attack"`, `"Dodge"`, and `"Run"`, `"button functions"` to an array with `attack`, `dodge`, and `goTown`, and `text` to `"You are fighting a monster."`.
 
 # --hints--
 
 Your `locations` array should have 4 values in it.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 4);
 ```
 
@@ -24,25 +23,25 @@ Your new value should be an object.
 assert.isObject(locations[3]);
 ```
 
-Your new object should have a `name` property set to `fight`.
+Your new object should have a `name` property set to `"fight"`.
 
 ```js
 assert.equal(locations[3].name, "fight");
 ```
 
-Your new object should have a `button text` property set to an array with the strings `Attack`, `Dodge`, and `Run`.
+Your new object should have a `"button text"` property set to an array with the strings `"Attack"`, `"Dodge"`, and `"Run"`.
 
 ```js
 assert.deepEqual(locations[3]["button text"], ["Attack", "Dodge", "Run"]);
 ```
 
-Your new object should have a `button functions` property set to an array with the variables `attack`, `dodge`, and `goTown`.
+Your new object should have a `"button functions"` property set to an array with the variables `attack`, `dodge`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[3]["button functions"], [attack, dodge, goTown]);
 ```
 
-Your new object should have a `text` property set to `You are fighting a monster.`.
+Your new object should have a `text` property set to `"You are fighting a monster."`.
 
 ```js
 assert.equal(locations[3].text, "You are fighting a monster.");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
index 44093786cae..1a6b6592b70 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e1dc897df55108bcb5e8
-title: 步骤 114
+title: Step 113
 challengeType: 0
-dashedName: step-114
+dashedName: step-113
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(goFight.toString(), /update/);
 You should pass the fourth object in your `locations` array to your `update` call.
 
 ```js
-assert.match(goFight.toString(), /update\(locations\[3\]\)/);
+assert.match(goFight.toString(), /update\(\s*locations\s*\[\s*3\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
index 1d8fb2400ff..2e11e5e73a1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e21398ad61520edb724f
-title: 步骤 115
+title: Step 114
 challengeType: 0
-dashedName: step-115
+dashedName: step-114
 ---
 
 # --description--
@@ -14,13 +14,13 @@ Below your `update` call, set the `monsterHealth` to be the health of the curren
 You should use bracket notation to access the `monsters` array at the `fighting` index.
 
 ```js
-assert.match(goFight.toString(), /monsters\[fighting\]/);
+assert.match(goFight.toString(), /monsters\s*\[\s*fighting\s*\]/);
 ```
 
 You should assign the value of `monsters[fighting]` to the `monsterHealth` variable.
 
 ```js
-assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\[fighting\](\.health|\[('|")health\2\])/);
+assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\s*\[\s*fighting\s*\]\s*(\.health|\[\s*('|")health\2\s*\])/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
index 070053ef951..3705a63ed05 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
@@ -1,18 +1,25 @@
 ---
 id: 62a8e24c673b075317cc0b09
-title: 步骤 116
+title: Step 115
 challengeType: 0
-dashedName: step-116
+dashedName: step-115
 ---
 
 # --description--
 
-The HTML element that shows the monster's stats has been hidden with CSS. Display the `monsterStats` element by updating the `display` property of the `style` property to `block`. For example, updating the `first` property of the `name` property of `user` would look like:
+By default, the HTML element that shows the monster's stats has been hidden with CSS. When the player clicks the "Fight dragon" button, the monster's stats should be displayed. You can accomplish this by using the <dfn>style</dfn> and <dfn>display</dfn> properties on the `monsterStats` element.
+
+The `style` property is used to access the inline style of an element and the `display` property is used to set the visibility of an element.
+
+Here is an example of how to update the display for a paragraph element:
 
 ```js
-user.name.first = "Naomi";
+const paragraph = document.querySelector('p');
+paragraph.style.display = 'block';
 ```
 
+Display the `monsterStats` element by updating the `display` property of the `style` property to `block`.
+
 # --hints--
 
 You should use dot notation to access the `style` property of `monsterStats`.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
index 74b6c109bcf..8629818b67e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e271f8e3d1541f9624ad
-title: 步骤 117
+title: Step 116
 challengeType: 0
-dashedName: step-117
+dashedName: step-116
 ---
 
 # --description--
 
-Now, set the `innerText` property of `monsterName` to be the `name` property of the current monster. Do the same for `monsterHealthText` and the `health` property.
+Now, you will need to update the text for the current monster's name and health.
+
+Start by assigning `monsters[fighting].name` to the `innerText` property of `monsterName`. Then, assign `monsterHealth` to the `innerText` property of `monsterHealthText`.
 
 # --hints--
 
@@ -17,10 +19,10 @@ You should use dot notation to access the `innerText` property of `monsterName`.
 assert.match(goFight.toString(), /monsterName\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterName` to be the `name` value of the current monster. Remember that you can get the current monster with `monsters[fighting]`.
+You should assign `monsters[fighting].name` to `monsterName.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\[fighting\]\.name/);
+assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 You should use dot notation to access the `innerText` property of `monsterHealthText`.
@@ -29,10 +31,10 @@ You should use dot notation to access the `innerText` property of `monsterHealth
 assert.match(goFight.toString(), /monsterHealthText\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterHealthText` to be the `health` value of the current monster. You can get the current monster with `monsters[fighting]` or you can access this value using the `monsterHealth` variable that you previously assigned.
+You should assign `monsterHealth` to `monsterHealthText.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\[fighting\]\.health/);
+assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.health/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
index ff493b3e69f..c715960538e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e35675c18c56354c08cf
-title: 步骤 118
+title: Step 117
 challengeType: 0
-dashedName: step-118
+dashedName: step-117
 ---
 
 # --description--
 
-Now you can build the `attack` function. First, update the `text` message to say `The <monster name> attacks.`, replacing `<monster name>` with the name of the monster. Remember you can use the concatenation operator for this.
+Now you can build the `attack` function. First, update the `text` message to say `"The <monster name> attacks."`, replacing `<monster name>` with the name of the monster. Remember you can use the concatenation operator for this.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1/);
 You should use the concatenation operator to add the value of `monsters[fighting].name` to the `The` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 You should use the concatenation operator to add the string `attacks.` to the `monsters[fighting].name` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name\s*\+\s*('|") attacks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name\s*\+\s*('|") attacks\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
index c9653b798ca..e062f34ae25 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e41e2f190c58404dd46e
-title: Step 119
+title: Step 118
 challengeType: 0
-dashedName: step-119
+dashedName: step-118
 ---
 
 # --description--
 
-On a new line, add the string `You attack it with your <weapon>.` to the `text` value, replacing `<weapon>` with the player's current weapon.
+On a new line, use the addition assignment operator(`+=`), to add the string `" You attack it with your <weapon>."` to the `text` value, replacing `<weapon>` with the player's current weapon. Additionally, remember that this line of text starts with a space so it will properly display.
 
 # --hints--
 
@@ -24,7 +24,7 @@ You should use compound assignment with `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=/);
 ```
 
-You should add the string `You attack it with your` to the `text.innerText` value. Remember that spacing matters.
+You should add the string `" You attack it with your "` to the `text.innerText` value. Remember that spacing matters.
 
 ```js
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1/);
@@ -33,13 +33,13 @@ assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it wit
 You should use the concatenation operator to add the current weapon to the string. You can get the current weapon with `weapons[currentWeapon].name`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name/);
 ```
 
-You should use the concatenation operator to end your string with `.`.
+You should use the concatenation operator to end your string with `"."`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name\s*\+\s*('|")\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*\+\s*('|")\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
index b361327a46e..689a350b599 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e45cc600c3591cee671a
-title: Step 120
+title: Step 119
 challengeType: 0
-dashedName: step-120
+dashedName: step-119
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(attack.toString(), /health\s*-=/);
 You should subtract the monster's current level from `health`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*monsters\[fighting\]\.level/);
+assert.match(attack.toString(), /health\s*-=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
index edbe68894a5..ac76865ed0a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e49f4df7af5ae2d7a616
-title: Step 121
+title: Step 120
 challengeType: 0
-dashedName: step-121
+dashedName: step-120
 ---
 
 # --description--
 
-Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon. Remember you have the `currentWeapon` variable and the `power` property.
+Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon.
+
+Remember that you can access the power of the player's current weapon using `weapons[currentWeapon].power`.
 
 # --hints--
 
@@ -20,19 +22,19 @@ assert.match(attack.toString(), /monsterHealth\s*-=/);
 You should use bracket notation with `currentWeapon` to access `weapons`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 You should use dot notation to access the `power` property of `weapons[currentWeapon]`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 You should subtract the `power` of the current weapon from `monsterHealth`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
index 7052a0ec1ea..01b05467403 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8e4dc6a60f85bf256a0cb
-title: Step 122
+title: Step 121
 challengeType: 0
-dashedName: step-122
+dashedName: step-121
 ---
 
 # --description--
 
 The `Math` object in JavaScript contains static properties and methods for mathematical constants and functions. One of those is `Math.random()`, which generates a random number from `0` (inclusive) to `1` (exclusive). Another is `Math.floor()`, which rounds a given number down to the nearest integer.
 
-Using these, you can generate a random number within a range. For example, this generates a random number between 1 and 5: `Math.floor(Math.random() * 5) + 1;`.
+Using these, you can generate a random number within a range. For example, this generates a random number between `1` and `5`: `Math.floor(Math.random() * 5) + 1;`.
 
 Following this pattern, use the addition operator (`+`) to add a random number between `1` and the value of `xp` to your `monsterHealth -= weapons[currentWeapon].power`.
 
@@ -24,7 +24,7 @@ assert.lengthOf(attack.toString().match(/monsterHealth/g), 1);
 You should add to the `weapons[currentWeapon].power` value.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+/);
 ```
 
 You should use `Math.floor()`.
@@ -42,25 +42,25 @@ assert.match(attack.toString(), /Math\.random/);
 You should multiply `Math.random()` by the value of `xp`.
 
 ```js
-assert.match(attack.toString(), /Math\.random\(\)\s*\*\s*xp/);
+assert.match(attack.toString(), /Math\.random\(\s*\)\s*\*\s*xp/);
 ```
 
 You should use `Math.floor()` to round the result of `Math.random() * xp` down.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\)\s*\*\s*xp\s*.*\)/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*.*\)/);
 ```
 
 You should add `1` to the result of `Math.floor()`.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 You should add the result of `Math.floor(Math.random() * xp) + 1` to the result of `weapons[currentWeapon].power`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
index d07c342c9ed..4931f15d514 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ed36d7a7915dfa444ba2
-title: Step 123
+title: Step 122
 challengeType: 0
-dashedName: step-123
+dashedName: step-122
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
index bd06c0196b4..8a466801582 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8edd05e27cc668051686f
-title: Step 124
+title: Step 123
 challengeType: 0
-dashedName: step-124
+dashedName: step-123
 ---
 
 # --description--
@@ -20,13 +20,13 @@ assert.match(attack.toString(), /if/);
 Your `if` statement should check if `health` is less than or equal to `0`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(health\s*<=\s*0\)/);
+assert.match(attack.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 ```
 
 你的 `if` 语句应该调用 `lose` 函数。
 
 ```js
-assert.match(attack.toString(), /lose\(\)/);
+assert.match(attack.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
index 9c80b8cd6b4..7b723a59545 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee154c8946678775c4a4
-title: Step 125
+title: Step 124
 challengeType: 0
-dashedName: step-125
+dashedName: step-124
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
index 6bbfbde991a..2929ee44bf5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee71f018e968a056d369
-title: Step 126
+title: Step 125
 challengeType: 0
-dashedName: step-126
+dashedName: step-125
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(code, /function\s+defeatMonster/);
 `defeatMonster` should be an empty function.
 
 ```js
-assert.match(defeatMonster.toString(), /defeatMonster\s*\(\)\s*\{\s*\}/);
+assert.match(defeatMonster.toString(), /defeatMonster\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 You should use the `function` keyword to declare `lose`.
@@ -32,7 +32,7 @@ assert.match(code, /function\s+lose/);
 `lose` should be an empty function.
 
 ```js
-assert.match(lose.toString(), /lose\s*\(\)\s*\{\s*\}/);
+assert.match(lose.toString(), /lose\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
index 477c4f7710e..f8f57306b03 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8eec45f77bc69e8775294
-title: Step 127
+title: Step 126
 challengeType: 0
-dashedName: step-127
+dashedName: step-126
 ---
 
 # --description--
 
-Inside the `dodge` function, set `text.innerText` equal to the string `You dodge the attack from the <monster>`. Replace `<monster>` with the name of the monster, using the `name` property.
+Inside the `dodge` function, set `text.innerText` equal to the string `"You dodge the attack from the <monster>"`. Replace `<monster>` with the name of the monster, using the `name` property.
 
 # --hints--
 
-You should assign the string `You dodge the attack from the` to the `text.innerText` property. Remember that spacing matters.
+You should assign the string `"You dodge the attack from the "` to the `text.innerText` property. Remember that spacing matters.
 
 ```js
 assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1/);
@@ -20,7 +20,7 @@ assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack
 You should use the concatenation operator to add the name of the monster to the end of the string. You can get this with `monsters[fighting].name`.
 
 ```js
-assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
index 06490d9093e..e32d3bd0439 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8eefe2e68b66ac563816b
-title: Step 128
+title: Step 127
 challengeType: 0
-dashedName: step-128
+dashedName: step-127
 ---
 
 # --description--
 
-In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. You can get the monster's level with the `level` property.
+In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. Remember you can get the monster's level by using `monsters[fighting].level`.
 
 Here is an example of setting `num` to `num` plus `5` * `8`: `num += 5 * 8`. Use `Math.floor()` to round the result down.
 
@@ -22,13 +22,13 @@ assert.match(defeatMonster.toString(), /gold\s*\+=/);
 You should use `Math.floor()` to round the result of the monster's level times `6.7`.
 
 ```js
-assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\))/);
 ```
 
 You should add the result of `Math.floor(monsters[fighting].level * 6.7)` to `gold`.
 
 ```js
-assert.match(defeatMonster.toString(), /gold\s*\+=\s*(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /gold\s*\+=\s*((Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)))/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
index 3301aa6246b..a23344528d5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef6a52292f6bdca4f6f8
-title: Step 129
+title: Step 128
 challengeType: 0
-dashedName: step-129
+dashedName: step-128
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /xp\s*\+=/);
 You should add the monster's level to `xp`.
 
 ```js
-assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\[fighting\]\.level/);
+assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
index 1170568e396..d573e966cac 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef8f0c76a46cd221a68c
-title: Step 130
+title: Step 129
 challengeType: 0
-dashedName: step-130
+dashedName: step-129
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
index fd123524213..4a948c96439 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8efb0e3ce826db8daf80f
-title: Step 131
+title: Step 130
 challengeType: 0
-dashedName: step-131
+dashedName: step-130
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /update/);
 You should pass `locations[4]` as the argument.
 
 ```js
-assert.match(defeatMonster.toString(), /update\(locations\[4\]\)/);
+assert.match(defeatMonster.toString(), /update\(\s*locations\s*\[\s*4\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
index db2c7c81425..76fd64bb570 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8eff21c0b0f6ebe5b8e38
-title: Step 132
+title: Step 131
 challengeType: 0
-dashedName: step-132
+dashedName: step-131
 ---
 
 # --description--
 
 Your `locations` array doesn't have a fifth element, so `locations[4]` doesn't work.
 
-Add a new object at the end of the `locations` array, following the same structure as the other objects. Set `name` to `kill monster`, set `button text` to an array with three `Go to town square` strings, set `button functions` to an array with three `goTown` variables, and set `text` to `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Add a new object at the end of the `locations` array, following the same structure as the other objects. Set `name` to `"kill monster"`, set `"button text"` to an array with three `"Go to town square"` strings, set `"button functions"` to an array with three `goTown` variables, and set `text` to `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 # --hints--
 
@@ -25,25 +25,25 @@ Your fifth `locations` value should be an object.
 assert.isObject(locations[4]);
 ```
 
-Your fifth `locations` value should have a `name` property with the value `kill monster`.
+Your fifth `locations` value should have a `name` property with the value `"kill monster"`.
 
 ```js
 assert.equal(locations[4].name, 'kill monster');
 ```
 
-Your fifth `locations` value should have a `button text` array with three `Go to town square` strings.
+Your fifth `locations` value should have a `"button text"` array with three `"Go to town square"` strings.
 
 ```js
 assert.deepEqual(locations[4]["button text"], ['Go to town square', 'Go to town square', 'Go to town square']);
 ```
 
-Your fifth `locations` value should have a `button functions` array with three `goTown` variables.
+Your fifth `locations` value should have a `"button functions"` array with three `goTown` variables.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, goTown]);
 ```
 
-Your fifth `locations` value should have a `text` property with the value `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Your fifth `locations` value should have a `text` property with the value `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams Arg! as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
index 6209dc3d35d..42320970f45 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8f06fb318666fef69f91e
-title: Step 133
+title: Step 132
 challengeType: 0
-dashedName: step-133
+dashedName: step-132
 ---
 
 # --description--
 
-The word `Arg!` should have quotes around it. Besides escaping quotes, there is another way you can include quotation marks inside a string.
+The word `"Arg!"` should have quotes around it. Besides escaping quotes, there is another way you can include quotation marks inside a string.
 
-Change the double quotes around the string `The monster screams Arg! as it dies. You gain experience points and find gold.` to single quotes `'`, then add double quotes around `Arg!`.
+Change the double quotes around the string `"The monster screams Arg! as it dies. You gain experience points and find gold."` to single quotes `'`, then add double quotes around `"Arg!"`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should use single quotes around the string.
 assert.match(code, /'The monster screams "?Arg!"? as it dies. You gain experience points and find gold.'/);
 ```
 
-You should use double quotes around `Arg!`.
+You should use double quotes around `"Arg!"`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams "Arg!" as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
index d3d163e5feb..9137e403c0b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f14fe6d1fc72454648c7
-title: Step 134
+title: Step 133
 challengeType: 0
-dashedName: step-134
+dashedName: step-133
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
index 27cfddf7384..9d984dbb5a9 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f1d5f5ddbf74c07f733b
-title: Step 135
+title: Step 134
 challengeType: 0
-dashedName: step-135
+dashedName: step-134
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(lose.toString(), /update\(/);
 Your `update` function should have `locations[5]` for the argument.
 
 ```js
-assert.match(lose.toString(), /update\(locations\[5\]\)/);
+assert.match(lose.toString(), /update\(\s*locations\s*\[\s*5\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
index 9947c835faa..a4d22989a7e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f20463b324759953edad
-title: Step 136
+title: Step 135
 challengeType: 0
-dashedName: step-136
+dashedName: step-135
 ---
 
 # --description--
@@ -45,7 +45,7 @@ Your `restart` function should set `currentWeapon` to `0`.
 assert.match(restart.toString(), /currentWeapon\s*=\s*0/);
 ```
 
-Your `restart` function should set `inventory` to an array with the string `stick`.
+Your `restart` function should set `inventory` to an array with the string `"stick"`.
 
 ```js
 assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
@@ -54,7 +54,7 @@ assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
 Your `restart` function should call the `goTown()` function.
 
 ```js
-assert.match(restart.toString(), /goTown\(\)/);
+assert.match(restart.toString(), /goTown\(\s*\)/);
 ```
 
 You should set `goldText.innerText` to the value of `gold`.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
index 35c1b321145..6e05e05b776 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f256b813a476cae51f49
-title: Step 138
+title: Step 137
 challengeType: 0
-dashedName: step-138
+dashedName: step-137
 ---
 
 # --description--
@@ -41,7 +41,7 @@ You should call the `winGame` function in your `if` block.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\)(\s*\})?/);
+assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\s*\)(\s*\})?/);
 ```
 
 You should add an `else` block.
@@ -55,7 +55,7 @@ Your `else` block should call the `defeatMonster` function.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\)(\s*\})?/);
+assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\s*\)(\s*\})?/);
 ```
 
 # --seed--
@@ -220,7 +220,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
index 095200ed56e..a43ddc6b3af 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
@@ -20,7 +20,7 @@ assert.match(code, /function\s+winGame/);
 Your `winGame` function should call the `update` function and pass in `locations[6]`.
 
 ```js
-assert.match(winGame.toString(), /update\s*\(\s*locations\[6\]\s*\)/);
+assert.match(winGame.toString(), /update\s*\(\s*locations\s*\[\s*6\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -185,7 +185,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
index b70c74ede29..f2b63a0893c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
@@ -7,7 +7,7 @@ dashedName: step-140
 
 # --description--
 
-Add another object in the `locations` array. Everything should be the same as the `lose` object, except the `name` should be `win` and the `text` should be `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Add another object in the `locations` array. Everything should be the same as the `lose` object, except the `name` should be `"win"` and the `text` should be `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 # --hints--
 
@@ -23,13 +23,13 @@ Your seventh `locations` value should be an object.
 assert.isObject(locations[6]);
 ```
 
-Your seventh `locations` value should have a `name` property with the value `win`.
+Your seventh `locations` value should have a `name` property with the value `"win"`.
 
 ```js
 assert.equal(locations[6].name, 'win');
 ```
 
-Your seventh `locations` value should have a `button text` array with three `REPLAY?` strings.
+Your seventh `locations` value should have a `button text` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[6]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
@@ -41,10 +41,10 @@ Your seventh `locations` value should have a `button functions` array with three
 assert.deepEqual(locations[6]["button functions"], [restart, restart, restart]);
 ```
 
-Your seventh `locations` value should have a `text` property with the value `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Your seventh `locations` value should have a `text` property with the value `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 ```js
-assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! 🎉');
+assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! &#x1F389;');
 ```
 
 # --seed--
@@ -210,7 +210,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 --fcc-editable-region--
 ];
@@ -228,7 +228,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
index 5ac48b2aefa..18aed8e1612 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
@@ -16,7 +16,7 @@ While your game is feature complete at this stage, there are things you can do t
 `health` 所在行的代码应该修改为 `health -= getMonsterAttackValue(monsters[fighting].level);`。
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(monsters\[fighting\]\.level\)/);
+assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)/);
 ```
 
 # --seed--
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -204,7 +204,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
index 7081d742d4a..7d075d0f362 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1d6736ba262cfa74344b
-title: 步骤 142
+title: Step 142
 challengeType: 0
 dashedName: step-142
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
index 5a7725e045d..3fba1785785 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1d9f535e102e4663e7a6
-title: 步骤 143
+title: Step 143
 challengeType: 0
 dashedName: step-143
 ---
@@ -22,13 +22,13 @@ assert.match(code, /const\s+hit/);
 你应该使用 `(level * 5) - (Math.floor(Math.random() * xp))`。
 
 ```js
-assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(Math\.random\(\)\s*\*\s*xp\))/);
+assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\))/);
 ```
 
 你应该把 `hit` 设置为 `(level * 5) - (Math.floor(Math.random() * xp))` 的值。
 
 ```js
-assert.match(code, /hit\s*=\s*\(level\s*\*\s*5\)\s*-\s*\(Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\)/);
+assert.match(code, /hit\s*=\s*\(\s*level\s*\*\s*5\s*\)\s*-\s*\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
index d403e754bd6..d9246c55658 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1e3c7c3d552fb04f0f18
-title: 步骤 144
+title: Step 144
 challengeType: 0
 dashedName: step-144
 ---
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
index d46093bbef2..161b1f02b4b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1e8ccd579330e097ce44
-title: 步骤 145
+title: Step 145
 challengeType: 0
 dashedName: step-145
 ---
@@ -188,13 +188,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -211,7 +211,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
index 605239d442f..dc5dc06f6b7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1eec891ed731db227a36
-title: 步骤 146
+title: Step 146
 challengeType: 0
 dashedName: step-146
 ---
@@ -207,13 +207,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -230,7 +230,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
index 79bf917f76f..351dab64559 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1fed3d4e873366ff3131
-title: 步骤 147
+title: Step 147
 challengeType: 0
 dashedName: step-147
 ---
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
index ae1099e78f2..8ac903940a1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa204c1e1d33348ff09944
-title: 步骤148
+title: Step 148
 challengeType: 0
 dashedName: step-148
 ---
@@ -14,7 +14,7 @@ Move your `monsterHealth` assignment into your `if` block.
 You should move your `monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1` into your `if` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1/)
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
index ec8229acffd..0f1429cf2ad 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
@@ -7,20 +7,20 @@ dashedName: step-149
 
 # --description--
 
-Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `You miss.` to the end of `text.innerText`.
+Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `" You miss."` to the end of `text.innerText`.
 
 # --hints--
 
 You should add an `else` block after your `if (isMonsterHit())` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else/)
 ```
 
-You should add the text `You miss.` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
+You should add the text `" You miss."` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
index 67dfb73b231..d416bbb7431 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
@@ -20,7 +20,7 @@ assert.match(code, /function\s+isMonsterHit/);
 Your `isMonsterHit` function should return the result of the comparison `Math.random() > .2`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2/);
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
index 1e891d78d8c..7784c2d49de 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa21971e3b743844849985
-title: 步骤 151
+title: Step 151
 challengeType: 0
 dashedName: step-151
 ---
@@ -32,7 +32,7 @@ assert.match(isMonsterHit.toString(), /\|\|\s*health\s*<\s*20/);
 Your function should return the result of the comparison `Math.random() > .2` **or** `health < 20`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
 ```
 
 # --seed--
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
index 495bec18415..fa6e46189de 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
@@ -21,7 +21,7 @@ assert.lengthOf(ifs, 5);
 Your new `if` statement should check `Math.random() <= .1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\)\s*<=\s*0?\.1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*<=\s*0?\.1\s*\)/);
 ```
 
 # --seed--
@@ -186,13 +186,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -209,7 +209,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
index 9ebf66f29ff..75e7e7fdc67 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
@@ -7,7 +7,7 @@ dashedName: step-153
 
 # --description--
 
-Use the `+=` operator to add `Your <weapon> breaks.`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
+Use the `+=` operator to add `" Your <weapon> breaks."`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
 
 # --hints--
 
@@ -21,7 +21,7 @@ assert.lengthOf(concat, 3);
 You should use the `pop` method on the `inventory` array.
 
 ```js
-assert.match(attack.toString(), /inventory\.pop\(\)/);
+assert.match(attack.toString(), /inventory\.pop\(\s*\)/);
 ```
 
 You should add `Your`, with a space before and after it, to `text.innerText`.
@@ -30,17 +30,16 @@ You should add `Your`, with a space before and after it, to `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1/);
 ```
 
-You should add the return value of `inventory.pop()` to the `Your` string.
+You should add the return value of `inventory.pop()` to the `" Your "` string.
 
 ```js
-console.log(attack.toString());
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)/);
 ```
 
-You should add `breaks.`, with a space in front of it, to the end of your string.
+You should add `" breaks."`, with a space in front of it, to the end of your string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)\s*\+\s*('|")\sbreaks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)\s*\+\s*('|")\sbreaks\.\2/);
 ```
 
 # --seed--
@@ -205,13 +204,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -228,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
index 97d5746c0e6..cb4f98370a3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
@@ -7,7 +7,13 @@ dashedName: step-154
 
 # --description--
 
-Remember that the increment operator `++` can be used to increase a variable's value by 1. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by 1.
+Remember that the increment operator `++` can be used to increase a variable's value by `1`. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by `1`. For example :
+
+```js
+let num = 10;
+num--;
+console.log(num); // Output: 9
+```
 
 Decrement the value of `currentWeapon` in your `if` statement, after you update the text.
 
@@ -187,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -210,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
index 81204537ebf..fb08209886d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
@@ -24,19 +24,19 @@ if (firstName === "Quincy" && lastName === "Larson") {
 You should not modify your existing `if` statement.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1/);
 ```
 
 You should use the logical AND operator `&&`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&/);
 ```
 
 You should use the logical AND operator to check if `inventory.length` does not equal `1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
 ```
 
 # --seed--
@@ -201,13 +201,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
index fe35aa83b6e..3320abac13c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
@@ -28,7 +28,7 @@ assert.match(easterEgg.toString(), /update\(/);
 `easterEgg` should call the `update` function with `locations[7]` as the argument.
 
 ```js
-assert.match(easterEgg.toString(), /update\(\s*locations\[7\]\s*\)/);
+assert.match(easterEgg.toString(), /update\(\s*locations\s*\[\s*7\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
index 475a1b9cbc1..bc5c75fdb1e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa252c3b1073415ba2b898
-title: 步骤 157
+title: Step 157
 challengeType: 0
 dashedName: step-157
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
index 8ff8ec6621b..c4f60b0792a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
@@ -211,13 +211,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -234,7 +234,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
index 51f9cf5cacb..5bcd8e739c0 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa25fcb5837d43b4d9873d
-title: 步骤 159
+title: Step 159
 challengeType: 0
 dashedName: step-159
 ---
 
 # --description--
 
-Add another object to your `locations` array. Set `name` to `easter egg`, set `button text` to an array with the strings `2`, `8`, and `Go to town square?`, set `button functions` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Add another object to your `locations` array. Set `name` to `"easter egg"`, set `"button text"` to an array with the strings `"2"`, `"8"`, and `"Go to town square?"`, set `"button functions"` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 # --hints--
 
@@ -23,25 +23,25 @@ Your eighth `locations` value should be an object.
 assert.isObject(locations[7]);
 ```
 
-Your eighth `locations` value should have a `name` property with the value `easter egg`.
+Your eighth `locations` value should have a `name` property with the value `"easter egg"`.
 
 ```js
 assert.equal(locations[7].name, "easter egg");
 ```
 
-Your eighth `locations` value should have a `button text` array with the strings `2`, `8`, and `Go to town square?`.
+Your eighth `locations` value should have a `"button text"` array with the strings `"2"`, `"8"`, and `"Go to town square?"`.
 
 ```js
 assert.deepEqual(locations[7]["button text"], ["2", "8", "Go to town square?"]);
 ```
 
-Your eighth `locations` value should have a `button functions` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
+Your eighth `locations` value should have a `"button functions"` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[7]["button functions"], [pickTwo, pickEight, goTown]);
 ```
 
-Your eighth `locations` value should have a `text` property with the value `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Your eighth `locations` value should have a `text` property with the value `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 ```js
 assert.equal(locations[7].text, "You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!");
@@ -209,13 +209,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
 --fcc-editable-region--
 
@@ -235,7 +235,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
index 4eb559dc555..144e384890e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
@@ -14,7 +14,7 @@ Inside `pick`, use `const` to initialize a variable named `numbers` and set it t
 Your `pick` function should initialize `numbers` to an empty array `[]`.
 
 ```js
-assert.match(pick.toString(), /numbers\s*=\s*\[\]/);
+assert.match(pick.toString(), /numbers\s*=\s*\[\s*\]/);
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
index cabbf179381..690b9c4efd5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa264d23cdaa45a20efada
-title: 步骤 161
+title: Step 161
 challengeType: 0
 dashedName: step-161
 ---
@@ -195,13 +195,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
index 1911ef32aaf..c7319b7da11 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa26cca3cd3d46c431e73b
-title: 步骤 162
+title: Step 162
 challengeType: 0
 dashedName: step-162
 ---
@@ -20,13 +20,13 @@ assert.match(pick.toString(), /numbers\.push\(/);
 You should use `Math.floor(Math.random() * 11)` to create the random number.
 
 ```js
-assert.match(pick.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)/);
+assert.match(pick.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)/);
 ```
 
 You should `push` the result of `Math.floor(Math.random() * 11)` to the end of the `numbers` array.
 
 ```js
-assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)\s*\)/);
+assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
index 6f6db396fee..50ee79091f1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
@@ -7,23 +7,23 @@ dashedName: step-163
 
 # --description--
 
-After the `while` loop, set `text.innerText` to equal `You picked <someGuess>. Here are the random numbers:`. Replace `<someGuess>` with the `guess` function parameter.
+After the `while` loop, set `text.innerText` to equal `"You picked <someGuess>. Here are the random numbers:"`. Replace `<someGuess>` with the `guess` function parameter.
 
 # --hints--
 
-You should set `text.innerText` to the string `You picked`. Remember that spacing matters.
+You should set `text.innerText` to the string `"You picked "`. Remember that spacing matters.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1/);
 ```
 
-You should use the concatenation operator to add the value of the `guess` parameter to your `You picked` string.
+You should use the concatenation operator to add the value of the `guess` parameter to your `"You picked "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess/);
 ```
 
-You should use the concatenation operator to add the string `. Here are the random numbers:` to your `"You picked " + guess` string.
+You should use the concatenation operator to add the string `". Here are the random numbers:"` to your `"You picked " + guess` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\2/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
index 5f4c6ece5c7..b5c0ff67275 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
@@ -11,7 +11,7 @@ At the end of the string, before the final quote, insert the new line escape cha
 
 # --hints--
 
-You should add the new line escape character `\n` to your `. Here are the random numbers:` string.
+You should add the new line escape character `\n` to your `". Here are the random numbers: "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\\n\2/);
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
index b1feb5c19e8..4cfce9c5908 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -214,7 +214,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
index 0030e660a57..1f2ce1ffbfa 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
@@ -11,7 +11,7 @@ dashedName: step-166
 
 The initialization expression is executed only once, before the loop starts, and is often used to define and set up the loop variable. Think of it like declaring a counter to use in your loop.
 
-Many `for` loops use `i` as the counter and start from 0, so change `let x = 1;` to `let i = 0;`.
+Many `for` loops use `i` as the counter and start from `0`, so change `let x = 1;` to `let i = 0;`.
 
 # --hints--
 
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
index b6b9c8a6121..82b517528b7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
@@ -9,7 +9,7 @@ dashedName: step-167
 
 The second statement in a `for` loop, the condition statement, is evaluated at the beginning of every loop iteration. The loop will continue as long as the condition evaluates to be true.
 
-We want the loop to run 10 times, so change `x < 5` to `i < 10`.
+We want the loop to run `10` times, so change `x < 5` to `i < 10`.
 
 # --hints--
 
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
index d9ec16a15e7..d87e5e62858 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
index d7f2dcd44d4..71875c1a0ea 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
@@ -20,20 +20,19 @@ assert.match(pick.toString(), /text\.innerText\s*\+=/);
 You should use bracket notation to access `numbers[i]`.
 
 ```js
-assert.match(pick.toString(), /numbers\[i\]/);
+assert.match(pick.toString(), /numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add `numbers[i]` to your `text.innerText` value.
 
 ```js
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add a new-line character after the `numbers[i]` value. Remember that you can do this with `\n`.
 
 ```js
-console.log(pick.toString());
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]\s*\+\s*('|")\\n\1/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]\s*\+\s*('|")\\n\1/);
 ```
 
 # --seed--
@@ -198,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
index 04c6da995f6..5d2de454974 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
@@ -198,13 +198,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
index 8c027fab766..659e9a1e4b1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
@@ -7,11 +7,11 @@ dashedName: step-171
 
 # --description--
 
-Inside the `if` statement, add the string `Right! You win 20 gold!` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
+Inside the `if` statement, add the string `"Right! You win 20 gold!"` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
 
 # --hints--
 
-You should use compound assignment to add the string `Right! You win 20 gold!` to the end of `text.innerText`.
+You should use compound assignment to add the string `"Right! You win 20 gold!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Right! You win 20 gold!\1/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
index 17dfcd7eeeb..b0868a55bf0 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa29d8f8f88152c91350ca
-title: 步骤 172
+title: Step 172
 challengeType: 0
 dashedName: step-172
 ---
 
 # --description--
 
-Now add an `else` statement. Inside, add `Wrong! You lose 10 health!` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
+Now add an `else` statement. Inside, add `"Wrong! You lose 10 health!"` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should add an `else` block.
 assert.match(pick.toString(), /else\s*\{/);
 ```
 
-Your `else` block should use compound assignment to add `Wrong! You lose 10 health!` to the end of `text.innerText`.
+Your `else` block should use compound assignment to add `"Wrong! You lose 10 health!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Wrong! You lose 10 health!\1/);
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -226,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
index 5a9af82631f..650fe59ddd1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
@@ -27,7 +27,7 @@ assert.match(pick.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 Your `if` statement should call the `lose` function.
 
 ```js
-assert.match(pick.toString(), /lose\(\)/);
+assert.match(pick.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
@@ -192,13 +192,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -221,7 +221,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
index 077c023ac13..ebf70ca3d06 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
@@ -1,19 +1,19 @@
 ---
 id: 62aa2ba9cd881355a6f0a5a8
-title: 步骤 174
+title: Step 174
 challengeType: 0
 dashedName: step-174
 ---
 
 # --description--
 
-Looking at your `kill monster` object, `button functions` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `button text`.
+Looking at your `"kill monster"` object, `"button functions"` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `"button text"`.
 
 With this, your RPG game is complete! You can now play around - can you defeat the dragon?
 
 # --hints--
 
-You should update your fifth `locations` object to have a `button functions` property of `[goTown, goTown, easterEgg]`.
+You should update your fifth `locations` object to have a `"button functions"` property of `[goTown, goTown, easterEgg]`.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, easterEgg]);
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
@@ -557,13 +557,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
index 710dd2e3c95..f3d11a95837 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
@@ -1,13 +1,13 @@
 ---
 id: 62ba17beef16c563069a65d8
-title: Step 137
+title: Step 136
 challengeType: 0
-dashedName: step-137
+dashedName: step-136
 ---
 
 # --description--
 
-In the `locations` array, add another object at the end. Set the `name` property to `lose`, set `button text` to an array with three `REPLAY?` strings, set `button functions` to an array with three `restart` variables, and set `text` to `You die. ☠️`. You can copy that text to use the emote.
+In the `locations` array, add another object at the end. Set the `name` property to `"lose"`, set `"button text"` to an array with three `"REPLAY?"` strings, set `"button functions"` to an array with three `restart` variables, and set `text` to `"You die. &#x2620;"`.
 
 # --hints--
 
@@ -23,28 +23,28 @@ Your sixth `locations` value should be an object.
 assert.isObject(locations[5]);
 ```
 
-Your sixth `locations` value should have a `name` property with the value `lose`.
+Your sixth `locations` value should have a `name` property with the value `"lose"`.
 
 ```js
 assert.equal(locations[5].name, 'lose');
 ```
 
-Your sixth `locations` value should have a `button text` array with three `REPLAY?` strings.
+Your sixth `locations` value should have a `"button text"` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[5]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
 ```
 
-Your sixth `locations` value should have a `button functions` array with three `restart` variables.
+Your sixth `locations` value should have a `"button functions"` array with three `restart` variables.
 
 ```js
 assert.deepEqual(locations[5]["button functions"], [restart, restart, restart]);
 ```
 
-Your sixth `locations` value should have a `text` property with the value `You die. ☠️`.
+Your sixth `locations` value should have a `text` property with the value `"You die. &#x2620;"`.
 
 ```js
-assert.equal(locations[5].text, 'You die. ☠️');
+assert.equal(locations[5].text, 'You die. &#x2620;');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
index 28926e31354..4865cad0681 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
@@ -17,7 +17,7 @@ You should declare a `button2` variable with `const`.
 assert.match(code, /const\s+button2/);
 ```
 
-Your `button2` variable should have the value of your `#button2` element.
+Your `button2` variable should have the value of your `"#button2"` element.
 
 ```js
 assert.deepEqual(button2, document.querySelector('#button2'));
@@ -29,7 +29,7 @@ You should declare a `button3` variable with `const`.
 assert.match(code, /const\s+button3/);
 ```
 
-Your `button3` variable should have the value of your `#button3` element.
+Your `button3` variable should have the value of your `"#button3"` element.
 
 ```js
 assert.deepEqual(button3, document.querySelector('#button3'));
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
new file mode 100644
index 00000000000..432c7be3420
--- /dev/null
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
@@ -0,0 +1,356 @@
+---
+id: 65b2f6acce65b7a69751a090
+title: Step 138
+challengeType: 0
+dashedName: step-138
+---
+
+# --description--
+
+In order for the `&#x2620;` emoticon text to properly display on the page, you will need to use the <dfn>innerHTML</dfn> property.
+
+The `innerHTML` property allows you to access or modify the content inside an HTML element using JavaScript.
+
+Here is an example of updating the content for this paragraph element using the `innerHTML`  property.
+
+```html
+<p id="demo">This is a paragraph.</p>
+```
+
+```js
+document.querySelector("#demo").innerHTML = "Hello, innerHTML!";
+```
+
+In the `update` function, change `text.innerText` to `text.innerHTML`.
+
+# --hints--
+
+
+You should use dot notation to access the `innerHTML` property of `text`.
+
+```js
+assert.match(code, /text\.innerHTML/);
+```
+
+You should not use `let` or `const` to access the `innerHTML` property of `text`.
+
+```js
+assert.notMatch(code, /(let|const)\s+text.innerHTML/);
+```
+
+You should set `innerHTML` equal to the `text` property of `location`.
+
+```js
+assert.match(code, /text\.innerHTML\s*=\s*location\.text/);
+```
+
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <link rel="stylesheet" href="./styles.css">
+    <title>RPG - Dragon Repeller</title>
+  </head>
+  <body>
+    <div id="game">
+      <div id="stats">
+        <span class="stat">XP: <strong><span id="xpText">0</span></strong></span>
+        <span class="stat">Health: <strong><span id="healthText">100</span></strong></span>
+        <span class="stat">Gold: <strong><span id="goldText">50</span></strong></span>
+      </div>
+      <div id="controls">
+        <button id="button1">Go to store</button>
+        <button id="button2">Go to cave</button>
+        <button id="button3">Fight dragon</button>
+      </div>
+      <div id="monsterStats">
+        <span class="stat">Monster Name: <strong><span id="monsterName"></span></strong></span>
+        <span class="stat">Health: <strong><span id="monsterHealth"></span></strong></span>
+      </div>
+      <div id="text">
+        Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.
+      </div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+body {
+  background-color: #0a0a23;
+}
+
+#text {
+  background-color: #0a0a23;
+  color: #ffffff;
+  padding: 10px;
+}
+
+#game {
+  max-width: 500px;
+  max-height: 400px;
+  background-color: #ffffff;
+  color: #ffffff;
+  margin: 30px auto 0px;
+  padding: 10px;
+}
+
+#controls,
+#stats {
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #0a0a23;
+}
+
+#monsterStats {
+  display: none;
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #ffffff;
+  background-color: #c70d0d;
+}
+
+.stat {
+  padding-right: 10px;
+}
+
+button {
+  cursor: pointer;
+  color: #0a0a23;
+  background-color: #feac32;
+  background-image: linear-gradient(#fecc4c, #ffac33);
+  border: 3px solid #feac32;
+}
+```
+
+```js
+let xp = 0;
+let health = 100;
+let gold = 50;
+let currentWeapon = 0;
+let fighting;
+let monsterHealth;
+let inventory = ["stick"];
+
+const button1 = document.querySelector('#button1');
+const button2 = document.querySelector("#button2");
+const button3 = document.querySelector("#button3");
+const text = document.querySelector("#text");
+const xpText = document.querySelector("#xpText");
+const healthText = document.querySelector("#healthText");
+const goldText = document.querySelector("#goldText");
+const monsterStats = document.querySelector("#monsterStats");
+const monsterName = document.querySelector("#monsterName");
+const monsterHealthText = document.querySelector("#monsterHealth");
+const weapons = [
+  { name: 'stick', power: 5 },
+  { name: 'dagger', power: 30 },
+  { name: 'claw hammer', power: 50 },
+  { name: 'sword', power: 100 }
+];
+const monsters = [
+  {
+    name: "slime",
+    level: 2,
+    health: 15
+  },
+  {
+    name: "fanged beast",
+    level: 8,
+    health: 60
+  },
+  {
+    name: "dragon",
+    level: 20,
+    health: 300
+  }
+]
+const locations = [
+  {
+    name: "town square",
+    "button text": ["Go to store", "Go to cave", "Fight dragon"],
+    "button functions": [goStore, goCave, fightDragon],
+    text: "You are in the town square. You see a sign that says \"Store\"."
+  },
+  {
+    name: "store",
+    "button text": ["Buy 10 health (10 gold)", "Buy weapon (30 gold)", "Go to town square"],
+    "button functions": [buyHealth, buyWeapon, goTown],
+    text: "You enter the store."
+  },
+  {
+    name: "cave",
+    "button text": ["Fight slime", "Fight fanged beast", "Go to town square"],
+    "button functions": [fightSlime, fightBeast, goTown],
+    text: "You enter the cave. You see some monsters."
+  },
+  {
+    name: "fight",
+    "button text": ["Attack", "Dodge", "Run"],
+    "button functions": [attack, dodge, goTown],
+    text: "You are fighting a monster."
+  },
+  {
+    name: "kill monster",
+    "button text": ["Go to town square", "Go to town square", "Go to town square"],
+    "button functions": [goTown, goTown, goTown],
+    text: 'The monster screams "Arg!" as it dies. You gain experience points and find gold.'
+  },
+  {
+    name: "lose",
+    "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
+    "button functions": [restart, restart, restart],
+    text: "You die. &#x2620;"
+  }
+
+];
+
+// initialize buttons
+button1.onclick = goStore;
+button2.onclick = goCave;
+button3.onclick = fightDragon;
+
+function update(location) {
+  --fcc-editable-region--
+  monsterStats.style.display = "none";
+  button1.innerText = location["button text"][0];
+  button2.innerText = location["button text"][1];
+  button3.innerText = location["button text"][2];
+  button1.onclick = location["button functions"][0];
+  button2.onclick = location["button functions"][1];
+  button3.onclick = location["button functions"][2];
+  text.innerText = location.text;
+  --fcc-editable-region--
+}
+
+function goTown() {
+  update(locations[0]);
+}
+
+function goStore() {
+  update(locations[1]);
+}
+
+function goCave() {
+  update(locations[2]);
+}
+
+function buyHealth() {
+  if (gold >= 10) {
+    gold -= 10;
+    health += 10;
+    goldText.innerText = gold;
+    healthText.innerText = health;
+  } else {
+    text.innerText = "You do not have enough gold to buy health.";
+  }
+}
+
+function buyWeapon() {
+  if (currentWeapon < weapons.length - 1) {
+    if (gold >= 30) {
+      gold -= 30;
+      currentWeapon++;
+      goldText.innerText = gold;
+      let newWeapon = weapons[currentWeapon].name;
+      text.innerText = "You now have a " + newWeapon + ".";
+      inventory.push(newWeapon);
+      text.innerText += " In your inventory you have: " + inventory;
+    } else {
+      text.innerText = "You do not have enough gold to buy a weapon.";
+    }
+  } else {
+    text.innerText = "You already have the most powerful weapon!";
+    button2.innerText = "Sell weapon for 15 gold";
+    button2.onclick = sellWeapon;
+  }
+}
+
+function sellWeapon() {
+  if (inventory.length > 1) {
+    gold += 15;
+    goldText.innerText = gold;
+    let currentWeapon = inventory.shift();
+    text.innerText = "You sold a " + currentWeapon + ".";
+    text.innerText += " In your inventory you have: " + inventory;
+  } else {
+    text.innerText = "Don't sell your only weapon!";
+  }
+}
+
+function fightSlime() {
+  fighting = 0;
+  goFight();
+}
+
+function fightBeast() {
+  fighting = 1;
+  goFight();
+}
+
+function fightDragon() {
+  fighting = 2;
+  goFight();
+}
+
+function goFight() {
+  update(locations[3]);
+  monsterHealth = monsters[fighting].health;
+  monsterStats.style.display = "block";
+  monsterName.innerText = monsters[fighting].name;
+  monsterHealthText.innerText = monsterHealth;
+}
+
+function attack() {
+  text.innerText = "The " + monsters[fighting].name + " attacks.";
+  text.innerText += " You attack it with your " + weapons[currentWeapon].name + ".";
+  health -= monsters[fighting].level;
+  monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1;
+  healthText.innerText = health;
+  monsterHealthText.innerText = monsterHealth;
+   if (health <= 0) {
+    lose();
+  } else if (monsterHealth <= 0) {
+    if (fighting === 2) {
+      winGame();
+    } else {
+      defeatMonster();
+    }
+  }
+}
+
+function dodge() {
+  text.innerText = "You dodge the attack from the " + monsters[fighting].name;
+}
+
+function defeatMonster() {
+  gold += Math.floor(monsters[fighting].level * 6.7);
+  xp += monsters[fighting].level;
+  goldText.innerText = gold;
+  xpText.innerText = xp;
+  update(locations[4]);
+}
+
+function lose() {
+  update(locations[5]);
+}
+
+function restart() {
+  xp = 0;
+  health = 100;
+  gold = 50;
+  currentWeapon = 0;
+  inventory = ["stick"];
+  goldText.innerText = gold;
+  healthText.innerText = health;
+  xpText.innerText = xp;
+  goTown();
+}
+```
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
index 5ff7a9dd907..bb00af432bc 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
@@ -22,21 +22,21 @@ You should use bracket notation to access the property of `totalCountPerProduct`
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 You should use the assignment operator to update the value of the property of `totalCountPerProduct` that corresponds to `dessert.id`.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=/);
 ```
 
 You should update the value of `totalCountPerProduct` to be the current value plus one.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\+\s*1/);
 ```
 
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
index 973a868a3af..091b5294482 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
@@ -17,28 +17,28 @@ You should wrap your right-hand `totalCountPerProduct[dessert.id]` in parenthese
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 You should use the `||` operator.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*/);
 ```
 
 You should use `0` as your fallback value.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
 ```
 
 You should still add `1` to the value.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
index e9461816258..8a607d08595 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
@@ -29,7 +29,7 @@ You should assign the value of `totalCountPerProduct[product.id]` to `currentPro
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\[product\.id\]/);
+assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\s*\[\s*product\.id\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
index 7ebfd93ae09..85b226bbfed 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
@@ -32,7 +32,7 @@ assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*
 You should add an empty callback function to the event listener. Remember to give it an `event` parameter.
 
 ```js
-assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*\s*\}\s*\)/);
+assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*;?\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
index 89744b1e268..7d76957ce74 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
@@ -53,7 +53,7 @@ Your `reduce` call should have an initial value of `0`.
 
 ```js
 const afterCalculateTotal = code.split('calculateTotal')[1];
-assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(total,\s*item\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
+assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(\s*total,\s*item\s*\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
index 691c014d5b1..77f92cfc50c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
@@ -37,7 +37,6 @@ assert.match(afterCalculateTaxes, /amount\s*\*\s*\(\s*this\s*\.\s*taxRate\s*\/\s
 Your `calculateTaxes` method should return the value of the `taxRate` (divided by 100, to convert it to a percent) multiplied by the `amount` parameter.
 
 ```js
-console.log(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 assert.equal(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 ```
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
index 7362fc1acb0..28139d67214 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
@@ -19,37 +19,37 @@ Start by accessing the `#playlist-songs`, `#play`, and `#pause` elements with th
 You should use `document.getElementById()` to get the `#playlist-songs` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should assign the `#playlist-songs` element to the variable `playlistSongs`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#play` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should assign the `#play` element to the variable `playButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#pause` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 You should assign the `#pause` element to the variable `pauseButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
index 20dc94bf3a5..1cea7e81a70 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
@@ -16,37 +16,37 @@ Assign them to variables named `nextButton`, `previousButton`, and `shuffleButto
 You should use `document.getElementById()` to get the `#next` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should assign the `#next` element to the variable `nextButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#previous` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should assign the `#previous` element to the variable `previousButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#shuffle` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 You should assign the `#shuffle` element to the variable `shuffleButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
index defcbda3452..18b6d436532 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
@@ -18,13 +18,13 @@ Use `const` to create a variable named `audio` and set it equal to `new Audio()`
 You should use the `new` keyword to create an instance of the `Audio` object.
 
 ```js
-assert.match(code, /new\s+Audio\(\);?/)
+assert.match(code, /new\s+Audio\(\s*\);?/)
 ```
 
 You should assign the `Audio` object to a constant named `audio`.
 
 ```js
-assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\);?/)
+assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
index 7b64aaee104..c860d4f067c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
@@ -34,7 +34,7 @@ assert.match(code, /userData\?\.songs\.find\(/)
 Your `find` method should have `song` as the parameter of its arrow function callback.
 
 ```js
-assert.match(code, /userData\?\.songs\.find\(\(?song\)?/)
+assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 Your `find` method should use strict equality to check if `song.id` is equal to `id`.
@@ -46,7 +46,7 @@ assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(so
 Your `find` method should be assigned to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\);?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
index bf9d8bb5e1a..93a9efd6c5a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
@@ -13,22 +13,22 @@ Also, set the `audio.title` property equal to `song.title`. This tells the audio
 
 # --hints--
 
-You should not modify the exist `playSong` function and its content.
+You should not modify the existing `playSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?/)
 ```
 
 You should set `audio.src` to `song.src`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?/)
 ```
 
 You should set `audio.title` to `song.title`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
index b6392ab67e2..604452eefb3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
@@ -17,13 +17,13 @@ Add an `if` statement to check whether the `userData?.currentSong` is `null` or
 You should create an `if` statement with the condition `userData?.currentSong === null || userData?.currentSong.id !== song.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*/)
 ```
 
 You should set `audio.currentTime` to `0` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
index 4a447677f5c..00ef22cf209 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
@@ -11,9 +11,11 @@ You need to update the current song being played as well as the appearance of th
 
 Start by accessing the `userData` object and its `currentSong` property. Set its value equal to the `song` variable.
 
+*Note*: You should not use the optional chaining operator `?.` in this step because `userData.currentSong` will not be `null` or `undefined` at this point.
+
 # --hints--
 
-You should set `userData.currentSong` to `song`.
+You should assign `song` to `userData.currentSong`.
 
 ```js
 assert.match(code, /userData\.currentSong\s*=\s*song;?/)
@@ -614,7 +616,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   --fcc-editable-region--
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
index 5a0090bdfb1..c1fba0bd879 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
@@ -7,9 +7,9 @@ dashedName: step-33
 
 # --description--
 
-You need to hook up the `playSong` function to a `click` event listener so the songs will start playing when the play button is clicked.
+In previous steps you built out the functionality for playing a song. Now you need to add the functionality to the play button so that it will play the current song when it is clicked on.
 
-Add a click event listener to the `playButton` element, then use arrow syntax to pass in a callback with an empty pair of curly braces.
+Use the `addEventListener()` method and pass in a `click` event for the first argument and an empty callback function with arrow syntax for the second argument, e.g., `() => {}`.
 
 # --hints--
 
@@ -22,13 +22,13 @@ assert.match(code, /playButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback into your event listener. Don't forget you also need an empty pair of curly braces.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
index 7f6097ea8a4..6dfb306f709 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+songsHTML/);
 You should assign `array.map()` to your `songsHTML`.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\)/);
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
index 18a46514074..6c4aae2e475 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
@@ -32,7 +32,7 @@ assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\
 You should interpolate `song.title` as the content of your `span` element.
 
 ```js
-assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\$\{song\.title\}\s*<\/span>\s*<\/button>/)
+assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\s*\$\{\s*song\.title\s*\}\s*<\/span>\s*<\/button>/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
index 1e9d4110603..250d38aa699 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
@@ -24,7 +24,7 @@ assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*/)
 Your button element should have an `aria-label` attribute with the value `Delete ${song.title}` as its second attribute and value.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2\s*>/)
 ```
 
 You should paste in the provided `svg` as the content of your `button` element.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
index 63afccd43b3..3464ba5b6b8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
@@ -24,7 +24,7 @@ Chain the `join()` method to your `map()` method and pass in an empty string for
 You should add `join("")` to the existing code.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\)\s*\.join\(('|")\3\);?/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\s*\)\s*\.join\(\s*('|")\3\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
index 58cb6fa2244..5ed4b6a356f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
@@ -35,7 +35,7 @@ Call the `renderSongs` function with the `songs` property of `userData`. This wi
 You should call your `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /renderSongs\(userData\?\.songs\)/)
+assert.match(code, /renderSongs\(\s*userData\?\.songs\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
index f2a969ece70..cad16e16266 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
@@ -9,20 +9,20 @@ dashedName: step-34
 
 Within the arrow function of the event listener, add an `if` to check if `userData?.currentSong` is `null`.
 
-Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData.songs` array. This will ensure the first song in the playlist is played first.
+Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData?.songs` array. This will ensure the first song in the playlist is played first.
 
 # --hints--
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
index fc14b2dcc19..c6af1d21b82 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
@@ -16,20 +16,20 @@ This ensures that the currently playing song will continue to play when the play
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` block to your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.currentSong.id` in the `else` block of your `if` statement.
 
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*playSong\(userData\?\.currentSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*playSong\(\s*userData\?\.currentSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -627,7 +627,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
index 78efc99a153..a561e00f622 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
@@ -28,13 +28,13 @@ assert.isFunction(pauseSong)
 Your `pauseSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `pauseSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
index f74f533dc43..4c56f9651ee 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
@@ -9,15 +9,17 @@ dashedName: step-38
 
 To store the current time of the song when it is paused, set the `songCurrentTime` of the `userData` object to the `currentTime` of the `audio` variable.
 
+*Note*: You should not use optional chaining for this step because `userData.songCurrentTime` will not be `null` or `undefined` at this point.
+
 # --hints--
 
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
-You should set `userData.songCurrentTime` to `audio.currentTime`.
+You should assign `audio.currentTime` to `userData.songCurrentTime`.
 
 ```js
 assert.match(code, /userData\.songCurrentTime\s*=\s*audio\.currentTime;?/)
@@ -618,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
index d3e6f164708..bf6bf57aecd 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
@@ -16,19 +16,19 @@ To finally pause the song, use the `pause()` method on the `audio` variable. `pa
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `classList` property and the `remove()` method to remove the class `playing` from the `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.remove\(('|")playing\1\);?/)
+assert.match(code, /playButton\.classList\.remove\(\s*('|")playing\1\s*\);?/)
 ```
 
 You should use the `pause()` method on your `audio` variable.
 
 ```js
-assert.match(code, /audio\.pause\(\)/)
+assert.match(code, /audio\.pause\(\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
index 15a0e75b97f..818638e7a7b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
@@ -22,13 +22,13 @@ assert.match(code, /pauseButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `pauseSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1,\s*pauseSong\)/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1,\s*pauseSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
index a6ea0b127bb..90a45887163 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
@@ -16,13 +16,13 @@ To finally play the song, use the `play()` method on the `audio` variable. `play
 You should use the `classList` property and the `add` method to add the class `playing` to `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.add\(("|')playing\1\);?/)
+assert.match(code, /playButton\.classList\.add\(\s*("|')playing\1\s*\);?/)
 ```
 
 You should use the `play()` method on the `audio` variable.
 
 ```js
-assert.match(code, /audio\.play\(\);?/)
+assert.match(code, /audio\.play\(\s*\);?/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
 
   userData.currentSong = song;
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
index 0835ebdd25f..036ea276c7e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
@@ -28,13 +28,13 @@ assert.isFunction(playNextSong)
 Your `playNextSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playNextSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
index a89109e15eb..3ea46900418 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
@@ -9,30 +9,30 @@ dashedName: step-44
 
 Inside the `playNextSong` function, create an `if` statement to check if the `currentSong` of `userData` is strictly equal to `null`. This will check if there's no current song playing in the `userData` object.
 
-If the condition is true, call the `playSong` function with the `id` of the first song in the `userData.songs` array as an argument.
+If the condition is true, call the `playSong` function with the `id` of the first song in the `userData?.songs` array as an argument.
 
 # --hints--
 
 You should not modify the existing `playNextSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside the `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
index ceef927c5c2..8694c16a282 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
@@ -14,25 +14,25 @@ Add an `else` block to the `if` statement. Inside the `else` block, call the `ge
 You should not modify the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` to the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 You should set the `currentSongIndex` constant to `getCurrentSongIndex()` inside the `else` block.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*\}/)
 ```
 
 
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -678,7 +678,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
index 47db1b2a7a3..4efae9588d4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
@@ -18,25 +18,25 @@ Lastly, call the `playSong` function and pass in `nextSong.id` as the argument.
 You should not modify the existing `if` statement, its `else` block, and content.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex + 1]` to a `nextSong` constant.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `nextSong.id`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*playSong\(nextSong\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*playSong\(\s*nextSong\.id\s*\);?\s*\}/)
 ```
 
 
@@ -635,7 +635,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
index 3a518c35cbc..1dd61712fec 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
@@ -22,13 +22,13 @@ assert.match(code, /nextButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playNextSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1,\s*playNextSong\)/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1,\s*playNextSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -675,7 +675,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
index cb4fc6ed95c..d5a0a5594af 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
@@ -26,13 +26,13 @@ assert.isFunction(playPreviousSong)
 Your `playPreviousSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playPreviousSong` function should be empty.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
index 09aed3f259c..0adcaa740d3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
@@ -16,31 +16,31 @@ Inside the `else` block, create a constant named `currentSongIndex` and assign i
 You should not alter the existing `playPreviousSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should have an `if` statement with the condition `userData?.currentSong === null` inside your `playPreviousSong` function.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*/)
 ```
 
 You should have `return` inside the block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
 ```
 
 You should call `getCurrentSongIndex` and assign it to `currentSongIndex` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -695,7 +695,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
index 1dbcbb68dec..9bba4ee8641 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
@@ -14,19 +14,19 @@ To get the previous song, subtract `1` from the `currentSongIndex` of `userData?
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex - 1]` to a `previousSong` constant.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `previousSong.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*playSong\(previousSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*playSong\(\s*previousSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
index 419b9c77028..545329bd39b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
@@ -20,13 +20,13 @@ assert.match(code, /previousButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playPreviousSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1,\s*playPreviousSong\)/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1,\s*playPreviousSong\s*\)/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
index 03ef9faa9ca..a96edb4100b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
@@ -28,19 +28,19 @@ assert.isFunction(highlightCurrentSong)
 Your `highlightCurrentSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*/)
 ```
 
 You should create a `playlistSongElements` constant inside your `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
 ```
 
 You should use the `querySelectorAll()` method to select the `.playlist-song` element and assign it to the `playlistSongElements` constant.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*\};?/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
index e7735e4a081..8fa3d17fa30 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
@@ -22,7 +22,7 @@ assert.isFunction(getCurrentSongIndex);
 Your `getCurrentSongIndex` function should use arrow syntax.
 
 ```js
-assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\)\s*=>\s*{\s*}\s*/);
+assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*/);
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
index 97dd491f4c7..675ec0d2504 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
@@ -16,7 +16,7 @@ Use `getElementById()` to get the `id` of the currently playing song, then use t
 You should not modify the existing `highlightCurrentSong` function and its content.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*/)
 ```
 
 You should use `document.getElementById()` and pass in `` `song-${userData?.currentSong?.id}` ``.
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -692,7 +692,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
index f3aa314ba2e..cc84846ea99 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
@@ -33,13 +33,13 @@ assert.match(code, /playlistSongElements\.forEach\(/)
 Your `forEach()` method should have a `songEl` parameter and use arrow syntax.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*/)
 ```
 
 Your `forEach` should have an empty pair of curly braces.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -637,7 +637,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
index 77ab9c8a657..9bf6726f11f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
@@ -16,19 +16,19 @@ Create an `if` statement with the condition `songToHighlight`. For the statement
 You should create an `if` statement with the condition `songToHighlight`.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*/)
 ```
 
 You should use the `setAttribute()` method on `songToHighlight` inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(/)
 ```
 
 You should pass in `"aria-current"` and `"true"` as the first and second argument of your `setAttribute` method.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\)\s*;?\s*\}?/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\s*\)\s*;?\s*\}?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
index 04fe7a5a365..022f72f88a8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
@@ -16,7 +16,7 @@ After that, play around with the control buttons to see how the `highlightCurren
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /highlightCurrentSong\(\)/)
+assert.match(code, /highlightCurrentSong\(\s*\)/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -688,7 +688,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
index 63393a4ebe2..d8afad42b7c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
@@ -26,13 +26,13 @@ assert.isFunction(setPlayerDisplay)
 Your `setPlayerDisplay` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayerDisplay` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
index bd1f0233b14..26ecb848a6d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
@@ -16,31 +16,31 @@ Access the `#player-song-title` and `#player-song-artist` elements with the `get
 You should not modify the existing `setPlayerDisplay` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use `document.getElementById()` to get the `#player-song-title` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should assign the `#player-song-title` element to the variable `playingSong`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should use `document.getElementById()` to get the `#player-song-artist` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 You should assign the `#player-song-artist` element to the variable `songArtist`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -716,7 +716,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
index 0f0ddf3e028..b8cf4152d8b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -710,7 +710,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
index d94a00e7394..8924bc45e66 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -725,7 +725,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
index 96c26c92d3f..b9c1fa7dc66 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
@@ -16,7 +16,7 @@ Now you should see the song title and the artist show up in the display.
 You should call the `setPlayerDisplay` function inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayerDisplay\(\);?/)
+assert.match(code, /setPlayerDisplay\(\s*\);?/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
index 0add8302bed..e7b4846ca3f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
@@ -28,13 +28,13 @@ assert.isFunction(setPlayButtonAccessibleText)
 Your `setPlayButtonAccessibleText` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayButtonAccessibleText` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -719,7 +719,7 @@ const renderSongs = (array) => {
 
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
index ff1c0548cc7..73d8bd0c0da 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
@@ -16,19 +16,19 @@ Don't forget to use optional chaining.
 You should not modify the existing `setPlayButtonAccessibleText` and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should access `userData?.currentSong` or `userData?.songs[0]`.
 
 ```js
-assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 You should assign `userData?.currentSong || userData?.songs[0]` to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -715,7 +715,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
index 270ad67d025..8c12d663080 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
@@ -16,7 +16,7 @@ Don't forget you need template interpolation here, so you need to use backticks.
 You should not modify the existing `setPlayButtonAccessibleText` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `setAttribute()` method on `playButton`.
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
index 653c92cc68b..519d8416499 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
@@ -14,7 +14,7 @@ Now, call the `setPlayButtonAccessibleText` function inside the `playSong` funct
 You should call the `setPlayButtonAccessibleText` inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayButtonAccessibleText\(\);?/)
+assert.match(code, /setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -707,7 +707,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
index 2acfa35a211..6ece31a1be0 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
@@ -28,13 +28,13 @@ assert.isFunction(shuffle)
 Your `shuffle` function should use an arrow syntax and should not take a parameter.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `shuffle` function  should be empty.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -729,7 +729,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
index d501842c3a2..b4a1df8f689 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
@@ -24,7 +24,7 @@ Use the `sort()` method on the `userData?.songs` array. Pass a callback to the m
 You should not modify the existing `shuffle` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*{\s*[\s\S]*?\};?/);
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*{\s*[\s\S]*?\};?/);
 ```
 
 You should use the `sort()` method on `userData?.songs`.
@@ -42,7 +42,7 @@ assert.match(code, /userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*/)
 The callback of your `sort()` method should return `Math.random() - 0.5`.
 
 ```js
-assert.match(code, /userData\?.songs\.sort\s*\(\(\)\s*=>(\s*{\s*return\s+Math\.random\(\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\)\s*-\s*0\.5\s*)\);?/);
+assert.match(code, /userData\?.songs\.sort\s*\(\s*\(\s*\)\s*=>(\s*{\s*return\s+Math\.random\(\s*\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\s*\)\s*-\s*0\.5\s*)\s*\);?/);
 ```
 
 # --seed--
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -739,7 +739,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
index 45aaf9b7529..323d5721daa 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
@@ -11,6 +11,8 @@ When the shuffle button is pressed, you want to set the `currentSong` to nothing
 
 Set `userData.currentSong` to `null` and `userData.songCurrentTime` to `0`.
 
+*Note*: You should not use optional chaining for this step because you are explicitly setting the `currentSong` and `songCurrentTime` properties to be `null` and `0` respectively.
+
 # --hints--
 
 You should set `userData.currentSong` to `null`.
@@ -620,7 +622,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -720,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
index 1f74addfa5c..5fee6b4f57c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
@@ -16,31 +16,31 @@ Call the `renderSongs` function and pass in `userData?.songs` as an argument. Al
 You should not modify the existing `shuffle` function and its content.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -741,7 +741,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
index ccb1a8926d7..d408f016e7c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
@@ -22,13 +22,13 @@ assert.match(code, /shuffleButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 You should pass in `shuffle` as the second value of your `click` event listener.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1,\s*shuffle\);?/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1,\s*shuffle\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
index f168325ec63..37e81afe7cd 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -746,7 +746,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
index f5a57100c0f..b6f693bd0fd 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
@@ -7,7 +7,7 @@ dashedName: step-73
 
 # --description--
 
-Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData.songs` array.
+Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData?.songs` array.
 
 The `filter` method keeps only the elements of an array that satisfy the callback function passed to it:
 
@@ -20,12 +20,14 @@ console.log(numsGreaterThanThree) // Output: [10, 8, 4, 5]
 
 Use the `filter()` method on `userData?.songs`. Pass in `song` as the parameter of the arrow function callback and use implicit return to check if `song.id` is strictly not equal to `id`. Assign all of that to the `userData.songs`.
 
+*Note*: You should not use optional chaining when you assign the result of  `userData?.songs.filter` to `userData.songs` because the `allSongs` array will not be `undefined` or `null` at that point.
+
 # --hints--
 
 You should not modify the existing `deleteSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should use the `filter()` method on `userData?.songs`.
@@ -647,7 +649,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -757,7 +759,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
index 7648632592b..4dd3f1e12ca 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
@@ -18,25 +18,25 @@ After that, call the `highlightCurrentSong` function to highlight the current so
 You should not modify the existing `deleteSong` function and its content.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -634,7 +634,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -745,7 +745,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
index ae1a676839e..f4e7cc8192d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
@@ -16,7 +16,7 @@ Use an `if` statement to check if the `userData?.currentSong?.id` is equal to th
 You should create an empty `if` statement with the condition `userData?.currentSong?.id === id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
index e3fb4c5ff85..62a946fb58c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
@@ -16,31 +16,31 @@ After that, call the `pauseSong()` function to stop the playback and the `setPla
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.currentSong` to `null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.songCurrentTime` to `0`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*.*\s*\}/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -755,7 +755,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
index e953e9d1c18..a9f5d19abc1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
@@ -9,14 +9,14 @@ dashedName: step-78
 
 Next, you need to check if the playlist is empty. If it is, you should reset the `userData` object to its original state.
 
-Use an `if` statement to check if the `userData.songs` has a length of `0`.
+Use an `if` statement to check if the `userData?.songs` has a length of `0`.
 
 # --hints--
 
-You should create an empty `if` statement with the condition `userData.songs.length === 0`
+You should create an empty `if` statement with the condition `userData?.songs.length === 0`.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -738,7 +738,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
index 7dfc4756e51..36307f31ade 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
@@ -33,19 +33,19 @@ Inside your `if` statement, declare a `resetButton` constant, then use `createEl
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*.*\s*\}/)
 ```
 
 You should use the `createElement` method to create a `button`.
 
 ```js
-assert.match(code, /document\.createElement\(('|")button\1\);?/)
+assert.match(code, /document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 You should assign your newly created `button` element to a `resetButton` constant.
 
 ```js
-assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?/)
+assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 # --seed--
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -708,7 +708,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
 
   }
 --fcc-editable-region--
@@ -769,7 +769,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
index cae5f13a4be..38132ec8916 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
@@ -18,7 +18,7 @@ Set the `id` attribute of `resetButton` to `reset` and its `aria-label` attribut
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should use `resetButton.id` to create an `id` attribute named `reset` for the `resetButton`.
@@ -628,7 +628,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
index 7a644043fe5..49ec13f40e8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
@@ -32,7 +32,7 @@ assert.match(code, /resetButton\.appendChild\(/)
 You should pass in `resetText` as the value of your first `appendChild()`.
 
 ```js
-assert.match(code, /resetButton\.appendChild\(resetText\);?/)
+assert.match(code, /resetButton\.appendChild\(\s*resetText\s*\);?/)
 ```
 
 You should use the `appendChild()` method on `playlistSongs`.
@@ -44,7 +44,7 @@ assert.match(code, /playlistSongs\.appendChild\(/)
 You should pass in `resetButton` as the value of your second `appendChild()`.
 
 ```js
-assert.match(code, /playlistSongs\.appendChild\(resetButton\);?/)
+assert.match(code, /playlistSongs\.appendChild\(\s*resetButton\s*\);?/)
 ```
 
 # --seed--
@@ -642,7 +642,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -773,7 +773,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
index b902d2c9b28..d990cf0907f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
@@ -22,13 +22,13 @@ assert.match(code, /resetButton\.addEventListener\(/)
 Your `resetButton` event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 The callback function of your event listener should use arrow syntax and have an empty pair of curly braces.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -690,7 +690,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -760,7 +760,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
index 25fcf7a0227..3aeb230d795 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
@@ -7,22 +7,22 @@ dashedName: step-84
 
 # --description--
 
-You need to assign the `userData.songs` property to the initial `allSongs` array. This will reset the playlist to its original state.
+To reset the playlist to its original state, spread `allSongs` into an array and assign it to `userData.songs`.
 
-Spread `allSongs` into an array and assign it to `userData.songs`.
+*Note*: You should not use optional chaining for the `userData.songs` because the song will not be `null` or `undefined` at this point.
 
 # --hints--
 
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\s*\);?/)
 ```
 
 You should assign `[...allSongs]` to `userData.songs`.
 
 ```js
-assert.match(code, /userData\.songs\s*=\s*\[\.\.\.allSongs\]/)
+assert.match(code, /userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -684,7 +684,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
index 3be72a8c361..e18dfd8a397 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
@@ -22,25 +22,25 @@ Remove the reset button from the playlist by calling the `remove()` method on th
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*.*\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*.*\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
 You should use the `remove()` method to remove the `resetButton` from the DOM.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*resetButton\.remove\(\);?\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*resetButton\.remove\(\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -702,7 +702,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -776,7 +776,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
index b463243fa12..f515c9aaa77 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
@@ -24,13 +24,13 @@ assert.match(code, /audio\.addEventListener\(/)
 The event listener you used on on your `audio` variable should listen for an `ended` event.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback to your `ended` event listener.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 
@@ -629,7 +629,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -768,7 +768,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
index a4f88d37f6c..c72e6cd7be3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
@@ -7,14 +7,14 @@ dashedName: step-77
 
 # --description--
 
-Within the button element in the `renderSongs` function, add an `onclick` attribute as the first attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
+Within the button element in the `renderSongs` function, add an `onclick` attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
 
 # --hints--
 
-You should add an `onclick` attribute as the first attribute of the delete button and pass in `deleteSong(${song.id})`.
+You should add an `onclick` attribute to the delete button and pass in `deleteSong(${song.id})`.
 
 ```js
-assert.match(code, /<button\s+onclick=('|")deleteSong\(\$\{song\.id\}\)\1\s*class=('|")playlist-song-delete\2\s*aria-label=('|")Delete\s*\$\{song\.title\}\3\s*>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")deleteSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
index 1935bf18c89..6b13dde37f4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
@@ -7,30 +7,35 @@ dashedName: step-87
 
 # --description--
 
-Notice that the album art in the HTML and songs in the `allSongs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
+Notice that the album art in the HTML and songs in the `userData.songs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
 
 Next, you need to check if there is a next song to play. Retrieve the current song index by calling the `getCurrentSongIndex()` function, and save it in a `currentSongIndex` constant.
 
-After that, create a `nextSongExists` constant that checks if a next song exists.
+After that, create a `nextSongExists` constant that contains the boolean value `true` or `false` depending on if the next song exists.
 
 # --hints--
 
 You should not modify the existing `ended` event listener and its content.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should create a `currentSongIndex` constant and set it to the calling of the `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
-You should check if a next song exists with `userData?.songs[currentSongIndex + 1] !== undefined` and set it to a `nextSongExists` constant.
+You should check if a next song exists comparing `userData.songs.length` and `currentSongIndex` and set it to a `nextSongExists` constant. If the last index of the songs array (`userData.songs.length - 1`) is bigger than the currentSongIndex that means there is a next song.
 
 ```js
-assert.match(code, /const\s+nextSongExists\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\]\s*!==\s*undefined;?/)
+const secondPart = code.split(`audio.addEventListener("ended", () => {`)[1];
+const middlePart = secondPart.split("});")[0]
+const codeOutputFirstTest = eval(middlePart + "\nnextSongExists;");
+assert.strictEqual(codeOutputFirstTest, true);
+const codeOutputSecondTest = eval(`\nfunction getCurrentSongIndex() { return 100; };\n` + middlePart + "\nnextSongExists;")
+assert.strictEqual(codeOutputSecondTest, false);
 ```
 
 # --seed--
@@ -593,7 +598,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -657,7 +662,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -732,7 +737,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
index 772ec501499..1c3e22c0081 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
@@ -14,13 +14,13 @@ Use an `if` statement to check if `nextSongExists` exists, then call the `playNe
 You should create an `if` statement with the condition `nextSongExists`.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*/)
 ```
 
 You should call the `playNextSong` function inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -583,7 +583,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -647,7 +647,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
index b8158e07e90..369a4ba721c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
@@ -14,25 +14,25 @@ If there is no next song in the playlist, use the `else` block to reset the `cur
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `currentSong` property of `userData` to `null` in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `songCurrentTime` property of `userData` to `0` in the `else` block of your `if`statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
 ```
 
 # --seed--
@@ -595,7 +595,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -659,7 +659,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
index 741a2cdd71c..a8288ddfe28 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
@@ -17,28 +17,28 @@ You should call the `pauseSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /pauseSong\(\);?/)
+assert.match(splitter[1], /pauseSong\(\s*\);?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /setPlayerDisplay\(\);?/)
+assert.match(splitter[1], /setPlayerDisplay\(\s*\);?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -636,7 +636,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -775,7 +775,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
@@ -1418,7 +1418,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -1482,7 +1482,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -1557,7 +1557,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
index bfffb932811..4246b5998c8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
@@ -26,7 +26,7 @@ Inside the `userData` object create a `songs` property. For the value, spread `a
 Your `userData` object should have a `songs` key set to `[...allSongs]`.
 
 ```js
-assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\],?/);
+assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\]\s*,?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
index f0df2b52cb3..ec4efa433e1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
@@ -14,7 +14,7 @@ To handle the current song's information and track its playback time, create a `
 You should not modify the existing `userData` object and its content.
 
 ```js
-assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\.\.\.allSongs\],?\s*/);
+assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\s*\.\.\.allSongs\s*\]\s*,?\s*/);
 ```
 
 Your `userData` object should have a `currentSong` key set to `null`.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
index b1a03b55aed..57bac97354b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
@@ -9,26 +9,26 @@ dashedName: step-30
 
 Add an `else` block to handle the current song's position in the playlist.
 
-Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData.songCurrentTime`.
+Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData?.songCurrentTime`.
 
 # --hints--
 
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 You should add an `else` block to the existing `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
 ```
 
-You should set `audio.currentTime` to `userData.songCurrentTime` inside the `else` block of your `if` statement.
+You should set `audio.currentTime` to `userData?.songCurrentTime` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\.songCurrentTime;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\?\.songCurrentTime;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
index 57f810fce12..57641b7b1eb 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
@@ -20,7 +20,7 @@ assert.match(code, /playlistSongElements\.forEach\(\s*(\(\s*songEl\s*\)|songEl)\
 You should use the `removeAttribute()` method on `songEl` and pass in `"aria-current"`.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(('|")aria-current\1\);?\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(\s*('|")aria-current\1\s*\);?\s*\}\s*\);?/)
 ```
 
 
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -691,7 +691,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
index 41adc61e224..b98869c98f2 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
@@ -13,10 +13,10 @@ Don't forget you need to interpolate with the dollar sign here.
 
 # --hints--
 
-You should add an `onclick` with the value `playSong(${song.id})` as the second attribute and value of the `button` element.
+You should add an `onclick` attribute with the value `playSong(${song.id})` to the `button` element.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-info\1\s*onclick\s*=\s*('|")playSong\(\$\{song\.id\}\)\2\s*>\s*<span\s+class\s*=\s*('|")playlist-song-title\3\s*>\$\{song\.title\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-artist\4\s*>\$\{song\.artist\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-duration\5\s*>\$\{song\.duration\}<\/span>\s*<\/button>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")playSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
index e2803b1ec92..bb74ae2d0c3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
@@ -28,19 +28,19 @@ Use the `createTextNode()` method to create a `Reset Playlist` text, then assign
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*\}/)
 ```
 
 You should use `document.createTextNode()` to create a `Reset Playlist` text.
 
 ```js
-assert.match(code, /document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 You should assign your created text node to a `resetText` constant.
 
 ```js
-assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -703,7 +703,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
 
 
@@ -766,7 +766,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
index eabed6accff..816413ab3df 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
@@ -23,13 +23,13 @@ Pass in a callback function to the `map()` method. The callback function should
 The callback function of your `map()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?.*\)?\s*=>\s*\{\s*\}\)/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(.*\)|[^()]+)\s*=>\s*\{\s*\}\s*\)/)
 ```
 
 Your `map()` method should have a `song` parameter in it's callback function.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?song\)?/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
index 0c3116b263b..7b801d74083 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
@@ -14,20 +14,20 @@ const animals = ["dog", "cat", "horse"];
 animals.indexOf("cat") // 1
 ```
 
-Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData.currentSong`.
+Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData?.currentSong`.
 
 # --hints--
 
 You should return `userData?.songs.indexOf()` inside your `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\()|(\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(|\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
 ```
 
-You should pass in `userData.currentSong` into the `indexOf()` method.
+You should pass in `userData?.currentSong` into the `indexOf()` method.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\(userData\.currentSong\);?)|(\s*{\s*return\s+userData\?\.songs\.indexOf\(userData\.currentSong\);?)/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?|\s*{\s*return\s+userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?\s*})/)
 ```
 
 # --seed--
@@ -625,7 +625,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
index 9459467ff95..d0490e16367 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
@@ -23,7 +23,7 @@ Add the `sort()` method to `userData?.songs`.
 You should add the `sort()` method to `userData?.songs`.
 
 ```js
-assert.match(code, /userData\?\.songs\.sort\(*.\);?/);
+assert.match(code, /userData\?\.songs\.sort\(.*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
index c176bdba41d..3bc959de143 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
@@ -18,25 +18,25 @@ The variables will not change, so use `const` to declare them.
 You should use `document.getElementById()` to get the `#author-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 You should assign the `#author-container` element to the variable `authorContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#load-more-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 You should assign the `#load-more-btn` element to the variable `loadMoreBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
index a19f0df87e0..31dfdb556fa 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
@@ -22,13 +22,13 @@ Make a `GET` request to this URL: `https://cdn.freecodecamp.org/curriculum/news-
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should not have a semi-colon after your `fetch` call.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
index 0deeefe6772..a4db8992e34 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
@@ -27,37 +27,37 @@ Again, don't terminate the code with a semi-colon yet.
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain the `.then()` method to your `fetch()` syntax
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(/)
 ```
 
 You should add a `res` parameter to your `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
 ```
 
 Your `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
 ```
 
 You should log the `res` parameter to the console so you can see the `Response` object.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
index 6f54ae6845d..ef79aaf57ed 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
@@ -16,19 +16,19 @@ Remove `console.log(res)` and implicitly return `res.json()` instead.
 You should remove the `console.log(res)`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*console\.log\(res\)\)/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should implicitly return `res.json()` in your `.then()`.
 
 ```js
-assert.match(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\)/)
+assert.match(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\);/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\);/)
 ```
 
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
index 783b07eef8b..0f1536d15b2 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
@@ -17,7 +17,7 @@ Chain another `.then()` to the existing `.then()` method. This time, pass in `da
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Your first `.then()` should not have a semi-colon.
@@ -29,37 +29,37 @@ assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not not have semi-colon after it.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
index 005458c51d4..176980e02a8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
@@ -18,67 +18,67 @@ Chain `.catch()` to the last `.then()`. Pass in a callback function with `err` a
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not have a semicolon.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\);/)
 ```
 
 You should chain the `.catch()` method to the second `.then()` you already have.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
 ```
 
 You should add an `err` parameter to your `.catch()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
 ```
 
 Your `.catch()` method should have an arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
 ```
 
 Your `.catch()` method should use `console.error()` to log `err` to the console with the text `` `There was an error: ${err}` ``. Don't forget to use backticks.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\)\s*;?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
index 17394411d55..6fd16487f47 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
@@ -48,7 +48,7 @@ assert.match(code, /let\s+authorDataArr/)
 You should set your `authorDataArr` variable to an empty array (`[]`).
 
 ```js
-assert.match(code, /let\s+authorDataArr\s*=\s*\[\];?/)
+assert.match(code, /let\s+authorDataArr\s*=\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
index 47e472af154..43c53ed6f42 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
@@ -14,7 +14,7 @@ Inside your `displayAuthors` function, chain `.forEach()` to `authors`.
 You should chain `.forEach()` to `authors`.
 
 ```js
-assert.match(code, /authors\.forEach\(\)/)
+assert.match(code, /authors\.forEach\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
index 29542579aa5..efa3631cb88 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
@@ -34,7 +34,7 @@ assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*/)
 Your callback function should be empty.
 
 ```js
-assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\)\s*=>\s*\{\s*\}\s*\);?/)
+assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
index 7dc38176412..be95441c2b2 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
@@ -16,7 +16,7 @@ First, remove your `console.log()` statement. Then, assign `data` to the `author
 You should remove the console log showing the `data`.
 
 ```js
-assert.notMatch(code, /console\.log\(data\);/)
+assert.notMatch(code, /console\.log\(\s*data\s*\);/)
 ```
 
 You should assign `data` to the `authorDataArr` variable
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
index 7483c6110b9..e046f7030b0 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
@@ -22,19 +22,19 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should have a console log with the text `Author Data Array:`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1/)
 ```
 
 You should use comma to separate your `Author Data Array:` text and `authorDataArr`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,/)
 ```
 
 `authorDataArr` should be the second argument of your console log statement.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
index c589af5f1d8..b489bc73b04 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
@@ -22,7 +22,7 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should remove the console log statement showing `authorDataArr`
 
 ```js
-assert.notMatch(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.notMatch(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 You should call your `displayAuthors` function.
@@ -34,19 +34,19 @@ assert.match(code, /displayAuthors\(/)
 You should call your `displayAuthors` function and pass in an argument of `authorDataArr.slice()`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first parameter of your `slice()` method should be `startingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second parameter of your `slice()` method should be `endingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\);?/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
index bba2001fe8b..adf78a9cdfc 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
@@ -34,13 +34,13 @@ assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*/)
 Your `fetchMoreAuthors` function should use arrow syntax.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `fetchMoreAuthors` function should be empty.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*\{\s*\}/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
index 50c2a9f6473..b02105d1cfe 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
@@ -24,21 +24,21 @@ You should call your `displayAuthors` function and pass in an argument of `autho
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first argument of your `slice()` method should be `startingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second argument of your `slice()` method should be `endingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\)/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
index dc7699579ea..edeca8a23b1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
@@ -24,13 +24,13 @@ assert.match(code, /loadMoreBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 Your event listener should take `fetchMoreAuthors` as the function to run.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1,\s*fetchMoreAuthors\);?/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1,\s*fetchMoreAuthors\s*\);?/)
 ```
 
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
index c3945c1d259..ab368e87f82 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
@@ -24,13 +24,13 @@ assert.match(code, /if\s*\(/)
 Your `if` statement should take in `authorDataArr.length <= endingIndex` as its condition.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*/)
 ```
 
 Your `if` statement should be empty.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
index 2f6c816ccdf..a7f08d14cf9 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
@@ -28,22 +28,21 @@ assert.match(code, /<p\s*class=("|')bio\1>/);
 You should check if the length of the `bio` text is greater than `50`.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50/)
+assert.match(code, /<p\s*class=("|')bio\1>\s*\$\{\s*bio\.length\s*>\s*50/)
 ```
 
 If the `bio` text is greater than `50` characters, you should extract the first 50 characters with `slice()` and replace the rest with `...`. Don't forget that indexes are zero-based.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:/);
 ```
 
 If the `bio` text is less than 50 characters, use the `bio` text directly.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:\s*bio\s*\}<\/p>/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:\s*bio\s*\}\s*<\/p>/);
 ```
 
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
index c1e0eeb6809..992e1f42f91 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
@@ -16,7 +16,7 @@ Inside the `.catch()`, remove the `console.error()` and set the `innerHTML` of t
 You should remove your `console.error` and its text.
 
 ```js
-assert.notMatch(code, /console\.error\(`There\s+was\s+an\s+error:\s+\$\{err\}`\);/)
+assert.notMatch(code, /console\.error\(\s*`There\s+was\s+an\s+error:\s+\$\{err\}`\s*\);/)
 ```
 
 You should access the `innerHTML` of `authorContainer` and set it to a `p` element. Don't forget to surround the `p` element with a template literal.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
index 731502df24e..e74c661b257 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
@@ -96,19 +96,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
index 1517ac2ebca..5f0e1c9eade 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
@@ -120,19 +120,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
index 7e43b171f1d..dae34a0c691 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
@@ -111,19 +111,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
index cec3498c8ba..ffc32bbf912 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
index 818c0e2176e..7c35fbcfbd3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
@@ -7,8 +7,9 @@ dashedName: step-5
 
 # --description--
 
-Now create a `fieldset` with an `id` set to `lunch`, and a corresponding `legend` and `div` element.
+Next, create a `fieldset` element with the `id` set to `lunch`.
 
+Within that element, create a `legend` element with the text `Lunch`, and an empty `div` with the `class` set to `input-container`.
 # --hints--
 
 You should create a second `fieldset` element in your `form`.
@@ -138,19 +139,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
index 18f1dc95634..67f13f2737d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
index 0673110b2e7..63ca53a4f73 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
@@ -188,19 +188,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
index d655981b4e6..c391aec8db8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
index 8860e1ee45f..3a8a6a6fd40 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
@@ -190,19 +190,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
index dba6fbadf29..ec8b8d09eff 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
@@ -196,19 +196,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
index a94ad7ec04c..dc720afa630 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
index e70dd72d854..1e2c3dab859 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
index 528ac68d4d9..fe29ac3d6d5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
index ae4ffa04801..b6682ababdb 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
@@ -29,13 +29,13 @@ You should create a variable called `calorieCounter`.
 assert.isDefined(calorieCounter);
 ```
 
-You should use `document.getElementById()` to get the `#calorie-counter` element.
+You should have `document.getElementById('calorie-counter')` in your code.
 
 ```js
 assert.match(code, /document\.getElementById\(\s*('|")calorie-counter\1\s*\)/g);
 ```
 
-You should store the `#calorie-counter` element in a variable called `calorieCounter`.
+You should assign `document.getElementById('calorie-counter')` to your `calorieCounter` variable.
 
 ```js
 assert.equal(calorieCounter, document.getElementById('calorie-counter'));
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
index f09f7d85a43..9bfc536e6b5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
index 8f78b26de48..ff31a431bc2 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
index dad3e77d4d5..b4ad5d7c770 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
@@ -7,6 +7,13 @@ dashedName: step-17
 
 # --description--
 
+In programming, it is standard practice to prefix a variable with `is` or `has` to indicate that the variable is a boolean.
+
+```js
+let isRunning = true;
+let hasCompleted = false;
+```
+
 Declare an `isError` variable and set it to `false`, but use `let` so you can reassign it later.
 
 # --hints--
@@ -148,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
index cbd61fce1e7..e79f924512d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
@@ -28,7 +28,7 @@ assert.isFunction(cleanInputString);
 Your `cleanInputString` function should take a `str` parameter.
 
 ```js
-assert.match(cleanInputString?.toString(), /\(str\)/);
+assert.match(cleanInputString?.toString(), /\(\s*str\s*\)/);
 ```
 
 `cleanInputString` should be an empty function.
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
index f83c9ced165..03c572bffd9 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
index 298daef04d9..8ec94b03b0c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
index 87ee877823c..7f92ea9ce3b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
index 8638b850f9f..9af71dd8805 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
@@ -7,24 +7,26 @@ dashedName: step-22
 
 # --description--
 
-Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
-
 You will need to check if the array `["+", "-", " "]` does not include the current character. You can use a combination of the <dfn>includes()</dfn> method and the <dfn>!</dfn> operator to do this.
 
 The `.includes()` method returns `true` if the array contains the character, and `false` if not. The logical NOT operator (`!`) will return the opposite of the value of the `.includes()` method.
 
-下面是一个例子：
+Here is an example checking if the current character is not in the vowels array. If it is not, that current character is pushed into the `consonantArray`:
 
 ```js
-const numbersArray = [1, 2, 3, 4, 5]
-const number = 6
+const inputString = "Hello World";
+const charArray = inputString.split('');
+const consonantArray = [];
 
-if (!numbersArray.includes(number)) {
-  console.log("The number is not in the array.")
+for (let i = 0; i < charArray.length; i++) {
+  if (!['a', 'e', 'i', 'o', 'u'].includes(charArray[i])) {
+    consonantArray.push(charArray[i]);
+  }
 }
-
 ```
 
+Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
+
 # --hints--
 
 Your `for` loop should have an `if` statement.
@@ -37,19 +39,19 @@ Your `for` loop should use `!["+", "-", " "].includes()`.
 
 ```js
 // the loop protection injects code so we have to look at the raw code directly
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(/);
 ```
 
-Your `for` loop should see if `strArray[i]` is found in `["+", "-", " "]`.
+Your `for` loop should see if `!["+", "-", " "].includes(strArray[i])`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?/);
 ```
 
 Your `for` loop should `push` `strArray[i]` to `cleanStrArray`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\[i\]\s*\)\s*;?\s*(\s*\})?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*;?\s*(\s*\})?/);
 ```
 
 # --seed--
@@ -171,19 +173,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
index 10c0c6f7b73..c0167aa3c5f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
@@ -168,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
index 9d1ca354781..69d38afcfd3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
index 2d1fc78e010..1b1d90308e9 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
index 042cf6afe29..ea05f89f18d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
index 673fc851bf2..22156aa15c8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
index 0c249136284..34b49108950 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
index fa94c367792..df5bb3a423e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
index 6f24e910212..932034898cb 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
index bc6c98e5a4c..ed8e298c7e5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
index a88fade3ab2..716f1c82079 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
index 650e53cbfa4..efb74cda217 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
index b83ae918551..98e854ae428 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
index 23e1e08081b..7237702ba5f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
@@ -6,8 +6,13 @@ dashedName: step-35
 ---
 
 # --description--
+Strings have a <dfn>.match()</dfn> method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
 
-Strings have a `.match()` method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
+```js
+const str = 'example string';
+const regex = /example/;
+const result = str.match(regex); // Returns ['example']
+```
 
 Return the result of calling the `.match()` method on `str` and passing your `regex` variable as the argument. You'll use this match result later on.
 
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
index 192f369dea6..4ed87418f3a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
index f6eb9a4fa8a..8b869db65b2 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
index 5f510ceb8b2..e933ad38423 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
index 83b8421617e..7bc6375f8d8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
@@ -26,13 +26,13 @@ Replace your concatenated string in the `querySelector` with a template literal
 You should use a template literal in your `querySelector` method.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`.*`\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`.*`\s*\)/);
 ```
 
 Your template literal should have the value `{targetId} .input-container`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`\$\{targetId\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`\$\{targetId\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
index f7eace30b0c..17eb001590e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
@@ -20,13 +20,13 @@ assert.notMatch(addEntry.toString(), /targetId\s*=/);
 You should replace the `targetId` reference in your template literal with `entryDropdown.value`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 You should add `#` at the beginning of your template literal.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
index 7617aa8137f..504fd8a13e1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
index d47a35f25f3..df3e8704ae4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
@@ -24,13 +24,13 @@ assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.query
 You should access the `length` property of your `querySelectorAll()`.
 
 ```js
-assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 Your `entryNumber` variable should be the `length` of the `querySelectorAll`.
 
 ```js
-assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 # --seed--
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
index 079121f891e..2d606a2b496 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
index ef71028ccec..566534e5eda 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
@@ -20,7 +20,7 @@ assert.match(code, /HTMLString\s*=\s*`\n\s*<label>.*<\/label>/);
 Your `label` element should have the text `Entry ${entryNumber} Name`.
 
 ```js
-assert.match(code, /HTMLString\s*=\s*`\n\s*<label>Entry\s\$\{entryNumber\}\sName<\/label>/);
+assert.match(code, /HTMLString\s*=\s*`\n\s*<label>\s*Entry\s\$\{entryNumber\}\sName\s*<\/label>/);
 ```
 
 # --seed--
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
index e6ceff88360..f98494e022e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
index 824fac4fe96..2d35cca0b73 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
index 8ae4399a3e6..5ea77b66671 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
index 4b52fcc14c0..83afbb2a406 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
@@ -185,19 +185,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
index 737f312d038..f4ccf15a0b5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
@@ -172,19 +172,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
index 7a970b711e5..bf145935a84 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
index 08b87e8f141..1af5286f498 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
index 3d1ffd2d501..193016cd818 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
@@ -146,19 +146,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
index 58460f3f19b..33005ae4d6f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
index c8050526431..1c5974383b4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
@@ -9,7 +9,25 @@ dashedName: step-50
 
 In the Role Playing Game project, you learned how to set a button's behavior by editing its `onclick` property. You can also edit an element's behavior by adding an event listener.
 
-Call the `.addEventListener()` method of the `addEntryButton`. It takes two arguments. The first is the event to listen to – you should pass the string `click`. The second is the callback function, or the function that runs when the event is triggered. Pass the `addEntry` function as the second argument. Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
+The following example uses the `addEventListener` method to add a click event to a button. When the button is clicked, the `printName` function is called.
+
+```html
+<button class="btn">Print name</button>
+```
+
+```js
+const button = document.querySelector('.btn');
+function printName() {
+  console.log("Jessica");
+}
+button.addEventListener('click', printName);
+```
+
+The `addEventListener` method takes two arguments. The first is the event to listen to. (Ex. `'click'`) The second is the callback function, or the function that runs when the event is triggered.
+
+Call the `.addEventListener()` method on the `addEntryButton`. Pass in the string `click` for the first argument and the `addEntry` function for the second argument.
+
+Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
 
 # --hints--
 
@@ -150,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
index 82561bf2fe3..9092e667e31 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
index e90b410589b..63f1868899f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
@@ -7,34 +7,26 @@ dashedName: step-56
 
 # --description--
 
-The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is an array-like which contains the elements that match the query selector.
+The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is a list of elements like an array. It contains the elements that match the query selector. You will need to loop through these elements in the list.
 
-You'll need to loop through these elements, so start by creating a `for` loop. Your iterator `i` should start at `0`, continue while it is less than the length of the list, and increment by `1` each iteration.
+In previous steps, you learned how to loop through an array using a `for` loop. You can also use a <dfn>for...of</dfn> loop to loop through an array and a `NodeList`.
+
+A `for...of` loop is used to iterate over elements in an iterable object like an array. The variable declared in the loop represents the current element being iterated over.
+
+```js
+for (const element of elementArray) {
+  console.log(element);
+}
+```
+
+Create a `for...of` loop that loops through the list. For the loop's variable name, use `const` to declare a variable called `item`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should have a `for` loop.
+You should have a `for...of` loop that loops through the `list` parameter. Use `item` for the loop's variable name.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(/g);
-```
-
-Your `for` loop should initialize a variable called `i` to `0`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;/g);
-```
-
-Your `for` loop should have a condition that checks if `i` is less than the length of `list`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;/g);
-```
-
-Your `for` loop should increment `i` by `1` each time it runs. Use the increment operator for this.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)/g);
+assert.match(code, /for\s*\(\s*const\s+item\s+of\s+list\s*\)\s*\{/);
 ```
 
 # --seed--
@@ -156,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
index 48aa97dfeb0..2df12cfeb84 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
@@ -9,40 +9,20 @@ dashedName: step-57
 
 The `NodeList` values you will pass to `list` will consist of `input` elements. So you will want to look at the `value` attribute of each element.
 
-Assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
+Assign `item.value` to a `const` variable called `currVal`.
 
 # --hints--
 
-You should have a `currVal` variable.
+You should use `const` to declare a new variable called `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=/);
+assert.match(code, /const\s+currVal\s*=/);
 ```
 
-You should access the element in `list` at index `i` using bracket notation.
+You should assign `item.value` to `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]/);
-```
-
-You should access the `value` attribute of the element in `list` at index `i`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]\.value/);
-```
-
-You should assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*list\[i\]\.value/);
-```
-
-Your `currVal` assignment should be in your `for` loop.
-
-```js
-// another hack, because the loop protection injects stuff
-const getCaloriesString = code.split("function getCaloriesFromInputs")[1];
-assert.match(getCaloriesString, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*(const|let)\s+currVal\s*=\s*list\[i\]\.value/g);
+assert.match(code, /const\s+currVal\s*=\s*item\.value/);
 ```
 
 # --seed--
@@ -164,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,15 +224,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
+  --fcc-editable-region--
+  for (const item of list) {
 
   }
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
index fb07b0cb722..97842e02f6b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
@@ -9,26 +9,26 @@ dashedName: step-58
 
 Remember that you wrote a function earlier to clean the user's input? You'll need to use that function here.
 
-Update your `currVal` declaration to be the result of calling `cleanInputString` with `list[i].value`.
+Update your `currVal` declaration to be the result of calling `cleanInputString` with `item.value`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should call your `cleanInputString` function.
+You should call the `cleanInputString` function inside the `getCaloriesFromInputs` function.
 
 ```js
 assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(/);
 ```
 
-You should pass `list[i].value` as the argument for `cleanInputString`.
+You should pass `item.value` as the argument for `cleanInputString` function.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 You should assign the result of your `cleanInputString` call to your `currVal` variable.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(code, /const\s+currVal\s*=\s*cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -238,15 +231,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = list[i].value;
+  for (const item of list) {
+    --fcc-editable-region--
+    const currVal = item.value;
+    --fcc-editable-region--
   }
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
index d42257d1f9a..8ee8e553d8c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -239,8 +232,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
 
   }
 }
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
index b671268f926..a563ef6686f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,8 +244,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
index 06bdde4b829..782c6f49e92 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
@@ -23,13 +23,13 @@ You should use a template literal to pass the `Invalid Input:` message to the `a
 
 ```js
 // because it transforms template literals...
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: /);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: /);
 ```
 
-You should use template literal syntax to display the first value in the `invalidInputMatch` array after the `Invalid Input:` text.
+You should display the first element of the `invalidInputMatch` array after the `Invalid Input:` text by using a template literal.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\)/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\)/);
 ```
 
 # --seed--
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
index 44f1a55b3e1..cb65c5bf85c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
@@ -7,6 +7,8 @@ dashedName: step-62
 
 # --description--
 
+In programming, `null` is meant to represent the absence of a value. In this case, if the user enters an invalid input, you want to alert them and then return `null` to indicate that the function has failed.
+
 Still within your `if` block, set `isError` to `true` and return `null`.
 
 # --hints--
@@ -14,13 +16,13 @@ Still within your `if` block, set `isError` to `true` and return `null`.
 After your `alert`, you should set `isError` to `true`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true/);
 ```
 
 After you modify `isError`, you should `return` the value `null`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
 ```
 
 # --seed--
@@ -142,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -233,8 +228,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
index e290bbcbacb..708ee466dd4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
@@ -17,6 +17,7 @@ The `Number` constructor is a function that converts a value to a number. If the
 
 ```js
 Number('10'); // returns the number 10
+Number('abc'); // returns NaN
 ```
 
 # --hints--
@@ -164,19 +165,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +249,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
index cde6480139c..b2f53e2bf8a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
@@ -17,12 +17,6 @@ You should `return` the `calories` value.
 assert.match(getCaloriesFromInputs.toString(), /return\s+calories/);
 ```
 
-Your new `return` statement should come after your `for` loop.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /calories\s*\+=\sNumber\(currVal\);\n\s*}\n\s*return\s+calories/)
-```
-
 # --seed--
 
 ## --seed-contents--
@@ -142,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -229,12 +216,11 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -244,9 +230,10 @@ function getCaloriesFromInputs(list) {
     }
     calories += Number(currVal);
   }
+  --fcc-editable-region--
 
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
index 33c55e66516..6ab34f94e4c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
@@ -26,7 +26,7 @@ assert.isFunction(calculateCalories);
 Your `calculateCalories` function should take an `e` argument.
 
 ```js
-assert.match(calculateCalories?.toString(), /\(e\)/);
+assert.match(calculateCalories?.toString(), /\(\s*e\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
index 29bc1f9eab8..99733132298 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
@@ -16,7 +16,7 @@ Add a line to your `calculateCalories` function that calls the `preventDefault()
 Your `calculateCalories` function should call `e.preventDefault()`.
 
 ```js
-assert.match(calculateCalories.toString(), /e\.preventDefault\(\)/);
+assert.match(calculateCalories.toString(), /e\.preventDefault\(\s*\)/);
 ```
 
 Your `calculateCalories` function should reset the global error flag to `false`.
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -240,8 +233,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
index 06adefd7de3..befef1b27a7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
@@ -22,13 +22,13 @@ assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#breakfast input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `odocument.querySelectorAll()` call to `breakfastNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -249,8 +242,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
index bfcffee79d7..bbde190ccbe 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#lunch input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `lunchNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -248,8 +241,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
index 108e16d4535..0832740311d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#dinner input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `dinnerNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `snacksNumberInputs` variable.
@@ -38,13 +38,13 @@ assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#snacks input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `snacksNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `exerciseNumberInputs` variable.
@@ -56,13 +56,13 @@ assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#exercise input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `exerciseNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -285,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
index 1c67ae2acf8..433a0cbd55b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +248,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
index e8b0ec0642a..ad40be75d1c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -254,8 +247,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
index 160a8d72d43..1dea7227318 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -291,8 +284,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
index 480d780d018..cf35677edad 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -262,8 +255,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
index ae85d6e4bac..d4084b69bad 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -260,8 +253,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
index 9050696d0b2..8fde6e007f0 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -270,8 +263,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
index c18dc2630b1..6d1195f6b85 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -265,8 +258,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
index 16571a855e8..57e0c47b8ff 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
@@ -162,19 +162,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +273,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
index b9d4883516e..cbd9f0550df 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
@@ -7,7 +7,7 @@ dashedName: step-78
 
 # --description--
 
-You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element.
+You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element on a new line at the end of the function.
 
 # --hints--
 
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -263,8 +256,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
index 41acab7cb40..4991037bf04 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
@@ -7,9 +7,16 @@ dashedName: step-79
 
 # --description--
 
-Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable, but lowercased.
+When you need to lower case a string, you can use the <dfn>toLowerCase()</dfn> method. This method returns the calling string value converted to lower case.
 
-Strings have a `.toLowerCase()` method that can help you with this. Do not give your `span` any text yet.
+```js
+const firstName = 'JESSICA';
+console.log(firstName.toLowerCase()); // Output: jessica
+```
+
+Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable. Your `surplusOrDeficit` variable should be converted to lower case using the `toLowerCase()` method.
+
+Do not give your `span` any text yet.
 
 # --hints--
 
@@ -160,19 +167,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -279,8 +279,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
index 6ea68231f41..34e7035ee70 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -258,8 +251,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
index f1e944248a8..bf2878652ae 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
@@ -9,7 +9,14 @@ dashedName: step-81
 
 When the user has a calorie deficit, the `remainingCalories` value will be negative. You don't want to display a negative number in the result string.
 
-`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number. In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
+`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number.
+
+```js
+const num = -5;
+Math.abs(num); // 5
+```
+
+In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
 
 # --hints--
 
@@ -24,7 +31,7 @@ Your `span` should have the text `${Math.abs(remainingCalories)} Calorie ${surpl
 
 ```js
 const htmlString = code.split(/output\s*\.\s*innerHTML\s*=\s*/)[1].split(/`/)[1];
-assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(remainingCalories\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
+assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(\s*remainingCalories\s*\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
 ```
 
 # --seed--
@@ -146,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -267,8 +267,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
index be874f97e8e..d0543944727 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
index 2a6f14a94e4..4c7decaecf9 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -283,8 +276,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
index 552cad22459..bcd152427af 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
@@ -158,19 +158,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -282,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
index 995034cd41a..f620c9c288e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
@@ -9,6 +9,11 @@ dashedName: step-85
 
 Finally, you need to make the `#output` element visible so the user can see your text. Your `output` variable is an Element, which has a `classList` property. This property has a `.remove()` method, which accepts a string representing the class to remove from the element.
 
+```js
+const paragraphElement = document.getElementById('paragraph');
+paragraphElement.classList.remove('hide');
+```
+
 Use the `.remove()` method of the `output` variable's `classList` property to remove the `hide` class. Don't forget to place the word `hide` inside quotes.
 
 # --hints--
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -277,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
index 93e6f6f21da..0380edf2327 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
index b5528c0edac..27ebabae5c7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
index 6e6fcc6e347..d0af2cf001e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
index 059a96702cd..1691def31e7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
@@ -9,6 +9,22 @@ dashedName: step-89
 
 Remember that `document.querySelectorAll` returns a `NodeList`, which is array-like but is not an array. However, the `Array` object has a `.from()` method that accepts an array-like and returns an array. This is helpful when you want access to more robust array methods, which you will learn about in a future project.
 
+The following example takes a `NodeList` of `li` elements and converts it to an array of `li` elements:
+
+```html
+<ul>
+  <li>List 1</li>
+  <li>List 2</li>
+  <li>List 3</li>
+</ul>
+```
+
+```js
+const listItemsArray = Array.from(document.querySelectorAll('li'));
+
+console.log(listItemsArray); //Output: (3) [li, li, li]
+```
+
 Wrap your `inputContainers` query selector in `Array.from()`. Do this on the same line as your declaration.
 
 # --hints--
@@ -144,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -269,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
index 090164cbcd0..aee6b90d972 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
@@ -7,33 +7,25 @@ dashedName: step-90
 
 # --description--
 
-It is time for another loop. Use a `for` loop to iterate through the `inputContainers` array.
+It is time for another loop. Create a `for...of` loop with a variable called `container` to iterate through the `inputContainers` array.
 
-Inside the loop, set the `innerHTML` property of the element at the current index to an empty string. This will clear all of the contents of that input container.
+Inside the loop, set the `innerHTML` property of the `container` to an empty string. This will clear all of the contents of that input container.
 
 # --hints--
 
-Your `clearForm` function should have a `for` loop.
+Your `for...of` loop should iterate through the `inputContainers` array. The loop's variable name should be `container`.
 
 ```js
-// loop protect injects stuff, so let's look at the raw code again
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(/);
+assert.match(clearForm, /for\s*\(\s*const\s+container\s+of\s+inputContainers\s*\)/);
 ```
 
-Your `for` loop should iterate through the `inputContainers` array. Remember to use `i` as your iterator.
+Your `for...of` loop should set the `innerHTML` property of `container` to an empty string.
 
 ```js
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*inputContainers\.length\s*;\s*i\s*\+\+\s*\)/);
-```
-
-Your `for` loop should set the `innerHTML` property of `inputContainers[i]` to an empty string.
-
-```js
-const clearForm = code.split("function clearForm()")[1];
-const forLoop = clearForm.split("for")[1];
-assert.match(forLoop, /inputContainers\[\s*i\s*\]\s*\.innerHTML\s*=\s*(`|'|")\1\s*/);
+const forOfLoop = clearForm.split("for")[1];
+assert.match(forOfLoop, /container\s*\.\s*innerHTML\s*=\s*(`|'|")\1\s*/);
 ```
 
 # --seed--
@@ -155,19 +147,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +265,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
index 6c700050094..9202886f9d8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
index ae5fa054242..6b51a902869 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
index dc3cdb2b065..34b7e271cf4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
index 4baaabedf47..9fc5bcaac45 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -292,8 +285,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
@@ -425,19 +418,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -550,8 +536,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -567,8 +553,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
index 12dfec0a012..6af46dcdcbc 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
@@ -16,13 +16,13 @@ In your `createLabel` function, declare a `label` variable and assign it a new `
 You should declare a `label` variable in your `createLabel` function.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*(?:const|let|var)\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*(?:const|let|var)\s+label/);
 ```
 
 Your `label` variable should be declared with `const`.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*const\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*const\s+label/);
 ```
 
 You should use the `.createElement()` method of the `document` object.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
index 63b00dea5a4..4d93fe2178d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
@@ -22,7 +22,7 @@ assert.match(code, /letters\.forEach\(/);
 You should pass your `createLabel` function reference to the `.forEach()` method.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*createLabel\s*\)/);
+assert.match(code, /letters\.forEach\(\s*(?:\(\s*([\S]*)\s*\)|\s*([\S]*))\s*=>\s*createLabel\(\s*\1\2\s*\)\s*\)|letters\.forEach\(\s*createLabel\s*\)/);
 ```
 
 You should not pass a `createLabel` function call.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
index a8081d8c9a0..d6e060e8169 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-In your callback, call `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
+In your callback, you will need to make two function calls. Start by calling `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
 
 Then call the `.forEach()` method on your `letters` array. Pass an empty callback function which takes a `letter` parameter.
 
@@ -46,7 +46,13 @@ assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{/)
 Your callback function should be empty.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{\s*\}/)
+assert.match(code, /letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}/)
+```
+
+Your `letters.forEach()` callback function should be nested inside the `range(1, 99).forEach(number => {}` callback function.
+
+```js
+assert.match(code, /range\s*\(\s*1\s*,\s*99\s*\)\s*.forEach\s*\(\s*(\(\s*number\s*\)|number)\s*=>\s*\{\s*[^}]*letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}\s*\)\s*\}\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
index cf515d8e50c..e376c0eeb7d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
@@ -9,8 +9,6 @@ dashedName: step-17
 
 Now in your nested `.forEach()` call, declare an `input` variable. Use the `.createElement()` method of the `document` object to create an `input` element. Set the `type` attribute to `text` and the `id` attribute to `letter + number`.
 
-For accessibility, set the `aria-label` attribute to the same value as the `id` attribute.
-
 # --hints--
 
 You should declare an `input` variable.
@@ -67,18 +65,6 @@ You should set the `id` attribute of your `input` element to `letter + number`.
 assert.match(code, /input\.id\s*=\s*letter\s\+\snumber/)
 ```
 
-You should access the `ariaLabel` property of your `input` element.
-
-```js
-assert.match(code, /input\.ariaLabel/);
-```
-
-You should set the `aria-label` attribute of your `input` element to `letter + number`.
-
-```js
-assert.match(code, /input\.ariaLabel\s*=\s*letter\s\+\snumber/)
-```
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
index feca1ed4d3e..42633bfd960 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
@@ -1,8 +1,8 @@
 ---
 id: 643498328cb52026123e2b91
-title: 步骤 18
+title: Step 19
 challengeType: 0
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
index 188d57a3d4a..8d1ddcd5fb5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
@@ -1,8 +1,8 @@
 ---
 id: 643498755d54c6279ba09078
-title: 步骤 19
+title: Step 20
 challengeType: 0
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
index ac130ecc8eb..9d06932a530 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
@@ -1,8 +1,8 @@
 ---
 id: 6437124c4c03dd4c8fb35d56
-title: 步骤 20
+title: Step 21
 challengeType: 0
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
index bd9d601e721..58e532930ff 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
@@ -1,8 +1,8 @@
 ---
 id: 6437133052eaf04d7300e622
-title: 步骤21
+title: Step 22
 challengeType: 0
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
index df2002d00f1..b23e311ab0e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
@@ -1,8 +1,8 @@
 ---
 id: 643715013330824ecaa70442
-title: 步骤 22
+title: Step 23
 challengeType: 0
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
index 3e93378f19b..deb4a393803 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d1e5af8c0148fbef96d
-title: 步骤-23
+title: Step 24
 challengeType: 0
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
index 939f69f10f8..8c9bacddb49 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d80bc174a158c973080
-title: 步骤 24
+title: Step 25
 challengeType: 0
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
@@ -50,19 +50,19 @@ assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*n
 The first element of the array passed to `average()` should be the element at the `middle` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]/);
 ```
 
 The first element of the array passed to `average()` should be the element at the `middle + 1` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\)/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)/);
 ```
 
 If the ternary is false, you should return the value of `sorted` at the `middle` index. Use `Math.ceil()` to round the `middle` value up.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\[\s*Math\.ceil\(\s*middle\s*\)\s*\];?/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\s*\[\s*Math\.ceil\(\s*middle\s*\)\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
index 0a1015da9b2..efe3f42753d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
@@ -1,8 +1,8 @@
 ---
 id: 64496df724dd3716a71fe971
-title: 步骤 25
+title: Step 26
 challengeType: 0
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
index 58a18f5ec80..7b8b7d9ffe6 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
@@ -1,8 +1,8 @@
 ---
 id: 64496e9c6d7a2e189948e441
-title: 步骤 26
+title: Step 27
 challengeType: 0
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
index 41c1d575426..52e6a20efa0 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
@@ -1,8 +1,8 @@
 ---
 id: 6449749d20436c1f1dfadcf2
-title: 步骤 27
+title: Step 28
 challengeType: 0
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
index d311593c8d2..63c290f2fb7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
@@ -1,8 +1,8 @@
 ---
 id: 6449755666005520330cec5b
-title: 第 28 步
+title: Step 29
 challengeType: 0
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
index 6ade35ae87c..1dc1617bd6e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
@@ -1,8 +1,8 @@
 ---
 id: 64497da4062602213ecf32e7
-title: 步骤 29
+title: Step 30
 challengeType: 0
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
index cdbe9d2746e..e018fb06bbf 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
@@ -1,8 +1,8 @@
 ---
 id: 64497de936a2f322327e5c58
-title: 第 30 步
+title: Step 31
 challengeType: 0
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
index af6fbafdc82..9a418bcf2fb 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e0e5e5a2c2329785af4
-title: 步骤 31
+title: Step 32
 challengeType: 0
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
@@ -16,7 +16,7 @@ Use the `&&` operator to add a second condition to your `if` statement that also
 You should use the `&&` operator to add a second condition to your `if` statement that also checks if the first character of `value` is `=`. You may use `[0]`, `.startsWith()`, or `.charAt(0)`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
index aefb3d0142f..cea5d468a27 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e764135bd24b7960dd3
-title: 步骤 32
+title: Step 33
 challengeType: 0
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
index b99a36f9996..117a075e0f3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
@@ -1,8 +1,8 @@
 ---
 id: 6449842c6f6c84261075e4c9
-title: 步骤 33
+title: Step 34
 challengeType: 0
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
index c4ed920d770..f331b2e13dc 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
@@ -1,8 +1,8 @@
 ---
 id: 64498473a17adc26ef0ecc2d
-title: 步骤 34
+title: Step 35
 challengeType: 0
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
index 695ee1a2095..869aa786b1b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
@@ -1,8 +1,8 @@
 ---
 id: 6449849b78f43527be1e8a98
-title: 步骤 35
+title: Step 36
 challengeType: 0
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
index a79f2893d16..379d979b83e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
@@ -1,8 +1,8 @@
 ---
 id: 64498542cab69128ab24e4de
-title: 步骤 36
+title: Step 37
 challengeType: 0
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
index 1fd3f993e67..db2048f5154 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
@@ -1,8 +1,8 @@
 ---
 id: 6449860d84c9e22cbd7b497c
-title: 步骤 37
+title: Step 38
 challengeType: 0
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
index 6428f7d7f31..1d217df30cf 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
@@ -1,8 +1,8 @@
 ---
 id: 6449863f592af72d9be0959e
-title: 步骤 38
+title: Step 39
 challengeType: 0
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
index 9a519a78bd0..97250208fe7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
@@ -1,8 +1,8 @@
 ---
 id: 6449874d5191562eb3313b3f
-title: 步骤 39
+title: Step 40
 challengeType: 0
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
index 834eadd5d6b..f48039d757e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
@@ -1,8 +1,8 @@
 ---
 id: 6449876e7aae0d2f8257a497
-title: 步骤 40
+title: Step 41
 challengeType: 0
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
index 1c2fc283139..6e3f9b611c6 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
@@ -1,8 +1,8 @@
 ---
 id: 64498b085028fc30a58bb6a7
-title: 步骤 41
+title: Step 42
 challengeType: 0
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
index 3a5ac76e780..d0a3366315c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0889c6ff4baa46ac1c50
-title: 步骤 42
+title: Step 43
 challengeType: 0
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
index 87d5c10e7c6..716a7d4ca9a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
@@ -1,8 +1,8 @@
 ---
 id: 646d09a07241aaab1e777080
-title: 第 43 步
+title: Step 44
 challengeType: 0
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
index a2ed6fd3ccf..c303ed54de9 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0a022da7bcabf3e3aca3
-title: 步骤 44
+title: Step 45
 challengeType: 0
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
index 2a181970efc..75cdd0b7890 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0d20108440acc95a6b32
-title: 步骤 45
+title: Step 46
 challengeType: 0
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
index 1ab5be9d362..e8720b88a53 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0db5175974ad8633b71c
-title: 步骤 46
+title: Step 47
 challengeType: 0
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
index bbb099862aa..d5c1b76abff 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0e4636e14eae2bb3b992
-title: 步骤 47
+title: Step 48
 challengeType: 0
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
index be725c461fb..bce3cb02167 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1980018efaaec2b1c28b
-title: 步骤 48
+title: Step 49
 challengeType: 0
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
index 9cc0565e4a4..7f8eb0a90b8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
@@ -1,8 +1,8 @@
 ---
 id: 646d19fc4705e4af65c3e688
-title: 步骤 49
+title: Step 50
 challengeType: 0
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
index 5b9993fe701..b8b6d95b2e5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1b96dd7ea4b0061458bc
-title: 步骤 50
+title: Step 51
 challengeType: 0
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
index 84ce02801ef..fb0d686e40d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
@@ -1,13 +1,13 @@
 ---
 id: 646d1cadf0d96ab0b7e12da4
-title: 步骤 51
+title: Step 52
 challengeType: 0
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
 
-Because `elemValue` returns a function, your `addChars` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
+Because `elemValue` returns a function, your `addCharacters` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
 
 <!-- TODO: Explain further? -->
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
index e01ea665686..c1ef0ae4591 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1d67f9261fb15a795588
-title: 第 52 步
+title: Step 53
 challengeType: 0
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
index 75b89433010..81a967ea80d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1e531042dfb24da1f032
-title: 步骤 53
+title: Step 54
 challengeType: 0
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
@@ -16,13 +16,13 @@ The callback function takes a few parameters. The first is the matched string. P
 You should pass an arrow function as the second argument to your `.replace()` method.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 Your arrow function should take a `match` parameter.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
index d9dd437b357..4e0bdcafe1b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3141790b3cb337dd611a
-title: 第 54 步
+title: Step 55
 challengeType: 0
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
index b51775342dd..a976d2e313d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
@@ -1,8 +1,8 @@
 ---
 id: 646d382c4d70ceb3dba1e830
-title: 步骤 55
+title: Step 56
 challengeType: 0
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
index 5c095a8be89..7a1435a9e93 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
@@ -1,8 +1,8 @@
 ---
 id: 646d386a685620b49db4be76
-title: 步骤 56
+title: Step 57
 challengeType: 0
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
index c74ca4aa762..c6980b6b44a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38c326f3c8b54023de38
-title: 步骤 57
+title: Step 58
 challengeType: 0
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
index 7201f62cff0..0af42bfb322 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38f906b94cb5fe6ce7de
-title: 步骤 58
+title: Step 59
 challengeType: 0
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
index 769b21464d9..daa12199dcb 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3952f6af37b6a1c241c2
-title: 步骤 59
+title: Step 60
 challengeType: 0
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
index acbee766fc9..e9f8b5ce15d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
@@ -1,8 +1,8 @@
 ---
 id: 646d39c156fe94b7482c3ab6
-title: 步骤 60
+title: Step 61
 challengeType: 0
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
index 76dcfbde52d..3fa9bd07097 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3b27cd3c56b875256301
-title: 步骤 61
+title: Step 62
 challengeType: 0
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
index 70c5eed15b1..4e1043eecb1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3bc75fe0c9b972da3323
-title: 步骤 62
+title: Step 63
 challengeType: 0
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
index e7eb1e3b3ae..ec294284249 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3c146e10b0ba222bb2a7
-title: 步骤 63
+title: Step 64
 challengeType: 0
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
index 56dd03f3cea..747899bb3e3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d037872fbbae0a8ec0e
-title: 步骤 64
+title: Step 65
 challengeType: 0
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
index 4851791339a..022a6c568cb 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d65be79c8bb9c7df9ff
-title: 步骤 65
+title: Step 66
 challengeType: 0
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
index f1ef73b10a6..9615d7f929a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d80c3b4aebc4103618e
-title: 第 66 步
+title: Step 67
 challengeType: 0
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
index 67a264e5b67..196385d39b2 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3da8501e15bcd355ba1d
-title: 步骤 67
+title: Step 68
 challengeType: 0
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
index 2d76fbc7942..3cb7c61d53f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e135ab3abbdbfe5c899
-title: 步骤 68
+title: Step 69
 challengeType: 0
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
index e3717c49c9a..8c653ee86f4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e64b15f92be6e61704e
-title: 步骤 69
+title: Step 70
 challengeType: 0
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str
 Your callback function should use bracket notation to access the property of the `infixToFunction` object that matches the value of the `operator` parameter.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
index 2ada342fef4..cd6d06d7e99 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3ee7b17ae3bf48610033
-title: 步骤 70
+title: Step 71
 challengeType: 0
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
@@ -14,19 +14,19 @@ dashedName: step-70
 Your callback function should return the result of calling `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(/);
 ```
 
 You should pass `arg1` as the first argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1/);
 ```
 
 You should pass `arg2` as the second argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
index d38836b5c15..2145e640b31 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f1fd12f76c02c823bb8
-title: 步骤 71
+title: Step 72
 challengeType: 0
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
@@ -16,13 +16,13 @@ Wrap each of your `infixToFunction[operator]` arguments in a `parseFloat()` call
 You should wrap `arg1` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
 ```
 
 You should wrap `arg2` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
index 0bc77a74b97..f9fcf26f42e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f718b5f8dc102cd528e
-title: 步骤 72
+title: Step 73
 challengeType: 0
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
index fab20406889..d7bdc37d7b2 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
@@ -1,8 +1,8 @@
 ---
 id: 646d404259f512c1a9e86ac1
-title: 步骤 73
+title: Step 74
 challengeType: 0
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
index a2645266232..167d450138d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40c543943ec250039682
-title: 步骤 74
+title: Step 75
 challengeType: 0
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
index 9ce8727d40f..660a596da8e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40fe4b7b50c30c2b4cd8
-title: 步骤 75
+title: Step 76
 challengeType: 0
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
index e1d6722aa56..0bc08a4012e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
@@ -1,8 +1,8 @@
 ---
 id: 646d41e23b583fc3b8cc4579
-title: 步骤 76
+title: Step 77
 challengeType: 0
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
index b686359ba1d..16562b4bb2f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
@@ -1,8 +1,8 @@
 ---
 id: 646d423fade4a9c4636acd13
-title: 步骤 77
+title: Step 78
 challengeType: 0
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
index 35ac2028f8d..efc5d0ffc18 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
@@ -1,8 +1,8 @@
 ---
 id: 646d42f58deb2fc52adc6611
-title: 步骤 78
+title: Step 79
 challengeType: 0
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
index e6662c9c870..02383be897f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d43587d926bc5b6cb2e50
-title: 步骤 79
+title: Step 80
 challengeType: 0
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
index 02dc56d70b0..1ea064565a1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d448479c8fdc8dcec868c
-title: 步骤 80
+title: Step 81
 challengeType: 0
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
index 7060edc7f4a..b6fe908bbf8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d44da986f2bc9b72f5fe2
-title: 第 81 步
+title: Step 82
 challengeType: 0
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
index 79374203b13..3d6821dadd1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
@@ -1,8 +1,8 @@
 ---
 id: 646d451c2e44afca71b67818
-title: 步骤 82
+title: Step 83
 challengeType: 0
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
index 91a3d5af318..18d0465bd29 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4554721d43cb19a68bc4
-title: 步骤 83
+title: Step 84
 challengeType: 0
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
@@ -28,13 +28,13 @@ assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*cons
 Your `apply` function should access the property of the `spreadsheetFunctions` object that matches the `fn` value.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn/);
 ```
 
 Your `apply` function should call the `.toLowerCase()` method on `fn` in the property access.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]/);
 ```
 
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
index b4ba63c099d..b14d113cdfd 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45b739da5ecbf830c108
-title: 步骤 84
+title: Step 85
 challengeType: 0
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Your `apply` function is returning the spreadsheet function, but not actually ap
 Your `apply` function should call the `spreadsheetFunctions[fn.toLowerCase()]` function.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(/);
 ```
 
 You should pass a `toNumberList()` call to your `spreadsheetFunctions[fn.toLowerCase()]` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(/);
 ```
 
 You should pass `args` to your `toNumberList()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
index 64c6036fad8..95734fb4ffe 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45ee725632cca2555146
-title: 步骤 85
+title: Step 86
 challengeType: 0
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Now your `applyFunction` needs to return a result. Return the result of calling
 Your `applyFunction` function should return the result of calling the `.replace()` method on `str2`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(/);
 ```
 
 You should pass `functionCall` as the first argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall/);
 ```
 
 You should pass an empty arrow function as the second argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
 ```
 
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
index 1a333db8778..8eb18bbd464 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4626420eeecd51f241c2
-title: 步骤 86
+title: Step 87
 challengeType: 0
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Remember to make `fn` lower case.
 Your callback function should have `match` as the first parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
 ```
 
 Your callback function should have `fn` as the second parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
 ```
 
 Your callback function should have `args` as the third parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
 ```
 
 Your callback function should use an implicit return.
 
 ```js
-assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
+assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
 ```
 
 Your callback function should return the result of calling the `.hasOwnProperty()` method on the `spreadsheetFunctions` object.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
 ```
 
 You should pass `fn` to the .`hasOwnProperty()` method.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn/);
 ```
 
 You should call the `.toLowerCase()` method on `fn`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
index c9150717c85..1fd62328533 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d467c6994f4ce0dc416a4
-title: 步骤 87
+title: Step 88
 challengeType: 0
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
@@ -14,31 +14,31 @@ Use the ternary operator to turn your `.hasOwnProperty()` call into the conditio
 Your callback function should use ternary syntax.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
 ```
 
 If the ternary condition is true, your callback function should return the result of calling `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\s*\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\s*\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
 ```
 
 You should pass `fn` as the first argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
 ```
 
 You should pass `args` as the second argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
 ```
 
 If the ternary is false, you should return `match`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
index 52040ad650e..222c5c8a20d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
@@ -1,8 +1,8 @@
 ---
 id: 646d46c03e7d02cecb30f021
-title: 步骤 88
+title: Step 89
 challengeType: 0
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
@@ -14,25 +14,25 @@ Now you can start applying your function parser to your `evalFormula` logic. Dec
 You should declare a `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
 ```
 
 You should use `const` to declare your `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*const\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*const\s+functionExpanded\s*=\s*/);
 ```
 
 You should assign the `functionExpanded` variable the result of calling your `applyFunction` function.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
 ```
 
 You should pass `cellExpanded` to your `applyFunction` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
index e2210bcddf4..48b1cab80ed 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4717a689e1cfa232e357
-title: 步骤 89
+title: Step 90
 challengeType: 0
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Use a ternary to check if `functionExpanded` is equal to the original string `x`
 Your `evalFormula` function should use the `return` keyword.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
 ```
 
 Your `return` statement should check if `functionExpanded` is equal to `x`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
 ```
 
 Your `return` statement should use a ternary operator.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
 ```
 
 If the ternary condition is true, your `evalFormula()` should return `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
 ```
 
 If the ternary condition is false, your `evalFormula()` should return the result of calling `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
 ```
 
 You should pass `functionExpanded` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
 ```
 
 You should pass `cells` as the second argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
index b673db4e2c4..c1249111d86 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4769ba65f1d05ef6b634
-title: 步骤 90
+title: Step 91
 challengeType: 0
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
@@ -16,19 +16,19 @@ Inside your `if` statement, set the `value` of the `element` to be the result of
 You should update the `value` property of `element` in your `if` block.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
 ```
 
 You should assign the `value` property the result of calling your `evalFormula()` function.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
 ```
 
 You should not pass any arguments to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
index 2f377e6b3ab..9ef5920b36a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
@@ -1,8 +1,8 @@
 ---
 id: 646d47c8f58107d10f1e5106
-title: 步骤 91
+title: Step 92
 challengeType: 0
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
@@ -14,19 +14,19 @@ The first argument for your `evalFormula` call needs to be the contents of the c
 You should pass `value` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
 ```
 
 You should call the `.slice()` method on the `value` argument.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(/);
 ```
 
 You should pass the number `1` as the argument to your `.slice()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(\s*1\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
index 69bbaccf695..c2b4d2b8c71 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4813c17b37d1e261a566
-title: 步骤 92
+title: Step 93
 challengeType: 0
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
@@ -14,19 +14,19 @@ You can quickly get all cells from your page by getting the `#container` element
 For the second parameter of your `evalFormula()` call, you should call the `.getElementById()` method of the `document` object.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
 ```
 
 You should pass `container` as the argument to your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
 ```
 
 You should access the `children` property of the result of your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
index 1b9a8076a4b..ac6184b9d56 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
@@ -1,8 +1,8 @@
 ---
 id: 646d486aec20f7d2a581cc36
-title: 步骤 93
+title: Step 94
 challengeType: 0
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
@@ -14,7 +14,7 @@ Unfortunately, that `children` property is returning a collection of elements, w
 You should wrap your `document.getElementById('container').children` in `Array.from()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
index 54d9f1309a4..98ffeb00088 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
@@ -1,8 +1,8 @@
 ---
 id: 646d48b936802fd34c3f05af
-title: 步骤 94
+title: Step 95
 challengeType: 0
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
index 3712210e615..a4c682f9df4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d498c8ebc31d3f753b22e
-title: 步骤 95
+title: Step 96
 challengeType: 0
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
index 274cd2eb066..43c6ebe6441 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
@@ -1,8 +1,8 @@
 ---
 id: 646d49bfff9079d4b38df115
-title: 步骤 96
+title: Step 97
 challengeType: 0
-dashedName: step-96
+dashedName: step-97
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
index 86113fccf5b..0e9787dff11 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a07a8fb14d55cd70e09
-title: 步骤 97
+title: Step 98
 challengeType: 0
-dashedName: step-97
+dashedName: step-98
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
index a87399a8925..983d30989b0 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a5b32a1cad6165df286
-title: 步骤 99
+title: Step 100
 challengeType: 0
-dashedName: step-99
+dashedName: step-100
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
index d723f6cad0e..34ae3e371aa 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a8dbc04c6d6bb0001f8
-title: 步骤 100
+title: Step 101
 challengeType: 0
-dashedName: step-100
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
index 35b69db9e59..b221e737fdb 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4ab9b3b4c5d74fdd2154
-title: 步骤 101
+title: Step 102
 challengeType: 0
-dashedName: step-101
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
index 07cb06e547e..89e89d3ac90 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4b3d80ea98d824c8a4f9
-title: 步骤 102
+title: Step 103
 challengeType: 0
-dashedName: step-102
+dashedName: step-103
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
index 7cddacf2e97..eb5424ffa9d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
@@ -1,8 +1,8 @@
 ---
 id: 6491d38f5b09a021c4b5d5fe
-title: 步骤 98
+title: Step 99
 challengeType: 0
-dashedName: step-98
+dashedName: step-99
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
new file mode 100644
index 00000000000..3a606f8e1cf
--- /dev/null
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
@@ -0,0 +1,104 @@
+---
+id: 65ae458e23954c3469e0c209
+title: Step 18
+challengeType: 0
+dashedName: step-18
+---
+
+
+# --description--
+
+In earlier projects you learned about the `setAttribute` method. Another way to update an attribute in JavaScript is to use the following syntax:
+
+```js
+el.attribute = value;
+```
+
+The property names for hyphenated HTML attribute values, such as `aria-label`, follow camel case, becoming `ariaLabel`.
+
+```js
+el.ariaLabel = "Aria Label Value";
+```
+
+Set the `aria-label` attribute for the `input` element to the same value as the `id` attribute.
+
+
+# --hints--
+
+You should have an `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=/);
+```
+
+
+You should assign `letter + number` to `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=\s*letter\s*\+\s*number/);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="./styles.css" />
+    <title>Functional Programming Spreadsheet</title>
+  </head>
+  <body>
+    <div id="container">
+      <div></div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+#container {
+  display: grid;
+  grid-template-columns: 50px repeat(10, 200px);
+  grid-template-rows: repeat(11, 30px);
+}
+
+.label {
+  background-color: lightgray;
+  text-align: center;
+  vertical-align: middle;
+  line-height: 30px;
+}
+```
+
+```js
+const range = (start, end) => Array(end - start + 1).fill(start).map((element, index) => element + index);
+const charRange = (start, end) => range(start.charCodeAt(0), end.charCodeAt(0)).map(code => String.fromCharCode(code));
+
+window.onload = () => {
+  const container = document.getElementById("container");
+  const createLabel = (name) => {
+    const label = document.createElement("div");
+    label.className = "label";
+    label.textContent = name;
+    container.appendChild(label);
+  }
+  const letters = charRange("A", "J");
+  letters.forEach(createLabel);
+  range(1, 99).forEach(number => {
+     createLabel(number);
+--fcc-editable-region--
+    letters.forEach(letter => {
+     const input = document.createElement("input");
+     input.type = "text";
+     input.id = letter + number;
+
+    })   
+--fcc-editable-region--
+  })
+}
+```
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
index ff52ce0ba2b..3fcd7cb6605 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
@@ -16,7 +16,7 @@ Now you should be able to roll the dice a few times and see the values update.
 You should call your `updateStats` function inside the `else` clause.
 
 ```js
-assert.match(code, /updateStats\(\)/)
+assert.match(code, /updateStats\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
index b7b31853e98..a08ab5225b1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
@@ -28,7 +28,7 @@ assert.match(code, /const\s+updateRadioOption\s*=\s*\(.*\)\s*=>\s*{\s*[\s\S]*};?
 Your `updateRadioOption` function should take `optionNode` and `score` as parameters.
 
 ```js
-assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\)\s*=>\s*{\s*[\s\S]*};?/)
+assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\s*\)\s*=>\s*{\s*[\s\S]*};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
index eab6294fda8..9bf231cab3c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
@@ -14,7 +14,7 @@ To enable the radio buttons, you should set the `disabled` property on `scoreInp
 You should assign `false` to `scoreInputs[optionNode].disabled`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.disabled\s*=\s*false/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.disabled\s*=\s*false/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
index a7290e8faac..9e014bdbf58 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
@@ -14,7 +14,7 @@ Next, you will need to update the radio button's `value` to the current `score`.
 You should assign the `score` variable to `scoreInputs[optionNode].value`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.value\s*=\s*score/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.value\s*=\s*score/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
index 84c5e8d195c..d3666f7888d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
@@ -14,7 +14,7 @@ To display the current score, update the text content for the `span` element nex
 You should set the `textContent` property for `scoreSpans[optionNode]` to the following template literal: `, score = ${score}`.
 
 ```js
-assert.match(code, /scoreSpans\[\s*optionNode\s*\]\.textContent\s*=\s*`, score = \${score}`;?/);
+assert.match(code, /scoreSpans\s*\[\s*optionNode\s*\]\s*\.textContent\s*=\s*`, score = \${score}`;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
index def2f4c3ad9..6600d4ee501 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
@@ -22,7 +22,7 @@ assert.match(code, /updateRadioOption\(.*\);?/);
 You should have the arguments of `0` and `10` for the `updateRadioOption` function.
 
 ```js
-assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
index 9985d74a45c..356872c0164 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
@@ -14,7 +14,7 @@ Now that you have verified the `updateRadioOption` function works, remove the fu
 You should remove the `updateRadioOption` function call from your `else` clause.
 
 ```js
-assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
index d4e2a57a0fe..851957a5aba 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
@@ -18,19 +18,19 @@ Below your `if` statement, include an `else` clause that assigns `1` to `counts[
 You should have an `if` statement with a condition of `counts[num]`.
 
 ```js
-assert.match(code, /if\s*\(\s*counts\[num\]\s*\)/);
+assert.match(code, /if\s*\(\s*counts\s*\[\s*num\s*\]\s*\)/);
 ```
 
 You should use the `++` operator to increment the value of `counts[num]` by `1` inside your `if` statement.
 
 ```js
-assert.match(code, /counts\[num\]\s*\+\s*=\s*1|counts\[num\]\+\+/);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*\+\s*=\s*1|counts\s*\[\s*num\s*\]\s*\+\+/);
 ```
 
 You should assign `1` to `counts[num]` inside your `else` clause.
 
 ```js
-assert.match(code, /else\s*\{\s*counts\[num\]\s*=\s*1\s*;?\s*\}/);
+assert.match(code, /else\s*\{\s*counts\s*\[\s*num\s*\]\s*=\s*1\s*;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
index def84fbf784..36e4037620a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
@@ -22,7 +22,7 @@ assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s
 You should assign `counts[num]` to your `count` variable.
 
 ```js
-assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\[num\]\s*;?\s*}/);
+assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\s*\[\s*num\s*\]\s*;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
index ebfedf5281f..4624f26de37 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
@@ -16,7 +16,7 @@ Now, try rolling the dice again and you should see that the previous score `inpu
 You should call the `resetRadioOption` function inside the `rollDiceBtn` callback function.
 
 ```js
-assert.match(code, /resetRadioOption\(\);?/);
+assert.match(code, /resetRadioOption\(\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
index 24b59a223cb..934690d8949 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
@@ -22,7 +22,7 @@ assert.isFunction(resetGame);
 You should use arrow syntax for your `resetGame` function.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*}\s*;?/);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
index 1790fdf25df..796e39eb138 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
@@ -24,25 +24,25 @@ assert.match(code, /diceValuesArr\s*=\s*\[\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s
 You should reassign the `score` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `totalScore` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `rolls` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `round` variable to `1`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
index a4006a8e46f..41fb5a6b425 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
@@ -14,13 +14,13 @@ To reset each of the dice values to show `0`, apply a `forEach` method to the `l
 You should call the `forEach` method of the `listOfAllDice` variable.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
 ```
 
 For your callback function, you should use `dice` and `index` as parameters.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
index 6b28151e8b9..473dcda6801 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
@@ -14,13 +14,13 @@ Inside your callback function, update the `dice` text content by assigning it th
 You should access the `textContent` property of the `dice` parameter.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
 ```
 
 You should assign `diceValuesArr[index]` to `dice.textContent`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
index 19d50883b7d..a11b1936827 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
@@ -20,25 +20,25 @@ Lastly, update the `currentRoundText` text content by assigning it the `round` v
 You should assign `totalScore` to `totalScoreText.textContent`.
 
 ```js
-assert.match(code, /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
+assert.match(resetGame.toString(), /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
 ```
 
 You should use the `innerHTML` property to set the `scoreHistory` to an empty string.
 
 ```js
-assert.match(code, /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
+assert.match(resetGame.toString(), /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
 ```
 
 You should assign `rolls` to `currentRoundRollsText.textContent`.
 
 ```js
-assert.match(code, /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
+assert.match(resetGame.toString(), /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
 ```
 
 You should assign `round` to `currentRoundText.textContent`.
 
 ```js
-assert.match(code, /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
+assert.match(resetGame.toString(), /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
index 6bd6f4a99cb..c7fcc740c6a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
@@ -16,7 +16,7 @@ Assign the entire result of your `ternary` to `counts[num]`.
 You should assign `counts[num] ? counts[num] + 1 : 1` to `counts[num]` in the `for...of` loop.
 
 ```js
-assert.match(code, /counts\[num\]\s*=\s*counts\[num\]\s*\?\s*counts\[num\]\s*\+\s*1\s*:\s*1\s*;?/s);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*=\s*counts\s*\[\s*num\s*\]\s*\?\s*counts\s*\[\s*num\s*\]\s*\+\s*1\s*:\s*1\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
index 0762d14494c..164f14961f5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasThreeOfAKind\s*=/);
 You should assign `Object.values(counts)` to your `hasThreeOfAKind` variable.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(3)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\)\.includes\(3\)\s*;?/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*3\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
index ce4a5f680b5..4b6ec29b657 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasPair\s*=/);
 You should assign `Object.values(counts)` to your `hasPair` variable.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(2)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\)\.includes\(2\)\s*;?/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*2\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
index a1640536f7a..61a1d202cc5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
@@ -36,7 +36,7 @@ assert.match(code, /const\s+sortedNumbersArr\s*=\s*arr\.sort\(.*\);?/);
 Your callback function should use `a` and `b` for the parameters and implicitly return `a - b`.
 
 ```js
-assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(a,\s*b\)\s*=>\s*a\s*-\s*b\s*\));?/);
+assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(\s*a,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\));?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
index 4672e2a088e..36cf6b5957a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+smallStraightsArr\s*=?\s*;?/);
 You should store the strings `1234`, `2345` and `3456` in an array and assign it to your `smallStraightsArr`.
 
 ```js
-assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\];?/);
+assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
index ecbf62fd254..eb2dfe10cfc 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+largeStraightsArr\s*=?\s*;?/);
 You should store the strings `12345` and `23456` in an array and assign it to your `largeStraightsArr`.
 
 ```js
-assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\];?/);
+assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
index 0b86f49a9e2..8a07ad2ac53 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `smallStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `3` and `30` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
index 5f0b5fa364f..9d1d4f71af9 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `largeStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `4` and `40` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
index 2b0c02c2556..31d952cf77d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
@@ -16,7 +16,7 @@ Inside the `animate` function, create an `if` statement where the condition chec
 You should have an `if` statement that checks if the right key was pressed and the player's `x` position is less than 400.
 
 ```js
-assert.match(animate.toString(), /keys\.rightKey\.pressed\s*&&\s*player\.position\.x\s*<\s*400/);
+assert.match(animate.toString(), /keys\.rightKey\.(pressed|pressed\s*===\s*true)\s*&&\s*player\.position\.x\s*<\s*400/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
index bef04a56d71..af06a161b22 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
@@ -30,7 +30,7 @@ assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*
 You should call the `draw` method on each `platform`.
 
 ```js
-assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\)\s*;?\s*}?\s*\);?/);
+assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\s*\)\s*;?\s*}?\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
index da0e61b679f..5bbb8afd88d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
@@ -26,7 +26,7 @@ Your callback function should have a `platform` parameter.
 
 ```js
 const splitter = code.split("platform.position.x += 5;")
-assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\);?/);
+assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
index b1d15efefe4..14d729f01c0 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
@@ -9,17 +9,17 @@ dashedName: step-78
 
 Inside the callback function, create a new `const` variable called `collisionDetectionRules` and assign it an empty array.
 
-Inside that array, add a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+Inside that array, add a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 # --hints--
 
 You should have a `const` variable called `collisionDetectionRules` that is assigned an empty array.
 
 ```js
-assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\];?/);
+assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\s*\]\s*;?/);
 ```
 
-You should have a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+You should have a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 ```js
 assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*player\.position\.y\s*\+\s*player\.height\s*<=\s*platform\.position\.y\s*,?\s*]\s*;?/);
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
index 0c08e06cf30..2e200acaf38 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
@@ -14,7 +14,7 @@ Inside that array, add a boolean expression that checks if the player's `x` posi
 You should have a boolean expression that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
index e3a9beaeeb0..29ac07827f3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
@@ -14,7 +14,7 @@ Below that boolean expression, add another boolean expression that checks if the
 You should have a boolean expression that checks if the player's `x` position is less than or equal to the sum of the platform's `x` position and the platform's width minus one third of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
index 67b707a55ea..236e450f754 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
@@ -16,21 +16,21 @@ Below that, add another boolean expression that checks if the player's `y` posit
 You should not alter the existing `platformDetectionRules` array and its content.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position plus the player's height is greater than or equal to the platform's `y` position.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position is less than or equal to the sum of the platform's `y` position plus the platform's height.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\]\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
index 3540357507e..10b7ef5dd2e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
@@ -19,21 +19,21 @@ Your `CheckPoint` class should have a `draw` method.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{/);
 ```
 
 Your `draw` method should have a `fillStyle` property.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
 ```
 
 Your `draw` method should have a `fillRect` method.
 
 ```js
 const splitter = code.split('#f1be32')
-assert.match(splitter[1], /ctx\.fillRect\(this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\);?/);
+assert.match(splitter[1], /ctx\.fillRect\(\s*this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
index 69bb119f404..23b75f36146 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
@@ -25,14 +25,14 @@ assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\([^
 Your callback function should have a `checkpoint` parameter.
 
 ```js
-assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*[^)]*\s*\)\s*;?/);
+assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*[^)]*\s*\)\s*;?/);
 
 ```
 
 You should implicitly return a new `CheckPoint` instance.
 
 ```js
-assert.match(code, /\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
+assert.match(code, /\s*checkpointPositions\.map\s*\(\s*(\(checkpoint\s*\)|checkpoint)\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
index 5201d58a65c..421a3f3b0a7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
@@ -24,13 +24,13 @@ assert.match(code, /\bcheckpoints\b\s*\.\s*forEach\s*\(/s);
 You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*checkpoint\s*=>\s*{/s);
+assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*{?/s);
 ```
 
 You should call the `draw` method on each `checkpoint` inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\.forEach\s*\(\s*checkpoint\s*=>\s*{\s*checkpoint\.draw\(\s*\);?\s*}\s*\);?/s);
+assert.match(code, /\s*checkpoints\.forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*(\{\s*checkpoint\.draw\(\s*\)\s*;?\s*\}|checkpoint\.draw\(\s*\))\s*\)\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
index 5f3d9d11c92..afab68a0f2b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
@@ -24,7 +24,7 @@ You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
 const splitter = code.split("if (keys.rightKey.pressed && isCheckpointCollisionDetectionActive)")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(?checkpoint\)?\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*\{/);
 ```
 
 You should use the subtraction assignment operator to subtract 5 from the `checkpoint`'s `x` position.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
index 6cb4102b634..62ae4f16b16 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
@@ -42,7 +42,7 @@ assert.match(code, /\s*setTimeout\s*\(\s*\(\s*\)\s*=>[^,]*,\s*2000\s*\)/s);
 Your callback function should set the `checkpointScreen` `display` property to `none`.
 
 ```js
-assert.match(code, /\s*if\s*\(isCheckpointCollisionDetectionActive\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
+assert.match(code, /\s*if\s*\(\s*isCheckpointCollisionDetectionActive\s*\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
index 5a6cf966f64..0b1d06569b3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
@@ -24,7 +24,7 @@ Your callback function should have a `checkpoint` parameter and `index`.
 
 ```js
 const splitter = code.split("player.velocity.y = gravity;")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(checkpoint,\s*index\)\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*\(\s*checkpoint,\s*index\s*\)\s*=>\s*\{/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
index 92e0a4431c3..33f0e078f9e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
@@ -14,7 +14,7 @@ Inside the `if` statement, call the `claim` method on the `checkpoint` object.
 You should call the `claim()` method on the `checkpoint` object.
 
 ```js
-assert.match(code, /checkpoint\.claim\(\);?/)
+assert.match(code, /checkpoint\.claim\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
index 7c4ddccecb1..7694d7e3b46 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
@@ -24,7 +24,7 @@ assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\
 You should call the `showCheckpointScreen` function and pass in "You reached the final checkpoint!" as an argument.
 
 ```js
-assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\);?/)
+assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(\s*("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\s*\);?/)
 ```
 
 You should call the `movePlayer` function and pass in the provided arguments.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
index a2775be5fb7..dfb6c598b76 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
@@ -18,37 +18,37 @@ Begin by accessing the `task-form`, `confirm-close-dialog`, and `open-task-form-
 You should use `getElementById()` to access the `task-form` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should assign the `task-form` element to the variable `taskForm`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `confirm-close-dialog` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should assign the `confirm-close-dialog` element to the variable `confirmCloseDialog`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `open-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `open-task-form-btn` element to the variable `openTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
index d85c6ec42ef..486ec72115b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
@@ -14,37 +14,37 @@ You need to access more elements with the `getElementById()` method. This time y
 You should use `getElementById()` to access the `close-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `close-task-form-btn` element to the variable `closeTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `add-or-update-task-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should assign the `add-or-update-task-btn` element to the variable `addOrUpdateTaskBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `cancel-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 You should assign the `cancel-btn` element to the variable `cancelBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
index 9db4cf8ff66..8db261344dd 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
@@ -14,37 +14,37 @@ Next, access the `discard-btn`, `tasks-container`, and `title-input` elements us
 You should use `getElementById()` to access the `discard-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should assign the `discard-btn` element to the variable `discardBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `tasks-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should assign the `tasks-container` element to the variable `tasksContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `title-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 You should assign the `title-input` element to the variable `titleInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
index cfa235bb482..2762a937b80 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
@@ -14,25 +14,25 @@ The last set of elements you need to get from the HTML file are the `date-input`
 You should use `getElementById()` to access the `date-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should assign the `date-input` element to the variable `dateInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `description-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 You should assign the `description-input` element to the variable `descriptionInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
index 26f6e41c6e8..dd9c085a0af 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
@@ -13,16 +13,40 @@ Use `let` to create a `currentTask` variable and set it to an empty object. This
 
 # --hints--
 
-You should create a `taskData` constant set to an empty array.
+You should have a `const` variable called `taskData`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=/)
 ```
 
-You should use `let` to create an empty `currentTask` object.
+You should assign an array to your `taskData` constant.
 
 ```js
-assert.match(code, /let\s+currentTask\s*=\s*\{\};?/)
+assert.isArray(taskData);
+```
+
+Your `taskData` array should be empty.
+
+```js
+assert.isEmpty(taskData);
+```
+
+You should use `let` to create a `currentTask` variable.
+
+```js
+assert.match(code, /let\s+currentTask/);
+```
+
+You should assign an object to your `currentTask` variable.
+
+```js
+assert.isObject(currentTask);
+```
+
+Your `currentTask` object should be empty.
+
+```js
+assert.isEmpty(currentTask);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
index 0518d56451f..b9330c93a80 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
@@ -7,9 +7,15 @@ dashedName: step-7
 
 # --description--
 
-Add a `click` event listener to the `closeTaskFormBtn` variable, then use the `showModal()` method on your `confirmCloseDialog` variable. This will display a modal with the `Discard` and `Cancel` buttons.
+The HTML `dialog` element has a `showModal()` method that can be used to display a modal dialog box on a web page.
 
-`showModal()` is a method associated with the HTML `dialog` element. It is used to display a modal dialog box on a web page.
+```js
+dialogElement.showModal();
+```
+
+Add an event listener to the `closeTaskFormBtn` variable and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `showModal()` method on the `confirmCloseDialog` element. This will display a modal with the `Discard` and `Cancel` buttons.
 
 # --hints--
 
@@ -22,13 +28,13 @@ assert.match(code, /closeTaskFormBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `showModal()` method on `confirmCloseDialog`.
+Your event listener's callback function should call the `showModal()` method on the `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1,\s*\(.*\)\s*=>\s*{?\s*confirmCloseDialog\.showModal\(\);?\s*}?\s*\);?/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1,\s*\(.*\)\s*=>\s*(\{\s*confirmCloseDialog\.showModal\(\s*\)\s*;?\s*\}|confirmCloseDialog\.showModal\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
index 7522b77930c..e35c2e3ce56 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
@@ -7,11 +7,15 @@ dashedName: step-8
 
 # --description--
 
-If the user clicks the `Cancel` button, you want to cancel the process (close the modal showing the two buttons) so the user can continue editing.
+If the user clicks the `Cancel` button, you want to cancel the process and close the modal so the user can continue editing. The HTML `dialog` element has a `close()` method that can be used to close a modal dialog box on a web page.
 
-Add a `click` event listener to the `cancelBtn` element, then use the `close()` method on the `confirmCloseDialog` variable.
+```js
+dialogElement.close();
+```
 
-`close()` is a method of the window object you can use to close the current window, or a modal you create with the `dialog` element.
+Add an event listener to the `cancelBtn` element and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `close()` method on the `confirmCloseDialog` element.
 
 # --hints--
 
@@ -24,13 +28,13 @@ assert.match(code, /cancelBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `close()` method on `confirmCloseDialog`. Don't use curly braces.
+Your event listener's callback function should call the `close()` method on `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1\,\s*\(\)\s*\s*=>\s*confirmCloseDialog\.close\(\)\s*\);?/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1\s*\,\s*\(\s*\)\s*=>\s*(\{\s*confirmCloseDialog\.close\(\s*\)\s*;?\s*\}|confirmCloseDialog\.close\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
index c10921ec168..69066fae3e0 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
@@ -28,19 +28,19 @@ assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1/)
 You should use arrow syntax to set your event listener to an empty pair of curly braces.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 Your event listener should use the `close()` method on `confirmCloseDialog`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?/)
 ```
 
 Your event listener should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
index 76025c85026..84f0b16378b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
@@ -22,19 +22,19 @@ assert.match(code, /taskForm\.addEventListener\(/)
 Your event listener should listen for a `submit` event.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1/)
 ```
 
 You should use arrow syntax to set your event listener to an empty pair of curly braces with `e` as the parameter.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
 ```
 
 You should use the `e.preventDefault()` method to stop the browser from reloading the page.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\);?/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
index 19d47c6aedf..192a9671965 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
@@ -35,13 +35,13 @@ assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 You should pass in `item` as the parameter of the arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === currentTask.id`.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
index 77eabb67217..3a88b131647 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
@@ -30,19 +30,19 @@ assert.match(code, /const\s+taskObj\s*=\s*\{\s*id/)
 You should use template strings to get `titleInput.value` as the value of your `id` key and convert it to lowercase.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)/)
 ```
 
 You should use `.split(' ')` on `titleInput.value.toLowerCase()`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(('|")\s{1}\1\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)/)
 ```
 
 You should use `.join('-')` on `titleInput.value.toLowerCase().split(' ')`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
index 5997b90a0ab..432bfa8b2b7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
@@ -20,13 +20,13 @@ Create an `if` statement with the condition `dataArrIndex === -1`. Within the `i
 You should create an `if` statement with the condition `dataArrIndex === -1`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{/)
 ```
 
 Your `if` statement should have `taskData.unshift(taskObj)` in it's body.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}/)
 ```
 
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
index 9826fa47c55..7ea656a26ea 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
@@ -26,7 +26,7 @@ assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*(\s*\{?\(\s*ta
 You should use addition assignment to set the `innerHTML` of `tasksContainer` to an empty pair of backticks.
 
 ```js
-assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\)?\s*\}?)/)
+assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\s*\)?\s*\}?)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
index fbf0ba8541c..738650c0262 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
@@ -15,7 +15,7 @@ You should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("taskData.forEach")[1].split("});")
-assert.match(splitter[0], /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(splitter[0], /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
index d924b47cb6e..883465e1129 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
@@ -18,13 +18,13 @@ Use arrow syntax to create a `reset` function and set it to a pair of curly brac
 You should use `const` and arrow syntax to create a `reset` function.
 
 ```js
-assert.match(code, /const\s+reset\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+reset\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 Your `reset` function should be empty.
 
 ```js
-assert.match(reset.toString(), /\(\)\s*\{\s*\}/);
+assert.match(reset.toString(), /\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
index 83ec9d9ee94..5f36e0f9c1b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
@@ -34,7 +34,7 @@ assert.match(reset.toString(), /descriptionInput\.value\s*=\s*('|")\1;?/)
 You should use `classList` to toggle the class `hidden` on `taskForm`
 
 ```js
-assert.match(reset.toString(), /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(reset.toString(), /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 You should set `currentTask` to an empty object.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
index 64c2bf4889b..68617e2f279 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the `hidden` class on `taskForm`.
 
 ```js
 const splitter = code.split('<button type="button" class="btn">Delete</button>')
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /reset\(\)/)
+assert.match(code, /reset\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
index adbf27fbbee..228dbe54274 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("confirmCloseDialog.close();")
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /confirmCloseDialog\.close\(\);?\s*reset\(\);?/)
+assert.match(code, /confirmCloseDialog\.close\(\s*\);?\s*reset\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
index c026a492342..eebe042d9c6 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
@@ -16,7 +16,7 @@ To begin, within the `closeTaskFormBtn` event listener, create a `formInputsCont
 You should use `const` to create a variable `formInputsContainValues` with the value `titleInput.value || dateInput.value || descriptionInput.value;`
 
 ```js
-assert.match(code, /const\s+formInputsContainValues\s*=\s*titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value;?/)
+assert.match(code, /const\s+formInputsContainValues\s*=\s*(titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value|titleInput\.value\s*!==\s*null\s*\|\|\s*dateInput\.value\s*!==\s*null\s*\|\|\s*descriptionInput\.value\s*!==\s*null)\;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
index 54d338b05de..b9c7454b3f2 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
@@ -14,25 +14,25 @@ Create an `if` statement to check if `formInputsContainValues` is true. If `form
 You should create an `if` statement with the condition `formInputsContainValues`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{/)
 ```
 
 The `if` block of your `if` statement should contain `confirmCloseDialog.showModal();`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `reset()` function in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{\s*reset\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{\s*reset\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
index 907d861c83c..91c713f2626 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
@@ -16,7 +16,7 @@ Use arrow syntax to create an `addOrUpdateTask` function. Then move the `dataArr
 You should use `const` and arrow syntax to create an `addOrUpdateTask` function.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should move the `dataArrIndex` variable into the `addOrUpdateTask` function.
@@ -31,7 +31,7 @@ You should move the `taskObj` object into the `addOrUpdateTask` function.
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?/)
 ```
 
-You should move the `if` statement with the condition `dataArrIndex === 1` into your `addOrUpdateTask` function.
+You should move the `if` statement with the condition `dataArrIndex === -1` into your `addOrUpdateTask` function.
 
 ```js
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s*===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?\s*if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\)\s*;?\s*\}\s*\}\s*;?/)
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
index 6eda234e6ec..bb563490ef0 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
@@ -14,13 +14,13 @@ Use arrow syntax to create an `updateTaskContainer` function. Then move the `tas
 You should use `const` and arrow syntax to create a `updateTaskContainer` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 You should move `taskData.forEach()` and its content into the `updateTaskContainer()` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\{\s*id,\s*title,\s*date,\s*description\s*\}\)\s*=>\s*{\s*\(tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\)\s*}\s*\);?\s*\};?/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\s*\{\s*id,\s*title,\s*date,\s*description\s*\}\s*\)\s*=>\s*{\s*\(\s*tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\s*\)\s*}\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
index 12bd22aa788..4406efab0fd 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
@@ -14,13 +14,13 @@ Inside the `addOrUpdateTask` function, call the `updateTaskContainer` and `reset
 You should call the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\)\s*/)
+assert.match(code, /updateTaskContainer\(\s*\)\s*/)
 ```
 
 You should call the `reset` function after calling the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\);?\s*reset\(\);?\s*/)
+assert.match(code, /updateTaskContainer\(\s*\);?\s*reset\(\s*\);?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
index c0c5dac3528..b3b8266efe7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
@@ -14,7 +14,7 @@ Now remove the `reset()` call inside the `taskForm` submit event listener and ca
 You should remove `reset()` and call `addOrUpdateTask()`.
 
 ```js
-assert.match(code, /addOrUpdateTask\(\)/)
+assert.match(code, /addOrUpdateTask\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
index 865beabe3da..168ee4079c1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
@@ -13,16 +13,16 @@ To enable editing and deleting for each task, add an `onclick` attribute to both
 
 # --hints--
 
-You should add `onclick="editTask(this)"` as the first attribute of the edit button.
+You should add `onclick="editTask(this)"` to your edit button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")editTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3\s*>Edit<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')editTask\(\s*this\s*\)\1)[^>]*>Edit<\/button>/);
 ```
 
-You should add `onclick="deleteTask(this)"` as the first attribute of the delete button.
+You should add `onclick="deleteTask(this)"` to your delete button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")deleteTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3>Delete<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')deleteTask\(\s*this\s*\)\1)[^>]*>Delete<\/button>/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
index 46ca408cd5a..8d257c3b8a5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable and set its value using the `findIndex()` metho
 You should not alter the `deleteTask` function.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
index c740b749330..250fd19fd27 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
@@ -30,7 +30,7 @@ Use the `remove()` method to remove the `parentElement` of the `buttonEl` from t
 You should use the `remove()` method to remove the parent element of `buttonEl`.
 
 ```js
-assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\);?/)
+assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\s*\);?/)
 ```
 
 You should use `splice()` on the `taskData` array.
@@ -42,13 +42,13 @@ assert.match(deleteTask.toString(), /taskData\.splice\(/)
 The first argument of your `splice()` method should be `dataArrIndex`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex/)
 ```
 
 The second argument of your `splice()` method should be `1`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex,\s*1\);?/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex,\s*1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
index 290f4f7ba53..f43439d579a 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable. For its value, utilize the `findIndex()` metho
 You should not alter the `editTask` function.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
index 0981562a23c..4fbbf89aecc 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
@@ -14,7 +14,7 @@ Use square bracket notation to retrieve the task to be edited from the `taskData
 You should assign `taskData[dataArrIndex]` to `currentTask`.
 
 ```js
-assert.match(code, /currentTask\s*=\s*taskData\[dataArrIndex\];?/)
+assert.match(code, /currentTask\s*=\s*taskData\s*\[\s*dataArrIndex\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
index 21433f5cc1b..a23050ce8a5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
@@ -14,13 +14,13 @@ At this point, editing a task won't reflect when you submit the task. To make th
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 Your `else` block should have the code `taskData[dataArrIndex] = taskObj`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*taskData\[dataArrIndex\]\s*=\s*taskObj;?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*taskData\s*\[\s*dataArrIndex\s*\]\s*=\s*taskObj;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
index 0643a80e72a..e30fd7ffa80 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
@@ -26,13 +26,13 @@ After that, open your browser console and go to the `Applications` tab, select `
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 Your `localStorage.setItem()` should have a value of `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*myTaskArr\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*myTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
index 5d4b926558a..ba39889251e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
@@ -16,13 +16,13 @@ To resolve the issue, wrap the data you're saving in the `JSON.stringify()` meth
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 You should wrap `JSON.stringify()` around `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*JSON\.stringify\(myTaskArr\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*JSON\.stringify\(\s*myTaskArr\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
index 7908ce2fef2..bd5f67cbbc3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
@@ -16,13 +16,13 @@ Use the `getItem()` method to retrieve the `myTaskArr` array and assign it to th
 You should use `const` to create a `getTaskArr` variable and assign `localStorage.getItem("data")` to it.
 
 ```js
-assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(('|")data\1\);?/)
+assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\1\s*\);?/)
 ```
 
 You should log the `getTaskArr` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArr\);?/)
+assert.match(code, /console\.log\(\s*getTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
index f42992ca957..aad78d1f885 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
@@ -18,13 +18,13 @@ Check the console to see the difference between `getTaskArr` and `getTaskObj`.
 You should use `const` to create a `getTaskArrObj` variable and assign it to `JSON.parse(localStorage.getItem('data'));`.
 
 ```js
-assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\);?/)
+assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\);?/)
 ```
 
 You should log the `getTaskArrObj` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArrObj\);?/)
+assert.match(code, /console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
index e895038fe85..80856ffb888 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
@@ -16,7 +16,7 @@ Remove the `data` item from local storage and open the console to observe the re
 You should use `localStorage.removeItem()` to remove the `data` item from the browser's local storage.
 
 ```js
-assert.match(code, /localStorage\.removeItem\(('|")data\1\);?/)
+assert.match(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
index 275a66c6a66..98834aea6de 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
@@ -16,13 +16,13 @@ Remove `localStorage.removeItem()` and use `localStorage.clear()` instead. You d
 You should remove `localStorage.removeItem("data")`.
 
 ```js
-assert.notMatch(code, /localStorage\.removeItem\(('|")data\1\);/)
+assert.notMatch(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);/)
 ```
 
 You should remove everything from the browser `local storage` with `localStorage.clear()`.
 
 ```js
-assert.match(code, /localStorage\.clear\(\);?/)
+assert.match(code, /localStorage\.clear\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
index 67b8af37eea..632d87e4f30 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
@@ -14,7 +14,7 @@ Remove the `myTaskArr` array and all of the code for `localStorage` because you
 You should remove `myTaskArr` and all the code related to `localStorage` that you've just learned.
 
 ```js
-assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s"Walk\s*the\s*Dog",\s*date:\s*"22-04-2022"\s*\},\s*\{\s*task:\s"Read\s*some\s*books",\s*date:\s*"02-11-2023"\s*\},\s*\{\s*task:\s"Watch\s*football",\s*date:\s*"10-08-2021"\s*\},\s*\];?\s*localStorage\.setItem\("data", JSON\.stringify\(myTaskArr\)\);\s*localStorage\.clear\(\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\("data"\)\s*console\.log\(getTaskArr\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\("data"\)\);?\s*console\.log\(getTaskArrObj\);?/)
+assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s('|")Walk\s*the\s*Dog\1,\s*date:\s*('|")22-04-2022\2\s*\},\s*\{\s*task:\s('|")Read\s*some\s*books\3,\s*date:\s*('|")02-11-2023\4\s*\},\s*\{\s*task:\s('|")Watch\s*football\5,\s*date:\s*('|")10-08-2021\6\s*\},\s*\]\s*;?\s*localStorage\.setItem\(('|")data\7, JSON\.stringify\(\s*myTaskArr\s*\)\s*\);\s*localStorage\.clear\(\s*\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\8\s*\)\s*console\.log\(\s*getTaskArr\s*\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\9\s*\)\s*\);?\s*console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
@@ -316,7 +316,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -346,7 +346,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
index c15c30f7c6d..bbfcaf55174 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
@@ -24,13 +24,13 @@ assert.match(code, /localStorage\.setItem\(/)
 You should pass in `"data"` as the first argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
index 1865b756881..e3afbeebb6e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
@@ -24,14 +24,14 @@ You should pass in `"data"` as the first argument of your `localStorage.setItem(
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
index 4f14a25ad02..a57bc74d2b1 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
@@ -16,7 +16,7 @@ Set `taskData` to the retrieval of `data` from local storage **or** an empty arr
 You should set the `taskData` variable to `JSON.parse(localStorage.getItem("data")) || [];`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\)\s*\|\|\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\)\s*\|\|\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -321,7 +321,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -352,7 +352,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
index b8796f1659c..cf46c73b3e7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
@@ -20,13 +20,13 @@ With that, you've completed this project.
 You should create an `if` statement with `(taskData.length)` as the condition. As a reminder, `0` is a falsy value.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*/)
 ```
 
 You should call the `updateTaskContainer` function in your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*updateTaskContainer\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*updateTaskContainer\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
index 8debf53e5b2..3455bc30d86 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
@@ -20,7 +20,7 @@ console.log(Date.now()); // 1628586800000
 You should attach `-${Date.now()}` to the existing value of the `id` key. Don't forget it needs to be inside the template string.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
index 337dace3e5b..f21fcdc5ab2 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
@@ -1,32 +1,18 @@
 ---
 id: 63e02a333354343b595d64ca
-title: 步骤 16
+title: Step 15
 challengeType: 0
-dashedName: step-16
+dashedName: step-15
 ---
 
 # --description--
 
-Now that you have tested the `Object.freeze()` method, you can delete those two lines of code from the last lesson.
-
 The next step is to access the key called `sport` from the `myFavoriteFootballTeam` object and assign it to a new `const` variable called `sport`.
 
 Remember you can use dot notation for this.
 
 # --hints--
 
-You should remove your assignment of the `USA` string to `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /myFavoriteFootballTeam\.team\s*=\s*('|"|`)USA\1\s*/);
-```
-
-You should remove your `console.log` for `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /console\.log\(\s*myFavoriteFootballTeam\.team\s*\)/);
-```
-
 You should use `const` to declare a `sport` variable.
 
 ```js
@@ -462,8 +448,6 @@ Object.freeze(myFavoriteFootballTeam);
 
 --fcc-editable-region--
 
-myFavoriteFootballTeam.team = "USA";
-console.log(myFavoriteFootballTeam.team);
 
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
index 9815fa204b9..d9520c64e56 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
@@ -1,8 +1,8 @@
 ---
 id: 63e0334b7a24bd3c96aca4de
-title: Step 17
+title: Step 16
 challengeType: 0
-dashedName: step-17
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
index 8d5e7208849..e556c5c05e3 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e036373fc9173d284e165a
-title: 步骤 18
+title: Step 17
 challengeType: 0
-dashedName: step-18
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
index 7fa2996bcb7..2a8ea3b0d0b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
@@ -1,8 +1,8 @@
 ---
 id: 63e03b86008bbb3e1c3de846
-title: 步骤 19
+title: Step 18
 challengeType: 0
-dashedName: step-19
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
index b677656d1b7..32ae955337d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
@@ -1,8 +1,8 @@
 ---
 id: 63e042661ad2663f0d468740
-title: 步骤 20
+title: Step 19
 challengeType: 0
-dashedName: step-20
+dashedName: step-19
 ---
 
 # --description--
@@ -15,7 +15,7 @@ Use object destructuring to access the `coachName` value.
 
 ```js
 
-assert.match(code, /const\s*{\s*coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach\s*/)
+assert.match(code, /const\s*{\s*(coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach|headCoach\s*:\s*{\s*coachName\s*}\s*}\s*=\s*myFavoriteFootballTeam)\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
index 4df611199d4..ed536a4b70e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
@@ -1,8 +1,8 @@
 ---
 id: 63e050bf935ac341b88326d6
-title: 步骤21
+title: Step 20
 challengeType: 0
-dashedName: step-21
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
index 1df384da534..3562608e3f9 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05557016dfd45ea49152c
-title: 步骤 22
+title: Step 21
 challengeType: 0
-dashedName: step-22
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
index 390857e9fb9..70772e4cba9 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05c00b615bb46ac87273a
-title: 步骤-23
+title: Step 22
 challengeType: 0
-dashedName: step-23
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
index 6a0ab3b04c4..862d6c0fd77 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
@@ -1,8 +1,8 @@
 ---
 id: 63e060df21bca347b2d2b374
-title: 步骤 24
+title: Step 23
 challengeType: 0
-dashedName: step-24
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
index c52e96459f7..5ea194d88aa 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e062d6090ebb486a4eda3a
-title: 步骤 25
+title: Step 24
 challengeType: 0
-dashedName: step-25
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
index e9fbb417b32..5cd7ea1d6e4 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
@@ -1,8 +1,8 @@
 ---
 id: 63e949b8327aa2aca2ca8eac
-title: 步骤 26
+title: Step 25
 challengeType: 0
-dashedName: step-26
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
index 68527a2cecc..b13000896fc 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
@@ -1,8 +1,8 @@
 ---
 id: 63e94dae6dcedbad73f2f6ee
-title: 步骤 27
+title: Step 26
 challengeType: 0
-dashedName: step-27
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
index 77d044f5828..dbeb80c7a4c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
@@ -1,8 +1,8 @@
 ---
 id: 63e954321b0a77ae4f6d9650
-title: 第 28 步
+title: Step 27
 challengeType: 0
-dashedName: step-28
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
index 80db5c38501..3912e0e6228 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95a45dce95baf41dd4f78
-title: 步骤 29
+title: Step 28
 challengeType: 0
-dashedName: step-29
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
index 4116e33fdbb..9a21ae45f28 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95e39860dc5b01ebe9be0
-title: 第 30 步
+title: Step 29
 challengeType: 0
-dashedName: step-30
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
index bb28d194ecd..e037852b3bc 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9667c881b61b1e338d276
-title: 步骤 31
+title: Step 30
 challengeType: 0
-dashedName: step-31
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
index cb4d828be3c..20e68b6415e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96938d2a347b2734a1587
-title: 步骤 32
+title: Step 31
 challengeType: 0
-dashedName: step-32
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
index fb5688eae04..eb225b3116c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96eb94c97b6b31ee50f63
-title: 步骤 33
+title: Step 32
 challengeType: 0
-dashedName: step-33
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
index 7de2fe3110d..401f8fcb289 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9718d7d490bb3940d5a0a
-title: 步骤 34
+title: Step 33
 challengeType: 0
-dashedName: step-34
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
index 5cda934eb7a..e2cf0d8bbea 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9737f686c76b4078a60f4
-title: 步骤 35
+title: Step 34
 challengeType: 0
-dashedName: step-35
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
index 56d8bac39e5..0544b4bdd11 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28972973504e7bb58b0b3
-title: 步骤 36
+title: Step 35
 challengeType: 0
-dashedName: step-36
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
index 2977df857ff..91426574c6f 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28ef082d771e8bf71f94a
-title: 步骤 37
+title: Step 36
 challengeType: 0
-dashedName: step-37
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
index 0da9343ba5a..9ad6aab3caa 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
@@ -1,8 +1,8 @@
 ---
 id: 63f293c804d6f9e9a83ca4c5
-title: 步骤 38
+title: Step 37
 challengeType: 0
-dashedName: step-38
+dashedName: step-37
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Open the console, and make a selection from the teammates dropdown menu. You sho
 You should add a `console.log` with the value of `e.target.value`.
 
 ```js
-assert.match(code, /console\.log\s*\(e\.target\.value\)\s*/)
+assert.match(code, /console\.log\s*\(\s*e\.target\.value\s*\)\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
index 2d9eb1025eb..f95cf6e5d4b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29804e3ec00ea6fab1ec4
-title: 步骤 39
+title: Step 38
 challengeType: 0
-dashedName: step-39
+dashedName: step-38
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Inside the callback function, access the `innerHTML` property of the `playerCard
 You should not have the `console.log` statement in your code.
 
 ```js
-assert.notMatch(code, /\s*console\.log\(e\.target\.value\)/);
+assert.notMatch(code, /\s*console\.log\(\s*e\.target\.value\s*\)/);
 ```
 
 You should access the `innerHTML` property of the `playerCards` element.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
index 4a5f099366e..134d1331364 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29ce62aea65eb041758c8
-title: 步骤 40
+title: Step 39
 challengeType: 0
-dashedName: step-40
+dashedName: step-39
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /switch\s*\(\s*e\.target\.value\s*\)/);
 Your `switch` statement should be empty.
 
 ```js
-assert.match(code, /\s*switch\s*\(e\.target\.value\)\s*{\s*}/);
+assert.match(code, /\s*switch\s*\(\s*e\.target\.value\s*\)\s*{\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
index 8720c6f8387..a3caf074b5c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a0a860790eebe61bf908
-title: 步骤 41
+title: Step 40
 challengeType: 0
-dashedName: step-41
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
index fe37fee5bd4..303dace84dc 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a4a8087e6dec8ec47f16
-title: 步骤 44
+title: Step 43
 challengeType: 0
-dashedName: step-44
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
index 915c906aff7..b66de0298ec 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a5f09a785aed155c0a56
-title: 步骤 45
+title: Step 44
 challengeType: 0
-dashedName: step-45
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
index fdd58ffd60c..f6cb13c7bc5 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a8e14fb388edd3242527
-title: 步骤 46
+title: Step 45
 challengeType: 0
-dashedName: step-46
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
index 557a73c7f5e..3ff1f2396c8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2aa36fcdc63ee4e18fc37
-title: 步骤 47
+title: Step 46
 challengeType: 0
-dashedName: step-47
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
index 8c6db69f6fa..0543e8d3b98 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2ab4f6c52c5eec6d68de4
-title: 步骤 48
+title: Step 47
 challengeType: 0
-dashedName: step-48
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
index 2551955ef4b..6cd48c0e9a8 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
@@ -1,8 +1,8 @@
 ---
 id: 641fc88d8fa7127f76e0324f
-title: 步骤 42
+title: Step 41
 challengeType: 0
-dashedName: step-42
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
index 389fbd01e76..11c8298ac82 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
@@ -1,8 +1,8 @@
 ---
 id: 641fcfd468185384ac218b7d
-title: 第 43 步
+title: Step 42
 challengeType: 0
-dashedName: step-43
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
index a7d3e4e0f6a..39dc45db82e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-After alerting the user if the number input is empty of the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
+After alerting the user if the number input is empty or the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
 
 Add the `return` keyword after `alert()`.
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
index c0f02aef4e2..d0daa39836b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
@@ -24,7 +24,6 @@ Use the `.reverse()` method to reverse the order of the `remainders` array, and
 You should use the `.reverse()` method on the `remainders` array.
 
 ```js
-console.log(String(decimalToBinary))
 assert.match(String(decimalToBinary), /remainders\.reverse\(\s*\)/);
 ```
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
index 4ab1d1483f2..09fe3159f58 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
@@ -31,7 +31,7 @@ assert.notMatch(String(decimalToBinary), /else\s+if\s*\([\s\S]+\)/);
 Your `decimalToBinary()` function should have an `if` statement that checks if `input` is equal to `0` or `1`.
 
 ```js
-assert.match(String(decimalToBinary), /if\s*\(input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
+assert.match(String(decimalToBinary), /if\s*\(\s*input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(\s*input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
 ```
 
 If input is equal to `0` or `1`, your `decimalToBinary()` function should return `String(input)`.
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
index 5ec685ebec5..c88200e6f0b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
@@ -44,7 +44,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1000` as the second argument to the `setTimeout` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
index 98abf9da188..310b186ef7c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
@@ -48,7 +48,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
index e87a987bdc3..a59df647100 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
@@ -46,7 +46,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
index 5a0a568e57f..f97af0e7fc2 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the `id` attribute to the `inputVal`
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
index 4f361fec6a3..f7bfd05f58c 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the text of the paragraph element to
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
index d8994fbbc70..dbe744bee64 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `showMsgDelay` property of the c
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)showMsgDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)showMsgDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
index b2b6d8ca0d5..12f085db324 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
@@ -18,7 +18,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
index 3add20607be..1f270189168 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
@@ -27,7 +27,7 @@ You should set the `textContent` property of the targeted element equal to the `
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\[\s*('|"|`)\s*msg\s*\1\s*\]/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\s*\[\s*('|"|`)\s*msg\s*\1\s*\]/
 );
 ```
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
index 4d374748dda..a1c40c87273 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `removeElDelay` property of the
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)removeElDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)removeElDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
index 09126a50235..2b73ea3baad 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
@@ -16,7 +16,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.lengthOf(
   String(showAnimation).match(
-    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
+    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
   ),
   2
 );
@@ -27,7 +27,7 @@ You should chain the `.remove()` method to the `.getElementById()` method.
 ```js
 assert.match(
   String(showAnimation),
-  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
+  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
 );
 ```
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
index 52aaba0e2d7..5598c54fb5e 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
@@ -18,7 +18,7 @@ You should set the `textContent` property of `result` equal to calling `decimalT
 ```js
 assert.match(
   String(showAnimation),
-  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\[('|"|`)textContent\1\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
+  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\s*\[\s*('|"|`)textContent\1\s*\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
 );
 ```
 
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
index 27806142c43..c32a4ebab01 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
@@ -9,9 +9,9 @@ dashedName: step-5
 
 Back in your event listener, you need to update the text of the `result` element.
 
-Use a ternary operator to update the text of the `result` element after the `if` statement. Check the truthiness of calling `isSpam()` on the value of the `messageInput` element. If true, set the text to `Oh no! This looks like a spam message.`. Otherwise, set the text to `This message does not seem to contain any spam.`
+After the `if` statement, use a ternary operator to check the truthiness of calling `isSpam()` with `messageInput.value` as the argument. If true, set the `textContent` property on the `result` element to `Oh no! This looks like a spam message.`. Otherwise, set it to `This message does not seem to contain any spam.`
 
-Then set the `messageInput` element's value to an empty string.
+Then set the `messageInput` element's `value` property to an empty string.
 
 # --hints--
 
@@ -21,10 +21,10 @@ You should use the assignment operator to set the `textContent` property of the
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*/)
 ```
 
-You should assign the `isSpam()` function call to `result.textContent`.
+You should call the `isSpam()` function after the assignment operator `=` and before the `?` ternary operator.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(.*\)\s*\?/)
 ```
 
 You should use ternary syntax to check the truthiness of `isSpam(messageInput.value)`.
@@ -45,10 +45,10 @@ The falsy expression of your ternary should set the `textContent` property of th
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*/);
 ```
 
-After your ternary, set the `value` of `messageInput` to an empty string.
+After your ternary, set the `value` property on the `messageInput` element to an empty string.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5\s*;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
index d914215a051..2c57055cf1b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
@@ -24,13 +24,13 @@ assert.match(code, /const\s+currentDateParagraph\s+=/);
 You should use `document.getElementById()` to get the `#current-date` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)current-date\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)current-date\1\s*\)/);
 ```
 
 You should assign the `#current-date` element to your `currentDateParagraph` variable.
 
 ```js
-assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(('|"|`)current-date\1\)/g));
+assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(\s*('|"|`)current-date\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
index b8d172f157e..47012054dfd 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+dateOptionsSelectElement\s+=/);
 You should use `document.getElementById()` to get the `#date-options` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)date-options\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)date-options\1\s*\)/);
 ```
 
 You should assign the `#date-options` element to your `dateOptionsSelectElement` variable.
 
 ```js
-assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(('|"|`)date-options\1\)/g));
+assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(\s*('|"|`)date-options\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
index 5ea795770cb..cab45c23b6b 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
@@ -32,7 +32,7 @@ assert.match(code, /const\s+date\s+=/);
 You should assign a `Date` object to your `date` variable with `new Date()`.
 
 ```js
-assert(code.match(/const\s+date\s+=\s+new\s+Date\(\)/g));
+assert(code.match(/const\s+date\s+=\s+new\s+Date\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
index 268d0b62803..f9b46558d65 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
@@ -30,7 +30,7 @@ assert.match(code, /const\s+day\s+=/);
 You should assign the `date.getDate()` to your `day` variable.
 
 ```js
-assert(code.match(/const\s+day\s+=\s+date\.getDate\(\)/g));
+assert(code.match(/const\s+day\s+=\s+date\.getDate\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
index be928d63fba..e72ca973c8d 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+month\s+=/);
 You should assign the `date.getMonth() + 1` to your `month` variable.
 
 ```js
-assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\)\s*\+\s*1/g));
+assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\s*\)\s*\+\s*1/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
index b0973ccd6cf..0fa8929eff9 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+year\s+=/);
 You should assign the `date.getFullYear()` to your `year` variable.
 
 ```js
-assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\)/g));
+assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
index ea90dea4d55..9559884e2fc 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+hours\s+=/);
 You should assign the `date.getHours()` to your `hours` variable.
 
 ```js
-assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\)/g));
+assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
index 6f2ec3f90e0..0e786771069 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+minutes\s+=/);
 You should assign the `date.getMinutes()` to your `minutes` variable.
 
 ```js
-assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\)/g));
+assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
index 82529026643..15928ab93b2 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
@@ -16,7 +16,7 @@ Open up the console and you should see the date printed out.
 You should have a `console.log(formattedDate)` line in your code.
 
 ```js
-assert.match(code, /console\.log\(formattedDate\)/);
+assert.match(code, /console\.log\(\s*formattedDate\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
index 65b0dde9313..30067328ece 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
@@ -22,7 +22,7 @@ assert(code.match(/currentDateParagraph\.textContent\s*=\s*formattedDate/g));
 You should not have a `console.log(formattedDate);` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(formattedDate\);/);
+assert.notMatch(code, /console\.log\(\s*formattedDate\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
index 189a1a36859..3d252a890e7 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
@@ -15,11 +15,17 @@ element.addEventListener("change", () => {
 });
 ```
 
-Chain the `addEventListener` method to `dateOptionsSelectElement` where the first argument is `change` and the second argument is an empty arrow function.
+Attach the `addEventListener` method to the `dateOptionsSelectElement`. The first argument of the event listener should be the string `change` and the second argument should be an empty arrow function.
 
 # --hints--
 
-You should use the `addEventListener` method to add a `change` event listener to `dateOptionsSelectElement`.
+You should attach the `addEventListener` method to the `dateOptionsSelectElement`.
+
+```js
+assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(/g));
+```
+
+Your event listener should listen for a `change` event.
 
 ```js
 assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(\s*('|")change\1/g));
diff --git a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
index 614049505ef..9b2820376de 100644
--- a/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
+++ b/curriculum/challenges/chinese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
@@ -22,7 +22,7 @@ Chain the `.reverse()` method to the end of `.split()` method.
 You should use the `.reverse()` method to reverse the order of the array returned by `.split()`.
 
 ```js
-assert(code.match(/\.reverse\(\)/g));
+assert(code.match(/\.reverse\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/chinese/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md b/curriculum/challenges/chinese/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
index a721563d96d..1f1a60542e3 100644
--- a/curriculum/challenges/chinese/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
+++ b/curriculum/challenges/chinese/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
@@ -109,7 +109,6 @@ assert(getCorrectStyle()?.textAlign === 'center');
 # --seed--
 
 ## --seed-contents--
-
 ```css
 ```
 
diff --git a/curriculum/challenges/chinese/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md b/curriculum/challenges/chinese/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
index 6480354b9f3..cf7e94d0967 100644
--- a/curriculum/challenges/chinese/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
+++ b/curriculum/challenges/chinese/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
@@ -29,4 +29,4 @@ They are outdated technologies.
 
 ## --video-solution--
 
-1
+2
diff --git a/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md b/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md
index a837a683f26..1439626a30d 100644
--- a/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md
+++ b/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md
@@ -1,38 +1,38 @@
 ---
 id: 647e21598acb466c97ccbee1
-title: 'Challenge Project - Develop Branching and Looping Structures in C#'
+title: '挑战项目 - 在 C# 中开发分支和循环结构'
 challengeType: 19
 dashedName: challenge-project-develop-branching-and-looping-structures-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+这个挑战将有一部分在 Microsoft Learn 平台上完成。 请按照如下说明来完成挑战：
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/</a> and complete all the tasks for the "Challenge Project - Develop Branching and Looping Structures in C#" module. This is **required** to earn the "Add Logic to C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. 跳转到 <a href="https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/</a>，然后完成“挑战项目 - 在 C# 中开发分支和循环结构”模块的所有任务。 这是在 Microsoft Learn 上获得“向 C# 控制台应用程序添加逻辑”的奖杯以及参加认证考试所**必需**的。
+1. 完成后，返回并正确回答下面的问题。
 
-# --assignment--
+# --任务--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/" target="_blank" rel="noreferrer">Develop Branching and Looping Structures in C#</a> challenge project on Microsoft Learn. Then, answer the question below.
+在 Microsoft Learn 上完成 <a href="https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/" target="_blank" rel="noreferrer">在 C# 中开发分支和循环结构</a> 的挑战项目。 然后，回答下面的问题。
 
 # --question--
 
 ## --text--
 
-A developer needs to create an iteration statement. Under what condition is a `while` statement a better choice than a `do` statement?
+开发人员需要创建迭代语句。 在什么条件下 `while` 语句比 `do` 语句更好？
 
 ## --answers--
 
-When the expression values evaluated by the iteration statement are unknown prior to the iteration code block.
+当迭代语句评估的表达式值在迭代代码块之前未知时。
 
 ---
 
-When the expression values evaluated by the iteration statement are known prior to the iteration code block.
+当迭代语句评估的表达式值在迭代代码块之前已知时。
 
 ---
 
-When the developer creates nested `do` or `while` loops.
+当开发人员创建嵌套的 `do` 或者 `while` 循环时。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md b/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md
index f1d60edd59a..a1d0f84a30f 100644
--- a/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md
+++ b/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md
@@ -1,20 +1,20 @@
 ---
 id: 647e21708acb466c97ccbee3
-title: 'Evaluate Boolean Expressions to Make Decisions in C#'
+title: '在 C# 中评估布尔表达式以做出决策'
 challengeType: 19
 dashedName: evaluate-boolean-expressions-to-make-decisions-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+这个挑战将有一部分在 Microsoft Learn 平台上完成。 请按照如下说明来完成挑战：
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/</a> and complete all the tasks for the "Evaluate Boolean Expressions to Make Decisions in C#" module. This is **required** to earn the "Add Logic to C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. 跳转到 <a href="https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/</a>，然后完成“在 C# 中评估布尔表达式以做出决策”模块的所有任务。 这是在 Microsoft Learn 上获得“向 C# 控制台应用程序添加逻辑”的奖杯以及参加认证考试所**必需**的。
+1. 完成后，返回并正确回答下面的问题。
 
-# --assignment--
+# --任务--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/" target="_blank" rel="noreferrer">Evaluate Boolean Expressions to Make Decisions in C#</a> module on Microsoft Learn. Then, answer the question below.
+在 Microsoft Learn 上完成 <a href="https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/" target="_blank" rel="noreferrer">在 C# 中评估布尔表达式以做出决策</a> 模块。 然后，回答下面的问题。
 
 # --question--
 
diff --git a/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md b/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md
index 84642b155e8..3d5331b1d31 100644
--- a/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md
+++ b/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647f87dc07d29547b3bee1bf
-title: 'Trophy - Create and Run Simple C# Console Applications'
+title: '奖杯 - 创建和运行简单的 C# 控制台应用程序'
 challengeType: 18
 dashedName: trophy-create-and-run-simple-c-sharp-console-applications
 msTrophyId: learn.wwl.get-started-c-sharp-part-2.trophy
@@ -8,6 +8,6 @@ msTrophyId: learn.wwl.get-started-c-sharp-part-2.trophy
 
 # --description--
 
-Now that you've completed all of the "Create and Run Simple C# Console Applications" challenges, you should have earned the trophy for it on the Microsoft Learn platform. If you don't see this trophy when viewing <a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">your achievements page</a>, you have not completed all the tasks and your trophy cannot be verified.
+现在你已经完成了所有"创建并运行简单的 C# 控制台应用程序"的挑战。你应该已经在 Microsoft Learn 平台上获得了奖杯。 如果你在查看 <a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">你的成就</a> 页面时没有看到该奖杯，那你尚未完成所有任务，奖杯也无法被认证。
 
-Link your Microsoft username to your freeCodeCamp account and click the "Verify Trophy" button below to complete the challenge. This trophy is **required** to qualify for the certification exam.
+将你的 Microsoft 用户名链接到你的 freeCodeCamp 账户，然后点击下面的“验证奖杯”按钮来完成挑战。 这个奖杯是参加认证考试所**必需**的。
diff --git a/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/challenge-project-create-a-mini-game.md b/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/challenge-project-create-a-mini-game.md
index 18794d3b5af..f327a31c726 100644
--- a/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/challenge-project-create-a-mini-game.md
+++ b/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/challenge-project-create-a-mini-game.md
@@ -1,26 +1,26 @@
 ---
 id: 647e22338acb466c97ccbeed
-title: Challenge Project - Create a Mini-Game
+title: 挑战项目 - 创建小游戏
 challengeType: 19
 dashedName: challenge-project-create-a-mini-game
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+这个挑战将有一部分在 Microsoft Learn 平台上完成。 请按照如下说明来完成挑战：
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/</a> and complete all the tasks for the "Challenge Project - Create a Mini-Game" module. This is **required** to earn the "Create Methods in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. 跳转到 <a href="https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/</a>，然后完成“挑战项目 - 创建小游戏”模块的所有任务。 这是在 Microsoft Learn 上获得“在 C# 控制台应用程序中创建方法”的奖杯以及参加认证考试所**必需**的。
+1. 完成后，返回并正确回答下面的问题。
 
-# --assignment--
+# --任务--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/" target="_blank" rel="noreferrer">Create a Mini-Game</a> challenge project on Microsoft Learn. Then, answer the question below.
+在 Microsoft Learn 上完成 <a href="https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/" target="_blank" rel="noreferrer">创建小游戏</a> 的挑战项目。 然后，回答下面的问题。
 
 # --question--
 
 ## --text--
 
-A developer wants to create a method that returns a value in an array. Which of the following options would be a good choice for a method signature?
+开发人员想要创建一个返回数组中元素值的方法。 下列哪项是一个方法签名的不错选择？
 
 ## --answers--
 
diff --git a/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md b/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md
index 33d1914183f..f84dec4961a 100644
--- a/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md
+++ b/curriculum/challenges/chinese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md
@@ -1,18 +1,18 @@
 ---
 id: 647e22958acb466c97ccbef4
-title: 'Guided Project - Debug and Handle Exceptions in a C# Console Application Using Visual Studio Code'
+title: '引导项目 - 使用 VS Code 在 C# 控制台应用程序中调试和处理异常'
 challengeType: 19
 dashedName: guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+这个挑战将有一部分在 Microsoft Learn 平台上完成。 请按照如下说明来完成挑战：
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/</a> and complete all the tasks for the "Guided Project - Debug and Handle Exceptions in a C# Console Application Using Visual Studio Code" module. This is **required** to earn the "Debug C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. 跳转到 <a href="https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/</a>，然后完成“引导项目 - 使用 VS Code 在 C# 控制台应用程序中调试和处理异常”模块的所有任务。 这是在 Microsoft Learn 上获得“调试 C# 控制台应用程序”的奖杯以及参加认证考试所**必需**的。
+1. 完成后，返回并正确回答下面的问题。
 
-# --assignment--
+# --任务--
 
 Complete the <a href="https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/" target="_blank" rel="noreferrer">Debug and Handle Exceptions in a C# Console Application Using Visual Studio Code</a> guided project on Microsoft Learn. Then, answer the question below.
 
diff --git a/curriculum/challenges/chinese/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md b/curriculum/challenges/chinese/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
index fa5b427fdc5..857d52d4c51 100644
--- a/curriculum/challenges/chinese/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
+++ b/curriculum/challenges/chinese/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
@@ -1,5 +1,5 @@
 ---
-id: 657e0d0037192f3d9e3d5417 
+id: 657e0d0037192f3d9e3d5417
 title: Task 128
 challengeType: 22
 dashedName: task-128
diff --git a/curriculum/challenges/chinese/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md b/curriculum/challenges/chinese/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
index f8949309ce8..8b4e002d454 100644
--- a/curriculum/challenges/chinese/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
+++ b/curriculum/challenges/chinese/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
@@ -13,7 +13,7 @@ Bob: Alright, team. This is Alice's first day with _ , so please let _ introduce
 -->
 # --description--
 
-You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sould more natural. Listen for the object pronouns Bob uses in this audio.
+You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sound more natural. Listen for the object pronouns Bob uses in this audio.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/chinese/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md b/curriculum/challenges/chinese/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
index 51339ddf572..ad8af6fee00 100644
--- a/curriculum/challenges/chinese/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
+++ b/curriculum/challenges/chinese/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
@@ -26,13 +26,13 @@ The algorithm uses this linear congruential generator from Microsoft C:
   <li>Seed the RNG with the number of the deal.
   </li><li>Create an array of 52 cards: Ace of Clubs, Ace of Diamonds, Ace of Hearts, Ace of Spades, 2 of Clubs, 2 of Diamonds, and so on through the ranks: Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King. 数组索引为 0 到 51，梅花 A 为 0，黑桃王为 51。</li>
   <li>直到数组为空：</li>
-  <li>在索引 ≡ 下一个随机数（mod 数组长度）处选择一张随机卡片。</li>
     <ul>
+      <li>Choose a random card at <i>index</i> ≡ <i>next random number</i> (mod <i>array length</i>).</li>
       <li>Swap this random card with the last card of the array.</li>
-      <li>从阵列中移除这张随机卡。 （数组长度减 1。）</li>
-      <li>处理这张随机牌。</li>
+      <li>Remove this random card from the array. (Array length goes down by 1.)</li>
+      <li>Deal this random card.</li>
     </ul>
-  <li>处理所有 52 张牌，面朝上，跨越 8 列。 前 8 张牌分 8 列，接下来的 8 张牌排在前 8 张牌上，以此类推。</li>
+  <li>Deal all 52 cards, face up, across 8 columns. The first 8 cards go in 8 columns, the next 8 cards go on the first 8 cards, and so on.</li>
 </ol>
 
 **Example:**
diff --git a/curriculum/challenges/chinese/22-rosetta-code/rosetta-code-challenges/execute-brain.md b/curriculum/challenges/chinese/22-rosetta-code/rosetta-code-challenges/execute-brain.md
index a0c57f75f5b..62a7d597284 100644
--- a/curriculum/challenges/chinese/22-rosetta-code/rosetta-code-challenges/execute-brain.md
+++ b/curriculum/challenges/chinese/22-rosetta-code/rosetta-code-challenges/execute-brain.md
@@ -1,6 +1,6 @@
 ---
 id: 59e0a8df964e4540d5abe599
-title: 执行脑 ****
+title: Execute Brain****
 challengeType: 1
 forumTopicId: 302261
 dashedName: execute-brain
@@ -12,26 +12,26 @@ Write a function to implement a Brain\*\*\*\* interpreter. The function will tak
 
 RCBF is a set of <a href="https://rosettacode.org/wiki/Brainf***" target="_blank" rel="noopener noreferrer nofollow">Brainf\*\*\*</a> compilers and interpreters written for Rosetta Code in a variety of languages.
 
-以下是每个 RCBF 版本的链接。
+Below are links to each of the versions of RCBF.
 
-一个实现只需要正确地实现以下指令：
+An implementation need only properly implement the following instructions:
 
-| Command                   | 描述                                             |
-| ------------------------- | ---------------------------------------------- |
-| <code>></code> | Move the pointer to the right                  |
-| <code>&lt;</code> | 向左移动指针                                         |
-| <code>+</code> | 递增指针下的存储单元                                     |
-| <code>-</code> | 递减指针下的存储单元                                     |
-| <code>.</code> | 输出指针所在存储单元所代表的字符                               |
-| <code>,</code> | 输入一个字符并将其存储在指针所在的存储单元中                         |
-| <code>\[</code> | 如果指针下的存储单元为 0，则跳过匹配的 <code>]</code>  |
-| <code>]</code> | 如果指针下的存储单元非 0，则跳回匹配的 <code>\[</code> |
+| Command           | Description                                                                        |
+| ----------------- | ---------------------------------------------------------------------------------- |
+| <code>></code>    | Move the pointer to the right                                                      |
+| <code>&lt;</code> | Move the pointer to the left                                                       |
+| <code>+</code>    | Increment the memory cell under the pointer                                        |
+| <code>-</code>    | Decrement the memory cell under the pointer                                        |
+| <code>.</code>    | Output the character signified by the cell at the pointer                          |
+| <code>,</code>    | Input a character and store it in the cell at the pointer                          |
+| <code>\[</code>   | Jump past the matching <code>]</code> if the cell under the pointer is 0           |
+| <code>]</code>    | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
 
-允许任何单元格大小，EOF (*E*nd-*O*-*F*ile) 支持是可选的，就像你有有界或无界内存一样。
+Any cell size is allowed, EOF (*E*nd-*O*-*F*ile) support is optional, as is whether you have bounded or unbounded memory.
 
 # --hints--
 
-`brain(bye)` 应该返回一个字符串
+`brain(bye)` should return a string
 
 ```js
 assert(typeof brain(bye) === 'string');
@@ -43,19 +43,19 @@ assert(typeof brain(bye) === 'string');
 assert.equal(brain('++++++[>++++++++++<-]>+++++.'), 'A');
 ```
 
-`brain(bye)` 应该返回 `Goodbye, World!\r\n`
+`brain(bye)` should return `Goodbye, World!\r\n`
 
 ```js
 assert.equal(brain(bye), 'Goodbye, World!\r\n');
 ```
 
-`brain(hello)` 应该返回 `Hello World!\n`
+`brain(hello)` should return `Hello World!\n`
 
 ```js
 assert.equal(brain(hello), 'Hello World!\n');
 ```
 
-`brain(fib)` 应该返回 `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89`
+`brain(fib)` should return `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89`
 
 ```js
 assert.equal(brain(fib), '1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89');
diff --git a/curriculum/challenges/espanol/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md b/curriculum/challenges/espanol/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
index fab6e92667e..4a2b16f90ff 100644
--- a/curriculum/challenges/espanol/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
+++ b/curriculum/challenges/espanol/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
@@ -22,7 +22,8 @@ Completa la función utilizando las reglas siguientes para modificar el objeto p
 -   Tu función debe devolver siempre el objeto `records` completo.
 -   Si `value` es una cadena vacía, elimina la propiedad `prop` dada del álbum.
 -   Si `prop` no es `tracks` y `value` no es una cadena vacía, asigna el `value` a la `prop` de ese álbum.
--   Si `prop` es `tracks` y `value` no es una cadena vacía, agrega `value` al final del array de `tracks` existentes del álbum. Primero, si el álbum no tiene una propiedad `tracks`, asigne un array vacío. Luego añade el `valor` como el último elemento en el array `de pistas` del álbum.
+-   If `prop` is `tracks` and `value` isn't an empty string, but the album doesn't have a `tracks` property, create an empty array and add `value` to it.
+-   If prop is `tracks` and `value` isn't an empty string, add `value` to the end of the album's existing `tracks` array.
 
 **Nota:** Para las pruebas se utiliza una copia del objeto `recordCollection`. No debes modificar directamente el objeto `recordCollection`.
 
diff --git a/curriculum/challenges/espanol/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md b/curriculum/challenges/espanol/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
index 3b8fe0afb8e..419dbbec1f1 100644
--- a/curriculum/challenges/espanol/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
+++ b/curriculum/challenges/espanol/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
@@ -8,7 +8,7 @@ dashedName: serialization-of-a-user-object
 
 # --description--
 
-Serialización y deserialización son conceptos importantes en lo que respecta a la autentificación. Para serializar un objeto significa convertir su contenido en una pequeña *key* que puede ser deserializada en el objeto original. Esto es lo que nos permite saber quién se ha comunicado con el servidor sin tener que enviar los datos de autentificación, como el nombre de usuario y la contraseña, en cada petición de una nueva página.
+Serialization and deserialization are important concepts in regard to authentication. Para serializar un objeto significa convertir su contenido en una pequeña *key* que puede ser deserializada en el objeto original. Esto es lo que nos permite saber quién se ha comunicado con el servidor sin tener que enviar los datos de autentificación, como el nombre de usuario y la contraseña, en cada petición de una nueva página.
 
 Para configurar esto apropiadamente, necesita tener una función serializada y una función deserialización. En Passport, esto puede ser creado con:
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65576ff7888f9e96f52a4be1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65576ff7888f9e96f52a4be1.md
index 57a4feee4b3..edf645a894e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65576ff7888f9e96f52a4be1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65576ff7888f9e96f52a4be1.md
@@ -1,6 +1,6 @@
 ---
 id: 65576ff7888f9e96f52a4be1
-title: Step 2
+title: Paso 2
 challengeType: 20
 dashedName: step-2
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557709b0aee699a6a00528c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557709b0aee699a6a00528c.md
index 7603c11abc3..943adf0c78f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557709b0aee699a6a00528c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557709b0aee699a6a00528c.md
@@ -1,6 +1,6 @@
 ---
 id: 6557709b0aee699a6a00528c
-title: Step 12
+title: Paso 12
 challengeType: 20
 dashedName: step-12
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557712d77ce2d9bd7e63afd.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557712d77ce2d9bd7e63afd.md
index 6a847261ed8..e077c5f84fd 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557712d77ce2d9bd7e63afd.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557712d77ce2d9bd7e63afd.md
@@ -1,6 +1,6 @@
 ---
 id: 6557712d77ce2d9bd7e63afd
-title: Step 13
+title: Paso 13
 challengeType: 20
 dashedName: step-13
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557716aadbd2d9c42c0e69a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557716aadbd2d9c42c0e69a.md
index 593e763fee0..089f57418cb 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557716aadbd2d9c42c0e69a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557716aadbd2d9c42c0e69a.md
@@ -1,6 +1,6 @@
 ---
 id: 6557716aadbd2d9c42c0e69a
-title: Step 14
+title: Paso 14
 challengeType: 20
 dashedName: step-14
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655771d889132f9ccd341060.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655771d889132f9ccd341060.md
index 54064297cc5..c7a978a82b4 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655771d889132f9ccd341060.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655771d889132f9ccd341060.md
@@ -1,6 +1,6 @@
 ---
 id: 655771d889132f9ccd341060
-title: Step 15
+title: Paso 15
 challengeType: 20
 dashedName: step-15
 ---
@@ -9,19 +9,18 @@ dashedName: step-15
 
 A graph is called a *weighted* graph when its edges are associated with weights, representing a distance, time or other quantitative value.
 
-In your case, these weights will be the distances between each node, or point in space.
-To represent a weighted graph you can modify your dictionary, using a list of tuples for each value.
+In your case, these weights will be the distances between each node, or point in space. To represent a weighted graph you can modify your dictionary, using a list of tuples for each value.
 
 The first element in the tuple will be the connected node, and the second element will be an integer number indicating the distance.
 
 Modify `my_graph["A"]` into a list of tuples, considering the following distances:
 
 | Edge | Weight |
-|------|--------|
-| A-B  |   3    |
-| B-C  |   4    |
-| C-D  |   7    |
-| D-A  |   1    |
+| ---- | ------ |
+| A-B  | 3      |
+| B-C  | 4      |
+| C-D  | 7      |
+| D-A  | 1      |
 
 # --hints--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577236b056379d5dbc7000.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577236b056379d5dbc7000.md
index 7bce57b47fc..5bd9c523f35 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577236b056379d5dbc7000.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577236b056379d5dbc7000.md
@@ -1,6 +1,6 @@
 ---
 id: 65577236b056379d5dbc7000
-title: Step 18
+title: Paso 18
 challengeType: 20
 dashedName: step-18
 ---
@@ -9,7 +9,7 @@ dashedName: step-18
 
 Now you are going to start developing the algorithm to calculate the shortest path between each node in your new graph.
 
-Declare an empty function called `shortest_path` and don't forget the `pass` keyword. 
+Declare an empty function called `shortest_path` and don't forget the `pass` keyword.
 
 # --hints--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655773b0591c5f9f4045883e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655773b0591c5f9f4045883e.md
index 069930577af..3a6acc45a8e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655773b0591c5f9f4045883e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655773b0591c5f9f4045883e.md
@@ -1,6 +1,6 @@
 ---
 id: 655773b0591c5f9f4045883e
-title: Step 19
+title: Paso 19
 challengeType: 20
 dashedName: step-19
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655773f8b8b5db9fc6d0ae76.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655773f8b8b5db9fc6d0ae76.md
index f6578234e43..daf942f5993 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655773f8b8b5db9fc6d0ae76.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655773f8b8b5db9fc6d0ae76.md
@@ -1,6 +1,6 @@
 ---
 id: 655773f8b8b5db9fc6d0ae76
-title: Step 20
+title: Paso 20
 challengeType: 20
 dashedName: step-20
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557743527cb92a06417ea97.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557743527cb92a06417ea97.md
index 535c3dd38d1..5ff31618e0d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557743527cb92a06417ea97.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557743527cb92a06417ea97.md
@@ -1,6 +1,6 @@
 ---
 id: 6557743527cb92a06417ea97
-title: Step 21
+title: Paso 21
 challengeType: 20
 dashedName: step-21
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557746aad2844a0cd864e12.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557746aad2844a0cd864e12.md
index 85683677008..d8d1cacc473 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557746aad2844a0cd864e12.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557746aad2844a0cd864e12.md
@@ -1,6 +1,6 @@
 ---
 id: 6557746aad2844a0cd864e12
-title: Step 22
+title: Paso 22
 challengeType: 20
 dashedName: step-22
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655774955b097ea14897db12.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655774955b097ea14897db12.md
index 30203fee2b4..3f5953ca711 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655774955b097ea14897db12.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655774955b097ea14897db12.md
@@ -1,6 +1,6 @@
 ---
 id: 655774955b097ea14897db12
-title: Step 23
+title: Paso 23
 challengeType: 20
 dashedName: step-23
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655774d01daeeaa1978b99d5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655774d01daeeaa1978b99d5.md
index 904217952c5..6c7704f544a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655774d01daeeaa1978b99d5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655774d01daeeaa1978b99d5.md
@@ -1,6 +1,6 @@
 ---
 id: 655774d01daeeaa1978b99d5
-title: Step 24
+title: Paso 24
 challengeType: 20
 dashedName: step-24
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655775221059f5a20493d5d7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655775221059f5a20493d5d7.md
index f612f5496eb..e4e85024e8a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655775221059f5a20493d5d7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655775221059f5a20493d5d7.md
@@ -1,6 +1,6 @@
 ---
 id: 655775221059f5a20493d5d7
-title: Step 25
+title: Paso 25
 challengeType: 20
 dashedName: step-25
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655776db1eeae0a620e42a0d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655776db1eeae0a620e42a0d.md
index 1f04bd17df0..3e0e8af4530 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655776db1eeae0a620e42a0d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655776db1eeae0a620e42a0d.md
@@ -1,6 +1,6 @@
 ---
 id: 655776db1eeae0a620e42a0d
-title: Step 26
+title: Paso 26
 challengeType: 20
 dashedName: step-26
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655777060d8ddea6741be1b1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655777060d8ddea6741be1b1.md
index 7a1de345c83..d77df673e7d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655777060d8ddea6741be1b1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655777060d8ddea6741be1b1.md
@@ -1,6 +1,6 @@
 ---
 id: 655777060d8ddea6741be1b1
-title: Step 27
+title: Paso 27
 challengeType: 20
 dashedName: step-27
 ---
@@ -47,7 +47,7 @@ def shortest_path(graph, start):
         else:
             distances[node] = float('inf')
     print(f'Unvisited: {unvisited}\nDistances: {distances}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577739f57ecca6c39bb4e9.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577739f57ecca6c39bb4e9.md
index 86a0ca5884d..bf2ae2bafdf 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577739f57ecca6c39bb4e9.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577739f57ecca6c39bb4e9.md
@@ -1,6 +1,6 @@
 ---
 id: 65577739f57ecca6c39bb4e9
-title: Step 28
+title: Paso 28
 challengeType: 20
 dashedName: step-28
 ---
@@ -51,9 +51,9 @@ my_graph = {
 def shortest_path(graph, start):
     unvisited = []
     distances = {}
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577791ad8c26a7705e2919.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577791ad8c26a7705e2919.md
index 0aa94de8e5d..4a8e72d62db 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577791ad8c26a7705e2919.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577791ad8c26a7705e2919.md
@@ -1,6 +1,6 @@
 ---
 id: 65577791ad8c26a7705e2919
-title: Step 29
+title: Paso 29
 challengeType: 20
 dashedName: step-29
 ---
@@ -57,9 +57,9 @@ my_graph = {
 def shortest_path(graph, start):
     unvisited = list(graph)
     distances = {}
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577a17564ce8a8e06c1460.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577a17564ce8a8e06c1460.md
index a668dc5dbe2..1504089b5c1 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577a17564ce8a8e06c1460.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577a17564ce8a8e06c1460.md
@@ -1,6 +1,6 @@
 ---
 id: 65577a17564ce8a8e06c1460
-title: Step 30
+title: Paso 30
 challengeType: 20
 dashedName: step-30
 ---
@@ -46,7 +46,7 @@ def shortest_path(graph, start):
     distances = {}
     paths = {node: [] for node in graph}
     print(f'Unvisited: {unvisited}\nDistances: {distances}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
index 79b96f3ed27..c0a4f9e05c9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
@@ -1,6 +1,6 @@
 ---
 id: 65578c17d54dfab65cd54b95
-title: Step 31
+title: Paso 31
 challengeType: 20
 dashedName: step-31
 ---
@@ -19,8 +19,8 @@ You should use the `append()` method to append `start` to `paths[start]`.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\.append\s*\(\s*start\s*\)/m));
+    const {function_body} = shortest;
+    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\s*\.append\s*\(\s*start\s*\)/m));
   }
 })
 ```
@@ -41,9 +41,9 @@ def shortest_path(graph, start):
     unvisited = list(graph)
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c74607d40b6d8c4757f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c74607d40b6d8c4757f.md
index 1faffdcf694..d52b23e1c30 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c74607d40b6d8c4757f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c74607d40b6d8c4757f.md
@@ -1,6 +1,6 @@
 ---
 id: 65578c74607d40b6d8c4757f
-title: Step 32
+title: Paso 32
 challengeType: 20
 dashedName: step-32
 ---
@@ -39,9 +39,9 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cb031cd93b77a285db2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cb031cd93b77a285db2.md
index a9e24846667..ae8a9a5a7e0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cb031cd93b77a285db2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cb031cd93b77a285db2.md
@@ -1,13 +1,13 @@
 ---
 id: 65578cb031cd93b77a285db2
-title: Step 33
+title: Paso 33
 challengeType: 20
 dashedName: step-33
 ---
 
 # --description--
 
-Your function is going to explore all the nodes connected to the starting node. It will calculate the shortest paths for all of them. Then, it will remove the starting node from the unvisited nodes. 
+Your function is going to explore all the nodes connected to the starting node. It will calculate the shortest paths for all of them. Then, it will remove the starting node from the unvisited nodes.
 
 Next, the closest neighbor node will be visited and the process will be repeated until all the nodes are visited.
 
@@ -38,9 +38,9 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cee7f2cb8b80127cce2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cee7f2cb8b80127cce2.md
index 3d6c784589f..16f4ea59885 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cee7f2cb8b80127cce2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cee7f2cb8b80127cce2.md
@@ -1,6 +1,6 @@
 ---
 id: 65578cee7f2cb8b80127cce2
-title: Step 34
+title: Paso 34
 challengeType: 20
 dashedName: step-34
 ---
@@ -40,9 +40,9 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d0f6c78a0b868a43b9c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d0f6c78a0b868a43b9c.md
index f661515e703..321cee72667 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d0f6c78a0b868a43b9c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d0f6c78a0b868a43b9c.md
@@ -1,6 +1,6 @@
 ---
 id: 65578d0f6c78a0b868a43b9c
-title: Step 35
+title: Paso 35
 challengeType: 20
 dashedName: step-35
 ---
@@ -57,7 +57,7 @@ def shortest_path(graph, start):
         pass
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d4fc3afc3b8f554c882.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d4fc3afc3b8f554c882.md
index ce9dddcf7d5..a99554cdfbc 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d4fc3afc3b8f554c882.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d4fc3afc3b8f554c882.md
@@ -1,6 +1,6 @@
 ---
 id: 65578d4fc3afc3b8f554c882
-title: Step 36
+title: Paso 36
 challengeType: 20
 dashedName: step-36
 ---
@@ -9,7 +9,7 @@ dashedName: step-36
 
 `min()` takes also a keyword-only argument. Passing a function as an additional argument to `min()`, you can modify the way the list items are compared.
 
-The result of the line you've just written in the previous step is the node that comes first in alphabetical order. Instead you want to select the unvisited node having the smallest distance from the starting node. 
+The result of the line you've just written in the previous step is the node that comes first in alphabetical order. Instead you want to select the unvisited node having the smallest distance from the starting node.
 
 Pass `key=distances.get` as the second argument to your `min()` call. In this way, the comparison will take place depending on the value each `unvisited` list item has inside the `distances` dictionary.
 
@@ -48,7 +48,7 @@ def shortest_path(graph, start):
         current = min(unvisited)
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578f895f2a65ba7a916804.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578f895f2a65ba7a916804.md
index 47ddef981b0..cbdd3e5241b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578f895f2a65ba7a916804.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578f895f2a65ba7a916804.md
@@ -1,6 +1,6 @@
 ---
 id: 65578f895f2a65ba7a916804
-title: Step 37
+title: Paso 37
 challengeType: 20
 dashedName: step-37
 ---
@@ -44,7 +44,7 @@ def shortest_path(graph, start):
         current = min(unvisited, key=distances.get)
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578fcf00322dbad5dee05b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578fcf00322dbad5dee05b.md
index 915da4bb733..73e3b55ff93 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578fcf00322dbad5dee05b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578fcf00322dbad5dee05b.md
@@ -1,13 +1,13 @@
 ---
 id: 65578fcf00322dbad5dee05b
-title: Step 38
+title: Paso 38
 challengeType: 20
 dashedName: step-38
 ---
 
 # --description--
 
-Create an `if` statement to check if the distance of the neighbor node (the second item in the processed tuple) plus the distance of `current` is less than the currently known distance of the neighbor node (the first item in the processed tuple). 
+Create an `if` statement to check if the distance of the neighbor node (the second item in the processed tuple) plus the distance of `current` is less than the currently known distance of the neighbor node (the first item in the processed tuple).
 
 Use the `pass` keyword to temporarily fill the body of the `if`.
 
@@ -41,7 +41,7 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
 --fcc-editable-region--
@@ -49,7 +49,7 @@ def shortest_path(graph, start):
             pass
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655790d113d14dbb727eaf41.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655790d113d14dbb727eaf41.md
index 6e66cb1668c..b7c20425d0b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655790d113d14dbb727eaf41.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655790d113d14dbb727eaf41.md
@@ -1,6 +1,6 @@
 ---
 id: 655790d113d14dbb727eaf41
-title: Step 40
+title: Paso 40
 challengeType: 20
 dashedName: step-40
 ---
@@ -49,6 +49,6 @@ def shortest_path(graph, start):
                 distances[node] = distance + distances[current]
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557910b0ebaeebc18209e90.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557910b0ebaeebc18209e90.md
index 0f77df68976..8273502d666 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557910b0ebaeebc18209e90.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557910b0ebaeebc18209e90.md
@@ -1,6 +1,6 @@
 ---
 id: 6557910b0ebaeebc18209e90
-title: Step 41
+title: Paso 41
 challengeType: 20
 dashedName: step-41
 ---
@@ -49,7 +49,7 @@ def shortest_path(graph, start):
                     pass
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
index de171821cb3..788fe172217 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
@@ -1,6 +1,6 @@
 ---
 id: 6557913b8fe5c0bc834c9f4f
-title: Step 42
+title: Paso 42
 challengeType: 20
 dashedName: step-42
 ---
@@ -27,8 +27,8 @@ You should call `extend()` on the neighbour node path passing the current node p
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
   }
 })
 ```
@@ -50,7 +50,7 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -61,7 +61,7 @@ def shortest_path(graph, start):
                     paths[node] = paths[current]
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
index 252a744dc84..dea29445e0d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
@@ -1,6 +1,6 @@
 ---
 id: 655791847db8a9bd0b685f40
-title: Step 43
+title: Paso 43
 challengeType: 20
 dashedName: step-43
 ---
@@ -16,8 +16,8 @@ You should append `node` to `paths[node]` just after your `else` statement.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\.append\s*\(\s*node\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\s*\.append\s*\(\s*node\s*\)/ms));
   }
 })
 ```
@@ -51,7 +51,7 @@ def shortest_path(graph, start):
                     paths[node].extend(paths[current])
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791ae44c182bd92f31caa.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791ae44c182bd92f31caa.md
index 4988872c9ea..192d44934a0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791ae44c182bd92f31caa.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791ae44c182bd92f31caa.md
@@ -1,6 +1,6 @@
 ---
 id: 655791ae44c182bd92f31caa
-title: Step 44
+title: Paso 44
 challengeType: 20
 dashedName: step-44
 ---
@@ -11,7 +11,7 @@ Terminate the `while` loop by removing the current node from the `unvisited` lis
 
 # --hints--
 
-You should use the `remove()` function to remove the current node from `unvisited` after your `for` loop. 
+You should use the `remove()` function to remove the current node from `unvisited` after your `for` loop.
 
 ```js
 ({ test: () =>  {
@@ -52,7 +52,7 @@ def shortest_path(graph, start):
                 paths[node].append(node)
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791e6cf5e03be3de73451.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791e6cf5e03be3de73451.md
index fd7452e3572..f1e13afb621 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791e6cf5e03be3de73451.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791e6cf5e03be3de73451.md
@@ -1,6 +1,6 @@
 ---
 id: 655791e6cf5e03be3de73451
-title: Step 45
+title: Paso 45
 challengeType: 20
 dashedName: step-45
 ---
@@ -41,7 +41,7 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -55,9 +55,9 @@ def shortest_path(graph, start):
                     paths[node].extend(paths[current])
                 paths[node].append(node)
         unvisited.remove(current)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65579228c669fcbebffd01d5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65579228c669fcbebffd01d5.md
index e6cc432eb18..91a56b969b3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65579228c669fcbebffd01d5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65579228c669fcbebffd01d5.md
@@ -1,13 +1,13 @@
 ---
 id: 65579228c669fcbebffd01d5
-title: Step 47
+title: Paso 47
 challengeType: 20
 dashedName: step-47
 ---
 
 # --description--
 
-The other bug is subtle. When a shorter distance is found for a neighbor node, `paths[current]` gets assigned to the neighbor node path, `paths[node]`. 
+The other bug is subtle. When a shorter distance is found for a neighbor node, `paths[current]` gets assigned to the neighbor node path, `paths[node]`.
 
 This means both variables point to the same list. Since lists are mutable, when you append the neighbor node to its path, both `paths[node]` and `paths[current]` are modified because they are the same list. This results in wrong paths, although the distances are correct.
 
@@ -38,7 +38,7 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -52,9 +52,9 @@ def shortest_path(graph, start):
                     paths[node].extend(paths[current])
                 paths[node].append(node)
         unvisited.remove(current)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557924d47c325bf27afbe51.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557924d47c325bf27afbe51.md
index e26a4ea9f50..2aa016cb2ca 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557924d47c325bf27afbe51.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557924d47c325bf27afbe51.md
@@ -1,6 +1,6 @@
 ---
 id: 6557924d47c325bf27afbe51
-title: Step 48
+title: Paso 48
 challengeType: 20
 dashedName: step-48
 ---
@@ -49,7 +49,7 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -61,9 +61,9 @@ def shortest_path(graph, start):
                     paths[node].extend(paths[current])
                 paths[node].append(node)
         unvisited.remove(current)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
index 7e99e4399d9..ba13188819b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
@@ -1,6 +1,6 @@
 ---
 id: 6557927ad11e58bf8c794b25
-title: Step 50
+title: Paso 50
 challengeType: 20
 dashedName: step-50
 ---
@@ -28,7 +28,7 @@ You should print the provided string inside your new `for` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
+    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(\s*f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
   }
 })
 ```
@@ -51,7 +51,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
index c022fccc04f..0f4d987e468 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
@@ -1,6 +1,6 @@
 ---
 id: 6559d70c5161b16ff1d6530d
-title: Step 49
+title: Paso 49
 challengeType: 20
 dashedName: step-49
 ---
@@ -32,7 +32,7 @@ You should create a variable called `targets_to_print` after your `while` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=/ms));
   }
 })
 ```
@@ -43,7 +43,7 @@ You should the ternary syntax to assign `[target]` when `target` is truthy, and
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
   }
 })
 ```
@@ -65,7 +65,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -79,7 +79,7 @@ def shortest_path(graph, start, target = ''):
         unvisited.remove(current)
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d86fe1b8947954b9178d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d86fe1b8947954b9178d.md
index 7f6054a003e..853321f6a40 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d86fe1b8947954b9178d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d86fe1b8947954b9178d.md
@@ -1,6 +1,6 @@
 ---
 id: 6559d86fe1b8947954b9178d
-title: Step 51
+title: Paso 51
 challengeType: 20
 dashedName: step-51
 ---
@@ -53,7 +53,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -69,7 +69,7 @@ def shortest_path(graph, start, target = ''):
     targets_to_print = [target] if target else graph
     for node in targets_to_print:
         print(f'\n{start}-{node} distance: {distances[node]}\nPath: {" -> ".join(paths[node])}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da1b7d75f088f5e6b89f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da1b7d75f088f5e6b89f.md
index 66dc1fa7181..59522ecd903 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da1b7d75f088f5e6b89f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da1b7d75f088f5e6b89f.md
@@ -1,6 +1,6 @@
 ---
 id: 6559da1b7d75f088f5e6b89f
-title: Step 52
+title: Paso 52
 challengeType: 20
 dashedName: step-52
 ---
@@ -39,7 +39,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -57,8 +57,8 @@ def shortest_path(graph, start, target = ''):
         if node == start:
             continue
         print(f'\n{start}-{node} distance: {distances[node]}\nPath: {" -> ".join(paths[node])}')
-        
-    
+
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da93115de78dbbdc7ba3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da93115de78dbbdc7ba3.md
index 66ed7f91e47..b0b3418e242 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da93115de78dbbdc7ba3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da93115de78dbbdc7ba3.md
@@ -1,6 +1,6 @@
 ---
 id: 6559da93115de78dbbdc7ba3
-title: Step 54
+title: Paso 54
 challengeType: 20
 dashedName: step-54
 ---
@@ -39,7 +39,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -51,15 +51,15 @@ def shortest_path(graph, start, target = ''):
                     paths[node].extend(paths[current])
                 paths[node].append(node)
         unvisited.remove(current)
-    
+
     targets_to_print = [target] if target else graph
     for node in targets_to_print:
         if node == start:
             continue
         print(f'\n{start}-{node} distance: {distances[node]}\nPath: {" -> ".join(paths[node])}')
-    
+
     return distances, paths
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
@@ -81,7 +81,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -93,15 +93,15 @@ def shortest_path(graph, start, target = ''):
                     paths[node].extend(paths[current])
                 paths[node].append(node)
         unvisited.remove(current)
-    
+
     targets_to_print = [target] if target else graph
     for node in targets_to_print:
         if node == start:
             continue
         print(f'\n{start}-{node} distance: {distances[node]}\nPath: {" -> ".join(paths[node])}')
-    
+
     return distances, paths
-    
+
 shortest_path(my_graph, 'A', 'F')
 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6566195b0a021bb660b2b4b1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6566195b0a021bb660b2b4b1.md
index dd4d8cf8566..037210e7a4d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6566195b0a021bb660b2b4b1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6566195b0a021bb660b2b4b1.md
@@ -1,6 +1,6 @@
 ---
 id: 6566195b0a021bb660b2b4b1
-title: Step 16
+title: Paso 16
 challengeType: 20
 dashedName: step-16
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65661b72d6745ebec6a96923.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65661b72d6745ebec6a96923.md
index 15f4c66885c..f85ab5b9184 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65661b72d6745ebec6a96923.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65661b72d6745ebec6a96923.md
@@ -1,6 +1,6 @@
 ---
 id: 65661b72d6745ebec6a96923
-title: Step 17
+title: Paso 17
 challengeType: 20
 dashedName: step-17
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6567722f53ad97d7ea6bb082.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6567722f53ad97d7ea6bb082.md
index 74385cf9134..3ca3217801f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6567722f53ad97d7ea6bb082.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6567722f53ad97d7ea6bb082.md
@@ -1,6 +1,6 @@
 ---
 id: 6567722f53ad97d7ea6bb082
-title: Step 46
+title: Paso 46
 challengeType: 20
 dashedName: step-46
 ---
@@ -34,7 +34,7 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -48,9 +48,9 @@ def shortest_path(graph, start):
                     paths[node].extend(paths[current])
                 paths[node].append(node)
         unvisited.remove(current)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65774ae7c3eee66fe79b9459.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65774ae7c3eee66fe79b9459.md
index 10147219640..35ab5d06cdb 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65774ae7c3eee66fe79b9459.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65774ae7c3eee66fe79b9459.md
@@ -1,6 +1,6 @@
 ---
 id: 65774ae7c3eee66fe79b9459
-title: Step 53
+title: Paso 53
 challengeType: 20
 dashedName: step-53
 ---
@@ -36,7 +36,7 @@ You should modify `my_graph` into the provided graph.
         'F': [('B', 2), ('D', 3)]
     }
     graph == g
-    
+
   `))
 })
 ```
@@ -59,7 +59,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -77,7 +77,7 @@ def shortest_path(graph, start, target = ''):
         if node == start:
             continue
         print(f'\n{start}-{node} distance: {distances[node]}\nPath: {" -> ".join(paths[node])}')
-    
+
     return distances, paths
 shortest_path(my_graph, 'A')
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/657891ab9c1903f4e55433ba.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/657891ab9c1903f4e55433ba.md
index c82308e7d36..d573a433bea 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/657891ab9c1903f4e55433ba.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/657891ab9c1903f4e55433ba.md
@@ -1,6 +1,6 @@
 ---
 id: 657891ab9c1903f4e55433ba
-title: Step 39
+title: Paso 39
 challengeType: 20
 dashedName: step-39
 ---
@@ -48,7 +48,7 @@ def shortest_path(graph, start):
                 pass
 --fcc-editable-region--
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65789506b30453080f77470c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65789506b30453080f77470c.md
index ffd25cb2bcc..4f6e6d3c80c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65789506b30453080f77470c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65789506b30453080f77470c.md
@@ -1,6 +1,6 @@
 ---
 id: 65789506b30453080f77470c
-title: Step 1
+title: Paso 1
 challengeType: 20
 dashedName: step-1
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6578b13757611e2825beb8a5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6578b13757611e2825beb8a5.md
index a21a0d20e04..5af73d1e5a4 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6578b13757611e2825beb8a5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6578b13757611e2825beb8a5.md
@@ -1,6 +1,6 @@
 ---
 id: 6578b13757611e2825beb8a5
-title: Step 3
+title: Paso 3
 challengeType: 20
 dashedName: step-3
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6578b57361f2f132a02e2a18.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6578b57361f2f132a02e2a18.md
index ef6db1182f0..42a4e0c26d2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6578b57361f2f132a02e2a18.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6578b57361f2f132a02e2a18.md
@@ -1,6 +1,6 @@
 ---
 id: 6578b57361f2f132a02e2a18
-title: Step 4
+title: Paso 4
 challengeType: 20
 dashedName: step-4
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65796fac81f983127558f3f4.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65796fac81f983127558f3f4.md
index c5dbed2495a..5bb1bacde1c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65796fac81f983127558f3f4.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65796fac81f983127558f3f4.md
@@ -1,6 +1,6 @@
 ---
 id: 65796fac81f983127558f3f4
-title: Step 5
+title: Paso 5
 challengeType: 20
 dashedName: step-5
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579717f0920131304286804.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579717f0920131304286804.md
index 93d57c495e8..5a35dc6f1fb 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579717f0920131304286804.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579717f0920131304286804.md
@@ -1,6 +1,6 @@
 ---
 id: 6579717f0920131304286804
-title: Step 6
+title: Paso 6
 challengeType: 20
 dashedName: step-6
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65797670e0c0d016f17e7660.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65797670e0c0d016f17e7660.md
index fcd115aa8ff..b539351d25f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65797670e0c0d016f17e7660.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65797670e0c0d016f17e7660.md
@@ -1,6 +1,6 @@
 ---
 id: 65797670e0c0d016f17e7660
-title: Step 7
+title: Paso 7
 challengeType: 20
 dashedName: step-7
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579ca0923cfa7162089d2f0.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579ca0923cfa7162089d2f0.md
index 2b231ae0b9d..d8edb37fce5 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579ca0923cfa7162089d2f0.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579ca0923cfa7162089d2f0.md
@@ -1,6 +1,6 @@
 ---
 id: 6579ca0923cfa7162089d2f0
-title: Step 8
+title: Paso 8
 challengeType: 20
 dashedName: step-8
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
index d24ffe9dfc6..45f25092904 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
@@ -1,6 +1,6 @@
 ---
 id: 6579cbab9825b8170974c69a
-title: Step 9
+title: Paso 9
 challengeType: 20
 dashedName: step-9
 ---
@@ -25,7 +25,7 @@ Just before your `print()` call, use the `del` keyword to delete the `age` key a
 You should use the `del` keyword to delete `copper['age']` before the `print()` call.
 
 ```js
-({ test: () => assert.match(code, /^del\s+copper\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
+({ test: () => assert.match(code, /^del\s+copper\s*\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cd5f6dd62c189e53ddbb.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cd5f6dd62c189e53ddbb.md
index b8125ac549a..0d20a70850e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cd5f6dd62c189e53ddbb.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cd5f6dd62c189e53ddbb.md
@@ -1,6 +1,6 @@
 ---
 id: 6579cd5f6dd62c189e53ddbb
-title: Step 10
+title: Paso 10
 challengeType: 20
 dashedName: step-10
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579dd49fa8a8e1fd06b85a9.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579dd49fa8a8e1fd06b85a9.md
index a53dc2c5cd2..ef6baaa83ab 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579dd49fa8a8e1fd06b85a9.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579dd49fa8a8e1fd06b85a9.md
@@ -1,15 +1,14 @@
 ---
 id: 6579dd49fa8a8e1fd06b85a9
-title: Step 11
+title: Paso 11
 challengeType: 20
 dashedName: step-11
 ---
 
 # --description--
 
-Graphs are data structures representing relations between pairs of elements.
-These elements, called *nodes*, can be real-life objects, entities, points in space or others. The connections between the nodes are called the *edges*.
- 
+Graphs are data structures representing relations between pairs of elements. These elements, called *nodes*, can be real-life objects, entities, points in space or others. The connections between the nodes are called the *edges*.
+
 For example, a graph can be used to represent two points in the space, `A` and `B`, connected by a path. A graph like this will be made of two nodes connected by an edge.
 
 Rename the `copper` dictionary into `my_graph`. This will represent the graph to test your algorithm.
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656873ffdc638f7e290f60de.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656873ffdc638f7e290f60de.md
index 1ab5ce99b47..47ca51465b2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656873ffdc638f7e290f60de.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656873ffdc638f7e290f60de.md
@@ -1,6 +1,6 @@
 ---
 id: 656873ffdc638f7e290f60de
-title: Step 1
+title: Paso 1
 challengeType: 20
 dashedName: step-1
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
index cfa16de1b4d..c676176040d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
@@ -1,6 +1,6 @@
 ---
 id: 656874efd5102b81815c8ef7
-title: Step 2
+title: Paso 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -24,8 +24,8 @@ Create an `__init__` method inside your `Board` class.
 Your method should be named `__init__`. Don't add any parameters.
 
 ```js
-assert.match(code, / +def\s+__init__\s*\(\)\:/);
-``` 
+assert.match(code, / +def\s+__init__\s*\(\s*\)\:/);
+```
 
 # --seed--
 
@@ -34,6 +34,6 @@ assert.match(code, / +def\s+__init__\s*\(\)\:/);
 ```py
 --fcc-editable-region--
 class Board:
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688efcc78c9495e73acfc9.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688efcc78c9495e73acfc9.md
index 090cb6a7bc2..e0f641cfa1c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688efcc78c9495e73acfc9.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688efcc78c9495e73acfc9.md
@@ -1,6 +1,6 @@
 ---
 id: 65688efcc78c9495e73acfc9
-title: Step 3
+title: Paso 3
 challengeType: 20
 dashedName: step-3
 ---
@@ -28,6 +28,6 @@ assert.match(code, /def\s+__init__\s*\(\s*self\s*,\s*board\s*\):/);
 --fcc-editable-region--
 class Board:
     def __init__():
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f22703200963a85dfb7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f22703200963a85dfb7.md
index 0315c067b9e..3c5fd9afa2e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f22703200963a85dfb7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f22703200963a85dfb7.md
@@ -1,6 +1,6 @@
 ---
 id: 65688f22703200963a85dfb7
-title: Step 4
+title: Paso 4
 challengeType: 20
 dashedName: step-4
 ---
@@ -27,6 +27,6 @@ assert.match(code, /self\.board\s*=\s*board/);
 --fcc-editable-region--
 class Board:
     def __init__(self, board):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f737b0ef396bf0c22d6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f737b0ef396bf0c22d6.md
index 670b2ea8bd8..ef685210bb7 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f737b0ef396bf0c22d6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f737b0ef396bf0c22d6.md
@@ -1,6 +1,6 @@
 ---
 id: 65688f737b0ef396bf0c22d6
-title: Step 5
+title: Paso 5
 challengeType: 20
 dashedName: step-5
 ---
@@ -27,7 +27,7 @@ puzzle = [
 
 The resulting grid would look like this:
 
-<img class="img-responsive" src="https://cdn.freecodecamp.org/curriculum/python/sample-board.png" style="background-color: white; height:300px; width:300px; padding: 10px;">
+<img class="img-responsive" src="https://cdn.freecodecamp.org/curriculum/python/sample-board.png" style="background-color: white; height:300px; width:300px; padding: 10px;" />
 
 
 Define a method `__str__` within the `Board` class. Also, add the `self` parameter. This method is automatically called when you use the `str()` function on an instance of the class or when you use `print()` with the object.
@@ -55,6 +55,6 @@ class Board:
     def __init__(self, board):
         self.board = board
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f93a1b6e9970f710f62.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f93a1b6e9970f710f62.md
index 8ef5c8bf774..772e91e6a6f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f93a1b6e9970f710f62.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f93a1b6e9970f710f62.md
@@ -1,6 +1,6 @@
 ---
 id: 65688f93a1b6e9970f710f62
-title: Step 6
+title: Paso 6
 challengeType: 20
 dashedName: step-6
 ---
@@ -30,6 +30,6 @@ class Board:
 
 --fcc-editable-region--
     def __str__(self):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688fc27e8dda9760c45d7d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688fc27e8dda9760c45d7d.md
index 09e49231ff5..59a721669dc 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688fc27e8dda9760c45d7d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688fc27e8dda9760c45d7d.md
@@ -1,6 +1,6 @@
 ---
 id: 65688fc27e8dda9760c45d7d
-title: Step 7
+title: Paso 7
 challengeType: 20
 dashedName: step-7
 ---
@@ -29,6 +29,6 @@ class Board:
 --fcc-editable-region--
     def __str__(self):
         upper_lines = f'\n╔═══{"╤═══"*2}{"╦═══"}{"╤═══"*2}{"╦═══"}{"╤═══"*2}╗\n'
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689020cfd5279803976b25.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689020cfd5279803976b25.md
index 2df9ae6d405..7f659c1802f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689020cfd5279803976b25.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689020cfd5279803976b25.md
@@ -1,6 +1,6 @@
 ---
 id: 65689020cfd5279803976b25
-title: Step 8
+title: Paso 8
 challengeType: 20
 dashedName: step-8
 ---
@@ -30,6 +30,6 @@ class Board:
     def __str__(self):
         upper_lines = f'\n╔═══{"╤═══"*2}{"╦═══"}{"╤═══"*2}{"╦═══"}{"╤═══"*2}╗\n'
         middle_lines = f'╟───{"┼───"*2}{"╫───"}{"┼───"*2}{"╫───"}{"┼───"*2}╢\n'
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568904b83a2f29878578146.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568904b83a2f29878578146.md
index b6c4ff759c3..c3d8e801494 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568904b83a2f29878578146.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568904b83a2f29878578146.md
@@ -1,6 +1,6 @@
 ---
 id: 6568904b83a2f29878578146
-title: Step 9
+title: Paso 9
 challengeType: 20
 dashedName: step-9
 ---
@@ -37,6 +37,6 @@ class Board:
         upper_lines = f'\n╔═══{"╤═══"*2}{"╦═══"}{"╤═══"*2}{"╦═══"}{"╤═══"*2}╗\n'
         middle_lines = f'╟───{"┼───"*2}{"╫───"}{"┼───"*2}{"╫───"}{"┼───"*2}╢\n'
         lower_lines = f'╚═══{"╧═══"*2}{"╩═══"}{"╧═══"*2}{"╩═══"}{"╧═══"*2}╝\n'
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568917528820d99236ad811.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568917528820d99236ad811.md
index 14d4f7cae49..a2bcf7244b1 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568917528820d99236ad811.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568917528820d99236ad811.md
@@ -1,6 +1,6 @@
 ---
 id: 6568917528820d99236ad811
-title: Step 10
+title: Paso 10
 challengeType: 20
 dashedName: step-10
 ---
@@ -9,8 +9,7 @@ dashedName: step-10
 
 Now, you need to go over each row in the sudoku board.
 
-Enumeration is a convenient way to keep track of both the element and its position on a list.
-The `enumerate()` function is a built-in function in Python that takes an iterable (such as a list, tuple, or string) and returns an iterator that produces tuples containing indices and corresponding values from the iterable.
+Enumeration is a convenient way to keep track of both the element and its position on a list. The `enumerate()` function is a built-in function in Python that takes an iterable (such as a list, tuple, or string) and returns an iterator that produces tuples containing indices and corresponding values from the iterable.
 
 Initiate a `for` loop to iterate over each row (`line`) in the sudoku board (`self.board`).
 
@@ -48,6 +47,6 @@ class Board:
         lower_lines = f'╚═══{"╧═══"*2}{"╩═══"}{"╧═══"*2}{"╩═══"}{"╧═══"*2}╝\n'
         board_string = upper_lines
 --fcc-editable-region--
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656896ffecbf07a2d3402a93.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656896ffecbf07a2d3402a93.md
index 8e57a17e086..a759185e972 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656896ffecbf07a2d3402a93.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656896ffecbf07a2d3402a93.md
@@ -1,6 +1,6 @@
 ---
 id: 656896ffecbf07a2d3402a93
-title: Step 11
+title: Paso 11
 challengeType: 20
 dashedName: step-11
 ---
@@ -52,6 +52,6 @@ class Board:
 
 --fcc-editable-region--
         for index, line in enumerate(self.board):
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
index f18468c6e35..e1b87005922 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
@@ -1,6 +1,6 @@
 ---
 id: 6568991b4d4874a4d5271337
-title: Step 12
+title: Paso 12
 challengeType: 20
 dashedName: step-12
 ---
@@ -43,6 +43,6 @@ class Board:
 --fcc-editable-region--
         for index, line in enumerate(self.board):
           row_list = []
-          
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
index 119b0bc13a3..06a8bd54889 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
@@ -1,6 +1,6 @@
 ---
 id: 6568994faf481da5d37bfa40
-title: Step 13
+title: Paso 13
 challengeType: 20
 dashedName: step-13
 ---
@@ -16,7 +16,7 @@ Use list slicing to create the three lists of equal length representing the `lin
 You should have `enumerate([line[:3], line[3:6], line[6:]], start=1)` within the inner `for` loop.
 
 ```js
-assert.match(code, /\[line\[:3\],\s*line\[3:6\],\s*line\[6:\]\]\s*,\s*start\s*=\s*1/);
+assert.match(code, /\[\s*line\s*\[\s*:3\s*\]\s*,\s*line\s*\[\s*3\s*:\s*6\s*\]\s*,\s*line\s*\[\s*6\s*:\s*\]\s*\]\s*,\s*start\s*=\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568997f94c673a68b035b60.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568997f94c673a68b035b60.md
index ea512b10f29..39014e32938 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568997f94c673a68b035b60.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568997f94c673a68b035b60.md
@@ -1,6 +1,6 @@
 ---
 id: 6568997f94c673a68b035b60
-title: Step 14
+title: Paso 14
 challengeType: 20
 dashedName: step-14
 ---
@@ -9,7 +9,7 @@ dashedName: step-14
 
 Now, you would join the elements of the segment (`part`) with the pipe character (`|`).
 
-For that, first, use a `for` loop `for item in part` to access all elements. 
+For that, first, use a `for` loop `for item in part` to access all elements.
 
 Then, use the `join()` method on the `|` character to join the elements of the segment (`part`).
 
@@ -17,8 +17,7 @@ After that, convert each element to a string using `str(item)`.
 
 # --hints--
 
-You should use the `join()` method on the `|` character to join the elements of the segment (`part`).
-add test for "" as well
+You should use the `join()` method on the `|` character to join the elements of the segment (`part`). add test for "" as well
 
 ```js
 assert.match(code, /('|")\|\1\.join\s*\(/)
@@ -55,6 +54,6 @@ class Board:
             row_list = []
 --fcc-editable-region--
             for square_no, part in enumerate([line[:3], line[3:6], line[6:]], start=1):
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656899c0478950a7e5db2cc0.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656899c0478950a7e5db2cc0.md
index 6477d428c0a..e5f9892e9ab 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656899c0478950a7e5db2cc0.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656899c0478950a7e5db2cc0.md
@@ -1,6 +1,6 @@
 ---
 id: 656899c0478950a7e5db2cc0
-title: Step 15
+title: Paso 15
 challengeType: 20
 dashedName: step-15
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656899f4214ee6a881bc8649.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656899f4214ee6a881bc8649.md
index a3a58603e1d..4cba972259e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656899f4214ee6a881bc8649.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656899f4214ee6a881bc8649.md
@@ -1,6 +1,6 @@
 ---
 id: 656899f4214ee6a881bc8649
-title: Step 16
+title: Paso 16
 challengeType: 20
 dashedName: step-16
 ---
@@ -33,10 +33,10 @@ class Board:
         board_string = upper_lines
         for index, line in enumerate(self.board):
             row_list = []
-           
+
 --fcc-editable-region--
             for square_no, part in enumerate([line[:3], line[3:6], line[6:]], start=1):
                 row_square = '|'.join(str(item) for item in part)
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689a748de8fbaa00c5617e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689a748de8fbaa00c5617e.md
index dad88e5a3f4..ec9bf362d35 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689a748de8fbaa00c5617e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689a748de8fbaa00c5617e.md
@@ -1,6 +1,6 @@
 ---
 id: 65689a748de8fbaa00c5617e
-title: Step 17
+title: Paso 17
 challengeType: 20
 dashedName: step-17
 ---
@@ -34,11 +34,11 @@ class Board:
 
         for index, line in enumerate(self.board):
             row_list = []
-        
+
 --fcc-editable-region--
             for square_no, part in enumerate([line[:3], line[3:6], line[6:]], start=1):
                 row_square = '|'.join(str(item) for item in part)
                 row_list.extend(row_square)
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689aa3d3f2b6aad204a59e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689aa3d3f2b6aad204a59e.md
index 8cef6d1fbea..b87d6cf339a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689aa3d3f2b6aad204a59e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689aa3d3f2b6aad204a59e.md
@@ -1,6 +1,6 @@
 ---
 id: 65689aa3d3f2b6aad204a59e
-title: Step 18
+title: Paso 18
 challengeType: 20
 dashedName: step-18
 ---
@@ -37,9 +37,9 @@ class Board:
             for square_no, part in enumerate([line[:3], line[3:6], line[6:]], start=1):
                 row_square = '|'.join(str(item) for item in part)
                 row_list.extend(row_square)
-            
+
 --fcc-editable-region--
                 if square_no != 3:
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689ad61dfa81ab9ffafc86.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689ad61dfa81ab9ffafc86.md
index e1d0bfac4a9..d2221c327c9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689ad61dfa81ab9ffafc86.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689ad61dfa81ab9ffafc86.md
@@ -1,6 +1,6 @@
 ---
 id: 65689ad61dfa81ab9ffafc86
-title: Step 19
+title: Paso 19
 challengeType: 20
 dashedName: step-19
 ---
@@ -40,9 +40,9 @@ class Board:
             for square_no, part in enumerate([line[:3], line[3:6], line[6:]], start=1):
                 row_square = '|'.join(str(item) for item in part)
                 row_list.extend(row_square)
-        
+
                 if square_no != 3:
                     row_list.append('║')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689b055e6f49ac6f82d3cf.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689b055e6f49ac6f82d3cf.md
index 544c48417e5..39b6636f5b2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689b055e6f49ac6f82d3cf.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689b055e6f49ac6f82d3cf.md
@@ -1,6 +1,6 @@
 ---
 id: 65689b055e6f49ac6f82d3cf
-title: Step 20
+title: Paso 20
 challengeType: 20
 dashedName: step-20
 ---
@@ -55,6 +55,6 @@ class Board:
 
 --fcc-editable-region--
             row = f'║ {" ".join(row_list)} ║\n'
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568a242a3e1efc22b07274d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568a242a3e1efc22b07274d.md
index c897f6d6919..c2b5a397954 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568a242a3e1efc22b07274d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568a242a3e1efc22b07274d.md
@@ -1,6 +1,6 @@
 ---
 id: 6568a242a3e1efc22b07274d
-title: Step 21
+title: Paso 21
 challengeType: 20
 dashedName: step-21
 ---
@@ -44,6 +44,6 @@ class Board:
 --fcc-editable-region--
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb1ffe8462c427c0d386.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb1ffe8462c427c0d386.md
index c69ed7e6b28..3aaccb27ce2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb1ffe8462c427c0d386.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb1ffe8462c427c0d386.md
@@ -1,6 +1,6 @@
 ---
 id: 6568bb1ffe8462c427c0d386
-title: Step 22
+title: Paso 22
 challengeType: 20
 dashedName: step-22
 ---
@@ -43,6 +43,6 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb656c67e9c54cced2d7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb656c67e9c54cced2d7.md
index 10df2062e80..6c795a47f6e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb656c67e9c54cced2d7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb656c67e9c54cced2d7.md
@@ -1,6 +1,6 @@
 ---
 id: 6568bb656c67e9c54cced2d7
-title: Step 23
+title: Paso 23
 challengeType: 20
 dashedName: step-23
 ---
@@ -46,6 +46,6 @@ class Board:
             board_string += row_empty
 --fcc-editable-region--
             if index < 8:
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bba429481cc693fc2570.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bba429481cc693fc2570.md
index ea53f09c0f7..98dd7be9197 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bba429481cc693fc2570.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bba429481cc693fc2570.md
@@ -1,6 +1,6 @@
 ---
 id: 6568bba429481cc693fc2570
-title: Step 24
+title: Paso 24
 challengeType: 20
 dashedName: step-24
 ---
@@ -44,10 +44,10 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
 --fcc-editable-region--
                 if index % 3 == 2:
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bbc8c3bda1c773e23cf1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bbc8c3bda1c773e23cf1.md
index 6d78bcb93c5..9fe60907321 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bbc8c3bda1c773e23cf1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bbc8c3bda1c773e23cf1.md
@@ -1,6 +1,6 @@
 ---
 id: 6568bbc8c3bda1c773e23cf1
-title: Step 25
+title: Paso 25
 challengeType: 20
 dashedName: step-25
 ---
@@ -55,6 +55,6 @@ class Board:
 --fcc-editable-region--
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc19f3418dc8a8821187.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc19f3418dc8a8821187.md
index 197b47e04e0..e5f223b8b3c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc19f3418dc8a8821187.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc19f3418dc8a8821187.md
@@ -1,6 +1,6 @@
 ---
 id: 6568bc19f3418dc8a8821187
-title: Step 26
+title: Paso 26
 challengeType: 20
 dashedName: step-26
 ---
@@ -59,6 +59,6 @@ class Board:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
                 else:
                     board_string += middle_lines
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc85c5beadca3e0f6eb1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc85c5beadca3e0f6eb1.md
index 68b181f4fd6..1e9393e73ed 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc85c5beadca3e0f6eb1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc85c5beadca3e0f6eb1.md
@@ -1,6 +1,6 @@
 ---
 id: 6568bc85c5beadca3e0f6eb1
-title: Step 27
+title: Paso 27
 challengeType: 20
 dashedName: step-27
 ---
@@ -56,6 +56,6 @@ class Board:
                     board_string += middle_lines
             else:
                 board_string += lower_lines
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd3741e379ccc220af1b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd3741e379ccc220af1b.md
index 719913583c9..da49d61de33 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd3741e379ccc220af1b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd3741e379ccc220af1b.md
@@ -1,14 +1,13 @@
 ---
 id: 6568bd3741e379ccc220af1b
-title: Step 28
+title: Paso 28
 challengeType: 20
 dashedName: step-28
 ---
 
 # --description--
 
-Now you will work on a method that finds the empty cells in the sudoku board.
-For that, within the `Board` class, create a method named `find_empty_cell`. It takes `self` as a parameter, representing the instance of the class. Include the `pass` keyword inside the function body.
+Now you will work on a method that finds the empty cells in the sudoku board. For that, within the `Board` class, create a method named `find_empty_cell`. It takes `self` as a parameter, representing the instance of the class. Include the `pass` keyword inside the function body.
 
 # --hints--
 
@@ -60,6 +59,6 @@ class Board:
 
         return board_string
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd85482755cdd26443ae.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd85482755cdd26443ae.md
index 7b181941b50..08db332cb43 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd85482755cdd26443ae.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd85482755cdd26443ae.md
@@ -1,6 +1,6 @@
 ---
 id: 6568bd85482755cdd26443ae
-title: Step 29
+title: Paso 29
 challengeType: 20
 dashedName: step-29
 ---
@@ -73,6 +73,6 @@ class Board:
 
 --fcc-editable-region--
     def find_empty_cell(self):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bdb69e05a9cee01068a8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bdb69e05a9cee01068a8.md
index 4a8ebeae753..7f8a4e7f550 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bdb69e05a9cee01068a8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bdb69e05a9cee01068a8.md
@@ -1,6 +1,6 @@
 ---
 id: 6568bdb69e05a9cee01068a8
-title: Step 30
+title: Paso 30
 challengeType: 20
 dashedName: step-30
 ---
@@ -42,7 +42,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -52,10 +52,10 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
 --fcc-editable-region--
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
index 44cbcac5798..438b2383eba 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
@@ -1,6 +1,6 @@
 ---
 id: 6568beebba98a3d1f26f6bf8
-title: Step 31
+title: Paso 31
 challengeType: 20
 dashedName: step-31
 ---
@@ -14,13 +14,13 @@ In the `try` block, attempt to find the index of the first occurrence of `0` in
 Use the index of the first occurrence of `0` in the current row using `contents.index(0)`.
 
 ```js
-assert.match(code, /contents\.index\(0\)/)
+assert.match(code, /contents\.index\(\s*0\s*\)/)
 ```
 
 You should have `col = contents.index(0)` within the `try` block.
 
 ```js
-assert.match(code, /col\s*=\s*contents\.index\(0\)/)
+assert.match(code, /col\s*=\s*contents\.index\(\s*0\s*\)/)
 ```
 
 # --seed--
@@ -48,7 +48,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -58,11 +58,11 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
 --fcc-editable-region--
             try:
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf22bb5de0d2e8260cf3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf22bb5de0d2e8260cf3.md
index da49863cccb..b4717fc1c6a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf22bb5de0d2e8260cf3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf22bb5de0d2e8260cf3.md
@@ -1,6 +1,6 @@
 ---
 id: 6568bf22bb5de0d2e8260cf3
-title: Step 32
+title: Paso 32
 challengeType: 20
 dashedName: step-32
 ---
@@ -44,7 +44,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -54,12 +54,12 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
 --fcc-editable-region--
             try:
                 col = contents.index(0)
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf5e5b2f4bd3eb7ef995.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf5e5b2f4bd3eb7ef995.md
index 7edac62cfea..3830d919bd2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf5e5b2f4bd3eb7ef995.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf5e5b2f4bd3eb7ef995.md
@@ -1,6 +1,6 @@
 ---
 id: 6568bf5e5b2f4bd3eb7ef995
-title: Step 33
+title: Paso 33
 challengeType: 20
 dashedName: step-33
 ---
@@ -42,7 +42,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -52,13 +52,13 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
 --fcc-editable-region--
             try:
                 col = contents.index(0)
                 return row, col
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf853bf06dd4ed25d4ca.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf853bf06dd4ed25d4ca.md
index ed2c8bda6b5..36c741ba9e7 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf853bf06dd4ed25d4ca.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf853bf06dd4ed25d4ca.md
@@ -1,6 +1,6 @@
 ---
 id: 6568bf853bf06dd4ed25d4ca
-title: Step 34
+title: Paso 34
 challengeType: 20
 dashedName: step-34
 ---
@@ -9,8 +9,7 @@ dashedName: step-34
 
 If the value `0` is not present in the current row, an exception would be thrown and the `except` block would execute.
 
-The `except` block should pass and continue to the next row.
-Achieve this by using `pass`.
+The `except` block should pass and continue to the next row. Achieve this by using `pass`.
 
 # --hints--
 
@@ -45,7 +44,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -55,7 +54,7 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
             try:
@@ -63,6 +62,6 @@ class Board:
                 return row, col
 --fcc-editable-region--
             except ValueError:
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfb601a54ed5b367b44f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfb601a54ed5b367b44f.md
index 0b8f71149cb..220e7c0dfff 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfb601a54ed5b367b44f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfb601a54ed5b367b44f.md
@@ -1,6 +1,6 @@
 ---
 id: 6568bfb601a54ed5b367b44f
-title: Step 35
+title: Paso 35
 challengeType: 20
 dashedName: step-35
 ---
@@ -70,6 +70,6 @@ class Board:
                 return row, col
             except ValueError:
                 pass
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfd65322add674039bde.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfd65322add674039bde.md
index 335eb04b278..11f3ed0fdd2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfd65322add674039bde.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfd65322add674039bde.md
@@ -1,6 +1,6 @@
 ---
 id: 6568bfd65322add674039bde
-title: Step 36
+title: Paso 36
 challengeType: 20
 dashedName: step-36
 ---
@@ -81,6 +81,6 @@ class Board:
                 pass
         return None
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
index db312d68d45..ed37ba684e3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
@@ -1,6 +1,6 @@
 ---
 id: 6568c0013b3b62d7617518c7
-title: Step 37
+title: Paso 37
 challengeType: 20
 dashedName: step-37
 ---
@@ -16,7 +16,7 @@ You should check if the number(`num`) is not present in `self.board[row]`.
 You should have `num not in self.board[row]` within `valid_in_row`.
 
 ```js
-assert.match(code, /num\s+not\s+in\s+self\.board\[row\]/)
+assert.match(code, /num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/)
 ```
 
 # --seed--
@@ -44,7 +44,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -54,7 +54,7 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
             try:
@@ -63,9 +63,9 @@ class Board:
             except ValueError:
                 pass
         return None
-    
+
 --fcc-editable-region--
     def valid_in_row(self, row, num):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
index 18425964b24..7c65bfaada3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
@@ -1,6 +1,6 @@
 ---
 id: 6568c024933423d85d5ed93c
-title: Step 38
+title: Paso 38
 challengeType: 20
 dashedName: step-38
 ---
@@ -21,7 +21,7 @@ You should have `return num not in self.board[row]` within `valid_in_row`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_row");
 const {function_body} = valid;
-assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\[row\]/);
+assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/);
 ```
 
 # --seed--
@@ -49,7 +49,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -59,7 +59,7 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
             try:
@@ -68,7 +68,7 @@ class Board:
             except ValueError:
                 pass
         return None
-    
+
 --fcc-editable-region--
     def valid_in_row(self, row, num):
         num not in self.board[row]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c073d5f37fd99ab2ab0c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c073d5f37fd99ab2ab0c.md
index 793f94c2cb4..d269bff165b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c073d5f37fd99ab2ab0c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c073d5f37fd99ab2ab0c.md
@@ -1,6 +1,6 @@
 ---
 id: 6568c073d5f37fd99ab2ab0c
-title: Step 39
+title: Paso 39
 challengeType: 20
 dashedName: step-39
 ---
@@ -84,6 +84,6 @@ class Board:
     def valid_in_row(self, row, num):
         return num not in self.board[row]
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0a5edddc3daa65d20b2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0a5edddc3daa65d20b2.md
index 966465e7e8a..34e3db06afd 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0a5edddc3daa65d20b2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0a5edddc3daa65d20b2.md
@@ -1,6 +1,6 @@
 ---
 id: 6568c0a5edddc3daa65d20b2
-title: Step 40
+title: Paso 40
 challengeType: 20
 dashedName: step-40
 ---
@@ -47,7 +47,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -57,7 +57,7 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
             try:
@@ -66,12 +66,12 @@ class Board:
             except ValueError:
                 pass
         return None
-    
+
     def valid_in_row(self, row, num):
         return num not in self.board[row]
-    
+
 --fcc-editable-region--
     def valid_in_col(self, col, num):
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
index 5bdfc6359c1..a4457d298f8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
@@ -1,6 +1,6 @@
 ---
 id: 6569d83fe4dcc614c2ff971d
-title: Step 41
+title: Paso 41
 challengeType: 20
 dashedName: step-41
 ---
@@ -17,7 +17,7 @@ You should have `self.board[row][col] != num` within `valid_in_col`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /self\.board\[row\]\[col\]\s*!=\s*num/);
+assert.match(function_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num/);
 ```
 
 # --seed--
@@ -68,10 +68,10 @@ class Board:
     def valid_in_row(self, row, num):
         return num not in self.board[row]
 
-    
+
 --fcc-editable-region--
     def valid_in_col(self, col, num):
-        
+
 --fcc-editable-region--
         for row in range(9)
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
index e23e75cfe8d..d5fae3a5f0c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
@@ -1,6 +1,6 @@
 ---
 id: 6569d8a4b8d85515cbb1ce72
-title: Step 42
+title: Paso 42
 challengeType: 20
 dashedName: step-42
 ---
@@ -28,7 +28,7 @@ You should have `all(self.board[row][col] != num for row in range(9))` within `v
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /all\s*\(\s*self\.board\[row\]\[col\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
+assert.match(function_body, /all\s*\(\s*self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d946293d4f185e32e2da.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d946293d4f185e32e2da.md
index 6d564ac5635..efcc5aefb35 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d946293d4f185e32e2da.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d946293d4f185e32e2da.md
@@ -1,6 +1,6 @@
 ---
 id: 6569d946293d4f185e32e2da
-title: Step 43
+title: Paso 43
 challengeType: 20
 dashedName: step-43
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d98303af38193149b66e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d98303af38193149b66e.md
index 66cc72277e3..08feb781e50 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d98303af38193149b66e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d98303af38193149b66e.md
@@ -1,6 +1,6 @@
 ---
 id: 6569d98303af38193149b66e
-title: Step 44
+title: Paso 44
 challengeType: 20
 dashedName: step-44
 ---
@@ -91,6 +91,6 @@ class Board:
             for row in range(9)
         )
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
index a6e22c1a2cb..1ee4f0be796 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
@@ -1,6 +1,6 @@
 ---
 id: 6569d9dfd53db11b176d2963
-title: Step 45
+title: Paso 45
 challengeType: 20
 dashedName: step-45
 ---
@@ -11,8 +11,7 @@ Now you need to calculate the starting row index for the 3x3 block in the board
 
 For that, ensure that the starting row index for each 3x3 block is a multiple of 3.
 
-This can be achieved by this mathematical operation: `(row // 3) * 3`.
-Assign the result of this calculation to `row_start`.
+This can be achieved by this mathematical operation: `(row // 3) * 3`. Assign the result of this calculation to `row_start`.
 
 # --hints--
 
@@ -22,7 +21,7 @@ You should assign the result of `(row // 3) * 3` to `row_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /row_start\s*=\s*\(row\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /row_start\s*=\s*\(\s*row\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
@@ -81,6 +80,6 @@ class Board:
 
 --fcc-editable-region--
     def valid_in_square(self, row, col, num):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
index 032a6cfa19b..8fe93302118 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
@@ -1,6 +1,6 @@
 ---
 id: 6569da02e7e2641be14ff922
-title: Step 46
+title: Paso 46
 challengeType: 20
 dashedName: step-46
 ---
@@ -11,8 +11,7 @@ Next, you need to calculate the starting column index for the 3x3 block in the b
 
 For that, ensure that the starting row index for each 3x3 block is a multiple of 3.
 
-Similar to the previous step, this can be achieved by this mathematical operation: `(col // 3) * 3`.
-Assign the result of this calculation to `col_start`.
+Similar to the previous step, this can be achieved by this mathematical operation: `(col // 3) * 3`. Assign the result of this calculation to `col_start`.
 
 # --hints--
 
@@ -22,7 +21,7 @@ You should assign the result of `(col // 3) * 3` to `col_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /col_start\s*=\s*\(col\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /col_start\s*=\s*\(\s*col\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
@@ -82,6 +81,6 @@ class Board:
 --fcc-editable-region--
     def valid_in_square(self, row, col, num):
         row_start = (row // 3) * 3
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569de93a5340b202667deda.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569de93a5340b202667deda.md
index fa36204c87d..b1ca316a60f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569de93a5340b202667deda.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569de93a5340b202667deda.md
@@ -1,6 +1,6 @@
 ---
 id: 6569de93a5340b202667deda
-title: Step 47
+title: Paso 47
 challengeType: 20
 dashedName: step-47
 ---
@@ -78,6 +78,6 @@ class Board:
     def valid_in_square(self, row, col, num):
         row_start = (row // 3) * 3
         col_start=(col // 3) * 3
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569def38470282151f873ce.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569def38470282151f873ce.md
index 4596cda03b4..fe5258bf64a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569def38470282151f873ce.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569def38470282151f873ce.md
@@ -1,6 +1,6 @@
 ---
 id: 6569def38470282151f873ce
-title: Step 48
+title: Paso 48
 challengeType: 20
 dashedName: step-48
 ---
@@ -79,6 +79,6 @@ class Board:
         col_start=(col // 3) * 3
 --fcc-editable-region--
         for row_no in range(row_start, row_start + 3):
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df1d6fb83d22623b38c5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df1d6fb83d22623b38c5.md
index 9f989410878..f3d20dec33b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df1d6fb83d22623b38c5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df1d6fb83d22623b38c5.md
@@ -1,6 +1,6 @@
 ---
 id: 6569df1d6fb83d22623b38c5
-title: Step 49
+title: Paso 49
 challengeType: 20
 dashedName: step-49
 ---
@@ -82,6 +82,6 @@ class Board:
         for row_no in range(row_start, row_start + 3):
 --fcc-editable-region--
             for col_no in range(col_start, col_start + 3):
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df6916294723e01f0035.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df6916294723e01f0035.md
index 2983662af27..36c974bfbfc 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df6916294723e01f0035.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df6916294723e01f0035.md
@@ -1,6 +1,6 @@
 ---
 id: 6569df6916294723e01f0035
-title: Step 50
+title: Paso 50
 challengeType: 20
 dashedName: step-50
 ---
@@ -81,6 +81,6 @@ class Board:
             for col_no in range(col_start, col_start + 3):
 --fcc-editable-region--
                 if self.board[row_no][col_no] == num:
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df9e20f74a251d482c5d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df9e20f74a251d482c5d.md
index a36c45118b2..6ab08fed0fd 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df9e20f74a251d482c5d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df9e20f74a251d482c5d.md
@@ -1,6 +1,6 @@
 ---
 id: 6569df9e20f74a251d482c5d
-title: Step 51
+title: Paso 51
 challengeType: 20
 dashedName: step-51
 ---
@@ -86,6 +86,6 @@ class Board:
             for col_no in range(col_start, col_start + 3):
                 if self.board[row_no][col_no] == num:
                     return False
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569dffeee007f26d2b56d46.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569dffeee007f26d2b56d46.md
index 43eedb08999..97566d7049c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569dffeee007f26d2b56d46.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569dffeee007f26d2b56d46.md
@@ -1,14 +1,13 @@
 ---
 id: 6569dffeee007f26d2b56d46
-title: Step 52
+title: Paso 52
 challengeType: 20
 dashedName: step-52
 ---
 
 # --description--
 
-Within the `Board` class, create another method `is_valid`.
-It would take three parameters:
+Within the `Board` class, create another method `is_valid`. It would take three parameters:
 
 - `self` (representing the instance of the class),
 - `empty` (a tuple representing the row and column indices of an empty cell)
@@ -99,6 +98,6 @@ class Board:
                     return False
         return True
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2a01a97b231862ba2ff.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2a01a97b231862ba2ff.md
index 26b4a74ecc4..d44505c670b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2a01a97b231862ba2ff.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2a01a97b231862ba2ff.md
@@ -1,6 +1,6 @@
 ---
 id: 6569e2a01a97b231862ba2ff
-title: Step 53
+title: Paso 53
 challengeType: 20
 dashedName: step-53
 ---
@@ -84,6 +84,6 @@ class Board:
 
 --fcc-editable-region--
     def is_valid(self, empty, num):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2e1944fe7329ab21c7f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2e1944fe7329ab21c7f.md
index 7d0edae2ab9..692f83e904b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2e1944fe7329ab21c7f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2e1944fe7329ab21c7f.md
@@ -1,14 +1,13 @@
 ---
 id: 6569e2e1944fe7329ab21c7f
-title: Step 54
+title: Paso 54
 challengeType: 20
 dashedName: step-54
 ---
 
 # --description--
 
-Check if the number is valid for insertion in the specified row by calling `self.valid_in_row(row, num)`
-Assign the result to `valid_in_row`
+Check if the number is valid for insertion in the specified row by calling `self.valid_in_row(row, num)` Assign the result to `valid_in_row`
 
 # --hints--
 
@@ -86,6 +85,6 @@ class Board:
 --fcc-editable-region--
     def is_valid(self, empty, num):
         row, col = empty
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e309feb5d333867a034a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e309feb5d333867a034a.md
index 3fc6babf606..dfbaaa24311 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e309feb5d333867a034a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e309feb5d333867a034a.md
@@ -1,6 +1,6 @@
 ---
 id: 6569e309feb5d333867a034a
-title: Step 55
+title: Paso 55
 challengeType: 20
 dashedName: step-55
 ---
@@ -88,6 +88,6 @@ class Board:
     def is_valid(self, empty, num):
         row, col = empty
         valid_in_row = self.valid_in_row(row, num)
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e33a708a3834f6d4879b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e33a708a3834f6d4879b.md
index fe91d3660b6..9a66688396b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e33a708a3834f6d4879b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e33a708a3834f6d4879b.md
@@ -1,6 +1,6 @@
 ---
 id: 6569e33a708a3834f6d4879b
-title: Step 56
+title: Paso 56
 challengeType: 20
 dashedName: step-56
 ---
@@ -89,6 +89,6 @@ class Board:
         row, col = empty
         valid_in_row = self.valid_in_row(row, num)
         valid_in_col = self.valid_in_col(col, num)
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e37ec28e853628f18a86.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e37ec28e853628f18a86.md
index f11c18328cc..061703a0baa 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e37ec28e853628f18a86.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e37ec28e853628f18a86.md
@@ -1,6 +1,6 @@
 ---
 id: 6569e37ec28e853628f18a86
-title: Step 57
+title: Paso 57
 challengeType: 20
 dashedName: step-57
 ---
@@ -82,7 +82,7 @@ class Board:
                 if self.board[row_no][col_no] == num:
                     return False
         return True
-   
+
 --fcc-editable-region--
     def is_valid(self, empty, num):
         row, col = empty
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e3a134fea0371fa008de.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e3a134fea0371fa008de.md
index 572d2ae8f39..12ff036a4b0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e3a134fea0371fa008de.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e3a134fea0371fa008de.md
@@ -1,6 +1,6 @@
 ---
 id: 6569e3a134fea0371fa008de
-title: Step 58
+title: Paso 58
 challengeType: 20
 dashedName: step-58
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e3d1418b373839a0aa7b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e3d1418b373839a0aa7b.md
index b773b1552c8..9f697bd43c3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e3d1418b373839a0aa7b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e3d1418b373839a0aa7b.md
@@ -1,6 +1,6 @@
 ---
 id: 6569e3d1418b373839a0aa7b
-title: Step 59
+title: Paso 59
 challengeType: 20
 dashedName: step-59
 ---
@@ -100,6 +100,6 @@ class Board:
         valid_in_square = self.valid_in_square(row, col, num)
         return all([valid_in_row, valid_in_col, valid_in_square])
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
index b2369d87676..6af799f6fa5 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
@@ -1,6 +1,6 @@
 ---
 id: 6569e41657a9923953aa7d3c
-title: Step 60
+title: Paso 60
 challengeType: 20
 dashedName: step-60
 ---
@@ -22,7 +22,7 @@ You should have `next_empty := self.find_empty_cell()` within the `solver` metho
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\)/);
+assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\s*\)/);
 ```
 
 # --seed--
@@ -97,6 +97,6 @@ class Board:
 
 --fcc-editable-region--
     def solver(self):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
index c1fcb932ba9..7078ba0e8ba 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
@@ -1,6 +1,6 @@
 ---
 id: 6569e481e67f123ad25c5d20
-title: Step 61
+title: Paso 61
 challengeType: 20
 dashedName: step-61
 ---
@@ -16,7 +16,7 @@ You should have `if (next_empty := self.find_empty_cell()) is None:` withing `so
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /if\s*\(next_empty\s*:=\s*self\.find_empty_cell\(\)\)\s*is\s*None:/)
+assert.match(function_body, /if\s*\(\s*next_empty\s*:=\s*self\.find_empty_cell\(\s*\)\s*\)\s*is\s*None:/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6b48716b5402504e216.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6b48716b5402504e216.md
index bed8de977d7..8d1b105c075 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6b48716b5402504e216.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6b48716b5402504e216.md
@@ -1,6 +1,6 @@
 ---
 id: 6569f6b48716b5402504e216
-title: Step 62
+title: Paso 62
 challengeType: 20
 dashedName: step-62
 ---
@@ -92,6 +92,6 @@ class Board:
 --fcc-editable-region--
     def solver(self):
         if (next_empty := self.find_empty_cell()) is None:
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6ebe558bd4136da96cc.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6ebe558bd4136da96cc.md
index 9df6911a790..ebc8b49d682 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6ebe558bd4136da96cc.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6ebe558bd4136da96cc.md
@@ -1,6 +1,6 @@
 ---
 id: 6569f6ebe558bd4136da96cc
-title: Step 63
+title: Paso 63
 challengeType: 20
 dashedName: step-63
 ---
@@ -93,6 +93,6 @@ class Board:
     def solver(self):
         if (next_empty := self.find_empty_cell()) is None:
             return True
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
index 18a3122fe30..43a876d0822 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
@@ -1,13 +1,13 @@
 ---
 id: 6569f70a66ccdc42097ca051
-title: Step 64
+title: Paso 64
 challengeType: 20
 dashedName: step-64
 ---
 
 # --description--
 
-If still there are empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive).
+If there are still empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive). Your loop should use the variable named `guess`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have `for guess in range(1,10):` within the `else` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "else");
-assert.match(block_body, /for\s+\w+\s+in\s+range\(1,\s*10\)/);
+assert.match(block_body, /for\s+\w+\s+in\s+range\(\s*1,\s*10\s*\)/);
 ```
 
 # --seed--
@@ -95,6 +95,6 @@ class Board:
         if (next_empty := self.find_empty_cell()) is None:
             return True
         else:
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f770fd7dc443d6293095.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f770fd7dc443d6293095.md
index 27a4244405c..9e1c9d2a5ee 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f770fd7dc443d6293095.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f770fd7dc443d6293095.md
@@ -1,6 +1,6 @@
 ---
 id: 6569f770fd7dc443d6293095
-title: Step 65
+title: Paso 65
 challengeType: 20
 dashedName: step-65
 ---
@@ -96,6 +96,6 @@ class Board:
             return True
         else:
             for guess in range(1, 10):
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7c7f6954944d207775f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7c7f6954944d207775f.md
index d75df894d26..999c51e6bb3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7c7f6954944d207775f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7c7f6954944d207775f.md
@@ -1,6 +1,6 @@
 ---
 id: 6569f7c7f6954944d207775f
-title: Step 66
+title: Paso 66
 challengeType: 20
 dashedName: step-66
 ---
@@ -99,6 +99,6 @@ class Board:
         else:
             for guess in range(1, 10):
                 if self.is_valid(next_empty, guess):
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
index b6ad9832b2f..acf062daee9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
@@ -1,6 +1,6 @@
 ---
 id: 6569f7f2fa74c045e95676ac
-title: Step 67
+title: Paso 67
 challengeType: 20
 dashedName: step-67
 ---
@@ -17,7 +17,7 @@ You should have `self.board[row][col] = guess` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*guess/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*guess/);
 ```
 
 # --seed--
@@ -98,6 +98,6 @@ class Board:
 --fcc-editable-region--
                 if self.is_valid(next_empty, guess):
                     row, col = next_empty
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
index 3e2a15753c1..e2e3dd717f2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
@@ -1,6 +1,6 @@
 ---
 id: 6569fa5b9d507748bf4ec722
-title: Step 68
+title: Paso 68
 challengeType: 20
 dashedName: step-68
 ---
@@ -17,7 +17,7 @@ You should have `self.solver()` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.solver\(\)/);
+assert.match(block_body, /self\.solver\(\s*\)/);
 ```
 
 # --seed--
@@ -99,6 +99,6 @@ class Board:
                 if self.is_valid(next_empty, guess):
                     row, col = next_empty
                     self.board[row][col] = guess
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
index 1ba17915888..b6ffb88fd78 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
@@ -1,6 +1,6 @@
 ---
 id: 6569fa85d8f9ed49c8dfb37d
-title: Step 69
+title: Paso 69
 challengeType: 20
 dashedName: step-69
 ---
@@ -19,7 +19,7 @@ You should have `if self.solver():` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /if\s+self\.solver\(\):/);
+assert.match(block_body, /if\s+self\.solver\(\s*\):/);
 ```
 
 You should have `return True` within `if self.solver():`.
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
index b7fa7643ddf..6b9169dbe08 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
@@ -1,6 +1,6 @@
 ---
 id: 6569fabbfe1c094ad838ec4c
-title: Step 70
+title: Paso 70
 challengeType: 20
 dashedName: step-70
 ---
@@ -19,7 +19,7 @@ You should have `self.board[row][col] = 0` outside the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*0/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*0/);
 ```
 
 # --seed--
@@ -103,6 +103,6 @@ class Board:
                     self.board[row][col] = guess
                     if self.solver():
                         return True
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fbbfee025a4e850b6eaf.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fbbfee025a4e850b6eaf.md
index 461e0a29539..6a2d385d98b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fbbfee025a4e850b6eaf.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fbbfee025a4e850b6eaf.md
@@ -1,6 +1,6 @@
 ---
 id: 6569fbbfee025a4e850b6eaf
-title: Step 71
+title: Paso 71
 challengeType: 20
 dashedName: step-71
 ---
@@ -101,6 +101,6 @@ class Board:
                     if self.solver():
                         return True
                     self.board[row][col] = 0
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc21837cab5029d82e26.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc21837cab5029d82e26.md
index f601bb35c6d..d63a2729a7f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc21837cab5029d82e26.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc21837cab5029d82e26.md
@@ -1,6 +1,6 @@
 ---
 id: 6569fc21837cab5029d82e26
-title: Step 72
+title: Paso 72
 challengeType: 20
 dashedName: step-72
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
index da5c7654e4a..e1b5e657cf8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
@@ -1,6 +1,6 @@
 ---
 id: 6569fc63a404c8519d918095
-title: Step 73
+title: Paso 73
 challengeType: 20
 dashedName: step-73
 ---
@@ -18,7 +18,7 @@ You should have `gameboard = Board(board)` within the `solve_sudoku` function.
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solve_sudoku");
-assert.match(function_body, /gameboard\s*=\s*Board\(board\)/);
+assert.match(function_body, /gameboard\s*=\s*Board\(\s*board\s*\)/);
 ```
 
 # --seed--
@@ -107,6 +107,6 @@ class Board:
 
 --fcc-editable-region--
 def solve_sudoku(board):
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fca3cd7a9f52f322a298.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fca3cd7a9f52f322a298.md
index 1b33937fc3e..f23c399aff2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fca3cd7a9f52f322a298.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fca3cd7a9f52f322a298.md
@@ -1,6 +1,6 @@
 ---
 id: 6569fca3cd7a9f52f322a298
-title: Step 74
+title: Paso 74
 challengeType: 20
 dashedName: step-74
 ---
@@ -108,6 +108,6 @@ class Board:
 --fcc-editable-region--
 def solve_sudoku(board):
     gameboard = Board(board)
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd01dab2ea547d98f093.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd01dab2ea547d98f093.md
index 959c06c3cd4..7bf43d16c79 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd01dab2ea547d98f093.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd01dab2ea547d98f093.md
@@ -1,6 +1,6 @@
 ---
 id: 6569fd01dab2ea547d98f093
-title: Step 75
+title: Paso 75
 challengeType: 20
 dashedName: step-75
 ---
@@ -119,6 +119,6 @@ class Board:
 def solve_sudoku(board):
     gameboard = Board(board)
     print(f'\nPuzzle to solve:\n{gameboard}')
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd352879475599d0ec66.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd352879475599d0ec66.md
index 19586b83f7a..73bcdd8e42e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd352879475599d0ec66.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd352879475599d0ec66.md
@@ -1,6 +1,6 @@
 ---
 id: 6569fd352879475599d0ec66
-title: Step 76
+title: Paso 76
 challengeType: 20
 dashedName: step-76
 ---
@@ -110,6 +110,6 @@ def solve_sudoku(board):
 --fcc-editable-region--
     if gameboard.solver():
         print('\nSolved puzzle:')
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd6d3cb95856c9ed2190.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd6d3cb95856c9ed2190.md
index c0489a83e8b..df97f9d444c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd6d3cb95856c9ed2190.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd6d3cb95856c9ed2190.md
@@ -1,6 +1,6 @@
 ---
 id: 6569fd6d3cb95856c9ed2190
-title: Step 77
+title: Paso 77
 challengeType: 20
 dashedName: step-77
 ---
@@ -120,6 +120,6 @@ def solve_sudoku(board):
     if gameboard.solver():
         print('\nSolved puzzle:')
         print(gameboard)
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fdc59fe1b658bc9e23a4.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fdc59fe1b658bc9e23a4.md
index 2fa9c57180a..ea1e4e9d803 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fdc59fe1b658bc9e23a4.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fdc59fe1b658bc9e23a4.md
@@ -1,6 +1,6 @@
 ---
 id: 6569fdc59fe1b658bc9e23a4
-title: Step 78
+title: Paso 78
 challengeType: 20
 dashedName: step-78
 ---
@@ -113,6 +113,6 @@ def solve_sudoku(board):
 
     else:
         print('\nThe provided puzzle is unsolvable.')
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
index 66cee9efee6..87517161298 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
@@ -1,6 +1,6 @@
 ---
 id: 6569fe0fe5b5425a1bb1f534
-title: Step 79
+title: Paso 79
 challengeType: 20
 dashedName: step-79
 ---
@@ -22,7 +22,7 @@ With this, you are finished with building the sudoku solver!
 Call the `solve_sudoku` method with `puzzle` as input.
 
 ```js
-assert.match(code, /solve_sudoku\(puzzle\)/);
+assert.match(code, /solve_sudoku\(\s*puzzle\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/655cd899f8de09431eabb40c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/655cd899f8de09431eabb40c.md
index 3dc7f7ea6d8..0b78f14c637 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/655cd899f8de09431eabb40c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/655cd899f8de09431eabb40c.md
@@ -1,17 +1,17 @@
 ---
 id: 655cd899f8de09431eabb40c
-title: Step 1
+title: Paso 1
 challengeType: 20
 dashedName: step-1
 ---
 
 # --description--
 
-In this project, you'll learn data structures by building the merge sort algorithm. 
+In this project, you'll learn data structures by building the merge sort algorithm.
 
 This is a sorting algorithm that uses the divide-and-conquer principle to sort collections of data. That is, it 'divides' a collection into smaller sub-parts, and 'conquers' the sub-parts by sorting them independently, then merges the sorted sub-parts.
 
-Create a function called `merge_sort`. This function will handle the task of sorting a list of numbers. 
+Create a function called `merge_sort`. This function will handle the task of sorting a list of numbers.
 
 Use the `pass` keyword in the function body.
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6564a9fe51964c229d5b7f4c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6564a9fe51964c229d5b7f4c.md
index 8786f8bcf58..77af4b7d047 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6564a9fe51964c229d5b7f4c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6564a9fe51964c229d5b7f4c.md
@@ -1,6 +1,6 @@
 ---
 id: 6564a9fe51964c229d5b7f4c
-title: Step 2
+title: Paso 2
 challengeType: 20
 dashedName: step-2
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6564aee9c077774ea49c3faf.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6564aee9c077774ea49c3faf.md
index 20f336070d3..f1bea3b0f3e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6564aee9c077774ea49c3faf.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6564aee9c077774ea49c3faf.md
@@ -1,6 +1,6 @@
 ---
 id: 6564aee9c077774ea49c3faf
-title: Step 3
+title: Paso 3
 challengeType: 20
 dashedName: step-3
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
index 1cb0056ed31..d4aa35b31a5 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
@@ -1,13 +1,13 @@
 ---
 id: 656627b47bd2d2a4afbc945d
-title: Step 4
+title: Paso 4
 challengeType: 20
 dashedName: step-4
 ---
 
 # --description--
 
-In the previous step, you got the mid point. You can use it to divide `array` into two and assign each part to new variables. 
+In the previous step, you got the mid point. You can use it to divide `array` into two and assign each part to new variables.
 
 Use the slice syntax to extract the left half of `array` and assign it to a variable named `left_part`.
 
@@ -37,7 +37,7 @@ You should assign `array[:middle_point]` to the `left_part` variable.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /left_part\s*=\s*array\[:middle_point\]/);
+    assert.match(function_body, /left_part\s*=\s*array\s*\[\s*:\s*middle_point\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656639771fed09b5c0e8fe71.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656639771fed09b5c0e8fe71.md
index d84af3c21f4..a292369f1c1 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656639771fed09b5c0e8fe71.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656639771fed09b5c0e8fe71.md
@@ -1,6 +1,6 @@
 ---
 id: 656639771fed09b5c0e8fe71
-title: Step 6
+title: Paso 6
 challengeType: 20
 dashedName: step-6
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656680b0fc79f2c38a34d90e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656680b0fc79f2c38a34d90e.md
index b1f87bb47bc..d73388c091d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656680b0fc79f2c38a34d90e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656680b0fc79f2c38a34d90e.md
@@ -1,13 +1,13 @@
 ---
 id: 656680b0fc79f2c38a34d90e
-title: Step 10
+title: Paso 10
 challengeType: 20
 dashedName: step-10
 ---
 
 # --description--
 
-Now it's time to sort and merge the lists (`left_part` and `right_part`) into the original `array`. 
+Now it's time to sort and merge the lists (`left_part` and `right_part`) into the original `array`.
 
 You can do this by comparing elements on both lists, and merging the smaller element to the main list. You are going to do this comparison for all the indexes in `left_part` and `right_part`.
 
@@ -106,7 +106,7 @@ The value of `sorted_index` should be 0
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656702f8b4cbd8cbf0a433c6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656702f8b4cbd8cbf0a433c6.md
index 6b7bfdc65cf..2469dd4b26c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656702f8b4cbd8cbf0a433c6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656702f8b4cbd8cbf0a433c6.md
@@ -1,13 +1,13 @@
 ---
 id: 656702f8b4cbd8cbf0a433c6
-title: Step 11
+title: Paso 11
 challengeType: 20
 dashedName: step-11
 ---
 
 # --description--
 
-Inside your function, create a `while` loop that compares an element in `left_part` to an element in `right_part`, and merges the smaller element to the main `array` list. 
+Inside your function, create a `while` loop that compares an element in `left_part` to an element in `right_part`, and merges the smaller element to the main `array` list.
 
 Create two conditions for the loop: one that checks whether the `left_array_index` is less than the length of `left_part` and another condition that checks whether `right_array_index` is less than the length of `right_part`.
 
@@ -47,7 +47,7 @@ Use the `pass` keyword in the body of the loop
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
index ecb626e4765..a8521e6ec07 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
@@ -1,6 +1,6 @@
 ---
 id: 656706afd65547d22bee0b68
-title: Step 12
+title: Paso 12
 challengeType: 20
 dashedName: step-12
 ---
@@ -22,7 +22,7 @@ You should replace `pass` keyword with an `if` statement with this condition: `l
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*pass/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*pass/);
   }
 })
 ```
@@ -33,7 +33,7 @@ You should replace `pass` keyword with an `if` statement with this condition: `l
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
index 3c88a961d67..25a8bbc8e0e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
@@ -1,6 +1,6 @@
 ---
 id: 656707e11e671ed54c96f7ec
-title: Step 13
+title: Paso 13
 challengeType: 20
 dashedName: step-13
 ---
@@ -9,7 +9,7 @@ dashedName: step-13
 
 When the `if` condition evaluates to `True`, it means that the element in the `left_part` list is smaller than the element it is being compared to in the `right_part` list.
 
-In that case, you can assign the `left_part` index to the sorted array. 
+In that case, you can assign the `left_part` index to the sorted array.
 
 Inside the `if` block, remove `pass` and assign `left_part[left_array_index]` to `array[sorted_index]`.
 
@@ -24,7 +24,7 @@ You should replace `pass` with `array[sorted_index] = left_part[left_array_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*array\[sorted_index\]\s*=\s*left_part\[left_array_index\]\s*(?!.*\bpass\b)/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]\s*(?!.*\bpass\b)/);
   }
 })
 ```
@@ -35,7 +35,7 @@ You should replace `pass` with `array[sorted_index] = left_part[left_array_index
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
index 0b272a2d894..ae8cad7182b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
@@ -1,13 +1,13 @@
 ---
 id: 656709e50ed928da35260276
-title: Step 15
+title: Paso 15
 challengeType: 20
 dashedName: step-15
 ---
 
 # --description--
 
-In a previous step, you assigned the element in the `left_part` to the `array` list because it was smaller. But this will not always be the case. In some comparison cases, the element on the right could be smaller. 
+In a previous step, you assigned the element in the `left_part` to the `array` list because it was smaller. But this will not always be the case. In some comparison cases, the element on the right could be smaller.
 
 Create an `else` clause to execute when the `left_part` index is not less than the `right_part` index.
 
@@ -24,7 +24,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /else:\s*[^}]*array\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /else:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
@@ -35,7 +35,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65670d1ef177e7e2b76d9528.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65670d1ef177e7e2b76d9528.md
index 27723212a0b..9ccae585d03 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65670d1ef177e7e2b76d9528.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65670d1ef177e7e2b76d9528.md
@@ -1,13 +1,13 @@
 ---
 id: 65670d1ef177e7e2b76d9528
-title: Step 17
+title: Paso 17
 challengeType: 20
 dashedName: step-17
 ---
 
 # --description--
 
-The `if` and `else` statements you created in the previous steps will assign elements to the sorted array. 
+The `if` and `else` statements you created in the previous steps will assign elements to the sorted array.
 
 Each element assigned to the sorted array takes up an index in the list. So you have to move to the next index without an element.
 
@@ -35,7 +35,7 @@ You should increment the current value of `sorted_index` by 1.
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
index 4e907abde88..74448b4bcb9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
@@ -1,6 +1,6 @@
 ---
 id: 656710d1e0ec62253426db24
-title: Step 18
+title: Paso 18
 challengeType: 20
 dashedName: step-18
 ---
@@ -24,7 +24,7 @@ Your `while` loop should have this condition: `left_array_index < len(left_part)
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(left_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):/m);
   }
 })
 ```
@@ -38,7 +38,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
@@ -49,7 +49,7 @@ You should have the `pass` keyword in the body of your `while` loop
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
index 65c0d27144b..f076e5e86a2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
@@ -1,6 +1,6 @@
 ---
 id: 6569b0a63423f65dd30888df
-title: Step 19
+title: Paso 19
 challengeType: 20
 dashedName: step-19
 ---
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = left_part[left_array_index]` in the body
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ You should not have `pass` in the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
@@ -45,7 +45,7 @@ You should not have `pass` in the `while` loop.
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -65,7 +65,7 @@ def merge_sort(array):
             array[sorted_index] = right_part[right_array_index]
             right_array_index += 1
         sorted_index += 1
-        
+
 --fcc-editable-region--
     while left_array_index < len(left_part):
         pass
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
index aef950e75b6..448e5fda0dc 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
@@ -1,6 +1,6 @@
 ---
 id: 6569b19d31a09b65b4bc390a
-title: Step 20
+title: Paso 20
 challengeType: 20
 dashedName: step-20
 ---
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `left_array_i
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
   }
 })
 ```
@@ -31,7 +31,7 @@ You should use the `+=` operator to increment the current value of `left_array_i
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -51,7 +51,7 @@ def merge_sort(array):
             array[sorted_index] = right_part[right_array_index]
             right_array_index += 1
         sorted_index += 1
-        
+
 --fcc-editable-region--
     while left_array_index < len(left_part):
         array[sorted_index] = left_part[left_array_index]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
index 979c1b1f10a..d75e02a128c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
@@ -1,6 +1,6 @@
 ---
 id: 6569b20f829b7e69d43c232a
-title: Step 21
+title: Paso 21
 challengeType: 20
 dashedName: step-21
 ---
@@ -13,7 +13,7 @@ Using the augmented assignment addition operator, add `1` to the value of `sorte
 
 # --hints--
 
-You should use the `+= ` operator to increment the current value of `sorted_index` by one within the `while` loop.
+You should use the `+=` operator to increment the current value of `sorted_index` by one within the `while` loop.
 
 ```js
 ({
@@ -22,7 +22,7 @@ You should use the `+= ` operator to increment the current value of `sorted_inde
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
@@ -33,7 +33,7 @@ You should use the `+= ` operator to increment the current value of `sorted_inde
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -53,7 +53,7 @@ def merge_sort(array):
             array[sorted_index] = right_part[right_array_index]
             right_array_index += 1
         sorted_index += 1
-        
+
 --fcc-editable-region--
     while left_array_index < len(left_part):
         array[sorted_index] = left_part[left_array_index]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
index b3aa8cf6258..9d6993ec5b9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
@@ -1,6 +1,6 @@
 ---
 id: 6569b4e0bd29d17d4b53b16c
-title: Step 22
+title: Paso 22
 challengeType: 20
 dashedName: step-22
 ---
@@ -22,7 +22,7 @@ Your `while` loop should have this condition: `right_array_index < len(right_par
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(right_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):/m);
   }
 })
 ```
@@ -36,7 +36,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
@@ -47,7 +47,7 @@ You should have the `pass` keyword in the body of your `while` loop
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -72,7 +72,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
index 2e942436a76..29ba6a79f27 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
@@ -1,6 +1,6 @@
 ---
 id: 6569b5c820a6a1859786e774
-title: Step 23
+title: Paso 23
 challengeType: 20
 dashedName: step-23
 ---
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
@@ -45,7 +45,7 @@ There should be no `pass` keyword in the `while` loop
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -70,7 +70,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
 --fcc-editable-region--
     while right_array_index < len(right_part):
         pass
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
index 5007442c69b..f47fc9553c5 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
@@ -1,6 +1,6 @@
 ---
 id: 6569b68fac723e8c20223ed3
-title: Step 24
+title: Paso 24
 challengeType: 20
 dashedName: step-24
 ---
@@ -20,7 +20,7 @@ You should have `right_array_index += 1` within the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bright_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bright_array_index\s*\+=\s*1\b/);
   }
 })
 ```
@@ -31,7 +31,7 @@ You should have `right_array_index += 1` within the `while` loop.
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -56,7 +56,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
 --fcc-editable-region--
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
index c4a17a61789..238188dafb0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
@@ -1,6 +1,6 @@
 ---
 id: 6569b6be44940a8e2a469c31
-title: Step 25
+title: Paso 25
 challengeType: 20
 dashedName: step-25
 ---
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
@@ -31,7 +31,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -56,7 +56,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
 --fcc-editable-region--
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
index a2d5b8981cc..ff96993fd9d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
@@ -1,13 +1,13 @@
 ---
 id: 6569b743630ee592a65a7e2f
-title: Step 26
+title: Paso 26
 challengeType: 20
 dashedName: step-26
 ---
 
 # --description--
 
-Before testing the `merge_sort()` function, you need to create a base case that stops the function execution when the length of `array` is less than or equal to `1`. 
+Before testing the `merge_sort()` function, you need to create a base case that stops the function execution when the length of `array` is less than or equal to `1`.
 
 This base case will stop the recursion call. Without it, the merge sort operation would continue to run even when the list has been sorted or has no element in it.
 
@@ -24,7 +24,7 @@ You should create an `if` statement to check if `len(array) <= 1`. Don't forget
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*pass/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*pass/);
   }
 })
 ```
@@ -38,7 +38,7 @@ You should create an `if` statement to check if `len(array) <= 1`. Don't forget
 def merge_sort(array):
 
 --fcc-editable-region--
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -63,7 +63,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
index 501c899f152..f67675f9822 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
@@ -1,6 +1,6 @@
 ---
 id: 6569bca4dd9feab7b295a5e1
-title: Step 27
+title: Paso 27
 challengeType: 20
 dashedName: step-27
 ---
@@ -20,7 +20,7 @@ You should replace `pass` with a `return` statement in the body of the `if` stat
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*return/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the body of the `if` statement
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
   }
 })
 ```
@@ -49,7 +49,7 @@ def merge_sort(array):
     if len(array) <= 1:
         pass
 --fcc-editable-region--
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -74,7 +74,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569beee367427c90c74899e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569beee367427c90c74899e.md
index 96847e5f137..bd79845338c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569beee367427c90c74899e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569beee367427c90c74899e.md
@@ -1,6 +1,6 @@
 ---
 id: 6569beee367427c90c74899e
-title: Step 29
+title: Paso 29
 challengeType: 20
 dashedName: step-29
 ---
@@ -33,7 +33,7 @@ assert.match(code, /if\s+__name__\s*==\s*'__main__':\s*(?:(?!\bpass\b)[^}]*)*/);
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -58,7 +58,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c05b9166f9d5bb36c09e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c05b9166f9d5bb36c09e.md
index 20da31d7804..c3a10a0e30d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c05b9166f9d5bb36c09e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c05b9166f9d5bb36c09e.md
@@ -1,6 +1,6 @@
 ---
 id: 6569c05b9166f9d5bb36c09e
-title: Step 30
+title: Paso 30
 challengeType: 20
 dashedName: step-30
 ---
@@ -25,7 +25,7 @@ You should have `print('Unsorted array:')`
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -50,7 +50,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c166d708dcdf7c8fd34c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c166d708dcdf7c8fd34c.md
index 829074af6e5..b7e863893d7 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c166d708dcdf7c8fd34c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c166d708dcdf7c8fd34c.md
@@ -1,6 +1,6 @@
 ---
 id: 6569c166d708dcdf7c8fd34c
-title: Step 31
+title: Paso 31
 challengeType: 20
 dashedName: step-31
 ---
@@ -25,7 +25,7 @@ assert.match(code, /^\s{4}print\s*\(\s*numbers\s*\)/m)
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -50,7 +50,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
@@ -60,6 +60,6 @@ def merge_sort(array):
 if __name__ == '__main__':
     numbers = [4, 10, 6, 14, 2, 1, 8, 5]
     print('Unsorted array:')
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c1aeecaf95e25a3e2573.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c1aeecaf95e25a3e2573.md
index 71c42bf5796..ea91f69862b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c1aeecaf95e25a3e2573.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c1aeecaf95e25a3e2573.md
@@ -1,6 +1,6 @@
 ---
 id: 6569c1aeecaf95e25a3e2573
-title: Step 32
+title: Paso 32
 challengeType: 20
 dashedName: step-32
 ---
@@ -25,7 +25,7 @@ You should call the `merge_sort` function passing `numbers` as the argument.
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -50,7 +50,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c2cbf6c993ea8cd85682.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c2cbf6c993ea8cd85682.md
index 674a55939ae..8f74fbfa786 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c2cbf6c993ea8cd85682.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c2cbf6c993ea8cd85682.md
@@ -1,13 +1,13 @@
 ---
 id: 6569c2cbf6c993ea8cd85682
-title: Step 33
+title: Paso 33
 challengeType: 20
 dashedName: step-33
 ---
 
 # --description--
 
-At this point, the `numbers` list has been sorted. Call the `print` function to print string `Sorted array: ` and the sorted list.
+At this point, the `numbers` list has been sorted. Call the `print` function to print string `Sorted array:` and the sorted list.
 
 To do that, concatenate `'Sorted array: '` and `str(numbers)` in the `print()` call.
 
@@ -29,7 +29,7 @@ You should have `print('Sorted array: ' + str(numbers))` in your code. Remember
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -54,7 +54,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
@@ -77,7 +77,7 @@ if __name__ == '__main__':
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577254891048c8f2c19e961.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577254891048c8f2c19e961.md
index 73e65dc1b81..27a61b24d4c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577254891048c8f2c19e961.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577254891048c8f2c19e961.md
@@ -1,6 +1,6 @@
 ---
 id: 6577254891048c8f2c19e961
-title: Step 8
+title: Paso 8
 challengeType: 20
 dashedName: step-8
 ---
@@ -30,13 +30,13 @@ You should call `merge_sort()` again after the previous function call.
 ## --seed-contents--
 
 ```py
-    
+
 --fcc-editable-region--
 def merge_sort(array):
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
-    
+
     merge_sort(left_part)
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65772ef923f922cd720e5008.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65772ef923f922cd720e5008.md
index 1c8c0c096c2..bfc9c8169ff 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65772ef923f922cd720e5008.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65772ef923f922cd720e5008.md
@@ -1,6 +1,6 @@
 ---
 id: 65772ef923f922cd720e5008
-title: Step 7
+title: Paso 7
 challengeType: 20
 dashedName: step-7
 ---
@@ -32,11 +32,11 @@ You should pass `left_part` as the argument to your `merge_sort()` call.
 ```py
 --fcc-editable-region--
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
-    
+
     merge_sort()
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577320da0d4c2e594d418e2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577320da0d4c2e594d418e2.md
index 7583c0f72f7..5648ad919e3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577320da0d4c2e594d418e2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577320da0d4c2e594d418e2.md
@@ -1,6 +1,6 @@
 ---
 id: 6577320da0d4c2e594d418e2
-title: Step 9
+title: Paso 9
 challengeType: 20
 dashedName: step-9
 ---
@@ -32,7 +32,7 @@ You should pass `right_part` as the argument to your last `merge_sort()` call.
 ```py
 --fcc-editable-region--
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
index 16ba8c1595d..56f9183bea5 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
@@ -1,6 +1,6 @@
 ---
 id: 6577562501feabdf0984a184
-title: Step 14
+title: Paso 14
 challengeType: 20
 dashedName: step-14
 ---
@@ -21,8 +21,8 @@ You should add `1` to the current value of `left_array_index`.
     const { function_body } = merge_sort;
 
     const allowedMatches = [
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
     ]
 
     const anyMatch = allowedMatches.some((match) => match.test(function_body));
@@ -37,7 +37,7 @@ You should add `1` to the current value of `left_array_index`.
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657823a9f4f372518614c8b7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657823a9f4f372518614c8b7.md
index 2607145f054..5d55198ef9a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657823a9f4f372518614c8b7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657823a9f4f372518614c8b7.md
@@ -1,6 +1,6 @@
 ---
 id: 657823a9f4f372518614c8b7
-title: Step 16
+title: Paso 16
 challengeType: 20
 dashedName: step-16
 ---
@@ -24,7 +24,7 @@ You should add `1` to the current value of `right_array_index`.
       /else:\s*[^}]*right_array_index\s*\+=\s*1/,
       /else:\s*[^}]*right_array_index\s*=\s*right_array_index\s*\+\s*1/
     ]
-    
+
     const anyMatch = allowedMatches.some((match) => match.test(function_body))
     assert.isTrue(anyMatch);
   }
@@ -37,7 +37,7 @@ You should add `1` to the current value of `right_array_index`.
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -53,7 +53,7 @@ def merge_sort(array):
         if left_part[left_array_index] < right_part[right_array_index]:
             array[sorted_index] = left_part[left_array_index]
             left_array_index += 1
-        
+
 --fcc-editable-region--
         else:
             array[sorted_index] = right_part[right_array_index]
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
index 7c360c9cbc0..1b3b8a97650 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
@@ -1,6 +1,6 @@
 ---
 id: 657f3a661730891aa64f3568
-title: Step 5
+title: Paso 5
 challengeType: 20
 dashedName: step-5
 ---
@@ -34,7 +34,7 @@ You should assign `array[middle_point:]` to the `right_part` variable
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /right_part\s*=\s*array\[middle_point:\]/);
+    assert.match(function_body, /right_part\s*=\s*array\s*\[\s*middle_point\s*:\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f59751d5a5c9b069ae0f3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f59751d5a5c9b069ae0f3.md
index ee027cbb48e..27e7b719b8e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f59751d5a5c9b069ae0f3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f59751d5a5c9b069ae0f3.md
@@ -1,6 +1,6 @@
 ---
 id: 657f59751d5a5c9b069ae0f3
-title: Step 28
+title: Paso 28
 challengeType: 20
 dashedName: step-28
 ---
@@ -11,7 +11,7 @@ You can use the `__name__` variable to determine if a Python script is being run
 
 If the value of `__name__` is set to `'__main__'`, it implies that the current script is the main program, and not a module.
 
-In this project, you'll use the current script as the main program. 
+In this project, you'll use the current script as the main program.
 
 Create an `if` statement that checks whether the value of `__name__` is `'__main__'`.
 
@@ -39,7 +39,7 @@ assert.match(code, /if\s+__name__\s*==\s*("|')__main__\1\s*:\s*[^}]*\bpass\b/);
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -64,7 +64,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6565a536ba1f9f25bd30e88b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6565a536ba1f9f25bd30e88b.md
index b811c6ae764..490d6d27d15 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6565a536ba1f9f25bd30e88b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6565a536ba1f9f25bd30e88b.md
@@ -1,6 +1,6 @@
 ---
 id: 6565a536ba1f9f25bd30e88b
-title: Step 1
+title: Paso 1
 challengeType: 20
 dashedName: step-1
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
index f54571926b7..83039c1d24d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
@@ -1,17 +1,17 @@
 ---
 id: 656877c202f44995ed952608
-title: Step 2
+title: Paso 2
 challengeType: 20
 dashedName: step-2
 ---
 
 # --description--
 
-Replace the `pass` statement with a variable named `card_number` and a value of `4111-1111-4555-1142`.
+Replace the `pass` statement with a variable named `card_number` and a value of `'4111-1111-4555-1142'`.
 
 # --hints--
 
-You should have `card_number = "4111-1111-4555-1142"` within the `main` function.
+You should have `card_number = '4111-1111-4555-1142'` within the `main` function.
 
 ```js
 ({
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877f71bba2b97acedf9af.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877f71bba2b97acedf9af.md
index 64ca3a45edd..7e1efc5ab16 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877f71bba2b97acedf9af.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877f71bba2b97acedf9af.md
@@ -1,6 +1,6 @@
 ---
 id: 656877f71bba2b97acedf9af
-title: Step 3
+title: Paso 3
 challengeType: 20
 dashedName: step-3
 ---
@@ -15,7 +15,7 @@ str.maketrans({'t': 'c', 'l': 'b'})
 
 The above, when called on a string, will replace all `t` characters with `c` and all `l` characters with `b`.
 
-Create a variable called `card_translation` and assign it a translation table to replace all `-` and ` ` characters with an empty string.
+Create a variable called `card_translation` and assign it a translation table to replace all `-` and `` characters with an empty string.
 
 # --hints--
 
@@ -60,6 +60,6 @@ You should assign `card_translation` a value of `str.maketrans({'-': '', ' ': ''
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656878585631369a6b2d2191.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656878585631369a6b2d2191.md
index 75dfe9301f1..adf52c2ee46 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656878585631369a6b2d2191.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656878585631369a6b2d2191.md
@@ -1,6 +1,6 @@
 ---
 id: 656878585631369a6b2d2191
-title: Step 4
+title: Paso 4
 challengeType: 20
 dashedName: step-4
 ---
@@ -56,6 +56,6 @@ You should assign `translated_card_number` a value of `card_number.translate(car
 def main():
     card_number = '4111-1111-4555-1142'
     card_translation = str.maketrans({'-': '', ' ': ''})
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6568789edf2ed39c81983cc4.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6568789edf2ed39c81983cc4.md
index 7cfb8090784..c725b611fe6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6568789edf2ed39c81983cc4.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6568789edf2ed39c81983cc4.md
@@ -1,6 +1,6 @@
 ---
 id: 6568789edf2ed39c81983cc4
-title: Step 5
+title: Paso 5
 challengeType: 20
 dashedName: step-5
 ---
@@ -35,6 +35,6 @@ def main():
     card_number = '4111-1111-4555-1142'
     card_translation = str.maketrans({'-': '', ' ': ''})
     translated_card_number = card_number.translate(card_translation)
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687946130b0ea10aa19b75.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687946130b0ea10aa19b75.md
index 69e201b561d..3408e92572f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687946130b0ea10aa19b75.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687946130b0ea10aa19b75.md
@@ -1,6 +1,6 @@
 ---
 id: 65687946130b0ea10aa19b75
-title: Step 6
+title: Paso 6
 challengeType: 20
 dashedName: step-6
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879613a96aba21cbe80b9.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879613a96aba21cbe80b9.md
index 0f7c5e4f118..7c75403cae6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879613a96aba21cbe80b9.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879613a96aba21cbe80b9.md
@@ -1,6 +1,6 @@
 ---
 id: 656879613a96aba21cbe80b9
-title: Step 8
+title: Paso 8
 challengeType: 20
 dashedName: step-8
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
index 7fba10b8f2c..94e770b39f9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
@@ -1,6 +1,6 @@
 ---
 id: 656879a66338b2a461d5d307
-title: Step 9
+title: Paso 9
 challengeType: 20
 dashedName: step-9
 ---
@@ -13,7 +13,7 @@ The Luhn algorithm is as follows:
 
 1. From the right to left, double the value of every second digit; if the product is greater than 9, sum the digits of the products.
 2. Take the sum of all the digits.
-3. If the sum of all the digits is a multiple of `10`, then the number is valid; else it is not valid.
+3. If the sum of all the digits is a multiple of 10, then the number is valid; else it is not valid.
 
 Assume an example of an account number "7992739871" that will have a check digit added, making it of the form 7992739871x:
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
index 96aaf4a6af1..6ae16aba314 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
@@ -1,6 +1,6 @@
 ---
 id: 656879c6f35a85a59c06b3a7
-title: Step 10
+title: Paso 10
 challengeType: 20
 dashedName: step-10
 ---
@@ -30,7 +30,7 @@ You should have `card_number_reversed = card_number[0:4]` within the `verify_car
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*\]/);
     }
 })
 ```
@@ -44,7 +44,7 @@ You should have `card_number_reversed = card_number[0:4]` within the `verify_car
 --fcc-editable-region--
 def verify_card_number(card_number):
     sum_of_odd_digits = 0
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879e1c749d7a6c5eba2d2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879e1c749d7a6c5eba2d2.md
index 01b76f53af6..eb5ac64a898 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879e1c749d7a6c5eba2d2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879e1c749d7a6c5eba2d2.md
@@ -1,6 +1,6 @@
 ---
 id: 656879e1c749d7a6c5eba2d2
-title: Step 15
+title: Paso 15
 challengeType: 20
 dashedName: step-15
 ---
@@ -35,7 +35,7 @@ def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[::-1]
     print(card_number_reversed)
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a005aba3ea815b84e68.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a005aba3ea815b84e68.md
index 8fc556a4eb7..e150b8081cb 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a005aba3ea815b84e68.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a005aba3ea815b84e68.md
@@ -1,6 +1,6 @@
 ---
 id: 65687a005aba3ea815b84e68
-title: Step 16
+title: Paso 16
 challengeType: 20
 dashedName: step-16
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
index 8d3a8e06223..eead42b09f6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
@@ -1,6 +1,6 @@
 ---
 id: 65687a8253766cac4c99c57f
-title: Step 17
+title: Paso 17
 challengeType: 20
 dashedName: step-17
 ---
@@ -20,7 +20,7 @@ You should have `odd_digits = card_number_reversed[::2]` within the `verify_card
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\[::2\]/);
+        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\s*\[\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
@@ -34,7 +34,7 @@ You should have `odd_digits = card_number_reversed[::2]` within the `verify_card
 def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[::-1]
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a923dd792ad339f9c09.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a923dd792ad339f9c09.md
index d8cc83b92fc..2fd04fdf3e1 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a923dd792ad339f9c09.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a923dd792ad339f9c09.md
@@ -1,6 +1,6 @@
 ---
 id: 65687a923dd792ad339f9c09
-title: Step 18
+title: Paso 18
 challengeType: 20
 dashedName: step-18
 ---
@@ -35,7 +35,7 @@ def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[::-1]
     odd_digits = card_number_reversed[::2]
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687ad86596e0af38640a84.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687ad86596e0af38640a84.md
index 5dc318f5122..1e82a5edd1b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687ad86596e0af38640a84.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687ad86596e0af38640a84.md
@@ -1,6 +1,6 @@
 ---
 id: 65687ad86596e0af38640a84
-title: Step 19
+title: Paso 19
 challengeType: 20
 dashedName: step-19
 ---
@@ -33,7 +33,7 @@ You should have `--fcc-expected--` within the `for` loop.
         const transformedCode = code.replace(/\r/g, "");
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
-    
+
         // Get variable name used in for loop
         const for_loop_variable = function_body.match(/for\s+(\w+)\s+in\s+odd_digits/)?.[1];
         assert.exists(for_loop_variable);
@@ -55,7 +55,7 @@ def verify_card_number(card_number):
     odd_digits = card_number_reversed[::2]
 
     print(odd_digits)
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b182c2a8fb1470e0b97.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b182c2a8fb1470e0b97.md
index ef20502aa19..c2451841100 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b182c2a8fb1470e0b97.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b182c2a8fb1470e0b97.md
@@ -1,6 +1,6 @@
 ---
 id: 65687b182c2a8fb1470e0b97
-title: Step 20
+title: Paso 20
 challengeType: 20
 dashedName: step-20
 ---
@@ -34,7 +34,7 @@ def verify_card_number(card_number):
 
     for digit in odd_digits:
         print(digit)
-        
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
index 96c14ef4193..7425a9936ed 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
@@ -1,6 +1,6 @@
 ---
 id: 65687b48f2201ab32e06c37c
-title: Step 21
+title: Paso 21
 challengeType: 20
 dashedName: step-21
 ---
@@ -27,7 +27,7 @@ You should have `sum_of_odd_digits += int(digit)` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(digit\)/);
+        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(\s*digit\s*\)/);
     }
 })
 ```
@@ -76,7 +76,7 @@ def verify_card_number(card_number):
     for digit in odd_digits:
         print(digit)
         sum_of_odd_digits += digit
-        
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b68003a61b46fe691f0.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b68003a61b46fe691f0.md
index 026f347104f..1c599122a36 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b68003a61b46fe691f0.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b68003a61b46fe691f0.md
@@ -1,6 +1,6 @@
 ---
 id: 65687b68003a61b46fe691f0
-title: Step 22
+title: Paso 22
 challengeType: 20
 dashedName: step-22
 ---
@@ -39,7 +39,7 @@ def verify_card_number(card_number):
     for digit in odd_digits:
         sum_of_odd_digits += int(digit)
     print(sum_of_odd_digits)
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
index 508c88acb7a..2546fd74739 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
@@ -1,6 +1,6 @@
 ---
 id: 65687b8eb0bbf7b5d41b610b
-title: Step 23
+title: Paso 23
 challengeType: 20
 dashedName: step-23
 ---
@@ -20,7 +20,7 @@ You should have `even_digits = card_number_reversed[1::2]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\[1::2\]/);
+        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\s*\[\s*1\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
@@ -41,7 +41,7 @@ def verify_card_number(card_number):
 
 --fcc-editable-region--
     sum_of_even_digits = 0
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687bbfd9a7d6b78cd5b5cf.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687bbfd9a7d6b78cd5b5cf.md
index ff9a5695d74..750474c828f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687bbfd9a7d6b78cd5b5cf.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687bbfd9a7d6b78cd5b5cf.md
@@ -1,6 +1,6 @@
 ---
 id: 65687bbfd9a7d6b78cd5b5cf
-title: Step 24
+title: Paso 24
 challengeType: 20
 dashedName: step-24
 ---
@@ -62,7 +62,7 @@ def verify_card_number(card_number):
 --fcc-editable-region--
     sum_of_even_digits = 0
     even_digits = card_number_reversed[1::2]
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c2fd0fec7ba9fb8af30.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c2fd0fec7ba9fb8af30.md
index 511d03209f3..7ae1aa25364 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c2fd0fec7ba9fb8af30.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c2fd0fec7ba9fb8af30.md
@@ -1,6 +1,6 @@
 ---
 id: 65687c2fd0fec7ba9fb8af30
-title: Step 25
+title: Paso 25
 challengeType: 20
 dashedName: step-25
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
index 23c8ebcdcd2..38b056c4755 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
@@ -1,6 +1,6 @@
 ---
 id: 65687c8d86e18cbd775a53c9
-title: Step 26
+title: Paso 26
 challengeType: 20
 dashedName: step-26
 ---
@@ -22,7 +22,7 @@ You should have `number = int(digit) * 2` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /number\s*=\s*int\(digit\)\s*\*\s*2/);
+        assert.match(function_body, /number\s*=\s*int\(\s*digit\s*\)\s*\*\s*2/);
     }
 })
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687da2e60409c45595bbe1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687da2e60409c45595bbe1.md
index f417dfbafe0..2c2b6116c53 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687da2e60409c45595bbe1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687da2e60409c45595bbe1.md
@@ -1,6 +1,6 @@
 ---
 id: 65687da2e60409c45595bbe1
-title: Step 27
+title: Paso 27
 challengeType: 20
 dashedName: step-27
 ---
@@ -59,7 +59,7 @@ def verify_card_number(card_number):
     even_digits = card_number_reversed[1::2]
     for digit in even_digits:
         number = int(digit) * 2
-        
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
index 2ec9bd0bc0c..9862743519f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
@@ -1,6 +1,6 @@
 ---
 id: 65687db6a9fcf3c548a6c1b7
-title: Step 28
+title: Paso 28
 challengeType: 20
 dashedName: step-28
 ---
@@ -30,8 +30,8 @@ You should have `number = number // 10 + number % 10` within the `if` statement.
         const verify_card_number = __helpers.python.getBlock("\n" + transformedCode, "if number >= 10");
         const { block_body } = verify_card_number;
         const allowedMatches = [
-            /number *= *\(?number *\/\/ *10\)? *\+ *\(?number *% *10/,
-            /number *= *\(?number *% *10\)? *\+ *\(?number *\/\/ *10/
+            /number *= *\(?\s*number *\/\/ *10\s*\)? *\+ *\(?\s*number *% *10/,
+            /number *= *\(?\s*number *% *10\s*\)? *\+ *\(?\s*number *\/\/ *10/
         ];
 
         const someMatch = allowedMatches.some(allowedMatch => allowedMatch.test(block_body));
@@ -60,7 +60,7 @@ def verify_card_number(card_number):
         number = int(digit) * 2
         if number >= 10:
             print(number)
-            
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687dd4b641fdc67d7de487.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687dd4b641fdc67d7de487.md
index 3c53a952932..dac109a7ac5 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687dd4b641fdc67d7de487.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687dd4b641fdc67d7de487.md
@@ -1,6 +1,6 @@
 ---
 id: 65687dd4b641fdc67d7de487
-title: Step 29
+title: Paso 29
 challengeType: 20
 dashedName: step-29
 ---
@@ -48,7 +48,7 @@ def verify_card_number(card_number):
         if number >= 10:
             print(number)
             number = (number // 10) + (number % 10)
-            
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e069cf4e0c85b0a06b1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e069cf4e0c85b0a06b1.md
index 8aa3e954d8d..63d69da81a4 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e069cf4e0c85b0a06b1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e069cf4e0c85b0a06b1.md
@@ -1,6 +1,6 @@
 ---
 id: 65687e069cf4e0c85b0a06b1
-title: Step 30
+title: Paso 30
 challengeType: 20
 dashedName: step-30
 ---
@@ -76,7 +76,7 @@ def verify_card_number(card_number):
         if number >= 10:
             number = (number // 10) + (number % 10)
             print(number)
-        
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e0ed12e20c91811a48d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e0ed12e20c91811a48d.md
index 0208aba38a1..ce3914fc931 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e0ed12e20c91811a48d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e0ed12e20c91811a48d.md
@@ -1,6 +1,6 @@
 ---
 id: 65687e0ed12e20c91811a48d
-title: Step 31
+title: Paso 31
 challengeType: 20
 dashedName: step-31
 ---
@@ -64,7 +64,7 @@ def verify_card_number(card_number):
         if number >= 10:
             number = (number // 10) + (number % 10)
         sum_of_even_digits += number
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e294ef2bdca637fb213.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e294ef2bdca637fb213.md
index 8835a7540ee..0c0db55cdda 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e294ef2bdca637fb213.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e294ef2bdca637fb213.md
@@ -1,6 +1,6 @@
 ---
 id: 65687e294ef2bdca637fb213
-title: Step 32
+title: Paso 32
 challengeType: 20
 dashedName: step-32
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
index f6d57f5389c..9106a29ff3d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
@@ -1,13 +1,13 @@
 ---
 id: 65687e457ab1c4cb8c3fe7c8
-title: Step 33
+title: Paso 33
 challengeType: 20
 dashedName: step-33
 ---
 
 # --description--
 
-Adjust the `verify_card_number` call such that if it returns `True`, print `VALID!` to the console. Otherwise, print `INVALID!`.
+Adjust the `verify_card_number` call such that if it returns `True`, print `'VALID!'` to the console. Otherwise, print `'INVALID!'`.
 
 # --hints--
 
@@ -19,14 +19,14 @@ You should have `if verify_card_number(translated_card_number):` within the `mai
         const transformedCode = code.replace(/\r/g, "");
         const main = __helpers.python.getDef("\n" + transformedCode, "main");
         const { function_body } = main;
-        
+
         const if_statement = __helpers.python.getBlock("\n" + function_body, "if verify_card_number(translated_card_number)");
         assert.exists(if_statement);
     }
 })
 ```
 
-You should have `print("VALID!")` within the `if` statement.
+You should have `print('VALID!')` within the `if` statement.
 
 ```js
 ({
@@ -40,7 +40,7 @@ You should have `print("VALID!")` within the `if` statement.
 })
 ```
 
-You should have `print("INVALID!")` within the `else` clause.
+You should have `print('INVALID!')` within the `else` clause.
 
 ```js
 ({
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
index 3b853aff1a9..a79284af382 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
@@ -1,13 +1,13 @@
 ---
 id: 65687f47f9001dd35bdcd5ab
-title: Step 34
+title: Paso 34
 challengeType: 20
 dashedName: step-34
 ---
 
 # --description--
 
-Change the value of `card_number` such that `INVALID!` is printed to the console.
+Change the value of `card_number` such that `'INVALID!'` is printed to the console.
 
 # --hints--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656880227dab4bd8fbc02d41.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656880227dab4bd8fbc02d41.md
index 3a9af1fc997..1db2a2eb338 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656880227dab4bd8fbc02d41.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656880227dab4bd8fbc02d41.md
@@ -1,6 +1,6 @@
 ---
 id: 656880227dab4bd8fbc02d41
-title: Step 35
+title: Paso 35
 challengeType: 20
 dashedName: step-35
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6569b831a07d7154c793301b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6569b831a07d7154c793301b.md
index 44eb505f6b2..b53b581d7ab 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6569b831a07d7154c793301b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6569b831a07d7154c793301b.md
@@ -1,6 +1,6 @@
 ---
 id: 6569b831a07d7154c793301b
-title: Step 7
+title: Paso 7
 challengeType: 20
 dashedName: step-7
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b4638cb8bcf2729afe9a9.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b4638cb8bcf2729afe9a9.md
index e549cf8d91d..681f09e262f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b4638cb8bcf2729afe9a9.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b4638cb8bcf2729afe9a9.md
@@ -1,6 +1,6 @@
 ---
 id: 656b4638cb8bcf2729afe9a9
-title: Step 11
+title: Paso 11
 challengeType: 20
 dashedName: step-11
 ---
@@ -34,7 +34,7 @@ You should have `print(card_number_reversed)` within the `verify_card_number` fu
 def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[0:4]
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
index 3c687e1b7f6..a97691ad34a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
@@ -1,6 +1,6 @@
 ---
 id: 656b475b394390334828eb12
-title: Step 12
+title: Paso 12
 challengeType: 20
 dashedName: step-12
 ---
@@ -20,7 +20,7 @@ You should have `card_number_reversed = card_number[0:4:2]` within the `verify_c
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4:2\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*:\s*2\s*\]/);
     }
 })
 ```
@@ -35,7 +35,7 @@ def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[0:4]
     print(card_number_reversed)
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b47dc2cf39e37025dc033.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b47dc2cf39e37025dc033.md
index 041de16ae18..059e6a25006 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b47dc2cf39e37025dc033.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b47dc2cf39e37025dc033.md
@@ -1,6 +1,6 @@
 ---
 id: 656b47dc2cf39e37025dc033
-title: Step 13
+title: Paso 13
 challengeType: 20
 dashedName: step-13
 ---
@@ -43,7 +43,7 @@ def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[0:4:2]
     print(card_number_reversed)
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
index 18f8bda58a4..da757c732a4 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
@@ -1,6 +1,6 @@
 ---
 id: 656b481ec4976439565a78b2
-title: Step 14
+title: Paso 14
 challengeType: 20
 dashedName: step-14
 ---
@@ -27,7 +27,7 @@ You should have `card_number_reversed = card_number[::-1]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[::-1\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*:\s*:\s*-1\s*\]/);
     }
 })
 ```
@@ -42,7 +42,7 @@ def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[-1:-5:-1]
     print(card_number_reversed)
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658212ba98182f3e855e85f9.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658212ba98182f3e855e85f9.md
index 4ad1a0f5ab4..3f4b76fbbd8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658212ba98182f3e855e85f9.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658212ba98182f3e855e85f9.md
@@ -1,6 +1,6 @@
 ---
 id: 658212ba98182f3e855e85f9
-title: Step 1
+title: Paso 1
 challengeType: 20
 dashedName: step-1
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65821c1c40ccac44adf38e6b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65821c1c40ccac44adf38e6b.md
index c35f36685dd..b7842b95b29 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65821c1c40ccac44adf38e6b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65821c1c40ccac44adf38e6b.md
@@ -1,6 +1,6 @@
 ---
 id: 65821c1c40ccac44adf38e6b
-title: Step 2
+title: Paso 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -36,7 +36,7 @@ You should assign an empty list to the `expenses` variable.
 ```py
 def add_expense(expenses, amount, category):
     pass
-    
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65821fcc010c3245718f2a06.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65821fcc010c3245718f2a06.md
index 0c83f09ee12..a8cab4a0c12 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65821fcc010c3245718f2a06.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65821fcc010c3245718f2a06.md
@@ -1,6 +1,6 @@
 ---
 id: 65821fcc010c3245718f2a06
-title: Step 3
+title: Paso 3
 challengeType: 20
 dashedName: step-3
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
index d7aab5b3d3a..02188d9bff4 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
@@ -1,6 +1,6 @@
 ---
 id: 65822308ded1ba4632f66aa3
-title: Step 4
+title: Paso 4
 challengeType: 20
 dashedName: step-4
 ---
@@ -10,10 +10,10 @@ dashedName: step-4
 A dictionary is another built-in data type in Python. A dictionary is a collection of data in the form of *key*-*value* pairs. Dictionaries are defined with curly braces `{}` and they contain key-value pairs separated by commas. Each key is followed by a colon `:` and the value:
 
 ```py
-{"amount": 50.0, "category": "Food"}
+{'amount': 50.0, 'category': 'Food'}
 ```
 
-In the example above, `amount` and `category` are keys, and `50.0` and `Food` are their the corresponding values.
+In the example above, `amount` and `category` are keys, and `50.0` and `'Food'` are their the corresponding values.
 
 Create a dictionary with a key `amount` and value of the `amount` parameter and pass your new dictionary to the `.append()` call.
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
index 07f21ecefcc..02e9d484983 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
@@ -1,13 +1,13 @@
 ---
 id: 658225d560369446ece5518b
-title: Step 5
+title: Paso 5
 challengeType: 20
 dashedName: step-5
 ---
 
 # --description--
 
-Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `category` as the key, and the `category` parameter as the value.
+Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `'category'` as the key, and the `category` parameter as the value.
 
 # --hints--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582267ef39f5047411c1743.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582267ef39f5047411c1743.md
index d1b44c773f7..6b443eccc2d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582267ef39f5047411c1743.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582267ef39f5047411c1743.md
@@ -1,6 +1,6 @@
 ---
 id: 6582267ef39f5047411c1743
-title: Step 6
+title: Paso 6
 challengeType: 20
 dashedName: step-6
 ---
@@ -41,7 +41,7 @@ Your `print_expenses` function should take a single parameter `expenses`.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822773f4c60a479ec89f66.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822773f4c60a479ec89f66.md
index d83045363fe..ad91199f23e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822773f4c60a479ec89f66.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822773f4c60a479ec89f66.md
@@ -1,6 +1,6 @@
 ---
 id: 65822773f4c60a479ec89f66
-title: Step 7
+title: Paso 7
 challengeType: 20
 dashedName: step-7
 ---
@@ -24,7 +24,7 @@ You should have `for expense in expenses:` in your `print_expenses` function. Re
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 --fcc-editable-region--
 def print_expenses(expenses):
     pass
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822934c8a0454803e3ef12.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822934c8a0454803e3ef12.md
index 4eb07ae618f..2a2fddb576a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822934c8a0454803e3ef12.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822934c8a0454803e3ef12.md
@@ -1,6 +1,6 @@
 ---
 id: 65822934c8a0454803e3ef12
-title: Step 8
+title: Paso 8
 challengeType: 20
 dashedName: step-8
 ---
@@ -26,7 +26,7 @@ You should have `print(f'Amount: {expense}, Category: {expense}')` in your `for`
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 --fcc-editable-region--
 def print_expenses(expenses):
     for expense in expenses:
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
index 18e1e8659b1..1d7961d3b90 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
@@ -1,6 +1,6 @@
 ---
 id: 65822bd82d708c4895080c35
-title: Step 9
+title: Paso 9
 challengeType: 20
 dashedName: step-9
 ---
@@ -10,11 +10,11 @@ dashedName: step-9
 You can access values in a dictionary through its keys. You need to use the bracket notation and include the key between the square brackets:
 
 ```py
-my_dict = {"amount": 50.0, "category": "Food"}
-my_dict["amount"] # 50.0
+my_dict = {'amount': 50.0, 'category': 'Food'}
+my_dict['amount'] # 50.0
 ```
 
-You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `amount` key and the `category` key in the `expense` dictionary.
+You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `'amount'` key and the `'category'` key in the `expense` dictionary.
 
 # --hints--
 
@@ -31,7 +31,7 @@ You should pass `f'Amount: {expense["amount"]}, Category: {expense["category"]}'
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 --fcc-editable-region--
 def print_expenses(expenses):
     for expense in expenses:
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823040bdb32949d4c1a96f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823040bdb32949d4c1a96f.md
index 7d4ac5f9d33..6bb541fc066 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823040bdb32949d4c1a96f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823040bdb32949d4c1a96f.md
@@ -1,6 +1,6 @@
 ---
 id: 65823040bdb32949d4c1a96f
-title: Step 10
+title: Paso 10
 challengeType: 20
 dashedName: step-10
 ---
@@ -39,7 +39,7 @@ Your`total_expenses` function should take a single `expenses` parameter.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
index 119fc461994..f5738d3a58a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
@@ -1,6 +1,6 @@
 ---
 id: 6582324b5d37fe4b622bc3c0
-title: Step 11
+title: Paso 11
 challengeType: 20
 dashedName: step-11
 ---
@@ -13,7 +13,7 @@ Lambda functions are brief, anonymous functions in Python, ideal for simple, one
 lambda x: expr
 ```
 
-In the example above, `x` is a parameter to be use in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
+In the example above, `x` is a parameter to be used in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
 
 # --hints--
 
@@ -30,14 +30,14 @@ You should have `test = lambda x: x * 2` in your code.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
 
 def total_expenses(expenses):
     pass
-    
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582352cbdbcde4d0c4f7b0b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582352cbdbcde4d0c4f7b0b.md
index 60685d4ceba..b33906e0347 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582352cbdbcde4d0c4f7b0b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582352cbdbcde4d0c4f7b0b.md
@@ -1,6 +1,6 @@
 ---
 id: 6582352cbdbcde4d0c4f7b0b
-title: Step 12
+title: Paso 12
 challengeType: 20
 dashedName: step-12
 ---
@@ -26,14 +26,14 @@ You should have `print(test(3))` in your code.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
 
 def total_expenses(expenses):
     pass
-    
+
 --fcc-editable-region--
 test = lambda x: x * 2
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823634a308cb4d6bcc5fa6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823634a308cb4d6bcc5fa6.md
index 9f673977231..ccba8ba497a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823634a308cb4d6bcc5fa6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823634a308cb4d6bcc5fa6.md
@@ -1,6 +1,6 @@
 ---
 id: 65823634a308cb4d6bcc5fa6
-title: Step 13
+title: Paso 13
 challengeType: 20
 dashedName: step-13
 ---
@@ -32,14 +32,14 @@ You should have `print(map(test, [2, 3, 5, 8]))` in your code.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
 
 def total_expenses(expenses):
     pass
-    
+
 --fcc-editable-region--
 test = lambda x: x * 2
 print(test(3))
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658238f7604f154ea9a23e1e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658238f7604f154ea9a23e1e.md
index 45d487652e1..60ba679d3b5 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658238f7604f154ea9a23e1e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658238f7604f154ea9a23e1e.md
@@ -1,6 +1,6 @@
 ---
 id: 658238f7604f154ea9a23e1e
-title: Step 14
+title: Paso 14
 challengeType: 20
 dashedName: step-14
 ---
@@ -26,14 +26,14 @@ You should print `sum(map(test, [2, 3, 5, 8]))`.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
 
 def total_expenses(expenses):
     pass
-    
+
 --fcc-editable-region--
 test = lambda x: x * 2
 print(map(test, [2, 3, 5, 8]))
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823b0167fd894f4a7ea60a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823b0167fd894f4a7ea60a.md
index 9d374a285ed..e1d13b5dc42 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823b0167fd894f4a7ea60a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823b0167fd894f4a7ea60a.md
@@ -1,6 +1,6 @@
 ---
 id: 65823b0167fd894f4a7ea60a
-title: Step 15
+title: Paso 15
 challengeType: 20
 dashedName: step-15
 ---
@@ -32,14 +32,14 @@ You should delete your `print(sum(map(test, [2, 3, 5, 8])))` call.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
 
 def total_expenses(expenses):
     pass
-    
+
 --fcc-editable-region--
 test = lambda x: x * 2
 print(sum(map(test, [2, 3, 5, 8])))
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
index 55df7c207a5..44d6692446d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
@@ -1,13 +1,13 @@
 ---
 id: 65823bbbdb4eaa4f9d20a0fb
-title: Step 16
+title: Paso 16
 challengeType: 20
 dashedName: step-16
 ---
 
 # --description--
 
-Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `amount` key in the `expense` dictionary.
+Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `'amount'` key in the `expense` dictionary.
 
 # --hints--
 
@@ -31,11 +31,11 @@ You should have `lambda expense: expense['amount']` in your `total_expenses` fun
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 --fcc-editable-region--
 def total_expenses(expenses):
     pass
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823cfc74aa564ffc460489.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823cfc74aa564ffc460489.md
index 8a3db21c131..c14302488a2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823cfc74aa564ffc460489.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823cfc74aa564ffc460489.md
@@ -1,6 +1,6 @@
 ---
 id: 65823cfc74aa564ffc460489
-title: Step 17
+title: Paso 17
 challengeType: 20
 dashedName: step-17
 ---
@@ -31,11 +31,11 @@ You should have `map(lambda expense: expense['amount'], expenses)` in your code.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 --fcc-editable-region--
 def total_expenses(expenses):
     lambda expense: expense['amount']
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823dde36392f505a39f7c7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823dde36392f505a39f7c7.md
index ad2613a1c8a..6089e18c010 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823dde36392f505a39f7c7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823dde36392f505a39f7c7.md
@@ -1,6 +1,6 @@
 ---
 id: 65823dde36392f505a39f7c7
-title: Step 18
+title: Paso 18
 challengeType: 20
 dashedName: step-18
 ---
@@ -31,11 +31,11 @@ You should return `sum(map(lambda expense: expense['amount'], expenses))` from y
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 --fcc-editable-region--
 def total_expenses(expenses):
     map(lambda expense: expense['amount'], expenses)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823e87c9741750a22085a7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823e87c9741750a22085a7.md
index dc868ffe2a1..4b5502289e6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823e87c9741750a22085a7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823e87c9741750a22085a7.md
@@ -1,6 +1,6 @@
 ---
 id: 65823e87c9741750a22085a7
-title: Step 19
+title: Paso 19
 challengeType: 20
 dashedName: step-19
 ---
@@ -39,14 +39,14 @@ Your `filter_expenses_by_category` function should take `expenses` and `category
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
index edc3ca9935f..78d8e942b1e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
@@ -1,13 +1,13 @@
 ---
 id: 65823ff0d4b991510fade1a8
-title: Step 20
+title: Paso 20
 challengeType: 20
 dashedName: step-20
 ---
 
 # --description--
 
-Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `category` key of the `expense` dictionary and `category`.
+Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `'category'` key of the `expense` dictionary and `category`.
 
 # --hints--
 
@@ -31,14 +31,14 @@ You should have `lambda expense: expense['category'] == category` inside the `fi
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 --fcc-editable-region--
 def filter_expenses_by_category(expenses, category):
     pass
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824111a09164518320088d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824111a09164518320088d.md
index 9d8861e0fd9..169d3df7aae 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824111a09164518320088d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824111a09164518320088d.md
@@ -1,13 +1,13 @@
 ---
 id: 65824111a09164518320088d
-title: Step 21
+title: Paso 21
 challengeType: 20
 dashedName: step-21
 ---
 
 # --description--
 
-The `filter()` function allows you to select items from an iterable, such as a list, based on the output of a function: 
+The `filter()` function allows you to select items from an iterable, such as a list, based on the output of a function:
 
 ```py
 filter(my_function, my_list)
@@ -39,14 +39,14 @@ You should have `filter(lambda expense: expense['category'] == category, expense
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 --fcc-editable-region--
 def filter_expenses_by_category(expenses, category):
     lambda expense: expense['category'] == category
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658244fdf4b0265334711664.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658244fdf4b0265334711664.md
index 2154fc972fc..dee4a956f26 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658244fdf4b0265334711664.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658244fdf4b0265334711664.md
@@ -1,6 +1,6 @@
 ---
 id: 658244fdf4b0265334711664
-title: Step 22
+title: Paso 22
 challengeType: 20
 dashedName: step-22
 ---
@@ -31,14 +31,14 @@ You should return the result of the `filter()` call from your `filter_expenses_b
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 --fcc-editable-region--
 def filter_expenses_by_category(expenses, category):
     filter(lambda expense: expense['category'] == category, expenses)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
index cad1f46acdd..30a0e655000 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
@@ -1,6 +1,6 @@
 ---
 id: 65824561f3478e5371a33ae5
-title: Step 23
+title: Paso 23
 challengeType: 20
 dashedName: step-23
 ---
@@ -23,7 +23,7 @@ You should define a function named `main()` without parameters.
 })
 ```
 
-You should move the `expense` list inside the `main()` function body.
+You should move the `expenses` list inside the `main()` function body.
 
 ```js
 ({ test: () => assert(__pyodide.runPython(`
@@ -41,14 +41,14 @@ You should move the `expense` list inside the `main()` function body.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
index ea141e73104..388663df27c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
@@ -1,6 +1,6 @@
 ---
 id: 658246c28575d653d1f89b59
-title: Step 24
+title: Paso 24
 challengeType: 20
 dashedName: step-24
 ---
@@ -14,7 +14,7 @@ while condition:
     <code>
 ```
 
-Below the `expense` list, create a `while` loop. Use `True` for the condition, and print the string `\nExpense Tracker` inside the loop body to show the title of the program.
+Below the `expenses` list, create a `while` loop. Use `True` for the condition, and print the string `'\nExpense Tracker'` inside the loop body to show the title of the program.
 
 # --hints--
 
@@ -51,19 +51,19 @@ You should have `print('\nExpense Tracker')` in your `while` loop.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
 --fcc-editable-region--
 def main():
     expenses = []
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
index f1da4c8ac5e..c0ddc3679e6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
@@ -1,15 +1,15 @@
 ---
 id: 65824872894f59546e3084e2
-title: Step 25
+title: Paso 25
 challengeType: 20
 dashedName: step-25
 ---
 
 # --description--
 
-The `while` loop you created in the previous step is an infinite loop that will allow the program to continuously present menu options until the user decides to exit. 
+The `while` loop you created in the previous step is an infinite loop that will allow the program to continuously present menu options until the user decides to exit.
 
-After the `print()` call, add another one to print the string `1. Add an expense`.
+After the `print()` call, add another one to print the string `'1. Add an expense'`.
 
 # --hints--
 
@@ -33,14 +33,14 @@ You should have `print('1. Add an expense')` in your `while` loop.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
 
@@ -49,6 +49,6 @@ def main():
 --fcc-editable-region--
     while True:
         print('\nExpense Tracker')
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
index b9c1394da24..ad76a183580 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
@@ -1,13 +1,13 @@
 ---
 id: 65824a1b16631c54fa524154
-title: Step 26
+title: Paso 26
 challengeType: 20
 dashedName: step-26
 ---
 
 # --description--
 
-Next, add another `print()` call and pass the string `2. List all expenses`.
+Next, add another `print()` call and pass the string `'2. List all expenses'`.
 
 # --hints--
 
@@ -31,14 +31,14 @@ You should have `print('2. List all expenses')` in your `while` loop.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
 
@@ -48,6 +48,6 @@ def main():
     while True:
         print('\nExpense Tracker')
         print('1. Add an expense')
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
index 1e88e2b1aaa..2f049902625 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
@@ -1,13 +1,13 @@
 ---
 id: 65824c7b4e2da85597693dcf
-title: Step 27
+title: Paso 27
 challengeType: 20
 dashedName: step-27
 ---
 
 # --description--
 
-Provide the other menu options by printing the following three strings in your `while` loop: `3. Show total expenses`, `4. Filter expenses by category`, and `5. Exit`.
+Provide the other menu options by printing the following three strings in your `while` loop: `'3. Show total expenses'`, `'4. Filter expenses by category'`, and `'5. Exit'`.
 
 # --hints--
 
@@ -57,14 +57,14 @@ You should have `print('5. Exit')` in your `while` loop.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
 
@@ -75,6 +75,6 @@ def main():
         print('\nExpense Tracker')
         print('1. Add an expense')
         print('2. List all expenses')
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
index 702bd977ad4..60e9338b06e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
@@ -1,6 +1,6 @@
 ---
 id: 65824dfdb6815d563b2d3256
-title: Step 28
+title: Paso 28
 challengeType: 20
 dashedName: step-28
 ---
@@ -9,7 +9,7 @@ dashedName: step-28
 
 The `input()` function takes a user input and it returns the user input in the form of a string.
 
-Inside your `while` loop, call the `input()` function passing the string `Enter your choice: ` as the argument, and assign the result to a variable named `choice`.
+Inside your `while` loop, call the `input()` function passing the string `'Enter your choice: '` as the argument, and assign the result to a variable named `choice`.
 
 # --hints--
 
@@ -33,17 +33,17 @@ You should have `choice = input('Enter your choice: ')` in your `while` loop.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 --fcc-editable-region--
 def main():
     expenses = []
@@ -54,6 +54,6 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
index 2d564d604aa..b67d227ed90 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
@@ -1,15 +1,15 @@
 ---
 id: 6582507654b3ed5712341382
-title: Step 29
+title: Paso 29
 challengeType: 20
 dashedName: step-29
 ---
 
 # --description--
 
-You are going to use conditional statements to check the user's choice. If the choice is `1`, it means the user wants to add an expense.
+You are going to use conditional statements to check the user's choice. If the choice is `'1'`, it means the user wants to add an expense.
 
-Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `1`. If it's true, it will be the starting point for adding a new expense.
+Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `'1'`. If it's true, it will be the starting point for adding a new expense.
 
 Inside the `if` statement body, declare a variable `amount` and assign it an empty `input()` call.
 
@@ -48,17 +48,17 @@ You should have `amount = input()` in your `if` statement body:
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 --fcc-editable-region--
 def main():
     expenses = []
@@ -69,7 +69,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
index c474338339c..7a485aef5e7 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
@@ -1,6 +1,6 @@
 ---
 id: 658252f6b1526d57b103d48a
-title: Step 30
+title: Paso 30
 challengeType: 20
 dashedName: step-30
 ---
@@ -9,7 +9,7 @@ dashedName: step-30
 
 Inside the `if` statement, you should ask the user to enter the amount for the expense and store it in a variable.
 
-Pass the string `Enter amount: ` to your empty `input()` call, so you can store the expense.
+Pass the string `'Enter amount: '` to your empty `input()` call, so you can store the expense.
 
 # --hints--
 
@@ -33,17 +33,17 @@ You should have `amount = input('Enter amount: ')` in your `if` statement.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 --fcc-editable-region--
 def main():
     expenses = []
@@ -54,9 +54,9 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
-        
+
         if choice == '1':
             amount = input()
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658254db6e12485a48130f57.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658254db6e12485a48130f57.md
index 3ac10338242..d032f832f39 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658254db6e12485a48130f57.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658254db6e12485a48130f57.md
@@ -1,6 +1,6 @@
 ---
 id: 658254db6e12485a48130f57
-title: Step 31
+title: Paso 31
 challengeType: 20
 dashedName: step-31
 ---
@@ -33,17 +33,17 @@ You should have `amount = float(input('Enter amount: '))` in your `if` statement
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 --fcc-editable-region--
 def main():
     expenses = []
@@ -54,9 +54,9 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
-        
+
         if choice == '1':
             amount = input('Enter amount: ')
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658255d5f955175b270f251d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658255d5f955175b270f251d.md
index 4a24dd06ee0..c04c59a722a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658255d5f955175b270f251d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658255d5f955175b270f251d.md
@@ -1,6 +1,6 @@
 ---
 id: 658255d5f955175b270f251d
-title: Step 32
+title: Paso 32
 challengeType: 20
 dashedName: step-32
 ---
@@ -31,17 +31,17 @@ You should have `category = input('Enter category: ')` in your `if` statement.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -52,11 +52,11 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 --fcc-editable-region--       
         if choice == '1':
             amount = float(input('Enter amount: '))
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582575b8089f85b8b92d7c8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582575b8089f85b8b92d7c8.md
index 588f91859d2..5355623d70f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582575b8089f85b8b92d7c8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582575b8089f85b8b92d7c8.md
@@ -1,6 +1,6 @@
 ---
 id: 6582575b8089f85b8b92d7c8
-title: Step 33
+title: Paso 33
 challengeType: 20
 dashedName: step-33
 ---
@@ -9,7 +9,7 @@ dashedName: step-33
 
 After getting the expense details, you need to call the `add_expense` function to add the new expense to the `expenses` list.
 
-After getting the `amount` and `category` using `input()`, call the `add_expense` function, passing three arguments: `expenses`, `amount` and `category`. 
+After getting the `amount` and `category` using `input()`, call the `add_expense` function, passing three arguments: `expenses`, `amount` and `category`.
 
 - `expenses` is the empty list created in the main function earlier in this project.
 - `amount` is the amount of the expense.
@@ -37,17 +37,17 @@ You should have `add_expense(expenses, amount, category)` in your `if` statement
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -58,12 +58,12 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 --fcc-editable-region--
         if choice == '1':
             amount = float(input('Enter amount: '))
             category = input('Enter category: ')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
index a31249a61ce..a0226a969c9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
@@ -1,6 +1,6 @@
 ---
 id: 658258c0e5fbe85c14c060cf
-title: Step 34
+title: Paso 34
 challengeType: 20
 dashedName: step-34
 ---
@@ -9,7 +9,7 @@ dashedName: step-34
 
 To list all expenses, you can use an `elif` statement after an `if` statement. The `elif` checks additional conditions and only works following an `if` statement.
 
-Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `\nAll Expenses:`.
+Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `'\nAll Expenses:'`.
 
 # --hints--
 
@@ -46,17 +46,17 @@ You should have `print('\nAll Expenses:')` inside your `elif` statement.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -67,13 +67,13 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 --fcc-editable-region--
         if choice == '1':
             amount = float(input('Enter amount: '))
             category = input('Enter category: ')
             add_expense(expenses, amount, category)
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825a9520a0795c8afbef50.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825a9520a0795c8afbef50.md
index 53051c73dc4..e90b505ac4b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825a9520a0795c8afbef50.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825a9520a0795c8afbef50.md
@@ -1,6 +1,6 @@
 ---
 id: 65825a9520a0795c8afbef50
-title: Step 35
+title: Paso 35
 challengeType: 20
 dashedName: step-35
 ---
@@ -31,17 +31,17 @@ You should have `print_expenses(expenses)` in your `elif` statement.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -52,7 +52,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -62,6 +62,6 @@ def main():
 --fcc-editable-region--
         elif choice == '2':
             print('\nAll Expenses:')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
index 78b93da8505..9d14ecf390c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
@@ -1,15 +1,15 @@
 ---
 id: 65825b758fe85a5cebabc8c5
-title: Step 36
+title: Paso 36
 challengeType: 20
 dashedName: step-36
 ---
 
 # --description--
 
-To show the total expenses, create an `elif` statement that checks if `choice == '3'`. 
+To show the total expenses, create an `elif` statement that checks if `choice == '3'`.
 
-If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `\nTotal Expenses: ` as the first argument and `total_expenses(expenses)` as the second argument.
+If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `'\nTotal Expenses: '` as the first argument and `total_expenses(expenses)` as the second argument.
 
 # --hints--
 
@@ -46,17 +46,17 @@ You should have `print('\nTotal Expenses: ', total_expenses(expenses))` in your
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -67,7 +67,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-       
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -78,6 +78,6 @@ def main():
         elif choice == '2':
             print('\nAll Expenses:')
             print_expenses(expenses)
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825cda2668995d5168e37c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825cda2668995d5168e37c.md
index d355dc243eb..fae0081026f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825cda2668995d5168e37c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825cda2668995d5168e37c.md
@@ -1,6 +1,6 @@
 ---
 id: 65825cda2668995d5168e37c
-title: Step 37
+title: Paso 37
 challengeType: 20
 dashedName: step-37
 ---
@@ -44,17 +44,17 @@ You should have `category = input('Enter category to filter: ')` in your new `el
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -65,7 +65,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-       
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -79,6 +79,6 @@ def main():
 --fcc-editable-region--           
         elif choice == '3':
             print('\nTotal Expenses: ', total_expenses(expenses))
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825e96b5db5f5dee6bf57c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825e96b5db5f5dee6bf57c.md
index 216df85146a..a404df06974 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825e96b5db5f5dee6bf57c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825e96b5db5f5dee6bf57c.md
@@ -1,6 +1,6 @@
 ---
 id: 65825e96b5db5f5dee6bf57c
-title: Step 38
+title: Paso 38
 challengeType: 20
 dashedName: step-38
 ---
@@ -31,17 +31,17 @@ You should print `f'\nExpenses for {category}:'` inside the `elif` statement.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -52,7 +52,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-       
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -69,6 +69,6 @@ def main():
 --fcc-editable-region--
         elif choice == '4':
             category = input('Enter category to filter: ')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582601b2987045e8e7da994.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582601b2987045e8e7da994.md
index 8f058be3798..5e2ee70237e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582601b2987045e8e7da994.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582601b2987045e8e7da994.md
@@ -1,6 +1,6 @@
 ---
 id: 6582601b2987045e8e7da994
-title: Step 39
+title: Paso 39
 challengeType: 20
 dashedName: step-39
 ---
@@ -31,17 +31,17 @@ You should have `expenses_from_category = filter_expenses_by_category(expenses,
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -52,7 +52,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -70,6 +70,6 @@ def main():
         elif choice == '4':
             category = input('Enter category to filter: ')
             print(f'\nExpenses for {category}:')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582622cb6c11a5f4c5d79b4.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582622cb6c11a5f4c5d79b4.md
index 77c98c73e8e..fdacce5a902 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582622cb6c11a5f4c5d79b4.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582622cb6c11a5f4c5d79b4.md
@@ -1,6 +1,6 @@
 ---
 id: 6582622cb6c11a5f4c5d79b4
-title: Step 40
+title: Paso 40
 challengeType: 20
 dashedName: step-40
 ---
@@ -31,17 +31,17 @@ You should have `print_expenses(expenses_from_category)` in your code.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -52,7 +52,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -71,6 +71,6 @@ def main():
             category = input('Enter category to filter: ')
             print(f'\nExpenses for {category}:')
             expenses_from_category = filter_expenses_by_category(expenses, category)
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
index 081b2682e6b..c9e7b7df3ba 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
@@ -1,15 +1,15 @@
 ---
 id: 6582687859366a618424d84b
-title: Step 41
+title: Paso 41
 challengeType: 20
 dashedName: step-41
 ---
 
 # --description--
 
-To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `5`.
+To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `'5'`.
 
-Inside the new `elif` statement, print the string `Exiting the program.` to show that the program is terminating its execution.
+Inside the new `elif` statement, print the string `'Exiting the program.'` to show that the program is terminating its execution.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `elif choice == '5':` in your code.
 })
 ```
 
-You should print `Exiting the program.` in your new `elif` statement.
+You should print `'Exiting the program.'` in your new `elif` statement.
 
 ```js
 ({ test: () =>
@@ -46,17 +46,17 @@ You should print `Exiting the program.` in your new `elif` statement.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -67,7 +67,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -87,6 +87,6 @@ def main():
             print(f'\nExpenses for {category}:')
             expenses_from_category = filter_expenses_by_category(expenses, category)
             print_expenses(expenses_from_category)
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826a6e9d189a623141c726.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826a6e9d189a623141c726.md
index 7829a742975..92bbafd81d0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826a6e9d189a623141c726.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826a6e9d189a623141c726.md
@@ -1,6 +1,6 @@
 ---
 id: 65826a6e9d189a623141c726
-title: Step 42
+title: Paso 42
 challengeType: 20
 dashedName: step-42
 ---
@@ -31,17 +31,17 @@ You should have a `break` statement inside your last `elif`.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -52,7 +52,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-       
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -75,6 +75,6 @@ def main():
 --fcc-editable-region--
         elif choice == '5':
             print('Exiting the program.')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826af5b226a5628aa154b1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826af5b226a5628aa154b1.md
index e5f24e2b1f8..75b4373ac3f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826af5b226a5628aa154b1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826af5b226a5628aa154b1.md
@@ -1,6 +1,6 @@
 ---
 id: 65826af5b226a5628aa154b1
-title: Step 43
+title: Paso 43
 challengeType: 20
 dashedName: step-43
 ---
@@ -24,17 +24,17 @@ assert.match(code, /^main\s*\(\s*\)/m)
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -45,7 +45,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-       
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -56,16 +56,16 @@ def main():
         elif choice == '2':
             print('\nAll Expenses:')
             print_expenses(expenses)
-    
+
         elif choice == '3':
             print('\nTotal Expenses: ', total_expenses(expenses))
-    
+
         elif choice == '4':
             category = input('Enter category to filter: ')
             print(f'\nExpenses for {category}:')
             expenses_from_category = filter_expenses_by_category(expenses, category)
             print_expenses(expenses_from_category)
-    
+
         elif choice == '5':
             print('Exiting the program.')
             break
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826befd75db5632bd73df6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826befd75db5632bd73df6.md
index 5daa9a4d51a..1eab4eaad61 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826befd75db5632bd73df6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826befd75db5632bd73df6.md
@@ -1,6 +1,6 @@
 ---
 id: 65826befd75db5632bd73df6
-title: Step 44
+title: Paso 44
 challengeType: 20
 dashedName: step-44
 ---
@@ -11,7 +11,7 @@ You can use the `__name__` variable to determine if a Python script is being run
 
 If the value of `__name__` is set to `'__main__'`, it implies that the current script is the main program, and not a module.
 
-As a final step, create an `if` statement to check if ` __name__ == '__main__'`, and move the `main()` call inside this block.
+As a final step, create an `if` statement to check if `__name__ == '__main__'`, and move the `main()` call inside this block.
 
 With that, the expense tracker project is complete!
 
@@ -36,17 +36,17 @@ assert.match(code, /^if\s+__name__\s*==\s*("|')__main__\1\s*:\s*main\s*\(\s*\)/m
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -57,7 +57,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -93,17 +93,17 @@ main()
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -114,7 +114,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657e928716b77b2277980276.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657e928716b77b2277980276.md
index 8a1f6be3110..0b8fdcd6f7b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657e928716b77b2277980276.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657e928716b77b2277980276.md
@@ -1,13 +1,13 @@
 ---
 id: 657e928716b77b2277980276
-title: Step 1
+title: Paso 1
 challengeType: 20
 dashedName: step-1
 ---
 
 # --description--
 
-In this project, you are going to learn about list comprehensions in Python by building a program that can take a `camelCase` or `PascalCase` formatted string and convert that to a `snake_case` formatted string. 
+In this project, you are going to learn about list comprehensions in Python by building a program that can take a `camelCase` or `PascalCase` formatted string and convert that to a `snake_case` formatted string.
 
 List comprehensions in Python are a concise way to construct a list without using loops or the `.append()` method. Apart from being briefer, list comprehensions often run faster.
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
index daf8861a4e4..06eedc50c1a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
@@ -1,6 +1,6 @@
 ---
 id: 657ed53c19461d4b95c4757a
-title: Step 2
+title: Paso 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -22,7 +22,7 @@ You should replace `pass` with an empty list named `snake_cased_char_list` withi
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\]/);
+        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\s*\]\s*/);
     }
 })
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ee28cefc4945568287673.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ee28cefc4945568287673.md
index 85d9fb395e5..a2c8e6078fa 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ee28cefc4945568287673.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ee28cefc4945568287673.md
@@ -1,6 +1,6 @@
 ---
 id: 657ee28cefc4945568287673
-title: Step 3
+title: Paso 3
 challengeType: 20
 dashedName: step-3
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ef2a86d4e545cec9a85fb.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ef2a86d4e545cec9a85fb.md
index 6b9b0f967ea..a7de7d4e9fd 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ef2a86d4e545cec9a85fb.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ef2a86d4e545cec9a85fb.md
@@ -1,6 +1,6 @@
 ---
 id: 657ef2a86d4e545cec9a85fb
-title: Step 4
+title: Paso 4
 challengeType: 20
 dashedName: step-4
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efa642593c5746acc5c81.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efa642593c5746acc5c81.md
index f93b3960971..4430191d833 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efa642593c5746acc5c81.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efa642593c5746acc5c81.md
@@ -1,6 +1,6 @@
 ---
 id: 657efa642593c5746acc5c81
-title: Step 5
+title: Paso 5
 challengeType: 20
 dashedName: step-5
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efce98e958b75df86b305.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efce98e958b75df86b305.md
index e9a0ec84990..f29c047eeb7 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efce98e958b75df86b305.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efce98e958b75df86b305.md
@@ -1,6 +1,6 @@
 ---
 id: 657efce98e958b75df86b305
-title: Step 6
+title: Paso 6
 challengeType: 20
 dashedName: step-6
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
index abdebbcec2b..c3cc044179c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
@@ -1,6 +1,6 @@
 ---
 id: 657efdcf7fe23b76c0cff9ec
-title: Step 7
+title: Paso 7
 challengeType: 20
 dashedName: step-7
 ---
@@ -34,7 +34,7 @@ You should use the `.append()` method to add `char` to the `snake_cased_char_lis
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list.append\(char\)/);
+        assert.match(function_body, / +snake_cased_char_list.append\(\s*char\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657effaa2a5e0277d71f9cbe.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657effaa2a5e0277d71f9cbe.md
index c2568eaacd0..20743b17fbc 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657effaa2a5e0277d71f9cbe.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657effaa2a5e0277d71f9cbe.md
@@ -1,6 +1,6 @@
 ---
 id: 657effaa2a5e0277d71f9cbe
-title: Step 8
+title: Paso 8
 challengeType: 20
 dashedName: step-8
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0044be09db790b1eb1c5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0044be09db790b1eb1c5.md
index 7c4f0407797..bb0cb5210a2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0044be09db790b1eb1c5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0044be09db790b1eb1c5.md
@@ -1,6 +1,6 @@
 ---
 id: 657f0044be09db790b1eb1c5
-title: Step 9
+title: Paso 9
 challengeType: 20
 dashedName: step-9
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f01ae9aea647b27402d3e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f01ae9aea647b27402d3e.md
index c6b3ba9bca8..907267703b7 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f01ae9aea647b27402d3e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f01ae9aea647b27402d3e.md
@@ -1,6 +1,6 @@
 ---
 id: 657f01ae9aea647b27402d3e
-title: Step 10
+title: Paso 10
 challengeType: 20
 dashedName: step-10
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f025ec86c3d7c4177b6be.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f025ec86c3d7c4177b6be.md
index d669609e5ce..3fabb3b169e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f025ec86c3d7c4177b6be.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f025ec86c3d7c4177b6be.md
@@ -1,6 +1,6 @@
 ---
 id: 657f025ec86c3d7c4177b6be
-title: Step 11
+title: Paso 11
 challengeType: 20
 dashedName: step-11
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
index 0c900c7d408..56ea61ee0cd 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
@@ -1,17 +1,17 @@
 ---
 id: 657f0353c9523d7d896873ea
-title: Step 12
+title: Paso 12
 challengeType: 20
 dashedName: step-12
 ---
 
 # --description--
 
-Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `aLongAndComplexString` as input to the function and print out the output using the `print()` function.
+Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `'aLongAndComplexString'` as input to the function and print out the output using the `print()` function.
 
 # --hints--
 
-You should call `convert_to_snake_case()` inside the `main()` function and pass `aLongAndComplexString` as input to the function.
+You should call `convert_to_snake_case()` inside the `main()` function and pass `'aLongAndComplexString'` as input to the function.
 
 ```js
 ({
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f04ed0035f47ed04d0f1f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f04ed0035f47ed04d0f1f.md
index 8a21f4cd44b..f7e12f7d29b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f04ed0035f47ed04d0f1f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f04ed0035f47ed04d0f1f.md
@@ -1,6 +1,6 @@
 ---
 id: 657f04ed0035f47ed04d0f1f
-title: Step 13
+title: Paso 13
 challengeType: 20
 dashedName: step-13
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f28a0482132aca51a9212.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f28a0482132aca51a9212.md
index 9e8e27fe86b..477326285db 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f28a0482132aca51a9212.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f28a0482132aca51a9212.md
@@ -1,6 +1,6 @@
 ---
 id: 657f28a0482132aca51a9212
-title: Step 14
+title: Paso 14
 challengeType: 20
 dashedName: step-14
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f425dbab54e11993c80f0.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f425dbab54e11993c80f0.md
index 6a719fd78d7..67ae8a4a258 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f425dbab54e11993c80f0.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f425dbab54e11993c80f0.md
@@ -1,6 +1,6 @@
 ---
 id: 657f425dbab54e11993c80f0
-title: Step 15
+title: Paso 15
 challengeType: 20
 dashedName: step-15
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4345abe7f2161f99f1ad.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4345abe7f2161f99f1ad.md
index 9c054d264db..b8f546c074c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4345abe7f2161f99f1ad.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4345abe7f2161f99f1ad.md
@@ -1,6 +1,6 @@
 ---
 id: 657f4345abe7f2161f99f1ad
-title: Step 16
+title: Paso 16
 challengeType: 20
 dashedName: step-16
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f43d341a0dd17120cdb08.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f43d341a0dd17120cdb08.md
index a2969fc86c2..44c17673daa 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f43d341a0dd17120cdb08.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f43d341a0dd17120cdb08.md
@@ -1,6 +1,6 @@
 ---
 id: 657f43d341a0dd17120cdb08
-title: Step 17
+title: Paso 17
 challengeType: 20
 dashedName: step-17
 ---
@@ -51,7 +51,7 @@ def convert_to_snake_case(pascal_or_camel_cased_string):
 
 --fcc-editable-region--
     snake_cased_char_list = [
-        
+
     ]
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f456223b8c1187b461987.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f456223b8c1187b461987.md
index 74e7eb70237..7e3cd6f3449 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f456223b8c1187b461987.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f456223b8c1187b461987.md
@@ -1,6 +1,6 @@
 ---
 id: 657f456223b8c1187b461987
-title: Step 18
+title: Paso 18
 challengeType: 20
 dashedName: step-18
 ---
@@ -53,7 +53,7 @@ def convert_to_snake_case(pascal_or_camel_cased_string):
 --fcc-editable-region--
     snake_cased_char_list = [
         '_' + char.lower() if char.isupper()
-        
+
     ]
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f465f8e718b19c5105ae5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f465f8e718b19c5105ae5.md
index 6226601329c..54a904e4684 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f465f8e718b19c5105ae5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f465f8e718b19c5105ae5.md
@@ -1,6 +1,6 @@
 ---
 id: 657f465f8e718b19c5105ae5
-title: Step 19
+title: Paso 19
 challengeType: 20
 dashedName: step-19
 ---
@@ -61,7 +61,7 @@ def convert_to_snake_case(pascal_or_camel_cased_string):
     snake_cased_char_list = [
         '_' + char.lower() if char.isupper()
         else char
-        
+
     ]
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f47b12c51e41b3149e584.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f47b12c51e41b3149e584.md
index d159feeb1f4..55fd0b9f7b5 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f47b12c51e41b3149e584.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f47b12c51e41b3149e584.md
@@ -1,6 +1,6 @@
 ---
 id: 657f47b12c51e41b3149e584
-title: Step 20
+title: Paso 20
 challengeType: 20
 dashedName: step-20
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4a4a5828a01de04b652f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4a4a5828a01de04b652f.md
index 084e1d1686d..40a88e58667 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4a4a5828a01de04b652f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4a4a5828a01de04b652f.md
@@ -1,6 +1,6 @@
 ---
 id: 657f4a4a5828a01de04b652f
-title: Step 21
+title: Paso 21
 challengeType: 20
 dashedName: step-21
 ---
@@ -19,7 +19,7 @@ You should not have any commented line of code in the `convert_to_snake_case()`
         const transformedCode = code.replace(/\r/g, "");
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
-        
+
         assert.equal(function_body.split("#").length - 1, 0);
     }
 })
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
index 70ee44a6101..99ff3fb480d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
@@ -1,13 +1,13 @@
 ---
 id: 657f4add33ea4b1f61ba3dc8
-title: Step 22
+title: Paso 22
 challengeType: 20
 dashedName: step-22
 ---
 
 # --description--
 
-Finally try out this new implementation by executing the program. Change the input string to `IAmAPascalCasedString` and see if it comes out as `i_am_a_pascal_cased_string`, even though that's a lie.
+Finally try out this new implementation by executing the program. Change the input string to `'IAmAPascalCasedString'` and see if it comes out as `'i_am_a_pascal_cased_string'`, even though that's a lie.
 
 If you've done everything correctly, you should see the input string converted into snake case, like before.
 
@@ -15,7 +15,7 @@ Congratulations! Now your `convert_to_snake_case()` function is ready.
 
 # --hints--
 
-You should change the input string from `aLongAndComplexString` to `IAmAPascalCasedString` inside the `main()` function.
+You should change the input string from `'aLongAndComplexString'` to `'IAmAPascalCasedString'` inside the `main()` function.
 
 ```js
 ({
@@ -24,7 +24,7 @@ You should change the input string from `aLongAndComplexString` to `IAmAPascalCa
         const main = __helpers.python.getDef("\n" + transformedCode, "main");
         const { function_body } = main;
 
-        assert.match(function_body, / +print\(convert_to_snake_case\('IAmAPascalCasedString'\)\)/);
+        assert.match(function_body, / +print\(\s*convert_to_snake_case\(\s*'IAmAPascalCasedString'\s*\)\s*\)/);
     }
 })
 ```
@@ -48,7 +48,7 @@ def convert_to_snake_case(pascal_or_camel_cased_string):
 def main():
     print(convert_to_snake_case('aLongAndComplexString'))
 
-    
+
 --fcc-editable-region--
 
 if __name__ == '__main__':
@@ -71,7 +71,7 @@ def convert_to_snake_case(pascal_or_camel_cased_string):
 def main():
     print(convert_to_snake_case('IAmAPascalCasedString'))
 
-    
+
 
 if __name__ == '__main__':
     main()
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8b1faf9c60304ca8a9b6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8b1faf9c60304ca8a9b6.md
index 0a6e4c3f360..262b415976f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8b1faf9c60304ca8a9b6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8b1faf9c60304ca8a9b6.md
@@ -1,6 +1,6 @@
 ---
 id: 64dc8b1faf9c60304ca8a9b6
-title: Step 1
+title: Paso 1
 challengeType: 20
 dashedName: step-1
 ---
@@ -11,7 +11,7 @@ In this project, you will solve the mathematical puzzle known as the Tower of Ha
 
 The goal of this puzzle is moving the disks from the first rod to the third rod, following specific rules that restrict placing a larger disk on top of a smaller one.
 
-Start by creating an empty dictionary named `rods` to represent the rods. 
+Start by creating an empty dictionary named `rods` to represent the rods.
 
 # --hints--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
index 857f79329f6..c9f537a8074 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
@@ -1,15 +1,15 @@
 ---
 id: 64dc8ea01436383a88256d7f
-title: Step 3
+title: Paso 3
 challengeType: 20
 dashedName: step-3
 ---
 
 # --description--
 
-The puzzle starts with the disks piled up on the first rod, in decreasing size. You need to populate your first list with numbers representing the various disk sizes.
+The puzzle starts with the disks piled up on the first rod, in decreasing size, with the smallest disk on top and the largest disk on the bottom. You need to populate your first list with numbers representing the various disk sizes.
 
-Instead of adding the items manually to the first list, generate a sequence of numbers from `3` to `1` by using the `range()` function and assign it to `rods['A']`.
+Instead of adding the items manually to the first list, generate a sequence of numbers counting down from `3` to `1` by using the `range()` function and assign it to `rods['A']`. Here, `3` represents the largest disk at the bottom of the pile and `1` represents the smallest disk at the top of the pile.
 
 The syntax is `range(x, y, h)`, where `x` is the starting integer (inclusive), `y` is the last integer (not inclusive), and `h` is the difference between a number and the next one in the sequence.
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
index cd3d851a1e7..87283ba1dfd 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
@@ -1,6 +1,6 @@
 ---
 id: 64dc9004f658183afa85f4f1
-title: Step 4
+title: Paso 4
 challengeType: 20
 dashedName: step-4
 ---
@@ -14,13 +14,13 @@ Now check the data type of your `'A'` key by passing it to the `type()` function
 You should pass your `'A'` key to the `type()` function.
 
 ```js
-({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)/) })
+({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)/) })
 ```
 
 You should print the type of `rods['A']` using the `print()` function.
 
 ```js
-({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)\s*\)/) })
+({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90949ff85e3b37be40d0.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90949ff85e3b37be40d0.md
index 67468ce118b..a16d0927777 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90949ff85e3b37be40d0.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90949ff85e3b37be40d0.md
@@ -1,6 +1,6 @@
 ---
 id: 64dc90949ff85e3b37be40d0
-title: Step 5
+title: Paso 5
 challengeType: 20
 dashedName: step-5
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
index 05ae3785d68..328ad624f29 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
@@ -1,6 +1,6 @@
 ---
 id: 64dc90e837670a3ba26a1e61
-title: Step 6
+title: Paso 6
 challengeType: 20
 dashedName: step-6
 ---
@@ -14,7 +14,7 @@ Now that the type is `list` as required, you can remove the `print()` call.
 You should remove `print(type(rods['A']))` from your code.
 
 ```js
-({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
+({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc916138dbe03bdfe6cec6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc916138dbe03bdfe6cec6.md
index 5fe2565b412..fa172318935 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc916138dbe03bdfe6cec6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc916138dbe03bdfe6cec6.md
@@ -1,6 +1,6 @@
 ---
 id: 64dc916138dbe03bdfe6cec6
-title: Step 7
+title: Paso 7
 challengeType: 20
 dashedName: step-7
 ---
@@ -21,11 +21,11 @@ You should declare an empty function named `move`. Remember to use the `pass` ke
 
 ```js
 ({ test: () => {
-		assert(__pyodide.runPython(`
+        assert(__pyodide.runPython(`
         import inspect
         inspect.isfunction(__locals.get('move'))
     `))
-	} 
+    } 
 })
 ```
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc922df2919e3c38cead61.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc922df2919e3c38cead61.md
index 5085d444246..f97ef408cd8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc922df2919e3c38cead61.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc922df2919e3c38cead61.md
@@ -1,6 +1,6 @@
 ---
 id: 64dc922df2919e3c38cead61
-title: Step 8
+title: Paso 8
 challengeType: 20
 dashedName: step-8
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc92a9718fb53ca3d1bad7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc92a9718fb53ca3d1bad7.md
index 2cab8031321..6ce90c5caaf 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc92a9718fb53ca3d1bad7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc92a9718fb53ca3d1bad7.md
@@ -1,6 +1,6 @@
 ---
 id: 64dc92a9718fb53ca3d1bad7
-title: Step 9
+title: Paso 9
 challengeType: 20
 dashedName: step-9
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc963d866fff3dd0329993.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc963d866fff3dd0329993.md
index a31564dd6ce..c42420ca45a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc963d866fff3dd0329993.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc963d866fff3dd0329993.md
@@ -1,6 +1,6 @@
 ---
 id: 64dc963d866fff3dd0329993
-title: Step 10
+title: Paso 10
 challengeType: 20
 dashedName: step-10
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97005bc7943e2978df0a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97005bc7943e2978df0a.md
index f80c73f1565..dd5f553834d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97005bc7943e2978df0a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97005bc7943e2978df0a.md
@@ -1,6 +1,6 @@
 ---
 id: 64dc97005bc7943e2978df0a
-title: Step 11
+title: Paso 11
 challengeType: 20
 dashedName: step-11
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc976bf864693e668d67e8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc976bf864693e668d67e8.md
index a8896153c0d..fbd303db6cf 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc976bf864693e668d67e8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc976bf864693e668d67e8.md
@@ -1,6 +1,6 @@
 ---
 id: 64dc976bf864693e668d67e8
-title: Step 12
+title: Paso 12
 challengeType: 20
 dashedName: step-12
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
index 78e19cd852c..34cb05caf2b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
@@ -1,6 +1,6 @@
 ---
 id: 64dc97ab25730b3e9de86ea5
-title: Step 16
+title: Paso 16
 challengeType: 20
 dashedName: step-16
 ---
@@ -9,7 +9,7 @@ dashedName: step-16
 
 At the end of this project, you will create a recursive solution to the Tower of Hanoi puzzle, but now you are going to explore an iterative approach to this problem.
 
-Start by adding a `for` loop to your function that iterates through the number of moves and prints the current iteration number.
+Start by adding a `for` loop to your function that iterates through the `number_of_moves` and prints the current iteration number.
 
 # --hints--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc985e6720a23edac63b51.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc985e6720a23edac63b51.md
index f6b5ed22152..e053ed965b2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc985e6720a23edac63b51.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc985e6720a23edac63b51.md
@@ -1,6 +1,6 @@
 ---
 id: 64dc985e6720a23edac63b51
-title: Step 17
+title: Paso 17
 challengeType: 20
 dashedName: step-17
 ---
@@ -13,7 +13,7 @@ Inside the previously created `for` loop, replace the existing `print()` call wi
 
 # --hints--
 
-You should have an `if` statement that should be executed when `(i + 1) % 3 == 1`. 
+You should have an `if` statement that should be executed when `(i + 1) % 3 == 1`.
 
 ```js
 ({test: () => assert.match(code, /if\s+\(\s*i\s*\+\s*1\s*\)\s*%\s*3\s*==\s*1\s*:/)})
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
index 48fac138222..79f84eae17b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
@@ -1,25 +1,25 @@
 ---
 id: 64dcd3d61c448e2676501f43
-title: Step 20
+title: Paso 20
 challengeType: 20
 dashedName: step-20
 ---
 
 # --description--
 
-When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `A` and `B` (the source and the auxiliary rods).
+When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `'A'` and `'B'` (the source and the auxiliary rods).
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
 # --hints--
 
-You should have an `elif` statement to execute when `remainder == 2`. 
+You should have an `elif` statement to execute when `remainder == 2`.
 
 ```js
 ({test: () => assert.match(code, /elif\s+remainder\s*==\s*2:/)})
 ```
 
-You should print the string `f'Move {i + 1} allowed between {source} and {auxiliary}'`. 
+You should print the string `f'Move {i + 1} allowed between {source} and {auxiliary}'`.
 
 ```js
 ({test: () => assert.match(code, /print\s*\(\s*f('|")Move\s\{\s*i\s*\+\s*1\s*\}\sallowed\sbetween\s\{\s*source\s*\}\sand\s\{\s*auxiliary\s*\s*\}\1\s*\)/)})
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
index 3e5079b3d22..9aa9158d689 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
@@ -1,25 +1,25 @@
 ---
 id: 64dcd9bbc2268127e7898d77
-title: Step 21
+title: Paso 21
 challengeType: 20
 dashedName: step-21
 ---
 
 # --description--
 
-Finally, when the move number divided by 3 has no remainder, the movement is allowed between `B` and `C`.
+Finally, when the move number divided by 3 has no remainder, the movement is allowed between `'B'` and `'C'`.
 
-Add an `elif` statement for that. Then, print the appropriate string if the condition is met. 
+Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
 # --hints--
 
-You should have an `elif` statement to execute when `remainder == 0`. 
+You should have an `elif` statement to execute when `remainder == 0`.
 
 ```js
 ({test: () => assert.match(code, /elif\s+remainder\s*==\s*0\s*:/)})
 ```
 
-You should print the string `f'Move {i + 1} allowed between {auxiliary} and {target}'`. 
+You should print the string `f'Move {i + 1} allowed between {auxiliary} and {target}'`.
 
 ```js
 ({test: () => assert.match(code, /print\s*\(\s*f('|")Move\s\{\s*i\s*\+\s*1\s*\}\sallowed\sbetween\s\{\s*auxiliary\s*\}\sand\s\{\s*target\s*\s*\}\1\s*\)/)})
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcdee07a14f0299ec30559.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcdee07a14f0299ec30559.md
index 330e5ce3d33..ad5495031b1 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcdee07a14f0299ec30559.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcdee07a14f0299ec30559.md
@@ -1,14 +1,13 @@
 ---
 id: 64dcdee07a14f0299ec30559
-title: Step 22
+title: Paso 22
 challengeType: 20
 dashedName: step-22
 ---
 
 # --description--
 
-You wrote the code to find the allowed movement between the rods, but the actual move could be in both directions.
-After the `print()` call, declare a variable named `forward` and set it to `False`. You will use that variable to check in which direction you need to move the disk between the rods.
+You wrote the code to find the allowed movement between the rods, but the actual move could be in both directions. After the `print()` call, declare a variable named `forward` and set it to `False`. You will use that variable to check in which direction you need to move the disk between the rods.
 
 # --hints--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce5f6ff907c2b2c47bb05.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce5f6ff907c2b2c47bb05.md
index 3c9ecac89e3..196c9704490 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce5f6ff907c2b2c47bb05.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce5f6ff907c2b2c47bb05.md
@@ -1,6 +1,6 @@
 ---
 id: 64dce5f6ff907c2b2c47bb05
-title: Step 23
+title: Paso 23
 challengeType: 20
 dashedName: step-23
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
index 6d97da81775..af545fb533e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
@@ -1,6 +1,6 @@
 ---
 id: 64dce7ee2494e82bf4205a3f
-title: Step 24
+title: Paso 24
 challengeType: 20
 dashedName: step-24
 ---
@@ -18,10 +18,10 @@ You should have an `elif` statement to check if `rods[source]` is not empty and
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:`);
 assert.match(code, re);
 ```
 
@@ -30,10 +30,10 @@ You should set `forward` to `True` inside your new `elif` statement. You should
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
 assert.match(code, re);
 ```
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
index 93dec13ccd1..b985ba28d9f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
@@ -1,6 +1,6 @@
 ---
 id: 64dceadec3c9cf2ca7b56de6
-title: Step 25
+title: Paso 25
 challengeType: 20
 dashedName: step-25
 ---
@@ -20,7 +20,7 @@ You should add an `if` statement to execute when `forward` is `True` after the `
 You should print the provide string inside your new `if` statement.
 
 ```js
-({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
+({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
index e6589376ba2..cfbbe3ac38e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
@@ -1,6 +1,6 @@
 ---
 id: 64ddcc2ee182e0164c3539f8
-title: Step 26
+title: Paso 26
 challengeType: 20
 dashedName: step-26
 ---
@@ -14,13 +14,13 @@ After printing the move, you need to remove the last element from the source rod
 You should remove the last element from `rods[source]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[target].append(rods[source].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
index 62cf87ba6d8..987c3fb4bc5 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
@@ -1,6 +1,6 @@
 ---
 id: 64ddce6f6e8066173208235b
-title: Step 27
+title: Paso 27
 challengeType: 20
 dashedName: step-27
 ---
@@ -14,25 +14,25 @@ When `forward` is `False`, the disk has to be moved in the opposite direction. W
 You should have an `else` clause to move the disks in the opposite direction.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
 ```
 
 You should have `print(f'Moving disk {rods[target][-1]} from {target} to {source}')` inside your `else` clause.
 
 ```js
-({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
+({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
 ```
 
 You should remove the last element from `rods[target]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[source].append(rods[target].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
index 77ba3efe01b..420a798c1dd 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
@@ -1,6 +1,6 @@
 ---
 id: 64ddd02838f36117cd9738eb
-title: Step 28
+title: Paso 28
 challengeType: 20
 dashedName: step-28
 ---
@@ -14,13 +14,13 @@ Outside the `else` block, add a comment saying `display our progress` and print
 You should use the provided text to add a comment outside the `else` block.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
 ```
 
 You should print the `rods` object outside the `else` block, after the comment.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd280d69fa818ca782d50.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd280d69fa818ca782d50.md
index 49989e6652b..49af16e018a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd280d69fa818ca782d50.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd280d69fa818ca782d50.md
@@ -1,14 +1,13 @@
 ---
 id: 64ddd280d69fa818ca782d50
-title: Step 29
+title: Paso 29
 challengeType: 20
 dashedName: step-29
 ---
 
 # --description--
 
-As you can see, disk 1 is going back and forth every three moves. This happens because you still need to take care of movements between the other rods.
-Instead of repeating the same code you wrote during the previous few steps and changing the rods, it would be better to move that code inside a function to call in each conditional statement. Declare an empty function named `make_allowed_move()` and don't forget the `pass` keyword.
+As you can see, disk 1 is going back and forth every three moves. This happens because you still need to take care of movements between the other rods. Instead of repeating the same code you wrote during the previous few steps and changing the rods, it would be better to move that code inside a function to call in each conditional statement. Declare an empty function named `make_allowed_move()` and don't forget the `pass` keyword.
 
 # --hints--
 
@@ -56,7 +55,7 @@ def move(n, source, auxiliary, target):
             else:
                 print(f'Moving disk {rods[target][-1]} from {target} to {source}')
                 rods[source].append(rods[target].pop())
-            
+
             # display our progress
             print(rods)
         elif remainder == 2:
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd4fbb4b598199acf5ec5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd4fbb4b598199acf5ec5.md
index 246bce0fde8..6480ea0a21d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd4fbb4b598199acf5ec5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd4fbb4b598199acf5ec5.md
@@ -1,6 +1,6 @@
 ---
 id: 64ddd4fbb4b598199acf5ec5
-title: Step 30
+title: Paso 30
 challengeType: 20
 dashedName: step-30
 ---
@@ -56,7 +56,7 @@ def move(n, source, auxiliary, target):
             else:
                 print(f'Moving disk {rods[target][-1]} from {target} to {source}')
                 rods[source].append(rods[target].pop())
-            
+
             # display our progress
             print(rods)
         elif remainder == 2:
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
index 916775d2c17..e1345223ec2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
@@ -1,14 +1,13 @@
 ---
 id: 64ddd65848a12919d7e1c7d0
-title: Step 31
+title: Paso 31
 challengeType: 20
 dashedName: step-31
 ---
 
 # --description--
 
-It's time to move some code from the `move()` function to the `make_allowed_move()` function. Move the code nested inside the first `if` statement (except the first `print()` call) to your new function. Pay close attention to the indentation.
-Don't forget to remove the `pass` keyword.
+It's time to move some code from the `move()` function to the `make_allowed_move()` function. Move the code nested inside the first `if` statement (except the first `print()` call) to your new function. Pay close attention to the indentation. Don't forget to remove the `pass` keyword.
 
 # --hints--
 
@@ -16,7 +15,7 @@ You should move the code nested inside the first `if` statement (except the firs
 
 ```js
 ({ test: () => {
-  assert.match(code, /def\s+make_allowed_move\(rod1, rod2\):\s+forward\s+=\s+False\s+if\s+not\s+rods\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\[\s*source\s*\]\s+and\s+rods\[\s*source\s*\]\[-1\]\s<\srods\[\s*target\s*\]\[\s*-\s*1\s*\]:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\[\s*source\s*\].append\(\s*rods\[\s*target\s*\].pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+\print\(\s*rods\s*\)/);
+  assert.match(code, /def\s+make_allowed_move\(\s*rod1, rod2\s*\):\s+forward\s+=\s+False\s+if\s+not\s+rods\s*\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\s*\[\s*source\s*\]\s+and\s+rods\s*\[\s*source\s*\]\s*\[\s*-1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\s*\[\s*source\s*\]\s*\.append\(\s*rods\s*\[\s*target\s*\]\s*\.pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\(\s*rods\s*\)/);
   }
 })
 ```
@@ -48,17 +47,17 @@ def move(n, source, auxiliary, target):
             if not rods[target]:
                 forward = True
             elif rods[source] and rods[source][-1] < rods[target][-1]:
-                forward = True              
+                forward = True
             if forward:
                 print(f'Moving disk {rods[source][-1]} from {source} to {target}')
                 rods[target].append(rods[source].pop())
             else:
                 print(f'Moving disk {rods[target][-1]} from {target} to {source}')
                 rods[source].append(rods[target].pop())
-            
+
             # display our progress
             print(rods)
---fcc-editable-region--            
+--fcc-editable-region--
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
         elif remainder == 0:
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de1469fccce61940f498c4.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de1469fccce61940f498c4.md
index e63a8498956..9c92ca66210 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de1469fccce61940f498c4.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de1469fccce61940f498c4.md
@@ -1,6 +1,6 @@
 ---
 id: 64de1469fccce61940f498c4
-title: Step 2
+title: Paso 2
 challengeType: 20
 dashedName: step-2
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de4bccf5becb208a48ca97.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de4bccf5becb208a48ca97.md
index b2bd5178061..cb33ac9b847 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de4bccf5becb208a48ca97.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de4bccf5becb208a48ca97.md
@@ -1,6 +1,6 @@
 ---
 id: 64de4bccf5becb208a48ca97
-title: Step 13
+title: Paso 13
 challengeType: 20
 dashedName: step-13
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
index f9e67e73136..9f5916ed4d2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
@@ -1,6 +1,6 @@
 ---
 id: 64de6c8a5305d8173a3a9e09
-title: Step 32
+title: Paso 32
 challengeType: 20
 dashedName: step-32
 ---
@@ -15,11 +15,11 @@ You should change each occurrence of `source` inside the `make_allowed_move()` f
 
 ```js
 ({ test: () => {
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
@@ -48,7 +48,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[target][-1]} from {target} to {source}')
         rods[source].append(rods[target].pop())
-    
+
     # display our progress
     print(rods)
 --fcc-editable-region--    
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
index 8fddbd21dfd..4f1dca74640 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
@@ -1,6 +1,6 @@
 ---
 id: 64de7357cc75bd18bdced920
-title: Step 33
+title: Paso 33
 challengeType: 20
 dashedName: step-33
 ---
@@ -16,11 +16,11 @@ You should change each occurrence of `target` inside `make_allowed_move` into `r
 ```js
 ({ test: () => {
   assert.match(code, /if\s+not\s+rods\s*\[\s*rod2\s*\]\s*:/);
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\[\s*rod2\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*rod2\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\s*\[\s*rod2\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod2\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
@@ -49,7 +49,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[target][-1]} from {target} to {rod1}')
         rods[rod1].append(rods[target].pop())
-    
+
     # display our progress
     print(rods)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de73f6c2486518e3064fec.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de73f6c2486518e3064fec.md
index a22bece1f64..18f62ec2cf9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de73f6c2486518e3064fec.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de73f6c2486518e3064fec.md
@@ -1,6 +1,6 @@
 ---
 id: 64de73f6c2486518e3064fec
-title: Step 34
+title: Paso 34
 challengeType: 20
 dashedName: step-34
 ---
@@ -42,7 +42,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods)
 
@@ -54,7 +54,7 @@ def move(n, source, auxiliary, target):
 --fcc-editable-region--    
         if remainder == 1:
             print(f'Move {i + 1} allowed between {source} and {target}')
-            
+
 --fcc-editable-region--            
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7662244db513d7b673ec.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7662244db513d7b673ec.md
index 3e9f4c9a995..e8e0072f383 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7662244db513d7b673ec.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7662244db513d7b673ec.md
@@ -1,6 +1,6 @@
 ---
 id: 64de7662244db513d7b673ec
-title: Step 35
+title: Paso 35
 challengeType: 20
 dashedName: step-35
 ---
@@ -50,7 +50,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods)
 
@@ -65,10 +65,10 @@ def move(n, source, auxiliary, target):
             make_allowed_move(source, target)
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
-            
+
         elif remainder == 0:
             print(f'Move {i + 1} allowed between {auxiliary} and {target}')
-            
+
 --fcc-editable-region--
 
 # initiate call from source A to target C with auxiliary B
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
index ce6e0756762..3eea54eb9cf 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
@@ -1,6 +1,6 @@
 ---
 id: 64de773f81facd14653f49c8
-title: Step 36
+title: Paso 36
 challengeType: 20
 dashedName: step-36
 ---
@@ -11,7 +11,7 @@ It looks like it's working! But the output is not very readable. Print a new lin
 
 # --hints--
 
-You should pass a string with a new line character (`\n`) as the second argument for your two `print(rods)` calls.
+You should pass a string with a new line character (`'\n'`) as the second argument for your two `print(rods)` calls.
 
 ```js
 ({ test: () => assert.match(code, /print\(\s*rods\s*,\s*('|")\\n\1\s*\)(?=.*print\(\s*rods\s*,\s*('|")\\n\2\s*\))/s) })
@@ -36,7 +36,7 @@ def make_allowed_move(rod1, rod2):
         forward = True
     elif rods[rod1] and rods[rod1][-1] < rods[rod2][-1]:
         forward = True
-                      
+
     if forward:
         print(f'Moving disk {rods[rod1][-1]} from {rod1} to {rod2}')
         rods[rod2].append(rods[rod1].pop())
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de79de2fac6b1536ebcfdd.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de79de2fac6b1536ebcfdd.md
index ac345377f48..c073a94137c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de79de2fac6b1536ebcfdd.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de79de2fac6b1536ebcfdd.md
@@ -1,6 +1,6 @@
 ---
 id: 64de79de2fac6b1536ebcfdd
-title: Step 37
+title: Paso 37
 challengeType: 20
 dashedName: step-37
 ---
@@ -38,14 +38,14 @@ def make_allowed_move(rod1, rod2):
         forward = True
     elif rods[rod1] and rods[rod1][-1] < rods[rod2][-1]:
         forward = True      
-                
+
     if forward:
         print(f'Moving disk {rods[rod1][-1]} from {rod1} to {rod2}')
         rods[rod2].append(rods[rod1].pop())
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7be06eb689161dd63cf0.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7be06eb689161dd63cf0.md
index e3d940bf26f..384798a5536 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7be06eb689161dd63cf0.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7be06eb689161dd63cf0.md
@@ -1,6 +1,6 @@
 ---
 id: 64de7be06eb689161dd63cf0
-title: Step 38
+title: Paso 38
 challengeType: 20
 dashedName: step-38
 ---
@@ -38,14 +38,14 @@ def make_allowed_move(rod1, rod2):
         forward = True
     elif rods[rod1] and rods[rod1][-1] < rods[rod2][-1]:
         forward = True
-                      
+
     if forward:
         print(f'Moving disk {rods[rod1][-1]} from {rod1} to {rod2}')
         rods[rod2].append(rods[rod1].pop())
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
@@ -56,7 +56,7 @@ def move(n, source, auxiliary, target):
         remainder = (i + 1) % 3
 --fcc-editable-region--     
         if remainder == 1:
-            
+
             print(f'Move {i + 1} allowed between {source} and {target}')
             make_allowed_move(source, target)
 --fcc-editable-region--            
@@ -66,7 +66,7 @@ def move(n, source, auxiliary, target):
         elif remainder == 0:
             print(f'Move {i + 1} allowed between {auxiliary} and {target}')
             make_allowed_move(auxiliary, target)
-           
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df202aa1342114cd077920.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df202aa1342114cd077920.md
index 1a99925d19d..6a753cda5ba 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df202aa1342114cd077920.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df202aa1342114cd077920.md
@@ -1,6 +1,6 @@
 ---
 id: 64df202aa1342114cd077920
-title: Step 39
+title: Paso 39
 challengeType: 20
 dashedName: step-39
 ---
@@ -64,7 +64,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
@@ -78,7 +78,7 @@ def move(n, source, auxiliary, target):
             if n % 2 != 0:
                 print(f'Move {i + 1} allowed between {source} and {target}')
                 make_allowed_move(source, target)
-            
+
 --fcc-editable-region--            
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
@@ -86,7 +86,7 @@ def move(n, source, auxiliary, target):
         elif remainder == 0:
             print(f'Move {i + 1} allowed between {auxiliary} and {target}')
             make_allowed_move(auxiliary, target)
-           
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df332162988b13c35b7f7d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df332162988b13c35b7f7d.md
index 9a98f3fe69f..4af862096f2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df332162988b13c35b7f7d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df332162988b13c35b7f7d.md
@@ -1,6 +1,6 @@
 ---
 id: 64df332162988b13c35b7f7d
-title: Step 40
+title: Paso 40
 challengeType: 20
 dashedName: step-40
 ---
@@ -39,14 +39,14 @@ def make_allowed_move(rod1, rod2):
         forward = True
     elif rods[rod1] and rods[rod1][-1] < rods[rod2][-1]:
         forward = True
-                      
+
     if forward:
         print(f'Moving disk {rods[rod1][-1]} from {rod1} to {rod2}')
         rods[rod2].append(rods[rod1].pop())
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
@@ -71,7 +71,7 @@ def move(n, source, auxiliary, target):
         elif remainder == 0:
             print(f'Move {i + 1} allowed between {auxiliary} and {target}')
             make_allowed_move(auxiliary, target)
-           
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df346f4c86461419974c1e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df346f4c86461419974c1e.md
index b181672f399..7766f2df9d0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df346f4c86461419974c1e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df346f4c86461419974c1e.md
@@ -1,6 +1,6 @@
 ---
 id: 64df346f4c86461419974c1e
-title: Step 41
+title: Paso 41
 challengeType: 20
 dashedName: step-41
 ---
@@ -60,7 +60,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
@@ -85,7 +85,7 @@ def move(n, source, auxiliary, target):
         elif remainder == 0:
             print(f'Move {i + 1} allowed between {auxiliary} and {target}')
             make_allowed_move(auxiliary, target)
-           
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df353d7ae6dc148fd64f53.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df353d7ae6dc148fd64f53.md
index fb3543a5add..f9822901f5c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df353d7ae6dc148fd64f53.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df353d7ae6dc148fd64f53.md
@@ -1,14 +1,13 @@
 ---
 id: 64df353d7ae6dc148fd64f53
-title: Step 42
+title: Paso 42
 challengeType: 20
 dashedName: step-42
 ---
 
 # --description--
 
-That's all for the iterative solution. From now on you are going to build a function that makes use of a recursive approach. Recursion is when a function calls itself.
-In this case, you are going to use recursion to calculate smaller versions of the same problem.
+That's all for the iterative solution. From now on you are going to build a function that makes use of a recursive approach. Recursion is when a function calls itself. In this case, you are going to use recursion to calculate smaller versions of the same problem.
 
 Delete the whole body of the `move` function except for the comment and the first `print` call. Leave the function declaration as is.
 
@@ -46,7 +45,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3e2fac34d813d048f3f9.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3e2fac34d813d048f3f9.md
index 762040f844e..4d6f2306d4a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3e2fac34d813d048f3f9.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3e2fac34d813d048f3f9.md
@@ -1,6 +1,6 @@
 ---
 id: 64df3e2fac34d813d048f3f9
-title: Step 43
+title: Paso 43
 challengeType: 20
 dashedName: step-43
 ---
@@ -49,14 +49,14 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
 def move(n, source, auxiliary, target):
     # display starting configuration
     print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3f1011888113fbd3d81b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3f1011888113fbd3d81b.md
index 6e833dd4abe..049d1d19ecc 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3f1011888113fbd3d81b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3f1011888113fbd3d81b.md
@@ -1,6 +1,6 @@
 ---
 id: 64df3f1011888113fbd3d81b
-title: Step 44
+title: Paso 44
 challengeType: 20
 dashedName: step-44
 ---
@@ -56,7 +56,7 @@ rods = {
 def move(n, source, auxiliary, target):
     # display starting configuration
     print(rods, '\n')
-    
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
index 924e10a5612..bd01f100fab 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
@@ -1,6 +1,6 @@
 ---
 id: 64df45a3ad4f8719e5355244
-title: Step 46
+title: Paso 46
 challengeType: 20
 dashedName: step-46
 ---
@@ -16,7 +16,7 @@ For now, each recursive call prints the `rods` dictionary without performing any
 You should remove the last element from the `rods[source]` list and append it to the `rods[target]` list before the `print` call.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)/) })
 ```
 
 # --seed--
@@ -36,10 +36,10 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, auxiliary, target)
-        
+
         # display starting configuration
         print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df47b32b92301a815d5ef8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df47b32b92301a815d5ef8.md
index 53972ba813a..5dae4b405c2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df47b32b92301a815d5ef8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df47b32b92301a815d5ef8.md
@@ -1,6 +1,6 @@
 ---
 id: 64df47b32b92301a815d5ef8
-title: Step 49
+title: Paso 49
 challengeType: 20
 dashedName: step-49
 ---
@@ -38,13 +38,13 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, auxiliary, target)
-        
+
         # move the nth disk from source to target
         rods[target].append(rods[source].pop())
-        
+
         # display our progress
         print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df496c6a8ddf1b38db1ed6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df496c6a8ddf1b38db1ed6.md
index d54fd71cfdc..f3308e5296a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df496c6a8ddf1b38db1ed6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df496c6a8ddf1b38db1ed6.md
@@ -1,6 +1,6 @@
 ---
 id: 64df496c6a8ddf1b38db1ed6
-title: Step 50
+title: Paso 50
 challengeType: 20
 dashedName: step-50
 ---
@@ -38,13 +38,13 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, target, auxiliary)
-        
+
         # move the nth disk from source to target
         rods[target].append(rods[source].pop())
-        
+
         # display our progress
         print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df72c6e0183a191fcd72dc.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df72c6e0183a191fcd72dc.md
index 92007c91c32..b62120fc315 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df72c6e0183a191fcd72dc.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df72c6e0183a191fcd72dc.md
@@ -1,6 +1,6 @@
 ---
 id: 64df72c6e0183a191fcd72dc
-title: Step 14
+title: Paso 14
 challengeType: 20
 dashedName: step-14
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e337e3096b7c1739d934e6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e337e3096b7c1739d934e6.md
index 74363e55043..9f370dcbaf9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e337e3096b7c1739d934e6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e337e3096b7c1739d934e6.md
@@ -1,6 +1,6 @@
 ---
 id: 64e337e3096b7c1739d934e6
-title: Step 45
+title: Paso 45
 challengeType: 20
 dashedName: step-45
 ---
@@ -32,12 +32,12 @@ rods = {
 --fcc-editable-region--
 def move(n, source, auxiliary, target):
     if n > 0:
-        
+
         move(n - 1, source, auxiliary, target)
-        
+
         # display starting configuration
         print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
index 74f1e30bcef..9495aac56b5 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
@@ -1,6 +1,6 @@
 ---
 id: 64e3392996b41d17a1375643
-title: Step 47
+title: Paso 47
 challengeType: 20
 dashedName: step-47
 ---
@@ -14,7 +14,7 @@ Before appending the last element to the target, add a comment saying `move the
 You should add a comment with the provided text before `rods[target].append(rods[source].pop())`.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\))/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\))/) })
 ```
 
 # --seed--
@@ -34,12 +34,12 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, auxiliary, target)
-        
+
         rods[target].append(rods[source].pop())
-        
+
         # display starting configuration
         print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e33a488b4a2717fa22ebf3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e33a488b4a2717fa22ebf3.md
index bc347cf682c..ebc4b3953ce 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e33a488b4a2717fa22ebf3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e33a488b4a2717fa22ebf3.md
@@ -1,6 +1,6 @@
 ---
 id: 64e33a488b4a2717fa22ebf3
-title: Step 15
+title: Paso 15
 challengeType: 20
 dashedName: step-15
 ---
@@ -32,7 +32,7 @@ rods = {
 
 --fcc-editable-region--
 def move(n, source, auxiliary, target):
-    
+
     print(rods)
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340302bd28513f3e73740.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340302bd28513f3e73740.md
index 34eadc2c61c..358e8f5edfe 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340302bd28513f3e73740.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340302bd28513f3e73740.md
@@ -1,6 +1,6 @@
 ---
 id: 64e340302bd28513f3e73740
-title: Step 48
+title: Paso 48
 challengeType: 20
 dashedName: step-48
 ---
@@ -34,13 +34,13 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, auxiliary, target)
-        
+
         # move the nth disk from source to target
         rods[target].append(rods[source].pop())
-        
+
         # display starting configuration
         print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340ecee18af1430939018.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340ecee18af1430939018.md
index 8669e788286..cad36da4d18 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340ecee18af1430939018.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340ecee18af1430939018.md
@@ -1,6 +1,6 @@
 ---
 id: 64e340ecee18af1430939018
-title: Step 51
+title: Paso 51
 challengeType: 20
 dashedName: step-51
 ---
@@ -34,15 +34,15 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, target, auxiliary)
-        
+
         # move the nth disk from source to target
         rods[target].append(rods[source].pop())
-        
+
         # display our progress
         print(rods, '\n')
-        
+
         move(n - 1,  auxiliary, source, target)
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
index 4fa21a1f411..431e8a8e4dc 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
@@ -1,13 +1,13 @@
 ---
 id: 64e34146860065146733883b
-title: Step 53
+title: Paso 53
 challengeType: 20
 dashedName: step-53
 ---
 
 # --description--
 
-Although recursion could sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks. 
+Although recursion can sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
 
 Set `NUMBER_OF_DISKS` to `5` and check the output.
 
@@ -34,16 +34,16 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, target, auxiliary)
-        
+
         # move the nth disk from source to target
         target.append(source.pop())
-        
+
         # display our progress
         print(A, B, C, '\n')
-        
+
         # move the n - 1 disks that we left on auxiliary onto target
         move(n - 1,  auxiliary, source, target)
-              
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, A, B, C)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/650c6082e5586f9e3acfcd3b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/650c6082e5586f9e3acfcd3b.md
index 89ae92d87e6..3f2fc0270e3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/650c6082e5586f9e3acfcd3b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/650c6082e5586f9e3acfcd3b.md
@@ -1,13 +1,13 @@
 ---
 id: 650c6082e5586f9e3acfcd3b
-title: Step 52
+title: Paso 52
 challengeType: 20
 dashedName: step-52
 ---
 
 # --description--
 
-Now, delete the `rods` dictionary and turn its keys into the variables `A`, `B`, and `C`, respectively, keeping their values. Refactor your code to reflect these changes. If you see the output on the terminal, you correctly did this step. 
+Now, delete the `rods` dictionary and turn its keys into the variables `A`, `B`, and `C`, respectively, keeping their values. Refactor your code to reflect these changes. If you see the output on the terminal, you correctly did this step.
 
 # --hints--
 
@@ -58,16 +58,16 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, target, auxiliary)
-        
+
         # move the nth disk from source to target
         rods[target].append(rods[source].pop())
-        
+
         # display our progress
         print(rods, '\n')
-        
+
         # move the n - 1 disks that we left on auxiliary onto target
         move(n - 1,  auxiliary, source, target)
-              
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/65782342850feb3b8d62f936.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/65782342850feb3b8d62f936.md
index 4b5e4b00fbd..ecb6753d23d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/65782342850feb3b8d62f936.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/65782342850feb3b8d62f936.md
@@ -1,6 +1,6 @@
 ---
 id: 65782342850feb3b8d62f936
-title: Step 18
+title: Paso 18
 challengeType: 20
 dashedName: step-18
 ---
@@ -43,7 +43,7 @@ def move(n, source, auxiliary, target):
     # display starting configuration
     print(rods)
     for i in range(number_of_moves):
-        
+
         if (i + 1) % 3 == 1:
             print(f'Move {i + 1} allowed between {source} and {target}')
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/6578273de26b6e5965a9107d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/6578273de26b6e5965a9107d.md
index 7fa25d00ad3..bd9122f2001 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/6578273de26b6e5965a9107d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/6578273de26b6e5965a9107d.md
@@ -1,6 +1,6 @@
 ---
 id: 6578273de26b6e5965a9107d
-title: Step 19
+title: Paso 19
 challengeType: 20
 dashedName: step-19
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b667a772ed53e82962c81.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b667a772ed53e82962c81.md
index 5f63989d25d..7124f99534c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b667a772ed53e82962c81.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b667a772ed53e82962c81.md
@@ -1,6 +1,6 @@
 ---
 id: 657b667a772ed53e82962c81
-title: Step 54
+title: Paso 54
 challengeType: 20
 dashedName: step-54
 ---
@@ -53,16 +53,16 @@ def move(n, source, auxiliary, target):
 --fcc-editable-region--        
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, target, auxiliary)
-        
+
         # move the nth disk from source to target
         target.append(source.pop())
-        
+
         # display our progress
         print(A, B, C, '\n')
-        
+
         # move the n - 1 disks that we left on auxiliary onto target
         move(n - 1,  auxiliary, source, target)
-              
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, A, B, C)
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b6a4a49faec5c600287ba.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b6a4a49faec5c600287ba.md
index fa84c79b7ad..ce0e99eeddb 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b6a4a49faec5c600287ba.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b6a4a49faec5c600287ba.md
@@ -1,6 +1,6 @@
 ---
 id: 657b6a4a49faec5c600287ba
-title: Step 55
+title: Paso 55
 challengeType: 20
 dashedName: step-55
 ---
@@ -9,7 +9,7 @@ dashedName: step-55
 
 As a final step, reduce the indentation level of all the code after the `return` statement.
 
-Well done. You have completed the Tower of Hanoi practice project.
+Bien hecho. You have completed the Tower of Hanoi practice project.
 
 # --hints--
 
@@ -41,16 +41,16 @@ def move(n, source, auxiliary, target):
         return
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, target, auxiliary)
-        
+
         # move the nth disk from source to target
         target.append(source.pop())
-        
+
         # display our progress
         print(A, B, C, '\n')
-        
+
         # move the n - 1 disks that we left on auxiliary onto target
         move(n - 1,  auxiliary, source, target)
-              
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, A, B, C)
 --fcc-editable-region--
@@ -69,16 +69,16 @@ def move(n, source, auxiliary, target):
         return
     # move n - 1 disks from source to auxiliary, so they are out of the way
     move(n - 1, source, target, auxiliary)
-        
+
     # move the nth disk from source to target
     target.append(source.pop())
-        
+
     # display our progress
     print(A, B, C, '\n')
-        
+
     # move the n - 1 disks that we left on auxiliary onto target
     move(n - 1,  auxiliary, source, target)
-              
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, A, B, C)
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564642ce403fe29cc23fee7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564642ce403fe29cc23fee7.md
index 6e659d54341..a6e43e601cf 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564642ce403fe29cc23fee7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564642ce403fe29cc23fee7.md
@@ -1,6 +1,6 @@
 ---
 id: 6564642ce403fe29cc23fee7
-title: Step 1
+title: Paso 1
 challengeType: 20
 dashedName: step-1
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564683821b2ee3174e7250e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564683821b2ee3174e7250e.md
index 1e4c026690c..75585020bdb 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564683821b2ee3174e7250e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564683821b2ee3174e7250e.md
@@ -1,6 +1,6 @@
 ---
 id: 6564683821b2ee3174e7250e
-title: Step 2
+title: Paso 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -17,7 +17,7 @@ print(string.ascii_lowercase)
 # Output: abcdefghijklmnopqrstuvwxyz
 ```
 
-In this project, you are going to use different constants from the `string` module. 
+In this project, you are going to use different constants from the `string` module.
 
 Declare a new variable called `letters` and assign `string.ascii_letters` to this variable.
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656469e62377ab34a5bcb8d1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656469e62377ab34a5bcb8d1.md
index 7ac084afe92..425cbfc13af 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656469e62377ab34a5bcb8d1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656469e62377ab34a5bcb8d1.md
@@ -1,6 +1,6 @@
 ---
 id: 656469e62377ab34a5bcb8d1
-title: Step 3
+title: Paso 3
 challengeType: 20
 dashedName: step-3
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65646ab6bced52360f44670f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65646ab6bced52360f44670f.md
index cc5caadf882..65758f1e214 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65646ab6bced52360f44670f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65646ab6bced52360f44670f.md
@@ -1,6 +1,6 @@
 ---
 id: 65646ab6bced52360f44670f
-title: Step 5
+title: Paso 5
 challengeType: 20
 dashedName: step-5
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65646ffeaed2d238c562a014.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65646ffeaed2d238c562a014.md
index fafcf5b14df..678432002f3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65646ffeaed2d238c562a014.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65646ffeaed2d238c562a014.md
@@ -1,6 +1,6 @@
 ---
 id: 65646ffeaed2d238c562a014
-title: Step 8
+title: Paso 8
 challengeType: 20
 dashedName: step-8
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656470d517833a39bb8b5608.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656470d517833a39bb8b5608.md
index 6a7b665fa07..f8168cb7028 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656470d517833a39bb8b5608.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656470d517833a39bb8b5608.md
@@ -1,6 +1,6 @@
 ---
 id: 656470d517833a39bb8b5608
-title: Step 9
+title: Paso 9
 challengeType: 20
 dashedName: step-9
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656474314bf37d3c83a85143.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656474314bf37d3c83a85143.md
index ef3bfb73797..c0a557f632a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656474314bf37d3c83a85143.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656474314bf37d3c83a85143.md
@@ -1,6 +1,6 @@
 ---
 id: 656474314bf37d3c83a85143
-title: Step 10
+title: Paso 10
 challengeType: 20
 dashedName: step-10
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656475bbf1c2573de1d2c69c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656475bbf1c2573de1d2c69c.md
index bdf9f83fd86..a613ab12e59 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656475bbf1c2573de1d2c69c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656475bbf1c2573de1d2c69c.md
@@ -1,6 +1,6 @@
 ---
 id: 656475bbf1c2573de1d2c69c
-title: Step 11
+title: Paso 11
 challengeType: 20
 dashedName: step-11
 ---
@@ -9,7 +9,7 @@ dashedName: step-11
 
 Every time the code runs, you should see a random character from the `all_characters` string. This is exactly what you want to achieve to create a random password.
 
-However, the algorithm on which `random` relies makes the generated pseudo-random numbers predictable. Therefore, although the `random` module is suitable for the most common applications, it cannot be used for cryptographic purposes, due to its deterministic nature. 
+However, the algorithm on which `random` relies makes the generated pseudo-random numbers predictable. Therefore, although the `random` module is suitable for the most common applications, it cannot be used for cryptographic purposes, due to its deterministic nature.
 
 Instead of importing `random`, import the `secrets` module. Then change the `print()` call to use `secrets.choice(all_characters)`.
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656477845006313fbfea0ad1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656477845006313fbfea0ad1.md
index 30c5f76c957..0d4fcdbdb3c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656477845006313fbfea0ad1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656477845006313fbfea0ad1.md
@@ -1,6 +1,6 @@
 ---
 id: 656477845006313fbfea0ad1
-title: Step 12
+title: Paso 12
 challengeType: 20
 dashedName: step-12
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656479aa5f298441c190bf8f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656479aa5f298441c190bf8f.md
index 98227cdc3fd..19b06755950 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656479aa5f298441c190bf8f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656479aa5f298441c190bf8f.md
@@ -1,6 +1,6 @@
 ---
 id: 656479aa5f298441c190bf8f
-title: Step 13
+title: Paso 13
 challengeType: 20
 dashedName: step-13
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65647c71a5d2bd431596f629.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65647c71a5d2bd431596f629.md
index e81fdd50c83..06c3fb36b7a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65647c71a5d2bd431596f629.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65647c71a5d2bd431596f629.md
@@ -1,6 +1,6 @@
 ---
 id: 65647c71a5d2bd431596f629
-title: Step 14
+title: Paso 14
 challengeType: 20
 dashedName: step-14
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656485a8a3496d4a36b1496a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656485a8a3496d4a36b1496a.md
index 0a0410ac4a3..154b079859e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656485a8a3496d4a36b1496a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656485a8a3496d4a36b1496a.md
@@ -1,6 +1,6 @@
 ---
 id: 656485a8a3496d4a36b1496a
-title: Step 4
+title: Paso 4
 challengeType: 20
 dashedName: step-4
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564883669b5af4b69f794cc.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564883669b5af4b69f794cc.md
index a04cc0a51bf..5576660f6c3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564883669b5af4b69f794cc.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564883669b5af4b69f794cc.md
@@ -1,13 +1,13 @@
 ---
 id: 6564883669b5af4b69f794cc
-title: Step 6
+title: Paso 6
 challengeType: 20
 dashedName: step-6
 ---
 
 # --description--
 
-Your `all_characters` variable is a string formed by all lowercase and uppercase letters, all the 10 digits and several special characters. 
+Your `all_characters` variable is a string formed by all lowercase and uppercase letters, all the 10 digits and several special characters.
 
 Just before it, add a comment saying `Combine all characters`.
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656489e0a5d0954c1a64fc93.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656489e0a5d0954c1a64fc93.md
index 6fd9516c5a1..f902927ce9c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656489e0a5d0954c1a64fc93.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656489e0a5d0954c1a64fc93.md
@@ -1,6 +1,6 @@
 ---
 id: 656489e0a5d0954c1a64fc93
-title: Step 7
+title: Paso 7
 challengeType: 20
 dashedName: step-7
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648e4c5b316c4ec5e4fddc.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648e4c5b316c4ec5e4fddc.md
index 8677b8d5536..92c9aea96f6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648e4c5b316c4ec5e4fddc.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648e4c5b316c4ec5e4fddc.md
@@ -1,6 +1,6 @@
 ---
 id: 65648e4c5b316c4ec5e4fddc
-title: Step 15
+title: Paso 15
 challengeType: 20
 dashedName: step-15
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648eefbee2014f5815f4ba.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648eefbee2014f5815f4ba.md
index 2351611d9f1..d7cbb76c137 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648eefbee2014f5815f4ba.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648eefbee2014f5815f4ba.md
@@ -1,6 +1,6 @@
 ---
 id: 65648eefbee2014f5815f4ba
-title: Step 16
+title: Paso 16
 challengeType: 20
 dashedName: step-16
 ---
@@ -43,6 +43,6 @@ def generate_password(length):
     all_characters = letters + digits + symbols
 --fcc-editable-region--    
     password = ''
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648f4b2281ba50051ae39c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648f4b2281ba50051ae39c.md
index e2e180033f5..54ac8b8248a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648f4b2281ba50051ae39c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648f4b2281ba50051ae39c.md
@@ -1,6 +1,6 @@
 ---
 id: 65648f4b2281ba50051ae39c
-title: Step 17
+title: Paso 17
 challengeType: 20
 dashedName: step-17
 ---
@@ -57,6 +57,6 @@ def generate_password(length):
 --fcc-editable-region--    
     password = ''
     # Generate password
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656490295d346850a4c4f2b5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656490295d346850a4c4f2b5.md
index a31789007a2..3bf54de9281 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656490295d346850a4c4f2b5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656490295d346850a4c4f2b5.md
@@ -1,6 +1,6 @@
 ---
 id: 656490295d346850a4c4f2b5
-title: Step 19
+title: Paso 19
 challengeType: 20
 dashedName: step-19
 ---
@@ -46,6 +46,6 @@ def generate_password(length):
     # Generate password
     for _ in range(length):
         password += secrets.choice(all_characters)
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649122c7f77f519aaf0975.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649122c7f77f519aaf0975.md
index 37997047d64..72c519e9e7d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649122c7f77f519aaf0975.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649122c7f77f519aaf0975.md
@@ -1,6 +1,6 @@
 ---
 id: 65649122c7f77f519aaf0975
-title: Step 20
+title: Paso 20
 challengeType: 20
 dashedName: step-20
 ---
@@ -50,9 +50,9 @@ def generate_password(length):
     # Generate password
     for _ in range(length):
         password += secrets.choice(all_characters)
-        
+
     return password
-    
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656491fa4e69005287eb5a9a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656491fa4e69005287eb5a9a.md
index 10643186b08..7194a3acb99 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656491fa4e69005287eb5a9a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656491fa4e69005287eb5a9a.md
@@ -1,6 +1,6 @@
 ---
 id: 656491fa4e69005287eb5a9a
-title: Step 21
+title: Paso 21
 challengeType: 20
 dashedName: step-21
 ---
@@ -39,9 +39,9 @@ def generate_password(length):
     # Generate password
     for _ in range(length):
         password += secrets.choice(all_characters)
-        
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password(8)
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656494269ccce754411a2112.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656494269ccce754411a2112.md
index 06daef69d1e..219882b304b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656494269ccce754411a2112.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656494269ccce754411a2112.md
@@ -1,6 +1,6 @@
 ---
 id: 656494269ccce754411a2112
-title: Step 27
+title: Paso 27
 challengeType: 20
 dashedName: step-27
 ---
@@ -44,7 +44,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649a631440b757f9f7b428.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649a631440b757f9f7b428.md
index 766eaf6b0ef..0306d50c2c8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649a631440b757f9f7b428.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649a631440b757f9f7b428.md
@@ -1,6 +1,6 @@
 ---
 id: 65649a631440b757f9f7b428
-title: Step 28
+title: Paso 28
 challengeType: 20
 dashedName: step-28
 ---
@@ -56,7 +56,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564a767a7241362f7d8d664.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564a767a7241362f7d8d664.md
index ae5e8ab15e1..794ef2b1262 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564a767a7241362f7d8d664.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564a767a7241362f7d8d664.md
@@ -1,14 +1,13 @@
 ---
 id: 6564a767a7241362f7d8d664
-title: Step 18
+title: Paso 18
 challengeType: 20
 dashedName: step-18
 ---
 
 # --description--
 
-A standalone single underscore is used to represent a value you don't care or that won't be used in your code.
-Your iteration variable is not actually used.
+A standalone single underscore is used to represent a value you don't care or that won't be used in your code. Your iteration variable is not actually used.
 
 Modify your `i` variable into a single underscore.
 
@@ -49,6 +48,6 @@ def generate_password(length):
     # Generate password
     for i in range(length):
         password += secrets.choice(all_characters)
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564b8c9349bd76dc037967b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564b8c9349bd76dc037967b.md
index df213fe08f1..c7ae0ad1d7e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564b8c9349bd76dc037967b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564b8c9349bd76dc037967b.md
@@ -1,6 +1,6 @@
 ---
 id: 6564b8c9349bd76dc037967b
-title: Step 29
+title: Paso 29
 challengeType: 20
 dashedName: step-29
 ---
@@ -55,7 +55,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564c67db26c417561ab510d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564c67db26c417561ab510d.md
index ea14a6de78f..1123eb4e6aa 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564c67db26c417561ab510d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564c67db26c417561ab510d.md
@@ -1,6 +1,6 @@
 ---
 id: 6564c67db26c417561ab510d
-title: Step 31
+title: Paso 31
 challengeType: 20
 dashedName: step-31
 ---
@@ -50,13 +50,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cbb6311a40783b3f5de6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cbb6311a40783b3f5de6.md
index 525deb93a9a..27192e106db 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cbb6311a40783b3f5de6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cbb6311a40783b3f5de6.md
@@ -1,6 +1,6 @@
 ---
 id: 6564cbb6311a40783b3f5de6
-title: Step 36
+title: Paso 36
 challengeType: 20
 dashedName: step-36
 ---
@@ -43,13 +43,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '[0123456789]')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cf2e8642517abdf9d6e2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cf2e8642517abdf9d6e2.md
index 241ee2936b0..eb7d16c72ca 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cf2e8642517abdf9d6e2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cf2e8642517abdf9d6e2.md
@@ -1,6 +1,6 @@
 ---
 id: 6564cf2e8642517abdf9d6e2
-title: Step 37
+title: Paso 37
 challengeType: 20
 dashedName: step-37
 ---
@@ -47,7 +47,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d096a55d707bd77ab67b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d096a55d707bd77ab67b.md
index 7c060bca5cf..e78cbc73cd9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d096a55d707bd77ab67b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d096a55d707bd77ab67b.md
@@ -1,6 +1,6 @@
 ---
 id: 6564d096a55d707bd77ab67b
-title: Step 38
+title: Paso 38
 challengeType: 20
 dashedName: step-38
 ---
@@ -43,13 +43,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '[0-9]')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d27c8e4c197d367c3b1c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d27c8e4c197d367c3b1c.md
index 1d7f583c3e4..1bcd7242fe8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d27c8e4c197d367c3b1c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d27c8e4c197d367c3b1c.md
@@ -1,6 +1,6 @@
 ---
 id: 6564d27c8e4c197d367c3b1c
-title: Step 39
+title: Paso 39
 challengeType: 20
 dashedName: step-39
 ---
@@ -47,7 +47,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d2eeb36ebe7dd9bd1ee9.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d2eeb36ebe7dd9bd1ee9.md
index 9bbbad8cfdf..61ca22f69ee 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d2eeb36ebe7dd9bd1ee9.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d2eeb36ebe7dd9bd1ee9.md
@@ -1,6 +1,6 @@
 ---
 id: 6564d2eeb36ebe7dd9bd1ee9
-title: Step 40
+title: Paso 40
 challengeType: 20
 dashedName: step-40
 ---
@@ -48,7 +48,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d500f1a48e7f2b732a37.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d500f1a48e7f2b732a37.md
index 4367db96fc0..811040b7b81 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d500f1a48e7f2b732a37.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d500f1a48e7f2b732a37.md
@@ -1,6 +1,6 @@
 ---
 id: 6564d500f1a48e7f2b732a37
-title: Step 41
+title: Paso 41
 challengeType: 20
 dashedName: step-41
 ---
@@ -49,7 +49,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d68c34027a8072a704f4.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d68c34027a8072a704f4.md
index 85af9f0e5c7..0e3555b85e2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d68c34027a8072a704f4.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d68c34027a8072a704f4.md
@@ -1,6 +1,6 @@
 ---
 id: 6564d68c34027a8072a704f4
-title: Step 42
+title: Paso 42
 challengeType: 20
 dashedName: step-42
 ---
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '[0-9]'),
             (lowercase, '[a-z]'),
@@ -50,7 +50,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d75a923d21815caaa445.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d75a923d21815caaa445.md
index 4ae0fdbe47f..145141a08e8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d75a923d21815caaa445.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d75a923d21815caaa445.md
@@ -1,6 +1,6 @@
 ---
 id: 6564d75a923d21815caaa445
-title: Step 43
+title: Paso 43
 challengeType: 20
 dashedName: step-43
 ---
@@ -43,7 +43,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '[0-9]'),
             (lowercase, '[a-z]'),
@@ -52,7 +52,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d97a5ef99783216a6229.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d97a5ef99783216a6229.md
index 132d22a267f..f4e3e7784c4 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d97a5ef99783216a6229.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d97a5ef99783216a6229.md
@@ -1,6 +1,6 @@
 ---
 id: 6564d97a5ef99783216a6229
-title: Step 44
+title: Paso 44
 challengeType: 20
 dashedName: step-44
 ---
@@ -43,7 +43,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '[0-9]'),
             (lowercase, '[a-z]'),
@@ -52,7 +52,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564daa2725b9b8420141b1c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564daa2725b9b8420141b1c.md
index 39f6c2d6d8e..ff1ff7d819c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564daa2725b9b8420141b1c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564daa2725b9b8420141b1c.md
@@ -1,6 +1,6 @@
 ---
 id: 6564daa2725b9b8420141b1c
-title: Step 45
+title: Paso 45
 challengeType: 20
 dashedName: step-45
 ---
@@ -50,7 +50,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564db880cf9408535f17ff4.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564db880cf9408535f17ff4.md
index af15d2918e5..49c318a9a53 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564db880cf9408535f17ff4.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564db880cf9408535f17ff4.md
@@ -1,6 +1,6 @@
 ---
 id: 6564db880cf9408535f17ff4
-title: Step 46
+title: Paso 46
 challengeType: 20
 dashedName: step-46
 ---
@@ -50,7 +50,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564dd65c3c2fa873a83d213.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564dd65c3c2fa873a83d213.md
index d798220a04a..0b383663e21 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564dd65c3c2fa873a83d213.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564dd65c3c2fa873a83d213.md
@@ -1,6 +1,6 @@
 ---
 id: 6564dd65c3c2fa873a83d213
-title: Step 47
+title: Paso 47
 challengeType: 20
 dashedName: step-47
 ---
@@ -52,7 +52,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564de10a0887f882b0012d3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564de10a0887f882b0012d3.md
index 1a1fcb72764..ae09f3e9610 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564de10a0887f882b0012d3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564de10a0887f882b0012d3.md
@@ -1,6 +1,6 @@
 ---
 id: 6564de10a0887f882b0012d3
-title: Step 48
+title: Paso 48
 challengeType: 20
 dashedName: step-48
 ---
@@ -52,7 +52,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564eebf0d2d6390b9377197.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564eebf0d2d6390b9377197.md
index af02fd4a4d4..5fa5d758da7 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564eebf0d2d6390b9377197.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564eebf0d2d6390b9377197.md
@@ -1,6 +1,6 @@
 ---
 id: 6564eebf0d2d6390b9377197
-title: Step 49
+title: Paso 49
 challengeType: 20
 dashedName: step-49
 ---
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -50,7 +50,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564efa70114b591b74d5679.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564efa70114b591b74d5679.md
index 93ba3536c1b..d0dec97541b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564efa70114b591b74d5679.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564efa70114b591b74d5679.md
@@ -1,6 +1,6 @@
 ---
 id: 6564efa70114b591b74d5679
-title: Step 50
+title: Paso 50
 challengeType: 20
 dashedName: step-50
 ---
@@ -43,7 +43,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -52,7 +52,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
index 4140891792d..653be73b8c9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
@@ -1,6 +1,6 @@
 ---
 id: 6564f0279e23ce924eedd1b2
-title: Step 51
+title: Paso 51
 challengeType: 20
 dashedName: step-51
 ---
@@ -21,7 +21,7 @@ You should delete the last three lines in your code.
 ({ test: () => {
   assert.isFalse(/pattern\s*=\s*r("|')\\W\1/.test(code));
   assert.isFalse(/quote\s*=\s*("|')_\1/.test(code));
-  assert.isFalse(/print\(re\.findall\(pattern, quote\)\)/.test(code));
+  assert.isFalse(/print\(\s*re\.findall\(\s*pattern, quote\s*\)\s*\)/.test(code));
 }})
 ```
 
@@ -49,7 +49,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -58,7 +58,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f32b18480893cf7799fd.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f32b18480893cf7799fd.md
index cbce569f3af..ece896e6620 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f32b18480893cf7799fd.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f32b18480893cf7799fd.md
@@ -1,6 +1,6 @@
 ---
 id: 6564f32b18480893cf7799fd
-title: Step 52
+title: Paso 52
 challengeType: 20
 dashedName: step-52
 ---
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f583ca6fbf9556098dd6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f583ca6fbf9556098dd6.md
index 80f33eace1d..41b0d1f34f4 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f583ca6fbf9556098dd6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f583ca6fbf9556098dd6.md
@@ -1,6 +1,6 @@
 ---
 id: 6564f583ca6fbf9556098dd6
-title: Step 53
+title: Paso 53
 challengeType: 20
 dashedName: step-53
 ---
@@ -48,7 +48,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
             (uppercase, r'[A-Z]'),            
             (special_chars, fr'[{symbols}]')            
         ]
-        
+
 --fcc-editable-region--
     return password
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f834dd717998092cfd47.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f834dd717998092cfd47.md
index 9651ba05628..6152029b8e9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f834dd717998092cfd47.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f834dd717998092cfd47.md
@@ -1,6 +1,6 @@
 ---
 id: 6564f834dd717998092cfd47
-title: Step 54
+title: Paso 54
 challengeType: 20
 dashedName: step-54
 ---
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -50,7 +50,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]
 --fcc-editable-region--         
         # Check constraints
-        
+
 --fcc-editable-region--
     return password
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564fd78ffff909b1531d3c3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564fd78ffff909b1531d3c3.md
index 29e6ef008b3..291f02dba39 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564fd78ffff909b1531d3c3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564fd78ffff909b1531d3c3.md
@@ -1,6 +1,6 @@
 ---
 id: 6564fd78ffff909b1531d3c3
-title: Step 55
+title: Paso 55
 challengeType: 20
 dashedName: step-55
 ---
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565012a2564509d40a90048.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565012a2564509d40a90048.md
index f7c0e64b857..84677309ffe 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565012a2564509d40a90048.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565012a2564509d40a90048.md
@@ -1,6 +1,6 @@
 ---
 id: 6565012a2564509d40a90048
-title: Step 56
+title: Paso 56
 challengeType: 20
 dashedName: step-56
 ---
@@ -43,7 +43,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bb128adfcd5ec362382d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bb128adfcd5ec362382d.md
index 35bffcc8291..861a2bb3103 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bb128adfcd5ec362382d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bb128adfcd5ec362382d.md
@@ -1,6 +1,6 @@
 ---
 id: 6565bb128adfcd5ec362382d
-title: Step 57
+title: Paso 57
 challengeType: 20
 dashedName: step-57
 ---
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bd4265158360de8e2ae7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bd4265158360de8e2ae7.md
index 9799f90428b..bb94a97b29e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bd4265158360de8e2ae7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bd4265158360de8e2ae7.md
@@ -1,6 +1,6 @@
 ---
 id: 6565bd4265158360de8e2ae7
-title: Step 59
+title: Paso 59
 challengeType: 20
 dashedName: step-59
 ---
@@ -47,7 +47,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c014db6e9b63c257771d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c014db6e9b63c257771d.md
index f8763d36d4c..07af9d01395 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c014db6e9b63c257771d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c014db6e9b63c257771d.md
@@ -1,6 +1,6 @@
 ---
 id: 6565c014db6e9b63c257771d
-title: Step 58
+title: Paso 58
 challengeType: 20
 dashedName: step-58
 ---
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -50,7 +50,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]
 --fcc-editable-region--         
         # Check constraints
-        
+
         for constraint, pattern in constraints:
             constraint <= len(re.findall(pattern, password))
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c084627071646f94c4b0.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c084627071646f94c4b0.md
index cc05d24a567..1c9cb570aa0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c084627071646f94c4b0.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c084627071646f94c4b0.md
@@ -1,6 +1,6 @@
 ---
 id: 6565c084627071646f94c4b0
-title: Step 60
+title: Paso 60
 challengeType: 20
 dashedName: step-60
 ---
@@ -47,7 +47,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c13fdb798865c161d8f8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c13fdb798865c161d8f8.md
index 1ff7833aaf6..65292e184dd 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c13fdb798865c161d8f8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c13fdb798865c161d8f8.md
@@ -1,13 +1,13 @@
 ---
 id: 6565c13fdb798865c161d8f8
-title: Step 65
+title: Paso 65
 challengeType: 20
 dashedName: step-65
 ---
 
 # --description--
 
-Now it's time to test your function. Uncomment the last two lines in your code and modify the function call passing 5 arguments. Use `8` for the length and `1` for the other four constraints. 
+Now it's time to test your function. Uncomment the last two lines in your code and modify the function call passing 5 arguments. Use `8` for the length and `1` for the other four constraints.
 
 # --hints--
 
@@ -47,14 +47,14 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
             (uppercase, r'[A-Z]'),            
             (special_chars, fr'[{symbols}]')            
         ]
-        
+
         # Check constraints        
         if all(
             constraint <= len(re.findall(pattern, password))
@@ -63,7 +63,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
             break
 
     return password
-    
+
 --fcc-editable-region--
 # new_password = generate_password(8)
 # print(new_password)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c234de8cdf673c96bdf3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c234de8cdf673c96bdf3.md
index 37a0652b40b..474d60c2a88 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c234de8cdf673c96bdf3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c234de8cdf673c96bdf3.md
@@ -1,6 +1,6 @@
 ---
 id: 6565c234de8cdf673c96bdf3
-title: Step 67
+title: Paso 67
 challengeType: 20
 dashedName: step-67
 ---
@@ -43,7 +43,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -57,9 +57,9 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password(length=8, nums=1, special_chars=1, uppercase=1, lowercase=1)
 print(new_password)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c32f89ab8d68b42aff30.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c32f89ab8d68b42aff30.md
index b5336c8fb85..d26ce8f3bac 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c32f89ab8d68b42aff30.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c32f89ab8d68b42aff30.md
@@ -1,6 +1,6 @@
 ---
 id: 6565c32f89ab8d68b42aff30
-title: Step 70
+title: Paso 70
 challengeType: 20
 dashedName: step-70
 ---
@@ -42,7 +42,7 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -56,9 +56,9 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password(length=8)
 print(new_password)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c3a146bd5469b62bc59e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c3a146bd5469b62bc59e.md
index d5ffe314062..9318bdb31e3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c3a146bd5469b62bc59e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c3a146bd5469b62bc59e.md
@@ -1,6 +1,6 @@
 ---
 id: 6565c3a146bd5469b62bc59e
-title: Step 71
+title: Paso 71
 challengeType: 20
 dashedName: step-71
 ---
@@ -42,7 +42,7 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -56,9 +56,9 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password()
 print(new_password)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c4767f49286aec825c6d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c4767f49286aec825c6d.md
index a3a56df3890..f41ffe57fd7 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c4767f49286aec825c6d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c4767f49286aec825c6d.md
@@ -1,13 +1,13 @@
 ---
 id: 6565c4767f49286aec825c6d
-title: Step 72
+title: Paso 72
 challengeType: 20
 dashedName: step-72
 ---
 
 # --description--
 
-Finally, put the last two lines of your code inside an `if` statement that execute when `__name__ == '__main__'`. In this way, your code won't run when imported as a module. Otherwise, it will call `generate_password()` and print the generated password. 
+Finally, put the last two lines of your code inside an `if` statement that execute when `__name__ == '__main__'`. In this way, your code won't run when imported as a module. Otherwise, it will call `generate_password()` and print the generated password.
 
 With that, the password generator project is complete.
 
@@ -44,7 +44,7 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -58,9 +58,9 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password()
 print('Generated password:', new_password)
@@ -90,7 +90,7 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -104,13 +104,13 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
             for constraint, pattern in constraints
         ):            
             break
-    
+
     return password
-    
+
 
 if __name__ == '__main__':
     new_password = generate_password()
     print('Generated password:', new_password)
-    
+
 ```
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656eec2f40d18056cc58b229.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656eec2f40d18056cc58b229.md
index 19ef5b075ed..7f870ccdbcb 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656eec2f40d18056cc58b229.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656eec2f40d18056cc58b229.md
@@ -1,6 +1,6 @@
 ---
 id: 656eec2f40d18056cc58b229
-title: Step 30
+title: Paso 30
 challengeType: 20
 dashedName: step-30
 ---
@@ -48,13 +48,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)    
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef54070c72161e6feb90f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef54070c72161e6feb90f.md
index df879472d40..9e668f2ba84 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef54070c72161e6feb90f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef54070c72161e6feb90f.md
@@ -1,6 +1,6 @@
 ---
 id: 656ef54070c72161e6feb90f
-title: Step 22
+title: Paso 22
 challengeType: 20
 dashedName: step-22
 ---
@@ -45,9 +45,9 @@ def generate_password(length):
     # Generate password
     for _ in range(length):
         password += secrets.choice(all_characters)
-        
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password(8)
 print(new_password)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef5bc5c0cd464be1df675.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef5bc5c0cd464be1df675.md
index 5467293cf15..d57ccfb5317 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef5bc5c0cd464be1df675.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef5bc5c0cd464be1df675.md
@@ -1,6 +1,6 @@
 ---
 id: 656ef5bc5c0cd464be1df675
-title: Step 23
+title: Paso 23
 challengeType: 20
 dashedName: step-23
 ---
@@ -48,7 +48,7 @@ def generate_password(length):
     # Generate password
     for _ in range(length):
         password += secrets.choice(all_characters)
-        
+
     return password
 
 # new_password = generate_password(8)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef783bba6976de014eaa8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef783bba6976de014eaa8.md
index 25a43f9abc3..675919a6c5a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef783bba6976de014eaa8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef783bba6976de014eaa8.md
@@ -1,6 +1,6 @@
 ---
 id: 656ef783bba6976de014eaa8
-title: Step 24
+title: Paso 24
 challengeType: 20
 dashedName: step-24
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef7f792734072dedd8319.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef7f792734072dedd8319.md
index c86eb3203a1..46b67391311 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef7f792734072dedd8319.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef7f792734072dedd8319.md
@@ -1,6 +1,6 @@
 ---
 id: 656ef7f792734072dedd8319
-title: Step 25
+title: Paso 25
 challengeType: 20
 dashedName: step-25
 ---
@@ -47,7 +47,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
 --fcc-editable-region--
     return password
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef89b4b486b7a16077864.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef89b4b486b7a16077864.md
index 28b451cbff4..ffef0a4adc9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef89b4b486b7a16077864.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef89b4b486b7a16077864.md
@@ -1,6 +1,6 @@
 ---
 id: 656ef89b4b486b7a16077864
-title: Step 26
+title: Paso 26
 challengeType: 20
 dashedName: step-26
 ---
@@ -56,7 +56,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
             password += secrets.choice(all_characters)
 --fcc-editable-region--        
         constraints = []
-        
+
 --fcc-editable-region--
     return password
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f04b20397d9a574cc7eb2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f04b20397d9a574cc7eb2.md
index da5f46bf97d..088cd5e1c77 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f04b20397d9a574cc7eb2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f04b20397d9a574cc7eb2.md
@@ -1,6 +1,6 @@
 ---
 id: 656f04b20397d9a574cc7eb2
-title: Step 32
+title: Paso 32
 challengeType: 20
 dashedName: step-32
 ---
@@ -47,13 +47,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0bc259c1f6b57486ed68.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0bc259c1f6b57486ed68.md
index cd324988a3d..74f296efd5e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0bc259c1f6b57486ed68.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0bc259c1f6b57486ed68.md
@@ -1,6 +1,6 @@
 ---
 id: 656f0bc259c1f6b57486ed68
-title: Step 33
+title: Paso 33
 challengeType: 20
 dashedName: step-33
 ---
@@ -43,13 +43,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0d6bc60b58b9777a36c9.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0d6bc60b58b9777a36c9.md
index 6da7ea8c974..eac8c2d305a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0d6bc60b58b9777a36c9.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0d6bc60b58b9777a36c9.md
@@ -1,6 +1,6 @@
 ---
 id: 656f0d6bc60b58b9777a36c9
-title: Step 34
+title: Paso 34
 challengeType: 20
 dashedName: step-34
 ---
@@ -47,13 +47,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
index 0e18f1b1c72..18ff01d6ac6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
@@ -1,6 +1,6 @@
 ---
 id: 656f10458134d4c4e283a2f1
-title: Step 35
+title: Paso 35
 challengeType: 20
 dashedName: step-35
 ---
@@ -14,7 +14,7 @@ Now, turn the empty string in the constraint tuple into a regex pattern to match
 You should have the `(nums, '[0123456789]')` tuple in your `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
+({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
 ```
 
 # --seed--
@@ -47,7 +47,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
index 4b64573d26b..40153d253b1 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
@@ -1,6 +1,6 @@
 ---
 id: 6577319039f4f7de9251b822
-title: Step 61
+title: Paso 61
 challengeType: 20
 dashedName: step-61
 ---
@@ -15,7 +15,7 @@ The list stores the results of evaluating the expression `constraint <= len(re.f
 
 # --hints--
 
-You should replace your existing `for` loop and two `if` statements with a single `if` statement. 
+You should replace your existing `for` loop and two `if` statements with a single `if` statement.
 
 ```js
 ({ test: () => {
@@ -27,7 +27,7 @@ You should replace your existing `for` loop and two `if` statements with a singl
 Your new `if` condition should be a list comprehension that is the result of evaluating the expression `constraint <= len(re.findall(pattern, password))` for each `constraint`-`pattern` tuple in the `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /^(\s{8})if\s+\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
+({ test: () => assert.match(code, /^(\s{8})if\s*\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
 ```
 
 # --seed--
@@ -54,7 +54,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -68,7 +68,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         for constraint, pattern in constraints:
             if constraint <= len(re.findall(pattern, password)):
                 count += 1
-            
+
         if count == 4:
 --fcc-editable-region--
             break
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657732654845d8e2fb1217e6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657732654845d8e2fb1217e6.md
index d94550adf54..f552c7d9684 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657732654845d8e2fb1217e6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657732654845d8e2fb1217e6.md
@@ -1,6 +1,6 @@
 ---
 id: 657732654845d8e2fb1217e6
-title: Step 62
+title: Paso 62
 challengeType: 20
 dashedName: step-62
 ---
@@ -45,7 +45,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -60,7 +60,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         for constraint, pattern in constraints]:
 --fcc-editable-region--        
             break
-    
+
     return password
 
 # new_password = generate_password(8)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577333feab1e8e927014f03.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577333feab1e8e927014f03.md
index 4af481db69e..5f5c431b3db 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577333feab1e8e927014f03.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577333feab1e8e927014f03.md
@@ -1,6 +1,6 @@
 ---
 id: 6577333feab1e8e927014f03
-title: Step 63
+title: Paso 63
 challengeType: 20
 dashedName: step-63
 ---
@@ -45,7 +45,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -64,7 +64,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ):
 --fcc-editable-region--
             break
-    
+
     return password
 
 # new_password = generate_password(8)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657733bc97eb83efdb7e3988.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657733bc97eb83efdb7e3988.md
index 1a6ad451a06..d43b9793c9b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657733bc97eb83efdb7e3988.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657733bc97eb83efdb7e3988.md
@@ -1,6 +1,6 @@
 ---
 id: 657733bc97eb83efdb7e3988
-title: Step 64
+title: Paso 64
 challengeType: 20
 dashedName: step-64
 ---
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -57,7 +57,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ):
 --fcc-editable-region--
             break
-    
+
     return password
 
 # new_password = generate_password(8)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657dadf4d8b93c1704f3a57c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657dadf4d8b93c1704f3a57c.md
index 1bfd5e5a824..ec3d87c7507 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657dadf4d8b93c1704f3a57c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657dadf4d8b93c1704f3a57c.md
@@ -1,6 +1,6 @@
 ---
 id: 657dadf4d8b93c1704f3a57c
-title: Step 66
+title: Paso 66
 challengeType: 20
 dashedName: step-66
 ---
@@ -9,7 +9,7 @@ dashedName: step-66
 
 It works, but there are still a couple of things you can improve. First of all, calling a function with 5 arguments can create confusion on which value will be assigned to which parameter.
 
-You can call a function using keyword arguments, that is writing the parameter name explicitly followed by the assignment operator and the value. For example:
+You can call a function using keyword arguments, that is writing the parameter name explicitly followed by the assignment operator and the value. Por ejemplo:
 
 ```py
 def add(x, y):
@@ -39,7 +39,7 @@ import string
 
 
 def generate_password(length, nums, special_chars, uppercase, lowercase):
-   
+
     # Define the possible characters for the password
     letters = string.ascii_letters
     digits = string.digits
@@ -53,7 +53,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -67,9 +67,9 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 --fcc-editable-region-- 
 new_password = generate_password(8, 1, 1, 1, 1)
 print(new_password)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db2114b4029241956f5d6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db2114b4029241956f5d6.md
index b43d2b5be44..c8620f7fc96 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db2114b4029241956f5d6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db2114b4029241956f5d6.md
@@ -1,6 +1,6 @@
 ---
 id: 657db2114b4029241956f5d6
-title: Step 68
+title: Paso 68
 challengeType: 20
 dashedName: step-68
 ---
@@ -48,7 +48,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -62,9 +62,9 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 
 new_password = generate_password(nums=1, length=8, special_chars=1, uppercase=1, lowercase=1)
 print(new_password)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db4cb77190e33a20e852a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db4cb77190e33a20e852a.md
index c0ee80f692f..e3817f258a0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db4cb77190e33a20e852a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db4cb77190e33a20e852a.md
@@ -1,6 +1,6 @@
 ---
 id: 657db4cb77190e33a20e852a
-title: Step 69
+title: Paso 69
 challengeType: 20
 dashedName: step-69
 ---
@@ -43,7 +43,7 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -57,9 +57,9 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password(nums=1, length=8, special_chars=1, uppercase=1, lowercase=1)
 print(new_password)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
index 5a7a8e606dd..eded4c4a856 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
@@ -1,6 +1,6 @@
 ---
 id: 6551ecf597038c36637f3759
-title: Step 1
+title: Paso 1
 challengeType: 20
 dashedName: step-1
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
index 2e6d119b78b..ffc2bf74374 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
@@ -1,6 +1,6 @@
 ---
 id: 6551eebe6cbb2e6cadf9b468
-title: Step 2
+title: Paso 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -15,7 +15,7 @@ string_2 = 'I am also a string'
 string_3 = 'This is not valid"
 ```
 
-Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `Hello World` to this variable.
+Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `'Hello World'` to this variable.
 
 # --hints--
 
@@ -32,7 +32,7 @@ You should declare a variable called `text`. Pay attention to place the variable
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello World` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
+You should assign the string `'Hello World'` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello World\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
index d40877ed6af..2b65b4b4212 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
@@ -14,7 +14,7 @@ greet = 'Hello!'
 print(greet)
 ```
 
-The code in the example above would print the string `Hello!`, which is the value of the variable `greet` passed to `print()` as the argument.
+The code in the example above would print the string `'Hello!'`, which is the value of the variable `greet` passed to `print()` as the argument.
 
 Print your `text` variable to the screen by passing the `text` variable as the argument to the `print()` function.
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
index 86104aff4f6..3c229a13c41 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `Hello World`, `H` is at index `0`, `e` is at index `1`, and so on. 
+Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `'Hello World'`, `'H'` is at index `0`, `'e'` is at index `1`, and so on.
 
 Each character of a string can be accessed by using bracket notation. You need to write the variable name followed by square brackets and add the index of the character between the brackets:
 
@@ -20,7 +20,7 @@ Now, instead of printing `text`, print just the character at index `6`.
 
 # --hints--
 
-You should still call the `print()` function.
+Todavía debes llamar a la función `print()`.
 
 ```js
 assert.match(code, /print\s*\(.*\)/)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
index 5d0ae1dd2fa..3103cb653bf 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-You can see `11` printed on the terminal because `Hello World` contains 11 characters.
+You can see `11` printed on the terminal because `'Hello World'` contains 11 characters.
 
 Another useful built-in function is `type()`, which returns the data type of a variable. Modify your `print()` call to print the data type of `text`.
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
index cedb112a823..feea2a62b8e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
@@ -9,12 +9,12 @@ dashedName: step-12
 
 Key aspects of variable naming in Python are:
 
-- Some words are reserved keywords (e.g. `for`, `while`, `True`). They have a special meaning in Python, so you cannot use them for variable names.
-- Variable names cannot start with a number, and they can only contain alpha-numeric characters or underscores.
+- Algunas palabras son palabras clave reservadas (por ejemplo, `for`, `while`, `True`). Tienen un significado especial en Python, así que no puedes usarlos para nombres de variables.
+- Los nombres de variables no pueden comenzar con un número, y sólo pueden contener caracteres alfanuméricos o guiones bajos.
 - Variable names are case sensitive, i.e. `my_var` is different from `my_Var` and `MY_VAR`.
-- Finally, it is a common convention to write variable names using `snake_case`, where each space is replaced by an underscore character and the words are written in lowercase letters.
+- Finalmente, es una convención común escribir nombres de variables usando `snake_case`, donde cada espacio se sustituye por un carácter de guión bajo y las palabras se escriben en minúscula.
 
-Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `abcdefghijklmnopqrstuvwxyz` to this variable.
+Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `'abcdefghijklmnopqrstuvwxyz'` to this variable.
 
 # --hints--
 
@@ -38,7 +38,7 @@ You should declare a variable called `alphabet`. Pay attention to place the vari
 assert.match(code, /^alphabet\s*=/m)
 ```
 
-You should assign the string `abcdefghijklmnopqrstuvwxyz` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
+You should assign the string `'abcdefghijklmnopqrstuvwxyz'` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
 
 ```js
 assert.match(code, /^alphabet\s*=\s*("|')abcdefghijklmnopqrstuvwxyz\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
index abe8ced263d..5c272b6d6f1 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
@@ -15,7 +15,7 @@ Start by finding the position of the first letter in the string. One way is to c
 text.find('W')
 ```
 
-Above, uppercase `W` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `W` character inside the string stored in the `text` variable.
+Above, uppercase `'W'` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `'W'` character inside the string stored in the `text` variable.
 
 At the end of your code, call `.find()` on your `alphabet` string and pass `text[0]` to the method. Note that a method is just a function that belongs to an object (you will learn more about that in another project).
 
@@ -36,7 +36,7 @@ assert.match(code, /alphabet\.find\s*\(.*\)/)
 You should call the `.find()` method on the `alphabet` variable and pass `text[0]` to the method. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)/m)
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 412619ccc4c..3e3af82109c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -22,7 +22,7 @@ assert.match(code, /^index\s*=/m)
 You should assign the value returned by `alphabet.find(text[0])` to your `index` variable.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 34166fe3da4..83feddb9318 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `H`, is not found, since `alphabet` contains only lowercase letters.
+`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `'H'`, is not found, since `alphabet` contains only lowercase letters.
 
 You can transform a string into its lowercase equivalent with the `.lower()` method. Add another `print()` call to print `text.lower()` and see the output.
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index 54d47cf3f49..9a554ddeef1 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -27,7 +27,7 @@ assert.match(code, /^print\s*\(\s*index\s*\)/m);
 You should update your `alphabet.find(text[0])` call to use `text[0].lower()` as the argument. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index 95e2567fa84..e4c0036ebff 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-As you can see from the output, `h` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
+As you can see from the output, `'h'` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
 
 Modify your `shifted` variable so that it stores the value of `alphabet` at index `index + shift`.
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index 41811515713..a8da79ffd22 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -35,14 +35,14 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i/m)
 ```
 
-You should write the `in` keyword after `for i `. Make sure to leave a space around the `in` keyword.
+You should write the `in` keyword after `for i`. Make sure to leave a space around the `in` keyword.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i\s+in\s+/m)
 ```
 
-You should write `text` after `for i in `. Don't forget to add the final `:`.
+You should write `text` after `for i in`. Don't forget to add the final `:`.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index b7051de41c3..bdf47ed7c6f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -7,7 +7,7 @@ dashedName: step-42
 
 # --description--
 
-Currently, spaces get encrypted as `c`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
+Currently, spaces get encrypted as `'c'`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
 
 ```py
 if x != 0:
@@ -16,7 +16,7 @@ if x != 0:
 
 In the example above, the condition of the `if` statement is `x != 0`. The code `print(x)`, inside the `if` statement body, runs only when the condition evaluates to `True` (in this example, meaning that `x` is different from zero).
 
-At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `space!`. Remember to indent this line.
+At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `'space!'`. Remember to indent this line.
 
 # --hints--
 
@@ -36,7 +36,7 @@ const {block_body} = __helpers.python.getBlock(commentless_code, /for\s+char\s+i
 assert(block_body.match(/if\s+char\s*==\s*("|')\s\1\s*:/));
 ```
 
-You should print the string `space!` inside your new `if` statement.
+You should print the string `'space!'` inside your new `if` statement.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index 69191130521..f3fc108e506 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, instead of printing `space!`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
+Now, instead of printing `'space!'`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
 
 # --hints--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index dfc91239b0e..f6ea23b4325 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Try to assign the string `Hello Zaira` to your `text` variable and see what happens in the console.
+Try to assign the string `'Hello Zaira'` to your `text` variable and see what happens in the console.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have a `text` variable.
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello Zaira` to your `text` variable.
+You should assign the string `'Hello Zaira'` to your `text` variable.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello\sZaira\1/m)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index 5629c8d00fb..b5f4088d3b7 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -7,7 +7,7 @@ dashedName: step-58
 
 # --description--
 
-Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `python` to this variable.
+Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `'python'` to this variable.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should declare a variable called `custom_key`.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should assign the string `python` to your `custom_key` variable.
+You should assign the string `'python'` to your `custom_key` variable.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "python") })
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 179f7313a5d..47211f5e8bc 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -7,8 +7,7 @@ dashedName: step-59
 
 # --description--
 
-Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text.
-At the beginning of your function body, declare a `key_index` variable and set it to zero.
+Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text. At the beginning of your function body, declare a `key_index` variable and set it to zero.
 
 # --hints--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 660fb4ab263..7e452e05438 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
 
     for char in message.lower():
 --fcc-editable-region--
-        
+
         if char == ' ':
             encrypted_text += char
 --fcc-editable-region--            
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7727f6c57a8..7ca155b0c73 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -7,8 +7,7 @@ dashedName: step-62
 
 # --description--
 
-You will need to increase the `key_index` count for the next iteration.
-To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
+You will need to increase the `key_index` count for the next iteration. To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
 
 # --hints--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index 67567e88cdf..a6cd4a9a348 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
         if char == ' ':
             encrypted_text += char
         else:
-            
+
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index da202c1490a..7ca3ec197c0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -50,7 +50,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key):
             # Find the right key character to encode
             key_char = key[key_index % len(key)]
             key_index += 1
-            
+
 --fcc-editable-region--            
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index 7ca7c2f323a..f783cbf3472 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -32,7 +32,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -41,7 +41,7 @@ def vigenere(message, key):
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
-            
+
             offset = alphabet.index(key_char)
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index a371865b1ef..28c793c06c3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -55,7 +55,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index 60289b5525e..acf5b0f71c8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -43,7 +43,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -57,7 +57,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index b1f7c3a5caa..87f8a5aa7f3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -31,7 +31,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 534ff69ec91..84f3a8477e1 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -46,7 +46,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -60,9 +60,9 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index 3dfdd998a92..d29b009f3cf 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -47,9 +47,9 @@ def vigenere(message, key, direction):
             new_index = (index + offset) % len(alphabet)
 --fcc-editable-region--
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 #encryption = vigenere(text, custom_key)
 #print(encryption)
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 330871bc52a..9f1ea94390c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,9 +45,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 --fcc-editable-region--
 #encryption = vigenere(text, custom_key)
 #print(encryption)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index db2c5bdfe33..adf869e6b5f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index b4b329858a2..8e744b4c09f 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index f49b76f417f..cd7e9ce3a58 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -39,7 +39,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -53,7 +53,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index b295655e5c6..a6ecf2194d0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -38,7 +38,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -52,9 +52,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index 521f1f961d3..6941c8d1662 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -13,13 +13,13 @@ Check this by adding an exclamation mark at the end of the `text` string.
 
 # --hints--
 
-You should have a `text` variable.
+Debes tener una variable `text`.
 
 ```js
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should be equal to the string `Hello Zaira!`.
+Your `text` variable should be equal to the string `'Hello Zaira!'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "Hello Zaira!") })
@@ -40,7 +40,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -54,9 +54,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index f9dfeed2c7d..a60afdc14cc 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -53,9 +53,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index fa8531f3421..40bfdb53982 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -48,9 +48,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index aba2d5665d2..822b22f2743 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -46,9 +46,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index a8a4a146373..82df5c7e409 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -70,7 +70,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index 900a42440bf..ceda0450cc8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -51,7 +51,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index b37f689c14a..c0d946a1d38 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index d863b1b5667..e86470c6c34 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -51,15 +51,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index e7e001fd7b2..cb2c9d5e191 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -9,7 +9,7 @@ dashedName: step-86
 
 It works! Now, you are going to start with an encrypted message to be decrypted.
 
-Change the value of `text` to the string `mrttaqrhknsw ih puggrur`.
+Change the value of `text` to the string `'mrttaqrhknsw ih puggrur'`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should still have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should have the value of `mrttaqrhknsw ih puggrur`.
+Your `text` variable should have the value of `'mrttaqrhknsw ih puggrur'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "mrttaqrhknsw ih puggrur") })
@@ -54,15 +54,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = encrypt(text, custom_key)
 print(encryption)
 decryption = decrypt(encryption, custom_key)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index 7295239a2e5..a2e43552133 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -46,7 +46,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -60,9 +60,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 582c138e1b3..3cfffa05b63 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index 43650a129a7..b809b6cc227 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -9,11 +9,11 @@ dashedName: step-88
 
 Two or more strings can be concatenated by using the `+` operator. For example: `'Hello' + ' there!'` results in `'Hello there!`.
 
-Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `Encrypted text: `. Pay attention to the spacing.
+Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `'Encrypted text: '`. Pay attention to the spacing.
 
 # --hints--
 
-You should call `print()` and pass `'Encrypted text: ' + text` as the arguments. 
+You should call `print()` and pass `'Encrypted text: ' + text` as the arguments.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--    
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index 68b96128144..bb3bf128cf9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -7,11 +7,11 @@ dashedName: step-89
 
 # --description--
 
-Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 # --hints--
 
-You should have a `print()` call that prints `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+You should have a `print()` call that prints `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -52,12 +52,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index e52496dd150..6d5c9a3c856 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -7,7 +7,7 @@ dashedName: step-90
 
 # --description--
 
-In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings. 
+In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings.
 
 Interpolation means writing placeholders that will be replaced by the specified values when the program runs. For example, you can get the same result of `'Encrypted text: ' + text` with `f'Encrypted text: {text}'`. You need to put an `f` before the quotes to create the f-string and write the variables or expressions you want to interpolate between curly braces.
 
@@ -49,12 +49,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index ebdb8b79456..4e28d4737fc 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index 8e107b0fff4..d55577ba1cf 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -47,12 +47,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 0f916bf649e..073dfdcd2bb 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -50,12 +50,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 23af806c5ce..006a04850ea 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -7,7 +7,7 @@ dashedName: step-95
 
 # --description--
 
-Wait a minute! You cannot decrypt anything with the wrong key. Try with `happycoding`.
+Wait a minute! You cannot decrypt anything with the wrong key. Try with `'happycoding'`.
 
 With that, your cipher project is complete.
 
@@ -19,7 +19,7 @@ You should still have a `custom_key` variable.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should modify the `custom_key` value into `happycoding`.
+You should modify the `custom_key` value into `'happycoding'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "happycoding") })
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
@@ -96,12 +96,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 05c44517e6f..4a12df74cbe 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -7,51 +7,50 @@ dashedName: step-41
 
 # --description--
 
-Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare.
-They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
+Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare. They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
 
 Python has the following comparison operators:
 
 <table>
   <thead>
     <tr>
-      <th>Operator</th>
-      <th>Meaning</th>
+      <th>Operador</th>
+      <th>Significado</th>
     </tr>
   </thead>
   <tbody>
     <tr>
       <td>==</td>
-      <td>Equal</td>
+      <td>Igual</td>
     </tr>
     <tr>
       <td>!=</td>
-      <td>Not equal</td>
+      <td>Distinto</td>
     </tr>
     <tr>
       <td>&gt;</td>
-      <td>Greater than</td>
+      <td>Mayor que</td>
     </tr>
     <tr>
       <td>&lt;</td>
-      <td>Less than</td>
+      <td>Menor que</td>
     </tr>
     <tr>
       <td>&ge;</td>
-      <td>Greater than or equal to</td>
+      <td>Mayor o igual que</td>
     </tr>
     <tr>
       <td>&le;</td>
-      <td>Less than or equal to</td>
+      <td>Menor o igual que</td>
     </tr>
   </tbody>
 </table>
 
-At the beginning of your loop body, print the result of comparing `char` with an empty space (`' '`). Use the equality operator `==` for that.
+At the beginning of your loop body, print the result of comparing `char` with a space (`' '`). Use the equality operator `==` for that.
 
 # --hints--
 
-You should compare `char` with an empty space using the equality operator inside your `for` loop.
+You should compare `char` with a space using the equality operator inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -62,7 +61,7 @@ You should compare `char` with an empty space using the equality operator inside
 })
 ```
 
-You should print the result of comparing `char` with an empty space inside your `for` loop.
+You should print the result of comparing `char` with a space inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -73,7 +72,7 @@ You should print the result of comparing `char` with an empty space inside your
 })
 ```
 
-You should print the result of comparing `char` with an empty space at the beginning of your loop.
+You should print the result of comparing `char` with a space at the beginning of your loop.
 
 ```js
 ({ test: () => {
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 34e53a7cc4f..8dc4f897873 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -18,7 +18,7 @@ Give your `for` loop a body by adding a call to `print(i)`. Remember to indent t
 
 # --hints--
 
-You should add `print(i)` to your `for` loop body. Pay attention to the indentation. 
+You should add `print(i)` to your `for` loop body. Presta atención a la identación.
 
 ```js
 assert.match(code, /^for\s+i\s+in\s+text:\s+print\s*\(\s*i\s*\)/m)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index e7886b5f796..042349ee0a4 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -15,7 +15,7 @@ Restore the indentation for your `print(i)` call.
 
 # --hints--
 
-You should indent `print(i)` inside your `for` loop body. 
+You should indent `print(i)` inside your `for` loop body.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index 6215b77a724..f971dfe2276 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -13,7 +13,7 @@ Rename your `i` variable to `char`.
 
 # --hints--
 
-You should replace `i` with `char`. 
+You should replace `i` with `char`.
 
 ```js
 assert.match(code, /^for\s+char\s+in\s+text:\s+print\s*\(\s*char\s*\)/m)
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index b2203350e08..97fee73da43 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -7,7 +7,7 @@ dashedName: step-31
 
 # --description--
 
-Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `train`, but this is not valid:
+Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `'train'`, but this is not valid:
 
 ```py
 my_string = 'brain'
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index 39784236282..e2b04ef618e 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -14,7 +14,7 @@ message = 'Hello World'
 message = 'Hello there!'
 ```
 
-Delete the `text[0]` line and reassign `text` the string `Albatross`.
+Delete the `text[0]` line and reassign `text` the string `'Albatross'`.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*\[\s*0\s*\]\s*\=\s*("|')\w\1/.test(commentless_code));
 ```
 
-You should reassign `text` the string `Albatross`. Do not modify `text = 'Hello World'`.
+You should reassign `text` the string `'Albatross'`. Do not modify `text = 'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 076a71f8786..6b04513e34d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -20,7 +20,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*=\s*("|')Albatross\1/.test(commentless_code))
 ```
 
-You should still have a `text` variable with the value `Hello World`.
+You should still have a `text` variable with the value `'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index 442d9c6cb33..a98c25c7099 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index 71e999219ba..d239d653b25 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65560f9380be92226084ef46.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65560f9380be92226084ef46.md
index 4307d6a022e..2c58c37115b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65560f9380be92226084ef46.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65560f9380be92226084ef46.md
@@ -1,6 +1,6 @@
 ---
 id: 65560f9380be92226084ef46
-title: Step 1
+title: Paso 1
 challengeType: 20
 dashedName: step-1
 ---
@@ -11,7 +11,7 @@ In this project, you are going to create a Binary Search Tree (BST). A BST is a
 
 This is what a Binary Search Tree looks like:
 
-<img class="img-responsive center-block" src="https://cdn.freecodecamp.org/curriculum/python/bst-example.png" style="background-color: white; height:500px; width:500px; padding: 10px;">
+<img class="img-responsive center-block" src="https://cdn.freecodecamp.org/curriculum/python/bst-example.png" style="background-color: white; height:500px; width:500px; padding: 10px;" />
 
 Begin by defining an empty `TreeNode` class. The `TreeNode` class represents a node in a binary search tree. Use the `pass` keyword to fill the class body and avoid an error.
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65560ffdb7d05d248e012280.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65560ffdb7d05d248e012280.md
index d8d59540037..047b62460e2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65560ffdb7d05d248e012280.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65560ffdb7d05d248e012280.md
@@ -1,6 +1,6 @@
 ---
 id: 65560ffdb7d05d248e012280
-title: Step 2
+title: Paso 2
 challengeType: 20
 dashedName: step-2
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65561022956c1024e7184add.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65561022956c1024e7184add.md
index c23f515ffc4..d92823b02a8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65561022956c1024e7184add.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65561022956c1024e7184add.md
@@ -1,6 +1,6 @@
 ---
 id: 65561022956c1024e7184add
-title: Step 3
+title: Paso 3
 challengeType: 20
 dashedName: step-3
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a10e4a620fc091ba43b3d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a10e4a620fc091ba43b3d.md
index 8ad167aae63..5744d30ca18 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a10e4a620fc091ba43b3d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a10e4a620fc091ba43b3d.md
@@ -1,6 +1,6 @@
 ---
 id: 655a10e4a620fc091ba43b3d
-title: Step 4
+title: Paso 4
 challengeType: 20
 dashedName: step-4
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1188d6cfbb0a3ec63c57.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1188d6cfbb0a3ec63c57.md
index ea7008d12f5..01b4474caa2 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1188d6cfbb0a3ec63c57.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1188d6cfbb0a3ec63c57.md
@@ -1,13 +1,13 @@
 ---
 id: 655a1188d6cfbb0a3ec63c57
-title: Step 5
+title: Paso 5
 challengeType: 20
 dashedName: step-5
 ---
 
 # --description--
 
-Inside the `__init__` method, initialize the `left` and `right` attributes of the node to `None`. This is because when a node is first created, it doesn't have any left or right children. Remember to use the `self` keyword. 
+Inside the `__init__` method, initialize the `left` and `right` attributes of the node to `None`. This is because when a node is first created, it doesn't have any left or right children. Remember to use the `self` keyword.
 
 # --hints--
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a11eb4e54b60acd6bd641.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a11eb4e54b60acd6bd641.md
index 7dbe2e614a5..730c5ee3cd6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a11eb4e54b60acd6bd641.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a11eb4e54b60acd6bd641.md
@@ -1,6 +1,6 @@
 ---
 id: 655a11eb4e54b60acd6bd641
-title: Step 6
+title: Paso 6
 challengeType: 20
 dashedName: step-6
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a12c2ab0bcc0c2ba30e16.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a12c2ab0bcc0c2ba30e16.md
index ad3d91c513d..69de4e73ad8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a12c2ab0bcc0c2ba30e16.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a12c2ab0bcc0c2ba30e16.md
@@ -1,6 +1,6 @@
 ---
 id: 655a12c2ab0bcc0c2ba30e16
-title: Step 7
+title: Paso 7
 challengeType: 20
 dashedName: step-7
 ---
@@ -27,7 +27,7 @@ class TreeNode:
         self.key = key
         self.left = None
         self.right = None
-        
+
 --fcc-editable-region--
 class BinarySearchTree:
     pass
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a132b56e0160cfeca08d4.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a132b56e0160cfeca08d4.md
index bd1bcdc301c..6f90b021d40 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a132b56e0160cfeca08d4.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a132b56e0160cfeca08d4.md
@@ -1,13 +1,13 @@
 ---
 id: 655a132b56e0160cfeca08d4
-title: Step 8
+title: Paso 8
 challengeType: 20
 dashedName: step-8
 ---
 
 # --description--
 
-Inside the `__init__` method, delete `pass` and initialize an instance attribute called `root` to the value `None`. 
+Inside the `__init__` method, delete `pass` and initialize an instance attribute called `root` to the value `None`.
 
 The `root` attribute represents the root node of the binary search tree. Since this is the constructor when a new `BinarySearchTree` object is created, it starts with an empty tree, so the `root` attribute is set to `None`.
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a13744e82580d7ee3073d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a13744e82580d7ee3073d.md
index 0bf5aa9f477..d77e97afbef 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a13744e82580d7ee3073d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a13744e82580d7ee3073d.md
@@ -1,6 +1,6 @@
 ---
 id: 655a13744e82580d7ee3073d
-title: Step 9
+title: Paso 9
 challengeType: 20
 dashedName: step-9
 ---
@@ -32,6 +32,6 @@ class BinarySearchTree:
     def __init__(self):
         self.root = None
 
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a13aa8af2510de51f2e1c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a13aa8af2510de51f2e1c.md
index 5af0cce5c50..c97747081f0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a13aa8af2510de51f2e1c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a13aa8af2510de51f2e1c.md
@@ -1,6 +1,6 @@
 ---
 id: 655a13aa8af2510de51f2e1c
-title: Step 10
+title: Paso 10
 challengeType: 20
 dashedName: step-10
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a142ae611b30e5df0ac16.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a142ae611b30e5df0ac16.md
index ff35d66fb64..9e75857b257 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a142ae611b30e5df0ac16.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a142ae611b30e5df0ac16.md
@@ -1,6 +1,6 @@
 ---
 id: 655a142ae611b30e5df0ac16
-title: Step 11
+title: Paso 11
 challengeType: 20
 dashedName: step-11
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1479ba7e7c0ee6c1acdd.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1479ba7e7c0ee6c1acdd.md
index 724c23f0faf..6cf170cd5b0 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1479ba7e7c0ee6c1acdd.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1479ba7e7c0ee6c1acdd.md
@@ -1,6 +1,6 @@
 ---
 id: 655a1479ba7e7c0ee6c1acdd
-title: Step 12
+title: Paso 12
 challengeType: 20
 dashedName: step-12
 ---
@@ -44,6 +44,6 @@ class BinarySearchTree:
         self.root = self._insert(self.root, key)
 
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a14a6fe4cd50f38d01dd3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a14a6fe4cd50f38d01dd3.md
index 28a5a2947e6..185c2e480ea 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a14a6fe4cd50f38d01dd3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a14a6fe4cd50f38d01dd3.md
@@ -1,6 +1,6 @@
 ---
 id: 655a14a6fe4cd50f38d01dd3
-title: Step 13
+title: Paso 13
 challengeType: 20
 dashedName: step-13
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a151cc6041f0ff7d24ded.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a151cc6041f0ff7d24ded.md
index 72b9ed7243f..9cf8e8c985a 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a151cc6041f0ff7d24ded.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a151cc6041f0ff7d24ded.md
@@ -1,6 +1,6 @@
 ---
 id: 655a151cc6041f0ff7d24ded
-title: Step 14
+title: Paso 14
 challengeType: 20
 dashedName: step-14
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
index aa6e2e1a563..c4f977ea772 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
@@ -1,6 +1,6 @@
 ---
 id: 655a153a6b362d103e125028
-title: Step 15
+title: Paso 15
 challengeType: 20
 dashedName: step-15
 ---
@@ -16,13 +16,13 @@ Delete `pass` and recursively call the `_insert` method on the left child of the
 You should call the `self._insert` method passing `node.left` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the `left` attribute of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1564f3aa8210938cdf68.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1564f3aa8210938cdf68.md
index 6bd82bd207a..d2107b5d91b 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1564f3aa8210938cdf68.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1564f3aa8210938cdf68.md
@@ -1,6 +1,6 @@
 ---
 id: 655a1564f3aa8210938cdf68
-title: Step 16
+title: Paso 16
 challengeType: 20
 dashedName: step-16
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
index e83dc278aaf..12cd27b2eca 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
@@ -1,6 +1,6 @@
 ---
 id: 655a158c7e80c810f6eff1e1
-title: Step 17
+title: Paso 17
 challengeType: 20
 dashedName: step-17
 ---
@@ -14,13 +14,13 @@ Inside your `elif` clause, replace `pass` with a call to the `_insert` method on
 You should call the `self._insert()` method passing `node.right` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the right attribute (`node.right`) of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a15b683445611528cccf1.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a15b683445611528cccf1.md
index 6964fe986fc..ea0d3c7ff29 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a15b683445611528cccf1.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a15b683445611528cccf1.md
@@ -1,6 +1,6 @@
 ---
 id: 655a15b683445611528cccf1
-title: Step 18
+title: Paso 18
 challengeType: 20
 dashedName: step-18
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
index 3b8147e90c7..989eb539bb3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
@@ -1,6 +1,6 @@
 ---
 id: 655a167ea3e96512bf1343ce
-title: Step 20
+title: Paso 20
 challengeType: 20
 dashedName: step-20
 ---
@@ -25,7 +25,7 @@ You should call the `_search` method within the `search` method.
 You should call the `_search` method passing `self.root` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
index 9eae48476f6..68abcdc3532 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
@@ -1,6 +1,6 @@
 ---
 id: 655a16db1ccc5e132b5bc44d
-title: Step 21
+title: Paso 21
 challengeType: 20
 dashedName: step-21
 ---
@@ -14,7 +14,7 @@ Now, make the `search` method return the result of the `_search()` call.
 You should prepend the `return` statement to your `_search()` call.
 
 ```js
-({ test: () => assert.match(code, /return\s+self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /return\s+self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a173e5b8adc13b761ed74.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a173e5b8adc13b761ed74.md
index 9d1be56907e..159e61ce6b3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a173e5b8adc13b761ed74.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a173e5b8adc13b761ed74.md
@@ -1,6 +1,6 @@
 ---
 id: 655a173e5b8adc13b761ed74
-title: Step 22
+title: Paso 22
 challengeType: 20
 dashedName: step-22
 ---
@@ -52,8 +52,8 @@ class BinarySearchTree:
 
     def search(self, key):
         return self._search(self.root, key)
-        
+
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a194276dfa11460f7b5e3.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a194276dfa11460f7b5e3.md
index 94686a45d25..b52a2219bf7 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a194276dfa11460f7b5e3.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a194276dfa11460f7b5e3.md
@@ -1,6 +1,6 @@
 ---
 id: 655a194276dfa11460f7b5e3
-title: Step 23
+title: Paso 23
 challengeType: 20
 dashedName: step-23
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
index 48c326b2a56..126a26f5c26 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
@@ -1,6 +1,6 @@
 ---
 id: 655a1a6d8c44db154b00c909
-title: Step 24
+title: Paso 24
 challengeType: 20
 dashedName: step-24
 ---
@@ -22,8 +22,8 @@ assert.match(after_split, /if\s+key\s+<\s+node\.key/);
 
 You should return `self._search(node.left, key)` from your new `if` block.
 
-```js    
-({ test: () => assert.match(code, /return\s+self\._search\(node\.left,\s*key\)/) });    
+```js
+({ test: () => assert.match(code, /return\s+self\._search\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a227e57aabb25d1f9c987.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a227e57aabb25d1f9c987.md
index 4d8af5046cf..145cfb0d8f1 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a227e57aabb25d1f9c987.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a227e57aabb25d1f9c987.md
@@ -1,6 +1,6 @@
 ---
 id: 655a227e57aabb25d1f9c987
-title: Step 19
+title: Paso 19
 challengeType: 20
 dashedName: step-19
 ---
@@ -54,6 +54,6 @@ class BinarySearchTree:
         return node
 
 --fcc-editable-region--
-    
+
 --fcc-editable-region-- 
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
index 37663f843ae..cc7b147e4a3 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
@@ -1,13 +1,13 @@
 ---
 id: 655a44442b60ee5a28df8ee5
-title: Step 25
+title: Paso 25
 challengeType: 20
 dashedName: step-25
 ---
 
 # --description--
 
-If the second `if` statement is not `True`, it means that the target key is greater than or equal to the current node key. 
+If the second `if` statement is not `True`, it means that the target key is greater than or equal to the current node key.
 
 In a binary search tree, if the target key is greater than the current node's key, the search continues in the right subtree.
 
@@ -25,14 +25,14 @@ assert.match(after_split, /self\._search/);
 You should pass two arguments to the call of the `_search` method: `node.right` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should return the result of the `_search` method call.
 
 ```js
 ({
-  test: () => assert.match(code, /return\s+self\._search\(node\.right,\s*key\)/)
+  test: () => assert.match(code, /return\s+self\._search\(\s*node\.right,\s*key\s*\)/)
 });
 ```
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
index 2a8c3b67fa5..dad4f88c3a9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
@@ -1,6 +1,6 @@
 ---
 id: 655a452d40556e5c25e4aac8
-title: Step 26
+title: Paso 26
 challengeType: 20
 dashedName: step-26
 ---
@@ -18,7 +18,7 @@ Within the `BinarySearchTree` class, define a `delete` method. It takes two para
 You should define a `delete` method with two parameters: `self` and `key`. Remember to use `pass`.
 
 ```js
-({ test: () => assert.match(code, /def\s+delete\(self,\s*key\)/) });
+({ test: () => assert.match(code, /def\s+delete\(\s*self,\s*key\s*\)/) });
 ```
 
 # --seed--
@@ -58,6 +58,6 @@ class BinarySearchTree:
             return self._search(node.left, key)
         return self._search(node.right, key)
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
index 377aa20b540..c86d0564aa4 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
@@ -1,6 +1,6 @@
 ---
 id: 655a45c52fa3ea5ece3034c7
-title: Step 27
+title: Paso 27
 challengeType: 20
 dashedName: step-27
 ---
@@ -14,7 +14,7 @@ Inside the `delete` method, delete `pass` and call the private helper method `_d
 Your `delete` method should call the `_delete` method with two arguments: `self.root` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
index b62541d5517..14f2c52b52c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
@@ -1,6 +1,6 @@
 ---
 id: 655a4614304cd36031cb4e75
-title: Step 28
+title: Paso 28
 challengeType: 20
 dashedName: step-28
 ---
@@ -16,7 +16,7 @@ To handle this case, assign the result of the `_delete` call to `self.root`.
 You should assign the result of the `_delete()` call to `self.root`.
 
 ```js
-({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
index bf6f2ab4ffe..1aaf8795ea5 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
@@ -1,6 +1,6 @@
 ---
 id: 655a46aa8e10c26218c5034c
-title: Step 29
+title: Paso 29
 challengeType: 20
 dashedName: step-29
 ---
@@ -14,7 +14,7 @@ Inside the `BinarySearchTree` class, define a new helper method called `_delete`
 You should define the `_delete` method inside the `BinarySearchTree` class with the parameters `self`, `node` and `key`. Remember to use the `pass` keyword.
 
 ```js
-assert.match(code, /def\s+_delete\(self,\s*node,\s*key\)/);
+assert.match(code, /def\s+_delete\(\s*self,\s*node,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46fce0ce5a638c180e36.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46fce0ce5a638c180e36.md
index f27c86f8edd..f044e049bbb 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46fce0ce5a638c180e36.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46fce0ce5a638c180e36.md
@@ -1,6 +1,6 @@
 ---
 id: 655a46fce0ce5a638c180e36
-title: Step 30
+title: Paso 30
 challengeType: 20
 dashedName: step-30
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4761e1a40065fc4d3712.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4761e1a40065fc4d3712.md
index 5b2008d711e..d0d682c9de9 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4761e1a40065fc4d3712.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4761e1a40065fc4d3712.md
@@ -1,6 +1,6 @@
 ---
 id: 655a4761e1a40065fc4d3712
-title: Step 31
+title: Paso 31
 challengeType: 20
 dashedName: step-31
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
index 9c3f6fd608d..15b1355c459 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
@@ -1,6 +1,6 @@
 ---
 id: 655a47a9404d856743c7f529
-title: Step 32
+title: Paso 32
 challengeType: 20
 dashedName: step-32
 ---
@@ -14,13 +14,13 @@ Within the `if` block, replace `pass` with a call to the `_delete` method, passi
 You should call the `_delete` method with `node.left` and the `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to the left child (`node.left`) of the current node.
 
 ```js
-assert.match(code, /node\.left\s*=\s*self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /node\.left\s*=\s*self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
index c245f9a5312..ddaed382dd7 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
@@ -1,6 +1,6 @@
 ---
 id: 655a482dfc92896901b9c97e
-title: Step 33
+title: Paso 33
 challengeType: 20
 dashedName: step-33
 ---
@@ -23,13 +23,13 @@ assert.match(after_split, /elif\s+key\s+>\s+node\.key/);
 You should call the `_delete` method with `node.right` and `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to `node.right`.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a489d83b1996bd537b153.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a489d83b1996bd537b153.md
index a22b30cf3e3..8bc5bd0b328 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a489d83b1996bd537b153.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a489d83b1996bd537b153.md
@@ -1,6 +1,6 @@
 ---
 id: 655a489d83b1996bd537b153
-title: Step 34
+title: Paso 34
 challengeType: 20
 dashedName: step-34
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a48da2c25656d2f7bab4d.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a48da2c25656d2f7bab4d.md
index e700407e789..5654016a401 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a48da2c25656d2f7bab4d.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a48da2c25656d2f7bab4d.md
@@ -1,6 +1,6 @@
 ---
 id: 655a48da2c25656d2f7bab4d
-title: Step 35
+title: Paso 35
 challengeType: 20
 dashedName: step-35
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a493ab909a96f7c316cd5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a493ab909a96f7c316cd5.md
index 0324bdcf005..64658f28826 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a493ab909a96f7c316cd5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a493ab909a96f7c316cd5.md
@@ -1,6 +1,6 @@
 ---
 id: 655a493ab909a96f7c316cd5
-title: Step 36
+title: Paso 36
 challengeType: 20
 dashedName: step-36
 ---
@@ -13,7 +13,7 @@ If the previous condition is met, it means there is no right child. So, return t
 
 # --hints--
 
-You should create an `elif` statement that checks if the right child of the current node is `None`. 
+You should create an `elif` statement that checks if the right child of the current node is `None`.
 
 ```js
 assert.match(code, /elif\s+node\.right\s+is\s+None/);
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
index 2beb359e6fc..b1fb8756256 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
@@ -1,6 +1,6 @@
 ---
 id: 655a4ffc762d117470b94e3b
-title: Step 37
+title: Paso 37
 challengeType: 20
 dashedName: step-37
 ---
@@ -9,8 +9,7 @@ dashedName: step-37
 
 If neither one of the previous conditions is met, it means the node has both left and right children.
 
-To choose the successor, you need to find the minimum value in the right subtree.
-The smallest value will be the in-order successor of the current node.
+To choose the successor, you need to find the minimum value in the right subtree. The smallest value will be the in-order successor of the current node.
 
 Later on, you are going to define a helper method called `_min_value` that finds the smallest value in a given subtree.
 
@@ -21,7 +20,7 @@ For now, add a `_min_value` call after your `elif` block, passing `node.right` a
 You should assign `self._min_value(node.right)` to `node.key` after your `elif` block.
 
 ```js
-assert.match(code, /node\.key\s*=\s*self\._min_value\(node\.right\)/);
+assert.match(code, /node\.key\s*=\s*self\._min_value\(\s*node\.right\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
index 76ef5b24f04..3e8f08cd2e6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
@@ -1,6 +1,6 @@
 ---
 id: 655a50f992ba7177aff2b718
-title: Step 38
+title: Paso 38
 challengeType: 20
 dashedName: step-38
 ---
@@ -22,7 +22,7 @@ assert.match(code, /self\._delete\(\s*node\.right\s*,\s*node\.key\s*/);
 You should assign the return value of the `_delete()` call to the right child of the current node.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right\,\s*node\.key/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right\,\s*node\.key/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a515f4b85ce79464fe5e8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a515f4b85ce79464fe5e8.md
index 4fc01474424..8dd35332d28 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a515f4b85ce79464fe5e8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a515f4b85ce79464fe5e8.md
@@ -1,6 +1,6 @@
 ---
 id: 655a515f4b85ce79464fe5e8
-title: Step 39
+title: Paso 39
 challengeType: 20
 dashedName: step-39
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a51a705c97d7a9294ab2a.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a51a705c97d7a9294ab2a.md
index 35a339c8923..4b3cc5a9f87 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a51a705c97d7a9294ab2a.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a51a705c97d7a9294ab2a.md
@@ -1,14 +1,13 @@
 ---
 id: 655a51a705c97d7a9294ab2a
-title: Step 40
+title: Paso 40
 challengeType: 20
 dashedName: step-40
 ---
 
 # --description--
 
-When the node you want to delete has two children, you need to choose the replacement node from the children. 
-The in-order successor method chooses the smallest element from the right subtree and places that element in place of the deleted node.
+When the node you want to delete has two children, you need to choose the replacement node from the children. The in-order successor method chooses the smallest element from the right subtree and places that element in place of the deleted node.
 
 Define the `_min_value` method and give it two parameters: `self` and `node`.
 
@@ -78,6 +77,6 @@ class BinarySearchTree:
             node.right = self._delete(node.right, node.key)
         return node
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a51ff908edc7c12c3a92c.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a51ff908edc7c12c3a92c.md
index b63d2b40f74..c07ecbe3f40 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a51ff908edc7c12c3a92c.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a51ff908edc7c12c3a92c.md
@@ -1,6 +1,6 @@
 ---
 id: 655a51ff908edc7c12c3a92c
-title: Step 41
+title: Paso 41
 challengeType: 20
 dashedName: step-41
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a523d4bbc8b7d3848d7dd.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a523d4bbc8b7d3848d7dd.md
index 5ec2859f695..bb96c5fcd21 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a523d4bbc8b7d3848d7dd.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a523d4bbc8b7d3848d7dd.md
@@ -1,6 +1,6 @@
 ---
 id: 655a523d4bbc8b7d3848d7dd
-title: Step 42
+title: Paso 42
 challengeType: 20
 dashedName: step-42
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a52bca925967fa2336190.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a52bca925967fa2336190.md
index 710f4b77ac6..e858f30ff45 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a52bca925967fa2336190.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a52bca925967fa2336190.md
@@ -1,6 +1,6 @@
 ---
 id: 655a52bca925967fa2336190
-title: Step 43
+title: Paso 43
 challengeType: 20
 dashedName: step-43
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a536e99be288210f01451.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a536e99be288210f01451.md
index 04a6eb28175..dba417a1489 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a536e99be288210f01451.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a536e99be288210f01451.md
@@ -1,6 +1,6 @@
 ---
 id: 655a536e99be288210f01451
-title: Step 44
+title: Paso 44
 challengeType: 20
 dashedName: step-44
 ---
@@ -84,6 +84,6 @@ class BinarySearchTree:
             node = node.left
         return node.key
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5489c62889851c60ff4b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5489c62889851c60ff4b.md
index bd138259019..3bd26b1689d 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5489c62889851c60ff4b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5489c62889851c60ff4b.md
@@ -1,6 +1,6 @@
 ---
 id: 655a5489c62889851c60ff4b
-title: Step 45
+title: Paso 45
 challengeType: 20
 dashedName: step-45
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
index 435d1ddb00b..bdc4ca464eb 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
@@ -1,6 +1,6 @@
 ---
 id: 655a54cd88e33b8646c67e16
-title: Step 46
+title: Paso 46
 challengeType: 20
 dashedName: step-46
 ---
@@ -16,7 +16,7 @@ This will start the traversal from the root of the binary search tree (`self.roo
 You should call `_inorder_traversal` and pass `self.root` and `result` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._inorder_traversal\(self\.root,\s*result\)/) })
+({ test: () => assert.match(code, /self\._inorder_traversal\(\s*self\.root,\s*result\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54fd97ada88722fa5c8b.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54fd97ada88722fa5c8b.md
index f5eac694731..f96eeb9d666 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54fd97ada88722fa5c8b.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54fd97ada88722fa5c8b.md
@@ -1,6 +1,6 @@
 ---
 id: 655a54fd97ada88722fa5c8b
-title: Step 47
+title: Paso 47
 challengeType: 20
 dashedName: step-47
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
index 9cf008b9e41..a5a64bd7c84 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
@@ -1,6 +1,6 @@
 ---
 id: 655a552337ee62882fdeee79
-title: Step 48
+title: Paso 48
 challengeType: 20
 dashedName: step-48
 ---
@@ -14,7 +14,7 @@ Define the `_inorder_traversal` method and give it three parameters: `self`, `no
 You should define a method `_inorder_traversal` that takes three parameters: `self`, `node`, and `result`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+_inorder_traversal\(self,\s*node,\s*result\)/);
+assert.match(code, /def\s+_inorder_traversal\(\s*self,\s*node,\s*result\s*\)/);
 ```
 
 # --seed--
@@ -84,6 +84,6 @@ class BinarySearchTree:
         self._inorder_traversal(self.root, result)
         return result
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
index 65729d86c26..4695b8a6d59 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
@@ -1,6 +1,6 @@
 ---
 id: 655a557104bb878962e2ae95
-title: Step 49
+title: Paso 49
 challengeType: 20
 dashedName: step-49
 ---
@@ -20,7 +20,7 @@ assert.match(code, /if\s+node:/);
 You should call `_inorder_traversal` on the `node.left` inside the `if` block.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.left\s*,\s*result\s*\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.left\s*,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
index c0a7340cd41..de91c7a25ad 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
@@ -1,6 +1,6 @@
 ---
 id: 655a5607eec63b8c2b1d7087
-title: Step 50
+title: Paso 50
 challengeType: 20
 dashedName: step-50
 ---
@@ -14,7 +14,7 @@ Still inside the `if` block, append the `key` of the current node to the `result
 You should append `node.key` to the `result` list.
 
 ```js
-assert.match(code, /result\.append\(node\.key\)/);
+assert.match(code, /result\.append\(\s*node\.key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
index 8bcee4f0320..8c2aa90a476 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
@@ -1,6 +1,6 @@
 ---
 id: 655a5637ad283d8d24dd49de
-title: Step 52
+title: Paso 52
 challengeType: 20
 dashedName: step-52
 ---
@@ -16,13 +16,13 @@ Create an instance of the `BinarySearchTree` class and assign it to the variable
 You should create an instance of the `BinarySearchTree` class.
 
 ```js
-assert.match(code, /BinarySearchTree\(\)/);
+assert.match(code, /BinarySearchTree\(\s*\)/);
 ```
 
 You should assign the new instance of `BinarySearchTree` to the variable `bst`.
 
 ```js
-assert.match(code, /bst\s*=\s*BinarySearchTree\(\)/);
+assert.match(code, /bst\s*=\s*BinarySearchTree\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
index 4c7f1676c27..43fd021c173 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
@@ -1,6 +1,6 @@
 ---
 id: 655a56a6a1168a8f201ba666
-title: Step 53
+title: Paso 53
 challengeType: 20
 dashedName: step-53
 ---
@@ -20,7 +20,7 @@ assert.match(code, /nodes/);
 Your `node` variable should have the value `[50, 30, 20, 40, 70, 60, 80]`.
 
 ```js
-assert.match(code, /nodes\s*=\s*\[50,\s*30,\s*20,\s*40,\s*70,\s*60,\s*80\]/);
+assert.match(code, /nodes\s*=\s*\[\s*50\s*,\s*30\s*,\s*20\s*,\s*40\s*\s*,\s*70\s*,\s*60\s*,\s*80\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56dc4749dc906fac6802.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56dc4749dc906fac6802.md
index 1c9d6cb8d6a..c8dc3c717c6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56dc4749dc906fac6802.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56dc4749dc906fac6802.md
@@ -1,6 +1,6 @@
 ---
 id: 655a56dc4749dc906fac6802
-title: Step 54
+title: Paso 54
 challengeType: 20
 dashedName: step-54
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
index 32b2f2a450b..1140b48246c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
@@ -1,6 +1,6 @@
 ---
 id: 655a577302a8a791ed62e8d9
-title: Step 51
+title: Paso 51
 challengeType: 20
 dashedName: step-51
 ---
@@ -16,7 +16,7 @@ This recursive call explores the entire right subtree in an in-order manner.
 You should call `_inorder_traversal` passing `node.right` and `result` as the arguments.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.right,\s*result\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.right,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a57bf1d702b936f788b70.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a57bf1d702b936f788b70.md
index 6a2f0b21388..2045fb7b7a6 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a57bf1d702b936f788b70.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a57bf1d702b936f788b70.md
@@ -1,6 +1,6 @@
 ---
 id: 655a57bf1d702b936f788b70
-title: Step 55
+title: Paso 55
 challengeType: 20
 dashedName: step-55
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a580da8b2419496c88f61.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a580da8b2419496c88f61.md
index e050aa88887..a45f1a397ae 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a580da8b2419496c88f61.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a580da8b2419496c88f61.md
@@ -1,6 +1,6 @@
 ---
 id: 655a580da8b2419496c88f61
-title: Step 56
+title: Paso 56
 challengeType: 20
 dashedName: step-56
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
index c3f2ecfe1bc..f8c75247da4 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
@@ -1,6 +1,6 @@
 ---
 id: 655a585b87885d962f715a10
-title: Step 57
+title: Paso 57
 challengeType: 20
 dashedName: step-57
 ---
@@ -16,7 +16,7 @@ To change that to print a useful value, define another method named `__str__` in
 You should define a method `__str__` that takes a single argument `self`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+__str__\(self\)/);
+assert.match(code, /def\s+__str__\(\s*self\s*\)/);
 ```
 
 # --seed--
@@ -31,7 +31,7 @@ class TreeNode:
         self.right = None
 
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 
 class BinarySearchTree:
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
index a0dd8dd7b6a..b54b97d4a43 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
@@ -1,6 +1,6 @@
 ---
 id: 655a58897968829714d6e359
-title: Step 58
+title: Paso 58
 challengeType: 20
 dashedName: step-58
 ---
@@ -14,7 +14,7 @@ In the body of the `__str__` method, delete `pass` and return the result of call
 You should return the string value of `self.key` from your `__str__` method.
 
 ```js
-({ test: () => assert.match(code, /^\s{8}return\s+str\(self\.key\)/m) })
+({ test: () => assert.match(code, /^\s{8}return\s+str\(\s*self\.key\s*\)/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58b2951601981fb893c8.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58b2951601981fb893c8.md
index 584dca42b97..c0fae602904 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58b2951601981fb893c8.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58b2951601981fb893c8.md
@@ -1,6 +1,6 @@
 ---
 id: 655a58b2951601981fb893c8
-title: Step 59
+title: Paso 59
 challengeType: 20
 dashedName: step-59
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5908085cdf99b7630646.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5908085cdf99b7630646.md
index 0c273694135..17346810781 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5908085cdf99b7630646.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5908085cdf99b7630646.md
@@ -1,6 +1,6 @@
 ---
 id: 655a5908085cdf99b7630646
-title: Step 60
+title: Paso 60
 challengeType: 20
 dashedName: step-60
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a59607b0d2e9b0f5d69e5.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a59607b0d2e9b0f5d69e5.md
index 9469c66566b..a239ce3ea44 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a59607b0d2e9b0f5d69e5.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a59607b0d2e9b0f5d69e5.md
@@ -1,6 +1,6 @@
 ---
 id: 655a59607b0d2e9b0f5d69e5
-title: Step 61
+title: Paso 61
 challengeType: 20
 dashedName: step-61
 ---
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/arithmetic-formatter.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/arithmetic-formatter.md
index 232fdf3cc95..d108db35c39 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/arithmetic-formatter.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/arithmetic-formatter.md
@@ -1,6 +1,6 @@
 ---
 id: 5e44412c903586ffb414c94c
-title: Arithmetic Formatter
+title: Formateador aritmético
 challengeType: 10
 forumTopicId: 462359
 dashedName: arithmetic-formatter
@@ -8,16 +8,16 @@ dashedName: arithmetic-formatter
 
 # --description--
 
-You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-arithmetic-formatter" target="_blank" rel="noopener noreferrer nofollow"> working on this project with our Replit starter code</a>.
+Estarás <a href="https://replit.com/github/freeCodeCamp/boilerplate-arithmetic-formatter" target="_blank" rel="noopener noreferrer nofollow">trabajando en este proyecto con nuestro código inicial en Replit</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Comienza importando el proyecto en Replit.
+-   Después verás una ventana `.replit`
+-   Selecciona `Use run command` y presiona el botón `Done`
 
 
 # --instructions--
 
-Students in primary school often arrange arithmetic problems vertically to make them easier to solve. For example, "235 + 52" becomes:
+Los estudiantes de primaria suelen colocar los problemas aritméticos en vertical para facilitar su resolución. Por ejemplo, "235 + 52" se convierte a:
 
 ```py
   235
@@ -25,17 +25,17 @@ Students in primary school often arrange arithmetic problems vertically to make
 -----
 ```
 
-Create a function that receives a list of strings that are arithmetic problems and returns the problems arranged vertically and side-by-side. The function should optionally take a second argument. When the second argument is set to `True`, the answers should be displayed.
+Crea una función que reciba una lista de cadenas que sean problemas aritméticos y devuelva los problemas ordenados verticalmente y uno al lado del otro. La función debe tomar opcionalmente un segundo argumento. Cuando el segundo argumento se establezca como `True`, se deberán mostrar las respuestas.
 
-## Example
+## Ejemplo
 
-Function Call:
+Llamando a la función:
 
 ```py
 arithmetic_arranger(["32 + 698", "3801 - 2", "45 + 43", "123 + 49"])
 ```
 
-Output:
+Resultado:
 
 ```py
    32      3801      45      123
@@ -43,13 +43,13 @@ Output:
 -----    ------    ----    -----
 ```
 
-Function Call:
+Llamando a la función:
 
 ```py
 arithmetic_arranger(["32 + 8", "1 - 3801", "9999 + 9999", "523 - 49"], True)
 ```
 
-Output:
+Resultado:
 
 ```py
   32         1      9999      523
@@ -58,41 +58,37 @@ Output:
   40     -3800     19998      474
 ```
 
-## Rules
+## Reglas
 
-The function will return the correct conversion if the supplied problems are properly formatted, otherwise, it will **return** a **string** that describes an error that is meaningful to the user.
+La función devolverá la conversión correcta si los problemas suministrados están correctamente formateados, de lo contrario, **devolverá** una **cadena** que describe un error significativo para el usuario.
 
 
-- Situations that will return an error:
-  - If there are **too many problems** supplied to the function. The limit is **five**, anything more will return:
-    `Error: Too many problems.`
-  - The appropriate operators the function will accept are **addition** and **subtraction**. Multiplication and division will return an error. Other operators not mentioned in this bullet point will not need to be tested. The error returned will be:
-    `Error: Operator must be '+' or '-'.`
-  - Each number (operand) should only contain digits. Otherwise, the function will return:
-    `Error: Numbers must only contain digits.`
-  - Each operand (aka number on each side of the operator) has a max of four digits in width. Otherwise, the error string returned will be:
-    `Error: Numbers cannot be more than four digits.`
-- If the user supplied the correct format of problems, the conversion you return will follow these rules:
-  - There should be a single space between the operator and the longest of the two operands, the operator will be on the same line as the second operand, both operands will be in the same order as provided (the first will be the top one and the second will be the bottom).
-  - Numbers should be right-aligned.
-  - There should be four spaces between each problem.
-  - There should be dashes at the bottom of each problem. The dashes should run along the entire length of each problem individually. (The example above shows what this should look like.)
+- Situaciones que devolverán un error:
+  - Si se pasan **demasiados problemas** a la función. El límite es **cinco**, si se pasan más se devolverá: `Error: Too many problems.`
+  - Los únicos operadores que aceptará la función son **adición** y **sustracción**. Multiplicación y división devolverán un error. Otros operadores no mencionados en este punto no necesitarán ser probados. El error devuelto será: `Error: Operator must be '+' or '-'.`
+  - Cada número (operando) solo debe contener dígitos. En otro caso, la función devolverá: `Error: Numbers must only contain digits.`
+  - Cada operando (los números a cada lado del operador) tiene que tener un máximo de cuatro dígitos. En otro caso, la cadena de error devuelta será: `Error: Numbers cannot be more than four digits.`
+- Si el usuario proporciona a la función los problemas con el formato correcto, la conversión a devolver por la función seguirá las siguientes reglas:
+  - Debe haber un solo espacio entre el operador y el operando más largo, el operador estará en la misma línea que el segundo operando, ambos operandos estarán en el mismo orden en que fueron pasados (el primero será el que aparezca arriba y el segundo estará debajo).
+  - Los números deben estar alineados a la derecha.
+  - Debe haber cuatro espacios entre cada problema.
+  - Debe haber guiones (-) al final de cada problema. Dichos guiones deben extenderse a lo largo de la longitud de cada problema por separado. (Véase el ejemplo más arriba.)
 
-## Development
+## Desarrollo
 
-Write your code in `arithmetic_arranger.py`. For development, you can use `main.py` to test your `arithmetic_arranger()` function. Click the "run" button and `main.py` will run.
+Escribe tu código en `arithmetic_arranger.py`. Durante el desarrollo de tu programa puedes utilizar `main.py` para probar el funcionamiento de tu función `arithmetic_arranger()`. Haz clic en el botón "run" y se ejecutará `main.py`.
 
-## Testing
+## Pruebas
 
-The unit tests for this project are in `test_module.py`. We are running the tests from `test_module.py` in `main.py` for your convenience. The tests will run automatically whenever you hit the "run" button. Alternatively you may run the tests by inputting `pytest` in the console.
+Las pruebas unitarias para este proyecto están en `test_module.py`. Ejecutamos las pruebas de `test_module.py` a `main.py` para tu conveniencia. Las pruebas se ejecutarán automáticamente cada vez que pulses el botón "run". También puedes ejecutar las pruebas introduciendo `pytest` en la consola.
 
-## Submitting
+## Envío
 
-Copy your project's URL and submit it to freeCodeCamp.
+Copia el enlace de tu proyecto y envíalo a freeCodeCamp.
 
 # --hints--
 
-It should correctly format an arithmetic problem and pass all tests.
+Debe formatear correctamente un problema aritmético y pasar todas las pruebas.
 
 ```js
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/budget-app.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/budget-app.md
index 941e681c22c..232769377dd 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/budget-app.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/budget-app.md
@@ -1,6 +1,6 @@
 ---
 id: 5e44413e903586ffb414c94e
-title: Budget App
+title: Aplicación de presupuesto
 challengeType: 10
 forumTopicId: 462361
 dashedName: budget-app
@@ -8,30 +8,30 @@ dashedName: budget-app
 
 # --description--
 
-You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-budget-app" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
+Estarás <a href="https://replit.com/github/freeCodeCamp/boilerplate-budget-app" target="_blank" rel="noopener noreferrer nofollow">trabajando en este proyecto con nuestro código inicial en Replit</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Comienza importando el proyecto en Replit.
+-   A continuación verás una ventana `.replit`
+-   Selecciona `Use run command` y presiona el botón `Done`
 
 
 # --instructions--
 
-Complete the `Category` class in `budget.py`. It should be able to instantiate objects based on different budget categories like *food*, *clothing*, and *entertainment*. When objects are created, they are passed in the name of the category. The class should have an instance variable called `ledger` that is a list. The class should also contain the following methods:
+Complete la clase `Category` en `budget.py`. Debería poder instanciar objetos en función de diferentes categorías presupuestarias como *comida*, *ropa* y *entretenimiento*. Cuando se crean objetos, se pasan en el nombre de la categoria. La clase debe tener como instancia una variable llamada `ledger` (esta es una lista). La clase debe contener también los siguientes metodos:
 
-- A `deposit` method that accepts an amount and description. If no description is given, it should default to an empty string. The method should append an object to the ledger list in the form of `{"amount": amount, "description": description}`.
+- Un método `deposit` que acepta una cantidad y una descripción. If no description is given, it should default to an empty string. The method should append an object to the ledger list in the form of `{"amount": amount, "description": description}`.
 - A `withdraw` method that is similar to the `deposit` method, but the amount passed in should be stored in the ledger as a negative number. If there are not enough funds, nothing should be added to the ledger. This method should return `True` if the withdrawal took place, and `False` otherwise.
 - A `get_balance` method that returns the current balance of the budget category based on the deposits and withdrawals that have occurred.
 - A `transfer` method that accepts an amount and another budget category as arguments. The method should add a withdrawal with the amount and the description "Transfer to [Destination Budget Category]". The method should then add a deposit to the other budget category with the amount and the description "Transfer from [Source Budget Category]". If there are not enough funds, nothing should be added to either ledgers. This method should return `True` if the transfer took place, and `False` otherwise.
 - A `check_funds` method that accepts an amount as an argument. It returns `False` if the amount is greater than the balance of the budget category and returns `True` otherwise. This method should be used by both the `withdraw` method and `transfer` method.
 
-When the budget object is printed it should display:
+Cuando el objeto de presupuesto se imprime, debe mostrar:
 
 - A title line of 30 characters where the name of the category is centered in a line of `*` characters.
 - A list of the items in the ledger. Each line should show the description and amount. The first 23 characters of the description should be displayed, then the amount. The amount should be right aligned, contain two decimal places, and display a maximum of 7 characters.
 - A line displaying the category total.
 
-Here is an example of the output:
+Aquí hay un ejemplo de salida:
 
 ```bash
 *************Food*************
@@ -42,13 +42,13 @@ Transfer to Clothing    -50.00
 Total: 923.96
 ```
 
-Besides the `Category` class, create a function (outside of the class) called `create_spend_chart` that takes a list of categories as an argument. It should return a string that is a bar chart.
+Además de la clase `Category`, crear una función (fuera de la clase) llamada `create_spend_chart` que toma una lista de categorías como argumento. Debe devolver una cadena que es un gráfico de barras.
 
-The chart should show the percentage spent in each category passed in to the function. The percentage spent should be calculated only with withdrawals and not with deposits. Down the left side of the chart should be labels 0 - 100. The "bars" in the bar chart should be made out of the "o" character. The height of each bar should be rounded down to the nearest 10. The horizontal line below the bars should go two spaces past the final bar. Each category name should be written vertically below the bar. There should be a title at the top that says "Percentage spent by category".
+El gráfico debe mostrar el porcentaje gastado en cada categoría pasado a la función. El porcentaje gastado debe calcularse únicamente con retiros y no con depósitos. Debajo del lado izquierdo del gráfico debe estar la etiqueta 0 - 100. Las "barras" en el gráfico de barras deben estar hechas del carácter "o". La altura de cada barra debe ser redondeada hacia abajo al 10 más cercano. La línea horizontal debajo de las barras debe ir dos espacios más allá de la barra final. Cada nombre de categoría debe ser escrito verticalmente debajo de la barra. Debería haber un título en la parte superior que diga "Porcentaje gastado por categoría".
 
-This function will be tested with up to four categories.
+Esta función se probará con hasta cuatro categorías.
 
-Look at the example output below very closely and make sure the spacing of the output matches the example exactly.
+Mire el output del ejemplo a continuación muy de cerca y asegúrese de que el espaciado coincida exactamente con el ejemplo.
 
 ```bash
 Percentage spent by category
@@ -74,23 +74,23 @@ Percentage spent by category
         g     
 ```
 
-The unit tests for this project are in `test_module.py`.
+Las pruebas unitarias para este proyecto están en `test_module.py`.
 
-## Development
+## Desarrollo
 
-Write your code in `budget.py`. For development, you can use `main.py` to test your `Category` class. Click the "run" button and `main.py` will run.
+Escribe tu código en `budget.py`. Para el desarrollo, puedes usar `main.py` para probar tu clase `Category`. Haz clic en el botón "run" y se ejecutará `main.py`.
 
-## Testing 
+## Pruebas
 
-We imported the tests from `test_module.py` to `main.py` for your convenience. The tests will run automatically whenever you hit the "run" button.
+Importamos las pruebas de `test_module.py` a `main.py` para tu comodidad. Las pruebas se ejecutarán automáticamente cada vez que pulses el botón "run".
 
-## Submitting
+## Envío
 
-Copy your project's URL and submit it to freeCodeCamp.
+Copie la URL de su proyecto y envíelo a freeCodeCamp.
 
 # --hints--
 
-It should create a Category class and pass all tests.
+Debes crear una clase de categoría y pasar todas las pruebas.
 
 ```js
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/polygon-area-calculator.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/polygon-area-calculator.md
index 5fcccbd2d4b..106287cb0f8 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/polygon-area-calculator.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/polygon-area-calculator.md
@@ -1,6 +1,6 @@
 ---
 id: 5e444147903586ffb414c94f
-title: Polygon Area Calculator
+title: Calculador de área de polígonos
 challengeType: 10
 forumTopicId: 462363
 dashedName: polygon-area-calculator
@@ -8,20 +8,20 @@ dashedName: polygon-area-calculator
 
 # --description--
 
-You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-polygon-area-calculator" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
+Estarás <a href="https://replit.com/github/freeCodeCamp/boilerplate-polygon-area-calculator" target="_blank" rel="noopener noreferrer nofollow">trabajando en este proyecto con nuestro código inicial en Replit</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 
 # --instructions--
 
-In this project you will use object oriented programming to create a Rectangle class and a Square class. The Square class should be a subclass of Rectangle and inherit methods and attributes.
+En este proyecto usarás programación orientada a objetos para crear una clase Rectangle y una clase Square. La clase Square debe ser una subclase de Rectangle y heredar métodos y atributos.
 
-## Rectangle class
+## Clase Rectángulo
 
-When a Rectangle object is created, it should be initialized with `width` and `height` attributes. The class should also contain the following methods:
+Cuando se crea un objeto Rectangle, debe ser inicializado con los atributos `width` y `height`. La clase debe contener también los siguientes métodos:
 
 - `set_width`
 - `set_height`
@@ -31,17 +31,17 @@ When a Rectangle object is created, it should be initialized with `width` and `h
 - `get_picture`: Returns a string that represents the shape using lines of "\*". The number of lines should be equal to the height and the number of "\*" in each line should be equal to the width. There should be a new line (`\n`) at the end of each line. If the width or height is larger than 50, this should return the string: "Too big for picture.".
 - `get_amount_inside`: Takes another shape (square or rectangle) as an argument. Returns the number of times the passed in shape could fit inside the shape (with no rotations). For instance, a rectangle with a width of 4 and a height of 8 could fit in two squares with sides of 4.
 
-Additionally, if an instance of a Rectangle is represented as a string, it should look like: `Rectangle(width=5, height=10)`
+Además, si una instancia de un Rectángulo se representa como una cadena, debería verse como: `Rectangle(width=5, height=10)`
 
-## Square class
+## Clase Square
 
-The Square class should be a subclass of Rectangle. When a Square object is created, a single side length is passed in. The `__init__` method should store the side length in both the `width` and `height` attributes from the Rectangle class.
+La clase Square debería ser una subclase de Rectangle. Cuando se crea un objeto de Square, se pasa una longitud de un solo lado. El método `__init__` debería almacenar la longitud lateral en ambos atributos `width` y `height` de la clase Rectangle.
 
-The Square class should be able to access the Rectangle class methods but should also contain a `set_side` method. If an instance of a Square is represented as a string, it should look like: `Square(side=9)`
+La clase Square debería ser capaz de acceder a los métodos de la clase Rectangle, pero también debería contener un método `set_side`. Si una instancia de un Square se representa como una cadena, debería verse como: `Square(side=9)`
 
-Additionally, the `set_width` and `set_height` methods on the Square class should set both the width and height.
+Además, los métodos `set_width` y `set_height` en la clase Square deben establecer tanto el ancho como la altura.
 
-## Usage example
+## Ejemplo de uso
 
 ```py
 rect = shape_calculator.Rectangle(10, 5)
@@ -63,7 +63,7 @@ rect.set_width(16)
 print(rect.get_amount_inside(sq))
 ```
 
-That code should return:
+Ese código debería retornar:
 
 ```bash
 50
@@ -84,23 +84,23 @@ Square(side=4)
 8
 ```
 
-The unit tests for this project are in `test_module.py`.
+Las pruebas unitarias para este proyecto están en `test_module.py`.
 
-## Development
+## Desarrollo
 
-Write your code in `shape_calculator.py`. For development, you can use `main.py` to test your `shape_calculator()` function. Click the "run" button and `main.py` will run.
+Escribe tu código en `shape_calculator.py`. Para el desarrollo, puedes usar `main.py` para probar tu función `shape_calculator()`. Haz clic en el botón "run" y se ejecutará `main.py`.
 
-## Testing
+## Pruebas
 
-We imported the tests from `test_module.py` to `main.py` for your convenience. The tests will run automatically whenever you hit the "run" button.
+Importamos las pruebas de `test_module.py` a `main.py` para tu conveniencia. Las pruebas se ejecutarán automáticamente cada vez que pulses el botón "run".
 
-## Submitting
+## Envío
 
-Copy your project's URL and submit it to freeCodeCamp.
+Copia el enlace de tu proyecto y envíalo a freeCodeCamp.
 
 # --hints--
 
-It should create a Rectangle class and Square class and pass all tests.
+Debería crear una clase Rectangle y una clase Square y pasar todas las pruebas.
 
 ```js
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/probability-calculator.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/probability-calculator.md
index 33bb3dd35b9..ca2ab9067ad 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/probability-calculator.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/probability-calculator.md
@@ -1,6 +1,6 @@
 ---
 id: 5e44414f903586ffb414c950
-title: Probability Calculator
+title: Calculadora de probabilidad
 challengeType: 10
 forumTopicId: 462364
 dashedName: probability-calculator
@@ -8,20 +8,20 @@ dashedName: probability-calculator
 
 # --description--
 
-You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-probability-calculator" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
+Estarás <a href="https://replit.com/github/freeCodeCamp/boilerplate-probability-calculator" target="_blank" rel="noopener noreferrer nofollow">trabajando en este proyecto con nuestro código inicial en Replit</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 
 # --instructions--
 
-Suppose there is a hat containing 5 blue balls, 4 red balls, and 2 green balls. What is the probability that a random draw of 4 balls will contain at least 1 red ball and 2 green balls? While it would be possible to calculate the probability using advanced mathematics, an easier way is to write a program to perform a large number of experiments to estimate an approximate probability.
+Supongamos que hay un sombrero que contiene 5 bolas azules, 4 bolas rojas y 2 bolas verdes. ¿Cuál es la probabilidad de que un sorteo aleatorio de 4 bolas contenga al menos 1 bola roja y 2 bolas verdes? Mientras que sería posible calcular la probabilidad usando matemáticas avanzadas, una manera más fácil es escribir un programa para realizar un gran número de experimentos para estimar una probabilidad aproximada.
 
-For this project, you will write a program to determine the approximate probability of drawing certain balls randomly from a hat.
+Para este proyecto, usted escribirá un programa para determinar la probabilidad aproximada de dibujar ciertas bolas al azar de un sombrero.
 
-First, create a `Hat` class in `prob_calculator.py`. The class should take a variable number of arguments that specify the number of balls of each color that are in the hat. For example, a class object could be created in any of these ways:
+Primero, crea una clase `Hat` en `prob_calculator.py`. La clase debe tomar un número variable de argumentos que especifiquen el número de bolas de cada color que están en el sombrero. Por ejemplo, un objeto de clase puede ser creado de cualquiera de estas maneras:
 
 ```py
 hat1 = Hat(yellow=3, blue=2, green=6)
@@ -29,22 +29,22 @@ hat2 = Hat(red=5, orange=4)
 hat3 = Hat(red=5, orange=4, black=1, blue=0, pink=2, striped=9)
 ```
 
-A hat will always be created with at least one ball. The arguments passed into the hat object upon creation should be converted to a `contents` instance variable. `contents` should be a list of strings containing one item for each ball in the hat. Each item in the list should be a color name representing a single ball of that color. For example, if your hat is `{"red": 2, "blue": 1}`, `contents` should be `["red", "red", "blue"]`.
+Siempre se creará un sombrero con al menos una pelota. Los argumentos pasados al objeto sombrero al crear deben ser convertidos a una variable de instancia de `contents`. `contents` debe ser una lista de cadenas que contenga un elemento por cada bola del sombrero. Cada elemento de la lista debe ser un nombre de color que represente una sola bola de ese color. Por ejemplo, si su sombrero es `{"red": 2, "blue": 1}`, `contents` debería ser `["red", "red", "blue"]`.
 
-The `Hat` class should have a `draw` method that accepts an argument indicating the number of balls to draw from the hat. This method should remove balls at random from `contents` and return those balls as a list of strings. The balls should not go back into the hat during the draw, similar to an urn experiment without replacement. If the number of balls to draw exceeds the available quantity, return all the balls.
+La clase `Hat` debe tener un método `draw` que acepte un argumento que indique el número de bolas a sacar del sombrero. Este método debe eliminar bolas al azar de `contents` y devolver esas bolas como una lista de cadenas. Las bolas no deben volver a introducirse en el sombrero durante el sorteo, de forma similar a un experimento de urna sin sustitución. Si el número de bolas a extraer supera la cantidad disponible, devuelve todas las bolas.
 
-Next, create an `experiment` function in `prob_calculator.py` (not inside the `Hat` class). This function should accept the following arguments:
+A continuación, crea una función `experiment` en `prob_calculator.py` (no dentro de la clase `Hat`). Esta función debe aceptar los siguientes argumentos:
 
 - `hat`: A hat object containing balls that should be copied inside the function.
 - `expected_balls`: An object indicating the exact group of balls to attempt to draw from the hat for the experiment. For example, to determine the probability of drawing 2 blue balls and 1 red ball from the hat, set `expected_balls` to `{"blue":2, "red":1}`.
 - `num_balls_drawn`: The number of balls to draw out of the hat in each experiment.
 - `num_experiments`: The number of experiments to perform. (The more experiments performed, the more accurate the approximate probability will be.)
 
-The `experiment` function should return a probability.
+La función `experiment` debe devolver una probabilidad.
 
-For example, if you want to determine the probability of getting at least two red balls and one green ball when you draw five balls from a hat containing six black, four red, and three green. To do this, you will perform `N` experiments, count how many times `M` you get at least two red balls and one green ball, and estimate the probability as `M/N`. Each experiment consists of starting with a hat containing the specified balls, drawing several balls, and checking if you got the balls you were attempting to draw.
+Por ejemplo, digamos que quieres determinar la probabilidad de obtener al menos 2 bolas rojas y 1 bola verde cuando dibujas 5 bolas de un sombrero que contiene 6 negras, 4 rojos y 3 verdes. Para hacer esto, realizarás `N` experimentos, contarás cuantas `M` veces obtienes al menos 2 bolas rojas y 1 bola verde, y estimarás la probabilidad como `M/N`. Cada experimento consiste en comenzar con un sombrero que contiene las bolas especificadas, dibujar una serie de bolas, y comprobar si conseguimos las bolas que estábamos tratando de dibujar.
 
-Here is how you would call the `experiment` function based on the example above with 2000 experiments:
+Así es como se llamaría la función de `experiment` basada en el ejemplo anterior con 2000 experimentos:
 
 ```py
 hat = Hat(black=6, red=4, green=3)
@@ -54,27 +54,27 @@ probability = experiment(hat=hat,
                   num_experiments=2000)
 ```
 
-Since this is based on random draws, the probability will be slightly different each time the code is run.
+Dado que esto se basa en tablas aleatorias, la probabilidad será ligeramente diferente cada vez que se ejecuta el código.
 
-*Hint: Consider using the modules that are already imported at the top of `prob_calculator.py`. Do not initialize random seed within `prob_calculator.py`.*
+*Sugerencia: Considere usar los módulos que ya se importan en la parte superior de `prob_calculator.py`. No inicialice semilla aleatoria dentro de `prob_calculator.py`.*
 
-## Development
+## Desarrollo
 
-Write your code in `prob_calculator.py`. For development, you can use `main.py` to test your code. Click the "run" button and `main.py` will run.
+Escribe tu código en `prob_calculator.py` Para el desarrollo, puedes usar `main.py` para probar tu código. Haz clic en el botón "run" y se ejecutará `main.py`.
 
-The boilerplate includes `import` statements for the `copy` and `random` modules. Consider using those in your project.
+La placa utiliza la declaración `import` para importar los módulos `copy` y `random`. Considere el uso de estos en su proyecto.
 
-## Testing
+## Pruebas
 
-The unit tests for this project are in `test_module.py`. We imported the tests from `test_module.py` to `main.py` for your convenience. The tests will run automatically whenever you hit the "run" button.
+Las pruebas unitarias para este proyecto están en `test_module.py`. Hemos importado las pruebas de `test_module.py` a `main.py` para tu conveniencia. Las pruebas se ejecutarán automaticamente cada vez que presione el botón de "run".
 
-## Submitting
+## Envío
 
-Copy your project's URL and submit it to freeCodeCamp.
+Copia la URL de tu proyecto y envíalo a freeCodeCamp.
 
 # --hints--
 
-It should correctly calculate probabilities and pass all tests.
+Debe calcular correctamente las probabilidades y pasar todas las pruebas.
 
 ```js
 
diff --git a/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/time-calculator.md b/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/time-calculator.md
index 015b9e343f4..6169920e39c 100644
--- a/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/time-calculator.md
+++ b/curriculum/challenges/espanol/07-scientific-computing-with-python/scientific-computing-with-python-projects/time-calculator.md
@@ -1,6 +1,6 @@
 ---
 id: 5e444136903586ffb414c94d
-title: Time Calculator
+title: Calculadora de tiempo
 challengeType: 10
 forumTopicId: 462360
 dashedName: time-calculator
@@ -8,27 +8,27 @@ dashedName: time-calculator
 
 # --description--
 
-You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-time-calculator" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>. 
+Estarás <a href="https://replit.com/github/freeCodeCamp/boilerplate-time-calculator" target="_blank" rel="noopener noreferrer nofollow">trabajando en este proyecto con nuestro código inicial en Replit</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 # --instructions--
 
-Write a function named `add_time` that takes in two required parameters and one optional parameter:
+Escribe una función llamada `add_time` que tome dos parámetros requeridos y un parámetro opcional:
 
 - a start time in the 12-hour clock format (ending in AM or PM)
 - a duration time that indicates the number of hours and minutes
 - (optional) a starting day of the week, case insensitive
 
-The function should add the duration time to the start time and return the result.
+La función debe agregar la duración a la hora de inicio y devolver el resultado.
 
-If the result will be the next day, it should show `(next day)` after the time. If the result will be more than one day later, it should show `(n days later)` after the time, where "n" is the number of days later.
+Si el resultado es el día siguiente, debería mostrar `(next day)` después de la hora. Si el resultado es más de un día después, debería mostrar `(n days later)` después del tiempo, donde "n" es el número de días más tarde.
 
-If the function is given the optional starting day of the week parameter, then the output should display the day of the week of the result. The day of the week in the output should appear after the time and before the number of days later.
+Si a la función se le da el parámetro opcional de día de la semana, entonces la salida debe mostrar el día de la semana del resultado. El día de la semana en la salida debe aparecer después de la hora y antes del número de días después.
 
-Below are some examples of different cases the function should handle. Pay close attention to the spacing and punctuation of the results.
+A continuación se muestran algunos ejemplos de casos diferentes que la función debe manejar. Preste atención a los espacios y la puntuación de los resultados.
 
 ```py
 add_time("3:00 PM", "3:10")
@@ -50,23 +50,23 @@ add_time("6:30 PM", "205:12")
 # Returns: 7:42 AM (9 days later)
 ```
 
-Do not import any Python libraries. Assume that the start times are valid times. The minutes in the duration time will be a whole number less than 60, but the hour can be any whole number.
+No importes ninguna librería Python. Asume que las horas de inicio son horas válidas. Los minutos en el tiempo de duración serán un número entero inferior a 60, pero la hora puede ser cualquier número entero.
 
-## Development
+## Desarrollo
 
-Write your code in `time_calculator.py`. For development, you can use `main.py` to test your `time_calculator()` function. Click the "run" button and `main.py` will run.
+Escribe tu código en `time_calculator.py`. Para el desarrollo, puedes usar `main.py` para probar tu función `time_calculator()`. Haz clic en el botón "run" y se ejecutará `main.py`.
 
-## Testing
+## Pruebas
 
-The unit tests for this project are in `test_module.py`. We imported the tests from `test_module.py` to `main.py` for your convenience. The tests will run automatically whenever you hit the "run" button.
+Las pruebas unitarias para este proyecto están en `test_module.py`. Importamos las pruebas de `test_module.py` a `main.py` para tu comodidad. Las pruebas se ejecutarán automáticamente cada vez que presiones el botón "run".
 
-## Submitting
+## Envío
 
-Copy your project's URL and submit it to freeCodeCamp.
+Copia el URL de tu proyecto y envíalo a freeCodeCamp.
 
 # --hints--
 
-It should correctly add times and pass all tests.
+Debe calcular correctamente las probabilidades y pasar todas las pruebas.
 
 ```js
 
diff --git a/curriculum/challenges/espanol/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md b/curriculum/challenges/espanol/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
index 42db0dbed63..f13e5d00189 100644
--- a/curriculum/challenges/espanol/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
+++ b/curriculum/challenges/espanol/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
@@ -13,16 +13,12 @@ Lastly change the text color of the `terms and conditions` link element to `#dfd
 
 # --hints--
 
-Debes usar un selector de elementos `a`.
-
-```js
-assert.exists(new __helpers.CSSHelp(document).getStyle('a'));
-```
 
 Debes de dar al elemento `a` un `color` de `#dfdfe2`.
 
 ```js
-assert.equal(new __helpers.CSSHelp(document).getStyle('a')?.color, 'rgb(223, 223, 226)');
+const linkElement = document.querySelector("a");
+assert.equal(window.getComputedStyle(linkElement)?.color, 'rgb(223, 223, 226)');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
index 8e5afaf1f3e..f83b3be0bc3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
@@ -10,11 +10,9 @@ dashedName: build-a-cash-register
 
 Here you'll build a cash register app that will return change to the customer based on the price of the item, the amount of cash provided by the customer, and the amount of cash in the cash drawer. You'll also need to show different messages to the user in different scenarios, such as when the customer provides too little cash or when the cash drawer doesn't have enough to issue the correct change.
 
-There are a few variables you'll need to use in your code:
+In the `script.js` file, you have been provided with the `price` and `cid` variables. The `price` variable is the price of the item, and the `cid` variable is the cash-in-drawer, which is a 2D array listing the available currency in the cash drawer.
 
-- `price`: el precio del artículo como un número de punto flotante.
-- `cash`: el monto de dinero proporcionado por el cliente para el artículo, que se proporciona a través de un elemento `input` dentro de la página.
-- `cid`: cajón de efectivo, un arreglo 2D listando las monedas disponibles en el efectivo.
+The other variable you will need add is the `cash` variable, which is the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
 
 If you'd like to test your application with different values for `price` and `cid`, make sure to declare them with the `let` keyword so they can be reassigned by our tests.
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
index fe6f43c6855..94c0f6cce14 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
@@ -28,10 +28,10 @@ In this project, you'll build an app that will search for Pokémon by name or ID
 1. You should have an element with an `id` of `special-defense`
 1. You should have an element with an `id` of `speed`
 1. When the `#search-input` element contains the value `Red` and the `#search-button` element is clicked, an alert should appear with the text `Pokémon not found`
-1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
+1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the `#types` element should contain a single inner element with the value `ELECTRIC`. The `#types` element content should be cleared between searches
-1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
+1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed`elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the `#types` element should contain two inner elements with the text values `GHOST` and `POISON`, respectively. The `#types` element content should be cleared between searches
 
@@ -158,7 +158,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
+When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
 
 ```js
 async () => {
@@ -251,7 +251,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
+When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
 
 ```js
 async () => {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
index 9f5fa943828..e6a91bf3f12 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
@@ -11,7 +11,7 @@ Now that you have the value of the input, you need to split it into an array of
 
 The `.split()` method takes a string and splits it into an array of strings. You can pass it a string of characters or a RegEx to use as a separator. For example, `string.split(",")` would split the string at each comma and return an array of strings.
 
-Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces seperating your values. Store the array in an `array` variable.
+Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces separating your values. Store the array in an `array` variable.
 
 # --hints--
 
@@ -36,7 +36,7 @@ assert.match(code.toString(),  /array\s*=\s*value\.split()/);
 You should use `/,\s*/g` for the `split()` method's separator.
 
 ```js
-assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\)/);
+assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
index edb31f14bd0..2968c316732 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
@@ -22,7 +22,7 @@ assert.match(calculate.toString(), /numbers/);
 You should use the `.map()` method on your `array` variable.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\)/);
+assert.match(calculate.toString(), /array\.map\(\s*\)/);
 ```
 
 You should assign the result of your `.map()` call to your `numbers` variable.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
index 561fb306a69..95837e6a64e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
@@ -24,7 +24,7 @@ Add a callback function to your `.map()` method that converts each element to a
 Your `.map()` method should have a callback function which takes an `el` parameter.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use the `Number` constructor to convert `el` to a number.
@@ -42,7 +42,7 @@ assert.notMatch(calculate.toString(), /new/);
 Your callback function should return the element converted to a number.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
index 9a0e02d7952..11ddcee767b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
@@ -24,13 +24,13 @@ assert.match(calculate.toString(), /filtered/);
 Your `calculate` function should use the `.filter()` method on the `numbers` array.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\)/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*\)/)
 ```
 
 You should assign the result of `numbers.filter()` to the `filtered` variable.
 
 ```js
-assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\)/);
+assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
index 77468890aa4..576150a66c9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
@@ -26,7 +26,7 @@ Add a callback function to your `.filter()` method that returns `true` if the el
 Your `.filter()` method should have a callback which accepts `el` as a parameter.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use `!` and `isNaN()` to check if `el` is NOT `NaN`.
@@ -38,7 +38,7 @@ assert.match(calculate.toString(), /!\s*(Number\.)?isNaN\(\s*el\s*\)/);
 Your callback function should return elements that are not `NaN`.
 
 ```js
-assert.match(calculate.toString(), /(numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
index 0785e708d83..6d54faa1c18 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
@@ -28,20 +28,19 @@ assert.notMatch(calculate.toString(), /filtered/);
 You should chain your `.filter()` call to your `.map()` call.
 
 ```js
-console.log(calculate.toString());
 assert.match(calculate.toString(), /array\.map\(.*\)\.filter\(/s);
 ```
 
 You should not remove the `.map()` callback.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 You should not remove the `.filter()` callback.
 
 ```js
-assert.match(calculate.toString(), /(\.filter\(\(?\s*el\s*\)?\s*=>|\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
+assert.match(calculate.toString(), /(\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
index ad2afe46cf1..9fa0b6c2446 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
@@ -22,13 +22,13 @@ assert.match(getMean.toString(), /sum/);
 Your `getMean` function should use the `.reduce()` method of the `array` parameter.
 
 ```js
-assert.match(getMean.toString(), /array\.reduce\(\)/);
+assert.match(getMean.toString(), /array\.reduce\(\s*\)/);
 ```
 
 You should assign the result of `array.reduce()` to the `sum` variable.
 
 ```js
-assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\)/);
+assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
index ed0f64bee64..b185d6010b5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
@@ -22,13 +22,13 @@ For your `sum` variable, pass a callback to `.reduce()` that takes the accumulat
 Your `reduce` method should have a callback function which takes an `acc` and an `el` parameters.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)/)
 ```
 
 Your `reduce` method should return the sum of `acc` and `el`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
index a5903b35465..d0bc5e0ac5a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
@@ -22,7 +22,7 @@ Set the initial value of the accumulator to `0`.
 Your `reduce` method should have `0` as the initial value.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
index cd59f7940d9..ae068f20084 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
@@ -28,19 +28,19 @@ assert.notMatch(getMean.toString(), /mean\s*=/);
 You should not change the logic within the `reduce` method.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 You should divide the result of the `reduce` method by the length of the array.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)\s*\/\s*array\.length/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 You should use implicit return syntax to directly return the result of `reduce` divided by the array length.
 
 ```js
-assert.match(code, /const\s+getMean\s*=\s*\(?array\)?\s*=>\s*array\.reduce\(\(acc\s*,\s*el\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
+assert.match(code, /const\s+getMean\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
index 596454971f3..eca59162cf2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
@@ -18,13 +18,13 @@ To sort your numbers from smallest to largest, pass a callback function that tak
 Your `sort` method should have a callback function which takes an `a` and a `b` parameters.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)/)
 ```
 
 Your `sort` method should return the result of subtracting `b` from `a`.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
index 5740eaedf3e..eb6f0e6d32c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
@@ -34,13 +34,13 @@ assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0
 If `array.length` is even, pass an array with the two middle numbers from the `sorted` array to the `getMean` function. The first item in the array argument should be the value at index `array.length / 2` from `sorted` and the second should use the value at the index `array.length / 2 - 1` from `sorted`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:/);
 ```
 
 If the `array.length` is odd, your `median` variable should assign the middle number to the `median` variable. The middle number is the value of `sorted` at `Math.floor(array.length / 2)`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:\s*sorted\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\)\];/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:\s*sorted\s*\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\s*\)\s*\]\s*;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
index 6d694436e76..bc279dfd9b4 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
@@ -22,13 +22,13 @@ assert.match(calculate.toString(), /median\s*=/);
 Your `median` variable should be assigned the value of `getMedian(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /median\s*=\s*getMedian\(numbers\)/);
+assert.match(calculate.toString(), /median\s*=\s*getMedian\(\s*numbers\s*\)/);
 ```
 
 Your `calculate` function should query the DOM for the `#median` element and set the `textContent` to `median`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#median\1\)\.textContent\s*=\s*median/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#median\1\s*\)\.textContent\s*=\s*median/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
index 73d49b9597a..906ec8e17a7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
@@ -22,14 +22,13 @@ assert.match(getMode.toString(), /array\.forEach\(/);
 Your `.forEach()` method should have a callback function which takes an `el` parameter.
 
 ```js
-console.log(getMode.toString());
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)/);
 ```
 
 Your `.forEach()` method should increment the count for each number. Don't forget the fallback value.
 
 ```js
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)\s*\{?\s*(return)?\s*counts\[\s*el\s*\]\s*=\s*\(\s*counts\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)\s*\{?\s*(return)?\s*counts\s*\[\s*el\s*\]\s*=\s*\(\s*counts\s*\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
index 2f2a2ee1553..75f6c9178ac 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
@@ -24,19 +24,19 @@ assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.so
 Your `getMode` function should pass a callback to the `sort` method with parameters `a` and `b`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)/)
 ```
 
 Your `getMode` function should use the `sort` method to sort the `Object.keys()` array and return the value of `counts[b]` minus the value of `counts[a]`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)/)
 ```
 
 Your `highest` variable should have the value of the first entry in the sorted `Object.keys(counts)` array.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)\[0\];/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)\s*\[\s*0\s*\]\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
index 492f74f08a6..680d3c17a71 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
@@ -20,13 +20,13 @@ assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filte
 Your `.filter()` method should take a callback function with a parameter `el`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)/);
 ```
 
 Your `.filter()` method should return whether the value of `counts[el]` is equal to `counts[highest]`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\[\s*el\s*\]\s*===\s*counts\[\s*highest\s*\];\s*\}/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\s*\[\s*el\s*\]\s*===\s*counts\s*\[\s*highest\s*\]\s*;\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
index 86eb94fefb6..74f2f41b21d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /mode\s*=\s*getMode\(\s*numbers\s*\);/);
 Your `calculate` function should query the DOM for the `#mode` element and set the `textContent` to `mode`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#mode\1\)\.textContent\s*=\s*mode;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#mode\1\s*\)\.textContent\s*=\s*mode;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
index 3cde887a62c..28ab9e5c0d2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
@@ -12,7 +12,10 @@ Your next calculation is the <dfn>range</dfn>, which is the difference between t
 You previously learned about the global `Math` object. `Math` has a `.min()` method to get the smallest number from a series of numbers, and the `.max()` method to get the largest number. Here's an example that gets the smallest number from an array:
 
 ```js
-Math.min(1, 9, 11, -3, 0.5);
+const numbersArr = [2, 3, 1];
+
+console.log(Math.min(...numbersArr));
+// Expected output: 1
 ```
 
 Declare a `getRange` function that takes the same `array` parameter you have been using. Using `Math.min()`, `Math.max()`, and the spread operator, return the difference between the largest and smallest numbers in the list.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
index f2dc4a4c0b6..a664f56c16a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
@@ -14,13 +14,13 @@ Add the logic for calculating and displaying the range to your `calculate` funct
 Your `calculate` function should set a `range` variable to the result of `getRange(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /range\s*=\s*getRange\(numbers\);/);
+assert.match(calculate.toString(), /range\s*=\s*getRange\(\s*numbers\s*\);/);
 ```
 
 Your `calculate` function should set the `#range` element's `textContent` to the `range` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#range\1\)\.textContent\s*=\s*range;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#range\1\s*\)\.textContent\s*=\s*range;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
index 72b150d1d82..b9c55b63753 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
@@ -26,13 +26,13 @@ assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(/);
 Your `differences` variable should use the `el` parameter in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Your `map` callback should return the value of `el` minus `mean`.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
index 40add45f7ca..d785a927a6f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
@@ -28,13 +28,13 @@ assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\
 Your `squaredDifferences` variable should use the `el` parameter in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Your `map` callback should return the value of `el` squared.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
 ```
 
 Your `map` callback should use the `**` operator.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
index 16394cf8188..fe84344a437 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
@@ -28,14 +28,13 @@ assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDiffere
 Your `sumSquaredDifferences` variable should use the `acc` and `el` parameters in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Your `reduce` callback should return the sum of `acc` and `el`.
 
 ```js
-console.log(getVariance.toString());
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
index f0c3ed19337..c2d7ab1064f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
@@ -46,19 +46,19 @@ assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(/);
 Your `variance` variable should use the `acc` and `el` parameters in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Your `reduce` callback should be an empty function.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}/);
 ```
 
 Your `reduce` callback should have an initial value of `0`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}\s*,\s*0\s*\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
index 1dbe404744f..5e0e6c6e8bf 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
@@ -14,37 +14,37 @@ Within your empty `.reduce()` callback, declare a variable `difference` and set
 Your `reduce` callback should have a `difference` variable.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=/);
 ```
 
 Your `difference` variable should be set to the value of `el` minus `mean`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
 ```
 
 Your `reduce` callback should have a `squared` variable.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
 ```
 
 Your `squared` variable should be set to the value of `difference` to the power of 2.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
 ```
 
 Your `reduce` callback should return the value of `acc` plus `squared`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
 ```
 
 You should not remove the initial value of `0` from your `.reduce()` method.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
index 580046fee64..12c9b4e81b5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
@@ -16,7 +16,7 @@ Divide your `.reduce()` call by the length of the array (in your `variance` decl
 You should divide the result of the `.reduce()` call by the length of the array.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)\s*\/\s*array\.length;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)\s*\/\s*array\.length;/);
 ```
 
 You should return the value of `variance`.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
index 3f5871d4a90..48451ea6c2d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /variance\s*=\s*getVariance\(\s*numbers\s*\)/
 You should set the `textContent` of the `#variance` element to the value of the `variance` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#variance\1\)\.textContent\s*=\s*variance/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#variance\1\s*\)\.textContent\s*=\s*variance/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
index 85903a1d4d3..1567fe0186f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
@@ -14,13 +14,13 @@ Now update the `calculate` function to include the standard deviation logic, lik
 Your `calculate` function should have a `standardDeviation` variable set to the result of `getStandardDeviation(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(numbers\)/);
+assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(\s*numbers\s*\)/);
 ```
 
 You should update the `textContent` of the `#standardDeviation` element to be the `standardDeviation` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#standardDeviation\1\)\.textContent\s*=\s*standardDeviation/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#standardDeviation\1\s*\)\.textContent\s*=\s*standardDeviation/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
index 953a89f7dc1..9f4f2778ade 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
@@ -16,19 +16,19 @@ To fix this, add an empty `.slice()` call before your `.sort()` method. The empt
 You should call `.slice()` on the `array` parameter.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)/);
 ```
 
 Your `.sort()` call should be chained to the `.slice()` call.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(/);
 ```
 
 You should not modify the `.sort()` method callback.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
index d6bf640da3d..0dbe9bccf46 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
@@ -24,7 +24,7 @@ Use the `async` keyword to create an asynchronous arrow function called `fetchDa
 You should use the `async` keyword to create an asynchronous arrow function called `fetchData`.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*[^}]*\s*}/);
 ```
 
 `fetchData` should be defined.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
index c8b7a7bdd5b..eba98f8122f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
@@ -37,7 +37,7 @@ assert.match(code, /\s*const\s+res\s*=\s*await\s+fetch\(\s*(.*)\s*\)/);
 You should pass in the `forumLatest` constant to the `fetch` call.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
index 87c64ac1ace..c535ff7cf59 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+data/);
 You should assign `await res.json()` to the `data` variable.
 
 ```js
-assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\);?\s*/);
+assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
index 26004a6fb3c..396591c912c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
@@ -28,7 +28,7 @@ assert.match(code, /\s*try\s*{[\s\S]*\s*console\.log\(\s*data\s*\)[\s\S]*}\s*cat
 You should call the `fetchData()` function, after the `fetchData()` function is defined.
 
 ```js
-assert.match(code, /};?\s*fetchData\(\)/);
+assert.match(code, /};?\s*fetchData\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
index 010d1eed964..8d1a6248eb6 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
@@ -22,7 +22,7 @@ assert.match(code, /\s*showLatestPosts\(.*\);??\s*/);
 You should pass `data` as the argument to `showLatestsPosts()`.
 
 ```js
-assert.match(code, /\s*showLatestPosts\(data\);?\s*/);
+assert.match(code, /\s*showLatestPosts\(\s*data\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
index 83f164a3084..8c4373d745f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
@@ -20,7 +20,7 @@ assert.match(code, /\s*const\s+thousands\s*=/);
 Your should assign `Math.floor(views / 1000)` to your `thousands` variable.
 
 ```js
-assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(views\s*\/\s*1000\)\s*/);
+assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(\s*views\s*\/\s*1000\s*\)\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
index 629b0cb7ffe..ebc75097659 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
@@ -14,7 +14,7 @@ Inside the `if` statement, destructure `className` and `category` from the `allC
 You should destructure `className` and `category` from the `allCategories[id]` object. The properties can be in any order.
 
 ```js
-assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\[id\]\s*/g));
+assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\s*\[\s*id\s*\]\s*/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
index 7557ad1f799..114142255b6 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
@@ -27,19 +27,19 @@ Inside your `fetchData` function, add a `try...catch` statement. The `catch` blo
 You should have a `try` block inside your `fetchData` function.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
 ```
 
 You should have a `catch` block after your `try` block.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
 ```
 
 Your `catch` block should have an `err` parameter.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
 ```
 
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
index 1ffbe2173f7..ba26f4a7419 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+postsContainer\s*=/);
 You should use `document.getElementById()` to get the `#posts-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)posts-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/);
 ```
 
 You should assign the `#posts-container` element to your `postsContainer` variable.
 
 ```js
-assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(('|"|`)posts-container\1\)/g));
+assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
index 696a11ddbf4..e5af69a01c3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
@@ -14,7 +14,7 @@ You will be using this as an event listener for the `sortButton`. Because button
 Your `sortInputArray` function should call `event.preventDefault()`.
 
 ```js
-assert.match(sortInputArray.toString(), /event\.preventDefault\(\)/);
+assert.match(sortInputArray.toString(), /event\.preventDefault\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
index c8d16d85bd1..418ea0c9da6 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*
 You should assign `temp` the value of `array[j]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?/);
 ```
 
 You should assign `array[j]` the value of `array[j + 1]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?/);
 ```
 
 You should assign `array[j + 1]` the value of `temp`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
index d5d1679818f..a2ed1758b1c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished executing, return the sorted array.
 You should `return` the `array` variable.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
index bd97f2feed7..26e90316734 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
@@ -17,7 +17,7 @@ You should remove your `console.log()` call.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(bubbleSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(bubbleSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
index 1c192cb9552..7db7f8a3310 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{
 You should assign `array[i]` to `temp`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]/)
 ```
 
 You should assign `array[minIndex]` to `array[i]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]/)
 ```
 
 You should assign `temp` to `array[minIndex]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
index 9707a20265d..714689de728 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished, you need to return the array. Once
 You should `return` the `array` after your outer loop completes.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
index 0761cbbbf87..d35ec939d2a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
@@ -15,7 +15,7 @@ You should remove the `console.log()` statement from `selectionSort()`.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(selectionSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(selectionSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
index fe8c0cd2c97..ef9b815c024 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
@@ -16,7 +16,7 @@ Do so by assigning the value at the `j` index to the next index.
 Before decrementing `j`, assign the value at `j` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
index 3415ac51f40..61e07121df4 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
@@ -16,7 +16,7 @@ Use the assignment operator to insert your current value into the correct index.
 You should assign `currValue` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
+assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
index 5b301f03774..8ad2de46ecc 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
@@ -14,7 +14,7 @@ After your `for` loop has finished, you need to return the array. You should the
 You should `return` the `array`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
index e70ac7a071a..f5e1f2c2d96 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
@@ -11,7 +11,7 @@ One of the most powerful tools is your developer console. Depending on your brow
 
 The developer console will include errors that are produced by your code, but you can also use it to see values of variables in your code, which is helpful for debugging.
 
-Add a `console.log("Hello World");` line between your `script` tags. Then click the "Console" button to open the console. You should see the text `Hello World`.
+Add a `console.log("Hello World");` line between your `script` tags. Then click the "Console" button to open the console. You should see the text `"Hello World"`.
 
 Note how the line ends with a semi-colon. It is common practice in JavaScript to end your code lines with semi-colons.
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
index cefef5f091d..a2080e53f5e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
@@ -10,10 +10,10 @@ dashedName: step-7
 Variables can be <dfn>assigned</dfn> a value. When you do this while you declare it, this is called <dfn>initialization</dfn>. For example:
 
 ```js
-let camperbot = "Bot";
+let age = 32;
 ```
 
-This would initialize the `camperbot` variable with a value of `Bot`, a string.
+This would initialize the `age` variable with a value of `32`, a number.
 
 Initialize your `xp` variable to have a value of `0`, a number.
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
index eda38150a27..0ac364aee95 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
@@ -15,7 +15,7 @@ let order = ["first", "second", "third"];
 
 This is an array which holds three values. Notice how the values are separated by commas.
 
-Change your `inventory` variable to be an array with the strings `stick`, `dagger`, and `sword`.
+Change your `inventory` variable to be an array with the strings `"stick"`, `"dagger"`, and `"sword"`.
 
 # --hints--
 
@@ -31,19 +31,19 @@ Your `inventory` variable should have three values.
 assert.lengthOf(inventory, 3);
 ```
 
-Your `inventory` variable should include the string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
 ```
 
-Your `inventory` variable should include the string `dagger`.
+Your `inventory` variable should include the string `"dagger"`.
 
 ```js
 assert.include(inventory, "dagger");
 ```
 
-Your `inventory` variable should include the string `sword`.
+Your `inventory` variable should include the string `"sword"`.
 
 ```js
 assert.include(inventory, "sword");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
index 42a72c4caab..3ba5bc54ced 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-For now, you want the player to start with just the `stick`. Change the `inventory` array to have `stick` as its only value.
+For now, you want the player to start with just the `"stick"`. Change the `inventory` array to have `"stick"` as its only value.
 
 # --hints--
 
@@ -23,7 +23,7 @@ Your `inventory` variable should only have one value.
 assert.lengthOf(inventory, 1);
 ```
 
-Your `inventory` variable should include the string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
index c09c8582a1d..6b115aa59a6 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
@@ -33,10 +33,10 @@ You should use `document.querySelector()`.
 assert.match(code, /document\.querySelector/);
 ```
 
-You should use the `#button1` selector.
+You should use the `"#button1"` selector.
 
 ```js
-assert.match(code, /querySelector\(('|")#button1\1\)/);
+assert.match(code, /querySelector\(\s*('|")#button1\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
index 41c6118d22a..dcf28c86c3f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
@@ -9,12 +9,14 @@ dashedName: step-40
 
 `button1` represents your first `button` element. These elements have a special property called `onclick`, which you can use to determine what happens when someone clicks that button.
 
-You can access properties in JavaScript a couple of different ways. The first is with <dfn>dot notation</dfn>. Accessing the `onclick` property of a button would look like:
+You can access properties in JavaScript a couple of different ways. The first is with <dfn>dot notation</dfn>. Here is an example of using dot notation to set the `onclick` property of a button to a function reference.
 
 ```js
-button.onclick
+button.onclick = myFunction;
 ```
 
+In this example, `button` is the button element, and `myFunction` is a reference to a function. When the button is clicked, `myFunction` will be called.
+
 Use dot notation to set the `onclick` property of your `button1` to the function reference of `goStore`. Note that `button1` is already declared, so you don't need to use `let` or `const`.
 
 # --hints--
@@ -31,10 +33,10 @@ You should not use `let` or `const`.
 assert.notMatch(code, /(let|const)\s+button1\.onclick/);
 ```
 
-You should assign the `goStore` function reference to `button1.onclick`.
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button1\.onclick\s*=\s*goStore/);
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
index 39ca72edadf..76505cede79 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
@@ -13,6 +13,12 @@ Once you have done that, open your console and try clicking the buttons on your
 
 # --hints--
 
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
+
+```js
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
+```
+
 You should use dot notation to access the `onclick` property of `button2`.
 
 ```js
@@ -25,10 +31,10 @@ You should not use `let` or `const` to assign `button2.onclick`.
 assert.notMatch(code, /(let|const)\s+button2\.onclick/);
 ```
 
-You should set the `onclick` property of `button2` to the variable `goCave`.
+You should assign the `goCave` function reference to `button2.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button2\.onclick\s*=\s*goCave/);
+assert.match(code, /button2\.onclick\s*=\s*goCave\s*;?\s*$/m);
 ```
 
 You should use dot notation to access the `onclick` property of `button3`.
@@ -43,10 +49,10 @@ You should not use `let` or `const` to assign `button3.onclick`.
 assert.notMatch(code, /(let|const)\s+button3\.onclick/);
 ```
 
-You should set the `onclick` property of `button3` to the variable `fightDragon`.
+You should assign the `fightDragon` function reference to `button3.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button3\.onclick\s*=\s*fightDragon/);
+assert.match(code, /button3\.onclick\s*=\s*fightDragon\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
index 1f38b5d5c51..e30801f1901 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-For now, make your `goStore` function output the message `Going to store.` to the console. For example, here is a function that outputs the message `Hello World`.
+For now, make your `goStore` function output the message `"Going to store."` to the console. For example, here is a function that outputs the message `"Hello World"`.
 
 ```js
 function functionName() {
@@ -20,13 +20,13 @@ function functionName() {
 You should have a `console.log("Going to store.");` line in your code. Don't forget the semi-colon.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to store\.\1\);/);
+assert.match(code, /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 Your `console.log("Going to store.");` line should be in your `goStore` function.
 
 ```js
-assert.match(goStore.toString(), /console\.log\(('|")Going to store\.\1\);/);
+assert.match(goStore.toString(), /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
index 1479881b695..69f217e57c2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
@@ -7,7 +7,7 @@ dashedName: step-37
 
 # --description--
 
-Now create a `goCave` function that prints `Going to cave.` to the console.
+Now create a `goCave` function that prints `"Going to cave."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(goCave);
 You should have a `console.log("Going to cave.");` line in your code.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 Your `console.log("Going to cave.");` line should be inside your `goCave` function.
 
 ```js
-assert.match(goCave.toString(), /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(goCave.toString(), /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
index 3453bd5513c..0b14b0e83c2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
@@ -7,7 +7,7 @@ dashedName: step-38
 
 # --description--
 
-Now create a `fightDragon` function that prints `Fighting dragon.` to the console.
+Now create a `fightDragon` function that prints `"Fighting dragon."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(fightDragon);
 You should have a `console.log("Fighting dragon.");` line in your code.
 
 ```js
-assert.match(code, /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 Your `console.log("Fighting dragon.");` line should be inside your `fightDragon` function.
 
 ```js
-assert.match(fightDragon.toString(), /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(fightDragon.toString(), /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
index 517f2c10b91..29178127406 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
@@ -9,21 +9,25 @@ dashedName: step-42
 
 The `innerText` property controls the text that appears in an HTML element. For example:
 
-```js
-const info = document.querySelector("#info");
-info.innerText = "Hello World";
+```html
+<p id="info">Demo content</p> 
 ```
 
-This code would change the element assigned to the `info` variable to have the text `Hello World`.
+```js
+const info = document.querySelector("#info"); 
+info.innerText = "Hello World"; 
+```
 
-When a player clicks your `Go to store` button, you want to change the buttons and text. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `Buy 10 health (10 gold)`.
+The following example would change the text of the `p` element from `Demo content` to `Hello World`.
+
+When a player clicks your `Go to store` button, you want to change the buttons and text. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `"Buy 10 health (10 gold)"`.
 
 # --hints--
 
 You should not have a `console.log("Going to store.");` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(('|")Going to store\.\1\)/);
+assert.notMatch(code, /console\.log\(\s*('|")Going to store\.\1\s*\)/);
 ```
 
 You should use dot notation to access the `innerText` property of `button1`.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
index a2fd5551a32..539f1134dbd 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, add a line that updates the text of `button2` to say `Buy weapon (30 gold)` and update the text of `button3` to say `Go to town square`.
+Now, add a line that updates the text of `button2` to say `"Buy weapon (30 gold)"` and update the text of `button3` to say `"Go to town square"`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button2\.innerText/);
 ```
 
-You should update the `innerText` property of `button2` to be `Buy weapon (30 gold)`.
+You should update the `innerText` property of `button2` to be `"Buy weapon (30 gold)"`.
 
 ```js
 assert.match(code, /button2\.innerText\s*=\s*('|")Buy weapon \(30 gold\)\1/);
@@ -47,7 +47,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button3\.innerText/);
 ```
 
-You should update the `innerText` property of `button3` to be `Go to town square`.
+You should update the `innerText` property of `button3` to be `"Go to town square"`.
 
 ```js
 assert.match(code, /button3\.innerText\s*=\s*('|")Go to town square\1/);
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
index 83a5974014e..50986c53aca 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Now you need to modify your display text. Change the `innerText` property of the `text` to be `You enter the store.`.
+Now you need to modify your display text. Change the `innerText` property of the `text` to be `"You enter the store."`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `text`
 assert.notMatch(code, /(let|const)\s+text\.innerText/);
 ```
 
-You should update the `innerText` property of `text` to be `You enter the store.`.
+You should update the `innerText` property of `text` to be `"You enter the store."`.
 
 ```js
 assert.match(code, /text\.innerText\s*=\s*('|")You enter the store.\1/);
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
index abbb72ebb0d..f665617c07a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
@@ -7,25 +7,25 @@ dashedName: step-48
 
 # --description--
 
-In your `goTown` function, change your `button` elements' `innerText` properties to be `Go to store`, `Go to cave`, and `Fight dragon`. Update your `onclick` properties to be `goStore`, `goCave`, and `fightDragon`, respectively.
+In your `goTown` function, change your `button` elements' `innerText` properties to be `"Go to store"`, `"Go to cave"`, and `"Fight dragon"`. Update your `onclick` properties to be `goStore`, `goCave`, and `fightDragon`, respectively.
 
-Finally, update `innerText` property of your `text` to be `You are in the town square. You see a sign that says Store.`.
+Finally, update `innerText` property of your `text` to be `"You are in the town square. You see a sign that says Store."`.
 
 # --hints--
 
-You should set the `button1.innerText` property to be `Go to store` in your `goTown` function.
+You should set the `button1.innerText` property to be `"Go to store"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-You should set the `button2.innerText` property to be `Go to cave` in your `goTown` function.
+You should set the `button2.innerText` property to be `"Go to cave"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-You should set the `button3.innerText` property to be `Fight dragon` in your `goTown` function.
+You should set the `button3.innerText` property to be `"Fight dragon"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -49,7 +49,7 @@ You should set the `button3.onclick` property to be `fightDragon` in your `goTow
 assert.match(goTown.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-You should set the `text.innerText` property to be `You are in the town square. You see a sign that says Store.` in your `goTown` function.
+You should set the `text.innerText` property to be `"You are in the town square. You see a sign that says Store."` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /text\.innerText\s*=\s*('|")You are in the town square. You see a sign that says Store\.\1/);
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
index ade5c4eec71..6935d768e99 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
@@ -28,7 +28,7 @@ assert.match(code, /function\s+update/);
 Your `update` function should take a parameter called `location`.
 
 ```js
-assert.match(update.toString(), /update\(location\)/);
+assert.match(update.toString(), /update\(\s*location\s*\)/);
 ```
 
 Your `update` function should be empty.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
index 090ea1d49fb..1d51cab061e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. For example, here is an object with a key of `name` set to `Quincy Larson`.
+Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. For example, here is an object with a key of `name` set to `"Quincy Larson"`.
 
 ```js
 {
@@ -15,7 +15,7 @@ Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is t
 }
 ```
 
-Add a `name` property to your empty object and give it a value of `town square`.
+Add a `name` property to your empty object and give it a value of `"town square"`.
 
 # --hints--
 
@@ -31,7 +31,7 @@ Your first value of `locations` should have a `name` property.
 assert.isDefined(locations[0].name);
 ```
 
-Your first value of `locations` should have a `name` property with a value of `town square`.
+Your first value of `locations` should have a `name` property with a value of `"town square"`.
 
 ```js
 assert.equal(locations[0].name, "town square");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
index d87dd8591ef..095f48fff37 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
@@ -25,19 +25,19 @@ assert.isString(locations[0]["button text"][1]);
 assert.isString(locations[0]["button text"][2]);
 ```
 
-The first value in the `button text` array should be "Go to store".
+The first value in the `button text` array should be `"Go to store"`.
 
 ```js
 assert.equal(locations[0]["button text"][0], "Go to store");
 ```
 
-The second value in the `button text` array should be "Go to cave".
+The second value in the `button text` array should be `"Go to cave"`.
 
 ```js
 assert.equal(locations[0]["button text"][1], "Go to cave");
 ```
 
-The third value in the `button text` array should be "Fight dragon".
+The third value in the `button text` array should be `"Fight dragon"`.
 
 ```js
 assert.equal(locations[0]["button text"][2], "Fight dragon");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
index 3e694f18e92..6db4ca1f723 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
@@ -23,7 +23,7 @@ Your `text` property should be a string.
 assert.isString(locations[0]["text"]);
 ```
 
-Your `text` property should have the value `You are in the town square. You see a sign that says \"Store\".`
+Your `text` property should have the value `"You are in the town square. You see a sign that says \"Store\"."`
 
 ```js
 assert.equal(locations[0]["text"], "You are in the town square. You see a sign that says \"Store\".");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
index 8915cc6e097..74732cfd0b0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
@@ -37,7 +37,7 @@ Your second `locations` object should have a `button text` property which is an
 assert.isArray(locations[1]["button text"]);
 ```
 
-Your `button text` property should have the string values `Buy 10 health (10 gold)`, `Buy weapon (30 gold)`, and `Go to town square`.
+Your `button text` property should have the string values `"Buy 10 health (10 gold)"`, `"Buy weapon (30 gold)"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[1]["button text"][0], "Buy 10 health (10 gold)");
@@ -65,7 +65,7 @@ Your second `locations` object should have a `text` property which is a string.
 assert.isString(locations[1].text);
 ```
 
-Your second `locations` object should have a `text` property with the value of `You enter the store.`.
+Your second `locations` object should have a `text` property with the value of `"You enter the store."`.
 
 ```js
 assert.equal(locations[1].text, "You enter the store.");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
index 71ce75497a9..fb31a213dc1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
@@ -11,19 +11,19 @@ Now you can consolidate some of your code. Start by copying the code from inside
 
 # --hints--
 
-Your `update` function should set `button1.innerText` to `Go to store`.
+Your `update` function should set `button1.innerText` to `"Go to store"`.
 
 ```js
 assert.match(update.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-Your `update` function should set `button2.innerText` to `Go to cave`.
+Your `update` function should set `button2.innerText` to `"Go to cave"`.
 
 ```js
 assert.match(update.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-Your `update` function should set `button3.innerText` to `Fight dragon`.
+Your `update` function should set `button3.innerText` to `"Fight dragon"`.
 
 ```js
 assert.match(update.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -47,7 +47,7 @@ Your `update` function should set `button3.onclick` to `fightDragon`.
 assert.match(update.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-Your `update` function should set `text.innerText` to `You are in the town square. You see a sign that says \"Store\".`.
+Your `update` function should set `text.innerText` to `"You are in the town square. You see a sign that says \"Store\"."`.
 
 ```js
 assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town square. You see a sign that says \\"Store\\"\."/);
@@ -56,13 +56,13 @@ assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town squa
 Your `goTown` function should be empty.
 
 ```js
-assert.match(goTown.toString(), /function goTown\(\) \{\}/);
+assert.match(goTown.toString(), /function goTown\(\s*\) \{\}/);
 ```
 
 Your `goStore` function should be empty.
 
 ```js
-assert.match(goStore.toString(), /function goStore\(\) \{\}/);
+assert.match(goStore.toString(), /function goStore\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
index d85d256d8ab..87da4de4c7c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
@@ -20,13 +20,13 @@ myFunction();
 You should call the `update` function in the `goTown` function.
 
 ```js
-assert.match(goTown.toString(), /update\(\)/);
+assert.match(goTown.toString(), /update\(\s*\)/);
 ```
 
 Don't forget your ending semi-colon.
 
 ```js
-assert.match(goTown.toString(), /update\(\);/);
+assert.match(goTown.toString(), /update\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
index 4b9d06ffc91..b5aff119d97 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
@@ -20,7 +20,7 @@ Pass your `locations` array into the `update` call.
 You should pass the `locations` array into the `update` call.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
index 30abc14ca2a..318b55c5b67 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
@@ -7,7 +7,7 @@ dashedName: step-62
 
 # --description--
 
-The `locations` array contains two locations: the `town square` and the `store`. Currently you are passing that entire array into the `update` function.
+The `locations` array contains two locations: the `"town square"` and the `"store"`. Currently you are passing that entire array into the `update` function.
 
 Pass in only the first element of the `locations` array by adding `[0]` at the end of the variable. For example: `myFunction(arg[0]);`.
 
@@ -18,25 +18,25 @@ This is called <dfn>bracket notation</dfn>. Values in an array are accessed by i
 You should use bracket notation with `locations`.
 
 ```js
-assert.match(code, /locations\[/);
+assert.match(code, /locations\s*\[/);
 ```
 
 You should access the first object in the `locations` array. Remember that arrays are zero-based.
 
 ```js
-assert.match(code, /locations\[0\]/);
+assert.match(code, /locations\s*\[\s*0\s*\]/);
 ```
 
 You should pass the first object in the `locations` array into the `update` function.
 
 ```js
-assert.match(code, /update\(locations\[0\]\);/);
+assert.match(code, /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 This call should still be in your `goTown()` function.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\[0\]\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
index 52d2ebd2db9..f9ab5d6eb35 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
@@ -9,20 +9,20 @@ dashedName: step-63
 
 Now your `update` function needs to use the argument you pass into it.
 
-Inside the `update` function, change the value of the `button1.innerText` assignment to be `location["button text"]`. That way, you use bracket notation to get the `button text` property of the `location` object passed into the function.
+Inside the `update` function, change the value of the `button1.innerText` assignment to be `location["button text"]`. That way, you use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 # --hints--
 
-Your `update` function should use bracket notation to get the `button text` property of the `location` object passed into the function.
+Your `update` function should use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 ```js
 assert.match(update.toString(), /location[('|")button text\1]/);
 ```
 
-You should assign the value of the `button text` property of the `location` object to the `innerText` property of `button1`.
+You should assign the value of the `"button text"` property of the `location` object to the `innerText` property of `button1`.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
index f8f4139fcc5..0b1dd4fe8da 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
@@ -7,20 +7,20 @@ dashedName: step-64
 
 # --description--
 
-`location["button text"]` is an array with three elements. Change the `button1.innerText` assignment to be the first element of that array instead.
+`location["button text"]` is an array with three elements. Change the `button1.innerText` assignment to be `location["button text"][0]` which represents the first element of the array.
 
 # --hints--
 
-You should access the first element of the `button text` property of the `location` parameter.
+You should access the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.innerText` property to be the first element of the `button text` property of the `location` parameter.
+You should set the `button1.innerText` property to be the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
index 84e7a923cd4..6c675ba7503 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
@@ -7,32 +7,32 @@ dashedName: step-65
 
 # --description--
 
-Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `button text` array, respectively.
+Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `"button text"` array, respectively.
 
 # --hints--
 
-You should access the second element of the `button text` property of the `location` parameter.
+You should access the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.innerText` property to be the second element of the `button text` property of the `location` parameter.
+You should set the `button2.innerText` property to be the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.innerText\s*=\s*location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /button2\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button text` property of the `location` parameter.
+You should access the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.innerText` property to be the third element of the `button text` property of the `location` parameter.
+You should set the `button3.innerText` property to be the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.innerText\s*=\s*location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /button3\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
index 7c27f5363cc..583ae05ef1c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
@@ -7,44 +7,44 @@ dashedName: step-66
 
 # --description--
 
-Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `button functions` array.
+Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `"button functions"` array.
 
 # --hints--
 
-You should access the first element of the `button functions` property of the `location` parameter.
+You should access the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.onclick` property to be the first element of the `button functions` property of the `location` parameter.
+You should set the `button1.onclick` property to be the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.onclick\s*=\s*location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /button1\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should access the second element of the `button functions` property of the `location` parameter.
+You should access the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.onclick` property to be the second element of the `button functions` property of the `location` parameter.
+You should set the `button2.onclick` property to be the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.onclick\s*=\s*location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /button2\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button functions` property of the `location` parameter.
+You should access the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.onclick` property to be the third element of the `button functions` property of the `location` parameter.
+You should set the `button3.onclick` property to be the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.onclick\s*=\s*location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /button3\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
index c126552ad07..fefcce67cf2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
@@ -22,7 +22,7 @@ assert.match(goStore.toString(), /update\(/);
 Your `goStore` function should pass the second element of the `locations` array as your argument to `update()`.
 
 ```js
-assert.match(goStore.toString(), /update\(locations\[1\]\)/);
+assert.match(goStore.toString(), /update\(\s*locations\s*\[\s*1\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
index d1561a0e3bf..1b4c2cc3be4 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
@@ -26,13 +26,13 @@ assert.isFunction(fightBeast);
 `fightSlime` should be empty.
 
 ```js
-assert.match(fightSlime.toString(), /function fightSlime\(\) \{\}/);
+assert.match(fightSlime.toString(), /function fightSlime\(\s*\) \{\}/);
 ```
 
 `fightBeast` should be empty.
 
 ```js
-assert.match(fightBeast.toString(), /function fightBeast\(\) \{\}/);
+assert.match(fightBeast.toString(), /function fightBeast\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
index 048661cec96..0b825b944d0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
@@ -9,14 +9,13 @@ dashedName: step-70
 
 Add a third object to the `locations` array. Give it the same properties as the other two objects.
 
-Set `name` to `cave`. Set `button text` to an array with the strings `Fight slime`, `Fight fanged beast`, and `Go to town square`. Set the `button functions` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `You enter the cave. You see some monsters.`.
+Set `name` to `cave`. Set `button text` to an array with the strings `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`. Set the `"button functions"` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `"You enter the cave. You see some monsters."`.
 
 # --hints--
 
 You should have three values in your `locations` array.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 3);
 ```
 
@@ -26,19 +25,19 @@ Your third `locations` value should be an object.
 assert.isObject(locations[2]);
 ```
 
-Your third `locations` object should have a `name` property with the value of `cave`.
+Your third `locations` object should have a `name` property with the value of `"cave"`.
 
 ```js
 assert.equal(locations[2].name, "cave");
 ```
 
-Your third `locations` object should have a `button text` property which is an array.
+Your third `locations` object should have a `"button text"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button text"]);
 ```
 
-Your `button text` property should have the string values `Fight slime`, `Fight fanged beast`, and `Go to town square`.
+Your `"button text"` property should have the string values `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[2]["button text"][0], "Fight slime");
@@ -46,13 +45,13 @@ assert.equal(locations[2]["button text"][1], "Fight fanged beast");
 assert.equal(locations[2]["button text"][2], "Go to town square");
 ```
 
-Your third `locations` object should have a `button functions` property which is an array.
+Your third `locations` object should have a `"button functions"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button functions"]);
 ```
 
-Your `button functions` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
+Your `"button functions"` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
 
 ```js
 assert.equal(locations[2]["button functions"][0], fightSlime);
@@ -66,7 +65,7 @@ Your third `locations` object should have a `text` property which is a string.
 assert.isString(locations[2].text);
 ```
 
-Your third `locations` object should have a `text` property with the value of `You enter the cave. You see some monsters.`.
+Your third `locations` object should have a `text` property with the value of `"You enter the cave. You see some monsters."`.
 
 ```js
 assert.equal(locations[2].text, "You enter the cave. You see some monsters.");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
index 1f8f2e698b0..b5471b23df9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
@@ -7,7 +7,7 @@ dashedName: step-71
 
 # --description--
 
-Now that you have a `cave` location object, update your `goCave` function to call `update` and pass that new `cave` location. Remember that this is the third element in your `locations` array.
+Now that you have a `"cave"` location object, update your `goCave` function to call `update` and pass that new `"cave"` location. Remember that this is the third element in your `locations` array.
 
 Don't forget to remove your `console.log` call!
 
@@ -16,19 +16,19 @@ Don't forget to remove your `console.log` call!
 You should use bracket notation to access the third element in your `locations` array.
 
 ```js
-assert.match(code, /locations\[2\]/);
+assert.match(code, /locations\s*\[\s*2\s*\]/);
 ```
 
 You should pass the third element in your `locations` array to `update`.
 
 ```js
-assert.match(code, /update\(locations\[2\]\)/);
+assert.match(code, /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 You should call `update` with the third element in your `locations` array in your `goCave` function.
 
 ```js
-assert.match(goCave.toString(), /update\(locations\[2\]\)/);
+assert.match(goCave.toString(), /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 You should not have the `console.log` statement in your `goCave` function.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
index 1aa31253591..be9a66de964 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
@@ -7,7 +7,7 @@ dashedName: step-72
 
 # --description--
 
-Now that your `store` and `cave` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
+Now that your `"store"` and `"cave"` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
 
 For example, here is how you would set `num` equal to `5` less than `num`: `num = num - 5;`.
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
index 4f30b60d67e..0fb0f2e83ec 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
@@ -19,7 +19,7 @@ const total = document.querySelector('#total');
 total.innerText = value;
 ```
 
-You can test this by clicking your "Go to store" button, followed by your "Buy Health" button.
+You can test this by clicking your `"Go to store"` button, followed by your `"Buy Health"` button.
 
 **Note:** Your answer should only be two lines of code.
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
index aaf36e05719..115bda71818 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
@@ -7,17 +7,20 @@ dashedName: step-76
 
 # --description--
 
-What if the player doesn't have enough gold to buy health? When you want to run code conditionally, you can use the `if` statement. Put all of the code in your `buyHealth` function inside an `if` statement. For example:
+What if the player doesn't have enough gold to buy health? When you want to run code conditionally, you can use the <dfn>if</dfn> statement.
+
+An `if` statement is used to make decisions in code. The keyword `if` is followed by a condition in parentheses. If the condition is true, the code inside the curly braces `{}` is executed. If the condition is false, the code inside the curly braces is skipped.
+
+Here is an example of an `if` statement:
 
 ```js
-function myFunction() {
-  if ("condition") {
-    console.log("Hello World!");
-  }
+const num = 5;
+if (num >= 3) {
+  console.log("This code will run because num is greater than or equal to 3.");
 }
 ```
 
-For now, the `if` statement condition should be set to the string `condition` as a placeholder.
+Start by placing all of the code in your `buyHealth` function inside an `if` statement. For the `if` statement condition, check if `gold` is greater than or equal to `10`.
 
 # --hints--
 
@@ -27,16 +30,16 @@ Your `buyHealth` function should have an `if` statement.
 assert.match(buyHealth.toString(), /if/);
 ```
 
-Your `if` statement should have the string `condition` for the condition.
+Your `if` statement should check if `gold` is greater than or equal to `10`.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)/);
 ```
 
 All of your `buyHealth` code should be inside the `if` statement.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)\s*\{[\s\S]*\}/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)\s*{\s*gold\s*-=\s*10;\s*health\s*\+=\s*10;\s*goldText\.innerText\s*=\s*gold;\s*healthText\.innerText\s*=\s*health;\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
index 973e22889e1..051ddd2f2d7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c5db7888af27af23f0dd
-title: Paso 78
+title: Step 77
 challengeType: 0
-dashedName: step-78
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
index 06cc946cc21..1498e6c09c4 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8c65b75664c28a8e59c16
-title: Paso 79
+title: Step 78
 challengeType: 0
-dashedName: step-79
+dashedName: step-78
 ---
 
 # --description--
 
-Inside the `else` statement, set `text.innerText` to equal `You do not have enough gold to buy health.`.
+Inside the `else` statement, set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 # --hints--
 
-Your `buyHealth` function should set `text.innerText` to equal `You do not have enough gold to buy health.`.
+Your `buyHealth` function should set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 ```js
 assert.match(buyHealth.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy health\.\1/);
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
index f1d510c4345..f38b4906897 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c6815f5f1a29735efe1b
-title: Paso 80
+title: Step 79
 challengeType: 0
-dashedName: step-80
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
index a6d966346a8..b2dc007106e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c7322e42962ad53ad204
-title: Paso 81
+title: Step 80
 challengeType: 0
-dashedName: step-81
+dashedName: step-80
 ---
 
 # --description--
 
-Just like your `locations` array, your `weapons` array will hold objects. Add four objects to the `weapons` array, each with two properties: `name` and `power`. The first should have the `name` set to `stick` and the `power` set to `5`. The second should be `dagger` and `30`. The third, `claw hammer` and `50`. The fourth, `sword` and `100`.
+Just like your `locations` array, your `weapons` array will hold objects. Add four objects to the `weapons` array, each with two properties: `name` and `power`. The first should have the `name` set to `"stick"` and the `power` set to `5`. The second should be `"dagger"` and `30`. The third, `"claw hammer"` and `50`. The fourth, `"sword"` and `100`.
 
 # --hints--
 
@@ -26,28 +26,28 @@ assert.isObject(weapons[2]);
 assert.isObject(weapons[3]);
 ```
 
-Your first `weapons` object should have the `name` set to `stick` and the `power` set to `5`.
+Your first `weapons` object should have the `name` set to `"stick"` and the `power` set to `5`.
 
 ```js
 assert.equal(weapons[0].name, 'stick');
 assert.equal(weapons[0].power, 5);
 ```
 
-Your second `weapons` object should have the `name` set to `dagger` and the `power` set to `30`.
+Your second `weapons` object should have the `name` set to `"dagger"` and the `power` set to `30`.
 
 ```js
 assert.equal(weapons[1].name, 'dagger');
 assert.equal(weapons[1].power, 30);
 ```
 
-Your third `weapons` object should have the `name` set to `claw hammer` and the `power` set to `50`.
+Your third `weapons` object should have the `name` set to `"claw hammer"` and the `power` set to `50`.
 
 ```js
 assert.equal(weapons[2].name, 'claw hammer');
 assert.equal(weapons[2].power, 50);
 ```
 
-Your fourth `weapons` object should have the `name` set to `sword` and the `power` set to `100`.
+Your fourth `weapons` object should have the `name` set to `"sword"` and the `power` set to `100`.
 
 ```js
 assert.equal(weapons[3].name, 'sword');
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
index 8a367836a35..dd8e2a5d9ec 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c7a59e72c02bb1c717d2
-title: Paso 82
+title: Step 81
 challengeType: 0
-dashedName: step-82
+dashedName: step-81
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.include(buyWeapon.toString(), 'if');
 Your `if` statement should check if `gold` is greater than or equal to `30`.
 
 ```js
-assert.match(buyWeapon.toString(), /if\s*\(gold\s*>=\s*30\)/);
+assert.match(buyWeapon.toString(), /if\s*\(\s*gold\s*>=\s*30\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
index a389ba72633..570844fee8c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c89e4272512d44fc1c66
-title: Paso 83
+title: Step 82
 challengeType: 0
-dashedName: step-83
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
index 47d3cdbffad..f7e010232a8 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c8cee8e5cf2e001789b4
-title: Paso 84
+title: Step 83
 challengeType: 0
-dashedName: step-84
+dashedName: step-83
 ---
 
 # --description--
 
-The value of the `currentWeapon` variable corresponds to an index in the `weapons` array. The player starts with a `stick`, since `currentWeapon` starts at `0` and `weapons[0]` is the `stick` weapon.
+The value of the `currentWeapon` variable corresponds to an index in the `weapons` array. The player starts with a `"stick"`, since `currentWeapon` starts at `0` and `weapons[0]` is the `"stick"` weapon.
 
 In the `buyWeapon` function, use compound assignment to add `1` to `currentWeapon` - the user is buying the next weapon in the `weapons` array.
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
index 56e87bd8410..c2b63fbfcee 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ca22d29fe62f3952bdf5
-title: Paso 85
+title: Step 84
 challengeType: 0
-dashedName: step-85
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
index fc2c08aba68..8ebcf334d01 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8cb19bd7f8a304e5427a1
-title: Paso 86
+title: Step 85
 challengeType: 0
-dashedName: step-86
+dashedName: step-85
 ---
 
 # --description--
 
-Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `You now have a new weapon.`.
+Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `"You now have a new weapon."`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should update the `innerText` property of the `goldText` element to be `gold
 assert.match(buyWeapon.toString(), /goldText\.innerText\s*=\s*gold/);
 ```
 
-You should update the `innerText` property of the `text` element to be `You now have a new weapon.`.
+You should update the `innerText` property of the `text` element to be `"You now have a new weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a new weapon\.\1/);
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
index 9e63ecf4f4b..81ebba26eab 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cbd1e3595431d5a2b3f1
-title: Paso 87
+title: Step 86
 challengeType: 0
-dashedName: step-87
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
index 1e92cff2591..a55298fd7e8 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cce1b0c32c33017cf2e9
-title: Paso 88
+title: Step 87
 challengeType: 0
-dashedName: step-88
+dashedName: step-87
 ---
 
 # --description--
@@ -22,7 +22,7 @@ let value = array[index];
 You should update `newWeapon` to have the value of `weapons[currentWeapon]`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
index 62a6c6b1afc..af0ce0a447a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ce1dfc990134162b3bd9
-title: Paso 69
+title: Step 88
 challengeType: 0
-dashedName: step-89
+dashedName: step-88
 ---
 
 # --description--
@@ -14,7 +14,7 @@ dashedName: step-89
 You should update `newWeapon` to have the value of `weapons[currentWeapon].name`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]\.name;/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
index e3cd9fd5e95..a06ea68706d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8ce73d0dce43468f6689c
-title: Paso 90
+title: Step 89
 challengeType: 0
-dashedName: step-90
+dashedName: step-89
 ---
 
 # --description--
 
-You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `You now have a new weapon.` string to say `You now have a` and the name of the new weapon. Remember to end the sentence with a period.
+You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `"You now have a new weapon."` string to say `"You now have a "` and the name of the new weapon. Remember to end the sentence with a period.
 
-Here is an example that creates the string `Hello, our name is freeCodeCamp.`:
+Here is an example that creates the string `"Hello, our name is freeCodeCamp."`:
 
 ```js
 const ourName = "freeCodeCamp";
@@ -18,7 +18,7 @@ const ourStr = "Hello, our name is " + ourName + ".";
 
 # --hints--
 
-You should update the `text.innerText` assignment to start with the string `You now have a`.
+You should update the `text.innerText` assignment to start with the string `"You now have a "`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a \1/);
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
index 226cccddf9a..4f2ed89e0ac 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cf22272d6d35af80d4ac
-title: Paso 91
+title: Step 90
 challengeType: 0
-dashedName: step-91
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
index 924e5fe7a18..fddaa343d3b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d0337d7c67377a4a76c6
-title: Paso 92
+title: Step 91
 challengeType: 0
-dashedName: step-92
+dashedName: step-91
 ---
 
 # --description--
 
 Up until now, any time `text.innerText` was updated, the old text was erased. This time, use the `+=` operator to add text to the end of `text.innerText`.
 
-Add the string `In your inventory you have:` - include the spaces at the beginning and the end.
+Add the string `" In your inventory you have: "` - include the spaces at the beginning and the end.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should use the `+=` operator to add to `text.innerText`.
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*/)
 ```
 
-You should add the string `In your inventory you have:` to the end of `text.innerText`. Mind the spaces!
+You should add the string `" In your inventory you have: "` to the end of `text.innerText`. Mind the spaces!
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
index 0019ad648f0..d2d697233c5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d08668fa8b38732486e9
-title: Paso 93
+title: Step 92
 challengeType: 0
-dashedName: step-93
+dashedName: step-92
 ---
 
 # --description--
@@ -11,7 +11,7 @@ At the end of the second `text.innerText` string you just added, use the concate
 
 # --hints--
 
-You should not change the `In your inventory you have:` string.
+You should not change the `" In your inventory you have: "` string.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
index 18ec38a296c..08f3472f27d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d0c4f12c2239b6618582
-title: Paso 94
+title: Step 93
 challengeType: 0
-dashedName: step-94
+dashedName: step-93
 ---
 
 # --description--
 
-Add an `else` statement to your `buyWeapon` function. In that statement, set `text.innerText` to equal `You do not have enough gold to buy a weapon.`.
+Add an `else` statement to your `buyWeapon` function. In that statement, set `text.innerText` to equal `"You do not have enough gold to buy a weapon."`.
 
 # --hints--
 
@@ -24,13 +24,13 @@ const split = buyWeapon.toString().split(/\s|\n/);
 assert.isAbove(split.indexOf('else'), split.indexOf('if'));
 ```
 
-You should set `text.innerText` to `You do not have enough gold to buy a weapon.`.
+You should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy a weapon.\1/);
 ```
 
-Your `else` statement should set `text.innerText` to `You do not have enough gold to buy a weapon.`.
+Your `else` statement should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 gold = 20;
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
index 98d5e20ad40..b8fe5b50826 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d0fdf2dad83a92883a80
-title: Paso 95
+title: Step 94
 challengeType: 0
-dashedName: step-95
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
index 869e6b54f1f..0814d277818 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d143f2a58e3b6d6e9c33
-title: Paso 96
+title: Step 95
 challengeType: 0
-dashedName: step-96
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
index bc3f14a69d1..821369edf60 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d1c72e8bb13c2074d93c
-title: Paso 97
+title: Step 96
 challengeType: 0
-dashedName: step-97
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
index 4cbb367ee22..5b21812459f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d2146a3e853d0a6e28ca
-title: Paso 98
+title: Step 97
 challengeType: 0
-dashedName: step-98
+dashedName: step-97
 ---
 
 # --description--
 
-Add an `else` statement for your outer `if` statement. Inside this new `else` statement, set `text.innerText` to `You already have the most powerful weapon!`.
+Add an `else` statement for your outer `if` statement. Inside this new `else` statement, set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 # --hints--
 
@@ -18,13 +18,13 @@ const matches = buyWeapon.toString().match(/else/g);
 assert.equal(matches.length, 2);
 ```
 
-You should set `text.innerText` to `You already have the most powerful weapon!`.
+You should set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 ```js
 assert.match(buyWeapon.toString(), /('|")You already have the most powerful weapon!\1/);
 ```
 
-You should modify your `text.innerText` to `You already have the most powerful weapon!` within your outer `else` statement.
+You should modify your `text.innerText` to `"You already have the most powerful weapon!"` within your outer `else` statement.
 
 ```js
 currentWeapon = 5;
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
index b7d83d7015d..8adbb83ea32 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d24c97461b3ddb9397c8
-title: Paso 99
+title: Step 98
 challengeType: 0
-dashedName: step-99
+dashedName: step-98
 ---
 
 # --description--
 
 Once a player has the most powerful weapon, you can give them the ability to sell their old weapons.
 
-In the outer `else` statement, set `button2.innerText` to `Sell weapon for 15 gold`. Also set `button2.onclick` to the function name `sellWeapon`.
+In the outer `else` statement, set `button2.innerText` to `"Sell weapon for 15 gold"`. Also set `button2.onclick` to the function name `sellWeapon`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should set the value of `button2.innerText`.
 assert.match(buyWeapon.toString(), /button2\.innerText/);
 ```
 
-You should set the value of `button2.innerText` to `Sell weapon for 15 gold`.
+You should set the value of `button2.innerText` to `"Sell weapon for 15 gold"`.
 
 ```js
 assert.match(buyWeapon.toString(), /button2\.innerText\s*=\s*('|")Sell weapon for 15 gold\1;/);
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
index bfde86e56b9..f239b5e07bb 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d2e2a073be3edb46116f
-title: Paso 100
+title: Step 99
 challengeType: 0
-dashedName: step-100
+dashedName: step-99
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.isFunction(sellWeapon);
 `sellWeapon` should be an empty function.
 
 ```js
-assert.match(sellWeapon.toString(), /sellWeapon\(\)\s*\{\s*\}/);
+assert.match(sellWeapon.toString(), /sellWeapon\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
index 1147de99802..3cf081b462d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d31ebbc10e3fe1b28e03
-title: Paso 101
+title: Step 100
 challengeType: 0
-dashedName: step-101
+dashedName: step-100
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(sellWeapon.toString(), /if/);
 Your `if` statement should check if `inventory.length` is greater than `1`.
 
 ```js
-assert.match(sellWeapon.toString(), /if\s*\(inventory\.length\s*>\s*1\)/);
+assert.match(sellWeapon.toString(), /if\s*\(\s*inventory\.length\s*>\s*1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
index 56ed61d63ee..e185edbdfe4 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d35660db4040ba292193
-title: Paso 102
+title: Step 101
 challengeType: 0
-dashedName: step-102
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
index 6d0116c20e5..c9a8d067c6f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d382cd075f4169223e14
-title: Paso 103
+title: Step 102
 challengeType: 0
-dashedName: step-103
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
index e632852522a..e6174703f8c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d539dc11cb42b5dd7ec8
-title: Paso 104
+title: Step 103
 challengeType: 0
-dashedName: step-104
+dashedName: step-103
 ---
 
 # --description--
@@ -21,19 +21,19 @@ Use the `shift()` method to take the first element from the `inventory` array an
 Your `sellWeapon` function should use the `shift()` method.
 
 ```js
-assert.match(sellWeapon.toString(), /shift\(\)/);
+assert.match(sellWeapon.toString(), /shift\(\s*\)/);
 ```
 
 You should use the `shift()` method on the `inventory` array.
 
 ```js
-assert.match(sellWeapon.toString(), /inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /inventory\.shift\(\s*\)/);
 ```
 
 You should assign the value of `inventory.shift()` to your `currentWeapon` variable.
 
 ```js
-assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
index 4a87b9a993a..9b5f9e125ed 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d61ddfe35744369365b7
-title: Paso 105
+title: Step 104
 challengeType: 0
-dashedName: step-105
+dashedName: step-104
 ---
 
 # --description--
 
-After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `You sold a`, then `currentWeapon`, then the string `.`.
+After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `"You sold a "`, then `currentWeapon`, then the string `"."`.
 
 # --hints--
 
@@ -17,19 +17,19 @@ You should use the assignment operator with `text.innerText`.
 assert.match(sellWeapon.toString(), /text\.innerText\s*=/);
 ```
 
-You should add `You sold a` to `text.innerText`. Spacing is important.
+You should add `"You sold a "` to `text.innerText`. Spacing is important.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1/);
 ```
 
-You should add the value of `currentWeapon` to the `You sold a` string. Use the concatenation operator to do this on the same line.
+You should add the value of `currentWeapon` to the `"You sold a "` string. Use the concatenation operator to do this on the same line.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a\s\1\s*\+\s*\_currentWeapon/);
 ```
 
-You should add the string `.` to the value of `currentWeapon`. Use the concatenation operator to do this on the same line.
+You should add the string `"."` to the value of `currentWeapon`. Use the concatenation operator to do this on the same line.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1\s*\+\s*\_currentWeapon\s+\+\s+('|")\.\2/);
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
index 5356d6f1b39..59c6c536b8b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d6c7001ebc45350e3d16
-title: Paso 106
+title: Step 105
 challengeType: 0
-dashedName: step-106
+dashedName: step-105
 ---
 
 # --description--
 
-Now use the `+=` operator to add the string `In your inventory you have:` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `In your inventory you have:` string.
+Now use the `+=` operator to add the string `" In your inventory you have: "` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `" In your inventory you have: "` string.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const matches = sellWeapon.toString().match(/text\.innerText\s*\+=/g);
 assert.equal(matches.length, 1);
 ```
 
-You should add the string `In your inventory you have:` to the second `text.innerText` line. Spacing matters.
+You should add the string `" In your inventory you have: "` to the second `text.innerText` line. Spacing matters.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*\+=\s*('|") In your inventory you have: \1/);
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
index f69442c6519..c7dfa1f9628 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d7b8ab568b4649998954
-title: Paso 107
+title: Step 106
 challengeType: 0
-dashedName: step-107
+dashedName: step-106
 ---
 
 # --description--
 
-Use an `else` statement to run when the `inventory` length is not more than one. Set the `text.innerText` to say `Don't sell your only weapon!`.
+Use an `else` statement to run when the `inventory` length is not more than one. Set the `text.innerText` to say `"Don't sell your only weapon!"`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ Your `sellWeapon` function should have an `else` statement.
 assert.match(sellWeapon.toString(), /else/);
 ```
 
-You should set `text.innerText` to `Don't sell your only weapon!`.
+You should set `text.innerText` to `"Don't sell your only weapon!"`.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")Don't sell your only weapon!\1/);
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
index 2d6254c4c99..a8068715efb 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d81f539f004776dd9b1e
-title: Paso 108
+title: Step 107
 challengeType: 0
-dashedName: step-108
+dashedName: step-107
 ---
 
 # --description--
 
 Now you can start the code to fight monsters. To keep your code organized, your `fightDragon` function has been moved for you to be near the other `fight` functions.
 
-Below your `weapons` array, define a `monsters` variable and assign it an array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. The first object's values should be `slime`, `2`, and `15`, in order. The second should be `fanged beast`, `8`, and `60`. The third should be `dragon`, `20`, and `300`.
+Below your `weapons` array, define a `monsters` variable and assign it an array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. The first object's values should be `"slime"`, `2`, and `15`, in order. The second should be `"fanged beast"`, `8`, and `60`. The third should be `"dragon"`, `20`, and `300`.
 
 # --hints--
 
@@ -37,7 +37,7 @@ Your `monsters` array should have 3 objects.
 assert(monsters.every(val => typeof val === "object"));
 ```
 
-The first value in your `monsters` array should be an object with a `name` property set to `slime`.
+The first value in your `monsters` array should be an object with a `name` property set to `"slime"`.
 
 ```js
 assert.equal(monsters[0].name, "slime");
@@ -55,7 +55,7 @@ The first value in your `monsters` array should be an object with a `health` pro
 assert.equal(monsters[0].health, 15);
 ```
 
-The second value in your `monsters` array should be an object with a `name` property set to `fanged beast`.
+The second value in your `monsters` array should be an object with a `name` property set to `"fanged beast"`.
 
 ```js
 assert.equal(monsters[1].name, "fanged beast");
@@ -73,7 +73,7 @@ The second value in your `monsters` array should be an object with a `health` pr
 assert.equal(monsters[1].health, 60);
 ```
 
-The third value in your `monsters` array should be an object with a `name` property set to `dragon`.
+The third value in your `monsters` array should be an object with a `name` property set to `"dragon"`.
 
 ```js
 assert.equal(monsters[2].name, "dragon");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
index 47a84c35e2e..f21aeb538fa 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd468debb449b4454086
-title: Paso 109
+title: Step 108
 challengeType: 0
-dashedName: step-109
+dashedName: step-108
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
index 561da9a6968..ca2db4faf54 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd9cdb16324b04cfd958
-title: Paso 110
+title: Step 109
 challengeType: 0
-dashedName: step-110
+dashedName: step-109
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.notMatch(fightSlime.toString(), /let|const/);
 You should call the `goFight` function.
 
 ```js
-assert.match(fightSlime.toString(), /goFight\(\);/);
+assert.match(fightSlime.toString(), /goFight\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
index a295129cad0..dff775b563a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8dfcf7fb1044d2f478fd1
-title: Paso 111
+title: Step 110
 challengeType: 0
-dashedName: step-111
+dashedName: step-110
 ---
 
 # --description--
 
-Following the same pattern, use that code in the `fightBeast` and `fightDragon` functions. Remember that `beast` is at index `1` and `dragon` is at index `2`. Also, remove the `console.log` call from your `fightDragon` function.
+Following the same pattern as the `fightSlime` function, use that code in the `fightBeast` and `fightDragon` functions. Remember that `beast` is at index `1` and `dragon` is at index `2`. Also, remove the `console.log` call from your `fightDragon` function.
 
 # --hints--
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
index 6d0f6df8cac..fa62f97c4f9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e0d1d0110b4ec421489f
-title: Paso 112
+title: Step 111
 challengeType: 0
-dashedName: step-112
+dashedName: step-111
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
index 689c57cd402..9ff3ee038cb 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
@@ -1,20 +1,19 @@
 ---
 id: 62a8e142f7f0bd4fed898de3
-title: Paso 113
+title: Step 112
 challengeType: 0
-dashedName: step-113
+dashedName: step-112
 ---
 
 # --description--
 
-Add a new object to the end of the `locations` array, following the same properties as the rest of the objects. Set `name` to `fight`, `button text` to an array with `Attack`, `Dodge`, and `Run`, `button functions` to an array with `attack`, `dodge`, and `goTown`, and `text` to `You are fighting a monster.`.
+Add a new object to the end of the `locations` array, following the same properties as the rest of the objects. Set `name` to `"fight"`, `"button text"` to an array with `"Attack"`, `"Dodge"`, and `"Run"`, `"button functions"` to an array with `attack`, `dodge`, and `goTown`, and `text` to `"You are fighting a monster."`.
 
 # --hints--
 
 Your `locations` array should have 4 values in it.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 4);
 ```
 
@@ -24,25 +23,25 @@ Your new value should be an object.
 assert.isObject(locations[3]);
 ```
 
-Your new object should have a `name` property set to `fight`.
+Your new object should have a `name` property set to `"fight"`.
 
 ```js
 assert.equal(locations[3].name, "fight");
 ```
 
-Your new object should have a `button text` property set to an array with the strings `Attack`, `Dodge`, and `Run`.
+Your new object should have a `"button text"` property set to an array with the strings `"Attack"`, `"Dodge"`, and `"Run"`.
 
 ```js
 assert.deepEqual(locations[3]["button text"], ["Attack", "Dodge", "Run"]);
 ```
 
-Your new object should have a `button functions` property set to an array with the variables `attack`, `dodge`, and `goTown`.
+Your new object should have a `"button functions"` property set to an array with the variables `attack`, `dodge`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[3]["button functions"], [attack, dodge, goTown]);
 ```
 
-Your new object should have a `text` property set to `You are fighting a monster.`.
+Your new object should have a `text` property set to `"You are fighting a monster."`.
 
 ```js
 assert.equal(locations[3].text, "You are fighting a monster.");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
index cdc61573706..1a6b6592b70 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e1dc897df55108bcb5e8
-title: Paso 114
+title: Step 113
 challengeType: 0
-dashedName: step-114
+dashedName: step-113
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(goFight.toString(), /update/);
 You should pass the fourth object in your `locations` array to your `update` call.
 
 ```js
-assert.match(goFight.toString(), /update\(locations\[3\]\)/);
+assert.match(goFight.toString(), /update\(\s*locations\s*\[\s*3\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
index b3565cddd1f..2e11e5e73a1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e21398ad61520edb724f
-title: Paso 115
+title: Step 114
 challengeType: 0
-dashedName: step-115
+dashedName: step-114
 ---
 
 # --description--
@@ -14,13 +14,13 @@ Below your `update` call, set the `monsterHealth` to be the health of the curren
 You should use bracket notation to access the `monsters` array at the `fighting` index.
 
 ```js
-assert.match(goFight.toString(), /monsters\[fighting\]/);
+assert.match(goFight.toString(), /monsters\s*\[\s*fighting\s*\]/);
 ```
 
 You should assign the value of `monsters[fighting]` to the `monsterHealth` variable.
 
 ```js
-assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\[fighting\](\.health|\[('|")health\2\])/);
+assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\s*\[\s*fighting\s*\]\s*(\.health|\[\s*('|")health\2\s*\])/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
index 36bf1804a3d..ca10f9e64f9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
@@ -1,18 +1,25 @@
 ---
 id: 62a8e24c673b075317cc0b09
-title: Paso 116
+title: Step 115
 challengeType: 0
-dashedName: step-116
+dashedName: step-115
 ---
 
 # --description--
 
-The HTML element that shows the monster's stats has been hidden with CSS. Display the `monsterStats` element by updating the `display` property of the `style` property to `block`. For example, updating the `first` property of the `name` property of `user` would look like:
+By default, the HTML element that shows the monster's stats has been hidden with CSS. When the player clicks the "Fight dragon" button, the monster's stats should be displayed. You can accomplish this by using the <dfn>style</dfn> and <dfn>display</dfn> properties on the `monsterStats` element.
+
+The `style` property is used to access the inline style of an element and the `display` property is used to set the visibility of an element.
+
+Here is an example of how to update the display for a paragraph element:
 
 ```js
-user.name.first = "Naomi";
+const paragraph = document.querySelector('p');
+paragraph.style.display = 'block';
 ```
 
+Display the `monsterStats` element by updating the `display` property of the `style` property to `block`.
+
 # --hints--
 
 You should use dot notation to access the `style` property of `monsterStats`.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
index b51a9ba754c..8629818b67e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e271f8e3d1541f9624ad
-title: Paso 117
+title: Step 116
 challengeType: 0
-dashedName: step-117
+dashedName: step-116
 ---
 
 # --description--
 
-Now, set the `innerText` property of `monsterName` to be the `name` property of the current monster. Do the same for `monsterHealthText` and the `health` property.
+Now, you will need to update the text for the current monster's name and health.
+
+Start by assigning `monsters[fighting].name` to the `innerText` property of `monsterName`. Then, assign `monsterHealth` to the `innerText` property of `monsterHealthText`.
 
 # --hints--
 
@@ -17,10 +19,10 @@ You should use dot notation to access the `innerText` property of `monsterName`.
 assert.match(goFight.toString(), /monsterName\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterName` to be the `name` value of the current monster. Remember that you can get the current monster with `monsters[fighting]`.
+You should assign `monsters[fighting].name` to `monsterName.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\[fighting\]\.name/);
+assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 You should use dot notation to access the `innerText` property of `monsterHealthText`.
@@ -29,10 +31,10 @@ You should use dot notation to access the `innerText` property of `monsterHealth
 assert.match(goFight.toString(), /monsterHealthText\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterHealthText` to be the `health` value of the current monster. You can get the current monster with `monsters[fighting]` or you can access this value using the `monsterHealth` variable that you previously assigned.
+You should assign `monsterHealth` to `monsterHealthText.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\[fighting\]\.health/);
+assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.health/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
index 91e0648cbd9..c715960538e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e35675c18c56354c08cf
-title: Paso 118
+title: Step 117
 challengeType: 0
-dashedName: step-118
+dashedName: step-117
 ---
 
 # --description--
 
-Now you can build the `attack` function. First, update the `text` message to say `The <monster name> attacks.`, replacing `<monster name>` with the name of the monster. Remember you can use the concatenation operator for this.
+Now you can build the `attack` function. First, update the `text` message to say `"The <monster name> attacks."`, replacing `<monster name>` with the name of the monster. Remember you can use the concatenation operator for this.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1/);
 You should use the concatenation operator to add the value of `monsters[fighting].name` to the `The` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 You should use the concatenation operator to add the string `attacks.` to the `monsters[fighting].name` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name\s*\+\s*('|") attacks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name\s*\+\s*('|") attacks\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
index 6783d374696..e062f34ae25 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e41e2f190c58404dd46e
-title: Paso 119
+title: Step 118
 challengeType: 0
-dashedName: step-119
+dashedName: step-118
 ---
 
 # --description--
 
-On a new line, add the string `You attack it with your <weapon>.` to the `text` value, replacing `<weapon>` with the player's current weapon.
+On a new line, use the addition assignment operator(`+=`), to add the string `" You attack it with your <weapon>."` to the `text` value, replacing `<weapon>` with the player's current weapon. Additionally, remember that this line of text starts with a space so it will properly display.
 
 # --hints--
 
@@ -24,7 +24,7 @@ You should use compound assignment with `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=/);
 ```
 
-You should add the string `You attack it with your` to the `text.innerText` value. Remember that spacing matters.
+You should add the string `" You attack it with your "` to the `text.innerText` value. Remember that spacing matters.
 
 ```js
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1/);
@@ -33,13 +33,13 @@ assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it wit
 You should use the concatenation operator to add the current weapon to the string. You can get the current weapon with `weapons[currentWeapon].name`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name/);
 ```
 
-You should use the concatenation operator to end your string with `.`.
+You should use the concatenation operator to end your string with `"."`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name\s*\+\s*('|")\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*\+\s*('|")\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
index 4fe90a135fa..689a350b599 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e45cc600c3591cee671a
-title: Paso 120
+title: Step 119
 challengeType: 0
-dashedName: step-120
+dashedName: step-119
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(attack.toString(), /health\s*-=/);
 You should subtract the monster's current level from `health`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*monsters\[fighting\]\.level/);
+assert.match(attack.toString(), /health\s*-=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
index 5bc7da8ddd4..ac76865ed0a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e49f4df7af5ae2d7a616
-title: Paso 121
+title: Step 120
 challengeType: 0
-dashedName: step-121
+dashedName: step-120
 ---
 
 # --description--
 
-Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon. Remember you have the `currentWeapon` variable and the `power` property.
+Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon.
+
+Remember that you can access the power of the player's current weapon using `weapons[currentWeapon].power`.
 
 # --hints--
 
@@ -20,19 +22,19 @@ assert.match(attack.toString(), /monsterHealth\s*-=/);
 You should use bracket notation with `currentWeapon` to access `weapons`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 You should use dot notation to access the `power` property of `weapons[currentWeapon]`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 You should subtract the `power` of the current weapon from `monsterHealth`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
index babee890eee..01b05467403 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8e4dc6a60f85bf256a0cb
-title: Paso 122
+title: Step 121
 challengeType: 0
-dashedName: step-122
+dashedName: step-121
 ---
 
 # --description--
 
 The `Math` object in JavaScript contains static properties and methods for mathematical constants and functions. One of those is `Math.random()`, which generates a random number from `0` (inclusive) to `1` (exclusive). Another is `Math.floor()`, which rounds a given number down to the nearest integer.
 
-Using these, you can generate a random number within a range. For example, this generates a random number between 1 and 5: `Math.floor(Math.random() * 5) + 1;`.
+Using these, you can generate a random number within a range. For example, this generates a random number between `1` and `5`: `Math.floor(Math.random() * 5) + 1;`.
 
 Following this pattern, use the addition operator (`+`) to add a random number between `1` and the value of `xp` to your `monsterHealth -= weapons[currentWeapon].power`.
 
@@ -24,7 +24,7 @@ assert.lengthOf(attack.toString().match(/monsterHealth/g), 1);
 You should add to the `weapons[currentWeapon].power` value.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+/);
 ```
 
 You should use `Math.floor()`.
@@ -42,25 +42,25 @@ assert.match(attack.toString(), /Math\.random/);
 You should multiply `Math.random()` by the value of `xp`.
 
 ```js
-assert.match(attack.toString(), /Math\.random\(\)\s*\*\s*xp/);
+assert.match(attack.toString(), /Math\.random\(\s*\)\s*\*\s*xp/);
 ```
 
 You should use `Math.floor()` to round the result of `Math.random() * xp` down.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\)\s*\*\s*xp\s*.*\)/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*.*\)/);
 ```
 
 You should add `1` to the result of `Math.floor()`.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 You should add the result of `Math.floor(Math.random() * xp) + 1` to the result of `weapons[currentWeapon].power`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
index 99b0546605f..4931f15d514 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ed36d7a7915dfa444ba2
-title: Paso 123
+title: Step 122
 challengeType: 0
-dashedName: step-123
+dashedName: step-122
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
index d09d278c894..60667347322 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8edd05e27cc668051686f
-title: Paso 124
+title: Step 123
 challengeType: 0
-dashedName: step-124
+dashedName: step-123
 ---
 
 # --description--
@@ -20,13 +20,13 @@ assert.match(attack.toString(), /if/);
 Your `if` statement should check if `health` is less than or equal to `0`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(health\s*<=\s*0\)/);
+assert.match(attack.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 ```
 
 Your `if` statement should call the `lose` function.
 
 ```js
-assert.match(attack.toString(), /lose\(\)/);
+assert.match(attack.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
index 1bf236382ad..96ff553fe4e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee154c8946678775c4a4
-title: Paso 125
+title: Step 124
 challengeType: 0
-dashedName: step-125
+dashedName: step-124
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
index 255e6a0bc8b..2929ee44bf5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee71f018e968a056d369
-title: Paso 126
+title: Step 125
 challengeType: 0
-dashedName: step-126
+dashedName: step-125
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(code, /function\s+defeatMonster/);
 `defeatMonster` should be an empty function.
 
 ```js
-assert.match(defeatMonster.toString(), /defeatMonster\s*\(\)\s*\{\s*\}/);
+assert.match(defeatMonster.toString(), /defeatMonster\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 You should use the `function` keyword to declare `lose`.
@@ -32,7 +32,7 @@ assert.match(code, /function\s+lose/);
 `lose` should be an empty function.
 
 ```js
-assert.match(lose.toString(), /lose\s*\(\)\s*\{\s*\}/);
+assert.match(lose.toString(), /lose\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
index c0983129b6e..f8f57306b03 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8eec45f77bc69e8775294
-title: Paso 127
+title: Step 126
 challengeType: 0
-dashedName: step-127
+dashedName: step-126
 ---
 
 # --description--
 
-Inside the `dodge` function, set `text.innerText` equal to the string `You dodge the attack from the <monster>`. Replace `<monster>` with the name of the monster, using the `name` property.
+Inside the `dodge` function, set `text.innerText` equal to the string `"You dodge the attack from the <monster>"`. Replace `<monster>` with the name of the monster, using the `name` property.
 
 # --hints--
 
-You should assign the string `You dodge the attack from the` to the `text.innerText` property. Remember that spacing matters.
+You should assign the string `"You dodge the attack from the "` to the `text.innerText` property. Remember that spacing matters.
 
 ```js
 assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1/);
@@ -20,7 +20,7 @@ assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack
 You should use the concatenation operator to add the name of the monster to the end of the string. You can get this with `monsters[fighting].name`.
 
 ```js
-assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
index bcc3abc58f6..e32d3bd0439 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8eefe2e68b66ac563816b
-title: Paso 128
+title: Step 127
 challengeType: 0
-dashedName: step-128
+dashedName: step-127
 ---
 
 # --description--
 
-In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. You can get the monster's level with the `level` property.
+In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. Remember you can get the monster's level by using `monsters[fighting].level`.
 
 Here is an example of setting `num` to `num` plus `5` * `8`: `num += 5 * 8`. Use `Math.floor()` to round the result down.
 
@@ -22,13 +22,13 @@ assert.match(defeatMonster.toString(), /gold\s*\+=/);
 You should use `Math.floor()` to round the result of the monster's level times `6.7`.
 
 ```js
-assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\))/);
 ```
 
 You should add the result of `Math.floor(monsters[fighting].level * 6.7)` to `gold`.
 
 ```js
-assert.match(defeatMonster.toString(), /gold\s*\+=\s*(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /gold\s*\+=\s*((Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)))/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
index 5bdf875f7e0..a23344528d5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef6a52292f6bdca4f6f8
-title: Paso 129
+title: Step 128
 challengeType: 0
-dashedName: step-129
+dashedName: step-128
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /xp\s*\+=/);
 You should add the monster's level to `xp`.
 
 ```js
-assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\[fighting\]\.level/);
+assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
index 317f234aec9..d573e966cac 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef8f0c76a46cd221a68c
-title: Paso 130
+title: Step 129
 challengeType: 0
-dashedName: step-130
+dashedName: step-129
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
index e199977d905..4a948c96439 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8efb0e3ce826db8daf80f
-title: Paso 131
+title: Step 130
 challengeType: 0
-dashedName: step-131
+dashedName: step-130
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /update/);
 You should pass `locations[4]` as the argument.
 
 ```js
-assert.match(defeatMonster.toString(), /update\(locations\[4\]\)/);
+assert.match(defeatMonster.toString(), /update\(\s*locations\s*\[\s*4\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
index 518991b3cbe..76fd64bb570 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8eff21c0b0f6ebe5b8e38
-title: Paso 132
+title: Step 131
 challengeType: 0
-dashedName: step-132
+dashedName: step-131
 ---
 
 # --description--
 
 Your `locations` array doesn't have a fifth element, so `locations[4]` doesn't work.
 
-Add a new object at the end of the `locations` array, following the same structure as the other objects. Set `name` to `kill monster`, set `button text` to an array with three `Go to town square` strings, set `button functions` to an array with three `goTown` variables, and set `text` to `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Add a new object at the end of the `locations` array, following the same structure as the other objects. Set `name` to `"kill monster"`, set `"button text"` to an array with three `"Go to town square"` strings, set `"button functions"` to an array with three `goTown` variables, and set `text` to `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 # --hints--
 
@@ -25,25 +25,25 @@ Your fifth `locations` value should be an object.
 assert.isObject(locations[4]);
 ```
 
-Your fifth `locations` value should have a `name` property with the value `kill monster`.
+Your fifth `locations` value should have a `name` property with the value `"kill monster"`.
 
 ```js
 assert.equal(locations[4].name, 'kill monster');
 ```
 
-Your fifth `locations` value should have a `button text` array with three `Go to town square` strings.
+Your fifth `locations` value should have a `"button text"` array with three `"Go to town square"` strings.
 
 ```js
 assert.deepEqual(locations[4]["button text"], ['Go to town square', 'Go to town square', 'Go to town square']);
 ```
 
-Your fifth `locations` value should have a `button functions` array with three `goTown` variables.
+Your fifth `locations` value should have a `"button functions"` array with three `goTown` variables.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, goTown]);
 ```
 
-Your fifth `locations` value should have a `text` property with the value `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Your fifth `locations` value should have a `text` property with the value `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams Arg! as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
index cd152eca537..42320970f45 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8f06fb318666fef69f91e
-title: Paso 133
+title: Step 132
 challengeType: 0
-dashedName: step-133
+dashedName: step-132
 ---
 
 # --description--
 
-The word `Arg!` should have quotes around it. Besides escaping quotes, there is another way you can include quotation marks inside a string.
+The word `"Arg!"` should have quotes around it. Besides escaping quotes, there is another way you can include quotation marks inside a string.
 
-Change the double quotes around the string `The monster screams Arg! as it dies. You gain experience points and find gold.` to single quotes `'`, then add double quotes around `Arg!`.
+Change the double quotes around the string `"The monster screams Arg! as it dies. You gain experience points and find gold."` to single quotes `'`, then add double quotes around `"Arg!"`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should use single quotes around the string.
 assert.match(code, /'The monster screams "?Arg!"? as it dies. You gain experience points and find gold.'/);
 ```
 
-You should use double quotes around `Arg!`.
+You should use double quotes around `"Arg!"`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams "Arg!" as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
index 77f36b0b754..9137e403c0b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f14fe6d1fc72454648c7
-title: Paso 134
+title: Step 133
 challengeType: 0
-dashedName: step-134
+dashedName: step-133
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
index a2888e61f8a..9d984dbb5a9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f1d5f5ddbf74c07f733b
-title: Paso 135
+title: Step 134
 challengeType: 0
-dashedName: step-135
+dashedName: step-134
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(lose.toString(), /update\(/);
 Your `update` function should have `locations[5]` for the argument.
 
 ```js
-assert.match(lose.toString(), /update\(locations\[5\]\)/);
+assert.match(lose.toString(), /update\(\s*locations\s*\[\s*5\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
index a10271957dd..a4d22989a7e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f20463b324759953edad
-title: Paso 136
+title: Step 135
 challengeType: 0
-dashedName: step-136
+dashedName: step-135
 ---
 
 # --description--
@@ -45,7 +45,7 @@ Your `restart` function should set `currentWeapon` to `0`.
 assert.match(restart.toString(), /currentWeapon\s*=\s*0/);
 ```
 
-Your `restart` function should set `inventory` to an array with the string `stick`.
+Your `restart` function should set `inventory` to an array with the string `"stick"`.
 
 ```js
 assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
@@ -54,7 +54,7 @@ assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
 Your `restart` function should call the `goTown()` function.
 
 ```js
-assert.match(restart.toString(), /goTown\(\)/);
+assert.match(restart.toString(), /goTown\(\s*\)/);
 ```
 
 You should set `goldText.innerText` to the value of `gold`.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
index ca0a74f809f..6e05e05b776 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f256b813a476cae51f49
-title: Paso 138
+title: Step 137
 challengeType: 0
-dashedName: step-138
+dashedName: step-137
 ---
 
 # --description--
@@ -41,7 +41,7 @@ You should call the `winGame` function in your `if` block.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\)(\s*\})?/);
+assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\s*\)(\s*\})?/);
 ```
 
 You should add an `else` block.
@@ -55,7 +55,7 @@ Your `else` block should call the `defeatMonster` function.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\)(\s*\})?/);
+assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\s*\)(\s*\})?/);
 ```
 
 # --seed--
@@ -220,7 +220,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
index 87bbaf0de13..a43ddc6b3af 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
@@ -1,6 +1,6 @@
 ---
 id: 62a8f35bde1750791f58773f
-title: Paso 139
+title: Step 139
 challengeType: 0
 dashedName: step-139
 ---
@@ -20,7 +20,7 @@ assert.match(code, /function\s+winGame/);
 Your `winGame` function should call the `update` function and pass in `locations[6]`.
 
 ```js
-assert.match(winGame.toString(), /update\s*\(\s*locations\[6\]\s*\)/);
+assert.match(winGame.toString(), /update\s*\(\s*locations\s*\[\s*6\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -185,7 +185,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
index 6a821e0d27a..f2b63a0893c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
@@ -1,13 +1,13 @@
 ---
 id: 62a94114ce0b8918b487390f
-title: Paso 140
+title: Step 140
 challengeType: 0
 dashedName: step-140
 ---
 
 # --description--
 
-Add another object in the `locations` array. Everything should be the same as the `lose` object, except the `name` should be `win` and the `text` should be `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Add another object in the `locations` array. Everything should be the same as the `lose` object, except the `name` should be `"win"` and the `text` should be `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 # --hints--
 
@@ -23,13 +23,13 @@ Your seventh `locations` value should be an object.
 assert.isObject(locations[6]);
 ```
 
-Your seventh `locations` value should have a `name` property with the value `win`.
+Your seventh `locations` value should have a `name` property with the value `"win"`.
 
 ```js
 assert.equal(locations[6].name, 'win');
 ```
 
-Your seventh `locations` value should have a `button text` array with three `REPLAY?` strings.
+Your seventh `locations` value should have a `button text` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[6]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
@@ -41,10 +41,10 @@ Your seventh `locations` value should have a `button functions` array with three
 assert.deepEqual(locations[6]["button functions"], [restart, restart, restart]);
 ```
 
-Your seventh `locations` value should have a `text` property with the value `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Your seventh `locations` value should have a `text` property with the value `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 ```js
-assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! 🎉');
+assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! &#x1F389;');
 ```
 
 # --seed--
@@ -210,7 +210,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 --fcc-editable-region--
 ];
@@ -228,7 +228,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
index 691626bf7fc..b7bad4b4074 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1cea594f152ba626b872
-title: Paso 141
+title: Step 141
 challengeType: 0
 dashedName: step-141
 ---
@@ -16,7 +16,7 @@ Inside your `attack` function, change your `health -= monsters[fighting].level;`
 You should update your `health` line to be `health -= getMonsterAttackValue(monsters[fighting].level);`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(monsters\[fighting\]\.level\)/);
+assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)/);
 ```
 
 # --seed--
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -204,7 +204,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
index 062865ee3b6..f55432b2c36 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1d6736ba262cfa74344b
-title: Paso 142
+title: Step 142
 challengeType: 0
 dashedName: step-142
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
index a6236e943f3..94bef351fd7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1d9f535e102e4663e7a6
-title: Paso 143
+title: Step 143
 challengeType: 0
 dashedName: step-143
 ---
@@ -22,13 +22,13 @@ assert.match(code, /const\s+hit/);
 You should use the equation `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(Math\.random\(\)\s*\*\s*xp\))/);
+assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\))/);
 ```
 
 You should set `hit` to the value of `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(code, /hit\s*=\s*\(level\s*\*\s*5\)\s*-\s*\(Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\)/);
+assert.match(code, /hit\s*=\s*\(\s*level\s*\*\s*5\s*\)\s*-\s*\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
index 9bc2a7db7cf..1ac1b564f17 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1e3c7c3d552fb04f0f18
-title: Paso 144
+title: Step 144
 challengeType: 0
 dashedName: step-144
 ---
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
index 806636a9d4a..4258cf8fd54 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1e8ccd579330e097ce44
-title: Paso 145
+title: Step 145
 challengeType: 0
 dashedName: step-145
 ---
@@ -188,13 +188,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -211,7 +211,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
index 32db6ad0020..52b90e06276 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1eec891ed731db227a36
-title: Paso 146
+title: Step 146
 challengeType: 0
 dashedName: step-146
 ---
@@ -207,13 +207,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -230,7 +230,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
index 101149b1d96..351dab64559 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1fed3d4e873366ff3131
-title: Paso 147
+title: Step 147
 challengeType: 0
 dashedName: step-147
 ---
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
index 67c84c806df..8ac903940a1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa204c1e1d33348ff09944
-title: Paso 148
+title: Step 148
 challengeType: 0
 dashedName: step-148
 ---
@@ -14,7 +14,7 @@ Move your `monsterHealth` assignment into your `if` block.
 You should move your `monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1` into your `if` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1/)
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
index 87e1d768e49..0f1429cf2ad 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
@@ -1,26 +1,26 @@
 ---
 id: 62aa20e9cf1be9358f5aceae
-title: Paso 149
+title: Step 149
 challengeType: 0
 dashedName: step-149
 ---
 
 # --description--
 
-Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `You miss.` to the end of `text.innerText`.
+Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `" You miss."` to the end of `text.innerText`.
 
 # --hints--
 
 You should add an `else` block after your `if (isMonsterHit())` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else/)
 ```
 
-You should add the text `You miss.` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
+You should add the text `" You miss."` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
index 2b9c4380583..d416bbb7431 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2136fc49b836dfedb959
-title: Paso 150
+title: Step 150
 challengeType: 0
 dashedName: step-150
 ---
@@ -20,7 +20,7 @@ assert.match(code, /function\s+isMonsterHit/);
 Your `isMonsterHit` function should return the result of the comparison `Math.random() > .2`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2/);
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
index 1321874f60b..7784c2d49de 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa21971e3b743844849985
-title: Paso 151
+title: Step 151
 challengeType: 0
 dashedName: step-151
 ---
@@ -32,7 +32,7 @@ assert.match(isMonsterHit.toString(), /\|\|\s*health\s*<\s*20/);
 Your function should return the result of the comparison `Math.random() > .2` **or** `health < 20`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
 ```
 
 # --seed--
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
index e4c6e0443dd..fa6e46189de 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa21ea8d9d9f396b95dd87
-title: Paso 152
+title: Step 152
 challengeType: 0
 dashedName: step-152
 ---
@@ -21,7 +21,7 @@ assert.lengthOf(ifs, 5);
 Your new `if` statement should check `Math.random() <= .1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\)\s*<=\s*0?\.1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*<=\s*0?\.1\s*\)/);
 ```
 
 # --seed--
@@ -186,13 +186,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -209,7 +209,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
index f8653db3585..75e7e7fdc67 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa226207f33d3ad4c6f546
-title: Paso 153
+title: Step 153
 challengeType: 0
 dashedName: step-153
 ---
 
 # --description--
 
-Use the `+=` operator to add `Your <weapon> breaks.`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
+Use the `+=` operator to add `" Your <weapon> breaks."`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
 
 # --hints--
 
@@ -21,7 +21,7 @@ assert.lengthOf(concat, 3);
 You should use the `pop` method on the `inventory` array.
 
 ```js
-assert.match(attack.toString(), /inventory\.pop\(\)/);
+assert.match(attack.toString(), /inventory\.pop\(\s*\)/);
 ```
 
 You should add `Your`, with a space before and after it, to `text.innerText`.
@@ -30,17 +30,16 @@ You should add `Your`, with a space before and after it, to `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1/);
 ```
 
-You should add the return value of `inventory.pop()` to the `Your` string.
+You should add the return value of `inventory.pop()` to the `" Your "` string.
 
 ```js
-console.log(attack.toString());
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)/);
 ```
 
-You should add `breaks.`, with a space in front of it, to the end of your string.
+You should add `" breaks."`, with a space in front of it, to the end of your string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)\s*\+\s*('|")\sbreaks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)\s*\+\s*('|")\sbreaks\.\2/);
 ```
 
 # --seed--
@@ -205,13 +204,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -228,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
index ab700a487ba..cb4f98370a3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
@@ -1,13 +1,19 @@
 ---
 id: 62aa22aba186563bcbf2c395
-title: Paso 154
+title: Step 154
 challengeType: 0
 dashedName: step-154
 ---
 
 # --description--
 
-Remember that the increment operator `++` can be used to increase a variable's value by 1. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by 1.
+Remember that the increment operator `++` can be used to increase a variable's value by `1`. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by `1`. For example :
+
+```js
+let num = 10;
+num--;
+console.log(num); // Output: 9
+```
 
 Decrement the value of `currentWeapon` in your `if` statement, after you update the text.
 
@@ -187,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -210,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
index 82a65c7fea5..fb08209886d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa234322d4ad3e8bce42cc
-title: Paso 155
+title: Step 155
 challengeType: 0
 dashedName: step-155
 ---
@@ -24,19 +24,19 @@ if (firstName === "Quincy" && lastName === "Larson") {
 You should not modify your existing `if` statement.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1/);
 ```
 
 You should use the logical AND operator `&&`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&/);
 ```
 
 You should use the logical AND operator to check if `inventory.length` does not equal `1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
 ```
 
 # --seed--
@@ -201,13 +201,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
index b5a07e86ee3..3320abac13c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2469c77b363fdb4f0e06
-title: Paso 156
+title: Step 156
 challengeType: 0
 dashedName: step-156
 ---
@@ -28,7 +28,7 @@ assert.match(easterEgg.toString(), /update\(/);
 `easterEgg` should call the `update` function with `locations[7]` as the argument.
 
 ```js
-assert.match(easterEgg.toString(), /update\(\s*locations\[7\]\s*\)/);
+assert.match(easterEgg.toString(), /update\(\s*locations\s*\[\s*7\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
index 070bb4e95f8..bc5c75fdb1e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa252c3b1073415ba2b898
-title: Paso 157
+title: Step 157
 challengeType: 0
 dashedName: step-157
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
index 56fe0eb3286..c4f60b0792a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa258da314ef42ba0a1858
-title: Paso 158
+title: Step 158
 challengeType: 0
 dashedName: step-158
 ---
@@ -211,13 +211,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -234,7 +234,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
index 48ec8b29f06..5bcd8e739c0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa25fcb5837d43b4d9873d
-title: Paso 159
+title: Step 159
 challengeType: 0
 dashedName: step-159
 ---
 
 # --description--
 
-Add another object to your `locations` array. Set `name` to `easter egg`, set `button text` to an array with the strings `2`, `8`, and `Go to town square?`, set `button functions` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Add another object to your `locations` array. Set `name` to `"easter egg"`, set `"button text"` to an array with the strings `"2"`, `"8"`, and `"Go to town square?"`, set `"button functions"` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 # --hints--
 
@@ -23,25 +23,25 @@ Your eighth `locations` value should be an object.
 assert.isObject(locations[7]);
 ```
 
-Your eighth `locations` value should have a `name` property with the value `easter egg`.
+Your eighth `locations` value should have a `name` property with the value `"easter egg"`.
 
 ```js
 assert.equal(locations[7].name, "easter egg");
 ```
 
-Your eighth `locations` value should have a `button text` array with the strings `2`, `8`, and `Go to town square?`.
+Your eighth `locations` value should have a `"button text"` array with the strings `"2"`, `"8"`, and `"Go to town square?"`.
 
 ```js
 assert.deepEqual(locations[7]["button text"], ["2", "8", "Go to town square?"]);
 ```
 
-Your eighth `locations` value should have a `button functions` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
+Your eighth `locations` value should have a `"button functions"` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[7]["button functions"], [pickTwo, pickEight, goTown]);
 ```
 
-Your eighth `locations` value should have a `text` property with the value `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Your eighth `locations` value should have a `text` property with the value `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 ```js
 assert.equal(locations[7].text, "You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!");
@@ -209,13 +209,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
 --fcc-editable-region--
 
@@ -235,7 +235,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
index d97567ddf79..144e384890e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2626c3c10244b94c787b
-title: Paso 160
+title: Step 160
 challengeType: 0
 dashedName: step-160
 ---
@@ -14,7 +14,7 @@ Inside `pick`, use `const` to initialize a variable named `numbers` and set it t
 Your `pick` function should initialize `numbers` to an empty array `[]`.
 
 ```js
-assert.match(pick.toString(), /numbers\s*=\s*\[\]/);
+assert.match(pick.toString(), /numbers\s*=\s*\[\s*\]/);
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
index 60d2817f60a..690b9c4efd5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa264d23cdaa45a20efada
-title: Paso 161
+title: Step 161
 challengeType: 0
 dashedName: step-161
 ---
@@ -195,13 +195,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
index fde2c4aed56..c7319b7da11 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa26cca3cd3d46c431e73b
-title: Paso 162
+title: Step 162
 challengeType: 0
 dashedName: step-162
 ---
@@ -20,13 +20,13 @@ assert.match(pick.toString(), /numbers\.push\(/);
 You should use `Math.floor(Math.random() * 11)` to create the random number.
 
 ```js
-assert.match(pick.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)/);
+assert.match(pick.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)/);
 ```
 
 You should `push` the result of `Math.floor(Math.random() * 11)` to the end of the `numbers` array.
 
 ```js
-assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)\s*\)/);
+assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
index 806df853fb3..50ee79091f1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
@@ -1,29 +1,29 @@
 ---
 id: 62aa27227399d647e1c37a3c
-title: Paso 163
+title: Step 163
 challengeType: 0
 dashedName: step-163
 ---
 
 # --description--
 
-After the `while` loop, set `text.innerText` to equal `You picked <someGuess>. Here are the random numbers:`. Replace `<someGuess>` with the `guess` function parameter.
+After the `while` loop, set `text.innerText` to equal `"You picked <someGuess>. Here are the random numbers:"`. Replace `<someGuess>` with the `guess` function parameter.
 
 # --hints--
 
-You should set `text.innerText` to the string `You picked`. Remember that spacing matters.
+You should set `text.innerText` to the string `"You picked "`. Remember that spacing matters.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1/);
 ```
 
-You should use the concatenation operator to add the value of the `guess` parameter to your `You picked` string.
+You should use the concatenation operator to add the value of the `guess` parameter to your `"You picked "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess/);
 ```
 
-You should use the concatenation operator to add the string `. Here are the random numbers:` to your `"You picked " + guess` string.
+You should use the concatenation operator to add the string `". Here are the random numbers:"` to your `"You picked " + guess` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\2/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
index ca6b5613733..b5c0ff67275 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa27560def7048d7b4a095
-title: Paso 164
+title: Step 164
 challengeType: 0
 dashedName: step-164
 ---
@@ -11,7 +11,7 @@ At the end of the string, before the final quote, insert the new line escape cha
 
 # --hints--
 
-You should add the new line escape character `\n` to your `. Here are the random numbers:` string.
+You should add the new line escape character `\n` to your `". Here are the random numbers: "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\\n\2/);
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
index b6e6f86f2e1..bde321651e0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa27c40ca6f04ab8be5fac
-title: Paso 165
+title: Step 165
 challengeType: 0
 dashedName: step-165
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -214,7 +214,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
index aef2afa7468..1f2ce1ffbfa 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa28032d863d4bd8058799
-title: Paso 166
+title: Step 166
 challengeType: 0
 dashedName: step-166
 ---
@@ -11,7 +11,7 @@ dashedName: step-166
 
 The initialization expression is executed only once, before the loop starts, and is often used to define and set up the loop variable. Think of it like declaring a counter to use in your loop.
 
-Many `for` loops use `i` as the counter and start from 0, so change `let x = 1;` to `let i = 0;`.
+Many `for` loops use `i` as the counter and start from `0`, so change `let x = 1;` to `let i = 0;`.
 
 # --hints--
 
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
index 70d708104b0..82b517528b7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa287434dc284cea01157c
-title: Paso 167
+title: Step 167
 challengeType: 0
 dashedName: step-167
 ---
@@ -9,7 +9,7 @@ dashedName: step-167
 
 The second statement in a `for` loop, the condition statement, is evaluated at the beginning of every loop iteration. The loop will continue as long as the condition evaluates to be true.
 
-We want the loop to run 10 times, so change `x < 5` to `i < 10`.
+We want the loop to run `10` times, so change `x < 5` to `i < 10`.
 
 # --hints--
 
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
index 178a3588b87..d87e5e62858 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa28bbd6323e4dfb3ac43e
-title: Paso 168
+title: Step 168
 challengeType: 0
 dashedName: step-168
 ---
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
index 262b7c6bf9b..71875c1a0ea 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa28fb651bf14efa2dbb16
-title: Paso 169
+title: Step 169
 challengeType: 0
 dashedName: step-169
 ---
@@ -20,20 +20,19 @@ assert.match(pick.toString(), /text\.innerText\s*\+=/);
 You should use bracket notation to access `numbers[i]`.
 
 ```js
-assert.match(pick.toString(), /numbers\[i\]/);
+assert.match(pick.toString(), /numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add `numbers[i]` to your `text.innerText` value.
 
 ```js
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add a new-line character after the `numbers[i]` value. Remember that you can do this with `\n`.
 
 ```js
-console.log(pick.toString());
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]\s*\+\s*('|")\\n\1/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]\s*\+\s*('|")\\n\1/);
 ```
 
 # --seed--
@@ -198,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
index 0875681fb5c..5d2de454974 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2943669c9d5026af6985
-title: Paso 170
+title: Step 170
 challengeType: 0
 dashedName: step-170
 ---
@@ -198,13 +198,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
index 4bc18b906ff..659e9a1e4b1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
@@ -1,17 +1,17 @@
 ---
 id: 62aa2999ec27ec516655eba6
-title: Paso 171
+title: Step 171
 challengeType: 0
 dashedName: step-171
 ---
 
 # --description--
 
-Inside the `if` statement, add the string `Right! You win 20 gold!` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
+Inside the `if` statement, add the string `"Right! You win 20 gold!"` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
 
 # --hints--
 
-You should use compound assignment to add the string `Right! You win 20 gold!` to the end of `text.innerText`.
+You should use compound assignment to add the string `"Right! You win 20 gold!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Right! You win 20 gold!\1/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
index 6efec2c75b9..b0868a55bf0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa29d8f8f88152c91350ca
-title: Paso 172
+title: Step 172
 challengeType: 0
 dashedName: step-172
 ---
 
 # --description--
 
-Now add an `else` statement. Inside, add `Wrong! You lose 10 health!` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
+Now add an `else` statement. Inside, add `"Wrong! You lose 10 health!"` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should add an `else` block.
 assert.match(pick.toString(), /else\s*\{/);
 ```
 
-Your `else` block should use compound assignment to add `Wrong! You lose 10 health!` to the end of `text.innerText`.
+Your `else` block should use compound assignment to add `"Wrong! You lose 10 health!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Wrong! You lose 10 health!\1/);
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -226,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
index bcc4e75dd58..650fe59ddd1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2aec2f09d454253aad6c
-title: Paso 173
+title: Step 173
 challengeType: 0
 dashedName: step-173
 ---
@@ -27,7 +27,7 @@ assert.match(pick.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 Your `if` statement should call the `lose` function.
 
 ```js
-assert.match(pick.toString(), /lose\(\)/);
+assert.match(pick.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
@@ -192,13 +192,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -221,7 +221,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
index 2a7013b5abc..ebf70ca3d06 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
@@ -1,19 +1,19 @@
 ---
 id: 62aa2ba9cd881355a6f0a5a8
-title: Paso 174
+title: Step 174
 challengeType: 0
 dashedName: step-174
 ---
 
 # --description--
 
-Looking at your `kill monster` object, `button functions` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `button text`.
+Looking at your `"kill monster"` object, `"button functions"` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `"button text"`.
 
 With this, your RPG game is complete! You can now play around - can you defeat the dragon?
 
 # --hints--
 
-You should update your fifth `locations` object to have a `button functions` property of `[goTown, goTown, easterEgg]`.
+You should update your fifth `locations` object to have a `"button functions"` property of `[goTown, goTown, easterEgg]`.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, easterEgg]);
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
@@ -557,13 +557,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
index a2858d92eaa..f3d11a95837 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
@@ -1,13 +1,13 @@
 ---
 id: 62ba17beef16c563069a65d8
-title: Paso 137
+title: Step 136
 challengeType: 0
-dashedName: step-137
+dashedName: step-136
 ---
 
 # --description--
 
-In the `locations` array, add another object at the end. Set the `name` property to `lose`, set `button text` to an array with three `REPLAY?` strings, set `button functions` to an array with three `restart` variables, and set `text` to `You die. ☠️`. You can copy that text to use the emote.
+In the `locations` array, add another object at the end. Set the `name` property to `"lose"`, set `"button text"` to an array with three `"REPLAY?"` strings, set `"button functions"` to an array with three `restart` variables, and set `text` to `"You die. &#x2620;"`.
 
 # --hints--
 
@@ -23,28 +23,28 @@ Your sixth `locations` value should be an object.
 assert.isObject(locations[5]);
 ```
 
-Your sixth `locations` value should have a `name` property with the value `lose`.
+Your sixth `locations` value should have a `name` property with the value `"lose"`.
 
 ```js
 assert.equal(locations[5].name, 'lose');
 ```
 
-Your sixth `locations` value should have a `button text` array with three `REPLAY?` strings.
+Your sixth `locations` value should have a `"button text"` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[5]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
 ```
 
-Your sixth `locations` value should have a `button functions` array with three `restart` variables.
+Your sixth `locations` value should have a `"button functions"` array with three `restart` variables.
 
 ```js
 assert.deepEqual(locations[5]["button functions"], [restart, restart, restart]);
 ```
 
-Your sixth `locations` value should have a `text` property with the value `You die. ☠️`.
+Your sixth `locations` value should have a `text` property with the value `"You die. &#x2620;"`.
 
 ```js
-assert.equal(locations[5].text, 'You die. ☠️');
+assert.equal(locations[5].text, 'You die. &#x2620;');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
index 34a06eddfb3..eef4af29625 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
@@ -17,7 +17,7 @@ You should declare a `button2` variable with `const`.
 assert.match(code, /const\s+button2/);
 ```
 
-Your `button2` variable should have the value of your `#button2` element.
+Your `button2` variable should have the value of your `"#button2"` element.
 
 ```js
 assert.deepEqual(button2, document.querySelector('#button2'));
@@ -29,7 +29,7 @@ You should declare a `button3` variable with `const`.
 assert.match(code, /const\s+button3/);
 ```
 
-Your `button3` variable should have the value of your `#button3` element.
+Your `button3` variable should have the value of your `"#button3"` element.
 
 ```js
 assert.deepEqual(button3, document.querySelector('#button3'));
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
new file mode 100644
index 00000000000..432c7be3420
--- /dev/null
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
@@ -0,0 +1,356 @@
+---
+id: 65b2f6acce65b7a69751a090
+title: Step 138
+challengeType: 0
+dashedName: step-138
+---
+
+# --description--
+
+In order for the `&#x2620;` emoticon text to properly display on the page, you will need to use the <dfn>innerHTML</dfn> property.
+
+The `innerHTML` property allows you to access or modify the content inside an HTML element using JavaScript.
+
+Here is an example of updating the content for this paragraph element using the `innerHTML`  property.
+
+```html
+<p id="demo">This is a paragraph.</p>
+```
+
+```js
+document.querySelector("#demo").innerHTML = "Hello, innerHTML!";
+```
+
+In the `update` function, change `text.innerText` to `text.innerHTML`.
+
+# --hints--
+
+
+You should use dot notation to access the `innerHTML` property of `text`.
+
+```js
+assert.match(code, /text\.innerHTML/);
+```
+
+You should not use `let` or `const` to access the `innerHTML` property of `text`.
+
+```js
+assert.notMatch(code, /(let|const)\s+text.innerHTML/);
+```
+
+You should set `innerHTML` equal to the `text` property of `location`.
+
+```js
+assert.match(code, /text\.innerHTML\s*=\s*location\.text/);
+```
+
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <link rel="stylesheet" href="./styles.css">
+    <title>RPG - Dragon Repeller</title>
+  </head>
+  <body>
+    <div id="game">
+      <div id="stats">
+        <span class="stat">XP: <strong><span id="xpText">0</span></strong></span>
+        <span class="stat">Health: <strong><span id="healthText">100</span></strong></span>
+        <span class="stat">Gold: <strong><span id="goldText">50</span></strong></span>
+      </div>
+      <div id="controls">
+        <button id="button1">Go to store</button>
+        <button id="button2">Go to cave</button>
+        <button id="button3">Fight dragon</button>
+      </div>
+      <div id="monsterStats">
+        <span class="stat">Monster Name: <strong><span id="monsterName"></span></strong></span>
+        <span class="stat">Health: <strong><span id="monsterHealth"></span></strong></span>
+      </div>
+      <div id="text">
+        Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.
+      </div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+body {
+  background-color: #0a0a23;
+}
+
+#text {
+  background-color: #0a0a23;
+  color: #ffffff;
+  padding: 10px;
+}
+
+#game {
+  max-width: 500px;
+  max-height: 400px;
+  background-color: #ffffff;
+  color: #ffffff;
+  margin: 30px auto 0px;
+  padding: 10px;
+}
+
+#controls,
+#stats {
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #0a0a23;
+}
+
+#monsterStats {
+  display: none;
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #ffffff;
+  background-color: #c70d0d;
+}
+
+.stat {
+  padding-right: 10px;
+}
+
+button {
+  cursor: pointer;
+  color: #0a0a23;
+  background-color: #feac32;
+  background-image: linear-gradient(#fecc4c, #ffac33);
+  border: 3px solid #feac32;
+}
+```
+
+```js
+let xp = 0;
+let health = 100;
+let gold = 50;
+let currentWeapon = 0;
+let fighting;
+let monsterHealth;
+let inventory = ["stick"];
+
+const button1 = document.querySelector('#button1');
+const button2 = document.querySelector("#button2");
+const button3 = document.querySelector("#button3");
+const text = document.querySelector("#text");
+const xpText = document.querySelector("#xpText");
+const healthText = document.querySelector("#healthText");
+const goldText = document.querySelector("#goldText");
+const monsterStats = document.querySelector("#monsterStats");
+const monsterName = document.querySelector("#monsterName");
+const monsterHealthText = document.querySelector("#monsterHealth");
+const weapons = [
+  { name: 'stick', power: 5 },
+  { name: 'dagger', power: 30 },
+  { name: 'claw hammer', power: 50 },
+  { name: 'sword', power: 100 }
+];
+const monsters = [
+  {
+    name: "slime",
+    level: 2,
+    health: 15
+  },
+  {
+    name: "fanged beast",
+    level: 8,
+    health: 60
+  },
+  {
+    name: "dragon",
+    level: 20,
+    health: 300
+  }
+]
+const locations = [
+  {
+    name: "town square",
+    "button text": ["Go to store", "Go to cave", "Fight dragon"],
+    "button functions": [goStore, goCave, fightDragon],
+    text: "You are in the town square. You see a sign that says \"Store\"."
+  },
+  {
+    name: "store",
+    "button text": ["Buy 10 health (10 gold)", "Buy weapon (30 gold)", "Go to town square"],
+    "button functions": [buyHealth, buyWeapon, goTown],
+    text: "You enter the store."
+  },
+  {
+    name: "cave",
+    "button text": ["Fight slime", "Fight fanged beast", "Go to town square"],
+    "button functions": [fightSlime, fightBeast, goTown],
+    text: "You enter the cave. You see some monsters."
+  },
+  {
+    name: "fight",
+    "button text": ["Attack", "Dodge", "Run"],
+    "button functions": [attack, dodge, goTown],
+    text: "You are fighting a monster."
+  },
+  {
+    name: "kill monster",
+    "button text": ["Go to town square", "Go to town square", "Go to town square"],
+    "button functions": [goTown, goTown, goTown],
+    text: 'The monster screams "Arg!" as it dies. You gain experience points and find gold.'
+  },
+  {
+    name: "lose",
+    "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
+    "button functions": [restart, restart, restart],
+    text: "You die. &#x2620;"
+  }
+
+];
+
+// initialize buttons
+button1.onclick = goStore;
+button2.onclick = goCave;
+button3.onclick = fightDragon;
+
+function update(location) {
+  --fcc-editable-region--
+  monsterStats.style.display = "none";
+  button1.innerText = location["button text"][0];
+  button2.innerText = location["button text"][1];
+  button3.innerText = location["button text"][2];
+  button1.onclick = location["button functions"][0];
+  button2.onclick = location["button functions"][1];
+  button3.onclick = location["button functions"][2];
+  text.innerText = location.text;
+  --fcc-editable-region--
+}
+
+function goTown() {
+  update(locations[0]);
+}
+
+function goStore() {
+  update(locations[1]);
+}
+
+function goCave() {
+  update(locations[2]);
+}
+
+function buyHealth() {
+  if (gold >= 10) {
+    gold -= 10;
+    health += 10;
+    goldText.innerText = gold;
+    healthText.innerText = health;
+  } else {
+    text.innerText = "You do not have enough gold to buy health.";
+  }
+}
+
+function buyWeapon() {
+  if (currentWeapon < weapons.length - 1) {
+    if (gold >= 30) {
+      gold -= 30;
+      currentWeapon++;
+      goldText.innerText = gold;
+      let newWeapon = weapons[currentWeapon].name;
+      text.innerText = "You now have a " + newWeapon + ".";
+      inventory.push(newWeapon);
+      text.innerText += " In your inventory you have: " + inventory;
+    } else {
+      text.innerText = "You do not have enough gold to buy a weapon.";
+    }
+  } else {
+    text.innerText = "You already have the most powerful weapon!";
+    button2.innerText = "Sell weapon for 15 gold";
+    button2.onclick = sellWeapon;
+  }
+}
+
+function sellWeapon() {
+  if (inventory.length > 1) {
+    gold += 15;
+    goldText.innerText = gold;
+    let currentWeapon = inventory.shift();
+    text.innerText = "You sold a " + currentWeapon + ".";
+    text.innerText += " In your inventory you have: " + inventory;
+  } else {
+    text.innerText = "Don't sell your only weapon!";
+  }
+}
+
+function fightSlime() {
+  fighting = 0;
+  goFight();
+}
+
+function fightBeast() {
+  fighting = 1;
+  goFight();
+}
+
+function fightDragon() {
+  fighting = 2;
+  goFight();
+}
+
+function goFight() {
+  update(locations[3]);
+  monsterHealth = monsters[fighting].health;
+  monsterStats.style.display = "block";
+  monsterName.innerText = monsters[fighting].name;
+  monsterHealthText.innerText = monsterHealth;
+}
+
+function attack() {
+  text.innerText = "The " + monsters[fighting].name + " attacks.";
+  text.innerText += " You attack it with your " + weapons[currentWeapon].name + ".";
+  health -= monsters[fighting].level;
+  monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1;
+  healthText.innerText = health;
+  monsterHealthText.innerText = monsterHealth;
+   if (health <= 0) {
+    lose();
+  } else if (monsterHealth <= 0) {
+    if (fighting === 2) {
+      winGame();
+    } else {
+      defeatMonster();
+    }
+  }
+}
+
+function dodge() {
+  text.innerText = "You dodge the attack from the " + monsters[fighting].name;
+}
+
+function defeatMonster() {
+  gold += Math.floor(monsters[fighting].level * 6.7);
+  xp += monsters[fighting].level;
+  goldText.innerText = gold;
+  xpText.innerText = xp;
+  update(locations[4]);
+}
+
+function lose() {
+  update(locations[5]);
+}
+
+function restart() {
+  xp = 0;
+  health = 100;
+  gold = 50;
+  currentWeapon = 0;
+  inventory = ["stick"];
+  goldText.innerText = gold;
+  healthText.innerText = health;
+  xpText.innerText = xp;
+  goTown();
+}
+```
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
index 8cc27067d04..beaee81fdfd 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
@@ -22,21 +22,21 @@ You should use bracket notation to access the property of `totalCountPerProduct`
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 You should use the assignment operator to update the value of the property of `totalCountPerProduct` that corresponds to `dessert.id`.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=/);
 ```
 
 You should update the value of `totalCountPerProduct` to be the current value plus one.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\+\s*1/);
 ```
 
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
index 0a8a31e6f9d..5b0a6e82472 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
@@ -17,28 +17,28 @@ You should wrap your right-hand `totalCountPerProduct[dessert.id]` in parenthese
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 You should use the `||` operator.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*/);
 ```
 
 You should use `0` as your fallback value.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
 ```
 
 You should still add `1` to the value.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
index e6222642c31..d5f707e0c8f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
@@ -29,7 +29,7 @@ You should assign the value of `totalCountPerProduct[product.id]` to `currentPro
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\[product\.id\]/);
+assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\s*\[\s*product\.id\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
index 19d89b80fbb..ecaf57adbb9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
@@ -32,7 +32,7 @@ assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*
 You should add an empty callback function to the event listener. Remember to give it an `event` parameter.
 
 ```js
-assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*\s*\}\s*\)/);
+assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*;?\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
index 281b928d725..8841c90786b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
@@ -53,7 +53,7 @@ Your `reduce` call should have an initial value of `0`.
 
 ```js
 const afterCalculateTotal = code.split('calculateTotal')[1];
-assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(total,\s*item\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
+assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(\s*total,\s*item\s*\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
index 794fe7090eb..43af3b4c142 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
@@ -37,7 +37,6 @@ assert.match(afterCalculateTaxes, /amount\s*\*\s*\(\s*this\s*\.\s*taxRate\s*\/\s
 Your `calculateTaxes` method should return the value of the `taxRate` (divided by 100, to convert it to a percent) multiplied by the `amount` parameter.
 
 ```js
-console.log(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 assert.equal(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 ```
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
index afbdd9dc070..8b267ed717d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
@@ -19,37 +19,37 @@ Start by accessing the `#playlist-songs`, `#play`, and `#pause` elements with th
 You should use `document.getElementById()` to get the `#playlist-songs` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should assign the `#playlist-songs` element to the variable `playlistSongs`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#play` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should assign the `#play` element to the variable `playButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#pause` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 You should assign the `#pause` element to the variable `pauseButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
index 162661ade71..a38558729c0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
@@ -16,37 +16,37 @@ Assign them to variables named `nextButton`, `previousButton`, and `shuffleButto
 You should use `document.getElementById()` to get the `#next` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should assign the `#next` element to the variable `nextButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#previous` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should assign the `#previous` element to the variable `previousButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#shuffle` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 You should assign the `#shuffle` element to the variable `shuffleButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
index 129304e5008..86e168e9157 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
@@ -18,13 +18,13 @@ Use `const` to create a variable named `audio` and set it equal to `new Audio()`
 You should use the `new` keyword to create an instance of the `Audio` object.
 
 ```js
-assert.match(code, /new\s+Audio\(\);?/)
+assert.match(code, /new\s+Audio\(\s*\);?/)
 ```
 
 You should assign the `Audio` object to a constant named `audio`.
 
 ```js
-assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\);?/)
+assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
index 23f50cd580a..3677293600c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
@@ -34,7 +34,7 @@ assert.match(code, /userData\?\.songs\.find\(/)
 Your `find` method should have `song` as the parameter of its arrow function callback.
 
 ```js
-assert.match(code, /userData\?\.songs\.find\(\(?song\)?/)
+assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 Your `find` method should use strict equality to check if `song.id` is equal to `id`.
@@ -46,7 +46,7 @@ assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(so
 Your `find` method should be assigned to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\);?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
index aff5cbe3e42..aa3776ae58a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
@@ -13,22 +13,22 @@ Also, set the `audio.title` property equal to `song.title`. This tells the audio
 
 # --hints--
 
-You should not modify the exist `playSong` function and its content.
+You should not modify the existing `playSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?/)
 ```
 
 You should set `audio.src` to `song.src`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?/)
 ```
 
 You should set `audio.title` to `song.title`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
index 6dc99c9c74e..715296dd557 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
@@ -17,13 +17,13 @@ Add an `if` statement to check whether the `userData?.currentSong` is `null` or
 You should create an `if` statement with the condition `userData?.currentSong === null || userData?.currentSong.id !== song.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*/)
 ```
 
 You should set `audio.currentTime` to `0` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
index 97e76f55431..c1a60da5a38 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
@@ -11,9 +11,11 @@ You need to update the current song being played as well as the appearance of th
 
 Start by accessing the `userData` object and its `currentSong` property. Set its value equal to the `song` variable.
 
+*Note*: You should not use the optional chaining operator `?.` in this step because `userData.currentSong` will not be `null` or `undefined` at this point.
+
 # --hints--
 
-You should set `userData.currentSong` to `song`.
+You should assign `song` to `userData.currentSong`.
 
 ```js
 assert.match(code, /userData\.currentSong\s*=\s*song;?/)
@@ -614,7 +616,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   --fcc-editable-region--
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
index 87338742c7f..ce0ad6d72fd 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
@@ -7,9 +7,9 @@ dashedName: step-33
 
 # --description--
 
-You need to hook up the `playSong` function to a `click` event listener so the songs will start playing when the play button is clicked.
+In previous steps you built out the functionality for playing a song. Now you need to add the functionality to the play button so that it will play the current song when it is clicked on.
 
-Add a click event listener to the `playButton` element, then use arrow syntax to pass in a callback with an empty pair of curly braces.
+Use the `addEventListener()` method and pass in a `click` event for the first argument and an empty callback function with arrow syntax for the second argument, e.g., `() => {}`.
 
 # --hints--
 
@@ -22,13 +22,13 @@ assert.match(code, /playButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback into your event listener. Don't forget you also need an empty pair of curly braces.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
index 6fa4cd4046e..a0c3b0d9894 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+songsHTML/);
 You should assign `array.map()` to your `songsHTML`.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\)/);
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
index cae48572fe2..99db8a8e491 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
@@ -32,7 +32,7 @@ assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\
 You should interpolate `song.title` as the content of your `span` element.
 
 ```js
-assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\$\{song\.title\}\s*<\/span>\s*<\/button>/)
+assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\s*\$\{\s*song\.title\s*\}\s*<\/span>\s*<\/button>/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
index 623e305fa01..e3e204cc3d3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
@@ -24,7 +24,7 @@ assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*/)
 Your button element should have an `aria-label` attribute with the value `Delete ${song.title}` as its second attribute and value.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2\s*>/)
 ```
 
 You should paste in the provided `svg` as the content of your `button` element.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
index 45ba01a5c24..89a51fa7a48 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
@@ -24,7 +24,7 @@ Chain the `join()` method to your `map()` method and pass in an empty string for
 You should add `join("")` to the existing code.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\)\s*\.join\(('|")\3\);?/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\s*\)\s*\.join\(\s*('|")\3\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
index d081b9c784a..9c1db85fd25 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
@@ -35,7 +35,7 @@ Call the `renderSongs` function with the `songs` property of `userData`. This wi
 You should call your `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /renderSongs\(userData\?\.songs\)/)
+assert.match(code, /renderSongs\(\s*userData\?\.songs\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
index b6630160c64..2e988be6c46 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
@@ -9,20 +9,20 @@ dashedName: step-34
 
 Within the arrow function of the event listener, add an `if` to check if `userData?.currentSong` is `null`.
 
-Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData.songs` array. This will ensure the first song in the playlist is played first.
+Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData?.songs` array. This will ensure the first song in the playlist is played first.
 
 # --hints--
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
index 2ac4b26e3fd..278bbbd32e1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
@@ -16,20 +16,20 @@ This ensures that the currently playing song will continue to play when the play
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` block to your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.currentSong.id` in the `else` block of your `if` statement.
 
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*playSong\(userData\?\.currentSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*playSong\(\s*userData\?\.currentSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -627,7 +627,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
index b620bef935b..ee3a34e413c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
@@ -28,13 +28,13 @@ assert.isFunction(pauseSong)
 Your `pauseSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `pauseSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
index edec34e67c0..cf2e2d3c2a4 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
@@ -9,15 +9,17 @@ dashedName: step-38
 
 To store the current time of the song when it is paused, set the `songCurrentTime` of the `userData` object to the `currentTime` of the `audio` variable.
 
+*Note*: You should not use optional chaining for this step because `userData.songCurrentTime` will not be `null` or `undefined` at this point.
+
 # --hints--
 
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
-You should set `userData.songCurrentTime` to `audio.currentTime`.
+You should assign `audio.currentTime` to `userData.songCurrentTime`.
 
 ```js
 assert.match(code, /userData\.songCurrentTime\s*=\s*audio\.currentTime;?/)
@@ -618,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
index be0e6107e54..61648b3bb52 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
@@ -16,19 +16,19 @@ To finally pause the song, use the `pause()` method on the `audio` variable. `pa
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `classList` property and the `remove()` method to remove the class `playing` from the `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.remove\(('|")playing\1\);?/)
+assert.match(code, /playButton\.classList\.remove\(\s*('|")playing\1\s*\);?/)
 ```
 
 You should use the `pause()` method on your `audio` variable.
 
 ```js
-assert.match(code, /audio\.pause\(\)/)
+assert.match(code, /audio\.pause\(\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
index 42acc8bf157..7ec849025f2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
@@ -22,13 +22,13 @@ assert.match(code, /pauseButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `pauseSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1,\s*pauseSong\)/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1,\s*pauseSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
index 08923eb5674..f0f76c74eef 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
@@ -16,13 +16,13 @@ To finally play the song, use the `play()` method on the `audio` variable. `play
 You should use the `classList` property and the `add` method to add the class `playing` to `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.add\(("|')playing\1\);?/)
+assert.match(code, /playButton\.classList\.add\(\s*("|')playing\1\s*\);?/)
 ```
 
 You should use the `play()` method on the `audio` variable.
 
 ```js
-assert.match(code, /audio\.play\(\);?/)
+assert.match(code, /audio\.play\(\s*\);?/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
 
   userData.currentSong = song;
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
index 36f1e42f0cb..271205f3360 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
@@ -28,13 +28,13 @@ assert.isFunction(playNextSong)
 Your `playNextSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playNextSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
index c7d3492611d..b3fd5d83292 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
@@ -9,30 +9,30 @@ dashedName: step-44
 
 Inside the `playNextSong` function, create an `if` statement to check if the `currentSong` of `userData` is strictly equal to `null`. This will check if there's no current song playing in the `userData` object.
 
-If the condition is true, call the `playSong` function with the `id` of the first song in the `userData.songs` array as an argument.
+If the condition is true, call the `playSong` function with the `id` of the first song in the `userData?.songs` array as an argument.
 
 # --hints--
 
 You should not modify the existing `playNextSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside the `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
index 1b9bfe98a28..94004cb9a4d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
@@ -14,25 +14,25 @@ Add an `else` block to the `if` statement. Inside the `else` block, call the `ge
 You should not modify the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` to the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 You should set the `currentSongIndex` constant to `getCurrentSongIndex()` inside the `else` block.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*\}/)
 ```
 
 
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -678,7 +678,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
index a3eff50ac02..f3a5c85ffe4 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
@@ -18,25 +18,25 @@ Lastly, call the `playSong` function and pass in `nextSong.id` as the argument.
 You should not modify the existing `if` statement, its `else` block, and content.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex + 1]` to a `nextSong` constant.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `nextSong.id`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*playSong\(nextSong\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*playSong\(\s*nextSong\.id\s*\);?\s*\}/)
 ```
 
 
@@ -635,7 +635,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
index cc0d75cc9df..bb143700ed3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
@@ -22,13 +22,13 @@ assert.match(code, /nextButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playNextSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1,\s*playNextSong\)/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1,\s*playNextSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -675,7 +675,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
index c59ca6f4a0b..326f8dd5fa5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
@@ -26,13 +26,13 @@ assert.isFunction(playPreviousSong)
 Your `playPreviousSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playPreviousSong` function should be empty.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
index 9bd5e54ec35..2088d657d4d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
@@ -16,31 +16,31 @@ Inside the `else` block, create a constant named `currentSongIndex` and assign i
 You should not alter the existing `playPreviousSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should have an `if` statement with the condition `userData?.currentSong === null` inside your `playPreviousSong` function.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*/)
 ```
 
 You should have `return` inside the block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
 ```
 
 You should call `getCurrentSongIndex` and assign it to `currentSongIndex` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -695,7 +695,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
index e5a0c7dac68..7ef2def36b9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
@@ -14,19 +14,19 @@ To get the previous song, subtract `1` from the `currentSongIndex` of `userData?
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex - 1]` to a `previousSong` constant.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `previousSong.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*playSong\(previousSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*playSong\(\s*previousSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
index 40289b7311c..bbe8ffd5083 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
@@ -20,13 +20,13 @@ assert.match(code, /previousButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playPreviousSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1,\s*playPreviousSong\)/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1,\s*playPreviousSong\s*\)/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
index 5e0dec1f6e3..a196f473495 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
@@ -28,19 +28,19 @@ assert.isFunction(highlightCurrentSong)
 Your `highlightCurrentSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*/)
 ```
 
 You should create a `playlistSongElements` constant inside your `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
 ```
 
 You should use the `querySelectorAll()` method to select the `.playlist-song` element and assign it to the `playlistSongElements` constant.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*\};?/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
index ace4c9b61be..2f17c1fa628 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
@@ -22,7 +22,7 @@ assert.isFunction(getCurrentSongIndex);
 Your `getCurrentSongIndex` function should use arrow syntax.
 
 ```js
-assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\)\s*=>\s*{\s*}\s*/);
+assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*/);
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
index 67cbdb65e3c..20a10d81e75 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
@@ -16,7 +16,7 @@ Use `getElementById()` to get the `id` of the currently playing song, then use t
 You should not modify the existing `highlightCurrentSong` function and its content.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*/)
 ```
 
 You should use `document.getElementById()` and pass in `` `song-${userData?.currentSong?.id}` ``.
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -692,7 +692,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
index 5d332170167..203e7bbf6c2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
@@ -33,13 +33,13 @@ assert.match(code, /playlistSongElements\.forEach\(/)
 Your `forEach()` method should have a `songEl` parameter and use arrow syntax.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*/)
 ```
 
 Your `forEach` should have an empty pair of curly braces.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -637,7 +637,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
index d3aa1d72016..9c4d7169fda 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
@@ -16,19 +16,19 @@ Create an `if` statement with the condition `songToHighlight`. For the statement
 You should create an `if` statement with the condition `songToHighlight`.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*/)
 ```
 
 You should use the `setAttribute()` method on `songToHighlight` inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(/)
 ```
 
 You should pass in `"aria-current"` and `"true"` as the first and second argument of your `setAttribute` method.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\)\s*;?\s*\}?/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\s*\)\s*;?\s*\}?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
index 253059dbcac..3cc5de9194d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
@@ -16,7 +16,7 @@ After that, play around with the control buttons to see how the `highlightCurren
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /highlightCurrentSong\(\)/)
+assert.match(code, /highlightCurrentSong\(\s*\)/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -688,7 +688,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
index 1818f6fbe2a..411c75623c7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
@@ -26,13 +26,13 @@ assert.isFunction(setPlayerDisplay)
 Your `setPlayerDisplay` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayerDisplay` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
index 7349086d068..cad066f4af2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
@@ -16,31 +16,31 @@ Access the `#player-song-title` and `#player-song-artist` elements with the `get
 You should not modify the existing `setPlayerDisplay` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use `document.getElementById()` to get the `#player-song-title` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should assign the `#player-song-title` element to the variable `playingSong`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should use `document.getElementById()` to get the `#player-song-artist` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 You should assign the `#player-song-artist` element to the variable `songArtist`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -716,7 +716,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
index cfc7df64b4d..f25c73b177b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -710,7 +710,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
index 8231b10d4d8..9ddeb09fa82 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -725,7 +725,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
index a43450e424f..5afba37c8f0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
@@ -16,7 +16,7 @@ Now you should see the song title and the artist show up in the display.
 You should call the `setPlayerDisplay` function inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayerDisplay\(\);?/)
+assert.match(code, /setPlayerDisplay\(\s*\);?/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
index ed0dfbcedb0..05810ad5156 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
@@ -28,13 +28,13 @@ assert.isFunction(setPlayButtonAccessibleText)
 Your `setPlayButtonAccessibleText` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayButtonAccessibleText` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -719,7 +719,7 @@ const renderSongs = (array) => {
 
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
index b30f76308d3..8f881146771 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
@@ -16,19 +16,19 @@ Don't forget to use optional chaining.
 You should not modify the existing `setPlayButtonAccessibleText` and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should access `userData?.currentSong` or `userData?.songs[0]`.
 
 ```js
-assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 You should assign `userData?.currentSong || userData?.songs[0]` to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -715,7 +715,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
index 48880cb1326..c3180ae1a7a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
@@ -16,7 +16,7 @@ Don't forget you need template interpolation here, so you need to use backticks.
 You should not modify the existing `setPlayButtonAccessibleText` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `setAttribute()` method on `playButton`.
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
index 27507423435..344a6cc888c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
@@ -14,7 +14,7 @@ Now, call the `setPlayButtonAccessibleText` function inside the `playSong` funct
 You should call the `setPlayButtonAccessibleText` inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayButtonAccessibleText\(\);?/)
+assert.match(code, /setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -707,7 +707,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
index 56b6b9531c4..54a579477b2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
@@ -28,13 +28,13 @@ assert.isFunction(shuffle)
 Your `shuffle` function should use an arrow syntax and should not take a parameter.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `shuffle` function  should be empty.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -729,7 +729,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
index a6b90c55595..5d5f04e71e8 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
@@ -24,7 +24,7 @@ Use the `sort()` method on the `userData?.songs` array. Pass a callback to the m
 You should not modify the existing `shuffle` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*{\s*[\s\S]*?\};?/);
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*{\s*[\s\S]*?\};?/);
 ```
 
 You should use the `sort()` method on `userData?.songs`.
@@ -42,7 +42,7 @@ assert.match(code, /userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*/)
 The callback of your `sort()` method should return `Math.random() - 0.5`.
 
 ```js
-assert.match(code, /userData\?.songs\.sort\s*\(\(\)\s*=>(\s*{\s*return\s+Math\.random\(\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\)\s*-\s*0\.5\s*)\);?/);
+assert.match(code, /userData\?.songs\.sort\s*\(\s*\(\s*\)\s*=>(\s*{\s*return\s+Math\.random\(\s*\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\s*\)\s*-\s*0\.5\s*)\s*\);?/);
 ```
 
 # --seed--
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -739,7 +739,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
index f5cded4c0aa..f70fd8c9256 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
@@ -11,6 +11,8 @@ When the shuffle button is pressed, you want to set the `currentSong` to nothing
 
 Set `userData.currentSong` to `null` and `userData.songCurrentTime` to `0`.
 
+*Note*: You should not use optional chaining for this step because you are explicitly setting the `currentSong` and `songCurrentTime` properties to be `null` and `0` respectively.
+
 # --hints--
 
 You should set `userData.currentSong` to `null`.
@@ -620,7 +622,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -720,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
index 950dfbdfe9b..fe2108ac49e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
@@ -16,31 +16,31 @@ Call the `renderSongs` function and pass in `userData?.songs` as an argument. Al
 You should not modify the existing `shuffle` function and its content.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -741,7 +741,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
index 144e3ace3c9..c6f2b77272f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
@@ -22,13 +22,13 @@ assert.match(code, /shuffleButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 You should pass in `shuffle` as the second value of your `click` event listener.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1,\s*shuffle\);?/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1,\s*shuffle\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
index 2a02accfe02..d2dc671c2c5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -746,7 +746,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
index d9136ecd4d6..64b5e9c9ebd 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
@@ -7,7 +7,7 @@ dashedName: step-73
 
 # --description--
 
-Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData.songs` array.
+Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData?.songs` array.
 
 The `filter` method keeps only the elements of an array that satisfy the callback function passed to it:
 
@@ -20,12 +20,14 @@ console.log(numsGreaterThanThree) // Output: [10, 8, 4, 5]
 
 Use the `filter()` method on `userData?.songs`. Pass in `song` as the parameter of the arrow function callback and use implicit return to check if `song.id` is strictly not equal to `id`. Assign all of that to the `userData.songs`.
 
+*Note*: You should not use optional chaining when you assign the result of  `userData?.songs.filter` to `userData.songs` because the `allSongs` array will not be `undefined` or `null` at that point.
+
 # --hints--
 
 You should not modify the existing `deleteSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should use the `filter()` method on `userData?.songs`.
@@ -647,7 +649,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -757,7 +759,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
index 953962dcd7e..696d511f734 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
@@ -18,25 +18,25 @@ After that, call the `highlightCurrentSong` function to highlight the current so
 You should not modify the existing `deleteSong` function and its content.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -634,7 +634,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -745,7 +745,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
index 5f4608c2718..d1437ab1d39 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
@@ -16,7 +16,7 @@ Use an `if` statement to check if the `userData?.currentSong?.id` is equal to th
 You should create an empty `if` statement with the condition `userData?.currentSong?.id === id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
index d84e8155cc8..3651df136d9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
@@ -16,31 +16,31 @@ After that, call the `pauseSong()` function to stop the playback and the `setPla
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.currentSong` to `null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.songCurrentTime` to `0`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*.*\s*\}/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -755,7 +755,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
index 009341997ce..4f0f600a29f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
@@ -9,14 +9,14 @@ dashedName: step-78
 
 Next, you need to check if the playlist is empty. If it is, you should reset the `userData` object to its original state.
 
-Use an `if` statement to check if the `userData.songs` has a length of `0`.
+Use an `if` statement to check if the `userData?.songs` has a length of `0`.
 
 # --hints--
 
-You should create an empty `if` statement with the condition `userData.songs.length === 0`
+You should create an empty `if` statement with the condition `userData?.songs.length === 0`.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -738,7 +738,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
index 1b71ef365f2..371c06ca22b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
@@ -33,19 +33,19 @@ Inside your `if` statement, declare a `resetButton` constant, then use `createEl
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*.*\s*\}/)
 ```
 
 You should use the `createElement` method to create a `button`.
 
 ```js
-assert.match(code, /document\.createElement\(('|")button\1\);?/)
+assert.match(code, /document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 You should assign your newly created `button` element to a `resetButton` constant.
 
 ```js
-assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?/)
+assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 # --seed--
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -708,7 +708,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
 
   }
 --fcc-editable-region--
@@ -769,7 +769,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
index d468fec9b7d..a0a60113f19 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
@@ -18,7 +18,7 @@ Set the `id` attribute of `resetButton` to `reset` and its `aria-label` attribut
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should use `resetButton.id` to create an `id` attribute named `reset` for the `resetButton`.
@@ -628,7 +628,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
index 2ca5204022c..796bbd4b90f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
@@ -32,7 +32,7 @@ assert.match(code, /resetButton\.appendChild\(/)
 You should pass in `resetText` as the value of your first `appendChild()`.
 
 ```js
-assert.match(code, /resetButton\.appendChild\(resetText\);?/)
+assert.match(code, /resetButton\.appendChild\(\s*resetText\s*\);?/)
 ```
 
 You should use the `appendChild()` method on `playlistSongs`.
@@ -44,7 +44,7 @@ assert.match(code, /playlistSongs\.appendChild\(/)
 You should pass in `resetButton` as the value of your second `appendChild()`.
 
 ```js
-assert.match(code, /playlistSongs\.appendChild\(resetButton\);?/)
+assert.match(code, /playlistSongs\.appendChild\(\s*resetButton\s*\);?/)
 ```
 
 # --seed--
@@ -642,7 +642,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -773,7 +773,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
index 63fbf21373a..177f8f244bf 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
@@ -22,13 +22,13 @@ assert.match(code, /resetButton\.addEventListener\(/)
 Your `resetButton` event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 The callback function of your event listener should use arrow syntax and have an empty pair of curly braces.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -690,7 +690,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -760,7 +760,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
index eec90495559..00991177f68 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
@@ -7,22 +7,22 @@ dashedName: step-84
 
 # --description--
 
-You need to assign the `userData.songs` property to the initial `allSongs` array. This will reset the playlist to its original state.
+To reset the playlist to its original state, spread `allSongs` into an array and assign it to `userData.songs`.
 
-Spread `allSongs` into an array and assign it to `userData.songs`.
+*Note*: You should not use optional chaining for the `userData.songs` because the song will not be `null` or `undefined` at this point.
 
 # --hints--
 
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\s*\);?/)
 ```
 
 You should assign `[...allSongs]` to `userData.songs`.
 
 ```js
-assert.match(code, /userData\.songs\s*=\s*\[\.\.\.allSongs\]/)
+assert.match(code, /userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -684,7 +684,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
index 0126b6fda07..bec19adec97 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
@@ -22,25 +22,25 @@ Remove the reset button from the playlist by calling the `remove()` method on th
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*.*\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*.*\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
 You should use the `remove()` method to remove the `resetButton` from the DOM.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*resetButton\.remove\(\);?\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*resetButton\.remove\(\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -702,7 +702,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -776,7 +776,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
index d877c1c8029..1c5abf53e30 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
@@ -24,13 +24,13 @@ assert.match(code, /audio\.addEventListener\(/)
 The event listener you used on on your `audio` variable should listen for an `ended` event.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback to your `ended` event listener.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 
@@ -629,7 +629,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -768,7 +768,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
index c6bc00ad028..38a7a3b9b58 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
@@ -7,14 +7,14 @@ dashedName: step-77
 
 # --description--
 
-Within the button element in the `renderSongs` function, add an `onclick` attribute as the first attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
+Within the button element in the `renderSongs` function, add an `onclick` attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
 
 # --hints--
 
-You should add an `onclick` attribute as the first attribute of the delete button and pass in `deleteSong(${song.id})`.
+You should add an `onclick` attribute to the delete button and pass in `deleteSong(${song.id})`.
 
 ```js
-assert.match(code, /<button\s+onclick=('|")deleteSong\(\$\{song\.id\}\)\1\s*class=('|")playlist-song-delete\2\s*aria-label=('|")Delete\s*\$\{song\.title\}\3\s*>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")deleteSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
index e82cda25f4b..bcbd37b1272 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
@@ -7,30 +7,35 @@ dashedName: step-87
 
 # --description--
 
-Notice that the album art in the HTML and songs in the `allSongs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
+Notice that the album art in the HTML and songs in the `userData.songs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
 
 Next, you need to check if there is a next song to play. Retrieve the current song index by calling the `getCurrentSongIndex()` function, and save it in a `currentSongIndex` constant.
 
-After that, create a `nextSongExists` constant that checks if a next song exists.
+After that, create a `nextSongExists` constant that contains the boolean value `true` or `false` depending on if the next song exists.
 
 # --hints--
 
 You should not modify the existing `ended` event listener and its content.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should create a `currentSongIndex` constant and set it to the calling of the `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
-You should check if a next song exists with `userData?.songs[currentSongIndex + 1] !== undefined` and set it to a `nextSongExists` constant.
+You should check if a next song exists comparing `userData.songs.length` and `currentSongIndex` and set it to a `nextSongExists` constant. If the last index of the songs array (`userData.songs.length - 1`) is bigger than the currentSongIndex that means there is a next song.
 
 ```js
-assert.match(code, /const\s+nextSongExists\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\]\s*!==\s*undefined;?/)
+const secondPart = code.split(`audio.addEventListener("ended", () => {`)[1];
+const middlePart = secondPart.split("});")[0]
+const codeOutputFirstTest = eval(middlePart + "\nnextSongExists;");
+assert.strictEqual(codeOutputFirstTest, true);
+const codeOutputSecondTest = eval(`\nfunction getCurrentSongIndex() { return 100; };\n` + middlePart + "\nnextSongExists;")
+assert.strictEqual(codeOutputSecondTest, false);
 ```
 
 # --seed--
@@ -593,7 +598,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -657,7 +662,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -732,7 +737,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
index 5e1744c5c29..474576ffa76 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
@@ -14,13 +14,13 @@ Use an `if` statement to check if `nextSongExists` exists, then call the `playNe
 You should create an `if` statement with the condition `nextSongExists`.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*/)
 ```
 
 You should call the `playNextSong` function inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -583,7 +583,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -647,7 +647,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
index fadd14cd7ee..28b2904018c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
@@ -14,25 +14,25 @@ If there is no next song in the playlist, use the `else` block to reset the `cur
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `currentSong` property of `userData` to `null` in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `songCurrentTime` property of `userData` to `0` in the `else` block of your `if`statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
 ```
 
 # --seed--
@@ -595,7 +595,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -659,7 +659,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
index 83ec75c27c6..a266eba4859 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
@@ -17,28 +17,28 @@ You should call the `pauseSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /pauseSong\(\);?/)
+assert.match(splitter[1], /pauseSong\(\s*\);?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /setPlayerDisplay\(\);?/)
+assert.match(splitter[1], /setPlayerDisplay\(\s*\);?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -636,7 +636,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -775,7 +775,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
@@ -1418,7 +1418,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -1482,7 +1482,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -1557,7 +1557,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
index 5d7efbb8300..119100d8c39 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
@@ -26,7 +26,7 @@ Inside the `userData` object create a `songs` property. For the value, spread `a
 Your `userData` object should have a `songs` key set to `[...allSongs]`.
 
 ```js
-assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\],?/);
+assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\]\s*,?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
index 676c13ccc61..22c4bc157e9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
@@ -14,7 +14,7 @@ To handle the current song's information and track its playback time, create a `
 You should not modify the existing `userData` object and its content.
 
 ```js
-assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\.\.\.allSongs\],?\s*/);
+assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\s*\.\.\.allSongs\s*\]\s*,?\s*/);
 ```
 
 Your `userData` object should have a `currentSong` key set to `null`.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
index 6b6622b75c7..55c840882a5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
@@ -9,26 +9,26 @@ dashedName: step-30
 
 Add an `else` block to handle the current song's position in the playlist.
 
-Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData.songCurrentTime`.
+Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData?.songCurrentTime`.
 
 # --hints--
 
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 You should add an `else` block to the existing `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
 ```
 
-You should set `audio.currentTime` to `userData.songCurrentTime` inside the `else` block of your `if` statement.
+You should set `audio.currentTime` to `userData?.songCurrentTime` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\.songCurrentTime;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\?\.songCurrentTime;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
index 4156ccb96ea..b90a6d7ed16 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
@@ -20,7 +20,7 @@ assert.match(code, /playlistSongElements\.forEach\(\s*(\(\s*songEl\s*\)|songEl)\
 You should use the `removeAttribute()` method on `songEl` and pass in `"aria-current"`.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(('|")aria-current\1\);?\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(\s*('|")aria-current\1\s*\);?\s*\}\s*\);?/)
 ```
 
 
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -691,7 +691,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
index cdb02ecb0de..b299b3933c3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
@@ -13,10 +13,10 @@ Don't forget you need to interpolate with the dollar sign here.
 
 # --hints--
 
-You should add an `onclick` with the value `playSong(${song.id})` as the second attribute and value of the `button` element.
+You should add an `onclick` attribute with the value `playSong(${song.id})` to the `button` element.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-info\1\s*onclick\s*=\s*('|")playSong\(\$\{song\.id\}\)\2\s*>\s*<span\s+class\s*=\s*('|")playlist-song-title\3\s*>\$\{song\.title\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-artist\4\s*>\$\{song\.artist\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-duration\5\s*>\$\{song\.duration\}<\/span>\s*<\/button>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")playSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
index 392e723d3a6..9e4ecfe6cab 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
@@ -28,19 +28,19 @@ Use the `createTextNode()` method to create a `Reset Playlist` text, then assign
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*\}/)
 ```
 
 You should use `document.createTextNode()` to create a `Reset Playlist` text.
 
 ```js
-assert.match(code, /document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 You should assign your created text node to a `resetText` constant.
 
 ```js
-assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -703,7 +703,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
 
 
@@ -766,7 +766,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
index e188ec06c44..cded90feec7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
@@ -23,13 +23,13 @@ Pass in a callback function to the `map()` method. The callback function should
 The callback function of your `map()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?.*\)?\s*=>\s*\{\s*\}\)/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(.*\)|[^()]+)\s*=>\s*\{\s*\}\s*\)/)
 ```
 
 Your `map()` method should have a `song` parameter in it's callback function.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?song\)?/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
index c3115e350bf..cd5833df60e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
@@ -14,20 +14,20 @@ const animals = ["dog", "cat", "horse"];
 animals.indexOf("cat") // 1
 ```
 
-Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData.currentSong`.
+Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData?.currentSong`.
 
 # --hints--
 
 You should return `userData?.songs.indexOf()` inside your `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\()|(\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(|\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
 ```
 
-You should pass in `userData.currentSong` into the `indexOf()` method.
+You should pass in `userData?.currentSong` into the `indexOf()` method.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\(userData\.currentSong\);?)|(\s*{\s*return\s+userData\?\.songs\.indexOf\(userData\.currentSong\);?)/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?|\s*{\s*return\s+userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?\s*})/)
 ```
 
 # --seed--
@@ -625,7 +625,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
index 6a7c8c9fd92..439da2d32b2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
@@ -23,7 +23,7 @@ Add the `sort()` method to `userData?.songs`.
 You should add the `sort()` method to `userData?.songs`.
 
 ```js
-assert.match(code, /userData\?\.songs\.sort\(*.\);?/);
+assert.match(code, /userData\?\.songs\.sort\(.*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
index 9da37b89f07..61bd2e2730b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
@@ -18,25 +18,25 @@ The variables will not change, so use `const` to declare them.
 You should use `document.getElementById()` to get the `#author-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 You should assign the `#author-container` element to the variable `authorContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#load-more-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 You should assign the `#load-more-btn` element to the variable `loadMoreBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
index 97ea1682f4d..96478bb28d5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
@@ -22,13 +22,13 @@ Make a `GET` request to this URL: `https://cdn.freecodecamp.org/curriculum/news-
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should not have a semi-colon after your `fetch` call.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
index 494a252976e..bbea82edd9e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
@@ -27,37 +27,37 @@ Again, don't terminate the code with a semi-colon yet.
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain the `.then()` method to your `fetch()` syntax
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(/)
 ```
 
 You should add a `res` parameter to your `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
 ```
 
 Your `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
 ```
 
 You should log the `res` parameter to the console so you can see the `Response` object.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
index ddfa1ae0ede..5601be8a1a6 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
@@ -16,19 +16,19 @@ Remove `console.log(res)` and implicitly return `res.json()` instead.
 You should remove the `console.log(res)`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*console\.log\(res\)\)/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should implicitly return `res.json()` in your `.then()`.
 
 ```js
-assert.match(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\)/)
+assert.match(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\);/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\);/)
 ```
 
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
index 7b209367c27..4c9764ebc0e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
@@ -17,7 +17,7 @@ Chain another `.then()` to the existing `.then()` method. This time, pass in `da
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Your first `.then()` should not have a semi-colon.
@@ -29,37 +29,37 @@ assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not not have semi-colon after it.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
index 0953c28f0f6..2c332dc4ced 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
@@ -18,67 +18,67 @@ Chain `.catch()` to the last `.then()`. Pass in a callback function with `err` a
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not have a semicolon.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\);/)
 ```
 
 You should chain the `.catch()` method to the second `.then()` you already have.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
 ```
 
 You should add an `err` parameter to your `.catch()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
 ```
 
 Your `.catch()` method should have an arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
 ```
 
 Your `.catch()` method should use `console.error()` to log `err` to the console with the text `` `There was an error: ${err}` ``. Don't forget to use backticks.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\)\s*;?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
index ddd07c1bce4..bee4497b987 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
@@ -48,7 +48,7 @@ assert.match(code, /let\s+authorDataArr/)
 You should set your `authorDataArr` variable to an empty array (`[]`).
 
 ```js
-assert.match(code, /let\s+authorDataArr\s*=\s*\[\];?/)
+assert.match(code, /let\s+authorDataArr\s*=\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
index a72333823bf..938d70f8439 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
@@ -14,7 +14,7 @@ Inside your `displayAuthors` function, chain `.forEach()` to `authors`.
 You should chain `.forEach()` to `authors`.
 
 ```js
-assert.match(code, /authors\.forEach\(\)/)
+assert.match(code, /authors\.forEach\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
index 81da0934da2..f0f921a5359 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
@@ -34,7 +34,7 @@ assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*/)
 Your callback function should be empty.
 
 ```js
-assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\)\s*=>\s*\{\s*\}\s*\);?/)
+assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
index 3d2e264a7ee..e0843b30334 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
@@ -16,7 +16,7 @@ First, remove your `console.log()` statement. Then, assign `data` to the `author
 You should remove the console log showing the `data`.
 
 ```js
-assert.notMatch(code, /console\.log\(data\);/)
+assert.notMatch(code, /console\.log\(\s*data\s*\);/)
 ```
 
 You should assign `data` to the `authorDataArr` variable
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
index 60cf48b2dfd..137147226a1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
@@ -22,19 +22,19 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should have a console log with the text `Author Data Array:`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1/)
 ```
 
 You should use comma to separate your `Author Data Array:` text and `authorDataArr`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,/)
 ```
 
 `authorDataArr` should be the second argument of your console log statement.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
index 352d8116b61..ae5f39f7731 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
@@ -22,7 +22,7 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should remove the console log statement showing `authorDataArr`
 
 ```js
-assert.notMatch(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.notMatch(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 You should call your `displayAuthors` function.
@@ -34,19 +34,19 @@ assert.match(code, /displayAuthors\(/)
 You should call your `displayAuthors` function and pass in an argument of `authorDataArr.slice()`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first parameter of your `slice()` method should be `startingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second parameter of your `slice()` method should be `endingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\);?/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
index afc8dc86aaa..abd28a7bd85 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
@@ -34,13 +34,13 @@ assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*/)
 Your `fetchMoreAuthors` function should use arrow syntax.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `fetchMoreAuthors` function should be empty.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*\{\s*\}/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
index 0c613c7997c..5299c769edc 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
@@ -24,21 +24,21 @@ You should call your `displayAuthors` function and pass in an argument of `autho
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first argument of your `slice()` method should be `startingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second argument of your `slice()` method should be `endingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\)/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
index ad67d8971f6..28fdb4277f1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
@@ -24,13 +24,13 @@ assert.match(code, /loadMoreBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 Your event listener should take `fetchMoreAuthors` as the function to run.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1,\s*fetchMoreAuthors\);?/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1,\s*fetchMoreAuthors\s*\);?/)
 ```
 
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
index 6be5423126c..55a3d7f3909 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
@@ -24,13 +24,13 @@ assert.match(code, /if\s*\(/)
 Your `if` statement should take in `authorDataArr.length <= endingIndex` as its condition.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*/)
 ```
 
 Your `if` statement should be empty.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
index fc6fb12f7c5..7f133a986bd 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
@@ -28,22 +28,21 @@ assert.match(code, /<p\s*class=("|')bio\1>/);
 You should check if the length of the `bio` text is greater than `50`.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50/)
+assert.match(code, /<p\s*class=("|')bio\1>\s*\$\{\s*bio\.length\s*>\s*50/)
 ```
 
 If the `bio` text is greater than `50` characters, you should extract the first 50 characters with `slice()` and replace the rest with `...`. Don't forget that indexes are zero-based.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:/);
 ```
 
 If the `bio` text is less than 50 characters, use the `bio` text directly.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:\s*bio\s*\}<\/p>/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:\s*bio\s*\}\s*<\/p>/);
 ```
 
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
index cac184bcd99..0e0bb0af961 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
@@ -16,7 +16,7 @@ Inside the `.catch()`, remove the `console.error()` and set the `innerHTML` of t
 You should remove your `console.error` and its text.
 
 ```js
-assert.notMatch(code, /console\.error\(`There\s+was\s+an\s+error:\s+\$\{err\}`\);/)
+assert.notMatch(code, /console\.error\(\s*`There\s+was\s+an\s+error:\s+\$\{err\}`\s*\);/)
 ```
 
 You should access the `innerHTML` of `authorContainer` and set it to a `p` element. Don't forget to surround the `p` element with a template literal.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
index 51385c99c2e..31c06df1a64 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
@@ -96,19 +96,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
index dc35189a303..1e5cfa5dcda 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
@@ -120,19 +120,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
index 3a391f5645e..6c4954275a3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
@@ -111,19 +111,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
index 9411b74d976..a1a2bfa676d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
index 90a9a552b69..de31ea7778c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
@@ -7,8 +7,9 @@ dashedName: step-5
 
 # --description--
 
-Now create a `fieldset` with an `id` set to `lunch`, and a corresponding `legend` and `div` element.
+Next, create a `fieldset` element with the `id` set to `lunch`.
 
+Within that element, create a `legend` element with the text `Lunch`, and an empty `div` with the `class` set to `input-container`.
 # --hints--
 
 You should create a second `fieldset` element in your `form`.
@@ -138,19 +139,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
index 465536931d4..864a53dcc55 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
index ad94b093cf9..522e2776d88 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
@@ -188,19 +188,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
index d50e0a8800e..fc1b5aa19fc 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
index 523c4ebd5b8..7daadf1773c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
@@ -190,19 +190,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
index 3cc243d5281..1973e380d17 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
@@ -196,19 +196,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
index 729e044e3c2..228d17b6329 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
index 0d6de97eb9e..525983bebca 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
index 004586c1de3..35bfd622f35 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
index 33b31a1f605..72aa12e907c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
@@ -29,13 +29,13 @@ You should create a variable called `calorieCounter`.
 assert.isDefined(calorieCounter);
 ```
 
-You should use `document.getElementById()` to get the `#calorie-counter` element.
+You should have `document.getElementById('calorie-counter')` in your code.
 
 ```js
 assert.match(code, /document\.getElementById\(\s*('|")calorie-counter\1\s*\)/g);
 ```
 
-You should store the `#calorie-counter` element in a variable called `calorieCounter`.
+You should assign `document.getElementById('calorie-counter')` to your `calorieCounter` variable.
 
 ```js
 assert.equal(calorieCounter, document.getElementById('calorie-counter'));
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
index 0e9ede96be6..2aa1519e8e8 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
index b5eafed1234..5feb89ad50d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
index 3f819177fca..5d980eaadd5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
@@ -7,6 +7,13 @@ dashedName: step-17
 
 # --description--
 
+In programming, it is standard practice to prefix a variable with `is` or `has` to indicate that the variable is a boolean.
+
+```js
+let isRunning = true;
+let hasCompleted = false;
+```
+
 Declare an `isError` variable and set it to `false`, but use `let` so you can reassign it later.
 
 # --hints--
@@ -148,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
index cff5a0c38e7..8e21990a61b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
@@ -28,7 +28,7 @@ assert.isFunction(cleanInputString);
 Your `cleanInputString` function should take a `str` parameter.
 
 ```js
-assert.match(cleanInputString?.toString(), /\(str\)/);
+assert.match(cleanInputString?.toString(), /\(\s*str\s*\)/);
 ```
 
 `cleanInputString` should be an empty function.
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
index 0e52233307d..40d588a5e7d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
index ef45a5d485d..c0edc3eb4ce 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
index 75cedcec2a3..a20fc8b9b9c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
index 26a177627b0..d6ca16e4144 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
@@ -7,24 +7,26 @@ dashedName: step-22
 
 # --description--
 
-Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
-
 You will need to check if the array `["+", "-", " "]` does not include the current character. You can use a combination of the <dfn>includes()</dfn> method and the <dfn>!</dfn> operator to do this.
 
 The `.includes()` method returns `true` if the array contains the character, and `false` if not. The logical NOT operator (`!`) will return the opposite of the value of the `.includes()` method.
 
-Aquí hay un ejemplo:
+Here is an example checking if the current character is not in the vowels array. If it is not, that current character is pushed into the `consonantArray`:
 
 ```js
-const numbersArray = [1, 2, 3, 4, 5]
-const number = 6
+const inputString = "Hello World";
+const charArray = inputString.split('');
+const consonantArray = [];
 
-if (!numbersArray.includes(number)) {
-  console.log("The number is not in the array.")
+for (let i = 0; i < charArray.length; i++) {
+  if (!['a', 'e', 'i', 'o', 'u'].includes(charArray[i])) {
+    consonantArray.push(charArray[i]);
+  }
 }
-
 ```
 
+Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
+
 # --hints--
 
 Your `for` loop should have an `if` statement.
@@ -37,19 +39,19 @@ Your `for` loop should use `!["+", "-", " "].includes()`.
 
 ```js
 // the loop protection injects code so we have to look at the raw code directly
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(/);
 ```
 
-Your `for` loop should see if `strArray[i]` is found in `["+", "-", " "]`.
+Your `for` loop should see if `!["+", "-", " "].includes(strArray[i])`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?/);
 ```
 
 Your `for` loop should `push` `strArray[i]` to `cleanStrArray`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\[i\]\s*\)\s*;?\s*(\s*\})?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*;?\s*(\s*\})?/);
 ```
 
 # --seed--
@@ -171,19 +173,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
index 6384014cb3d..a82eeb12e30 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
@@ -168,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
index b4e26161857..93cf9f679b5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
index 005f96c03ed..699e36910ae 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
index 479b6e5494c..a1767d7abed 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
index 6b91c123f6f..6aac52aea5a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
index 2c58e82fb2d..095afe0ecdf 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
index 6ab6d43ac3b..6a87906cfd3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
index 9f66db6d9f1..9f397f33bb9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
index a8a1eb42127..abb30c59d17 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
index 1d3f34c56fb..d581072b9c2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
index fde3c0539fc..65773034411 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
index a1b57b362c2..2e304233295 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
index 54418f1bd0b..1ca02abc2dc 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
@@ -6,8 +6,13 @@ dashedName: step-35
 ---
 
 # --description--
+Strings have a <dfn>.match()</dfn> method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
 
-Strings have a `.match()` method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
+```js
+const str = 'example string';
+const regex = /example/;
+const result = str.match(regex); // Returns ['example']
+```
 
 Return the result of calling the `.match()` method on `str` and passing your `regex` variable as the argument. You'll use this match result later on.
 
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
index 2eace909ca9..dc01124a568 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
index ebc4b6c00a9..91c20c4ac0b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
index ec0e2ff06c8..b58af420ed6 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
index 18df322c121..7a2f7f5d7a0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
@@ -26,13 +26,13 @@ Replace your concatenated string in the `querySelector` with a template literal
 You should use a template literal in your `querySelector` method.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`.*`\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`.*`\s*\)/);
 ```
 
 Your template literal should have the value `{targetId} .input-container`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`\$\{targetId\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`\$\{targetId\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
index 2ab6ada9aef..cc5d9038bdd 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
@@ -20,13 +20,13 @@ assert.notMatch(addEntry.toString(), /targetId\s*=/);
 You should replace the `targetId` reference in your template literal with `entryDropdown.value`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 You should add `#` at the beginning of your template literal.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
index d4e3ceb7f80..1b1693d37bf 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
index ca358ecc4ba..a4a98345b16 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
@@ -24,13 +24,13 @@ assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.query
 You should access the `length` property of your `querySelectorAll()`.
 
 ```js
-assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 Your `entryNumber` variable should be the `length` of the `querySelectorAll`.
 
 ```js
-assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 # --seed--
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
index 29f9689769f..93b6b5d571e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
index 3cdb13d8816..d5866f78b21 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
@@ -20,7 +20,7 @@ assert.match(code, /HTMLString\s*=\s*`\n\s*<label>.*<\/label>/);
 Your `label` element should have the text `Entry ${entryNumber} Name`.
 
 ```js
-assert.match(code, /HTMLString\s*=\s*`\n\s*<label>Entry\s\$\{entryNumber\}\sName<\/label>/);
+assert.match(code, /HTMLString\s*=\s*`\n\s*<label>\s*Entry\s\$\{entryNumber\}\sName\s*<\/label>/);
 ```
 
 # --seed--
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
index 5f3afdf4e39..429a3a26d63 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
index 30bc17f7af3..e76b601cf9a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
index 9cc9f1aab5f..7fae331ee21 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
index 74e3babe071..cf3fead46dd 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
@@ -185,19 +185,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
index b9769aab84c..2f68c88d39e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
@@ -172,19 +172,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
index 96f281a7807..a2af8541fcb 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
index 0411612ea8a..31a24988af3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
index 02cb0b3d782..40c0dcc91b0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
@@ -146,19 +146,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
index 926092f6a47..aa005869347 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
index 51bc37d0d6e..9aa997885cc 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
@@ -9,7 +9,25 @@ dashedName: step-50
 
 In the Role Playing Game project, you learned how to set a button's behavior by editing its `onclick` property. You can also edit an element's behavior by adding an event listener.
 
-Call the `.addEventListener()` method of the `addEntryButton`. It takes two arguments. The first is the event to listen to – you should pass the string `click`. The second is the callback function, or the function that runs when the event is triggered. Pass the `addEntry` function as the second argument. Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
+The following example uses the `addEventListener` method to add a click event to a button. When the button is clicked, the `printName` function is called.
+
+```html
+<button class="btn">Print name</button>
+```
+
+```js
+const button = document.querySelector('.btn');
+function printName() {
+  console.log("Jessica");
+}
+button.addEventListener('click', printName);
+```
+
+The `addEventListener` method takes two arguments. The first is the event to listen to. (Ex. `'click'`) The second is the callback function, or the function that runs when the event is triggered.
+
+Call the `.addEventListener()` method on the `addEntryButton`. Pass in the string `click` for the first argument and the `addEntry` function for the second argument.
+
+Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
 
 # --hints--
 
@@ -150,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
index 9d9a481fb30..2d6dd26ef32 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
index 004273b76a4..ed9a1c2740b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
@@ -7,34 +7,26 @@ dashedName: step-56
 
 # --description--
 
-The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is an array-like which contains the elements that match the query selector.
+The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is a list of elements like an array. It contains the elements that match the query selector. You will need to loop through these elements in the list.
 
-You'll need to loop through these elements, so start by creating a `for` loop. Your iterator `i` should start at `0`, continue while it is less than the length of the list, and increment by `1` each iteration.
+In previous steps, you learned how to loop through an array using a `for` loop. You can also use a <dfn>for...of</dfn> loop to loop through an array and a `NodeList`.
+
+A `for...of` loop is used to iterate over elements in an iterable object like an array. The variable declared in the loop represents the current element being iterated over.
+
+```js
+for (const element of elementArray) {
+  console.log(element);
+}
+```
+
+Create a `for...of` loop that loops through the list. For the loop's variable name, use `const` to declare a variable called `item`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should have a `for` loop.
+You should have a `for...of` loop that loops through the `list` parameter. Use `item` for the loop's variable name.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(/g);
-```
-
-Your `for` loop should initialize a variable called `i` to `0`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;/g);
-```
-
-Your `for` loop should have a condition that checks if `i` is less than the length of `list`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;/g);
-```
-
-Your `for` loop should increment `i` by `1` each time it runs. Use the increment operator for this.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)/g);
+assert.match(code, /for\s*\(\s*const\s+item\s+of\s+list\s*\)\s*\{/);
 ```
 
 # --seed--
@@ -156,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
index 6350419e668..6df3e56f634 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
@@ -9,40 +9,20 @@ dashedName: step-57
 
 The `NodeList` values you will pass to `list` will consist of `input` elements. So you will want to look at the `value` attribute of each element.
 
-Assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
+Assign `item.value` to a `const` variable called `currVal`.
 
 # --hints--
 
-You should have a `currVal` variable.
+You should use `const` to declare a new variable called `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=/);
+assert.match(code, /const\s+currVal\s*=/);
 ```
 
-You should access the element in `list` at index `i` using bracket notation.
+You should assign `item.value` to `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]/);
-```
-
-You should access the `value` attribute of the element in `list` at index `i`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]\.value/);
-```
-
-You should assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*list\[i\]\.value/);
-```
-
-Your `currVal` assignment should be in your `for` loop.
-
-```js
-// another hack, because the loop protection injects stuff
-const getCaloriesString = code.split("function getCaloriesFromInputs")[1];
-assert.match(getCaloriesString, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*(const|let)\s+currVal\s*=\s*list\[i\]\.value/g);
+assert.match(code, /const\s+currVal\s*=\s*item\.value/);
 ```
 
 # --seed--
@@ -164,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,15 +224,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
+  --fcc-editable-region--
+  for (const item of list) {
 
   }
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
index ad8db469578..3f75131ea2a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
@@ -9,26 +9,26 @@ dashedName: step-58
 
 Remember that you wrote a function earlier to clean the user's input? You'll need to use that function here.
 
-Update your `currVal` declaration to be the result of calling `cleanInputString` with `list[i].value`.
+Update your `currVal` declaration to be the result of calling `cleanInputString` with `item.value`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should call your `cleanInputString` function.
+You should call the `cleanInputString` function inside the `getCaloriesFromInputs` function.
 
 ```js
 assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(/);
 ```
 
-You should pass `list[i].value` as the argument for `cleanInputString`.
+You should pass `item.value` as the argument for `cleanInputString` function.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 You should assign the result of your `cleanInputString` call to your `currVal` variable.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(code, /const\s+currVal\s*=\s*cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -238,15 +231,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = list[i].value;
+  for (const item of list) {
+    --fcc-editable-region--
+    const currVal = item.value;
+    --fcc-editable-region--
   }
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
index d707353751f..a62a2c7daad 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -239,8 +232,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
 
   }
 }
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
index 3c30f0637e5..2b40afc2326 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,8 +244,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
index d5c2627737b..6455ae3f02c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
@@ -23,13 +23,13 @@ You should use a template literal to pass the `Invalid Input:` message to the `a
 
 ```js
 // because it transforms template literals...
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: /);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: /);
 ```
 
-You should use template literal syntax to display the first value in the `invalidInputMatch` array after the `Invalid Input:` text.
+You should display the first element of the `invalidInputMatch` array after the `Invalid Input:` text by using a template literal.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\)/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\)/);
 ```
 
 # --seed--
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
index c699998d12e..520d3fd25a2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
@@ -7,6 +7,8 @@ dashedName: step-62
 
 # --description--
 
+In programming, `null` is meant to represent the absence of a value. In this case, if the user enters an invalid input, you want to alert them and then return `null` to indicate that the function has failed.
+
 Still within your `if` block, set `isError` to `true` and return `null`.
 
 # --hints--
@@ -14,13 +16,13 @@ Still within your `if` block, set `isError` to `true` and return `null`.
 After your `alert`, you should set `isError` to `true`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true/);
 ```
 
 After you modify `isError`, you should `return` the value `null`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
 ```
 
 # --seed--
@@ -142,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -233,8 +228,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
index 42d598983a7..eae768d35e2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
@@ -17,6 +17,7 @@ Aquí hay un ejemplo:
 
 ```js
 Number('10'); // returns the number 10
+Number('abc'); // returns NaN
 ```
 
 # --hints--
@@ -164,19 +165,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +249,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
index eb7e879fac2..b8d9c77c800 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
@@ -17,12 +17,6 @@ You should `return` the `calories` value.
 assert.match(getCaloriesFromInputs.toString(), /return\s+calories/);
 ```
 
-Your new `return` statement should come after your `for` loop.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /calories\s*\+=\sNumber\(currVal\);\n\s*}\n\s*return\s+calories/)
-```
-
 # --seed--
 
 ## --seed-contents--
@@ -142,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -229,12 +216,11 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -244,9 +230,10 @@ function getCaloriesFromInputs(list) {
     }
     calories += Number(currVal);
   }
+  --fcc-editable-region--
 
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
index 0a1ea5222ea..60df2a8b912 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
@@ -26,7 +26,7 @@ assert.isFunction(calculateCalories);
 Your `calculateCalories` function should take an `e` argument.
 
 ```js
-assert.match(calculateCalories?.toString(), /\(e\)/);
+assert.match(calculateCalories?.toString(), /\(\s*e\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
index 3aeba03c080..8751f2bcde9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
@@ -16,7 +16,7 @@ Add a line to your `calculateCalories` function that calls the `preventDefault()
 Your `calculateCalories` function should call `e.preventDefault()`.
 
 ```js
-assert.match(calculateCalories.toString(), /e\.preventDefault\(\)/);
+assert.match(calculateCalories.toString(), /e\.preventDefault\(\s*\)/);
 ```
 
 Your `calculateCalories` function should reset the global error flag to `false`.
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -240,8 +233,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
index 500be725cf5..f4039a1ea73 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
@@ -22,13 +22,13 @@ assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#breakfast input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `odocument.querySelectorAll()` call to `breakfastNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -249,8 +242,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
index cdd4bdf42ce..1d0e505339a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#lunch input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `lunchNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -248,8 +241,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
index 14e685dc08e..fe0bc4397d2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#dinner input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `dinnerNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `snacksNumberInputs` variable.
@@ -38,13 +38,13 @@ assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#snacks input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `snacksNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `exerciseNumberInputs` variable.
@@ -56,13 +56,13 @@ assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#exercise input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `exerciseNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -285,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
index b49a0e442ad..af94b7d9ca4 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +248,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
index f6963f86a1c..b76b547907b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -254,8 +247,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
index fe2bf1d214e..b1e3fbe67a1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -291,8 +284,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
index d701e54feac..88ef0e31741 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -262,8 +255,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
index 256282f5146..30164df3929 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -260,8 +253,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
index 0f08ebcd2fa..0ef990b0d87 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -270,8 +263,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
index 8ca112a6484..536459f9f42 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -265,8 +258,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
index 039d744d1d5..2916ee1ce21 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
@@ -162,19 +162,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +273,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
index 0a3761ddc35..329cb0a7c90 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
@@ -7,7 +7,7 @@ dashedName: step-78
 
 # --description--
 
-You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element.
+You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element on a new line at the end of the function.
 
 # --hints--
 
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -263,8 +256,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
index dfa6f4db881..7507e91a216 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
@@ -7,9 +7,16 @@ dashedName: step-79
 
 # --description--
 
-Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable, but lowercased.
+When you need to lower case a string, you can use the <dfn>toLowerCase()</dfn> method. This method returns the calling string value converted to lower case.
 
-Strings have a `.toLowerCase()` method that can help you with this. Do not give your `span` any text yet.
+```js
+const firstName = 'JESSICA';
+console.log(firstName.toLowerCase()); // Output: jessica
+```
+
+Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable. Your `surplusOrDeficit` variable should be converted to lower case using the `toLowerCase()` method.
+
+Do not give your `span` any text yet.
 
 # --hints--
 
@@ -160,19 +167,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -279,8 +279,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
index 12b91508e68..013f9612cec 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -258,8 +251,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
index 0ec31164989..bb36410c3ae 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
@@ -9,7 +9,14 @@ dashedName: step-81
 
 When the user has a calorie deficit, the `remainingCalories` value will be negative. You don't want to display a negative number in the result string.
 
-`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number. In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
+`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number.
+
+```js
+const num = -5;
+Math.abs(num); // 5
+```
+
+In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
 
 # --hints--
 
@@ -24,7 +31,7 @@ Your `span` should have the text `${Math.abs(remainingCalories)} Calorie ${surpl
 
 ```js
 const htmlString = code.split(/output\s*\.\s*innerHTML\s*=\s*/)[1].split(/`/)[1];
-assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(remainingCalories\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
+assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(\s*remainingCalories\s*\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
 ```
 
 # --seed--
@@ -146,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -267,8 +267,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
index 76f97a97c38..b7680c9242f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
index 8d7bf0d029d..a338d670feb 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -283,8 +276,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
index 1f3ad48cc4a..33c18dc5ff3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
@@ -158,19 +158,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -282,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
index 065598c2143..3e42fd41afc 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
@@ -9,6 +9,11 @@ dashedName: step-85
 
 Finally, you need to make the `#output` element visible so the user can see your text. Your `output` variable is an Element, which has a `classList` property. This property has a `.remove()` method, which accepts a string representing the class to remove from the element.
 
+```js
+const paragraphElement = document.getElementById('paragraph');
+paragraphElement.classList.remove('hide');
+```
+
 Use the `.remove()` method of the `output` variable's `classList` property to remove the `hide` class. Don't forget to place the word `hide` inside quotes.
 
 # --hints--
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -277,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
index 99dc81816c5..36e4db37d40 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
index 87b8f396263..67de06050e9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
index 8ea6ba403bd..f0bb4dfb507 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
index 06f9f5def66..84db14da9ef 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
@@ -9,6 +9,22 @@ dashedName: step-89
 
 Remember that `document.querySelectorAll` returns a `NodeList`, which is array-like but is not an array. However, the `Array` object has a `.from()` method that accepts an array-like and returns an array. This is helpful when you want access to more robust array methods, which you will learn about in a future project.
 
+The following example takes a `NodeList` of `li` elements and converts it to an array of `li` elements:
+
+```html
+<ul>
+  <li>List 1</li>
+  <li>List 2</li>
+  <li>List 3</li>
+</ul>
+```
+
+```js
+const listItemsArray = Array.from(document.querySelectorAll('li'));
+
+console.log(listItemsArray); //Output: (3) [li, li, li]
+```
+
 Wrap your `inputContainers` query selector in `Array.from()`. Do this on the same line as your declaration.
 
 # --hints--
@@ -144,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -269,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
index 734f79b1cbd..c43f3e046a2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
@@ -7,33 +7,25 @@ dashedName: step-90
 
 # --description--
 
-It is time for another loop. Use a `for` loop to iterate through the `inputContainers` array.
+It is time for another loop. Create a `for...of` loop with a variable called `container` to iterate through the `inputContainers` array.
 
-Inside the loop, set the `innerHTML` property of the element at the current index to an empty string. This will clear all of the contents of that input container.
+Inside the loop, set the `innerHTML` property of the `container` to an empty string. This will clear all of the contents of that input container.
 
 # --hints--
 
-Your `clearForm` function should have a `for` loop.
+Your `for...of` loop should iterate through the `inputContainers` array. The loop's variable name should be `container`.
 
 ```js
-// loop protect injects stuff, so let's look at the raw code again
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(/);
+assert.match(clearForm, /for\s*\(\s*const\s+container\s+of\s+inputContainers\s*\)/);
 ```
 
-Your `for` loop should iterate through the `inputContainers` array. Remember to use `i` as your iterator.
+Your `for...of` loop should set the `innerHTML` property of `container` to an empty string.
 
 ```js
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*inputContainers\.length\s*;\s*i\s*\+\+\s*\)/);
-```
-
-Your `for` loop should set the `innerHTML` property of `inputContainers[i]` to an empty string.
-
-```js
-const clearForm = code.split("function clearForm()")[1];
-const forLoop = clearForm.split("for")[1];
-assert.match(forLoop, /inputContainers\[\s*i\s*\]\s*\.innerHTML\s*=\s*(`|'|")\1\s*/);
+const forOfLoop = clearForm.split("for")[1];
+assert.match(forOfLoop, /container\s*\.\s*innerHTML\s*=\s*(`|'|")\1\s*/);
 ```
 
 # --seed--
@@ -155,19 +147,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +265,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
index 2313c4f6139..e93f41584a2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
index 40a5bcd0f54..e4affe5cbf8 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
index 2b898b5497f..b83f36d49ec 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
index 3e0d2b45545..b2ec7ece6e9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -292,8 +285,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
@@ -425,19 +418,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -550,8 +536,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -567,8 +553,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
index e67c4922517..e47da926676 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
@@ -16,13 +16,13 @@ In your `createLabel` function, declare a `label` variable and assign it a new `
 You should declare a `label` variable in your `createLabel` function.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*(?:const|let|var)\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*(?:const|let|var)\s+label/);
 ```
 
 Your `label` variable should be declared with `const`.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*const\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*const\s+label/);
 ```
 
 You should use the `.createElement()` method of the `document` object.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
index 50aa4e801c0..4724876b09e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
@@ -22,7 +22,7 @@ assert.match(code, /letters\.forEach\(/);
 You should pass your `createLabel` function reference to the `.forEach()` method.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*createLabel\s*\)/);
+assert.match(code, /letters\.forEach\(\s*(?:\(\s*([\S]*)\s*\)|\s*([\S]*))\s*=>\s*createLabel\(\s*\1\2\s*\)\s*\)|letters\.forEach\(\s*createLabel\s*\)/);
 ```
 
 You should not pass a `createLabel` function call.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
index 8e017805db6..bbfc57e61d5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-In your callback, call `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
+In your callback, you will need to make two function calls. Start by calling `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
 
 Then call the `.forEach()` method on your `letters` array. Pass an empty callback function which takes a `letter` parameter.
 
@@ -46,7 +46,13 @@ assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{/)
 Your callback function should be empty.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{\s*\}/)
+assert.match(code, /letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}/)
+```
+
+Your `letters.forEach()` callback function should be nested inside the `range(1, 99).forEach(number => {}` callback function.
+
+```js
+assert.match(code, /range\s*\(\s*1\s*,\s*99\s*\)\s*.forEach\s*\(\s*(\(\s*number\s*\)|number)\s*=>\s*\{\s*[^}]*letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}\s*\)\s*\}\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
index f29bb6b96d6..228890996df 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
@@ -9,8 +9,6 @@ dashedName: step-17
 
 Now in your nested `.forEach()` call, declare an `input` variable. Use the `.createElement()` method of the `document` object to create an `input` element. Set the `type` attribute to `text` and the `id` attribute to `letter + number`.
 
-For accessibility, set the `aria-label` attribute to the same value as the `id` attribute.
-
 # --hints--
 
 You should declare an `input` variable.
@@ -67,18 +65,6 @@ You should set the `id` attribute of your `input` element to `letter + number`.
 assert.match(code, /input\.id\s*=\s*letter\s\+\snumber/)
 ```
 
-You should access the `ariaLabel` property of your `input` element.
-
-```js
-assert.match(code, /input\.ariaLabel/);
-```
-
-You should set the `aria-label` attribute of your `input` element to `letter + number`.
-
-```js
-assert.match(code, /input\.ariaLabel\s*=\s*letter\s\+\snumber/)
-```
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
index ec0ce8c301a..42633bfd960 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
@@ -1,8 +1,8 @@
 ---
 id: 643498328cb52026123e2b91
-title: Paso 18
+title: Step 19
 challengeType: 0
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
index 76a5bd1c920..8d1ddcd5fb5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
@@ -1,8 +1,8 @@
 ---
 id: 643498755d54c6279ba09078
-title: Paso 19
+title: Step 20
 challengeType: 0
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
index a940ac47ac9..9d06932a530 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
@@ -1,8 +1,8 @@
 ---
 id: 6437124c4c03dd4c8fb35d56
-title: Paso 20
+title: Step 21
 challengeType: 0
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
index 60dd1557d17..58e532930ff 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
@@ -1,8 +1,8 @@
 ---
 id: 6437133052eaf04d7300e622
-title: Paso 21
+title: Step 22
 challengeType: 0
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
index da8dac54745..b23e311ab0e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
@@ -1,8 +1,8 @@
 ---
 id: 643715013330824ecaa70442
-title: Paso 22
+title: Step 23
 challengeType: 0
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
index f08c6a5e64d..deb4a393803 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d1e5af8c0148fbef96d
-title: Paso 23
+title: Step 24
 challengeType: 0
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
index 89a6c051963..8c9bacddb49 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d80bc174a158c973080
-title: Paso 24
+title: Step 25
 challengeType: 0
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
@@ -50,19 +50,19 @@ assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*n
 The first element of the array passed to `average()` should be the element at the `middle` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]/);
 ```
 
 The first element of the array passed to `average()` should be the element at the `middle + 1` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\)/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)/);
 ```
 
 If the ternary is false, you should return the value of `sorted` at the `middle` index. Use `Math.ceil()` to round the `middle` value up.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\[\s*Math\.ceil\(\s*middle\s*\)\s*\];?/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\s*\[\s*Math\.ceil\(\s*middle\s*\)\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
index 5e04b2b54be..efe3f42753d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
@@ -1,8 +1,8 @@
 ---
 id: 64496df724dd3716a71fe971
-title: Paso 25
+title: Step 26
 challengeType: 0
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
index cf2a7d09b13..7b8b7d9ffe6 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
@@ -1,8 +1,8 @@
 ---
 id: 64496e9c6d7a2e189948e441
-title: Paso 26
+title: Step 27
 challengeType: 0
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
index 3d55888a9f8..52e6a20efa0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
@@ -1,8 +1,8 @@
 ---
 id: 6449749d20436c1f1dfadcf2
-title: Paso 27
+title: Step 28
 challengeType: 0
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
index d6ce60a7b07..63c290f2fb7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
@@ -1,8 +1,8 @@
 ---
 id: 6449755666005520330cec5b
-title: Paso 28
+title: Step 29
 challengeType: 0
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
index 8f9f7468ddc..1dc1617bd6e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
@@ -1,8 +1,8 @@
 ---
 id: 64497da4062602213ecf32e7
-title: Paso 29
+title: Step 30
 challengeType: 0
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
index ac2fef85942..e018fb06bbf 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
@@ -1,8 +1,8 @@
 ---
 id: 64497de936a2f322327e5c58
-title: Paso 30
+title: Step 31
 challengeType: 0
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
index 04958edc2ae..9a418bcf2fb 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e0e5e5a2c2329785af4
-title: Paso 31
+title: Step 32
 challengeType: 0
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
@@ -16,7 +16,7 @@ Use the `&&` operator to add a second condition to your `if` statement that also
 You should use the `&&` operator to add a second condition to your `if` statement that also checks if the first character of `value` is `=`. You may use `[0]`, `.startsWith()`, or `.charAt(0)`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
index c7790ff5bd2..cea5d468a27 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e764135bd24b7960dd3
-title: Paso 32
+title: Step 33
 challengeType: 0
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
index f98542b1625..117a075e0f3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
@@ -1,8 +1,8 @@
 ---
 id: 6449842c6f6c84261075e4c9
-title: Paso 33
+title: Step 34
 challengeType: 0
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
index ce10f6799a8..f331b2e13dc 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
@@ -1,8 +1,8 @@
 ---
 id: 64498473a17adc26ef0ecc2d
-title: Paso 34
+title: Step 35
 challengeType: 0
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
index fd9172f708b..869aa786b1b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
@@ -1,8 +1,8 @@
 ---
 id: 6449849b78f43527be1e8a98
-title: Paso 35
+title: Step 36
 challengeType: 0
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
index 68dc382298a..379d979b83e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
@@ -1,8 +1,8 @@
 ---
 id: 64498542cab69128ab24e4de
-title: Paso 36
+title: Step 37
 challengeType: 0
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
index df5ce0b063f..db2048f5154 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
@@ -1,8 +1,8 @@
 ---
 id: 6449860d84c9e22cbd7b497c
-title: Paso 37
+title: Step 38
 challengeType: 0
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
index ca21d0dfcdb..1d217df30cf 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
@@ -1,8 +1,8 @@
 ---
 id: 6449863f592af72d9be0959e
-title: Paso 38
+title: Step 39
 challengeType: 0
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
index 3ee73e1987d..97250208fe7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
@@ -1,8 +1,8 @@
 ---
 id: 6449874d5191562eb3313b3f
-title: Paso 39
+title: Step 40
 challengeType: 0
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
index cc51e85eaab..f48039d757e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
@@ -1,8 +1,8 @@
 ---
 id: 6449876e7aae0d2f8257a497
-title: Paso 40
+title: Step 41
 challengeType: 0
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
index 6f35eea1e5d..6e3f9b611c6 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
@@ -1,8 +1,8 @@
 ---
 id: 64498b085028fc30a58bb6a7
-title: Paso 41
+title: Step 42
 challengeType: 0
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
index fdc8d90b383..d0a3366315c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0889c6ff4baa46ac1c50
-title: Paso 42
+title: Step 43
 challengeType: 0
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
index f09fcf74828..716a7d4ca9a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
@@ -1,8 +1,8 @@
 ---
 id: 646d09a07241aaab1e777080
-title: Paso 43
+title: Step 44
 challengeType: 0
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
index 37e7d9205d9..34987b9b603 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0a022da7bcabf3e3aca3
-title: Paso 44
+title: Step 45
 challengeType: 0
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
index ccd76222a6e..28ec9801c66 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0d20108440acc95a6b32
-title: Paso 45
+title: Step 46
 challengeType: 0
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
index f5fd55138bc..e8720b88a53 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0db5175974ad8633b71c
-title: Paso 46
+title: Step 47
 challengeType: 0
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
index 347a670899b..d5c1b76abff 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0e4636e14eae2bb3b992
-title: Paso 47
+title: Step 48
 challengeType: 0
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
index 29c884a1b5d..bce3cb02167 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1980018efaaec2b1c28b
-title: Paso 48
+title: Step 49
 challengeType: 0
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
index 30e74da2775..7f8eb0a90b8 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
@@ -1,8 +1,8 @@
 ---
 id: 646d19fc4705e4af65c3e688
-title: Paso 49
+title: Step 50
 challengeType: 0
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
index b32a05e0302..d076c93f8b1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1b96dd7ea4b0061458bc
-title: Paso 50
+title: Step 51
 challengeType: 0
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
index 2dcbd8cd12a..fb0d686e40d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
@@ -1,13 +1,13 @@
 ---
 id: 646d1cadf0d96ab0b7e12da4
-title: Paso 51
+title: Step 52
 challengeType: 0
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
 
-Because `elemValue` returns a function, your `addChars` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
+Because `elemValue` returns a function, your `addCharacters` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
 
 <!-- TODO: Explain further? -->
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
index a4b4e79b45f..c1ef0ae4591 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1d67f9261fb15a795588
-title: Paso 52
+title: Step 53
 challengeType: 0
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
index 3c42982c95c..81a967ea80d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1e531042dfb24da1f032
-title: Paso 53
+title: Step 54
 challengeType: 0
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
@@ -16,13 +16,13 @@ The callback function takes a few parameters. The first is the matched string. P
 You should pass an arrow function as the second argument to your `.replace()` method.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 Your arrow function should take a `match` parameter.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
index 34bbdc78f3b..4e0bdcafe1b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3141790b3cb337dd611a
-title: Paso 54
+title: Step 55
 challengeType: 0
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
index acd50e25072..a976d2e313d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
@@ -1,8 +1,8 @@
 ---
 id: 646d382c4d70ceb3dba1e830
-title: Paso 55
+title: Step 56
 challengeType: 0
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
index e2548ba29e2..7a1435a9e93 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
@@ -1,8 +1,8 @@
 ---
 id: 646d386a685620b49db4be76
-title: Paso 56
+title: Step 57
 challengeType: 0
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
index 211e73eccff..c6980b6b44a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38c326f3c8b54023de38
-title: Paso 57
+title: Step 58
 challengeType: 0
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
index a40dd80df00..0af42bfb322 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38f906b94cb5fe6ce7de
-title: Paso 58
+title: Step 59
 challengeType: 0
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
index 34a4c26b5df..daa12199dcb 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3952f6af37b6a1c241c2
-title: Paso 59
+title: Step 60
 challengeType: 0
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
index 0ba893e373c..e9f8b5ce15d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
@@ -1,8 +1,8 @@
 ---
 id: 646d39c156fe94b7482c3ab6
-title: Paso 60
+title: Step 61
 challengeType: 0
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
index 5892b3c82c3..3fa9bd07097 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3b27cd3c56b875256301
-title: Paso 61
+title: Step 62
 challengeType: 0
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
index 030d3528f8c..4e1043eecb1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3bc75fe0c9b972da3323
-title: Paso 62
+title: Step 63
 challengeType: 0
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
index abc1e99d1f6..ec294284249 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3c146e10b0ba222bb2a7
-title: Paso 63
+title: Step 64
 challengeType: 0
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
index 15b7818acef..747899bb3e3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d037872fbbae0a8ec0e
-title: Paso 64
+title: Step 65
 challengeType: 0
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
index 317c0391789..022a6c568cb 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d65be79c8bb9c7df9ff
-title: Paso 65
+title: Step 66
 challengeType: 0
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
index 322956a25f7..9615d7f929a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d80c3b4aebc4103618e
-title: Paso 66
+title: Step 67
 challengeType: 0
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
index e0ccc266b6f..196385d39b2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3da8501e15bcd355ba1d
-title: Paso 67
+title: Step 68
 challengeType: 0
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
index 8104963a12b..3cb7c61d53f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e135ab3abbdbfe5c899
-title: Paso 68
+title: Step 69
 challengeType: 0
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
index e28e1d846a7..8c653ee86f4 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e64b15f92be6e61704e
-title: Paso 69
+title: Step 70
 challengeType: 0
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str
 Your callback function should use bracket notation to access the property of the `infixToFunction` object that matches the value of the `operator` parameter.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
index e7a5a6c9e8a..cd6d06d7e99 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3ee7b17ae3bf48610033
-title: Paso 70
+title: Step 71
 challengeType: 0
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
@@ -14,19 +14,19 @@ dashedName: step-70
 Your callback function should return the result of calling `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(/);
 ```
 
 You should pass `arg1` as the first argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1/);
 ```
 
 You should pass `arg2` as the second argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
index df8248200c5..2145e640b31 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f1fd12f76c02c823bb8
-title: Paso 71
+title: Step 72
 challengeType: 0
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
@@ -16,13 +16,13 @@ Wrap each of your `infixToFunction[operator]` arguments in a `parseFloat()` call
 You should wrap `arg1` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
 ```
 
 You should wrap `arg2` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
index 23d8a3da5a4..f9fcf26f42e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f718b5f8dc102cd528e
-title: Paso 72
+title: Step 73
 challengeType: 0
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
index e1c90041eb9..d7bdc37d7b2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
@@ -1,8 +1,8 @@
 ---
 id: 646d404259f512c1a9e86ac1
-title: Paso 73
+title: Step 74
 challengeType: 0
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
index e3f1a14c9df..167d450138d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40c543943ec250039682
-title: Paso 74
+title: Step 75
 challengeType: 0
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
index ada2fea6fa4..660a596da8e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40fe4b7b50c30c2b4cd8
-title: Paso 75
+title: Step 76
 challengeType: 0
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
index 428f282d323..0bc08a4012e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
@@ -1,8 +1,8 @@
 ---
 id: 646d41e23b583fc3b8cc4579
-title: Paso 76
+title: Step 77
 challengeType: 0
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
index effffa47192..16562b4bb2f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
@@ -1,8 +1,8 @@
 ---
 id: 646d423fade4a9c4636acd13
-title: Paso 77
+title: Step 78
 challengeType: 0
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
index 28a267bd159..efc5d0ffc18 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
@@ -1,8 +1,8 @@
 ---
 id: 646d42f58deb2fc52adc6611
-title: Paso 78
+title: Step 79
 challengeType: 0
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
index 4874023bf46..02383be897f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d43587d926bc5b6cb2e50
-title: Paso 79
+title: Step 80
 challengeType: 0
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
index 7008d7164ff..1ea064565a1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d448479c8fdc8dcec868c
-title: Paso 80
+title: Step 81
 challengeType: 0
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
index 8d8c5cc8ce7..b6fe908bbf8 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d44da986f2bc9b72f5fe2
-title: Paso 81
+title: Step 82
 challengeType: 0
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
index 83d26bea04f..3d6821dadd1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
@@ -1,8 +1,8 @@
 ---
 id: 646d451c2e44afca71b67818
-title: Paso 82
+title: Step 83
 challengeType: 0
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
index 87a980c46fc..18d0465bd29 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4554721d43cb19a68bc4
-title: Paso 83
+title: Step 84
 challengeType: 0
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
@@ -28,13 +28,13 @@ assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*cons
 Your `apply` function should access the property of the `spreadsheetFunctions` object that matches the `fn` value.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn/);
 ```
 
 Your `apply` function should call the `.toLowerCase()` method on `fn` in the property access.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]/);
 ```
 
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
index 5f57e5e9a41..b14d113cdfd 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45b739da5ecbf830c108
-title: Paso 84
+title: Step 85
 challengeType: 0
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Your `apply` function is returning the spreadsheet function, but not actually ap
 Your `apply` function should call the `spreadsheetFunctions[fn.toLowerCase()]` function.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(/);
 ```
 
 You should pass a `toNumberList()` call to your `spreadsheetFunctions[fn.toLowerCase()]` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(/);
 ```
 
 You should pass `args` to your `toNumberList()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
index a12de3f7edd..95734fb4ffe 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45ee725632cca2555146
-title: Paso 85
+title: Step 86
 challengeType: 0
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Now your `applyFunction` needs to return a result. Return the result of calling
 Your `applyFunction` function should return the result of calling the `.replace()` method on `str2`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(/);
 ```
 
 You should pass `functionCall` as the first argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall/);
 ```
 
 You should pass an empty arrow function as the second argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
 ```
 
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
index 9b28e01c77d..8eb18bbd464 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4626420eeecd51f241c2
-title: Paso 86
+title: Step 87
 challengeType: 0
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Remember to make `fn` lower case.
 Your callback function should have `match` as the first parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
 ```
 
 Your callback function should have `fn` as the second parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
 ```
 
 Your callback function should have `args` as the third parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
 ```
 
 Your callback function should use an implicit return.
 
 ```js
-assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
+assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
 ```
 
 Your callback function should return the result of calling the `.hasOwnProperty()` method on the `spreadsheetFunctions` object.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
 ```
 
 You should pass `fn` to the .`hasOwnProperty()` method.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn/);
 ```
 
 You should call the `.toLowerCase()` method on `fn`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
index 5e98e85557c..1fd62328533 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d467c6994f4ce0dc416a4
-title: Paso 87
+title: Step 88
 challengeType: 0
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
@@ -14,31 +14,31 @@ Use the ternary operator to turn your `.hasOwnProperty()` call into the conditio
 Your callback function should use ternary syntax.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
 ```
 
 If the ternary condition is true, your callback function should return the result of calling `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\s*\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\s*\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
 ```
 
 You should pass `fn` as the first argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
 ```
 
 You should pass `args` as the second argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
 ```
 
 If the ternary is false, you should return `match`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
index a64fc620270..222c5c8a20d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
@@ -1,8 +1,8 @@
 ---
 id: 646d46c03e7d02cecb30f021
-title: Paso 88
+title: Step 89
 challengeType: 0
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
@@ -14,25 +14,25 @@ Now you can start applying your function parser to your `evalFormula` logic. Dec
 You should declare a `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
 ```
 
 You should use `const` to declare your `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*const\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*const\s+functionExpanded\s*=\s*/);
 ```
 
 You should assign the `functionExpanded` variable the result of calling your `applyFunction` function.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
 ```
 
 You should pass `cellExpanded` to your `applyFunction` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
index 21f6215fe01..48b1cab80ed 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4717a689e1cfa232e357
-title: Paso 69
+title: Step 90
 challengeType: 0
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Use a ternary to check if `functionExpanded` is equal to the original string `x`
 Your `evalFormula` function should use the `return` keyword.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
 ```
 
 Your `return` statement should check if `functionExpanded` is equal to `x`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
 ```
 
 Your `return` statement should use a ternary operator.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
 ```
 
 If the ternary condition is true, your `evalFormula()` should return `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
 ```
 
 If the ternary condition is false, your `evalFormula()` should return the result of calling `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
 ```
 
 You should pass `functionExpanded` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
 ```
 
 You should pass `cells` as the second argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
index f6d4694e981..c1249111d86 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4769ba65f1d05ef6b634
-title: Paso 90
+title: Step 91
 challengeType: 0
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
@@ -16,19 +16,19 @@ Inside your `if` statement, set the `value` of the `element` to be the result of
 You should update the `value` property of `element` in your `if` block.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
 ```
 
 You should assign the `value` property the result of calling your `evalFormula()` function.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
 ```
 
 You should not pass any arguments to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
index f531f758d14..9ef5920b36a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
@@ -1,8 +1,8 @@
 ---
 id: 646d47c8f58107d10f1e5106
-title: Paso 91
+title: Step 92
 challengeType: 0
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
@@ -14,19 +14,19 @@ The first argument for your `evalFormula` call needs to be the contents of the c
 You should pass `value` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
 ```
 
 You should call the `.slice()` method on the `value` argument.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(/);
 ```
 
 You should pass the number `1` as the argument to your `.slice()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(\s*1\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
index 16f2ee84cd7..c2b4d2b8c71 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4813c17b37d1e261a566
-title: Paso 92
+title: Step 93
 challengeType: 0
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
@@ -14,19 +14,19 @@ You can quickly get all cells from your page by getting the `#container` element
 For the second parameter of your `evalFormula()` call, you should call the `.getElementById()` method of the `document` object.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
 ```
 
 You should pass `container` as the argument to your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
 ```
 
 You should access the `children` property of the result of your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
index 3c91ee02633..ac6184b9d56 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
@@ -1,8 +1,8 @@
 ---
 id: 646d486aec20f7d2a581cc36
-title: Paso 93
+title: Step 94
 challengeType: 0
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
@@ -14,7 +14,7 @@ Unfortunately, that `children` property is returning a collection of elements, w
 You should wrap your `document.getElementById('container').children` in `Array.from()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
index 0e95c77a0b5..98ffeb00088 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
@@ -1,8 +1,8 @@
 ---
 id: 646d48b936802fd34c3f05af
-title: Paso 94
+title: Step 95
 challengeType: 0
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
index 72610632686..a4c682f9df4 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d498c8ebc31d3f753b22e
-title: Paso 95
+title: Step 96
 challengeType: 0
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
index ca641977529..43c6ebe6441 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
@@ -1,8 +1,8 @@
 ---
 id: 646d49bfff9079d4b38df115
-title: Paso 96
+title: Step 97
 challengeType: 0
-dashedName: step-96
+dashedName: step-97
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
index 5ae5aeb4f76..0e9787dff11 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a07a8fb14d55cd70e09
-title: Paso 97
+title: Step 98
 challengeType: 0
-dashedName: step-97
+dashedName: step-98
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
index 1f9aea8c04e..983d30989b0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a5b32a1cad6165df286
-title: Paso 99
+title: Step 100
 challengeType: 0
-dashedName: step-99
+dashedName: step-100
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
index cf7b61e5e41..34ae3e371aa 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a8dbc04c6d6bb0001f8
-title: Paso 100
+title: Step 101
 challengeType: 0
-dashedName: step-100
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
index bc3156ae945..b221e737fdb 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4ab9b3b4c5d74fdd2154
-title: Paso 101
+title: Step 102
 challengeType: 0
-dashedName: step-101
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
index 6eaa499b7c3..89e89d3ac90 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4b3d80ea98d824c8a4f9
-title: Paso 102
+title: Step 103
 challengeType: 0
-dashedName: step-102
+dashedName: step-103
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
index b7b94cdf729..eb5424ffa9d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
@@ -1,8 +1,8 @@
 ---
 id: 6491d38f5b09a021c4b5d5fe
-title: Paso 98
+title: Step 99
 challengeType: 0
-dashedName: step-98
+dashedName: step-99
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
new file mode 100644
index 00000000000..3a606f8e1cf
--- /dev/null
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
@@ -0,0 +1,104 @@
+---
+id: 65ae458e23954c3469e0c209
+title: Step 18
+challengeType: 0
+dashedName: step-18
+---
+
+
+# --description--
+
+In earlier projects you learned about the `setAttribute` method. Another way to update an attribute in JavaScript is to use the following syntax:
+
+```js
+el.attribute = value;
+```
+
+The property names for hyphenated HTML attribute values, such as `aria-label`, follow camel case, becoming `ariaLabel`.
+
+```js
+el.ariaLabel = "Aria Label Value";
+```
+
+Set the `aria-label` attribute for the `input` element to the same value as the `id` attribute.
+
+
+# --hints--
+
+You should have an `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=/);
+```
+
+
+You should assign `letter + number` to `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=\s*letter\s*\+\s*number/);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="./styles.css" />
+    <title>Functional Programming Spreadsheet</title>
+  </head>
+  <body>
+    <div id="container">
+      <div></div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+#container {
+  display: grid;
+  grid-template-columns: 50px repeat(10, 200px);
+  grid-template-rows: repeat(11, 30px);
+}
+
+.label {
+  background-color: lightgray;
+  text-align: center;
+  vertical-align: middle;
+  line-height: 30px;
+}
+```
+
+```js
+const range = (start, end) => Array(end - start + 1).fill(start).map((element, index) => element + index);
+const charRange = (start, end) => range(start.charCodeAt(0), end.charCodeAt(0)).map(code => String.fromCharCode(code));
+
+window.onload = () => {
+  const container = document.getElementById("container");
+  const createLabel = (name) => {
+    const label = document.createElement("div");
+    label.className = "label";
+    label.textContent = name;
+    container.appendChild(label);
+  }
+  const letters = charRange("A", "J");
+  letters.forEach(createLabel);
+  range(1, 99).forEach(number => {
+     createLabel(number);
+--fcc-editable-region--
+    letters.forEach(letter => {
+     const input = document.createElement("input");
+     input.type = "text";
+     input.id = letter + number;
+
+    })   
+--fcc-editable-region--
+  })
+}
+```
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
index d17f673b20f..b110ceccc52 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
@@ -16,7 +16,7 @@ Now you should be able to roll the dice a few times and see the values update.
 You should call your `updateStats` function inside the `else` clause.
 
 ```js
-assert.match(code, /updateStats\(\)/)
+assert.match(code, /updateStats\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
index b41746e8217..27de59631e2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
@@ -28,7 +28,7 @@ assert.match(code, /const\s+updateRadioOption\s*=\s*\(.*\)\s*=>\s*{\s*[\s\S]*};?
 Your `updateRadioOption` function should take `optionNode` and `score` as parameters.
 
 ```js
-assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\)\s*=>\s*{\s*[\s\S]*};?/)
+assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\s*\)\s*=>\s*{\s*[\s\S]*};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
index d4872c42bba..f8d85fb41b7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
@@ -14,7 +14,7 @@ To enable the radio buttons, you should set the `disabled` property on `scoreInp
 You should assign `false` to `scoreInputs[optionNode].disabled`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.disabled\s*=\s*false/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.disabled\s*=\s*false/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
index 70f64d51188..5e4203d5200 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
@@ -14,7 +14,7 @@ Next, you will need to update the radio button's `value` to the current `score`.
 You should assign the `score` variable to `scoreInputs[optionNode].value`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.value\s*=\s*score/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.value\s*=\s*score/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
index 9b83b10b317..082008bca37 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
@@ -14,7 +14,7 @@ To display the current score, update the text content for the `span` element nex
 You should set the `textContent` property for `scoreSpans[optionNode]` to the following template literal: `, score = ${score}`.
 
 ```js
-assert.match(code, /scoreSpans\[\s*optionNode\s*\]\.textContent\s*=\s*`, score = \${score}`;?/);
+assert.match(code, /scoreSpans\s*\[\s*optionNode\s*\]\s*\.textContent\s*=\s*`, score = \${score}`;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
index 05f9080f8e6..a4875bda45a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
@@ -22,7 +22,7 @@ assert.match(code, /updateRadioOption\(.*\);?/);
 You should have the arguments of `0` and `10` for the `updateRadioOption` function.
 
 ```js
-assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
index c08ede14d2d..bfe63b52450 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
@@ -14,7 +14,7 @@ Now that you have verified the `updateRadioOption` function works, remove the fu
 You should remove the `updateRadioOption` function call from your `else` clause.
 
 ```js
-assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
index ebb61c98191..8ac2d3fa1c0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
@@ -18,19 +18,19 @@ Below your `if` statement, include an `else` clause that assigns `1` to `counts[
 You should have an `if` statement with a condition of `counts[num]`.
 
 ```js
-assert.match(code, /if\s*\(\s*counts\[num\]\s*\)/);
+assert.match(code, /if\s*\(\s*counts\s*\[\s*num\s*\]\s*\)/);
 ```
 
 You should use the `++` operator to increment the value of `counts[num]` by `1` inside your `if` statement.
 
 ```js
-assert.match(code, /counts\[num\]\s*\+\s*=\s*1|counts\[num\]\+\+/);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*\+\s*=\s*1|counts\s*\[\s*num\s*\]\s*\+\+/);
 ```
 
 You should assign `1` to `counts[num]` inside your `else` clause.
 
 ```js
-assert.match(code, /else\s*\{\s*counts\[num\]\s*=\s*1\s*;?\s*\}/);
+assert.match(code, /else\s*\{\s*counts\s*\[\s*num\s*\]\s*=\s*1\s*;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
index f16489f28be..df15d6d0249 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
@@ -22,7 +22,7 @@ assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s
 You should assign `counts[num]` to your `count` variable.
 
 ```js
-assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\[num\]\s*;?\s*}/);
+assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\s*\[\s*num\s*\]\s*;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
index 2981d61fd89..a5a3d8b5c9a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
@@ -16,7 +16,7 @@ Now, try rolling the dice again and you should see that the previous score `inpu
 You should call the `resetRadioOption` function inside the `rollDiceBtn` callback function.
 
 ```js
-assert.match(code, /resetRadioOption\(\);?/);
+assert.match(code, /resetRadioOption\(\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
index 756c731ea3e..071b001b52e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
@@ -22,7 +22,7 @@ assert.isFunction(resetGame);
 You should use arrow syntax for your `resetGame` function.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*}\s*;?/);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
index 0ffdd5619e8..f71854c1a0c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
@@ -24,25 +24,25 @@ assert.match(code, /diceValuesArr\s*=\s*\[\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s
 You should reassign the `score` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `totalScore` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `rolls` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `round` variable to `1`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
index 61c8a632f17..1dd65bd4457 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
@@ -14,13 +14,13 @@ To reset each of the dice values to show `0`, apply a `forEach` method to the `l
 You should call the `forEach` method of the `listOfAllDice` variable.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
 ```
 
 For your callback function, you should use `dice` and `index` as parameters.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
index 25fe550946f..384a39a3230 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
@@ -14,13 +14,13 @@ Inside your callback function, update the `dice` text content by assigning it th
 You should access the `textContent` property of the `dice` parameter.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
 ```
 
 You should assign `diceValuesArr[index]` to `dice.textContent`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
index 3ae1c34b903..33fb771e35b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
@@ -20,25 +20,25 @@ Lastly, update the `currentRoundText` text content by assigning it the `round` v
 You should assign `totalScore` to `totalScoreText.textContent`.
 
 ```js
-assert.match(code, /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
+assert.match(resetGame.toString(), /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
 ```
 
 You should use the `innerHTML` property to set the `scoreHistory` to an empty string.
 
 ```js
-assert.match(code, /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
+assert.match(resetGame.toString(), /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
 ```
 
 You should assign `rolls` to `currentRoundRollsText.textContent`.
 
 ```js
-assert.match(code, /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
+assert.match(resetGame.toString(), /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
 ```
 
 You should assign `round` to `currentRoundText.textContent`.
 
 ```js
-assert.match(code, /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
+assert.match(resetGame.toString(), /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
index 55e39adc08f..9bc406e2c01 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
@@ -16,7 +16,7 @@ Assign the entire result of your `ternary` to `counts[num]`.
 You should assign `counts[num] ? counts[num] + 1 : 1` to `counts[num]` in the `for...of` loop.
 
 ```js
-assert.match(code, /counts\[num\]\s*=\s*counts\[num\]\s*\?\s*counts\[num\]\s*\+\s*1\s*:\s*1\s*;?/s);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*=\s*counts\s*\[\s*num\s*\]\s*\?\s*counts\s*\[\s*num\s*\]\s*\+\s*1\s*:\s*1\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
index 4c52e1dca13..5f966016d20 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasThreeOfAKind\s*=/);
 You should assign `Object.values(counts)` to your `hasThreeOfAKind` variable.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(3)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\)\.includes\(3\)\s*;?/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*3\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
index 94dbd416bd5..1ae644169e5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasPair\s*=/);
 You should assign `Object.values(counts)` to your `hasPair` variable.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(2)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\)\.includes\(2\)\s*;?/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*2\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
index 55b31a54877..9f9757b20ad 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
@@ -36,7 +36,7 @@ assert.match(code, /const\s+sortedNumbersArr\s*=\s*arr\.sort\(.*\);?/);
 Your callback function should use `a` and `b` for the parameters and implicitly return `a - b`.
 
 ```js
-assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(a,\s*b\)\s*=>\s*a\s*-\s*b\s*\));?/);
+assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(\s*a,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\));?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
index c12d14d20b4..6f31cd14f5e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+smallStraightsArr\s*=?\s*;?/);
 You should store the strings `1234`, `2345` and `3456` in an array and assign it to your `smallStraightsArr`.
 
 ```js
-assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\];?/);
+assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
index 9c02dc3a98b..b0fc959d11a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+largeStraightsArr\s*=?\s*;?/);
 You should store the strings `12345` and `23456` in an array and assign it to your `largeStraightsArr`.
 
 ```js
-assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\];?/);
+assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
index 88d841f4430..ef3383d2386 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `smallStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `3` and `30` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
index 0b3a1ce3f1d..11ef9653b93 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `largeStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `4` and `40` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
index be114220700..d9048e3e778 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
@@ -16,7 +16,7 @@ Inside the `animate` function, create an `if` statement where the condition chec
 You should have an `if` statement that checks if the right key was pressed and the player's `x` position is less than 400.
 
 ```js
-assert.match(animate.toString(), /keys\.rightKey\.pressed\s*&&\s*player\.position\.x\s*<\s*400/);
+assert.match(animate.toString(), /keys\.rightKey\.(pressed|pressed\s*===\s*true)\s*&&\s*player\.position\.x\s*<\s*400/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
index 1bf7c8afa24..dcb0d55bcd3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
@@ -30,7 +30,7 @@ assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*
 You should call the `draw` method on each `platform`.
 
 ```js
-assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\)\s*;?\s*}?\s*\);?/);
+assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\s*\)\s*;?\s*}?\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
index 80e0971d8c1..d96ec1c8b43 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
@@ -26,7 +26,7 @@ Your callback function should have a `platform` parameter.
 
 ```js
 const splitter = code.split("platform.position.x += 5;")
-assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\);?/);
+assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
index 8dbcfc0e937..b7f42446ebe 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
@@ -9,17 +9,17 @@ dashedName: step-78
 
 Inside the callback function, create a new `const` variable called `collisionDetectionRules` and assign it an empty array.
 
-Inside that array, add a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+Inside that array, add a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 # --hints--
 
 You should have a `const` variable called `collisionDetectionRules` that is assigned an empty array.
 
 ```js
-assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\];?/);
+assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\s*\]\s*;?/);
 ```
 
-You should have a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+You should have a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 ```js
 assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*player\.position\.y\s*\+\s*player\.height\s*<=\s*platform\.position\.y\s*,?\s*]\s*;?/);
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
index ba5031595da..80d7e3356f0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
@@ -14,7 +14,7 @@ Inside that array, add a boolean expression that checks if the player's `x` posi
 You should have a boolean expression that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
index 7362335e77a..0f042336c49 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
@@ -14,7 +14,7 @@ Below that boolean expression, add another boolean expression that checks if the
 You should have a boolean expression that checks if the player's `x` position is less than or equal to the sum of the platform's `x` position and the platform's width minus one third of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
index 5bf77afcc3b..a8a426e041e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
@@ -16,21 +16,21 @@ Below that, add another boolean expression that checks if the player's `y` posit
 You should not alter the existing `platformDetectionRules` array and its content.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position plus the player's height is greater than or equal to the platform's `y` position.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position is less than or equal to the sum of the platform's `y` position plus the platform's height.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\]\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
index c0e236e5c63..ebe3b851fc1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
@@ -19,21 +19,21 @@ Your `CheckPoint` class should have a `draw` method.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{/);
 ```
 
 Your `draw` method should have a `fillStyle` property.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
 ```
 
 Your `draw` method should have a `fillRect` method.
 
 ```js
 const splitter = code.split('#f1be32')
-assert.match(splitter[1], /ctx\.fillRect\(this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\);?/);
+assert.match(splitter[1], /ctx\.fillRect\(\s*this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
index 724aa3ccc81..910205fcf90 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
@@ -25,14 +25,14 @@ assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\([^
 Your callback function should have a `checkpoint` parameter.
 
 ```js
-assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*[^)]*\s*\)\s*;?/);
+assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*[^)]*\s*\)\s*;?/);
 
 ```
 
 You should implicitly return a new `CheckPoint` instance.
 
 ```js
-assert.match(code, /\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
+assert.match(code, /\s*checkpointPositions\.map\s*\(\s*(\(checkpoint\s*\)|checkpoint)\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
index f627e8e970e..de17caaba8b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
@@ -24,13 +24,13 @@ assert.match(code, /\bcheckpoints\b\s*\.\s*forEach\s*\(/s);
 You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*checkpoint\s*=>\s*{/s);
+assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*{?/s);
 ```
 
 You should call the `draw` method on each `checkpoint` inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\.forEach\s*\(\s*checkpoint\s*=>\s*{\s*checkpoint\.draw\(\s*\);?\s*}\s*\);?/s);
+assert.match(code, /\s*checkpoints\.forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*(\{\s*checkpoint\.draw\(\s*\)\s*;?\s*\}|checkpoint\.draw\(\s*\))\s*\)\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
index c01f693f29a..d204d19161c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
@@ -24,7 +24,7 @@ You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
 const splitter = code.split("if (keys.rightKey.pressed && isCheckpointCollisionDetectionActive)")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(?checkpoint\)?\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*\{/);
 ```
 
 You should use the subtraction assignment operator to subtract 5 from the `checkpoint`'s `x` position.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
index f1be8c13092..d8b1de143b7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
@@ -42,7 +42,7 @@ assert.match(code, /\s*setTimeout\s*\(\s*\(\s*\)\s*=>[^,]*,\s*2000\s*\)/s);
 Your callback function should set the `checkpointScreen` `display` property to `none`.
 
 ```js
-assert.match(code, /\s*if\s*\(isCheckpointCollisionDetectionActive\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
+assert.match(code, /\s*if\s*\(\s*isCheckpointCollisionDetectionActive\s*\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
index a6eeffea3e5..e8e9fe730d5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
@@ -24,7 +24,7 @@ Your callback function should have a `checkpoint` parameter and `index`.
 
 ```js
 const splitter = code.split("player.velocity.y = gravity;")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(checkpoint,\s*index\)\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*\(\s*checkpoint,\s*index\s*\)\s*=>\s*\{/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
index 982720cca6d..abbe7c44d68 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
@@ -14,7 +14,7 @@ Inside the `if` statement, call the `claim` method on the `checkpoint` object.
 You should call the `claim()` method on the `checkpoint` object.
 
 ```js
-assert.match(code, /checkpoint\.claim\(\);?/)
+assert.match(code, /checkpoint\.claim\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
index d09acbd2901..71fafcee36c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
@@ -24,7 +24,7 @@ assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\
 You should call the `showCheckpointScreen` function and pass in "You reached the final checkpoint!" as an argument.
 
 ```js
-assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\);?/)
+assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(\s*("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\s*\);?/)
 ```
 
 You should call the `movePlayer` function and pass in the provided arguments.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
index 0ed010d062d..047aabdab94 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
@@ -18,37 +18,37 @@ Begin by accessing the `task-form`, `confirm-close-dialog`, and `open-task-form-
 You should use `getElementById()` to access the `task-form` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should assign the `task-form` element to the variable `taskForm`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `confirm-close-dialog` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should assign the `confirm-close-dialog` element to the variable `confirmCloseDialog`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `open-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `open-task-form-btn` element to the variable `openTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
index 2d0a3231bb4..130317dfd16 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
@@ -14,37 +14,37 @@ You need to access more elements with the `getElementById()` method. This time y
 You should use `getElementById()` to access the `close-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `close-task-form-btn` element to the variable `closeTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `add-or-update-task-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should assign the `add-or-update-task-btn` element to the variable `addOrUpdateTaskBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `cancel-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 You should assign the `cancel-btn` element to the variable `cancelBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
index 828aad72f35..a7e02a021ad 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
@@ -14,37 +14,37 @@ Next, access the `discard-btn`, `tasks-container`, and `title-input` elements us
 You should use `getElementById()` to access the `discard-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should assign the `discard-btn` element to the variable `discardBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `tasks-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should assign the `tasks-container` element to the variable `tasksContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `title-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 You should assign the `title-input` element to the variable `titleInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
index d4ea72c18c6..c5aadd39fc7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
@@ -14,25 +14,25 @@ The last set of elements you need to get from the HTML file are the `date-input`
 You should use `getElementById()` to access the `date-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should assign the `date-input` element to the variable `dateInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `description-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 You should assign the `description-input` element to the variable `descriptionInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
index 04b0fb07f19..4e671b473e1 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
@@ -13,16 +13,40 @@ Use `let` to create a `currentTask` variable and set it to an empty object. This
 
 # --hints--
 
-You should create a `taskData` constant set to an empty array.
+You should have a `const` variable called `taskData`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=/)
 ```
 
-You should use `let` to create an empty `currentTask` object.
+You should assign an array to your `taskData` constant.
 
 ```js
-assert.match(code, /let\s+currentTask\s*=\s*\{\};?/)
+assert.isArray(taskData);
+```
+
+Your `taskData` array should be empty.
+
+```js
+assert.isEmpty(taskData);
+```
+
+You should use `let` to create a `currentTask` variable.
+
+```js
+assert.match(code, /let\s+currentTask/);
+```
+
+You should assign an object to your `currentTask` variable.
+
+```js
+assert.isObject(currentTask);
+```
+
+Your `currentTask` object should be empty.
+
+```js
+assert.isEmpty(currentTask);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
index d5525465d44..a0fad6de91c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
@@ -7,9 +7,15 @@ dashedName: step-7
 
 # --description--
 
-Add a `click` event listener to the `closeTaskFormBtn` variable, then use the `showModal()` method on your `confirmCloseDialog` variable. This will display a modal with the `Discard` and `Cancel` buttons.
+The HTML `dialog` element has a `showModal()` method that can be used to display a modal dialog box on a web page.
 
-`showModal()` is a method associated with the HTML `dialog` element. It is used to display a modal dialog box on a web page.
+```js
+dialogElement.showModal();
+```
+
+Add an event listener to the `closeTaskFormBtn` variable and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `showModal()` method on the `confirmCloseDialog` element. This will display a modal with the `Discard` and `Cancel` buttons.
 
 # --hints--
 
@@ -22,13 +28,13 @@ assert.match(code, /closeTaskFormBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `showModal()` method on `confirmCloseDialog`.
+Your event listener's callback function should call the `showModal()` method on the `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1,\s*\(.*\)\s*=>\s*{?\s*confirmCloseDialog\.showModal\(\);?\s*}?\s*\);?/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1,\s*\(.*\)\s*=>\s*(\{\s*confirmCloseDialog\.showModal\(\s*\)\s*;?\s*\}|confirmCloseDialog\.showModal\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
index eb34aa4bbe5..5fa6b55bb3d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
@@ -7,11 +7,15 @@ dashedName: step-8
 
 # --description--
 
-If the user clicks the `Cancel` button, you want to cancel the process (close the modal showing the two buttons) so the user can continue editing.
+If the user clicks the `Cancel` button, you want to cancel the process and close the modal so the user can continue editing. The HTML `dialog` element has a `close()` method that can be used to close a modal dialog box on a web page.
 
-Add a `click` event listener to the `cancelBtn` element, then use the `close()` method on the `confirmCloseDialog` variable.
+```js
+dialogElement.close();
+```
 
-`close()` is a method of the window object you can use to close the current window, or a modal you create with the `dialog` element.
+Add an event listener to the `cancelBtn` element and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `close()` method on the `confirmCloseDialog` element.
 
 # --hints--
 
@@ -24,13 +28,13 @@ assert.match(code, /cancelBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `close()` method on `confirmCloseDialog`. Don't use curly braces.
+Your event listener's callback function should call the `close()` method on `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1\,\s*\(\)\s*\s*=>\s*confirmCloseDialog\.close\(\)\s*\);?/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1\s*\,\s*\(\s*\)\s*=>\s*(\{\s*confirmCloseDialog\.close\(\s*\)\s*;?\s*\}|confirmCloseDialog\.close\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
index 30566799cb0..81880e1f730 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
@@ -28,19 +28,19 @@ assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1/)
 You should use arrow syntax to set your event listener to an empty pair of curly braces.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 Your event listener should use the `close()` method on `confirmCloseDialog`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?/)
 ```
 
 Your event listener should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
index 572c186ffdf..847a4f78540 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
@@ -22,19 +22,19 @@ assert.match(code, /taskForm\.addEventListener\(/)
 Your event listener should listen for a `submit` event.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1/)
 ```
 
 You should use arrow syntax to set your event listener to an empty pair of curly braces with `e` as the parameter.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
 ```
 
 You should use the `e.preventDefault()` method to stop the browser from reloading the page.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\);?/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
index 281e51ea8ab..44b12bb1492 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
@@ -35,13 +35,13 @@ assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 You should pass in `item` as the parameter of the arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === currentTask.id`.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
index 51337758eed..8c0b4f73a43 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
@@ -30,19 +30,19 @@ assert.match(code, /const\s+taskObj\s*=\s*\{\s*id/)
 You should use template strings to get `titleInput.value` as the value of your `id` key and convert it to lowercase.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)/)
 ```
 
 You should use `.split(' ')` on `titleInput.value.toLowerCase()`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(('|")\s{1}\1\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)/)
 ```
 
 You should use `.join('-')` on `titleInput.value.toLowerCase().split(' ')`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
index bd05f2f617f..136f6e0e266 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
@@ -20,13 +20,13 @@ Create an `if` statement with the condition `dataArrIndex === -1`. Within the `i
 You should create an `if` statement with the condition `dataArrIndex === -1`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{/)
 ```
 
 Your `if` statement should have `taskData.unshift(taskObj)` in it's body.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}/)
 ```
 
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
index 917ba2c52ac..ac7b162ddd9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
@@ -26,7 +26,7 @@ assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*(\s*\{?\(\s*ta
 You should use addition assignment to set the `innerHTML` of `tasksContainer` to an empty pair of backticks.
 
 ```js
-assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\)?\s*\}?)/)
+assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\s*\)?\s*\}?)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
index 2fec3ee6af7..306ed4d21b3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
@@ -15,7 +15,7 @@ You should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("taskData.forEach")[1].split("});")
-assert.match(splitter[0], /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(splitter[0], /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
index 0e15ed507d9..9f1fc775947 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
@@ -18,13 +18,13 @@ Use arrow syntax to create a `reset` function and set it to a pair of curly brac
 You should use `const` and arrow syntax to create a `reset` function.
 
 ```js
-assert.match(code, /const\s+reset\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+reset\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 Your `reset` function should be empty.
 
 ```js
-assert.match(reset.toString(), /\(\)\s*\{\s*\}/);
+assert.match(reset.toString(), /\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
index 58a8e48cd8f..3b52943b863 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
@@ -34,7 +34,7 @@ assert.match(reset.toString(), /descriptionInput\.value\s*=\s*('|")\1;?/)
 You should use `classList` to toggle the class `hidden` on `taskForm`
 
 ```js
-assert.match(reset.toString(), /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(reset.toString(), /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 You should set `currentTask` to an empty object.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
index be4fd62ee8d..cd7a89da62e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the `hidden` class on `taskForm`.
 
 ```js
 const splitter = code.split('<button type="button" class="btn">Delete</button>')
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /reset\(\)/)
+assert.match(code, /reset\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
index 421d4117003..d9e01c49ca8 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("confirmCloseDialog.close();")
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /confirmCloseDialog\.close\(\);?\s*reset\(\);?/)
+assert.match(code, /confirmCloseDialog\.close\(\s*\);?\s*reset\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
index cbcd33207ab..03475c19aad 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
@@ -16,7 +16,7 @@ To begin, within the `closeTaskFormBtn` event listener, create a `formInputsCont
 You should use `const` to create a variable `formInputsContainValues` with the value `titleInput.value || dateInput.value || descriptionInput.value;`
 
 ```js
-assert.match(code, /const\s+formInputsContainValues\s*=\s*titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value;?/)
+assert.match(code, /const\s+formInputsContainValues\s*=\s*(titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value|titleInput\.value\s*!==\s*null\s*\|\|\s*dateInput\.value\s*!==\s*null\s*\|\|\s*descriptionInput\.value\s*!==\s*null)\;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
index d346d93bc23..98e751d3e26 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
@@ -14,25 +14,25 @@ Create an `if` statement to check if `formInputsContainValues` is true. If `form
 You should create an `if` statement with the condition `formInputsContainValues`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{/)
 ```
 
 The `if` block of your `if` statement should contain `confirmCloseDialog.showModal();`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `reset()` function in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{\s*reset\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{\s*reset\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
index cf6326c854d..5840c5deae8 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
@@ -16,7 +16,7 @@ Use arrow syntax to create an `addOrUpdateTask` function. Then move the `dataArr
 You should use `const` and arrow syntax to create an `addOrUpdateTask` function.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should move the `dataArrIndex` variable into the `addOrUpdateTask` function.
@@ -31,7 +31,7 @@ You should move the `taskObj` object into the `addOrUpdateTask` function.
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?/)
 ```
 
-You should move the `if` statement with the condition `dataArrIndex === 1` into your `addOrUpdateTask` function.
+You should move the `if` statement with the condition `dataArrIndex === -1` into your `addOrUpdateTask` function.
 
 ```js
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s*===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?\s*if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\)\s*;?\s*\}\s*\}\s*;?/)
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
index 5e899072977..5506997c01b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
@@ -14,13 +14,13 @@ Use arrow syntax to create an `updateTaskContainer` function. Then move the `tas
 You should use `const` and arrow syntax to create a `updateTaskContainer` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 You should move `taskData.forEach()` and its content into the `updateTaskContainer()` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\{\s*id,\s*title,\s*date,\s*description\s*\}\)\s*=>\s*{\s*\(tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\)\s*}\s*\);?\s*\};?/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\s*\{\s*id,\s*title,\s*date,\s*description\s*\}\s*\)\s*=>\s*{\s*\(\s*tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\s*\)\s*}\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
index cc180d828b0..f0a441f3119 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
@@ -14,13 +14,13 @@ Inside the `addOrUpdateTask` function, call the `updateTaskContainer` and `reset
 You should call the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\)\s*/)
+assert.match(code, /updateTaskContainer\(\s*\)\s*/)
 ```
 
 You should call the `reset` function after calling the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\);?\s*reset\(\);?\s*/)
+assert.match(code, /updateTaskContainer\(\s*\);?\s*reset\(\s*\);?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
index 8e4c7d94ab6..75750779098 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
@@ -14,7 +14,7 @@ Now remove the `reset()` call inside the `taskForm` submit event listener and ca
 You should remove `reset()` and call `addOrUpdateTask()`.
 
 ```js
-assert.match(code, /addOrUpdateTask\(\)/)
+assert.match(code, /addOrUpdateTask\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
index 0926f6fad63..eb999e40302 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
@@ -13,16 +13,16 @@ To enable editing and deleting for each task, add an `onclick` attribute to both
 
 # --hints--
 
-You should add `onclick="editTask(this)"` as the first attribute of the edit button.
+You should add `onclick="editTask(this)"` to your edit button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")editTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3\s*>Edit<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')editTask\(\s*this\s*\)\1)[^>]*>Edit<\/button>/);
 ```
 
-You should add `onclick="deleteTask(this)"` as the first attribute of the delete button.
+You should add `onclick="deleteTask(this)"` to your delete button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")deleteTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3>Delete<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')deleteTask\(\s*this\s*\)\1)[^>]*>Delete<\/button>/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
index e1f1e3f9767..0cc69d330fa 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable and set its value using the `findIndex()` metho
 You should not alter the `deleteTask` function.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
index 74a197a4d0c..3be21f38c7e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
@@ -30,7 +30,7 @@ Use the `remove()` method to remove the `parentElement` of the `buttonEl` from t
 You should use the `remove()` method to remove the parent element of `buttonEl`.
 
 ```js
-assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\);?/)
+assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\s*\);?/)
 ```
 
 You should use `splice()` on the `taskData` array.
@@ -42,13 +42,13 @@ assert.match(deleteTask.toString(), /taskData\.splice\(/)
 The first argument of your `splice()` method should be `dataArrIndex`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex/)
 ```
 
 The second argument of your `splice()` method should be `1`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex,\s*1\);?/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex,\s*1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
index 00b0e32de99..2234d461a02 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable. For its value, utilize the `findIndex()` metho
 You should not alter the `editTask` function.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
index a28ce51996b..e2f80c50d65 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
@@ -14,7 +14,7 @@ Use square bracket notation to retrieve the task to be edited from the `taskData
 You should assign `taskData[dataArrIndex]` to `currentTask`.
 
 ```js
-assert.match(code, /currentTask\s*=\s*taskData\[dataArrIndex\];?/)
+assert.match(code, /currentTask\s*=\s*taskData\s*\[\s*dataArrIndex\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
index 8aa3a8111c1..16a3a05456a 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
@@ -14,13 +14,13 @@ At this point, editing a task won't reflect when you submit the task. To make th
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 Your `else` block should have the code `taskData[dataArrIndex] = taskObj`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*taskData\[dataArrIndex\]\s*=\s*taskObj;?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*taskData\s*\[\s*dataArrIndex\s*\]\s*=\s*taskObj;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
index a445e6dbe28..8a46bde2971 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
@@ -26,13 +26,13 @@ After that, open your browser console and go to the `Applications` tab, select `
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 Your `localStorage.setItem()` should have a value of `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*myTaskArr\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*myTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
index 59ed16f664d..868c27bd092 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
@@ -16,13 +16,13 @@ To resolve the issue, wrap the data you're saving in the `JSON.stringify()` meth
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 You should wrap `JSON.stringify()` around `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*JSON\.stringify\(myTaskArr\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*JSON\.stringify\(\s*myTaskArr\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
index ef7b7841d98..2dfecc328f0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
@@ -16,13 +16,13 @@ Use the `getItem()` method to retrieve the `myTaskArr` array and assign it to th
 You should use `const` to create a `getTaskArr` variable and assign `localStorage.getItem("data")` to it.
 
 ```js
-assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(('|")data\1\);?/)
+assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\1\s*\);?/)
 ```
 
 You should log the `getTaskArr` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArr\);?/)
+assert.match(code, /console\.log\(\s*getTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
index 78bdd9701bf..a3341ff495e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
@@ -18,13 +18,13 @@ Check the console to see the difference between `getTaskArr` and `getTaskObj`.
 You should use `const` to create a `getTaskArrObj` variable and assign it to `JSON.parse(localStorage.getItem('data'));`.
 
 ```js
-assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\);?/)
+assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\);?/)
 ```
 
 You should log the `getTaskArrObj` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArrObj\);?/)
+assert.match(code, /console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
index 105492be6c8..4e490645262 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
@@ -16,7 +16,7 @@ Remove the `data` item from local storage and open the console to observe the re
 You should use `localStorage.removeItem()` to remove the `data` item from the browser's local storage.
 
 ```js
-assert.match(code, /localStorage\.removeItem\(('|")data\1\);?/)
+assert.match(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
index a8d9660ed7c..5501bbb9ba9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
@@ -16,13 +16,13 @@ Remove `localStorage.removeItem()` and use `localStorage.clear()` instead. You d
 You should remove `localStorage.removeItem("data")`.
 
 ```js
-assert.notMatch(code, /localStorage\.removeItem\(('|")data\1\);/)
+assert.notMatch(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);/)
 ```
 
 You should remove everything from the browser `local storage` with `localStorage.clear()`.
 
 ```js
-assert.match(code, /localStorage\.clear\(\);?/)
+assert.match(code, /localStorage\.clear\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
index 1624cbecb22..2dd71473cd5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
@@ -14,7 +14,7 @@ Remove the `myTaskArr` array and all of the code for `localStorage` because you
 You should remove `myTaskArr` and all the code related to `localStorage` that you've just learned.
 
 ```js
-assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s"Walk\s*the\s*Dog",\s*date:\s*"22-04-2022"\s*\},\s*\{\s*task:\s"Read\s*some\s*books",\s*date:\s*"02-11-2023"\s*\},\s*\{\s*task:\s"Watch\s*football",\s*date:\s*"10-08-2021"\s*\},\s*\];?\s*localStorage\.setItem\("data", JSON\.stringify\(myTaskArr\)\);\s*localStorage\.clear\(\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\("data"\)\s*console\.log\(getTaskArr\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\("data"\)\);?\s*console\.log\(getTaskArrObj\);?/)
+assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s('|")Walk\s*the\s*Dog\1,\s*date:\s*('|")22-04-2022\2\s*\},\s*\{\s*task:\s('|")Read\s*some\s*books\3,\s*date:\s*('|")02-11-2023\4\s*\},\s*\{\s*task:\s('|")Watch\s*football\5,\s*date:\s*('|")10-08-2021\6\s*\},\s*\]\s*;?\s*localStorage\.setItem\(('|")data\7, JSON\.stringify\(\s*myTaskArr\s*\)\s*\);\s*localStorage\.clear\(\s*\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\8\s*\)\s*console\.log\(\s*getTaskArr\s*\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\9\s*\)\s*\);?\s*console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
@@ -316,7 +316,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -346,7 +346,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
index 108db1d12f8..5fa37432892 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
@@ -24,13 +24,13 @@ assert.match(code, /localStorage\.setItem\(/)
 You should pass in `"data"` as the first argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
index 4eb66845c89..d7da8d8c983 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
@@ -24,14 +24,14 @@ You should pass in `"data"` as the first argument of your `localStorage.setItem(
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
index 3411d833295..922c64eda5c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
@@ -16,7 +16,7 @@ Set `taskData` to the retrieval of `data` from local storage **or** an empty arr
 You should set the `taskData` variable to `JSON.parse(localStorage.getItem("data")) || [];`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\)\s*\|\|\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\)\s*\|\|\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -321,7 +321,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -352,7 +352,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
index e82e2d1f40a..deed518030d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
@@ -20,13 +20,13 @@ With that, you've completed this project.
 You should create an `if` statement with `(taskData.length)` as the condition. As a reminder, `0` is a falsy value.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*/)
 ```
 
 You should call the `updateTaskContainer` function in your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*updateTaskContainer\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*updateTaskContainer\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
index 11116545213..4a0d2a438f4 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
@@ -20,7 +20,7 @@ console.log(Date.now()); // 1628586800000
 You should attach `-${Date.now()}` to the existing value of the `id` key. Don't forget it needs to be inside the template string.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
index cbf9c79a638..f21fcdc5ab2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
@@ -1,32 +1,18 @@
 ---
 id: 63e02a333354343b595d64ca
-title: Paso 16
+title: Step 15
 challengeType: 0
-dashedName: step-16
+dashedName: step-15
 ---
 
 # --description--
 
-Now that you have tested the `Object.freeze()` method, you can delete those two lines of code from the last lesson.
-
 The next step is to access the key called `sport` from the `myFavoriteFootballTeam` object and assign it to a new `const` variable called `sport`.
 
 Remember you can use dot notation for this.
 
 # --hints--
 
-You should remove your assignment of the `USA` string to `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /myFavoriteFootballTeam\.team\s*=\s*('|"|`)USA\1\s*/);
-```
-
-You should remove your `console.log` for `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /console\.log\(\s*myFavoriteFootballTeam\.team\s*\)/);
-```
-
 You should use `const` to declare a `sport` variable.
 
 ```js
@@ -462,8 +448,6 @@ Object.freeze(myFavoriteFootballTeam);
 
 --fcc-editable-region--
 
-myFavoriteFootballTeam.team = "USA";
-console.log(myFavoriteFootballTeam.team);
 
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
index bc9df10cc8f..d9520c64e56 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
@@ -1,8 +1,8 @@
 ---
 id: 63e0334b7a24bd3c96aca4de
-title: Paso 17
+title: Step 16
 challengeType: 0
-dashedName: step-17
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
index 113bba79702..e556c5c05e3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e036373fc9173d284e165a
-title: Paso 18
+title: Step 17
 challengeType: 0
-dashedName: step-18
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
index e3b0e1b9ae4..2a8ea3b0d0b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
@@ -1,8 +1,8 @@
 ---
 id: 63e03b86008bbb3e1c3de846
-title: Paso 19
+title: Step 18
 challengeType: 0
-dashedName: step-19
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
index 5fb895b60d0..32ae955337d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
@@ -1,8 +1,8 @@
 ---
 id: 63e042661ad2663f0d468740
-title: Paso 20
+title: Step 19
 challengeType: 0
-dashedName: step-20
+dashedName: step-19
 ---
 
 # --description--
@@ -15,7 +15,7 @@ Use object destructuring to access the `coachName` value.
 
 ```js
 
-assert.match(code, /const\s*{\s*coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach\s*/)
+assert.match(code, /const\s*{\s*(coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach|headCoach\s*:\s*{\s*coachName\s*}\s*}\s*=\s*myFavoriteFootballTeam)\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
index 8f8606a1695..ed536a4b70e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
@@ -1,8 +1,8 @@
 ---
 id: 63e050bf935ac341b88326d6
-title: Paso 21
+title: Step 20
 challengeType: 0
-dashedName: step-21
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
index 919f1dc2e19..3562608e3f9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05557016dfd45ea49152c
-title: Paso 22
+title: Step 21
 challengeType: 0
-dashedName: step-22
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
index 5c97f665688..70772e4cba9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05c00b615bb46ac87273a
-title: Paso 23
+title: Step 22
 challengeType: 0
-dashedName: step-23
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
index d5451691a0c..862d6c0fd77 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
@@ -1,8 +1,8 @@
 ---
 id: 63e060df21bca347b2d2b374
-title: Paso 24
+title: Step 23
 challengeType: 0
-dashedName: step-24
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
index 9b0327e1f66..5ea194d88aa 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e062d6090ebb486a4eda3a
-title: Paso 25
+title: Step 24
 challengeType: 0
-dashedName: step-25
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
index 04207e69d29..5cd7ea1d6e4 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
@@ -1,8 +1,8 @@
 ---
 id: 63e949b8327aa2aca2ca8eac
-title: Paso 26
+title: Step 25
 challengeType: 0
-dashedName: step-26
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
index f77b39c873a..b13000896fc 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
@@ -1,8 +1,8 @@
 ---
 id: 63e94dae6dcedbad73f2f6ee
-title: Paso 27
+title: Step 26
 challengeType: 0
-dashedName: step-27
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
index e85dfddb909..dbeb80c7a4c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
@@ -1,8 +1,8 @@
 ---
 id: 63e954321b0a77ae4f6d9650
-title: Paso 28
+title: Step 27
 challengeType: 0
-dashedName: step-28
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
index d8db4d374f1..3912e0e6228 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95a45dce95baf41dd4f78
-title: Paso 29
+title: Step 28
 challengeType: 0
-dashedName: step-29
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
index 2e87da76e92..9a21ae45f28 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95e39860dc5b01ebe9be0
-title: Paso 30
+title: Step 29
 challengeType: 0
-dashedName: step-30
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
index 96b1f44e4d1..e037852b3bc 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9667c881b61b1e338d276
-title: Paso 31
+title: Step 30
 challengeType: 0
-dashedName: step-31
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
index fad7179970d..20e68b6415e 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96938d2a347b2734a1587
-title: Paso 32
+title: Step 31
 challengeType: 0
-dashedName: step-32
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
index c121aa26464..eb225b3116c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96eb94c97b6b31ee50f63
-title: Paso 33
+title: Step 32
 challengeType: 0
-dashedName: step-33
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
index bb80ca32fef..401f8fcb289 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9718d7d490bb3940d5a0a
-title: Paso 34
+title: Step 33
 challengeType: 0
-dashedName: step-34
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
index 09da5aa44cc..e2cf0d8bbea 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9737f686c76b4078a60f4
-title: Paso 35
+title: Step 34
 challengeType: 0
-dashedName: step-35
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
index 3c163c26a74..0544b4bdd11 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28972973504e7bb58b0b3
-title: Paso 36
+title: Step 35
 challengeType: 0
-dashedName: step-36
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
index ae2527141cb..91426574c6f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28ef082d771e8bf71f94a
-title: Paso 37
+title: Step 36
 challengeType: 0
-dashedName: step-37
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
index 5190301a7f5..9ad6aab3caa 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
@@ -1,8 +1,8 @@
 ---
 id: 63f293c804d6f9e9a83ca4c5
-title: Paso 38
+title: Step 37
 challengeType: 0
-dashedName: step-38
+dashedName: step-37
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Open the console, and make a selection from the teammates dropdown menu. You sho
 You should add a `console.log` with the value of `e.target.value`.
 
 ```js
-assert.match(code, /console\.log\s*\(e\.target\.value\)\s*/)
+assert.match(code, /console\.log\s*\(\s*e\.target\.value\s*\)\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
index 837b7168b3a..f95cf6e5d4b 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29804e3ec00ea6fab1ec4
-title: Paso 39
+title: Step 38
 challengeType: 0
-dashedName: step-39
+dashedName: step-38
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Inside the callback function, access the `innerHTML` property of the `playerCard
 You should not have the `console.log` statement in your code.
 
 ```js
-assert.notMatch(code, /\s*console\.log\(e\.target\.value\)/);
+assert.notMatch(code, /\s*console\.log\(\s*e\.target\.value\s*\)/);
 ```
 
 You should access the `innerHTML` property of the `playerCards` element.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
index 688b0cb8e0a..134d1331364 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29ce62aea65eb041758c8
-title: Paso 40
+title: Step 39
 challengeType: 0
-dashedName: step-40
+dashedName: step-39
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /switch\s*\(\s*e\.target\.value\s*\)/);
 Your `switch` statement should be empty.
 
 ```js
-assert.match(code, /\s*switch\s*\(e\.target\.value\)\s*{\s*}/);
+assert.match(code, /\s*switch\s*\(\s*e\.target\.value\s*\)\s*{\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
index 92c82a78bee..a3caf074b5c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a0a860790eebe61bf908
-title: Paso 41
+title: Step 40
 challengeType: 0
-dashedName: step-41
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
index a5a44ef4d0f..303dace84dc 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a4a8087e6dec8ec47f16
-title: Paso 44
+title: Step 43
 challengeType: 0
-dashedName: step-44
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
index b902a5c1ffb..b66de0298ec 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a5f09a785aed155c0a56
-title: Paso 45
+title: Step 44
 challengeType: 0
-dashedName: step-45
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
index 9aa07f71b2e..f6cb13c7bc5 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a8e14fb388edd3242527
-title: Paso 46
+title: Step 45
 challengeType: 0
-dashedName: step-46
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
index 52c115d22b9..3ff1f2396c8 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2aa36fcdc63ee4e18fc37
-title: Paso 47
+title: Step 46
 challengeType: 0
-dashedName: step-47
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
index 1f6d870b2a1..0543e8d3b98 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2ab4f6c52c5eec6d68de4
-title: Paso 48
+title: Step 47
 challengeType: 0
-dashedName: step-48
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
index 0af4984ac45..6cd48c0e9a8 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
@@ -1,8 +1,8 @@
 ---
 id: 641fc88d8fa7127f76e0324f
-title: Paso 42
+title: Step 41
 challengeType: 0
-dashedName: step-42
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
index d6aab4866d2..11c8298ac82 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
@@ -1,8 +1,8 @@
 ---
 id: 641fcfd468185384ac218b7d
-title: Paso 43
+title: Step 42
 challengeType: 0
-dashedName: step-43
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
index 6fc874b754e..74b535128cd 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-After alerting the user if the number input is empty of the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
+After alerting the user if the number input is empty or the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
 
 Add the `return` keyword after `alert()`.
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
index 92e7af49c6f..1bcdf11b4cc 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
@@ -24,7 +24,6 @@ Use the `.reverse()` method to reverse the order of the `remainders` array, and
 You should use the `.reverse()` method on the `remainders` array.
 
 ```js
-console.log(String(decimalToBinary))
 assert.match(String(decimalToBinary), /remainders\.reverse\(\s*\)/);
 ```
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
index 35a5af9d3c6..9e18e6502fa 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
@@ -31,7 +31,7 @@ assert.notMatch(String(decimalToBinary), /else\s+if\s*\([\s\S]+\)/);
 Your `decimalToBinary()` function should have an `if` statement that checks if `input` is equal to `0` or `1`.
 
 ```js
-assert.match(String(decimalToBinary), /if\s*\(input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
+assert.match(String(decimalToBinary), /if\s*\(\s*input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(\s*input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
 ```
 
 If input is equal to `0` or `1`, your `decimalToBinary()` function should return `String(input)`.
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
index 78ee8c4dba4..74cfe39c0d3 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
@@ -44,7 +44,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1000` as the second argument to the `setTimeout` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
index 78050326edd..983371caed0 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
@@ -48,7 +48,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
index 4bfc73b7e34..88c8bafa631 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
@@ -46,7 +46,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
index 2a0a59f7f37..152308dd0d7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the `id` attribute to the `inputVal`
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
index d49bf842c43..41e77fb84d7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the text of the paragraph element to
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
index 91a8be933e2..5572d63a00c 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `showMsgDelay` property of the c
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)showMsgDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)showMsgDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
index 74ba1622246..658071ed0f2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
@@ -18,7 +18,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
index aceccb382c2..a564b89ff20 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
@@ -27,7 +27,7 @@ You should set the `textContent` property of the targeted element equal to the `
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\[\s*('|"|`)\s*msg\s*\1\s*\]/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\s*\[\s*('|"|`)\s*msg\s*\1\s*\]/
 );
 ```
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
index 26481263675..68fe5508412 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `removeElDelay` property of the
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)removeElDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)removeElDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
index afe536b6d77..74670390655 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
@@ -16,7 +16,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.lengthOf(
   String(showAnimation).match(
-    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
+    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
   ),
   2
 );
@@ -27,7 +27,7 @@ You should chain the `.remove()` method to the `.getElementById()` method.
 ```js
 assert.match(
   String(showAnimation),
-  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
+  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
 );
 ```
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
index 0510eb46e69..c92698c68f7 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
@@ -18,7 +18,7 @@ You should set the `textContent` property of `result` equal to calling `decimalT
 ```js
 assert.match(
   String(showAnimation),
-  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\[('|"|`)textContent\1\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
+  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\s*\[\s*('|"|`)textContent\1\s*\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
 );
 ```
 
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
index bb165bd7989..3380060ba90 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
@@ -9,9 +9,9 @@ dashedName: step-5
 
 Back in your event listener, you need to update the text of the `result` element.
 
-Use a ternary operator to update the text of the `result` element after the `if` statement. Check the truthiness of calling `isSpam()` on the value of the `messageInput` element. If true, set the text to `Oh no! This looks like a spam message.`. Otherwise, set the text to `This message does not seem to contain any spam.`
+After the `if` statement, use a ternary operator to check the truthiness of calling `isSpam()` with `messageInput.value` as the argument. If true, set the `textContent` property on the `result` element to `Oh no! This looks like a spam message.`. Otherwise, set it to `This message does not seem to contain any spam.`
 
-Then set the `messageInput` element's value to an empty string.
+Then set the `messageInput` element's `value` property to an empty string.
 
 # --hints--
 
@@ -21,10 +21,10 @@ You should use the assignment operator to set the `textContent` property of the
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*/)
 ```
 
-You should assign the `isSpam()` function call to `result.textContent`.
+You should call the `isSpam()` function after the assignment operator `=` and before the `?` ternary operator.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(.*\)\s*\?/)
 ```
 
 You should use ternary syntax to check the truthiness of `isSpam(messageInput.value)`.
@@ -45,10 +45,10 @@ The falsy expression of your ternary should set the `textContent` property of th
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*/);
 ```
 
-After your ternary, set the `value` of `messageInput` to an empty string.
+After your ternary, set the `value` property on the `messageInput` element to an empty string.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5\s*;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
index aa9ba2a683f..0b84d8633a2 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
@@ -24,13 +24,13 @@ assert.match(code, /const\s+currentDateParagraph\s+=/);
 You should use `document.getElementById()` to get the `#current-date` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)current-date\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)current-date\1\s*\)/);
 ```
 
 You should assign the `#current-date` element to your `currentDateParagraph` variable.
 
 ```js
-assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(('|"|`)current-date\1\)/g));
+assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(\s*('|"|`)current-date\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
index dbe503752eb..c8434f59e02 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+dateOptionsSelectElement\s+=/);
 You should use `document.getElementById()` to get the `#date-options` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)date-options\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)date-options\1\s*\)/);
 ```
 
 You should assign the `#date-options` element to your `dateOptionsSelectElement` variable.
 
 ```js
-assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(('|"|`)date-options\1\)/g));
+assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(\s*('|"|`)date-options\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
index e1a8ae6390d..c7f19668d3d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
@@ -32,7 +32,7 @@ assert.match(code, /const\s+date\s+=/);
 You should assign a `Date` object to your `date` variable with `new Date()`.
 
 ```js
-assert(code.match(/const\s+date\s+=\s+new\s+Date\(\)/g));
+assert(code.match(/const\s+date\s+=\s+new\s+Date\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
index 6f7d33af89c..b83e0d06b5f 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
@@ -30,7 +30,7 @@ assert.match(code, /const\s+day\s+=/);
 You should assign the `date.getDate()` to your `day` variable.
 
 ```js
-assert(code.match(/const\s+day\s+=\s+date\.getDate\(\)/g));
+assert(code.match(/const\s+day\s+=\s+date\.getDate\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
index 9d110058e39..2891c6d2bbf 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+month\s+=/);
 You should assign the `date.getMonth() + 1` to your `month` variable.
 
 ```js
-assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\)\s*\+\s*1/g));
+assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\s*\)\s*\+\s*1/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
index 13a9064c83c..18c568d01cc 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+year\s+=/);
 You should assign the `date.getFullYear()` to your `year` variable.
 
 ```js
-assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\)/g));
+assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
index 4b1a64ea63e..fe7c8e49051 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+hours\s+=/);
 You should assign the `date.getHours()` to your `hours` variable.
 
 ```js
-assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\)/g));
+assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
index 7a92aee662c..c9eb44b67ad 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+minutes\s+=/);
 You should assign the `date.getMinutes()` to your `minutes` variable.
 
 ```js
-assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\)/g));
+assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
index 0235e844625..ce733ba6fe9 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
@@ -16,7 +16,7 @@ Open up the console and you should see the date printed out.
 You should have a `console.log(formattedDate)` line in your code.
 
 ```js
-assert.match(code, /console\.log\(formattedDate\)/);
+assert.match(code, /console\.log\(\s*formattedDate\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
index 23da0b82e28..b3247b00b7d 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
@@ -22,7 +22,7 @@ assert(code.match(/currentDateParagraph\.textContent\s*=\s*formattedDate/g));
 You should not have a `console.log(formattedDate);` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(formattedDate\);/);
+assert.notMatch(code, /console\.log\(\s*formattedDate\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
index 15e4bb7b3f6..2b8b0065232 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
@@ -15,11 +15,17 @@ element.addEventListener("change", () => {
 });
 ```
 
-Chain the `addEventListener` method to `dateOptionsSelectElement` where the first argument is `change` and the second argument is an empty arrow function.
+Attach the `addEventListener` method to the `dateOptionsSelectElement`. The first argument of the event listener should be the string `change` and the second argument should be an empty arrow function.
 
 # --hints--
 
-You should use the `addEventListener` method to add a `change` event listener to `dateOptionsSelectElement`.
+You should attach the `addEventListener` method to the `dateOptionsSelectElement`.
+
+```js
+assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(/g));
+```
+
+Your event listener should listen for a `change` event.
 
 ```js
 assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(\s*('|")change\1/g));
diff --git a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
index 7bdd19177b0..3f1fb239f72 100644
--- a/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
+++ b/curriculum/challenges/espanol/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
@@ -22,7 +22,7 @@ Chain the `.reverse()` method to the end of `.split()` method.
 You should use the `.reverse()` method to reverse the order of the array returned by `.split()`.
 
 ```js
-assert(code.match(/\.reverse\(\)/g));
+assert(code.match(/\.reverse\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/espanol/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md b/curriculum/challenges/espanol/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
index d08225c73d2..1f1a60542e3 100644
--- a/curriculum/challenges/espanol/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
+++ b/curriculum/challenges/espanol/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
@@ -109,9 +109,7 @@ assert(getCorrectStyle()?.textAlign === 'center');
 # --seed--
 
 ## --seed-contents--
-
 ```css
-
 ```
 
 ```html
diff --git a/curriculum/challenges/espanol/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md b/curriculum/challenges/espanol/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
index 6480354b9f3..cf7e94d0967 100644
--- a/curriculum/challenges/espanol/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
+++ b/curriculum/challenges/espanol/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
@@ -29,4 +29,4 @@ They are outdated technologies.
 
 ## --video-solution--
 
-1
+2
diff --git a/curriculum/challenges/espanol/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md b/curriculum/challenges/espanol/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
index 0f6ad5eeeee..f4ee0c9f7ce 100644
--- a/curriculum/challenges/espanol/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
+++ b/curriculum/challenges/espanol/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
@@ -1,5 +1,5 @@
 ---
-id: 657e0d0037192f3d9e3d5417 
+id: 657e0d0037192f3d9e3d5417
 title: Task 128
 challengeType: 22
 dashedName: task-128
diff --git a/curriculum/challenges/espanol/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md b/curriculum/challenges/espanol/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
index ed170309c51..df3d1e6ecbe 100644
--- a/curriculum/challenges/espanol/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
+++ b/curriculum/challenges/espanol/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
@@ -13,7 +13,7 @@ Bob: Alright, team. This is Alice's first day with _ , so please let _ introduce
 -->
 # --description--
 
-You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sould more natural. Listen for the object pronouns Bob uses in this audio.
+You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sound more natural. Listen for the object pronouns Bob uses in this audio.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/espanol/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md b/curriculum/challenges/espanol/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
index 392405a1148..4af2bab769c 100644
--- a/curriculum/challenges/espanol/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
+++ b/curriculum/challenges/espanol/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
@@ -26,13 +26,13 @@ A continuación el algoritmo:
   <li>Seed the RNG with the number of the deal.
   </li><li>Crea un arreglo de 52 cartas: As de Tréboles, As de Diamantes, As de Corazones, As de Espadas, 2 de Tréboles, 2 de Diamantes, y así sucesivamente por los rangos: As, 2, 3, 4, 5, 6, 7, 8, 9, 10, Sota, Reina, Rey. Los índices del arreglo son de 0 a 51, con As de Tréboles en 0, y Rey de Espadas al 51.</li>
   <li>Hasta que el arreglo quede vacío:</li>
-  <li>Escoge una carta aleatoria al índice ≡ siguiente número aleatorio (mod array length).</li>
     <ul>
+      <li>Choose a random card at <i>index</i> ≡ <i>next random number</i> (mod <i>array length</i>).</li>
       <li>Swap this random card with the last card of the array.</li>
-      <li>Remueve esta carta aleatoria del arreglo. (Longitud del arreglo bajara en 1)</li>
-      <li>Reparte esta carta aleatoria.</li>
+      <li>Remove this random card from the array. (Array length goes down by 1.)</li>
+      <li>Deal this random card.</li>
     </ul>
-  <li>Reparte todas las 52 cartas, boca arriba, sobre 8 columnas. Las primeras 8 cartas van en 8 columnas, las siguientes 8 van sobre las primeras 8 cartas, y así sucesivamente.</li>
+  <li>Deal all 52 cards, face up, across 8 columns. The first 8 cards go in 8 columns, the next 8 cards go on the first 8 cards, and so on.</li>
 </ol>
 
 **Por ejemplo:**
diff --git a/curriculum/challenges/espanol/22-rosetta-code/rosetta-code-challenges/execute-brain.md b/curriculum/challenges/espanol/22-rosetta-code/rosetta-code-challenges/execute-brain.md
index 4a9c7e648c3..62a7d597284 100644
--- a/curriculum/challenges/espanol/22-rosetta-code/rosetta-code-challenges/execute-brain.md
+++ b/curriculum/challenges/espanol/22-rosetta-code/rosetta-code-challenges/execute-brain.md
@@ -16,16 +16,16 @@ Below are links to each of the versions of RCBF.
 
 An implementation need only properly implement the following instructions:
 
-| Command                   | Descripción                                                                                 |
-| ------------------------- | ------------------------------------------------------------------------------------------- |
-| <code>></code> | Move the pointer to the right                                                               |
-| <code>&lt;</code> | Move the pointer to the left                                                                |
-| <code>+</code> | Increment the memory cell under the pointer                                                 |
-| <code>-</code> | Decrement the memory cell under the pointer                                                 |
-| <code>.</code> | Output the character signified by the cell at the pointer                                   |
-| <code>,</code> | Input a character and store it in the cell at the pointer                                   |
-| <code>\[</code> | Jump past the matching <code>]</code> if the cell under the pointer is 0           |
-| <code>]</code> | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
+| Command           | Description                                                                        |
+| ----------------- | ---------------------------------------------------------------------------------- |
+| <code>></code>    | Move the pointer to the right                                                      |
+| <code>&lt;</code> | Move the pointer to the left                                                       |
+| <code>+</code>    | Increment the memory cell under the pointer                                        |
+| <code>-</code>    | Decrement the memory cell under the pointer                                        |
+| <code>.</code>    | Output the character signified by the cell at the pointer                          |
+| <code>,</code>    | Input a character and store it in the cell at the pointer                          |
+| <code>\[</code>   | Jump past the matching <code>]</code> if the cell under the pointer is 0           |
+| <code>]</code>    | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
 
 Any cell size is allowed, EOF (*E*nd-*O*-*F*ile) support is optional, as is whether you have bounded or unbounded memory.
 
diff --git a/curriculum/challenges/german/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md b/curriculum/challenges/german/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
index ea8ba592988..99f09486aa7 100644
--- a/curriculum/challenges/german/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
+++ b/curriculum/challenges/german/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
@@ -22,7 +22,8 @@ Vervollständige die Funktion mit Hilfe der folgenden Regeln, um das an die Funk
 -   Deine Funktion muss immer das gesamte `records`-Objekt zurückgeben.
 -   Falls `value` einen leeren String darstellt, lösche die angegebene `prop`-Eigenschaft aus dem Album.
 -   Falls `prop` nicht `tracks` darstellt und `value` kein leerer String ist, dann weise `value` dem `prop` des jeweiligen Albums zu.
--   Wenn `prop` `tracks` ist und `value` keinen leeren String darstellt, dann musst du das `tracks`-Array des Albums aktualisieren. Wenn das Album keine `tracks`-Eigenschaft hat, dann weise ihm ein leeres Array zu. Füge dann den `value` als letzten Eintrag im `tracks`-Array des Albums hinzu.
+-   If `prop` is `tracks` and `value` isn't an empty string, but the album doesn't have a `tracks` property, create an empty array and add `value` to it.
+-   If prop is `tracks` and `value` isn't an empty string, add `value` to the end of the album's existing `tracks` array.
 
 **Hinweis:** Für die Tests wird eine Kopie des Objekts `recordCollection` verwendet. Du solltest das Objekt `recordCollection` nicht direkt anpassen.
 
diff --git a/curriculum/challenges/german/03-front-end-development-libraries/sass/use-for-to-create-a-sass-loop.md b/curriculum/challenges/german/03-front-end-development-libraries/sass/use-for-to-create-a-sass-loop.md
index 7e96c50994c..1d1fa437262 100644
--- a/curriculum/challenges/german/03-front-end-development-libraries/sass/use-for-to-create-a-sass-loop.md
+++ b/curriculum/challenges/german/03-front-end-development-libraries/sass/use-for-to-create-a-sass-loop.md
@@ -54,7 +54,7 @@ Dein Code sollte die `@for`-Direktive verwenden.
 assert(code.match(/@for /g));
 ```
 
-Deine Klasse `.text-1` sollte eine `font-size` von 15px haben.
+Deine Klasse `.text-1` sollte eine`font-size` von 15px haben.
 
 ```js
 assert($('.text-1').css('font-size') == '15px');
diff --git a/curriculum/challenges/german/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md b/curriculum/challenges/german/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
index f902c1e028c..8ca0ee7f682 100644
--- a/curriculum/challenges/german/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
+++ b/curriculum/challenges/german/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
@@ -8,7 +8,7 @@ dashedName: serialization-of-a-user-object
 
 # --description--
 
-Serialisierung und Deserialisierung sind wichtige Konzepte der Authentifizierung. Ein Objekt zu serialisieren bedeutet, dessen Inhalt in einen kleinen *key* zu konvertieren, welcher dann in das Originalobjekt deserialisiert werden kann. Auf diese Weise können wir wissen, wer mit dem Server kommuniziert hat, ohne dabei Authentifizierungsdaten wie Nutzernamen und Passwort für jeden Seitenaufruf übertragen zu müssen.
+Serialization and deserialization are important concepts in regard to authentication. Ein Objekt zu serialisieren bedeutet, dessen Inhalt in einen kleinen *key* zu konvertieren, welcher dann in das Originalobjekt deserialisiert werden kann. Auf diese Weise können wir wissen, wer mit dem Server kommuniziert hat, ohne dabei Authentifizierungsdaten wie Nutzernamen und Passwort für jeden Seitenaufruf übertragen zu müssen.
 
 Um dies richtig einzurichten, musst du eine Serialisierungsfunktion und eine Deserialisierungsfunktion haben. In Passport können diese mit erstellt werden:
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
index a1da5d8ea25..1baa719d923 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
@@ -19,8 +19,8 @@ You should use the `append()` method to append `start` to `paths[start]`.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\.append\s*\(\s*start\s*\)/m));
+    const {function_body} = shortest;
+    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\s*\.append\s*\(\s*start\s*\)/m));
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
index 27645dd66b4..8b3775650ca 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
@@ -27,8 +27,8 @@ You should call `extend()` on the neighbour node path passing the current node p
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
index 2345add99b5..cfe7a59d060 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
@@ -16,8 +16,8 @@ You should append `node` to `paths[node]` just after your `else` statement.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\.append\s*\(\s*node\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\s*\.append\s*\(\s*node\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
index 4da959c58b4..6d7f54daf6e 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
@@ -28,7 +28,7 @@ You should print the provided string inside your new `for` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
+    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(\s*f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
index 4eb36147676..e1c6b2520e6 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
@@ -32,7 +32,7 @@ You should create a variable called `targets_to_print` after your `while` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=/ms));
   }
 })
 ```
@@ -43,7 +43,7 @@ You should the ternary syntax to assign `[target]` when `target` is truthy, and
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
index 76db1a5fcf0..47aa01f80a4 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
@@ -25,7 +25,7 @@ Just before your `print()` call, use the `del` keyword to delete the `age` key a
 You should use the `del` keyword to delete `copper['age']` before the `print()` call.
 
 ```js
-({ test: () => assert.match(code, /^del\s+copper\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
+({ test: () => assert.match(code, /^del\s+copper\s*\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
index ef9de125224..148db1ae4de 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
@@ -24,7 +24,7 @@ Create an `__init__` method inside your `Board` class.
 Your method should be named `__init__`. Don't add any parameters.
 
 ```js
-assert.match(code, / +def\s+__init__\s*\(\)\:/);
+assert.match(code, / +def\s+__init__\s*\(\s*\)\:/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
index 62d787d3061..137a7408cb4 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
@@ -43,6 +43,6 @@ class Board:
 --fcc-editable-region--
         for index, line in enumerate(self.board):
           row_list = []
-          
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
index 4a6b2a2f3d5..faa5b8003cb 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
@@ -16,7 +16,7 @@ Use list slicing to create the three lists of equal length representing the `lin
 You should have `enumerate([line[:3], line[3:6], line[6:]], start=1)` within the inner `for` loop.
 
 ```js
-assert.match(code, /\[line\[:3\],\s*line\[3:6\],\s*line\[6:\]\]\s*,\s*start\s*=\s*1/);
+assert.match(code, /\[\s*line\s*\[\s*:3\s*\]\s*,\s*line\s*\[\s*3\s*:\s*6\s*\]\s*,\s*line\s*\[\s*6\s*:\s*\]\s*\]\s*,\s*start\s*=\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
index 7af9a0064ff..5ff87ba5094 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
@@ -14,13 +14,13 @@ In the `try` block, attempt to find the index of the first occurrence of `0` in
 Use the index of the first occurrence of `0` in the current row using `contents.index(0)`.
 
 ```js
-assert.match(code, /contents\.index\(0\)/)
+assert.match(code, /contents\.index\(\s*0\s*\)/)
 ```
 
 You should have `col = contents.index(0)` within the `try` block.
 
 ```js
-assert.match(code, /col\s*=\s*contents\.index\(0\)/)
+assert.match(code, /col\s*=\s*contents\.index\(\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
index 62528200a3a..8e646bb31ad 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
@@ -16,7 +16,7 @@ You should check if the number(`num`) is not present in `self.board[row]`.
 You should have `num not in self.board[row]` within `valid_in_row`.
 
 ```js
-assert.match(code, /num\s+not\s+in\s+self\.board\[row\]/)
+assert.match(code, /num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
index 8f2fa5fe4d8..a9385e6abf2 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
@@ -21,7 +21,7 @@ You should have `return num not in self.board[row]` within `valid_in_row`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_row");
 const {function_body} = valid;
-assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\[row\]/);
+assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
index f86ff49b441..b0bc9ce84b0 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] != num` within `valid_in_col`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /self\.board\[row\]\[col\]\s*!=\s*num/);
+assert.match(function_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
index 75c1d223416..d64d3ec80ed 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
@@ -28,7 +28,7 @@ You should have `all(self.board[row][col] != num for row in range(9))` within `v
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /all\s*\(\s*self\.board\[row\]\[col\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
+assert.match(function_body, /all\s*\(\s*self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
index 7c5d0e2be3d..e30ace5f3c3 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
@@ -21,7 +21,7 @@ You should assign the result of `(row // 3) * 3` to `row_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /row_start\s*=\s*\(row\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /row_start\s*=\s*\(\s*row\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
index 4d75ccc5193..00049f540f5 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
@@ -21,7 +21,7 @@ You should assign the result of `(col // 3) * 3` to `col_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /col_start\s*=\s*\(col\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /col_start\s*=\s*\(\s*col\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
index 159153ce9dd..622c5b904f8 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
@@ -22,7 +22,7 @@ You should have `next_empty := self.find_empty_cell()` within the `solver` metho
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\)/);
+assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
index e623596609a..a840f119023 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
@@ -16,7 +16,7 @@ You should have `if (next_empty := self.find_empty_cell()) is None:` withing `so
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /if\s*\(next_empty\s*:=\s*self\.find_empty_cell\(\)\)\s*is\s*None:/)
+assert.match(function_body, /if\s*\(\s*next_empty\s*:=\s*self\.find_empty_cell\(\s*\)\s*\)\s*is\s*None:/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
index ae943fbeee0..895642fce85 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
@@ -7,7 +7,7 @@ dashedName: step-64
 
 # --description--
 
-If still there are empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive).
+If there are still empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive). Your loop should use the variable named `guess`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have `for guess in range(1,10):` within the `else` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "else");
-assert.match(block_body, /for\s+\w+\s+in\s+range\(1,\s*10\)/);
+assert.match(block_body, /for\s+\w+\s+in\s+range\(\s*1,\s*10\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
index aa45a65f7aa..902da90ba60 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] = guess` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*guess/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*guess/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
index dc599f09a36..b0c4d182b81 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
@@ -17,7 +17,7 @@ You should have `self.solver()` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.solver\(\)/);
+assert.match(block_body, /self\.solver\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
index 68069467807..5a753c45139 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
@@ -19,7 +19,7 @@ You should have `if self.solver():` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /if\s+self\.solver\(\):/);
+assert.match(block_body, /if\s+self\.solver\(\s*\):/);
 ```
 
 You should have `return True` within `if self.solver():`.
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
index 9eba5511e13..39714a69a5f 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
@@ -19,7 +19,7 @@ You should have `self.board[row][col] = 0` outside the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*0/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*0/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
index d46461336b1..12ec58c9b1d 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
@@ -18,7 +18,7 @@ You should have `gameboard = Board(board)` within the `solve_sudoku` function.
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solve_sudoku");
-assert.match(function_body, /gameboard\s*=\s*Board\(board\)/);
+assert.match(function_body, /gameboard\s*=\s*Board\(\s*board\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
index 83fbc5be123..83c97c32004 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
@@ -22,7 +22,7 @@ With this, you are finished with building the sudoku solver!
 Call the `solve_sudoku` method with `puzzle` as input.
 
 ```js
-assert.match(code, /solve_sudoku\(puzzle\)/);
+assert.match(code, /solve_sudoku\(\s*puzzle\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
index f0a47aed681..60c6af9b304 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
@@ -37,7 +37,7 @@ You should assign `array[:middle_point]` to the `left_part` variable.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /left_part\s*=\s*array\[:middle_point\]/);
+    assert.match(function_body, /left_part\s*=\s*array\s*\[\s*:\s*middle_point\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
index 68bdab56556..081e73a5b96 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
@@ -22,7 +22,7 @@ You should replace `pass` keyword with an `if` statement with this condition: `l
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*pass/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
index 147e1743d5a..77319a83d23 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
@@ -24,7 +24,7 @@ You should replace `pass` with `array[sorted_index] = left_part[left_array_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*array\[sorted_index\]\s*=\s*left_part\[left_array_index\]\s*(?!.*\bpass\b)/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]\s*(?!.*\bpass\b)/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
index b239850b29a..3850401e4fb 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
@@ -24,7 +24,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /else:\s*[^}]*array\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /else:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
index a0966273964..160e7c4aa03 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
@@ -24,7 +24,7 @@ Your `while` loop should have this condition: `left_array_index < len(left_part)
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(left_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):/m);
   }
 })
 ```
@@ -38,7 +38,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
index 61782a0c045..3fb27b526c5 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = left_part[left_array_index]` in the body
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ You should not have `pass` in the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
index 382f2878732..0518649316a 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `left_array_i
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
index 2c61e890d6d..5b84b4ff9a5 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
@@ -22,7 +22,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
index 3bc77c3bd17..216768ac287 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
@@ -22,7 +22,7 @@ Your `while` loop should have this condition: `right_array_index < len(right_par
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(right_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):/m);
   }
 })
 ```
@@ -36,7 +36,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
index bb0fbc98575..80748301996 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
index 3f9d6743461..a806625a959 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
@@ -20,7 +20,7 @@ You should have `right_array_index += 1` within the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bright_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bright_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
index 0eaed370ebb..94360d6057d 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
index fdfa315fad5..8bb4030b3db 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
@@ -24,7 +24,7 @@ You should create an `if` statement to check if `len(array) <= 1`. Don't forget
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*pass/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
index ac10e3fb7af..a0692b2b0a2 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
@@ -20,7 +20,7 @@ You should replace `pass` with a `return` statement in the body of the `if` stat
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*return/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the body of the `if` statement
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
index b317c14010a..0c25dbb5735 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
@@ -21,8 +21,8 @@ You should add `1` to the current value of `left_array_index`.
     const { function_body } = merge_sort;
 
     const allowedMatches = [
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
     ]
 
     const anyMatch = allowedMatches.some((match) => match.test(function_body));
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
index 1e72e623437..0fb853bf185 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
@@ -34,7 +34,7 @@ You should assign `array[middle_point:]` to the `right_part` variable
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /right_part\s*=\s*array\[middle_point:\]/);
+    assert.match(function_body, /right_part\s*=\s*array\s*\[\s*middle_point\s*:\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
index 3d4ed9dd7ea..7cdba614030 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
@@ -7,11 +7,11 @@ dashedName: step-2
 
 # --description--
 
-Replace the `pass` statement with a variable named `card_number` and a value of `4111-1111-4555-1142`.
+Replace the `pass` statement with a variable named `card_number` and a value of `'4111-1111-4555-1142'`.
 
 # --hints--
 
-You should have `card_number = "4111-1111-4555-1142"` within the `main` function.
+You should have `card_number = '4111-1111-4555-1142'` within the `main` function.
 
 ```js
 ({
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
index 71aea0f1ded..347825b25a1 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
@@ -13,7 +13,7 @@ The Luhn algorithm is as follows:
 
 1. From the right to left, double the value of every second digit; if the product is greater than 9, sum the digits of the products.
 2. Take the sum of all the digits.
-3. If the sum of all the digits is a multiple of `10`, then the number is valid; else it is not valid.
+3. If the sum of all the digits is a multiple of 10, then the number is valid; else it is not valid.
 
 Assume an example of an account number "7992739871" that will have a check digit added, making it of the form 7992739871x:
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
index a1e1529b8f5..29431c7e7e5 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
@@ -30,7 +30,7 @@ You should have `card_number_reversed = card_number[0:4]` within the `verify_car
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
index 17be693212a..d4f5413a978 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
@@ -20,7 +20,7 @@ You should have `odd_digits = card_number_reversed[::2]` within the `verify_card
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\[::2\]/);
+        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\s*\[\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
index 2ac210a8d4b..f484faeb14d 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
@@ -27,7 +27,7 @@ You should have `sum_of_odd_digits += int(digit)` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(digit\)/);
+        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(\s*digit\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
index 7f4ef81ea8b..e09f55dbe14 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
@@ -20,7 +20,7 @@ You should have `even_digits = card_number_reversed[1::2]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\[1::2\]/);
+        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\s*\[\s*1\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
index 23c8ebcdcd2..f0844f504ea 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
@@ -22,7 +22,7 @@ You should have `number = int(digit) * 2` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /number\s*=\s*int\(digit\)\s*\*\s*2/);
+        assert.match(function_body, /number\s*=\s*int\(\s*digit\s*\)\s*\*\s*2/);
     }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
index 5a1f9a4b845..d9e4745cd4b 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
@@ -30,8 +30,8 @@ You should have `number = number // 10 + number % 10` within the `if` statement.
         const verify_card_number = __helpers.python.getBlock("\n" + transformedCode, "if number >= 10");
         const { block_body } = verify_card_number;
         const allowedMatches = [
-            /number *= *\(?number *\/\/ *10\)? *\+ *\(?number *% *10/,
-            /number *= *\(?number *% *10\)? *\+ *\(?number *\/\/ *10/
+            /number *= *\(?\s*number *\/\/ *10\s*\)? *\+ *\(?\s*number *% *10/,
+            /number *= *\(?\s*number *% *10\s*\)? *\+ *\(?\s*number *\/\/ *10/
         ];
 
         const someMatch = allowedMatches.some(allowedMatch => allowedMatch.test(block_body));
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
index d726502047f..72b3a9ab973 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
@@ -7,7 +7,7 @@ dashedName: step-33
 
 # --description--
 
-Adjust the `verify_card_number` call such that if it returns `True`, print `VALID!` to the console. Otherwise, print `INVALID!`.
+Adjust the `verify_card_number` call such that if it returns `True`, print `'VALID!'` to the console. Otherwise, print `'INVALID!'`.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `if verify_card_number(translated_card_number):` within the `mai
 })
 ```
 
-You should have `print("VALID!")` within the `if` statement.
+You should have `print('VALID!')` within the `if` statement.
 
 ```js
 ({
@@ -40,7 +40,7 @@ You should have `print("VALID!")` within the `if` statement.
 })
 ```
 
-You should have `print("INVALID!")` within the `else` clause.
+You should have `print('INVALID!')` within the `else` clause.
 
 ```js
 ({
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
index 84c019fb681..cc3761a4547 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
@@ -7,7 +7,7 @@ dashedName: step-34
 
 # --description--
 
-Change the value of `card_number` such that `INVALID!` is printed to the console.
+Change the value of `card_number` such that `'INVALID!'` is printed to the console.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
index 038099661ef..3fed976211b 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
@@ -20,7 +20,7 @@ You should have `card_number_reversed = card_number[0:4:2]` within the `verify_c
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4:2\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
index cca28cbd963..74bfe60ab11 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
@@ -27,7 +27,7 @@ You should have `card_number_reversed = card_number[::-1]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[::-1\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*:\s*:\s*-1\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
index 6d93639c5b5..949ba06f9d8 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
@@ -10,10 +10,10 @@ dashedName: step-4
 A dictionary is another built-in data type in Python. A dictionary is a collection of data in the form of *key*-*value* pairs. Dictionaries are defined with curly braces `{}` and they contain key-value pairs separated by commas. Each key is followed by a colon `:` and the value:
 
 ```py
-{"amount": 50.0, "category": "Food"}
+{'amount': 50.0, 'category': 'Food'}
 ```
 
-In the example above, `amount` and `category` are keys, and `50.0` and `Food` are their the corresponding values.
+In the example above, `amount` and `category` are keys, and `50.0` and `'Food'` are their the corresponding values.
 
 Create a dictionary with a key `amount` and value of the `amount` parameter and pass your new dictionary to the `.append()` call.
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
index 339683af751..aa237f67ad8 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `category` as the key, and the `category` parameter as the value.
+Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `'category'` as the key, and the `category` parameter as the value.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
index 9f402341cc7..464947a157e 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
@@ -10,11 +10,11 @@ dashedName: step-9
 You can access values in a dictionary through its keys. You need to use the bracket notation and include the key between the square brackets:
 
 ```py
-my_dict = {"amount": 50.0, "category": "Food"}
-my_dict["amount"] # 50.0
+my_dict = {'amount': 50.0, 'category': 'Food'}
+my_dict['amount'] # 50.0
 ```
 
-You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `amount` key and the `category` key in the `expense` dictionary.
+You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `'amount'` key and the `'category'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
index 2c00de880d2..500990670ee 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
@@ -13,7 +13,7 @@ Lambda functions are brief, anonymous functions in Python, ideal for simple, one
 lambda x: expr
 ```
 
-In the example above, `x` is a parameter to be use in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
+In the example above, `x` is a parameter to be used in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
index 538717f1466..b0851b9e432 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `amount` key in the `expense` dictionary.
+Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `'amount'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
index be833c137d0..74d529af0d5 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `category` key of the `expense` dictionary and `category`.
+Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `'category'` key of the `expense` dictionary and `category`.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
index 50175b475f9..154c593e836 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
@@ -23,7 +23,7 @@ You should define a function named `main()` without parameters.
 })
 ```
 
-You should move the `expense` list inside the `main()` function body.
+You should move the `expenses` list inside the `main()` function body.
 
 ```js
 ({ test: () => assert(__pyodide.runPython(`
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
index f23bb3c55fa..da5f6d91adc 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
@@ -14,7 +14,7 @@ while condition:
     <code>
 ```
 
-Below the `expense` list, create a `while` loop. Use `True` for the condition, and print the string `\nExpense Tracker` inside the loop body to show the title of the program.
+Below the `expenses` list, create a `while` loop. Use `True` for the condition, and print the string `'\nExpense Tracker'` inside the loop body to show the title of the program.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
index bd56507e5a1..0f447b5eb4d 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
@@ -9,7 +9,7 @@ dashedName: step-25
 
 The `while` loop you created in the previous step is an infinite loop that will allow the program to continuously present menu options until the user decides to exit.
 
-After the `print()` call, add another one to print the string `1. Add an expense`.
+After the `print()` call, add another one to print the string `'1. Add an expense'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
index 1046f822389..29575b7375a 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
@@ -7,7 +7,7 @@ dashedName: step-26
 
 # --description--
 
-Next, add another `print()` call and pass the string `2. List all expenses`.
+Next, add another `print()` call and pass the string `'2. List all expenses'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
index 828c1ec26a9..d6b34082931 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
@@ -7,7 +7,7 @@ dashedName: step-27
 
 # --description--
 
-Provide the other menu options by printing the following three strings in your `while` loop: `3. Show total expenses`, `4. Filter expenses by category`, and `5. Exit`.
+Provide the other menu options by printing the following three strings in your `while` loop: `'3. Show total expenses'`, `'4. Filter expenses by category'`, and `'5. Exit'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
index 1792e9f9265..24c27b6240f 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
@@ -9,7 +9,7 @@ dashedName: step-28
 
 The `input()` function takes a user input and it returns the user input in the form of a string.
 
-Inside your `while` loop, call the `input()` function passing the string `Enter your choice:` as the argument, and assign the result to a variable named `choice`.
+Inside your `while` loop, call the `input()` function passing the string `'Enter your choice: '` as the argument, and assign the result to a variable named `choice`.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
index 9d691e25440..057a242e95d 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
@@ -7,9 +7,9 @@ dashedName: step-29
 
 # --description--
 
-You are going to use conditional statements to check the user's choice. If the choice is `1`, it means the user wants to add an expense.
+You are going to use conditional statements to check the user's choice. If the choice is `'1'`, it means the user wants to add an expense.
 
-Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `1`. If it's true, it will be the starting point for adding a new expense.
+Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `'1'`. If it's true, it will be the starting point for adding a new expense.
 
 Inside the `if` statement body, declare a variable `amount` and assign it an empty `input()` call.
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
index 47850951cb6..4921c9fec96 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
@@ -9,7 +9,7 @@ dashedName: step-30
 
 Inside the `if` statement, you should ask the user to enter the amount for the expense and store it in a variable.
 
-Pass the string `Enter amount:` to your empty `input()` call, so you can store the expense.
+Pass the string `'Enter amount: '` to your empty `input()` call, so you can store the expense.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
index a097ff1e04f..f812abc230b 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
@@ -9,7 +9,7 @@ dashedName: step-34
 
 To list all expenses, you can use an `elif` statement after an `if` statement. The `elif` checks additional conditions and only works following an `if` statement.
 
-Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `\nAll Expenses:`.
+Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `'\nAll Expenses:'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
index 871cf1d5fd5..66425d6b4d3 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
@@ -9,7 +9,7 @@ dashedName: step-36
 
 To show the total expenses, create an `elif` statement that checks if `choice == '3'`.
 
-If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `\nTotal Expenses:` as the first argument and `total_expenses(expenses)` as the second argument.
+If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `'\nTotal Expenses: '` as the first argument and `total_expenses(expenses)` as the second argument.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
index 41b46e56eab..fa717dded06 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
@@ -7,9 +7,9 @@ dashedName: step-41
 
 # --description--
 
-To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `5`.
+To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `'5'`.
 
-Inside the new `elif` statement, print the string `Exiting the program.` to show that the program is terminating its execution.
+Inside the new `elif` statement, print the string `'Exiting the program.'` to show that the program is terminating its execution.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `elif choice == '5':` in your code.
 })
 ```
 
-You should print `Exiting the program.` in your new `elif` statement.
+You should print `'Exiting the program.'` in your new `elif` statement.
 
 ```js
 ({ test: () =>
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
index d6a3c910ecd..e196e1267d8 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
@@ -22,7 +22,7 @@ You should replace `pass` with an empty list named `snake_cased_char_list` withi
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\]/);
+        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\s*\]\s*/);
     }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
index 626857fe32a..b8c5c5f836f 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
@@ -34,7 +34,7 @@ You should use the `.append()` method to add `char` to the `snake_cased_char_lis
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list.append\(char\)/);
+        assert.match(function_body, / +snake_cased_char_list.append\(\s*char\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
index 9d978c9aef6..093c80c11c4 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
@@ -7,11 +7,11 @@ dashedName: step-12
 
 # --description--
 
-Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `aLongAndComplexString` as input to the function and print out the output using the `print()` function.
+Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `'aLongAndComplexString'` as input to the function and print out the output using the `print()` function.
 
 # --hints--
 
-You should call `convert_to_snake_case()` inside the `main()` function and pass `aLongAndComplexString` as input to the function.
+You should call `convert_to_snake_case()` inside the `main()` function and pass `'aLongAndComplexString'` as input to the function.
 
 ```js
 ({
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
index 0f2a36cf317..27eb18d01ec 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
@@ -7,7 +7,7 @@ dashedName: step-22
 
 # --description--
 
-Finally try out this new implementation by executing the program. Change the input string to `IAmAPascalCasedString` and see if it comes out as `i_am_a_pascal_cased_string`, even though that's a lie.
+Finally try out this new implementation by executing the program. Change the input string to `'IAmAPascalCasedString'` and see if it comes out as `'i_am_a_pascal_cased_string'`, even though that's a lie.
 
 If you've done everything correctly, you should see the input string converted into snake case, like before.
 
@@ -15,7 +15,7 @@ Congratulations! Now your `convert_to_snake_case()` function is ready.
 
 # --hints--
 
-You should change the input string from `aLongAndComplexString` to `IAmAPascalCasedString` inside the `main()` function.
+You should change the input string from `'aLongAndComplexString'` to `'IAmAPascalCasedString'` inside the `main()` function.
 
 ```js
 ({
@@ -24,7 +24,7 @@ You should change the input string from `aLongAndComplexString` to `IAmAPascalCa
         const main = __helpers.python.getDef("\n" + transformedCode, "main");
         const { function_body } = main;
 
-        assert.match(function_body, / +print\(convert_to_snake_case\('IAmAPascalCasedString'\)\)/);
+        assert.match(function_body, / +print\(\s*convert_to_snake_case\(\s*'IAmAPascalCasedString'\s*\)\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
index 28bc5e2bc18..dca67819567 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
@@ -7,9 +7,9 @@ dashedName: step-3
 
 # --description--
 
-The puzzle starts with the disks piled up on the first rod, in decreasing size. You need to populate your first list with numbers representing the various disk sizes.
+The puzzle starts with the disks piled up on the first rod, in decreasing size, with the smallest disk on top and the largest disk on the bottom. You need to populate your first list with numbers representing the various disk sizes.
 
-Instead of adding the items manually to the first list, generate a sequence of numbers from `3` to `1` by using the `range()` function and assign it to `rods['A']`.
+Instead of adding the items manually to the first list, generate a sequence of numbers counting down from `3` to `1` by using the `range()` function and assign it to `rods['A']`. Here, `3` represents the largest disk at the bottom of the pile and `1` represents the smallest disk at the top of the pile.
 
 The syntax is `range(x, y, h)`, where `x` is the starting integer (inclusive), `y` is the last integer (not inclusive), and `h` is the difference between a number and the next one in the sequence.
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
index f4219a2589c..946c198d8a9 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
@@ -14,13 +14,13 @@ Now check the data type of your `'A'` key by passing it to the `type()` function
 You should pass your `'A'` key to the `type()` function.
 
 ```js
-({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)/) })
+({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)/) })
 ```
 
 You should print the type of `rods['A']` using the `print()` function.
 
 ```js
-({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)\s*\)/) })
+({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
index e343b6213a9..12f8825eb63 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
@@ -14,7 +14,7 @@ Now that the type is `list` as required, you can remove the `print()` call.
 You should remove `print(type(rods['A']))` from your code.
 
 ```js
-({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
+({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
index 2b67bab3b86..65be4aa7dbf 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
@@ -9,7 +9,7 @@ dashedName: step-16
 
 At the end of this project, you will create a recursive solution to the Tower of Hanoi puzzle, but now you are going to explore an iterative approach to this problem.
 
-Start by adding a `for` loop to your function that iterates through the number of moves and prints the current iteration number.
+Start by adding a `for` loop to your function that iterates through the `number_of_moves` and prints the current iteration number.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
index 7001b4d4230..e3fd5dca388 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `A` and `B` (the source and the auxiliary rods).
+When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `'A'` and `'B'` (the source and the auxiliary rods).
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
index dc2942adc95..66c448f3267 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
@@ -7,7 +7,7 @@ dashedName: step-21
 
 # --description--
 
-Finally, when the move number divided by 3 has no remainder, the movement is allowed between `B` and `C`.
+Finally, when the move number divided by 3 has no remainder, the movement is allowed between `'B'` and `'C'`.
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
index a005304a820..41fbaea3c7d 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
@@ -18,10 +18,10 @@ You should have an `elif` statement to check if `rods[source]` is not empty and
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:`);
 assert.match(code, re);
 ```
 
@@ -30,10 +30,10 @@ You should set `forward` to `True` inside your new `elif` statement. You should
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
 assert.match(code, re);
 ```
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
index 3bb94e18236..cdc1479dbf7 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
@@ -20,7 +20,7 @@ You should add an `if` statement to execute when `forward` is `True` after the `
 You should print the provide string inside your new `if` statement.
 
 ```js
-({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
+({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
index e6589376ba2..6abf4aa9b1e 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
@@ -14,13 +14,13 @@ After printing the move, you need to remove the last element from the source rod
 You should remove the last element from `rods[source]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[target].append(rods[source].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
index ebaf5e1bacc..0d2c51d37a5 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
@@ -14,25 +14,25 @@ When `forward` is `False`, the disk has to be moved in the opposite direction. W
 You should have an `else` clause to move the disks in the opposite direction.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
 ```
 
 You should have `print(f'Moving disk {rods[target][-1]} from {target} to {source}')` inside your `else` clause.
 
 ```js
-({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
+({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
 ```
 
 You should remove the last element from `rods[target]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[source].append(rods[target].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
index 327b62a6954..99cb27ad195 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
@@ -14,13 +14,13 @@ Outside the `else` block, add a comment saying `display our progress` and print
 You should use the provided text to add a comment outside the `else` block.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
 ```
 
 You should print the `rods` object outside the `else` block, after the comment.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
index 5ea273e7e77..cc781fd39a1 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
@@ -15,7 +15,7 @@ You should move the code nested inside the first `if` statement (except the firs
 
 ```js
 ({ test: () => {
-  assert.match(code, /def\s+make_allowed_move\(rod1, rod2\):\s+forward\s+=\s+False\s+if\s+not\s+rods\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\[\s*source\s*\]\s+and\s+rods\[\s*source\s*\]\[-1\]\s<\srods\[\s*target\s*\]\[\s*-\s*1\s*\]:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\[\s*source\s*\].append\(\s*rods\[\s*target\s*\].pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+\print\(\s*rods\s*\)/);
+  assert.match(code, /def\s+make_allowed_move\(\s*rod1, rod2\s*\):\s+forward\s+=\s+False\s+if\s+not\s+rods\s*\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\s*\[\s*source\s*\]\s+and\s+rods\s*\[\s*source\s*\]\s*\[\s*-1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\s*\[\s*source\s*\]\s*\.append\(\s*rods\s*\[\s*target\s*\]\s*\.pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\(\s*rods\s*\)/);
   }
 })
 ```
@@ -47,7 +47,7 @@ def move(n, source, auxiliary, target):
             if not rods[target]:
                 forward = True
             elif rods[source] and rods[source][-1] < rods[target][-1]:
-                forward = True              
+                forward = True
             if forward:
                 print(f'Moving disk {rods[source][-1]} from {source} to {target}')
                 rods[target].append(rods[source].pop())
@@ -57,7 +57,7 @@ def move(n, source, auxiliary, target):
 
             # display our progress
             print(rods)
---fcc-editable-region--            
+--fcc-editable-region--
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
         elif remainder == 0:
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
index f9f29f29716..c0c6aa2c1ad 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
@@ -15,11 +15,11 @@ You should change each occurrence of `source` inside the `make_allowed_move()` f
 
 ```js
 ({ test: () => {
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
index 13b9bfe88ec..3d9f6237bb1 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
@@ -16,11 +16,11 @@ You should change each occurrence of `target` inside `make_allowed_move` into `r
 ```js
 ({ test: () => {
   assert.match(code, /if\s+not\s+rods\s*\[\s*rod2\s*\]\s*:/);
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\[\s*rod2\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*rod2\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\s*\[\s*rod2\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod2\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
index 653d334dd88..7264d9764c9 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
@@ -11,7 +11,7 @@ It looks like it's working! But the output is not very readable. Print a new lin
 
 # --hints--
 
-You should pass a string with a new line character (`\n`) as the second argument for your two `print(rods)` calls.
+You should pass a string with a new line character (`'\n'`) as the second argument for your two `print(rods)` calls.
 
 ```js
 ({ test: () => assert.match(code, /print\(\s*rods\s*,\s*('|")\\n\1\s*\)(?=.*print\(\s*rods\s*,\s*('|")\\n\2\s*\))/s) })
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
index 89f3c095cf1..e155ffd6e66 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
@@ -16,7 +16,7 @@ For now, each recursive call prints the `rods` dictionary without performing any
 You should remove the last element from the `rods[source]` list and append it to the `rods[target]` list before the `print` call.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
index d272b33c734..5e81c987df4 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
@@ -14,7 +14,7 @@ Before appending the last element to the target, add a comment saying `move the
 You should add a comment with the provided text before `rods[target].append(rods[source].pop())`.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\))/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
index 73273bcb58a..9a21a68b2ee 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Although recursion could sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
+Although recursion can sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
 
 Set `NUMBER_OF_DISKS` to `5` and check the output.
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
index e7afef8a433..55b752fc41c 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
@@ -21,7 +21,7 @@ You should delete the last three lines in your code.
 ({ test: () => {
   assert.isFalse(/pattern\s*=\s*r("|')\\W\1/.test(code));
   assert.isFalse(/quote\s*=\s*("|')_\1/.test(code));
-  assert.isFalse(/print\(re\.findall\(pattern, quote\)\)/.test(code));
+  assert.isFalse(/print\(\s*re\.findall\(\s*pattern, quote\s*\)\s*\)/.test(code));
 }})
 ```
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
index 8e4eac9be16..a2d680aa077 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
@@ -14,7 +14,7 @@ Now, turn the empty string in the constraint tuple into a regex pattern to match
 You should have the `(nums, '[0123456789]')` tuple in your `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
+({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
index e383ca652e0..6ee9493745e 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
@@ -27,7 +27,7 @@ You should replace your existing `for` loop and two `if` statements with a singl
 Your new `if` condition should be a list comprehension that is the result of evaluating the expression `constraint <= len(re.findall(pattern, password))` for each `constraint`-`pattern` tuple in the `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /^(\s{8})if\s+\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
+({ test: () => assert.match(code, /^(\s{8})if\s*\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
index 5a7a8e606dd..af8729c1d0b 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
@@ -1,6 +1,6 @@
 ---
 id: 6551ecf597038c36637f3759
-title: Step 1
+title: Schritt 1
 challengeType: 20
 dashedName: step-1
 ---
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
index 2e6d119b78b..13c803a3211 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
@@ -1,6 +1,6 @@
 ---
 id: 6551eebe6cbb2e6cadf9b468
-title: Step 2
+title: Schritt 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -15,7 +15,7 @@ string_2 = 'I am also a string'
 string_3 = 'This is not valid"
 ```
 
-Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `Hello World` to this variable.
+Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `'Hello World'` to this variable.
 
 # --hints--
 
@@ -32,7 +32,7 @@ You should declare a variable called `text`. Pay attention to place the variable
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello World` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
+You should assign the string `'Hello World'` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello World\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
index d40877ed6af..2b65b4b4212 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
@@ -14,7 +14,7 @@ greet = 'Hello!'
 print(greet)
 ```
 
-The code in the example above would print the string `Hello!`, which is the value of the variable `greet` passed to `print()` as the argument.
+The code in the example above would print the string `'Hello!'`, which is the value of the variable `greet` passed to `print()` as the argument.
 
 Print your `text` variable to the screen by passing the `text` variable as the argument to the `print()` function.
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
index 86104aff4f6..7c28d74b6b7 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `Hello World`, `H` is at index `0`, `e` is at index `1`, and so on. 
+Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `'Hello World'`, `'H'` is at index `0`, `'e'` is at index `1`, and so on.
 
 Each character of a string can be accessed by using bracket notation. You need to write the variable name followed by square brackets and add the index of the character between the brackets:
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
index 5d0ae1dd2fa..3103cb653bf 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-You can see `11` printed on the terminal because `Hello World` contains 11 characters.
+You can see `11` printed on the terminal because `'Hello World'` contains 11 characters.
 
 Another useful built-in function is `type()`, which returns the data type of a variable. Modify your `print()` call to print the data type of `text`.
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
index cedb112a823..074c15b2e19 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
@@ -14,7 +14,7 @@ Key aspects of variable naming in Python are:
 - Variable names are case sensitive, i.e. `my_var` is different from `my_Var` and `MY_VAR`.
 - Finally, it is a common convention to write variable names using `snake_case`, where each space is replaced by an underscore character and the words are written in lowercase letters.
 
-Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `abcdefghijklmnopqrstuvwxyz` to this variable.
+Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `'abcdefghijklmnopqrstuvwxyz'` to this variable.
 
 # --hints--
 
@@ -38,7 +38,7 @@ You should declare a variable called `alphabet`. Pay attention to place the vari
 assert.match(code, /^alphabet\s*=/m)
 ```
 
-You should assign the string `abcdefghijklmnopqrstuvwxyz` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
+You should assign the string `'abcdefghijklmnopqrstuvwxyz'` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
 
 ```js
 assert.match(code, /^alphabet\s*=\s*("|')abcdefghijklmnopqrstuvwxyz\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
index abe8ced263d..5c272b6d6f1 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
@@ -15,7 +15,7 @@ Start by finding the position of the first letter in the string. One way is to c
 text.find('W')
 ```
 
-Above, uppercase `W` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `W` character inside the string stored in the `text` variable.
+Above, uppercase `'W'` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `'W'` character inside the string stored in the `text` variable.
 
 At the end of your code, call `.find()` on your `alphabet` string and pass `text[0]` to the method. Note that a method is just a function that belongs to an object (you will learn more about that in another project).
 
@@ -36,7 +36,7 @@ assert.match(code, /alphabet\.find\s*\(.*\)/)
 You should call the `.find()` method on the `alphabet` variable and pass `text[0]` to the method. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)/m)
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 412619ccc4c..3e3af82109c 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -22,7 +22,7 @@ assert.match(code, /^index\s*=/m)
 You should assign the value returned by `alphabet.find(text[0])` to your `index` variable.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 34166fe3da4..83feddb9318 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `H`, is not found, since `alphabet` contains only lowercase letters.
+`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `'H'`, is not found, since `alphabet` contains only lowercase letters.
 
 You can transform a string into its lowercase equivalent with the `.lower()` method. Add another `print()` call to print `text.lower()` and see the output.
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index 54d47cf3f49..9a554ddeef1 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -27,7 +27,7 @@ assert.match(code, /^print\s*\(\s*index\s*\)/m);
 You should update your `alphabet.find(text[0])` call to use `text[0].lower()` as the argument. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index 95e2567fa84..e4c0036ebff 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-As you can see from the output, `h` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
+As you can see from the output, `'h'` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
 
 Modify your `shifted` variable so that it stores the value of `alphabet` at index `index + shift`.
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index 41811515713..a8da79ffd22 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -35,14 +35,14 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i/m)
 ```
 
-You should write the `in` keyword after `for i `. Make sure to leave a space around the `in` keyword.
+You should write the `in` keyword after `for i`. Make sure to leave a space around the `in` keyword.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i\s+in\s+/m)
 ```
 
-You should write `text` after `for i in `. Don't forget to add the final `:`.
+You should write `text` after `for i in`. Don't forget to add the final `:`.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index b7051de41c3..bdf47ed7c6f 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -7,7 +7,7 @@ dashedName: step-42
 
 # --description--
 
-Currently, spaces get encrypted as `c`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
+Currently, spaces get encrypted as `'c'`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
 
 ```py
 if x != 0:
@@ -16,7 +16,7 @@ if x != 0:
 
 In the example above, the condition of the `if` statement is `x != 0`. The code `print(x)`, inside the `if` statement body, runs only when the condition evaluates to `True` (in this example, meaning that `x` is different from zero).
 
-At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `space!`. Remember to indent this line.
+At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `'space!'`. Remember to indent this line.
 
 # --hints--
 
@@ -36,7 +36,7 @@ const {block_body} = __helpers.python.getBlock(commentless_code, /for\s+char\s+i
 assert(block_body.match(/if\s+char\s*==\s*("|')\s\1\s*:/));
 ```
 
-You should print the string `space!` inside your new `if` statement.
+You should print the string `'space!'` inside your new `if` statement.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index 69191130521..f3fc108e506 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, instead of printing `space!`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
+Now, instead of printing `'space!'`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index dfc91239b0e..f6ea23b4325 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Try to assign the string `Hello Zaira` to your `text` variable and see what happens in the console.
+Try to assign the string `'Hello Zaira'` to your `text` variable and see what happens in the console.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have a `text` variable.
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello Zaira` to your `text` variable.
+You should assign the string `'Hello Zaira'` to your `text` variable.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello\sZaira\1/m)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index 5629c8d00fb..b5f4088d3b7 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -7,7 +7,7 @@ dashedName: step-58
 
 # --description--
 
-Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `python` to this variable.
+Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `'python'` to this variable.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should declare a variable called `custom_key`.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should assign the string `python` to your `custom_key` variable.
+You should assign the string `'python'` to your `custom_key` variable.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "python") })
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 179f7313a5d..47211f5e8bc 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -7,8 +7,7 @@ dashedName: step-59
 
 # --description--
 
-Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text.
-At the beginning of your function body, declare a `key_index` variable and set it to zero.
+Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text. At the beginning of your function body, declare a `key_index` variable and set it to zero.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 660fb4ab263..7e452e05438 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
 
     for char in message.lower():
 --fcc-editable-region--
-        
+
         if char == ' ':
             encrypted_text += char
 --fcc-editable-region--            
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7727f6c57a8..7ca155b0c73 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -7,8 +7,7 @@ dashedName: step-62
 
 # --description--
 
-You will need to increase the `key_index` count for the next iteration.
-To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
+You will need to increase the `key_index` count for the next iteration. To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index 67567e88cdf..a6cd4a9a348 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
         if char == ' ':
             encrypted_text += char
         else:
-            
+
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index da202c1490a..7ca3ec197c0 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -50,7 +50,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key):
             # Find the right key character to encode
             key_char = key[key_index % len(key)]
             key_index += 1
-            
+
 --fcc-editable-region--            
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index 7ca7c2f323a..f783cbf3472 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -32,7 +32,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -41,7 +41,7 @@ def vigenere(message, key):
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
-            
+
             offset = alphabet.index(key_char)
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index a371865b1ef..28c793c06c3 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -55,7 +55,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index 60289b5525e..acf5b0f71c8 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -43,7 +43,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -57,7 +57,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index b1f7c3a5caa..87f8a5aa7f3 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -31,7 +31,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 534ff69ec91..84f3a8477e1 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -46,7 +46,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -60,9 +60,9 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 --fcc-editable-region--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index 3dfdd998a92..d29b009f3cf 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -47,9 +47,9 @@ def vigenere(message, key, direction):
             new_index = (index + offset) % len(alphabet)
 --fcc-editable-region--
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 #encryption = vigenere(text, custom_key)
 #print(encryption)
 ```
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 330871bc52a..9f1ea94390c 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,9 +45,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 --fcc-editable-region--
 #encryption = vigenere(text, custom_key)
 #print(encryption)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index db2c5bdfe33..adf869e6b5f 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index b4b329858a2..8e744b4c09f 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index f49b76f417f..cd7e9ce3a58 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -39,7 +39,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -53,7 +53,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index b295655e5c6..a6ecf2194d0 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -38,7 +38,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -52,9 +52,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index 521f1f961d3..d77bcd5d985 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -19,7 +19,7 @@ You should have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should be equal to the string `Hello Zaira!`.
+Your `text` variable should be equal to the string `'Hello Zaira!'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "Hello Zaira!") })
@@ -40,7 +40,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -54,9 +54,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index f9dfeed2c7d..a60afdc14cc 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -53,9 +53,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index fa8531f3421..40bfdb53982 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -48,9 +48,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index aba2d5665d2..822b22f2743 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -46,9 +46,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index a8a4a146373..82df5c7e409 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -70,7 +70,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index 900a42440bf..ceda0450cc8 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -51,7 +51,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index b37f689c14a..c0d946a1d38 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index d863b1b5667..e86470c6c34 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -51,15 +51,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index e7e001fd7b2..cb2c9d5e191 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -9,7 +9,7 @@ dashedName: step-86
 
 It works! Now, you are going to start with an encrypted message to be decrypted.
 
-Change the value of `text` to the string `mrttaqrhknsw ih puggrur`.
+Change the value of `text` to the string `'mrttaqrhknsw ih puggrur'`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should still have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should have the value of `mrttaqrhknsw ih puggrur`.
+Your `text` variable should have the value of `'mrttaqrhknsw ih puggrur'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "mrttaqrhknsw ih puggrur") })
@@ -54,15 +54,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = encrypt(text, custom_key)
 print(encryption)
 decryption = decrypt(encryption, custom_key)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index 7295239a2e5..a2e43552133 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -46,7 +46,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -60,9 +60,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 582c138e1b3..3cfffa05b63 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index 43650a129a7..b809b6cc227 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -9,11 +9,11 @@ dashedName: step-88
 
 Two or more strings can be concatenated by using the `+` operator. For example: `'Hello' + ' there!'` results in `'Hello there!`.
 
-Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `Encrypted text: `. Pay attention to the spacing.
+Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `'Encrypted text: '`. Pay attention to the spacing.
 
 # --hints--
 
-You should call `print()` and pass `'Encrypted text: ' + text` as the arguments. 
+You should call `print()` and pass `'Encrypted text: ' + text` as the arguments.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--    
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index 68b96128144..bb3bf128cf9 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -7,11 +7,11 @@ dashedName: step-89
 
 # --description--
 
-Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 # --hints--
 
-You should have a `print()` call that prints `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+You should have a `print()` call that prints `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -52,12 +52,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index e52496dd150..6d5c9a3c856 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -7,7 +7,7 @@ dashedName: step-90
 
 # --description--
 
-In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings. 
+In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings.
 
 Interpolation means writing placeholders that will be replaced by the specified values when the program runs. For example, you can get the same result of `'Encrypted text: ' + text` with `f'Encrypted text: {text}'`. You need to put an `f` before the quotes to create the f-string and write the variables or expressions you want to interpolate between curly braces.
 
@@ -49,12 +49,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index ebdb8b79456..4e28d4737fc 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index 8e107b0fff4..d55577ba1cf 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -47,12 +47,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 0f916bf649e..073dfdcd2bb 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -50,12 +50,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 23af806c5ce..006a04850ea 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -7,7 +7,7 @@ dashedName: step-95
 
 # --description--
 
-Wait a minute! You cannot decrypt anything with the wrong key. Try with `happycoding`.
+Wait a minute! You cannot decrypt anything with the wrong key. Try with `'happycoding'`.
 
 With that, your cipher project is complete.
 
@@ -19,7 +19,7 @@ You should still have a `custom_key` variable.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should modify the `custom_key` value into `happycoding`.
+You should modify the `custom_key` value into `'happycoding'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "happycoding") })
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
@@ -96,12 +96,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 05c44517e6f..9a4c27f1945 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -7,8 +7,7 @@ dashedName: step-41
 
 # --description--
 
-Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare.
-They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
+Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare. They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
 
 Python has the following comparison operators:
 
@@ -47,11 +46,11 @@ Python has the following comparison operators:
   </tbody>
 </table>
 
-At the beginning of your loop body, print the result of comparing `char` with an empty space (`' '`). Use the equality operator `==` for that.
+At the beginning of your loop body, print the result of comparing `char` with a space (`' '`). Use the equality operator `==` for that.
 
 # --hints--
 
-You should compare `char` with an empty space using the equality operator inside your `for` loop.
+You should compare `char` with a space using the equality operator inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -62,7 +61,7 @@ You should compare `char` with an empty space using the equality operator inside
 })
 ```
 
-You should print the result of comparing `char` with an empty space inside your `for` loop.
+You should print the result of comparing `char` with a space inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -73,7 +72,7 @@ You should print the result of comparing `char` with an empty space inside your
 })
 ```
 
-You should print the result of comparing `char` with an empty space at the beginning of your loop.
+You should print the result of comparing `char` with a space at the beginning of your loop.
 
 ```js
 ({ test: () => {
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 34e53a7cc4f..745930f7cc7 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -18,7 +18,7 @@ Give your `for` loop a body by adding a call to `print(i)`. Remember to indent t
 
 # --hints--
 
-You should add `print(i)` to your `for` loop body. Pay attention to the indentation. 
+You should add `print(i)` to your `for` loop body. Achte auf die Einrückung.
 
 ```js
 assert.match(code, /^for\s+i\s+in\s+text:\s+print\s*\(\s*i\s*\)/m)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index e7886b5f796..042349ee0a4 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -15,7 +15,7 @@ Restore the indentation for your `print(i)` call.
 
 # --hints--
 
-You should indent `print(i)` inside your `for` loop body. 
+You should indent `print(i)` inside your `for` loop body.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index 6215b77a724..f971dfe2276 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -13,7 +13,7 @@ Rename your `i` variable to `char`.
 
 # --hints--
 
-You should replace `i` with `char`. 
+You should replace `i` with `char`.
 
 ```js
 assert.match(code, /^for\s+char\s+in\s+text:\s+print\s*\(\s*char\s*\)/m)
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index b2203350e08..97fee73da43 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -7,7 +7,7 @@ dashedName: step-31
 
 # --description--
 
-Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `train`, but this is not valid:
+Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `'train'`, but this is not valid:
 
 ```py
 my_string = 'brain'
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index 39784236282..e2b04ef618e 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -14,7 +14,7 @@ message = 'Hello World'
 message = 'Hello there!'
 ```
 
-Delete the `text[0]` line and reassign `text` the string `Albatross`.
+Delete the `text[0]` line and reassign `text` the string `'Albatross'`.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*\[\s*0\s*\]\s*\=\s*("|')\w\1/.test(commentless_code));
 ```
 
-You should reassign `text` the string `Albatross`. Do not modify `text = 'Hello World'`.
+You should reassign `text` the string `'Albatross'`. Do not modify `text = 'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 076a71f8786..6b04513e34d 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -20,7 +20,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*=\s*("|')Albatross\1/.test(commentless_code))
 ```
 
-You should still have a `text` variable with the value `Hello World`.
+You should still have a `text` variable with the value `'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index 442d9c6cb33..a98c25c7099 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index 71e999219ba..d239d653b25 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
index 2ba50b398f8..ca5f1126eba 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
@@ -16,13 +16,13 @@ Delete `pass` and recursively call the `_insert` method on the left child of the
 You should call the `self._insert` method passing `node.left` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the `left` attribute of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
index 6ab4885ed85..0306d6d9a9d 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
@@ -14,13 +14,13 @@ Inside your `elif` clause, replace `pass` with a call to the `_insert` method on
 You should call the `self._insert()` method passing `node.right` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the right attribute (`node.right`) of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
index d4a521194d3..5f651e660a7 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
@@ -25,7 +25,7 @@ You should call the `_search` method within the `search` method.
 You should call the `_search` method passing `self.root` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
index bf4fb51eaef..6adbef6d08d 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
@@ -14,7 +14,7 @@ Now, make the `search` method return the result of the `_search()` call.
 You should prepend the `return` statement to your `_search()` call.
 
 ```js
-({ test: () => assert.match(code, /return\s+self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /return\s+self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
index 89bd06a9a1e..47736ff04b5 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
@@ -22,8 +22,8 @@ assert.match(after_split, /if\s+key\s+<\s+node\.key/);
 
 You should return `self._search(node.left, key)` from your new `if` block.
 
-```js    
-({ test: () => assert.match(code, /return\s+self\._search\(node\.left,\s*key\)/) });    
+```js
+({ test: () => assert.match(code, /return\s+self\._search\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
index 845fb1ee3c7..50bcaf13675 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
@@ -25,14 +25,14 @@ assert.match(after_split, /self\._search/);
 You should pass two arguments to the call of the `_search` method: `node.right` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should return the result of the `_search` method call.
 
 ```js
 ({
-  test: () => assert.match(code, /return\s+self\._search\(node\.right,\s*key\)/)
+  test: () => assert.match(code, /return\s+self\._search\(\s*node\.right,\s*key\s*\)/)
 });
 ```
 
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
index 2388a5f10ad..3bdf051b3c3 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
@@ -18,7 +18,7 @@ Within the `BinarySearchTree` class, define a `delete` method. It takes two para
 You should define a `delete` method with two parameters: `self` and `key`. Denke daran, `pass` zu verwenden.
 
 ```js
-({ test: () => assert.match(code, /def\s+delete\(self,\s*key\)/) });
+({ test: () => assert.match(code, /def\s+delete\(\s*self,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
index 84c86b525f4..65b3a54e3ce 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
@@ -14,7 +14,7 @@ Inside the `delete` method, delete `pass` and call the private helper method `_d
 Your `delete` method should call the `_delete` method with two arguments: `self.root` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
index de38312e870..398e82f83e4 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
@@ -16,7 +16,7 @@ To handle this case, assign the result of the `_delete` call to `self.root`.
 You should assign the result of the `_delete()` call to `self.root`.
 
 ```js
-({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
index cca9cbd7659..c0f5ff4c7d3 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
@@ -14,7 +14,7 @@ Inside the `BinarySearchTree` class, define a new helper method called `_delete`
 You should define the `_delete` method inside the `BinarySearchTree` class with the parameters `self`, `node` and `key`. Remember to use the `pass` keyword.
 
 ```js
-assert.match(code, /def\s+_delete\(self,\s*node,\s*key\)/);
+assert.match(code, /def\s+_delete\(\s*self,\s*node,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
index 3ccb78b6862..250680df90b 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
@@ -14,13 +14,13 @@ Within the `if` block, replace `pass` with a call to the `_delete` method, passi
 You should call the `_delete` method with `node.left` and the `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to the left child (`node.left`) of the current node.
 
 ```js
-assert.match(code, /node\.left\s*=\s*self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /node\.left\s*=\s*self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
index a253dab7212..b4e28aa2dc0 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
@@ -23,13 +23,13 @@ assert.match(after_split, /elif\s+key\s+>\s+node\.key/);
 You should call the `_delete` method with `node.right` and `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to `node.right`.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
index e6ce8246f1d..54267eb50fe 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
@@ -20,7 +20,7 @@ For now, add a `_min_value` call after your `elif` block, passing `node.right` a
 You should assign `self._min_value(node.right)` to `node.key` after your `elif` block.
 
 ```js
-assert.match(code, /node\.key\s*=\s*self\._min_value\(node\.right\)/);
+assert.match(code, /node\.key\s*=\s*self\._min_value\(\s*node\.right\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
index 3813f932a19..3538b5b65b7 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
@@ -22,7 +22,7 @@ assert.match(code, /self\._delete\(\s*node\.right\s*,\s*node\.key\s*/);
 You should assign the return value of the `_delete()` call to the right child of the current node.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right\,\s*node\.key/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right\,\s*node\.key/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
index b600829b995..79119017040 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
@@ -16,7 +16,7 @@ This will start the traversal from the root of the binary search tree (`self.roo
 You should call `_inorder_traversal` and pass `self.root` and `result` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._inorder_traversal\(self\.root,\s*result\)/) })
+({ test: () => assert.match(code, /self\._inorder_traversal\(\s*self\.root,\s*result\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
index 699435a69c0..681cdceecdb 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
@@ -14,7 +14,7 @@ Define the `_inorder_traversal` method and give it three parameters: `self`, `no
 You should define a method `_inorder_traversal` that takes three parameters: `self`, `node`, and `result`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+_inorder_traversal\(self,\s*node,\s*result\)/);
+assert.match(code, /def\s+_inorder_traversal\(\s*self,\s*node,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
index 06f93816dc1..328d51d7a26 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
@@ -20,7 +20,7 @@ assert.match(code, /if\s+node:/);
 You should call `_inorder_traversal` on the `node.left` inside the `if` block.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.left\s*,\s*result\s*\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.left\s*,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
index a6cbb068353..ba16de7a103 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
@@ -14,7 +14,7 @@ Still inside the `if` block, append the `key` of the current node to the `result
 You should append `node.key` to the `result` list.
 
 ```js
-assert.match(code, /result\.append\(node\.key\)/);
+assert.match(code, /result\.append\(\s*node\.key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
index 4da0f5f177f..37e482201d3 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
@@ -16,13 +16,13 @@ Create an instance of the `BinarySearchTree` class and assign it to the variable
 You should create an instance of the `BinarySearchTree` class.
 
 ```js
-assert.match(code, /BinarySearchTree\(\)/);
+assert.match(code, /BinarySearchTree\(\s*\)/);
 ```
 
 You should assign the new instance of `BinarySearchTree` to the variable `bst`.
 
 ```js
-assert.match(code, /bst\s*=\s*BinarySearchTree\(\)/);
+assert.match(code, /bst\s*=\s*BinarySearchTree\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
index ee554542597..c3b2fadd8e7 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
@@ -20,7 +20,7 @@ assert.match(code, /nodes/);
 Your `node` variable should have the value `[50, 30, 20, 40, 70, 60, 80]`.
 
 ```js
-assert.match(code, /nodes\s*=\s*\[50,\s*30,\s*20,\s*40,\s*70,\s*60,\s*80\]/);
+assert.match(code, /nodes\s*=\s*\[\s*50\s*,\s*30\s*,\s*20\s*,\s*40\s*\s*,\s*70\s*,\s*60\s*,\s*80\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
index 0af7ada6e11..7d7d4abcfa4 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
@@ -16,7 +16,7 @@ This recursive call explores the entire right subtree in an in-order manner.
 You should call `_inorder_traversal` passing `node.right` and `result` as the arguments.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.right,\s*result\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.right,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
index 4966107dde4..ace653de029 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
@@ -16,7 +16,7 @@ To change that to print a useful value, define another method named `__str__` in
 You should define a method `__str__` that takes a single argument `self`. Denke daran, `pass` zu verwenden.
 
 ```js
-assert.match(code, /def\s+__str__\(self\)/);
+assert.match(code, /def\s+__str__\(\s*self\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
index b2e3c8a8a70..8cad36e5174 100644
--- a/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
+++ b/curriculum/challenges/german/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
@@ -14,7 +14,7 @@ In the body of the `__str__` method, delete `pass` and return the result of call
 You should return the string value of `self.key` from your `__str__` method.
 
 ```js
-({ test: () => assert.match(code, /^\s{8}return\s+str\(self\.key\)/m) })
+({ test: () => assert.match(code, /^\s{8}return\s+str\(\s*self\.key\s*\)/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md b/curriculum/challenges/german/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
index f1f67f92ce8..1675e907d38 100644
--- a/curriculum/challenges/german/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
+++ b/curriculum/challenges/german/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
@@ -13,16 +13,12 @@ Well done! You have completed the final part of the _Registration Form_ practice
 
 # --hints--
 
-You should use an `a` element selector.
-
-```js
-assert.exists(new __helpers.CSSHelp(document).getStyle('a'));
-```
 
 You should give the `a` element a `color` of `#dfdfe2`.
 
 ```js
-assert.equal(new __helpers.CSSHelp(document).getStyle('a')?.color, 'rgb(223, 223, 226)');
+const linkElement = document.querySelector("a");
+assert.equal(window.getComputedStyle(linkElement)?.color, 'rgb(223, 223, 226)');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
index c8b0bc1964b..b279a1bbf08 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
@@ -10,11 +10,9 @@ dashedName: build-a-cash-register
 
 Here you'll build a cash register app that will return change to the customer based on the price of the item, the amount of cash provided by the customer, and the amount of cash in the cash drawer. You'll also need to show different messages to the user in different scenarios, such as when the customer provides too little cash or when the cash drawer doesn't have enough to issue the correct change.
 
-There are a few variables you'll need to use in your code:
+In the `script.js` file, you have been provided with the `price` and `cid` variables. The `price` variable is the price of the item, and the `cid` variable is the cash-in-drawer, which is a 2D array listing the available currency in the cash drawer.
 
-- `price`: the price of the item as a floating point number.
-- `cash`: the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
-- `cid`: cash-in-drawer, a 2D array listing available currency in the cash drawer.
+The other variable you will need add is the `cash` variable, which is the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
 
 If you'd like to test your application with different values for `price` and `cid`, make sure to declare them with the `let` keyword so they can be reassigned by our tests.
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
index 40e116834ba..b2e8d08946d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
@@ -28,10 +28,10 @@ In this project, you'll build an app that will search for Pokémon by name or ID
 1. You should have an element with an `id` of `special-defense`
 1. You should have an element with an `id` of `speed`
 1. When the `#search-input` element contains the value `Red` and the `#search-button` element is clicked, an alert should appear with the text `Pokémon not found`
-1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
+1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the `#types` element should contain a single inner element with the value `ELECTRIC`. The `#types` element content should be cleared between searches
-1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
+1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed`elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the `#types` element should contain two inner elements with the text values `GHOST` and `POISON`, respectively. The `#types` element content should be cleared between searches
 
@@ -158,7 +158,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
+When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
 
 ```js
 async () => {
@@ -251,7 +251,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
+When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
 
 ```js
 async () => {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
index 495e66f36d0..01f289781ff 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
@@ -11,7 +11,7 @@ Nun, da du den Wert der Eingabe hast, musst du ihn in ein Array von Zahlen aufte
 
 Die `.split()`-Methode nimmt einen String und zerlegt ihn in einen Array von Strings. You can pass it a string of characters or a RegEx to use as a separator. Zum Beispiel würde `string.split(",")` den String an jedem Komma trennen und ein Array von Strings zurückgeben.
 
-Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces seperating your values. Speichere das Array in einer `array`-Vabriablen.
+Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces separating your values. Speichere das Array in einer `array`-Vabriablen.
 
 # --hints--
 
@@ -36,7 +36,7 @@ assert.match(code.toString(),  /array\s*=\s*value\.split()/);
 You should use `/,\s*/g` for the `split()` method's separator.
 
 ```js
-assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\)/);
+assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
index 66263a6c1ca..ad83f42a42e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
@@ -22,7 +22,7 @@ assert.match(calculate.toString(), /numbers/);
 You should use the `.map()` method on your `array` variable.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\)/);
+assert.match(calculate.toString(), /array\.map\(\s*\)/);
 ```
 
 Du solltest deiner `numbers`-Variable das Ergebnis deines `.map()`-Aufrufs zuweisen.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
index cd202008be0..0fd57d3cc05 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
@@ -24,7 +24,7 @@ Füge deiner `.map()`-Methode eine Callback-Funktion hinzu, die jedes Element in
 Your `.map()` method should have a callback function which takes an `el` parameter.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Deine Callback-Funktion sollte den `Number`-Konstruktor verwenden, um `el` in eine Zahl umzuwandeln.
@@ -42,7 +42,7 @@ assert.notMatch(calculate.toString(), /new/);
 Deine Callback-Funktion sollte das in eine Zahl umgewandelte Element zurückgeben.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
index 6b6e0e7f277..40d1fa84336 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
@@ -24,13 +24,13 @@ assert.match(calculate.toString(), /filtered/);
 Deine `calculate`-Funktion sollte die `.filter()`-Methode für dein `numbers`-Array verwenden.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\)/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*\)/)
 ```
 
 Du solltest der `filtered`-Variable das Ergebnis von `numbers.filter()` zuweisen.
 
 ```js
-assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\)/);
+assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
index c7142af2303..88f27c367aa 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
@@ -26,7 +26,7 @@ Add a callback function to your `.filter()` method that returns `true` if the el
 Your `.filter()` method should have a callback which accepts `el` as a parameter.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use `!` and `isNaN()` to check if `el` is NOT `NaN`.
@@ -38,7 +38,7 @@ assert.match(calculate.toString(), /!\s*(Number\.)?isNaN\(\s*el\s*\)/);
 Deine Callback-Funktion sollte Elemente zurückgeben, die nicht `NaN` entsprechen.
 
 ```js
-assert.match(calculate.toString(), /(numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
index 3f896bd52dc..a90a007cec4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
@@ -28,20 +28,19 @@ assert.notMatch(calculate.toString(), /filtered/);
 You should chain your `.filter()` call to your `.map()` call.
 
 ```js
-console.log(calculate.toString());
 assert.match(calculate.toString(), /array\.map\(.*\)\.filter\(/s);
 ```
 
 Du solltest das `.map()`-Callback nicht entfernen.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 Du solltest das `.filter()`-Callback nicht entfernen.
 
 ```js
-assert.match(calculate.toString(), /(\.filter\(\(?\s*el\s*\)?\s*=>|\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
+assert.match(calculate.toString(), /(\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
index 65760495900..b0ee49082fa 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
@@ -22,13 +22,13 @@ assert.match(getMean.toString(), /sum/);
 Your `getMean` function should use the `.reduce()` method of the `array` parameter.
 
 ```js
-assert.match(getMean.toString(), /array\.reduce\(\)/);
+assert.match(getMean.toString(), /array\.reduce\(\s*\)/);
 ```
 
 Du solltest der `sum`-Variable das Ergebnis von `array.reduce()` zuweisen.
 
 ```js
-assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\)/);
+assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
index 18da92de099..eefe9f062d7 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
@@ -22,13 +22,13 @@ array.reduce((acc, el) => {
 Your `reduce` method should have a callback function which takes an `acc` and an `el` parameters.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)/)
 ```
 
 Your `reduce` method should return the sum of `acc` and `el`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
index 1e6a06db5ee..aa7406186c9 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
@@ -22,7 +22,7 @@ Setze den Anfangswert des Akkumators auf `0`.
 Deine `reduce`-Methode sollte `0` als Anfangswert haben.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
index 38eb0555dc3..04295701bfb 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
@@ -28,19 +28,19 @@ assert.notMatch(getMean.toString(), /mean\s*=/);
 Du solltest die Logik innerhalb der `reduce`-Methode nicht ändern.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 You should divide the result of the `reduce` method by the length of the array.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)\s*\/\s*array\.length/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 Du solltest die implizite Rückgabesyntax verwenden, um direkt das Ergebnis von `reduce` geteilt durch die Länge des Arrays zurückzugeben.
 
 ```js
-assert.match(code, /const\s+getMean\s*=\s*\(?array\)?\s*=>\s*array\.reduce\(\(acc\s*,\s*el\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
+assert.match(code, /const\s+getMean\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
index 53801a227dc..a167431f621 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
@@ -18,13 +18,13 @@ Um deine Zahlen von der kleinsten bis zur größten Zahl zu sortieren, übergib
 Your `sort` method should have a callback function which takes an `a` and a `b` parameters.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)/)
 ```
 
 Deine `sort`-Methode sollte das Ergebnis der Subtraktion von `b` und `a` zurückgeben.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
index d8928f57315..9e55fa0070c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
@@ -34,13 +34,13 @@ assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0
 If `array.length` is even, pass an array with the two middle numbers from the `sorted` array to the `getMean` function. The first item in the array argument should be the value at index `array.length / 2` from `sorted` and the second should use the value at the index `array.length / 2 - 1` from `sorted`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:/);
 ```
 
 Wenn die `array.length` eine ungerade Zahl ist, sollte deine `median`-Variable der `median`-Variablen die mittlere Zahl zuweisen. The middle number is the value of `sorted` at `Math.floor(array.length / 2)`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:\s*sorted\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\)\];/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:\s*sorted\s*\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\s*\)\s*\]\s*;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
index ab5e3e77fc1..36e7d929f9d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
@@ -22,13 +22,13 @@ assert.match(calculate.toString(), /median\s*=/);
 Your `median` variable should be assigned the value of `getMedian(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /median\s*=\s*getMedian\(numbers\)/);
+assert.match(calculate.toString(), /median\s*=\s*getMedian\(\s*numbers\s*\)/);
 ```
 
 Your `calculate` function should query the DOM for the `#median` element and set the `textContent` to `median`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#median\1\)\.textContent\s*=\s*median/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#median\1\s*\)\.textContent\s*=\s*median/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
index 15dd3fc4763..a05acb98d08 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
@@ -22,14 +22,13 @@ assert.match(getMode.toString(), /array\.forEach\(/);
 Your `.forEach()` method should have a callback function which takes an `el` parameter.
 
 ```js
-console.log(getMode.toString());
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)/);
 ```
 
 Your `.forEach()` method should increment the count for each number. Don't forget the fallback value.
 
 ```js
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)\s*\{?\s*(return)?\s*counts\[\s*el\s*\]\s*=\s*\(\s*counts\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)\s*\{?\s*(return)?\s*counts\s*\[\s*el\s*\]\s*=\s*\(\s*counts\s*\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
index fe5bc686589..15d6990067f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
@@ -24,19 +24,19 @@ assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.so
 Your `getMode` function should pass a callback to the `sort` method with parameters `a` and `b`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)/)
 ```
 
 Your `getMode` function should use the `sort` method to sort the `Object.keys()` array and return the value of `counts[b]` minus the value of `counts[a]`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)/)
 ```
 
 Your `highest` variable should have the value of the first entry in the sorted `Object.keys(counts)` array.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)\[0\];/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)\s*\[\s*0\s*\]\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
index 428ebfe044a..748d29c20cd 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
@@ -20,13 +20,13 @@ assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filte
 Your `.filter()` method should take a callback function with a parameter `el`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)/);
 ```
 
 Deine `.filter()`-Methode sollte zurückgeben, ob der Wert von `counts[el]` `counts[highest]` ergibt.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\[\s*el\s*\]\s*===\s*counts\[\s*highest\s*\];\s*\}/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\s*\[\s*el\s*\]\s*===\s*counts\s*\[\s*highest\s*\]\s*;\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
index 6d2eca14a37..f8ac8550990 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /mode\s*=\s*getMode\(\s*numbers\s*\);/);
 Your `calculate` function should query the DOM for the `#mode` element and set the `textContent` to `mode`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#mode\1\)\.textContent\s*=\s*mode;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#mode\1\s*\)\.textContent\s*=\s*mode;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
index de6ead0cb67..7067afba2b6 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
@@ -12,7 +12,10 @@ Your next calculation is the <dfn>range</dfn>, which is the difference between t
 You previously learned about the global `Math` object. `Math` has a `.min()` method to get the smallest number from a series of numbers, and the `.max()` method to get the largest number. Hier ist ein Beispiel, bei dem die kleinste Zahl aus einem Array ermittelt wird:
 
 ```js
-Math.min(1, 9, 11, -3, 0.5);
+const numbersArr = [2, 3, 1];
+
+console.log(Math.min(...numbersArr));
+// Expected output: 1
 ```
 
 Declare a `getRange` function that takes the same `array` parameter you have been using. Using `Math.min()`, `Math.max()`, and the spread operator, return the difference between the largest and smallest numbers in the list.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
index e3d7086fcbe..b5b5bf67480 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
@@ -14,13 +14,13 @@ Add the logic for calculating and displaying the range to your `calculate` funct
 Deine `calculate`-Funktion sollte eine `range`-Variable auf das Resultat von `getRange(numbers)` setzen.
 
 ```js
-assert.match(calculate.toString(), /range\s*=\s*getRange\(numbers\);/);
+assert.match(calculate.toString(), /range\s*=\s*getRange\(\s*numbers\s*\);/);
 ```
 
 Deine `calculate`-Funktion sollte den `textContent` des `#range`-Elements auf den Wert der `range`-Variable setzen.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#range\1\)\.textContent\s*=\s*range;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#range\1\s*\)\.textContent\s*=\s*range;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
index 44593a0f687..cf0abb8811e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
@@ -26,13 +26,13 @@ assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(/);
 Deine `differences`-Variable sollte den `el`-Parameter in der Callback-Funktion verwenden.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Dein `map`-Callback sollte den Wert von `el` minus `mean` zurückgeben.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
index bba0cffb932..e72889d1cd2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
@@ -28,13 +28,13 @@ assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\
 Deine `squaredDifferences`-Variable sollte den `el`-Parameter in der Callback-Funktion verwenden.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Dein `map`-Callback sollte den Wert von `el` zum Quadrat zurückgeben.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
 ```
 
 Dein `map`-Callback sollte den `**`-Operator verwenden.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
index 2c6bc6a3cae..244f250f519 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
@@ -28,14 +28,13 @@ assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDiffere
 Deine `sumSquaredDifferences`-Variable sollte die `acc`- und `el`-Parameter in der Callback-Funktion verwenden.
 
 ```js
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Dein `reduce`-Callback sollte die Summe von `acc` und `el` zurückgeben.
 
 ```js
-console.log(getVariance.toString());
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
index 9be30327919..b9902674c73 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
@@ -46,19 +46,19 @@ assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(/);
 Deine `variance`-Variable sollte die `acc`- und `el`-Parameter in der Callback-Funktion verwenden.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Deine `reduce`-Callback sollte eine leere Funktion sein.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}/);
 ```
 
 Dein `reduce`-Callback sollte einen Ausgangswert von `0` haben.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}\s*,\s*0\s*\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
index a8d436e0c5b..c89421c6523 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
@@ -14,37 +14,37 @@ Deklariere eine Variable `difference` innerhalb deines leeren `.reduce()`-Callba
 Dein `reduce`-Callback sollte über eine `difference`-Variable verfügen.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=/);
 ```
 
 Deine `difference`-Variable sollte auf den Wert von `el` minus `mean` gesetzt werden.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
 ```
 
 Dein `reduce`-Callback sollte über eine `squared`-Variable verfügen.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
 ```
 
 Deine `squared`-Variable sollte auf den Wert von `difference` hoch 2 gesetzt werden.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
 ```
 
 Dein `reduce`-Callback sollte den Wert von `acc` plus `squared` zurückgeben.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
 ```
 
 Du solltest den Ausgangswert von `0` nicht aus deiner `.reduce()`-Methode entfernen.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
index 02bb3b66218..990179e50b9 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
@@ -16,7 +16,7 @@ Teile deinen `.reduce()`-Aufruf durch die Länge des Arrays (in deiner `variance
 Du solltest das Ergebnis des `.reduce()`-Aufrufs durch die Länge des Arrays teilen.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)\s*\/\s*array\.length;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)\s*\/\s*array\.length;/);
 ```
 
 Du solltest den Wert von `variance` zurückgeben.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
index bd07dd7036f..b9a90d47ce2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /variance\s*=\s*getVariance\(\s*numbers\s*\)/
 You should set the `textContent` of the `#variance` element to the value of the `variance` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#variance\1\)\.textContent\s*=\s*variance/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#variance\1\s*\)\.textContent\s*=\s*variance/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
index 09f9d6f29c9..d9cb3f030f5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
@@ -14,13 +14,13 @@ Now update the `calculate` function to include the standard deviation logic, lik
 Your `calculate` function should have a `standardDeviation` variable set to the result of `getStandardDeviation(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(numbers\)/);
+assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(\s*numbers\s*\)/);
 ```
 
 You should update the `textContent` of the `#standardDeviation` element to be the `standardDeviation` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#standardDeviation\1\)\.textContent\s*=\s*standardDeviation/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#standardDeviation\1\s*\)\.textContent\s*=\s*standardDeviation/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
index f9f09aa2895..173db244fb4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
@@ -16,19 +16,19 @@ To fix this, add an empty `.slice()` call before your `.sort()` method. The empt
 You should call `.slice()` on the `array` parameter.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)/);
 ```
 
 Your `.sort()` call should be chained to the `.slice()` call.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(/);
 ```
 
 Du solltest den Callback der `.sort()`-Methode nicht verändern.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
index efa831249e5..b359d022173 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
@@ -24,7 +24,7 @@ Use the `async` keyword to create an asynchronous arrow function called `fetchDa
 You should use the `async` keyword to create an asynchronous arrow function called `fetchData`.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*[^}]*\s*}/);
 ```
 
 `fetchData` should be defined.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
index a03df9bc197..6b600a7dcfd 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
@@ -37,7 +37,7 @@ assert.match(code, /\s*const\s+res\s*=\s*await\s+fetch\(\s*(.*)\s*\)/);
 You should pass in the `forumLatest` constant to the `fetch` call.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
index ca215d554df..45c4470f874 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+data/);
 You should assign `await res.json()` to the `data` variable.
 
 ```js
-assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\);?\s*/);
+assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
index 453398d7ffd..f34aa444a5e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
@@ -28,7 +28,7 @@ assert.match(code, /\s*try\s*{[\s\S]*\s*console\.log\(\s*data\s*\)[\s\S]*}\s*cat
 You should call the `fetchData()` function, after the `fetchData()` function is defined.
 
 ```js
-assert.match(code, /};?\s*fetchData\(\)/);
+assert.match(code, /};?\s*fetchData\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
index de6257357c6..45e8f282220 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
@@ -22,7 +22,7 @@ assert.match(code, /\s*showLatestPosts\(.*\);??\s*/);
 You should pass `data` as the argument to `showLatestsPosts()`.
 
 ```js
-assert.match(code, /\s*showLatestPosts\(data\);?\s*/);
+assert.match(code, /\s*showLatestPosts\(\s*data\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
index 852e445a250..82f9d44785a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
@@ -20,7 +20,7 @@ assert.match(code, /\s*const\s+thousands\s*=/);
 Your should assign `Math.floor(views / 1000)` to your `thousands` variable.
 
 ```js
-assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(views\s*\/\s*1000\)\s*/);
+assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(\s*views\s*\/\s*1000\s*\)\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
index 88e0c5e2cdc..cfedbcb782f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
@@ -14,7 +14,7 @@ Inside the `if` statement, destructure `className` and `category` from the `allC
 You should destructure `className` and `category` from the `allCategories[id]` object. The properties can be in any order.
 
 ```js
-assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\[id\]\s*/g));
+assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\s*\[\s*id\s*\]\s*/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
index 9d8a648d80a..ce92c7901c5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
@@ -27,19 +27,19 @@ Inside your `fetchData` function, add a `try...catch` statement. The `catch` blo
 You should have a `try` block inside your `fetchData` function.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
 ```
 
 You should have a `catch` block after your `try` block.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
 ```
 
 Your `catch` block should have an `err` parameter.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
 ```
 
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
index a4882ffd0a1..adbcb0472b5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+postsContainer\s*=/);
 You should use `document.getElementById()` to get the `#posts-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)posts-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/);
 ```
 
 You should assign the `#posts-container` element to your `postsContainer` variable.
 
 ```js
-assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(('|"|`)posts-container\1\)/g));
+assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
index 356ba4259c7..27a94e10528 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
@@ -14,7 +14,7 @@ Du wirst dies als Eventlistener für den `sortButton` verwenden. Da Buttons, die
 Deine `sortInputArray`-Funktion sollte `event.preventDefault()` aufrufen.
 
 ```js
-assert.match(sortInputArray.toString(), /event\.preventDefault\(\)/);
+assert.match(sortInputArray.toString(), /event\.preventDefault\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
index d94fdb27d7c..6ba760aedec 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*
 Du solltest `temp` den Wert `array[j]` zuweisen.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?/);
 ```
 
 Du solltest `array[j]` den Wert `array[j + 1]` zuweisen.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?/);
 ```
 
 Du solltest `array[j + 1]` den Wert `temp` zuweisen.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
index fd2e0d4dcc3..7ffe5f39276 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
@@ -14,7 +14,7 @@ Nachdem soll deine äußere Schleife ausgeführt wurde, solltest du das sortiert
 Du solltest die `array`-Variable `return`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
index dd01ff8d587..f34c0996a3d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
@@ -17,7 +17,7 @@ Du solltest deinen `console.log()`-Aufruf entfernen.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(bubbleSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(bubbleSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
index d95a49bc5db..2afd3395a0c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{
 Du solltest dem `temp` `array[i]` zuweisen.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]/)
 ```
 
 Du solltest dem `array[i]` `array[minIndex]` zuweisen.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]/)
 ```
 
 Du solltest dem `array[minIndex]` `temp` zuweisen.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
index c449b643d93..e85315302d1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished, you need to return the array. Once
 You should `return` the `array` after your outer loop completes.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
index 2817ba1151d..25f08dfe011 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
@@ -15,7 +15,7 @@ Du solltest die `console.log()`-Anweisung aus `selectionSort()` entfernen.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(selectionSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(selectionSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
index 0bea7479e86..10ddbe8fe16 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
@@ -16,7 +16,7 @@ Do so by assigning the value at the `j` index to the next index.
 Before decrementing `j`, assign the value at `j` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
index a188b3f7e7c..b91d4e1cec2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
@@ -16,7 +16,7 @@ Use the assignment operator to insert your current value into the correct index.
 You should assign `currValue` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
+assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
index 8a58ac512df..57366eb5440 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
@@ -14,7 +14,7 @@ Nachdem deine `for`-Schleife beendet ist, musst du das Array zurückgeben. Wenn
 You should `return` the `array`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
index f8709567350..aa1a29f8764 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
@@ -11,7 +11,7 @@ Eines der leistungsfähigsten Werkzeuge ist deine Entwicklerkonsole. Abhängig v
 
 Die Entwicklerkonsole enthält Fehler, die durch deinen Code verursacht werden, aber du kannst sie auch verwenden, um die Werte von Variablen in deinem Code zu sehen, was bei der Fehlersuche hilfreich ist.
 
-Füge eine `console.log("Hello World");`-Zeile zwischen deinen `script`-Tags hinzu. Klicke dann auf die "Konsole"-Schaltfläche, um die Konsole zu öffnen. Du solltest den Text `Hello World` sehen.
+Füge eine `console.log("Hello World");`-Zeile zwischen deinen `script`-Tags hinzu. Klicke dann auf die "Konsole"-Schaltfläche, um die Konsole zu öffnen. You should see the text `"Hello World"`.
 
 Beachte, dass die Zeile mit einem Semikolon endet. In JavaScript ist es üblich, Codezeilen mit Semikolons zu beenden.
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
index bf22ba839c1..0068611c60f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
@@ -10,10 +10,10 @@ dashedName: step-7
 Variablen kann ein Wert <dfn>zugewiesen</dfn> werden. Wenn du dies bei der Deklaration tust, nennt man das <dfn>Initialisierung</dfn>. Zum Beispiel:
 
 ```js
-let camperbot = "Bot";
+let age = 32;
 ```
 
-Dies würde die `camperbot`-Variable mit dem Wert `Bot`, einem String, initialisieren.
+This would initialize the `age` variable with a value of `32`, a number.
 
 Initialisiere deine `xp`-Variable mit dem Wert `0`, einer Zahl.
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
index f01743a75d5..6a3dec320e3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
@@ -15,7 +15,7 @@ let order = ["first", "second", "third"];
 
 Dies ist ein Array, das drei Werte enthält. Beachte, wie die Werte durch Kommas getrennt werden.
 
-Wandle deine `inventory`-Variable zu einem Array mit den Strings `stick`, `dagger` und `sword` um.
+Change your `inventory` variable to be an array with the strings `"stick"`, `"dagger"`, and `"sword"`.
 
 # --hints--
 
@@ -31,19 +31,19 @@ Deine `inventory`-Variable sollte drei Werte haben.
 assert.lengthOf(inventory, 3);
 ```
 
-Deine `inventory`-Variable sollte den String `stick` enthalten.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
 ```
 
-Deine `inventory`-Variable sollte den String `dagger` enthalten.
+Your `inventory` variable should include the string `"dagger"`.
 
 ```js
 assert.include(inventory, "dagger");
 ```
 
-Deine `inventory`-Variable sollte den String `sword` enthalten.
+Your `inventory` variable should include the string `"sword"`.
 
 ```js
 assert.include(inventory, "sword");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
index d79e1481a10..53cd5f4b941 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-Im Moment soll der Spieler nur mit dem `stick` beginnen. Change the `inventory` array to have `stick` as its only value.
+For now, you want the player to start with just the `"stick"`. Change the `inventory` array to have `"stick"` as its only value.
 
 # --hints--
 
@@ -23,7 +23,7 @@ Your `inventory` variable should only have one value.
 assert.lengthOf(inventory, 1);
 ```
 
-Your `inventory` variable should include the string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
index 08ca9e3d549..dce93e39fd5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
@@ -33,10 +33,10 @@ Du solltest `document.querySelector()` verwenden.
 assert.match(code, /document\.querySelector/);
 ```
 
-Du solltest den `#button1`-Selektor verwenden.
+You should use the `"#button1"` selector.
 
 ```js
-assert.match(code, /querySelector\(('|")#button1\1\)/);
+assert.match(code, /querySelector\(\s*('|")#button1\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
index 21772b5d077..48ac9c583f5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
@@ -9,12 +9,14 @@ dashedName: step-40
 
 `button1` steht für dein erstes `button`-Element. Diese Elemente haben eine spezielle Eigenschaft namens `onclick`, mit der du bestimmen kannst, was passiert, wenn jemand auf die Schaltfläche klickt.
 
-Du kannst auf Eigenschaften in JavaScript auf verschiedene Weise zugreifen. Die erste Möglichkeit bezieht sich auf die <dfn>Punktnotation</dfn>. Der Zugriff auf die `onclick`-Eigenschaft eines Buttons würde folgendermaßen aussehen:
+Du kannst auf Eigenschaften in JavaScript auf verschiedene Weise zugreifen. Die erste Möglichkeit bezieht sich auf die <dfn>Punktnotation</dfn>. Here is an example of using dot notation to set the `onclick` property of a button to a function reference.
 
 ```js
-button.onclick
+button.onclick = myFunction;
 ```
 
+In this example, `button` is the button element, and `myFunction` is a reference to a function. When the button is clicked, `myFunction` will be called.
+
 Use dot notation to set the `onclick` property of your `button1` to the function reference of `goStore`. Note that `button1` is already declared, so you don't need to use `let` or `const`.
 
 # --hints--
@@ -31,10 +33,10 @@ Du solltest nicht `let` oder `const` verwenden.
 assert.notMatch(code, /(let|const)\s+button1\.onclick/);
 ```
 
-You should assign the `goStore` function reference to `button1.onclick`.
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button1\.onclick\s*=\s*goStore/);
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
index 658d4ee581b..65de963be13 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
@@ -13,6 +13,12 @@ Setze mit der gleichen Syntax die `onclick`-Eigenschaften von `button2` und `but
 
 # --hints--
 
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
+
+```js
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
+```
+
 Du solltest die Punktnotation verwenden, um auf die `onclick`-Eigenschaft von `button2` zuzugreifen.
 
 ```js
@@ -25,10 +31,10 @@ Du solltest nicht `let` oder `const` verwenden, um `button2.onclick` zuzuweisen.
 assert.notMatch(code, /(let|const)\s+button2\.onclick/);
 ```
 
-Du solltest die `onclick`-Eigenschaften von `button2` auf die Variable `goCave` setzen.
+You should assign the `goCave` function reference to `button2.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button2\.onclick\s*=\s*goCave/);
+assert.match(code, /button2\.onclick\s*=\s*goCave\s*;?\s*$/m);
 ```
 
 Du solltest die Punktnotation verwenden, um auf die `onclick`-Eigenschaft von `button3` zuzugreifen.
@@ -43,10 +49,10 @@ Du solltest nicht `let` oder `const` verwenden, um `button3.onclick` zuzuweisen.
 assert.notMatch(code, /(let|const)\s+button3\.onclick/);
 ```
 
-Du solltest die `onclick`-Eigenschaften von `button3` auf die Variable `fightDragon` setzen.
+You should assign the `fightDragon` function reference to `button3.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button3\.onclick\s*=\s*fightDragon/);
+assert.match(code, /button3\.onclick\s*=\s*fightDragon\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
index 15de3237ddd..f74a8bc2cf5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-Lasse deine `goStore`-Funktion zunächst die Meldung `Going to store.` auf der Konsole ausgeben. Hier ist zum Beispiel eine Funktion, die die Nachricht `Hello World` ausgibt.
+For now, make your `goStore` function output the message `"Going to store."` to the console. For example, here is a function that outputs the message `"Hello World"`.
 
 ```js
 function functionName() {
@@ -20,13 +20,13 @@ function functionName() {
 Du solltest eine `console.log("Going to store.");` Zeile in deinem Code haben. Vergiss nicht das Semikolon.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to store\.\1\);/);
+assert.match(code, /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 Your `console.log("Going to store.");` line should be in your `goStore` function.
 
 ```js
-assert.match(goStore.toString(), /console\.log\(('|")Going to store\.\1\);/);
+assert.match(goStore.toString(), /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
index 711a203a266..c8ca26ad1df 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
@@ -7,7 +7,7 @@ dashedName: step-37
 
 # --description--
 
-Erstelle nun eine `goCave`-Funktion, die `Going to cave.` auf der Konsole ausgibt.
+Now create a `goCave` function that prints `"Going to cave."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(goCave);
 Du solltest eine `console.log("Going to cave.");`-Zeile in deinem Code haben.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 Deine `console.log("Going to cave.");`-Zeile sollte sich in deiner `goCave`-Funktion befinden.
 
 ```js
-assert.match(goCave.toString(), /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(goCave.toString(), /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
index 437b44d7b58..39a25ba6dd3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
@@ -7,7 +7,7 @@ dashedName: step-38
 
 # --description--
 
-Erstelle nun eine `fightDragon`-Funktion, die `Fighting dragon.` auf die Konsole druckt.
+Now create a `fightDragon` function that prints `"Fighting dragon."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(fightDragon);
 Du solltest eine `console.log("Fighting dragon.");` Zeile in deinem Code haben.
 
 ```js
-assert.match(code, /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 Deine `console.log("Fighting dragon.");`-Zeile sollte sich in deiner `fightDragon`-Funktion befinden.
 
 ```js
-assert.match(fightDragon.toString(), /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(fightDragon.toString(), /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
index cded550577e..94ef4cb68d0 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
@@ -9,21 +9,25 @@ dashedName: step-42
 
 Die `innerText`-Eigenschaft steuert den Text, der in einem HTML-Element angezeigt wird. Zum Beispiel:
 
-```js
-const info = document.querySelector("#info");
-info.innerText = "Hello World";
+```html
+<p id="info">Demo content</p> 
 ```
 
-Dieser Code würde das der `info`-Variable zugewiesene Element so ändern, dass es den Text `Hello World` hat.
+```js
+const info = document.querySelector("#info"); 
+info.innerText = "Hello World"; 
+```
 
-Wenn ein Spieler auf die Schaltfläche `Go to store` klickt, möchtest du die Schaltflächen und den Text ändern. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `Buy 10 health (10 gold)`.
+The following example would change the text of the `p` element from `Demo content` to `Hello World`.
+
+Wenn ein Spieler auf die Schaltfläche `Go to store` klickt, möchtest du die Schaltflächen und den Text ändern. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `"Buy 10 health (10 gold)"`.
 
 # --hints--
 
 Du solltest keine `console.log("Going to store.");`-Zeile in deinem Code haben.
 
 ```js
-assert.notMatch(code, /console\.log\(('|")Going to store\.\1\)/);
+assert.notMatch(code, /console\.log\(\s*('|")Going to store\.\1\s*\)/);
 ```
 
 Du solltest die Punktnotation verwenden, um auf die `innerText`-Eigenschaft von `button1` zuzugreifen.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
index 3837d90cdc6..259be50ac07 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Füge nun eine Zeile hinzu, die den Text von `button2` dahin gehend aktualisiert, dass er `Buy weapon (30 gold)` lautet und aktualisiere den Text von `button3` so, dass er `Go to town square` lautet.
+Now, add a line that updates the text of `button2` to say `"Buy weapon (30 gold)"` and update the text of `button3` to say `"Go to town square"`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button2\.innerText/);
 ```
 
-Du solltest die `innerText`-Eigenschaft von `button2` so aktualisieren, dass sie `Buy weapon (30 gold)` ergibt.
+You should update the `innerText` property of `button2` to be `"Buy weapon (30 gold)"`.
 
 ```js
 assert.match(code, /button2\.innerText\s*=\s*('|")Buy weapon \(30 gold\)\1/);
@@ -47,7 +47,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button3\.innerText/);
 ```
 
-Du solltest die `innerText`-Eigenschaft von `button3` so aktualisieren, dass sie `Go to town square` ergibt.
+You should update the `innerText` property of `button3` to be `"Go to town square"`.
 
 ```js
 assert.match(code, /button3\.innerText\s*=\s*('|")Go to town square\1/);
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
index 8c0ef9437a2..6b5ce9b526e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Nun musst du deinen Anzeigetext ändern. Ändere die `innerText`-Eigenschaft von `text`, so dass er `You enter the store.` ergibt.
+Nun musst du deinen Anzeigetext ändern. Change the `innerText` property of the `text` to be `"You enter the store."`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `text`
 assert.notMatch(code, /(let|const)\s+text\.innerText/);
 ```
 
-You should update the `innerText` property of `text` to be `You enter the store.`.
+You should update the `innerText` property of `text` to be `"You enter the store."`.
 
 ```js
 assert.match(code, /text\.innerText\s*=\s*('|")You enter the store.\1/);
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
index 61face5d6ed..cf62f1f1195 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
@@ -7,25 +7,25 @@ dashedName: step-48
 
 # --description--
 
-Verändere in deiner `goTown`-Funktion die `innerText`-Eigenschaften deiner `button`-Elemente, so dass sie `Go to store`, `Go to cave` und `Fight dragon` ergeben. Aktualisiere deine `onclick` Eigenschaften, so dass sie `goStore`, `goCave` bzw. `fightDragon` sind.
+In your `goTown` function, change your `button` elements' `innerText` properties to be `"Go to store"`, `"Go to cave"`, and `"Fight dragon"`. Aktualisiere deine `onclick` Eigenschaften, so dass sie `goStore`, `goCave` bzw. `fightDragon` sind.
 
-Finally, update `innerText` property of your `text` to be `You are in the town square. You see a sign that says Store.`.
+Finally, update `innerText` property of your `text` to be `"You are in the town square. You see a sign that says Store."`.
 
 # --hints--
 
-Du solltest die `button1.innerText`-Eigenschaft in deiner `goTown`-Funktion auf `Go to store` setzen.
+You should set the `button1.innerText` property to be `"Go to store"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-Du solltest die `button2.innerText`-Eigenschaft in deiner `goTown`-Funktion auf `Go to cave` setzen.
+You should set the `button2.innerText` property to be `"Go to cave"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-Du solltest die `button3.innerText`-Eigenschaft in deiner `goTown`-Funktion auf `Fight dragon` setzen.
+You should set the `button3.innerText` property to be `"Fight dragon"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -49,7 +49,7 @@ Du solltest die `button3.onclick`-Eigenschaft in deiner `goTown`-Funktion auf `f
 assert.match(goTown.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-Du solltest die `text.innerText`-Eigenschaft in deiner `goTown`-Funktion auf `You are in the town square. You see a sign that says Store.` setzen.
+You should set the `text.innerText` property to be `"You are in the town square. You see a sign that says Store."` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /text\.innerText\s*=\s*('|")You are in the town square. You see a sign that says Store\.\1/);
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
index 49984ca9607..2d4bffb4a09 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
@@ -28,7 +28,7 @@ assert.match(code, /function\s+update/);
 Deine `update`-Funktion sollte einen Parameter namens `location` haben.
 
 ```js
-assert.match(update.toString(), /update\(location\)/);
+assert.match(update.toString(), /update\(\s*location\s*\)/);
 ```
 
 Deine `update`-Funktion sollte leer sein.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
index 931374ba1a9..365ff5376d9 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. Hier ist zum Beispiel ein Objekt mit einem Schlüssel von `name`, der auf `Quincy Larson` gesetzt ist.
+Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. For example, here is an object with a key of `name` set to `"Quincy Larson"`.
 
 ```js
 {
@@ -15,7 +15,7 @@ Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is t
 }
 ```
 
-Füge eine `name`-Eigenschaft zu deinem leeren Objekt hinzu und gib ihm einen Wert von `town square`.
+Add a `name` property to your empty object and give it a value of `"town square"`.
 
 # --hints--
 
@@ -31,7 +31,7 @@ Dein erster Wert von `locations` sollte eine `name`-Eigenschaft haben.
 assert.isDefined(locations[0].name);
 ```
 
-Dein erster Wert von `locations` sollte eine `name`-Eigenschaft mit einem Wert von `town square` haben.
+Your first value of `locations` should have a `name` property with a value of `"town square"`.
 
 ```js
 assert.equal(locations[0].name, "town square");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
index 71144f3fdbc..99226760265 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
@@ -25,19 +25,19 @@ assert.isString(locations[0]["button text"][1]);
 assert.isString(locations[0]["button text"][2]);
 ```
 
-Der erste Wert im `button text`-Array sollte "Go to store" sein.
+The first value in the `button text` array should be `"Go to store"`.
 
 ```js
 assert.equal(locations[0]["button text"][0], "Go to store");
 ```
 
-Der zweite Wert im `button text`-Array sollte "Go to cave" sein.
+The second value in the `button text` array should be `"Go to cave"`.
 
 ```js
 assert.equal(locations[0]["button text"][1], "Go to cave");
 ```
 
-Der dritte Wert im `button text`-Array sollte "Fight dragon" sein.
+The third value in the `button text` array should be `"Fight dragon"`.
 
 ```js
 assert.equal(locations[0]["button text"][2], "Fight dragon");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
index f120103bb64..a6e93d61d92 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
@@ -23,7 +23,7 @@ Deine `text`-Eigenschaft sollte ein String sein.
 assert.isString(locations[0]["text"]);
 ```
 
-Deine `text`-Eigenschaft sollte den Wert `You are in the town square. You see a sign that says \"Store\".` haben
+Your `text` property should have the value `"You are in the town square. You see a sign that says \"Store\"."`
 
 ```js
 assert.equal(locations[0]["text"], "You are in the town square. You see a sign that says \"Store\".");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
index b1a5381701f..7bf3225eba4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
@@ -37,7 +37,7 @@ Dein zweites `locations`-Objekt sollte eine `button text`-Eigenschaft haben, die
 assert.isArray(locations[1]["button text"]);
 ```
 
-Your `button text` property should have the string values `Buy 10 health (10 gold)`, `Buy weapon (30 gold)`, and `Go to town square`.
+Your `button text` property should have the string values `"Buy 10 health (10 gold)"`, `"Buy weapon (30 gold)"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[1]["button text"][0], "Buy 10 health (10 gold)");
@@ -65,7 +65,7 @@ Your second `locations` object should have a `text` property which is a string.
 assert.isString(locations[1].text);
 ```
 
-Dein zweites `locations`-Objekt sollte eine `text`-Eigenschaft mit dem Wert `You enter the store.` haben.
+Your second `locations` object should have a `text` property with the value of `"You enter the store."`.
 
 ```js
 assert.equal(locations[1].text, "You enter the store.");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
index d382171e171..834f1a4a614 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
@@ -11,19 +11,19 @@ Jetzt kannst du einen Teil deines Codes konsolidieren. Beginne, indem du den Cod
 
 # --hints--
 
-Deine `update` Funktion sollte `button1.innerText` auf `Go to store` setzen.
+Your `update` function should set `button1.innerText` to `"Go to store"`.
 
 ```js
 assert.match(update.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-Deine `update`-Funktion sollte `button2.innerText` auf `Go to cave` setzen.
+Your `update` function should set `button2.innerText` to `"Go to cave"`.
 
 ```js
 assert.match(update.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-Deine `update`-Funktion sollte `button3.innerText` auf `Fight dragon` setzen.
+Your `update` function should set `button3.innerText` to `"Fight dragon"`.
 
 ```js
 assert.match(update.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -47,7 +47,7 @@ Deine `update` Funktion sollte `button3.onclick` auf `fightDragon` setzen.
 assert.match(update.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-Deine `update`-Funktion sollte `text.innerText` auf `You are in the town square. You see a sign that says \"Store\".` setzen.
+Your `update` function should set `text.innerText` to `"You are in the town square. You see a sign that says \"Store\"."`.
 
 ```js
 assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town square. You see a sign that says \\"Store\\"\."/);
@@ -56,13 +56,13 @@ assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town squa
 Deine `goTown`-Funktion sollte leer sein.
 
 ```js
-assert.match(goTown.toString(), /function goTown\(\) \{\}/);
+assert.match(goTown.toString(), /function goTown\(\s*\) \{\}/);
 ```
 
 Deine `goStore`-Funktion sollte leer sein.
 
 ```js
-assert.match(goStore.toString(), /function goStore\(\) \{\}/);
+assert.match(goStore.toString(), /function goStore\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
index 8f2c2558ec8..7f582084d24 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
@@ -20,13 +20,13 @@ myFunction();
 Du solltest die `update`-Funktion in der `goTown`-Funktion aufrufen.
 
 ```js
-assert.match(goTown.toString(), /update\(\)/);
+assert.match(goTown.toString(), /update\(\s*\)/);
 ```
 
 Vergiss das abschließende Semikolon nicht.
 
 ```js
-assert.match(goTown.toString(), /update\(\);/);
+assert.match(goTown.toString(), /update\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
index 9bb0863fbc7..81db6309fb6 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
@@ -20,7 +20,7 @@ myFunction(arg)
 Du solltest das `locations`-Array an den `update`-Aufruf übergeben.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
index 06a8a80fa23..9c0c35f459e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
@@ -7,7 +7,7 @@ dashedName: step-62
 
 # --description--
 
-Der `locations`-Array enthält zwei Standorte: den `town square` und den `store`. Derzeit übergibst du das gesamte Array an die `update`-Funktion.
+The `locations` array contains two locations: the `"town square"` and the `"store"`. Derzeit übergibst du das gesamte Array an die `update`-Funktion.
 
 Füge nur das erste Element deines `locations`-Arrays ein, indem du am Ende der Variable `[0]` hinzufügst. Zum Beispiel: `myFunction(arg[0]);`.
 
@@ -18,25 +18,25 @@ Diese Schreibweise nennt man <dfn>Klammer-Notation</dfn>. Werte in einem Array w
 Du solltest die Klammer-Notation bei `locations` verwenden.
 
 ```js
-assert.match(code, /locations\[/);
+assert.match(code, /locations\s*\[/);
 ```
 
 Du solltest auf das erste Objekt im `locations`-Array zugreifen. Denke daran, dass Arrays nullbasiert sind.
 
 ```js
-assert.match(code, /locations\[0\]/);
+assert.match(code, /locations\s*\[\s*0\s*\]/);
 ```
 
 Du solltest das erste Objekt im `locations`-Array an die `update`-Funktion übergeben.
 
 ```js
-assert.match(code, /update\(locations\[0\]\);/);
+assert.match(code, /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 Dieser Aufruf sollte sich noch immer in deiner `goTown()`-Funktion befinden.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\[0\]\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
index f50609996b5..fbfebaa005a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
@@ -9,20 +9,20 @@ dashedName: step-63
 
 Jetzt muss deine `update`-Funktion das Argument verwenden, das du ihr übergibst.
 
-Ändere in der `update`-Funktion den Wert der `button1.innerText`-Zuweisung zu `location["button text"]`. Auf diese Weise verwendest du die Klammer-Notation, um die `button text`-Eigenschaft des an die Funktion übergebenen `location`-Objekts zu erhalten.
+Ändere in der `update`-Funktion den Wert der `button1.innerText`-Zuweisung zu `location["button text"]`. That way, you use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 # --hints--
 
-Deine `update`-Funktion sollte die Klammer-Notation verwenden, um an die `button text`-Eigenschaft des `location`-Objekts heranzukommen, das an die Funktion übergeben wurde.
+Your `update` function should use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 ```js
 assert.match(update.toString(), /location[('|")button text\1]/);
 ```
 
-Du solltest den Wert der `button text`-Eigenschaft des `location`-Objekts der `innerText`-Eigenschaft von `button1` zuweisen.
+You should assign the value of the `"button text"` property of the `location` object to the `innerText` property of `button1`.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
index 41dccee64c9..ddd083401bd 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
@@ -7,20 +7,20 @@ dashedName: step-64
 
 # --description--
 
-`location["button text"]` ist ein Array mit drei Elementen. Ändere den `button1.innerText`-Auftrag so, dass er stattdessen dem ersten Element dieses Arrays entspricht.
+`location["button text"]` ist ein Array mit drei Elementen. Change the `button1.innerText` assignment to be `location["button text"][0]` which represents the first element of the array.
 
 # --hints--
 
-You should access the first element of the `button text` property of the `location` parameter.
+You should access the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.innerText` property to be the first element of the `button text` property of the `location` parameter.
+You should set the `button1.innerText` property to be the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
index 01b6f3d691f..3ada3f660a1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
@@ -7,32 +7,32 @@ dashedName: step-65
 
 # --description--
 
-Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `button text` array, respectively.
+Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `"button text"` array, respectively.
 
 # --hints--
 
-You should access the second element of the `button text` property of the `location` parameter.
+You should access the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.innerText` property to be the second element of the `button text` property of the `location` parameter.
+You should set the `button2.innerText` property to be the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.innerText\s*=\s*location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /button2\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button text` property of the `location` parameter.
+You should access the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.innerText` property to be the third element of the `button text` property of the `location` parameter.
+You should set the `button3.innerText` property to be the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.innerText\s*=\s*location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /button3\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
index 32980e66b93..f6adabed604 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
@@ -7,44 +7,44 @@ dashedName: step-66
 
 # --description--
 
-Aktualisiere die `onclick`-Zuweisungen der drei Schaltflächen nach demselben Muster wie für den Schaltflächentext, sodass sie den ersten, zweiten und dritten Wert der `button functions`-Arrays darstellen.
+Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `"button functions"` array.
 
 # --hints--
 
-You should access the first element of the `button functions` property of the `location` parameter.
+You should access the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.onclick` property to be the first element of the `button functions` property of the `location` parameter.
+You should set the `button1.onclick` property to be the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.onclick\s*=\s*location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /button1\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should access the second element of the `button functions` property of the `location` parameter.
+You should access the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.onclick` property to be the second element of the `button functions` property of the `location` parameter.
+You should set the `button2.onclick` property to be the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.onclick\s*=\s*location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /button2\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button functions` property of the `location` parameter.
+You should access the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.onclick` property to be the third element of the `button functions` property of the `location` parameter.
+You should set the `button3.onclick` property to be the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.onclick\s*=\s*location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /button3\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
index 84c0c124884..0a763c0ea1b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
@@ -22,7 +22,7 @@ assert.match(goStore.toString(), /update\(/);
 Deine `goStore`-Funktion sollte das zweite Element des `locations`-Arrays als dein Argument an `update()` übergeben.
 
 ```js
-assert.match(goStore.toString(), /update\(locations\[1\]\)/);
+assert.match(goStore.toString(), /update\(\s*locations\s*\[\s*1\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
index 4c24c435f92..d45a1dac737 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
@@ -26,13 +26,13 @@ assert.isFunction(fightBeast);
 `fightSlime` sollte leer sein.
 
 ```js
-assert.match(fightSlime.toString(), /function fightSlime\(\) \{\}/);
+assert.match(fightSlime.toString(), /function fightSlime\(\s*\) \{\}/);
 ```
 
 `fightBeast` sollte leer sein.
 
 ```js
-assert.match(fightBeast.toString(), /function fightBeast\(\) \{\}/);
+assert.match(fightBeast.toString(), /function fightBeast\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
index b3e8781830f..11a77f64d50 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
@@ -9,14 +9,13 @@ dashedName: step-70
 
 Füge ein drittes Objekt zum `locations` Array hinzu. Gib ihm die gleichen Eigenschaften wie den anderen beiden Objekten.
 
-Setze `name` auf `cave`. Setze `button text` auf ein Array mit den Strings `Fight slime`, `Fight fanged beast`, und `Go to town square`. Setze die `button functions` auf ein Array mit den Variablen `fightSlime`, `fightBeast`, und `goTown`. Setze die `text`-Eigenschaft auf `You enter the cave. You see some monsters.`.
+Setze `name` auf `cave`. Set `button text` to an array with the strings `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`. Set the `"button functions"` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `"You enter the cave. You see some monsters."`.
 
 # --hints--
 
 Du solltest drei Werte in deinem `locations`-Array haben.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 3);
 ```
 
@@ -26,19 +25,19 @@ Dein dritter `locations`-Wert sollte ein Objekt sein.
 assert.isObject(locations[2]);
 ```
 
-Your third `locations` object should have a `name` property with the value of `cave`.
+Your third `locations` object should have a `name` property with the value of `"cave"`.
 
 ```js
 assert.equal(locations[2].name, "cave");
 ```
 
-Dein drittes `locations`-Objekt sollte eine `button text`-Eigenschaft haben, welche ein Array ist.
+Your third `locations` object should have a `"button text"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button text"]);
 ```
 
-Deine `button text`-Eigenschaft sollte die Stringwerte `Fight slime`, `Fight fanged beast`, und `Go to town square` haben.
+Your `"button text"` property should have the string values `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[2]["button text"][0], "Fight slime");
@@ -46,13 +45,13 @@ assert.equal(locations[2]["button text"][1], "Fight fanged beast");
 assert.equal(locations[2]["button text"][2], "Go to town square");
 ```
 
-Dein drittes `locations`-Objekt sollte eine `button functions`-Eigenschaft haben, die ein Array ist.
+Your third `locations` object should have a `"button functions"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button functions"]);
 ```
 
-Deine `button functions`-Eigenschaft sollte die Funktionswerte `fightSlime`, `fightBeast`, und `goTown` haben.
+Your `"button functions"` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
 
 ```js
 assert.equal(locations[2]["button functions"][0], fightSlime);
@@ -66,7 +65,7 @@ Dein drittes `locations`-Objekt sollte eine `text`-Eigenschaft haben, die ein St
 assert.isString(locations[2].text);
 ```
 
-Dein drittes `locations`-Objekt sollte eine `text`-Eigenschaft mit dem Wert `You enter the cave. You see some monsters.` haben.
+Your third `locations` object should have a `text` property with the value of `"You enter the cave. You see some monsters."`.
 
 ```js
 assert.equal(locations[2].text, "You enter the cave. You see some monsters.");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
index 5d968615601..3182ac5ac5d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
@@ -7,7 +7,7 @@ dashedName: step-71
 
 # --description--
 
-Da du nun ein `cave`-Ortsobjekt hast, aktualisiere deine `goCave`-Funktion, um `update` aufzurufen und den neuen `cave` Ort zu übergeben. Denke daran, dass dies das dritte Element in deinem `locations`-Array ist.
+Now that you have a `"cave"` location object, update your `goCave` function to call `update` and pass that new `"cave"` location. Denke daran, dass dies das dritte Element in deinem `locations`-Array ist.
 
 Vergesse nicht, deinen `console.log`-Aufruf zu entfernen!
 
@@ -16,19 +16,19 @@ Vergesse nicht, deinen `console.log`-Aufruf zu entfernen!
 Du solltest die Klammerschreibweise verwenden, um auf das dritte Element in deinem `locations`-Array zuzugreifen.
 
 ```js
-assert.match(code, /locations\[2\]/);
+assert.match(code, /locations\s*\[\s*2\s*\]/);
 ```
 
 Du solltest das dritte Element in deinem `locations`-Array an `update` übergeben.
 
 ```js
-assert.match(code, /update\(locations\[2\]\)/);
+assert.match(code, /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 Du solltest `update` mit dem dritten Element in deinem `locations`-Array in deiner `goCave`-Funktion aufrufen.
 
 ```js
-assert.match(goCave.toString(), /update\(locations\[2\]\)/);
+assert.match(goCave.toString(), /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 Du solltest die `console.log`-Anweisung nicht in deiner `goCave`-Funktion haben.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
index 8670af8b41d..6f80b212407 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
@@ -7,7 +7,7 @@ dashedName: step-72
 
 # --description--
 
-Now that your `store` and `cave` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
+Now that your `"store"` and `"cave"` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
 
 For example, here is how you would set `num` equal to `5` less than `num`: `num = num - 5;`.
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
index 558240b5757..356c98bc696 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
@@ -19,7 +19,7 @@ const total = document.querySelector('#total');
 total.innerText = value;
 ```
 
-Du kannst es testen, indem du auf deinen "Go to store"-Button und anschließend auf deinen "Buy Health"-Button klickst.
+You can test this by clicking your `"Go to store"` button, followed by your `"Buy Health"` button.
 
 **Hinweis:** Deine Antwort sollte nur aus zwei Zeilen Code bestehen.
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
index 2967ead01bb..b1f2797f5a3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
@@ -7,17 +7,20 @@ dashedName: step-76
 
 # --description--
 
-Was passiert, wenn der Spieler nicht genügend Gold hat, um Gesundheit zu kaufen? Wenn du den Code unter bestimmten Bedingungen ausführen möchtest, kannst du die `if`-Anweisung verwenden. Füge den gesamten Code deiner `buyHealth`-Funktion in eine `if`-Anweisung ein. Zum Beispiel:
+Was passiert, wenn der Spieler nicht genügend Gold hat, um Gesundheit zu kaufen? When you want to run code conditionally, you can use the <dfn>if</dfn> statement.
+
+An `if` statement is used to make decisions in code. The keyword `if` is followed by a condition in parentheses. If the condition is true, the code inside the curly braces `{}` is executed. If the condition is false, the code inside the curly braces is skipped.
+
+Here is an example of an `if` statement:
 
 ```js
-function myFunction() {
-  if ("condition") {
-    console.log("Hello World!");
-  }
+const num = 5;
+if (num >= 3) {
+  console.log("This code will run because num is greater than or equal to 3.");
 }
 ```
 
-For now, the `if` statement condition should be set to the string `condition` as a placeholder.
+Start by placing all of the code in your `buyHealth` function inside an `if` statement. For the `if` statement condition, check if `gold` is greater than or equal to `10`.
 
 # --hints--
 
@@ -27,16 +30,16 @@ Deine `buyHealth`-Funktion sollte eine `if`-Anweisung haben.
 assert.match(buyHealth.toString(), /if/);
 ```
 
-Deine `if`-Anweisung sollte den String `condition` für die Bedingung enthalten.
+Your `if` statement should check if `gold` is greater than or equal to `10`.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)/);
 ```
 
 Der gesamte Code für `buyHealth` sollte innerhalb der `if`-Anweisung stehen.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)\s*\{[\s\S]*\}/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)\s*{\s*gold\s*-=\s*10;\s*health\s*\+=\s*10;\s*goldText\.innerText\s*=\s*gold;\s*healthText\.innerText\s*=\s*health;\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
index 04b0423b418..549861f80f2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c5db7888af27af23f0dd
-title: Schritt 78
+title: Step 77
 challengeType: 0
-dashedName: step-78
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
index a6da25ac6cb..fe629a5f496 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8c65b75664c28a8e59c16
-title: Schritt 79
+title: Step 78
 challengeType: 0
-dashedName: step-79
+dashedName: step-78
 ---
 
 # --description--
 
-Setze in der `else`-Anweisung `text.innerText` gleich `You do not have enough gold to buy health.`.
+Inside the `else` statement, set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 # --hints--
 
-Your `buyHealth` function should set `text.innerText` to equal `You do not have enough gold to buy health.`.
+Your `buyHealth` function should set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 ```js
 assert.match(buyHealth.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy health\.\1/);
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
index 7d1f22ef32d..8b5c72cf355 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c6815f5f1a29735efe1b
-title: Schritt 80
+title: Step 79
 challengeType: 0
-dashedName: step-80
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
index 79d7745ed21..8b6af0420f8 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c7322e42962ad53ad204
-title: Schritt 81
+title: Step 80
 challengeType: 0
-dashedName: step-81
+dashedName: step-80
 ---
 
 # --description--
 
-Genau wie dein `locations`-Array wird auch dein `weapons`-Array Objekte enthalten. Füge dem `weapons`-Array vier Objekte hinzu, jedes mit zwei Eigenschaften: `name` und `power`. Der erste sollte den `name` auf `stick` und die `power` auf `5` gesetzt haben. Der zweite sollte `dagger` und `30` sein. Der dritte, `claw hammer` und `50`. Der vierte, `sword` und `100`.
+Genau wie dein `locations`-Array wird auch dein `weapons`-Array Objekte enthalten. Füge dem `weapons`-Array vier Objekte hinzu, jedes mit zwei Eigenschaften: `name` und `power`. The first should have the `name` set to `"stick"` and the `power` set to `5`. The second should be `"dagger"` and `30`. The third, `"claw hammer"` and `50`. The fourth, `"sword"` and `100`.
 
 # --hints--
 
@@ -26,28 +26,28 @@ assert.isObject(weapons[2]);
 assert.isObject(weapons[3]);
 ```
 
-Dein erstes `weapons`-Objekt sollte den `name` auf `stick` und die `power` auf `5` gesetzt haben.
+Your first `weapons` object should have the `name` set to `"stick"` and the `power` set to `5`.
 
 ```js
 assert.equal(weapons[0].name, 'stick');
 assert.equal(weapons[0].power, 5);
 ```
 
-Dein zweites `weapons`-Objekt sollte den `name` auf `dagger` und die `power` auf `30` gesetzt haben.
+Your second `weapons` object should have the `name` set to `"dagger"` and the `power` set to `30`.
 
 ```js
 assert.equal(weapons[1].name, 'dagger');
 assert.equal(weapons[1].power, 30);
 ```
 
-Dein drittes `weapons`-Objekt sollte den `name` auf `claw hammer` und die `power` auf `50` gesetzt haben.
+Your third `weapons` object should have the `name` set to `"claw hammer"` and the `power` set to `50`.
 
 ```js
 assert.equal(weapons[2].name, 'claw hammer');
 assert.equal(weapons[2].power, 50);
 ```
 
-Dein viertes `weapons`-Objekt sollte den `name` auf `sword` und die `power` auf `100` gesetzt haben.
+Your fourth `weapons` object should have the `name` set to `"sword"` and the `power` set to `100`.
 
 ```js
 assert.equal(weapons[3].name, 'sword');
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
index 67becdd2c18..9193afc956d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c7a59e72c02bb1c717d2
-title: Schritt 82
+title: Step 81
 challengeType: 0
-dashedName: step-82
+dashedName: step-81
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.include(buyWeapon.toString(), 'if');
 Deine `if`-Anweisung sollte überprüfen, ob `gold` größer oder gleich `30` ist.
 
 ```js
-assert.match(buyWeapon.toString(), /if\s*\(gold\s*>=\s*30\)/);
+assert.match(buyWeapon.toString(), /if\s*\(\s*gold\s*>=\s*30\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
index 5b17a372b5b..ca5e9d9d9b9 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c89e4272512d44fc1c66
-title: Schritt 83
+title: Step 82
 challengeType: 0
-dashedName: step-83
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
index b693a29ec97..ec2e665717d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c8cee8e5cf2e001789b4
-title: Schritt 84
+title: Step 83
 challengeType: 0
-dashedName: step-84
+dashedName: step-83
 ---
 
 # --description--
 
-Der Wert deiner `currentWeapon`-Variable entspricht einem Index im `weapons`-Array. Der Spieler beginnt mit einem `stick`, da `currentWeapon` bei `0` beginnt und `weapons[0]` die `stick`-Waffe ist.
+Der Wert deiner `currentWeapon`-Variable entspricht einem Index im `weapons`-Array. The player starts with a `"stick"`, since `currentWeapon` starts at `0` and `weapons[0]` is the `"stick"` weapon.
 
 In the `buyWeapon` function, use compound assignment to add `1` to `currentWeapon` - the user is buying the next weapon in the `weapons` array.
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
index 92c8bfcc273..beca2ec1f64 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ca22d29fe62f3952bdf5
-title: Schritt 85
+title: Step 84
 challengeType: 0
-dashedName: step-85
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
index f573531a8cb..2425bbe37c1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8cb19bd7f8a304e5427a1
-title: Schritt 86
+title: Step 85
 challengeType: 0
-dashedName: step-86
+dashedName: step-85
 ---
 
 # --description--
 
-Aktualisiere nun das `goldText`-Element so, dass es den neuen Wert von `gold` anzeigt, und aktualisiere das `text`-Element so, dass es `You now have a new weapon.` anzeigt.
+Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `"You now have a new weapon."`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ Du solltest die `innerText`-Eigenschaft des `goldText`-Elements so aktualisieren
 assert.match(buyWeapon.toString(), /goldText\.innerText\s*=\s*gold/);
 ```
 
-Du solltest die `innerText`-Eigenschaft des `text`-Elements so aktualisieren, dass sie `You now have a new weapon.` ergibt.
+You should update the `innerText` property of the `text` element to be `"You now have a new weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a new weapon\.\1/);
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
index faaf5c93daf..2313f97a813 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cbd1e3595431d5a2b3f1
-title: Schritt 87
+title: Step 86
 challengeType: 0
-dashedName: step-87
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
index 6590bb1f7c5..2c7bf0a5bda 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cce1b0c32c33017cf2e9
-title: Schritt 88
+title: Step 87
 challengeType: 0
-dashedName: step-88
+dashedName: step-87
 ---
 
 # --description--
@@ -22,7 +22,7 @@ let value = array[index];
 Du solltest `newWeapon` so aktualisieren, dass sie einen Wert von `weapons[currentWeapon]` hat.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
index 34c5bde215a..a687e1394cc 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ce1dfc990134162b3bd9
-title: Schritt 89
+title: Step 88
 challengeType: 0
-dashedName: step-89
+dashedName: step-88
 ---
 
 # --description--
@@ -14,7 +14,7 @@ dashedName: step-89
 Du solltest `newWeapon` so aktualisieren, dass sie einen Wert von `weapons[currentWeapon].name` hat.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]\.name;/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
index dc9fc546c59..0c817ccea42 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8ce73d0dce43468f6689c
-title: Schritt 90
+title: Step 89
 challengeType: 0
-dashedName: step-90
+dashedName: step-89
 ---
 
 # --description--
 
-You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `You now have a new weapon.` string to say `You now have a` and the name of the new weapon. Denke daran, den Satz mit einem Punkt zu beenden.
+You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `"You now have a new weapon."` string to say `"You now have a "` and the name of the new weapon. Denke daran, den Satz mit einem Punkt zu beenden.
 
-Hier ist ein Beispiel, das den String `Hello, our name is freeCodeCamp.` erzeugt:
+Here is an example that creates the string `"Hello, our name is freeCodeCamp."`:
 
 ```js
 const ourName = "freeCodeCamp";
@@ -18,7 +18,7 @@ const ourStr = "Hello, our name is " + ourName + ".";
 
 # --hints--
 
-Du solltest die `text.innerText`-Zuweisung aktualisieren, so dass sie mit dem String `You now have a` beginnt.
+You should update the `text.innerText` assignment to start with the string `"You now have a "`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a \1/);
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
index f2e414b3cdd..98d994e4737 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cf22272d6d35af80d4ac
-title: Schritt 91
+title: Step 90
 challengeType: 0
-dashedName: step-91
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
index af6cc578661..339ff0b09d0 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d0337d7c67377a4a76c6
-title: Schritt 92
+title: Step 91
 challengeType: 0
-dashedName: step-92
+dashedName: step-91
 ---
 
 # --description--
 
 Bislang wurde der alte Text jedes Mal gelöscht, sobald `text.innerText` aktualisiert wurde. Verwende dieses Mal den `+=`-Operator, um am Ende von `text.innerText`-Text hinzuzufügen.
 
-Füge den String `In your inventory you have:` hinzu - füge die Leerzeichen am Anfang und am Ende ein.
+Add the string `" In your inventory you have: "` - include the spaces at the beginning and the end.
 
 # --hints--
 
@@ -26,7 +26,7 @@ Du solltest den `+=`-Operator verwenden, um etwas zu `text.innerText` hinzuzufü
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*/)
 ```
 
-Du solltest den String `In your inventory you have:` am Ende von `text.innerText` hinzufügen. Achte auf die Leerzeichen!
+You should add the string `" In your inventory you have: "` to the end of `text.innerText`. Achte auf die Leerzeichen!
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
index 6855c8da132..d2d697233c5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d08668fa8b38732486e9
-title: Schritt 93
+title: Step 92
 challengeType: 0
-dashedName: step-93
+dashedName: step-92
 ---
 
 # --description--
@@ -11,7 +11,7 @@ At the end of the second `text.innerText` string you just added, use the concate
 
 # --hints--
 
-You should not change the `In your inventory you have:` string.
+You should not change the `" In your inventory you have: "` string.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
index 445097a595c..74466392000 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d0c4f12c2239b6618582
-title: Schritt 94
+title: Step 93
 challengeType: 0
-dashedName: step-94
+dashedName: step-93
 ---
 
 # --description--
 
-Füge eine `else`-Anweisung zu deiner `buyWeapon`-Funktion hinzu. Setze in diesem Statement `text.innerText` gleich `You do not have enough gold to buy a weapon.`.
+Füge eine `else`-Anweisung zu deiner `buyWeapon`-Funktion hinzu. In that statement, set `text.innerText` to equal `"You do not have enough gold to buy a weapon."`.
 
 # --hints--
 
@@ -24,13 +24,13 @@ const split = buyWeapon.toString().split(/\s|\n/);
 assert.isAbove(split.indexOf('else'), split.indexOf('if'));
 ```
 
-Du solltest `text.innerText` auf `You do not have enough gold to buy a weapon.` setzen.
+You should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy a weapon.\1/);
 ```
 
-Deine `else`-Anweisung sollte `text.innerText` auf `You do not have enough gold to buy a weapon.` setzen.
+Your `else` statement should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 gold = 20;
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
index 00620ad601f..76443964d92 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d0fdf2dad83a92883a80
-title: Schritt 95
+title: Step 94
 challengeType: 0
-dashedName: step-95
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
index 349105d53df..521dde4cefa 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d143f2a58e3b6d6e9c33
-title: Schritt 96
+title: Step 95
 challengeType: 0
-dashedName: step-96
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
index be109f7d5c6..8648615f99f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d1c72e8bb13c2074d93c
-title: Schritt 97
+title: Step 96
 challengeType: 0
-dashedName: step-97
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
index 9f4ce4b2080..0b496e0aa8e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d2146a3e853d0a6e28ca
-title: Schritt 98
+title: Step 97
 challengeType: 0
-dashedName: step-98
+dashedName: step-97
 ---
 
 # --description--
 
-Füge eine `else`-Anweisung für deine äußere `if`-Anweisung hinzu. Setze in dieser neuen `else`-Anweisung `text.innerText` auf `You already have the most powerful weapon!`.
+Füge eine `else`-Anweisung für deine äußere `if`-Anweisung hinzu. Inside this new `else` statement, set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 # --hints--
 
@@ -18,13 +18,13 @@ const matches = buyWeapon.toString().match(/else/g);
 assert.equal(matches.length, 2);
 ```
 
-Du solltest `text.innerText` auf `You already have the most powerful weapon!` setzen.
+You should set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 ```js
 assert.match(buyWeapon.toString(), /('|")You already have the most powerful weapon!\1/);
 ```
 
-Du solltest deinen `text.innerText` zu `You already have the most powerful weapon!` innerhalb deiner äußeren `else`-Anweisung ändern.
+You should modify your `text.innerText` to `"You already have the most powerful weapon!"` within your outer `else` statement.
 
 ```js
 currentWeapon = 5;
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
index 40e4d60b5a3..3c321bd615e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d24c97461b3ddb9397c8
-title: Schritt 99
+title: Step 98
 challengeType: 0
-dashedName: step-99
+dashedName: step-98
 ---
 
 # --description--
 
 Sobald ein Spieler die mächtigste Waffe besitzt, kannst du ihm die Möglichkeit geben, seine alten Waffen zu verkaufen.
 
-Lege in der äußeren `else`-Anweisung `button2.innerText` auf `Sell weapon for 15 gold` fest. Setze außerdem `button2.onclick` auf den Funktionsnamen `sellWeapon`.
+In the outer `else` statement, set `button2.innerText` to `"Sell weapon for 15 gold"`. Setze außerdem `button2.onclick` auf den Funktionsnamen `sellWeapon`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ Du solltest den Wert von `button2.innerText` festlegen.
 assert.match(buyWeapon.toString(), /button2\.innerText/);
 ```
 
-Du solltest den Wert von `button2.innerText` auf `Sell weapon for 15 gold` festlegen.
+You should set the value of `button2.innerText` to `"Sell weapon for 15 gold"`.
 
 ```js
 assert.match(buyWeapon.toString(), /button2\.innerText\s*=\s*('|")Sell weapon for 15 gold\1;/);
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
index 9dc7ba9b1d1..517ea7a14de 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d2e2a073be3edb46116f
-title: Schritt 100
+title: Step 99
 challengeType: 0
-dashedName: step-100
+dashedName: step-99
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.isFunction(sellWeapon);
 `sellWeapon` sollte eine leere Funktion sein.
 
 ```js
-assert.match(sellWeapon.toString(), /sellWeapon\(\)\s*\{\s*\}/);
+assert.match(sellWeapon.toString(), /sellWeapon\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
index 957c998a53e..c1f7aa36336 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d31ebbc10e3fe1b28e03
-title: Schritt 101
+title: Step 100
 challengeType: 0
-dashedName: step-101
+dashedName: step-100
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(sellWeapon.toString(), /if/);
 Deine `if`-Anweisung sollte prüfen, ob `inventory.length` größer ist als `1`.
 
 ```js
-assert.match(sellWeapon.toString(), /if\s*\(inventory\.length\s*>\s*1\)/);
+assert.match(sellWeapon.toString(), /if\s*\(\s*inventory\.length\s*>\s*1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
index c447e556108..2c125dbc04a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d35660db4040ba292193
-title: Schritt 102
+title: Step 101
 challengeType: 0
-dashedName: step-102
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
index 437a2a78c6e..dc9e59edaff 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d382cd075f4169223e14
-title: Schritt 103
+title: Step 102
 challengeType: 0
-dashedName: step-103
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
index 9321870e11a..7fce8eae41d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d539dc11cb42b5dd7ec8
-title: Schritt 104
+title: Step 103
 challengeType: 0
-dashedName: step-104
+dashedName: step-103
 ---
 
 # --description--
@@ -21,19 +21,19 @@ Use the `shift()` method to take the first element from the `inventory` array an
 Deine `sellWeapon`-Funktion sollte die `shift()`-Methode verwenden.
 
 ```js
-assert.match(sellWeapon.toString(), /shift\(\)/);
+assert.match(sellWeapon.toString(), /shift\(\s*\)/);
 ```
 
 Du solltest die `shift()`-Methode für das `inventory`-Array verwenden.
 
 ```js
-assert.match(sellWeapon.toString(), /inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /inventory\.shift\(\s*\)/);
 ```
 
 Du solltest deiner `currentWeapon`-Variable den Wert von `inventory.shift()` zuweisen.
 
 ```js
-assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
index 406c9c0f97f..71fa493894b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d61ddfe35744369365b7
-title: Schritt 105
+title: Step 104
 challengeType: 0
-dashedName: step-105
+dashedName: step-104
 ---
 
 # --description--
 
-After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `You sold a`, then `currentWeapon`, then the string `.`.
+After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `"You sold a "`, then `currentWeapon`, then the string `"."`.
 
 # --hints--
 
@@ -17,19 +17,19 @@ Du solltest den Zuweisungsoperator mit `text.innerText` verwenden.
 assert.match(sellWeapon.toString(), /text\.innerText\s*=/);
 ```
 
-Du solltest `You sold a` to `text.innerText` hinzufügen. Die Abstände sind wichtig.
+You should add `"You sold a "` to `text.innerText`. Die Abstände sind wichtig.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1/);
 ```
 
-You should add the value of `currentWeapon` to the `You sold a` string. Verwende den Verkettungsoperator, um dies in derselben Zeile zu tun.
+You should add the value of `currentWeapon` to the `"You sold a "` string. Verwende den Verkettungsoperator, um dies in derselben Zeile zu tun.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a\s\1\s*\+\s*\_currentWeapon/);
 ```
 
-Du solltest den String `.` zu dem Wert von `currentWeapon` hinzufügen. Verwende den Verkettungsoperator, um dies in derselben Zeile zu tun.
+You should add the string `"."` to the value of `currentWeapon`. Verwende den Verkettungsoperator, um dies in derselben Zeile zu tun.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1\s*\+\s*\_currentWeapon\s+\+\s+('|")\.\2/);
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
index b28ecf0d439..619203316ba 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d6c7001ebc45350e3d16
-title: Schritt 106
+title: Step 105
 challengeType: 0
-dashedName: step-106
+dashedName: step-105
 ---
 
 # --description--
 
-Now use the `+=` operator to add the string `In your inventory you have:` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `In your inventory you have:` string.
+Now use the `+=` operator to add the string `" In your inventory you have: "` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `" In your inventory you have: "` string.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const matches = sellWeapon.toString().match(/text\.innerText\s*\+=/g);
 assert.equal(matches.length, 1);
 ```
 
-Du solltest den String `In your inventory you have:` zur zweiten `text.innerText`-Zeile hinzufügen. Die Abstände sind wichtig.
+You should add the string `" In your inventory you have: "` to the second `text.innerText` line. Die Abstände sind wichtig.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*\+=\s*('|") In your inventory you have: \1/);
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
index 9cff57702d0..50a6c2fa46e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d7b8ab568b4649998954
-title: Schritt 107
+title: Step 106
 challengeType: 0
-dashedName: step-107
+dashedName: step-106
 ---
 
 # --description--
 
-Verwende eine `else`-Anweisung, die ausgeführt werden soll, wenn die `inventory`-Länge nicht größer als eins ist. Set the `text.innerText` to say `Don't sell your only weapon!`.
+Verwende eine `else`-Anweisung, die ausgeführt werden soll, wenn die `inventory`-Länge nicht größer als eins ist. Set the `text.innerText` to say `"Don't sell your only weapon!"`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ Deine `sellWeapon`-Funktion sollte eine `else`-Anweisung haben.
 assert.match(sellWeapon.toString(), /else/);
 ```
 
-Du solltest `text.innerText` auf `Don't sell your only weapon!` setzen.
+You should set `text.innerText` to `"Don't sell your only weapon!"`.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")Don't sell your only weapon!\1/);
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
index e8da0398722..68c00ed7212 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d81f539f004776dd9b1e
-title: Schritt 108
+title: Step 107
 challengeType: 0
-dashedName: step-108
+dashedName: step-107
 ---
 
 # --description--
 
 Nun kannst du den Code zur Bekämpfung von Monstern starten. To keep your code organized, your `fightDragon` function has been moved for you to be near the other `fight` functions.
 
-Definiere unter deinem `weapons`-Array eine `monsters`-Variable und gib ihr ein Array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. Die Werte des ersten Objekts sollten in dieser Reihenfolge `slime`, `2` und `15` sein. Der zweite sollte `fanged beast`, `8` und `60` sein. Der dritte sollte `dragon`, `20` und `300` sein.
+Definiere unter deinem `weapons`-Array eine `monsters`-Variable und gib ihr ein Array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. The first object's values should be `"slime"`, `2`, and `15`, in order. The second should be `"fanged beast"`, `8`, and `60`. The third should be `"dragon"`, `20`, and `300`.
 
 # --hints--
 
@@ -37,7 +37,7 @@ Dein `monsters`-Array sollte 3 Objekte haben.
 assert(monsters.every(val => typeof val === "object"));
 ```
 
-Der erste Wert in deinem `monsters`-Array sollte ein Objekt mit einer `name`-Eigenschaft von `slime` sein.
+The first value in your `monsters` array should be an object with a `name` property set to `"slime"`.
 
 ```js
 assert.equal(monsters[0].name, "slime");
@@ -55,7 +55,7 @@ Der erste Wert in deinem `monsters`-Array sollte ein Objekt mit einer `health`-E
 assert.equal(monsters[0].health, 15);
 ```
 
-Der zweite Wert in deinem `monsters`-Array sollte ein Objekt mit einer `name`-Eigenschaft von `fanged beast` sein.
+The second value in your `monsters` array should be an object with a `name` property set to `"fanged beast"`.
 
 ```js
 assert.equal(monsters[1].name, "fanged beast");
@@ -73,7 +73,7 @@ Der zweite Wert in deinem `monsters`-Array sollte ein Objekt mit einer `health`-
 assert.equal(monsters[1].health, 60);
 ```
 
-Der dritte Wert in deinem `monsters`-Array sollte ein Objekt mit einer `name`-Eigenschaft von `dragon` sein.
+The third value in your `monsters` array should be an object with a `name` property set to `"dragon"`.
 
 ```js
 assert.equal(monsters[2].name, "dragon");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
index 4e522751932..49ab95010ef 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd468debb449b4454086
-title: Schritt 109
+title: Step 108
 challengeType: 0
-dashedName: step-109
+dashedName: step-108
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
index 7346c525b41..405c87b0523 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd9cdb16324b04cfd958
-title: Schritt 110
+title: Step 109
 challengeType: 0
-dashedName: step-110
+dashedName: step-109
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.notMatch(fightSlime.toString(), /let|const/);
 Du solltest die `goFight`-Funktion aufrufen.
 
 ```js
-assert.match(fightSlime.toString(), /goFight\(\);/);
+assert.match(fightSlime.toString(), /goFight\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
index f593615acff..5d80b06c1d7 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8dfcf7fb1044d2f478fd1
-title: Schritt 111
+title: Step 110
 challengeType: 0
-dashedName: step-111
+dashedName: step-110
 ---
 
 # --description--
 
-Verwende diesen Code nach demselben Muster in den `fightBeast`- und `fightDragon`-Funktionen. Denke daran, dass `beast` am Index `1` und `dragon` am Index `2` ist. Enferne auch den `console.log`-Aufruf aus deiner `fightDragon`-Funktion.
+Following the same pattern as the `fightSlime` function, use that code in the `fightBeast` and `fightDragon` functions. Denke daran, dass `beast` am Index `1` und `dragon` am Index `2` ist. Enferne auch den `console.log`-Aufruf aus deiner `fightDragon`-Funktion.
 
 # --hints--
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
index fbb6de8f30d..e23cc208e12 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e0d1d0110b4ec421489f
-title: Schritt 112
+title: Step 111
 challengeType: 0
-dashedName: step-112
+dashedName: step-111
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
index 522fe060462..8a3f65ba97c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
@@ -1,20 +1,19 @@
 ---
 id: 62a8e142f7f0bd4fed898de3
-title: Schritt 113
+title: Step 112
 challengeType: 0
-dashedName: step-113
+dashedName: step-112
 ---
 
 # --description--
 
-Füge ein neues Objekt am Ende des `locations`-Arrays hinzu, das die gleichen Eigenschaften wie die übrigen Objekte hat. Setze `name` auf `fight`, `button text` auf ein Array mit `Attack`, `Dodge` und `Run`, `button functions` auf ein Array mit `attack`, `dodge` und `goTown`, und `text` auf `You are fighting a monster.`.
+Füge ein neues Objekt am Ende des `locations`-Arrays hinzu, das die gleichen Eigenschaften wie die übrigen Objekte hat. Set `name` to `"fight"`, `"button text"` to an array with `"Attack"`, `"Dodge"`, and `"Run"`, `"button functions"` to an array with `attack`, `dodge`, and `goTown`, and `text` to `"You are fighting a monster."`.
 
 # --hints--
 
 Dein `locations`-Array sollte 4 Werte enthalten.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 4);
 ```
 
@@ -24,25 +23,25 @@ Dein neuer Wert sollte ein Objekt sein.
 assert.isObject(locations[3]);
 ```
 
-Dein neues Objekt sollte eine `name`-Eigenschaft auf `fight` gesetzt haben.
+Your new object should have a `name` property set to `"fight"`.
 
 ```js
 assert.equal(locations[3].name, "fight");
 ```
 
-Your new object should have a `button text` property set to an array with the strings `Attack`, `Dodge`, and `Run`.
+Your new object should have a `"button text"` property set to an array with the strings `"Attack"`, `"Dodge"`, and `"Run"`.
 
 ```js
 assert.deepEqual(locations[3]["button text"], ["Attack", "Dodge", "Run"]);
 ```
 
-Your new object should have a `button functions` property set to an array with the variables `attack`, `dodge`, and `goTown`.
+Your new object should have a `"button functions"` property set to an array with the variables `attack`, `dodge`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[3]["button functions"], [attack, dodge, goTown]);
 ```
 
-Dein neues Objekt sollte eine `text`-Eigenschaft auf `You are fighting a monster.` gesetzt haben.
+Your new object should have a `text` property set to `"You are fighting a monster."`.
 
 ```js
 assert.equal(locations[3].text, "You are fighting a monster.");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
index 6e473110f70..deb7d65d67b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e1dc897df55108bcb5e8
-title: Schritt 114
+title: Step 113
 challengeType: 0
-dashedName: step-114
+dashedName: step-113
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(goFight.toString(), /update/);
 Du solltest das vierte Objekt in deiner `locations`-Auflistung deinem `update`-Aufruf übergeben.
 
 ```js
-assert.match(goFight.toString(), /update\(locations\[3\]\)/);
+assert.match(goFight.toString(), /update\(\s*locations\s*\[\s*3\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
index 80582341ef9..3e0cfa3a8ae 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e21398ad61520edb724f
-title: Schritt 115
+title: Step 114
 challengeType: 0
-dashedName: step-115
+dashedName: step-114
 ---
 
 # --description--
@@ -14,13 +14,13 @@ Setze unter deinem `update`-Aufruf die `monsterHealth` auf die Gesundheit des ak
 You should use bracket notation to access the `monsters` array at the `fighting` index.
 
 ```js
-assert.match(goFight.toString(), /monsters\[fighting\]/);
+assert.match(goFight.toString(), /monsters\s*\[\s*fighting\s*\]/);
 ```
 
 Du solltest der `monsterHealth`-Variable den Wert von `monsters[fighting]` zuweisen.
 
 ```js
-assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\[fighting\](\.health|\[('|")health\2\])/);
+assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\s*\[\s*fighting\s*\]\s*(\.health|\[\s*('|")health\2\s*\])/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
index d80c6933228..5ee0a426810 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
@@ -1,18 +1,25 @@
 ---
 id: 62a8e24c673b075317cc0b09
-title: Schritt 116
+title: Step 115
 challengeType: 0
-dashedName: step-116
+dashedName: step-115
 ---
 
 # --description--
 
-Das HTML-Element, das die Werte des Monsters anzeigt, wurde mit CSS ausgeblendet. Display the `monsterStats` element by updating the `display` property of the `style` property to `block`. For example, updating the `first` property of the `name` property of `user` would look like:
+By default, the HTML element that shows the monster's stats has been hidden with CSS. When the player clicks the "Fight dragon" button, the monster's stats should be displayed. You can accomplish this by using the <dfn>style</dfn> and <dfn>display</dfn> properties on the `monsterStats` element.
+
+The `style` property is used to access the inline style of an element and the `display` property is used to set the visibility of an element.
+
+Here is an example of how to update the display for a paragraph element:
 
 ```js
-user.name.first = "Naomi";
+const paragraph = document.querySelector('p');
+paragraph.style.display = 'block';
 ```
 
+Display the `monsterStats` element by updating the `display` property of the `style` property to `block`.
+
 # --hints--
 
 You should use dot notation to access the `style` property of `monsterStats`.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
index 2768e749a78..22ff5b5899a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e271f8e3d1541f9624ad
-title: Schritt 117
+title: Step 116
 challengeType: 0
-dashedName: step-117
+dashedName: step-116
 ---
 
 # --description--
 
-Setze nun die `innerText`-Eigenschaft von `monsterName` auf die `name`-Eigenschaft des aktuellen Monsters. Mache das gleiche für `monsterHealthText` und die `health`-Eigenschaft.
+Now, you will need to update the text for the current monster's name and health.
+
+Start by assigning `monsters[fighting].name` to the `innerText` property of `monsterName`. Then, assign `monsterHealth` to the `innerText` property of `monsterHealthText`.
 
 # --hints--
 
@@ -17,22 +19,22 @@ Du solltest die Punktnotation verwenden, um auf die `innerText`-Eigenschaft von
 assert.match(goFight.toString(), /monsterName\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterName` to be the `name` value of the current monster. Denke daran, dass du das aktuelle Monster mit `monsters[fighting]` erhalten kannst.
+You should assign `monsters[fighting].name` to `monsterName.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\[fighting\]\.name/);
+assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
-Du solltest die Punktnotation verwenden, um auf die `innerText`-Eigenschaft von `monsterHealthText` zuzugreifen.
+You should use dot notation to access the `innerText` property of `monsterHealthText`.
 
 ```js
 assert.match(goFight.toString(), /monsterHealthText\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterHealthText` to be the `health` value of the current monster. You can get the current monster with `monsters[fighting]` or you can access this value using the `monsterHealth` variable that you previously assigned.
+You should assign `monsterHealth` to `monsterHealthText.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\[fighting\]\.health/);
+assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.health/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
index f77dd4bf178..400c914ede3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e35675c18c56354c08cf
-title: Schritt 118
+title: Step 117
 challengeType: 0
-dashedName: step-118
+dashedName: step-117
 ---
 
 # --description--
 
-Jetzt kannst du die `attack`-Funktion erstellen. First, update the `text` message to say `The <monster name> attacks.`, replacing `<monster name>` with the name of the monster. Denke daran, dass du dafür den Verkettungsoperator verwenden kannst.
+Jetzt kannst du die `attack`-Funktion erstellen. First, update the `text` message to say `"The <monster name> attacks."`, replacing `<monster name>` with the name of the monster. Denke daran, dass du dafür den Verkettungsoperator verwenden kannst.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1/);
 You should use the concatenation operator to add the value of `monsters[fighting].name` to the `The` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 You should use the concatenation operator to add the string `attacks.` to the `monsters[fighting].name` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name\s*\+\s*('|") attacks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name\s*\+\s*('|") attacks\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
index 060b58a6160..08726cac000 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e41e2f190c58404dd46e
-title: Schritt 119
+title: Step 118
 challengeType: 0
-dashedName: step-119
+dashedName: step-118
 ---
 
 # --description--
 
-On a new line, add the string `You attack it with your <weapon>.` to the `text` value, replacing `<weapon>` with the player's current weapon.
+On a new line, use the addition assignment operator(`+=`), to add the string `" You attack it with your <weapon>."` to the `text` value, replacing `<weapon>` with the player's current weapon. Additionally, remember that this line of text starts with a space so it will properly display.
 
 # --hints--
 
@@ -24,7 +24,7 @@ You should use compound assignment with `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=/);
 ```
 
-Du solltest den String `You attack it with your` zu deinem `text.innerText`-Wert hinzufügen. Denke daran, dass Leerzeichen wichtig sind.
+You should add the string `" You attack it with your "` to the `text.innerText` value. Denke daran, dass Leerzeichen wichtig sind.
 
 ```js
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1/);
@@ -33,13 +33,13 @@ assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it wit
 Du solltest den Verkettungsoperator verwenden, um die aktuelle Waffe zum String hinzuzufügen. Du solltest den aktuellen Wert mit `weapons[currentWeapon].name` erhalten.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name/);
 ```
 
-Du solltest den Verkettungsoperator verwenden, um dein String mit `.` zu beenden.
+You should use the concatenation operator to end your string with `"."`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name\s*\+\s*('|")\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*\+\s*('|")\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
index 78995b9abe4..9f33200dbd0 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e45cc600c3591cee671a
-title: Schritt 120
+title: Step 119
 challengeType: 0
-dashedName: step-120
+dashedName: step-119
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(attack.toString(), /health\s*-=/);
 Du solltest das aktuelle Level des Monsters von der `health` abziehen.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*monsters\[fighting\]\.level/);
+assert.match(attack.toString(), /health\s*-=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
index 5f190099301..ac76865ed0a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e49f4df7af5ae2d7a616
-title: Schritt 121
+title: Step 120
 challengeType: 0
-dashedName: step-121
+dashedName: step-120
 ---
 
 # --description--
 
-Setze `monsterHealth` auf `monsterHealth` minus die Stärke der aktuellen Waffe des Spielers. Denke daran, dass du die `currentWeapon`-Variable und die `power`-Eigenschaft hast.
+Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon.
+
+Remember that you can access the power of the player's current weapon using `weapons[currentWeapon].power`.
 
 # --hints--
 
@@ -17,22 +19,22 @@ You should use compound assignment to modify the `monsterHealth` variable.
 assert.match(attack.toString(), /monsterHealth\s*-=/);
 ```
 
-Du solltest bei `currentWeapon` die Klammer-Notation verwenden, um auf `weapons` zuzugreifen.
+You should use bracket notation with `currentWeapon` to access `weapons`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
-Du solltest die Punktnotation verwenden, um auf die `power`-Eigenschaft von `weapons[currentWeapon]` zuzugreifen.
+You should use dot notation to access the `power` property of `weapons[currentWeapon]`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
-Du solltest die `power` der aktuellen Waffe von `monsterHealth` abziehen.
+You should subtract the `power` of the current weapon from `monsterHealth`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
index 4f509b8a46a..b36f67b5cad 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8e4dc6a60f85bf256a0cb
-title: Schritt 122
+title: Step 121
 challengeType: 0
-dashedName: step-122
+dashedName: step-121
 ---
 
 # --description--
 
 The `Math` object in JavaScript contains static properties and methods for mathematical constants and functions. One of those is `Math.random()`, which generates a random number from `0` (inclusive) to `1` (exclusive). Eine andere ist `Math.floor()`, die eine gegebene Zahl auf die nächste ganze Zahl abrundet.
 
-Mit diesen kannst du eine Zufallszahl innerhalb eines Bereichs erzeugen. Dies erzeugt zum Beispiel eine Zufallszahl zwischen 1 und 5: `Math.floor(Math.random() * 5) + 1;`.
+Mit diesen kannst du eine Zufallszahl innerhalb eines Bereichs erzeugen. For example, this generates a random number between `1` and `5`: `Math.floor(Math.random() * 5) + 1;`.
 
 Following this pattern, use the addition operator (`+`) to add a random number between `1` and the value of `xp` to your `monsterHealth -= weapons[currentWeapon].power`.
 
@@ -24,7 +24,7 @@ assert.lengthOf(attack.toString().match(/monsterHealth/g), 1);
 Du solltest den `weapons[currentWeapon].power`-Wert erhöhen.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+/);
 ```
 
 Du solltest `Math.floor()` verwenden.
@@ -42,25 +42,25 @@ assert.match(attack.toString(), /Math\.random/);
 Du solltest `Math.random()` mit dem Wert `xp` multiplizieren.
 
 ```js
-assert.match(attack.toString(), /Math\.random\(\)\s*\*\s*xp/);
+assert.match(attack.toString(), /Math\.random\(\s*\)\s*\*\s*xp/);
 ```
 
 Du solltest `Math.floor()` verwenden, um das Ergebnis von `Math.random() * xp` abzurunden.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\)\s*\*\s*xp\s*.*\)/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*.*\)/);
 ```
 
 Du solltest `1` zum Ergebnis von `Math.floor()` hinzufügen.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 Du solltest das Ergebnis von `Math.floor(Math.random() * xp) + 1` zum Ergebnis von `weapons[currentWeapon].power` hinzufügen.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
index 2158e59b56a..550d6811ab0 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ed36d7a7915dfa444ba2
-title: Schritt 123
+title: Step 122
 challengeType: 0
-dashedName: step-123
+dashedName: step-122
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
index 7dd5840b26b..bcf89546757 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8edd05e27cc668051686f
-title: Schritt 124
+title: Step 123
 challengeType: 0
-dashedName: step-124
+dashedName: step-123
 ---
 
 # --description--
@@ -20,13 +20,13 @@ assert.match(attack.toString(), /if/);
 Deine `if`-Anweisung sollte überprüfen, ob `health` kleiner oder gleich `0` ist.
 
 ```js
-assert.match(attack.toString(), /if\s*\(health\s*<=\s*0\)/);
+assert.match(attack.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 ```
 
 Deine `if`-Anweisung sollte die `lose`-Funktion aufrufen.
 
 ```js
-assert.match(attack.toString(), /lose\(\)/);
+assert.match(attack.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
index e5b4beaa8e1..d786d3c7008 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee154c8946678775c4a4
-title: Schritt 125
+title: Step 124
 challengeType: 0
-dashedName: step-125
+dashedName: step-124
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
index 461ef88825b..0d5f2471d34 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee71f018e968a056d369
-title: Schritt 126
+title: Step 125
 challengeType: 0
-dashedName: step-126
+dashedName: step-125
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(code, /function\s+defeatMonster/);
 `defeatMonster` sollte eine leere Funktion sein.
 
 ```js
-assert.match(defeatMonster.toString(), /defeatMonster\s*\(\)\s*\{\s*\}/);
+assert.match(defeatMonster.toString(), /defeatMonster\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 Du solltest das `function`-Schlüsselwort verwenden, um `lose` zu deklarieren.
@@ -32,7 +32,7 @@ assert.match(code, /function\s+lose/);
 `lose` sollte eine leere Funktion sein.
 
 ```js
-assert.match(lose.toString(), /lose\s*\(\)\s*\{\s*\}/);
+assert.match(lose.toString(), /lose\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
index 49c6dce1953..84217f88c62 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8eec45f77bc69e8775294
-title: Schritt 127
+title: Step 126
 challengeType: 0
-dashedName: step-127
+dashedName: step-126
 ---
 
 # --description--
 
-Inside the `dodge` function, set `text.innerText` equal to the string `You dodge the attack from the <monster>`. Replace `<monster>` with the name of the monster, using the `name` property.
+Inside the `dodge` function, set `text.innerText` equal to the string `"You dodge the attack from the <monster>"`. Replace `<monster>` with the name of the monster, using the `name` property.
 
 # --hints--
 
-Du solltest der `text.innerText`-Eigenschaft den String `You dodge the attack from the` zuweisen. Denke daran, dass Abstände wichtig sind.
+You should assign the string `"You dodge the attack from the "` to the `text.innerText` property. Denke daran, dass Abstände wichtig sind.
 
 ```js
 assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1/);
@@ -20,7 +20,7 @@ assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack
 Du solltest den Verkettungsoperator verwenden, um den Namen des Monsters am Ende deines Strings hinzuzufügen. You can get this with `monsters[fighting].name`.
 
 ```js
-assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
index d9302e8b072..4b178fb3ccb 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8eefe2e68b66ac563816b
-title: Schritt 128
+title: Step 127
 challengeType: 0
-dashedName: step-128
+dashedName: step-127
 ---
 
 # --description--
 
-Setze in deiner `defeatMonster`-Funktion `gold` gleich `gold` plus das Level des Monsters mal `6.7`. Du kannst das Level des Monsters mit der `level`-Eigenschaft erhalten.
+Setze in deiner `defeatMonster`-Funktion `gold` gleich `gold` plus das Level des Monsters mal `6.7`. Remember you can get the monster's level by using `monsters[fighting].level`.
 
 Hier ist ein Beispiel für das Setzen von `num` auf `num` plus `5` * `8`: `num += 5 * 8`. Verwende `Math.floor()`, um das Ergebnis abzurunden.
 
@@ -22,13 +22,13 @@ assert.match(defeatMonster.toString(), /gold\s*\+=/);
 Du solltest `Math.floor()` verwenden, um das Resultat des Monster-Levels mal `6.7` zu runden.
 
 ```js
-assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\))/);
 ```
 
 You should add the result of `Math.floor(monsters[fighting].level * 6.7)` to `gold`.
 
 ```js
-assert.match(defeatMonster.toString(), /gold\s*\+=\s*(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /gold\s*\+=\s*((Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)))/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
index 6179bd75b50..23739bbbea0 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef6a52292f6bdca4f6f8
-title: Step 129
+title: Step 128
 challengeType: 0
-dashedName: step-129
+dashedName: step-128
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /xp\s*\+=/);
 Du solltest das Level des Monsters zu `xp` hinzufügen.
 
 ```js
-assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\[fighting\]\.level/);
+assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
index 76d0cead2d1..e11da556e45 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef8f0c76a46cd221a68c
-title: Schritt 130
+title: Step 129
 challengeType: 0
-dashedName: step-130
+dashedName: step-129
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
index 875a5d5dea4..df5eb6bb752 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8efb0e3ce826db8daf80f
-title: Schritt 131
+title: Step 130
 challengeType: 0
-dashedName: step-131
+dashedName: step-130
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /update/);
 Du solltest `locations[4]` als Argument übergeben.
 
 ```js
-assert.match(defeatMonster.toString(), /update\(locations\[4\]\)/);
+assert.match(defeatMonster.toString(), /update\(\s*locations\s*\[\s*4\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
index e5d85fff4d2..5f1211fc49a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8eff21c0b0f6ebe5b8e38
-title: Schritt 132
+title: Step 131
 challengeType: 0
-dashedName: step-132
+dashedName: step-131
 ---
 
 # --description--
 
 Dein `locations`-Array verfügt über kein fünftes Element, weshalb `locations[4]` nicht funktioniert.
 
-Füge ein neues Objekt am Ende des `locations`-Arrays hinzu, das die gleiche Struktur wie die anderen Objekte einhält. Setze `name` auf `kill monster`, setze `button text` auf ein Array mit drei `Go to town square`-Strings, setze `button functions` auf ein Array mit drei `goTown`-Variablen und setze `text` auf `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Füge ein neues Objekt am Ende des `locations`-Arrays hinzu, das die gleiche Struktur wie die anderen Objekte einhält. Set `name` to `"kill monster"`, set `"button text"` to an array with three `"Go to town square"` strings, set `"button functions"` to an array with three `goTown` variables, and set `text` to `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 # --hints--
 
@@ -25,25 +25,25 @@ Dein fünfter `locations`-Wert sollte ein Objekt sein.
 assert.isObject(locations[4]);
 ```
 
-Dein fünfter `locations`-Wert sollte eine `name`-Eigenschaft mit dem Wert `kill monster` haben.
+Your fifth `locations` value should have a `name` property with the value `"kill monster"`.
 
 ```js
 assert.equal(locations[4].name, 'kill monster');
 ```
 
-Dein fünfter `locations`-Wert sollte eine `button text`-Array mit drei `Go to town square`-Strings haben.
+Your fifth `locations` value should have a `"button text"` array with three `"Go to town square"` strings.
 
 ```js
 assert.deepEqual(locations[4]["button text"], ['Go to town square', 'Go to town square', 'Go to town square']);
 ```
 
-Dein fünfter `locations`-Wert sollte ein `button functions`-Array mit drei `goTown`-Variablen haben.
+Your fifth `locations` value should have a `"button functions"` array with three `goTown` variables.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, goTown]);
 ```
 
-Dein fünfter `locations`-Wert sollte eine `text`-Eigenschaft mit dem Wert `The monster screams Arg! as it dies. You gain experience points and find gold.` haben.
+Your fifth `locations` value should have a `text` property with the value `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams Arg! as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
index 6311914ccf5..fcb38f446f1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8f06fb318666fef69f91e
-title: Schritt 133
+title: Step 132
 challengeType: 0
-dashedName: step-133
+dashedName: step-132
 ---
 
 # --description--
 
-Das Wort `Arg!` sollte in Anführungszeichen gesetzt werden. Neben dem Auslassen von Anführungszeichen gibt es eine weitere Möglichkeit, Anführungszeichen in einen String einzufügen.
+The word `"Arg!"` should have quotes around it. Neben dem Auslassen von Anführungszeichen gibt es eine weitere Möglichkeit, Anführungszeichen in einen String einzufügen.
 
-Wandle die doppelten Anführungszeichen um den String `The monster screams Arg! as it dies. You gain experience points and find gold.` in einfache Anführungszeichen `'` um und füge dann doppelte Anführungszeichen um `Arg!` herum hinzu.
+Change the double quotes around the string `"The monster screams Arg! as it dies. You gain experience points and find gold."` to single quotes `'`, then add double quotes around `"Arg!"`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ Du solltest einfache Anführungszeichen um den String herum setzen.
 assert.match(code, /'The monster screams "?Arg!"? as it dies. You gain experience points and find gold.'/);
 ```
 
-Du solltest doppelte Anführungszeichen um `Arg!` herum setzen.
+You should use double quotes around `"Arg!"`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams "Arg!" as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
index 9e2d9d6a1af..d82d816e46c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f14fe6d1fc72454648c7
-title: Schritt 134
+title: Step 133
 challengeType: 0
-dashedName: step-134
+dashedName: step-133
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
index 2c57fd61485..c4a59665e51 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f1d5f5ddbf74c07f733b
-title: Schritt 135
+title: Step 134
 challengeType: 0
-dashedName: step-135
+dashedName: step-134
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(lose.toString(), /update\(/);
 Your `update` function should have `locations[5]` for the argument.
 
 ```js
-assert.match(lose.toString(), /update\(locations\[5\]\)/);
+assert.match(lose.toString(), /update\(\s*locations\s*\[\s*5\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
index 84b4866b00b..94dd06e929b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f20463b324759953edad
-title: Schritt 136
+title: Step 135
 challengeType: 0
-dashedName: step-136
+dashedName: step-135
 ---
 
 # --description--
@@ -45,7 +45,7 @@ Deine `restart`-Funktion sollte `currentWeapon` auf `0` setzen.
 assert.match(restart.toString(), /currentWeapon\s*=\s*0/);
 ```
 
-Deine `restart`-Funktion sollte `inventory` auf ein Array mit dem String `stick` setzen.
+Your `restart` function should set `inventory` to an array with the string `"stick"`.
 
 ```js
 assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
@@ -54,7 +54,7 @@ assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
 Deine `restart`-Funktion sollte die `goTown()`-Funktion aufrufen.
 
 ```js
-assert.match(restart.toString(), /goTown\(\)/);
+assert.match(restart.toString(), /goTown\(\s*\)/);
 ```
 
 Du solltest `goldText.innerText` auf den Wert `gold` setzen.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
index c17c4cae8bf..2208e40eec0 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f256b813a476cae51f49
-title: Schritt 138
+title: Step 137
 challengeType: 0
-dashedName: step-138
+dashedName: step-137
 ---
 
 # --description--
@@ -41,7 +41,7 @@ Du solltest die `winGame`-Funktion in deinem `if`-Block aufrufen.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\)(\s*\})?/);
+assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\s*\)(\s*\})?/);
 ```
 
 Du solltest einen `else`-Block hinzufügen.
@@ -55,7 +55,7 @@ Dein `else`-Block sollte die `defeatMonster`-Funktion aufrufen.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\)(\s*\})?/);
+assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\s*\)(\s*\})?/);
 ```
 
 # --seed--
@@ -220,7 +220,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
index 57fe001f302..69e82c87967 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
@@ -1,6 +1,6 @@
 ---
 id: 62a8f35bde1750791f58773f
-title: Schritt 139
+title: Step 139
 challengeType: 0
 dashedName: step-139
 ---
@@ -20,7 +20,7 @@ assert.match(code, /function\s+winGame/);
 Your `winGame` function should call the `update` function and pass in `locations[6]`.
 
 ```js
-assert.match(winGame.toString(), /update\s*\(\s*locations\[6\]\s*\)/);
+assert.match(winGame.toString(), /update\s*\(\s*locations\s*\[\s*6\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -185,7 +185,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
index 7f3e77794a5..90508f0a29e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
@@ -1,13 +1,13 @@
 ---
 id: 62a94114ce0b8918b487390f
-title: Schritt 140
+title: Step 140
 challengeType: 0
 dashedName: step-140
 ---
 
 # --description--
 
-Füge ein weiteres Objekt im `locations`-Array hinzu. Alles sollte wie beim `lose`-Objekt sein, außer der `name` sollte `win` und der `text` sollte `You defeat the dragon! YOU WIN THE GAME! 🎉` sein.
+Füge ein weiteres Objekt im `locations`-Array hinzu. Everything should be the same as the `lose` object, except the `name` should be `"win"` and the `text` should be `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 # --hints--
 
@@ -23,13 +23,13 @@ Dein siebter `locations`-Wert sollte ein Objekt sein.
 assert.isObject(locations[6]);
 ```
 
-Dein siebter `locations`-Wert sollte eine `name`-Eigenschaft mit dem Wert `win` haben.
+Your seventh `locations` value should have a `name` property with the value `"win"`.
 
 ```js
 assert.equal(locations[6].name, 'win');
 ```
 
-Dein siebter `locations`-Wert sollte ein `button text`-Array mit drei `REPLAY?`-Strings haben.
+Your seventh `locations` value should have a `button text` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[6]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
@@ -41,10 +41,10 @@ Dein siebter `locations`-Wert sollte ein `button functions`-Array mit drei `rest
 assert.deepEqual(locations[6]["button functions"], [restart, restart, restart]);
 ```
 
-Dein siebter `locations`-Wert sollte eine `text`-Eigenschaft mit dem Wert `You defeat the dragon! YOU WIN THE GAME! 🎉` haben.
+Your seventh `locations` value should have a `text` property with the value `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 ```js
-assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! 🎉');
+assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! &#x1F389;');
 ```
 
 # --seed--
@@ -210,7 +210,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 --fcc-editable-region--
 ];
@@ -228,7 +228,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
index bc3bf85e922..b7bad4b4074 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1cea594f152ba626b872
-title: Schritt 141
+title: Step 141
 challengeType: 0
 dashedName: step-141
 ---
@@ -16,7 +16,7 @@ Inside your `attack` function, change your `health -= monsters[fighting].level;`
 You should update your `health` line to be `health -= getMonsterAttackValue(monsters[fighting].level);`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(monsters\[fighting\]\.level\)/);
+assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)/);
 ```
 
 # --seed--
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -204,7 +204,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
index 9aa2a5cc6fa..29e254a2fff 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1d6736ba262cfa74344b
-title: Schritt 142
+title: Step 142
 challengeType: 0
 dashedName: step-142
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
index 927f3f05a09..ab384642de3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1d9f535e102e4663e7a6
-title: Schritt 143
+title: Step 143
 challengeType: 0
 dashedName: step-143
 ---
@@ -22,13 +22,13 @@ assert.match(code, /const\s+hit/);
 Du solltest die Gleichung `(level * 5) - (Math.floor(Math.random() * xp))` verwenden.
 
 ```js
-assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(Math\.random\(\)\s*\*\s*xp\))/);
+assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\))/);
 ```
 
 Du solltest `hit` auf den Wert von `(level * 5) - (Math.floor(Math.random() * xp))` einstellen.
 
 ```js
-assert.match(code, /hit\s*=\s*\(level\s*\*\s*5\)\s*-\s*\(Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\)/);
+assert.match(code, /hit\s*=\s*\(\s*level\s*\*\s*5\s*\)\s*-\s*\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
index 4bf7e4c6f55..1ac1b564f17 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1e3c7c3d552fb04f0f18
-title: Schritt 144
+title: Step 144
 challengeType: 0
 dashedName: step-144
 ---
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
index 1e458b57d92..4258cf8fd54 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1e8ccd579330e097ce44
-title: Schritt 145
+title: Step 145
 challengeType: 0
 dashedName: step-145
 ---
@@ -188,13 +188,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -211,7 +211,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
index 01d1dde478b..b80646466f0 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1eec891ed731db227a36
-title: Schritt 146
+title: Step 146
 challengeType: 0
 dashedName: step-146
 ---
@@ -207,13 +207,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -230,7 +230,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
index 6a65233c834..351dab64559 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1fed3d4e873366ff3131
-title: Schritt 147
+title: Step 147
 challengeType: 0
 dashedName: step-147
 ---
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
index 854a048a3b2..8ac903940a1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa204c1e1d33348ff09944
-title: Schritt 148
+title: Step 148
 challengeType: 0
 dashedName: step-148
 ---
@@ -14,7 +14,7 @@ Move your `monsterHealth` assignment into your `if` block.
 You should move your `monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1` into your `if` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1/)
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
index 10d0620a16a..0f1429cf2ad 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
@@ -1,26 +1,26 @@
 ---
 id: 62aa20e9cf1be9358f5aceae
-title: Schritt 149
+title: Step 149
 challengeType: 0
 dashedName: step-149
 ---
 
 # --description--
 
-Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `You miss.` to the end of `text.innerText`.
+Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `" You miss."` to the end of `text.innerText`.
 
 # --hints--
 
 You should add an `else` block after your `if (isMonsterHit())` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else/)
 ```
 
-You should add the text `You miss.` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
+You should add the text `" You miss."` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
index d1a94336bca..d416bbb7431 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2136fc49b836dfedb959
-title: Schritt 150
+title: Step 150
 challengeType: 0
 dashedName: step-150
 ---
@@ -20,7 +20,7 @@ assert.match(code, /function\s+isMonsterHit/);
 Your `isMonsterHit` function should return the result of the comparison `Math.random() > .2`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2/);
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
index e777ac9be99..2203778e98c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa21971e3b743844849985
-title: Schritt 151
+title: Step 151
 challengeType: 0
 dashedName: step-151
 ---
@@ -32,7 +32,7 @@ assert.match(isMonsterHit.toString(), /\|\|\s*health\s*<\s*20/);
 Your function should return the result of the comparison `Math.random() > .2` **or** `health < 20`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
 ```
 
 # --seed--
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
index 12921250c6a..13ad577157a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa21ea8d9d9f396b95dd87
-title: Schritt 152
+title: Step 152
 challengeType: 0
 dashedName: step-152
 ---
@@ -21,7 +21,7 @@ assert.lengthOf(ifs, 5);
 Your new `if` statement should check `Math.random() <= .1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\)\s*<=\s*0?\.1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*<=\s*0?\.1\s*\)/);
 ```
 
 # --seed--
@@ -186,13 +186,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -209,7 +209,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
index c12b8297551..75e7e7fdc67 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa226207f33d3ad4c6f546
-title: Schritt 153
+title: Step 153
 challengeType: 0
 dashedName: step-153
 ---
 
 # --description--
 
-Use the `+=` operator to add `Your <weapon> breaks.`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
+Use the `+=` operator to add `" Your <weapon> breaks."`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
 
 # --hints--
 
@@ -21,7 +21,7 @@ assert.lengthOf(concat, 3);
 You should use the `pop` method on the `inventory` array.
 
 ```js
-assert.match(attack.toString(), /inventory\.pop\(\)/);
+assert.match(attack.toString(), /inventory\.pop\(\s*\)/);
 ```
 
 You should add `Your`, with a space before and after it, to `text.innerText`.
@@ -30,17 +30,16 @@ You should add `Your`, with a space before and after it, to `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1/);
 ```
 
-You should add the return value of `inventory.pop()` to the `Your` string.
+You should add the return value of `inventory.pop()` to the `" Your "` string.
 
 ```js
-console.log(attack.toString());
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)/);
 ```
 
-You should add `breaks.`, with a space in front of it, to the end of your string.
+You should add `" breaks."`, with a space in front of it, to the end of your string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)\s*\+\s*('|")\sbreaks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)\s*\+\s*('|")\sbreaks\.\2/);
 ```
 
 # --seed--
@@ -205,13 +204,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -228,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
index c4052bb2b1b..cb4f98370a3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
@@ -1,13 +1,19 @@
 ---
 id: 62aa22aba186563bcbf2c395
-title: Schritt 154
+title: Step 154
 challengeType: 0
 dashedName: step-154
 ---
 
 # --description--
 
-Remember that the increment operator `++` can be used to increase a variable's value by 1. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by 1.
+Remember that the increment operator `++` can be used to increase a variable's value by `1`. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by `1`. For example :
+
+```js
+let num = 10;
+num--;
+console.log(num); // Output: 9
+```
 
 Decrement the value of `currentWeapon` in your `if` statement, after you update the text.
 
@@ -187,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -210,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
index ffa68600750..0ef5f95386f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa234322d4ad3e8bce42cc
-title: Schritt 155
+title: Step 155
 challengeType: 0
 dashedName: step-155
 ---
@@ -24,19 +24,19 @@ if (firstName === "Quincy" && lastName === "Larson") {
 Du solltest deine bestehende `if`-Anweisung nicht ändern.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1/);
 ```
 
 Du solltest den logischen UND-Operator `&&` verwenden.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&/);
 ```
 
 You should use the logical AND operator to check if `inventory.length` does not equal `1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
 ```
 
 # --seed--
@@ -201,13 +201,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
index 129d05dfcd7..3320abac13c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2469c77b363fdb4f0e06
-title: Schritt 156
+title: Step 156
 challengeType: 0
 dashedName: step-156
 ---
@@ -28,7 +28,7 @@ assert.match(easterEgg.toString(), /update\(/);
 `easterEgg` should call the `update` function with `locations[7]` as the argument.
 
 ```js
-assert.match(easterEgg.toString(), /update\(\s*locations\[7\]\s*\)/);
+assert.match(easterEgg.toString(), /update\(\s*locations\s*\[\s*7\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
index a188f17999f..bc5c75fdb1e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa252c3b1073415ba2b898
-title: Schritt 157
+title: Step 157
 challengeType: 0
 dashedName: step-157
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
index e065852e128..4b231fe27f9 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa258da314ef42ba0a1858
-title: Schritt 158
+title: Step 158
 challengeType: 0
 dashedName: step-158
 ---
@@ -211,13 +211,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -234,7 +234,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
index 81f182584f2..a23fc699060 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa25fcb5837d43b4d9873d
-title: Schritt 159
+title: Step 159
 challengeType: 0
 dashedName: step-159
 ---
 
 # --description--
 
-Add another object to your `locations` array. Set `name` to `easter egg`, set `button text` to an array with the strings `2`, `8`, and `Go to town square?`, set `button functions` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Add another object to your `locations` array. Set `name` to `"easter egg"`, set `"button text"` to an array with the strings `"2"`, `"8"`, and `"Go to town square?"`, set `"button functions"` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 # --hints--
 
@@ -23,25 +23,25 @@ Dein achter `locations`-Wert sollte ein Objekt sein.
 assert.isObject(locations[7]);
 ```
 
-Dein achter `locations`-Wert sollte eine `name`-Eigenschaft mit dem Wert `easter egg` haben.
+Your eighth `locations` value should have a `name` property with the value `"easter egg"`.
 
 ```js
 assert.equal(locations[7].name, "easter egg");
 ```
 
-Your eighth `locations` value should have a `button text` array with the strings `2`, `8`, and `Go to town square?`.
+Your eighth `locations` value should have a `"button text"` array with the strings `"2"`, `"8"`, and `"Go to town square?"`.
 
 ```js
 assert.deepEqual(locations[7]["button text"], ["2", "8", "Go to town square?"]);
 ```
 
-Your eighth `locations` value should have a `button functions` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
+Your eighth `locations` value should have a `"button functions"` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[7]["button functions"], [pickTwo, pickEight, goTown]);
 ```
 
-Your eighth `locations` value should have a `text` property with the value `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Your eighth `locations` value should have a `text` property with the value `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 ```js
 assert.equal(locations[7].text, "You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!");
@@ -209,13 +209,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
 --fcc-editable-region--
 
@@ -235,7 +235,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
index 08fe81797a3..144e384890e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2626c3c10244b94c787b
-title: Schritt 160
+title: Step 160
 challengeType: 0
 dashedName: step-160
 ---
@@ -14,7 +14,7 @@ Inside `pick`, use `const` to initialize a variable named `numbers` and set it t
 Your `pick` function should initialize `numbers` to an empty array `[]`.
 
 ```js
-assert.match(pick.toString(), /numbers\s*=\s*\[\]/);
+assert.match(pick.toString(), /numbers\s*=\s*\[\s*\]/);
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
index b2a4312f6b6..690b9c4efd5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa264d23cdaa45a20efada
-title: Schritt 161
+title: Step 161
 challengeType: 0
 dashedName: step-161
 ---
@@ -195,13 +195,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
index a407d409859..78953c02cbc 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa26cca3cd3d46c431e73b
-title: Schritt 162
+title: Step 162
 challengeType: 0
 dashedName: step-162
 ---
@@ -20,13 +20,13 @@ assert.match(pick.toString(), /numbers\.push\(/);
 Du solltest `Math.floor(Math.random() * 11)` verwenden, um die Zufallszahl zu erzeugen.
 
 ```js
-assert.match(pick.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)/);
+assert.match(pick.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)/);
 ```
 
 You should `push` the result of `Math.floor(Math.random() * 11)` to the end of the `numbers` array.
 
 ```js
-assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)\s*\)/);
+assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
index a4550f81e07..50ee79091f1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
@@ -1,29 +1,29 @@
 ---
 id: 62aa27227399d647e1c37a3c
-title: Schritt 163
+title: Step 163
 challengeType: 0
 dashedName: step-163
 ---
 
 # --description--
 
-After the `while` loop, set `text.innerText` to equal `You picked <someGuess>. Here are the random numbers:`. Replace `<someGuess>` with the `guess` function parameter.
+After the `while` loop, set `text.innerText` to equal `"You picked <someGuess>. Here are the random numbers:"`. Replace `<someGuess>` with the `guess` function parameter.
 
 # --hints--
 
-You should set `text.innerText` to the string `You picked`. Remember that spacing matters.
+You should set `text.innerText` to the string `"You picked "`. Remember that spacing matters.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1/);
 ```
 
-You should use the concatenation operator to add the value of the `guess` parameter to your `You picked` string.
+You should use the concatenation operator to add the value of the `guess` parameter to your `"You picked "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess/);
 ```
 
-You should use the concatenation operator to add the string `. Here are the random numbers:` to your `"You picked " + guess` string.
+You should use the concatenation operator to add the string `". Here are the random numbers:"` to your `"You picked " + guess` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\2/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
index b2b1f9e3cb9..b5c0ff67275 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa27560def7048d7b4a095
-title: Schritt 164
+title: Step 164
 challengeType: 0
 dashedName: step-164
 ---
@@ -11,7 +11,7 @@ At the end of the string, before the final quote, insert the new line escape cha
 
 # --hints--
 
-You should add the new line escape character `\n` to your `. Here are the random numbers:` string.
+You should add the new line escape character `\n` to your `". Here are the random numbers: "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\\n\2/);
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
index 98566fdc886..bdd6dd0c4b3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa27c40ca6f04ab8be5fac
-title: Schritt 165
+title: Step 165
 challengeType: 0
 dashedName: step-165
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -214,7 +214,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
index a9bc9e9a386..57a0167a9f1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa28032d863d4bd8058799
-title: Schritt 166
+title: Step 166
 challengeType: 0
 dashedName: step-166
 ---
@@ -11,7 +11,7 @@ dashedName: step-166
 
 Der Initialisierungsausdruck wird nur einmal ausgeführt, bevor die Schleife beginnt, und wird häufig zur Definition und Einrichtung der Schleifenvariablen verwendet. Think of it like declaring a counter to use in your loop.
 
-Many `for` loops use `i` as the counter and start from 0, so change `let x = 1;` to `let i = 0;`.
+Many `for` loops use `i` as the counter and start from `0`, so change `let x = 1;` to `let i = 0;`.
 
 # --hints--
 
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
index 52b4471220e..82b517528b7 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa287434dc284cea01157c
-title: Schritt 167
+title: Step 167
 challengeType: 0
 dashedName: step-167
 ---
@@ -9,7 +9,7 @@ dashedName: step-167
 
 The second statement in a `for` loop, the condition statement, is evaluated at the beginning of every loop iteration. The loop will continue as long as the condition evaluates to be true.
 
-Wir wollen, dass die Schleife 10 Mal läuft, also ändern wir `x < 5` zu `i < 10`.
+We want the loop to run `10` times, so change `x < 5` to `i < 10`.
 
 # --hints--
 
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
index 1872571ad1f..d87e5e62858 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa28bbd6323e4dfb3ac43e
-title: Schritt 168
+title: Step 168
 challengeType: 0
 dashedName: step-168
 ---
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
index ea153c90a34..cb5189b5873 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa28fb651bf14efa2dbb16
-title: Schritt 169
+title: Step 169
 challengeType: 0
 dashedName: step-169
 ---
@@ -20,20 +20,19 @@ assert.match(pick.toString(), /text\.innerText\s*\+=/);
 Für den Zugriff auf `numbers[i]` solltest du die Klammerschreibweise verwenden.
 
 ```js
-assert.match(pick.toString(), /numbers\[i\]/);
+assert.match(pick.toString(), /numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add `numbers[i]` to your `text.innerText` value.
 
 ```js
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add a new-line character after the `numbers[i]` value. Denke daran, dass du dies mit `\n` tun kannst.
 
 ```js
-console.log(pick.toString());
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]\s*\+\s*('|")\\n\1/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]\s*\+\s*('|")\\n\1/);
 ```
 
 # --seed--
@@ -198,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
index d0003aa71bf..5d2de454974 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2943669c9d5026af6985
-title: Schritt 170
+title: Step 170
 challengeType: 0
 dashedName: step-170
 ---
@@ -198,13 +198,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
index 46fa02e246c..659e9a1e4b1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
@@ -1,17 +1,17 @@
 ---
 id: 62aa2999ec27ec516655eba6
-title: Schritt 171
+title: Step 171
 challengeType: 0
 dashedName: step-171
 ---
 
 # --description--
 
-Inside the `if` statement, add the string `Right! You win 20 gold!` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
+Inside the `if` statement, add the string `"Right! You win 20 gold!"` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
 
 # --hints--
 
-You should use compound assignment to add the string `Right! You win 20 gold!` to the end of `text.innerText`.
+You should use compound assignment to add the string `"Right! You win 20 gold!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Right! You win 20 gold!\1/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
index 7b3aa8ba68e..b0868a55bf0 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa29d8f8f88152c91350ca
-title: Schritt 172
+title: Step 172
 challengeType: 0
 dashedName: step-172
 ---
 
 # --description--
 
-Now add an `else` statement. Inside, add `Wrong! You lose 10 health!` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
+Now add an `else` statement. Inside, add `"Wrong! You lose 10 health!"` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should add an `else` block.
 assert.match(pick.toString(), /else\s*\{/);
 ```
 
-Your `else` block should use compound assignment to add `Wrong! You lose 10 health!` to the end of `text.innerText`.
+Your `else` block should use compound assignment to add `"Wrong! You lose 10 health!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Wrong! You lose 10 health!\1/);
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -226,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
index 09d2d383351..650fe59ddd1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2aec2f09d454253aad6c
-title: Schritt 173
+title: Step 173
 challengeType: 0
 dashedName: step-173
 ---
@@ -27,7 +27,7 @@ assert.match(pick.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 Your `if` statement should call the `lose` function.
 
 ```js
-assert.match(pick.toString(), /lose\(\)/);
+assert.match(pick.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
@@ -192,13 +192,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -221,7 +221,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
index f913f5aada6..ebf70ca3d06 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
@@ -1,19 +1,19 @@
 ---
 id: 62aa2ba9cd881355a6f0a5a8
-title: Schritt 174
+title: Step 174
 challengeType: 0
 dashedName: step-174
 ---
 
 # --description--
 
-Looking at your `kill monster` object, `button functions` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `button text`.
+Looking at your `"kill monster"` object, `"button functions"` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `"button text"`.
 
 With this, your RPG game is complete! You can now play around - can you defeat the dragon?
 
 # --hints--
 
-You should update your fifth `locations` object to have a `button functions` property of `[goTown, goTown, easterEgg]`.
+You should update your fifth `locations` object to have a `"button functions"` property of `[goTown, goTown, easterEgg]`.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, easterEgg]);
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
@@ -557,13 +557,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
index d2ca3e6132d..4a096896d78 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
@@ -1,13 +1,13 @@
 ---
 id: 62ba17beef16c563069a65d8
-title: Schritt 137
+title: Step 136
 challengeType: 0
-dashedName: step-137
+dashedName: step-136
 ---
 
 # --description--
 
-Füge dem `locations`-Bereich am Ende ein weiteres Objekt hinzu. Set the `name` property to `lose`, set `button text` to an array with three `REPLAY?` strings, set `button functions` to an array with three `restart` variables, and set `text` to `You die. ☠️`. Du kannst diesen Text kopieren, um das Emote zu verwenden.
+Füge dem `locations`-Bereich am Ende ein weiteres Objekt hinzu. Set the `name` property to `"lose"`, set `"button text"` to an array with three `"REPLAY?"` strings, set `"button functions"` to an array with three `restart` variables, and set `text` to `"You die. &#x2620;"`.
 
 # --hints--
 
@@ -23,28 +23,28 @@ Dein sechster `locations`-Wert sollte ein Objekt sein.
 assert.isObject(locations[5]);
 ```
 
-Your sixth `locations` value should have a `name` property with the value `lose`.
+Your sixth `locations` value should have a `name` property with the value `"lose"`.
 
 ```js
 assert.equal(locations[5].name, 'lose');
 ```
 
-Your sixth `locations` value should have a `button text` array with three `REPLAY?` strings.
+Your sixth `locations` value should have a `"button text"` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[5]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
 ```
 
-Your sixth `locations` value should have a `button functions` array with three `restart` variables.
+Your sixth `locations` value should have a `"button functions"` array with three `restart` variables.
 
 ```js
 assert.deepEqual(locations[5]["button functions"], [restart, restart, restart]);
 ```
 
-Your sixth `locations` value should have a `text` property with the value `You die. ☠️`.
+Your sixth `locations` value should have a `text` property with the value `"You die. &#x2620;"`.
 
 ```js
-assert.equal(locations[5].text, 'You die. ☠️');
+assert.equal(locations[5].text, 'You die. &#x2620;');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
index 46389bdd636..f826fccc0a3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
@@ -17,7 +17,7 @@ You should declare a `button2` variable with `const`.
 assert.match(code, /const\s+button2/);
 ```
 
-Your `button2` variable should have the value of your `#button2` element.
+Your `button2` variable should have the value of your `"#button2"` element.
 
 ```js
 assert.deepEqual(button2, document.querySelector('#button2'));
@@ -29,7 +29,7 @@ You should declare a `button3` variable with `const`.
 assert.match(code, /const\s+button3/);
 ```
 
-Your `button3` variable should have the value of your `#button3` element.
+Your `button3` variable should have the value of your `"#button3"` element.
 
 ```js
 assert.deepEqual(button3, document.querySelector('#button3'));
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
new file mode 100644
index 00000000000..432c7be3420
--- /dev/null
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
@@ -0,0 +1,356 @@
+---
+id: 65b2f6acce65b7a69751a090
+title: Step 138
+challengeType: 0
+dashedName: step-138
+---
+
+# --description--
+
+In order for the `&#x2620;` emoticon text to properly display on the page, you will need to use the <dfn>innerHTML</dfn> property.
+
+The `innerHTML` property allows you to access or modify the content inside an HTML element using JavaScript.
+
+Here is an example of updating the content for this paragraph element using the `innerHTML`  property.
+
+```html
+<p id="demo">This is a paragraph.</p>
+```
+
+```js
+document.querySelector("#demo").innerHTML = "Hello, innerHTML!";
+```
+
+In the `update` function, change `text.innerText` to `text.innerHTML`.
+
+# --hints--
+
+
+You should use dot notation to access the `innerHTML` property of `text`.
+
+```js
+assert.match(code, /text\.innerHTML/);
+```
+
+You should not use `let` or `const` to access the `innerHTML` property of `text`.
+
+```js
+assert.notMatch(code, /(let|const)\s+text.innerHTML/);
+```
+
+You should set `innerHTML` equal to the `text` property of `location`.
+
+```js
+assert.match(code, /text\.innerHTML\s*=\s*location\.text/);
+```
+
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <link rel="stylesheet" href="./styles.css">
+    <title>RPG - Dragon Repeller</title>
+  </head>
+  <body>
+    <div id="game">
+      <div id="stats">
+        <span class="stat">XP: <strong><span id="xpText">0</span></strong></span>
+        <span class="stat">Health: <strong><span id="healthText">100</span></strong></span>
+        <span class="stat">Gold: <strong><span id="goldText">50</span></strong></span>
+      </div>
+      <div id="controls">
+        <button id="button1">Go to store</button>
+        <button id="button2">Go to cave</button>
+        <button id="button3">Fight dragon</button>
+      </div>
+      <div id="monsterStats">
+        <span class="stat">Monster Name: <strong><span id="monsterName"></span></strong></span>
+        <span class="stat">Health: <strong><span id="monsterHealth"></span></strong></span>
+      </div>
+      <div id="text">
+        Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.
+      </div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+body {
+  background-color: #0a0a23;
+}
+
+#text {
+  background-color: #0a0a23;
+  color: #ffffff;
+  padding: 10px;
+}
+
+#game {
+  max-width: 500px;
+  max-height: 400px;
+  background-color: #ffffff;
+  color: #ffffff;
+  margin: 30px auto 0px;
+  padding: 10px;
+}
+
+#controls,
+#stats {
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #0a0a23;
+}
+
+#monsterStats {
+  display: none;
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #ffffff;
+  background-color: #c70d0d;
+}
+
+.stat {
+  padding-right: 10px;
+}
+
+button {
+  cursor: pointer;
+  color: #0a0a23;
+  background-color: #feac32;
+  background-image: linear-gradient(#fecc4c, #ffac33);
+  border: 3px solid #feac32;
+}
+```
+
+```js
+let xp = 0;
+let health = 100;
+let gold = 50;
+let currentWeapon = 0;
+let fighting;
+let monsterHealth;
+let inventory = ["stick"];
+
+const button1 = document.querySelector('#button1');
+const button2 = document.querySelector("#button2");
+const button3 = document.querySelector("#button3");
+const text = document.querySelector("#text");
+const xpText = document.querySelector("#xpText");
+const healthText = document.querySelector("#healthText");
+const goldText = document.querySelector("#goldText");
+const monsterStats = document.querySelector("#monsterStats");
+const monsterName = document.querySelector("#monsterName");
+const monsterHealthText = document.querySelector("#monsterHealth");
+const weapons = [
+  { name: 'stick', power: 5 },
+  { name: 'dagger', power: 30 },
+  { name: 'claw hammer', power: 50 },
+  { name: 'sword', power: 100 }
+];
+const monsters = [
+  {
+    name: "slime",
+    level: 2,
+    health: 15
+  },
+  {
+    name: "fanged beast",
+    level: 8,
+    health: 60
+  },
+  {
+    name: "dragon",
+    level: 20,
+    health: 300
+  }
+]
+const locations = [
+  {
+    name: "town square",
+    "button text": ["Go to store", "Go to cave", "Fight dragon"],
+    "button functions": [goStore, goCave, fightDragon],
+    text: "You are in the town square. You see a sign that says \"Store\"."
+  },
+  {
+    name: "store",
+    "button text": ["Buy 10 health (10 gold)", "Buy weapon (30 gold)", "Go to town square"],
+    "button functions": [buyHealth, buyWeapon, goTown],
+    text: "You enter the store."
+  },
+  {
+    name: "cave",
+    "button text": ["Fight slime", "Fight fanged beast", "Go to town square"],
+    "button functions": [fightSlime, fightBeast, goTown],
+    text: "You enter the cave. You see some monsters."
+  },
+  {
+    name: "fight",
+    "button text": ["Attack", "Dodge", "Run"],
+    "button functions": [attack, dodge, goTown],
+    text: "You are fighting a monster."
+  },
+  {
+    name: "kill monster",
+    "button text": ["Go to town square", "Go to town square", "Go to town square"],
+    "button functions": [goTown, goTown, goTown],
+    text: 'The monster screams "Arg!" as it dies. You gain experience points and find gold.'
+  },
+  {
+    name: "lose",
+    "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
+    "button functions": [restart, restart, restart],
+    text: "You die. &#x2620;"
+  }
+
+];
+
+// initialize buttons
+button1.onclick = goStore;
+button2.onclick = goCave;
+button3.onclick = fightDragon;
+
+function update(location) {
+  --fcc-editable-region--
+  monsterStats.style.display = "none";
+  button1.innerText = location["button text"][0];
+  button2.innerText = location["button text"][1];
+  button3.innerText = location["button text"][2];
+  button1.onclick = location["button functions"][0];
+  button2.onclick = location["button functions"][1];
+  button3.onclick = location["button functions"][2];
+  text.innerText = location.text;
+  --fcc-editable-region--
+}
+
+function goTown() {
+  update(locations[0]);
+}
+
+function goStore() {
+  update(locations[1]);
+}
+
+function goCave() {
+  update(locations[2]);
+}
+
+function buyHealth() {
+  if (gold >= 10) {
+    gold -= 10;
+    health += 10;
+    goldText.innerText = gold;
+    healthText.innerText = health;
+  } else {
+    text.innerText = "You do not have enough gold to buy health.";
+  }
+}
+
+function buyWeapon() {
+  if (currentWeapon < weapons.length - 1) {
+    if (gold >= 30) {
+      gold -= 30;
+      currentWeapon++;
+      goldText.innerText = gold;
+      let newWeapon = weapons[currentWeapon].name;
+      text.innerText = "You now have a " + newWeapon + ".";
+      inventory.push(newWeapon);
+      text.innerText += " In your inventory you have: " + inventory;
+    } else {
+      text.innerText = "You do not have enough gold to buy a weapon.";
+    }
+  } else {
+    text.innerText = "You already have the most powerful weapon!";
+    button2.innerText = "Sell weapon for 15 gold";
+    button2.onclick = sellWeapon;
+  }
+}
+
+function sellWeapon() {
+  if (inventory.length > 1) {
+    gold += 15;
+    goldText.innerText = gold;
+    let currentWeapon = inventory.shift();
+    text.innerText = "You sold a " + currentWeapon + ".";
+    text.innerText += " In your inventory you have: " + inventory;
+  } else {
+    text.innerText = "Don't sell your only weapon!";
+  }
+}
+
+function fightSlime() {
+  fighting = 0;
+  goFight();
+}
+
+function fightBeast() {
+  fighting = 1;
+  goFight();
+}
+
+function fightDragon() {
+  fighting = 2;
+  goFight();
+}
+
+function goFight() {
+  update(locations[3]);
+  monsterHealth = monsters[fighting].health;
+  monsterStats.style.display = "block";
+  monsterName.innerText = monsters[fighting].name;
+  monsterHealthText.innerText = monsterHealth;
+}
+
+function attack() {
+  text.innerText = "The " + monsters[fighting].name + " attacks.";
+  text.innerText += " You attack it with your " + weapons[currentWeapon].name + ".";
+  health -= monsters[fighting].level;
+  monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1;
+  healthText.innerText = health;
+  monsterHealthText.innerText = monsterHealth;
+   if (health <= 0) {
+    lose();
+  } else if (monsterHealth <= 0) {
+    if (fighting === 2) {
+      winGame();
+    } else {
+      defeatMonster();
+    }
+  }
+}
+
+function dodge() {
+  text.innerText = "You dodge the attack from the " + monsters[fighting].name;
+}
+
+function defeatMonster() {
+  gold += Math.floor(monsters[fighting].level * 6.7);
+  xp += monsters[fighting].level;
+  goldText.innerText = gold;
+  xpText.innerText = xp;
+  update(locations[4]);
+}
+
+function lose() {
+  update(locations[5]);
+}
+
+function restart() {
+  xp = 0;
+  health = 100;
+  gold = 50;
+  currentWeapon = 0;
+  inventory = ["stick"];
+  goldText.innerText = gold;
+  healthText.innerText = health;
+  xpText.innerText = xp;
+  goTown();
+}
+```
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
index d8dc00d7e1a..de34faf7919 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
@@ -22,21 +22,21 @@ Du solltest die Klammerschreibweise verwenden, um auf die Eigenschaft von `total
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 Du solltest den Zuweisungsoperator verwenden, um den Wert der Eigenschaft von `totalCountPerProduct` zu aktualisieren, die `dessert.id` entspricht.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=/);
 ```
 
 Du solltest den Wert von `totalCountPerProduct` auf den aktuellen Wert plus eins aktualisieren.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\+\s*1/);
 ```
 
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
index 474766e9c9d..07471f5842a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
@@ -17,28 +17,28 @@ You should wrap your right-hand `totalCountPerProduct[dessert.id]` in parenthese
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 Du solltest den `||`-Operator verwenden.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*/);
 ```
 
 Du solltest `0` als deinen Fallbackwert verwenden.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
 ```
 
 Du solltest weiterhin `1` zu dem Wert hinzufügen.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
index 6164a187a8d..1784e35ffe8 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
@@ -29,7 +29,7 @@ Du solltest den Wert von `totalCountPerProduct[product.id]` `currentProductCount
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\[product\.id\]/);
+assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\s*\[\s*product\.id\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
index fd7d2aaf140..ed3207f2ca8 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
@@ -32,7 +32,7 @@ assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*
 Du solltest dem Event-Listener eine leere Callback-Funktion hinzufügen. Denke daran, ihr einen `event`-Parameter zuzuweisen.
 
 ```js
-assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*\s*\}\s*\)/);
+assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*;?\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
index bd7751293f7..4d36858b1cc 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
@@ -53,7 +53,7 @@ Dein `reduce`-Callback sollte einen Ausgangswert von `0` haben.
 
 ```js
 const afterCalculateTotal = code.split('calculateTotal')[1];
-assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(total,\s*item\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
+assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(\s*total,\s*item\s*\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
index 4c7510e19e6..9e09d8c78bd 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
@@ -37,7 +37,6 @@ assert.match(afterCalculateTaxes, /amount\s*\*\s*\(\s*this\s*\.\s*taxRate\s*\/\s
 Deine `calculateTaxes`-Methode sollte den Wert von `taxRate` zurückgeben (geteilt durch 100, um ihn in eine Prozentzahl umzuwandeln), multipliziert mit dem `amount`-Parameter.
 
 ```js
-console.log(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 assert.equal(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 ```
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
index 958ca1110c4..a57112ad85a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
@@ -19,37 +19,37 @@ Start by accessing the `#playlist-songs`, `#play`, and `#pause` elements with th
 You should use `document.getElementById()` to get the `#playlist-songs` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should assign the `#playlist-songs` element to the variable `playlistSongs`. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#play` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should assign the `#play` element to the variable `playButton`. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#pause` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 You should assign the `#pause` element to the variable `pauseButton`. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
index b7d94aa09ff..c1d2d57d3ca 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
@@ -16,37 +16,37 @@ Assign them to variables named `nextButton`, `previousButton`, and `shuffleButto
 You should use `document.getElementById()` to get the `#next` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should assign the `#next` element to the variable `nextButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#previous` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should assign the `#previous` element to the variable `previousButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#shuffle` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 You should assign the `#shuffle` element to the variable `shuffleButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
index 8c794194393..a2514260ee5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
@@ -18,13 +18,13 @@ Use `const` to create a variable named `audio` and set it equal to `new Audio()`
 You should use the `new` keyword to create an instance of the `Audio` object.
 
 ```js
-assert.match(code, /new\s+Audio\(\);?/)
+assert.match(code, /new\s+Audio\(\s*\);?/)
 ```
 
 You should assign the `Audio` object to a constant named `audio`.
 
 ```js
-assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\);?/)
+assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
index 9dc84e5f824..1819562409c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
@@ -34,7 +34,7 @@ assert.match(code, /userData\?\.songs\.find\(/)
 Your `find` method should have `song` as the parameter of its arrow function callback.
 
 ```js
-assert.match(code, /userData\?\.songs\.find\(\(?song\)?/)
+assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 Your `find` method should use strict equality to check if `song.id` is equal to `id`.
@@ -46,7 +46,7 @@ assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(so
 Your `find` method should be assigned to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\);?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
index dd47dfbc8c6..bd8087a600d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
@@ -13,22 +13,22 @@ Also, set the `audio.title` property equal to `song.title`. This tells the audio
 
 # --hints--
 
-You should not modify the exist `playSong` function and its content.
+You should not modify the existing `playSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?/)
 ```
 
 You should set `audio.src` to `song.src`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?/)
 ```
 
 You should set `audio.title` to `song.title`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
index 054fb2aa2ea..9295791c4b4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
@@ -17,13 +17,13 @@ Add an `if` statement to check whether the `userData?.currentSong` is `null` or
 You should create an `if` statement with the condition `userData?.currentSong === null || userData?.currentSong.id !== song.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*/)
 ```
 
 You should set `audio.currentTime` to `0` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
index d2e431078cf..f67611a0bbb 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
@@ -11,9 +11,11 @@ You need to update the current song being played as well as the appearance of th
 
 Start by accessing the `userData` object and its `currentSong` property. Set its value equal to the `song` variable.
 
+*Note*: You should not use the optional chaining operator `?.` in this step because `userData.currentSong` will not be `null` or `undefined` at this point.
+
 # --hints--
 
-You should set `userData.currentSong` to `song`.
+You should assign `song` to `userData.currentSong`.
 
 ```js
 assert.match(code, /userData\.currentSong\s*=\s*song;?/)
@@ -614,7 +616,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   --fcc-editable-region--
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
index 2d204bcdaae..9c3a2532c33 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
@@ -7,9 +7,9 @@ dashedName: step-33
 
 # --description--
 
-You need to hook up the `playSong` function to a `click` event listener so the songs will start playing when the play button is clicked.
+In previous steps you built out the functionality for playing a song. Now you need to add the functionality to the play button so that it will play the current song when it is clicked on.
 
-Add a click event listener to the `playButton` element, then use arrow syntax to pass in a callback with an empty pair of curly braces.
+Use the `addEventListener()` method and pass in a `click` event for the first argument and an empty callback function with arrow syntax for the second argument, e.g., `() => {}`.
 
 # --hints--
 
@@ -22,13 +22,13 @@ assert.match(code, /playButton\.addEventListener\(/)
 Dein Ereignis-Listener sollte auf das `click`-Ereignis hören.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback into your event listener. Don't forget you also need an empty pair of curly braces.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
index 01bf0d8b204..4df76b99ab7 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+songsHTML/);
 You should assign `array.map()` to your `songsHTML`.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\)/);
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
index 0e47d0d7ee8..befdd5ed0d2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
@@ -32,7 +32,7 @@ assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\
 You should interpolate `song.title` as the content of your `span` element.
 
 ```js
-assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\$\{song\.title\}\s*<\/span>\s*<\/button>/)
+assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\s*\$\{\s*song\.title\s*\}\s*<\/span>\s*<\/button>/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
index e107669c3ca..a1627dd7177 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
@@ -24,7 +24,7 @@ assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*/)
 Your button element should have an `aria-label` attribute with the value `Delete ${song.title}` as its second attribute and value.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2\s*>/)
 ```
 
 You should paste in the provided `svg` as the content of your `button` element.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
index 298f89607db..849436b009a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
@@ -24,7 +24,7 @@ Chain the `join()` method to your `map()` method and pass in an empty string for
 You should add `join("")` to the existing code.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\)\s*\.join\(('|")\3\);?/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\s*\)\s*\.join\(\s*('|")\3\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
index 193d47ff7fb..ff903f4a1ea 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
@@ -35,7 +35,7 @@ Call the `renderSongs` function with the `songs` property of `userData`. This wi
 You should call your `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /renderSongs\(userData\?\.songs\)/)
+assert.match(code, /renderSongs\(\s*userData\?\.songs\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
index f9cdec7744e..cbe9ea23ad6 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
@@ -9,20 +9,20 @@ dashedName: step-34
 
 Within the arrow function of the event listener, add an `if` to check if `userData?.currentSong` is `null`.
 
-Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData.songs` array. This will ensure the first song in the playlist is played first.
+Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData?.songs` array. This will ensure the first song in the playlist is played first.
 
 # --hints--
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
index 0269feb2227..834a612dd60 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
@@ -16,20 +16,20 @@ This ensures that the currently playing song will continue to play when the play
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` block to your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.currentSong.id` in the `else` block of your `if` statement.
 
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*playSong\(userData\?\.currentSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*playSong\(\s*userData\?\.currentSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -627,7 +627,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
index 9ab4b9d6884..cc8fb60ae72 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
@@ -28,13 +28,13 @@ assert.isFunction(pauseSong)
 Your `pauseSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `pauseSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
index 9d4f42caa84..1d615ea15ce 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
@@ -9,15 +9,17 @@ dashedName: step-38
 
 To store the current time of the song when it is paused, set the `songCurrentTime` of the `userData` object to the `currentTime` of the `audio` variable.
 
+*Note*: You should not use optional chaining for this step because `userData.songCurrentTime` will not be `null` or `undefined` at this point.
+
 # --hints--
 
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
-You should set `userData.songCurrentTime` to `audio.currentTime`.
+You should assign `audio.currentTime` to `userData.songCurrentTime`.
 
 ```js
 assert.match(code, /userData\.songCurrentTime\s*=\s*audio\.currentTime;?/)
@@ -618,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
index 6241183d013..a0fccaa7690 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
@@ -16,19 +16,19 @@ To finally pause the song, use the `pause()` method on the `audio` variable. `pa
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `classList` property and the `remove()` method to remove the class `playing` from the `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.remove\(('|")playing\1\);?/)
+assert.match(code, /playButton\.classList\.remove\(\s*('|")playing\1\s*\);?/)
 ```
 
 You should use the `pause()` method on your `audio` variable.
 
 ```js
-assert.match(code, /audio\.pause\(\)/)
+assert.match(code, /audio\.pause\(\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
index a3a9df77a87..5ea884cdc6f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
@@ -22,13 +22,13 @@ assert.match(code, /pauseButton\.addEventListener\(/)
 Dein Ereignis-Listener sollte auf das `click`-Ereignis hören.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `pauseSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1,\s*pauseSong\)/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1,\s*pauseSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
index ffe02f03c28..7987e446b35 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
@@ -16,13 +16,13 @@ To finally play the song, use the `play()` method on the `audio` variable. `play
 You should use the `classList` property and the `add` method to add the class `playing` to `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.add\(("|')playing\1\);?/)
+assert.match(code, /playButton\.classList\.add\(\s*("|')playing\1\s*\);?/)
 ```
 
 You should use the `play()` method on the `audio` variable.
 
 ```js
-assert.match(code, /audio\.play\(\);?/)
+assert.match(code, /audio\.play\(\s*\);?/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
 
   userData.currentSong = song;
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
index b70e71c1707..1abfd1a8083 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
@@ -28,13 +28,13 @@ assert.isFunction(playNextSong)
 Your `playNextSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playNextSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
index 8d85b522d13..6be3d8327dd 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
@@ -9,30 +9,30 @@ dashedName: step-44
 
 Inside the `playNextSong` function, create an `if` statement to check if the `currentSong` of `userData` is strictly equal to `null`. This will check if there's no current song playing in the `userData` object.
 
-If the condition is true, call the `playSong` function with the `id` of the first song in the `userData.songs` array as an argument.
+If the condition is true, call the `playSong` function with the `id` of the first song in the `userData?.songs` array as an argument.
 
 # --hints--
 
 You should not modify the existing `playNextSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside the `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
index 4d459348196..53ad5a9ba73 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
@@ -14,25 +14,25 @@ Add an `else` block to the `if` statement. Inside the `else` block, call the `ge
 You should not modify the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` to the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 You should set the `currentSongIndex` constant to `getCurrentSongIndex()` inside the `else` block.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*\}/)
 ```
 
 
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -678,7 +678,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
index 58e24df0b53..369953ce2a3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
@@ -18,25 +18,25 @@ Lastly, call the `playSong` function and pass in `nextSong.id` as the argument.
 You should not modify the existing `if` statement, its `else` block, and content.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex + 1]` to a `nextSong` constant.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `nextSong.id`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*playSong\(nextSong\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*playSong\(\s*nextSong\.id\s*\);?\s*\}/)
 ```
 
 
@@ -635,7 +635,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
index 8bb92033796..f5a3dd913bd 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
@@ -22,13 +22,13 @@ assert.match(code, /nextButton\.addEventListener\(/)
 Dein Ereignis-Listener sollte auf das `click`-Ereignis hören.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playNextSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1,\s*playNextSong\)/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1,\s*playNextSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -675,7 +675,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
index f6237cd3e67..461ba9e7358 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
@@ -26,13 +26,13 @@ assert.isFunction(playPreviousSong)
 Your `playPreviousSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playPreviousSong` function should be empty.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
index 44b49085629..11ec3df023e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
@@ -16,31 +16,31 @@ Inside the `else` block, create a constant named `currentSongIndex` and assign i
 You should not alter the existing `playPreviousSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should have an `if` statement with the condition `userData?.currentSong === null` inside your `playPreviousSong` function.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*/)
 ```
 
 You should have `return` inside the block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
 ```
 
 You should call `getCurrentSongIndex` and assign it to `currentSongIndex` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -695,7 +695,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
index 0024ebd81d5..4cda47ffe7d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
@@ -14,19 +14,19 @@ To get the previous song, subtract `1` from the `currentSongIndex` of `userData?
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex - 1]` to a `previousSong` constant.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `previousSong.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*playSong\(previousSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*playSong\(\s*previousSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
index 9f7dad01963..c44902f3d63 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
@@ -20,13 +20,13 @@ assert.match(code, /previousButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playPreviousSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1,\s*playPreviousSong\)/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1,\s*playPreviousSong\s*\)/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
index 6c56d732cdd..1697ebf9bd2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
@@ -28,19 +28,19 @@ assert.isFunction(highlightCurrentSong)
 Your `highlightCurrentSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*/)
 ```
 
 You should create a `playlistSongElements` constant inside your `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
 ```
 
 You should use the `querySelectorAll()` method to select the `.playlist-song` element and assign it to the `playlistSongElements` constant.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*\};?/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
index cc884c7c527..5d133b6f194 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
@@ -22,7 +22,7 @@ assert.isFunction(getCurrentSongIndex);
 Your `getCurrentSongIndex` function should use arrow syntax.
 
 ```js
-assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\)\s*=>\s*{\s*}\s*/);
+assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*/);
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
index bf25da8f399..fafb2009ce8 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
@@ -16,7 +16,7 @@ Use `getElementById()` to get the `id` of the currently playing song, then use t
 You should not modify the existing `highlightCurrentSong` function and its content.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*/)
 ```
 
 You should use `document.getElementById()` and pass in `` `song-${userData?.currentSong?.id}` ``.
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -692,7 +692,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
index 71cc88f3704..442496cf6f5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
@@ -33,13 +33,13 @@ assert.match(code, /playlistSongElements\.forEach\(/)
 Your `forEach()` method should have a `songEl` parameter and use arrow syntax.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*/)
 ```
 
 Your `forEach` should have an empty pair of curly braces.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -637,7 +637,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
index 873f3d31be7..51e10a93beb 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
@@ -16,19 +16,19 @@ Create an `if` statement with the condition `songToHighlight`. For the statement
 You should create an `if` statement with the condition `songToHighlight`.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*/)
 ```
 
 You should use the `setAttribute()` method on `songToHighlight` inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(/)
 ```
 
 You should pass in `"aria-current"` and `"true"` as the first and second argument of your `setAttribute` method.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\)\s*;?\s*\}?/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\s*\)\s*;?\s*\}?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
index 2bf68fe7a95..34e2f9d018a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
@@ -16,7 +16,7 @@ After that, play around with the control buttons to see how the `highlightCurren
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /highlightCurrentSong\(\)/)
+assert.match(code, /highlightCurrentSong\(\s*\)/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -688,7 +688,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
index 52e2a577bad..73fdb0a45ef 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
@@ -26,13 +26,13 @@ assert.isFunction(setPlayerDisplay)
 Your `setPlayerDisplay` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayerDisplay` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
index 64e1f04cf16..6bb79069d04 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
@@ -16,31 +16,31 @@ Access the `#player-song-title` and `#player-song-artist` elements with the `get
 You should not modify the existing `setPlayerDisplay` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use `document.getElementById()` to get the `#player-song-title` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should assign the `#player-song-title` element to the variable `playingSong`. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should use `document.getElementById()` to get the `#player-song-artist` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 You should assign the `#player-song-artist` element to the variable `songArtist`. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -716,7 +716,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
index f8cca247dbe..fc53f32592b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -710,7 +710,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
index 7777ca81ee5..a331494fea8 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -725,7 +725,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
index ded2b41d971..57ec98d015e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
@@ -16,7 +16,7 @@ Now you should see the song title and the artist show up in the display.
 You should call the `setPlayerDisplay` function inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayerDisplay\(\);?/)
+assert.match(code, /setPlayerDisplay\(\s*\);?/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
index 23fb963f0d2..472b100286d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
@@ -28,13 +28,13 @@ assert.isFunction(setPlayButtonAccessibleText)
 Your `setPlayButtonAccessibleText` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayButtonAccessibleText` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -719,7 +719,7 @@ const renderSongs = (array) => {
 
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
index d930e45baed..c852ef7247d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
@@ -16,19 +16,19 @@ Don't forget to use optional chaining.
 You should not modify the existing `setPlayButtonAccessibleText` and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should access `userData?.currentSong` or `userData?.songs[0]`.
 
 ```js
-assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 You should assign `userData?.currentSong || userData?.songs[0]` to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -715,7 +715,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
index 1694f4947d8..6e4e6b064f6 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
@@ -16,7 +16,7 @@ Don't forget you need template interpolation here, so you need to use backticks.
 You should not modify the existing `setPlayButtonAccessibleText` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `setAttribute()` method on `playButton`.
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
index 1fdc6b6ea44..5069a32d33e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
@@ -14,7 +14,7 @@ Now, call the `setPlayButtonAccessibleText` function inside the `playSong` funct
 You should call the `setPlayButtonAccessibleText` inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayButtonAccessibleText\(\);?/)
+assert.match(code, /setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -707,7 +707,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
index 94f6fb25826..b31c9c836ee 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
@@ -28,13 +28,13 @@ assert.isFunction(shuffle)
 Your `shuffle` function should use an arrow syntax and should not take a parameter.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `shuffle` function  should be empty.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -729,7 +729,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
index df5aff25981..9b002d080cc 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
@@ -24,7 +24,7 @@ Use the `sort()` method on the `userData?.songs` array. Pass a callback to the m
 You should not modify the existing `shuffle` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*{\s*[\s\S]*?\};?/);
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*{\s*[\s\S]*?\};?/);
 ```
 
 You should use the `sort()` method on `userData?.songs`.
@@ -42,7 +42,7 @@ assert.match(code, /userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*/)
 The callback of your `sort()` method should return `Math.random() - 0.5`.
 
 ```js
-assert.match(code, /userData\?.songs\.sort\s*\(\(\)\s*=>(\s*{\s*return\s+Math\.random\(\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\)\s*-\s*0\.5\s*)\);?/);
+assert.match(code, /userData\?.songs\.sort\s*\(\s*\(\s*\)\s*=>(\s*{\s*return\s+Math\.random\(\s*\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\s*\)\s*-\s*0\.5\s*)\s*\);?/);
 ```
 
 # --seed--
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -739,7 +739,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
index 3cfd7390ed7..a574c87b8ee 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
@@ -11,6 +11,8 @@ When the shuffle button is pressed, you want to set the `currentSong` to nothing
 
 Set `userData.currentSong` to `null` and `userData.songCurrentTime` to `0`.
 
+*Note*: You should not use optional chaining for this step because you are explicitly setting the `currentSong` and `songCurrentTime` properties to be `null` and `0` respectively.
+
 # --hints--
 
 You should set `userData.currentSong` to `null`.
@@ -620,7 +622,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -720,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
index caddd3ea5b9..5b95fd8dcf9 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
@@ -16,31 +16,31 @@ Call the `renderSongs` function and pass in `userData?.songs` as an argument. Al
 You should not modify the existing `shuffle` function and its content.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -741,7 +741,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
index d71352ec56a..f0144442ab1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
@@ -22,13 +22,13 @@ assert.match(code, /shuffleButton\.addEventListener\(/)
 Dein Ereignis-Listener sollte auf das `click`-Ereignis hören.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 You should pass in `shuffle` as the second value of your `click` event listener.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1,\s*shuffle\);?/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1,\s*shuffle\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
index 53f64f36f0d..b2e4499c5f2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -746,7 +746,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
index bf78f956172..d7099de6103 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
@@ -7,7 +7,7 @@ dashedName: step-73
 
 # --description--
 
-Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData.songs` array.
+Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData?.songs` array.
 
 The `filter` method keeps only the elements of an array that satisfy the callback function passed to it:
 
@@ -20,12 +20,14 @@ console.log(numsGreaterThanThree) // Output: [10, 8, 4, 5]
 
 Use the `filter()` method on `userData?.songs`. Pass in `song` as the parameter of the arrow function callback and use implicit return to check if `song.id` is strictly not equal to `id`. Assign all of that to the `userData.songs`.
 
+*Note*: You should not use optional chaining when you assign the result of  `userData?.songs.filter` to `userData.songs` because the `allSongs` array will not be `undefined` or `null` at that point.
+
 # --hints--
 
 You should not modify the existing `deleteSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should use the `filter()` method on `userData?.songs`.
@@ -647,7 +649,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -757,7 +759,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
index 88ef435282e..65d57d5ba24 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
@@ -18,25 +18,25 @@ After that, call the `highlightCurrentSong` function to highlight the current so
 You should not modify the existing `deleteSong` function and its content.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -634,7 +634,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -745,7 +745,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
index 25f426d3ef6..69c04c22516 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
@@ -16,7 +16,7 @@ Use an `if` statement to check if the `userData?.currentSong?.id` is equal to th
 You should create an empty `if` statement with the condition `userData?.currentSong?.id === id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
index 69c10b6273e..1c1c1bc60be 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
@@ -16,31 +16,31 @@ After that, call the `pauseSong()` function to stop the playback and the `setPla
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.currentSong` to `null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.songCurrentTime` to `0`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*.*\s*\}/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -755,7 +755,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
index 02f51e82139..149862ee9c3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
@@ -9,14 +9,14 @@ dashedName: step-78
 
 Next, you need to check if the playlist is empty. If it is, you should reset the `userData` object to its original state.
 
-Use an `if` statement to check if the `userData.songs` has a length of `0`.
+Use an `if` statement to check if the `userData?.songs` has a length of `0`.
 
 # --hints--
 
-You should create an empty `if` statement with the condition `userData.songs.length === 0`
+You should create an empty `if` statement with the condition `userData?.songs.length === 0`.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -738,7 +738,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
index 69e8a6fd98b..c4783719dae 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
@@ -33,19 +33,19 @@ Inside your `if` statement, declare a `resetButton` constant, then use `createEl
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*.*\s*\}/)
 ```
 
 You should use the `createElement` method to create a `button`.
 
 ```js
-assert.match(code, /document\.createElement\(('|")button\1\);?/)
+assert.match(code, /document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 You should assign your newly created `button` element to a `resetButton` constant.
 
 ```js
-assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?/)
+assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 # --seed--
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -708,7 +708,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
 
   }
 --fcc-editable-region--
@@ -769,7 +769,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
index 3c5cbe14d82..bc7477faf2c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
@@ -18,7 +18,7 @@ Set the `id` attribute of `resetButton` to `reset` and its `aria-label` attribut
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should use `resetButton.id` to create an `id` attribute named `reset` for the `resetButton`.
@@ -628,7 +628,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
index c01f36977f1..78dae65d09f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
@@ -32,7 +32,7 @@ assert.match(code, /resetButton\.appendChild\(/)
 You should pass in `resetText` as the value of your first `appendChild()`.
 
 ```js
-assert.match(code, /resetButton\.appendChild\(resetText\);?/)
+assert.match(code, /resetButton\.appendChild\(\s*resetText\s*\);?/)
 ```
 
 You should use the `appendChild()` method on `playlistSongs`.
@@ -44,7 +44,7 @@ assert.match(code, /playlistSongs\.appendChild\(/)
 You should pass in `resetButton` as the value of your second `appendChild()`.
 
 ```js
-assert.match(code, /playlistSongs\.appendChild\(resetButton\);?/)
+assert.match(code, /playlistSongs\.appendChild\(\s*resetButton\s*\);?/)
 ```
 
 # --seed--
@@ -642,7 +642,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -773,7 +773,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
index 34f60e05fad..a1c23107cc1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
@@ -22,13 +22,13 @@ assert.match(code, /resetButton\.addEventListener\(/)
 Your `resetButton` event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 The callback function of your event listener should use arrow syntax and have an empty pair of curly braces.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -690,7 +690,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -760,7 +760,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
index 0e5c680a94e..bcb7bfffce2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
@@ -7,22 +7,22 @@ dashedName: step-84
 
 # --description--
 
-You need to assign the `userData.songs` property to the initial `allSongs` array. This will reset the playlist to its original state.
+To reset the playlist to its original state, spread `allSongs` into an array and assign it to `userData.songs`.
 
-Spread `allSongs` into an array and assign it to `userData.songs`.
+*Note*: You should not use optional chaining for the `userData.songs` because the song will not be `null` or `undefined` at this point.
 
 # --hints--
 
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\s*\);?/)
 ```
 
 You should assign `[...allSongs]` to `userData.songs`.
 
 ```js
-assert.match(code, /userData\.songs\s*=\s*\[\.\.\.allSongs\]/)
+assert.match(code, /userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -684,7 +684,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
index f6e4d7f2a86..94d1a3083de 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
@@ -22,25 +22,25 @@ Remove the reset button from the playlist by calling the `remove()` method on th
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*.*\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*.*\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
 You should use the `remove()` method to remove the `resetButton` from the DOM.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*resetButton\.remove\(\);?\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*resetButton\.remove\(\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -702,7 +702,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -776,7 +776,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
index a86c27e293e..13572f71018 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
@@ -24,13 +24,13 @@ assert.match(code, /audio\.addEventListener\(/)
 The event listener you used on on your `audio` variable should listen for an `ended` event.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback to your `ended` event listener.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 
@@ -629,7 +629,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -768,7 +768,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
index ef317d13429..7deb55ce86c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
@@ -7,14 +7,14 @@ dashedName: step-77
 
 # --description--
 
-Within the button element in the `renderSongs` function, add an `onclick` attribute as the first attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
+Within the button element in the `renderSongs` function, add an `onclick` attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
 
 # --hints--
 
-You should add an `onclick` attribute as the first attribute of the delete button and pass in `deleteSong(${song.id})`.
+You should add an `onclick` attribute to the delete button and pass in `deleteSong(${song.id})`.
 
 ```js
-assert.match(code, /<button\s+onclick=('|")deleteSong\(\$\{song\.id\}\)\1\s*class=('|")playlist-song-delete\2\s*aria-label=('|")Delete\s*\$\{song\.title\}\3\s*>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")deleteSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
index 71d8098a795..135f840a469 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
@@ -7,30 +7,35 @@ dashedName: step-87
 
 # --description--
 
-Notice that the album art in the HTML and songs in the `allSongs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
+Notice that the album art in the HTML and songs in the `userData.songs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
 
 Next, you need to check if there is a next song to play. Retrieve the current song index by calling the `getCurrentSongIndex()` function, and save it in a `currentSongIndex` constant.
 
-After that, create a `nextSongExists` constant that checks if a next song exists.
+After that, create a `nextSongExists` constant that contains the boolean value `true` or `false` depending on if the next song exists.
 
 # --hints--
 
 You should not modify the existing `ended` event listener and its content.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should create a `currentSongIndex` constant and set it to the calling of the `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
-You should check if a next song exists with `userData?.songs[currentSongIndex + 1] !== undefined` and set it to a `nextSongExists` constant.
+You should check if a next song exists comparing `userData.songs.length` and `currentSongIndex` and set it to a `nextSongExists` constant. If the last index of the songs array (`userData.songs.length - 1`) is bigger than the currentSongIndex that means there is a next song.
 
 ```js
-assert.match(code, /const\s+nextSongExists\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\]\s*!==\s*undefined;?/)
+const secondPart = code.split(`audio.addEventListener("ended", () => {`)[1];
+const middlePart = secondPart.split("});")[0]
+const codeOutputFirstTest = eval(middlePart + "\nnextSongExists;");
+assert.strictEqual(codeOutputFirstTest, true);
+const codeOutputSecondTest = eval(`\nfunction getCurrentSongIndex() { return 100; };\n` + middlePart + "\nnextSongExists;")
+assert.strictEqual(codeOutputSecondTest, false);
 ```
 
 # --seed--
@@ -593,7 +598,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -657,7 +662,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -732,7 +737,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
index 7127960b94c..5339ee8ad73 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
@@ -14,13 +14,13 @@ Use an `if` statement to check if `nextSongExists` exists, then call the `playNe
 You should create an `if` statement with the condition `nextSongExists`.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*/)
 ```
 
 You should call the `playNextSong` function inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -583,7 +583,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -647,7 +647,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
index fe9d7690b7b..34c0263df03 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
@@ -14,25 +14,25 @@ If there is no next song in the playlist, use the `else` block to reset the `cur
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `currentSong` property of `userData` to `null` in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `songCurrentTime` property of `userData` to `0` in the `else` block of your `if`statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
 ```
 
 # --seed--
@@ -595,7 +595,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -659,7 +659,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
index b501496e1ef..7744b20fd0b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
@@ -17,28 +17,28 @@ You should call the `pauseSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /pauseSong\(\);?/)
+assert.match(splitter[1], /pauseSong\(\s*\);?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /setPlayerDisplay\(\);?/)
+assert.match(splitter[1], /setPlayerDisplay\(\s*\);?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -636,7 +636,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -775,7 +775,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
@@ -1418,7 +1418,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -1482,7 +1482,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -1557,7 +1557,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
index 762d2031aa1..00b961e3efe 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
@@ -26,7 +26,7 @@ Inside the `userData` object create a `songs` property. For the value, spread `a
 Your `userData` object should have a `songs` key set to `[...allSongs]`.
 
 ```js
-assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\],?/);
+assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\]\s*,?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
index e1ceb5fecaf..4e7b0ad8b08 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
@@ -14,7 +14,7 @@ To handle the current song's information and track its playback time, create a `
 You should not modify the existing `userData` object and its content.
 
 ```js
-assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\.\.\.allSongs\],?\s*/);
+assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\s*\.\.\.allSongs\s*\]\s*,?\s*/);
 ```
 
 Your `userData` object should have a `currentSong` key set to `null`.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
index 122e482c25f..0ef341bcf02 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
@@ -9,26 +9,26 @@ dashedName: step-30
 
 Add an `else` block to handle the current song's position in the playlist.
 
-Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData.songCurrentTime`.
+Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData?.songCurrentTime`.
 
 # --hints--
 
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 You should add an `else` block to the existing `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
 ```
 
-You should set `audio.currentTime` to `userData.songCurrentTime` inside the `else` block of your `if` statement.
+You should set `audio.currentTime` to `userData?.songCurrentTime` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\.songCurrentTime;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\?\.songCurrentTime;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
index 18353d7a632..bcb744be02e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
@@ -20,7 +20,7 @@ assert.match(code, /playlistSongElements\.forEach\(\s*(\(\s*songEl\s*\)|songEl)\
 You should use the `removeAttribute()` method on `songEl` and pass in `"aria-current"`.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(('|")aria-current\1\);?\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(\s*('|")aria-current\1\s*\);?\s*\}\s*\);?/)
 ```
 
 
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -691,7 +691,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
index 9b94ede082a..c0a1bd850c2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
@@ -13,10 +13,10 @@ Don't forget you need to interpolate with the dollar sign here.
 
 # --hints--
 
-You should add an `onclick` with the value `playSong(${song.id})` as the second attribute and value of the `button` element.
+You should add an `onclick` attribute with the value `playSong(${song.id})` to the `button` element.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-info\1\s*onclick\s*=\s*('|")playSong\(\$\{song\.id\}\)\2\s*>\s*<span\s+class\s*=\s*('|")playlist-song-title\3\s*>\$\{song\.title\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-artist\4\s*>\$\{song\.artist\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-duration\5\s*>\$\{song\.duration\}<\/span>\s*<\/button>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")playSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
index 5df2e5791f7..7c4be7e661a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
@@ -28,19 +28,19 @@ Use the `createTextNode()` method to create a `Reset Playlist` text, then assign
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*\}/)
 ```
 
 You should use `document.createTextNode()` to create a `Reset Playlist` text.
 
 ```js
-assert.match(code, /document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 You should assign your created text node to a `resetText` constant.
 
 ```js
-assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -703,7 +703,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
 
 
@@ -766,7 +766,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
index 9d015da91b1..22f4f478bf6 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
@@ -23,13 +23,13 @@ Pass in a callback function to the `map()` method. The callback function should
 The callback function of your `map()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?.*\)?\s*=>\s*\{\s*\}\)/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(.*\)|[^()]+)\s*=>\s*\{\s*\}\s*\)/)
 ```
 
 Your `map()` method should have a `song` parameter in it's callback function.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?song\)?/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
index cd88e34b0ad..56a72aeeed4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
@@ -14,20 +14,20 @@ const animals = ["dog", "cat", "horse"];
 animals.indexOf("cat") // 1
 ```
 
-Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData.currentSong`.
+Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData?.currentSong`.
 
 # --hints--
 
 You should return `userData?.songs.indexOf()` inside your `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\()|(\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(|\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
 ```
 
-You should pass in `userData.currentSong` into the `indexOf()` method.
+You should pass in `userData?.currentSong` into the `indexOf()` method.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\(userData\.currentSong\);?)|(\s*{\s*return\s+userData\?\.songs\.indexOf\(userData\.currentSong\);?)/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?|\s*{\s*return\s+userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?\s*})/)
 ```
 
 # --seed--
@@ -625,7 +625,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
index 64d393631e6..7cbdee48875 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
@@ -23,7 +23,7 @@ Add the `sort()` method to `userData?.songs`.
 You should add the `sort()` method to `userData?.songs`.
 
 ```js
-assert.match(code, /userData\?\.songs\.sort\(*.\);?/);
+assert.match(code, /userData\?\.songs\.sort\(.*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
index 242fc20a8e2..ab1cb55d1be 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
@@ -18,25 +18,25 @@ Die Variablen werden sich nicht ändern, also verwende `const`, um sie zu deklar
 Du solltest `document.getElementById()` verwenden, um das `#author-container`-Element zu erhalten.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 Du solltest der Variablen `authorContainer` das `#author-container`-Element zuweisen. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 Du solltest `document.getElementById()` verwenden, um das `#load-more-btn`-Element zu erhalten.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 Du solltest der Variablen `loadMoreBtn` das `#load-more-btn`-Element zuweisen. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
index 1efb689811d..60b17b373e3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
@@ -22,13 +22,13 @@ Stelle eine `GET`-Anfrage an diese URL: `https://cdn.freecodecamp.org/curriculum
 Du solltest die `fetch()`-Methode verwenden, um eine `GET`-Anfrage an `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json` zu stellen.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Nach deinem `fetch`-Aufruf sollte kein Semikolon stehen.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
index fd4fde73d87..b630e0c087b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
@@ -27,37 +27,37 @@ Nochmals: Beende den Code noch nicht mit einem Semikolon.
 Du solltest die `fetch()`-Methode verwenden, um eine `GET`-Anfrage an `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json` zu stellen.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Du solltest die `.then()`-Methode mit deiner `fetch()`-Syntax verketten
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(/)
 ```
 
 Du solltest deiner `.then()`-Methode einen `res`-Parameter hinzufügen.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
 ```
 
 Deine `.then()`-Methode sollte eine Arrow-Funktion-Syntax verwenden.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
 ```
 
 Du solltest den `res`-Parameter auf der Konsole protokollieren, damit du das `Response`-Objekt sehen kannst.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 Nach deinem `.then()` sollte kein Semikolon stehen.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
index 0f1ca508e1c..acd4f1d3d6a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
@@ -16,19 +16,19 @@ Remove `console.log(res)` and implicitly return `res.json()` instead.
 You should remove the `console.log(res)`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*console\.log\(res\)\)/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should implicitly return `res.json()` in your `.then()`.
 
 ```js
-assert.match(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\)/)
+assert.match(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\);/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\);/)
 ```
 
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
index 800a2c0bd5d..fc61ac28556 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
@@ -17,7 +17,7 @@ Verkette ein weiteres `.then()` mit der bestehenden `.then()`-Methode. Übergib
 Du solltest die `fetch()`-Methode verwenden, um eine `GET`-Anfrage an `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json` zu stellen.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Dein erstes `.then()` sollte kein Semikolon enthalten.
@@ -29,37 +29,37 @@ assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*
 Du solltest ein weiteres `.then()` mit deinem bestehenden `.then()` verketten.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 Du solltest deiner zweiten `.then()`-Methode einen `data`-Parameter hinzufügen.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Deine zweite `.then()`-Methode sollte die Arrow-Funktion-Syntax verwenden.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Deine zweite `.then()`-Methode sollte geschweifte Klammern enthalten.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Deine zweite `.then()`-Methode sollte `data` auf der Konsole hinzufügen.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
 ```
 
 Nach deinem zweiten `.then()` sollte kein Semikolon stehen.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
index 099ce2bddd5..1fe97f99e2a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
@@ -18,67 +18,67 @@ Verkette `.catch()` mit dem letzten `.then()`. Übergib ihm eine Callback-Funkti
 Du solltest die `fetch()`-Methode verwenden, um eine `GET`-Anfrage an `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json` zu stellen.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Du solltest ein weiteres `.then()` mit deinem vorhandenen `.then()` verketten.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 Du solltest deiner zweiten `.then()`-Methode einen `data`-Parameter hinzufügen.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Deine zweite `.then()`-Methode sollte eine Arrow-Funktion-Syntax verwenden.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Deine zweite `.then()`-Methode sollte geschweifte Klammern enthalten.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Deine zweite `.then()`-Methode sollte `data` auf der Konsole loggen.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)/)
 ```
 
 Dein zweites `.then()` sollte kein Semikolon enthalten.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\);/)
 ```
 
 Du solltest die `.catch()`-Methode mit dem zweiten `.then()` verketten, das du bereits hast.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
 ```
 
 Du solltest einen `err`-Parameter zu deiner `.catch()`-Methode hinzufügen.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
 ```
 
 Deine `.catch()`-Methode sollte eine Arrow-Funktion-Syntax enthalten.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
 ```
 
 Your `.catch()` method should use `console.error()` to log `err` to the console with the text `` `There was an error: ${err}` ``. Denke daran, Backticks zu verwenden.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\)\s*;?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
index 93911f6ace1..76a4f6fb788 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
@@ -48,7 +48,7 @@ assert.match(code, /let\s+authorDataArr/)
 You should set your `authorDataArr` variable to an empty array (`[]`).
 
 ```js
-assert.match(code, /let\s+authorDataArr\s*=\s*\[\];?/)
+assert.match(code, /let\s+authorDataArr\s*=\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
index 169070c3094..5d8a90b6d63 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
@@ -14,7 +14,7 @@ Inside your `displayAuthors` function, chain `.forEach()` to `authors`.
 Du solltest `.forEach()` mit `authors` verketten.
 
 ```js
-assert.match(code, /authors\.forEach\(\)/)
+assert.match(code, /authors\.forEach\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
index 65e6d2a95df..a972e00c220 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
@@ -34,7 +34,7 @@ assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*/)
 Deine Callback-Funktion sollte leer sein.
 
 ```js
-assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\)\s*=>\s*\{\s*\}\s*\);?/)
+assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
index 2166f6cdb6b..fefe42b512c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
@@ -16,7 +16,7 @@ Entferne zuerst deine `console.log()`-Anweisung. Weise dann der `authorDataArr`-
 Du solltest das Konsolenprotokoll entfernen, das `data` anzeigt.
 
 ```js
-assert.notMatch(code, /console\.log\(data\);/)
+assert.notMatch(code, /console\.log\(\s*data\s*\);/)
 ```
 
 Du solltest der `authorDataArr`-Variablen `data` zuweisen
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
index c1856087673..7bb0fb90071 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
@@ -22,19 +22,19 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 Du solltest ein Konsolen-Protokoll mit dem Text `Author Data Array:` erhalten.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1/)
 ```
 
 Du solltest Kommata verwenden, um deinen `Author Data Array:`-Text und `authorDataArr` zu trennen.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,/)
 ```
 
 `authorDataArr` should be the second argument of your console log statement.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
index ac3fd09dc81..714b11a95c8 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
@@ -22,7 +22,7 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 Du solltest die Konsolen-Protokoll-Anweisung entfernen, die `authorDataArr` anzeigt
 
 ```js
-assert.notMatch(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.notMatch(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 Du solltest deine `displayAuthors`-Funktion aufrufen.
@@ -34,19 +34,19 @@ assert.match(code, /displayAuthors\(/)
 Du solltest deine `displayAuthors`-Funktion aufrufen und als Argument `authorDataArr.slice()` übergeben.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 Dein erster Parameter deiner `slice()`-Methode sollte `startingIndex` entsprechen.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 Der zweite Parameter deiner `slice()`-Methode sollte `endingIndex` entsprechen.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\);?/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
index 6759a8b7bef..76355a76927 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
@@ -34,13 +34,13 @@ assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*/)
 Deine `fetchMoreAuthors`-Funktion sollte die Arrow-Syntax verwenden.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Deine `fetchMoreAuthors`-Funktion sollte leer sein.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*\{\s*\}/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
index 9f0edadf879..83bf60a10ae 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
@@ -24,21 +24,21 @@ Du solltest deine `displayAuthors`-Funktion aufrufen und ihr ein Argument von `a
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first argument of your `slice()` method should be `startingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second argument of your `slice()` method should be `endingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\)/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
index d71a8e0796e..86ee94c8896 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
@@ -24,13 +24,13 @@ assert.match(code, /loadMoreBtn\.addEventListener\(/)
 Dein Event -Listener sollte auf das `click`-Ereignis hören.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 Dein Event-Listener sollte `fetchMoreAuthors` als auszuführende Funktion verwenden.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1,\s*fetchMoreAuthors\);?/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1,\s*fetchMoreAuthors\s*\);?/)
 ```
 
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
index c4785bc355b..0917aa6e6f0 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
@@ -24,13 +24,13 @@ assert.match(code, /if\s*\(/)
 Deine `if`-Anweisung sollte `authorDataArr.length <= endingIndex` als Bedingung annehmen.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*/)
 ```
 
 Deine `if`-Anweisung sollte leer sein.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
index d747347002c..0a19f231a46 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
@@ -28,22 +28,21 @@ assert.match(code, /<p\s*class=("|')bio\1>/);
 You should check if the length of the `bio` text is greater than `50`.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50/)
+assert.match(code, /<p\s*class=("|')bio\1>\s*\$\{\s*bio\.length\s*>\s*50/)
 ```
 
 If the `bio` text is greater than `50` characters, you should extract the first 50 characters with `slice()` and replace the rest with `...`. Don't forget that indexes are zero-based.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:/);
 ```
 
 If the `bio` text is less than 50 characters, use the `bio` text directly.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:\s*bio\s*\}<\/p>/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:\s*bio\s*\}\s*<\/p>/);
 ```
 
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
index b77fbe9f97b..952d25f300a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
@@ -16,7 +16,7 @@ Inside the `.catch()`, remove the `console.error()` and set the `innerHTML` of t
 You should remove your `console.error` and its text.
 
 ```js
-assert.notMatch(code, /console\.error\(`There\s+was\s+an\s+error:\s+\$\{err\}`\);/)
+assert.notMatch(code, /console\.error\(\s*`There\s+was\s+an\s+error:\s+\$\{err\}`\s*\);/)
 ```
 
 You should access the `innerHTML` of `authorContainer` and set it to a `p` element. Don't forget to surround the `p` element with a template literal.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
index df7fe62351d..d1cae5c6afa 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
@@ -96,19 +96,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
index 1d36ce7183b..da48d97fbe5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
@@ -120,19 +120,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
index 69b2c8dc6db..97acc19654d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
@@ -111,19 +111,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
index 87cc62d1ee3..3f24ce2c4bd 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
index c94a08c74c2..4df21e1571c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
@@ -7,8 +7,9 @@ dashedName: step-5
 
 # --description--
 
-Now create a `fieldset` with an `id` set to `lunch`, and a corresponding `legend` and `div` element.
+Next, create a `fieldset` element with the `id` set to `lunch`.
 
+Within that element, create a `legend` element with the text `Lunch`, and an empty `div` with the `class` set to `input-container`.
 # --hints--
 
 You should create a second `fieldset` element in your `form`.
@@ -138,19 +139,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
index 31a6c46b96e..a70ad3ee9c8 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
index 4aff128e965..d75c951c9e8 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
@@ -188,19 +188,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
index 2a4445be995..69623a664d1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
index a978d0bdc6c..21d999091e6 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
@@ -190,19 +190,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
index 50bc375b677..d47e7c12cb8 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
@@ -196,19 +196,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
index b53c82f9c99..bdf24050eae 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
index eff3001393a..f2787ae59f2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
index 4b76d51c6e4..748e5f0180a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
index a1a7fe8175b..93c5b21ed5b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
@@ -29,13 +29,13 @@ You should create a variable called `calorieCounter`.
 assert.isDefined(calorieCounter);
 ```
 
-You should use `document.getElementById()` to get the `#calorie-counter` element.
+You should have `document.getElementById('calorie-counter')` in your code.
 
 ```js
 assert.match(code, /document\.getElementById\(\s*('|")calorie-counter\1\s*\)/g);
 ```
 
-You should store the `#calorie-counter` element in a variable called `calorieCounter`.
+You should assign `document.getElementById('calorie-counter')` to your `calorieCounter` variable.
 
 ```js
 assert.equal(calorieCounter, document.getElementById('calorie-counter'));
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
index 64a0e2983ba..d75b8f3bf3a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
index 90ff7f383fb..eac3d0183e3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
index 3286b2d4db0..01350bed13f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
@@ -7,6 +7,13 @@ dashedName: step-17
 
 # --description--
 
+In programming, it is standard practice to prefix a variable with `is` or `has` to indicate that the variable is a boolean.
+
+```js
+let isRunning = true;
+let hasCompleted = false;
+```
+
 Declare an `isError` variable and set it to `false`, but use `let` so you can reassign it later.
 
 # --hints--
@@ -148,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
index 1466a8bffe4..ff55ee6db44 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
@@ -28,7 +28,7 @@ assert.isFunction(cleanInputString);
 Your `cleanInputString` function should take a `str` parameter.
 
 ```js
-assert.match(cleanInputString?.toString(), /\(str\)/);
+assert.match(cleanInputString?.toString(), /\(\s*str\s*\)/);
 ```
 
 `cleanInputString` should be an empty function.
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
index da2c3d042b1..c20b6ca2571 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
index 3452d121cfc..4ceed328232 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
index dba850993a6..fc66bc69023 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
index e8c273cc59e..ecb2977c385 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
@@ -7,24 +7,26 @@ dashedName: step-22
 
 # --description--
 
-Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
-
 You will need to check if the array `["+", "-", " "]` does not include the current character. You can use a combination of the <dfn>includes()</dfn> method and the <dfn>!</dfn> operator to do this.
 
 The `.includes()` method returns `true` if the array contains the character, and `false` if not. The logical NOT operator (`!`) will return the opposite of the value of the `.includes()` method.
 
-Here is an example:
+Here is an example checking if the current character is not in the vowels array. If it is not, that current character is pushed into the `consonantArray`:
 
 ```js
-const numbersArray = [1, 2, 3, 4, 5]
-const number = 6
+const inputString = "Hello World";
+const charArray = inputString.split('');
+const consonantArray = [];
 
-if (!numbersArray.includes(number)) {
-  console.log("The number is not in the array.")
+for (let i = 0; i < charArray.length; i++) {
+  if (!['a', 'e', 'i', 'o', 'u'].includes(charArray[i])) {
+    consonantArray.push(charArray[i]);
+  }
 }
-
 ```
 
+Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
+
 # --hints--
 
 Your `for` loop should have an `if` statement.
@@ -37,19 +39,19 @@ Your `for` loop should use `!["+", "-", " "].includes()`.
 
 ```js
 // the loop protection injects code so we have to look at the raw code directly
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(/);
 ```
 
-Your `for` loop should see if `strArray[i]` is found in `["+", "-", " "]`.
+Your `for` loop should see if `!["+", "-", " "].includes(strArray[i])`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?/);
 ```
 
 Your `for` loop should `push` `strArray[i]` to `cleanStrArray`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\[i\]\s*\)\s*;?\s*(\s*\})?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*;?\s*(\s*\})?/);
 ```
 
 # --seed--
@@ -171,19 +173,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
index 226f9f6f2a4..000b1a2fc50 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
@@ -168,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
index 7767a798c5b..ff021f33396 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
index 021b954b344..2b88d2d6fd5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
index 993f2cf334a..2bda4701afe 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
index fbe18b8bf9b..59894f9db96 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
index 23794306929..709aa669451 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
index b412e6416ad..baf705ce542 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
index 2ad3ef2b100..d3c6cd6b702 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
index caee157be08..628d04add3e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
index 0c7a70d4e30..af4c7105c73 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
index 3c82eef7f16..c8bfdb6a26b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
index f18c3aa438a..8e3664f889c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
index b0b627557ed..d89dd35dfe3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
@@ -6,8 +6,13 @@ dashedName: step-35
 ---
 
 # --description--
+Strings have a <dfn>.match()</dfn> method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
 
-Strings have a `.match()` method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
+```js
+const str = 'example string';
+const regex = /example/;
+const result = str.match(regex); // Returns ['example']
+```
 
 Return the result of calling the `.match()` method on `str` and passing your `regex` variable as the argument. You'll use this match result later on.
 
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
index 88da85d8d5b..4bbc3a248d0 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
index 1acee8d4ad3..c34f37080e1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
index 56739050eaf..fbf55d26c2e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
index 26a0d1605ec..d7e4be545be 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
@@ -26,13 +26,13 @@ Replace your concatenated string in the `querySelector` with a template literal
 You should use a template literal in your `querySelector` method.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`.*`\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`.*`\s*\)/);
 ```
 
 Your template literal should have the value `{targetId} .input-container`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`\$\{targetId\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`\$\{targetId\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
index 7930f3686b4..37ea9a23e79 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
@@ -20,13 +20,13 @@ assert.notMatch(addEntry.toString(), /targetId\s*=/);
 You should replace the `targetId` reference in your template literal with `entryDropdown.value`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 You should add `#` at the beginning of your template literal.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
index c092422a303..841e4cf1585 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
index 87fe27c2b17..467a607f458 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
@@ -24,13 +24,13 @@ assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.query
 You should access the `length` property of your `querySelectorAll()`.
 
 ```js
-assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 Your `entryNumber` variable should be the `length` of the `querySelectorAll`.
 
 ```js
-assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 # --seed--
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
index c13872b28a6..b4f9dd91c19 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
index 03ef788a118..7e4f07bf4fc 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
@@ -20,7 +20,7 @@ assert.match(code, /HTMLString\s*=\s*`\n\s*<label>.*<\/label>/);
 Your `label` element should have the text `Entry ${entryNumber} Name`.
 
 ```js
-assert.match(code, /HTMLString\s*=\s*`\n\s*<label>Entry\s\$\{entryNumber\}\sName<\/label>/);
+assert.match(code, /HTMLString\s*=\s*`\n\s*<label>\s*Entry\s\$\{entryNumber\}\sName\s*<\/label>/);
 ```
 
 # --seed--
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
index d8e985d0089..7bcaa35a564 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
index 59f2a3bb82d..0a242f37aec 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
index 87310dc10e7..c94ece7b406 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
index de6b5940c4a..47fd43708d5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
@@ -185,19 +185,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
index 97faf303327..5e20de20ca2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
@@ -172,19 +172,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
index b70250e5862..b5063fcb630 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
index facfbc46d7d..8c8bcf6e0ae 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
index ac2f9154b7e..afa58497274 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
@@ -146,19 +146,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
index 06da1ff5d55..d952d13d78c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
index 43c505ac2a1..9ad9fb80a6e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
@@ -9,7 +9,25 @@ dashedName: step-50
 
 In the Role Playing Game project, you learned how to set a button's behavior by editing its `onclick` property. You can also edit an element's behavior by adding an event listener.
 
-Call the `.addEventListener()` method of the `addEntryButton`. It takes two arguments. The first is the event to listen to – you should pass the string `click`. The second is the callback function, or the function that runs when the event is triggered. Pass the `addEntry` function as the second argument. Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
+The following example uses the `addEventListener` method to add a click event to a button. When the button is clicked, the `printName` function is called.
+
+```html
+<button class="btn">Print name</button>
+```
+
+```js
+const button = document.querySelector('.btn');
+function printName() {
+  console.log("Jessica");
+}
+button.addEventListener('click', printName);
+```
+
+The `addEventListener` method takes two arguments. The first is the event to listen to. (Ex. `'click'`) The second is the callback function, or the function that runs when the event is triggered.
+
+Call the `.addEventListener()` method on the `addEntryButton`. Pass in the string `click` for the first argument and the `addEntry` function for the second argument.
+
+Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
 
 # --hints--
 
@@ -150,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
index 42b1cbb52c9..ef918af5a45 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
index 0d3def23d57..1147bdfa42c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
@@ -7,34 +7,26 @@ dashedName: step-56
 
 # --description--
 
-Der `list`-Parameter wird das Ergebnis eines Query-Selektors sein, der eine `NodeList` zurückgeben wird. Eine `NodeList` ähnelt einem Array, der die Elemente enthält, die dem Query-Selektor entsprechen.
+Der `list`-Parameter wird das Ergebnis eines Query-Selektors sein, der eine `NodeList` zurückgeben wird. A `NodeList` is a list of elements like an array. It contains the elements that match the query selector. You will need to loop through these elements in the list.
 
-You'll need to loop through these elements, so start by creating a `for` loop. Your iterator `i` should start at `0`, continue while it is less than the length of the list, and increment by `1` each iteration.
+In previous steps, you learned how to loop through an array using a `for` loop. You can also use a <dfn>for...of</dfn> loop to loop through an array and a `NodeList`.
+
+A `for...of` loop is used to iterate over elements in an iterable object like an array. The variable declared in the loop represents the current element being iterated over.
+
+```js
+for (const element of elementArray) {
+  console.log(element);
+}
+```
+
+Create a `for...of` loop that loops through the list. For the loop's variable name, use `const` to declare a variable called `item`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should have a `for` loop.
+You should have a `for...of` loop that loops through the `list` parameter. Use `item` for the loop's variable name.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(/g);
-```
-
-Your `for` loop should initialize a variable called `i` to `0`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;/g);
-```
-
-Your `for` loop should have a condition that checks if `i` is less than the length of `list`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;/g);
-```
-
-Your `for` loop should increment `i` by `1` each time it runs. Use the increment operator for this.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)/g);
+assert.match(code, /for\s*\(\s*const\s+item\s+of\s+list\s*\)\s*\{/);
 ```
 
 # --seed--
@@ -156,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
index 67263942fcf..de2cd0e0fa8 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
@@ -9,40 +9,20 @@ dashedName: step-57
 
 The `NodeList` values you will pass to `list` will consist of `input` elements. So you will want to look at the `value` attribute of each element.
 
-Assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
+Assign `item.value` to a `const` variable called `currVal`.
 
 # --hints--
 
-You should have a `currVal` variable.
+You should use `const` to declare a new variable called `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=/);
+assert.match(code, /const\s+currVal\s*=/);
 ```
 
-You should access the element in `list` at index `i` using bracket notation.
+You should assign `item.value` to `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]/);
-```
-
-You should access the `value` attribute of the element in `list` at index `i`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]\.value/);
-```
-
-You should assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*list\[i\]\.value/);
-```
-
-Your `currVal` assignment should be in your `for` loop.
-
-```js
-// another hack, because the loop protection injects stuff
-const getCaloriesString = code.split("function getCaloriesFromInputs")[1];
-assert.match(getCaloriesString, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*(const|let)\s+currVal\s*=\s*list\[i\]\.value/g);
+assert.match(code, /const\s+currVal\s*=\s*item\.value/);
 ```
 
 # --seed--
@@ -164,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,15 +224,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
+  --fcc-editable-region--
+  for (const item of list) {
 
   }
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
index a5cd70d844f..e75a5d808a9 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
@@ -9,26 +9,26 @@ dashedName: step-58
 
 Remember that you wrote a function earlier to clean the user's input? You'll need to use that function here.
 
-Update your `currVal` declaration to be the result of calling `cleanInputString` with `list[i].value`.
+Update your `currVal` declaration to be the result of calling `cleanInputString` with `item.value`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should call your `cleanInputString` function.
+You should call the `cleanInputString` function inside the `getCaloriesFromInputs` function.
 
 ```js
 assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(/);
 ```
 
-You should pass `list[i].value` as the argument for `cleanInputString`.
+You should pass `item.value` as the argument for `cleanInputString` function.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 You should assign the result of your `cleanInputString` call to your `currVal` variable.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(code, /const\s+currVal\s*=\s*cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -238,15 +231,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = list[i].value;
+  for (const item of list) {
+    --fcc-editable-region--
+    const currVal = item.value;
+    --fcc-editable-region--
   }
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
index 5b54a218688..121cf718862 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -239,8 +232,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
 
   }
 }
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
index 851f1f9ae16..d3a52bd7e72 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,8 +244,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
index 88794bd8ad1..895e9193dd0 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
@@ -23,13 +23,13 @@ You should use a template literal to pass the `Invalid Input:` message to the `a
 
 ```js
 // because it transforms template literals...
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: /);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: /);
 ```
 
-You should use template literal syntax to display the first value in the `invalidInputMatch` array after the `Invalid Input:` text.
+You should display the first element of the `invalidInputMatch` array after the `Invalid Input:` text by using a template literal.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\)/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\)/);
 ```
 
 # --seed--
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
index 4155fe1fa89..dc798dc087d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
@@ -7,6 +7,8 @@ dashedName: step-62
 
 # --description--
 
+In programming, `null` is meant to represent the absence of a value. In this case, if the user enters an invalid input, you want to alert them and then return `null` to indicate that the function has failed.
+
 Setze innerhalb deines `if`-Blocks `isError` auf `true` und gib `null` zurück.
 
 # --hints--
@@ -14,13 +16,13 @@ Setze innerhalb deines `if`-Blocks `isError` auf `true` und gib `null` zurück.
 After your `alert`, you should set `isError` to `true`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true/);
 ```
 
 Nachdem du `isError` geändert hast, solltest du `return` den Wert `null` geben.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
 ```
 
 # --seed--
@@ -142,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -233,8 +228,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
index fdb4d5543a0..d852d25cb67 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
@@ -17,6 +17,7 @@ Here is an example:
 
 ```js
 Number('10'); // returns the number 10
+Number('abc'); // returns NaN
 ```
 
 # --hints--
@@ -164,19 +165,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +249,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
index 7ffb45699a5..4d3d6436b92 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
@@ -17,12 +17,6 @@ You should `return` the `calories` value.
 assert.match(getCaloriesFromInputs.toString(), /return\s+calories/);
 ```
 
-Your new `return` statement should come after your `for` loop.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /calories\s*\+=\sNumber\(currVal\);\n\s*}\n\s*return\s+calories/)
-```
-
 # --seed--
 
 ## --seed-contents--
@@ -142,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -229,12 +216,11 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -244,9 +230,10 @@ function getCaloriesFromInputs(list) {
     }
     calories += Number(currVal);
   }
+  --fcc-editable-region--
 
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
index d6023ab073c..938e5c0ce38 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
@@ -26,7 +26,7 @@ assert.isFunction(calculateCalories);
 Your `calculateCalories` function should take an `e` argument.
 
 ```js
-assert.match(calculateCalories?.toString(), /\(e\)/);
+assert.match(calculateCalories?.toString(), /\(\s*e\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
index 4f37f8b7f8b..e52a9118bc6 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
@@ -16,7 +16,7 @@ Add a line to your `calculateCalories` function that calls the `preventDefault()
 Your `calculateCalories` function should call `e.preventDefault()`.
 
 ```js
-assert.match(calculateCalories.toString(), /e\.preventDefault\(\)/);
+assert.match(calculateCalories.toString(), /e\.preventDefault\(\s*\)/);
 ```
 
 Your `calculateCalories` function should reset the global error flag to `false`.
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -240,8 +233,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
index b4ef1f48578..7d5d9939c9c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
@@ -22,13 +22,13 @@ assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#breakfast input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `odocument.querySelectorAll()` call to `breakfastNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -249,8 +242,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
index 7fdcbce889b..bdb20b33ba2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#lunch input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `lunchNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -248,8 +241,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
index e466c052eb9..89f7c4fa955 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#dinner input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `dinnerNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `snacksNumberInputs` variable.
@@ -38,13 +38,13 @@ assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#snacks input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `snacksNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `exerciseNumberInputs` variable.
@@ -56,13 +56,13 @@ assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#exercise input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `exerciseNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -285,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
index 90445425fc2..70583789b57 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +248,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
index aa3f2effac8..06fb78ae6cd 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -254,8 +247,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
index 02d6cfa3fe0..2dfc2ca200a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -291,8 +284,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
index 645ea54b067..6353e7bb772 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -262,8 +255,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
index bda9eb9802b..24bcb540153 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -260,8 +253,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
index 2b43d797b5a..5e009a3a06f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -270,8 +263,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
index ae828d8c917..bc180185668 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -265,8 +258,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
index e9c65d40644..7d7622f7230 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
@@ -162,19 +162,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +273,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
index b4f4f3f7c1e..a531281c8f5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
@@ -7,7 +7,7 @@ dashedName: step-78
 
 # --description--
 
-You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element.
+You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element on a new line at the end of the function.
 
 # --hints--
 
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -263,8 +256,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
index 1aadb27ea04..e4efd959663 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
@@ -7,9 +7,16 @@ dashedName: step-79
 
 # --description--
 
-Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable, but lowercased.
+When you need to lower case a string, you can use the <dfn>toLowerCase()</dfn> method. This method returns the calling string value converted to lower case.
 
-Strings have a `.toLowerCase()` method that can help you with this. Do not give your `span` any text yet.
+```js
+const firstName = 'JESSICA';
+console.log(firstName.toLowerCase()); // Output: jessica
+```
+
+Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable. Your `surplusOrDeficit` variable should be converted to lower case using the `toLowerCase()` method.
+
+Do not give your `span` any text yet.
 
 # --hints--
 
@@ -160,19 +167,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -279,8 +279,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
index bf532c2d76a..013b039310d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -258,8 +251,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
index e8afec8fbe2..141e0a9dd33 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
@@ -9,7 +9,14 @@ dashedName: step-81
 
 When the user has a calorie deficit, the `remainingCalories` value will be negative. You don't want to display a negative number in the result string.
 
-`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number. In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
+`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number.
+
+```js
+const num = -5;
+Math.abs(num); // 5
+```
+
+In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
 
 # --hints--
 
@@ -24,7 +31,7 @@ Your `span` should have the text `${Math.abs(remainingCalories)} Calorie ${surpl
 
 ```js
 const htmlString = code.split(/output\s*\.\s*innerHTML\s*=\s*/)[1].split(/`/)[1];
-assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(remainingCalories\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
+assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(\s*remainingCalories\s*\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
 ```
 
 # --seed--
@@ -146,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -267,8 +267,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
index f447aeb9daf..6f429cd7375 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
index 120a52d2d4f..60b0d30471a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -283,8 +276,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
index 779a4d3131e..157a277b943 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
@@ -158,19 +158,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -282,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
index bc80c80776a..f155159d13f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
@@ -9,6 +9,11 @@ dashedName: step-85
 
 Finally, you need to make the `#output` element visible so the user can see your text. Your `output` variable is an Element, which has a `classList` property. This property has a `.remove()` method, which accepts a string representing the class to remove from the element.
 
+```js
+const paragraphElement = document.getElementById('paragraph');
+paragraphElement.classList.remove('hide');
+```
+
 Use the `.remove()` method of the `output` variable's `classList` property to remove the `hide` class. Don't forget to place the word `hide` inside quotes.
 
 # --hints--
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -277,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
index 64f42215239..22af262b544 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
index b22aa592dd7..5ccda252864 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
index b4afeaf230a..e94620fb924 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
index 3443fcb0e1a..178d3ac6922 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
@@ -9,6 +9,22 @@ dashedName: step-89
 
 Remember that `document.querySelectorAll` returns a `NodeList`, which is array-like but is not an array. However, the `Array` object has a `.from()` method that accepts an array-like and returns an array. This is helpful when you want access to more robust array methods, which you will learn about in a future project.
 
+The following example takes a `NodeList` of `li` elements and converts it to an array of `li` elements:
+
+```html
+<ul>
+  <li>List 1</li>
+  <li>List 2</li>
+  <li>List 3</li>
+</ul>
+```
+
+```js
+const listItemsArray = Array.from(document.querySelectorAll('li'));
+
+console.log(listItemsArray); //Output: (3) [li, li, li]
+```
+
 Wrap your `inputContainers` query selector in `Array.from()`. Dies erfolgt in der gleichen Zeile wie deine Deklaration.
 
 # --hints--
@@ -144,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -269,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
index 50b24045f81..b53346ffdbb 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
@@ -7,33 +7,25 @@ dashedName: step-90
 
 # --description--
 
-It is time for another loop. Use a `for` loop to iterate through the `inputContainers` array.
+It is time for another loop. Create a `for...of` loop with a variable called `container` to iterate through the `inputContainers` array.
 
-Inside the loop, set the `innerHTML` property of the element at the current index to an empty string. Dies wird den gesamten Inhalt des Eingabebehälters löschen.
+Inside the loop, set the `innerHTML` property of the `container` to an empty string. Dies wird den gesamten Inhalt des Eingabebehälters löschen.
 
 # --hints--
 
-Your `clearForm` function should have a `for` loop.
+Your `for...of` loop should iterate through the `inputContainers` array. The loop's variable name should be `container`.
 
 ```js
-// loop protect injects stuff, so let's look at the raw code again
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(/);
+assert.match(clearForm, /for\s*\(\s*const\s+container\s+of\s+inputContainers\s*\)/);
 ```
 
-Your `for` loop should iterate through the `inputContainers` array. Remember to use `i` as your iterator.
+Your `for...of` loop should set the `innerHTML` property of `container` to an empty string.
 
 ```js
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*inputContainers\.length\s*;\s*i\s*\+\+\s*\)/);
-```
-
-Your `for` loop should set the `innerHTML` property of `inputContainers[i]` to an empty string.
-
-```js
-const clearForm = code.split("function clearForm()")[1];
-const forLoop = clearForm.split("for")[1];
-assert.match(forLoop, /inputContainers\[\s*i\s*\]\s*\.innerHTML\s*=\s*(`|'|")\1\s*/);
+const forOfLoop = clearForm.split("for")[1];
+assert.match(forOfLoop, /container\s*\.\s*innerHTML\s*=\s*(`|'|")\1\s*/);
 ```
 
 # --seed--
@@ -155,19 +147,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +265,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
index 8ac5ee226a6..7924cfeb607 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
index 5b6f355c052..a0562dc693f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
index aeda606d8b0..45e95775712 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
index dd9dbad1bde..77cc5235005 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -292,8 +285,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
@@ -425,19 +418,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -550,8 +536,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -567,8 +553,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
index dbfbd16e8c5..8919641f1c7 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
@@ -16,13 +16,13 @@ In your `createLabel` function, declare a `label` variable and assign it a new `
 You should declare a `label` variable in your `createLabel` function.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*(?:const|let|var)\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*(?:const|let|var)\s+label/);
 ```
 
 Your `label` variable should be declared with `const`.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*const\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*const\s+label/);
 ```
 
 You should use the `.createElement()` method of the `document` object.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
index 059eb27bbf6..e01cceceb2c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
@@ -22,7 +22,7 @@ assert.match(code, /letters\.forEach\(/);
 You should pass your `createLabel` function reference to the `.forEach()` method.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*createLabel\s*\)/);
+assert.match(code, /letters\.forEach\(\s*(?:\(\s*([\S]*)\s*\)|\s*([\S]*))\s*=>\s*createLabel\(\s*\1\2\s*\)\s*\)|letters\.forEach\(\s*createLabel\s*\)/);
 ```
 
 You should not pass a `createLabel` function call.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
index 728e5fb37a4..03f303a231d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-In your callback, call `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
+In your callback, you will need to make two function calls. Start by calling `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
 
 Then call the `.forEach()` method on your `letters` array. Pass an empty callback function which takes a `letter` parameter.
 
@@ -46,7 +46,13 @@ assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{/)
 Your callback function should be empty.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{\s*\}/)
+assert.match(code, /letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}/)
+```
+
+Your `letters.forEach()` callback function should be nested inside the `range(1, 99).forEach(number => {}` callback function.
+
+```js
+assert.match(code, /range\s*\(\s*1\s*,\s*99\s*\)\s*.forEach\s*\(\s*(\(\s*number\s*\)|number)\s*=>\s*\{\s*[^}]*letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}\s*\)\s*\}\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
index 308b9968308..83cd5a7e616 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
@@ -9,8 +9,6 @@ dashedName: step-17
 
 Now in your nested `.forEach()` call, declare an `input` variable. Use the `.createElement()` method of the `document` object to create an `input` element. Set the `type` attribute to `text` and the `id` attribute to `letter + number`.
 
-For accessibility, set the `aria-label` attribute to the same value as the `id` attribute.
-
 # --hints--
 
 You should declare an `input` variable.
@@ -67,18 +65,6 @@ You should set the `id` attribute of your `input` element to `letter + number`.
 assert.match(code, /input\.id\s*=\s*letter\s\+\snumber/)
 ```
 
-You should access the `ariaLabel` property of your `input` element.
-
-```js
-assert.match(code, /input\.ariaLabel/);
-```
-
-You should set the `aria-label` attribute of your `input` element to `letter + number`.
-
-```js
-assert.match(code, /input\.ariaLabel\s*=\s*letter\s\+\snumber/)
-```
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
index 4b7b44216a3..42633bfd960 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
@@ -1,8 +1,8 @@
 ---
 id: 643498328cb52026123e2b91
-title: Schritt 18
+title: Step 19
 challengeType: 0
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
index be84c5b823b..8d1ddcd5fb5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
@@ -1,8 +1,8 @@
 ---
 id: 643498755d54c6279ba09078
-title: Schritt 19
+title: Step 20
 challengeType: 0
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
index 0bb493d5244..9d06932a530 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
@@ -1,8 +1,8 @@
 ---
 id: 6437124c4c03dd4c8fb35d56
-title: Schritt 20
+title: Step 21
 challengeType: 0
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
index 94e6932b57a..58e532930ff 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
@@ -1,8 +1,8 @@
 ---
 id: 6437133052eaf04d7300e622
-title: Schritt 21
+title: Step 22
 challengeType: 0
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
index fba8b0bc2eb..b23e311ab0e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
@@ -1,8 +1,8 @@
 ---
 id: 643715013330824ecaa70442
-title: Schritt 22
+title: Step 23
 challengeType: 0
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
index e123e760edc..b21105e6978 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d1e5af8c0148fbef96d
-title: Schritt 23
+title: Step 24
 challengeType: 0
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
index d560452f4a7..814d8615a58 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d80bc174a158c973080
-title: Schritt 24
+title: Step 25
 challengeType: 0
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
@@ -50,19 +50,19 @@ assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*n
 The first element of the array passed to `average()` should be the element at the `middle` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]/);
 ```
 
 The first element of the array passed to `average()` should be the element at the `middle + 1` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\)/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)/);
 ```
 
 If the ternary is false, you should return the value of `sorted` at the `middle` index. Verwende `Math.ceil()`, um den `middle` Wert aufzurunden.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\[\s*Math\.ceil\(\s*middle\s*\)\s*\];?/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\s*\[\s*Math\.ceil\(\s*middle\s*\)\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
index 5296cdc834c..efe3f42753d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
@@ -1,8 +1,8 @@
 ---
 id: 64496df724dd3716a71fe971
-title: Schritt 25
+title: Step 26
 challengeType: 0
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
index d7b16ed06d6..7b8b7d9ffe6 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
@@ -1,8 +1,8 @@
 ---
 id: 64496e9c6d7a2e189948e441
-title: Schritt 26
+title: Step 27
 challengeType: 0
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
index 7536d566fa7..52e6a20efa0 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
@@ -1,8 +1,8 @@
 ---
 id: 6449749d20436c1f1dfadcf2
-title: Schritt 27
+title: Step 28
 challengeType: 0
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
index f66a7435f5d..63c290f2fb7 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
@@ -1,8 +1,8 @@
 ---
 id: 6449755666005520330cec5b
-title: Schritt 28
+title: Step 29
 challengeType: 0
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
index 753e83e208a..1dc1617bd6e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
@@ -1,8 +1,8 @@
 ---
 id: 64497da4062602213ecf32e7
-title: Schritt 29
+title: Step 30
 challengeType: 0
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
index 6c77c312ee1..b09d1200a10 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
@@ -1,8 +1,8 @@
 ---
 id: 64497de936a2f322327e5c58
-title: Schritt 30
+title: Step 31
 challengeType: 0
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
index 9e887bc4e83..9a418bcf2fb 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e0e5e5a2c2329785af4
-title: Schritt 31
+title: Step 32
 challengeType: 0
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
@@ -16,7 +16,7 @@ Use the `&&` operator to add a second condition to your `if` statement that also
 You should use the `&&` operator to add a second condition to your `if` statement that also checks if the first character of `value` is `=`. You may use `[0]`, `.startsWith()`, or `.charAt(0)`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
index 361cc00ad8c..cea5d468a27 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e764135bd24b7960dd3
-title: Schritt 32
+title: Step 33
 challengeType: 0
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
index 2004ca19d88..117a075e0f3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
@@ -1,8 +1,8 @@
 ---
 id: 6449842c6f6c84261075e4c9
-title: Schritt 33
+title: Step 34
 challengeType: 0
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
index 8f19d0206cf..f331b2e13dc 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
@@ -1,8 +1,8 @@
 ---
 id: 64498473a17adc26ef0ecc2d
-title: Schritt 34
+title: Step 35
 challengeType: 0
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
index bf637af2940..869aa786b1b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
@@ -1,8 +1,8 @@
 ---
 id: 6449849b78f43527be1e8a98
-title: Schritt 35
+title: Step 36
 challengeType: 0
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
index 05cf7d3f9f2..379d979b83e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
@@ -1,8 +1,8 @@
 ---
 id: 64498542cab69128ab24e4de
-title: Schritt 36
+title: Step 37
 challengeType: 0
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
index 07cfa7452ae..db2048f5154 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
@@ -1,8 +1,8 @@
 ---
 id: 6449860d84c9e22cbd7b497c
-title: Schritt 37
+title: Step 38
 challengeType: 0
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
index deb900db4ff..1d217df30cf 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
@@ -1,8 +1,8 @@
 ---
 id: 6449863f592af72d9be0959e
-title: Schritt 38
+title: Step 39
 challengeType: 0
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
index 2d7b65e90f9..97250208fe7 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
@@ -1,8 +1,8 @@
 ---
 id: 6449874d5191562eb3313b3f
-title: Schritt 39
+title: Step 40
 challengeType: 0
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
index d100209899b..f48039d757e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
@@ -1,8 +1,8 @@
 ---
 id: 6449876e7aae0d2f8257a497
-title: Schritt 40
+title: Step 41
 challengeType: 0
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
index 760d7f23d03..6e3f9b611c6 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
@@ -1,8 +1,8 @@
 ---
 id: 64498b085028fc30a58bb6a7
-title: Schritt 41
+title: Step 42
 challengeType: 0
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
index 23c212359c0..d0a3366315c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0889c6ff4baa46ac1c50
-title: Schritt 42
+title: Step 43
 challengeType: 0
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
index 7d504d871ad..716a7d4ca9a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
@@ -1,8 +1,8 @@
 ---
 id: 646d09a07241aaab1e777080
-title: Schritt 43
+title: Step 44
 challengeType: 0
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
index 2ecaae996d5..70022de4004 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0a022da7bcabf3e3aca3
-title: Schritt 44
+title: Step 45
 challengeType: 0
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
index 980fda37556..28ec9801c66 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0d20108440acc95a6b32
-title: Schritt 45
+title: Step 46
 challengeType: 0
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
index a74e4d92f1b..e8720b88a53 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0db5175974ad8633b71c
-title: Schritt 46
+title: Step 47
 challengeType: 0
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
index 37695c19e61..d5c1b76abff 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0e4636e14eae2bb3b992
-title: Schritt 47
+title: Step 48
 challengeType: 0
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
index 1913580ee11..bce3cb02167 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1980018efaaec2b1c28b
-title: Schritt 48
+title: Step 49
 challengeType: 0
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
index 4b490bc8769..7f8eb0a90b8 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
@@ -1,8 +1,8 @@
 ---
 id: 646d19fc4705e4af65c3e688
-title: Schritt 49
+title: Step 50
 challengeType: 0
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
index 94441cace4a..8362f62bda6 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1b96dd7ea4b0061458bc
-title: Schritt 50
+title: Step 51
 challengeType: 0
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
index 9ac7baab59d..fb0d686e40d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
@@ -1,13 +1,13 @@
 ---
 id: 646d1cadf0d96ab0b7e12da4
-title: Schritt 51
+title: Step 52
 challengeType: 0
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
 
-Because `elemValue` returns a function, your `addChars` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
+Because `elemValue` returns a function, your `addCharacters` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
 
 <!-- TODO: Explain further? -->
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
index 56393c20f24..3e1e93f8339 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1d67f9261fb15a795588
-title: Schritt 52
+title: Step 53
 challengeType: 0
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
index 50636793a3c..5cfd01c19a3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1e531042dfb24da1f032
-title: Schritt 53
+title: Step 54
 challengeType: 0
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
@@ -16,13 +16,13 @@ The callback function takes a few parameters. The first is the matched string. P
 You should pass an arrow function as the second argument to your `.replace()` method.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 Your arrow function should take a `match` parameter.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
index e9213e4046b..4e0bdcafe1b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3141790b3cb337dd611a
-title: Schritt 54
+title: Step 55
 challengeType: 0
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
index 8eb6d6412a2..a976d2e313d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
@@ -1,8 +1,8 @@
 ---
 id: 646d382c4d70ceb3dba1e830
-title: Schritt 55
+title: Step 56
 challengeType: 0
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
index b4d41e5d977..7a1435a9e93 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
@@ -1,8 +1,8 @@
 ---
 id: 646d386a685620b49db4be76
-title: Schritt 56
+title: Step 57
 challengeType: 0
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
index 4edd52f0e31..c6980b6b44a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38c326f3c8b54023de38
-title: Schritt 57
+title: Step 58
 challengeType: 0
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
index 4d9751bb8f2..0af42bfb322 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38f906b94cb5fe6ce7de
-title: Schritt 58
+title: Step 59
 challengeType: 0
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
index 4a3af777b63..daa12199dcb 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3952f6af37b6a1c241c2
-title: Schritt 59
+title: Step 60
 challengeType: 0
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
index 603b39bb5e8..e9f8b5ce15d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
@@ -1,8 +1,8 @@
 ---
 id: 646d39c156fe94b7482c3ab6
-title: Schritt 60
+title: Step 61
 challengeType: 0
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
index 81704bae5b1..3fa9bd07097 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3b27cd3c56b875256301
-title: Schritt 61
+title: Step 62
 challengeType: 0
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
index 9710cbe586e..67a462a846b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3bc75fe0c9b972da3323
-title: Schritt 62
+title: Step 63
 challengeType: 0
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
index 0616ab89a7b..ec294284249 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3c146e10b0ba222bb2a7
-title: Schritt 63
+title: Step 64
 challengeType: 0
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
index 5de882bb9cb..8cab1f9a705 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d037872fbbae0a8ec0e
-title: Schritt 64
+title: Step 65
 challengeType: 0
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
index d77ffa24e27..ac2b2139a7b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d65be79c8bb9c7df9ff
-title: Schritt 65
+title: Step 66
 challengeType: 0
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
index fd264fa42e1..a0ff5e568d5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d80c3b4aebc4103618e
-title: Schritt 66
+title: Step 67
 challengeType: 0
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
index b26ee7a4408..88d6b29d654 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3da8501e15bcd355ba1d
-title: Schritt 67
+title: Step 68
 challengeType: 0
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
index e51a69c411b..dbb9bcd51bc 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e135ab3abbdbfe5c899
-title: Schritt 68
+title: Step 69
 challengeType: 0
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
index 7605c835f14..8c653ee86f4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e64b15f92be6e61704e
-title: Schritt 69
+title: Step 70
 challengeType: 0
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str
 Your callback function should use bracket notation to access the property of the `infixToFunction` object that matches the value of the `operator` parameter.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
index ad138875641..e9aaaba4144 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3ee7b17ae3bf48610033
-title: Schritt 70
+title: Step 71
 challengeType: 0
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
@@ -14,19 +14,19 @@ dashedName: step-70
 Your callback function should return the result of calling `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(/);
 ```
 
 You should pass `arg1` as the first argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1/);
 ```
 
 You should pass `arg2` as the second argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
index 6ebef8a40a1..2145e640b31 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f1fd12f76c02c823bb8
-title: Schritt 71
+title: Step 72
 challengeType: 0
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
@@ -16,13 +16,13 @@ Wrap each of your `infixToFunction[operator]` arguments in a `parseFloat()` call
 You should wrap `arg1` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
 ```
 
 You should wrap `arg2` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
index 74e1937af0c..3f2cf9810f4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f718b5f8dc102cd528e
-title: Schritt 72
+title: Step 73
 challengeType: 0
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
index 99f98bdb32d..d7bdc37d7b2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
@@ -1,8 +1,8 @@
 ---
 id: 646d404259f512c1a9e86ac1
-title: Schritt 73
+title: Step 74
 challengeType: 0
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
index 2e191b06f83..167d450138d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40c543943ec250039682
-title: Schritt 74
+title: Step 75
 challengeType: 0
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
index 16bf10c38ce..5c8428785d3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40fe4b7b50c30c2b4cd8
-title: Schritt 75
+title: Step 76
 challengeType: 0
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
index a5481502fcd..0bc08a4012e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
@@ -1,8 +1,8 @@
 ---
 id: 646d41e23b583fc3b8cc4579
-title: Schritt 76
+title: Step 77
 challengeType: 0
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
index 01c57c3196d..16562b4bb2f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
@@ -1,8 +1,8 @@
 ---
 id: 646d423fade4a9c4636acd13
-title: Schritt 77
+title: Step 78
 challengeType: 0
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
index efd29205a01..efc5d0ffc18 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
@@ -1,8 +1,8 @@
 ---
 id: 646d42f58deb2fc52adc6611
-title: Schritt 78
+title: Step 79
 challengeType: 0
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
index caaa32ff779..02383be897f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d43587d926bc5b6cb2e50
-title: Schritt 79
+title: Step 80
 challengeType: 0
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
index d52ce152562..1ea064565a1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d448479c8fdc8dcec868c
-title: Schritt 80
+title: Step 81
 challengeType: 0
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
index defd8550f94..6e0e5ff6793 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d44da986f2bc9b72f5fe2
-title: Schritt 81
+title: Step 82
 challengeType: 0
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
index 886bf31f12a..3d6821dadd1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
@@ -1,8 +1,8 @@
 ---
 id: 646d451c2e44afca71b67818
-title: Schritt 82
+title: Step 83
 challengeType: 0
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
index 05530c29e2a..7776409e850 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4554721d43cb19a68bc4
-title: Schritt 83
+title: Step 84
 challengeType: 0
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
@@ -28,13 +28,13 @@ assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*cons
 Your `apply` function should access the property of the `spreadsheetFunctions` object that matches the `fn` value.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn/);
 ```
 
 Your `apply` function should call the `.toLowerCase()` method on `fn` in the property access.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]/);
 ```
 
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
index 3f887d9b67a..b14d113cdfd 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45b739da5ecbf830c108
-title: Schritt 84
+title: Step 85
 challengeType: 0
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Your `apply` function is returning the spreadsheet function, but not actually ap
 Your `apply` function should call the `spreadsheetFunctions[fn.toLowerCase()]` function.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(/);
 ```
 
 You should pass a `toNumberList()` call to your `spreadsheetFunctions[fn.toLowerCase()]` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(/);
 ```
 
 You should pass `args` to your `toNumberList()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
index 897a7c1274f..95734fb4ffe 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45ee725632cca2555146
-title: Schritt 85
+title: Step 86
 challengeType: 0
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Now your `applyFunction` needs to return a result. Return the result of calling
 Your `applyFunction` function should return the result of calling the `.replace()` method on `str2`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(/);
 ```
 
 You should pass `functionCall` as the first argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall/);
 ```
 
 You should pass an empty arrow function as the second argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
 ```
 
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
index 49c28b4d8eb..8eb18bbd464 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4626420eeecd51f241c2
-title: Schritt 86
+title: Step 87
 challengeType: 0
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Remember to make `fn` lower case.
 Your callback function should have `match` as the first parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
 ```
 
 Your callback function should have `fn` as the second parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
 ```
 
 Your callback function should have `args` as the third parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
 ```
 
 Your callback function should use an implicit return.
 
 ```js
-assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
+assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
 ```
 
 Your callback function should return the result of calling the `.hasOwnProperty()` method on the `spreadsheetFunctions` object.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
 ```
 
 You should pass `fn` to the .`hasOwnProperty()` method.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn/);
 ```
 
 You should call the `.toLowerCase()` method on `fn`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
index 9958fe23133..1fd62328533 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d467c6994f4ce0dc416a4
-title: Schritt 87
+title: Step 88
 challengeType: 0
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
@@ -14,31 +14,31 @@ Use the ternary operator to turn your `.hasOwnProperty()` call into the conditio
 Your callback function should use ternary syntax.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
 ```
 
 If the ternary condition is true, your callback function should return the result of calling `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\s*\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\s*\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
 ```
 
 You should pass `fn` as the first argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
 ```
 
 You should pass `args` as the second argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
 ```
 
 If the ternary is false, you should return `match`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
index 1acf4335d6b..c9f258c6047 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
@@ -1,8 +1,8 @@
 ---
 id: 646d46c03e7d02cecb30f021
-title: Schritt 88
+title: Step 89
 challengeType: 0
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
@@ -14,25 +14,25 @@ Now you can start applying your function parser to your `evalFormula` logic. Dec
 You should declare a `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
 ```
 
 You should use `const` to declare your `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*const\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*const\s+functionExpanded\s*=\s*/);
 ```
 
 Du solltest der `functionExpanded`-Variablen das Ergebnis des Aufrufs deiner `applyFunction`-Funktion zuweisen.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
 ```
 
 You should pass `cellExpanded` to your `applyFunction` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
index 8f72aeb1804..48b1cab80ed 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4717a689e1cfa232e357
-title: Schritt 89
+title: Step 90
 challengeType: 0
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Use a ternary to check if `functionExpanded` is equal to the original string `x`
 Your `evalFormula` function should use the `return` keyword.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
 ```
 
 Your `return` statement should check if `functionExpanded` is equal to `x`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
 ```
 
 Your `return` statement should use a ternary operator.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
 ```
 
 If the ternary condition is true, your `evalFormula()` should return `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
 ```
 
 If the ternary condition is false, your `evalFormula()` should return the result of calling `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
 ```
 
 You should pass `functionExpanded` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
 ```
 
 You should pass `cells` as the second argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
index 9c937d75f48..c1249111d86 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4769ba65f1d05ef6b634
-title: Schritt 90
+title: Step 91
 challengeType: 0
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
@@ -16,19 +16,19 @@ Inside your `if` statement, set the `value` of the `element` to be the result of
 You should update the `value` property of `element` in your `if` block.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
 ```
 
 You should assign the `value` property the result of calling your `evalFormula()` function.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
 ```
 
 You should not pass any arguments to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
index 21f96198c8a..9ef5920b36a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
@@ -1,8 +1,8 @@
 ---
 id: 646d47c8f58107d10f1e5106
-title: Schritt 91
+title: Step 92
 challengeType: 0
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
@@ -14,19 +14,19 @@ The first argument for your `evalFormula` call needs to be the contents of the c
 You should pass `value` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
 ```
 
 You should call the `.slice()` method on the `value` argument.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(/);
 ```
 
 You should pass the number `1` as the argument to your `.slice()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(\s*1\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
index 55fff6f7c7d..c2b4d2b8c71 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4813c17b37d1e261a566
-title: Schritt 92
+title: Step 93
 challengeType: 0
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
@@ -14,19 +14,19 @@ You can quickly get all cells from your page by getting the `#container` element
 For the second parameter of your `evalFormula()` call, you should call the `.getElementById()` method of the `document` object.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
 ```
 
 You should pass `container` as the argument to your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
 ```
 
 You should access the `children` property of the result of your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
index d901140d646..ac6184b9d56 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
@@ -1,8 +1,8 @@
 ---
 id: 646d486aec20f7d2a581cc36
-title: Schritt 93
+title: Step 94
 challengeType: 0
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
@@ -14,7 +14,7 @@ Unfortunately, that `children` property is returning a collection of elements, w
 You should wrap your `document.getElementById('container').children` in `Array.from()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
index 5e50767ee77..98ffeb00088 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
@@ -1,8 +1,8 @@
 ---
 id: 646d48b936802fd34c3f05af
-title: Schritt 94
+title: Step 95
 challengeType: 0
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
index 109c906b6d6..a4c682f9df4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d498c8ebc31d3f753b22e
-title: Schritt 95
+title: Step 96
 challengeType: 0
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
index 82408dd9f43..43c6ebe6441 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
@@ -1,8 +1,8 @@
 ---
 id: 646d49bfff9079d4b38df115
-title: Schritt 96
+title: Step 97
 challengeType: 0
-dashedName: step-96
+dashedName: step-97
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
index 94b2f9a721d..5992f59bd86 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a07a8fb14d55cd70e09
-title: Schritt 97
+title: Step 98
 challengeType: 0
-dashedName: step-97
+dashedName: step-98
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
index 8eb6fd900c2..983d30989b0 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a5b32a1cad6165df286
-title: Schritt 99
+title: Step 100
 challengeType: 0
-dashedName: step-99
+dashedName: step-100
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
index 97124a45de9..684e699ffc7 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a8dbc04c6d6bb0001f8
-title: Schritt 100
+title: Step 101
 challengeType: 0
-dashedName: step-100
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
index ff02f0afe7d..54c2a26dd3f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4ab9b3b4c5d74fdd2154
-title: Schritt 101
+title: Step 102
 challengeType: 0
-dashedName: step-101
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
index 5a7078cc8b6..89e89d3ac90 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4b3d80ea98d824c8a4f9
-title: Schritt 102
+title: Step 103
 challengeType: 0
-dashedName: step-102
+dashedName: step-103
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
index 88dc58da945..eb5424ffa9d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
@@ -1,8 +1,8 @@
 ---
 id: 6491d38f5b09a021c4b5d5fe
-title: Schritt 98
+title: Step 99
 challengeType: 0
-dashedName: step-98
+dashedName: step-99
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
new file mode 100644
index 00000000000..3a606f8e1cf
--- /dev/null
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
@@ -0,0 +1,104 @@
+---
+id: 65ae458e23954c3469e0c209
+title: Step 18
+challengeType: 0
+dashedName: step-18
+---
+
+
+# --description--
+
+In earlier projects you learned about the `setAttribute` method. Another way to update an attribute in JavaScript is to use the following syntax:
+
+```js
+el.attribute = value;
+```
+
+The property names for hyphenated HTML attribute values, such as `aria-label`, follow camel case, becoming `ariaLabel`.
+
+```js
+el.ariaLabel = "Aria Label Value";
+```
+
+Set the `aria-label` attribute for the `input` element to the same value as the `id` attribute.
+
+
+# --hints--
+
+You should have an `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=/);
+```
+
+
+You should assign `letter + number` to `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=\s*letter\s*\+\s*number/);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="./styles.css" />
+    <title>Functional Programming Spreadsheet</title>
+  </head>
+  <body>
+    <div id="container">
+      <div></div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+#container {
+  display: grid;
+  grid-template-columns: 50px repeat(10, 200px);
+  grid-template-rows: repeat(11, 30px);
+}
+
+.label {
+  background-color: lightgray;
+  text-align: center;
+  vertical-align: middle;
+  line-height: 30px;
+}
+```
+
+```js
+const range = (start, end) => Array(end - start + 1).fill(start).map((element, index) => element + index);
+const charRange = (start, end) => range(start.charCodeAt(0), end.charCodeAt(0)).map(code => String.fromCharCode(code));
+
+window.onload = () => {
+  const container = document.getElementById("container");
+  const createLabel = (name) => {
+    const label = document.createElement("div");
+    label.className = "label";
+    label.textContent = name;
+    container.appendChild(label);
+  }
+  const letters = charRange("A", "J");
+  letters.forEach(createLabel);
+  range(1, 99).forEach(number => {
+     createLabel(number);
+--fcc-editable-region--
+    letters.forEach(letter => {
+     const input = document.createElement("input");
+     input.type = "text";
+     input.id = letter + number;
+
+    })   
+--fcc-editable-region--
+  })
+}
+```
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
index 3cec38aa407..0e32099a903 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
@@ -16,7 +16,7 @@ Now you should be able to roll the dice a few times and see the values update.
 You should call your `updateStats` function inside the `else` clause.
 
 ```js
-assert.match(code, /updateStats\(\)/)
+assert.match(code, /updateStats\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
index 9891353c40e..dc4dfbcd1f2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
@@ -28,7 +28,7 @@ assert.match(code, /const\s+updateRadioOption\s*=\s*\(.*\)\s*=>\s*{\s*[\s\S]*};?
 Your `updateRadioOption` function should take `optionNode` and `score` as parameters.
 
 ```js
-assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\)\s*=>\s*{\s*[\s\S]*};?/)
+assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\s*\)\s*=>\s*{\s*[\s\S]*};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
index 92f575d4869..e37cc5595fd 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
@@ -14,7 +14,7 @@ To enable the radio buttons, you should set the `disabled` property on `scoreInp
 You should assign `false` to `scoreInputs[optionNode].disabled`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.disabled\s*=\s*false/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.disabled\s*=\s*false/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
index e25d3f21ab1..758250f4448 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
@@ -14,7 +14,7 @@ Next, you will need to update the radio button's `value` to the current `score`.
 You should assign the `score` variable to `scoreInputs[optionNode].value`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.value\s*=\s*score/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.value\s*=\s*score/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
index f860755d4bd..f33d18b6662 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
@@ -14,7 +14,7 @@ To display the current score, update the text content for the `span` element nex
 You should set the `textContent` property for `scoreSpans[optionNode]` to the following template literal: `, score = ${score}`.
 
 ```js
-assert.match(code, /scoreSpans\[\s*optionNode\s*\]\.textContent\s*=\s*`, score = \${score}`;?/);
+assert.match(code, /scoreSpans\s*\[\s*optionNode\s*\]\s*\.textContent\s*=\s*`, score = \${score}`;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
index 1a1ce238f5d..400eccf0d2c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
@@ -22,7 +22,7 @@ assert.match(code, /updateRadioOption\(.*\);?/);
 You should have the arguments of `0` and `10` for the `updateRadioOption` function.
 
 ```js
-assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
index c06354cf34a..edb235980d2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
@@ -14,7 +14,7 @@ Now that you have verified the `updateRadioOption` function works, remove the fu
 You should remove the `updateRadioOption` function call from your `else` clause.
 
 ```js
-assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
index 4065d9d9316..f985115c727 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
@@ -18,19 +18,19 @@ Below your `if` statement, include an `else` clause that assigns `1` to `counts[
 You should have an `if` statement with a condition of `counts[num]`.
 
 ```js
-assert.match(code, /if\s*\(\s*counts\[num\]\s*\)/);
+assert.match(code, /if\s*\(\s*counts\s*\[\s*num\s*\]\s*\)/);
 ```
 
 You should use the `++` operator to increment the value of `counts[num]` by `1` inside your `if` statement.
 
 ```js
-assert.match(code, /counts\[num\]\s*\+\s*=\s*1|counts\[num\]\+\+/);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*\+\s*=\s*1|counts\s*\[\s*num\s*\]\s*\+\+/);
 ```
 
 You should assign `1` to `counts[num]` inside your `else` clause.
 
 ```js
-assert.match(code, /else\s*\{\s*counts\[num\]\s*=\s*1\s*;?\s*\}/);
+assert.match(code, /else\s*\{\s*counts\s*\[\s*num\s*\]\s*=\s*1\s*;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
index cc5356022dc..2a3f1e878d9 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
@@ -22,7 +22,7 @@ assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s
 You should assign `counts[num]` to your `count` variable.
 
 ```js
-assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\[num\]\s*;?\s*}/);
+assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\s*\[\s*num\s*\]\s*;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
index f53319dd8d2..f4c6be61af1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
@@ -16,7 +16,7 @@ Now, try rolling the dice again and you should see that the previous score `inpu
 You should call the `resetRadioOption` function inside the `rollDiceBtn` callback function.
 
 ```js
-assert.match(code, /resetRadioOption\(\);?/);
+assert.match(code, /resetRadioOption\(\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
index 1ffeeec8856..18d81ee09dc 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
@@ -22,7 +22,7 @@ assert.isFunction(resetGame);
 You should use arrow syntax for your `resetGame` function.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*}\s*;?/);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
index 297fa6c5004..f5018d5ecbd 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
@@ -24,25 +24,25 @@ assert.match(code, /diceValuesArr\s*=\s*\[\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s
 You should reassign the `score` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `totalScore` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `rolls` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `round` variable to `1`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
index d884ecd60e8..8fbe31cb0fb 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
@@ -14,13 +14,13 @@ To reset each of the dice values to show `0`, apply a `forEach` method to the `l
 You should call the `forEach` method of the `listOfAllDice` variable.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
 ```
 
 For your callback function, you should use `dice` and `index` as parameters.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
index 4cff522d6b9..c8040fcdd58 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
@@ -14,13 +14,13 @@ Inside your callback function, update the `dice` text content by assigning it th
 You should access the `textContent` property of the `dice` parameter.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
 ```
 
 You should assign `diceValuesArr[index]` to `dice.textContent`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
index 31032ac5026..fb0938c65cd 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
@@ -20,25 +20,25 @@ Lastly, update the `currentRoundText` text content by assigning it the `round` v
 You should assign `totalScore` to `totalScoreText.textContent`.
 
 ```js
-assert.match(code, /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
+assert.match(resetGame.toString(), /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
 ```
 
 You should use the `innerHTML` property to set the `scoreHistory` to an empty string.
 
 ```js
-assert.match(code, /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
+assert.match(resetGame.toString(), /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
 ```
 
 You should assign `rolls` to `currentRoundRollsText.textContent`.
 
 ```js
-assert.match(code, /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
+assert.match(resetGame.toString(), /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
 ```
 
 You should assign `round` to `currentRoundText.textContent`.
 
 ```js
-assert.match(code, /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
+assert.match(resetGame.toString(), /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
index 652d9d0663b..185d7489521 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
@@ -16,7 +16,7 @@ Assign the entire result of your `ternary` to `counts[num]`.
 You should assign `counts[num] ? counts[num] + 1 : 1` to `counts[num]` in the `for...of` loop.
 
 ```js
-assert.match(code, /counts\[num\]\s*=\s*counts\[num\]\s*\?\s*counts\[num\]\s*\+\s*1\s*:\s*1\s*;?/s);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*=\s*counts\s*\[\s*num\s*\]\s*\?\s*counts\s*\[\s*num\s*\]\s*\+\s*1\s*:\s*1\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
index 8500a9c0353..89e724f2b90 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasThreeOfAKind\s*=/);
 You should assign `Object.values(counts)` to your `hasThreeOfAKind` variable.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(3)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\)\.includes\(3\)\s*;?/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*3\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
index 195ba652bf2..ad8809cdf97 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasPair\s*=/);
 You should assign `Object.values(counts)` to your `hasPair` variable.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(2)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\)\.includes\(2\)\s*;?/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*2\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
index 0f4c76c723c..7d34c82fa75 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
@@ -36,7 +36,7 @@ assert.match(code, /const\s+sortedNumbersArr\s*=\s*arr\.sort\(.*\);?/);
 Your callback function should use `a` and `b` for the parameters and implicitly return `a - b`.
 
 ```js
-assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(a,\s*b\)\s*=>\s*a\s*-\s*b\s*\));?/);
+assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(\s*a,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\));?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
index 07330191c4b..3c518ac3cfa 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+smallStraightsArr\s*=?\s*;?/);
 You should store the strings `1234`, `2345` and `3456` in an array and assign it to your `smallStraightsArr`.
 
 ```js
-assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\];?/);
+assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
index b391a37f6c1..920b244b3f9 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+largeStraightsArr\s*=?\s*;?/);
 You should store the strings `12345` and `23456` in an array and assign it to your `largeStraightsArr`.
 
 ```js
-assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\];?/);
+assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
index 88be5348b50..0337a7a7170 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `smallStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `3` and `30` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
index af503ce28a0..aea0fbcfeef 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `largeStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `4` and `40` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
index cae7645f18a..4bd72562aa6 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
@@ -16,7 +16,7 @@ Inside the `animate` function, create an `if` statement where the condition chec
 You should have an `if` statement that checks if the right key was pressed and the player's `x` position is less than 400.
 
 ```js
-assert.match(animate.toString(), /keys\.rightKey\.pressed\s*&&\s*player\.position\.x\s*<\s*400/);
+assert.match(animate.toString(), /keys\.rightKey\.(pressed|pressed\s*===\s*true)\s*&&\s*player\.position\.x\s*<\s*400/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
index b08537e33ef..2bc5e567f4f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
@@ -30,7 +30,7 @@ assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*
 You should call the `draw` method on each `platform`.
 
 ```js
-assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\)\s*;?\s*}?\s*\);?/);
+assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\s*\)\s*;?\s*}?\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
index 9f7587a21d9..79eda0fba07 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
@@ -26,7 +26,7 @@ Your callback function should have a `platform` parameter.
 
 ```js
 const splitter = code.split("platform.position.x += 5;")
-assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\);?/);
+assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
index 2f93bab525f..4183273e53c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
@@ -9,17 +9,17 @@ dashedName: step-78
 
 Inside the callback function, create a new `const` variable called `collisionDetectionRules` and assign it an empty array.
 
-Inside that array, add a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+Inside that array, add a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 # --hints--
 
 You should have a `const` variable called `collisionDetectionRules` that is assigned an empty array.
 
 ```js
-assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\];?/);
+assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\s*\]\s*;?/);
 ```
 
-You should have a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+You should have a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 ```js
 assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*player\.position\.y\s*\+\s*player\.height\s*<=\s*platform\.position\.y\s*,?\s*]\s*;?/);
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
index 4bde13df3b4..58abfdfbe35 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
@@ -14,7 +14,7 @@ Inside that array, add a boolean expression that checks if the player's `x` posi
 You should have a boolean expression that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
index be5c847d0e4..6f9308ec65d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
@@ -14,7 +14,7 @@ Below that boolean expression, add another boolean expression that checks if the
 You should have a boolean expression that checks if the player's `x` position is less than or equal to the sum of the platform's `x` position and the platform's width minus one third of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
index 8d05627ce2b..2affd7ae4c1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
@@ -16,21 +16,21 @@ Below that, add another boolean expression that checks if the player's `y` posit
 You should not alter the existing `platformDetectionRules` array and its content.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position plus the player's height is greater than or equal to the platform's `y` position.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position is less than or equal to the sum of the platform's `y` position plus the platform's height.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\]\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
index 436b88a8f29..55173875215 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
@@ -19,21 +19,21 @@ Your `CheckPoint` class should have a `draw` method.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{/);
 ```
 
 Your `draw` method should have a `fillStyle` property.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
 ```
 
 Your `draw` method should have a `fillRect` method.
 
 ```js
 const splitter = code.split('#f1be32')
-assert.match(splitter[1], /ctx\.fillRect\(this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\);?/);
+assert.match(splitter[1], /ctx\.fillRect\(\s*this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
index 0f6aa833af9..ecedd30bbea 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
@@ -25,14 +25,14 @@ assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\([^
 Your callback function should have a `checkpoint` parameter.
 
 ```js
-assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*[^)]*\s*\)\s*;?/);
+assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*[^)]*\s*\)\s*;?/);
 
 ```
 
 You should implicitly return a new `CheckPoint` instance.
 
 ```js
-assert.match(code, /\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
+assert.match(code, /\s*checkpointPositions\.map\s*\(\s*(\(checkpoint\s*\)|checkpoint)\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
index 4c2b75d6d8c..35533919bb2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
@@ -24,13 +24,13 @@ assert.match(code, /\bcheckpoints\b\s*\.\s*forEach\s*\(/s);
 You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*checkpoint\s*=>\s*{/s);
+assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*{?/s);
 ```
 
 You should call the `draw` method on each `checkpoint` inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\.forEach\s*\(\s*checkpoint\s*=>\s*{\s*checkpoint\.draw\(\s*\);?\s*}\s*\);?/s);
+assert.match(code, /\s*checkpoints\.forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*(\{\s*checkpoint\.draw\(\s*\)\s*;?\s*\}|checkpoint\.draw\(\s*\))\s*\)\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
index a470a035eb7..12050701935 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
@@ -24,7 +24,7 @@ You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
 const splitter = code.split("if (keys.rightKey.pressed && isCheckpointCollisionDetectionActive)")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(?checkpoint\)?\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*\{/);
 ```
 
 You should use the subtraction assignment operator to subtract 5 from the `checkpoint`'s `x` position.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
index 69e219ac7dd..373b02e6486 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
@@ -42,7 +42,7 @@ assert.match(code, /\s*setTimeout\s*\(\s*\(\s*\)\s*=>[^,]*,\s*2000\s*\)/s);
 Your callback function should set the `checkpointScreen` `display` property to `none`.
 
 ```js
-assert.match(code, /\s*if\s*\(isCheckpointCollisionDetectionActive\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
+assert.match(code, /\s*if\s*\(\s*isCheckpointCollisionDetectionActive\s*\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
index e9b8c28b3aa..a59debae637 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
@@ -24,7 +24,7 @@ Your callback function should have a `checkpoint` parameter and `index`.
 
 ```js
 const splitter = code.split("player.velocity.y = gravity;")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(checkpoint,\s*index\)\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*\(\s*checkpoint,\s*index\s*\)\s*=>\s*\{/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
index e22063744f2..f7bbbb1edad 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
@@ -14,7 +14,7 @@ Inside the `if` statement, call the `claim` method on the `checkpoint` object.
 You should call the `claim()` method on the `checkpoint` object.
 
 ```js
-assert.match(code, /checkpoint\.claim\(\);?/)
+assert.match(code, /checkpoint\.claim\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
index 917576aaa19..93460e80702 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
@@ -24,7 +24,7 @@ assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\
 You should call the `showCheckpointScreen` function and pass in "You reached the final checkpoint!" as an argument.
 
 ```js
-assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\);?/)
+assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(\s*("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\s*\);?/)
 ```
 
 You should call the `movePlayer` function and pass in the provided arguments.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
index ecd63c0a858..1b89942d767 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
@@ -18,37 +18,37 @@ Begin by accessing the `task-form`, `confirm-close-dialog`, and `open-task-form-
 Du solltest `getElementById()` verwenden, um auf das `task-form`-Element zuzugreifen.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 Du solltest der Variablen `task-form` das `taskForm`-Element zuweisen. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 Du solltest `getElementById()` verwenden, um auf das `confirm-close-dialog`-Element zuzugreifen.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 Du solltest der Variablen `confirm-close-dialog` das `confirmCloseDialog`-Element zuweisen. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 Du solltest `getElementById()` verwenden, um auf das `open-task-form-btn`-Element zuzugreifen.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 Du solltest der Variablen `open-task-form-btn` das `openTaskFormBtn`-Element zuweisen. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
index 157a989e59a..4e5fe287293 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
@@ -14,37 +14,37 @@ You need to access more elements with the `getElementById()` method. This time y
 Du solltest `getElementById()` verwenden, um auf das `close-task-form-btn`-Element zuzugreifen.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 Du solltest das `close-task-form-btn`-Element der Variablen `closeTaskFormBtn` zuweisen. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 Du solltest `getElementById()` verwenden, um auf das `add-or-update-task-btn`-Element zuzugreifen.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 Du solltest das `add-or-update-task-btn`-Element der Variablen `addOrUpdateTaskBtn` zuweisen. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 Du solltest `getElementById()` verwenden, um auf das `cancel-btn`-Element zuzugreifen.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 Du solltest das `cancel-btn`-Element der Variablen `cancelBtn` zuweisen. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
index 657fac0eac9..f0f4cdd3c7b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
@@ -14,37 +14,37 @@ Next, access the `discard-btn`, `tasks-container`, and `title-input` elements us
 Du solltest `getElementById()` verwenden, um auf das `discard-btn`-Element zuzugreifen.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 Du solltest das `discard-btn`-Element der Variablen `discardBtn` zuweisen. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 Du solltest `getElementById()` verwenden, um auf das `tasks-container`-Element zuzugreifen.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 Du solltest das `tasks-container`-Element der Variablen `tasksContainer` zuweisen. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 Du solltest `getElementById()` verwenden, um auf das `title-input`-Element zuzugreifen.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 Du solltest das `title-input`-Element der Variablen `titleInput` zuweisen. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
index 1ecc059ec11..c1155d8ee5f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
@@ -14,25 +14,25 @@ The last set of elements you need to get from the HTML file are the `date-input`
 Du solltest `getElementById()` verwenden, um auf das `date-input`-Element zuzugreifen.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 Du solltest der `dateInput`-Variablen das `date-input`-Element zuweisen. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 Du solltest `getElementById()` verwenden, um auf das `description-input`-Element zuzugreifen.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 Du solltest der `descriptionInput`-Variablen das `description-input`-Element zuweisen. Denke daran, `const` zu verwenden, um die Variable zu deklarieren.
 
 ```js
-assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
index 98e628ce833..92d8a645f93 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
@@ -13,16 +13,40 @@ Use `let` to create a `currentTask` variable and set it to an empty object. Dies
 
 # --hints--
 
-Du solltest eine `taskData`-Konstante erstellen und sie auf ein leeres Array setzen.
+You should have a `const` variable called `taskData`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=/)
 ```
 
-You should use `let` to create an empty `currentTask` object.
+You should assign an array to your `taskData` constant.
 
 ```js
-assert.match(code, /let\s+currentTask\s*=\s*\{\};?/)
+assert.isArray(taskData);
+```
+
+Your `taskData` array should be empty.
+
+```js
+assert.isEmpty(taskData);
+```
+
+You should use `let` to create a `currentTask` variable.
+
+```js
+assert.match(code, /let\s+currentTask/);
+```
+
+You should assign an object to your `currentTask` variable.
+
+```js
+assert.isObject(currentTask);
+```
+
+Your `currentTask` object should be empty.
+
+```js
+assert.isEmpty(currentTask);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
index 8e3651360ba..ed141ed1769 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
@@ -7,9 +7,15 @@ dashedName: step-7
 
 # --description--
 
-Add a `click` event listener to the `closeTaskFormBtn` variable, then use the `showModal()` method on your `confirmCloseDialog` variable. This will display a modal with the `Discard` and `Cancel` buttons.
+The HTML `dialog` element has a `showModal()` method that can be used to display a modal dialog box on a web page.
 
-`showModal()` is a method associated with the HTML `dialog` element. It is used to display a modal dialog box on a web page.
+```js
+dialogElement.showModal();
+```
+
+Add an event listener to the `closeTaskFormBtn` variable and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `showModal()` method on the `confirmCloseDialog` element. This will display a modal with the `Discard` and `Cancel` buttons.
 
 # --hints--
 
@@ -22,13 +28,13 @@ assert.match(code, /closeTaskFormBtn\.addEventListener\(/)
 Dein Ereignis-Listener sollte auf das `click`-Ereignis hören.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `showModal()` method on `confirmCloseDialog`.
+Your event listener's callback function should call the `showModal()` method on the `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1,\s*\(.*\)\s*=>\s*{?\s*confirmCloseDialog\.showModal\(\);?\s*}?\s*\);?/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1,\s*\(.*\)\s*=>\s*(\{\s*confirmCloseDialog\.showModal\(\s*\)\s*;?\s*\}|confirmCloseDialog\.showModal\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
index b3888cf5233..3794d0a9ad9 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
@@ -7,11 +7,15 @@ dashedName: step-8
 
 # --description--
 
-If the user clicks the `Cancel` button, you want to cancel the process (close the modal showing the two buttons) so the user can continue editing.
+If the user clicks the `Cancel` button, you want to cancel the process and close the modal so the user can continue editing. The HTML `dialog` element has a `close()` method that can be used to close a modal dialog box on a web page.
 
-Add a `click` event listener to the `cancelBtn` element, then use the `close()` method on the `confirmCloseDialog` variable.
+```js
+dialogElement.close();
+```
 
-`close()` is a method of the window object you can use to close the current window, or a modal you create with the `dialog` element.
+Add an event listener to the `cancelBtn` element and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `close()` method on the `confirmCloseDialog` element.
 
 # --hints--
 
@@ -24,13 +28,13 @@ assert.match(code, /cancelBtn\.addEventListener\(/)
 Dein Ereignis-Listener sollte auf das `click`-Ereignis hören.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `close()` method on `confirmCloseDialog`. Don't use curly braces.
+Your event listener's callback function should call the `close()` method on `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1\,\s*\(\)\s*\s*=>\s*confirmCloseDialog\.close\(\)\s*\);?/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1\s*\,\s*\(\s*\)\s*=>\s*(\{\s*confirmCloseDialog\.close\(\s*\)\s*;?\s*\}|confirmCloseDialog\.close\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
index ce41a98deca..a2aca609fd7 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
@@ -28,19 +28,19 @@ assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1/)
 You should use arrow syntax to set your event listener to an empty pair of curly braces.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 Your event listener should use the `close()` method on `confirmCloseDialog`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?/)
 ```
 
 Your event listener should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
index 65870169b8a..d0c1568728c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
@@ -22,19 +22,19 @@ assert.match(code, /taskForm\.addEventListener\(/)
 Dein Ereignis-Listener sollte auf das `submit`-Ereignis hören.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1/)
 ```
 
 You should use arrow syntax to set your event listener to an empty pair of curly braces with `e` as the parameter.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
 ```
 
 You should use the `e.preventDefault()` method to stop the browser from reloading the page.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\);?/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
index 47d6d06d880..80236c3a099 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
@@ -35,13 +35,13 @@ assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 You should pass in `item` as the parameter of the arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === currentTask.id`.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
index 09af56bd653..751caf5229e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
@@ -30,19 +30,19 @@ assert.match(code, /const\s+taskObj\s*=\s*\{\s*id/)
 You should use template strings to get `titleInput.value` as the value of your `id` key and convert it to lowercase.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)/)
 ```
 
 You should use `.split(' ')` on `titleInput.value.toLowerCase()`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(('|")\s{1}\1\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)/)
 ```
 
 You should use `.join('-')` on `titleInput.value.toLowerCase().split(' ')`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
index 579c535c68f..e74880ceced 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
@@ -20,13 +20,13 @@ Create an `if` statement with the condition `dataArrIndex === -1`. Within the `i
 You should create an `if` statement with the condition `dataArrIndex === -1`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{/)
 ```
 
 Your `if` statement should have `taskData.unshift(taskObj)` in it's body.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}/)
 ```
 
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
index 9826fa47c55..7ea656a26ea 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
@@ -26,7 +26,7 @@ assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*(\s*\{?\(\s*ta
 You should use addition assignment to set the `innerHTML` of `tasksContainer` to an empty pair of backticks.
 
 ```js
-assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\)?\s*\}?)/)
+assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\s*\)?\s*\}?)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
index 0787d68a770..155076994b4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
@@ -15,7 +15,7 @@ Du solltest `classList` verwenden, um die Klasse `hidden` im `taskForm` umzuscha
 
 ```js
 const splitter = code.split("taskData.forEach")[1].split("});")
-assert.match(splitter[0], /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(splitter[0], /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
index 2a05db5b434..05e107406a3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
@@ -18,13 +18,13 @@ Use arrow syntax to create a `reset` function and set it to a pair of curly brac
 You should use `const` and arrow syntax to create a `reset` function.
 
 ```js
-assert.match(code, /const\s+reset\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+reset\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 Deine `reset`-Funktion sollte leer sein.
 
 ```js
-assert.match(reset.toString(), /\(\)\s*\{\s*\}/);
+assert.match(reset.toString(), /\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
index 7e2e549caac..6af664aa2fc 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
@@ -34,7 +34,7 @@ assert.match(reset.toString(), /descriptionInput\.value\s*=\s*('|")\1;?/)
 You should use `classList` to toggle the class `hidden` on `taskForm`
 
 ```js
-assert.match(reset.toString(), /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(reset.toString(), /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 You should set `currentTask` to an empty object.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
index 4e01822ed46..2e0541b14a7 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the `hidden` class on `taskForm`.
 
 ```js
 const splitter = code.split('<button type="button" class="btn">Delete</button>')
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /reset\(\)/)
+assert.match(code, /reset\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
index b66c1c949b0..1eb4980ed37 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("confirmCloseDialog.close();")
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /confirmCloseDialog\.close\(\);?\s*reset\(\);?/)
+assert.match(code, /confirmCloseDialog\.close\(\s*\);?\s*reset\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
index 046f415d921..fc61d5c9993 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
@@ -16,7 +16,7 @@ Erstelle zunächst innerhalb des `closeTaskFormBtn`-Ereignis-Listeners eine `for
 Du solltest `const` verwenden, um eine `formInputsContainValues`-Variable mit dem Wert `titleInput.value || dateInput.value || descriptionInput.value;` zu erstellen
 
 ```js
-assert.match(code, /const\s+formInputsContainValues\s*=\s*titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value;?/)
+assert.match(code, /const\s+formInputsContainValues\s*=\s*(titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value|titleInput\.value\s*!==\s*null\s*\|\|\s*dateInput\.value\s*!==\s*null\s*\|\|\s*descriptionInput\.value\s*!==\s*null)\;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
index 4581ad6d4fa..cacb944bb9b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
@@ -14,25 +14,25 @@ Create an `if` statement to check if `formInputsContainValues` is true. If `form
 You should create an `if` statement with the condition `formInputsContainValues`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{/)
 ```
 
 The `if` block of your `if` statement should contain `confirmCloseDialog.showModal();`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `reset()` function in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{\s*reset\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{\s*reset\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
index 3363d165bb2..78bfb95196b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
@@ -16,7 +16,7 @@ Use arrow syntax to create an `addOrUpdateTask` function. Then move the `dataArr
 You should use `const` and arrow syntax to create an `addOrUpdateTask` function.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should move the `dataArrIndex` variable into the `addOrUpdateTask` function.
@@ -31,7 +31,7 @@ You should move the `taskObj` object into the `addOrUpdateTask` function.
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?/)
 ```
 
-You should move the `if` statement with the condition `dataArrIndex === 1` into your `addOrUpdateTask` function.
+You should move the `if` statement with the condition `dataArrIndex === -1` into your `addOrUpdateTask` function.
 
 ```js
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s*===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?\s*if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\)\s*;?\s*\}\s*\}\s*;?/)
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
index c37056959d5..ea76d720013 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
@@ -14,13 +14,13 @@ Use arrow syntax to create an `updateTaskContainer` function. Then move the `tas
 You should use `const` and arrow syntax to create a `updateTaskContainer` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 You should move `taskData.forEach()` and its content into the `updateTaskContainer()` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\{\s*id,\s*title,\s*date,\s*description\s*\}\)\s*=>\s*{\s*\(tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\)\s*}\s*\);?\s*\};?/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\s*\{\s*id,\s*title,\s*date,\s*description\s*\}\s*\)\s*=>\s*{\s*\(\s*tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\s*\)\s*}\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
index fd33f2f67fb..cdde0d313e1 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
@@ -14,13 +14,13 @@ Inside the `addOrUpdateTask` function, call the `updateTaskContainer` and `reset
 You should call the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\)\s*/)
+assert.match(code, /updateTaskContainer\(\s*\)\s*/)
 ```
 
 You should call the `reset` function after calling the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\);?\s*reset\(\);?\s*/)
+assert.match(code, /updateTaskContainer\(\s*\);?\s*reset\(\s*\);?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
index b427f1e9dd1..9608d26d428 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
@@ -14,7 +14,7 @@ Now remove the `reset()` call inside the `taskForm` submit event listener and ca
 You should remove `reset()` and call `addOrUpdateTask()`.
 
 ```js
-assert.match(code, /addOrUpdateTask\(\)/)
+assert.match(code, /addOrUpdateTask\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
index afaa870dadf..6908eb26cba 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
@@ -13,16 +13,16 @@ To enable editing and deleting for each task, add an `onclick` attribute to both
 
 # --hints--
 
-You should add `onclick="editTask(this)"` as the first attribute of the edit button.
+You should add `onclick="editTask(this)"` to your edit button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")editTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3\s*>Edit<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')editTask\(\s*this\s*\)\1)[^>]*>Edit<\/button>/);
 ```
 
-You should add `onclick="deleteTask(this)"` as the first attribute of the delete button.
+You should add `onclick="deleteTask(this)"` to your delete button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")deleteTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3>Delete<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')deleteTask\(\s*this\s*\)\1)[^>]*>Delete<\/button>/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
index 4ec4415c981..8c3c0eddb47 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable and set its value using the `findIndex()` metho
 You should not alter the `deleteTask` function.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
index 86dcdf1c5b7..a9414b20061 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
@@ -30,7 +30,7 @@ Use the `remove()` method to remove the `parentElement` of the `buttonEl` from t
 You should use the `remove()` method to remove the parent element of `buttonEl`.
 
 ```js
-assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\);?/)
+assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\s*\);?/)
 ```
 
 You should use `splice()` on the `taskData` array.
@@ -42,13 +42,13 @@ assert.match(deleteTask.toString(), /taskData\.splice\(/)
 The first argument of your `splice()` method should be `dataArrIndex`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex/)
 ```
 
 The second argument of your `splice()` method should be `1`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex,\s*1\);?/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex,\s*1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
index 12f943b50b0..e3256e34282 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable. For its value, utilize the `findIndex()` metho
 You should not alter the `editTask` function.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
index e502ac9784d..6bb3020b119 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
@@ -14,7 +14,7 @@ Use square bracket notation to retrieve the task to be edited from the `taskData
 You should assign `taskData[dataArrIndex]` to `currentTask`.
 
 ```js
-assert.match(code, /currentTask\s*=\s*taskData\[dataArrIndex\];?/)
+assert.match(code, /currentTask\s*=\s*taskData\s*\[\s*dataArrIndex\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
index e666d1ba889..00b33629a9c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
@@ -14,13 +14,13 @@ At this point, editing a task won't reflect when you submit the task. To make th
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 Your `else` block should have the code `taskData[dataArrIndex] = taskObj`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*taskData\[dataArrIndex\]\s*=\s*taskObj;?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*taskData\s*\[\s*dataArrIndex\s*\]\s*=\s*taskObj;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
index 7b81707a101..f5cae09f8a5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
@@ -26,13 +26,13 @@ After that, open your browser console and go to the `Applications` tab, select `
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 Your `localStorage.setItem()` should have a value of `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*myTaskArr\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*myTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
index 3b7d411b0cb..bf9f45e1abf 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
@@ -16,13 +16,13 @@ To resolve the issue, wrap the data you're saving in the `JSON.stringify()` meth
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 You should wrap `JSON.stringify()` around `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*JSON\.stringify\(myTaskArr\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*JSON\.stringify\(\s*myTaskArr\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
index eb7edbc5c32..ac7c7cabad5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
@@ -16,13 +16,13 @@ Use the `getItem()` method to retrieve the `myTaskArr` array and assign it to th
 You should use `const` to create a `getTaskArr` variable and assign `localStorage.getItem("data")` to it.
 
 ```js
-assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(('|")data\1\);?/)
+assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\1\s*\);?/)
 ```
 
 You should log the `getTaskArr` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArr\);?/)
+assert.match(code, /console\.log\(\s*getTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
index b98ee02e65c..ce6f51a8f8c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
@@ -18,13 +18,13 @@ Check the console to see the difference between `getTaskArr` and `getTaskObj`.
 You should use `const` to create a `getTaskArrObj` variable and assign it to `JSON.parse(localStorage.getItem('data'));`.
 
 ```js
-assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\);?/)
+assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\);?/)
 ```
 
 You should log the `getTaskArrObj` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArrObj\);?/)
+assert.match(code, /console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
index 37b3424ceb5..93ce50725a4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
@@ -16,7 +16,7 @@ Remove the `data` item from local storage and open the console to observe the re
 You should use `localStorage.removeItem()` to remove the `data` item from the browser's local storage.
 
 ```js
-assert.match(code, /localStorage\.removeItem\(('|")data\1\);?/)
+assert.match(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
index 78407589f44..896a7555c42 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
@@ -16,13 +16,13 @@ Remove `localStorage.removeItem()` and use `localStorage.clear()` instead. You d
 You should remove `localStorage.removeItem("data")`.
 
 ```js
-assert.notMatch(code, /localStorage\.removeItem\(('|")data\1\);/)
+assert.notMatch(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);/)
 ```
 
 You should remove everything from the browser `local storage` with `localStorage.clear()`.
 
 ```js
-assert.match(code, /localStorage\.clear\(\);?/)
+assert.match(code, /localStorage\.clear\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
index 732faf34e24..13c9d13a0e3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
@@ -14,7 +14,7 @@ Remove the `myTaskArr` array and all of the code for `localStorage` because you
 You should remove `myTaskArr` and all the code related to `localStorage` that you've just learned.
 
 ```js
-assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s"Walk\s*the\s*Dog",\s*date:\s*"22-04-2022"\s*\},\s*\{\s*task:\s"Read\s*some\s*books",\s*date:\s*"02-11-2023"\s*\},\s*\{\s*task:\s"Watch\s*football",\s*date:\s*"10-08-2021"\s*\},\s*\];?\s*localStorage\.setItem\("data", JSON\.stringify\(myTaskArr\)\);\s*localStorage\.clear\(\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\("data"\)\s*console\.log\(getTaskArr\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\("data"\)\);?\s*console\.log\(getTaskArrObj\);?/)
+assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s('|")Walk\s*the\s*Dog\1,\s*date:\s*('|")22-04-2022\2\s*\},\s*\{\s*task:\s('|")Read\s*some\s*books\3,\s*date:\s*('|")02-11-2023\4\s*\},\s*\{\s*task:\s('|")Watch\s*football\5,\s*date:\s*('|")10-08-2021\6\s*\},\s*\]\s*;?\s*localStorage\.setItem\(('|")data\7, JSON\.stringify\(\s*myTaskArr\s*\)\s*\);\s*localStorage\.clear\(\s*\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\8\s*\)\s*console\.log\(\s*getTaskArr\s*\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\9\s*\)\s*\);?\s*console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
@@ -316,7 +316,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -346,7 +346,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
index 83b71776d3f..6d642dd6c3b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
@@ -24,13 +24,13 @@ assert.match(code, /localStorage\.setItem\(/)
 You should pass in `"data"` as the first argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
index b0cda0b49a0..f06562d9c04 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
@@ -24,14 +24,14 @@ You should pass in `"data"` as the first argument of your `localStorage.setItem(
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
index a0c85f302fb..3df9111e8d6 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
@@ -16,7 +16,7 @@ Set `taskData` to the retrieval of `data` from local storage **or** an empty arr
 You should set the `taskData` variable to `JSON.parse(localStorage.getItem("data")) || [];`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\)\s*\|\|\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\)\s*\|\|\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -321,7 +321,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -352,7 +352,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
index 6185fd746fe..5b1ffc38ba7 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
@@ -20,13 +20,13 @@ With that, you've completed this project.
 You should create an `if` statement with `(taskData.length)` as the condition. As a reminder, `0` is a falsy value.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*/)
 ```
 
 You should call the `updateTaskContainer` function in your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*updateTaskContainer\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*updateTaskContainer\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
index 2e444385a9c..a109fd566fd 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
@@ -20,7 +20,7 @@ console.log(Date.now()); // 1628586800000
 You should attach `-${Date.now()}` to the existing value of the `id` key. Don't forget it needs to be inside the template string.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
index 178a20bf74e..f21fcdc5ab2 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
@@ -1,32 +1,18 @@
 ---
 id: 63e02a333354343b595d64ca
-title: Schritt 16
+title: Step 15
 challengeType: 0
-dashedName: step-16
+dashedName: step-15
 ---
 
 # --description--
 
-Now that you have tested the `Object.freeze()` method, you can delete those two lines of code from the last lesson.
-
 The next step is to access the key called `sport` from the `myFavoriteFootballTeam` object and assign it to a new `const` variable called `sport`.
 
 Remember you can use dot notation for this.
 
 # --hints--
 
-You should remove your assignment of the `USA` string to `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /myFavoriteFootballTeam\.team\s*=\s*('|"|`)USA\1\s*/);
-```
-
-You should remove your `console.log` for `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /console\.log\(\s*myFavoriteFootballTeam\.team\s*\)/);
-```
-
 You should use `const` to declare a `sport` variable.
 
 ```js
@@ -462,8 +448,6 @@ Object.freeze(myFavoriteFootballTeam);
 
 --fcc-editable-region--
 
-myFavoriteFootballTeam.team = "USA";
-console.log(myFavoriteFootballTeam.team);
 
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
index a9e9832ad38..d9520c64e56 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
@@ -1,8 +1,8 @@
 ---
 id: 63e0334b7a24bd3c96aca4de
-title: Schritt 17
+title: Step 16
 challengeType: 0
-dashedName: step-17
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
index bbc8efbf44e..e556c5c05e3 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e036373fc9173d284e165a
-title: Schritt 18
+title: Step 17
 challengeType: 0
-dashedName: step-18
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
index dccb9a25205..2a8ea3b0d0b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
@@ -1,8 +1,8 @@
 ---
 id: 63e03b86008bbb3e1c3de846
-title: Schritt 19
+title: Step 18
 challengeType: 0
-dashedName: step-19
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
index 07cb82e16b5..32ae955337d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
@@ -1,8 +1,8 @@
 ---
 id: 63e042661ad2663f0d468740
-title: Schritt 20
+title: Step 19
 challengeType: 0
-dashedName: step-20
+dashedName: step-19
 ---
 
 # --description--
@@ -15,7 +15,7 @@ Use object destructuring to access the `coachName` value.
 
 ```js
 
-assert.match(code, /const\s*{\s*coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach\s*/)
+assert.match(code, /const\s*{\s*(coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach|headCoach\s*:\s*{\s*coachName\s*}\s*}\s*=\s*myFavoriteFootballTeam)\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
index 255a54fe2bf..ed536a4b70e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
@@ -1,8 +1,8 @@
 ---
 id: 63e050bf935ac341b88326d6
-title: Schritt 21
+title: Step 20
 challengeType: 0
-dashedName: step-21
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
index 03ed131c80f..3562608e3f9 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05557016dfd45ea49152c
-title: Schritt 22
+title: Step 21
 challengeType: 0
-dashedName: step-22
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
index a51d1b4b387..70772e4cba9 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05c00b615bb46ac87273a
-title: Schritt 23
+title: Step 22
 challengeType: 0
-dashedName: step-23
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
index d9d1dbafc67..862d6c0fd77 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
@@ -1,8 +1,8 @@
 ---
 id: 63e060df21bca347b2d2b374
-title: Schritt 24
+title: Step 23
 challengeType: 0
-dashedName: step-24
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
index 5ed1e15a5b4..5ea194d88aa 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e062d6090ebb486a4eda3a
-title: Schritt 25
+title: Step 24
 challengeType: 0
-dashedName: step-25
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
index 17a96f7d90d..5cd7ea1d6e4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
@@ -1,8 +1,8 @@
 ---
 id: 63e949b8327aa2aca2ca8eac
-title: Schritt 26
+title: Step 25
 challengeType: 0
-dashedName: step-26
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
index 3d4f1fcd90f..b13000896fc 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
@@ -1,8 +1,8 @@
 ---
 id: 63e94dae6dcedbad73f2f6ee
-title: Schritt 27
+title: Step 26
 challengeType: 0
-dashedName: step-27
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
index d9fcef37bd0..dbeb80c7a4c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
@@ -1,8 +1,8 @@
 ---
 id: 63e954321b0a77ae4f6d9650
-title: Schritt 28
+title: Step 27
 challengeType: 0
-dashedName: step-28
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
index 1b37591fb03..3912e0e6228 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95a45dce95baf41dd4f78
-title: Schritt 29
+title: Step 28
 challengeType: 0
-dashedName: step-29
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
index c0c4594385a..9a21ae45f28 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95e39860dc5b01ebe9be0
-title: Schritt 30
+title: Step 29
 challengeType: 0
-dashedName: step-30
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
index 21aa06b3281..e037852b3bc 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9667c881b61b1e338d276
-title: Schritt 31
+title: Step 30
 challengeType: 0
-dashedName: step-31
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
index 6c06ffdb382..20e68b6415e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96938d2a347b2734a1587
-title: Schritt 32
+title: Step 31
 challengeType: 0
-dashedName: step-32
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
index 4fe09eb9fac..eb225b3116c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96eb94c97b6b31ee50f63
-title: Schritt 33
+title: Step 32
 challengeType: 0
-dashedName: step-33
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
index 852619c935f..401f8fcb289 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9718d7d490bb3940d5a0a
-title: Schritt 34
+title: Step 33
 challengeType: 0
-dashedName: step-34
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
index b930691469e..e2cf0d8bbea 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9737f686c76b4078a60f4
-title: Schritt 35
+title: Step 34
 challengeType: 0
-dashedName: step-35
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
index 2930af083cc..0544b4bdd11 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28972973504e7bb58b0b3
-title: Schritt 36
+title: Step 35
 challengeType: 0
-dashedName: step-36
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
index e1399fdfd4b..91426574c6f 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28ef082d771e8bf71f94a
-title: Schritt 37
+title: Step 36
 challengeType: 0
-dashedName: step-37
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
index e9b25ac9dff..9ad6aab3caa 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
@@ -1,8 +1,8 @@
 ---
 id: 63f293c804d6f9e9a83ca4c5
-title: Schritt 38
+title: Step 37
 challengeType: 0
-dashedName: step-38
+dashedName: step-37
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Open the console, and make a selection from the teammates dropdown menu. You sho
 You should add a `console.log` with the value of `e.target.value`.
 
 ```js
-assert.match(code, /console\.log\s*\(e\.target\.value\)\s*/)
+assert.match(code, /console\.log\s*\(\s*e\.target\.value\s*\)\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
index 952af3229dc..f95cf6e5d4b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29804e3ec00ea6fab1ec4
-title: Schritt 39
+title: Step 38
 challengeType: 0
-dashedName: step-39
+dashedName: step-38
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Inside the callback function, access the `innerHTML` property of the `playerCard
 You should not have the `console.log` statement in your code.
 
 ```js
-assert.notMatch(code, /\s*console\.log\(e\.target\.value\)/);
+assert.notMatch(code, /\s*console\.log\(\s*e\.target\.value\s*\)/);
 ```
 
 You should access the `innerHTML` property of the `playerCards` element.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
index e5cf5faf770..134d1331364 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29ce62aea65eb041758c8
-title: Schritt 40
+title: Step 39
 challengeType: 0
-dashedName: step-40
+dashedName: step-39
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /switch\s*\(\s*e\.target\.value\s*\)/);
 Your `switch` statement should be empty.
 
 ```js
-assert.match(code, /\s*switch\s*\(e\.target\.value\)\s*{\s*}/);
+assert.match(code, /\s*switch\s*\(\s*e\.target\.value\s*\)\s*{\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
index 0b00a0c2a0b..a3caf074b5c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a0a860790eebe61bf908
-title: Schritt 41
+title: Step 40
 challengeType: 0
-dashedName: step-41
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
index b98eed579e2..303dace84dc 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a4a8087e6dec8ec47f16
-title: Schritt 44
+title: Step 43
 challengeType: 0
-dashedName: step-44
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
index 342922d30f6..a6d1e38a3af 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a5f09a785aed155c0a56
-title: Schritt 45
+title: Step 44
 challengeType: 0
-dashedName: step-45
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
index 6babcf135e2..f6cb13c7bc5 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a8e14fb388edd3242527
-title: Schritt 46
+title: Step 45
 challengeType: 0
-dashedName: step-46
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
index d663a91e604..3ff1f2396c8 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2aa36fcdc63ee4e18fc37
-title: Schritt 47
+title: Step 46
 challengeType: 0
-dashedName: step-47
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
index f16d2df135e..0543e8d3b98 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2ab4f6c52c5eec6d68de4
-title: Schritt 48
+title: Step 47
 challengeType: 0
-dashedName: step-48
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
index a3080e6f1b2..6cd48c0e9a8 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
@@ -1,8 +1,8 @@
 ---
 id: 641fc88d8fa7127f76e0324f
-title: Schritt 42
+title: Step 41
 challengeType: 0
-dashedName: step-42
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
index 5b3cc8f6c54..11c8298ac82 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
@@ -1,8 +1,8 @@
 ---
 id: 641fcfd468185384ac218b7d
-title: Schritt 43
+title: Step 42
 challengeType: 0
-dashedName: step-43
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
index e1b833d9198..a99f64e7e69 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-After alerting the user if the number input is empty of the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
+After alerting the user if the number input is empty or the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
 
 Add the `return` keyword after `alert()`.
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
index 2881a0088c9..81708bb9af7 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
@@ -24,7 +24,6 @@ Use the `.reverse()` method to reverse the order of the `remainders` array, and
 You should use the `.reverse()` method on the `remainders` array.
 
 ```js
-console.log(String(decimalToBinary))
 assert.match(String(decimalToBinary), /remainders\.reverse\(\s*\)/);
 ```
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
index 3bf5a964e0a..e3c9325230d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
@@ -31,7 +31,7 @@ assert.notMatch(String(decimalToBinary), /else\s+if\s*\([\s\S]+\)/);
 Your `decimalToBinary()` function should have an `if` statement that checks if `input` is equal to `0` or `1`.
 
 ```js
-assert.match(String(decimalToBinary), /if\s*\(input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
+assert.match(String(decimalToBinary), /if\s*\(\s*input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(\s*input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
 ```
 
 If input is equal to `0` or `1`, your `decimalToBinary()` function should return `String(input)`.
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
index 8c2212ad694..0e1d652819c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
@@ -44,7 +44,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1000` as the second argument to the `setTimeout` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
index 085517db71b..3671ac79a3a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
@@ -48,7 +48,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
index 490e583649b..26eb640cc7c 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
@@ -46,7 +46,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
index d5b7b667c2d..27bc5939a43 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the `id` attribute to the `inputVal`
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
index aa687f14d66..4160f960c05 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the text of the paragraph element to
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
index 332c21e9500..2db45bdf177 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `showMsgDelay` property of the c
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)showMsgDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)showMsgDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
index e84e3110ba4..1cc8d3ecf73 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
@@ -18,7 +18,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
index 0b1a0f77c82..9732d8a1cf4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
@@ -27,7 +27,7 @@ You should set the `textContent` property of the targeted element equal to the `
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\[\s*('|"|`)\s*msg\s*\1\s*\]/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\s*\[\s*('|"|`)\s*msg\s*\1\s*\]/
 );
 ```
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
index 768eba12321..4f2eb4a9a83 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `removeElDelay` property of the
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)removeElDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)removeElDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
index 00dfcb0215c..004281dff6a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
@@ -16,7 +16,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.lengthOf(
   String(showAnimation).match(
-    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
+    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
   ),
   2
 );
@@ -27,7 +27,7 @@ You should chain the `.remove()` method to the `.getElementById()` method.
 ```js
 assert.match(
   String(showAnimation),
-  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
+  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
 );
 ```
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
index fadf465ad02..5eb1f960c68 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
@@ -18,7 +18,7 @@ You should set the `textContent` property of `result` equal to calling `decimalT
 ```js
 assert.match(
   String(showAnimation),
-  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\[('|"|`)textContent\1\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
+  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\s*\[\s*('|"|`)textContent\1\s*\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
 );
 ```
 
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
index e4f7b71ba59..ce9a62d0351 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
@@ -9,9 +9,9 @@ dashedName: step-5
 
 Back in your event listener, you need to update the text of the `result` element.
 
-Use a ternary operator to update the text of the `result` element after the `if` statement. Check the truthiness of calling `isSpam()` on the value of the `messageInput` element. If true, set the text to `Oh no! This looks like a spam message.`. Andernfalls wird der Text auf `This message does not seem to contain any spam.` gesetzt
+After the `if` statement, use a ternary operator to check the truthiness of calling `isSpam()` with `messageInput.value` as the argument. If true, set the `textContent` property on the `result` element to `Oh no! This looks like a spam message.`. Otherwise, set it to `This message does not seem to contain any spam.`
 
-Setze dann den Wert des `messageInput`-Elements auf einen leeren String.
+Then set the `messageInput` element's `value` property to an empty string.
 
 # --hints--
 
@@ -21,10 +21,10 @@ You should use the assignment operator to set the `textContent` property of the
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*/)
 ```
 
-You should assign the `isSpam()` function call to `result.textContent`.
+You should call the `isSpam()` function after the assignment operator `=` and before the `?` ternary operator.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(.*\)\s*\?/)
 ```
 
 You should use ternary syntax to check the truthiness of `isSpam(messageInput.value)`.
@@ -45,10 +45,10 @@ The falsy expression of your ternary should set the `textContent` property of th
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*/);
 ```
 
-After your ternary, set the `value` of `messageInput` to an empty string.
+After your ternary, set the `value` property on the `messageInput` element to an empty string.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5\s*;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
index c8bedf3010f..c1a537dc223 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
@@ -24,13 +24,13 @@ assert.match(code, /const\s+currentDateParagraph\s+=/);
 You should use `document.getElementById()` to get the `#current-date` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)current-date\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)current-date\1\s*\)/);
 ```
 
 You should assign the `#current-date` element to your `currentDateParagraph` variable.
 
 ```js
-assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(('|"|`)current-date\1\)/g));
+assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(\s*('|"|`)current-date\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
index 3295a750daa..47c15587f56 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+dateOptionsSelectElement\s+=/);
 You should use `document.getElementById()` to get the `#date-options` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)date-options\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)date-options\1\s*\)/);
 ```
 
 You should assign the `#date-options` element to your `dateOptionsSelectElement` variable.
 
 ```js
-assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(('|"|`)date-options\1\)/g));
+assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(\s*('|"|`)date-options\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
index 788fae024c1..7a064099cb4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
@@ -32,7 +32,7 @@ assert.match(code, /const\s+date\s+=/);
 You should assign a `Date` object to your `date` variable with `new Date()`.
 
 ```js
-assert(code.match(/const\s+date\s+=\s+new\s+Date\(\)/g));
+assert(code.match(/const\s+date\s+=\s+new\s+Date\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
index 4fa72cc6a02..9e8da0034f4 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
@@ -30,7 +30,7 @@ assert.match(code, /const\s+day\s+=/);
 You should assign the `date.getDate()` to your `day` variable.
 
 ```js
-assert(code.match(/const\s+day\s+=\s+date\.getDate\(\)/g));
+assert(code.match(/const\s+day\s+=\s+date\.getDate\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
index 856addb1fea..f29a6c67f7a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+month\s+=/);
 You should assign the `date.getMonth() + 1` to your `month` variable.
 
 ```js
-assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\)\s*\+\s*1/g));
+assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\s*\)\s*\+\s*1/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
index 36542963348..b2d4d8ec05a 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+year\s+=/);
 You should assign the `date.getFullYear()` to your `year` variable.
 
 ```js
-assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\)/g));
+assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
index b43a24cadcf..ee5b17ed5f6 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+hours\s+=/);
 You should assign the `date.getHours()` to your `hours` variable.
 
 ```js
-assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\)/g));
+assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
index a48315193cd..5bdd824a5bb 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+minutes\s+=/);
 You should assign the `date.getMinutes()` to your `minutes` variable.
 
 ```js
-assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\)/g));
+assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
index b2eaac290cd..d8a57108d7e 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
@@ -16,7 +16,7 @@ Open up the console and you should see the date printed out.
 You should have a `console.log(formattedDate)` line in your code.
 
 ```js
-assert.match(code, /console\.log\(formattedDate\)/);
+assert.match(code, /console\.log\(\s*formattedDate\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
index 3ea8c49afc6..c58dd15c858 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
@@ -22,7 +22,7 @@ assert(code.match(/currentDateParagraph\.textContent\s*=\s*formattedDate/g));
 You should not have a `console.log(formattedDate);` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(formattedDate\);/);
+assert.notMatch(code, /console\.log\(\s*formattedDate\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
index dbb258e4069..da96053247d 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
@@ -15,11 +15,17 @@ element.addEventListener("change", () => {
 });
 ```
 
-Chain the `addEventListener` method to `dateOptionsSelectElement` where the first argument is `change` and the second argument is an empty arrow function.
+Attach the `addEventListener` method to the `dateOptionsSelectElement`. The first argument of the event listener should be the string `change` and the second argument should be an empty arrow function.
 
 # --hints--
 
-You should use the `addEventListener` method to add a `change` event listener to `dateOptionsSelectElement`.
+You should attach the `addEventListener` method to the `dateOptionsSelectElement`.
+
+```js
+assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(/g));
+```
+
+Your event listener should listen for a `change` event.
 
 ```js
 assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(\s*('|")change\1/g));
diff --git a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
index 873ad4fd565..5c64acf390b 100644
--- a/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
+++ b/curriculum/challenges/german/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
@@ -22,7 +22,7 @@ Chain the `.reverse()` method to the end of `.split()` method.
 You should use the `.reverse()` method to reverse the order of the array returned by `.split()`.
 
 ```js
-assert(code.match(/\.reverse\(\)/g));
+assert(code.match(/\.reverse\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/german/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md b/curriculum/challenges/german/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
index a721563d96d..1f1a60542e3 100644
--- a/curriculum/challenges/german/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
+++ b/curriculum/challenges/german/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
@@ -109,7 +109,6 @@ assert(getCorrectStyle()?.textAlign === 'center');
 # --seed--
 
 ## --seed-contents--
-
 ```css
 ```
 
diff --git a/curriculum/challenges/german/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md b/curriculum/challenges/german/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
index 6480354b9f3..cf7e94d0967 100644
--- a/curriculum/challenges/german/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
+++ b/curriculum/challenges/german/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
@@ -29,4 +29,4 @@ They are outdated technologies.
 
 ## --video-solution--
 
-1
+2
diff --git a/curriculum/challenges/german/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md b/curriculum/challenges/german/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
index 37f2460f3d4..c734f3afcd5 100644
--- a/curriculum/challenges/german/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
+++ b/curriculum/challenges/german/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
@@ -1,5 +1,5 @@
 ---
-id: 657e0d0037192f3d9e3d5417 
+id: 657e0d0037192f3d9e3d5417
 title: Task 128
 challengeType: 22
 dashedName: task-128
diff --git a/curriculum/challenges/german/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md b/curriculum/challenges/german/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
index 661852097ef..1dc5baaa680 100644
--- a/curriculum/challenges/german/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
+++ b/curriculum/challenges/german/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
@@ -13,7 +13,7 @@ Bob: Alright, team. This is Alice's first day with _ , so please let _ introduce
 -->
 # --description--
 
-You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sould more natural. Listen for the object pronouns Bob uses in this audio.
+You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sound more natural. Listen for the object pronouns Bob uses in this audio.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/german/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md b/curriculum/challenges/german/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
index ba047419257..62c5a066704 100644
--- a/curriculum/challenges/german/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
+++ b/curriculum/challenges/german/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
@@ -26,13 +26,13 @@ Es folgt der Algorithmus:
   <li>Seed the RNG with the number of the deal.
   </li><li>Erstelle einen Array von 52 Karten: Kreuz-Ass, Karo-Ass, Herz-Ass, Pik-Ass, Kreuz-2, Karo-2, und so weiter durch die Ränge: Ass, 2, 3, 4, 5, 6, 7, 8, 9, 10, Bube, Königin, König. Die Array-Indizes sind 0 bis 51, wobei das Kreuz-Ass auf 0 und der Pik-König auf 51 steht.</li>
   <li>Bis das Array leer ist:</li>
-  <li>Wähle eine zufällige Karte mit dem Index ≡ nächste Zufallszahl (mod array length).</li>
     <ul>
+      <li>Choose a random card at <i>index</i> ≡ <i>next random number</i> (mod <i>array length</i>).</li>
       <li>Swap this random card with the last card of the array.</li>
-      <li>Entferne diese zufällige Karte aus dem Feld. (Array-Länge wird um 1 heruntergesetzt)</li>
-      <li>Gib diese zufällige Karte aus.</li>
+      <li>Remove this random card from the array. (Array length goes down by 1.)</li>
+      <li>Deal this random card.</li>
     </ul>
-  <li>Gib alle 52 Karten aufgedeckt in 8 Spalten aus. Die ersten 8 Karten kommen in 8 Spalten, die nächsten 8 Karten kommen auf die ersten 8 Karten und so weiter.</li>
+  <li>Deal all 52 cards, face up, across 8 columns. The first 8 cards go in 8 columns, the next 8 cards go on the first 8 cards, and so on.</li>
 </ol>
 
 **Beispiel:**
diff --git a/curriculum/challenges/german/22-rosetta-code/rosetta-code-challenges/execute-brain.md b/curriculum/challenges/german/22-rosetta-code/rosetta-code-challenges/execute-brain.md
index 46a2147ea3b..62a7d597284 100644
--- a/curriculum/challenges/german/22-rosetta-code/rosetta-code-challenges/execute-brain.md
+++ b/curriculum/challenges/german/22-rosetta-code/rosetta-code-challenges/execute-brain.md
@@ -1,6 +1,6 @@
 ---
 id: 59e0a8df964e4540d5abe599
-title: Brain**** ausführen
+title: Execute Brain****
 challengeType: 1
 forumTopicId: 302261
 dashedName: execute-brain
@@ -10,28 +10,28 @@ dashedName: execute-brain
 
 Write a function to implement a Brain\*\*\*\* interpreter. The function will take a string as a parameter and should return a string as the output. More details are given below:
 
-RCBF ist eine Menge von <a href="https://rosettacode.org/wiki/Brainf***" target="_blank" rel="noopener noreferrer nofollow">Brainf\*\*\*</a> Übersetzer und Interpeter, die für Rosetta Code in einer Vielzahl von Sprachen geschrieben wurde.
+RCBF is a set of <a href="https://rosettacode.org/wiki/Brainf***" target="_blank" rel="noopener noreferrer nofollow">Brainf\*\*\*</a> compilers and interpreters written for Rosetta Code in a variety of languages.
 
-Unten findst du Links zu jeden Versionen von RCBF.
+Below are links to each of the versions of RCBF.
 
-Eine Implementierung muss lediglich die folgenden Anweisungen ordnungsgemäß implementieren:
+An implementation need only properly implement the following instructions:
 
-| Command                   | Beschreibung                                                                                   |
-| ------------------------- | ---------------------------------------------------------------------------------------------- |
-| <code>></code> | Move the pointer to the right                                                                  |
-| <code>&lt;</code> | Bewege den Zeiger nach links                                                                   |
-| <code>+</code> | Erhöhe die Speicherzelle des Zeigers                                                           |
-| <code>-</code> | Verringere die Speicherzelle des Zeigers                                                       |
-| <code>.</code> | Gebe das der Zelle zugehörige Zeichen am Zeiger aus                                            |
-| <code>,</code> | Übergebe und speichere ein Zeichen in der Zelle des Zeigers                                    |
-| <code>\[</code> | Überspringe das jeweilige <code>]</code>, wenn Zelle des Zeigers 0 ist               |
-| <code>]</code> | Springe zum jeweiligen <code>[</code> zurück, wenn Zelle des Zeigers ein nonzero ist |
+| Command           | Description                                                                        |
+| ----------------- | ---------------------------------------------------------------------------------- |
+| <code>></code>    | Move the pointer to the right                                                      |
+| <code>&lt;</code> | Move the pointer to the left                                                       |
+| <code>+</code>    | Increment the memory cell under the pointer                                        |
+| <code>-</code>    | Decrement the memory cell under the pointer                                        |
+| <code>.</code>    | Output the character signified by the cell at the pointer                          |
+| <code>,</code>    | Input a character and store it in the cell at the pointer                          |
+| <code>\[</code>   | Jump past the matching <code>]</code> if the cell under the pointer is 0           |
+| <code>]</code>    | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
 
-Jede Zellgröße ist erlaubt, EOF-Unterstützung (*E*nd-*O**F*ile – Ende der Datei) ist optional, je nachdem, ob es eine Speicherbegrenzung gibt.
+Any cell size is allowed, EOF (*E*nd-*O*-*F*ile) support is optional, as is whether you have bounded or unbounded memory.
 
 # --hints--
 
-`brain(bye)` sollte einen String zurückgeben
+`brain(bye)` should return a string
 
 ```js
 assert(typeof brain(bye) === 'string');
@@ -43,19 +43,19 @@ assert(typeof brain(bye) === 'string');
 assert.equal(brain('++++++[>++++++++++<-]>+++++.'), 'A');
 ```
 
-`brain(bye)` sollte `Goodbye, World!\r\n` zurückgeben
+`brain(bye)` should return `Goodbye, World!\r\n`
 
 ```js
 assert.equal(brain(bye), 'Goodbye, World!\r\n');
 ```
 
-`brain(hello)` sollte `Hello World!\n` zurückgeben
+`brain(hello)` should return `Hello World!\n`
 
 ```js
 assert.equal(brain(hello), 'Hello World!\n');
 ```
 
-`brain(fib)` sollte `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89` zurückgeben
+`brain(fib)` should return `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89`
 
 ```js
 assert.equal(brain(fib), '1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89');
diff --git a/curriculum/challenges/italian/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md b/curriculum/challenges/italian/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
index 65b378f9aa8..0a7f1a378f2 100644
--- a/curriculum/challenges/italian/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
+++ b/curriculum/challenges/italian/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
@@ -22,7 +22,8 @@ Completa la funzione usando le regole sottostanti per modificare l'oggetto passa
 -   La funzione deve sempre restituire l'intero oggetto `records`.
 -   Se `value` è una stringa vuota, elimina la proprietà `prop` dall'album.
 -   Se `prop` non è `tracks` e `value` non è una stringa vuota, assegna `value` alla `prop` di quell'album.
--   Se `prop` è `tracks` e `value` non è una stringa vuota, devi aggiornare l'array `tracks` dell'album. Prima di tutto, se l'album non ha una proprietà `tracks`, assegnale un array vuoto. Quindi aggiungi `value` come ultimo elemento nell'array `tracks` dell'album.
+-   If `prop` is `tracks` and `value` isn't an empty string, but the album doesn't have a `tracks` property, create an empty array and add `value` to it.
+-   If prop is `tracks` and `value` isn't an empty string, add `value` to the end of the album's existing `tracks` array.
 
 **Nota:** una copia dell'oggetto `recordCollection` viene utilizzata per i test. Non dovresti modificare direttamente l'oggetto `recordCollection`.
 
diff --git a/curriculum/challenges/italian/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md b/curriculum/challenges/italian/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
index 769045ae519..d6e131b23ec 100644
--- a/curriculum/challenges/italian/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
+++ b/curriculum/challenges/italian/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
@@ -8,7 +8,7 @@ dashedName: serialization-of-a-user-object
 
 # --description--
 
-La serializzazione e la deserializzazione sono concetti importanti per quanto riguarda l'autenticazione. Serializzare un oggetto significa convertire il suo contenuto in una piccola *chiave* (key) che può essere deserializzata nell'oggetto originale. Questo ci permette di sapere chi ha comunicato con il server senza dover inviare i dati di autenticazione, come il nome utente e la password, ad ogni richiesta di una nuova pagina.
+Serialization and deserialization are important concepts in regard to authentication. Serializzare un oggetto significa convertire il suo contenuto in una piccola *chiave* (key) che può essere deserializzata nell'oggetto originale. Questo ci permette di sapere chi ha comunicato con il server senza dover inviare i dati di autenticazione, come il nome utente e la password, ad ogni richiesta di una nuova pagina.
 
 Per una configurazione corretta, devi avere una funzione di serializzazione e una funzione di deserializzazione. In Passport, possono essere create con:
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
index e7bd4b50336..c18bf7f6142 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
@@ -19,8 +19,8 @@ You should use the `append()` method to append `start` to `paths[start]`.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\.append\s*\(\s*start\s*\)/m));
+    const {function_body} = shortest;
+    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\s*\.append\s*\(\s*start\s*\)/m));
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
index 3fca449529c..bb8994cb4b9 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
@@ -27,8 +27,8 @@ You should call `extend()` on the neighbour node path passing the current node p
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
index aa6acacba21..dbac5a53209 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
@@ -16,8 +16,8 @@ You should append `node` to `paths[node]` just after your `else` statement.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\.append\s*\(\s*node\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\s*\.append\s*\(\s*node\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
index af9e614049d..cbab2f3f4e2 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
@@ -28,7 +28,7 @@ You should print the provided string inside your new `for` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
+    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(\s*f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
index c91107c3592..9306e351052 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
@@ -32,7 +32,7 @@ You should create a variable called `targets_to_print` after your `while` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=/ms));
   }
 })
 ```
@@ -43,7 +43,7 @@ You should the ternary syntax to assign `[target]` when `target` is truthy, and
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
index d24ffe9dfc6..74c66608ec6 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
@@ -25,7 +25,7 @@ Just before your `print()` call, use the `del` keyword to delete the `age` key a
 You should use the `del` keyword to delete `copper['age']` before the `print()` call.
 
 ```js
-({ test: () => assert.match(code, /^del\s+copper\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
+({ test: () => assert.match(code, /^del\s+copper\s*\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
index b23c4359421..872f776e28a 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
@@ -24,7 +24,7 @@ Create an `__init__` method inside your `Board` class.
 Your method should be named `__init__`. Don't add any parameters.
 
 ```js
-assert.match(code, / +def\s+__init__\s*\(\)\:/);
+assert.match(code, / +def\s+__init__\s*\(\s*\)\:/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
index 93f0d5f4536..f5829fd8ea1 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
@@ -43,7 +43,6 @@ class Board:
 --fcc-editable-region--
         for index, line in enumerate(self.board):
           row_list = []
-          
+
 --fcc-editable-region--
 ```
-
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
index 119b0bc13a3..28b1c0bbfc1 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
@@ -16,7 +16,7 @@ Use list slicing to create the three lists of equal length representing the `lin
 You should have `enumerate([line[:3], line[3:6], line[6:]], start=1)` within the inner `for` loop.
 
 ```js
-assert.match(code, /\[line\[:3\],\s*line\[3:6\],\s*line\[6:\]\]\s*,\s*start\s*=\s*1/);
+assert.match(code, /\[\s*line\s*\[\s*:3\s*\]\s*,\s*line\s*\[\s*3\s*:\s*6\s*\]\s*,\s*line\s*\[\s*6\s*:\s*\]\s*\]\s*,\s*start\s*=\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
index 65f53ad78cb..4fd9d1a0755 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
@@ -14,13 +14,13 @@ In the `try` block, attempt to find the index of the first occurrence of `0` in
 Use the index of the first occurrence of `0` in the current row using `contents.index(0)`.
 
 ```js
-assert.match(code, /contents\.index\(0\)/)
+assert.match(code, /contents\.index\(\s*0\s*\)/)
 ```
 
 You should have `col = contents.index(0)` within the `try` block.
 
 ```js
-assert.match(code, /col\s*=\s*contents\.index\(0\)/)
+assert.match(code, /col\s*=\s*contents\.index\(\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
index d056d6e06ee..f155b422817 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
@@ -16,7 +16,7 @@ You should check if the number(`num`) is not present in `self.board[row]`.
 You should have `num not in self.board[row]` within `valid_in_row`.
 
 ```js
-assert.match(code, /num\s+not\s+in\s+self\.board\[row\]/)
+assert.match(code, /num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
index 2667c41672f..2a785397b1f 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
@@ -21,7 +21,7 @@ You should have `return num not in self.board[row]` within `valid_in_row`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_row");
 const {function_body} = valid;
-assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\[row\]/);
+assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
index b3c53c027a0..5fe90adbdc7 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] != num` within `valid_in_col`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /self\.board\[row\]\[col\]\s*!=\s*num/);
+assert.match(function_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
index e23e75cfe8d..987439b3597 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
@@ -28,7 +28,7 @@ You should have `all(self.board[row][col] != num for row in range(9))` within `v
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /all\s*\(\s*self\.board\[row\]\[col\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
+assert.match(function_body, /all\s*\(\s*self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
index 5ca4887b11c..8d9c209664b 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
@@ -21,7 +21,7 @@ You should assign the result of `(row // 3) * 3` to `row_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /row_start\s*=\s*\(row\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /row_start\s*=\s*\(\s*row\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
index ec281a82050..ddc5eec1c84 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
@@ -21,7 +21,7 @@ You should assign the result of `(col // 3) * 3` to `col_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /col_start\s*=\s*\(col\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /col_start\s*=\s*\(\s*col\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
index 873820e6238..61bdd5e0828 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
@@ -22,7 +22,7 @@ You should have `next_empty := self.find_empty_cell()` within the `solver` metho
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\)/);
+assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
index c1fcb932ba9..99b5452fc69 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
@@ -16,7 +16,7 @@ You should have `if (next_empty := self.find_empty_cell()) is None:` withing `so
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /if\s*\(next_empty\s*:=\s*self\.find_empty_cell\(\)\)\s*is\s*None:/)
+assert.match(function_body, /if\s*\(\s*next_empty\s*:=\s*self\.find_empty_cell\(\s*\)\s*\)\s*is\s*None:/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
index 23ebe4a673e..273bcc51461 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
@@ -7,7 +7,7 @@ dashedName: step-64
 
 # --description--
 
-If still there are empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive).
+If there are still empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive). Your loop should use the variable named `guess`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have `for guess in range(1,10):` within the `else` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "else");
-assert.match(block_body, /for\s+\w+\s+in\s+range\(1,\s*10\)/);
+assert.match(block_body, /for\s+\w+\s+in\s+range\(\s*1,\s*10\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
index 0d207c79c4b..b82ed6ddc68 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] = guess` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*guess/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*guess/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
index a50c92aec0e..26274fd86e8 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
@@ -17,7 +17,7 @@ You should have `self.solver()` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.solver\(\)/);
+assert.match(block_body, /self\.solver\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
index 1ba17915888..946cd2d9c0c 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
@@ -19,7 +19,7 @@ You should have `if self.solver():` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /if\s+self\.solver\(\):/);
+assert.match(block_body, /if\s+self\.solver\(\s*\):/);
 ```
 
 You should have `return True` within `if self.solver():`.
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
index e700e35c7f8..3d3aab8d861 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
@@ -19,7 +19,7 @@ You should have `self.board[row][col] = 0` outside the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*0/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*0/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
index 8d3a2e0d735..966091151e5 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
@@ -18,7 +18,7 @@ You should have `gameboard = Board(board)` within the `solve_sudoku` function.
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solve_sudoku");
-assert.match(function_body, /gameboard\s*=\s*Board\(board\)/);
+assert.match(function_body, /gameboard\s*=\s*Board\(\s*board\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
index 66cee9efee6..f8f9ea51048 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
@@ -22,7 +22,7 @@ With this, you are finished with building the sudoku solver!
 Call the `solve_sudoku` method with `puzzle` as input.
 
 ```js
-assert.match(code, /solve_sudoku\(puzzle\)/);
+assert.match(code, /solve_sudoku\(\s*puzzle\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
index 9c094fe70c6..9c2be28433b 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
@@ -37,7 +37,7 @@ You should assign `array[:middle_point]` to the `left_part` variable.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /left_part\s*=\s*array\[:middle_point\]/);
+    assert.match(function_body, /left_part\s*=\s*array\s*\[\s*:\s*middle_point\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
index 86ed7410922..4744a0bbe8a 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
@@ -22,7 +22,7 @@ You should replace `pass` keyword with an `if` statement with this condition: `l
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*pass/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
index d93f98e3abf..2c570406b6a 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
@@ -24,7 +24,7 @@ You should replace `pass` with `array[sorted_index] = left_part[left_array_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*array\[sorted_index\]\s*=\s*left_part\[left_array_index\]\s*(?!.*\bpass\b)/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]\s*(?!.*\bpass\b)/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
index 55f1bf9e500..56b5d917597 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
@@ -24,7 +24,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /else:\s*[^}]*array\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /else:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
index 9ff94e4564e..1b51c86eea9 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
@@ -24,7 +24,7 @@ Your `while` loop should have this condition: `left_array_index < len(left_part)
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(left_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):/m);
   }
 })
 ```
@@ -38,7 +38,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
index cf459d2fa38..ebd91e1fbd9 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = left_part[left_array_index]` in the body
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ You should not have `pass` in the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
index 7b2d5d57f54..d2d9129b714 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `left_array_i
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
index e64ffe8f993..aa7e38d3270 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
@@ -22,7 +22,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
index df3e9e33f18..3cdfa08f90c 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
@@ -22,7 +22,7 @@ Your `while` loop should have this condition: `right_array_index < len(right_par
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(right_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):/m);
   }
 })
 ```
@@ -36,7 +36,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
index e57882ecff2..b2249ef0771 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
index 0cd3f33027d..d2ebff30b59 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
@@ -20,7 +20,7 @@ You should have `right_array_index += 1` within the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bright_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bright_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
index 2cc3bcda4a2..1943d5e89e9 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
index fdfa315fad5..8bb4030b3db 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
@@ -24,7 +24,7 @@ You should create an `if` statement to check if `len(array) <= 1`. Don't forget
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*pass/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
index f9d53398a09..d411e649c34 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
@@ -20,7 +20,7 @@ You should replace `pass` with a `return` statement in the body of the `if` stat
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*return/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the body of the `if` statement
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
index 20bbc90ad52..2df795e6b46 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
@@ -21,8 +21,8 @@ You should add `1` to the current value of `left_array_index`.
     const { function_body } = merge_sort;
 
     const allowedMatches = [
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
     ]
 
     const anyMatch = allowedMatches.some((match) => match.test(function_body));
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
index 7c360c9cbc0..4a1bdc66b5c 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
@@ -34,7 +34,7 @@ You should assign `array[middle_point:]` to the `right_part` variable
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /right_part\s*=\s*array\[middle_point:\]/);
+    assert.match(function_body, /right_part\s*=\s*array\s*\[\s*middle_point\s*:\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
index 0d7bac6b585..3f55f555b1a 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
@@ -7,11 +7,11 @@ dashedName: step-2
 
 # --description--
 
-Replace the `pass` statement with a variable named `card_number` and a value of `4111-1111-4555-1142`.
+Replace the `pass` statement with a variable named `card_number` and a value of `'4111-1111-4555-1142'`.
 
 # --hints--
 
-You should have `card_number = "4111-1111-4555-1142"` within the `main` function.
+You should have `card_number = '4111-1111-4555-1142'` within the `main` function.
 
 ```js
 ({
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
index 7fba10b8f2c..b3f514bab47 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
@@ -13,7 +13,7 @@ The Luhn algorithm is as follows:
 
 1. From the right to left, double the value of every second digit; if the product is greater than 9, sum the digits of the products.
 2. Take the sum of all the digits.
-3. If the sum of all the digits is a multiple of `10`, then the number is valid; else it is not valid.
+3. If the sum of all the digits is a multiple of 10, then the number is valid; else it is not valid.
 
 Assume an example of an account number "7992739871" that will have a check digit added, making it of the form 7992739871x:
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
index 4f8e157bbca..468e8733119 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
@@ -30,7 +30,7 @@ You should have `card_number_reversed = card_number[0:4]` within the `verify_car
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
index 85ab7cde96e..277ef562a29 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
@@ -20,7 +20,7 @@ You should have `odd_digits = card_number_reversed[::2]` within the `verify_card
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\[::2\]/);
+        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\s*\[\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
index d0b05864142..790075b4516 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
@@ -27,7 +27,7 @@ You should have `sum_of_odd_digits += int(digit)` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(digit\)/);
+        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(\s*digit\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
index 79950e42dec..e8867112574 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
@@ -20,7 +20,7 @@ You should have `even_digits = card_number_reversed[1::2]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\[1::2\]/);
+        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\s*\[\s*1\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
index 23c8ebcdcd2..f0844f504ea 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
@@ -22,7 +22,7 @@ You should have `number = int(digit) * 2` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /number\s*=\s*int\(digit\)\s*\*\s*2/);
+        assert.match(function_body, /number\s*=\s*int\(\s*digit\s*\)\s*\*\s*2/);
     }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
index e7a6a926a8d..6d0ce52ffaa 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
@@ -30,8 +30,8 @@ You should have `number = number // 10 + number % 10` within the `if` statement.
         const verify_card_number = __helpers.python.getBlock("\n" + transformedCode, "if number >= 10");
         const { block_body } = verify_card_number;
         const allowedMatches = [
-            /number *= *\(?number *\/\/ *10\)? *\+ *\(?number *% *10/,
-            /number *= *\(?number *% *10\)? *\+ *\(?number *\/\/ *10/
+            /number *= *\(?\s*number *\/\/ *10\s*\)? *\+ *\(?\s*number *% *10/,
+            /number *= *\(?\s*number *% *10\s*\)? *\+ *\(?\s*number *\/\/ *10/
         ];
 
         const someMatch = allowedMatches.some(allowedMatch => allowedMatch.test(block_body));
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
index d4b8e12b4c9..3419964a99b 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
@@ -7,7 +7,7 @@ dashedName: step-33
 
 # --description--
 
-Adjust the `verify_card_number` call such that if it returns `True`, print `VALID!` to the console. Otherwise, print `INVALID!`.
+Adjust the `verify_card_number` call such that if it returns `True`, print `'VALID!'` to the console. Otherwise, print `'INVALID!'`.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `if verify_card_number(translated_card_number):` within the `mai
 })
 ```
 
-You should have `print("VALID!")` within the `if` statement.
+You should have `print('VALID!')` within the `if` statement.
 
 ```js
 ({
@@ -40,7 +40,7 @@ You should have `print("VALID!")` within the `if` statement.
 })
 ```
 
-You should have `print("INVALID!")` within the `else` clause.
+You should have `print('INVALID!')` within the `else` clause.
 
 ```js
 ({
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
index 3b853aff1a9..aaae68cf5e9 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
@@ -7,7 +7,7 @@ dashedName: step-34
 
 # --description--
 
-Change the value of `card_number` such that `INVALID!` is printed to the console.
+Change the value of `card_number` such that `'INVALID!'` is printed to the console.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
index d851948a604..67e06d3ffca 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
@@ -20,7 +20,7 @@ You should have `card_number_reversed = card_number[0:4:2]` within the `verify_c
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4:2\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
index 6c3367f79db..1db47a293b2 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
@@ -27,7 +27,7 @@ You should have `card_number_reversed = card_number[::-1]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[::-1\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*:\s*:\s*-1\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
index d7aab5b3d3a..73a865105ec 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
@@ -10,10 +10,10 @@ dashedName: step-4
 A dictionary is another built-in data type in Python. A dictionary is a collection of data in the form of *key*-*value* pairs. Dictionaries are defined with curly braces `{}` and they contain key-value pairs separated by commas. Each key is followed by a colon `:` and the value:
 
 ```py
-{"amount": 50.0, "category": "Food"}
+{'amount': 50.0, 'category': 'Food'}
 ```
 
-In the example above, `amount` and `category` are keys, and `50.0` and `Food` are their the corresponding values.
+In the example above, `amount` and `category` are keys, and `50.0` and `'Food'` are their the corresponding values.
 
 Create a dictionary with a key `amount` and value of the `amount` parameter and pass your new dictionary to the `.append()` call.
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
index 07f21ecefcc..510a44b67ab 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `category` as the key, and the `category` parameter as the value.
+Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `'category'` as the key, and the `category` parameter as the value.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
index f2363015596..7f9f383b8cb 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
@@ -10,11 +10,11 @@ dashedName: step-9
 You can access values in a dictionary through its keys. You need to use the bracket notation and include the key between the square brackets:
 
 ```py
-my_dict = {"amount": 50.0, "category": "Food"}
-my_dict["amount"] # 50.0
+my_dict = {'amount': 50.0, 'category': 'Food'}
+my_dict['amount'] # 50.0
 ```
 
-You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `amount` key and the `category` key in the `expense` dictionary.
+You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `'amount'` key and the `'category'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
index 8642aaa5c9f..43490a8b458 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
@@ -13,7 +13,7 @@ Lambda functions are brief, anonymous functions in Python, ideal for simple, one
 lambda x: expr
 ```
 
-In the example above, `x` is a parameter to be use in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
+In the example above, `x` is a parameter to be used in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
index 1153599910f..1fafe039961 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `amount` key in the `expense` dictionary.
+Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `'amount'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
index 6dc2a502182..758894d8784 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `category` key of the `expense` dictionary and `category`.
+Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `'category'` key of the `expense` dictionary and `category`.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
index d4a1dfe916a..8d421ba66de 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
@@ -23,7 +23,7 @@ You should define a function named `main()` without parameters.
 })
 ```
 
-You should move the `expense` list inside the `main()` function body.
+You should move the `expenses` list inside the `main()` function body.
 
 ```js
 ({ test: () => assert(__pyodide.runPython(`
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
index 3b7193317a3..365e4b886ce 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
@@ -14,7 +14,7 @@ while condition:
     <code>
 ```
 
-Below the `expense` list, create a `while` loop. Use `True` for the condition, and print the string `\nExpense Tracker` inside the loop body to show the title of the program.
+Below the `expenses` list, create a `while` loop. Use `True` for the condition, and print the string `'\nExpense Tracker'` inside the loop body to show the title of the program.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
index f8d783dbcdc..1b258f292ea 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
@@ -9,7 +9,7 @@ dashedName: step-25
 
 The `while` loop you created in the previous step is an infinite loop that will allow the program to continuously present menu options until the user decides to exit.
 
-After the `print()` call, add another one to print the string `1. Add an expense`.
+After the `print()` call, add another one to print the string `'1. Add an expense'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
index 1046f822389..29575b7375a 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
@@ -7,7 +7,7 @@ dashedName: step-26
 
 # --description--
 
-Next, add another `print()` call and pass the string `2. List all expenses`.
+Next, add another `print()` call and pass the string `'2. List all expenses'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
index f3675255751..6b2bc6ffaee 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
@@ -7,7 +7,7 @@ dashedName: step-27
 
 # --description--
 
-Provide the other menu options by printing the following three strings in your `while` loop: `3. Show total expenses`, `4. Filter expenses by category`, and `5. Exit`.
+Provide the other menu options by printing the following three strings in your `while` loop: `'3. Show total expenses'`, `'4. Filter expenses by category'`, and `'5. Exit'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
index 77c538c3285..32fe6ab7e0b 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
@@ -9,7 +9,7 @@ dashedName: step-28
 
 The `input()` function takes a user input and it returns the user input in the form of a string.
 
-Inside your `while` loop, call the `input()` function passing the string `Enter your choice:` as the argument, and assign the result to a variable named `choice`.
+Inside your `while` loop, call the `input()` function passing the string `'Enter your choice: '` as the argument, and assign the result to a variable named `choice`.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
index b18c48cd057..0940266004e 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
@@ -7,9 +7,9 @@ dashedName: step-29
 
 # --description--
 
-You are going to use conditional statements to check the user's choice. If the choice is `1`, it means the user wants to add an expense.
+You are going to use conditional statements to check the user's choice. If the choice is `'1'`, it means the user wants to add an expense.
 
-Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `1`. If it's true, it will be the starting point for adding a new expense.
+Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `'1'`. If it's true, it will be the starting point for adding a new expense.
 
 Inside the `if` statement body, declare a variable `amount` and assign it an empty `input()` call.
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
index f244e07ddd3..2b88a233291 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
@@ -9,7 +9,7 @@ dashedName: step-30
 
 Inside the `if` statement, you should ask the user to enter the amount for the expense and store it in a variable.
 
-Pass the string `Enter amount:` to your empty `input()` call, so you can store the expense.
+Pass the string `'Enter amount: '` to your empty `input()` call, so you can store the expense.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
index 990f5c288c3..0511583a76a 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
@@ -9,7 +9,7 @@ dashedName: step-34
 
 To list all expenses, you can use an `elif` statement after an `if` statement. The `elif` checks additional conditions and only works following an `if` statement.
 
-Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `\nAll Expenses:`.
+Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `'\nAll Expenses:'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
index 0788712f6f0..77331e9840b 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
@@ -9,7 +9,7 @@ dashedName: step-36
 
 To show the total expenses, create an `elif` statement that checks if `choice == '3'`.
 
-If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `\nTotal Expenses:` as the first argument and `total_expenses(expenses)` as the second argument.
+If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `'\nTotal Expenses: '` as the first argument and `total_expenses(expenses)` as the second argument.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
index 08424ffb2e0..a7dc82d4f78 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
@@ -7,9 +7,9 @@ dashedName: step-41
 
 # --description--
 
-To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `5`.
+To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `'5'`.
 
-Inside the new `elif` statement, print the string `Exiting the program.` to show that the program is terminating its execution.
+Inside the new `elif` statement, print the string `'Exiting the program.'` to show that the program is terminating its execution.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `elif choice == '5':` in your code.
 })
 ```
 
-You should print `Exiting the program.` in your new `elif` statement.
+You should print `'Exiting the program.'` in your new `elif` statement.
 
 ```js
 ({ test: () =>
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
index 3237bab6876..cedc88c3b61 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
@@ -22,7 +22,7 @@ You should replace `pass` with an empty list named `snake_cased_char_list` withi
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\]/);
+        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\s*\]\s*/);
     }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
index abdebbcec2b..72b2f5dd928 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
@@ -34,7 +34,7 @@ You should use the `.append()` method to add `char` to the `snake_cased_char_lis
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list.append\(char\)/);
+        assert.match(function_body, / +snake_cased_char_list.append\(\s*char\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
index 0c900c7d408..588f42adcde 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
@@ -7,11 +7,11 @@ dashedName: step-12
 
 # --description--
 
-Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `aLongAndComplexString` as input to the function and print out the output using the `print()` function.
+Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `'aLongAndComplexString'` as input to the function and print out the output using the `print()` function.
 
 # --hints--
 
-You should call `convert_to_snake_case()` inside the `main()` function and pass `aLongAndComplexString` as input to the function.
+You should call `convert_to_snake_case()` inside the `main()` function and pass `'aLongAndComplexString'` as input to the function.
 
 ```js
 ({
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
index 6c058bb54f6..7e79d4d2696 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
@@ -7,7 +7,7 @@ dashedName: step-22
 
 # --description--
 
-Finally try out this new implementation by executing the program. Change the input string to `IAmAPascalCasedString` and see if it comes out as `i_am_a_pascal_cased_string`, even though that's a lie.
+Finally try out this new implementation by executing the program. Change the input string to `'IAmAPascalCasedString'` and see if it comes out as `'i_am_a_pascal_cased_string'`, even though that's a lie.
 
 If you've done everything correctly, you should see the input string converted into snake case, like before.
 
@@ -15,7 +15,7 @@ Congratulations! Now your `convert_to_snake_case()` function is ready.
 
 # --hints--
 
-You should change the input string from `aLongAndComplexString` to `IAmAPascalCasedString` inside the `main()` function.
+You should change the input string from `'aLongAndComplexString'` to `'IAmAPascalCasedString'` inside the `main()` function.
 
 ```js
 ({
@@ -24,7 +24,7 @@ You should change the input string from `aLongAndComplexString` to `IAmAPascalCa
         const main = __helpers.python.getDef("\n" + transformedCode, "main");
         const { function_body } = main;
 
-        assert.match(function_body, / +print\(convert_to_snake_case\('IAmAPascalCasedString'\)\)/);
+        assert.match(function_body, / +print\(\s*convert_to_snake_case\(\s*'IAmAPascalCasedString'\s*\)\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
index 857f79329f6..2475f1a5069 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
@@ -7,9 +7,9 @@ dashedName: step-3
 
 # --description--
 
-The puzzle starts with the disks piled up on the first rod, in decreasing size. You need to populate your first list with numbers representing the various disk sizes.
+The puzzle starts with the disks piled up on the first rod, in decreasing size, with the smallest disk on top and the largest disk on the bottom. You need to populate your first list with numbers representing the various disk sizes.
 
-Instead of adding the items manually to the first list, generate a sequence of numbers from `3` to `1` by using the `range()` function and assign it to `rods['A']`.
+Instead of adding the items manually to the first list, generate a sequence of numbers counting down from `3` to `1` by using the `range()` function and assign it to `rods['A']`. Here, `3` represents the largest disk at the bottom of the pile and `1` represents the smallest disk at the top of the pile.
 
 The syntax is `range(x, y, h)`, where `x` is the starting integer (inclusive), `y` is the last integer (not inclusive), and `h` is the difference between a number and the next one in the sequence.
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
index cd3d851a1e7..1945a313dca 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
@@ -14,13 +14,13 @@ Now check the data type of your `'A'` key by passing it to the `type()` function
 You should pass your `'A'` key to the `type()` function.
 
 ```js
-({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)/) })
+({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)/) })
 ```
 
 You should print the type of `rods['A']` using the `print()` function.
 
 ```js
-({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)\s*\)/) })
+({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
index 05ae3785d68..e4c1cad70db 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
@@ -14,7 +14,7 @@ Now that the type is `list` as required, you can remove the `print()` call.
 You should remove `print(type(rods['A']))` from your code.
 
 ```js
-({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
+({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
index 78e19cd852c..c19a7b4af7e 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
@@ -9,7 +9,7 @@ dashedName: step-16
 
 At the end of this project, you will create a recursive solution to the Tower of Hanoi puzzle, but now you are going to explore an iterative approach to this problem.
 
-Start by adding a `for` loop to your function that iterates through the number of moves and prints the current iteration number.
+Start by adding a `for` loop to your function that iterates through the `number_of_moves` and prints the current iteration number.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
index 81af466a6ef..ab97d4ec512 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `A` and `B` (the source and the auxiliary rods).
+When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `'A'` and `'B'` (the source and the auxiliary rods).
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
index f6d6d7e37cd..df19d8d90dc 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
@@ -7,7 +7,7 @@ dashedName: step-21
 
 # --description--
 
-Finally, when the move number divided by 3 has no remainder, the movement is allowed between `B` and `C`.
+Finally, when the move number divided by 3 has no remainder, the movement is allowed between `'B'` and `'C'`.
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
index 6d97da81775..190e44b1e53 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
@@ -18,10 +18,10 @@ You should have an `elif` statement to check if `rods[source]` is not empty and
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:`);
 assert.match(code, re);
 ```
 
@@ -30,10 +30,10 @@ You should set `forward` to `True` inside your new `elif` statement. You should
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
 assert.match(code, re);
 ```
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
index 93dec13ccd1..a50f25b2abd 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
@@ -20,7 +20,7 @@ You should add an `if` statement to execute when `forward` is `True` after the `
 You should print the provide string inside your new `if` statement.
 
 ```js
-({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
+({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
index e6589376ba2..6abf4aa9b1e 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
@@ -14,13 +14,13 @@ After printing the move, you need to remove the last element from the source rod
 You should remove the last element from `rods[source]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[target].append(rods[source].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
index 62cf87ba6d8..266bda2a29b 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
@@ -14,25 +14,25 @@ When `forward` is `False`, the disk has to be moved in the opposite direction. W
 You should have an `else` clause to move the disks in the opposite direction.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
 ```
 
 You should have `print(f'Moving disk {rods[target][-1]} from {target} to {source}')` inside your `else` clause.
 
 ```js
-({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
+({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
 ```
 
 You should remove the last element from `rods[target]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[source].append(rods[target].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
index 77ba3efe01b..e72bde49ab4 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
@@ -14,13 +14,13 @@ Outside the `else` block, add a comment saying `display our progress` and print
 You should use the provided text to add a comment outside the `else` block.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
 ```
 
 You should print the `rods` object outside the `else` block, after the comment.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
index de4fde4a3eb..2088e620cf7 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
@@ -15,7 +15,7 @@ You should move the code nested inside the first `if` statement (except the firs
 
 ```js
 ({ test: () => {
-  assert.match(code, /def\s+make_allowed_move\(rod1, rod2\):\s+forward\s+=\s+False\s+if\s+not\s+rods\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\[\s*source\s*\]\s+and\s+rods\[\s*source\s*\]\[-1\]\s<\srods\[\s*target\s*\]\[\s*-\s*1\s*\]:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\[\s*source\s*\].append\(\s*rods\[\s*target\s*\].pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+\print\(\s*rods\s*\)/);
+  assert.match(code, /def\s+make_allowed_move\(\s*rod1, rod2\s*\):\s+forward\s+=\s+False\s+if\s+not\s+rods\s*\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\s*\[\s*source\s*\]\s+and\s+rods\s*\[\s*source\s*\]\s*\[\s*-1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\s*\[\s*source\s*\]\s*\.append\(\s*rods\s*\[\s*target\s*\]\s*\.pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\(\s*rods\s*\)/);
   }
 })
 ```
@@ -47,7 +47,7 @@ def move(n, source, auxiliary, target):
             if not rods[target]:
                 forward = True
             elif rods[source] and rods[source][-1] < rods[target][-1]:
-                forward = True              
+                forward = True
             if forward:
                 print(f'Moving disk {rods[source][-1]} from {source} to {target}')
                 rods[target].append(rods[source].pop())
@@ -57,7 +57,7 @@ def move(n, source, auxiliary, target):
 
             # display our progress
             print(rods)
---fcc-editable-region--            
+--fcc-editable-region--
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
         elif remainder == 0:
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
index 730409803dd..46d7bef7fff 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
@@ -15,11 +15,11 @@ You should change each occurrence of `source` inside the `make_allowed_move()` f
 
 ```js
 ({ test: () => {
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
index 7b5cf301ba5..65e6a425afa 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
@@ -16,11 +16,11 @@ You should change each occurrence of `target` inside `make_allowed_move` into `r
 ```js
 ({ test: () => {
   assert.match(code, /if\s+not\s+rods\s*\[\s*rod2\s*\]\s*:/);
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\[\s*rod2\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*rod2\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\s*\[\s*rod2\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod2\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
index c95470bb0d4..1db920c38cf 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
@@ -11,7 +11,7 @@ It looks like it's working! But the output is not very readable. Print a new lin
 
 # --hints--
 
-You should pass a string with a new line character (`\n`) as the second argument for your two `print(rods)` calls.
+You should pass a string with a new line character (`'\n'`) as the second argument for your two `print(rods)` calls.
 
 ```js
 ({ test: () => assert.match(code, /print\(\s*rods\s*,\s*('|")\\n\1\s*\)(?=.*print\(\s*rods\s*,\s*('|")\\n\2\s*\))/s) })
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
index 164aaea6c0b..53d1bd43634 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
@@ -16,7 +16,7 @@ For now, each recursive call prints the `rods` dictionary without performing any
 You should remove the last element from the `rods[source]` list and append it to the `rods[target]` list before the `print` call.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
index af9012a663b..cc484dcee01 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
@@ -14,7 +14,7 @@ Before appending the last element to the target, add a comment saying `move the
 You should add a comment with the provided text before `rods[target].append(rods[source].pop())`.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\))/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
index 0c978286332..14b5df82ceb 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Although recursion could sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
+Although recursion can sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
 
 Set `NUMBER_OF_DISKS` to `5` and check the output.
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
index 950b0a88e90..857ca1ca1be 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
@@ -21,7 +21,7 @@ You should delete the last three lines in your code.
 ({ test: () => {
   assert.isFalse(/pattern\s*=\s*r("|')\\W\1/.test(code));
   assert.isFalse(/quote\s*=\s*("|')_\1/.test(code));
-  assert.isFalse(/print\(re\.findall\(pattern, quote\)\)/.test(code));
+  assert.isFalse(/print\(\s*re\.findall\(\s*pattern, quote\s*\)\s*\)/.test(code));
 }})
 ```
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
index 6d14bc6459d..6d1e251e974 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
@@ -14,7 +14,7 @@ Now, turn the empty string in the constraint tuple into a regex pattern to match
 You should have the `(nums, '[0123456789]')` tuple in your `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
+({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
index b331464b213..4e2c28000cc 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
@@ -27,7 +27,7 @@ You should replace your existing `for` loop and two `if` statements with a singl
 Your new `if` condition should be a list comprehension that is the result of evaluating the expression `constraint <= len(re.findall(pattern, password))` for each `constraint`-`pattern` tuple in the `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /^(\s{8})if\s+\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
+({ test: () => assert.match(code, /^(\s{8})if\s*\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
index 2e6d119b78b..5fa7e5c131a 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
@@ -1,6 +1,6 @@
 ---
 id: 6551eebe6cbb2e6cadf9b468
-title: Step 2
+title: Passo 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -15,7 +15,7 @@ string_2 = 'I am also a string'
 string_3 = 'This is not valid"
 ```
 
-Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `Hello World` to this variable.
+Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `'Hello World'` to this variable.
 
 # --hints--
 
@@ -32,7 +32,7 @@ You should declare a variable called `text`. Pay attention to place the variable
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello World` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
+You should assign the string `'Hello World'` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello World\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
index d40877ed6af..2b65b4b4212 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
@@ -14,7 +14,7 @@ greet = 'Hello!'
 print(greet)
 ```
 
-The code in the example above would print the string `Hello!`, which is the value of the variable `greet` passed to `print()` as the argument.
+The code in the example above would print the string `'Hello!'`, which is the value of the variable `greet` passed to `print()` as the argument.
 
 Print your `text` variable to the screen by passing the `text` variable as the argument to the `print()` function.
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
index 86104aff4f6..7c28d74b6b7 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `Hello World`, `H` is at index `0`, `e` is at index `1`, and so on. 
+Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `'Hello World'`, `'H'` is at index `0`, `'e'` is at index `1`, and so on.
 
 Each character of a string can be accessed by using bracket notation. You need to write the variable name followed by square brackets and add the index of the character between the brackets:
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
index 5d0ae1dd2fa..3103cb653bf 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-You can see `11` printed on the terminal because `Hello World` contains 11 characters.
+You can see `11` printed on the terminal because `'Hello World'` contains 11 characters.
 
 Another useful built-in function is `type()`, which returns the data type of a variable. Modify your `print()` call to print the data type of `text`.
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
index cedb112a823..074c15b2e19 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
@@ -14,7 +14,7 @@ Key aspects of variable naming in Python are:
 - Variable names are case sensitive, i.e. `my_var` is different from `my_Var` and `MY_VAR`.
 - Finally, it is a common convention to write variable names using `snake_case`, where each space is replaced by an underscore character and the words are written in lowercase letters.
 
-Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `abcdefghijklmnopqrstuvwxyz` to this variable.
+Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `'abcdefghijklmnopqrstuvwxyz'` to this variable.
 
 # --hints--
 
@@ -38,7 +38,7 @@ You should declare a variable called `alphabet`. Pay attention to place the vari
 assert.match(code, /^alphabet\s*=/m)
 ```
 
-You should assign the string `abcdefghijklmnopqrstuvwxyz` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
+You should assign the string `'abcdefghijklmnopqrstuvwxyz'` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
 
 ```js
 assert.match(code, /^alphabet\s*=\s*("|')abcdefghijklmnopqrstuvwxyz\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
index abe8ced263d..5c272b6d6f1 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
@@ -15,7 +15,7 @@ Start by finding the position of the first letter in the string. One way is to c
 text.find('W')
 ```
 
-Above, uppercase `W` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `W` character inside the string stored in the `text` variable.
+Above, uppercase `'W'` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `'W'` character inside the string stored in the `text` variable.
 
 At the end of your code, call `.find()` on your `alphabet` string and pass `text[0]` to the method. Note that a method is just a function that belongs to an object (you will learn more about that in another project).
 
@@ -36,7 +36,7 @@ assert.match(code, /alphabet\.find\s*\(.*\)/)
 You should call the `.find()` method on the `alphabet` variable and pass `text[0]` to the method. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)/m)
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 412619ccc4c..3e3af82109c 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -22,7 +22,7 @@ assert.match(code, /^index\s*=/m)
 You should assign the value returned by `alphabet.find(text[0])` to your `index` variable.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 34166fe3da4..83feddb9318 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `H`, is not found, since `alphabet` contains only lowercase letters.
+`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `'H'`, is not found, since `alphabet` contains only lowercase letters.
 
 You can transform a string into its lowercase equivalent with the `.lower()` method. Add another `print()` call to print `text.lower()` and see the output.
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index 54d47cf3f49..9a554ddeef1 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -27,7 +27,7 @@ assert.match(code, /^print\s*\(\s*index\s*\)/m);
 You should update your `alphabet.find(text[0])` call to use `text[0].lower()` as the argument. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index 95e2567fa84..e4c0036ebff 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-As you can see from the output, `h` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
+As you can see from the output, `'h'` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
 
 Modify your `shifted` variable so that it stores the value of `alphabet` at index `index + shift`.
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index 41811515713..a8da79ffd22 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -35,14 +35,14 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i/m)
 ```
 
-You should write the `in` keyword after `for i `. Make sure to leave a space around the `in` keyword.
+You should write the `in` keyword after `for i`. Make sure to leave a space around the `in` keyword.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i\s+in\s+/m)
 ```
 
-You should write `text` after `for i in `. Don't forget to add the final `:`.
+You should write `text` after `for i in`. Don't forget to add the final `:`.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index b7051de41c3..bdf47ed7c6f 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -7,7 +7,7 @@ dashedName: step-42
 
 # --description--
 
-Currently, spaces get encrypted as `c`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
+Currently, spaces get encrypted as `'c'`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
 
 ```py
 if x != 0:
@@ -16,7 +16,7 @@ if x != 0:
 
 In the example above, the condition of the `if` statement is `x != 0`. The code `print(x)`, inside the `if` statement body, runs only when the condition evaluates to `True` (in this example, meaning that `x` is different from zero).
 
-At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `space!`. Remember to indent this line.
+At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `'space!'`. Remember to indent this line.
 
 # --hints--
 
@@ -36,7 +36,7 @@ const {block_body} = __helpers.python.getBlock(commentless_code, /for\s+char\s+i
 assert(block_body.match(/if\s+char\s*==\s*("|')\s\1\s*:/));
 ```
 
-You should print the string `space!` inside your new `if` statement.
+You should print the string `'space!'` inside your new `if` statement.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index 69191130521..f3fc108e506 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, instead of printing `space!`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
+Now, instead of printing `'space!'`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index dfc91239b0e..f6ea23b4325 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Try to assign the string `Hello Zaira` to your `text` variable and see what happens in the console.
+Try to assign the string `'Hello Zaira'` to your `text` variable and see what happens in the console.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have a `text` variable.
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello Zaira` to your `text` variable.
+You should assign the string `'Hello Zaira'` to your `text` variable.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello\sZaira\1/m)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index 5629c8d00fb..b5f4088d3b7 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -7,7 +7,7 @@ dashedName: step-58
 
 # --description--
 
-Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `python` to this variable.
+Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `'python'` to this variable.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should declare a variable called `custom_key`.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should assign the string `python` to your `custom_key` variable.
+You should assign the string `'python'` to your `custom_key` variable.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "python") })
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 179f7313a5d..47211f5e8bc 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -7,8 +7,7 @@ dashedName: step-59
 
 # --description--
 
-Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text.
-At the beginning of your function body, declare a `key_index` variable and set it to zero.
+Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text. At the beginning of your function body, declare a `key_index` variable and set it to zero.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 660fb4ab263..7e452e05438 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
 
     for char in message.lower():
 --fcc-editable-region--
-        
+
         if char == ' ':
             encrypted_text += char
 --fcc-editable-region--            
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7727f6c57a8..7ca155b0c73 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -7,8 +7,7 @@ dashedName: step-62
 
 # --description--
 
-You will need to increase the `key_index` count for the next iteration.
-To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
+You will need to increase the `key_index` count for the next iteration. To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index 67567e88cdf..a6cd4a9a348 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
         if char == ' ':
             encrypted_text += char
         else:
-            
+
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index da202c1490a..7ca3ec197c0 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -50,7 +50,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key):
             # Find the right key character to encode
             key_char = key[key_index % len(key)]
             key_index += 1
-            
+
 --fcc-editable-region--            
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index 7ca7c2f323a..f783cbf3472 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -32,7 +32,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -41,7 +41,7 @@ def vigenere(message, key):
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
-            
+
             offset = alphabet.index(key_char)
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index a371865b1ef..28c793c06c3 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -55,7 +55,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index 60289b5525e..acf5b0f71c8 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -43,7 +43,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -57,7 +57,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index b1f7c3a5caa..87f8a5aa7f3 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -31,7 +31,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 534ff69ec91..84f3a8477e1 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -46,7 +46,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -60,9 +60,9 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 --fcc-editable-region--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index 3dfdd998a92..d29b009f3cf 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -47,9 +47,9 @@ def vigenere(message, key, direction):
             new_index = (index + offset) % len(alphabet)
 --fcc-editable-region--
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 #encryption = vigenere(text, custom_key)
 #print(encryption)
 ```
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 330871bc52a..9f1ea94390c 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,9 +45,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 --fcc-editable-region--
 #encryption = vigenere(text, custom_key)
 #print(encryption)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index db2c5bdfe33..adf869e6b5f 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index b4b329858a2..8e744b4c09f 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index f49b76f417f..cd7e9ce3a58 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -39,7 +39,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -53,7 +53,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index b295655e5c6..a6ecf2194d0 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -38,7 +38,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -52,9 +52,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index 521f1f961d3..d77bcd5d985 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -19,7 +19,7 @@ You should have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should be equal to the string `Hello Zaira!`.
+Your `text` variable should be equal to the string `'Hello Zaira!'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "Hello Zaira!") })
@@ -40,7 +40,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -54,9 +54,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index f9dfeed2c7d..a60afdc14cc 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -53,9 +53,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index fa8531f3421..40bfdb53982 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -48,9 +48,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index aba2d5665d2..822b22f2743 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -46,9 +46,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index a8a4a146373..82df5c7e409 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -70,7 +70,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index 900a42440bf..ceda0450cc8 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -51,7 +51,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index b37f689c14a..c0d946a1d38 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index d863b1b5667..e86470c6c34 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -51,15 +51,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index e7e001fd7b2..cb2c9d5e191 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -9,7 +9,7 @@ dashedName: step-86
 
 It works! Now, you are going to start with an encrypted message to be decrypted.
 
-Change the value of `text` to the string `mrttaqrhknsw ih puggrur`.
+Change the value of `text` to the string `'mrttaqrhknsw ih puggrur'`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should still have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should have the value of `mrttaqrhknsw ih puggrur`.
+Your `text` variable should have the value of `'mrttaqrhknsw ih puggrur'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "mrttaqrhknsw ih puggrur") })
@@ -54,15 +54,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = encrypt(text, custom_key)
 print(encryption)
 decryption = decrypt(encryption, custom_key)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index 7295239a2e5..a2e43552133 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -46,7 +46,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -60,9 +60,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 582c138e1b3..3cfffa05b63 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index 43650a129a7..b809b6cc227 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -9,11 +9,11 @@ dashedName: step-88
 
 Two or more strings can be concatenated by using the `+` operator. For example: `'Hello' + ' there!'` results in `'Hello there!`.
 
-Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `Encrypted text: `. Pay attention to the spacing.
+Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `'Encrypted text: '`. Pay attention to the spacing.
 
 # --hints--
 
-You should call `print()` and pass `'Encrypted text: ' + text` as the arguments. 
+You should call `print()` and pass `'Encrypted text: ' + text` as the arguments.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--    
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index 68b96128144..bb3bf128cf9 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -7,11 +7,11 @@ dashedName: step-89
 
 # --description--
 
-Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 # --hints--
 
-You should have a `print()` call that prints `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+You should have a `print()` call that prints `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -52,12 +52,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index e52496dd150..6d5c9a3c856 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -7,7 +7,7 @@ dashedName: step-90
 
 # --description--
 
-In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings. 
+In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings.
 
 Interpolation means writing placeholders that will be replaced by the specified values when the program runs. For example, you can get the same result of `'Encrypted text: ' + text` with `f'Encrypted text: {text}'`. You need to put an `f` before the quotes to create the f-string and write the variables or expressions you want to interpolate between curly braces.
 
@@ -49,12 +49,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index ebdb8b79456..4e28d4737fc 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index 8e107b0fff4..d55577ba1cf 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -47,12 +47,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 0f916bf649e..073dfdcd2bb 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -50,12 +50,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 23af806c5ce..006a04850ea 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -7,7 +7,7 @@ dashedName: step-95
 
 # --description--
 
-Wait a minute! You cannot decrypt anything with the wrong key. Try with `happycoding`.
+Wait a minute! You cannot decrypt anything with the wrong key. Try with `'happycoding'`.
 
 With that, your cipher project is complete.
 
@@ -19,7 +19,7 @@ You should still have a `custom_key` variable.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should modify the `custom_key` value into `happycoding`.
+You should modify the `custom_key` value into `'happycoding'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "happycoding") })
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
@@ -96,12 +96,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 05c44517e6f..9a4c27f1945 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -7,8 +7,7 @@ dashedName: step-41
 
 # --description--
 
-Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare.
-They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
+Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare. They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
 
 Python has the following comparison operators:
 
@@ -47,11 +46,11 @@ Python has the following comparison operators:
   </tbody>
 </table>
 
-At the beginning of your loop body, print the result of comparing `char` with an empty space (`' '`). Use the equality operator `==` for that.
+At the beginning of your loop body, print the result of comparing `char` with a space (`' '`). Use the equality operator `==` for that.
 
 # --hints--
 
-You should compare `char` with an empty space using the equality operator inside your `for` loop.
+You should compare `char` with a space using the equality operator inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -62,7 +61,7 @@ You should compare `char` with an empty space using the equality operator inside
 })
 ```
 
-You should print the result of comparing `char` with an empty space inside your `for` loop.
+You should print the result of comparing `char` with a space inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -73,7 +72,7 @@ You should print the result of comparing `char` with an empty space inside your
 })
 ```
 
-You should print the result of comparing `char` with an empty space at the beginning of your loop.
+You should print the result of comparing `char` with a space at the beginning of your loop.
 
 ```js
 ({ test: () => {
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 34e53a7cc4f..86a5a8baa9a 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -18,7 +18,7 @@ Give your `for` loop a body by adding a call to `print(i)`. Remember to indent t
 
 # --hints--
 
-You should add `print(i)` to your `for` loop body. Pay attention to the indentation. 
+You should add `print(i)` to your `for` loop body. Pay attention to the indentation.
 
 ```js
 assert.match(code, /^for\s+i\s+in\s+text:\s+print\s*\(\s*i\s*\)/m)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index e7886b5f796..042349ee0a4 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -15,7 +15,7 @@ Restore the indentation for your `print(i)` call.
 
 # --hints--
 
-You should indent `print(i)` inside your `for` loop body. 
+You should indent `print(i)` inside your `for` loop body.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index 6215b77a724..f971dfe2276 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -13,7 +13,7 @@ Rename your `i` variable to `char`.
 
 # --hints--
 
-You should replace `i` with `char`. 
+You should replace `i` with `char`.
 
 ```js
 assert.match(code, /^for\s+char\s+in\s+text:\s+print\s*\(\s*char\s*\)/m)
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index b2203350e08..97fee73da43 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -7,7 +7,7 @@ dashedName: step-31
 
 # --description--
 
-Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `train`, but this is not valid:
+Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `'train'`, but this is not valid:
 
 ```py
 my_string = 'brain'
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index 39784236282..e2b04ef618e 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -14,7 +14,7 @@ message = 'Hello World'
 message = 'Hello there!'
 ```
 
-Delete the `text[0]` line and reassign `text` the string `Albatross`.
+Delete the `text[0]` line and reassign `text` the string `'Albatross'`.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*\[\s*0\s*\]\s*\=\s*("|')\w\1/.test(commentless_code));
 ```
 
-You should reassign `text` the string `Albatross`. Do not modify `text = 'Hello World'`.
+You should reassign `text` the string `'Albatross'`. Do not modify `text = 'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 076a71f8786..6b04513e34d 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -20,7 +20,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*=\s*("|')Albatross\1/.test(commentless_code))
 ```
 
-You should still have a `text` variable with the value `Hello World`.
+You should still have a `text` variable with the value `'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index 442d9c6cb33..a98c25c7099 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index 71e999219ba..d239d653b25 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
index 77f00424f1f..cd02c3e96d7 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
@@ -16,13 +16,13 @@ Delete `pass` and recursively call the `_insert` method on the left child of the
 You should call the `self._insert` method passing `node.left` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the `left` attribute of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
index b192c1334c6..46b2785f9d2 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
@@ -14,13 +14,13 @@ Inside your `elif` clause, replace `pass` with a call to the `_insert` method on
 You should call the `self._insert()` method passing `node.right` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the right attribute (`node.right`) of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
index 3b8147e90c7..884f575c312 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
@@ -25,7 +25,7 @@ You should call the `_search` method within the `search` method.
 You should call the `_search` method passing `self.root` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
index 9eae48476f6..6c29c7be8c3 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
@@ -14,7 +14,7 @@ Now, make the `search` method return the result of the `_search()` call.
 You should prepend the `return` statement to your `_search()` call.
 
 ```js
-({ test: () => assert.match(code, /return\s+self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /return\s+self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
index 48c326b2a56..5ed67b39c1e 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
@@ -22,8 +22,8 @@ assert.match(after_split, /if\s+key\s+<\s+node\.key/);
 
 You should return `self._search(node.left, key)` from your new `if` block.
 
-```js    
-({ test: () => assert.match(code, /return\s+self\._search\(node\.left,\s*key\)/) });    
+```js
+({ test: () => assert.match(code, /return\s+self\._search\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
index 8faea421246..bf013ae5a23 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
@@ -25,14 +25,14 @@ assert.match(after_split, /self\._search/);
 You should pass two arguments to the call of the `_search` method: `node.right` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should return the result of the `_search` method call.
 
 ```js
 ({
-  test: () => assert.match(code, /return\s+self\._search\(node\.right,\s*key\)/)
+  test: () => assert.match(code, /return\s+self\._search\(\s*node\.right,\s*key\s*\)/)
 });
 ```
 
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
index 0c8a06cf5e7..d8b1956ab98 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
@@ -18,7 +18,7 @@ Within the `BinarySearchTree` class, define a `delete` method. It takes two para
 You should define a `delete` method with two parameters: `self` and `key`. Remember to use `pass`.
 
 ```js
-({ test: () => assert.match(code, /def\s+delete\(self,\s*key\)/) });
+({ test: () => assert.match(code, /def\s+delete\(\s*self,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
index 377aa20b540..da90582f298 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
@@ -14,7 +14,7 @@ Inside the `delete` method, delete `pass` and call the private helper method `_d
 Your `delete` method should call the `_delete` method with two arguments: `self.root` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
index b62541d5517..96dc0ae6487 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
@@ -16,7 +16,7 @@ To handle this case, assign the result of the `_delete` call to `self.root`.
 You should assign the result of the `_delete()` call to `self.root`.
 
 ```js
-({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
index bf6f2ab4ffe..eaad945afe5 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
@@ -14,7 +14,7 @@ Inside the `BinarySearchTree` class, define a new helper method called `_delete`
 You should define the `_delete` method inside the `BinarySearchTree` class with the parameters `self`, `node` and `key`. Remember to use the `pass` keyword.
 
 ```js
-assert.match(code, /def\s+_delete\(self,\s*node,\s*key\)/);
+assert.match(code, /def\s+_delete\(\s*self,\s*node,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
index 9c3f6fd608d..4ab93b0ed1e 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
@@ -14,13 +14,13 @@ Within the `if` block, replace `pass` with a call to the `_delete` method, passi
 You should call the `_delete` method with `node.left` and the `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to the left child (`node.left`) of the current node.
 
 ```js
-assert.match(code, /node\.left\s*=\s*self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /node\.left\s*=\s*self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
index c245f9a5312..a24eec35d86 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
@@ -23,13 +23,13 @@ assert.match(after_split, /elif\s+key\s+>\s+node\.key/);
 You should call the `_delete` method with `node.right` and `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to `node.right`.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
index 61a28aab2b5..9264f543477 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
@@ -20,7 +20,7 @@ For now, add a `_min_value` call after your `elif` block, passing `node.right` a
 You should assign `self._min_value(node.right)` to `node.key` after your `elif` block.
 
 ```js
-assert.match(code, /node\.key\s*=\s*self\._min_value\(node\.right\)/);
+assert.match(code, /node\.key\s*=\s*self\._min_value\(\s*node\.right\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
index 76ef5b24f04..df79cef13cd 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
@@ -22,7 +22,7 @@ assert.match(code, /self\._delete\(\s*node\.right\s*,\s*node\.key\s*/);
 You should assign the return value of the `_delete()` call to the right child of the current node.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right\,\s*node\.key/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right\,\s*node\.key/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
index 435d1ddb00b..7ac465af0b6 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
@@ -16,7 +16,7 @@ This will start the traversal from the root of the binary search tree (`self.roo
 You should call `_inorder_traversal` and pass `self.root` and `result` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._inorder_traversal\(self\.root,\s*result\)/) })
+({ test: () => assert.match(code, /self\._inorder_traversal\(\s*self\.root,\s*result\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
index 160ef3cc76a..676f1d70d0d 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
@@ -14,7 +14,7 @@ Define the `_inorder_traversal` method and give it three parameters: `self`, `no
 You should define a method `_inorder_traversal` that takes three parameters: `self`, `node`, and `result`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+_inorder_traversal\(self,\s*node,\s*result\)/);
+assert.match(code, /def\s+_inorder_traversal\(\s*self,\s*node,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
index 65729d86c26..03d6252fa8a 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
@@ -20,7 +20,7 @@ assert.match(code, /if\s+node:/);
 You should call `_inorder_traversal` on the `node.left` inside the `if` block.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.left\s*,\s*result\s*\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.left\s*,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
index c0a7340cd41..8848fcf5b80 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
@@ -14,7 +14,7 @@ Still inside the `if` block, append the `key` of the current node to the `result
 You should append `node.key` to the `result` list.
 
 ```js
-assert.match(code, /result\.append\(node\.key\)/);
+assert.match(code, /result\.append\(\s*node\.key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
index 8bcee4f0320..0f4e6ba8b31 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
@@ -16,13 +16,13 @@ Create an instance of the `BinarySearchTree` class and assign it to the variable
 You should create an instance of the `BinarySearchTree` class.
 
 ```js
-assert.match(code, /BinarySearchTree\(\)/);
+assert.match(code, /BinarySearchTree\(\s*\)/);
 ```
 
 You should assign the new instance of `BinarySearchTree` to the variable `bst`.
 
 ```js
-assert.match(code, /bst\s*=\s*BinarySearchTree\(\)/);
+assert.match(code, /bst\s*=\s*BinarySearchTree\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
index 4c7f1676c27..8d29f6d4836 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
@@ -20,7 +20,7 @@ assert.match(code, /nodes/);
 Your `node` variable should have the value `[50, 30, 20, 40, 70, 60, 80]`.
 
 ```js
-assert.match(code, /nodes\s*=\s*\[50,\s*30,\s*20,\s*40,\s*70,\s*60,\s*80\]/);
+assert.match(code, /nodes\s*=\s*\[\s*50\s*,\s*30\s*,\s*20\s*,\s*40\s*\s*,\s*70\s*,\s*60\s*,\s*80\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
index 32b2f2a450b..32a145ce809 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
@@ -16,7 +16,7 @@ This recursive call explores the entire right subtree in an in-order manner.
 You should call `_inorder_traversal` passing `node.right` and `result` as the arguments.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.right,\s*result\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.right,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
index 387e5cef4b7..f0878d8e559 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
@@ -16,7 +16,7 @@ To change that to print a useful value, define another method named `__str__` in
 You should define a method `__str__` that takes a single argument `self`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+__str__\(self\)/);
+assert.match(code, /def\s+__str__\(\s*self\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
index a0dd8dd7b6a..cae7381e0b5 100644
--- a/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
+++ b/curriculum/challenges/italian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
@@ -14,7 +14,7 @@ In the body of the `__str__` method, delete `pass` and return the result of call
 You should return the string value of `self.key` from your `__str__` method.
 
 ```js
-({ test: () => assert.match(code, /^\s{8}return\s+str\(self\.key\)/m) })
+({ test: () => assert.match(code, /^\s{8}return\s+str\(\s*self\.key\s*\)/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md b/curriculum/challenges/italian/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
index fd3a2bfd184..c6cbf74e30c 100644
--- a/curriculum/challenges/italian/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
+++ b/curriculum/challenges/italian/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
@@ -13,16 +13,12 @@ Well done! You have completed the final part of the _Registration Form_ practice
 
 # --hints--
 
-You should use an `a` element selector.
-
-```js
-assert.exists(new __helpers.CSSHelp(document).getStyle('a'));
-```
 
 You should give the `a` element a `color` of `#dfdfe2`.
 
 ```js
-assert.equal(new __helpers.CSSHelp(document).getStyle('a')?.color, 'rgb(223, 223, 226)');
+const linkElement = document.querySelector("a");
+assert.equal(window.getComputedStyle(linkElement)?.color, 'rgb(223, 223, 226)');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
index 09412cc3a31..0ea718d968a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
@@ -10,11 +10,9 @@ dashedName: build-a-cash-register
 
 Here you'll build a cash register app that will return change to the customer based on the price of the item, the amount of cash provided by the customer, and the amount of cash in the cash drawer. You'll also need to show different messages to the user in different scenarios, such as when the customer provides too little cash or when the cash drawer doesn't have enough to issue the correct change.
 
-There are a few variables you'll need to use in your code:
+In the `script.js` file, you have been provided with the `price` and `cid` variables. The `price` variable is the price of the item, and the `cid` variable is the cash-in-drawer, which is a 2D array listing the available currency in the cash drawer.
 
-- `price`: the price of the item as a floating point number.
-- `cash`: the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
-- `cid`: cash-in-drawer, a 2D array listing available currency in the cash drawer.
+The other variable you will need add is the `cash` variable, which is the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
 
 If you'd like to test your application with different values for `price` and `cid`, make sure to declare them with the `let` keyword so they can be reassigned by our tests.
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
index 3893c47eddb..6edb4556327 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
@@ -28,10 +28,10 @@ In this project, you'll build an app that will search for Pokémon by name or ID
 1. You should have an element with an `id` of `special-defense`
 1. You should have an element with an `id` of `speed`
 1. When the `#search-input` element contains the value `Red` and the `#search-button` element is clicked, an alert should appear with the text `Pokémon not found`
-1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
+1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the `#types` element should contain a single inner element with the value `ELECTRIC`. The `#types` element content should be cleared between searches
-1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
+1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed`elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the `#types` element should contain two inner elements with the text values `GHOST` and `POISON`, respectively. The `#types` element content should be cleared between searches
 
@@ -158,7 +158,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
+When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
 
 ```js
 async () => {
@@ -251,7 +251,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
+When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
 
 ```js
 async () => {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
index 9b862a37f04..eae4ac5ae2c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
@@ -11,7 +11,7 @@ Ora che hai il valore dell'input, devi dividerlo in un array di numeri. Usa il m
 
 Il metodo `.split()` prende una stringa e la divide in un array di stringhe. Puoi passargli una stringa di caratteri o una RegEx da usare come separatore. Ad esempio, `string.split(",")` divide la stringa a ogni virgola e restituisce un array di stringhe.
 
-Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces seperating your values. Memorizza l'array in una variabile `array`.
+Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces separating your values. Memorizza l'array in una variabile `array`.
 
 # --hints--
 
@@ -36,7 +36,7 @@ assert.match(code.toString(),  /array\s*=\s*value\.split()/);
 You should use `/,\s*/g` for the `split()` method's separator.
 
 ```js
-assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\)/);
+assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
index 75ff142364e..5421f8fadbf 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
@@ -22,7 +22,7 @@ assert.match(calculate.toString(), /numbers/);
 Dovresti usare il metodo `.map()` sulla variabile `array`.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\)/);
+assert.match(calculate.toString(), /array\.map\(\s*\)/);
 ```
 
 Dovresti assegnare il risultato della chiamata `.map()` alla variabile `numbers`.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
index ec9eccd7b34..6e502d6bb5c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
@@ -24,7 +24,7 @@ Aggiungi al metodo `.map()` una funzione callback che converte ogni elemento in
 Your `.map()` method should have a callback function which takes an `el` parameter.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 La funzione callback dovrebbe utilizzare il costruttore `Number` per convertire `el` in un numero.
@@ -42,7 +42,7 @@ assert.notMatch(calculate.toString(), /new/);
 La funzione callback dovrebbe restituire l'elemento convertito in un numero.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
index 8aa165afd6a..9fcdf9126b2 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
@@ -24,13 +24,13 @@ assert.match(calculate.toString(), /filtered/);
 La funzione `calculate` dovrebbe chiamare il metodo `.filter()` sull'array `numbers`.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\)/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*\)/)
 ```
 
 Dovresti assegnare il risultato di `numbers.filter()` alla variabile `filtered`.
 
 ```js
-assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\)/);
+assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
index 0e52d007840..c9e2fa3acb3 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
@@ -26,7 +26,7 @@ Aggiungi al metodo `.filter()` una funzione callback che restituisce `true` se l
 Your `.filter()` method should have a callback which accepts `el` as a parameter.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use `!` and `isNaN()` to check if `el` is NOT `NaN`.
@@ -38,7 +38,7 @@ assert.match(calculate.toString(), /!\s*(Number\.)?isNaN\(\s*el\s*\)/);
 La funzione callback dovrebbe restituire gli elementi che non sono `NaN`.
 
 ```js
-assert.match(calculate.toString(), /(numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
index a1245c5458f..55f7b6a8f1e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
@@ -28,20 +28,19 @@ assert.notMatch(calculate.toString(), /filtered/);
 Dovresti concatenare la chiamata `.filter()` alla chiamata `.map()`.
 
 ```js
-console.log(calculate.toString());
 assert.match(calculate.toString(), /array\.map\(.*\)\.filter\(/s);
 ```
 
 Non dovresti rimuovere la funzione callback di `.map()`.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 Non dovresti rimuovere la funzione callback di `.filter()`.
 
 ```js
-assert.match(calculate.toString(), /(\.filter\(\(?\s*el\s*\)?\s*=>|\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
+assert.match(calculate.toString(), /(\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
index 30268d15b48..578a5418064 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
@@ -22,13 +22,13 @@ assert.match(getMean.toString(), /sum/);
 Your `getMean` function should use the `.reduce()` method of the `array` parameter.
 
 ```js
-assert.match(getMean.toString(), /array\.reduce\(\)/);
+assert.match(getMean.toString(), /array\.reduce\(\s*\)/);
 ```
 
 Dovresti assegnare il risultato di `array.reduce()` alla variabile `sum`.
 
 ```js
-assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\)/);
+assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
index d8ac93bd97d..44ba34e0b7e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
@@ -22,13 +22,13 @@ Per la variabile `sum`, passa a `.reduce()` una callback che prende come paramet
 Your `reduce` method should have a callback function which takes an `acc` and an `el` parameters.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)/)
 ```
 
 Il metodo `reduce` dovrebbe restituire la somma di `acc` e `el`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
index 13188ff40be..536359ac8cc 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
@@ -22,7 +22,7 @@ Imposta il valore iniziale dell'accumulatore a `0`.
 Il metodo `reduce` dovrebbe avere `0` come valore iniziale.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
index ba12b4fbb5f..7a29570a18d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
@@ -28,19 +28,19 @@ assert.notMatch(getMean.toString(), /mean\s*=/);
 Non dovresti cambiare la logica all'interno del metodo `reduce`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 Dovresti dividere il risultato del metodo `reduce` per la lunghezza dell'array.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)\s*\/\s*array\.length/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 Dovresti usare la sintassi di return implicito per restituire direttamente il risultato di `reduce` diviso per la lunghezza dell'array.
 
 ```js
-assert.match(code, /const\s+getMean\s*=\s*\(?array\)?\s*=>\s*array\.reduce\(\(acc\s*,\s*el\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
+assert.match(code, /const\s+getMean\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
index cd77e877fad..b8e42661940 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
@@ -18,13 +18,13 @@ Per ordinare i numeri dal più piccolo al più grande, passa una funzione callba
 Your `sort` method should have a callback function which takes an `a` and a `b` parameters.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)/)
 ```
 
 Il metodo `sort` dovrebbe restituire il risultato della sottrazione di `b` da `a`.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
index d7fd8b4133b..e6bbbe816e1 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
@@ -34,13 +34,13 @@ assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0
 If `array.length` is even, pass an array with the two middle numbers from the `sorted` array to the `getMean` function. The first item in the array argument should be the value at index `array.length / 2` from `sorted` and the second should use the value at the index `array.length / 2 - 1` from `sorted`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:/);
 ```
 
 Se `array.length` è dispari, la variabile `median` dovrebbe assegnare il numero centrale alla variabile `median`. Il numero centrale è il valore di `sorted` a `Math.floor(array.length / 2)`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:\s*sorted\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\)\];/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:\s*sorted\s*\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\s*\)\s*\]\s*;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
index 5505762fde7..0558f633d55 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
@@ -22,13 +22,13 @@ assert.match(calculate.toString(), /median\s*=/);
 Alla variabile `median` dovrebbe essere assegnato il valore di `getMedian(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /median\s*=\s*getMedian\(numbers\)/);
+assert.match(calculate.toString(), /median\s*=\s*getMedian\(\s*numbers\s*\)/);
 ```
 
 La funzione `calculate` dovrebbe selezionare nel DOM l'elemento `#median` e impostarne il `textContent` su `median`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#median\1\)\.textContent\s*=\s*median/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#median\1\s*\)\.textContent\s*=\s*median/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
index 1cb32ea0163..919865016e4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
@@ -22,14 +22,13 @@ assert.match(getMode.toString(), /array\.forEach\(/);
 Your `.forEach()` method should have a callback function which takes an `el` parameter.
 
 ```js
-console.log(getMode.toString());
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)/);
 ```
 
 Il metodo `.forEach()` dovrebbe incrementare il conteggio per ogni numero. Non dimenticare il valore di fallback.
 
 ```js
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)\s*\{?\s*(return)?\s*counts\[\s*el\s*\]\s*=\s*\(\s*counts\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)\s*\{?\s*(return)?\s*counts\s*\[\s*el\s*\]\s*=\s*\(\s*counts\s*\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
index c4d5c67ec91..0ca82b41848 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
@@ -24,19 +24,19 @@ assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.so
 La funzione `getMode` dovrebbe passare una callback al metodo `sort` con i parametri `a` e `b`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)/)
 ```
 
 La funzione `getMode` dovrebbe usare il metodo `sort` per riordinare l'array `Object.keys()` e restituire il valore di `counts[b]` meno il valore di `counts[a]`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)/)
 ```
 
 La variabile `highest` dovrebbe avere il valore della prima voce nell'array `Object.keys(counts)` ordinato.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)\[0\];/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)\s*\[\s*0\s*\]\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
index a62fafca598..f64aab8a3fd 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
@@ -20,13 +20,13 @@ assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filte
 Il metodo `.filter()` dovrebbe prendere una funzione callback con un parametro `el`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)/);
 ```
 
 Il metodo `.filter()` dovrebbe restituire se il valore di `counts[el]` è uguale a `counts[highest]`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\[\s*el\s*\]\s*===\s*counts\[\s*highest\s*\];\s*\}/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\s*\[\s*el\s*\]\s*===\s*counts\s*\[\s*highest\s*\]\s*;\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
index 930ec13ffea..51822e99c0a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /mode\s*=\s*getMode\(\s*numbers\s*\);/);
 La funzione `calculate` dovrebbe selezionare nel DOM l'elemento `#mode` e impostare `textContent` su `mode`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#mode\1\)\.textContent\s*=\s*mode;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#mode\1\s*\)\.textContent\s*=\s*mode;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
index fee48ed138d..a6b2924bedf 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
@@ -12,7 +12,10 @@ Il tuo prossimo calcolo è l'<dfn>intervallo</dfn>, che è la differenza tra il
 Precedentemente hai conosciuto l'oggetto globale `Math`. `Math` ha un metodo `.min()` per ottenere il numero più piccolo da una serie di numeri e il metodo `.max()` per ottenere il numero più grande. Ecco un esempio in cui si ottiene il numero più piccolo da un array:
 
 ```js
-Math.min(1, 9, 11, -3, 0.5);
+const numbersArr = [2, 3, 1];
+
+console.log(Math.min(...numbersArr));
+// Expected output: 1
 ```
 
 Dichiara una funzione `getRange` che prende lo stesso parametro `array` che stavi usando. Usando `Math.min()`, `Math.max()` e l'operatore spread, restituisci la differenza tra il numero più grande e il numero più piccolo nella lista.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
index 19679aa9675..188521074ba 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
@@ -14,13 +14,13 @@ Aggiungi la logica per calcolare e visualizzare l'intervallo alla funzione `calc
 La funzione `calculate` dovrebbe impostare una variabile `range` con il risultato di `getRange(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /range\s*=\s*getRange\(numbers\);/);
+assert.match(calculate.toString(), /range\s*=\s*getRange\(\s*numbers\s*\);/);
 ```
 
 La funzione `calculate` dovrebbe impostare il `textContent` dell'elemento `#range` con la variabile `range`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#range\1\)\.textContent\s*=\s*range;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#range\1\s*\)\.textContent\s*=\s*range;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
index 9ad45c5a8e4..b75a36d09bf 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
@@ -26,13 +26,13 @@ assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(/);
 La variabile `differences` dovrebbe utilizzare il parametro `el` nella funzione callback.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 La callback di `map` dovrebbe restituire il valore di `el` meno `mean`.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
index 0a5754e69fa..0f8078438a8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
@@ -28,13 +28,13 @@ assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\
 La variabile `squaredDifferences` dovrebbe utilizzare il parametro `el` nella funzione callback.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 La callback di `map` dovrebbe restituire il valore di `el` al quadrato.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
 ```
 
 La callback di `map` dovrebbe utilizzare l'operatore `**`.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
index 83f5f4727ad..c4c02e691fe 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
@@ -28,14 +28,13 @@ assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDiffere
 La variabile `sumSquaredDifferences` dovrebbe utilizzare i parametri `acc` e `el` nella funzione callback.
 
 ```js
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 La callback di `reduce` dovrebbe restituire la somma di `acc` e `el`.
 
 ```js
-console.log(getVariance.toString());
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
index ebd40b3efb9..308366ff393 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
@@ -46,19 +46,19 @@ assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(/);
 La variabile `variance` dovrebbe utilizzare i parametri `acc` e `el` nella funzione callback.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 La callback di `reduce` dovrebbe essere una funzione vuota.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}/);
 ```
 
 La callback di `reduce` dovrebbe avere un valore iniziale di `0`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}\s*,\s*0\s*\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
index 04b31cba879..2fc0e3479f9 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
@@ -14,37 +14,37 @@ All'interno della callback vuota di `.reduce()`, dichiara una variabile `differe
 La callback di `reduce` dovrebbe avere una variabile `difference`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=/);
 ```
 
 La variabile `difference` dovrebbe essere impostata con il valore di `el` meno `mean`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
 ```
 
 La callback di `reduce` dovrebbe avere una variabile `squared`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
 ```
 
 La variabile `squared` dovrebbe essere impostata sul valore di `difference` elevata alla potenza di 2.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
 ```
 
 La callback di `reduce` dovrebbe restituire il valore di `acc` più `squared`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
 ```
 
 Non dovresti rimuovere il valore iniziale di `0` dal metodo `.reduce()`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
index 6cd13aafa75..057f9a2f449 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
@@ -16,7 +16,7 @@ Dividi la chiamata `.reduce()` per la lunghezza dell'array (nella dichiarazione
 Dovresti dividere il risultato della chiamata `.reduce()` per la lunghezza dell'array.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)\s*\/\s*array\.length;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)\s*\/\s*array\.length;/);
 ```
 
 Dovresti restituire il valore di `variance`.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
index e0af472a878..99d8fa80539 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /variance\s*=\s*getVariance\(\s*numbers\s*\)/
 Dovresti impostare il `textContent` dell'elemento `#variance` con il valore della variabile `variance`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#variance\1\)\.textContent\s*=\s*variance/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#variance\1\s*\)\.textContent\s*=\s*variance/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
index 5530227b162..0c538bb8d26 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
@@ -14,13 +14,13 @@ Ora aggiorna la funzione `calculate` per includere la logica della deviazione st
 La funzione `calculate` dovrebbe avere una variabile `standardDeviation` impostata con il risultato di `getStandardDeviation(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(numbers\)/);
+assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(\s*numbers\s*\)/);
 ```
 
 Dovresti aggiornare il `textContent` dell'elemento `#standardDeviation` con la variabile `standardDeviation`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#standardDeviation\1\)\.textContent\s*=\s*standardDeviation/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#standardDeviation\1\s*\)\.textContent\s*=\s*standardDeviation/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
index 44ee6fb910a..c91d4291f45 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
@@ -16,19 +16,19 @@ Per risolvere questo problema, aggiungi una chiamata vuota `.slice()` prima del
 Dovresti chiamare `.slice()` sul parametro `array`.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)/);
 ```
 
 La chiamata `.sort()` dovrebbe essere concatenata alla chiamata `.slice()`.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(/);
 ```
 
 Non dovresti modificare la funzione callback di `.sort()`.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
index 034d5d9ec72..4d7b02969ec 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
@@ -24,7 +24,7 @@ Use the `async` keyword to create an asynchronous arrow function called `fetchDa
 You should use the `async` keyword to create an asynchronous arrow function called `fetchData`.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*[^}]*\s*}/);
 ```
 
 `fetchData` should be defined.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
index 4994bfbe6bc..72e5d60b9f1 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
@@ -37,7 +37,7 @@ assert.match(code, /\s*const\s+res\s*=\s*await\s+fetch\(\s*(.*)\s*\)/);
 You should pass in the `forumLatest` constant to the `fetch` call.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
index 39e052aafbb..879d274da32 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+data/);
 You should assign `await res.json()` to the `data` variable.
 
 ```js
-assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\);?\s*/);
+assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
index f4f6955fd9c..eaefac7e396 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
@@ -28,7 +28,7 @@ assert.match(code, /\s*try\s*{[\s\S]*\s*console\.log\(\s*data\s*\)[\s\S]*}\s*cat
 You should call the `fetchData()` function, after the `fetchData()` function is defined.
 
 ```js
-assert.match(code, /};?\s*fetchData\(\)/);
+assert.match(code, /};?\s*fetchData\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
index 6f33dc4df55..5199383f511 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
@@ -22,7 +22,7 @@ assert.match(code, /\s*showLatestPosts\(.*\);??\s*/);
 You should pass `data` as the argument to `showLatestsPosts()`.
 
 ```js
-assert.match(code, /\s*showLatestPosts\(data\);?\s*/);
+assert.match(code, /\s*showLatestPosts\(\s*data\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
index 5c93c46da59..1187a3b28b3 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
@@ -20,7 +20,7 @@ assert.match(code, /\s*const\s+thousands\s*=/);
 Your should assign `Math.floor(views / 1000)` to your `thousands` variable.
 
 ```js
-assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(views\s*\/\s*1000\)\s*/);
+assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(\s*views\s*\/\s*1000\s*\)\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
index cd8d2c6a51c..e932986386d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
@@ -14,7 +14,7 @@ Inside the `if` statement, destructure `className` and `category` from the `allC
 You should destructure `className` and `category` from the `allCategories[id]` object. The properties can be in any order.
 
 ```js
-assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\[id\]\s*/g));
+assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\s*\[\s*id\s*\]\s*/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
index eaee0b3bd53..a0ed095c7c8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
@@ -27,19 +27,19 @@ Inside your `fetchData` function, add a `try...catch` statement. The `catch` blo
 You should have a `try` block inside your `fetchData` function.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
 ```
 
 You should have a `catch` block after your `try` block.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
 ```
 
 Your `catch` block should have an `err` parameter.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
 ```
 
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
index c2655b3772f..d15cf232a63 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+postsContainer\s*=/);
 You should use `document.getElementById()` to get the `#posts-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)posts-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/);
 ```
 
 You should assign the `#posts-container` element to your `postsContainer` variable.
 
 ```js
-assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(('|"|`)posts-container\1\)/g));
+assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
index a0824ede6be..0925acf8654 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
@@ -14,7 +14,7 @@ Lo userai come event listener per `sortButton`. Dato che gli elementi associati
 La funzione `sortInputArray` dovrebbe chiamare `event.preventDefault()`.
 
 ```js
-assert.match(sortInputArray.toString(), /event\.preventDefault\(\)/);
+assert.match(sortInputArray.toString(), /event\.preventDefault\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
index 36c6102e66f..a6db93a354f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*
 Dovresti assegnare a `temp` il valore di `array[j]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?/);
 ```
 
 Dovresti assegnare a `array[j]` il valore di `array[j + 1]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?/);
 ```
 
 Dovresti assegnare a `array[j + 1]` il valore di `temp`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
index f6fdf5a2fe4..b69a47b0a0e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
@@ -14,7 +14,7 @@ Infine, una volta terminata l'esecuzione del loop interno, restituisci l'array o
 Dovresti restituire con `return` la variabile `array`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
index 82b86b9f375..d0b205cbeb0 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
@@ -17,7 +17,7 @@ Dovresti rimuovere la chiamata di `console.log()`.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(bubbleSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(bubbleSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
index 615a8975a9e..24c5b69bebf 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{
 Dovresti assegnare `array[i]` a `temp`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]/)
 ```
 
 Dovresti assegnare `array[minIndex]` a `array[i]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]/)
 ```
 
 Dovresti assegnare `temp` a `array[minIndex]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
index 66cb9b11f49..2ea4a1bc1c8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
@@ -14,7 +14,7 @@ Infine, una volta terminata l'esecuzione del loop esterno, devi restituire l'arr
 Dovresti usare `return` per restituire l'`array` una volta terminato il loop esterno.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
index 453df5f3cfc..22ed4f36278 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
@@ -15,7 +15,7 @@ Dovresti rimuovere l'istruzione `console.log()` da `selectionSort()`.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(selectionSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(selectionSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
index 174c654ad5a..e55ea231742 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
@@ -16,7 +16,7 @@ Fallo assegnando il valore all'indice `j` all'indice successivo.
 Prima di decrementare `j`, assegna il valore a `j` all'indice `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
index 8964e27df4a..a06a51f0f23 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
@@ -16,7 +16,7 @@ Usa l'operatore di assegnazione per inserire il valore corrente all'indice corre
 Dovresti assegnare `currValue` all'indice `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
+assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
index fdc3fe89b8b..ed793cb6f33 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
@@ -14,7 +14,7 @@ Una volta che il loop `for` è terminato, devi restituire l'array. Una volta fat
 Dovresti restituire con `return` l'`array`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
index 6875b291c8e..2a0f74e4dea 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
@@ -11,7 +11,7 @@ Uno degli strumenti più potenti è la tua console per sviluppatori. A seconda d
 
 La console per sviluppatori include gli errori generati dal tuo codice, ma puoi anche usarla per vedere i valori delle variabili nel codice, che è molto utile per il debugging.
 
-Aggiungi la riga `console.log("Hello World");` tra i tag `script`. Quindi clicca sul pulsante "Console" per aprire la console. Dovresti vedere il testo `Hello World`.
+Aggiungi la riga `console.log("Hello World");` tra i tag `script`. Quindi clicca sul pulsante "Console" per aprire la console. You should see the text `"Hello World"`.
 
 Nota come la riga termina con un punto e virgola. È un pratica comune in JavaScript terminare le righe di codice con un punto e virgola.
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
index d401aff1975..398dad6195a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
@@ -10,10 +10,10 @@ dashedName: step-7
 Alle variabili può essere <dfn>assegnato</dfn> un valore. Se lo fai quando le dichiari, si parla di <dfn>inizializzazione</dfn>. Ad esempio:
 
 ```js
-let camperbot = "Bot";
+let age = 32;
 ```
 
-Questo codice inizializza la variabile `camperbot` con il valore `Bot`, una stringa.
+This would initialize the `age` variable with a value of `32`, a number.
 
 Inizializza la variabile `xp` con il valore `0`, un numero.
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
index 2bad35657e1..35046844a5a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
@@ -15,7 +15,7 @@ let order = ["first", "second", "third"];
 
 Questo è un array che contiene tre valori. Nota che i valori sono separati da una virgola.
 
-Cambia la variabile `inventory` in modo che sia un array con le stringhe `stick`, `dagger` e `sword`.
+Change your `inventory` variable to be an array with the strings `"stick"`, `"dagger"`, and `"sword"`.
 
 # --hints--
 
@@ -31,19 +31,19 @@ La variabile `inventory` dovrebbe contenere tre valori.
 assert.lengthOf(inventory, 3);
 ```
 
-La variabile `inventory` dovrebbe includere la stringa `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
 ```
 
-La variabile `inventory` dovrebbe includere la stringa `dagger`.
+Your `inventory` variable should include the string `"dagger"`.
 
 ```js
 assert.include(inventory, "dagger");
 ```
 
-La variabile `inventory` dovrebbe includere la stringa `sword`.
+Your `inventory` variable should include the string `"sword"`.
 
 ```js
 assert.include(inventory, "sword");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
index 589843a0894..efb3eb42c68 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-Per ora, vuoi che il giocatore inizi solo con `stick`. Cambia l'array `inventory` in modo che abbia soltanto il valore `stick`.
+For now, you want the player to start with just the `"stick"`. Change the `inventory` array to have `"stick"` as its only value.
 
 # --hints--
 
@@ -23,7 +23,7 @@ La variabile `inventory` dovrebbe contenere solo un valore.
 assert.lengthOf(inventory, 1);
 ```
 
-La variabile `inventory` dovrebbe includere la stringa `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
index d748fe6d0ba..636e5887309 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
@@ -33,10 +33,10 @@ Dovresti usare `document.querySelector()`.
 assert.match(code, /document\.querySelector/);
 ```
 
-Dovresti usare un selettore`#button1`.
+You should use the `"#button1"` selector.
 
 ```js
-assert.match(code, /querySelector\(('|")#button1\1\)/);
+assert.match(code, /querySelector\(\s*('|")#button1\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
index ec9bd30eeed..d6651349cfc 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
@@ -9,12 +9,14 @@ dashedName: step-40
 
 `button1` rappresenta il primo elemento `button`. Questi elementi possiedono una proprietà particolare chiamata `onclick`, che puoi usare per determinare cosa accade quando qualcuno clicca il pulsante.
 
-Puoi accedere alle proprietà in JavaScript in un paio di modi diversi. Il primo è con la <dfn>dot notation</dfn> (notazione con punto). Il modo per accedere alla proprietà `onclick` di un elemento button sarà:
+Puoi accedere alle proprietà in JavaScript in un paio di modi diversi. Il primo è con la <dfn>dot notation</dfn> (notazione con punto). Here is an example of using dot notation to set the `onclick` property of a button to a function reference.
 
 ```js
-button.onclick
+button.onclick = myFunction;
 ```
 
+In this example, `button` is the button element, and `myFunction` is a reference to a function. When the button is clicked, `myFunction` will be called.
+
 Use dot notation to set the `onclick` property of your `button1` to the function reference of `goStore`. Note that `button1` is already declared, so you don't need to use `let` or `const`.
 
 # --hints--
@@ -31,10 +33,10 @@ Non dovresti usare `let` o `const`.
 assert.notMatch(code, /(let|const)\s+button1\.onclick/);
 ```
 
-You should assign the `goStore` function reference to `button1.onclick`.
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button1\.onclick\s*=\s*goStore/);
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
index 7ac7f1821b1..bba31975808 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
@@ -13,6 +13,12 @@ Una volta fatto ciò, apri la console e prova a cliccare i pulsanti del tuo prog
 
 # --hints--
 
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
+
+```js
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
+```
+
 Dovresti usare la dot notation per accedere alla proprietà `onclick` di `button2`.
 
 ```js
@@ -25,10 +31,10 @@ Non dovresti usare `let` o `const` per assegnare `button2.onclick`.
 assert.notMatch(code, /(let|const)\s+button2\.onclick/);
 ```
 
-Dovresti impostare la proprietà `onclick` di `button2` sulla variabile `goCave`.
+You should assign the `goCave` function reference to `button2.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button2\.onclick\s*=\s*goCave/);
+assert.match(code, /button2\.onclick\s*=\s*goCave\s*;?\s*$/m);
 ```
 
 Dovresti usare la dot notation per accedere alla proprietà `onclick` di `button3`.
@@ -43,10 +49,10 @@ Non dovresti usare `let` o `const` per assegnare `button3.onclick`.
 assert.notMatch(code, /(let|const)\s+button3\.onclick/);
 ```
 
-Dovresti impostare la proprietà `onclick` di `button3` sulla variabile `fightDragon`.
+You should assign the `fightDragon` function reference to `button3.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button3\.onclick\s*=\s*fightDragon/);
+assert.match(code, /button3\.onclick\s*=\s*fightDragon\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
index 5a5f998fec2..ad6f95c3394 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-Per ora, fai in modo che l'output della funzione `goStore` sia il messaggio `Going to store.` sulla console. Ad esempio, ecco una funzione il cui output è il messaggio `Hello World`.
+For now, make your `goStore` function output the message `"Going to store."` to the console. For example, here is a function that outputs the message `"Hello World"`.
 
 ```js
 function functionName() {
@@ -20,13 +20,13 @@ function functionName() {
 Dovresti avere la riga `console.log("Going to store.");` nel tuo codice. Non dimenticare il punto e virgola.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to store\.\1\);/);
+assert.match(code, /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 La riga `console.log("Going to store.");` dovrebbe essere nella funzione `goStore`.
 
 ```js
-assert.match(goStore.toString(), /console\.log\(('|")Going to store\.\1\);/);
+assert.match(goStore.toString(), /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
index 5b395da39db..9a16d7e347d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
@@ -7,7 +7,7 @@ dashedName: step-37
 
 # --description--
 
-Adesso crea una funzione `goCave` che stampa `Going to cave.` sulla console.
+Now create a `goCave` function that prints `"Going to cave."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(goCave);
 Dovresti avere la riga `console.log("Going to cave.");` nel tuo codice.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 La riga `console.log("Going to cave.");` dovrebbe essere nella funzione `goCave`.
 
 ```js
-assert.match(goCave.toString(), /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(goCave.toString(), /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
index 12e18cf61cc..6501af415ee 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
@@ -7,7 +7,7 @@ dashedName: step-38
 
 # --description--
 
-Adesso crea una funzione `fightDragon` che stampa `Fighting dragon.` sulla console.
+Now create a `fightDragon` function that prints `"Fighting dragon."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(fightDragon);
 Dovresti avere la riga `console.log("Fighting dragon.");` nel tuo codice.
 
 ```js
-assert.match(code, /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 La riga `console.log("Fighting dragon.");` dovrebbe essere nella funzione `fightDragon`.
 
 ```js
-assert.match(fightDragon.toString(), /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(fightDragon.toString(), /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
index 363938db9c6..11d4a318d41 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
@@ -9,21 +9,25 @@ dashedName: step-42
 
 La proprietà `innerText` controlla il testo che appare in un elemento HTML. Ad esempio:
 
-```js
-const info = document.querySelector("#info");
-info.innerText = "Hello World";
+```html
+<p id="info">Demo content</p> 
 ```
 
-Questo codice cambia l'elemento assegnato alla variabile `info` in modo che abbia il testo `Hello World`.
+```js
+const info = document.querySelector("#info"); 
+info.innerText = "Hello World"; 
+```
 
-Quando un giocatore clicca sul pulsante `Go to store`, vuoi che cambino i pulsanti e il testo. Rimuovi il codice nella funzione `goStore` e aggiungi una riga che aggiorna il testo di `button1` in `Buy 10 health (10 gold)`.
+The following example would change the text of the `p` element from `Demo content` to `Hello World`.
+
+Quando un giocatore clicca sul pulsante `Go to store`, vuoi che cambino i pulsanti e il testo. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `"Buy 10 health (10 gold)"`.
 
 # --hints--
 
 Non dovresti avere la riga `console.log("Going to store.");` nel tuo codice.
 
 ```js
-assert.notMatch(code, /console\.log\(('|")Going to store\.\1\)/);
+assert.notMatch(code, /console\.log\(\s*('|")Going to store\.\1\s*\)/);
 ```
 
 Dovresti usare la dot notation per accedere alla proprietà `innerText` di `button1`.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
index 7414d7c4deb..83a14cca5f4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Ora aggiungi una riga che aggiorna il testo di `button2` in `Buy weapon (30 gold)` e aggiorna il testo di `button3` in `Go to town square`.
+Now, add a line that updates the text of `button2` to say `"Buy weapon (30 gold)"` and update the text of `button3` to say `"Go to town square"`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ Non dovresti usare `let` o `const` per accedere alla proprietà `innerText` di `
 assert.notMatch(code, /(let|const)\s+button2\.innerText/);
 ```
 
-Dovresti aggiornare la proprietà `innerText` di `button2` in modo che sia `Buy weapon (30 gold)`.
+You should update the `innerText` property of `button2` to be `"Buy weapon (30 gold)"`.
 
 ```js
 assert.match(code, /button2\.innerText\s*=\s*('|")Buy weapon \(30 gold\)\1/);
@@ -47,7 +47,7 @@ Non dovresti usare `let` o `const` per accedere alla proprietà `innerText` di `
 assert.notMatch(code, /(let|const)\s+button3\.innerText/);
 ```
 
-Dovresti aggiornare la proprietà `innerText` di `button3` in modo che sia `Go to town square`.
+You should update the `innerText` property of `button3` to be `"Go to town square"`.
 
 ```js
 assert.match(code, /button3\.innerText\s*=\s*('|")Go to town square\1/);
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
index f20462a469c..ff8ec1ff431 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Ora devi modificare il testo mostrato. Cambia il valore della proprietà `innerText` di `text` in `You enter the store.`.
+Ora devi modificare il testo mostrato. Change the `innerText` property of the `text` to be `"You enter the store."`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ Non dovresti usare `let` o `const` per accedere alla proprietà `innerText` di `
 assert.notMatch(code, /(let|const)\s+text\.innerText/);
 ```
 
-Dovresti aggiornare la proprietà `innerText` di `text` in modo che sia `You enter the store.`.
+You should update the `innerText` property of `text` to be `"You enter the store."`.
 
 ```js
 assert.match(code, /text\.innerText\s*=\s*('|")You enter the store.\1/);
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
index db06410bf92..bcbdc76462e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
@@ -7,25 +7,25 @@ dashedName: step-48
 
 # --description--
 
-Nella funzione `goTown`, cambia le proprietà `innerText` degli elementi `button` in `Go to store`, `Go to cave` e `Fight dragon`. Aggiorna le proprietà `onclick` rispettivamente in `goStore`, `goCave` e `fightDragon`.
+In your `goTown` function, change your `button` elements' `innerText` properties to be `"Go to store"`, `"Go to cave"`, and `"Fight dragon"`. Aggiorna le proprietà `onclick` rispettivamente in `goStore`, `goCave` e `fightDragon`.
 
-Finally, update `innerText` property of your `text` to be `You are in the town square. You see a sign that says Store.`.
+Finally, update `innerText` property of your `text` to be `"You are in the town square. You see a sign that says Store."`.
 
 # --hints--
 
-Dovresti impostare la proprietà `button1.innerText` su `Go to store` nella funzione `goTown`.
+You should set the `button1.innerText` property to be `"Go to store"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-Dovresti impostare la proprietà `button2.innerText` su `Go to cave` nella funzione `goTown`.
+You should set the `button2.innerText` property to be `"Go to cave"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-Dovresti impostare la proprietà `button3.innerText` su `Fight dragon` nella funzione `goTown`.
+You should set the `button3.innerText` property to be `"Fight dragon"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -49,7 +49,7 @@ Dovresti impostare la proprietà `button3.onclick` su `fightDragon` nella funzio
 assert.match(goTown.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-Dovresti impostare la proprietà `text.innerText` su `You are in the town square. You see a sign that says Store.` nella funzione `goTown`.
+You should set the `text.innerText` property to be `"You are in the town square. You see a sign that says Store."` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /text\.innerText\s*=\s*('|")You are in the town square. You see a sign that says Store\.\1/);
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
index e42c302015a..f4d0b645e42 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
@@ -28,7 +28,7 @@ assert.match(code, /function\s+update/);
 La funzione `update` dovrebbe prendere un parametro chiamato `location`.
 
 ```js
-assert.match(update.toString(), /update\(location\)/);
+assert.match(update.toString(), /update\(\s*location\s*\)/);
 ```
 
 La funzione `update` dovrebbe essere vuota.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
index 0f9f1d2331d..96f0397e677 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Le <dfn>proprietà</dfn> degli oggetti sono scritte come coppie `key: value`, dove `key` è il nome della proprietà (o chiave), e `value` è il valore che la proprietà contiene. Ad esempio, ecco un oggetto con una chiave `name` impostata sul valore `Quincy Larson`.
+Le <dfn>proprietà</dfn> degli oggetti sono scritte come coppie `key: value`, dove `key` è il nome della proprietà (o chiave), e `value` è il valore che la proprietà contiene. For example, here is an object with a key of `name` set to `"Quincy Larson"`.
 
 ```js
 {
@@ -15,7 +15,7 @@ Le <dfn>proprietà</dfn> degli oggetti sono scritte come coppie `key: value`, do
 }
 ```
 
-Aggiungi una proprietà `name` all'oggetto vuoto e dalle il valore `town square`.
+Add a `name` property to your empty object and give it a value of `"town square"`.
 
 # --hints--
 
@@ -31,7 +31,7 @@ Il primo valore di `locations` dovrebbe avere una proprietà `name`.
 assert.isDefined(locations[0].name);
 ```
 
-Il primo valore di `locations` dovrebbe avere una proprietà `name` con il valore `town square`.
+Your first value of `locations` should have a `name` property with a value of `"town square"`.
 
 ```js
 assert.equal(locations[0].name, "town square");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
index 0fa88412f5e..83ccf7987c1 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
@@ -25,19 +25,19 @@ assert.isString(locations[0]["button text"][1]);
 assert.isString(locations[0]["button text"][2]);
 ```
 
-Il primo valore nell'array di `button text` dovrebbe essere "Go to store".
+The first value in the `button text` array should be `"Go to store"`.
 
 ```js
 assert.equal(locations[0]["button text"][0], "Go to store");
 ```
 
-Il secondo valore nell'array di `button text` dovrebbe essere "Go to cave".
+The second value in the `button text` array should be `"Go to cave"`.
 
 ```js
 assert.equal(locations[0]["button text"][1], "Go to cave");
 ```
 
-Il terzo valore nell'array di `button text` dovrebbe essere "Fight dragon".
+The third value in the `button text` array should be `"Fight dragon"`.
 
 ```js
 assert.equal(locations[0]["button text"][2], "Fight dragon");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
index ed239679aa3..65b14070c03 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
@@ -23,7 +23,7 @@ La proprietà `text` dovrebbe essere una stringa.
 assert.isString(locations[0]["text"]);
 ```
 
-La proprietà `text` dovrebbe avere il valore `You are in the town square. You see a sign that says \"Store\".`
+Your `text` property should have the value `"You are in the town square. You see a sign that says \"Store\"."`
 
 ```js
 assert.equal(locations[0]["text"], "You are in the town square. You see a sign that says \"Store\".");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
index e747dc1ad8b..3aa87be45b1 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
@@ -37,7 +37,7 @@ Il secondo oggetto di `locations` dovrebbe avere una proprietà `button text` co
 assert.isArray(locations[1]["button text"]);
 ```
 
-I valori della proprietà `button text` dovrebbero essere le stringhe `Buy 10 health (10 gold)`, `Buy weapon (30 gold)` e `Go to town square`.
+Your `button text` property should have the string values `"Buy 10 health (10 gold)"`, `"Buy weapon (30 gold)"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[1]["button text"][0], "Buy 10 health (10 gold)");
@@ -65,7 +65,7 @@ Il secondo oggetto di `locations` dovrebbe avere una proprietà `text` con una s
 assert.isString(locations[1].text);
 ```
 
-Il secondo oggetto di `locations` dovrebbe avere una proprietà `text` con il valore `You enter the store.`.
+Your second `locations` object should have a `text` property with the value of `"You enter the store."`.
 
 ```js
 assert.equal(locations[1].text, "You enter the store.");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
index 24a0a656b4b..f427e2cabdd 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
@@ -11,19 +11,19 @@ Ora puoi consolidare una parte del tuo codice. Inizia copiando il codice dall'in
 
 # --hints--
 
-La funzione `update` dovrebbe impostare `button1.innerText` su `Go to store`.
+Your `update` function should set `button1.innerText` to `"Go to store"`.
 
 ```js
 assert.match(update.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-La funzione `update` dovrebbe impostare `button2.innerText` su `Go to cave`.
+Your `update` function should set `button2.innerText` to `"Go to cave"`.
 
 ```js
 assert.match(update.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-La funzione `update` dovrebbe impostare `button3.innerText` su `Fight dragon`.
+Your `update` function should set `button3.innerText` to `"Fight dragon"`.
 
 ```js
 assert.match(update.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -47,7 +47,7 @@ La funzione `update` dovrebbe impostare `button3.onclick` su `fightDragon`.
 assert.match(update.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-La funzione `update` dovrebbe impostare `text.innerText` su `You are in the town square. You see a sign that says \"Store\".`.
+Your `update` function should set `text.innerText` to `"You are in the town square. You see a sign that says \"Store\"."`.
 
 ```js
 assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town square. You see a sign that says \\"Store\\"\."/);
@@ -56,13 +56,13 @@ assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town squa
 La funzione `goTown` dovrebbe essere vuota.
 
 ```js
-assert.match(goTown.toString(), /function goTown\(\) \{\}/);
+assert.match(goTown.toString(), /function goTown\(\s*\) \{\}/);
 ```
 
 La funzione `goStore` dovrebbe essere vuota.
 
 ```js
-assert.match(goStore.toString(), /function goStore\(\) \{\}/);
+assert.match(goStore.toString(), /function goStore\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
index c35bb815236..c1235b647fc 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
@@ -20,13 +20,13 @@ myFunction();
 Dovresti chiamare la funzione `update` nella funzione `goTown`.
 
 ```js
-assert.match(goTown.toString(), /update\(\)/);
+assert.match(goTown.toString(), /update\(\s*\)/);
 ```
 
 Non dimenticare il punto e virgola alla fine.
 
 ```js
-assert.match(goTown.toString(), /update\(\);/);
+assert.match(goTown.toString(), /update\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
index 570a4eebfb2..d1b1c2d9159 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
@@ -20,7 +20,7 @@ Passa l'array `locations` nella chiamata `update`.
 Dovresti passare l'array `locations` nella chiamata `update`.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
index ffb09131e05..333ec320079 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
@@ -7,7 +7,7 @@ dashedName: step-62
 
 # --description--
 
-L'array `locations` contiene due location: `town square` e `store`. Attualmente stai passando l'intero array nella funzione `update`.
+The `locations` array contains two locations: the `"town square"` and the `"store"`. Attualmente stai passando l'intero array nella funzione `update`.
 
 Passa soltanto il primo elemento dell'array `locations` aggiungendo `[0]` alla fine della variabile. Ad esempio: `myFunction(arg[0]);`.
 
@@ -18,25 +18,25 @@ Questa notazione è detta <dfn>notazione a parentesi</dfn>. I valori in un array
 Dovresti usare la notazione a parentesi su `locations`.
 
 ```js
-assert.match(code, /locations\[/);
+assert.match(code, /locations\s*\[/);
 ```
 
 Dovresti accedere al primo oggetto nell'array `locations`. Ricorda che gli array sono a base zero.
 
 ```js
-assert.match(code, /locations\[0\]/);
+assert.match(code, /locations\s*\[\s*0\s*\]/);
 ```
 
 Dovresti passare il primo oggetto nell'array `locations` alla funzione `update`.
 
 ```js
-assert.match(code, /update\(locations\[0\]\);/);
+assert.match(code, /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 Questa chiamata dovrebbe essere ancora nella funzione `goTown()`.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\[0\]\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
index d6fb2bc9c40..520fe1030bc 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
@@ -9,20 +9,20 @@ dashedName: step-63
 
 Adesso la funzione `update` deve utilizzare gli argomenti che le vengono passati.
 
-All'interno della funzione `update`, cambia il valore dell'assegnazione di `button1.innerText` in `location["button text"]`. Questo codice fa uso della notazione a parentesi per ottenere la proprietà `button text` dell'oggetto `location` passato alla funzione.
+All'interno della funzione `update`, cambia il valore dell'assegnazione di `button1.innerText` in `location["button text"]`. That way, you use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 # --hints--
 
-La funzione `update` dovrebbe usare la notazione a parentesi per ottenere la proprietà `button text` dell'oggetto `location` passato alla funzione.
+Your `update` function should use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 ```js
 assert.match(update.toString(), /location[('|")button text\1]/);
 ```
 
-Dovresti assegnare il valore della proprietà `button text` dell'oggetto `location` alla proprietà `innerText` di `button1`.
+You should assign the value of the `"button text"` property of the `location` object to the `innerText` property of `button1`.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
index 4817622f653..cfc4c5f5250 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
@@ -7,20 +7,20 @@ dashedName: step-64
 
 # --description--
 
-`location["button text"]` è un array con tre elementi. Cambia l'assegnazione di `button1.innerText` in modo che corrisponda al primo elemento di questo array.
+`location["button text"]` è un array con tre elementi. Change the `button1.innerText` assignment to be `location["button text"][0]` which represents the first element of the array.
 
 # --hints--
 
-You should access the first element of the `button text` property of the `location` parameter.
+You should access the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.innerText` property to be the first element of the `button text` property of the `location` parameter.
+You should set the `button1.innerText` property to be the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
index 8f80745e1cd..2e2b09dd440 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
@@ -7,32 +7,32 @@ dashedName: step-65
 
 # --description--
 
-Adesso aggiorna `button2.innerText` e `button3.innerText` in modo che vengano loro assegnate rispettivamente il secondo e il terzo valore dell'array `button text`.
+Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `"button text"` array, respectively.
 
 # --hints--
 
-You should access the second element of the `button text` property of the `location` parameter.
+You should access the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.innerText` property to be the second element of the `button text` property of the `location` parameter.
+You should set the `button2.innerText` property to be the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.innerText\s*=\s*location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /button2\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button text` property of the `location` parameter.
+You should access the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.innerText` property to be the third element of the `button text` property of the `location` parameter.
+You should set the `button3.innerText` property to be the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.innerText\s*=\s*location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /button3\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
index 68a64f39025..ec28a7497c9 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
@@ -7,44 +7,44 @@ dashedName: step-66
 
 # --description--
 
-Seguendo lo stesso schema che hai usato per il testo dei pulsanti, aggiorna le assegnazioni di `onclick` dei tre pulsanti in modo che siano il primo, il secondo e il terzo valore dell'array `button functions`.
+Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `"button functions"` array.
 
 # --hints--
 
-You should access the first element of the `button functions` property of the `location` parameter.
+You should access the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.onclick` property to be the first element of the `button functions` property of the `location` parameter.
+You should set the `button1.onclick` property to be the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.onclick\s*=\s*location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /button1\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should access the second element of the `button functions` property of the `location` parameter.
+You should access the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.onclick` property to be the second element of the `button functions` property of the `location` parameter.
+You should set the `button2.onclick` property to be the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.onclick\s*=\s*location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /button2\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button functions` property of the `location` parameter.
+You should access the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.onclick` property to be the third element of the `button functions` property of the `location` parameter.
+You should set the `button3.onclick` property to be the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.onclick\s*=\s*location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /button3\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
index eb6c8809706..85950c5ed18 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
@@ -22,7 +22,7 @@ assert.match(goStore.toString(), /update\(/);
 La funzione `goStore` dovrebbe passare il secondo elemento dell'array `locations` come argomento di `update()`.
 
 ```js
-assert.match(goStore.toString(), /update\(locations\[1\]\)/);
+assert.match(goStore.toString(), /update\(\s*locations\s*\[\s*1\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
index 300f00edbf3..c9b8e77fa87 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
@@ -26,13 +26,13 @@ assert.isFunction(fightBeast);
 `fightSlime` dovrebbe essere vuota.
 
 ```js
-assert.match(fightSlime.toString(), /function fightSlime\(\) \{\}/);
+assert.match(fightSlime.toString(), /function fightSlime\(\s*\) \{\}/);
 ```
 
 `fightBeast` dovrebbe essere vuota.
 
 ```js
-assert.match(fightBeast.toString(), /function fightBeast\(\) \{\}/);
+assert.match(fightBeast.toString(), /function fightBeast\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
index d75976c039c..69547df515d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
@@ -9,14 +9,13 @@ dashedName: step-70
 
 Aggiungi un terzo oggetto all'array `locations`. Dagli le stesse proprietà degli altri due oggetti.
 
-Imposta `name` su `cave`. Imposta `button text` su un array con le stringhe `Fight slime`, `Fight fanged beast` e `Go to town square`. Imposta `button functions` su un array con le variabili `fightSlime`, `fightBeast`, `goTown`. Imposta la proprietà `text` su `You enter the cave. You see some monsters.`.
+Imposta `name` su `cave`. Set `button text` to an array with the strings `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`. Set the `"button functions"` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `"You enter the cave. You see some monsters."`.
 
 # --hints--
 
 Dovresti avere tre valori nell'array `locations`.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 3);
 ```
 
@@ -26,19 +25,19 @@ Il terzo valore di `locations` dovrebbe essere un oggetto.
 assert.isObject(locations[2]);
 ```
 
-Il terzo oggetto di `locations` dovrebbe avere una proprietà `name` con il valore `cave`.
+Your third `locations` object should have a `name` property with the value of `"cave"`.
 
 ```js
 assert.equal(locations[2].name, "cave");
 ```
 
-Il terzo oggetto di `locations` dovrebbe avere una proprietà `button text` con un array come valore.
+Your third `locations` object should have a `"button text"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button text"]);
 ```
 
-I valori della proprietà `button text` dovrebbero essere le stringhe `Fight slime`, `Fight fanged beast` e `Go to town square`.
+Your `"button text"` property should have the string values `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[2]["button text"][0], "Fight slime");
@@ -46,13 +45,13 @@ assert.equal(locations[2]["button text"][1], "Fight fanged beast");
 assert.equal(locations[2]["button text"][2], "Go to town square");
 ```
 
-Il terzo oggetto di `locations` dovrebbe avere una proprietà `button functions` con un array come valore.
+Your third `locations` object should have a `"button functions"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button functions"]);
 ```
 
-La proprietà `button functions` dovrebbe avere i valori di funzione `fightSlime`, `fightBeast` e `goTown`.
+Your `"button functions"` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
 
 ```js
 assert.equal(locations[2]["button functions"][0], fightSlime);
@@ -66,7 +65,7 @@ Il terzo oggetto di `locations` dovrebbe avere una proprietà `text` con una str
 assert.isString(locations[2].text);
 ```
 
-Il terzo oggetto di `locations` dovrebbe avere una proprietà `text` con il valore `You enter the cave. You see some monsters.`.
+Your third `locations` object should have a `text` property with the value of `"You enter the cave. You see some monsters."`.
 
 ```js
 assert.equal(locations[2].text, "You enter the cave. You see some monsters.");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
index a0f5591ba59..16db892db40 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
@@ -7,7 +7,7 @@ dashedName: step-71
 
 # --description--
 
-Ora che hai un oggetto per la location `cave`, aggiorna la funzione `goCave` in modo che chiami `update` e passale la nuova location `cave`. Ricorda che questo è il terzo elemento dell'array `locations`.
+Now that you have a `"cave"` location object, update your `goCave` function to call `update` and pass that new `"cave"` location. Ricorda che questo è il terzo elemento dell'array `locations`.
 
 Non dimenticare di rimuovere la chiamata `console.log`!
 
@@ -16,19 +16,19 @@ Non dimenticare di rimuovere la chiamata `console.log`!
 Dovresti usare la notazione a parentesi per accedere al terzo elemento dell'array `locations`.
 
 ```js
-assert.match(code, /locations\[2\]/);
+assert.match(code, /locations\s*\[\s*2\s*\]/);
 ```
 
 Dovresti passare il terzo elemento dell'array `locations` a `update`.
 
 ```js
-assert.match(code, /update\(locations\[2\]\)/);
+assert.match(code, /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 Dovresti chiamare `update` con il terzo elemento dell'array `locations` nella funzione `goCave`.
 
 ```js
-assert.match(goCave.toString(), /update\(locations\[2\]\)/);
+assert.match(goCave.toString(), /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 Non dovresti avere l'istruzione `console.log` nella funzione `goCave`.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
index 328705be652..55bd0f98265 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
@@ -7,7 +7,7 @@ dashedName: step-72
 
 # --description--
 
-Ora che le location `store` e `cave` sono complete, puoi mettere in codice le azioni che il giocatore può svolgere in queste location. All'interno della funzione `buyHealth`, imposta `gold` uguale a `gold` meno `10`.
+Now that your `"store"` and `"cave"` locations are complete, you can code the actions the player takes at those locations. All'interno della funzione `buyHealth`, imposta `gold` uguale a `gold` meno `10`.
 
 Ad esempio, ecco come puoi impostare `num` uguale a `num` meno `5`: `num = num - 5;`.
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
index 7b6e89f3017..8f04abb5087 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
@@ -19,7 +19,7 @@ const total = document.querySelector('#total');
 total.innerText = value;
 ```
 
-Puoi fare un test cliccando il pulsante "Go to store", seguito dal pulsante "Buy Health".
+You can test this by clicking your `"Go to store"` button, followed by your `"Buy Health"` button.
 
 **Nota:** la tua risposta dovrebbe essere di sole due righe di codice.
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
index 55001cd1145..93f72e7dcde 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
@@ -7,17 +7,20 @@ dashedName: step-76
 
 # --description--
 
-Cosa succede se il giocatore non ha abbastanza oro per comprare vita? Quando vuoi eseguire del codice in modo condizionale, puoi usare l'istruzione `if`. Metti tutto il codice nella funzione `buyHealth` all'interno di un'istruzione `if`. Ad esempio:
+Cosa succede se il giocatore non ha abbastanza oro per comprare vita? When you want to run code conditionally, you can use the <dfn>if</dfn> statement.
+
+An `if` statement is used to make decisions in code. The keyword `if` is followed by a condition in parentheses. If the condition is true, the code inside the curly braces `{}` is executed. If the condition is false, the code inside the curly braces is skipped.
+
+Here is an example of an `if` statement:
 
 ```js
-function myFunction() {
-  if ("condition") {
-    console.log("Hello World!");
-  }
+const num = 5;
+if (num >= 3) {
+  console.log("This code will run because num is greater than or equal to 3.");
 }
 ```
 
-For now, the `if` statement condition should be set to the string `condition` as a placeholder.
+Start by placing all of the code in your `buyHealth` function inside an `if` statement. For the `if` statement condition, check if `gold` is greater than or equal to `10`.
 
 # --hints--
 
@@ -27,16 +30,16 @@ L'elemento `buyHealth` dovrebbe avere un'istruzione `if`.
 assert.match(buyHealth.toString(), /if/);
 ```
 
-L'istruzione `if` dovrebbe avere la stringa `condition` come condizione.
+Your `if` statement should check if `gold` is greater than or equal to `10`.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)/);
 ```
 
 Tutto il codice di `buyHealth` dovrebbe essere in una istruzione `if`.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)\s*\{[\s\S]*\}/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)\s*{\s*gold\s*-=\s*10;\s*health\s*\+=\s*10;\s*goldText\.innerText\s*=\s*gold;\s*healthText\.innerText\s*=\s*health;\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
index d361cf0f0d7..483fff33021 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c5db7888af27af23f0dd
-title: Step 78
+title: Step 77
 challengeType: 0
-dashedName: step-78
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
index 643b4972555..7dd043dda50 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8c65b75664c28a8e59c16
-title: Step 79
+title: Step 78
 challengeType: 0
-dashedName: step-79
+dashedName: step-78
 ---
 
 # --description--
 
-All'interno dell'istruzione `else`, imposta `text.innerText` in modo che sia `You do not have enough gold to buy health.`.
+Inside the `else` statement, set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 # --hints--
 
-La funzione `buyHealth` dovrebbe impostare `text.innerText` su `You do not have enough gold to buy health.`.
+Your `buyHealth` function should set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 ```js
 assert.match(buyHealth.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy health\.\1/);
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
index 0956495038d..ea96275bb10 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c6815f5f1a29735efe1b
-title: Step 80
+title: Step 79
 challengeType: 0
-dashedName: step-80
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
index 0c40fb19e66..a74c09f7b32 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c7322e42962ad53ad204
-title: Step 81
+title: Step 80
 challengeType: 0
-dashedName: step-81
+dashedName: step-80
 ---
 
 # --description--
 
-Proprio come l'array `locations`, l'array `weapons` conterrà oggetti. Aggiungi quattro oggetti all'array `weapons`, ognuno con due proprietà: `name` e `power`. Il primo dovrebbe avere `name` impostato su `stick` e `power` impostato a `5`. Il secondo dovrebbe avere `dagger` e `30`. Il terzo, `claw hammer` e `50`. Il quarto, `sword` e `100`.
+Proprio come l'array `locations`, l'array `weapons` conterrà oggetti. Aggiungi quattro oggetti all'array `weapons`, ognuno con due proprietà: `name` e `power`. The first should have the `name` set to `"stick"` and the `power` set to `5`. The second should be `"dagger"` and `30`. The third, `"claw hammer"` and `50`. The fourth, `"sword"` and `100`.
 
 # --hints--
 
@@ -26,28 +26,28 @@ assert.isObject(weapons[2]);
 assert.isObject(weapons[3]);
 ```
 
-Il primo oggetto `weapons` dovrebbe avere `name` impostato su `stick` e `power` impostato a `5`.
+Your first `weapons` object should have the `name` set to `"stick"` and the `power` set to `5`.
 
 ```js
 assert.equal(weapons[0].name, 'stick');
 assert.equal(weapons[0].power, 5);
 ```
 
-Il secondo oggetto `weapons` dovrebbe avere `name` impostato su `dagger` e `power` impostato a `30`.
+Your second `weapons` object should have the `name` set to `"dagger"` and the `power` set to `30`.
 
 ```js
 assert.equal(weapons[1].name, 'dagger');
 assert.equal(weapons[1].power, 30);
 ```
 
-Il terzo oggetto `weapons` dovrebbe avere `name` impostato su `claw hammer` e `power` impostato a `50`.
+Your third `weapons` object should have the `name` set to `"claw hammer"` and the `power` set to `50`.
 
 ```js
 assert.equal(weapons[2].name, 'claw hammer');
 assert.equal(weapons[2].power, 50);
 ```
 
-Il quarto oggetto `weapons` dovrebbe avere `name` impostato su `sword` e `power` impostato a `100`.
+Your fourth `weapons` object should have the `name` set to `"sword"` and the `power` set to `100`.
 
 ```js
 assert.equal(weapons[3].name, 'sword');
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
index b7d5af98362..7777df2fc73 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c7a59e72c02bb1c717d2
-title: Step 82
+title: Step 81
 challengeType: 0
-dashedName: step-82
+dashedName: step-81
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.include(buyWeapon.toString(), 'if');
 L'istruzione `if` dovrebbe verificare se `gold` è maggiore o uguale a `30`.
 
 ```js
-assert.match(buyWeapon.toString(), /if\s*\(gold\s*>=\s*30\)/);
+assert.match(buyWeapon.toString(), /if\s*\(\s*gold\s*>=\s*30\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
index 656d9f30d9c..b7c60509b05 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c89e4272512d44fc1c66
-title: Step 83
+title: Step 82
 challengeType: 0
-dashedName: step-83
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
index f5e2bc60bc3..04a914850de 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c8cee8e5cf2e001789b4
-title: Step 84
+title: Step 83
 challengeType: 0
-dashedName: step-84
+dashedName: step-83
 ---
 
 # --description--
 
-Il valore della variabile `currentWeapon` corrisponde a un indice nell'array `weapons`. Il giocatore inizia con `stick`, dal momento che `currentWeapon` inizia a `0` e `weapons[0]` è l'arma `stick`.
+Il valore della variabile `currentWeapon` corrisponde a un indice nell'array `weapons`. The player starts with a `"stick"`, since `currentWeapon` starts at `0` and `weapons[0]` is the `"stick"` weapon.
 
 Nella funzione `buyWeapon`, usa l'assegnazione composta per aggiungere `1` a `currentWeapon` - l'utente sta comprando l'arma successiva nell'array `weapons`.
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
index 324d3190591..4ddd9d0313b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ca22d29fe62f3952bdf5
-title: Step 85
+title: Step 84
 challengeType: 0
-dashedName: step-85
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
index a50cc2cbae6..3e29871d075 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8cb19bd7f8a304e5427a1
-title: Step 86
+title: Step 85
 challengeType: 0
-dashedName: step-86
+dashedName: step-85
 ---
 
 # --description--
 
-Adesso aggiorna l'elemento `goldText` per mostrare il nuovo valore di `gold` e aggiorna l'elemento `text` in modo che mostri `You now have a new weapon.`.
+Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `"You now have a new weapon."`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ Dovresti aggiornare la proprietà `innerText` dell'elemento `goldText` in modo c
 assert.match(buyWeapon.toString(), /goldText\.innerText\s*=\s*gold/);
 ```
 
-Dovresti aggiornare la proprietà `innerText` dell'elemento `text` in modo che sia `You now have a new weapon.`.
+You should update the `innerText` property of the `text` element to be `"You now have a new weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a new weapon\.\1/);
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
index b134865f451..9f9ec67b338 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cbd1e3595431d5a2b3f1
-title: Step 87
+title: Step 86
 challengeType: 0
-dashedName: step-87
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
index f5f36ecc2b3..8568b222304 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cce1b0c32c33017cf2e9
-title: Step 88
+title: Step 87
 challengeType: 0
-dashedName: step-88
+dashedName: step-87
 ---
 
 # --description--
@@ -22,7 +22,7 @@ let value = array[index];
 Dovresti aggiornare `newWeapon` in modo che abbia il valore di `weapons[currentWeapon]`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
index 83bdf2eb866..d4ad718a4dc 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ce1dfc990134162b3bd9
-title: Step 89
+title: Step 88
 challengeType: 0
-dashedName: step-89
+dashedName: step-88
 ---
 
 # --description--
@@ -14,7 +14,7 @@ dashedName: step-89
 Dovresti aggiornare `newWeapon` in modo che abbia il valore di `weapons[currentWeapon].name`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]\.name;/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
index a24e67fd2ff..53374221b84 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8ce73d0dce43468f6689c
-title: Step 90
+title: Step 89
 challengeType: 0
-dashedName: step-90
+dashedName: step-89
 ---
 
 # --description--
 
-Puoi inserire variabili in una stringa con l'<dfn>operatore di concatenazione</dfn> `+`. Aggiorna la stringa `You now have a new weapon.` in modo che dica `You now have a` e il nome della nuova arma. Ricordati di terminare la frase con un punto.
+Puoi inserire variabili in una stringa con l'<dfn>operatore di concatenazione</dfn> `+`. Update the `"You now have a new weapon."` string to say `"You now have a "` and the name of the new weapon. Ricordati di terminare la frase con un punto.
 
-Ecco un esempio che crea la stringa `Hello, our name is freeCodeCamp.`:
+Here is an example that creates the string `"Hello, our name is freeCodeCamp."`:
 
 ```js
 const ourName = "freeCodeCamp";
@@ -18,7 +18,7 @@ const ourStr = "Hello, our name is " + ourName + ".";
 
 # --hints--
 
-Dovresti aggiornare l'assegnazione di `text.innerText` in modo che inizi con la stringa `You now have a`.
+You should update the `text.innerText` assignment to start with the string `"You now have a "`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a \1/);
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
index c89e56c7a5f..9bfea21dd20 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cf22272d6d35af80d4ac
-title: Step 91
+title: Step 90
 challengeType: 0
-dashedName: step-91
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
index 4bfc8efede0..bdd96adde36 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d0337d7c67377a4a76c6
-title: Step 92
+title: Step 91
 challengeType: 0
-dashedName: step-92
+dashedName: step-91
 ---
 
 # --description--
 
 Finora, ogni volta che `text.innerText` è stato aggiornato, il vecchio testo è stato cancellato. Stavolta, usa l'operatore `+=` per aggiungere il testo alla fine di `text.innerText`.
 
-Aggiungi la stringa `In your inventory you have:` - includi gli spazi all'inizio e alla fine.
+Add the string `" In your inventory you have: "` - include the spaces at the beginning and the end.
 
 # --hints--
 
@@ -26,7 +26,7 @@ Dovresti usare l'operatore `+=` per aggiungere a `text.innerText`.
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*/)
 ```
 
-Dovresti aggiungere la stringa `In your inventory you have:` alla fine di `text.innerText`. Attento agli spazi!
+You should add the string `" In your inventory you have: "` to the end of `text.innerText`. Attento agli spazi!
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
index 58d7f76a365..f59574ff7cd 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d08668fa8b38732486e9
-title: Step 93
+title: Step 92
 challengeType: 0
-dashedName: step-93
+dashedName: step-92
 ---
 
 # --description--
@@ -11,7 +11,7 @@ Alla fine della seconda stringa `text.innerText` che hai appena aggiunto, usa l'
 
 # --hints--
 
-Non dovresti cambiare la stringa `In your inventory you have:`.
+You should not change the `" In your inventory you have: "` string.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
index ff39f5b9469..e889f81c155 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d0c4f12c2239b6618582
-title: Passo 94
+title: Step 93
 challengeType: 0
-dashedName: step-94
+dashedName: step-93
 ---
 
 # --description--
 
-Aggiungi un'istruzione `else` alla funzione `buyWeapon`. In questa istruzione, imposta `text.innerText` uguale a `You do not have enough gold to buy a weapon.`.
+Aggiungi un'istruzione `else` alla funzione `buyWeapon`. In that statement, set `text.innerText` to equal `"You do not have enough gold to buy a weapon."`.
 
 # --hints--
 
@@ -24,13 +24,13 @@ const split = buyWeapon.toString().split(/\s|\n/);
 assert.isAbove(split.indexOf('else'), split.indexOf('if'));
 ```
 
-Dovresti impostare `text.innerText` su `You do not have enough gold to buy a weapon.`.
+You should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy a weapon.\1/);
 ```
 
-L'istruzione `else` dovrebbe impostare `text.innerText` su `You do not have enough gold to buy a weapon.`.
+Your `else` statement should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 gold = 20;
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
index a300ad20254..c4fb4a68c1a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d0fdf2dad83a92883a80
-title: Step 95
+title: Step 94
 challengeType: 0
-dashedName: step-95
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
index f4258454a13..54966852e2c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d143f2a58e3b6d6e9c33
-title: Step 96
+title: Step 95
 challengeType: 0
-dashedName: step-96
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
index b2ce079199d..4908579b2a8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d1c72e8bb13c2074d93c
-title: Step 97
+title: Step 96
 challengeType: 0
-dashedName: step-97
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
index 6e65ebb5bba..bd7bc2e9030 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d2146a3e853d0a6e28ca
-title: Step 98
+title: Step 97
 challengeType: 0
-dashedName: step-98
+dashedName: step-97
 ---
 
 # --description--
 
-Aggiungi un'istruzione `else` per l'istruzione `if` esterna. All'interno della nuova istruzione `else`, imposta `text.innerText` su `You already have the most powerful weapon!`.
+Aggiungi un'istruzione `else` per l'istruzione `if` esterna. Inside this new `else` statement, set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 # --hints--
 
@@ -18,13 +18,13 @@ const matches = buyWeapon.toString().match(/else/g);
 assert.equal(matches.length, 2);
 ```
 
-Dovresti impostare `text.innerText` su `You already have the most powerful weapon!`.
+You should set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 ```js
 assert.match(buyWeapon.toString(), /('|")You already have the most powerful weapon!\1/);
 ```
 
-Dovresti modificare `text.innerText` in `You already have the most powerful weapon!` nell'istruzione `else` esterna.
+You should modify your `text.innerText` to `"You already have the most powerful weapon!"` within your outer `else` statement.
 
 ```js
 currentWeapon = 5;
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
index dc37395d7d9..bb831b59b06 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d24c97461b3ddb9397c8
-title: Step 99
+title: Step 98
 challengeType: 0
-dashedName: step-99
+dashedName: step-98
 ---
 
 # --description--
 
 Una volta che un giocatore ha l'arma più potente, puoi dargli la possibilità di vendere le sue vecchie armi.
 
-Nell'istruzione `else` esterna, imposta `button2.innerText` su `Sell weapon for 15 gold`. Inoltre, imposta `button2.onclick` sul nome della funzione `sellWeapon`.
+In the outer `else` statement, set `button2.innerText` to `"Sell weapon for 15 gold"`. Inoltre, imposta `button2.onclick` sul nome della funzione `sellWeapon`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ Dovresti impostare il valore di `button2.innerText`.
 assert.match(buyWeapon.toString(), /button2\.innerText/);
 ```
 
-Dovresti impostare il valore di `button2.innerText` su `Sell weapon for 15 gold`.
+You should set the value of `button2.innerText` to `"Sell weapon for 15 gold"`.
 
 ```js
 assert.match(buyWeapon.toString(), /button2\.innerText\s*=\s*('|")Sell weapon for 15 gold\1;/);
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
index 3aa2c757738..fd2ab177c07 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d2e2a073be3edb46116f
-title: Step 100
+title: Step 99
 challengeType: 0
-dashedName: step-100
+dashedName: step-99
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.isFunction(sellWeapon);
 `sellWeapon` dovrebbe essere una funzione vuota.
 
 ```js
-assert.match(sellWeapon.toString(), /sellWeapon\(\)\s*\{\s*\}/);
+assert.match(sellWeapon.toString(), /sellWeapon\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
index 60895d53e90..4caf346f973 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d31ebbc10e3fe1b28e03
-title: Step 101
+title: Step 100
 challengeType: 0
-dashedName: step-101
+dashedName: step-100
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(sellWeapon.toString(), /if/);
 L'istruzione `if` dovrebbe verificare se `inventory.length` è maggiore di `1`.
 
 ```js
-assert.match(sellWeapon.toString(), /if\s*\(inventory\.length\s*>\s*1\)/);
+assert.match(sellWeapon.toString(), /if\s*\(\s*inventory\.length\s*>\s*1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
index 78aaa2701d1..025fb4903d8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d35660db4040ba292193
-title: Step 102
+title: Step 101
 challengeType: 0
-dashedName: step-102
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
index 0bc23b48eb3..c4003837fb9 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d382cd075f4169223e14
-title: Step 103
+title: Step 102
 challengeType: 0
-dashedName: step-103
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
index d6d09cfa907..47e3c780ee2 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d539dc11cb42b5dd7ec8
-title: Step 104
+title: Step 103
 challengeType: 0
-dashedName: step-104
+dashedName: step-103
 ---
 
 # --description--
@@ -21,19 +21,19 @@ Use the `shift()` method to take the first element from the `inventory` array an
 La funzione `sellWeapon` dovrebbe utilizzare il metodo `shift()`.
 
 ```js
-assert.match(sellWeapon.toString(), /shift\(\)/);
+assert.match(sellWeapon.toString(), /shift\(\s*\)/);
 ```
 
 Dovresti usare il metodo `shift()` sull'array `inventory`.
 
 ```js
-assert.match(sellWeapon.toString(), /inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /inventory\.shift\(\s*\)/);
 ```
 
 Dovresti assegnare il valore di `inventory.shift()` alla variabile `currentWeapon`.
 
 ```js
-assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
index 0b46b22ff1d..e95636cf487 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d61ddfe35744369365b7
-title: Step 105
+title: Step 104
 challengeType: 0
-dashedName: step-105
+dashedName: step-104
 ---
 
 # --description--
 
-Dopo `currentWeapon`, usa l'operatore di concatenazione per impostare `text.innerText` sulla stringa `You sold a`, poi `currentWeapon`, e poi la stringa `.`.
+After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `"You sold a "`, then `currentWeapon`, then the string `"."`.
 
 # --hints--
 
@@ -17,19 +17,19 @@ Dovresti usare l'operatore di assegnazione con `text.innerText`.
 assert.match(sellWeapon.toString(), /text\.innerText\s*=/);
 ```
 
-Dovresti aggiungere `You sold a` a `text.innerText`. La spaziatura è importante.
+You should add `"You sold a "` to `text.innerText`. La spaziatura è importante.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1/);
 ```
 
-Dovresti aggiungere il valore di `currentWeapon` alla stringa `You sold a`. Usa l'operatore di concatenazione per farlo sulla stessa riga.
+You should add the value of `currentWeapon` to the `"You sold a "` string. Usa l'operatore di concatenazione per farlo sulla stessa riga.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a\s\1\s*\+\s*\_currentWeapon/);
 ```
 
-Dovresti aggiungere la stringa `.` al valore di `currentWeapon`. Usa l'operatore di concatenazione per farlo sulla stessa riga.
+You should add the string `"."` to the value of `currentWeapon`. Usa l'operatore di concatenazione per farlo sulla stessa riga.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1\s*\+\s*\_currentWeapon\s+\+\s+('|")\.\2/);
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
index 6646b0944da..33b0b07fcee 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d6c7001ebc45350e3d16
-title: Step 106
+title: Step 105
 challengeType: 0
-dashedName: step-106
+dashedName: step-105
 ---
 
 # --description--
 
-Adesso usa l'operatore `+=` per aggiungere la stringa `In your inventory you have:` e il contenuto di `inventory` a `text.innerText`. Assicurati di includere uno spazio all'inizio e alla fine della stringa `In your inventory you have:`.
+Now use the `+=` operator to add the string `" In your inventory you have: "` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `" In your inventory you have: "` string.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const matches = sellWeapon.toString().match(/text\.innerText\s*\+=/g);
 assert.equal(matches.length, 1);
 ```
 
-Dovresti aggiungere la stringa `In your inventory you have:` alla seconda riga `text.innerText`. La spaziatura è importante.
+You should add the string `" In your inventory you have: "` to the second `text.innerText` line. La spaziatura è importante.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*\+=\s*('|") In your inventory you have: \1/);
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
index 951464af3f8..ae7841c271e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d7b8ab568b4649998954
-title: Step 107
+title: Step 106
 challengeType: 0
-dashedName: step-107
+dashedName: step-106
 ---
 
 # --description--
 
-Usa un'istruzione `else` da eseguire quando la lunghezza di `inventory` non è maggiore di uno. Imposta `text.innerText` su `Don't sell your only weapon!`.
+Usa un'istruzione `else` da eseguire quando la lunghezza di `inventory` non è maggiore di uno. Set the `text.innerText` to say `"Don't sell your only weapon!"`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ La funzione `sellWeapon` dovrebbe avere un'istruzione `else`.
 assert.match(sellWeapon.toString(), /else/);
 ```
 
-Dovresti impostare `text.innerText` su `Don't sell your only weapon!`.
+You should set `text.innerText` to `"Don't sell your only weapon!"`.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")Don't sell your only weapon!\1/);
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
index 20a2cea00fe..2c3617af0c1 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d81f539f004776dd9b1e
-title: Step 108
+title: Step 107
 challengeType: 0
-dashedName: step-108
+dashedName: step-107
 ---
 
 # --description--
 
 Ora puoi iniziare il codice per combattere i mostri. Per mantenere il codice organizzato, la funzione `fightDragon` è stata spostata per te vicino alle altre funzioni `fight`.
 
-Sotto l'array `weapons`, definisci una variabile `monsters` e assegnale un array. Imposta questo array in modo che abbia tre oggetti, ognuno con delle proprietà `name`, `level` e `health`. I valori del primo oggetto dovrebbero essere `slime`, `2` e `15`, in ordine. Il secondo dovrebbe essere `fanged beast`, `8` e `60`. Il terzo dovrebbe essere `dragon`, `20` e `300`.
+Sotto l'array `weapons`, definisci una variabile `monsters` e assegnale un array. Imposta questo array in modo che abbia tre oggetti, ognuno con delle proprietà `name`, `level` e `health`. The first object's values should be `"slime"`, `2`, and `15`, in order. The second should be `"fanged beast"`, `8`, and `60`. The third should be `"dragon"`, `20`, and `300`.
 
 # --hints--
 
@@ -37,7 +37,7 @@ L'array `monsters` dovrebbe avere 3 oggetti.
 assert(monsters.every(val => typeof val === "object"));
 ```
 
-Il primo valore nell'array `monsters` dovrebbe essere un oggetto con una proprietà `name` impostata su `slime`.
+The first value in your `monsters` array should be an object with a `name` property set to `"slime"`.
 
 ```js
 assert.equal(monsters[0].name, "slime");
@@ -55,7 +55,7 @@ Il primo valore nell'array `monsters` dovrebbe essere un oggetto con una proprie
 assert.equal(monsters[0].health, 15);
 ```
 
-Il secondo valore nell'array `monsters` dovrebbe avere un oggetto con una proprietà `name` impostata su `fanged beast`.
+The second value in your `monsters` array should be an object with a `name` property set to `"fanged beast"`.
 
 ```js
 assert.equal(monsters[1].name, "fanged beast");
@@ -73,7 +73,7 @@ Il secondo valore nell'array `monsters` dovrebbe essere un oggetto con una propr
 assert.equal(monsters[1].health, 60);
 ```
 
-Il terzo valore nell'array `monsters` dovrebbe essere un oggetto con una proprietà `name` impostata su `dragon`.
+The third value in your `monsters` array should be an object with a `name` property set to `"dragon"`.
 
 ```js
 assert.equal(monsters[2].name, "dragon");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
index 9961c06c1ac..686ff8acb67 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd468debb449b4454086
-title: Step 109
+title: Step 108
 challengeType: 0
-dashedName: step-109
+dashedName: step-108
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
index 027e512bca0..be4484c2f61 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd9cdb16324b04cfd958
-title: Step 110
+title: Step 109
 challengeType: 0
-dashedName: step-110
+dashedName: step-109
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.notMatch(fightSlime.toString(), /let|const/);
 Dovresti chiamare la funzione `goFight`.
 
 ```js
-assert.match(fightSlime.toString(), /goFight\(\);/);
+assert.match(fightSlime.toString(), /goFight\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
index cb1694a9860..84432fbe273 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8dfcf7fb1044d2f478fd1
-title: Step 111
+title: Step 110
 challengeType: 0
-dashedName: step-111
+dashedName: step-110
 ---
 
 # --description--
 
-Seguendo lo stesso schema, usa il codice nelle funzioni `fightBeast` e `fightDragon`. Ricorda che `beast` è all'indice `1` e `dragon` è all'indice `2`. Inoltre, rimuovi la chiamata `console.log` dalla funzione `fightDragon`.
+Following the same pattern as the `fightSlime` function, use that code in the `fightBeast` and `fightDragon` functions. Ricorda che `beast` è all'indice `1` e `dragon` è all'indice `2`. Inoltre, rimuovi la chiamata `console.log` dalla funzione `fightDragon`.
 
 # --hints--
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
index 087ecc84627..3ac6e3741d5 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e0d1d0110b4ec421489f
-title: Step 112
+title: Step 111
 challengeType: 0
-dashedName: step-112
+dashedName: step-111
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
index ea7bd608833..c83eeae8e72 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
@@ -1,20 +1,19 @@
 ---
 id: 62a8e142f7f0bd4fed898de3
-title: Step 113
+title: Step 112
 challengeType: 0
-dashedName: step-113
+dashedName: step-112
 ---
 
 # --description--
 
-Aggiungi un nuovo oggetto alla fine dell'array `locations`, seguendo le stesse proprietà come negli altri oggetti. Imposta `name` su `fight`, `button text` su un array con `Attack`, `Dodge` e `Run`, `button functions` su un array con `attack`, `dodge` e `goTown`, e `text` su `You are fighting a monster.`.
+Aggiungi un nuovo oggetto alla fine dell'array `locations`, seguendo le stesse proprietà come negli altri oggetti. Set `name` to `"fight"`, `"button text"` to an array with `"Attack"`, `"Dodge"`, and `"Run"`, `"button functions"` to an array with `attack`, `dodge`, and `goTown`, and `text` to `"You are fighting a monster."`.
 
 # --hints--
 
 L'array `locations` dovrebbe contenere 4 valori.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 4);
 ```
 
@@ -24,25 +23,25 @@ Il nuovo valore dovrebbe essere un oggetto.
 assert.isObject(locations[3]);
 ```
 
-Il nuovo oggetto dovrebbe avere una proprietà `name` impostata su `fight`.
+Your new object should have a `name` property set to `"fight"`.
 
 ```js
 assert.equal(locations[3].name, "fight");
 ```
 
-Il nuovo oggetto dovrebbe avere una proprietà `button text` impostata su un array con le stringhe `Attack`, `Dodge` e `Run`.
+Your new object should have a `"button text"` property set to an array with the strings `"Attack"`, `"Dodge"`, and `"Run"`.
 
 ```js
 assert.deepEqual(locations[3]["button text"], ["Attack", "Dodge", "Run"]);
 ```
 
-Il nuovo oggetto dovrebbe avere una proprietà `button functions` impostata su un array con le variabili `attack`, `dodge` e `goTown`.
+Your new object should have a `"button functions"` property set to an array with the variables `attack`, `dodge`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[3]["button functions"], [attack, dodge, goTown]);
 ```
 
-Il nuovo oggetto dovrebbe avere una proprietà `text` impostata su `You are fighting a monster.`.
+Your new object should have a `text` property set to `"You are fighting a monster."`.
 
 ```js
 assert.equal(locations[3].text, "You are fighting a monster.");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
index 4b627839272..d525faf81bb 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e1dc897df55108bcb5e8
-title: Step 114
+title: Step 113
 challengeType: 0
-dashedName: step-114
+dashedName: step-113
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(goFight.toString(), /update/);
 Dovresti passare il quarto oggetto dell'array `locations` alla chiamata di `update`.
 
 ```js
-assert.match(goFight.toString(), /update\(locations\[3\]\)/);
+assert.match(goFight.toString(), /update\(\s*locations\s*\[\s*3\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
index 51a11a98817..3fb91d7c52f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e21398ad61520edb724f
-title: Step 115
+title: Step 114
 challengeType: 0
-dashedName: step-115
+dashedName: step-114
 ---
 
 # --description--
@@ -14,13 +14,13 @@ Sotto la chiamata di `update`, imposta `monsterHealth` in modo che sia la vita d
 Dovresti usare la notazione a parentesi per accedere all'array `monsters` all'indice di `fighting`.
 
 ```js
-assert.match(goFight.toString(), /monsters\[fighting\]/);
+assert.match(goFight.toString(), /monsters\s*\[\s*fighting\s*\]/);
 ```
 
 Dovresti assegnare il valore di `monsters[fighting]` alla variabile `monsterHealth`.
 
 ```js
-assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\[fighting\](\.health|\[('|")health\2\])/);
+assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\s*\[\s*fighting\s*\]\s*(\.health|\[\s*('|")health\2\s*\])/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
index e02d513999f..d391e6a72c2 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
@@ -1,18 +1,25 @@
 ---
 id: 62a8e24c673b075317cc0b09
-title: Step 116
+title: Step 115
 challengeType: 0
-dashedName: step-116
+dashedName: step-115
 ---
 
 # --description--
 
-L'elemento HTML che mostra i dati del mostro è stato nascosto con il CSS. Mostra l'elemento `monsterStats` aggiornando la proprietà `display` della proprietà `style` in `block`. Ad esempio, puoi aggiornare la proprietà `first` della proprietà `name` di `user` in questo modo:
+By default, the HTML element that shows the monster's stats has been hidden with CSS. When the player clicks the "Fight dragon" button, the monster's stats should be displayed. You can accomplish this by using the <dfn>style</dfn> and <dfn>display</dfn> properties on the `monsterStats` element.
+
+The `style` property is used to access the inline style of an element and the `display` property is used to set the visibility of an element.
+
+Here is an example of how to update the display for a paragraph element:
 
 ```js
-user.name.first = "Naomi";
+const paragraph = document.querySelector('p');
+paragraph.style.display = 'block';
 ```
 
+Mostra l'elemento `monsterStats` aggiornando la proprietà `display` della proprietà `style` in `block`.
+
 # --hints--
 
 Dovresti usare la dot notation per accedere alla proprietà `style` di `monsterStats`.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
index 579a8956024..ced3b5f85ea 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e271f8e3d1541f9624ad
-title: Step 117
+title: Step 116
 challengeType: 0
-dashedName: step-117
+dashedName: step-116
 ---
 
 # --description--
 
-Ora imposta la proprietà `innerText` di `monsterName` in modo che sia la proprietà `name` del mostro attuale. Fai lo stesso per le proprietà `monsterHealthText` e `health`.
+Now, you will need to update the text for the current monster's name and health.
+
+Start by assigning `monsters[fighting].name` to the `innerText` property of `monsterName`. Then, assign `monsterHealth` to the `innerText` property of `monsterHealthText`.
 
 # --hints--
 
@@ -17,22 +19,22 @@ Dovresti usare la dot notation per accedere alla proprietà `innerText` di `mons
 assert.match(goFight.toString(), /monsterName\.innerText/);
 ```
 
-Dovresti impostare la proprietà `innerText` di `monsterName` in modo che sia il valore di `name` del mostro attuale. Ricorda che puoi ottenere il valore del mostro attuale con `monsters[fighting]`.
+You should assign `monsters[fighting].name` to `monsterName.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\[fighting\]\.name/);
+assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
-Dovresti usare la dot notation per accedere alla proprietà `innerText` di `monsterHealthText`.
+You should use dot notation to access the `innerText` property of `monsterHealthText`.
 
 ```js
 assert.match(goFight.toString(), /monsterHealthText\.innerText/);
 ```
 
-Dovresti impostare la proprietà `innerText` di `monsterHealthText` in modo che sia il valore di `health` del mostro attuale. You can get the current monster with `monsters[fighting]` or you can access this value using the `monsterHealth` variable that you previously assigned.
+You should assign `monsterHealth` to `monsterHealthText.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\[fighting\]\.health/);
+assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.health/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
index 545e41ec438..9ad88ce9ead 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e35675c18c56354c08cf
-title: Step 118
+title: Step 117
 challengeType: 0
-dashedName: step-118
+dashedName: step-117
 ---
 
 # --description--
 
-Ora puoi costruire la funzione `attack`. First, update the `text` message to say `The <monster name> attacks.`, replacing `<monster name>` with the name of the monster. Ricorda che puoi usare l'operatore di concatenazione.
+Ora puoi costruire la funzione `attack`. First, update the `text` message to say `"The <monster name> attacks."`, replacing `<monster name>` with the name of the monster. Ricorda che puoi usare l'operatore di concatenazione.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1/);
 Dovresti usare l'operatore di concatenazione per aggiungere il valore di `monsters[fighting].name` alla stringa `The`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 Dovresti usare l'operatore di concatenazione per aggiungere la stringa `attacks.` alla stringa `monsters[fighting].name`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name\s*\+\s*('|") attacks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name\s*\+\s*('|") attacks\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
index 4b491f89e3f..f1c9c5bf93e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e41e2f190c58404dd46e
-title: Step 119
+title: Step 118
 challengeType: 0
-dashedName: step-119
+dashedName: step-118
 ---
 
 # --description--
 
-On a new line, add the string `You attack it with your <weapon>.` to the `text` value, replacing `<weapon>` with the player's current weapon.
+On a new line, use the addition assignment operator(`+=`), to add the string `" You attack it with your <weapon>."` to the `text` value, replacing `<weapon>` with the player's current weapon. Additionally, remember that this line of text starts with a space so it will properly display.
 
 # --hints--
 
@@ -24,7 +24,7 @@ Dovresti usare l'assegnazione composta con `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=/);
 ```
 
-Dovresti aggiungere la stringa `You attack it with your` al valore di `text.innerText`. Ricorda che la spaziatura è importante.
+You should add the string `" You attack it with your "` to the `text.innerText` value. Ricorda che la spaziatura è importante.
 
 ```js
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1/);
@@ -33,13 +33,13 @@ assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it wit
 Dovresti usare l'operatore di concatenazione per aggiungere l'arma attuale alla stringa. Puoi ottenere l'arma attuale con `weapons[currentWeapon].name`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name/);
 ```
 
-Dovresti usare l'operatore di concatenazione per terminare la stringa con un `.`.
+You should use the concatenation operator to end your string with `"."`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name\s*\+\s*('|")\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*\+\s*('|")\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
index 6291df1445e..a70a4bcef3b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e45cc600c3591cee671a
-title: Step 120
+title: Step 119
 challengeType: 0
-dashedName: step-120
+dashedName: step-119
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(attack.toString(), /health\s*-=/);
 Dovresti sottrarre il livello del mostro attuale da `health`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*monsters\[fighting\]\.level/);
+assert.match(attack.toString(), /health\s*-=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
index 233c624289f..ac76865ed0a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
@@ -1,38 +1,40 @@
 ---
 id: 62a8e49f4df7af5ae2d7a616
-title: Step 121
+title: Step 120
 challengeType: 0
-dashedName: step-121
+dashedName: step-120
 ---
 
 # --description--
 
-Imposta `monsterHealth` su `monsterHealth` meno la potenza dell'arma attuale del giocatore. Ricorda che hai la variabile `currentWeapon` e la proprietà `power`.
+Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon.
+
+Remember that you can access the power of the player's current weapon using `weapons[currentWeapon].power`.
 
 # --hints--
 
-Dovresti usare l'assegnazione composta per modificare la variabile `monsterHealth`.
+You should use compound assignment to modify the `monsterHealth` variable.
 
 ```js
 assert.match(attack.toString(), /monsterHealth\s*-=/);
 ```
 
-Dovresti usare la notazione a parentesi con `currentWeapon` per accedere a `weapons`.
+You should use bracket notation with `currentWeapon` to access `weapons`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
-Dovresti usare la dot notation per accedere alla proprietà `power` di `weapons[currentWeapon]`.
+You should use dot notation to access the `power` property of `weapons[currentWeapon]`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
-Dovresti sottrarre il valore di `power` dell'arma attuale da `monsterHealth`.
+You should subtract the `power` of the current weapon from `monsterHealth`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
index 10f5671aee5..e2753e0a7bb 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8e4dc6a60f85bf256a0cb
-title: Step 122
+title: Step 121
 challengeType: 0
-dashedName: step-122
+dashedName: step-121
 ---
 
 # --description--
 
 The `Math` object in JavaScript contains static properties and methods for mathematical constants and functions. One of those is `Math.random()`, which generates a random number from `0` (inclusive) to `1` (exclusive). Un'altra è `Math.floor()`, che arrotonda per difetto un dato numero all'intero più vicino.
 
-Utilizzandoli, puoi generare un numero casuale all'interno di un intervallo. Ad esempio, questo genera un numero casuale tra 1 e 5: `Math.floor(Math.random() * 5) + 1;`.
+Utilizzandoli, puoi generare un numero casuale all'interno di un intervallo. For example, this generates a random number between `1` and `5`: `Math.floor(Math.random() * 5) + 1;`.
 
 Following this pattern, use the addition operator (`+`) to add a random number between `1` and the value of `xp` to your `monsterHealth -= weapons[currentWeapon].power`.
 
@@ -24,7 +24,7 @@ assert.lengthOf(attack.toString().match(/monsterHealth/g), 1);
 Dovresti aggiungerlo al valore `weapons[currentWeapon].power`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+/);
 ```
 
 Dovresti usare `Math.floor()`.
@@ -42,25 +42,25 @@ assert.match(attack.toString(), /Math\.random/);
 Dovresti moltiplicare `Math.random()` per il valore di `xp`.
 
 ```js
-assert.match(attack.toString(), /Math\.random\(\)\s*\*\s*xp/);
+assert.match(attack.toString(), /Math\.random\(\s*\)\s*\*\s*xp/);
 ```
 
 Dovresti usare `Math.floor()` per arrotondare per difetto il risultato di `Math.random() * xp`.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\)\s*\*\s*xp\s*.*\)/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*.*\)/);
 ```
 
 Dovresti aggiungere `1` al risultato di `Math.floor()`.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 Dovresti aggiungere il risultato di `Math.floor(Math.random() * xp) + 1` al risultato di `weapons[currentWeapon].power`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
index 538f36b7f3b..5d0e3e20869 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ed36d7a7915dfa444ba2
-title: Step 123
+title: Step 122
 challengeType: 0
-dashedName: step-123
+dashedName: step-122
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
index 759231f4c51..38b30f9650b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8edd05e27cc668051686f
-title: Step 124
+title: Step 123
 challengeType: 0
-dashedName: step-124
+dashedName: step-123
 ---
 
 # --description--
@@ -20,13 +20,13 @@ assert.match(attack.toString(), /if/);
 L'istruzione `if` dovrebbe verificare se `health` è minore o uguale a `0`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(health\s*<=\s*0\)/);
+assert.match(attack.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 ```
 
 L'istruzione `if` dovrebbe chiamare la funzione `lose`.
 
 ```js
-assert.match(attack.toString(), /lose\(\)/);
+assert.match(attack.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
index a652df1ec49..5713de43d04 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee154c8946678775c4a4
-title: Step 125
+title: Step 124
 challengeType: 0
-dashedName: step-125
+dashedName: step-124
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
index 4012e7d0c22..1e39f257a1d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee71f018e968a056d369
-title: Step 126
+title: Step 125
 challengeType: 0
-dashedName: step-126
+dashedName: step-125
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(code, /function\s+defeatMonster/);
 `defeatMonster` dovrebbe essere una funzione vuota.
 
 ```js
-assert.match(defeatMonster.toString(), /defeatMonster\s*\(\)\s*\{\s*\}/);
+assert.match(defeatMonster.toString(), /defeatMonster\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 Dovresti usare la parola chiave `function` per dichiarare `lose`.
@@ -32,7 +32,7 @@ assert.match(code, /function\s+lose/);
 `lose` dovrebbe essere una funzione vuota.
 
 ```js
-assert.match(lose.toString(), /lose\s*\(\)\s*\{\s*\}/);
+assert.match(lose.toString(), /lose\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
index f67e55aaad0..bd64f537d44 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8eec45f77bc69e8775294
-title: Step 127
+title: Step 126
 challengeType: 0
-dashedName: step-127
+dashedName: step-126
 ---
 
 # --description--
 
-Inside the `dodge` function, set `text.innerText` equal to the string `You dodge the attack from the <monster>`. Replace `<monster>` with the name of the monster, using the `name` property.
+Inside the `dodge` function, set `text.innerText` equal to the string `"You dodge the attack from the <monster>"`. Replace `<monster>` with the name of the monster, using the `name` property.
 
 # --hints--
 
-Dovresti assegnare la stringa `You dodge the attack from the` alla proprietà `text.innerText`. Ricorda che la spaziatura è importante.
+You should assign the string `"You dodge the attack from the "` to the `text.innerText` property. Ricorda che la spaziatura è importante.
 
 ```js
 assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1/);
@@ -20,7 +20,7 @@ assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack
 Dovresti usare l'operazione di concatenazione per aggiungere il nome del mostro alla fine della stringa. You can get this with `monsters[fighting].name`.
 
 ```js
-assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
index 6c566d5d21d..8038c827027 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8eefe2e68b66ac563816b
-title: Step 128
+title: Step 127
 challengeType: 0
-dashedName: step-128
+dashedName: step-127
 ---
 
 # --description--
 
-Nella funzione `defeatMonster`, imposta `gold` uguale a `gold` più il livello del mostro per `6.7`. Puoi ottenere il livello del mostro con la proprietà `level`.
+Nella funzione `defeatMonster`, imposta `gold` uguale a `gold` più il livello del mostro per `6.7`. Remember you can get the monster's level by using `monsters[fighting].level`.
 
 Ecco un esempio dell'impostazione di `num` su `num` più `5` * `8`: `num += 5 * 8`. Usa `Math.floor()` per arrotondare il risultato per difetto.
 
@@ -22,13 +22,13 @@ assert.match(defeatMonster.toString(), /gold\s*\+=/);
 Dovresti usare `Math.floor()` per arrotondare il risultato del livello del mostro moltiplicato per `6.7`.
 
 ```js
-assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\))/);
 ```
 
 You should add the result of `Math.floor(monsters[fighting].level * 6.7)` to `gold`.
 
 ```js
-assert.match(defeatMonster.toString(), /gold\s*\+=\s*(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /gold\s*\+=\s*((Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)))/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
index f311174ad20..122b9ca1735 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef6a52292f6bdca4f6f8
-title: Step 129
+title: Step 128
 challengeType: 0
-dashedName: step-129
+dashedName: step-128
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /xp\s*\+=/);
 Dovresti aggiungere il livello del mostro a `xp`.
 
 ```js
-assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\[fighting\]\.level/);
+assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
index c013cd300df..c31b61bf156 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef8f0c76a46cd221a68c
-title: Step 130
+title: Step 129
 challengeType: 0
-dashedName: step-130
+dashedName: step-129
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
index d405c6a1d39..bf39a5454ec 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8efb0e3ce826db8daf80f
-title: Step 131
+title: Step 130
 challengeType: 0
-dashedName: step-131
+dashedName: step-130
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /update/);
 Dovresti passare `locations[4]` come argomento.
 
 ```js
-assert.match(defeatMonster.toString(), /update\(locations\[4\]\)/);
+assert.match(defeatMonster.toString(), /update\(\s*locations\s*\[\s*4\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
index 720ab9dafa8..0fb7b3c9529 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8eff21c0b0f6ebe5b8e38
-title: Step 132
+title: Step 131
 challengeType: 0
-dashedName: step-132
+dashedName: step-131
 ---
 
 # --description--
 
 L'array `locations` non possiede un quinto elemento, quindi `locations[4]` non funziona.
 
-Aggiungi un nuovo oggetto alla fine dell'array `locations`, seguendo la stessa struttura degli altri oggetti. Imposta `name` su `kill monster`, imposta `button text` su un array con tre stringhe `Go to town square`, imposta `button functions` su un array con tre variabili `goTown`, e imposta `text` su `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Aggiungi un nuovo oggetto alla fine dell'array `locations`, seguendo la stessa struttura degli altri oggetti. Set `name` to `"kill monster"`, set `"button text"` to an array with three `"Go to town square"` strings, set `"button functions"` to an array with three `goTown` variables, and set `text` to `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 # --hints--
 
@@ -25,25 +25,25 @@ Il quinto valore di `locations` dovrebbe essere un oggetto.
 assert.isObject(locations[4]);
 ```
 
-Il quinto valore di `locations` dovrebbe avere una proprietà `name` con il valore `kill monster`.
+Your fifth `locations` value should have a `name` property with the value `"kill monster"`.
 
 ```js
 assert.equal(locations[4].name, 'kill monster');
 ```
 
-Il quinto valore di `locations` dovrebbe avere un array `button text` con tre stringhe `Go to town square`.
+Your fifth `locations` value should have a `"button text"` array with three `"Go to town square"` strings.
 
 ```js
 assert.deepEqual(locations[4]["button text"], ['Go to town square', 'Go to town square', 'Go to town square']);
 ```
 
-Il quinto valore di `locations` dovrebbe avere un array `button functions` con tre variabili `goTown`.
+Your fifth `locations` value should have a `"button functions"` array with three `goTown` variables.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, goTown]);
 ```
 
-Il quinto valore di `locations` dovrebbe avere una proprietà `text` con il valore `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Your fifth `locations` value should have a `text` property with the value `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams Arg! as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
index 83ae40af8e8..d9f7a04ea8d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8f06fb318666fef69f91e
-title: Step 133
+title: Step 132
 challengeType: 0
-dashedName: step-133
+dashedName: step-132
 ---
 
 # --description--
 
-La parola `Arg!` dovrebbe avere delle virgolette intorno. Oltre all'escaping delle virgolette, c'è un altro modo per includere le virgolette all'interno di una stringa.
+The word `"Arg!"` should have quotes around it. Oltre all'escaping delle virgolette, c'è un altro modo per includere le virgolette all'interno di una stringa.
 
-Cambia le virgolette doppie attorno alla stringa `The monster screams Arg! as it dies. You gain experience points and find gold.` in virgolette singole `'`, poi aggiungi le virgolette doppie attorno ad `Arg!`.
+Change the double quotes around the string `"The monster screams Arg! as it dies. You gain experience points and find gold."` to single quotes `'`, then add double quotes around `"Arg!"`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ Dovresti usare virgolette singole attorno alla stringa.
 assert.match(code, /'The monster screams "?Arg!"? as it dies. You gain experience points and find gold.'/);
 ```
 
-Dovresti usare le virgolette doppie intorno ad `Arg!`.
+You should use double quotes around `"Arg!"`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams "Arg!" as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
index 47963a39b53..45dc5c5dcc9 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f14fe6d1fc72454648c7
-title: Step 134
+title: Step 133
 challengeType: 0
-dashedName: step-134
+dashedName: step-133
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
index 9ae0b83a396..bedd3a41480 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f1d5f5ddbf74c07f733b
-title: Step 135
+title: Step 134
 challengeType: 0
-dashedName: step-135
+dashedName: step-134
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(lose.toString(), /update\(/);
 Your `update` function should have `locations[5]` for the argument.
 
 ```js
-assert.match(lose.toString(), /update\(locations\[5\]\)/);
+assert.match(lose.toString(), /update\(\s*locations\s*\[\s*5\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
index f627f380331..9a8b1e72e64 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f20463b324759953edad
-title: Step 136
+title: Step 135
 challengeType: 0
-dashedName: step-136
+dashedName: step-135
 ---
 
 # --description--
@@ -45,7 +45,7 @@ La funzione `restart` dovrebbe impostare `currentWeapon` a `0`.
 assert.match(restart.toString(), /currentWeapon\s*=\s*0/);
 ```
 
-La funzione `restart` dovrebbe impostare `inventory` su un array con la stringa `stick`.
+Your `restart` function should set `inventory` to an array with the string `"stick"`.
 
 ```js
 assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
@@ -54,7 +54,7 @@ assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
 La funzione `restart` dovrebbe chiamare la funzione `goTown()`.
 
 ```js
-assert.match(restart.toString(), /goTown\(\)/);
+assert.match(restart.toString(), /goTown\(\s*\)/);
 ```
 
 Dovresti impostare `goldText.innerText` con il valore di `gold`.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
index d1f49ddf287..96ff1bc5f1c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f256b813a476cae51f49
-title: Step 138
+title: Step 137
 challengeType: 0
-dashedName: step-138
+dashedName: step-137
 ---
 
 # --description--
@@ -41,7 +41,7 @@ Dovresti chiamare la funzione `winGame` nel blocco `if`.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\)(\s*\})?/);
+assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\s*\)(\s*\})?/);
 ```
 
 Dovresti aggiungere un blocco `else`.
@@ -55,7 +55,7 @@ Il blocco `else` dovrebbe chiamare la funzione `defeatMonster`.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\)(\s*\})?/);
+assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\s*\)(\s*\})?/);
 ```
 
 # --seed--
@@ -220,7 +220,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
index 318b2d4d97e..c664fa6e9da 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
@@ -20,7 +20,7 @@ assert.match(code, /function\s+winGame/);
 La funzione `winGame` dovrebbe chiamare la funzione `update` passandole `locations[6]`.
 
 ```js
-assert.match(winGame.toString(), /update\s*\(\s*locations\[6\]\s*\)/);
+assert.match(winGame.toString(), /update\s*\(\s*locations\s*\[\s*6\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -185,7 +185,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
index 8bad07f512b..a7946487d70 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
@@ -7,7 +7,7 @@ dashedName: step-140
 
 # --description--
 
-Aggiungi un altro oggetto all'array `locations`. Tutto dovrebbe essere come l'oggetto `lose`, eccetto che `name` dovrebbe essere `win` e `text` dovrebbe essere `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Aggiungi un altro oggetto all'array `locations`. Everything should be the same as the `lose` object, except the `name` should be `"win"` and the `text` should be `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 # --hints--
 
@@ -23,13 +23,13 @@ Il settimo valore di `locations` dovrebbe essere un oggetto.
 assert.isObject(locations[6]);
 ```
 
-Il settimo valore di `locations` dovrebbe avere una proprietà `name` con il valore `win`.
+Your seventh `locations` value should have a `name` property with the value `"win"`.
 
 ```js
 assert.equal(locations[6].name, 'win');
 ```
 
-Il settimo valore di `locations` dovrebbe avere un array `button text` con tre stringhe `REPLAY?`.
+Your seventh `locations` value should have a `button text` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[6]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
@@ -41,10 +41,10 @@ Il settimo valore di `locations` dovrebbe avere un array `button functions` con
 assert.deepEqual(locations[6]["button functions"], [restart, restart, restart]);
 ```
 
-Il settimo valore di `locations` dovrebbe avere una proprietà `text` con il valore `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Your seventh `locations` value should have a `text` property with the value `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 ```js
-assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! 🎉');
+assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! &#x1F389;');
 ```
 
 # --seed--
@@ -210,7 +210,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 --fcc-editable-region--
 ];
@@ -228,7 +228,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
index 1fd093bdbaf..0aac736981c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
@@ -16,7 +16,7 @@ All'interno della funzione `attack`, cambia la riga `health -= monsters[fighting
 Dovresti aggiornare la riga `health` in modo che sia `health -= getMonsterAttackValue(monsters[fighting].level);`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(monsters\[fighting\]\.level\)/);
+assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)/);
 ```
 
 # --seed--
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -204,7 +204,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
index ec0cfcfc87c..58882548fb8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
index c98a7e315cb..0692edd260f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
@@ -22,13 +22,13 @@ assert.match(code, /const\s+hit/);
 Dovresti usare l'equazione `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(Math\.random\(\)\s*\*\s*xp\))/);
+assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\))/);
 ```
 
 Dovresti impostare `hit` sul valore `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(code, /hit\s*=\s*\(level\s*\*\s*5\)\s*-\s*\(Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\)/);
+assert.match(code, /hit\s*=\s*\(\s*level\s*\*\s*5\s*\)\s*-\s*\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
index a524b4a14c5..88160223c69 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
index 0ede63dbb8e..2f97c1df517 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
@@ -188,13 +188,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -211,7 +211,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
index bab0e81d779..f54b77fc60e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
@@ -207,13 +207,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -230,7 +230,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
index d8a3c1f14da..e0ed90ca638 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
index 785668705c3..70a223539aa 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
@@ -14,7 +14,7 @@ Sposta l'assegnazione di `monsterHealth` nel blocco `if`.
 Dovresti spostare `monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1` nel blocco `if`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1/)
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
index 70493528dfd..14c73401f19 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
@@ -7,20 +7,20 @@ dashedName: step-149
 
 # --description--
 
-Add an `else` statement to the first `if` statement inside your `attack()` function. Nell'istruzione `else`, usa l'operatore `+=` per aggiungere il testo `You miss.` alla fine di `text.innerText`.
+Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `" You miss."` to the end of `text.innerText`.
 
 # --hints--
 
 Dovresti aggiungere un blocco `else` dopo il blocco `if (isMonsterHit())`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else/)
 ```
 
-Dovresti aggiungere il testo `You miss.` alla fine di `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
+You should add the text `" You miss."` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
index 9c9efb06726..bb64b9e900b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
@@ -20,7 +20,7 @@ assert.match(code, /function\s+isMonsterHit/);
 La funzione `isMonsterHit` dovrebbe restituire il risultato del confronto `Math.random() > .2`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2/);
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
index 3304191df77..d990eaeb0f8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
@@ -32,7 +32,7 @@ assert.match(isMonsterHit.toString(), /\|\|\s*health\s*<\s*20/);
 La funzione dovrebbe restituire il risultato del confronto `Math.random() > .2` **or** `health < 20`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
 ```
 
 # --seed--
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
index 89ddc46bd6e..1567692c8e8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
@@ -21,7 +21,7 @@ assert.lengthOf(ifs, 5);
 La nuova istruzione `if` dovrebbe verificare se `Math.random() <= .1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\)\s*<=\s*0?\.1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*<=\s*0?\.1\s*\)/);
 ```
 
 # --seed--
@@ -186,13 +186,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -209,7 +209,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
index eda36c08efb..9704d9b733e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
@@ -7,7 +7,7 @@ dashedName: step-153
 
 # --description--
 
-Use the `+=` operator to add `Your <weapon> breaks.`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
+Use the `+=` operator to add `" Your <weapon> breaks."`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
 
 # --hints--
 
@@ -21,7 +21,7 @@ assert.lengthOf(concat, 3);
 Dovresti usare il metodo `pop` sull'array `inventory`.
 
 ```js
-assert.match(attack.toString(), /inventory\.pop\(\)/);
+assert.match(attack.toString(), /inventory\.pop\(\s*\)/);
 ```
 
 Dovresti aggiungere `Your`, con una spazio prima e dopo, a `text.innerText`.
@@ -30,17 +30,16 @@ Dovresti aggiungere `Your`, con una spazio prima e dopo, a `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1/);
 ```
 
-Dovresti aggiungere il valore di ritorno di `inventory.pop()` alla stringa `Your`.
+You should add the return value of `inventory.pop()` to the `" Your "` string.
 
 ```js
-console.log(attack.toString());
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)/);
 ```
 
-Dovresti aggiungere `breaks.`, con uno spazio davanti, alla fine della stringa.
+You should add `" breaks."`, with a space in front of it, to the end of your string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)\s*\+\s*('|")\sbreaks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)\s*\+\s*('|")\sbreaks\.\2/);
 ```
 
 # --seed--
@@ -205,13 +204,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -228,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
index 7f584ff050a..822000a31fd 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
@@ -7,7 +7,13 @@ dashedName: step-154
 
 # --description--
 
-Ricorda che l'operatore di incremento `++` può essere usato per aumentare il valore di una variabile di 1. Esiste anche l'<dfn>operatore di decremento</dfn> `--` che può essere usato per diminuire il valore di una variabile di 1.
+Remember that the increment operator `++` can be used to increase a variable's value by `1`. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by `1`. For example :
+
+```js
+let num = 10;
+num--;
+console.log(num); // Output: 9
+```
 
 Decrementa il valore di `currentWeapon` nell'istruzione `if`, dopo l'aggiornamento del testo.
 
@@ -187,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -210,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
index 2e905641214..b315340dcf4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
@@ -24,19 +24,19 @@ if (firstName === "Quincy" && lastName === "Larson") {
 Non dovresti modificare l'istruzione `if` esistente.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1/);
 ```
 
 Dovresti usare l'operatore logico AND, `&&`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&/);
 ```
 
 Dovresti usare l'operatore logico AND per verificare se `inventory.length` non è uguale a `1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
 ```
 
 # --seed--
@@ -201,13 +201,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
index b9e5e204d55..19efbe759ab 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
@@ -28,7 +28,7 @@ assert.match(easterEgg.toString(), /update\(/);
 `easterEgg`dovrebbe chiamare la funzione `update` con `locations[7]` come argomento.
 
 ```js
-assert.match(easterEgg.toString(), /update\(\s*locations\[7\]\s*\)/);
+assert.match(easterEgg.toString(), /update\(\s*locations\s*\[\s*7\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
index 264bbf1188c..d0c8c266568 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
index 67a78fcc786..3c45394fbde 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
@@ -211,13 +211,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -234,7 +234,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
index fb600da2924..f06fcf39170 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
@@ -7,7 +7,7 @@ dashedName: step-159
 
 # --description--
 
-Aggiungi un altro oggetto all'array `locations`. Imposta `name` su `easter egg`, imposta `button text` su un array con le stringhe `2`, `8` e `Go to town square?`, imposta `button functions` su un array con le variabili `pickTwo`, `pickEight` e `goTown`, e `text` su `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Aggiungi un altro oggetto all'array `locations`. Set `name` to `"easter egg"`, set `"button text"` to an array with the strings `"2"`, `"8"`, and `"Go to town square?"`, set `"button functions"` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 # --hints--
 
@@ -23,25 +23,25 @@ L'ottavo valore di `locations` dovrebbe essere un oggetto.
 assert.isObject(locations[7]);
 ```
 
-L'ottavo valore di `locations` dovrebbe avere una proprietà `name` con il valore `easter egg`.
+Your eighth `locations` value should have a `name` property with the value `"easter egg"`.
 
 ```js
 assert.equal(locations[7].name, "easter egg");
 ```
 
-L'ottavo valore di `locations` dovrebbe avere un array `button text` con le stringhe `2`, `8` e `Go to town square?`.
+Your eighth `locations` value should have a `"button text"` array with the strings `"2"`, `"8"`, and `"Go to town square?"`.
 
 ```js
 assert.deepEqual(locations[7]["button text"], ["2", "8", "Go to town square?"]);
 ```
 
-L'ottavo valore di `locations` dovrebbe avere un array `button functions` con le variabili `pickTwo`, `pickEight` e `goTown`.
+Your eighth `locations` value should have a `"button functions"` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[7]["button functions"], [pickTwo, pickEight, goTown]);
 ```
 
-L'ottavo valore di `locations` dovrebbe avere una proprietà `text` con il valore `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Your eighth `locations` value should have a `text` property with the value `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 ```js
 assert.equal(locations[7].text, "You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!");
@@ -209,13 +209,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
 --fcc-editable-region--
 
@@ -235,7 +235,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
index 4eb559dc555..144e384890e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
@@ -14,7 +14,7 @@ Inside `pick`, use `const` to initialize a variable named `numbers` and set it t
 Your `pick` function should initialize `numbers` to an empty array `[]`.
 
 ```js
-assert.match(pick.toString(), /numbers\s*=\s*\[\]/);
+assert.match(pick.toString(), /numbers\s*=\s*\[\s*\]/);
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
index acb988feeb5..0917294ad32 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
@@ -195,13 +195,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
index 5dbf8931ecf..8bd39c0cec1 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
@@ -20,13 +20,13 @@ assert.match(pick.toString(), /numbers\.push\(/);
 Dovresti usare `Math.floor(Math.random() * 11)` per creare il numero casuale.
 
 ```js
-assert.match(pick.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)/);
+assert.match(pick.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)/);
 ```
 
 Dovresti usare `push` per aggiungere il risultato di `Math.floor(Math.random() * 11)` alla fine dell'array `numbers`.
 
 ```js
-assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)\s*\)/);
+assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
index d01a87a03dc..0fd7404233b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
@@ -7,23 +7,23 @@ dashedName: step-163
 
 # --description--
 
-After the `while` loop, set `text.innerText` to equal `You picked <someGuess>. Here are the random numbers:`. Replace `<someGuess>` with the `guess` function parameter.
+After the `while` loop, set `text.innerText` to equal `"You picked <someGuess>. Here are the random numbers:"`. Replace `<someGuess>` with the `guess` function parameter.
 
 # --hints--
 
-Dovresti impostare `text.innerText` sulla stringa `You picked`. Ricorda che la spaziatura è importante.
+You should set `text.innerText` to the string `"You picked "`. Ricorda che la spaziatura è importante.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1/);
 ```
 
-Dovresti usare l'operatore di concatenazione per aggiungere il valore del parametro `guess` alla stringa `You picked`.
+You should use the concatenation operator to add the value of the `guess` parameter to your `"You picked "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess/);
 ```
 
-Dovresti usare l'operatore di concatenazione per aggiungere `. Here are the random numbers:` alla stringa `"You picked " + guess`.
+You should use the concatenation operator to add the string `". Here are the random numbers:"` to your `"You picked " + guess` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\2/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
index dcc1fe6cf54..c3080062b61 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
@@ -11,7 +11,7 @@ At the end of the string, before the final quote, insert the new line escape cha
 
 # --hints--
 
-Dovresti aggiungere il carattere di escape nuova riga `\n` alla stringa `. Here are the random numbers:`.
+You should add the new line escape character `\n` to your `". Here are the random numbers: "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\\n\2/);
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
index ca1e1099956..5ffc188f704 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -214,7 +214,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
index c3176488778..885fa951be9 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
@@ -11,7 +11,7 @@ I loop `for` sono dichiarati con tre espressioni separate da punti e virgola. `f
 
 L'espressione di inizializzazione viene eseguita solo una volta, prima dell'inizio del loop e viene spesso usata per definire e impostare la variabile di loop. Immagina che sia come dichiarare un contatore da usare nel loop.
 
-Molti loop `for` usano `i` come contatore e partono da 0, quindi cambia `let x = 1;` in `let i = 0;`.
+Many `for` loops use `i` as the counter and start from `0`, so change `let x = 1;` to `let i = 0;`.
 
 # --hints--
 
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
index 63677a405a5..e672ebf8faf 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
@@ -9,7 +9,7 @@ dashedName: step-167
 
 La seconda istruzione in un loop `for`, l'istruzione della condizione, è valutata all'inizio di ogni iterazione del loop. Il loop continuerà finché la condizione viene valutata come vera.
 
-Vogliamo che il loop sia eseguito 10 volte, quindi cambia `x < 5` in `i < 10`.
+We want the loop to run `10` times, so change `x < 5` to `i < 10`.
 
 # --hints--
 
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
index aeb24f1ed61..eea66a7edbb 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
index 94b1ec98083..ac0ac2881db 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
@@ -20,20 +20,19 @@ assert.match(pick.toString(), /text\.innerText\s*\+=/);
 Dovresti usare la notazione a parentesi per accedere a `numbers[i]`.
 
 ```js
-assert.match(pick.toString(), /numbers\[i\]/);
+assert.match(pick.toString(), /numbers\s*\[\s*i\s*\]/);
 ```
 
 Dovresti aggiungere `numbers[i]` al valore di `text.innerText`.
 
 ```js
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]/);
 ```
 
 Dovresti aggiungere un carattere nuova riga dopo il valore `numbers[i]`. Ricorda che puoi farlo con `\n`.
 
 ```js
-console.log(pick.toString());
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]\s*\+\s*('|")\\n\1/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]\s*\+\s*('|")\\n\1/);
 ```
 
 # --seed--
@@ -198,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
index 24dba96e797..f37a6648f6e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
@@ -198,13 +198,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
index 30a149b57f4..b63d8391737 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
@@ -7,11 +7,11 @@ dashedName: step-171
 
 # --description--
 
-Inside the `if` statement, add the string `Right! You win 20 gold!` to the end of `text.innerText`. Inoltre, aggiungi `20` al valore di `gold` e aggiorna `goldText.innerText`.
+Inside the `if` statement, add the string `"Right! You win 20 gold!"` to the end of `text.innerText`. Inoltre, aggiungi `20` al valore di `gold` e aggiorna `goldText.innerText`.
 
 # --hints--
 
-Dovresti usare l'assegnazione composta per aggiungere la stringa `Right! You win 20 gold!` alla fine di `text.innerText`.
+You should use compound assignment to add the string `"Right! You win 20 gold!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Right! You win 20 gold!\1/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
index d610aefd8cb..3f5cbe9afc3 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
@@ -7,7 +7,7 @@ dashedName: step-172
 
 # --description--
 
-Now add an `else` statement. All'interno, aggiungi `Wrong! You lose 10 health!` alla fine di `text.innerText`. Sottrai `10` da `health` e aggiorna `healthText.innerText`.
+Now add an `else` statement. Inside, add `"Wrong! You lose 10 health!"` to the end of `text.innerText`. Sottrai `10` da `health` e aggiorna `healthText.innerText`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ Dovresti aggiungere un blocco `else`.
 assert.match(pick.toString(), /else\s*\{/);
 ```
 
-Il blocco `else` dovrebbe usare l'assegnazione composta per aggiungere `Wrong! You lose 10 health!` alla fine di `text.innerText`.
+Your `else` block should use compound assignment to add `"Wrong! You lose 10 health!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Wrong! You lose 10 health!\1/);
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -226,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
index 6322c801e8d..203226f9d6c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
@@ -27,7 +27,7 @@ assert.match(pick.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 L'istruzione `if` dovrebbe chiamare la funzione `lose`.
 
 ```js
-assert.match(pick.toString(), /lose\(\)/);
+assert.match(pick.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
@@ -192,13 +192,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -221,7 +221,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
index 6504830e599..de33a1a11e3 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
@@ -7,13 +7,13 @@ dashedName: step-174
 
 # --description--
 
-Se dai un'occhiata all'oggetto `kill monster`, `button functions` ha attualmente tre variabili `goTown`. Sostituisci la terza con `easterEgg` - è così che un giocatore potrà accedere alla funzionalità nascosta del gioco. Non cambiare `button text`.
+Looking at your `"kill monster"` object, `"button functions"` currently has three `goTown` variables. Sostituisci la terza con `easterEgg` - è così che un giocatore potrà accedere alla funzionalità nascosta del gioco. Do not change the `"button text"`.
 
 E con questo, il tuo gioco RPG è completo! Adesso puoi divertirti - sei in grado di sconfiggere il drago?
 
 # --hints--
 
-Dovresti aggiornare il quinto oggetto di `locations` in modo cha abbia una proprietà `button functions` del valore di `[goTown, goTown, easterEgg]`.
+You should update your fifth `locations` object to have a `"button functions"` property of `[goTown, goTown, easterEgg]`.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, easterEgg]);
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
@@ -557,13 +557,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
index 973a6fc4848..46e71562c93 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
@@ -1,13 +1,13 @@
 ---
 id: 62ba17beef16c563069a65d8
-title: Step 137
+title: Step 136
 challengeType: 0
-dashedName: step-137
+dashedName: step-136
 ---
 
 # --description--
 
-Nell'array `locations`, aggiungi un altro oggetto alla fine. Imposta la proprietà `name` su `lose`, imposta `button text` su un array con tre stringhe `REPLAY?`, imposta `button functions` su un array con tre variabili `restart` e imposta `text` su `You die. ☠️`. Puoi copiare questo testo per usare l'emote.
+Nell'array `locations`, aggiungi un altro oggetto alla fine. Set the `name` property to `"lose"`, set `"button text"` to an array with three `"REPLAY?"` strings, set `"button functions"` to an array with three `restart` variables, and set `text` to `"You die. &#x2620;"`.
 
 # --hints--
 
@@ -23,28 +23,28 @@ Il sesto valore di `locations` dovrebbe essere un oggetto.
 assert.isObject(locations[5]);
 ```
 
-Il sesto valore di `locations` dovrebbe avere una proprietà `name` con il valore `lose`.
+Your sixth `locations` value should have a `name` property with the value `"lose"`.
 
 ```js
 assert.equal(locations[5].name, 'lose');
 ```
 
-Il sesto valore di `locations` dovrebbe avere un array `button text` con tre stringhe `REPLAY?`.
+Your sixth `locations` value should have a `"button text"` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[5]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
 ```
 
-Il sesto valore di `locations` dovrebbe avere un array `button functions` con tre variabili `restart`.
+Your sixth `locations` value should have a `"button functions"` array with three `restart` variables.
 
 ```js
 assert.deepEqual(locations[5]["button functions"], [restart, restart, restart]);
 ```
 
-Il sesto valore di `locations` dovrebbe avere la proprietà `text` con il valore `You die. ☠️`.
+Your sixth `locations` value should have a `text` property with the value `"You die. &#x2620;"`.
 
 ```js
-assert.equal(locations[5].text, 'You die. ☠️');
+assert.equal(locations[5].text, 'You die. &#x2620;');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
index c8995a377aa..2ff1c2c10b4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
@@ -17,7 +17,7 @@ Dovresti dichiarare una variabile `button2` con `const`.
 assert.match(code, /const\s+button2/);
 ```
 
-La variabile `button2` dovrebbe avere il valore dell'elemento `#button2`.
+Your `button2` variable should have the value of your `"#button2"` element.
 
 ```js
 assert.deepEqual(button2, document.querySelector('#button2'));
@@ -29,7 +29,7 @@ Dovresti dichiarare una variabile `button3` con `const`.
 assert.match(code, /const\s+button3/);
 ```
 
-La variabile `button3` dovrebbe avere il valore dell'elemento `#button3`.
+Your `button3` variable should have the value of your `"#button3"` element.
 
 ```js
 assert.deepEqual(button3, document.querySelector('#button3'));
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
new file mode 100644
index 00000000000..432c7be3420
--- /dev/null
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
@@ -0,0 +1,356 @@
+---
+id: 65b2f6acce65b7a69751a090
+title: Step 138
+challengeType: 0
+dashedName: step-138
+---
+
+# --description--
+
+In order for the `&#x2620;` emoticon text to properly display on the page, you will need to use the <dfn>innerHTML</dfn> property.
+
+The `innerHTML` property allows you to access or modify the content inside an HTML element using JavaScript.
+
+Here is an example of updating the content for this paragraph element using the `innerHTML`  property.
+
+```html
+<p id="demo">This is a paragraph.</p>
+```
+
+```js
+document.querySelector("#demo").innerHTML = "Hello, innerHTML!";
+```
+
+In the `update` function, change `text.innerText` to `text.innerHTML`.
+
+# --hints--
+
+
+You should use dot notation to access the `innerHTML` property of `text`.
+
+```js
+assert.match(code, /text\.innerHTML/);
+```
+
+You should not use `let` or `const` to access the `innerHTML` property of `text`.
+
+```js
+assert.notMatch(code, /(let|const)\s+text.innerHTML/);
+```
+
+You should set `innerHTML` equal to the `text` property of `location`.
+
+```js
+assert.match(code, /text\.innerHTML\s*=\s*location\.text/);
+```
+
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <link rel="stylesheet" href="./styles.css">
+    <title>RPG - Dragon Repeller</title>
+  </head>
+  <body>
+    <div id="game">
+      <div id="stats">
+        <span class="stat">XP: <strong><span id="xpText">0</span></strong></span>
+        <span class="stat">Health: <strong><span id="healthText">100</span></strong></span>
+        <span class="stat">Gold: <strong><span id="goldText">50</span></strong></span>
+      </div>
+      <div id="controls">
+        <button id="button1">Go to store</button>
+        <button id="button2">Go to cave</button>
+        <button id="button3">Fight dragon</button>
+      </div>
+      <div id="monsterStats">
+        <span class="stat">Monster Name: <strong><span id="monsterName"></span></strong></span>
+        <span class="stat">Health: <strong><span id="monsterHealth"></span></strong></span>
+      </div>
+      <div id="text">
+        Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.
+      </div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+body {
+  background-color: #0a0a23;
+}
+
+#text {
+  background-color: #0a0a23;
+  color: #ffffff;
+  padding: 10px;
+}
+
+#game {
+  max-width: 500px;
+  max-height: 400px;
+  background-color: #ffffff;
+  color: #ffffff;
+  margin: 30px auto 0px;
+  padding: 10px;
+}
+
+#controls,
+#stats {
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #0a0a23;
+}
+
+#monsterStats {
+  display: none;
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #ffffff;
+  background-color: #c70d0d;
+}
+
+.stat {
+  padding-right: 10px;
+}
+
+button {
+  cursor: pointer;
+  color: #0a0a23;
+  background-color: #feac32;
+  background-image: linear-gradient(#fecc4c, #ffac33);
+  border: 3px solid #feac32;
+}
+```
+
+```js
+let xp = 0;
+let health = 100;
+let gold = 50;
+let currentWeapon = 0;
+let fighting;
+let monsterHealth;
+let inventory = ["stick"];
+
+const button1 = document.querySelector('#button1');
+const button2 = document.querySelector("#button2");
+const button3 = document.querySelector("#button3");
+const text = document.querySelector("#text");
+const xpText = document.querySelector("#xpText");
+const healthText = document.querySelector("#healthText");
+const goldText = document.querySelector("#goldText");
+const monsterStats = document.querySelector("#monsterStats");
+const monsterName = document.querySelector("#monsterName");
+const monsterHealthText = document.querySelector("#monsterHealth");
+const weapons = [
+  { name: 'stick', power: 5 },
+  { name: 'dagger', power: 30 },
+  { name: 'claw hammer', power: 50 },
+  { name: 'sword', power: 100 }
+];
+const monsters = [
+  {
+    name: "slime",
+    level: 2,
+    health: 15
+  },
+  {
+    name: "fanged beast",
+    level: 8,
+    health: 60
+  },
+  {
+    name: "dragon",
+    level: 20,
+    health: 300
+  }
+]
+const locations = [
+  {
+    name: "town square",
+    "button text": ["Go to store", "Go to cave", "Fight dragon"],
+    "button functions": [goStore, goCave, fightDragon],
+    text: "You are in the town square. You see a sign that says \"Store\"."
+  },
+  {
+    name: "store",
+    "button text": ["Buy 10 health (10 gold)", "Buy weapon (30 gold)", "Go to town square"],
+    "button functions": [buyHealth, buyWeapon, goTown],
+    text: "You enter the store."
+  },
+  {
+    name: "cave",
+    "button text": ["Fight slime", "Fight fanged beast", "Go to town square"],
+    "button functions": [fightSlime, fightBeast, goTown],
+    text: "You enter the cave. You see some monsters."
+  },
+  {
+    name: "fight",
+    "button text": ["Attack", "Dodge", "Run"],
+    "button functions": [attack, dodge, goTown],
+    text: "You are fighting a monster."
+  },
+  {
+    name: "kill monster",
+    "button text": ["Go to town square", "Go to town square", "Go to town square"],
+    "button functions": [goTown, goTown, goTown],
+    text: 'The monster screams "Arg!" as it dies. You gain experience points and find gold.'
+  },
+  {
+    name: "lose",
+    "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
+    "button functions": [restart, restart, restart],
+    text: "You die. &#x2620;"
+  }
+
+];
+
+// initialize buttons
+button1.onclick = goStore;
+button2.onclick = goCave;
+button3.onclick = fightDragon;
+
+function update(location) {
+  --fcc-editable-region--
+  monsterStats.style.display = "none";
+  button1.innerText = location["button text"][0];
+  button2.innerText = location["button text"][1];
+  button3.innerText = location["button text"][2];
+  button1.onclick = location["button functions"][0];
+  button2.onclick = location["button functions"][1];
+  button3.onclick = location["button functions"][2];
+  text.innerText = location.text;
+  --fcc-editable-region--
+}
+
+function goTown() {
+  update(locations[0]);
+}
+
+function goStore() {
+  update(locations[1]);
+}
+
+function goCave() {
+  update(locations[2]);
+}
+
+function buyHealth() {
+  if (gold >= 10) {
+    gold -= 10;
+    health += 10;
+    goldText.innerText = gold;
+    healthText.innerText = health;
+  } else {
+    text.innerText = "You do not have enough gold to buy health.";
+  }
+}
+
+function buyWeapon() {
+  if (currentWeapon < weapons.length - 1) {
+    if (gold >= 30) {
+      gold -= 30;
+      currentWeapon++;
+      goldText.innerText = gold;
+      let newWeapon = weapons[currentWeapon].name;
+      text.innerText = "You now have a " + newWeapon + ".";
+      inventory.push(newWeapon);
+      text.innerText += " In your inventory you have: " + inventory;
+    } else {
+      text.innerText = "You do not have enough gold to buy a weapon.";
+    }
+  } else {
+    text.innerText = "You already have the most powerful weapon!";
+    button2.innerText = "Sell weapon for 15 gold";
+    button2.onclick = sellWeapon;
+  }
+}
+
+function sellWeapon() {
+  if (inventory.length > 1) {
+    gold += 15;
+    goldText.innerText = gold;
+    let currentWeapon = inventory.shift();
+    text.innerText = "You sold a " + currentWeapon + ".";
+    text.innerText += " In your inventory you have: " + inventory;
+  } else {
+    text.innerText = "Don't sell your only weapon!";
+  }
+}
+
+function fightSlime() {
+  fighting = 0;
+  goFight();
+}
+
+function fightBeast() {
+  fighting = 1;
+  goFight();
+}
+
+function fightDragon() {
+  fighting = 2;
+  goFight();
+}
+
+function goFight() {
+  update(locations[3]);
+  monsterHealth = monsters[fighting].health;
+  monsterStats.style.display = "block";
+  monsterName.innerText = monsters[fighting].name;
+  monsterHealthText.innerText = monsterHealth;
+}
+
+function attack() {
+  text.innerText = "The " + monsters[fighting].name + " attacks.";
+  text.innerText += " You attack it with your " + weapons[currentWeapon].name + ".";
+  health -= monsters[fighting].level;
+  monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1;
+  healthText.innerText = health;
+  monsterHealthText.innerText = monsterHealth;
+   if (health <= 0) {
+    lose();
+  } else if (monsterHealth <= 0) {
+    if (fighting === 2) {
+      winGame();
+    } else {
+      defeatMonster();
+    }
+  }
+}
+
+function dodge() {
+  text.innerText = "You dodge the attack from the " + monsters[fighting].name;
+}
+
+function defeatMonster() {
+  gold += Math.floor(monsters[fighting].level * 6.7);
+  xp += monsters[fighting].level;
+  goldText.innerText = gold;
+  xpText.innerText = xp;
+  update(locations[4]);
+}
+
+function lose() {
+  update(locations[5]);
+}
+
+function restart() {
+  xp = 0;
+  health = 100;
+  gold = 50;
+  currentWeapon = 0;
+  inventory = ["stick"];
+  goldText.innerText = gold;
+  healthText.innerText = health;
+  xpText.innerText = xp;
+  goTown();
+}
+```
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
index a4bde443a36..c401157a74c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
@@ -22,21 +22,21 @@ Dovresti usare la notazione con parentesi per accedere alla proprietà di `total
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 Dovresti usare l'operatore di assegnazione per aggiornare il valore della proprietà di `totalCountPerProduct` che corrisponde a `dessert.id`.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=/);
 ```
 
 Dovresti aggiornare il valore di `totalCountPerProduct` in modo che sia il valore attuale più uno.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\+\s*1/);
 ```
 
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
index f66b11a9bf2..0997adb46f7 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
@@ -17,28 +17,28 @@ You should wrap your right-hand `totalCountPerProduct[dessert.id]` in parenthese
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 Dovresti usare l'operatore `||`.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*/);
 ```
 
 Dovresti usare `0` come valore di ripiego.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
 ```
 
 Dovresti comunque aggiungere `1` al valore.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
index fc06c5f2945..74c38070ceb 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
@@ -29,7 +29,7 @@ Dovresti assegnare il valore di `totalCountPerProduct[product.id]` a `currentPro
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\[product\.id\]/);
+assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\s*\[\s*product\.id\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
index 28f8cafde70..cdd212d45ec 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
@@ -32,7 +32,7 @@ assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*
 Dovresti aggiungere una funzione callback vuota all'event listener. Ricordati di darle un parametro `event`.
 
 ```js
-assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*\s*\}\s*\)/);
+assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*;?\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
index f7516dc7310..9ea477ad95b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
@@ -53,7 +53,7 @@ La callback di `reduce` dovrebbe avere un valore iniziale di `0`.
 
 ```js
 const afterCalculateTotal = code.split('calculateTotal')[1];
-assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(total,\s*item\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
+assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(\s*total,\s*item\s*\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
index f8230b2ec51..cb2094e0d85 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
@@ -37,7 +37,6 @@ assert.match(afterCalculateTaxes, /amount\s*\*\s*\(\s*this\s*\.\s*taxRate\s*\/\s
 Il metodo `calculateTaxes` dovrebbe restituire il valore di `taxRate` (diviso per 100, per convertirlo in percentuale) moltiplicato per il parametro `amount`.
 
 ```js
-console.log(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 assert.equal(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 ```
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
index 23c1c25f8dc..2e2b93062f0 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
@@ -19,37 +19,37 @@ Start by accessing the `#playlist-songs`, `#play`, and `#pause` elements with th
 You should use `document.getElementById()` to get the `#playlist-songs` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should assign the `#playlist-songs` element to the variable `playlistSongs`. Non dimenticare di utilizzare `const` per dichiarare la variabile.
 
 ```js
-assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#play` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should assign the `#play` element to the variable `playButton`. Non dimenticare di utilizzare `const` per dichiarare la variabile.
 
 ```js
-assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#pause` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 You should assign the `#pause` element to the variable `pauseButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
index ac8b6b10112..2d4e4c81e9e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
@@ -16,37 +16,37 @@ Assign them to variables named `nextButton`, `previousButton`, and `shuffleButto
 You should use `document.getElementById()` to get the `#next` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should assign the `#next` element to the variable `nextButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#previous` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should assign the `#previous` element to the variable `previousButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#shuffle` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 You should assign the `#shuffle` element to the variable `shuffleButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
index 9985f74517e..c988a58a8e0 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
@@ -18,13 +18,13 @@ Use `const` to create a variable named `audio` and set it equal to `new Audio()`
 You should use the `new` keyword to create an instance of the `Audio` object.
 
 ```js
-assert.match(code, /new\s+Audio\(\);?/)
+assert.match(code, /new\s+Audio\(\s*\);?/)
 ```
 
 You should assign the `Audio` object to a constant named `audio`.
 
 ```js
-assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\);?/)
+assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
index 1cb88c1e094..cdc366ecee4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
@@ -34,7 +34,7 @@ assert.match(code, /userData\?\.songs\.find\(/)
 Your `find` method should have `song` as the parameter of its arrow function callback.
 
 ```js
-assert.match(code, /userData\?\.songs\.find\(\(?song\)?/)
+assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 Your `find` method should use strict equality to check if `song.id` is equal to `id`.
@@ -46,7 +46,7 @@ assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(so
 Your `find` method should be assigned to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\);?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
index fbda796d85a..2f9e1cca28f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
@@ -13,22 +13,22 @@ Also, set the `audio.title` property equal to `song.title`. This tells the audio
 
 # --hints--
 
-You should not modify the exist `playSong` function and its content.
+You should not modify the existing `playSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?/)
 ```
 
 You should set `audio.src` to `song.src`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?/)
 ```
 
 You should set `audio.title` to `song.title`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
index ee06f90d4ac..d99cde2a89f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
@@ -17,13 +17,13 @@ Add an `if` statement to check whether the `userData?.currentSong` is `null` or
 You should create an `if` statement with the condition `userData?.currentSong === null || userData?.currentSong.id !== song.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*/)
 ```
 
 You should set `audio.currentTime` to `0` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
index 7aedbf78906..4d6c8bd7ebf 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
@@ -11,9 +11,11 @@ You need to update the current song being played as well as the appearance of th
 
 Start by accessing the `userData` object and its `currentSong` property. Set its value equal to the `song` variable.
 
+*Note*: You should not use the optional chaining operator `?.` in this step because `userData.currentSong` will not be `null` or `undefined` at this point.
+
 # --hints--
 
-You should set `userData.currentSong` to `song`.
+You should assign `song` to `userData.currentSong`.
 
 ```js
 assert.match(code, /userData\.currentSong\s*=\s*song;?/)
@@ -614,7 +616,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   --fcc-editable-region--
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
index bd988c5fefb..282f93f8d2a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
@@ -7,9 +7,9 @@ dashedName: step-33
 
 # --description--
 
-You need to hook up the `playSong` function to a `click` event listener so the songs will start playing when the play button is clicked.
+In previous steps you built out the functionality for playing a song. Now you need to add the functionality to the play button so that it will play the current song when it is clicked on.
 
-Add a click event listener to the `playButton` element, then use arrow syntax to pass in a callback with an empty pair of curly braces.
+Use the `addEventListener()` method and pass in a `click` event for the first argument and an empty callback function with arrow syntax for the second argument, e.g., `() => {}`.
 
 # --hints--
 
@@ -22,13 +22,13 @@ assert.match(code, /playButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback into your event listener. Don't forget you also need an empty pair of curly braces.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
index 08a3b4f094a..50b6fd9feb8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+songsHTML/);
 You should assign `array.map()` to your `songsHTML`.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\)/);
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
index 4c8936ce1e6..52708b5efe6 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
@@ -32,7 +32,7 @@ assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\
 You should interpolate `song.title` as the content of your `span` element.
 
 ```js
-assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\$\{song\.title\}\s*<\/span>\s*<\/button>/)
+assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\s*\$\{\s*song\.title\s*\}\s*<\/span>\s*<\/button>/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
index c81b41eb76a..50e33b3798f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
@@ -24,7 +24,7 @@ assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*/)
 Your button element should have an `aria-label` attribute with the value `Delete ${song.title}` as its second attribute and value.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2\s*>/)
 ```
 
 You should paste in the provided `svg` as the content of your `button` element.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
index 1b02c312a26..10d83b4d47d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
@@ -24,7 +24,7 @@ Chain the `join()` method to your `map()` method and pass in an empty string for
 You should add `join("")` to the existing code.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\)\s*\.join\(('|")\3\);?/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\s*\)\s*\.join\(\s*('|")\3\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
index 1ec579c7363..1ff8535ce02 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
@@ -35,7 +35,7 @@ Call the `renderSongs` function with the `songs` property of `userData`. This wi
 You should call your `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /renderSongs\(userData\?\.songs\)/)
+assert.match(code, /renderSongs\(\s*userData\?\.songs\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
index aa305a2eccb..ff96ed160c2 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
@@ -9,20 +9,20 @@ dashedName: step-34
 
 Within the arrow function of the event listener, add an `if` to check if `userData?.currentSong` is `null`.
 
-Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData.songs` array. This will ensure the first song in the playlist is played first.
+Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData?.songs` array. This will ensure the first song in the playlist is played first.
 
 # --hints--
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
index 092a00e9416..71c13a9a51c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
@@ -16,20 +16,20 @@ This ensures that the currently playing song will continue to play when the play
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` block to your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.currentSong.id` in the `else` block of your `if` statement.
 
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*playSong\(userData\?\.currentSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*playSong\(\s*userData\?\.currentSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -627,7 +627,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
index c3d38a06e24..aa57c3f7fb0 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
@@ -28,13 +28,13 @@ assert.isFunction(pauseSong)
 Your `pauseSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `pauseSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
index ca18b596a51..a74bd1852f7 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
@@ -9,15 +9,17 @@ dashedName: step-38
 
 To store the current time of the song when it is paused, set the `songCurrentTime` of the `userData` object to the `currentTime` of the `audio` variable.
 
+*Note*: You should not use optional chaining for this step because `userData.songCurrentTime` will not be `null` or `undefined` at this point.
+
 # --hints--
 
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
-You should set `userData.songCurrentTime` to `audio.currentTime`.
+You should assign `audio.currentTime` to `userData.songCurrentTime`.
 
 ```js
 assert.match(code, /userData\.songCurrentTime\s*=\s*audio\.currentTime;?/)
@@ -618,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
index 56fa6621428..1c68a42b065 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
@@ -16,19 +16,19 @@ To finally pause the song, use the `pause()` method on the `audio` variable. `pa
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `classList` property and the `remove()` method to remove the class `playing` from the `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.remove\(('|")playing\1\);?/)
+assert.match(code, /playButton\.classList\.remove\(\s*('|")playing\1\s*\);?/)
 ```
 
 You should use the `pause()` method on your `audio` variable.
 
 ```js
-assert.match(code, /audio\.pause\(\)/)
+assert.match(code, /audio\.pause\(\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
index 3bf017ce6ee..520b11e59e3 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
@@ -22,13 +22,13 @@ assert.match(code, /pauseButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `pauseSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1,\s*pauseSong\)/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1,\s*pauseSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
index 91d2d1e94fb..58b3c6c3987 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
@@ -16,13 +16,13 @@ To finally play the song, use the `play()` method on the `audio` variable. `play
 You should use the `classList` property and the `add` method to add the class `playing` to `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.add\(("|')playing\1\);?/)
+assert.match(code, /playButton\.classList\.add\(\s*("|')playing\1\s*\);?/)
 ```
 
 You should use the `play()` method on the `audio` variable.
 
 ```js
-assert.match(code, /audio\.play\(\);?/)
+assert.match(code, /audio\.play\(\s*\);?/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
 
   userData.currentSong = song;
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
index 72a9981ebb9..8ea1becc84f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
@@ -28,13 +28,13 @@ assert.isFunction(playNextSong)
 Your `playNextSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playNextSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
index a5f18d617df..2a4d2cc76d6 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
@@ -9,30 +9,30 @@ dashedName: step-44
 
 Inside the `playNextSong` function, create an `if` statement to check if the `currentSong` of `userData` is strictly equal to `null`. This will check if there's no current song playing in the `userData` object.
 
-If the condition is true, call the `playSong` function with the `id` of the first song in the `userData.songs` array as an argument.
+If the condition is true, call the `playSong` function with the `id` of the first song in the `userData?.songs` array as an argument.
 
 # --hints--
 
 You should not modify the existing `playNextSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside the `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
index a06570f43eb..ef2929a433d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
@@ -14,25 +14,25 @@ Add an `else` block to the `if` statement. Inside the `else` block, call the `ge
 You should not modify the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` to the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 You should set the `currentSongIndex` constant to `getCurrentSongIndex()` inside the `else` block.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*\}/)
 ```
 
 
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -678,7 +678,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
index 75931f6fc84..52dc2d7f74d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
@@ -18,25 +18,25 @@ Lastly, call the `playSong` function and pass in `nextSong.id` as the argument.
 You should not modify the existing `if` statement, its `else` block, and content.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex + 1]` to a `nextSong` constant.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `nextSong.id`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*playSong\(nextSong\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*playSong\(\s*nextSong\.id\s*\);?\s*\}/)
 ```
 
 
@@ -635,7 +635,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
index d7f04288b13..b4c01979d31 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
@@ -22,13 +22,13 @@ assert.match(code, /nextButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playNextSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1,\s*playNextSong\)/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1,\s*playNextSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -675,7 +675,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
index c8ef44db782..8103c239ca7 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
@@ -26,13 +26,13 @@ assert.isFunction(playPreviousSong)
 Your `playPreviousSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playPreviousSong` function should be empty.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
index 8069fc689c1..8e5fb945e95 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
@@ -16,31 +16,31 @@ Inside the `else` block, create a constant named `currentSongIndex` and assign i
 You should not alter the existing `playPreviousSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should have an `if` statement with the condition `userData?.currentSong === null` inside your `playPreviousSong` function.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*/)
 ```
 
 You should have `return` inside the block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
 ```
 
 You should call `getCurrentSongIndex` and assign it to `currentSongIndex` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -695,7 +695,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
index 2d5c1e9f727..508c4af59c6 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
@@ -14,19 +14,19 @@ To get the previous song, subtract `1` from the `currentSongIndex` of `userData?
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex - 1]` to a `previousSong` constant.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `previousSong.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*playSong\(previousSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*playSong\(\s*previousSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
index 7c14d9eabee..856bd518df4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
@@ -20,13 +20,13 @@ assert.match(code, /previousButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playPreviousSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1,\s*playPreviousSong\)/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1,\s*playPreviousSong\s*\)/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
index 7eb05fe80fe..8c40d56015c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
@@ -28,19 +28,19 @@ assert.isFunction(highlightCurrentSong)
 Your `highlightCurrentSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*/)
 ```
 
 You should create a `playlistSongElements` constant inside your `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
 ```
 
 You should use the `querySelectorAll()` method to select the `.playlist-song` element and assign it to the `playlistSongElements` constant.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*\};?/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
index f68e3d5fdd5..b530d08bef4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
@@ -22,7 +22,7 @@ assert.isFunction(getCurrentSongIndex);
 Your `getCurrentSongIndex` function should use arrow syntax.
 
 ```js
-assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\)\s*=>\s*{\s*}\s*/);
+assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*/);
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
index 43ca4ee5f56..44798430f96 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
@@ -16,7 +16,7 @@ Use `getElementById()` to get the `id` of the currently playing song, then use t
 You should not modify the existing `highlightCurrentSong` function and its content.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*/)
 ```
 
 You should use `document.getElementById()` and pass in `` `song-${userData?.currentSong?.id}` ``.
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -692,7 +692,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
index 3db4bbff2c8..93cf75a7cc6 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
@@ -33,13 +33,13 @@ assert.match(code, /playlistSongElements\.forEach\(/)
 Your `forEach()` method should have a `songEl` parameter and use arrow syntax.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*/)
 ```
 
 Your `forEach` should have an empty pair of curly braces.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -637,7 +637,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
index 41068cb7e43..c098a978ed6 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
@@ -16,19 +16,19 @@ Create an `if` statement with the condition `songToHighlight`. For the statement
 You should create an `if` statement with the condition `songToHighlight`.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*/)
 ```
 
 You should use the `setAttribute()` method on `songToHighlight` inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(/)
 ```
 
 You should pass in `"aria-current"` and `"true"` as the first and second argument of your `setAttribute` method.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\)\s*;?\s*\}?/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\s*\)\s*;?\s*\}?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
index c10a26b7fc9..3d73822b244 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
@@ -16,7 +16,7 @@ After that, play around with the control buttons to see how the `highlightCurren
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /highlightCurrentSong\(\)/)
+assert.match(code, /highlightCurrentSong\(\s*\)/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -688,7 +688,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
index ec8cb00d61a..f9531b43d55 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
@@ -26,13 +26,13 @@ assert.isFunction(setPlayerDisplay)
 Your `setPlayerDisplay` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayerDisplay` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
index 7770734be4e..f2311942d16 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
@@ -16,31 +16,31 @@ Access the `#player-song-title` and `#player-song-artist` elements with the `get
 You should not modify the existing `setPlayerDisplay` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use `document.getElementById()` to get the `#player-song-title` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should assign the `#player-song-title` element to the variable `playingSong`. Non dimenticare di utilizzare `const` per dichiarare la variabile.
 
 ```js
-assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should use `document.getElementById()` to get the `#player-song-artist` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 You should assign the `#player-song-artist` element to the variable `songArtist`. Non dimenticare di utilizzare `const` per dichiarare la variabile.
 
 ```js
-assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -716,7 +716,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
index c4b893e84b9..b479bfe1ea3 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -710,7 +710,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
index 8806ff53e58..f0f8aa56437 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -725,7 +725,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
index e044c12cdc0..9ff636575ad 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
@@ -16,7 +16,7 @@ Now you should see the song title and the artist show up in the display.
 You should call the `setPlayerDisplay` function inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayerDisplay\(\);?/)
+assert.match(code, /setPlayerDisplay\(\s*\);?/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
index 9182f27ff3a..d31a44cda47 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
@@ -28,13 +28,13 @@ assert.isFunction(setPlayButtonAccessibleText)
 Your `setPlayButtonAccessibleText` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayButtonAccessibleText` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -719,7 +719,7 @@ const renderSongs = (array) => {
 
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
index 58ff3da0658..c4d58db6824 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
@@ -16,19 +16,19 @@ Don't forget to use optional chaining.
 You should not modify the existing `setPlayButtonAccessibleText` and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should access `userData?.currentSong` or `userData?.songs[0]`.
 
 ```js
-assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 You should assign `userData?.currentSong || userData?.songs[0]` to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -715,7 +715,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
index f3ddbd69422..00d4f9f428b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
@@ -16,7 +16,7 @@ Don't forget you need template interpolation here, so you need to use backticks.
 You should not modify the existing `setPlayButtonAccessibleText` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `setAttribute()` method on `playButton`.
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
index 1ef0bee81bb..7aae6969fb9 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
@@ -14,7 +14,7 @@ Now, call the `setPlayButtonAccessibleText` function inside the `playSong` funct
 You should call the `setPlayButtonAccessibleText` inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayButtonAccessibleText\(\);?/)
+assert.match(code, /setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -707,7 +707,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
index b99582acc88..7de31168f81 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
@@ -28,13 +28,13 @@ assert.isFunction(shuffle)
 Your `shuffle` function should use an arrow syntax and should not take a parameter.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `shuffle` function  should be empty.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -729,7 +729,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
index 1a65e7e45ed..32bc6f2d77c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
@@ -24,7 +24,7 @@ Use the `sort()` method on the `userData?.songs` array. Pass a callback to the m
 You should not modify the existing `shuffle` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*{\s*[\s\S]*?\};?/);
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*{\s*[\s\S]*?\};?/);
 ```
 
 You should use the `sort()` method on `userData?.songs`.
@@ -42,7 +42,7 @@ assert.match(code, /userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*/)
 The callback of your `sort()` method should return `Math.random() - 0.5`.
 
 ```js
-assert.match(code, /userData\?.songs\.sort\s*\(\(\)\s*=>(\s*{\s*return\s+Math\.random\(\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\)\s*-\s*0\.5\s*)\);?/);
+assert.match(code, /userData\?.songs\.sort\s*\(\s*\(\s*\)\s*=>(\s*{\s*return\s+Math\.random\(\s*\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\s*\)\s*-\s*0\.5\s*)\s*\);?/);
 ```
 
 # --seed--
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -739,7 +739,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
index 75ec7807ff7..d1e2e986196 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
@@ -11,6 +11,8 @@ When the shuffle button is pressed, you want to set the `currentSong` to nothing
 
 Set `userData.currentSong` to `null` and `userData.songCurrentTime` to `0`.
 
+*Note*: You should not use optional chaining for this step because you are explicitly setting the `currentSong` and `songCurrentTime` properties to be `null` and `0` respectively.
+
 # --hints--
 
 You should set `userData.currentSong` to `null`.
@@ -620,7 +622,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -720,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
index a27bd676be5..3377b4ce1ed 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
@@ -16,31 +16,31 @@ Call the `renderSongs` function and pass in `userData?.songs` as an argument. Al
 You should not modify the existing `shuffle` function and its content.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -741,7 +741,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
index 717e6600b5e..6d31a365928 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
@@ -22,13 +22,13 @@ assert.match(code, /shuffleButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 You should pass in `shuffle` as the second value of your `click` event listener.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1,\s*shuffle\);?/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1,\s*shuffle\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
index 3dafca11e5c..27a02445e4f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -746,7 +746,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
index 67cdacc91b6..38509a2c78f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
@@ -7,7 +7,7 @@ dashedName: step-73
 
 # --description--
 
-Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData.songs` array.
+Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData?.songs` array.
 
 The `filter` method keeps only the elements of an array that satisfy the callback function passed to it:
 
@@ -20,12 +20,14 @@ console.log(numsGreaterThanThree) // Output: [10, 8, 4, 5]
 
 Use the `filter()` method on `userData?.songs`. Pass in `song` as the parameter of the arrow function callback and use implicit return to check if `song.id` is strictly not equal to `id`. Assign all of that to the `userData.songs`.
 
+*Note*: You should not use optional chaining when you assign the result of  `userData?.songs.filter` to `userData.songs` because the `allSongs` array will not be `undefined` or `null` at that point.
+
 # --hints--
 
 You should not modify the existing `deleteSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should use the `filter()` method on `userData?.songs`.
@@ -647,7 +649,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -757,7 +759,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
index 88ef435282e..65d57d5ba24 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
@@ -18,25 +18,25 @@ After that, call the `highlightCurrentSong` function to highlight the current so
 You should not modify the existing `deleteSong` function and its content.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -634,7 +634,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -745,7 +745,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
index 80b0fd299c6..f2d66cfbae3 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
@@ -16,7 +16,7 @@ Use an `if` statement to check if the `userData?.currentSong?.id` is equal to th
 You should create an empty `if` statement with the condition `userData?.currentSong?.id === id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
index b984263e666..71ab2c0ddae 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
@@ -16,31 +16,31 @@ After that, call the `pauseSong()` function to stop the playback and the `setPla
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.currentSong` to `null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.songCurrentTime` to `0`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*.*\s*\}/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -755,7 +755,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
index 2828f6eaf5d..0caa711bf0d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
@@ -9,14 +9,14 @@ dashedName: step-78
 
 Next, you need to check if the playlist is empty. If it is, you should reset the `userData` object to its original state.
 
-Use an `if` statement to check if the `userData.songs` has a length of `0`.
+Use an `if` statement to check if the `userData?.songs` has a length of `0`.
 
 # --hints--
 
-You should create an empty `if` statement with the condition `userData.songs.length === 0`
+You should create an empty `if` statement with the condition `userData?.songs.length === 0`.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -738,7 +738,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
index b7d622db948..d693d2206d0 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
@@ -33,19 +33,19 @@ Inside your `if` statement, declare a `resetButton` constant, then use `createEl
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*.*\s*\}/)
 ```
 
 You should use the `createElement` method to create a `button`.
 
 ```js
-assert.match(code, /document\.createElement\(('|")button\1\);?/)
+assert.match(code, /document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 You should assign your newly created `button` element to a `resetButton` constant.
 
 ```js
-assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?/)
+assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 # --seed--
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -708,7 +708,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
 
   }
 --fcc-editable-region--
@@ -769,7 +769,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
index 6d7241dae08..158a28d8ebe 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
@@ -18,7 +18,7 @@ Set the `id` attribute of `resetButton` to `reset` and its `aria-label` attribut
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should use `resetButton.id` to create an `id` attribute named `reset` for the `resetButton`.
@@ -628,7 +628,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
index 41d0718c0c1..2b80cd4ec37 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
@@ -32,7 +32,7 @@ assert.match(code, /resetButton\.appendChild\(/)
 You should pass in `resetText` as the value of your first `appendChild()`.
 
 ```js
-assert.match(code, /resetButton\.appendChild\(resetText\);?/)
+assert.match(code, /resetButton\.appendChild\(\s*resetText\s*\);?/)
 ```
 
 You should use the `appendChild()` method on `playlistSongs`.
@@ -44,7 +44,7 @@ assert.match(code, /playlistSongs\.appendChild\(/)
 You should pass in `resetButton` as the value of your second `appendChild()`.
 
 ```js
-assert.match(code, /playlistSongs\.appendChild\(resetButton\);?/)
+assert.match(code, /playlistSongs\.appendChild\(\s*resetButton\s*\);?/)
 ```
 
 # --seed--
@@ -642,7 +642,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -773,7 +773,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
index e3af0584db3..ea713e1c7ab 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
@@ -22,13 +22,13 @@ assert.match(code, /resetButton\.addEventListener\(/)
 Your `resetButton` event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 The callback function of your event listener should use arrow syntax and have an empty pair of curly braces.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -690,7 +690,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -760,7 +760,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
index 6c08e091e7f..e6638f756ca 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
@@ -7,22 +7,22 @@ dashedName: step-84
 
 # --description--
 
-You need to assign the `userData.songs` property to the initial `allSongs` array. This will reset the playlist to its original state.
+To reset the playlist to its original state, spread `allSongs` into an array and assign it to `userData.songs`.
 
-Spread `allSongs` into an array and assign it to `userData.songs`.
+*Note*: You should not use optional chaining for the `userData.songs` because the song will not be `null` or `undefined` at this point.
 
 # --hints--
 
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\s*\);?/)
 ```
 
 You should assign `[...allSongs]` to `userData.songs`.
 
 ```js
-assert.match(code, /userData\.songs\s*=\s*\[\.\.\.allSongs\]/)
+assert.match(code, /userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -684,7 +684,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
index 3516c47b62c..0d40749a0c6 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
@@ -22,25 +22,25 @@ Remove the reset button from the playlist by calling the `remove()` method on th
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*.*\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*.*\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
 You should use the `remove()` method to remove the `resetButton` from the DOM.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*resetButton\.remove\(\);?\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*resetButton\.remove\(\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -702,7 +702,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -776,7 +776,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
index 5881a3faef5..429ede76710 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
@@ -24,13 +24,13 @@ assert.match(code, /audio\.addEventListener\(/)
 The event listener you used on on your `audio` variable should listen for an `ended` event.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback to your `ended` event listener.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 
@@ -629,7 +629,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -768,7 +768,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
index b7c4a2e1b62..3a250374257 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
@@ -7,14 +7,14 @@ dashedName: step-77
 
 # --description--
 
-Within the button element in the `renderSongs` function, add an `onclick` attribute as the first attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
+Within the button element in the `renderSongs` function, add an `onclick` attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
 
 # --hints--
 
-You should add an `onclick` attribute as the first attribute of the delete button and pass in `deleteSong(${song.id})`.
+You should add an `onclick` attribute to the delete button and pass in `deleteSong(${song.id})`.
 
 ```js
-assert.match(code, /<button\s+onclick=('|")deleteSong\(\$\{song\.id\}\)\1\s*class=('|")playlist-song-delete\2\s*aria-label=('|")Delete\s*\$\{song\.title\}\3\s*>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")deleteSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
index 84aa8d54565..9fc3fc7b67d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
@@ -7,30 +7,35 @@ dashedName: step-87
 
 # --description--
 
-Notice that the album art in the HTML and songs in the `allSongs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
+Notice that the album art in the HTML and songs in the `userData.songs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
 
 Next, you need to check if there is a next song to play. Retrieve the current song index by calling the `getCurrentSongIndex()` function, and save it in a `currentSongIndex` constant.
 
-After that, create a `nextSongExists` constant that checks if a next song exists.
+After that, create a `nextSongExists` constant that contains the boolean value `true` or `false` depending on if the next song exists.
 
 # --hints--
 
 You should not modify the existing `ended` event listener and its content.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should create a `currentSongIndex` constant and set it to the calling of the `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
-You should check if a next song exists with `userData?.songs[currentSongIndex + 1] !== undefined` and set it to a `nextSongExists` constant.
+You should check if a next song exists comparing `userData.songs.length` and `currentSongIndex` and set it to a `nextSongExists` constant. If the last index of the songs array (`userData.songs.length - 1`) is bigger than the currentSongIndex that means there is a next song.
 
 ```js
-assert.match(code, /const\s+nextSongExists\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\]\s*!==\s*undefined;?/)
+const secondPart = code.split(`audio.addEventListener("ended", () => {`)[1];
+const middlePart = secondPart.split("});")[0]
+const codeOutputFirstTest = eval(middlePart + "\nnextSongExists;");
+assert.strictEqual(codeOutputFirstTest, true);
+const codeOutputSecondTest = eval(`\nfunction getCurrentSongIndex() { return 100; };\n` + middlePart + "\nnextSongExists;")
+assert.strictEqual(codeOutputSecondTest, false);
 ```
 
 # --seed--
@@ -593,7 +598,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -657,7 +662,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -732,7 +737,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
index d3d73d29fb5..c9d3321bde4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
@@ -14,13 +14,13 @@ Use an `if` statement to check if `nextSongExists` exists, then call the `playNe
 You should create an `if` statement with the condition `nextSongExists`.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*/)
 ```
 
 You should call the `playNextSong` function inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -583,7 +583,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -647,7 +647,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
index ae06f435512..f06ac40b00d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
@@ -14,25 +14,25 @@ If there is no next song in the playlist, use the `else` block to reset the `cur
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `currentSong` property of `userData` to `null` in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `songCurrentTime` property of `userData` to `0` in the `else` block of your `if`statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
 ```
 
 # --seed--
@@ -595,7 +595,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -659,7 +659,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
index 293c555386b..26c627f80b5 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
@@ -17,28 +17,28 @@ You should call the `pauseSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /pauseSong\(\);?/)
+assert.match(splitter[1], /pauseSong\(\s*\);?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /setPlayerDisplay\(\);?/)
+assert.match(splitter[1], /setPlayerDisplay\(\s*\);?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -636,7 +636,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -775,7 +775,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
@@ -1418,7 +1418,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -1482,7 +1482,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -1557,7 +1557,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
index 6226488d3e4..0cddaad5356 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
@@ -26,7 +26,7 @@ Inside the `userData` object create a `songs` property. For the value, spread `a
 Your `userData` object should have a `songs` key set to `[...allSongs]`.
 
 ```js
-assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\],?/);
+assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\]\s*,?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
index 936af7af501..584dd1e989b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
@@ -14,7 +14,7 @@ To handle the current song's information and track its playback time, create a `
 You should not modify the existing `userData` object and its content.
 
 ```js
-assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\.\.\.allSongs\],?\s*/);
+assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\s*\.\.\.allSongs\s*\]\s*,?\s*/);
 ```
 
 Your `userData` object should have a `currentSong` key set to `null`.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
index c1947d1912e..34ed9b1be77 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
@@ -9,26 +9,26 @@ dashedName: step-30
 
 Add an `else` block to handle the current song's position in the playlist.
 
-Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData.songCurrentTime`.
+Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData?.songCurrentTime`.
 
 # --hints--
 
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 You should add an `else` block to the existing `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
 ```
 
-You should set `audio.currentTime` to `userData.songCurrentTime` inside the `else` block of your `if` statement.
+You should set `audio.currentTime` to `userData?.songCurrentTime` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\.songCurrentTime;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\?\.songCurrentTime;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
index 5ee9604f1ef..1cee8989f37 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
@@ -20,7 +20,7 @@ assert.match(code, /playlistSongElements\.forEach\(\s*(\(\s*songEl\s*\)|songEl)\
 You should use the `removeAttribute()` method on `songEl` and pass in `"aria-current"`.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(('|")aria-current\1\);?\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(\s*('|")aria-current\1\s*\);?\s*\}\s*\);?/)
 ```
 
 
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -691,7 +691,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
index 8ce5d69916e..2c4c95e38fe 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
@@ -13,10 +13,10 @@ Don't forget you need to interpolate with the dollar sign here.
 
 # --hints--
 
-You should add an `onclick` with the value `playSong(${song.id})` as the second attribute and value of the `button` element.
+You should add an `onclick` attribute with the value `playSong(${song.id})` to the `button` element.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-info\1\s*onclick\s*=\s*('|")playSong\(\$\{song\.id\}\)\2\s*>\s*<span\s+class\s*=\s*('|")playlist-song-title\3\s*>\$\{song\.title\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-artist\4\s*>\$\{song\.artist\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-duration\5\s*>\$\{song\.duration\}<\/span>\s*<\/button>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")playSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
index 32686c4e670..8b75180912b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
@@ -28,19 +28,19 @@ Use the `createTextNode()` method to create a `Reset Playlist` text, then assign
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*\}/)
 ```
 
 You should use `document.createTextNode()` to create a `Reset Playlist` text.
 
 ```js
-assert.match(code, /document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 You should assign your created text node to a `resetText` constant.
 
 ```js
-assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -703,7 +703,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
 
 
@@ -766,7 +766,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
index ade24f064eb..9c179ac8a6e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
@@ -23,13 +23,13 @@ Pass in a callback function to the `map()` method. The callback function should
 The callback function of your `map()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?.*\)?\s*=>\s*\{\s*\}\)/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(.*\)|[^()]+)\s*=>\s*\{\s*\}\s*\)/)
 ```
 
 Your `map()` method should have a `song` parameter in it's callback function.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?song\)?/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
index 2d423ddca69..739a17e8afa 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
@@ -14,20 +14,20 @@ const animals = ["dog", "cat", "horse"];
 animals.indexOf("cat") // 1
 ```
 
-Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData.currentSong`.
+Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData?.currentSong`.
 
 # --hints--
 
 You should return `userData?.songs.indexOf()` inside your `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\()|(\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(|\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
 ```
 
-You should pass in `userData.currentSong` into the `indexOf()` method.
+You should pass in `userData?.currentSong` into the `indexOf()` method.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\(userData\.currentSong\);?)|(\s*{\s*return\s+userData\?\.songs\.indexOf\(userData\.currentSong\);?)/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?|\s*{\s*return\s+userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?\s*})/)
 ```
 
 # --seed--
@@ -625,7 +625,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
index 69e31d7e010..ab47938172e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
@@ -23,7 +23,7 @@ Add the `sort()` method to `userData?.songs`.
 You should add the `sort()` method to `userData?.songs`.
 
 ```js
-assert.match(code, /userData\?\.songs\.sort\(*.\);?/);
+assert.match(code, /userData\?\.songs\.sort\(.*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
index 5b54071ab1b..b68cd3f244a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
@@ -18,25 +18,25 @@ Le variabili non cambieranno, quindi usa `const` per dichiararle.
 Dovresti usare `document.getElementById()` per selezionare l'elemento `#author-container`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 Dovresti assegnare l'elemento `#author-container` alla variabile `authorContainer`. Non dimenticare di utilizzare `const` per dichiarare la variabile.
 
 ```js
-assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 Dovresti usare `document.getElementById()` per selezionare l'elemento `#load-more-btn`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 Dovresti assegnare l'elemento `#load-more-btn` alla variabile `loadMoreBtn`. Non dimenticare di utilizzare `const` per dichiarare la variabile.
 
 ```js
-assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
index 274b7d6531c..ad02ca27331 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
@@ -22,13 +22,13 @@ Fai una richiesta `GET` a questo URL: `https://cdn.freecodecamp.org/curriculum/n
 Dovresti usare il metodo `fetch()` per fare una richiesta `GET` a `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Non dovresti avere un punto e virgola dopo la chiamata di `fetch`.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
index bb2aa2e7a39..483db61f75e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
@@ -27,37 +27,37 @@ Di nuovo, non terminare ancora il codice con un punto e virgola.
 Dovresti usare il metodo `fetch()` per fare una richiesta `GET` a `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Dovresti concatenare il metodo `.then()` al metodo `fetch()`
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(/)
 ```
 
 Dovresti aggiungere un parametro `res` al metodo `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
 ```
 
 Il metodo `.then()` dovrebbe usare la sintassi delle funzioni freccia.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
 ```
 
 Dovresti mostrare il parametro `res` sulla console in modo da poter vedere l'oggetto `Response`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 Non dovresti avere un punto e virgola dopo `.then()`.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
index c1bc37d4f8c..26fa4d62b88 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
@@ -16,19 +16,19 @@ Rimuovi `console.log(res)` e restituisci implicitamente `res.json()` invece.
 Dovresti rimuovere `console.log(res)`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*console\.log\(res\)\)/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 Dovresti restituire implicitamente `res.json()` in `.then()`.
 
 ```js
-assert.match(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\)/)
+assert.match(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)/)
 ```
 
 Non dovresti avere un punto e virgola dopo `.then()`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\);/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\);/)
 ```
 
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
index c06a380218a..a1be91774c5 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
@@ -17,7 +17,7 @@ Concatena un altro metodo `.then()` al metodo `.then()` esistente. Stavolta pass
 Dovresti usare il metodo `fetch()` per fare una richiesta `GET` a `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Il primo `.then()` non dovrebbe avere un punto e virgola.
@@ -29,37 +29,37 @@ assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*
 Dovresti concatenare un altro metodo `.then()` al `.then()` esistente.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 Dovresti aggiungere un parametro `data` al secondo metodo `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Il secondo metodo `.then()` dovrebbe usare la sintassi delle funzioni freccia.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Il secondo metodo `.then()` dovrebbe avere delle parentesi graffe.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Il secondo metodo `.then()` dovrebbe stampare `data` sulla console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
 ```
 
 Il secondo `.then()` non dovrebbe essere seguito da un punto e virgola.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
index 6297a84f109..b5f02cf7704 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
@@ -18,67 +18,67 @@ Concatena `.catch()` all'ultimo `.then()`. Passagli una funzione callback con `e
 Dovresti usare il metodo `fetch()` per fare una richiesta `GET` a `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Dovresti concatenare un altro metodo `.then()` al `.then()` esistente.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 Dovresti aggiungere un parametro `data` al secondo metodo `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Il secondo metodo `.then()` dovrebbe usare la sintassi delle funzioni freccia.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Il secondo metodo `.then()` dovrebbe avere delle parentesi graffe.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Il secondo metodo `.then()` dovrebbe stampare `data` sulla console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)/)
 ```
 
 Il secondo `.then()` non dovrebbe avere un punto e virgola.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\);/)
 ```
 
 Dovresti concatenare il metodo `.catch()` al secondo `.then()` già esistente.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
 ```
 
 Dovresti aggiungere un parametro `err` al metodo `.catch()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
 ```
 
 Il metodo `.catch()` dovrebbe usare la sintassi delle funzioni freccia.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
 ```
 
 Your `.catch()` method should use `console.error()` to log `err` to the console with the text `` `There was an error: ${err}` ``. Non dimenticate di usare i backtick.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\)\s*;?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
index 3c61fffc5f5..344e8811596 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
@@ -48,7 +48,7 @@ assert.match(code, /let\s+authorDataArr/)
 Dovresti impostare la variabile `authorDataArr` su un array vuoto (`[]`).
 
 ```js
-assert.match(code, /let\s+authorDataArr\s*=\s*\[\];?/)
+assert.match(code, /let\s+authorDataArr\s*=\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
index db1758144af..3e3c87efcf9 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
@@ -14,7 +14,7 @@ All'interno della funzione `displayAuthors`, concatena `.forEach()` a `authors`.
 Dovresti concatenare `.forEach()` a `authors`.
 
 ```js
-assert.match(code, /authors\.forEach\(\)/)
+assert.match(code, /authors\.forEach\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
index d4f728d5b6a..9a5c5b94732 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
@@ -34,7 +34,7 @@ assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*/)
 La funzione callback dovrebbe essere vuota.
 
 ```js
-assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\)\s*=>\s*\{\s*\}\s*\);?/)
+assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
index 94cbad9b9d5..ccfdda9538b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
@@ -16,7 +16,7 @@ Per prima cosa, rimuovi l'istruzione `console.log()`. Poi, assegna `data` alla v
 Dovresti rimuovere il console log che mostra `data`.
 
 ```js
-assert.notMatch(code, /console\.log\(data\);/)
+assert.notMatch(code, /console\.log\(\s*data\s*\);/)
 ```
 
 Dovresti assegnare `data` alla variabile `authorDataArr`
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
index 4b6b50d5d00..86b1ba90e96 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
@@ -22,19 +22,19 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 Dovresti avere un console log con il testo `Author Data Array:`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1/)
 ```
 
 Dovresti usare la virgola per separare il testo `Author Data Array:` e `authorDataArr`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,/)
 ```
 
 `authorDataArr` should be the second argument of your console log statement.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
index 8febb048824..ccb738a5a1a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
@@ -22,7 +22,7 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 Dovresti rimuovere l'istruzione console log che mostra `authorDataArr`
 
 ```js
-assert.notMatch(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.notMatch(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 Dovresti chiamare la funzione `displayAuthors`.
@@ -34,19 +34,19 @@ assert.match(code, /displayAuthors\(/)
 Dovresti chiamare la funzione `displayAuthors` e passare l'argomento `authorDataArr.slice()`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 Il primo parametro del metodo `slice()` dovrebbe essere `startingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 Il secondo parametro del metodo `slice()` dovrebbe essere `endingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\);?/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
index 48f77736052..34c6f41228d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
@@ -34,13 +34,13 @@ assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*/)
 La funzione `fetchMoreAuthors` dovrebbe usare la sintassi freccia.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 La funzione `fetchMoreAuthors` dovrebbe essere vuota.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*\{\s*\}/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
index df5b823c1d4..c7ce26f4f53 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
@@ -24,21 +24,21 @@ Dovresti chiamare la funzione `displayAuthors` e passare l'argomento `authorData
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first argument of your `slice()` method should be `startingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second argument of your `slice()` method should be `endingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\)/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
index 1b923b37a0a..cda8b4fe768 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
@@ -24,13 +24,13 @@ assert.match(code, /loadMoreBtn\.addEventListener\(/)
 L'event listener dovrebbe essere in ascolto per l'evento `click`.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 L'event listener dovrebbe prendere `fetchMoreAuthors` come funzione da eseguire.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1,\s*fetchMoreAuthors\);?/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1,\s*fetchMoreAuthors\s*\);?/)
 ```
 
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
index 6e0d91094af..a27e60984fa 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
@@ -24,13 +24,13 @@ assert.match(code, /if\s*\(/)
 L'istruzione `if` dovrebbe prendere `authorDataArr.length <= endingIndex` come condizione.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*/)
 ```
 
 L'istruzione `if` dovrebbe essere vuota.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
index 6f6a8063626..02be35501c8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
@@ -28,22 +28,21 @@ assert.match(code, /<p\s*class=("|')bio\1>/);
 Dovresti controllare se la lunghezza del testo di `bio` è maggiore di `50`.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50/)
+assert.match(code, /<p\s*class=("|')bio\1>\s*\$\{\s*bio\.length\s*>\s*50/)
 ```
 
 Se il testo di `bio` è più lungo di `50` caratteri, dovresti estrarre i primi 50 caratteri con `slice()` e sostituire il resto con `...`. Non dimenticare che gli indici partono da zero.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:/);
 ```
 
 Se il testo di `bio` è inferiore a 50 caratteri, utilizza direttamente il testo di `bio`.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:\s*bio\s*\}<\/p>/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:\s*bio\s*\}\s*<\/p>/);
 ```
 
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
index 4cf3c0e6ce5..9a997d85af5 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
@@ -16,7 +16,7 @@ All'interno di `.catch()`, rimuovi `console.error()` e imposta l'`innerHTML` di
 Dovresti rimuovere `console.error` e il suo testo.
 
 ```js
-assert.notMatch(code, /console\.error\(`There\s+was\s+an\s+error:\s+\$\{err\}`\);/)
+assert.notMatch(code, /console\.error\(\s*`There\s+was\s+an\s+error:\s+\$\{err\}`\s*\);/)
 ```
 
 Dovresti accedere all'`innerHTML` di `authorContainer` e impostarlo su un elemento `p`. Non dimenticare di racchiudere l'elemento `p` in un template literal.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
index ac6f9b074d7..5050e419364 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
@@ -96,19 +96,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
index 9a7e96e1dfc..83b7484001d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
@@ -120,19 +120,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
index 339eb4cc728..2d4eaf80d63 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
@@ -111,19 +111,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
index 015992e2b72..53becbb3a1f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
index c9852e48731..df3fe4b192b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
@@ -7,8 +7,9 @@ dashedName: step-5
 
 # --description--
 
-Ora crea un `fieldset` con un `id` impostato su `lunch` e degli elementi `legend` e `div` corrispondenti.
+Next, create a `fieldset` element with the `id` set to `lunch`.
 
+Within that element, create a `legend` element with the text `Lunch`, and an empty `div` with the `class` set to `input-container`.
 # --hints--
 
 Dovresti creare un secondo elemento `fieldset` all'interno del `form`.
@@ -138,19 +139,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
index 6e728288e10..66db4eadf2f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
index a5bf1ed8eb5..8dc9a3af25d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
@@ -188,19 +188,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
index 217a63244c8..8c688b7b196 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
index 35c7267d9d2..8b3bab7145f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
@@ -190,19 +190,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
index 87074dcfd0a..19d3ac196dd 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
@@ -196,19 +196,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
index a845690bbe5..eb8adf48cf1 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
index 85ea2756bca..20150e2b863 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
index b361c49e302..ab8fed7c514 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
index 0e321d27c4d..2292a31b52c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
@@ -29,13 +29,13 @@ Dovresti creare una variabile chiamata `calorieCounter`.
 assert.isDefined(calorieCounter);
 ```
 
-Dovresti usare `document.getElementById()` per selezionare l'elemento `#calorie-counter`.
+You should have `document.getElementById('calorie-counter')` in your code.
 
 ```js
 assert.match(code, /document\.getElementById\(\s*('|")calorie-counter\1\s*\)/g);
 ```
 
-Dovresti memorizzare l'elemento `#calorie-counter` in una variabile chiamata `calorieCounter`.
+You should assign `document.getElementById('calorie-counter')` to your `calorieCounter` variable.
 
 ```js
 assert.equal(calorieCounter, document.getElementById('calorie-counter'));
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
index d41c423827d..1502f45333e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
index 0524d476522..62710f398cc 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
index 59b7ae57223..cf9388c1233 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
@@ -7,6 +7,13 @@ dashedName: step-17
 
 # --description--
 
+In programming, it is standard practice to prefix a variable with `is` or `has` to indicate that the variable is a boolean.
+
+```js
+let isRunning = true;
+let hasCompleted = false;
+```
+
 Dichiara una variabile `isError` e impostala su `false`, ma usa `let` per poterla riassegnare in seguito.
 
 # --hints--
@@ -148,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
index 8f3ae3be55f..5ea12d82a65 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
@@ -28,7 +28,7 @@ assert.isFunction(cleanInputString);
 Your `cleanInputString` function should take a `str` parameter.
 
 ```js
-assert.match(cleanInputString?.toString(), /\(str\)/);
+assert.match(cleanInputString?.toString(), /\(\s*str\s*\)/);
 ```
 
 `cleanInputString` dovrebbe essere una funzione vuota.
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
index e55193f29b2..bb3dccbf539 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
index 5ef983e6774..b220b581ab1 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
index d595ad24034..b6787f360dd 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
index 61be31eaa63..05c0e4db004 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
@@ -7,24 +7,26 @@ dashedName: step-22
 
 # --description--
 
-Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. Se non lo è, usa `push` per aggiungerlo a `cleanStrArray`.
-
 You will need to check if the array `["+", "-", " "]` does not include the current character. You can use a combination of the <dfn>includes()</dfn> method and the <dfn>!</dfn> operator to do this.
 
 The `.includes()` method returns `true` if the array contains the character, and `false` if not. The logical NOT operator (`!`) will return the opposite of the value of the `.includes()` method.
 
-Here is an example:
+Here is an example checking if the current character is not in the vowels array. If it is not, that current character is pushed into the `consonantArray`:
 
 ```js
-const numbersArray = [1, 2, 3, 4, 5]
-const number = 6
+const inputString = "Hello World";
+const charArray = inputString.split('');
+const consonantArray = [];
 
-if (!numbersArray.includes(number)) {
-  console.log("The number is not in the array.")
+for (let i = 0; i < charArray.length; i++) {
+  if (!['a', 'e', 'i', 'o', 'u'].includes(charArray[i])) {
+    consonantArray.push(charArray[i]);
+  }
 }
-
 ```
 
+Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. Se non lo è, usa `push` per aggiungerlo a `cleanStrArray`.
+
 # --hints--
 
 Il loop `for` dovrebbe avere un'istruzione `if`.
@@ -37,19 +39,19 @@ Il loop `for` dovrebbe usare `!["+", "-", " "].includes()`.
 
 ```js
 // the loop protection injects code so we have to look at the raw code directly
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(/);
 ```
 
-Il loop `for` dovrebbe vedere se `strArray[i]` si trova in `["+", "-", " "]`.
+Your `for` loop should see if `!["+", "-", " "].includes(strArray[i])`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?/);
 ```
 
 Il loop `for` dovrebbe aggiungere con `push` `strArray[i]` a `cleanStrArray`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\[i\]\s*\)\s*;?\s*(\s*\})?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*;?\s*(\s*\})?/);
 ```
 
 # --seed--
@@ -171,19 +173,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
index 74810e9d63a..85fb7147a3c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
@@ -168,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
index 65607ecb2ed..4d6a846187b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
index 1bfe93bd523..6e7b5442220 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
index 8da2a28ec47..f3ec5a852b5 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
index 359ebe83661..f27497a7950 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
index e37385e1498..cfa1573aaef 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
index 2b8077dad79..6d6b6540e6b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
index 0aa4a066d18..f1498da4750 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
index 6cd0db980f6..0d2685b1a23 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
index a42ee57cf5f..4aaa18c2496 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
index 80cd180ea95..1bca75b7c5d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
index 4483776c3a8..dab399f0e3f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
index 15f53adfab3..f6405a1a930 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
@@ -6,8 +6,13 @@ dashedName: step-35
 ---
 
 # --description--
+Strings have a <dfn>.match()</dfn> method, which takes a regex argument. `.match()` restituisce un array con i risultati trovati – contenente la prima corrispondenza o tutte, se viene usata l'opzione globale.
 
-Le stringhe hanno un metodo `.match()` che richiede un argomento regex. `.match()` restituisce un array con i risultati trovati – contenente la prima corrispondenza o tutte, se viene usata l'opzione globale.
+```js
+const str = 'example string';
+const regex = /example/;
+const result = str.match(regex); // Returns ['example']
+```
 
 Restituisci il risultato della chiamata del metodo `.match()` su `str` e passa la variabile `regex` come argomento. Userai il risultato di match più avanti.
 
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
index 36e8d2033a1..042fab4aec8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
index bee7bca64fa..08597dd0460 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
index 4d43e5fc6c3..7d338b1df97 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
index 34ba9b7eb66..2beac874828 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
@@ -26,13 +26,13 @@ Sostituisci la stringa concatenata nel `querySelector` con un template literal 
 Dovresti usare un template literal nel metodo `querySelector`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`.*`\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`.*`\s*\)/);
 ```
 
 Il template literal dovrebbe avere il valore `{targetId} .input-container`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`\$\{targetId\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`\$\{targetId\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
index d2ffc6c06b6..6a2e10be927 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
@@ -20,13 +20,13 @@ assert.notMatch(addEntry.toString(), /targetId\s*=/);
 Dovresti sostituire il riferimento a `targetId` nel template literal con `entryDropdown.value`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 Dovresti aggiungere un `#` all'inizio del template literal.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
index 4ab72afa738..e7476c8b7b9 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
index be1afc0300b..9002acafff2 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
@@ -24,13 +24,13 @@ assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.query
 Dovresti accedere alla proprietà `length` di `querySelectorAll()`.
 
 ```js
-assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 La variabile `entryNumber` dovrebbe essere la lunghezza (`length`) di `querySelectorAll`.
 
 ```js
-assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 # --seed--
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
index 52e960946c2..443f336d052 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
index 690448761a4..84b9f0a8bdd 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
@@ -20,7 +20,7 @@ assert.match(code, /HTMLString\s*=\s*`\n\s*<label>.*<\/label>/);
 L'elemento `label` dovrebbe avere il testo `Entry ${entryNumber} Name`.
 
 ```js
-assert.match(code, /HTMLString\s*=\s*`\n\s*<label>Entry\s\$\{entryNumber\}\sName<\/label>/);
+assert.match(code, /HTMLString\s*=\s*`\n\s*<label>\s*Entry\s\$\{entryNumber\}\sName\s*<\/label>/);
 ```
 
 # --seed--
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
index c3804461b0c..de0c4528f97 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
index 0d50f5aa619..4d3d2e9f17f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
index 84ade40d092..e3badc06ada 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
index 19b98ca7021..4f259e6312b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
@@ -185,19 +185,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
index 778a04c01e8..8dc11843364 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
@@ -172,19 +172,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
index 8a48f5057b8..0573ac34e70 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
index ff3fabaa72a..d3a62356f0d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
index 2990290c681..40a5eaa89cf 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
@@ -146,19 +146,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
index 42d79896ebc..cfc19ef1907 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
index 7d1ff533c98..a955431aa36 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
@@ -9,7 +9,25 @@ dashedName: step-50
 
 Nel progetto del gioco di ruolo hai imparato come definire il comportamento di un pulsante modificando la sua proprietà `onclick`. Puoi anche modificare il comportamento di un elemento aggiungendo un event listener (ascoltatore di eventi).
 
-Chiama il metodo `.addEventListener()` su `addEntryButton`. It takes two arguments. Il primo è l'evento da intercettare – dovresti passare la stringa `click`. Il secondo è la funzione callback, o la funzione che viene eseguita quando l'evento viene attivato. Passa la funzione `addEntry` come secondo argomento. Nota che non dovresti *chiamare* `addEntry`, ma passare direttamente la variabile (o <dfn>riferimento della funzione</dfn>).
+The following example uses the `addEventListener` method to add a click event to a button. When the button is clicked, the `printName` function is called.
+
+```html
+<button class="btn">Print name</button>
+```
+
+```js
+const button = document.querySelector('.btn');
+function printName() {
+  console.log("Jessica");
+}
+button.addEventListener('click', printName);
+```
+
+The `addEventListener` method takes two arguments. The first is the event to listen to. (Ex. `'click'`) The second is the callback function, or the function that runs when the event is triggered.
+
+Call the `.addEventListener()` method on the `addEntryButton`. Pass in the string `click` for the first argument and the `addEntry` function for the second argument.
+
+Nota che non dovresti *chiamare* `addEntry`, ma passare direttamente la variabile (o <dfn>riferimento della funzione</dfn>).
 
 # --hints--
 
@@ -150,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
index 3d4beadc4aa..650eb23ca20 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
index 1815d5b64a9..152eab5bf54 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
@@ -7,34 +7,26 @@ dashedName: step-56
 
 # --description--
 
-Il parametro `list` sarà il risultato di un selettore, che restituirà un `NodeList`. Un `NodeList` è un oggetto array-like che contiene gli elementi che corrispondono al selettore.
+Il parametro `list` sarà il risultato di un selettore, che restituirà un `NodeList`. A `NodeList` is a list of elements like an array. It contains the elements that match the query selector. You will need to loop through these elements in the list.
 
-Dovrai iterare su questi elementi, quindi inizia creando un loop `for`. L'iteratore `i` dovrebbe partire da `0`, continuare finché è inferiore alla lunghezza della lista, e incrementare di `1` a ogni iterazione.
+In previous steps, you learned how to loop through an array using a `for` loop. You can also use a <dfn>for...of</dfn> loop to loop through an array and a `NodeList`.
+
+A `for...of` loop is used to iterate over elements in an iterable object like an array. The variable declared in the loop represents the current element being iterated over.
+
+```js
+for (const element of elementArray) {
+  console.log(element);
+}
+```
+
+Create a `for...of` loop that loops through the list. For the loop's variable name, use `const` to declare a variable called `item`.
 
 # --hints--
 
-La funzione `getCaloriesFromInputs` dovrebbe avere un loop `for`.
+You should have a `for...of` loop that loops through the `list` parameter. Use `item` for the loop's variable name.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(/g);
-```
-
-Il loop `for` dovrebbe inizializzare una variabile chiamata `i` a `0`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;/g);
-```
-
-Il loop `for` dovrebbe avere una condizione che verifica se `i` è minore della lunghezza di `list`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;/g);
-```
-
-Il loop `for` dovrebbe incrementare `i` di `1` a ogni esecuzione. Usa l'operatore di incremento per questo.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)/g);
+assert.match(code, /for\s*\(\s*const\s+item\s+of\s+list\s*\)\s*\{/);
 ```
 
 # --seed--
@@ -156,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
index aa4345275b5..13365944e38 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
@@ -9,40 +9,20 @@ dashedName: step-57
 
 I valori di `NodeList` che passerai a `list` consisteranno in elementi `input`. Quindi ti interessa l'attributo `value` di ogni elemento.
 
-Assegna il `value` dell'elemento in `list` all'indice `i` a una variabile chiamata `currVal`.
+Assign `item.value` to a `const` variable called `currVal`.
 
 # --hints--
 
-Dovresti avere una variabile `currVal`.
+You should use `const` to declare a new variable called `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=/);
+assert.match(code, /const\s+currVal\s*=/);
 ```
 
-Dovresti accedere all'elemento in `list` all'indice `i` usando la notazione con parentesi.
+You should assign `item.value` to `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]/);
-```
-
-Dovresti accedere all'attributo `value` dell'elemento in `list` all'indice `i`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]\.value/);
-```
-
-Dovresti assegnare il `value` dell'elemento in `list` all'indice `i` a una variabile chiamata `currVal`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*list\[i\]\.value/);
-```
-
-L'assegnazione di `currVal` dovrebbe essere nel loop `for`.
-
-```js
-// another hack, because the loop protection injects stuff
-const getCaloriesString = code.split("function getCaloriesFromInputs")[1];
-assert.match(getCaloriesString, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*(const|let)\s+currVal\s*=\s*list\[i\]\.value/g);
+assert.match(code, /const\s+currVal\s*=\s*item\.value/);
 ```
 
 # --seed--
@@ -164,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,15 +224,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
+  --fcc-editable-region--
+  for (const item of list) {
 
   }
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
index 704027d9529..ea067911887 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
@@ -9,26 +9,26 @@ dashedName: step-58
 
 Ricordi che prima hai scritto una funzione per svuotare gli input dell'utente? Dovrai utilizzare quella funzione qui.
 
-Aggiorna la dichiarazione di `currVal` in modo che sia il risultato della chiamata di `cleanInputString` con `list[i].value`.
+Update your `currVal` declaration to be the result of calling `cleanInputString` with `item.value`.
 
 # --hints--
 
-La funzione `getCaloriesFromInputs` dovrebbe chiamare la funzione `cleanInputString`.
+You should call the `cleanInputString` function inside the `getCaloriesFromInputs` function.
 
 ```js
 assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(/);
 ```
 
-You should pass `list[i].value` as the argument for `cleanInputString`.
+You should pass `item.value` as the argument for `cleanInputString` function.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 Dovresti assegnare il risultato della chiamata di `cleanInputString` alla variabile `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(code, /const\s+currVal\s*=\s*cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -238,15 +231,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = list[i].value;
+  for (const item of list) {
+    --fcc-editable-region--
+    const currVal = item.value;
+    --fcc-editable-region--
   }
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
index c4826a8b9b5..2c7761202ff 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -239,8 +232,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
 
   }
 }
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
index 35126c8b7bb..14581c87020 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,8 +244,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
index 55f2da9a7c3..23b685db9f2 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
@@ -23,13 +23,13 @@ Dovresti usare un template literal per passare il messaggio `Invalid Input:` all
 
 ```js
 // because it transforms template literals...
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: /);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: /);
 ```
 
-Dovresti usare la sintassi di un template literal per visualizzare il primo valore nell'array `invalidInputMatch` dopo il testo `Invalid Input:`.
+You should display the first element of the `invalidInputMatch` array after the `Invalid Input:` text by using a template literal.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\)/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\)/);
 ```
 
 # --seed--
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
index 0e284b4d290..5a72639584c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
@@ -7,6 +7,8 @@ dashedName: step-62
 
 # --description--
 
+In programming, `null` is meant to represent the absence of a value. In this case, if the user enters an invalid input, you want to alert them and then return `null` to indicate that the function has failed.
+
 Sempre all'interno del blocco `if` imposta `isError` su `true` e restituisci `null`.
 
 # --hints--
@@ -14,13 +16,13 @@ Sempre all'interno del blocco `if` imposta `isError` su `true` e restituisci `nu
 Dopo `alert`, dovresti impostare `isError` su `true`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true/);
 ```
 
 Dopo aver modificato `isError`, dovresti usare `return` per restituire il valore `null`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
 ```
 
 # --seed--
@@ -142,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -233,8 +228,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
index 7cbe0eced18..d1e188b0cea 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
@@ -17,6 +17,7 @@ Here is an example:
 
 ```js
 Number('10'); // returns the number 10
+Number('abc'); // returns NaN
 ```
 
 # --hints--
@@ -164,19 +165,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +249,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
index f37b2c24dcc..f3510abfc0d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
@@ -17,12 +17,6 @@ Dovresti usare `return` per restituire il valore di `calories`.
 assert.match(getCaloriesFromInputs.toString(), /return\s+calories/);
 ```
 
-La nuova istruzione `return` dovrebbe trovarsi dopo il loop `for`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /calories\s*\+=\sNumber\(currVal\);\n\s*}\n\s*return\s+calories/)
-```
-
 # --seed--
 
 ## --seed-contents--
@@ -142,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -229,12 +216,11 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -244,9 +230,10 @@ function getCaloriesFromInputs(list) {
     }
     calories += Number(currVal);
   }
+  --fcc-editable-region--
 
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
index 8e067b90f99..cf7d4302e0f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
@@ -26,7 +26,7 @@ assert.isFunction(calculateCalories);
 La funzione `calculateCalories` dovrebbe prendere un argomento `e`.
 
 ```js
-assert.match(calculateCalories?.toString(), /\(e\)/);
+assert.match(calculateCalories?.toString(), /\(\s*e\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
index 9ec3f34f417..20055d92525 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
@@ -16,7 +16,7 @@ Aggiungi una riga alla funzione `calculateCalories` che chiama il metodo `preven
 La funzione `calculateCalories` dovrebbe chiamare `e.preventDefault()`.
 
 ```js
-assert.match(calculateCalories.toString(), /e\.preventDefault\(\)/);
+assert.match(calculateCalories.toString(), /e\.preventDefault\(\s*\)/);
 ```
 
 La funzione `calculateCalories` dovrebbe reimpostare il flag di errore globale su `false`.
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -240,8 +233,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
index 4a8b702a1c0..91f3b674e45 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
@@ -22,13 +22,13 @@ assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=/);
 Dovresti chiamare `document.querySelectorAll()` con `#breakfast input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 Dovresti assegnare il risultato della chiamata di `document.querySelectorAll()` a `breakfastNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -249,8 +242,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
index e54a8a2af2b..dd831c40a13 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=/);
 Dovresti chiamare `document.querySelectorAll()` con `#lunch input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Dovresti assegnare il risultato della chiamata di `document.querySelectorAll()` a `lunchNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -248,8 +241,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
index a75d290658b..6084c927894 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=/);
 Dovresti chiamare `document.querySelectorAll()` con `#dinner input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Dovresti assegnare il risultato della chiamata di `document.querySelectorAll()` a `dinnerNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Dovresti dichiarare una variabile `snacksNumberInputs`.
@@ -38,13 +38,13 @@ assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=/);
 Dovresti chiamare `document.querySelectorAll()` con `#snacks input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Dovresti assegnare il risultato della chiamata di `document.querySelectorAll()` a `snacksNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Dovresti dichiarare una variabile `exerciseNumberInputs`.
@@ -56,13 +56,13 @@ assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=/);
 Dovresti chiamare `document.querySelectorAll()` con `#exercise input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Dovresti assegnare il risultato della chiamata di `document.querySelectorAll()` a `exerciseNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -285,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
index 5348fb51a95..974f8e90c3e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +248,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
index cd65b8dbe1d..6620e6019c0 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -254,8 +247,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
index 9aca585cf10..13aeff99f6c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -291,8 +284,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
index d41e56eb48f..a84093a2050 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -262,8 +255,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
index 868d264fc3d..cbfc5e94f62 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -260,8 +253,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
index 23146112a3f..6eec540a46e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -270,8 +263,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
index 0e9ae73eb14..f7471b1ddd3 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -265,8 +258,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
index 072172b31ed..892c1d05a99 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
@@ -162,19 +162,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +273,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
index e214af8e605..0dbfb2a7585 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
@@ -7,7 +7,7 @@ dashedName: step-78
 
 # --description--
 
-Devi costruire la stringa HTML che verrà visualizzata nell'elemento `output`. Inizia assegnando un template literal vuoto alla proprietà `innerHTML` dell'elemento `output`.
+Devi costruire la stringa HTML che verrà visualizzata nell'elemento `output`. Start by assigning an empty template literal to the `innerHTML` property of the `output` element on a new line at the end of the function.
 
 # --hints--
 
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -263,8 +256,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
index a878b784d67..79f7fecfc8f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
@@ -7,9 +7,16 @@ dashedName: step-79
 
 # --description--
 
-La stringa `output.innerHTML` avrà bisogno di un elemento `span`. Crealo e dagli un attributo `class` impostato sulla variabile `surplusOrDeficit`, ma in minuscolo.
+When you need to lower case a string, you can use the <dfn>toLowerCase()</dfn> method. This method returns the calling string value converted to lower case.
 
-Le stringhe hanno un metodo `.toLowerCase()` che può aiutarti in questo. Non dare ancora allo `span` alcun testo.
+```js
+const firstName = 'JESSICA';
+console.log(firstName.toLowerCase()); // Output: jessica
+```
+
+La stringa `output.innerHTML` avrà bisogno di un elemento `span`. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable. Your `surplusOrDeficit` variable should be converted to lower case using the `toLowerCase()` method.
+
+Non dare ancora allo `span` alcun testo.
 
 # --hints--
 
@@ -160,19 +167,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -279,8 +279,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
index 867d825d8cf..2b9c041f59b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -258,8 +251,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
index 897abd89605..1712055840a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
@@ -9,7 +9,14 @@ dashedName: step-81
 
 Quando l'utente ha un deficit calorico, il valore di `remainingCalories` sarà negativo. Non vuoi mostrare un numero negativo nella stringa risultante.
 
-`Math.abs()` è un metodo integrato di JavaScript che restituisce il valore assoluto di un numero. Nel testo dello `span` racchiudi il riferimento a `remainingCalories` in `Math.abs()` per assicurarti che il valore sia positivo.
+`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number.
+
+```js
+const num = -5;
+Math.abs(num); // 5
+```
+
+Nel testo dello `span` racchiudi il riferimento a `remainingCalories` in `Math.abs()` per assicurarti che il valore sia positivo.
 
 # --hints--
 
@@ -24,7 +31,7 @@ Lo `span` dovrebbe avere il testo `${Math.abs(remainingCalories)} Calorie ${surp
 
 ```js
 const htmlString = code.split(/output\s*\.\s*innerHTML\s*=\s*/)[1].split(/`/)[1];
-assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(remainingCalories\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
+assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(\s*remainingCalories\s*\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
 ```
 
 # --seed--
@@ -146,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -267,8 +267,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
index 9522897db87..19d8e8a05fe 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
index 50c3e158935..5d0da605c06 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -283,8 +276,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
index f626c7d6f1b..231103def21 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
@@ -158,19 +158,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -282,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
index c8f0ab3f040..1beb0be6000 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
@@ -9,6 +9,11 @@ dashedName: step-85
 
 Infine, devi rendere visibile l'elemento `#output` in modo che l'utente possa vederne il testo. La variabile `output` è un elemento, che ha una proprietà `classList`. Questa proprietà ha un metodo `.remove()`, che accetta una stringa che rappresenta la classe da rimuovere dall'elemento.
 
+```js
+const paragraphElement = document.getElementById('paragraph');
+paragraphElement.classList.remove('hide');
+```
+
 Usa il metodo `.remove()` della proprietà `classList` della variabile `output` per rimuovere la classe `hide`. Non dimenticare di posizionare la parola `hide` tra virgolette.
 
 # --hints--
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -277,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
index 49a0a7b0a5d..af328978fb5 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
index 0fa7b5f6657..cd042a56885 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
index d59bd2bf50f..edc40c06e40 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
index 561368467c0..8b1112c649a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
@@ -9,6 +9,22 @@ dashedName: step-89
 
 Ricorda che `document.querySelectorAll` restituisce un `NodeList`, che è simile a un array ma non è un array. Tuttavia, l'oggetto `Array` ha un metodo `.from()` che accetta un array-like e restituisce un array. È utile quando vuoi accedere a metodi di array più robusti, che imparerai in un progetto futuro.
 
+The following example takes a `NodeList` of `li` elements and converts it to an array of `li` elements:
+
+```html
+<ul>
+  <li>List 1</li>
+  <li>List 2</li>
+  <li>List 3</li>
+</ul>
+```
+
+```js
+const listItemsArray = Array.from(document.querySelectorAll('li'));
+
+console.log(listItemsArray); //Output: (3) [li, li, li]
+```
+
 Racchiudi il selettore `inputContainers` in `Array.from()`. Fallo sulla stessa riga della dichiarazione.
 
 # --hints--
@@ -144,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -269,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
index d8a6582413c..3c7328bed21 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
@@ -7,33 +7,25 @@ dashedName: step-90
 
 # --description--
 
-È giunto il momento di un altro loop. Usa un loop `for` per iterare sulll'array `inputContainers`.
+È giunto il momento di un altro loop. Create a `for...of` loop with a variable called `container` to iterate through the `inputContainers` array.
 
-All'interno del loop, imposta la proprietà `innerHTML` dell'elemento all'indice corrente su una stringa vuota. Cancellerà tutti i contenuti di quel contenitore di input.
+Inside the loop, set the `innerHTML` property of the `container` to an empty string. Cancellerà tutti i contenuti di quel contenitore di input.
 
 # --hints--
 
-La funzione `clearForm` dovrebbe avere un loop `for`.
+Your `for...of` loop should iterate through the `inputContainers` array. The loop's variable name should be `container`.
 
 ```js
-// loop protect injects stuff, so let's look at the raw code again
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(/);
+assert.match(clearForm, /for\s*\(\s*const\s+container\s+of\s+inputContainers\s*\)/);
 ```
 
-Il loop `for` dovrebbe iterare sull'array `inputContainers`. Ricorda di usare `i` come iteratore.
+Your `for...of` loop should set the `innerHTML` property of `container` to an empty string.
 
 ```js
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*inputContainers\.length\s*;\s*i\s*\+\+\s*\)/);
-```
-
-Il loop `for` dovrebbe impostare la proprietà `innerHTML` di `inputContainers[i]` su una stringa vuota.
-
-```js
-const clearForm = code.split("function clearForm()")[1];
-const forLoop = clearForm.split("for")[1];
-assert.match(forLoop, /inputContainers\[\s*i\s*\]\s*\.innerHTML\s*=\s*(`|'|")\1\s*/);
+const forOfLoop = clearForm.split("for")[1];
+assert.match(forOfLoop, /container\s*\.\s*innerHTML\s*=\s*(`|'|")\1\s*/);
 ```
 
 # --seed--
@@ -155,19 +147,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +265,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
index 6fe9ec52dac..0d78b350ccd 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
index 34040a10262..0cc01b70557 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
index 8d8434b753d..2d6684eed21 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
index a1d2c212222..5962f02c884 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -292,8 +285,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
@@ -425,19 +418,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -550,8 +536,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -567,8 +553,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
index 26248317751..7d87682ac6f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
@@ -16,13 +16,13 @@ Nella funzione `createLabel`, dichiara una variabile `label` e assegnale un nuov
 Dovresti dichiarare una variabile `label` nella funzione `createLabel`.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*(?:const|let|var)\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*(?:const|let|var)\s+label/);
 ```
 
 La variabile `label` dovrebbe essere dichiarata con `const`.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*const\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*const\s+label/);
 ```
 
 Dovresti usare il metodo `.createElement()` dell'oggetto `document`.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
index e30b93fe070..5fa7068a7b6 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
@@ -22,7 +22,7 @@ assert.match(code, /letters\.forEach\(/);
 Dovresti passare al metodo `.forEach()` il riferimento alla funzione `createLabel`.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*createLabel\s*\)/);
+assert.match(code, /letters\.forEach\(\s*(?:\(\s*([\S]*)\s*\)|\s*([\S]*))\s*=>\s*createLabel\(\s*\1\2\s*\)\s*\)|letters\.forEach\(\s*createLabel\s*\)/);
 ```
 
 Non dovresti passare una chiamata della funzione `createLabel`.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
index 9ee27160bd6..6c131e75665 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-Nella tua callback, chiama `createLabel()` e passa `number` come argomento. Dovresti vedere alcuni numeri apparire nel foglio di calcolo.
+In your callback, you will need to make two function calls. Start by calling `createLabel()` and pass `number` as the argument. Dovresti vedere alcuni numeri apparire nel foglio di calcolo.
 
 Quindi chiama il metodo `.forEach()` sull'array `letters`. Pass an empty callback function which takes a `letter` parameter.
 
@@ -46,7 +46,13 @@ assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{/)
 La funzione callback dovrebbe essere vuota.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{\s*\}/)
+assert.match(code, /letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}/)
+```
+
+Your `letters.forEach()` callback function should be nested inside the `range(1, 99).forEach(number => {}` callback function.
+
+```js
+assert.match(code, /range\s*\(\s*1\s*,\s*99\s*\)\s*.forEach\s*\(\s*(\(\s*number\s*\)|number)\s*=>\s*\{\s*[^}]*letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}\s*\)\s*\}\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
index 1344a358cd2..ff8e80b168e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
@@ -9,8 +9,6 @@ dashedName: step-17
 
 Ora nella chiamata `.forEach()` annidata, dichiara una variabile `input`. Usa il metodo `.createElement()` dell'oggetto `document` per creare un elemento `input`. Imposta l'attributo `type` su `text` e l'attributo `id` su `letter + number`.
 
-Per l'accessibilità, imposta l'attributo `aria-label` sullo stesso valore dell'attributo `id`.
-
 # --hints--
 
 Dovresti dichiarare una variabile `input`.
@@ -67,18 +65,6 @@ Dovresti impostare l'attributo `id` dell'elemento `input` su `letter + number`.
 assert.match(code, /input\.id\s*=\s*letter\s\+\snumber/)
 ```
 
-Dovresti accedere alla proprietà `ariaLabel` dell'elemento `input`.
-
-```js
-assert.match(code, /input\.ariaLabel/);
-```
-
-Dovresti impostare l'attributo `aria-label` dell'elemento `input` su `letter + number`.
-
-```js
-assert.match(code, /input\.ariaLabel\s*=\s*letter\s\+\snumber/)
-```
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
index 043cf7f1d7c..17a32a475e0 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
@@ -1,8 +1,8 @@
 ---
 id: 643498328cb52026123e2b91
-title: Step 18
+title: Step 19
 challengeType: 0
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
index f52428ccf3d..80df6138971 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
@@ -1,8 +1,8 @@
 ---
 id: 643498755d54c6279ba09078
-title: Step 19
+title: Step 20
 challengeType: 0
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
index 386a1dc7079..e12c48dd744 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
@@ -1,8 +1,8 @@
 ---
 id: 6437124c4c03dd4c8fb35d56
-title: Step 20
+title: Step 21
 challengeType: 0
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
index d3d9a11efc7..cf1cb59a9e4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
@@ -1,8 +1,8 @@
 ---
 id: 6437133052eaf04d7300e622
-title: Step 21
+title: Step 22
 challengeType: 0
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
index b452e711c0e..b9bbfce2e0d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
@@ -1,8 +1,8 @@
 ---
 id: 643715013330824ecaa70442
-title: Step 22
+title: Step 23
 challengeType: 0
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
index 1d11d742d8d..5465dac989a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d1e5af8c0148fbef96d
-title: Step 23
+title: Step 24
 challengeType: 0
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
index 3079e36f15d..30145b7f48d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d80bc174a158c973080
-title: Step 24
+title: Step 25
 challengeType: 0
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
@@ -50,19 +50,19 @@ assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*n
 Il primo elemento dell'array passato a `average()` dovrebbe essere l'elemento all'indice `middle` dell'array `sorted`.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]/);
 ```
 
 Il primo elemento dell'array passato a `average()` dovrebbe essere l'elemento all'indice `middle + 1` dell'array `sorted`.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\)/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)/);
 ```
 
 Se il ternario è falsy, dovresti restituire il valore di `sorted` all'indice `middle`. Usa `Math.ceil()` per arrotondare per eccesso il valore `middle`.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\[\s*Math\.ceil\(\s*middle\s*\)\s*\];?/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\s*\[\s*Math\.ceil\(\s*middle\s*\)\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
index 219b5138404..4c5dfb40dae 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
@@ -1,8 +1,8 @@
 ---
 id: 64496df724dd3716a71fe971
-title: Step 25
+title: Step 26
 challengeType: 0
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
index 4743bf69400..5fae58c8ac9 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
@@ -1,8 +1,8 @@
 ---
 id: 64496e9c6d7a2e189948e441
-title: Step 26
+title: Step 27
 challengeType: 0
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
index 365f712e0f6..880f0738c10 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
@@ -1,8 +1,8 @@
 ---
 id: 6449749d20436c1f1dfadcf2
-title: Step 27
+title: Step 28
 challengeType: 0
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
index ab2852abecf..87d7ab97f71 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
@@ -1,8 +1,8 @@
 ---
 id: 6449755666005520330cec5b
-title: Step 28
+title: Step 29
 challengeType: 0
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
index 35c2e9edac4..decb1c0b377 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
@@ -1,8 +1,8 @@
 ---
 id: 64497da4062602213ecf32e7
-title: Step 29
+title: Step 30
 challengeType: 0
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
index 6de5ce333b9..a0697c988ef 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
@@ -1,8 +1,8 @@
 ---
 id: 64497de936a2f322327e5c58
-title: Step 30
+title: Step 31
 challengeType: 0
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
index 9d71f5d383b..3c053c0e03c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e0e5e5a2c2329785af4
-title: Step 31
+title: Step 32
 challengeType: 0
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
@@ -16,7 +16,7 @@ Use the `&&` operator to add a second condition to your `if` statement that also
 You should use the `&&` operator to add a second condition to your `if` statement that also checks if the first character of `value` is `=`. Puoi usare `[0]`, `.startsWith()` o `.charAt(0)`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
index bb3b8c070f0..7737634f0ca 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e764135bd24b7960dd3
-title: Step 32
+title: Step 33
 challengeType: 0
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
index ca72152902f..c705dd107d8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
@@ -1,8 +1,8 @@
 ---
 id: 6449842c6f6c84261075e4c9
-title: Step 33
+title: Step 34
 challengeType: 0
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
index 39e46bf2a9e..a73d70686e3 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
@@ -1,8 +1,8 @@
 ---
 id: 64498473a17adc26ef0ecc2d
-title: Step 34
+title: Step 35
 challengeType: 0
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
index 4b26a99a8a2..62fa8adee86 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
@@ -1,8 +1,8 @@
 ---
 id: 6449849b78f43527be1e8a98
-title: Step 35
+title: Step 36
 challengeType: 0
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
index b7db9764616..3bc629113a5 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
@@ -1,8 +1,8 @@
 ---
 id: 64498542cab69128ab24e4de
-title: Step 36
+title: Step 37
 challengeType: 0
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
index 1ef3629ee7a..25775ff0f6f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
@@ -1,8 +1,8 @@
 ---
 id: 6449860d84c9e22cbd7b497c
-title: Step 37
+title: Step 38
 challengeType: 0
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
index 51251c02679..aef582f8846 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
@@ -1,8 +1,8 @@
 ---
 id: 6449863f592af72d9be0959e
-title: Step 38
+title: Step 39
 challengeType: 0
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
index bfd7b154e67..097553ccb3b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
@@ -1,8 +1,8 @@
 ---
 id: 6449874d5191562eb3313b3f
-title: Step 39
+title: Step 40
 challengeType: 0
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
index 9314d009cef..312d83db1d7 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
@@ -1,8 +1,8 @@
 ---
 id: 6449876e7aae0d2f8257a497
-title: Step 40
+title: Step 41
 challengeType: 0
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
index f0b03f06cef..9f716da37fb 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
@@ -1,8 +1,8 @@
 ---
 id: 64498b085028fc30a58bb6a7
-title: Step 41
+title: Step 42
 challengeType: 0
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
index 5c3e72310bd..bcdb9fdfe15 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0889c6ff4baa46ac1c50
-title: Step 42
+title: Step 43
 challengeType: 0
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
index bd70e6a81b9..f976c5459c8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
@@ -1,8 +1,8 @@
 ---
 id: 646d09a07241aaab1e777080
-title: Step 43
+title: Step 44
 challengeType: 0
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
index 9eb707970ee..3ee66d3ed30 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0a022da7bcabf3e3aca3
-title: Step 44
+title: Step 45
 challengeType: 0
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
index 1c6cf2fc69a..7e38c3a67d8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0d20108440acc95a6b32
-title: Step 45
+title: Step 46
 challengeType: 0
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
index ecddee86863..f360898f1a4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0db5175974ad8633b71c
-title: Step 46
+title: Step 47
 challengeType: 0
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
index 7fadb279a8d..222bb919471 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0e4636e14eae2bb3b992
-title: Step 47
+title: Step 48
 challengeType: 0
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
index 53bfb9c4b27..cb482c6425e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1980018efaaec2b1c28b
-title: Step 48
+title: Step 49
 challengeType: 0
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
index 03c4b7c39de..b71e9710e2a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
@@ -1,8 +1,8 @@
 ---
 id: 646d19fc4705e4af65c3e688
-title: Step 49
+title: Step 50
 challengeType: 0
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
index 8dd4927f273..f48c4f75ac2 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1b96dd7ea4b0061458bc
-title: Step 50
+title: Step 51
 challengeType: 0
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
index 66d5e368cdf..cd6d1d3aa65 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
@@ -1,13 +1,13 @@
 ---
 id: 646d1cadf0d96ab0b7e12da4
-title: Step 51
+title: Step 52
 challengeType: 0
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
 
-Poiché `elemValue` restituisce una funzione, la funzione `addChars` alla fine restituisce un array di riferimenti di funzione. Vuoi che il metodo `.map()` esegua la funzione interna della funzione `elemValue`, il che significa che devi chiamare `elemValue` invece di farvi riferimento. Passa `num` come argomento alla funzione `elemValue`.
+Because `elemValue` returns a function, your `addCharacters` function ultimately returns an array of function references. Vuoi che il metodo `.map()` esegua la funzione interna della funzione `elemValue`, il che significa che devi chiamare `elemValue` invece di farvi riferimento. Passa `num` come argomento alla funzione `elemValue`.
 
 <!-- TODO: Explain further? -->
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
index 55ff9451d4d..09423c05fef 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1d67f9261fb15a795588
-title: Step 52
+title: Step 53
 challengeType: 0
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
index e03d5f85ae9..b2c2c4a81e5 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1e531042dfb24da1f032
-title: Step 53
+title: Step 54
 challengeType: 0
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
@@ -16,13 +16,13 @@ La funzione callback prende alcuni parametri. Il primo è la stringa che dà ris
 Dovresti passare una funzione freccia come secondo argomento al metodo `.replace()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 La funzione freccia dovrebbe prendere un parametro `match`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
index cf4e06d80cc..99979e14fb6 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3141790b3cb337dd611a
-title: Step 54
+title: Step 55
 challengeType: 0
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
index f7a3bab0a6a..ec673af68e7 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
@@ -1,8 +1,8 @@
 ---
 id: 646d382c4d70ceb3dba1e830
-title: Step 55
+title: Step 56
 challengeType: 0
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
index bba213079e4..6b1b486cb59 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
@@ -1,8 +1,8 @@
 ---
 id: 646d386a685620b49db4be76
-title: Step 56
+title: Step 57
 challengeType: 0
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
index 4856f13efc6..9c0bc8da2a2 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38c326f3c8b54023de38
-title: Step 57
+title: Step 58
 challengeType: 0
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
index 83354eedfbc..f3b5b1c490e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38f906b94cb5fe6ce7de
-title: Step 58
+title: Step 59
 challengeType: 0
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
index 537ccfef8cb..9d307683c3c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3952f6af37b6a1c241c2
-title: Step 59
+title: Step 60
 challengeType: 0
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
index fed0bae34d4..6ce593667e1 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
@@ -1,8 +1,8 @@
 ---
 id: 646d39c156fe94b7482c3ab6
-title: Step 60
+title: Step 61
 challengeType: 0
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
index 1ff5dd92f8f..9dc2f5ebc53 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3b27cd3c56b875256301
-title: Step 61
+title: Step 62
 challengeType: 0
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
index fc67bf17c86..3ee529ac698 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3bc75fe0c9b972da3323
-title: Step 62
+title: Step 63
 challengeType: 0
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
index 42c9f16eac8..62b0d58fff4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3c146e10b0ba222bb2a7
-title: Step 63
+title: Step 64
 challengeType: 0
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
index d05441296d7..b1ce91b4b94 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d037872fbbae0a8ec0e
-title: Step 64
+title: Step 65
 challengeType: 0
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
index 754a9a59284..10fa032664c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d65be79c8bb9c7df9ff
-title: Step 65
+title: Step 66
 challengeType: 0
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
index 7b2411fc6dc..6ed45328d42 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d80c3b4aebc4103618e
-title: Step 66
+title: Step 67
 challengeType: 0
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
index b9c37ebd3e1..8f496ac3b81 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3da8501e15bcd355ba1d
-title: Step 67
+title: Step 68
 challengeType: 0
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
index ff878151356..2356e88bee1 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e135ab3abbdbfe5c899
-title: Step 68
+title: Step 69
 challengeType: 0
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
index dab09cbdb04..f54e350422c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e64b15f92be6e61704e
-title: Step 69
+title: Step 70
 challengeType: 0
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str
 Your callback function should use bracket notation to access the property of the `infixToFunction` object that matches the value of the `operator` parameter.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
index 7a1abf11509..3cf9e2a3003 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3ee7b17ae3bf48610033
-title: Step 70
+title: Step 71
 challengeType: 0
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
@@ -14,19 +14,19 @@ dashedName: step-70
 La funzione callback dovrebbe restituire il risultato della chiamata di `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(/);
 ```
 
 Dovresti passare `arg1` come primo argomento alla chiamata di `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1/);
 ```
 
 Dovresti passare `arg2` come secondo argomento alla chiamata di `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
index 760c2459934..63b300eae0e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f1fd12f76c02c823bb8
-title: Step 71
+title: Step 72
 challengeType: 0
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
@@ -16,13 +16,13 @@ Racchiudi ogni argomento di `infixToFunction[operator]` in una chiamata `parseFl
 Dovresti inserire `arg1` in una chiamata `parseFloat()`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
 ```
 
 Dovresti inserire `arg2` in una chiamata `parseFloat()`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
index 1cc0258a61f..169cd32dc57 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f718b5f8dc102cd528e
-title: Step 72
+title: Step 73
 challengeType: 0
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
index 4c686113d24..afb7eda45d7 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
@@ -1,8 +1,8 @@
 ---
 id: 646d404259f512c1a9e86ac1
-title: Step 73
+title: Step 74
 challengeType: 0
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
index b4b09bfc491..ada53f44bb0 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40c543943ec250039682
-title: Step 74
+title: Step 75
 challengeType: 0
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
index 85f7823ad27..a6ba7e55aa2 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40fe4b7b50c30c2b4cd8
-title: Step 75
+title: Step 76
 challengeType: 0
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
index 7a3d730131e..eedaa60b64c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
@@ -1,8 +1,8 @@
 ---
 id: 646d41e23b583fc3b8cc4579
-title: Step 76
+title: Step 77
 challengeType: 0
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
index 34b31725c53..67a8dcd1f76 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
@@ -1,8 +1,8 @@
 ---
 id: 646d423fade4a9c4636acd13
-title: Step 77
+title: Step 78
 challengeType: 0
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
index 87e8867f0ef..5920f714443 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
@@ -1,8 +1,8 @@
 ---
 id: 646d42f58deb2fc52adc6611
-title: Step 78
+title: Step 79
 challengeType: 0
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
index 23e125b23f4..4dc57c48997 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d43587d926bc5b6cb2e50
-title: Step 79
+title: Step 80
 challengeType: 0
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
index e5a93bcdd63..ba712480146 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d448479c8fdc8dcec868c
-title: Step 80
+title: Step 81
 challengeType: 0
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
index dc5da176cb9..171ef8e05f9 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d44da986f2bc9b72f5fe2
-title: Step 81
+title: Step 82
 challengeType: 0
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
index 63cb370b460..3ae512bdb0d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
@@ -1,8 +1,8 @@
 ---
 id: 646d451c2e44afca71b67818
-title: Step 82
+title: Step 83
 challengeType: 0
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
index a35c5bea2cd..04f3f69d7fd 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4554721d43cb19a68bc4
-title: Step 83
+title: Step 84
 challengeType: 0
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
@@ -28,13 +28,13 @@ assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*cons
 La funzione `apply` dovrebbe accedere alla proprietà dell'oggetto `spreadsheetFunctions` che corrisponde al valore di `fn`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn/);
 ```
 
 La funzione `apply` dovrebbe chiamare il metodo `.toLowerCase()` su `fn` accedendo alla proprietà.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]/);
 ```
 
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
index fc87513c741..f263967decd 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45b739da5ecbf830c108
-title: Step 84
+title: Step 85
 challengeType: 0
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
@@ -14,19 +14,19 @@ La funzione `apply` sta restituendo la funzione del foglio di calcolo, ma non la
 La funzione `apply` dovrebbe chiamare la funzione `spreadsheetFunctions[fn.toLowerCase()]`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(/);
 ```
 
 Dovresti passare una chiamata `toNumberList()` alla chiamata `spreadsheetFunctions[fn.toLowerCase()]`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(/);
 ```
 
 Dovresti passare `args` alla chiamata `toNumberList()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
index 52bfab4333e..140e83b37f7 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45ee725632cca2555146
-title: Step 85
+title: Step 86
 challengeType: 0
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Ora `applyFunction` deve restituire un risultato. Restituisci il risultato della
 La funzione `applyFunction` dovrebbe restituire il risultato della chiamata del metodo `.replace()` su `str2`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(/);
 ```
 
 Dovresti passare `functionCall` come primo argomento alla chiamata `.replace()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall/);
 ```
 
 Dovresti passare una funzione freccia vuota come secondo argomento alla chiamata `.replace()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
 ```
 
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
index 64abae6df30..100909a4e2e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4626420eeecd51f241c2
-title: Step 86
+title: Step 87
 challengeType: 0
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Ricordati di rendere `fn` in minuscolo.
 La funzione callback dovrebbe avere `match` come primo parametro.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
 ```
 
 La funzione callback dovrebbe avere `fn` come secondo parametro.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
 ```
 
 La funzione callback dovrebbe avere `args` come terzo parametro.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
 ```
 
 La funzione callback dovrebbe utilizzare un return implicito.
 
 ```js
-assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
+assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
 ```
 
 La funzione callback dovrebbe restituire il risultato della chiamata del metodo `.hasOwnProperty()` sull'oggetto `spreadsheetFunctions`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
 ```
 
 Dovresti passare `fn` al metodo `hasOwnProperty()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn/);
 ```
 
 Dovresti chiamare il metodo `.toLowerCase()` su `fn`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
index 3c8db8da835..267b28659e7 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d467c6994f4ce0dc416a4
-title: Step 87
+title: Step 88
 challengeType: 0
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
@@ -14,31 +14,31 @@ Usa l'operatore ternario per trasformare la chiamata `.hasOwnProperty()` nella c
 La funzione callback dovrebbe usare la sintassi ternaria.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
 ```
 
 Se la condizione ternaria è vera, la funzione callback dovrebbe restituire il risultato della chiamata `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\s*\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\s*\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
 ```
 
 Dovresti passare `fn` come primo argomento alla chiamata `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
 ```
 
 Dovresti passare `args` come secondo argomento alla chiamata `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
 ```
 
 Se il ternario è falso, dovresti restituire `match`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
index 57f4391215f..ec33ca78656 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
@@ -1,8 +1,8 @@
 ---
 id: 646d46c03e7d02cecb30f021
-title: Step 88
+title: Step 89
 challengeType: 0
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
@@ -14,25 +14,25 @@ Ora puoi iniziare ad applicare la funzione parser alla logica di `evalFormula`.
 Dovresti dichiarare una variabile `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
 ```
 
 Dovresti usare `const` per dichiarare la variabile `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*const\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*const\s+functionExpanded\s*=\s*/);
 ```
 
 Dovresti assegnare alla variabile `functionExpanded` il risultato della chiamata della funzione `applyFunction`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
 ```
 
 Dovresti passare `cellExpanded` alla chiamata di `applyFunction`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
index 5bc338357bb..7702b57b2da 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4717a689e1cfa232e357
-title: Step 89
+title: Step 90
 challengeType: 0
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Usa un ternario per controllare se `functionExpanded` è uguale alla stringa ori
 La funzione `evalFormula` dovrebbe utilizzare la parola chiave `return`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
 ```
 
 L'istruzione `return` dovrebbe controllare se `functionExpanded` è uguale a `x`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
 ```
 
 L'istruzione `return` dovrebbe utilizzare un operatore ternario.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
 ```
 
 Se la condizione ternaria è vera, `evalFormula()` dovrebbe restituire `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
 ```
 
 Se la condizione ternaria è falsa, `evalFormula()` dovrebbe restituire il risultato della chiamata `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
 ```
 
 Dovresti passare `functionExpanded` come primo argomento alla chiamata `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
 ```
 
 Dovresti passare `cells` come secondo argomento alla chiamata `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
index 2b64f8064e9..5ddbbed65e3 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4769ba65f1d05ef6b634
-title: Step 90
+title: Step 91
 challengeType: 0
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
@@ -16,19 +16,19 @@ All'interno dell'istruzione `if`, imposta il `value` di `element` come risultato
 Dovresti aggiornare la proprietà `value` di `element` nel blocco `if`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
 ```
 
 Dovresti assegnare alla proprietà `value` il risultato della chiamata della funzione `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
 ```
 
 Non dovresti passare alcun argomento alla chiamata `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
index b31eea3b10b..3cb97ab3d0f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
@@ -1,8 +1,8 @@
 ---
 id: 646d47c8f58107d10f1e5106
-title: Step 91
+title: Step 92
 challengeType: 0
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Il primo argomento della chiamata di `evalFormula` deve essere il contenuto dell
 Dovresti passare `value` come primo argomento alla chiamata `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
 ```
 
 Dovresti chiamare il metodo `.slice()` sull'argomento `value`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(/);
 ```
 
 Dovresti passare il numero `1` come argomento alla chiamata `.slice()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(\s*1\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
index 2a8fdb0688b..5f35c4d3a3e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4813c17b37d1e261a566
-title: Step 92
+title: Step 93
 challengeType: 0
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Puoi ottenere rapidamente tutte le celle dalla pagina ottenendo l'elemento `#con
 Per il secondo parametro della chiamata `evalFormula()` dovresti chiamare il metodo `.getElementById()` dell'oggetto `document`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
 ```
 
 Dovresti passare `container` come argomento alla chiamata `.getElementById()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
 ```
 
 Dovresti accedere alla proprietà `children` del risultato della chiamata `.getElementById()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
index abe236b4b3a..045147da7ee 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
@@ -1,8 +1,8 @@
 ---
 id: 646d486aec20f7d2a581cc36
-title: Step 93
+title: Step 94
 challengeType: 0
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
@@ -14,7 +14,7 @@ Purtroppo, quella proprietà `children` sta restituendo una serie di elementi, c
 Dovresti inserire `document.getElementById('container').children` in `Array.from()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
index 99ec2be488f..25562db63d4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
@@ -1,8 +1,8 @@
 ---
 id: 646d48b936802fd34c3f05af
-title: Step 94
+title: Step 95
 challengeType: 0
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
index a6025c95531..2e6dda297ae 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d498c8ebc31d3f753b22e
-title: Step 95
+title: Step 96
 challengeType: 0
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
index 6ea40aba84e..71e34cca23b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
@@ -1,8 +1,8 @@
 ---
 id: 646d49bfff9079d4b38df115
-title: Step 96
+title: Step 97
 challengeType: 0
-dashedName: step-96
+dashedName: step-97
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
index 9842de4bb1b..156929d8d42 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a07a8fb14d55cd70e09
-title: Step 97
+title: Step 98
 challengeType: 0
-dashedName: step-97
+dashedName: step-98
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
index ea44a85803a..b35aca9a472 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a5b32a1cad6165df286
-title: Step 99
+title: Step 100
 challengeType: 0
-dashedName: step-99
+dashedName: step-100
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
index 1a6a0607270..a7bf351ed9a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a8dbc04c6d6bb0001f8
-title: Step 100
+title: Step 101
 challengeType: 0
-dashedName: step-100
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
index 92d6dae2ffc..f5d17ae4253 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4ab9b3b4c5d74fdd2154
-title: Step 101
+title: Step 102
 challengeType: 0
-dashedName: step-101
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
index 32888e0f5eb..fb6db38a8ac 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4b3d80ea98d824c8a4f9
-title: Step 102
+title: Step 103
 challengeType: 0
-dashedName: step-102
+dashedName: step-103
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
index c48afc2bbbe..404ac487b30 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
@@ -1,8 +1,8 @@
 ---
 id: 6491d38f5b09a021c4b5d5fe
-title: Step 98
+title: Step 99
 challengeType: 0
-dashedName: step-98
+dashedName: step-99
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
new file mode 100644
index 00000000000..3a606f8e1cf
--- /dev/null
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
@@ -0,0 +1,104 @@
+---
+id: 65ae458e23954c3469e0c209
+title: Step 18
+challengeType: 0
+dashedName: step-18
+---
+
+
+# --description--
+
+In earlier projects you learned about the `setAttribute` method. Another way to update an attribute in JavaScript is to use the following syntax:
+
+```js
+el.attribute = value;
+```
+
+The property names for hyphenated HTML attribute values, such as `aria-label`, follow camel case, becoming `ariaLabel`.
+
+```js
+el.ariaLabel = "Aria Label Value";
+```
+
+Set the `aria-label` attribute for the `input` element to the same value as the `id` attribute.
+
+
+# --hints--
+
+You should have an `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=/);
+```
+
+
+You should assign `letter + number` to `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=\s*letter\s*\+\s*number/);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="./styles.css" />
+    <title>Functional Programming Spreadsheet</title>
+  </head>
+  <body>
+    <div id="container">
+      <div></div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+#container {
+  display: grid;
+  grid-template-columns: 50px repeat(10, 200px);
+  grid-template-rows: repeat(11, 30px);
+}
+
+.label {
+  background-color: lightgray;
+  text-align: center;
+  vertical-align: middle;
+  line-height: 30px;
+}
+```
+
+```js
+const range = (start, end) => Array(end - start + 1).fill(start).map((element, index) => element + index);
+const charRange = (start, end) => range(start.charCodeAt(0), end.charCodeAt(0)).map(code => String.fromCharCode(code));
+
+window.onload = () => {
+  const container = document.getElementById("container");
+  const createLabel = (name) => {
+    const label = document.createElement("div");
+    label.className = "label";
+    label.textContent = name;
+    container.appendChild(label);
+  }
+  const letters = charRange("A", "J");
+  letters.forEach(createLabel);
+  range(1, 99).forEach(number => {
+     createLabel(number);
+--fcc-editable-region--
+    letters.forEach(letter => {
+     const input = document.createElement("input");
+     input.type = "text";
+     input.id = letter + number;
+
+    })   
+--fcc-editable-region--
+  })
+}
+```
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
index 3cec38aa407..0e32099a903 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
@@ -16,7 +16,7 @@ Now you should be able to roll the dice a few times and see the values update.
 You should call your `updateStats` function inside the `else` clause.
 
 ```js
-assert.match(code, /updateStats\(\)/)
+assert.match(code, /updateStats\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
index ec6710dbe86..0e8628f0753 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
@@ -28,7 +28,7 @@ assert.match(code, /const\s+updateRadioOption\s*=\s*\(.*\)\s*=>\s*{\s*[\s\S]*};?
 Your `updateRadioOption` function should take `optionNode` and `score` as parameters.
 
 ```js
-assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\)\s*=>\s*{\s*[\s\S]*};?/)
+assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\s*\)\s*=>\s*{\s*[\s\S]*};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
index 94eca0454a0..d8e5103c95e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
@@ -14,7 +14,7 @@ To enable the radio buttons, you should set the `disabled` property on `scoreInp
 You should assign `false` to `scoreInputs[optionNode].disabled`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.disabled\s*=\s*false/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.disabled\s*=\s*false/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
index 0ff7925d741..a113b4ed19d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
@@ -14,7 +14,7 @@ Next, you will need to update the radio button's `value` to the current `score`.
 You should assign the `score` variable to `scoreInputs[optionNode].value`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.value\s*=\s*score/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.value\s*=\s*score/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
index 08ef2eb327a..ce744214775 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
@@ -14,7 +14,7 @@ To display the current score, update the text content for the `span` element nex
 You should set the `textContent` property for `scoreSpans[optionNode]` to the following template literal: `, score = ${score}`.
 
 ```js
-assert.match(code, /scoreSpans\[\s*optionNode\s*\]\.textContent\s*=\s*`, score = \${score}`;?/);
+assert.match(code, /scoreSpans\s*\[\s*optionNode\s*\]\s*\.textContent\s*=\s*`, score = \${score}`;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
index 614afd85e67..0657086cd45 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
@@ -22,7 +22,7 @@ assert.match(code, /updateRadioOption\(.*\);?/);
 You should have the arguments of `0` and `10` for the `updateRadioOption` function.
 
 ```js
-assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
index 893a2a96525..d1ff45d93b8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
@@ -14,7 +14,7 @@ Now that you have verified the `updateRadioOption` function works, remove the fu
 You should remove the `updateRadioOption` function call from your `else` clause.
 
 ```js
-assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
index b870e399235..f06543d5374 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
@@ -18,19 +18,19 @@ Below your `if` statement, include an `else` clause that assigns `1` to `counts[
 You should have an `if` statement with a condition of `counts[num]`.
 
 ```js
-assert.match(code, /if\s*\(\s*counts\[num\]\s*\)/);
+assert.match(code, /if\s*\(\s*counts\s*\[\s*num\s*\]\s*\)/);
 ```
 
 You should use the `++` operator to increment the value of `counts[num]` by `1` inside your `if` statement.
 
 ```js
-assert.match(code, /counts\[num\]\s*\+\s*=\s*1|counts\[num\]\+\+/);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*\+\s*=\s*1|counts\s*\[\s*num\s*\]\s*\+\+/);
 ```
 
 You should assign `1` to `counts[num]` inside your `else` clause.
 
 ```js
-assert.match(code, /else\s*\{\s*counts\[num\]\s*=\s*1\s*;?\s*\}/);
+assert.match(code, /else\s*\{\s*counts\s*\[\s*num\s*\]\s*=\s*1\s*;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
index 594c69b99c0..aa7a673361c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
@@ -22,7 +22,7 @@ assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s
 You should assign `counts[num]` to your `count` variable.
 
 ```js
-assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\[num\]\s*;?\s*}/);
+assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\s*\[\s*num\s*\]\s*;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
index f2fca09912a..7de9930adb4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
@@ -16,7 +16,7 @@ Now, try rolling the dice again and you should see that the previous score `inpu
 You should call the `resetRadioOption` function inside the `rollDiceBtn` callback function.
 
 ```js
-assert.match(code, /resetRadioOption\(\);?/);
+assert.match(code, /resetRadioOption\(\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
index a0b029637bc..b6281278c20 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
@@ -22,7 +22,7 @@ assert.isFunction(resetGame);
 You should use arrow syntax for your `resetGame` function.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*}\s*;?/);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
index b096b04e844..b9278c7f075 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
@@ -24,25 +24,25 @@ assert.match(code, /diceValuesArr\s*=\s*\[\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s
 You should reassign the `score` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `totalScore` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `rolls` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `round` variable to `1`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
index e4be0e17fe1..65aa4696347 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
@@ -14,13 +14,13 @@ To reset each of the dice values to show `0`, apply a `forEach` method to the `l
 You should call the `forEach` method of the `listOfAllDice` variable.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
 ```
 
 For your callback function, you should use `dice` and `index` as parameters.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
index e5a344733a0..fef565d78af 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
@@ -14,13 +14,13 @@ Inside your callback function, update the `dice` text content by assigning it th
 You should access the `textContent` property of the `dice` parameter.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
 ```
 
 You should assign `diceValuesArr[index]` to `dice.textContent`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
index bfd86a902e1..a02aa74f6cc 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
@@ -20,25 +20,25 @@ Lastly, update the `currentRoundText` text content by assigning it the `round` v
 You should assign `totalScore` to `totalScoreText.textContent`.
 
 ```js
-assert.match(code, /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
+assert.match(resetGame.toString(), /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
 ```
 
 You should use the `innerHTML` property to set the `scoreHistory` to an empty string.
 
 ```js
-assert.match(code, /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
+assert.match(resetGame.toString(), /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
 ```
 
 You should assign `rolls` to `currentRoundRollsText.textContent`.
 
 ```js
-assert.match(code, /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
+assert.match(resetGame.toString(), /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
 ```
 
 You should assign `round` to `currentRoundText.textContent`.
 
 ```js
-assert.match(code, /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
+assert.match(resetGame.toString(), /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
index b88ff031b69..93c52a5711d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
@@ -16,7 +16,7 @@ Assign the entire result of your `ternary` to `counts[num]`.
 You should assign `counts[num] ? counts[num] + 1 : 1` to `counts[num]` in the `for...of` loop.
 
 ```js
-assert.match(code, /counts\[num\]\s*=\s*counts\[num\]\s*\?\s*counts\[num\]\s*\+\s*1\s*:\s*1\s*;?/s);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*=\s*counts\s*\[\s*num\s*\]\s*\?\s*counts\s*\[\s*num\s*\]\s*\+\s*1\s*:\s*1\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
index 22c916525ce..b32ef487eb2 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasThreeOfAKind\s*=/);
 You should assign `Object.values(counts)` to your `hasThreeOfAKind` variable.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(3)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\)\.includes\(3\)\s*;?/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*3\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
index 195ba652bf2..ad8809cdf97 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasPair\s*=/);
 You should assign `Object.values(counts)` to your `hasPair` variable.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(2)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\)\.includes\(2\)\s*;?/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*2\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
index f5294add55c..ac4e5d43883 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
@@ -36,7 +36,7 @@ assert.match(code, /const\s+sortedNumbersArr\s*=\s*arr\.sort\(.*\);?/);
 Your callback function should use `a` and `b` for the parameters and implicitly return `a - b`.
 
 ```js
-assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(a,\s*b\)\s*=>\s*a\s*-\s*b\s*\));?/);
+assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(\s*a,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\));?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
index bee0f5fd723..8dc77d2b8c5 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+smallStraightsArr\s*=?\s*;?/);
 You should store the strings `1234`, `2345` and `3456` in an array and assign it to your `smallStraightsArr`.
 
 ```js
-assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\];?/);
+assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
index 13e8dfc3914..178109f5af5 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+largeStraightsArr\s*=?\s*;?/);
 You should store the strings `12345` and `23456` in an array and assign it to your `largeStraightsArr`.
 
 ```js
-assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\];?/);
+assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
index d2db745f5ae..19d24cbc9cc 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `smallStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `3` and `30` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
index 7fae83cead0..1c742691b36 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `largeStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `4` and `40` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
index cae7645f18a..4bd72562aa6 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
@@ -16,7 +16,7 @@ Inside the `animate` function, create an `if` statement where the condition chec
 You should have an `if` statement that checks if the right key was pressed and the player's `x` position is less than 400.
 
 ```js
-assert.match(animate.toString(), /keys\.rightKey\.pressed\s*&&\s*player\.position\.x\s*<\s*400/);
+assert.match(animate.toString(), /keys\.rightKey\.(pressed|pressed\s*===\s*true)\s*&&\s*player\.position\.x\s*<\s*400/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
index b08537e33ef..2bc5e567f4f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
@@ -30,7 +30,7 @@ assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*
 You should call the `draw` method on each `platform`.
 
 ```js
-assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\)\s*;?\s*}?\s*\);?/);
+assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\s*\)\s*;?\s*}?\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
index 9f7587a21d9..79eda0fba07 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
@@ -26,7 +26,7 @@ Your callback function should have a `platform` parameter.
 
 ```js
 const splitter = code.split("platform.position.x += 5;")
-assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\);?/);
+assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
index 2f93bab525f..4183273e53c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
@@ -9,17 +9,17 @@ dashedName: step-78
 
 Inside the callback function, create a new `const` variable called `collisionDetectionRules` and assign it an empty array.
 
-Inside that array, add a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+Inside that array, add a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 # --hints--
 
 You should have a `const` variable called `collisionDetectionRules` that is assigned an empty array.
 
 ```js
-assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\];?/);
+assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\s*\]\s*;?/);
 ```
 
-You should have a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+You should have a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 ```js
 assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*player\.position\.y\s*\+\s*player\.height\s*<=\s*platform\.position\.y\s*,?\s*]\s*;?/);
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
index 4bde13df3b4..58abfdfbe35 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
@@ -14,7 +14,7 @@ Inside that array, add a boolean expression that checks if the player's `x` posi
 You should have a boolean expression that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
index be5c847d0e4..6f9308ec65d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
@@ -14,7 +14,7 @@ Below that boolean expression, add another boolean expression that checks if the
 You should have a boolean expression that checks if the player's `x` position is less than or equal to the sum of the platform's `x` position and the platform's width minus one third of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
index 8d05627ce2b..2affd7ae4c1 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
@@ -16,21 +16,21 @@ Below that, add another boolean expression that checks if the player's `y` posit
 You should not alter the existing `platformDetectionRules` array and its content.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position plus the player's height is greater than or equal to the platform's `y` position.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position is less than or equal to the sum of the platform's `y` position plus the platform's height.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\]\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
index 436b88a8f29..55173875215 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
@@ -19,21 +19,21 @@ Your `CheckPoint` class should have a `draw` method.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{/);
 ```
 
 Your `draw` method should have a `fillStyle` property.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
 ```
 
 Your `draw` method should have a `fillRect` method.
 
 ```js
 const splitter = code.split('#f1be32')
-assert.match(splitter[1], /ctx\.fillRect\(this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\);?/);
+assert.match(splitter[1], /ctx\.fillRect\(\s*this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
index 0f6aa833af9..ecedd30bbea 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
@@ -25,14 +25,14 @@ assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\([^
 Your callback function should have a `checkpoint` parameter.
 
 ```js
-assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*[^)]*\s*\)\s*;?/);
+assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*[^)]*\s*\)\s*;?/);
 
 ```
 
 You should implicitly return a new `CheckPoint` instance.
 
 ```js
-assert.match(code, /\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
+assert.match(code, /\s*checkpointPositions\.map\s*\(\s*(\(checkpoint\s*\)|checkpoint)\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
index 4c2b75d6d8c..35533919bb2 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
@@ -24,13 +24,13 @@ assert.match(code, /\bcheckpoints\b\s*\.\s*forEach\s*\(/s);
 You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*checkpoint\s*=>\s*{/s);
+assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*{?/s);
 ```
 
 You should call the `draw` method on each `checkpoint` inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\.forEach\s*\(\s*checkpoint\s*=>\s*{\s*checkpoint\.draw\(\s*\);?\s*}\s*\);?/s);
+assert.match(code, /\s*checkpoints\.forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*(\{\s*checkpoint\.draw\(\s*\)\s*;?\s*\}|checkpoint\.draw\(\s*\))\s*\)\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
index a470a035eb7..12050701935 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
@@ -24,7 +24,7 @@ You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
 const splitter = code.split("if (keys.rightKey.pressed && isCheckpointCollisionDetectionActive)")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(?checkpoint\)?\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*\{/);
 ```
 
 You should use the subtraction assignment operator to subtract 5 from the `checkpoint`'s `x` position.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
index 69e219ac7dd..373b02e6486 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
@@ -42,7 +42,7 @@ assert.match(code, /\s*setTimeout\s*\(\s*\(\s*\)\s*=>[^,]*,\s*2000\s*\)/s);
 Your callback function should set the `checkpointScreen` `display` property to `none`.
 
 ```js
-assert.match(code, /\s*if\s*\(isCheckpointCollisionDetectionActive\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
+assert.match(code, /\s*if\s*\(\s*isCheckpointCollisionDetectionActive\s*\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
index e9b8c28b3aa..a59debae637 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
@@ -24,7 +24,7 @@ Your callback function should have a `checkpoint` parameter and `index`.
 
 ```js
 const splitter = code.split("player.velocity.y = gravity;")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(checkpoint,\s*index\)\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*\(\s*checkpoint,\s*index\s*\)\s*=>\s*\{/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
index e22063744f2..f7bbbb1edad 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
@@ -14,7 +14,7 @@ Inside the `if` statement, call the `claim` method on the `checkpoint` object.
 You should call the `claim()` method on the `checkpoint` object.
 
 ```js
-assert.match(code, /checkpoint\.claim\(\);?/)
+assert.match(code, /checkpoint\.claim\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
index 917576aaa19..93460e80702 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
@@ -24,7 +24,7 @@ assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\
 You should call the `showCheckpointScreen` function and pass in "You reached the final checkpoint!" as an argument.
 
 ```js
-assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\);?/)
+assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(\s*("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\s*\);?/)
 ```
 
 You should call the `movePlayer` function and pass in the provided arguments.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
index 79fdb32b9c3..711e173f5d5 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
@@ -18,37 +18,37 @@ Begin by accessing the `task-form`, `confirm-close-dialog`, and `open-task-form-
 You should use `getElementById()` to access the `task-form` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should assign the `task-form` element to the variable `taskForm`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `confirm-close-dialog` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should assign the `confirm-close-dialog` element to the variable `confirmCloseDialog`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `open-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `open-task-form-btn` element to the variable `openTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
index 2d41b6debe4..6fd78b852ca 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
@@ -14,37 +14,37 @@ You need to access more elements with the `getElementById()` method. This time y
 You should use `getElementById()` to access the `close-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `close-task-form-btn` element to the variable `closeTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `add-or-update-task-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should assign the `add-or-update-task-btn` element to the variable `addOrUpdateTaskBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `cancel-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 You should assign the `cancel-btn` element to the variable `cancelBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
index 216037a9035..941c82e6291 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
@@ -14,37 +14,37 @@ Next, access the `discard-btn`, `tasks-container`, and `title-input` elements us
 You should use `getElementById()` to access the `discard-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should assign the `discard-btn` element to the variable `discardBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `tasks-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should assign the `tasks-container` element to the variable `tasksContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `title-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 You should assign the `title-input` element to the variable `titleInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
index 3f157771ed9..50e9360f0c3 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
@@ -14,25 +14,25 @@ The last set of elements you need to get from the HTML file are the `date-input`
 You should use `getElementById()` to access the `date-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should assign the `date-input` element to the variable `dateInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `description-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 You should assign the `description-input` element to the variable `descriptionInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
index 0b69dc4d1cb..ff4454def4d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
@@ -13,16 +13,40 @@ Use `let` to create a `currentTask` variable and set it to an empty object. This
 
 # --hints--
 
-You should create a `taskData` constant set to an empty array.
+You should have a `const` variable called `taskData`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=/)
 ```
 
-You should use `let` to create an empty `currentTask` object.
+You should assign an array to your `taskData` constant.
 
 ```js
-assert.match(code, /let\s+currentTask\s*=\s*\{\};?/)
+assert.isArray(taskData);
+```
+
+Your `taskData` array should be empty.
+
+```js
+assert.isEmpty(taskData);
+```
+
+You should use `let` to create a `currentTask` variable.
+
+```js
+assert.match(code, /let\s+currentTask/);
+```
+
+You should assign an object to your `currentTask` variable.
+
+```js
+assert.isObject(currentTask);
+```
+
+Your `currentTask` object should be empty.
+
+```js
+assert.isEmpty(currentTask);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
index 65871e122e5..3e9c22c7574 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
@@ -7,9 +7,15 @@ dashedName: step-7
 
 # --description--
 
-Add a `click` event listener to the `closeTaskFormBtn` variable, then use the `showModal()` method on your `confirmCloseDialog` variable. This will display a modal with the `Discard` and `Cancel` buttons.
+The HTML `dialog` element has a `showModal()` method that can be used to display a modal dialog box on a web page.
 
-`showModal()` is a method associated with the HTML `dialog` element. It is used to display a modal dialog box on a web page.
+```js
+dialogElement.showModal();
+```
+
+Add an event listener to the `closeTaskFormBtn` variable and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `showModal()` method on the `confirmCloseDialog` element. This will display a modal with the `Discard` and `Cancel` buttons.
 
 # --hints--
 
@@ -22,13 +28,13 @@ assert.match(code, /closeTaskFormBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `showModal()` method on `confirmCloseDialog`.
+Your event listener's callback function should call the `showModal()` method on the `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1,\s*\(.*\)\s*=>\s*{?\s*confirmCloseDialog\.showModal\(\);?\s*}?\s*\);?/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1,\s*\(.*\)\s*=>\s*(\{\s*confirmCloseDialog\.showModal\(\s*\)\s*;?\s*\}|confirmCloseDialog\.showModal\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
index 58e4e3b0846..a6aad2ff0d2 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
@@ -7,11 +7,15 @@ dashedName: step-8
 
 # --description--
 
-If the user clicks the `Cancel` button, you want to cancel the process (close the modal showing the two buttons) so the user can continue editing.
+If the user clicks the `Cancel` button, you want to cancel the process and close the modal so the user can continue editing. The HTML `dialog` element has a `close()` method that can be used to close a modal dialog box on a web page.
 
-Add a `click` event listener to the `cancelBtn` element, then use the `close()` method on the `confirmCloseDialog` variable.
+```js
+dialogElement.close();
+```
 
-`close()` is a method of the window object you can use to close the current window, or a modal you create with the `dialog` element.
+Add an event listener to the `cancelBtn` element and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `close()` method on the `confirmCloseDialog` element.
 
 # --hints--
 
@@ -24,13 +28,13 @@ assert.match(code, /cancelBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `close()` method on `confirmCloseDialog`. Don't use curly braces.
+Your event listener's callback function should call the `close()` method on `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1\,\s*\(\)\s*\s*=>\s*confirmCloseDialog\.close\(\)\s*\);?/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1\s*\,\s*\(\s*\)\s*=>\s*(\{\s*confirmCloseDialog\.close\(\s*\)\s*;?\s*\}|confirmCloseDialog\.close\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
index 5b5ca6c3ec7..f57a75a6b94 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
@@ -28,19 +28,19 @@ assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1/)
 You should use arrow syntax to set your event listener to an empty pair of curly braces.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 Your event listener should use the `close()` method on `confirmCloseDialog`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?/)
 ```
 
 Your event listener should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
index 8540630eb6b..1ffca402e0e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
@@ -22,19 +22,19 @@ assert.match(code, /taskForm\.addEventListener\(/)
 Your event listener should listen for a `submit` event.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1/)
 ```
 
 You should use arrow syntax to set your event listener to an empty pair of curly braces with `e` as the parameter.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
 ```
 
 You should use the `e.preventDefault()` method to stop the browser from reloading the page.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\);?/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
index 062a8afa5f9..006d4bb2153 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
@@ -35,13 +35,13 @@ assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 You should pass in `item` as the parameter of the arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === currentTask.id`.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
index 2a07077456e..217e6547857 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
@@ -30,19 +30,19 @@ assert.match(code, /const\s+taskObj\s*=\s*\{\s*id/)
 You should use template strings to get `titleInput.value` as the value of your `id` key and convert it to lowercase.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)/)
 ```
 
 You should use `.split(' ')` on `titleInput.value.toLowerCase()`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(('|")\s{1}\1\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)/)
 ```
 
 You should use `.join('-')` on `titleInput.value.toLowerCase().split(' ')`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
index f5f882434b3..b998804835e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
@@ -20,13 +20,13 @@ Create an `if` statement with the condition `dataArrIndex === -1`. Within the `i
 You should create an `if` statement with the condition `dataArrIndex === -1`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{/)
 ```
 
 Your `if` statement should have `taskData.unshift(taskObj)` in it's body.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}/)
 ```
 
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
index 9826fa47c55..7ea656a26ea 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
@@ -26,7 +26,7 @@ assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*(\s*\{?\(\s*ta
 You should use addition assignment to set the `innerHTML` of `tasksContainer` to an empty pair of backticks.
 
 ```js
-assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\)?\s*\}?)/)
+assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\s*\)?\s*\}?)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
index 32e59545715..01485b479fe 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
@@ -15,7 +15,7 @@ You should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("taskData.forEach")[1].split("});")
-assert.match(splitter[0], /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(splitter[0], /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
index bed5904e1ee..0d61313bd7b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
@@ -18,13 +18,13 @@ Use arrow syntax to create a `reset` function and set it to a pair of curly brac
 You should use `const` and arrow syntax to create a `reset` function.
 
 ```js
-assert.match(code, /const\s+reset\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+reset\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 Your `reset` function should be empty.
 
 ```js
-assert.match(reset.toString(), /\(\)\s*\{\s*\}/);
+assert.match(reset.toString(), /\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
index 7e2e549caac..6af664aa2fc 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
@@ -34,7 +34,7 @@ assert.match(reset.toString(), /descriptionInput\.value\s*=\s*('|")\1;?/)
 You should use `classList` to toggle the class `hidden` on `taskForm`
 
 ```js
-assert.match(reset.toString(), /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(reset.toString(), /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 You should set `currentTask` to an empty object.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
index 4e01822ed46..2e0541b14a7 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the `hidden` class on `taskForm`.
 
 ```js
 const splitter = code.split('<button type="button" class="btn">Delete</button>')
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /reset\(\)/)
+assert.match(code, /reset\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
index b66c1c949b0..1eb4980ed37 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("confirmCloseDialog.close();")
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /confirmCloseDialog\.close\(\);?\s*reset\(\);?/)
+assert.match(code, /confirmCloseDialog\.close\(\s*\);?\s*reset\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
index 25791de222f..6b6368a8439 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
@@ -16,7 +16,7 @@ To begin, within the `closeTaskFormBtn` event listener, create a `formInputsCont
 You should use `const` to create a variable `formInputsContainValues` with the value `titleInput.value || dateInput.value || descriptionInput.value;`
 
 ```js
-assert.match(code, /const\s+formInputsContainValues\s*=\s*titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value;?/)
+assert.match(code, /const\s+formInputsContainValues\s*=\s*(titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value|titleInput\.value\s*!==\s*null\s*\|\|\s*dateInput\.value\s*!==\s*null\s*\|\|\s*descriptionInput\.value\s*!==\s*null)\;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
index 4581ad6d4fa..cacb944bb9b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
@@ -14,25 +14,25 @@ Create an `if` statement to check if `formInputsContainValues` is true. If `form
 You should create an `if` statement with the condition `formInputsContainValues`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{/)
 ```
 
 The `if` block of your `if` statement should contain `confirmCloseDialog.showModal();`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `reset()` function in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{\s*reset\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{\s*reset\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
index 3363d165bb2..78bfb95196b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
@@ -16,7 +16,7 @@ Use arrow syntax to create an `addOrUpdateTask` function. Then move the `dataArr
 You should use `const` and arrow syntax to create an `addOrUpdateTask` function.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should move the `dataArrIndex` variable into the `addOrUpdateTask` function.
@@ -31,7 +31,7 @@ You should move the `taskObj` object into the `addOrUpdateTask` function.
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?/)
 ```
 
-You should move the `if` statement with the condition `dataArrIndex === 1` into your `addOrUpdateTask` function.
+You should move the `if` statement with the condition `dataArrIndex === -1` into your `addOrUpdateTask` function.
 
 ```js
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s*===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?\s*if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\)\s*;?\s*\}\s*\}\s*;?/)
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
index c37056959d5..ea76d720013 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
@@ -14,13 +14,13 @@ Use arrow syntax to create an `updateTaskContainer` function. Then move the `tas
 You should use `const` and arrow syntax to create a `updateTaskContainer` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 You should move `taskData.forEach()` and its content into the `updateTaskContainer()` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\{\s*id,\s*title,\s*date,\s*description\s*\}\)\s*=>\s*{\s*\(tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\)\s*}\s*\);?\s*\};?/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\s*\{\s*id,\s*title,\s*date,\s*description\s*\}\s*\)\s*=>\s*{\s*\(\s*tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\s*\)\s*}\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
index fd33f2f67fb..cdde0d313e1 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
@@ -14,13 +14,13 @@ Inside the `addOrUpdateTask` function, call the `updateTaskContainer` and `reset
 You should call the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\)\s*/)
+assert.match(code, /updateTaskContainer\(\s*\)\s*/)
 ```
 
 You should call the `reset` function after calling the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\);?\s*reset\(\);?\s*/)
+assert.match(code, /updateTaskContainer\(\s*\);?\s*reset\(\s*\);?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
index b427f1e9dd1..9608d26d428 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
@@ -14,7 +14,7 @@ Now remove the `reset()` call inside the `taskForm` submit event listener and ca
 You should remove `reset()` and call `addOrUpdateTask()`.
 
 ```js
-assert.match(code, /addOrUpdateTask\(\)/)
+assert.match(code, /addOrUpdateTask\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
index afaa870dadf..6908eb26cba 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
@@ -13,16 +13,16 @@ To enable editing and deleting for each task, add an `onclick` attribute to both
 
 # --hints--
 
-You should add `onclick="editTask(this)"` as the first attribute of the edit button.
+You should add `onclick="editTask(this)"` to your edit button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")editTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3\s*>Edit<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')editTask\(\s*this\s*\)\1)[^>]*>Edit<\/button>/);
 ```
 
-You should add `onclick="deleteTask(this)"` as the first attribute of the delete button.
+You should add `onclick="deleteTask(this)"` to your delete button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")deleteTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3>Delete<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')deleteTask\(\s*this\s*\)\1)[^>]*>Delete<\/button>/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
index 4ec4415c981..8c3c0eddb47 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable and set its value using the `findIndex()` metho
 You should not alter the `deleteTask` function.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
index 86dcdf1c5b7..a9414b20061 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
@@ -30,7 +30,7 @@ Use the `remove()` method to remove the `parentElement` of the `buttonEl` from t
 You should use the `remove()` method to remove the parent element of `buttonEl`.
 
 ```js
-assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\);?/)
+assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\s*\);?/)
 ```
 
 You should use `splice()` on the `taskData` array.
@@ -42,13 +42,13 @@ assert.match(deleteTask.toString(), /taskData\.splice\(/)
 The first argument of your `splice()` method should be `dataArrIndex`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex/)
 ```
 
 The second argument of your `splice()` method should be `1`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex,\s*1\);?/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex,\s*1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
index 12f943b50b0..e3256e34282 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable. For its value, utilize the `findIndex()` metho
 You should not alter the `editTask` function.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
index e502ac9784d..6bb3020b119 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
@@ -14,7 +14,7 @@ Use square bracket notation to retrieve the task to be edited from the `taskData
 You should assign `taskData[dataArrIndex]` to `currentTask`.
 
 ```js
-assert.match(code, /currentTask\s*=\s*taskData\[dataArrIndex\];?/)
+assert.match(code, /currentTask\s*=\s*taskData\s*\[\s*dataArrIndex\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
index e666d1ba889..00b33629a9c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
@@ -14,13 +14,13 @@ At this point, editing a task won't reflect when you submit the task. To make th
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 Your `else` block should have the code `taskData[dataArrIndex] = taskObj`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*taskData\[dataArrIndex\]\s*=\s*taskObj;?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*taskData\s*\[\s*dataArrIndex\s*\]\s*=\s*taskObj;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
index 83fbef7cddd..5f649f9be8f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
@@ -26,13 +26,13 @@ After that, open your browser console and go to the `Applications` tab, select `
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 Your `localStorage.setItem()` should have a value of `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*myTaskArr\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*myTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
index cd186a18aeb..6f380e8f190 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
@@ -16,13 +16,13 @@ To resolve the issue, wrap the data you're saving in the `JSON.stringify()` meth
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 You should wrap `JSON.stringify()` around `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*JSON\.stringify\(myTaskArr\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*JSON\.stringify\(\s*myTaskArr\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
index 7e2832ff7e0..d07fecf9884 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
@@ -16,13 +16,13 @@ Use the `getItem()` method to retrieve the `myTaskArr` array and assign it to th
 You should use `const` to create a `getTaskArr` variable and assign `localStorage.getItem("data")` to it.
 
 ```js
-assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(('|")data\1\);?/)
+assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\1\s*\);?/)
 ```
 
 You should log the `getTaskArr` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArr\);?/)
+assert.match(code, /console\.log\(\s*getTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
index 6726683e63a..61c813df7b0 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
@@ -18,13 +18,13 @@ Check the console to see the difference between `getTaskArr` and `getTaskObj`.
 You should use `const` to create a `getTaskArrObj` variable and assign it to `JSON.parse(localStorage.getItem('data'));`.
 
 ```js
-assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\);?/)
+assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\);?/)
 ```
 
 You should log the `getTaskArrObj` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArrObj\);?/)
+assert.match(code, /console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
index 48dfd88ae49..0f286ea628e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
@@ -16,7 +16,7 @@ Remove the `data` item from local storage and open the console to observe the re
 You should use `localStorage.removeItem()` to remove the `data` item from the browser's local storage.
 
 ```js
-assert.match(code, /localStorage\.removeItem\(('|")data\1\);?/)
+assert.match(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
index 1e402cadb9a..0300310d9be 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
@@ -16,13 +16,13 @@ Remove `localStorage.removeItem()` and use `localStorage.clear()` instead. You d
 You should remove `localStorage.removeItem("data")`.
 
 ```js
-assert.notMatch(code, /localStorage\.removeItem\(('|")data\1\);/)
+assert.notMatch(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);/)
 ```
 
 You should remove everything from the browser `local storage` with `localStorage.clear()`.
 
 ```js
-assert.match(code, /localStorage\.clear\(\);?/)
+assert.match(code, /localStorage\.clear\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
index 248055ea722..1414b27cdce 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
@@ -14,7 +14,7 @@ Remove the `myTaskArr` array and all of the code for `localStorage` because you
 You should remove `myTaskArr` and all the code related to `localStorage` that you've just learned.
 
 ```js
-assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s"Walk\s*the\s*Dog",\s*date:\s*"22-04-2022"\s*\},\s*\{\s*task:\s"Read\s*some\s*books",\s*date:\s*"02-11-2023"\s*\},\s*\{\s*task:\s"Watch\s*football",\s*date:\s*"10-08-2021"\s*\},\s*\];?\s*localStorage\.setItem\("data", JSON\.stringify\(myTaskArr\)\);\s*localStorage\.clear\(\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\("data"\)\s*console\.log\(getTaskArr\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\("data"\)\);?\s*console\.log\(getTaskArrObj\);?/)
+assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s('|")Walk\s*the\s*Dog\1,\s*date:\s*('|")22-04-2022\2\s*\},\s*\{\s*task:\s('|")Read\s*some\s*books\3,\s*date:\s*('|")02-11-2023\4\s*\},\s*\{\s*task:\s('|")Watch\s*football\5,\s*date:\s*('|")10-08-2021\6\s*\},\s*\]\s*;?\s*localStorage\.setItem\(('|")data\7, JSON\.stringify\(\s*myTaskArr\s*\)\s*\);\s*localStorage\.clear\(\s*\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\8\s*\)\s*console\.log\(\s*getTaskArr\s*\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\9\s*\)\s*\);?\s*console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
@@ -316,7 +316,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -346,7 +346,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
index 202d5f1d35a..de53e1a9f44 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
@@ -24,13 +24,13 @@ assert.match(code, /localStorage\.setItem\(/)
 You should pass in `"data"` as the first argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
index f9018ffba7d..85948e5fdce 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
@@ -24,14 +24,14 @@ You should pass in `"data"` as the first argument of your `localStorage.setItem(
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
index 8d9473d11e1..0dd4c630408 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
@@ -16,7 +16,7 @@ Set `taskData` to the retrieval of `data` from local storage **or** an empty arr
 You should set the `taskData` variable to `JSON.parse(localStorage.getItem("data")) || [];`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\)\s*\|\|\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\)\s*\|\|\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -321,7 +321,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -352,7 +352,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
index e6165c0a45b..66376b9472b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
@@ -20,13 +20,13 @@ With that, you've completed this project.
 You should create an `if` statement with `(taskData.length)` as the condition. As a reminder, `0` is a falsy value.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*/)
 ```
 
 You should call the `updateTaskContainer` function in your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*updateTaskContainer\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*updateTaskContainer\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
index 2e444385a9c..a109fd566fd 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
@@ -20,7 +20,7 @@ console.log(Date.now()); // 1628586800000
 You should attach `-${Date.now()}` to the existing value of the `id` key. Don't forget it needs to be inside the template string.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
index 12801b907b5..e9a2571e6a7 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
@@ -1,32 +1,18 @@
 ---
 id: 63e02a333354343b595d64ca
-title: Step 16
+title: Step 15
 challengeType: 0
-dashedName: step-16
+dashedName: step-15
 ---
 
 # --description--
 
-Ora che hai testato il metodo `Object.freeze()`, puoi eliminare le due righe di codice dello step precedente.
-
 Il prossimo passo è accedere alla chiave chiamata `sport` dell'oggetto `myFavoriteFootballTeam` e assegnarla a una nuova variabile dichiarata con `const` chiamata `sport`.
 
 Ricorda che puoi usare la notazione con punto per questo.
 
 # --hints--
 
-Dovresti rimuovere l'assegnazione della stringa `USA` a `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /myFavoriteFootballTeam\.team\s*=\s*('|"|`)USA\1\s*/);
-```
-
-Dovresti rimuovere il `console.log` per `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /console\.log\(\s*myFavoriteFootballTeam\.team\s*\)/);
-```
-
 Dovresti usare `const` per dichiarare la variabile `sport`.
 
 ```js
@@ -462,8 +448,6 @@ Object.freeze(myFavoriteFootballTeam);
 
 --fcc-editable-region--
 
-myFavoriteFootballTeam.team = "USA";
-console.log(myFavoriteFootballTeam.team);
 
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
index 3bbf2356243..2b0ba4786ba 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
@@ -1,8 +1,8 @@
 ---
 id: 63e0334b7a24bd3c96aca4de
-title: Step 17
+title: Step 16
 challengeType: 0
-dashedName: step-17
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
index ea087fbaa2f..8eb11b9a691 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e036373fc9173d284e165a
-title: Step 18
+title: Step 17
 challengeType: 0
-dashedName: step-18
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
index d92e4fa4405..39f41b4025a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
@@ -1,8 +1,8 @@
 ---
 id: 63e03b86008bbb3e1c3de846
-title: Step 19
+title: Step 18
 challengeType: 0
-dashedName: step-19
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
index 203576838b2..890bf0bb0c8 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
@@ -1,8 +1,8 @@
 ---
 id: 63e042661ad2663f0d468740
-title: Step 20
+title: Step 19
 challengeType: 0
-dashedName: step-20
+dashedName: step-19
 ---
 
 # --description--
@@ -15,7 +15,7 @@ Usa la destrutturazione degli oggetti per accedere al valore di `coachName`.
 
 ```js
 
-assert.match(code, /const\s*{\s*coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach\s*/)
+assert.match(code, /const\s*{\s*(coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach|headCoach\s*:\s*{\s*coachName\s*}\s*}\s*=\s*myFavoriteFootballTeam)\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
index 4b1445e8794..149ac791b6c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
@@ -1,8 +1,8 @@
 ---
 id: 63e050bf935ac341b88326d6
-title: Step 21
+title: Step 20
 challengeType: 0
-dashedName: step-21
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
index 891f824c094..3562608e3f9 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05557016dfd45ea49152c
-title: Step 22
+title: Step 21
 challengeType: 0
-dashedName: step-22
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
index d0fc0087e4f..70772e4cba9 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05c00b615bb46ac87273a
-title: Step 23
+title: Step 22
 challengeType: 0
-dashedName: step-23
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
index fe28dea762e..5fed1d04307 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
@@ -1,8 +1,8 @@
 ---
 id: 63e060df21bca347b2d2b374
-title: Step 24
+title: Step 23
 challengeType: 0
-dashedName: step-24
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
index 51e867d43f9..3cdb876e4be 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e062d6090ebb486a4eda3a
-title: Step 25
+title: Step 24
 challengeType: 0
-dashedName: step-25
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
index 4062dd67903..e04ad1e925a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
@@ -1,8 +1,8 @@
 ---
 id: 63e949b8327aa2aca2ca8eac
-title: Step 26
+title: Step 25
 challengeType: 0
-dashedName: step-26
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
index 9b1fbcc6466..8703722b9d7 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
@@ -1,8 +1,8 @@
 ---
 id: 63e94dae6dcedbad73f2f6ee
-title: Step 27
+title: Step 26
 challengeType: 0
-dashedName: step-27
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
index b79694e3282..8864d1f95db 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
@@ -1,8 +1,8 @@
 ---
 id: 63e954321b0a77ae4f6d9650
-title: Step 28
+title: Step 27
 challengeType: 0
-dashedName: step-28
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
index a0b3a76f468..bb831608c29 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95a45dce95baf41dd4f78
-title: Step 29
+title: Step 28
 challengeType: 0
-dashedName: step-29
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
index 6ad8eda16ff..bbe08424628 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95e39860dc5b01ebe9be0
-title: Step 30
+title: Step 29
 challengeType: 0
-dashedName: step-30
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
index 309ff0d5eff..f47473d156f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9667c881b61b1e338d276
-title: Step 31
+title: Step 30
 challengeType: 0
-dashedName: step-31
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
index ff8ac6a93ec..980359fb10f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96938d2a347b2734a1587
-title: Step 32
+title: Step 31
 challengeType: 0
-dashedName: step-32
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
index 0471bdb7892..3577f669db4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96eb94c97b6b31ee50f63
-title: Step 33
+title: Step 32
 challengeType: 0
-dashedName: step-33
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
index a96742ed91b..c05ecd9756d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9718d7d490bb3940d5a0a
-title: Step 34
+title: Step 33
 challengeType: 0
-dashedName: step-34
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
index 1bd4ae50b0d..f090c9938e2 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9737f686c76b4078a60f4
-title: Step 35
+title: Step 34
 challengeType: 0
-dashedName: step-35
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
index ec74ed39027..010166b2445 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28972973504e7bb58b0b3
-title: Step 36
+title: Step 35
 challengeType: 0
-dashedName: step-36
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
index aa5a25dda75..9cb5d1d2e81 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28ef082d771e8bf71f94a
-title: Step 37
+title: Step 36
 challengeType: 0
-dashedName: step-37
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
index 09cc5b84cac..3c3af7168bc 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
@@ -1,8 +1,8 @@
 ---
 id: 63f293c804d6f9e9a83ca4c5
-title: Step 38
+title: Step 37
 challengeType: 0
-dashedName: step-38
+dashedName: step-37
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Apri la console e fai una selezione dal menu a discesa dei giocatori. Dovresti v
 Dovresti aggiungere un `console.log` con il valore `e.target.value`.
 
 ```js
-assert.match(code, /console\.log\s*\(e\.target\.value\)\s*/)
+assert.match(code, /console\.log\s*\(\s*e\.target\.value\s*\)\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
index 192f1a94cc8..ad1da662e28 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29804e3ec00ea6fab1ec4
-title: Step 39
+title: Step 38
 challengeType: 0
-dashedName: step-39
+dashedName: step-38
 ---
 
 # --description--
@@ -18,7 +18,7 @@ All'interno della funzione callback, accedi alla proprietà `innerHTML` dell'ele
 Non dovresti avere l'istruzione `console.log` nel tuo codice.
 
 ```js
-assert.notMatch(code, /\s*console\.log\(e\.target\.value\)/);
+assert.notMatch(code, /\s*console\.log\(\s*e\.target\.value\s*\)/);
 ```
 
 Dovresti accedere alla proprietà `innerHTML` dell'elemento `playerCards`.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
index 7a96f836ba7..40d7b9c308b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29ce62aea65eb041758c8
-title: Step 40
+title: Step 39
 challengeType: 0
-dashedName: step-40
+dashedName: step-39
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /switch\s*\(\s*e\.target\.value\s*\)/);
 L'istruzione `switch` dovrebbe essere vuota.
 
 ```js
-assert.match(code, /\s*switch\s*\(e\.target\.value\)\s*{\s*}/);
+assert.match(code, /\s*switch\s*\(\s*e\.target\.value\s*\)\s*{\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
index 9cca70b7a2a..7945eb81bad 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a0a860790eebe61bf908
-title: Step 41
+title: Step 40
 challengeType: 0
-dashedName: step-41
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
index bdea4ec442b..5cbccf8931f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a4a8087e6dec8ec47f16
-title: Step 44
+title: Step 43
 challengeType: 0
-dashedName: step-44
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
index 9c4d968171b..9f6576e9ec1 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a5f09a785aed155c0a56
-title: Step 45
+title: Step 44
 challengeType: 0
-dashedName: step-45
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
index 2636339a1a8..6bb2599fc38 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a8e14fb388edd3242527
-title: Step 46
+title: Step 45
 challengeType: 0
-dashedName: step-46
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
index 4fcd4048eb9..c97e1791a29 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2aa36fcdc63ee4e18fc37
-title: Step 47
+title: Step 46
 challengeType: 0
-dashedName: step-47
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
index f400f171d77..55337ee258f 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2ab4f6c52c5eec6d68de4
-title: Step 48
+title: Step 47
 challengeType: 0
-dashedName: step-48
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
index 7b68b878ed8..5c12e636cd6 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
@@ -1,8 +1,8 @@
 ---
 id: 641fc88d8fa7127f76e0324f
-title: Step 42
+title: Step 41
 challengeType: 0
-dashedName: step-42
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
index f6dda2b8881..78fad33ad4b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
@@ -1,8 +1,8 @@
 ---
 id: 641fcfd468185384ac218b7d
-title: Step 43
+title: Step 42
 challengeType: 0
-dashedName: step-43
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
index 67e28f2f425..417198b49f7 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-After alerting the user if the number input is empty of the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
+After alerting the user if the number input is empty or the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
 
 Add the `return` keyword after `alert()`.
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
index 768f1718f78..d0d0ec35907 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
@@ -24,7 +24,6 @@ Use the `.reverse()` method to reverse the order of the `remainders` array, and
 You should use the `.reverse()` method on the `remainders` array.
 
 ```js
-console.log(String(decimalToBinary))
 assert.match(String(decimalToBinary), /remainders\.reverse\(\s*\)/);
 ```
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
index 746951dd666..5ed342ffa7e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
@@ -31,7 +31,7 @@ assert.notMatch(String(decimalToBinary), /else\s+if\s*\([\s\S]+\)/);
 Your `decimalToBinary()` function should have an `if` statement that checks if `input` is equal to `0` or `1`.
 
 ```js
-assert.match(String(decimalToBinary), /if\s*\(input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
+assert.match(String(decimalToBinary), /if\s*\(\s*input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(\s*input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
 ```
 
 If input is equal to `0` or `1`, your `decimalToBinary()` function should return `String(input)`.
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
index 4ab8aae3151..fed222bb5d6 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
@@ -44,7 +44,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1000` as the second argument to the `setTimeout` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
index 15b0cdcefcb..8d8ae0b1b89 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
@@ -48,7 +48,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
index c6e6a226b60..ac8d0fbdcfd 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
@@ -46,7 +46,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
index 70ed01748da..40d1ce96c55 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the `id` attribute to the `inputVal`
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
index 1718e4c35a2..0bd475bffc7 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the text of the paragraph element to
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
index 05bbe96fcd9..977994840fe 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `showMsgDelay` property of the c
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)showMsgDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)showMsgDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
index 326a41c1d67..7f824971d0c 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
@@ -18,7 +18,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
index 297377c2fdb..223994c9b8b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
@@ -27,7 +27,7 @@ You should set the `textContent` property of the targeted element equal to the `
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\[\s*('|"|`)\s*msg\s*\1\s*\]/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\s*\[\s*('|"|`)\s*msg\s*\1\s*\]/
 );
 ```
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
index e370496a900..c8e72499662 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `removeElDelay` property of the
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)removeElDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)removeElDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
index e54a2593b37..f8760295236 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
@@ -16,7 +16,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.lengthOf(
   String(showAnimation).match(
-    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
+    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
   ),
   2
 );
@@ -27,7 +27,7 @@ You should chain the `.remove()` method to the `.getElementById()` method.
 ```js
 assert.match(
   String(showAnimation),
-  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
+  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
 );
 ```
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
index 8b2698a245a..ac765b1ccf3 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
@@ -18,7 +18,7 @@ You should set the `textContent` property of `result` equal to calling `decimalT
 ```js
 assert.match(
   String(showAnimation),
-  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\[('|"|`)textContent\1\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
+  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\s*\[\s*('|"|`)textContent\1\s*\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
 );
 ```
 
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
index 38c8b7b3fe7..1f3abff7188 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
@@ -9,9 +9,9 @@ dashedName: step-5
 
 Tornando all'event listener, devi aggiornare il testo dell'elemento `result`.
 
-Usa un operatore ternario per aggiornare il testo dell'elemento `result` dopo l'istruzione `if`. Controlla la veridicità della chiamata `isSpam()` sull'attributo value dell'elemento `messageInput`. Se è true, imposta il testo su `Oh no! This looks like a spam message.`. Altrimenti, imposta il testo su `This message does not seem to contain any spam.`
+After the `if` statement, use a ternary operator to check the truthiness of calling `isSpam()` with `messageInput.value` as the argument. If true, set the `textContent` property on the `result` element to `Oh no! This looks like a spam message.`. Otherwise, set it to `This message does not seem to contain any spam.`
 
-Quindi imposta l'attributo value dell'elemento `messageInput` su una stringa vuota.
+Then set the `messageInput` element's `value` property to an empty string.
 
 # --hints--
 
@@ -21,10 +21,10 @@ Dovresti usare l'operatore di assegnazione per impostare la proprietà `textCont
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*/)
 ```
 
-Dovresti assegnare la chiamata della funzione `isSpam()` a `result.textContent`.
+You should call the `isSpam()` function after the assignment operator `=` and before the `?` ternary operator.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(.*\)\s*\?/)
 ```
 
 Dovresti usare la sintassi ternaria per controllare la veridicità di `isSpam(messageInput.value)`.
@@ -45,10 +45,10 @@ L'espressione falsy dell'operatore ternario dovrebbe impostare la proprietà `te
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*/);
 ```
 
-Dopo l'operatore ternario, imposta il `value` di `messageInput` su una stringa vuota.
+After your ternary, set the `value` property on the `messageInput` element to an empty string.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5\s*;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
index c8bedf3010f..c1a537dc223 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
@@ -24,13 +24,13 @@ assert.match(code, /const\s+currentDateParagraph\s+=/);
 You should use `document.getElementById()` to get the `#current-date` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)current-date\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)current-date\1\s*\)/);
 ```
 
 You should assign the `#current-date` element to your `currentDateParagraph` variable.
 
 ```js
-assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(('|"|`)current-date\1\)/g));
+assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(\s*('|"|`)current-date\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
index 3295a750daa..47c15587f56 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+dateOptionsSelectElement\s+=/);
 You should use `document.getElementById()` to get the `#date-options` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)date-options\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)date-options\1\s*\)/);
 ```
 
 You should assign the `#date-options` element to your `dateOptionsSelectElement` variable.
 
 ```js
-assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(('|"|`)date-options\1\)/g));
+assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(\s*('|"|`)date-options\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
index 788fae024c1..7a064099cb4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
@@ -32,7 +32,7 @@ assert.match(code, /const\s+date\s+=/);
 You should assign a `Date` object to your `date` variable with `new Date()`.
 
 ```js
-assert(code.match(/const\s+date\s+=\s+new\s+Date\(\)/g));
+assert(code.match(/const\s+date\s+=\s+new\s+Date\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
index 4fa72cc6a02..9e8da0034f4 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
@@ -30,7 +30,7 @@ assert.match(code, /const\s+day\s+=/);
 You should assign the `date.getDate()` to your `day` variable.
 
 ```js
-assert(code.match(/const\s+day\s+=\s+date\.getDate\(\)/g));
+assert(code.match(/const\s+day\s+=\s+date\.getDate\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
index 856addb1fea..f29a6c67f7a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+month\s+=/);
 You should assign the `date.getMonth() + 1` to your `month` variable.
 
 ```js
-assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\)\s*\+\s*1/g));
+assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\s*\)\s*\+\s*1/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
index 36542963348..b2d4d8ec05a 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+year\s+=/);
 You should assign the `date.getFullYear()` to your `year` variable.
 
 ```js
-assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\)/g));
+assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
index b43a24cadcf..ee5b17ed5f6 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+hours\s+=/);
 You should assign the `date.getHours()` to your `hours` variable.
 
 ```js
-assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\)/g));
+assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
index a48315193cd..5bdd824a5bb 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+minutes\s+=/);
 You should assign the `date.getMinutes()` to your `minutes` variable.
 
 ```js
-assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\)/g));
+assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
index b2eaac290cd..d8a57108d7e 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
@@ -16,7 +16,7 @@ Open up the console and you should see the date printed out.
 You should have a `console.log(formattedDate)` line in your code.
 
 ```js
-assert.match(code, /console\.log\(formattedDate\)/);
+assert.match(code, /console\.log\(\s*formattedDate\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
index 3ea8c49afc6..c58dd15c858 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
@@ -22,7 +22,7 @@ assert(code.match(/currentDateParagraph\.textContent\s*=\s*formattedDate/g));
 You should not have a `console.log(formattedDate);` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(formattedDate\);/);
+assert.notMatch(code, /console\.log\(\s*formattedDate\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
index dbb258e4069..da96053247d 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
@@ -15,11 +15,17 @@ element.addEventListener("change", () => {
 });
 ```
 
-Chain the `addEventListener` method to `dateOptionsSelectElement` where the first argument is `change` and the second argument is an empty arrow function.
+Attach the `addEventListener` method to the `dateOptionsSelectElement`. The first argument of the event listener should be the string `change` and the second argument should be an empty arrow function.
 
 # --hints--
 
-You should use the `addEventListener` method to add a `change` event listener to `dateOptionsSelectElement`.
+You should attach the `addEventListener` method to the `dateOptionsSelectElement`.
+
+```js
+assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(/g));
+```
+
+Your event listener should listen for a `change` event.
 
 ```js
 assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(\s*('|")change\1/g));
diff --git a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
index 873ad4fd565..5c64acf390b 100644
--- a/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
+++ b/curriculum/challenges/italian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
@@ -22,7 +22,7 @@ Chain the `.reverse()` method to the end of `.split()` method.
 You should use the `.reverse()` method to reverse the order of the array returned by `.split()`.
 
 ```js
-assert(code.match(/\.reverse\(\)/g));
+assert(code.match(/\.reverse\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/italian/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md b/curriculum/challenges/italian/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
index 92ca17db79b..f04c11b7430 100644
--- a/curriculum/challenges/italian/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
+++ b/curriculum/challenges/italian/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
@@ -109,7 +109,6 @@ assert(getCorrectStyle()?.textAlign === 'center');
 # --seed--
 
 ## --seed-contents--
-
 ```css
 ```
 
diff --git a/curriculum/challenges/italian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md b/curriculum/challenges/italian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
index 6480354b9f3..cf7e94d0967 100644
--- a/curriculum/challenges/italian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
+++ b/curriculum/challenges/italian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
@@ -29,4 +29,4 @@ They are outdated technologies.
 
 ## --video-solution--
 
-1
+2
diff --git a/curriculum/challenges/italian/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md b/curriculum/challenges/italian/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
index fa5b427fdc5..857d52d4c51 100644
--- a/curriculum/challenges/italian/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
+++ b/curriculum/challenges/italian/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
@@ -1,5 +1,5 @@
 ---
-id: 657e0d0037192f3d9e3d5417 
+id: 657e0d0037192f3d9e3d5417
 title: Task 128
 challengeType: 22
 dashedName: task-128
diff --git a/curriculum/challenges/italian/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md b/curriculum/challenges/italian/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
index f8949309ce8..8b4e002d454 100644
--- a/curriculum/challenges/italian/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
+++ b/curriculum/challenges/italian/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
@@ -13,7 +13,7 @@ Bob: Alright, team. This is Alice's first day with _ , so please let _ introduce
 -->
 # --description--
 
-You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sould more natural. Listen for the object pronouns Bob uses in this audio.
+You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sound more natural. Listen for the object pronouns Bob uses in this audio.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/italian/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md b/curriculum/challenges/italian/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
index 4450385f409..39f644ee9ab 100644
--- a/curriculum/challenges/italian/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
+++ b/curriculum/challenges/italian/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
@@ -26,13 +26,13 @@ L'algoritmo segue:
   <li>Seed the RNG with the number of the deal.
   </li><li>Crea un array di 52 carte: Asso di Fiori, Asso di Quadri, Asso di Cuori, Asso di Picche, 2 di Fiori, 2 di Quadri, e così via tra i semi: Asso, 2, 3, 4, 5, 6, 7, 8, 9, 10, Fante, Regina, Re. Gli indici dell'array sono da 0 a 51, con l'asso di fiori a 0, e Re di picche a 51.</li>
   <li>Fino a quando l'array non è vuoto:</li>
-  <li>Scegli una carta casuale dall'indice ≡ prossimo numero casuale (modulo lunghezza dell'array).</li>
     <ul>
+      <li>Choose a random card at <i>index</i> ≡ <i>next random number</i> (mod <i>array length</i>).</li>
       <li>Swap this random card with the last card of the array.</li>
-      <li>Rimuovi questa carta casuale dall'array. (La lunghezza dell'array scende di 1.)</li>
-      <li>Distribuisci questa carta casuale.</li>
+      <li>Remove this random card from the array. (Array length goes down by 1.)</li>
+      <li>Deal this random card.</li>
     </ul>
-  <li>Distribuisci tutte le 52 carte, a faccia in su, su 8 colonne. Le prime 8 carte vanno in 8 colonne, le sucessive 8 carte vanno sulle prime 8 carte, e così via.</li>
+  <li>Deal all 52 cards, face up, across 8 columns. The first 8 cards go in 8 columns, the next 8 cards go on the first 8 cards, and so on.</li>
 </ol>
 
 **Per esempio:**
diff --git a/curriculum/challenges/italian/22-rosetta-code/rosetta-code-challenges/execute-brain.md b/curriculum/challenges/italian/22-rosetta-code/rosetta-code-challenges/execute-brain.md
index c3e2f58d622..62a7d597284 100644
--- a/curriculum/challenges/italian/22-rosetta-code/rosetta-code-challenges/execute-brain.md
+++ b/curriculum/challenges/italian/22-rosetta-code/rosetta-code-challenges/execute-brain.md
@@ -1,6 +1,6 @@
 ---
 id: 59e0a8df964e4540d5abe599
-title: Esegui Brain****
+title: Execute Brain****
 challengeType: 1
 forumTopicId: 302261
 dashedName: execute-brain
@@ -10,28 +10,28 @@ dashedName: execute-brain
 
 Write a function to implement a Brain\*\*\*\* interpreter. The function will take a string as a parameter and should return a string as the output. More details are given below:
 
-RCBF è un set di compilatori e interpreti <a href="https://rosettacode.org/wiki/Brainf***" target="_blank" rel="noopener noreferrer nofollow">Brainf\*\*\*</a> scritti per Rosetta Code in una varietà di linguaggi.
+RCBF is a set of <a href="https://rosettacode.org/wiki/Brainf***" target="_blank" rel="noopener noreferrer nofollow">Brainf\*\*\*</a> compilers and interpreters written for Rosetta Code in a variety of languages.
 
-Di seguito sono riportati i link a ciascuna delle versioni di RCBF.
+Below are links to each of the versions of RCBF.
 
-Un'implementazione deve solo attuare correttamente le seguenti istruzioni:
+An implementation need only properly implement the following instructions:
 
-| Command                   | Descrizione                                                                                           |
-| ------------------------- | ----------------------------------------------------------------------------------------------------- |
-| <code>></code> | Move the pointer to the right                                                                         |
-| <code>&lt;</code> | Sposta il puntatore a sinistra                                                                        |
-| <code>+</code> | Incrementa la cella di memoria al puntatore                                                           |
-| <code>-</code> | Decrementa la cella di memoria al puntatore                                                           |
-| <code>.</code> | Esegue l'output del carattere indicato dalla cella al puntatore                                       |
-| <code>,</code> | Inserisci un carattere e memorizzalo nella cella al puntatore                                         |
-| <code>\[</code> | Salta oltre la corrispondente <code>]</code> se la cella al puntatore è 0                    |
-| <code>]</code> | Torna indietro alla corrispondente <code>\[</code> se la cella sotto il puntatore non è zero |
+| Command           | Description                                                                        |
+| ----------------- | ---------------------------------------------------------------------------------- |
+| <code>></code>    | Move the pointer to the right                                                      |
+| <code>&lt;</code> | Move the pointer to the left                                                       |
+| <code>+</code>    | Increment the memory cell under the pointer                                        |
+| <code>-</code>    | Decrement the memory cell under the pointer                                        |
+| <code>.</code>    | Output the character signified by the cell at the pointer                          |
+| <code>,</code>    | Input a character and store it in the cell at the pointer                          |
+| <code>\[</code>   | Jump past the matching <code>]</code> if the cell under the pointer is 0           |
+| <code>]</code>    | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
 
-Qualsiasi dimensione della cella è consentita, il supporto EOF (*E*nd-*O*f-*F*ile) è opzionale, come se tu avessi una memoria limitata o illimitata.
+Any cell size is allowed, EOF (*E*nd-*O*-*F*ile) support is optional, as is whether you have bounded or unbounded memory.
 
 # --hints--
 
-`brain(bye)` dovrebbe restituire una stringa
+`brain(bye)` should return a string
 
 ```js
 assert(typeof brain(bye) === 'string');
@@ -43,19 +43,19 @@ assert(typeof brain(bye) === 'string');
 assert.equal(brain('++++++[>++++++++++<-]>+++++.'), 'A');
 ```
 
-`brain(bye)` dovrebbe restituire `Goodbye, World!\r\n`
+`brain(bye)` should return `Goodbye, World!\r\n`
 
 ```js
 assert.equal(brain(bye), 'Goodbye, World!\r\n');
 ```
 
-`brain(hello)` dovrebbe restituire `Hello World!\n`
+`brain(hello)` should return `Hello World!\n`
 
 ```js
 assert.equal(brain(hello), 'Hello World!\n');
 ```
 
-`brain(fib)` dovrebbe restituire `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89`
+`brain(fib)` should return `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89`
 
 ```js
 assert.equal(brain(fib), '1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89');
diff --git a/curriculum/challenges/japanese/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md b/curriculum/challenges/japanese/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
index 0005eea2546..ba2bfe318bc 100644
--- a/curriculum/challenges/japanese/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
+++ b/curriculum/challenges/japanese/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
@@ -22,7 +22,8 @@ The `updateRecords` function takes 4 arguments represented by the following func
 -   Your function must always return the entire `records` object.
 -   `value` が空文字列の場合は、指定された `prop` プロパティをアルバムから削除します。
 -   If `prop` isn't `tracks` and `value` isn't an empty string, assign the `value` to that album's `prop`.
--   If `prop` is `tracks` and `value` isn't an empty string, you need to update the album's `tracks` array. First, if the album does not have a `tracks` property, assign it an empty array. Then add the `value` as the last item in the album's `tracks` array.
+-   If `prop` is `tracks` and `value` isn't an empty string, but the album doesn't have a `tracks` property, create an empty array and add `value` to it.
+-   If prop is `tracks` and `value` isn't an empty string, add `value` to the end of the album's existing `tracks` array.
 
 **注:** テストには `recordCollection` オブジェクトのコピーが使用されます。 You should not directly modify the `recordCollection` object.
 
diff --git a/curriculum/challenges/japanese/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md b/curriculum/challenges/japanese/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
index 1ef2fffceb3..9e6bd1cc046 100644
--- a/curriculum/challenges/japanese/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
+++ b/curriculum/challenges/japanese/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
@@ -8,7 +8,7 @@ dashedName: serialization-of-a-user-object
 
 # --description--
 
-シリアライズとデシリアライズは認証に関する重要な概念です。 オブジェクトをシリアライズするとは、その内容を小さな*キー*に変換して、元のオブジェクトにデシリアライズできるようにすることを意味します。 これにより、 新しいページをリクエストするたびにユーザー名とパスワードのような認証データを送信することなく、誰がサーバーと通信したかを知ることができます。
+Serialization and deserialization are important concepts in regard to authentication. オブジェクトをシリアライズするとは、その内容を小さな*キー*に変換して、元のオブジェクトにデシリアライズできるようにすることを意味します。 これにより、 新しいページをリクエストするたびにユーザー名とパスワードのような認証データを送信することなく、誰がサーバーと通信したかを知ることができます。
 
 To set this up properly, you need to have a serialize function and a deserialize function. In Passport, these can be created with:
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
index 50354e419d4..817d5f0be21 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
@@ -19,8 +19,8 @@ You should use the `append()` method to append `start` to `paths[start]`.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\.append\s*\(\s*start\s*\)/m));
+    const {function_body} = shortest;
+    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\s*\.append\s*\(\s*start\s*\)/m));
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
index d61e386b3aa..10bc7490fb3 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
@@ -27,8 +27,8 @@ You should call `extend()` on the neighbour node path passing the current node p
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
index 3be6eff51e7..7208acf8889 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
@@ -16,8 +16,8 @@ You should append `node` to `paths[node]` just after your `else` statement.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\.append\s*\(\s*node\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\s*\.append\s*\(\s*node\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
index 4700cb22a15..09beb121bfb 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
@@ -28,7 +28,7 @@ You should print the provided string inside your new `for` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
+    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(\s*f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
index aec7cadb562..7ce13a57003 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
@@ -32,7 +32,7 @@ You should create a variable called `targets_to_print` after your `while` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=/ms));
   }
 })
 ```
@@ -43,7 +43,7 @@ You should the ternary syntax to assign `[target]` when `target` is truthy, and
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
index 7d99db0dacb..d4004f70b95 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
@@ -25,7 +25,7 @@ Just before your `print()` call, use the `del` keyword to delete the `age` key a
 You should use the `del` keyword to delete `copper['age']` before the `print()` call.
 
 ```js
-({ test: () => assert.match(code, /^del\s+copper\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
+({ test: () => assert.match(code, /^del\s+copper\s*\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
index 9d262df5243..b10680c26c7 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
@@ -24,7 +24,7 @@ Create an `__init__` method inside your `Board` class.
 Your method should be named `__init__`. Don't add any parameters.
 
 ```js
-assert.match(code, / +def\s+__init__\s*\(\)\:/);
+assert.match(code, / +def\s+__init__\s*\(\s*\)\:/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
index 4df71f2aa91..0ebf17eebfb 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
@@ -43,7 +43,6 @@ class Board:
 --fcc-editable-region--
         for index, line in enumerate(self.board):
           row_list = []
-          
+
 --fcc-editable-region--
 ```
-
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
index 807ddbeb3da..41e95f43ed1 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
@@ -16,7 +16,7 @@ Use list slicing to create the three lists of equal length representing the `lin
 You should have `enumerate([line[:3], line[3:6], line[6:]], start=1)` within the inner `for` loop.
 
 ```js
-assert.match(code, /\[line\[:3\],\s*line\[3:6\],\s*line\[6:\]\]\s*,\s*start\s*=\s*1/);
+assert.match(code, /\[\s*line\s*\[\s*:3\s*\]\s*,\s*line\s*\[\s*3\s*:\s*6\s*\]\s*,\s*line\s*\[\s*6\s*:\s*\]\s*\]\s*,\s*start\s*=\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
index 50864660e75..b12fe2d9e97 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
@@ -14,13 +14,13 @@ In the `try` block, attempt to find the index of the first occurrence of `0` in
 Use the index of the first occurrence of `0` in the current row using `contents.index(0)`.
 
 ```js
-assert.match(code, /contents\.index\(0\)/)
+assert.match(code, /contents\.index\(\s*0\s*\)/)
 ```
 
 You should have `col = contents.index(0)` within the `try` block.
 
 ```js
-assert.match(code, /col\s*=\s*contents\.index\(0\)/)
+assert.match(code, /col\s*=\s*contents\.index\(\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
index 277d62b3296..4a734856ae3 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
@@ -16,7 +16,7 @@ You should check if the number(`num`) is not present in `self.board[row]`.
 You should have `num not in self.board[row]` within `valid_in_row`.
 
 ```js
-assert.match(code, /num\s+not\s+in\s+self\.board\[row\]/)
+assert.match(code, /num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
index a363d9e0990..810446bdc41 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
@@ -21,7 +21,7 @@ You should have `return num not in self.board[row]` within `valid_in_row`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_row");
 const {function_body} = valid;
-assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\[row\]/);
+assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
index f07b5319f74..fcc742c2387 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] != num` within `valid_in_col`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /self\.board\[row\]\[col\]\s*!=\s*num/);
+assert.match(function_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
index a65f54c68ea..16e8d58372e 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
@@ -28,7 +28,7 @@ You should have `all(self.board[row][col] != num for row in range(9))` within `v
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /all\s*\(\s*self\.board\[row\]\[col\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
+assert.match(function_body, /all\s*\(\s*self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
index 1fb1a70ac99..8b3b4ab2132 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
@@ -21,7 +21,7 @@ You should assign the result of `(row // 3) * 3` to `row_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /row_start\s*=\s*\(row\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /row_start\s*=\s*\(\s*row\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
index 96c33dddb97..f9ab94ebf06 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
@@ -21,7 +21,7 @@ You should assign the result of `(col // 3) * 3` to `col_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /col_start\s*=\s*\(col\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /col_start\s*=\s*\(\s*col\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
index d04774d0553..27da91e101e 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
@@ -22,7 +22,7 @@ You should have `next_empty := self.find_empty_cell()` within the `solver` metho
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\)/);
+assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
index 2c5ce8daf8a..779bc2d47c8 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
@@ -16,7 +16,7 @@ You should have `if (next_empty := self.find_empty_cell()) is None:` withing `so
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /if\s*\(next_empty\s*:=\s*self\.find_empty_cell\(\)\)\s*is\s*None:/)
+assert.match(function_body, /if\s*\(\s*next_empty\s*:=\s*self\.find_empty_cell\(\s*\)\s*\)\s*is\s*None:/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
index 958c916db11..0d4ade5b357 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
@@ -7,7 +7,7 @@ dashedName: step-64
 
 # --description--
 
-If still there are empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive).
+If there are still empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive). Your loop should use the variable named `guess`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have `for guess in range(1,10):` within the `else` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "else");
-assert.match(block_body, /for\s+\w+\s+in\s+range\(1,\s*10\)/);
+assert.match(block_body, /for\s+\w+\s+in\s+range\(\s*1,\s*10\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
index 92664a75d37..afe9a4c2a7f 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] = guess` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*guess/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*guess/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
index 9b8f4124faa..6692f96d633 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
@@ -17,7 +17,7 @@ You should have `self.solver()` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.solver\(\)/);
+assert.match(block_body, /self\.solver\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
index 182d9f001a0..a33379dbd5a 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
@@ -19,7 +19,7 @@ You should have `if self.solver():` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /if\s+self\.solver\(\):/);
+assert.match(block_body, /if\s+self\.solver\(\s*\):/);
 ```
 
 You should have `return True` within `if self.solver():`.
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
index d1e18fd7a98..8a271d07f29 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
@@ -19,7 +19,7 @@ You should have `self.board[row][col] = 0` outside the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*0/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*0/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
index db240ad24f2..e8ca9fe97a1 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
@@ -18,7 +18,7 @@ You should have `gameboard = Board(board)` within the `solve_sudoku` function.
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solve_sudoku");
-assert.match(function_body, /gameboard\s*=\s*Board\(board\)/);
+assert.match(function_body, /gameboard\s*=\s*Board\(\s*board\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
index 0ea67be54f5..5f62115ab67 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
@@ -22,7 +22,7 @@ With this, you are finished with building the sudoku solver!
 Call the `solve_sudoku` method with `puzzle` as input.
 
 ```js
-assert.match(code, /solve_sudoku\(puzzle\)/);
+assert.match(code, /solve_sudoku\(\s*puzzle\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
index 2f4cf11d89b..6719c82e469 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
@@ -37,7 +37,7 @@ You should assign `array[:middle_point]` to the `left_part` variable.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /left_part\s*=\s*array\[:middle_point\]/);
+    assert.match(function_body, /left_part\s*=\s*array\s*\[\s*:\s*middle_point\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
index a59ee908dff..c4132904da7 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
@@ -22,7 +22,7 @@ You should replace `pass` keyword with an `if` statement with this condition: `l
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*pass/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
index dea45d32b3b..3672fa2d757 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
@@ -24,7 +24,7 @@ You should replace `pass` with `array[sorted_index] = left_part[left_array_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*array\[sorted_index\]\s*=\s*left_part\[left_array_index\]\s*(?!.*\bpass\b)/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]\s*(?!.*\bpass\b)/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
index 866e964ae21..4fab1511818 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
@@ -24,7 +24,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /else:\s*[^}]*array\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /else:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
index 03f2da00ad9..d12594feb71 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
@@ -24,7 +24,7 @@ Your `while` loop should have this condition: `left_array_index < len(left_part)
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(left_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):/m);
   }
 })
 ```
@@ -38,7 +38,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
index d8eccb4d120..b9bc2da1c24 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = left_part[left_array_index]` in the body
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ You should not have `pass` in the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
index a851da454c5..79debc4ba96 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `left_array_i
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
index 505e9f85422..6810110eaa6 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
@@ -22,7 +22,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
index 3f833a67fba..3c33eda8cea 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
@@ -22,7 +22,7 @@ Your `while` loop should have this condition: `right_array_index < len(right_par
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(right_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):/m);
   }
 })
 ```
@@ -36,7 +36,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
index 05aa83f2e3f..0b59b97c23e 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
index c02a8c5b32a..f1e6b0428e9 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
@@ -20,7 +20,7 @@ You should have `right_array_index += 1` within the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bright_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bright_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
index fc4dbbf952f..f1143e07e5a 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
index 656a6173922..f78cfd91762 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
@@ -24,7 +24,7 @@ You should create an `if` statement to check if `len(array) <= 1`. Don't forget
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*pass/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
index ca7520fb607..99f01b798d3 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
@@ -20,7 +20,7 @@ You should replace `pass` with a `return` statement in the body of the `if` stat
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*return/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the body of the `if` statement
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
index 3192695aa02..4083e052ef0 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
@@ -21,8 +21,8 @@ You should add `1` to the current value of `left_array_index`.
     const { function_body } = merge_sort;
 
     const allowedMatches = [
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
     ]
 
     const anyMatch = allowedMatches.some((match) => match.test(function_body));
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
index ce0cc0bfe64..ccb613ab7bf 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
@@ -34,7 +34,7 @@ You should assign `array[middle_point:]` to the `right_part` variable
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /right_part\s*=\s*array\[middle_point:\]/);
+    assert.match(function_body, /right_part\s*=\s*array\s*\[\s*middle_point\s*:\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
index 49b60e505cc..92f448cbacc 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
@@ -7,11 +7,11 @@ dashedName: step-2
 
 # --description--
 
-Replace the `pass` statement with a variable named `card_number` and a value of `4111-1111-4555-1142`.
+Replace the `pass` statement with a variable named `card_number` and a value of `'4111-1111-4555-1142'`.
 
 # --hints--
 
-You should have `card_number = "4111-1111-4555-1142"` within the `main` function.
+You should have `card_number = '4111-1111-4555-1142'` within the `main` function.
 
 ```js
 ({
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
index 8968c4269eb..18f8846b8d1 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
@@ -13,7 +13,7 @@ The Luhn algorithm is as follows:
 
 1. From the right to left, double the value of every second digit; if the product is greater than 9, sum the digits of the products.
 2. Take the sum of all the digits.
-3. If the sum of all the digits is a multiple of `10`, then the number is valid; else it is not valid.
+3. If the sum of all the digits is a multiple of 10, then the number is valid; else it is not valid.
 
 Assume an example of an account number "7992739871" that will have a check digit added, making it of the form 7992739871x:
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
index 4759ab3728d..94d5bc95fab 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
@@ -30,7 +30,7 @@ You should have `card_number_reversed = card_number[0:4]` within the `verify_car
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
index 7727ac99c81..b81e3f02ee9 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
@@ -20,7 +20,7 @@ You should have `odd_digits = card_number_reversed[::2]` within the `verify_card
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\[::2\]/);
+        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\s*\[\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
index b3f9d15cfec..4184818a26c 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
@@ -27,7 +27,7 @@ You should have `sum_of_odd_digits += int(digit)` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(digit\)/);
+        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(\s*digit\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
index d516125cb66..73ffd7c1100 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
@@ -20,7 +20,7 @@ You should have `even_digits = card_number_reversed[1::2]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\[1::2\]/);
+        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\s*\[\s*1\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
index 67824671fb2..5d779414174 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
@@ -22,7 +22,7 @@ You should have `number = int(digit) * 2` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /number\s*=\s*int\(digit\)\s*\*\s*2/);
+        assert.match(function_body, /number\s*=\s*int\(\s*digit\s*\)\s*\*\s*2/);
     }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
index 3a2fae8c36a..e61f25b9f05 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
@@ -30,8 +30,8 @@ You should have `number = number // 10 + number % 10` within the `if` statement.
         const verify_card_number = __helpers.python.getBlock("\n" + transformedCode, "if number >= 10");
         const { block_body } = verify_card_number;
         const allowedMatches = [
-            /number *= *\(?number *\/\/ *10\)? *\+ *\(?number *% *10/,
-            /number *= *\(?number *% *10\)? *\+ *\(?number *\/\/ *10/
+            /number *= *\(?\s*number *\/\/ *10\s*\)? *\+ *\(?\s*number *% *10/,
+            /number *= *\(?\s*number *% *10\s*\)? *\+ *\(?\s*number *\/\/ *10/
         ];
 
         const someMatch = allowedMatches.some(allowedMatch => allowedMatch.test(block_body));
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
index 75d81d1ca3f..3bec9488659 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
@@ -7,7 +7,7 @@ dashedName: step-33
 
 # --description--
 
-Adjust the `verify_card_number` call such that if it returns `True`, print `VALID!` to the console. Otherwise, print `INVALID!`.
+Adjust the `verify_card_number` call such that if it returns `True`, print `'VALID!'` to the console. Otherwise, print `'INVALID!'`.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `if verify_card_number(translated_card_number):` within the `mai
 })
 ```
 
-You should have `print("VALID!")` within the `if` statement.
+You should have `print('VALID!')` within the `if` statement.
 
 ```js
 ({
@@ -40,7 +40,7 @@ You should have `print("VALID!")` within the `if` statement.
 })
 ```
 
-You should have `print("INVALID!")` within the `else` clause.
+You should have `print('INVALID!')` within the `else` clause.
 
 ```js
 ({
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
index 90d48a3bcf5..dea1bd605d8 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
@@ -7,7 +7,7 @@ dashedName: step-34
 
 # --description--
 
-Change the value of `card_number` such that `INVALID!` is printed to the console.
+Change the value of `card_number` such that `'INVALID!'` is printed to the console.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
index 820d28f6ce3..b360fb13859 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
@@ -20,7 +20,7 @@ You should have `card_number_reversed = card_number[0:4:2]` within the `verify_c
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4:2\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
index 91ece50db45..19947740dfe 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
@@ -27,7 +27,7 @@ You should have `card_number_reversed = card_number[::-1]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[::-1\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*:\s*:\s*-1\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
index 0d12029ee44..11da41e068b 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
@@ -10,10 +10,10 @@ dashedName: step-4
 A dictionary is another built-in data type in Python. A dictionary is a collection of data in the form of *key*-*value* pairs. Dictionaries are defined with curly braces `{}` and they contain key-value pairs separated by commas. Each key is followed by a colon `:` and the value:
 
 ```py
-{"amount": 50.0, "category": "Food"}
+{'amount': 50.0, 'category': 'Food'}
 ```
 
-In the example above, `amount` and `category` are keys, and `50.0` and `Food` are their the corresponding values.
+In the example above, `amount` and `category` are keys, and `50.0` and `'Food'` are their the corresponding values.
 
 Create a dictionary with a key `amount` and value of the `amount` parameter and pass your new dictionary to the `.append()` call.
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
index 72020abaf17..9d62eec6fcb 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `category` as the key, and the `category` parameter as the value.
+Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `'category'` as the key, and the `category` parameter as the value.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
index de542e792b9..b06cc528b3b 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
@@ -10,11 +10,11 @@ dashedName: step-9
 You can access values in a dictionary through its keys. You need to use the bracket notation and include the key between the square brackets:
 
 ```py
-my_dict = {"amount": 50.0, "category": "Food"}
-my_dict["amount"] # 50.0
+my_dict = {'amount': 50.0, 'category': 'Food'}
+my_dict['amount'] # 50.0
 ```
 
-You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `amount` key and the `category` key in the `expense` dictionary.
+You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `'amount'` key and the `'category'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
index 48d01f9532f..d98269a05d5 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
@@ -13,7 +13,7 @@ Lambda functions are brief, anonymous functions in Python, ideal for simple, one
 lambda x: expr
 ```
 
-In the example above, `x` is a parameter to be use in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
+In the example above, `x` is a parameter to be used in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
index 033553fca64..0683ce66a2e 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `amount` key in the `expense` dictionary.
+Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `'amount'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
index c9a0e5cc400..8fffb1ab6c9 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `category` key of the `expense` dictionary and `category`.
+Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `'category'` key of the `expense` dictionary and `category`.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
index 4e438063d27..5a0142fd006 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
@@ -23,7 +23,7 @@ You should define a function named `main()` without parameters.
 })
 ```
 
-You should move the `expense` list inside the `main()` function body.
+You should move the `expenses` list inside the `main()` function body.
 
 ```js
 ({ test: () => assert(__pyodide.runPython(`
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
index d5a16c82f15..946fbcd0533 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
@@ -14,7 +14,7 @@ while condition:
     <code>
 ```
 
-Below the `expense` list, create a `while` loop. Use `True` for the condition, and print the string `\nExpense Tracker` inside the loop body to show the title of the program.
+Below the `expenses` list, create a `while` loop. Use `True` for the condition, and print the string `'\nExpense Tracker'` inside the loop body to show the title of the program.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
index d8ee4179196..8a8996ac747 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
@@ -9,7 +9,7 @@ dashedName: step-25
 
 The `while` loop you created in the previous step is an infinite loop that will allow the program to continuously present menu options until the user decides to exit.
 
-After the `print()` call, add another one to print the string `1. Add an expense`.
+After the `print()` call, add another one to print the string `'1. Add an expense'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
index 1c5dad82260..55a81d00806 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
@@ -7,7 +7,7 @@ dashedName: step-26
 
 # --description--
 
-Next, add another `print()` call and pass the string `2. List all expenses`.
+Next, add another `print()` call and pass the string `'2. List all expenses'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
index c330193a9a5..25743e4d214 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
@@ -7,7 +7,7 @@ dashedName: step-27
 
 # --description--
 
-Provide the other menu options by printing the following three strings in your `while` loop: `3. Show total expenses`, `4. Filter expenses by category`, and `5. Exit`.
+Provide the other menu options by printing the following three strings in your `while` loop: `'3. Show total expenses'`, `'4. Filter expenses by category'`, and `'5. Exit'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
index 0a61c8bef7d..6a6e7b65fda 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
@@ -9,7 +9,7 @@ dashedName: step-28
 
 The `input()` function takes a user input and it returns the user input in the form of a string.
 
-Inside your `while` loop, call the `input()` function passing the string `Enter your choice:` as the argument, and assign the result to a variable named `choice`.
+Inside your `while` loop, call the `input()` function passing the string `'Enter your choice: '` as the argument, and assign the result to a variable named `choice`.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
index 7f3efd1ee17..750a6ebba2a 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
@@ -7,9 +7,9 @@ dashedName: step-29
 
 # --description--
 
-You are going to use conditional statements to check the user's choice. If the choice is `1`, it means the user wants to add an expense.
+You are going to use conditional statements to check the user's choice. If the choice is `'1'`, it means the user wants to add an expense.
 
-Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `1`. If it's true, it will be the starting point for adding a new expense.
+Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `'1'`. If it's true, it will be the starting point for adding a new expense.
 
 Inside the `if` statement body, declare a variable `amount` and assign it an empty `input()` call.
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
index b4a9832ae99..b22271fdc6e 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
@@ -9,7 +9,7 @@ dashedName: step-30
 
 Inside the `if` statement, you should ask the user to enter the amount for the expense and store it in a variable.
 
-Pass the string `Enter amount:` to your empty `input()` call, so you can store the expense.
+Pass the string `'Enter amount: '` to your empty `input()` call, so you can store the expense.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
index cbacd38d8d0..81f9d0868e1 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
@@ -9,7 +9,7 @@ dashedName: step-34
 
 To list all expenses, you can use an `elif` statement after an `if` statement. The `elif` checks additional conditions and only works following an `if` statement.
 
-Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `\nAll Expenses:`.
+Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `'\nAll Expenses:'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
index 75e797d69a5..1531e711127 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
@@ -9,7 +9,7 @@ dashedName: step-36
 
 To show the total expenses, create an `elif` statement that checks if `choice == '3'`.
 
-If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `\nTotal Expenses:` as the first argument and `total_expenses(expenses)` as the second argument.
+If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `'\nTotal Expenses: '` as the first argument and `total_expenses(expenses)` as the second argument.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
index 3011e8fab38..85c5c04a638 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
@@ -7,9 +7,9 @@ dashedName: step-41
 
 # --description--
 
-To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `5`.
+To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `'5'`.
 
-Inside the new `elif` statement, print the string `Exiting the program.` to show that the program is terminating its execution.
+Inside the new `elif` statement, print the string `'Exiting the program.'` to show that the program is terminating its execution.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `elif choice == '5':` in your code.
 })
 ```
 
-You should print `Exiting the program.` in your new `elif` statement.
+You should print `'Exiting the program.'` in your new `elif` statement.
 
 ```js
 ({ test: () =>
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
index f06904c3aeb..6417805881e 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
@@ -22,7 +22,7 @@ You should replace `pass` with an empty list named `snake_cased_char_list` withi
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\]/);
+        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\s*\]\s*/);
     }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
index e4c7c98339a..a3600e28190 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
@@ -34,7 +34,7 @@ You should use the `.append()` method to add `char` to the `snake_cased_char_lis
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list.append\(char\)/);
+        assert.match(function_body, / +snake_cased_char_list.append\(\s*char\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
index cd2eaf4da99..f1eb0575683 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
@@ -7,11 +7,11 @@ dashedName: step-12
 
 # --description--
 
-Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `aLongAndComplexString` as input to the function and print out the output using the `print()` function.
+Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `'aLongAndComplexString'` as input to the function and print out the output using the `print()` function.
 
 # --hints--
 
-You should call `convert_to_snake_case()` inside the `main()` function and pass `aLongAndComplexString` as input to the function.
+You should call `convert_to_snake_case()` inside the `main()` function and pass `'aLongAndComplexString'` as input to the function.
 
 ```js
 ({
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
index bee886a4f4b..2c4f5e5aae0 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
@@ -7,7 +7,7 @@ dashedName: step-22
 
 # --description--
 
-Finally try out this new implementation by executing the program. Change the input string to `IAmAPascalCasedString` and see if it comes out as `i_am_a_pascal_cased_string`, even though that's a lie.
+Finally try out this new implementation by executing the program. Change the input string to `'IAmAPascalCasedString'` and see if it comes out as `'i_am_a_pascal_cased_string'`, even though that's a lie.
 
 If you've done everything correctly, you should see the input string converted into snake case, like before.
 
@@ -15,7 +15,7 @@ Congratulations! Now your `convert_to_snake_case()` function is ready.
 
 # --hints--
 
-You should change the input string from `aLongAndComplexString` to `IAmAPascalCasedString` inside the `main()` function.
+You should change the input string from `'aLongAndComplexString'` to `'IAmAPascalCasedString'` inside the `main()` function.
 
 ```js
 ({
@@ -24,7 +24,7 @@ You should change the input string from `aLongAndComplexString` to `IAmAPascalCa
         const main = __helpers.python.getDef("\n" + transformedCode, "main");
         const { function_body } = main;
 
-        assert.match(function_body, / +print\(convert_to_snake_case\('IAmAPascalCasedString'\)\)/);
+        assert.match(function_body, / +print\(\s*convert_to_snake_case\(\s*'IAmAPascalCasedString'\s*\)\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
index 6e90ce4373a..7ddedc8fc63 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
@@ -7,9 +7,9 @@ dashedName: step-3
 
 # --description--
 
-The puzzle starts with the disks piled up on the first rod, in decreasing size. You need to populate your first list with numbers representing the various disk sizes.
+The puzzle starts with the disks piled up on the first rod, in decreasing size, with the smallest disk on top and the largest disk on the bottom. You need to populate your first list with numbers representing the various disk sizes.
 
-Instead of adding the items manually to the first list, generate a sequence of numbers from `3` to `1` by using the `range()` function and assign it to `rods['A']`.
+Instead of adding the items manually to the first list, generate a sequence of numbers counting down from `3` to `1` by using the `range()` function and assign it to `rods['A']`. Here, `3` represents the largest disk at the bottom of the pile and `1` represents the smallest disk at the top of the pile.
 
 The syntax is `range(x, y, h)`, where `x` is the starting integer (inclusive), `y` is the last integer (not inclusive), and `h` is the difference between a number and the next one in the sequence.
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
index ece91e20eb4..0e927d9ccda 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
@@ -14,13 +14,13 @@ Now check the data type of your `'A'` key by passing it to the `type()` function
 You should pass your `'A'` key to the `type()` function.
 
 ```js
-({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)/) })
+({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)/) })
 ```
 
 You should print the type of `rods['A']` using the `print()` function.
 
 ```js
-({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)\s*\)/) })
+({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
index 168635784ff..acde5697113 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
@@ -14,7 +14,7 @@ Now that the type is `list` as required, you can remove the `print()` call.
 You should remove `print(type(rods['A']))` from your code.
 
 ```js
-({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
+({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
index 3da7b205c08..8dfcb313cf3 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
@@ -9,7 +9,7 @@ dashedName: step-16
 
 At the end of this project, you will create a recursive solution to the Tower of Hanoi puzzle, but now you are going to explore an iterative approach to this problem.
 
-Start by adding a `for` loop to your function that iterates through the number of moves and prints the current iteration number.
+Start by adding a `for` loop to your function that iterates through the `number_of_moves` and prints the current iteration number.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
index 9837248abb3..b153edd5a90 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `A` and `B` (the source and the auxiliary rods).
+When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `'A'` and `'B'` (the source and the auxiliary rods).
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
index 14c60bdea74..6ad151d2a0d 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
@@ -7,7 +7,7 @@ dashedName: step-21
 
 # --description--
 
-Finally, when the move number divided by 3 has no remainder, the movement is allowed between `B` and `C`.
+Finally, when the move number divided by 3 has no remainder, the movement is allowed between `'B'` and `'C'`.
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
index 8ead6362471..8ccc672c59d 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
@@ -18,10 +18,10 @@ You should have an `elif` statement to check if `rods[source]` is not empty and
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:`);
 assert.match(code, re);
 ```
 
@@ -30,10 +30,10 @@ You should set `forward` to `True` inside your new `elif` statement. You should
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
 assert.match(code, re);
 ```
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
index 18f91bdab5b..5457538ba57 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
@@ -20,7 +20,7 @@ You should add an `if` statement to execute when `forward` is `True` after the `
 You should print the provide string inside your new `if` statement.
 
 ```js
-({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
+({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
index 6a6782257e4..92019d7d3d7 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
@@ -14,13 +14,13 @@ After printing the move, you need to remove the last element from the source rod
 You should remove the last element from `rods[source]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[target].append(rods[source].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
index 410ece943d6..350062ec5cc 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
@@ -14,25 +14,25 @@ When `forward` is `False`, the disk has to be moved in the opposite direction. W
 You should have an `else` clause to move the disks in the opposite direction.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
 ```
 
 You should have `print(f'Moving disk {rods[target][-1]} from {target} to {source}')` inside your `else` clause.
 
 ```js
-({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
+({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
 ```
 
 You should remove the last element from `rods[target]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[source].append(rods[target].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
index 2c55f94f187..4e38fec12c4 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
@@ -14,13 +14,13 @@ Outside the `else` block, add a comment saying `display our progress` and print
 You should use the provided text to add a comment outside the `else` block.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
 ```
 
 You should print the `rods` object outside the `else` block, after the comment.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
index f6e7aff1825..40fa6a47119 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
@@ -15,7 +15,7 @@ You should move the code nested inside the first `if` statement (except the firs
 
 ```js
 ({ test: () => {
-  assert.match(code, /def\s+make_allowed_move\(rod1, rod2\):\s+forward\s+=\s+False\s+if\s+not\s+rods\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\[\s*source\s*\]\s+and\s+rods\[\s*source\s*\]\[-1\]\s<\srods\[\s*target\s*\]\[\s*-\s*1\s*\]:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\[\s*source\s*\].append\(\s*rods\[\s*target\s*\].pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+\print\(\s*rods\s*\)/);
+  assert.match(code, /def\s+make_allowed_move\(\s*rod1, rod2\s*\):\s+forward\s+=\s+False\s+if\s+not\s+rods\s*\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\s*\[\s*source\s*\]\s+and\s+rods\s*\[\s*source\s*\]\s*\[\s*-1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\s*\[\s*source\s*\]\s*\.append\(\s*rods\s*\[\s*target\s*\]\s*\.pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\(\s*rods\s*\)/);
   }
 })
 ```
@@ -47,7 +47,7 @@ def move(n, source, auxiliary, target):
             if not rods[target]:
                 forward = True
             elif rods[source] and rods[source][-1] < rods[target][-1]:
-                forward = True              
+                forward = True
             if forward:
                 print(f'Moving disk {rods[source][-1]} from {source} to {target}')
                 rods[target].append(rods[source].pop())
@@ -57,7 +57,7 @@ def move(n, source, auxiliary, target):
 
             # display our progress
             print(rods)
---fcc-editable-region--            
+--fcc-editable-region--
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
         elif remainder == 0:
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
index 20e4d08ec2d..58640338727 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
@@ -15,11 +15,11 @@ You should change each occurrence of `source` inside the `make_allowed_move()` f
 
 ```js
 ({ test: () => {
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
index 982e3222eb0..b739b77d8b1 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
@@ -16,11 +16,11 @@ You should change each occurrence of `target` inside `make_allowed_move` into `r
 ```js
 ({ test: () => {
   assert.match(code, /if\s+not\s+rods\s*\[\s*rod2\s*\]\s*:/);
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\[\s*rod2\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*rod2\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\s*\[\s*rod2\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod2\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
index 3239df345b3..a7d0e08625e 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
@@ -11,7 +11,7 @@ It looks like it's working! But the output is not very readable. Print a new lin
 
 # --hints--
 
-You should pass a string with a new line character (`\n`) as the second argument for your two `print(rods)` calls.
+You should pass a string with a new line character (`'\n'`) as the second argument for your two `print(rods)` calls.
 
 ```js
 ({ test: () => assert.match(code, /print\(\s*rods\s*,\s*('|")\\n\1\s*\)(?=.*print\(\s*rods\s*,\s*('|")\\n\2\s*\))/s) })
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
index 5b27fd6dd5b..3ccee00a3c0 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
@@ -16,7 +16,7 @@ For now, each recursive call prints the `rods` dictionary without performing any
 You should remove the last element from the `rods[source]` list and append it to the `rods[target]` list before the `print` call.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
index 00dd7178b40..2a64d59e481 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
@@ -14,7 +14,7 @@ Before appending the last element to the target, add a comment saying `move the
 You should add a comment with the provided text before `rods[target].append(rods[source].pop())`.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\))/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
index 63445fd30c8..de3b5cc4bb8 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Although recursion could sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
+Although recursion can sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
 
 Set `NUMBER_OF_DISKS` to `5` and check the output.
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
index 313ce9d7ed2..dff4232e064 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
@@ -21,7 +21,7 @@ You should delete the last three lines in your code.
 ({ test: () => {
   assert.isFalse(/pattern\s*=\s*r("|')\\W\1/.test(code));
   assert.isFalse(/quote\s*=\s*("|')_\1/.test(code));
-  assert.isFalse(/print\(re\.findall\(pattern, quote\)\)/.test(code));
+  assert.isFalse(/print\(\s*re\.findall\(\s*pattern, quote\s*\)\s*\)/.test(code));
 }})
 ```
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
index 3d1f6e48887..a2910949b5e 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
@@ -14,7 +14,7 @@ Now, turn the empty string in the constraint tuple into a regex pattern to match
 You should have the `(nums, '[0123456789]')` tuple in your `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
+({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
index 6b4fdd48ffc..7d38091e95d 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
@@ -27,7 +27,7 @@ You should replace your existing `for` loop and two `if` statements with a singl
 Your new `if` condition should be a list comprehension that is the result of evaluating the expression `constraint <= len(re.findall(pattern, password))` for each `constraint`-`pattern` tuple in the `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /^(\s{8})if\s+\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
+({ test: () => assert.match(code, /^(\s{8})if\s*\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
index 5a7a8e606dd..1369caec318 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
@@ -1,6 +1,6 @@
 ---
 id: 6551ecf597038c36637f3759
-title: Step 1
+title: ステップ 1
 challengeType: 20
 dashedName: step-1
 ---
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
index 2e6d119b78b..6237636ef55 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
@@ -1,6 +1,6 @@
 ---
 id: 6551eebe6cbb2e6cadf9b468
-title: Step 2
+title: ステップ 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -15,7 +15,7 @@ string_2 = 'I am also a string'
 string_3 = 'This is not valid"
 ```
 
-Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `Hello World` to this variable.
+Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `'Hello World'` to this variable.
 
 # --hints--
 
@@ -32,7 +32,7 @@ You should declare a variable called `text`. Pay attention to place the variable
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello World` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
+You should assign the string `'Hello World'` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello World\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
index d40877ed6af..2b65b4b4212 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
@@ -14,7 +14,7 @@ greet = 'Hello!'
 print(greet)
 ```
 
-The code in the example above would print the string `Hello!`, which is the value of the variable `greet` passed to `print()` as the argument.
+The code in the example above would print the string `'Hello!'`, which is the value of the variable `greet` passed to `print()` as the argument.
 
 Print your `text` variable to the screen by passing the `text` variable as the argument to the `print()` function.
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
index 86104aff4f6..7c28d74b6b7 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `Hello World`, `H` is at index `0`, `e` is at index `1`, and so on. 
+Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `'Hello World'`, `'H'` is at index `0`, `'e'` is at index `1`, and so on.
 
 Each character of a string can be accessed by using bracket notation. You need to write the variable name followed by square brackets and add the index of the character between the brackets:
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
index 5d0ae1dd2fa..3103cb653bf 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-You can see `11` printed on the terminal because `Hello World` contains 11 characters.
+You can see `11` printed on the terminal because `'Hello World'` contains 11 characters.
 
 Another useful built-in function is `type()`, which returns the data type of a variable. Modify your `print()` call to print the data type of `text`.
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
index cedb112a823..074c15b2e19 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
@@ -14,7 +14,7 @@ Key aspects of variable naming in Python are:
 - Variable names are case sensitive, i.e. `my_var` is different from `my_Var` and `MY_VAR`.
 - Finally, it is a common convention to write variable names using `snake_case`, where each space is replaced by an underscore character and the words are written in lowercase letters.
 
-Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `abcdefghijklmnopqrstuvwxyz` to this variable.
+Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `'abcdefghijklmnopqrstuvwxyz'` to this variable.
 
 # --hints--
 
@@ -38,7 +38,7 @@ You should declare a variable called `alphabet`. Pay attention to place the vari
 assert.match(code, /^alphabet\s*=/m)
 ```
 
-You should assign the string `abcdefghijklmnopqrstuvwxyz` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
+You should assign the string `'abcdefghijklmnopqrstuvwxyz'` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
 
 ```js
 assert.match(code, /^alphabet\s*=\s*("|')abcdefghijklmnopqrstuvwxyz\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
index abe8ced263d..5c272b6d6f1 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
@@ -15,7 +15,7 @@ Start by finding the position of the first letter in the string. One way is to c
 text.find('W')
 ```
 
-Above, uppercase `W` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `W` character inside the string stored in the `text` variable.
+Above, uppercase `'W'` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `'W'` character inside the string stored in the `text` variable.
 
 At the end of your code, call `.find()` on your `alphabet` string and pass `text[0]` to the method. Note that a method is just a function that belongs to an object (you will learn more about that in another project).
 
@@ -36,7 +36,7 @@ assert.match(code, /alphabet\.find\s*\(.*\)/)
 You should call the `.find()` method on the `alphabet` variable and pass `text[0]` to the method. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)/m)
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 412619ccc4c..3e3af82109c 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -22,7 +22,7 @@ assert.match(code, /^index\s*=/m)
 You should assign the value returned by `alphabet.find(text[0])` to your `index` variable.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 34166fe3da4..83feddb9318 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `H`, is not found, since `alphabet` contains only lowercase letters.
+`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `'H'`, is not found, since `alphabet` contains only lowercase letters.
 
 You can transform a string into its lowercase equivalent with the `.lower()` method. Add another `print()` call to print `text.lower()` and see the output.
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index 54d47cf3f49..9a554ddeef1 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -27,7 +27,7 @@ assert.match(code, /^print\s*\(\s*index\s*\)/m);
 You should update your `alphabet.find(text[0])` call to use `text[0].lower()` as the argument. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index 95e2567fa84..e4c0036ebff 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-As you can see from the output, `h` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
+As you can see from the output, `'h'` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
 
 Modify your `shifted` variable so that it stores the value of `alphabet` at index `index + shift`.
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index 41811515713..a8da79ffd22 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -35,14 +35,14 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i/m)
 ```
 
-You should write the `in` keyword after `for i `. Make sure to leave a space around the `in` keyword.
+You should write the `in` keyword after `for i`. Make sure to leave a space around the `in` keyword.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i\s+in\s+/m)
 ```
 
-You should write `text` after `for i in `. Don't forget to add the final `:`.
+You should write `text` after `for i in`. Don't forget to add the final `:`.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index b7051de41c3..bdf47ed7c6f 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -7,7 +7,7 @@ dashedName: step-42
 
 # --description--
 
-Currently, spaces get encrypted as `c`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
+Currently, spaces get encrypted as `'c'`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
 
 ```py
 if x != 0:
@@ -16,7 +16,7 @@ if x != 0:
 
 In the example above, the condition of the `if` statement is `x != 0`. The code `print(x)`, inside the `if` statement body, runs only when the condition evaluates to `True` (in this example, meaning that `x` is different from zero).
 
-At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `space!`. Remember to indent this line.
+At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `'space!'`. Remember to indent this line.
 
 # --hints--
 
@@ -36,7 +36,7 @@ const {block_body} = __helpers.python.getBlock(commentless_code, /for\s+char\s+i
 assert(block_body.match(/if\s+char\s*==\s*("|')\s\1\s*:/));
 ```
 
-You should print the string `space!` inside your new `if` statement.
+You should print the string `'space!'` inside your new `if` statement.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index 69191130521..f3fc108e506 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, instead of printing `space!`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
+Now, instead of printing `'space!'`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index dfc91239b0e..f6ea23b4325 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Try to assign the string `Hello Zaira` to your `text` variable and see what happens in the console.
+Try to assign the string `'Hello Zaira'` to your `text` variable and see what happens in the console.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have a `text` variable.
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello Zaira` to your `text` variable.
+You should assign the string `'Hello Zaira'` to your `text` variable.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello\sZaira\1/m)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index 5629c8d00fb..b5f4088d3b7 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -7,7 +7,7 @@ dashedName: step-58
 
 # --description--
 
-Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `python` to this variable.
+Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `'python'` to this variable.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should declare a variable called `custom_key`.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should assign the string `python` to your `custom_key` variable.
+You should assign the string `'python'` to your `custom_key` variable.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "python") })
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 179f7313a5d..47211f5e8bc 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -7,8 +7,7 @@ dashedName: step-59
 
 # --description--
 
-Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text.
-At the beginning of your function body, declare a `key_index` variable and set it to zero.
+Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text. At the beginning of your function body, declare a `key_index` variable and set it to zero.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 660fb4ab263..7e452e05438 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
 
     for char in message.lower():
 --fcc-editable-region--
-        
+
         if char == ' ':
             encrypted_text += char
 --fcc-editable-region--            
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7727f6c57a8..7ca155b0c73 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -7,8 +7,7 @@ dashedName: step-62
 
 # --description--
 
-You will need to increase the `key_index` count for the next iteration.
-To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
+You will need to increase the `key_index` count for the next iteration. To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index 67567e88cdf..a6cd4a9a348 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
         if char == ' ':
             encrypted_text += char
         else:
-            
+
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index da202c1490a..7ca3ec197c0 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -50,7 +50,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key):
             # Find the right key character to encode
             key_char = key[key_index % len(key)]
             key_index += 1
-            
+
 --fcc-editable-region--            
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index 7ca7c2f323a..f783cbf3472 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -32,7 +32,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -41,7 +41,7 @@ def vigenere(message, key):
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
-            
+
             offset = alphabet.index(key_char)
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index a371865b1ef..28c793c06c3 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -55,7 +55,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index 60289b5525e..acf5b0f71c8 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -43,7 +43,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -57,7 +57,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index b1f7c3a5caa..87f8a5aa7f3 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -31,7 +31,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 534ff69ec91..84f3a8477e1 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -46,7 +46,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -60,9 +60,9 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 --fcc-editable-region--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index 3dfdd998a92..d29b009f3cf 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -47,9 +47,9 @@ def vigenere(message, key, direction):
             new_index = (index + offset) % len(alphabet)
 --fcc-editable-region--
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 #encryption = vigenere(text, custom_key)
 #print(encryption)
 ```
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 330871bc52a..9f1ea94390c 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,9 +45,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 --fcc-editable-region--
 #encryption = vigenere(text, custom_key)
 #print(encryption)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index db2c5bdfe33..adf869e6b5f 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index b4b329858a2..8e744b4c09f 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index f49b76f417f..cd7e9ce3a58 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -39,7 +39,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -53,7 +53,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index b295655e5c6..a6ecf2194d0 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -38,7 +38,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -52,9 +52,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index 521f1f961d3..d77bcd5d985 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -19,7 +19,7 @@ You should have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should be equal to the string `Hello Zaira!`.
+Your `text` variable should be equal to the string `'Hello Zaira!'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "Hello Zaira!") })
@@ -40,7 +40,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -54,9 +54,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index f9dfeed2c7d..a60afdc14cc 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -53,9 +53,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index fa8531f3421..40bfdb53982 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -48,9 +48,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index aba2d5665d2..822b22f2743 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -46,9 +46,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index a8a4a146373..82df5c7e409 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -70,7 +70,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index 900a42440bf..ceda0450cc8 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -51,7 +51,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index b37f689c14a..c0d946a1d38 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index d863b1b5667..e86470c6c34 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -51,15 +51,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index e7e001fd7b2..cb2c9d5e191 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -9,7 +9,7 @@ dashedName: step-86
 
 It works! Now, you are going to start with an encrypted message to be decrypted.
 
-Change the value of `text` to the string `mrttaqrhknsw ih puggrur`.
+Change the value of `text` to the string `'mrttaqrhknsw ih puggrur'`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should still have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should have the value of `mrttaqrhknsw ih puggrur`.
+Your `text` variable should have the value of `'mrttaqrhknsw ih puggrur'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "mrttaqrhknsw ih puggrur") })
@@ -54,15 +54,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = encrypt(text, custom_key)
 print(encryption)
 decryption = decrypt(encryption, custom_key)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index 7295239a2e5..a2e43552133 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -46,7 +46,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -60,9 +60,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 582c138e1b3..3cfffa05b63 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index 43650a129a7..b809b6cc227 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -9,11 +9,11 @@ dashedName: step-88
 
 Two or more strings can be concatenated by using the `+` operator. For example: `'Hello' + ' there!'` results in `'Hello there!`.
 
-Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `Encrypted text: `. Pay attention to the spacing.
+Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `'Encrypted text: '`. Pay attention to the spacing.
 
 # --hints--
 
-You should call `print()` and pass `'Encrypted text: ' + text` as the arguments. 
+You should call `print()` and pass `'Encrypted text: ' + text` as the arguments.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--    
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index 68b96128144..bb3bf128cf9 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -7,11 +7,11 @@ dashedName: step-89
 
 # --description--
 
-Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 # --hints--
 
-You should have a `print()` call that prints `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+You should have a `print()` call that prints `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -52,12 +52,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index e52496dd150..6d5c9a3c856 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -7,7 +7,7 @@ dashedName: step-90
 
 # --description--
 
-In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings. 
+In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings.
 
 Interpolation means writing placeholders that will be replaced by the specified values when the program runs. For example, you can get the same result of `'Encrypted text: ' + text` with `f'Encrypted text: {text}'`. You need to put an `f` before the quotes to create the f-string and write the variables or expressions you want to interpolate between curly braces.
 
@@ -49,12 +49,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index ebdb8b79456..4e28d4737fc 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index 8e107b0fff4..d55577ba1cf 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -47,12 +47,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 0f916bf649e..073dfdcd2bb 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -50,12 +50,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 23af806c5ce..006a04850ea 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -7,7 +7,7 @@ dashedName: step-95
 
 # --description--
 
-Wait a minute! You cannot decrypt anything with the wrong key. Try with `happycoding`.
+Wait a minute! You cannot decrypt anything with the wrong key. Try with `'happycoding'`.
 
 With that, your cipher project is complete.
 
@@ -19,7 +19,7 @@ You should still have a `custom_key` variable.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should modify the `custom_key` value into `happycoding`.
+You should modify the `custom_key` value into `'happycoding'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "happycoding") })
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
@@ -96,12 +96,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 05c44517e6f..9a4c27f1945 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -7,8 +7,7 @@ dashedName: step-41
 
 # --description--
 
-Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare.
-They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
+Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare. They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
 
 Python has the following comparison operators:
 
@@ -47,11 +46,11 @@ Python has the following comparison operators:
   </tbody>
 </table>
 
-At the beginning of your loop body, print the result of comparing `char` with an empty space (`' '`). Use the equality operator `==` for that.
+At the beginning of your loop body, print the result of comparing `char` with a space (`' '`). Use the equality operator `==` for that.
 
 # --hints--
 
-You should compare `char` with an empty space using the equality operator inside your `for` loop.
+You should compare `char` with a space using the equality operator inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -62,7 +61,7 @@ You should compare `char` with an empty space using the equality operator inside
 })
 ```
 
-You should print the result of comparing `char` with an empty space inside your `for` loop.
+You should print the result of comparing `char` with a space inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -73,7 +72,7 @@ You should print the result of comparing `char` with an empty space inside your
 })
 ```
 
-You should print the result of comparing `char` with an empty space at the beginning of your loop.
+You should print the result of comparing `char` with a space at the beginning of your loop.
 
 ```js
 ({ test: () => {
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 34e53a7cc4f..86a5a8baa9a 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -18,7 +18,7 @@ Give your `for` loop a body by adding a call to `print(i)`. Remember to indent t
 
 # --hints--
 
-You should add `print(i)` to your `for` loop body. Pay attention to the indentation. 
+You should add `print(i)` to your `for` loop body. Pay attention to the indentation.
 
 ```js
 assert.match(code, /^for\s+i\s+in\s+text:\s+print\s*\(\s*i\s*\)/m)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index e7886b5f796..042349ee0a4 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -15,7 +15,7 @@ Restore the indentation for your `print(i)` call.
 
 # --hints--
 
-You should indent `print(i)` inside your `for` loop body. 
+You should indent `print(i)` inside your `for` loop body.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index 6215b77a724..f971dfe2276 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -13,7 +13,7 @@ Rename your `i` variable to `char`.
 
 # --hints--
 
-You should replace `i` with `char`. 
+You should replace `i` with `char`.
 
 ```js
 assert.match(code, /^for\s+char\s+in\s+text:\s+print\s*\(\s*char\s*\)/m)
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index b2203350e08..97fee73da43 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -7,7 +7,7 @@ dashedName: step-31
 
 # --description--
 
-Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `train`, but this is not valid:
+Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `'train'`, but this is not valid:
 
 ```py
 my_string = 'brain'
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index 39784236282..e2b04ef618e 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -14,7 +14,7 @@ message = 'Hello World'
 message = 'Hello there!'
 ```
 
-Delete the `text[0]` line and reassign `text` the string `Albatross`.
+Delete the `text[0]` line and reassign `text` the string `'Albatross'`.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*\[\s*0\s*\]\s*\=\s*("|')\w\1/.test(commentless_code));
 ```
 
-You should reassign `text` the string `Albatross`. Do not modify `text = 'Hello World'`.
+You should reassign `text` the string `'Albatross'`. Do not modify `text = 'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 076a71f8786..6b04513e34d 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -20,7 +20,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*=\s*("|')Albatross\1/.test(commentless_code))
 ```
 
-You should still have a `text` variable with the value `Hello World`.
+You should still have a `text` variable with the value `'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index 442d9c6cb33..a98c25c7099 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index 71e999219ba..d239d653b25 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
index e5b84eb5464..f3522faceb6 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
@@ -16,13 +16,13 @@ Delete `pass` and recursively call the `_insert` method on the left child of the
 You should call the `self._insert` method passing `node.left` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the `left` attribute of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
index af1e618d59a..9adc2e676aa 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
@@ -14,13 +14,13 @@ Inside your `elif` clause, replace `pass` with a call to the `_insert` method on
 You should call the `self._insert()` method passing `node.right` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the right attribute (`node.right`) of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
index b1dd775eb38..5ac066b61b4 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
@@ -25,7 +25,7 @@ You should call the `_search` method within the `search` method.
 You should call the `_search` method passing `self.root` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
index 8a9f0b1fa6f..bceb42b5a8b 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
@@ -14,7 +14,7 @@ Now, make the `search` method return the result of the `_search()` call.
 You should prepend the `return` statement to your `_search()` call.
 
 ```js
-({ test: () => assert.match(code, /return\s+self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /return\s+self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
index f6a9b0ee59e..f0348d34236 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
@@ -22,8 +22,8 @@ assert.match(after_split, /if\s+key\s+<\s+node\.key/);
 
 You should return `self._search(node.left, key)` from your new `if` block.
 
-```js    
-({ test: () => assert.match(code, /return\s+self\._search\(node\.left,\s*key\)/) });    
+```js
+({ test: () => assert.match(code, /return\s+self\._search\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
index 9f5eb2a8ce4..808db7f39e2 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
@@ -25,14 +25,14 @@ assert.match(after_split, /self\._search/);
 You should pass two arguments to the call of the `_search` method: `node.right` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should return the result of the `_search` method call.
 
 ```js
 ({
-  test: () => assert.match(code, /return\s+self\._search\(node\.right,\s*key\)/)
+  test: () => assert.match(code, /return\s+self\._search\(\s*node\.right,\s*key\s*\)/)
 });
 ```
 
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
index 8f8f4200eb7..f5ea0f01027 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
@@ -18,7 +18,7 @@ Within the `BinarySearchTree` class, define a `delete` method. It takes two para
 You should define a `delete` method with two parameters: `self` and `key`. Remember to use `pass`.
 
 ```js
-({ test: () => assert.match(code, /def\s+delete\(self,\s*key\)/) });
+({ test: () => assert.match(code, /def\s+delete\(\s*self,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
index 19f887adf21..996afd32338 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
@@ -14,7 +14,7 @@ Inside the `delete` method, delete `pass` and call the private helper method `_d
 Your `delete` method should call the `_delete` method with two arguments: `self.root` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
index fd0c3363320..11826df0772 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
@@ -16,7 +16,7 @@ To handle this case, assign the result of the `_delete` call to `self.root`.
 You should assign the result of the `_delete()` call to `self.root`.
 
 ```js
-({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
index e00460128e6..2fa10aa4811 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
@@ -14,7 +14,7 @@ Inside the `BinarySearchTree` class, define a new helper method called `_delete`
 You should define the `_delete` method inside the `BinarySearchTree` class with the parameters `self`, `node` and `key`. Remember to use the `pass` keyword.
 
 ```js
-assert.match(code, /def\s+_delete\(self,\s*node,\s*key\)/);
+assert.match(code, /def\s+_delete\(\s*self,\s*node,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
index 47a39723a81..de91d39a493 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
@@ -14,13 +14,13 @@ Within the `if` block, replace `pass` with a call to the `_delete` method, passi
 You should call the `_delete` method with `node.left` and the `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to the left child (`node.left`) of the current node.
 
 ```js
-assert.match(code, /node\.left\s*=\s*self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /node\.left\s*=\s*self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
index 229886e31a2..c9553854a87 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
@@ -23,13 +23,13 @@ assert.match(after_split, /elif\s+key\s+>\s+node\.key/);
 You should call the `_delete` method with `node.right` and `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to `node.right`.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
index cdce326e07c..73c8a49c4a8 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
@@ -20,7 +20,7 @@ For now, add a `_min_value` call after your `elif` block, passing `node.right` a
 You should assign `self._min_value(node.right)` to `node.key` after your `elif` block.
 
 ```js
-assert.match(code, /node\.key\s*=\s*self\._min_value\(node\.right\)/);
+assert.match(code, /node\.key\s*=\s*self\._min_value\(\s*node\.right\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
index 81685544e12..2d92ce7c912 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
@@ -22,7 +22,7 @@ assert.match(code, /self\._delete\(\s*node\.right\s*,\s*node\.key\s*/);
 You should assign the return value of the `_delete()` call to the right child of the current node.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right\,\s*node\.key/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right\,\s*node\.key/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
index 6de58b924f6..1779f4a4242 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
@@ -16,7 +16,7 @@ This will start the traversal from the root of the binary search tree (`self.roo
 You should call `_inorder_traversal` and pass `self.root` and `result` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._inorder_traversal\(self\.root,\s*result\)/) })
+({ test: () => assert.match(code, /self\._inorder_traversal\(\s*self\.root,\s*result\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
index 9d3e3c6b8e0..7e047e168a9 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
@@ -14,7 +14,7 @@ Define the `_inorder_traversal` method and give it three parameters: `self`, `no
 You should define a method `_inorder_traversal` that takes three parameters: `self`, `node`, and `result`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+_inorder_traversal\(self,\s*node,\s*result\)/);
+assert.match(code, /def\s+_inorder_traversal\(\s*self,\s*node,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
index bbfd98b9741..8cbc65396ba 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
@@ -20,7 +20,7 @@ assert.match(code, /if\s+node:/);
 You should call `_inorder_traversal` on the `node.left` inside the `if` block.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.left\s*,\s*result\s*\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.left\s*,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
index af5f7671bef..540a075f546 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
@@ -14,7 +14,7 @@ Still inside the `if` block, append the `key` of the current node to the `result
 You should append `node.key` to the `result` list.
 
 ```js
-assert.match(code, /result\.append\(node\.key\)/);
+assert.match(code, /result\.append\(\s*node\.key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
index 69a70769a11..b9bc3e0326b 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
@@ -16,13 +16,13 @@ Create an instance of the `BinarySearchTree` class and assign it to the variable
 You should create an instance of the `BinarySearchTree` class.
 
 ```js
-assert.match(code, /BinarySearchTree\(\)/);
+assert.match(code, /BinarySearchTree\(\s*\)/);
 ```
 
 You should assign the new instance of `BinarySearchTree` to the variable `bst`.
 
 ```js
-assert.match(code, /bst\s*=\s*BinarySearchTree\(\)/);
+assert.match(code, /bst\s*=\s*BinarySearchTree\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
index bf502617c1e..af27d54060e 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
@@ -20,7 +20,7 @@ assert.match(code, /nodes/);
 Your `node` variable should have the value `[50, 30, 20, 40, 70, 60, 80]`.
 
 ```js
-assert.match(code, /nodes\s*=\s*\[50,\s*30,\s*20,\s*40,\s*70,\s*60,\s*80\]/);
+assert.match(code, /nodes\s*=\s*\[\s*50\s*,\s*30\s*,\s*20\s*,\s*40\s*\s*,\s*70\s*,\s*60\s*,\s*80\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
index 3af06622b9c..7d894d542f6 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
@@ -16,7 +16,7 @@ This recursive call explores the entire right subtree in an in-order manner.
 You should call `_inorder_traversal` passing `node.right` and `result` as the arguments.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.right,\s*result\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.right,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
index 83c53a38c51..18b9f887452 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
@@ -16,7 +16,7 @@ To change that to print a useful value, define another method named `__str__` in
 You should define a method `__str__` that takes a single argument `self`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+__str__\(self\)/);
+assert.match(code, /def\s+__str__\(\s*self\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
index 4db3d038b51..baae5ed2958 100644
--- a/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
+++ b/curriculum/challenges/japanese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
@@ -14,7 +14,7 @@ In the body of the `__str__` method, delete `pass` and return the result of call
 You should return the string value of `self.key` from your `__str__` method.
 
 ```js
-({ test: () => assert.match(code, /^\s{8}return\s+str\(self\.key\)/m) })
+({ test: () => assert.match(code, /^\s{8}return\s+str\(\s*self\.key\s*\)/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md b/curriculum/challenges/japanese/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
index d93e64a9be0..06eeee5b0b2 100644
--- a/curriculum/challenges/japanese/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
+++ b/curriculum/challenges/japanese/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
@@ -13,16 +13,12 @@ Lastly change the text color of the `terms and conditions` link element to `#dfd
 
 # --hints--
 
-`a` 要素セレクターを使用する必要があります。
-
-```js
-assert.exists(new __helpers.CSSHelp(document).getStyle('a'));
-```
 
 `a` 要素の `color` を `#dfdfe2` に設定する必要があります。
 
 ```js
-assert.equal(new __helpers.CSSHelp(document).getStyle('a')?.color, 'rgb(223, 223, 226)');
+const linkElement = document.querySelector("a");
+assert.equal(window.getComputedStyle(linkElement)?.color, 'rgb(223, 223, 226)');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
index 09412cc3a31..0ea718d968a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
@@ -10,11 +10,9 @@ dashedName: build-a-cash-register
 
 Here you'll build a cash register app that will return change to the customer based on the price of the item, the amount of cash provided by the customer, and the amount of cash in the cash drawer. You'll also need to show different messages to the user in different scenarios, such as when the customer provides too little cash or when the cash drawer doesn't have enough to issue the correct change.
 
-There are a few variables you'll need to use in your code:
+In the `script.js` file, you have been provided with the `price` and `cid` variables. The `price` variable is the price of the item, and the `cid` variable is the cash-in-drawer, which is a 2D array listing the available currency in the cash drawer.
 
-- `price`: the price of the item as a floating point number.
-- `cash`: the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
-- `cid`: cash-in-drawer, a 2D array listing available currency in the cash drawer.
+The other variable you will need add is the `cash` variable, which is the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
 
 If you'd like to test your application with different values for `price` and `cid`, make sure to declare them with the `let` keyword so they can be reassigned by our tests.
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
index 1e8bcd52231..5cac9632f9b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
@@ -28,10 +28,10 @@ In this project, you'll build an app that will search for Pokémon by name or ID
 1. You should have an element with an `id` of `special-defense`
 1. You should have an element with an `id` of `speed`
 1. When the `#search-input` element contains the value `Red` and the `#search-button` element is clicked, an alert should appear with the text `Pokémon not found`
-1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
+1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the `#types` element should contain a single inner element with the value `ELECTRIC`. The `#types` element content should be cleared between searches
-1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
+1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed`elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the `#types` element should contain two inner elements with the text values `GHOST` and `POISON`, respectively. The `#types` element content should be cleared between searches
 
@@ -158,7 +158,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
+When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
 
 ```js
 async () => {
@@ -251,7 +251,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
+When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
 
 ```js
 async () => {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
index 83c39dfe47f..be9974d7f7e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
@@ -11,7 +11,7 @@ Now that you have the value of the input, you need to split it into an array of
 
 The `.split()` method takes a string and splits it into an array of strings. You can pass it a string of characters or a RegEx to use as a separator. For example, `string.split(",")` would split the string at each comma and return an array of strings.
 
-Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces seperating your values. Store the array in an `array` variable.
+Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces separating your values. Store the array in an `array` variable.
 
 # --hints--
 
@@ -36,7 +36,7 @@ assert.match(code.toString(),  /array\s*=\s*value\.split()/);
 You should use `/,\s*/g` for the `split()` method's separator.
 
 ```js
-assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\)/);
+assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
index 79efd11e2f6..797f67b6d1c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
@@ -22,7 +22,7 @@ assert.match(calculate.toString(), /numbers/);
 You should use the `.map()` method on your `array` variable.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\)/);
+assert.match(calculate.toString(), /array\.map\(\s*\)/);
 ```
 
 You should assign the result of your `.map()` call to your `numbers` variable.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
index c6e423add21..fa7a472ae10 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
@@ -24,7 +24,7 @@ Add a callback function to your `.map()` method that converts each element to a
 Your `.map()` method should have a callback function which takes an `el` parameter.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use the `Number` constructor to convert `el` to a number.
@@ -42,7 +42,7 @@ assert.notMatch(calculate.toString(), /new/);
 Your callback function should return the element converted to a number.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
index 8fd20b8f2c5..31d5cc49413 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
@@ -24,13 +24,13 @@ assert.match(calculate.toString(), /filtered/);
 Your `calculate` function should use the `.filter()` method on the `numbers` array.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\)/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*\)/)
 ```
 
 You should assign the result of `numbers.filter()` to the `filtered` variable.
 
 ```js
-assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\)/);
+assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
index bc2f0dd7342..9bbea45f521 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
@@ -26,7 +26,7 @@ Add a callback function to your `.filter()` method that returns `true` if the el
 Your `.filter()` method should have a callback which accepts `el` as a parameter.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use `!` and `isNaN()` to check if `el` is NOT `NaN`.
@@ -38,7 +38,7 @@ assert.match(calculate.toString(), /!\s*(Number\.)?isNaN\(\s*el\s*\)/);
 Your callback function should return elements that are not `NaN`.
 
 ```js
-assert.match(calculate.toString(), /(numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
index 811d2ee0079..738b547c0a1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
@@ -28,20 +28,19 @@ assert.notMatch(calculate.toString(), /filtered/);
 You should chain your `.filter()` call to your `.map()` call.
 
 ```js
-console.log(calculate.toString());
 assert.match(calculate.toString(), /array\.map\(.*\)\.filter\(/s);
 ```
 
 You should not remove the `.map()` callback.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 You should not remove the `.filter()` callback.
 
 ```js
-assert.match(calculate.toString(), /(\.filter\(\(?\s*el\s*\)?\s*=>|\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
+assert.match(calculate.toString(), /(\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
index 7c0a447b6cc..2cc8f0fad7d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
@@ -22,13 +22,13 @@ assert.match(getMean.toString(), /sum/);
 Your `getMean` function should use the `.reduce()` method of the `array` parameter.
 
 ```js
-assert.match(getMean.toString(), /array\.reduce\(\)/);
+assert.match(getMean.toString(), /array\.reduce\(\s*\)/);
 ```
 
 You should assign the result of `array.reduce()` to the `sum` variable.
 
 ```js
-assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\)/);
+assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
index 0b22c85ca6a..a2575abeba3 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
@@ -22,13 +22,13 @@ For your `sum` variable, pass a callback to `.reduce()` that takes the accumulat
 Your `reduce` method should have a callback function which takes an `acc` and an `el` parameters.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)/)
 ```
 
 Your `reduce` method should return the sum of `acc` and `el`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
index 420b532aa92..07858e7dec0 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
@@ -22,7 +22,7 @@ Set the initial value of the accumulator to `0`.
 Your `reduce` method should have `0` as the initial value.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
index d15924ec709..83b3eee67c2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
@@ -28,19 +28,19 @@ assert.notMatch(getMean.toString(), /mean\s*=/);
 You should not change the logic within the `reduce` method.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 You should divide the result of the `reduce` method by the length of the array.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)\s*\/\s*array\.length/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 You should use implicit return syntax to directly return the result of `reduce` divided by the array length.
 
 ```js
-assert.match(code, /const\s+getMean\s*=\s*\(?array\)?\s*=>\s*array\.reduce\(\(acc\s*,\s*el\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
+assert.match(code, /const\s+getMean\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
index b343b95d87f..d285852f92a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
@@ -18,13 +18,13 @@ To sort your numbers from smallest to largest, pass a callback function that tak
 Your `sort` method should have a callback function which takes an `a` and a `b` parameters.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)/)
 ```
 
 Your `sort` method should return the result of subtracting `b` from `a`.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
index 695579834a9..97bb9ef0e04 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
@@ -34,13 +34,13 @@ assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0
 If `array.length` is even, pass an array with the two middle numbers from the `sorted` array to the `getMean` function. The first item in the array argument should be the value at index `array.length / 2` from `sorted` and the second should use the value at the index `array.length / 2 - 1` from `sorted`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:/);
 ```
 
 If the `array.length` is odd, your `median` variable should assign the middle number to the `median` variable. The middle number is the value of `sorted` at `Math.floor(array.length / 2)`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:\s*sorted\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\)\];/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:\s*sorted\s*\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\s*\)\s*\]\s*;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
index 0f80bd629be..e38537ed779 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
@@ -22,13 +22,13 @@ assert.match(calculate.toString(), /median\s*=/);
 Your `median` variable should be assigned the value of `getMedian(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /median\s*=\s*getMedian\(numbers\)/);
+assert.match(calculate.toString(), /median\s*=\s*getMedian\(\s*numbers\s*\)/);
 ```
 
 Your `calculate` function should query the DOM for the `#median` element and set the `textContent` to `median`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#median\1\)\.textContent\s*=\s*median/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#median\1\s*\)\.textContent\s*=\s*median/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
index 17de177df31..cca770ac426 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
@@ -22,14 +22,13 @@ assert.match(getMode.toString(), /array\.forEach\(/);
 Your `.forEach()` method should have a callback function which takes an `el` parameter.
 
 ```js
-console.log(getMode.toString());
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)/);
 ```
 
 Your `.forEach()` method should increment the count for each number. Don't forget the fallback value.
 
 ```js
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)\s*\{?\s*(return)?\s*counts\[\s*el\s*\]\s*=\s*\(\s*counts\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)\s*\{?\s*(return)?\s*counts\s*\[\s*el\s*\]\s*=\s*\(\s*counts\s*\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
index cf3989dfb23..38eab8ab27a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
@@ -24,19 +24,19 @@ assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.so
 Your `getMode` function should pass a callback to the `sort` method with parameters `a` and `b`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)/)
 ```
 
 Your `getMode` function should use the `sort` method to sort the `Object.keys()` array and return the value of `counts[b]` minus the value of `counts[a]`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)/)
 ```
 
 Your `highest` variable should have the value of the first entry in the sorted `Object.keys(counts)` array.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)\[0\];/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)\s*\[\s*0\s*\]\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
index 985b3c31f5b..89f9c9c5683 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
@@ -20,13 +20,13 @@ assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filte
 Your `.filter()` method should take a callback function with a parameter `el`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)/);
 ```
 
 Your `.filter()` method should return whether the value of `counts[el]` is equal to `counts[highest]`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\[\s*el\s*\]\s*===\s*counts\[\s*highest\s*\];\s*\}/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\s*\[\s*el\s*\]\s*===\s*counts\s*\[\s*highest\s*\]\s*;\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
index 9ef808c7073..a4b0e3eee91 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /mode\s*=\s*getMode\(\s*numbers\s*\);/);
 Your `calculate` function should query the DOM for the `#mode` element and set the `textContent` to `mode`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#mode\1\)\.textContent\s*=\s*mode;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#mode\1\s*\)\.textContent\s*=\s*mode;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
index c88ce39ce83..e395102a36f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
@@ -12,7 +12,10 @@ Your next calculation is the <dfn>range</dfn>, which is the difference between t
 You previously learned about the global `Math` object. `Math` has a `.min()` method to get the smallest number from a series of numbers, and the `.max()` method to get the largest number. Here's an example that gets the smallest number from an array:
 
 ```js
-Math.min(1, 9, 11, -3, 0.5);
+const numbersArr = [2, 3, 1];
+
+console.log(Math.min(...numbersArr));
+// Expected output: 1
 ```
 
 Declare a `getRange` function that takes the same `array` parameter you have been using. Using `Math.min()`, `Math.max()`, and the spread operator, return the difference between the largest and smallest numbers in the list.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
index d562fff11bf..1bd4f6e9c83 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
@@ -14,13 +14,13 @@ Add the logic for calculating and displaying the range to your `calculate` funct
 Your `calculate` function should set a `range` variable to the result of `getRange(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /range\s*=\s*getRange\(numbers\);/);
+assert.match(calculate.toString(), /range\s*=\s*getRange\(\s*numbers\s*\);/);
 ```
 
 Your `calculate` function should set the `#range` element's `textContent` to the `range` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#range\1\)\.textContent\s*=\s*range;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#range\1\s*\)\.textContent\s*=\s*range;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
index 44250c299fc..9687bba9a9e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
@@ -26,13 +26,13 @@ assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(/);
 Your `differences` variable should use the `el` parameter in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Your `map` callback should return the value of `el` minus `mean`.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
index 129ec361cc7..fdc879e82b6 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
@@ -28,13 +28,13 @@ assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\
 Your `squaredDifferences` variable should use the `el` parameter in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Your `map` callback should return the value of `el` squared.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
 ```
 
 Your `map` callback should use the `**` operator.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
index a2b550ebf67..2d66881b2c4 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
@@ -28,14 +28,13 @@ assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDiffere
 Your `sumSquaredDifferences` variable should use the `acc` and `el` parameters in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Your `reduce` callback should return the sum of `acc` and `el`.
 
 ```js
-console.log(getVariance.toString());
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
index a9de0de327d..07069778076 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
@@ -46,19 +46,19 @@ assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(/);
 Your `variance` variable should use the `acc` and `el` parameters in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Your `reduce` callback should be an empty function.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}/);
 ```
 
 Your `reduce` callback should have an initial value of `0`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}\s*,\s*0\s*\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
index a144d66e015..f77567d2294 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
@@ -14,37 +14,37 @@ Within your empty `.reduce()` callback, declare a variable `difference` and set
 Your `reduce` callback should have a `difference` variable.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=/);
 ```
 
 Your `difference` variable should be set to the value of `el` minus `mean`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
 ```
 
 Your `reduce` callback should have a `squared` variable.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
 ```
 
 Your `squared` variable should be set to the value of `difference` to the power of 2.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
 ```
 
 Your `reduce` callback should return the value of `acc` plus `squared`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
 ```
 
 You should not remove the initial value of `0` from your `.reduce()` method.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
index 117861dc74e..9e366ddf03b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
@@ -16,7 +16,7 @@ Divide your `.reduce()` call by the length of the array (in your `variance` decl
 You should divide the result of the `.reduce()` call by the length of the array.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)\s*\/\s*array\.length;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)\s*\/\s*array\.length;/);
 ```
 
 You should return the value of `variance`.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
index 2d2caf9b81e..7a9b4437bd8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /variance\s*=\s*getVariance\(\s*numbers\s*\)/
 You should set the `textContent` of the `#variance` element to the value of the `variance` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#variance\1\)\.textContent\s*=\s*variance/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#variance\1\s*\)\.textContent\s*=\s*variance/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
index 015e50b74a6..fac72b8c424 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
@@ -14,13 +14,13 @@ Now update the `calculate` function to include the standard deviation logic, lik
 Your `calculate` function should have a `standardDeviation` variable set to the result of `getStandardDeviation(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(numbers\)/);
+assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(\s*numbers\s*\)/);
 ```
 
 You should update the `textContent` of the `#standardDeviation` element to be the `standardDeviation` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#standardDeviation\1\)\.textContent\s*=\s*standardDeviation/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#standardDeviation\1\s*\)\.textContent\s*=\s*standardDeviation/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
index 0b9aaa0646c..13bf8c7c185 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
@@ -16,19 +16,19 @@ To fix this, add an empty `.slice()` call before your `.sort()` method. The empt
 You should call `.slice()` on the `array` parameter.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)/);
 ```
 
 Your `.sort()` call should be chained to the `.slice()` call.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(/);
 ```
 
 You should not modify the `.sort()` method callback.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
index aab320a6e9c..804adb9ca94 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
@@ -24,7 +24,7 @@ Use the `async` keyword to create an asynchronous arrow function called `fetchDa
 You should use the `async` keyword to create an asynchronous arrow function called `fetchData`.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*[^}]*\s*}/);
 ```
 
 `fetchData` should be defined.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
index 601f5c355c5..3bfe111e0b1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
@@ -37,7 +37,7 @@ assert.match(code, /\s*const\s+res\s*=\s*await\s+fetch\(\s*(.*)\s*\)/);
 You should pass in the `forumLatest` constant to the `fetch` call.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
index d61d7834f22..e72ed356939 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+data/);
 You should assign `await res.json()` to the `data` variable.
 
 ```js
-assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\);?\s*/);
+assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
index c19a20337c3..f3faf5b539b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
@@ -28,7 +28,7 @@ assert.match(code, /\s*try\s*{[\s\S]*\s*console\.log\(\s*data\s*\)[\s\S]*}\s*cat
 You should call the `fetchData()` function, after the `fetchData()` function is defined.
 
 ```js
-assert.match(code, /};?\s*fetchData\(\)/);
+assert.match(code, /};?\s*fetchData\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
index 3a1dabef58c..fe71e106cb1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
@@ -22,7 +22,7 @@ assert.match(code, /\s*showLatestPosts\(.*\);??\s*/);
 You should pass `data` as the argument to `showLatestsPosts()`.
 
 ```js
-assert.match(code, /\s*showLatestPosts\(data\);?\s*/);
+assert.match(code, /\s*showLatestPosts\(\s*data\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
index 6dc66d2835f..c5189318b65 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
@@ -20,7 +20,7 @@ assert.match(code, /\s*const\s+thousands\s*=/);
 Your should assign `Math.floor(views / 1000)` to your `thousands` variable.
 
 ```js
-assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(views\s*\/\s*1000\)\s*/);
+assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(\s*views\s*\/\s*1000\s*\)\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
index 5ed5c50c483..89cfebbc774 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
@@ -14,7 +14,7 @@ Inside the `if` statement, destructure `className` and `category` from the `allC
 You should destructure `className` and `category` from the `allCategories[id]` object. The properties can be in any order.
 
 ```js
-assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\[id\]\s*/g));
+assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\s*\[\s*id\s*\]\s*/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
index 4db11cecaf8..adda237d1bc 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
@@ -27,19 +27,19 @@ Inside your `fetchData` function, add a `try...catch` statement. The `catch` blo
 You should have a `try` block inside your `fetchData` function.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
 ```
 
 You should have a `catch` block after your `try` block.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
 ```
 
 Your `catch` block should have an `err` parameter.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
 ```
 
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
index 6fbf74ffb06..2b6e53508b4 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+postsContainer\s*=/);
 You should use `document.getElementById()` to get the `#posts-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)posts-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/);
 ```
 
 You should assign the `#posts-container` element to your `postsContainer` variable.
 
 ```js
-assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(('|"|`)posts-container\1\)/g));
+assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
index 696a11ddbf4..e5af69a01c3 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
@@ -14,7 +14,7 @@ You will be using this as an event listener for the `sortButton`. Because button
 Your `sortInputArray` function should call `event.preventDefault()`.
 
 ```js
-assert.match(sortInputArray.toString(), /event\.preventDefault\(\)/);
+assert.match(sortInputArray.toString(), /event\.preventDefault\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
index b9fac73101c..5c338d2a3e3 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*
 You should assign `temp` the value of `array[j]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?/);
 ```
 
 You should assign `array[j]` the value of `array[j + 1]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?/);
 ```
 
 You should assign `array[j + 1]` the value of `temp`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
index f61a8dd398a..d835b251448 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished executing, return the sorted array.
 You should `return` the `array` variable.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
index 5a18aca4c28..526d3370634 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
@@ -17,7 +17,7 @@ You should remove your `console.log()` call.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(bubbleSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(bubbleSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
index 37c1aece78e..12da830a4eb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{
 You should assign `array[i]` to `temp`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]/)
 ```
 
 You should assign `array[minIndex]` to `array[i]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]/)
 ```
 
 You should assign `temp` to `array[minIndex]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
index 7eff42c8e27..d559af9f277 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished, you need to return the array. Once
 You should `return` the `array` after your outer loop completes.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
index d85d389480f..38f4534fa7f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
@@ -15,7 +15,7 @@ You should remove the `console.log()` statement from `selectionSort()`.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(selectionSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(selectionSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
index e97522ef715..e1ffd2e7fae 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
@@ -16,7 +16,7 @@ Do so by assigning the value at the `j` index to the next index.
 Before decrementing `j`, assign the value at `j` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
index 8d8c9dd9b9a..d7f96ea0f19 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
@@ -16,7 +16,7 @@ Use the assignment operator to insert your current value into the correct index.
 You should assign `currValue` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
+assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
index 32af423fc5b..7acde926bcf 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
@@ -14,7 +14,7 @@ After your `for` loop has finished, you need to return the array. You should the
 You should `return` the `array`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
index 453471bd825..18b70db2d7a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
@@ -11,7 +11,7 @@ One of the most powerful tools is your developer console. Depending on your brow
 
 The developer console will include errors that are produced by your code, but you can also use it to see values of variables in your code, which is helpful for debugging.
 
-Add a `console.log("Hello World");` line between your `script` tags. Then click the "Console" button to open the console. You should see the text `Hello World`.
+Add a `console.log("Hello World");` line between your `script` tags. Then click the "Console" button to open the console. You should see the text `"Hello World"`.
 
 Note how the line ends with a semi-colon. It is common practice in JavaScript to end your code lines with semi-colons.
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
index 8dc3c28825e..4d809bc2069 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
@@ -10,10 +10,10 @@ dashedName: step-7
 Variables can be <dfn>assigned</dfn> a value. When you do this while you declare it, this is called <dfn>initialization</dfn>. For example:
 
 ```js
-let camperbot = "Bot";
+let age = 32;
 ```
 
-This would initialize the `camperbot` variable with a value of `Bot`, a string.
+This would initialize the `age` variable with a value of `32`, a number.
 
 Initialize your `xp` variable to have a value of `0`, a number.
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
index 636c47fc157..3543b21abbe 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
@@ -15,7 +15,7 @@ let order = ["first", "second", "third"];
 
 This is an array which holds three values. Notice how the values are separated by commas.
 
-Change your `inventory` variable to be an array with the strings `stick`, `dagger`, and `sword`.
+Change your `inventory` variable to be an array with the strings `"stick"`, `"dagger"`, and `"sword"`.
 
 # --hints--
 
@@ -31,19 +31,19 @@ Your `inventory` variable should have three values.
 assert.lengthOf(inventory, 3);
 ```
 
-Your `inventory` variable should include the string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
 ```
 
-Your `inventory` variable should include the string `dagger`.
+Your `inventory` variable should include the string `"dagger"`.
 
 ```js
 assert.include(inventory, "dagger");
 ```
 
-Your `inventory` variable should include the string `sword`.
+Your `inventory` variable should include the string `"sword"`.
 
 ```js
 assert.include(inventory, "sword");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
index a04ab731e25..45259c40839 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-For now, you want the player to start with just the `stick`. Change the `inventory` array to have `stick` as its only value.
+For now, you want the player to start with just the `"stick"`. Change the `inventory` array to have `"stick"` as its only value.
 
 # --hints--
 
@@ -23,7 +23,7 @@ Your `inventory` variable should only have one value.
 assert.lengthOf(inventory, 1);
 ```
 
-Your `inventory` variable should include the string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
index d7c711adac8..9c368184a1a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
@@ -33,10 +33,10 @@ You should use `document.querySelector()`.
 assert.match(code, /document\.querySelector/);
 ```
 
-You should use the `#button1` selector.
+You should use the `"#button1"` selector.
 
 ```js
-assert.match(code, /querySelector\(('|")#button1\1\)/);
+assert.match(code, /querySelector\(\s*('|")#button1\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
index a00a34f16e9..db89259da1d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
@@ -9,12 +9,14 @@ dashedName: step-40
 
 `button1` represents your first `button` element. These elements have a special property called `onclick`, which you can use to determine what happens when someone clicks that button.
 
-You can access properties in JavaScript a couple of different ways. The first is with <dfn>dot notation</dfn>. Accessing the `onclick` property of a button would look like:
+You can access properties in JavaScript a couple of different ways. The first is with <dfn>dot notation</dfn>. Here is an example of using dot notation to set the `onclick` property of a button to a function reference.
 
 ```js
-button.onclick
+button.onclick = myFunction;
 ```
 
+In this example, `button` is the button element, and `myFunction` is a reference to a function. When the button is clicked, `myFunction` will be called.
+
 Use dot notation to set the `onclick` property of your `button1` to the function reference of `goStore`. Note that `button1` is already declared, so you don't need to use `let` or `const`.
 
 # --hints--
@@ -31,10 +33,10 @@ You should not use `let` or `const`.
 assert.notMatch(code, /(let|const)\s+button1\.onclick/);
 ```
 
-You should assign the `goStore` function reference to `button1.onclick`.
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button1\.onclick\s*=\s*goStore/);
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
index 3fab18f1700..e68059f8b0a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
@@ -13,6 +13,12 @@ Once you have done that, open your console and try clicking the buttons on your
 
 # --hints--
 
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
+
+```js
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
+```
+
 You should use dot notation to access the `onclick` property of `button2`.
 
 ```js
@@ -25,10 +31,10 @@ You should not use `let` or `const` to assign `button2.onclick`.
 assert.notMatch(code, /(let|const)\s+button2\.onclick/);
 ```
 
-You should set the `onclick` property of `button2` to the variable `goCave`.
+You should assign the `goCave` function reference to `button2.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button2\.onclick\s*=\s*goCave/);
+assert.match(code, /button2\.onclick\s*=\s*goCave\s*;?\s*$/m);
 ```
 
 You should use dot notation to access the `onclick` property of `button3`.
@@ -43,10 +49,10 @@ You should not use `let` or `const` to assign `button3.onclick`.
 assert.notMatch(code, /(let|const)\s+button3\.onclick/);
 ```
 
-You should set the `onclick` property of `button3` to the variable `fightDragon`.
+You should assign the `fightDragon` function reference to `button3.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button3\.onclick\s*=\s*fightDragon/);
+assert.match(code, /button3\.onclick\s*=\s*fightDragon\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
index 13c49730424..a477fb58cb2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-For now, make your `goStore` function output the message `Going to store.` to the console. For example, here is a function that outputs the message `Hello World`.
+For now, make your `goStore` function output the message `"Going to store."` to the console. For example, here is a function that outputs the message `"Hello World"`.
 
 ```js
 function functionName() {
@@ -20,13 +20,13 @@ function functionName() {
 You should have a `console.log("Going to store.");` line in your code. Don't forget the semi-colon.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to store\.\1\);/);
+assert.match(code, /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 Your `console.log("Going to store.");` line should be in your `goStore` function.
 
 ```js
-assert.match(goStore.toString(), /console\.log\(('|")Going to store\.\1\);/);
+assert.match(goStore.toString(), /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
index c7a2fe48eab..9998d642977 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
@@ -7,7 +7,7 @@ dashedName: step-37
 
 # --description--
 
-Now create a `goCave` function that prints `Going to cave.` to the console.
+Now create a `goCave` function that prints `"Going to cave."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(goCave);
 You should have a `console.log("Going to cave.");` line in your code.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 Your `console.log("Going to cave.");` line should be inside your `goCave` function.
 
 ```js
-assert.match(goCave.toString(), /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(goCave.toString(), /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
index 4dd7e1726b8..57f7abed576 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
@@ -7,7 +7,7 @@ dashedName: step-38
 
 # --description--
 
-Now create a `fightDragon` function that prints `Fighting dragon.` to the console.
+Now create a `fightDragon` function that prints `"Fighting dragon."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(fightDragon);
 You should have a `console.log("Fighting dragon.");` line in your code.
 
 ```js
-assert.match(code, /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 Your `console.log("Fighting dragon.");` line should be inside your `fightDragon` function.
 
 ```js
-assert.match(fightDragon.toString(), /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(fightDragon.toString(), /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
index e8837ca0da4..48ceceef1e7 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
@@ -9,21 +9,25 @@ dashedName: step-42
 
 The `innerText` property controls the text that appears in an HTML element. For example:
 
-```js
-const info = document.querySelector("#info");
-info.innerText = "Hello World";
+```html
+<p id="info">Demo content</p> 
 ```
 
-This code would change the element assigned to the `info` variable to have the text `Hello World`.
+```js
+const info = document.querySelector("#info"); 
+info.innerText = "Hello World"; 
+```
 
-When a player clicks your `Go to store` button, you want to change the buttons and text. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `Buy 10 health (10 gold)`.
+The following example would change the text of the `p` element from `Demo content` to `Hello World`.
+
+When a player clicks your `Go to store` button, you want to change the buttons and text. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `"Buy 10 health (10 gold)"`.
 
 # --hints--
 
 You should not have a `console.log("Going to store.");` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(('|")Going to store\.\1\)/);
+assert.notMatch(code, /console\.log\(\s*('|")Going to store\.\1\s*\)/);
 ```
 
 You should use dot notation to access the `innerText` property of `button1`.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
index 559432d0177..08af96c3858 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, add a line that updates the text of `button2` to say `Buy weapon (30 gold)` and update the text of `button3` to say `Go to town square`.
+Now, add a line that updates the text of `button2` to say `"Buy weapon (30 gold)"` and update the text of `button3` to say `"Go to town square"`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button2\.innerText/);
 ```
 
-You should update the `innerText` property of `button2` to be `Buy weapon (30 gold)`.
+You should update the `innerText` property of `button2` to be `"Buy weapon (30 gold)"`.
 
 ```js
 assert.match(code, /button2\.innerText\s*=\s*('|")Buy weapon \(30 gold\)\1/);
@@ -47,7 +47,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button3\.innerText/);
 ```
 
-You should update the `innerText` property of `button3` to be `Go to town square`.
+You should update the `innerText` property of `button3` to be `"Go to town square"`.
 
 ```js
 assert.match(code, /button3\.innerText\s*=\s*('|")Go to town square\1/);
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
index 2975759fbf0..854ec298a0e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Now you need to modify your display text. Change the `innerText` property of the `text` to be `You enter the store.`.
+Now you need to modify your display text. Change the `innerText` property of the `text` to be `"You enter the store."`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `text`
 assert.notMatch(code, /(let|const)\s+text\.innerText/);
 ```
 
-You should update the `innerText` property of `text` to be `You enter the store.`.
+You should update the `innerText` property of `text` to be `"You enter the store."`.
 
 ```js
 assert.match(code, /text\.innerText\s*=\s*('|")You enter the store.\1/);
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
index 460640e6169..211dc95d848 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
@@ -7,25 +7,25 @@ dashedName: step-48
 
 # --description--
 
-In your `goTown` function, change your `button` elements' `innerText` properties to be `Go to store`, `Go to cave`, and `Fight dragon`. Update your `onclick` properties to be `goStore`, `goCave`, and `fightDragon`, respectively.
+In your `goTown` function, change your `button` elements' `innerText` properties to be `"Go to store"`, `"Go to cave"`, and `"Fight dragon"`. Update your `onclick` properties to be `goStore`, `goCave`, and `fightDragon`, respectively.
 
-Finally, update `innerText` property of your `text` to be `You are in the town square. You see a sign that says Store.`.
+Finally, update `innerText` property of your `text` to be `"You are in the town square. You see a sign that says Store."`.
 
 # --hints--
 
-You should set the `button1.innerText` property to be `Go to store` in your `goTown` function.
+You should set the `button1.innerText` property to be `"Go to store"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-You should set the `button2.innerText` property to be `Go to cave` in your `goTown` function.
+You should set the `button2.innerText` property to be `"Go to cave"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-You should set the `button3.innerText` property to be `Fight dragon` in your `goTown` function.
+You should set the `button3.innerText` property to be `"Fight dragon"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -49,7 +49,7 @@ You should set the `button3.onclick` property to be `fightDragon` in your `goTow
 assert.match(goTown.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-You should set the `text.innerText` property to be `You are in the town square. You see a sign that says Store.` in your `goTown` function.
+You should set the `text.innerText` property to be `"You are in the town square. You see a sign that says Store."` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /text\.innerText\s*=\s*('|")You are in the town square. You see a sign that says Store\.\1/);
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
index f4de5d7ea31..d4badf22a8c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
@@ -28,7 +28,7 @@ assert.match(code, /function\s+update/);
 Your `update` function should take a parameter called `location`.
 
 ```js
-assert.match(update.toString(), /update\(location\)/);
+assert.match(update.toString(), /update\(\s*location\s*\)/);
 ```
 
 Your `update` function should be empty.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
index 1bdff309802..637830bb00f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. For example, here is an object with a key of `name` set to `Quincy Larson`.
+Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. For example, here is an object with a key of `name` set to `"Quincy Larson"`.
 
 ```js
 {
@@ -15,7 +15,7 @@ Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is t
 }
 ```
 
-Add a `name` property to your empty object and give it a value of `town square`.
+Add a `name` property to your empty object and give it a value of `"town square"`.
 
 # --hints--
 
@@ -31,7 +31,7 @@ Your first value of `locations` should have a `name` property.
 assert.isDefined(locations[0].name);
 ```
 
-Your first value of `locations` should have a `name` property with a value of `town square`.
+Your first value of `locations` should have a `name` property with a value of `"town square"`.
 
 ```js
 assert.equal(locations[0].name, "town square");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
index d04d9656fc0..d9377336c54 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
@@ -25,19 +25,19 @@ assert.isString(locations[0]["button text"][1]);
 assert.isString(locations[0]["button text"][2]);
 ```
 
-The first value in the `button text` array should be "Go to store".
+The first value in the `button text` array should be `"Go to store"`.
 
 ```js
 assert.equal(locations[0]["button text"][0], "Go to store");
 ```
 
-The second value in the `button text` array should be "Go to cave".
+The second value in the `button text` array should be `"Go to cave"`.
 
 ```js
 assert.equal(locations[0]["button text"][1], "Go to cave");
 ```
 
-The third value in the `button text` array should be "Fight dragon".
+The third value in the `button text` array should be `"Fight dragon"`.
 
 ```js
 assert.equal(locations[0]["button text"][2], "Fight dragon");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
index 0c9d4b91c4c..60eb603a60b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
@@ -23,7 +23,7 @@ Your `text` property should be a string.
 assert.isString(locations[0]["text"]);
 ```
 
-Your `text` property should have the value `You are in the town square. You see a sign that says \"Store\".`
+Your `text` property should have the value `"You are in the town square. You see a sign that says \"Store\"."`
 
 ```js
 assert.equal(locations[0]["text"], "You are in the town square. You see a sign that says \"Store\".");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
index 66fc8a22b47..93d18fc103a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
@@ -37,7 +37,7 @@ Your second `locations` object should have a `button text` property which is an
 assert.isArray(locations[1]["button text"]);
 ```
 
-Your `button text` property should have the string values `Buy 10 health (10 gold)`, `Buy weapon (30 gold)`, and `Go to town square`.
+Your `button text` property should have the string values `"Buy 10 health (10 gold)"`, `"Buy weapon (30 gold)"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[1]["button text"][0], "Buy 10 health (10 gold)");
@@ -65,7 +65,7 @@ Your second `locations` object should have a `text` property which is a string.
 assert.isString(locations[1].text);
 ```
 
-Your second `locations` object should have a `text` property with the value of `You enter the store.`.
+Your second `locations` object should have a `text` property with the value of `"You enter the store."`.
 
 ```js
 assert.equal(locations[1].text, "You enter the store.");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
index 67c3145f0a8..d5ce25ee64b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
@@ -11,19 +11,19 @@ Now you can consolidate some of your code. Start by copying the code from inside
 
 # --hints--
 
-Your `update` function should set `button1.innerText` to `Go to store`.
+Your `update` function should set `button1.innerText` to `"Go to store"`.
 
 ```js
 assert.match(update.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-Your `update` function should set `button2.innerText` to `Go to cave`.
+Your `update` function should set `button2.innerText` to `"Go to cave"`.
 
 ```js
 assert.match(update.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-Your `update` function should set `button3.innerText` to `Fight dragon`.
+Your `update` function should set `button3.innerText` to `"Fight dragon"`.
 
 ```js
 assert.match(update.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -47,7 +47,7 @@ Your `update` function should set `button3.onclick` to `fightDragon`.
 assert.match(update.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-Your `update` function should set `text.innerText` to `You are in the town square. You see a sign that says \"Store\".`.
+Your `update` function should set `text.innerText` to `"You are in the town square. You see a sign that says \"Store\"."`.
 
 ```js
 assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town square. You see a sign that says \\"Store\\"\."/);
@@ -56,13 +56,13 @@ assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town squa
 Your `goTown` function should be empty.
 
 ```js
-assert.match(goTown.toString(), /function goTown\(\) \{\}/);
+assert.match(goTown.toString(), /function goTown\(\s*\) \{\}/);
 ```
 
 Your `goStore` function should be empty.
 
 ```js
-assert.match(goStore.toString(), /function goStore\(\) \{\}/);
+assert.match(goStore.toString(), /function goStore\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
index 73d26a9edcf..8ed32a92744 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
@@ -20,13 +20,13 @@ myFunction();
 You should call the `update` function in the `goTown` function.
 
 ```js
-assert.match(goTown.toString(), /update\(\)/);
+assert.match(goTown.toString(), /update\(\s*\)/);
 ```
 
 Don't forget your ending semi-colon.
 
 ```js
-assert.match(goTown.toString(), /update\(\);/);
+assert.match(goTown.toString(), /update\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
index 95e2eefe1dd..6f7a3e7ce7c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
@@ -20,7 +20,7 @@ Pass your `locations` array into the `update` call.
 You should pass the `locations` array into the `update` call.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
index c436520891c..56ef4de36db 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
@@ -7,7 +7,7 @@ dashedName: step-62
 
 # --description--
 
-The `locations` array contains two locations: the `town square` and the `store`. Currently you are passing that entire array into the `update` function.
+The `locations` array contains two locations: the `"town square"` and the `"store"`. Currently you are passing that entire array into the `update` function.
 
 Pass in only the first element of the `locations` array by adding `[0]` at the end of the variable. For example: `myFunction(arg[0]);`.
 
@@ -18,25 +18,25 @@ This is called <dfn>bracket notation</dfn>. Values in an array are accessed by i
 You should use bracket notation with `locations`.
 
 ```js
-assert.match(code, /locations\[/);
+assert.match(code, /locations\s*\[/);
 ```
 
 You should access the first object in the `locations` array. Remember that arrays are zero-based.
 
 ```js
-assert.match(code, /locations\[0\]/);
+assert.match(code, /locations\s*\[\s*0\s*\]/);
 ```
 
 You should pass the first object in the `locations` array into the `update` function.
 
 ```js
-assert.match(code, /update\(locations\[0\]\);/);
+assert.match(code, /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 This call should still be in your `goTown()` function.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\[0\]\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
index 627c1c5a788..667ee7893c6 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
@@ -9,20 +9,20 @@ dashedName: step-63
 
 Now your `update` function needs to use the argument you pass into it.
 
-Inside the `update` function, change the value of the `button1.innerText` assignment to be `location["button text"]`. That way, you use bracket notation to get the `button text` property of the `location` object passed into the function.
+Inside the `update` function, change the value of the `button1.innerText` assignment to be `location["button text"]`. That way, you use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 # --hints--
 
-Your `update` function should use bracket notation to get the `button text` property of the `location` object passed into the function.
+Your `update` function should use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 ```js
 assert.match(update.toString(), /location[('|")button text\1]/);
 ```
 
-You should assign the value of the `button text` property of the `location` object to the `innerText` property of `button1`.
+You should assign the value of the `"button text"` property of the `location` object to the `innerText` property of `button1`.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
index e6c4ee6f75f..a7fd2708cf6 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
@@ -7,20 +7,20 @@ dashedName: step-64
 
 # --description--
 
-`location["button text"]` is an array with three elements. Change the `button1.innerText` assignment to be the first element of that array instead.
+`location["button text"]` is an array with three elements. Change the `button1.innerText` assignment to be `location["button text"][0]` which represents the first element of the array.
 
 # --hints--
 
-You should access the first element of the `button text` property of the `location` parameter.
+You should access the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.innerText` property to be the first element of the `button text` property of the `location` parameter.
+You should set the `button1.innerText` property to be the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
index 76c372ce3b6..27b2928be2f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
@@ -7,32 +7,32 @@ dashedName: step-65
 
 # --description--
 
-Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `button text` array, respectively.
+Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `"button text"` array, respectively.
 
 # --hints--
 
-You should access the second element of the `button text` property of the `location` parameter.
+You should access the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.innerText` property to be the second element of the `button text` property of the `location` parameter.
+You should set the `button2.innerText` property to be the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.innerText\s*=\s*location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /button2\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button text` property of the `location` parameter.
+You should access the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.innerText` property to be the third element of the `button text` property of the `location` parameter.
+You should set the `button3.innerText` property to be the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.innerText\s*=\s*location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /button3\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
index 0b57f0b74b3..f60631bbd6b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
@@ -7,44 +7,44 @@ dashedName: step-66
 
 # --description--
 
-Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `button functions` array.
+Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `"button functions"` array.
 
 # --hints--
 
-You should access the first element of the `button functions` property of the `location` parameter.
+You should access the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.onclick` property to be the first element of the `button functions` property of the `location` parameter.
+You should set the `button1.onclick` property to be the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.onclick\s*=\s*location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /button1\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should access the second element of the `button functions` property of the `location` parameter.
+You should access the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.onclick` property to be the second element of the `button functions` property of the `location` parameter.
+You should set the `button2.onclick` property to be the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.onclick\s*=\s*location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /button2\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button functions` property of the `location` parameter.
+You should access the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.onclick` property to be the third element of the `button functions` property of the `location` parameter.
+You should set the `button3.onclick` property to be the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.onclick\s*=\s*location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /button3\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
index 6817b00fbb1..5d4848bd16c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
@@ -22,7 +22,7 @@ assert.match(goStore.toString(), /update\(/);
 Your `goStore` function should pass the second element of the `locations` array as your argument to `update()`.
 
 ```js
-assert.match(goStore.toString(), /update\(locations\[1\]\)/);
+assert.match(goStore.toString(), /update\(\s*locations\s*\[\s*1\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
index dd740f8c0c1..a45ddd1878f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
@@ -26,13 +26,13 @@ assert.isFunction(fightBeast);
 `fightSlime` should be empty.
 
 ```js
-assert.match(fightSlime.toString(), /function fightSlime\(\) \{\}/);
+assert.match(fightSlime.toString(), /function fightSlime\(\s*\) \{\}/);
 ```
 
 `fightBeast` should be empty.
 
 ```js
-assert.match(fightBeast.toString(), /function fightBeast\(\) \{\}/);
+assert.match(fightBeast.toString(), /function fightBeast\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
index 62851448e89..4b15af5b25d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
@@ -9,14 +9,13 @@ dashedName: step-70
 
 Add a third object to the `locations` array. Give it the same properties as the other two objects.
 
-Set `name` to `cave`. Set `button text` to an array with the strings `Fight slime`, `Fight fanged beast`, and `Go to town square`. Set the `button functions` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `You enter the cave. You see some monsters.`.
+Set `name` to `cave`. Set `button text` to an array with the strings `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`. Set the `"button functions"` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `"You enter the cave. You see some monsters."`.
 
 # --hints--
 
 You should have three values in your `locations` array.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 3);
 ```
 
@@ -26,19 +25,19 @@ Your third `locations` value should be an object.
 assert.isObject(locations[2]);
 ```
 
-Your third `locations` object should have a `name` property with the value of `cave`.
+Your third `locations` object should have a `name` property with the value of `"cave"`.
 
 ```js
 assert.equal(locations[2].name, "cave");
 ```
 
-Your third `locations` object should have a `button text` property which is an array.
+Your third `locations` object should have a `"button text"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button text"]);
 ```
 
-Your `button text` property should have the string values `Fight slime`, `Fight fanged beast`, and `Go to town square`.
+Your `"button text"` property should have the string values `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[2]["button text"][0], "Fight slime");
@@ -46,13 +45,13 @@ assert.equal(locations[2]["button text"][1], "Fight fanged beast");
 assert.equal(locations[2]["button text"][2], "Go to town square");
 ```
 
-Your third `locations` object should have a `button functions` property which is an array.
+Your third `locations` object should have a `"button functions"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button functions"]);
 ```
 
-Your `button functions` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
+Your `"button functions"` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
 
 ```js
 assert.equal(locations[2]["button functions"][0], fightSlime);
@@ -66,7 +65,7 @@ Your third `locations` object should have a `text` property which is a string.
 assert.isString(locations[2].text);
 ```
 
-Your third `locations` object should have a `text` property with the value of `You enter the cave. You see some monsters.`.
+Your third `locations` object should have a `text` property with the value of `"You enter the cave. You see some monsters."`.
 
 ```js
 assert.equal(locations[2].text, "You enter the cave. You see some monsters.");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
index e2940ffe089..b0167cd055b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
@@ -7,7 +7,7 @@ dashedName: step-71
 
 # --description--
 
-Now that you have a `cave` location object, update your `goCave` function to call `update` and pass that new `cave` location. Remember that this is the third element in your `locations` array.
+Now that you have a `"cave"` location object, update your `goCave` function to call `update` and pass that new `"cave"` location. Remember that this is the third element in your `locations` array.
 
 Don't forget to remove your `console.log` call!
 
@@ -16,19 +16,19 @@ Don't forget to remove your `console.log` call!
 You should use bracket notation to access the third element in your `locations` array.
 
 ```js
-assert.match(code, /locations\[2\]/);
+assert.match(code, /locations\s*\[\s*2\s*\]/);
 ```
 
 You should pass the third element in your `locations` array to `update`.
 
 ```js
-assert.match(code, /update\(locations\[2\]\)/);
+assert.match(code, /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 You should call `update` with the third element in your `locations` array in your `goCave` function.
 
 ```js
-assert.match(goCave.toString(), /update\(locations\[2\]\)/);
+assert.match(goCave.toString(), /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 You should not have the `console.log` statement in your `goCave` function.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
index 6d9ec105942..a4107c9ad96 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
@@ -7,7 +7,7 @@ dashedName: step-72
 
 # --description--
 
-Now that your `store` and `cave` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
+Now that your `"store"` and `"cave"` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
 
 For example, here is how you would set `num` equal to `5` less than `num`: `num = num - 5;`.
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
index a83d06ee55e..d7c09f74170 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
@@ -19,7 +19,7 @@ const total = document.querySelector('#total');
 total.innerText = value;
 ```
 
-You can test this by clicking your "Go to store" button, followed by your "Buy Health" button.
+You can test this by clicking your `"Go to store"` button, followed by your `"Buy Health"` button.
 
 **Note:** Your answer should only be two lines of code.
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
index c4beb722227..cd5877bdf64 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
@@ -7,17 +7,20 @@ dashedName: step-76
 
 # --description--
 
-What if the player doesn't have enough gold to buy health? When you want to run code conditionally, you can use the `if` statement. Put all of the code in your `buyHealth` function inside an `if` statement. For example:
+What if the player doesn't have enough gold to buy health? When you want to run code conditionally, you can use the <dfn>if</dfn> statement.
+
+An `if` statement is used to make decisions in code. The keyword `if` is followed by a condition in parentheses. If the condition is true, the code inside the curly braces `{}` is executed. If the condition is false, the code inside the curly braces is skipped.
+
+Here is an example of an `if` statement:
 
 ```js
-function myFunction() {
-  if ("condition") {
-    console.log("Hello World!");
-  }
+const num = 5;
+if (num >= 3) {
+  console.log("This code will run because num is greater than or equal to 3.");
 }
 ```
 
-For now, the `if` statement condition should be set to the string `condition` as a placeholder.
+Start by placing all of the code in your `buyHealth` function inside an `if` statement. For the `if` statement condition, check if `gold` is greater than or equal to `10`.
 
 # --hints--
 
@@ -27,16 +30,16 @@ Your `buyHealth` function should have an `if` statement.
 assert.match(buyHealth.toString(), /if/);
 ```
 
-Your `if` statement should have the string `condition` for the condition.
+Your `if` statement should check if `gold` is greater than or equal to `10`.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)/);
 ```
 
 All of your `buyHealth` code should be inside the `if` statement.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)\s*\{[\s\S]*\}/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)\s*{\s*gold\s*-=\s*10;\s*health\s*\+=\s*10;\s*goldText\.innerText\s*=\s*gold;\s*healthText\.innerText\s*=\s*health;\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
index 3752f881b10..051ddd2f2d7 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c5db7888af27af23f0dd
-title: ステップ 78
+title: Step 77
 challengeType: 0
-dashedName: step-78
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
index 857812e10fd..1498e6c09c4 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8c65b75664c28a8e59c16
-title: ステップ 79
+title: Step 78
 challengeType: 0
-dashedName: step-79
+dashedName: step-78
 ---
 
 # --description--
 
-Inside the `else` statement, set `text.innerText` to equal `You do not have enough gold to buy health.`.
+Inside the `else` statement, set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 # --hints--
 
-Your `buyHealth` function should set `text.innerText` to equal `You do not have enough gold to buy health.`.
+Your `buyHealth` function should set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 ```js
 assert.match(buyHealth.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy health\.\1/);
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
index 4c9a143a278..f38b4906897 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c6815f5f1a29735efe1b
-title: ステップ 80
+title: Step 79
 challengeType: 0
-dashedName: step-80
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
index a32608fa854..b2dc007106e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c7322e42962ad53ad204
-title: ステップ 81
+title: Step 80
 challengeType: 0
-dashedName: step-81
+dashedName: step-80
 ---
 
 # --description--
 
-Just like your `locations` array, your `weapons` array will hold objects. Add four objects to the `weapons` array, each with two properties: `name` and `power`. The first should have the `name` set to `stick` and the `power` set to `5`. The second should be `dagger` and `30`. The third, `claw hammer` and `50`. The fourth, `sword` and `100`.
+Just like your `locations` array, your `weapons` array will hold objects. Add four objects to the `weapons` array, each with two properties: `name` and `power`. The first should have the `name` set to `"stick"` and the `power` set to `5`. The second should be `"dagger"` and `30`. The third, `"claw hammer"` and `50`. The fourth, `"sword"` and `100`.
 
 # --hints--
 
@@ -26,28 +26,28 @@ assert.isObject(weapons[2]);
 assert.isObject(weapons[3]);
 ```
 
-Your first `weapons` object should have the `name` set to `stick` and the `power` set to `5`.
+Your first `weapons` object should have the `name` set to `"stick"` and the `power` set to `5`.
 
 ```js
 assert.equal(weapons[0].name, 'stick');
 assert.equal(weapons[0].power, 5);
 ```
 
-Your second `weapons` object should have the `name` set to `dagger` and the `power` set to `30`.
+Your second `weapons` object should have the `name` set to `"dagger"` and the `power` set to `30`.
 
 ```js
 assert.equal(weapons[1].name, 'dagger');
 assert.equal(weapons[1].power, 30);
 ```
 
-Your third `weapons` object should have the `name` set to `claw hammer` and the `power` set to `50`.
+Your third `weapons` object should have the `name` set to `"claw hammer"` and the `power` set to `50`.
 
 ```js
 assert.equal(weapons[2].name, 'claw hammer');
 assert.equal(weapons[2].power, 50);
 ```
 
-Your fourth `weapons` object should have the `name` set to `sword` and the `power` set to `100`.
+Your fourth `weapons` object should have the `name` set to `"sword"` and the `power` set to `100`.
 
 ```js
 assert.equal(weapons[3].name, 'sword');
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
index b6a809df57f..dd8e2a5d9ec 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c7a59e72c02bb1c717d2
-title: ステップ 82
+title: Step 81
 challengeType: 0
-dashedName: step-82
+dashedName: step-81
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.include(buyWeapon.toString(), 'if');
 Your `if` statement should check if `gold` is greater than or equal to `30`.
 
 ```js
-assert.match(buyWeapon.toString(), /if\s*\(gold\s*>=\s*30\)/);
+assert.match(buyWeapon.toString(), /if\s*\(\s*gold\s*>=\s*30\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
index 4de0856625b..570844fee8c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c89e4272512d44fc1c66
-title: ステップ 83
+title: Step 82
 challengeType: 0
-dashedName: step-83
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
index 1fed9640ced..f7e010232a8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c8cee8e5cf2e001789b4
-title: ステップ 84
+title: Step 83
 challengeType: 0
-dashedName: step-84
+dashedName: step-83
 ---
 
 # --description--
 
-The value of the `currentWeapon` variable corresponds to an index in the `weapons` array. The player starts with a `stick`, since `currentWeapon` starts at `0` and `weapons[0]` is the `stick` weapon.
+The value of the `currentWeapon` variable corresponds to an index in the `weapons` array. The player starts with a `"stick"`, since `currentWeapon` starts at `0` and `weapons[0]` is the `"stick"` weapon.
 
 In the `buyWeapon` function, use compound assignment to add `1` to `currentWeapon` - the user is buying the next weapon in the `weapons` array.
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
index 02c941be10e..c2b63fbfcee 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ca22d29fe62f3952bdf5
-title: ステップ 85
+title: Step 84
 challengeType: 0
-dashedName: step-85
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
index 0ac763ad697..8ebcf334d01 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8cb19bd7f8a304e5427a1
-title: ステップ 86
+title: Step 85
 challengeType: 0
-dashedName: step-86
+dashedName: step-85
 ---
 
 # --description--
 
-Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `You now have a new weapon.`.
+Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `"You now have a new weapon."`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should update the `innerText` property of the `goldText` element to be `gold
 assert.match(buyWeapon.toString(), /goldText\.innerText\s*=\s*gold/);
 ```
 
-You should update the `innerText` property of the `text` element to be `You now have a new weapon.`.
+You should update the `innerText` property of the `text` element to be `"You now have a new weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a new weapon\.\1/);
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
index 2dc107ef96b..81ebba26eab 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cbd1e3595431d5a2b3f1
-title: ステップ 87
+title: Step 86
 challengeType: 0
-dashedName: step-87
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
index 1f82e0beafd..a55298fd7e8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cce1b0c32c33017cf2e9
-title: ステップ 88
+title: Step 87
 challengeType: 0
-dashedName: step-88
+dashedName: step-87
 ---
 
 # --description--
@@ -22,7 +22,7 @@ let value = array[index];
 You should update `newWeapon` to have the value of `weapons[currentWeapon]`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
index c9206ebc2f8..af0ce0a447a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ce1dfc990134162b3bd9
-title: ステップ 89
+title: Step 88
 challengeType: 0
-dashedName: step-89
+dashedName: step-88
 ---
 
 # --description--
@@ -14,7 +14,7 @@ dashedName: step-89
 You should update `newWeapon` to have the value of `weapons[currentWeapon].name`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]\.name;/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
index 7a4936e8062..a06ea68706d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8ce73d0dce43468f6689c
-title: ステップ 90
+title: Step 89
 challengeType: 0
-dashedName: step-90
+dashedName: step-89
 ---
 
 # --description--
 
-You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `You now have a new weapon.` string to say `You now have a` and the name of the new weapon. Remember to end the sentence with a period.
+You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `"You now have a new weapon."` string to say `"You now have a "` and the name of the new weapon. Remember to end the sentence with a period.
 
-Here is an example that creates the string `Hello, our name is freeCodeCamp.`:
+Here is an example that creates the string `"Hello, our name is freeCodeCamp."`:
 
 ```js
 const ourName = "freeCodeCamp";
@@ -18,7 +18,7 @@ const ourStr = "Hello, our name is " + ourName + ".";
 
 # --hints--
 
-You should update the `text.innerText` assignment to start with the string `You now have a`.
+You should update the `text.innerText` assignment to start with the string `"You now have a "`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a \1/);
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
index 685de16eadb..4f2ed89e0ac 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cf22272d6d35af80d4ac
-title: ステップ 91
+title: Step 90
 challengeType: 0
-dashedName: step-91
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
index 953f24c738d..fddaa343d3b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d0337d7c67377a4a76c6
-title: ステップ 92
+title: Step 91
 challengeType: 0
-dashedName: step-92
+dashedName: step-91
 ---
 
 # --description--
 
 Up until now, any time `text.innerText` was updated, the old text was erased. This time, use the `+=` operator to add text to the end of `text.innerText`.
 
-Add the string `In your inventory you have:` - include the spaces at the beginning and the end.
+Add the string `" In your inventory you have: "` - include the spaces at the beginning and the end.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should use the `+=` operator to add to `text.innerText`.
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*/)
 ```
 
-You should add the string `In your inventory you have:` to the end of `text.innerText`. Mind the spaces!
+You should add the string `" In your inventory you have: "` to the end of `text.innerText`. Mind the spaces!
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
index 894af0bdc1e..d2d697233c5 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d08668fa8b38732486e9
-title: ステップ 93
+title: Step 92
 challengeType: 0
-dashedName: step-93
+dashedName: step-92
 ---
 
 # --description--
@@ -11,7 +11,7 @@ At the end of the second `text.innerText` string you just added, use the concate
 
 # --hints--
 
-You should not change the `In your inventory you have:` string.
+You should not change the `" In your inventory you have: "` string.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
index aa823aadc9e..08f3472f27d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d0c4f12c2239b6618582
-title: ステップ 94
+title: Step 93
 challengeType: 0
-dashedName: step-94
+dashedName: step-93
 ---
 
 # --description--
 
-Add an `else` statement to your `buyWeapon` function. In that statement, set `text.innerText` to equal `You do not have enough gold to buy a weapon.`.
+Add an `else` statement to your `buyWeapon` function. In that statement, set `text.innerText` to equal `"You do not have enough gold to buy a weapon."`.
 
 # --hints--
 
@@ -24,13 +24,13 @@ const split = buyWeapon.toString().split(/\s|\n/);
 assert.isAbove(split.indexOf('else'), split.indexOf('if'));
 ```
 
-You should set `text.innerText` to `You do not have enough gold to buy a weapon.`.
+You should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy a weapon.\1/);
 ```
 
-Your `else` statement should set `text.innerText` to `You do not have enough gold to buy a weapon.`.
+Your `else` statement should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 gold = 20;
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
index df907313f53..b8fe5b50826 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d0fdf2dad83a92883a80
-title: ステップ 95
+title: Step 94
 challengeType: 0
-dashedName: step-95
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
index 68355d3bbc8..0814d277818 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d143f2a58e3b6d6e9c33
-title: ステップ 96
+title: Step 95
 challengeType: 0
-dashedName: step-96
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
index f30e5e3f461..821369edf60 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d1c72e8bb13c2074d93c
-title: ステップ 97
+title: Step 96
 challengeType: 0
-dashedName: step-97
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
index c5cbc644812..5b21812459f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d2146a3e853d0a6e28ca
-title: ステップ 98
+title: Step 97
 challengeType: 0
-dashedName: step-98
+dashedName: step-97
 ---
 
 # --description--
 
-Add an `else` statement for your outer `if` statement. Inside this new `else` statement, set `text.innerText` to `You already have the most powerful weapon!`.
+Add an `else` statement for your outer `if` statement. Inside this new `else` statement, set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 # --hints--
 
@@ -18,13 +18,13 @@ const matches = buyWeapon.toString().match(/else/g);
 assert.equal(matches.length, 2);
 ```
 
-You should set `text.innerText` to `You already have the most powerful weapon!`.
+You should set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 ```js
 assert.match(buyWeapon.toString(), /('|")You already have the most powerful weapon!\1/);
 ```
 
-You should modify your `text.innerText` to `You already have the most powerful weapon!` within your outer `else` statement.
+You should modify your `text.innerText` to `"You already have the most powerful weapon!"` within your outer `else` statement.
 
 ```js
 currentWeapon = 5;
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
index a2de590e346..8adbb83ea32 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d24c97461b3ddb9397c8
-title: ステップ 99
+title: Step 98
 challengeType: 0
-dashedName: step-99
+dashedName: step-98
 ---
 
 # --description--
 
 Once a player has the most powerful weapon, you can give them the ability to sell their old weapons.
 
-In the outer `else` statement, set `button2.innerText` to `Sell weapon for 15 gold`. Also set `button2.onclick` to the function name `sellWeapon`.
+In the outer `else` statement, set `button2.innerText` to `"Sell weapon for 15 gold"`. Also set `button2.onclick` to the function name `sellWeapon`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should set the value of `button2.innerText`.
 assert.match(buyWeapon.toString(), /button2\.innerText/);
 ```
 
-You should set the value of `button2.innerText` to `Sell weapon for 15 gold`.
+You should set the value of `button2.innerText` to `"Sell weapon for 15 gold"`.
 
 ```js
 assert.match(buyWeapon.toString(), /button2\.innerText\s*=\s*('|")Sell weapon for 15 gold\1;/);
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
index 7d97b485f7b..f239b5e07bb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d2e2a073be3edb46116f
-title: ステップ 100
+title: Step 99
 challengeType: 0
-dashedName: step-100
+dashedName: step-99
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.isFunction(sellWeapon);
 `sellWeapon` should be an empty function.
 
 ```js
-assert.match(sellWeapon.toString(), /sellWeapon\(\)\s*\{\s*\}/);
+assert.match(sellWeapon.toString(), /sellWeapon\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
index ce72e456b95..3cf081b462d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d31ebbc10e3fe1b28e03
-title: ステップ 101
+title: Step 100
 challengeType: 0
-dashedName: step-101
+dashedName: step-100
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(sellWeapon.toString(), /if/);
 Your `if` statement should check if `inventory.length` is greater than `1`.
 
 ```js
-assert.match(sellWeapon.toString(), /if\s*\(inventory\.length\s*>\s*1\)/);
+assert.match(sellWeapon.toString(), /if\s*\(\s*inventory\.length\s*>\s*1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
index 88327b70751..e185edbdfe4 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d35660db4040ba292193
-title: ステップ 102
+title: Step 101
 challengeType: 0
-dashedName: step-102
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
index f9fcc3d824b..c9a8d067c6f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d382cd075f4169223e14
-title: ステップ 103
+title: Step 102
 challengeType: 0
-dashedName: step-103
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
index 8bf344c8f8d..e6174703f8c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d539dc11cb42b5dd7ec8
-title: ステップ 104
+title: Step 103
 challengeType: 0
-dashedName: step-104
+dashedName: step-103
 ---
 
 # --description--
@@ -21,19 +21,19 @@ Use the `shift()` method to take the first element from the `inventory` array an
 Your `sellWeapon` function should use the `shift()` method.
 
 ```js
-assert.match(sellWeapon.toString(), /shift\(\)/);
+assert.match(sellWeapon.toString(), /shift\(\s*\)/);
 ```
 
 You should use the `shift()` method on the `inventory` array.
 
 ```js
-assert.match(sellWeapon.toString(), /inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /inventory\.shift\(\s*\)/);
 ```
 
 You should assign the value of `inventory.shift()` to your `currentWeapon` variable.
 
 ```js
-assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
index 7eace58106f..9b5f9e125ed 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d61ddfe35744369365b7
-title: ステップ 105
+title: Step 104
 challengeType: 0
-dashedName: step-105
+dashedName: step-104
 ---
 
 # --description--
 
-After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `You sold a`, then `currentWeapon`, then the string `.`.
+After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `"You sold a "`, then `currentWeapon`, then the string `"."`.
 
 # --hints--
 
@@ -17,19 +17,19 @@ You should use the assignment operator with `text.innerText`.
 assert.match(sellWeapon.toString(), /text\.innerText\s*=/);
 ```
 
-You should add `You sold a` to `text.innerText`. Spacing is important.
+You should add `"You sold a "` to `text.innerText`. Spacing is important.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1/);
 ```
 
-You should add the value of `currentWeapon` to the `You sold a` string. Use the concatenation operator to do this on the same line.
+You should add the value of `currentWeapon` to the `"You sold a "` string. Use the concatenation operator to do this on the same line.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a\s\1\s*\+\s*\_currentWeapon/);
 ```
 
-You should add the string `.` to the value of `currentWeapon`. Use the concatenation operator to do this on the same line.
+You should add the string `"."` to the value of `currentWeapon`. Use the concatenation operator to do this on the same line.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1\s*\+\s*\_currentWeapon\s+\+\s+('|")\.\2/);
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
index b5e5ec5ab8f..59c6c536b8b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d6c7001ebc45350e3d16
-title: ステップ 106
+title: Step 105
 challengeType: 0
-dashedName: step-106
+dashedName: step-105
 ---
 
 # --description--
 
-Now use the `+=` operator to add the string `In your inventory you have:` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `In your inventory you have:` string.
+Now use the `+=` operator to add the string `" In your inventory you have: "` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `" In your inventory you have: "` string.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const matches = sellWeapon.toString().match(/text\.innerText\s*\+=/g);
 assert.equal(matches.length, 1);
 ```
 
-You should add the string `In your inventory you have:` to the second `text.innerText` line. Spacing matters.
+You should add the string `" In your inventory you have: "` to the second `text.innerText` line. Spacing matters.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*\+=\s*('|") In your inventory you have: \1/);
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
index 14ed038d920..c7dfa1f9628 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d7b8ab568b4649998954
-title: ステップ 107
+title: Step 106
 challengeType: 0
-dashedName: step-107
+dashedName: step-106
 ---
 
 # --description--
 
-Use an `else` statement to run when the `inventory` length is not more than one. Set the `text.innerText` to say `Don't sell your only weapon!`.
+Use an `else` statement to run when the `inventory` length is not more than one. Set the `text.innerText` to say `"Don't sell your only weapon!"`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ Your `sellWeapon` function should have an `else` statement.
 assert.match(sellWeapon.toString(), /else/);
 ```
 
-You should set `text.innerText` to `Don't sell your only weapon!`.
+You should set `text.innerText` to `"Don't sell your only weapon!"`.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")Don't sell your only weapon!\1/);
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
index d4a07ed6ef4..a8068715efb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d81f539f004776dd9b1e
-title: ステップ 108
+title: Step 107
 challengeType: 0
-dashedName: step-108
+dashedName: step-107
 ---
 
 # --description--
 
 Now you can start the code to fight monsters. To keep your code organized, your `fightDragon` function has been moved for you to be near the other `fight` functions.
 
-Below your `weapons` array, define a `monsters` variable and assign it an array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. The first object's values should be `slime`, `2`, and `15`, in order. The second should be `fanged beast`, `8`, and `60`. The third should be `dragon`, `20`, and `300`.
+Below your `weapons` array, define a `monsters` variable and assign it an array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. The first object's values should be `"slime"`, `2`, and `15`, in order. The second should be `"fanged beast"`, `8`, and `60`. The third should be `"dragon"`, `20`, and `300`.
 
 # --hints--
 
@@ -37,7 +37,7 @@ Your `monsters` array should have 3 objects.
 assert(monsters.every(val => typeof val === "object"));
 ```
 
-The first value in your `monsters` array should be an object with a `name` property set to `slime`.
+The first value in your `monsters` array should be an object with a `name` property set to `"slime"`.
 
 ```js
 assert.equal(monsters[0].name, "slime");
@@ -55,7 +55,7 @@ The first value in your `monsters` array should be an object with a `health` pro
 assert.equal(monsters[0].health, 15);
 ```
 
-The second value in your `monsters` array should be an object with a `name` property set to `fanged beast`.
+The second value in your `monsters` array should be an object with a `name` property set to `"fanged beast"`.
 
 ```js
 assert.equal(monsters[1].name, "fanged beast");
@@ -73,7 +73,7 @@ The second value in your `monsters` array should be an object with a `health` pr
 assert.equal(monsters[1].health, 60);
 ```
 
-The third value in your `monsters` array should be an object with a `name` property set to `dragon`.
+The third value in your `monsters` array should be an object with a `name` property set to `"dragon"`.
 
 ```js
 assert.equal(monsters[2].name, "dragon");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
index 587cf43d2b7..f21aeb538fa 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd468debb449b4454086
-title: ステップ 109
+title: Step 108
 challengeType: 0
-dashedName: step-109
+dashedName: step-108
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
index 125e3a02702..ca2db4faf54 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd9cdb16324b04cfd958
-title: ステップ 110
+title: Step 109
 challengeType: 0
-dashedName: step-110
+dashedName: step-109
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.notMatch(fightSlime.toString(), /let|const/);
 You should call the `goFight` function.
 
 ```js
-assert.match(fightSlime.toString(), /goFight\(\);/);
+assert.match(fightSlime.toString(), /goFight\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
index af772de212c..dff775b563a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8dfcf7fb1044d2f478fd1
-title: ステップ 111
+title: Step 110
 challengeType: 0
-dashedName: step-111
+dashedName: step-110
 ---
 
 # --description--
 
-Following the same pattern, use that code in the `fightBeast` and `fightDragon` functions. Remember that `beast` is at index `1` and `dragon` is at index `2`. Also, remove the `console.log` call from your `fightDragon` function.
+Following the same pattern as the `fightSlime` function, use that code in the `fightBeast` and `fightDragon` functions. Remember that `beast` is at index `1` and `dragon` is at index `2`. Also, remove the `console.log` call from your `fightDragon` function.
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
index 631ac28ee0f..fa62f97c4f9 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e0d1d0110b4ec421489f
-title: ステップ 112
+title: Step 111
 challengeType: 0
-dashedName: step-112
+dashedName: step-111
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
index 16a0d69d4f4..9ff3ee038cb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
@@ -1,20 +1,19 @@
 ---
 id: 62a8e142f7f0bd4fed898de3
-title: ステップ 113
+title: Step 112
 challengeType: 0
-dashedName: step-113
+dashedName: step-112
 ---
 
 # --description--
 
-Add a new object to the end of the `locations` array, following the same properties as the rest of the objects. Set `name` to `fight`, `button text` to an array with `Attack`, `Dodge`, and `Run`, `button functions` to an array with `attack`, `dodge`, and `goTown`, and `text` to `You are fighting a monster.`.
+Add a new object to the end of the `locations` array, following the same properties as the rest of the objects. Set `name` to `"fight"`, `"button text"` to an array with `"Attack"`, `"Dodge"`, and `"Run"`, `"button functions"` to an array with `attack`, `dodge`, and `goTown`, and `text` to `"You are fighting a monster."`.
 
 # --hints--
 
 Your `locations` array should have 4 values in it.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 4);
 ```
 
@@ -24,25 +23,25 @@ Your new value should be an object.
 assert.isObject(locations[3]);
 ```
 
-Your new object should have a `name` property set to `fight`.
+Your new object should have a `name` property set to `"fight"`.
 
 ```js
 assert.equal(locations[3].name, "fight");
 ```
 
-Your new object should have a `button text` property set to an array with the strings `Attack`, `Dodge`, and `Run`.
+Your new object should have a `"button text"` property set to an array with the strings `"Attack"`, `"Dodge"`, and `"Run"`.
 
 ```js
 assert.deepEqual(locations[3]["button text"], ["Attack", "Dodge", "Run"]);
 ```
 
-Your new object should have a `button functions` property set to an array with the variables `attack`, `dodge`, and `goTown`.
+Your new object should have a `"button functions"` property set to an array with the variables `attack`, `dodge`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[3]["button functions"], [attack, dodge, goTown]);
 ```
 
-Your new object should have a `text` property set to `You are fighting a monster.`.
+Your new object should have a `text` property set to `"You are fighting a monster."`.
 
 ```js
 assert.equal(locations[3].text, "You are fighting a monster.");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
index d9c51fc0598..1a6b6592b70 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e1dc897df55108bcb5e8
-title: ステップ 114
+title: Step 113
 challengeType: 0
-dashedName: step-114
+dashedName: step-113
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(goFight.toString(), /update/);
 You should pass the fourth object in your `locations` array to your `update` call.
 
 ```js
-assert.match(goFight.toString(), /update\(locations\[3\]\)/);
+assert.match(goFight.toString(), /update\(\s*locations\s*\[\s*3\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
index 160cf24c306..2e11e5e73a1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e21398ad61520edb724f
-title: ステップ 115
+title: Step 114
 challengeType: 0
-dashedName: step-115
+dashedName: step-114
 ---
 
 # --description--
@@ -14,13 +14,13 @@ Below your `update` call, set the `monsterHealth` to be the health of the curren
 You should use bracket notation to access the `monsters` array at the `fighting` index.
 
 ```js
-assert.match(goFight.toString(), /monsters\[fighting\]/);
+assert.match(goFight.toString(), /monsters\s*\[\s*fighting\s*\]/);
 ```
 
 You should assign the value of `monsters[fighting]` to the `monsterHealth` variable.
 
 ```js
-assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\[fighting\](\.health|\[('|")health\2\])/);
+assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\s*\[\s*fighting\s*\]\s*(\.health|\[\s*('|")health\2\s*\])/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
index 5951d2dbc49..95754b15eba 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
@@ -1,18 +1,25 @@
 ---
 id: 62a8e24c673b075317cc0b09
-title: ステップ 116
+title: Step 115
 challengeType: 0
-dashedName: step-116
+dashedName: step-115
 ---
 
 # --description--
 
-The HTML element that shows the monster's stats has been hidden with CSS. Display the `monsterStats` element by updating the `display` property of the `style` property to `block`. For example, updating the `first` property of the `name` property of `user` would look like:
+By default, the HTML element that shows the monster's stats has been hidden with CSS. When the player clicks the "Fight dragon" button, the monster's stats should be displayed. You can accomplish this by using the <dfn>style</dfn> and <dfn>display</dfn> properties on the `monsterStats` element.
+
+The `style` property is used to access the inline style of an element and the `display` property is used to set the visibility of an element.
+
+Here is an example of how to update the display for a paragraph element:
 
 ```js
-user.name.first = "Naomi";
+const paragraph = document.querySelector('p');
+paragraph.style.display = 'block';
 ```
 
+Display the `monsterStats` element by updating the `display` property of the `style` property to `block`.
+
 # --hints--
 
 You should use dot notation to access the `style` property of `monsterStats`.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
index 3c2eb28f6c0..8629818b67e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e271f8e3d1541f9624ad
-title: ステップ 117
+title: Step 116
 challengeType: 0
-dashedName: step-117
+dashedName: step-116
 ---
 
 # --description--
 
-Now, set the `innerText` property of `monsterName` to be the `name` property of the current monster. Do the same for `monsterHealthText` and the `health` property.
+Now, you will need to update the text for the current monster's name and health.
+
+Start by assigning `monsters[fighting].name` to the `innerText` property of `monsterName`. Then, assign `monsterHealth` to the `innerText` property of `monsterHealthText`.
 
 # --hints--
 
@@ -17,10 +19,10 @@ You should use dot notation to access the `innerText` property of `monsterName`.
 assert.match(goFight.toString(), /monsterName\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterName` to be the `name` value of the current monster. Remember that you can get the current monster with `monsters[fighting]`.
+You should assign `monsters[fighting].name` to `monsterName.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\[fighting\]\.name/);
+assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 You should use dot notation to access the `innerText` property of `monsterHealthText`.
@@ -29,10 +31,10 @@ You should use dot notation to access the `innerText` property of `monsterHealth
 assert.match(goFight.toString(), /monsterHealthText\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterHealthText` to be the `health` value of the current monster. You can get the current monster with `monsters[fighting]` or you can access this value using the `monsterHealth` variable that you previously assigned.
+You should assign `monsterHealth` to `monsterHealthText.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\[fighting\]\.health/);
+assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.health/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
index 8140219e6f5..c715960538e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e35675c18c56354c08cf
-title: ステップ 118
+title: Step 117
 challengeType: 0
-dashedName: step-118
+dashedName: step-117
 ---
 
 # --description--
 
-Now you can build the `attack` function. First, update the `text` message to say `The <monster name> attacks.`, replacing `<monster name>` with the name of the monster. Remember you can use the concatenation operator for this.
+Now you can build the `attack` function. First, update the `text` message to say `"The <monster name> attacks."`, replacing `<monster name>` with the name of the monster. Remember you can use the concatenation operator for this.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1/);
 You should use the concatenation operator to add the value of `monsters[fighting].name` to the `The` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 You should use the concatenation operator to add the string `attacks.` to the `monsters[fighting].name` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name\s*\+\s*('|") attacks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name\s*\+\s*('|") attacks\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
index 747aea540f5..e062f34ae25 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e41e2f190c58404dd46e
-title: ステップ 119
+title: Step 118
 challengeType: 0
-dashedName: step-119
+dashedName: step-118
 ---
 
 # --description--
 
-On a new line, add the string `You attack it with your <weapon>.` to the `text` value, replacing `<weapon>` with the player's current weapon.
+On a new line, use the addition assignment operator(`+=`), to add the string `" You attack it with your <weapon>."` to the `text` value, replacing `<weapon>` with the player's current weapon. Additionally, remember that this line of text starts with a space so it will properly display.
 
 # --hints--
 
@@ -24,7 +24,7 @@ You should use compound assignment with `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=/);
 ```
 
-You should add the string `You attack it with your` to the `text.innerText` value. Remember that spacing matters.
+You should add the string `" You attack it with your "` to the `text.innerText` value. Remember that spacing matters.
 
 ```js
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1/);
@@ -33,13 +33,13 @@ assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it wit
 You should use the concatenation operator to add the current weapon to the string. You can get the current weapon with `weapons[currentWeapon].name`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name/);
 ```
 
-You should use the concatenation operator to end your string with `.`.
+You should use the concatenation operator to end your string with `"."`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name\s*\+\s*('|")\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*\+\s*('|")\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
index 1504b392260..689a350b599 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e45cc600c3591cee671a
-title: ステップ 120
+title: Step 119
 challengeType: 0
-dashedName: step-120
+dashedName: step-119
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(attack.toString(), /health\s*-=/);
 You should subtract the monster's current level from `health`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*monsters\[fighting\]\.level/);
+assert.match(attack.toString(), /health\s*-=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
index adafb06af90..ac76865ed0a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e49f4df7af5ae2d7a616
-title: ステップ 121
+title: Step 120
 challengeType: 0
-dashedName: step-121
+dashedName: step-120
 ---
 
 # --description--
 
-Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon. Remember you have the `currentWeapon` variable and the `power` property.
+Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon.
+
+Remember that you can access the power of the player's current weapon using `weapons[currentWeapon].power`.
 
 # --hints--
 
@@ -20,19 +22,19 @@ assert.match(attack.toString(), /monsterHealth\s*-=/);
 You should use bracket notation with `currentWeapon` to access `weapons`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 You should use dot notation to access the `power` property of `weapons[currentWeapon]`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 You should subtract the `power` of the current weapon from `monsterHealth`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
index 43209f45266..01b05467403 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8e4dc6a60f85bf256a0cb
-title: ステップ 122
+title: Step 121
 challengeType: 0
-dashedName: step-122
+dashedName: step-121
 ---
 
 # --description--
 
 The `Math` object in JavaScript contains static properties and methods for mathematical constants and functions. One of those is `Math.random()`, which generates a random number from `0` (inclusive) to `1` (exclusive). Another is `Math.floor()`, which rounds a given number down to the nearest integer.
 
-Using these, you can generate a random number within a range. For example, this generates a random number between 1 and 5: `Math.floor(Math.random() * 5) + 1;`.
+Using these, you can generate a random number within a range. For example, this generates a random number between `1` and `5`: `Math.floor(Math.random() * 5) + 1;`.
 
 Following this pattern, use the addition operator (`+`) to add a random number between `1` and the value of `xp` to your `monsterHealth -= weapons[currentWeapon].power`.
 
@@ -24,7 +24,7 @@ assert.lengthOf(attack.toString().match(/monsterHealth/g), 1);
 You should add to the `weapons[currentWeapon].power` value.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+/);
 ```
 
 You should use `Math.floor()`.
@@ -42,25 +42,25 @@ assert.match(attack.toString(), /Math\.random/);
 You should multiply `Math.random()` by the value of `xp`.
 
 ```js
-assert.match(attack.toString(), /Math\.random\(\)\s*\*\s*xp/);
+assert.match(attack.toString(), /Math\.random\(\s*\)\s*\*\s*xp/);
 ```
 
 You should use `Math.floor()` to round the result of `Math.random() * xp` down.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\)\s*\*\s*xp\s*.*\)/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*.*\)/);
 ```
 
 You should add `1` to the result of `Math.floor()`.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 You should add the result of `Math.floor(Math.random() * xp) + 1` to the result of `weapons[currentWeapon].power`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
index a35d5c9b78b..4931f15d514 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ed36d7a7915dfa444ba2
-title: ステップ 123
+title: Step 122
 challengeType: 0
-dashedName: step-123
+dashedName: step-122
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
index 27be56d8b17..60667347322 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8edd05e27cc668051686f
-title: ステップ 124
+title: Step 123
 challengeType: 0
-dashedName: step-124
+dashedName: step-123
 ---
 
 # --description--
@@ -20,13 +20,13 @@ assert.match(attack.toString(), /if/);
 Your `if` statement should check if `health` is less than or equal to `0`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(health\s*<=\s*0\)/);
+assert.match(attack.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 ```
 
 Your `if` statement should call the `lose` function.
 
 ```js
-assert.match(attack.toString(), /lose\(\)/);
+assert.match(attack.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
index 4d9a5b0f5eb..881f91fdb2f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee154c8946678775c4a4
-title: ステップ 125
+title: Step 124
 challengeType: 0
-dashedName: step-125
+dashedName: step-124
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
index bf2304a676b..2929ee44bf5 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee71f018e968a056d369
-title: ステップ 126
+title: Step 125
 challengeType: 0
-dashedName: step-126
+dashedName: step-125
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(code, /function\s+defeatMonster/);
 `defeatMonster` should be an empty function.
 
 ```js
-assert.match(defeatMonster.toString(), /defeatMonster\s*\(\)\s*\{\s*\}/);
+assert.match(defeatMonster.toString(), /defeatMonster\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 You should use the `function` keyword to declare `lose`.
@@ -32,7 +32,7 @@ assert.match(code, /function\s+lose/);
 `lose` should be an empty function.
 
 ```js
-assert.match(lose.toString(), /lose\s*\(\)\s*\{\s*\}/);
+assert.match(lose.toString(), /lose\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
index 2d2804ea864..f8f57306b03 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8eec45f77bc69e8775294
-title: ステップ 127
+title: Step 126
 challengeType: 0
-dashedName: step-127
+dashedName: step-126
 ---
 
 # --description--
 
-Inside the `dodge` function, set `text.innerText` equal to the string `You dodge the attack from the <monster>`. Replace `<monster>` with the name of the monster, using the `name` property.
+Inside the `dodge` function, set `text.innerText` equal to the string `"You dodge the attack from the <monster>"`. Replace `<monster>` with the name of the monster, using the `name` property.
 
 # --hints--
 
-You should assign the string `You dodge the attack from the` to the `text.innerText` property. Remember that spacing matters.
+You should assign the string `"You dodge the attack from the "` to the `text.innerText` property. Remember that spacing matters.
 
 ```js
 assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1/);
@@ -20,7 +20,7 @@ assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack
 You should use the concatenation operator to add the name of the monster to the end of the string. You can get this with `monsters[fighting].name`.
 
 ```js
-assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
index 60ea2446ca8..e32d3bd0439 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8eefe2e68b66ac563816b
-title: ステップ 128
+title: Step 127
 challengeType: 0
-dashedName: step-128
+dashedName: step-127
 ---
 
 # --description--
 
-In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. You can get the monster's level with the `level` property.
+In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. Remember you can get the monster's level by using `monsters[fighting].level`.
 
 Here is an example of setting `num` to `num` plus `5` * `8`: `num += 5 * 8`. Use `Math.floor()` to round the result down.
 
@@ -22,13 +22,13 @@ assert.match(defeatMonster.toString(), /gold\s*\+=/);
 You should use `Math.floor()` to round the result of the monster's level times `6.7`.
 
 ```js
-assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\))/);
 ```
 
 You should add the result of `Math.floor(monsters[fighting].level * 6.7)` to `gold`.
 
 ```js
-assert.match(defeatMonster.toString(), /gold\s*\+=\s*(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /gold\s*\+=\s*((Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)))/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
index 88c9099a6da..a23344528d5 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef6a52292f6bdca4f6f8
-title: ステップ 129
+title: Step 128
 challengeType: 0
-dashedName: step-129
+dashedName: step-128
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /xp\s*\+=/);
 You should add the monster's level to `xp`.
 
 ```js
-assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\[fighting\]\.level/);
+assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
index c0d9a1ce198..d573e966cac 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef8f0c76a46cd221a68c
-title: ステップ 130
+title: Step 129
 challengeType: 0
-dashedName: step-130
+dashedName: step-129
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
index c4566cd3943..4a948c96439 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8efb0e3ce826db8daf80f
-title: ステップ 131
+title: Step 130
 challengeType: 0
-dashedName: step-131
+dashedName: step-130
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /update/);
 You should pass `locations[4]` as the argument.
 
 ```js
-assert.match(defeatMonster.toString(), /update\(locations\[4\]\)/);
+assert.match(defeatMonster.toString(), /update\(\s*locations\s*\[\s*4\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
index 032b0c3805b..76fd64bb570 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8eff21c0b0f6ebe5b8e38
-title: ステップ 132
+title: Step 131
 challengeType: 0
-dashedName: step-132
+dashedName: step-131
 ---
 
 # --description--
 
 Your `locations` array doesn't have a fifth element, so `locations[4]` doesn't work.
 
-Add a new object at the end of the `locations` array, following the same structure as the other objects. Set `name` to `kill monster`, set `button text` to an array with three `Go to town square` strings, set `button functions` to an array with three `goTown` variables, and set `text` to `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Add a new object at the end of the `locations` array, following the same structure as the other objects. Set `name` to `"kill monster"`, set `"button text"` to an array with three `"Go to town square"` strings, set `"button functions"` to an array with three `goTown` variables, and set `text` to `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 # --hints--
 
@@ -25,25 +25,25 @@ Your fifth `locations` value should be an object.
 assert.isObject(locations[4]);
 ```
 
-Your fifth `locations` value should have a `name` property with the value `kill monster`.
+Your fifth `locations` value should have a `name` property with the value `"kill monster"`.
 
 ```js
 assert.equal(locations[4].name, 'kill monster');
 ```
 
-Your fifth `locations` value should have a `button text` array with three `Go to town square` strings.
+Your fifth `locations` value should have a `"button text"` array with three `"Go to town square"` strings.
 
 ```js
 assert.deepEqual(locations[4]["button text"], ['Go to town square', 'Go to town square', 'Go to town square']);
 ```
 
-Your fifth `locations` value should have a `button functions` array with three `goTown` variables.
+Your fifth `locations` value should have a `"button functions"` array with three `goTown` variables.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, goTown]);
 ```
 
-Your fifth `locations` value should have a `text` property with the value `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Your fifth `locations` value should have a `text` property with the value `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams Arg! as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
index 0e5785739d7..42320970f45 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8f06fb318666fef69f91e
-title: ステップ 133
+title: Step 132
 challengeType: 0
-dashedName: step-133
+dashedName: step-132
 ---
 
 # --description--
 
-The word `Arg!` should have quotes around it. Besides escaping quotes, there is another way you can include quotation marks inside a string.
+The word `"Arg!"` should have quotes around it. Besides escaping quotes, there is another way you can include quotation marks inside a string.
 
-Change the double quotes around the string `The monster screams Arg! as it dies. You gain experience points and find gold.` to single quotes `'`, then add double quotes around `Arg!`.
+Change the double quotes around the string `"The monster screams Arg! as it dies. You gain experience points and find gold."` to single quotes `'`, then add double quotes around `"Arg!"`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should use single quotes around the string.
 assert.match(code, /'The monster screams "?Arg!"? as it dies. You gain experience points and find gold.'/);
 ```
 
-You should use double quotes around `Arg!`.
+You should use double quotes around `"Arg!"`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams "Arg!" as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
index 5048aea3d8e..9137e403c0b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f14fe6d1fc72454648c7
-title: ステップ 134
+title: Step 133
 challengeType: 0
-dashedName: step-134
+dashedName: step-133
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
index a9e7fdf9644..9d984dbb5a9 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f1d5f5ddbf74c07f733b
-title: ステップ 135
+title: Step 134
 challengeType: 0
-dashedName: step-135
+dashedName: step-134
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(lose.toString(), /update\(/);
 Your `update` function should have `locations[5]` for the argument.
 
 ```js
-assert.match(lose.toString(), /update\(locations\[5\]\)/);
+assert.match(lose.toString(), /update\(\s*locations\s*\[\s*5\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
index 5f949f63dbe..a4d22989a7e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f20463b324759953edad
-title: ステップ 136
+title: Step 135
 challengeType: 0
-dashedName: step-136
+dashedName: step-135
 ---
 
 # --description--
@@ -45,7 +45,7 @@ Your `restart` function should set `currentWeapon` to `0`.
 assert.match(restart.toString(), /currentWeapon\s*=\s*0/);
 ```
 
-Your `restart` function should set `inventory` to an array with the string `stick`.
+Your `restart` function should set `inventory` to an array with the string `"stick"`.
 
 ```js
 assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
@@ -54,7 +54,7 @@ assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
 Your `restart` function should call the `goTown()` function.
 
 ```js
-assert.match(restart.toString(), /goTown\(\)/);
+assert.match(restart.toString(), /goTown\(\s*\)/);
 ```
 
 You should set `goldText.innerText` to the value of `gold`.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
index 6e877fdfa1a..6e05e05b776 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f256b813a476cae51f49
-title: ステップ 138
+title: Step 137
 challengeType: 0
-dashedName: step-138
+dashedName: step-137
 ---
 
 # --description--
@@ -41,7 +41,7 @@ You should call the `winGame` function in your `if` block.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\)(\s*\})?/);
+assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\s*\)(\s*\})?/);
 ```
 
 You should add an `else` block.
@@ -55,7 +55,7 @@ Your `else` block should call the `defeatMonster` function.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\)(\s*\})?/);
+assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\s*\)(\s*\})?/);
 ```
 
 # --seed--
@@ -220,7 +220,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
index 588b70baa28..a43ddc6b3af 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
@@ -1,6 +1,6 @@
 ---
 id: 62a8f35bde1750791f58773f
-title: ステップ 139
+title: Step 139
 challengeType: 0
 dashedName: step-139
 ---
@@ -20,7 +20,7 @@ assert.match(code, /function\s+winGame/);
 Your `winGame` function should call the `update` function and pass in `locations[6]`.
 
 ```js
-assert.match(winGame.toString(), /update\s*\(\s*locations\[6\]\s*\)/);
+assert.match(winGame.toString(), /update\s*\(\s*locations\s*\[\s*6\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -185,7 +185,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
index 4b570e67e4e..f2b63a0893c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
@@ -1,13 +1,13 @@
 ---
 id: 62a94114ce0b8918b487390f
-title: ステップ 140
+title: Step 140
 challengeType: 0
 dashedName: step-140
 ---
 
 # --description--
 
-Add another object in the `locations` array. Everything should be the same as the `lose` object, except the `name` should be `win` and the `text` should be `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Add another object in the `locations` array. Everything should be the same as the `lose` object, except the `name` should be `"win"` and the `text` should be `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 # --hints--
 
@@ -23,13 +23,13 @@ Your seventh `locations` value should be an object.
 assert.isObject(locations[6]);
 ```
 
-Your seventh `locations` value should have a `name` property with the value `win`.
+Your seventh `locations` value should have a `name` property with the value `"win"`.
 
 ```js
 assert.equal(locations[6].name, 'win');
 ```
 
-Your seventh `locations` value should have a `button text` array with three `REPLAY?` strings.
+Your seventh `locations` value should have a `button text` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[6]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
@@ -41,10 +41,10 @@ Your seventh `locations` value should have a `button functions` array with three
 assert.deepEqual(locations[6]["button functions"], [restart, restart, restart]);
 ```
 
-Your seventh `locations` value should have a `text` property with the value `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Your seventh `locations` value should have a `text` property with the value `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 ```js
-assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! 🎉');
+assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! &#x1F389;');
 ```
 
 # --seed--
@@ -210,7 +210,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 --fcc-editable-region--
 ];
@@ -228,7 +228,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
index b88e0311c33..b7bad4b4074 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1cea594f152ba626b872
-title: ステップ 141
+title: Step 141
 challengeType: 0
 dashedName: step-141
 ---
@@ -16,7 +16,7 @@ Inside your `attack` function, change your `health -= monsters[fighting].level;`
 You should update your `health` line to be `health -= getMonsterAttackValue(monsters[fighting].level);`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(monsters\[fighting\]\.level\)/);
+assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)/);
 ```
 
 # --seed--
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -204,7 +204,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
index 0abc210fe80..f55432b2c36 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1d6736ba262cfa74344b
-title: ステップ 142
+title: Step 142
 challengeType: 0
 dashedName: step-142
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
index f09e8da1bd0..94bef351fd7 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1d9f535e102e4663e7a6
-title: ステップ 143
+title: Step 143
 challengeType: 0
 dashedName: step-143
 ---
@@ -22,13 +22,13 @@ assert.match(code, /const\s+hit/);
 You should use the equation `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(Math\.random\(\)\s*\*\s*xp\))/);
+assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\))/);
 ```
 
 You should set `hit` to the value of `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(code, /hit\s*=\s*\(level\s*\*\s*5\)\s*-\s*\(Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\)/);
+assert.match(code, /hit\s*=\s*\(\s*level\s*\*\s*5\s*\)\s*-\s*\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
index c0899f3eec2..1ac1b564f17 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1e3c7c3d552fb04f0f18
-title: ステップ 144
+title: Step 144
 challengeType: 0
 dashedName: step-144
 ---
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
index bd604ad45fb..4258cf8fd54 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1e8ccd579330e097ce44
-title: ステップ 145
+title: Step 145
 challengeType: 0
 dashedName: step-145
 ---
@@ -188,13 +188,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -211,7 +211,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
index 8bc26e16508..52b90e06276 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1eec891ed731db227a36
-title: ステップ 146
+title: Step 146
 challengeType: 0
 dashedName: step-146
 ---
@@ -207,13 +207,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -230,7 +230,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
index e75552a5ffe..351dab64559 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1fed3d4e873366ff3131
-title: ステップ 147
+title: Step 147
 challengeType: 0
 dashedName: step-147
 ---
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
index dd53965912d..8ac903940a1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa204c1e1d33348ff09944
-title: ステップ 148
+title: Step 148
 challengeType: 0
 dashedName: step-148
 ---
@@ -14,7 +14,7 @@ Move your `monsterHealth` assignment into your `if` block.
 You should move your `monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1` into your `if` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1/)
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
index cb87356919e..0f1429cf2ad 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
@@ -1,26 +1,26 @@
 ---
 id: 62aa20e9cf1be9358f5aceae
-title: ステップ 149
+title: Step 149
 challengeType: 0
 dashedName: step-149
 ---
 
 # --description--
 
-Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `You miss.` to the end of `text.innerText`.
+Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `" You miss."` to the end of `text.innerText`.
 
 # --hints--
 
 You should add an `else` block after your `if (isMonsterHit())` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else/)
 ```
 
-You should add the text `You miss.` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
+You should add the text `" You miss."` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
index 79a50aba3f5..d416bbb7431 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2136fc49b836dfedb959
-title: ステップ 150
+title: Step 150
 challengeType: 0
 dashedName: step-150
 ---
@@ -20,7 +20,7 @@ assert.match(code, /function\s+isMonsterHit/);
 Your `isMonsterHit` function should return the result of the comparison `Math.random() > .2`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2/);
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
index ba3ffae286b..7784c2d49de 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa21971e3b743844849985
-title: ステップ 151
+title: Step 151
 challengeType: 0
 dashedName: step-151
 ---
@@ -32,7 +32,7 @@ assert.match(isMonsterHit.toString(), /\|\|\s*health\s*<\s*20/);
 Your function should return the result of the comparison `Math.random() > .2` **or** `health < 20`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
 ```
 
 # --seed--
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
index a73302e8db3..fa6e46189de 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa21ea8d9d9f396b95dd87
-title: ステップ 152
+title: Step 152
 challengeType: 0
 dashedName: step-152
 ---
@@ -21,7 +21,7 @@ assert.lengthOf(ifs, 5);
 Your new `if` statement should check `Math.random() <= .1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\)\s*<=\s*0?\.1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*<=\s*0?\.1\s*\)/);
 ```
 
 # --seed--
@@ -186,13 +186,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -209,7 +209,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
index 02cbb1d44be..75e7e7fdc67 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa226207f33d3ad4c6f546
-title: ステップ 153
+title: Step 153
 challengeType: 0
 dashedName: step-153
 ---
 
 # --description--
 
-Use the `+=` operator to add `Your <weapon> breaks.`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
+Use the `+=` operator to add `" Your <weapon> breaks."`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
 
 # --hints--
 
@@ -21,7 +21,7 @@ assert.lengthOf(concat, 3);
 You should use the `pop` method on the `inventory` array.
 
 ```js
-assert.match(attack.toString(), /inventory\.pop\(\)/);
+assert.match(attack.toString(), /inventory\.pop\(\s*\)/);
 ```
 
 You should add `Your`, with a space before and after it, to `text.innerText`.
@@ -30,17 +30,16 @@ You should add `Your`, with a space before and after it, to `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1/);
 ```
 
-You should add the return value of `inventory.pop()` to the `Your` string.
+You should add the return value of `inventory.pop()` to the `" Your "` string.
 
 ```js
-console.log(attack.toString());
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)/);
 ```
 
-You should add `breaks.`, with a space in front of it, to the end of your string.
+You should add `" breaks."`, with a space in front of it, to the end of your string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)\s*\+\s*('|")\sbreaks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)\s*\+\s*('|")\sbreaks\.\2/);
 ```
 
 # --seed--
@@ -205,13 +204,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -228,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
index ca2dfd9e07c..cb4f98370a3 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
@@ -1,13 +1,19 @@
 ---
 id: 62aa22aba186563bcbf2c395
-title: ステップ 154
+title: Step 154
 challengeType: 0
 dashedName: step-154
 ---
 
 # --description--
 
-Remember that the increment operator `++` can be used to increase a variable's value by 1. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by 1.
+Remember that the increment operator `++` can be used to increase a variable's value by `1`. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by `1`. For example :
+
+```js
+let num = 10;
+num--;
+console.log(num); // Output: 9
+```
 
 Decrement the value of `currentWeapon` in your `if` statement, after you update the text.
 
@@ -187,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -210,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
index 4e3d74d55cd..fb08209886d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa234322d4ad3e8bce42cc
-title: ステップ 155
+title: Step 155
 challengeType: 0
 dashedName: step-155
 ---
@@ -24,19 +24,19 @@ if (firstName === "Quincy" && lastName === "Larson") {
 You should not modify your existing `if` statement.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1/);
 ```
 
 You should use the logical AND operator `&&`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&/);
 ```
 
 You should use the logical AND operator to check if `inventory.length` does not equal `1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
 ```
 
 # --seed--
@@ -201,13 +201,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
index 8e9fb4d874d..3320abac13c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2469c77b363fdb4f0e06
-title: ステップ 156
+title: Step 156
 challengeType: 0
 dashedName: step-156
 ---
@@ -28,7 +28,7 @@ assert.match(easterEgg.toString(), /update\(/);
 `easterEgg` should call the `update` function with `locations[7]` as the argument.
 
 ```js
-assert.match(easterEgg.toString(), /update\(\s*locations\[7\]\s*\)/);
+assert.match(easterEgg.toString(), /update\(\s*locations\s*\[\s*7\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
index ca329695350..bc5c75fdb1e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa252c3b1073415ba2b898
-title: ステップ 157
+title: Step 157
 challengeType: 0
 dashedName: step-157
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
index bff1415630f..c4f60b0792a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa258da314ef42ba0a1858
-title: ステップ 158
+title: Step 158
 challengeType: 0
 dashedName: step-158
 ---
@@ -211,13 +211,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -234,7 +234,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
index 0d6b2da9d82..5bcd8e739c0 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa25fcb5837d43b4d9873d
-title: ステップ 159
+title: Step 159
 challengeType: 0
 dashedName: step-159
 ---
 
 # --description--
 
-Add another object to your `locations` array. Set `name` to `easter egg`, set `button text` to an array with the strings `2`, `8`, and `Go to town square?`, set `button functions` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Add another object to your `locations` array. Set `name` to `"easter egg"`, set `"button text"` to an array with the strings `"2"`, `"8"`, and `"Go to town square?"`, set `"button functions"` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 # --hints--
 
@@ -23,25 +23,25 @@ Your eighth `locations` value should be an object.
 assert.isObject(locations[7]);
 ```
 
-Your eighth `locations` value should have a `name` property with the value `easter egg`.
+Your eighth `locations` value should have a `name` property with the value `"easter egg"`.
 
 ```js
 assert.equal(locations[7].name, "easter egg");
 ```
 
-Your eighth `locations` value should have a `button text` array with the strings `2`, `8`, and `Go to town square?`.
+Your eighth `locations` value should have a `"button text"` array with the strings `"2"`, `"8"`, and `"Go to town square?"`.
 
 ```js
 assert.deepEqual(locations[7]["button text"], ["2", "8", "Go to town square?"]);
 ```
 
-Your eighth `locations` value should have a `button functions` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
+Your eighth `locations` value should have a `"button functions"` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[7]["button functions"], [pickTwo, pickEight, goTown]);
 ```
 
-Your eighth `locations` value should have a `text` property with the value `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Your eighth `locations` value should have a `text` property with the value `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 ```js
 assert.equal(locations[7].text, "You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!");
@@ -209,13 +209,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
 --fcc-editable-region--
 
@@ -235,7 +235,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
index 0f6395ef42d..144e384890e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2626c3c10244b94c787b
-title: ステップ 160
+title: Step 160
 challengeType: 0
 dashedName: step-160
 ---
@@ -14,7 +14,7 @@ Inside `pick`, use `const` to initialize a variable named `numbers` and set it t
 Your `pick` function should initialize `numbers` to an empty array `[]`.
 
 ```js
-assert.match(pick.toString(), /numbers\s*=\s*\[\]/);
+assert.match(pick.toString(), /numbers\s*=\s*\[\s*\]/);
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
index 09b4845a199..690b9c4efd5 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa264d23cdaa45a20efada
-title: ステップ 161
+title: Step 161
 challengeType: 0
 dashedName: step-161
 ---
@@ -195,13 +195,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
index eb16cdefecd..c7319b7da11 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa26cca3cd3d46c431e73b
-title: ステップ 162
+title: Step 162
 challengeType: 0
 dashedName: step-162
 ---
@@ -20,13 +20,13 @@ assert.match(pick.toString(), /numbers\.push\(/);
 You should use `Math.floor(Math.random() * 11)` to create the random number.
 
 ```js
-assert.match(pick.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)/);
+assert.match(pick.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)/);
 ```
 
 You should `push` the result of `Math.floor(Math.random() * 11)` to the end of the `numbers` array.
 
 ```js
-assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)\s*\)/);
+assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
index 4498e1605b1..50ee79091f1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
@@ -1,29 +1,29 @@
 ---
 id: 62aa27227399d647e1c37a3c
-title: ステップ 163
+title: Step 163
 challengeType: 0
 dashedName: step-163
 ---
 
 # --description--
 
-After the `while` loop, set `text.innerText` to equal `You picked <someGuess>. Here are the random numbers:`. Replace `<someGuess>` with the `guess` function parameter.
+After the `while` loop, set `text.innerText` to equal `"You picked <someGuess>. Here are the random numbers:"`. Replace `<someGuess>` with the `guess` function parameter.
 
 # --hints--
 
-You should set `text.innerText` to the string `You picked`. Remember that spacing matters.
+You should set `text.innerText` to the string `"You picked "`. Remember that spacing matters.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1/);
 ```
 
-You should use the concatenation operator to add the value of the `guess` parameter to your `You picked` string.
+You should use the concatenation operator to add the value of the `guess` parameter to your `"You picked "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess/);
 ```
 
-You should use the concatenation operator to add the string `. Here are the random numbers:` to your `"You picked " + guess` string.
+You should use the concatenation operator to add the string `". Here are the random numbers:"` to your `"You picked " + guess` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\2/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
index f0031063cb2..b5c0ff67275 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa27560def7048d7b4a095
-title: ステップ 164
+title: Step 164
 challengeType: 0
 dashedName: step-164
 ---
@@ -11,7 +11,7 @@ At the end of the string, before the final quote, insert the new line escape cha
 
 # --hints--
 
-You should add the new line escape character `\n` to your `. Here are the random numbers:` string.
+You should add the new line escape character `\n` to your `". Here are the random numbers: "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\\n\2/);
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
index 76619e837b0..4cfce9c5908 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa27c40ca6f04ab8be5fac
-title: ステップ 165
+title: Step 165
 challengeType: 0
 dashedName: step-165
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -214,7 +214,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
index 783425ff135..1f2ce1ffbfa 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa28032d863d4bd8058799
-title: ステップ 166
+title: Step 166
 challengeType: 0
 dashedName: step-166
 ---
@@ -11,7 +11,7 @@ dashedName: step-166
 
 The initialization expression is executed only once, before the loop starts, and is often used to define and set up the loop variable. Think of it like declaring a counter to use in your loop.
 
-Many `for` loops use `i` as the counter and start from 0, so change `let x = 1;` to `let i = 0;`.
+Many `for` loops use `i` as the counter and start from `0`, so change `let x = 1;` to `let i = 0;`.
 
 # --hints--
 
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
index 9a19550ed8e..82b517528b7 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa287434dc284cea01157c
-title: ステップ 167
+title: Step 167
 challengeType: 0
 dashedName: step-167
 ---
@@ -9,7 +9,7 @@ dashedName: step-167
 
 The second statement in a `for` loop, the condition statement, is evaluated at the beginning of every loop iteration. The loop will continue as long as the condition evaluates to be true.
 
-We want the loop to run 10 times, so change `x < 5` to `i < 10`.
+We want the loop to run `10` times, so change `x < 5` to `i < 10`.
 
 # --hints--
 
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
index b8349d42119..d87e5e62858 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa28bbd6323e4dfb3ac43e
-title: ステップ 168
+title: Step 168
 challengeType: 0
 dashedName: step-168
 ---
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
index 09dfbb3972d..71875c1a0ea 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa28fb651bf14efa2dbb16
-title: ステップ 169
+title: Step 169
 challengeType: 0
 dashedName: step-169
 ---
@@ -20,20 +20,19 @@ assert.match(pick.toString(), /text\.innerText\s*\+=/);
 You should use bracket notation to access `numbers[i]`.
 
 ```js
-assert.match(pick.toString(), /numbers\[i\]/);
+assert.match(pick.toString(), /numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add `numbers[i]` to your `text.innerText` value.
 
 ```js
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add a new-line character after the `numbers[i]` value. Remember that you can do this with `\n`.
 
 ```js
-console.log(pick.toString());
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]\s*\+\s*('|")\\n\1/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]\s*\+\s*('|")\\n\1/);
 ```
 
 # --seed--
@@ -198,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
index 545328ffadf..5d2de454974 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2943669c9d5026af6985
-title: ステップ 170
+title: Step 170
 challengeType: 0
 dashedName: step-170
 ---
@@ -198,13 +198,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
index d804de6bfeb..659e9a1e4b1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
@@ -1,17 +1,17 @@
 ---
 id: 62aa2999ec27ec516655eba6
-title: ステップ 171
+title: Step 171
 challengeType: 0
 dashedName: step-171
 ---
 
 # --description--
 
-Inside the `if` statement, add the string `Right! You win 20 gold!` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
+Inside the `if` statement, add the string `"Right! You win 20 gold!"` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
 
 # --hints--
 
-You should use compound assignment to add the string `Right! You win 20 gold!` to the end of `text.innerText`.
+You should use compound assignment to add the string `"Right! You win 20 gold!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Right! You win 20 gold!\1/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
index 54fce8dcb87..b0868a55bf0 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa29d8f8f88152c91350ca
-title: ステップ 172
+title: Step 172
 challengeType: 0
 dashedName: step-172
 ---
 
 # --description--
 
-Now add an `else` statement. Inside, add `Wrong! You lose 10 health!` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
+Now add an `else` statement. Inside, add `"Wrong! You lose 10 health!"` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should add an `else` block.
 assert.match(pick.toString(), /else\s*\{/);
 ```
 
-Your `else` block should use compound assignment to add `Wrong! You lose 10 health!` to the end of `text.innerText`.
+Your `else` block should use compound assignment to add `"Wrong! You lose 10 health!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Wrong! You lose 10 health!\1/);
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -226,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
index e71b3c02180..650fe59ddd1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2aec2f09d454253aad6c
-title: ステップ 173
+title: Step 173
 challengeType: 0
 dashedName: step-173
 ---
@@ -27,7 +27,7 @@ assert.match(pick.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 Your `if` statement should call the `lose` function.
 
 ```js
-assert.match(pick.toString(), /lose\(\)/);
+assert.match(pick.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
@@ -192,13 +192,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -221,7 +221,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
index 455286f4365..ebf70ca3d06 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
@@ -1,19 +1,19 @@
 ---
 id: 62aa2ba9cd881355a6f0a5a8
-title: ステップ 174
+title: Step 174
 challengeType: 0
 dashedName: step-174
 ---
 
 # --description--
 
-Looking at your `kill monster` object, `button functions` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `button text`.
+Looking at your `"kill monster"` object, `"button functions"` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `"button text"`.
 
 With this, your RPG game is complete! You can now play around - can you defeat the dragon?
 
 # --hints--
 
-You should update your fifth `locations` object to have a `button functions` property of `[goTown, goTown, easterEgg]`.
+You should update your fifth `locations` object to have a `"button functions"` property of `[goTown, goTown, easterEgg]`.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, easterEgg]);
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
@@ -557,13 +557,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
index d22dca9e911..f3d11a95837 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
@@ -1,13 +1,13 @@
 ---
 id: 62ba17beef16c563069a65d8
-title: ステップ 137
+title: Step 136
 challengeType: 0
-dashedName: step-137
+dashedName: step-136
 ---
 
 # --description--
 
-In the `locations` array, add another object at the end. Set the `name` property to `lose`, set `button text` to an array with three `REPLAY?` strings, set `button functions` to an array with three `restart` variables, and set `text` to `You die. ☠️`. You can copy that text to use the emote.
+In the `locations` array, add another object at the end. Set the `name` property to `"lose"`, set `"button text"` to an array with three `"REPLAY?"` strings, set `"button functions"` to an array with three `restart` variables, and set `text` to `"You die. &#x2620;"`.
 
 # --hints--
 
@@ -23,28 +23,28 @@ Your sixth `locations` value should be an object.
 assert.isObject(locations[5]);
 ```
 
-Your sixth `locations` value should have a `name` property with the value `lose`.
+Your sixth `locations` value should have a `name` property with the value `"lose"`.
 
 ```js
 assert.equal(locations[5].name, 'lose');
 ```
 
-Your sixth `locations` value should have a `button text` array with three `REPLAY?` strings.
+Your sixth `locations` value should have a `"button text"` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[5]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
 ```
 
-Your sixth `locations` value should have a `button functions` array with three `restart` variables.
+Your sixth `locations` value should have a `"button functions"` array with three `restart` variables.
 
 ```js
 assert.deepEqual(locations[5]["button functions"], [restart, restart, restart]);
 ```
 
-Your sixth `locations` value should have a `text` property with the value `You die. ☠️`.
+Your sixth `locations` value should have a `text` property with the value `"You die. &#x2620;"`.
 
 ```js
-assert.equal(locations[5].text, 'You die. ☠️');
+assert.equal(locations[5].text, 'You die. &#x2620;');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
index 1e6c61aaced..393c0943049 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
@@ -17,7 +17,7 @@ You should declare a `button2` variable with `const`.
 assert.match(code, /const\s+button2/);
 ```
 
-Your `button2` variable should have the value of your `#button2` element.
+Your `button2` variable should have the value of your `"#button2"` element.
 
 ```js
 assert.deepEqual(button2, document.querySelector('#button2'));
@@ -29,7 +29,7 @@ You should declare a `button3` variable with `const`.
 assert.match(code, /const\s+button3/);
 ```
 
-Your `button3` variable should have the value of your `#button3` element.
+Your `button3` variable should have the value of your `"#button3"` element.
 
 ```js
 assert.deepEqual(button3, document.querySelector('#button3'));
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
new file mode 100644
index 00000000000..432c7be3420
--- /dev/null
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
@@ -0,0 +1,356 @@
+---
+id: 65b2f6acce65b7a69751a090
+title: Step 138
+challengeType: 0
+dashedName: step-138
+---
+
+# --description--
+
+In order for the `&#x2620;` emoticon text to properly display on the page, you will need to use the <dfn>innerHTML</dfn> property.
+
+The `innerHTML` property allows you to access or modify the content inside an HTML element using JavaScript.
+
+Here is an example of updating the content for this paragraph element using the `innerHTML`  property.
+
+```html
+<p id="demo">This is a paragraph.</p>
+```
+
+```js
+document.querySelector("#demo").innerHTML = "Hello, innerHTML!";
+```
+
+In the `update` function, change `text.innerText` to `text.innerHTML`.
+
+# --hints--
+
+
+You should use dot notation to access the `innerHTML` property of `text`.
+
+```js
+assert.match(code, /text\.innerHTML/);
+```
+
+You should not use `let` or `const` to access the `innerHTML` property of `text`.
+
+```js
+assert.notMatch(code, /(let|const)\s+text.innerHTML/);
+```
+
+You should set `innerHTML` equal to the `text` property of `location`.
+
+```js
+assert.match(code, /text\.innerHTML\s*=\s*location\.text/);
+```
+
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <link rel="stylesheet" href="./styles.css">
+    <title>RPG - Dragon Repeller</title>
+  </head>
+  <body>
+    <div id="game">
+      <div id="stats">
+        <span class="stat">XP: <strong><span id="xpText">0</span></strong></span>
+        <span class="stat">Health: <strong><span id="healthText">100</span></strong></span>
+        <span class="stat">Gold: <strong><span id="goldText">50</span></strong></span>
+      </div>
+      <div id="controls">
+        <button id="button1">Go to store</button>
+        <button id="button2">Go to cave</button>
+        <button id="button3">Fight dragon</button>
+      </div>
+      <div id="monsterStats">
+        <span class="stat">Monster Name: <strong><span id="monsterName"></span></strong></span>
+        <span class="stat">Health: <strong><span id="monsterHealth"></span></strong></span>
+      </div>
+      <div id="text">
+        Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.
+      </div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+body {
+  background-color: #0a0a23;
+}
+
+#text {
+  background-color: #0a0a23;
+  color: #ffffff;
+  padding: 10px;
+}
+
+#game {
+  max-width: 500px;
+  max-height: 400px;
+  background-color: #ffffff;
+  color: #ffffff;
+  margin: 30px auto 0px;
+  padding: 10px;
+}
+
+#controls,
+#stats {
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #0a0a23;
+}
+
+#monsterStats {
+  display: none;
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #ffffff;
+  background-color: #c70d0d;
+}
+
+.stat {
+  padding-right: 10px;
+}
+
+button {
+  cursor: pointer;
+  color: #0a0a23;
+  background-color: #feac32;
+  background-image: linear-gradient(#fecc4c, #ffac33);
+  border: 3px solid #feac32;
+}
+```
+
+```js
+let xp = 0;
+let health = 100;
+let gold = 50;
+let currentWeapon = 0;
+let fighting;
+let monsterHealth;
+let inventory = ["stick"];
+
+const button1 = document.querySelector('#button1');
+const button2 = document.querySelector("#button2");
+const button3 = document.querySelector("#button3");
+const text = document.querySelector("#text");
+const xpText = document.querySelector("#xpText");
+const healthText = document.querySelector("#healthText");
+const goldText = document.querySelector("#goldText");
+const monsterStats = document.querySelector("#monsterStats");
+const monsterName = document.querySelector("#monsterName");
+const monsterHealthText = document.querySelector("#monsterHealth");
+const weapons = [
+  { name: 'stick', power: 5 },
+  { name: 'dagger', power: 30 },
+  { name: 'claw hammer', power: 50 },
+  { name: 'sword', power: 100 }
+];
+const monsters = [
+  {
+    name: "slime",
+    level: 2,
+    health: 15
+  },
+  {
+    name: "fanged beast",
+    level: 8,
+    health: 60
+  },
+  {
+    name: "dragon",
+    level: 20,
+    health: 300
+  }
+]
+const locations = [
+  {
+    name: "town square",
+    "button text": ["Go to store", "Go to cave", "Fight dragon"],
+    "button functions": [goStore, goCave, fightDragon],
+    text: "You are in the town square. You see a sign that says \"Store\"."
+  },
+  {
+    name: "store",
+    "button text": ["Buy 10 health (10 gold)", "Buy weapon (30 gold)", "Go to town square"],
+    "button functions": [buyHealth, buyWeapon, goTown],
+    text: "You enter the store."
+  },
+  {
+    name: "cave",
+    "button text": ["Fight slime", "Fight fanged beast", "Go to town square"],
+    "button functions": [fightSlime, fightBeast, goTown],
+    text: "You enter the cave. You see some monsters."
+  },
+  {
+    name: "fight",
+    "button text": ["Attack", "Dodge", "Run"],
+    "button functions": [attack, dodge, goTown],
+    text: "You are fighting a monster."
+  },
+  {
+    name: "kill monster",
+    "button text": ["Go to town square", "Go to town square", "Go to town square"],
+    "button functions": [goTown, goTown, goTown],
+    text: 'The monster screams "Arg!" as it dies. You gain experience points and find gold.'
+  },
+  {
+    name: "lose",
+    "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
+    "button functions": [restart, restart, restart],
+    text: "You die. &#x2620;"
+  }
+
+];
+
+// initialize buttons
+button1.onclick = goStore;
+button2.onclick = goCave;
+button3.onclick = fightDragon;
+
+function update(location) {
+  --fcc-editable-region--
+  monsterStats.style.display = "none";
+  button1.innerText = location["button text"][0];
+  button2.innerText = location["button text"][1];
+  button3.innerText = location["button text"][2];
+  button1.onclick = location["button functions"][0];
+  button2.onclick = location["button functions"][1];
+  button3.onclick = location["button functions"][2];
+  text.innerText = location.text;
+  --fcc-editable-region--
+}
+
+function goTown() {
+  update(locations[0]);
+}
+
+function goStore() {
+  update(locations[1]);
+}
+
+function goCave() {
+  update(locations[2]);
+}
+
+function buyHealth() {
+  if (gold >= 10) {
+    gold -= 10;
+    health += 10;
+    goldText.innerText = gold;
+    healthText.innerText = health;
+  } else {
+    text.innerText = "You do not have enough gold to buy health.";
+  }
+}
+
+function buyWeapon() {
+  if (currentWeapon < weapons.length - 1) {
+    if (gold >= 30) {
+      gold -= 30;
+      currentWeapon++;
+      goldText.innerText = gold;
+      let newWeapon = weapons[currentWeapon].name;
+      text.innerText = "You now have a " + newWeapon + ".";
+      inventory.push(newWeapon);
+      text.innerText += " In your inventory you have: " + inventory;
+    } else {
+      text.innerText = "You do not have enough gold to buy a weapon.";
+    }
+  } else {
+    text.innerText = "You already have the most powerful weapon!";
+    button2.innerText = "Sell weapon for 15 gold";
+    button2.onclick = sellWeapon;
+  }
+}
+
+function sellWeapon() {
+  if (inventory.length > 1) {
+    gold += 15;
+    goldText.innerText = gold;
+    let currentWeapon = inventory.shift();
+    text.innerText = "You sold a " + currentWeapon + ".";
+    text.innerText += " In your inventory you have: " + inventory;
+  } else {
+    text.innerText = "Don't sell your only weapon!";
+  }
+}
+
+function fightSlime() {
+  fighting = 0;
+  goFight();
+}
+
+function fightBeast() {
+  fighting = 1;
+  goFight();
+}
+
+function fightDragon() {
+  fighting = 2;
+  goFight();
+}
+
+function goFight() {
+  update(locations[3]);
+  monsterHealth = monsters[fighting].health;
+  monsterStats.style.display = "block";
+  monsterName.innerText = monsters[fighting].name;
+  monsterHealthText.innerText = monsterHealth;
+}
+
+function attack() {
+  text.innerText = "The " + monsters[fighting].name + " attacks.";
+  text.innerText += " You attack it with your " + weapons[currentWeapon].name + ".";
+  health -= monsters[fighting].level;
+  monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1;
+  healthText.innerText = health;
+  monsterHealthText.innerText = monsterHealth;
+   if (health <= 0) {
+    lose();
+  } else if (monsterHealth <= 0) {
+    if (fighting === 2) {
+      winGame();
+    } else {
+      defeatMonster();
+    }
+  }
+}
+
+function dodge() {
+  text.innerText = "You dodge the attack from the " + monsters[fighting].name;
+}
+
+function defeatMonster() {
+  gold += Math.floor(monsters[fighting].level * 6.7);
+  xp += monsters[fighting].level;
+  goldText.innerText = gold;
+  xpText.innerText = xp;
+  update(locations[4]);
+}
+
+function lose() {
+  update(locations[5]);
+}
+
+function restart() {
+  xp = 0;
+  health = 100;
+  gold = 50;
+  currentWeapon = 0;
+  inventory = ["stick"];
+  goldText.innerText = gold;
+  healthText.innerText = health;
+  xpText.innerText = xp;
+  goTown();
+}
+```
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
index 4b2605e5c18..9e7ca547f91 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
@@ -22,21 +22,21 @@ You should use bracket notation to access the property of `totalCountPerProduct`
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 You should use the assignment operator to update the value of the property of `totalCountPerProduct` that corresponds to `dessert.id`.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=/);
 ```
 
 You should update the value of `totalCountPerProduct` to be the current value plus one.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\+\s*1/);
 ```
 
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
index 9e48519ad55..36535604433 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
@@ -17,28 +17,28 @@ You should wrap your right-hand `totalCountPerProduct[dessert.id]` in parenthese
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 You should use the `||` operator.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*/);
 ```
 
 You should use `0` as your fallback value.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
 ```
 
 You should still add `1` to the value.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
index fbb0a4b43ad..b5580273e3e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
@@ -29,7 +29,7 @@ You should assign the value of `totalCountPerProduct[product.id]` to `currentPro
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\[product\.id\]/);
+assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\s*\[\s*product\.id\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
index d7366bca732..bcc15435fab 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
@@ -32,7 +32,7 @@ assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*
 You should add an empty callback function to the event listener. Remember to give it an `event` parameter.
 
 ```js
-assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*\s*\}\s*\)/);
+assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*;?\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
index f22e7600a37..83ac203de2f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
@@ -53,7 +53,7 @@ Your `reduce` call should have an initial value of `0`.
 
 ```js
 const afterCalculateTotal = code.split('calculateTotal')[1];
-assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(total,\s*item\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
+assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(\s*total,\s*item\s*\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
index e9bfec1f21e..618fd7d02d2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
@@ -37,7 +37,6 @@ assert.match(afterCalculateTaxes, /amount\s*\*\s*\(\s*this\s*\.\s*taxRate\s*\/\s
 Your `calculateTaxes` method should return the value of the `taxRate` (divided by 100, to convert it to a percent) multiplied by the `amount` parameter.
 
 ```js
-console.log(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 assert.equal(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 ```
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
index 2438ef336a1..d3ae6fe5b4a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
@@ -19,37 +19,37 @@ Start by accessing the `#playlist-songs`, `#play`, and `#pause` elements with th
 You should use `document.getElementById()` to get the `#playlist-songs` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should assign the `#playlist-songs` element to the variable `playlistSongs`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#play` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should assign the `#play` element to the variable `playButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#pause` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 You should assign the `#pause` element to the variable `pauseButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
index e354017b471..a8cfb1ae727 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
@@ -16,37 +16,37 @@ Assign them to variables named `nextButton`, `previousButton`, and `shuffleButto
 You should use `document.getElementById()` to get the `#next` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should assign the `#next` element to the variable `nextButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#previous` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should assign the `#previous` element to the variable `previousButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#shuffle` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 You should assign the `#shuffle` element to the variable `shuffleButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
index 982dd41dba2..936ce8b83e3 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
@@ -18,13 +18,13 @@ Use `const` to create a variable named `audio` and set it equal to `new Audio()`
 You should use the `new` keyword to create an instance of the `Audio` object.
 
 ```js
-assert.match(code, /new\s+Audio\(\);?/)
+assert.match(code, /new\s+Audio\(\s*\);?/)
 ```
 
 You should assign the `Audio` object to a constant named `audio`.
 
 ```js
-assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\);?/)
+assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
index b3a1505b038..4b4e82ac376 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
@@ -34,7 +34,7 @@ assert.match(code, /userData\?\.songs\.find\(/)
 Your `find` method should have `song` as the parameter of its arrow function callback.
 
 ```js
-assert.match(code, /userData\?\.songs\.find\(\(?song\)?/)
+assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 Your `find` method should use strict equality to check if `song.id` is equal to `id`.
@@ -46,7 +46,7 @@ assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(so
 Your `find` method should be assigned to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\);?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
index 05c0796a354..58f8be4f960 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
@@ -13,22 +13,22 @@ Also, set the `audio.title` property equal to `song.title`. This tells the audio
 
 # --hints--
 
-You should not modify the exist `playSong` function and its content.
+You should not modify the existing `playSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?/)
 ```
 
 You should set `audio.src` to `song.src`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?/)
 ```
 
 You should set `audio.title` to `song.title`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
index bb3c2cbe080..112682690c1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
@@ -17,13 +17,13 @@ Add an `if` statement to check whether the `userData?.currentSong` is `null` or
 You should create an `if` statement with the condition `userData?.currentSong === null || userData?.currentSong.id !== song.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*/)
 ```
 
 You should set `audio.currentTime` to `0` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
index 6b0d2528ce3..9826746f873 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
@@ -11,9 +11,11 @@ You need to update the current song being played as well as the appearance of th
 
 Start by accessing the `userData` object and its `currentSong` property. Set its value equal to the `song` variable.
 
+*Note*: You should not use the optional chaining operator `?.` in this step because `userData.currentSong` will not be `null` or `undefined` at this point.
+
 # --hints--
 
-You should set `userData.currentSong` to `song`.
+You should assign `song` to `userData.currentSong`.
 
 ```js
 assert.match(code, /userData\.currentSong\s*=\s*song;?/)
@@ -614,7 +616,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   --fcc-editable-region--
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
index 6ccbece8292..152bbd07996 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
@@ -7,9 +7,9 @@ dashedName: step-33
 
 # --description--
 
-You need to hook up the `playSong` function to a `click` event listener so the songs will start playing when the play button is clicked.
+In previous steps you built out the functionality for playing a song. Now you need to add the functionality to the play button so that it will play the current song when it is clicked on.
 
-Add a click event listener to the `playButton` element, then use arrow syntax to pass in a callback with an empty pair of curly braces.
+Use the `addEventListener()` method and pass in a `click` event for the first argument and an empty callback function with arrow syntax for the second argument, e.g., `() => {}`.
 
 # --hints--
 
@@ -22,13 +22,13 @@ assert.match(code, /playButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback into your event listener. Don't forget you also need an empty pair of curly braces.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
index 018a53ad288..7b54f7e447a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+songsHTML/);
 You should assign `array.map()` to your `songsHTML`.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\)/);
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
index f2db4f594b9..841616d82b7 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
@@ -32,7 +32,7 @@ assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\
 You should interpolate `song.title` as the content of your `span` element.
 
 ```js
-assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\$\{song\.title\}\s*<\/span>\s*<\/button>/)
+assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\s*\$\{\s*song\.title\s*\}\s*<\/span>\s*<\/button>/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
index c2416b2d4b1..dd5a6dfba69 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
@@ -24,7 +24,7 @@ assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*/)
 Your button element should have an `aria-label` attribute with the value `Delete ${song.title}` as its second attribute and value.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2\s*>/)
 ```
 
 You should paste in the provided `svg` as the content of your `button` element.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
index 39315ac84b8..edf6d2fab54 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
@@ -24,7 +24,7 @@ Chain the `join()` method to your `map()` method and pass in an empty string for
 You should add `join("")` to the existing code.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\)\s*\.join\(('|")\3\);?/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\s*\)\s*\.join\(\s*('|")\3\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
index 14ff83b5f0b..16b5d57dd71 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
@@ -35,7 +35,7 @@ Call the `renderSongs` function with the `songs` property of `userData`. This wi
 You should call your `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /renderSongs\(userData\?\.songs\)/)
+assert.match(code, /renderSongs\(\s*userData\?\.songs\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
index 8f1ea10563a..481bd7cae90 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
@@ -9,20 +9,20 @@ dashedName: step-34
 
 Within the arrow function of the event listener, add an `if` to check if `userData?.currentSong` is `null`.
 
-Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData.songs` array. This will ensure the first song in the playlist is played first.
+Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData?.songs` array. This will ensure the first song in the playlist is played first.
 
 # --hints--
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
index 1ce11518ce0..ccee65ab048 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
@@ -16,20 +16,20 @@ This ensures that the currently playing song will continue to play when the play
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` block to your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.currentSong.id` in the `else` block of your `if` statement.
 
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*playSong\(userData\?\.currentSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*playSong\(\s*userData\?\.currentSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -627,7 +627,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
index bbc58cc10ad..fd4c6a1c3fa 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
@@ -28,13 +28,13 @@ assert.isFunction(pauseSong)
 Your `pauseSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `pauseSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
index b6954b6abec..f434ed5177e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
@@ -9,15 +9,17 @@ dashedName: step-38
 
 To store the current time of the song when it is paused, set the `songCurrentTime` of the `userData` object to the `currentTime` of the `audio` variable.
 
+*Note*: You should not use optional chaining for this step because `userData.songCurrentTime` will not be `null` or `undefined` at this point.
+
 # --hints--
 
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
-You should set `userData.songCurrentTime` to `audio.currentTime`.
+You should assign `audio.currentTime` to `userData.songCurrentTime`.
 
 ```js
 assert.match(code, /userData\.songCurrentTime\s*=\s*audio\.currentTime;?/)
@@ -618,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
index be4bd6c8692..a348d78a4ad 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
@@ -16,19 +16,19 @@ To finally pause the song, use the `pause()` method on the `audio` variable. `pa
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `classList` property and the `remove()` method to remove the class `playing` from the `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.remove\(('|")playing\1\);?/)
+assert.match(code, /playButton\.classList\.remove\(\s*('|")playing\1\s*\);?/)
 ```
 
 You should use the `pause()` method on your `audio` variable.
 
 ```js
-assert.match(code, /audio\.pause\(\)/)
+assert.match(code, /audio\.pause\(\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
index 4752148ef4a..019e43eb2b3 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
@@ -22,13 +22,13 @@ assert.match(code, /pauseButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `pauseSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1,\s*pauseSong\)/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1,\s*pauseSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
index bf60e4248c8..12f7e72e4b0 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
@@ -16,13 +16,13 @@ To finally play the song, use the `play()` method on the `audio` variable. `play
 You should use the `classList` property and the `add` method to add the class `playing` to `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.add\(("|')playing\1\);?/)
+assert.match(code, /playButton\.classList\.add\(\s*("|')playing\1\s*\);?/)
 ```
 
 You should use the `play()` method on the `audio` variable.
 
 ```js
-assert.match(code, /audio\.play\(\);?/)
+assert.match(code, /audio\.play\(\s*\);?/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
 
   userData.currentSong = song;
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
index 975d08a0a62..1b1682f7a48 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
@@ -28,13 +28,13 @@ assert.isFunction(playNextSong)
 Your `playNextSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playNextSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
index 25c110a289e..3cdd86d97be 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
@@ -9,30 +9,30 @@ dashedName: step-44
 
 Inside the `playNextSong` function, create an `if` statement to check if the `currentSong` of `userData` is strictly equal to `null`. This will check if there's no current song playing in the `userData` object.
 
-If the condition is true, call the `playSong` function with the `id` of the first song in the `userData.songs` array as an argument.
+If the condition is true, call the `playSong` function with the `id` of the first song in the `userData?.songs` array as an argument.
 
 # --hints--
 
 You should not modify the existing `playNextSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside the `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
index f9afc0bbd03..e955a74d236 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
@@ -14,25 +14,25 @@ Add an `else` block to the `if` statement. Inside the `else` block, call the `ge
 You should not modify the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` to the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 You should set the `currentSongIndex` constant to `getCurrentSongIndex()` inside the `else` block.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*\}/)
 ```
 
 
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -678,7 +678,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
index c0554657cf1..ab5d73205e4 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
@@ -18,25 +18,25 @@ Lastly, call the `playSong` function and pass in `nextSong.id` as the argument.
 You should not modify the existing `if` statement, its `else` block, and content.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex + 1]` to a `nextSong` constant.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `nextSong.id`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*playSong\(nextSong\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*playSong\(\s*nextSong\.id\s*\);?\s*\}/)
 ```
 
 
@@ -635,7 +635,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
index 87dba0cd789..66b9cd106b2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
@@ -22,13 +22,13 @@ assert.match(code, /nextButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playNextSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1,\s*playNextSong\)/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1,\s*playNextSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -675,7 +675,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
index 24c9f12fed4..8e42b1d74f1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
@@ -26,13 +26,13 @@ assert.isFunction(playPreviousSong)
 Your `playPreviousSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playPreviousSong` function should be empty.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
index 832831bad11..94283e56472 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
@@ -16,31 +16,31 @@ Inside the `else` block, create a constant named `currentSongIndex` and assign i
 You should not alter the existing `playPreviousSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should have an `if` statement with the condition `userData?.currentSong === null` inside your `playPreviousSong` function.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*/)
 ```
 
 You should have `return` inside the block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
 ```
 
 You should call `getCurrentSongIndex` and assign it to `currentSongIndex` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -695,7 +695,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
index a1b36f8c83f..1df49c0f66e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
@@ -14,19 +14,19 @@ To get the previous song, subtract `1` from the `currentSongIndex` of `userData?
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex - 1]` to a `previousSong` constant.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `previousSong.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*playSong\(previousSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*playSong\(\s*previousSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
index 2f0f27fc750..be35325cc71 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
@@ -20,13 +20,13 @@ assert.match(code, /previousButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playPreviousSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1,\s*playPreviousSong\)/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1,\s*playPreviousSong\s*\)/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
index e179adc29aa..cb39a9f0995 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
@@ -28,19 +28,19 @@ assert.isFunction(highlightCurrentSong)
 Your `highlightCurrentSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*/)
 ```
 
 You should create a `playlistSongElements` constant inside your `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
 ```
 
 You should use the `querySelectorAll()` method to select the `.playlist-song` element and assign it to the `playlistSongElements` constant.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*\};?/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
index 5958597a607..ac3b42ea180 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
@@ -22,7 +22,7 @@ assert.isFunction(getCurrentSongIndex);
 Your `getCurrentSongIndex` function should use arrow syntax.
 
 ```js
-assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\)\s*=>\s*{\s*}\s*/);
+assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*/);
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
index 67ed90281a1..3573a914c40 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
@@ -16,7 +16,7 @@ Use `getElementById()` to get the `id` of the currently playing song, then use t
 You should not modify the existing `highlightCurrentSong` function and its content.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*/)
 ```
 
 You should use `document.getElementById()` and pass in `` `song-${userData?.currentSong?.id}` ``.
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -692,7 +692,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
index fcf0fc37303..6d457fecbbb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
@@ -33,13 +33,13 @@ assert.match(code, /playlistSongElements\.forEach\(/)
 Your `forEach()` method should have a `songEl` parameter and use arrow syntax.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*/)
 ```
 
 Your `forEach` should have an empty pair of curly braces.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -637,7 +637,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
index cbb24dd0316..ac542ef97a9 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
@@ -16,19 +16,19 @@ Create an `if` statement with the condition `songToHighlight`. For the statement
 You should create an `if` statement with the condition `songToHighlight`.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*/)
 ```
 
 You should use the `setAttribute()` method on `songToHighlight` inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(/)
 ```
 
 You should pass in `"aria-current"` and `"true"` as the first and second argument of your `setAttribute` method.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\)\s*;?\s*\}?/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\s*\)\s*;?\s*\}?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
index 87ddc681248..3dffe98765b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
@@ -16,7 +16,7 @@ After that, play around with the control buttons to see how the `highlightCurren
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /highlightCurrentSong\(\)/)
+assert.match(code, /highlightCurrentSong\(\s*\)/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -688,7 +688,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
index e57d5cd5dc5..240164ff826 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
@@ -26,13 +26,13 @@ assert.isFunction(setPlayerDisplay)
 Your `setPlayerDisplay` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayerDisplay` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
index d3b1e768b32..fff256fce87 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
@@ -16,31 +16,31 @@ Access the `#player-song-title` and `#player-song-artist` elements with the `get
 You should not modify the existing `setPlayerDisplay` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use `document.getElementById()` to get the `#player-song-title` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should assign the `#player-song-title` element to the variable `playingSong`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should use `document.getElementById()` to get the `#player-song-artist` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 You should assign the `#player-song-artist` element to the variable `songArtist`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -716,7 +716,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
index 140afc03f49..b93cb833a55 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -710,7 +710,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
index 453d8e7907d..c7126db9070 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -725,7 +725,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
index 71922c89bcb..4e76e1b4e71 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
@@ -16,7 +16,7 @@ Now you should see the song title and the artist show up in the display.
 You should call the `setPlayerDisplay` function inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayerDisplay\(\);?/)
+assert.match(code, /setPlayerDisplay\(\s*\);?/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
index 5d70a1fcb76..9141f56978a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
@@ -28,13 +28,13 @@ assert.isFunction(setPlayButtonAccessibleText)
 Your `setPlayButtonAccessibleText` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayButtonAccessibleText` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -719,7 +719,7 @@ const renderSongs = (array) => {
 
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
index d6f8cb3a49e..6f9df228f00 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
@@ -16,19 +16,19 @@ Don't forget to use optional chaining.
 You should not modify the existing `setPlayButtonAccessibleText` and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should access `userData?.currentSong` or `userData?.songs[0]`.
 
 ```js
-assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 You should assign `userData?.currentSong || userData?.songs[0]` to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -715,7 +715,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
index a711e259e62..69e254d783c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
@@ -16,7 +16,7 @@ Don't forget you need template interpolation here, so you need to use backticks.
 You should not modify the existing `setPlayButtonAccessibleText` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `setAttribute()` method on `playButton`.
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
index 11d70829587..12dac676402 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
@@ -14,7 +14,7 @@ Now, call the `setPlayButtonAccessibleText` function inside the `playSong` funct
 You should call the `setPlayButtonAccessibleText` inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayButtonAccessibleText\(\);?/)
+assert.match(code, /setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -707,7 +707,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
index 83ce49f820f..b23deed687a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
@@ -28,13 +28,13 @@ assert.isFunction(shuffle)
 Your `shuffle` function should use an arrow syntax and should not take a parameter.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `shuffle` function  should be empty.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -729,7 +729,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
index 703c44ec0fb..f96f1585e98 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
@@ -24,7 +24,7 @@ Use the `sort()` method on the `userData?.songs` array. Pass a callback to the m
 You should not modify the existing `shuffle` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*{\s*[\s\S]*?\};?/);
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*{\s*[\s\S]*?\};?/);
 ```
 
 You should use the `sort()` method on `userData?.songs`.
@@ -42,7 +42,7 @@ assert.match(code, /userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*/)
 The callback of your `sort()` method should return `Math.random() - 0.5`.
 
 ```js
-assert.match(code, /userData\?.songs\.sort\s*\(\(\)\s*=>(\s*{\s*return\s+Math\.random\(\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\)\s*-\s*0\.5\s*)\);?/);
+assert.match(code, /userData\?.songs\.sort\s*\(\s*\(\s*\)\s*=>(\s*{\s*return\s+Math\.random\(\s*\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\s*\)\s*-\s*0\.5\s*)\s*\);?/);
 ```
 
 # --seed--
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -739,7 +739,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
index 1ecf87c24fa..68d60a20177 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
@@ -11,6 +11,8 @@ When the shuffle button is pressed, you want to set the `currentSong` to nothing
 
 Set `userData.currentSong` to `null` and `userData.songCurrentTime` to `0`.
 
+*Note*: You should not use optional chaining for this step because you are explicitly setting the `currentSong` and `songCurrentTime` properties to be `null` and `0` respectively.
+
 # --hints--
 
 You should set `userData.currentSong` to `null`.
@@ -620,7 +622,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -720,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
index 2f6a3c55925..63e9b0e8552 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
@@ -16,31 +16,31 @@ Call the `renderSongs` function and pass in `userData?.songs` as an argument. Al
 You should not modify the existing `shuffle` function and its content.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -741,7 +741,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
index 58531f69faf..d256509720c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
@@ -22,13 +22,13 @@ assert.match(code, /shuffleButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 You should pass in `shuffle` as the second value of your `click` event listener.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1,\s*shuffle\);?/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1,\s*shuffle\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
index ce5ab782169..e6892510e3f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -746,7 +746,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
index 4c2d0a27ad8..53bfab456a8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
@@ -7,7 +7,7 @@ dashedName: step-73
 
 # --description--
 
-Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData.songs` array.
+Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData?.songs` array.
 
 The `filter` method keeps only the elements of an array that satisfy the callback function passed to it:
 
@@ -20,12 +20,14 @@ console.log(numsGreaterThanThree) // Output: [10, 8, 4, 5]
 
 Use the `filter()` method on `userData?.songs`. Pass in `song` as the parameter of the arrow function callback and use implicit return to check if `song.id` is strictly not equal to `id`. Assign all of that to the `userData.songs`.
 
+*Note*: You should not use optional chaining when you assign the result of  `userData?.songs.filter` to `userData.songs` because the `allSongs` array will not be `undefined` or `null` at that point.
+
 # --hints--
 
 You should not modify the existing `deleteSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should use the `filter()` method on `userData?.songs`.
@@ -647,7 +649,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -757,7 +759,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
index 6f2c9a7cf07..eeb295ed93c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
@@ -18,25 +18,25 @@ After that, call the `highlightCurrentSong` function to highlight the current so
 You should not modify the existing `deleteSong` function and its content.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -634,7 +634,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -745,7 +745,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
index dd1de14856d..3166b05306a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
@@ -16,7 +16,7 @@ Use an `if` statement to check if the `userData?.currentSong?.id` is equal to th
 You should create an empty `if` statement with the condition `userData?.currentSong?.id === id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
index 6966c360e10..57a3fedc177 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
@@ -16,31 +16,31 @@ After that, call the `pauseSong()` function to stop the playback and the `setPla
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.currentSong` to `null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.songCurrentTime` to `0`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*.*\s*\}/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -755,7 +755,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
index 5a77e9a2136..73d63ceda77 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
@@ -9,14 +9,14 @@ dashedName: step-78
 
 Next, you need to check if the playlist is empty. If it is, you should reset the `userData` object to its original state.
 
-Use an `if` statement to check if the `userData.songs` has a length of `0`.
+Use an `if` statement to check if the `userData?.songs` has a length of `0`.
 
 # --hints--
 
-You should create an empty `if` statement with the condition `userData.songs.length === 0`
+You should create an empty `if` statement with the condition `userData?.songs.length === 0`.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -738,7 +738,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
index 0d9d33089ec..25f54d0200e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
@@ -33,19 +33,19 @@ Inside your `if` statement, declare a `resetButton` constant, then use `createEl
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*.*\s*\}/)
 ```
 
 You should use the `createElement` method to create a `button`.
 
 ```js
-assert.match(code, /document\.createElement\(('|")button\1\);?/)
+assert.match(code, /document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 You should assign your newly created `button` element to a `resetButton` constant.
 
 ```js
-assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?/)
+assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 # --seed--
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -708,7 +708,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
 
   }
 --fcc-editable-region--
@@ -769,7 +769,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
index 334524cd90e..1ed00b44892 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
@@ -18,7 +18,7 @@ Set the `id` attribute of `resetButton` to `reset` and its `aria-label` attribut
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should use `resetButton.id` to create an `id` attribute named `reset` for the `resetButton`.
@@ -628,7 +628,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
index e1d625e1841..620c4e6ee42 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
@@ -32,7 +32,7 @@ assert.match(code, /resetButton\.appendChild\(/)
 You should pass in `resetText` as the value of your first `appendChild()`.
 
 ```js
-assert.match(code, /resetButton\.appendChild\(resetText\);?/)
+assert.match(code, /resetButton\.appendChild\(\s*resetText\s*\);?/)
 ```
 
 You should use the `appendChild()` method on `playlistSongs`.
@@ -44,7 +44,7 @@ assert.match(code, /playlistSongs\.appendChild\(/)
 You should pass in `resetButton` as the value of your second `appendChild()`.
 
 ```js
-assert.match(code, /playlistSongs\.appendChild\(resetButton\);?/)
+assert.match(code, /playlistSongs\.appendChild\(\s*resetButton\s*\);?/)
 ```
 
 # --seed--
@@ -642,7 +642,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -773,7 +773,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
index 5c1ba140c57..52025f3aada 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
@@ -22,13 +22,13 @@ assert.match(code, /resetButton\.addEventListener\(/)
 Your `resetButton` event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 The callback function of your event listener should use arrow syntax and have an empty pair of curly braces.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -690,7 +690,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -760,7 +760,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
index 804534649a9..f75ade56291 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
@@ -7,22 +7,22 @@ dashedName: step-84
 
 # --description--
 
-You need to assign the `userData.songs` property to the initial `allSongs` array. This will reset the playlist to its original state.
+To reset the playlist to its original state, spread `allSongs` into an array and assign it to `userData.songs`.
 
-Spread `allSongs` into an array and assign it to `userData.songs`.
+*Note*: You should not use optional chaining for the `userData.songs` because the song will not be `null` or `undefined` at this point.
 
 # --hints--
 
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\s*\);?/)
 ```
 
 You should assign `[...allSongs]` to `userData.songs`.
 
 ```js
-assert.match(code, /userData\.songs\s*=\s*\[\.\.\.allSongs\]/)
+assert.match(code, /userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -684,7 +684,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
index 6caeec8ca4d..2e927de690e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
@@ -22,25 +22,25 @@ Remove the reset button from the playlist by calling the `remove()` method on th
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*.*\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*.*\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
 You should use the `remove()` method to remove the `resetButton` from the DOM.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*resetButton\.remove\(\);?\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*resetButton\.remove\(\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -702,7 +702,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -776,7 +776,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
index b6569f78291..651d5f539a7 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
@@ -24,13 +24,13 @@ assert.match(code, /audio\.addEventListener\(/)
 The event listener you used on on your `audio` variable should listen for an `ended` event.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback to your `ended` event listener.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 
@@ -629,7 +629,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -768,7 +768,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
index d2a11315df6..99e10b4d974 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
@@ -7,14 +7,14 @@ dashedName: step-77
 
 # --description--
 
-Within the button element in the `renderSongs` function, add an `onclick` attribute as the first attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
+Within the button element in the `renderSongs` function, add an `onclick` attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
 
 # --hints--
 
-You should add an `onclick` attribute as the first attribute of the delete button and pass in `deleteSong(${song.id})`.
+You should add an `onclick` attribute to the delete button and pass in `deleteSong(${song.id})`.
 
 ```js
-assert.match(code, /<button\s+onclick=('|")deleteSong\(\$\{song\.id\}\)\1\s*class=('|")playlist-song-delete\2\s*aria-label=('|")Delete\s*\$\{song\.title\}\3\s*>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")deleteSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
index 063dc463224..bfb640a0bfb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
@@ -7,30 +7,35 @@ dashedName: step-87
 
 # --description--
 
-Notice that the album art in the HTML and songs in the `allSongs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
+Notice that the album art in the HTML and songs in the `userData.songs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
 
 Next, you need to check if there is a next song to play. Retrieve the current song index by calling the `getCurrentSongIndex()` function, and save it in a `currentSongIndex` constant.
 
-After that, create a `nextSongExists` constant that checks if a next song exists.
+After that, create a `nextSongExists` constant that contains the boolean value `true` or `false` depending on if the next song exists.
 
 # --hints--
 
 You should not modify the existing `ended` event listener and its content.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should create a `currentSongIndex` constant and set it to the calling of the `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
-You should check if a next song exists with `userData?.songs[currentSongIndex + 1] !== undefined` and set it to a `nextSongExists` constant.
+You should check if a next song exists comparing `userData.songs.length` and `currentSongIndex` and set it to a `nextSongExists` constant. If the last index of the songs array (`userData.songs.length - 1`) is bigger than the currentSongIndex that means there is a next song.
 
 ```js
-assert.match(code, /const\s+nextSongExists\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\]\s*!==\s*undefined;?/)
+const secondPart = code.split(`audio.addEventListener("ended", () => {`)[1];
+const middlePart = secondPart.split("});")[0]
+const codeOutputFirstTest = eval(middlePart + "\nnextSongExists;");
+assert.strictEqual(codeOutputFirstTest, true);
+const codeOutputSecondTest = eval(`\nfunction getCurrentSongIndex() { return 100; };\n` + middlePart + "\nnextSongExists;")
+assert.strictEqual(codeOutputSecondTest, false);
 ```
 
 # --seed--
@@ -593,7 +598,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -657,7 +662,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -732,7 +737,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
index d0dd174ff4e..35b21cf2e65 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
@@ -14,13 +14,13 @@ Use an `if` statement to check if `nextSongExists` exists, then call the `playNe
 You should create an `if` statement with the condition `nextSongExists`.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*/)
 ```
 
 You should call the `playNextSong` function inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -583,7 +583,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -647,7 +647,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
index d7c0f2fe696..fb5c05520e2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
@@ -14,25 +14,25 @@ If there is no next song in the playlist, use the `else` block to reset the `cur
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `currentSong` property of `userData` to `null` in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `songCurrentTime` property of `userData` to `0` in the `else` block of your `if`statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
 ```
 
 # --seed--
@@ -595,7 +595,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -659,7 +659,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
index 8704a0d2ee7..eddbbe5014f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
@@ -17,28 +17,28 @@ You should call the `pauseSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /pauseSong\(\);?/)
+assert.match(splitter[1], /pauseSong\(\s*\);?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /setPlayerDisplay\(\);?/)
+assert.match(splitter[1], /setPlayerDisplay\(\s*\);?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -636,7 +636,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -775,7 +775,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
@@ -1418,7 +1418,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -1482,7 +1482,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -1557,7 +1557,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
index fad2eabb88d..b4f6ca0222f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
@@ -26,7 +26,7 @@ Inside the `userData` object create a `songs` property. For the value, spread `a
 Your `userData` object should have a `songs` key set to `[...allSongs]`.
 
 ```js
-assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\],?/);
+assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\]\s*,?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
index 18c9d421376..c12c20a4a35 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
@@ -14,7 +14,7 @@ To handle the current song's information and track its playback time, create a `
 You should not modify the existing `userData` object and its content.
 
 ```js
-assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\.\.\.allSongs\],?\s*/);
+assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\s*\.\.\.allSongs\s*\]\s*,?\s*/);
 ```
 
 Your `userData` object should have a `currentSong` key set to `null`.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
index 1521d22daa6..204efcb0342 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
@@ -9,26 +9,26 @@ dashedName: step-30
 
 Add an `else` block to handle the current song's position in the playlist.
 
-Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData.songCurrentTime`.
+Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData?.songCurrentTime`.
 
 # --hints--
 
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 You should add an `else` block to the existing `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
 ```
 
-You should set `audio.currentTime` to `userData.songCurrentTime` inside the `else` block of your `if` statement.
+You should set `audio.currentTime` to `userData?.songCurrentTime` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\.songCurrentTime;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\?\.songCurrentTime;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
index d944433b0da..150b2bc01a9 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
@@ -20,7 +20,7 @@ assert.match(code, /playlistSongElements\.forEach\(\s*(\(\s*songEl\s*\)|songEl)\
 You should use the `removeAttribute()` method on `songEl` and pass in `"aria-current"`.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(('|")aria-current\1\);?\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(\s*('|")aria-current\1\s*\);?\s*\}\s*\);?/)
 ```
 
 
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -691,7 +691,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
index 7348146bc4b..ad7114e708e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
@@ -13,10 +13,10 @@ Don't forget you need to interpolate with the dollar sign here.
 
 # --hints--
 
-You should add an `onclick` with the value `playSong(${song.id})` as the second attribute and value of the `button` element.
+You should add an `onclick` attribute with the value `playSong(${song.id})` to the `button` element.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-info\1\s*onclick\s*=\s*('|")playSong\(\$\{song\.id\}\)\2\s*>\s*<span\s+class\s*=\s*('|")playlist-song-title\3\s*>\$\{song\.title\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-artist\4\s*>\$\{song\.artist\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-duration\5\s*>\$\{song\.duration\}<\/span>\s*<\/button>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")playSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
index 71a502e5934..7f1e7a01055 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
@@ -28,19 +28,19 @@ Use the `createTextNode()` method to create a `Reset Playlist` text, then assign
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*\}/)
 ```
 
 You should use `document.createTextNode()` to create a `Reset Playlist` text.
 
 ```js
-assert.match(code, /document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 You should assign your created text node to a `resetText` constant.
 
 ```js
-assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -703,7 +703,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
 
 
@@ -766,7 +766,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
index c95a4635730..28916e24729 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
@@ -23,13 +23,13 @@ Pass in a callback function to the `map()` method. The callback function should
 The callback function of your `map()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?.*\)?\s*=>\s*\{\s*\}\)/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(.*\)|[^()]+)\s*=>\s*\{\s*\}\s*\)/)
 ```
 
 Your `map()` method should have a `song` parameter in it's callback function.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?song\)?/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
index 3fbe89fe7ff..8aec97c18c2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
@@ -14,20 +14,20 @@ const animals = ["dog", "cat", "horse"];
 animals.indexOf("cat") // 1
 ```
 
-Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData.currentSong`.
+Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData?.currentSong`.
 
 # --hints--
 
 You should return `userData?.songs.indexOf()` inside your `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\()|(\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(|\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
 ```
 
-You should pass in `userData.currentSong` into the `indexOf()` method.
+You should pass in `userData?.currentSong` into the `indexOf()` method.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\(userData\.currentSong\);?)|(\s*{\s*return\s+userData\?\.songs\.indexOf\(userData\.currentSong\);?)/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?|\s*{\s*return\s+userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?\s*})/)
 ```
 
 # --seed--
@@ -625,7 +625,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
index 5ab0c731ff4..65d0b692c62 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
@@ -23,7 +23,7 @@ Add the `sort()` method to `userData?.songs`.
 You should add the `sort()` method to `userData?.songs`.
 
 ```js
-assert.match(code, /userData\?\.songs\.sort\(*.\);?/);
+assert.match(code, /userData\?\.songs\.sort\(.*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
index 99b441c6e33..6fa72aa78bd 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
@@ -18,25 +18,25 @@ The variables will not change, so use `const` to declare them.
 You should use `document.getElementById()` to get the `#author-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 You should assign the `#author-container` element to the variable `authorContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#load-more-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 You should assign the `#load-more-btn` element to the variable `loadMoreBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
index 0e15f84dd7a..74f789f7f64 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
@@ -22,13 +22,13 @@ Make a `GET` request to this URL: `https://cdn.freecodecamp.org/curriculum/news-
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should not have a semi-colon after your `fetch` call.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
index b3b9b76e381..a8ee33e9288 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
@@ -27,37 +27,37 @@ Again, don't terminate the code with a semi-colon yet.
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain the `.then()` method to your `fetch()` syntax
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(/)
 ```
 
 You should add a `res` parameter to your `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
 ```
 
 Your `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
 ```
 
 You should log the `res` parameter to the console so you can see the `Response` object.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
index 176db4faec6..547d0c9bd6a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
@@ -16,19 +16,19 @@ Remove `console.log(res)` and implicitly return `res.json()` instead.
 You should remove the `console.log(res)`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*console\.log\(res\)\)/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should implicitly return `res.json()` in your `.then()`.
 
 ```js
-assert.match(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\)/)
+assert.match(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\);/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\);/)
 ```
 
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
index ad986121260..1d78f28f2e2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
@@ -17,7 +17,7 @@ Chain another `.then()` to the existing `.then()` method. This time, pass in `da
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Your first `.then()` should not have a semi-colon.
@@ -29,37 +29,37 @@ assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not not have semi-colon after it.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
index a6bd04dcb47..f94c50a366d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
@@ -18,67 +18,67 @@ Chain `.catch()` to the last `.then()`. Pass in a callback function with `err` a
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not have a semicolon.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\);/)
 ```
 
 You should chain the `.catch()` method to the second `.then()` you already have.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
 ```
 
 You should add an `err` parameter to your `.catch()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
 ```
 
 Your `.catch()` method should have an arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
 ```
 
 Your `.catch()` method should use `console.error()` to log `err` to the console with the text `` `There was an error: ${err}` ``. Don't forget to use backticks.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\)\s*;?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
index 31ead53b64b..73b77a857df 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
@@ -48,7 +48,7 @@ assert.match(code, /let\s+authorDataArr/)
 You should set your `authorDataArr` variable to an empty array (`[]`).
 
 ```js
-assert.match(code, /let\s+authorDataArr\s*=\s*\[\];?/)
+assert.match(code, /let\s+authorDataArr\s*=\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
index 7601728e970..d2d4d64621c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
@@ -14,7 +14,7 @@ Inside your `displayAuthors` function, chain `.forEach()` to `authors`.
 You should chain `.forEach()` to `authors`.
 
 ```js
-assert.match(code, /authors\.forEach\(\)/)
+assert.match(code, /authors\.forEach\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
index 91ab374e795..aa02d21d41c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
@@ -34,7 +34,7 @@ assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*/)
 Your callback function should be empty.
 
 ```js
-assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\)\s*=>\s*\{\s*\}\s*\);?/)
+assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
index aacdc42bf9a..e42497c75ad 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
@@ -16,7 +16,7 @@ First, remove your `console.log()` statement. Then, assign `data` to the `author
 You should remove the console log showing the `data`.
 
 ```js
-assert.notMatch(code, /console\.log\(data\);/)
+assert.notMatch(code, /console\.log\(\s*data\s*\);/)
 ```
 
 You should assign `data` to the `authorDataArr` variable
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
index a21631e0f9b..9adda9d1dd3 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
@@ -22,19 +22,19 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should have a console log with the text `Author Data Array:`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1/)
 ```
 
 You should use comma to separate your `Author Data Array:` text and `authorDataArr`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,/)
 ```
 
 `authorDataArr` should be the second argument of your console log statement.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
index cd6a4d416fc..ea861905529 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
@@ -22,7 +22,7 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should remove the console log statement showing `authorDataArr`
 
 ```js
-assert.notMatch(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.notMatch(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 You should call your `displayAuthors` function.
@@ -34,19 +34,19 @@ assert.match(code, /displayAuthors\(/)
 You should call your `displayAuthors` function and pass in an argument of `authorDataArr.slice()`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first parameter of your `slice()` method should be `startingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second parameter of your `slice()` method should be `endingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\);?/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
index b5528d4221a..f4f4699c89d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
@@ -34,13 +34,13 @@ assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*/)
 Your `fetchMoreAuthors` function should use arrow syntax.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `fetchMoreAuthors` function should be empty.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*\{\s*\}/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
index 90e0b31572b..ac2266cb1a4 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
@@ -24,21 +24,21 @@ You should call your `displayAuthors` function and pass in an argument of `autho
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first argument of your `slice()` method should be `startingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second argument of your `slice()` method should be `endingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\)/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
index 2ca307dc026..f4069b7fd61 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
@@ -24,13 +24,13 @@ assert.match(code, /loadMoreBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 Your event listener should take `fetchMoreAuthors` as the function to run.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1,\s*fetchMoreAuthors\);?/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1,\s*fetchMoreAuthors\s*\);?/)
 ```
 
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
index 6c610c97896..3d0c022332b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
@@ -24,13 +24,13 @@ assert.match(code, /if\s*\(/)
 Your `if` statement should take in `authorDataArr.length <= endingIndex` as its condition.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*/)
 ```
 
 Your `if` statement should be empty.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
index fdf908f74ba..9f3ef25d765 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
@@ -28,22 +28,21 @@ assert.match(code, /<p\s*class=("|')bio\1>/);
 You should check if the length of the `bio` text is greater than `50`.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50/)
+assert.match(code, /<p\s*class=("|')bio\1>\s*\$\{\s*bio\.length\s*>\s*50/)
 ```
 
 If the `bio` text is greater than `50` characters, you should extract the first 50 characters with `slice()` and replace the rest with `...`. Don't forget that indexes are zero-based.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:/);
 ```
 
 If the `bio` text is less than 50 characters, use the `bio` text directly.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:\s*bio\s*\}<\/p>/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:\s*bio\s*\}\s*<\/p>/);
 ```
 
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
index 98a8a188144..e699ab36a6d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
@@ -16,7 +16,7 @@ Inside the `.catch()`, remove the `console.error()` and set the `innerHTML` of t
 You should remove your `console.error` and its text.
 
 ```js
-assert.notMatch(code, /console\.error\(`There\s+was\s+an\s+error:\s+\$\{err\}`\);/)
+assert.notMatch(code, /console\.error\(\s*`There\s+was\s+an\s+error:\s+\$\{err\}`\s*\);/)
 ```
 
 You should access the `innerHTML` of `authorContainer` and set it to a `p` element. Don't forget to surround the `p` element with a template literal.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
index 2be71cced3a..6084f91aabd 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
@@ -96,19 +96,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
index 9759e8a60b7..c547f5a2cbb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
@@ -120,19 +120,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
index b5e0ecdbd2d..bcc3abea985 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
@@ -111,19 +111,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
index cfcb817801a..41a86aa8b9c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
index e776ea2f074..67344c173f5 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
@@ -7,8 +7,9 @@ dashedName: step-5
 
 # --description--
 
-Now create a `fieldset` with an `id` set to `lunch`, and a corresponding `legend` and `div` element.
+Next, create a `fieldset` element with the `id` set to `lunch`.
 
+Within that element, create a `legend` element with the text `Lunch`, and an empty `div` with the `class` set to `input-container`.
 # --hints--
 
 You should create a second `fieldset` element in your `form`.
@@ -138,19 +139,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
index 685f77b7820..ac23386820b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
index 2dc4de9eefc..36a1dd58120 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
@@ -188,19 +188,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
index fbd140f4e82..6855978cd17 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
index 6814d014c85..7161789fd53 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
@@ -190,19 +190,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
index 0f21af8c53e..c1c0eb29b07 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
@@ -196,19 +196,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
index 8ebdd3fdad1..ed9eae860ac 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
index 4793ed7de03..d67f1b060ed 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
index 0384173b6ca..f59a954c298 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
index 42e949c70e5..c52d5b77e3a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
@@ -29,13 +29,13 @@ You should create a variable called `calorieCounter`.
 assert.isDefined(calorieCounter);
 ```
 
-You should use `document.getElementById()` to get the `#calorie-counter` element.
+You should have `document.getElementById('calorie-counter')` in your code.
 
 ```js
 assert.match(code, /document\.getElementById\(\s*('|")calorie-counter\1\s*\)/g);
 ```
 
-You should store the `#calorie-counter` element in a variable called `calorieCounter`.
+You should assign `document.getElementById('calorie-counter')` to your `calorieCounter` variable.
 
 ```js
 assert.equal(calorieCounter, document.getElementById('calorie-counter'));
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
index f325dc79e0f..f17e30ce4c6 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
index 27f5bce54ff..a993f3c37c9 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
index dad3e77d4d5..b4ad5d7c770 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
@@ -7,6 +7,13 @@ dashedName: step-17
 
 # --description--
 
+In programming, it is standard practice to prefix a variable with `is` or `has` to indicate that the variable is a boolean.
+
+```js
+let isRunning = true;
+let hasCompleted = false;
+```
+
 Declare an `isError` variable and set it to `false`, but use `let` so you can reassign it later.
 
 # --hints--
@@ -148,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
index 2ea52d74fd5..edfe909e7fb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
@@ -28,7 +28,7 @@ assert.isFunction(cleanInputString);
 Your `cleanInputString` function should take a `str` parameter.
 
 ```js
-assert.match(cleanInputString?.toString(), /\(str\)/);
+assert.match(cleanInputString?.toString(), /\(\s*str\s*\)/);
 ```
 
 `cleanInputString` should be an empty function.
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
index 821e57c8c52..33177195353 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
index 2f8c5e56fc7..702895f1115 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
index 4cf29924186..d0415579d0d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
index 05259f504df..a9314747778 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
@@ -7,24 +7,26 @@ dashedName: step-22
 
 # --description--
 
-Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
-
 You will need to check if the array `["+", "-", " "]` does not include the current character. You can use a combination of the <dfn>includes()</dfn> method and the <dfn>!</dfn> operator to do this.
 
 The `.includes()` method returns `true` if the array contains the character, and `false` if not. The logical NOT operator (`!`) will return the opposite of the value of the `.includes()` method.
 
-Here is an example:
+Here is an example checking if the current character is not in the vowels array. If it is not, that current character is pushed into the `consonantArray`:
 
 ```js
-const numbersArray = [1, 2, 3, 4, 5]
-const number = 6
+const inputString = "Hello World";
+const charArray = inputString.split('');
+const consonantArray = [];
 
-if (!numbersArray.includes(number)) {
-  console.log("The number is not in the array.")
+for (let i = 0; i < charArray.length; i++) {
+  if (!['a', 'e', 'i', 'o', 'u'].includes(charArray[i])) {
+    consonantArray.push(charArray[i]);
+  }
 }
-
 ```
 
+Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
+
 # --hints--
 
 Your `for` loop should have an `if` statement.
@@ -37,19 +39,19 @@ Your `for` loop should use `!["+", "-", " "].includes()`.
 
 ```js
 // the loop protection injects code so we have to look at the raw code directly
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(/);
 ```
 
-Your `for` loop should see if `strArray[i]` is found in `["+", "-", " "]`.
+Your `for` loop should see if `!["+", "-", " "].includes(strArray[i])`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?/);
 ```
 
 Your `for` loop should `push` `strArray[i]` to `cleanStrArray`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\[i\]\s*\)\s*;?\s*(\s*\})?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*;?\s*(\s*\})?/);
 ```
 
 # --seed--
@@ -171,19 +173,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
index 65b10f2cc94..48c0d866882 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
@@ -168,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
index e1805d793e0..a398f1aefec 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
index bf187751181..a6cec41aac3 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
index d81f7c62d91..667652b7630 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
index b54a6af9dc5..901c7be81b6 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
index 59cb096acbd..3be0935db3c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
index d9d2f1480ac..860e2fa85a5 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
index ae18c62c9a2..03e0ee3c772 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
index 4b92e893c1f..e266ab80e3d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
index f72d1274140..e5c3ad03b42 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
index 2f31d03540b..e256082cb98 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
index f724929bfe2..e813455d322 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
index 3adb10d0361..7a170e84b25 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
@@ -6,8 +6,13 @@ dashedName: step-35
 ---
 
 # --description--
+Strings have a <dfn>.match()</dfn> method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
 
-Strings have a `.match()` method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
+```js
+const str = 'example string';
+const regex = /example/;
+const result = str.match(regex); // Returns ['example']
+```
 
 Return the result of calling the `.match()` method on `str` and passing your `regex` variable as the argument. You'll use this match result later on.
 
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
index f5ab300dac1..3a71b6071dc 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
index 3d503fb506f..526e40045dd 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
index cbb6544a427..2c10de23944 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
index ddcf9849888..c7f0b81336a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
@@ -26,13 +26,13 @@ Replace your concatenated string in the `querySelector` with a template literal
 You should use a template literal in your `querySelector` method.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`.*`\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`.*`\s*\)/);
 ```
 
 Your template literal should have the value `{targetId} .input-container`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`\$\{targetId\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`\$\{targetId\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
index b0f229cb0e6..eca6e7e1dd8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
@@ -20,13 +20,13 @@ assert.notMatch(addEntry.toString(), /targetId\s*=/);
 You should replace the `targetId` reference in your template literal with `entryDropdown.value`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 You should add `#` at the beginning of your template literal.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
index bb1900a283d..a4e125339b6 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
index cdaa37c0b12..2fe82090d69 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
@@ -24,13 +24,13 @@ assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.query
 You should access the `length` property of your `querySelectorAll()`.
 
 ```js
-assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 Your `entryNumber` variable should be the `length` of the `querySelectorAll`.
 
 ```js
-assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 # --seed--
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
index 9c6b149c15b..eb808734eca 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
index 3d976fe174a..6c8bc199010 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
@@ -20,7 +20,7 @@ assert.match(code, /HTMLString\s*=\s*`\n\s*<label>.*<\/label>/);
 Your `label` element should have the text `Entry ${entryNumber} Name`.
 
 ```js
-assert.match(code, /HTMLString\s*=\s*`\n\s*<label>Entry\s\$\{entryNumber\}\sName<\/label>/);
+assert.match(code, /HTMLString\s*=\s*`\n\s*<label>\s*Entry\s\$\{entryNumber\}\sName\s*<\/label>/);
 ```
 
 # --seed--
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
index ed673d2a1fd..53b0a2c6e5c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
index 95740293f90..8c8f34ff896 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
index b1756157eb1..3f2e5e02d75 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
index d18bfe235dc..0080fbe0340 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
@@ -185,19 +185,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
index 778a04c01e8..8dc11843364 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
@@ -172,19 +172,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
index 09c149fb1d0..3ae3f03aa63 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
index 7641ff58296..9f6a8719a8a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
index 6776a1f42ba..3457dd3a44a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
@@ -146,19 +146,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
index c0f98829b79..b9d23ab43d8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
index 62e683ee254..7d1fa21d69d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
@@ -9,7 +9,25 @@ dashedName: step-50
 
 In the Role Playing Game project, you learned how to set a button's behavior by editing its `onclick` property. You can also edit an element's behavior by adding an event listener.
 
-Call the `.addEventListener()` method of the `addEntryButton`. It takes two arguments. The first is the event to listen to – you should pass the string `click`. The second is the callback function, or the function that runs when the event is triggered. Pass the `addEntry` function as the second argument. Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
+The following example uses the `addEventListener` method to add a click event to a button. When the button is clicked, the `printName` function is called.
+
+```html
+<button class="btn">Print name</button>
+```
+
+```js
+const button = document.querySelector('.btn');
+function printName() {
+  console.log("Jessica");
+}
+button.addEventListener('click', printName);
+```
+
+The `addEventListener` method takes two arguments. The first is the event to listen to. (Ex. `'click'`) The second is the callback function, or the function that runs when the event is triggered.
+
+Call the `.addEventListener()` method on the `addEntryButton`. Pass in the string `click` for the first argument and the `addEntry` function for the second argument.
+
+Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
 
 # --hints--
 
@@ -150,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
index 194ce042781..5a2a28a4793 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
index 1b52313ff58..452d405eea2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
@@ -7,34 +7,26 @@ dashedName: step-56
 
 # --description--
 
-The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is an array-like which contains the elements that match the query selector.
+The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is a list of elements like an array. It contains the elements that match the query selector. You will need to loop through these elements in the list.
 
-You'll need to loop through these elements, so start by creating a `for` loop. Your iterator `i` should start at `0`, continue while it is less than the length of the list, and increment by `1` each iteration.
+In previous steps, you learned how to loop through an array using a `for` loop. You can also use a <dfn>for...of</dfn> loop to loop through an array and a `NodeList`.
+
+A `for...of` loop is used to iterate over elements in an iterable object like an array. The variable declared in the loop represents the current element being iterated over.
+
+```js
+for (const element of elementArray) {
+  console.log(element);
+}
+```
+
+Create a `for...of` loop that loops through the list. For the loop's variable name, use `const` to declare a variable called `item`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should have a `for` loop.
+You should have a `for...of` loop that loops through the `list` parameter. Use `item` for the loop's variable name.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(/g);
-```
-
-Your `for` loop should initialize a variable called `i` to `0`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;/g);
-```
-
-Your `for` loop should have a condition that checks if `i` is less than the length of `list`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;/g);
-```
-
-Your `for` loop should increment `i` by `1` each time it runs. Use the increment operator for this.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)/g);
+assert.match(code, /for\s*\(\s*const\s+item\s+of\s+list\s*\)\s*\{/);
 ```
 
 # --seed--
@@ -156,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
index 3be27a5ed36..41b00237212 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
@@ -9,40 +9,20 @@ dashedName: step-57
 
 The `NodeList` values you will pass to `list` will consist of `input` elements. So you will want to look at the `value` attribute of each element.
 
-Assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
+Assign `item.value` to a `const` variable called `currVal`.
 
 # --hints--
 
-You should have a `currVal` variable.
+You should use `const` to declare a new variable called `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=/);
+assert.match(code, /const\s+currVal\s*=/);
 ```
 
-You should access the element in `list` at index `i` using bracket notation.
+You should assign `item.value` to `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]/);
-```
-
-You should access the `value` attribute of the element in `list` at index `i`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]\.value/);
-```
-
-You should assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*list\[i\]\.value/);
-```
-
-Your `currVal` assignment should be in your `for` loop.
-
-```js
-// another hack, because the loop protection injects stuff
-const getCaloriesString = code.split("function getCaloriesFromInputs")[1];
-assert.match(getCaloriesString, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*(const|let)\s+currVal\s*=\s*list\[i\]\.value/g);
+assert.match(code, /const\s+currVal\s*=\s*item\.value/);
 ```
 
 # --seed--
@@ -164,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,15 +224,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
+  --fcc-editable-region--
+  for (const item of list) {
 
   }
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
index b8af45437b3..f6918540eb8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
@@ -9,26 +9,26 @@ dashedName: step-58
 
 Remember that you wrote a function earlier to clean the user's input? You'll need to use that function here.
 
-Update your `currVal` declaration to be the result of calling `cleanInputString` with `list[i].value`.
+Update your `currVal` declaration to be the result of calling `cleanInputString` with `item.value`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should call your `cleanInputString` function.
+You should call the `cleanInputString` function inside the `getCaloriesFromInputs` function.
 
 ```js
 assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(/);
 ```
 
-You should pass `list[i].value` as the argument for `cleanInputString`.
+You should pass `item.value` as the argument for `cleanInputString` function.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 You should assign the result of your `cleanInputString` call to your `currVal` variable.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(code, /const\s+currVal\s*=\s*cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -238,15 +231,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = list[i].value;
+  for (const item of list) {
+    --fcc-editable-region--
+    const currVal = item.value;
+    --fcc-editable-region--
   }
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
index 49adff98edf..db58636fd45 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -239,8 +232,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
 
   }
 }
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
index d5da3dc1dec..cc5bcadeca2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,8 +244,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
index 232f2bc1e95..22cd4072703 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
@@ -23,13 +23,13 @@ You should use a template literal to pass the `Invalid Input:` message to the `a
 
 ```js
 // because it transforms template literals...
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: /);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: /);
 ```
 
-You should use template literal syntax to display the first value in the `invalidInputMatch` array after the `Invalid Input:` text.
+You should display the first element of the `invalidInputMatch` array after the `Invalid Input:` text by using a template literal.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\)/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\)/);
 ```
 
 # --seed--
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
index 20bd30ceee4..28269086a77 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
@@ -7,6 +7,8 @@ dashedName: step-62
 
 # --description--
 
+In programming, `null` is meant to represent the absence of a value. In this case, if the user enters an invalid input, you want to alert them and then return `null` to indicate that the function has failed.
+
 Still within your `if` block, set `isError` to `true` and return `null`.
 
 # --hints--
@@ -14,13 +16,13 @@ Still within your `if` block, set `isError` to `true` and return `null`.
 After your `alert`, you should set `isError` to `true`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true/);
 ```
 
 After you modify `isError`, you should `return` the value `null`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
 ```
 
 # --seed--
@@ -142,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -233,8 +228,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
index 396dbd5ec29..bfce24570fe 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
@@ -17,6 +17,7 @@ Here is an example:
 
 ```js
 Number('10'); // returns the number 10
+Number('abc'); // returns NaN
 ```
 
 # --hints--
@@ -164,19 +165,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +249,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
index 41cbcb4213f..51282705de2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
@@ -17,12 +17,6 @@ You should `return` the `calories` value.
 assert.match(getCaloriesFromInputs.toString(), /return\s+calories/);
 ```
 
-Your new `return` statement should come after your `for` loop.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /calories\s*\+=\sNumber\(currVal\);\n\s*}\n\s*return\s+calories/)
-```
-
 # --seed--
 
 ## --seed-contents--
@@ -142,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -229,12 +216,11 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -244,9 +230,10 @@ function getCaloriesFromInputs(list) {
     }
     calories += Number(currVal);
   }
+  --fcc-editable-region--
 
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
index aba4e638a2e..dcab74cc147 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
@@ -26,7 +26,7 @@ assert.isFunction(calculateCalories);
 Your `calculateCalories` function should take an `e` argument.
 
 ```js
-assert.match(calculateCalories?.toString(), /\(e\)/);
+assert.match(calculateCalories?.toString(), /\(\s*e\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
index 500b4b3a1cb..e0fa5e875ef 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
@@ -16,7 +16,7 @@ Add a line to your `calculateCalories` function that calls the `preventDefault()
 Your `calculateCalories` function should call `e.preventDefault()`.
 
 ```js
-assert.match(calculateCalories.toString(), /e\.preventDefault\(\)/);
+assert.match(calculateCalories.toString(), /e\.preventDefault\(\s*\)/);
 ```
 
 Your `calculateCalories` function should reset the global error flag to `false`.
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -240,8 +233,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
index b0b9760b6f3..677fb1718c2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
@@ -22,13 +22,13 @@ assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#breakfast input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `odocument.querySelectorAll()` call to `breakfastNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -249,8 +242,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
index 7eee60cbd74..2bcd743ae06 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#lunch input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `lunchNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -248,8 +241,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
index 08422bfe3f6..58006ce6457 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#dinner input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `dinnerNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `snacksNumberInputs` variable.
@@ -38,13 +38,13 @@ assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#snacks input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `snacksNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `exerciseNumberInputs` variable.
@@ -56,13 +56,13 @@ assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#exercise input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `exerciseNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -285,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
index 415266c66f8..40a36f22e0b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +248,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
index 51701b1604c..1d11266a305 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -254,8 +247,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
index 948460e0e43..169aea9c2ef 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -291,8 +284,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
index 63376639739..be8e8d360ec 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -262,8 +255,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
index a04615e6d58..3a1fe506059 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -260,8 +253,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
index 94b7cae8dd9..8cf31fcd8e1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -270,8 +263,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
index a3d38894d21..2450dce3b2f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -265,8 +258,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
index 04b98a31266..f259023c267 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
@@ -162,19 +162,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +273,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
index 9301df8b91d..e8125a7f3a8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
@@ -7,7 +7,7 @@ dashedName: step-78
 
 # --description--
 
-You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element.
+You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element on a new line at the end of the function.
 
 # --hints--
 
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -263,8 +256,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
index 23e32c995b4..d2b13da9ad9 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
@@ -7,9 +7,16 @@ dashedName: step-79
 
 # --description--
 
-Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable, but lowercased.
+When you need to lower case a string, you can use the <dfn>toLowerCase()</dfn> method. This method returns the calling string value converted to lower case.
 
-Strings have a `.toLowerCase()` method that can help you with this. Do not give your `span` any text yet.
+```js
+const firstName = 'JESSICA';
+console.log(firstName.toLowerCase()); // Output: jessica
+```
+
+Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable. Your `surplusOrDeficit` variable should be converted to lower case using the `toLowerCase()` method.
+
+Do not give your `span` any text yet.
 
 # --hints--
 
@@ -160,19 +167,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -279,8 +279,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
index 5c37dd158d7..ec184a37aa1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -258,8 +251,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
index 09f4369b0a0..dc8037da1f5 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
@@ -9,7 +9,14 @@ dashedName: step-81
 
 When the user has a calorie deficit, the `remainingCalories` value will be negative. You don't want to display a negative number in the result string.
 
-`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number. In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
+`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number.
+
+```js
+const num = -5;
+Math.abs(num); // 5
+```
+
+In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
 
 # --hints--
 
@@ -24,7 +31,7 @@ Your `span` should have the text `${Math.abs(remainingCalories)} Calorie ${surpl
 
 ```js
 const htmlString = code.split(/output\s*\.\s*innerHTML\s*=\s*/)[1].split(/`/)[1];
-assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(remainingCalories\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
+assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(\s*remainingCalories\s*\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
 ```
 
 # --seed--
@@ -146,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -267,8 +267,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
index 21d9cd6f825..1887f5ea38b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
index 64a30aa0fdd..0f3a904f6f1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -283,8 +276,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
index 8741c907c79..eb163323afc 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
@@ -158,19 +158,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -282,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
index 91aee8a001d..40dbe621aa7 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
@@ -9,6 +9,11 @@ dashedName: step-85
 
 Finally, you need to make the `#output` element visible so the user can see your text. Your `output` variable is an Element, which has a `classList` property. This property has a `.remove()` method, which accepts a string representing the class to remove from the element.
 
+```js
+const paragraphElement = document.getElementById('paragraph');
+paragraphElement.classList.remove('hide');
+```
+
 Use the `.remove()` method of the `output` variable's `classList` property to remove the `hide` class. Don't forget to place the word `hide` inside quotes.
 
 # --hints--
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -277,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
index 5a454728a9f..5717e110a31 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
index 15ae81ae293..34941fa7fad 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
index 1c9332989ca..601f3c1276d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
index 8682b568706..a9f155a49f8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
@@ -9,6 +9,22 @@ dashedName: step-89
 
 Remember that `document.querySelectorAll` returns a `NodeList`, which is array-like but is not an array. However, the `Array` object has a `.from()` method that accepts an array-like and returns an array. This is helpful when you want access to more robust array methods, which you will learn about in a future project.
 
+The following example takes a `NodeList` of `li` elements and converts it to an array of `li` elements:
+
+```html
+<ul>
+  <li>List 1</li>
+  <li>List 2</li>
+  <li>List 3</li>
+</ul>
+```
+
+```js
+const listItemsArray = Array.from(document.querySelectorAll('li'));
+
+console.log(listItemsArray); //Output: (3) [li, li, li]
+```
+
 Wrap your `inputContainers` query selector in `Array.from()`. Do this on the same line as your declaration.
 
 # --hints--
@@ -144,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -269,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
index a0d6328eaae..dc953786e9c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
@@ -7,33 +7,25 @@ dashedName: step-90
 
 # --description--
 
-It is time for another loop. Use a `for` loop to iterate through the `inputContainers` array.
+It is time for another loop. Create a `for...of` loop with a variable called `container` to iterate through the `inputContainers` array.
 
-Inside the loop, set the `innerHTML` property of the element at the current index to an empty string. This will clear all of the contents of that input container.
+Inside the loop, set the `innerHTML` property of the `container` to an empty string. This will clear all of the contents of that input container.
 
 # --hints--
 
-Your `clearForm` function should have a `for` loop.
+Your `for...of` loop should iterate through the `inputContainers` array. The loop's variable name should be `container`.
 
 ```js
-// loop protect injects stuff, so let's look at the raw code again
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(/);
+assert.match(clearForm, /for\s*\(\s*const\s+container\s+of\s+inputContainers\s*\)/);
 ```
 
-Your `for` loop should iterate through the `inputContainers` array. Remember to use `i` as your iterator.
+Your `for...of` loop should set the `innerHTML` property of `container` to an empty string.
 
 ```js
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*inputContainers\.length\s*;\s*i\s*\+\+\s*\)/);
-```
-
-Your `for` loop should set the `innerHTML` property of `inputContainers[i]` to an empty string.
-
-```js
-const clearForm = code.split("function clearForm()")[1];
-const forLoop = clearForm.split("for")[1];
-assert.match(forLoop, /inputContainers\[\s*i\s*\]\s*\.innerHTML\s*=\s*(`|'|")\1\s*/);
+const forOfLoop = clearForm.split("for")[1];
+assert.match(forOfLoop, /container\s*\.\s*innerHTML\s*=\s*(`|'|")\1\s*/);
 ```
 
 # --seed--
@@ -155,19 +147,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +265,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
index dc38ec2cd77..34f683b0050 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
index eb0a980f129..fe00fc56c4e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
index 7e9d20569eb..6a4eb49c50d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
index 5ab68097443..01df6ae7cd2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -292,8 +285,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
@@ -425,19 +418,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -550,8 +536,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -567,8 +553,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
index a1c4fb0d7e7..55d91a239b8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
@@ -16,13 +16,13 @@ In your `createLabel` function, declare a `label` variable and assign it a new `
 You should declare a `label` variable in your `createLabel` function.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*(?:const|let|var)\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*(?:const|let|var)\s+label/);
 ```
 
 Your `label` variable should be declared with `const`.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*const\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*const\s+label/);
 ```
 
 You should use the `.createElement()` method of the `document` object.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
index 93f8895d535..a1f7e4ff964 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
@@ -22,7 +22,7 @@ assert.match(code, /letters\.forEach\(/);
 You should pass your `createLabel` function reference to the `.forEach()` method.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*createLabel\s*\)/);
+assert.match(code, /letters\.forEach\(\s*(?:\(\s*([\S]*)\s*\)|\s*([\S]*))\s*=>\s*createLabel\(\s*\1\2\s*\)\s*\)|letters\.forEach\(\s*createLabel\s*\)/);
 ```
 
 You should not pass a `createLabel` function call.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
index 1e7b811d30b..4567acb5c4f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-In your callback, call `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
+In your callback, you will need to make two function calls. Start by calling `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
 
 Then call the `.forEach()` method on your `letters` array. Pass an empty callback function which takes a `letter` parameter.
 
@@ -46,7 +46,13 @@ assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{/)
 Your callback function should be empty.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{\s*\}/)
+assert.match(code, /letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}/)
+```
+
+Your `letters.forEach()` callback function should be nested inside the `range(1, 99).forEach(number => {}` callback function.
+
+```js
+assert.match(code, /range\s*\(\s*1\s*,\s*99\s*\)\s*.forEach\s*\(\s*(\(\s*number\s*\)|number)\s*=>\s*\{\s*[^}]*letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}\s*\)\s*\}\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
index cf515d8e50c..e376c0eeb7d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
@@ -9,8 +9,6 @@ dashedName: step-17
 
 Now in your nested `.forEach()` call, declare an `input` variable. Use the `.createElement()` method of the `document` object to create an `input` element. Set the `type` attribute to `text` and the `id` attribute to `letter + number`.
 
-For accessibility, set the `aria-label` attribute to the same value as the `id` attribute.
-
 # --hints--
 
 You should declare an `input` variable.
@@ -67,18 +65,6 @@ You should set the `id` attribute of your `input` element to `letter + number`.
 assert.match(code, /input\.id\s*=\s*letter\s\+\snumber/)
 ```
 
-You should access the `ariaLabel` property of your `input` element.
-
-```js
-assert.match(code, /input\.ariaLabel/);
-```
-
-You should set the `aria-label` attribute of your `input` element to `letter + number`.
-
-```js
-assert.match(code, /input\.ariaLabel\s*=\s*letter\s\+\snumber/)
-```
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
index f036d9ff9aa..42633bfd960 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
@@ -1,8 +1,8 @@
 ---
 id: 643498328cb52026123e2b91
-title: Step 18
+title: Step 19
 challengeType: 0
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
index ced31b234ab..8d1ddcd5fb5 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
@@ -1,8 +1,8 @@
 ---
 id: 643498755d54c6279ba09078
-title: Step 19
+title: Step 20
 challengeType: 0
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
index 96428869cec..9d06932a530 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
@@ -1,8 +1,8 @@
 ---
 id: 6437124c4c03dd4c8fb35d56
-title: Step 20
+title: Step 21
 challengeType: 0
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
index 1faf5d65bcf..58e532930ff 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
@@ -1,8 +1,8 @@
 ---
 id: 6437133052eaf04d7300e622
-title: Step 21
+title: Step 22
 challengeType: 0
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
index d72ed169821..b23e311ab0e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
@@ -1,8 +1,8 @@
 ---
 id: 643715013330824ecaa70442
-title: Step 22
+title: Step 23
 challengeType: 0
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
index d9107f59a66..deb4a393803 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d1e5af8c0148fbef96d
-title: Step 23
+title: Step 24
 challengeType: 0
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
index 40d5b6d8671..8c9bacddb49 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d80bc174a158c973080
-title: Step 24
+title: Step 25
 challengeType: 0
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
@@ -50,19 +50,19 @@ assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*n
 The first element of the array passed to `average()` should be the element at the `middle` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]/);
 ```
 
 The first element of the array passed to `average()` should be the element at the `middle + 1` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\)/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)/);
 ```
 
 If the ternary is false, you should return the value of `sorted` at the `middle` index. Use `Math.ceil()` to round the `middle` value up.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\[\s*Math\.ceil\(\s*middle\s*\)\s*\];?/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\s*\[\s*Math\.ceil\(\s*middle\s*\)\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
index f3938503880..efe3f42753d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
@@ -1,8 +1,8 @@
 ---
 id: 64496df724dd3716a71fe971
-title: Step 25
+title: Step 26
 challengeType: 0
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
index 45011711b45..7b8b7d9ffe6 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
@@ -1,8 +1,8 @@
 ---
 id: 64496e9c6d7a2e189948e441
-title: Step 26
+title: Step 27
 challengeType: 0
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
index 441a5da6cbb..52e6a20efa0 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
@@ -1,8 +1,8 @@
 ---
 id: 6449749d20436c1f1dfadcf2
-title: Step 27
+title: Step 28
 challengeType: 0
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
index ba9260e0b4e..63c290f2fb7 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
@@ -1,8 +1,8 @@
 ---
 id: 6449755666005520330cec5b
-title: Step 28
+title: Step 29
 challengeType: 0
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
index aa40b2b445a..1dc1617bd6e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
@@ -1,8 +1,8 @@
 ---
 id: 64497da4062602213ecf32e7
-title: Step 29
+title: Step 30
 challengeType: 0
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
index d8123352375..e018fb06bbf 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
@@ -1,8 +1,8 @@
 ---
 id: 64497de936a2f322327e5c58
-title: Step 30
+title: Step 31
 challengeType: 0
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
index 0fa3e9b2a48..9a418bcf2fb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e0e5e5a2c2329785af4
-title: Step 31
+title: Step 32
 challengeType: 0
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
@@ -16,7 +16,7 @@ Use the `&&` operator to add a second condition to your `if` statement that also
 You should use the `&&` operator to add a second condition to your `if` statement that also checks if the first character of `value` is `=`. You may use `[0]`, `.startsWith()`, or `.charAt(0)`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
index 89ddc313bd5..cea5d468a27 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e764135bd24b7960dd3
-title: Step 32
+title: Step 33
 challengeType: 0
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
index 81ab6e5bbc5..117a075e0f3 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
@@ -1,8 +1,8 @@
 ---
 id: 6449842c6f6c84261075e4c9
-title: Step 33
+title: Step 34
 challengeType: 0
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
index bdc57a917fd..f331b2e13dc 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
@@ -1,8 +1,8 @@
 ---
 id: 64498473a17adc26ef0ecc2d
-title: Step 34
+title: Step 35
 challengeType: 0
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
index a8f40427a15..869aa786b1b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
@@ -1,8 +1,8 @@
 ---
 id: 6449849b78f43527be1e8a98
-title: Step 35
+title: Step 36
 challengeType: 0
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
index 58e0f7066ac..379d979b83e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
@@ -1,8 +1,8 @@
 ---
 id: 64498542cab69128ab24e4de
-title: Step 36
+title: Step 37
 challengeType: 0
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
index 9d7678ef457..db2048f5154 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
@@ -1,8 +1,8 @@
 ---
 id: 6449860d84c9e22cbd7b497c
-title: Step 37
+title: Step 38
 challengeType: 0
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
index e136c011b6d..1d217df30cf 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
@@ -1,8 +1,8 @@
 ---
 id: 6449863f592af72d9be0959e
-title: Step 38
+title: Step 39
 challengeType: 0
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
index 0bbc0559291..97250208fe7 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
@@ -1,8 +1,8 @@
 ---
 id: 6449874d5191562eb3313b3f
-title: Step 39
+title: Step 40
 challengeType: 0
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
index 80d079ebcc0..f48039d757e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
@@ -1,8 +1,8 @@
 ---
 id: 6449876e7aae0d2f8257a497
-title: Step 40
+title: Step 41
 challengeType: 0
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
index f091b421e16..6e3f9b611c6 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
@@ -1,8 +1,8 @@
 ---
 id: 64498b085028fc30a58bb6a7
-title: Step 41
+title: Step 42
 challengeType: 0
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
index 138dd646f57..d0a3366315c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0889c6ff4baa46ac1c50
-title: Step 42
+title: Step 43
 challengeType: 0
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
index 5e9553c4f08..716a7d4ca9a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
@@ -1,8 +1,8 @@
 ---
 id: 646d09a07241aaab1e777080
-title: Step 43
+title: Step 44
 challengeType: 0
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
index f6f2e9f04f8..685d62ba96b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0a022da7bcabf3e3aca3
-title: Step 44
+title: Step 45
 challengeType: 0
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
index 80bdecd96af..28ec9801c66 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0d20108440acc95a6b32
-title: Step 45
+title: Step 46
 challengeType: 0
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
index cff8296a62c..e8720b88a53 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0db5175974ad8633b71c
-title: Step 46
+title: Step 47
 challengeType: 0
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
index 01b5ba54ade..d5c1b76abff 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0e4636e14eae2bb3b992
-title: Step 47
+title: Step 48
 challengeType: 0
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
index 99a2c62b86f..bce3cb02167 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1980018efaaec2b1c28b
-title: Step 48
+title: Step 49
 challengeType: 0
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
index bc5b22d1fb4..7f8eb0a90b8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
@@ -1,8 +1,8 @@
 ---
 id: 646d19fc4705e4af65c3e688
-title: Step 49
+title: Step 50
 challengeType: 0
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
index 52f9c557011..d076c93f8b1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1b96dd7ea4b0061458bc
-title: Step 50
+title: Step 51
 challengeType: 0
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
index 0b857a3e256..fb0d686e40d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
@@ -1,13 +1,13 @@
 ---
 id: 646d1cadf0d96ab0b7e12da4
-title: Step 51
+title: Step 52
 challengeType: 0
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
 
-Because `elemValue` returns a function, your `addChars` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
+Because `elemValue` returns a function, your `addCharacters` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
 
 <!-- TODO: Explain further? -->
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
index fbf8e85a58e..c1ef0ae4591 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1d67f9261fb15a795588
-title: Step 52
+title: Step 53
 challengeType: 0
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
index 7b7d1f19807..81a967ea80d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1e531042dfb24da1f032
-title: Step 53
+title: Step 54
 challengeType: 0
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
@@ -16,13 +16,13 @@ The callback function takes a few parameters. The first is the matched string. P
 You should pass an arrow function as the second argument to your `.replace()` method.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 Your arrow function should take a `match` parameter.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
index 126938480b8..4e0bdcafe1b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3141790b3cb337dd611a
-title: Step 54
+title: Step 55
 challengeType: 0
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
index 61fd0d95ed3..a976d2e313d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
@@ -1,8 +1,8 @@
 ---
 id: 646d382c4d70ceb3dba1e830
-title: Step 55
+title: Step 56
 challengeType: 0
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
index 76aac232f63..7a1435a9e93 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
@@ -1,8 +1,8 @@
 ---
 id: 646d386a685620b49db4be76
-title: Step 56
+title: Step 57
 challengeType: 0
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
index 9c0e9c37fcb..c6980b6b44a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38c326f3c8b54023de38
-title: Step 57
+title: Step 58
 challengeType: 0
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
index 34ed75c88f9..0af42bfb322 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38f906b94cb5fe6ce7de
-title: Step 58
+title: Step 59
 challengeType: 0
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
index 4152f3e33e2..daa12199dcb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3952f6af37b6a1c241c2
-title: Step 59
+title: Step 60
 challengeType: 0
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
index 8a0dcbe6389..e9f8b5ce15d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
@@ -1,8 +1,8 @@
 ---
 id: 646d39c156fe94b7482c3ab6
-title: Step 60
+title: Step 61
 challengeType: 0
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
index 6f36595bdf7..3fa9bd07097 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3b27cd3c56b875256301
-title: Step 61
+title: Step 62
 challengeType: 0
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
index 6f3e2a471bb..4e1043eecb1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3bc75fe0c9b972da3323
-title: Step 62
+title: Step 63
 challengeType: 0
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
index b3816a73b01..ec294284249 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3c146e10b0ba222bb2a7
-title: Step 63
+title: Step 64
 challengeType: 0
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
index 837aebe275a..747899bb3e3 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d037872fbbae0a8ec0e
-title: Step 64
+title: Step 65
 challengeType: 0
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
index a525cab6136..022a6c568cb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d65be79c8bb9c7df9ff
-title: Step 65
+title: Step 66
 challengeType: 0
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
index 16e5f6e6860..9615d7f929a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d80c3b4aebc4103618e
-title: Step 66
+title: Step 67
 challengeType: 0
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
index cc013f1dae7..196385d39b2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3da8501e15bcd355ba1d
-title: Step 67
+title: Step 68
 challengeType: 0
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
index a96beee9c4f..3cb7c61d53f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e135ab3abbdbfe5c899
-title: Step 68
+title: Step 69
 challengeType: 0
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
index 0f352f2b9d5..8c653ee86f4 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e64b15f92be6e61704e
-title: Step 69
+title: Step 70
 challengeType: 0
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str
 Your callback function should use bracket notation to access the property of the `infixToFunction` object that matches the value of the `operator` parameter.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
index 70bf445b5cf..cd6d06d7e99 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3ee7b17ae3bf48610033
-title: Step 70
+title: Step 71
 challengeType: 0
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
@@ -14,19 +14,19 @@ dashedName: step-70
 Your callback function should return the result of calling `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(/);
 ```
 
 You should pass `arg1` as the first argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1/);
 ```
 
 You should pass `arg2` as the second argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
index 27f21057126..2145e640b31 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f1fd12f76c02c823bb8
-title: Step 71
+title: Step 72
 challengeType: 0
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
@@ -16,13 +16,13 @@ Wrap each of your `infixToFunction[operator]` arguments in a `parseFloat()` call
 You should wrap `arg1` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
 ```
 
 You should wrap `arg2` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
index e8de07b79d4..f9fcf26f42e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f718b5f8dc102cd528e
-title: Step 72
+title: Step 73
 challengeType: 0
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
index 4e80c7f3964..d7bdc37d7b2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
@@ -1,8 +1,8 @@
 ---
 id: 646d404259f512c1a9e86ac1
-title: Step 73
+title: Step 74
 challengeType: 0
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
index 4973e069b9c..167d450138d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40c543943ec250039682
-title: Step 74
+title: Step 75
 challengeType: 0
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
index 5895088e8ea..660a596da8e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40fe4b7b50c30c2b4cd8
-title: Step 75
+title: Step 76
 challengeType: 0
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
index 7fe83fcacfb..0bc08a4012e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
@@ -1,8 +1,8 @@
 ---
 id: 646d41e23b583fc3b8cc4579
-title: Step 76
+title: Step 77
 challengeType: 0
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
index cbd2f59f0dc..16562b4bb2f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
@@ -1,8 +1,8 @@
 ---
 id: 646d423fade4a9c4636acd13
-title: Step 77
+title: Step 78
 challengeType: 0
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
index 862ff6ebe14..efc5d0ffc18 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
@@ -1,8 +1,8 @@
 ---
 id: 646d42f58deb2fc52adc6611
-title: Step 78
+title: Step 79
 challengeType: 0
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
index b9387c25525..02383be897f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d43587d926bc5b6cb2e50
-title: Step 79
+title: Step 80
 challengeType: 0
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
index 521cb0a4b09..1ea064565a1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d448479c8fdc8dcec868c
-title: Step 80
+title: Step 81
 challengeType: 0
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
index 838f0f961d0..b6fe908bbf8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d44da986f2bc9b72f5fe2
-title: Step 81
+title: Step 82
 challengeType: 0
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
index b2ee3df825b..3d6821dadd1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
@@ -1,8 +1,8 @@
 ---
 id: 646d451c2e44afca71b67818
-title: Step 82
+title: Step 83
 challengeType: 0
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
index 5900d07b82b..18d0465bd29 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4554721d43cb19a68bc4
-title: Step 83
+title: Step 84
 challengeType: 0
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
@@ -28,13 +28,13 @@ assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*cons
 Your `apply` function should access the property of the `spreadsheetFunctions` object that matches the `fn` value.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn/);
 ```
 
 Your `apply` function should call the `.toLowerCase()` method on `fn` in the property access.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]/);
 ```
 
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
index 19876a4452f..b14d113cdfd 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45b739da5ecbf830c108
-title: Step 84
+title: Step 85
 challengeType: 0
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Your `apply` function is returning the spreadsheet function, but not actually ap
 Your `apply` function should call the `spreadsheetFunctions[fn.toLowerCase()]` function.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(/);
 ```
 
 You should pass a `toNumberList()` call to your `spreadsheetFunctions[fn.toLowerCase()]` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(/);
 ```
 
 You should pass `args` to your `toNumberList()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
index b44378895e2..95734fb4ffe 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45ee725632cca2555146
-title: Step 85
+title: Step 86
 challengeType: 0
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Now your `applyFunction` needs to return a result. Return the result of calling
 Your `applyFunction` function should return the result of calling the `.replace()` method on `str2`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(/);
 ```
 
 You should pass `functionCall` as the first argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall/);
 ```
 
 You should pass an empty arrow function as the second argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
 ```
 
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
index 07688aaca12..8eb18bbd464 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4626420eeecd51f241c2
-title: Step 86
+title: Step 87
 challengeType: 0
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Remember to make `fn` lower case.
 Your callback function should have `match` as the first parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
 ```
 
 Your callback function should have `fn` as the second parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
 ```
 
 Your callback function should have `args` as the third parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
 ```
 
 Your callback function should use an implicit return.
 
 ```js
-assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
+assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
 ```
 
 Your callback function should return the result of calling the `.hasOwnProperty()` method on the `spreadsheetFunctions` object.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
 ```
 
 You should pass `fn` to the .`hasOwnProperty()` method.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn/);
 ```
 
 You should call the `.toLowerCase()` method on `fn`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
index 8d640506e46..1fd62328533 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d467c6994f4ce0dc416a4
-title: Step 87
+title: Step 88
 challengeType: 0
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
@@ -14,31 +14,31 @@ Use the ternary operator to turn your `.hasOwnProperty()` call into the conditio
 Your callback function should use ternary syntax.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
 ```
 
 If the ternary condition is true, your callback function should return the result of calling `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\s*\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\s*\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
 ```
 
 You should pass `fn` as the first argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
 ```
 
 You should pass `args` as the second argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
 ```
 
 If the ternary is false, you should return `match`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
index 74d0e548a74..222c5c8a20d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
@@ -1,8 +1,8 @@
 ---
 id: 646d46c03e7d02cecb30f021
-title: Step 88
+title: Step 89
 challengeType: 0
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
@@ -14,25 +14,25 @@ Now you can start applying your function parser to your `evalFormula` logic. Dec
 You should declare a `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
 ```
 
 You should use `const` to declare your `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*const\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*const\s+functionExpanded\s*=\s*/);
 ```
 
 You should assign the `functionExpanded` variable the result of calling your `applyFunction` function.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
 ```
 
 You should pass `cellExpanded` to your `applyFunction` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
index 7f803a2ba8b..48b1cab80ed 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4717a689e1cfa232e357
-title: Step 89
+title: Step 90
 challengeType: 0
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Use a ternary to check if `functionExpanded` is equal to the original string `x`
 Your `evalFormula` function should use the `return` keyword.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
 ```
 
 Your `return` statement should check if `functionExpanded` is equal to `x`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
 ```
 
 Your `return` statement should use a ternary operator.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
 ```
 
 If the ternary condition is true, your `evalFormula()` should return `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
 ```
 
 If the ternary condition is false, your `evalFormula()` should return the result of calling `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
 ```
 
 You should pass `functionExpanded` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
 ```
 
 You should pass `cells` as the second argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
index c9b3155ab77..c1249111d86 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4769ba65f1d05ef6b634
-title: Step 90
+title: Step 91
 challengeType: 0
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
@@ -16,19 +16,19 @@ Inside your `if` statement, set the `value` of the `element` to be the result of
 You should update the `value` property of `element` in your `if` block.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
 ```
 
 You should assign the `value` property the result of calling your `evalFormula()` function.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
 ```
 
 You should not pass any arguments to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
index 2b8ba01ca6f..9ef5920b36a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
@@ -1,8 +1,8 @@
 ---
 id: 646d47c8f58107d10f1e5106
-title: Step 91
+title: Step 92
 challengeType: 0
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
@@ -14,19 +14,19 @@ The first argument for your `evalFormula` call needs to be the contents of the c
 You should pass `value` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
 ```
 
 You should call the `.slice()` method on the `value` argument.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(/);
 ```
 
 You should pass the number `1` as the argument to your `.slice()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(\s*1\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
index bfc7354c9b4..c2b4d2b8c71 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4813c17b37d1e261a566
-title: Step 92
+title: Step 93
 challengeType: 0
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
@@ -14,19 +14,19 @@ You can quickly get all cells from your page by getting the `#container` element
 For the second parameter of your `evalFormula()` call, you should call the `.getElementById()` method of the `document` object.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
 ```
 
 You should pass `container` as the argument to your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
 ```
 
 You should access the `children` property of the result of your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
index 42ac008ff41..ac6184b9d56 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
@@ -1,8 +1,8 @@
 ---
 id: 646d486aec20f7d2a581cc36
-title: Step 93
+title: Step 94
 challengeType: 0
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
@@ -14,7 +14,7 @@ Unfortunately, that `children` property is returning a collection of elements, w
 You should wrap your `document.getElementById('container').children` in `Array.from()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
index 255197e54a6..98ffeb00088 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
@@ -1,8 +1,8 @@
 ---
 id: 646d48b936802fd34c3f05af
-title: Step 94
+title: Step 95
 challengeType: 0
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
index 0dd57f1224b..a4c682f9df4 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d498c8ebc31d3f753b22e
-title: Step 95
+title: Step 96
 challengeType: 0
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
index 2a2788f4b10..43c6ebe6441 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
@@ -1,8 +1,8 @@
 ---
 id: 646d49bfff9079d4b38df115
-title: Step 96
+title: Step 97
 challengeType: 0
-dashedName: step-96
+dashedName: step-97
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
index 12c4eb6bf15..0e9787dff11 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a07a8fb14d55cd70e09
-title: Step 97
+title: Step 98
 challengeType: 0
-dashedName: step-97
+dashedName: step-98
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
index 7c43db10dd0..983d30989b0 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a5b32a1cad6165df286
-title: Step 99
+title: Step 100
 challengeType: 0
-dashedName: step-99
+dashedName: step-100
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
index 1123c7fe781..34ae3e371aa 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a8dbc04c6d6bb0001f8
-title: Step 100
+title: Step 101
 challengeType: 0
-dashedName: step-100
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
index d89f6df3612..b221e737fdb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4ab9b3b4c5d74fdd2154
-title: Step 101
+title: Step 102
 challengeType: 0
-dashedName: step-101
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
index edb35c09bd0..89e89d3ac90 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4b3d80ea98d824c8a4f9
-title: Step 102
+title: Step 103
 challengeType: 0
-dashedName: step-102
+dashedName: step-103
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
index ec55d6b9819..eb5424ffa9d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
@@ -1,8 +1,8 @@
 ---
 id: 6491d38f5b09a021c4b5d5fe
-title: Step 98
+title: Step 99
 challengeType: 0
-dashedName: step-98
+dashedName: step-99
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
new file mode 100644
index 00000000000..3a606f8e1cf
--- /dev/null
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
@@ -0,0 +1,104 @@
+---
+id: 65ae458e23954c3469e0c209
+title: Step 18
+challengeType: 0
+dashedName: step-18
+---
+
+
+# --description--
+
+In earlier projects you learned about the `setAttribute` method. Another way to update an attribute in JavaScript is to use the following syntax:
+
+```js
+el.attribute = value;
+```
+
+The property names for hyphenated HTML attribute values, such as `aria-label`, follow camel case, becoming `ariaLabel`.
+
+```js
+el.ariaLabel = "Aria Label Value";
+```
+
+Set the `aria-label` attribute for the `input` element to the same value as the `id` attribute.
+
+
+# --hints--
+
+You should have an `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=/);
+```
+
+
+You should assign `letter + number` to `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=\s*letter\s*\+\s*number/);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="./styles.css" />
+    <title>Functional Programming Spreadsheet</title>
+  </head>
+  <body>
+    <div id="container">
+      <div></div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+#container {
+  display: grid;
+  grid-template-columns: 50px repeat(10, 200px);
+  grid-template-rows: repeat(11, 30px);
+}
+
+.label {
+  background-color: lightgray;
+  text-align: center;
+  vertical-align: middle;
+  line-height: 30px;
+}
+```
+
+```js
+const range = (start, end) => Array(end - start + 1).fill(start).map((element, index) => element + index);
+const charRange = (start, end) => range(start.charCodeAt(0), end.charCodeAt(0)).map(code => String.fromCharCode(code));
+
+window.onload = () => {
+  const container = document.getElementById("container");
+  const createLabel = (name) => {
+    const label = document.createElement("div");
+    label.className = "label";
+    label.textContent = name;
+    container.appendChild(label);
+  }
+  const letters = charRange("A", "J");
+  letters.forEach(createLabel);
+  range(1, 99).forEach(number => {
+     createLabel(number);
+--fcc-editable-region--
+    letters.forEach(letter => {
+     const input = document.createElement("input");
+     input.type = "text";
+     input.id = letter + number;
+
+    })   
+--fcc-editable-region--
+  })
+}
+```
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
index 490f8bf282b..503264aa173 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
@@ -16,7 +16,7 @@ Now you should be able to roll the dice a few times and see the values update.
 You should call your `updateStats` function inside the `else` clause.
 
 ```js
-assert.match(code, /updateStats\(\)/)
+assert.match(code, /updateStats\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
index 5a9a106e86f..ac65121ef4e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
@@ -28,7 +28,7 @@ assert.match(code, /const\s+updateRadioOption\s*=\s*\(.*\)\s*=>\s*{\s*[\s\S]*};?
 Your `updateRadioOption` function should take `optionNode` and `score` as parameters.
 
 ```js
-assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\)\s*=>\s*{\s*[\s\S]*};?/)
+assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\s*\)\s*=>\s*{\s*[\s\S]*};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
index 0e5b892c84e..0c73d9641be 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
@@ -14,7 +14,7 @@ To enable the radio buttons, you should set the `disabled` property on `scoreInp
 You should assign `false` to `scoreInputs[optionNode].disabled`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.disabled\s*=\s*false/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.disabled\s*=\s*false/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
index b7d74ca550f..6431e163763 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
@@ -14,7 +14,7 @@ Next, you will need to update the radio button's `value` to the current `score`.
 You should assign the `score` variable to `scoreInputs[optionNode].value`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.value\s*=\s*score/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.value\s*=\s*score/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
index db209675ef8..55677fba349 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
@@ -14,7 +14,7 @@ To display the current score, update the text content for the `span` element nex
 You should set the `textContent` property for `scoreSpans[optionNode]` to the following template literal: `, score = ${score}`.
 
 ```js
-assert.match(code, /scoreSpans\[\s*optionNode\s*\]\.textContent\s*=\s*`, score = \${score}`;?/);
+assert.match(code, /scoreSpans\s*\[\s*optionNode\s*\]\s*\.textContent\s*=\s*`, score = \${score}`;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
index 1c6aa8c89ae..7b440504a99 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
@@ -22,7 +22,7 @@ assert.match(code, /updateRadioOption\(.*\);?/);
 You should have the arguments of `0` and `10` for the `updateRadioOption` function.
 
 ```js
-assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
index 5c4450b14a7..9fbc34c8d6f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
@@ -14,7 +14,7 @@ Now that you have verified the `updateRadioOption` function works, remove the fu
 You should remove the `updateRadioOption` function call from your `else` clause.
 
 ```js
-assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
index 3fd0ce0842c..db5f822ad99 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
@@ -18,19 +18,19 @@ Below your `if` statement, include an `else` clause that assigns `1` to `counts[
 You should have an `if` statement with a condition of `counts[num]`.
 
 ```js
-assert.match(code, /if\s*\(\s*counts\[num\]\s*\)/);
+assert.match(code, /if\s*\(\s*counts\s*\[\s*num\s*\]\s*\)/);
 ```
 
 You should use the `++` operator to increment the value of `counts[num]` by `1` inside your `if` statement.
 
 ```js
-assert.match(code, /counts\[num\]\s*\+\s*=\s*1|counts\[num\]\+\+/);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*\+\s*=\s*1|counts\s*\[\s*num\s*\]\s*\+\+/);
 ```
 
 You should assign `1` to `counts[num]` inside your `else` clause.
 
 ```js
-assert.match(code, /else\s*\{\s*counts\[num\]\s*=\s*1\s*;?\s*\}/);
+assert.match(code, /else\s*\{\s*counts\s*\[\s*num\s*\]\s*=\s*1\s*;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
index 9adc1a6d6ec..e3ecf2b40b2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
@@ -22,7 +22,7 @@ assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s
 You should assign `counts[num]` to your `count` variable.
 
 ```js
-assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\[num\]\s*;?\s*}/);
+assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\s*\[\s*num\s*\]\s*;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
index 274b3259681..4fa473f4764 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
@@ -16,7 +16,7 @@ Now, try rolling the dice again and you should see that the previous score `inpu
 You should call the `resetRadioOption` function inside the `rollDiceBtn` callback function.
 
 ```js
-assert.match(code, /resetRadioOption\(\);?/);
+assert.match(code, /resetRadioOption\(\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
index 34d6c27cf6b..e5458674ef9 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
@@ -22,7 +22,7 @@ assert.isFunction(resetGame);
 You should use arrow syntax for your `resetGame` function.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*}\s*;?/);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
index 01e24ad236b..1a5227bf4b7 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
@@ -24,25 +24,25 @@ assert.match(code, /diceValuesArr\s*=\s*\[\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s
 You should reassign the `score` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `totalScore` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `rolls` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `round` variable to `1`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
index 963991ec9ef..86be2711cb7 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
@@ -14,13 +14,13 @@ To reset each of the dice values to show `0`, apply a `forEach` method to the `l
 You should call the `forEach` method of the `listOfAllDice` variable.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
 ```
 
 For your callback function, you should use `dice` and `index` as parameters.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
index ed8bb107e6d..13826a14e37 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
@@ -14,13 +14,13 @@ Inside your callback function, update the `dice` text content by assigning it th
 You should access the `textContent` property of the `dice` parameter.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
 ```
 
 You should assign `diceValuesArr[index]` to `dice.textContent`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
index 9cf0942f56a..67b74f7ad9e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
@@ -20,25 +20,25 @@ Lastly, update the `currentRoundText` text content by assigning it the `round` v
 You should assign `totalScore` to `totalScoreText.textContent`.
 
 ```js
-assert.match(code, /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
+assert.match(resetGame.toString(), /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
 ```
 
 You should use the `innerHTML` property to set the `scoreHistory` to an empty string.
 
 ```js
-assert.match(code, /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
+assert.match(resetGame.toString(), /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
 ```
 
 You should assign `rolls` to `currentRoundRollsText.textContent`.
 
 ```js
-assert.match(code, /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
+assert.match(resetGame.toString(), /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
 ```
 
 You should assign `round` to `currentRoundText.textContent`.
 
 ```js
-assert.match(code, /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
+assert.match(resetGame.toString(), /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
index 449e5cfd8af..42e424a9e4a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
@@ -16,7 +16,7 @@ Assign the entire result of your `ternary` to `counts[num]`.
 You should assign `counts[num] ? counts[num] + 1 : 1` to `counts[num]` in the `for...of` loop.
 
 ```js
-assert.match(code, /counts\[num\]\s*=\s*counts\[num\]\s*\?\s*counts\[num\]\s*\+\s*1\s*:\s*1\s*;?/s);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*=\s*counts\s*\[\s*num\s*\]\s*\?\s*counts\s*\[\s*num\s*\]\s*\+\s*1\s*:\s*1\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
index 468e993d8ad..152c814123f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasThreeOfAKind\s*=/);
 You should assign `Object.values(counts)` to your `hasThreeOfAKind` variable.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(3)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\)\.includes\(3\)\s*;?/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*3\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
index 44f0fc273ea..1f32ec12cbb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasPair\s*=/);
 You should assign `Object.values(counts)` to your `hasPair` variable.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(2)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\)\.includes\(2\)\s*;?/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*2\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
index f976724e4a2..50fabfdd642 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
@@ -36,7 +36,7 @@ assert.match(code, /const\s+sortedNumbersArr\s*=\s*arr\.sort\(.*\);?/);
 Your callback function should use `a` and `b` for the parameters and implicitly return `a - b`.
 
 ```js
-assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(a,\s*b\)\s*=>\s*a\s*-\s*b\s*\));?/);
+assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(\s*a,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\));?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
index c204cccfc44..d430628dba5 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+smallStraightsArr\s*=?\s*;?/);
 You should store the strings `1234`, `2345` and `3456` in an array and assign it to your `smallStraightsArr`.
 
 ```js
-assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\];?/);
+assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
index c6cfff57683..09b73883436 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+largeStraightsArr\s*=?\s*;?/);
 You should store the strings `12345` and `23456` in an array and assign it to your `largeStraightsArr`.
 
 ```js
-assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\];?/);
+assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
index bf2aa9941a5..34d5ee3d5da 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `smallStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `3` and `30` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
index d982aef072f..f0ee7bc7f10 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `largeStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `4` and `40` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
index cae7645f18a..4bd72562aa6 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
@@ -16,7 +16,7 @@ Inside the `animate` function, create an `if` statement where the condition chec
 You should have an `if` statement that checks if the right key was pressed and the player's `x` position is less than 400.
 
 ```js
-assert.match(animate.toString(), /keys\.rightKey\.pressed\s*&&\s*player\.position\.x\s*<\s*400/);
+assert.match(animate.toString(), /keys\.rightKey\.(pressed|pressed\s*===\s*true)\s*&&\s*player\.position\.x\s*<\s*400/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
index b08537e33ef..2bc5e567f4f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
@@ -30,7 +30,7 @@ assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*
 You should call the `draw` method on each `platform`.
 
 ```js
-assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\)\s*;?\s*}?\s*\);?/);
+assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\s*\)\s*;?\s*}?\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
index 9f7587a21d9..79eda0fba07 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
@@ -26,7 +26,7 @@ Your callback function should have a `platform` parameter.
 
 ```js
 const splitter = code.split("platform.position.x += 5;")
-assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\);?/);
+assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
index 2f93bab525f..4183273e53c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
@@ -9,17 +9,17 @@ dashedName: step-78
 
 Inside the callback function, create a new `const` variable called `collisionDetectionRules` and assign it an empty array.
 
-Inside that array, add a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+Inside that array, add a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 # --hints--
 
 You should have a `const` variable called `collisionDetectionRules` that is assigned an empty array.
 
 ```js
-assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\];?/);
+assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\s*\]\s*;?/);
 ```
 
-You should have a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+You should have a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 ```js
 assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*player\.position\.y\s*\+\s*player\.height\s*<=\s*platform\.position\.y\s*,?\s*]\s*;?/);
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
index 4bde13df3b4..58abfdfbe35 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
@@ -14,7 +14,7 @@ Inside that array, add a boolean expression that checks if the player's `x` posi
 You should have a boolean expression that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
index be5c847d0e4..6f9308ec65d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
@@ -14,7 +14,7 @@ Below that boolean expression, add another boolean expression that checks if the
 You should have a boolean expression that checks if the player's `x` position is less than or equal to the sum of the platform's `x` position and the platform's width minus one third of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
index 8d05627ce2b..2affd7ae4c1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
@@ -16,21 +16,21 @@ Below that, add another boolean expression that checks if the player's `y` posit
 You should not alter the existing `platformDetectionRules` array and its content.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position plus the player's height is greater than or equal to the platform's `y` position.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position is less than or equal to the sum of the platform's `y` position plus the platform's height.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\]\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
index 436b88a8f29..55173875215 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
@@ -19,21 +19,21 @@ Your `CheckPoint` class should have a `draw` method.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{/);
 ```
 
 Your `draw` method should have a `fillStyle` property.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
 ```
 
 Your `draw` method should have a `fillRect` method.
 
 ```js
 const splitter = code.split('#f1be32')
-assert.match(splitter[1], /ctx\.fillRect\(this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\);?/);
+assert.match(splitter[1], /ctx\.fillRect\(\s*this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
index 0f6aa833af9..ecedd30bbea 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
@@ -25,14 +25,14 @@ assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\([^
 Your callback function should have a `checkpoint` parameter.
 
 ```js
-assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*[^)]*\s*\)\s*;?/);
+assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*[^)]*\s*\)\s*;?/);
 
 ```
 
 You should implicitly return a new `CheckPoint` instance.
 
 ```js
-assert.match(code, /\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
+assert.match(code, /\s*checkpointPositions\.map\s*\(\s*(\(checkpoint\s*\)|checkpoint)\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
index 4c2b75d6d8c..35533919bb2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
@@ -24,13 +24,13 @@ assert.match(code, /\bcheckpoints\b\s*\.\s*forEach\s*\(/s);
 You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*checkpoint\s*=>\s*{/s);
+assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*{?/s);
 ```
 
 You should call the `draw` method on each `checkpoint` inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\.forEach\s*\(\s*checkpoint\s*=>\s*{\s*checkpoint\.draw\(\s*\);?\s*}\s*\);?/s);
+assert.match(code, /\s*checkpoints\.forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*(\{\s*checkpoint\.draw\(\s*\)\s*;?\s*\}|checkpoint\.draw\(\s*\))\s*\)\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
index a470a035eb7..12050701935 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
@@ -24,7 +24,7 @@ You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
 const splitter = code.split("if (keys.rightKey.pressed && isCheckpointCollisionDetectionActive)")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(?checkpoint\)?\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*\{/);
 ```
 
 You should use the subtraction assignment operator to subtract 5 from the `checkpoint`'s `x` position.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
index 69e219ac7dd..373b02e6486 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
@@ -42,7 +42,7 @@ assert.match(code, /\s*setTimeout\s*\(\s*\(\s*\)\s*=>[^,]*,\s*2000\s*\)/s);
 Your callback function should set the `checkpointScreen` `display` property to `none`.
 
 ```js
-assert.match(code, /\s*if\s*\(isCheckpointCollisionDetectionActive\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
+assert.match(code, /\s*if\s*\(\s*isCheckpointCollisionDetectionActive\s*\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
index e9b8c28b3aa..a59debae637 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
@@ -24,7 +24,7 @@ Your callback function should have a `checkpoint` parameter and `index`.
 
 ```js
 const splitter = code.split("player.velocity.y = gravity;")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(checkpoint,\s*index\)\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*\(\s*checkpoint,\s*index\s*\)\s*=>\s*\{/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
index e22063744f2..f7bbbb1edad 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
@@ -14,7 +14,7 @@ Inside the `if` statement, call the `claim` method on the `checkpoint` object.
 You should call the `claim()` method on the `checkpoint` object.
 
 ```js
-assert.match(code, /checkpoint\.claim\(\);?/)
+assert.match(code, /checkpoint\.claim\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
index 917576aaa19..93460e80702 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
@@ -24,7 +24,7 @@ assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\
 You should call the `showCheckpointScreen` function and pass in "You reached the final checkpoint!" as an argument.
 
 ```js
-assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\);?/)
+assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(\s*("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\s*\);?/)
 ```
 
 You should call the `movePlayer` function and pass in the provided arguments.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
index 79fdb32b9c3..711e173f5d5 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
@@ -18,37 +18,37 @@ Begin by accessing the `task-form`, `confirm-close-dialog`, and `open-task-form-
 You should use `getElementById()` to access the `task-form` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should assign the `task-form` element to the variable `taskForm`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `confirm-close-dialog` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should assign the `confirm-close-dialog` element to the variable `confirmCloseDialog`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `open-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `open-task-form-btn` element to the variable `openTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
index 2d41b6debe4..6fd78b852ca 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
@@ -14,37 +14,37 @@ You need to access more elements with the `getElementById()` method. This time y
 You should use `getElementById()` to access the `close-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `close-task-form-btn` element to the variable `closeTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `add-or-update-task-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should assign the `add-or-update-task-btn` element to the variable `addOrUpdateTaskBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `cancel-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 You should assign the `cancel-btn` element to the variable `cancelBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
index 216037a9035..941c82e6291 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
@@ -14,37 +14,37 @@ Next, access the `discard-btn`, `tasks-container`, and `title-input` elements us
 You should use `getElementById()` to access the `discard-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should assign the `discard-btn` element to the variable `discardBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `tasks-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should assign the `tasks-container` element to the variable `tasksContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `title-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 You should assign the `title-input` element to the variable `titleInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
index 3f157771ed9..50e9360f0c3 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
@@ -14,25 +14,25 @@ The last set of elements you need to get from the HTML file are the `date-input`
 You should use `getElementById()` to access the `date-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should assign the `date-input` element to the variable `dateInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `description-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 You should assign the `description-input` element to the variable `descriptionInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
index 0b69dc4d1cb..ff4454def4d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
@@ -13,16 +13,40 @@ Use `let` to create a `currentTask` variable and set it to an empty object. This
 
 # --hints--
 
-You should create a `taskData` constant set to an empty array.
+You should have a `const` variable called `taskData`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=/)
 ```
 
-You should use `let` to create an empty `currentTask` object.
+You should assign an array to your `taskData` constant.
 
 ```js
-assert.match(code, /let\s+currentTask\s*=\s*\{\};?/)
+assert.isArray(taskData);
+```
+
+Your `taskData` array should be empty.
+
+```js
+assert.isEmpty(taskData);
+```
+
+You should use `let` to create a `currentTask` variable.
+
+```js
+assert.match(code, /let\s+currentTask/);
+```
+
+You should assign an object to your `currentTask` variable.
+
+```js
+assert.isObject(currentTask);
+```
+
+Your `currentTask` object should be empty.
+
+```js
+assert.isEmpty(currentTask);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
index 65871e122e5..3e9c22c7574 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
@@ -7,9 +7,15 @@ dashedName: step-7
 
 # --description--
 
-Add a `click` event listener to the `closeTaskFormBtn` variable, then use the `showModal()` method on your `confirmCloseDialog` variable. This will display a modal with the `Discard` and `Cancel` buttons.
+The HTML `dialog` element has a `showModal()` method that can be used to display a modal dialog box on a web page.
 
-`showModal()` is a method associated with the HTML `dialog` element. It is used to display a modal dialog box on a web page.
+```js
+dialogElement.showModal();
+```
+
+Add an event listener to the `closeTaskFormBtn` variable and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `showModal()` method on the `confirmCloseDialog` element. This will display a modal with the `Discard` and `Cancel` buttons.
 
 # --hints--
 
@@ -22,13 +28,13 @@ assert.match(code, /closeTaskFormBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `showModal()` method on `confirmCloseDialog`.
+Your event listener's callback function should call the `showModal()` method on the `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1,\s*\(.*\)\s*=>\s*{?\s*confirmCloseDialog\.showModal\(\);?\s*}?\s*\);?/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1,\s*\(.*\)\s*=>\s*(\{\s*confirmCloseDialog\.showModal\(\s*\)\s*;?\s*\}|confirmCloseDialog\.showModal\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
index 58e4e3b0846..a6aad2ff0d2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
@@ -7,11 +7,15 @@ dashedName: step-8
 
 # --description--
 
-If the user clicks the `Cancel` button, you want to cancel the process (close the modal showing the two buttons) so the user can continue editing.
+If the user clicks the `Cancel` button, you want to cancel the process and close the modal so the user can continue editing. The HTML `dialog` element has a `close()` method that can be used to close a modal dialog box on a web page.
 
-Add a `click` event listener to the `cancelBtn` element, then use the `close()` method on the `confirmCloseDialog` variable.
+```js
+dialogElement.close();
+```
 
-`close()` is a method of the window object you can use to close the current window, or a modal you create with the `dialog` element.
+Add an event listener to the `cancelBtn` element and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `close()` method on the `confirmCloseDialog` element.
 
 # --hints--
 
@@ -24,13 +28,13 @@ assert.match(code, /cancelBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `close()` method on `confirmCloseDialog`. Don't use curly braces.
+Your event listener's callback function should call the `close()` method on `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1\,\s*\(\)\s*\s*=>\s*confirmCloseDialog\.close\(\)\s*\);?/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1\s*\,\s*\(\s*\)\s*=>\s*(\{\s*confirmCloseDialog\.close\(\s*\)\s*;?\s*\}|confirmCloseDialog\.close\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
index 5b5ca6c3ec7..f57a75a6b94 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
@@ -28,19 +28,19 @@ assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1/)
 You should use arrow syntax to set your event listener to an empty pair of curly braces.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 Your event listener should use the `close()` method on `confirmCloseDialog`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?/)
 ```
 
 Your event listener should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
index 8540630eb6b..1ffca402e0e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
@@ -22,19 +22,19 @@ assert.match(code, /taskForm\.addEventListener\(/)
 Your event listener should listen for a `submit` event.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1/)
 ```
 
 You should use arrow syntax to set your event listener to an empty pair of curly braces with `e` as the parameter.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
 ```
 
 You should use the `e.preventDefault()` method to stop the browser from reloading the page.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\);?/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
index 062a8afa5f9..006d4bb2153 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
@@ -35,13 +35,13 @@ assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 You should pass in `item` as the parameter of the arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === currentTask.id`.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
index 2a07077456e..217e6547857 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
@@ -30,19 +30,19 @@ assert.match(code, /const\s+taskObj\s*=\s*\{\s*id/)
 You should use template strings to get `titleInput.value` as the value of your `id` key and convert it to lowercase.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)/)
 ```
 
 You should use `.split(' ')` on `titleInput.value.toLowerCase()`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(('|")\s{1}\1\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)/)
 ```
 
 You should use `.join('-')` on `titleInput.value.toLowerCase().split(' ')`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
index f5f882434b3..b998804835e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
@@ -20,13 +20,13 @@ Create an `if` statement with the condition `dataArrIndex === -1`. Within the `i
 You should create an `if` statement with the condition `dataArrIndex === -1`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{/)
 ```
 
 Your `if` statement should have `taskData.unshift(taskObj)` in it's body.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}/)
 ```
 
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
index 9826fa47c55..7ea656a26ea 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
@@ -26,7 +26,7 @@ assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*(\s*\{?\(\s*ta
 You should use addition assignment to set the `innerHTML` of `tasksContainer` to an empty pair of backticks.
 
 ```js
-assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\)?\s*\}?)/)
+assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\s*\)?\s*\}?)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
index 32e59545715..01485b479fe 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
@@ -15,7 +15,7 @@ You should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("taskData.forEach")[1].split("});")
-assert.match(splitter[0], /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(splitter[0], /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
index bed5904e1ee..0d61313bd7b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
@@ -18,13 +18,13 @@ Use arrow syntax to create a `reset` function and set it to a pair of curly brac
 You should use `const` and arrow syntax to create a `reset` function.
 
 ```js
-assert.match(code, /const\s+reset\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+reset\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 Your `reset` function should be empty.
 
 ```js
-assert.match(reset.toString(), /\(\)\s*\{\s*\}/);
+assert.match(reset.toString(), /\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
index 7e2e549caac..6af664aa2fc 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
@@ -34,7 +34,7 @@ assert.match(reset.toString(), /descriptionInput\.value\s*=\s*('|")\1;?/)
 You should use `classList` to toggle the class `hidden` on `taskForm`
 
 ```js
-assert.match(reset.toString(), /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(reset.toString(), /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 You should set `currentTask` to an empty object.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
index 4e01822ed46..2e0541b14a7 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the `hidden` class on `taskForm`.
 
 ```js
 const splitter = code.split('<button type="button" class="btn">Delete</button>')
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /reset\(\)/)
+assert.match(code, /reset\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
index b66c1c949b0..1eb4980ed37 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("confirmCloseDialog.close();")
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /confirmCloseDialog\.close\(\);?\s*reset\(\);?/)
+assert.match(code, /confirmCloseDialog\.close\(\s*\);?\s*reset\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
index 25791de222f..6b6368a8439 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
@@ -16,7 +16,7 @@ To begin, within the `closeTaskFormBtn` event listener, create a `formInputsCont
 You should use `const` to create a variable `formInputsContainValues` with the value `titleInput.value || dateInput.value || descriptionInput.value;`
 
 ```js
-assert.match(code, /const\s+formInputsContainValues\s*=\s*titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value;?/)
+assert.match(code, /const\s+formInputsContainValues\s*=\s*(titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value|titleInput\.value\s*!==\s*null\s*\|\|\s*dateInput\.value\s*!==\s*null\s*\|\|\s*descriptionInput\.value\s*!==\s*null)\;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
index 4581ad6d4fa..cacb944bb9b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
@@ -14,25 +14,25 @@ Create an `if` statement to check if `formInputsContainValues` is true. If `form
 You should create an `if` statement with the condition `formInputsContainValues`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{/)
 ```
 
 The `if` block of your `if` statement should contain `confirmCloseDialog.showModal();`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `reset()` function in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{\s*reset\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{\s*reset\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
index 3363d165bb2..78bfb95196b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
@@ -16,7 +16,7 @@ Use arrow syntax to create an `addOrUpdateTask` function. Then move the `dataArr
 You should use `const` and arrow syntax to create an `addOrUpdateTask` function.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should move the `dataArrIndex` variable into the `addOrUpdateTask` function.
@@ -31,7 +31,7 @@ You should move the `taskObj` object into the `addOrUpdateTask` function.
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?/)
 ```
 
-You should move the `if` statement with the condition `dataArrIndex === 1` into your `addOrUpdateTask` function.
+You should move the `if` statement with the condition `dataArrIndex === -1` into your `addOrUpdateTask` function.
 
 ```js
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s*===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?\s*if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\)\s*;?\s*\}\s*\}\s*;?/)
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
index c37056959d5..ea76d720013 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
@@ -14,13 +14,13 @@ Use arrow syntax to create an `updateTaskContainer` function. Then move the `tas
 You should use `const` and arrow syntax to create a `updateTaskContainer` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 You should move `taskData.forEach()` and its content into the `updateTaskContainer()` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\{\s*id,\s*title,\s*date,\s*description\s*\}\)\s*=>\s*{\s*\(tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\)\s*}\s*\);?\s*\};?/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\s*\{\s*id,\s*title,\s*date,\s*description\s*\}\s*\)\s*=>\s*{\s*\(\s*tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\s*\)\s*}\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
index fd33f2f67fb..cdde0d313e1 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
@@ -14,13 +14,13 @@ Inside the `addOrUpdateTask` function, call the `updateTaskContainer` and `reset
 You should call the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\)\s*/)
+assert.match(code, /updateTaskContainer\(\s*\)\s*/)
 ```
 
 You should call the `reset` function after calling the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\);?\s*reset\(\);?\s*/)
+assert.match(code, /updateTaskContainer\(\s*\);?\s*reset\(\s*\);?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
index b427f1e9dd1..9608d26d428 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
@@ -14,7 +14,7 @@ Now remove the `reset()` call inside the `taskForm` submit event listener and ca
 You should remove `reset()` and call `addOrUpdateTask()`.
 
 ```js
-assert.match(code, /addOrUpdateTask\(\)/)
+assert.match(code, /addOrUpdateTask\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
index afaa870dadf..6908eb26cba 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
@@ -13,16 +13,16 @@ To enable editing and deleting for each task, add an `onclick` attribute to both
 
 # --hints--
 
-You should add `onclick="editTask(this)"` as the first attribute of the edit button.
+You should add `onclick="editTask(this)"` to your edit button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")editTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3\s*>Edit<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')editTask\(\s*this\s*\)\1)[^>]*>Edit<\/button>/);
 ```
 
-You should add `onclick="deleteTask(this)"` as the first attribute of the delete button.
+You should add `onclick="deleteTask(this)"` to your delete button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")deleteTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3>Delete<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')deleteTask\(\s*this\s*\)\1)[^>]*>Delete<\/button>/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
index 4ec4415c981..8c3c0eddb47 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable and set its value using the `findIndex()` metho
 You should not alter the `deleteTask` function.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
index 86dcdf1c5b7..a9414b20061 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
@@ -30,7 +30,7 @@ Use the `remove()` method to remove the `parentElement` of the `buttonEl` from t
 You should use the `remove()` method to remove the parent element of `buttonEl`.
 
 ```js
-assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\);?/)
+assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\s*\);?/)
 ```
 
 You should use `splice()` on the `taskData` array.
@@ -42,13 +42,13 @@ assert.match(deleteTask.toString(), /taskData\.splice\(/)
 The first argument of your `splice()` method should be `dataArrIndex`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex/)
 ```
 
 The second argument of your `splice()` method should be `1`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex,\s*1\);?/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex,\s*1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
index 12f943b50b0..e3256e34282 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable. For its value, utilize the `findIndex()` metho
 You should not alter the `editTask` function.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
index e502ac9784d..6bb3020b119 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
@@ -14,7 +14,7 @@ Use square bracket notation to retrieve the task to be edited from the `taskData
 You should assign `taskData[dataArrIndex]` to `currentTask`.
 
 ```js
-assert.match(code, /currentTask\s*=\s*taskData\[dataArrIndex\];?/)
+assert.match(code, /currentTask\s*=\s*taskData\s*\[\s*dataArrIndex\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
index e666d1ba889..00b33629a9c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
@@ -14,13 +14,13 @@ At this point, editing a task won't reflect when you submit the task. To make th
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 Your `else` block should have the code `taskData[dataArrIndex] = taskObj`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*taskData\[dataArrIndex\]\s*=\s*taskObj;?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*taskData\s*\[\s*dataArrIndex\s*\]\s*=\s*taskObj;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
index 9858a7312d0..a5ada0b0e3c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
@@ -26,13 +26,13 @@ After that, open your browser console and go to the `Applications` tab, select `
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 Your `localStorage.setItem()` should have a value of `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*myTaskArr\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*myTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
index c700fc3301c..2774ae15b26 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
@@ -16,13 +16,13 @@ To resolve the issue, wrap the data you're saving in the `JSON.stringify()` meth
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 You should wrap `JSON.stringify()` around `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*JSON\.stringify\(myTaskArr\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*JSON\.stringify\(\s*myTaskArr\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
index e153d2a48ea..16a1cfdc52a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
@@ -16,13 +16,13 @@ Use the `getItem()` method to retrieve the `myTaskArr` array and assign it to th
 You should use `const` to create a `getTaskArr` variable and assign `localStorage.getItem("data")` to it.
 
 ```js
-assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(('|")data\1\);?/)
+assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\1\s*\);?/)
 ```
 
 You should log the `getTaskArr` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArr\);?/)
+assert.match(code, /console\.log\(\s*getTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
index e682ee7d20f..d265e0d6ebf 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
@@ -18,13 +18,13 @@ Check the console to see the difference between `getTaskArr` and `getTaskObj`.
 You should use `const` to create a `getTaskArrObj` variable and assign it to `JSON.parse(localStorage.getItem('data'));`.
 
 ```js
-assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\);?/)
+assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\);?/)
 ```
 
 You should log the `getTaskArrObj` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArrObj\);?/)
+assert.match(code, /console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
index 7db423b7469..e0253fada55 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
@@ -16,7 +16,7 @@ Remove the `data` item from local storage and open the console to observe the re
 You should use `localStorage.removeItem()` to remove the `data` item from the browser's local storage.
 
 ```js
-assert.match(code, /localStorage\.removeItem\(('|")data\1\);?/)
+assert.match(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
index d9692e3fba7..56bb3c95d26 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
@@ -16,13 +16,13 @@ Remove `localStorage.removeItem()` and use `localStorage.clear()` instead. You d
 You should remove `localStorage.removeItem("data")`.
 
 ```js
-assert.notMatch(code, /localStorage\.removeItem\(('|")data\1\);/)
+assert.notMatch(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);/)
 ```
 
 You should remove everything from the browser `local storage` with `localStorage.clear()`.
 
 ```js
-assert.match(code, /localStorage\.clear\(\);?/)
+assert.match(code, /localStorage\.clear\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
index 801379ccce3..8cf6abf706b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
@@ -14,7 +14,7 @@ Remove the `myTaskArr` array and all of the code for `localStorage` because you
 You should remove `myTaskArr` and all the code related to `localStorage` that you've just learned.
 
 ```js
-assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s"Walk\s*the\s*Dog",\s*date:\s*"22-04-2022"\s*\},\s*\{\s*task:\s"Read\s*some\s*books",\s*date:\s*"02-11-2023"\s*\},\s*\{\s*task:\s"Watch\s*football",\s*date:\s*"10-08-2021"\s*\},\s*\];?\s*localStorage\.setItem\("data", JSON\.stringify\(myTaskArr\)\);\s*localStorage\.clear\(\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\("data"\)\s*console\.log\(getTaskArr\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\("data"\)\);?\s*console\.log\(getTaskArrObj\);?/)
+assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s('|")Walk\s*the\s*Dog\1,\s*date:\s*('|")22-04-2022\2\s*\},\s*\{\s*task:\s('|")Read\s*some\s*books\3,\s*date:\s*('|")02-11-2023\4\s*\},\s*\{\s*task:\s('|")Watch\s*football\5,\s*date:\s*('|")10-08-2021\6\s*\},\s*\]\s*;?\s*localStorage\.setItem\(('|")data\7, JSON\.stringify\(\s*myTaskArr\s*\)\s*\);\s*localStorage\.clear\(\s*\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\8\s*\)\s*console\.log\(\s*getTaskArr\s*\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\9\s*\)\s*\);?\s*console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
@@ -316,7 +316,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -346,7 +346,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
index 7af7737794c..de79ae3bc34 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
@@ -24,13 +24,13 @@ assert.match(code, /localStorage\.setItem\(/)
 You should pass in `"data"` as the first argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
index e5dcb2adbba..24c5ce5889f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
@@ -24,14 +24,14 @@ You should pass in `"data"` as the first argument of your `localStorage.setItem(
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
index 522d8176898..615315700d0 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
@@ -16,7 +16,7 @@ Set `taskData` to the retrieval of `data` from local storage **or** an empty arr
 You should set the `taskData` variable to `JSON.parse(localStorage.getItem("data")) || [];`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\)\s*\|\|\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\)\s*\|\|\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -321,7 +321,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -352,7 +352,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
index def305dd450..fa60efba4bb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
@@ -20,13 +20,13 @@ With that, you've completed this project.
 You should create an `if` statement with `(taskData.length)` as the condition. As a reminder, `0` is a falsy value.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*/)
 ```
 
 You should call the `updateTaskContainer` function in your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*updateTaskContainer\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*updateTaskContainer\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
index 2e444385a9c..a109fd566fd 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
@@ -20,7 +20,7 @@ console.log(Date.now()); // 1628586800000
 You should attach `-${Date.now()}` to the existing value of the `id` key. Don't forget it needs to be inside the template string.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
index ab1defde71c..f21fcdc5ab2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
@@ -1,32 +1,18 @@
 ---
 id: 63e02a333354343b595d64ca
-title: Step 16
+title: Step 15
 challengeType: 0
-dashedName: step-16
+dashedName: step-15
 ---
 
 # --description--
 
-Now that you have tested the `Object.freeze()` method, you can delete those two lines of code from the last lesson.
-
 The next step is to access the key called `sport` from the `myFavoriteFootballTeam` object and assign it to a new `const` variable called `sport`.
 
 Remember you can use dot notation for this.
 
 # --hints--
 
-You should remove your assignment of the `USA` string to `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /myFavoriteFootballTeam\.team\s*=\s*('|"|`)USA\1\s*/);
-```
-
-You should remove your `console.log` for `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /console\.log\(\s*myFavoriteFootballTeam\.team\s*\)/);
-```
-
 You should use `const` to declare a `sport` variable.
 
 ```js
@@ -462,8 +448,6 @@ Object.freeze(myFavoriteFootballTeam);
 
 --fcc-editable-region--
 
-myFavoriteFootballTeam.team = "USA";
-console.log(myFavoriteFootballTeam.team);
 
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
index 9815fa204b9..d9520c64e56 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
@@ -1,8 +1,8 @@
 ---
 id: 63e0334b7a24bd3c96aca4de
-title: Step 17
+title: Step 16
 challengeType: 0
-dashedName: step-17
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
index ce0835fa4d9..e556c5c05e3 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e036373fc9173d284e165a
-title: Step 18
+title: Step 17
 challengeType: 0
-dashedName: step-18
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
index de3439a814b..2a8ea3b0d0b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
@@ -1,8 +1,8 @@
 ---
 id: 63e03b86008bbb3e1c3de846
-title: Step 19
+title: Step 18
 challengeType: 0
-dashedName: step-19
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
index dff305f1421..32ae955337d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
@@ -1,8 +1,8 @@
 ---
 id: 63e042661ad2663f0d468740
-title: Step 20
+title: Step 19
 challengeType: 0
-dashedName: step-20
+dashedName: step-19
 ---
 
 # --description--
@@ -15,7 +15,7 @@ Use object destructuring to access the `coachName` value.
 
 ```js
 
-assert.match(code, /const\s*{\s*coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach\s*/)
+assert.match(code, /const\s*{\s*(coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach|headCoach\s*:\s*{\s*coachName\s*}\s*}\s*=\s*myFavoriteFootballTeam)\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
index 6492de91468..ed536a4b70e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
@@ -1,8 +1,8 @@
 ---
 id: 63e050bf935ac341b88326d6
-title: Step 21
+title: Step 20
 challengeType: 0
-dashedName: step-21
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
index 891f824c094..3562608e3f9 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05557016dfd45ea49152c
-title: Step 22
+title: Step 21
 challengeType: 0
-dashedName: step-22
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
index d0fc0087e4f..70772e4cba9 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05c00b615bb46ac87273a
-title: Step 23
+title: Step 22
 challengeType: 0
-dashedName: step-23
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
index e739b69e4eb..862d6c0fd77 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
@@ -1,8 +1,8 @@
 ---
 id: 63e060df21bca347b2d2b374
-title: Step 24
+title: Step 23
 challengeType: 0
-dashedName: step-24
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
index 21815bb6d72..5ea194d88aa 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e062d6090ebb486a4eda3a
-title: Step 25
+title: Step 24
 challengeType: 0
-dashedName: step-25
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
index 25738ac3891..5cd7ea1d6e4 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
@@ -1,8 +1,8 @@
 ---
 id: 63e949b8327aa2aca2ca8eac
-title: Step 26
+title: Step 25
 challengeType: 0
-dashedName: step-26
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
index a0df3a57851..b13000896fc 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
@@ -1,8 +1,8 @@
 ---
 id: 63e94dae6dcedbad73f2f6ee
-title: Step 27
+title: Step 26
 challengeType: 0
-dashedName: step-27
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
index 515a4f73094..dbeb80c7a4c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
@@ -1,8 +1,8 @@
 ---
 id: 63e954321b0a77ae4f6d9650
-title: Step 28
+title: Step 27
 challengeType: 0
-dashedName: step-28
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
index 5c86e0db8cd..3912e0e6228 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95a45dce95baf41dd4f78
-title: Step 29
+title: Step 28
 challengeType: 0
-dashedName: step-29
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
index de5336ad418..9a21ae45f28 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95e39860dc5b01ebe9be0
-title: Step 30
+title: Step 29
 challengeType: 0
-dashedName: step-30
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
index d7438544c14..e037852b3bc 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9667c881b61b1e338d276
-title: Step 31
+title: Step 30
 challengeType: 0
-dashedName: step-31
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
index 2fea3779eef..20e68b6415e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96938d2a347b2734a1587
-title: Step 32
+title: Step 31
 challengeType: 0
-dashedName: step-32
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
index 2c57e9d7099..eb225b3116c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96eb94c97b6b31ee50f63
-title: Step 33
+title: Step 32
 challengeType: 0
-dashedName: step-33
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
index 1839e419c0a..401f8fcb289 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9718d7d490bb3940d5a0a
-title: Step 34
+title: Step 33
 challengeType: 0
-dashedName: step-34
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
index f4cd18c7b8c..e2cf0d8bbea 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9737f686c76b4078a60f4
-title: Step 35
+title: Step 34
 challengeType: 0
-dashedName: step-35
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
index 678ee296d3a..0544b4bdd11 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28972973504e7bb58b0b3
-title: Step 36
+title: Step 35
 challengeType: 0
-dashedName: step-36
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
index 64a5a9901df..91426574c6f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28ef082d771e8bf71f94a
-title: Step 37
+title: Step 36
 challengeType: 0
-dashedName: step-37
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
index c9af9a4428b..9ad6aab3caa 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
@@ -1,8 +1,8 @@
 ---
 id: 63f293c804d6f9e9a83ca4c5
-title: Step 38
+title: Step 37
 challengeType: 0
-dashedName: step-38
+dashedName: step-37
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Open the console, and make a selection from the teammates dropdown menu. You sho
 You should add a `console.log` with the value of `e.target.value`.
 
 ```js
-assert.match(code, /console\.log\s*\(e\.target\.value\)\s*/)
+assert.match(code, /console\.log\s*\(\s*e\.target\.value\s*\)\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
index a6a4862c966..f95cf6e5d4b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29804e3ec00ea6fab1ec4
-title: Step 39
+title: Step 38
 challengeType: 0
-dashedName: step-39
+dashedName: step-38
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Inside the callback function, access the `innerHTML` property of the `playerCard
 You should not have the `console.log` statement in your code.
 
 ```js
-assert.notMatch(code, /\s*console\.log\(e\.target\.value\)/);
+assert.notMatch(code, /\s*console\.log\(\s*e\.target\.value\s*\)/);
 ```
 
 You should access the `innerHTML` property of the `playerCards` element.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
index 7aa30833269..134d1331364 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29ce62aea65eb041758c8
-title: Step 40
+title: Step 39
 challengeType: 0
-dashedName: step-40
+dashedName: step-39
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /switch\s*\(\s*e\.target\.value\s*\)/);
 Your `switch` statement should be empty.
 
 ```js
-assert.match(code, /\s*switch\s*\(e\.target\.value\)\s*{\s*}/);
+assert.match(code, /\s*switch\s*\(\s*e\.target\.value\s*\)\s*{\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
index 6e7718b4781..a3caf074b5c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a0a860790eebe61bf908
-title: Step 41
+title: Step 40
 challengeType: 0
-dashedName: step-41
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
index 83ef8c9d0c7..303dace84dc 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a4a8087e6dec8ec47f16
-title: Step 44
+title: Step 43
 challengeType: 0
-dashedName: step-44
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
index 296c2c82567..b66de0298ec 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a5f09a785aed155c0a56
-title: Step 45
+title: Step 44
 challengeType: 0
-dashedName: step-45
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
index 5fcf0cee36e..f6cb13c7bc5 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a8e14fb388edd3242527
-title: Step 46
+title: Step 45
 challengeType: 0
-dashedName: step-46
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
index c799c94a69c..3ff1f2396c8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2aa36fcdc63ee4e18fc37
-title: Step 47
+title: Step 46
 challengeType: 0
-dashedName: step-47
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
index 6393c4866a3..0543e8d3b98 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2ab4f6c52c5eec6d68de4
-title: Step 48
+title: Step 47
 challengeType: 0
-dashedName: step-48
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
index f50d4286d0f..6cd48c0e9a8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
@@ -1,8 +1,8 @@
 ---
 id: 641fc88d8fa7127f76e0324f
-title: Step 42
+title: Step 41
 challengeType: 0
-dashedName: step-42
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
index 891647d2611..11c8298ac82 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
@@ -1,8 +1,8 @@
 ---
 id: 641fcfd468185384ac218b7d
-title: Step 43
+title: Step 42
 challengeType: 0
-dashedName: step-43
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
index bc89e649597..14318219ed9 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-After alerting the user if the number input is empty of the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
+After alerting the user if the number input is empty or the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
 
 Add the `return` keyword after `alert()`.
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
index 397e7ccb4b5..e327a6d184c 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
@@ -24,7 +24,6 @@ Use the `.reverse()` method to reverse the order of the `remainders` array, and
 You should use the `.reverse()` method on the `remainders` array.
 
 ```js
-console.log(String(decimalToBinary))
 assert.match(String(decimalToBinary), /remainders\.reverse\(\s*\)/);
 ```
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
index 4d44fef8620..00de9f3019e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
@@ -31,7 +31,7 @@ assert.notMatch(String(decimalToBinary), /else\s+if\s*\([\s\S]+\)/);
 Your `decimalToBinary()` function should have an `if` statement that checks if `input` is equal to `0` or `1`.
 
 ```js
-assert.match(String(decimalToBinary), /if\s*\(input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
+assert.match(String(decimalToBinary), /if\s*\(\s*input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(\s*input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
 ```
 
 If input is equal to `0` or `1`, your `decimalToBinary()` function should return `String(input)`.
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
index 58884729f95..a85fa8f2db2 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
@@ -44,7 +44,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1000` as the second argument to the `setTimeout` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
index cc389b3ed8b..5571a9a228f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
@@ -48,7 +48,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
index 6bda7d78ee0..718c67ca0a3 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
@@ -46,7 +46,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
index 5063e0e6486..a8028bd8c6e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the `id` attribute to the `inputVal`
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
index 5d437a7285e..7ac96234522 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the text of the paragraph element to
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
index a3029977f81..c541a3dad9f 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `showMsgDelay` property of the c
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)showMsgDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)showMsgDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
index 87a051d3624..94af493ee3b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
@@ -18,7 +18,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
index 8a786c43df0..4290633ce17 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
@@ -27,7 +27,7 @@ You should set the `textContent` property of the targeted element equal to the `
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\[\s*('|"|`)\s*msg\s*\1\s*\]/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\s*\[\s*('|"|`)\s*msg\s*\1\s*\]/
 );
 ```
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
index 7dcdefa9b9b..bfed7fd12dd 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `removeElDelay` property of the
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)removeElDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)removeElDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
index 2ea647b26d7..0f1aa7f31c8 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
@@ -16,7 +16,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.lengthOf(
   String(showAnimation).match(
-    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
+    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
   ),
   2
 );
@@ -27,7 +27,7 @@ You should chain the `.remove()` method to the `.getElementById()` method.
 ```js
 assert.match(
   String(showAnimation),
-  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
+  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
 );
 ```
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
index 94877f62dd1..11a148029df 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
@@ -18,7 +18,7 @@ You should set the `textContent` property of `result` equal to calling `decimalT
 ```js
 assert.match(
   String(showAnimation),
-  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\[('|"|`)textContent\1\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
+  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\s*\[\s*('|"|`)textContent\1\s*\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
 );
 ```
 
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
index 269cc030d8f..955ecf22396 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
@@ -9,9 +9,9 @@ dashedName: step-5
 
 Back in your event listener, you need to update the text of the `result` element.
 
-Use a ternary operator to update the text of the `result` element after the `if` statement. Check the truthiness of calling `isSpam()` on the value of the `messageInput` element. If true, set the text to `Oh no! This looks like a spam message.`. Otherwise, set the text to `This message does not seem to contain any spam.`
+After the `if` statement, use a ternary operator to check the truthiness of calling `isSpam()` with `messageInput.value` as the argument. If true, set the `textContent` property on the `result` element to `Oh no! This looks like a spam message.`. Otherwise, set it to `This message does not seem to contain any spam.`
 
-Then set the `messageInput` element's value to an empty string.
+Then set the `messageInput` element's `value` property to an empty string.
 
 # --hints--
 
@@ -21,10 +21,10 @@ You should use the assignment operator to set the `textContent` property of the
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*/)
 ```
 
-You should assign the `isSpam()` function call to `result.textContent`.
+You should call the `isSpam()` function after the assignment operator `=` and before the `?` ternary operator.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(.*\)\s*\?/)
 ```
 
 You should use ternary syntax to check the truthiness of `isSpam(messageInput.value)`.
@@ -45,10 +45,10 @@ The falsy expression of your ternary should set the `textContent` property of th
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*/);
 ```
 
-After your ternary, set the `value` of `messageInput` to an empty string.
+After your ternary, set the `value` property on the `messageInput` element to an empty string.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5\s*;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
index c8bedf3010f..c1a537dc223 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
@@ -24,13 +24,13 @@ assert.match(code, /const\s+currentDateParagraph\s+=/);
 You should use `document.getElementById()` to get the `#current-date` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)current-date\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)current-date\1\s*\)/);
 ```
 
 You should assign the `#current-date` element to your `currentDateParagraph` variable.
 
 ```js
-assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(('|"|`)current-date\1\)/g));
+assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(\s*('|"|`)current-date\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
index 3295a750daa..47c15587f56 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+dateOptionsSelectElement\s+=/);
 You should use `document.getElementById()` to get the `#date-options` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)date-options\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)date-options\1\s*\)/);
 ```
 
 You should assign the `#date-options` element to your `dateOptionsSelectElement` variable.
 
 ```js
-assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(('|"|`)date-options\1\)/g));
+assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(\s*('|"|`)date-options\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
index 788fae024c1..7a064099cb4 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
@@ -32,7 +32,7 @@ assert.match(code, /const\s+date\s+=/);
 You should assign a `Date` object to your `date` variable with `new Date()`.
 
 ```js
-assert(code.match(/const\s+date\s+=\s+new\s+Date\(\)/g));
+assert(code.match(/const\s+date\s+=\s+new\s+Date\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
index 4fa72cc6a02..9e8da0034f4 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
@@ -30,7 +30,7 @@ assert.match(code, /const\s+day\s+=/);
 You should assign the `date.getDate()` to your `day` variable.
 
 ```js
-assert(code.match(/const\s+day\s+=\s+date\.getDate\(\)/g));
+assert(code.match(/const\s+day\s+=\s+date\.getDate\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
index 856addb1fea..f29a6c67f7a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+month\s+=/);
 You should assign the `date.getMonth() + 1` to your `month` variable.
 
 ```js
-assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\)\s*\+\s*1/g));
+assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\s*\)\s*\+\s*1/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
index 36542963348..b2d4d8ec05a 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+year\s+=/);
 You should assign the `date.getFullYear()` to your `year` variable.
 
 ```js
-assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\)/g));
+assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
index b43a24cadcf..ee5b17ed5f6 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+hours\s+=/);
 You should assign the `date.getHours()` to your `hours` variable.
 
 ```js
-assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\)/g));
+assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
index a48315193cd..5bdd824a5bb 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+minutes\s+=/);
 You should assign the `date.getMinutes()` to your `minutes` variable.
 
 ```js
-assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\)/g));
+assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
index b2eaac290cd..d8a57108d7e 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
@@ -16,7 +16,7 @@ Open up the console and you should see the date printed out.
 You should have a `console.log(formattedDate)` line in your code.
 
 ```js
-assert.match(code, /console\.log\(formattedDate\)/);
+assert.match(code, /console\.log\(\s*formattedDate\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
index 3ea8c49afc6..c58dd15c858 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
@@ -22,7 +22,7 @@ assert(code.match(/currentDateParagraph\.textContent\s*=\s*formattedDate/g));
 You should not have a `console.log(formattedDate);` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(formattedDate\);/);
+assert.notMatch(code, /console\.log\(\s*formattedDate\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
index dbb258e4069..da96053247d 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
@@ -15,11 +15,17 @@ element.addEventListener("change", () => {
 });
 ```
 
-Chain the `addEventListener` method to `dateOptionsSelectElement` where the first argument is `change` and the second argument is an empty arrow function.
+Attach the `addEventListener` method to the `dateOptionsSelectElement`. The first argument of the event listener should be the string `change` and the second argument should be an empty arrow function.
 
 # --hints--
 
-You should use the `addEventListener` method to add a `change` event listener to `dateOptionsSelectElement`.
+You should attach the `addEventListener` method to the `dateOptionsSelectElement`.
+
+```js
+assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(/g));
+```
+
+Your event listener should listen for a `change` event.
 
 ```js
 assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(\s*('|")change\1/g));
diff --git a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
index 873ad4fd565..5c64acf390b 100644
--- a/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
+++ b/curriculum/challenges/japanese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
@@ -22,7 +22,7 @@ Chain the `.reverse()` method to the end of `.split()` method.
 You should use the `.reverse()` method to reverse the order of the array returned by `.split()`.
 
 ```js
-assert(code.match(/\.reverse\(\)/g));
+assert(code.match(/\.reverse\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/japanese/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-k.md b/curriculum/challenges/japanese/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-k.md
index 17d181cb825..9ea6a1913b4 100644
--- a/curriculum/challenges/japanese/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-k.md
+++ b/curriculum/challenges/japanese/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-k.md
@@ -19,7 +19,7 @@ Because `justify-content` and `align-items` are based on the main and cross axis
 
 # --question--
 
-## --宿題--
+## --assignment--
 
 Before moving on to the next lesson, see if you can figure out how `align-items` behaves when you change the `flex-direction` property to `column`.
 
diff --git a/curriculum/challenges/japanese/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-b.md b/curriculum/challenges/japanese/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-b.md
index 8468c48680d..5db2fee526d 100644
--- a/curriculum/challenges/japanese/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-b.md
+++ b/curriculum/challenges/japanese/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-b.md
@@ -11,7 +11,7 @@ Inline elements, however, do not start on a new line. They appear in line with w
 
 # --question--
 
-## --宿題--
+## --assignment--
 
 Search the web for a list of `block` elements and a list of `inline` elements.
 
diff --git a/curriculum/challenges/japanese/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md b/curriculum/challenges/japanese/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
index a721563d96d..1f1a60542e3 100644
--- a/curriculum/challenges/japanese/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
+++ b/curriculum/challenges/japanese/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
@@ -109,7 +109,6 @@ assert(getCorrectStyle()?.textAlign === 'center');
 # --seed--
 
 ## --seed-contents--
-
 ```css
 ```
 
diff --git a/curriculum/challenges/japanese/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md b/curriculum/challenges/japanese/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
index 6480354b9f3..cf7e94d0967 100644
--- a/curriculum/challenges/japanese/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
+++ b/curriculum/challenges/japanese/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
@@ -29,4 +29,4 @@ They are outdated technologies.
 
 ## --video-solution--
 
-1
+2
diff --git a/curriculum/challenges/japanese/18-project-euler/project-euler-problems-1-to-100/problem-1-multiples-of-3-or-5.md b/curriculum/challenges/japanese/18-project-euler/project-euler-problems-1-to-100/problem-1-multiples-of-3-or-5.md
index 45e2c6dfe3d..e23fedf7be8 100644
--- a/curriculum/challenges/japanese/18-project-euler/project-euler-problems-1-to-100/problem-1-multiples-of-3-or-5.md
+++ b/curriculum/challenges/japanese/18-project-euler/project-euler-problems-1-to-100/problem-1-multiples-of-3-or-5.md
@@ -1,6 +1,6 @@
 ---
 id: 5900f36e1000cf542c50fe80
-title: 'Problem 1: Multiples of 3 or 5'
+title: '問題 1: 3 または 5 の倍数'
 challengeType: 1
 forumTopicId: 301722
 dashedName: problem-1-multiples-of-3-or-5
@@ -14,31 +14,31 @@ dashedName: problem-1-multiples-of-3-or-5
 
 # --hints--
 
-`multiplesOf3Or5(10)` should return a number.
+`multiplesOf3Or5(10)` は数値を返す必要があります。
 
 ```js
 assert(typeof multiplesOf3Or5(10) === 'number');
 ```
 
-`multiplesOf3Or5(49)` should return 543.
+`multiplesOf3Or5(49)` は 543 を返す必要があります。
 
 ```js
 assert.strictEqual(multiplesOf3Or5(49), 543);
 ```
 
-`multiplesOf3Or5(1000)` should return 233168.
+`multiplesOf3Or5(1000)` は 233168 を返す必要があります。
 
 ```js
 assert.strictEqual(multiplesOf3Or5(1000), 233168);
 ```
 
-`multiplesOf3Or5(8456)` should return 16687353.
+`multiplesOf3Or5(8456)` は 16687353 を返す必要があります。
 
 ```js
 assert.strictEqual(multiplesOf3Or5(8456), 16687353);
 ```
 
-`multiplesOf3Or5(19564)` should return 89301183.
+`multiplesOf3Or5(19564)` は 89301183 を返す必要があります。
 
 ```js
 assert.strictEqual(multiplesOf3Or5(19564), 89301183);
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/add-looping-logic-to-your-code-using-the-do-while-and-while-statements-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/add-looping-logic-to-your-code-using-the-do-while-and-while-statements-in-c-sharp.md
index d5de7121c15..fb63e7c580e 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/add-looping-logic-to-your-code-using-the-do-while-and-while-statements-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/add-looping-logic-to-your-code-using-the-do-while-and-while-statements-in-c-sharp.md
@@ -1,26 +1,26 @@
 ---
 id: 647e1f4e8acb466c97ccbedf
-title: 'Add Looping Logic to Your Code Using the do-while and while Statements in C#'
+title: 'C# で do-while ステートメントと while ステートメントを使用して、ループ ロジックをコードに追加する'
 challengeType: 19
 dashedName: add-looping-logic-to-your-code-using-the-do-while-and-while-statements-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-do-while/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-do-while/</a> and complete all the tasks for the "Add Looping Logic to Your Code Using the do-while and while Statements in C#" module. This is **required** to earn the "Add Logic to C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-do-while/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-do-while/</a> へ移動し、「C# で do-while ステートメントと while ステートメントを使用して、ループ ロジックをコードに追加する (Add Looping Logic to Your Code Using the do-while and while Statements in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションにロジックを追加する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-do-while/" target="_blank" rel="noreferrer">Add Looping Logic to Your Code Using the `do`-`while` and `while` Statements in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-do-while/" target="_blank" rel="noreferrer">C# で `do`-`while` ステートメントと `while` ステートメントを使用して、ループ ロジックをコードに追加する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-A developer needs to iterate through an array of items to find one that matches a certain criteria. Which is the best iteration statement for this purpose?
+ある開発者が、配列内の項目を反復処理して、特定の条件に一致する項目を見つける必要があるとします。 この目的に最適な反復ステートメントはどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/branch-the-flow-of-code-using-the-switch-case-construct-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/branch-the-flow-of-code-using-the-switch-case-construct-in-c-sharp.md
index ee50cb1473b..f5987acdecd 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/branch-the-flow-of-code-using-the-switch-case-construct-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/branch-the-flow-of-code-using-the-switch-case-construct-in-c-sharp.md
@@ -1,38 +1,38 @@
 ---
 id: 647e214b8acb466c97ccbee0
-title: 'Branch the Flow of Code Using the switch-case Construct in C#'
+title: 'C# での switch-case コンストラクトを使用したコード フローの分岐'
 challengeType: 19
 dashedName: branch-the-flow-of-code-using-the-switch-case-construct-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-switch-case/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-switch-case/</a> and complete all the tasks for the "Branch the Flow of Code Using the switch-case Construct in C#" module. This is **required** to earn the "Add Logic to C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-switch-case/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-switch-case/</a> へ移動し、「C# での switch-case コンストラクトを使用したコード フローの分岐 (Branch the Flow of Code Using the switch-case Construct in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションにロジックを追加する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-switch-case/" target="_blank" rel="noreferrer">Branch the Flow of Code Using the `switch`-`case` Construct in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-switch-case/" target="_blank" rel="noreferrer">C# での `switch`-`case` コンストラクトを使用したコード フローの分岐</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-What is the purpose of the `break` keyword?
+`break` キーワードの用途は何ですか？
 
 ## --answers--
 
-The `break` keyword tells the runtime to continue evaluating other cases in the `switch` construct.
+`break` キーワードにより、ランタイムに `switch` 文の他のケースの評価を続けるよう指示します。
 
 ---
 
-The `break` keyword tells the runtime to stop evaluating other cases in the `switch` construct.
+`break` キーワードにより、ランタイムに `switch` 文の他のケースの評価を停止するよう指示します。
 
 ---
 
-The `break` keyword tells the runtime to exit the application.
+`break` キーワードにより、ランタイムにアプリケーションを終了するよう指示します。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md
index a837a683f26..ad777d42808 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md
@@ -1,38 +1,38 @@
 ---
 id: 647e21598acb466c97ccbee1
-title: 'Challenge Project - Develop Branching and Looping Structures in C#'
+title: 'チャレンジ プロジェクト - C# で配列データを処理するための foreach および if-elseif-else 構造を開発する'
 challengeType: 19
 dashedName: challenge-project-develop-branching-and-looping-structures-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/</a> and complete all the tasks for the "Challenge Project - Develop Branching and Looping Structures in C#" module. This is **required** to earn the "Add Logic to C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/</a> へ移動し、「チャレンジ プロジェクト - C# で配列データを処理するための foreach および if-elseif-else 構造を開発する (Challenge Project - Develop foreach and if-elseif-else Structures to Process Array Data in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションにロジックを追加する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/" target="_blank" rel="noreferrer">Develop Branching and Looping Structures in C#</a> challenge project on Microsoft Learn. Then, answer the question below.
+Microsoft Learn でチャレンジプロジェクト「<a href="https://learn.microsoft.com/training/modules/challenge-project-develop-branching-looping-structures-c-sharp/" target="_blank" rel="noreferrer">C# で配列データを処理するための foreach および if-elseif-else 構造を開発する</a>」を完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-A developer needs to create an iteration statement. Under what condition is a `while` statement a better choice than a `do` statement?
+ある開発者が、反復ステートメントを作成する必要があるとします。 `do` ステートメントより `while` ステートメントを使う方が良いとされるのは、どのような場合ですか？
 
 ## --answers--
 
-When the expression values evaluated by the iteration statement are unknown prior to the iteration code block.
+反復ステートメントで評価される式の値が、反復コードブロックより前には分からない場合。
 
 ---
 
-When the expression values evaluated by the iteration statement are known prior to the iteration code block.
+反復ステートメントで評価される式の値が、反復コードブロックより前に分かっている場合。
 
 ---
 
-When the developer creates nested `do` or `while` loops.
+開発者が、ネストされた `do` または `while` ループを作成する場合。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/control-variable-scope-and-logic-using-code-blocks-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/control-variable-scope-and-logic-using-code-blocks-in-c-sharp.md
index 68fae6e49b2..34013e13832 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/control-variable-scope-and-logic-using-code-blocks-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/control-variable-scope-and-logic-using-code-blocks-in-c-sharp.md
@@ -1,38 +1,38 @@
 ---
 id: 647e21658acb466c97ccbee2
-title: 'Control Variable Scope and Logic Using Code Blocks in C#'
+title: 'C# でコード ブロックを使用して変数のスコープとロジックを制御する'
 challengeType: 19
 dashedName: control-variable-scope-and-logic-using-code-blocks-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-code-blocks/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-code-blocks/</a> and complete all the tasks for the "Control Variable Scope and Logic Using Code Blocks in C#" module. This is **required** to earn the "Add Logic to C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-code-blocks/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-code-blocks/</a> へ移動し、「C# でコード ブロックを使用して変数のスコープとロジックを制御する (Control Variable Scope and Logic Using Code Blocks in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションにロジックを追加する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-code-blocks/" target="_blank" rel="noreferrer">Control Variable Scope and Logic Using Code Blocks in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-code-blocks/" target="_blank" rel="noreferrer">C# でコード ブロックを使用して変数のスコープとロジックを制御する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which of the following statements is true about showing/removing the curly braces for code blocks associated with an `if` statement?
+`if` ステートメントと関連付けられたコードブロックの中括弧の追加または削除について、正しい文は次のうちどれですか？
 
 ## --answers--
 
-The curly braces can't be removed from the code block for `else if` and `else` statements.
+`else if` および `else` ステートメントのコードブロックから中括弧を削除することはできない。
 
 ---
 
-If the curly braces are removed from the code blocks of an `if-elseif-else`, the white space must also be removed.
+`if-elseif-else` のコードブロックから中括弧を削除する場合、スペースも削除しなければならない。
 
 ---
 
-Always choose a style that improves readability.
+常に、読みやすさを向上させるスタイルを選択する。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md
index f1d60edd59a..53556f909fa 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md
@@ -1,26 +1,26 @@
 ---
 id: 647e21708acb466c97ccbee3
-title: 'Evaluate Boolean Expressions to Make Decisions in C#'
+title: 'C# でブール式を評価して決定を行う'
 challengeType: 19
 dashedName: evaluate-boolean-expressions-to-make-decisions-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/</a> and complete all the tasks for the "Evaluate Boolean Expressions to Make Decisions in C#" module. This is **required** to earn the "Add Logic to C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/</a> へ移動し、「C# でブール式を評価して決定を行う (Evaluate Boolean Expressions to Make Decisions in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションにロジックを追加する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/" target="_blank" rel="noreferrer">Evaluate Boolean Expressions to Make Decisions in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-evaluate-boolean-expressions/" target="_blank" rel="noreferrer">C# でブール式を評価して決定を行う</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which of the following lines of code is a valid use of the conditional operator?
+次のうち、条件演算子の有効な使い方はどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/guided-project-develop-conditional-branching-and-looping-structures-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/guided-project-develop-conditional-branching-and-looping-structures-in-c-sharp.md
index a678783a004..acf9a909852 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/guided-project-develop-conditional-branching-and-looping-structures-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/guided-project-develop-conditional-branching-and-looping-structures-in-c-sharp.md
@@ -1,38 +1,38 @@
 ---
 id: 647e217e8acb466c97ccbee4
-title: 'Guided Project - Develop Conditional Branching and Looping Structures in C#'
+title: 'ガイド付きプロジェクト - C# で条件付き分岐とループ構造を開発する'
 challengeType: 19
 dashedName: guided-project-develop-conditional-branching-and-looping-structures-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/guided-project-develop-conditional-branching-looping/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-develop-conditional-branching-looping/</a> and complete all the tasks for the "Guided Project - Develop Conditional Branching and Looping Structures in C#" module. This is **required** to earn the "Add Logic to C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/guided-project-develop-conditional-branching-looping/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-develop-conditional-branching-looping/</a> へ移動し、「ガイド付きプロジェクト - C# で条件付き分岐とループ構造を開発する (Guided Project - Develop Conditional Branching and Looping Structures in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションにロジックを追加する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/guided-project-develop-conditional-branching-looping/" target="_blank" rel="noreferrer">Develop Conditional Branching and Looping Structures in C#</a> guided project on Microsoft Learn. Then, answer the question below.
+Microsoft Learn でガイド付きプロジェクト「<a href="https://learn.microsoft.com/training/modules/guided-project-develop-conditional-branching-looping/" target="_blank" rel="noreferrer">C# で条件付き分岐とループ構造を開発する</a>」を完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-When is it appropriate to use a `switch-case` construct rather than a `if-elseif-else` construct?
+`if-elseif-else` 構文より `switch-case` 構文を使う方が適切なのは、どのような場合ですか？
 
 ## --answers--
 
-A `switch-case` construct is appropriate when more than 2-3 `else if` code blocks are required.
+`else if` コードブロックが 2、3 個より多く必要になる場合、`switch-case` 構文が適切である。
 
 ---
 
-A `switch-case` construct is appropriate when the number of `case` patterns is small.
+`case` パターンの数が少ない場合、`switch-case` 構文が適切である。
 
 ---
 
-A `switch-case` construct is appropriate when the selection statement is inside a loop.
+選択ステートメントがループ内にある場合、`switch-case` 構文が適切である。
 
 
 ## --video-solution--
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/iterate-through-a-code-block-using-the-for-statement-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/iterate-through-a-code-block-using-the-for-statement-in-c-sharp.md
index 9380b367bd4..2a32f499ed3 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/iterate-through-a-code-block-using-the-for-statement-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/iterate-through-a-code-block-using-the-for-statement-in-c-sharp.md
@@ -1,26 +1,26 @@
 ---
 id: 647e218f8acb466c97ccbee5
-title: 'Iterate Through a Code Block Using the for Statement in C#'
+title: 'C# での for ステートメントを使用したコード ブロックの反復処理'
 challengeType: 19
 dashedName: iterate-through-a-code-block-using-the-for-statement-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-for/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-for/</a> and complete all the tasks for the "Iterate Through a Code Block Using the for Statement in C#" module. This is **required** to earn the "Add Logic to C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-for/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-for/</a> へ移動し、「C# での for ステートメントを使用したコード ブロックの反復処理 (Iterate Through a Code Block Using the for Statement in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションにロジックを追加する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-for/" target="_blank" rel="noreferrer">Iterate Through a Code Block Using the `for` Statement in C#</a> module on Microsoft Learn. 次に、下記の質問に回答してください。
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-for/" target="_blank" rel="noreferrer">C# での `for` ステートメントを使用したコード ブロックの反復処理</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which of the following `for` statements is correct?
+次のうち、正しい `for` ステートメントはどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/trophy-add-logic-to-c-sharp-console-applications.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/trophy-add-logic-to-c-sharp-console-applications.md
index 31e5799bf8a..7c681807475 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/trophy-add-logic-to-c-sharp-console-applications.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/trophy-add-logic-to-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647f882207d29547b3bee1c0
-title: 'Trophy - Add Logic to C# Console Applications'
+title: 'トロフィー - C# コンソールアプリケーションにロジックを追加する'
 challengeType: 18
 dashedName: trophy-add-logic-to-c-sharp-console-applications
 msTrophyId: learn.wwl.get-started-c-sharp-part-3.trophy
@@ -8,6 +8,6 @@ msTrophyId: learn.wwl.get-started-c-sharp-part-3.trophy
 
 # --description--
 
-Now that you've completed all of the "Add Logic to C# Console Applications" challenges, you should have earned the trophy for it on the Microsoft Learn platform. If you don't see this trophy when viewing <a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">your achievements page</a>, you have not completed all the tasks and your trophy cannot be verified.
+「C# コンソールアプリケーションにロジックを追加する (Add Logic to C# Console Applications)」のチャレンジがすべて完了すると、Microsoft Learn プラットフォームでトロフィーが獲得できます。 該当するトロフィーが<a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">実績ページ</a>に表示されていない場合は、まだすべてのタスクが完了しておらず、トロフィーの確認ができない状態です。
 
-Link your Microsoft username to your freeCodeCamp account and click the "Verify Trophy" button below to complete the challenge. This trophy is **required** to qualify for the certification exam.
+あなたの Microsoft ユーザー名と freeCodeCamp アカウントをリンクした後、このページ下部の「トロフィーを確認」ボタンをクリックしてチャレンジを完了させてください。 このトロフィーは、認定試験の受験資格を得るために**必須**となります。
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/add-decision-logic-to-your-code-using-if-else-and-else-if-statements-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/add-decision-logic-to-your-code-using-if-else-and-else-if-statements-in-c-sharp.md
index b4c34681581..c570b0c5826 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/add-decision-logic-to-your-code-using-if-else-and-else-if-statements-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/add-decision-logic-to-your-code-using-if-else-and-else-if-statements-in-c-sharp.md
@@ -1,26 +1,26 @@
 ---
 id: 647e21ba8acb466c97ccbee6
-title: 'Add Decision Logic to Your Code Using if, else, and else if statements in C#'
+title: 'C# の if、else、else if ステートメントを使って、コードに決定ロジックを追加する'
 challengeType: 19
 dashedName: add-decision-logic-to-your-code-using-if-else-and-else-if-statements-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-if-elseif-else/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-if-elseif-else/</a> and complete all the tasks for the "Add Decision Logic to Your Code Using if, else, and else if statements in C#" module. This is **required** to earn the "Create and Run Simple C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-if-elseif-else/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-if-elseif-else/</a> へ移動し、「C# の if、else、else if ステートメントを使って、コードに決定ロジックを追加する (Add Decision Logic to Your Code Using if, else, and else if statements in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「単純な C# コンソール アプリケーションを作成して実行する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-if-elseif-else/" target="_blank" rel="noreferrer">Add Decision Logic to Your Code Using `if`, `else`, and `else if` Statements in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-if-elseif-else/" target="_blank" rel="noreferrer">C# の `if`、`else`、`else if` ステートメントを使って、コードに決定ロジックを追加する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which of the choices below is not a valid operator in C#?
+次のうち、C# において有効な演算子ではないものはどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/call-methods-from-the-dot-net-class-library-using-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/call-methods-from-the-dot-net-class-library-using-c-sharp.md
index 64ee30462ef..454ea5e325d 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/call-methods-from-the-dot-net-class-library-using-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/call-methods-from-the-dot-net-class-library-using-c-sharp.md
@@ -1,38 +1,38 @@
 ---
 id: 647e21c48acb466c97ccbee7
-title: 'Call Methods From the .NET Class Library Using C#'
+title: 'C# を使用して .NET クラス ライブラリからメソッドを呼び出す'
 challengeType: 19
 dashedName: call-methods-from-the-dot-net-class-library-using-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-call-methods/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-call-methods/</a> and complete all the tasks for the "Call Methods From the .NET Class Library Using C#" module. This is **required** to earn the "Create and Run Simple C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-call-methods/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-call-methods/</a> へ移動し、「C# を使用して .NET クラス ライブラリからメソッドを呼び出す (Call Methods From the .NET Class Library Using C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「単純な C# コンソール アプリケーションを作成して実行する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-call-methods/" target="_blank" rel="noreferrer">Call Methods from the .NET Class Library Using C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-call-methods/" target="_blank" rel="noreferrer">C# を使用して .NET クラス ライブラリからメソッドを呼び出す</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-What is an object?
+オブジェクトとは何ですか？
 
 ## --answers--
 
-A memory address.
+メモリアドレス
 
 ---
 
-A stateless class.
+ステートレスなクラス
 
 ---
 
-An instance of a class.
+クラスのインスタンス
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/challenge-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/challenge-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md
index c19935da753..9ca4cdbfbd5 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/challenge-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/challenge-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md
@@ -1,38 +1,38 @@
 ---
 id: 647e21d08acb466c97ccbee8
-title: 'Challenge Project - Develop foreach and if-elseif-else Structures to Process Array Data in C#'
+title: 'チャレンジ プロジェクト - C# で配列データを処理するための foreach および if-elseif-else 構造を開発する'
 challengeType: 19
 dashedName: challenge-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/challenge-project-arrays-iteration-selection/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-arrays-iteration-selection/</a> and complete all the tasks for the "Challenge Project - Develop foreach and if-elseif-else Structures to Process Array Data in C#" module. This is **required** to earn the "Create and Run Simple C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/challenge-project-arrays-iteration-selection/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-arrays-iteration-selection/</a> へ移動し、「チャレンジ プロジェクト - C# で配列データを処理するための foreach および if-elseif-else 構造を開発する (Challenge Project - Develop foreach and if-elseif-else Structures to Process Array Data in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「単純な C# コンソール アプリケーションを作成して実行する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/challenge-project-arrays-iteration-selection/" target="_blank" rel="noreferrer">Develop `foreach` and `if`-`elseif`-`else` Structures to Process Array Data in C#</a> challenge project on Microsoft Learn. Then, answer the question below.
+Microsoft Learn でチャレンジプロジェクト「<a href="https://learn.microsoft.com/training/modules/challenge-project-arrays-iteration-selection/" target="_blank" rel="noreferrer">C# で配列データを処理するための `foreach` および `if`-`elseif`-`else` 構造を開発する</a>」を完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-A developer is working with two other developers to update a collection of applications. The developers will use code comments during the update process. Which of the following describes an appropriate use of code comments?
+ある開発者が、他 2 人の開発者との共同作業でアプリケーションを更新しています。 開発者達は更新作業中にコードコメントを使用します。 次のうち、コードコメントの使い方として適切なものはどれですか？
 
 ## --answers--
 
-When updates are made, the developers use line and block comments to identify each individual code update.
+更新を行う際、開発者達は行コメントやブロックコメントを使ってコードの個々の変更が識別できるようにする。
 
 ---
 
-When updates are made, the developers leave all existing code comments intact. New comments are added to indicate when old comments no longer apply.
+更新を行う際、開発者達は既存のコードコメントには一切変更を加えない。 古いコメントが適切でなくなった時には、そのことを示す新しいコメントを追加する。
 
 ---
 
-When updates are made, the developers summarize changes using block comments.
+更新を行う際、開発者達はブロックコメントを使用して変更内容を要約する。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/create-readable-code-with-conventions-whitespace-and-comments-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/create-readable-code-with-conventions-whitespace-and-comments-in-c-sharp.md
index 221d8229223..081c1c65d42 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/create-readable-code-with-conventions-whitespace-and-comments-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/create-readable-code-with-conventions-whitespace-and-comments-in-c-sharp.md
@@ -1,38 +1,38 @@
 ---
 id: 647e21df8acb466c97ccbee9
-title: 'Create Readable Code with Conventions, Whitespace, and Comments in C#'
+title: 'C# で規則、空白文字、コメントを使用して読みやすいコードを作成する'
 challengeType: 19
 dashedName: create-readable-code-with-conventions-whitespace-and-comments-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-readable-code/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-readable-code/</a> and complete all the tasks for the "Create Readable Code with Conventions, Whitespace, and Comments in C#" module. This is **required** to earn the "Create and Run Simple C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-readable-code/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-readable-code/</a> へ移動し、「C# で規則、空白文字、コメントを使用して読みやすいコードを作成する (Create Readable Code with Conventions, Whitespace, and Comments in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「単純な C# コンソール アプリケーションを作成して実行する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-readable-code/" target="_blank" rel="noreferrer">Create Readable Code with Conventions, Whitespace, and Comments in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-readable-code/" target="_blank" rel="noreferrer">C# で規則、空白文字、コメントを使用して読みやすいコードを作成する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which of the following is a bad reason to use a code comment?
+次のうち、コメントを使用する理由として良くないものはどれですか？
 
 ## --answers--
 
-To describe the high-level intent of the code.
+コードのハイレベルな意図を説明する。
 
 ---
 
-To temporarily comment out a line of code while evaluating a feature in a different way.
+ある機能の別の方法を試す間、コード行を一時的にコメントアウトする。
 
 ---
 
-To explain how a new C# keyword works.
+C# の新しいキーワードがどのように動作するかを説明する。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/guided-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/guided-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md
index af1892b527b..00635e0fe94 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/guided-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/guided-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md
@@ -1,38 +1,38 @@
 ---
 id: 647e21eb8acb466c97ccbeea
-title: 'Guided Project - Develop foreach and if-elseif-else Structures to Process Array Data in C#'
+title: 'ガイド付きプロジェクト - C# で配列データを処理するための foreach および if-elseif-else 構造を開発する'
 challengeType: 19
 dashedName: guided-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/guided-project-arrays-iteration-selection/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-arrays-iteration-selection/</a> and complete all the tasks for the "Guided Project - Develop foreach and if-elseif-else Structures to Process Array Data in C#" module. This is **required** to earn the "Create and Run Simple C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/guided-project-arrays-iteration-selection/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-arrays-iteration-selection/</a> へ移動し、「ガイド付きプロジェクト - C# で配列データを処理するための foreach および if-elseif-else 構造を開発する (Guided Project - Develop foreach and if-elseif-else Structures to Process Array Data in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「単純な C# コンソール アプリケーションを作成して実行する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/guided-project-arrays-iteration-selection/" target="_blank" rel="noreferrer">Develop `foreach` and `if`-`elseif`-`else` Structures to Process Array Data in C#</a> guided project on Microsoft Learn. Then, answer the question below.
+Microsoft Learn でガイド付きプロジェクト「<a href="https://learn.microsoft.com/training/modules/guided-project-arrays-iteration-selection/" target="_blank" rel="noreferrer">C# で配列データを処理するための `foreach` および `if`-`elseif`-`else` 構造を開発する</a>」を完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-A developer writes an application that uses a `foreach` loop to iterate through an array containing 20 elements. After the application is complete, the developer learns that the array must be updated to include 40 elements. The application needs to examine all 40 array elements. Which of the following items describes the required code update?
+ある開発者が、`foreach` ループを使用して 20 個の要素を持つ配列を反復処理するアプリケーションを開発しています。 アプリケーションが完成した後で、配列を変更して 40 個の要素を持つようにしなければならないことが分かりました。 アプリケーションは配列内の要素 40 個すべてを検査する必要があります。 次のうち、コードに必要となる変更を説明しているのはどれですか？
 
 ## --answers--
 
-Create a second `foreach` loop that iterates through the additional items.
+追加の項目を反復処理する 2 つ目の `foreach` ループを作成する。
 
 ---
 
-No changes are required to the `foreach` loop.
+`foreach` ループには変更は必要ない。
 
 ---
 
-Place the original `foreach` loop inside the code block of a second `foreach` loop that iterates twice.
+元の `foreach` ループを、処理を 2 回繰り返す 2 つ目の `foreach` ループの中に入れる。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/install-and-configure-visual-studio-code.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/install-and-configure-visual-studio-code.md
index 772087d66a9..dbb212b386e 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/install-and-configure-visual-studio-code.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/install-and-configure-visual-studio-code.md
@@ -1,38 +1,38 @@
 ---
 id: 647e21f88acb466c97ccbeeb
-title: Install and Configure Visual Studio Code
+title: Visual Studio Code をインストールして構成する
 challengeType: 19
 dashedName: install-and-configure-visual-studio-code
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/install-configure-visual-studio-code/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/install-configure-visual-studio-code/</a> and complete all the tasks for the "Install and Configure Visual Studio Code" module. This is **required** to earn the "Create and Run Simple C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/install-configure-visual-studio-code/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/install-configure-visual-studio-code/</a> へ移動し、「Visual Studio Code をインストールして構成する (Install and Configure Visual Studio Code)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「単純な C# コンソール アプリケーションを作成して実行する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/install-configure-visual-studio-code/" target="_blank" rel="noreferrer">Install and Configure Visual Studio Code</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/install-configure-visual-studio-code/" target="_blank" rel="noreferrer">Visual Studio Code をインストールして構成する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which of the following choices provides the best description of an Integrated Development Environment (IDE)?
+次のうち、統合開発環境 (IDE) の説明として最も適切なものはどれですか？
 
 ## --answers--
 
-Visual Studio Code is an Integrated Development Environment.
+統合開発環境とは Visual Studio Code のことである。
 
 ---
 
-An Integrated Development Environment is tool that makes it easier to write code.
+統合開発環境は、コードを書きやすくするためのツールである。
 
 ---
 
-An IDE is a suite of tools that supports the full software development lifecycle.
+IDE はソフトウェア開発ライフサイクル全体をサポートする一連のツールである。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/store-and-iterate-through-sequences-of-data-using-arrays-and-the-foreach-statement-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/store-and-iterate-through-sequences-of-data-using-arrays-and-the-foreach-statement-in-c-sharp.md
index 33713c19393..6cf5f0d5409 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/store-and-iterate-through-sequences-of-data-using-arrays-and-the-foreach-statement-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/store-and-iterate-through-sequences-of-data-using-arrays-and-the-foreach-statement-in-c-sharp.md
@@ -1,26 +1,26 @@
 ---
 id: 647e22058acb466c97ccbeec
-title: 'Store and Iterate Through Sequences of Data Using Arrays and the foreach Statement in C#'
+title: 'C# で配列と foreach ステートメントを使用して、データのシーケンスを格納し、反復処理する'
 challengeType: 19
 dashedName: store-and-iterate-through-sequences-of-data-using-arrays-and-the-foreach-statement-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-arrays/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-arrays/</a> and complete all the tasks for the "Store and Iterate Through Sequences of Data Using Arrays and the foreach Statement in C#" module. This is **required** to earn the "Create and Run Simple C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-arrays/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-arrays/</a> へ移動し、「C# で配列と foreach ステートメントを使用して、データのシーケンスを格納し、反復処理する (Store and Iterate Through Sequences of Data Using Arrays and the foreach Statement in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「単純な C# コンソール アプリケーションを作成して実行する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-arrays/" target="_blank" rel="noreferrer">Store and Iterate Through Sequences of Data Using Arrays and the `foreach` Statement in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-arrays/" target="_blank" rel="noreferrer">C# で配列と `foreach` ステートメントを使用して、データのシーケンスを格納し、反復処理する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which of the following foreach statements is syntactically correct?
+次のうち、構文として正しい foreach ステートメントはどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md
index 84642b155e8..91083463af2 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647f87dc07d29547b3bee1bf
-title: 'Trophy - Create and Run Simple C# Console Applications'
+title: 'トロフィー - 単純な C# コンソール アプリケーションを作成して実行する'
 challengeType: 18
 dashedName: trophy-create-and-run-simple-c-sharp-console-applications
 msTrophyId: learn.wwl.get-started-c-sharp-part-2.trophy
@@ -8,6 +8,6 @@ msTrophyId: learn.wwl.get-started-c-sharp-part-2.trophy
 
 # --description--
 
-Now that you've completed all of the "Create and Run Simple C# Console Applications" challenges, you should have earned the trophy for it on the Microsoft Learn platform. If you don't see this trophy when viewing <a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">your achievements page</a>, you have not completed all the tasks and your trophy cannot be verified.
+「単純な C# コンソール アプリケーションを作成して実行する (Create and Run Simple C# Console Applications)」のチャレンジがすべて完了すると、Microsoft Learn プラットフォームでトロフィーが獲得できます。 該当するトロフィーが<a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">実績ページ</a>に表示されていない場合は、まだすべてのタスクが完了しておらず、トロフィーの確認ができない状態です。
 
-Link your Microsoft username to your freeCodeCamp account and click the "Verify Trophy" button below to complete the challenge. This trophy is **required** to qualify for the certification exam.
+あなたの Microsoft ユーザー名と freeCodeCamp アカウントをリンクした後、このページ下部の「トロフィーを確認」ボタンをクリックしてチャレンジを完了させてください。 このトロフィーは、認定試験の受験資格を得るために**必須**となります。
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/challenge-project-create-a-mini-game.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/challenge-project-create-a-mini-game.md
index 18794d3b5af..1fd50769b15 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/challenge-project-create-a-mini-game.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/challenge-project-create-a-mini-game.md
@@ -1,26 +1,26 @@
 ---
 id: 647e22338acb466c97ccbeed
-title: Challenge Project - Create a Mini-Game
+title: チャレンジ プロジェクト - ミニゲームを作成する
 challengeType: 19
 dashedName: challenge-project-create-a-mini-game
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/</a> and complete all the tasks for the "Challenge Project - Create a Mini-Game" module. This is **required** to earn the "Create Methods in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/</a> へ移動し、「チャレンジ プロジェクト - ミニゲームを作成する (Challenge Project - Create a Mini-Game)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションのメソッドを作成する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/" target="_blank" rel="noreferrer">Create a Mini-Game</a> challenge project on Microsoft Learn. Then, answer the question below.
+Microsoft Learn でチャレンジプロジェクト「<a href="https://learn.microsoft.com/training/modules/challenge-project-create-mini-game/" target="_blank" rel="noreferrer">ミニゲームを作成する</a>」を完了させてください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-A developer wants to create a method that returns a value in an array. Which of the following options would be a good choice for a method signature?
+ある開発者が、配列内の値を返すメソッドを作成しようとしています。 次のうち、メソッドシグネチャとして適切なものはどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-that-return-values.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-that-return-values.md
index 01aaf75c313..fa5318c0006 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-that-return-values.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-that-return-values.md
@@ -1,26 +1,26 @@
 ---
 id: 647e223c8acb466c97ccbeee
-title: 'Create C# Methods that Return Values'
+title: '値を返す C# メソッドを作成する'
 challengeType: 19
 dashedName: create-c-sharp-methods-that-return-values
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/create-c-sharp-methods-return-values/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/create-c-sharp-methods-return-values/</a> and complete all the tasks for the "Create C# Methods that Return Values" module. This is **required** to earn the "Create Methods in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/create-c-sharp-methods-return-values/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/create-c-sharp-methods-return-values/</a> へ移動し、「値を返す C# メソッドを作成する (Create C# Methods that Return Values)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションのメソッドを作成する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/create-c-sharp-methods-return-values/" target="_blank" rel="noreferrer">Create C# Methods that Return Values</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で <a href="https://learn.microsoft.com/training/modules/create-c-sharp-methods-return-values/" target="_blank" rel="noreferrer">値を返す C# メソッドを作成する</a> モジュールを完了させてください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which of the following options correctly returns a `string` value?
+次のうち、正しく `string` の値を返すものはどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-with-parameters.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-with-parameters.md
index 44f48d4b8c9..0dc15b12c62 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-with-parameters.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-with-parameters.md
@@ -1,32 +1,32 @@
 ---
 id: 647e224b8acb466c97ccbeef
-title: 'Create C# Methods with Parameters'
+title: 'パラメーターを使用して C# メソッドを作成する'
 challengeType: 19
 dashedName: create-c-sharp-methods-with-parameters
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/create-c-sharp-methods-parameters/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/create-c-sharp-methods-parameters/</a> and complete all the tasks for the "Create C# Methods with Parameters" module. This is **required** to earn the "Create Methods in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/create-c-sharp-methods-parameters/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/create-c-sharp-methods-parameters/</a> へ移動し、「パラメーターを使用して C# メソッドを作成する (Create C# Methods with Parameters)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションのメソッドを作成する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/create-c-sharp-methods-parameters/" target="_blank" rel="noreferrer">Create C# Methods with Parameters</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/create-c-sharp-methods-parameters/" target="_blank" rel="noreferrer">パラメーターを使用して C# メソッドを作成する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Given the method signature,
+次のメソッドシグネチャがあるとします。
 
 ```clike
 void Print(string name, string number = "", bool member = false)
 ```
 
-Which of the following options correctly uses named and optional arguments?
+次のうち、名前付き引数および省略可能な引数を正しく使用しているものはどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/guided-project-plan-a-petting-zoo-visit.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/guided-project-plan-a-petting-zoo-visit.md
index 15877a13f97..67f210f3ac4 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/guided-project-plan-a-petting-zoo-visit.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/guided-project-plan-a-petting-zoo-visit.md
@@ -1,38 +1,38 @@
 ---
 id: 647e225e8acb466c97ccbef0
-title: Guided Project - Plan a Petting Zoo Visit
+title: ガイド付きプロジェクト - ふれあい動物園への訪問を計画する
 challengeType: 19
 dashedName: guided-project-plan-a-petting-zoo-visit
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/guided-project-visit-petting-zoo/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-visit-petting-zoo/</a> and complete all the tasks for the "Guided Project - Plan a Petting Zoo Visit" module. This is **required** to earn the "Create Methods in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/guided-project-visit-petting-zoo/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-visit-petting-zoo/</a> へ移動し、「ガイド付きプロジェクト - ふれあい動物園への訪問を計画する (Guided Project - Plan a Petting Zoo Visit)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションのメソッドを作成する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/guided-project-visit-petting-zoo/" target="_blank" rel="noreferrer">Plan a Petting Zoo Visit</a> guided project on Microsoft Learn. Then, answer the question below.
+Microsoft Learn でガイド付きプロジェクト「<a href="https://learn.microsoft.com/training/modules/guided-project-visit-petting-zoo/" target="_blank" rel="noreferrer">ふれあい動物園への訪問を計画する</a>」を完了させてください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-What is the purpose of defining an optional parameter in a method?
+メソッドに省略可能な引数を定義する目的は何ですか？
 
 ## --answers--
 
-To cause a method to perform a different task.
+メソッドが異なるタスクを実行できるようにするため。
 
 ---
 
-To overload a method.
+メソッドをオーバーロードするため。
 
 ---
 
-To simplify the required parameters when a parameter isn't significant to the result.
+あるパラメーターが結果に対して重要でない場合に、必須パラメーターをシンプルにするため
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/trophy-create-methods-in-c-sharp-console-applications.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/trophy-create-methods-in-c-sharp-console-applications.md
index 850916a4cb2..e5d7bc9926a 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/trophy-create-methods-in-c-sharp-console-applications.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/trophy-create-methods-in-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647f877f07d29547b3bee1be
-title: 'Trophy - Create Methods in C# Console Applications'
+title: 'トロフィー - C# コンソールアプリケーションでメソッドを作成する'
 challengeType: 18
 dashedName: trophy-create-methods-in-c-sharp-console-applications
 msTrophyId: learn.wwl.get-started-c-sharp-part-5.trophy
@@ -8,6 +8,6 @@ msTrophyId: learn.wwl.get-started-c-sharp-part-5.trophy
 
 # --description--
 
-Now that you've completed all of the "Create Methods in C# Console Applications" challenges, you should have earned the trophy for it on the Microsoft Learn platform. If you don't see this trophy when viewing <a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">your achievements page</a>, you have not completed all the tasks and your trophy cannot be verified.
+「C# コンソールアプリケーションでメソッドを作成する (Create Methods in C# Console Applications)」のチャレンジがすべて完了すると、Microsoft Learn プラットフォームでトロフィーが獲得できます。 該当するトロフィーが<a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">実績ページ</a>に表示されていない場合は、まだすべてのタスクが完了しておらず、トロフィーの確認ができない状態です。
 
-Link your Microsoft username to your freeCodeCamp account and click the "Verify Trophy" button below to complete the challenge. This trophy is **required** to qualify for the certification exam.
+あなたの Microsoft ユーザー名と freeCodeCamp アカウントをリンクした後、このページ下部の「トロフィーを確認」ボタンをクリックしてチャレンジを完了させてください。 このトロフィーは、認定試験の受験資格を得るために**必須**となります。
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/write-your-first-c-sharp-method.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/write-your-first-c-sharp-method.md
index 7e6313f4a57..3fd49e3778e 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/write-your-first-c-sharp-method.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/write-your-first-c-sharp-method.md
@@ -1,26 +1,26 @@
 ---
 id: 647e226a8acb466c97ccbef1
-title: 'Write Your First C# Method'
+title: '初めての C# メソッドを記述する'
 challengeType: 19
 dashedName: write-your-first-c-sharp-method
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/write-first-c-sharp-method/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/write-first-c-sharp-method/</a> and complete all the tasks for the "Write Your First C# Method" module. This is **required** to earn the "Create Methods in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/write-first-c-sharp-method/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/write-first-c-sharp-method/</a> へ移動し、「初めての C# メソッドを記述する (Write Your First C# Method)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションのメソッドを作成する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/write-first-c-sharp-method/" target="_blank" rel="noreferrer">Write Your First C# Method</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で <a href="https://learn.microsoft.com/training/modules/write-first-c-sharp-method/" target="_blank" rel="noreferrer">初めての C# メソッドを記述する</a> モジュールを完了させてください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which of the following correctly declares a method?
+次のうち、正しくメソッドを宣言しているものはどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code.md
index afd50edc73e..a3aab5ebddd 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code.md
@@ -1,38 +1,38 @@
 ---
 id: 647e22778acb466c97ccbef2
-title: 'Challenge Project - Debug a C# Console Application Using Visual Studio Code'
+title: 'チャレンジ プロジェクト - Visual Studio Code を使用して C# コンソール アプリケーションをデバッグする'
 challengeType: 19
 dashedName: challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/challenge-project-debug-c-sharp-console-application/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-debug-c-sharp-console-application/</a> and complete all the tasks for the "Challenge Project - Debug a C# Console Application Using Visual Studio Code" module. This is **required** to earn the "Debug C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/challenge-project-debug-c-sharp-console-application/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-debug-c-sharp-console-application/</a> へ移動し、「チャレンジ プロジェクト - Visual Studio Code を使用して C# コンソール アプリケーションをデバッグする (Challenge Project - Debug a C# Console Application Using Visual Studio Code)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションのデバッグ」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/challenge-project-debug-c-sharp-console-application/" target="_blank" rel="noreferrer">Debug a C# Console Application Using Visual Studio Code</a> challenge project on Microsoft Learn. Then, answer the question below.
+Microsoft Learn でチャレンジプロジェクト「<a href="https://learn.microsoft.com/training/modules/challenge-project-debug-c-sharp-console-application/" target="_blank" rel="noreferrer">Visual Studio Code を使用して C# コンソール アプリケーションをデバッグする</a>」を完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which of the following options can be used to set a breakpoint in Visual Studio Code?
+次の選択肢のうち、Visual Studio Code でブレークポイントを設定するのに使える方法はどれですか？
 
 ## --answers--
 
-Left-click in the column to the left of a line number in the code editor.
+コードエディタ―の行番号の左側にある列を左クリックする。
 
 ---
 
-Select Toggle Breakpoint on the Edit menu.
+編集メニューの「ブレークポイントの切り替え」を選択する。
 
 ---
 
-Right-click in the middle of a line of code, and then select Toggle Breakpoint.
+コード行の真ん中を右クリックし、「ブレークポイントの切り替え」を選択する。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/create-and-throw-exceptions-in-c-sharp-console-applications.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/create-and-throw-exceptions-in-c-sharp-console-applications.md
index 82396ebc624..aaede562967 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/create-and-throw-exceptions-in-c-sharp-console-applications.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/create-and-throw-exceptions-in-c-sharp-console-applications.md
@@ -1,38 +1,38 @@
 ---
 id: 647e228a8acb466c97ccbef3
-title: 'Create and Throw Exceptions in C# Console Applications'
+title: 'C# コンソール アプリケーションで例外を作成してスローする'
 challengeType: 19
 dashedName: create-and-throw-exceptions-in-c-sharp-console-applications
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/create-throw-exceptions-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/create-throw-exceptions-c-sharp/</a> and complete all the tasks for the "Create and Throw Exceptions in C# Console Applications" module. This is **required** earn to the "Debug C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/create-throw-exceptions-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/create-throw-exceptions-c-sharp/</a> へ移動し、「C# コンソール アプリケーションで例外を作成してスローする (Create and Throw Exceptions in C# Console Applications)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションのデバッグ」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/create-throw-exceptions-c-sharp/" target="_blank" rel="noreferrer">Create and Throw Exceptions in C# Console Applications</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/create-throw-exceptions-c-sharp/" target="_blank" rel="noreferrer">C# コンソール アプリケーションで例外を作成してスローする</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-When should a method throw an exception?
+メソッドはいつ例外をスローすべきですか？
 
 ## --answers--
 
-A method should throw an exception when the method can complete its intended purpose.
+メソッドは、意図した目的を完了できる場合に例外をスローすべきである。
 
 ---
 
-A method should throw an exception when the method can't complete its intended purpose.
+メソッドは、意図した目的を完了できない場合に例外をスローすべきである。
 
 ---
 
-A method should throw an exception when an exception type matches the intended purpose of the method.
+メソッドは、例外の種類が意図した目的に一致する場合に例外をスローすべきである。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md
index 33d1914183f..96b7afcb16b 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md
@@ -1,38 +1,38 @@
 ---
 id: 647e22958acb466c97ccbef4
-title: 'Guided Project - Debug and Handle Exceptions in a C# Console Application Using Visual Studio Code'
+title: 'ガイド付きプロジェクト - Visual Studio Code を使用した C# コンソール アプリケーションでの例外のデバッグと処理'
 challengeType: 19
 dashedName: guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/</a> and complete all the tasks for the "Guided Project - Debug and Handle Exceptions in a C# Console Application Using Visual Studio Code" module. This is **required** to earn the "Debug C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/</a> へ移動し、「ガイド付きプロジェクト - Visual Studio Code を使用した C# コンソール アプリケーションでの例外のデバッグと処理 (Guided Project - Debug and Handle Exceptions in a C# Console Application Using Visual Studio Code)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションのデバッグ」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/" target="_blank" rel="noreferrer">Debug and Handle Exceptions in a C# Console Application Using Visual Studio Code</a> guided project on Microsoft Learn. Then, answer the question below.
+Microsoft Learn でガイド付きプロジェクト「<a href="https://learn.microsoft.com/training/modules/guided-project-debug-handle-exceptions-c-sharp-console-application/" target="_blank" rel="noreferrer">Visual Studio Code を使用した C# コンソール アプリケーションでの例外のデバッグと処理</a>」を完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-When is an `ArgumentOutOfRangeException` exception thrown?
+`ArgumentOutOfRangeException` 例外は、どのような場合にスローされますか？
 
 ## --answers--
 
-An `ArgumentOutOfRangeException` exception is thrown when an attempt is made to index an array outside the bounds of the array.
+配列の範囲外にインデックスを作成しようとした場合、`ArgumentOutOfRangeException` 例外がスローされる。
 
 ---
 
-An `ArgumentOutOfRangeException` exception is thrown when the value of an argument is outside the allowable range of values as defined by the method.
+引数の値が、メソッドで定義されている値の許容範囲外である場合、`ArgumentOutOfRangeException` 例外がスローされる。
 
 ---
 
-An `ArgumentOutOfRangeException` exception is thrown when an attempt is made to store a value of one type in an array of another type.
+ある型の値を別の型の配列に格納しようとした場合、`ArgumentOutOfRangeException` 例外がスローされる。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-exception-handling-in-c-sharp-console-applications.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-exception-handling-in-c-sharp-console-applications.md
index d77786e00f0..e1fd41a1055 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-exception-handling-in-c-sharp-console-applications.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-exception-handling-in-c-sharp-console-applications.md
@@ -1,38 +1,38 @@
 ---
 id: 647e22a08acb466c97ccbef5
-title: 'Implement Exception Handling in C# Console Applications'
+title: 'C# コンソール アプリケーションで例外処理を実装する'
 challengeType: 19
 dashedName: implement-exception-handling-in-c-sharp-console-applications
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/implement-exception-handling-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/implement-exception-handling-c-sharp/</a> and complete all the tasks for the "Implement Exception Handling in C# Console Applications" module. This is **required** to earn the "Debug C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/implement-exception-handling-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/implement-exception-handling-c-sharp/</a> へ移動し、「C# コンソール アプリケーションで例外処理を実装する (Implement Exception Handling in C# Console Applications)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションのデバッグ」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/implement-exception-handling-c-sharp/" target="_blank" rel="noreferrer">Implement Exception Handling in C# Console Applications</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/implement-exception-handling-c-sharp/" target="_blank" rel="noreferrer">C# コンソール アプリケーションで例外処理を実装する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-When is an `ArrayTypeMismatchException` exception thrown?
+`ArrayTypeMismatchException` 例外は、どのような場合にスローされますか？
 
 ## --answers--
 
-An `ArrayTypeMismatchException` exception is thrown when an attempt is made to store a value of one type in an array of another type.
+ある型の値を別の型の配列に格納しようとした場合、`ArrayTypeMismatchException` 例外がスローされる。
 
 ---
 
-An `ArrayTypeMismatchException` exception is thrown when attempting to access a member on a type whose value is null.
+ある型の値が null のメンバーにアクセスしようとした場合、`ArrayTypeMismatchException` 例外がスローされる。
 
 ---
 
-An `ArrayTypeMismatchException` exception is thrown when an attempt is made to index an array outside the bounds of the array.
+配列の範囲外にインデックスを作成しようとした場合、`ArrayTypeMismatchException` 例外がスローされる。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-the-visual-studio-code-debugging-tools-for-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-the-visual-studio-code-debugging-tools-for-c-sharp.md
index eaf0a57a505..712b2b17ff7 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-the-visual-studio-code-debugging-tools-for-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-the-visual-studio-code-debugging-tools-for-c-sharp.md
@@ -1,38 +1,38 @@
 ---
 id: 647e22b38acb466c97ccbef6
-title: 'Implement the Visual Studio Code Debugging Tools for C#'
+title: 'C# 用の Visual Studio Code デバッグ ツールを実装する'
 challengeType: 19
 dashedName: implement-the-visual-studio-code-debugging-tools-for-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/implement-visual-studio-code-debugging-tools/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/implement-visual-studio-code-debugging-tools/</a> and complete all the tasks for the "Implement the Visual Studio Code Debugging Tools for C#" module. This is **required** to earn the "Debug C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/implement-visual-studio-code-debugging-tools/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/implement-visual-studio-code-debugging-tools/</a> へ移動し、「C# 用の Visual Studio Code デバッグ ツールを実装する (Implement the Visual Studio Code Debugging Tools for C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションのデバッグ」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/implement-visual-studio-code-debugging-tools/" target="_blank" rel="noreferrer">Implement the Visual Studio Code Debugging Tools for C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/implement-visual-studio-code-debugging-tools/" target="_blank" rel="noreferrer">C# 用の Visual Studio Code デバッグ ツールを実装する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which section of the RUN AND DEBUG view is used to track the current point of execution within the running application?
+「実行とデバッグ」ビューのセクションのうち、実行中アプリケーションの現在の実行ポイントを追跡するために使われるものはどれですか？
 
 ## --answers--
 
-The VARIABLES section.
+「変数」セクション
 
 ---
 
-The CALL STACK section.
+「コールスタック」セクション
 
 ---
 
-The WATCH section.
+「ウォッチ式」セクション
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/review-the-principles-of-code-debugging-and-exception-handling.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/review-the-principles-of-code-debugging-and-exception-handling.md
index 66529f25875..6f60d36daaa 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/review-the-principles-of-code-debugging-and-exception-handling.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/review-the-principles-of-code-debugging-and-exception-handling.md
@@ -1,38 +1,38 @@
 ---
 id: 647e22c08acb466c97ccbef7
-title: Review the Principles of Code Debugging and Exception Handling
+title: コード デバッグと例外処理の原則を確認する
 challengeType: 19
 dashedName: review-the-principles-of-code-debugging-and-exception-handling
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/review-principles-code-debugging-exception-handling-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/review-principles-code-debugging-exception-handling-c-sharp/</a> and complete all the tasks for the "Review the Principles of Code Debugging and Exception Handling" module. This is **required** to earn the "Debug C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/review-principles-code-debugging-exception-handling-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/review-principles-code-debugging-exception-handling-c-sharp/</a> へ移動し、「コード デバッグと例外処理の原則を確認する (Review the Principles of Code Debugging and Exception Handling)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションのデバッグ」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/review-principles-code-debugging-exception-handling-c-sharp/" target="_blank" rel="noreferrer">Review the Principles of Code Debugging and Exception Handling</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/review-principles-code-debugging-exception-handling-c-sharp/" target="_blank" rel="noreferrer">コード デバッグと例外処理の原則を確認する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-What is the relationship between the type of exception and the information it contains?
+例外の種類と含まれる情報の間には、どのような関係がありますか？
 
 ## --answers--
 
-The type of exception determines the information it contains.
+例外の種類により、含まれる情報が決まる。
 
 ---
 
-The type of exception and the information it contains are unrelated.
+例外の種類と含まれる情報は関係ない。
 
 ---
 
-The information contained in an exception determines the type of exception.
+例外に含まれる情報により、例外の種類が決まる。
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/trophy-debug-c-sharp-console-applications.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/trophy-debug-c-sharp-console-applications.md
index 261ddfe5c21..b98d531fa85 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/trophy-debug-c-sharp-console-applications.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/trophy-debug-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647f86ff07d29547b3bee1bd
-title: 'Trophy - Debug C# Console Applications'
+title: 'トロフィー - C# コンソールアプリケーションをデバッグする'
 challengeType: 18
 dashedName: trophy-debug-c-sharp-console-applications
 msTrophyId: learn.wwl.get-started-c-sharp-part-6.trophy
@@ -8,6 +8,6 @@ msTrophyId: learn.wwl.get-started-c-sharp-part-6.trophy
 
 # --description--
 
-Now that you've completed all of the "Debug C# Console Applications" challenges, you should have earned the trophy for it on the Microsoft Learn platform. If you don't see this trophy when viewing <a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">your achievements page</a>, you have not completed all the tasks and your trophy cannot be verified.
+「C# コンソールアプリケーションをデバッグする (Debug C# Console Applications)」のチャレンジがすべて完了すると、Microsoft Learn プラットフォームでトロフィーが獲得できます。 該当するトロフィーが<a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">実績ページ</a>に表示されていない場合は、まだすべてのタスクが完了しておらず、トロフィーの確認ができない状態です。
 
-Link your Microsoft username to your freeCodeCamp account and click the "Verify Trophy" button below to complete the challenge. This trophy is **required** to qualify for the certification exam.
+あなたの Microsoft ユーザー名と freeCodeCamp アカウントをリンクした後、このページ下部の「トロフィーを確認」ボタンをクリックしてチャレンジを完了させてください。 このトロフィーは、認定試験の受験資格を得るために**必須**となります。
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/foundational-c-sharp-with-microsoft-certification-exam/foundational-c-sharp-with-microsoft-certification-exam.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/foundational-c-sharp-with-microsoft-certification-exam/foundational-c-sharp-with-microsoft-certification-exam.md
index 268034e01cb..8619fc6b886 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/foundational-c-sharp-with-microsoft-certification-exam/foundational-c-sharp-with-microsoft-certification-exam.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/foundational-c-sharp-with-microsoft-certification-exam/foundational-c-sharp-with-microsoft-certification-exam.md
@@ -1,6 +1,6 @@
 ---
 id: 647e22d18acb466c97ccbef8
-title: 'Foundational C# with Microsoft Certification Exam'
+title: 'Microsoft 連携・基礎 C# 認定試験'
 challengeType: 17
 dashedName: foundational-c-sharp-with-microsoft-certification-exam
 prerequisites:
@@ -26,13 +26,13 @@ prerequisites:
 
 # --description--
 
-Pass this exam to earn your Foundational C# with Microsoft Certification. Before starting the exam, please review the following guidelines:
+認定試験に合格して、Microsoft 連携・基礎 C# 認定証を獲得しましょう。 試験を始める前に、以下のガイドラインを確認してください:
 
-- You must complete the entire exam in one session.
-- Exiting the exam at any point before you are finished, will result in the loss of your progress.
-- There is no time limit, but your total time taken will be recorded.
-- The exam consists of 80 multiple-choice questions.
-- Complete the exam and correctly answer at least 70% of the questions to earn your certification.
+- 試験全体を一度に完了しなければなりません。
+- 完了前に試験を中断した場合、進捗状況は失われます。
+- 時間制限はありませんが、かかった時間の合計は記録されます。
+- 試験は 80 問の多肢選択式問題で構成されています。
+- 認定証を獲得するには、試験を完了し、70% 以上の質問に正解する必要があります。
 
 # --instructions--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/challenge-project-work-with-variable-data-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/challenge-project-work-with-variable-data-in-c-sharp.md
index 3283ae458e5..ee6e20c96e2 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/challenge-project-work-with-variable-data-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/challenge-project-work-with-variable-data-in-c-sharp.md
@@ -1,38 +1,38 @@
 ---
 id: 647e230c8acb466c97ccbef9
-title: 'Challenge Project - Work with Variable Data in C#'
+title: 'チャレンジプロジェクト - C# で変数データを操作する'
 challengeType: 19
 dashedName: challenge-project-work-with-variable-data-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/challenge-project-work-variable-data-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-work-variable-data-c-sharp/</a> and complete all the tasks for the "Challenge Project - Work with Variable Data in C#" module. This is **required** to earn the "Work with Variable Data in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/challenge-project-work-variable-data-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/challenge-project-work-variable-data-c-sharp/</a> へ移動し、「チャレンジプロジェクト - C# で変数データを操作する (Guided Project - Work with Variable Data in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションで変数データを操作する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/challenge-project-work-variable-data-c-sharp/" target="_blank" rel="noreferrer">Work with Variable Data in C#</a> challenge project on Microsoft Learn. Then, answer the question below.
+Microsoft Learn でチャレンジプロジェクト「<a href="https://learn.microsoft.com/training/modules/challenge-project-work-variable-data-c-sharp/" target="_blank" rel="noreferrer">C# で変数データを操作する</a>」を完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-To sort a string array, why is it important to use the `String.Trim()` method on each array element before sorting?
+文字列の配列をソートする際、ソートの前に配列の各要素に `String.Trim()` メソッドを使用することが重要なのはなぜですか？
 
 ## --answers--
 
-Only string arrays with elements trimmed with `String.Trim()` can sort
+要素が `String.Trim()` でトリムされた文字列の配列のみソートが可能だから
 
 ---
 
-`String.Trim()` removes leading white space that would sort before numbers and letters.
+ソートで数字や文字より前に来る先頭の空白が `String.Trim()` で削除されるから
 
 ---
 
-The array sort is noticeably faster using `String.Trim()` on each element.
+`String.Trim()` を各要素に使用することで、配列のソートが著しく高速になるから
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/choose-the-correct-data-type-in-your-c-sharp-code.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/choose-the-correct-data-type-in-your-c-sharp-code.md
index 90ad0c24ddc..8d2b6fd1595 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/choose-the-correct-data-type-in-your-c-sharp-code.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/choose-the-correct-data-type-in-your-c-sharp-code.md
@@ -1,26 +1,26 @@
 ---
 id: 647e23188acb466c97ccbefa
-title: 'Choose the Correct Data Type in Your C# Code'
+title: 'C# コードで正しいデータ型を選択する'
 challengeType: 19
 dashedName: choose-the-correct-data-type-in-your-c-sharp-code
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-choose-data-type/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-choose-data-type/</a> and complete all the tasks for the "Choose the Correct Data Type in Your C# Code" module. This is **required** to earn the "Work with Variable Data in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-choose-data-type/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-choose-data-type/</a> へ移動し、「C# コードで正しいデータ型を選択する (Choose the Correct Data Type in Your C# Code)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションで変数データを操作する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-choose-data-type/" target="_blank" rel="noreferrer">Choose the Correct Data Type in Your C# Code</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-choose-data-type/" target="_blank" rel="noreferrer">C# コードで正しいデータ型を選択する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-A piece of code must store whole numeric values between negative and positive `1,000,000`. Which data type should you choose?
+あるコードで、± `1,000,000` の間にある整数の値を格納しなければならないとします。 どのデータ型を使いますか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/convert-data-types-using-casting-and-conversion-techniques-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/convert-data-types-using-casting-and-conversion-techniques-in-c-sharp.md
index 2f81848ec0c..95c8463d169 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/convert-data-types-using-casting-and-conversion-techniques-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/convert-data-types-using-casting-and-conversion-techniques-in-c-sharp.md
@@ -1,38 +1,38 @@
 ---
 id: 647e23248acb466c97ccbefb
-title: 'Convert Data Types Using Casting and Conversion Techniques in C#'
+title: 'C# のキャストと変換の手法を利用してデータ型を変換する'
 challengeType: 19
 dashedName: convert-data-types-using-casting-and-conversion-techniques-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-convert-cast/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-convert-cast/</a> and complete all the tasks for the "Convert Data Types Using Casting and Conversion Techniques in C#" module. This is **required** to earn the "Work with Variable Data in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-convert-cast/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-convert-cast/</a> へ移動し、「C# のキャストと変換の手法を利用してデータ型を変換する (Convert Data Types Using Casting and Conversion Techniques in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションで変数データを操作する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-convert-cast/" target="_blank" rel="noreferrer">Convert Data Types Using Casting and Conversion Techniques in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-convert-cast/" target="_blank" rel="noreferrer">C# のキャストと変換の手法を利用してデータ型を変換する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-What type of action is being performed when changing a `float` into an `int`?
+`float` を `int` に変換する際、どのタイプのアクションが実行されますか？
 
 ## --answers--
 
-A narrowing conversion.
+縮小変換
 
 ---
 
-A widening conversion.
+拡大変換
 
 ---
 
-An illegal conversion.
+不正な変換
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/format-alphanumeric-data-for-presentation-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/format-alphanumeric-data-for-presentation-in-c-sharp.md
index 4f13971f084..d863dcdb7a4 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/format-alphanumeric-data-for-presentation-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/format-alphanumeric-data-for-presentation-in-c-sharp.md
@@ -1,26 +1,26 @@
 ---
 id: 647e232c8acb466c97ccbefc
-title: 'Format Alphanumeric Data for Presentation in C#'
+title: 'C# で英数字データをプレゼンテーション用に書式設定する'
 challengeType: 19
 dashedName: format-alphanumeric-data-for-presentation-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-format-strings/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-format-strings/</a> and complete all the tasks for the "Format Alphanumeric Data for Presentation in C#" module. This is **required** to earn the "Work with Variable Data in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-format-strings/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-format-strings/</a> へ移動し、「C# で英数字データをプレゼンテーション用に書式設定する (Format Alphanumeric Data for Presentation in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションで変数データを操作する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-format-strings/" target="_blank" rel="noreferrer">Format Alphanumeric Data for Presentation in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-format-strings/" target="_blank" rel="noreferrer">C# で英数字データをプレゼンテーション用に書式設定する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-For the C# code `Console.WriteLine("C110".PadLeft(6, '0'));`, which is the expected output?
+C# のコード `Console.WriteLine("C110".PadLeft(6, '0'));` について、期待される出力はどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/guided-project-work-with-variable-data-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/guided-project-work-with-variable-data-in-c-sharp.md
index d70b33e0034..57931d7fc64 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/guided-project-work-with-variable-data-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/guided-project-work-with-variable-data-in-c-sharp.md
@@ -1,40 +1,40 @@
 ---
 id: 647e23368acb466c97ccbefd
-title: 'Guided Project - Work with Variable Data in C#'
+title: 'ガイド付きプロジェクト - C# で変数データを操作する'
 challengeType: 19
 dashedName: guided-project-work-with-variable-data-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/guided-project-work-variable-data-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-work-variable-data-c-sharp/</a> and complete all the tasks for the "Guided Project - Work with Variable Data in C#" module. This is **required** to earn the "Work with Variable Data in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/guided-project-work-variable-data-c-sharp/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-work-variable-data-c-sharp/</a> へ移動し、「ガイド付きプロジェクト - C# で変数データを操作する (Guided Project - Work with Variable Data in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションで変数データを操作する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/guided-project-work-variable-data-c-sharp/" target="_blank" rel="noreferrer">Work with Variable Data in C#</a> guided project on Microsoft Learn. Then, answer the question below.
+Microsoft Learn でガイド付きプロジェクト「<a href="https://learn.microsoft.com/training/modules/guided-project-work-variable-data-c-sharp/" target="_blank" rel="noreferrer">C# で変数データを操作する</a>」を完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-For the code `decimal.TryParse(numberString, out myConvert))` when the type of `numberString` is a String.
+`numberString` の型が String である場合の `decimal.TryParse(numberString, out myConvert))` というコードについて考えます。
 
-Which best describes the value type for `myConvert` when the `TryParse()` is successful?
+`TryParse()` が成功する時、`myConvert` の値の型の説明として適切なものはどれですか？
 
 ## --answers--
 
-A string representing numeric digits.
+数字を表す文字列
 
 ---
 
-A Boolean value.
+ブール値
 
 ---
 
-A decimal
+decimal 型
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/modify-the-content-of-string-using-built-in-string-data-type-methods-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/modify-the-content-of-string-using-built-in-string-data-type-methods-in-c-sharp.md
index f3193f3dfc2..83c2e4b0380 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/modify-the-content-of-string-using-built-in-string-data-type-methods-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/modify-the-content-of-string-using-built-in-string-data-type-methods-in-c-sharp.md
@@ -1,26 +1,26 @@
 ---
 id: 647e23438acb466c97ccbefe
-title: 'Modify the Content of Strings Using Built-In String Data Type Methods in C#'
+title: 'C# で組み込みの文字列データ型メソッドを使用して、文字列の内容を変更する'
 challengeType: 19
 dashedName: modify-the-content-of-string-using-built-in-string-data-type-methods-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-modify-content/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-modify-content/</a> and complete all the tasks for the "Modify the Content of Strings Using Built-In String Data Type Methods in C#" module. This is **required** to earn the "Work with Variable Data in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-modify-content/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-modify-content/</a> へ移動し、「C# で組み込みの文字列データ型メソッドを使用して、文字列の内容を変更する (Modify the Content of Strings Using Built-In String Data Type Methods in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションで変数データを操作する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-modify-content/" target="_blank" rel="noreferrer">Modify the Content of Strings Using Built-In String Data Type Methods in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-modify-content/" target="_blank" rel="noreferrer">C# で組み込みの文字列データ型メソッドを使用して、文字列の内容を変更する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which method finds the next index of either the `-` char, the `=` char, or the `_` char?
+`-`、`=`、または `_` いずれかの文字が次に現れるインデックスを見つけるメソッドはどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/perform-operations-on-arrays-using-helpers-methods-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/perform-operations-on-arrays-using-helpers-methods-in-c-sharp.md
index 14353de4a63..c10b6afe78d 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/perform-operations-on-arrays-using-helpers-methods-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/perform-operations-on-arrays-using-helpers-methods-in-c-sharp.md
@@ -1,26 +1,26 @@
 ---
 id: 647e23508acb466c97ccbeff
-title: 'Perform Operations on Arrays Using Helper Methods in C#'
+title: 'C# でヘルパー メソッドを使用して配列の操作を実行する'
 challengeType: 19
 dashedName: perform-operations-on-arrays-using-helpers-methods-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-arrays-operations/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-arrays-operations/</a> and complete all the tasks for the "Perform Operations on Arrays Using Helper Methods in C#" module. This is **required** to earn the "Work with Variable Data in C# Console Applications" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-arrays-operations/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-arrays-operations/</a> へ移動し、「C# でヘルパー メソッドを使用して配列の操作を実行する (Perform Operations on Arrays Using Helper Methods in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# コンソール アプリケーションで変数データを操作する」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-arrays-operations/" target="_blank" rel="noreferrer">Perform Operations on Arrays Using Helper Methods in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-arrays-operations/" target="_blank" rel="noreferrer">C# でヘルパー メソッドを使用して配列の操作を実行する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which method changes the order of items in an `string` array?
+`string` 配列の項目の順序を変更するメソッドはどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/trophy-work-with-variable-data-in-c-sharp-console-applications.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/trophy-work-with-variable-data-in-c-sharp-console-applications.md
index 59f6dfd85c8..fcfc366b351 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/trophy-work-with-variable-data-in-c-sharp-console-applications.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/trophy-work-with-variable-data-in-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647f867a07d29547b3bee1bc
-title: 'Trophy - Work with Variable Data in C# Console Applications'
+title: 'トロフィー - C# コンソールアプリケーションで変数データを扱う'
 challengeType: 18
 dashedName: trophy-work-with-variable-data-in-c-sharp-console-applications
 msTrophyId: learn.wwl.get-started-c-sharp-part-4.trophy
@@ -8,6 +8,6 @@ msTrophyId: learn.wwl.get-started-c-sharp-part-4.trophy
 
 # --description--
 
-Now that you've completed all of the "Work with Variable Data in C# Console Applications" challenges, you should have earned the trophy for it on the Microsoft Learn platform. If you don't see this trophy when viewing <a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">your achievements page</a>, you have not completed all the tasks and your trophy cannot be verified.
+「C# コンソールアプリケーションで変数データを扱う (Work with Variable Data in C# Console Applications)」のチャレンジがすべて完了すると、Microsoft Learn プラットフォームでトロフィーが獲得できます。 該当するトロフィーが<a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">実績ページ</a>に表示されていない場合は、まだすべてのタスクが完了しておらず、トロフィーの確認ができない状態です。
 
-Link your Microsoft username to your freeCodeCamp account and click the "Verify Trophy" button below to complete the challenge. This trophy is **required** to qualify for the certification exam.
+あなたの Microsoft ユーザー名と freeCodeCamp アカウントをリンクした後、このページ下部の「トロフィーを確認」ボタンをクリックしてチャレンジを完了させてください。 このトロフィーは、認定試験の受験資格を得るために**必須**となります。
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/guided-project-calculate-and-print-student-grades.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/guided-project-calculate-and-print-student-grades.md
index 131c73af39c..4b5ae1ff05a 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/guided-project-calculate-and-print-student-grades.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/guided-project-calculate-and-print-student-grades.md
@@ -1,26 +1,26 @@
 ---
 id: 647e235a8acb466c97ccbf00
-title: Guided Project - Calculate and Print Student Grades
+title: ガイド付きプロジェクト - 学生の成績を計算して印刷する
 challengeType: 19
 dashedName: guided-project-calculate-and-print-student-grades
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/guided-project-calculate-print-student-grades/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-calculate-print-student-grades/</a> and complete all the tasks for the "Guided Project - Calculate and Print Student Grades" module. This is **required** to earn the "Write Your First Code Using C#" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/guided-project-calculate-print-student-grades/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-calculate-print-student-grades/</a> へ移動し、「ガイド付きプロジェクト - 学生の成績を計算して印刷する (Guided Project - Calculate and Print Student Grades)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# を使用して最初のコードを書く」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/guided-project-calculate-print-student-grades/" target="_blank" rel="noreferrer">Calculate and Print Student Grades</a> guided project on Microsoft Learn. Then, answer the question below.
+Microsoft Learn でガイド付きプロジェクト「<a href="https://learn.microsoft.com/training/modules/guided-project-calculate-print-student-grades/" target="_blank" rel="noreferrer">学生の成績を計算して印刷する</a>」を完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-What is wrong with the following code?
+下記のコードのどこに誤りがありますか？
 
 ```clike
 int sophiaSum;
@@ -29,15 +29,15 @@ Console.WriteLine("Sophia: " + sophiaSum);
 
 ## --answers--
 
-`sophiaSum` is not initialized before use
+`sophiaSum` が使用前に初期化されていない
 
 ---
 
-`sophiaSum` is not implicitly typed to a string
+`sophiaSum` が暗黙的に文字列型となっていない
 
 ---
 
-`sophiaSum` should use the var keyword
+`sophiaSum` には var というキーワードを使うべきである
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/guided-project-calculate-final-gpa.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/guided-project-calculate-final-gpa.md
index 6a5491e8f12..9742bb29837 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/guided-project-calculate-final-gpa.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/guided-project-calculate-final-gpa.md
@@ -1,28 +1,28 @@
 ---
 id: 647e236d8acb466c97ccbf01
-title: Guided Project - Calculate Final GPA
+title: ガイド付きプロジェクト - 最終的な GPA を計算する
 challengeType: 19
 dashedName: guided-project-calculate-final-gpa
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/guided-project-calculate-final-gpa/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-calculate-final-gpa/</a> and complete all the tasks for the "Guided Project - Calculate Final GPA" module. This is **required** to earn the "Write Your First Code Using C#" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/guided-project-calculate-final-gpa/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/guided-project-calculate-final-gpa/</a> へ移動し、「ガイド付きプロジェクト - 最終的な GPA を計算する (Guided Project - Calculate Final GPA)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# を使用して最初のコードを書く」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/guided-project-calculate-final-gpa/" target="_blank" rel="noreferrer">Calculate Final GPA</a> guided project on Microsoft Learn. Then, answer the question below.
+Microsoft Learn でガイド付きプロジェクト「<a href="https://learn.microsoft.com/training/modules/guided-project-calculate-final-gpa/" target="_blank" rel="noreferrer">最終的な GPA を計算する</a>」を完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Suppose `decimal gradePointAverage = 3.99872831m;`.
+`decimal gradePointAverage = 3.99872831m;` と仮定します。
 
-What is the value of `(int) gradePointAverage`?
+`(int) gradePointAverage` の値は何になりますか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-operations-on-numbers-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-operations-on-numbers-in-c-sharp.md
index 71e056d641f..7a9714f36b9 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-operations-on-numbers-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-operations-on-numbers-in-c-sharp.md
@@ -1,26 +1,26 @@
 ---
 id: 647e23788acb466c97ccbf02
-title: 'Perform Basic Operations on Numbers in C#'
+title: 'C# で数値に基本的操作を実行する'
 challengeType: 19
 dashedName: perform-basic-operations-on-numbers-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-basic-operations/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-basic-operations/</a> and complete all the tasks for the "Perform Basic Operations on Numbers in C#" module. This is **required** to earn the "Write Your First Code Using C#" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-basic-operations/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-basic-operations/</a> へ移動し、「C# で数値に基本的操作を実行する (Perform Basic Operations on Numbers in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# を使用して最初のコードを書く」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-basic-operations/" target="_blank" rel="noreferrer">Perform Basic Operations on Numbers in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-basic-operations/" target="_blank" rel="noreferrer">C# で数値に基本的操作を実行する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-What is the value of the following result?
+次の result の値は何ですか？
 
 ```clike
 int result = 3 + 1 * 5 / 2;
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-string-formatting-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-string-formatting-in-c-sharp.md
index 6a00bd662df..42a809fa658 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-string-formatting-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-string-formatting-in-c-sharp.md
@@ -1,26 +1,26 @@
 ---
 id: 647e23828acb466c97ccbf03
-title: 'Perform Basic String Formatting in C#'
+title: 'C# で基本的な文字列を書式設定する'
 challengeType: 19
 dashedName: perform-basic-string-formatting-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-basic-formatting/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-basic-formatting/</a> and complete all the tasks for the "Perform Basic String Formatting in C#" module. This is **required** to earn the "Write Your First Code Using C#" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-basic-formatting/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-basic-formatting/</a> へ移動し、「C# で基本的な文字列を書式設定する (Perform Basic String Formatting in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# を使用して最初のコードを書く」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-basic-formatting/" target="_blank" rel="noreferrer">Perform Basic String Formatting in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-basic-formatting/" target="_blank" rel="noreferrer">C# で基本的な文字列を書式設定する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which of the following lines of code correctly uses string interpolation assuming that the variable `value` is a string?
+変数 `value` が文字列だとすると、文字列補間を正しく使用しているコードは次のうちどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/store-and-retrieve-data-using-literal-and-variable-values-in-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/store-and-retrieve-data-using-literal-and-variable-values-in-c-sharp.md
index f229f0d8387..a314a688b33 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/store-and-retrieve-data-using-literal-and-variable-values-in-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/store-and-retrieve-data-using-literal-and-variable-values-in-c-sharp.md
@@ -1,26 +1,26 @@
 ---
 id: 647e238f8acb466c97ccbf04
-title: 'Store and Retrieve Data Using Literal and Variable Values in C#'
+title: 'C# でリテラル値と変数値を使用してデータを格納および取得する'
 challengeType: 19
 dashedName: store-and-retrieve-data-using-literal-and-variable-values-in-c-sharp
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-literals-variables/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-literals-variables/</a> and complete all the tasks for the "Store and Retrieve Data Using Literal and Variable Values in C#" module. This is **required** to earn the "Write Your First Code Using C#" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-literals-variables/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-literals-variables/</a> へ移動し、「C# でリテラル値と変数値を使用してデータを格納および取得する (Store and Retrieve Data Using Literal and Variable Values in C#)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# を使用して最初のコードを書く」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-literals-variables/" target="_blank" rel="noreferrer">Store and Retrieve Data Using Literal and Variable Values in C#</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-literals-variables/" target="_blank" rel="noreferrer">C# でリテラル値と変数値を使用してデータを格納および取得する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-Which of the following lines of code creates a variable correctly?
+次のうち、変数を正しく作成するコードはどれですか？
 
 ## --answers--
 
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/trophy-write-your-first-code-using-c-sharp.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/trophy-write-your-first-code-using-c-sharp.md
index c2cad526381..85357f0af0b 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/trophy-write-your-first-code-using-c-sharp.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/trophy-write-your-first-code-using-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647f85d407d29547b3bee1bb
-title: 'Trophy - Write Your First Code Using C#'
+title: 'トロフィー - C# を使用して最初のコードを書く'
 challengeType: 18
 dashedName: trophy-write-your-first-code-using-c-sharp
 msTrophyId: learn.wwl.get-started-c-sharp-part-1.trophy
@@ -8,6 +8,6 @@ msTrophyId: learn.wwl.get-started-c-sharp-part-1.trophy
 
 # --description--
 
-Now that you've completed all of the "Write Your First Code Using C#" challenges, you should have earned the trophy for it on the Microsoft Learn platform. If you don't see this trophy when viewing <a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">your achievements page</a>, you have not completed all the tasks and your trophy cannot be verified.
+「C# を使用して最初のコードを書く (Write Your First Code Using C#)」のチャレンジがすべて完了すると、Microsoft Learn プラットフォームでトロフィーが獲得できます。 該当するトロフィーが<a href="https://learn.microsoft.com/users/me/achievements#trophies-section" target="_blank" rel="noreferrer">実績ページ</a>に表示されていない場合は、まだすべてのタスクが完了しておらず、トロフィーの確認ができない状態です。
 
-Link your Microsoft username to your freeCodeCamp account and click the "Verify Trophy" button below to complete the challenge. This trophy is **required** to qualify for the certification exam.
+あなたの Microsoft ユーザー名と freeCodeCamp アカウントをリンクした後、このページ下部の「トロフィーを確認」ボタンをクリックしてチャレンジを完了させてください。 このトロフィーは、認定試験の受験資格を得るために**必須**となります。
diff --git a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/write-your-first-c-sharp-code.md b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/write-your-first-c-sharp-code.md
index e9da470c2a1..b1e1885c275 100644
--- a/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/write-your-first-c-sharp-code.md
+++ b/curriculum/challenges/japanese/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/write-your-first-c-sharp-code.md
@@ -1,38 +1,38 @@
 ---
 id: 647e239e8acb466c97ccbf05
-title: 'Write Your First C# Code'
+title: '最初の C# コードを記述する'
 challengeType: 19
 dashedName: write-your-first-c-sharp-code
 ---
 
 # --description--
 
-This challenge will be partially completed on the Microsoft Learn platform. Follow these instructions to complete the challenge:
+このチャレンジには Microsoft Learn プラットフォームで実行するパートがあります。 下記の手順に従ってチャレンジを完了させてください:
 
-1. Go to <a href="https://learn.microsoft.com/training/modules/csharp-write-first/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-write-first/</a> and complete all the tasks in the "Write Your First C# Code" module. This is **required** to earn the "Write Your First Code Using C#" trophy on Microsoft Learn, and qualify for the certification exam.
-1. When you are finished, come back and correctly answer the question below.
+1. <a href="https://learn.microsoft.com/training/modules/csharp-write-first/" target="_blank" rel="noreferrer">https://learn.microsoft.com/training/modules/csharp-write-first/</a> へ移動し、「最初の C# コードを記述する (Write Your First C# Code)」モジュール内のすべてのタスクを完了してください。 これは、Microsoft Learn のトロフィー「C# を使用して最初のコードを書く」を獲得し、認定試験の受験資格を得るために**必須**となります。
+1. 完了後、このページに戻り、下記の質問に正しく回答してください。
 
 # --assignment--
 
-Complete the <a href="https://learn.microsoft.com/training/modules/csharp-write-first/" target="_blank" rel="noreferrer">Write Your First C# Code</a> module on Microsoft Learn. Then, answer the question below.
+Microsoft Learn で「<a href="https://learn.microsoft.com/training/modules/csharp-write-first/" target="_blank" rel="noreferrer">最初の C# コードを記述する</a>」モジュールを完了してください。 次に、下記の質問に回答してください。
 
 # --question--
 
 ## --text--
 
-What is the difference between `Console.Write` and `Console.WriteLine`?
+`Console.Write` と `Console.WriteLine` の違いは何ですか？
 
 ## --answers--
 
-`Console.Write` prints the output on a new line.
+`Console.Write` は出力を新しい行に表示する
 
 ---
 
-`Console.WriteLine` prints the output on a new line.
+`Console.WriteLine` は出力を新しい行に表示する
 
 ---
 
-`Console.WriteLine` appends a new line after the output.
+`Console.WriteLine` は出力の後に新しい行を追加する
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/japanese/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md b/curriculum/challenges/japanese/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
index fa5b427fdc5..857d52d4c51 100644
--- a/curriculum/challenges/japanese/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
+++ b/curriculum/challenges/japanese/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
@@ -1,5 +1,5 @@
 ---
-id: 657e0d0037192f3d9e3d5417 
+id: 657e0d0037192f3d9e3d5417
 title: Task 128
 challengeType: 22
 dashedName: task-128
diff --git a/curriculum/challenges/japanese/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md b/curriculum/challenges/japanese/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
index f8949309ce8..8b4e002d454 100644
--- a/curriculum/challenges/japanese/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
+++ b/curriculum/challenges/japanese/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
@@ -13,7 +13,7 @@ Bob: Alright, team. This is Alice's first day with _ , so please let _ introduce
 -->
 # --description--
 
-You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sould more natural. Listen for the object pronouns Bob uses in this audio.
+You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sound more natural. Listen for the object pronouns Bob uses in this audio.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/abundant-deficient-and-perfect-number-classifications.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/abundant-deficient-and-perfect-number-classifications.md
index 3436bf95e10..ba81efac332 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/abundant-deficient-and-perfect-number-classifications.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/abundant-deficient-and-perfect-number-classifications.md
@@ -16,9 +16,9 @@ $P(n)$ は、真の約数が `n` 自身以外の正の整数 `n` である場合
 
 `P(n) === n` の場合、`n` は `perfect` に分類されます。
 
-`P(n) > n` の場合 `n` は `abundant`に分類されます。
+`P(n) > n` の場合 `n` は `abundant` に分類されます。
 
-**例**: `6` の真の約数は、`1`, `2`, `3`です。 `1 + 2 + 3 = 6` なので、`6` は完全数に分類されます。
+**例**: `6` の真の約数は、`1`, `2`, `3` です。 `1 + 2 + 3 = 6` なので、`6` は完全数に分類されます。
 
 # --instructions--
 
@@ -38,25 +38,25 @@ assert(typeof getDPA === 'function');
 assert(Array.isArray(getDPA(5000)));
 ```
 
-`getDPA(5000)` は長さ`3`の配列を返します。
+`getDPA(5000)` は長さ `3` の配列を返します。
 
 ```js
 assert(getDPA(5000).length === 3);
 ```
 
-`getDPA(5000)` は`[3758, 3, 1239]`を返します。
+`getDPA(5000)` は `[3758, 3, 1239]` を返します。
 
 ```js
 assert.deepEqual(getDPA(5000), [3758, 3, 1239]);
 ```
 
-`getDPA(10000)` は`[7508, 4, 2488]`を返します。
+`getDPA(10000)` は `[7508, 4, 2488]` を返します。
 
 ```js
 assert.deepEqual(getDPA(10000), [7508, 4, 2488]);
 ```
 
-`getDPA(20000)` は`[15043, 4, 4953]`を返します。
+`getDPA(20000)` は `[15043, 4, 4953]` を返します。
 
 ```js
 assert.deepEqual(getDPA(20000), [15043, 4, 4953]);
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/align-columns.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/align-columns.md
index c8ca4c96a65..2747eb319a7 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/align-columns.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/align-columns.md
@@ -48,7 +48,7 @@ For example, one of the lines from the `testText`, after justifying to the right
 
 # --hints--
 
-`formatText` という関数です。
+`formatText` という関数があります。
 
 ```js
 assert(typeof formatText === 'function');
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/averages-mode.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/averages-mode.md
index 37c5635bc73..8d5a8f194f7 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/averages-mode.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/averages-mode.md
@@ -1,6 +1,6 @@
 ---
 id: 594d8d0ab97724821379b1e6
-title: 平均/最頻値
+title: 平均 / 最頻値
 challengeType: 1
 forumTopicId: 302226
 dashedName: averagesmode
@@ -12,7 +12,7 @@ Write a function `mode` to find the value that appears most in an array.
 
 データが空の場合は無視します。 最頻値が1つではない場合には注意が必要です。
 
-一般的なデータの使用が不適切または不可能な場合は、可能であればベクトル(配列)を使用します。 指定されていない値型の使用が不適切または不可能な場合は、整数を使用します。
+一般的なデータの使用が不適切または不可能な場合は、可能であればベクトル (配列) を使用します。 指定されていない値型の使用が不適切または不可能な場合は、整数を使用します。
 
 # --hints--
 
@@ -22,13 +22,13 @@ Write a function `mode` to find the value that appears most in an array.
 assert(typeof mode === 'function');
 ```
 
-`mode([1, 3, 6, 6, 6, 6, 7, 7, 12, 12, 17])` は `[6]`になります。
+`mode([1, 3, 6, 6, 6, 6, 7, 7, 12, 12, 17])` は `[6]` になります。
 
 ```js
 assert.deepEqual(mode(arr1), [6]);
 ```
 
-`mode([1, 2, 4, 4, 1])` は `[1, 4]`になります。
+`mode([1, 2, 4, 4, 1])` は `[1, 4]` になります。
 
 ```js
 assert.deepEqual(mode(arr2).sort(), [1, 4]);
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/babbage-problem.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/babbage-problem.md
index e9b42685795..315d30366d5 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/babbage-problem.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/babbage-problem.md
@@ -15,7 +15,7 @@ Charles Babbage, looking ahead to the sorts of problems his Analytical Engine wo
   <footer style='margin-left: 2em;'>Babbage, letter to Lord Bowden, 1837; see Hollingdale and Tootill, <i>Electronic Computers</i>, second edition, 1970, p. 125.</footer>
 </blockquote>
 
-答えは99,736で、その2乗は9,947,269,696であると考えましたが、確信はありませんでした。
+答えは 99,736 で、その 2 乗は 9,947,269,696 であると考えましたが、確信はありませんでした。
 
 バベッジの答えが正しかったかどうかを調べましょう。
 
@@ -25,13 +25,13 @@ Charles Babbage, looking ahead to the sorts of problems his Analytical Engine wo
 
 # --hints--
 
-`babbage` という関数です。
+`babbage` という関数があります。
 
 ```js
 assert(typeof babbage === 'function');
 ```
 
-`babbage(99736, 269696)` は 99736 を返さないはずです(もっと小さな答えがあります)。
+`babbage(99736, 269696)` は 99736 を返さないはずです (もっと小さな答えがあります)。
 
 ```js
 assert.equal(babbage(babbageAns, endDigits), answer);
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/comma-quibbling.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/comma-quibbling.md
index 8161941b7f4..f057f315bc3 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/comma-quibbling.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/comma-quibbling.md
@@ -1,6 +1,6 @@
 ---
 id: 596e414344c3b2872167f0fe
-title: コンマキブリング
+title: コンマの追加
 challengeType: 1
 forumTopicId: 302234
 dashedName: comma-quibbling
@@ -12,13 +12,13 @@ dashedName: comma-quibbling
 
 # --instructions--
 
-リスト/シーケンスからの入力単語の連結である文字列を出力する関数を作成します。
+リスト / シーケンスからの入力単語の連結である文字列を出力する関数を作成します。
 
 <ol>
   <li>An input of no words produces the output string of just the two brace characters (<code>"{}"</code>)</li>
-  <li>1単語、例えば <code>["ABC"]</code>、だけを入力した場合、<code>"{ABC}"</code> のように、2つの中括弧の中にその単語が出力文字列として生成されます。</li>
-  <li>2つの単語、例えば <code>["ABC", "DEF"]</code>、を入力した場合、<code>"{ABC and DEF}"</code> のように、文字列 <code>" and "</code> に区切られた2つの単語が、2つの中括弧の中に出力文字列として生成されます。</li>
-  <li>3つ以上の単語、 例えば <code>["ABC", "DEF", "G", "H"]</code> を入力した場合、<code>"{ABC, DEF, G and H}"</code> のように、最後の単語以外のすべての単語は、<code>", "</code> で区切られ、最後の単語は <code>" and "</code> で区切られ、すべての単語が中括弧の中に出力文字列として生成されます。</li>
+  <li>1 単語、例えば <code>["ABC"]</code>、だけを入力した場合、<code>"{ABC}"</code> のように、2 つの中括弧の中にその単語が出力文字列として生成されます。</li>
+  <li>2 つの単語、例えば <code>["ABC", "DEF"]</code>、を入力した場合、<code>"{ABC and DEF}"</code> のように、文字列 <code>" and "</code> に区切られた 2 つの単語が、2 つの中括弧の中に出力文字列として生成されます。</li>
+  <li>3 つ以上の単語、 例えば <code>["ABC", "DEF", "G", "H"]</code> を入力した場合、<code>"{ABC, DEF, G and H}"</code> のように、最後の単語以外のすべての単語は、<code>", "</code> で区切られ、最後の単語は <code>" and "</code> で区切られ、すべての単語が中括弧の中に出力文字列として生成されます。</li>
 </ol>
 
 次の一連の入力によりこのページに出力表示して、関数をテストします。
@@ -34,7 +34,7 @@ dashedName: comma-quibbling
 
 # --hints--
 
-`quibble` という関数です。
+`quibble` という関数があります。
 
 ```js
 assert(typeof quibble === 'function');
@@ -46,7 +46,7 @@ assert(typeof quibble === 'function');
 assert(typeof quibble(['ABC']) === 'string');
 ```
 
-`quibble([])` は "{}"を返します。
+`quibble([])` は "{}" を返します。
 
 ```js
 assert.equal(quibble(testCases[0]), results[0]);
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md
index 27475afc108..685b5f5fae1 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md
@@ -15,7 +15,7 @@ Implement a function which:
   <li>以下の詳細のように、週、日、時、分、秒に分解された同じ期間を示す文字列を返します (例えば <code>1 min, 40 sec</code>)。</li>
 </ul>
 
-次の3つのテストケースで正しく変換されることを示します。
+次の 3 つのテストケースで正しく変換されることを示します。
 
 <div style='font-size:115%; font-weight: bold;'>テストケース</div>
 
@@ -46,7 +46,7 @@ Implement a function which:
     可能な限り小さな単位よりも大きな単位を優先します (例えば <code>1 min, 70 sec</code> または <code>130 sec</code> ではなく、<code>2 min, 10 sec</code> を返します)。
   </li>
   <li>
-    テストケースに表示される書式設定（数量が最大単位から最小単位の順でソートされ、カンマ+スペースで区切られ、各数量の値と単位がスペースで区切られる）にします。
+    テストケースに表示される書式設定（数量が最大単位から最小単位の順でソートされ、カンマ + スペースで区切られ、各数量の値と単位がスペースで区切られる）にします。
   </li>
 </ul>
 
@@ -64,7 +64,7 @@ assert(typeof convertSeconds === 'function');
 assert.equal(convertSeconds(testCases[0]), results[0]);
 ```
 
-`convertSeconds(86400)` は `1 d` をを返します。
+`convertSeconds(86400)` は `1 d` を返します。
 
 ```js
 assert.equal(convertSeconds(testCases[1]), results[1]);
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
index 8aa31fa0e9c..88de72f7b4d 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
@@ -10,29 +10,29 @@ dashedName: deal-cards-for-freecell
 
 *FreeCell* is the solitaire card game that Paul Alfille introduced to the PLATO system in 1978. Jim Horne, at Microsoft, changed the name to FreeCell and reimplemented the game for DOS, then Windows. This version introduced 32000 numbered deals.
 
-ゲームが普及し、ジム・ホーンがアルゴリズムを開示したため、他のフリーセル実装でもMicrosoftと同様のアルゴリズムでカードが配られるようになりました。 カードの配り方には1から32000まで番号が付けられています。 Microsoftの新しいバージョンでは、1から1000000までの番号が付けられた100万のゲーム番号があります。一部の実装では、この範囲外の番号も使用されています。
+ゲームが普及し、ジム・ホーンがアルゴリズムを開示したため、他のフリーセル実装でも Microsoft と同様のアルゴリズムでカードが配られるようになりました。 カードの配り方には 1 から 32000 まで番号が付けられています。 Microsoft の新しいバージョンでは、1 から 1000000 までの番号が付けられた 100 万のゲーム番号があります。一部の実装では、この範囲外の番号も使用されています。
 
 このアルゴリズムでは Microsoft C の線形合同法が使用されています。
 
 <ul>
   <li>$state_{n + 1} \equiv 214013 \times state_n + 2531011 \pmod{2^{31}}$</li>
   <li>$rand_n = state_n \div 2^{16}$</li>
-  <li>$rand_n$ は 0から32767の範囲です。</li>
+  <li>$rand_n$ は 0 から 32767 の範囲です。</li>
 </ul>
 
 アルゴリズムは以下のとおりです。
 
 <ol>
   <li>Seed the RNG with the number of the deal.
-  </li><li>52 枚のカードの配列を作成します。クラブのエース、ダイヤモンドのエース、ハートのエース、スペードのエース、クラブの 2、ダイヤモンドの 2、…と続き、エース、2、3、4、5、6、7、8、9、10、ジャック、クイーン、キングまで続きます。 配列インデックスは0から51で、クラブのエースは0、スペードのキングは51です。</li>
-  <li>配列が空になるまでです。</li>
-  <li>インデックスでランダムなカードを選択します≡ 次の乱数(Mod配列の長さ)。</li>
+  </li><li>52 枚のカードの配列を作成します。クラブのエース、ダイヤモンドのエース、ハートのエース、スペードのエース、クラブの 2、ダイヤモンドの 2、…と続き、エース、2、3、4、5、6、7、8、9、10、ジャック、クイーン、キングまで続きます。 配列インデックスは 0 から 51 で、クラブのエースは 0、スペードのキングは 51 です。</li>
+  <li>配列が空になるまで、以下の手順を実行します。</li>
     <ul>
+      <li>Choose a random card at <i>index</i> ≡ <i>next random number</i> (mod <i>array length</i>).</li>
       <li>Swap this random card with the last card of the array.</li>
-      <li>このランダムなカードを配列から削除します (配列の数が1つ減る)。</li>
-      <li>このランダムなカードを配ります。</li>
+      <li>Remove this random card from the array. (Array length goes down by 1.)</li>
+      <li>Deal this random card.</li>
     </ul>
-  <li>52枚すべてのカードを、表を上にして8列に配ります。 最初の8枚のカードが8列に配られ、その上に次の8枚のカードが配られ、と続いていきます。</li>
+  <li>Deal all 52 cards, face up, across 8 columns. The first 8 cards go in 8 columns, the next 8 cards go on the first 8 cards, and so on.</li>
 </ol>
 
 **例:**
@@ -47,7 +47,7 @@ dashedName: deal-cards-for-freecell
 41 42 43 44 45 46 47 48
 49 50 51 52</pre>
 
-**ゲーム#1**
+**ゲーム #1**
 
 ```js
 [
@@ -61,7 +61,7 @@ dashedName: deal-cards-for-freecell
 ]
 ```
 
-**ゲーム#617**
+**ゲーム #617**
 
 ```js
 [
@@ -77,7 +77,7 @@ dashedName: deal-cards-for-freecell
 
 # --instructions--
 
-ゲーム番号を受け取り、このアルゴリズムと同じ順序でカードを配る関数を作成します。 この関数はフリーセルボードを表す2次元配列を返します。
+ゲーム番号を受け取り、このアルゴリズムと同じ順序でカードを配る関数を作成します。 この関数はフリーセルボードを表す 2 次元配列を返します。
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/evaluate-binomial-coefficients.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/evaluate-binomial-coefficients.md
index 328eae2e13a..1e30a1a81ba 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/evaluate-binomial-coefficients.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/evaluate-binomial-coefficients.md
@@ -16,37 +16,37 @@ $\\binom{n}{k} = \\frac{n!}{(n-k)!k!} = \\frac{n(n-1)(n-2)\\ldots(n-k+1)}{k(k-1)
 
 # --hints--
 
-`binom` という関数です。
+`binom` は関数でなければなりません。
 
 ```js
 assert(typeof binom === 'function');
 ```
 
-`binom(5,3)` は10を返します。
+`binom(5,3)` は 10 を返します。
 
 ```js
 assert.equal(binom(5, 3), 10);
 ```
 
-`binom(7,2)` は21を返します。
+`binom(7,2)` は 21 を返します。
 
 ```js
 assert.equal(binom(7, 2), 21);
 ```
 
-`binom(10,4)` は210を返します。
+`binom(10,4)` は 210 を返します。
 
 ```js
 assert.equal(binom(10, 4), 210);
 ```
 
-`binom(6,1)` は6を返します。
+`binom(6,1)` は 6 を返します。
 
 ```js
 assert.equal(binom(6, 1), 6);
 ```
 
-`binom(12,8)` は495を返します。
+`binom(12,8)` は 495 を返します。
 
 ```js
 assert.equal(binom(12, 8), 495);
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/execute-a-markov-algorithm.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/execute-a-markov-algorithm.md
index 4215cc1dcd5..908bcfedf1c 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/execute-a-markov-algorithm.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/execute-a-markov-algorithm.md
@@ -10,9 +10,9 @@ dashedName: execute-a-markov-algorithm
 
 Markov Concepts are used in machine learning, because of its simple approach in data manipulation. With a set number of `rules` you can manipulate given `data` to create a desired `output`.
 
-バックグラウンドに追加しました:
+以下のものが用意されています:
 
-The `rules` in the form of nested array, and the `data` in the form of array, too. そして、望ましい `outputs` です。
+ネストされた配列の形式の `rules`、同じく配列の形式の `data`、 そして、期待する `outputs` です。
 
 `rules`:
 
@@ -76,7 +76,7 @@ let outputs=[
 
 # --hints--
 
-`markov` という関数です。
+`markov` は関数でなければなりません。
 
 ```js
 assert(typeof markov === 'function');
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/execute-brain.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/execute-brain.md
index e9877a2c436..62a7d597284 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/execute-brain.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/execute-brain.md
@@ -1,6 +1,6 @@
 ---
 id: 59e0a8df964e4540d5abe599
-title: Brain****の実行
+title: Execute Brain****
 challengeType: 1
 forumTopicId: 302261
 dashedName: execute-brain
@@ -10,28 +10,28 @@ dashedName: execute-brain
 
 Write a function to implement a Brain\*\*\*\* interpreter. The function will take a string as a parameter and should return a string as the output. More details are given below:
 
-RCBFは ロゼッタコード用に様々な言語で書かれた<a href="https://rosettacode.org/wiki/Brainf***" target="_blank" rel="noopener noreferrer nofollow">Brainf\*\*\*</a> コンパイラおよびインタプリタのセットです。
+RCBF is a set of <a href="https://rosettacode.org/wiki/Brainf***" target="_blank" rel="noopener noreferrer nofollow">Brainf\*\*\*</a> compilers and interpreters written for Rosetta Code in a variety of languages.
 
-以下は、RCBFの各バージョンへのリンクです。
+Below are links to each of the versions of RCBF.
 
-実装には以下の手順を適切に実行する必要があります。
+An implementation need only properly implement the following instructions:
 
-| Command                   | 説明                                                          |
-| ------------------------- | ----------------------------------------------------------- |
-| <code>></code> | Move the pointer to the right                               |
-| <code>&lt;</code> | ポインタを左に移動します                                                |
-| <code>+</code> | ポインタの下にあるメモリーセルを増やします                                       |
-| <code>-</code> | ポインタの下にあるメモリーセルを減らします                                       |
-| <code>.</code> | ポインターのセルで示された文字を出力します                                       |
-| <code>,</code> | 文字を入力し、ポインタのセルに格納します                                        |
-| <code>\[</code> | ポインタの下のセルが 0 の場合、一致する <code>]</code> をジャンプします      |
-| <code>]</code> | ポインタの下のセルがゼロでない場合、一致する <code>\[</code> にジャンプして戻ります |
+| Command           | Description                                                                        |
+| ----------------- | ---------------------------------------------------------------------------------- |
+| <code>></code>    | Move the pointer to the right                                                      |
+| <code>&lt;</code> | Move the pointer to the left                                                       |
+| <code>+</code>    | Increment the memory cell under the pointer                                        |
+| <code>-</code>    | Decrement the memory cell under the pointer                                        |
+| <code>.</code>    | Output the character signified by the cell at the pointer                          |
+| <code>,</code>    | Input a character and store it in the cell at the pointer                          |
+| <code>\[</code>   | Jump past the matching <code>]</code> if the cell under the pointer is 0           |
+| <code>]</code>    | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
 
-セルのサイズに制限はありません。メモリに制限があるかどうかに関わらず、EOF (*E*nd-*O*-*F*ile) のサポートは任意です。
+Any cell size is allowed, EOF (*E*nd-*O*-*F*ile) support is optional, as is whether you have bounded or unbounded memory.
 
 # --hints--
 
-`brain(bye)` は文字列を返します。
+`brain(bye)` should return a string
 
 ```js
 assert(typeof brain(bye) === 'string');
@@ -43,19 +43,19 @@ assert(typeof brain(bye) === 'string');
 assert.equal(brain('++++++[>++++++++++<-]>+++++.'), 'A');
 ```
 
-`brain(bye)` は `Goodbye, World!\r\n` を返します。
+`brain(bye)` should return `Goodbye, World!\r\n`
 
 ```js
 assert.equal(brain(bye), 'Goodbye, World!\r\n');
 ```
 
-`brain(hello)` は `Hello World!\n` を返します。
+`brain(hello)` should return `Hello World!\n`
 
 ```js
 assert.equal(brain(hello), 'Hello World!\n');
 ```
 
-`brain(fib)` は `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89` を返します。
+`brain(fib)` should return `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89`
 
 ```js
 assert.equal(brain(fib), '1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89');
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/factorial.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/factorial.md
index 2223d06f6fd..368b4af4372 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/factorial.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/factorial.md
@@ -38,19 +38,19 @@ assert(typeof factorial === 'function');
 assert(typeof factorial(2) === 'number');
 ```
 
-`factorial(3)` は6を返します。
+`factorial(3)` は 6 を返します。
 
 ```js
 assert.equal(factorial(3), 6);
 ```
 
-`factorial(5)` は120を返します。
+`factorial(5)` は 120 を返します。
 
 ```js
 assert.equal(factorial(5), 120);
 ```
 
-`factorial(10)` は3,628,800を返します。
+`factorial(10)` は 3,628,800 を返します。
 
 ```js
 assert.equal(factorial(10), 3628800);
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/factors-of-a-mersenne-number.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/factors-of-a-mersenne-number.md
index 6a3982f18a1..d88f5c477a8 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/factors-of-a-mersenne-number.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/factors-of-a-mersenne-number.md
@@ -10,21 +10,21 @@ dashedName: factors-of-a-mersenne-number
 
 A Mersenne number is a number in the form of <code>2<sup>P</sup>-1</code>.
 
-`P` が素数の場合、メルセンヌ数はメルセンヌの素数である場合があります。 ( `P` が素数でない場合、メルセンヌ数も素数ではありません。)
+`P` が素数の場合、メルセンヌ数はメルセンヌの素数である場合があります。 (`P` が素数でない場合、メルセンヌ数も素数ではありません。)
 
-メルセンヌ素数を求めるには、長い時間を要する可能性がある <a href="https://rosettacode.org/wiki/Lucas-Lehmer test" target="_blank" rel="noopener noreferrer nofollow">Lucas-Lehmer test</a> を開始する前に、小さな因数を見つけることによって指数を除去することをお勧めします。
+メルセンヌ素数を求めるには、長い時間を要する可能性がある <a href="https://rosettacode.org/wiki/Lucas-Lehmer test" target="_blank" rel="noopener noreferrer nofollow">リュカ–レーマー・テスト</a> を開始する前に、小さな因数を見つけることによって指数を除去することをお勧めします。
 
 数字が <code>2<sup>P</sup>-1</code> を割るかどうか (すなわち、<code>2<sup>P</sup> mod (the number) = 1</code> となるかどうか) を判定するのに適した非常に効率的なアルゴリズムがあります。
 
 指数と剰余演算 (modPow などと呼ばれる) の組み込み実装が既にある言語もあります。
 
-以下は、このmodPowを自分で実装する方法です。
+以下は、この modPow を自分で実装する方法です。
 
-例えば、 <code>2<sup>23</sup> mod 47</code> を計算してみましょう。
+例えば、<code>2<sup>23</sup> mod 47</code> を計算してみましょう。
 
-指数23を2進数に変換すると、10111が得られます。 <code><tt>square</tt> = 1</code> から始めて、繰り返し2乗にしていきます。
+指数 23 を 2 進数に変換すると、10111 が得られます。 <code><tt>square</tt> = 1</code> から始めて、繰り返し 2 乗にしていきます。
 
-指数の上位ビットを削除し、1である場合、`square` に冪乗の底 (2) を掛けて、<code><tt>square</tt> modulo 47</code>を計算します。
+指数の上位ビットを削除し、1 である場合、`square` に冪乗の底 (2) を掛けて、<code><tt>square</tt> modulo 47</code> を計算します。
 
 最後のステップのモジュロの結果を、次のステップの `square` の初期値として使用します。
 
@@ -38,19 +38,19 @@ square        top bit  multiply by 2  mod 47
 27*27 = 729   1        729*2 = 1458      1
 </pre>
 
-<code>2<sup>23</sup> mod 47 = 1</code>であるため、 47 は <code>2<sup>P</sup>-1</code> の因数です。
+<code>2<sup>23</sup> mod 47 = 1</code>であるため、47 は <code>2<sup>P</sup>-1</code> の因数です。
 
-(これを理解するには、両辺から1を引きます: <code>2<sup>23</sup>-1 = 0 mod 47</code>。)
+(これを理解するには、両辺から 1 を引きます: <code>2<sup>23</sup>-1 = 0 mod 47</code>。)
 
 47 が因数であるとしているので、<code>2<sup>23</sup>-1</code> は素数ではありません。
 
 メルセンヌ数には他にも特有の性質があるため、メルセンヌ数を使用するとプロセスをもっと改善できます。
 
-<code>2<sup>P</sup>-1</code> の因数 `q` は `2kP+1`の形を取り、`k` は正の整数またはゼロです。 さらに、`q` は `1` または `7 mod 8` です。
+<code>2<sup>P</sup>-1</code> の因数 `q` は `2kP+1` の形を取り、`k` は正の整数またはゼロです。 さらに、`q` は `1` または `7 mod 8` です。
 
 最後に、潜在的因数 `q` は<a href="https://rosettacode.org/wiki/Primality_by_trial_division" target="_blank" rel="noopener noreferrer nofollow">素数</a>でなければなりません。
 
-他の試行徐算アルゴリズムと同様に、アルゴリズムは `2kP+1 > sqrt(N)`となった場合に停止します。これらのテストは、`P` が素数である場合に、メルセンヌ数に対してのみ働きます。 例えば、<code>M<sub>4</sub>=15</code> はこれらの手法で因数を生成しません。3と5を考えると、いずれも`2kP+1`に適合しません。
+他の試行徐算アルゴリズムと同様に、アルゴリズムは `2kP+1 > sqrt(N)`となった場合に停止します。これらのテストは、`P` が素数である場合に、メルセンヌ数に対してのみ働きます。 例えば、<code>M<sub>4</sub>=15</code> はこれらの手法で因数を生成しません。3 と 5 を考えると、いずれも `2kP+1` に適合しません。
 
 # --instructions--
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/fibonacci-sequence.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/fibonacci-sequence.md
index eb6a204311f..82b76ef0756 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/fibonacci-sequence.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/fibonacci-sequence.md
@@ -10,13 +10,13 @@ dashedName: fibonacci-sequence
 
 Write a function to generate the <code>n<sup>th</sup></code> Fibonacci number.
 
-<code>n<sup>th</sup></code> フィボナッチ数は以下にように計算されます。
+<code>n</code> 番目のフィボナッチ数は以下のように計算されます。
 
 <code>F<sub>n</sub> = F<sub>n-1</sub> + F<sub>n-2</sub></code>
 
-級数の最初の2つの項は0と1です。
+級数の最初の 2 つの項は 0 と 1 です。
 
-したがって、級数は0、1、1、2、3、5、8、13です。
+したがって、級数は 0、1、1、2、3、5、8、13 です。
 
 # --hints--
 
@@ -32,19 +32,19 @@ assert(typeof fibonacci === 'function');
 assert(typeof fibonacci(2) == 'number');
 ```
 
-`fibonacci(3)` は2を返します。
+`fibonacci(3)` は 2 を返します。
 
 ```js
 assert.equal(fibonacci(3), 2);
 ```
 
-`fibonacci(5)` は5を返します。
+`fibonacci(5)` は 5 を返します。
 
 ```js
 assert.equal(fibonacci(5), 5);
 ```
 
-`fibonacci(10)` は55を返します。
+`fibonacci(10)` は 55 を返します。
 
 ```js
 assert.equal(fibonacci(10), 55);
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/fizzbuzz.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/fizzbuzz.md
index c802fefd861..20729cd0599 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/fizzbuzz.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/fizzbuzz.md
@@ -12,8 +12,8 @@ Write a program that generates an array of integers from 1 to 100 (inclusive). B
 
 <ul>
     <li>for multiples of 3, add <code>"Fizz"</code> to the array instead of the number</li>
-    <li>5の倍数の場合は、数値ではなく、<code>"Buzz"</code> を配列に 追加します</li>
-    <li>3と5の倍数の場合は、数値ではなく、<code>"FizzBuzz"</code> を配列に 追加します</li>
+    <li>5 の倍数の場合は、数値ではなく、<code>"Buzz"</code> を配列に 追加します</li>
+    <li>3 と 5 の倍数の場合は、数値ではなく、<code>"FizzBuzz"</code> を配列に追加します</li>
 </ul>
 
 # --instructions--
@@ -34,25 +34,25 @@ assert(typeof fizzBuzz == 'function');
 assert(Array.isArray(fizzBuzz()) == true);
 ```
 
-3 でのみ割り切れる数値は、 `"Fizz"` を返す必要があります。
+3 でのみ割り切れる数値は、`"Fizz"` を返す必要があります。
 
 ```js
 assert.equal(fizzBuzz()[2], 'Fizz');
 ```
 
-5 でのみ割り切れる数値は、 `"Buzz"` を返す必要があります。
+5 でのみ割り切れる数値は、`"Buzz"` を返す必要があります。
 
 ```js
 assert.equal(fizzBuzz()[99], 'Buzz');
 ```
 
-3と5 の両方で割り切れる数値は、 `"FizzBuzz"` を返す必要があります。
+3 と 5 の両方で割り切れる数値は、`"FizzBuzz"` を返す必要があります。
 
 ```js
 assert.equal(fizzBuzz()[89], 'FizzBuzz');
 ```
 
-3 または 5のいずれでも割り切れない数値は、その数値自体を返す必要があります。
+3 または 5 のいずれでも割り切れない数値は、その数値自体を返す必要があります。
 
 ```js
 assert.equal(fizzBuzz()[12], 13);
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/fractran.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/fractran.md
index e413b38e4c3..c9c2072ccad 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/fractran.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/fractran.md
@@ -16,26 +16,26 @@ FRACTRAN プログラムは、最初の正の整数入力 $n$ を含む、正の
 
 <ul>
   <li>for the first fraction, $f_i$, in the list for which $nf_i$ is an integer, replace $n$ with $nf_i$ ;</li>
-  <li>$n$を掛けた場合にリスト内の分数が整数を生成しなくなるまで、このルールをくり返した後、停止します。</li>
+  <li>$n$ を掛けた場合にリスト内の分数が整数を生成しなくなるまで、このルールをくり返した後、停止します。</li>
 </ul>
 
-コンウェイ氏はFRACTRANで素数のためのプログラムを記述しました:
+コンウェイ氏は FRACTRAN で素数のためのプログラムを記述しました:
 
 $\\dfrac{17}{91}$, $\\dfrac{78}{85}$, $\\dfrac{19}{51}$, $\\dfrac{23}{38}$, $\\dfrac{29}{33}$, $\\dfrac{77}{29}$, $\\dfrac{95}{23}$, $\\dfrac{77}{19}$, $\\dfrac{1}{17}$, $\\dfrac{11}{13}$, $\\dfrac{13}{11}$, $\\dfrac{15}{14}$, $\\dfrac{15}{2}$, $\\dfrac{55}{1}$
 
-$n=2$から開始して、このFRACTRANプログラムは $n$を $15=2\\times (\\frac{15}{2})$, に、その後、$825=15\\times (\\frac{55}{1})$に変更し、 以下の整数数列を生成します。
+$n=2$ から開始して、この FRACTRAN プログラムは $n$ を $15=2\\times (\\frac{15}{2})$ に、その後、$825=15\\times (\\frac{55}{1})$に変更し、以下の整数数列を生成します。
 
 $2$, $15$, $825$, $725$, $1925$, $2275$, $425$, $390$, $330$, $290$, $770$, $\\ldots$
 
-2 の後には、この数列には以下の2の累乗が含まれます。
+2 の後には、この数列には以下の 2 の累乗が含まれます。
 
 $2^2=4$, $2^3=8$, $2^5=32$, $2^7=128$, $2^{11}=2048$, $2^{13}=8192$, $2^{17}=131072$, $2^{19}=524288$, $\\ldots$
 
-これは2の素数の累乗です。
+これは 2 の素数の累乗です。
 
 # --instructions--
 
-FRACTRANプログラムを文字列パラメータとして取り、プログラムが生成する最初の10個の数値を配列として返す関数を記述してください。 結果が 10 個の数値を持たない場合は、数値をそのまま返します。
+FRACTRAN プログラムを文字列パラメータとして取り、プログラムが生成する最初の 10 個の数値を配列として返す関数を記述してください。 結果が 10 個の数値を持たない場合は、数値をそのまま返します。
 
 # --hints--
 
@@ -51,31 +51,31 @@ assert(typeof fractran == 'function');
 assert(Array.isArray(fractran('3/2, 1/3')));
 ```
 
-`fractran("3/2, 1/3")` は、`[ 2, 3, 1 ]`を返す必要があります。
+`fractran("3/2, 1/3")` は、`[ 2, 3, 1 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(fractran('3/2, 1/3'), [2, 3, 1]);
 ```
 
-`fractran("3/2, 5/3, 1/5")` は、 `[ 2, 3, 5, 1 ]`を返す必要があります。
+`fractran("3/2, 5/3, 1/5")` は、 `[ 2, 3, 5, 1 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(fractran('3/2, 5/3, 1/5'), [2, 3, 5, 1]);
 ```
 
-`fractran("3/2, 6/3")` は、`[ 2, 3, 6, 9, 18, 27, 54, 81, 162, 243 ]`を返す必要があります。
+`fractran("3/2, 6/3")` は、`[ 2, 3, 6, 9, 18, 27, 54, 81, 162, 243 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(fractran('3/2, 6/3'), [2, 3, 6, 9, 18, 27, 54, 81, 162, 243]);
 ```
 
-`fractran("2/7, 7/2")` は、 `[ 2, 7, 2, 7, 2, 7, 2, 7, 2, 7 ]`を返す必要があります。
+`fractran("2/7, 7/2")` は、 `[ 2, 7, 2, 7, 2, 7, 2, 7, 2, 7 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(fractran('2/7, 7/2'), [2, 7, 2, 7, 2, 7, 2, 7, 2, 7]);
 ```
 
-`fractran("17/91, 78/85, 19/51, 23/38, 29/33, 77/29, 95/23, 77/19, 1/17, 11/13, 13/11, 15/14, 15/2, 55/1")` は、 `[ 2, 15, 825, 725, 1925, 2275, 425, 390, 330, 290 ]`を返す必要があります。
+`fractran("17/91, 78/85, 19/51, 23/38, 29/33, 77/29, 95/23, 77/19, 1/17, 11/13, 13/11, 15/14, 15/2, 55/1")` は、 `[ 2, 15, 825, 725, 1925, 2275, 425, 390, 330, 290 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/gaussian-elimination.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/gaussian-elimination.md
index 3885a699237..1fd48c71831 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/gaussian-elimination.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/gaussian-elimination.md
@@ -10,7 +10,7 @@ dashedName: gaussian-elimination
 
 Write a function to solve \\(Ax = b\\) using Gaussian elimination then backwards substitution.
 
-\\(A\\) は \\(n \\times n\\) 行列とします。 また、\\(x\\) と \\(b\\) は \\(n\\) に 1ベクトルを掛けます。
+\\(A\\) は \\(n \\times n\\) 行列とします。 また、\\(x\\) と \\(b\\) は \\(n\\) に 1 ベクトルを掛けます。
 
 精度を向上させるために、部分ピボット選択とスケーリングを使用してください。
 
@@ -22,7 +22,7 @@ Write a function to solve \\(Ax = b\\) using Gaussian elimination then backwards
 assert(typeof gaussianElimination == 'function');
 ```
 
-`gaussianElimination([[1,1],[1,-1]], [5,1])`は、配列を返す必要があります。
+`gaussianElimination([[1,1],[1,-1]], [5,1])` は、配列を返す必要があります。
 
 ```js
 assert(
@@ -38,7 +38,7 @@ assert(
 );
 ```
 
-`gaussianElimination([[1,1],[1,-1]], [5,1])` は、`[ 3, 2 ]`を返す必要があります。
+`gaussianElimination([[1,1],[1,-1]], [5,1])` は、`[ 3, 2 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(
@@ -53,7 +53,7 @@ assert.deepEqual(
 );
 ```
 
-`gaussianElimination([[2,3],[2,1]] , [8,4])` は、`[ 1, 2 ]`を返す必要があります。
+`gaussianElimination([[2,3],[2,1]] , [8,4])` は、`[ 1, 2 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(
@@ -68,7 +68,7 @@ assert.deepEqual(
 );
 ```
 
-`gaussianElimination([[1,3],[5,-2]], [14,19])` は `[ 5, 3 ]`を返す必要があります。
+`gaussianElimination([[1,3],[5,-2]], [14,19])` は `[ 5, 3 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(
@@ -83,7 +83,7 @@ assert.deepEqual(
 );
 ```
 
-`gaussianElimination([[1,1],[5,-1]] , [10,14])` は`[ 4, 6 ]`を返す必要があります。
+`gaussianElimination([[1,1],[5,-1]] , [10,14])` は`[ 4, 6 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(
@@ -98,7 +98,7 @@ assert.deepEqual(
 );
 ```
 
-`gaussianElimination([[1,2,3],[4,5,6],[7,8,8]] , [6,15,23])` は、`[ 1, 1, 1 ]`を返す必要があります。
+`gaussianElimination([[1,2,3],[4,5,6],[7,8,8]] , [6,15,23])` は、`[ 1, 1, 1 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/general-fizzbuzz.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/general-fizzbuzz.md
index 8f2fa8329d2..3d44b6a2c1b 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/general-fizzbuzz.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/general-fizzbuzz.md
@@ -100,7 +100,7 @@ assert.equal(
 );
 ```
 
-`genFizzBuzz([[3, "Buzz"],[5, "Fizz"]], 15)`は`"BuzzFizz"`を返す必要があります。
+`genFizzBuzz([[3, "Buzz"],[5, "Fizz"]], 15)` は`"BuzzFizz"` を返す必要があります。
 
 ```js
 assert.equal(
@@ -130,7 +130,7 @@ assert.equal(
 );
 ```
 
-`genFizzBuzz([[3, "Fizz"],[5, "Buzz"],[7, "Baxx"]], 105)` は`"FizzBuzzBaxx"`を返す必要があります。
+`genFizzBuzz([[3, "Fizz"],[5, "Buzz"],[7, "Baxx"]], 105)` は `"FizzBuzzBaxx"` を返す必要があります。
 
 ```js
 assert.equal(
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/generator-exponential.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/generator-exponential.md
index d50d7cd2dc4..a52bd2fe064 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/generator-exponential.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/generator-exponential.md
@@ -12,15 +12,15 @@ A generator is an executable entity (like a function or procedure) that contains
 
 ジェネレータは、オブジェクトの内部状態が「自然に」処理されるように、しばしば、コルーチンやオブジェクトに追加して作成されます。
 
-ジェネレータは、数列が無限になる可能性がある場合、 そして最小限の状態さえあれば、数列の次の値を生成することが可能な場合によく使用されます。
+ジェネレータは、数列が無限になる可能性がある場合、そして最小限の状態さえあれば、数列の次の値を生成することが可能な場合によく使用されます。
 
 # --instructions--
 
-ジェネレータを使って正方形や立方体を生成する関数を記述してください。 正方形のジェネレータからすべての立方体をフィルタリングする新しいジェネレータを作成します。
+ジェネレータを使って平方数や立方数を生成する関数を記述してください。 平方数のジェネレータからすべての立方数をフィルタリングする新しいジェネレータを作成します。
 
-この関数は、フィルタリングされたジェネレータの \\( n^{th} \\) 値を返します。
+この関数は、フィルタリングされたジェネレータの \\( n \\) 番目の値を返します。
 
-例えば、\\(n=7\\) の場合、数列は4,9,16,25,36,49,81となるため、この関数は81を返すことになります。 ここで、64は立方体であるため除外されます。
+例えば、\\(n=7\\) の場合、数列は 4, 9, 16, 25, 36, 49, 81 となるため、この関数は 81 を返すことになります。 ここで、64 は立方数であるため除外されます。
 
 # --hints--
 
@@ -36,31 +36,31 @@ assert(typeof exponentialGenerator == 'function');
 assert(typeof exponentialGenerator(10) == 'number');
 ```
 
-`exponentialGenerator(10)` は`144`を返す必要があります。
+`exponentialGenerator(10)` は `144` を返す必要があります。
 
 ```js
 assert.equal(exponentialGenerator(10), 144);
 ```
 
-`exponentialGenerator(12)` は`196`を返す必要があります。
+`exponentialGenerator(12)` は `196` を返す必要があります。
 
 ```js
 assert.equal(exponentialGenerator(12), 196);
 ```
 
-`exponentialGenerator(14)` は`256`を返す必要があります。
+`exponentialGenerator(14)` は `256` を返す必要があります。
 
 ```js
 assert.equal(exponentialGenerator(14), 256);
 ```
 
-`exponentialGenerator(20)` は`484`を返す必要があります。
+`exponentialGenerator(20)` は `484` を返す必要があります。
 
 ```js
 assert.equal(exponentialGenerator(20), 484);
 ```
 
-`exponentialGenerator(25)` は`784`を返す必要があります。
+`exponentialGenerator(25)` は `784` を返す必要があります。
 
 ```js
 assert.equal(exponentialGenerator(25), 784);
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/greatest-subsequential-sum.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/greatest-subsequential-sum.md
index 53e5f24257c..ec092932339 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/greatest-subsequential-sum.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/greatest-subsequential-sum.md
@@ -26,13 +26,13 @@ assert(typeof maximumSubsequence == 'function');
 assert(Array.isArray(maximumSubsequence([1, 2, -1, 3, 10, -10])));
 ```
 
-`maximumSubsequence([ 1, 2, -1, 3, 10, -10 ])` は`[ 1, 2, -1, 3, 10 ]`を返す必要があります。
+`maximumSubsequence([ 1, 2, -1, 3, 10, -10 ])` は `[ 1, 2, -1, 3, 10 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(maximumSubsequence([1, 2, -1, 3, 10, -10]), [1, 2, -1, 3, 10]);
 ```
 
-`maximumSubsequence([ 0, 8, 10, -2, -4, -1, -5, -3 ])` は`[ 0, 8, 10 ]`を返す必要があります。
+`maximumSubsequence([ 0, 8, 10, -2, -4, -1, -5, -3 ])` は `[ 0, 8, 10 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(maximumSubsequence([0, 8, 10, -2, -4, -1, -5, -3]), [
@@ -42,25 +42,25 @@ assert.deepEqual(maximumSubsequence([0, 8, 10, -2, -4, -1, -5, -3]), [
 ]);
 ```
 
-`maximumSubsequence([ 9, 9, -10, 1 ])` は`[ 9, 9 ]`を返す必要があります。
+`maximumSubsequence([ 9, 9, -10, 1 ])` は `[ 9, 9 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(maximumSubsequence([9, 9, -10, 1]), [9, 9]);
 ```
 
-`maximumSubsequence([ 7, 1, -5, -3, -8, 1 ])` は`[ 7, 1 ]`を返す必要があります。
+`maximumSubsequence([ 7, 1, -5, -3, -8, 1 ])` は `[ 7, 1 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(maximumSubsequence([7, 1, -5, -3, -8, 1]), [7, 1]);
 ```
 
-`maximumSubsequence([ -3, 6, -1, 4, -4, -6 ])` は `[ 6, -1, 4 ]`を返す必要があります。
+`maximumSubsequence([ -3, 6, -1, 4, -4, -6 ])` は `[ 6, -1, 4 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(maximumSubsequence([-3, 6, -1, 4, -4, -6]), [6, -1, 4]);
 ```
 
-`maximumSubsequence([ -1, -2, 3, 5, 6, -2, -1, 4, -4, 2, -1 ])` は`[ 3, 5, 6, -2, -1, 4 ]`を返す必要があります。
+`maximumSubsequence([ -1, -2, 3, 5, 6, -2, -1, 4, -4, 2, -1 ])` は `[ 3, 5, 6, -2, -1, 4 ]` を返す必要があります。
 
 ```js
 assert.deepEqual(maximumSubsequence([-1, -2, 3, 5, 6, -2, -1, 4, -4, 2, -1]), [
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/hailstone-sequence.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/hailstone-sequence.md
index 23ef9f4a670..6687f040c92 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/hailstone-sequence.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/hailstone-sequence.md
@@ -16,7 +16,7 @@ The Hailstone sequence of numbers can be generated from a starting positive inte
 
 コラッツの予想 (証明されていない) では、初期値が何であれ、ヘイルストーンシーケンスは常に終了するとされています。
 
-ヘイルストーンシーケンスは、ヘイルストーン数としても知られています (値が通常は雲の中の雹 (ヘイルストーン) のように何度も上下するためです)。 あるいはコラッツ数列とも呼ばれます。
+ヘイルストーンシーケンスは、ヘイルストーン数としても知られています (値が通常は雲の中の雹 (ヘイルストーン) のように何度も上下するためです)。あるいはコラッツ数列とも呼ばれます。
 
 # --instructions--
 
@@ -37,19 +37,19 @@ assert(typeof hailstoneSequence === 'function');
 assert(Array.isArray(hailstoneSequence(30)));
 ```
 
-`hailstoneSequence(30)` は`[27, 112]`を返す必要があります。
+`hailstoneSequence(30)` は `[27, 112]` を返す必要があります。
 
 ```js
 assert.deepEqual(hailstoneSequence(30), [27, 112]);
 ```
 
-`hailstoneSequence(50000)` は`[35655, 324]`を返す必要があります。
+`hailstoneSequence(50000)` は `[35655, 324]` を返す必要があります。
 
 ```js
 assert.deepEqual(hailstoneSequence(50000), [35655, 324]);
 ```
 
-`hailstoneSequence(100000)` は`[77031, 351]`を返す必要があります。
+`hailstoneSequence(100000)` は `[77031, 351]` を返す必要があります。
 
 ```js
 assert.deepEqual(hailstoneSequence(100000), [77031, 351]);
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/hofstadter-q-sequence.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/hofstadter-q-sequence.md
index f445a996ce9..9053fe8b446 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/hofstadter-q-sequence.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/hofstadter-q-sequence.md
@@ -12,11 +12,11 @@ The Hofstadter Q sequence is defined as:
 
 $Q(1)=Q(2)=1, \\\\ Q(n)=Q\\big(n-Q(n-1)\\big)+Q\\big(n-Q(n-2)), \\quad n>2.$
 
-これはフィボナッチ数列の定義に似ていますが、 フィボナッチ数列の次の項が前の 2 つの項の合計であるのに対し、Q 数列では、前の 2 つの項は、次の項の作成に必要となる合計する 2 つの数字を見つけるために Q 数列内で戻る距離を示しています。
+これはフィボナッチ数列の定義に似ていますが、フィボナッチ数列の次の項が前の 2 つの項の合計であるのに対し、Q 数列では、前の 2 つの項は、次の項の作成に必要となる合計する 2 つの数字を見つけるために Q 数列内で戻る距離を示しています。
 
 # --instructions--
 
-ホフスタッター Q 数列方程式を関数として作成してください。 この関数は、数値`n`を受け取り、整数を返します。
+ホフスタッター Q 数列方程式を関数として作成してください。 この関数は、数値 `n` を受け取り、整数を返します。
 
 # --hints--
 
@@ -26,31 +26,31 @@ $Q(1)=Q(2)=1, \\\\ Q(n)=Q\\big(n-Q(n-1)\\big)+Q\\big(n-Q(n-2)), \\quad n>2.$
 assert(typeof hofstadterQ === 'function');
 ```
 
-`hofstadterQ()` は`integer`を返す必要があります。
+`hofstadterQ()` は `integer` を返す必要があります。
 
 ```js
 assert(Number.isInteger(hofstadterQ(1000)));
 ```
 
-`hofstadterQ(1000)` は`502`を返す必要があります。
+`hofstadterQ(1000)` は `502` を返す必要があります。
 
 ```js
 assert.equal(hofstadterQ(testCase[0]), res[0]);
 ```
 
-`hofstadterQ(1500)` は`755`を返す必要があります。
+`hofstadterQ(1500)` は `755` を返す必要があります。
 
 ```js
 assert.equal(hofstadterQ(testCase[1]), res[1]);
 ```
 
-`hofstadterQ(2000)` は `1005`を返す必要があります。
+`hofstadterQ(2000)` は `1005` を返す必要があります。
 
 ```js
 assert.equal(hofstadterQ(testCase[2]), res[2]);
 ```
 
-`hofstadterQ(2500)` は`1261`を返す必要があります。
+`hofstadterQ(2500)` は `1261` を返す必要があります。
 
 ```js
 assert.equal(hofstadterQ(testCase[3]), res[3]);
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/iterated-digits-squaring.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/iterated-digits-squaring.md
index 4c4746239e5..6a18ce8e442 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/iterated-digits-squaring.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/iterated-digits-squaring.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7ec1
-title: 各位の2乗を繰り返す
+title: 各位の 2 乗を繰り返す
 challengeType: 1
 forumTopicId: 302291
 dashedName: iterated-digits-squaring
@@ -32,37 +32,37 @@ assert(typeof iteratedSquare == 'function');
 assert(typeof iteratedSquare(4) == 'number');
 ```
 
-`iteratedSquare(4)` は`89`を返す必要があります。
+`iteratedSquare(4)` は `89` を返す必要があります。
 
 ```js
 assert.equal(iteratedSquare(4), 89);
 ```
 
-`iteratedSquare(7)` は`1`を返す必要があります。
+`iteratedSquare(7)` は `1` を返す必要があります。
 
 ```js
 assert.equal(iteratedSquare(7), 1);
 ```
 
-`iteratedSquare(15)` は`89`を返す必要があります。
+`iteratedSquare(15)` は `89` を返す必要があります。
 
 ```js
 assert.equal(iteratedSquare(15), 89);
 ```
 
-`iteratedSquare(20)` は`89`を返す必要があります。
+`iteratedSquare(20)` は `89` を返す必要があります。
 
 ```js
 assert.equal(iteratedSquare(20), 89);
 ```
 
-`iteratedSquare(70)`は`1`を返す必要があります。
+`iteratedSquare(70)` は `1` を返す必要があります。
 
 ```js
 assert.equal(iteratedSquare(70), 1);
 ```
 
-`iteratedSquare(100)` は`1`を返す必要があります。
+`iteratedSquare(100)` は `1` を返す必要があります。
 
 ```js
 assert.equal(iteratedSquare(100), 1);
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/josephus-problem.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/josephus-problem.md
index 6b7d4804b13..4f407ed81d7 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/josephus-problem.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/josephus-problem.md
@@ -14,11 +14,11 @@ Josephus problem is a math puzzle with a grim description: $n$ prisoners are sta
 
 死刑の執行が進むにつれ円はどんどん小さくなっていき、最後の1人は釈放されます。
 
-例えば、 $n=5$ 人の囚人がおり、 $k=2$ の場合、囚人が処刑される順番 (「執行シーケンス」と呼ぶことにしましょう) は 1、3、0、4 となり、釈放されるのは 2 番の囚人になります。
+例えば、$n=5$ 人の囚人がおり、$k=2$ の場合、囚人が処刑される順番 (「執行シーケンス」と呼ぶことにしましょう) は 1、3、0、4 となり、釈放されるのは 2 番の囚人になります。
 
 任意の $n, k > 0$ が与えられた場合に、どの囚人が最後に生き残るかを求めてみましょう。
 
-このような例の 1 つに、囚人が41 人で、3<sup>rd</sup> 番目の囚人ごとに処刑された ($k=3$) という出来事があります。
+このような例の 1 つに、囚人が 41 人で、3 番目の囚人ごとに処刑された ($k=3$) という出来事があります。
 
 そのうちの 1 人がこの問題を解いたヨセフスという賢い人物で、最終的に生き残り、この物語を語り継ぎました。
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-unbounded.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-unbounded.md
index 6309eda4e7a..49cbc90da8d 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-unbounded.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-unbounded.md
@@ -18,7 +18,7 @@ A traveler gets diverted and has to make an unscheduled stop in what turns out t
 
 # --instructions--
 
-オブジェクトの配列、最大重量、最大容量をパラメータとして取る関数を記述してください。 各オブジェクトには アイテム名、価値、重量、容量の 4 つの属性があります。 この関数は、旅人が持っていくことのできるアイテムの価値の最大値を返さなければなりません。
+オブジェクトの配列、最大重量、最大容量をパラメータとして取る関数を記述してください。 各オブジェクトには、アイテム名、価値、重量、容量の 4 つの属性があります。 この関数は、旅人が持っていくことのできるアイテムの価値の最大値を返さなければなりません。
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/ludic-numbers.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/ludic-numbers.md
index d0c746a7a83..5c36c4f3683 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/ludic-numbers.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/ludic-numbers.md
@@ -10,7 +10,7 @@ dashedName: ludic-numbers
 
 Ludic numbers are related to prime numbers as they are generated by a sieve quite like the Sieve of Eratosthenes is used to generate prime numbers.
 
-最初のルディック数は1です。
+最初のルディック数は 1 です。
 
 続けてルディック数を生成するために、2 から開始し、増加していく整数の配列を作成します。
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/luhn-test-of-credit-card-numbers.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/luhn-test-of-credit-card-numbers.md
index a825cbb2887..1ed016fa71d 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/luhn-test-of-credit-card-numbers.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/luhn-test-of-credit-card-numbers.md
@@ -23,7 +23,7 @@ Luhnテストで検証可能なクレジットカード番号を使用してい
   <li>s1 + s2 の答がゼロで終わる場合、元の番号は Luhn テストで検証された有効なクレジットカード番号の形式となっています。</li>
 </ol>
 
-たとえば、トライアル番号が 49927398716の場合:
+たとえば、トライアル番号が 49927398716 の場合:
 
 ```bash
 Reverse the digits:
@@ -44,7 +44,7 @@ s1 + s2 = 70 which ends in zero which means that 49927398716 passes the Luhn tes
 
 # --instructions--
 
-Luhnテストで数値を検証する関数を記述してください。 有効な数値の場合は true を返します。 それ以外は、falseを返します。
+Luhn テストで数値を検証する関数を記述してください。 有効な数値の場合は true を返します。 それ以外は、false を返します。
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/lychrel-numbers.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/lychrel-numbers.md
index 145edf5f1dd..f9c43135254 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/lychrel-numbers.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/lychrel-numbers.md
@@ -16,7 +16,7 @@ dashedName: lychrel-numbers
 
 The above recurrence relation when applied to most starting numbers `n` = 1, 2, ... terminates in a palindrome quite quickly.
 
-例えば、 `n₀` = 12 の場合、以下のようになります。
+例えば、`n₀` = 12 の場合、以下のようになります。
 
 ```bash
 12
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/s-expressions.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/s-expressions.md
index ca594d3d667..1e1da07cd57 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/s-expressions.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/s-expressions.md
@@ -1,6 +1,6 @@
 ---
 id: 59667989bf71cf555dd5d2ff
-title: S式
+title: S 式
 challengeType: 1
 forumTopicId: 302303
 dashedName: s-expressions
@@ -12,15 +12,15 @@ dashedName: s-expressions
 
 # --instructions--
 
-引用符付きおよび引用符無しの文字列、整数、浮動小数点数を扱う S 式の単純なリーダー/パーサーを記述してください。
+引用符付きおよび引用符無しの文字列、整数、浮動小数点数を扱う S 式の単純なリーダー / パーサーを記述してください。
 
-この関数は、文字列から単一であるが入れ子になったS式を読み込み、(ネストされた) 配列として返さなければなりません。
+この関数は、文字列から単一であるが入れ子になった S 式を読み込み、(ネストされた) 配列として返さなければなりません。
 
 引用符付き文字列に含まれない限り、改行やその他の空白は無視することができます。
 
 引用符付き文字列内の "`()`" は解釈されず、文字列の一部として扱われます。
 
-文字列内でエスケープ処理された引用符を扱うことは任意です。 従って、"`(foo"bar)`" は文字列 "`foo"bar`" として扱われるか、エラーとして扱われる可能性があります。
+文字列内でエスケープ処理された引用符を扱うことは任意です。従って、"`(foo"bar)`" は文字列 "`foo"bar`" として扱われるか、エラーとして扱われる可能性があります。
 
 このため、リーダーはエスケープ処理のために `\` を認識する必要はありませんが、言語に適切なデータ型がある場合には、数値の認識も必要です。
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/search-a-list-of-records.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/search-a-list-of-records.md
index dee69c49a83..1be384139a8 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/search-a-list-of-records.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/search-a-list-of-records.md
@@ -12,7 +12,7 @@ A record consists of attributes that describe an entity. Each attribute has a na
 
 # --instructions--
 
-パラメータとして文字列を取る関数を記述してください。 この関数は、`name` 属性の値が指定された文字列と一致する `list`内の項目のインデックスを返す必要があります。
+パラメータとして文字列を取る関数を記述してください。 この関数は、`name` 属性の値が指定された文字列と一致する `list` 内の項目のインデックスを返す必要があります。
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/sort-disjoint-sublist.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/sort-disjoint-sublist.md
index d84008456e2..197eee3daf1 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/sort-disjoint-sublist.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/sort-disjoint-sublist.md
@@ -20,7 +20,7 @@ indices(0-based): {6, 1, 7}
 
 正しい結果は次のとおりです。
 
-<code>[7, <b>0</b>, 5, 4, 3, 2, <b>1</b>, <b>6</b>]</code>.
+<code>[7, <b>0</b>, 5, 4, 3, 2, <b>1</b>, <b>6</b>]</code>
 
 # --hints--
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/sort-stability.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/sort-stability.md
index e06455750c6..1070e515902 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/sort-stability.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/sort-stability.md
@@ -10,7 +10,7 @@ dashedName: sort-stability
 
 When sorting records in a table by a particular column or field, a <a href="https://www.freecodecamp.org/news/stability-in-sorting-algorithms-a-treatment-of-equality-fa3140a5a539/" target="_blank" rel="noopener noreferrer nofollow">stable sort</a> will always retain the relative order of records that have the same key.
 
-例えば、この国と都市の表で **2 番目**の列の都市で安定ソートを行うと、米国のバーミンガムが英国のバーミンガムの上という順序が保たれます。 (このケースでは、不安定ソートでも米国のバーミンガムが英国のバーミンガムの上に配置される*可能性*はありますが、安定ソートのルーチンはそれを*保証*します）。
+例えば、この国と都市の表で **2 番目**の列の都市で安定ソートを行うと、米国のバーミンガムが英国のバーミンガムの上という順序が保たれます。 (このケースでは、不安定ソートでも米国のバーミンガムが英国のバーミンガムの上に配置される*可能性*はありますが、安定ソートのルーチンはそれを*保証*します)。
 
 <pre>UK  London
 US  New York
@@ -18,7 +18,7 @@ US  Birmingham
 UK  Birmingham
 </pre>
 
-同様に 最初の列だけに安定ソートを行うと、最初の項目として「UK London」が、最後の項目として「US Birmingham」が来ます (同じ最初の単語 – 「UK」または「US」 – を持つ要素の順序が維持されるため)。
+同様に 最初の列だけに安定ソートを行うと、最初の項目として「UK London」が、最後の項目として「US Birmingham」が来ます (同じ最初の単語 –「UK」または「US」– を持つ要素の順序が維持されるため)。
 
 # --instructions--
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/sum-to-100.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/sum-to-100.md
index 8f7b5453217..56462e5730a 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/sum-to-100.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/sum-to-100.md
@@ -10,7 +10,7 @@ dashedName: sum-to-100
 
 Find solutions to the *sum to one hundred* puzzle.
 
-10進数の文字列 ** 123456789 ** の任意の桁の前に、数学演算子の **+**または**─** (プラスまたはマイナス) を追加 (挿入) し、結果の数式の合計が特定の値 (この象徴的なケースでは、**100**) になるようにします。
+10進数の文字列 ** 123456789 ** の任意の桁の前に、数学演算子の **+** または**─** (プラスまたはマイナス) を追加 (挿入) し、結果の数式の合計が特定の値 (この象徴的なケースでは、**100**) になるようにします。
 
 例:
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/taxicab-numbers.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/taxicab-numbers.md
index 8cffabfbce8..a419d505a5f 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/taxicab-numbers.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/taxicab-numbers.md
@@ -10,11 +10,11 @@ dashedName: taxicab-numbers
 
 A taxicab number (the definition that is being used here) is a positive integer that can be expressed as the sum of two positive cubes in more than one way.
 
-最初のタクシー数は `1729`で、次のようになります:
+最初のタクシー数は `1729`です。これは:
 
 1<sup>3</sup> + 12<sup>3</sup> および
 
-9<sup>3</sup> + 10<sup>3</sup>.
+9<sup>3</sup> + 10<sup>3</sup> と表せます。
 
 タクシー数には、次のような呼び方もあります:
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/topological-sort.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/topological-sort.md
index 3717288ac93..652a853b7db 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/topological-sort.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/topological-sort.md
@@ -8,13 +8,13 @@ dashedName: topological-sort
 
 # --description--
 
-Given a mapping between items, and items they depend on, a topological sort orders items so that no item precedes an item it depends upon. There are two popular algorithms for topological sorting: Kahn's (1962) topological sort and depth-first search.
+項目間のマッピングが与えられ、項目間に依存関係があるとき、トポロジカルソートは、項目がその依存している項目に先行しないように項目を並べます。 トポロジカルソートには、カーン (1962年) のトポロジカルソートと、深さ優先探索という、2 つの一般的なアルゴリズムがあります。
 
 # --instructions--
 
-依存関係からのライブラリの有効なコンパイル順でリストを返す関数を記述してください。
+依存関係から、有効なコンパイル順でライブラリのリストを返す関数を記述してください。
 
-- Assume library names are single words.
+- ライブラリ名は 1 つの単語とします。
 - 依存する側としてのみ記載されている項目には、自身に依存している項目はありませんが、そのコンパイル順は規定される必要があります。
 - 自己依存関係はすべて無視する必要があります。
 - 順序付けできない依存関係はすべて無視する必要があります。
@@ -39,7 +39,7 @@ std_cell_lib     ieee std_cell_lib
 synopsys
 </pre>
 
-VHDL言語のライブラリのコンパイルには、ライブラリが依存するライブラリの後にコンパイルされなければならないという制約があります。 例えば、 `dw04` が `dw01`の依存関係のリストに追加された場合、上記のデータは順序不能になります。
+VHDL 言語のライブラリのコンパイルには、ライブラリが依存するライブラリの後にコンパイルされなければならないという制約があります。 例えば、`dw04` が `dw01` の依存関係のリストに追加された場合、上記のデータは順序付け不可能になります。
 
 関数の入力は複数行の文字列になります。それぞれの行はライブラリの名前で構成され、それに依存しているもの (存在する場合) が続きます。
 
diff --git a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/zig-zag-matrix.md b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/zig-zag-matrix.md
index 78869abf8b4..9c3ccdb0dc8 100644
--- a/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/zig-zag-matrix.md
+++ b/curriculum/challenges/japanese/22-rosetta-code/rosetta-code-challenges/zig-zag-matrix.md
@@ -10,7 +10,7 @@ dashedName: zig-zag-matrix
 
 A 'zig-zag' array is a square arrangement of the first $N^2$ integers, where the numbers increase sequentially as you zig-zag along the array's anti-diagonals.
 
-例えば、入力 `5`の場合、次の結果となります。
+例えば、入力 `5` の場合、次の結果となります。
 
 <pre>
  0  1  5  6 14
diff --git a/curriculum/challenges/japanese/23-python-for-everybody/python-for-everybody/dictionaries-and-loops.md b/curriculum/challenges/japanese/23-python-for-everybody/python-for-everybody/dictionaries-and-loops.md
index ac686e59c03..a86a0611b45 100644
--- a/curriculum/challenges/japanese/23-python-for-everybody/python-for-everybody/dictionaries-and-loops.md
+++ b/curriculum/challenges/japanese/23-python-for-everybody/python-for-everybody/dictionaries-and-loops.md
@@ -46,7 +46,7 @@ jan 100</pre>
 
 ---
 
-<pre>[エラー]</pre>
+<pre>[Error]</pre>
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/korean/00-certifications/a2-english-for-developers-certification/a2-english-for-developers-certification.yml b/curriculum/challenges/korean/00-certifications/a2-english-for-developers-certification/a2-english-for-developers-certification.yml
index 832dd23b1e6..3ea323ff9d9 100644
--- a/curriculum/challenges/korean/00-certifications/a2-english-for-developers-certification/a2-english-for-developers-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/a2-english-for-developers-certification/a2-english-for-developers-certification.yml
@@ -5,5 +5,6 @@ certification: a2-english-for-developers
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 651dd3e06ffb500e3f2ce478
+  - 
+    id: 651dd3e06ffb500e3f2ce478
     title: Challenge 1
diff --git a/curriculum/challenges/korean/00-certifications/back-end-development-and-apis-certification/back-end-development-and-apis-certification.yml b/curriculum/challenges/korean/00-certifications/back-end-development-and-apis-certification/back-end-development-and-apis-certification.yml
index 7f5e0d2ddf5..d020e8c1e58 100644
--- a/curriculum/challenges/korean/00-certifications/back-end-development-and-apis-certification/back-end-development-and-apis-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/back-end-development-and-apis-certification/back-end-development-and-apis-certification.yml
@@ -5,13 +5,18 @@ certification: back-end-development-and-apis
 challengeType: 7
 isPrivate: true
 tests:
-  - id: bd7158d8c443edefaeb5bdef
+  - 
+    id: bd7158d8c443edefaeb5bdef
     title: Timestamp Microservice
-  - id: bd7158d8c443edefaeb5bdff
+  - 
+    id: bd7158d8c443edefaeb5bdff
     title: Request Header Parser Microservice
-  - id: bd7158d8c443edefaeb5bd0e
+  - 
+    id: bd7158d8c443edefaeb5bd0e
     title: URL Shortener Microservice
-  - id: 5a8b073d06fa14fcfde687aa
+  - 
+    id: 5a8b073d06fa14fcfde687aa
     title: Exercise Tracker
-  - id: bd7158d8c443edefaeb5bd0f
+  - 
+    id: bd7158d8c443edefaeb5bd0f
     title: File Metadata Microservice
diff --git a/curriculum/challenges/korean/00-certifications/college-algebra-with-python-certification/college-algebra-with-python-certification.yml b/curriculum/challenges/korean/00-certifications/college-algebra-with-python-certification/college-algebra-with-python-certification.yml
index 67c48ceb609..707d18c0493 100644
--- a/curriculum/challenges/korean/00-certifications/college-algebra-with-python-certification/college-algebra-with-python-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/college-algebra-with-python-certification/college-algebra-with-python-certification.yml
@@ -5,13 +5,18 @@ certification: college-algebra-with-python
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 63d83ff239c73468b059cd3f
+  - 
+    id: 63d83ff239c73468b059cd3f
     title: Build a Multi-Function Calculator
-  - id: 63d83ffd39c73468b059cd40
+  - 
+    id: 63d83ffd39c73468b059cd40
     title: Build a Graphing Calculator
-  - id: 63d8401039c73468b059cd41
+  - 
+    id: 63d8401039c73468b059cd41
     title: Build Three Math Games
-  - id: 63d8401e39c73468b059cd42
+  - 
+    id: 63d8401e39c73468b059cd42
     title: Build a Financial Calculator
-  - id: 63d8402e39c73468b059cd43
-    title: Build a Data Graph Explorer
\ No newline at end of file
+  - 
+    id: 63d8402e39c73468b059cd43
+    title: Build a Data Graph Explorer
diff --git a/curriculum/challenges/korean/00-certifications/data-analysis-with-python-certification/data-analysis-with-python-certification.yml b/curriculum/challenges/korean/00-certifications/data-analysis-with-python-certification/data-analysis-with-python-certification.yml
index e4c1a13ad03..a9a8bfc5347 100644
--- a/curriculum/challenges/korean/00-certifications/data-analysis-with-python-certification/data-analysis-with-python-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/data-analysis-with-python-certification/data-analysis-with-python-certification.yml
@@ -1,17 +1,23 @@
+---
 id: 5e46fc95ac417301a38fb934
 title: Data Analysis with Python Certification
 certification: data-analysis-with-python
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 5e46f7e5ac417301a38fb928
+  - 
+    id: 5e46f7e5ac417301a38fb928
     title: Mean-Variance-Standard Deviation Calculator
-  - id: 5e46f7e5ac417301a38fb929
+  - 
+    id: 5e46f7e5ac417301a38fb929
     title: Demographic Data Analyzer
-  - id: 5e46f7f8ac417301a38fb92a
+  - 
+    id: 5e46f7f8ac417301a38fb92a
     title: Medical Data Visualizer
-  - id: 5e46f802ac417301a38fb92b
+  - 
+    id: 5e46f802ac417301a38fb92b
     title: Page View Time Series Visualizer
-  - id: 5e4f5c4b570f7e3a4949899f
+  - 
+    id: 5e4f5c4b570f7e3a4949899f
     title: Sea Level Predictor
 
diff --git a/curriculum/challenges/korean/00-certifications/data-visualization-certification/data-visualization-certification.yml b/curriculum/challenges/korean/00-certifications/data-visualization-certification/data-visualization-certification.yml
index 2ec1d9efe61..e6778c15571 100644
--- a/curriculum/challenges/korean/00-certifications/data-visualization-certification/data-visualization-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/data-visualization-certification/data-visualization-certification.yml
@@ -1,16 +1,22 @@
+---
 id: 5a553ca864b52e1d8bceea14
 title: Data Visualization Certification
 certification: data-visualization
 challengeType: 7
 isPrivate: true
 tests:
-  - id: bd7168d8c242eddfaeb5bd13
+  - 
+    id: bd7168d8c242eddfaeb5bd13
     title: Visualize Data with a Bar Chart
-  - id: bd7178d8c242eddfaeb5bd13
+  - 
+    id: bd7178d8c242eddfaeb5bd13
     title: Visualize Data with a Scatterplot Graph
-  - id: bd7188d8c242eddfaeb5bd13
+  - 
+    id: bd7188d8c242eddfaeb5bd13
     title: Visualize Data with a Heat Map
-  - id: 587d7fa6367417b2b2512bbf
+  - 
+    id: 587d7fa6367417b2b2512bbf
     title: Visualize Data with a Choropleth Map
-  - id: 587d7fa6367417b2b2512bc0
+  - 
+    id: 587d7fa6367417b2b2512bc0
     title: Visualize Data with a Treemap Diagram
diff --git a/curriculum/challenges/korean/00-certifications/example-certification/example-certifcation.yml b/curriculum/challenges/korean/00-certifications/example-certification/example-certifcation.yml
index b63efaa2cf3..e887e489d8b 100644
--- a/curriculum/challenges/korean/00-certifications/example-certification/example-certifcation.yml
+++ b/curriculum/challenges/korean/00-certifications/example-certification/example-certifcation.yml
@@ -5,5 +5,6 @@ certification: example-certification
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 645147516c245de4d11eb7ba
+  - 
+    id: 645147516c245de4d11eb7ba
     title: Certification Exam
diff --git a/curriculum/challenges/korean/00-certifications/foundational-c-sharp-with-microsoft-certification/foundational-c-sharp-with-microsoft.yml b/curriculum/challenges/korean/00-certifications/foundational-c-sharp-with-microsoft-certification/foundational-c-sharp-with-microsoft.yml
index e9a6c51d0fe..a145a188e77 100644
--- a/curriculum/challenges/korean/00-certifications/foundational-c-sharp-with-microsoft-certification/foundational-c-sharp-with-microsoft.yml
+++ b/curriculum/challenges/korean/00-certifications/foundational-c-sharp-with-microsoft-certification/foundational-c-sharp-with-microsoft.yml
@@ -1,9 +1,10 @@
 ---
 id: 647f7da207d29547b3bee1ba
-title: Foundational C# with Microsoft Certification
+title: 'Foundational C# with Microsoft Certification'
 certification: foundational-c-sharp-with-microsoft
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 647e22d18acb466c97ccbef8
-    title: Foundational C# with Microsoft Certification Exam
+  - 
+    id: 647e22d18acb466c97ccbef8
+    title: 'Foundational C# with Microsoft Certification Exam'
diff --git a/curriculum/challenges/korean/00-certifications/front-end-development-libraries-certification/front-end-development-libraries-certification.yml b/curriculum/challenges/korean/00-certifications/front-end-development-libraries-certification/front-end-development-libraries-certification.yml
index 408e57078d9..adacd42f16b 100644
--- a/curriculum/challenges/korean/00-certifications/front-end-development-libraries-certification/front-end-development-libraries-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/front-end-development-libraries-certification/front-end-development-libraries-certification.yml
@@ -5,13 +5,18 @@ certification: front-end-development-libraries
 challengeType: 7
 isPrivate: true
 tests:
-  - id: bd7158d8c442eddfaeb5bd13
+  - 
+    id: bd7158d8c442eddfaeb5bd13
     title: Build a Random Quote Machine
-  - id: bd7157d8c242eddfaeb5bd13
+  - 
+    id: bd7157d8c242eddfaeb5bd13
     title: Build a Markdown Previewer
-  - id: 587d7dbc367417b2b2512bae
+  - 
+    id: 587d7dbc367417b2b2512bae
     title: Build a Drum Machine
-  - id: bd7158d8c442eddfaeb5bd17
+  - 
+    id: bd7158d8c442eddfaeb5bd17
     title: Build a JavaScript Calculator
-  - id: bd7158d8c442eddfaeb5bd0f
+  - 
+    id: bd7158d8c442eddfaeb5bd0f
     title: Build a 25 + 5 Clock
diff --git a/curriculum/challenges/korean/00-certifications/information-security-certification/information-security-certification.yml b/curriculum/challenges/korean/00-certifications/information-security-certification/information-security-certification.yml
index 8997cfbb352..7511aa0f18c 100644
--- a/curriculum/challenges/korean/00-certifications/information-security-certification/information-security-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/information-security-certification/information-security-certification.yml
@@ -1,16 +1,22 @@
+---
 id: 5e6021435ac9d0ecd8b94b00
 title: Information Security Certification
 certification: information-security
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 587d824a367417b2b2512c44
+  - 
+    id: 587d824a367417b2b2512c44
     title: Stock Price Checker
-  - id: 587d824a367417b2b2512c45
+  - 
+    id: 587d824a367417b2b2512c45
     title: Anonymous Message Board
-  - id: 5e46f979ac417301a38fb932
+  - 
+    id: 5e46f979ac417301a38fb932
     title: Port Scanner
-  - id: 5e46f983ac417301a38fb933
+  - 
+    id: 5e46f983ac417301a38fb933
     title: SHA-1 Password Cracker
-  - id: 5e601c775ac9d0ecd8b94aff
+  - 
+    id: 5e601c775ac9d0ecd8b94aff
     title: Secure Real Time Multiplayer Game
diff --git a/curriculum/challenges/korean/00-certifications/javascript-algorithms-and-data-structures-certification/javascript-algorithms-and-data-structures-certification.yml b/curriculum/challenges/korean/00-certifications/javascript-algorithms-and-data-structures-certification/javascript-algorithms-and-data-structures-certification.yml
index 63885637466..1a59f5ddb70 100644
--- a/curriculum/challenges/korean/00-certifications/javascript-algorithms-and-data-structures-certification/javascript-algorithms-and-data-structures-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/javascript-algorithms-and-data-structures-certification/javascript-algorithms-and-data-structures-certification.yml
@@ -1,16 +1,22 @@
+---
 id: 561abd10cb81ac38a17513bc
 title: JavaScript Algorithms and Data Structures Certification
 certification: javascript-algorithms-and-data-structures
 challengeType: 7
 isPrivate: true
 tests:
-  - id: aaa48de84e1ecc7c742e1124
+  - 
+    id: aaa48de84e1ecc7c742e1124
     title: Palindrome Checker
-  - id: a7f4d8f2483413a6ce226cac
+  - 
+    id: a7f4d8f2483413a6ce226cac
     title: Roman Numeral Converter
-  - id: 56533eb9ac21ba0edf2244e2
+  - 
+    id: 56533eb9ac21ba0edf2244e2
     title: Caesars Cipher
-  - id: aff0395860f5d3034dc0bfc9
+  - 
+    id: aff0395860f5d3034dc0bfc9
     title: Telephone Number Validator
-  - id: aa2e6f85cab2ab736c9a9b24
+  - 
+    id: aa2e6f85cab2ab736c9a9b24
     title: Cash Register
diff --git a/curriculum/challenges/korean/00-certifications/javascript-algorithms-and-data-structures-v8/javascript-algorithms-and-data-structures-certification-v8.yml b/curriculum/challenges/korean/00-certifications/javascript-algorithms-and-data-structures-v8/javascript-algorithms-and-data-structures-certification-v8.yml
index 2cc53ddfb75..90d4241ee79 100644
--- a/curriculum/challenges/korean/00-certifications/javascript-algorithms-and-data-structures-v8/javascript-algorithms-and-data-structures-certification-v8.yml
+++ b/curriculum/challenges/korean/00-certifications/javascript-algorithms-and-data-structures-v8/javascript-algorithms-and-data-structures-certification-v8.yml
@@ -4,13 +4,18 @@ certification: javascript-algorithms-and-data-structures-v8
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 657bdc55a322aae1eac3838f
+  - 
+    id: 657bdc55a322aae1eac3838f
     title: Build a Palindrome Checker
-  - id: 657bdc8ba322aae1eac38390
+  - 
+    id: 657bdc8ba322aae1eac38390
     title: Build a Roman Numeral Converter
-  - id: 657bdcb9a322aae1eac38391
+  - 
+    id: 657bdcb9a322aae1eac38391
     title: Build a Telephone Number Validator
-  - id: 657bdcc3a322aae1eac38392
+  - 
+    id: 657bdcc3a322aae1eac38392
     title: Build a Cash Register
-  - id: 6555c1d3e11a1574434cf8b5
+  - 
+    id: 6555c1d3e11a1574434cf8b5
     title: Build a Pokémon Search App
diff --git a/curriculum/challenges/korean/00-certifications/legacy-back-end-certification/legacy-back-end-certification.yml b/curriculum/challenges/korean/00-certifications/legacy-back-end-certification/legacy-back-end-certification.yml
index 8a792c1b393..74e0124d015 100644
--- a/curriculum/challenges/korean/00-certifications/legacy-back-end-certification/legacy-back-end-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/legacy-back-end-certification/legacy-back-end-certification.yml
@@ -1,26 +1,37 @@
+---
 id: 660add10cb82ac38a17513be
 title: Legacy Back End Certification
 certification: legacy-back-end
 challengeType: 7
 isPrivate: true
 tests:
-  - id: bd7158d8c443edefaeb5bdef
+  - 
+    id: bd7158d8c443edefaeb5bdef
     title: Timestamp Microservice
-  - id: bd7158d8c443edefaeb5bdff
+  - 
+    id: bd7158d8c443edefaeb5bdff
     title: Request Header Parser Microservice
-  - id: bd7158d8c443edefaeb5bd0e
+  - 
+    id: bd7158d8c443edefaeb5bd0e
     title: URL Shortener Microservice
-  - id: bd7158d8c443edefaeb5bdee
+  - 
+    id: bd7158d8c443edefaeb5bdee
     title: Image Search Abstraction Layer
-  - id: bd7158d8c443edefaeb5bd0f
+  - 
+    id: bd7158d8c443edefaeb5bd0f
     title: File Metadata Microservice
-  - id: bd7158d8c443eddfaeb5bdef
+  - 
+    id: bd7158d8c443eddfaeb5bdef
     title: Build a Voting App
-  - id: bd7158d8c443eddfaeb5bdff
+  - 
+    id: bd7158d8c443eddfaeb5bdff
     title: Build a Nightlife Coordination App
-  - id: bd7158d8c443eddfaeb5bd0e
+  - 
+    id: bd7158d8c443eddfaeb5bd0e
     title: Chart the Stock Market
-  - id: bd7158d8c443eddfaeb5bd0f
+  - 
+    id: bd7158d8c443eddfaeb5bd0f
     title: Manage a Book Trading Club
-  - id: bd7158d8c443eddfaeb5bdee
+  - 
+    id: bd7158d8c443eddfaeb5bdee
     title: Build a Pinterest Clone
diff --git a/curriculum/challenges/korean/00-certifications/legacy-data-visualization-certification/legacy-data-visualization-certification.yml b/curriculum/challenges/korean/00-certifications/legacy-data-visualization-certification/legacy-data-visualization-certification.yml
index 69845d6c652..3d6f8df0618 100644
--- a/curriculum/challenges/korean/00-certifications/legacy-data-visualization-certification/legacy-data-visualization-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/legacy-data-visualization-certification/legacy-data-visualization-certification.yml
@@ -1,26 +1,37 @@
+---
 id: 561add10cb82ac39a17513bc
 title: Legacy Data Visualization Certification
 certification: legacy-data-visualization
 challengeType: 7
 isPrivate: true
 tests:
-  - id: bd7157d8c242eddfaeb5bd13
+  - 
+    id: bd7157d8c242eddfaeb5bd13
     title: Build a Markdown Previewer
-  - id: bd7156d8c242eddfaeb5bd13
+  - 
+    id: bd7156d8c242eddfaeb5bd13
     title: Build a Camper Leaderboard
-  - id: bd7155d8c242eddfaeb5bd13
+  - 
+    id: bd7155d8c242eddfaeb5bd13
     title: Build a Recipe Box
-  - id: bd7154d8c242eddfaeb5bd13
+  - 
+    id: bd7154d8c242eddfaeb5bd13
     title: Build the Game of Life
-  - id: bd7153d8c242eddfaeb5bd13
+  - 
+    id: bd7153d8c242eddfaeb5bd13
     title: Build a Roguelike Dungeon Crawler Game
-  - id: bd7168d8c242eddfaeb5bd13
+  - 
+    id: bd7168d8c242eddfaeb5bd13
     title: Visualize Data with a Bar Chart
-  - id: bd7178d8c242eddfaeb5bd13
+  - 
+    id: bd7178d8c242eddfaeb5bd13
     title: Visualize Data with a Scatterplot Graph
-  - id: bd7188d8c242eddfaeb5bd13
+  - 
+    id: bd7188d8c242eddfaeb5bd13
     title: Visualize Data with a Heat Map
-  - id: bd7198d8c242eddfaeb5bd13
+  - 
+    id: bd7198d8c242eddfaeb5bd13
     title: Show National Contiguity with a Force Directed Graph
-  - id: bd7108d8c242eddfaeb5bd13
+  - 
+    id: bd7108d8c242eddfaeb5bd13
     title: Map Data Across the Globe
diff --git a/curriculum/challenges/korean/00-certifications/legacy-front-end-certification/legacy-front-end-certification.yml b/curriculum/challenges/korean/00-certifications/legacy-front-end-certification/legacy-front-end-certification.yml
index d982030a018..398d00b1cc7 100644
--- a/curriculum/challenges/korean/00-certifications/legacy-front-end-certification/legacy-front-end-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/legacy-front-end-certification/legacy-front-end-certification.yml
@@ -1,26 +1,37 @@
+---
 id: 561add10cb82ac38a17513be
 title: Legacy Front End Certification
 certification: legacy-front-end
 challengeType: 7
 isPrivate: true
 tests:
-  - id: bd7158d8c242eddfaeb5bd13
+  - 
+    id: bd7158d8c242eddfaeb5bd13
     title: Build a Personal Portfolio Webpage
-  - id: bd7158d8c442eddfaeb5bd13
+  - 
+    id: bd7158d8c442eddfaeb5bd13
     title: Build a Random Quote Machine
-  - id: bd7158d8c442eddfaeb5bd0f
+  - 
+    id: bd7158d8c442eddfaeb5bd0f
     title: Build a 25 + 5 Clock
-  - id: bd7158d8c442eddfaeb5bd17
+  - 
+    id: bd7158d8c442eddfaeb5bd17
     title: Build a JavaScript Calculator
-  - id: bd7158d8c442eddfaeb5bd10
+  - 
+    id: bd7158d8c442eddfaeb5bd10
     title: Show the Local Weather
-  - id: bd7158d8c442eddfaeb5bd1f
+  - 
+    id: bd7158d8c442eddfaeb5bd1f
     title: Use the Twitch JSON API
-  - id: bd7158d8c442eddfaeb5bd18
+  - 
+    id: bd7158d8c442eddfaeb5bd18
     title: Stylize Stories on Camper News
-  - id: bd7158d8c442eddfaeb5bd19
+  - 
+    id: bd7158d8c442eddfaeb5bd19
     title: Build a Wikipedia Viewer
-  - id: bd7158d8c442eedfaeb5bd1c
+  - 
+    id: bd7158d8c442eedfaeb5bd1c
     title: Build a Tic Tac Toe Game
-  - id: bd7158d8c442eddfaeb5bd1c
+  - 
+    id: bd7158d8c442eddfaeb5bd1c
     title: Build a Simon Game
diff --git a/curriculum/challenges/korean/00-certifications/legacy-full-stack-certification/legacy-full-stack-certification.yml b/curriculum/challenges/korean/00-certifications/legacy-full-stack-certification/legacy-full-stack-certification.yml
index 6ae27ad5eab..3cf64272774 100644
--- a/curriculum/challenges/korean/00-certifications/legacy-full-stack-certification/legacy-full-stack-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/legacy-full-stack-certification/legacy-full-stack-certification.yml
@@ -1,18 +1,25 @@
+---
 id: 561add10cb82ac38a17213bd
 title: Legacy Full Stack Certification
 certification: legacy-full-stack
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 561add10cb82ac38a17513bc
+  - 
+    id: 561add10cb82ac38a17513bc
     title: Responsive Web Design Certification
-  - id: 561abd10cb81ac38a17513bc
+  - 
+    id: 561abd10cb81ac38a17513bc
     title: JavaScript Algorithms and Data Structures Certification
-  - id: 561acd10cb82ac38a17513bc
+  - 
+    id: 561acd10cb82ac38a17513bc
     title: Front End Libraries Certification
-  - id: 5a553ca864b52e1d8bceea14
+  - 
+    id: 5a553ca864b52e1d8bceea14
     title: Data Visualization Certification
-  - id: 561add10cb82ac38a17523bc
+  - 
+    id: 561add10cb82ac38a17523bc
     title: API's and Microservices Certification
-  - id: 561add10cb82ac38a17213bc
+  - 
+    id: 561add10cb82ac38a17213bc
     title: Legacy Information Security and Quality Assurance Certification
diff --git a/curriculum/challenges/korean/00-certifications/legacy-information-security-and-quality-assurance-certification/legacy-information-security-and-quality-assurance-certification.yml b/curriculum/challenges/korean/00-certifications/legacy-information-security-and-quality-assurance-certification/legacy-information-security-and-quality-assurance-certification.yml
index 87b0bef699f..34b1be5ffe6 100644
--- a/curriculum/challenges/korean/00-certifications/legacy-information-security-and-quality-assurance-certification/legacy-information-security-and-quality-assurance-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/legacy-information-security-and-quality-assurance-certification/legacy-information-security-and-quality-assurance-certification.yml
@@ -1,16 +1,22 @@
+---
 id: 561add10cb82ac38a17213bc
 title: Legacy Information Security and Quality Assurance Certification
 certification: legacy-information-security-and-quality-assurance
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 587d8249367417b2b2512c41
+  - 
+    id: 587d8249367417b2b2512c41
     title: Metric-Imperial Converter
-  - id: 587d8249367417b2b2512c42
+  - 
+    id: 587d8249367417b2b2512c42
     title: Issue Tracker
-  - id: 587d824a367417b2b2512c43
+  - 
+    id: 587d824a367417b2b2512c43
     title: Personal Library
-  - id: 587d824a367417b2b2512c44
+  - 
+    id: 587d824a367417b2b2512c44
     title: Stock Price Checker
-  - id: 587d824a367417b2b2512c45
+  - 
+    id: 587d824a367417b2b2512c45
     title: Anonymous Message Board
diff --git a/curriculum/challenges/korean/00-certifications/machine-learning-with-python-certification/machine-learning-with-python-certification.yml b/curriculum/challenges/korean/00-certifications/machine-learning-with-python-certification/machine-learning-with-python-certification.yml
index 82b664f3642..2980c220e15 100644
--- a/curriculum/challenges/korean/00-certifications/machine-learning-with-python-certification/machine-learning-with-python-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/machine-learning-with-python-certification/machine-learning-with-python-certification.yml
@@ -1,17 +1,23 @@
+---
 id: 5e46fc95ac417301a38fb935
 title: Machine Learning with Python Certification
 certification: machine-learning-with-python
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 5e46f8d6ac417301a38fb92d
+  - 
+    id: 5e46f8d6ac417301a38fb92d
     title: Rock Paper Scissors
-  - id: 5e46f8dcac417301a38fb92e
+  - 
+    id: 5e46f8dcac417301a38fb92e
     title: Cat and Dog Image Classifier
-  - id: 5e46f8e3ac417301a38fb92f
+  - 
+    id: 5e46f8e3ac417301a38fb92f
     title: Book Recommendation Engine using KNN
-  - id: 5e46f8edac417301a38fb930
+  - 
+    id: 5e46f8edac417301a38fb930
     title: Linear Regression Health Costs Calculator
-  - id: 5e46f8edac417301a38fb931
+  - 
+    id: 5e46f8edac417301a38fb931
     title: Neural Network SMS Text Classifier
 
diff --git a/curriculum/challenges/korean/00-certifications/quality-assurance-certification/quality-assurance-certification.yml b/curriculum/challenges/korean/00-certifications/quality-assurance-certification/quality-assurance-certification.yml
index b12e25b5331..3f7c0693f56 100644
--- a/curriculum/challenges/korean/00-certifications/quality-assurance-certification/quality-assurance-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/quality-assurance-certification/quality-assurance-certification.yml
@@ -1,17 +1,23 @@
+---
 id: 5e611829481575a52dc59c0e
 title: Quality Assurance Certification
 certification: quality-assurance
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 587d8249367417b2b2512c41
+  - 
+    id: 587d8249367417b2b2512c41
     title: Metric-Imperial Converter
-  - id: 587d8249367417b2b2512c42
+  - 
+    id: 587d8249367417b2b2512c42
     title: Issue Tracker
-  - id: 587d824a367417b2b2512c43
+  - 
+    id: 587d824a367417b2b2512c43
     title: Personal Library
-  - id: 5e601bf95ac9d0ecd8b94afd
+  - 
+    id: 5e601bf95ac9d0ecd8b94afd
     title: Sudoku Solver
-  - id: 5e601c0d5ac9d0ecd8b94afe
+  - 
+    id: 5e601c0d5ac9d0ecd8b94afe
     title: American British Translator
 
diff --git a/curriculum/challenges/korean/00-certifications/relational-database-certification/relational-database-certification.yml b/curriculum/challenges/korean/00-certifications/relational-database-certification/relational-database-certification.yml
index dd82e0c8199..42d4d39de77 100644
--- a/curriculum/challenges/korean/00-certifications/relational-database-certification/relational-database-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/relational-database-certification/relational-database-certification.yml
@@ -1,16 +1,22 @@
+---
 id: 606243f50267e718b1e755f4
 title: Relational Database Certification
 certification: relational-database
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 5f1a4ef5d5d6b5ab580fc6ae
+  - 
+    id: 5f1a4ef5d5d6b5ab580fc6ae
     title: Celestial Bodies Database
-  - id: 5f9771307d4d22b9d2b75a94
+  - 
+    id: 5f9771307d4d22b9d2b75a94
     title: World Cup Database
-  - id: 5f87ac112ae598023a42df1a
+  - 
+    id: 5f87ac112ae598023a42df1a
     title: Salon Appointment Scheduler
-  - id: 602d9ff222201c65d2a019f2
+  - 
+    id: 602d9ff222201c65d2a019f2
     title: Periodic Table Database
-  - id: 602da04c22201c65d2a019f4
+  - 
+    id: 602da04c22201c65d2a019f4
     title: Number Guessing Game
diff --git a/curriculum/challenges/korean/00-certifications/responsive-web-design-certification/responsive-web-design-certification.yml b/curriculum/challenges/korean/00-certifications/responsive-web-design-certification/responsive-web-design-certification.yml
index 811d45d6bf5..43f5bf365e7 100644
--- a/curriculum/challenges/korean/00-certifications/responsive-web-design-certification/responsive-web-design-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/responsive-web-design-certification/responsive-web-design-certification.yml
@@ -1,16 +1,22 @@
+---
 id: 561add10cb82ac38a17513bc
 title: Responsive Web Design Certification
 certification: responsive-web-design
 challengeType: 7
 isPrivate: true
 tests:
-  - id: bd7158d8c442eddfaeb5bd18
+  - 
+    id: bd7158d8c442eddfaeb5bd18
     title: Build a Tribute Page
-  - id: 587d78af367417b2b2512b03
+  - 
+    id: 587d78af367417b2b2512b03
     title: Build a Survey Form
-  - id: 587d78af367417b2b2512b04
+  - 
+    id: 587d78af367417b2b2512b04
     title: Build a Product Landing Page
-  - id: 587d78b0367417b2b2512b05
+  - 
+    id: 587d78b0367417b2b2512b05
     title: Build a Technical Documentation Page
-  - id: bd7158d8c242eddfaeb5bd13
+  - 
+    id: bd7158d8c242eddfaeb5bd13
     title: Build a Personal Portfolio Webpage
diff --git a/curriculum/challenges/korean/00-certifications/scientific-computing-with-python-certification/scientific-computing-with-python-certification.yml b/curriculum/challenges/korean/00-certifications/scientific-computing-with-python-certification/scientific-computing-with-python-certification.yml
index 24bc6df56e7..740fa1870dd 100644
--- a/curriculum/challenges/korean/00-certifications/scientific-computing-with-python-certification/scientific-computing-with-python-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/scientific-computing-with-python-certification/scientific-computing-with-python-certification.yml
@@ -1,16 +1,22 @@
+---
 id: 5e44431b903586ffb414c951
 title: Scientific Computing with Python Certification
 certification: scientific-computing-with-python
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 5e44412c903586ffb414c94c
+  - 
+    id: 5e44412c903586ffb414c94c
     title: Arithmetic Formatter
-  - id: 5e444136903586ffb414c94d
+  - 
+    id: 5e444136903586ffb414c94d
     title: Time Calculator
-  - id: 5e44413e903586ffb414c94e
+  - 
+    id: 5e44413e903586ffb414c94e
     title: Budget App
-  - id: 5e444147903586ffb414c94f
+  - 
+    id: 5e444147903586ffb414c94f
     title: Polygon Area Calculator
-  - id: 5e44414f903586ffb414c950
+  - 
+    id: 5e44414f903586ffb414c950
     title: Probability Calculator
diff --git a/curriculum/challenges/korean/00-certifications/upcoming-python-certification/upcoming-python-certification.yml b/curriculum/challenges/korean/00-certifications/upcoming-python-certification/upcoming-python-certification.yml
index 68737f4d7c4..71963dffb54 100644
--- a/curriculum/challenges/korean/00-certifications/upcoming-python-certification/upcoming-python-certification.yml
+++ b/curriculum/challenges/korean/00-certifications/upcoming-python-certification/upcoming-python-certification.yml
@@ -5,5 +5,6 @@ certification: upcoming-python-certification
 challengeType: 7
 isPrivate: true
 tests:
-  - id: 64afc37bf3b37856e035b85e
+  - 
+    id: 64afc37bf3b37856e035b85e
     title: Upcoming Python Project
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/add-a-text-alternative-to-images-for-visually-impaired-accessibility.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/add-a-text-alternative-to-images-for-visually-impaired-accessibility.md
index 7688867e31c..25fb88aa4bc 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/add-a-text-alternative-to-images-for-visually-impaired-accessibility.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/add-a-text-alternative-to-images-for-visually-impaired-accessibility.md
@@ -1,6 +1,6 @@
 ---
 id: 587d774c367417b2b2512a9c
-title: Add a Text Alternative to Images for Visually Impaired Accessibility
+title: 시각 장애 접근성을 위한 대체 텍스트 추가하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cPp7VfD'
 forumTopicId: 16628
@@ -9,23 +9,23 @@ dashedName: add-a-text-alternative-to-images-for-visually-impaired-accessibility
 
 # --description--
 
-You've likely seen an `alt` attribute on an `img` tag in other challenges. `alt` text describes the image's content and provides a text-alternative for it. An `alt` attribute helps in cases where the image fails to load or can't be seen by a user. Search engines also use it to understand what an image contains to include it in search results. Here's an example:
+다른 도전 과제들에서 `img` 태그의 `alt` 속성을 본 적 있을 것입니다. `alt` 텍스트는 이미지의 내용을 설명하는 대체 텍스트를 제공합니다. `alt` 속성은 이미지 다운로드가 실패하는 등의 이유로 사용자가 이미지를 볼 수 없을 경우에 도움이 됩니다. 검색 엔진 또한 이미지가 어떤 내용을 담는지 이해하고 이를 검색 결과에 반영하기 위해서 이를 활용합니다. 여기 예시가 있습니다.
 
 ```html
 <img src="importantLogo.jpeg" alt="Company logo">
 ```
 
-People with visual impairments rely on screen readers to convert web content to an audio interface. They won't get information if it's only presented visually. For images, screen readers can access the `alt` attribute and read its contents to deliver key information.
+시각 장애가 있는 사람들은 웹 콘텐츠를 음성으로 변환해주는 스크린 리더에 의존합니다. 만일콘텐츠가 시각적으로만 제공된다면, 이들은 아무런 정보도 얻지 못할 것입니다. 이미지의 경우, 스크린 리더가 `alt` 속성에 접근해 콘텐츠를 읽을 수 있으므로 중요한 정보가 전달됩니다.
 
-Good `alt` text provides the reader a brief description of the image. You should always include an `alt` attribute on your image. Per HTML5 specification, this is now considered mandatory.
+잘 쓰인 `alt` 대체 텍스트는 이미지를 명료하게 표현합니다. 이미지에 항상 `alt` 속성을 추가하세요. HTML5 명세에 따르면, 이는 의무사항으로 간주됩니다.
 
 # --instructions--
 
-Camper Cat happens to be both a coding ninja and an actual ninja, who is building a website to share his knowledge. The profile picture he wants to use shows his skills and should be appreciated by all site visitors. Add an `alt` attribute in the `img` tag, that explains Camper Cat is doing karate. (The image `src` doesn't link to an actual file, so you should see the `alt` text in the display.)
+캠퍼 캣은 코딩과 무술을 잘 합니다. 캠퍼 캣은 개인 웹사이트에서 자신의 지식을 공유하고 싶어합니다. 캠퍼 캣은 자신의 프로필 사진으로 방문자들을 감탄시키고 싶습니다. `alt`와 `img`태그를 더해서 캠퍼 캣이 무술을 할 수 있다는 설명을 더해주세요. `src` 이미지에는 실제 파일의 링크가 걸려있지 않으므로, 화면의 `alt` 텍스트를 보세요.
 
 # --hints--
 
-Your `img` tag should have an `alt` attribute and it should not be empty.
+`img` 태그에는 `alt` 속성이 있어야 하며, 빈 텍스트가 들어가면 안 됩니다.
 
 ```js
 assert($('img').attr('alt'));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/add-an-accessible-date-picker.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/add-an-accessible-date-picker.md
index c85715a728e..a93f97f4eae 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/add-an-accessible-date-picker.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/add-an-accessible-date-picker.md
@@ -1,6 +1,6 @@
 ---
 id: 587d778b367417b2b2512aa8
-title: Add an Accessible Date Picker
+title: 접근성을 갖춘 날짜 선택기 추가하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cR3bRbCV'
 forumTopicId: 301008
@@ -9,13 +9,13 @@ dashedName: add-an-accessible-date-picker
 
 # --description--
 
-Forms often include the `input` field, which can be used to create several different form controls. The `type` attribute on this element indicates what kind of `input` element will be created.
+폼(Form)은 여러 다양한 폼 컨트롤에 사용되는 `input` 필드를 포함합니다. 이러한 HTML 엘리먼트의 `type` 속성을 통해 해당 엘리먼트가 어떤 `input`인지 알 수 있습니다.
 
-You may have noticed the `text` and `submit` input types in prior challenges, and HTML5 introduced an option to specify a `date` field. Depending on browser support, a date picker shows up in the `input` field when it's in focus, which makes filling in a form easier for all users.
+이전 도전 과제에서 `text`와 `submit` 타입을 확인했을 텐데, HTML5에서는 `date` 필드를 지정할 수 있는 옵션도 도입되었습니다. 브라우저별로 다르지만, 날짜 선택기는 어떤 유저든 폼을 채우기 쉽게 `input` 필드가 포커스 상태일 때 나타납니다.
 
-For older browsers, the type will default to `text`, so it helps to show users the expected date format in the `label` or `placeholder` text just in case.
+구형 브라우저의 경우, `text`가 기본 타입으로 되어 있으니, `label`이나 `placeholder` 텍스트를 통해 유저가 날짜 형식을 예상하도록 도와줍니다.
 
-Here's an example:
+아래는 예시입니다.
 
 ```html
 <label for="input1">Enter a date:</label>
@@ -24,29 +24,29 @@ Here's an example:
 
 # --instructions--
 
-Camper Cat is setting up a Mortal Kombat tournament and wants to ask his competitors to see what date works best. Add an `input` tag with a `type` attribute of `date`, an `id` attribute of `pickdate`, and a `name` attribute of `date`.
+Mortal Kombat 토너먼트를 준비 중인 Camper Cat은 그의 참가자들에게 어떤 날짜가 가장 나은지 묻고 싶습니다. `type` 속성으로 `date`를, `id` 속성으로 `pickdate`를, `name` 속성으로 `date`를 갖는 `input` 태그를 추가하세요.
 
 # --hints--
 
-Your code should add one `input` tag for the date selector field.
+코드에 날짜 선택 필드를 위한 `input` 태그 하나를 추가합니다.
 
 ```js
 assert($('input').length == 2);
 ```
 
-Your `input` tag should have a `type` attribute with a value of `date`.
+`input` 태그에 `date`라는 값을 가지는 `type` 속성을 포함해야 합니다.
 
 ```js
 assert($('input').attr('type') == 'date');
 ```
 
-Your `input` tag should have an `id` attribute with a value of `pickdate`.
+`input` 태그에 `pickdate`라는 값을 가지는 `id` 속성을 포함해야 합니다.
 
 ```js
 assert($('input').attr('id') == 'pickdate');
 ```
 
-Your `input` tag should have a `name` attribute with a value of `date`.
+`input` 태그에 `date`라는 값을 가지는 `name` 속성을 추가해야 합니다.
 
 ```js
 assert($('input').attr('name') == 'date');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-carefully-choosing-colors-that-convey-information.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-carefully-choosing-colors-that-convey-information.md
index 0e076d00038..b4cdda868d3 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-carefully-choosing-colors-that-convey-information.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-carefully-choosing-colors-that-convey-information.md
@@ -1,8 +1,7 @@
 ---
 id: 587d778f367417b2b2512aad
 title: >-
-  Avoid Colorblindness Issues by Carefully Choosing Colors that Convey
-  Information
+  색약 이용자에게도 정보를 전달하는 세심한 색상 선택
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c437as3'
 forumTopicId: 301011
@@ -12,19 +11,19 @@ dashedName: >-
 
 # --description--
 
-There are various forms of colorblindness. These can range from a reduced sensitivity to a certain wavelength of light to the inability to see color at all. The most common form is a reduced sensitivity to detect greens.
+색약에는 많은 종류가 있습니다. 특정 파장의 빛에 감도가 떨어지는 것부터 색상을 구별할 수 없는 것까지 포함됩니다. 초록색에 대한 감도가 떨어지는 것이 가장 일반적인 형태입니다.
 
-For example, if two similar green colors are the foreground and background color of your content, a colorblind user may not be able to distinguish them. Close colors can be thought of as neighbors on the color wheel, and those combinations should be avoided when conveying important information.
+예를 들어, 내용의 전경과 배경이 각각 서로 비슷한 초록색이라면, 색약 유저는 이를 구별하기 어려울 것입니다. 중요한 정보를 전달할 때는 색상환에서 서로 근접한 색상의 조합을 피해야 합니다.
 
-**Note:** Some online color picking tools include visual simulations of how colors appear for different types of colorblindness. These are great resources in addition to online contrast checking calculators.
+**Note:** 일부 온라인 색상 선택 툴은 여러 타입의 색약에게 색상이 어떻게 보이는지 시뮬레이션을 제공합니다. 이것은 온라인 색상 대비 계산기로도 활용될 수 있는 훌륭한 리소스입니다.
 
 # --instructions--
 
-Camper Cat is testing different styles for an important button, but the yellow (`#FFFF33`) `background-color` and the green (`#33FF33`) text `color` are neighboring hues on the color wheel and virtually indistinguishable for some colorblind users. (Their similar lightness also fails the contrast ratio check). Change the text `color` to a dark blue (`#003366`) to solve both problems.
+캠퍼 고양이는 중요한 버튼을 위한 여러 스타일을 테스팅하고 있지만, 노랑과 (`#FFFF33`) `background-color` 초록 (`#33FF33`) 텍스트는 `color`는 색상환에서 서로 인접해 있으며 일부 색약 유저들은 구분할 수 없습니다. 또한, 이것은 대비 비율 검사를 통과하지도 못했습니다. 텍스트 `color` 를 어두운 파랑 (`#003366`) 으로 바꾸어 두가지 문제를 모두 해결해보세요.
 
 # --hints--
 
-Your code should change the text `color` for the `button` to the dark blue.
+여러분의 코드는 `button` 의 텍스트 `color` 를 어두운 파랑으로 바꾸어야 합니다.
 
 ```js
 assert($('button').css('color') == 'rgb(0, 51, 102)');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-using-sufficient-contrast.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-using-sufficient-contrast.md
index f4369666a6b..cc7c9156ace 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-using-sufficient-contrast.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/avoid-colorblindness-issues-by-using-sufficient-contrast.md
@@ -1,6 +1,6 @@
 ---
 id: 587d778f367417b2b2512aac
-title: Avoid Colorblindness Issues by Using Sufficient Contrast
+title: 색약 이용자를 위해 충분한 대비 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cmzMEUw'
 forumTopicId: 301012
@@ -9,27 +9,27 @@ dashedName: avoid-colorblindness-issues-by-using-sufficient-contrast
 
 # --description--
 
-Color is a large part of visual design, but its use introduces two accessibility issues. First, color alone should not be used as the only way to convey important information because screen reader users won't see it. Second, foreground and background colors need sufficient contrast so colorblind users can distinguish them.
+시각 디자인에서 색상은 큰 부분을 차지하지만, 여기서는 두 가지 접근성 이슈를 소개합니다. 첫째로, 중요한 정보를 전달하는 유일한 방법이 색상이어서는 안 됩니다. 스크린 리더를 이용하는 유저들은 볼 수 없기 때문이죠. 둘째로, 전경과 배경 색상이 충분한 대비를 가져야 색약 유저들이 이를 구분할 수 있습니다.
 
-Previous challenges covered having text alternatives to address the first issue. The last challenge introduced contrast checking tools to help with the second. The WCAG-recommended contrast ratio of 4.5:1 applies for color use as well as gray-scale combinations.
+이전의 챌린지는 대체 텍스트를 넣는 것으로 첫 번째 이슈를 해결합니다. 마지막 챌린지는 대비 체크 도구를 사용해서 두 번째 이슈를 해결하는 것을 소개합니다. WCAG가 권장하는 대비 비율인 4.5:1은 색상 사용 뿐만 아니라 회색조 조합에도 사용됩니다.
 
-Colorblind users have trouble distinguishing some colors from others - usually in hue but sometimes lightness as well. You may recall the contrast ratio is calculated using the relative luminance (or lightness) values of the foreground and background colors.
+색약 유저들은 일부 색을 구별하는 데 어려움을 겪습니다 - 보통은 색상이지만 종종 명도를 포함합니다. 기억하시겠지만, 대비 비율은 전경색과 배경색의 상대적인 휘도(또는 명도) 를 사용하여 계산됩니다.
 
-In practice, the 4.5:1 contrast ratio can be reached by shading (adding black to) the darker color and tinting (adding white to) the lighter color. Darker shades on the color wheel are considered to be shades of blues, violets, magentas, and reds, whereas lighter tinted colors are oranges, yellows, greens, and blue-greens.
+4.5:1의 대비 비율은 더 어두운 색상에 검은색을 더하는 shading과 더 밝은 색상에 흰색을 더하는 tinting을 통해 얻을 수 있습니다. 색상환에서 더 어두운 shade는 주로 파란색, 보라색, 마젠타, 빨간색에 검은색이 섞인 색조를 나타냅니다. 반면 더 밝은 tinted color는 주로 주황색, 노란색, 초록색, 청록색과 같은 색에 흰색이 섞인 색조를 나타냅니다.
 
 # --instructions--
 
-Camper Cat is experimenting with using color for his blog text and background, but his current combination of a greenish `background-color` with maroon text `color` has a 2.5:1 contrast ratio. You can easily adjust the lightness of the colors since he declared them using the CSS `hsl()` property (which stands for hue, saturation, lightness) by changing the third argument. Increase the `background-color` lightness value from 35% to 55%, and decrease the `color` lightness value from 20% to 15%. This improves the contrast to 5.9:1.
+캠퍼 캣은 자신의 블로그 텍스트와 배경에 어떤 색상을 적용할지 실험해보고 있습니다. 하지만 현재 적용된 녹색 `background-color`와 밤색 텍스트 `color` 색상 조합은 2.5:1의 대비 비율을 가지고 있습니다. 색상들이 CSS의 `hsl()` 속성을 사용하여 선언되었기 때문에, 여러분은 세 번째 인자 값을 변경함으로써 색상의 명도를 쉽게 조절할 수 있습니다. (hsl에서 hue는 색상, saturation은 채도, lightness는 명도를 나타냅니다.) `background-color`의 명도를 35%에서 55%로 높이고, `color`의 명도를 20%에서 15%로 낮추십시오. 이렇게 하면 대비가 5.9:1로 향상됩니다.
 
 # --hints--
 
-Your code should only change the lightness value for the text `color` property to a value of 15%.
+여러분의 코드는 텍스트 `color` 속성의 명도를 15%로 변경해야 합니다.
 
 ```js
 assert(code.match(/color:\s*?hsl\(0,\s*?55%,\s*?15%\)/gi));
 ```
 
-Your code should only change the lightness value for the `background-color` property to a value of 55%.
+여러분의 코드는 `background-color`속성의 명도를 55%로 변경해야 합니다.
 
 ```js
 assert(code.match(/background-color:\s*?hsl\(120,\s*?25%,\s*?55%\)/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/give-links-meaning-by-using-descriptive-link-text.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/give-links-meaning-by-using-descriptive-link-text.md
index 91ab935f674..d27625e0161 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/give-links-meaning-by-using-descriptive-link-text.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/give-links-meaning-by-using-descriptive-link-text.md
@@ -1,6 +1,6 @@
 ---
 id: 587d778f367417b2b2512aae
-title: Give Links Meaning by Using Descriptive Link Text
+title: 설명이 포함된 링크(Link) 텍스트로 링크에 의미주기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c437DcV'
 forumTopicId: 301013
@@ -9,17 +9,17 @@ dashedName: give-links-meaning-by-using-descriptive-link-text
 
 # --description--
 
-Screen reader users have various options for what type of content their device reads. These options include skipping to (or over) landmark elements, jumping to the main content, or getting a page summary from the headings. Another option is to only hear the links available on a page.
+스크린 리더(screen reader) 사용자들은 자신들의 기기가 어떤 유형의 내용을 읽는지에 관해 다양한 선택지가 있습니다. 이 선택지들은 랜드마크(landmark) 요소로 건너뛰기, 본문으로 넘어가기 혹은 글머리에서 페이지 요약 가져오기 등이 있습니다. 다른 선택지로는 한 페이지 내에서 가능한 링크들을 듣는 것입니다.
 
-Screen readers do this by reading the link text, or what's between the anchor (`a`) tags. Having a list of "click here" or "read more" links isn't helpful. Instead, use brief but descriptive text within the `a` tags to provide more meaning for these users.
+스크린 리더는 링크 텍스트 혹은 (`a`) 태그 사이에 무엇이 있는지 읽어서 이 작업을 합니다. "여기를 클릭하세요" 혹은 "더보기" 같은 링크들은 도움이 되지 않습니다. 대신에 스크린 리더 사용자들에게 더 많은 의미를 제공하려면 `a` 태그에 설명이 간결하고 명확한 텍스트를 사용하면 됩니다.
 
 # --instructions--
 
-The link text that Camper Cat is using is not very descriptive without the surrounding context. Move the anchor (`a`) tags so they wrap around the text `information about batteries` instead of `Click here`.
+Camper Cat이 사용하고 있는 링크 텍스트는 문맥의 이해없이는 그리 설명적이지 않습니다. `Click here` 대신에 `information about batteries`가 감싸지도록 (`a`) 태그를 옮겨주세요.
 
 # --hints--
 
-Your code should move the anchor `a` tags from around the words `Click here` to wrap around the words `information about batteries`.
+`information about batteries`를 감싸도록 `Click here`로부터 `a` 태그를 옮겨야 합니다.
 
 ```js
 assert(
@@ -29,13 +29,13 @@ assert(
 );
 ```
 
-The `a` element should have an `href` attribute with a value of an empty string `""`.
+`a` 요소는 빈 문자열인 `""` 값을 가진 `href` 속성을 지니고 있어야 합니다.
 
 ```js
 assert($('a').attr('href') === '');
 ```
 
-The `a` element should have a closing tag.
+`a` 요소는 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-accessibility-of-audio-content-with-the-audio-element.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-accessibility-of-audio-content-with-the-audio-element.md
index fa69314f96f..9144c8233b2 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-accessibility-of-audio-content-with-the-audio-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-accessibility-of-audio-content-with-the-audio-element.md
@@ -1,6 +1,6 @@
 ---
 id: 587d7789367417b2b2512aa4
-title: Improve Accessibility of Audio Content with the audio Element
+title: 오디오 요소를 사용하여 오디오 콘텐츠의 접근성 향상
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cVJVkcZ'
 forumTopicId: 301014
@@ -9,11 +9,11 @@ dashedName: improve-accessibility-of-audio-content-with-the-audio-element
 
 # --description--
 
-HTML5's `audio` element gives semantic meaning when it wraps sound or audio stream content in your markup. Audio content also needs a text alternative to be accessible to people who are deaf or hard of hearing. This can be done with nearby text on the page or a link to a transcript.
+HTML5의 `audio` 요소는 마크업에서 소리나 오디오 스트림 콘텐츠를 감싸서 시맨틱 의미를 부여합니다. 청각을 잃었거나 청력이 제한된 사람들을 위해 오디오 콘텐츠에는 대체 텍스트가 필요합니다. 이는 페이지 내에서 콘텐츠 근처의 텍스트 또는 대본으로 연결된 링크를 통해 제공할 수 있습니다.
 
-The `audio` tag supports the `controls` attribute. This shows the browser default play, pause, and other controls, and supports keyboard functionality. This is a boolean attribute, meaning it doesn't need a value, its presence on the tag turns the setting on.
+`audio` 태그는 `controls` 속성을 지원합니다. 이 기능은 브라우저의 기본 재생, 일시 중지 및 기타 컨트롤을 표시하며 키보드 기능을 지원합니다. 이 속성은 불리언(boolean) 속성으로, 값이 필요하지 않습니다. 태그에 이 속성이 포함되면 설정이 켜집니다.
 
-Here's an example:
+여기 예시가 있습니다.
 
 ```html
 <audio id="meowClip" controls>
@@ -22,23 +22,23 @@ Here's an example:
 </audio>
 ```
 
-**Note:** Multimedia content usually has both visual and auditory components. It needs synchronized captions and a transcript so users with visual and/or auditory impairments can access it. Generally, a web developer is not responsible for creating the captions or transcript, but needs to know to include them.
+**참고:** 일반적으로 멀티미디어 콘텐츠에는 시각적 및 청각적 구성 요소가 모두 포함되어 있습니다. 시각적 또는 청각적 장애를 가진 사용자들이 액세스할 수 있도록 동기화된 자막과 대본이 필요합니다. 일반적으로 웹 개발자가 자막이나 대본을 꼭 작성해야하는 것은 아니지만 이를 포함해야 하는 방법은 알고 있어야 합니다.
 
 # --instructions--
 
-Time to take a break from Camper Cat and meet fellow camper Zersiax (@zersiax), a champion of accessibility and a screen reader user. To hear a clip of his screen reader in action, add an `audio` element after the `p` element. Include the `controls` attribute. Then place a `source` element inside the `audio` tags with the `src` attribute set to `https://s3.amazonaws.com/freecodecamp/screen-reader.mp3` and `type` attribute set to `"audio/mpeg"`.
+캠퍼 캣(Camper Cat)에서 쉬는 시간입니다. 이번에는 캠퍼 Zersiax(@zersiax)를 만나보겠습니다. 그는 스크린 리더 사용자이자 접근성 마스터 입니다. `p` 요소 뒤에 `audio` 요소를 추가하면 스크린 리더 작동 소리를 듣을 수 있습니다. `controls` 속성을 포함하세요. 그런 다음 `src` 속성을 `https://s3.amazonaws.com/freecodecamp/screen-reader.mp3`로, `type` 속성을 `"audio/mpeg"`로 설정하여 `audio` 태그 안에 `source` 요소를 배치하세요.
 
-**Note:** The audio clip may sound fast and be difficult to understand, but that is a normal speed for screen reader users.
+**참고:** 오디오 클립이 빠르게 들릴 수 있고 이해하기 어려울 수 있지만, 이는 스크린 리더 사용자에게 정상적인 속도입니다.
 
 # --hints--
 
-Your code should have one `audio` tag.
+코드에는 `audio` 태그가 하나만 있어야 합니다.
 
 ```js
 assert($('audio').length === 1);
 ```
 
-Your `audio` element should have a closing tag.
+`audio` 요소에는 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
@@ -47,25 +47,25 @@ assert(
 );
 ```
 
-The `audio` tag should have the `controls` attribute.
+`audio` 태그는 `controls` 속성을 포함해야 합니다.
 
 ```js
 assert($('audio').attr('controls'));
 ```
 
-Your code should have one `source` tag.
+코드에는 `source` 태그가 하나만 있어야 합니다.
 
 ```js
 assert($('source').length === 1);
 ```
 
-Your `source` tag should be inside the `audio` tags.
+`source` 태그는 `audio` 태그 안에 있어야 합니다.
 
 ```js
 assert($('audio').children('source').length === 1);
 ```
 
-The value for the `src` attribute on the `source` tag should match the link in the instructions exactly.
+`source` 태그의 `src` 속성 값은 안내에 제공된 링크와 일치해야 합니다.
 
 ```js
 assert(
@@ -74,7 +74,7 @@ assert(
 );
 ```
 
-Your code should include a `type` attribute on the `source` tag with a value of audio/mpeg.
+`source` 태그에는 `type` 속성이 포함되어 있어야 하며 값은 audio/mpeg 여야 합니다.
 
 ```js
 assert($('source').attr('type') === 'audio/mpeg');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-chart-accessibility-with-the-figure-element.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-chart-accessibility-with-the-figure-element.md
index d677e66b940..86a2cc17b60 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-chart-accessibility-with-the-figure-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-chart-accessibility-with-the-figure-element.md
@@ -1,6 +1,6 @@
 ---
 id: 587d778a367417b2b2512aa5
-title: Improve Chart Accessibility with the figure Element
+title: figure 요소를 사용하여 차트의 접근성 높이기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cGJMqtE'
 forumTopicId: 301015
@@ -9,11 +9,11 @@ dashedName: improve-chart-accessibility-with-the-figure-element
 
 # --description--
 
-HTML5 introduced the `figure` element and the related `figcaption`. Used together, these items wrap a visual representation (like an image, diagram, or chart) along with its caption. Wrapping these elements together gives a two-fold accessibility boost by semantically grouping related content and providing a text alternative explaining the `figure`.
+HTML5에서는 `figure` 요소 그리고 이와 관련된 `figcaption`을 도입했습니다. 이러한 항목들을 함께 사용하여 시각적 표현물(예: 이미지, 다이어그램 또는 차트)과 해당 캡션을 안에 함께 묶습니다. 이러한 요소들을 함께 묶으면 관련된 콘텐츠를 시맨틱적으로 그룹화하고 `figure`를 설명하는 대체 텍스트를 제공함으로써 접근성을 두 배로 향상시킬 수 있습니다.
 
-For data visualizations like charts, the caption can be used to briefly note the trends or conclusions for users with visual impairments. Another challenge covers how to move a table version of the chart's data off-screen (using CSS) for screen reader users.
+차트와 같은 데이터 시각화에 쓰이는 캡션은 추세나 결론을 간단히 요약 정리해서 시각 장애를 가진 사용자들에게 도움을 줄 수 있습니다. 또 다른 도전 과제는 스크린 리더 사용자를 위해 표로 나타내어진 차트의 데이터를 CSS 사용하여 화면에는 보이지 않지만 스크린 리더기가 읽을 수 있도록 하는 법을 다룹니다.
 
-Here's an example - note that the `figcaption` goes inside the `figure` tags and can be combined with other elements:
+여기 예시가 있습니다. `figcaption`이 `figure` 태그 내부에 들어가고 다른 요소들과 결합될 수 있다는 것에 유의하세요.
 
 ```html
 <figure>
@@ -27,41 +27,41 @@ Here's an example - note that the `figcaption` goes inside the `figure` tags and
 
 # --instructions--
 
-Camper Cat is hard at work creating a stacked bar chart showing the amount of time per week to spend training in stealth, combat, and weapons. Help him structure his page better by changing the `div` tag he used to a `figure` tag, and the `p` tag that surrounds the caption to a `figcaption` tag.
+캠퍼 캣은 스텔스, 전투 및 무기 훈련에 매주 얼마나 많은 시간을 할애해야 하는지 보여주는 쌓인 막대 차트를 만들고 있습니다. 캠퍼 캣을 도와 페이지 구조를 더 잘 구성할 수 있도록 `div` 태그를 `figure` 태그로 변경하고, 캡션을 둘러싼 `p` 태그를 `figcaption` 태그로 변경해주세요.
 
 # --hints--
 
-Your code should have one `figure` tag.
+`figure` 태그는 하나만 있어야 합니다.
 
 ```js
 assert($('figure').length == 1);
 ```
 
-Your code should have one `figcaption` tag.
+`figcaption` 태그는 하나만 있어야 합니다.
 
 ```js
 assert($('figcaption').length == 1);
 ```
 
-Your code should not have any `div` tags.
+`div` 태그는 하나만 있어야 합니다.
 
 ```js
 assert($('div').length == 0);
 ```
 
-Your code should not have any `p` tags.
+`p` 태그는 하나도 없어야 합니다.
 
 ```js
 assert($('p').length == 0);
 ```
 
-The `figcaption` should be a child of the `figure` tag.
+`figcaption`태그는 `figure`의 자식(child) 태그여야 합니다.
 
 ```js
 assert($('figure').children('figcaption').length == 1);
 ```
 
-Your `figure` element should have a closing tag.
+`figure` 요소는 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-form-field-accessibility-with-the-label-element.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-form-field-accessibility-with-the-label-element.md
index 55492a9a50e..465aa6dc571 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-form-field-accessibility-with-the-label-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-form-field-accessibility-with-the-label-element.md
@@ -1,6 +1,6 @@
 ---
 id: 587d778a367417b2b2512aa6
-title: Improve Form Field Accessibility with the label Element
+title: label 요소를 사용하여 폼 필드의 접근성 높이기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cGJMMAN'
 forumTopicId: 301016
@@ -9,13 +9,13 @@ dashedName: improve-form-field-accessibility-with-the-label-element
 
 # --description--
 
-Improving accessibility with semantic HTML markup applies to using both appropriate tag names and attributes. The next several challenges cover some important scenarios using attributes in forms.
+시맨틱 HTML 마크업으로 접근성을 높이는 것은 적절한 태그 이름과 속성을 사용하는데 적용됩니다. 다음 몇 가지 챌린지들은 속성들을 폼에서 활용하는 몇 가지 중요한 시나리오들을 다룹니다.
 
-The `label` tag wraps the text for a specific form control item, usually the name or label for a choice. This ties meaning to the item and makes the form more readable. The `for` attribute on a `label` tag explicitly associates that `label` with the form control and is used by screen readers.
+`label` 태그는 특정 폼 제어 항목을 위해 텍스트를 래핑하는데, 보통 이름이나 레이블을 선택합니다. 이렇게 하면 항목과 의미가 연결되고 폼을 더 읽기 쉽게 만들어 줍니다. `label` 태그에 `for` 속성은 `label`과 폼 제어를 명시적으로 연결해주고 화면 낭독 프로그램에 사용됩니다.
 
-You learned about radio buttons and their labels in a lesson in the Basic HTML section. In that lesson, we wrapped the radio button input element inside a `label` element along with the label text in order to make the text clickable. Another way to achieve this is by using the `for` attribute, as explained in this lesson.
+Basic HTML 단원의 한 수업에서 라디오 버튼들과 이것들의 레이블들에 대해 배웠습니다. 그 수업에서 라디오 버튼 입력 요소와 레이블 텍스트를 `label` 요소 안에 래핑 함으로써 텍스트를 클릭할 수 있게 만들었습니다. 이를 성취하는 또다른 방법은 이 수업에 설명되었던 것처럼 `for` 속성을 사용하는 것입니다.
 
-The value of the `for` attribute must be the same as the value of the `id` attribute of the form control. Here's an example:
+`for` 속성 값이 폼 제어의 `id` 속성 값과 똑같아야 합니다. 여기 예시가 있습니다.
 
 ```html
 <form>
@@ -26,17 +26,17 @@ The value of the `for` attribute must be the same as the value of the `id` attri
 
 # --instructions--
 
-Camper Cat expects a lot of interest in his thoughtful blog posts and wants to include an email sign up form. Add a `for` attribute on the email `label` that matches the `id` on its `input` field.
+Camper Cat은 그의 생각 깊은 블로그 글들로부터 많은 수익을 벌길 기대하고 있고 이메일 가입 폼을 포함하길 원합니다. `input` 필드에 있는 `id`와 일치하는 `for` 속성을 이메일 `label`에 추가합니다.
 
 # --hints--
 
-Your code should have a `for` attribute on the `label` tag that is not empty.
+코드에는 `label` 태그에 비어 있지 않은 `for` 속성이 있어야 합니다.
 
 ```js
 assert($('label').attr('for'));
 ```
 
-Your `for` attribute value should match the `id` value on the email `input`.
+`for` 속성 값은 이메일 `input`에 있는 `id` 값과 일치해야 합니다.
 
 ```js
 assert($('label').attr('for') == 'email');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-readability-with-high-contrast-text.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-readability-with-high-contrast-text.md
index 8bf9b62cf57..9d0d92ea463 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-readability-with-high-contrast-text.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/improve-readability-with-high-contrast-text.md
@@ -1,6 +1,6 @@
 ---
 id: 587d778e367417b2b2512aab
-title: Improve Readability with High Contrast Text
+title: 높은 대비를 갖고 있는 텍스트를 사용하여 가독성 높이기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cKb3nCq'
 forumTopicId: 301017
@@ -9,23 +9,23 @@ dashedName: improve-readability-with-high-contrast-text
 
 # --description--
 
-Low contrast between the foreground and background colors can make text difficult to read. Sufficient contrast improves your content's readability, but what exactly does "sufficient" mean?
+배경색과 전경색 간의 낮은 색채 대비는 글씨를 읽기 어렵게 만들 수 있습니다. 충분한 대비는 콘텐츠의 가독성을 향상시킵니다. 그러나 여기서 "충분한"이란 정확히 무엇을 의미할까요?
 
-The Web Content Accessibility Guidelines (WCAG) recommend at least a 4.5 to 1 contrast ratio for normal text. The ratio is calculated by comparing the relative luminance values of two colors. This ranges from 1:1 for the same color, or no contrast, to 21:1 for white against black, the most substantial contrast. There are many contrast checking tools available online that calculate this ratio for you.
+웹 콘텐츠 접근성 지침(WCAG)은 일반 텍스트의 최소 대비 비율로 4.5 대 1을 권장합니다. 이 비율은 두 색상의 상대 밝기 값을 비교하여 계산됩니다. 이 비율은 동일한 색상인 경우나 대비가 없을 경우에 1:1 부터 가장 큰 대비인 흰색 대 검정의 경우 21:1까지 범위가 있습니다. 인터넷에서 색채 대비 비율을 계산해주는 검사 도구들을 쉽게 찾아볼 수 있습니다.
 
 # --instructions--
 
-Camper Cat's choice of light gray text on a white background for his recent blog post has a 1.5:1 contrast ratio, making it hard to read. Change the `color` of the text from the current gray (`#D3D3D3`) to a darker gray (`#636363`) to improve the contrast ratio to 6:1.
+캠퍼 캣이 최근 블로그 게시물에서 선택한 연한 회색 텍스트와 흰색 배경은 1.5:1의 대비 비율을 가지고 있어 읽기 어렵습니다. 대비 비율을 향상시키기 위해 현재 회색(`#D3D3D3`)에서 더 진한 회색(`#636363`)으로 텍스트의 `color`를 변경하세요. 이렇게 하면 대비 비율이 6:1로 향상됩니다.
 
 # --hints--
 
-Your code should change the text `color` for the `body` to the darker gray.
+코드를 이용해서 `body`의 텍스트 `color`를 더 진한 회색으로 변경해야 합니다.
 
 ```js
 assert($('body').css('color') == 'rgb(99, 99, 99)');
 ```
 
-Your code should not change the `background-color` for the `body`.
+코드에서 `body`의 `background-color`를 변경해서는 안 됩니다.
 
 ```js
 assert($('body').css('background-color') == 'rgb(255, 255, 255)');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/jump-straight-to-the-content-using-the-main-element.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/jump-straight-to-the-content-using-the-main-element.md
index 83031edde59..4d66fc77a58 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/jump-straight-to-the-content-using-the-main-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/jump-straight-to-the-content-using-the-main-element.md
@@ -1,6 +1,6 @@
 ---
 id: 587d774e367417b2b2512a9f
-title: Jump Straight to the Content Using the main Element
+title: main 요소를 이용해 콘텐츠로 이동하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cPp7zuE'
 forumTopicId: 301018
@@ -9,27 +9,27 @@ dashedName: jump-straight-to-the-content-using-the-main-element
 
 # --description--
 
-HTML5 introduced several new elements that give developers more options while also incorporating accessibility features. These tags include `main`, `header`, `footer`, `nav`, `article`, and `section`, among others.
+HTML5은 개발자들에게 많은 선택지를 주는 요소들을 소개했으며 접근성 관련 기능들도 통합시켰습니다. 여기에는 여러 태그들 중에 `main`, `header`, `footer`, `nav`, `article`, `section`이 포함됩니다.
 
-By default, a browser renders these elements similar to the humble `div`. However, using them where appropriate gives additional meaning to your markup. The tag name alone can indicate the type of information it contains, which adds semantic meaning to that content. Assistive technologies can access this information to provide better page summary or navigation options to their users.
+브라우저는 기본적으로 이러한 요소들을 `div`와 비슷하게 렌더링합니다. 하지만 이들을 적절하게 사용하는 것이 마크업에 부가적인 의미를 줍니다. 태그 이름만으로도 어떤 종류의 정보를 담고 있는지 나타낼 수 있고, 이는 콘텐츠에 의미론적 의미를 추가했습니다. 보조 기술은 이 정보를 접근하여 사용자들에게 더 나은 페이지 요약 혹은 탐색 선택지를 제공해줄 수 있습니다.
 
-The `main` element is used to wrap (you guessed it) the main content, and there should be only one per page. It's meant to surround the information related to your page's central topic. It's not meant to include items that repeat across pages, like navigation links or banners.
+`main` 요소는 주된 콘텐츠를 래핑하는데 사용되고, 한 페이지 당 하나만 있어야 합니다. 페이지의 주된 주제와 연관된 내용을 둘러싸는데 사용됩니다. 탐색 링크나 배너처럼 페이지 간 반복되는 항목들을 포함하기 위한 것이 아닙니다.
 
-The `main` tag also has an embedded landmark feature that assistive technology can use to navigate to the main content quickly. If you've ever seen a "Jump to Main Content" link at the top of a page, using the `main` tag automatically gives assistive devices that functionality.
+`main` 태그는 보조 기술이 주된 콘텐츠로 빠르게 도달할 수 있게 해주는 내장된 랜드마크 기능이 있습니다. "Jump to Main Content" 링크를 페이지 상단에서 본 적이 있다면 `main` 태그가 보조 기기들에게 그 기능을 자동으로 줍니다.
 
 # --instructions--
 
-Camper Cat has some big ideas for his ninja weapons page. Help him set up his markup by adding opening and closing `main` tags between the `header` and `footer` (covered in other challenges). Keep the `main` tags empty for now.
+Camper Cat은 닌자 무기 페이지에 대해 몇 가지 좋은 아이디어들을 가지고 있습니다. 마크업을 설정할 수 있게 `header`와 `footer` 사이에 열고 닫는 `main` 태그들을 추가하여 도와주십시다 (다른 챌린지에서 다룬 적이 있습니다). `main` 태그는 빈칸으로 남겨둡니다.
 
 # --hints--
 
-Your code should have one `main` tag.
+`main` 태그가 하나여야 합니다.
 
 ```js
 assert($('main').length == 1);
 ```
 
-The `main` tags should be between the closing `header` tag and the opening `footer` tag.
+`main` 태그들은 닫는 `header` 태그와 여는 `footer` 태그 사이에 있어야 합니다.
 
 ```js
 assert(code.match(/<\/header>\s*?<main>\s*?<\/main>/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/know-when-alt-text-should-be-left-blank.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/know-when-alt-text-should-be-left-blank.md
index 695445ea37e..06e25c332f5 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/know-when-alt-text-should-be-left-blank.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/know-when-alt-text-should-be-left-blank.md
@@ -1,6 +1,6 @@
 ---
 id: 587d774c367417b2b2512a9d
-title: Know When Alt Text Should be Left Blank
+title: Alt 텍스트가 빈칸이어야 되는 때를 파악하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cM9P4t2'
 forumTopicId: 301019
@@ -9,31 +9,31 @@ dashedName: know-when-alt-text-should-be-left-blank
 
 # --description--
 
-In the last challenge, you learned that including an `alt` attribute when using `img` tags is mandatory. However, sometimes images are grouped with a caption already describing them, or are used for decoration only. In these cases, `alt` text may seem redundant or unnecessary.
+지난 챌린지에서 `img` 태그들을 사용하려면 `alt` 속성을 필수적으로 포함해야 되는 것을 배웠습니다. 하지만 어떤 경우에는 이미지를 설명하는 캡션과 함께 그룹화되거나 장식용으로만 사용되기도 합니다. 이런 경우들에는 `alt` 텍스트가 중복되거나 불필요해 보일 수 있습니다.
 
-When an image is already explained with text content or does not add meaning to a page, the `img` still needs an `alt` attribute, but it can be set to an empty string. Here's an example:
+한 사진이 텍스트 내용으로 이미 설명되어 있거나 페이지에 도움이 되지 않을 시 `img`는 여전히 `alt` 속성이 필요하지만 빈 문자열로 설정할 수 있습니다. 여기 예시가 있습니다.
 
 ```html
 <img src="visualDecoration.jpeg" alt="">
 ```
 
-Background images usually fall under the 'decorative' label as well. However, they are typically applied with CSS rules, and therefore not part of the markup screen readers process.
+배경 이미지들은 보통 '장식 용도' 로 분류가 됩니다. 그러나 이런 배경 이미지는 보통 CSS 규칙에 의해 적용되므로 마크업 화면 낭독 프로세스의 일부가 아닙니다.
 
-**Note:** For images with a caption, you may still want to include `alt` text since it helps search engines catalog the image's content.
+**참고:** 캡션이 있는 사진들의 경우, 검색 엔진이 사진의 내용을 카탈로그화하는 데 도와주기 위해서 `alt` 텍스트를 포함하는 것을 추천합니다.
 
 # --instructions--
 
-Camper Cat has coded a skeleton page for the blog part of his website. He's planning to add a visual break between his two articles with a decorative image of a samurai sword. Add an `alt` attribute to the `img` tag and set it to an empty string. (Note that the image `src` doesn't link to an actual file - don't worry that there are no swords showing in the display.)
+Camper Cat은 자신 웹사이트의 블로그 부분을 위한 뼈대 페이지를 코딩했습니다. 그는 두 개의 기사 사이에 사무라이 검 사진으로 시각적인 구분을 추가하려고 있습니다. `img` 태그에 `alt` 속성을 추가한 뒤 빈 문자열로 설정합니다. (이미지 `src` 실제 파일에 링크되지 않으니 검들이 화면에 나타나지 않아도 걱정할 필요없다는 점 참고하시기 바랍니다.)
 
 # --hints--
 
-Your `img` tag should have an `alt` attribute.
+`img` 태그는 `alt` 속성이 있어야 합니다.
 
 ```js
 assert(!($('img').attr('alt') == undefined));
 ```
 
-The `alt` attribute should be set to an empty string.
+`alt` 속성은 빈 문자열로 설정되어야 합니다.
 
 ```js
 assert($('img').attr('alt') == '');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-elements-only-visible-to-a-screen-reader-by-using-custom-css.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-elements-only-visible-to-a-screen-reader-by-using-custom-css.md
index 63bfea4b75c..ffc67ed4145 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-elements-only-visible-to-a-screen-reader-by-using-custom-css.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-elements-only-visible-to-a-screen-reader-by-using-custom-css.md
@@ -1,6 +1,6 @@
 ---
 id: 587d778d367417b2b2512aaa
-title: Make Elements Only Visible to a Screen Reader by Using Custom CSS
+title: CSS를 사용하여 화면 낭독기에서만 요소가 보이도록 만들어보세요.
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cJ8QGkhJ'
 forumTopicId: 301020
@@ -9,11 +9,11 @@ dashedName: make-elements-only-visible-to-a-screen-reader-by-using-custom-css
 
 # --description--
 
-Have you noticed that all of the applied accessibility challenges so far haven't used any CSS? This shows the importance of using a logical document outline and semantically meaningful tags around your content before introducing the visual design aspect.
+지금까지 적용된 모든 접근성 도전 과제에서 CSS를 사용하지 않았다는 것을 알아채셨나요? 이것은 시각적 디자인 측면을 생각해보기 전에 먼저 콘텐츠에서 논리적인 문서 개요와 시맨틱적으로 의미있는 태그를 사용하는 것에 대한 중요성을 보여줍니다.
 
-However, CSS's magic can also improve accessibility on your page when you want to visually hide content meant only for screen readers. This happens when information is in a visual format (like a chart), but screen reader users need an alternative presentation (like a table) to access the data. CSS is used to position the screen reader-only elements off the visual area of the browser window.
+그러나 CSS는 화면 낭독기 전용으로 의도된 콘텐츠를 화면에서는 보이지 않도록 숨기면서 페이지의 접근성을 향상시킬 수도 있습니다. 차트처럼 시각적으로 제공되는 정보에 대해서 화면 낭독기 사용자는 이를 대체할 수 있는 표와 같은 형식의 정보가 필요한데 이런 경우에 유용하게 쓰일 수 있습니다. CSS는 화면 낭독기 전용 요소를 브라우저의 시각적 영역 밖에 배치하는 데(브라우저 창 안에서는 보이지 않도록) 사용됩니다.
 
-Here's an example of the CSS rules that accomplish this:
+다음은 이를 구현하는 CSS 규칙의 예입니다:
 
 ```css
 .sr-only {
@@ -26,38 +26,38 @@ Here's an example of the CSS rules that accomplish this:
 }
 ```
 
-**Note:** The following CSS approaches will NOT do the same thing:
+**참고:** 다음 CSS 방법들은 동일한 작업을 수행하지 않습니다.
 
 <ul>
-<li><code>display: none;</code> or <code>visibility: hidden;</code> hides content for everyone, including screen reader users</li>
-<li>Zero values for pixel sizes, such as <code>width: 0px; height: 0px;</code> removes that element from the flow of your document, meaning screen readers will ignore it</li>
+<li><code>display: none;</code> 또는 <code>visibility: hidden;</code>은 화면 낭독기 사용자를 포함한 모든 사용자에게 콘텐츠를 숨깁니다.</li>
+<li>픽셀 크기를 0으로 만드는 경우, 예를 들어 <code>width: 0px; height: 0px;</code>은 해당 요소를 문서의 흐름에서 제거하므로 화면 낭독기에서 무시됩니다.</li>
 </ul>
 
 # --instructions--
 
-Camper Cat created a really cool stacked bar chart for his training page, and put the data into a table for his visually impaired users. The table already has an `sr-only` class, but the CSS rules aren't filled in yet. Give the `position` an `absolute` value, the `left` a `-10000px` value, and the `width` and `height` both `1px` values.
+캠퍼 캣은 그의 훈련 페이지에 쌓여있는 멋진 막대 차트를 만들었고 시각적으로 장애가 있는 사용자를 위해 데이터를 표로 정리했습니다. 표에는 이미 `sr-only` 클래스가 지정되어 있지만 아직 CSS 규칙이 작성되지 않았습니다. `position` 속성에 `absolute` 값을, `left`에 `-10000px` 값을, 그리고 `width`와 `height`에 각각 `1px` 값을 지정하세요.
 
 # --hints--
 
-Your code should set the `position` property of the `sr-only` class to a value of `absolute`.
+코드에서 `sr-only` 클래스의 `position` 속성 값을 `absolute` 로 설정해야 합니다.
 
 ```js
 assert($('.sr-only').css('position') == 'absolute');
 ```
 
-Your code should set the `left` property of the `sr-only` class to a value of `-10000px`.
+코드에서 `sr-only` 클래스의 `left` 속성 값을 `-10000px` 로 설정해야 합니다.
 
 ```js
 assert($('.sr-only').css('left') == '-10000px');
 ```
 
-Your code should set the `width` property of the `sr-only` class to a value of `1` pixel.
+코드에서 `sr-only` 클래스의 `width` 속성 값을 `1`픽셀로 설정해야 합니다.
 
 ```js
 assert(code.match(/width:\s*?1px/gi));
 ```
 
-Your code should set the `height` property of the `sr-only` class to a value of `1` pixel.
+코드에서 `sr-only` 클래스의 `height` 속성 값을 `1`픽셀로 설정해야 합니다.
 
 ```js
 assert(code.match(/height:\s*?1px/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-links-navigable-with-html-access-keys.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-links-navigable-with-html-access-keys.md
index ba72f6d7976..477fceef719 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-links-navigable-with-html-access-keys.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-links-navigable-with-html-access-keys.md
@@ -1,6 +1,6 @@
 ---
 id: 587d7790367417b2b2512aaf
-title: Make Links Navigable with HTML Access Keys
+title: HTML Access Keys를 사용하여 링크를 탐색 가능하게 만들기.
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cQvmaTp'
 forumTopicId: 301021
@@ -9,11 +9,11 @@ dashedName: make-links-navigable-with-html-access-keys
 
 # --description--
 
-HTML offers the `accesskey` attribute to specify a shortcut key to activate or bring focus to an element. Adding an `accesskey` attribute can make navigation more efficient for keyboard-only users.
+HTML은 요소를 활성화하거나 요소에 초점을 맞추기 위한 단축키를 지정하기 위해 `accesskey` 속성을 제공합니다. `accesskey` 속성을 추가하면 키보드만 사용하는 사용자들이 더 효율적으로 탐색이 가능해집니다.
 
-HTML5 allows this attribute to be used on any element, but it's particularly useful when it's used with interactive ones. This includes links, buttons, and form controls.
+HTML5에서는 이 속성을 모든 요소에 사용할 수 있지만, 상호작용하는 요소와 함께 사용될 때 특히 유용합니다. 이것은 링크, 버튼 및 양식 컨트롤을 포함합니다.
 
-Here's an example:
+여기 예시가 있습니다.
 
 ```html
 <button accesskey="b">Important Button</button>
@@ -21,29 +21,29 @@ Here's an example:
 
 # --instructions--
 
-Camper Cat wants the links around the two blog article titles to have keyboard shortcuts so his site's users can quickly navigate to the full story. Add an `accesskey` attribute to both links and set the first one to `g` (for Garfield) and the second one to `c` (for Chuck Norris).
+캠퍼 캣은 자신의 사이트 사용자가 빠르게 본문으로 이동할 수 있도록 두 개의 블로그 기사 제목 주변에 있는 링크에 키보드 단축키를 더하고 싶습니다. 첫 번째 링크에는 `g` (Garfield의 "g")로, 두 번째 링크에는 `c` (Chuck Norris의 "c")로 `accesskey` 속성을 추가하세요.
 
 # --hints--
 
-Your code should add an `accesskey` attribute to the `a` tag with the `id` of `first`.
+코드에서 `a` 태그에 `id`가 `first`인 `accesskey` 속성을 추가해야 합니다.
 
 ```js
 assert($('#first').attr('accesskey'));
 ```
 
-Your code should add an `accesskey` attribute to the `a` tag with the `id` of `second`.
+코드에서 `a` 태그에 `id`가 `second`인 `accesskey` 속성을 추가해야 합니다.
 
 ```js
 assert($('#second').attr('accesskey'));
 ```
 
-Your code should set the `accesskey` attribute on the `a` tag with the `id` of `first` to `g`. Note that case matters.
+코드에서 `id`가 `first`인 `a` 태그의 `accesskey` 속성을 `g`로 설정해야 합니다. 대소문자가 영향을 미친다는 사실을 주의하세요.
 
 ```js
 assert($('#first').attr('accesskey') == 'g');
 ```
 
-Your code should set the `accesskey` attribute on the `a` tag with the `id` of `second` to `c`. Note that case matters.
+코드에서 `id`가 `second`인 `a` 태그에 `accesskey` 속성을 `c`로 설정해야 합니다. 대소문자가 영향을 미친다는 사실을 주의하세요.
 
 ```js
 assert($('#second').attr('accesskey') == 'c');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-footer-landmark.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-footer-landmark.md
index 3330ea186d7..6491b45db8a 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-footer-landmark.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-footer-landmark.md
@@ -1,6 +1,6 @@
 ---
 id: 587d7788367417b2b2512aa3
-title: Make Screen Reader Navigation Easier with the footer Landmark
+title: 화면 낭독기 탐색을 더욱 쉽게 만들어주는 푸터 랜드마크
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/crVrDh8'
 forumTopicId: 301022
@@ -9,27 +9,27 @@ dashedName: make-screen-reader-navigation-easier-with-the-footer-landmark
 
 # --description--
 
-Similar to `header` and `nav`, the `footer` element has a built-in landmark feature that allows assistive devices to quickly navigate to it. It's primarily used to contain copyright information or links to related documents that usually sit at the bottom of a page.
+`header`와 `nav` 요소와 마찬가지로, `footer` 요소 또한 보조 장치가 빠르게 탐색할 수 있도록 내장된 랜드마크 기능을 가지고 있습니다. `footer` 요소는 주로 페이지 하단에 위치하며 대개 저작권 정보나 관련 문서 링크를 포함하는 데 사용됩니다.
 
 # --instructions--
 
-Camper Cat's training page is making good progress. Change the `div` he used to wrap his copyright information at the bottom of the page to a `footer` element.
+캠퍼 캣은 훈련을 위한 웹 페이지를 만들고 있습니다. 페이지 하단의 저작권 정보를 감싸고 있는 `div` 를`footer` 요소로 바꿔주세요.
 
 # --hints--
 
-Your code should have one `footer` tag.
+코드에는 `footer` 태그가 하나만 있어야 합니다.
 
 ```js
 assert($('footer').length == 1);
 ```
 
-Your code should not have any `div` tags.
+코드에는 `div` 태그가 하나도 없어야 합니다.
 
 ```js
 assert($('div').length == 0);
 ```
 
-Your code should have an opening and closing `footer` tag.
+코드에는 여는 `footer` 태그와 닫는 `footer` 태그가 하나씩 있어야 합니다.
 
 ```js
 assert(code.match(/<footer>\s*&copy; 2018 Camper Cat\s*<\/footer>/g));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-header-landmark.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-header-landmark.md
index 152e4e3ff45..ddb640c845f 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-header-landmark.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-header-landmark.md
@@ -1,6 +1,6 @@
 ---
 id: 587d7787367417b2b2512aa1
-title: Make Screen Reader Navigation Easier with the header Landmark
+title: 화면 낭독기 탐색을 더욱 쉽게 만들어주는 헤더 랜드마크
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cB76vtv'
 forumTopicId: 301023
@@ -9,37 +9,37 @@ dashedName: make-screen-reader-navigation-easier-with-the-header-landmark
 
 # --description--
 
-The next HTML5 element that adds semantic meaning and improves accessibility is the `header` tag. It's used to wrap introductory information or navigation links for its parent tag and works well around content that's repeated at the top on multiple pages.
+다음의 HTML5 요소는 시맨틱적인 의미를 추가하고 접근성을 향상시키는 `header` 태그입니다. 이 태그는 부모 태그에 대한 소개 정보나 네비게이션 링크를 감싸는 데 사용되며 여러 페이지의 상단에 반복되는 내용 주변에 잘 작동합니다.
 
-`header` shares the embedded landmark feature you saw with `main`, allowing assistive technologies to quickly navigate to that content.
+`header`는 `main`에서 보았던 내장 랜드마크 기능을 공유하여 접근성 기기가 해당 콘텐츠로 빠르게 이동할 수 있게 합니다.
 
-**Note:** The `header` is meant for use in the `body` tag of your HTML document. It is different than the `head` element, which contains the page's title, meta information, etc.
+**참고:** `header`는 HTML 문서의 `body` 태그 안에서 사용하도록 의도된 태그입니다. 이 요소는 페이지 제목, 메타 정보 등을 포함하는 `head` 요소와는 다릅니다.
 
 # --instructions--
 
-Camper Cat is writing some great articles about ninja training, and wants to add a page for them to his site. Change the top `div` that currently contains the `h1` to a `header` tag instead.
+캠퍼 캣은 닌자 트레이닝에 관한 멋진 기사들을 쓰고, 그를 위한 페이지를 자신의 사이트에 추가하고 싶어합니다. 현재 맨 위에 있는 `h1`을 포함하고 있는 `div`를 `header` 태그로 변경하세요.
 
 # --hints--
 
-Your code should have one `header` tag.
+코드에는 `header` 태그가 하나만 있어야 합니다.
 
 ```js
 assert($('header').length == 1);
 ```
 
-Your `header` tags should wrap around the `h1`.
+`header` 태그는 `h1`을 감싸야 합니다.
 
 ```js
 assert($('header').children('h1').length == 1);
 ```
 
-Your code should not have any `div` tags.
+`div` 태그는 하나도 없어야 합니다.
 
 ```js
 assert($('div').length == 0);
 ```
 
-Your `header` element should have a closing tag.
+`header` 요소는 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-nav-landmark.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-nav-landmark.md
index 906d7dd5c83..bd9bb8e9eaf 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-nav-landmark.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/make-screen-reader-navigation-easier-with-the-nav-landmark.md
@@ -1,6 +1,6 @@
 ---
 id: 587d7788367417b2b2512aa2
-title: Make Screen Reader Navigation Easier with the nav Landmark
+title: 화면 낭독기 탐색을 더욱 쉽게 만들어주는 내비게이션 랜드마크
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/czVwWSv'
 forumTopicId: 301024
@@ -9,35 +9,35 @@ dashedName: make-screen-reader-navigation-easier-with-the-nav-landmark
 
 # --description--
 
-The `nav` element is another HTML5 item with the embedded landmark feature for easy screen reader navigation. This tag is meant to wrap around the main navigation links in your page.
+`nav` 요소는 화면 낭독기 내비게이션을 위한 내장된 랜드마크 기능을 가진 또 다른 HTML5 항목입니다. 이 태그는 페이지의 주요 내비게이션 링크를 감싸기 위해 사용됩니다.
 
-If there are repeated site links at the bottom of the page, it isn't necessary to markup those with a `nav` tag as well. Using a `footer` (covered in the next challenge) is sufficient.
+페이지 하단에 반복되는 사이트 링크가 있다면, 해당 부분은 `nav` 태그로 표시할 필요가 없습니다. `footer` 태그만 사용하더라도 충분합니다 (다음 도전 과제에서 다룰 예정입니다).
 
 # --instructions--
 
-Camper Cat included navigation links at the top of his training page, but wrapped them in a `div`. Change the `div` to a `nav` tag to improve the accessibility on his page.
+캠퍼캣은 훈련 페이지 상단에 네비게이션 링크를 포함시켰지만, 이를 `div`로 감쌌습니다. 이 페이지의 접근성을 향상시키기 위해 `div`를 `nav` 태그로 변경하세요.
 
 # --hints--
 
-Your code should have one `nav` tag.
+`nav` 태그는 하나만 있어야 합니다.
 
 ```js
 assert($('nav').length == 1);
 ```
 
-Your `nav` tags should wrap around the `ul` and its list items.
+`nav` 태그는 `ul`과 그에 따른 리스트 아이템들을 둘러싸야 합니다.
 
 ```js
 assert($('nav').children('ul').length == 1);
 ```
 
-Your code should not have any `div` tags.
+`div` 태그는 하나도 없어야 합니다.
 
 ```js
 assert($('div').length == 0);
 ```
 
-Your `nav` element should have a closing tag.
+`nav` 요소에는 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/standardize-times-with-the-html5-datetime-attribute.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/standardize-times-with-the-html5-datetime-attribute.md
index d9318d50f7b..8cab1e047fd 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/standardize-times-with-the-html5-datetime-attribute.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/standardize-times-with-the-html5-datetime-attribute.md
@@ -1,6 +1,6 @@
 ---
 id: 587d778c367417b2b2512aa9
-title: Standardize Times with the HTML5 datetime Attribute
+title: HTML5의 datetime 속성을 사용하여 시간을 표준화하세요.
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cmzMgtz'
 forumTopicId: 301025
@@ -9,9 +9,9 @@ dashedName: standardize-times-with-the-html5-datetime-attribute
 
 # --description--
 
-Continuing with the date theme, HTML5 also introduced the `time` element along with a `datetime` attribute to standardize times. The `time` element is an inline element that can wrap a date or time on a page. A `datetime` attribute holds a valid format of that date. This is the value accessed by assistive devices. It helps avoid confusion by stating a standardized version of a time, even if it's informally or colloquially written in the text.
+날짜 주제를 이어가자면, HTML5에서는 `datetime` 속성과 함께 `time` 요소를 소개하여 시간을 표준화했습니다. `time` 요소는 페이지에서 날짜 또는 시간을 감쌀 수 있는 인라인 요소입니다. `datetime` 속성은 해당 날짜의 유효한 형식을 저장합니다. 이 값은 접근성 기기에서 액세스할 수 있습니다. 이것은 텍스트에서 표준어가 아니거나 대화체로 쓰여진 시간의 표준화된 버전을 나타내어 혼란을 방지하는 데 도움이 됩니다.
 
-Here's an example:
+여기 예시가 있습니다.
 
 ```html
 <p>Master Camper Cat officiated the cage match between Goro and Scorpion <time datetime="2013-02-13">last Wednesday</time>, which ended in a draw.</p>
@@ -19,17 +19,17 @@ Here's an example:
 
 # --instructions--
 
-Camper Cat's Mortal Kombat survey results are in! Wrap a `time` tag around the text `Thursday, September 15<sup>th</sup>` and add a `datetime` attribute to it set to `2016-09-15`.
+캠퍼 캣의 모탈 컴뱃 설문 조사 결과가 나왔습니다! 주어진 텍스트인 `Thursday, September 15<sup>th</sup>`를 `time` 태그로 감싸고 `datetime` 속성을 `2016-09-15`로 설정하세요.
 
 # --hints--
 
-Your code should have a `p` element which includes the text `Thank you to everyone for responding to Master Camper Cat's survey.` and include a `time` element.
+코드에는 `p` 요소가 있어야 하며 그 안에는 텍스트 `Thank you to everyone for responding to Master Camper Cat's survey.`와 `time` 요소를 포함해야 합니다.
 
 ```js
 assert(timeElement);
 ```
 
-Your added `time` tags should wrap around the text `Thursday, September 15<sup>th</sup>`.
+추가한 `time` 태그는 텍스트 `Thursday, September 15<sup>th</sup>`을 감싸야 합니다.
 
 ```js
 assert(
@@ -38,13 +38,13 @@ assert(
 );
 ```
 
-Your added `time` tag should have a `datetime` attribute that is not empty.
+`time` 태그에는 `datetime` 속성이 있어야 하며, 이 속성은 비어있으면 안 됩니다.
 
 ```js
 assert(datetimeAttr && datetimeAttr?.length);
 ```
 
-Your added `datetime` attribute should be set to a value of `2016-09-15`.
+추가한 `datetime` 속성은 `2016-09-15`로 설정되어야 합니다.
 
 ```js
 assert(datetimeAttr === '2016-09-15');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/use-headings-to-show-hierarchical-relationships-of-content.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/use-headings-to-show-hierarchical-relationships-of-content.md
index fbb95eaf6b1..59bdf1d80b3 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/use-headings-to-show-hierarchical-relationships-of-content.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/use-headings-to-show-hierarchical-relationships-of-content.md
@@ -1,6 +1,6 @@
 ---
 id: 587d774d367417b2b2512a9e
-title: Use Headings to Show Hierarchical Relationships of Content
+title: 콘텐츠의 계층적 관계를 보여주기 위해 헤딩 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cqVEktm'
 forumTopicId: 301026
@@ -9,43 +9,43 @@ dashedName: use-headings-to-show-hierarchical-relationships-of-content
 
 # --description--
 
-Headings (`h1` through `h6` elements) are workhorse tags that help provide structure and labeling to your content. Screen readers can be set to read only the headings on a page so the user gets a summary. This means it is important for the heading tags in your markup to have semantic meaning and relate to each other, not be picked merely for their size values.
+헤딩(`h1`부터 `h6` 요소)은 콘텐츠에 구조와 레이블을 제공하는 중요한 태그입니다. 스크린 리더는 페이지에서 제목만 읽도록 설정될 수 있어 사용자에게 요약 정보를 제공합니다. 마크업에서 사용하는 헤딩 태그는 시맨틱적인 의미를 지니고 있고 서로 관련이 있어야 하며, 크기 값만을 고려하여 선택되어서는 안 됩니다.
 
-*Semantic meaning* means that the tag you use around content indicates the type of information it contains.
+*시맨틱적 의미*란 컨텐츠를 포함하는 태그가 해당 정보의 유형을 나타낸다는 것을 의미합니다.
 
-If you were writing a paper with an introduction, a body, and a conclusion, it wouldn't make much sense to put the conclusion as a subsection of the body in your outline. It should be its own section. Similarly, the heading tags in a webpage need to go in order and indicate the hierarchical relationships of your content.
+만약 소개, 본문, 결론으로 이루어진 논문을 작성한다면, 본문의 한 부분으로 결론을 넣는 것은 말이 되지 않을 것입니다. 이는 자체적인 섹션으로 나뉘어져야 합니다. 마찬가지로, 웹페이지의 헤딩 태그는 순서대로 쓰여야 하며 콘텐츠의 계층적인 관계를 나타내어야 합니다.
 
-Headings with equal (or higher) rank start new implied sections, headings with lower rank start subsections of the previous one.
+동일한 (또는 더 높은) 순위의 헤딩은 새로운 섹션이 시작하리라는 것을 암시하고, 더 낮은 순위의 제목은 이전 섹션의 하위 섹션을 시작합니다.
 
-As an example, a page with an `h2` element followed by several subsections labeled with `h4` elements would confuse a screen reader user. With six choices, it's tempting to use a tag because it looks better in a browser, but you can use CSS to edit the relative sizing.
+예를 들어 설명하자면, `h2` 요소로 시작한 페이지에 여러 하위 섹션이 `h4` 요소로 표시된 경우, 스크린 리더 사용자가 혼란스러워 할 수 있습니다. 여섯 가지 선택지가 있기 때문에 브라우저에서 더 잘 보일만한 태그를 사용하고 싶을 수 있지만, 상대적인 크기를 편집하기 위해서는 CSS를 사용하면 됩니다.
 
-One final point, each page should always have one (and only one) `h1` element, which is the main subject of your content. This and the other headings are used in part by search engines to understand the topic of the page.
+마지막으로, 각 페이지에는 항상 하나의 (`h1`) 요소만 있어야 하며, 이는 콘텐츠의 주요 주제입니다. 이런 헤딩들은 검색 엔진이 페이지의 주제를 이해하는 데 일부 사용됩니다.
 
 # --instructions--
 
-Camper Cat wants a page on his site dedicated to becoming a ninja. Help him fix the headings so his markup gives semantic meaning to the content, and shows the proper parent-child relationships of his sections. Change all the `h5` tags to the proper heading level to indicate they are subsections of the `h2` ones. Use `h3` tags for the purpose.
+캠퍼 캣은 자신의 사이트에 닌자가 되는 방법을 담고 있는 페이지를 원합니다. 헤딩을 수정하여 마크업이 시맨틱적 의미를 갖고 또 태그들이 올바른 부모-자식 관계를 나타낼 수 있도록 캠퍼 캣을 도와주세요. 모든 `h5` 태그를 올바른 헤딩 레벨로 변경하여 `h2` 제목의 하위 섹션임을 나타내세요. 이를 위해서 `h3` 태그를 사용하세요.
 
 # --hints--
 
-Your code should have 6 `h3` elements.
+코드에는 6개의 `h3` 요소가 있어야 합니다.
 
 ```js
 assert($('h3').length === 6);
 ```
 
-Your code should have 6 `h3` closing tags.
+코드에는 6개의 `h3` 닫는 태그가 있어야 합니다.
 
 ```js
 assert((code.match(/\/h3/g) || []).length === 6);
 ```
 
-Your code should not have any `h5` elements.
+`h5` 태그는 하나도 없어야 합니다.
 
 ```js
 assert($('h5').length === 0);
 ```
 
-Your code should not have any `h5` closing tags.
+`h5`의 닫는 태그는 하나도 없어야 합니다.
 
 ```js
 assert(/\/h5/.test(code) === false);
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/use-tabindex-to-add-keyboard-focus-to-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/use-tabindex-to-add-keyboard-focus-to-an-element.md
index 0ae730fc94b..e4dcebc8496 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/use-tabindex-to-add-keyboard-focus-to-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/use-tabindex-to-add-keyboard-focus-to-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: 587d7790367417b2b2512ab0
-title: Use tabindex to Add Keyboard Focus to an Element
+title: 요소에 키보드 포커스를 추가하기 위해 tabindex 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cmzMDHW'
 forumTopicId: 301027
@@ -9,29 +9,29 @@ dashedName: use-tabindex-to-add-keyboard-focus-to-an-element
 
 # --description--
 
-The HTML `tabindex` attribute has three distinct functions relating to an element's keyboard focus. When it's on a tag, it indicates that the element can be focused on. The value (an integer that's positive, negative, or zero) determines the behavior.
+HTML `tabindex` 속성은 요소의 키보드 포커스와 연관된 세 가지 다른 기능들을 가지고 있습니다. 태그에 있을 시 요소에 초점을 맞출 수 있다는 것을 나타냅니다. 정수 값에 따라 동작이 결정됩니다.
 
-Certain elements, such as links and form controls, automatically receive keyboard focus when a user tabs through a page. It's in the same order as the elements come in the HTML source markup. This same functionality can be given to other elements, such as `div`, `span`, and `p`, by placing a `tabindex="0"` attribute on them. Here's an example:
+링크, 폼 제어와 같은 특정 요소들은 사용자가 페이지를 탐색할 때 자동으로 키보드 포커스를 받습니다. 순서는 HTML 소스 마크업에 요소들이 오는 순서와 같습니다. `div`, `span`, `p`와 같은 다른 요소들에도 `tabindex="0"` 속성을 적용하면 동일한 기능을 부여할 수 있습니다. 여기 예시가 있습니다.
 
 ```html
 <div tabindex="0">I need keyboard focus!</div>
 ```
 
-**Note:** A negative `tabindex` value (typically -1) indicates that an element is focusable, but is not reachable by the keyboard. This method is generally used to bring focus to content programmatically (like when a `div` used for a pop-up window is activated), and is beyond the scope of these challenges.
+**참고:** 음수값의 `tabindex` (통상적으로 -1) 를 사용하면 요소가 포커스를 받을 수 있지만 키보드로 접근할 수는 없습니다. 이 방법은 일반적으로 프로그래밍 방식으로 콘텐츠에 초점을 가져오기 위해 사용되며 (팝업 창에 사용되는 `div`가 활성화될 때처럼) 챌린지의 범위를 벗어납니다.
 
 # --instructions--
 
-Camper Cat created a new survey to collect information about his users. He knows input fields automatically get keyboard focus, but he wants to make sure his keyboard users pause at the instructions while tabbing through the items. Add a `tabindex` attribute to the `p` tag and set its value to `0`. Bonus - using `tabindex` also enables the CSS pseudo-class `:focus` to work on the `p` tag.
+Camper Cat은 사용자들에 대한 정보를 모으기 위한 새로운 설문조사를 만들었습니다. 입력 필드는 자동으로 키보드 포커스를 받는 걸 알지만 키보드 사용자들이 항목들을 탐색하는 동안 지시 사항에서 멈추길 바랍니다. `tabindex` 속성을 `p` 태그에 더하고 `0`으로 설정합니다. 보너스 - `tabindex`를 사용하면 CSS 가상 클래스 `:focus`가 `p` 태그에서도 작동되게 합니다.
 
 # --hints--
 
-Your code should add a `tabindex` attribute to the `p` tag that holds the form instructions.
+폼 지침을 보유한 `p` 태그에 `tabindex` 속성을 추가해야합니다.
 
 ```js
 assert($('p').attr('tabindex'));
 ```
 
-Your code should set the `tabindex` attribute on the `p` tag to a value of 0.
+`p` 태그에 있는 `tabindex` 속성값은 0 이어야 합니다.
 
 ```js
 assert($('p').attr('tabindex') == '0');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/use-tabindex-to-specify-the-order-of-keyboard-focus-for-several-elements.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/use-tabindex-to-specify-the-order-of-keyboard-focus-for-several-elements.md
index 2ff85219755..c9eb8924eb7 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/use-tabindex-to-specify-the-order-of-keyboard-focus-for-several-elements.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/use-tabindex-to-specify-the-order-of-keyboard-focus-for-several-elements.md
@@ -1,6 +1,6 @@
 ---
 id: 587d7790367417b2b2512ab1
-title: Use tabindex to Specify the Order of Keyboard Focus for Several Elements
+title: 여러 요소들의 키보드 포커스 순서를 tabindex를 활용하여 지정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cmzRRcb'
 forumTopicId: 301028
@@ -9,13 +9,13 @@ dashedName: use-tabindex-to-specify-the-order-of-keyboard-focus-for-several-elem
 
 # --description--
 
-The `tabindex` attribute also specifies the exact tab order of elements. This is achieved when the attribute's value is set to a positive number of 1 or higher.
+`tabindex` 속성은 요소들의 정확한 탭 순서를 지정합니다. 이는 속성값이 1과 같거나 큰 양수로 설정되어있을 때 달성됩니다.
 
-Setting a `tabindex="1"` will bring keyboard focus to that element first. Then it cycles through the sequence of specified `tabindex` values (2, 3, etc.), before moving to default and `tabindex="0"` items.
+`tabindex="1"`을 설정하면 해당 요소부터 키보드 포커스가 됩니다. 특정 `tabindex` 값(2, 3, 등등) 들의 순서를 지나간 후 기본값과 `tabindex="0"` 항목들로 이동합니다.
 
-It's important to note that when the tab order is set this way, it overrides the default order (which uses the HTML source). This may confuse users who are expecting to start navigation from the top of the page. This technique may be necessary in some circumstances, but in terms of accessibility, take care before applying it.
+탭의 순서가 이렇게 설정되었을 시 HTML 소스를 활용하는 기존 순서는 덮어씌워진다는 점을 기억하세요. 이는 페이지 상단부터 탐색을 시작할 것이라고 예상하는 사용자들을 혼란시킬 수 있습니다. 상황에 따라 이 기술이 필요할 수도 있지만 접근성 측면에서 봤을 때 적용하기 전 주의를 기울여야 합니다.
 
-Here's an example:
+여기 예시가 있습니다.
 
 ```html
 <div tabindex="1">I get keyboard focus, and I get it first!</div>
@@ -27,31 +27,31 @@ Here's an example:
 
 # --instructions--
 
-Camper Cat has a search field on his Inspirational Quotes page that he plans to position in the upper right corner with CSS. He wants the search `input` and submit `input` form controls to be the first two items in the tab order. Add a `tabindex` attribute set to `1` to the `search` `input`, and a `tabindex` attribute set to `2` to the `submit` `input`.
+캠퍼 캣은 인상적인 명언 페이지에 검색 필드를 CSS로 우측 최상단에 배치하고 싶어합니다. 검색 `input`과 제출 `input` 폼 제어가 탭 순서에서 최우선이어야 합니다. `1`로 설정된 `tabindex` 속성을 `search` `input`에 추가하고 `2`로 설정된 `tabindex` 속성을 `submit` `input`에 추가합니다.
 
-Another thing to note is that some browsers may place you in the middle of your tab order when an element is clicked. An element has been added to the page that ensures you will always start at the beginning of your tab order.
+또 다른 주의할 사항은 일부 브라우저들은 요소를 클릭했을 때 탭 순서의 중간에 배치될 수 있다는 점입니다. 탭 순서의 처음에서 항상 시작하게 해주는 요소가 페이지에 추가되었습니다.
 
 # --hints--
 
-Your code should add a `tabindex` attribute to the `search` `input` tag.
+`tabindex` 속성을 `search` `input` 태그에 추가해야 합니다.
 
 ```js
 assert($('#search').attr('tabindex'));
 ```
 
-Your code should add a `tabindex` attribute to the `submit` `input` tag.
+`tabindex` 속성을 `submit` `input` 태그에 추가해야 합니다.
 
 ```js
 assert($('#submit').attr('tabindex'));
 ```
 
-Your code should set the `tabindex` attribute on the `search` `input` tag to a value of 1.
+`search` `input` 태그에 있는 `tabindex` 속성을 1로 설정해야 합니다.
 
 ```js
 assert($('#search').attr('tabindex') == '1');
 ```
 
-Your code should set the `tabindex` attribute on the `submit` `input` tag to a value of 2.
+`submit` `input` 태그에 있는 `tabindex` 속성을 2로 설정해야 합니다.
 
 ```js
 assert($('#submit').attr('tabindex') == '2');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/wrap-content-in-the-article-element.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/wrap-content-in-the-article-element.md
index c3c72632b7e..cd66caee9fe 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/wrap-content-in-the-article-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/wrap-content-in-the-article-element.md
@@ -1,6 +1,6 @@
 ---
 id: 587d774e367417b2b2512aa0
-title: Wrap Content in the article Element
+title: 내용을 article 요소로 감싸기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cPp79S3'
 forumTopicId: 301029
@@ -9,31 +9,29 @@ dashedName: wrap-content-in-the-article-element
 
 # --description--
 
-`article` is another one of the new HTML5 elements that add semantic meaning to your markup. `article` is a sectioning element and is used to wrap independent, self-contained content. The tag works well with blog entries, forum posts, or news articles.
+`article`은 마크업에 시맨틱적인 의미를 추가하는 HTML5 요소 중 하나입니다. `article`은 섹션 요소로서 독립적이고 자체 포함된 콘텐츠를 감싸는 데 사용됩니다. 이 태그는 블로그 글, 포럼 게시물 또는 뉴스 기사에 쓰일 수 있습니다.
 
-Determining whether content can stand alone is usually a judgment call, but you can use a couple of simple tests. Ask yourself if you removed all surrounding context, would that content still make sense? Similarly, for text, would the content hold up if it were in an RSS feed?
+콘텐츠가 독립적으로 존재할 수 있는지 판단하는 것은 주로 주관적인 판단이 필요하지만 몇 가지 간단한 시험을 해볼 수 있습니다. 주변 맥락을 모두 제거한 상태에서 해당 내용만 남겼을 때 그 내용이 여전히 의미가 있을까 스스로 질문 해보세요. 텍스트의 경우 해당 내용이 RSS 피드에 들어가 있더라도 내용이 유지될까요?
 
-Remember that folks using assistive technologies rely on organized, semantically meaningful markup to better understand your work.
+접근성 기기를 사용하는 사람들은 시맨틱적 의미를 지니는 잘 구성된 마크업이 있어야 당신의 작업을 더 잘 이해할 수 있다는 것을 기억하세요.
 
-**Note:** The `section` element is also new with HTML5, and has a slightly different semantic meaning than `article`. An `article` is for standalone content, and a `section` is for grouping thematically related content. They can be used within each other, as needed. For example, if a book is the `article`, then each chapter is a `section`. When there's no relationship between groups of content, then use a `div`.
+**참고:** `section` 요소도 HTML5에서 새로 추가되었으며, `article`과 약간 다른 의미를 가지고 있습니다. `article`은 독립적인 콘텐츠를 위한 태그이고, `section`은 주제가 관련된 콘텐츠를 묶기 위한 태그입니다. 필요한 경우에 서로 중첩하여 사용할 수 있습니다. 예를 들어, 책이 `article`이라면 각 장(chapter)은 `section`입니다. 컨텐츠 그룹 간에 관계가 없을 때는 `div`를 사용하세요.
 
-`<div>` - groups content
-`<section>` - groups related content
-`<article>` - groups independent, self-contained content
+`<div>` - 컨텐츠를 묶을 경우 `<section>` - 서로 관련된 컨텐츠를 묶을 경우 `<article>` - 독립적인 컨텐츠를 묶을 때
 
 # --instructions--
 
-Camper Cat used `article` tags to wrap the posts on his blog page, but he forgot to use them around the top one. Change the `div` tag to use an `article` tag instead.
+캠퍼 캣은 블로그 페이지의 게시물을 둘러싸기 위해 `article` 태그를 사용했지만 맨 위의 게시물 주위에는 사용하지 않았습니다. `div` 태그 대신 `article`를 사용하세요.
 
 # --hints--
 
-Your code should have three `article` tags.
+코드에는 `article` 태그가 세 개 있어야 합니다.
 
 ```js
 assert($('article').length == 3);
 ```
 
-Your code should not have any `div` tags.
+`div` 태그는 하나도 없어야 합니다.
 
 ```js
 assert($('div').length == 0);
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/wrap-radio-buttons-in-a-fieldset-element-for-better-accessibility.md b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/wrap-radio-buttons-in-a-fieldset-element-for-better-accessibility.md
index dab2077c235..4df260b0cf9 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/wrap-radio-buttons-in-a-fieldset-element-for-better-accessibility.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-accessibility/wrap-radio-buttons-in-a-fieldset-element-for-better-accessibility.md
@@ -1,6 +1,6 @@
 ---
 id: 587d778b367417b2b2512aa7
-title: Wrap Radio Buttons in a fieldset Element for Better Accessibility
+title: 라디오 버튼을 더 나은 접근성을 위해 fieldset 요소로 둘러싸기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cVJVefw'
 forumTopicId: 301030
@@ -9,13 +9,13 @@ dashedName: wrap-radio-buttons-in-a-fieldset-element-for-better-accessibility
 
 # --description--
 
-The next form topic covers the accessibility of radio buttons. Each choice is given a `label` with a `for` attribute tying to the `id` of the corresponding item as covered in the last challenge. Since radio buttons often come in a group where the user must choose one, there's a way to semantically show the choices are part of a set.
+다음 양식 주제는 라디오 버튼의 접근성에 관한 것입니다. 각 선택지는 마지막 챌린지에서 다룬 것처럼 해당 항목의 `id`와 연결된 `for` 속성이 있는 `label`이 제공됩니다. 라디오 버튼은 사용자가 하나를 선택해야 하는 그룹으로 자주 나타납니다. 선택지가 집합의 일부임을 시맨틱적으로 나타내는 방법이 있습니다.
 
-The `fieldset` tag surrounds the entire grouping of radio buttons to achieve this. It often uses a `legend` tag to provide a description for the grouping, which screen readers read for each choice in the `fieldset` element.
+이를 위해 `fieldset` 태그는 라디오 버튼의 전체 그룹을 둘러싸고 있습니다. 종종 `legend` 태그를 사용하여 그룹에 대한 설명을 제공하며, 이 설명은 화면 낭독기가 `fieldset` 요소의 각 선택 항목에 대해 읽습니다.
 
-The `fieldset` wrapper and `legend` tag are not necessary when the choices are self-explanatory, like a gender selection. Using a `label` with the `for` attribute for each radio button is sufficient.
+선택 사항이 자명한 경우(예: 성별 선택)에는 `fieldset` 래퍼 및 `legend` 태그가 필요하지 않습니다. 각 라디오 버튼에 대해 `for` 속성을 사용한 `label`을 사용하는 것만으로도 충분합니다.
 
-Here's an example:
+여기 예시가 있습니다.
 
 ```html
 <form>
@@ -33,17 +33,17 @@ Here's an example:
 
 # --instructions--
 
-Camper Cat wants information about the ninja level of his users when they sign up for his email list. He's added a set of radio buttons and learned from our last lesson to use `label` tags with `for` attributes for each choice. Go Camper Cat! However, his code still needs some help. Change the `div` tag surrounding the radio buttons to a `fieldset` tag, and change the `p` tag inside it to a `legend`.
+캠퍼 캣은 사용자가 이메일 목록에 가입할 때 사용자들의 닌자 레벨에 대한 정보를 원합니다. 캠퍼 캣은 라디오 버튼 세트를 추가했고, 지난 레슨에서 각 선택지에 `for` 속성을 가진 `label` 태그를 사용하는 방법을 배웠습니다. 캠퍼 캣 화이팅! 하지만 코드에 아직 더 나아질 수 있는 부분들이 있습니다. 라디오 버튼을 감싸고 있는 `div` 태그를 `fieldset`태그로 변경하고, 그 안의 `p` 태그를 `legend` 태그로 변경하세요.
 
 # --hints--
 
-Your code should have a `fieldset` tag around the radio button set.
+라디오 버튼 세트를 감싸는 `fieldset` 태그가 있어야 합니다.
 
 ```js
 assert($('fieldset').length == 1);
 ```
 
-The `fieldset` element should have a closing tag.
+`fieldset` 요소는 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
@@ -52,19 +52,19 @@ assert(
 );
 ```
 
-Your code should have a `legend` tag around the text asking what level ninja a user is.
+사용자가 어떤 닌자 레벨인지 묻는 텍스트를 `legend` 태그가 감싸고 있어야 합니다.
 
 ```js
 assert($('legend').length == 1);
 ```
 
-Your code should not have any `div` tags.
+`div` 태그는 하나도 없어야 합니다.
 
 ```js
 assert($('div').length == 0);
 ```
 
-Your code should no longer have a `p` tag around the text asking what level ninja a user is.
+사용자가 어떤 닌자 레벨인지 묻는 텍스트를 `p` 태그가 감싸고 있어선 안됩니다.
 
 ```js
 assert($('p').length == 4);
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/add-a-box-shadow-to-a-card-like-element.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/add-a-box-shadow-to-a-card-like-element.md
index 7879b89c2cd..023a0d0686a 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/add-a-box-shadow-to-a-card-like-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/add-a-box-shadow-to-a-card-like-element.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781b367417b2b2512abe
-title: Add a box-shadow to a Card-like Element
+title: 카드와 비슷한 엘리먼트에 box-shadow 추가하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cvVZdUd'
 forumTopicId: 301031
@@ -9,23 +9,23 @@ dashedName: add-a-box-shadow-to-a-card-like-element
 
 # --description--
 
-The `box-shadow` property applies one or more shadows to an element.
+`box-shadow` 속성은 엘리먼트에 하나 이상의 그림자 효과를 적용합니다.
 
-The `box-shadow` property takes the following values, in order:
+`box-shadow` 속성은 순서대로 아래의 값을 취합니다:
 
 <ul>
-  <li><code>offset-x</code> (how far to push the shadow horizontally from the element)</li>
-  <li><code>offset-y</code> (how far to push the shadow vertically from the element)</li>
+  <li><code>offset-x</code> (엘리먼트의 가로 방향으로 얼마나 그림자를 적용할지)</li>
+  <li><code>offset-y</code> (엘리먼트의 세로 방향으로 얼마나 그림자를 적용할지)</li>
   <li><code>blur-radius</code></li>
   <li><code>spread-radius</code></li>
   <li><code>color</code></li>
 </ul>
 
-The `blur-radius` and `spread-radius` values are optional.
+`blur-radius`와 `spread-radius` 값은 선택 항목입니다.
 
-Multiple box-shadows can be created by using commas to separate properties of each `box-shadow` element.
+콤마를 이용하면 각각의 `box-shadow` 엘리먼트 속성들을 구분할 수 있어 여러 box-shadow를 생성할 수 있습니다.
 
-Here's an example of the CSS to create multiple shadows with some blur, at mostly-transparent black colors:
+아래는 거의 투명에 가까운 검정색을 써서 약간의 흐림 효과를 더해 여러 그림자를 만들어보는 CSS 예제입니다.
 
 ```css
 box-shadow: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
@@ -33,17 +33,17 @@ box-shadow: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
 
 # --instructions--
 
-The element now has an id of `thumbnail`. With this selector, use the example CSS values above to place a `box-shadow` on the card.
+엘리먼트는 `thumbnail`이라는 id 값을 갖습니다. 이 선택자를 이용해, 위 예시의 CSS 값을 이용해 카드 엘리먼트 위에 `box-shadow`를 적용해보세요.
 
 # --hints--
 
-Your code should add a `box-shadow` property for the `thumbnail` id.
+여러분의 코드는 `thumbnail`이라는 id에 `box-shadow` 속성을 추가해야 합니다.
 
 ```js
 assert(code.match(/#thumbnail\s*?{\s*?box-shadow/g));
 ```
 
-You should use the given CSS for the `box-shadow` value.
+주어진 CSS를 이용해 `box-shadow` 값을 사용해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-background-color-property-of-text.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-background-color-property-of-text.md
index 5be456e6e6c..c01d9e25674 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-background-color-property-of-text.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-background-color-property-of-text.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781b367417b2b2512abc
-title: Adjust the background-color Property of Text
+title: 텍스트의 background-color 속성 조정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cEDqwA6'
 forumTopicId: 301032
@@ -9,23 +9,23 @@ dashedName: adjust-the-background-color-property-of-text
 
 # --description--
 
-Instead of adjusting your overall background or the color of the text to make the foreground easily readable, you can add a `background-color` to the element holding the text you want to emphasize. This challenge uses `rgba()` instead of `hex` codes or normal `rgb()`.
+전체 배경을 조정하거나 전경의 가독성을 위해 텍스트 색상을 바꾸는 대신, 강조하고자 하는 텍스트를 가진 요소 자체에 `background-color`를 입힐 수 있습니다. 이번 도전 과제는 `hex` 코드나 보통의 `rgb()`를 사용하는 대신 `rgba()`를 사용합니다.
 
-<blockquote>rgba stands for:<br>  r = red<br>  g = green<br>  b = blue<br>  a = alpha/level of opacity</blockquote>
+<blockquote>rgba는 아래의 약어입니다:<br>  r = red<br>  g = green<br>  b = blue<br>  a = alpha 값/불투명도 수준</blockquote>
 
-The RGB values can range from 0 to 255. The alpha value can range from 1, which is fully opaque or a solid color, to 0, which is fully transparent or clear. `rgba()` is great to use in this case, as it allows you to adjust the opacity. This means you don't have to completely block out the background.
+RGB는 0에서 255 사이의 값을 가집니다. alpha는 완전히 불투명한 값, 혹은 단색인 1부터 완전히 투명한 값인 0까지의 범위에서 값을 가질 수 있습니다. 불투명도를 조절할 수 있으므로 `rgba()`는 이런 경우 매우 유용합니다. 즉, 배경을 완전히 가리지 않아도 된다는 의미입니다.
 
-You'll use `background-color: rgba(45, 45, 45, 0.1)` for this challenge. It produces a dark gray color that is nearly transparent given the low opacity value of 0.1.
+이번 도전 과제에서는 `background-color: rgba(45, 45, 45, 0.1)`를 사용해 볼 것입니다. 불투명도를 0.1로 낮게 설정하므로 거의 투명에 가까운 어두운 회색이 적용됩니다.
 
 # --instructions--
 
-To make the text stand out more, adjust the `background-color` of the `h4` element to the given `rgba()` value.
+글자를 더욱 눈에 띄게 하려면, `h4` 요소의 `background-color`를 주어진 `rgba()` 값으로 변경할 수 있습니다.
 
-Also for the `h4`, remove the `height` property and add `padding` of 10px.
+또한, `h4`에는 `height` 속성을 삭제하고 `padding` 10px를 추가해봅니다.
 
 # --hints--
 
-Your code should add a `background-color` property to the `h4` element set to `rgba(45, 45, 45, 0.1)`.
+여러분의 코드에는 `h4` 요소의 `background-color` 속성이 `rgba(45, 45, 45, 0.1)`로 설정되어 있어야 합니다.
 
 ```js
 assert(
@@ -35,7 +35,7 @@ assert(
 );
 ```
 
-Your code should add a `padding` property to the `h4` element and set it to 10 pixels.
+여러분의 코드에서 `h4` 요소의 `padding` 속성은 10 픽셀로 적용되어야 합니다.
 
 ```js
 assert(
@@ -46,7 +46,7 @@ assert(
 );
 ```
 
-The `height` property on the `h4` element should be removed.
+`h4` 요소의 `height` 속성은 지우셔야 합니다.
 
 ```js
 assert(!($('h4').css('height') == '25px'));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-color-of-various-elements-to-complementary-colors.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-color-of-various-elements-to-complementary-colors.md
index 430655f120c..1cdc00e1d70 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-color-of-various-elements-to-complementary-colors.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-color-of-various-elements-to-complementary-colors.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a4367417b2b2512ad3
-title: Adjust the Color of Various Elements to Complementary Colors
+title: 다양한 요소의 색상을 보충 색으로 조정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cWmPpud'
 forumTopicId: 301033
@@ -9,33 +9,33 @@ dashedName: adjust-the-color-of-various-elements-to-complementary-colors
 
 # --description--
 
-The Complementary Colors challenge showed that opposite colors on the color wheel can make each other appear more vibrant when placed side-by-side. However, the strong visual contrast can be jarring if it's overused on a website, and can sometimes make text harder to read if it's placed on a complementary-colored background. In practice, one of the colors is usually dominant and the complement is used to bring visual attention to certain content on the page.
+보충 색 도전 과제를 통해 색상환에서 서로 반대에 위치한 색상이 서로 옆에 있을 때 더 눈에 띌 수 있다는 것을 알 수 있었습니다. 그러나 강한 시각적 대조가 웹사이트에서 과도하게 사용되면 눈에 거슬릴 수 있으며, 보충색 배경 위에 텍스트를 두면 읽기 어려워질 수도 있습니다. 실제로는 일반적으로 한 색상이 우세하고 보충색은 페이지의 특정 콘텐츠에 시각적 관심을 끌기 위해 사용됩니다.
 
 # --instructions--
 
-This page will use a shade of teal (`#09A7A1`) as the dominant color, and its orange (`#FF790E`) complement to visually highlight the sign-up buttons. Change the `background-color` of both the `header` and `footer` from black to the teal color. Then change the `h2` text `color` to teal as well. Finally, change the `background-color` of the `button` to the orange color.
+이 페이지에서는 주로 틸 색상 (`#09A7A1`)을 사용하고 시각적으로 강조할 로그인 버튼에 오렌지 색상 (`#FF790E`) 보충색상으로 사용할 것입니다. `header`와 `footer`의 `background-color`를 검은색에서 틸 색상으로 변경하세요. 그런 다음 `h2` 텍스트의 `color`를 틸 색상으로 변경하세요. 마지막으로, `button`의 `background-color`를 주황색으로 변경하세요.
 
 # --hints--
 
-The `header` element should have a `background-color` of #09A7A1.
+`header` 요소의 `background-color`를 #09A7A1로 설정해야 합니다.
 
 ```js
 assert($('header').css('background-color') == 'rgb(9, 167, 161)');
 ```
 
-The `footer` element should have a `background-color` of #09A7A1.
+`footer` 요소의 `background-color`를 #09A7A1로 설정해야 합니다.
 
 ```js
 assert($('footer').css('background-color') == 'rgb(9, 167, 161)');
 ```
 
-The `h2` element should have a `color` of #09A7A1.
+`h2` 요소의 `color`를 #09A7A1로 설정해야 합니다.
 
 ```js
 assert($('h2').css('color') == 'rgb(9, 167, 161)');
 ```
 
-The `button` element should have a `background-color` of #FF790E.
+`button` 요소의 `background-color`를 #FF790E로 설정해야 합니다.
 
 ```js
 assert($('button').css('background-color') == 'rgb(255, 121, 14)');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-height-of-an-element-using-the-height-property.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-height-of-an-element-using-the-height-property.md
index f89a363afb4..a0ed22be52f 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-height-of-an-element-using-the-height-property.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-height-of-an-element-using-the-height-property.md
@@ -1,6 +1,6 @@
 ---
 id: 587d7791367417b2b2512ab5
-title: Adjust the Height of an Element Using the height Property
+title: height 속성을 이용해서 요소의 높이 조정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cEDaDTN'
 forumTopicId: 301034
@@ -9,7 +9,7 @@ dashedName: adjust-the-height-of-an-element-using-the-height-property
 
 # --description--
 
-You can specify the height of an element using the `height` property in CSS, similar to the `width` property. Here's an example that changes the height of an image to 20px:
+요소의 높이는 CSS에서 `height` 속성을 사용하여 지정할 수 있습니다. 이것은 `width` 속성과 유사합니다. 다음은 이미지의 높이를 20픽셀로 변경하는 예제입니다.
 
 ```css
 img {
@@ -19,13 +19,13 @@ img {
 
 # --instructions--
 
-Add a `height` property to the `h4` tag and set it to 25px.
+`h4` 태그에 `height` 속성을 추가하고 값을 25px로 설정하세요.
 
-**Note:** You may need to be at 100% zoom to pass the test on this challenge.
+**참고:** 이 도전 과제를 통과하려면 화면을 100% 줌 상태로 설정해야 할 수도 있습니다.
 
 # --hints--
 
-Your code should change the `h4` `height` property to a value of 25 pixels.
+`h4`의 `height` 속성을 25 픽셀로 변경해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-hover-state-of-an-anchor-tag.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-hover-state-of-an-anchor-tag.md
index 308491804b4..8c15e5a9b6c 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-hover-state-of-an-anchor-tag.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-hover-state-of-an-anchor-tag.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781d367417b2b2512ac8
-title: Adjust the Hover State of an Anchor Tag
+title: 앵커 태그의 hover 상태 조정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cakRGcm'
 forumTopicId: 301035
@@ -9,9 +9,9 @@ dashedName: adjust-the-hover-state-of-an-anchor-tag
 
 # --description--
 
-This challenge will touch on the usage of pseudo-classes. A pseudo-class is a keyword that can be added to selectors, in order to select a specific state of the element.
+이 도전 과제에서는 가상 클래스의 사용에 대해 다룹니다. 가상 클래스는 요소의 특정 상태를 선택하기 위해 선택기에 추가할 수 있는 키워드입니다.
 
-For example, the styling of an anchor tag can be changed for its hover state using the `:hover` pseudo-class selector. Here's the CSS to change the `color` of the anchor tag to red during its hover state:
+예를 들어, 앵커 태그의 스타일은 `:hover` 가상 클래스 선택기를 사용하여 hover 상태에 대해 변경될 수 있습니다. 다음은 hover 상태일때 앵커 태그의 `color`를 빨간색으로 변경하는 CSS입니다.
 
 ```css
 a:hover {
@@ -21,17 +21,17 @@ a:hover {
 
 # --instructions--
 
-The code editor has a CSS rule to style all `a` tags black. Add a rule so that when the user hovers over the `a` tag, the `color` is blue.
+코드 에디터에는 모든 `a` 태그를 검은색으로 스타일링하는 CSS 규칙이 있습니다. 사용자가 `a` 태그 위로 마우스를 올릴 때 `color`가 파란색으로 변경되도록 규칙을 추가하세요.
 
 # --hints--
 
-The anchor tag `color` should remain black, only add CSS rules for the `:hover` state.
+앵커 태그의 `color`는 검은색으로 유지되어야 하며, `:hover` 상태에 대한 CSS 규칙만 추가하세요.
 
 ```js
 assert($('a').css('color') == 'rgb(0, 0, 0)');
 ```
 
-The anchor tag should have a `color` of blue on hover.
+앵커 태그는 hover 상태일 때 `color`가 파란색이어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-hue-of-a-color.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-hue-of-a-color.md
index a01219acc3b..7cfde6ead5c 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-hue-of-a-color.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-hue-of-a-color.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a4367417b2b2512ad4
-title: Adjust the Hue of a Color
+title: 색상의 색조(hue) 조절하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cPp38TZ'
 forumTopicId: 301036
@@ -9,55 +9,55 @@ dashedName: adjust-the-hue-of-a-color
 
 # --description--
 
-Colors have several characteristics including hue, saturation, and lightness. CSS3 introduced the `hsl()` function as an alternative way to pick a color by directly stating these characteristics.
+색상은 색조, 채도 및 명도와 같은 여러 특성을 가지고 있습니다. CSS3에서는 이러한 특성들을 직접 명시하여 색상을 선택하는 대체 방법으로 `hsl()` 함수를 소개했습니다.
 
-**Hue** is what people generally think of as 'color'. If you picture a spectrum of colors starting with red on the left, moving through green in the middle, and blue on right, the hue is where a color fits along this line. In `hsl()`, hue uses a color wheel concept instead of the spectrum, where the angle of the color on the circle is given as a value between 0 and 360.
+**색조(Hue)**란 일반적으로 우리가 생각하는 '색상' 입니다. 만약 왼쪽에서 시작하는 빨강을 포함하고 중간을 통과하는 녹색 그리고 오른쪽에 있는 파랑까지의 색깔 스펙트럼을 상상해보면, 색조(hue)는 이 선 상에서 어떤 위치에 색이 위치하는지를 나타냅니다. `hsl()`에서 색조는 스펙트럼이 아니라 색상환의 개념을 사용하며, 원의 색상값이 0에서 360까지의 값으로 표현됩니다.
 
-**Saturation** is the amount of gray in a color. A fully saturated color has no gray in it, and a minimally saturated color is almost completely gray. This is given as a percentage with 100% being fully saturated.
+**채도**는 색상에 포함된 회색의 양을 나타냅니다. 완전히 채도가 높은 색상은 회색이 섞이지 않았으며, 채도가 매우 낮은 색상은 거의 완전히 회색입니다. 이 값은 100%일때 채도가 가장 높은 상태를 나타냅니다.
 
-**Lightness** is the amount of white or black in a color. A percentage is given ranging from 0% (black) to 100% (white), where 50% is the normal color.
+**명도**는 색상에 포함된 흰색 또는 검은색의 양을 나타냅니다. 0% (검은색)에서 100% (흰색)까지의 범위로 주어지며, 50%가 일반적인 색상입니다.
 
-Here are a few examples of using `hsl()` with fully-saturated, normal lightness colors:
+`hsl()`을 사용하여 완전히 채도가 높고 정상 밝기 색상을 사용하는 몇 가지 예제가 있습니다.
 
-<table><thead><tr><th>Color</th><th>HSL</th></tr></thead><tbody><tr><td>red</td><td>hsl(0, 100%, 50%)</td></tr><tr><td>yellow</td><td>hsl(60, 100%, 50%)</td></tr><tr><td>green</td><td>hsl(120, 100%, 50%)</td></tr><tr><td>cyan</td><td>hsl(180, 100%, 50%)</td></tr><tr><td>blue</td><td>hsl(240, 100%, 50%)</td></tr><tr><td>magenta</td><td>hsl(300, 100%, 50%)</td></tr></tbody></table>
+<table><thead><tr><th>색상</th><th>HSL(색조, 채도, 명도)</th></tr></thead><tbody><tr><td>빨강</td><td>hsl(0, 100%, 50%)</td></tr><tr><td>노랑</td><td>hsl(60, 100%, 50%)</td></tr><tr><td>초록</td><td>hsl(120, 100%, 50%)</td></tr><tr><td>청록색(cyan)</td><td>hsl(180, 100%, 50%)</td></tr><tr><td>파랑</td><td>hsl(240, 100%, 50%)</td></tr><tr><td>자홍색(magenta)</td><td>hsl(300, 100%, 50%)</td></tr></tbody></table>
 
 # --instructions--
 
-Change the `background-color` of each `div` element based on the class names (`green`, `cyan`, or `blue`) using `hsl()`. All three should have full saturation and normal lightness.
+각 `div` 요소의 `background-color`를 클래스 이름(`green`, `cyan`, 또는 `blue`)에 따라 `hsl()`을 사용하여 변경하세요. 세 가지 색상 모두 완전한 채도이며 정상적인 밝기여야 합니다.
 
 # --hints--
 
-Your code should use the `hsl()` function to declare the color green.
+초록색을 사용하기 위해 `hsl()` 함수를 사용해야 합니다.
 
 ```js
 assert(code.match(/\.green\s*?{\s*?background-color\s*:\s*?hsl/gi));
 ```
 
-Your code should use the `hsl()` function to declare the color cyan.
+옥색(cyan)을 사용하기 위해 `hsl()` 함수를 사용해야 합니다.
 
 ```js
 assert(code.match(/\.cyan\s*?{\s*?background-color\s*:\s*?hsl/gi));
 ```
 
-Your code should use the `hsl()` function to declare the color blue.
+파란색을 사용하기 위해 `hsl()` 함수를 사용해야 합니다.
 
 ```js
 assert(code.match(/\.blue\s*?{\s*?background-color\s*:\s*?hsl/gi));
 ```
 
-The `div` element with class `green` should have a `background-color` of green.
+`green` 클래스의 `div` 요소는 `background-color`가 초록색이어야 합니다.
 
 ```js
 assert($('.green').css('background-color') == 'rgb(0, 255, 0)');
 ```
 
-The `div` element with class `cyan` should have a `background-color` of cyan.
+클래스 이름이 `cyan`인 `div` 요소는 청록색의 `background-color`를 가져야 합니다.
 
 ```js
 assert($('.cyan').css('background-color') == 'rgb(0, 255, 255)');
 ```
 
-The `div` element with class `blue` should have a `background-color` of blue.
+`blue` 클래스의 `div` 요소는 `background-color`가 파란색이어야 합니다.
 
 ```js
 assert($('.blue').css('background-color') == 'rgb(0, 0, 255)');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-size-of-a-heading-element-versus-a-paragraph-element.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-size-of-a-heading-element-versus-a-paragraph-element.md
index 58a206ad427..791a89584cd 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-size-of-a-heading-element-versus-a-paragraph-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-size-of-a-heading-element-versus-a-paragraph-element.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781b367417b2b2512abd
-title: Adjust the Size of a Heading Element Versus a Paragraph Element
+title: 제목 요소와 문단 요소의 크기 조정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c3bRPTz'
 forumTopicId: 301037
@@ -9,15 +9,15 @@ dashedName: adjust-the-size-of-a-heading-element-versus-a-paragraph-element
 
 # --description--
 
-The font size of heading elements (`h1` through `h6`) should generally be larger than the font size of paragraph tags. This makes it easier for the user to visually understand the layout and level of importance of everything on the page. You use the `font-size` property to adjust the size of the text in an element.
+제목 요소(`h1`부터 `h6`)의 글꼴 크기는 일반적으로 문단 태그의 글꼴 크기보다 커야 합니다. 이렇게 하면 사용자가 페이지의 레이아웃과 중요도를 시각적으로 더 쉽게 이해할 수 있습니다. 텍스트의 크기를 조절하려면 `font-size` 속성을 사용합니다.
 
 # --instructions--
 
-To make the heading significantly larger than the paragraph, change the `font-size` of the `h4` element to 27 pixels.
+제목을 문단보다 크게 만들려면 `h4` 요소의 `font-size`를 27픽셀로 변경하세요.
 
 # --hints--
 
-Your code should add a `font-size` property to the `h4` element set to 27 pixels.
+`h4` 요소의 `font-size` 속성은 27 픽셀로 적용되어야 합니다.
 
 ```js
 assert($('h4').css('font-size') == '27px');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-tone-of-a-color.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-tone-of-a-color.md
index fdd9a21bfc4..5d0ffcb5c44 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-tone-of-a-color.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-tone-of-a-color.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a4367417b2b2512ad5
-title: Adjust the Tone of a Color
+title: 색상의 톤(tone) 조절하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cEDJvT7'
 forumTopicId: 301038
@@ -9,15 +9,15 @@ dashedName: adjust-the-tone-of-a-color
 
 # --description--
 
-The `hsl()` option in CSS also makes it easy to adjust the tone of a color. Mixing white with a pure hue creates a tint of that color, and adding black will make a shade. Alternatively, a tone is produced by adding gray or by both tinting and shading. Recall that the 's' and 'l' of `hsl()` stand for saturation and lightness, respectively. The saturation percent changes the amount of gray and the lightness percent determines how much white or black is in the color. This is useful when you have a base hue you like, but need different variations of it.
+CSS에서 `hsl()` 옵션을 이용하면 색상의 톤을 조절하기 쉬워집니다. 순색(hue)에 흰색을 섞으면 그 색상의 틴트(tint)가, 검은색을 섞으면 쉐이드(shade)가 만들어집니다. 한편, 색상의 톤(tone)은 그 색상에 회색을 섞거나 틴트, 쉐이드를 사용하여 만들어집니다. `hsl()`에서 's'와 'l'은 각각 채도(saturation)와 밝기(lightness)를 뜻합니다. 채도의 퍼센티지는 회색의 양을 변화시키며 밝기 퍼센티지는 색상에 포함된 흰색이나 검은색의 양을 결정합니다. 이는 기본 순색(hue)은 마음에 들지만 다양한 변형이 필요할 때 유용합니다.
 
 # --instructions--
 
-All elements have a default `background-color` of `transparent`. Our `nav` element currently appears to have a `cyan` background, because the element behind it has a `background-color` set to `cyan`. Add a `background-color` to the `nav` element so it uses the same `cyan` hue, but has `80%` saturation and `25%` lightness values to change its tone and shade.
+모든 엘리먼트의 `background-color` 기본값은 `transparent`입니다. `nav` 요소의 배경 색은 현재 `cyan`으로 나옵니다. 요소의 `background-color`가 `cyan`으로 설정되어 있기 때문입니다. `nav` 요소에 `background-color`를 추가하여 동일한 `cyan` 순색을 쓰되, 채도는 `80%`, 밝기는 `25%`로 조절하여 톤과 쉐이드를 바꿔 보세요.
 
 # --hints--
 
-The `nav` element should have a `background-color` of the adjusted cyan tone using the `hsl()` property.
+`nav` 요소의 `background-color`는 `hsl()` 속성을 사용하여 보정한 청록색(cyan) 톤이 되어야 합니다.
 
 ```js
 // Computed style of hsl(180, 80%, 25%) results in rgb(13,115,115)
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-width-of-an-element-using-the-width-property.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-width-of-an-element-using-the-width-property.md
index 7ed75a1ea50..6447ccf8c96 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-width-of-an-element-using-the-width-property.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/adjust-the-width-of-an-element-using-the-width-property.md
@@ -1,6 +1,6 @@
 ---
 id: 587d7791367417b2b2512ab4
-title: Adjust the Width of an Element Using the width Property
+title: Width 속성을 이용해서 요소의 너비 조정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cvVLPtN'
 forumTopicId: 301039
@@ -9,7 +9,7 @@ dashedName: adjust-the-width-of-an-element-using-the-width-property
 
 # --description--
 
-You can specify the width of an element using the `width` property in CSS. Values can be given in relative length units (such as `em`), absolute length units (such as `px`), or as a percentage of its containing parent element. Here's an example that changes the width of an image to 220px:
+요소의 너비를 지정하려면 CSS에서 `width` 속성을 사용할 수 있습니다. 너비 값은 상대 길이 단위(예: `em`), 절대 길이 단위(예: `px`), 또는 포함하하고 있는부모 요소의 백분율로 지정할 수 있습니다. 이미지의 너비를 220px로 변경하는 예제입니다.
 
 ```css
 img {
@@ -19,11 +19,11 @@ img {
 
 # --instructions--
 
-Add a `width` property to the entire card and set it to an absolute value of 245px. Use the `fullCard` class to select the element.
+전체 카드에 `width` 속성을 추가하고 절대값인 245px로 설정하십시오. `fullCard` 클래스를 사용하여 요소를 선택하세요.
 
 # --hints--
 
-Your code should change the `width` property of the card to 245 pixels by using the `fullCard` class selector.
+`fullCard` 클래스 선택자를 사용하여 카드의 `width` 속성을 245 픽셀로 변경해야 합니다.
 
 ```js
 const fullCard = code.match(/\.fullCard\s*{[\s\S]+?[^}]}/g);
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/animate-elements-at-variable-rates.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/animate-elements-at-variable-rates.md
index da2020f4d5b..04ac9742008 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/animate-elements-at-variable-rates.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/animate-elements-at-variable-rates.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a8367417b2b2512ae5
-title: Animate Elements at Variable Rates
+title: 변수 속도로 요소에 애니메이션을 적용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cZ89WA4'
 forumTopicId: 301040
@@ -9,17 +9,17 @@ dashedName: animate-elements-at-variable-rates
 
 # --description--
 
-There are a variety of ways to alter the animation rates of similarly animated elements. So far, this has been achieved by applying an `animation-iteration-count` property and setting `@keyframes` rules.
+비슷하게 애니메이션이 적용된 요소들의 애니메이션 속도를 변경하는 다양한 방법이 있습니다. 지금까지는 `animation-iteration-count` 속성을 적용하고 `@keyframes` 규칙을 설정하여 할 수 있었습니다.
 
-To illustrate, the animation on the right consists of two stars that each decrease in size and opacity at the 20% mark in the `@keyframes` rule, which creates the twinkle animation. You can change the `@keyframes` rule for one of the elements so the stars twinkle at different rates.
+예를 들어, 오른쪽의 애니메이션은 `@keyframes` 규칙의 20% 지점에서 크기와 불투명도가 줄어드는 두 개의 별로 구성되어 있어 반짝이는 애니메이션을 만듭니다. 한 요소의 `@keyframes` 규칙을 변경하여 별이 서로 다른 속도로 반짝이도록 할 수 있습니다.
 
 # --instructions--
 
-Alter the animation rate for the element with the class name of `star-1` by changing its `@keyframes` rule to 50%.
+클래스 이름이 `star-1`인 요소의 애니메이션 속도를 변경하기위해 해당 요소의 `@keyframes` 규칙을 50%로 변경하세요.
 
 # --hints--
 
-The `@keyframes` rule for the `star-1` class should be 50%.
+`star-1` 클래스의 `@keyframes` 규칙을 50%로 변경해야 합니다.
 
 ```js
 assert(code.match(/twinkle-1\s*?{\s*?50%/g));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/animate-elements-continually-using-an-infinite-animation-count.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/animate-elements-continually-using-an-infinite-animation-count.md
index f3280fddbc7..14064870a07 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/animate-elements-continually-using-an-infinite-animation-count.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/animate-elements-continually-using-an-infinite-animation-count.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a8367417b2b2512ae3
-title: Animate Elements Continually Using an Infinite Animation Count
+title: 무한한 애니메이션 횟수를 사용하여 요소를 계속해서 애니메이션화 하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cVJDVfq'
 forumTopicId: 301041
@@ -9,21 +9,21 @@ dashedName: animate-elements-continually-using-an-infinite-animation-count
 
 # --description--
 
-The previous challenges covered how to use some of the animation properties and the `@keyframes` rule. Another animation property is the `animation-iteration-count`, which allows you to control how many times you would like to loop through the animation. Here's an example:
+이전 도전 과제에서는 일부 애니메이션 속성과 `@keyframes` 규칙 사용 방법을 다뤘습니다. 또 다른 애니메이션 속성은 `animation-iteration-count`인데, 이를 사용하여 애니메이션을 몇 번 반복할지를 제어할 수 있습니다. 여기 예시가 있습니다.
 
 ```css
 animation-iteration-count: 3;
 ```
 
-In this case the animation will stop after running 3 times, but it's possible to make the animation run continuously by setting that value to `infinite`.
+이 경우에는 애니메이션은 3번 실행된 후 멈출 것이지만, 그 값을 `infinite`로 설정하여 애니메이션을 계속해서 실행할 수 있습니다.
 
 # --instructions--
 
-To keep the ball bouncing on the right on a continuous loop, change the `animation-iteration-count` property to `infinite`.
+오른쪽에 있는 공이 계속해서 반복되게 튀기려면 `animation-iteration-count` 속성을 `infinite`로 변경하십시오.
 
 # --hints--
 
-The `animation-iteration-count` property should have a value of `infinite`.
+`animation-iteration-count` 속성의 값은 `infinite`여야 합니다.
 
 ```js
 assert($('#ball').css('animation-iteration-count') == 'infinite');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/animate-multiple-elements-at-variable-rates.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/animate-multiple-elements-at-variable-rates.md
index 7baaef275c3..28a24edf040 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/animate-multiple-elements-at-variable-rates.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/animate-multiple-elements-at-variable-rates.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a8367417b2b2512ae6
-title: Animate Multiple Elements at Variable Rates
+title: 변수 속도로 여러 요소들에 애니메이션을 적용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cnpWZc9'
 forumTopicId: 301042
@@ -9,29 +9,29 @@ dashedName: animate-multiple-elements-at-variable-rates
 
 # --description--
 
-In the previous challenge, you changed the animation rates for two similarly animated elements by altering their `@keyframes` rules. You can achieve the same goal by manipulating the `animation-duration` of multiple elements.
+이전 챌린지에서 `@keyframes` 규칙들을 수정하여 유사하게 애니메이션화된 두 요소들의 에니메이션 속도를 변경했습니다. 여러 요소들의 `animation-duration`을 조작하여 동일한 목표를 달성할 수 있습니다.
 
-In the animation running in the code editor, there are three stars in the sky that twinkle at the same rate on a continuous loop. To make them twinkle at different rates, you can set the `animation-duration` property to different values for each element.
+코드 편집기에서 실행 중인 애니메이션에서는 하늘에 세 개의 별들이 계속해서 동일한 속도로 반짝입니다. `animation-duration` 속성을 각각의 요소마다 다른 값을 지정해주면 다른 속도로 반짝이게 만들 수 있습니다.
 
 # --instructions--
 
-Set the `animation-duration` of the elements with the classes `star-1`, `star-2`, and `star-3` to 1s, 0.9s, and 1.1s, respectively.
+클래스가 `star-1`, `star-2`, `star-3`인 요소들의 `animation-duration`을 각각 1초, 0.9초, 1.1초로 설정합니다.
 
 # --hints--
 
-The `animation-duration` property for the star with class `star-1` should remain at 1s.
+클래스가 `star-1`인 별의 `animation-duration` 속성은 1초로 유지되어야 합니다.
 
 ```js
 assert($('.star-1').css('animation-duration') == '1s');
 ```
 
-The `animation-duration` property for the star with class `star-2` should be 0.9s.
+클래스가 `star-2`인 별의 `animation-duration` 속성은 0.9초여야 합니다.
 
 ```js
 assert($('.star-2').css('animation-duration') == '0.9s');
 ```
 
-The `animation-duration` property for the star with class `star-3` should be 1.1s.
+클래스가 `star-3`인 별의 `animation-duration` 속성은 1.1초여야 합니다.
 
 ```js
 assert($('.star-3').css('animation-duration') == '1.1s');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/center-an-element-horizontally-using-the-margin-property.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/center-an-element-horizontally-using-the-margin-property.md
index c4ec2289621..53b7bf4ed25 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/center-an-element-horizontally-using-the-margin-property.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/center-an-element-horizontally-using-the-margin-property.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a3367417b2b2512ad0
-title: Center an Element Horizontally Using the margin Property
+title: margin 속성을 활용하여 요소를 수평으로 가운데 맞추기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cyLJqU4'
 forumTopicId: 301043
@@ -9,17 +9,17 @@ dashedName: center-an-element-horizontally-using-the-margin-property
 
 # --description--
 
-Another positioning technique is to center a block element horizontally. One way to do this is to set its `margin` to a value of auto.
+또 다른 위치 지정 기술은 블록 요소를 수평으로 가운데 정렬하는 것입니다. 한 가지 방법은 `margin` 값을 자동으로 설정하는 것입니다.
 
-This method works for images, too. Images are inline elements by default, but can be changed to block elements when you set the `display` property to `block`.
+이 방법은 사진들에도 사용할 수 있습니다. 사진들은 기본적으로 인라인 요소들이지만 `display` 속성을 `block`로 설정하면 블록 요소로 바꿀 수 있습니다.
 
 # --instructions--
 
-Center the `div` on the page by adding a `margin` property with a value of `auto`.
+`margin` 속성에 `auto` 값을 추가하여 페이지 가운데에 `div`을 정렬합니다.
 
 # --hints--
 
-The `div` should have a `margin` set to `auto`.
+`div`는 `margin`이 `auto`로 설정되어야 합니다.
 
 ```js
 assert(new __helpers.CSSHelp(document).getStyle('div')?.margin === 'auto');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/change-an-elements-relative-position.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/change-an-elements-relative-position.md
index 91d8545abd4..7d56f9713a3 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/change-an-elements-relative-position.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/change-an-elements-relative-position.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781e367417b2b2512ac9
-title: Change an Element's Relative Position
+title: 요소의 상대적인 위치를 변경하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/czVmMtZ'
 forumTopicId: 301044
@@ -9,9 +9,9 @@ dashedName: change-an-elements-relative-position
 
 # --description--
 
-CSS treats each HTML element as its own box, which is usually referred to as the <dfn>CSS Box Model</dfn>. Block-level items automatically start on a new line (think headings, paragraphs, and divs) while inline items sit within surrounding content (like images or spans). The default layout of elements in this way is called the <dfn>normal flow</dfn> of a document, but CSS offers the position property to override it.
+CSS는 각 HTML 요소를 별도의 상자로 취급하며 이를 일반적으로 <dfn>CSS 박스 모델</dfn>이라고 합니다. 블록 수준 항목은 자동으로 새로운 줄에서 시작합니다 (제목, 단락, div 같은 것을 생각해보세요) 반면 인라인 항목은 주변 콘텐츠 안에 위치합니다 (이미지나 span 같은 것들처럼 말이죠). 이렇게 요소의 기본 레이아웃은 문서의 <dfn>정상 흐름(normal flow)</dfn>이라고 불립니다. 그러나 CSS에서는 이를 무시하고 변경하도록 position 속성을 제공합니다.
 
-When the position of an element is set to `relative`, it allows you to specify how CSS should move it *relative* to its current position in the normal flow of the page. It pairs with the CSS offset properties of `left` or `right`, and `top` or `bottom`. These say how many pixels, percentages, or ems to move the item *away* from where it is normally positioned. The following example moves the paragraph 10 pixels away from the bottom:
+요소의 위치가 `relative`로 설정되면 현재 페이지에서 그 요소가 정상 흐름일 때의 위치를 기준으로 해서 거기에 *상대적으로* 어떻게 CSS를 이용해 이동할지를 지정할 수 있습니다. 이는 CSS의 `left` 또는 `right`, 그리고 `top` 또는 `bottom` 오프셋 속성과 함께 사용됩니다. 이는 항목을 일반적으로 *위치한 곳으로부터* 얼마의 픽셀, 퍼센트 또는 em만큼을 이동할지를 나타냅니다. 다음 예제는 문단을 밑으로부터 10픽셀만큼 이동시킵니다.
 
 ```css
 p {
@@ -20,23 +20,23 @@ p {
 }
 ```
 
-Changing an element's position to relative does not remove it from the normal flow - other elements around it still behave as if that item were in its default position.
+요소의 위치를 상대적으로 변경하면 해당 요소가 일반적인 흐름에서 제거되지 않습니다. 주변의 다른 요소들은 여전히 해당 항목이 기본 위치에 있는 것처럼 동작합니다.
 
-**Note:** Positioning gives you a lot of flexibility and power over the visual layout of a page. It's good to remember that no matter the position of elements, the underlying HTML markup should be organized and make sense when read from top to bottom. This is how users with visual impairments (who rely on assistive devices like screen readers) access your content.
+**참고:** 위치 지정은 페이지의 시각적 레이아웃에 대한 많은 유연성과 권한을 제공합니다. 요소의 위치가 어디 있든지 간에 기억해야 할 중요한 점은 HTML 마크업이 위에서 아래로 읽을 때 말이 되도록 구성되어야 한다는 것입니다. 이것이 시각 장애를 가진 사용자(화면 낭독기와 같은 보조 기기에 의존하는 사용자)가 콘텐츠를 접하는 방법입니다.
 
 # --instructions--
 
-Change the `position` of the `h2` to `relative`, and use a CSS offset to move it 15 pixels away from the `top` of where it sits in the normal flow. Notice there is no impact on the positions of the surrounding h1 and p elements.
+`h2`의 `position` 속성을 `relative`로 변경하고 CSS 오프셋을 사용하여 해당 요소를 일반적인 흐름일 때의 위치, 즉 `top`에서 15픽셀만큼 이동합니다. 그 주위에 있는 h1과 p요소들에는 영향이 없다는 것을 알 수 있습니다.
 
 # --hints--
 
-The `h2` element should have a `position` property set to `relative`.
+`h2`요소의 `position` 속성을 `relative`로 설정해야 합니다.
 
 ```js
 assert($('h2').css('position') == 'relative');
 ```
 
-Your code should use a CSS offset to relatively position the `h2` 15px away from the `top` of where it normally sits.
+CSS 오프셋을 이용해서 `h2`를 일반적 위치 `top`에서 15px 만큼 이동하도록 해야 합니다.
 
 ```js
 assert($('h2').css('top') == '15px');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/change-animation-timing-with-keywords.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/change-animation-timing-with-keywords.md
index f4bc236532d..de2ef43ceb7 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/change-animation-timing-with-keywords.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/change-animation-timing-with-keywords.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a8367417b2b2512ae7
-title: Change Animation Timing with Keywords
+title: 키워드를 사용해 애니메이션 실행 속도 변경하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cJKvwCM'
 forumTopicId: 301045
@@ -9,17 +9,17 @@ dashedName: change-animation-timing-with-keywords
 
 # --description--
 
-In CSS animations, the `animation-timing-function` property controls how quickly an animated element changes over the duration of the animation. If the animation is a car moving from point A to point B in a given time (your `animation-duration`), the `animation-timing-function` says how the car accelerates and decelerates over the course of the drive.
+CSS 애니메이션에서, `animation-timing-function` 속성은 애니메이션 실행 시간 내에서 애니메이션이 실행되는 속도를 조절합니다. 예를 들어, A지점에서 B지점으로 지정된 시간(`animation-duration`) 동안 자동차가 이동하는 애니메이션이 있다고 합시다. 이때 `animation-timing-function` 속성은 차가 이동하는 동안 어떤 식으로 가속하거나 감속하는지를 결정합니다.
 
-There are a number of predefined keywords available for popular options. For example, the default value is `ease`, which starts slow, speeds up in the middle, and then slows down again in the end. Other options include `ease-out`, which is quick in the beginning then slows down, `ease-in`, which is slow in the beginning, then speeds up at the end, or `linear`, which applies a constant animation speed throughout.
+이 속성값으로 자주 사용되는 몇 가지 사전 지정된 키워드들이 있습니다. 예를 들어, 기본값은 `ease`로 설정되어 있습니다. 이 속성값을 가질 때는 애니메이션이 느리게 시작했다가 중간 지점에서 속도가 빨라지고, 서서히 느려지며 끝납니다. 다른 옵션으로는 애니메이션이 빠르게 시작했다가 끝으로 갈수록 점점 느려지는 `ease-out`, 느리게 시작했다가 끝으로 갈수록 점점 빨라지는 `ease-in`, 내내 일정한 속도가 적용되는 `linear` 등이 있습니다.
 
 # --instructions--
 
-For the elements with id of `ball1` and `ball2`, add an `animation-timing-function` property to each, and set `#ball1` to `linear`, and `#ball2` to `ease-out`. Notice the difference between how the elements move during the animation but end together, since they share the same `animation-duration` of 2 seconds.
+아이디가 `ball1`인 요소와 `ball2`인 요소에 `animation-timing-function` 속성을 지정해주세요. `#ball1`에는 `linear` 속성값을, `#ball2`에는 `ease-out` 속성값을 적용해주세요. 애니메이션이 실행되는 동안 요소들이 다르게 움직이지만, 2초의 동일한 `animation-duration` 값을 공유하므로 모두 함께 끝난다는 점에 주목하세요.
 
 # --hints--
 
-The value of the `animation-timing-function` property for the element with the id `ball1` should be `linear`.
+아이디가 `ball1`인 요소의 `animation-timing-function` 속성값은 `linear`이어야 합니다.
 
 ```js
 const ball1Animation = __helpers.removeWhiteSpace(
@@ -28,7 +28,7 @@ const ball1Animation = __helpers.removeWhiteSpace(
 assert(ball1Animation == 'linear' || ball1Animation == 'cubic-bezier(0,0,1,1)');
 ```
 
-The value of the `animation-timing-function` property for the element with the id `ball2` should be `ease-out`.
+아이디가 `ball2`인 요소의 `animation-timing-function` 속성값은 `ease-out`이어야 합니다.
 
 ```js
 const ball2Animation = __helpers.removeWhiteSpace(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/change-the-position-of-overlapping-elements-with-the-z-index-property.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/change-the-position-of-overlapping-elements-with-the-z-index-property.md
index 1cc3f610376..9e9e81d0077 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/change-the-position-of-overlapping-elements-with-the-z-index-property.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/change-the-position-of-overlapping-elements-with-the-z-index-property.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a3367417b2b2512acf
-title: Change the Position of Overlapping Elements with the z-index Property
+title: z-index 속성을 사용하여 겹쳐진 요소들의 위치를 변경하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cM94aHk'
 forumTopicId: 301046
@@ -9,15 +9,15 @@ dashedName: change-the-position-of-overlapping-elements-with-the-z-index-propert
 
 # --description--
 
-When elements are positioned to overlap (i.e. using `position: absolute | relative | fixed | sticky`), the element coming later in the HTML markup will, by default, appear on the top of the other elements. However, the `z-index` property can specify the order of how elements are stacked on top of one another. It must be an integer (i.e. a whole number and not a decimal), and higher values for the `z-index` property of an element move it higher in the stack than those with lower values.
+요소가 겹쳐질 때 (즉, `position: absolute | relative | fixed | sticky`를 사용할 때), HTML 마크업에서 뒤에 나오는 요소는 기본적으로 다른 요소들 위에 나타납니다. 그러나 `z-index` 속성은 요소가 서로 어떻게 쌓이는지의 순서를 지정할 수 있습니다. 이 값은 정수(즉, 소수점이 없는 정수)이어야 하며, 요소의 `z-index` 속성이 더 높은 값을 가지면 그 요소는 낮은 값을 가진 요소들보다 더 위에 쌓입니다.
 
 # --instructions--
 
-Add a `z-index` property to the element with the class name of `first` (the red rectangle) and set it to a value of 2 so it covers the other element (blue rectangle).
+클래스 이름이 `first`인 요소(빨간색 사각형)에 `z-index` 속성을 추가하고 값을 2로 설정하여 다른 요소(파란색 사각형)를 덮도록 만듭니다.
 
 # --hints--
 
-The element with class `first` should have a `z-index` value of 2.
+클래스 이름이 `first`인 요소는 `z-index`값이 2여야 합니다.
 
 ```js
 assert($('.first').css('z-index') == '2');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-gradual-css-linear-gradient.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-gradual-css-linear-gradient.md
index 35787cfba38..9e8f29c06dd 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-gradual-css-linear-gradient.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-gradual-css-linear-gradient.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a5367417b2b2512ad6
-title: Create a Gradual CSS Linear Gradient
+title: CSS 선형 그라데이션 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cg4dpt9'
 forumTopicId: 301047
@@ -9,15 +9,15 @@ dashedName: create-a-gradual-css-linear-gradient
 
 # --description--
 
-Applying a color on HTML elements is not limited to one flat hue. CSS provides the ability to use color transitions, otherwise known as gradients, on elements. This is accessed through the `background` property's `linear-gradient()` function. Here is the general syntax:
+HTML 요소에 색상을 적용하는 것은 단일 평면 색조에 제한되지 않습니다. CSS는 요소에 색상 전환 또는 그라데이션이라고도 하는 기능을 제공합니다. 이 기능은 `background` 속성의 `linear-gradient()` 함수를 통해 사용할 수 있습니다. 여기 일반적인 구문이 있습니다.
 
 ```css
 background: linear-gradient(gradient_direction, color 1, color 2, color 3, ...);
 ```
 
-The first argument specifies the direction from which color transition starts - it can be stated as a degree, where `90deg` makes a horizontal gradient (from left to right) and `45deg` makes a diagonal gradient (from bottom left to top right). The following arguments specify the order of colors used in the gradient.
+첫 번째 인수는 색상 전환을 시작하는 방향을 지정합니다. 이는 도(degree)로 나타낼 수 있으며, `90deg`는 수평 그라데이션(왼쪽에서 오른쪽으로), `45deg`는 대각선 그라데이션(왼쪽 아래에서 오른쪽 위로)을 만듭니다. 다음 인수들은 그라데이션에 사용되는 색상의 순서를 지정합니다.
 
-Example:
+예:
 
 ```css
 background: linear-gradient(90deg, red, yellow, rgb(204, 204, 255));
@@ -25,11 +25,11 @@ background: linear-gradient(90deg, red, yellow, rgb(204, 204, 255));
 
 # --instructions--
 
-Use a `linear-gradient()` for the `div` element's `background`, and set it from a direction of 35 degrees to change the color from `#CCFFFF` to `#FFCCCC`.
+`linear-gradient()`를 사용하여 `div` 요소의 `background`을 설정하고, 색상을 35도 방향으로 `#CCFFFF`에서 `#FFCCCC`으로 변경하도록 설정하세요.
 
 # --hints--
 
-The `div` element should have a `linear-gradient` `background` with the specified direction and colors.
+`div` 요소는 지정된 방향과 색상을 가진 `linear-gradient` `background`을 가져야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-graphic-using-css.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-graphic-using-css.md
index b3162a0453e..7b97d0e7b43 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-graphic-using-css.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-graphic-using-css.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a6367417b2b2512add
-title: Create a Graphic Using CSS
+title: CSS를 이용해 그래픽 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cEDWPs6'
 forumTopicId: 301048
@@ -9,33 +9,33 @@ dashedName: create-a-graphic-using-css
 
 # --description--
 
-By manipulating different selectors and properties, you can make interesting shapes. One of the easier ones to try is a crescent moon shape. For this challenge you need to work with the `box-shadow` property that sets the shadow of an element, along with the `border-radius` property that controls the roundness of the element's corners.
+다양한 선택자와 속성들을 조절함으로써 흥미로운 도형들을 만들 수 있습니다. 쉽게 시도해볼 수 있는 도형으로는 초승달 모양이 있습니다. 이 챌린지에서는 요소의 그림자를 설정하는 `box-shadow` 속성과 요소 모서리의 둥글기를 조정하는 `border-radius` 속성을 사용해야 합니다.
 
-You will create a round, transparent object with a crisp shadow that is slightly offset to the side - the shadow is actually going to be the moon shape you see.
+옆쪽으로 살짝 치우진 선명한 그림자를 가진 둥글고 투명한 도형을 만들어보세요. 사실은 이 그림자가 달 모양이 될 것입니다.
 
-In order to create a round object, the `border-radius` property should be set to a value of 50%.
+둥근 도형을 만들기 위해서는, `border-radius` 속성값을 50%로 설정해야 합니다.
 
-You may recall from an earlier challenge that the `box-shadow` property takes values for `offset-x`, `offset-y`, `blur-radius`, `spread-radius` and a `color` value in that order. The `blur-radius` and `spread-radius` values are optional.
+이전 챌린지에서 언급했듯이 `box-shadow` 속성은 `offset-x`, `offset-y`, `blur-radius`, `spread-radius` 및 `color` 값을 순서대로 사용합니다. `blur-radius`와 `spread-radius` 값은 선택 항목입니다.
 
 # --instructions--
 
-Manipulate the square element in the editor to create the moon shape. First, change the `background-color` to `transparent`, then set the `border-radius` property to 50% to make the circular shape. Finally, change the `box-shadow` property to set the `offset-x` to 25px, the `offset-y` to 10px, `blur-radius` to 0, `spread-radius` to 0, and `color` to `blue`.
+에디터에서 정사각형 도형을 조작해 달 모양으로 변형해주세요. 먼저 `background-color` 속성값을 `transparent`로 바꾸고, `border-radius` 속성값을 50%로 조정해 원형을 만들어주세요. 마지막으로 `box-shadow`속성은 `offset-x`를 25px로, `offset-y`를 10px로, `blut-radius`를 0으로, `spread-radius`를 0으로 지정하고, `color`는 `blue`로 지정해주세요.
 
 # --hints--
 
-The value of the `background-color` property should be set to `transparent`.
+`background-color</b> 속성값은 <code>transparent`이어야 합니다.
 
 ```js
 assert(code.match(/background-color:\s*?transparent;/gi));
 ```
 
-The value of the `border-radius` property should be set to `50%`.
+`border-radius` 속성값은 `50%`이어야 합니다.
 
 ```js
 assert(code.match(/border-radius:\s*?50%;/gi));
 ```
 
-The value of the `box-shadow` property should be set to 25px for `offset-x`, 10px for `offset-y`, 0 for `blur-radius`, 0 for `spread-radius`, and finally `blue` for the `color`.
+`box-shadow`속성값으로 `offset-x`는 25px, `offset-y`는10px, `blut-radius`는 0, `spread-radius`는 0, `color`는 `blue`로 설정해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-horizontal-line-using-the-hr-element.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-horizontal-line-using-the-hr-element.md
index 2db0b3baa57..e2ff4d67b3d 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-horizontal-line-using-the-hr-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-horizontal-line-using-the-hr-element.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781b367417b2b2512abb
-title: Create a Horizontal Line Using the hr Element
+title: hr 요소를 사용하여 수평선 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c3bR8t7'
 forumTopicId: 301049
@@ -9,23 +9,23 @@ dashedName: create-a-horizontal-line-using-the-hr-element
 
 # --description--
 
-You can use the `hr` tag to add a horizontal line across the width of its containing element. This can be used to define a change in topic or to visually separate groups of content.
+`<hr>` 태그를 사용하여 해당 요소의 너비 전체에 달하는 수평선을 추가할 수 있습니다. 이 선은 주제를 변경하거나 콘텐츠 그룹을 시각적으로 분리하는 데 사용될 수 있습니다.
 
 # --instructions--
 
-Add an `hr` tag underneath the `h4` which contains the card title.
+카드 제목을 포함하는 `h4` 아래에 `hr` 태그를 추가하세요.
 
-**Note:** In HTML, `hr` is a self-closing tag, and therefore doesn't need a separate closing tag.
+**참고:** HTML에서 `hr`은 스스로 닫히는 태그이기 때문에 별도의 닫는 태그가 필요하지 않습니다.
 
 # --hints--
 
-Your code should add an `hr` tag to the markup.
+코드에서 마크업에 `hr` 태그를 추가해야 합니다.
 
 ```js
 assert($('hr').length == 1);
 ```
 
-The `hr` tag should come between the title and the paragraph.
+`hr` 태그는 제목과 단락 사이에 와야 합니다.
 
 ```js
 assert(code.match(/<\/h4>\s*?<hr(>|\s*?\/>)\s*?<p>/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-more-complex-shape-using-css-and-html.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-more-complex-shape-using-css-and-html.md
index 8c8b5c1e5e5..8e7b00afe1d 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-more-complex-shape-using-css-and-html.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-a-more-complex-shape-using-css-and-html.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a6367417b2b2512ade
-title: Create a More Complex Shape Using CSS and HTML
+title: HTML과 CSS를 이용하여 더 복잡한 모양 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cPpz4fr'
 forumTopicId: 301050
@@ -9,7 +9,7 @@ dashedName: create-a-more-complex-shape-using-css-and-html
 
 # --description--
 
-One of the most popular shapes in the world is the heart shape, and in this challenge you'll create one using pure CSS. But first, you need to understand the `::before` and `::after` pseudo-elements. `::before` creates a pseudo-element that is the first child of the selected element; `::after` creates a pseudo-element that is the last child of the selected element. In the following example, a `::before` pseudo-element is used to add a rectangle to an element with the class `heart`:
+세계에서 가장 인기 있는 모양 중 하나는 하트 모양입니다. 이번 과제에서는 CSS만을 사용하여 하트 모양을 만들어 보겠습니다. 먼저 `::before`와 `::after` 가상 요소를 이해해야 합니다. `::before`는 선택한 요소의 첫 번째 자식인 가상 요소를 생성하며, `::after`는 선택한 요소의 마지막 자식인 가상 요소를 생성합니다. 다음 예제에서는 `::before` 가상 요소를 사용하여 클래스가 `heart`인 요소에 직사각형을 추가합니다:
 
 ```css
 .heart::before {
@@ -24,19 +24,19 @@ One of the most popular shapes in the world is the heart shape, and in this chal
 }
 ```
 
-For the `::before` and `::after` pseudo-elements to function properly, they must have a defined `content` property. This property is usually used to add things like a photo or text to the selected element. When the `::before` and `::after` pseudo-elements are used to make shapes, the `content` property is still required, but it's set to an empty string. In the above example, the element with the class of `heart` has a `::before` pseudo-element that produces a yellow rectangle with height and width of `50px` and `70px`, respectively. This rectangle has round corners due to its 25% `border-radius` and is positioned absolutely at `5px` from the left and `50px` above the top of the element.
+`::before` 및 `::after` 가상 요소가 올바르게 작동하려면 `content` 속성이 있어야 합니다. 이 속성은 일반적으로 선택한 요소에 사진이나 텍스트와 같은 내용을 추가하는 데 사용됩니다. `::before` 및 `::after` 가상 요소를 사용하여 모양을 만들 때에도 `content` 속성이 필요하지만 빈 문자열로 설정됩니다. 위의 예에서 `heart` 클래스를 가진 요소에는 높이 및 너비가 각각 `50px` 및 `70px`인 노란색 사각형을 생성하는 `::before` 가상 요소가 있습니다. 이 사각형은 25%의 `border-radius`로 인해 둥근 모서리를 가지며, 왼쪽에서 `5px` 떨어지고 요소의 위쪽에서 `50px`에 절대적으로 위치합니다.
 
 # --instructions--
 
-Transform the element on the screen to a heart. In the `.heart::after` selector, change the `background-color` to `pink` and the `border-radius` to 50%.
+화면에 있는 요소를 하트 모양으로 바꾸세요. `.heart::after` 선택자에서 `background-color`를 `pink`로 변경하고 `border-radius`를 50%로 변경하세요.
 
-Next, target the element with the class `heart` (just `heart`) and fill in the `transform` property. Use the `rotate()` function with -45 degrees.
+다음으로, 클래스 `heart`를 가진 요소를 대상으로 (`heart`만) `transform` 속성을 채우세요. `rotate()` 함수를 사용하여 -45도로 회전하세요.
 
-Finally, in the `.heart::before` selector, set its `content` property to an empty string.
+마지막으로 `.heart::before` 선택자에서 `content` 속성을 빈 문자열로 설정하세요.
 
 # --hints--
 
-The `background-color` property of the `.heart::after` selector should be `pink`.
+`.heart::after` 선택자의 `background-color` 속성은 `pink`로 되어 있어야 합니다.
 
 ```js
 const heartAfter = code.match(/\.heart::after\s*{[\s\S]+?[^\}]}/g)[0];
@@ -45,19 +45,19 @@ assert(
 );
 ```
 
-The `border-radius` of the `.heart::after` selector should be 50%.
+`.heart::after` 선택자의 `border-radius`는 50%여야 합니다.
 
 ```js
 assert(code.match(/border-radius\s*?:\s*?50%/gi).length == 2);
 ```
 
-The `transform` property for the `heart` class should use a `rotate()` function set to -45 degrees.
+`heart` 클래스의 `transform` 속성은 -45도로 설정된 `rotate()` 함수를 사용해야 합니다.
 
 ```js
 assert(code.match(/transform\s*?:\s*?rotate\(\s*?-45deg\s*?\)/gi));
 ```
 
-The `content` of the `.heart::before` selector should be an empty string.
+`.heart::before` 선택자의 `content`는 비어 있는 문자열이어야 합니다.
 
 ```js
 assert(code.match(/\.heart::before\s*?{\s*?content\s*?:\s*?("|')\1\s*?;/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-movement-using-css-animation.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-movement-using-css-animation.md
index e962328bc6d..6146edf6d70 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-movement-using-css-animation.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-movement-using-css-animation.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a7367417b2b2512ae1
-title: Create Movement Using CSS Animation
+title: CSS 애니메이션으로 움직임을 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c7amZfW'
 forumTopicId: 301051
@@ -9,9 +9,9 @@ dashedName: create-movement-using-css-animation
 
 # --description--
 
-When elements have a specified `position`, such as `fixed` or `relative`, the CSS offset properties `right`, `left`, `top`, and `bottom` can be used in animation rules to create movement.
+요소가 `fixed` 또는 `relative`와 같은 특정 `position`을 가지고 있을 때, CSS offset 속성인 `right`, `left`, `top`, 그리고 `bottom`을 사용하여 애니메이션을 만들 수 있습니다.
 
-As shown in the example below, you can push the item downwards then upwards by setting the `top` property of the `50%` keyframe to 50px, but having it set to 0px for the first (`0%`) and the last (`100%`) keyframe.
+아래 예제에서 보는 것처럼, `50%` 키프레임의 `top` 속성을 50px로 설정하고, 첫 번째(`0%`)와 마지막(`100%`) 키프레임에서는 0px로 설정하여 항목을 아래로 밀고 다시 위로 당길 수 있습니다
 
 ```css
 @keyframes rainbow {
@@ -32,23 +32,23 @@ As shown in the example below, you can push the item downwards then upwards by s
 
 # --instructions--
 
-Add a horizontal motion to the `div` animation. Using the `left` offset property, add to the `@keyframes` rule so rainbow starts at 0 pixels at `0%`, moves to 25 pixels at `50%`, and ends at -25 pixels at `100%`. Don't replace the `top` property in the editor - the animation should have both vertical and horizontal motion.
+`div` 에니메이션에 수평 움직임을 더하세요. `@keyframes` 규칙에 `left` 오프셋 속성을 사용하여 무지개가 `0%`에서 0px로 시작하여 `50%`에서 25px로 이동하고, `100%`에서 -25px로 끝나도록합니다. 에디터에서 `top` 속성을 교체하지 마세요. 애니메이션에는 수직 및 수평 움직임 둘 다 있어야 합니다.
 
 # --hints--
 
-The `@keyframes` rule for `0%` should use the `left` offset of 0px.
+`@keyframes` 규칙의 `0%` 부분은 `left` 오프셋을 0px로 사용해야 합니다.
 
 ```js
 assert(code.match(/[^50]0%\s*?{[\s\S]*?left:\s*?0px(;[\s\S]*?|\s*?)}/gi));
 ```
 
-The `@keyframes` rule for `50%` should use the `left` offset of 25px.
+`@keyframes` 규칙의 `50%` 부분은 `left` 오프셋을 25px로 사용해야 합니다.
 
 ```js
 assert(code.match(/50%\s*?{[\s\S]*?left:\s*?25px(;[\s\S]*?|\s*?)}/gi));
 ```
 
-The `@keyframes` rule for `100%` should use the `left` offset of -25px.
+`@keyframes` 규칙의 `100%` 부분은 `left` 오프셋을 -25px로 사용해야 합니다.
 
 ```js
 assert(code.match(/100%\s*?{[\s\S]*?left:\s*?-25px(;[\s\S]*?|\s*?)}/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-texture-by-adding-a-subtle-pattern-as-a-background-image.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-texture-by-adding-a-subtle-pattern-as-a-background-image.md
index 9afa1f18228..13019033bc4 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-texture-by-adding-a-subtle-pattern-as-a-background-image.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-texture-by-adding-a-subtle-pattern-as-a-background-image.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a5367417b2b2512ad8
-title: Create Texture by Adding a Subtle Pattern as a Background Image
+title: 작은 패턴을 배경 이미지로 추가하여 질감을 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cQdwJC8'
 forumTopicId: 301052
@@ -9,15 +9,15 @@ dashedName: create-texture-by-adding-a-subtle-pattern-as-a-background-image
 
 # --description--
 
-One way to add texture and interest to a background and have it stand out more is to add a subtle pattern. The key is balance, as you don't want the background to stand out too much, and take away from the foreground. The `background` property supports the `url()` function in order to link to an image of the chosen texture or pattern. The link address is wrapped in quotes inside the parentheses.
+아주 작은 패턴을 배경 이미지로 추가하는 것은 배경에 질감과 흥미를 더하고 두드러지게 만드는 한 가지 방법입니다. 핵심은 균형을 맞추는 것입니다. 배경이 너무 두드러지거나 전경에 맞춰져야 할 집중을 빼앗지 않아야 합니다. `background` 속성은 선택한 질감이나 패턴의 이미지에 링크하기 위해 `url()` 함수를 지원합니다. 링크 주소는 괄호 내에서 따옴표로 묶여 있습니다.
 
 # --instructions--
 
-Using the url of `https://cdn-media-1.freecodecamp.org/imgr/MJAkxbh.png`, set the `background` of the whole page with the `body` selector.
+지정된 URL `https://cdn-media-1.freecodecamp.org/imgr/MJAkxbh.png`을 사용하여 페이지 전체의 `background`를 설정합니다. `body` 선택자를 사용하세요.
 
 # --hints--
 
-Your `body` element should have a `background` property set to a `url()` with the given link.
+당신의 `body` 요소는 주어진 링크를 사용한 `url()`로 설정된 `background` 속성이 있어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-visual-balance-using-the-text-align-property.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-visual-balance-using-the-text-align-property.md
index 6706cf4c1bf..a234765e219 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-visual-balance-using-the-text-align-property.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-visual-balance-using-the-text-align-property.md
@@ -1,6 +1,6 @@
 ---
 id: 587d7791367417b2b2512ab3
-title: Create Visual Balance Using the text-align Property
+title: 문단 정렬 속성을 사용해 시각적 균형 이루기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c3b4EAp'
 forumTopicId: 301053
@@ -9,31 +9,31 @@ dashedName: create-visual-balance-using-the-text-align-property
 
 # --description--
 
-This section of the curriculum focuses on Applied Visual Design. The first group of challenges build on the given card layout to show a number of core principles.
+이번 단원에서는 응용 시각 디자인에 중점을 둡니다. 첫 번째 과제는 주어진 카드 레이아웃을 기반으로 여러 핵심 원칙을 보여줍니다.
 
-Text is often a large part of web content. CSS has several options for how to align it with the `text-align` property.
+글자는 웹 컨텐츠에서 큰 부분을 차지합니다. CSS에는 `text-align` 속성을 사용하여 텍스트를 정렬하는 여러 옵션이 있습니다.
 
-`text-align: justify;` spaces the text so that each line has equal width.
+`text-align: justify;`는 각 행이 동일한 너비를 가지도록 텍스트 사이를 공백으로 채웁니다.
 
-`text-align: center;` centers the text
+`text-align: center;`는 텍스트를 가운데 정렬로 만듭니다.
 
-`text-align: right;` right-aligns the text
+`text-align: right;`는 텍스트는 오른쪽 정렬합니다.
 
-And `text-align: left;` (the default) left-aligns the text.
+그리고 `text-align: left;`는 (기본값과 마찬가지로) 텍스트를 왼쪽 정렬합니다.
 
 # --instructions--
 
-Align the `h4` tag's text, which says "Google", to the center. Then justify the paragraph tag which contains information about how Google was founded.
+`h4` 태그의 텍스트인 "Google"을 가운데 정렬하십시오. 그런 다음 Google이 어떻게 설립되었는지에 대한 정보가 포함된 단락 태그를 맞춰 정렬하십시오.
 
 # --hints--
 
-Your code should use the text-align property on the `h4` tag to set it to `center`.
+코드에서 text-align 속성을 사용하여 `h4` 태그의 텍스트를 `center`에 맞추도록 설정해야 합니다.
 
 ```js
 assert($('h4').css('text-align') == 'center');
 ```
 
-Your code should use the text-align property on the `p` tag to set it to `justify`.
+코드에서 text-align 속성을 사용하여 `p` 태그의 텍스트를 `justify`로 설정해야 합니다.
 
 ```js
 assert($('p').css('text-align') == 'justify');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-visual-direction-by-fading-an-element-from-left-to-right.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-visual-direction-by-fading-an-element-from-left-to-right.md
index 288fc8ce760..e5e32bfc3ee 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-visual-direction-by-fading-an-element-from-left-to-right.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/create-visual-direction-by-fading-an-element-from-left-to-right.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a7367417b2b2512ae2
-title: Create Visual Direction by Fading an Element from Left to Right
+title: 왼쪽에서 오른쪽으로 요소가 점점 투명해지도록 시각적인 방향 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cGJqqAE'
 forumTopicId: 301054
@@ -9,17 +9,17 @@ dashedName: create-visual-direction-by-fading-an-element-from-left-to-right
 
 # --description--
 
-For this challenge, you'll change the `opacity` of an animated element so it gradually fades as it reaches the right side of the screen.
+이번 도전 과제에서는 애니메이션된 요소의 `opacity`를 변경하여 화면 오른쪽으로 갈수록 서서히 투명해지도록합니다.
 
-In the displayed animation, the round element with the gradient background moves to the right by the 50% mark of the animation per the `@keyframes` rule.
+표시된 애니메이션에서는 그라데이션 배경을 가진 둥근 요소가 애니메이션의 50% 지점까지 오른쪽으로 이동합니다. 이는 `@keyframes` 규칙에 따른 것입니다.
 
 # --instructions--
 
-Target the element with the id of `ball` and add the `opacity` property set to 0.1 at `50%`, so the element fades as it moves to the right.
+id가 `ball`인 요소를 대상으로 하여 `opacity` 속성을 추가하고, 해당 속성을 `50%`일 때 0.1로 설정하여 요소가 오른쪽으로 이동할 때 서서히 흐려지도록 합니다.
 
 # --hints--
 
-The `keyframes` rule for fade should set the `opacity` property to 0.1 at 50%.
+fade에 대한 `keyframes`규칙은 `opacity` 속성을 50%일 때 0.1로 설정해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/decrease-the-opacity-of-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/decrease-the-opacity-of-an-element.md
index b1f56806252..a6e2475660c 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/decrease-the-opacity-of-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/decrease-the-opacity-of-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781c367417b2b2512abf
-title: Decrease the Opacity of an Element
+title: 요소의 불투명도 감소시키기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c7aKqu4'
 forumTopicId: 301055
@@ -9,19 +9,19 @@ dashedName: decrease-the-opacity-of-an-element
 
 # --description--
 
-The `opacity` property in CSS is used to adjust the opacity, or conversely, the transparency for an item.
+CSS의 `opacity` 속성은 아이템의 불투명도, 혹은 반대로 투명도를 조절하는 데 사용됩니다.
 
-<blockquote>A value of 1 is opaque, which isn't transparent at all.<br>A value of 0.5 is half see-through.<br>A value of 0 is completely transparent.</blockquote>
+<blockquote>불투명도 값이 1이면 전혀 투명하지 않은 불투명한 상태입니다.<br>값이 0.5면 반투명합니다.<br>값이 0이면 완전히 투명합니다.</blockquote>
 
-The value given will apply to the entire element, whether that's an image with some transparency, or the foreground and background colors for a block of text.
+주어진 값은 투명도가 있는 이미지든 텍스트 블록의 전경 및 배경 색상이든 전체 요소에 적용됩니다.
 
 # --instructions--
 
-Set the `opacity` of the anchor tags to 0.7 using `links` class to select them.
+`links` 클래스를 사용하여 앵커 태그를 선택하고 `opacity`를 0.7로 설정하십시오.
 
 # --hints--
 
-Your code should set the `opacity` property to 0.7 on the anchor tags by selecting the class of `links`.
+코드는 `links` 클래스를 선택하여 앵커 태그의 `opacity` 속성을 0.7로 설정해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-about-complementary-colors.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-about-complementary-colors.md
index 233517e23d5..759b844bf5c 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-about-complementary-colors.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-about-complementary-colors.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a3367417b2b2512ad1
-title: Learn about Complementary Colors
+title: 보색 배워 보기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c2MD3Tr'
 forumTopicId: 301056
@@ -9,33 +9,33 @@ dashedName: learn-about-complementary-colors
 
 # --description--
 
-Color theory and its impact on design is a deep topic and only the basics are covered in the following challenges. On a website, color can draw attention to content, evoke emotions, or create visual harmony. Using different combinations of colors can really change the look of a website, and a lot of thought can go into picking a color palette that works with your content.
+색채 이론과 그것이 디자인에 미치는 영향력에 대해서는 아주 깊이 들어갈 수도 있는 주제이기 때문에, 이번 챌린지에서는 기초만 다룰 예정입니다. 웹 사이트에서 색상은 콘텐츠에 대한 관심을 끌거나 감정을 일깨우기도 하고, 혹은 시각적 조화를 만들어 내기도 합니다. 색상을 다르게 조합하는 것으로 웹 사이트가 완전히 달라 보이게도 할 수 있으며, 콘텐츠와 잘 부합하는 색상을 찾기 위해 많은 것을 고려해야 하기도 합니다.
 
-The color wheel is a useful tool to visualize how colors relate to each other - it's a circle where similar hues are neighbors and different hues are farther apart. When two colors are opposite each other on the wheel, they are called complementary colors. They have the characteristic that if they are combined, they "cancel" each other out and create a gray color. However, when placed side-by-side, these colors appear more vibrant and produce a strong visual contrast.
+색상환은 색상 간의 관계를 시각화할 때 좋은 도구로, 서로 비슷한 색은 가까이, 다른 색은 멀리 떨어져 있는 원입니다. 두 색상이 서로 고리 반대편에 있을 경우 그 색상을 보색이라고 부릅니다. 이들은 섞였을 때 서로의 색상을 "상쇄하고" 회색을 만들어 내는 특성이 있습니다. 하지만 이들을 나란히 배치하면 색상이 더욱 선명해 보이며 강렬한 시각적 대비를 만들어 냅니다.
 
-Some examples of complementary colors with their hex codes are:
+다음은 보색과 그 헥스 코드의 몇 가지 예시입니다.
 
-<blockquote>red (#FF0000) and cyan (#00FFFF)<br>green (#00FF00) and magenta (#FF00FF)<br>blue (#0000FF) and yellow (#FFFF00)</blockquote>
+<blockquote>빨간색 (#FF0000) 과 청록색 (#00FFFF)<br>초록색 (#00FF00) 과 자홍색 (#FF00FF)<br>파란색 (#0000FF) 과 노란색 (#FFFF00)</blockquote>
 
-This is different than the outdated RYB color model that many of us were taught in school, which has different primary and complementary colors. Modern color theory uses the additive RGB model (like on a computer screen) and the subtractive CMY(K) model (like in printing).
+이는 흔히 학교에서 배웠던 낡은 RYB 색상 모델과는 다릅니다. 원색도 보색도 다르지요. 현대 색채 이론은 컴퓨터 화면과 같은 RGB 가산 혼합 모델과 프린터로 인쇄할 때와 같은 CMY(K) 감산 혼합 모델을 사용합니다.
 
-There are many color picking tools available online that have an option to find the complement of a color.
+어떤 색상의 보색을 찾아 주는 옵션이 있는 색상 선택 도구는 온라인에서 쉽게 찾을 수 있습니다.
 
-**Note:** Using color can be a powerful way to add visual interest to a page. However, color alone should not be used as the only way to convey important information because users with visual impairments may not understand that content. This issue will be covered in more detail in the Applied Accessibility challenges.
+**참고:** 색상의 사용은 어떤 페이지에 시각적 흥미를 더하는 강력한 방법이 될 수 있습니다. 그러나 중요한 정보를 전달하는 유일한 방법으로 오로지 색상만 사용해서는 안 됩니다. 시각 장애가 있는 사용자는 콘텐츠를 이해하기 어려울 수도 있기 때문입니다. 이 문제는 접근성 활용 챌린지에서 더 자세히 다룰 예정입니다.
 
 # --instructions--
 
-Change the `background-color` property of the `blue` and `yellow` classes to their respective colors. Notice how the colors look different next to each other than they do compared against the white background.
+`background-color` 속성을 `blue`와 `yellow` 클래스에서 해당 색상으로 바꿔 보세요. 배경이 흰색인 경우와 비교했을 때 색상이 서로 어떻게 다르게 보이는지 확인해 보세요.
 
 # --hints--
 
-The `div` element with class `blue` should have a `background-color` of blue.
+`blue` 클래스의 `div` 엘리먼트는 `background-color`가 파란색이어야 합니다.
 
 ```js
 assert($('.blue').css('background-color') == 'rgb(0, 0, 255)');
 ```
 
-The `div` element with class `yellow` should have a `background-color` of yellow.
+`yellow` 클래스의 `div` 엘리먼트는 `background-color`가 노란색이어야 합니다.
 
 ```js
 assert($('.yellow').css('background-color') == 'rgb(255, 255, 0)');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-about-tertiary-colors.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-about-tertiary-colors.md
index 1be76bc8ef9..02d804ee047 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-about-tertiary-colors.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-about-tertiary-colors.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a4367417b2b2512ad2
-title: Learn about Tertiary Colors
+title: 3차 색 배워 보기
 challengeType: 0
 forumTopicId: 301057
 dashedName: learn-about-tertiary-colors
@@ -8,41 +8,41 @@ dashedName: learn-about-tertiary-colors
 
 # --description--
 
-Computer monitors and device screens create different colors by combining amounts of red, green, and blue light. This is known as the RGB additive color model in modern color theory. Red (R), green (G), and blue (B) are called primary colors. Mixing two primary colors creates the secondary colors cyan (G + B), magenta (R + B) and yellow (R + G). You saw these colors in the Complementary Colors challenge. These secondary colors happen to be the complement to the primary color not used in their creation, and are opposite to that primary color on the color wheel. For example, magenta is made with red and blue, and is the complement to green.
+컴퓨터 모니터와 디바이스의 화면은 빨간색, 초록색, 파란색 빛의 양을 조합하여 다양한 색을 만들어 냅니다. 이는 현대 색채 이론에서 RGB 가산 색상 모델로 알려져 있습니다. 빨간색(R), 초록색(G), 파란색(B)을 원색이라고 부릅니다. 두 가지 원색을 혼합하면 2차색인 청록색(초록색 + 파란색), 자홍색(빨간색 + 파란색), 노란색(빨간색 + 초록색)이 만들어집니다. 보색 챌린지에서 이 색상들을 보셨을 겁니다. 이 2차 색들은 그 색상을 만들 때 사용되지 않은 원색의 보색이 되며, 색상환에서 바로 그 원색의 반대편에 위치합니다. 예를 들어 빨간색과 파란색의 혼합으로 만들어지는 자홍색은 초록색과 보색 관계입니다.
 
-Tertiary colors are the result of combining a primary color with one of its secondary color neighbors. For example, within the RGB color model, red (primary) and yellow (secondary) make orange (tertiary). This adds six more colors to a simple color wheel for a total of twelve.
+3차 색은 원색 한 가지와, 그 원색과 인접한 2차 색의 혼합으로 만들어집니다. 예를 들어 RGB 색상 모델에서 빨간색(원색)과 노란색(2차 색)을 혼합하면 주황색(3차 색)이 됩니다. 이로써 단순한 색상환에 여섯 가지 색상이 더해지면서 총 열두 개의 색상이 됩니다.
 
-There are various methods of selecting different colors that result in a harmonious combination in design. One example that can use tertiary colors is called the split-complementary color scheme. This scheme starts with a base color, then pairs it with the two colors that are adjacent to its complement. The three colors provide strong visual contrast in a design, but are more subtle than using two complementary colors.
+각기 다른 색상의 선택으로 디자인에서 조화로운 조합을 만들어 내는 방법은 다양합니다. 3차 색을 사용하는 한 가지 예시로 근접 보색 배색이 있습니다. 이 배색은 먼저 기준 색을 고르고 그 색상의 보색에 근접한 두 색상을 조합하는 방법입니다. 이 세 가지 색상은 디자인에서 강렬한 시각적 대비를 제공하는 한편, 두 가지 보색을 사용하는 것보다는 미묘한 느낌을 줍니다.
 
-Here are three colors created using the split-complement scheme:
+다음 세 가지 색상은 근접 보색 배색을 사용하여 만들어진 것입니다.
 
-<table><thead><tr><th>Color</th><th>Hex Code</th></tr></thead><thead></thead><tbody><tr><td>orange</td><td>#FF7F00</td></tr><tr><td>cyan</td><td>#00FFFF</td></tr><tr><td>raspberry</td><td>#FF007F</td></tr></tbody></table>
+<table><thead><tr><th>색상</th><th>헥스 코드</th></tr></thead><thead></thead><tbody><tr><td>주황색</td><td>#FF7F00</td></tr><tr><td>청록색</td><td>#00FFFF</td></tr><tr><td>라즈베리 색</td><td>#FF007F</td></tr></tbody></table>
 
 # --instructions--
 
-Change the `background-color` property of the `orange`, `cyan`, and `raspberry` classes to their respective colors. Make sure to use the hex codes and not the color names.
+`background-color` 속성을 `orange`, `cyan`, `raspberry` 클래스에서 해당 색상으로 바꿔 보세요. 색상의 이름이 아닌 헥스 코드를 사용해야 합니다.
 
 # --hints--
 
-The `div` element with class `orange` should have a `background-color` of orange.
+`orange` 클래스의 `div` 엘리먼트는 `background-color`가 주황색이어야 합니다.
 
 ```js
 assert($('.orange').css('background-color') == 'rgb(255, 127, 0)');
 ```
 
-The `div` element with class `cyan` should have a `background-color` of cyan.
+`cyan` 클래스의 `div` 엘리먼트는 `background-color`가 청록색이어야 합니다.
 
 ```js
 assert($('.cyan').css('background-color') == 'rgb(0, 255, 255)');
 ```
 
-The `div` element with class `raspberry` should have a `background-color` of raspberry.
+`raspberry` 클래스의 `div` 엘리먼트는 `background-color`가 라즈베리 색이어야 합니다.
 
 ```js
 assert($('.raspberry').css('background-color') == 'rgb(255, 0, 127)');
 ```
 
-All `background-color` values for the color classes should be hex codes and not color names.
+색상 클래스의 모든 `background-color` 값은 색상의 이름이 아닌 헥스 코드여야 합니다.
 
 ```js
 assert(!/background-color:\s(orange|cyan|raspberry)/.test(code));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-how-bezier-curves-work.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-how-bezier-curves-work.md
index 14f512c5533..f1800205d68 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-how-bezier-curves-work.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-how-bezier-curves-work.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a9367417b2b2512ae8
-title: Learn How Bezier Curves Work
+title: 베지에 곡선(Bezier curve)에 대해 배우기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c9bDrs8'
 forumTopicId: 301058
@@ -9,25 +9,25 @@ dashedName: learn-how-bezier-curves-work
 
 # --description--
 
-The last challenge introduced the `animation-timing-function` property and a few keywords that change the speed of an animation over its duration. CSS offers an option other than keywords that provides even finer control over how the animation plays out, through the use of Bezier curves.
+지난 도전 과제에서는 `animation-timing-function` 속성과 애니메이션 기간 동안 애니메이션 속도를 변경하는 몇 가지 키워드를 소개했습니다. CSS는 키워드 사용 이외에도 베지에 곡선을 사용하여 애니메이션이 어떻게 진행되는지에 대한 더 정교한 제어를 가능하게 해줍니다.
 
-In CSS animations, Bezier curves are used with the `cubic-bezier` function. The shape of the curve represents how the animation plays out. The curve lives on a 1 by 1 coordinate system. The X-axis of this coordinate system is the duration of the animation (think of it as a time scale), and the Y-axis is the change in the animation.
+CSS 애니메이션에서 베지에 곡선은 `cubic-bezier` 함수와 함께 사용됩니다. 곡선의 모양은 애니메이션이 어떻게 진행되는지를 나타냅니다. 그 곡선은 1x1 좌표 시스템에서 존재합니다. 이 좌표 시스템의 X 축은 애니메이션의 지속 시간입니다(시간 척도로 생각할 수 있습니다), Y 축은 애니메이션의 변화입니다.
 
-The `cubic-bezier` function consists of four main points that sit on this 1 by 1 grid: `p0`, `p1`, `p2`, and `p3`. `p0` and `p3` are set for you - they are the beginning and end points which are always located respectively at the origin (0, 0) and (1, 1). You set the x and y values for the other two points, and where you place them in the grid dictates the shape of the curve for the animation to follow. This is done in CSS by declaring the x and y values of the `p1` and `p2` "anchor" points in the form: `(x1, y1, x2, y2)`. Pulling it all together, here's an example of a Bezier curve in CSS code:
+`cubic-bezier` 함수는 이 1x1 그리드에 위치한 네 개의 주요 지점으로 구성됩니다. 이 네 개의 지점은`p0`, `p1`, `p2`, `p3`입니다. `p0` 및 `p3`은 이미 설정되어 있습니다. 이는 각각 항상 원점 (0, 0)과 (1, 1)에 위치하는 시작점과 종료점입니다. 다른 두 지점에 대한 x 및 y 값을 설정하고 그리드 내에서 어디에 배치하느냐에 따라 애니메이션의 곡선 모양이 결정됩니다. CSS에서는 `p1` 및 `p2` "앵커" 지점의 x 및 y 값을 다음 형식으로 선언하여 만들 수 있습니다. `(x1, y1, x2, y2)` 모든 것을 종합하면 다음은 베지에 곡선의 CSS 코드의 예시입니다.
 
 ```css
 animation-timing-function: cubic-bezier(0.25, 0.25, 0.75, 0.75);
 ```
 
-In the example above, the x and y values are equivalent for each point (x1 = 0.25 = y1 and x2 = 0.75 = y2), which if you remember from geometry class, results in a line that extends from the origin to point (1, 1). This animation is a linear change of an element during the length of an animation, and is the same as using the `linear` keyword. In other words, it changes at a constant speed.
+위의 예에서는 각 포인트에 대한 x 및 y 값이 동일합니다 (x1 = 0.25 = y1 및 x2 = 0.75 = y2). 이는 기하학 수업에서 기억할 수 있듯이 원점에서 (1, 1)로 이어지는 선을 생성합니다. 이 애니메이션은 애니메이션 길이의 선형 변경이며 `linear` 키워드를 사용하는 것과 동일합니다. 다시 말하자면, 일정한 속도로 변경됩니다.
 
 # --instructions--
 
-For the element with the id of `ball1`, change the value of the `animation-timing-function` property from `linear` to its equivalent `cubic-bezier` function value. Use the point values given in the example above.
+id가 `ball1`인 요소의 `animation-timing-function` 속성 값을 `linear`에서 이와 동등한 `cubic-bezier` 함수 값으로 변경하세요. 예제에서 제공된 지점 값을 사용하세요.
 
 # --hints--
 
-The value of the `animation-timing-function` property for the element with the id `ball1` should be the linear-equivalent `cubic-bezier` function.
+id가 `ball1`인 요소의 `animation-timing-function` 속성 값은 선형과 동등한 `cubic-bezier` 함수여야 합니다.
 
 ```js
 assert(
@@ -36,7 +36,7 @@ assert(
 );
 ```
 
-The value of the `animation-timing-function` property for the element with the id `ball2` should not change.
+`ball2` id를 가진 요소의 `animation-timing-function` 속성 값은 변경하지 않아야 합니다.
 
 ```js
 const ball2Animation = __helpers.removeWhiteSpace(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-how-the-css-keyframes-and-animation-properties-work.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-how-the-css-keyframes-and-animation-properties-work.md
index e91a65e334a..f49104b06a1 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-how-the-css-keyframes-and-animation-properties-work.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/learn-how-the-css-keyframes-and-animation-properties-work.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a7367417b2b2512adf
-title: Learn How the CSS @keyframes and animation Properties Work
+title: CSS @keyframes 규칙과 animation 속성이 어떻게 작동하는지 알기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cakprhv'
 forumTopicId: 301059
@@ -9,13 +9,13 @@ dashedName: learn-how-the-css-keyframes-and-animation-properties-work
 
 # --description--
 
-To animate an element, you need to know about the animation properties and the `@keyframes` rule. The animation properties control how the animation should behave and the `@keyframes` rule controls what happens during that animation. There are eight animation properties in total. This challenge will keep it simple and cover the two most important ones first:
+요소에 애니메이션을 적용하려면 animation 속성 및 `@keyframes`규칙에 대해 이해해야 합니다 Animation 속성은 애니메이션 동작을 제어하며, `@keyframes` 규칙은 애니메이션이 진행되는 동안 중간 동작을 정의합니다. Animation 속성은 총 8가지가 있습니다. 이 챌린지에서는 간단하게 두 가지 주요 측면을 다룰 것입니다.
 
-`animation-name` sets the name of the animation, which is later used by `@keyframes` to tell CSS which rules go with which animations.
+`animation-name` 속성은 애니메이션의 이름을 설정합니다. 이 이름은 `@keyframes`를 사용할 때 CSS에게 어떤 규칙이 어떤 애니메이션에 적용되어야 하는지 알려줍니다.
 
-`animation-duration` sets the length of time for the animation.
+`animation-duration` 속성은 애니메이션이 한 사이클을 완료하는 데 걸리는 시간을 지정합니다.
 
-`@keyframes` is how to specify exactly what happens within the animation over the duration. This is done by giving CSS properties for specific "frames" during the animation, with percentages ranging from 0% to 100%. If you compare this to a movie, the CSS properties for 0% is how the element displays in the opening scene. The CSS properties for 100% is how the element appears at the end, right before the credits roll. Then CSS applies the magic to transition the element over the given duration to act out the scene. Here's an example to illustrate the usage of `@keyframes` and the animation properties:
+`@keyframes`은 애니메이션의 지속 시간 동안 정확히 어떤 동작들이 발생하는지를 지정할 때 사용됩니다. 애니메이션이 실행되는 동안, 0%에서 100%까지의 백분율로 이루어진 특정 "프레임"에 대해 CSS 속성을 지정하면 됩니다. 영화와 비교해보면, 0%에 적용되는 CSS 속성은 요소가 영화 첫 장면에서 어떻게 보여질 것인지를 나타냅니다. 한편 100%에 적용되는 CSS 속성들은 영화 마지막, 즉 엔딩 크레딧 직전에 요소가 어떻게 보여질지를 나타냅니다. 그런 다음, CSS는 해당 장면을 연출하기 위해 주어진 기간 동안 요소를 부드럽게 전환하는 특별한 기술을 적용합니다. `@keyframes`와 애니메이션 속성의 사용법을 설명하기 위한 예제가 있습니다.
 
 ```css
 #anim {
@@ -33,45 +33,45 @@ To animate an element, you need to know about the animation properties and the `
 }
 ```
 
-For the element with the `anim` id, the code snippet above sets the `animation-name` to `colorful` and sets the `animation-duration` to 3 seconds. Then the `@keyframes` rule links to the animation properties with the name `colorful`. It sets the color to blue at the beginning of the animation (0%) which will transition to yellow by the end of the animation (100%). You aren't limited to only beginning-end transitions, you can set properties for the element for any percentage between 0% and 100%.
+`anim`이라는 id를 가진 요소에 대해, 위의 코드는 `colorful`이라는 `animation-name`을 부여하고 `animation-duration`은 3초로 지정합니다. 그리고 `@keyframes` 규칙은 `colorful`라는 이름의 애니메이션 속성들과 연결됩니다. 애니메이션의 시작 지점(0%) 에서는 색깔이 파란색이었다가, 애니메이션의 종료 지점(100%) 에서는 노란색이 되도록 전환이 이루어집니다. 애니메이션의 시작 지점과 종료 지점 간에만 국한되지 않고, 0% 부터 100% 사이의 모든 백분율에 대해 요소의 속성을 지정할 수 있습니다.
 
 # --instructions--
 
-Create an animation for the element with the id `rect`, by setting the `animation-name` to `rainbow` and the `animation-duration` to 4 seconds. Next, declare a `@keyframes` rule, and set the `background-color` at the beginning of the animation (`0%`) to blue, the middle of the animation (`50%`) to green, and the end of the animation (`100%`) to yellow.
+`rect`라는 id를 가진 요소에 대해 애니메이션을 생성합니다. `animation-name`은 `rainbow`로 설정하고, `animation-duration`은 4초로 설정합니다. 그 다음, `@keyframes` 규칙을 선언합니다. 애니메이션의 시작점(`0%`) 에서는 `background-color`를 파란색으로, 중간 지점(`50%`) 에서는 초록색으로, 종료 지점(`100%`) 에서는 노란색으로 전환됩니다.
 
 # --hints--
 
-The element with id of `rect` should have an `animation-name` property with a value of `rainbow`.
+`rect`라는 id를 가진 요소는 `animation-name`이라는 속성을 가져야 하며 이 속성값은 `rainbow`어야 합니다.
 
 ```js
 assert($('#rect').css('animation-name') == 'rainbow');
 ```
 
-The element with id of `rect` should have an `animation-duration` property with a value of 4s.
+`rect`라는 id를 가진 요소는 `animation-duration`이라는 속성을 가져야 하며 이 속성값은 4초로 지정돼야 합니다.
 
 ```js
 assert($('#rect').css('animation-duration') == '4s');
 ```
 
-The `@keyframes` rule should use the `animation-name` of `rainbow`.
+`@keyframes`규칙은 `rainbow`라는 `animation-name`에 적용됩니다.
 
 ```js
 assert(code.match(/@keyframes\s+?rainbow\s*?{/g));
 ```
 
-The `@keyframes` rule for `rainbow` should use a `background-color` of `blue` at 0%.
+`rainbow`에 적용되는 `@keyframes` 규칙은 0%에서 `background-color`를 `blue`로 설정해야 합니다.
 
 ```js
 assert(code.match(/0%\s*?{\s*?background-color:\s*?blue;\s*?}/gi));
 ```
 
-The `@keyframes` rule for `rainbow` should use a `background-color` of `green` at 50%.
+`rainbow`에 적용되는 `@keyframes` 규칙은 50%에서 `background-color`를 `green`로 설정해야 합니다.
 
 ```js
 assert(code.match(/50%\s*?{\s*?background-color:\s*?green;\s*?}/gi));
 ```
 
-The `@keyframes` rule for rainbow should use a `background-color` of `yellow` at 100%.
+`rainbow`에 적용되는 `@keyframes` 규칙은 100%에서 `background-color`를 `yellow`로 설정해야 합니다.
 
 ```js
 assert(code.match(/100%\s*?{\s*?background-color:\s*?yellow;\s*?}/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/lock-an-element-to-its-parent-with-absolute-positioning.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/lock-an-element-to-its-parent-with-absolute-positioning.md
index 0eb38a456a4..80040177060 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/lock-an-element-to-its-parent-with-absolute-positioning.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/lock-an-element-to-its-parent-with-absolute-positioning.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781e367417b2b2512acb
-title: Lock an Element to its Parent with Absolute Positioning
+title: 절대 위치 지정을 사용하여 요소를 부모에 고정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cyLJ7c3'
 forumTopicId: 301060
@@ -9,29 +9,29 @@ dashedName: lock-an-element-to-its-parent-with-absolute-positioning
 
 # --description--
 
-The next option for the CSS `position` property is `absolute`, which locks the element in place relative to its parent container. Unlike the `relative` position, this removes the element from the normal flow of the document, so surrounding items ignore it. The CSS offset properties (top or bottom and left or right) are used to adjust the position.
+CSS의 `position` 속성의 다음 옵션은 `absolute`로, 이는 요소를 부모 컨테이너를 기준으로 위치를 정합니다. `relative` 위치와는 다르게 요소를 문서의 일반적인 흐름에서 제거하여 주변 항목을 무시하게 됩니다. CSS 오프셋 속성 (위쪽, 아래쪽, 왼쪽, 또는 오른쪽) 을 사용하여 위치를 조절합니다.
 
-One nuance with absolute positioning is that it will be locked relative to its closest *positioned* ancestor. If you forget to add a position rule to the parent item, (this is typically done using `position: relative;`), the browser will keep looking up the chain and ultimately default to the `body` tag.
+절대 위치 지정이란 가장 가까운 *positioned(위치가 지정되있는)* 조상을 기준으로 고정된다는 것입니다. 부모 항목에 위치 규칙을 추가하는 것을 잊으면 (일반적으로 `position: relative;`를 사용하여 이루어집니다), 브라우저는 계속해서 체인을 검색하여 최종적으로 `body` 태그를 기본값으로 설정합니다.
 
 # --instructions--
 
-Lock the `#searchbar` element to the top-right of its `section` parent by declaring its `position` as `absolute`. Give it `top` and `right` offsets of 50 pixels each.
+`position`을 `absolute`으로 선언하여 `#searchbar` 요소를 `section` 부모의 오른쪽 상단에 고정해 주세요. `top`과 `right`에 각각 50 픽셀의 오프셋을 부여합니다.
 
 # --hints--
 
-The `#searchbar` element should have a `position` set to `absolute`.
+`#searchbar` 요소의 `position`을 `absolute`으로 설정합니다.
 
 ```js
 assert($('#searchbar').css('position') == 'absolute');
 ```
 
-Your code should use the `top` CSS offset of 50 pixels on the `#searchbar` element.
+`#searchbar` 요소에 50 픽셀의 `top` CSS 오프셋을 사용합니다.
 
 ```js
 assert($('#searchbar').css('top') == '50px');
 ```
 
-Your code should use the `right` CSS offset of 50 pixels on the `#searchbar` element.
+`#searchbar` 요소에 50 픽셀의 `right` CSS 오프셋을 사용합니다.
 
 ```js
 assert($('#searchbar').css('right') == '50px');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/lock-an-element-to-the-browser-window-with-fixed-positioning.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/lock-an-element-to-the-browser-window-with-fixed-positioning.md
index 3909a6ce24a..5272223eccd 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/lock-an-element-to-the-browser-window-with-fixed-positioning.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/lock-an-element-to-the-browser-window-with-fixed-positioning.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781e367417b2b2512acc
-title: Lock an Element to the Browser Window with Fixed Positioning
+title: 브라우저 창에 요소를 고정 위치로 설정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c2MDNUR'
 forumTopicId: 301061
@@ -9,29 +9,29 @@ dashedName: lock-an-element-to-the-browser-window-with-fixed-positioning
 
 # --description--
 
-The next layout scheme that CSS offers is the `fixed` position, which is a type of absolute positioning that locks an element relative to the browser window. Similar to absolute positioning, it's used with the CSS offset properties and also removes the element from the normal flow of the document. Other items no longer "realize" where it is positioned, which may require some layout adjustments elsewhere.
+CSS가 제공하는 다음 레이아웃은 `fixed` 위치입니다. 이는 브라우저 창에 대해 요소를 상대적으로 고정하는 절대 위치 지정 유형입니다. 절대 위치 지정과 유사하게 CSS 오프셋 속성과 함께 사용되며 문서의 정상 흐름에서 요소를 제거합니다. 다른 항목들은 이제 해당 요소가 어디에 위치한지 "인식"하지 못하게 되며, 이로 인해 다른 곳에서 일부 레이아웃 조정이 필요할 수 있습니다.
 
-One key difference between the `fixed` and `absolute` positions is that an element with a fixed position won't move when the user scrolls.
+`fixed`와 `absolute` 위치의 주요 차이점 중 하나는 fixed 위치를 가진 요소는 사용자가 스크롤할 때 움직이지 않는다는 것입니다.
 
 # --instructions--
 
-The navigation bar in the code is labeled with an id of `navbar`. Change its `position` to `fixed`, and offset it 0 pixels from the `top` and 0 pixels from the `left`. After you have added the code, scroll the preview window to see how the navigation stays in place.
+코드에서 네비게이션 바는 `navbar`라는 id로 지정되어 있습니다. 이 네비게이션바의 `position`을 `fixed`로 변경하고, `top`에서 0 픽셀, `left`에서 0 픽셀로 오프셋하십시오. 코드를 작성한 후 미리보기 창을 스크롤하면서 내비게이션이 제 위치에 머물러 있는지 확인해보세요.
 
 # --hints--
 
-The `#navbar` element should have a `position` set to `fixed`.
+`#navbar` 요소의 `position` 속성을 `fixed`로 설정해야 합니다.
 
 ```js
 assert($('#navbar').css('position') == 'fixed');
 ```
 
-Your code should use the `top` CSS offset of 0 pixels on the `#navbar` element.
+`#navbar` 요소의 `top` CSS 오프셋을 0 픽셀로 설정해야 합니다.
 
 ```js
 assert($('#navbar').css('top') == '0px');
 ```
 
-Your code should use the `left` CSS offset of 0 pixels on the `#navbar` element.
+`#navbar` 요소의 `left` CSS 오프셋을 0 픽셀로 설정해야 합니다.
 
 ```js
 assert($('#navbar').css('left') == '0px');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/make-a-css-heartbeat-using-an-infinite-animation-count.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/make-a-css-heartbeat-using-an-infinite-animation-count.md
index 651d36a0dd3..e27328f99f0 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/make-a-css-heartbeat-using-an-infinite-animation-count.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/make-a-css-heartbeat-using-an-infinite-animation-count.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a8367417b2b2512ae4
-title: Make a CSS Heartbeat using an Infinite Animation Count
+title: 무한한 애니메이션 횟수를 사용하여 CSS 두근두근 심장 에니메이션 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cDZpDUr'
 forumTopicId: 301062
@@ -9,23 +9,23 @@ dashedName: make-a-css-heartbeat-using-an-infinite-animation-count
 
 # --description--
 
-Here's one more continuous animation example with the `animation-iteration-count` property that uses the heart you designed in a previous challenge.
+이전 챌린지에서 디자인한 하트를 사용하는 `animation-iteration-count` 속성을 활용한 또 다른 연속 애니메이션 예제가 있습니다.
 
-The one-second long heartbeat animation consists of two animated pieces. The `heart` elements (including the `:before` and `:after` pieces) are animated to change size using the `transform` property, and the background `div` is animated to change its color using the `background` property.
+1초 동안 계속되는 심장 박동 애니메이션은 두 개의 애니메이션 요소로 구성되어 있습니다. `heart` 요소들 (그 중에 `:before`와 `:after` 부분도 포함)은 `transform` 속성을 사용하여 크기를 변경하는 애니메이션을 적용받고, 배경 `div`은 `background` 속성을 사용하여 색상을 변경하는 애니메이션을 적용받습니다.
 
 # --instructions--
 
-Keep the heart beating by adding the `animation-iteration-count` property for both the `back` class and the `heart` class and setting the value to `infinite`. The `heart:before` and `heart:after` selectors do not need any animation properties.
+계속해서 심장이 뛸 수 있도록 `back` 클래스와 `heart` 클래스에 `animation-iteration-count` 속성을 추가하고 값을 `infinite`로 설정하세요. `heart:before` 및 `heart:after` 선택자에는 어떠한 애니메이션 속성도 필요하지 않습니다.
 
 # --hints--
 
-The `animation-iteration-count` property for the `heart` class should have a value of `infinite`.
+`heart` 클래스의 `animation-iteration-count` 속성은 `infinite`여야 합니다.
 
 ```js
 assert($('.heart').css('animation-iteration-count') == 'infinite');
 ```
 
-The `animation-iteration-count` property for the `back` class should have a value of `infinite`.
+`back` 클래스의 `animation-iteration-count` 속성은 `infinite`여야 합니다.
 
 ```js
 assert($('.back').css('animation-iteration-count') == 'infinite');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/make-motion-more-natural-using-a-bezier-curve.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/make-motion-more-natural-using-a-bezier-curve.md
index 85932dd7b3c..ba1f9a3b858 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/make-motion-more-natural-using-a-bezier-curve.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/make-motion-more-natural-using-a-bezier-curve.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a9367417b2b2512aea
-title: Make Motion More Natural Using a Bezier Curve
+title: Bezier Curve를 사용하여 보다 자연스러운 움직임 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c7akWUv'
 forumTopicId: 301063
@@ -9,25 +9,25 @@ dashedName: make-motion-more-natural-using-a-bezier-curve
 
 # --description--
 
-This challenge animates an element to replicate the movement of a ball being juggled. Prior challenges covered the `linear` and `ease-out` cubic Bezier curves, however neither depicts the juggling movement accurately. You need to customize a Bezier curve for this.
+이번 과제는 저글링 중인 공의 움직임을 따라하기 위해 HTML 요소를 애니메이션화합니다. 지난 과제에서는 `linear`와`ease-out` cubic Bezier curves를 다루었지만, 둘 모두 저글링 움직임을 정확하게 묘사하지 못합니다. 이를 위해 Bezier curve을 커스터마이징해야 합니다.
 
-The `animation-timing-function` automatically loops at every keyframe when the `animation-iteration-count` is set to infinite. Since there is a keyframe rule set in the middle of the animation duration (at `50%`), it results in two identical animation progressions at the upward and downward movement of the ball.
+`animation-timing-function`은 `animation-iteration-count`이 무한으로 설정되어 있을 때 모든 키프레임에서 자동적으로 반복됩니다. Animation duration중간에 설정된 키프레임 규칙이 있기 때문에(`50%`에서), 공의 위쪽 이동 및 아래쪽 이동에서 두 개의 동일한 애니메이션이 진행됩니다.
 
-The following cubic Bezier curve simulates a juggling movement:
+다음의 cubic Bezier curve는 저글링 움직임을 시뮬레이션합니다:
 
 ```css
 cubic-bezier(0.3, 0.4, 0.5, 1.6);
 ```
 
-Notice that the value of y2 is larger than 1. Although the cubic Bezier curve is mapped on a 1 by 1 coordinate system, and it can only accept x values from 0 to 1, the y value can be set to numbers larger than one. This results in a bouncing movement that is ideal for simulating the juggling ball.
+y2의 값이 1보다 크다는 것을 주의하세요. Cubic Bezier curve는 좌표계에 1대1로 매핑되며 오직 0에서 1까지의 x값만 허용함에도 불구하고, y값은 1보다 큰 숫자로 설정할 수 있습니다 그 결과로 저글링공을 시뮬레이션하기 이상적으로 튀는 움직임이 나타납니다.
 
 # --instructions--
 
-Change value of the `animation-timing-function` of the element with the id of `green` to a `cubic-bezier` function with x1, y1, x2, y2 values set respectively to 0.311, 0.441, 0.444, 1.649.
+Id가 `green`인 요소의 `animation-timing-function` 값을 x1, y1, x2, y2 값이 각각 0.311, 0.441, 0.444, 1.649인 `cubic-bezier` 함수로 변경합니다.
 
 # --hints--
 
-The value of the `animation-timing-function` property for the element with the id `green` should be a `cubic-bezier` function with x1, y1, x2, y2 values as specified.
+Id가 `green`인 요소의 `animation-timing-function` 속성 값은 지정한 x1, y1, x2, y2 값을 가진 `cubic-bezier` 함수여야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/modify-fill-mode-of-an-animation.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/modify-fill-mode-of-an-animation.md
index ec59324e6d1..17f832cd01e 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/modify-fill-mode-of-an-animation.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/modify-fill-mode-of-an-animation.md
@@ -1,6 +1,6 @@
 ---
 id: 58a7a6ebf9a6318348e2d5aa
-title: Modify Fill Mode of an Animation
+title: 애니메이션의 채우기 모드를 수정하는 방법
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cVJDmcE'
 forumTopicId: 301064
@@ -9,9 +9,9 @@ dashedName: modify-fill-mode-of-an-animation
 
 # --description--
 
-That's great, but it doesn't work right yet. Notice how the animation resets after `500ms` has passed, causing the button to revert back to the original color. You want the button to stay highlighted.
+좋아 보이는군요, 하지만 아직 올바르게 작동하지는 않습니다. `500ms`가 지난 후에 애니메이션이 재설정되어 버튼이 원래 색상으로 되돌아 가는 것을 주목하세요. 버튼이 하이라이트 된 상태로 유지되도록 만들어야 합니다.
 
-This can be done by setting the `animation-fill-mode` property to `forwards`. The `animation-fill-mode` specifies the style applied to an element when the animation has finished. You can set it like so:
+그렇게 하기 위해서는 `animation-fill-mode` 속성을 `forwards`로 설정할 수 있습니다. `animation-fill-mode` 속성은 애니메이션이 완료된 후에 요소에 적용되는 스타일을 지정합니다. 다음과 같이 설정해보세요.
 
 ```css
 animation-fill-mode: forwards;
@@ -19,11 +19,11 @@ animation-fill-mode: forwards;
 
 # --instructions--
 
-Set the `animation-fill-mode` property of `button:hover` to `forwards` so the button stays highlighted when a user hovers over it.
+`button:hover`의 `animation-fill-mode` 속성을 `forwards`로 설정하여 사용자가 해당 버튼 위로 이동할 때 버튼이 강조된 상태를 유지하도록합니다.
 
 # --hints--
 
-`button:hover` should have a `animation-fill-mode` property with a value of `forwards`.
+`button:hover`의 `animation-fill-mode` 속성 값은 `forwards`여야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/move-a-relatively-positioned-element-with-css-offsets.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/move-a-relatively-positioned-element-with-css-offsets.md
index 233713adda4..065a526f151 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/move-a-relatively-positioned-element-with-css-offsets.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/move-a-relatively-positioned-element-with-css-offsets.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781e367417b2b2512aca
-title: Move a Relatively Positioned Element with CSS Offsets
+title: 상대적으로 위치한 요소를 CSS 오프셋으로 옮기기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c9bQEA4'
 forumTopicId: 301065
@@ -9,21 +9,21 @@ dashedName: move-a-relatively-positioned-element-with-css-offsets
 
 # --description--
 
-The CSS offsets of `top` or `bottom`, and `left` or `right` tell the browser how far to offset an item relative to where it would sit in the normal flow of the document. You're offsetting an element away from a given spot, which moves the element away from the referenced side (effectively, the opposite direction). As you saw in the last challenge, using the `top` offset moved the `h2` downwards. Likewise, using a `left` offset moves an item to the right.
+`top` 또는 `bottom`, 그리고 `left` 또는 `right`의 CSS 오프셋은 브라우저에서 문서의 정상적인 흐름일 때의 위치로부터 얼마나 떨어지게 할지 알려줍니다. 지정된 지점에서 요소를 오프셋 하면 요소가 그 지점으로부터 멀어지게 됩니다. (다시 말하자면 반대 방향으로 움직이는 것이죠) 지난 챌린지에서 보았듯이 `top` 오프셋을 사용하면 `h2`가 아래쪽으로 이동합니다. 마찬가지로 `left` 오프셋을 사용하면 항목이 오른쪽으로 이동합니다.
 
 # --instructions--
 
-Use CSS offsets to move the `h2` 15 pixels to the right and 10 pixels up.
+CSS 오프셋을 사용하여 `h2`를 오른쪽으로 15픽셀, 위로 10픽셀 이동하세요.
 
 # --hints--
 
-Your code should use a CSS offset to relatively position the `h2` 10px upwards. In other words, move it 10px away from the `bottom` of where it normally sits.
+코드에서 CSS 오프셋을 사용하여 `h2`를 상대적으로 10px 위로 위치시켜야 합니다. 다시 말해, 원래 위치한 곳의 `bottom`에서 10px 떨어진 곳으로 이동시키세요.
 
 ```js
 assert($('h2').css('bottom') == '10px');
 ```
 
-Your code should use a CSS offset to relatively position the `h2` 15px towards the right. In other words, move it 15px away from the `left` of where it normally sits.
+코드에서 CSS 오프셋을 사용하여 `h2`를 상대적으로 오른쪽으로 15px 떨어진 곳에 배치해야 합니다. 다시 말해, 원래 위치한 곳의 `left`에서 15px 만큼 이동시켜야 합니다.
 
 ```js
 assert($('h2').css('left') == '15px');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/push-elements-left-or-right-with-the-float-property.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/push-elements-left-or-right-with-the-float-property.md
index a57caba304b..5c9294770c7 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/push-elements-left-or-right-with-the-float-property.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/push-elements-left-or-right-with-the-float-property.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a3367417b2b2512ace
-title: Push Elements Left or Right with the float Property
+title: Float 속성을 사용하여 요소를 왼쪽 혹은 오른쪽에 배치하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c2MDqu2'
 forumTopicId: 301066
@@ -9,21 +9,21 @@ dashedName: push-elements-left-or-right-with-the-float-property
 
 # --description--
 
-The next positioning tool does not actually use `position`, but sets the `float` property of an element. Floating elements are removed from the normal flow of a document and pushed to either the `left` or `right` of their containing parent element. It's commonly used with the `width` property to specify how much horizontal space the floated element requires.
+다음 위치 조정 툴은 실제로 `position`을 사용하지는 않지만 요소의 `float` 속성을 설정합니다. 플로팅하는 요소는 document의 일반적인 흐름에서 벗어나 그 요소를 포함하고 있는 부모 엘리먼트의 `left` 혹은 `right`에 배치됩니다. 보통 `width` 속성을 함께 사용하여 플로팅하는 요소에 필요한 수평 공간을 지정합니다.
 
 # --instructions--
 
-The given markup would work well as a two-column layout, with the `section` and `aside` elements next to each other. Give the `#left` item a `float` of `left` and the `#right` item a `float` of `right`.
+주어진 마크업은 `section`과 `aside`가 서로 나란히 옆에 있는 2열 레이아웃으로 잘 작동합니다. `#left` 항목에 `left`의 `float`를 지정하고, `#right` 항목에 `right`의 `float`를 지정하십시오.
 
 # --hints--
 
-The element with id `left` should have a `float` value of `left`.
+아이디(id)가 `left`인 요소의 `float`값은 `left`여야 합니다.
 
 ```js
 assert($('#left').css('float') == 'left');
 ```
 
-The element with id `right` should have a `float` value of `right`.
+아이디(id)가 `right`인 요소의 `float`값은 `right`여야 합니다.
 
 ```js
 assert($('#right').css('float') == 'right');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-font-size-for-multiple-heading-elements.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-font-size-for-multiple-heading-elements.md
index 15fe7ce6dfa..8f7c85f51b5 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-font-size-for-multiple-heading-elements.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-font-size-for-multiple-heading-elements.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781c367417b2b2512ac2
-title: Set the font-size for Multiple Heading Elements
+title: 여러 헤딩 요소들의 폰트 사이즈 설정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cPpQNT3'
 forumTopicId: 301067
@@ -9,59 +9,59 @@ dashedName: set-the-font-size-for-multiple-heading-elements
 
 # --description--
 
-The `font-size` property is used to specify how large the text is in a given element. This rule can be used for multiple elements to create visual consistency of text on a page. In this challenge, you'll set the values for all `h1` through `h6` tags to balance the heading sizes.
+`font-size` 속성은 특정 요소 내에서 텍스트의 크기를 지정하는 데 사용됩니다. 이 규칙은 페이지의 텍스트를 시각적으로 일관되게 만들기 위해 여러 요소에 사용될 수 있습니다. 이 도전에서는 `h1`부터 `h6`까지 모든 태그에 대한 값을 설정하여 헤딩 크기를 균형있게 맞출 것입니다.
 
 # --instructions--
 
-  <p>In the <code>style</code> tags, set the <code>font-size</code> of the:</p>
+  <p><code>style</code> 태그 안에서 다음의 <code>font-size</code>를 설정합니다.</p>
 
   <ul>
-    <li><code>h1</code> tag to 68px.</li>
-    <li><code>h2</code> tag to 52px.</li>
-    <li><code>h3</code> tag to 40px.</li>
-    <li><code>h4</code> tag to 32px.</li>
-    <li><code>h5</code> tag to 21px.</li>
-    <li><code>h6</code> tag to 14px.</li>
+    <li><code>h1</code> 태그는 68px로 설정합니다.</li>
+    <li><code>h2</code> 태그는 52px로 설정합니다.</li>
+    <li><code>h3</code> 태그는 40px로 설정합니다.</li>
+    <li><code>h4</code> 태그는 32px로 설정합니다.</li>
+    <li><code>h5</code> 태그는 21px로 설정합니다.</li>
+    <li><code>h6</code> 태그는 14px로 설정합니다.</li>
   </ul>
 
 # --hints--
 
-Your code should set the `font-size` property for the `h1` tag to 68 pixels.
+코드에서 `h1` 태그의 `font-size` 속성을 68픽셀로 설정해야 합니다.
 
 ```js
  const fontSizeOfh1 = new __helpers.CSSHelp(document).getStyle('h1')?.getPropertyValue('font-size');
  assert(fontSizeOfh1 === '68px');
 ```
 
-Your code should set the `font-size` property for the `h2` tag to 52 pixels.
+코드에서 `h2` 태그의 `font-size` 속성을 52픽셀로 설정해야 합니다.
 
 ```js
  const fontSizeOfh2 = new __helpers.CSSHelp(document).getStyle('h2')?.getPropertyValue('font-size');
  assert(fontSizeOfh2 === '52px');
 ```
 
-Your code should set the `font-size` property for the `h3` tag to 40 pixels.
+코드에서 `h3` 태그의 `font-size` 속성을 40픽셀로 설정해야 합니다.
 
 ```js
  const fontSizeOfh3 = new __helpers.CSSHelp(document).getStyle('h3')?.getPropertyValue('font-size');
  assert(fontSizeOfh3 === '40px');
 ```
 
-Your code should set the `font-size` property for the `h4` tag to 32 pixels.
+코드에서 `h4` 태그의 `font-size` 속성을 32픽셀로 설정해야 합니다.
 
 ```js
  const fontSizeOfh4 = new __helpers.CSSHelp(document).getStyle('h4')?.getPropertyValue('font-size');
  assert(fontSizeOfh4 === '32px');
 ```
 
-Your code should set the `font-size` property for the `h5` tag to 21 pixels.
+코드에서 `h5` 태그의 `font-size` 속성을 21픽셀로 설정해야 합니다.
 
 ```js
  const fontSizeOfh5 = new __helpers.CSSHelp(document).getStyle('h5')?.getPropertyValue('font-size');
  assert(fontSizeOfh5 === '21px');
 ```
 
-Your code should set the `font-size` property for the `h6` tag to 14 pixels.
+코드에서 `h6` 태그의 `font-size` 속성을 14픽셀로 설정해야 합니다.
 
 ```js
  const fontSizeOfh6 = new __helpers.CSSHelp(document).getStyle('h6')?.getPropertyValue('font-size');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-font-size-of-paragraph-text.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-font-size-of-paragraph-text.md
index d50c75f67bb..be10f8d9f80 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-font-size-of-paragraph-text.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-font-size-of-paragraph-text.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781c367417b2b2512ac4
-title: Set the font-size of Paragraph Text
+title: 단락 텍스트의 폰트 크기 설정
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cVJ36Cr'
 forumTopicId: 301068
@@ -9,15 +9,15 @@ dashedName: set-the-font-size-of-paragraph-text
 
 # --description--
 
-The `font-size` property in CSS is not limited to headings, it can be applied to any element containing text.
+CSS에서 `font-size` 속성은 제목 태그로만 제한되지 않으며 텍스트를 포함하는 모든 요소에 적용할 수 있습니다.
 
 # --instructions--
 
-Change the value of the `font-size` property for the paragraph to 16px to make it more visible.
+단락태그를 보다 잘 보이게 하기 위해 `font-size` 속성의 값을 16px로 수정합니다.
 
 # --hints--
 
-Your `p` tag should have a `font-size` of 16 pixels.
+`p`태그는 16px의 `font-size`가 있어야 합니다.
 
 ```js
 assert($('p').css('font-size') == '16px');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-font-weight-for-multiple-heading-elements.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-font-weight-for-multiple-heading-elements.md
index aec407d16e1..65856245e10 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-font-weight-for-multiple-heading-elements.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-font-weight-for-multiple-heading-elements.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781c367417b2b2512ac3
-title: Set the font-weight for Multiple Heading Elements
+title: 여러 헤딩 요소들의 폰트 사이즈를 설정합니다.
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/crVWRHq'
 forumTopicId: 301069
@@ -9,47 +9,47 @@ dashedName: set-the-font-weight-for-multiple-heading-elements
 
 # --description--
 
-You set the `font-size` of each heading tag in the last challenge, here you'll adjust the `font-weight`.
+지난 과제에서 각각의 제목 태그의 `font-size`를 설정했습니다. 여기에서는 `font-weight`를 조정합니다.
 
-The `font-weight` property sets how thick or thin characters are in a section of text.
+`font-weight` 속성은 텍스트 영역에서 문자의 굵기를 설정합니다.
 
 # --instructions--
 
-<ul><li>Set the <code>font-weight</code> of the <code>h1</code> tag to 800.</li><li>Set the <code>font-weight</code> of the <code>h2</code> tag to 600.</li><li>Set the <code>font-weight</code> of the <code>h3</code> tag to 500.</li><li>Set the <code>font-weight</code> of the <code>h4</code> tag to 400.</li><li>Set the <code>font-weight</code> of the <code>h5</code> tag to 300.</li><li>Set the <code>font-weight</code> of the <code>h6</code> tag to 200.</li></ul>
+<ul><li><code>h1</code>태그의 <code>font-weight</code>를 800으로 설정합니다.</li><li><code>h2</code>태그의 <code>font-weight</code>를 600으로 설정합니다.</li><li><code>h3</code>태그의 <code>font-weight</code>를 500으로 설정합니다.</li><li><code>h4</code>태그의 <code>font-weight</code>를 400으로 설정합니다.</li><li><code>h5</code>태그의 <code>font-weight</code>를 300으로 설정합니다.</li><li><code>h6</code>태그의 <code>font-weight</code>를 200으로 설정합니다.</li></ul>
 
 # --hints--
 
-Your code should set the `font-weight` property for the `h1` tag to 800.
+당신의 코드는 `h1` 태그의 `font-weight` 속성을 800으로 설정해야 합니다.
 
 ```js
 assert($('h1').css('font-weight') == '800');
 ```
 
-Your code should set the `font-weight` property for the `h2` tag to 600.
+당신의 코드는 `h2` 태그의 `font-weight` 속성을 600으로 설정해야 합니다.
 
 ```js
 assert($('h2').css('font-weight') == '600');
 ```
 
-Your code should set the `font-weight` property for the `h3` tag to 500.
+당신의 코드는 `h3` 태그의 `font-weight` 속성을 500으로 설정해야 합니다.
 
 ```js
 assert($('h3').css('font-weight') == '500');
 ```
 
-Your code should set the `font-weight` property for the `h4` tag to 400.
+당신의 코드는 `h4` 태그의 `font-weight` 속성을 400으로 설정해야 합니다.
 
 ```js
 assert($('h4').css('font-weight') == '400');
 ```
 
-Your code should set the `font-weight` property for the `h5` tag to 300.
+당신의 코드는 `h5` 태그의 `font-weight` 속성을 300으로 설정해야 합니다.
 
 ```js
 assert($('h5').css('font-weight') == '300');
 ```
 
-Your code should set the `font-weight` property for the `h6` tag to 200.
+당신의 코드는 `h6` 태그의 `font-weight` 속성을 200으로 설정해야 합니다.
 
 ```js
 assert($('h6').css('font-weight') == '200');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-line-height-of-paragraphs.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-line-height-of-paragraphs.md
index 950e5d4c775..5dba10ae60c 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-line-height-of-paragraphs.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/set-the-line-height-of-paragraphs.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781d367417b2b2512ac5
-title: Set the line-height of Paragraphs
+title: 단락의 line-height 설정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/crVWdcv'
 forumTopicId: 301070
@@ -9,15 +9,15 @@ dashedName: set-the-line-height-of-paragraphs
 
 # --description--
 
-CSS offers the `line-height` property to change the height of each line in a block of text. As the name suggests, it changes the amount of vertical space that each line of text gets.
+CSS의 `line-height` 속성은 텍스트 블록에서 각 줄 높이를 변경할 때 사용합니다. 이름에서 알 수 있듯이 이 속성은 각 텍스트 줄이 차지하는 수직 공간의 크기를 변경합니다.
 
 # --instructions--
 
-Add a `line-height` property to the `p` tag and set it to 25px.
+`p` 태그에 `line-height` 속성을 추가하고 값을 25px로 설정하십시오.
 
 # --hints--
 
-Your code should set the `line-height` of the `p` tag to 25 pixels.
+코드에서 `p` 태그의 `line-height` 값을 25 픽셀로 설정해야 합니다.
 
 ```js
 assert($('p').css('line-height') == '25px');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-a-bezier-curve-to-move-a-graphic.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-a-bezier-curve-to-move-a-graphic.md
index f4907e34b6b..cd529017d62 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-a-bezier-curve-to-move-a-graphic.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-a-bezier-curve-to-move-a-graphic.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a9367417b2b2512ae9
-title: Use a Bezier Curve to Move a Graphic
+title: Bezier Curve를 사용하여 그래픽 이동하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c6bnRCK'
 forumTopicId: 301071
@@ -9,23 +9,23 @@ dashedName: use-a-bezier-curve-to-move-a-graphic
 
 # --description--
 
-A previous challenge discussed the `ease-out` keyword that describes an animation change that speeds up first and then slows down at the end of the animation. On the right, the difference between the `ease-out` keyword (for the blue element) and `linear` keyword (for the red element) is demonstrated. Similar animation progressions to the `ease-out` keyword can be achieved by using a custom cubic Bezier curve function.
+지난 과제에서 처음에는 속도를 내다가 마지막에 느려지는 애니메이션을 그리는 `ease-out` 키워드에 대해 다루었습니다. 우측에는 `ease-out`키워드(파란색 요소의 경우) 와 `linear`키워드(빨간색 요소의 경우) 의 차이가 시연되고 있습니다. 커스텀 cubic Bezier curve 함수를 사용하여 `ease-out`키워드와 비슷한 애니메이션을 만들 수 있습니다.
 
-In general, changing the `p1` and `p2` anchor points drives the creation of different Bezier curves, which controls how the animation progresses through time. Here's an example of a Bezier curve using values to mimic the `ease-out` style:
+일반적으로, `p1`과 `p2` 고정점의 변화는 시간 동안 애니메이션의 진행을 제어하는 다양한 Bezier curve를 만들어 냅니다. 다음은 `ease-out`스타일을 따라하기 위한 값을 사용하는 Bezier curve 예제입니다:
 
 ```css
 animation-timing-function: cubic-bezier(0, 0, 0.58, 1);
 ```
 
-Remember that all `cubic-bezier` functions start with `p0` at (0, 0) and end with `p3` at (1, 1). In this example, the curve moves faster through the Y-axis (starts at 0, goes to `p1` y value of 0, then goes to `p2` y value of 1) than it moves through the X-axis (0 to start, then 0 for `p1`, up to 0.58 for `p2`). As a result, the change in the animated element progresses faster than the time of the animation for that segment. Towards the end of the curve, the relationship between the change in x and y values reverses - the y value moves from 1 to 1 (no change), and the x values move from 0.58 to 1, making the animation changes progress slower compared to the animation duration.
+모든 `cubic-bezier`함수는 (0,0) 에서 `p0`로 시작하고 (1,1) 에서 `p3`로 끝난다는 것을 기억해주세요. 이 예제에서, 곡선이 X축을 통해서 이동(0에서 시작하며 `p1` 에서는 0, `p2` 에서는 최대 0.58지점까지 이동) 하는 것보다 Y축을 통해 이동하는 것이 더 빠릅니다(0에서 시작하여 `p1`의 y 값 0으로 이동한 다음 `p2`의 y 값 1로 이동). 결과적으로, 애니메이션되는 요소의 변화는 해당 세그먼트의 애니메이션 시간보다 더 빠르게 진행됩니다. 곡선의 끝으로 갈수록, x와 y값의 변화 사이의 관계가 반전됩니다 - y값은 1에서 1로 이동하고(변화 없음), x값은 0.58에서 1로 이동하며, 애니메이션 지속 시간과 비교하여 애니메이션 변화가 더 느리게 진행됩니다.
 
 # --instructions--
 
-To see the effect of this Bezier curve in action, change the `animation-timing-function` of the element with id of `red` to a `cubic-bezier` function with x1, y1, x2, y2 set respectively to `0, 0, 0.58, 1` as the values. This will make both elements progress through the animation similarly.
+Bezier curve가 동작하는 결과를 보려면, id가 `red`인 요소의 `animation-timing-function`을 x1, y1, x2, y2의 값이 각각 `0, 0, 0.58, 1`인 `cubic-bezier`함수로 변경하세요. 이것은 두 요소의 애니메이션이 유사하게 진행되도록 만듭니다
 
 # --hints--
 
-The value of the `animation-timing-function` property of the element with the id `red` should be a `cubic-bezier` function with x1, y1, x2, y2 values set respectively to 0, 0, 0.58, 1 .
+Id가 `red`인 요소의 `animation-timing-function`속성 값은 x1, y1, x2, y2값이 각각 0, 0, 0.58, 1인`cubic-bezier`함수가 되어야 합니다.
 
 ```js
 assert(
@@ -33,13 +33,13 @@ assert(
 );
 ```
 
-The element with the id `red` should no longer have the `animation-timing-function` property of `linear`.
+Id가 `red`인 요소는 `animation-timing-function`속성이 더이상 `linear`를 가지지 않아야 합니다.
 
 ```js
 assert($('#red').css('animation-timing-function') !== 'linear');
 ```
 
-The value of the `animation-timing-function` property for the element with the id `blue` should not change.
+Id가 `blue`인 요소의 `animation-timing-function` 속성 값은 변경되지 않아야 합니다.
 
 ```js
 const blueBallAnimation = __helpers.removeWhiteSpace(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-a-css-linear-gradient-to-create-a-striped-element.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-a-css-linear-gradient-to-create-a-striped-element.md
index f2c9c9efef7..9e3f6350ba6 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-a-css-linear-gradient-to-create-a-striped-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-a-css-linear-gradient-to-create-a-striped-element.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a5367417b2b2512ad7
-title: Use a CSS Linear Gradient to Create a Striped Element
+title: CSS 선형 그라데이션을 사용하여 줄무늬 요소 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c6bmQh2'
 forumTopicId: 301072
@@ -9,57 +9,57 @@ dashedName: use-a-css-linear-gradient-to-create-a-striped-element
 
 # --description--
 
-The `repeating-linear-gradient()` function is very similar to `linear-gradient()` with the major difference that it repeats the specified gradient pattern. `repeating-linear-gradient()` accepts a variety of values, but for simplicity, you'll work with an angle value and color stop values in this challenge.
+`repeating-linear-gradient()` 함수는 `linear-gradient()`과 매우 유사하지만 주요 차이점은 지정된 특정한 그라데이션 패턴을 반복한다는 것입니다. `repeating-linear-gradient()`는 다양한 값들을 허용하지만 이번 과제에서는 간단히 각도 값과 색상 정지 값들을 사용할 것입니다.
 
-The angle value is the direction of the gradient. Color stops are like width values that mark where a transition takes place, and are given with a percentage or a number of pixels.
+각도 값은 그라디언트의 방향을 나타냅니다. 색상 정지점는 전환이 발생하는 위치를 나타내며, 백분율이나 픽셀 수로 지정됩니다.
 
-In the example demonstrated in the code editor, the gradient starts with the color `yellow` at 0 pixels which blends into the second color `blue` at 40 pixels away from the start. Since the next color stop is also at 40 pixels, the gradient immediately changes to the third color `green`, which itself blends into the fourth color value `red` as that is 80 pixels away from the beginning of the gradient.
+코드 편집기에서 보여지는 예제에서 그라데이션은 0 픽셀에서 시작하는 색상 `yellow`로 시작되어 시작점에서 40 픽셀 떨어진 곳에서 두 번째 색상 `blue`로 혼합됩니다. 다음 색상 정지점도 40 픽셀에 있기 때문에 그라데이션은 즉시 세 번째 색상 `green`으로 전환되며, 그 자체가 그라데이션 시작점에서 80 픽셀 떨어진 곳에서 네 번째 색상 값 `red`로 혼합됩니다.
 
-For this example, it helps to think about the color stops as pairs where every two colors blend together.
+이번 예시에서는 색상 정지점을 각각 다른 두 개의 색상이 서로 혼합되는 지점으로 생각하는 것이 도움이 됩니다.
 
 ```css
 0px [yellow -- blend -- blue] 40px [green -- blend -- red] 80px
 ```
 
-If every two color stop values are the same color, the blending isn't noticeable because it's between the same color, followed by a hard transition to the next color, so you end up with stripes.
+모든 두 색상 정지 값이 동일한 색상인 경우 혼합이 눈에 띄지 않습니다. 왜냐하면 동일한 색상 간의 혼합이며 다음 색상으로의 강한 전환이 이어지기 때문에 줄무늬가 생성됩니다.
 
 # --instructions--
 
-Make stripes by changing the `repeating-linear-gradient()` to use a gradient angle of `45deg`, then set the first two color stops to `yellow`, and finally the second two color stops to `black`.
+줄무늬를 만들려면 `repeating-linear-gradient()`를 `45deg`의 각도를 사용하도록 변경한 다음 첫 번째 두 색상 정지점을 `yellow`로 설정하고 마지막으로 두 번째 두 색상 정지를 `black`으로 설정하세요.
 
 # --hints--
 
-The angle of the `repeating-linear-gradient()` should be 45deg.
+`repeating-linear-gradient()`의 각도는 45도여야 합니다.
 
 ```js
 assert(code.match(/background:\s*?repeating-linear-gradient\(\s*?45deg/gi));
 ```
 
-The angle of the `repeating-linear-gradient()` should no longer be 90deg
+`repeating-linear-gradient()`의 각도는 더이상 90도여선 안됩니다.
 
 ```js
 assert(!code.match(/90deg/gi));
 ```
 
-The color stop at 0 pixels should be `yellow`.
+0픽셀 부분의 색상 정지점은 `yellow`여야 합니다.
 
 ```js
 assert(code.match(/yellow\s+?0(px)?/gi));
 ```
 
-The first color stop at 40 pixels should be `yellow`.
+40픽셀 부분의 첫번째 색상 정지점은 `yellow`여야 합니다.
 
 ```js
 assert(code.match(/yellow\s+?40px/gi));
 ```
 
-The second color stop at 40 pixels should be `black`.
+40픽셀 부분의 두번째 색상 정지점은 `black`여야 합니다.
 
 ```js
 assert(code.match(/yellow\s+?40px,\s*?black\s+?40px/gi));
 ```
 
-The last color stop at 80 pixels should be `black`.
+80픽셀 부분의 마지막 색상 정지점은 `black`여야 합니다.
 
 ```js
 assert(code.match(/black\s+?80px/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-css-animation-to-change-the-hover-state-of-a-button.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-css-animation-to-change-the-hover-state-of-a-button.md
index f26d2585dd7..5ab283a3166 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-css-animation-to-change-the-hover-state-of-a-button.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-css-animation-to-change-the-hover-state-of-a-button.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a7367417b2b2512ae0
-title: Use CSS Animation to Change the Hover State of a Button
+title: CSS 애니메이션을 사용하여 버튼의 호버 상태 변경하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cg4vZAa'
 forumTopicId: 301073
@@ -9,9 +9,9 @@ dashedName: use-css-animation-to-change-the-hover-state-of-a-button
 
 # --description--
 
-You can use CSS `@keyframes` to change the color of a button in its hover state.
+CSS의 `@keyframes`를 사용하여 마우스 호버(hover) 시 버튼의 색상을 변경할 수 있습니다.
 
-Here's an example of changing the width of an image on hover:
+다음은 마우스를 호버했을 때 이미지의 너비를 변경하는 예제입니다.
 
 ```html
 <style>
@@ -35,19 +35,19 @@ Here's an example of changing the width of an image on hover:
 
 # --instructions--
 
-Note that `ms` stands for milliseconds, where 1000ms is equal to 1s.
+`ms`는 밀리초를 뜻하며 1000밀리초(1000ms)는 1초(1s)입니다.
 
-Use CSS `@keyframes` to change the `background-color` of the `button` element so it becomes `#4791d0` when a user hovers over it. The `@keyframes` rule should only have an entry for `100%`.
+CSS의 `@keyframes`를 사용하여 유저가 마우스를 호버했을 때 `button` 요소의 `background-color`가 `#4791d0` 색이 되도록 변경하십시오. `@keyframes` 규칙에는 `100%`항목만 있어야 합니다.
 
 # --hints--
 
-The @keyframes rule should use the `animation-name` background-color.
+@keyframes 규칙에서 `animation-name`은 background-color가 되어야 합니다.
 
 ```js
 assert(code.match(/@keyframes\s+?background-color\s*?{/g));
 ```
 
-There should be one rule under `@keyframes` that changes the `background-color` to `#4791d0` at 100%.
+`@keyframes`에는 100%일 때 `background-color`를 `#4791d0`색으로 변경하는 규칙이 하나여야 합니다.
 
 ```js
 assert(code.match(/100%\s*?{\s*?background-color:\s*?#4791d0;\s*?}/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewx-to-skew-an-element-along-the-x-axis.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewx-to-skew-an-element-along-the-x-axis.md
index f474134e450..b21c31478d5 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewx-to-skew-an-element-along-the-x-axis.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewx-to-skew-an-element-along-the-x-axis.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a6367417b2b2512adb
-title: Use the CSS Transform Property skewX to Skew an Element Along the X-Axis
+title: CSS Transform 속성의 skewX를 사용하여 요소를 X축을 따라 기울이기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cyLP8Sr'
 forumTopicId: 301074
@@ -9,9 +9,9 @@ dashedName: use-the-css-transform-property-skewx-to-skew-an-element-along-the-x-
 
 # --description--
 
-The next function of the `transform` property is `skewX()`, which skews the selected element along its X (horizontal) axis by a given degree.
+`transform` 속성의 다음 기능은 `skewX()`로, 선택한 요소를 X (수평) 축을 기준으로 주어진 각도만큼 기울입니다.
 
-The following code skews the paragraph element by -32 degrees along the X-axis.
+아래의 코드는 문단 요소를 X축을 기준으로 -32도를 기울입니다.
 
 ```css
 p {
@@ -21,11 +21,11 @@ p {
 
 # --instructions--
 
-Skew the element with the id of `bottom` by 24 degrees along the X-axis by using the `transform` property.
+`transform` 속성을 사용하여 id가 `bottom`인 요소를 X축을 기준으로 24도 기울여보세요.
 
 # --hints--
 
-The element with id `bottom` should be skewed by 24 degrees along its X-axis.
+id가 `bottom`인 요소는 X축을 따라 24도를 비틀어야 합니다.
 
 ```js
 assert(code.match(/#bottom\s*?{\s*?.*?\s*?transform:\s*?skewX\(24deg\);/g));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewy-to-skew-an-element-along-the-y-axis.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewy-to-skew-an-element-along-the-y-axis.md
index 2874000540a..666597ac1ec 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewy-to-skew-an-element-along-the-y-axis.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-property-skewy-to-skew-an-element-along-the-y-axis.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a6367417b2b2512adc
-title: Use the CSS Transform Property skewY to Skew an Element Along the Y-Axis
+title: CSS 변형 속성인 SkewY를 사용하여 요소를 Y축을 따라 기울이는 방법
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c2MZ2uB'
 forumTopicId: 301075
@@ -9,15 +9,15 @@ dashedName: use-the-css-transform-property-skewy-to-skew-an-element-along-the-y-
 
 # --description--
 
-Given that the `skewX()` function skews the selected element along the X-axis by a given degree, it is no surprise that the `skewY()` property skews an element along the Y (vertical) axis.
+선택한 요소를 주어진 각도로 X축을 따라 기울이는 `skewX()` 함수가 있다면, `skewY()` 속성은 요소를 Y (수직) 축을 따라 기울이게 됩니다.
 
 # --instructions--
 
-Skew the element with the id of `top` -10 degrees along the Y-axis by using the `transform` property.
+`transform` 속성을 사용하여 `top` id를 가진 요소를 Y축을 따라 -10도만큼 기울이세요.
 
 # --hints--
 
-The element with id `top` should be skewed by -10 degrees along its Y-axis.
+`top` id를 가진 요소는 Y축을 따라 -10도만큼 기울어야 합니다.
 
 ```js
 assert(code.match(/#top\s*?{\s*?.*?\s*?transform:\s*?skewY\(-10deg\);/g));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-change-the-size-of-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-change-the-size-of-an-element.md
index 6c30fe6ee78..1da48436c05 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-change-the-size-of-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-change-the-size-of-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a5367417b2b2512ad9
-title: Use the CSS Transform scale Property to Change the Size of an Element
+title: CSS의 Transform scale 속성을 사용하여 요소의 크기 변경하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c2MZVSg'
 forumTopicId: 301076
@@ -9,7 +9,7 @@ dashedName: use-the-css-transform-scale-property-to-change-the-size-of-an-elemen
 
 # --description--
 
-To change the scale of an element, CSS has the `transform` property, along with its `scale()` function. The following code example doubles the size of all the paragraph elements on the page:
+CSS에서는 `transform` 속성과 `scale()` 함수를 함께 사용하여 요소의 크기를 변경합니다. 다음은 페이지의 모든 단락(paragraph) 요소 사이즈를 두 배로 늘리는 코드 예제입니다.
 
 ```css
 p {
@@ -19,11 +19,11 @@ p {
 
 # --instructions--
 
-Increase the size of the element with the id of `ball2` to 1.5 times its original size.
+아이디(id) `ball2`의 크기를 원래 크기의 1.5배로 늘리십시오.
 
 # --hints--
 
-The `transform` property for `#ball2` should be set to scale it to 1.5 times its size.
+`#ball2`의 `transform` 속성은 크기를 1.5배로 조정하도록 설정해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-scale-an-element-on-hover.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-scale-an-element-on-hover.md
index 2c55192985f..7fe7bd03e6b 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-scale-an-element-on-hover.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-scale-an-element-on-hover.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78a5367417b2b2512ada
-title: Use the CSS Transform scale Property to Scale an Element on Hover
+title: CSS transform scale 속성을 사용하여 요소를 호버 시 확대하는 방법
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cyLPJuM'
 forumTopicId: 301077
@@ -9,9 +9,9 @@ dashedName: use-the-css-transform-scale-property-to-scale-an-element-on-hover
 
 # --description--
 
-The `transform` property has a variety of functions that let you scale, move, rotate, skew, etc., your elements. When used with pseudo-classes such as `:hover` that specify a certain state of an element, the `transform` property can easily add interactivity to your elements.
+`transform` 속성에는 요소를 확대, 이동, 회전, 비틀기 등 다양한 기능을 적용할 수 있는 함수들이 있습니다. `:hover`와 같은 가상 클래스와 함께 사용될 때, `transform` 속성은 요소에 쉽게 상호 작용을 추가할 수 있습니다.
 
-Here's an example to scale the paragraph elements to 2.1 times their original size when a user hovers over them:
+다음은 사용자가 그 위에 마우스를 올리면 문단 요소를 원래 크기의 2.1배로 확대하는 예제입니다.
 
 ```css
 p:hover {
@@ -19,15 +19,15 @@ p:hover {
 }
 ```
 
-**Note:** Applying a transform to a `div` element will also affect any child elements contained in the div.
+**참고:** `div` 요소에 변형을 적용하면 div에 포함된 모든 하위 요소에도 영향을 미칩니다.
 
 # --instructions--
 
-Add a CSS rule for the `hover` state of the `div` and use the `transform` property to scale the `div` element to 1.1 times its original size when a user hovers over it.
+`div`의 `hover` 상태에 대한 CSS 규칙을 추가하고 사용자가 호버할 때 `div` 요소의 크기를 원래 크기의 1.1배로 확대하는 `transform` 속성을 사용하세요.
 
 # --hints--
 
-The size of the `div` element should scale 1.1 times when the user hovers over it.
+사용자가 호버할 때 `div` 요소의 크기는 1.1배로 확대되어야 합니다.
 
 ```js
 assert(code.match(/div:hover\s*?{\s*?transform:\s*?scale\(1\.1\);/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-em-tag-to-italicize-text.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-em-tag-to-italicize-text.md
index cccc37ef210..0a5be6668b7 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-em-tag-to-italicize-text.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-em-tag-to-italicize-text.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781a367417b2b2512ab9
-title: Use the em Tag to Italicize Text
+title: em 태그를 사용해서 이탤릭체 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cVJRBtp'
 forumTopicId: 301078
@@ -9,21 +9,21 @@ dashedName: use-the-em-tag-to-italicize-text
 
 # --description--
 
-To emphasize text, you can use the `em` tag. This displays text as italicized, as the browser applies the CSS of `font-style: italic;` to the element.
+텍스트를 강조하기 위해서 `em`태그를 사용할 수 있습니다. 이렇게 하면 브라우저에서 `font-style: italic;`인 CSS를 요소에 적용하기 때문에 텍스트가 이탤릭체로 표시됩니다.
 
 # --instructions--
 
-Wrap an `em` tag around the contents of the paragraph tag to give it emphasis.
+문단 컨텐츠 주위를 `em`태그로 감싸서 컨텐츠를 강조하세요.
 
 # --hints--
 
-Your code should add an `em` tag to the markup.
+코드로 마크업에 `em`태그를 추가해야 합니다.
 
 ```js
 assert($('em').length == 1);
 ```
 
-The `em` tag should wrap around the contents of the `p` tag but not the `p` tag itself.
+`em` 태그는 `p` 태그 안의 컨텐츠를 감싸야 합니다. 하지만 `p` 태그 자체를 감싸서는 안됩니다.
 
 ```js
 assert($('p').children().length == 1 && $('em').children().length == 2);
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-s-tag-to-strikethrough-text.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-s-tag-to-strikethrough-text.md
index 3f8e0378ea4..423a8252e50 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-s-tag-to-strikethrough-text.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-s-tag-to-strikethrough-text.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781b367417b2b2512aba
-title: Use the s Tag to Strikethrough Text
+title: s 태그로 취소선이 적용된 텍스트 만들기
 challengeType: 0
 videoUrl: ''
 forumTopicId: 301079
@@ -9,21 +9,21 @@ dashedName: use-the-s-tag-to-strikethrough-text
 
 # --description--
 
-To strikethrough text, which is when a horizontal line cuts across the characters, you can use the `s` tag. It shows that a section of text is no longer valid. With the `s` tag, the browser applies the CSS of `text-decoration: line-through;` to the element.
+가로선이 문자열의 중앙을 자르는 취소선 텍스트를 만드려면, `s` 태그를 사용하면 됩니다. 취소선은 텍스트 섹션이 더 이상 유효하지 않음을 나타냅니다. `s` 태그를 사용하면, 브라우저는 엘리먼트에 `text-decoration: line-through;` CSS를 적용합니다.
 
 # --instructions--
 
-Wrap the `s` tag around `Google` inside the `h4` tag and then add the word `Alphabet` beside it without the strikethrough formatting.
+`h4` 태그 내부에 있는 `Google` 텍스트를 `s`태그로 감싼 뒤, 취소선 형태가 아닌 `Alphabet` 단어를 옆에 추가해 보세요.
 
 # --hints--
 
-Your code should add one `s` tag to the markup.
+당신의 코드는 마크업에 `s` 태그를 하나 추가해야 합니다.
 
 ```js
 assert($('s').length == 1);
 ```
 
-A `s` tag should wrap around the `Google` text in the `h4` tag. It should not contain the word `Alphabet`.
+`s` 태그는 `h4`태그 안에서 `Google` 텍스트를 감싸야 합니다. 이것은 `Alphabet`단어를 포함하지 않아야 합니다.
 
 ```js
 assert(
@@ -36,7 +36,7 @@ assert(
 );
 ```
 
-You should include the word `Alphabet` in the `h4` tag, without strikethrough formatting.
+`Alphabet` 단어를 `h4`태그 내부에 취소선없이 포함하여야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-strong-tag-to-make-text-bold.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-strong-tag-to-make-text-bold.md
index 74301e504ec..b6952002f6c 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-strong-tag-to-make-text-bold.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-strong-tag-to-make-text-bold.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781a367417b2b2512ab7
-title: Use the strong Tag to Make Text Bold
+title: Strong 태그로 굵은 텍스트 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/ceJNBSb'
 forumTopicId: 301080
@@ -9,27 +9,27 @@ dashedName: use-the-strong-tag-to-make-text-bold
 
 # --description--
 
-To make text bold, you can use the `strong` tag. This is often used to draw attention to text and symbolize that it is important. With the `strong` tag, the browser applies the CSS of `font-weight: bold;` to the element.
+텍스트를 굵게 만들기 위해, `strong`태그를 사용할 수 있습니다 이것은 텍스트에 이목을 끌고 텍스트가 중요하다는 것을 강조하기 위해 종종 쓰입니다. `strong` 태그를 사용하면, 브라우저는 요소에 `font-weight: bold;` CSS를 적용합니다.
 
 # --instructions--
 
-Wrap a `strong` tag around the text `Stanford University` inside the `p` tag (do not include the period).
+`p` 태그 내부에 있는 `Stanford University` 텍스트를 `strong`태그로 감싸보세요(마침표는 포함하지 마세요).
 
 # --hints--
 
-Your code should add one `strong` tag to the markup.
+코드에서 마크업에 `strong` 태그를 하나 추가해야 합니다.
 
 ```js
 assert($('strong').length == 1);
 ```
 
-The `strong` tag should be inside the `p` tag.
+`strong` 태그는 `p` 태그 내부에 위치해야 합니다.
 
 ```js
 assert($('p').children('strong').length == 1);
 ```
 
-The `strong` tag should wrap around the words `Stanford University`.
+`strong` 태그는 `Stanford University`라는 단어를 감싸야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-text-transform-property-to-make-text-uppercase.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-text-transform-property-to-make-text-uppercase.md
index 2cd3670b7ca..1d218bf0595 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-text-transform-property-to-make-text-uppercase.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-text-transform-property-to-make-text-uppercase.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781c367417b2b2512ac0
-title: Use the text-transform Property to Make Text Uppercase
+title: 글자를 대문자로 만들기 위한 text-transform 속성 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cvVZQSP'
 forumTopicId: 301081
@@ -9,25 +9,25 @@ dashedName: use-the-text-transform-property-to-make-text-uppercase
 
 # --description--
 
-The `text-transform` property in CSS is used to change the appearance of text. It's a convenient way to make sure text on a webpage appears consistently, without having to change the text content of the actual HTML elements.
+CSS에서 `text-transform` 속성은 글자의 생김새를 변형시킵니다. 실제 HTML 요소의 글자 내용을 변형할 필요 없이 웹페이지에 있는 글자가 일관되게 나타나도록 만들어주는 간편한 방법입니다.
 
-The following table shows how the different `text-transform`values change the example text "Transform me".
+다음 표는 각기 다른 `text-transform` 값들이 어떻게 예시 글자인 "Transform me"를 변형시키는지를 보여줍니다.
 
-<table><thead><tr><th>Value</th><th>Result</th></tr></thead><tbody><tr><td><code>lowercase</code></td><td>"transform me"</td></tr><tr><td><code>uppercase</code></td><td>"TRANSFORM ME"</td></tr><tr><td><code>capitalize</code></td><td>"Transform Me"</td></tr><tr><td><code>initial</code></td><td>Use the default value</td></tr><tr><td><code>inherit</code></td><td>Use the <code>text-transform</code> value from the parent element</td></tr><tr><td><code>none</code></td><td><strong>Default:</strong> Use the original text</td></tr></tbody></table>
+<table><thead><tr><th>값</th><th>결과</th></tr></thead><tbody><tr><td><code>lowercase</code></td><td>"transform me"</td></tr><tr><td><code>uppercase</code></td><td>"TRANSFORM ME"</td></tr><tr><td><code>capitalize</code></td><td>"Transform Me"</td></tr><tr><td><code>initial</code></td><td>기본값을 사용</td></tr><tr><td><code>inherit</code></td><td>부모 요소의 <code>text-transform</code> 값 사용</td></tr><tr><td><code>none</code></td><td><strong>디폴트:</strong> 원래 글자 사용</td></tr></tbody></table>
 
 # --instructions--
 
-Transform the text of the `h4` to be uppercase using the `text-transform` property.
+`text-transform` 속성을 사용하여 `h4` 글자를 대문자로 만드세요.
 
 # --hints--
 
-The `h4` text should be `uppercase`.
+`h4` 글자는 `uppercase`이어야 합니다.
 
 ```js
 assert($('h4').css('text-transform') === 'uppercase');
 ```
 
-The original text of the h4 should not be changed.
+h4의 원래 글자는 변형되지 않아야 합니다.
 
 ```js
 assert($('h4').text() !== $('h4').text().toUpperCase());
diff --git a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-u-tag-to-underline-text.md b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-u-tag-to-underline-text.md
index a0444987da6..5673bb181ad 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-u-tag-to-underline-text.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/applied-visual-design/use-the-u-tag-to-underline-text.md
@@ -1,6 +1,6 @@
 ---
 id: 587d781a367417b2b2512ab8
-title: Use the u Tag to Underline Text
+title: u태그로 밑줄 텍스트 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cN6aQCL'
 forumTopicId: 301082
@@ -9,23 +9,23 @@ dashedName: use-the-u-tag-to-underline-text
 
 # --description--
 
-To underline text, you can use the `u` tag. This is often used to signify that a section of text is important, or something to remember. With the `u` tag, the browser applies the CSS of `text-decoration: underline;` to the element.
+밑줄 텍스트를 만들기 위해서, `u` 태그를 사용할 수 있습니다. 이것은 종종 텍스트의 어느 한 부분이 중요하거나 기억할만 하다는 것을 의미할 때 사용됩니다. `u` 태그를 사용하면, 브라우저는 요소에 `text-decoration: underline;` CSS를 적용합니다.
 
 # --instructions--
 
-Wrap the `u` tag only around the text `Ph.D. students`.
+`u` 태그로 `Ph.D. students` 텍스트만 감싸보세요.
 
-**Note:** Try to avoid using the `u` tag when it could be confused for a link. Anchor tags also have a default underlined formatting.
+**Note:** 링크로 착각될 수 있는 경우에는 `u`태그를 사용하는 것을 삼가하세요. Anchor 태그 또한 기본 밑줄 형태를 가집니다.
 
 # --hints--
 
-Your code should add a `u` tag to the markup.
+당신의 코드는 마크업에 `u` 태그를 추가해야 합니다.
 
 ```js
 assert($('u').length === 1);
 ```
 
-The `u` tag should wrap around the text `Ph.D. students`.
+`u` 태그는 `Ph.D. students`라는 텍스트를 감싸야 합니다.
 
 ```js
 assert($('u').text() === 'Ph.D. students');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-a-negative-margin-to-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-a-negative-margin-to-an-element.md
index 200db3a4434..53db431bcd9 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-a-negative-margin-to-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-a-negative-margin-to-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08823
-title: Add a Negative Margin to an Element
+title: 요소에 음수 마진 (negative margin) 적용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cnpyGs3'
 forumTopicId: 16166
@@ -9,19 +9,19 @@ dashedName: add-a-negative-margin-to-an-element
 
 # --description--
 
-An element's `margin` controls the amount of space between an element's `border` and surrounding elements.
+요소의 `margin`은 요소의 `border`와 주위 요소 사이의 공간을 설정합니다.
 
-If you set an element's `margin` to a negative value, the element will grow larger.
+요소의 `margin`를 음수 값으로 설정하면, 해당 요소의 크기가 커집니다.
 
 # --instructions--
 
-Try to set the `margin` to a negative value like the one for the red box.
+빨간 상자처럼 `margin`을 음수 값으로 설정해 보십시오.
 
-Change the `margin` of the blue box to `-15px`, so it fills the entire horizontal width of the yellow box around it.
+파란 상자의 `margin`을 `-15px`로 바꿔 주위 노란 상자의 전체 수평 너비를 채우도록 하십시오.
 
 # --hints--
 
-Your `blue-box` class should give elements `-15px` of `margin`.
+`blue-box` 클래스가 요소에 `-15px`의 `margin`을 부여해야 합니다.
 
 ```js
 assert($('.blue-box').css('margin-top') === '-15px');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-borders-around-your-elements.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-borders-around-your-elements.md
index 0aa95c6af1f..0c96c573e4f 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-borders-around-your-elements.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-borders-around-your-elements.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9bedf08813
-title: Add Borders Around Your Elements
+title: 요소에 테두리 (border) 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c2MvnHZ'
 forumTopicId: 16630
@@ -9,9 +9,9 @@ dashedName: add-borders-around-your-elements
 
 # --description--
 
-CSS borders have properties like `style`, `color` and `width`.
+CSS 테두리는 `style`, `color`, `width`와 같은 속성을 가집니다.
 
-For example, if we wanted to create a red, 5 pixel border around an HTML element, we could use this class:
+예를 들면, HTML 요소의 가장자리에 5px의 테두리를 만들고 싶다고 했을 때, 우리는 다음과 같은 클래스를 사용할 수 있습니다.
 
 ```html
 <style>
@@ -25,9 +25,9 @@ For example, if we wanted to create a red, 5 pixel border around an HTML element
 
 # --instructions--
 
-Create a class called `thick-green-border`. This class should add a 10px, solid, green border around an HTML element. Apply the class to your cat photo.
+`thick-green-border`라는 클래스를 만들어주세요. 이 클래스는 10px, 직선, 초록색의 보더를 HTML 요소에 적용해야 합니다. 고양이 사진에 클래스를 적용하세요.
 
-Remember that you can apply multiple classes to an element using its `class` attribute, by separating each class name with a space. For example:
+`class` 속성을 이용해 클래스 이름을 띄어쓰기로 분리하여 요소에 여러 개의 클래스를 적용할 수 있다는 것을 기억하세요. 예:
 
 ```html
 <img class="class1 class2">
@@ -35,19 +35,19 @@ Remember that you can apply multiple classes to an element using its `class` att
 
 # --hints--
 
-Your `img` element should have the class `smaller-image`.
+`img` 요소는 `smaller-image` 클래스를 가져야 합니다.
 
 ```js
 assert($('img').hasClass('smaller-image'));
 ```
 
-Your `img` element should have the class `thick-green-border`.
+`img` 요소는 `thick-green-border` 클래스를 가져야 합니다.
 
 ```js
 assert($('img').hasClass('thick-green-border'));
 ```
 
-Your image should have a border width of `10px`.
+이미지는 `10px` 두께의 테두리를 가져야 합니다.
 
 ```js
 assert(
@@ -57,13 +57,13 @@ assert(
 );
 ```
 
-Your image should have a border style of `solid`.
+이미지는 `solid` 스타일의 테두리를 가져야 합니다.
 
 ```js
 assert($('img').css('border-right-style') === 'solid');
 ```
 
-The border around your `img` element should be green.
+`img` 요소 주위의 테두리는 초록색이어야 합니다.
 
 ```js
 assert($('img').css('border-left-color') === 'rgb(0, 128, 0)');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-different-margins-to-each-side-of-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-different-margins-to-each-side-of-an-element.md
index f73e198f201..fc96d40fe22 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-different-margins-to-each-side-of-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-different-margins-to-each-side-of-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1248bd9aedf08824
-title: Add Different Margins to Each Side of an Element
+title: 요소의 각 측면에 서로 다른 마진을 추가하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cg4RWh4'
 forumTopicId: 16633
@@ -9,35 +9,35 @@ dashedName: add-different-margins-to-each-side-of-an-element
 
 # --description--
 
-Sometimes you will want to customize an element so that it has a different `margin` on each of its sides.
+가끔은 각 측면마다 다른 `margin`을 갖도록 요소를 커스터마이징하고 싶을 수도 있습니다.
 
-CSS allows you to control the `margin` of all four individual sides of an element with the `margin-top`, `margin-right`, `margin-bottom`, and `margin-left` properties.
+CSS는 `margin-top`, `margin-right`, `margin-bottom`, 그리고 `margin-left` 속성을 사용하여 요소의 네 가지 개별 측면에 대한 `margin`을 제어할 수 있습니다.
 
 # --instructions--
 
-Give the blue box a `margin` of `40px` on its top and left side, but only `20px` on its bottom and right side.
+파란 상자의 위쪽과 왼쪽 측면에는 `40px`의 `margin`을 부여하고, 아래쪽과 오른쪽 측면에는 `20px`만 부여합니다.
 
 # --hints--
 
-Your `blue-box` class should give the top of elements `40px` of `margin`.
+`blue-box` 클래스가 요소 위쪽에 `40px`의 `margin`을 부여합니다.
 
 ```js
 assert($('.blue-box').css('margin-top') === '40px');
 ```
 
-Your `blue-box` class should give the right of elements `20px` of `margin`.
+`blue-box` 클래스가 요소 오른쪽에 `20px`의 `margin`을 부여합니다.
 
 ```js
 assert($('.blue-box').css('margin-right') === '20px');
 ```
 
-Your `blue-box` class should give the bottom of elements `20px` of `margin`.
+`blue-box` 클래스가 요소 아래쪽에 `20px`의 `margin`을 부여합니다.
 
 ```js
 assert($('.blue-box').css('margin-bottom') === '20px');
 ```
 
-Your `blue-box` class should give the left of elements `40px` of `margin`.
+`blue-box` 클래스가 요소 왼쪽에 `40px`의 `margin`을 부여합니다.
 
 ```js
 assert($('.blue-box').css('margin-left') === '40px');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-different-padding-to-each-side-of-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-different-padding-to-each-side-of-an-element.md
index b0699d0fc87..985ba1001cc 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-different-padding-to-each-side-of-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-different-padding-to-each-side-of-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08824
-title: Add Different Padding to Each Side of an Element
+title: 요소의 측면에 각각 다른 패딩값을 추가하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cB7mwUw'
 forumTopicId: 16634
@@ -9,35 +9,35 @@ dashedName: add-different-padding-to-each-side-of-an-element
 
 # --description--
 
-Sometimes you will want to customize an element so that it has different amounts of `padding` on each of its sides.
+가끔은 각 측면마다 다른 `padding`을 갖도록 요소를 커스터마이징하고 싶을 수도 있습니다.
 
-CSS allows you to control the `padding` of all four individual sides of an element with the `padding-top`, `padding-right`, `padding-bottom`, and `padding-left` properties.
+CSS는`padding-top`, `padding-right`, `padding-bottom`, 그리고`padding-left` 속성을 사용하여 요소의 네 가지 개별 측면에 대한 `padding`을 제어할 수 있습니다.
 
 # --instructions--
 
-Give the blue box a `padding` of `40px` on its top and left side, but only `20px` on its bottom and right side.
+파란 상자의 위쪽과 왼쪽 측면에는 `40px`의 `padding`을 부여하고, 아래쪽과 오른쪽 측면에는 `20px`만 부여합니다.
 
 # --hints--
 
-Your `blue-box` class should give the top of the elements `40px` of `padding`.
+`blue-box` 클래스는 요소 위쪽에 `40px`의 `padding`을 부여해야 합니다.
 
 ```js
 assert($('.blue-box').css('padding-top') === '40px');
 ```
 
-Your `blue-box` class should give the right of the elements `20px` of `padding`.
+`blue-box` 클래스는 요소 오른쪽에 `20px`의 `padding`을 부여해야 합니다.
 
 ```js
 assert($('.blue-box').css('padding-right') === '20px');
 ```
 
-Your `blue-box` class should give the bottom of the elements `20px` of `padding`.
+`blue-box` 클래스는 요소 아래쪽에 `20px`의 `padding`을 부여해야 합니다.
 
 ```js
 assert($('.blue-box').css('padding-bottom') === '20px');
 ```
 
-Your `blue-box` class should give the left of the elements `40px` of `padding`.
+`blue-box` 클래스는 요소 왼쪽에 `40px`의 `padding`을 부여해야 합니다.
 
 ```js
 assert($('.blue-box').css('padding-left') === '40px');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-rounded-corners-with-border-radius.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-rounded-corners-with-border-radius.md
index 3e24a525849..66f03fb3a3c 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-rounded-corners-with-border-radius.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/add-rounded-corners-with-border-radius.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08814
-title: Add Rounded Corners with border-radius
+title: border-radius를 사용하여 둥근 모서리 추가하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cbZm2hg'
 forumTopicId: 16649
@@ -9,23 +9,23 @@ dashedName: add-rounded-corners-with-border-radius
 
 # --description--
 
-Your cat photo currently has sharp corners. We can round out those corners with a CSS property called `border-radius`.
+고양이 사진은 현재 날카로운 모서리를 가지고 있습니다. `border-radius`라는 CSS 속성을 사용하여 이 모서리들을 둥글게 만들 수 있습니다.
 
 # --instructions--
 
-You can specify a `border-radius` with pixels. Give your cat photo a `border-radius` of `10px`.
+픽셀로 `border-radius`를 지정할 수 있습니다. 고양이 사진에 `10px`의 `border-radius`를 부여합니다.
 
-**Note:** This challenge allows for multiple possible solutions. For example, you may add `border-radius` to either the `.thick-green-border` class or the `.smaller-image` class.
+**참고:** 이 챌린지는 여러 가지 해결책을 허용합니다. 예를 들어 `.thick-green-border` 클래스나 `.smaller-image` 클래스 중 하나에 `border-radius`를 추가할 수 있습니다.
 
 # --hints--
 
-Your image element should have the class `thick-green-border`.
+사진 요소는 `thick-green-border` 클래스를 가져야 합니다.
 
 ```js
 assert($('img').hasClass('thick-green-border'));
 ```
 
-Your image should have a border radius of `10px`.
+이미지는 `10px`의 테두리 반지름을 가져야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/adjust-the-margin-of-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/adjust-the-margin-of-an-element.md
index 31a48593e00..9a13748af45 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/adjust-the-margin-of-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/adjust-the-margin-of-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08822
-title: Adjust the Margin of an Element
+title: 요소의 마진 조절하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cVJarHW'
 forumTopicId: 16654
@@ -9,19 +9,19 @@ dashedName: adjust-the-margin-of-an-element
 
 # --description--
 
-An element's `margin` controls the amount of space between an element's `border` and surrounding elements.
+요소의 `margin`은 요소의 `border`와 주위 요소들 사이의 공간을 설정합니다.
 
-Here, we can see that the blue box and the red box are nested within the yellow box. Note that the red box has a bigger `margin` than the blue box, making it appear smaller.
+파란 상자와 빨간 상자가 노란 상자 안에 중첩되어 있습니다. 빨간 상자는 파란 상자보다 큰 `margin`을 가지고 있어 상대적으로 작아 보입니다.
 
-When you increase the blue box's `margin`, it will increase the distance between its border and surrounding elements.
+파란 상자의 `margin`을 증가시키면 테두리와 주변 요소 간의 거리가 증가합니다.
 
 # --instructions--
 
-Change the `margin` of the blue box to match that of the red box.
+파란 상자의 `margin`을 빨간 상자의 것과 동일하게 변경합니다.
 
 # --hints--
 
-Your `blue-box` class should give elements `20px` of `margin`.
+`blue-box` 클래스는 요소에 `20px`의 `margin`을 부여합니다.
 
 ```js
 assert($('.blue-box').css('margin-top') === '20px');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/adjust-the-padding-of-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/adjust-the-padding-of-an-element.md
index cbbd38c5d89..d31759b612a 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/adjust-the-padding-of-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/adjust-the-padding-of-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad88fee1348bd9aedf08825
-title: Adjust the Padding of an Element
+title: 요소의 패딩 조절하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cED8ZC2'
 forumTopicId: 301083
@@ -9,25 +9,25 @@ dashedName: adjust-the-padding-of-an-element
 
 # --description--
 
-Now let's put our Cat Photo App away for a little while and learn more about styling HTML.
+잠시 Cat Photo App을 내려놓고 HTML 스타일링에 대해 더 알아보겠습니다.
 
-You may have already noticed this, but all HTML elements are essentially little rectangles.
+이미 눈치 채셨을 수도 있지만, 모든 HTML 요소는 본질적으로 작은 직사각형입니다.
 
-Three important properties control the space that surrounds each HTML element: `padding`, `border`, and `margin`.
+각 HTML 요소를 둘러싸는 공간을 제어하는 세 가지 중요한 속성이 있는데, 이는 `padding`, `border`, 그리고 `margin`입니다.
 
-An element's `padding` controls the amount of space between the element's content and its `border`.
+요소의 `padding`은 요소의 콘텐츠와 그 `border` 사이의 공간을 제어합니다.
 
-Here, we can see that the blue box and the red box are nested within the yellow box. Note that the red box has more `padding` than the blue box.
+파란 상자와 빨간 상자가 노란 상자 안에 중첩되어 있는 것을 볼 수 있습니다. 빨간 상자는 파란 상자보다 더 많은 `padding`을 가지고 있습니다.
 
-When you increase the blue box's `padding`, it will increase the distance (`padding`) between the text and the border around it.
+파란 상자의 `padding`을 증가시키면 텍스트와 그 주변의 테두리 간의 거리(`padding`)가 증가합니다.
 
 # --instructions--
 
-Change the `padding` of your blue box to match that of your red box.
+파란 상자의 `padding`을 빨간 상자의 것과 동일하게 변경합니다.
 
 # --hints--
 
-Your `blue-box` class should give elements `20px` of `padding`.
+`blue-box` 클래스는 요소에 `20px`의 `padding`을 부여합니다.
 
 ```js
 assert($('.blue-box').css('padding-top') === '20px');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/attach-a-fallback-value-to-a-css-variable.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/attach-a-fallback-value-to-a-css-variable.md
index 1d49492240f..acc735b7410 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/attach-a-fallback-value-to-a-css-variable.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/attach-a-fallback-value-to-a-css-variable.md
@@ -1,6 +1,6 @@
 ---
 id: 5a9d7286424fe3d0e10cad13
-title: Attach a Fallback value to a CSS Variable
+title: CSS변수에 Fallback 값 추가하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c6bDNfp'
 forumTopicId: 301084
@@ -9,25 +9,25 @@ dashedName: attach-a-fallback-value-to-a-css-variable
 
 # --description--
 
-When using your variable as a CSS property value, you can attach a fallback value that your browser will revert to if the given variable is invalid.
+CSS속성 값으로 변수를 사용할 때, 지정된 변수가 유효하지 않을 경우 브라우저가 반환할 fallback 값을 추가할 수 있습니다.
 
-**Note:** This fallback is not used to increase browser compatibility, and it will not work on IE browsers. Rather, it is used so that the browser has a color to display if it cannot find your variable.
+**Note:** fallback은 브라우저 호환성을 높이는데 사용되지는 않으며, IE(인터넷 익스플로어) 브라우저에서는 작동하지 않습니다. 오히려, 브라우저가 변수를 찾을 수 없는 경우 표시할 색상을 갖도록 사용됩니다.
 
-Here's how you do it:
+방법은 다음과 같습니다:
 
 ```css
 background: var(--penguin-skin, black);
 ```
 
-This will set background to `black` if your variable wasn't set. Note that this can be useful for debugging.
+만약 변수가 설정되어 있지 않다면 배경색이 `black`으로 설정될 것입니다. 이것은 디버깅에 유용합니다.
 
 # --instructions--
 
-It looks like there is a problem with the variables supplied to the `.penguin-top` and `.penguin-bottom` classes. Rather than fix the typo, add a fallback value of `black` to the `background` property of the `.penguin-top` and `.penguin-bottom` classes.
+`.penguin-top` 및 `.penguin-bottom` 클래스에 제공된 변수에 문제가 있는 것처럼 보입니다. 타이핑을 수정하는 것보다, `.penguin-top` 및`.penguin-bottom` 클래스의 `background` 속성에 fallback value로 `black`를 추가하는 것이 좋습니다.
 
 # --hints--
 
-The fallback value of `black` should be used in the `background` property of the `penguin-top` class.
+Fallback 값 `black`은 `penguin-top` 클래스의 `background` 속성에 사용되어야 합니다.
 
 ```js
 assert(
@@ -37,7 +37,7 @@ assert(
 );
 ```
 
-The fallback value of `black` should be used in `background` property of the `penguin-bottom` class.
+Fallback 값 `black`은 `penguin-bottom` 클래스의 `background` 속성에 사용되어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/change-a-variable-for-a-specific-area.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/change-a-variable-for-a-specific-area.md
index f27c91041d1..cbe2e011324 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/change-a-variable-for-a-specific-area.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/change-a-variable-for-a-specific-area.md
@@ -1,6 +1,6 @@
 ---
 id: 5a9d72a1424fe3d0e10cad15
-title: Change a variable for a specific area
+title: 특정 영역에 대한 변수 변경하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cdRwbuW'
 forumTopicId: 301085
@@ -9,17 +9,17 @@ dashedName: change-a-variable-for-a-specific-area
 
 # --description--
 
-When you create your variables in `:root` they will set the value of that variable for the whole page.
+`:root`에 변수를 생성하면 전체 페이지에 해당 변수의 값이 설정됩니다.
 
-You can then overwrite these variables by setting them again within a specific selector.
+그런 다음 특정 선택자(selector)에서 변수를 다시 설정하여 이러한 변수를 덮어쓸 수 있습니다.
 
 # --instructions--
 
-Change the value of `--penguin-belly` to `white` in the `penguin` class.
+`penguin` 클래스에서 `--penguin-belly` 값을 `white`로 변경하십시오.
 
 # --hints--
 
-The `penguin` class should reassign the `--penguin-belly` variable to `white`.
+`penguin` 클래스는 `--penguin-belly` 값을 `white`로 다시 할당해야 합니다.
 
 ```js
 assert(
@@ -27,13 +27,13 @@ assert(
 );
 ```
 
-The `penguin` class should not contain the `background-color` property.
+`penguin` 클래스에 `background-color` 속성이 포함되면 안 됩니다.
 
 ```js
 assert(
   code.match(/^((?!background-color\s*?:\s*?)[\s\S])*$/g)
 );
-``` 
+```
 
 
 # --seed--
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/change-the-color-of-text.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/change-the-color-of-text.md
index 7057023cd31..0e392acf9f3 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/change-the-color-of-text.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/change-the-color-of-text.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08803
-title: Change the Color of Text
+title: 텍스트의 색상 바꾸기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cRkVmSm'
 forumTopicId: 16775
@@ -9,39 +9,39 @@ dashedName: change-the-color-of-text
 
 # --description--
 
-Now let's change the color of some of our text.
+이제 일부 텍스트의 색상을 변경해 보겠습니다.
 
-We can do this by changing the `style` of your `h2` element.
+`h2`요소의 `style`를 변경함으로써 색상을 변경할 수 있습니다.
 
-The property that is responsible for the color of an element's text is the `color` style property.
+스타일 속성인 `color`가 요소의 텍스트 색상을 담당하고 있습니다.
 
-Here's how you would set your `h2` element's text color to blue:
+`h2`요소의 텍스트 색상을 파란색으로 바꾸는 방법은 다음과 같습니다.
 
 ```html
 <h2 style="color: blue;">CatPhotoApp</h2>
 ```
 
-Note that it is a good practice to end inline `style` declarations with a `;` .
+인라인 `style`선언은 `;`로 끝내는 것이 좋습니다.
 
 # --instructions--
 
-Change your `h2` element's style so that its text color is red.
+`h2`요소의 텍스트 색상이 빨간색이 되도록 변경하세요.
 
 # --hints--
 
-Your `h2` element should have a `style` declaration.
+`h2`요소에는 `style` 선언이 있어야 합니다.
 
 ```js
 assert($('h2').attr('style'));
 ```
 
-Your `h2` element should have color set to `red`.
+`h2`요소는 `red`색상으로 설정되어야 합니다.
 
 ```js
 assert($('h2')[0].style.color === 'red');
 ```
 
-Your `style` declaration should end with a `;` .
+`style`선언은 `;`로 끝나야 합니다.
 
 ```js
 assert($('h2').attr('style') && $('h2').attr('style').endsWith(';'));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/change-the-font-size-of-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/change-the-font-size-of-an-element.md
index bbd64626de7..0ee14ff2eaf 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/change-the-font-size-of-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/change-the-font-size-of-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08806
-title: Change the Font Size of an Element
+title: 요소의 폰트 크기 바꾸기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c3bvDc8'
 forumTopicId: 16777
@@ -9,7 +9,7 @@ dashedName: change-the-font-size-of-an-element
 
 # --description--
 
-Font size is controlled by the `font-size` CSS property, like this:
+폰트 크기는 다음과 같이 `font-size` CSS 속성으로 제어됩니다.
 
 ```css
 h1 {
@@ -19,11 +19,11 @@ h1 {
 
 # --instructions--
 
-Inside the same `<style>` tag that contains your `red-text` class, create an entry for `p` elements and set the `font-size` to 16 pixels (`16px`).
+`red-text` 클래스를 포함하는 동일한 `<style>` 태그 내부에 `p` 요소에 대한 항목을 만들고 `font-size`를 16 픽셀로 설정하세요 (`16px`).
 
 # --hints--
 
-Between the `style` tags, give the `p` elements `font-size` of `16px`. Browser and Text zoom should be at 100%.
+`style` 태그 사이에서 `p` 요소에 `font-size`를 `16px`로 지정하세요. 브라우저와 텍스트 줌을 100%로 설정해야 합니다.
 
 ```js
 assert(code.match(/p\s*{\s*font-size\s*:\s*16\s*px\s*;\s*}/i));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/create-a-custom-css-variable.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/create-a-custom-css-variable.md
index e23df3927a3..c826a034aca 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/create-a-custom-css-variable.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/create-a-custom-css-variable.md
@@ -1,6 +1,6 @@
 ---
 id: 5a9d726c424fe3d0e10cad11
-title: Create a custom CSS Variable
+title: 커스텀 CSS 변수 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cQd27Hr'
 forumTopicId: 301086
@@ -9,21 +9,21 @@ dashedName: create-a-custom-css-variable
 
 # --description--
 
-To create a CSS variable, you just need to give it a name with two hyphens in front of it and assign it a value like this:
+CSS 변수를 만들려면 변수 이름 앞에 두 개의 하이픈을 넣고 다음과 같이 값을 할당해 주면 됩니다.
 
 ```css
 --penguin-skin: gray;
 ```
 
-This will create a variable named `--penguin-skin` and assign it the value of `gray`. Now you can use that variable elsewhere in your CSS to change the value of other properties to gray.
+그러면 `--penguin-skin`이라는 이름의 변수가 생성되고 `gray`라는 값이 할당됩니다. 이제 CSS의 어디에서나 해당 변수를 사용하여 다른 속성의 값을 회색으로 바꿀 수 있습니다.
 
 # --instructions--
 
-In the `penguin` class, create a variable name `--penguin-skin` and give it a value of `gray`.
+`penguin` 클래스에서 `--penguin-skin`이라는 변수 이름을 만들고 `gray` 값을 할당하십시오.
 
 # --hints--
 
-`penguin` class should declare the `--penguin-skin` variable and assign it to `gray`.
+`penguin` 클래스는 `--penguin-skin` 변수를 선언하고 `gray`로 할당해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/give-a-background-color-to-a-div-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/give-a-background-color-to-a-div-element.md
index aad5fc61870..e41d1fd8ba6 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/give-a-background-color-to-a-div-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/give-a-background-color-to-a-div-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fed1348bd9aede07836
-title: Give a Background Color to a div Element
+title: div 요소에 배경색 주기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cdRKMCk'
 forumTopicId: 18190
@@ -9,9 +9,9 @@ dashedName: give-a-background-color-to-a-div-element
 
 # --description--
 
-You can set an element's background color with the `background-color` property.
+`background-color` 속성을 사용하여 요소의 배경색을 설정할 수 있습니다.
 
-For example, if you wanted an element's background color to be `green`, you'd put this within your `style` element:
+예를 들어, 요소의 배경색을 `green`으로 설정하려면 다음과 같이 `style` 요소 안에 넣습니다.
 
 ```css
 .green-background {
@@ -21,23 +21,23 @@ For example, if you wanted an element's background color to be `green`, you'd pu
 
 # --instructions--
 
-Create a class called `silver-background` with the `background-color` of `silver`. Assign this class to your `div` element.
+`silver`의 `background-color`를 갖는 `silver-background` 클래스를 생성하세요. `div` 요소에 이 클래스를 적용하세요.
 
 # --hints--
 
-Your`div` element should have the class `silver-background`.
+`div` 요소에는 `silver-background` 클래스가 있어야 합니다.
 
 ```js
 assert($('div').hasClass('silver-background'));
 ```
 
-Your `div` element should have a silver background.
+`div` 요소는 silver 배경색을 갖고 있어야 합니다.
 
 ```js
 assert($('div').css('background-color') === 'rgb(192, 192, 192)');
 ```
 
-A class named `silver-background` should be defined within the `style` element and the value of `silver` should be assigned to the `background-color` property.
+`silver-background` 클래스는 `style` 요소 내에서 정의되어야 하며, `background-color` 속성에는 `silver`의 값이 할당되어야 합니다.
 
 ```js
 assert(code.match(/\.silver-background\s*{\s*background-color\s*:\s*silver\s*;?\s*}/));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/import-a-google-font.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/import-a-google-font.md
index 7448cf89e1a..d1cac1864c2 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/import-a-google-font.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/import-a-google-font.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08807
-title: Import a Google Font
+title: 구글 폰트 가져오기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cM9MRsJ'
 forumTopicId: 18200
@@ -9,41 +9,41 @@ dashedName: import-a-google-font
 
 # --description--
 
-In addition to specifying common fonts that are found on most operating systems, we can also specify non-standard, custom web fonts for use on our website. There are many sources for web fonts on the Internet. For this example we will focus on the Google Fonts library.
+다수의 운영 체제에서 찾을 수 있는 일반적인 글꼴을 지정하는 것 외에도 웹 사이트에서 사용할 비표준, 사용자 정의 웹 글꼴을 지정할 수 있습니다. 인터넷에는 웹 글꼴을 얻을 수 있는 많은 소스가 있습니다. 이 예제에서는 Google Fonts 라이브러리에 중점을 둡니다.
 
-Google Fonts is a free library of web fonts that you can use in your CSS by referencing the font's URL.
+Google Fonts는 웹 폰트의 무료 라이브러리로, 해당 폰트의 URL을 참조하여 CSS에서 사용할 수 있습니다.
 
-So, let's go ahead and import and apply a Google font (note that if Google is blocked in your country, you will need to skip this challenge).
+그러면 Google 폰트를 가져와 적용해 보겠습니다. (참고: Google이 귀하의 국가에서 차단된 경우 이 도전 과제를 건너뛰어야 합니다.)
 
-To import a Google Font, you can copy the font's URL from the Google Fonts library and then paste it in your HTML. For this challenge, we'll import the `Lobster` font. To do this, copy the following code snippet and paste it into the top of your code editor (before the opening `style` element):
+Google 폰트를 가져오려면 Google Fonts 라이브러리에서 폰트의 URL을 복사한 다음 HTML에 붙여넣으면 됩니다. 이 도전에서는 `Lobster` 폰트를 가져올 것입니다. 이를 위해 다음 코드 스니펫을 복사하고 코드 편집기의 맨 위에 붙여 넣으세요 (opening `style` element 이전에).
 
 ```html
 <link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
 ```
 
-Now you can use the `Lobster` font in your CSS by using `Lobster` as the FAMILY_NAME as in the following example:
+이제 다음 예제처럼 FAMILY_NAME으로 `Lobster`를 사용하여 CSS에서 `Lobster` 글꼴을 사용할 수 있습니다.
 
 ```css
 font-family: FAMILY_NAME, GENERIC_NAME;
 ```
 
-The GENERIC_NAME is optional, and is a fallback font in case the other specified font is not available. This is covered in the next challenge.
+GENERIC_NAME은 선택 사항이며 다른 지정된 글꼴을 사용할 수 없는 경우 대체 글꼴로 사용됩니다. 이것은 다음 첼린지에서 살펴보겠습니다.
 
-Family names are case-sensitive and need to be wrapped in quotes if there is a space in the name. For example, you need quotes to use the `"Open Sans"` font, but not to use the `Lobster` font.
+Family names은 대소문자를 구별하며 이름에 공백이 있으면 따옴표로 둘러싸야 합니다. 예를 들어, `"Open Sans"` 폰트를 사용하려면 따옴표가 필요하지만 `Lobster` 폰트를 사용할 때는 따옴표가 필요하지 않습니다.
 
 # --instructions--
 
-Import the `Lobster` font to your web page. Then, use an element selector to set `Lobster` as the `font-family` for your `h2` element.
+당신의 웹페이지에 `Lobster` 폰트를 가져오세요. 그런 다음, `h2` 요소에 대한 `font-family`로 `Lobster`를 설정하기 위해 요소 선택자를 사용하세요.
 
 # --hints--
 
-You should import the `Lobster` font.
+`Lobster` 폰트를 가져와야 합니다.
 
 ```js
 assert($('link[href*="googleapis" i]').length);
 ```
 
-Your `h2` element should use the font `Lobster`.
+`h2` 요소는 `Lobster` 폰트를 써야합니다.
 
 ```js
 assert(
@@ -53,7 +53,7 @@ assert(
 );
 ```
 
-You should only use an `h2` element selector to change the font.
+폰트를 변경하려면 `h2` 요소 선택자만 사용해야 합니다.
 
 ```js
 assert(
@@ -63,7 +63,7 @@ assert(
 );
 ```
 
-Your `p` element should still use the font `monospace`.
+`p` 요소는 여전히 `monospace` 폰트를 사용해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/improve-compatibility-with-browser-fallbacks.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/improve-compatibility-with-browser-fallbacks.md
index 214fac94d8a..f30db054e4e 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/improve-compatibility-with-browser-fallbacks.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/improve-compatibility-with-browser-fallbacks.md
@@ -1,6 +1,6 @@
 ---
 id: 5b7d72c338cd7e35b63f3e14
-title: Improve Compatibility with Browser Fallbacks
+title: 브라우저 Fallbacks로 호환성 향상하기
 challengeType: 0
 videoUrl: ''
 forumTopicId: 301087
@@ -9,19 +9,19 @@ dashedName: improve-compatibility-with-browser-fallbacks
 
 # --description--
 
-When working with CSS you will likely run into browser compatibility issues at some point. This is why it's important to provide browser fallbacks to avoid potential problems.
+CSS로 작업을 할 때 브라우저 호환성 문제가 생길 가능성이 있습니다 잠재적인 문제발생 가능성을 배제하기 위해 브라우저 fallbacks를 제공하는 것이 중요한 이유입니다.
 
-When your browser parses the CSS of a webpage, it ignores any properties that it doesn't recognize or support. For example, if you use a CSS variable to assign a background color on a site, Internet Explorer will ignore the background color because it does not support CSS variables. In that case, the browser will use whatever value it has for that property. If it can't find any other value set for that property, it will revert to the default value, which is typically not ideal.
+브라우저가 웹 페이지의 CSS를 파싱할 때, 이것은 브라우저가 인식하지 못하거나 지원하지 않는 모든 속성들을 무시합니다. 예를 들어, 만약 사이트의 배경색에 CSS 변수를 사용한다면 인터넷 익스플로어는 CSS 변수를 지원하지 않기 때문에 그 배경색을 무시할 것입니다. 이 경우 브라우저는 해당 속성에 관련된 어떤 값이든 사용합니다. 만약 속성에 대한 어떤 값도 찾지 못한다면, 일반적으로 적절하지 않을 수도 있을 기본 값을 사용합니다.
 
-This means that if you do want to provide a browser fallback, it's as easy as providing another more widely supported value immediately before your declaration. That way an older browser will have something to fall back on, while a newer browser will just interpret whatever declaration comes later in the cascade.
+즉, 브라우저에 fallback을 제공하는 것은 선언 전에 포괄적으로 지원되는 다른 값을 사용하는 것 만큼 간단합니다. 그렇게 하면 구형 브러우저들은 다시 적용될 어떤 값을 가질 것이고, 신형 브라우저의 경우 캐스캐이딩 이후 무엇이 선언될지 해석할 것 입니다.
 
 # --instructions--
 
-It looks like a variable is being used to set the background color of the `.red-box` class. Let's improve our browser compatibility by adding another `background` declaration right before the existing declaration and set its value to `red`.
+`.red-box`클래스의 배경색을 설정하기 위해 변수를 사용하는 것처럼 보입니다. 브라우저 호환성을 향상시키기 위해, 기존 선언 직전에 다른 `background`를 추가로 선언하여 그 값을 `red`로 설정해보세요.
 
 # --hints--
 
-Your `.red-box` rule should include a fallback with the `background` set to `red` immediately before the existing `background` declaration.
+`.red-box` 규칙은 기존 `background` 선언 직전에 `background`가 `red`로 설정된 fallback을 포함해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/inherit-css-variables.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/inherit-css-variables.md
index 5bc6b580ab8..bb369849ecb 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/inherit-css-variables.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/inherit-css-variables.md
@@ -1,6 +1,6 @@
 ---
 id: 5a9d7295424fe3d0e10cad14
-title: Inherit CSS Variables
+title: CSS 변수 상속
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cyLZZhZ'
 forumTopicId: 301088
@@ -9,19 +9,19 @@ dashedName: inherit-css-variables
 
 # --description--
 
-When you create a variable, it is available for you to use inside the selector in which you create it. It also is available in any of that selector's descendants. This happens because CSS variables are inherited, just like ordinary properties.
+변수를 생성하면 생성한 선택자(selector) 내에서 변수를 사용할 수 있습니다. 또한 해당 선택자의 하위 항목에서도 사용할 수 있습니다. CSS의 변수는 일반 속성처럼 상속되기 때문입니다.
 
-To make use of inheritance, CSS variables are often defined in the <dfn>:root</dfn> element.
+상속을 활용하기 위해 CSS 변수를 종종 <dfn>:root</dfn> 요소 안에 정의하기도 합니다.
 
-`:root` is a <dfn>pseudo-class</dfn> selector that matches the root element of the document, usually the `html` element. By creating your variables in `:root`, they will be available globally and can be accessed from any other selector in the style sheet.
+`:root`는 보통 다큐먼트의 root 요소인 `html` 요소와 일치하는 <dfn>pseudo-class</dfn> 선택자입니다. `:root`에 변수를 생성하면 전역에서 사용할 수 있으며 스타일 시트의 다른 선택자에서도 액세스 할 수 있습니다.
 
 # --instructions--
 
-Define a variable named `--penguin-belly` in the `:root` selector and give it the value of `pink`. You can then see that the variable is inherited and that all the child elements which use it get pink backgrounds.
+`:root` 선택자 안에 `--penguin-belly`라는 변수를 정의하고 `pink` 값을 지정하세요. 변수가 상속되면서 이를 사용하는 모든 자식 요소의 배경색이 핑크색이 된 것을 확인할 수 있습니다.
 
 # --hints--
 
-The `--penguin-belly` variable should be declared in the `:root` and assigned the value `pink`.
+`--penguin-belly` 변수는 `:root` 안에 선언되어야 하며, `pink` 값이 할당되어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/inherit-styles-from-the-body-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/inherit-styles-from-the-body-element.md
index fbb294a03a2..082b475e9a8 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/inherit-styles-from-the-body-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/inherit-styles-from-the-body-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08746
-title: Inherit Styles from the Body Element
+title: HTML Body 요소로부터 스타일 상속하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c9bmdtR'
 forumTopicId: 18204
@@ -9,27 +9,27 @@ dashedName: inherit-styles-from-the-body-element
 
 # --description--
 
-Now we've proven that every HTML page has a `body` element, and that its `body` element can also be styled with CSS.
+이제 모든 HTML 페이지에는 `body` 요소가 있고, 해당 `body` 요소에 대해 CSS로 스타일을 지정할 수 있음을 확인했습니다.
 
-Remember, you can style your `body` element just like any other HTML element, and all your other elements will inherit your `body` element's styles.
+`body` 요소에도 다른 HTML 요소들과 마찬가지로 CSS를 통해 스타일을 지정할 수 있고, 다른 모든 요소들은 `body` 요소에 지정된 스타일을 상속받게 된다는 점을 기억하세요.
 
 # --instructions--
 
-First, create a `h1` element with the text `Hello World`
+먼저, `Hello World`라는 텍스트를 가진 `h1` 요소를 생성해주세요.
 
-Then, let's give all elements on your page the color of `green` by adding `color: green;` to your `body` element's style declaration.
+`body` 요소의 스타일 선언에 `color: green;`을 추가해 페이지의 모든 요소들에 `green` 색상을 적용해 주세요.
 
-Finally, give your `body` element the font-family of `monospace` by adding `font-family: monospace;` to your `body` element's style declaration.
+마지막으로, `body` 요소의 스타일 선언에 `font-family: monospace;`를 추가하여 `body`요소에 `monospace` 글꼴을 적용해주세요.
 
 # --hints--
 
-You should create an `h1` element.
+`h1` 요소를 생성해야 합니다.
 
 ```js
 assert($('h1').length > 0);
 ```
 
-Your `h1` element should have the text `Hello World`.
+`h1` 요소에는 `Hello World` 라는 텍스트가 있어야 합니다.
 
 ```js
 assert(
@@ -40,7 +40,7 @@ assert(
 );
 ```
 
-Your `h1` element should have a closing tag.
+`h1` 요소에는 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
@@ -50,13 +50,13 @@ assert(
 );
 ```
 
-Your `body` element should have the `color` property of `green`.
+`body`요소에는 `color` 속성이 있어야 하며 이 속성값은 `green`이어야 합니다.
 
 ```js
 assert($('body').css('color') === 'rgb(0, 128, 0)');
 ```
 
-Your `body` element should have the `font-family` property of `monospace`.
+`body`요소에는 `font-family` 속성이 있어야 하며 이 속성값은 `monospace`이어야 합니다.
 
 ```js
 assert(
@@ -66,7 +66,7 @@ assert(
 );
 ```
 
-Your `h1` element should inherit the font `monospace` from your `body` element.
+`h1`요소는 `body`요소로부터 `monospace` 폰트를 상속받아야 합니다.
 
 ```js
 assert(
@@ -77,7 +77,7 @@ assert(
 );
 ```
 
-Your `h1` element should inherit the color `green` from your `body` element.
+`h1`요소는 `body`요소로부터 `green` 색상을 상속받아야 합니다.
 
 ```js
 assert($('h1').length > 0 && $('h1').css('color') === 'rgb(0, 128, 0)');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/make-circular-images-with-a-border-radius.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/make-circular-images-with-a-border-radius.md
index a419b2eb155..65024e4647d 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/make-circular-images-with-a-border-radius.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/make-circular-images-with-a-border-radius.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08815
-title: Make Circular Images with a border-radius
+title: border-radius를 사용하여 원형 이미지 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c2MvrcB'
 forumTopicId: 18229
@@ -9,21 +9,21 @@ dashedName: make-circular-images-with-a-border-radius
 
 # --description--
 
-In addition to pixels, you can also specify the `border-radius` using a percentage.
+픽셀 외에도 `border-radius`를 퍼센트로 지정할 수 있습니다.
 
 # --instructions--
 
-Give your cat photo a `border-radius` of `50%`.
+고양이 사진에 `50%`의 `border-radius`를 부여합니다.
 
 # --hints--
 
-Your image should have a border radius of `50%`, making it perfectly circular.
+이미지는 완벽한 원 모양이기 위해서 `50%`의 테두리 반지름을 가져야 합니다.
 
 ```js
 assert(parseInt($('img').css('border-top-left-radius')) > 48);
 ```
 
-The `border-radius` value should use a percentage value of `50%`.
+`border-radius` 값은 `50%`의 퍼센트 값을 사용해야 합니다.
 
 ```js
 assert(code.match(/50%/g));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-all-other-styles-by-using-important.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-all-other-styles-by-using-important.md
index 4c4c24d79d9..920d92e6e10 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-all-other-styles-by-using-important.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-all-other-styles-by-using-important.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf07756
-title: Override All Other Styles by using Important
+title: '!important를 사용하여 다른 스타일 덮어쓰기'
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cm24rcp'
 forumTopicId: 18249
@@ -9,19 +9,19 @@ dashedName: override-all-other-styles-by-using-important
 
 # --description--
 
-Yay! We just proved that inline styles will override all the CSS declarations in your `style` element.
+야호! 방금 인라인 스타일이 `style` 요소의 모든 CSS 선언을 덮어쓰는 것을 확인했습니다.
 
-But wait. There's one last way to override CSS. This is the most powerful method of all. But before we do it, let's talk about why you would ever want to override CSS.
+그러나 여기서 잠깐, CSS를 덮어쓰는 마지막 방법이 하나 남았습니다. 이것은 가장 강력한 방법입니다. 알아보기 전에 왜 CSS를 덮어쓸 필요가 있는지에 대해 알아보겠습니다.
 
-In many situations, you will use CSS libraries. These may accidentally override your own CSS. So when you absolutely need to be sure that an element has specific CSS, you can use `!important`.
+많은 경우에 우리는 CSS 라이브러리를 사용하게 됩니다. 이 라이브러리들은 우연히 우리가 직접 작성한 CSS를 덮어쓰게 될지도 모릅니다. 한 요소에 특정 CSS가 적용되어 있도록 확실히 만들 필요가 있을 때 `!important`를 사용할 수 있습니다.
 
-Let's go all the way back to our `pink-text` class declaration. Remember that our `pink-text` class was overridden by subsequent class declarations, id declarations, and inline styles.
+`pink-text` 클래스 정의로 다시 돌아가보겠습니다. `pink-text` 클래스는 하위 클래스 정의, 아이디 정의 그리고 인라인 스타일로 덮어씌어질 수 있습니다.
 
 # --instructions--
 
-Let's add the keyword `!important` to your pink-text element's color declaration to make 100% sure that your `h1` element will be pink.
+`h1` 요소가 100% 확실하게 분홍색이 되도록 pink-text 요소의 색깔 정의에 키워드 `!important`를 추가하세요.
 
-An example of how to do this is:
+적용 방법에 대한 예시:
 
 ```css
 color: red !important;
@@ -29,31 +29,31 @@ color: red !important;
 
 # --hints--
 
-Your `h1` element should have the class `pink-text`.
+`h1` 요소는 `pink-text` 클래스를 가져야 합니다.
 
 ```js
 assert($('h1').hasClass('pink-text'));
 ```
 
-Your `h1` element should have the class `blue-text`.
+`h1` 요소는 `blue-text` 클래스를 가져야 합니다.
 
 ```js
 assert($('h1').hasClass('blue-text'));
 ```
 
-Your `h1` element should have the `id` of `orange-text`.
+`h1` 요소는 `orange-text`의 `id`를 가져야 합니다.
 
 ```js
 assert($('h1').attr('id') === 'orange-text');
 ```
 
-Your `h1` element should have the inline style of `color: white`.
+`h1` 요소는 인라인 스타일 `color: white`를 가져야 합니다.
 
 ```js
 assert(code.match(/<h1.*style/gi) && code.match(/<h1.*style.*color\s*?:/gi));
 ```
 
-Your `pink-text` class declaration should have the `!important` keyword to override all other declarations.
+`pink-text` 클래스 정의는 다른 정의를 덮어 쓰도록 `!important` 키워드를 가져야 합니다.
 
 ```js
 assert(
@@ -61,7 +61,7 @@ assert(
 );
 ```
 
-Your `h1` element should be pink.
+`h1` 요소는 분홍색이어야 합니다.
 
 ```js
 assert($('h1').css('color') === 'rgb(255, 192, 203)');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-class-declarations-by-styling-id-attributes.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-class-declarations-by-styling-id-attributes.md
index 5ab79faf828..8defe370058 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-class-declarations-by-styling-id-attributes.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-class-declarations-by-styling-id-attributes.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd8aedf06756
-title: Override Class Declarations by Styling ID Attributes
+title: 스타일링 ID 속성을 통한 클래스 선언 덮어쓰기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cRkpDhB'
 forumTopicId: 18251
@@ -9,23 +9,23 @@ dashedName: override-class-declarations-by-styling-id-attributes
 
 # --description--
 
-We just proved that browsers read CSS from top to bottom in order of their declaration. That means that, in the event of a conflict, the browser will use whichever CSS declaration came last. Notice that if we even had put `blue-text` before `pink-text` in our `h1` element's classes, it would still look at the declaration order and not the order of their use!
+우리는 방금 브라우저가 CSS를 선언 순서대로 위에서 아래로 읽는다는 것을 증명했습니다. 이 말은 즉, 충돌이 일어 났을 때 브라우저는 가장 마지막에 오는 CSS 선언을 사용한다는 것입니다. 만약 `h1`요소의 클래스 속성에서 `blue-text`를 `pink-text`앞에 넣었더라도, 사용 순서가 아닌 선언 순서를 참조할 것입니다.
 
-But we're not done yet. There are other ways that you can override CSS. Do you remember id attributes?
+이것이 끝이 아닙니다. CSS를 덮어쓸 수 있는 다른 방법들이 있습니다. id 속성을 기억하시나요?
 
-Let's override your `pink-text` and `blue-text` classes, and make your `h1` element orange, by giving the `h1` element an id and then styling that id.
+`pink-text` 및 `blue-text`클래스를 덮어쓰고, `h1`요소에 id를 부여한 후 해당 id를 스타일링하여 `h1` 요소를 주황색으로 만듭니다.
 
 # --instructions--
 
-Give your `h1` element the `id` attribute of `orange-text`. Remember, id styles look like this:
+`h1` 요소의 `id` 속성에 `orange-text`를 부여하세요. id 스타일은 다음과 같습니다:
 
 ```html
 <h1 id="orange-text">
 ```
 
-Leave the `blue-text` and `pink-text` classes on your `h1` element.
+`h1`요소에 `blue-text`와 `pink-text`클래스를 남겨두세요.
 
-Create a CSS declaration for your `orange-text` id in your `style` element. Here's an example of what this looks like:
+`style`요소에서 `orange-text` id에 대한 CSS 선언을 작성하세요. 다음은 이것이 어떻게 보이는지에 대한 예제입니다.
 
 ```css
 #brown-text {
@@ -33,47 +33,47 @@ Create a CSS declaration for your `orange-text` id in your `style` element. Here
 }
 ```
 
-**Note:** It doesn't matter whether you declare this CSS above or below `pink-text` class, since the `id` attribute will always take precedence.
+**참고:** 이 CSS선언이 `pink-text`클래스의 위에 선언되었는지, 아래에 선언되었는지와 상관없이 `id` 속성이 항상 우선됩니다.
 
 # --hints--
 
-Your `h1` element should have the class `pink-text`.
+`h1` 요소에는 `pink-text`라는 클래스가 있어야 합니다.
 
 ```js
 assert($('h1').hasClass('pink-text'));
 ```
 
-Your `h1` element should have the class `blue-text`.
+`h1` 요소에는 `blue-text`라는 클래스가 있어야 합니다.
 
 ```js
 assert($('h1').hasClass('blue-text'));
 ```
 
-Your `h1` element should have the id of `orange-text`.
+`h1` 요소는 `orange-text`라는 id를 갖고 있어야 합니다.
 
 ```js
 assert($('h1').attr('id') === 'orange-text');
 ```
 
-There should be only one `h1` element.
+`h1` 요소는 하나만 있어야 합니다.
 
 ```js
 assert($('h1').length === 1);
 ```
 
-Your `orange-text` id should have a CSS declaration.
+`orange-text` id에 대한 CSS 선언이 있어야 합니다.
 
 ```js
 assert(code.match(/#orange-text\s*{/gi));
 ```
 
-Your `h1` should not have any `style` attributes.
+`h1`은 어떠한 `style` 속성도 갖지 않습니다.
 
 ```js
 assert(!code.match(/<h1.*style.*>/gi));
 ```
 
-Your `h1` element should be orange.
+`h1` 요소는 오렌지색이어야 합니다.
 
 ```js
 assert($('h1').css('color') === 'rgb(255, 165, 0)');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-class-declarations-with-inline-styles.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-class-declarations-with-inline-styles.md
index b74bc03043a..4fa4ef5eec4 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-class-declarations-with-inline-styles.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-class-declarations-with-inline-styles.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf06756
-title: Override Class Declarations with Inline Styles
+title: 클래스 선언을 인라인 스타일로 덮어 쓰기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cGJDRha'
 forumTopicId: 18252
@@ -9,47 +9,47 @@ dashedName: override-class-declarations-with-inline-styles
 
 # --description--
 
-So we've proven that id declarations override class declarations, regardless of where they are declared in your `style` element CSS.
+우리는 id 선언이 class 선언을 덮어쓸 수 있다는 것을 증명했습니다. 이는 `style` 요소의 CSS에서 어디에 선언되었는지와 관계없이 적용됩니다.
 
-There are other ways that you can override CSS. Do you remember inline styles?
+CSS를 무시할 수 있는 다른 방법도 있습니다. 인라인 스타일을 기억하시나요?
 
 # --instructions--
 
-Use an inline style to try to make our `h1` element white. Remember, inline styles look like this:
+인라인 스타일을 이용해서 `h1` 요소를 흰색으로 만드세요. 기억하세요. 인라인 스타일은 다음과 같이 만들 수 있습니다.
 
 ```html
 <h1 style="color: green;">
 ```
 
-Leave the `blue-text` and `pink-text` classes on your `h1` element.
+`h1` 요소에 `blue-text` 및 `pink-text` 클래스를 남겨두세요.
 
 # --hints--
 
-Your `h1` element should have the class `pink-text`.
+`h1` 요소는 `pink-text` 클래스를 갖고 있어야 합니다.
 
 ```js
 assert($('h1').hasClass('pink-text'));
 ```
 
-Your `h1` element should have the class `blue-text`.
+`h1` 요소는 `blue-text` 클래스를 갖고 있어야 합니다.
 
 ```js
 assert($('h1').hasClass('blue-text'));
 ```
 
-Your `h1` element should have the id of `orange-text`.
+`h1` 요소는 `orange-text` 라는 id를 갖고 있어야 합니다.
 
 ```js
 assert($('h1').attr('id') === 'orange-text');
 ```
 
-Your `h1` element should have an inline style.
+`h1` 요소는 인라인 스타일을 갖고 있어야 합니다.
 
 ```js
 assert(document.querySelector('h1[style]'));
 ```
 
-Your `h1` element should be white.
+`h1` 요소는 흰색으로 나타나야 합니다.
 
 ```js
 assert($('h1').css('color') === 'rgb(255, 255, 255)');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-styles-in-subsequent-css.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-styles-in-subsequent-css.md
index 5659ee41991..db69df397d5 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-styles-in-subsequent-css.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/override-styles-in-subsequent-css.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf04756
-title: Override Styles in Subsequent CSS
+title: 후속 CSS에서 스타일을 재정의하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cGJDQug'
 forumTopicId: 18253
@@ -9,47 +9,47 @@ dashedName: override-styles-in-subsequent-css
 
 # --description--
 
-Our `pink-text` class overrode our `body` element's CSS declaration!
+우리의 `pink-text` 클래스가 `body` 요소의 CSS 선언을 덮어쓰게 되었습니다!
 
-We just proved that our classes will override the `body` element's CSS. So the next logical question is, what can we do to override our `pink-text` class?
+우리는 방금 클래스가 `body` 요소의 CSS를 덮어쓸 수 있음을 증명했습니다. 그러면 논리적으로 할 수 있는 다음 질문은, `pink-text` 클래스를 덮어쓰기 위해 우리가 할 수 있는 일은 무엇일까요?
 
 # --instructions--
 
-Create an additional CSS class called `blue-text` that gives an element the color blue. Make sure it's below your `pink-text` class declaration.
+요소에 파란색을 지정하는 추가적인 CSS 클래스를 만드세요. 클래스의 이름은 `blue-text`입니다. `pink-text` 클래스 선언 아래에 위치하도록 하세요.
 
-Apply the `blue-text` class to your `h1` element in addition to your `pink-text` class, and let's see which one wins.
+`pink-text` 클래스 외에도 `h1` 요소에 `blue-text` 클래스를 적용하고 이 중 어떤 스타일이 적용될지 확인해보세요.
 
-Applying multiple class attributes to a HTML element is done with a space between them like this:
+HTML 요소에 여러 클래스 속성을 적용하려면 다음과 같이 띄어쓰기로 구분합니다.
 
 ```html
 class="class1 class2"
 ```
 
-**Note:** It doesn't matter which order the classes are listed in the HTML element.
+**참고:** HTML 요소에 클래스를 나열하는 순서는 중요하지 않습니다.
 
-However, the order of the `class` declarations in the `<style>` section is what is important. The second declaration will always take precedence over the first. Because `.blue-text` is declared second, it overrides the attributes of `.pink-text`.
+그러나 `<style>` 섹션의 `class` 선언 순서는 중요합니다. 두 번째 선언이 항상 첫 번째보다 우선합니다. `.blue-text`가 두 번째로 선언되었기 때문에 `.pink-text`의 속성을 덮어씁니다.
 
 # --hints--
 
-Your `h1` element should have the class `pink-text`.
+`h1` 요소는 `pink-text` 클래스를 갖고 있어야 합니다.
 
 ```js
 assert($('h1').hasClass('pink-text'));
 ```
 
-Your `h1` element should have the class `blue-text`.
+`h1` 요소는 `blue-text` 클래스를 갖고 있어야 합니다.
 
 ```js
 assert($('h1').hasClass('blue-text'));
 ```
 
-Both `blue-text` and `pink-text` should belong to the same `h1` element.
+`blue-text` 클래스와 `pink-text` 클래스 모두 `h1`에 속합니다.
 
 ```js
 assert($('.pink-text').hasClass('blue-text'));
 ```
 
-Your `h1` element should be blue.
+`h1` 요소는 파란색으로 나타나야 합니다.
 
 ```js
 assert($('h1').css('color') === 'rgb(0, 0, 255)');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/prioritize-one-style-over-another.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/prioritize-one-style-over-another.md
index 2f040b7d6a6..d78b8bb29f5 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/prioritize-one-style-over-another.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/prioritize-one-style-over-another.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08756
-title: Prioritize One Style Over Another
+title: 다른 스타일보다 한 스타일을 우선하는 방법
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cZ8wnHv'
 forumTopicId: 18258
@@ -9,33 +9,33 @@ dashedName: prioritize-one-style-over-another
 
 # --description--
 
-Sometimes your HTML elements will receive multiple styles that conflict with one another.
+때때로 HTML 요소에는 서로 충돌하는 여러 스타일이 있을 수 있습니다.
 
-For example, your `h1` element can't be both green and pink at the same time.
+예를 들어, 여러분의 `h1` 요소는 동시에 초록색과 분홍색이 될 수 없습니다.
 
-Let's see what happens when we create a class that makes text pink, then apply it to an element. Will our class *override* the `body` element's `color: green;` CSS property?
+핑크색 텍스트를 만드는 클래스를 생성한 다음, 그것을 요소에 적용할 때 어떻게 되는지 살펴봅시다. 우리의 클래스는 `body` 요소의 `color: green;` CSS 속성을 *override*할까요?
 
 # --instructions--
 
-Create a CSS class called `pink-text` that gives an element the color pink.
+요소에 핑크 색상을 지정하는 `pink-text`라는 CSS 클래스를 만드세요.
 
-Give your `h1` element the class of `pink-text`.
+`h1` 요소에 `pink-text` 클래스를 더하세요.
 
 # --hints--
 
-Your `h1` element should have the class `pink-text`.
+`h1` 요소는 `pink-text` 클래스를 갖고 있어야 합니다.
 
 ```js
 assert($('h1').hasClass('pink-text'));
 ```
 
-Your `<style>` should have a `pink-text` CSS class that changes the `color`.
+`<style>`에는 요소의 `color`를 바꾸는 `pink-text` 클래스가 있어야 합니다.
 
 ```js
 assert(code.match(/\.pink-text\s*\{\s*color\s*:\s*.+\s*;?\s*\}/g));
 ```
 
-Your `h1` element should be pink.
+`h1` 요소는 핑크색으로 나타나야 합니다.
 
 ```js
 assert($('h1').css('color') === 'rgb(255, 192, 203)');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/set-the-font-family-of-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/set-the-font-family-of-an-element.md
index 83f4a8e1db8..bd1e1032d26 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/set-the-font-family-of-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/set-the-font-family-of-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aede08807
-title: Set the Font Family of an Element
+title: 요소의 글꼴 패밀리를 설정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c3bvpCg'
 forumTopicId: 18278
@@ -9,9 +9,9 @@ dashedName: set-the-font-family-of-an-element
 
 # --description--
 
-You can set which font an element should use, by using the `font-family` property.
+`font-family` 속성을 사용하여 요소가 사용할 글꼴을 설정할 수 있습니다.
 
-For example, if you wanted to set your `h2` element's font to `sans-serif`, you would use the following CSS:
+예를 들어, `h2` 요소의 글꼴을 `sans-serif`로 설정하려면 다음과 같은 CSS를 사용할 수 있습니다.
 
 ```css
 h2 {
@@ -21,11 +21,11 @@ h2 {
 
 # --instructions--
 
-Make all of your `p` elements use the `monospace` font.
+모든 `p` 요소가 `monospace` 글꼴을 사용하도록 만드세요.
 
 # --hints--
 
-Your `p` elements should use the font `monospace`.
+`p` 요소는 `monospace` 글꼴을 사용해야 합니다.
 
 ```js
 assert(
@@ -101,9 +101,9 @@ assert(
 <h2 class="red-text">CatPhotoApp</h2>
 <main>
   <p class="red-text">Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
-  
+
   <div>
     <p>Things cats love:</p>
     <ul>
@@ -118,7 +118,7 @@ assert(
       <li>other cats</li>
     </ol>
   </div>
-  
+
   <form action="https://freecatphotoapp.com/submit-cat-photo">
     <label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
     <label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/set-the-id-of-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/set-the-id-of-an-element.md
index 88b3ecbc661..aecd3e94ec2 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/set-the-id-of-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/set-the-id-of-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87eee1348bd9aede07836
-title: Set the id of an Element
+title: 요소에 id 지정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cN6MEc2'
 forumTopicId: 18279
@@ -9,13 +9,13 @@ dashedName: set-the-id-of-an-element
 
 # --description--
 
-In addition to classes, each HTML element can also have an `id` attribute.
+클래스 외에도 각 HTML 요소는 `id` 속성을 가질 수 있습니다.
 
-There are several benefits to using `id` attributes: You can use an `id` to style a single element and later you'll learn that you can use them to select and modify specific elements with JavaScript.
+`id` 속성을 사용하는 여러 가지 이점이 있습니다. 하나의 요소에 스타일을 적용하는 데 `id`를 사용할 수 있으며 나중에 JavaScript에서 특정 요소를 선택하고 수정하는 데 사용할 수 있습니다.
 
-`id` attributes should be unique. Browsers won't enforce this, but it is a widely agreed upon best practice. So please don't give more than one element the same `id` attribute.
+`id` 속성은 고유해야 합니다. 브라우저가 이를 강제로 지키게 만들지는 않지만, 광범위하게 합의된 최선의 방법입니다. 따라서 동일한 `id` 속성을 두 개 이상의 요소에 지정하지 마십시오.
 
-Here's an example of how you give your `h2` element the id of `cat-photo-app`:
+여기 `h2` 요소에 `cat-photo-app`이라는 id를 지정하는 방법의 예시가 있습니다.
 
 ```html
 <h2 id="cat-photo-app">
@@ -23,11 +23,11 @@ Here's an example of how you give your `h2` element the id of `cat-photo-app`:
 
 # --instructions--
 
-Give your `form` element the id `cat-photo-form`.
+`form` 요소에 `cat-photo-form`이라는 id를 지정하세요.
 
 # --hints--
 
-Your `form` element should have the id of `cat-photo-form`.
+즉, `form` 요소의 id는 `cat-photo-form`이어야 합니다.
 
 ```js
 assert($('form').attr('id') === 'cat-photo-form');
@@ -139,9 +139,9 @@ assert($('form').attr('id') === 'cat-photo-form');
 <h2 class="red-text">CatPhotoApp</h2>
 <main>
   <p class="red-text">Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img class="smaller-image thick-green-border" src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
-  
+
   <div class="silver-background">
     <p>Things cats love:</p>
     <ul>
@@ -156,7 +156,7 @@ assert($('form').attr('id') === 'cat-photo-form');
       <li>other cats</li>
     </ol>
   </div>
-  
+
   <form action="https://freecatphotoapp.com/submit-cat-photo" id="cat-photo-form">
     <label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
     <label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/size-your-images.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/size-your-images.md
index 403065e0f96..d89effe739b 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/size-your-images.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/size-your-images.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9acdf08812
-title: Size Your Images
+title: 이미지 크기 조절하기
 challengeType: 0
 forumTopicId: 18282
 dashedName: size-your-images
@@ -8,9 +8,9 @@ dashedName: size-your-images
 
 # --description--
 
-CSS has a property called `width` that controls an element's width. Just like with fonts, we'll use `px` (pixels) to specify the image's width.
+CSS에는 `width`라는 요소가 있는데, 이는 요소의 가로 너비를 조정하는 데 사용됩니다. 폰트 크기와 마찬가지로, 이미지의 가로 너비를 정의할 때 `px`(픽셀) 단위를 사용할 것입니다.
 
-For example, if we wanted to create a CSS class called `larger-image` that gave HTML elements a width of 500 pixels, we'd use:
+예를 들어 HTML 요소에 500픽셀의 너비를 부여하는 ` larger-image`라는 CSS 클래스를 만들고 싶다면 다음과 같이 작성하면 됩니다:
 
 ```html
 <style>
@@ -22,11 +22,11 @@ For example, if we wanted to create a CSS class called `larger-image` that gave
 
 # --instructions--
 
-Create a class called `smaller-image` and use it to resize the image so that it's only 100 pixels wide.
+`smaller-image`라는 클래스를 생성하고, 이를 이미지의 크기를 조정하는 데 사용하여 이미지의 너비를 100픽셀로 지정하세요.
 
 # --hints--
 
-Your `img` element should have the class `smaller-image`.
+`img` 요소는 `smaller-image` 라는 클래스를 갖고 있어야 합니다.
 
 ```js
 assert(
@@ -35,7 +35,7 @@ assert(
 );
 ```
 
-Your image should be 100 pixels wide.
+이미지는 가로 너비가 100픽셀이어야 합니다.
 
 ```js
 assert(
@@ -124,9 +124,9 @@ assert(
 <h2 class="red-text">CatPhotoApp</h2>
 <main>
   <p class="red-text">Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img class="smaller-image" src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
-  
+
   <div>
     <p>Things cats love:</p>
     <ul>
@@ -141,7 +141,7 @@ assert(
       <li>other cats</li>
     </ol>
   </div>
-  
+
   <form action="https://freecatphotoapp.com/submit-cat-photo">
     <label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
     <label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/specify-how-fonts-should-degrade.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/specify-how-fonts-should-degrade.md
index 955b5f81a23..0e94065e33d 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/specify-how-fonts-should-degrade.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/specify-how-fonts-should-degrade.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08808
-title: Specify How Fonts Should Degrade
+title: 글꼴이 어떻게 변경되는지 특정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cpVKBfQ'
 forumTopicId: 18304
@@ -9,11 +9,11 @@ dashedName: specify-how-fonts-should-degrade
 
 # --description--
 
-There are several default fonts that are available in all browsers. These generic font families include `monospace`, `serif` and `sans-serif`.
+모든 브라우저에 이용 가능한 여러 디폴트 글꼴이 있습니다. 이러한 일반적인 글꼴로는 `monospace`, `serif` 그리고 `sans-serif`가 있습니다.
 
-When one font isn't available, you can tell the browser to "degrade" to another font.
+한 글꼴이 사용 불가할 때 브라우저에게 다른 글꼴로 대체하라고 지시할 수 있습니다.
 
-For example, if you wanted an element to use the `Helvetica` font, but degrade to the `sans-serif` font when `Helvetica` isn't available, you will specify it as follows:
+예를 들면 요소에 `Helvetica` 글꼴을 주고 싶지만 `Helvetica`가 사용 불가할 때 `sans-serif`로 변경해야 한다면 다음과 같이 정해주면 됩니다.
 
 ```css
 p {
@@ -21,19 +21,19 @@ p {
 }
 ```
 
-Generic font family names are not case-sensitive. Also, they do not need quotes because they are CSS keywords.
+일반적인 글꼴 이름은 대소문자를 구분하지 않습니다. 또한 CSS 키워드이기 때문에 따옴표가 필요하지 않습니다.
 
 # --instructions--
 
-To begin, apply the `monospace` font to the `h2` element, so that it now has two fonts - `Lobster` and `monospace`.
+시작을 위해 `h2` 요소에 `monospace` 글꼴을 주어 `Lobster`와 `monospace`의 두가지 글꼴을 가지도록 만드시오.
 
-In the last challenge, you imported the `Lobster` font using the `link` tag. Now comment out that import of the `Lobster` font (using the HTML comments you learned before) from Google Fonts so that it isn't available anymore. Notice how your `h2` element degrades to the `monospace` font.
+지난 과제에서 `link` 태그를 이용하여 `Lobster` 글꼴을 불러왔습니다. 이제 (이전에 배운 HTML 주석을 사용하여) Google Fonts로부터 `Lobster` 불러온 코드를 주석처리하여 더 이상 사용할 수 없게 만드세요. `h2`가 어떻게 `monospace` 글꼴로 변경되는지 주의깊게 살펴보세요.
 
-**Note:** If you have the `Lobster` font installed on your computer, you won't see the degradation because your browser is able to find the font.
+**주의:** 컴퓨터에 `Lobster` 글꼴이 설치되었다면 브라우저가 해당 글꼴을 찾을 수 있기 때문에 글꼴 변경을 확인할 수 없을 것입니다.
 
 # --hints--
 
-Your h2 element should use the font `Lobster`.
+h2 요소는 `Lobster` 글꼴을 사용해야 합니다.
 
 ```js
 assert(
@@ -43,7 +43,7 @@ assert(
 );
 ```
 
-Your h2 element should degrade to the font `monospace` when `Lobster` is not available.
+h2 요소는 `Lobster`가 이용 불가할 때 `monospace`로 글꼴이 변경되어야 합니다.
 
 ```js
 assert(
@@ -53,13 +53,13 @@ assert(
 );
 ```
 
-You should comment out your call to Google for the `Lobster` font by putting `<!--` in front of it.
+`<!--`을 `Lobster` 앞에 넣어 해당 글꼴을 Google로부터 불러오는 호출을 주석 처리해야 합니다.
 
 ```js
 assert(new RegExp('<!--[^fc]', 'gi').test(code));
 ```
 
-You should close your comment by adding `-->`.
+`-->`를 추가하여 주석을 마무리해야 합니다.
 
 ```js
 assert(new RegExp('[^fc]-->', 'gi').test(code));
@@ -141,9 +141,9 @@ assert(new RegExp('[^fc]-->', 'gi').test(code));
 <h2 class="red-text">CatPhotoApp</h2>
 <main>
   <p class="red-text">Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
-  
+
   <div>
     <p>Things cats love:</p>
     <ul>
@@ -158,7 +158,7 @@ assert(new RegExp('[^fc]-->', 'gi').test(code));
       <li>other cats</li>
     </ol>
   </div>
-  
+
   <form action="https://freecatphotoapp.com/submit-cat-photo">
     <label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
     <label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/style-multiple-elements-with-a-css-class.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/style-multiple-elements-with-a-css-class.md
index d474e349f00..786720b96e1 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/style-multiple-elements-with-a-css-class.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/style-multiple-elements-with-a-css-class.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aefe08806
-title: Style Multiple Elements with a CSS Class
+title: CSS 클래스를 사용하여 여러 요소의 스타일 지정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cRkVbsQ'
 forumTopicId: 18311
@@ -9,29 +9,29 @@ dashedName: style-multiple-elements-with-a-css-class
 
 # --description--
 
-Classes allow you to use the same CSS styles on multiple HTML elements. You can see this by applying your `red-text` class to the first `p` element.
+클래스를 사용하면 여러 HTML 요소에 동일한 CSS 스타일을 사용할 수 있습니다. `red-text` 클래스를 첫번째 `p` 요소에 적용하면 이를 확인할 수 있습니다.
 
 # --hints--
 
-Your `h2` element should be red.
+`h2` 요소는 빨간색이어야 합니다.
 
 ```js
 assert($('h2').css('color') === 'rgb(255, 0, 0)');
 ```
 
-Your `h2` element should have the class `red-text`.
+`h2` 요소는 `red-text` 클래스가 있어야 합니다.
 
 ```js
 assert($('h2').hasClass('red-text'));
 ```
 
-Your first `p` element should be red.
+첫 번째 `p` 요소는 빨간색이어야 합니다.
 
 ```js
 assert($('p:eq(0)').css('color') === 'rgb(255, 0, 0)');
 ```
 
-Your second and third `p` elements should not be red.
+두 번째와 세 번째 `p` 요소는 빨간색이 아니어야 합니다.
 
 ```js
 assert(
@@ -40,7 +40,7 @@ assert(
 );
 ```
 
-Your first `p` element should have the class `red-text`.
+첫 번째 `p` 요소는 `red-text` 클래스가 있어야 합니다.
 
 ```js
 assert($('p:eq(0)').hasClass('red-text'));
@@ -102,9 +102,9 @@ assert($('p:eq(0)').hasClass('red-text'));
 <h2 class="red-text">CatPhotoApp</h2>
 <main>
   <p class="red-text">Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
-  
+
   <div>
     <p>Things cats love:</p>
     <ul>
@@ -119,7 +119,7 @@ assert($('p:eq(0)').hasClass('red-text'));
       <li>other cats</li>
     </ol>
   </div>
-  
+
   <form action="https://freecatphotoapp.com/submit-cat-photo">
     <label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
     <label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/style-the-html-body-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/style-the-html-body-element.md
index 26a469c1d1d..5a316b8a391 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/style-the-html-body-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/style-the-html-body-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08736
-title: Style the HTML Body Element
+title: HTML body 요소에 스타일 더하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cB77PHW'
 forumTopicId: 18313
@@ -9,15 +9,15 @@ dashedName: style-the-html-body-element
 
 # --description--
 
-Now let's start fresh and talk about CSS inheritance.
+이제 다시 시작하여 CSS 상속에 대해 이야기해 봅시다.
 
-Every HTML page has a `body` element.
+모든 HTML 페이지에는 `body` 요소가 있습니다.
 
 # --instructions--
 
-We can prove that the `body` element exists here by giving it a `background-color` of black.
+여기서 `body` 요소가 존재하는 것을 검증하기 위해 여기에 검은색 `background-color`을 지정할 수 있습니다.
 
-We can do this by adding the following to our `style` element:
+이를 위해 다음을 `style` 요소에 추가할 수 있습니다.
 
 ```css
 body {
@@ -27,13 +27,13 @@ body {
 
 # --hints--
 
-Your `body` element should have the `background-color` of black.
+`body` 요소는 검은색 `background-color`을 가져야 합니다.
 
 ```js
 assert($('body').css('background-color') === 'rgb(0, 0, 0)');
 ```
 
-Your CSS rule should be properly formatted with both opening and closing curly brackets.
+CSS 규칙은 올바른 형식으로 여는 중괄호와 닫는 중괄호를 가져야 합니다.
 
 ```js
 assert(
@@ -41,7 +41,7 @@ assert(
 );
 ```
 
-Your CSS rule should end with a semi-colon.
+CSS 규칙은 세미콜론으로 끝나야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/understand-absolute-versus-relative-units.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/understand-absolute-versus-relative-units.md
index f9e32b8b401..d03daf8adc2 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/understand-absolute-versus-relative-units.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/understand-absolute-versus-relative-units.md
@@ -1,6 +1,6 @@
 ---
 id: bad82fee1322bd9aedf08721
-title: Understand Absolute versus Relative Units
+title: 절대 단위와 상대 단위 이해하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cN66JSL'
 forumTopicId: 301089
@@ -9,21 +9,21 @@ dashedName: understand-absolute-versus-relative-units
 
 # --description--
 
-The last several challenges all set an element's margin or padding with pixels (`px`). Pixels are a type of length unit, which is what tells the browser how to size or space an item. In addition to `px`, CSS has a number of different length unit options that you can use.
+마지막 여러 도전에서는 요소의 마진(margin) 또는 패딩(padding)을 픽셀(`px`)로 설정했습니다. 픽셀은 브라우저에 항목의 크기 또는 간격을 알려주는 길이 단위의 한 유형입니다. `px` 외에도 CSS에는 사용할 수 있는 여러 다양한 길이 단위 옵션이 있습니다.
 
-The two main types of length units are absolute and relative. Absolute units tie to physical units of length. For example, `in` and `mm` refer to inches and millimeters, respectively. Absolute length units approximate the actual measurement on a screen, but there are some differences depending on a screen's resolution.
+길이 단위의 주요 두 유형은 절대 단위와 상대 단위입니다. 절대 단위는 길이의 물리적 단위에 결합됩니다. 예를 들어, `in`은 인치를, `mm`은 밀리미터를 나타냅니다. 절대 길이 단위는 화면상의 실제 측정을 근사화하지만, 화면의 해상도에 따라 몇 가지 차이가 있을 수 있습니다.
 
-Relative units, such as `em` or `rem`, are relative to another length value. For example, `em` is based on the size of an element's font. If you use it to set the `font-size` property itself, it's relative to the parent's `font-size`.
+`em`이나 `rem`과 같은 상대 단위는 다른 길이 값과 관련이 있습니다. 예를 들어, `em`은 요소의 글꼴 크기를 기준으로 합니다. 이것을 사용하여 `font-size` 속성 자체를 설정하면 부모의 `font-size`에 상대적인 크기가 됩니다.
 
-**Note:** There are several relative unit options that are tied to the size of the viewport. They are covered in the Responsive Web Design Principles section.
+**참고:** 뷰포트 크기에 관련된 여러 상대 단위 옵션이 있습니다. 그에 관해서는 반응형 웹 디자인 원칙 섹션에서 다루고 있습니다.
 
 # --instructions--
 
-Add a `padding` property to the element with class `red-box` and set it to `1.5em`.
+클래스가 `red-box`인 요소에 `padding` 속성을 추가하고 값을 `1.5em`으로 설정하세요.
 
 # --hints--
 
-Your `red-box` class should have a `padding` property.
+`red-box` 클래스는 `padding` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -34,7 +34,7 @@ assert(
 );
 ```
 
-Your `red-box` class should give elements 1.5em of `padding`.
+`red-box` 클래스는 요소에 1.5em의 `padding`을 지정해야 합니다.
 
 ```js
 assert(code.match(/\.red-box\s*?{[\s\S]*padding\s*:\s*?1\.5em/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-a-css-class-to-style-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-a-css-class-to-style-an-element.md
index 4fbfab5018c..d7e52c921d4 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-a-css-class-to-style-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-a-css-class-to-style-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aecf08806
-title: Use a CSS Class to Style an Element
+title: CSS 클래스를 사용하여 요소에 스타일을 적용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c2MvDtV'
 forumTopicId: 18337
@@ -9,9 +9,9 @@ dashedName: use-a-css-class-to-style-an-element
 
 # --description--
 
-Classes are reusable styles that can be added to HTML elements.
+클래스는 HTML 요소에 추가할 수 있는 재사용 가능한 스타일입니다.
 
-Here's an example CSS class declaration:
+다음은 CSS 클래스 선언의 예시입니다.
 
 ```html
 <style>
@@ -21,35 +21,35 @@ Here's an example CSS class declaration:
 </style>
 ```
 
-You can see that we've created a CSS class called `blue-text` within the `<style>` tag. You can apply a class to an HTML element like this: `<h2 class="blue-text">CatPhotoApp</h2>`. Note that in your CSS `style` element, class names start with a period. In your HTML elements' class attribute, the class name does not include the period.
+코드에서 볼 수 있듯이 `<style>` 태그 내에서 `blue-text`라는 CSS 클래스를 생성했습니다. 다음과 같이 HTML 요소에 클래스를 적용할 수 있습니다: `<h2 class="blue-text">CatPhotoApp</h2>`. CSS의 `style` 요소에서 클래스 이름은 점(.)으로 시작합니다. 그러나 HTML 요소의 클래스 속성에서는 클래스 이름에 점이 포함되지 않습니다.
 
 # --instructions--
 
-Inside your `style` element, change the `h2` selector to `.red-text` and update the color's value from `blue` to `red`.
+`style` 요소 내에서 `h2` 선택자를 `.red-text`로 변경하고 색상 값을 `blue`에서 `red`로 바꾸세요.
 
-Give your `h2` element the `class` attribute with a value of `red-text`.
+`h2` 요소에 `class` 속성을 `red-text`로 설정하세요.
 
 # --hints--
 
-Your `h2` element should be red.
+`h2` 요소는 빨간색이어야 합니다.
 
 ```js
 assert($('h2').css('color') === 'rgb(255, 0, 0)');
 ```
 
-Your `h2` element should have the class `red-text`.
+`h2` 요소는 `red-text`라는 클래스를 가져야 합니다.
 
 ```js
 assert($('h2').hasClass('red-text'));
 ```
 
-Your stylesheet should declare a `red-text` class and have its color set to `red`.
+스타일시트에 `red-text` 클래스를 선언하고 그 색상이 `red`로 설정되어 있어야 합니다.
 
 ```js
 assert(code.match(/\.red-text\s*\{\s*color\s*:\s*red;?\s*\}/g));
 ```
 
-You should not use inline style declarations like `style="color: red"` in your `h2` element.
+`h2` 요소에서 `style="color: red"`와 같은 인라인 스타일 선언을 사용해서는 안 됩니다.
 
 ```js
 assert($('h2').attr('style') === undefined);
@@ -111,9 +111,9 @@ assert($('h2').attr('style') === undefined);
 <h2 class="red-text">CatPhotoApp</h2>
 <main>
   <p>Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
-  
+
   <div>
     <p>Things cats love:</p>
     <ul>
@@ -128,7 +128,7 @@ assert($('h2').attr('style') === undefined);
       <li>other cats</li>
     </ol>
   </div>
-  
+
   <form action="https://freecatphotoapp.com/submit-cat-photo">
     <label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
     <label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-a-custom-css-variable.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-a-custom-css-variable.md
index fca17c44c68..010c420d04d 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-a-custom-css-variable.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-a-custom-css-variable.md
@@ -1,6 +1,6 @@
 ---
 id: 5a9d727a424fe3d0e10cad12
-title: Use a custom CSS Variable
+title: 커스텀 CSS 변수 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cM989ck'
 forumTopicId: 301090
@@ -9,21 +9,21 @@ dashedName: use-a-custom-css-variable
 
 # --description--
 
-After you create your variable, you can assign its value to other CSS properties by referencing the name you gave it.
+변수를 생성한 후 이 변수의 이름을 참조하여 다른 CSS 속성에 해당 값을 할당할 수 있습니다.
 
 ```css
 background: var(--penguin-skin);
 ```
 
-This will change the background of whatever element you are targeting to gray because that is the value of the `--penguin-skin` variable. Note that styles will not be applied unless the variable names are an exact match.
+이것은 `--penguin-skin` 변수의 값이 회색이기 때문에 대상으로 하는 요소의 배경을 회색으로 변경할 것입니다. 변수의 이름이 완전하게 일치하지 않으면 스타일이 적용되지 않을 것입니다.
 
 # --instructions--
 
-Apply the `--penguin-skin` variable to the `background` property of the `penguin-top`, `penguin-bottom`, `right-hand` and `left-hand` classes.
+`penguin-top`, `penguin-bottom`, `right-hand` 그리고 `left-hand` 클래스의 `background` 속성에 `--penguin-skin` 변수를 적용하세요.
 
 # --hints--
 
-The `--penguin-skin` variable should be applied to the `background` property of the `penguin-top` class.
+`--penguin-skin` 변수는 `penguin-top` 클래스의 `background` 속성에 적용되어야 합니다.
 
 ```js
 assert(
@@ -33,7 +33,7 @@ assert(
 );
 ```
 
-The `--penguin-skin` variable should be applied to the `background` property of the `penguin-bottom` class.
+`--penguin-skin` 변수는 `penguin-bottom` 클래스의 `background` 속성에 적용되어야 합니다.
 
 ```js
 assert(
@@ -43,7 +43,7 @@ assert(
 );
 ```
 
-The `--penguin-skin` variable should be applied to the `background` property of the `right-hand` class.
+`--penguin-skin` 변수는 `right-hand` 클래스의 `background` 속성에 적용되어야 합니다.
 
 ```js
 assert(
@@ -53,7 +53,7 @@ assert(
 );
 ```
 
-The `--penguin-skin` variable should be applied to the `background` property of the `left-hand` class.
+`--penguin-skin` 변수는 `left-hand` 클래스의 `background` 속성에 적용되어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-a-media-query-to-change-a-variable.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-a-media-query-to-change-a-variable.md
index 0402ad0782c..ec92d95098f 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-a-media-query-to-change-a-variable.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-a-media-query-to-change-a-variable.md
@@ -1,6 +1,6 @@
 ---
 id: 5a9d72ad424fe3d0e10cad16
-title: Use a media query to change a variable
+title: 변수 변환하기 위한 미디어 쿼리 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cWmL8UP'
 forumTopicId: 301091
@@ -9,17 +9,17 @@ dashedName: use-a-media-query-to-change-a-variable
 
 # --description--
 
-CSS Variables can simplify the way you use media queries.
+CSS 변수는 미디어 쿼리를 사용하는 방법을 간소화시킬 수 있습니다.
 
-For instance, when your screen is smaller or larger than your media query break point, you can change the value of a variable, and it will apply its style wherever it is used.
+예를 들면, 화면이 미디어 쿼리 변환점보다 작거나 클 때 변수의 값을 바꿀 수 있으며 변수가 사용되는 모든 곳에 그 스타일이 적용될 것입니다.
 
 # --instructions--
 
-In the `:root` selector of the media query, change it so `--penguin-size` is redefined and given a value of `200px`. Also, redefine `--penguin-skin` and give it a value of `black`. Then resize the preview to see this change in action.
+미디어 쿼리의 `:root` 셀렉터에서 `--penguin-size`을 재정의하고 값을 `200px`로 변환하세요. 또한 `--penguin-skin`을 재정의하고 `black` 값을 주세요. 그런 다음 변화 확인을 위해 미리보기 크기를 조정해보세요.
 
 # --hints--
 
-`:root` should reassign the `--penguin-size` variable to `200px`.
+`:root`는 `--penguin-size` 변수에 `200px`을 재할당해야 합니다.
 
 ```js
 assert(
@@ -29,7 +29,7 @@ assert(
 );
 ```
 
-`:root` should reassign the `--penguin-skin` variable to `black`.
+`:root`는 `--penguin-skin` 변수에 `black`를 재할당해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-abbreviated-hex-code.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-abbreviated-hex-code.md
index 7b12f11f092..56dbeeb1571 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-abbreviated-hex-code.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-abbreviated-hex-code.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08719
-title: Use Abbreviated Hex Code
+title: 헥스 코드 축약형 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cRkpKAm'
 forumTopicId: 18338
@@ -9,63 +9,63 @@ dashedName: use-abbreviated-hex-code
 
 # --description--
 
-Many people feel overwhelmed by the possibilities of more than 16 million colors. And it's difficult to remember hex code. Fortunately, you can shorten it.
+많은 사람들이 1,600만 가지가 넘는 색상의 가능성에 망연자실합니다. 게다가 헥스 코드는 외우기 어렵지요. 다행히도 축약해서 쓰는 것이 가능합니다.
 
-For example, red's hex code `#FF0000` can be shortened to `#F00`. This shortened form gives one digit for red, one digit for green, and one digit for blue.
+예를 들어 빨간색의 헥스 코드인 `#FF0000`는 `#F00`로 줄여 쓸 수 있습니다. 이 축약형에서는 빨간색에 한 자리, 초록색에 한 자리, 파란색에 한 자리가 주어집니다.
 
-This reduces the total number of possible colors to around 4,000. But browsers will interpret `#FF0000` and `#F00` as exactly the same color.
+이렇게 하면 가능한 색상의 총 가짓수가 약 4,000개로 줄어듭니다. 하지만 브라우저는 `#FF0000`와 `#F00`를 완전히 동일한 색상으로 인식합니다.
 
 # --instructions--
 
-Go ahead, try using the abbreviated hex codes to color the correct elements.
+자 이제, 헥스 코드의 축약형을 사용하여 올바른 요소에 색상을 지정해 보십시오.
 
-<table><tbody><tr><th>Color</th><th>Short Hex Code</th></tr><tr><td>Cyan</td><td><code>#0FF</code></td></tr><tr><td>Green</td><td><code>#0F0</code></td></tr><tr><td>Red</td><td><code>#F00</code></td></tr><tr><td>Fuchsia</td><td><code>#F0F</code></td></tr></tbody></table>
+<table><tbody><tr><th>색상</th><th>헥스 코드 축약형</th></tr><tr><td>청록색(cyan)</td><td><code>#0FF</code></td></tr><tr><td>초록색</td><td><code>#0F0</code></td></tr><tr><td>빨간색</td><td><code>#F00</code></td></tr><tr><td>자홍색(Fuchsia)</td><td><code>#F0F</code></td></tr></tbody></table>
 
 # --hints--
 
-Your `h1` element with the text `I am red!` should be given the `color` red.
+`I am red!`라는 텍스트가 있는 `h1` 요소의 `color`는 빨간색이어야 합니다.
 
 ```js
 assert($('.red-text').css('color') === 'rgb(255, 0, 0)');
 ```
 
-The abbreviated hex code for the color red should be used instead of the hex code `#FF0000`.
+헥스 코드 `#FF0000` 대신 빨간색 헥스 코드의 축약형을 사용해야 합니다.
 
 ```js
 assert(code.match(/\.red-text\s*?{\s*?color\s*:\s*?#F00\s*?;?\s*?}/gi));
 ```
 
-Your `h1` element with the text `I am green!` should be given the `color` green.
+`I am green!`이라는 텍스트가 있는 `h1` 요소의 `color`는 초록색이어야 합니다.
 
 ```js
 assert($('.green-text').css('color') === 'rgb(0, 255, 0)');
 ```
 
-The abbreviated hex code for the color green should be used instead of the hex code `#00FF00`.
+헥스 코드 `#00FF00` 대신 초록색 헥스 코드의 축약형을 사용해야 합니다.
 
 ```js
 assert(code.match(/\.green-text\s*?{\s*?color\s*:\s*?#0F0\s*?;?\s*?}/gi));
 ```
 
-Your `h1` element with the text `I am cyan!` should be given the `color` cyan.
+`I am cyan!`이라는 텍스트가 있는 `h1` 요소의 `color`는 청록색(cyan)이어야 합니다.
 
 ```js
 assert($('.cyan-text').css('color') === 'rgb(0, 255, 255)');
 ```
 
-The abbreviated hex code for the color cyan should be used instead of the hex code `#00FFFF`.
+헥스 코드 `#00FFFF` 대신 청록색(cyan) 헥스 코드의 축약형을 사용해야 합니다.
 
 ```js
 assert(code.match(/\.cyan-text\s*?{\s*?color\s*:\s*?#0FF\s*?;?\s*?}/gi));
 ```
 
-Your `h1` element with the text `I am fuchsia!` should be given the `color` fuchsia.
+`I am fuchsia!`라는 텍스트가 있는 `h1` 요소의 `color`는 자홍색(fuchsia)이어야 합니다.
 
 ```js
 assert($('.fuchsia-text').css('color') === 'rgb(255, 0, 255)');
 ```
 
-The abbreviated hex code for the color fuchsia should be used instead of the hex code `#FF00FF`.
+헥스 코드 `#FF00FF` 대신 자홍색(fuchsia) 헥스 코드의 축약형을 사용해야 합니다.
 
 ```js
 assert(code.match(/\.fuchsia-text\s*?{\s*?color\s*:\s*?#F0F\s*?;?\s*?}/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-an-id-attribute-to-style-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-an-id-attribute-to-style-an-element.md
index edb06ec2ec8..edf2f88d100 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-an-id-attribute-to-style-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-an-id-attribute-to-style-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87dee1348bd9aede07836
-title: Use an id Attribute to Style an Element
+title: id 속성을 사용해서 요소를 스타일링하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cakyZfL'
 forumTopicId: 18339
@@ -9,11 +9,11 @@ dashedName: use-an-id-attribute-to-style-an-element
 
 # --description--
 
-One cool thing about `id` attributes is that, like classes, you can style them using CSS.
+`id` 속성의 멋진 점은 클래스와 마찬가지로 CSS를 사용하여 스타일을 지정할 수 있다는 것입니다.
 
-However, an `id` is not reusable and should only be applied to one element. An `id` also has a higher specificity (importance) than a class so if both are applied to the same element and have conflicting styles, the styles of the `id` will be applied.
+그러나 `id`는 재사용할 수 없으며 하나의 요소에만 적용해야 합니다. `id`는 클래스보다 높은 특수성(중요도) 을 갖기 때문에 동일한 요소에 두 가지가 모두 적용되고 충돌하는 스타일이 있는 경우 `id`의 스타일이 적용됩니다.
 
-Here's an example of how you can take your element with the `id` attribute of `cat-photo-element` and give it the background color of green. In your `style` element:
+다음은 `cat-photo-element`라는 `id` 속성을 가진 요소를 가져와 배경 색상을 초록색으로 지정하는 방법의 예입니다. `style` 요소에서 다음과 같이 작성하세요.
 
 ```css
 #cat-photo-element {
@@ -21,27 +21,27 @@ Here's an example of how you can take your element with the `id` attribute of `c
 }
 ```
 
-Note that inside your `style` element, you always reference classes by putting a `.` in front of their names. You always reference ids by putting a `#` in front of their names.
+`style` 요소 내에서 클래스를 참조할 때 항상 이름 앞에 `.`을 넣어야 함을 유의하세요. id 를 참조할 때 항상 이름 앞에 `#`을 넣습니다.
 
 # --instructions--
 
-Try giving your form, which now has the `id` attribute of `cat-photo-form`, a green background.
+이제 `id` 속성이 `cat-photo-form`인 양식에 초록색 배경을 지정해 보세요.
 
 # --hints--
 
-Your `form` element should have the id of `cat-photo-form`.
+`form` 요소는 `cat-photo-form`라는 id를 가져야 합니다.
 
 ```js
 assert($('form').attr('id') === 'cat-photo-form');
 ```
 
-Your `form` element should have the `background-color` of green.
+`form` 요소는 초록색의 `background-color`를 가져야 합니다.
 
 ```js
 assert($('#cat-photo-form').css('background-color') === 'rgb(0, 128, 0)');
 ```
 
-Your `form` element should have an `id` attribute.
+`form` 요소는 `id` 속성을 갖고 있어야 합니다.
 
 ```js
 assert(
@@ -50,7 +50,7 @@ assert(
 );
 ```
 
-You should not give your `form` any `class` or `style` attributes.
+`form` 요소에는 `class` 또는 `style` 속성을 지정하지 않아야 합니다.
 
 ```js
 assert(!code.match(/<form.*style.*>/gi) && !code.match(/<form.*class.*>/gi));
@@ -166,9 +166,9 @@ assert(!code.match(/<form.*style.*>/gi) && !code.match(/<form.*class.*>/gi));
 <h2 class="red-text">CatPhotoApp</h2>
 <main>
   <p class="red-text">Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img class="smaller-image thick-green-border" src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
-  
+
   <div class="silver-background">
     <p>Things cats love:</p>
     <ul>
@@ -183,7 +183,7 @@ assert(!code.match(/<form.*style.*>/gi) && !code.match(/<form.*class.*>/gi));
       <li>other cats</li>
     </ol>
   </div>
-  
+
   <form action="https://freecatphotoapp.com/submit-cat-photo" id="cat-photo-form">
     <label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
     <label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-attribute-selectors-to-style-elements.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-attribute-selectors-to-style-elements.md
index 50de46dd43f..eae72023951 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-attribute-selectors-to-style-elements.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-attribute-selectors-to-style-elements.md
@@ -1,6 +1,6 @@
 ---
 id: 58c383d33e2e3259241f3076
-title: Use Attribute Selectors to Style Elements
+title: 속성 선택자를 사용하여 요소에 스타일을 지정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cnpymfJ'
 forumTopicId: 301092
@@ -9,11 +9,11 @@ dashedName: use-attribute-selectors-to-style-elements
 
 # --description--
 
-You have been adding `id` or `class` attributes to elements that you wish to specifically style. These are known as ID and class selectors. There are other CSS Selectors you can use to select custom groups of elements to style.
+지금까지 우리는 스타일을 지정하려는 요소에 `id` 또는 `class` 속성을 추가했습니다. 이러한 것들은 ID 및 클래스 선택자로 알려져 있습니다. 스타일을 지정할 사용자 지정 요소 그룹을 선택하는 데 사용할 수 있는 다른 CSS 선택자도 있습니다.
 
-Let's bring out CatPhotoApp again to practice using CSS Selectors.
+다시 한 번 CatPhotoApp에 CSS 선택자 사용을 연습해 봅시다.
 
-For this challenge, you will use the `[attr=value]` attribute selector to style the checkboxes in CatPhotoApp. This selector matches and styles elements with a specific attribute value. For example, the below code changes the margins of all elements with the attribute `type` and a corresponding value of `radio`:
+이 도전에서는 `[attr=value]` 속성 선택자를 사용하여 CatPhotoApp의 체크박스에 스타일을 지정합니다. 이 선택자는 특정 속성 값이 있는 요소에 스타일을 지정합니다. 예를 들어 아래 코드는 `type` 속성의 해당 값이 `radio`인 모든 요소의 마진을 변경합니다.
 
 ```css
 [type='radio'] {
@@ -23,11 +23,11 @@ For this challenge, you will use the `[attr=value]` attribute selector to style
 
 # --instructions--
 
-Using the `type` attribute selector, try to give the checkboxes in CatPhotoApp a top margin of 10px and a bottom margin of 15px.
+`type` 속성 선택자를 사용하여 CatPhotoApp의 체크박스에 상단 마진 10px 및 하단 마진 15px를 지정해 보세요.
 
 # --hints--
 
-The `type` attribute selector should be used to select the checkboxes.
+체크박스를 선택하기 위해 `type` 속성 선택자를 사용해야 합니다.
 
 ```js
 assert(
@@ -37,7 +37,7 @@ assert(
 );
 ```
 
-The top margins of the checkboxes should be 10px.
+체크박스의 상단 마진은 10px 이어야 합니다.
 
 ```js
 assert(
@@ -53,7 +53,7 @@ assert(
 );
 ```
 
-The bottom margins of the checkboxes should be 15px.
+체크박스의 하단 마진은 15px 이어야 합니다.
 
 ```js
 assert(
@@ -179,9 +179,9 @@ assert(
 <h2 class="red-text">CatPhotoApp</h2>
 <main>
   <p class="red-text">Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img class="smaller-image thick-green-border" src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
-  
+
   <div class="silver-background">
     <p>Things cats love:</p>
     <ul>
@@ -196,7 +196,7 @@ assert(
       <li>other cats</li>
     </ol>
   </div>
-  
+
   <form action="https://freecatphotoapp.com/submit-cat-photo" id="cat-photo-form">
     <label><input type="radio" name="indoor-outdoor" checked> Indoor</label>
     <label><input type="radio" name="indoor-outdoor"> Outdoor</label><br>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-clockwise-notation-to-specify-the-margin-of-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-clockwise-notation-to-specify-the-margin-of-an-element.md
index 00c60af5418..4364a9e4f17 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-clockwise-notation-to-specify-the-margin-of-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-clockwise-notation-to-specify-the-margin-of-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9afdf08726
-title: Use Clockwise Notation to Specify the Margin of an Element
+title: 시계 방향 표기법(clockwise notation)을 사용하여 요소의 마진을 지정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cnpybAd'
 forumTopicId: 18345
@@ -9,47 +9,47 @@ dashedName: use-clockwise-notation-to-specify-the-margin-of-an-element
 
 # --description--
 
-Let's try this again, but with `margin` this time.
+이번에는 `margin`을 사용해 봅시다.
 
-Instead of specifying an element's `margin-top`, `margin-right`, `margin-bottom`, and `margin-left` properties individually, you can specify them all in one line, like this:
+요소의 `margin-top`, `margin-right`, `margin-bottom`, `margin-left` 속성을 개별적으로 지정하는 대신 다음과 같이 한 줄에 모두 지정할 수 있습니다.
 
 ```css
 margin: 10px 20px 10px 20px;
 ```
 
-These four values work like a clock: top, right, bottom, left, and will produce the exact same result as using the side-specific margin instructions.
+이 네 가지 값은 시계처럼 작동하여 위, 오른쪽, 아래, 왼쪽 순서로 동작하며, 각 면에 마진 지시 사항을 사용하는 것과 정확히 같은 결과를 만듭니다.
 
 # --instructions--
 
-Use Clockwise Notation to give the element with the `blue-box` class a margin of `40px` on its top and left side, but only `20px` on its bottom and right side.
+시계 방향 표기법을 사용하여 `blue-box` 클래스가 있는 요소에 상단과 왼쪽에는 `40px`, 하단과 오른쪽에는 `20px`의 여백을 지정해보세요.
 
 # --hints--
 
-Your `blue-box` class should give the top of elements `40px` of `margin`.
+`blue-box` 클래스는 요소의 상단에 `40px`의 `margin`을 주어야 합니다.
 
 ```js
 assert($('.blue-box').css('margin-top') === '40px');
 ```
 
-Your `blue-box` class should give the right of elements `20px` of `margin`.
+`blue-box` 클래스는 요소의 오른쪽에 `20px`의 `margin`을 주어야 합니다.
 
 ```js
 assert($('.blue-box').css('margin-right') === '20px');
 ```
 
-Your `blue-box` class should give the bottom of elements `20px` of `margin`.
+`blue-box` 클래스는 요소의 하단에 `20px`의 `margin`을 주어야 합니다.
 
 ```js
 assert($('.blue-box').css('margin-bottom') === '20px');
 ```
 
-Your `blue-box` class should give the left of elements `40px` of `margin`.
+`blue-box` 클래스는 요소의 왼쪽에 `40px`의 `margin`을 주어야 합니다.
 
 ```js
 assert($('.blue-box').css('margin-left') === '40px');
 ```
 
-You should use the clockwise notation to set the margin of `blue-box` class.
+시계 방향 표기법을 사용하여 `blue-box` 클래스의 마진을 설정해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-clockwise-notation-to-specify-the-padding-of-an-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-clockwise-notation-to-specify-the-padding-of-an-element.md
index 569d65f3b98..1e3cc22bb11 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-clockwise-notation-to-specify-the-padding-of-an-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-clockwise-notation-to-specify-the-padding-of-an-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08826
-title: Use Clockwise Notation to Specify the Padding of an Element
+title: 시계 방향 표기법을 사용하여 요소에 패딩을 지정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cB7mBS9'
 forumTopicId: 18346
@@ -9,45 +9,45 @@ dashedName: use-clockwise-notation-to-specify-the-padding-of-an-element
 
 # --description--
 
-Instead of specifying an element's `padding-top`, `padding-right`, `padding-bottom`, and `padding-left` properties individually, you can specify them all in one line, like this:
+요소의 `padding-top`, `padding-right`, `padding-bottom`, `padding-left` 속성을 개별적으로 지정하는 대신 다음과 같이 한 줄에 모두 지정할 수 있습니다.
 
 ```css
 padding: 10px 20px 10px 20px;
 ```
 
-These four values work like a clock: top, right, bottom, left, and will produce the exact same result as using the side-specific padding instructions.
+이 네 가지 값은 시계처럼 작동하여 위, 오른쪽, 아래, 왼쪽의 순서대로 동작하며, 각 면에 패딩 지시 사항을 사용하는 것과 정확히 동일한 결과를 생성합니다.
 
 # --instructions--
 
-Use Clockwise Notation to give the `.blue-box` class a `padding` of `40px` on its top and left side, but only `20px` on its bottom and right side.
+시계 방향 표기법을 사용하여 `.blue-box` 클래스가 있는 요소에 상단과 왼쪽에는 `40px`, 하단과 오른쪽에는 `20px`의 `padding`을 지정해보세요.
 
 # --hints--
 
-Your `blue-box` class should give the top of elements `40px` of `padding`.
+`blue-box` 클래스는 요소의 상단에 `40px`의 `padding`을 주어야 합니다.
 
 ```js
 assert($('.blue-box').css('padding-top') === '40px');
 ```
 
-Your `blue-box` class should give the right of elements `20px` of `padding`.
+`blue-box` 클래스는 요소의 오른쪽에 `20px`의 `padding`을 주어야 합니다.
 
 ```js
 assert($('.blue-box').css('padding-right') === '20px');
 ```
 
-Your `blue-box` class should give the bottom of elements `20px` of `padding`.
+`blue-box` 클래스는 요소의 하단에 `20px`의 `padding`을 주어야 합니다.
 
 ```js
 assert($('.blue-box').css('padding-bottom') === '20px');
 ```
 
-Your `blue-box` class should give the left of elements `40px` of `padding`.
+`blue-box` 클래스는 요소의 왼쪽에 `40px`의 `padding`을 주어야 합니다.
 
 ```js
 assert($('.blue-box').css('padding-left') === '40px');
 ```
 
-You should use the clockwise notation to set the padding of `blue-box` class.
+시계 방향 표기법을 사용하여 `blue-box` 클래스의 패딩을 설정해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-css-selectors-to-style-elements.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-css-selectors-to-style-elements.md
index a56e9494f24..f2f8e3a9abc 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-css-selectors-to-style-elements.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-css-selectors-to-style-elements.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08805
-title: Use CSS Selectors to Style Elements
+title: CSS 선택자를 사용하여 요소를 스타일링하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cJKMBT2'
 forumTopicId: 18349
@@ -9,20 +9,20 @@ dashedName: use-css-selectors-to-style-elements
 
 # --description--
 
-With CSS, there are hundreds of CSS properties that you can use to change the way an element looks on your page.
+페이지에서 요소가 보이는 방식을 변경할 수 있는 수백 가지의 CSS 속성이 있습니다.
 
-When you entered `<h2 style="color: red;">CatPhotoApp</h2>`, you were styling that individual `h2` element with inline CSS, which stands for Cascading Style Sheets.
+`<h2 style="color: red;">CatPhotoApp</h2>`를 입력했을 때는 해당 개별 `h2` 요소에 인라인 CSS(캐스케이딩 스타일 시트)를 사용하여 스타일을 지정한 것입니다.
 
-That's one way to specify the style of an element, but there's a better way to apply CSS.
+이것은 요소의 스타일을 지정할 수 있는 하나의 방법이지만 CSS를 적용하는 더 나은 방법이 있습니다.
 
-At the top of your code, create a `style` block like this:
+코드 맨 위에 다음과 같은 `style` 블록을 만드세요.
 
 ```html
 <style>
 </style>
 ```
 
-Inside that style block, you can create a <dfn>CSS selector</dfn> for all `h2` elements. For example, if you wanted all `h2` elements to be red, you would add a style rule that looks like this:
+이 스타일 블록 내에서 모든 `h2` 요소를 선택하기 위한 <dfn>CSS selector</dfn>를 만들 수 있습니다. 예를 들어 모든 `h2` 요소를 빨간색으로 만들고 싶다면 다음과 같은 스타일 규칙을 추가하면 됩니다.
 
 ```html
 <style>
@@ -32,39 +32,39 @@ Inside that style block, you can create a <dfn>CSS selector</dfn> for all `h2` e
 </style>
 ```
 
-Note that it's important to have both opening and closing curly braces (`{` and `}`) around each element's style rule(s). You also need to make sure that your element's style definition is between the opening and closing style tags. Finally, be sure to add a semicolon to the end of each of your element's style rules.
+중요한 점은 각 요소의 스타일 규칙 주위에 여는 중괄호(`{`)와 닫는 중괄호(`}`)가 있어야 한다는 것입니다. 또한 요소의 스타일 정의가 여는 및 닫는 스타일 태그 사이에 위치해야 합니다. 마지막으로 각 요소의 스타일 규칙 끝에 세미콜론을 추가하세요.
 
 # --instructions--
 
-Delete your `h2` element's style attribute, and instead create a CSS `style` block. Add the necessary CSS to turn all `h2` elements blue.
+`h2` 요소의 스타일 속성을 삭제하고 대신 CSS `style` 블록을 만들어야 합니다. 모든 `h2` 요소를 파란색으로 변경하기 위해 필요한 CSS를 추가하세요.
 
 # --hints--
 
-The `style` attribute should be removed from your `h2` element.
+`h2` 요소의 `style` 속성을 제거해야 합니다.
 
 ```js
 assert(!$('h2').attr('style'));
 ```
 
-You should create a `style` element.
+그리고 `style` 요소를 생성해야 합니다.
 
 ```js
 assert($('style') && $('style').length >= 1);
 ```
 
-Your `h2` element should be blue.
+`h2` 요소는 파란색으로 나타나야 합니다.
 
 ```js
 assert($('h2').css('color') === 'rgb(0, 0, 255)');
 ```
 
-Your stylesheet `h2` declaration should be valid with a semicolon and closing brace.
+스타일시트에 있는 `h2` 선언은 세미콜론과 닫는 중괄호를 갖고 있어야 합니다.
 
 ```js
 assert(code.match(/h2\s*\{\s*color\s*:.*;\s*\}/g));
 ```
 
-All your `style` elements should be valid and have closing tags.
+모든 `style` 요소는 유효하며 닫는 태그를 갖고 있어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-css-variables-to-change-several-elements-at-once.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-css-variables-to-change-several-elements-at-once.md
index 61f62132c6f..86abf388c20 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-css-variables-to-change-several-elements-at-once.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-css-variables-to-change-several-elements-at-once.md
@@ -1,6 +1,6 @@
 ---
 id: 5a9d725e424fe3d0e10cad10
-title: Use CSS Variables to change several elements at once
+title: CSS 변수를 사용하여 한 번에 여러 엘리먼트 변경하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c6bDECm'
 forumTopicId: 301093
@@ -9,17 +9,17 @@ dashedName: use-css-variables-to-change-several-elements-at-once
 
 # --description--
 
-<dfn>CSS Variables</dfn> are a powerful way to change many CSS style properties at once by changing only one value.
+<dfn>CSS 변수</dfn>는 하나의 값만 변경하여 여러 개의 CSS 스타일 속성을 한번에 변경할 수 있는 강력한 방법입니다.
 
-Follow the instructions below to see how changing just three values can change the styling of many elements.
+아래 설명에 따라 세 가지의 값만 변경하는 것이 얼마나 많은 엘리먼트의 스타일을 바꿀 수 있는지 확인해보세요.
 
 # --instructions--
 
-In the `penguin` class, change the `black` value to `gray`, the `gray` value to `white`, and the `yellow` value to `orange`.
+`penguin` 클래스에서 `black` 값을 `gray`로,  `gray` 값을  `white`로, 그리고  `yellow` 값을  `orange`로 변경합니다.
 
 # --hints--
 
-`penguin` class should declare the `--penguin-skin` variable and assign it to `gray`.
+`penguin` 클래스는 `--penguin-skin` 변수를 선언하고 `gray`에 할당해야 합니다.
 
 ```js
 assert(
@@ -27,7 +27,7 @@ assert(
 );
 ```
 
-`penguin` class should declare the `--penguin-belly` variable and assign it to `white`.
+`penguin` 클래스는 `--penguin-belly` 변수를 선언하고 `white`에 할당해야 합니다.
 
 ```js
 assert(
@@ -35,7 +35,7 @@ assert(
 );
 ```
 
-`penguin` class should declare the `--penguin-beak` variable and assign it to `orange`.
+`penguin` 클래스는 `--penguin-beak` 변수를 선언하고 `orange`에 할당해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-hex-code-for-specific-colors.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-hex-code-for-specific-colors.md
index 5e66a0543dd..166c6c644f5 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-hex-code-for-specific-colors.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-hex-code-for-specific-colors.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08726
-title: Use Hex Code for Specific Colors
+title: 특정 색상에 대한 헥스 코드를 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/c8W9mHM'
 forumTopicId: 18350
@@ -9,11 +9,11 @@ dashedName: use-hex-code-for-specific-colors
 
 # --description--
 
-Did you know there are other ways to represent colors in CSS? One of these ways is called hexadecimal code, or hex code for short.
+CSS에서 색상을 표현하는 다른 방법이 있다는 것을 알고 계셨나요? 그 중 하나는 16진수 코드 또는 간단히 헥스(hex) 코드를 사용하는 방법입니다.
 
-We usually use <dfn>decimals</dfn>, or base 10 numbers, which use the symbols 0 to 9 for each digit. <dfn>Hexadecimals</dfn> (or <dfn>hex</dfn>) are base 16 numbers. This means it uses sixteen distinct symbols. Like decimals, the symbols 0-9 represent the values zero to nine. Then A,B,C,D,E,F represent the values ten to fifteen. Altogether, 0 to F can represent a digit in hexadecimal, giving us 16 total possible values. You can find more information about <a href="https://www.freecodecamp.org/news/hexadecimal-number-system/" target="_blank" rel="noopener noreferrer nofollow">hexadecimal numbers here</a>.
+보통 우리는 <dfn>decimals</dfn>, 또는 기수 10 숫자를 사용하며, 각 자릿수에 0에서 9까지의 기호를 사용합니다. <dfn>Hexadecimals</dfn> (또는 <dfn>hex</dfn>)는 기수 16 숫자입니다. 이는 16개의 구별되는 기호를 사용한다는 것을 의미합니다. 10진수와 마찬가지로 기호 0에서 9는 숫자 영부터 아홉까지의 값을 나타냅니다. 그런 다음 A, B, C, D, E, F는 10부터 15까지의 값을 나타냅니다. 모두 합쳐 0부터 F까지는 16진수에서 한 자리 숫자를 나타낼 수 있으며, 이로써 16가지의 가능한 값이 생깁니다. <a href="https://www.freecodecamp.org/news/hexadecimal-number-system/" target="_blank" rel="noopener noreferrer nofollow">여기에서 16진수</a>에 대한 더 많은 정보를 찾을 수 있습니다.
 
-In CSS, we can use 6 hexadecimal digits to represent colors, two each for the red (R), green (G), and blue (B) components. For example, `#000000` is black and is also the lowest possible value. You can find more information about the <a href="https://www.freecodecamp.org/news/rgb-color-html-and-css-guide/#whatisthergbcolormodel" target="_blank" rel="noopener noreferrer nofollow">RGB color system here</a>.
+CSS에서는 6자의 16진수 숫자를 사용하여 색상을 나타낼 수 있습니다. 두 글자씩 묶여진 부분은 각각 빨간색(R), 녹색(G), 파란색(B) 구성 요소를 나타내는 데 사용됩니다. 예를 들어, `#000000`은 검정색이며 또한 가장 낮은 값입니다. <a href="https://www.freecodecamp.org/news/rgb-color-html-and-css-guide/#whatisthergbcolormodel" target="_blank" rel="noopener noreferrer nofollow">여기에서 RGB 색상 시스템</a>에 대한 더 많은 정보를 찾을 수 있습니다.
 
 ```css
 body {
@@ -23,17 +23,17 @@ body {
 
 # --instructions--
 
-Replace the word `black` in our `body` element's background-color with its hex code representation, `#000000`.
+`body` 요소의 배경색을 단어 `black`에서 그 헥스 코드 표현인 `#000000`으로 바꿔주세요.
 
 # --hints--
 
-Your `body` element should have the `background-color` of black.
+`body` 요소는 검정색의 `background-color`를 가져야 합니다.
 
 ```js
 assert($('body').css('background-color') === 'rgb(0, 0, 0)');
 ```
 
-The hex code for the color black should be used instead of the word `black`.
+검정색을 나타내는 색상 헥스 코드 대신에 헤당 단어 `black`이 사용되어서는 안 됩니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-hex-code-to-mix-colors.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-hex-code-to-mix-colors.md
index d2a93e41223..1d665ec3ee3 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-hex-code-to-mix-colors.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-hex-code-to-mix-colors.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08721
-title: Use Hex Code to Mix Colors
+title: 색 합성을 16진수 코드 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cK89PhP'
 forumTopicId: 18359
@@ -9,67 +9,67 @@ dashedName: use-hex-code-to-mix-colors
 
 # --description--
 
-To review, hex codes use 6 hexadecimal digits to represent colors, two each for red (R), green (G), and blue (B) components.
+검토하면, 16진수 코드는 색을 나타내기 위해 6개의 16진수 숫자를 사용하며, 각각이 빨강 (R), 초록 (G), 그리고 파랑 (B) 구성 요소를 나타냅니다.
 
-From these three pure colors (red, green, and blue), we can vary the amounts of each to create over 16 million other colors!
+이 세 개의 원색(빨강, 초록 그리고 파랑)으로부터 1,600만의 다른 색을 만들도록 각 색의 양을 조절할 수 있습니다.
 
-For example, orange is pure red, mixed with some green, and no blue. In hex code, this translates to being `#FFA500`.
+예를 들면 주황색은 약간의 초록색을 섞은 순수 빨간색이며 파란색은 들어있지 않습니다. 16진수에서 이는 `#FFA500`로 표현됩니다.
 
-The digit `0` is the lowest number in hex code, and represents a complete absence of color.
+`0`은 16진수에서 가장 적은 수이며 색이 없다는 것을 말합니다.
 
-The digit `F` is the highest number in hex code, and represents the maximum possible brightness.
+`F`는 16진수에서 가장 큰 수이며 최대로 가능한 밝기를 나타냅니다.
 
 # --instructions--
 
-Replace the color words in our `style` element with their correct hex codes.
+`style` 요소에 있는 색 관련 단어들을 올바른 16진수로 대체하시오.
 
-<table><tbody><tr><th>Color</th><th>Hex Code</th></tr><tr><td>Dodger Blue</td><td><code>#1E90FF</code></td></tr><tr><td>Green</td><td><code>#00FF00</code></td></tr><tr><td>Orange</td><td><code>#FFA500</code></td></tr><tr><td>Red</td><td><code>#FF0000</code></td></tr></tbody></table>
+<table><tbody><tr><th>색</th><th>16진수 코드</th></tr><tr><td>다저 블루</td><td><code>#1E90FF</code></td></tr><tr><td>초록</td><td><code>#00FF00</code></td></tr><tr><td>주황</td><td><code>#FFA500</code></td></tr><tr><td>빨강</td><td><code>#FF0000</code></td></tr></tbody></table>
 
 # --hints--
 
-Your `h1` element with the text `I am red!` should be given the `color` red.
+`I am red!`를 가진 `h1`은 `color`가 빨간색으로 주어져야 합니다.
 
 ```js
 assert($('.red-text').css('color') === 'rgb(255, 0, 0)');
 ```
 
-The `hex code` for the color red should be used instead of the word `red`.
+단어 `red` 대신에 빨간색에 맞는 `hex code`가 사용되어야 합니다.
 
 ```js
 assert(code.match(/\.red-text\s*?{\s*?color\s*:\s*?(#FF0000|#F00)\s*?;?\s*?}/gi));
 ```
 
-Your `h1` element with the text `I am green!` should be given the `color` green.
+`I am green!`를 가진 `h1` 요소는 `color`가 초록으로 주어져야 합니다.
 
 ```js
 assert($('.green-text').css('color') === 'rgb(0, 255, 0)');
 ```
 
-The `hex code` for the color green should be used instead of the word `green`.
+단어 `green` 대신에 초록색에 맞는 `hex code`가 사용되어야 합니다.
 
 ```js
 assert(code.match(/\.green-text\s*?{\s*?color\s*:\s*?(#00FF00|#0F0)\s*?;?\s*?}/gi));
 ```
 
-Your `h1` element with the text `I am dodger blue!` should be given the `color` dodger blue.
+`I am dodger blue!`를 가진 `h1` 요소는 `color`가 다저 블루로 주어져야 합니다.
 
 ```js
 assert($('.dodger-blue-text').css('color') === 'rgb(30, 144, 255)');
 ```
 
-The `hex code` for the color dodger blue should be used instead of the word `dodgerblue`.
+단어 `dodgerblue` 대신에 다저 블루색에 맞는 `hex code`가 사용되어야 합니다.
 
 ```js
 assert(code.match(/\.dodger-blue-text\s*?{\s*?color\s*:\s*?#1E90FF\s*?;?\s*?}/gi));
 ```
 
-Your `h1` element with the text `I am orange!` should be given the `color` orange.
+`I am orange!`를 가진 `h1` 요소는 `color`가 주황으로 주어져야 합니다.
 
 ```js
 assert($('.orange-text').css('color') === 'rgb(255, 165, 0)');
 ```
 
-The `hex code` for the color orange should be used instead of the word `orange`.
+단어 `orange` 대신에 주황색에 맞는 `hex code`가 사용되어야 합니다.
 
 ```js
 assert(code.match(/\.orange-text\s*?{\s*?color\s*:\s*?#FFA500\s*?;?\s*?}/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-rgb-to-mix-colors.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-rgb-to-mix-colors.md
index c8e3a6e16de..9196e4384fe 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-rgb-to-mix-colors.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-rgb-to-mix-colors.md
@@ -1,6 +1,6 @@
 ---
 id: bad82fee1348bd9aedf08721
-title: Use RGB to Mix Colors
+title: RGB를 사용하여 색 섞기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cm24JU6'
 forumTopicId: 18368
@@ -9,23 +9,23 @@ dashedName: use-rgb-to-mix-colors
 
 # --description--
 
-Just like with hex code, you can mix colors in RGB by using combinations of different values.
+헥스(hex) 코드와 마찬가지로 RGB 값을 다양하게 조합해서 사용하여 색상을 섞을 수 있습니다.
 
 # --instructions--
 
-Replace the hex codes in our `style` element with their correct RGB values.
+`style` 엘리먼트의 헥스 코드를 올바른 RGB값으로 바꿔주세요.
 
-<table><tbody><tr><th>Color</th><th>RGB</th></tr><tr><td>Blue</td><td><code>rgb(0, 0, 255)</code></td></tr><tr><td>Red</td><td><code>rgb(255, 0, 0)</code></td></tr><tr><td>Orchid</td><td><code>rgb(218, 112, 214)</code></td></tr><tr><td>Sienna</td><td><code>rgb(160, 82, 45)</code></td></tr></tbody></table>
+<table><tbody><tr><th>색</th><th>RGB</th></tr><tr><td>Blue(파란색)</td><td><code>rgb(0, 0, 255)</code></td></tr><tr><td>Red(빨간색)</td><td><code>rgb(255, 0, 0)</code></td></tr><tr><td>Orchid(오키드)</td><td><code>rgb(218, 112, 214)</code></td></tr><tr><td>Sienna(시에나)</td><td><code>rgb(160, 82, 45)</code></td></tr></tbody></table>
 
 # --hints--
 
-Your `h1` element with the text `I am red!` should have the `color` red.
+`I am red!`라는 텍스트가 있는 `h1` 엘리먼트의 `color`는 빨간색이어야 합니다.
 
 ```js
 assert($('.red-text').css('color') === 'rgb(255, 0, 0)');
 ```
 
-You should use `rgb` for the color red.
+빨간색을 나타내기 위해 `rgb`를 사용해야 합니다.
 
 ```js
 assert(
@@ -35,13 +35,13 @@ assert(
 );
 ```
 
-Your `h1` element with the text `I am orchid!` should have the `color` orchid.
+`I am orchid!`라는 텍스트가 있는 `h1` 엘리먼트의 `color`는 오키드색이어야 합니다.
 
 ```js
 assert($('.orchid-text').css('color') === 'rgb(218, 112, 214)');
 ```
 
-You should use `rgb` for the color orchid.
+오키드색을 나타내기 위해 `rgb`를 사용해야 합니다.
 
 ```js
 assert(
@@ -51,13 +51,13 @@ assert(
 );
 ```
 
-Your `h1` element with the text `I am blue!` should have the `color` blue.
+`I am blue!`라는 텍스트가 있는 `h1` 엘리먼트의 `color`는 파란색이어야 합니다.
 
 ```js
 assert($('.blue-text').css('color') === 'rgb(0, 0, 255)');
 ```
 
-You should use `rgb` for the color blue.
+파란색을 나타내기 위해 `rgb`를 사용해야 합니다.
 
 ```js
 assert(
@@ -67,13 +67,13 @@ assert(
 );
 ```
 
-Your `h1` element with the text `I am sienna!` should have the `color` sienna.
+`I am sienna!`라는 텍스트가 있는 `h1` 엘리먼트의 `color`는 시에나색이어야 합니다.
 
 ```js
 assert($('.sienna-text').css('color') === 'rgb(160, 82, 45)');
 ```
 
-You should use `rgb` for the color sienna.
+시에나색을 나타내기 위해 `rgb`를 사용해야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-rgb-values-to-color-elements.md b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-rgb-values-to-color-elements.md
index a280b1cfad0..1047e8f00fc 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-rgb-values-to-color-elements.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-css/use-rgb-values-to-color-elements.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aede08718
-title: Use RGB values to Color Elements
+title: Color 엘리먼트에 RGB 값 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/c/cRkp2fr'
 forumTopicId: 18369
@@ -9,25 +9,25 @@ dashedName: use-rgb-values-to-color-elements
 
 # --description--
 
-Another way you can represent colors in CSS is by using `RGB` values.
+CSS에서 색상을 표현하는 또 다른 방법은 `RGB` 값을 사용하는 것입니다.
 
-The `RGB` value for black looks like this:
+검정색의 `RGB` 값은 다음과 같습니다:
 
 ```css
 rgb(0, 0, 0)
 ```
 
-The `RGB` value for white looks like this:
+하얀색의 `RGB` 값은 다음과 같습니다:
 
 ```css
 rgb(255, 255, 255)
 ```
 
-Instead of using six hexadecimal digits like you do with hex code, with `RGB` you specify the brightness of each color with a number between 0 and 255.
+헥스 코드(hex code)처럼 6자리의 16진수를 사용하는 대신 `RGB`를 사용하면 0에서 255 사이의 숫자로 각 색상의 밝기를 지정할 수 있습니다.
 
-If you do the math, the two digits for one color equal 16 times 16, which gives us 256 total values. So `RGB`, which starts counting from zero, has the exact same number of possible values as hex code.
+계산을 해보면 한 색의 두 자리 숫자는 16 곱하기 16과 같아서 총 256개의 값이 나옵니다. 따라서 0부터 세기 시작하는 `RGB`는 헥스 코드와 가능한 값의 수가 정확히 일치합니다.
 
-Here's an example of how you'd change the `body` background to orange using its RGB code.
+다음은 RGB 코드를 사용하여 `body`의 배경색을 orange로 변경하는 방법의 예시입니다.
 
 ```css
 body {
@@ -37,17 +37,17 @@ body {
 
 # --instructions--
 
-Let's replace the hex code in our `body` element's background color with the RGB value for black: `rgb(0, 0, 0)`
+`body` 요소의 배경색에 있는 헥스 코드를 black에 대한 RGB 값인 `rgb(0, 0, 0)`로 바꿔주세요.
 
 # --hints--
 
-Your `body` element should have a black background.
+`body` 요소는 검정 배경색을 갖고 있어야 합니다.
 
 ```js
 assert($('body').css('background-color') === 'rgb(0, 0, 0)');
 ```
 
-You should use `rgb` to give your `body` element a background of black.
+`body` 요소의 배경색을 검정색으로 지정하려면 `rgb`를 사용해야 합니다.
 
 ```js
 assert(code.match(/rgb\s*\(\s*0\s*,\s*0\s*,\s*0\s*\)/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/add-a-submit-button-to-a-form.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/add-a-submit-button-to-a-form.md
index 25f446b403d..f99a0557bff 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/add-a-submit-button-to-a-form.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/add-a-submit-button-to-a-form.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedd08830
-title: Add a Submit Button to a Form
+title: 설문 조사 양식에 제출(Submit) 버튼 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cp2Nkhz'
 forumTopicId: 16627
@@ -9,9 +9,9 @@ dashedName: add-a-submit-button-to-a-form
 
 # --description--
 
-Let's add a `submit` button to your form. Clicking this button will send the data from your form to the URL you specified with your form's `action` attribute.
+`submit` 버튼을 설문 조사 양식에 생성해 보겠습니다. 이 버튼을 클릭하면 폼에 있는 데이터를 `action` 속성으로 지정한 URL로 제출할 수 있습니다.
 
-Here's an example submit button:
+다음은 제출 버튼의 예시입니다.
 
 ```html
 <button type="submit">this button submits the form</button>
@@ -19,23 +19,23 @@ Here's an example submit button:
 
 # --instructions--
 
-Add a button as the last element of your `form` element with a type of `submit`, and `Submit` as its text.
+버튼을 `form` 마지막 요소로 생성할시 타입은`submit`, 그리고 텍스트는 `Submit` 으로 정합니다.
 
 # --hints--
 
-Your `form` should have a `button` inside it.
+`button`이 `form`안에 있어야 합니다.
 
 ```js
 assert($('form').children('button').length > 0);
 ```
 
-Your submit button should have the attribute `type` set to `submit`.
+제출 버튼에는 `submit`으로 설정된 `type` 속성이 있어야 합니다.
 
 ```js
 assert($('button').attr('type') === 'submit');
 ```
 
-Your submit button should only have the text `Submit`.
+제출(Submit) 버튼 안에는 `Submit` 텍스트만 있어야 합니다.
 
 ```js
 assert(
@@ -45,7 +45,7 @@ assert(
 );
 ```
 
-Your `button` element should have a closing tag.
+`h2` 요소에 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/add-images-to-your-website.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/add-images-to-your-website.md
index 9dcef620cf9..a572accb4ff 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/add-images-to-your-website.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/add-images-to-your-website.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08812
-title: Add Images to Your Website
+title: 웹사이트에 이미지 추가하기
 challengeType: 0
 forumTopicId: 16640
 dashedName: add-images-to-your-website
@@ -8,23 +8,23 @@ dashedName: add-images-to-your-website
 
 # --description--
 
-You can add images to your website by using the `img` element, and point to a specific image's URL using the `src` attribute.
+`img` 요소를 이용해서 웹사이트에 이미지를 추가하고 `src` 속성을 이용하여 특정 이미지의 URL을 지정할 수 있습니다.
 
-An example of this would be:
+이에 대한 예는 다음과 같습니다.
 
 ```html
 <img src="https://www.freecatphotoapp.com/your-image.jpg">
 ```
 
-Note that `img` elements are self-closing.
+`img` 요소는 닫는 태그가 없습니다.
 
-All `img` elements **must** have an `alt` attribute. The text inside an `alt` attribute is used for screen readers to improve accessibility and is displayed if the image fails to load.
+모든 `img` 요소는 **반드시** `alt` 속성이 있어야 합니다. `alt` 속성 안의 텍스트는 접근성을 향상시키기 위해 스크린 리더에 사용되며 이미지가 로딩에 실패하면 표시됩니다.
 
-**Note:** If the image is purely decorative, using an empty `alt` attribute is a best practice.
+**노트:** 만약 이미지가 장식을 목적으로 사용되었을 경우 `alt` 속성을 적용된 값이 없이 비어있는 상태로 사용하는 것이 가장 좋습니다.
 
-Ideally the `alt` attribute should not contain special characters unless needed.
+`alt` 속성은 필요하지 않은 한 특수 문자를 포함하지 않아야 합니다.
 
-Let's add an `alt` attribute to our `img` example above:
+위의 예시 `img` 요소에 `alt` 속성을 추가해 보겠습니다.
 
 ```html
 <img src="https://www.freecatphotoapp.com/your-image.jpg" alt="freeCodeCamp logo">
@@ -32,29 +32,29 @@ Let's add an `alt` attribute to our `img` example above:
 
 # --instructions--
 
-Let's try to add an image to our website:
+웹사이트에 이미지를 추가해 보겠습니다.
 
-Within the existing `main` element, insert an `img` element before the existing `p` elements.
+기존 `main` 요소 내에서, `p` 요소 앞에 `img` 요소를 삽입하세요.
 
-Now set the `src` attribute so that it points to the url `https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg`
+이제 `src` 속성을 설정하여 URL `https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg` 을 지정하세요.
 
-Finally, don't forget to give your `img` element an `alt` attribute with applicable text.
+마지막으로, `img` 요소에 적용 가능한 텍스트와 함께 `alt` 속성을 사용하는 것을 잊지 마세요.
 
 # --hints--
 
-Your page should have an image element.
+페이지에는 이미지 요소가 있어야 합니다.
 
 ```js
 assert($('img').length);
 ```
 
-Your image should have a `src` attribute that points to the kitten image.
+이미지에는 아기 고양이 사진을 지정하는 `src` 속성이 있어야 합니다.
 
 ```js
 assert(/^https:\/\/cdn\.freecodecamp\.org\/curriculum\/cat-photo-app\/relaxing-cat\.jpg$/i.test($('img').attr('src')));
 ```
 
-Your image element's `alt` attribute should not be empty.
+이미지 요소의 `alt` 속성은 비어 있지 않아야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/add-placeholder-text-to-a-text-field.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/add-placeholder-text-to-a-text-field.md
index fbfed39abb4..782dabc9401 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/add-placeholder-text-to-a-text-field.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/add-placeholder-text-to-a-text-field.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08830
-title: Add Placeholder Text to a Text Field
+title: 플레이스홀더(Placeholder) 텍스트를 Text Field에 추가하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cKdJDhg'
 forumTopicId: 16647
@@ -9,29 +9,29 @@ dashedName: add-placeholder-text-to-a-text-field
 
 # --description--
 
-Placeholder text is what is displayed in your `input` element before your user has inputted anything.
+플레이스홀더(Placeholder) 텍스트는 사용자가 무언가를 입력하기 전에 `input` 엘리먼트에 표시되는 내용입니다.
 
-You can create placeholder text like so:
+다음과 같이 플레이스홀더 텍스트를 생성할 수 있습니다.
 
 ```html
 <input type="text" placeholder="this is placeholder text">
 ```
 
-**Note:** Remember that `input` elements are self-closing.
+**참고:** `input` 엘리먼트는 자동으로 닫힙니다 (self-closing).
 
 # --instructions--
 
-Set the `placeholder` value of your text `input` to "cat photo URL".
+`input`의 `placeholder` 값을 "cat photo URL"로 설정하세요.
 
 # --hints--
 
-You should add a `placeholder` attribute to the existing text `input` element.
+기존 텍스트 `input` 엘리먼트에 `placeholder` 속성을 추가해야 합니다.
 
 ```js
 assert($('input[placeholder]').length > 0);
 ```
 
-You should set the value of your `placeholder` attribute to `cat photo URL`.
+`placeholder` 속성값을 `cat photo URL`로 설정해야 합니다.
 
 ```js
 assert(
@@ -43,13 +43,13 @@ assert(
 );
 ```
 
-The finished `input` element should not have a closing tag.
+완성된 `input` 요소에는 닫는 태그(closing tag)가 있으면 안됩니다.
 
 ```js
 assert(!code.match(/<input.*\/?>.*<\/input>/gi));
 ```
 
-The finished `input` element should have valid syntax.
+완성된 `input` 요소에는 정확한 문법(syntax)이 사용되어야 합니다.
 
 ```js
 assert($('input[type=text]').length > 0);
@@ -88,9 +88,9 @@ assert($('input[type=text]').length > 0);
 <h2>CatPhotoApp</h2>
 <main>
   <p>Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
-  
+
   <p>Things cats love:</p>
   <ul>
     <li>cat nip</li>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/check-radio-buttons-and-checkboxes-by-default.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/check-radio-buttons-and-checkboxes-by-default.md
index a096fcbeeec..5d4a7147654 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/check-radio-buttons-and-checkboxes-by-default.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/check-radio-buttons-and-checkboxes-by-default.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedd08835
-title: Check Radio Buttons and Checkboxes by Default
+title: 라디오 버튼과 체크박스의 기본값 설정하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cWk3Qh6'
 forumTopicId: 301094
@@ -9,9 +9,9 @@ dashedName: check-radio-buttons-and-checkboxes-by-default
 
 # --description--
 
-You can set a checkbox or radio button to be checked by default using the `checked` attribute.
+`checked` 속성을 사용하여 체크박스(checkbox) 또는 라디오 버튼(radio button)이 체크되어 있도록 기본값을 설정할 수 있습니다.
 
-To do this, just add the word `checked` to the inside of an `input` element. For example:
+그러기 위해선 `input` 요소 내부에 `checked`라는 단어를 추가하면 됩니다. 예시:
 
 ```html
 <input type="radio" name="test-name" checked>
@@ -19,29 +19,29 @@ To do this, just add the word `checked` to the inside of an `input` element. For
 
 # --instructions--
 
-Set the first of your radio buttons and the first of your checkboxes to both be checked by default.
+라디오 버튼의 첫 번째와 체크박스의 첫 번째가 모두 기본적으로 선택되어 있도록 설정하세요.
 
 # --hints--
 
-Your first radio button on your form should be checked by default.
+Form의 첫 번째 라디오 버튼이 기본적으로 선택되어 있어야 합니다.
 
 ```js
 assert($('input[type="radio"]').prop('checked'));
 ```
 
-Your first checkbox on your form should be checked by default.
+Form의 첫 번째 체크박스가 기본적으로 선택되어 있어야 합니다.
 
 ```js
 assert($('input[type="checkbox"]').prop('checked'));
 ```
 
-You should not change the inner text of the `Indoor` label.
+`Indoor` 라벨 내부의 텍스트를 변경하지 마세요.
 
 ```js
 assert.equal(document.querySelector('label[for="indoor"]')?.innerText?.trim(), 'Indoor');
 ```
 
-You should not change the inner text of the `Loving` label.
+`Loving` 라벨 내부의 텍스트를 변경하지 마세요.
 
 ```js
 assert.equal(document.querySelector('label[for="loving"]')?.innerText?.trim(), 'Loving');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/comment-out-html.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/comment-out-html.md
index 178b029cc95..5eb56702de0 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/comment-out-html.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/comment-out-html.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08804
-title: Comment out HTML
+title: HTML 주석 처리
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cGyGbca'
 forumTopicId: 16782
@@ -9,41 +9,41 @@ dashedName: comment-out-html
 
 # --description--
 
-Remember that in order to start a comment, you need to use `<!--` and to end a comment, you need to use `-->`
+주석을 시작하려면 `<!--`를 사용해야 하고, 주석을 끝내려면 `-->`를 사용해야 합니다.
 
-Here you'll need to end the comment before your `h2` element begins.
+여기에서는 `h2` 요소가 시작되기 전에 주석을 끝내야 합니다.
 
 # --instructions--
 
-Comment out your `h1` element and your `p` element, but not your `h2` element.
+`h1` 요소와 `p` 요소를 주석 처리하지만 `h2` 요소는 주석 처리하지 마십시오.
 
 # --hints--
 
-Your `h1` element should be commented out so that it is not visible on the page.
+`h1` 요소는 주석 처리되어 페이지에 보이지 않아야 합니다.
 
 ```js
 assert($('h1').length === 0);
 ```
 
-Your `h2` element should not be commented out so that it is visible on the page.
+`h2` 요소는 주석 처리되지 않아서 페이지에 보여야 합니다.
 
 ```js
 assert($('h2').length > 0);
 ```
 
-Your `p` element should be commented out so that it is not visible on the page.
+`p` 요소는 주석 처리되어 페이지에 보이지 않아야 합니다.
 
 ```js
 assert($('p').length === 0);
 ```
 
-Each of your comments should be closed with `-->`.
+모든 주석은 `-->`로 끝나야 합니다.
 
 ```js
 assert(code.match(/[^fc]-->/g).length > 1);
 ```
 
-You should not change the order of the `h1`, `h2`, or `p` elements in the code.
+`h1`, `h2` 또는 `p` 요소의 순서가 변경되면 안 됩니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-bulleted-unordered-list.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-bulleted-unordered-list.md
index c625011ae19..df979870bb0 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-bulleted-unordered-list.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-bulleted-unordered-list.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08827
-title: Create a Bulleted Unordered List
+title: 글머리 기호가 없는 목록 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cDKVPuv'
 forumTopicId: 16814
@@ -9,11 +9,11 @@ dashedName: create-a-bulleted-unordered-list
 
 # --description--
 
-HTML has a special element for creating <dfn>unordered lists</dfn>, or bullet point style lists.
+HTML는 <dfn>순서없는 목록</dfn> 혹은 글머리 기호 스타일을 생성하는데 특별한 요소를 가지고 있습니다.
 
-Unordered lists start with an opening `<ul>` element, followed by any number of `<li>` elements. Finally, unordered lists close with a `</ul>`.
+순서없는 목록은 `<ul>` 요소로 시작되며 `<li>` 요소가 뒤따라옵니다. 마지막으로 순서없는 목록은 `</ul>`로 끝나게 됩니다.
 
-For example:
+예:
 
 ```html
 <ul>
@@ -22,27 +22,27 @@ For example:
 </ul>
 ```
 
-would create a bullet point style list of `milk` and `cheese`.
+`milk`와 `cheese`의 글머리 기호 스타일 목록이 생성됩니다.
 
 # --instructions--
 
-Remove the last two `p` elements and create an unordered list of three things that cats love at the bottom of the page.
+마지막 두 `p` 요소를 삭제하고 페이지 하단에 고양이가 좋아하는 세 개의 순서없는 목록을 만드세요.
 
 # --hints--
 
-Create a `ul` element.
+`ul` 요소를 만드세요.
 
 ```js
 assert($('ul').length > 0);
 ```
 
-You should have three `li` elements within your `ul` element.
+`ul` 요소 안에 3개의 `li` 요소를 가져야 합니다.
 
 ```js
 assert($('ul li').length > 2);
 ```
 
-Your `ul` element should have a closing tag.
+`ul` 요소는 닫는 태그를 가져야 합니다.
 
 ```js
 assert(
@@ -52,7 +52,7 @@ assert(
 );
 ```
 
-Your `li` elements should have closing tags.
+`li` 요소는 닫는 태그를 가져야 합니다.
 
 ```js
 assert(
@@ -62,7 +62,7 @@ assert(
 );
 ```
 
-Your `li` elements should not contain an empty string or only white-space.
+`li` 요소는 빈 문자열이나 비어있는 여백을 가지지 않아야 합니다.
 
 ```js
 assert($('ul li').filter((_, item) => !$(item).text().trim()).length === 0);
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-form-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-form-element.md
index 8ab63d7a071..581d1904d1e 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-form-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-form-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aede08830
-title: Create a Form Element
+title: Form 요소 만들기
 challengeType: 0
 forumTopicId: 16817
 dashedName: create-a-form-element
@@ -8,9 +8,9 @@ dashedName: create-a-form-element
 
 # --description--
 
-You can build web forms that actually submit data to a server using nothing more than pure HTML. You can do this by specifying an `action` attribute on your `form` element.
+순수 HTML만 이용하여 서버에 정보를 보내는 웹 폼(form)을 만들 수 있습니다. `form` 요소에 `action` 속성을 특정하면 이 작업을 할 수 있습니다.
 
-For example:
+예시:
 
 ```html
 <form action="url-where-you-want-to-submit-form-data">
@@ -20,11 +20,11 @@ For example:
 
 # --instructions--
 
-Nest the existing `input` element inside a `form` element and assign `"https://www.freecatphotoapp.com/submit-cat-photo"` to the `action` attribute of the `form` element.
+`form` 요소 안에 기존 `input` 요소를 중첩하고 `"https://www.freecatphotoapp.com/submit-cat-photo"`를 `form` 요소의 `action` 속성에 할당하세요.
 
 # --hints--
 
-The existing `input` element should be nested within a `form` element.
+`input` 요소는 `form` 요소에 중첩되어야 합니다.
 
 ```js
 const inputElem = document.querySelector('form input');
@@ -34,14 +34,14 @@ assert(
 );
 ```
 
-Your `form` should have an `action` attribute which is set to `https://www.freecatphotoapp.com/submit-cat-photo`.
+`form`는 `https://www.freecatphotoapp.com/submit-cat-photo`로 설정된 `action` 속성을 가져야 합니다.
 
 ```js
 const action = $('form').attr('action');
 assert(action.match(/^https:\/\/(www\.)?freecatphotoapp\.com\/submit-cat-photo$/i))
 ```
 
-Your `form` element should have well-formed open and close tags.
+`form` 요소는 여는/닫는 태그로 정확한 형식을 갖추어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-set-of-checkboxes.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-set-of-checkboxes.md
index 133795f0326..d310ed4153c 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-set-of-checkboxes.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-set-of-checkboxes.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08835
-title: Create a Set of Checkboxes
+title: 체크박스 세트 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cqrkJsp'
 forumTopicId: 16821
@@ -9,17 +9,17 @@ dashedName: create-a-set-of-checkboxes
 
 # --description--
 
-Forms commonly use <dfn>checkboxes</dfn> for questions that may have more than one answer.
+폼(form)은 일반적으로 하나 이상의 답을 가진 질문을 위한 <dfn>체크박스</dfn>를 사용합니다.
 
-Checkboxes are a type of `input`.
+체크박스는 `input`의 한 유형입니다.
 
-Each of your checkboxes can be nested within its own `label` element. By wrapping an `input` element inside of a `label` element it will automatically associate the checkbox input with the label element surrounding it.
+각 체크박스는 `label` 요소 안에 중첩될 수 있습니다. `label` 요소 안의 `input` 요소에 감싸면 체크박스 입력을 자동으로 체크박스를 둘러싼 레이블 요소와 연관시킵니다.
 
-All related checkbox inputs should have the same `name` attribute.
+모든 연관된 체크박스 입력은 같은 `name` 속성을 가져야 합니다.
 
-It is considered best practice to explicitly define the relationship between a checkbox `input` and its corresponding `label` by setting the `for` attribute on the `label` element to match the `id` attribute of the associated `input` element.
+`label` 요소에 있는 `for` 속성을 연관된 `input` 요소의 `id` 속성과 일치시켜 체크박스 `input`과 이에 상응하는 `label` 사이의 관계를 명시적으로 정의하는 것을 모범 사례로 여깁니다.
 
-Here's an example of a checkbox:
+여기 체크박스에 대한 예시가 있습니다.
 
 ```html
 <label for="loving"><input id="loving" type="checkbox" name="personality"> Loving</label>
@@ -27,23 +27,23 @@ Here's an example of a checkbox:
 
 # --instructions--
 
-Add to your form a set of three checkboxes. Each checkbox should be nested within its own `label` element. All three should share the `name` attribute of `personality`.
+세 개의 체크박스 세트를 폼에 추가하세요. 각 체크박스는 `label` 요소 내에 중첩되어야 합니다. 세 개 모두 `personality`의 `name` 속성을 공유해야 합니다.
 
 # --hints--
 
-Your page should have three checkbox elements.
+페이지에 세 개의 체크박스 요소가 있어야 합니다.
 
 ```js
 assert($('input[type="checkbox"]').length > 2);
 ```
 
-Each of your three checkbox elements should be nested in its own `label` element.
+세 개의 체크박스 요소 각각은 `label` 요소 안에 중첩되어야 합니다.
 
 ```js
 assert($('label > input[type="checkbox"]:only-child').length > 2);
 ```
 
-Make sure each of your `label` elements has a closing tag.
+`label` 요소에 닫는 태그가 있는지 확인하세요.
 
 ```js
 assert(
@@ -53,7 +53,7 @@ assert(
 );
 ```
 
-Your checkboxes should be given the `name` attribute of `personality`.
+체크박스는 `personality`의 `name` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -61,7 +61,7 @@ assert(
 );
 ```
 
-Each of your checkboxes should be added within the `form` tag.
+각 체크박스는 `form` 태그 안에 추가되어야 합니다.
 
 ```js
 assert($('label').parent().get(0).tagName.match('FORM'));
@@ -105,9 +105,9 @@ assert($('label').parent().get(0).tagName.match('FORM'));
 <h2>CatPhotoApp</h2>
 <main>
   <p>Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
-  
+
   <p>Things cats love:</p>
   <ul>
     <li>cat nip</li>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-set-of-radio-buttons.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-set-of-radio-buttons.md
index be47130db34..349aeb0bdf0 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-set-of-radio-buttons.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-set-of-radio-buttons.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08834
-title: Create a Set of Radio Buttons
+title: 라디오 버튼 세트 만들기
 challengeType: 0
 forumTopicId: 16822
 dashedName: create-a-set-of-radio-buttons
@@ -8,15 +8,15 @@ dashedName: create-a-set-of-radio-buttons
 
 # --description--
 
-You can use <dfn>radio buttons</dfn> for questions where you want the user to only give you one answer out of multiple options.
+사용자가 여러 선택지 중 하나를 선택하게 만드는 상황에 필요한 질문을 위한 <dfn>라디오 버튼</dfn>을 사용할 수 있습니다.
 
-Radio buttons are a type of `input`.
+라디오 버튼은 `input`의 한 유형입니다.
 
-Each of your radio buttons can be nested within its own `label` element. By wrapping an `input` element inside of a `label` element it will automatically associate the radio button input with the label element surrounding it.
+각 라디오 버튼은 `label` 요소 안에 중첩될 수 있습니다. `label` 요소 안의 `input` 요소를 감싸면 자동으로 라디오 버튼 입력과 이 버튼을 둘러싼 레이블 요소를 연관시킵니다.
 
-All related radio buttons should have the same `name` attribute to create a radio button group. By creating a radio group, selecting any single radio button will automatically deselect the other buttons within the same group ensuring only one answer is provided by the user.
+모든 연관된 라디오 버튼은 라디오 버튼 그룹을 만들도록 같은 `name` 속성을 가져야 합니다. 라디오 그룹을 생성할 때, 한 라디오 버튼을 선택하면 오직 하나만이 사용자에 의해 제공될 수 있도록 자동으로 다른 버튼은 선택이 풀리게 됩니다.
 
-Here's an example of a radio button:
+라디오 버튼에 관한 예시가 있습니다.
 
 ```html
 <label> 
@@ -24,14 +24,14 @@ Here's an example of a radio button:
 </label>
 ```
 
-It is considered best practice to set a `for` attribute on the `label` element, with a value that matches the value of the `id` attribute of the `input` element. This allows assistive technologies to create a linked relationship between the label and the related `input` element. For example:
+`label` 요소에 있는 `for` 속성을 `input` 요소의 `id` 속성 값으로 설정하는 것을 모범 사례로 여깁니다. 이는 접근성 기술이 연관된 `input`와 레이블 사이의 연결 관계를 생성하도록 해줍니다. 예시:
 
 ```html
 <input id="indoor" type="radio" name="indoor-outdoor">
 <label for="indoor">Indoor</label>
 ```
 
-We can also nest the `input` element within the `label` tags:
+`label` 태그 안에 `input` 요소를 중첩시킬 수도 있습니다.
 
 ```html
 <label for="indoor"> 
@@ -41,29 +41,29 @@ We can also nest the `input` element within the `label` tags:
 
 # --instructions--
 
-Add a pair of radio buttons to your form, each nested in its own `label` element. One should have the option of `indoor` and the other should have the option of `outdoor`. Both should share the `name` attribute of `indoor-outdoor` to create a radio group.
+`label` 요소 안에 중첩된 한 쌍의 라디오 버튼을 폼에 추가하세요. 그 중 하나는 `indoor`라는 선택지를 가지고 다른 하나는 `outdoor`라는 선택지를 가져야 합니다. 두 버튼 모두 라디오 그룹을 생성하도록 `indoor-outdoor`의 `name` 속성을 공유해야 합니다.
 
 # --hints--
 
-Your page should have two `radio` button elements.
+페이지에 두 개의 `radio` 버튼 요소가 있어야 합니다.
 
 ```js
 assert($('input[type="radio"]').length > 1);
 ```
 
-Your radio buttons should be given the `name` attribute of `indoor-outdoor`.
+라디오 버튼은 `indoor-outdoor`의 `name` 속성을 가져야 합니다.
 
 ```js
 assert($('input[type="radio"]').filter("[name='indoor-outdoor']").length > 1);
 ```
 
-Each of your two radio button elements should be nested in its own `label` element.
+두 라디오 버튼 각각은 `label` 요소 안에 중첩되어야 합니다.
 
 ```js
 assert($('label > input[type="radio"]:only-child').length > 1);
 ```
 
-Each of your `label` elements should have a closing tag.
+각 `label` 요소는 닫는 태그를 가져야 합니다.
 
 ```js
 assert(
@@ -73,7 +73,7 @@ assert(
 );
 ```
 
-One of your radio buttons should have the label `indoor`.
+라디오 버튼 중 하나는 레이블 `indoor`를 가져야 합니다.
 
 ```js
 assert(
@@ -83,7 +83,7 @@ assert(
 );
 ```
 
-One of your radio buttons should have the label `outdoor`.
+라디오 버튼 중 하나는 레이블 `outdoor`를 가져야 합니다.
 
 ```js
 assert(
@@ -93,7 +93,7 @@ assert(
 );
 ```
 
-Each of your radio button elements should be added within the `form` tag.
+라디오 버튼 각각은 `form` 태그 안에 추가되어야 합니다.
 
 ```js
 assert($('label').parent().get(0).tagName.match('FORM'));
@@ -135,9 +135,9 @@ assert($('label').parent().get(0).tagName.match('FORM'));
 <h2>CatPhotoApp</h2>
 <main>
   <p>Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
-  
+
   <p>Things cats love:</p>
   <ul>
     <li>cat nip</li>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-text-field.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-text-field.md
index 27b4210292e..befc4b78270 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-text-field.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-a-text-field.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08829
-title: Create a Text Field
+title: 글자 필드 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/c2EVnf6'
 forumTopicId: 16823
@@ -9,25 +9,25 @@ dashedName: create-a-text-field
 
 # --description--
 
-Now let's create a web form.
+이제 웹폼을 만들어보겠습니다.
 
-`input` elements are a convenient way to get input from your user.
+`input` 요소는 사용자로부터 입력을 받는 편리한 방법입니다.
 
-You can create a text input like this:
+다음과 같이 글자 입력을 만들 수 있습니다.
 
 ```html
 <input type="text">
 ```
 
-Note that `input` elements are self-closing.
+`input` 요소는 스스로 여닫는 태그임을 알아두시오.
 
 # --instructions--
 
-Create an `input` element of type `text` below your lists.
+목록 하위에 `text` 유형의 `input` 요소를 만드시오.
 
 # --hints--
 
-Your app should have an `input` element of type `text`.
+어플리케이션은 `text` 유형의 `input` 요소를 가져야 합니다.
 
 ```js
 assert($('input[type=text]').length > 0);
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-an-ordered-list.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-an-ordered-list.md
index 2684bfe9035..0670cc89812 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-an-ordered-list.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/create-an-ordered-list.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08828
-title: Create an Ordered List
+title: 순서가 있는 목록 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cQ3B8TM'
 forumTopicId: 16824
@@ -9,11 +9,11 @@ dashedName: create-an-ordered-list
 
 # --description--
 
-HTML has another special element for creating <dfn>ordered lists</dfn>, or numbered lists.
+HTML은 <dfn>순서가 있는 목록</dfn> 혹은 번호가 매겨진 목록을 만들기 위한 특별한 요소를 제공합니다.
 
-Ordered lists start with an opening `<ol>` element, followed by any number of `<li>` elements. Finally, ordered lists are closed with the `</ol>` tag.
+순서가 있는 목록은 `<ol>` 요소로 시작하며 `<li>` 요소가 뒤따릅니다. 마지막으로 순서가 있는 목록은 `</ol>` 태그로 닫힙니다.
 
-For example:
+예시:
 
 ```html
 <ol>
@@ -22,51 +22,51 @@ For example:
 </ol>
 ```
 
-would create a numbered list of `Garfield` and `Sylvester`.
+`Garfield`와 `Sylvester`의 번호가 매겨진 목록이 생성됩니다.
 
 # --instructions--
 
-Create an ordered list of the top 3 things cats hate the most.
+고양이가 제일 싫어하는 세 가지의 순서가 있는 목록을 만드세요.
 
 # --hints--
 
-You should have an ordered list for `Top 3 things cats hate:`
+`Top 3 things cats hate:`을 위한 순서가 있는 목록을 가져야 합니다.
 
 ```js
 assert(/Top 3 things cats hate:/i.test($('ol').prev().text()));
 ```
 
-You should have an unordered list for `Things cats love:`
+`Things cats love:`을 위한 순서가 없는 목록을 가져야 합니다.
 
 ```js
 assert(/Things cats love:/i.test($('ul').prev().text()));
 ```
 
-You should have only one `ul` element.
+`ul` 요소는 하나만 있어야 합니다.
 
 ```js
 assert.equal($('ul').length, 1);
 ```
 
-You should have only one `ol` element.
+`ol` 요소는 하나만 있어야 합니다.
 
 ```js
 assert.equal($('ol').length, 1);
 ```
 
-You should have three `li` elements within your `ul` element.
+`ul` 요소 안에 세 개의 `li` 요소가 있어야 합니다.
 
 ```js
 assert.equal($('ul li').length, 3);
 ```
 
-You should have three `li` elements within your `ol` element.
+`ol` 요소 안에 세 개의 `li` 요소가 있어야 합니다.
 
 ```js
 assert.equal($('ol li').length, 3);
 ```
 
-Your `ul` element should have a closing tag.
+`ul` 요소는 닫는 태그를 가져야 합니다.
 
 ```js
 assert(
@@ -75,7 +75,7 @@ assert(
 );
 ```
 
-Your `ol` element should have a closing tag.
+`ol` 요소는 닫는 태그를 가져야 합니다.
 
 ```js
 assert(
@@ -84,7 +84,7 @@ assert(
 );
 ```
 
-Your `li` element should have a closing tag.
+`li` 요소는 닫는 태그를 가져야 합니다.
 
 ```js
 assert(
@@ -94,7 +94,7 @@ assert(
 );
 ```
 
-The `li` elements in your unordered list should not be empty.
+순서가 없는 목록에 있는 `li` 요소는 비어있지 않아야 합니다.
 
 ```js
 $('ul li').each((i, val) =>
@@ -102,7 +102,7 @@ $('ul li').each((i, val) =>
 );
 ```
 
-The `li` elements in your ordered list should not be empty.
+순서가 있는 목록 안에 있는 `li` 요소는 비어있지 않아야 합니다.
 
 ```js
 $('ol li').each((i, val) =>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/declare-the-doctype-of-an-html-document.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/declare-the-doctype-of-an-html-document.md
index cab6e5cef3f..fd63523595a 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/declare-the-doctype-of-an-html-document.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/declare-the-doctype-of-an-html-document.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78aa367417b2b2512aed
-title: Declare the Doctype of an HTML Document
+title: HTML 문서의 유형 선언하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cra98AJ'
 forumTopicId: 301095
@@ -9,17 +9,17 @@ dashedName: declare-the-doctype-of-an-html-document
 
 # --description--
 
-The challenges so far have covered specific HTML elements and their uses. However, there are a few elements that give overall structure to your page, and should be included in every HTML document.
+지금까지 과제들은 특정 HTML 요소와 그 사용에 관한 것이었습니다. 그러나 페이지에 전반적인 구조를 잡고 모든 HTML 문서에 포함되는 몇몇 요소가 있습니다.
 
-At the top of your document, you need to tell the browser which version of HTML your page is using. HTML is an evolving language, and is updated regularly. Most major browsers support the latest specification, which is HTML5. However, older web pages may use previous versions of the language.
+문서 상단에 브라우저에게 페이지가 어떤 HTML 버전을 사용하는지 알려줄 필요가 있습니다. HTML은 진화하는 언어이고 정기적으로 업데이트가 됩니다. 대부분의 브라우저는 최신 사양인 HTML5을 지원합니다. 하지만 오래된 웹페이지는 이전 버전을 사용할지도 모릅니다.
 
-You tell the browser this information by adding the `<!DOCTYPE ...>` tag on the first line, where the `...` part is the version of HTML. For HTML5, you use `<!DOCTYPE html>`.
+첫 줄에 있는 `<!DOCTYPE ...>`를 추가하여 브라우저에 이 정보를 전달합니다. 여기서 `...`는 HTML의 버전입니다. HTML5는 `<!DOCTYPE html>`을 사용합니다.
 
-The `!` and uppercase `DOCTYPE` is important, especially for older browsers. The `html` is not case sensitive.
+`!`와 대문자로 된 `DOCTYPE`은 특히 오래된 브라우저를 위해 중요합니다. `html`은 대소문자를 구분하지 않습니다.
 
-Next, the rest of your HTML code needs to be wrapped in `html` tags. The opening `<html>` goes directly below the `<!DOCTYPE html>` line, and the closing `</html>` goes at the end of the page.
+다음은, HTML 코드가 `html` 태그에 감싸져야 합니다. 시작 `<html>` 태그는 `<!DOCTYPE html>` 하위에 위치하고 끝 `</html>`은 페이지의 끝에 위치하게 됩니다.
 
-Here's an example of the page structure. Your HTML code would go in the space between the two `html` tags.
+여기 페이지 구조에 대한 예시가 있습니다. HTML 코드는 두 개의 `html` 태그 사이에 있는 공간으로 가게 됩니다.
 
 ```html
 <!DOCTYPE html>
@@ -30,23 +30,23 @@ Here's an example of the page structure. Your HTML code would go in the space be
 
 # --instructions--
 
-Add a `DOCTYPE` tag for HTML5 to the top of the blank HTML document in the code editor. Under it, add opening and closing `html` tags, which wrap around an `h1` element. The heading can include any text.
+HTML5를 위한 `DOCTYPE` 태그를 코드 편집기의 빈 HTML 문서 상단에 추가하세요. 그 하위에 `h1`를 감싸는 `html`를 추가하시오 헤딩은 어느 글자든 포함할 수 있습니다.
 
 # --hints--
 
-Your code should include a `<!DOCTYPE html>` tag.
+코드에 `<!DOCTYPE html>` 태그가 있어야 합니다.
 
 ```js
 assert(code.match(/<!DOCTYPE\s+?html\s*?>/gi));
 ```
 
-There should be one `html` element.
+하나의 `html` 요소가 있어야 합니다.
 
 ```js
 assert($('html').length == 1);
 ```
 
-The `html` tags should wrap around one `h1` element.
+`html` 태그는 하나의 `h1` 요소를 감싸야 합니다.
 
 ```js
 assert(code.match(/<html>\s*?<h1>\s*?.*?\s*?<\/h1>\s*?<\/html>/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/define-the-head-and-body-of-an-html-document.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/define-the-head-and-body-of-an-html-document.md
index c847ac31fdf..a7de4a74b78 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/define-the-head-and-body-of-an-html-document.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/define-the-head-and-body-of-an-html-document.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78aa367417b2b2512aec
-title: Define the Head and Body of an HTML Document
+title: HTML 문서의 헤드와 바디 정의하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cra9bfP'
 forumTopicId: 301096
@@ -9,11 +9,11 @@ dashedName: define-the-head-and-body-of-an-html-document
 
 # --description--
 
-You can add another level of organization in your HTML document within the `html` tags with the `head` and `body` elements. Any markup with information about your page would go into the `head` tag. Then any markup with the content of the page (what displays for a user) would go into the `body` tag.
+HTML 문서 안에서 `head`와 `body` 요소로 `html` 태그 내에 다른 조직 단계를 추가할 수 있습니다. 페이지에 관한 정보를 가진 모든 마크업은 `head` 태그에 위치합니다. 그런 다음에 사용자에게 보여질 페이지 내용이 담긴 모든 마크업은 `body` 태그에 가게 됩니다.
 
-Metadata elements, such as `link`, `meta`, `title`, and `style`, typically go inside the `head` element.
+`link`, `meta`, `title` 그리고 `style`같은 메타데이터 요소들은 주로 `head` 요소로 가게 됩니다.
 
-Here's an example of a page's layout:
+여기 페이지 레이아웃에 대한 예시가 있습니다.
 
 ```html
 <!DOCTYPE html>
@@ -31,25 +31,25 @@ Here's an example of a page's layout:
 
 # --instructions--
 
-Edit the markup so there's a `head` and a `body`. The `head` element should only include the `title`, and the `body` element should only include the `h1` and `p`.
+`head`와 `body`가 있도록 마크업을 수정하시오. `head` 요소는 오직 `title`을 포함하고 `body` 요소는 오직 `h1`과 `p`를 포함해야 합니다.
 
 # --hints--
 
-There should be only one `head` element on the page.
+페이지에 하나의 `head` 요소만 있어야 합니다.
 
 ```js
 const headElems = code.replace(/\n/g, '').match(/\<head\s*>.*?\<\/head\s*>/g);
 assert(headElems && headElems.length === 1);
 ```
 
-There should be only one `body` element on the page.
+페이지에 하나의 `body` 요소만 있어야 합니다.
 
 ```js
 const bodyElems = code.replace(/\n/g, '').match(/<body\s*>.*?<\/body\s*>/g);
 assert(bodyElems && bodyElems.length === 1);
 ```
 
-The `head` element should be a child of the `html` element.
+`head` 요소는 `html` 요소의 자식 요소이어야 합니다.
 
 ```js
 const htmlChildren = code
@@ -64,7 +64,7 @@ if (htmlChildren) {
 assert(foundHead);
 ```
 
-The `body` element should be a child of the `html` element.
+`body` 요소는 `html` 요소의 자식 요소이어야 합니다.
 
 ```js
 const htmlChildren = code
@@ -78,7 +78,7 @@ if (htmlChildren) {
 assert(foundBody);
 ```
 
-The `head` element should wrap around the `title` element.
+`head` 요소는 `title` 요소를 감싸야 합니다.
 
 ```js
 const headChildren = code
@@ -92,7 +92,7 @@ if (headChildren) {
 assert(foundTitle);
 ```
 
-The `body` element should wrap around both the `h1` and `p` elements.
+`body` 요소는 `h1`과 `p` 요소를 감싸야 합니다.
 
 ```js
 const bodyChildren = code
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/delete-html-elements.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/delete-html-elements.md
index 8115f9ef35f..5885a05d599 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/delete-html-elements.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/delete-html-elements.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fed1348bd9aedf08833
-title: Delete HTML Elements
+title: HTML 요소 지우기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/ckK73C9'
 forumTopicId: 17559
@@ -9,29 +9,29 @@ dashedName: delete-html-elements
 
 # --description--
 
-Our phone doesn't have much vertical space.
+휴대전화에는 세로 공간이 많지 않습니다.
 
-Let's remove the unnecessary elements so we can start building our CatPhotoApp.
+고양이 사진 앱 (CatPhotoApp)을 만들 수 있도록 불필요한 요소를 제거하겠습니다.
 
 # --instructions--
 
-Delete your `h1` element so we can simplify our view.
+더 간단하게 볼 수 있도록 `h1` 요소를 제거하세요.
 
 # --hints--
 
-Your `h1` element should be deleted.
+`h1` 요소는 제거되어야 합니다.
 
 ```js
 assert(!code.match(/<h1>/gi) && !code.match(/<\/h1>/gi));
 ```
 
-Your `h2` element should be on the page.
+`h2` 요소는 그대로 있어야 합니다.
 
 ```js
 assert(code.match(/<h2>[\w\W]*<\/h2>/gi));
 ```
 
-Your `p` element should be on the page.
+`p` 요소는 그대로 있어야 합니다.
 
 ```js
 assert(code.match(/<p>[\w\W]*<\/p>/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/fill-in-the-blank-with-placeholder-text.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/fill-in-the-blank-with-placeholder-text.md
index b9a9509f8ea..d091688d36f 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/fill-in-the-blank-with-placeholder-text.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/fill-in-the-blank-with-placeholder-text.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08833
-title: Fill in the Blank with Placeholder Text
+title: 무작위 텍스트로 빈칸 채우기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cgR7Dc7'
 forumTopicId: 18178
@@ -9,19 +9,19 @@ dashedName: fill-in-the-blank-with-placeholder-text
 
 # --description--
 
-Web developers traditionally use <dfn>lorem ipsum text</dfn> as placeholder text. The lorem ipsum text is randomly scraped from a famous passage by Cicero of Ancient Rome.
+웹 개발자들은 오래전부터 <dfn>lorem ipsum text</dfn>를 무작위 텍스트로 이용했습니다. lorem ipsum text는 고대 로마의 키케로(Cicero)가 쓴 유명한 구절에서 무작위로 인용한 텍스트입니다.
 
-Lorem ipsum text has been used as placeholder text by typesetters since the 16th century, and this tradition continues on the web.
+Lorem ipsum text는 16세기부터 식자공들에 의해 무작위 텍스트로 사용되어왔으며 이 전통은 웹에서도 계속되고 있습니다.
 
-Well, 5 centuries is long enough. Since we're building a CatPhotoApp, let's use something called "kitty ipsum" text.
+하지만, 5세기 동안이나 이용되어 왔다면 쓰일 만큼 쓰였죠. 그래서 우리는 고양이 사진 앱 (CatPhotoApp)을 만들고 있으므로 "kitty ipsum" 이라는 텍스트를 사용하겠습니다.
 
 # --instructions--
 
-Replace the text inside your `p` element with the first few words of this kitty ipsum text: `Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.`
+`p` 요소 안의 텍스트를 kitty ipsum 텍스트의 처음 몇 단어로 바꾸세요: `Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.`
 
 # --hints--
 
-Your `p` element should contain the first few words of the provided "kitty ipsum" text.
+`p` 요소에는 제공된 "kitty ipsum" 텍스트의 처음 몇 단어가 포함되야 합니다.
 
 ```js
 assert.isTrue(/Kitty(\s)+ipsum/gi.test($('p').text()));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/headline-with-the-h2-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/headline-with-the-h2-element.md
index 7ad1af2e848..ba62ccbab5a 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/headline-with-the-h2-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/headline-with-the-h2-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf0887a
-title: Headline with the h2 Element
+title: h2 요소를 이용한 헤드라인
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cE8Gqf3'
 forumTopicId: 18196
@@ -9,25 +9,25 @@ dashedName: headline-with-the-h2-element
 
 # --description--
 
-Over the next few lessons, we'll build an HTML5 cat photo web app piece-by-piece.
+다음 몇 가지 강의를 통해 HTML5 고양이 사진 웹 앱을 조금씩 만들어 보려고 합니다.
 
-The `h2` element you will be adding in this step will add a level two heading to the web page.
+이 단계에서 추가 할 `h2` 요소는 웹 페이지에 두 번째 수준의 표제를 추가합니다.
 
-This element tells the browser about the structure of your website. `h1` elements are often used for main headings, while `h2` elements are generally used for subheadings. There are also `h3`, `h4`, `h5` and `h6` elements to indicate different levels of subheadings.
+이 요소는 브라우저에게 당신의 웹사이트의 구조를 알려 줍니다. `h1` 요소는 주로 제목에 사용되는 반면, `h2` 요소는 일반적으로 부제에 사용됩니다. 또한 다른 수준의 하위 부제를 나타내는 `h3`, `h4`, `h5` 및 `h6` 요소가 있습니다.
 
 # --instructions--
 
-Add an `h2` tag that says "CatPhotoApp" to create a second HTML element below your "Hello World" `h1` element.
+`h1` "Hello World" 아래에 "CatPhotoApp"이라는 `h2` 태그를 추가하여 두 번째 HTML 구성 요소를 만드세요.
 
 # --hints--
 
-You should create an `h2` element.
+`h2` 요소를 만들어야 합니다.
 
 ```js
 assert($('h2').length > 0);
 ```
 
-Your `h2` element should have a closing tag.
+`h2` 요소에는 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
@@ -36,19 +36,19 @@ assert(
 );
 ```
 
-Your `h2` element should have the text `CatPhotoApp`.
+`h2` 요소에는 `CatPhotoApp` 이라는 텍스트가 있어야 합니다.
 
 ```js
 assert.isTrue(/cat(\s)?photo(\s)?app/gi.test($('h2').text()));
 ```
 
-Your `h1` element should have the text `Hello World`.
+`h1` 요소에는 `Hello World` 라는 텍스트가 있어야 합니다.
 
 ```js
 assert.isTrue(/hello(\s)+world/gi.test($('h1').text()));
 ```
 
-Your `h1` element should be before your `h2` element.
+`h1`은 `h2`보다 앞에 있어야 합니다.
 
 ```js
 assert(code.match(/<h1>\s*?.*?\s*?<\/h1>\s*<h2>\s*?.*?\s*?<\/h2>/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/inform-with-the-paragraph-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/inform-with-the-paragraph-element.md
index 0d1eb0ef72d..2510ad5a259 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/inform-with-the-paragraph-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/inform-with-the-paragraph-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08801
-title: Inform with the Paragraph Element
+title: 문단 요소로 알리기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/ceZ7DtN'
 forumTopicId: 18202
@@ -9,9 +9,9 @@ dashedName: inform-with-the-paragraph-element
 
 # --description--
 
-The `p` element is the preferred element for paragraph text on websites. `p` is short for "paragraph".
+`p` 요소는 웹사이트의 문단 텍스트를 위한 선호되는 요소입니다. `p`는 문단(paragraph)의 줄임말 입니다.
 
-You can create a paragraph element like this:
+다음과 같이 문단 요소를 만들 수 있습니다:
 
 ```html
 <p>I'm a p tag!</p>
@@ -19,25 +19,25 @@ You can create a paragraph element like this:
 
 # --instructions--
 
-Create a `p` element below your `h2` element, and give it the text `Hello Paragraph`.
+`h2` 요소 아래에 `p` 요소를 만들고 `Hello Paragraph` 텍스트를 넣으세요.
 
-**Note:** As a convention, all HTML tags are written in lowercase, for example `<p></p>` and not `<P></P>`.
+**노트:** 관례상 모든 HTML 태그들은 소문자로 작성됩니다. 예를 들어 `<p></p>` 대신 `<P></P>`.
 
 # --hints--
 
-Your code should have a valid `p` element.
+코드에는 유효한 `p` 요소가 있어야 합니다.
 
 ```js
 assert($('p').length > 0);
 ```
 
-Your `p` element should have the text `Hello Paragraph`.
+`p` 요소에는 `Hello Paragraph` 라는 텍스트가 있어야 합니다.
 
 ```js
 assert.isTrue(/hello(\s)+paragraph/gi.test($('p').text()));
 ```
 
-Your `p` element should have a closing tag.
+`p` 요소에는 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/introduction-to-html5-elements.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/introduction-to-html5-elements.md
index d5b0ecf53d6..c480c02413f 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/introduction-to-html5-elements.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/introduction-to-html5-elements.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aecf08801
-title: Introduction to HTML5 Elements
+title: HTML5 요소 소개
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cBkZGpt7'
 forumTopicId: 301097
@@ -9,11 +9,11 @@ dashedName: introduction-to-html5-elements
 
 # --description--
 
-HTML5 introduces more descriptive HTML tags. These include `main`, `header`, `footer`, `nav`, `video`, `article`, `section` and others.
+HTML5는 더 세분된 HTML 태그를 도입합니다. 여기에는 `main`, `header`, `footer`, `nav`, `video`, `article`, `section` 이 포함됩니다.
 
-These tags give a descriptive structure to your HTML, make your HTML easier to read, and help with Search Engine Optimization (SEO) and accessibility. The `main` HTML5 tag helps search engines and other developers find the main content of your page.
+이러한 태그는 자세한 HTML 구조를 제공하고, HTML을 읽기 쉽게 만들고, 검색 엔진 최적화 (Search Engine Optimization, SEO) 및 접근성을 지원합니다. `main` HTML5 태그는 검색 엔진과 다른 개발자가 페이지의 주요 콘텐츠를 찾는 데 도움이 됩니다.
 
-Example usage, a `main` element with two child elements nested inside it:
+내부에 두 개의 하위 요소가 중첩된 `main` 요소 예시:
 
 ```html
 <main> 
@@ -22,23 +22,23 @@ Example usage, a `main` element with two child elements nested inside it:
 </main>
 ```
 
-**Note:** Many of the new HTML5 tags and their benefits are covered in the Applied Accessibility section.
+**노트:** 많은 새 HTML5 태그와 그 이점은 접근성 섹션에서 다룹니다.
 
 # --instructions--
 
-Create a second `p` element with the following kitty ipsum text: `Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy fur catnip scratched.`
+다음 kitty ipsum 텍스트를 사용하여 두 번째 `p` 요소를 만드세요. `Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy fur catnip scratched.`
 
-Then, create a `main` element and nest only the two `p` elements inside the `main` element.
+그 다음, `main` 요소를 만들고 `main` 요소 안에 두 개의 `p` 요소를 중첩하세요.
 
 # --hints--
 
-You should have 2 `p` elements with Kitty Ipsum text.
+Kitty Ipsum 텍스트가 있는 2개의 `p` 요소가 있어야 합니다.
 
 ```js
 assert($('p').length > 1);
 ```
 
-Each of your `p` elements should have a closing tag.
+모든 `p` 요소에는 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
@@ -47,31 +47,31 @@ assert(
 );
 ```
 
-Your `p` element should contain the first few words of the provided additional `kitty ipsum` text.
+`p` 요소는 제공된 `kitty ipsum` 텍스트의 처음 몇 단어를 포함해야 합니다.
 
 ```js
 assert.isTrue(/Purr\s+jump\s+eat/gi.test($('p').text()));
 ```
 
-Your code should have one `main` element.
+코드에는 `main` 요소가 있어야 합니다.
 
 ```js
 assert($('main').length === 1);
 ```
 
-The `main` element should have two paragraph elements as children.
+`main` 요소에는 두 개의 문단 요소가 중첩돼 있어야 합니다.
 
 ```js
 assert($('main').children('p').length === 2);
 ```
 
-The opening `main` tag should come before the first paragraph tag.
+`main`의 여는 태그는 첫 번째 문단 태그 앞에 와야 합니다.
 
 ```js
 assert(code.match(/<main>\s*?<p>/g));
 ```
 
-The closing `main` tag should come after the second closing paragraph tag.
+`main`의 닫는 태그는 두 번째 문단의 닫는 태그 뒤에 와야 합니다.
 
 ```js
 assert(code.match(/<\/p>\s*?<\/main>/g));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/link-to-external-pages-with-anchor-elements.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/link-to-external-pages-with-anchor-elements.md
index d21efdc86f8..2e1619bc696 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/link-to-external-pages-with-anchor-elements.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/link-to-external-pages-with-anchor-elements.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08816
-title: Link to External Pages with Anchor Elements
+title: 앵커 요소를 이용한 외부 페이지 링크
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/c8EkncB'
 forumTopicId: 18226
@@ -9,35 +9,35 @@ dashedName: link-to-external-pages-with-anchor-elements
 
 # --description--
 
-You can use `a` (*anchor*) elements to link to content outside of your web page.
+`a` (*앵커, anchor*) 요소를 이용해 웹페이지 외부의 콘텐츠에 연결할 수 있습니다.
 
-`a` elements need a destination web address called an `href` attribute. They also need anchor text. Here's an example:
+`a` 요소는 목적하는 외부 링크를 담을 수 있는 `href` 속성이 필요합니다. 그리고 앵커 텍스트 (실제로 웹 사용자들에게 표시되는 텍스트) 도 필요합니다. 예시:
 
 ```html
 <a href="https://www.freecodecamp.org">this links to freecodecamp.org</a>
 ```
 
-Then your browser will display the text `this links to freecodecamp.org` as a link you can click. And that link will take you to the web address `https://www.freecodecamp.org`.
+그러면 브라우저에 `this links to freecodecamp.org` 라는 텍스트가 클릭할 수 있는 링크로 표시됩니다. 그리고 그 링크는 웹 주소 `https://www.freecodecamp.org` 로 연결됩니다.
 
 # --instructions--
 
-Create an `a` element that links to `https://www.freecatphotoapp.com` and has "cat photos" as its anchor text.
+`https://www.freecatphotoapp.com`에 연결되고 앵커 텍스트로 "cat photos"가 있는 `a` 요소를 만드세요.
 
 # --hints--
 
-Your `a` element should have the anchor text of `cat photos`.
+`a` 요소에는 `cat photos`이라는 앵커 텍스트가 있어야 합니다.
 
 ```js
 assert(/cat photos/gi.test($('a').text()));
 ```
 
-You need an `a` element that links to `https://www.freecatphotoapp.com`
+`https://www.freecatphotoapp.com` 으로 연결되는 `a` 요소가 필요합니다.
 
 ```js
 assert(/^https?:\/\/(www\.)?freecatphotoapp\.com\/?$/i.test($('a').attr('href')));
 ```
 
-Your `a` element should have a closing tag.
+`a` 요소에는 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
@@ -68,9 +68,9 @@ assert(
 ```html
 <h2>CatPhotoApp</h2>
 <main>
-  
+
   <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back.">
-  
+
   <a href="https://www.freecatphotoapp.com">cat photos</a>
   <p>Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>
   <p>Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy fur catnip scratched.</p>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/link-to-internal-sections-of-a-page-with-anchor-elements.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/link-to-internal-sections-of-a-page-with-anchor-elements.md
index 6e2b5097e21..bbe6b61c004 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/link-to-internal-sections-of-a-page-with-anchor-elements.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/link-to-internal-sections-of-a-page-with-anchor-elements.md
@@ -1,6 +1,6 @@
 ---
 id: bad88fee1348bd9aedf08816
-title: Link to Internal Sections of a Page with Anchor Elements
+title: 앵커 요소를 이용한 페이지 내부를 연결하는 링크
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cyrDRUL'
 forumTopicId: 301098
@@ -9,11 +9,11 @@ dashedName: link-to-internal-sections-of-a-page-with-anchor-elements
 
 # --description--
 
-`a` (*anchor*) elements can also be used to create internal links to jump to different sections within a webpage.
+`a` (*anchor, 앵커*) 요소를 이용하여 웹페이지 내의 다른 섹션으로 이동하는 내부 링크를 생성할 수도 있습니다.
 
-To create an internal link, you assign a link's `href` attribute to a hash symbol `#` plus the value of the `id` attribute for the element that you want to internally link to, usually further down the page. You then need to add the same `id` attribute to the element you are linking to. An `id` is an attribute that uniquely describes an element.
+내부 링크를 생성하려면 링크의 `href` 속성에 해쉬 기호 `#` 와 연결하고 싶은 요소 (보통 멀리 떨어져 있는) 의 `id` 속성를 지정해야 합니다. 그런 다음 연결하려는 요소에 동일한 `id` 속성을 추가해야 합니다. `id`는 요소를 묘사하는 속성입니다.
 
-Below is an example of an internal anchor link and its target element:
+다음은 내부 앵커 링크 및 대상 요소의 예입니다:
 
 ```html
 <a href="#contacts-header">Contacts</a>
@@ -21,37 +21,37 @@ Below is an example of an internal anchor link and its target element:
 <h2 id="contacts-header">Contacts</h2>
 ```
 
-When users click the `Contacts` link, they'll be taken to the section of the webpage with the **Contacts** heading element.
+만약 사용자가 `Contacts` 링크를 클릭하면 **Contacts** 제목 요소가 있는 웹페이지 섹션으로 이동합니다.
 
 # --instructions--
 
-Change your external link to an internal link by changing the `href` attribute to `#footer` and the text from `cat photos` to `Jump to Bottom`.
+`href` 속성을 `#footer` 로 변경하고 텍스트를 `cat photos` 에서 `Jump to Bottom` 으로 변경하여 현재 존재하는 외부 링크를 내부 링크로 변경하세요.
 
-Remove the `target="_blank"` attribute from the anchor tag since this causes the linked document to open in a new window tab.
+앵커 태그의 `target="_blank"` 속성은 연결된 문서가 새 창 탭에서 열리게 하므로 이를 제거하세요.
 
-Then add an `id` attribute with a value of `footer` to the `<footer>` element at the bottom of the page.
+그런 다음 값이 `footer`인 `id` 속성을 페이지 하단의 `<footer>` 요소에 추가하세요.
 
 # --hints--
 
-There should be only one anchor tag on your page.
+페이지에는 하나의 앵커 태그만 있어야 합니다.
 
 ```js
 assert($('a').length == 1);
 ```
 
-There should be only one `footer` tag on your page.
+페이지에는 하나의 `footer` 태그만 있어야 합니다.
 
 ```js
 assert($('footer').length == 1);
 ```
 
-The `a` tag should have an `href` attribute set to "#footer".
+`a` 태그에는 "#footer"로 설정된 `href` 속성이 있어야 합니다.
 
 ```js
 assert($('a').eq(0).attr('href') == '#footer');
 ```
 
-The `a` tag should not have a `target` attribute.
+`a` 태그에는 `target` 속성이 없어야 합니다.
 
 ```js
 assert(
@@ -60,7 +60,7 @@ assert(
 );
 ```
 
-The `a` text should be "Jump to Bottom".
+`a` 요소의 텍스트는 "Jump to Bottom"이어야 합니다.
 
 ```js
 assert(
@@ -71,7 +71,7 @@ assert(
 );
 ```
 
-The `footer` tag should have an `id` attribute set to "footer".
+`footer` 태그에는 "footer"로 설정된 `id` 속성이 있어야 합니다.
 
 ```js
 assert($('footer').eq(0).attr('id') == 'footer');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/make-dead-links-using-the-hash-symbol.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/make-dead-links-using-the-hash-symbol.md
index 4408a309a56..543a556c8d3 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/make-dead-links-using-the-hash-symbol.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/make-dead-links-using-the-hash-symbol.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08817
-title: Make Dead Links Using the Hash Symbol
+title: '해시 기호 (#) 를 사용하여 없는 링크 만들기'
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cMdkytL'
 forumTopicId: 18230
@@ -9,19 +9,19 @@ dashedName: make-dead-links-using-the-hash-symbol
 
 # --description--
 
-Sometimes you want to add `a` elements to your website before you know where they will link.
+연결할 링크를 알기 전에 웹사이트에 `a` 요소를 추가하고 싶을 때가 있습니다.
 
-This is also handy when you're changing the behavior of a link using `JavaScript`, which we'll learn about later.
+이것은 나중에 배울 `JavaScript` (자바스크립트) 를 사용하여 링크의 종류을 변경할 때도 유용합니다.
 
 # --instructions--
 
-The current value of the `href` attribute is a link that points to "`https://www.freecatphotoapp.com`". Replace the `href` attribute value with a `#`, also known as a hash symbol, to create a dead link.
+`href` 속성은 현재 "`https://www.freecatphotoapp.com`"을 지정하고 있습니다. `href` 속성을 해시 기호라고도 하는 `#`로 교체하여 없는 링크를 생성하세요.
 
-For example: `href="#"`
+예시: `href="#"`
 
 # --hints--
 
-Your `a` element should be a dead link with the value of the `href` attribute set to "#".
+`a` 요소는 `href` 속성이 "#"으로 지정된 없는 링크여야 합니다.
 
 ```js
 assert($('a').attr('href') === '#');
@@ -49,9 +49,9 @@ assert($('a').attr('href') === '#');
 <h2>CatPhotoApp</h2>
 <main>
   <p>Click here to view more <a href="#" target="_blank">cat photos</a>.</p>
-  
+
   <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back.">
-  
+
   <p>Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>
   <p>Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy fur catnip scratched.</p>
 </main>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/nest-an-anchor-element-within-a-paragraph.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/nest-an-anchor-element-within-a-paragraph.md
index 2006c224b32..1594e9045b8 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/nest-an-anchor-element-within-a-paragraph.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/nest-an-anchor-element-within-a-paragraph.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aede08817
-title: Nest an Anchor Element within a Paragraph
+title: 문단 내에 앵커 요소 중첩하기
 challengeType: 0
 forumTopicId: 18244
 dashedName: nest-an-anchor-element-within-a-paragraph
@@ -8,7 +8,7 @@ dashedName: nest-an-anchor-element-within-a-paragraph
 
 # --description--
 
-You can nest links within other text elements.
+다른 텍스트 요소 내에 링크를 중첩할 수 있습니다.
 
 ```html
 <p>
@@ -16,41 +16,41 @@ You can nest links within other text elements.
 </p>
 ```
 
-Let's break down the example. Normal text is wrapped in the `p` element:
+예시를 살펴 보겠습니다. 일반 텍스트는 `p` 요소안에 있습니다.
 
 ```html
 <p> Here's a ... for you to follow. </p>
 ```
 
-Next is the *anchor* element `<a>` (which requires a closing tag `</a>`):  
+다음은 *앵커* 요소 `<a>`입니다 (닫는 태그 `</a>` 필요):
 
 ```html
 <a> ... </a>
 ```
 
-`target` is an anchor tag attribute that specifies where to open the link. The value `_blank` specifies to open the link in a new tab. The `href` is an anchor tag attribute that contains the URL address of the link:  
+`target`은 링크를 열 위치를 지정하는 앵커 태그의 속성입니다. `_blank` 는 새 탭에서 링크를 열도록 지정합니다. `href` 속성은 링크의 URL 주소를 포함하는 앵커 태그의 속성입니다:
 
 ```html
 <a href="https://www.freecodecamp.org" target="_blank"> ... </a>
 ```
 
-The text, `link to www.freecodecamp.org`, within the `a` element is called <dfn>anchor text</dfn>, and will display the link to click:
+`a` 요소 내의 `link to www.freecodecamp.org` 텍스트를 <dfn>anchor text </dfn>라고 하며 클릭할 수 링크를 표시합니다:
 
 ```html
 <a href=" ... " target="...">link to freecodecamp.org</a>
 ```
 
-The final output of the example will look like this:  
+예시의 최종 출력은 다음과 같습니다.
 
-Here's a <a href="https://www.freecodecamp.org" target="_blank">link to www.freecodecamp.org</a> for you to follow.
+여기 확인할 링크 <a href="https://www.freecodecamp.org" target="_blank">link to www.freecodecamp.org</a>가 있습니다.
 
 # --instructions--
 
-Nest the existing `a` element within a new `p` element. Do not create a new anchor tag. The new paragraph should have text that says `View more cat photos`, where `cat photos` is a link, and the rest is plain text.
+새 `p` 요소 내에 기존 `a` 요소를 중첩하세요. 새 앵커 태그를 생성하지 마세요. `cat photos`가 링크이며 나머지는 글자인 새로운 문단은 `View more cat photos`라는 글자를 가져야 합니다.
 
 # --hints--
 
-You should only have one `a` element.
+오직 하나의 `a` 요소만 있어야 합니다.
 
 ```js
 assert(
@@ -58,7 +58,7 @@ assert(
 );
 ```
 
-The `a` element should link to "`https://www.freecatphotoapp.com`".
+`a` 요소는 "`https://www.freecatphotoapp.com`"에 연결되어야 합니다.
 
 ```js
 assert(
@@ -66,7 +66,7 @@ assert(
 );
 ```
 
-Your `a` element should have the anchor text of `cat photos`
+`a` 요소는 `cat photos`라는 앵커 글자를 가져야 합니다.
 
 ```js
 assert(
@@ -76,13 +76,13 @@ assert(
 );
 ```
 
-You should create a new `p` element. There should be at least 3 total `p` tags in your HTML code.
+새로운 `p` 요소를 만들어야 합니다. HTML 코드에 적어도 3 개의 `p` 태그가 있어야 합니다.
 
 ```js
 assert($('p') && $('p').length > 2);
 ```
 
-Your `a` element should be nested within your new `p` element.
+`a` 요소는 새 `p` 요소 안에 중첩되어야 합니다.
 
 ```js
 assert(
@@ -90,7 +90,7 @@ assert(
 );
 ```
 
-Your `p` element should have the text `View more ` (with a space after it).
+`p` 요소는 (해당 글자 다음 여백이 있는) `View more` 글자를 가져야 합니다.
 
 ```js
 assert(
@@ -101,7 +101,7 @@ assert(
 );
 ```
 
-Your `a` element should <em>not</em> have the text `View more`.
+`a` 요소는 `View more` 글자를 가지지 <em>않아야</em> 합니다.
 
 ```js
 assert(
@@ -111,7 +111,7 @@ assert(
 );
 ```
 
-Each of your `p` elements should have a closing tag.
+`p` 요소 각각은 닫는 태그를 가져야 합니다.
 
 ```js
 assert(
@@ -121,7 +121,7 @@ assert(
 );
 ```
 
-Each of your `a` elements should have a closing tag.
+`a` 요소 각각은 닫는 태그를 가져야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/nest-many-elements-within-a-single-div-element.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/nest-many-elements-within-a-single-div-element.md
index 3458df10681..3a7313e0aa3 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/nest-many-elements-within-a-single-div-element.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/nest-many-elements-within-a-single-div-element.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aede08835
-title: Nest Many Elements within a Single div Element
+title: 하나의 div 요소 내에 여러 요소 중첩시키기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cNW4kC3'
 forumTopicId: 18246
@@ -9,39 +9,39 @@ dashedName: nest-many-elements-within-a-single-div-element
 
 # --description--
 
-The `div` element, also known as a division element, is a general purpose container for other elements.
+구분 요소인 `div` 요소는 다른 요소를 담는 일반 컨테이너 입니다.
 
-The `div` element is probably the most commonly used HTML element of all.
+`div` 요소는 가장 많이 쓰이는 HTML 요소일 것입니다.
 
-Just like any other non-self-closing element, you can open a `div` element with `<div>` and close it on another line with `</div>`.
+다른 자체 닫힘이 아닌 요소와 마찬가지로 `div` 요소를 `<div>`로 열 수 있으며 다른 줄에서 `</div>`로 닫을 수 있습니다.
 
 # --instructions--
 
-Nest your "Things cats love" and "Top 3 things cats hate" lists all within a single `div` element.
+하나의 `div` 요소 내에 "Things cats love"와 "Top 3 things cats hate" 목록을 중첩시키세요.
 
-Hint: Try putting your opening `div` tag above your "Things cats love" `p` element and your closing `div` tag after your closing `ol` tag so that both of your lists are within one `div`.
+힌트: "Things cats love" `p` 요소 위에 여는 `div` 그리고 `ol` 태그 다음에 닫는 `div` 넣어 두 목록이 하나의 `div`에 있도록 만들어보세요.
 
 # --hints--
 
-Your `p` elements should be nested inside your `div` element.
+`p` 요소는 `div` 요소 안에 중첩되어야 합니다.
 
 ```js
 assert($('div').children('p').length > 1);
 ```
 
-Your `ul` element should be nested inside your `div` element.
+`ul` 요소는 `div` 요소 안에 중첩되어야 합니다.
 
 ```js
 assert($('div').children('ul').length > 0);
 ```
 
-Your `ol` element should be nested inside your `div` element.
+`ol` 요소는 `div` 요소 안에 중첩되어야 합니다.
 
 ```js
 assert($('div').children('ol').length > 0);
 ```
 
-Your `div` element should have a closing tag.
+`div` 요소는 닫는 태그를 가져야 합니다.
 
 ```js
 assert(
@@ -92,7 +92,7 @@ assert(
 <h2>CatPhotoApp</h2>
 <main>
   <p>Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
   <div>
     <p>Things cats love:</p>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/say-hello-to-html-elements.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/say-hello-to-html-elements.md
index ce73f22e1b1..8ede6cca825 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/say-hello-to-html-elements.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/say-hello-to-html-elements.md
@@ -1,6 +1,6 @@
 ---
 id: bd7123c8c441eddfaeb5bdef
-title: Say Hello to HTML Elements
+title: HTML의 요소들 소개
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cE8Gpt2'
 forumTopicId: 18276
@@ -9,37 +9,37 @@ dashedName: say-hello-to-html-elements
 
 # --description--
 
-Welcome to freeCodeCamp's HTML coding challenges. These will walk you through web development step-by-step.
+FreeCodeCamp의 HTML 코딩 도전 과제에 오신 것을 환영합니다. 이 도전 과제들은 웹 개발 과정을 단계별로 안내합니다.
 
-First, you'll start by building a simple web page using HTML. You can edit code in your code editor, which is embedded into this web page.
+먼저, HTML을 사용하여 간단한 웹 페이지를 만드는 것으로 시작합니다. 이 웹 페이지에 포함 된 코드 편집기에서 코드를 편집 할 수 있습니다.
 
-Do you see the code in your code editor that says `<h1>Hello</h1>`? That's an HTML element.
+코드 편집기에서 `<h1>Hello</h1>`라고 적힌 코드가 보이시나요? 이것은 하나의 HTML 요소입니다.
 
-Most HTML elements have an opening tag and a closing tag.
+대부분의 HTML 요소들은 여는 태그와 닫는 태그가 있습니다.
 
-Opening tags look like this:
+여는 태그는 다음과 같습니다:
 
 ```html
 <h1>
 ```
 
-Closing tags look like this:
+닫는 태그는 다음과 같습니다.
 
 ```html
 </h1>
 ```
 
-The only difference between opening and closing tags is the forward slash after the opening bracket of a closing tag.
+여는 태그와 닫는 태그의 유일한 차이점은 닫는 태그의 여는 괄호 뒤의 슬래시(/) 입니다.
 
-Each challenge has tests you can run at any time by clicking the "Run tests" button. When you pass all tests, you'll be prompted to submit your solution and go to the next coding challenge.
+각 도전 과제에는 "테스트 실행(Run tests)" 버튼을 클릭하여 언제든지 실행할 수 있는 테스트가 있습니다. 만약 모든 테스트들이 통과한다면, 해결 방법을 제출하고 다음 도전 과제로 이동하라는 메시지가 표시됩니다.
 
 # --instructions--
 
-To pass the test on this challenge, change your `h1` element's text to say `Hello World`.
+이 도전 과제를 통과하려면, `h1` 요소의 텍스트를 `Hello World`로 바꾸세요.
 
 # --hints--
 
-Your `h1` element should have the text `Hello World`.
+`h1` 에는 `Hello World` 라는 텍스트가 있어야 합니다.
 
 ```js
 assert.isTrue(/hello(\s)+world/gi.test($('h1').text()));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/turn-an-image-into-a-link.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/turn-an-image-into-a-link.md
index bf5a53ebe44..f7065a728bb 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/turn-an-image-into-a-link.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/turn-an-image-into-a-link.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08820
-title: Turn an Image into a Link
+title: 이미지를 링크로 변환하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cRdBnUr'
 forumTopicId: 18327
@@ -9,37 +9,37 @@ dashedName: turn-an-image-into-a-link
 
 # --description--
 
-You can make elements into links by nesting them within an `a` element.
+`a` 요소 내에 요소를 중첩하여 링크로 만들 수 있습니다.
 
-Nest your image within an `a` element. Here's an example:
+`a` 요소 내에서 이미지를 중첩합니다. 예시:
 
 ```html
 <a href="#"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="Three kittens running towards the camera."></a>
 ```
 
-Remember to use `#` as your `a` element's `href` property in order to turn it into a dead link.
+`a` 요소에 없는 링크를 사용하려면 `href` 속성에 `#`를 지정해야 합니다.
 
 # --instructions--
 
-Place the existing image element within an `a` (*anchor*) element.
+기존 이미지 요소를 `a`(*앵커*) 요소 내에 배치하세요.
 
-Once you've done this, hover over your image with your cursor. Your cursor's normal pointer should become the link clicking pointer. The photo is now a link.
+이 작업을 마치면 마우스로 커서를 이미지 위로 이동하세요. 그러면 커서의 일반 포인터는 링크를 클릭할 수 있는 포인터가 되어야 합니다. 이 사진은 이제 링크입니다.
 
 # --hints--
 
-The existing `img` element should be nested within an `a` element.
+기존 `img` 요소는 `a` 요소 안에 중첩되어야 합니다.
 
 ```js
 assert($('a').children('img').length > 0);
 ```
 
-Your `a` element should be a dead link with a `href` attribute set to `#`.
+`a` 요소는 `href` 속성이 `#`로 지정된 없는 링크여야 합니다.
 
 ```js
 assert(new RegExp('#').test($('a').children('img').parent().attr('href')));
 ```
 
-Each of your `a` elements should have a closing tag.
+모든 `a` 요소에는 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
@@ -71,9 +71,9 @@ assert(
 <h2>CatPhotoApp</h2>
 <main>
   <p>Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
-  
+
   <p>Kitty ipsum dolor sit amet, shed everywhere shed everywhere stretching attack your ankles chase the red dot, hairball run catnip eat the grass sniff.</p>
   <p>Purr jump eat the grass rip the couch scratched sunbathe, shed everywhere rip the couch sleep in the sink fluffy fur catnip scratched.</p>
 </main>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/uncomment-html.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/uncomment-html.md
index bb302c673f9..d5b6292065e 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/uncomment-html.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/uncomment-html.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedf08802
-title: Uncomment HTML
+title: HTML 주석 해제하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cBmG9T7'
 forumTopicId: 18329
@@ -9,37 +9,37 @@ dashedName: uncomment-html
 
 # --description--
 
-Commenting is a way that you can leave comments for other developers within your code without affecting the resulting output that is displayed to the end user.
+주석 달기는 웹 사용자에게는 보이지 않게 하면서 코드 내에서 다른 개발자를 위해 주석을 남길 수 있는 방법입니다.
 
-Commenting is also a convenient way to make code inactive without having to delete it entirely.
+주석 달기는 코드를 완전히 삭제하지 않고도 코드를 비활성화할 수 있는 편리한 방법이기도 합니다.
 
-Comments in HTML start with `<!--` and end with a `-->`
+HTML 주석은 `<!--` 로 시작하고 `-->`로 끝납니다.
 
 # --instructions--
 
-Uncomment your `h1`, `h2` and `p` elements.
+`h1`, `h2` 와 `p`의 주석을 해제하세요.
 
 # --hints--
 
-Your `h1` element should be visible on the page by uncommenting it.
+`h1` 요소가 주석이 제거되어 페이지에 표시되어야 합니다.
 
 ```js
 assert($('h1').length > 0);
 ```
 
-Your `h2` element should be visible on the page by uncommenting it.
+`h2` 요소가 주석이 제거되어 페이지에 표시되어야 합니다.
 
 ```js
 assert($('h2').length > 0);
 ```
 
-Your `p` element should be visible on the page by uncommenting it.
+`p` 요소가 주석이 제거되어 페이지에 표시되어야 합니다.
 
 ```js
 assert($('p').length > 0);
 ```
 
-No trailing comment tags should be visible on the page (i.e. `-->`).
+페이지에 주석이 표시되지 않아야 합니다 (예: `-->`).
 
 ```js
 assert(!$('*:contains("-->")')[1]);
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/use-html5-to-require-a-field.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/use-html5-to-require-a-field.md
index 94c726f268f..040c3c56786 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/use-html5-to-require-a-field.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/use-html5-to-require-a-field.md
@@ -1,6 +1,6 @@
 ---
 id: bad87fee1348bd9aedc08830
-title: Use HTML5 to Require a Field
+title: 필드를 필수로 만들기 위한 HTML5 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVMPUv/cMd4EcQ'
 forumTopicId: 18360
@@ -9,19 +9,19 @@ dashedName: use-html5-to-require-a-field
 
 # --description--
 
-You can require specific form fields so that your user will not be able to submit your form until he or she has filled them out.
+특정 필드를 필수로 만들어 사용자가 해당 필드를 채울 때까지 폼을 전달하지 못하도록 만들 수 있습니다.
 
-For example, if you wanted to make a text input field required, you can just add the attribute `required` within your `input` element, like this: `<input type="text" required>`
+예를 들면 글자 입력 필드를 필수로 만들고 싶다면 다음과 같이 `input` 요소에 `required` 속성을 추가하면 됩니다: `<input type="text" required>`
 
 # --instructions--
 
-Make your text `input` a `required` field, so that your user can't submit the form without completing this field.
+글자 `input`을 `required` 필드로 만들어 사용자가 해당 필드를 채우기 전까지 폼을 전달하지 못하도록 만드세요.
 
-Then try to submit the form without inputting any text. See how your HTML5 form notifies you that the field is required?
+그런 다음 글자 입력 없이 폼을 제출해보세요. HTML5 폼이 어떻게 필수 필드임을 알리는지 확인하세요.
 
 # --hints--
 
-Your text `input` element should have the `required` attribute.
+글자 `input` 요소는 `required` 속성을 가져야 합니다.
 
 ```js
 assert($('input').prop('required'));
@@ -63,9 +63,9 @@ assert($('input').prop('required'));
 <h2>CatPhotoApp</h2>
 <main>
   <p>Click here to view more <a href="#">cat photos</a>.</p>
-  
+
   <a href="#"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
-  
+
   <p>Things cats love:</p>
   <ul>
     <li>cat nip</li>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/use-the-value-attribute-with-radio-buttons-and-checkboxes.md b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/use-the-value-attribute-with-radio-buttons-and-checkboxes.md
index 79dbae43b43..ece0b939493 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/use-the-value-attribute-with-radio-buttons-and-checkboxes.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/basic-html-and-html5/use-the-value-attribute-with-radio-buttons-and-checkboxes.md
@@ -1,6 +1,6 @@
 ---
 id: 5c6c06847491271903d37cfd
-title: Use the value attribute with Radio Buttons and Checkboxes
+title: 라디오 버튼과 체크 박스로 value 속성 사용하기
 challengeType: 0
 forumTopicId: 301099
 dashedName: use-the-value-attribute-with-radio-buttons-and-checkboxes
@@ -8,9 +8,9 @@ dashedName: use-the-value-attribute-with-radio-buttons-and-checkboxes
 
 # --description--
 
-When a form gets submitted, the data is sent to the server and includes entries for the options selected. Inputs of type `radio` and `checkbox` report their values from the `value` attribute.
+폼이 제출될 때 데이터가 서버에 보내지고 선택된 것에 대한 항목이 포함됩니다. `radio`와 `checkbox` 입력은 `value` 속성으로부터 값을 알립니다.
 
-For example:
+예시:
 
 ```html
 <label for="indoor">
@@ -21,17 +21,17 @@ For example:
 </label>
 ```
 
-Here, you have two `radio` inputs. When the user submits the form with the `indoor` option selected, the form data will include the line: `indoor-outdoor=indoor`. This is from the `name` and `value` attributes of the "indoor" input.
+여기 두 `radio` 입력이 있습니다. 사용자가 `indoor`를 선택한 폼을 제출할 때 폼 데이터는 다음을 포함할 것입니다: `indoor-outdoor=indoor`. "indoor" input의 `name`과 `value` 속성으로부터 얻은 것입니다.
 
-If you omit the `value` attribute, the submitted form data uses the default value, which is `on`. In this scenario, if the user clicked the "indoor" option and submitted the form, the resulting form data would be `indoor-outdoor=on`, which is not useful. So the `value` attribute needs to be set to something to identify the option.
+만약 `value` 속성을 제거한다면 제출된 폼데이터는 기본 값인 `on`을 사용할 것입니다. 이 경우에 사용자가 "indoor"를 선택하고 폼을 제출했다면 폼 데이터 결과는 `indoor-outdoor=on`이 될 것이며 이는 유용한 정보가 아닙니다. 그래서 선택지가 무엇인지 알수 있도록 `value` 속성을 설정해주어야 합니다.
 
 # --instructions--
 
-Give each of the existing `radio` and `checkbox` inputs the `value` attribute. Do not create any new radio or checkbox elements. Use the input label text, in lowercase, as the value for the attribute.
+기존 `radio`와 `checkbox` 입력에 `value` 속성을 주세요. 새로운 radio나 checkbox 요소를 생성하지 마시기 바랍니다. 해당 속성의 값으로 소문자인 입력 레이블 글자를 사용하세요.
 
 # --hints--
 
-One of your radio buttons should have the `value` attribute of `indoor`.
+라디오 버튼 중 하나는 `indoor`라는 `value` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -40,7 +40,7 @@ assert(
 );
 ```
 
-One of your radio buttons should have the `value` attribute of `outdoor`.
+라디오 버튼 중 하나는 `outdoor`이라는 `value` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -50,7 +50,7 @@ assert(
 );
 ```
 
-One of your checkboxes should have the `value` attribute of `loving`.
+체크박스 중 하나는 `loving`이라는 `value` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -60,7 +60,7 @@ assert(
 );
 ```
 
-One of your checkboxes should have the `value` attribute of `lazy`.
+체크박스 중 하나는 `lazy`라는 `value` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -69,7 +69,7 @@ assert(
 );
 ```
 
-One of your checkboxes should have the `value` attribute of `energetic`.
+체크박스 중 하나는 `energetic`이라는 `value` 속성을 가져야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/add-flex-superpowers-to-the-tweet-embed.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/add-flex-superpowers-to-the-tweet-embed.md
index a57c1732b64..536d0bd7a4e 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/add-flex-superpowers-to-the-tweet-embed.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/add-flex-superpowers-to-the-tweet-embed.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ab367417b2b2512af1
-title: Add Flex Superpowers to the Tweet Embed
+title: 트윗 임베드에 플렉스 능력 추가하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/c9W7MhM'
 forumTopicId: 301100
@@ -9,59 +9,59 @@ dashedName: add-flex-superpowers-to-the-tweet-embed
 
 # --description--
 
-To the right is the tweet embed that will be used as a practical example. Some of the elements would look better with a different layout. The last challenge demonstrated `display: flex`. Here you'll add it to several components in the tweet embed to start adjusting their positioning.
+실례로 사용될 트윗 임베드가 오른쪽에 있습니다. 일부 요소들은 다른 레이아웃으로 더 나아 보일 것입니다. 이전 과제에서 `display: flex`를 설명했습니다. 트윗 임베드의 위치 조정을 위해 그 안에 있는 여러 컴포넌트에 이를 추가할 것입니다.
 
 # --instructions--
 
-Add the CSS property `display: flex` to all of the following items - note that the selectors are already set up in the CSS:
+다음 모든 아이템에 `display: flex` 속성을 추가하시오 - 셀렉터는 이미 CSS에 설정되어 있음에 주의하십시오.
 
-`header`, the header's `.profile-name`, the header's `.follow-btn`, the header's `h3` and `h4`, the `footer`, and the footer's `.stats`.
+`header`, 헤더의 `.profile-name`, 헤더의 `.follow-btn`, 헤더의 `h3` and `h4`, `footer`, 푸터의 `.stats`.
 
 # --hints--
 
-Your `.follow-btn` should be rendered on the page. Be sure to turn off any extensions such as ad blockers.
+`.follow-btn`는 페이지에 렌더링 되어야 합니다. 광고 차단기 같은 모든 확장 프로그램은 꺼야 합니다.
 
 ```js
 assert($('.follow-btn').length > 0 && $('.follow-btn').css('display') !== 'none');
 ```
 
-Your `header` should have a `display` property set to `flex`.
+`header`는 `flex`로 설정된 `display` 속성을 가져야 합니다.
 
 ```js
 assert($('header').css('display') == 'flex');
 ```
 
-Your `footer` should have a `display` property set to `flex`.
+`footer`는 `flex`로 설정된 `display` 속성을 가져야 합니다.
 
 ```js
 assert($('footer').css('display') == 'flex');
 ```
 
-Your `h3` should have a `display` property set to `flex`.
+`h3`는 `flex`로 설정된 `display` 속성을 가져야 합니다.
 
 ```js
 assert($('h3').css('display') == 'flex');
 ```
 
-Your `h4` should have a `display` property set to `flex`.
+`h4`는 `flex`로 설정된 `display` 속성을 가져야 합니다.
 
 ```js
 assert($('h4').css('display') == 'flex');
 ```
 
-Your `.profile-name` should have a `display` property set to `flex`.
+`.profile-name`는 `flex`로 설정된 `display` 속성을 가져야 합니다.
 
 ```js
 assert($('.profile-name').css('display') == 'flex');
 ```
 
-Your `.follow-btn` should have a `display` property set to `flex`.
+`.follow-btn`는 `flex`로 설정된 `display` 속성을 가져야 합니다.
 
 ```js
 assert($('.follow-btn').css('display') == 'flex');
 ```
 
-Your `.stats` should have a `display` property set to `flex`.
+`.stats`는 `flex`로 설정된 `display` 속성을 가져야 합니다.
 
 ```js
 assert($('.stats').css('display') == 'flex');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/align-elements-using-the-align-items-property.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/align-elements-using-the-align-items-property.md
index c285cfb7453..693cf8dec1d 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/align-elements-using-the-align-items-property.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/align-elements-using-the-align-items-property.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ad367417b2b2512af8
-title: Align Elements Using the align-items Property
+title: align-items 속성으로 요소 정렬하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/c8aggtk'
 forumTopicId: 301101
@@ -9,26 +9,26 @@ dashedName: align-elements-using-the-align-items-property
 
 # --description--
 
-The `align-items` property is similar to `justify-content`. Recall that the `justify-content` property aligned flex items along the main axis. For rows, the main axis is a horizontal line and for columns it is a vertical line.
+`align-items` 속성은 `justify-content`와 유사합니다. `justify-content` 속성은 주축을 따라 플렉스 아이템을 정렬시킨다는 것을 배웠습니다. 행의 주축이 수평선이고 열의 주축은 수직선입니다.
 
-Flex containers also have a **cross axis** which is the opposite of the main axis. For rows, the cross axis is vertical and for columns, the cross axis is horizontal.
+플렉스 컨테이너는 주축과는 반대인 **교차 축**도 있습니다. 행의 교차 축은 수직이고 열의 교차 축은 수평입니다.
 
-CSS offers the `align-items` property to align flex items along the cross axis. For a row, it tells CSS how to push the items in the entire row up or down within the container. And for a column, how to push all the items left or right within the container.
+CSS는 교차 축을 따라 플렉스 아이템을 정렬시키도록 `align-items` 속성을 제공합니다. 이 속성은 행에 대해 컨테이너 내 전체 행에 있는 아이템들을 위 아래로 어떻게 넣는지 결정합니다. 그리고 열에 대해 컨테이너 내 모든 아이템을 어떻게 좌우로 넣는지 결정합니다.
 
-The different values available for `align-items` include:
+`align-items`에 이용 가능한 값들은 다음과 같습니다.
 
-<ul><li><code>flex-start</code>: aligns items to the start of the flex container. For rows, this aligns items to the top of the container. For columns, this aligns items to the left of the container.</li><li><code>flex-end</code>: aligns items to the end of the flex container. For rows, this aligns items to the bottom of the container. For columns, this aligns items to the right of the container.</li><li><code>center</code>: align items to the center. For rows, this vertically aligns items (equal space above and below the items). For columns, this horizontally aligns them (equal space to the left and right of the items).</li><li><code>stretch</code>: stretch the items to fill the flex container. For example, rows items are stretched to fill the flex container top-to-bottom. This is the default value if no <code>align-items</code> value is specified.</li><li><code>baseline</code>: align items to their baselines. Baseline is a text concept, think of it as the line that the letters sit on.</li></ul>
+<ul><li><code>flex-start</code>: 플렉스 컨테이너의 시작에 아이템 정렬 행에 대해 이 값은 컨테이너 상단에 아이템을 정렬시킵니다. 열에 대해 이 값은 컨테이너의 좌측에 아이템을 정렬시킵니다.</li><li><code>flex-end</code>: 플렉스 컨테이너의 끝에 아이템 정렬. 행에 대해 이 값은 컨테이너의 하단에 아이템을 정렬시킵니다. 열에 대해 이 값은 컨테이너 우측에 아이템을 정렬시킵니다.</li><li><code>center</code>: 중앙에 아이템을 정렬. 행에 대해 이 값은 수직으로 아이템을 정렬시킵니다(아이템 위아래로 동일한 간격). 열에 대해 이 값은 수평으로 아이템을 정렬시킵니다(아이템의 좌우에 동일한 간격).</li><li><code>stretch</code>: 플렉스 컨테이너를 채우도록 아이템을 늘림. 예를 들면 행의 아이템은 위아래로 플렉스 컨테이너를 채우도록 늘어납니다. <code>align-items</code> 값이 특정되지 않는다면 이 값은 기본값으로 설정됩니다.</li><li><code>baseline</code>: 아이템의 베이스라인에 아이템을 정렬. 베이스 라인은 텍스트 개념으로, 글자가 올라가 있는 선으로 생각할 수 있습니다.</li></ul>
 
 # --instructions--
 
-An example helps show this property in action. Add the CSS property `align-items` to the `#box-container` element, and give it a value of `center`.
+이 속성을 실제로 보여주는 예시가 도움이 됩니다. `#box-container` 요소에 `align-items` 속성을 추가하고 `center` 값을 주세요.
 
-**Bonus**  
-Try the other options for the `align-items` property in the code editor to see their differences. But note that a value of `center` is the only one that will pass this challenge.
+**보너스**  
+차이 확인을 위해 코드 편집기에 있는 `align-items` 속성에 다른 값을 주세요. 하지만 `center`만이 이 과제를 통과시킬 수 있는 값이라는 것에 주의하시오.
 
 # --hints--
 
-The `#box-container` element should have an `align-items` property set to a value of `center`.
+`#box-container` 요소는 `center` 값으로 설정된 `align-items` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-container').css('align-items') == 'center');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/align-elements-using-the-justify-content-property.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/align-elements-using-the-justify-content-property.md
index 96fa19d0ece..ffb9d205d8f 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/align-elements-using-the-justify-content-property.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/align-elements-using-the-justify-content-property.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ac367417b2b2512af6
-title: Align Elements Using the justify-content Property
+title: justify-content 속성으로 요소 정렬하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/c43gnHm'
 forumTopicId: 301102
@@ -9,26 +9,26 @@ dashedName: align-elements-using-the-justify-content-property
 
 # --description--
 
-Sometimes the flex items within a flex container do not fill all the space in the container. It is common to want to tell CSS how to align and space out the flex items a certain way. Fortunately, the `justify-content` property has several options to do this. But first, there is some important terminology to understand before reviewing those options.
+플렉스 컨테이너 내 플렉스 아이템은 종종 컨테이너 안의 모든 공간을 채우지 않습니다. CSS로 플렉스 아이템을 특정한 방식으로 정렬하고 간격을 조절하는 것은 일반적입니다. 다행히도 `justify-content` 속성은 이를 위해 여러 선택지를 가지고 있습니다. 하지만 이러한 선택지들을 살펴보기 전에 우선 이해해야 할 중요한 용어가 있습니다.
 
-<a href="https://www.freecodecamp.org/news/flexbox-the-ultimate-css-flex-cheatsheet/" target="_blank" rel="noopener noreferrer nofollow">For more info about flex-box properties read here</a>
+<a href="https://www.freecodecamp.org/news/flexbox-the-ultimate-css-flex-cheatsheet/" target="_blank" rel="noopener noreferrer nofollow">플렉스 박스 속성에 대한 더 많은 정보는 여기를 읽어보십시오.</a>
 
-Recall that setting a flex container as a row places the flex items side-by-side from left-to-right. A flex container set as a column places the flex items in a vertical stack from top-to-bottom. For each, the direction the flex items are arranged is called the **main axis**. For a row, this is a horizontal line that cuts through each item. And for a column, the main axis is a vertical line through the items.
+플렉스 컨테이너를 행으로 설정하는 것은 플렉스 아이템을 좌우로 배치한다는 것을 기억하세요. 열로 설정된 플렉스 컨테이너는 플렉스 아이템을 위에서 아래로 수직 배치합니다. 각각의 경우에 플렉스 아이템이 배열된 방향을 **주축**이라고 부릅니다. 행에 대해 각 아이템을 통과하는 수평선이 주축입니다. 그리고 열에 대해 주축은 아이템에 수직인 선입니다.
 
-There are several options for how to space the flex items along the line that is the main axis. One of the most commonly used is `justify-content: center;`, which aligns all the flex items to the center inside the flex container. Other options include:
+주축인 선에 따라 플렉스 아이템을 놓는 방법에 대해 여러 선택지가 있습니다. 가장 많이 사용되는 것은 `justify-content: center;`인데 이는 모든 플렉스 아이템을 플렉스 컨테이너의 중앙에 정렬시킵니다. 다른 선택지는 다음과 같습니다.
 
-<ul><li><code>flex-start</code>: aligns items to the start of the flex container. For a row, this pushes the items to the left of the container. For a column, this pushes the items to the top of the container. This is the default alignment if no <code>justify-content</code> is specified.</li><li><code>flex-end</code>: aligns items to the end of the flex container. For a row, this pushes the items to the right of the container. For a column, this pushes the items to the bottom of the container.</li><li><code>space-between</code>: aligns items to the center of the main axis, with extra space placed between the items. The first and last items are pushed to the very edge of the flex container. For example, in a row the first item is against the left side of the container, the last item is against the right side of the container, then the remaining space is distributed evenly among the other items.</li><li><code>space-around</code>: similar to <code>space-between</code> but the first and last items are not locked to the edges of the container, the space is distributed around all the items with a half space on either end of the flex container.</li><li><code>space-evenly</code>: Distributes space evenly between the flex items with a full space at either end of the flex container.</li></ul>
+<ul><li><code>flex-start</code>: 플렉스 컨테이너 시작에 아이템 정렬. 행에 대해 이 설정은 컨테이너의 좌측에 아이템을 넣습니다. 열에 대해 이 설정은 컨테이너의 상단에 아이템을 넣습니다. <code>justify-content</code>가 특정되지 않았다면 이 설정이 디폴트 값입니다.</li><li><code>flex-end</code>: 플렉스 컨테이너 끝에 아이템을 정렬. 행에 대해 이 설정은 컨테이너의 우측에 아이템을 넣습니다. 열에 대해 이 설정은 컨테이너의 하단에 아이템을 넣습니다.</li><li><code>space-between</code>: 아이템 사이에 배치된 여분의 공간을 포함하여 주축의 중앙에 아이템을 정렬. 첫번째와 마지막 아이템은 플렉스 컨테이너의 가장자리로 밀려나갑니다. 예를 들어, 행에서 첫 번째 아이템은 컨테이너의 왼쪽에 붙어 있고, 마지막 아이템은 컨테이너의 오른쪽에 붙어 있으며, 나머지 공간은 다른 아이템들 사이에 균등하게 분배됩니다.</li><li><code>space-around</code>: <code>space-between</code>와 유사하나 첫번째와 마지막 아이템은 컨테이너 가장자리에 묶이지 않고 공간은 플렉스 컨테이너 양 끝에 반 공간씩을 포함하여 모든 아이템 주위에 균등하게 분배됩니다.</li><li><code>space-evenly</code>: 플렉스 아이템 사이에 공간을 양 끝에 전체 공간을 포함하여 균등하게 분배.</li></ul>
 
 # --instructions--
 
-An example helps show this property in action. Add the CSS property `justify-content` to the `#box-container` element, and give it a value of `center`.
+예제를 통해 이 속성이 어떻게 작동하는지 볼 수 있습니다. `#box-container` 요소에 `justify-content` 속성을 추가하고 `center` 값을 지정하세요.
 
-**Bonus**  
-Try the other options for the `justify-content` property in the code editor to see their differences. But note that a value of `center` is the only one that will pass this challenge.
+**보너스**  
+차이 확인을 위해 코드 편집기에서 `justify-content` 속성에 다른 값을 주세요. 하지만 `center` 값만이 이 과제를 통과할 수 있는 값이라는 것에 주의하세요.
 
 # --hints--
 
-The `#box-container` element should have a `justify-content` property set to a value of `center`.
+`#box-container` 요소는 `center`로 설정된 `justify-content` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-container').css('justify-content') == 'center');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-a-column-in-the-tweet-embed.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-a-column-in-the-tweet-embed.md
index ae884b649af..422ace6d1bb 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-a-column-in-the-tweet-embed.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-a-column-in-the-tweet-embed.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ac367417b2b2512af5
-title: Apply the flex-direction Property to Create a Column in the Tweet Embed
+title: 트윗 임베드에 열을 만들기 위해 flex-direction 속성 적용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/cnzdVC9'
 forumTopicId: 301103
@@ -9,21 +9,21 @@ dashedName: apply-the-flex-direction-property-to-create-a-column-in-the-tweet-em
 
 # --description--
 
-The tweet embed `header` and `footer` used the `flex-direction` property earlier with a row value. Similarly, the items inside the `.profile-name` element would work well stacked as a column.
+트윗 임베드 `header`와 `footer`는 row 값을 가진 `flex-direction` 속성을 사용했습니다. 마찬가지로 `.profile-name` 요소 안에 있는 아이템은 열로 정렬되며 잘 동작할 것입니다.
 
 # --instructions--
 
-Add the CSS property `flex-direction` to the header's `.profile-name` element and set the value to `column`.
+헤더의 `.profile-name` 요소에 `flex-direction` 속성을 추가하고 `column` 값을 주시오.
 
 # --hints--
 
-Your `.follow-btn` should be rendered on the page. Be sure to turn off any extensions such as ad blockers.
+`.follow-btn`는 페이지에 렌더링되어야 합니다. 광고 차단기 같은 확장 프로그램은 꺼야합니다.
 
 ```js
 assert($('.follow-btn').length > 0 && $('.follow-btn').css('display') !== 'none');
 ```
 
-The `.profile-name` element should have a `flex-direction` property set to `column`.
+`.profile-name` 요소는 `column`로 설정된 `flex-direction` 속성을 가져야 합니다.
 
 ```js
 assert($('.profile-name').css('flex-direction') == 'column');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-rows-in-the-tweet-embed.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-rows-in-the-tweet-embed.md
index 8458c968c3d..23e297bb301 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-rows-in-the-tweet-embed.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/apply-the-flex-direction-property-to-create-rows-in-the-tweet-embed.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ab367417b2b2512af3
-title: Apply the flex-direction Property to Create Rows in the Tweet Embed
+title: 트윗 임베드에 행을 만들기 위해 flex-direction 속성 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/cJb8yuq'
 forumTopicId: 301104
@@ -9,27 +9,27 @@ dashedName: apply-the-flex-direction-property-to-create-rows-in-the-tweet-embed
 
 # --description--
 
-The `header` and `footer` in the tweet embed example have child items that could be arranged as rows using the `flex-direction` property. This tells CSS to align the children horizontally.
+트윗 임베드 예시에 있는 `header`와 `footer`는 `flex-direction` 속성을 사용하여 행으로 배치될 수 있는 자식 아이템을 가지고 있습니다. 이는 CSS에게 자식 요소들을 수평으로 정렬하도록 지시합니다.
 
 # --instructions--
 
-Add the CSS property `flex-direction` to both the `header` and `footer` and set the value to `row`.
+`header`와 `footer`에 `flex-direction` 속성을 추가하고 `row` 값을 주시오.
 
 # --hints--
 
-Your `.follow-btn` should be rendered on the page. Be sure to turn off any extensions such as ad blockers.
+`.follow-btn`는 페이지에 렌더링되어야 합니다. 광고 차단기 같은 확장 프로그램은 꺼야합니다.
 
 ```js
 assert($('.follow-btn').length > 0 && $('.follow-btn').css('display') !== 'none');
 ```
 
-The `header` should have a `flex-direction` property set to `row`.
+`header`는 `row`로 설정된 `flex-direction` 속성을 가져야 합니다.
 
 ```js
 assert(code.match(/header\s*?{[^}]*?flex-direction:\s*?row;/g));
 ```
 
-The `footer` should have a `flex-direction` property set to `row`.
+`footer`는 `row`로 설정된 `flex-direction` 속성을 가져야 합니다.
 
 ```js
 assert(code.match(/footer\s*?{[^}]*?flex-direction:\s*?row;/g));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-display-flex-to-position-two-boxes.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-display-flex-to-position-two-boxes.md
index 501416b7c2f..cd54a1a8d02 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-display-flex-to-position-two-boxes.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-display-flex-to-position-two-boxes.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ab367417b2b2512af0
-title: 'Use display: flex to Position Two Boxes'
+title: '두 상자 배치를 위해 display: flex 사용하기'
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/cgz3QS7'
 forumTopicId: 301105
@@ -9,17 +9,17 @@ dashedName: use-display-flex-to-position-two-boxes
 
 # --description--
 
-This section uses alternating challenge styles to show how to use CSS to position elements in a flexible way. First, a challenge will explain theory, then a practical challenge using a simple tweet component will apply the flexbox concept.
+이번 장에서는 요소들을 유연하게 배치하도록 CSS를 어떻게 사용하는지 알아보기 위해 교차하면서 도전적인 스타일을 사용합니다. 우선 과제는 이론을 설명하고 간단한 트윗 컴포넌트를 사용하는 실제 과제는 flexbox 개념을 적용할 것입니다.
 
-Placing the CSS property `display: flex;` on an element allows you to use other flex properties to build a responsive page.
+요소에 `display: flex;` 속성을 주는 것은 반응형 페이지를 만들도록 다른 플렉스 속성을 사용할 수 있게 해줍니다.
 
 # --instructions--
 
-Add the CSS property `display` to `#box-container` and set its value to `flex`.
+`#box-container`에 `display` 속성을 추가하고 `flex` 값을 주세요.
 
 # --hints--
 
-`#box-container` should have the `display` property set to a value of `flex`.
+`#box-container`는 `flex` 값을 가진 `display` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-container').css('display') == 'flex');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-align-items-property-in-the-tweet-embed.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-align-items-property-in-the-tweet-embed.md
index 98b3d28d957..dd7c5cad253 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-align-items-property-in-the-tweet-embed.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-align-items-property-in-the-tweet-embed.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ad367417b2b2512af9
-title: Use the align-items Property in the Tweet Embed
+title: 트윗 임베드 align-items 속성 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/cd3PNfq'
 forumTopicId: 301106
@@ -9,21 +9,21 @@ dashedName: use-the-align-items-property-in-the-tweet-embed
 
 # --description--
 
-The last challenge introduced the `align-items` property and gave an example. This property can be applied to a few tweet embed elements to align the flex items inside them.
+이전 과제에서 `align-items` 속성을 소개하고 예시를 살펴보았습니다. 이 속성은 몇몇 트윗 임베드 요소 안에 있는 플렉스 아이템 정렬시키도록 적용될 수 있습니다.
 
 # --instructions--
 
-Add the CSS property `align-items` to the header's `.follow-btn` element. Set the value to `center`.
+헤더의 `.follow-btn` 요소에 `align-items` 속성을 추가하세요. 값을 `center`로 설정하세요.
 
 # --hints--
 
-Your `.follow-btn` should be rendered on the page. Be sure to turn off any extensions such as ad blockers.
+`.follow-btn`는 페이지에 렌더링되어야 합니다. 광고 차단기같은 확장 프로그램은 꺼야합니다.
 
 ```js
 assert($('.follow-btn').length > 0 && $('.follow-btn').css('display') !== 'none');
 ```
 
-The `.follow-btn` element should have the `align-items` property set to a value of `center`.
+`.follow-btn` 요소는 `center`로 설정된 `align-items` 속성을 가져야 합니다.
 
 ```js
 assert($('.follow-btn').css('align-items') == 'center');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-align-self-property.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-align-self-property.md
index acfa330961d..35da38cb935 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-align-self-property.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-align-self-property.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78af367417b2b2512b00
-title: Use the align-self Property
+title: align-self 속성 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/cMbvzfv'
 forumTopicId: 301107
@@ -9,23 +9,23 @@ dashedName: use-the-align-self-property
 
 # --description--
 
-The final property for flex items is `align-self`. This property allows you to adjust each item's alignment individually, instead of setting them all at once. This is useful since other common adjustment techniques using the CSS properties `float`, `clear`, and `vertical-align` do not work on flex items.
+플렉스 아이템을 위한 마지막으로 알아볼 속성은 `align-self`입니다. 이 속성은 아이템을 한번에 설정하는 대신 각각의 아이템의 정렬을 조정할 수 있게 해줍니다. `float`, `clear`, 그리고 `vertical-align`같이 다른 일반적인 설정들은 플렉스 아이템에서 동작하지 않기 때문에 이 속성이 유용합니다.
 
-`align-self` accepts the same values as `align-items` and will override any value set by the `align-items` property.
+`align-self`은 `align-items`과 같은 값을 받아들이며 `align-items` 속성으로 설정된 값을 덮어쓰기 합니다.
 
 # --instructions--
 
-Add the CSS property `align-self` to both `#box-1` and `#box-2`. Give `#box-1` a value of `center` and give `#box-2` a value of `flex-end`.
+`#box-1`와 `#box-2`에 `align-self` 속성을 추가하세요. `#box-1`에 `center` 그리고 `#box-2`에 `flex-end` 값을 주세요.
 
 # --hints--
 
-The `#box-1` element should have the `align-self` property set to a value of `center`.
+`#box-1` 요소는 `center`으로 설정된 `align-self` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-1').css('align-self') == 'center');
 ```
 
-The `#box-2` element should have the `align-self` property set to a value of `flex-end`.
+`#box-2` 요소는 `flex-end`로 설정된 `align-self` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-2').css('align-self') == 'flex-end');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-basis-property-to-set-the-initial-size-of-an-item.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-basis-property-to-set-the-initial-size-of-an-item.md
index 905c259fa47..412ec7cfcb8 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-basis-property-to-set-the-initial-size-of-an-item.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-basis-property-to-set-the-initial-size-of-an-item.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ae367417b2b2512afd
-title: Use the flex-basis Property to Set the Initial Size of an Item
+title: 아이템의 초기 크기 설정을 위한 flex-basis 속성 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/c3d9nCa'
 forumTopicId: 301108
@@ -9,35 +9,35 @@ dashedName: use-the-flex-basis-property-to-set-the-initial-size-of-an-item
 
 # --description--
 
-The `flex-basis` property specifies the initial size of the item before CSS makes adjustments with `flex-shrink` or `flex-grow`.
+`flex-basis` 속성은 CSS가 `flex-shrink` 혹은 `flex-grow`로 조정을 하기 전에 아이템의 초기 크기를 특정합니다.
 
-The units used by the `flex-basis` property are the same as other size properties (`px`, `em`, `%`, etc.). The value `auto` sizes items based on the content.
+`flex-basis` 속성은 다른 크기 속성과 같은 단위를 사용합니다(`px`, `em`, `%` 등등). `auto` 값은 내용을 기준으로 아이템의 크기를 정합니다.
 
 # --instructions--
 
-Set the initial size of the boxes using `flex-basis`. Add the CSS property `flex-basis` to both `#box-1` and `#box-2`. Give `#box-1` a value of `10em` and `#box-2` a value of `20em`.
+`flex-basis` 사용하여 상자의 초기 크기를 설정하세요. `#box-1`과 `#box-2`에 `flex-basis`를 추가하세요. `#box-1`에 `10em` 그리고 `#box-2`에 `20em` 값을 주세요.
 
 # --hints--
 
-The `#box-1` element should have the `flex-basis` property.
+`#box-1` 요소는 `flex-basis` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-1').css('flex-basis') != 'auto');
 ```
 
-The `#box-1` element should have a `flex-basis` value of `10em`.
+`#box-1` 요소는 `10em` 값을 준 `flex-basis` 속성을 가져야 합니다.
 
 ```js
 assert(code.match(/#box-1\s*?{\s*?.*?\s*?.*?\s*?flex-basis:\s*?10em;/g));
 ```
 
-The `#box-2` element should have the `flex-basis` property.
+`#box-2` 요소는 `flex-basis` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-2').css('flex-basis') != 'auto');
 ```
 
-The `#box-2` element should have a `flex-basis` value of `20em`.
+`#box-2` 요소는 `20em` 값을 준 `flex-basis` 속성을 가져야 합니다.
 
 ```js
 assert(code.match(/#box-2\s*?{\s*?.*?\s*?.*?\s*?flex-basis:\s*?20em;/g));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-column.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-column.md
index 3c4d4ed9ec7..350834b075e 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-column.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-column.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ac367417b2b2512af4
-title: Use the flex-direction Property to Make a Column
+title: 열 생성을 위한 flex-direction 속성 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/cZmWeA4'
 forumTopicId: 301109
@@ -9,15 +9,15 @@ dashedName: use-the-flex-direction-property-to-make-a-column
 
 # --description--
 
-The last two challenges used the `flex-direction` property set to `row`. This property can also create a column by vertically stacking the children of a flex container.
+이전 두 과제는 `row`로 설정된 `flex-direction` 속성을 사용했습니다. 이 속성은 플렉스 컨테이너의 자식 요소를 수직으로 쌓으며 열을 생성할 수도 있습니다.
 
 # --instructions--
 
-Add the CSS property `flex-direction` to the `#box-container` element, and give it a value of `column`.
+`#box-container` 요소에 `flex-direction` 속성을 추가하고 `column` 값을 주세요.
 
 # --hints--
 
-The `#box-container` element should have a `flex-direction` property set to `column`.
+`#box-container` 요소는 `column`로 설정된 `flex-direction` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-container').css('flex-direction') == 'column');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-row.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-row.md
index 0820808a7f6..75b06cdcae9 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-row.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-direction-property-to-make-a-row.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ab367417b2b2512af2
-title: Use the flex-direction Property to Make a Row
+title: 행 생성을 위한 flex-direction 속성 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/cBEkbfJ'
 forumTopicId: 301110
@@ -9,19 +9,19 @@ dashedName: use-the-flex-direction-property-to-make-a-row
 
 # --description--
 
-Adding `display: flex` to an element turns it into a flex container. This makes it possible to align any children of that element into rows or columns. You do this by adding the `flex-direction` property to the parent item and setting it to row or column. Creating a row will align the children horizontally, and creating a column will align the children vertically.
+요소에 `display: flex`를 추가하면 해당 요소는 플렉스 컨테이너가 됩니다. 이로써 해당 요소의 자식 요소를 행이나 열로 정렬할 수 있게 됩니다. `flex-direction` 속성을 부모 아이템에 추가하고 이 속성을 row 혹은 column으로 설정하면 됩니다. 행을 생성하면 자식 요소들을 수평으로 정렬하고 열을 생성하면 자식 요소들을 수직으로 정렬할 것입니다.
 
-Other options for `flex-direction` are `row-reverse` and `column-reverse`.
+`flex-direction`을 위한 다른 선택지는 `row-reverse`와 `column-reverse`가 있습니다.
 
-**Note:** The default value for the `flex-direction` property is `row`.
+**주의:** `flex-direction`속성의 기본값은 `row`입니다.
 
 # --instructions--
 
-Add the CSS property `flex-direction` to the `#box-container` element, and give it a value of `row-reverse`.
+`#box-container` 요소에 `flex-direction` 속성을 추가하고 `row-reverse` 값을 주세요.
 
 # --hints--
 
-The `#box-container` element should have a `flex-direction` property set to `row-reverse`.
+`#box-container` 요소는 `row-reverse`로 설정된 `flex-direction` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-container').css('flex-direction') == 'row-reverse');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-grow-property-to-expand-items.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-grow-property-to-expand-items.md
index 7a2a0999460..25d0e590249 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-grow-property-to-expand-items.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-grow-property-to-expand-items.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ae367417b2b2512afc
-title: Use the flex-grow Property to Expand Items
+title: 아이템 확장을 위한 flex-grow 속성 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/c2p78cg'
 forumTopicId: 301111
@@ -9,23 +9,23 @@ dashedName: use-the-flex-grow-property-to-expand-items
 
 # --description--
 
-The opposite of `flex-shrink` is the `flex-grow` property. Recall that `flex-shrink` controls the size of the items when the container shrinks. The `flex-grow` property controls the size of items when the parent container expands.
+`flex-shrink` 반대되는 속성은 `flex-grow` 속성입니다. `flex-shrink`가 컨테이너가 줄어들 때 아이템의 크기를 제어한다는 것을 상기하세요. `flex-grow` 속성은 부모 컨테이너가 확장될 때 아이템의 크기를 제어합니다.
 
-Using a similar example from the last challenge, if one item has a `flex-grow` value of `1` and the other has a `flex-grow` value of `3`, the one with the value of `3` will grow three times as much as the other.
+지난 과제의 비슷한 예시를 통해 하나의 아이템이 `1` 값을 준 `flex-grow` 그리고 다른 아이템이 `3`의 값을 준 `flex-grow` 속성을 가진다면 `3` 값을 가진 속성이 다른 아이템보다 세 배 더 커질 것입니다.
 
 # --instructions--
 
-Add the CSS property `flex-grow` to both `#box-1` and `#box-2`. Give `#box-1` a value of `1` and `#box-2` a value of `2`.
+`#box-1`과 `#box-2`에 `flex-grow` 속성을 추가하세요. `#box-1`에 `1` 그리고 `#box-2`에 `2` 값을 주세요.
 
 # --hints--
 
-The `#box-1` element should have the `flex-grow` property set to a value of `1`.
+`#box-1` 요소는 `1`로 설정된 `flex-grow` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-1').css('flex-grow') == '1');
 ```
 
-The `#box-2` element should have the `flex-grow` property set to a value of `2`.
+`#box-2` 요소는 `2`로 설정된 `flex-grow` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-2').css('flex-grow') == '2');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-shorthand-property.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-shorthand-property.md
index 69cbf5e74cf..f01e7e126be 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-shorthand-property.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-shorthand-property.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ae367417b2b2512afe
-title: Use the flex Shorthand Property
+title: flex 단축 속성 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/cbpW2tE'
 forumTopicId: 301112
@@ -9,21 +9,21 @@ dashedName: use-the-flex-shorthand-property
 
 # --description--
 
-There is a shortcut available to set several flex properties at once. The `flex-grow`, `flex-shrink`, and `flex-basis` properties can all be set together by using the `flex` property.
+여러 플렉스 속성을 한번에 사용할 수 있는 방법이 있습니다. `flex-grow`, `flex-shrink` 그리고 `flex-basis` 속성은 모두 `flex` 속성을 이용하여 함께 설정할 수 있습니다.
 
-For example, `flex: 1 0 10px;` will set the item to `flex-grow: 1;`, `flex-shrink: 0;`, and `flex-basis: 10px;`.
+예를 들어 `flex: 1 0 10px;`는 아이템을 `flex-grow: 1;`, `flex-shrink: 0;` 그리고 `flex-basis: 10px;`로 설정하게 됩니다.
 
-The default property settings are `flex: 0 1 auto;`.
+디폴트 설정은 `flex: 0 1 auto;`입니다.
 
 # --instructions--
 
-Add the CSS property `flex` to both `#box-1` and `#box-2`. Give `#box-1` the values so its `flex-grow` is `2`, its `flex-shrink` is `2`, and its `flex-basis` is `150px`. Give `#box-2` the values so its `flex-grow` is `1`, its `flex-shrink` is `1`, and its `flex-basis` is `150px`.
+`#box-1`과 `#box-2`에 `flex` 속성을 추가하세요. `#box-1`에 `flex-grow`는 `2`, `flex-shrink`는 `2` 그리고 `flex-basis`는 `150px`가 되도록 값을 주세요. `#box-2`에 `flex-grow`는 `1`, `flex-shrink`는 `1` 그리고 `flex-basis`는 `150px`가 되도록 값을 주세요.
 
-These values will cause `#box-1` to grow to fill the extra space at twice the rate of `#box-2` when the container is greater than 300px and shrink at twice the rate of `#box-2` when the container is less than 300px. 300px is the combined size of the `flex-basis` values of the two boxes.
+이 값들은 컨테이너가 300px보다 클 때 `#box-1`가 `#box-2`보다 여분의 공간을 두배로 차지하도록 만들고 컨테이너가 300px보다 작을 때 `#box-2`보다 여분 공간의 반절을 차지하게 만듭니다. 300px는 두 상자의 `flex-basis` 값의 합친 크기입니다.
 
 # --hints--
 
-The `#box-1` element should have the `flex` property set to a value of `2 2 150px`.
+`#box-1` 요소는 `2 2 150px`로 설정된 `flex` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -33,7 +33,7 @@ assert(
 );
 ```
 
-The `#box-2` element should have the `flex` property set to a value of `1 1 150px`.
+`#box-2` 요소는 `1 1 150px`로 설정된 `flex` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -43,7 +43,7 @@ assert(
 );
 ```
 
-Your code should use the `flex` property for `#box-1` and `#box-2`.
+`#box-1`과 `#box-2`에 `flex` 속성을 사용해야 합니다.
 
 ```js
 assert(code.match(/flex:\s*?\d\s+?\d\s+?150px;/g).length == 2);
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-shrink-property-to-shrink-items.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-shrink-property-to-shrink-items.md
index fc9b59ab23f..429420518a5 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-shrink-property-to-shrink-items.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-shrink-property-to-shrink-items.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ad367417b2b2512afb
-title: Use the flex-shrink Property to Shrink Items
+title: 아이템을 줄이기 위한 flex-shrink 속성 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/cd3PBfr'
 forumTopicId: 301113
@@ -9,25 +9,25 @@ dashedName: use-the-flex-shrink-property-to-shrink-items
 
 # --description--
 
-So far, all the properties in the challenges apply to the flex container (the parent of the flex items). However, there are several useful properties for the flex items.
+지금까지 과제에 있었던 모든 속성은 플렉스 컨테이너(플렉스 아이템의 부모 요소) 에 적용됩니다. 그러나 플렉스 아이템에 사용할 수 있는 여러 유용한 속성이 있습니다.
 
-The first is the `flex-shrink` property. When it's used, it allows an item to shrink if the flex container is too small. Items shrink when the width of the parent container is smaller than the combined widths of all the flex items within it.
+첫번째는 `flex-shrink` 속성입니다. 이 속성을 사용하면 플렉스 컨테이너가 너무 작을 때 아이템을 줄일 수 있습니다. 부모 컨테이너의 너비가 그 컨테이너 안의 모든 플렉스 아이템의 너비를 합친 값보다 작을 때 아이템이 줄어듭니다.
 
-The `flex-shrink` property takes numbers as values. The higher the number, the more it will shrink compared to the other items in the container. For example, if one item has a `flex-shrink` value of `1` and the other has a `flex-shrink` value of `3`, the one with the value of `3` will shrink three times as much as the other.
+`flex-shrink` 속성은 값으로 숫자를 취합니다. 숫자가 클수록 컨테이너 내의 다른 아이템과 비교하여 더 많이 줄어들 것입니다. 예를 들면 한 아이템의 `flex-shrink` 값이 `1`이고 다른 아이템의 `flex-shrink` 값이 `3`이라면 `3`을 가진 아이템이 다른 아이템보다 3배 더 줄어들 것입니다.
 
 # --instructions--
 
-Add the CSS property `flex-shrink` to both `#box-1` and `#box-2`. Give `#box-1` a value of `1` and `#box-2` a value of `2`.
+`#box-1`와 `#box-2`에 `flex-shrink` 속성을 추가하세요. `#box-1`에 `1`의 값을 주고 `#box-2`에 `2`의 값을 주세요.
 
 # --hints--
 
-The `#box-1` element should have the `flex-shrink` property set to a value of `1`.
+`#box-1` 요소는 `1`로 설정된 `flex-shrink` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-1').css('flex-shrink') == '1');
 ```
 
-The `#box-2` element should have the `flex-shrink` property set to a value of `2`.
+`#box-2` 요소는 `2`로 설정된 `flex-shrink` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-2').css('flex-shrink') == '2');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-wrap-property-to-wrap-a-row-or-column.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-wrap-property-to-wrap-a-row-or-column.md
index cc027815f1a..0659c28f5f9 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-wrap-property-to-wrap-a-row-or-column.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-flex-wrap-property-to-wrap-a-row-or-column.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ad367417b2b2512afa
-title: Use the flex-wrap Property to Wrap a Row or Column
+title: 행 혹은 열을 감싸기 위해 flex-wrap 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/cQv9ZtG'
 forumTopicId: 301114
@@ -9,21 +9,21 @@ dashedName: use-the-flex-wrap-property-to-wrap-a-row-or-column
 
 # --description--
 
-CSS flexbox has a feature to split a flex container into multiple rows (or columns). By default, a flex container will fit all flex items together. For example, a row will all be on one line.
+CSS flexbox는 플렉스 컨테이너를 여러 행(혹은 열)로 나누는 기능을 갖고 있습니다. 기본값으로로 플렉스 컨테이너는 모든 플렉스 아이템에 맞추게 됩니다. 예를 들면 행은 한 라인 위에 있게 될 것입니다.
 
-However, using the `flex-wrap` property tells CSS to wrap items. This means extra items move into a new row or column. The break point of where the wrapping happens depends on the size of the items and the size of the container.
+하지만 `flex-wrap` 속성을 사용하여 아이템을 래핑할 수 있습니다. 이는 여분의 아이템이 다음 행 혹은 열로 이동한다는 것을 의미합니다. 래핑이 일어나는 시작점은 아이템의 크기와 컨테이너의 크기에 따라 다릅니다.
 
-CSS also has options for the direction of the wrap:
+CSS는 래핑의 방향을 위한 선택지도 있습니다.
 
-<ul><li><code>nowrap</code>: this is the default setting, and does not wrap items.</li><li><code>wrap</code>: wraps items onto multiple lines from top-to-bottom if they are in rows and left-to-right if they are in columns.</li><li><code>wrap-reverse</code>: wraps items onto multiple lines from bottom-to-top if they are in rows and right-to-left if they are in columns.</li></ul>
+<ul><li><code>nowrap</code>: 기본 설정이며 아이템을 래핑하지 않습니다.</li><li><code>wrap</code>: 아이템을 행에 있을 때는 위아래로 그리고 열에 있을 때는 좌우 방향의 여러 라인으로 래핑합니다.</li><li><code>wrap-reverse</code>: 아이템을 행에 있을 때는 아래에서 위로 그리고 열에 있을 때는 우측에서 좌측 방향의 여러 라인으로 아이템을 래핑 합니다.</li></ul>
 
 # --instructions--
 
-The current layout has too many boxes for one row. Add the CSS property `flex-wrap` to the `#box-container` element, and give it a value of `wrap`.
+현재 레이아웃은 한 행에 너무 많은 박스가 있습니다. `#box-container` 요소에 `flex-wrap` 속성을 주고 `wrap` 값으로 설정하세요.
 
 # --hints--
 
-The `#box-container` element should have the `flex-wrap` property set to a value of `wrap`.
+`#box-container` 요소는 `wrap`로 설정된 `flex-wrap` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-container').css('flex-wrap') == 'wrap');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-justify-content-property-in-the-tweet-embed.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-justify-content-property-in-the-tweet-embed.md
index 367ec16ba62..9da97c919f5 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-justify-content-property-in-the-tweet-embed.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-justify-content-property-in-the-tweet-embed.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ac367417b2b2512af7
-title: Use the justify-content Property in the Tweet Embed
+title: 트윗 임베드에 justify-content 속성 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/c43GgTa'
 forumTopicId: 301115
@@ -9,21 +9,21 @@ dashedName: use-the-justify-content-property-in-the-tweet-embed
 
 # --description--
 
-The last challenge showed an example of the `justify-content` property. For the tweet embed, this property can be applied to align the items in the `.profile-name` element.
+지난 과제에서 `justify-content` 속성의 예시를 보았습니다. 트윗 임베드에 대해 이 속성은 `.profile-name` 요소에 있는 아이템을 정렬하기 위해 적용됩니다.
 
 # --instructions--
 
-Add the CSS property `justify-content` to the header's `.profile-name` element and set the value to any of the options from the last challenge.
+헤더의 `.profile-name` 요소에 `justify-content` 속성을 추가하고 지난 과제에서 본 선택지 중 하나로 속성 값을 설정하세요.
 
 # --hints--
 
-Your `.follow-btn` should be rendered on the page. Be sure to turn off any extensions such as ad blockers.
+`.follow-btn`가 페이지에 렌더링되어야 합니다. 광고 차단기 같은 확장 프로그램은 꺼야 합니다.
 
 ```js
 assert($('.follow-btn').length > 0 && $('.follow-btn').css('display') !== 'none');
 ```
 
-The `.profile-name` element should have the `justify-content` property set to any of these values: `center`, `flex-start`, `flex-end`, `space-between`, `space-around`, or `space-evenly`.
+`.profile-name` 요소는 `center`, `flex-start`, `flex-end`, `space-between`, `space-around` 혹은 `space-evenly` 중 하나로 값이 설정된 `justify-content` 속성을 가져야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-order-property-to-rearrange-items.md b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-order-property-to-rearrange-items.md
index 600e75391c2..8c77e762def 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-order-property-to-rearrange-items.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-flexbox/use-the-order-property-to-rearrange-items.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78ae367417b2b2512aff
-title: Use the order Property to Rearrange Items
+title: 아이템 재배치를 위한 order 속성 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pVaDAv/cMbvNAG'
 forumTopicId: 301116
@@ -9,21 +9,21 @@ dashedName: use-the-order-property-to-rearrange-items
 
 # --description--
 
-The `order` property is used to tell CSS the order of how flex items appear in the flex container. By default, items will appear in the same order they come in the source HTML. The property takes numbers as values, and negative numbers can be used.
+`order` 속성은 플렉스 컨테이너에 플렉스 아이템이 어떻게 보여질지에 대한 순서를 정하기 위해 사용됩니다. 기본 설정으로 아이템은 소스 HTML에 나타난 순서대로 보여질 것입니다. 이 속성은 음수를 포함한 숫자를 값으로 취합니다.
 
 # --instructions--
 
-Add the CSS property `order` to both `#box-1` and `#box-2`. Give `#box-1` a value of `2` and give `#box-2` a value of `1`.
+`#box-1`과 `#box-2`에 `order` 속성을 추가하세요. `#box-1`에 `2`의 값을 주고 `#box-2`에 `1`의 값을 주세요.
 
 # --hints--
 
-The `#box-1` element should have the `order` property set to a value of `2`.
+`#box-1` 요소는 `2`로 설정된 `order` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-1').css('order') == '2');
 ```
 
-The `#box-2` element should have the `order` property set to a value of `1`.
+`#box-2` 요소는 `1`로 설정된 `order` 속성을 가져야 합니다.
 
 ```js
 assert($('#box-2').css('order') == '1');
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/add-columns-with-grid-template-columns.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/add-columns-with-grid-template-columns.md
index 8f28136c02b..5a3496ecd30 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/add-columns-with-grid-template-columns.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/add-columns-with-grid-template-columns.md
@@ -1,6 +1,6 @@
 ---
 id: 5a9036d038fddaf9a66b5d32
-title: Add Columns with grid-template-columns
+title: grid-template-columns으로 열 추가하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/c7NzDHv'
 forumTopicId: 301117
@@ -9,7 +9,7 @@ dashedName: add-columns-with-grid-template-columns
 
 # --description--
 
-Simply creating a grid element doesn't get you very far. You need to define the structure of the grid as well. To add some columns to the grid, use the `grid-template-columns` property on a grid container as demonstrated below:
+하나의 그리드 요소만 생성한다고 해서 다 된 것은 아닙니다. 그리드의 구조도 정의해야 합니다. 그리드에 열을 추가하려면 아래 보이는 것처럼 그리드 컨테이너에 `grid-template-columns` 속성을 사용해야 합니다.
 
 ```css
 .container {
@@ -18,15 +18,15 @@ Simply creating a grid element doesn't get you very far. You need to define the
 }
 ```
 
-This will give your grid two columns that are each 50px wide. The number of parameters given to the `grid-template-columns` property indicates the number of columns in the grid, and the value of each parameter indicates the width of each column.
+이렇게 하면 그리드의 두 열에 각각 50px을 주게 됩니다. `grid-template-columns` 속성에 주어진 인자의 수는 그리드에서 열의 수를 나타내고 각 인자의 값은 각 열의 너비를 나타냅니다.
 
 # --instructions--
 
-Give the grid container three columns that are each `100px` wide.
+그리드 컨테이너에 너비가 `100px`인 세 개의 열을 적용하세요.
 
 # --hints--
 
-`container` class should have a `grid-template-columns` property with three units of `100px`.
+`container` 클래스는 세 개의 `100px`을 가지는 `grid-template-columns` 속성을 가져야 합니다.
 
 ```js
 assert(new __helpers.CSSHelp(document).getStyle('.container')?.gridTemplateColumns === '100px 100px 100px');
@@ -51,7 +51,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.container')?.gridTemplateColum
     display: grid;
     /* Only change code below this line */
 
-    
+
     /* Only change code above this line */
   }
 </style>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/add-gaps-faster-with-grid-gap.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/add-gaps-faster-with-grid-gap.md
index 4a96f7fd573..842d078a767 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/add-gaps-faster-with-grid-gap.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/add-gaps-faster-with-grid-gap.md
@@ -1,6 +1,6 @@
 ---
 id: 5a9036ee38fddaf9a66b5d37
-title: Add Gaps Faster with grid-gap
+title: grid-gap으로 간격 빠르게 추가하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/ca2qVtv'
 forumTopicId: 301118
@@ -9,15 +9,15 @@ dashedName: add-gaps-faster-with-grid-gap
 
 # --description--
 
-`grid-gap` is a shorthand property for `grid-row-gap` and `grid-column-gap` from the previous two challenges that's more convenient to use. If `grid-gap` has one value, it will create a gap between all rows and columns. However, if there are two values, it will use the first one to set the gap between the rows and the second value for the columns.
+`grid-gap`은 이전 과제에서 살펴본 `grid-row-gap`과 `grid-column-gap`의 축약 속성이며 사용하기 더 용이합니다. `grid-gap`이 하나의 값을 가진다면 모든 행열 사이에 하나의 간격을 생성하게 될 것입니다. 그러나 값이 두 개라면 첫번째 값은 행, 두번째 값은 열에 적용될 것입니다.
 
 # --instructions--
 
-Use `grid-gap` to introduce a `10px` gap between the rows and `20px` gap between the columns.
+행에 `10px`, 열에 `20px` 간격을 주도록 `grid-gap`을 사용하세요.
 
 # --hints--
 
-`container` class should have a `grid-gap` property that introduces a `10px` gap between the rows and a `20px` gap between the columns.
+`container` 클래스는 행에 `10px`, 열에 `20px` 간격을 주는 `grid-gap` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -49,7 +49,7 @@ assert(
     grid-template-rows: 1fr 1fr 1fr;
     /* Only change code below this line */
 
-    
+
     /* Only change code above this line */
   }
 </style>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/add-rows-with-grid-template-rows.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/add-rows-with-grid-template-rows.md
index 80cc7894d34..740f9844179 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/add-rows-with-grid-template-rows.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/add-rows-with-grid-template-rows.md
@@ -1,6 +1,6 @@
 ---
 id: 5a9036e138fddaf9a66b5d33
-title: Add Rows with grid-template-rows
+title: grid-template-rows로 행 추가하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cbp9Pua'
 forumTopicId: 301119
@@ -9,15 +9,15 @@ dashedName: add-rows-with-grid-template-rows
 
 # --description--
 
-The grid you created in the last challenge will set the number of rows automatically. To adjust the rows manually, use the `grid-template-rows` property in the same way you used `grid-template-columns` in the previous challenge.
+이전 과제에서 생성한 그리드는 자동으로 행의 수를 설정하게 됩니다. 행을 수동으로 조정하려면 이전 과제에서 `grid-template-columns`를 사용한 것처럼 `grid-template-rows` 속성을 사용하면 됩니다.
 
 # --instructions--
 
-Add two rows to the grid that are `50px` tall each.
+높이가 `50px`인 두개의 행을 그리드에 추가하세요.
 
 # --hints--
 
-`container` class should have a `grid-template-rows` property with two units of `50px`.
+`container` 클래스는 두 개의 `50px`을 가진 `grid-template-rows` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -47,7 +47,7 @@ assert(
     grid-template-columns: 100px 100px 100px;
     /* Only change code below this line */
 
-    
+
     /* Only change code above this line */
   }
 </style>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-all-items-horizontally-using-justify-items.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-all-items-horizontally-using-justify-items.md
index eaecfedfb80..7b5c949b656 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-all-items-horizontally-using-justify-items.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-all-items-horizontally-using-justify-items.md
@@ -1,6 +1,6 @@
 ---
 id: 5a90376038fddaf9a66b5d3c
-title: Align All Items Horizontally using justify-items
+title: justify-items로 모든 아이템 수평 정렬하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cJbpECn'
 forumTopicId: 301120
@@ -9,15 +9,15 @@ dashedName: align-all-items-horizontally-using-justify-items
 
 # --description--
 
-Sometimes you want all the items in your CSS Grid to share the same alignment. You can use the previously learned properties and align them individually, or you can align them all at once horizontally by using `justify-items` on your grid container. This property can accept all the same values you learned about in the previous two challenges, the difference being that it will move **all** the items in our grid to the desired alignment.
+CSS 그리드에 동일하게 정렬하고 싶을 때가 있습니다. 이전에 배운 속성들을 사용하여 개별적으로 정렬하거나 그리드 컨테이너에 `justify-items`을 사용하여 한 번에 수평 정렬을 시킬 수 있습니다. 이 속성은 이전 두 과제에서 배운 모두 같은 값을 받을 수 있습니다. grid에 있는 **모든** 아이템을 원하는 정렬로 옮겨주는 게 차이가 있습니다.
 
 # --instructions--
 
-Use this property to center all our items horizontally.
+모든 아이템을 수평적으로 중심에 맞추도록 이 속성을 사용하세요.
 
 # --hints--
 
-`container` class should have a `justify-items` property that has the value of `center`.
+`container` 클래스 `center`의 값을 가진 `justify-items` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -50,7 +50,7 @@ assert(
     grid-gap: 10px;
     /* Only change code below this line */
 
-    
+
     /* Only change code above this line */
   }
 </style>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-all-items-vertically-using-align-items.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-all-items-vertically-using-align-items.md
index 9299195765d..4eedc637b71 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-all-items-vertically-using-align-items.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-all-items-vertically-using-align-items.md
@@ -1,6 +1,6 @@
 ---
 id: 5a94fdf869fb03452672e45b
-title: Align All Items Vertically using align-items
+title: align-items로 아이템 수직 정렬하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/ckzPeUv'
 forumTopicId: 301121
@@ -9,15 +9,15 @@ dashedName: align-all-items-vertically-using-align-items
 
 # --description--
 
-Using the `align-items` property on a grid container will set the vertical alignment for all the items in our grid.
+그리드 컨테이너에 `align-items` 속성을 사용하면 그리드에 있는 모든 아이템을 수직 정렬시킬 수 있습니다.
 
 # --instructions--
 
-Use it now to move all the items to the end of each cell.
+각 셀의 끝에 모든 아이템을 이동시키도록 이 속성을 사용하세요.
 
 # --hints--
 
-`container` class should have a `align-items` property that has the value of `end`.
+`container` 클래스는 `end` 값을 가진 `align-items` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -48,7 +48,7 @@ assert(
     grid-gap: 10px;
     /* Only change code below this line */
 
-    
+
     /* Only change code above this line */
   }
 </style>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-an-item-horizontally-using-justify-self.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-an-item-horizontally-using-justify-self.md
index dd069b37ffc..959e4532636 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-an-item-horizontally-using-justify-self.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-an-item-horizontally-using-justify-self.md
@@ -1,6 +1,6 @@
 ---
 id: 5a90374338fddaf9a66b5d3a
-title: Align an Item Horizontally using justify-self
+title: justify-self로 하나의 아이템 수평 정렬하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cJbpKHq'
 forumTopicId: 301122
@@ -9,21 +9,21 @@ dashedName: align-an-item-horizontally-using-justify-self
 
 # --description--
 
-In CSS Grid, the content of each item is located in a box which is referred to as a <dfn>cell</dfn>. You can align the content's position within its cell horizontally using the `justify-self` property on a grid item. By default, this property has a value of `stretch`, which will make the content fill the whole width of the cell. This CSS Grid property accepts other values as well:
+CSS 그리드에서는 각 아이템의 내용은 <dfn>셀</dfn>이라고 부르는 상자 안에 위치합니다. 한 그리드 아이템에 `justify-self` 속성을 사용하여 셀 내의 내용의 위치를 수평 정렬할 수 있습니다. 기본값으로 이 속성은 내용이 셀 전체를 차지하도록 만드는 `stretch` 값을 가집니다. 이 CSS 그리드 속성은 다른 값들도 받습니다.
 
-`start`: aligns the content at the left of the cell,
+`start`: 셀의 좌측에 내용을 정렬
 
-`center`: aligns the content in the center of the cell,
+`center`: 셀의 중앙에 내용을 정렬
 
-`end`: aligns the content at the right of the cell.
+`end`: 셀의 우측에 내용을 정렬
 
 # --instructions--
 
-Use the `justify-self` property to center the item with the class `item2`.
+`item2` 클래스를 가진 아이템을 중앙에 위치시키도록 `justify-self` 속성을 사용하세요.
 
 # --hints--
 
-`item2` class should have a `justify-self` property that has the value of `center`.
+`item2` 클래스는 `center` 값을 가진 `justify-self` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -43,7 +43,7 @@ assert(
     background: LightSalmon;
     /* Only change code below this line */
 
-    
+
     /* Only change code above this line */
   }
 
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-an-item-vertically-using-align-self.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-an-item-vertically-using-align-self.md
index 82c8018e92e..7181b762f59 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-an-item-vertically-using-align-self.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/align-an-item-vertically-using-align-self.md
@@ -1,6 +1,6 @@
 ---
 id: 5a90375238fddaf9a66b5d3b
-title: Align an Item Vertically using align-self
+title: align-self로 하나의 아이템 수직 정렬하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cmzd4fz'
 forumTopicId: 301123
@@ -9,15 +9,15 @@ dashedName: align-an-item-vertically-using-align-self
 
 # --description--
 
-Just as you can align an item horizontally, there's a way to align an item vertically as well. To do this, you use the `align-self` property on an item. This property accepts all of the same values as `justify-self` from the last challenge.
+아이템을 수평 정렬할 수 있는 것처럼 수직 정렬할 수 있는 방법도 있습니다. 이를 위해 한 개의 아이템에 `align-self` 속성을 사용하면 됩니다. 이 속성은 이전 과제에서 살펴본 `justify-self`와 같은 값들을 받습니다.
 
 # --instructions--
 
-Align the item with the class `item3` vertically at the `end`.
+`item3` 클래스를 가진 아이템을 `end`에 정렬하세요.
 
 # --hints--
 
-`item3` class should have a `align-self` property that has the value of `end`.
+`item3` 클래스는 `end` 값을 가진 `align-self` 속성을 가져야 합니다.
 
 ```js
 assert(code.match(/.item3\s*?{[\s\S]*align-self\s*?:\s*?end\s*?;[\s\S]*}/gi));
@@ -36,7 +36,7 @@ assert(code.match(/.item3\s*?{[\s\S]*align-self\s*?:\s*?end\s*?;[\s\S]*}/gi));
     background: PaleTurquoise;
     /* Only change code below this line */
 
-    
+
     /* Only change code above this line */
   }
 
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-a-column-gap-using-grid-column-gap.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-a-column-gap-using-grid-column-gap.md
index 1e10343ff95..83bc352166c 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-a-column-gap-using-grid-column-gap.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-a-column-gap-using-grid-column-gap.md
@@ -1,6 +1,6 @@
 ---
 id: 5a9036ee38fddaf9a66b5d35
-title: Create a Column Gap Using grid-column-gap
+title: grid-column-gap으로 열 간격 생성하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cVZ8vfD'
 forumTopicId: 301124
@@ -9,21 +9,21 @@ dashedName: create-a-column-gap-using-grid-column-gap
 
 # --description--
 
-So far in the grids you have created, the columns have all been tight up against each other. Sometimes you want a gap in between the columns. To add a gap between the columns, use the `grid-column-gap` property like this:
+지금까지 생성해 온 그리드는 열의 간격이 넓지 않았습니다. 열 사이에 간격을 줘야할 때가 있습니다. 열 사이에 간격을 주려면 아래와 같이 `grid-column-gap` 속성을 사용하면 됩니다.
 
 ```css
 grid-column-gap: 10px;
 ```
 
-This creates 10px of empty space between all of our columns.
+이는 모든 열 사이에 10px 간격의 공백을 생성합니다.
 
 # --instructions--
 
-Give the columns in the grid a `20px` gap.
+그리드의 열 사이에 `20px` 간격을 주세요.
 
 # --hints--
 
-`container` class should have a `grid-column-gap` property that has the value of `20px`.
+`container` 클래스는 `20px`의 갑을 가지는 `grid-column-gap` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -55,7 +55,7 @@ assert(
     grid-template-rows: 1fr 1fr 1fr;
     /* Only change code below this line */
 
-   
+
     /* Only change code above this line */
   }
 </style>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-a-row-gap-using-grid-row-gap.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-a-row-gap-using-grid-row-gap.md
index 5244c13abd0..e80c6a8269a 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-a-row-gap-using-grid-row-gap.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-a-row-gap-using-grid-row-gap.md
@@ -1,6 +1,6 @@
 ---
 id: 5a9036ee38fddaf9a66b5d36
-title: Create a Row Gap using grid-row-gap
+title: grid-row-gap으로 행 간격 생성하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cPbJ2Cv'
 forumTopicId: 301125
@@ -9,15 +9,15 @@ dashedName: create-a-row-gap-using-grid-row-gap
 
 # --description--
 
-You can add a gap in between the rows of a grid using `grid-row-gap` in the same way that you added a gap in between columns in the previous challenge.
+이전 과제에서 열 사이에 간격을 주었던 것처럼 `grid-row-gap`를 사용하여 그리드의 행 사이에 간격을 줄 수 있습니다.
 
 # --instructions--
 
-Create a gap for the rows that is `5px` tall.
+행 사이에 `5px` 높이의 간격을 생성하세요.
 
 # --hints--
 
-`container` class should have a `grid-row-gap` property that has the value of `5px`.
+`container` 클래스는 `5px`의 값을 가진 `grid-row-gap` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -47,7 +47,7 @@ assert(
     grid-template-rows: 1fr 1fr 1fr;
     /* Only change code below this line */
 
-    
+
     /* Only change code above this line */
   }
 </style>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fill.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fill.md
index cadf60f6461..8126ba5ba00 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fill.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fill.md
@@ -1,6 +1,6 @@
 ---
 id: 5a94fe5469fb03452672e461
-title: Create Flexible Layouts Using auto-fill
+title: auto-fill로 유동적인 레이아웃 생성하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cmzdycW'
 forumTopicId: 301126
@@ -9,21 +9,21 @@ dashedName: create-flexible-layouts-using-auto-fill
 
 # --description--
 
-The repeat function comes with an option called <dfn>auto-fill</dfn>. This allows you to automatically insert as many rows or columns of your desired size as possible depending on the size of the container. You can create flexible layouts when combining `auto-fill` with `minmax`, like this:
+repeat 함수는 <dfn>auto-fill</dfn>이라는 옵션과 함께 사용됩니다. 이는 컨테이너의 크기에 따라 가능한 범위 내에서 원하는 크기의 행 혹은 열을 자동으로 삽입할 수 있게 해줍니다. 다음과 같이 `auto-fill`과 `minmax`을 조합하면 유연한 레이아웃을 생성할 수 있습니다.
 
 ```css
 repeat(auto-fill, minmax(60px, 1fr));
 ```
 
-When the container changes size, this setup keeps inserting 60px columns and stretching them until it can insert another one. **Note:** If your container can't fit all your items on one row, it will move them down to a new one.
+컨테이너의 크기가 변할 때 이 설정은 60px의 열을 계속 삽입하고 다른 하나를 삽입할 때까지 열을 계속 늘립니다. **주의:** 컨테이너가 한 행안에 아이템을 모두 담을 수 없다면 아이템은 새로운 행에 위치하게 됩니다.
 
 # --instructions--
 
-In the first grid, use `auto-fill` with `repeat` to fill the grid with columns that have a minimum width of `60px` and maximum of `1fr`. Then resize the preview to see auto-fill in action.
+첫번째 그리드에서 최소 너비 `60px`과 최대 너비 `1fr`을 가진 열로 그리드를 채우도록 `repeat`과 `auto-fill`을 사용하세요. 그런 다음에 auto-fill의 효과를 확인하기 위해 미리보기의 크기를 조정하세요.
 
 # --hints--
 
-`container` class should have a `grid-template-columns` property with `repeat` and `auto-fill` that will fill the grid with columns that have a minimum width of `60px` and maximum of `1fr`.
+`container` 클래스는 최소 `60px`와 최대 `1fr` 너비를 가진 열로 grid를 채우는 `repeat`와 `auto-fill`을 가진 `grid-template-columns` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -96,7 +96,7 @@ assert(
   .item3{background:PaleTurquoise;}
   .item4{background:LightPink;}
   .item5{background:PaleGreen;}
-  
+
   .container {
     font-size: 40px;
     min-height: 100px;
@@ -104,14 +104,14 @@ assert(
     background: LightGray;
     display: grid;
     /* Only change code below this line */
-    
+
     grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
-    
+
     /* Only change code above this line */
     grid-template-rows: 1fr 1fr 1fr;
     grid-gap: 10px;
   }
-  
+
   .container2 {
     font-size: 40px;
     min-height: 100px;
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fit.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fit.md
index 89449f45de3..9c4f64090ed 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fit.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-flexible-layouts-using-auto-fit.md
@@ -1,6 +1,6 @@
 ---
 id: 5a94fe6269fb03452672e462
-title: Create Flexible Layouts Using auto-fit
+title: auto-fit으로 유연한 레이아웃 생성하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/c3dPph8'
 forumTopicId: 301127
@@ -9,17 +9,17 @@ dashedName: create-flexible-layouts-using-auto-fit
 
 # --description--
 
-`auto-fit` works almost identically to `auto-fill`. The only difference is that when the container's size exceeds the size of all the items combined, `auto-fill` keeps inserting empty rows or columns and pushes your items to the side, while `auto-fit` collapses those empty rows or columns and stretches your items to fit the size of the container.
+`auto-fit`은 `auto-fill`과 거의 비슷하게 동작합니다. 유일한 차이점은 컨테이너 크기가 모든 아이템을 합쳤을 때보다 클 때 `auto-fill`은 계속 빈 행혹은 열을 추가하여 아이템을 옆으로 밀어 넣는 반면에 `auto-fit`은 그 빈 행과 열을 축소시켜 아이템들을 컨테이너 크기에 맞게 늘립니다.
 
-**Note:** If your container can't fit all your items on one row, it will move them down to a new one.
+**주의:** 컨테이너가 한 행에 모든 아이템을 담을 수 없다면 아이템은 다음 행에 위치하게 됩니다.
 
 # --instructions--
 
-In the second grid, use `auto-fit` with `repeat` to fill the grid with columns that have a minimum width of `60px` and maximum of `1fr`. Then resize the preview to see the difference.
+두번째 그리드에서 최소 `60px`과 최대 `1fr` 너비를 가진 열로 그리드를 채우도록 `repeat`와 `auto-fit`을 사용하세요. 그런 다음에 차이를 확인하기 위해 미리보기의 크기를 조정하세요.
 
 # --hints--
 
-`container2` class should have a `grid-template-columns` property with `repeat` and `auto-fit` that will fill the grid with columns that have a minimum width of `60px` and a maximum of `1fr`.
+`container2` 클래스는 최소 `60px`과 최대 `1fr` 너비를 가진 열로 grid를 채우는 `repeat`와 `auto-fit`을 가진 `grid-template-columns` 속성을 가져야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-grids-within-grids.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-grids-within-grids.md
index a980e76eaed..778b265c09e 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-grids-within-grids.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-grids-within-grids.md
@@ -1,6 +1,6 @@
 ---
 id: 5a94fe8569fb03452672e464
-title: Create Grids within Grids
+title: 그리드 안에 그리드 생성하기
 challengeType: 0
 forumTopicId: 301128
 dashedName: create-grids-within-grids
@@ -8,17 +8,17 @@ dashedName: create-grids-within-grids
 
 # --description--
 
-Turning an element into a grid only affects the behavior of its direct descendants. So by turning a direct descendant into a grid, you have a grid within a grid.
+한 요소를 그리드로 바꾸는 것은 오직 직계 하위 요소들의 행동에만 영향을 미칩니다. 그래서 직계 하위 요소를 그리드로 바꾸면 그리드 안에 그리드를 가지게 됩니다.
 
-For example, by setting the `display` and `grid-template-columns` properties of the element with the `item3` class, you create a grid within your grid.
+예를 들면 `item3` 클래스를 가진 요소의 `display` and `grid-template-columns` 속성들을 설정하여 그리드 안에 그리드를 생성할 수 있습니다.
 
 # --instructions--
 
-Turn the element with the `item3` class into a grid with two columns with a width of `auto` and `1fr` using `display` and `grid-template-columns`.
+`display` and `grid-template-columns`사용하여 `item3` 클래스를 가진 요소를 `auto`와 `1fr` 너비를 가진 두 열로 된 그리드로 변환하세요.
 
 # --hints--
 
-`item3` class should have a `grid-template-columns` property with `auto` and `1fr` as values.
+`item3` 클래스는 `auto`와 `1fr` 값을 가진 `grid-template-columns` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -28,7 +28,7 @@ assert(
 );
 ```
 
-`item3` class should have a `display` property with the value of `grid`.
+`item3` 클래스는 `grid` 값을 가진 `display` 속성을 가져야 합니다.
 
 ```js
 assert(code.match(/.item3\s*?{[\s\S]*display\s*?:\s*?grid\s*?;[\s\S]*}/gi));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-your-first-css-grid.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-your-first-css-grid.md
index 3d7f7e2d3a6..689d2ae2e39 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-your-first-css-grid.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/create-your-first-css-grid.md
@@ -1,6 +1,6 @@
 ---
 id: 5a858944d96184f06fd60d61
-title: Create Your First CSS Grid
+title: 첫 CSS 그리드 생성하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cqwREC4'
 forumTopicId: 301129
@@ -9,17 +9,17 @@ dashedName: create-your-first-css-grid
 
 # --description--
 
-Turn any HTML element into a grid container by setting its `display` property to `grid`. This gives you the ability to use all the other properties associated with CSS Grid.
+`display` 속성을 `grid`로 설정하여 HTML 요소를 그리드 컨테이너로 변환하세요. 이는 CSS 그리드에 관련된 모든 속성을 사용할 수 있게 해줍니다.
 
-**Note:** In CSS Grid, the parent element is referred to as the <dfn>container</dfn> and its children are called <dfn>items</dfn>.
+**주의:** CSS 그리드에서 부모 요소는 <dfn>컨테이너</dfn>라 하고 그 자식 요소는 <dfn>아이템</dfn>이라고 합니다.
 
 # --instructions--
 
-Change the display of the div with the `container` class to `grid`.
+`container` 클래스를 가진 div의 display를 `grid`로 바꾸세요.
 
 # --hints--
 
-`container` class should have a `display` property with a value of `grid`.
+`container` 클래스는 `grid` 값을 가지는 `display` 속성을 가져야 합니다.
 
 ```js
 assert(code.match(/.container\s*?{[\s\S]*display\s*?:\s*?grid\s*?;[\s\S]*}/gi));
@@ -43,7 +43,7 @@ assert(code.match(/.container\s*?{[\s\S]*display\s*?:\s*?grid\s*?;[\s\S]*}/gi));
     background: LightGray;
     /* Only change code below this line */
 
-    
+
     /* Only change code above this line */
   }
 </style>
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/divide-the-grid-into-an-area-template.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/divide-the-grid-into-an-area-template.md
index 96261cee522..8b9e6a27a59 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/divide-the-grid-into-an-area-template.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/divide-the-grid-into-an-area-template.md
@@ -1,6 +1,6 @@
 ---
 id: 5a94fe0569fb03452672e45c
-title: Divide the Grid Into an Area Template
+title: 영역 템플릿으로 그리드 나누기
 challengeType: 0
 forumTopicId: 301130
 dashedName: divide-the-grid-into-an-area-template
@@ -8,7 +8,7 @@ dashedName: divide-the-grid-into-an-area-template
 
 # --description--
 
-You can group cells of your grid together into an <dfn>area</dfn> and give the area a custom name. Do this by using `grid-template-areas` on the container like this:
+그리드의 셀을 한 <dfn>영역(area)</dfn>으로 묶을 수 있고 그 영역에 이름을 줄 수 있습니다. 아래처럼 컨테이너에 `grid-template-areas`을 사용하면 가능합니다.
 
 ```css
 grid-template-areas:
@@ -17,15 +17,15 @@ grid-template-areas:
   "advert footer footer";
 ```
 
-The code above groups the cells of the grid into four areas: `header`, `advert`, `content`, and `footer`. Every word represents a cell and every pair of quotation marks represent a row.
+위 코드는 그리드의 셀을 다음과 같이 네 영역으로 묶습니다: `header`, `advert`, `content`, `footer`. 각 단어는 셀을 나타내며 각 한 쌍의 따옴표는 행을 나타냅니다.
 
 # --instructions--
 
-Change the template so the `footer` area spans the entire bottom row. Defining the areas won't have any visual effect right now. Later, you will make an item use an area to see how it works.
+템플릿을 변경하여 `footer` 영역이 전체 바닥 행을 늘리도록 만드세요. 영역을 정의하는 것은 즉시 시각적인 효과를 주지 않습니다. 이후에 어떻게 동작하는지 확인하기 위해 한 아이템이 한 영역을 사용하도록 만들 것입니다.
 
 # --hints--
 
-`container` class should have a `grid-template-areas` property similar to the example but with the `footer` area spanning the whole bottom row.
+`container` 클래스는 `footer` 영역이 전체 바닥 행을 늘리는 `grid-template-areas` 속성을 가져야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/limit-item-size-using-the-minmax-function.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/limit-item-size-using-the-minmax-function.md
index 12edd170d71..e0984199d96 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/limit-item-size-using-the-minmax-function.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/limit-item-size-using-the-minmax-function.md
@@ -1,6 +1,6 @@
 ---
 id: 5a94fe4469fb03452672e460
-title: Limit Item Size Using the minmax Function
+title: minmax 함수로 아이템 크기 제한하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cD97RTv'
 forumTopicId: 301131
@@ -9,21 +9,21 @@ dashedName: limit-item-size-using-the-minmax-function
 
 # --description--
 
-There's another built-in function to use with `grid-template-columns` and `grid-template-rows` called `minmax`. It's used to limit the size of items when the grid container changes size. To do this you need to specify the acceptable size range for your item. Here is an example:
+`grid-template-columns`와 `grid-template-rows`와 함께 사용할 수 있는 `minmax`라는 내장 함수가 있습니다. 그리드 컨테이너 크기가 변경될 때 아이템의 크기를 제한하는데 사용됩니다. 이를 위해 아이템에 수용할 수 있는 크기 범위를 지정해야 합니다. 여기 예시가 있습니다.
 
 ```css
 grid-template-columns: 100px minmax(50px, 200px);
 ```
 
-In the code above, `grid-template-columns` is set to create two columns; the first is 100px wide, and the second has the minimum width of 50px and the maximum width of 200px.
+위 코드에서 `grid-template-columns`는 두 열을 만들도록 설정되었습니다; 첫번째 열은 100px의 너비를 가지고 두번째 열은 최소 50px, 최대 200px의 너비를 가집니다.
 
 # --instructions--
 
-Using the `minmax` function, replace the `1fr` in the `repeat` function with a column size that has the minimum width of `90px` and the maximum width of `1fr`, and resize the preview panel to see the effect.
+`minmax` 함수를 사용하여 `repeat`안의 `1fr`를 최소 너비 `90px` 그리고 최대 너비 `1fr`를 가진 열 크기로 바꾼 후 미리보기 크기를 조정하여 효과를 확인하세요.
 
 # --hints--
 
-`container` class should have a `grid-template-columns` property that is set to repeat 3 columns with the minimum width of `90px` and maximum width of `1fr`.
+`container` 클래스는 최소 너비 `90px`와 최대 너비 `1fr`를 가진 3개의 열을 반복하도록 설정된 `grid-template-columns` 속성을 가져야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/place-items-in-grid-areas-using-the-grid-area-property.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/place-items-in-grid-areas-using-the-grid-area-property.md
index 048baf7d5c1..7be0de62772 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/place-items-in-grid-areas-using-the-grid-area-property.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/place-items-in-grid-areas-using-the-grid-area-property.md
@@ -1,6 +1,6 @@
 ---
 id: 5a94fe1369fb03452672e45d
-title: Place Items in Grid Areas Using the grid-area Property
+title: grid-area 속성으로 그리드 영역에 아이템 배치하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cRrqmtV'
 forumTopicId: 301132
@@ -9,7 +9,7 @@ dashedName: place-items-in-grid-areas-using-the-grid-area-property
 
 # --description--
 
-After creating an area template for your grid container, as shown in the previous challenge, you can place an item in your custom area by referencing the name you gave it. To do this, you use the `grid-area` property on an item like this:
+그리드 컨테이너에 대한 영역 템플릿을 이전 도전과 같이 생성한 후에는 원하는 아이템을 해당 이름을 참조하여 사용자 정의 영역에 배치할 수 있습니다. 이를 위해 다음과 같이 `grid-area` 속성을 사용하면 됩니다.
 
 ```css
 .item1 {
@@ -17,15 +17,15 @@ After creating an area template for your grid container, as shown in the previou
 }
 ```
 
-This lets the grid know that you want the `item1` class to go in the area named `header`. In this case, the item will use the entire top row because that whole row is named as the `header` area.
+이 속성은 그리드가 `header`라는 영역에 `item1` 클래스를 배치하길 원한다고 알려주는 역할을 합니다. 이 경우에 전체 행이 `header` 영역으로 이름이 주어졌기 때문에 아이템이 전체 상단 행을 사용할 것입니다.
 
 # --instructions--
 
-Place an element with the `item5` class in the `footer` area using the `grid-area` property.
+`grid-area` 속성을 사용하여 `item5` 클래스를 가진 요소를 `footer` 영역에 배치하세요.
 
 # --hints--
 
-`item5` class should have a `grid-area` property that has the value of `footer`.
+`item5` 클래스는 `footer` 값을 가진 `grid-area` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -50,7 +50,7 @@ assert(
     background: PaleGreen;
     /* Only change code below this line */
 
-    
+
     /* Only change code above this line */
   }
 
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/reduce-repetition-using-the-repeat-function.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/reduce-repetition-using-the-repeat-function.md
index 866df68471f..5d0507bafc1 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/reduce-repetition-using-the-repeat-function.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/reduce-repetition-using-the-repeat-function.md
@@ -1,6 +1,6 @@
 ---
 id: 5a94fe3669fb03452672e45f
-title: Reduce Repetition Using the repeat Function
+title: repeat 함수로 반복 줄이기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cQvqyHR'
 forumTopicId: 301133
@@ -9,37 +9,37 @@ dashedName: reduce-repetition-using-the-repeat-function
 
 # --description--
 
-When you used `grid-template-columns` and `grid-template-rows` to define the structure of a grid, you entered a value for each row or column you created.
+그리드의 구조를 정의하기 위해 `grid-template-columns`와 `grid-template-rows`를 사용했을 때, 생성한 각 행 혹은 열에 값을 입력했습니다.
 
-Let's say you want a grid with 100 rows of the same height. It isn't very practical to insert 100 values individually. Fortunately, there's a better way - by using the `repeat` function to specify the number of times you want your column or row to be repeated, followed by a comma and the value you want to repeat.
+똑같은 높이를 가진 100개의 행을 가진 그리드를 생각해 보겠습니다. 100개의 값을 일일이 넣는 것은 실용적이지 못합니다. 다행히 더 나은 방법이 있습니다 - 행 혹은 열이 반복 횟수와 쉼표와 반복되는 값을 `repeat`에 넣어 사용하면 됩니다.
 
-Here's an example that would create the 100 row grid, each row at 50px tall.
+여기 50px 높이를 준 100개의 행을 가진 그리드 예시가 있습니다.
 
 ```css
 grid-template-rows: repeat(100, 50px);
 ```
 
-You can also repeat multiple values with the repeat function and insert the function amongst other values when defining a grid structure. Here's what that looks like:
+또한 grid 구조를 정의할 때 repeat 함수로 여러 개의 값을 반복하고 다른 값들 사이에 해당 함수를 넣을 수도 있습니다. 다음과 같이 적용될 수 있습니다:
 
 ```css
 grid-template-columns: repeat(2, 1fr 50px) 20px;
 ```
 
-This translates to:
+이는 다음과 동일한 효과를 갖습니다:
 
 ```css
 grid-template-columns: 1fr 50px 1fr 50px 20px;
 ```
 
-**Note:** The `1fr 50px` is repeated twice followed by 20px.
+**주의:** 20px 전에 `1fr 50px`가 두 번 반복됩니다.
 
 # --instructions--
 
-Use `repeat` to remove repetition from the `grid-template-columns` property.
+`grid-template-columns` 속성에서 반복을 없애기 위해 `repeat`을 사용하세요.
 
 # --hints--
 
-`container` class should have a `grid-template-columns` property that is set to repeat 3 columns with the width of `1fr`.
+`container` 클래스는 `1fr` 너비를 가진 3개의 열을 반복하도록 설정된 `grid-template-columns` 속성을 가져야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-css-grid-units-to-change-the-size-of-columns-and-rows.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-css-grid-units-to-change-the-size-of-columns-and-rows.md
index 909ff110a23..3cefaeef22a 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-css-grid-units-to-change-the-size-of-columns-and-rows.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-css-grid-units-to-change-the-size-of-columns-and-rows.md
@@ -1,6 +1,6 @@
 ---
 id: 5a9036ee38fddaf9a66b5d34
-title: Use CSS Grid units to Change the Size of Columns and Rows
+title: 행열의 크기를 변경하기 위한 CSS 그리드 단위 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cvE8phd'
 forumTopicId: 301134
@@ -9,29 +9,29 @@ dashedName: use-css-grid-units-to-change-the-size-of-columns-and-rows
 
 # --description--
 
-You can use absolute and relative units like `px` and `em` in CSS Grid to define the size of rows and columns. You can use these as well:
+CSS 그리드에서 행열의 크기를 정의하기 위해 `px`와 `em`같이 절대/상대 단위를 사용할 수 있습니다. 다음과 같은 것도 사용할 수 있습니다:
 
-`fr`: sets the column or row to a fraction of the available space,
+`fr`: 행 혹은 열을 사용 가능한 공간의 일부로 설정,
 
-`auto`: sets the column or row to the width or height of its content automatically,
+`auto`: 행 혹은 열을 자동적으로 그 내용의 너비나 높이로 설정
 
-`%`: adjusts the column or row to the percent width of its container.
+`%`: 행 혹은 열을 컨테이너 너비의 백분율로 조정
 
-Here's the code that generates the output in the preview:
+여기 프리뷰에서 결과를 생성하는 코드입니다:
 
 ```css
 grid-template-columns: auto 50px 10% 2fr 1fr;
 ```
 
-This snippet creates five columns. The first column is as wide as its content, the second column is 50px, the third column is 10% of its container, and for the last two columns; the remaining space is divided into three sections, two are allocated for the fourth column, and one for the fifth.
+이 코드는 다섯 개의 열을 생성합니다. 첫 번째 열은 내용의 너비만큼, 두 번째 열은 50px, 세 번째 열은 컨테이너의 10%로 설정되며, 마지막 두 열에 대해서는 나머지 공간이 세 구역으로 나누어지고, 네 번째 열에는 두 구역이 할당되고, 다섯 번째 열에는 하나가 할당됩니다.
 
 # --instructions--
 
-Make a grid with three columns whose widths are as follows: 1fr, 100px, and 2fr.
+1fr, 100px 및 2fr의 너비를 갖는 세 열로 구성된 그리드를 만드세요.
 
 # --hints--
 
-Your `container` class should have a `grid-template-columns` property that has three columns with the following widths: `1fr`, `100px`, and `2fr`.
+`container` 클래스는 `1fr`, `100px` 그리고 `2fr` 너비를 준 세 개의 열을 가진 `grid-template-columns` 속성을 가져야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-grid-area-without-creating-an-areas-template.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-grid-area-without-creating-an-areas-template.md
index 08aab8eb71d..b7a92cb62bf 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-grid-area-without-creating-an-areas-template.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-grid-area-without-creating-an-areas-template.md
@@ -1,6 +1,6 @@
 ---
 id: 5a94fe2669fb03452672e45e
-title: Use grid-area Without Creating an Areas Template
+title: 영역 템플릿 생성하지 않고 grid-area 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/c6N7VhK'
 forumTopicId: 301135
@@ -9,27 +9,27 @@ dashedName: use-grid-area-without-creating-an-areas-template
 
 # --description--
 
-The `grid-area` property you learned in the last challenge can be used in another way. If your grid doesn't have an areas template to reference, you can create an area on the fly for an item to be placed like this:
+이전 과제에서 배운 `grid-area` 속성은 다른 방식으로 사용될 수 있습니다. 그리드가 참조할 영역 템플릿이 없다면 다음과 같이 배치될 아이템에 동적으로 영역을 생성할 수 있습니다.
 
 ```css
 item1 { grid-area: 1/1/2/4; }
 ```
 
-This is using the line numbers you learned about earlier to define where the area for this item will be. The numbers in the example above represent these values:
+아이템 영역의 위치를 정의하기 위해 이전에 배운 라인 번호를 사용합니다. 위 예시의 번호들은 다음 값들을 나타냅니다:
 
 ```css
 grid-area: horizontal line to start at / vertical line to start at / horizontal line to end at / vertical line to end at;
 ```
 
-So the item in the example will consume the rows between lines 1 and 2, and the columns between lines 1 and 4.
+예시에 있는 아이템은 라인 1과 2 사이의 행과 라인 1과 4 사이의 열을 차지할 것입니다.
 
 # --instructions--
 
-Using the `grid-area` property, place the element with `item5` class between the third and fourth horizontal lines and between the first and fourth vertical lines.
+`grid-area` 속성을 사용하여 `item5` 클래스를 가진 요소를 수평으로 세 번째와 네 번째, 그리고 수직으로 첫 번째와 네 번째 사이에 배치하세요.
 
 # --hints--
 
-The `item5` class should have a `grid-area` property to make it fill the whole area between the third and fourth horizontal lines, and first and fourth vertical lines.
+`item5` 클래스는 수평으로 세 번째와 네 번째 라인 사이, 그리고 수직으로 첫 번째와 네 번째 라인 사이의 전체 영역을 채우기 위해 `grid-area` 속성을 가져야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-grid-column-to-control-spacing.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-grid-column-to-control-spacing.md
index 42a72dcd35f..3fb1a7891b2 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-grid-column-to-control-spacing.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-grid-column-to-control-spacing.md
@@ -1,6 +1,6 @@
 ---
 id: 5a90372638fddaf9a66b5d38
-title: Use grid-column to Control Spacing
+title: 간격 제어를 위한 grid-column 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cnzkDSr'
 forumTopicId: 301136
@@ -9,31 +9,31 @@ dashedName: use-grid-column-to-control-spacing
 
 # --description--
 
-Up to this point, all the properties that have been discussed are for grid containers. The `grid-column` property is the first one for use on the grid items themselves.
+지금까지 살펴본 모든 속성은 그리드 컨테이너를 위한 것입니다. `grid-column` 속성은 그리드 아이템 자체에 사용되는 첫 번째 속성입니다.
 
-The hypothetical horizontal and vertical lines that create the grid are referred to as <dfn>lines</dfn>. These lines are numbered starting with 1 at the top left corner of the grid and move right for columns and down for rows, counting upward.
+그리드를 생성하는 가상의 수평, 수직선을 <dfn>라인</dfn>이라고 합니다. 이 라인들은 그리드의 왼쪽 모서리에서 1로 시작하여 열로는 오른쪽 행으로는 아래로 하나씩 증가한 숫자가 매겨집니다.
 
-This is what the lines look like for a 3x3 grid:
+다음은 3x3 그리드의 라인 형태입니다.
 
-<div style='position:relative;margin:auto;background:Gainsboro;display:block;margin-top:100px;margin-bottom:50px;width:200px;height:200px;'><p style='left:25%;top:-30%;font-size:130%;position:absolute;color:RoyalBlue;'>column lines</p><p style='left:0%;top:-15%;font-size:130%;position:absolute;color:RoyalBlue;'>1</p><p style='left:30%;top:-15%;font-size:130%;position:absolute;color:RoyalBlue;'>2</p><p style='left:63%;top:-15%;font-size:130%;position:absolute;color:RoyalBlue;'>3</p><p style='left:95%;top:-15%;font-size:130%;position:absolute;color:RoyalBlue;'>4</p><p style='left:-40%;top:45%;font-size:130%;transform:rotateZ(-90deg);position:absolute;'>row lines</p><p style='left:-10%;top:-10%;font-size:130%;position:absolute;'>1</p><p style='left:-10%;top:21%;font-size:130%;position:absolute;'>2</p><p style='left:-10%;top:53%;font-size:130%;position:absolute;'>3</p><p style='left:-10%;top:85%;font-size:130%;position:absolute;'>4</p><div style='left:0%;top:0%;width:5%;height:100%;background:RoyalBlue;position:absolute;'></div><div style='left:31%;top:0%;width:5%;height:100%;background:RoyalBlue;position:absolute;'></div><div style='left:63%;top:0%;width:5%;height:100%;background:RoyalBlue;position:absolute;'></div><div style='left:95%;top:0%;width:5%;height:100%;background:RoyalBlue;position:absolute;'></div><div style='left:0%;top:0%;width:100%;height:5%;background:black;position:absolute;'></div><div style='left:0%;top:31%;width:100%;height:5%;background:black;position:absolute;'></div><div style='left:0%;top:63%;width:100%;height:5%;background:black;position:absolute;'></div><div style='left:0%;top:95%;width:100%;height:5%;background:black;position:absolute;'></div></div>
+<div style='position:relative;margin:auto;background:Gainsboro;display:block;margin-top:100px;margin-bottom:50px;width:200px;height:200px;'><p style='left:25%;top:-30%;font-size:130%;position:absolute;color:RoyalBlue;'>열 라인</p><p style='left:0%;top:-15%;font-size:130%;position:absolute;color:RoyalBlue;'>1</p><p style='left:30%;top:-15%;font-size:130%;position:absolute;color:RoyalBlue;'>2</p><p style='left:63%;top:-15%;font-size:130%;position:absolute;color:RoyalBlue;'>3</p><p style='left:95%;top:-15%;font-size:130%;position:absolute;color:RoyalBlue;'>4</p><p style='left:-40%;top:45%;font-size:130%;transform:rotateZ(-90deg);position:absolute;'>행 라인</p><p style='left:-10%;top:-10%;font-size:130%;position:absolute;'>1</p><p style='left:-10%;top:21%;font-size:130%;position:absolute;'>2</p><p style='left:-10%;top:53%;font-size:130%;position:absolute;'>3</p><p style='left:-10%;top:85%;font-size:130%;position:absolute;'>4</p><div style='left:0%;top:0%;width:5%;height:100%;background:RoyalBlue;position:absolute;'></div><div style='left:31%;top:0%;width:5%;height:100%;background:RoyalBlue;position:absolute;'></div><div style='left:63%;top:0%;width:5%;height:100%;background:RoyalBlue;position:absolute;'></div><div style='left:95%;top:0%;width:5%;height:100%;background:RoyalBlue;position:absolute;'></div><div style='left:0%;top:0%;width:100%;height:5%;background:black;position:absolute;'></div><div style='left:0%;top:31%;width:100%;height:5%;background:black;position:absolute;'></div><div style='left:0%;top:63%;width:100%;height:5%;background:black;position:absolute;'></div><div style='left:0%;top:95%;width:100%;height:5%;background:black;position:absolute;'></div></div>
 
-To control the number of columns an item will consume, you can use the `grid-column` property in conjunction with the line numbers you want the item to start and stop at.
+아이템이 차지할 열의 수를 제어하려면, 원하는 라인 번호와 함께 아이템이 시작하고 끝날 위치를 지정하는 `grid-column` 속성을 사용할 수 있습니다.
 
-Here's an example:
+여기 예시가 있습니다.
 
 ```css
 grid-column: 1 / 3;
 ```
 
-This will make the item start at the first vertical line of the grid on the left and span to the 3rd line of the grid, consuming two columns.
+이렇게 하면 항목이 그리드의 왼쪽에 있는 첫 번째 수직 라인에서 시작하여 그리드의 3번째 라인까지 이어지며, 두 개의 열을 차지합니다.
 
 # --instructions--
 
-Make the item with the class `item5` consume the last two columns of the grid.
+`item5` 클래스를 가진 아이템이 그리드의 마지막 두 열을 차지하도록 만드세요.
 
 # --hints--
 
-`item5` class should have a `grid-column` property.
+`item5` 클래스는 `grid-column` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -43,7 +43,7 @@ assert(
 );
 ```
 
-`item5` class should have a `grid-column` property which results in it consuming the last two columns of the grid.
+`item5` 클래스는 그리드의 마지막 두 열을 차지하도록 하는 `grid-column` 속성을 가져야 합니다.
 
 ```js
 const colStart = getComputedStyle($('.item5')[0]).gridColumnStart;
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-grid-row-to-control-spacing.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-grid-row-to-control-spacing.md
index 93a364f7da0..3b2e6baea81 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-grid-row-to-control-spacing.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-grid-row-to-control-spacing.md
@@ -1,6 +1,6 @@
 ---
 id: 5a90373638fddaf9a66b5d39
-title: Use grid-row to Control Spacing
+title: 간격 제어를 위한 grid-row 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/c9WBLU4'
 forumTopicId: 301137
@@ -9,15 +9,15 @@ dashedName: use-grid-row-to-control-spacing
 
 # --description--
 
-Of course, you can make items consume multiple rows just like you can with columns. You define the horizontal lines you want an item to start and stop at using the `grid-row` property on a grid item.
+열과 마찬가지로 아이템이 여러 행을 차지하도록 만들 수 있습니다. 아이템이 시작하고 끝나길 원하는 수평 라인은 그리드 항목의 `grid-row` 속성을 사용하여 정의합니다.
 
 # --instructions--
 
-Make the element with the `item5` class consume the last two rows.
+`item5` 클래스를 가진 요소가 마지막 두 행을 차지하도록 만드세요.
 
 # --hints--
 
-`item5` class should have a `grid-row` property.
+`item5` 클래스는 `grid-row` 속성을 가져야 합니다.
 
 ```js
 assert(
@@ -25,7 +25,7 @@ assert(
 );
 ```
 
-`item5` class should have a `grid-row` property which results in it consuming the last two rows of the grid.
+`item5` 클래스는 그리드의 마지막 두 행을 차지하도록 하는 `grid-row` 속성을 가져야 합니다.
 
 ```js
 const rowStart = getComputedStyle($('.item5')[0]).gridRowStart;
diff --git a/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-media-queries-to-create-responsive-layouts.md b/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-media-queries-to-create-responsive-layouts.md
index a973031154d..7afca2cd899 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-media-queries-to-create-responsive-layouts.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/css-grid/use-media-queries-to-create-responsive-layouts.md
@@ -1,6 +1,6 @@
 ---
 id: 5a94fe7769fb03452672e463
-title: Use Media Queries to Create Responsive Layouts
+title: 반응형 레이아웃 생성을 위한 미디어 쿼리 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pByETK/cMbqeHk'
 forumTopicId: 301138
@@ -9,17 +9,17 @@ dashedName: use-media-queries-to-create-responsive-layouts
 
 # --description--
 
-CSS Grid can be an easy way to make your site more responsive by using media queries to rearrange grid areas, change dimensions of a grid, and rearrange the placement of items.
+CSS 그리드는 미디어 쿼리를 사용하여 그리드 영역을 재배치하고 그리드의 차원을 변경하며 항목의 배치를 재조정하여 웹사이트를 보다 반응형으로 만드는 간편한 방법이 될 수 있습니다.
 
-In the preview, when the viewport width is 300px or more, the number of columns changes from 1 to 2. The advertisement area then occupies the left column completely.
+미리보기에서 viewport 너비가 300px 이상일 때 열의 수가 1에서 2로 변합니다. 그런 다음 광고 영역은 완전히 왼쪽 열을 차지합니다.
 
 # --instructions--
 
-When the viewport width is `400px` or more, make the header area occupy the top row completely and the footer area occupy the bottom row completely.
+viewport 너비가 `400px` 이상일 때 헤더 영역이 상단 행을 완전히 차지하고 푸터 영역이 하단 행을 완전히 차지하도록 만드시오.
 
 # --hints--
 
-When the viewport is `400px` or more, `container` class should have a `grid-template-areas` property in which the header and footer areas occupy the top and bottom rows respectively and advert and content occupy the left and right columns of the middle row.
+viewport가 `400px` 이상인 경우, `container` 클래스는 헤더와 푸터 영역이 각각 상단과 하단 행을 차지하고 광고와 내용이 가운데 행의 왼쪽과 오른쪽 열을 차지하는 `grid-template-areas` 속성을 가져야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/create-a-media-query.md b/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/create-a-media-query.md
index f126c72dc98..29c982310da 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/create-a-media-query.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/create-a-media-query.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78b0367417b2b2512b08
-title: Create a Media Query
+title: 미디어 쿼리 생성하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pzrPu4/cqwKrtm'
 forumTopicId: 301139
@@ -9,45 +9,45 @@ dashedName: create-a-media-query
 
 # --description--
 
-Media Queries are a new technique introduced in CSS3 that change the presentation of content based on different viewport sizes. The viewport is a user's visible area of a web page, and is different depending on the device used to access the site.
+미디어 쿼리는 CSS3에 도입된 새로운 기술로, 다른 뷰포트 사이즈에 따라 어떻게 내용을 표시할지 변경합니다. 뷰포트는 웹 페이지에서의 유저의 시각적 영역으로, 해당 사이트를 접속하는 데 쓰인 단말기에 따라 달라집니다.
 
-Media Queries consist of a media type, and if that media type matches the type of device the document is displayed on, the styles are applied. You can have as many selectors and styles inside your media query as you want.
+미디어 쿼리는 미디어 유형을 활용하며, 이 미디어 유형이 해당 웹 문서가 보여지는 단말기의 유형과 일치하면 스타일이 적용되는 식입니다. 여러분은 원하는 만큼 많이 다양한 선택자와 스타일 안에 미디어 쿼리를 사용할 수 있습니다.
 
-Here's an example of a media query that returns the content when the device's width is less than or equal to `100px`:
+아래는 단말기의 가로 길이가 `100px`보다 작거나 같을 경우 해당 내용을 반환하는 미디어 쿼리에 대한 예제입니다.
 
 ```css
 @media (max-width: 100px) { /* CSS Rules */ }
 ```
 
-and the following media query returns the content when the device's height is more than or equal to `350px`:
+아래는 단말기의 세로 길이가 `350px`보다 길거나 같을 경우 해당 내용을 반환하는 미디어 쿼리 예제입니다.
 
 ```css
 @media (min-height: 350px) { /* CSS Rules */ }
 ```
 
-Remember, the CSS inside the media query is applied only if the media type matches that of the device being used.
+미디어 쿼리 내부의 CSS는 오직 해당 미디어의 유형이 현재 사용되는 단말기의 것과 일치해야만 적용된다는 것을 기억해두세요.
 
 # --instructions--
 
-Add a media query, so that the `p` tag has a `font-size` of `10px` when the device's height is less than or equal to `800px`.
+단말기의 세로 길이가 `800px`보다 짧거나 같을 때 `p` 태그가 `10px`의 `font-size`를 가지도록 미디어 쿼리를 추가해보세요.
 
 # --hints--
 
-You should declare a `@media` query for devices with a `height` less than or equal to `800px`.
+여러분은 `height`가 `800px`보다 작거나 같은 경우의 단말기에 적용할 `@media` 쿼리를 선언해야 합니다.
 
 ```js
 const media = new __helpers.CSSHelp(document).getCSSRules('media');
 assert(media.some(x => x.media?.mediaText?.includes('(max-height: 800px)')));
 ```
 
-Your `p` element should have a `font-size` of `10px` when the device `height` is less than or equal to `800px`.
+`p` 요소는 단말기의 `height`가 `800px`보다 작거나 같을 경우 `font-size`가 `10px`이어야 합니다.
 
 ```js
 const rules = new __helpers.CSSHelp(document).getRuleListsWithinMedia('(max-height: 800px)');
 assert(rules?.find(x => x.selectorText === 'p')?.style?.fontSize === "10px");
 ```
 
-Your `p` element should have an initial `font-size` of `20px` when the device `height` is more than `800px`.
+`p` 요소는 단말기의 `height`가 `800px`보다 큰 경우 `font-size`의 초기값으로 `20px`을 가집니다.
 
 ```js
 const ifPFirst = new __helpers.CSSHelp(document).getCSSRules()?.find(x => x?.selectorText === 'p' || x?.media);
diff --git a/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/make-an-image-responsive.md b/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/make-an-image-responsive.md
index 72bb0a43a2b..b33a06d732a 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/make-an-image-responsive.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/make-an-image-responsive.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78b1367417b2b2512b09
-title: Make an Image Responsive
+title: 반응형 이미지 만들기
 challengeType: 0
 forumTopicId: 301140
 dashedName: make-an-image-responsive
@@ -8,7 +8,7 @@ dashedName: make-an-image-responsive
 
 # --description--
 
-Making images responsive with CSS is actually very simple. You just need to add these properties to an image:
+CSS로 반응형 이미지 만들기는 아주 간단합니다. 이미지에 아래 속성을 추가하기만 하면 됩니다.
 
 ```css
 img {
@@ -17,21 +17,21 @@ img {
 }
 ```
 
-The `max-width` of `100%` will make sure the image is never wider than the container it is in, and the `height` of `auto` will make the image keep its original aspect ratio.
+`max-width`를 `100%`로 설정하면 이미지를 감싸는 컨테이너보다 이미지가 더 넓어지지 않도록 해주며, `height`를 `auto`로 설정하면 이미지의 원본 비율이 유지됩니다.
 
 # --instructions--
 
-Add the style rules to the `responsive-img` class to make it responsive. It should never be wider than its container (in this case, it's the preview window) and it should keep its original aspect ratio. After you have added your code, resize the preview to see how your images behave.
+`responsive-img` 클래스에 스타일 규칙 적용해 반응형으로 만들어 보세요. 해당 클래스는 이를 감싸는 컨테이너(여기에서는 미리보기 창입니다)보다 넓어지면 안 되고, 이미지는 원본 비율을 지켜야 합니다. 코드를 추가한 뒤에, 미리보기 창을 조절해가며 어떻게 이미지가 동작하는지 확인해보세요.
 
 # --hints--
 
-Your `responsive-img` class should have a `max-width` set to `100%`.
+여러분의 `responsive-img` 클래스는 `max-width`가 `100%`로 설정되어야 합니다.
 
 ```js
 assert(getComputedStyle($('.responsive-img')[0]).maxWidth === '100%');
 ```
 
-Your `responsive-img` class should have a `height` set to `auto`.
+`responsive-img` 클래스는 `height`가 `auto`로 설정되어야 합니다.
 
 ```js
 assert(code.match(/height:\s*?auto;/g));
diff --git a/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/make-typography-responsive.md b/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/make-typography-responsive.md
index bf80e0c75ef..760bfff592a 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/make-typography-responsive.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/make-typography-responsive.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78b1367417b2b2512b0c
-title: Make Typography Responsive
+title: 텍스트를 반응형으로 만들기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pzrPu4/crzN7T8'
 forumTopicId: 301141
@@ -9,13 +9,13 @@ dashedName: make-typography-responsive
 
 # --description--
 
-Instead of using `em` or `px` to size text, you can use viewport units for responsive typography. Viewport units, like percentages, are relative units, but they are based off different items. Viewport units are relative to the viewport dimensions (width or height) of a device, and percentages are relative to the size of the parent container element.
+글자 크기 조정을 위해 `em`혹은 `px` 사용하는 대신에 반응형 텍스트를 위한 뷰포트 단위를 사용할 수 있습니다. 백분율같은 뷰포트 단위는 상대적 단위지만 다른 아이템들에 기준을 둡니다. 뷰포트 단위는 기기의 뷰포트 차원(너비, 높이)에 상대적이고 백분율은 부모 컨테이너의 크기에 상대적입니다.
 
-The four different viewport units are:
+네 개의 뷰포트 유닛이 있습니다.
 
-<ul><li><code>vw</code> (viewport width): <code>10vw</code> would be 10% of the viewport's width.</li><li><code>vh</code> (viewport height): <code>3vh</code> would be 3% of the viewport's height.</li><li><code>vmin</code> (viewport minimum): <code>70vmin</code> would be 70% of the viewport's smaller dimension (height or width).</li><li><code>vmax</code> (viewport maximum): <code>100vmax</code> would be 100% of the viewport's bigger dimension (height or width).</li></ul>
+<ul><li><code>vw</code> (뷰포트 너비): <code>10vw</code>는 뷰포트 너비의 10%입니다.</li><li><code>vh</code> (뷰포트 높이): <code>3vh</code>는 뷰포트 높이의 3%입니다.</li><li><code>vmin</code> (뷰포트 최소값): <code>70vmin</code>는 뷰포트의 더 작은 차원(높이 혹은 너비)의 70%입니다.</li><li><code>vmax</code> (뷰포트 최대값): <code>100vmax</code>는 뷰포트의 더 큰 차원(높이 혹은 너비)의 100%입니다.</li></ul>
 
-Here is an example that sets a `body` tag to 30% of the viewport's width.
+역 `body` 태그를 뷰포트 너비의 30%로 설정하는 예시입니다.
 
 ```css
 body { width: 30vw; }
@@ -23,11 +23,11 @@ body { width: 30vw; }
 
 # --instructions--
 
-Set the `width` of the `h2` tag to 80% of the viewport's width and the `width` of the paragraph as 75% of the viewport's smaller dimension.
+`h2` 태그의 `width`를 뷰포트의 너비의 80% 그리고 그 문단의 `width`를 뷰포트의 더 작은 차원의 75%로 설정하세요.
 
 # --hints--
 
-Your `h2` tag should have a `width` of 80vw.
+`h2` 태그는 80vw `width`를 가져야 합니다.
 
 ```js
 assert(
@@ -37,7 +37,7 @@ assert(
 );
 ```
 
-Your `p` tag should have a `width` of 75vmin.
+`p` 태그는 75vmin `width`를 가져야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/use-a-retina-image-for-higher-resolution-displays.md b/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/use-a-retina-image-for-higher-resolution-displays.md
index 2e426957ae0..571ec2a846a 100644
--- a/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/use-a-retina-image-for-higher-resolution-displays.md
+++ b/curriculum/challenges/korean/01-responsive-web-design/responsive-web-design-principles/use-a-retina-image-for-higher-resolution-displays.md
@@ -1,6 +1,6 @@
 ---
 id: 587d78b1367417b2b2512b0a
-title: Use a Retina Image for Higher Resolution Displays
+title: 고해상도 디스플레이를 위한 레티나 이미지 사용하기
 challengeType: 0
 videoUrl: 'https://scrimba.com/p/pzrPu4/cVZ4Rfp'
 forumTopicId: 301142
@@ -9,9 +9,9 @@ dashedName: use-a-retina-image-for-higher-resolution-displays
 
 # --description--
 
-With the increase of internet connected devices, their sizes and specifications vary, and the displays they use could be different externally and internally. Pixel density is an aspect that could be different on one device from others and this density is known as Pixel Per Inch(PPI) or Dots Per Inch(DPI). The most famous such display is the one known as a "Retina Display" on the latest Apple MacBook Pro notebooks, and recently iMac computers. Due to the difference in pixel density between a "Retina" and "Non-Retina" displays, some images that have not been made with a High-Resolution Display in mind could look "pixelated" when rendered on a High-Resolution display.
+인터넷으로 연결된 장치의 증가로 인해 그것들의 크기와 사양들은 다양하고 사용되는 디스플레이는 내외적으로 다를 수 있습니다. 화소 밀도는 한 기기에서 다른 기기와 다를 수 있는 측면으로, 이 밀도는 화소 당 인치(PPI) 또는 도트 당 인치(DPI)로 알려져 있습니다. 가장 유명한 디스플레이는 최신 애플 맥북 그리고 최근에 아이맥 컴퓨터에 있는 "레티나 디스플레이"로 알려져 있습니다. "레티나"와 "비-레티나" 디스플레이 간의 픽셀 밀도 차이로 인해, 고해상도 디스플레이에서 렌더링될 때 일부 고해상도 디스플레이를 고려하지 않고 만들어진 이미지는 "픽셀화"된 것처럼 보일 수 있습니다.
 
-The simplest way to make your images properly appear on High-Resolution Displays, such as the MacBook Pros "retina display" is to define their `width` and `height` values as only half of what the original file is. Here is an example of an image that is only using half of the original height and width:
+맥북 프로 "레티나 디스플레이"같이 고해상도 디스플레이에서 이미지를 잘 보이도록 만드는 가장 간단한 방법은 이미지의 `width`와 `height` 를 원래 파일의 반절로 정의하는 것입니다. 여기 본래의 높이와 너비의 반절을 사용하는 이미지 예시가 있습니다.
 
 ```html
 <style>
@@ -22,17 +22,17 @@ The simplest way to make your images properly appear on High-Resolution Displays
 
 # --instructions--
 
-Set the `width` and `height` of the `img` tag to half of their original values. In this case, both the original `height` and the original `width` are `200px`.
+`img` 태그의 `width`와 `height`를 원래 값의 반절로 설정하세요. 이 경우에 원래 `height`와 `width`는 `200px`입니다.
 
 # --hints--
 
-Your `img` tag should have a `width` of 100 pixels.
+`img` 태그는 100px의 `width`를 가져야 합니다.
 
 ```js
 assert(document.querySelector('img').width === 100);
 ```
 
-Your `img` tag should have a `height` of 100 pixels.
+`img` 태그는 100px의 `height`를 가져야 합니다.
 
 ```js
 assert(document.querySelector('img').height === 100);
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/check-for-the-presence-of-an-element-with-indexof.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/check-for-the-presence-of-an-element-with-indexof.md
index e9a2f2dbb12..04da3603624 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/check-for-the-presence-of-an-element-with-indexof.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/check-for-the-presence-of-an-element-with-indexof.md
@@ -10,7 +10,7 @@ dashedName: check-for-the-presence-of-an-element-with-indexof
 
 Since arrays can be changed, or *mutated*, at any time, there's no guarantee about where a particular piece of data will be on a given array, or if that element even still exists. Luckily, JavaScript provides us with another built-in method, `indexOf()`, that allows us to quickly and easily check for the presence of an element on an array. `indexOf()` takes an element as a parameter, and when called, it returns the position, or index, of that element, or `-1` if the element does not exist on the array.
 
-For example:
+예시:
 
 ```js
 let fruits = ['apples', 'pears', 'oranges', 'peaches', 'pears'];
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/check-if-an-object-has-a-property.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/check-if-an-object-has-a-property.md
index f5d95e40137..cd848ed5010 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/check-if-an-object-has-a-property.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/check-if-an-object-has-a-property.md
@@ -43,7 +43,7 @@ assert(
 );
 ```
 
-The function `isEveryoneHere` should return `true` if `Alan`, `Jeff`, `Sarah`, and `Ryan` are properties on the object passed to it. 
+The function `isEveryoneHere` should return `true` if `Alan`, `Jeff`, `Sarah`, and `Ryan` are properties on the object passed to it.
 
 ```js
 assert(isEveryoneHere(users) === true);
@@ -119,7 +119,7 @@ let users = {
 
 function isEveryoneHere(userObj) {
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-using-splice.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-using-splice.md
index f1b6ea28e5f..e3051ea8bb7 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-using-splice.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-data-structures/remove-items-using-splice.md
@@ -10,7 +10,7 @@ dashedName: remove-items-using-splice
 
 Ok, so we've learned how to remove elements from the beginning and end of arrays using `shift()` and `pop()`, but what if we want to remove an element from somewhere in the middle? Or remove more than one element at once? Well, that's where `splice()` comes in. `splice()` allows us to do just that: **remove any number of consecutive elements** from anywhere in an array.
 
-`splice()` can take up to 3 parameters, but for now, we'll focus on just the first 2. The first two parameters of `splice()` are integers which represent indexes, or positions, of items in the array that `splice()` is being called upon. And remember, arrays are *zero-indexed*, so to indicate the first element of an array, we would use `0`. `splice()`'s first parameter represents the index on the array from which to begin removing elements, while the second parameter indicates the number of elements to delete. For example:
+`splice()` can take up to 3 parameters, but for now, we'll focus on just the first 2. The first two parameters of `splice()` are integers which represent indexes, or positions, of items in the array that `splice()` is being called upon. And remember, arrays are *zero-indexed*, so to indicate the first element of an array, we would use `0`. `splice()`'s first parameter represents the index on the array from which to begin removing elements, while the second parameter indicates the number of elements to delete. 예시:
 
 ```js
 let array = ['today', 'was', 'not', 'so', 'great'];
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/access-multi-dimensional-arrays-with-indexes.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/access-multi-dimensional-arrays-with-indexes.md
index 134359ce86b..4921bfa8f02 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/access-multi-dimensional-arrays-with-indexes.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/access-multi-dimensional-arrays-with-indexes.md
@@ -26,8 +26,7 @@ const nestedSubarray = arr[3][0];
 const element = arr[3][0][1];
 ```
 
-In this example, `subarray` has the value `[[10, 11, 12], 13, 14]`,
-`nestedSubarray` has the value `[10, 11, 12]`,   and `element` has the value `11` .
+In this example, `subarray` has the value `[[10, 11, 12], 13, 14]`, `nestedSubarray` has the value `[10, 11, 12]`,   and `element` has the value `11` .
 
 **Note:** There shouldn't be any spaces between the array name and the square brackets, like `array [0][0]` and even this `array [0] [0]` is not allowed. Although JavaScript is able to process this correctly, this may confuse other programmers reading your code.
 
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/concatenating-strings-with-plus-operator.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/concatenating-strings-with-plus-operator.md
index 3aaeab380f7..a0353053a7b 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/concatenating-strings-with-plus-operator.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/concatenating-strings-with-plus-operator.md
@@ -25,7 +25,7 @@ Example:
 const ourStr = "I come first. " + "I come second.";
 ```
 
-The string `I come first. I come second.` would be displayed in the console.
+콘솔에 문자열 `I come first. I come second.` 가 표시 될것입니다.
 # --instructions--
 
 Build `myStr` from the strings `This is the start.` and `This is the end.` using the `+` operator. Be sure to include a space between the two strings.
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/constructing-strings-with-variables.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/constructing-strings-with-variables.md
index ba170cf1d59..7bad4a3053e 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/constructing-strings-with-variables.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/constructing-strings-with-variables.md
@@ -22,7 +22,7 @@ const ourStr = "Hello, our name is " + ourName + ", how are you?";
 
 # --instructions--
 
-Set `myName` to a string equal to your name and build `myStr` with `myName` between the strings `My name is ` and ` and I am well!`
+Set `myName` to a string equal to your name and build `myStr` with `myName` between the strings `My name is` and `and I am well!`
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/counting-cards.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/counting-cards.md
index b640a6dbb9e..118d30d8c7f 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/counting-cards.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/counting-cards.md
@@ -20,8 +20,7 @@ You will write a card counting function. It will receive a `card` parameter, whi
 **Example Outputs:** `-3 Hold` or `5 Bet`
 
 **Hint**  
-Do NOT reset `count` to 0 when value is 7, 8, or 9.  
-Do NOT return an array.  
+Do NOT reset `count` to 0 when value is 7, 8, or 9. Do NOT return an array.  
 Do NOT include quotes (single or double) in the output.
 
 # --hints--
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/delete-properties-from-a-javascript-object.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/delete-properties-from-a-javascript-object.md
index 480148c2f4d..d224c8ebd47 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/delete-properties-from-a-javascript-object.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/delete-properties-from-a-javascript-object.md
@@ -15,7 +15,7 @@ We can also delete properties from objects like this:
 delete ourDog.bark;
 ```
 
-Example:
+예:
 
 ```js
 const ourDog = {
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/nesting-for-loops.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/nesting-for-loops.md
index 4853e4666b6..eee67203cf6 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/nesting-for-loops.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/nesting-for-loops.md
@@ -9,7 +9,7 @@ dashedName: nesting-for-loops
 
 # --description--
 
-If you have a multi-dimensional array, you can use the same logic as the prior waypoint to loop through both the array and any sub-arrays. Here is an example:
+If you have a multi-dimensional array, you can use the same logic as the prior waypoint to loop through both the array and any sub-arrays. 여기 예시가 있습니다.
 
 ```js
 const arr = [
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/return-early-pattern-for-functions.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/return-early-pattern-for-functions.md
index 6ac3cf9536e..9715325ac9d 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/return-early-pattern-for-functions.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/return-early-pattern-for-functions.md
@@ -11,7 +11,7 @@ dashedName: return-early-pattern-for-functions
 
 When a `return` statement is reached, the execution of the current function stops and control returns to the calling location.
 
-**Example**
+**예)**
 
 ```js
 function myFun() {
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/stand-in-line.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/stand-in-line.md
index acb85f3b8eb..0f84e21f874 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/stand-in-line.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/stand-in-line.md
@@ -92,7 +92,7 @@ testArr = [1,2,3,4,5];
 ```js
 function nextInLine(arr, item) {
   // Only change code below this line
-  
+
   return item;
   // Only change code above this line
 }
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/testing-objects-for-properties.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/testing-objects-for-properties.md
index e7b68bac781..d55469f18aa 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/testing-objects-for-properties.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/testing-objects-for-properties.md
@@ -10,7 +10,7 @@ dashedName: testing-objects-for-properties
 
 To check if a property on a given object exists or not, you can use the `.hasOwnProperty()` method. `someObject.hasOwnProperty(someProperty)` returns `true` or `false` depending on if the property is found on the object or not.
 
-**Example**
+**예)**
 
 ```js
 function checkForProperty(object, property) {
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-undefined-value-returned-from-a-function.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-undefined-value-returned-from-a-function.md
index 6dd4f30f69b..5cf0fdb9ea2 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-undefined-value-returned-from-a-function.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-undefined-value-returned-from-a-function.md
@@ -11,7 +11,7 @@ dashedName: understanding-undefined-value-returned-from-a-function
 
 A function can include the `return` statement but it does not have to. In the case that the function doesn't have a `return` statement, when you call it, the function processes the inner code but the returned value is `undefined`.
 
-**Example**
+**예)**
 
 ```js
 let sum = 0;
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/use-conditional-logic-with-if-statements.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/use-conditional-logic-with-if-statements.md
index 4e2ae7d67e2..9e5fffbc103 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/use-conditional-logic-with-if-statements.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/use-conditional-logic-with-if-statements.md
@@ -17,7 +17,7 @@ When the condition evaluates to `true`, the program executes the statement insid
 
 <blockquote>if (<i>condition is true</i>) {<br>  <i>statement is executed</i><br>}</blockquote>
 
-**Example**
+**예:**
 
 ```js
 function test(myCondition) {
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/use-multiple-conditional-ternary-operators.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/use-multiple-conditional-ternary-operators.md
index 48521473393..ca8734b30b2 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/use-multiple-conditional-ternary-operators.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/use-multiple-conditional-ternary-operators.md
@@ -37,7 +37,7 @@ function findGreaterOrEqual(a, b) {
 }
 ```
 
-It is considered best practice to format multiple conditional operators such that each condition is on a separate line, as shown above. Using multiple conditional operators without proper indentation may make your code hard to read. For example:
+It is considered best practice to format multiple conditional operators such that each condition is on a separate line, as shown above. Using multiple conditional operators without proper indentation may make your code hard to read. 예:
 
 ```js
 function findGreaterOrEqual(a, b) {
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function.md
index bb0b4b00926..8b7a39b1f31 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/use-the-parseint-function.md
@@ -9,7 +9,7 @@ dashedName: use-the-parseint-function
 
 # --description--
 
-The `parseInt()` function parses a string and returns an integer. Here's an example:
+The `parseInt()` function parses a string and returns an integer. 여기 예시가 있습니다:
 
 ```js
 const a = parseInt("007");
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/word-blanks.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/word-blanks.md
index 0f519ae9a5d..63638db6ec7 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/word-blanks.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/basic-javascript/word-blanks.md
@@ -17,7 +17,7 @@ Consider this sentence:
 It was really ____, and we ____ ourselves ____.
 ```
 
-This sentence has three missing pieces- an adjective, a verb and an adverb, and we can add words of our choice to complete it. We can then assign the completed sentence to a variable as follows:
+이 문장은 형용사, 동사, 부사의 3가지가 빈칸으로 되어 있어서, 우리는 좋아하는 단어를 넣어 문장을 완성시킬 수 있습니다. 그리고 우리는 다음과 같이 완성한 문장을 변수에 할당할 수 있습니다:
 
 ```js
 const sentence = "It was really " + "hot" + ", and we " + "laughed" + " ourselves " + "silly" + ".";
@@ -25,21 +25,21 @@ const sentence = "It was really " + "hot" + ", and we " + "laughed" + " ourselve
 
 # --instructions--
 
-In this challenge, we provide you with a noun, a verb, an adjective and an adverb. You need to form a complete sentence using words of your choice, along with the words we provide.
+이 도전에서, 우리는 명사, 동사, 형용사, 부사를 제시했습니다. 당신은 우리가 제시한 단어들 속에서, 직접 선택한 단어를 사용해서 문장을 완성할 필요가 있습니다.
 
-You will need to use the string concatenation operator `+` to build a new string, using the provided variables: `myNoun`, `myAdjective`, `myVerb`, and `myAdverb`. You will then assign the formed string to the `wordBlanks` variable. You should not change the words assigned to the variables.
+당신은 제공된 변수 (`myNoun`, `myAdjective`, `myVerb`, and `myAdverb`) 를 사용해서 새로운 문자열을 작성하기 위해, 문자열 연결 연산자 `+`를 사용할 필요가 있습니다. 그리고 당신은 작성한 문자열을 `wordBlanks` 변수에 할당합니다. 변수에 할당되어 있는 단어를 변경해서는 안됩니다.
 
-You will also need to account for spaces in your string, so that the final sentence has spaces between all the words. The result should be a complete sentence.
+당신은 문자열 안의 공백에도 주의할 필요가 있습니다. 최종 문장에서는 모든 단어 사이에 공백을 포함하도록 합니다. 결과는 완전한 문장이 되어야 합니다.
 
 # --hints--
 
-`wordBlanks` should be a string.
+`wordBlanks`은 문자열이어야 합니다.
 
 ```js
 assert(typeof wordBlanks === 'string');
 ```
 
-You should not change the values assigned to `myNoun`, `myVerb`, `myAdjective` or `myAdverb`.
+당신은 `myNoun`, `myVerb`, `myAdjective` or `myAdverb`에 할당된 값을 변화시키면 안됩니다.
 
 ```js
 assert(
@@ -50,7 +50,7 @@ assert(
 );
 ```
 
-You should not directly use the values `dog`, `ran`, `big`, or `quickly` to create `wordBlanks`.
+`wordBlanks`을 작성하기 위해서 `dog`, `ran`, `big`, 또는 `quickly`의 값들을 직접적으로 사용해서는 안됩니다.
 
 ```js
 const newCode = removeAssignments(code);
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/compare-scopes-of-the-var-and-let-keywords.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/compare-scopes-of-the-var-and-let-keywords.md
index 2a8bde1fca8..f2fcef3fbbe 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/compare-scopes-of-the-var-and-let-keywords.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/compare-scopes-of-the-var-and-let-keywords.md
@@ -127,7 +127,7 @@ function checkScope() {
     let i = 'block scope';
     console.log('Block scope i is: ', i);
   }
- 
+
   console.log('Function scope i is: ', i);
   return i;
 }
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/complete-a-promise-with-resolve-and-reject.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/complete-a-promise-with-resolve-and-reject.md
index 83fb671b57c..aea3b4dd18e 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/complete-a-promise-with-resolve-and-reject.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/complete-a-promise-with-resolve-and-reject.md
@@ -52,7 +52,7 @@ assert(
 const makeServerRequest = new Promise((resolve, reject) => {
   // responseFromServer represents a response from a server
   let responseFromServer;
-    
+
   if(responseFromServer) {
     // Change this line
   } else {  
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/handle-a-fulfilled-promise-with-then.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/handle-a-fulfilled-promise-with-then.md
index d95b8d962dc..8ce7f00b693 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/handle-a-fulfilled-promise-with-then.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/handle-a-fulfilled-promise-with-then.md
@@ -18,7 +18,7 @@ The `then` method schedules callback functions for the eventual completion of a
 
 ```js
 myPromise.then(result => {
-  
+
 });
 ```
 
@@ -69,7 +69,7 @@ const resultIsParameter = /\.then\((function\(result\){|result|\(result\)=>)/.te
 const makeServerRequest = new Promise((resolve, reject) => {
   // responseFromServer is set to true to represent a successful response from a server
   let responseFromServer = true;
-    
+
   if(responseFromServer) {
     resolve("We got the data");
   } else {  
@@ -84,7 +84,7 @@ const makeServerRequest = new Promise((resolve, reject) => {
 const makeServerRequest = new Promise((resolve, reject) => {
   // responseFromServer is set to true to represent a successful response from a server
   let responseFromServer = true;
-    
+
   if(responseFromServer) {
     resolve("We got the data");
   } else {  
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/handle-a-rejected-promise-with-catch.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/handle-a-rejected-promise-with-catch.md
index a0ac218b643..9cf7ab11460 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/handle-a-rejected-promise-with-catch.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/handle-a-rejected-promise-with-catch.md
@@ -12,7 +12,7 @@ dashedName: handle-a-rejected-promise-with-catch
 
 ```js
 myPromise.catch(error => {
-  
+
 });
 ```
 
@@ -63,7 +63,7 @@ const errorIsParameter = /\.catch\((function\(error\){|error|\(error\)=>)/.test(
 const makeServerRequest = new Promise((resolve, reject) => {
   // responseFromServer is set to false to represent an unsuccessful response from a server
   let responseFromServer = false;
-    
+
   if(responseFromServer) {
     resolve("We got the data");
   } else {  
@@ -82,7 +82,7 @@ makeServerRequest.then(result => {
 const makeServerRequest = new Promise((resolve, reject) => {
   // responseFromServer is set to false to represent an unsuccessful response from a server
   let responseFromServer = false;
-    
+
   if(responseFromServer) {
     resolve("We got the data");
   } else {  
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/import-a-default-export.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/import-a-default-export.md
index 115ad02bd70..d8a0a3d465e 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/import-a-default-export.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/import-a-default-export.md
@@ -33,7 +33,7 @@ assert(code.match(/import\s+subtract\s+from\s+('|")\.\/math_functions\.js\1/g));
 ## --seed-contents--
 
 ```js
-  
+
 // Only change code above this line
 
 subtract(7,4);
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/reuse-javascript-code-using-import.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/reuse-javascript-code-using-import.md
index 1a21ddbb05a..ff3449dd2f8 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/reuse-javascript-code-using-import.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/reuse-javascript-code-using-import.md
@@ -53,7 +53,7 @@ assert(
 ## --seed-contents--
 
 ```js
-  
+
 // Only change code above this line
 
 uppercaseString("hello");
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-nested-objects.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-nested-objects.md
index 3dcbfef5d5f..7351036c00a 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-nested-objects.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-nested-objects.md
@@ -86,7 +86,7 @@ const LOCAL_FORECAST = {
 };
 
 // Only change code below this line
-  
+
 const lowToday = LOCAL_FORECAST.today.low;
 const highToday = LOCAL_FORECAST.today.high;
 
@@ -101,6 +101,6 @@ const LOCAL_FORECAST = {
   today: { low: 64, high: 77 },
   tomorrow: { low: 68, high: 80 }
 };
- 
+
 const { today: { low: lowToday, high: highToday }} = LOCAL_FORECAST;
 ```
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-objects.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-objects.md
index e14f1624a63..a4d5d900732 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-objects.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-objects.md
@@ -77,7 +77,7 @@ const HIGH_TEMPERATURES = {
 };
 
 // Only change code below this line
-  
+
 const highToday = HIGH_TEMPERATURES.today;
 const highTomorrow = HIGH_TEMPERATURES.tomorrow; 
 
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-getters-and-setters-to-control-access-to-an-object.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-getters-and-setters-to-control-access-to-an-object.md
index 3832ef4856f..2cbf3190468 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-getters-and-setters-to-control-access-to-an-object.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-getters-and-setters-to-control-access-to-an-object.md
@@ -14,7 +14,7 @@ These are classically called <dfn>getters</dfn> and <dfn>setters</dfn>.
 
 Getter functions are meant to simply return (get) the value of an object's private variable to the user without the user directly accessing the private variable.
 
-Setter functions are meant to modify (set) the value of an object's private variable based on the value passed into the setter function. This change could involve calculations, or even overwriting the previous value completely.  
+Setter functions are meant to modify (set) the value of an object's private variable based on the value passed into the setter function. This change could involve calculations, or even overwriting the previous value completely.
 
 ```js
 class Book {
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-the-spread-operator-to-evaluate-arrays-in-place.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-the-spread-operator-to-evaluate-arrays-in-place.md
index a1459ca284e..164b000a977 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-the-spread-operator-to-evaluate-arrays-in-place.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/es6/use-the-spread-operator-to-evaluate-arrays-in-place.md
@@ -28,7 +28,7 @@ const maximus = Math.max(...arr);
 
 `maximus` would have a value of `89`.
 
-`...arr` returns an unpacked array. In other words, it spreads the array. However, the spread operator only works in-place, like in an argument to a function or in an array literal. For example:
+`...arr` returns an unpacked array. In other words, it spreads the array. However, the spread operator only works in-place, like in an argument to a function or in an array literal. 예시:
 
 ```js
 const spreaded = [...arr];
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/learn-about-functional-programming.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/learn-about-functional-programming.md
index 3c37f658006..c96910a4833 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/learn-about-functional-programming.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/learn-about-functional-programming.md
@@ -73,7 +73,7 @@ const prepareTea = () => 'greenTea';
 
 const getTea = (numOfCups) => {
   const teaCups = [];
-  
+
   for(let cups = 1; cups <= numOfCups; cups += 1) {
     const teaCup = prepareTea();
     teaCups.push(teaCup);
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/refactor-global-variables-out-of-functions.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/refactor-global-variables-out-of-functions.md
index d9e11239803..daca0e21d5e 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/refactor-global-variables-out-of-functions.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/refactor-global-variables-out-of-functions.md
@@ -95,7 +95,7 @@ function add(bookName) {
 
   bookList.push(bookName);
   return bookList;
-  
+
   // Change code above this line
 }
 
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/use-the-map-method-to-extract-data-from-an-array.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/use-the-map-method-to-extract-data-from-an-array.md
index d4eeaee7672..a256fe48b94 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/use-the-map-method-to-extract-data-from-an-array.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/use-the-map-method-to-extract-data-from-an-array.md
@@ -33,7 +33,7 @@ const names = users.map(user => user.name);
 console.log(names);
 ```
 
-The console would display the value ` [ 'John', 'Amy', 'camperCat' ]`.
+The console would display the value `[ 'John', 'Amy', 'camperCat' ]`.
 
 # --instructions--
 
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/use-the-some-method-to-check-that-any-elements-in-an-array-meet-a-criteria.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/use-the-some-method-to-check-that-any-elements-in-an-array-meet-a-criteria.md
index 9e949a9b4b0..aa6b48e0bcd 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/use-the-some-method-to-check-that-any-elements-in-an-array-meet-a-criteria.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/functional-programming/use-the-some-method-to-check-that-any-elements-in-an-array-meet-a-criteria.md
@@ -24,7 +24,7 @@ The `some` method would return `true`.
 
 # --instructions--
 
-Use the `some` method inside the `checkPositive` function to check if any element in `arr` is positive. The function should return a Boolean value.
+Use the `some` method inside the `checkPositive` function to check if any element in `arr` is positive. 이 함수는 불리언(boolean) 값을 반환해야 합니다.
 
 # --hints--
 
@@ -40,7 +40,7 @@ assert(code.match(/\.some/g));
 assert(checkPositive([1, 2, 3, -4, 5]));
 ```
 
-`checkPositive([1, 2, 3, 4, 5])` should return `true`.
+`checkPositive([1, 2, 3, 4, 5])`는 `true`를 반환해야 합니다.
 
 ```js
 assert(checkPositive([1, 2, 3, 4, 5]));
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/map-the-debris.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/map-the-debris.md
index c347921bee1..c725795e943 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/map-the-debris.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/map-the-debris.md
@@ -10,9 +10,7 @@ dashedName: map-the-debris
 
 According to Kepler's Third Law, the orbital period $T$ of two point masses orbiting each other in a circular or elliptic orbit is:
 
-$$
-T = 2 \pi \sqrt{\frac{a^{3}}{\mu}}
-$$
+$$ T = 2 \pi \sqrt{\frac{a^{3}}{\mu}} $$
 
 - $a$ is the orbit's semi-major axis
 - $μ = GM$ is the standard gravitational parameter
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/roman-numeral-converter.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/roman-numeral-converter.md
index 64350154c03..a771018e180 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/roman-numeral-converter.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/roman-numeral-converter.md
@@ -11,7 +11,7 @@ dashedName: roman-numeral-converter
 Convert the given number into a roman numeral.
 
 | Roman numerals | Arabic numerals |
-|----------------|-----------------|
+| -------------- | --------------- |
 | M              | 1000            |
 | CM             | 900             |
 | D              | 500             |
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-closure-to-protect-properties-within-an-object-from-being-modified-externally.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-closure-to-protect-properties-within-an-object-from-being-modified-externally.md
index db936ea17d7..8441ee648aa 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-closure-to-protect-properties-within-an-object-from-being-modified-externally.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/object-oriented-programming/use-closure-to-protect-properties-within-an-object-from-being-modified-externally.md
@@ -1,8 +1,7 @@
 ---
 id: 587d7db2367417b2b2512b8a
 title: >-
-  Use Closure to Protect Properties Within an Object from Being Modified
-  Externally
+  Use Closure to Protect Properties Within an Object from Being Modified Externally
 challengeType: 1
 forumTopicId: 18234
 dashedName: >-
diff --git a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/regular-expressions/extract-matches.md b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/regular-expressions/extract-matches.md
index 887f6e36293..76ce1c896b6 100644
--- a/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/regular-expressions/extract-matches.md
+++ b/curriculum/challenges/korean/02-javascript-algorithms-and-data-structures/regular-expressions/extract-matches.md
@@ -12,7 +12,7 @@ So far, you have only been checking if a pattern exists or not within a string.
 
 To use the `.match()` method, apply the method on a string and pass in the regex inside the parentheses.
 
-Here's an example:
+여기 예시가 있습니다.
 
 ```js
 "Hello, World!".match(/Hello/);
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/add-font-awesome-icons-to-all-of-our-buttons.md b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/add-font-awesome-icons-to-all-of-our-buttons.md
index 211f3090c45..04a78c3d46f 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/add-font-awesome-icons-to-all-of-our-buttons.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/add-font-awesome-icons-to-all-of-our-buttons.md
@@ -4,14 +4,15 @@ title: Add Font Awesome Icons to all of our Buttons
 challengeType: 0
 forumTopicId: 16637
 required:
-  - link: 'https://use.fontawesome.com/releases/v5.8.1/css/all.css'
+  - 
+    link: 'https://use.fontawesome.com/releases/v5.8.1/css/all.css'
     raw: true
 dashedName: add-font-awesome-icons-to-all-of-our-buttons
 ---
 
 # --description--
 
-Font Awesome is a convenient library of icons. These icons can be web fonts or vector graphics. These icons are treated just like fonts. You can specify their size using pixels, and they will assume the font size of their parent HTML elements.
+Font Awesome is a convenient library of icons. These icons can be web fonts or vector graphics. 아이콘들은 폰트처럼 다룰 수 있습니다. 아이콘 크기를 픽셀로 직접 지정하거나, 부모 HTML 요소의 글꼴 크기와 연계해 지정할 수 있습니다.
 
 # --instructions--
 
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/add-font-awesome-icons-to-our-buttons.md b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/add-font-awesome-icons-to-our-buttons.md
index 12a425b9c2d..dd320a1749d 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/add-font-awesome-icons-to-our-buttons.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/add-font-awesome-icons-to-our-buttons.md
@@ -4,7 +4,8 @@ title: Add Font Awesome Icons to our Buttons
 challengeType: 0
 forumTopicId: 16638
 required:
-  - link: 'https://use.fontawesome.com/releases/v5.8.1/css/all.css'
+  - 
+    link: 'https://use.fontawesome.com/releases/v5.8.1/css/all.css'
     raw: true
 dashedName: add-font-awesome-icons-to-our-buttons
 ---
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/line-up-form-elements-responsively-with-bootstrap.md b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/line-up-form-elements-responsively-with-bootstrap.md
index f553498c464..d80f8eccd60 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/line-up-form-elements-responsively-with-bootstrap.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/line-up-form-elements-responsively-with-bootstrap.md
@@ -4,7 +4,8 @@ title: Line up Form Elements Responsively with Bootstrap
 challengeType: 0
 forumTopicId: 18225
 required:
-  - link: >-
+  - 
+    link: >-
       https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.css
     raw: true
 dashedName: line-up-form-elements-responsively-with-bootstrap
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/responsively-style-checkboxes.md b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/responsively-style-checkboxes.md
index b51a2425922..df608fa64ba 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/responsively-style-checkboxes.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/responsively-style-checkboxes.md
@@ -4,7 +4,8 @@ title: Responsively Style Checkboxes
 challengeType: 0
 forumTopicId: 18269
 required:
-  - link: >-
+  - 
+    link: >-
       https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.css
     raw: true
 dashedName: responsively-style-checkboxes
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/responsively-style-radio-buttons.md b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/responsively-style-radio-buttons.md
index 6d6d33e3242..12121798df0 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/responsively-style-radio-buttons.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/responsively-style-radio-buttons.md
@@ -4,7 +4,8 @@ title: Responsively Style Radio Buttons
 challengeType: 0
 forumTopicId: 18270
 required:
-  - link: >-
+  - 
+    link: >-
       https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.css
     raw: true
 dashedName: responsively-style-radio-buttons
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/style-text-inputs-as-form-controls.md b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/style-text-inputs-as-form-controls.md
index 70d3ea34cf8..b93cbab1001 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/style-text-inputs-as-form-controls.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/style-text-inputs-as-form-controls.md
@@ -4,7 +4,8 @@ title: Style Text Inputs as Form Controls
 challengeType: 0
 forumTopicId: 18312
 required:
-  - link: >-
+  - 
+    link: >-
       https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.2.0/css/font-awesome.css
     raw: true
 dashedName: style-text-inputs-as-form-controls
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/use-the-bootstrap-grid-to-put-elements-side-by-side.md b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/use-the-bootstrap-grid-to-put-elements-side-by-side.md
index 323e0f25990..e417f83200e 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/use-the-bootstrap-grid-to-put-elements-side-by-side.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/use-the-bootstrap-grid-to-put-elements-side-by-side.md
@@ -170,7 +170,7 @@ assert(
       <button class="btn btn-block btn-danger">Delete</button>
     </div>
   </div>
-  
+
   <p>Things cats love:</p>
   <ul>
     <li>cat nip</li>
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/warn-your-users-of-a-dangerous-action-with-btn-danger.md b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/warn-your-users-of-a-dangerous-action-with-btn-danger.md
index d64ff4afb74..9df99a73ef4 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/warn-your-users-of-a-dangerous-action-with-btn-danger.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/bootstrap/warn-your-users-of-a-dangerous-action-with-btn-danger.md
@@ -8,11 +8,11 @@ dashedName: warn-your-users-of-a-dangerous-action-with-btn-danger
 
 # --description--
 
-Bootstrap comes with several pre-defined colors for buttons. The `btn-danger` class is the button color you'll use to notify users that the button performs a destructive action, such as deleting a cat photo.
+부트스트랩에는 버튼을 위한 여러 사전에 정의된 색상들이 포함되어 있습니다. The `btn-danger` class is the button color you'll use to notify users that the button performs a destructive action, such as deleting a cat photo.
 
 Create a button with the text `Delete` and give it the class `btn-danger`.
 
-Note that these buttons still need the `btn` and `btn-block` classes.
+버튼들은 여전히 `btn`와 `btn-block` 클래스들이 있어야 합니다.
 
 # --hints--
 
@@ -34,7 +34,7 @@ Your new button should have the class `btn-danger`.
 assert($('button').hasClass('btn-danger'));
 ```
 
-All of your `button` elements should have closing tags.
+모든 `button` 요소들에는 닫는 태그가 있어야 합니다.
 
 ```js
 assert(
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/front-end-development-libraries-projects/build-a-javascript-calculator.md b/curriculum/challenges/korean/03-front-end-development-libraries/front-end-development-libraries-projects/build-a-javascript-calculator.md
index ceb41c62495..e496902366e 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/front-end-development-libraries-projects/build-a-javascript-calculator.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/front-end-development-libraries-projects/build-a-javascript-calculator.md
@@ -47,7 +47,7 @@ You can use any mix of HTML, JavaScript, CSS, Bootstrap, SASS, React, Redux, and
 
 **Note On Calculator Logic:** It should be noted that there are two main schools of thought on calculator input logic: <dfn>immediate execution logic</dfn> and <dfn>formula logic</dfn>. Our example utilizes formula logic and observes order of operation precedence, immediate execution does not. Either is acceptable, but please note that depending on which you choose, your calculator may yield different results than ours for certain equations (see below example). As long as your math can be verified by another production calculator, please do not consider this a bug.
 
-**EXAMPLE:** `3 + 5 x 6 - 2 / 4 =`  
+**EXAMPLE:** `3 + 5 x 6 - 2 / 4 =`
 
 -   **Immediate Execution Logic:** `11.5`
 -   **Formula/Expression Logic:** `32.5`
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/change-the-css-of-an-element-using-jquery.md b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/change-the-css-of-an-element-using-jquery.md
index aa09b454b92..1e999e8ba1b 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/change-the-css-of-an-element-using-jquery.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/change-the-css-of-an-element-using-jquery.md
@@ -4,7 +4,8 @@ title: Change the CSS of an Element Using jQuery
 challengeType: 6
 forumTopicId: 16776
 required:
-  - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
+  - 
+    link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 dashedName: change-the-css-of-an-element-using-jquery
 ---
 
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/delete-your-jquery-functions.md b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/delete-your-jquery-functions.md
index e5d188bff7b..331b2259900 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/delete-your-jquery-functions.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/delete-your-jquery-functions.md
@@ -4,7 +4,8 @@ title: Delete Your jQuery Functions
 challengeType: 6
 forumTopicId: 17561
 required:
-  - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
+  - 
+    link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 dashedName: delete-your-jquery-functions
 ---
 
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/remove-classes-from-an-element-with-jquery.md b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/remove-classes-from-an-element-with-jquery.md
index 7df3b8052fd..a63b5882c7d 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/remove-classes-from-an-element-with-jquery.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/remove-classes-from-an-element-with-jquery.md
@@ -4,7 +4,8 @@ title: Remove Classes from an Element with jQuery
 challengeType: 6
 forumTopicId: 18264
 required:
-  - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
+  - 
+    link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 dashedName: remove-classes-from-an-element-with-jquery
 ---
 
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-a-specific-child-of-an-element-using-jquery.md b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-a-specific-child-of-an-element-using-jquery.md
index 0e082e179f2..12934f268bf 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-a-specific-child-of-an-element-using-jquery.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-a-specific-child-of-an-element-using-jquery.md
@@ -4,7 +4,8 @@ title: Target a Specific Child of an Element Using jQuery
 challengeType: 6
 forumTopicId: 18315
 required:
-  - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
+  - 
+    link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 dashedName: target-a-specific-child-of-an-element-using-jquery
 ---
 
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-elements-by-class-using-jquery.md b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-elements-by-class-using-jquery.md
index 525a6106cf4..dfd7a970d32 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-elements-by-class-using-jquery.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-elements-by-class-using-jquery.md
@@ -4,7 +4,8 @@ title: Target Elements by Class Using jQuery
 challengeType: 6
 forumTopicId: 18316
 required:
-  - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
+  - 
+    link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 dashedName: target-elements-by-class-using-jquery
 ---
 
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-elements-by-id-using-jquery.md b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-elements-by-id-using-jquery.md
index e63f60b4e5e..085c1552a02 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-elements-by-id-using-jquery.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-elements-by-id-using-jquery.md
@@ -4,7 +4,8 @@ title: Target Elements by id Using jQuery
 challengeType: 6
 forumTopicId: 18317
 required:
-  - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
+  - 
+    link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 dashedName: target-elements-by-id-using-jquery
 ---
 
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-even-elements-using-jquery.md b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-even-elements-using-jquery.md
index d89318eb3e7..a6c8b20ddd9 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-even-elements-using-jquery.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-even-elements-using-jquery.md
@@ -4,7 +4,8 @@ title: Target Even Elements Using jQuery
 challengeType: 6
 forumTopicId: 18318
 required:
-  - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
+  - 
+    link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 dashedName: target-even-elements-using-jquery
 ---
 
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-html-elements-with-selectors-using-jquery.md b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-html-elements-with-selectors-using-jquery.md
index 7a85bd8d858..e29d70535e9 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-html-elements-with-selectors-using-jquery.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-html-elements-with-selectors-using-jquery.md
@@ -4,7 +4,8 @@ title: Target HTML Elements with Selectors Using jQuery
 challengeType: 6
 forumTopicId: 18319
 required:
-  - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
+  - 
+    link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 dashedName: target-html-elements-with-selectors-using-jquery
 ---
 
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-the-same-element-with-multiple-jquery-selectors.md b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-the-same-element-with-multiple-jquery-selectors.md
index 65e25dbc547..3ab02d80574 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-the-same-element-with-multiple-jquery-selectors.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/target-the-same-element-with-multiple-jquery-selectors.md
@@ -4,7 +4,8 @@ title: Target the Same Element with Multiple jQuery Selectors
 challengeType: 6
 forumTopicId: 18322
 required:
-  - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
+  - 
+    link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 dashedName: target-the-same-element-with-multiple-jquery-selectors
 ---
 
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/use-jquery-to-modify-the-entire-page.md b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/use-jquery-to-modify-the-entire-page.md
index 4123f59226e..540607dfe71 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/jquery/use-jquery-to-modify-the-entire-page.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/jquery/use-jquery-to-modify-the-entire-page.md
@@ -4,7 +4,8 @@ title: Use jQuery to Modify the Entire Page
 challengeType: 6
 forumTopicId: 18361
 required:
-  - link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
+  - 
+    link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
 dashedName: use-jquery-to-modify-the-entire-page
 ---
 
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/react/give-sibling-elements-a-unique-key-attribute.md b/curriculum/challenges/korean/03-front-end-development-libraries/react/give-sibling-elements-a-unique-key-attribute.md
index 23751b823b7..49bf695b428 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/react/give-sibling-elements-a-unique-key-attribute.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/react/give-sibling-elements-a-unique-key-attribute.md
@@ -8,7 +8,7 @@ dashedName: give-sibling-elements-a-unique-key-attribute
 
 # --description--
 
-The last challenge showed how the `map` method is used to dynamically render a number of elements based on user input. However, there was an important piece missing from that example. When you create an array of elements, each one needs a `key` attribute set to a unique value. React uses these keys to keep track of which items are added, changed, or removed. This helps make the re-rendering process more efficient when the list is modified in any way.  
+The last challenge showed how the `map` method is used to dynamically render a number of elements based on user input. However, there was an important piece missing from that example. When you create an array of elements, each one needs a `key` attribute set to a unique value. React uses these keys to keep track of which items are added, changed, or removed. This helps make the re-rendering process more efficient when the list is modified in any way.
 
 **Note:** Keys only need to be unique between sibling elements, they don't need to be globally unique in your application.
 
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/react/pass-an-array-as-props.md b/curriculum/challenges/korean/03-front-end-development-libraries/react/pass-an-array-as-props.md
index f9c089485a2..c0a065c9f6c 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/react/pass-an-array-as-props.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/react/pass-an-array-as-props.md
@@ -16,11 +16,11 @@ The last challenge demonstrated how to pass information from a parent component
 </ParentComponent>
 ```
 
-The child component then has access to the array property `colors`. Array methods such as `join()` can be used when accessing the property. 
+The child component then has access to the array property `colors`. Array methods such as `join()` can be used when accessing the property.
 
 ```jsx
 const ChildComponent = (props) => <p>{props.colors.join(', ')}</p>
-``` 
+```
 
 This will join all `colors` array items into a comma separated string and produce: `<p>green, blue, red</p>`. Later, we will learn about other common methods to render arrays of data in React.
 
diff --git a/curriculum/challenges/korean/03-front-end-development-libraries/redux/copy-an-object-with-object.assign.md b/curriculum/challenges/korean/03-front-end-development-libraries/redux/copy-an-object-with-object.assign.md
index 9c004ef012a..f807cf900c4 100644
--- a/curriculum/challenges/korean/03-front-end-development-libraries/redux/copy-an-object-with-object.assign.md
+++ b/curriculum/challenges/korean/03-front-end-development-libraries/redux/copy-an-object-with-object.assign.md
@@ -8,7 +8,7 @@ dashedName: copy-an-object-with-object-assign
 
 # --description--
 
-The last several challenges worked with arrays, but there are ways to help enforce state immutability when state is an `object`, too. A useful tool for handling objects is the `Object.assign()` utility. `Object.assign()` takes a target object and source objects and maps properties from the source objects to the target object. Any matching properties are overwritten by properties in the source objects. This behavior is commonly used to make shallow copies of objects by passing an empty object as the first argument followed by the object(s) you want to copy. Here's an example:
+The last several challenges worked with arrays, but there are ways to help enforce state immutability when state is an `object`, too. A useful tool for handling objects is the `Object.assign()` utility. `Object.assign()` takes a target object and source objects and maps properties from the source objects to the target object. Any matching properties are overwritten by properties in the source objects. This behavior is commonly used to make shallow copies of objects by passing an empty object as the first argument followed by the object(s) you want to copy. 여기 예시가 있습니다:
 
 ```js
 const newObject = Object.assign({}, obj1, obj2);
diff --git a/curriculum/challenges/korean/04-data-visualization/data-visualization-projects/visualize-data-with-a-choropleth-map.md b/curriculum/challenges/korean/04-data-visualization/data-visualization-projects/visualize-data-with-a-choropleth-map.md
index 4cf448fbab0..1770327c9ca 100644
--- a/curriculum/challenges/korean/04-data-visualization/data-visualization-projects/visualize-data-with-a-choropleth-map.md
+++ b/curriculum/challenges/korean/04-data-visualization/data-visualization-projects/visualize-data-with-a-choropleth-map.md
@@ -36,7 +36,7 @@ You can use HTML, JavaScript, CSS, and the D3 svg-based visualization library. R
 
 **User Story #11:** My tooltip should have a `data-education` property that corresponds to the `data-education` of the active area.
 
-Here are the datasets you will need to complete this project:  
+Here are the datasets you will need to complete this project:
 
 -   **US Education Data:**`https://cdn.freecodecamp.org/testable-projects-fcc/data/choropleth_map/for_user_education.json`
 -   **US County Data:**`https://cdn.freecodecamp.org/testable-projects-fcc/data/choropleth_map/counties.json`
diff --git a/curriculum/challenges/korean/04-data-visualization/data-visualization-projects/visualize-data-with-a-treemap-diagram.md b/curriculum/challenges/korean/04-data-visualization/data-visualization-projects/visualize-data-with-a-treemap-diagram.md
index b72ac9fafe2..8f36b427544 100644
--- a/curriculum/challenges/korean/04-data-visualization/data-visualization-projects/visualize-data-with-a-treemap-diagram.md
+++ b/curriculum/challenges/korean/04-data-visualization/data-visualization-projects/visualize-data-with-a-treemap-diagram.md
@@ -36,7 +36,7 @@ You can use HTML, JavaScript, CSS, and the D3 svg-based visualization library. T
 
 **User Story #11:** My tooltip should have a `data-value` property that corresponds to the `data-value` of the active area.
 
-For this project you can use any of the following datasets:  
+For this project you can use any of the following datasets:
 
 -   **Kickstarter Pledges:** `https://cdn.freecodecamp.org/testable-projects-fcc/data/tree_map/kickstarter-funding-data.json`
 -   **Movie Sales:** `https://cdn.freecodecamp.org/testable-projects-fcc/data/tree_map/movie-data.json`
diff --git a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.md b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.md
index e16937cbff9..82fbd2748e0 100644
--- a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.md
+++ b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-a-tooltip-to-a-d3-element.md
@@ -160,7 +160,7 @@ assert($('title').eq(8).text() == '9');
        .attr("class", "bar")
        .append("title")
        .text((d) => d)
-       
+
 
     svg.selectAll("text")
        .data(dataset)
diff --git a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.md b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.md
index e21e7e08f69..4d7fa9ef121 100644
--- a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.md
+++ b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-axes-to-a-visualization.md
@@ -181,9 +181,9 @@ assert(code.match(/\.call\(\s*yAxis\s*\)/g));
        .attr("y", (d) => yScale(d[1]))
 
     const xAxis = d3.axisBottom(xScale);
-    
+
     const yAxis = d3.axisLeft(yScale);
-    
+
 
     svg.append("g")
        .attr("transform", "translate(0," + (h - padding) + ")")
diff --git a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.md b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.md
index ea44782e9cd..7b02972ca7f 100644
--- a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.md
+++ b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-document-elements-with-d3.md
@@ -10,7 +10,7 @@ dashedName: add-document-elements-with-d3
 
 D3 has several methods that let you add and change elements in your document.
 
-The `select()` method selects one element from the document. It takes an argument for the name of the element you want and returns an HTML node for the first element in the document that matches the name. Here's an example:
+The `select()` method selects one element from the document. It takes an argument for the name of the element you want and returns an HTML node for the first element in the document that matches the name. 여기 예시가 있습니다.
 
 ```js
 const anchor = d3.select("a");
diff --git a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.md b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.md
index 9db06dbce87..cabb8ab44a8 100644
--- a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.md
+++ b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/add-labels-to-scatter-plot-circles.md
@@ -218,7 +218,7 @@ assert(
        .attr("x", (d) => d[0] + 5)
        .attr("y", (d) => h - d[1])
        .text((d) => (d[0] + ", " + d[1]))
-       
+
   </script>
 </body>
 ```
diff --git a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.md b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.md
index 8e2005e381f..432846bc761 100644
--- a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.md
+++ b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/change-styles-based-on-data.md
@@ -8,8 +8,7 @@ dashedName: change-styles-based-on-data
 
 # --description--
 
-D3 is about visualization and presentation of data. It's likely you'll want to change the styling of elements based on the data.
-For example, you may want to color a data point blue if it has a value less than 20, and red otherwise. You can use a callback function in the `style()` method and include the conditional logic. The callback function uses the `d` parameter to represent the data point:
+D3 is about visualization and presentation of data. It's likely you'll want to change the styling of elements based on the data. For example, you may want to color a data point blue if it has a value less than 20, and red otherwise. You can use a callback function in the `style()` method and include the conditional logic. The callback function uses the `d` parameter to represent the data point:
 
 ```js
 selection.style("color", (d) => {
diff --git a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.md b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.md
index 9112736602d..46b6e2613d1 100644
--- a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.md
+++ b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/change-the-presentation-of-a-bar-chart.md
@@ -114,7 +114,7 @@ assert(
     height: 100px;
     /* Add your code below this line */
 
-    
+
     /* Add your code above this line */
     display: inline-block;
     background-color: blue;
diff --git a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.md b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.md
index 3fa5116584f..bf482e672c9 100644
--- a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.md
+++ b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/set-a-domain-and-a-range-on-a-scale.md
@@ -14,7 +14,7 @@ Say a dataset has values ranging from 50 to 480. This is the input information f
 
 You want to map those points along the `x` axis on the SVG, between 10 units and 500 units. This is the output information, also known as the <dfn>range</dfn>.
 
-The `domain()` and `range()` methods set these values for the scale. Both methods take an array of at least two elements as an argument. Here's an example:
+The `domain()` and `range()` methods set these values for the scale. Both methods take an array of at least two elements as an argument. 여기 예시가 있습니다.
 
 ```js
 scale.domain([50, 480]);
diff --git a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.md b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.md
index 22964ba26fc..4c2df52a5e2 100644
--- a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.md
+++ b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/use-a-pre-defined-scale-to-place-elements.md
@@ -10,7 +10,7 @@ dashedName: use-a-pre-defined-scale-to-place-elements
 
 With the scales set up, it's time to map the scatter plot again. The scales are like processing functions that turn the `x` and `y` raw data into values that fit and render correctly on the SVG. They keep the data within the screen's plotting area.
 
-You set the coordinate attribute values for an SVG shape with the scaling function. This includes `x` and `y` attributes for `rect` or `text` elements, or `cx` and `cy` for `circles`. Here's an example:
+You set the coordinate attribute values for an SVG shape with the scaling function. This includes `x` and `y` attributes for `rect` or `text` elements, or `cx` and `cy` for `circles`. 여기 예시가 있습니다.
 
 ```js
 shape
diff --git a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.md b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.md
index 786b313b214..7736dd35ef9 100644
--- a/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.md
+++ b/curriculum/challenges/korean/04-data-visualization/data-visualization-with-d3/use-the-d3.max-and-d3.min-functions-to-find-minimum-and-maximum-values-in-a-dataset.md
@@ -1,8 +1,7 @@
 ---
 id: 587d7fac367417b2b2512bdc
 title: >-
-  Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a
-  Dataset
+  Use the d3.max and d3.min Functions to Find Minimum and Maximum Values in a Dataset
 challengeType: 6
 forumTopicId: 301496
 dashedName: >-
diff --git a/curriculum/challenges/korean/04-data-visualization/json-apis-and-ajax/post-data-with-the-javascript-xmlhttprequest-method.md b/curriculum/challenges/korean/04-data-visualization/json-apis-and-ajax/post-data-with-the-javascript-xmlhttprequest-method.md
index 75b231d9b16..71e1be99121 100644
--- a/curriculum/challenges/korean/04-data-visualization/json-apis-and-ajax/post-data-with-the-javascript-xmlhttprequest-method.md
+++ b/curriculum/challenges/korean/04-data-visualization/json-apis-and-ajax/post-data-with-the-javascript-xmlhttprequest-method.md
@@ -10,7 +10,7 @@ dashedName: post-data-with-the-javascript-xmlhttprequest-method
 
 In the previous examples, you received data from an external resource. You can also send data to an external resource, as long as that resource supports AJAX requests and you know the URL.
 
-JavaScript's `XMLHttpRequest` method is also used to post data to a server. Here's an example:
+JavaScript's `XMLHttpRequest` method is also used to post data to a server. 여기 예시가 있습니다.
 
 ```js
 const xhr = new XMLHttpRequest();
@@ -36,7 +36,7 @@ Finally, the `send` method sends the request with the `body` value. The `body` c
 
 # --instructions--
 
-Update the code so it makes a `POST` request to the API endpoint. Then type your name in the input field and click `Send Message`. Your AJAX function should replace `Reply from Server will be here.` with data from the server. Format the response to display your name appended with the text ` loves cats`.
+Update the code so it makes a `POST` request to the API endpoint. Then type your name in the input field and click `Send Message`. Your AJAX function should replace `Reply from Server will be here.` with data from the server. Format the response to display your name appended with the text `loves cats`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/exercise-tracker.md b/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/exercise-tracker.md
index c47f46125b6..56ddbdc4def 100644
--- a/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/exercise-tracker.md
+++ b/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/exercise-tracker.md
@@ -16,9 +16,9 @@ Build a full stack JavaScript app that is functionally similar to this: <a href=
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. Optionally, also submit a link to your project's source code in the GitHub Link field.
 
@@ -162,7 +162,7 @@ async(getUserInput) => {
 };
 ```
 
-You can `POST` to `/api/users/:_id/exercises` with form data `description`, `duration`, and optionally `date`. If no date is supplied, the current date will be used. 
+You can `POST` to `/api/users/:_id/exercises` with form data `description`, `duration`, and optionally `date`. If no date is supplied, the current date will be used.
 
 ```js
 async (getUserInput) => {
diff --git a/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/file-metadata-microservice.md b/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/file-metadata-microservice.md
index 2fd385b7ce2..dc47c463bb3 100644
--- a/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/file-metadata-microservice.md
+++ b/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/file-metadata-microservice.md
@@ -16,9 +16,9 @@ Build a full stack JavaScript app that is functionally similar to this: <a href=
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. Optionally, also submit a link to your project's source code in the GitHub Link field.
 
diff --git a/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/request-header-parser-microservice.md b/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/request-header-parser-microservice.md
index fdb87d75856..9fcfc56b3ef 100644
--- a/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/request-header-parser-microservice.md
+++ b/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/request-header-parser-microservice.md
@@ -16,9 +16,9 @@ Build a full stack JavaScript app that is functionally similar to this: <a href=
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. Optionally, also submit a link to your project's source code in the GitHub Link field.
 
diff --git a/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/timestamp-microservice.md b/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/timestamp-microservice.md
index 68938e90273..536ed76fd92 100644
--- a/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/timestamp-microservice.md
+++ b/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/timestamp-microservice.md
@@ -16,13 +16,13 @@ Build a full stack JavaScript app that is functionally similar to this: <a href=
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. Optionally, also submit a link to your project's source code in the GitHub Link field.
 
-**Note:** Time zones conversion is not a purpose of this project, so assume all sent valid dates will be parsed with `new Date()` as GMT dates. 
+**Note:** Time zones conversion is not a purpose of this project, so assume all sent valid dates will be parsed with `new Date()` as GMT dates.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/url-shortener-microservice.md b/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/url-shortener-microservice.md
index b350b025b02..58cf09e170e 100644
--- a/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/url-shortener-microservice.md
+++ b/curriculum/challenges/korean/05-back-end-development-and-apis/back-end-development-and-apis-projects/url-shortener-microservice.md
@@ -16,9 +16,9 @@ Build a full stack JavaScript app that is functionally similar to this: <a href=
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. Optionally, also submit a link to your project's source code in the GitHub Link field.
 
diff --git a/curriculum/challenges/korean/05-back-end-development-and-apis/basic-node-and-express/meet-the-node-console.md b/curriculum/challenges/korean/05-back-end-development-and-apis/basic-node-and-express/meet-the-node-console.md
index c3bb31b3df2..3d0fd252f7f 100644
--- a/curriculum/challenges/korean/05-back-end-development-and-apis/basic-node-and-express/meet-the-node-console.md
+++ b/curriculum/challenges/korean/05-back-end-development-and-apis/basic-node-and-express/meet-the-node-console.md
@@ -16,9 +16,9 @@ Working on these challenges will involve you writing your code using one of the
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field.
 
diff --git a/curriculum/challenges/korean/05-back-end-development-and-apis/basic-node-and-express/serve-static-assets.md b/curriculum/challenges/korean/05-back-end-development-and-apis/basic-node-and-express/serve-static-assets.md
index de7156cfc1b..0c5414a2ae4 100644
--- a/curriculum/challenges/korean/05-back-end-development-and-apis/basic-node-and-express/serve-static-assets.md
+++ b/curriculum/challenges/korean/05-back-end-development-and-apis/basic-node-and-express/serve-static-assets.md
@@ -40,7 +40,7 @@ Your app should serve asset files from the `/public` directory to the `/public`
   );
 ```
 
-Your app should not serve files from any other folders except from `/public` directory 
+Your app should not serve files from any other folders except from `/public` directory
 
 ```js
 (getUserInput) =>
diff --git a/curriculum/challenges/korean/05-back-end-development-and-apis/basic-node-and-express/use-body-parser-to-parse-post-requests.md b/curriculum/challenges/korean/05-back-end-development-and-apis/basic-node-and-express/use-body-parser-to-parse-post-requests.md
index 5d6ba3175d4..f3eb31ef9eb 100644
--- a/curriculum/challenges/korean/05-back-end-development-and-apis/basic-node-and-express/use-body-parser-to-parse-post-requests.md
+++ b/curriculum/challenges/korean/05-back-end-development-and-apis/basic-node-and-express/use-body-parser-to-parse-post-requests.md
@@ -28,7 +28,7 @@ As you can see, the body is encoded like the query string. This is the default f
 
 `body-parser` has already been installed and is in your project's `package.json` file. `require` it at the top of the `myApp.js` file and store it in a variable named `bodyParser`. The middleware to handle URL encoded data is returned by `bodyParser.urlencoded({extended: false})`. Pass the function returned by the previous method call to `app.use()`. As usual, the middleware must be mounted before all the routes that depend on it.
 
-**Note:** `extended` is a configuration option that tells `body-parser` which parsing needs to be used. When `extended=false` it uses the classic encoding `querystring` library. When `extended=true` it uses `qs` library for parsing. 
+**Note:** `extended` is a configuration option that tells `body-parser` which parsing needs to be used. When `extended=false` it uses the classic encoding `querystring` library. When `extended=true` it uses `qs` library for parsing.
 
 When using `extended=false`, values can be only strings or arrays. The object returned when using `querystring` does not prototypically inherit from the default JavaScript `Object`, which means functions like `hasOwnProperty`, `toString` will not be available. The extended version allows more data flexibility, but it is outmatched by JSON.
 
diff --git a/curriculum/challenges/korean/05-back-end-development-and-apis/managing-packages-with-npm/add-a-version-to-your-package.json.md b/curriculum/challenges/korean/05-back-end-development-and-apis/managing-packages-with-npm/add-a-version-to-your-package.json.md
index a5b3b8b2453..0f26fd708fd 100644
--- a/curriculum/challenges/korean/05-back-end-development-and-apis/managing-packages-with-npm/add-a-version-to-your-package.json.md
+++ b/curriculum/challenges/korean/05-back-end-development-and-apis/managing-packages-with-npm/add-a-version-to-your-package.json.md
@@ -8,7 +8,7 @@ dashedName: add-a-version-to-your-package-json
 
 # --description--
 
-A `version` is one of the required fields of your package.json file. This field describes the current version of your project. Here's an example:
+A `version` is one of the required fields of your package.json file. This field describes the current version of your project. 여기 예시가 있습니다:
 
 ```json
 "version": "1.2.0",
diff --git a/curriculum/challenges/korean/05-back-end-development-and-apis/managing-packages-with-npm/add-keywords-to-your-package.json.md b/curriculum/challenges/korean/05-back-end-development-and-apis/managing-packages-with-npm/add-keywords-to-your-package.json.md
index 33c9742e8bc..ba8b6190e2c 100644
--- a/curriculum/challenges/korean/05-back-end-development-and-apis/managing-packages-with-npm/add-keywords-to-your-package.json.md
+++ b/curriculum/challenges/korean/05-back-end-development-and-apis/managing-packages-with-npm/add-keywords-to-your-package.json.md
@@ -8,7 +8,7 @@ dashedName: add-keywords-to-your-package-json
 
 # --description--
 
-The `keywords` field is where you can describe your project using related keywords. Here's an example:
+The `keywords` field is where you can describe your project using related keywords. 여기 예시가 있습니다:
 
 ```json
 "keywords": [ "descriptive", "related", "words" ],
diff --git a/curriculum/challenges/korean/05-back-end-development-and-apis/managing-packages-with-npm/how-to-use-package.json-the-core-of-any-node.js-project-or-npm-package.md b/curriculum/challenges/korean/05-back-end-development-and-apis/managing-packages-with-npm/how-to-use-package.json-the-core-of-any-node.js-project-or-npm-package.md
index 0c763032f10..fa652d307de 100644
--- a/curriculum/challenges/korean/05-back-end-development-and-apis/managing-packages-with-npm/how-to-use-package.json-the-core-of-any-node.js-project-or-npm-package.md
+++ b/curriculum/challenges/korean/05-back-end-development-and-apis/managing-packages-with-npm/how-to-use-package.json-the-core-of-any-node.js-project-or-npm-package.md
@@ -16,11 +16,11 @@ Working on these challenges will involve you writing your code using one of the
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
-When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. 
+When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field.
 
 The `package.json` file is the center of any Node.js project or npm package. It stores information about your project, similar to how the `head` section of an HTML document describes the content of a webpage. It consists of a single JSON object where information is stored in key-value pairs. There are only two required fields; `name` and `version`, but it’s good practice to provide additional information about your project that could be useful to future users or maintainers.
 
diff --git a/curriculum/challenges/korean/05-back-end-development-and-apis/mongodb-and-mongoose/install-and-set-up-mongoose.md b/curriculum/challenges/korean/05-back-end-development-and-apis/mongodb-and-mongoose/install-and-set-up-mongoose.md
index acccf228e3c..d1b93336346 100644
--- a/curriculum/challenges/korean/05-back-end-development-and-apis/mongodb-and-mongoose/install-and-set-up-mongoose.md
+++ b/curriculum/challenges/korean/05-back-end-development-and-apis/mongodb-and-mongoose/install-and-set-up-mongoose.md
@@ -16,9 +16,9 @@ Working on these challenges will involve you writing your code using one of the
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field.
 
diff --git a/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/authentication-with-socket.io.md b/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/authentication-with-socket.io.md
index 2854c194770..0ef1beed771 100644
--- a/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/authentication-with-socket.io.md
+++ b/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/authentication-with-socket.io.md
@@ -39,7 +39,7 @@ Previously, when we configured the `session` middleware, we didn't explicitly se
 
 Be sure to add the `key` with the cookie name to the `session` middleware that matches the Socket.IO key. Also, add the `store` reference to the options, near where we set `saveUninitialized: true`. This is necessary to tell Socket.IO which session to relate to.
 
-<hr>
+<hr />
 
 Now, define the `success`, and `fail` callback functions:
 
diff --git a/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/how-to-put-a-profile-together.md b/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/how-to-put-a-profile-together.md
index 9e7906b5787..f698f521cbe 100644
--- a/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/how-to-put-a-profile-together.md
+++ b/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/how-to-put-a-profile-together.md
@@ -18,7 +18,7 @@ Then, go to your `profile.pug` view, and add the following line below the existi
 h2.center#welcome Welcome, #{username}!
 ```
 
-This creates an `h2` element with the class `center` and id `welcome` containing the text `Welcome, ` followed by the username.
+This creates an `h2` element with the class `center` and id `welcome` containing the text `Welcome,` followed by the username.
 
 Also, in `profile.pug`, add a link referring to the `/logout` route, which will host the logic to unauthenticate a user:
 
diff --git a/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md b/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
index 8be0ec04cd3..f5d76f3bbc1 100644
--- a/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
+++ b/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
@@ -17,7 +17,7 @@ passport.serializeUser(cb);
 passport.deserializeUser(cb);
 ```
 
-The callback function passed to `serializeUser` is called with two arguments: the full user object, and a callback used by passport. 
+The callback function passed to `serializeUser` is called with two arguments: the full user object, and a callback used by passport.
 
 The callback expects two arguments: An error, if any, and a unique key to identify the user that should be returned in the callback. You will use the user's `_id` in the object. This is guaranteed to be unique, as it is generated by MongoDB.
 
diff --git a/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/set-up-a-template-engine.md b/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/set-up-a-template-engine.md
index c0e910201de..e14beb131fc 100644
--- a/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/set-up-a-template-engine.md
+++ b/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/set-up-a-template-engine.md
@@ -16,9 +16,9 @@ Working on these challenges will involve you writing your code using one of the
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field.
 
diff --git a/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/use-a-template-engines-powers.md b/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/use-a-template-engines-powers.md
index 17ac6889af9..08b33ab6503 100644
--- a/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/use-a-template-engines-powers.md
+++ b/curriculum/challenges/korean/06-quality-assurance/advanced-node-and-express/use-a-template-engines-powers.md
@@ -14,8 +14,8 @@ In your Pug file, you're able to use a variable by referencing the variable name
 
 Pug is all about using whitespace and tabs to show nested elements and cutting down on the amount of code needed to make a beautiful site.
 
-Take the following Pug code for example: 
- 
+Take the following Pug code for example:
+
 ```pug
 head
   script(type='text/javascript').
diff --git a/curriculum/challenges/korean/06-quality-assurance/quality-assurance-and-testing-with-chai/learn-how-javascript-assertions-work.md b/curriculum/challenges/korean/06-quality-assurance/quality-assurance-and-testing-with-chai/learn-how-javascript-assertions-work.md
index 4bb448be7d7..710c1c089bd 100644
--- a/curriculum/challenges/korean/06-quality-assurance/quality-assurance-and-testing-with-chai/learn-how-javascript-assertions-work.md
+++ b/curriculum/challenges/korean/06-quality-assurance/quality-assurance-and-testing-with-chai/learn-how-javascript-assertions-work.md
@@ -16,9 +16,9 @@ Working on these challenges will involve you writing your code using one of the
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field.
 
diff --git a/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/american-british-translator.md b/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/american-british-translator.md
index 2d1aca5fcc0..ef14b99aa5d 100644
--- a/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/american-british-translator.md
+++ b/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/american-british-translator.md
@@ -16,9 +16,9 @@ Build a full stack JavaScript app that is functionally similar to this: <a href=
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. Optionally, also submit a link to your project's source code in the GitHub Link field.
 
diff --git a/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/issue-tracker.md b/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/issue-tracker.md
index 6ef58493f53..b049277a0a6 100644
--- a/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/issue-tracker.md
+++ b/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/issue-tracker.md
@@ -16,9 +16,9 @@ Build a full stack JavaScript app that is functionally similar to this: <a href=
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. Optionally, also submit a link to your project's source code in the GitHub Link field.
 
diff --git a/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/metric-imperial-converter.md b/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/metric-imperial-converter.md
index 146f88025fd..141390def52 100644
--- a/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/metric-imperial-converter.md
+++ b/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/metric-imperial-converter.md
@@ -16,9 +16,9 @@ Build a full stack JavaScript app that is functionally similar to this: <a href=
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. Optionally, also submit a link to your project's source code in the GitHub Link field.
 
diff --git a/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/personal-library.md b/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/personal-library.md
index 727c65bcf18..a6abf77e231 100644
--- a/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/personal-library.md
+++ b/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/personal-library.md
@@ -16,16 +16,15 @@ Build a full stack JavaScript app that is functionally similar to this: <a href=
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. Optionally, also submit a link to your project's source code in the GitHub Link field.
 
 # --instructions--
 
-1.  Add your MongoDB connection string to `.env` without quotes as `DB`
-    Example: `DB=mongodb://admin:pass@1234.mlab.com:1234/fccpersonallib`
+1.  Add your MongoDB connection string to `.env` without quotes as `DB` Example: `DB=mongodb://admin:pass@1234.mlab.com:1234/fccpersonallib`
 2.  In your `.env` file set `NODE_ENV` to `test`, without quotes
 3.  You need to create all routes within `routes/api.js`
 4.  You will create all functional tests in `tests/2_functional-tests.js`
diff --git a/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/sudoku-solver.md b/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/sudoku-solver.md
index c76424eb110..fce5f5592f1 100644
--- a/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/sudoku-solver.md
+++ b/curriculum/challenges/korean/06-quality-assurance/quality-assurance-projects/sudoku-solver.md
@@ -16,9 +16,9 @@ Build a full stack JavaScript app that is functionally similar to this: <a href=
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. Optionally, also submit a link to your project's source code in the GitHub Link field.
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655771d889132f9ccd341060.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655771d889132f9ccd341060.md
index 54064297cc5..6b0bc7d23b5 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655771d889132f9ccd341060.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655771d889132f9ccd341060.md
@@ -9,19 +9,18 @@ dashedName: step-15
 
 A graph is called a *weighted* graph when its edges are associated with weights, representing a distance, time or other quantitative value.
 
-In your case, these weights will be the distances between each node, or point in space.
-To represent a weighted graph you can modify your dictionary, using a list of tuples for each value.
+In your case, these weights will be the distances between each node, or point in space. To represent a weighted graph you can modify your dictionary, using a list of tuples for each value.
 
 The first element in the tuple will be the connected node, and the second element will be an integer number indicating the distance.
 
 Modify `my_graph["A"]` into a list of tuples, considering the following distances:
 
 | Edge | Weight |
-|------|--------|
-| A-B  |   3    |
-| B-C  |   4    |
-| C-D  |   7    |
-| D-A  |   1    |
+| ---- | ------ |
+| A-B  | 3      |
+| B-C  | 4      |
+| C-D  | 7      |
+| D-A  | 1      |
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577236b056379d5dbc7000.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577236b056379d5dbc7000.md
index 7bce57b47fc..5eda27fbd27 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577236b056379d5dbc7000.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577236b056379d5dbc7000.md
@@ -9,7 +9,7 @@ dashedName: step-18
 
 Now you are going to start developing the algorithm to calculate the shortest path between each node in your new graph.
 
-Declare an empty function called `shortest_path` and don't forget the `pass` keyword. 
+Declare an empty function called `shortest_path` and don't forget the `pass` keyword.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655777060d8ddea6741be1b1.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655777060d8ddea6741be1b1.md
index 7a1de345c83..92c06af759b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655777060d8ddea6741be1b1.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655777060d8ddea6741be1b1.md
@@ -47,7 +47,7 @@ def shortest_path(graph, start):
         else:
             distances[node] = float('inf')
     print(f'Unvisited: {unvisited}\nDistances: {distances}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577739f57ecca6c39bb4e9.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577739f57ecca6c39bb4e9.md
index 86a0ca5884d..bf817fb18b2 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577739f57ecca6c39bb4e9.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577739f57ecca6c39bb4e9.md
@@ -51,9 +51,9 @@ my_graph = {
 def shortest_path(graph, start):
     unvisited = []
     distances = {}
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577791ad8c26a7705e2919.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577791ad8c26a7705e2919.md
index 0aa94de8e5d..d373bb7ee2e 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577791ad8c26a7705e2919.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577791ad8c26a7705e2919.md
@@ -57,9 +57,9 @@ my_graph = {
 def shortest_path(graph, start):
     unvisited = list(graph)
     distances = {}
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577a17564ce8a8e06c1460.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577a17564ce8a8e06c1460.md
index a668dc5dbe2..dfa6454e4b9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577a17564ce8a8e06c1460.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65577a17564ce8a8e06c1460.md
@@ -46,7 +46,7 @@ def shortest_path(graph, start):
     distances = {}
     paths = {node: [] for node in graph}
     print(f'Unvisited: {unvisited}\nDistances: {distances}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
index 9fd60a4bd40..cfa2c88c40c 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
@@ -41,9 +41,9 @@ def shortest_path(graph, start):
     unvisited = list(graph)
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c74607d40b6d8c4757f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c74607d40b6d8c4757f.md
index 1faffdcf694..96f7edcd22f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c74607d40b6d8c4757f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c74607d40b6d8c4757f.md
@@ -39,9 +39,9 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cb031cd93b77a285db2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cb031cd93b77a285db2.md
index a9e24846667..7832f5a4ed6 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cb031cd93b77a285db2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cb031cd93b77a285db2.md
@@ -7,7 +7,7 @@ dashedName: step-33
 
 # --description--
 
-Your function is going to explore all the nodes connected to the starting node. It will calculate the shortest paths for all of them. Then, it will remove the starting node from the unvisited nodes. 
+Your function is going to explore all the nodes connected to the starting node. It will calculate the shortest paths for all of them. Then, it will remove the starting node from the unvisited nodes.
 
 Next, the closest neighbor node will be visited and the process will be repeated until all the nodes are visited.
 
@@ -38,9 +38,9 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cee7f2cb8b80127cce2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cee7f2cb8b80127cce2.md
index 3d6c784589f..ba5aa351ad6 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cee7f2cb8b80127cce2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578cee7f2cb8b80127cce2.md
@@ -40,9 +40,9 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d0f6c78a0b868a43b9c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d0f6c78a0b868a43b9c.md
index f661515e703..f412362390e 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d0f6c78a0b868a43b9c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d0f6c78a0b868a43b9c.md
@@ -57,7 +57,7 @@ def shortest_path(graph, start):
         pass
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d4fc3afc3b8f554c882.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d4fc3afc3b8f554c882.md
index ce9dddcf7d5..12646d5a2d0 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d4fc3afc3b8f554c882.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578d4fc3afc3b8f554c882.md
@@ -9,7 +9,7 @@ dashedName: step-36
 
 `min()` takes also a keyword-only argument. Passing a function as an additional argument to `min()`, you can modify the way the list items are compared.
 
-The result of the line you've just written in the previous step is the node that comes first in alphabetical order. Instead you want to select the unvisited node having the smallest distance from the starting node. 
+The result of the line you've just written in the previous step is the node that comes first in alphabetical order. Instead you want to select the unvisited node having the smallest distance from the starting node.
 
 Pass `key=distances.get` as the second argument to your `min()` call. In this way, the comparison will take place depending on the value each `unvisited` list item has inside the `distances` dictionary.
 
@@ -48,7 +48,7 @@ def shortest_path(graph, start):
         current = min(unvisited)
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578f895f2a65ba7a916804.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578f895f2a65ba7a916804.md
index 47ddef981b0..b671a6c9b9b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578f895f2a65ba7a916804.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578f895f2a65ba7a916804.md
@@ -44,7 +44,7 @@ def shortest_path(graph, start):
         current = min(unvisited, key=distances.get)
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578fcf00322dbad5dee05b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578fcf00322dbad5dee05b.md
index 915da4bb733..77e3618f948 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578fcf00322dbad5dee05b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578fcf00322dbad5dee05b.md
@@ -7,7 +7,7 @@ dashedName: step-38
 
 # --description--
 
-Create an `if` statement to check if the distance of the neighbor node (the second item in the processed tuple) plus the distance of `current` is less than the currently known distance of the neighbor node (the first item in the processed tuple). 
+Create an `if` statement to check if the distance of the neighbor node (the second item in the processed tuple) plus the distance of `current` is less than the currently known distance of the neighbor node (the first item in the processed tuple).
 
 Use the `pass` keyword to temporarily fill the body of the `if`.
 
@@ -41,7 +41,7 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
 --fcc-editable-region--
@@ -49,7 +49,7 @@ def shortest_path(graph, start):
             pass
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655790d113d14dbb727eaf41.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655790d113d14dbb727eaf41.md
index 6e66cb1668c..eeaad2c7d62 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655790d113d14dbb727eaf41.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655790d113d14dbb727eaf41.md
@@ -49,6 +49,6 @@ def shortest_path(graph, start):
                 distances[node] = distance + distances[current]
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557910b0ebaeebc18209e90.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557910b0ebaeebc18209e90.md
index 0f77df68976..458fb5974ef 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557910b0ebaeebc18209e90.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557910b0ebaeebc18209e90.md
@@ -49,7 +49,7 @@ def shortest_path(graph, start):
                     pass
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
index cca9cf70aab..bb8994cb4b9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
@@ -50,7 +50,7 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -61,7 +61,7 @@ def shortest_path(graph, start):
                     paths[node] = paths[current]
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
index a66b958aa29..dbac5a53209 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
@@ -51,7 +51,7 @@ def shortest_path(graph, start):
                     paths[node].extend(paths[current])
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791ae44c182bd92f31caa.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791ae44c182bd92f31caa.md
index 4988872c9ea..3f8fd4bea7f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791ae44c182bd92f31caa.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791ae44c182bd92f31caa.md
@@ -11,7 +11,7 @@ Terminate the `while` loop by removing the current node from the `unvisited` lis
 
 # --hints--
 
-You should use the `remove()` function to remove the current node from `unvisited` after your `for` loop. 
+You should use the `remove()` function to remove the current node from `unvisited` after your `for` loop.
 
 ```js
 ({ test: () =>  {
@@ -52,7 +52,7 @@ def shortest_path(graph, start):
                 paths[node].append(node)
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791e6cf5e03be3de73451.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791e6cf5e03be3de73451.md
index fd7452e3572..3d08d5ce21f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791e6cf5e03be3de73451.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791e6cf5e03be3de73451.md
@@ -41,7 +41,7 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -55,9 +55,9 @@ def shortest_path(graph, start):
                     paths[node].extend(paths[current])
                 paths[node].append(node)
         unvisited.remove(current)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65579228c669fcbebffd01d5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65579228c669fcbebffd01d5.md
index e6cc432eb18..9e48d484447 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65579228c669fcbebffd01d5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65579228c669fcbebffd01d5.md
@@ -7,7 +7,7 @@ dashedName: step-47
 
 # --description--
 
-The other bug is subtle. When a shorter distance is found for a neighbor node, `paths[current]` gets assigned to the neighbor node path, `paths[node]`. 
+The other bug is subtle. When a shorter distance is found for a neighbor node, `paths[current]` gets assigned to the neighbor node path, `paths[node]`.
 
 This means both variables point to the same list. Since lists are mutable, when you append the neighbor node to its path, both `paths[node]` and `paths[current]` are modified because they are the same list. This results in wrong paths, although the distances are correct.
 
@@ -38,7 +38,7 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -52,9 +52,9 @@ def shortest_path(graph, start):
                     paths[node].extend(paths[current])
                 paths[node].append(node)
         unvisited.remove(current)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557924d47c325bf27afbe51.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557924d47c325bf27afbe51.md
index e26a4ea9f50..4582411a9d0 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557924d47c325bf27afbe51.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557924d47c325bf27afbe51.md
@@ -49,7 +49,7 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -61,9 +61,9 @@ def shortest_path(graph, start):
                     paths[node].extend(paths[current])
                 paths[node].append(node)
         unvisited.remove(current)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
index cd0b292be74..cbab2f3f4e2 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
@@ -51,7 +51,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
index 757579fb649..9306e351052 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
@@ -65,7 +65,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -79,7 +79,7 @@ def shortest_path(graph, start, target = ''):
         unvisited.remove(current)
 --fcc-editable-region--    
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d86fe1b8947954b9178d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d86fe1b8947954b9178d.md
index 7f6054a003e..457453481a9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d86fe1b8947954b9178d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d86fe1b8947954b9178d.md
@@ -53,7 +53,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -69,7 +69,7 @@ def shortest_path(graph, start, target = ''):
     targets_to_print = [target] if target else graph
     for node in targets_to_print:
         print(f'\n{start}-{node} distance: {distances[node]}\nPath: {" -> ".join(paths[node])}')
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da1b7d75f088f5e6b89f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da1b7d75f088f5e6b89f.md
index 66dc1fa7181..83f8c55c5d8 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da1b7d75f088f5e6b89f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da1b7d75f088f5e6b89f.md
@@ -39,7 +39,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -57,8 +57,8 @@ def shortest_path(graph, start, target = ''):
         if node == start:
             continue
         print(f'\n{start}-{node} distance: {distances[node]}\nPath: {" -> ".join(paths[node])}')
-        
-    
+
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da93115de78dbbdc7ba3.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da93115de78dbbdc7ba3.md
index 66ed7f91e47..b81e1d856d2 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da93115de78dbbdc7ba3.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da93115de78dbbdc7ba3.md
@@ -39,7 +39,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -51,15 +51,15 @@ def shortest_path(graph, start, target = ''):
                     paths[node].extend(paths[current])
                 paths[node].append(node)
         unvisited.remove(current)
-    
+
     targets_to_print = [target] if target else graph
     for node in targets_to_print:
         if node == start:
             continue
         print(f'\n{start}-{node} distance: {distances[node]}\nPath: {" -> ".join(paths[node])}')
-    
+
     return distances, paths
-    
+
 shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
@@ -81,7 +81,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -93,15 +93,15 @@ def shortest_path(graph, start, target = ''):
                     paths[node].extend(paths[current])
                 paths[node].append(node)
         unvisited.remove(current)
-    
+
     targets_to_print = [target] if target else graph
     for node in targets_to_print:
         if node == start:
             continue
         print(f'\n{start}-{node} distance: {distances[node]}\nPath: {" -> ".join(paths[node])}')
-    
+
     return distances, paths
-    
+
 shortest_path(my_graph, 'A', 'F')
 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6567722f53ad97d7ea6bb082.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6567722f53ad97d7ea6bb082.md
index 74385cf9134..48faa3eba0f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6567722f53ad97d7ea6bb082.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6567722f53ad97d7ea6bb082.md
@@ -34,7 +34,7 @@ def shortest_path(graph, start):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -48,9 +48,9 @@ def shortest_path(graph, start):
                     paths[node].extend(paths[current])
                 paths[node].append(node)
         unvisited.remove(current)
-    
+
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65774ae7c3eee66fe79b9459.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65774ae7c3eee66fe79b9459.md
index 10147219640..582db05e491 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65774ae7c3eee66fe79b9459.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65774ae7c3eee66fe79b9459.md
@@ -36,7 +36,7 @@ You should modify `my_graph` into the provided graph.
         'F': [('B', 2), ('D', 3)]
     }
     graph == g
-    
+
   `))
 })
 ```
@@ -59,7 +59,7 @@ def shortest_path(graph, start, target = ''):
     distances = {node: 0 if node == start else float('inf') for node in graph}
     paths = {node: [] for node in graph}
     paths[start].append(start)
-    
+
     while unvisited:
         current = min(unvisited, key=distances.get)
         for node, distance in graph[current]:
@@ -77,7 +77,7 @@ def shortest_path(graph, start, target = ''):
         if node == start:
             continue
         print(f'\n{start}-{node} distance: {distances[node]}\nPath: {" -> ".join(paths[node])}')
-    
+
     return distances, paths
 shortest_path(my_graph, 'A')
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/657891ab9c1903f4e55433ba.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/657891ab9c1903f4e55433ba.md
index c82308e7d36..71969683242 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/657891ab9c1903f4e55433ba.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/657891ab9c1903f4e55433ba.md
@@ -48,7 +48,7 @@ def shortest_path(graph, start):
                 pass
 --fcc-editable-region--
     print(f'Unvisited: {unvisited}\nDistances: {distances}\nPaths: {paths}')
-    
+
 #shortest_path(my_graph, 'A')
 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579dd49fa8a8e1fd06b85a9.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579dd49fa8a8e1fd06b85a9.md
index a53dc2c5cd2..6293f8c90f7 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579dd49fa8a8e1fd06b85a9.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579dd49fa8a8e1fd06b85a9.md
@@ -7,9 +7,8 @@ dashedName: step-11
 
 # --description--
 
-Graphs are data structures representing relations between pairs of elements.
-These elements, called *nodes*, can be real-life objects, entities, points in space or others. The connections between the nodes are called the *edges*.
- 
+Graphs are data structures representing relations between pairs of elements. These elements, called *nodes*, can be real-life objects, entities, points in space or others. The connections between the nodes are called the *edges*.
+
 For example, a graph can be used to represent two points in the space, `A` and `B`, connected by a path. A graph like this will be made of two nodes connected by an edge.
 
 Rename the `copper` dictionary into `my_graph`. This will represent the graph to test your algorithm.
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
index f7140057ced..e752469d616 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
@@ -34,6 +34,6 @@ assert.match(code, / +def\s+__init__\s*\(\s*\)\:/);
 ```py
 --fcc-editable-region--
 class Board:
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688efcc78c9495e73acfc9.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688efcc78c9495e73acfc9.md
index 090cb6a7bc2..22c0328871a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688efcc78c9495e73acfc9.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688efcc78c9495e73acfc9.md
@@ -28,6 +28,6 @@ assert.match(code, /def\s+__init__\s*\(\s*self\s*,\s*board\s*\):/);
 --fcc-editable-region--
 class Board:
     def __init__():
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f22703200963a85dfb7.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f22703200963a85dfb7.md
index 0315c067b9e..a2c396cbf8c 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f22703200963a85dfb7.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f22703200963a85dfb7.md
@@ -27,6 +27,6 @@ assert.match(code, /self\.board\s*=\s*board/);
 --fcc-editable-region--
 class Board:
     def __init__(self, board):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f737b0ef396bf0c22d6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f737b0ef396bf0c22d6.md
index 670b2ea8bd8..eb538959153 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f737b0ef396bf0c22d6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f737b0ef396bf0c22d6.md
@@ -27,7 +27,7 @@ puzzle = [
 
 The resulting grid would look like this:
 
-<img class="img-responsive" src="https://cdn.freecodecamp.org/curriculum/python/sample-board.png" style="background-color: white; height:300px; width:300px; padding: 10px;">
+<img class="img-responsive" src="https://cdn.freecodecamp.org/curriculum/python/sample-board.png" style="background-color: white; height:300px; width:300px; padding: 10px;" />
 
 
 Define a method `__str__` within the `Board` class. Also, add the `self` parameter. This method is automatically called when you use the `str()` function on an instance of the class or when you use `print()` with the object.
@@ -55,6 +55,6 @@ class Board:
     def __init__(self, board):
         self.board = board
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f93a1b6e9970f710f62.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f93a1b6e9970f710f62.md
index 8ef5c8bf774..2d4b4108590 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f93a1b6e9970f710f62.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688f93a1b6e9970f710f62.md
@@ -30,6 +30,6 @@ class Board:
 
 --fcc-editable-region--
     def __str__(self):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688fc27e8dda9760c45d7d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688fc27e8dda9760c45d7d.md
index 09e49231ff5..438bf8be621 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688fc27e8dda9760c45d7d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65688fc27e8dda9760c45d7d.md
@@ -29,6 +29,6 @@ class Board:
 --fcc-editable-region--
     def __str__(self):
         upper_lines = f'\n╔═══{"╤═══"*2}{"╦═══"}{"╤═══"*2}{"╦═══"}{"╤═══"*2}╗\n'
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689020cfd5279803976b25.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689020cfd5279803976b25.md
index 2df9ae6d405..835e65c1a70 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689020cfd5279803976b25.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689020cfd5279803976b25.md
@@ -30,6 +30,6 @@ class Board:
     def __str__(self):
         upper_lines = f'\n╔═══{"╤═══"*2}{"╦═══"}{"╤═══"*2}{"╦═══"}{"╤═══"*2}╗\n'
         middle_lines = f'╟───{"┼───"*2}{"╫───"}{"┼───"*2}{"╫───"}{"┼───"*2}╢\n'
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568904b83a2f29878578146.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568904b83a2f29878578146.md
index b6c4ff759c3..bca25bc2859 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568904b83a2f29878578146.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568904b83a2f29878578146.md
@@ -37,6 +37,6 @@ class Board:
         upper_lines = f'\n╔═══{"╤═══"*2}{"╦═══"}{"╤═══"*2}{"╦═══"}{"╤═══"*2}╗\n'
         middle_lines = f'╟───{"┼───"*2}{"╫───"}{"┼───"*2}{"╫───"}{"┼───"*2}╢\n'
         lower_lines = f'╚═══{"╧═══"*2}{"╩═══"}{"╧═══"*2}{"╩═══"}{"╧═══"*2}╝\n'
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568917528820d99236ad811.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568917528820d99236ad811.md
index 14d4f7cae49..573c9f1d8d7 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568917528820d99236ad811.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568917528820d99236ad811.md
@@ -9,8 +9,7 @@ dashedName: step-10
 
 Now, you need to go over each row in the sudoku board.
 
-Enumeration is a convenient way to keep track of both the element and its position on a list.
-The `enumerate()` function is a built-in function in Python that takes an iterable (such as a list, tuple, or string) and returns an iterator that produces tuples containing indices and corresponding values from the iterable.
+Enumeration is a convenient way to keep track of both the element and its position on a list. The `enumerate()` function is a built-in function in Python that takes an iterable (such as a list, tuple, or string) and returns an iterator that produces tuples containing indices and corresponding values from the iterable.
 
 Initiate a `for` loop to iterate over each row (`line`) in the sudoku board (`self.board`).
 
@@ -48,6 +47,6 @@ class Board:
         lower_lines = f'╚═══{"╧═══"*2}{"╩═══"}{"╧═══"*2}{"╩═══"}{"╧═══"*2}╝\n'
         board_string = upper_lines
 --fcc-editable-region--
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656896ffecbf07a2d3402a93.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656896ffecbf07a2d3402a93.md
index 8e57a17e086..ac974c93572 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656896ffecbf07a2d3402a93.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656896ffecbf07a2d3402a93.md
@@ -52,6 +52,6 @@ class Board:
 
 --fcc-editable-region--
         for index, line in enumerate(self.board):
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
index f18468c6e35..f5829fd8ea1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
@@ -43,6 +43,6 @@ class Board:
 --fcc-editable-region--
         for index, line in enumerate(self.board):
           row_list = []
-          
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568997f94c673a68b035b60.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568997f94c673a68b035b60.md
index ea512b10f29..e7c0ed05dac 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568997f94c673a68b035b60.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568997f94c673a68b035b60.md
@@ -9,7 +9,7 @@ dashedName: step-14
 
 Now, you would join the elements of the segment (`part`) with the pipe character (`|`).
 
-For that, first, use a `for` loop `for item in part` to access all elements. 
+For that, first, use a `for` loop `for item in part` to access all elements.
 
 Then, use the `join()` method on the `|` character to join the elements of the segment (`part`).
 
@@ -17,8 +17,7 @@ After that, convert each element to a string using `str(item)`.
 
 # --hints--
 
-You should use the `join()` method on the `|` character to join the elements of the segment (`part`).
-add test for "" as well
+You should use the `join()` method on the `|` character to join the elements of the segment (`part`). add test for "" as well
 
 ```js
 assert.match(code, /('|")\|\1\.join\s*\(/)
@@ -55,6 +54,6 @@ class Board:
             row_list = []
 --fcc-editable-region--
             for square_no, part in enumerate([line[:3], line[3:6], line[6:]], start=1):
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656899f4214ee6a881bc8649.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656899f4214ee6a881bc8649.md
index a3a58603e1d..950b2d70fe9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656899f4214ee6a881bc8649.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656899f4214ee6a881bc8649.md
@@ -33,10 +33,10 @@ class Board:
         board_string = upper_lines
         for index, line in enumerate(self.board):
             row_list = []
-           
+
 --fcc-editable-region--
             for square_no, part in enumerate([line[:3], line[3:6], line[6:]], start=1):
                 row_square = '|'.join(str(item) for item in part)
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689a748de8fbaa00c5617e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689a748de8fbaa00c5617e.md
index dad88e5a3f4..00c8a75d53c 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689a748de8fbaa00c5617e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689a748de8fbaa00c5617e.md
@@ -34,11 +34,11 @@ class Board:
 
         for index, line in enumerate(self.board):
             row_list = []
-        
+
 --fcc-editable-region--
             for square_no, part in enumerate([line[:3], line[3:6], line[6:]], start=1):
                 row_square = '|'.join(str(item) for item in part)
                 row_list.extend(row_square)
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689aa3d3f2b6aad204a59e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689aa3d3f2b6aad204a59e.md
index 8cef6d1fbea..9b6b8661a06 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689aa3d3f2b6aad204a59e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689aa3d3f2b6aad204a59e.md
@@ -37,9 +37,9 @@ class Board:
             for square_no, part in enumerate([line[:3], line[3:6], line[6:]], start=1):
                 row_square = '|'.join(str(item) for item in part)
                 row_list.extend(row_square)
-            
+
 --fcc-editable-region--
                 if square_no != 3:
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689ad61dfa81ab9ffafc86.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689ad61dfa81ab9ffafc86.md
index e1d0bfac4a9..aea97f55d39 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689ad61dfa81ab9ffafc86.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689ad61dfa81ab9ffafc86.md
@@ -40,9 +40,9 @@ class Board:
             for square_no, part in enumerate([line[:3], line[3:6], line[6:]], start=1):
                 row_square = '|'.join(str(item) for item in part)
                 row_list.extend(row_square)
-        
+
                 if square_no != 3:
                     row_list.append('║')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689b055e6f49ac6f82d3cf.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689b055e6f49ac6f82d3cf.md
index 544c48417e5..407e36ed978 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689b055e6f49ac6f82d3cf.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/65689b055e6f49ac6f82d3cf.md
@@ -55,6 +55,6 @@ class Board:
 
 --fcc-editable-region--
             row = f'║ {" ".join(row_list)} ║\n'
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568a242a3e1efc22b07274d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568a242a3e1efc22b07274d.md
index c897f6d6919..058613246b5 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568a242a3e1efc22b07274d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568a242a3e1efc22b07274d.md
@@ -44,6 +44,6 @@ class Board:
 --fcc-editable-region--
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb1ffe8462c427c0d386.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb1ffe8462c427c0d386.md
index c69ed7e6b28..9a3ff1a7cf7 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb1ffe8462c427c0d386.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb1ffe8462c427c0d386.md
@@ -43,6 +43,6 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb656c67e9c54cced2d7.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb656c67e9c54cced2d7.md
index 10df2062e80..ced1d4b3e99 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb656c67e9c54cced2d7.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bb656c67e9c54cced2d7.md
@@ -46,6 +46,6 @@ class Board:
             board_string += row_empty
 --fcc-editable-region--
             if index < 8:
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bba429481cc693fc2570.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bba429481cc693fc2570.md
index ea53f09c0f7..16d3fd31223 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bba429481cc693fc2570.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bba429481cc693fc2570.md
@@ -44,10 +44,10 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
 --fcc-editable-region--
                 if index % 3 == 2:
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bbc8c3bda1c773e23cf1.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bbc8c3bda1c773e23cf1.md
index 6d78bcb93c5..c6beffc62dd 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bbc8c3bda1c773e23cf1.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bbc8c3bda1c773e23cf1.md
@@ -55,6 +55,6 @@ class Board:
 --fcc-editable-region--
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc19f3418dc8a8821187.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc19f3418dc8a8821187.md
index 197b47e04e0..960dfceced4 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc19f3418dc8a8821187.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc19f3418dc8a8821187.md
@@ -59,6 +59,6 @@ class Board:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
                 else:
                     board_string += middle_lines
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc85c5beadca3e0f6eb1.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc85c5beadca3e0f6eb1.md
index 68b181f4fd6..afb8c4a449a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc85c5beadca3e0f6eb1.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bc85c5beadca3e0f6eb1.md
@@ -56,6 +56,6 @@ class Board:
                     board_string += middle_lines
             else:
                 board_string += lower_lines
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd3741e379ccc220af1b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd3741e379ccc220af1b.md
index 719913583c9..e01f85171de 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd3741e379ccc220af1b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd3741e379ccc220af1b.md
@@ -7,8 +7,7 @@ dashedName: step-28
 
 # --description--
 
-Now you will work on a method that finds the empty cells in the sudoku board.
-For that, within the `Board` class, create a method named `find_empty_cell`. It takes `self` as a parameter, representing the instance of the class. Include the `pass` keyword inside the function body.
+Now you will work on a method that finds the empty cells in the sudoku board. For that, within the `Board` class, create a method named `find_empty_cell`. It takes `self` as a parameter, representing the instance of the class. Include the `pass` keyword inside the function body.
 
 # --hints--
 
@@ -60,6 +59,6 @@ class Board:
 
         return board_string
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd85482755cdd26443ae.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd85482755cdd26443ae.md
index 7b181941b50..2a0e5c16f85 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd85482755cdd26443ae.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bd85482755cdd26443ae.md
@@ -73,6 +73,6 @@ class Board:
 
 --fcc-editable-region--
     def find_empty_cell(self):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bdb69e05a9cee01068a8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bdb69e05a9cee01068a8.md
index 4a8ebeae753..2281e4ebd04 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bdb69e05a9cee01068a8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bdb69e05a9cee01068a8.md
@@ -42,7 +42,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -52,10 +52,10 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
 --fcc-editable-region--
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
index 1def274e4ab..07943e913e1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
@@ -48,7 +48,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -58,11 +58,11 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
 --fcc-editable-region--
             try:
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf22bb5de0d2e8260cf3.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf22bb5de0d2e8260cf3.md
index da49863cccb..416a3ab59c9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf22bb5de0d2e8260cf3.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf22bb5de0d2e8260cf3.md
@@ -44,7 +44,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -54,12 +54,12 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
 --fcc-editable-region--
             try:
                 col = contents.index(0)
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf5e5b2f4bd3eb7ef995.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf5e5b2f4bd3eb7ef995.md
index 7edac62cfea..5a320577312 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf5e5b2f4bd3eb7ef995.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf5e5b2f4bd3eb7ef995.md
@@ -42,7 +42,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -52,13 +52,13 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
 --fcc-editable-region--
             try:
                 col = contents.index(0)
                 return row, col
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf853bf06dd4ed25d4ca.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf853bf06dd4ed25d4ca.md
index ed2c8bda6b5..a20280d43cd 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf853bf06dd4ed25d4ca.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bf853bf06dd4ed25d4ca.md
@@ -9,8 +9,7 @@ dashedName: step-34
 
 If the value `0` is not present in the current row, an exception would be thrown and the `except` block would execute.
 
-The `except` block should pass and continue to the next row.
-Achieve this by using `pass`.
+The `except` block should pass and continue to the next row. Achieve this by using `pass`.
 
 # --hints--
 
@@ -45,7 +44,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -55,7 +54,7 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
             try:
@@ -63,6 +62,6 @@ class Board:
                 return row, col
 --fcc-editable-region--
             except ValueError:
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfb601a54ed5b367b44f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfb601a54ed5b367b44f.md
index 0b8f71149cb..8b70a089c7b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfb601a54ed5b367b44f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfb601a54ed5b367b44f.md
@@ -70,6 +70,6 @@ class Board:
                 return row, col
             except ValueError:
                 pass
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfd65322add674039bde.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfd65322add674039bde.md
index 335eb04b278..c054dc666aa 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfd65322add674039bde.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568bfd65322add674039bde.md
@@ -81,6 +81,6 @@ class Board:
                 pass
         return None
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
index d0c2c410f7d..4a7bc419677 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
@@ -44,7 +44,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -54,7 +54,7 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
             try:
@@ -63,9 +63,9 @@ class Board:
             except ValueError:
                 pass
         return None
-    
+
 --fcc-editable-region--
     def valid_in_row(self, row, num):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
index 15cf62c49c0..2a785397b1f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
@@ -49,7 +49,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -59,7 +59,7 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
             try:
@@ -68,7 +68,7 @@ class Board:
             except ValueError:
                 pass
         return None
-    
+
 --fcc-editable-region--
     def valid_in_row(self, row, num):
         num not in self.board[row]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c073d5f37fd99ab2ab0c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c073d5f37fd99ab2ab0c.md
index 793f94c2cb4..534a8311a44 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c073d5f37fd99ab2ab0c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c073d5f37fd99ab2ab0c.md
@@ -84,6 +84,6 @@ class Board:
     def valid_in_row(self, row, num):
         return num not in self.board[row]
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0a5edddc3daa65d20b2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0a5edddc3daa65d20b2.md
index 966465e7e8a..55a3658da64 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0a5edddc3daa65d20b2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0a5edddc3daa65d20b2.md
@@ -47,7 +47,7 @@ class Board:
             row = f'║ {" ".join(row_list)} ║\n'
             row_empty = row.replace('0', ' ')
             board_string += row_empty
-            
+
             if index < 8:
                 if index % 3 == 2:
                     board_string += f'╠═══{"╪═══"*2}{"╬═══"}{"╪═══"*2}{"╬═══"}{"╪═══"*2}╣\n'
@@ -57,7 +57,7 @@ class Board:
                 board_string += lower_lines
 
         return board_string
-    
+
     def find_empty_cell(self):
         for row, contents in enumerate(self.board):
             try:
@@ -66,12 +66,12 @@ class Board:
             except ValueError:
                 pass
         return None
-    
+
     def valid_in_row(self, row, num):
         return num not in self.board[row]
-    
+
 --fcc-editable-region--
     def valid_in_col(self, col, num):
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
index 04c357639d1..5fe90adbdc7 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
@@ -68,10 +68,10 @@ class Board:
     def valid_in_row(self, row, num):
         return num not in self.board[row]
 
-    
+
 --fcc-editable-region--
     def valid_in_col(self, col, num):
-        
+
 --fcc-editable-region--
         for row in range(9)
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d98303af38193149b66e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d98303af38193149b66e.md
index 66cc72277e3..8f56685f2ed 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d98303af38193149b66e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d98303af38193149b66e.md
@@ -91,6 +91,6 @@ class Board:
             for row in range(9)
         )
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
index 8e97286836d..8d9c209664b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
@@ -11,8 +11,7 @@ Now you need to calculate the starting row index for the 3x3 block in the board
 
 For that, ensure that the starting row index for each 3x3 block is a multiple of 3.
 
-This can be achieved by this mathematical operation: `(row // 3) * 3`.
-Assign the result of this calculation to `row_start`.
+This can be achieved by this mathematical operation: `(row // 3) * 3`. Assign the result of this calculation to `row_start`.
 
 # --hints--
 
@@ -81,6 +80,6 @@ class Board:
 
 --fcc-editable-region--
     def valid_in_square(self, row, col, num):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
index 4457d8b903c..ddc5eec1c84 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
@@ -11,8 +11,7 @@ Next, you need to calculate the starting column index for the 3x3 block in the b
 
 For that, ensure that the starting row index for each 3x3 block is a multiple of 3.
 
-Similar to the previous step, this can be achieved by this mathematical operation: `(col // 3) * 3`.
-Assign the result of this calculation to `col_start`.
+Similar to the previous step, this can be achieved by this mathematical operation: `(col // 3) * 3`. Assign the result of this calculation to `col_start`.
 
 # --hints--
 
@@ -82,6 +81,6 @@ class Board:
 --fcc-editable-region--
     def valid_in_square(self, row, col, num):
         row_start = (row // 3) * 3
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569de93a5340b202667deda.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569de93a5340b202667deda.md
index fa36204c87d..296ab9b40db 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569de93a5340b202667deda.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569de93a5340b202667deda.md
@@ -78,6 +78,6 @@ class Board:
     def valid_in_square(self, row, col, num):
         row_start = (row // 3) * 3
         col_start=(col // 3) * 3
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569def38470282151f873ce.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569def38470282151f873ce.md
index 4596cda03b4..eaf484fab25 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569def38470282151f873ce.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569def38470282151f873ce.md
@@ -79,6 +79,6 @@ class Board:
         col_start=(col // 3) * 3
 --fcc-editable-region--
         for row_no in range(row_start, row_start + 3):
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df1d6fb83d22623b38c5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df1d6fb83d22623b38c5.md
index 9f989410878..ace687c55ee 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df1d6fb83d22623b38c5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df1d6fb83d22623b38c5.md
@@ -82,6 +82,6 @@ class Board:
         for row_no in range(row_start, row_start + 3):
 --fcc-editable-region--
             for col_no in range(col_start, col_start + 3):
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df6916294723e01f0035.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df6916294723e01f0035.md
index 2983662af27..9464102534b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df6916294723e01f0035.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df6916294723e01f0035.md
@@ -81,6 +81,6 @@ class Board:
             for col_no in range(col_start, col_start + 3):
 --fcc-editable-region--
                 if self.board[row_no][col_no] == num:
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df9e20f74a251d482c5d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df9e20f74a251d482c5d.md
index a36c45118b2..e4169f71483 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df9e20f74a251d482c5d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569df9e20f74a251d482c5d.md
@@ -86,6 +86,6 @@ class Board:
             for col_no in range(col_start, col_start + 3):
                 if self.board[row_no][col_no] == num:
                     return False
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569dffeee007f26d2b56d46.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569dffeee007f26d2b56d46.md
index 43eedb08999..609f58fae3b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569dffeee007f26d2b56d46.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569dffeee007f26d2b56d46.md
@@ -7,8 +7,7 @@ dashedName: step-52
 
 # --description--
 
-Within the `Board` class, create another method `is_valid`.
-It would take three parameters:
+Within the `Board` class, create another method `is_valid`. It would take three parameters:
 
 - `self` (representing the instance of the class),
 - `empty` (a tuple representing the row and column indices of an empty cell)
@@ -99,6 +98,6 @@ class Board:
                     return False
         return True
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2a01a97b231862ba2ff.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2a01a97b231862ba2ff.md
index 26b4a74ecc4..0cf33878b57 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2a01a97b231862ba2ff.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2a01a97b231862ba2ff.md
@@ -84,6 +84,6 @@ class Board:
 
 --fcc-editable-region--
     def is_valid(self, empty, num):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2e1944fe7329ab21c7f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2e1944fe7329ab21c7f.md
index 7d0edae2ab9..e83a6028764 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2e1944fe7329ab21c7f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e2e1944fe7329ab21c7f.md
@@ -7,8 +7,7 @@ dashedName: step-54
 
 # --description--
 
-Check if the number is valid for insertion in the specified row by calling `self.valid_in_row(row, num)`
-Assign the result to `valid_in_row`
+Check if the number is valid for insertion in the specified row by calling `self.valid_in_row(row, num)` Assign the result to `valid_in_row`
 
 # --hints--
 
@@ -86,6 +85,6 @@ class Board:
 --fcc-editable-region--
     def is_valid(self, empty, num):
         row, col = empty
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e309feb5d333867a034a.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e309feb5d333867a034a.md
index 3fc6babf606..600de8ba683 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e309feb5d333867a034a.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e309feb5d333867a034a.md
@@ -88,6 +88,6 @@ class Board:
     def is_valid(self, empty, num):
         row, col = empty
         valid_in_row = self.valid_in_row(row, num)
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e33a708a3834f6d4879b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e33a708a3834f6d4879b.md
index fe91d3660b6..0f21e34ca39 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e33a708a3834f6d4879b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e33a708a3834f6d4879b.md
@@ -89,6 +89,6 @@ class Board:
         row, col = empty
         valid_in_row = self.valid_in_row(row, num)
         valid_in_col = self.valid_in_col(col, num)
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e37ec28e853628f18a86.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e37ec28e853628f18a86.md
index f11c18328cc..1f7a21c13c8 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e37ec28e853628f18a86.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e37ec28e853628f18a86.md
@@ -82,7 +82,7 @@ class Board:
                 if self.board[row_no][col_no] == num:
                     return False
         return True
-   
+
 --fcc-editable-region--
     def is_valid(self, empty, num):
         row, col = empty
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e3d1418b373839a0aa7b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e3d1418b373839a0aa7b.md
index b773b1552c8..2925f57e7f4 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e3d1418b373839a0aa7b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e3d1418b373839a0aa7b.md
@@ -100,6 +100,6 @@ class Board:
         valid_in_square = self.valid_in_square(row, col, num)
         return all([valid_in_row, valid_in_col, valid_in_square])
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
index 473bed3d4a2..9e0632ff215 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
@@ -97,6 +97,6 @@ class Board:
 
 --fcc-editable-region--
     def solver(self):
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6b48716b5402504e216.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6b48716b5402504e216.md
index bed8de977d7..bfb9db89a21 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6b48716b5402504e216.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6b48716b5402504e216.md
@@ -92,6 +92,6 @@ class Board:
 --fcc-editable-region--
     def solver(self):
         if (next_empty := self.find_empty_cell()) is None:
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6ebe558bd4136da96cc.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6ebe558bd4136da96cc.md
index 9df6911a790..25d9d4bf2dd 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6ebe558bd4136da96cc.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f6ebe558bd4136da96cc.md
@@ -93,6 +93,6 @@ class Board:
     def solver(self):
         if (next_empty := self.find_empty_cell()) is None:
             return True
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
index 0cb89869b70..273bcc51461 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
@@ -7,7 +7,7 @@ dashedName: step-64
 
 # --description--
 
-If there are still empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive). Your loop should use the variable named `guess`. 
+If there are still empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive). Your loop should use the variable named `guess`.
 
 # --hints--
 
@@ -95,6 +95,6 @@ class Board:
         if (next_empty := self.find_empty_cell()) is None:
             return True
         else:
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f770fd7dc443d6293095.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f770fd7dc443d6293095.md
index 27a4244405c..5baea324998 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f770fd7dc443d6293095.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f770fd7dc443d6293095.md
@@ -96,6 +96,6 @@ class Board:
             return True
         else:
             for guess in range(1, 10):
-                
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7c7f6954944d207775f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7c7f6954944d207775f.md
index d75df894d26..7eb28b81e85 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7c7f6954944d207775f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7c7f6954944d207775f.md
@@ -99,6 +99,6 @@ class Board:
         else:
             for guess in range(1, 10):
                 if self.is_valid(next_empty, guess):
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
index af65f4ff6b2..b82ed6ddc68 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
@@ -98,6 +98,6 @@ class Board:
 --fcc-editable-region--
                 if self.is_valid(next_empty, guess):
                     row, col = next_empty
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
index 131c4203ec6..26274fd86e8 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
@@ -99,6 +99,6 @@ class Board:
                 if self.is_valid(next_empty, guess):
                     row, col = next_empty
                     self.board[row][col] = guess
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
index 24367dc9c31..3d3aab8d861 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
@@ -103,6 +103,6 @@ class Board:
                     self.board[row][col] = guess
                     if self.solver():
                         return True
-                    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fbbfee025a4e850b6eaf.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fbbfee025a4e850b6eaf.md
index 461e0a29539..c33d46799f2 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fbbfee025a4e850b6eaf.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fbbfee025a4e850b6eaf.md
@@ -101,6 +101,6 @@ class Board:
                     if self.solver():
                         return True
                     self.board[row][col] = 0
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
index e54c1ced4c8..966091151e5 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
@@ -107,6 +107,6 @@ class Board:
 
 --fcc-editable-region--
 def solve_sudoku(board):
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fca3cd7a9f52f322a298.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fca3cd7a9f52f322a298.md
index 1b33937fc3e..937d3bdd45a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fca3cd7a9f52f322a298.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fca3cd7a9f52f322a298.md
@@ -108,6 +108,6 @@ class Board:
 --fcc-editable-region--
 def solve_sudoku(board):
     gameboard = Board(board)
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd01dab2ea547d98f093.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd01dab2ea547d98f093.md
index 959c06c3cd4..a89e4b72866 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd01dab2ea547d98f093.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd01dab2ea547d98f093.md
@@ -119,6 +119,6 @@ class Board:
 def solve_sudoku(board):
     gameboard = Board(board)
     print(f'\nPuzzle to solve:\n{gameboard}')
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd352879475599d0ec66.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd352879475599d0ec66.md
index 19586b83f7a..6469a783c80 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd352879475599d0ec66.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd352879475599d0ec66.md
@@ -110,6 +110,6 @@ def solve_sudoku(board):
 --fcc-editable-region--
     if gameboard.solver():
         print('\nSolved puzzle:')
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd6d3cb95856c9ed2190.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd6d3cb95856c9ed2190.md
index c0489a83e8b..ea4c5869ec2 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd6d3cb95856c9ed2190.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fd6d3cb95856c9ed2190.md
@@ -120,6 +120,6 @@ def solve_sudoku(board):
     if gameboard.solver():
         print('\nSolved puzzle:')
         print(gameboard)
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fdc59fe1b658bc9e23a4.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fdc59fe1b658bc9e23a4.md
index 2fa9c57180a..f366526d17a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fdc59fe1b658bc9e23a4.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fdc59fe1b658bc9e23a4.md
@@ -113,6 +113,6 @@ def solve_sudoku(board):
 
     else:
         print('\nThe provided puzzle is unsolvable.')
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/655cd899f8de09431eabb40c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/655cd899f8de09431eabb40c.md
index 3dc7f7ea6d8..130d3cc4bb3 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/655cd899f8de09431eabb40c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/655cd899f8de09431eabb40c.md
@@ -7,11 +7,11 @@ dashedName: step-1
 
 # --description--
 
-In this project, you'll learn data structures by building the merge sort algorithm. 
+In this project, you'll learn data structures by building the merge sort algorithm.
 
 This is a sorting algorithm that uses the divide-and-conquer principle to sort collections of data. That is, it 'divides' a collection into smaller sub-parts, and 'conquers' the sub-parts by sorting them independently, then merges the sorted sub-parts.
 
-Create a function called `merge_sort`. This function will handle the task of sorting a list of numbers. 
+Create a function called `merge_sort`. This function will handle the task of sorting a list of numbers.
 
 Use the `pass` keyword in the function body.
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
index dcd28bb43f5..9c2be28433b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
@@ -7,7 +7,7 @@ dashedName: step-4
 
 # --description--
 
-In the previous step, you got the mid point. You can use it to divide `array` into two and assign each part to new variables. 
+In the previous step, you got the mid point. You can use it to divide `array` into two and assign each part to new variables.
 
 Use the slice syntax to extract the left half of `array` and assign it to a variable named `left_part`.
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656680b0fc79f2c38a34d90e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656680b0fc79f2c38a34d90e.md
index b1f87bb47bc..7dd96ef2d3b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656680b0fc79f2c38a34d90e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656680b0fc79f2c38a34d90e.md
@@ -7,7 +7,7 @@ dashedName: step-10
 
 # --description--
 
-Now it's time to sort and merge the lists (`left_part` and `right_part`) into the original `array`. 
+Now it's time to sort and merge the lists (`left_part` and `right_part`) into the original `array`.
 
 You can do this by comparing elements on both lists, and merging the smaller element to the main list. You are going to do this comparison for all the indexes in `left_part` and `right_part`.
 
@@ -106,7 +106,7 @@ The value of `sorted_index` should be 0
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656702f8b4cbd8cbf0a433c6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656702f8b4cbd8cbf0a433c6.md
index 6b7bfdc65cf..6c346dcaef9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656702f8b4cbd8cbf0a433c6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656702f8b4cbd8cbf0a433c6.md
@@ -7,7 +7,7 @@ dashedName: step-11
 
 # --description--
 
-Inside your function, create a `while` loop that compares an element in `left_part` to an element in `right_part`, and merges the smaller element to the main `array` list. 
+Inside your function, create a `while` loop that compares an element in `left_part` to an element in `right_part`, and merges the smaller element to the main `array` list.
 
 Create two conditions for the loop: one that checks whether the `left_array_index` is less than the length of `left_part` and another condition that checks whether `right_array_index` is less than the length of `right_part`.
 
@@ -47,7 +47,7 @@ Use the `pass` keyword in the body of the loop
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
index da123ecf739..4744a0bbe8a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
@@ -33,7 +33,7 @@ You should replace `pass` keyword with an `if` statement with this condition: `l
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
index a65e0ff66f7..2c570406b6a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
@@ -9,7 +9,7 @@ dashedName: step-13
 
 When the `if` condition evaluates to `True`, it means that the element in the `left_part` list is smaller than the element it is being compared to in the `right_part` list.
 
-In that case, you can assign the `left_part` index to the sorted array. 
+In that case, you can assign the `left_part` index to the sorted array.
 
 Inside the `if` block, remove `pass` and assign `left_part[left_array_index]` to `array[sorted_index]`.
 
@@ -35,7 +35,7 @@ You should replace `pass` with `array[sorted_index] = left_part[left_array_index
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
index c258dad1b9e..7ad925c9e42 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
@@ -7,7 +7,7 @@ dashedName: step-15
 
 # --description--
 
-In a previous step, you assigned the element in the `left_part` to the `array` list because it was smaller. But this will not always be the case. In some comparison cases, the element on the right could be smaller. 
+In a previous step, you assigned the element in the `left_part` to the `array` list because it was smaller. But this will not always be the case. In some comparison cases, the element on the right could be smaller.
 
 Create an `else` clause to execute when the `left_part` index is not less than the `right_part` index.
 
@@ -35,7 +35,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65670d1ef177e7e2b76d9528.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65670d1ef177e7e2b76d9528.md
index 27723212a0b..0d2705ca44b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65670d1ef177e7e2b76d9528.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65670d1ef177e7e2b76d9528.md
@@ -7,7 +7,7 @@ dashedName: step-17
 
 # --description--
 
-The `if` and `else` statements you created in the previous steps will assign elements to the sorted array. 
+The `if` and `else` statements you created in the previous steps will assign elements to the sorted array.
 
 Each element assigned to the sorted array takes up an index in the list. So you have to move to the next index without an element.
 
@@ -35,7 +35,7 @@ You should increment the current value of `sorted_index` by 1.
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
index 99a02f20603..1b51c86eea9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
@@ -49,7 +49,7 @@ You should have the `pass` keyword in the body of your `while` loop
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
index 1ecf929a098..860ed75f302 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
@@ -45,7 +45,7 @@ You should not have `pass` in the `while` loop.
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -65,7 +65,7 @@ def merge_sort(array):
             array[sorted_index] = right_part[right_array_index]
             right_array_index += 1
         sorted_index += 1
-        
+
 --fcc-editable-region--
     while left_array_index < len(left_part):
         pass
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
index a3bd339d543..d2d9129b714 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
@@ -31,7 +31,7 @@ You should use the `+=` operator to increment the current value of `left_array_i
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -51,7 +51,7 @@ def merge_sort(array):
             array[sorted_index] = right_part[right_array_index]
             right_array_index += 1
         sorted_index += 1
-        
+
 --fcc-editable-region--
     while left_array_index < len(left_part):
         array[sorted_index] = left_part[left_array_index]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
index 555d2f7ac62..aa7e38d3270 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
@@ -13,7 +13,7 @@ Using the augmented assignment addition operator, add `1` to the value of `sorte
 
 # --hints--
 
-You should use the `+= ` operator to increment the current value of `sorted_index` by one within the `while` loop.
+You should use the `+=` operator to increment the current value of `sorted_index` by one within the `while` loop.
 
 ```js
 ({
@@ -33,7 +33,7 @@ You should use the `+= ` operator to increment the current value of `sorted_inde
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -53,7 +53,7 @@ def merge_sort(array):
             array[sorted_index] = right_part[right_array_index]
             right_array_index += 1
         sorted_index += 1
-        
+
 --fcc-editable-region--
     while left_array_index < len(left_part):
         array[sorted_index] = left_part[left_array_index]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
index a62e7836ace..3cdfa08f90c 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
@@ -47,7 +47,7 @@ You should have the `pass` keyword in the body of your `while` loop
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -72,7 +72,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
index 787d3572346..b2249ef0771 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
@@ -45,7 +45,7 @@ There should be no `pass` keyword in the `while` loop
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -70,7 +70,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
 --fcc-editable-region--
     while right_array_index < len(right_part):
         pass
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
index 931086d88e2..d2ebff30b59 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
@@ -31,7 +31,7 @@ You should have `right_array_index += 1` within the `while` loop.
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -56,7 +56,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
 --fcc-editable-region--
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
index 81f88820fb8..1943d5e89e9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
@@ -31,7 +31,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -56,7 +56,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
 --fcc-editable-region--
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
index e9d3d057e7d..8bb4030b3db 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
@@ -7,7 +7,7 @@ dashedName: step-26
 
 # --description--
 
-Before testing the `merge_sort()` function, you need to create a base case that stops the function execution when the length of `array` is less than or equal to `1`. 
+Before testing the `merge_sort()` function, you need to create a base case that stops the function execution when the length of `array` is less than or equal to `1`.
 
 This base case will stop the recursion call. Without it, the merge sort operation would continue to run even when the list has been sorted or has no element in it.
 
@@ -38,7 +38,7 @@ You should create an `if` statement to check if `len(array) <= 1`. Don't forget
 def merge_sort(array):
 
 --fcc-editable-region--
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -63,7 +63,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
index a8ee7ff883f..d411e649c34 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
@@ -49,7 +49,7 @@ def merge_sort(array):
     if len(array) <= 1:
         pass
 --fcc-editable-region--
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -74,7 +74,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569beee367427c90c74899e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569beee367427c90c74899e.md
index 96847e5f137..1dd08d4617e 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569beee367427c90c74899e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569beee367427c90c74899e.md
@@ -33,7 +33,7 @@ assert.match(code, /if\s+__name__\s*==\s*'__main__':\s*(?:(?!\bpass\b)[^}]*)*/);
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -58,7 +58,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c05b9166f9d5bb36c09e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c05b9166f9d5bb36c09e.md
index 20da31d7804..78b9f6c51f1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c05b9166f9d5bb36c09e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c05b9166f9d5bb36c09e.md
@@ -25,7 +25,7 @@ You should have `print('Unsorted array:')`
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -50,7 +50,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c166d708dcdf7c8fd34c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c166d708dcdf7c8fd34c.md
index 829074af6e5..cba7b7a9251 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c166d708dcdf7c8fd34c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c166d708dcdf7c8fd34c.md
@@ -25,7 +25,7 @@ assert.match(code, /^\s{4}print\s*\(\s*numbers\s*\)/m)
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -50,7 +50,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
@@ -60,6 +60,6 @@ def merge_sort(array):
 if __name__ == '__main__':
     numbers = [4, 10, 6, 14, 2, 1, 8, 5]
     print('Unsorted array:')
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c1aeecaf95e25a3e2573.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c1aeecaf95e25a3e2573.md
index 71c42bf5796..8df4b7e5ef2 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c1aeecaf95e25a3e2573.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c1aeecaf95e25a3e2573.md
@@ -25,7 +25,7 @@ You should call the `merge_sort` function passing `numbers` as the argument.
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -50,7 +50,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c2cbf6c993ea8cd85682.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c2cbf6c993ea8cd85682.md
index 674a55939ae..37fb4314e37 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c2cbf6c993ea8cd85682.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569c2cbf6c993ea8cd85682.md
@@ -7,7 +7,7 @@ dashedName: step-33
 
 # --description--
 
-At this point, the `numbers` list has been sorted. Call the `print` function to print string `Sorted array: ` and the sorted list.
+At this point, the `numbers` list has been sorted. Call the `print` function to print string `Sorted array:` and the sorted list.
 
 To do that, concatenate `'Sorted array: '` and `str(numbers)` in the `print()` call.
 
@@ -29,7 +29,7 @@ You should have `print('Sorted array: ' + str(numbers))` in your code. Remember
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -54,7 +54,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
@@ -77,7 +77,7 @@ if __name__ == '__main__':
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577254891048c8f2c19e961.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577254891048c8f2c19e961.md
index 73e65dc1b81..a73019abbd7 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577254891048c8f2c19e961.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577254891048c8f2c19e961.md
@@ -30,13 +30,13 @@ You should call `merge_sort()` again after the previous function call.
 ## --seed-contents--
 
 ```py
-    
+
 --fcc-editable-region--
 def merge_sort(array):
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
-    
+
     merge_sort(left_part)
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65772ef923f922cd720e5008.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65772ef923f922cd720e5008.md
index 1c8c0c096c2..ec77db5bf72 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65772ef923f922cd720e5008.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/65772ef923f922cd720e5008.md
@@ -32,11 +32,11 @@ You should pass `left_part` as the argument to your `merge_sort()` call.
 ```py
 --fcc-editable-region--
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
-    
+
     merge_sort()
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577320da0d4c2e594d418e2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577320da0d4c2e594d418e2.md
index 7583c0f72f7..d7de755eb9f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577320da0d4c2e594d418e2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577320da0d4c2e594d418e2.md
@@ -32,7 +32,7 @@ You should pass `right_part` as the argument to your last `merge_sort()` call.
 ```py
 --fcc-editable-region--
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
index b6c08f7b9db..2df795e6b46 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
@@ -37,7 +37,7 @@ You should add `1` to the current value of `left_array_index`.
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657823a9f4f372518614c8b7.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657823a9f4f372518614c8b7.md
index 2607145f054..5a6ae4dd6b6 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657823a9f4f372518614c8b7.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657823a9f4f372518614c8b7.md
@@ -24,7 +24,7 @@ You should add `1` to the current value of `right_array_index`.
       /else:\s*[^}]*right_array_index\s*\+=\s*1/,
       /else:\s*[^}]*right_array_index\s*=\s*right_array_index\s*\+\s*1/
     ]
-    
+
     const anyMatch = allowedMatches.some((match) => match.test(function_body))
     assert.isTrue(anyMatch);
   }
@@ -37,7 +37,7 @@ You should add `1` to the current value of `right_array_index`.
 
 ```py
 def merge_sort(array):
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -53,7 +53,7 @@ def merge_sort(array):
         if left_part[left_array_index] < right_part[right_array_index]:
             array[sorted_index] = left_part[left_array_index]
             left_array_index += 1
-        
+
 --fcc-editable-region--
         else:
             array[sorted_index] = right_part[right_array_index]
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f59751d5a5c9b069ae0f3.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f59751d5a5c9b069ae0f3.md
index ee027cbb48e..d05b37ba120 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f59751d5a5c9b069ae0f3.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f59751d5a5c9b069ae0f3.md
@@ -11,7 +11,7 @@ You can use the `__name__` variable to determine if a Python script is being run
 
 If the value of `__name__` is set to `'__main__'`, it implies that the current script is the main program, and not a module.
 
-In this project, you'll use the current script as the main program. 
+In this project, you'll use the current script as the main program.
 
 Create an `if` statement that checks whether the value of `__name__` is `'__main__'`.
 
@@ -39,7 +39,7 @@ assert.match(code, /if\s+__name__\s*==\s*("|')__main__\1\s*:\s*[^}]*\bpass\b/);
 def merge_sort(array):
     if len(array) <= 1:
         return
-    
+
     middle_point = len(array) // 2
     left_part = array[:middle_point]
     right_part = array[middle_point:]
@@ -64,7 +64,7 @@ def merge_sort(array):
         array[sorted_index] = left_part[left_array_index]
         left_array_index += 1
         sorted_index += 1
-    
+
     while right_array_index < len(right_part):
         array[sorted_index] = right_part[right_array_index]
         right_array_index += 1
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877f71bba2b97acedf9af.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877f71bba2b97acedf9af.md
index 64ca3a45edd..3d438f00c98 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877f71bba2b97acedf9af.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877f71bba2b97acedf9af.md
@@ -15,7 +15,7 @@ str.maketrans({'t': 'c', 'l': 'b'})
 
 The above, when called on a string, will replace all `t` characters with `c` and all `l` characters with `b`.
 
-Create a variable called `card_translation` and assign it a translation table to replace all `-` and ` ` characters with an empty string.
+Create a variable called `card_translation` and assign it a translation table to replace all `-` and `` characters with an empty string.
 
 # --hints--
 
@@ -60,6 +60,6 @@ You should assign `card_translation` a value of `str.maketrans({'-': '', ' ': ''
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656878585631369a6b2d2191.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656878585631369a6b2d2191.md
index 75dfe9301f1..688b70e2842 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656878585631369a6b2d2191.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656878585631369a6b2d2191.md
@@ -56,6 +56,6 @@ You should assign `translated_card_number` a value of `card_number.translate(car
 def main():
     card_number = '4111-1111-4555-1142'
     card_translation = str.maketrans({'-': '', ' ': ''})
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6568789edf2ed39c81983cc4.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6568789edf2ed39c81983cc4.md
index 7cfb8090784..79bb4b8ba39 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6568789edf2ed39c81983cc4.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/6568789edf2ed39c81983cc4.md
@@ -35,6 +35,6 @@ def main():
     card_number = '4111-1111-4555-1142'
     card_translation = str.maketrans({'-': '', ' ': ''})
     translated_card_number = card_number.translate(card_translation)
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
index 5962e092b8c..edf32bb93d1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
@@ -44,7 +44,7 @@ You should have `card_number_reversed = card_number[0:4]` within the `verify_car
 --fcc-editable-region--
 def verify_card_number(card_number):
     sum_of_odd_digits = 0
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879e1c749d7a6c5eba2d2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879e1c749d7a6c5eba2d2.md
index 01b76f53af6..0fddbf69886 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879e1c749d7a6c5eba2d2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879e1c749d7a6c5eba2d2.md
@@ -35,7 +35,7 @@ def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[::-1]
     print(card_number_reversed)
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
index 61fff9f1cc3..08c76d5b389 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
@@ -34,7 +34,7 @@ You should have `odd_digits = card_number_reversed[::2]` within the `verify_card
 def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[::-1]
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a923dd792ad339f9c09.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a923dd792ad339f9c09.md
index d8cc83b92fc..4b103605ab1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a923dd792ad339f9c09.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a923dd792ad339f9c09.md
@@ -35,7 +35,7 @@ def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[::-1]
     odd_digits = card_number_reversed[::2]
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687ad86596e0af38640a84.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687ad86596e0af38640a84.md
index 5dc318f5122..a2af83a3742 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687ad86596e0af38640a84.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687ad86596e0af38640a84.md
@@ -33,7 +33,7 @@ You should have `--fcc-expected--` within the `for` loop.
         const transformedCode = code.replace(/\r/g, "");
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
-    
+
         // Get variable name used in for loop
         const for_loop_variable = function_body.match(/for\s+(\w+)\s+in\s+odd_digits/)?.[1];
         assert.exists(for_loop_variable);
@@ -55,7 +55,7 @@ def verify_card_number(card_number):
     odd_digits = card_number_reversed[::2]
 
     print(odd_digits)
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b182c2a8fb1470e0b97.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b182c2a8fb1470e0b97.md
index ef20502aa19..4feadbbd42a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b182c2a8fb1470e0b97.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b182c2a8fb1470e0b97.md
@@ -34,7 +34,7 @@ def verify_card_number(card_number):
 
     for digit in odd_digits:
         print(digit)
-        
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
index af9f6b17900..790075b4516 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
@@ -76,7 +76,7 @@ def verify_card_number(card_number):
     for digit in odd_digits:
         print(digit)
         sum_of_odd_digits += digit
-        
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b68003a61b46fe691f0.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b68003a61b46fe691f0.md
index 026f347104f..24162752d8a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b68003a61b46fe691f0.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b68003a61b46fe691f0.md
@@ -39,7 +39,7 @@ def verify_card_number(card_number):
     for digit in odd_digits:
         sum_of_odd_digits += int(digit)
     print(sum_of_odd_digits)
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
index 5a56a199f68..e8867112574 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
@@ -41,7 +41,7 @@ def verify_card_number(card_number):
 
 --fcc-editable-region--
     sum_of_even_digits = 0
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687bbfd9a7d6b78cd5b5cf.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687bbfd9a7d6b78cd5b5cf.md
index ff9a5695d74..4e2c2ac06c1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687bbfd9a7d6b78cd5b5cf.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687bbfd9a7d6b78cd5b5cf.md
@@ -62,7 +62,7 @@ def verify_card_number(card_number):
 --fcc-editable-region--
     sum_of_even_digits = 0
     even_digits = card_number_reversed[1::2]
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687da2e60409c45595bbe1.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687da2e60409c45595bbe1.md
index f417dfbafe0..e08d494d3f5 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687da2e60409c45595bbe1.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687da2e60409c45595bbe1.md
@@ -59,7 +59,7 @@ def verify_card_number(card_number):
     even_digits = card_number_reversed[1::2]
     for digit in even_digits:
         number = int(digit) * 2
-        
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
index 29ee1934641..6d0ce52ffaa 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
@@ -60,7 +60,7 @@ def verify_card_number(card_number):
         number = int(digit) * 2
         if number >= 10:
             print(number)
-            
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687dd4b641fdc67d7de487.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687dd4b641fdc67d7de487.md
index 3c53a952932..885e4324656 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687dd4b641fdc67d7de487.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687dd4b641fdc67d7de487.md
@@ -48,7 +48,7 @@ def verify_card_number(card_number):
         if number >= 10:
             print(number)
             number = (number // 10) + (number % 10)
-            
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e069cf4e0c85b0a06b1.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e069cf4e0c85b0a06b1.md
index 8aa3e954d8d..44b6d669a5c 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e069cf4e0c85b0a06b1.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e069cf4e0c85b0a06b1.md
@@ -76,7 +76,7 @@ def verify_card_number(card_number):
         if number >= 10:
             number = (number // 10) + (number % 10)
             print(number)
-        
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e0ed12e20c91811a48d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e0ed12e20c91811a48d.md
index 0208aba38a1..9e4032cf31f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e0ed12e20c91811a48d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e0ed12e20c91811a48d.md
@@ -64,7 +64,7 @@ def verify_card_number(card_number):
         if number >= 10:
             number = (number // 10) + (number % 10)
         sum_of_even_digits += number
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
index db1fb53ff21..3419964a99b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
@@ -19,7 +19,7 @@ You should have `if verify_card_number(translated_card_number):` within the `mai
         const transformedCode = code.replace(/\r/g, "");
         const main = __helpers.python.getDef("\n" + transformedCode, "main");
         const { function_body } = main;
-        
+
         const if_statement = __helpers.python.getBlock("\n" + function_body, "if verify_card_number(translated_card_number)");
         assert.exists(if_statement);
     }
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b4638cb8bcf2729afe9a9.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b4638cb8bcf2729afe9a9.md
index e549cf8d91d..b646af9c7e7 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b4638cb8bcf2729afe9a9.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b4638cb8bcf2729afe9a9.md
@@ -34,7 +34,7 @@ You should have `print(card_number_reversed)` within the `verify_card_number` fu
 def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[0:4]
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
index 8730a8bfcd9..67e06d3ffca 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
@@ -35,7 +35,7 @@ def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[0:4]
     print(card_number_reversed)
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b47dc2cf39e37025dc033.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b47dc2cf39e37025dc033.md
index 041de16ae18..97b1f07b947 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b47dc2cf39e37025dc033.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b47dc2cf39e37025dc033.md
@@ -43,7 +43,7 @@ def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[0:4:2]
     print(card_number_reversed)
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
index b0e26e8a93a..1db47a293b2 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
@@ -42,7 +42,7 @@ def verify_card_number(card_number):
     sum_of_odd_digits = 0
     card_number_reversed = card_number[-1:-5:-1]
     print(card_number_reversed)
-    
+
 --fcc-editable-region--
 def main():
     card_number = '4111-1111-4555-1142'
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65821c1c40ccac44adf38e6b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65821c1c40ccac44adf38e6b.md
index c35f36685dd..46464d5b438 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65821c1c40ccac44adf38e6b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65821c1c40ccac44adf38e6b.md
@@ -36,7 +36,7 @@ You should assign an empty list to the `expenses` variable.
 ```py
 def add_expense(expenses, amount, category):
     pass
-    
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582267ef39f5047411c1743.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582267ef39f5047411c1743.md
index d1b44c773f7..6ef1c125f7d 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582267ef39f5047411c1743.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582267ef39f5047411c1743.md
@@ -41,7 +41,7 @@ Your `print_expenses` function should take a single parameter `expenses`.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822773f4c60a479ec89f66.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822773f4c60a479ec89f66.md
index d83045363fe..9b084b00236 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822773f4c60a479ec89f66.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822773f4c60a479ec89f66.md
@@ -24,7 +24,7 @@ You should have `for expense in expenses:` in your `print_expenses` function. Re
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 --fcc-editable-region--
 def print_expenses(expenses):
     pass
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822934c8a0454803e3ef12.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822934c8a0454803e3ef12.md
index 4eb07ae618f..84a69b3ede3 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822934c8a0454803e3ef12.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822934c8a0454803e3ef12.md
@@ -26,7 +26,7 @@ You should have `print(f'Amount: {expense}, Category: {expense}')` in your `for`
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 --fcc-editable-region--
 def print_expenses(expenses):
     for expense in expenses:
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
index 7389641e58b..7f9f383b8cb 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
@@ -31,7 +31,7 @@ You should pass `f'Amount: {expense["amount"]}, Category: {expense["category"]}'
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 --fcc-editable-region--
 def print_expenses(expenses):
     for expense in expenses:
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823040bdb32949d4c1a96f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823040bdb32949d4c1a96f.md
index 7d4ac5f9d33..269a9b68b37 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823040bdb32949d4c1a96f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823040bdb32949d4c1a96f.md
@@ -39,7 +39,7 @@ Your`total_expenses` function should take a single `expenses` parameter.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
index 92fdc0d0771..43490a8b458 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
@@ -30,14 +30,14 @@ You should have `test = lambda x: x * 2` in your code.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
 
 def total_expenses(expenses):
     pass
-    
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582352cbdbcde4d0c4f7b0b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582352cbdbcde4d0c4f7b0b.md
index 60685d4ceba..ff500947680 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582352cbdbcde4d0c4f7b0b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582352cbdbcde4d0c4f7b0b.md
@@ -26,14 +26,14 @@ You should have `print(test(3))` in your code.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
 
 def total_expenses(expenses):
     pass
-    
+
 --fcc-editable-region--
 test = lambda x: x * 2
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823634a308cb4d6bcc5fa6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823634a308cb4d6bcc5fa6.md
index 9f673977231..f651f054e14 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823634a308cb4d6bcc5fa6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823634a308cb4d6bcc5fa6.md
@@ -32,14 +32,14 @@ You should have `print(map(test, [2, 3, 5, 8]))` in your code.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
 
 def total_expenses(expenses):
     pass
-    
+
 --fcc-editable-region--
 test = lambda x: x * 2
 print(test(3))
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658238f7604f154ea9a23e1e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658238f7604f154ea9a23e1e.md
index 45d487652e1..3937f502dcd 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658238f7604f154ea9a23e1e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658238f7604f154ea9a23e1e.md
@@ -26,14 +26,14 @@ You should print `sum(map(test, [2, 3, 5, 8]))`.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
 
 def total_expenses(expenses):
     pass
-    
+
 --fcc-editable-region--
 test = lambda x: x * 2
 print(map(test, [2, 3, 5, 8]))
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823b0167fd894f4a7ea60a.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823b0167fd894f4a7ea60a.md
index 9d374a285ed..d5386f3df91 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823b0167fd894f4a7ea60a.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823b0167fd894f4a7ea60a.md
@@ -32,14 +32,14 @@ You should delete your `print(sum(map(test, [2, 3, 5, 8])))` call.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
 
 def total_expenses(expenses):
     pass
-    
+
 --fcc-editable-region--
 test = lambda x: x * 2
 print(sum(map(test, [2, 3, 5, 8])))
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
index d4a2f8399d4..1fafe039961 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
@@ -31,11 +31,11 @@ You should have `lambda expense: expense['amount']` in your `total_expenses` fun
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 --fcc-editable-region--
 def total_expenses(expenses):
     pass
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823cfc74aa564ffc460489.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823cfc74aa564ffc460489.md
index 8a3db21c131..656ff52fc46 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823cfc74aa564ffc460489.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823cfc74aa564ffc460489.md
@@ -31,11 +31,11 @@ You should have `map(lambda expense: expense['amount'], expenses)` in your code.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 --fcc-editable-region--
 def total_expenses(expenses):
     lambda expense: expense['amount']
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823dde36392f505a39f7c7.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823dde36392f505a39f7c7.md
index ad2613a1c8a..e19a6ff8af6 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823dde36392f505a39f7c7.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823dde36392f505a39f7c7.md
@@ -31,11 +31,11 @@ You should return `sum(map(lambda expense: expense['amount'], expenses))` from y
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 --fcc-editable-region--
 def total_expenses(expenses):
     map(lambda expense: expense['amount'], expenses)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823e87c9741750a22085a7.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823e87c9741750a22085a7.md
index dc868ffe2a1..95fe1244c8c 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823e87c9741750a22085a7.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823e87c9741750a22085a7.md
@@ -39,14 +39,14 @@ Your `filter_expenses_by_category` function should take `expenses` and `category
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
index a9c3eadb188..758894d8784 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
@@ -31,14 +31,14 @@ You should have `lambda expense: expense['category'] == category` inside the `fi
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 --fcc-editable-region--
 def filter_expenses_by_category(expenses, category):
     pass
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824111a09164518320088d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824111a09164518320088d.md
index 9d8861e0fd9..c8a504c95b7 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824111a09164518320088d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824111a09164518320088d.md
@@ -7,7 +7,7 @@ dashedName: step-21
 
 # --description--
 
-The `filter()` function allows you to select items from an iterable, such as a list, based on the output of a function: 
+The `filter()` function allows you to select items from an iterable, such as a list, based on the output of a function:
 
 ```py
 filter(my_function, my_list)
@@ -39,14 +39,14 @@ You should have `filter(lambda expense: expense['category'] == category, expense
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 --fcc-editable-region--
 def filter_expenses_by_category(expenses, category):
     lambda expense: expense['category'] == category
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658244fdf4b0265334711664.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658244fdf4b0265334711664.md
index 2154fc972fc..31bdb26a2b4 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658244fdf4b0265334711664.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658244fdf4b0265334711664.md
@@ -31,14 +31,14 @@ You should return the result of the `filter()` call from your `filter_expenses_b
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 --fcc-editable-region--
 def filter_expenses_by_category(expenses, category):
     filter(lambda expense: expense['category'] == category, expenses)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
index 56667701c65..8d421ba66de 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
@@ -41,14 +41,14 @@ You should move the `expenses` list inside the `main()` function body.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
index 3cd8e3642fd..365e4b886ce 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
@@ -51,19 +51,19 @@ You should have `print('\nExpense Tracker')` in your `while` loop.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
 --fcc-editable-region--
 def main():
     expenses = []
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
index 7bd3ed13946..1b258f292ea 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
@@ -7,7 +7,7 @@ dashedName: step-25
 
 # --description--
 
-The `while` loop you created in the previous step is an infinite loop that will allow the program to continuously present menu options until the user decides to exit. 
+The `while` loop you created in the previous step is an infinite loop that will allow the program to continuously present menu options until the user decides to exit.
 
 After the `print()` call, add another one to print the string `'1. Add an expense'`.
 
@@ -33,14 +33,14 @@ You should have `print('1. Add an expense')` in your `while` loop.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
 
@@ -49,6 +49,6 @@ def main():
 --fcc-editable-region--
     while True:
         print('\nExpense Tracker')
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
index 93ee461978a..29575b7375a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
@@ -31,14 +31,14 @@ You should have `print('2. List all expenses')` in your `while` loop.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
 
@@ -48,6 +48,6 @@ def main():
     while True:
         print('\nExpense Tracker')
         print('1. Add an expense')
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
index c374d62d60d..6b2bc6ffaee 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
@@ -57,14 +57,14 @@ You should have `print('5. Exit')` in your `while` loop.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
 
@@ -75,6 +75,6 @@ def main():
         print('\nExpense Tracker')
         print('1. Add an expense')
         print('2. List all expenses')
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
index b7a6a5a4592..32fe6ab7e0b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
@@ -33,17 +33,17 @@ You should have `choice = input('Enter your choice: ')` in your `while` loop.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 --fcc-editable-region--
 def main():
     expenses = []
@@ -54,6 +54,6 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
index 34dbde9fb81..0940266004e 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
@@ -48,17 +48,17 @@ You should have `amount = input()` in your `if` statement body:
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 --fcc-editable-region--
 def main():
     expenses = []
@@ -69,7 +69,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
index 83de6165853..2b88a233291 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
@@ -33,17 +33,17 @@ You should have `amount = input('Enter amount: ')` in your `if` statement.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 --fcc-editable-region--
 def main():
     expenses = []
@@ -54,9 +54,9 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
-        
+
         if choice == '1':
             amount = input()
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658254db6e12485a48130f57.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658254db6e12485a48130f57.md
index 3ac10338242..fa6407ee8b5 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658254db6e12485a48130f57.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658254db6e12485a48130f57.md
@@ -33,17 +33,17 @@ You should have `amount = float(input('Enter amount: '))` in your `if` statement
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 --fcc-editable-region--
 def main():
     expenses = []
@@ -54,9 +54,9 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
-        
+
         if choice == '1':
             amount = input('Enter amount: ')
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658255d5f955175b270f251d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658255d5f955175b270f251d.md
index 4a24dd06ee0..b8b4c7503e1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658255d5f955175b270f251d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658255d5f955175b270f251d.md
@@ -31,17 +31,17 @@ You should have `category = input('Enter category: ')` in your `if` statement.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -52,11 +52,11 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 --fcc-editable-region--       
         if choice == '1':
             amount = float(input('Enter amount: '))
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582575b8089f85b8b92d7c8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582575b8089f85b8b92d7c8.md
index 588f91859d2..15a853b8356 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582575b8089f85b8b92d7c8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582575b8089f85b8b92d7c8.md
@@ -9,7 +9,7 @@ dashedName: step-33
 
 After getting the expense details, you need to call the `add_expense` function to add the new expense to the `expenses` list.
 
-After getting the `amount` and `category` using `input()`, call the `add_expense` function, passing three arguments: `expenses`, `amount` and `category`. 
+After getting the `amount` and `category` using `input()`, call the `add_expense` function, passing three arguments: `expenses`, `amount` and `category`.
 
 - `expenses` is the empty list created in the main function earlier in this project.
 - `amount` is the amount of the expense.
@@ -37,17 +37,17 @@ You should have `add_expense(expenses, amount, category)` in your `if` statement
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -58,12 +58,12 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 --fcc-editable-region--
         if choice == '1':
             amount = float(input('Enter amount: '))
             category = input('Enter category: ')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
index ef5f5a90136..0511583a76a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
@@ -46,17 +46,17 @@ You should have `print('\nAll Expenses:')` inside your `elif` statement.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -67,13 +67,13 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 --fcc-editable-region--
         if choice == '1':
             amount = float(input('Enter amount: '))
             category = input('Enter category: ')
             add_expense(expenses, amount, category)
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825a9520a0795c8afbef50.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825a9520a0795c8afbef50.md
index 53051c73dc4..8db118990af 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825a9520a0795c8afbef50.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825a9520a0795c8afbef50.md
@@ -31,17 +31,17 @@ You should have `print_expenses(expenses)` in your `elif` statement.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -52,7 +52,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -62,6 +62,6 @@ def main():
 --fcc-editable-region--
         elif choice == '2':
             print('\nAll Expenses:')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
index f4bedf6c887..77331e9840b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-To show the total expenses, create an `elif` statement that checks if `choice == '3'`. 
+To show the total expenses, create an `elif` statement that checks if `choice == '3'`.
 
 If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `'\nTotal Expenses: '` as the first argument and `total_expenses(expenses)` as the second argument.
 
@@ -46,17 +46,17 @@ You should have `print('\nTotal Expenses: ', total_expenses(expenses))` in your
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -67,7 +67,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-       
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -78,6 +78,6 @@ def main():
         elif choice == '2':
             print('\nAll Expenses:')
             print_expenses(expenses)
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825cda2668995d5168e37c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825cda2668995d5168e37c.md
index d355dc243eb..a4b1b73d0a5 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825cda2668995d5168e37c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825cda2668995d5168e37c.md
@@ -44,17 +44,17 @@ You should have `category = input('Enter category to filter: ')` in your new `el
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -65,7 +65,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-       
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -79,6 +79,6 @@ def main():
 --fcc-editable-region--           
         elif choice == '3':
             print('\nTotal Expenses: ', total_expenses(expenses))
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825e96b5db5f5dee6bf57c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825e96b5db5f5dee6bf57c.md
index 216df85146a..e0dc7f00d81 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825e96b5db5f5dee6bf57c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825e96b5db5f5dee6bf57c.md
@@ -31,17 +31,17 @@ You should print `f'\nExpenses for {category}:'` inside the `elif` statement.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -52,7 +52,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-       
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -69,6 +69,6 @@ def main():
 --fcc-editable-region--
         elif choice == '4':
             category = input('Enter category to filter: ')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582601b2987045e8e7da994.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582601b2987045e8e7da994.md
index 8f058be3798..69c26e53bbf 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582601b2987045e8e7da994.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582601b2987045e8e7da994.md
@@ -31,17 +31,17 @@ You should have `expenses_from_category = filter_expenses_by_category(expenses,
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -52,7 +52,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -70,6 +70,6 @@ def main():
         elif choice == '4':
             category = input('Enter category to filter: ')
             print(f'\nExpenses for {category}:')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582622cb6c11a5f4c5d79b4.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582622cb6c11a5f4c5d79b4.md
index 77c98c73e8e..b7a76116f30 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582622cb6c11a5f4c5d79b4.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582622cb6c11a5f4c5d79b4.md
@@ -31,17 +31,17 @@ You should have `print_expenses(expenses_from_category)` in your code.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -52,7 +52,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -71,6 +71,6 @@ def main():
             category = input('Enter category to filter: ')
             print(f'\nExpenses for {category}:')
             expenses_from_category = filter_expenses_by_category(expenses, category)
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
index 1178193ba5f..a7dc82d4f78 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
@@ -46,17 +46,17 @@ You should print `'Exiting the program.'` in your new `elif` statement.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -67,7 +67,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -87,6 +87,6 @@ def main():
             print(f'\nExpenses for {category}:')
             expenses_from_category = filter_expenses_by_category(expenses, category)
             print_expenses(expenses_from_category)
-        
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826a6e9d189a623141c726.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826a6e9d189a623141c726.md
index 7829a742975..ee34b84f93a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826a6e9d189a623141c726.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826a6e9d189a623141c726.md
@@ -31,17 +31,17 @@ You should have a `break` statement inside your last `elif`.
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -52,7 +52,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-       
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -75,6 +75,6 @@ def main():
 --fcc-editable-region--
         elif choice == '5':
             print('Exiting the program.')
-            
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826af5b226a5628aa154b1.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826af5b226a5628aa154b1.md
index e5f24e2b1f8..6dc2b7f17f5 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826af5b226a5628aa154b1.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826af5b226a5628aa154b1.md
@@ -24,17 +24,17 @@ assert.match(code, /^main\s*\(\s*\)/m)
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -45,7 +45,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-       
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -56,16 +56,16 @@ def main():
         elif choice == '2':
             print('\nAll Expenses:')
             print_expenses(expenses)
-    
+
         elif choice == '3':
             print('\nTotal Expenses: ', total_expenses(expenses))
-    
+
         elif choice == '4':
             category = input('Enter category to filter: ')
             print(f'\nExpenses for {category}:')
             expenses_from_category = filter_expenses_by_category(expenses, category)
             print_expenses(expenses_from_category)
-    
+
         elif choice == '5':
             print('Exiting the program.')
             break
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826befd75db5632bd73df6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826befd75db5632bd73df6.md
index 5daa9a4d51a..c5daf97b54e 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826befd75db5632bd73df6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65826befd75db5632bd73df6.md
@@ -11,7 +11,7 @@ You can use the `__name__` variable to determine if a Python script is being run
 
 If the value of `__name__` is set to `'__main__'`, it implies that the current script is the main program, and not a module.
 
-As a final step, create an `if` statement to check if ` __name__ == '__main__'`, and move the `main()` call inside this block.
+As a final step, create an `if` statement to check if `__name__ == '__main__'`, and move the `main()` call inside this block.
 
 With that, the expense tracker project is complete!
 
@@ -36,17 +36,17 @@ assert.match(code, /^if\s+__name__\s*==\s*("|')__main__\1\s*:\s*main\s*\(\s*\)/m
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -57,7 +57,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
@@ -93,17 +93,17 @@ main()
 ```py
 def add_expense(expenses, amount, category):
     expenses.append({'amount': amount, 'category': category})
-    
+
 def print_expenses(expenses):
     for expense in expenses:
         print(f'Amount: {expense["amount"]}, Category: {expense["category"]}')
-    
+
 def total_expenses(expenses):
     return sum(map(lambda expense: expense['amount'], expenses))
-    
+
 def filter_expenses_by_category(expenses, category):
     return filter(lambda expense: expense['category'] == category, expenses)
-    
+
 
 def main():
     expenses = []
@@ -114,7 +114,7 @@ def main():
         print('3. Show total expenses')
         print('4. Filter expenses by category')
         print('5. Exit')
-        
+
         choice = input('Enter your choice: ')
 
         if choice == '1':
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657e928716b77b2277980276.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657e928716b77b2277980276.md
index 8a1f6be3110..eba03b1de24 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657e928716b77b2277980276.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657e928716b77b2277980276.md
@@ -7,7 +7,7 @@ dashedName: step-1
 
 # --description--
 
-In this project, you are going to learn about list comprehensions in Python by building a program that can take a `camelCase` or `PascalCase` formatted string and convert that to a `snake_case` formatted string. 
+In this project, you are going to learn about list comprehensions in Python by building a program that can take a `camelCase` or `PascalCase` formatted string and convert that to a `snake_case` formatted string.
 
 List comprehensions in Python are a concise way to construct a list without using loops or the `.append()` method. Apart from being briefer, list comprehensions often run faster.
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f43d341a0dd17120cdb08.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f43d341a0dd17120cdb08.md
index a2969fc86c2..a14ede78865 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f43d341a0dd17120cdb08.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f43d341a0dd17120cdb08.md
@@ -51,7 +51,7 @@ def convert_to_snake_case(pascal_or_camel_cased_string):
 
 --fcc-editable-region--
     snake_cased_char_list = [
-        
+
     ]
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f456223b8c1187b461987.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f456223b8c1187b461987.md
index 74e7eb70237..0d05561ca52 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f456223b8c1187b461987.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f456223b8c1187b461987.md
@@ -53,7 +53,7 @@ def convert_to_snake_case(pascal_or_camel_cased_string):
 --fcc-editable-region--
     snake_cased_char_list = [
         '_' + char.lower() if char.isupper()
-        
+
     ]
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f465f8e718b19c5105ae5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f465f8e718b19c5105ae5.md
index 6226601329c..de00f494a78 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f465f8e718b19c5105ae5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f465f8e718b19c5105ae5.md
@@ -61,7 +61,7 @@ def convert_to_snake_case(pascal_or_camel_cased_string):
     snake_cased_char_list = [
         '_' + char.lower() if char.isupper()
         else char
-        
+
     ]
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4a4a5828a01de04b652f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4a4a5828a01de04b652f.md
index 084e1d1686d..7af56e5bc90 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4a4a5828a01de04b652f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4a4a5828a01de04b652f.md
@@ -19,7 +19,7 @@ You should not have any commented line of code in the `convert_to_snake_case()`
         const transformedCode = code.replace(/\r/g, "");
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
-        
+
         assert.equal(function_body.split("#").length - 1, 0);
     }
 })
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
index 76849d9eac2..7e79d4d2696 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
@@ -48,7 +48,7 @@ def convert_to_snake_case(pascal_or_camel_cased_string):
 def main():
     print(convert_to_snake_case('aLongAndComplexString'))
 
-    
+
 --fcc-editable-region--
 
 if __name__ == '__main__':
@@ -71,7 +71,7 @@ def convert_to_snake_case(pascal_or_camel_cased_string):
 def main():
     print(convert_to_snake_case('IAmAPascalCasedString'))
 
-    
+
 
 if __name__ == '__main__':
     main()
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8b1faf9c60304ca8a9b6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8b1faf9c60304ca8a9b6.md
index 0a6e4c3f360..d63fb3410b2 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8b1faf9c60304ca8a9b6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8b1faf9c60304ca8a9b6.md
@@ -11,7 +11,7 @@ In this project, you will solve the mathematical puzzle known as the Tower of Ha
 
 The goal of this puzzle is moving the disks from the first rod to the third rod, following specific rules that restrict placing a larger disk on top of a smaller one.
 
-Start by creating an empty dictionary named `rods` to represent the rods. 
+Start by creating an empty dictionary named `rods` to represent the rods.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc916138dbe03bdfe6cec6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc916138dbe03bdfe6cec6.md
index 5fe2565b412..1cb481dc42b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc916138dbe03bdfe6cec6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc916138dbe03bdfe6cec6.md
@@ -21,11 +21,11 @@ You should declare an empty function named `move`. Remember to use the `pass` ke
 
 ```js
 ({ test: () => {
-		assert(__pyodide.runPython(`
+        assert(__pyodide.runPython(`
         import inspect
         inspect.isfunction(__locals.get('move'))
     `))
-	} 
+    } 
 })
 ```
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc985e6720a23edac63b51.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc985e6720a23edac63b51.md
index f6b5ed22152..a2dea99ef87 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc985e6720a23edac63b51.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc985e6720a23edac63b51.md
@@ -13,7 +13,7 @@ Inside the previously created `for` loop, replace the existing `print()` call wi
 
 # --hints--
 
-You should have an `if` statement that should be executed when `(i + 1) % 3 == 1`. 
+You should have an `if` statement that should be executed when `(i + 1) % 3 == 1`.
 
 ```js
 ({test: () => assert.match(code, /if\s+\(\s*i\s*\+\s*1\s*\)\s*%\s*3\s*==\s*1\s*:/)})
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
index da3d1fbf9d9..ab97d4ec512 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
@@ -13,13 +13,13 @@ Add an `elif` statement for that. Then, print the appropriate string if the cond
 
 # --hints--
 
-You should have an `elif` statement to execute when `remainder == 2`. 
+You should have an `elif` statement to execute when `remainder == 2`.
 
 ```js
 ({test: () => assert.match(code, /elif\s+remainder\s*==\s*2:/)})
 ```
 
-You should print the string `f'Move {i + 1} allowed between {source} and {auxiliary}'`. 
+You should print the string `f'Move {i + 1} allowed between {source} and {auxiliary}'`.
 
 ```js
 ({test: () => assert.match(code, /print\s*\(\s*f('|")Move\s\{\s*i\s*\+\s*1\s*\}\sallowed\sbetween\s\{\s*source\s*\}\sand\s\{\s*auxiliary\s*\s*\}\1\s*\)/)})
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
index 1a3a5620279..df19d8d90dc 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
@@ -9,17 +9,17 @@ dashedName: step-21
 
 Finally, when the move number divided by 3 has no remainder, the movement is allowed between `'B'` and `'C'`.
 
-Add an `elif` statement for that. Then, print the appropriate string if the condition is met. 
+Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
 # --hints--
 
-You should have an `elif` statement to execute when `remainder == 0`. 
+You should have an `elif` statement to execute when `remainder == 0`.
 
 ```js
 ({test: () => assert.match(code, /elif\s+remainder\s*==\s*0\s*:/)})
 ```
 
-You should print the string `f'Move {i + 1} allowed between {auxiliary} and {target}'`. 
+You should print the string `f'Move {i + 1} allowed between {auxiliary} and {target}'`.
 
 ```js
 ({test: () => assert.match(code, /print\s*\(\s*f('|")Move\s\{\s*i\s*\+\s*1\s*\}\sallowed\sbetween\s\{\s*auxiliary\s*\}\sand\s\{\s*target\s*\s*\}\1\s*\)/)})
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcdee07a14f0299ec30559.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcdee07a14f0299ec30559.md
index 330e5ce3d33..ef7b1d8a5db 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcdee07a14f0299ec30559.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcdee07a14f0299ec30559.md
@@ -7,8 +7,7 @@ dashedName: step-22
 
 # --description--
 
-You wrote the code to find the allowed movement between the rods, but the actual move could be in both directions.
-After the `print()` call, declare a variable named `forward` and set it to `False`. You will use that variable to check in which direction you need to move the disk between the rods.
+You wrote the code to find the allowed movement between the rods, but the actual move could be in both directions. After the `print()` call, declare a variable named `forward` and set it to `False`. You will use that variable to check in which direction you need to move the disk between the rods.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd280d69fa818ca782d50.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd280d69fa818ca782d50.md
index 49989e6652b..a021f240f76 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd280d69fa818ca782d50.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd280d69fa818ca782d50.md
@@ -7,8 +7,7 @@ dashedName: step-29
 
 # --description--
 
-As you can see, disk 1 is going back and forth every three moves. This happens because you still need to take care of movements between the other rods.
-Instead of repeating the same code you wrote during the previous few steps and changing the rods, it would be better to move that code inside a function to call in each conditional statement. Declare an empty function named `make_allowed_move()` and don't forget the `pass` keyword.
+As you can see, disk 1 is going back and forth every three moves. This happens because you still need to take care of movements between the other rods. Instead of repeating the same code you wrote during the previous few steps and changing the rods, it would be better to move that code inside a function to call in each conditional statement. Declare an empty function named `make_allowed_move()` and don't forget the `pass` keyword.
 
 # --hints--
 
@@ -56,7 +55,7 @@ def move(n, source, auxiliary, target):
             else:
                 print(f'Moving disk {rods[target][-1]} from {target} to {source}')
                 rods[source].append(rods[target].pop())
-            
+
             # display our progress
             print(rods)
         elif remainder == 2:
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd4fbb4b598199acf5ec5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd4fbb4b598199acf5ec5.md
index 246bce0fde8..cf74659b2ee 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd4fbb4b598199acf5ec5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd4fbb4b598199acf5ec5.md
@@ -56,7 +56,7 @@ def move(n, source, auxiliary, target):
             else:
                 print(f'Moving disk {rods[target][-1]} from {target} to {source}')
                 rods[source].append(rods[target].pop())
-            
+
             # display our progress
             print(rods)
         elif remainder == 2:
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
index 772a5699559..04991cef672 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
@@ -7,8 +7,7 @@ dashedName: step-31
 
 # --description--
 
-It's time to move some code from the `move()` function to the `make_allowed_move()` function. Move the code nested inside the first `if` statement (except the first `print()` call) to your new function. Pay close attention to the indentation.
-Don't forget to remove the `pass` keyword.
+It's time to move some code from the `move()` function to the `make_allowed_move()` function. Move the code nested inside the first `if` statement (except the first `print()` call) to your new function. Pay close attention to the indentation. Don't forget to remove the `pass` keyword.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
index 96a967666e6..46d7bef7fff 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
@@ -48,7 +48,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[target][-1]} from {target} to {source}')
         rods[source].append(rods[target].pop())
-    
+
     # display our progress
     print(rods)
 --fcc-editable-region--    
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
index fdb537b314a..65e6a425afa 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
@@ -49,7 +49,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[target][-1]} from {target} to {rod1}')
         rods[rod1].append(rods[target].pop())
-    
+
     # display our progress
     print(rods)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de73f6c2486518e3064fec.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de73f6c2486518e3064fec.md
index a22bece1f64..4d04c56da31 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de73f6c2486518e3064fec.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de73f6c2486518e3064fec.md
@@ -42,7 +42,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods)
 
@@ -54,7 +54,7 @@ def move(n, source, auxiliary, target):
 --fcc-editable-region--    
         if remainder == 1:
             print(f'Move {i + 1} allowed between {source} and {target}')
-            
+
 --fcc-editable-region--            
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7662244db513d7b673ec.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7662244db513d7b673ec.md
index 3e9f4c9a995..259c98e477b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7662244db513d7b673ec.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7662244db513d7b673ec.md
@@ -50,7 +50,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods)
 
@@ -65,10 +65,10 @@ def move(n, source, auxiliary, target):
             make_allowed_move(source, target)
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
-            
+
         elif remainder == 0:
             print(f'Move {i + 1} allowed between {auxiliary} and {target}')
-            
+
 --fcc-editable-region--
 
 # initiate call from source A to target C with auxiliary B
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
index b549b09126c..1db920c38cf 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
@@ -36,7 +36,7 @@ def make_allowed_move(rod1, rod2):
         forward = True
     elif rods[rod1] and rods[rod1][-1] < rods[rod2][-1]:
         forward = True
-                      
+
     if forward:
         print(f'Moving disk {rods[rod1][-1]} from {rod1} to {rod2}')
         rods[rod2].append(rods[rod1].pop())
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de79de2fac6b1536ebcfdd.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de79de2fac6b1536ebcfdd.md
index ac345377f48..f67ac20e45a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de79de2fac6b1536ebcfdd.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de79de2fac6b1536ebcfdd.md
@@ -38,14 +38,14 @@ def make_allowed_move(rod1, rod2):
         forward = True
     elif rods[rod1] and rods[rod1][-1] < rods[rod2][-1]:
         forward = True      
-                
+
     if forward:
         print(f'Moving disk {rods[rod1][-1]} from {rod1} to {rod2}')
         rods[rod2].append(rods[rod1].pop())
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7be06eb689161dd63cf0.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7be06eb689161dd63cf0.md
index e3d940bf26f..497315ed02e 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7be06eb689161dd63cf0.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7be06eb689161dd63cf0.md
@@ -38,14 +38,14 @@ def make_allowed_move(rod1, rod2):
         forward = True
     elif rods[rod1] and rods[rod1][-1] < rods[rod2][-1]:
         forward = True
-                      
+
     if forward:
         print(f'Moving disk {rods[rod1][-1]} from {rod1} to {rod2}')
         rods[rod2].append(rods[rod1].pop())
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
@@ -56,7 +56,7 @@ def move(n, source, auxiliary, target):
         remainder = (i + 1) % 3
 --fcc-editable-region--     
         if remainder == 1:
-            
+
             print(f'Move {i + 1} allowed between {source} and {target}')
             make_allowed_move(source, target)
 --fcc-editable-region--            
@@ -66,7 +66,7 @@ def move(n, source, auxiliary, target):
         elif remainder == 0:
             print(f'Move {i + 1} allowed between {auxiliary} and {target}')
             make_allowed_move(auxiliary, target)
-           
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df202aa1342114cd077920.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df202aa1342114cd077920.md
index 1a99925d19d..98f0bfd33d2 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df202aa1342114cd077920.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df202aa1342114cd077920.md
@@ -64,7 +64,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
@@ -78,7 +78,7 @@ def move(n, source, auxiliary, target):
             if n % 2 != 0:
                 print(f'Move {i + 1} allowed between {source} and {target}')
                 make_allowed_move(source, target)
-            
+
 --fcc-editable-region--            
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
@@ -86,7 +86,7 @@ def move(n, source, auxiliary, target):
         elif remainder == 0:
             print(f'Move {i + 1} allowed between {auxiliary} and {target}')
             make_allowed_move(auxiliary, target)
-           
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df332162988b13c35b7f7d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df332162988b13c35b7f7d.md
index 9a98f3fe69f..87087d88a18 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df332162988b13c35b7f7d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df332162988b13c35b7f7d.md
@@ -39,14 +39,14 @@ def make_allowed_move(rod1, rod2):
         forward = True
     elif rods[rod1] and rods[rod1][-1] < rods[rod2][-1]:
         forward = True
-                      
+
     if forward:
         print(f'Moving disk {rods[rod1][-1]} from {rod1} to {rod2}')
         rods[rod2].append(rods[rod1].pop())
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
@@ -71,7 +71,7 @@ def move(n, source, auxiliary, target):
         elif remainder == 0:
             print(f'Move {i + 1} allowed between {auxiliary} and {target}')
             make_allowed_move(auxiliary, target)
-           
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df346f4c86461419974c1e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df346f4c86461419974c1e.md
index b181672f399..5a94a4c8acc 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df346f4c86461419974c1e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df346f4c86461419974c1e.md
@@ -60,7 +60,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
@@ -85,7 +85,7 @@ def move(n, source, auxiliary, target):
         elif remainder == 0:
             print(f'Move {i + 1} allowed between {auxiliary} and {target}')
             make_allowed_move(auxiliary, target)
-           
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df353d7ae6dc148fd64f53.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df353d7ae6dc148fd64f53.md
index fb3543a5add..6b0f3351deb 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df353d7ae6dc148fd64f53.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df353d7ae6dc148fd64f53.md
@@ -7,8 +7,7 @@ dashedName: step-42
 
 # --description--
 
-That's all for the iterative solution. From now on you are going to build a function that makes use of a recursive approach. Recursion is when a function calls itself.
-In this case, you are going to use recursion to calculate smaller versions of the same problem.
+That's all for the iterative solution. From now on you are going to build a function that makes use of a recursive approach. Recursion is when a function calls itself. In this case, you are going to use recursion to calculate smaller versions of the same problem.
 
 Delete the whole body of the `move` function except for the comment and the first `print` call. Leave the function declaration as is.
 
@@ -46,7 +45,7 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3e2fac34d813d048f3f9.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3e2fac34d813d048f3f9.md
index 762040f844e..965cda667d5 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3e2fac34d813d048f3f9.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3e2fac34d813d048f3f9.md
@@ -49,14 +49,14 @@ def make_allowed_move(rod1, rod2):
     else:
         print(f'Moving disk {rods[rod2][-1]} from {rod2} to {rod1}')
         rods[rod1].append(rods[rod2].pop())
-    
+
     # display our progress
     print(rods, '\n')
 
 def move(n, source, auxiliary, target):
     # display starting configuration
     print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3f1011888113fbd3d81b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3f1011888113fbd3d81b.md
index 6e833dd4abe..4849c3963ba 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3f1011888113fbd3d81b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df3f1011888113fbd3d81b.md
@@ -56,7 +56,7 @@ rods = {
 def move(n, source, auxiliary, target):
     # display starting configuration
     print(rods, '\n')
-    
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
index 629a5f4cb1e..53d1bd43634 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
@@ -36,10 +36,10 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, auxiliary, target)
-        
+
         # display starting configuration
         print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df47b32b92301a815d5ef8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df47b32b92301a815d5ef8.md
index 53972ba813a..5e356d94331 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df47b32b92301a815d5ef8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df47b32b92301a815d5ef8.md
@@ -38,13 +38,13 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, auxiliary, target)
-        
+
         # move the nth disk from source to target
         rods[target].append(rods[source].pop())
-        
+
         # display our progress
         print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df496c6a8ddf1b38db1ed6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df496c6a8ddf1b38db1ed6.md
index d54fd71cfdc..16713a6f47e 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df496c6a8ddf1b38db1ed6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df496c6a8ddf1b38db1ed6.md
@@ -38,13 +38,13 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, target, auxiliary)
-        
+
         # move the nth disk from source to target
         rods[target].append(rods[source].pop())
-        
+
         # display our progress
         print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e337e3096b7c1739d934e6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e337e3096b7c1739d934e6.md
index 74363e55043..9e84b89f04a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e337e3096b7c1739d934e6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e337e3096b7c1739d934e6.md
@@ -32,12 +32,12 @@ rods = {
 --fcc-editable-region--
 def move(n, source, auxiliary, target):
     if n > 0:
-        
+
         move(n - 1, source, auxiliary, target)
-        
+
         # display starting configuration
         print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
index b9c55284010..cc484dcee01 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
@@ -34,12 +34,12 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, auxiliary, target)
-        
+
         rods[target].append(rods[source].pop())
-        
+
         # display starting configuration
         print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e33a488b4a2717fa22ebf3.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e33a488b4a2717fa22ebf3.md
index bc347cf682c..2d53c75598a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e33a488b4a2717fa22ebf3.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e33a488b4a2717fa22ebf3.md
@@ -32,7 +32,7 @@ rods = {
 
 --fcc-editable-region--
 def move(n, source, auxiliary, target):
-    
+
     print(rods)
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340302bd28513f3e73740.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340302bd28513f3e73740.md
index 34eadc2c61c..1a877f7c364 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340302bd28513f3e73740.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340302bd28513f3e73740.md
@@ -34,13 +34,13 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, auxiliary, target)
-        
+
         # move the nth disk from source to target
         rods[target].append(rods[source].pop())
-        
+
         # display starting configuration
         print(rods, '\n')
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340ecee18af1430939018.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340ecee18af1430939018.md
index 8669e788286..5b97a7b52ce 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340ecee18af1430939018.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e340ecee18af1430939018.md
@@ -34,15 +34,15 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, target, auxiliary)
-        
+
         # move the nth disk from source to target
         rods[target].append(rods[source].pop())
-        
+
         # display our progress
         print(rods, '\n')
-        
+
         move(n - 1,  auxiliary, source, target)
-              
+
 --fcc-editable-region--
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
index 3bbf7d40765..14b5df82ceb 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Although recursion can sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks. 
+Although recursion can sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
 
 Set `NUMBER_OF_DISKS` to `5` and check the output.
 
@@ -34,16 +34,16 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, target, auxiliary)
-        
+
         # move the nth disk from source to target
         target.append(source.pop())
-        
+
         # display our progress
         print(A, B, C, '\n')
-        
+
         # move the n - 1 disks that we left on auxiliary onto target
         move(n - 1,  auxiliary, source, target)
-              
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, A, B, C)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/650c6082e5586f9e3acfcd3b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/650c6082e5586f9e3acfcd3b.md
index 89ae92d87e6..ecb1a7e37e1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/650c6082e5586f9e3acfcd3b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/650c6082e5586f9e3acfcd3b.md
@@ -7,7 +7,7 @@ dashedName: step-52
 
 # --description--
 
-Now, delete the `rods` dictionary and turn its keys into the variables `A`, `B`, and `C`, respectively, keeping their values. Refactor your code to reflect these changes. If you see the output on the terminal, you correctly did this step. 
+Now, delete the `rods` dictionary and turn its keys into the variables `A`, `B`, and `C`, respectively, keeping their values. Refactor your code to reflect these changes. If you see the output on the terminal, you correctly did this step.
 
 # --hints--
 
@@ -58,16 +58,16 @@ def move(n, source, auxiliary, target):
     if n > 0:
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, target, auxiliary)
-        
+
         # move the nth disk from source to target
         rods[target].append(rods[source].pop())
-        
+
         # display our progress
         print(rods, '\n')
-        
+
         # move the n - 1 disks that we left on auxiliary onto target
         move(n - 1,  auxiliary, source, target)
-              
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, 'A', 'B', 'C')
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/65782342850feb3b8d62f936.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/65782342850feb3b8d62f936.md
index 4b5e4b00fbd..f59971f91c3 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/65782342850feb3b8d62f936.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/65782342850feb3b8d62f936.md
@@ -43,7 +43,7 @@ def move(n, source, auxiliary, target):
     # display starting configuration
     print(rods)
     for i in range(number_of_moves):
-        
+
         if (i + 1) % 3 == 1:
             print(f'Move {i + 1} allowed between {source} and {target}')
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b667a772ed53e82962c81.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b667a772ed53e82962c81.md
index 5f63989d25d..18c15eb81c4 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b667a772ed53e82962c81.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b667a772ed53e82962c81.md
@@ -53,16 +53,16 @@ def move(n, source, auxiliary, target):
 --fcc-editable-region--        
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, target, auxiliary)
-        
+
         # move the nth disk from source to target
         target.append(source.pop())
-        
+
         # display our progress
         print(A, B, C, '\n')
-        
+
         # move the n - 1 disks that we left on auxiliary onto target
         move(n - 1,  auxiliary, source, target)
-              
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, A, B, C)
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b6a4a49faec5c600287ba.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b6a4a49faec5c600287ba.md
index fa84c79b7ad..55a3720b263 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b6a4a49faec5c600287ba.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/657b6a4a49faec5c600287ba.md
@@ -41,16 +41,16 @@ def move(n, source, auxiliary, target):
         return
         # move n - 1 disks from source to auxiliary, so they are out of the way
         move(n - 1, source, target, auxiliary)
-        
+
         # move the nth disk from source to target
         target.append(source.pop())
-        
+
         # display our progress
         print(A, B, C, '\n')
-        
+
         # move the n - 1 disks that we left on auxiliary onto target
         move(n - 1,  auxiliary, source, target)
-              
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, A, B, C)
 --fcc-editable-region--
@@ -69,16 +69,16 @@ def move(n, source, auxiliary, target):
         return
     # move n - 1 disks from source to auxiliary, so they are out of the way
     move(n - 1, source, target, auxiliary)
-        
+
     # move the nth disk from source to target
     target.append(source.pop())
-        
+
     # display our progress
     print(A, B, C, '\n')
-        
+
     # move the n - 1 disks that we left on auxiliary onto target
     move(n - 1,  auxiliary, source, target)
-              
+
 # initiate call from source A to target C with auxiliary B
 move(NUMBER_OF_DISKS, A, B, C)
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564683821b2ee3174e7250e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564683821b2ee3174e7250e.md
index 1e4c026690c..7e5ca529542 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564683821b2ee3174e7250e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564683821b2ee3174e7250e.md
@@ -17,7 +17,7 @@ print(string.ascii_lowercase)
 # Output: abcdefghijklmnopqrstuvwxyz
 ```
 
-In this project, you are going to use different constants from the `string` module. 
+In this project, you are going to use different constants from the `string` module.
 
 Declare a new variable called `letters` and assign `string.ascii_letters` to this variable.
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656475bbf1c2573de1d2c69c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656475bbf1c2573de1d2c69c.md
index bdf9f83fd86..53566f52680 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656475bbf1c2573de1d2c69c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656475bbf1c2573de1d2c69c.md
@@ -9,7 +9,7 @@ dashedName: step-11
 
 Every time the code runs, you should see a random character from the `all_characters` string. This is exactly what you want to achieve to create a random password.
 
-However, the algorithm on which `random` relies makes the generated pseudo-random numbers predictable. Therefore, although the `random` module is suitable for the most common applications, it cannot be used for cryptographic purposes, due to its deterministic nature. 
+However, the algorithm on which `random` relies makes the generated pseudo-random numbers predictable. Therefore, although the `random` module is suitable for the most common applications, it cannot be used for cryptographic purposes, due to its deterministic nature.
 
 Instead of importing `random`, import the `secrets` module. Then change the `print()` call to use `secrets.choice(all_characters)`.
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564883669b5af4b69f794cc.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564883669b5af4b69f794cc.md
index a04cc0a51bf..64d89633626 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564883669b5af4b69f794cc.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564883669b5af4b69f794cc.md
@@ -7,7 +7,7 @@ dashedName: step-6
 
 # --description--
 
-Your `all_characters` variable is a string formed by all lowercase and uppercase letters, all the 10 digits and several special characters. 
+Your `all_characters` variable is a string formed by all lowercase and uppercase letters, all the 10 digits and several special characters.
 
 Just before it, add a comment saying `Combine all characters`.
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648eefbee2014f5815f4ba.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648eefbee2014f5815f4ba.md
index 2351611d9f1..8c2c24210e1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648eefbee2014f5815f4ba.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648eefbee2014f5815f4ba.md
@@ -43,6 +43,6 @@ def generate_password(length):
     all_characters = letters + digits + symbols
 --fcc-editable-region--    
     password = ''
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648f4b2281ba50051ae39c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648f4b2281ba50051ae39c.md
index e2e180033f5..8d732012fd9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648f4b2281ba50051ae39c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65648f4b2281ba50051ae39c.md
@@ -57,6 +57,6 @@ def generate_password(length):
 --fcc-editable-region--    
     password = ''
     # Generate password
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656490295d346850a4c4f2b5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656490295d346850a4c4f2b5.md
index a31789007a2..c38fca08fe3 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656490295d346850a4c4f2b5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656490295d346850a4c4f2b5.md
@@ -46,6 +46,6 @@ def generate_password(length):
     # Generate password
     for _ in range(length):
         password += secrets.choice(all_characters)
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649122c7f77f519aaf0975.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649122c7f77f519aaf0975.md
index 37997047d64..64544744f18 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649122c7f77f519aaf0975.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649122c7f77f519aaf0975.md
@@ -50,9 +50,9 @@ def generate_password(length):
     # Generate password
     for _ in range(length):
         password += secrets.choice(all_characters)
-        
+
     return password
-    
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656491fa4e69005287eb5a9a.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656491fa4e69005287eb5a9a.md
index 10643186b08..ecd1865b668 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656491fa4e69005287eb5a9a.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656491fa4e69005287eb5a9a.md
@@ -39,9 +39,9 @@ def generate_password(length):
     # Generate password
     for _ in range(length):
         password += secrets.choice(all_characters)
-        
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password(8)
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656494269ccce754411a2112.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656494269ccce754411a2112.md
index 06daef69d1e..8a64d1638d6 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656494269ccce754411a2112.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656494269ccce754411a2112.md
@@ -44,7 +44,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649a631440b757f9f7b428.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649a631440b757f9f7b428.md
index 766eaf6b0ef..97fd01099aa 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649a631440b757f9f7b428.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/65649a631440b757f9f7b428.md
@@ -56,7 +56,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564a767a7241362f7d8d664.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564a767a7241362f7d8d664.md
index ae5e8ab15e1..8cac5406d6a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564a767a7241362f7d8d664.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564a767a7241362f7d8d664.md
@@ -7,8 +7,7 @@ dashedName: step-18
 
 # --description--
 
-A standalone single underscore is used to represent a value you don't care or that won't be used in your code.
-Your iteration variable is not actually used.
+A standalone single underscore is used to represent a value you don't care or that won't be used in your code. Your iteration variable is not actually used.
 
 Modify your `i` variable into a single underscore.
 
@@ -49,6 +48,6 @@ def generate_password(length):
     # Generate password
     for i in range(length):
         password += secrets.choice(all_characters)
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564b8c9349bd76dc037967b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564b8c9349bd76dc037967b.md
index df213fe08f1..e6133274e27 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564b8c9349bd76dc037967b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564b8c9349bd76dc037967b.md
@@ -55,7 +55,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564c67db26c417561ab510d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564c67db26c417561ab510d.md
index ea14a6de78f..96252d48f10 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564c67db26c417561ab510d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564c67db26c417561ab510d.md
@@ -50,13 +50,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cbb6311a40783b3f5de6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cbb6311a40783b3f5de6.md
index 525deb93a9a..3f39b104ccd 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cbb6311a40783b3f5de6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cbb6311a40783b3f5de6.md
@@ -43,13 +43,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '[0123456789]')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cf2e8642517abdf9d6e2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cf2e8642517abdf9d6e2.md
index 241ee2936b0..a764b0f3881 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cf2e8642517abdf9d6e2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564cf2e8642517abdf9d6e2.md
@@ -47,7 +47,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d096a55d707bd77ab67b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d096a55d707bd77ab67b.md
index 7c060bca5cf..d431ffcc25c 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d096a55d707bd77ab67b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d096a55d707bd77ab67b.md
@@ -43,13 +43,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '[0-9]')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d27c8e4c197d367c3b1c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d27c8e4c197d367c3b1c.md
index 1d7f583c3e4..677ebab6921 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d27c8e4c197d367c3b1c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d27c8e4c197d367c3b1c.md
@@ -47,7 +47,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d2eeb36ebe7dd9bd1ee9.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d2eeb36ebe7dd9bd1ee9.md
index 9bbbad8cfdf..2de4994b1d4 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d2eeb36ebe7dd9bd1ee9.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d2eeb36ebe7dd9bd1ee9.md
@@ -48,7 +48,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d500f1a48e7f2b732a37.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d500f1a48e7f2b732a37.md
index 4367db96fc0..3b044ed2767 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d500f1a48e7f2b732a37.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d500f1a48e7f2b732a37.md
@@ -49,7 +49,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d68c34027a8072a704f4.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d68c34027a8072a704f4.md
index 85af9f0e5c7..6ee4a7c4ee6 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d68c34027a8072a704f4.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d68c34027a8072a704f4.md
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '[0-9]'),
             (lowercase, '[a-z]'),
@@ -50,7 +50,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d75a923d21815caaa445.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d75a923d21815caaa445.md
index 4ae0fdbe47f..4de7c601ea8 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d75a923d21815caaa445.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d75a923d21815caaa445.md
@@ -43,7 +43,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '[0-9]'),
             (lowercase, '[a-z]'),
@@ -52,7 +52,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d97a5ef99783216a6229.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d97a5ef99783216a6229.md
index 132d22a267f..c3f7fec1453 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d97a5ef99783216a6229.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564d97a5ef99783216a6229.md
@@ -43,7 +43,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '[0-9]'),
             (lowercase, '[a-z]'),
@@ -52,7 +52,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564daa2725b9b8420141b1c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564daa2725b9b8420141b1c.md
index 39f6c2d6d8e..dd248f1b433 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564daa2725b9b8420141b1c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564daa2725b9b8420141b1c.md
@@ -50,7 +50,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564db880cf9408535f17ff4.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564db880cf9408535f17ff4.md
index af15d2918e5..4d392f22eab 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564db880cf9408535f17ff4.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564db880cf9408535f17ff4.md
@@ -50,7 +50,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564dd65c3c2fa873a83d213.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564dd65c3c2fa873a83d213.md
index d798220a04a..b33c32c7618 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564dd65c3c2fa873a83d213.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564dd65c3c2fa873a83d213.md
@@ -52,7 +52,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564de10a0887f882b0012d3.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564de10a0887f882b0012d3.md
index 1a1fcb72764..831c904373c 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564de10a0887f882b0012d3.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564de10a0887f882b0012d3.md
@@ -52,7 +52,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564eebf0d2d6390b9377197.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564eebf0d2d6390b9377197.md
index af02fd4a4d4..ba029a9d60c 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564eebf0d2d6390b9377197.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564eebf0d2d6390b9377197.md
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -50,7 +50,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564efa70114b591b74d5679.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564efa70114b591b74d5679.md
index 93ba3536c1b..881e63a0538 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564efa70114b591b74d5679.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564efa70114b591b74d5679.md
@@ -43,7 +43,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -52,7 +52,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
index f879fb2ac72..857ca1ca1be 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
@@ -49,7 +49,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -58,7 +58,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f32b18480893cf7799fd.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f32b18480893cf7799fd.md
index cbce569f3af..ed506e33b8a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f32b18480893cf7799fd.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f32b18480893cf7799fd.md
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f583ca6fbf9556098dd6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f583ca6fbf9556098dd6.md
index 80f33eace1d..bc20cdf88bc 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f583ca6fbf9556098dd6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f583ca6fbf9556098dd6.md
@@ -48,7 +48,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
             (uppercase, r'[A-Z]'),            
             (special_chars, fr'[{symbols}]')            
         ]
-        
+
 --fcc-editable-region--
     return password
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f834dd717998092cfd47.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f834dd717998092cfd47.md
index 9651ba05628..0736211025f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f834dd717998092cfd47.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f834dd717998092cfd47.md
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -50,7 +50,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]
 --fcc-editable-region--         
         # Check constraints
-        
+
 --fcc-editable-region--
     return password
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564fd78ffff909b1531d3c3.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564fd78ffff909b1531d3c3.md
index 29e6ef008b3..54b45b0fb2f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564fd78ffff909b1531d3c3.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564fd78ffff909b1531d3c3.md
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565012a2564509d40a90048.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565012a2564509d40a90048.md
index f7c0e64b857..21b603444cc 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565012a2564509d40a90048.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565012a2564509d40a90048.md
@@ -43,7 +43,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bb128adfcd5ec362382d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bb128adfcd5ec362382d.md
index 35bffcc8291..505d092e1d8 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bb128adfcd5ec362382d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bb128adfcd5ec362382d.md
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bd4265158360de8e2ae7.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bd4265158360de8e2ae7.md
index 9799f90428b..770ea94b470 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bd4265158360de8e2ae7.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565bd4265158360de8e2ae7.md
@@ -47,7 +47,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c014db6e9b63c257771d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c014db6e9b63c257771d.md
index f8763d36d4c..92d11f10961 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c014db6e9b63c257771d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c014db6e9b63c257771d.md
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -50,7 +50,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]
 --fcc-editable-region--         
         # Check constraints
-        
+
         for constraint, pattern in constraints:
             constraint <= len(re.findall(pattern, password))
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c084627071646f94c4b0.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c084627071646f94c4b0.md
index cc05d24a567..858ec18db2c 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c084627071646f94c4b0.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c084627071646f94c4b0.md
@@ -47,7 +47,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c13fdb798865c161d8f8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c13fdb798865c161d8f8.md
index 1ff7833aaf6..2f5949f9ea4 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c13fdb798865c161d8f8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c13fdb798865c161d8f8.md
@@ -7,7 +7,7 @@ dashedName: step-65
 
 # --description--
 
-Now it's time to test your function. Uncomment the last two lines in your code and modify the function call passing 5 arguments. Use `8` for the length and `1` for the other four constraints. 
+Now it's time to test your function. Uncomment the last two lines in your code and modify the function call passing 5 arguments. Use `8` for the length and `1` for the other four constraints.
 
 # --hints--
 
@@ -47,14 +47,14 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
             (uppercase, r'[A-Z]'),            
             (special_chars, fr'[{symbols}]')            
         ]
-        
+
         # Check constraints        
         if all(
             constraint <= len(re.findall(pattern, password))
@@ -63,7 +63,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
             break
 
     return password
-    
+
 --fcc-editable-region--
 # new_password = generate_password(8)
 # print(new_password)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c234de8cdf673c96bdf3.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c234de8cdf673c96bdf3.md
index 37a0652b40b..e6540652cdb 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c234de8cdf673c96bdf3.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c234de8cdf673c96bdf3.md
@@ -43,7 +43,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -57,9 +57,9 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password(length=8, nums=1, special_chars=1, uppercase=1, lowercase=1)
 print(new_password)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c32f89ab8d68b42aff30.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c32f89ab8d68b42aff30.md
index b5336c8fb85..c69acbea092 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c32f89ab8d68b42aff30.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c32f89ab8d68b42aff30.md
@@ -42,7 +42,7 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -56,9 +56,9 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password(length=8)
 print(new_password)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c3a146bd5469b62bc59e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c3a146bd5469b62bc59e.md
index d5ffe314062..50830b1e56d 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c3a146bd5469b62bc59e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c3a146bd5469b62bc59e.md
@@ -42,7 +42,7 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -56,9 +56,9 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password()
 print(new_password)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c4767f49286aec825c6d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c4767f49286aec825c6d.md
index a3a56df3890..b7e0bcf6d20 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c4767f49286aec825c6d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6565c4767f49286aec825c6d.md
@@ -7,7 +7,7 @@ dashedName: step-72
 
 # --description--
 
-Finally, put the last two lines of your code inside an `if` statement that execute when `__name__ == '__main__'`. In this way, your code won't run when imported as a module. Otherwise, it will call `generate_password()` and print the generated password. 
+Finally, put the last two lines of your code inside an `if` statement that execute when `__name__ == '__main__'`. In this way, your code won't run when imported as a module. Otherwise, it will call `generate_password()` and print the generated password.
 
 With that, the password generator project is complete.
 
@@ -44,7 +44,7 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -58,9 +58,9 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password()
 print('Generated password:', new_password)
@@ -90,7 +90,7 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -104,13 +104,13 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
             for constraint, pattern in constraints
         ):            
             break
-    
+
     return password
-    
+
 
 if __name__ == '__main__':
     new_password = generate_password()
     print('Generated password:', new_password)
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656eec2f40d18056cc58b229.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656eec2f40d18056cc58b229.md
index 19ef5b075ed..d6f76c398d4 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656eec2f40d18056cc58b229.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656eec2f40d18056cc58b229.md
@@ -48,13 +48,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)    
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef54070c72161e6feb90f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef54070c72161e6feb90f.md
index df879472d40..c228d116671 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef54070c72161e6feb90f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef54070c72161e6feb90f.md
@@ -45,9 +45,9 @@ def generate_password(length):
     # Generate password
     for _ in range(length):
         password += secrets.choice(all_characters)
-        
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password(8)
 print(new_password)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef5bc5c0cd464be1df675.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef5bc5c0cd464be1df675.md
index 5467293cf15..9243b37e999 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef5bc5c0cd464be1df675.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef5bc5c0cd464be1df675.md
@@ -48,7 +48,7 @@ def generate_password(length):
     # Generate password
     for _ in range(length):
         password += secrets.choice(all_characters)
-        
+
     return password
 
 # new_password = generate_password(8)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef7f792734072dedd8319.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef7f792734072dedd8319.md
index c86eb3203a1..23302efab45 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef7f792734072dedd8319.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef7f792734072dedd8319.md
@@ -47,7 +47,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
 --fcc-editable-region--
     return password
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef89b4b486b7a16077864.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef89b4b486b7a16077864.md
index 28b451cbff4..87ae1589b61 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef89b4b486b7a16077864.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656ef89b4b486b7a16077864.md
@@ -56,7 +56,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
             password += secrets.choice(all_characters)
 --fcc-editable-region--        
         constraints = []
-        
+
 --fcc-editable-region--
     return password
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f04b20397d9a574cc7eb2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f04b20397d9a574cc7eb2.md
index da5f46bf97d..cf655982221 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f04b20397d9a574cc7eb2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f04b20397d9a574cc7eb2.md
@@ -47,13 +47,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0bc259c1f6b57486ed68.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0bc259c1f6b57486ed68.md
index cd324988a3d..6fda7cc424b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0bc259c1f6b57486ed68.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0bc259c1f6b57486ed68.md
@@ -43,13 +43,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0d6bc60b58b9777a36c9.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0d6bc60b58b9777a36c9.md
index 6da7ea8c974..b93f2557224 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0d6bc60b58b9777a36c9.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f0d6bc60b58b9777a36c9.md
@@ -47,13 +47,13 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, '')
         ]        
 
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
index f72f8ce291b..6d1e251e974 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
@@ -47,7 +47,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ]        
 --fcc-editable-region--
     return password
-    
+
 # new_password = generate_password(8)
 # print(new_password)
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
index 0a5001e8c92..4e2c28000cc 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
@@ -15,7 +15,7 @@ The list stores the results of evaluating the expression `constraint <= len(re.f
 
 # --hints--
 
-You should replace your existing `for` loop and two `if` statements with a single `if` statement. 
+You should replace your existing `for` loop and two `if` statements with a single `if` statement.
 
 ```js
 ({ test: () => {
@@ -54,7 +54,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -68,7 +68,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         for constraint, pattern in constraints:
             if constraint <= len(re.findall(pattern, password)):
                 count += 1
-            
+
         if count == 4:
 --fcc-editable-region--
             break
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657732654845d8e2fb1217e6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657732654845d8e2fb1217e6.md
index d94550adf54..a602ebe0525 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657732654845d8e2fb1217e6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657732654845d8e2fb1217e6.md
@@ -45,7 +45,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -60,7 +60,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         for constraint, pattern in constraints]:
 --fcc-editable-region--        
             break
-    
+
     return password
 
 # new_password = generate_password(8)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577333feab1e8e927014f03.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577333feab1e8e927014f03.md
index 4af481db69e..f1d4cfad6b9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577333feab1e8e927014f03.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577333feab1e8e927014f03.md
@@ -45,7 +45,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -64,7 +64,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ):
 --fcc-editable-region--
             break
-    
+
     return password
 
 # new_password = generate_password(8)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657733bc97eb83efdb7e3988.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657733bc97eb83efdb7e3988.md
index 1a6ad451a06..1eca94156e0 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657733bc97eb83efdb7e3988.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657733bc97eb83efdb7e3988.md
@@ -41,7 +41,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-       
+
         constraints = [
             (nums, r'\d'),
             (lowercase, r'[a-z]'),
@@ -57,7 +57,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         ):
 --fcc-editable-region--
             break
-    
+
     return password
 
 # new_password = generate_password(8)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657dadf4d8b93c1704f3a57c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657dadf4d8b93c1704f3a57c.md
index 1bfd5e5a824..c8b600a331e 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657dadf4d8b93c1704f3a57c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657dadf4d8b93c1704f3a57c.md
@@ -9,7 +9,7 @@ dashedName: step-66
 
 It works, but there are still a couple of things you can improve. First of all, calling a function with 5 arguments can create confusion on which value will be assigned to which parameter.
 
-You can call a function using keyword arguments, that is writing the parameter name explicitly followed by the assignment operator and the value. For example:
+You can call a function using keyword arguments, that is writing the parameter name explicitly followed by the assignment operator and the value. 예시:
 
 ```py
 def add(x, y):
@@ -39,7 +39,7 @@ import string
 
 
 def generate_password(length, nums, special_chars, uppercase, lowercase):
-   
+
     # Define the possible characters for the password
     letters = string.ascii_letters
     digits = string.digits
@@ -53,7 +53,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -67,9 +67,9 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 --fcc-editable-region-- 
 new_password = generate_password(8, 1, 1, 1, 1)
 print(new_password)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db2114b4029241956f5d6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db2114b4029241956f5d6.md
index b43d2b5be44..71c31515e27 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db2114b4029241956f5d6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db2114b4029241956f5d6.md
@@ -48,7 +48,7 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -62,9 +62,9 @@ def generate_password(length, nums, special_chars, uppercase, lowercase):
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 
 new_password = generate_password(nums=1, length=8, special_chars=1, uppercase=1, lowercase=1)
 print(new_password)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db4cb77190e33a20e852a.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db4cb77190e33a20e852a.md
index c0ee80f692f..b3f1ffd53d1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db4cb77190e33a20e852a.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/657db4cb77190e33a20e852a.md
@@ -43,7 +43,7 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
         # Generate password
         for _ in range(length):
             password += secrets.choice(all_characters)
-        
+
         constraints = [
             (nums, r'\d'),
             (special_chars, fr'[{symbols}]'),
@@ -57,9 +57,9 @@ def generate_password(length=16, nums=1, special_chars=1, uppercase=1, lowercase
             for constraint, pattern in constraints
         ):
             break
-    
+
     return password
-    
+
 --fcc-editable-region--
 new_password = generate_password(nums=1, length=8, special_chars=1, uppercase=1, lowercase=1)
 print(new_password)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
index e55d6fbfb37..7c28d74b6b7 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `'Hello World'`, `'H'` is at index `0`, `'e'` is at index `1`, and so on. 
+Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `'Hello World'`, `'H'` is at index `0`, `'e'` is at index `1`, and so on.
 
 Each character of a string can be accessed by using bracket notation. You need to write the variable name followed by square brackets and add the index of the character between the brackets:
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index 41811515713..a8da79ffd22 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -35,14 +35,14 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i/m)
 ```
 
-You should write the `in` keyword after `for i `. Make sure to leave a space around the `in` keyword.
+You should write the `in` keyword after `for i`. Make sure to leave a space around the `in` keyword.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i\s+in\s+/m)
 ```
 
-You should write `text` after `for i in `. Don't forget to add the final `:`.
+You should write `text` after `for i in`. Don't forget to add the final `:`.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 179f7313a5d..47211f5e8bc 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -7,8 +7,7 @@ dashedName: step-59
 
 # --description--
 
-Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text.
-At the beginning of your function body, declare a `key_index` variable and set it to zero.
+Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text. At the beginning of your function body, declare a `key_index` variable and set it to zero.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 660fb4ab263..7e452e05438 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
 
     for char in message.lower():
 --fcc-editable-region--
-        
+
         if char == ' ':
             encrypted_text += char
 --fcc-editable-region--            
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7727f6c57a8..7ca155b0c73 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -7,8 +7,7 @@ dashedName: step-62
 
 # --description--
 
-You will need to increase the `key_index` count for the next iteration.
-To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
+You will need to increase the `key_index` count for the next iteration. To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index 67567e88cdf..a6cd4a9a348 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
         if char == ' ':
             encrypted_text += char
         else:
-            
+
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index da202c1490a..7ca3ec197c0 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -50,7 +50,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key):
             # Find the right key character to encode
             key_char = key[key_index % len(key)]
             key_index += 1
-            
+
 --fcc-editable-region--            
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index 7ca7c2f323a..f783cbf3472 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -32,7 +32,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -41,7 +41,7 @@ def vigenere(message, key):
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
-            
+
             offset = alphabet.index(key_char)
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index a371865b1ef..28c793c06c3 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -55,7 +55,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index 60289b5525e..acf5b0f71c8 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -43,7 +43,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -57,7 +57,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index b1f7c3a5caa..87f8a5aa7f3 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -31,7 +31,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 534ff69ec91..84f3a8477e1 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -46,7 +46,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -60,9 +60,9 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index 3dfdd998a92..d29b009f3cf 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -47,9 +47,9 @@ def vigenere(message, key, direction):
             new_index = (index + offset) % len(alphabet)
 --fcc-editable-region--
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 #encryption = vigenere(text, custom_key)
 #print(encryption)
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 330871bc52a..9f1ea94390c 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,9 +45,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 --fcc-editable-region--
 #encryption = vigenere(text, custom_key)
 #print(encryption)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index db2c5bdfe33..adf869e6b5f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index b4b329858a2..8e744b4c09f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index f49b76f417f..cd7e9ce3a58 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -39,7 +39,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -53,7 +53,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index b295655e5c6..a6ecf2194d0 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -38,7 +38,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -52,9 +52,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index e2ec9d01611..d77bcd5d985 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -40,7 +40,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -54,9 +54,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index f9dfeed2c7d..a60afdc14cc 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -53,9 +53,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index fa8531f3421..40bfdb53982 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -48,9 +48,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index aba2d5665d2..822b22f2743 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -46,9 +46,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index a8a4a146373..82df5c7e409 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -70,7 +70,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index 900a42440bf..ceda0450cc8 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -51,7 +51,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index b37f689c14a..c0d946a1d38 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index d863b1b5667..e86470c6c34 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -51,15 +51,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index cee38557012..cb2c9d5e191 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -54,15 +54,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = encrypt(text, custom_key)
 print(encryption)
 decryption = decrypt(encryption, custom_key)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index 7295239a2e5..a2e43552133 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -46,7 +46,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -60,9 +60,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 582c138e1b3..3cfffa05b63 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index fe2c23a64ff..b809b6cc227 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -13,7 +13,7 @@ Call the `print()` function and use the `+` operator to concatenate the `text` v
 
 # --hints--
 
-You should call `print()` and pass `'Encrypted text: ' + text` as the arguments. 
+You should call `print()` and pass `'Encrypted text: ' + text` as the arguments.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--    
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index 95ea421f7cb..bb3bf128cf9 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -52,12 +52,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index e52496dd150..6d5c9a3c856 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -7,7 +7,7 @@ dashedName: step-90
 
 # --description--
 
-In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings. 
+In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings.
 
 Interpolation means writing placeholders that will be replaced by the specified values when the program runs. For example, you can get the same result of `'Encrypted text: ' + text` with `f'Encrypted text: {text}'`. You need to put an `f` before the quotes to create the f-string and write the variables or expressions you want to interpolate between curly braces.
 
@@ -49,12 +49,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index ebdb8b79456..4e28d4737fc 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index 8e107b0fff4..d55577ba1cf 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -47,12 +47,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 0f916bf649e..073dfdcd2bb 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -50,12 +50,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 7b8271ab5ca..006a04850ea 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
@@ -96,12 +96,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 1ea9b8580eb..9a4c27f1945 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -7,8 +7,7 @@ dashedName: step-41
 
 # --description--
 
-Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare.
-They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
+Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare. They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
 
 Python has the following comparison operators:
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 34e53a7cc4f..86a5a8baa9a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -18,7 +18,7 @@ Give your `for` loop a body by adding a call to `print(i)`. Remember to indent t
 
 # --hints--
 
-You should add `print(i)` to your `for` loop body. Pay attention to the indentation. 
+You should add `print(i)` to your `for` loop body. Pay attention to the indentation.
 
 ```js
 assert.match(code, /^for\s+i\s+in\s+text:\s+print\s*\(\s*i\s*\)/m)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index e7886b5f796..042349ee0a4 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -15,7 +15,7 @@ Restore the indentation for your `print(i)` call.
 
 # --hints--
 
-You should indent `print(i)` inside your `for` loop body. 
+You should indent `print(i)` inside your `for` loop body.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index 6215b77a724..f971dfe2276 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -13,7 +13,7 @@ Rename your `i` variable to `char`.
 
 # --hints--
 
-You should replace `i` with `char`. 
+You should replace `i` with `char`.
 
 ```js
 assert.match(code, /^for\s+char\s+in\s+text:\s+print\s*\(\s*char\s*\)/m)
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index 442d9c6cb33..a98c25c7099 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index 71e999219ba..d239d653b25 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65560f9380be92226084ef46.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65560f9380be92226084ef46.md
index 4307d6a022e..9a8a305099b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65560f9380be92226084ef46.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/65560f9380be92226084ef46.md
@@ -11,7 +11,7 @@ In this project, you are going to create a Binary Search Tree (BST). A BST is a
 
 This is what a Binary Search Tree looks like:
 
-<img class="img-responsive center-block" src="https://cdn.freecodecamp.org/curriculum/python/bst-example.png" style="background-color: white; height:500px; width:500px; padding: 10px;">
+<img class="img-responsive center-block" src="https://cdn.freecodecamp.org/curriculum/python/bst-example.png" style="background-color: white; height:500px; width:500px; padding: 10px;" />
 
 Begin by defining an empty `TreeNode` class. The `TreeNode` class represents a node in a binary search tree. Use the `pass` keyword to fill the class body and avoid an error.
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1188d6cfbb0a3ec63c57.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1188d6cfbb0a3ec63c57.md
index ea7008d12f5..584fb9a5d8a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1188d6cfbb0a3ec63c57.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1188d6cfbb0a3ec63c57.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Inside the `__init__` method, initialize the `left` and `right` attributes of the node to `None`. This is because when a node is first created, it doesn't have any left or right children. Remember to use the `self` keyword. 
+Inside the `__init__` method, initialize the `left` and `right` attributes of the node to `None`. This is because when a node is first created, it doesn't have any left or right children. Remember to use the `self` keyword.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a12c2ab0bcc0c2ba30e16.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a12c2ab0bcc0c2ba30e16.md
index ad3d91c513d..e97b5808f71 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a12c2ab0bcc0c2ba30e16.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a12c2ab0bcc0c2ba30e16.md
@@ -27,7 +27,7 @@ class TreeNode:
         self.key = key
         self.left = None
         self.right = None
-        
+
 --fcc-editable-region--
 class BinarySearchTree:
     pass
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a132b56e0160cfeca08d4.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a132b56e0160cfeca08d4.md
index bd1bcdc301c..a43abb0ba7b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a132b56e0160cfeca08d4.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a132b56e0160cfeca08d4.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-Inside the `__init__` method, delete `pass` and initialize an instance attribute called `root` to the value `None`. 
+Inside the `__init__` method, delete `pass` and initialize an instance attribute called `root` to the value `None`.
 
 The `root` attribute represents the root node of the binary search tree. Since this is the constructor when a new `BinarySearchTree` object is created, it starts with an empty tree, so the `root` attribute is set to `None`.
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a13744e82580d7ee3073d.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a13744e82580d7ee3073d.md
index 0bf5aa9f477..3430242863b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a13744e82580d7ee3073d.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a13744e82580d7ee3073d.md
@@ -32,6 +32,6 @@ class BinarySearchTree:
     def __init__(self):
         self.root = None
 
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1479ba7e7c0ee6c1acdd.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1479ba7e7c0ee6c1acdd.md
index 724c23f0faf..e76a4231dbe 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1479ba7e7c0ee6c1acdd.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1479ba7e7c0ee6c1acdd.md
@@ -44,6 +44,6 @@ class BinarySearchTree:
         self.root = self._insert(self.root, key)
 
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a173e5b8adc13b761ed74.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a173e5b8adc13b761ed74.md
index 9d1be56907e..ba33dba43a7 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a173e5b8adc13b761ed74.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a173e5b8adc13b761ed74.md
@@ -52,8 +52,8 @@ class BinarySearchTree:
 
     def search(self, key):
         return self._search(self.root, key)
-        
+
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a227e57aabb25d1f9c987.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a227e57aabb25d1f9c987.md
index 4d8af5046cf..5c7466cecba 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a227e57aabb25d1f9c987.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a227e57aabb25d1f9c987.md
@@ -54,6 +54,6 @@ class BinarySearchTree:
         return node
 
 --fcc-editable-region--
-    
+
 --fcc-editable-region-- 
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
index ec1be7415f5..bf013ae5a23 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
@@ -7,7 +7,7 @@ dashedName: step-25
 
 # --description--
 
-If the second `if` statement is not `True`, it means that the target key is greater than or equal to the current node key. 
+If the second `if` statement is not `True`, it means that the target key is greater than or equal to the current node key.
 
 In a binary search tree, if the target key is greater than the current node's key, the search continues in the right subtree.
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
index 37b354f4ff6..d8b1956ab98 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
@@ -58,6 +58,6 @@ class BinarySearchTree:
             return self._search(node.left, key)
         return self._search(node.right, key)
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a493ab909a96f7c316cd5.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a493ab909a96f7c316cd5.md
index 0324bdcf005..1364496a3f2 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a493ab909a96f7c316cd5.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a493ab909a96f7c316cd5.md
@@ -13,7 +13,7 @@ If the previous condition is met, it means there is no right child. So, return t
 
 # --hints--
 
-You should create an `elif` statement that checks if the right child of the current node is `None`. 
+You should create an `elif` statement that checks if the right child of the current node is `None`.
 
 ```js
 assert.match(code, /elif\s+node\.right\s+is\s+None/);
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
index 1abc6bd2801..d1eb6b34a1d 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
@@ -9,8 +9,7 @@ dashedName: step-37
 
 If neither one of the previous conditions is met, it means the node has both left and right children.
 
-To choose the successor, you need to find the minimum value in the right subtree.
-The smallest value will be the in-order successor of the current node.
+To choose the successor, you need to find the minimum value in the right subtree. The smallest value will be the in-order successor of the current node.
 
 Later on, you are going to define a helper method called `_min_value` that finds the smallest value in a given subtree.
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a51a705c97d7a9294ab2a.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a51a705c97d7a9294ab2a.md
index 35a339c8923..22a42efe6fe 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a51a705c97d7a9294ab2a.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a51a705c97d7a9294ab2a.md
@@ -7,8 +7,7 @@ dashedName: step-40
 
 # --description--
 
-When the node you want to delete has two children, you need to choose the replacement node from the children. 
-The in-order successor method chooses the smallest element from the right subtree and places that element in place of the deleted node.
+When the node you want to delete has two children, you need to choose the replacement node from the children. The in-order successor method chooses the smallest element from the right subtree and places that element in place of the deleted node.
 
 Define the `_min_value` method and give it two parameters: `self` and `node`.
 
@@ -78,6 +77,6 @@ class BinarySearchTree:
             node.right = self._delete(node.right, node.key)
         return node
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a536e99be288210f01451.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a536e99be288210f01451.md
index 04a6eb28175..e2cf972f28f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a536e99be288210f01451.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a536e99be288210f01451.md
@@ -84,6 +84,6 @@ class BinarySearchTree:
             node = node.left
         return node.key
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
index de22b90ce88..676f1d70d0d 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
@@ -84,6 +84,6 @@ class BinarySearchTree:
         self._inorder_traversal(self.root, result)
         return result
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
index 47c809f05c6..f0878d8e559 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
@@ -31,7 +31,7 @@ class TreeNode:
         self.right = None
 
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 
 class BinarySearchTree:
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/arithmetic-formatter.md b/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/arithmetic-formatter.md
index 232fdf3cc95..0bba0f81312 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/arithmetic-formatter.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/arithmetic-formatter.md
@@ -10,9 +10,9 @@ dashedName: arithmetic-formatter
 
 You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-arithmetic-formatter" target="_blank" rel="noopener noreferrer nofollow"> working on this project with our Replit starter code</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 
 # --instructions--
@@ -64,14 +64,10 @@ The function will return the correct conversion if the supplied problems are pro
 
 
 - Situations that will return an error:
-  - If there are **too many problems** supplied to the function. The limit is **five**, anything more will return:
-    `Error: Too many problems.`
-  - The appropriate operators the function will accept are **addition** and **subtraction**. Multiplication and division will return an error. Other operators not mentioned in this bullet point will not need to be tested. The error returned will be:
-    `Error: Operator must be '+' or '-'.`
-  - Each number (operand) should only contain digits. Otherwise, the function will return:
-    `Error: Numbers must only contain digits.`
-  - Each operand (aka number on each side of the operator) has a max of four digits in width. Otherwise, the error string returned will be:
-    `Error: Numbers cannot be more than four digits.`
+  - If there are **too many problems** supplied to the function. The limit is **five**, anything more will return: `Error: Too many problems.`
+  - The appropriate operators the function will accept are **addition** and **subtraction**. Multiplication and division will return an error. Other operators not mentioned in this bullet point will not need to be tested. The error returned will be: `Error: Operator must be '+' or '-'.`
+  - Each number (operand) should only contain digits. Otherwise, the function will return: `Error: Numbers must only contain digits.`
+  - Each operand (aka number on each side of the operator) has a max of four digits in width. Otherwise, the error string returned will be: `Error: Numbers cannot be more than four digits.`
 - If the user supplied the correct format of problems, the conversion you return will follow these rules:
   - There should be a single space between the operator and the longest of the two operands, the operator will be on the same line as the second operand, both operands will be in the same order as provided (the first will be the top one and the second will be the bottom).
   - Numbers should be right-aligned.
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/budget-app.md b/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/budget-app.md
index 941e681c22c..e61a1e7566f 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/budget-app.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/budget-app.md
@@ -10,9 +10,9 @@ dashedName: budget-app
 
 You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-budget-app" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 
 # --instructions--
@@ -80,7 +80,7 @@ The unit tests for this project are in `test_module.py`.
 
 Write your code in `budget.py`. For development, you can use `main.py` to test your `Category` class. Click the "run" button and `main.py` will run.
 
-## Testing 
+## Testing
 
 We imported the tests from `test_module.py` to `main.py` for your convenience. The tests will run automatically whenever you hit the "run" button.
 
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/polygon-area-calculator.md b/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/polygon-area-calculator.md
index 5fcccbd2d4b..97e39369a48 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/polygon-area-calculator.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/polygon-area-calculator.md
@@ -10,9 +10,9 @@ dashedName: polygon-area-calculator
 
 You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-polygon-area-calculator" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 
 # --instructions--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/probability-calculator.md b/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/probability-calculator.md
index 33bb3dd35b9..aa3714d589b 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/probability-calculator.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/probability-calculator.md
@@ -10,9 +10,9 @@ dashedName: probability-calculator
 
 You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-probability-calculator" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 
 # --instructions--
diff --git a/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/time-calculator.md b/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/time-calculator.md
index 015b9e343f4..085df00550a 100644
--- a/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/time-calculator.md
+++ b/curriculum/challenges/korean/07-scientific-computing-with-python/scientific-computing-with-python-projects/time-calculator.md
@@ -8,11 +8,11 @@ dashedName: time-calculator
 
 # --description--
 
-You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-time-calculator" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>. 
+You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-time-calculator" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 # --instructions--
 
diff --git a/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/demographic-data-analyzer.md b/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/demographic-data-analyzer.md
index 052ba4bde55..929a37f7f69 100644
--- a/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/demographic-data-analyzer.md
+++ b/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/demographic-data-analyzer.md
@@ -10,9 +10,9 @@ dashedName: demographic-data-analyzer
 
 You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-demographic-data-analyzer" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 
 We are still developing the interactive instructional part of the Python curriculum. For now, here are some videos on the freeCodeCamp.org YouTube channel that will teach you everything you need to know to complete this project:
diff --git a/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/mean-variance-standard-deviation-calculator.md b/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/mean-variance-standard-deviation-calculator.md
index 0dc2fd0472b..a668093a086 100644
--- a/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/mean-variance-standard-deviation-calculator.md
+++ b/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/mean-variance-standard-deviation-calculator.md
@@ -8,11 +8,11 @@ dashedName: mean-variance-standard-deviation-calculator
 
 # --description--
 
-You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-mean-variance-standard-deviation-calculator" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>. 
+You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-mean-variance-standard-deviation-calculator" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 
 We are still developing the interactive instructional part of the Python curriculum. For now, here are some videos on the freeCodeCamp.org YouTube channel that will teach you everything you need to know to complete this project:
diff --git a/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/medical-data-visualizer.md b/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/medical-data-visualizer.md
index b0afa419906..151e55bfc4c 100644
--- a/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/medical-data-visualizer.md
+++ b/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/medical-data-visualizer.md
@@ -10,9 +10,9 @@ dashedName: medical-data-visualizer
 
 You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-medical-data-visualizer" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 
 We are still developing the interactive instructional part of the Python curriculum. For now, here are some videos on the freeCodeCamp.org YouTube channel that will teach you everything you need to know to complete this project:
@@ -31,20 +31,20 @@ The rows in the dataset represent patients and the columns represent information
 
 File name: medical_examination.csv
 
-| Feature | Variable Type | Variable      | Value Type |
-|:-------:|:------------:|:-------------:|:----------:|
-| Age | Objective Feature | `age` | int (days) |
-| Height | Objective Feature | `height` | int (cm) |
-| Weight | Objective Feature | `weight` | float (kg) |
-| Gender | Objective Feature | `gender` | categorical code |
-| Systolic blood pressure | Examination Feature | `ap_hi` | int |
-| Diastolic blood pressure | Examination Feature | `ap_lo` | int |
-| Cholesterol | Examination Feature | `cholesterol` | 1: normal, 2: above normal, 3: well above normal |
-| Glucose | Examination Feature | `gluc` | 1: normal, 2: above normal, 3: well above normal |
-| Smoking | Subjective Feature | `smoke` | binary |
-| Alcohol intake | Subjective Feature | `alco` | binary |
-| Physical activity | Subjective Feature | `active` | binary |
-| Presence or absence of cardiovascular disease | Target Variable | `cardio` | binary |
+|                    Feature                    |    Variable Type    |   Variable    |                    Value Type                    |
+|:---------------------------------------------:|:-------------------:|:-------------:|:------------------------------------------------:|
+|                      Age                      |  Objective Feature  |     `age`     |                    int (days)                    |
+|                    Height                     |  Objective Feature  |   `height`    |                     int (cm)                     |
+|                    Weight                     |  Objective Feature  |   `weight`    |                    float (kg)                    |
+|                    Gender                     |  Objective Feature  |   `gender`    |                 categorical code                 |
+|            Systolic blood pressure            | Examination Feature |    `ap_hi`    |                       int                        |
+|           Diastolic blood pressure            | Examination Feature |    `ap_lo`    |                       int                        |
+|                  Cholesterol                  | Examination Feature | `cholesterol` | 1: normal, 2: above normal, 3: well above normal |
+|                    Glucose                    | Examination Feature |    `gluc`     | 1: normal, 2: above normal, 3: well above normal |
+|                    Smoking                    | Subjective Feature  |    `smoke`    |                      binary                      |
+|                Alcohol intake                 | Subjective Feature  |    `alco`     |                      binary                      |
+|               Physical activity               | Subjective Feature  |   `active`    |                      binary                      |
+| Presence or absence of cardiovascular disease |   Target Variable   |   `cardio`    |                      binary                      |
 
 ## Tasks
 
diff --git a/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/page-view-time-series-visualizer.md b/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/page-view-time-series-visualizer.md
index 26a070fab0c..47941f0fa08 100644
--- a/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/page-view-time-series-visualizer.md
+++ b/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/page-view-time-series-visualizer.md
@@ -10,9 +10,9 @@ dashedName: page-view-time-series-visualizer
 
 You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-page-view-time-series-visualizer" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 
 We are still developing the interactive instructional part of the Python curriculum. For now, here are some videos on the freeCodeCamp.org YouTube channel that will teach you everything you need to know to complete this project:
diff --git a/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/sea-level-predictor.md b/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/sea-level-predictor.md
index b7780a9ec12..777512ea22f 100644
--- a/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/sea-level-predictor.md
+++ b/curriculum/challenges/korean/08-data-analysis-with-python/data-analysis-with-python-projects/sea-level-predictor.md
@@ -10,9 +10,9 @@ dashedName: sea-level-predictor
 
 You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-sea-level-predictor" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 
 We are still developing the interactive instructional part of the Python curriculum. For now, here are some videos on the freeCodeCamp.org YouTube channel that will teach you everything you need to know to complete this project:
@@ -50,6 +50,7 @@ We imported the tests from `test_module.py` to `main.py` for your convenience. T
 Copy your project's URL and submit it to freeCodeCamp.
 
 ## Data Source
+
 <a href="https://datahub.io/core/sea-level-rise" target="_blank" rel="noopener noreferrer nofollow">Global Average Absolute Sea Level Change</a>, 1880-2014 from the US Environmental Protection Agency using data from CSIRO, 2015; NOAA, 2015.
 
 
diff --git a/curriculum/challenges/korean/08-data-analysis-with-python/numpy/basics-of-numpy.md b/curriculum/challenges/korean/08-data-analysis-with-python/numpy/basics-of-numpy.md
index 7a4a17909b1..99e45e4571b 100644
--- a/curriculum/challenges/korean/08-data-analysis-with-python/numpy/basics-of-numpy.md
+++ b/curriculum/challenges/korean/08-data-analysis-with-python/numpy/basics-of-numpy.md
@@ -14,7 +14,7 @@ dashedName: basics-of-numpy
 
 ## --text--
 
-What will the following code print?
+다음 코드는 무엇을 출력하나요?
 
 ```python
 b = np.array([[1.0,2.0,3.0],[3.0,4.0,5.0]])
diff --git a/curriculum/challenges/korean/08-data-analysis-with-python/numpy/initializing-different-arrays.md b/curriculum/challenges/korean/08-data-analysis-with-python/numpy/initializing-different-arrays.md
index debbf356d30..619830e674e 100644
--- a/curriculum/challenges/korean/08-data-analysis-with-python/numpy/initializing-different-arrays.md
+++ b/curriculum/challenges/korean/08-data-analysis-with-python/numpy/initializing-different-arrays.md
@@ -14,7 +14,7 @@ dashedName: initializing-different-arrays
 
 ## --text--
 
-What will the following code print?
+다음 코드는 무엇을 출력하나요?
 
 ```py
 a = np.array([[1, 2, 3, 4, 5], [6, 7, 8, 9, 10]])
diff --git a/curriculum/challenges/korean/09-information-security/information-security-projects/anonymous-message-board.md b/curriculum/challenges/korean/09-information-security/information-security-projects/anonymous-message-board.md
index fc060f4510e..f219e784a77 100644
--- a/curriculum/challenges/korean/09-information-security/information-security-projects/anonymous-message-board.md
+++ b/curriculum/challenges/korean/09-information-security/information-security-projects/anonymous-message-board.md
@@ -18,9 +18,9 @@ Working on this project will involve you writing your code using one of the foll
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. Optionally, also submit a link to your project's source code in the GitHub Link field.
 
@@ -274,7 +274,7 @@ async (getUserInput) => {
   let res = await fetch(`${url}/api/threads/fcc_test`);
   let threads = await res.json();
   const thread_id = threads[0]._id;
-  
+
   const reply_data = { thread_id, text: "fcc_test_reply", delete_password: "delete_me" };
   await fetch(`${url}/api/replies/fcc_test`, {
     method: 'POST',
@@ -321,7 +321,7 @@ async (getUserInput) => {
   const threads = await res.json();
   const thread_id = threads[0]._id;
   const data = { thread_id };
-  
+
   res = await fetch(`${url}/api/threads/fcc_test`, {
     method: 'PUT',
     headers: { 'Content-Type': 'application/json' },
@@ -353,7 +353,7 @@ async (getUserInput) => {
   const thread_id = threads[0]._id;
   const reply_id = threads[0].replies[0]._id;
   const data = { thread_id, reply_id };
-  
+
   res = await fetch(`${url}/api/replies/fcc_test`, {
     method: 'PUT',
     headers: { 'Content-Type': 'application/json' },
diff --git a/curriculum/challenges/korean/09-information-security/information-security-projects/port-scanner.md b/curriculum/challenges/korean/09-information-security/information-security-projects/port-scanner.md
index 32a7ef2e06c..dd4153297d2 100644
--- a/curriculum/challenges/korean/09-information-security/information-security-projects/port-scanner.md
+++ b/curriculum/challenges/korean/09-information-security/information-security-projects/port-scanner.md
@@ -9,11 +9,11 @@ dashedName: port-scanner
 
 # --description--
 
-You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-port-scanner" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>. 
+You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-port-scanner" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 
 We are still developing the interactive instructional part of the Python curriculum. For now, here are some videos on the freeCodeCamp.org YouTube channel that will teach you everything you need to know to complete this project:
diff --git a/curriculum/challenges/korean/09-information-security/information-security-projects/secure-real-time-multiplayer-game.md b/curriculum/challenges/korean/09-information-security/information-security-projects/secure-real-time-multiplayer-game.md
index e0be1176a5b..361ebe837ea 100644
--- a/curriculum/challenges/korean/09-information-security/information-security-projects/secure-real-time-multiplayer-game.md
+++ b/curriculum/challenges/korean/09-information-security/information-security-projects/secure-real-time-multiplayer-game.md
@@ -16,9 +16,9 @@ Develop a 2D real time multiplayer game using the HTML Canvas API and Socket.io
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. Optionally, also submit a link to your project's source code in the GitHub Link field.
 
diff --git a/curriculum/challenges/korean/09-information-security/information-security-projects/sha-1-password-cracker.md b/curriculum/challenges/korean/09-information-security/information-security-projects/sha-1-password-cracker.md
index e20e0878522..ac415095fb7 100644
--- a/curriculum/challenges/korean/09-information-security/information-security-projects/sha-1-password-cracker.md
+++ b/curriculum/challenges/korean/09-information-security/information-security-projects/sha-1-password-cracker.md
@@ -11,9 +11,9 @@ dashedName: sha-1-password-cracker
 
 You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-SHA-1-password-cracker" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 
 We are still developing the interactive instructional part of the Python curriculum. For now, here are some videos on the freeCodeCamp.org YouTube channel that will teach you everything you need to know to complete this project:
diff --git a/curriculum/challenges/korean/09-information-security/information-security-projects/stock-price-checker.md b/curriculum/challenges/korean/09-information-security/information-security-projects/stock-price-checker.md
index c5d05a7dee4..08b61006de7 100644
--- a/curriculum/challenges/korean/09-information-security/information-security-projects/stock-price-checker.md
+++ b/curriculum/challenges/korean/09-information-security/information-security-projects/stock-price-checker.md
@@ -20,9 +20,9 @@ Working on this project will involve you writing your code using one of the foll
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field. Optionally, also submit a link to your project's source code in the GitHub Link field.
 
diff --git a/curriculum/challenges/korean/09-information-security/information-security-with-helmetjs/install-and-require-helmet.md b/curriculum/challenges/korean/09-information-security/information-security-with-helmetjs/install-and-require-helmet.md
index 53a4ac70f07..172f70d0c97 100644
--- a/curriculum/challenges/korean/09-information-security/information-security-with-helmetjs/install-and-require-helmet.md
+++ b/curriculum/challenges/korean/09-information-security/information-security-with-helmetjs/install-and-require-helmet.md
@@ -16,9 +16,9 @@ Working on these challenges will involve you writing your code using one of the
 
 If you use Replit, follow these steps to set up the project:
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the Solution Link field.
 
diff --git a/curriculum/challenges/korean/09-information-security/information-security-with-helmetjs/mitigate-the-risk-of-cross-site-scripting-xss-attacks-with-helmet.xssfilter.md b/curriculum/challenges/korean/09-information-security/information-security-with-helmetjs/mitigate-the-risk-of-cross-site-scripting-xss-attacks-with-helmet.xssfilter.md
index f2f28e0aa83..2ec2f36fb95 100644
--- a/curriculum/challenges/korean/09-information-security/information-security-with-helmetjs/mitigate-the-risk-of-cross-site-scripting-xss-attacks-with-helmet.xssfilter.md
+++ b/curriculum/challenges/korean/09-information-security/information-security-with-helmetjs/mitigate-the-risk-of-cross-site-scripting-xss-attacks-with-helmet.xssfilter.md
@@ -1,8 +1,7 @@
 ---
 id: 587d8247367417b2b2512c39
 title: >-
-  Mitigate the Risk of Cross Site Scripting (XSS) Attacks with
-  helmet.xssFilter()
+  Mitigate the Risk of Cross Site Scripting (XSS) Attacks with helmet.xssFilter()
 challengeType: 2
 forumTopicId: 301583
 dashedName: mitigate-the-risk-of-cross-site-scripting-xss-attacks-with-helmet-xssfilter
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/add-a-new-element-to-a-binary-search-tree.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/add-a-new-element-to-a-binary-search-tree.md
index 7b31d32db53..58cc1763d59 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/add-a-new-element-to-a-binary-search-tree.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/add-a-new-element-to-a-binary-search-tree.md
@@ -145,7 +145,7 @@ function Node(value) {
 function BinarySearchTree() {
   this.root = null;
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/check-if-an-element-is-present-in-a-binary-search-tree.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/check-if-an-element-is-present-in-a-binary-search-tree.md
index e45bd5a51aa..03daa65cb23 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/check-if-an-element-is-present-in-a-binary-search-tree.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/check-if-an-element-is-present-in-a-binary-search-tree.md
@@ -145,7 +145,7 @@ function Node(value) {
 function BinarySearchTree() {
   this.root = null;
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/check-if-binary-search-tree.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/check-if-binary-search-tree.md
index 4a6f0bb9b5c..db3165a4b73 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/check-if-binary-search-tree.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/check-if-binary-search-tree.md
@@ -107,7 +107,7 @@ function BinarySearchTree() {
 }
 function isBinarySearchTree(tree) {
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-doubly-linked-list.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-doubly-linked-list.md
index 46ba6082670..b9f3f12d767 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-doubly-linked-list.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-doubly-linked-list.md
@@ -160,7 +160,7 @@ assert(
 DoublyLinkedList.prototype = Object.assign(
   DoublyLinkedList.prototype,
   {
-  
+
   print() {
     if (this.head == null) {
       return null;
@@ -204,7 +204,7 @@ var DoublyLinkedList = function() {
   this.head = null;
   this.tail = null;
   // Only change code below this line
-  
+
   // Only change code above this line
 };
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-hash-table.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-hash-table.md
index af26da6ba50..035733ac109 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-hash-table.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-hash-table.md
@@ -210,7 +210,7 @@ var hash = string => {
 var HashTable = function() {
   this.collection = {};
   // Only change code below this line
-  
+
   // Only change code above this line
 };
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-map-data-structure.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-map-data-structure.md
index 25d99a18438..f02202cc5f9 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-map-data-structure.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-map-data-structure.md
@@ -158,7 +158,7 @@ assert(
 var Map = function() {
   this.collection = {};
   // Only change code below this line
-  
+
   // Only change code above this line
 };
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-set-class.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-set-class.md
index 8dae14f7644..d818be6a807 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-set-class.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-set-class.md
@@ -170,7 +170,7 @@ class Set {
   }
 
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-trie-search-tree.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-trie-search-tree.md
index c6c56bfcc07..b1495efd441 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-trie-search-tree.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-a-trie-search-tree.md
@@ -139,7 +139,7 @@ var Node = function() {
 };
 var Trie = function() {
   // Only change code below this line
-  
+
   // Only change code above this line
 };
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-an-es6-javascript-map.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-an-es6-javascript-map.md
index 8e895d9b218..02bcedd36db 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-an-es6-javascript-map.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/create-an-es6-javascript-map.md
@@ -8,14 +8,14 @@ dashedName: create-an-es6-javascript-map
 
 # --description--
 
-The new version of JavaScript provides us with a built-in Map object which provides much of the functionality we wrote by hand in the last challenge. This Map object, although similar to regular JavaScript objects, provides some useful functionality that normal objects lack. For example, an ES6 Map tracks the insertion order of items that are added to it. Here is a more complete overview of its methods: 
+The new version of JavaScript provides us with a built-in Map object which provides much of the functionality we wrote by hand in the last challenge. This Map object, although similar to regular JavaScript objects, provides some useful functionality that normal objects lack. For example, an ES6 Map tracks the insertion order of items that are added to it. Here is a more complete overview of its methods:
 
-- `.has(key)` returns true or false based on the presence of a key 
-- `.get(key)` returns the value associated with a key 
-- `.set(key, value)` sets a new key, value pair 
-- `.delete(key)` removes a key, value pair 
-- `.clear()` removes all key, value pairs 
-- `.entries()` returns an array of all the keys in insertion order 
+- `.has(key)` returns true or false based on the presence of a key
+- `.get(key)` returns the value associated with a key
+- `.set(key, value)` sets a new key, value pair
+- `.delete(key)` removes a key, value pair
+- `.clear()` removes all key, value pairs
+- `.entries()` returns an array of all the keys in insertion order
 - `.values()` returns an array of all the values in insertion order
 
 # --instructions--
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/depth-first-search.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/depth-first-search.md
index 4467b7eeba1..d03cf5a4b33 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/depth-first-search.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/depth-first-search.md
@@ -16,7 +16,7 @@ Once it reaches one end of a path, the search will backtrack to the last node wi
 
 The animation below shows how the algorithm works. The algorithm starts with the top node and visits the nodes in the numbered order.
 
-<img class='img-responsive' src='https://camo.githubusercontent.com/aaad9e39961daf34d967c616edeb50abf3bf1235/68747470733a2f2f75706c6f61642e77696b696d656469612e6f72672f77696b6970656469612f636f6d6d6f6e732f372f37662f44657074682d46697273742d5365617263682e676966'>
+<img class='img-responsive' src='https://camo.githubusercontent.com/aaad9e39961daf34d967c616edeb50abf3bf1235/68747470733a2f2f75706c6f61642e77696b696d656469612e6f72672f77696b6970656469612f636f6d6d6f6e732f372f37662f44657074682d46697273742d5365617263682e676966' />
 
 Notice how, unlike breadth-first search, every time a node is visited, it doesn't visit all of its neighbors. Instead, it first visits one of its neighbors and continues down that path until there are no more nodes to be visited on that path.
 
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/find-the-minimum-and-maximum-height-of-a-binary-search-tree.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/find-the-minimum-and-maximum-height-of-a-binary-search-tree.md
index b049822d4ad..eb71f5ea47f 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/find-the-minimum-and-maximum-height-of-a-binary-search-tree.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/find-the-minimum-and-maximum-height-of-a-binary-search-tree.md
@@ -261,7 +261,7 @@ function Node(value) {
 function BinarySearchTree() {
   this.root = null;
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 ```
@@ -278,7 +278,7 @@ function Node(value) {
 function BinarySearchTree() {
   this.root = null;
   // Only change code below this line
-  
+
   // Only change code above this line
   this.findMinHeight = function(root = this.root) {
     // empty tree.
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/find-the-minimum-and-maximum-value-in-a-binary-search-tree.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/find-the-minimum-and-maximum-value-in-a-binary-search-tree.md
index 590820dd490..23077f9d938 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/find-the-minimum-and-maximum-value-in-a-binary-search-tree.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/find-the-minimum-and-maximum-value-in-a-binary-search-tree.md
@@ -187,7 +187,7 @@ function Node(value) {
 function BinarySearchTree() {
   this.root = null;
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/implement-heap-sort-with-a-min-heap.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/implement-heap-sort-with-a-min-heap.md
index 01a5a15780c..efc98e7be70 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/implement-heap-sort-with-a-min-heap.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/implement-heap-sort-with-a-min-heap.md
@@ -125,14 +125,14 @@ function createRandomArray(size = 5){
   let a = new Array(size);
   for(let i = 0; i < size; i++)
     a[i] = Math.floor(Math.random() * 100);
-  
+
   return a;
 }
 const array = createRandomArray(25);
 
 var MinHeap = function() {
   // Only change code below this line
-  
+
   // Only change code above this line
 };
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/insert-an-element-into-a-max-heap.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/insert-an-element-into-a-max-heap.md
index 6492f8bdc37..3528a99be9a 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/insert-an-element-into-a-max-heap.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/insert-an-element-into-a-max-heap.md
@@ -127,7 +127,7 @@ assert(
 ```js
 var MaxHeap = function() {
   // Only change code below this line
-    
+
   // Only change code above this line
 };
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/invert-a-binary-tree.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/invert-a-binary-tree.md
index bb2226fac89..8be38b0d5d8 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/invert-a-binary-tree.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/invert-a-binary-tree.md
@@ -160,7 +160,7 @@ function Node(value) {
 function BinarySearchTree() {
   this.root = null;
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/perform-a-difference-on-two-sets-of-data.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/perform-a-difference-on-two-sets-of-data.md
index 8c40ae51616..1c793291283 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/perform-a-difference-on-two-sets-of-data.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/perform-a-difference-on-two-sets-of-data.md
@@ -124,7 +124,7 @@ class Set {
     return newSet;
   }
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/perform-a-subset-check-on-two-sets-of-data.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/perform-a-subset-check-on-two-sets-of-data.md
index ae49ebc0be8..3c099ab1d33 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/perform-a-subset-check-on-two-sets-of-data.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/perform-a-subset-check-on-two-sets-of-data.md
@@ -200,7 +200,7 @@ class Set {
     return newSet;
   }
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/perform-an-intersection-on-two-sets-of-data.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/perform-an-intersection-on-two-sets-of-data.md
index e2bef363771..a108cb3b4ee 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/perform-an-intersection-on-two-sets-of-data.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/perform-an-intersection-on-two-sets-of-data.md
@@ -101,7 +101,7 @@ class Set {
     return newSet;
   }
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/remove-elements-from-a-linked-list.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/remove-elements-from-a-linked-list.md
index 871cf51e9d9..a202036ff08 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/remove-elements-from-a-linked-list.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/remove-elements-from-a-linked-list.md
@@ -194,7 +194,7 @@ function LinkedList() {
       previous = currentNode;
       currentNode = currentNode.next;
     }
-    
+
     if (currentNode.next === null && currentNode.element !== element) {
       return;
     }
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/reverse-a-doubly-linked-list.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/reverse-a-doubly-linked-list.md
index 0f3876daf49..c26c4677db7 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/reverse-a-doubly-linked-list.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/reverse-a-doubly-linked-list.md
@@ -165,7 +165,7 @@ var DoublyLinkedList = function() {
   this.head = null;
   this.tail = null;
   // Only change code below this line
-  
+
   // Only change code above this line
 };
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/use-breadth-first-search-in-a-binary-search-tree.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/use-breadth-first-search-in-a-binary-search-tree.md
index d048a3a43cb..b02f10043d3 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/use-breadth-first-search-in-a-binary-search-tree.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/use-breadth-first-search-in-a-binary-search-tree.md
@@ -214,7 +214,7 @@ function Node(value) {
 function BinarySearchTree() {
   this.root = null;
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 ```
diff --git a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/use-depth-first-search-in-a-binary-search-tree.md b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/use-depth-first-search-in-a-binary-search-tree.md
index 8dc78340bfe..c03fb750777 100644
--- a/curriculum/challenges/korean/10-coding-interview-prep/data-structures/use-depth-first-search-in-a-binary-search-tree.md
+++ b/curriculum/challenges/korean/10-coding-interview-prep/data-structures/use-depth-first-search-in-a-binary-search-tree.md
@@ -278,7 +278,7 @@ function Node(value) {
 function BinarySearchTree() {
   this.root = null;
   // Only change code below this line
-  
+
   // Only change code above this line
 }
 ```
diff --git a/curriculum/challenges/korean/11-machine-learning-with-python/machine-learning-with-python-projects/cat-and-dog-image-classifier.md b/curriculum/challenges/korean/11-machine-learning-with-python/machine-learning-with-python-projects/cat-and-dog-image-classifier.md
index f4b640d4768..f43cc60a47c 100644
--- a/curriculum/challenges/korean/11-machine-learning-with-python/machine-learning-with-python-projects/cat-and-dog-image-classifier.md
+++ b/curriculum/challenges/korean/11-machine-learning-with-python/machine-learning-with-python-projects/cat-and-dog-image-classifier.md
@@ -62,7 +62,7 @@ The `plotImages` function will be used a few times to plot images. It takes an a
 
 ## Cell 5
 
-Recreate the `train_image_generator` using `ImageDataGenerator`. 
+Recreate the `train_image_generator` using `ImageDataGenerator`.
 
 Since there are a small number of training examples, there is a risk of overfitting. One way to fix this problem is by creating more training data from existing training examples by using random transformations.
 
@@ -90,7 +90,7 @@ Run this cell to visualize the accuracy and loss of the model.
 
 Now it is time to use your model to predict whether a brand new image is a cat or a dog.
 
-In this cell, get the probability that each test image (from `test_data_gen`) is a dog or a cat. `probabilities` should be a list of integers. 
+In this cell, get the probability that each test image (from `test_data_gen`) is a dog or a cat. `probabilities` should be a list of integers.
 
 Call the `plotImages` function and pass in the test images and the probabilities corresponding to each test image.
 
diff --git a/curriculum/challenges/korean/11-machine-learning-with-python/machine-learning-with-python-projects/rock-paper-scissors.md b/curriculum/challenges/korean/11-machine-learning-with-python/machine-learning-with-python-projects/rock-paper-scissors.md
index 67c1fa2b87d..47c91916b82 100644
--- a/curriculum/challenges/korean/11-machine-learning-with-python/machine-learning-with-python-projects/rock-paper-scissors.md
+++ b/curriculum/challenges/korean/11-machine-learning-with-python/machine-learning-with-python-projects/rock-paper-scissors.md
@@ -12,9 +12,9 @@ For this challenge, you will create a program to play Rock, Paper, Scissors. A p
 
 You will be <a href="https://replit.com/github/freeCodeCamp/boilerplate-rock-paper-scissors" target="_blank" rel="noopener noreferrer nofollow">working on this project with our Replit starter code</a>.
 
--   Start by importing the project on Replit. 
--   Next, you will see a `.replit` window. 
--   Select `Use run command` and click the `Done` button. 
+-   Start by importing the project on Replit.
+-   Next, you will see a `.replit` window.
+-   Select `Use run command` and click the `Done` button.
 
 We are still developing the interactive instructional part of the machine learning curriculum. For now, you will have to use other resources to learn how to pass this challenge.
 
@@ -30,7 +30,7 @@ The file `RPS.py` shows an example function that you will need to update. The ex
 
 ## Development
 
-Do not modify `RPS_game.py`. Write all your code in `RPS.py`. For development, you can use `main.py` to test your code. 
+Do not modify `RPS_game.py`. Write all your code in `RPS.py`. For development, you can use `main.py` to test your code.
 
 `main.py` imports the game function and bots from `RPS_game.py`.
 
@@ -52,7 +52,7 @@ play(player, quincy, 1000, verbose=True)
 
 Click the "run" button and `main.py` will run.
 
-## Testing 
+## Testing
 
 The unit tests for this project are in `test_module.py`. We imported the tests from `test_module.py` to `main.py` for your convenience. If you uncomment the last line in `main.py`, the tests will run automatically whenever you hit the "run" button.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/build-a-product-landing-page-project/build-a-product-landing-page.md b/curriculum/challenges/korean/14-responsive-web-design-22/build-a-product-landing-page-project/build-a-product-landing-page.md
index 26774e944a9..d55a1223154 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/build-a-product-landing-page-project/build-a-product-landing-page.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/build-a-product-landing-page-project/build-a-product-landing-page.md
@@ -212,7 +212,7 @@ Your `#nav-bar` should always be at the top of the viewport.
   const header = document.getElementById('header');
   const headerChildren = header.children;
   const navbarCandidates = [header, ...headerChildren];
-  
+
   // Return smallest top position of all navbar candidates
   const getNavbarPosition = (candidates = []) => {
     return candidates.reduce(
@@ -238,7 +238,7 @@ Your `#nav-bar` should always be at the top of the viewport.
     '#header or one of its children should be at the top of the ' +
       'viewport even after scrolling '
   );
-    
+
   window.scroll(0, 0);
 })();
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/build-a-tribute-page-project/build-a-tribute-page.md b/curriculum/challenges/korean/14-responsive-web-design-22/build-a-tribute-page-project/build-a-tribute-page.md
index ac64fa9e1e5..ea9426341c0 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/build-a-tribute-page-project/build-a-tribute-page.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/build-a-tribute-page-project/build-a-tribute-page.md
@@ -208,12 +208,12 @@ assert(leftMargin - rightMargin < 6 && rightMargin - leftMargin < 6)
     <link
       href="https://fonts.googleapis.com/css?family=Pacifico"
       rel="stylesheet"
-     
+
     />
     <link
       href="https://fonts.googleapis.com/css?family=Lobster"
       rel="stylesheet"
-     
+
     />
     <link href="styles.css" rel="stylesheet" />
     <title>Tribute Page</title>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6133d11ef548f51f876149e3.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6133d11ef548f51f876149e3.md
index c04e0afa0c0..2df4f7babe3 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6133d11ef548f51f876149e3.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6133d11ef548f51f876149e3.md
@@ -51,7 +51,7 @@ assert.exists(document.querySelector('header + main'));
   </head>
 --fcc-editable-region--
   <body>
-    
+
   </body>
 --fcc-editable-region--
 </html>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/613e275749ebd008e74bb62e.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/613e275749ebd008e74bb62e.md
index 7c99699c35b..30b6d8ebf5c 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/613e275749ebd008e74bb62e.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/613e275749ebd008e74bb62e.md
@@ -9,7 +9,7 @@ dashedName: step-8
 
 A useful property of an _SVG_ (scalable vector graphics) is that it contains a `path` attribute which allows the image to be scaled without affecting the resolution of the resultant image.
 
-Currently, the `img` is assuming its default size, which is too large. CSS has a `max` function which returns the largest of a set of comma-separated values. For example:
+Currently, the `img` is assuming its default size, which is too large. CSS has a `max` function which returns the largest of a set of comma-separated values. 예시:
 
 ```css
 img {
@@ -17,9 +17,9 @@ img {
 }
 ```
 
-In this example, `img` elements will have a minimum width of `250px`. And as the viewport grows, the image will grow accordingly to be 25 percent of the viewport width. 
+In this example, `img` elements will have a minimum width of `250px`. And as the viewport grows, the image will grow accordingly to be 25 percent of the viewport width.
 
-Scale the image using its `id` as a selector, and setting the `width` to be the maximum of `100px` or `18vw`. 
+Scale the image using its `id` as a selector, and setting the `width` to be the maximum of `100px` or `18vw`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6143610161323a081b249c19.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6143610161323a081b249c19.md
index d37386d6f5f..90bcacd4596 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6143610161323a081b249c19.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6143610161323a081b249c19.md
@@ -107,7 +107,7 @@ assert.exists(document.querySelectorAll('h2#student-info ~ div')?.[2]?.querySele
 --fcc-editable-region--
         <section role="region" aria-labelledby="student-info">
           <h2 id="student-info">Student Info</h2>
-          
+
         </section>
 --fcc-editable-region--
         <section role="region" aria-labelledby="html-questions">
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6143956ed76ed60e012faa51.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6143956ed76ed60e012faa51.md
index 7360397c776..a363e31297d 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6143956ed76ed60e012faa51.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6143956ed76ed60e012faa51.md
@@ -7,7 +7,7 @@ dashedName: step-25
 
 # --description--
 
-The `.sr-only` text is still visible. There is a common pattern to visually hide text for only screen readers to read. 
+The `.sr-only` text is still visible. There is a common pattern to visually hide text for only screen readers to read.
 
 This pattern is to set the following CSS properties:
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6145f14f019a4b0adb94b051.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6145f14f019a4b0adb94b051.md
index 0abee6538ad..35c345818e3 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6145f14f019a4b0adb94b051.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6145f14f019a4b0adb94b051.md
@@ -167,7 +167,7 @@ assert.isTrue(document.querySelector('div.answer > select')?.required);
             </div>
 --fcc-editable-region--
             <div class="answer">
-              
+
             </div>
 --fcc-editable-region--
             <div class="question-block">
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6145f47393fbe70c4d885f9c.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6145f47393fbe70c4d885f9c.md
index 170fcac00e3..351a63f09d3 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6145f47393fbe70c4d885f9c.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6145f47393fbe70c4d885f9c.md
@@ -151,7 +151,7 @@ assert.notEmpty(document.querySelectorAll('div.answer')?.[1]?.querySelector('tex
             </div>
 --fcc-editable-region--
             <div class="answer">
-              
+
             </div>
 --fcc-editable-region--
           </div>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6148da157cc0bd0d06df5c0a.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6148da157cc0bd0d06df5c0a.md
index 323ec1f4514..cf2d4d3259c 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6148da157cc0bd0d06df5c0a.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6148da157cc0bd0d06df5c0a.md
@@ -7,8 +7,7 @@ dashedName: step-57
 
 # --description--
 
-To align the input boxes with each other, create a new ruleset that targets all `input` and `label` elements within an `.info` element and set the `display` property 
-to `inline-block`.
+To align the input boxes with each other, create a new ruleset that targets all `input` and `label` elements within an `.info` element and set the `display` property to `inline-block`.
 
 Also, align the `label` element's text to the right.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6148defa9c01520fb9d178a0.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6148defa9c01520fb9d178a0.md
index fad7d999ee4..839412ae520 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6148defa9c01520fb9d178a0.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6148defa9c01520fb9d178a0.md
@@ -305,7 +305,7 @@ p::before {
 }
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 
 .sr-only {
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6148e5aeb102e3142de026a2.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6148e5aeb102e3142de026a2.md
index f20a7c88035..6882a5b51b0 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6148e5aeb102e3142de026a2.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-accessibility-by-building-a-quiz/6148e5aeb102e3142de026a2.md
@@ -9,7 +9,7 @@ dashedName: step-68
 
 Finally, the navigation accessibility can be improved by providing keyboard shortcuts.
 
-The `accesskey` attribute accepts a space-separated list of access keys. For example:
+The `accesskey` attribute accepts a space-separated list of access keys. 예시:
 
 ```html
 <button type="submit" accesskey="s">Submit</button>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f3477aefa51bfc29327200b.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f3477aefa51bfc29327200b.md
index 7cc171c99e3..890144637bc 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f3477aefa51bfc29327200b.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f3477aefa51bfc29327200b.md
@@ -22,7 +22,7 @@ Your `styles.css` file should have the `h1, h2, p` type selector.
   assert(getUserInput('editableContents').replace(/[\s\n]*/g, "").match(/(h1|h2|p),(h1|h2|p),(h1|h2|p){/));
 }
 ```
- 
+
 Your selector should set the `text-align` property to `center`.
 
 ```js
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f356ed60785e1f3e9850b6e.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f356ed60785e1f3e9850b6e.md
index 0211bc2a565..9e288cdff9f 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f356ed60785e1f3e9850b6e.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f356ed60785e1f3e9850b6e.md
@@ -7,7 +7,7 @@ dashedName: step-24
 
 # --description--
 
-Now it's easy to see that the text is centered inside the `#menu` element. Currently, the width of the `#menu` element is specified in pixels (`px`). 
+Now it's easy to see that the text is centered inside the `#menu` element. Currently, the width of the `#menu` element is specified in pixels (`px`).
 
 Change the `width` property's value to be `80%`, to make it 80% the width of its parent element (`body`).
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f356ed6199b0cdef1d2be8f.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f356ed6199b0cdef1d2be8f.md
index 112a748e061..fc59cd12445 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f356ed6199b0cdef1d2be8f.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f356ed6199b0cdef1d2be8f.md
@@ -7,7 +7,7 @@ dashedName: step-26
 
 # --description--
 
-So far you have been using type and id selectors to style elements. However, it is more common to use a different selector to style your elements. 
+So far you have been using type and id selectors to style elements. However, it is more common to use a different selector to style your elements.
 
 A <dfn>class selector</dfn> is defined by a name with a dot directly in front of it, like this:
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f3ef6e0a81099d9a697b550.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f3ef6e0a81099d9a697b550.md
index 9f72f2380b6..7d83aef878e 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f3ef6e0a81099d9a697b550.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f3ef6e0a81099d9a697b550.md
@@ -97,7 +97,7 @@ assert(document.querySelector("footer > p > a")?.href === "https://www.freecodec
       </main>
 --fcc-editable-region--
       <footer>
-        
+
       </footer>
 --fcc-editable-region--
     </div>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f7b88d37b1f98386f04edc0.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f7b88d37b1f98386f04edc0.md
index 5ac10ddb2d6..e692f3da740 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f7b88d37b1f98386f04edc0.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-basic-css-by-building-a-cafe-menu/5f7b88d37b1f98386f04edc0.md
@@ -13,7 +13,7 @@ The CSS rule for the `flavor` class already sets the properties you want. Add th
 
 # --hints--
 
-You should add the `.dessert` selector to your `.flavor` selector. 
+You should add the `.dessert` selector to your `.flavor` selector.
 
 ```js
 const selector = new __helpers.CSSHelp(document).getStyle('.flavor, .dessert') || new __helpers.CSSHelp(document).getStyle('.dessert, .flavor');
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-animation-by-building-a-ferris-wheel/6169ab1aaeb4cd1174def700.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-animation-by-building-a-ferris-wheel/6169ab1aaeb4cd1174def700.md
index 976bf2acd56..4b73f714fae 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-animation-by-building-a-ferris-wheel/6169ab1aaeb4cd1174def700.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-animation-by-building-a-ferris-wheel/6169ab1aaeb4cd1174def700.md
@@ -7,7 +7,7 @@ dashedName: step-27
 
 # --description--
 
-Because the animation is on an infinite loop and the start and end colors are not the same, the transition appears jerky when it switches back to yellow from red. 
+Because the animation is on an infinite loop and the start and end colors are not the same, the transition appears jerky when it switches back to yellow from red.
 
 To start fixing this, remove the `background-color` from your `0%` selector.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-colors-by-building-a-set-of-colored-markers/61695c4aad56f95497c19583.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-colors-by-building-a-set-of-colored-markers/61695c4aad56f95497c19583.md
index 3bc7d060598..038b19950be 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-colors-by-building-a-set-of-colored-markers/61695c4aad56f95497c19583.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-colors-by-building-a-set-of-colored-markers/61695c4aad56f95497c19583.md
@@ -9,7 +9,7 @@ dashedName: step-3
 
 Remember that the `title` element gives search engines extra information about the page. It also displays the content of that `title` element in two more ways:
 
-* in the title bar when the page is open  
+* in the title bar when the page is open
 * in the browser tab for the page when you hover on it. Even if that tab is not active, once you hover on the tab, the `title` text is displayed.
 
 Within the `head` element, nest a `title` element with the text `Colored Markers`.
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-colors-by-building-a-set-of-colored-markers/616d4a84b756d9c4b8255093.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-colors-by-building-a-set-of-colored-markers/616d4a84b756d9c4b8255093.md
index 5f276e75887..1fa98d5c871 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-colors-by-building-a-set-of-colored-markers/616d4a84b756d9c4b8255093.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-colors-by-building-a-set-of-colored-markers/616d4a84b756d9c4b8255093.md
@@ -13,7 +13,7 @@ As a reminder, here's how to target the class `freecodecamp`:
 
 ```css
 .freecodecamp {
-  
+
 }
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-colors-by-building-a-set-of-colored-markers/6176519636a76b810ab1219a.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-colors-by-building-a-set-of-colored-markers/6176519636a76b810ab1219a.md
index c12996ca382..e982ec568a1 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-colors-by-building-a-set-of-colored-markers/6176519636a76b810ab1219a.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-colors-by-building-a-set-of-colored-markers/6176519636a76b810ab1219a.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-Create a CSS rule that targets the class `two` and set its `background-color` property to `green`. 
+Create a CSS rule that targets the class `two` and set its `background-color` property to `green`.
 
 Also, create a separate CSS rule that targets the class `three` and set its `background-color` to `blue`.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-flexbox-by-building-a-photo-gallery/61537bb9b1a29430ac15ad38.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-flexbox-by-building-a-photo-gallery/61537bb9b1a29430ac15ad38.md
index 60b0ca3f063..01e464db441 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-flexbox-by-building-a-photo-gallery/61537bb9b1a29430ac15ad38.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-flexbox-by-building-a-photo-gallery/61537bb9b1a29430ac15ad38.md
@@ -49,7 +49,7 @@ assert.equal(title?.text?.trim(), 'Photo Gallery');
   <head>
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
-    
+
   </head>
   <body>
   </body>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-flexbox-by-building-a-photo-gallery/6153a3952facd25a83fe8083.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-flexbox-by-building-a-photo-gallery/6153a3952facd25a83fe8083.md
index 95a478ec337..c12e870bfee 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-flexbox-by-building-a-photo-gallery/6153a3952facd25a83fe8083.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-flexbox-by-building-a-photo-gallery/6153a3952facd25a83fe8083.md
@@ -9,7 +9,7 @@ dashedName: step-23
 
 The `::after` pseudo-element creates an element that is the last child of the selected element. You can use it to add an empty element after the last image. If you give it the same `width` as the images it will push the last image to the left when the gallery is in a two-column layout. Right now, it is in the center because you set `justify-content: center` on the flex container.
 
-Example:
+예:
 
 ```CSS
 .container::after {
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/61439dfc811e12666b04be6f.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/61439dfc811e12666b04be6f.md
index f4ee0bb5ab3..4b256470d44 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/61439dfc811e12666b04be6f.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/61439dfc811e12666b04be6f.md
@@ -100,7 +100,7 @@ assert(document.querySelectorAll('.text p')?.[2]?.innerText === "It wasn't as dr
           After years - years - of pondering these two problems and how to solve them, I slipped, hit my head on the sink, and when I came to I had a revelation! A vision! A picture in my head! A picture of this! This is what makes time travel possible: the flux capacitor!
         </p>
 --fcc-editable-region--
-        
+
 --fcc-editable-region--
       </section>
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6143a1a228f7d068ab16a130.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6143a1a228f7d068ab16a130.md
index db32dfa57dc..999ac413488 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6143a1a228f7d068ab16a130.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6143a1a228f7d068ab16a130.md
@@ -117,7 +117,7 @@ assert(document.querySelectorAll('.text p')?.[4]?.innerText === 'No more walls o
           <hr />
         </blockquote>
 --fcc-editable-region--
-        
+
 --fcc-editable-region--
       </section>
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6143b9e1f5035c6e5f2a8231.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6143b9e1f5035c6e5f2a8231.md
index b6b2d1bd906..2d7aa249984 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6143b9e1f5035c6e5f2a8231.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6143b9e1f5035c6e5f2a8231.md
@@ -212,7 +212,7 @@ assert(h4s?.every(h4 => h4?.classList?.contains('list-subtitle')));
           <h3 class="list-title">A Brief History</h3>
           <p>Of the Curriculum</p>
           <ul class="lists">
-          
+
           </ul>
         </article>
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6144f1410990ea17187a722b.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6144f1410990ea17187a722b.md
index 03e2b2add94..0ffb777c0ec 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6144f1410990ea17187a722b.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6144f1410990ea17187a722b.md
@@ -7,7 +7,7 @@ dashedName: step-33
 
 # --description--
 
-Now you can style the layout of your grid. CSS Grid is similar to Flexbox in that it has a special property for both the parent and child elements. 
+Now you can style the layout of your grid. CSS Grid is similar to Flexbox in that it has a special property for both the parent and child elements.
 
 In this case, your parent element is the `main` element. Set the content to have a three-column layout by adding a `grid-template-columns` property with a value of `1fr 94rem 1fr`. This will create three columns where the middle column is `94rem` wide, and the first and last columns are both 1 fraction of the remaining space in the grid container.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6148f6f7d8914c78e93136ca.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6148f6f7d8914c78e93136ca.md
index 869b75b9f75..6fc013f541d 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6148f6f7d8914c78e93136ca.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-grid-by-building-a-magazine/6148f6f7d8914c78e93136ca.md
@@ -383,14 +383,14 @@ hr {
   .hero-title {
     font-size: 6rem;
   }
-  
+
   .hero-subtitle,
   .author,
   .quote,
   .list-title {
     font-size: 1.8rem;
   }
-  
+
   .social-icons {
     font-size: 2rem;
   }
@@ -755,14 +755,14 @@ hr {
   .hero-title {
     font-size: 6rem;
   }
-  
+
   .hero-subtitle,
   .author,
   .quote,
   .list-title {
     font-size: 1.8rem;
   }
-  
+
   .social-icons {
     font-size: 2rem;
   }
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61967e74a8e3690ab6292daa.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61967e74a8e3690ab6292daa.md
index 11e1aa4022c..2572b413a4d 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61967e74a8e3690ab6292daa.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61967e74a8e3690ab6292daa.md
@@ -36,7 +36,7 @@ assert.include(['linear-gradient(45deg,rgb(118,201,255),rgb(247,255,222))', 'rgb
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61968df2acd5550bf1616c34.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61968df2acd5550bf1616c34.md
index e401d42eef2..06e8716e6e4 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61968df2acd5550bf1616c34.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61968df2acd5550bf1616c34.md
@@ -30,7 +30,7 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('body')?.padding, '0px');
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
@@ -47,7 +47,7 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('body')?.padding, '0px');
 --fcc-editable-region--
 body {
   background: linear-gradient(45deg, rgb(118, 201, 255), rgb(247, 255, 222));
-  
+
 }
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61968e9243a4090cc805531c.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61968e9243a4090cc805531c.md
index 69b77818e03..ec42f168032 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61968e9243a4090cc805531c.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61968e9243a4090cc805531c.md
@@ -24,7 +24,7 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('body')?.overflow, 'hidden
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61968f8877c6720d6d61aaf5.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61968f8877c6720d6d61aaf5.md
index 5a62adc6dc4..75b3097c34f 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61968f8877c6720d6d61aaf5.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61968f8877c6720d6d61aaf5.md
@@ -36,7 +36,7 @@ assert.exists(document.querySelector('body > div.ground'));
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619691693bc14b0e528f5a20.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619691693bc14b0e528f5a20.md
index a7d08754c7f..2e20bd3589a 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619691693bc14b0e528f5a20.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619691693bc14b0e528f5a20.md
@@ -36,7 +36,7 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('.ground')?.height, '400px
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619692ff79f5770fc6d8c0b4.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619692ff79f5770fc6d8c0b4.md
index 453a865ebdd..606e749c437 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619692ff79f5770fc6d8c0b4.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619692ff79f5770fc6d8c0b4.md
@@ -36,7 +36,7 @@ assert.strictEqual(document.querySelector('.ground')?.previousElementSibling, do
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196990f966e8f10a40094f6.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196990f966e8f10a40094f6.md
index 694c4ab9a4f..46ebd08c100 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196990f966e8f10a40094f6.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196990f966e8f10a40094f6.md
@@ -36,7 +36,7 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('.penguin')?.height, '300p
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619699c10a0f6e11591d73c4.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619699c10a0f6e11591d73c4.md
index f60b61666e3..860cde33238 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619699c10a0f6e11591d73c4.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619699c10a0f6e11591d73c4.md
@@ -31,7 +31,7 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('.penguin')?.marginTop, '7
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61969aa6acef5b12200f672e.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61969aa6acef5b12200f672e.md
index 22cb89b8a09..3fa5992f538 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61969aa6acef5b12200f672e.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61969aa6acef5b12200f672e.md
@@ -38,7 +38,7 @@ assert.strictEqual(document.querySelector('.penguin')?.previousElementSibling, d
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61969d66cfcdba137d021558.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61969d66cfcdba137d021558.md
index af9425894d4..e8eba6e4ec4 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61969d66cfcdba137d021558.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61969d66cfcdba137d021558.md
@@ -24,7 +24,7 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('.left-mountain')?.positio
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61969e7451455614217e901b.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61969e7451455614217e901b.md
index f42588bfa22..a182060c6cc 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61969e7451455614217e901b.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61969e7451455614217e901b.md
@@ -38,7 +38,7 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('.left-mountain')?.getProp
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196adc17f77a714d51485f2.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196adc17f77a714d51485f2.md
index 10f740f4b95..dc15f9983e2 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196adc17f77a714d51485f2.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196adc17f77a714d51485f2.md
@@ -36,7 +36,7 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('.ground')?.zIndex, '3');
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196aead7ac7bf1584b17a7f.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196aead7ac7bf1584b17a7f.md
index 39140afc8a7..870ce25dc10 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196aead7ac7bf1584b17a7f.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196aead7ac7bf1584b17a7f.md
@@ -30,7 +30,7 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('.ground')?.marginTop, '-5
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
@@ -80,7 +80,7 @@ body {
   background: linear-gradient(90deg, rgb(88, 175, 236), rgb(182, 255, 255));
   z-index: 3;
   position: absolute;
-  
+
 }
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196d2c0f22ca0293107c048.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196d2c0f22ca0293107c048.md
index 1ea98d88787..61cf99cfee2 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196d2c0f22ca0293107c048.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6196d2c0f22ca0293107c048.md
@@ -91,7 +91,7 @@ body {
 }
 
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
 
 .penguin {
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6197f667297bb30a552ce017.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6197f667297bb30a552ce017.md
index 7bde415f0d5..c34e5dc0b50 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6197f667297bb30a552ce017.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/6197f667297bb30a552ce017.md
@@ -30,7 +30,7 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('.ground')?.position, 'abs
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61993cf26a8e0f0a553db223.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61993cf26a8e0f0a553db223.md
index 79822ed8830..837b66e7b8c 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61993cf26a8e0f0a553db223.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61993cf26a8e0f0a553db223.md
@@ -107,7 +107,7 @@ body {
     gray,
     rgb(239, 240, 228)
   );
-  
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619943285a41720e6370d985.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619943285a41720e6370d985.md
index 19e79ad76bc..06adbcbaeda 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619943285a41720e6370d985.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619943285a41720e6370d985.md
@@ -141,7 +141,7 @@ body {
     white 67%
   );
   border-radius: 80% 80% 100% 100%;
-  
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d0d18ca99870f884a7bff.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d0d18ca99870f884a7bff.md
index 14f31e0c18f..2d324e72516 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d0d18ca99870f884a7bff.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d0d18ca99870f884a7bff.md
@@ -63,7 +63,7 @@ assert.exists(document.querySelector('.eye.right > div.eye-lid'));
 
         </div>
         <div class="eye right">
-          
+
         </div>
       </div>
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d204bd73ae51e743b8e94.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d204bd73ae51e743b8e94.md
index 2d03eea5401..e26cf4e13ac 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d204bd73ae51e743b8e94.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d204bd73ae51e743b8e94.md
@@ -273,7 +273,7 @@ body {
   width:  15%;
   height: 30%;
   background-color: orange;
-  
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d20b12996101f430920fb.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d20b12996101f430920fb.md
index 702fecbe8ba..b4d5cd859d9 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d20b12996101f430920fb.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d20b12996101f430920fb.md
@@ -90,7 +90,7 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('.foot')?.getPropVal('back
 --fcc-editable-region--
 :root {
   --penguin-face: white;
-  
+
 }
 
 body {
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d2bd9c1d43c2526e96f1f.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d2bd9c1d43c2526e96f1f.md
index 64e65c8aa5e..a677c9a443b 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d2bd9c1d43c2526e96f1f.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/619d2bd9c1d43c2526e96f1f.md
@@ -286,7 +286,7 @@ body {
 .arm.left {
   top: 35%;
   left: 5%;
-  
+
 }
 
 .arm.right {
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61a8fe15a6a31306e60d1e89.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61a8fe15a6a31306e60d1e89.md
index 7d4ef4402ba..ba85e31a75e 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61a8fe15a6a31306e60d1e89.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-transforms-by-building-a-penguin/61a8fe15a6a31306e60d1e89.md
@@ -30,7 +30,7 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('body')?.height, '100vh');
 ```html
 <!DOCTYPE html>
 <html lang="en">
-  
+
   <head>
     <meta charset="UTF-8" />
     <link rel="stylesheet" href="./styles.css" />
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98cb.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98cb.md
index 4fe3f645461..1ec0487dd16 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98cb.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98cb.md
@@ -61,7 +61,7 @@ assert([...document.querySelector('html').children].some(x => x.localName === 'b
 <!DOCTYPE html>
 --fcc-editable-region--
 <html lang="en">
-  
+
 </html>
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98cc.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98cc.md
index 68878b23b15..eab541ac3f4 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98cc.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98cc.md
@@ -99,7 +99,7 @@ assert.equal(link.dataset.href, "styles.css");
 <html lang="en">
 --fcc-editable-region--
   <head>
-    
+
   </head>
 --fcc-editable-region--
   <body>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98cf.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98cf.md
index 45b83843303..be4622dc06a 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98cf.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98cf.md
@@ -64,6 +64,6 @@ assert.equal(new __helpers.CSSHelp(document).getStyle('body')?.overflow, 'hidden
 
 
 --fcc-editable-region--
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d1.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d1.md
index 9e589da64da..a0f23766612 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d1.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d1.md
@@ -63,6 +63,6 @@ body {
 
 
 --fcc-editable-region--
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d2.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d2.md
index 39aae73d0cc..a5eb230c7a6 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d2.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d2.md
@@ -78,6 +78,6 @@ body {
   width: 100%;
   height: 100%;
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d3.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d3.md
index bf5c4b30f1f..f75b1b65faf 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d3.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d3.md
@@ -100,6 +100,6 @@ body {
   width: 10%;
   height: 70%;
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d5.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d5.md
index 34e85b19ad3..accc2077f00 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d5.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d5.md
@@ -107,6 +107,6 @@ body {
   width: 100%;
   height: 70%;
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d6.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d6.md
index 666ecaffb1d..f89875caf18 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d6.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d6.md
@@ -99,5 +99,5 @@ body {
   width: 100%;
   height: 70%;
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d7.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d7.md
index b993c80f852..73ab6e248e3 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d7.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98d7.md
@@ -7,7 +7,7 @@ dashedName: step-15
 
 # --description--
 
-To use a variable, put the variable name in parentheses with `var` in front of them like this: `var(--variable-name)`. Whatever value you gave the variable will be applied to whatever property you use it on. 
+To use a variable, put the variable name in parentheses with `var` in front of them like this: `var(--variable-name)`. Whatever value you gave the variable will be applied to whatever property you use it on.
 
 Add the variable `--building-color1` you created in the previous step as the value of the `background-color` property of the `.bb1a` class.
 
@@ -96,5 +96,5 @@ body {
   width: 100%;
   height: 70%;
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98da.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98da.md
index 2bdce33b6e4..bebfc1ba677 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98da.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98da.md
@@ -128,6 +128,6 @@ body {
   height: 70%;
   background-color: var(--building-color1);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98dc.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98dc.md
index 6bd9f53408d..215b48f50b1 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98dc.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98dc.md
@@ -122,6 +122,6 @@ body {
   width: 11%;
   height: 58%;
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98dd.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98dd.md
index ffbc76b0b1c..70947702891 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98dd.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98dd.md
@@ -137,6 +137,6 @@ body {
   width: 11%;
   height: 58%;
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98de.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98de.md
index 99829f8fb83..af393703a46 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98de.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98de.md
@@ -136,5 +136,5 @@ body {
   width: 11%;
   height: 58%;
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98df.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98df.md
index 18991ab296c..a4d3de38613 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98df.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98df.md
@@ -120,5 +120,5 @@ body {
   width: 11%;
   height: 58%;
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e1.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e1.md
index 1ffeb2c17bb..59dfc773ca9 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e1.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e1.md
@@ -150,6 +150,6 @@ body {
   width: 11%;
   height: 58%;
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e2.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e2.md
index f8a42aa5898..5894d0b8fbe 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e2.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e2.md
@@ -131,5 +131,5 @@ body {
   width: 11%;
   height: 58%;
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e7.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e7.md
index d0b1000a10b..f7a6f9a6d14 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e7.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e7.md
@@ -248,6 +248,6 @@ body {
 --fcc-editable-region--
 
 --fcc-editable-region--
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e9.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e9.md
index 19c5650bdf4..f53ca2d0fea 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e9.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98e9.md
@@ -218,6 +218,6 @@ body {
   width: 9%;
   height: 38%;
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ea.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ea.md
index a7ba8c36511..d239fcf498c 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ea.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ea.md
@@ -176,6 +176,6 @@ body {
   width: 9%;
   height: 38%;
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ec.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ec.md
index 8143d18ec3c..d5b43a7b803 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ec.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ec.md
@@ -198,6 +198,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ed.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ed.md
index 68bb2249960..49dbfe11706 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ed.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ed.md
@@ -197,6 +197,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ee.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ee.md
index bd0e16a4841..7ac80de3679 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ee.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ee.md
@@ -191,6 +191,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ef.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ef.md
index 0512796cfb2..07de4b5f0ad 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ef.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ef.md
@@ -192,6 +192,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f0.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f0.md
index bd10be55926..cde269a3ef5 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f0.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f0.md
@@ -213,6 +213,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f1.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f1.md
index e658de33d12..f3ea5bd8e8a 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f1.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f1.md
@@ -218,6 +218,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f2.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f2.md
index 5f21d781a13..c0c21981a71 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f2.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f2.md
@@ -232,6 +232,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f3.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f3.md
index 5b832df0f87..36dac6ed6f3 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f3.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f3.md
@@ -217,6 +217,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f4.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f4.md
index 6059b2d60a3..1d666325de7 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f4.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f4.md
@@ -222,6 +222,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f5.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f5.md
index 6e64130d7cb..668ecb81e26 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f5.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f5.md
@@ -193,6 +193,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f6.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f6.md
index ac074fd614c..4eb4a6918af 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f6.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f6.md
@@ -202,6 +202,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f7.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f7.md
index 9e7d9a17d54..419a0d12260 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f7.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f7.md
@@ -198,6 +198,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f8.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f8.md
index 606401d03e2..41ff1d6b033 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f8.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f8.md
@@ -205,6 +205,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f9.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f9.md
index 82bda67e3e4..0f7bc880642 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f9.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98f9.md
@@ -202,6 +202,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fa.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fa.md
index ab1fca84681..60aa166ebaf 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fa.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fa.md
@@ -206,6 +206,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fb.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fb.md
index 89c7828a13d..b70bae5c655 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fb.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fb.md
@@ -146,11 +146,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -213,7 +213,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -235,6 +235,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fc.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fc.md
index e61306e210a..14e970c5a43 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fc.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fc.md
@@ -111,11 +111,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -184,7 +184,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -206,6 +206,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fe.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fe.md
index 69d6e68abbd..eac8ff649c1 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fe.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98fe.md
@@ -159,11 +159,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -233,7 +233,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -255,6 +255,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ff.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ff.md
index c7755836830..865daed1337 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ff.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e98ff.md
@@ -129,11 +129,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -211,7 +211,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -233,6 +233,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9900.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9900.md
index f110fe4f8be..a9da84c0d98 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9900.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9900.md
@@ -117,11 +117,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -197,7 +197,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -219,6 +219,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9901.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9901.md
index 93559351e86..00ae65c3b20 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9901.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9901.md
@@ -117,11 +117,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -197,7 +197,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -219,6 +219,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9902.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9902.md
index 01485d6fc62..83493b6aa57 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9902.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9902.md
@@ -123,11 +123,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -201,7 +201,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -223,5 +223,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9903.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9903.md
index a84664027d0..02320a6bd39 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9903.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9903.md
@@ -118,11 +118,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -196,7 +196,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -218,6 +218,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9904.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9904.md
index 826e82e8004..ca8edf45e9a 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9904.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9904.md
@@ -140,11 +140,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -218,7 +218,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -240,6 +240,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9905.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9905.md
index be8f279c220..7f9d66c1ec8 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9905.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9905.md
@@ -112,11 +112,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -196,7 +196,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -218,6 +218,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9906.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9906.md
index 28fd7889ce6..aa641dc6f91 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9906.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9906.md
@@ -139,11 +139,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -222,7 +222,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -244,6 +244,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9907.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9907.md
index b97da80b656..48733496286 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9907.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9907.md
@@ -146,11 +146,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -231,7 +231,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -253,6 +253,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9908.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9908.md
index 74f1fa92aaa..a47f2df033a 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9908.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9908.md
@@ -134,11 +134,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -208,7 +208,7 @@ body {
   width: 80%;
   height: 5%;
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -232,7 +232,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -254,5 +254,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9909.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9909.md
index c1f05cb180c..6e4e06f89eb 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9909.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9909.md
@@ -118,11 +118,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -193,7 +193,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -218,7 +218,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -240,6 +240,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990a.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990a.md
index 91c5eaceb1f..4a0b95c948e 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990a.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990a.md
@@ -150,11 +150,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -225,7 +225,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -250,7 +250,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -272,6 +272,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990b.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990b.md
index 6c551ec4605..a0c564519f5 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990b.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990b.md
@@ -127,11 +127,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -202,7 +202,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -227,7 +227,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -249,6 +249,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990c.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990c.md
index 207b0898467..1b8bdafb36d 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990c.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990c.md
@@ -126,11 +126,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -201,7 +201,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -226,7 +226,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -248,6 +248,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990d.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990d.md
index c792b7c315e..6a27d5d0cd6 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990d.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990d.md
@@ -128,11 +128,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -203,7 +203,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -228,7 +228,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -250,6 +250,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990e.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990e.md
index 03e6774811d..6dc46c48fae 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990e.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990e.md
@@ -137,11 +137,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -212,7 +212,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -239,7 +239,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -261,5 +261,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990f.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990f.md
index 9c546746e5f..212b56d7b44 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990f.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e990f.md
@@ -146,11 +146,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -221,7 +221,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -252,7 +252,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -274,6 +274,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9910.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9910.md
index 5e0b774f8ab..fa28102c9cc 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9910.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9910.md
@@ -133,11 +133,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -208,7 +208,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -239,7 +239,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -261,6 +261,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9911.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9911.md
index 2331da101b7..0ee64dc1abf 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9911.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9911.md
@@ -158,11 +158,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -233,7 +233,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -264,7 +264,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -286,6 +286,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9912.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9912.md
index 05d085a1be7..53d7e704de6 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9912.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9912.md
@@ -153,11 +153,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -228,7 +228,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -261,7 +261,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -283,5 +283,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9913.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9913.md
index d451d028ebe..467fa4bb2e6 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9913.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9913.md
@@ -137,11 +137,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -212,7 +212,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -236,7 +236,7 @@ body {
   width: 60%;
   height: 10%;
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -253,7 +253,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -275,6 +275,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9914.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9914.md
index 5cb763bcec7..284b23fe6cb 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9914.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9914.md
@@ -141,11 +141,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -216,7 +216,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -258,7 +258,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -280,5 +280,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9915.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9915.md
index e476f5d90bc..3f416454efe 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9915.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9915.md
@@ -161,11 +161,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -236,7 +236,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -266,7 +266,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -313,13 +313,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -386,6 +386,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9916.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9916.md
index 8685190853e..3ca080d7d4a 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9916.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9916.md
@@ -155,11 +155,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -230,7 +230,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -271,7 +271,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -293,5 +293,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9917.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9917.md
index 226aa2791df..6b10dba2cde 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9917.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9917.md
@@ -158,11 +158,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -233,7 +233,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -281,7 +281,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -303,5 +303,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9918.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9918.md
index 891c49a2e13..7425a7453c5 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9918.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9918.md
@@ -141,11 +141,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -216,7 +216,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -242,7 +242,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -272,7 +272,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -294,5 +294,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9919.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9919.md
index 70f365e2891..2c645796720 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9919.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9919.md
@@ -141,11 +141,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -216,7 +216,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -244,7 +244,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -274,7 +274,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -296,6 +296,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991a.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991a.md
index 99f5abea099..38a750c2e10 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991a.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991a.md
@@ -150,11 +150,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -225,7 +225,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -255,7 +255,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -285,7 +285,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -307,6 +307,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991b.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991b.md
index f1cc76cabd4..77b222c82d0 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991b.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991b.md
@@ -150,11 +150,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -225,7 +225,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -255,7 +255,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -287,7 +287,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -309,6 +309,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991c.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991c.md
index e047f9f3021..1d752c37238 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991c.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991c.md
@@ -146,11 +146,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -221,7 +221,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -251,7 +251,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -290,7 +290,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -312,6 +312,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991d.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991d.md
index 75eac697004..1c00fbd3581 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991d.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991d.md
@@ -144,11 +144,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -219,7 +219,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -249,7 +249,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -288,7 +288,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -310,6 +310,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991e.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991e.md
index 68bea5beb87..514895c56e9 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991e.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991e.md
@@ -154,11 +154,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -229,7 +229,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -259,7 +259,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -300,7 +300,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -322,5 +322,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991f.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991f.md
index e4198afe229..1f6852e16ec 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991f.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e991f.md
@@ -148,11 +148,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -223,7 +223,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -253,7 +253,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -298,7 +298,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -320,5 +320,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9920.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9920.md
index 3ccdb0dbcc5..64c90010bfa 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9920.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9920.md
@@ -154,11 +154,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -229,7 +229,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -259,7 +259,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -304,7 +304,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -326,5 +326,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9921.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9921.md
index 3cff4a2acda..858753af01f 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9921.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9921.md
@@ -168,11 +168,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -243,7 +243,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -273,7 +273,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -321,7 +321,7 @@ body {
   height: 35%;
   background-color: var(--building-color1);
 }
-  
+
 .fb4 {
   width: 8%;
   height: 45%;
@@ -343,6 +343,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9922.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9922.md
index 0fa90cef88b..62a5b488609 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9922.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9922.md
@@ -165,11 +165,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -240,7 +240,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -270,7 +270,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -342,6 +342,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9923.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9923.md
index c6942ea1b38..5d5ebf8d59d 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9923.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9923.md
@@ -159,11 +159,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -234,7 +234,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -264,7 +264,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -317,7 +317,7 @@ body {
   width: 80%;
   height: 15%;
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -344,5 +344,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9924.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9924.md
index a7f0e2cb952..9604d11d8b4 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9924.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9924.md
@@ -149,11 +149,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -224,7 +224,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -254,7 +254,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -301,13 +301,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -335,6 +335,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9925.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9925.md
index 19ff10935fc..c8f210afecd 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9925.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9925.md
@@ -155,11 +155,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -230,7 +230,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -260,7 +260,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -307,13 +307,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -341,6 +341,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9926.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9926.md
index 7c0132cbbd5..55926ec1f04 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9926.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9926.md
@@ -163,11 +163,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -238,7 +238,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -268,7 +268,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -315,13 +315,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -351,5 +351,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9927.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9927.md
index ed213fde285..98a329d9a5a 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9927.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9927.md
@@ -153,11 +153,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -228,7 +228,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -258,7 +258,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -305,13 +305,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -345,6 +345,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9928.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9928.md
index 456c70cfb9f..c5a9602f7d0 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9928.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9928.md
@@ -152,11 +152,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -227,7 +227,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -257,7 +257,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -304,13 +304,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -344,6 +344,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9929.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9929.md
index ad6a18db3d8..3214ddbf3c4 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9929.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9929.md
@@ -165,11 +165,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -240,7 +240,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -270,7 +270,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -317,13 +317,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -357,6 +357,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992a.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992a.md
index 7c1fd3dfc0a..dfebdeaabc0 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992a.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992a.md
@@ -160,11 +160,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -235,7 +235,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -265,7 +265,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -312,13 +312,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -354,6 +354,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992b.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992b.md
index 6ec1e954b18..5d7ebb531e1 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992b.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992b.md
@@ -160,11 +160,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -235,7 +235,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -265,7 +265,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -312,13 +312,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -357,5 +357,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992c.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992c.md
index 1548769e3c8..47bd92f34d7 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992c.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992c.md
@@ -162,11 +162,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -237,7 +237,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -267,7 +267,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -314,13 +314,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -359,6 +359,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992d.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992d.md
index 6ddb73f13b4..92949a72523 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992d.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992d.md
@@ -173,11 +173,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -248,7 +248,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -278,7 +278,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -325,13 +325,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -372,6 +372,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992e.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992e.md
index 3fd53b9a1ec..ab57df7fc09 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992e.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992e.md
@@ -167,11 +167,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -242,7 +242,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -272,7 +272,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -319,13 +319,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -370,5 +370,5 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992f.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992f.md
index c246e9f3191..b696b38bef5 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992f.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e992f.md
@@ -167,11 +167,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -242,7 +242,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -272,7 +272,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -319,13 +319,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -372,6 +372,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9930.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9930.md
index 997ee5ecec0..9460ef08809 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9930.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9930.md
@@ -167,11 +167,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -242,7 +242,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -272,7 +272,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -319,13 +319,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -376,6 +376,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9931.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9931.md
index 742b4250c6c..7a675368a34 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9931.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9931.md
@@ -161,11 +161,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9932.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9932.md
index 80bdfe3d777..a3b73646bfd 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9932.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9932.md
@@ -179,11 +179,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -254,7 +254,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -284,7 +284,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -331,13 +331,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -391,6 +391,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9933.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9933.md
index f3731819799..60f7fe5ad21 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9933.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9933.md
@@ -179,11 +179,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -254,7 +254,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -284,7 +284,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -331,13 +331,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -397,6 +397,6 @@ body {
   height: 38%;
   background-color: var(--building-color3);
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9934.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9934.md
index 3f172a0388a..648a4117a8b 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9934.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9934.md
@@ -179,11 +179,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -254,7 +254,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -284,7 +284,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -331,13 +331,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9935.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9935.md
index ef5b15a88a7..fbaa78bc615 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9935.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9935.md
@@ -173,11 +173,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -248,7 +248,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -278,7 +278,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -325,13 +325,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9936.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9936.md
index 9d8a3c2d880..cdd75a3c6fd 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9936.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9936.md
@@ -161,11 +161,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -236,7 +236,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -266,7 +266,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -313,13 +313,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -397,6 +397,6 @@ body {
       var(--window-color3) 30%
     );
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9937.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9937.md
index 0c9bd249eb4..528b3b272c5 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9937.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9937.md
@@ -162,11 +162,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -237,7 +237,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -267,7 +267,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -314,13 +314,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -398,6 +398,6 @@ body {
       var(--window-color3) 30%
     );
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9938.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9938.md
index 0c60ad6415d..75b0a075d9e 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9938.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9938.md
@@ -180,11 +180,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -255,7 +255,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -285,7 +285,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -332,13 +332,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -416,6 +416,6 @@ body {
       var(--window-color3) 30%
     );
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9939.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9939.md
index cb07a8fde0b..82ecd30f91a 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9939.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e9939.md
@@ -169,11 +169,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -244,7 +244,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -274,7 +274,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -321,13 +321,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -405,6 +405,6 @@ body {
       var(--window-color3) 30%
     );
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993a.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993a.md
index 12d39cb4c09..fa492b653cb 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993a.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993a.md
@@ -178,11 +178,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -253,7 +253,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -283,7 +283,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -330,13 +330,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993b.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993b.md
index f43412ed800..90fab1c4de2 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993b.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993b.md
@@ -178,11 +178,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -253,7 +253,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -283,7 +283,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -330,13 +330,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -416,7 +416,7 @@ body {
 }
 --fcc-editable-region--
 @media (max-width: 1000px) {
-  
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993c.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993c.md
index 6d77b62b471..def68297f29 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993c.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993c.md
@@ -432,6 +432,6 @@ var(--window-color3) 30%
   }
 --fcc-editable-region--
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993d.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993d.md
index 1a90ae8e5b9..94262225639 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993d.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993d.md
@@ -194,11 +194,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -269,7 +269,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -299,7 +299,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -346,13 +346,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -445,6 +445,6 @@ body {
       );
   }
 }
-    
+
 ```
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993e.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993e.md
index 592c85e070d..e1130fb6983 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993e.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-css-variables-by-building-a-city-skyline/5d822fd413a79914d39e993e.md
@@ -190,11 +190,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -265,7 +265,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -295,7 +295,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -342,13 +342,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
@@ -446,7 +446,7 @@ body {
       );
   }
 }
-    
+
 ```
 
 # --solutions--
@@ -600,11 +600,11 @@ body {
 .bb1a {
   width: 70%;
 }
-  
+
 .bb1b {
   width: 80%;
 }
-  
+
 .bb1c {
   width: 90%;
 }
@@ -675,7 +675,7 @@ body {
   height: 5%;
   background-color: var(--building-color4);
 }
-  
+
 .bb4c {
   width: 100%;
   height: 85%;
@@ -705,7 +705,7 @@ body {
   height: 10%;
   background-color: var(--building-color4);
 }
-  
+
 .fb1c {
   width: 100%;
   height: 80%;
@@ -752,13 +752,13 @@ body {
   width: 10%;
   height: 35%;
 }
-  
+
 .fb3a {
   width: 80%;
   height: 15%;
   background-color: var(--building-color1);
 }
-  
+
 .fb3b {
   width: 100%;
   height: 35%;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc1798ff86c76b9248c6eb3.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc1798ff86c76b9248c6eb3.md
index b121a5feca6..32423df3ed1 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc1798ff86c76b9248c6eb3.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc1798ff86c76b9248c6eb3.md
@@ -77,7 +77,7 @@ assert(collection.indexOf('H1') < collection.indexOf('H2'));
   <body>
 --fcc-editable-region--
     <h1>CatPhotoApp</h1>
-    
+
 --fcc-editable-region--
   </body>
 </html>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc17d3bf86c76b9248c6eb4.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc17d3bf86c76b9248c6eb4.md
index b6d246dbd52..f3f06e33df0 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc17d3bf86c76b9248c6eb4.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc17d3bf86c76b9248c6eb4.md
@@ -53,7 +53,7 @@ assert(collection.indexOf('H2') < collection.indexOf('P'));
     <h1>CatPhotoApp</h1>
 --fcc-editable-region--
     <h2>Cat Photos</h2>
-    
+
 --fcc-editable-region--
   </body>
 </html>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc17dc8f86c76b9248c6eb5.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc17dc8f86c76b9248c6eb5.md
index 303e1ec4147..3f44b228de2 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc17dc8f86c76b9248c6eb5.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc17dc8f86c76b9248c6eb5.md
@@ -62,9 +62,9 @@ assert(
     <h1>CatPhotoApp</h1>
     <h2>Cat Photos</h2>
 --fcc-editable-region--
-    
+
     <p>See more cat photos in our gallery.</p>
-    
+
 --fcc-editable-region--
   </body>
 </html>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc2385ff86c76b9248c6eb7.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc2385ff86c76b9248c6eb7.md
index 3904cebdf21..c27f707d9e2 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc2385ff86c76b9248c6eb7.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc2385ff86c76b9248c6eb7.md
@@ -60,12 +60,12 @@ assert(
 <html>
   <body>
 --fcc-editable-region--
-  
+
     <h1>CatPhotoApp</h1>
     <h2>Cat Photos</h2>
     <!-- TODO: Add link to cat photos -->
     <p>See more cat photos in our gallery.</p>
-    
+
 --fcc-editable-region--
   </body>
 </html>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc23f9bf86c76b9248c6eba.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc23f9bf86c76b9248c6eba.md
index 4d8d88199f6..0271d839b31 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc23f9bf86c76b9248c6eba.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc23f9bf86c76b9248c6eba.md
@@ -53,7 +53,7 @@ assert(collection.indexOf('P') < collection.indexOf('IMG'));
       <!-- TODO: Add link to cat photos -->
 --fcc-editable-region--
       <p>See more cat photos in our gallery.</p>
-      
+
 --fcc-editable-region--
     </main>
   </body>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc24614f86c76b9248c6ebd.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc24614f86c76b9248c6ebd.md
index fb3a5f107ff..5048a624251 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc24614f86c76b9248c6ebd.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dc24614f86c76b9248c6ebd.md
@@ -70,7 +70,7 @@ assert(
       <!-- TODO: Add link to cat photos -->
 --fcc-editable-region--
       <p>See more cat photos in our gallery.</p>
-      
+
 --fcc-editable-region--
       <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back.">
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa30b9eacea3f48c6300ad.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa30b9eacea3f48c6300ad.md
index 0994125b0d9..1ac544140f7 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa30b9eacea3f48c6300ad.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa30b9eacea3f48c6300ad.md
@@ -7,7 +7,7 @@ dashedName: step-15
 
 # --description--
 
-In previous steps you used an anchor element to turn text into a link. Other types of content can also be turned into a link by wrapping it in anchor tags. 
+In previous steps you used an anchor element to turn text into a link. Other types of content can also be turned into a link by wrapping it in anchor tags.
 
 Turn the image into a link by surrounding it with necessary element tags. Use `https://freecatphotoapp.com` as the anchor's `href` attribute value.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa3589eacea3f48c6300ae.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa3589eacea3f48c6300ae.md
index e0520466f41..303300a19dc 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa3589eacea3f48c6300ae.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa3589eacea3f48c6300ae.md
@@ -66,7 +66,7 @@ assert(
       </section>
 --fcc-editable-region--
       <section>
-        
+
       </section>
 --fcc-editable-region--
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa371beacea3f48c6300af.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa371beacea3f48c6300af.md
index 727727f45a9..22e7fd5be62 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa371beacea3f48c6300af.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa371beacea3f48c6300af.md
@@ -75,7 +75,7 @@ assert(
 --fcc-editable-region--
       <section>
         <h2>Cat Lists</h2>
-        
+
       </section>
 --fcc-editable-region--
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa37b9eacea3f48c6300b0.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa37b9eacea3f48c6300b0.md
index a3cd59fe5df..42ae2e7f9de 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa37b9eacea3f48c6300b0.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfa37b9eacea3f48c6300b0.md
@@ -49,7 +49,7 @@ assert(secondSectionLastElemNode.nodeName === 'UL');
 --fcc-editable-region--
         <h2>Cat Lists</h2>
         <h3>Things cats love:</h3>
-        
+
 --fcc-editable-region--
       </section>
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb5ecbeacea3f48c6300b1.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb5ecbeacea3f48c6300b1.md
index 1efd3dbed3c..956fefe13e8 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb5ecbeacea3f48c6300b1.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb5ecbeacea3f48c6300b1.md
@@ -18,9 +18,7 @@ Use list item (`li`) elements to create items in a list. Here is an example of l
 
 Within the `ul` element nest three list items to display three things cats love:
 
-`cat nip`
-`laser pointers`
-`lasagna` 
+`cat nip` `laser pointers` `lasagna`
 
 # --hints--
 
@@ -71,7 +69,7 @@ assert(
         <h3>Things cats love:</h3>
 --fcc-editable-region--
         <ul>
-          
+
         </ul>
 --fcc-editable-region--
       </section>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb6250eacea3f48c6300b2.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb6250eacea3f48c6300b2.md
index 90e1b04941c..598d347b67e 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb6250eacea3f48c6300b2.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb6250eacea3f48c6300b2.md
@@ -85,7 +85,7 @@ assert(!/\<img\s+.+\s+src\s*=\s*https:\/\/cdn\.freecodecamp\.org\/curriculum\/ca
           <li>laser pointers</li>
           <li>lasagna</li>
         </ul>
-        
+
 --fcc-editable-region--
       </section>
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb655eeacea3f48c6300b3.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb655eeacea3f48c6300b3.md
index 269e61f1aae..d0d4285efdd 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb655eeacea3f48c6300b3.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb655eeacea3f48c6300b3.md
@@ -65,9 +65,9 @@ assert(
           <li>lasagna</li>
         </ul>
 --fcc-editable-region--
-      
+
         <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/lasagna.jpg" alt="A slice of lasagna on a plate.">
-      
+
 --fcc-editable-region--
       </section>
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb6a35eacea3f48c6300b4.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb6a35eacea3f48c6300b4.md
index 9abc1c6c80d..e8beae4cd32 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb6a35eacea3f48c6300b4.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5dfb6a35eacea3f48c6300b4.md
@@ -88,7 +88,7 @@ assert(
 --fcc-editable-region--
         <figure>
           <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/lasagna.jpg" alt="A slice of lasagna on a plate.">
-          
+
         </figure>
 --fcc-editable-region--
       </section>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d1.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d1.md
index 28ad6702c18..972db05455c 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d1.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d1.md
@@ -72,7 +72,7 @@ assert(
           <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/lasagna.jpg" alt="A slice of lasagna on a plate.">
           <figcaption>Cats <em>love</em> lasagna.</figcaption>  
         </figure>
-        
+
 --fcc-editable-region--
       </section>
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d2.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d2.md
index aa71bdda6ac..51be71387ac 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d2.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d2.md
@@ -11,9 +11,7 @@ The code for an ordered list (`ol`) is similar to an unordered list, but list it
 
 After the second `section` element's last `h3` element, add an ordered list with these three list items:
 
-`flea treatment`
-`thunder`
-`other cats`
+`flea treatment` `thunder` `other cats`
 
 # --hints--
 
@@ -92,7 +90,7 @@ assert([...document.querySelectorAll('ol')].length == 1);
         </figure>
 --fcc-editable-region--
         <h3>Top 3 things cats hate:</h3>
-        
+
 --fcc-editable-region--
       </section>
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d3.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d3.md
index ff8381e4854..832615a6c5a 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d3.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d3.md
@@ -63,7 +63,7 @@ assert($('main > section')[1].lastElementChild.nodeName === 'FIGURE');
           <li>thunder</li>
           <li>other cats</li>
         </ol>
-        
+
 --fcc-editable-region--
       </section>
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d4.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d4.md
index 44020dfc230..b075240b396 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d4.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d4.md
@@ -85,9 +85,9 @@ assert(
         <figure>
           <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/cats.jpg" alt="Five cats looking around a field.">
 --fcc-editable-region--
-        
+
           <figcaption>Cats hate other cats.</figcaption>  
-        
+
 --fcc-editable-region--
         </figure>
       </section>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d5.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d5.md
index 2088328d0c0..8deaf57d655 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d5.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d5.md
@@ -7,7 +7,7 @@ dashedName: step-34
 
 # --description--
 
-Inside the third `section` element, add an `h2` element with the text: 
+Inside the third `section` element, add an `h2` element with the text:
 
 `Cat Form`
 
@@ -96,7 +96,7 @@ assert(
       </section>
 --fcc-editable-region--
       <section>
-        
+
       </section>
 --fcc-editable-region--
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d6.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d6.md
index 0c3c70cec18..561b47e1080 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d6.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d6.md
@@ -79,7 +79,7 @@ assert($('form')[0].innerHTML.trim().length === 0);
       <section>
 --fcc-editable-region--
         <h2>Cat Form</h2>
-        
+
 --fcc-editable-region--
       </section>
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d8.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d8.md
index da46c2b05be..8a76f2f3fd4 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d8.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804d8.md
@@ -99,7 +99,7 @@ assert(
         <h2>Cat Form</h2>
 --fcc-editable-region--
         <form action="https://freecatphotoapp.com/submit-cat-photo">
-          
+
         </form>
 --fcc-editable-region--
       </section>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804da.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804da.md
index 4ed21e7144a..64c3dce0f31 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804da.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804da.md
@@ -83,7 +83,7 @@ assert(collection.indexOf('INPUT') < collection.indexOf('BUTTON'));
         <form action="https://freecatphotoapp.com/submit-cat-photo">
 --fcc-editable-region--
           <input type="text" name="catphotourl" placeholder="cat photo URL" required>
-          
+
 --fcc-editable-region--
         </form>
       </section>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804dc.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804dc.md
index c8889ee04d4..c54dafef93c 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804dc.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804dc.md
@@ -77,14 +77,14 @@ Although you have set the new `input` element's `type` attribute to `radio`, it
 assert(!/\<\s*input\s+type\s*=\s*radio/i.test(code));
 ```
 
-The `radio` button's ` Indoor` text should be located after it instead of before it.
+The `radio` button's `Indoor` text should be located after it instead of before it.
 
 ```js
 const radioInputElem = $('input')[0];
 assert(!radioInputElem.previousSibling.nodeValue.match(/Indoor/i));
 ```
 
-The text ` Indoor` should be located directly to the right of your `radio` button. You have either omitted the text or have a typo.
+The text `Indoor` should be located directly to the right of your `radio` button. You have either omitted the text or have a typo.
 
 ```js
 const radioInputElem = $('input')[0];
@@ -135,7 +135,7 @@ assert(
         <h2>Cat Form</h2>
         <form action="https://freecatphotoapp.com/submit-cat-photo">
 --fcc-editable-region--
- 
+
           <input type="text" name="catphotourl" placeholder="cat photo URL" required>
 --fcc-editable-region--
           <button type="submit">Submit</button>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804dd.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804dd.md
index e4bd4b99e61..b345b4ebeee 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804dd.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804dd.md
@@ -19,7 +19,7 @@ You should make sure the radio button is still present.
 assert($('input[type="radio"]')[0]);
 ```
 
-The text ` Indoor` should be located directly to the right of your `radio` button. Make sure there is a space between the element and the text. You have either omitted the text or have a typo.
+The text `Indoor` should be located directly to the right of your `radio` button. Make sure there is a space between the element and the text. You have either omitted the text or have a typo.
 
 ```js
 const radioInputElem = $('input')[0];
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804e1.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804e1.md
index 4727bf7a55b..3bc26368d2e 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804e1.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804e1.md
@@ -88,10 +88,10 @@ assert(
         <h2>Cat Form</h2>
         <form action="https://freecatphotoapp.com/submit-cat-photo">
 --fcc-editable-region--
-        
+
           <label><input id="indoor" type="radio" name="indoor-outdoor" value="indoor"> Indoor</label>
           <label><input id="outdoor" type="radio" name="indoor-outdoor" value="outdoor"> Outdoor</label>
-        
+
 --fcc-editable-region--
           <input type="text" name="catphotourl" placeholder="cat photo URL" required>
           <button type="submit">Submit</button>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804e2.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804e2.md
index d5139e15ae4..9c3d9a6fe88 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804e2.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804e2.md
@@ -59,7 +59,7 @@ Although you have set the new `input` element's `type` attribute to `checkbox`,
 assert(!/\<\s*input\s+type\s*=\s*checkbox/i.test(code));
 ```
 
-The text ` Loving` should be located directly to the right of your checkbox. Make sure there is a space between the element and the text. You have either omitted the text or have a typo.
+The text `Loving` should be located directly to the right of your checkbox. Make sure there is a space between the element and the text. You have either omitted the text or have a typo.
 
 ```js
 const checkboxInputElem = $('input[type="checkbox"]')[0];
@@ -117,7 +117,7 @@ assert(
           <fieldset>
 --fcc-editable-region--
             <legend>What's your cat's personality?</legend>
-            
+
 --fcc-editable-region--
           </fieldset>
           <input type="text" name="catphotourl" placeholder="cat photo URL" required>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804e8.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804e8.md
index f679b0684e8..1f6967361a4 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804e8.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804e8.md
@@ -96,7 +96,7 @@ assert(extraSpacesRemoved.match(/No Copyright - freeCodeCamp\.org$/i));
     </main>
 --fcc-editable-region--
     <footer>
-      
+
     </footer>
 --fcc-editable-region--
   </body>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804eb.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804eb.md
index 9183fe37273..de5a1cd5464 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804eb.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5ef9b03c81a63668521804eb.md
@@ -9,7 +9,7 @@ dashedName: step-66
 
 The `title` element determines what browsers show in the title bar or tab for the page.
 
-Add a `title` element within the `head` element using the text below: 
+Add a `title` element within the `head` element using the text below:
 
 `CatPhotoApp`
 
@@ -48,7 +48,7 @@ assert(document.title && document.title.toLowerCase() === 'catphotoapp');
 <html>
 --fcc-editable-region--
   <head>
-    
+
   </head>
 --fcc-editable-region--
   <body>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5efada803cbd2bbdab94e332.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5efada803cbd2bbdab94e332.md
index 959d0f54118..b7623be513b 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5efada803cbd2bbdab94e332.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5efada803cbd2bbdab94e332.md
@@ -89,7 +89,7 @@ assert(!/\<img\s+.+\s+src\s*=\s*https:\/\/cdn\.freecodecamp\.org\/curriculum\/ca
         </ol>
 --fcc-editable-region--
         <figure>
-          
+
         </figure>
 --fcc-editable-region--
       </section>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f05a1d8e233dff4a68508d8.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f05a1d8e233dff4a68508d8.md
index 6dc9acb6906..0ffa306ff44 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f05a1d8e233dff4a68508d8.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f05a1d8e233dff4a68508d8.md
@@ -41,7 +41,7 @@ You should not add any attributes to either opening `label` tag.
 assert(code.match(/<label\s*>/g).length === 2);
 ```
 
-Your new `input` should have an `id` attribute with the value `outdoor`. 
+Your new `input` should have an `id` attribute with the value `outdoor`.
 
 ```js
 assert(document.querySelector('label input[id="outdoor"]'));
@@ -69,7 +69,7 @@ assert(
 );
 ```
 
-The label text for your new radio button must be exactly `Outdoor`. This includes capitalization. 
+The label text for your new radio button must be exactly `Outdoor`. This includes capitalization.
 
 ```js
 assert(document.querySelector('label > input[id="outdoor"]')?.nextSibling?.nodeValue?.replace(/^\s+|\s+$/g, '') === 'Outdoor');
@@ -124,7 +124,7 @@ assert(code.match(/<\/label>\s*<label\s*>\s*<input [^>]+>\s*Outdoor/i));
         <form action="https://freecatphotoapp.com/submit-cat-photo">
 --fcc-editable-region--
           <label><input id="indoor" type="radio"> Indoor</label>
-          
+
 --fcc-editable-region--
           <input type="text" name="catphotourl" placeholder="cat photo URL" required>
           <button type="submit">Submit</button>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f07c98cdb9413cbd4b16750.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f07c98cdb9413cbd4b16750.md
index 10b404ac3cb..9d0b1269dd3 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f07c98cdb9413cbd4b16750.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f07c98cdb9413cbd4b16750.md
@@ -73,7 +73,7 @@ assert(foundElems.length === 2);
         <p>See more <a target="_blank" href="https://freecatphotoapp.com">cat photos</a> in our gallery.</p>
         <a href="https://freecatphotoapp.com"><img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
       </section>
-      
+
 --fcc-editable-region--
     </main>
   </body>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f07fb1579dc934717801375.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f07fb1579dc934717801375.md
index efc5596c13d..22777df4431 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f07fb1579dc934717801375.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f07fb1579dc934717801375.md
@@ -90,7 +90,7 @@ assert($('main > section')[2].children.length === 0);
           <figcaption>Cats <strong>hate</strong> other cats.</figcaption>  
         </figure>
       </section>
-      
+
 --fcc-editable-region--
     </main>
   </body>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f0d48e7b435f13ab6550051.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f0d48e7b435f13ab6550051.md
index 1e8d266f9a7..8dff31c7300 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f0d48e7b435f13ab6550051.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f0d48e7b435f13ab6550051.md
@@ -90,7 +90,7 @@ assert(extraSpacesRemoved.match(/Is your cat an indoor or outdoor cat\??$/i));
         <form action="https://freecatphotoapp.com/submit-cat-photo">
 --fcc-editable-region--
           <fieldset>
-            
+
             <label><input id="indoor" type="radio" name="indoor-outdoor" value="indoor"> Indoor</label>
             <label><input id="outdoor" type="radio" name="indoor-outdoor" value="outdoor"> Outdoor</label>
           </fieldset>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f0d4ab1b435f13ab6550052.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f0d4ab1b435f13ab6550052.md
index 6fd655e37d7..78d51ca645c 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f0d4ab1b435f13ab6550052.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f0d4ab1b435f13ab6550052.md
@@ -116,7 +116,7 @@ assert(fieldsetChildren[0].length > fieldsetChildren[1].length);
             <label><input id="indoor" type="radio" name="indoor-outdoor" value="indoor"> Indoor</label>
             <label><input id="outdoor" type="radio" name="indoor-outdoor" value="outdoor"> Outdoor</label>
           </fieldset>
-          
+
 --fcc-editable-region--
           <input type="text" name="catphotourl" placeholder="cat photo URL" required>
           <button type="submit">Submit</button>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f0d4d04b435f13ab6550053.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f0d4d04b435f13ab6550053.md
index 3eafb90def9..f712e03e938 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f0d4d04b435f13ab6550053.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/5f0d4d04b435f13ab6550053.md
@@ -101,7 +101,7 @@ assert(
           </fieldset>
 --fcc-editable-region--
           <fieldset>
-            
+
           </fieldset>
 --fcc-editable-region--
           <input type="text" name="catphotourl" placeholder="cat photo URL" required>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/62bb4009e3458a128ff57d5d.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/62bb4009e3458a128ff57d5d.md
index 95edbbb0d73..0bbce614571 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/62bb4009e3458a128ff57d5d.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-by-building-a-cat-photo-app/62bb4009e3458a128ff57d5d.md
@@ -45,7 +45,7 @@ assert.notMatch(code, /<\/meta\s*>?/i);
 <html lang="en">
 --fcc-editable-region--
   <head>
-    
+
     <title>CatPhotoApp</title>
   </head>
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60f0286404aefb0562a4fdf9.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60f0286404aefb0562a4fdf9.md
index fb4a52f4b94..8269009ad39 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60f0286404aefb0562a4fdf9.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60f0286404aefb0562a4fdf9.md
@@ -47,7 +47,7 @@ assert.equal(title.text, 'Registration Form');
 <html lang="en">
   --fcc-editable-region--
   <head>
-    
+
   </head>
 --fcc-editable-region--
   <body>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60f5cb8875ab6a0610f05071.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60f5cb8875ab6a0610f05071.md
index 642dc33df7c..0ed9df41bb5 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60f5cb8875ab6a0610f05071.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60f5cb8875ab6a0610f05071.md
@@ -46,7 +46,7 @@ assert.exists(document.querySelector('fieldset + fieldset + fieldset'));
     <h1>Registration Form</h1>
     <p>Please fill out this form with the required information</p>
     <form method="post" action='https://register-demo.freecodecamp.org'>
-    
+
     </form>
   </body>
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60f80e0081e0f2052ae5b505.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60f80e0081e0f2052ae5b505.md
index 47e937edfc4..40095f5d197 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60f80e0081e0f2052ae5b505.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60f80e0081e0f2052ae5b505.md
@@ -11,8 +11,7 @@ Specifying the `type` attribute of a form element is important for the browser t
 
 Give the first two `input` elements a `type` attribute of `text`, the third a `type` attribute of `email`, and the fourth a `type` attribute of `password`.
 
-The `email` type only allows emails with a `@` and a `.` in the domain.
-The `password` type obscures the input, and warns if the site does not use HTTPS.
+The `email` type only allows emails with a `@` and a `.` in the domain. The `password` type obscures the input, and warns if the site does not use HTTPS.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60fab8367d35de04e5cb7929.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60fab8367d35de04e5cb7929.md
index 8d0c3bf7b9f..2840ffb6df3 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60fab8367d35de04e5cb7929.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60fab8367d35de04e5cb7929.md
@@ -21,13 +21,13 @@ You should add `I accept the terms and conditions` text to the label following t
 assert.equal(document.querySelector('fieldset:nth-child(3) + label')?.innerText.trim(), 'I accept the terms and conditions');
 ```
 
-You should use an `a` element to link to the terms and conditions. 
+You should use an `a` element to link to the terms and conditions.
 
 ```js
 assert.exists(document.querySelector('fieldset:nth-child(3) + label a'));
 ```
 
-You should put the new text immediately after the `input` element in the `label`. 
+You should put the new text immediately after the `input` element in the `label`.
 
 ```js
 assert.exists(document.querySelector('fieldset:nth-child(3) + label > input + a'));
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60fab9f17fa294054b74228c.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60fab9f17fa294054b74228c.md
index 2e8ce97de99..ceb87d98d43 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60fab9f17fa294054b74228c.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60fab9f17fa294054b74228c.md
@@ -9,11 +9,11 @@ dashedName: step-32
 
 Moving on to the final `fieldset`. What if you wanted to allow a user to upload a profile picture?
 
-Well, the `input` type `file` allows just that. Add a `label` with the text `Upload a profile picture: `, and nest an `input` accepting a file upload.
+Well, the `input` type `file` allows just that. Add a `label` with the text `Upload a profile picture:`, and nest an `input` accepting a file upload.
 
 # --hints--
 
-You should add a `label` with the text `Upload a profile picture: `.
+You should add a `label` with the text `Upload a profile picture:`.
 
 ```js
 assert.match(document.querySelector('fieldset:nth-child(3) > label')?.innerText, /Upload a profile picture:/i);
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60fabf0dd4959805dbae09e6.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60fabf0dd4959805dbae09e6.md
index 60cab5255ae..b78155b61bf 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60fabf0dd4959805dbae09e6.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60fabf0dd4959805dbae09e6.md
@@ -7,7 +7,7 @@ dashedName: step-33
 
 # --description--
 
-Add another `label` after the first, with the text `Input your age (years): `. Then, nest an `input` with the `type` of `number`.
+Add another `label` after the first, with the text `Input your age (years):`. Then, nest an `input` with the `type` of `number`.
 
 Next, add a `min` attribute to the `input` with a value of `13` because users under the age of 13 should not register. Also, users probably will not be over the age of 120; add a `max` attribute with a value of `120`.
 
@@ -21,7 +21,7 @@ You should add a `label` to the third `fieldset`, after the existing `label`.
 assert.exists(document.querySelector('fieldset:nth-child(3) > label + label'));
 ```
 
-You should give the `label` the text `Input your age (years): `.
+You should give the `label` the text `Input your age (years):`.
 
 ```js
 assert.equal(document.querySelector('fieldset:nth-child(3) > label:nth-child(2)')?.textContent?.trim(), 'Input your age (years):');
@@ -75,7 +75,7 @@ assert.equal(document.querySelector('fieldset:nth-child(3) > label:nth-child(2)
 --fcc-editable-region--
       <fieldset>
         <label>Upload a profile picture: <input type="file" /></label>
-        
+
       </fieldset>
 --fcc-editable-region--
       <label for="terms-and-conditions">
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60ffe69ee377c6055e192a46.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60ffe69ee377c6055e192a46.md
index 3d68aa8946a..ee7d64f80be 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60ffe69ee377c6055e192a46.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60ffe69ee377c6055e192a46.md
@@ -7,7 +7,7 @@ dashedName: step-57
 
 # --description--
 
-To style the submit button, you can use an _attribute_ selector, which selects an element based on the given attribute value. Here is an example:
+To style the submit button, you can use an _attribute_ selector, which selects an element based on the given attribute value. 여기 예시가 있습니다.
 
 ```css
 input[name="password"]
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60ffefd6479a3d084fb77cbc.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60ffefd6479a3d084fb77cbc.md
index a298600c7c9..cb7f01f0065 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60ffefd6479a3d084fb77cbc.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/60ffefd6479a3d084fb77cbc.md
@@ -7,7 +7,7 @@ dashedName: step-64
 
 # --description--
 
-Make the `input` for the terms and conditions `inline` by adding the appropriate class in the HTML. 
+Make the `input` for the terms and conditions `inline` by adding the appropriate class in the HTML.
 
 
 # --hints--
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/62b30924c5e4ef0daba23b5e.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/62b30924c5e4ef0daba23b5e.md
index a457b01efa4..aac80e0012f 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/62b30924c5e4ef0daba23b5e.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/62b30924c5e4ef0daba23b5e.md
@@ -7,7 +7,7 @@ dashedName: step-48
 
 # --description--
 
-The border of the last `fieldset` element looks a little out of place. You can select the last element of a specific type using the `last-of-type` CSS pseudo-class, like this: 
+The border of the last `fieldset` element looks a little out of place. You can select the last element of a specific type using the `last-of-type` CSS pseudo-class, like this:
 
 ```css
 p:last-of-type { }
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
index 6b0c6415fd6..c6cbf74e30c 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
@@ -7,8 +7,7 @@ dashedName: step-65
 
 # --description--
 
-Lastly change the text color of the `terms and conditions` link element to `#dfdfe2` by adding 
-a new selector in the CSS.
+Lastly change the text color of the `terms and conditions` link element to `#dfdfe2` by adding a new selector in the CSS.
 
 Well done! You have completed the final part of the _Registration Form_ practice project.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c5d7057c45f432fcdd46c.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c5d7057c45f432fcdd46c.md
index e5496418ff6..98afa6c6b3b 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c5d7057c45f432fcdd46c.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c5d7057c45f432fcdd46c.md
@@ -7,7 +7,7 @@ dashedName: step-7
 
 # --description--
 
-Using a class selector, give the `.cat-head` element a width of `205px` and a height of `180px`. Also, give it a border of `1px solid #000` and a `border-radius` of `46%`. 
+Using a class selector, give the `.cat-head` element a width of `205px` and a height of `180px`. Also, give it a border of `1px solid #000` and a `border-radius` of `46%`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c5e727e56e743c9aed4a1.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c5e727e56e743c9aed4a1.md
index 0d21ed75cc9..0e57e0aebc2 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c5e727e56e743c9aed4a1.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c5e727e56e743c9aed4a1.md
@@ -69,7 +69,7 @@ body {
 .cat-head {
 
 
-  
+
   background: linear-gradient(#5e5e5e 85%, #45454f 100%);
   width: 205px;
   height: 180px;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c5ffef5598d449b52ec12.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c5ffef5598d449b52ec12.md
index 20aef3f515a..9c460caa45f 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c5ffef5598d449b52ec12.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c5ffef5598d449b52ec12.md
@@ -47,7 +47,7 @@ assert(document.querySelectorAll('.cat-head div')[0]?.getAttribute('class') ===
     <main>
       --fcc-editable-region--
       <div class="cat-head">
-        
+
       </div>
       --fcc-editable-region--
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ce8bb4b35544d501c7184.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ce8bb4b35544d501c7184.md
index 647a1249cea..356b443cc39 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ce8bb4b35544d501c7184.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ce8bb4b35544d501c7184.md
@@ -52,7 +52,7 @@ assert(document.querySelectorAll('.cat-ears div')[1]?.classList.contains('cat-ri
       <div class="cat-head">
         --fcc-editable-region--
         <div class="cat-ears">
-          
+
         </div>
         --fcc-editable-region--
       </div>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ce9d790d2a44de5f99e04.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ce9d790d2a44de5f99e04.md
index 2d19224ae01..f868fcd598d 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ce9d790d2a44de5f99e04.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ce9d790d2a44de5f99e04.md
@@ -47,7 +47,7 @@ assert(document.querySelectorAll('.cat-left-ear div')[0]?.classList.contains('ca
         <div class="cat-ears">
           --fcc-editable-region--
           <div class="cat-left-ear">
-            
+
           </div>
           --fcc-editable-region--
           <div class="cat-right-ear"></div>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ceae4d57c214e6b03576c.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ceae4d57c214e6b03576c.md
index 5cbf4883709..deb18782568 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ceae4d57c214e6b03576c.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ceae4d57c214e6b03576c.md
@@ -50,7 +50,7 @@ assert(document.querySelectorAll('.cat-right-ear div')[0]?.classList.contains('c
           </div>
           --fcc-editable-region--
           <div class="cat-right-ear">
-            
+
           </div>
           --fcc-editable-region--
         </div>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cef0c2b98915094df7099.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cef0c2b98915094df7099.md
index a97c8ec5ba2..a0b737ac3d9 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cef0c2b98915094df7099.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cef0c2b98915094df7099.md
@@ -80,7 +80,7 @@ body {
   top: -26px;
   left: -31px;
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
   border-left: 35px solid transparent;
   border-right: 35px solid transparent;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf1206cac5f51804f49cf.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf1206cac5f51804f49cf.md
index 97ad6c4b1cf..3bcd393bf42 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf1206cac5f51804f49cf.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf1206cac5f51804f49cf.md
@@ -80,7 +80,7 @@ body {
   border-top-left-radius: 90px;
   border-top-right-radius: 10px;
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   border-left: 35px solid transparent;
   border-right: 35px solid transparent;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf48d8f8e1f535a1821d3.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf48d8f8e1f535a1821d3.md
index f54ad8d3560..dfce258d838 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf48d8f8e1f535a1821d3.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf48d8f8e1f535a1821d3.md
@@ -95,7 +95,7 @@ body {
 
 .cat-right-ear {
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   border-left: 35px solid transparent;
   border-right: 35px solid transparent;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf6cbca98e258da65c979.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf6cbca98e258da65c979.md
index 05fea993197..d4525731d1f 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf6cbca98e258da65c979.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf6cbca98e258da65c979.md
@@ -86,7 +86,7 @@ body {
   top: -26px;
   left: 163px;
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
   border-left: 35px solid transparent;
   border-right: 35px solid transparent;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf88aa884405a11ea5bcc.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf88aa884405a11ea5bcc.md
index 7dca3a2e288..bbd36a62759 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf88aa884405a11ea5bcc.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cf88aa884405a11ea5bcc.md
@@ -93,7 +93,7 @@ body {
   left: 163px;
   transform: rotate(45deg);
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   border-left: 35px solid transparent;
   border-right: 35px solid transparent;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cfc2b8e6fe95c20a819d5.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cfc2b8e6fe95c20a819d5.md
index e225bdcbbae..bb200fd1069 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cfc2b8e6fe95c20a819d5.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cfc2b8e6fe95c20a819d5.md
@@ -78,7 +78,7 @@ body {
   top: -26px;
   left: -31px;
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   border-top-left-radius: 90px;
   border-top-right-radius: 10px;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cfde6ac612e5d60391f50.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cfde6ac612e5d60391f50.md
index 7c184038a36..b892d61ca1d 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cfde6ac612e5d60391f50.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646cfde6ac612e5d60391f50.md
@@ -87,7 +87,7 @@ body {
   top: -26px;
   left: 163px;
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   transform: rotate(45deg);
   border-top-left-radius: 90px;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dd6f9caa862627dd87772.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dd6f9caa862627dd87772.md
index 2489d306347..8be0ea3110e 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dd6f9caa862627dd87772.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dd6f9caa862627dd87772.md
@@ -109,7 +109,7 @@ body {
 
 .cat-left-inner-ear {
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   border-left: 20px solid transparent;
   border-right: 20px solid transparent;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dd7cfd0cfac630c1dd520.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dd7cfd0cfac630c1dd520.md
index 3ba807162c8..7e24c8e937c 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dd7cfd0cfac630c1dd520.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dd7cfd0cfac630c1dd520.md
@@ -118,7 +118,7 @@ body {
   top: 22px;
   left: -20px;
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
   border-left: 20px solid transparent;
   border-right: 20px solid transparent;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dd9d9a729916460724f16.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dd9d9a729916460724f16.md
index ae3851f79db..f48ba0bd881 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dd9d9a729916460724f16.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dd9d9a729916460724f16.md
@@ -122,7 +122,7 @@ body {
 
 .cat-right-inner-ear {
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   border-left: 20px solid transparent;
   border-right: 20px solid transparent;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddab8afd73764f5241bbf.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddab8afd73764f5241bbf.md
index f2c79e4d571..12d8b78a661 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddab8afd73764f5241bbf.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddab8afd73764f5241bbf.md
@@ -131,7 +131,7 @@ body {
   top: 22px;
   left: -20px;
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   border-left: 20px solid transparent;
   border-right: 20px solid transparent;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddb61ff08366570cc5902.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddb61ff08366570cc5902.md
index 4e11aa617cc..5a2488dca6b 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddb61ff08366570cc5902.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddb61ff08366570cc5902.md
@@ -62,7 +62,7 @@ assert(document.querySelectorAll('.cat-eyes div')[1].classList.contains('cat-rig
         </div>
 
         --fcc-editable-region--
-        
+
         --fcc-editable-region--
       </div>
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddd3f9f97a0667b964bdb.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddd3f9f97a0667b964bdb.md
index eba5bc78b7d..9b995228d29 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddd3f9f97a0667b964bdb.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddd3f9f97a0667b964bdb.md
@@ -56,7 +56,7 @@ assert(document.querySelectorAll('.cat-left-eye div')[0]?.classList.contains('ca
         <div class="cat-eyes">
           --fcc-editable-region--
           <div class="cat-left-eye">
-            
+
           </div>
           --fcc-editable-region--
           <div class="cat-right-eye"></div>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dddfb3a301c66ec513c56.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dddfb3a301c66ec513c56.md
index 357c7638441..5bad715a154 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dddfb3a301c66ec513c56.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dddfb3a301c66ec513c56.md
@@ -59,7 +59,7 @@ assert(document.querySelectorAll('.cat-right-eye div')[0]?.classList.contains('c
           </div>
           --fcc-editable-region--
           <div class="cat-right-eye">
-            
+
           </div>
           --fcc-editable-region--
         </div>        
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddf888632fa67f1180940.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddf888632fa67f1180940.md
index 337882a376a..45ed732e12d 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddf888632fa67f1180940.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646ddf888632fa67f1180940.md
@@ -144,7 +144,7 @@ body {
 
 .cat-left-eye {
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   width: 30px;
   height: 40px;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de5dc8988076a1d992afd.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de5dc8988076a1d992afd.md
index 2a0f382824b..38088bba67e 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de5dc8988076a1d992afd.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de5dc8988076a1d992afd.md
@@ -141,7 +141,7 @@ body {
   top: 54px;
   left: 39px;
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   width: 30px;
   height: 40px;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de7b64467e96b7d35b5cd.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de7b64467e96b7d35b5cd.md
index 682a32fa6b0..1cae6709360 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de7b64467e96b7d35b5cd.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de7b64467e96b7d35b5cd.md
@@ -155,7 +155,7 @@ body {
 
 .cat-right-eye {
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   width: 30px;
   height: 40px;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de8478d6f796bfbdccfb2.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de8478d6f796bfbdccfb2.md
index 96f326f4ae5..b376c539f32 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de8478d6f796bfbdccfb2.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de8478d6f796bfbdccfb2.md
@@ -152,7 +152,7 @@ body {
   top: 54px;
   left: 134px;
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   width: 30px;
   height: 40px;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dea1c98c2426d43a705c3.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dea1c98c2426d43a705c3.md
index d1643f73295..b0243121123 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dea1c98c2426d43a705c3.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dea1c98c2426d43a705c3.md
@@ -178,7 +178,7 @@ body {
 
 .cat-left-inner-eye {
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   width: 10px;
   height: 20px;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dec359bef3b7811fba5a6.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dec359bef3b7811fba5a6.md
index 655321a68e2..f7933f8c3dc 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dec359bef3b7811fba5a6.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dec359bef3b7811fba5a6.md
@@ -17,7 +17,7 @@ Your `.cat-right-inner-eye` selector should have a `position` property set to `a
 assert(new __helpers.CSSHelp(document).getStyle('.cat-right-inner-eye')?.position === 'absolute')
 ```
 
-Your `.cat-right-inner-eye` selector should have a `top` property set to ` 8px`.
+Your `.cat-right-inner-eye` selector should have a `top` property set to `8px`.
 
 ```js
 assert(new __helpers.CSSHelp(document).getStyle('.cat-right-inner-eye')?.top === '8px')
@@ -189,7 +189,7 @@ body {
 
 .cat-right-inner-eye {
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   width: 10px;
   height: 20px;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dedbcba062079128b2ecc.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dedbcba062079128b2ecc.md
index 1a5818c80cb..143f0179cfe 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dedbcba062079128b2ecc.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dedbcba062079128b2ecc.md
@@ -55,9 +55,9 @@ assert(document.querySelectorAll('div')[11].classList.contains('cat-nose'))
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         --fcc-editable-region--
-        
+
         --fcc-editable-region--
       </div>
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646def5e863abf7a14501421.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646def5e863abf7a14501421.md
index 076b38b2608..bf02b9cf8fc 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646def5e863abf7a14501421.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646def5e863abf7a14501421.md
@@ -67,7 +67,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-nose')?.borderBottom === '
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
       </div>
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646df03c8f79337ab46f148b.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646df03c8f79337ab46f148b.md
index 4bede01bbdb..ef9238633b8 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646df03c8f79337ab46f148b.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646df03c8f79337ab46f148b.md
@@ -61,7 +61,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-nose')?.left === '85px')
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
       </div>
     </main>
@@ -190,7 +190,7 @@ body {
 
 .cat-nose {
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   border-left: 15px solid transparent;
   border-right: 15px solid transparent;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646df0cf26413a7b35e4b8b3.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646df0cf26413a7b35e4b8b3.md
index 978855a230f..0318f9d7f46 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646df0cf26413a7b35e4b8b3.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646df0cf26413a7b35e4b8b3.md
@@ -73,7 +73,7 @@ assert(/border-top-right-radius:\s*\d+%;/.test(code) === false);
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
       </div>
     </main>
@@ -205,7 +205,7 @@ body {
   top: 108px;
   left: 85px;
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   border-left: 15px solid transparent;
   border-right: 15px solid transparent;
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646df1d1aa4ae57bdf1869c4.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646df1d1aa4ae57bdf1869c4.md
index a0c65bd94b0..9d8231e174b 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646df1d1aa4ae57bdf1869c4.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646df1d1aa4ae57bdf1869c4.md
@@ -57,11 +57,11 @@ assert(document.querySelectorAll('div')[12].classList.contains('cat-mouth'))
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         --fcc-editable-region--
-        
+
         --fcc-editable-region--
       </div>
     </main>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dffd8ce9ac77ec1906f2e.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dffd8ce9ac77ec1906f2e.md
index fcc0f1e1740..3ef80ee39bb 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dffd8ce9ac77ec1906f2e.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646dffd8ce9ac77ec1906f2e.md
@@ -67,12 +67,12 @@ assert(document.querySelectorAll('.cat-mouth div')[1]?.classList.contains('cat-m
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         --fcc-editable-region--
         <div class="cat-mouth">
-          
+
         </div>
         --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0417322c0e04983a5149.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0417322c0e04983a5149.md
index 744dbf63545..a561360c7e9 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0417322c0e04983a5149.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0417322c0e04983a5149.md
@@ -67,7 +67,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-mouth-line-left')?.left ==
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -222,6 +222,6 @@ body {
 }
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f08293804a30685533c6f.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f08293804a30685533c6f.md
index 8e0ebd7d050..46ce69b8f2c 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f08293804a30685533c6f.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f08293804a30685533c6f.md
@@ -49,7 +49,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-mouth-line-left')?.transfo
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -208,7 +208,7 @@ body {
   top: 88px;
   left: 74px;
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 }
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f09293eb3230723a62f77.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f09293eb3230723a62f77.md
index 1e6cf5bf9b4..03853c3938b 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f09293eb3230723a62f77.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f09293eb3230723a62f77.md
@@ -67,7 +67,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-mouth-line-right')?.left =
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0c9a1e3360092d1bbd33.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0c9a1e3360092d1bbd33.md
index c33170ee270..2a01ed169d2 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0c9a1e3360092d1bbd33.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0c9a1e3360092d1bbd33.md
@@ -49,7 +49,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-mouth-line-right')?.transf
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -215,7 +215,7 @@ body {
   top: 88px;
   left: 91px;
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 }
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0ce5737243098ad6e494.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0ce5737243098ad6e494.md
index 2f7f9385061..3d75bf77a02 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0ce5737243098ad6e494.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0ce5737243098ad6e494.md
@@ -57,7 +57,7 @@ assert(document.querySelectorAll('div')[15].classList.contains('cat-whiskers'))
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -66,7 +66,7 @@ assert(document.querySelectorAll('div')[15].classList.contains('cat-whiskers'))
         </div>
 
         --fcc-editable-region--
-        
+
         --fcc-editable-region--
 
       </div>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0ef13604420a8744f7d4.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0ef13604420a8744f7d4.md
index 5c47bf2cadf..6e28a86659a 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0ef13604420a8744f7d4.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0ef13604420a8744f7d4.md
@@ -67,7 +67,7 @@ assert(document.querySelectorAll('.cat-whiskers div')[1].classList.contains('cat
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -77,7 +77,7 @@ assert(document.querySelectorAll('.cat-whiskers div')[1].classList.contains('cat
 
         --fcc-editable-region--
         <div class="cat-whiskers">
-          
+
         </div>
         --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0f7c5933560af8e7e380.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0f7c5933560af8e7e380.md
index e9bbe990649..291e0fbd52d 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0f7c5933560af8e7e380.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f0f7c5933560af8e7e380.md
@@ -74,7 +74,7 @@ assert(document.querySelectorAll('.cat-whiskers-left div')[2].classList.contains
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -85,7 +85,7 @@ assert(document.querySelectorAll('.cat-whiskers-left div')[2].classList.contains
         <div class="cat-whiskers">
           --fcc-editable-region--
           <div class="cat-whiskers-left">
-            
+
           </div>
           --fcc-editable-region--
           <div class="cat-whiskers-right"></div>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f102bf87b350b593baa72.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f102bf87b350b593baa72.md
index 7f828dd634e..820cbd44d12 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f102bf87b350b593baa72.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f102bf87b350b593baa72.md
@@ -73,7 +73,7 @@ assert(document.querySelectorAll('.cat-whiskers-right div')[2].classList.contain
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -89,7 +89,7 @@ assert(document.querySelectorAll('.cat-whiskers-right div')[2].classList.contain
           </div>
           --fcc-editable-region--
           <div class="cat-whiskers-right">
-            
+
           </div>
           --fcc-editable-region--
         </div>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f107abb89d00bb99f387a.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f107abb89d00bb99f387a.md
index e8d6b0d66c9..741c609e6b3 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f107abb89d00bb99f387a.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f107abb89d00bb99f387a.md
@@ -67,7 +67,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whiskers-left div')?.backg
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f12da0b4c5d0ca162834a.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f12da0b4c5d0ca162834a.md
index 7fa10c7e7c6..b1c107c9c2e 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f12da0b4c5d0ca162834a.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f12da0b4c5d0ca162834a.md
@@ -67,7 +67,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whisker-left-top')?.left =
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -261,6 +261,6 @@ body {
 }
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f135eab69d90d0c6d4e9b.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f135eab69d90d0c6d4e9b.md
index 72dfb269e39..9ae2339b4dc 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f135eab69d90d0c6d4e9b.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f135eab69d90d0c6d4e9b.md
@@ -49,7 +49,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whisker-left-top')?.transf
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -247,7 +247,7 @@ body {
   top: 120px;
   left: 52px;
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 }
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f159b2cffb21150b927cb.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f159b2cffb21150b927cb.md
index 95846073540..c0b941997a6 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f159b2cffb21150b927cb.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f159b2cffb21150b927cb.md
@@ -67,7 +67,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whisker-left-middle')?.lef
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -268,6 +268,6 @@ body {
 }
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f164bf100dd11d226161f.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f164bf100dd11d226161f.md
index f7b2bd52897..0a537b0812d 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f164bf100dd11d226161f.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f164bf100dd11d226161f.md
@@ -49,7 +49,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whisker-left-middle')?.tra
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f1764e2f1d212ba9785a7.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f1764e2f1d212ba9785a7.md
index 8594f418461..651a9405914 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f1764e2f1d212ba9785a7.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f1764e2f1d212ba9785a7.md
@@ -67,7 +67,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whisker-left-bottom')?.lef
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -275,6 +275,6 @@ body {
 }
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f1802a09a171332e14630.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f1802a09a171332e14630.md
index 8921467909e..bc03c983374 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f1802a09a171332e14630.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f1802a09a171332e14630.md
@@ -49,7 +49,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whisker-left-bottom')?.tra
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -261,7 +261,7 @@ body {
   top: 134px;
   left: 52px;
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 }
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4d6c42dc5f214f4e7444.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4d6c42dc5f214f4e7444.md
index a2c9d666be6..e365b97d693 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4d6c42dc5f214f4e7444.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4d6c42dc5f214f4e7444.md
@@ -67,7 +67,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whisker-right-top')?.left
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -282,6 +282,6 @@ body {
 }
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4e46e81f7021d5fd9c1d.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4e46e81f7021d5fd9c1d.md
index 15a27f54dcd..f13a5c03ba4 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4e46e81f7021d5fd9c1d.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4e46e81f7021d5fd9c1d.md
@@ -49,7 +49,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whisker-right-top')?.trans
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -268,7 +268,7 @@ body {
   top: 120px;
   left: 109px;
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 }
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4f6a14e3c522d130a0d2.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4f6a14e3c522d130a0d2.md
index fdf7dc60c56..2f79cbf9301 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4f6a14e3c522d130a0d2.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4f6a14e3c522d130a0d2.md
@@ -67,7 +67,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whisker-right-middle')?.le
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -289,6 +289,6 @@ body {
 }
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4fe12b7985232bf475a5.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4fe12b7985232bf475a5.md
index 2457de85e75..a7d861a1258 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4fe12b7985232bf475a5.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f4fe12b7985232bf475a5.md
@@ -49,7 +49,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whisker-right-middle')?.tr
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -275,7 +275,7 @@ body {
   top: 127px;
   left: 109px;
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 }
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f507e4d1cd323f17db4fc.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f507e4d1cd323f17db4fc.md
index 800702880f5..d0cf2b64a3f 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f507e4d1cd323f17db4fc.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f507e4d1cd323f17db4fc.md
@@ -8,7 +8,7 @@ dashedName: step-81
 # --description--
 
 Use class selector to target the `.cat-whisker-right-bottom` element, then move it into place with a `position` of `absolute`, a `top` of `134px`, and a `left` of `109px`.
- 
+
 
 # --hints--
 
@@ -68,7 +68,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whisker-right-bottom')?.le
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -297,6 +297,6 @@ body {
 }
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f516dbfc1342495515625.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f516dbfc1342495515625.md
index b38c6f41f2e..3bf9207660e 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f516dbfc1342495515625.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646f516dbfc1342495515625.md
@@ -51,7 +51,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whisker-right-bottom')?.tr
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
@@ -284,7 +284,7 @@ body {
   top: 134px;
   left: 109px;
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 }
 ```
@@ -319,7 +319,7 @@ body {
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/6476fc5cf14b276e6d04e82a.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/6476fc5cf14b276e6d04e82a.md
index 5e47f1c7b23..a8a137321fe 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/6476fc5cf14b276e6d04e82a.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/6476fc5cf14b276e6d04e82a.md
@@ -7,7 +7,7 @@ dashedName: step-13
 
 # --description--
 
-Use a class selector to give your `.box` element a width of `200px`, a height of `600px`, and a background color of `#000`. Also, give it a `position` of `absolute`, a `top` of `800px` and a `left` of `650px`. 
+Use a class selector to give your `.box` element a width of `200px`, a height of `600px`, and a background color of `#000`. Also, give it a `position` of `absolute`, a `top` of `800px` and a `left` of `650px`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/6477062778c85972eb648030.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/6477062778c85972eb648030.md
index 7e91e8b9bfb..a7597864564 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/6477062778c85972eb648030.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/6477062778c85972eb648030.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-You should now center the cat head. 
+You should now center the cat head.
 
 Give the `.cat-head` element a position property set to `absolute`. Set a value of `0` for the `right`, `left`, `top`, `bottom` properties, then set its `margin` property on all sides to `auto`. That's one way to center an element vertically and horizontally using CSS positioning.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/64a2687ef267e5934a2f93e3.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/64a2687ef267e5934a2f93e3.md
index 214264a4238..04963838659 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/64a2687ef267e5934a2f93e3.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/64a2687ef267e5934a2f93e3.md
@@ -67,9 +67,9 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-mouth div')?.border === '2
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
-          
+
         <div class="cat-mouth">
           <div class="cat-mouth-line-left"></div>
           <div class="cat-mouth-line-right"></div>
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/64a26ac5540c5493f4641f10.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/64a26ac5540c5493f4641f10.md
index 96bf699b91c..d46fbf6da0d 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/64a26ac5540c5493f4641f10.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/64a26ac5540c5493f4641f10.md
@@ -56,9 +56,9 @@ assert.match(code, /border-radius:\s*190%\/190px\s*150px\s*0\s*0\s*;?/)
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
-          
+
         <div class="cat-mouth">
           <div class="cat-mouth-line-left"></div>
           <div class="cat-mouth-line-right"></div>
@@ -206,7 +206,7 @@ body {
   height: 50px;
   border: 2px solid #000;
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 }
 ```
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/64a3bcbc83e574b58c8ed048.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/64a3bcbc83e574b58c8ed048.md
index 1998ef497a0..4f3a8d2de51 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/64a3bcbc83e574b58c8ed048.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/64a3bcbc83e574b58c8ed048.md
@@ -67,7 +67,7 @@ assert(new __helpers.CSSHelp(document).getStyle('.cat-whiskers-right div')?.back
             <div class="cat-right-inner-eye"></div>
           </div>
         </div>
-        
+
         <div class="cat-nose"></div>
 
         <div class="cat-mouth">
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd6343fb42013d99bcd7f3.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd6343fb42013d99bcd7f3.md
index 6b933db49dd..ae59503cca6 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd6343fb42013d99bcd7f3.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd6343fb42013d99bcd7f3.md
@@ -11,7 +11,7 @@ Within your `body` element, nest a `section` element within a `main` element.
 
 # --hints--
 
-The first element inside the `body` element should be your `main` element. 
+The first element inside the `body` element should be your `main` element.
 
 ```js
 assert(document.querySelector('body')?.children?.[0]?.localName === 'main');
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd778081276b59d59abad6.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd778081276b59d59abad6.md
index c2f94c4d531..413771781f2 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd778081276b59d59abad6.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd778081276b59d59abad6.md
@@ -7,7 +7,7 @@ dashedName: step-13
 
 # --description--
 
-In your first `tr`, add a `th` element with the text `Cash This is the cash we currently have on hand.`. Wrap all of that text except `Cash ` in a `span` element with the `class` set to `description`.
+In your first `tr`, add a `th` element with the text `Cash This is the cash we currently have on hand.`. Wrap all of that text except `Cash` in a `span` element with the `class` set to `description`.
 
 Following that, add three `td` elements with the following text (in order): `$25`, `$30`, `$28`. Give the third `td` element a `class` attribute set to `current`.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd77f7ad2aeb5ae34d07d6.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd77f7ad2aeb5ae34d07d6.md
index 6c5d1804d52..65782d0b1e3 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd77f7ad2aeb5ae34d07d6.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd77f7ad2aeb5ae34d07d6.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-In your second `tr` element, add a `th` element with the text `Checking Our primary transactional account.`. Wrap that text, except for `Checking `, in a `span` element with the `class` attribute set to `description`.
+In your second `tr` element, add a `th` element with the text `Checking Our primary transactional account.`. Wrap that text, except for `Checking`, in a `span` element with the `class` attribute set to `description`.
 
 Following that, add three `td` elements with the following text (in order): `$54`, `$56`, `$53`. Give the third `td` element a `class` attribute set to `current`.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd78621573aa5e8b512f5e.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd78621573aa5e8b512f5e.md
index f36d0c0c001..e0aef0b4072 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd78621573aa5e8b512f5e.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd78621573aa5e8b512f5e.md
@@ -7,7 +7,7 @@ dashedName: step-15
 
 # --description--
 
-In your third `tr` element, add a `th` element with the text `Savings Funds set aside for emergencies.`. Wrap that text, except for `Savings `, in a `span` element with the `class` attribute set to `description`.
+In your third `tr` element, add a `th` element with the text `Savings Funds set aside for emergencies.`. Wrap that text, except for `Savings`, in a `span` element with the `class` attribute set to `description`.
 
 Following that, add three `td` elements with the following text (in order): `$500`, `$650`, `$728`. Give the third `td` element a `class` attribute set to `current`.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd933ba685de776a94997e.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd933ba685de776a94997e.md
index 59d25200fff..58a2b1e9bc7 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd933ba685de776a94997e.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd933ba685de776a94997e.md
@@ -7,7 +7,7 @@ dashedName: step-21
 
 # --description--
 
-Within the first `tr`, add a `th` element with the text `Loans The outstanding balance on our startup loan.`. Wrap that text, except for `Loans `, within a `span` element with the `class` set to `description`.
+Within the first `tr`, add a `th` element with the text `Loans The outstanding balance on our startup loan.`. Wrap that text, except for `Loans`, within a `span` element with the `class` set to `description`.
 
 Add three `td` elements below that, and give them the following text, in order: `$500`, `$250`, and `$0`. Give the third `td` element a `class` set to `current`.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd94056e0355785fbba4d3.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd94056e0355785fbba4d3.md
index 735106d54f9..1f8839c68a9 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd94056e0355785fbba4d3.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd94056e0355785fbba4d3.md
@@ -7,7 +7,7 @@ dashedName: step-22
 
 # --description--
 
-Within the second `tr`, add a `th` element with the text `Expenses Annual anticipated expenses, such as payroll.`. Wrap that text, except for `Expenses `, within a `span` element with the `class` set to `description`.
+Within the second `tr`, add a `th` element with the text `Expenses Annual anticipated expenses, such as payroll.`. Wrap that text, except for `Expenses`, within a `span` element with the `class` set to `description`.
 
 Add three `td` elements below that, and give them the following text, in order: `$200`, `$300`, and `$400`. Give the third `td` element a `class` set to `current`.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd986ddbcbd47ba8fbc5ec.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd986ddbcbd47ba8fbc5ec.md
index 4598e8a76f9..a7289e5738c 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd986ddbcbd47ba8fbc5ec.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fd986ddbcbd47ba8fbc5ec.md
@@ -7,7 +7,7 @@ dashedName: step-23
 
 # --description--
 
-Within the third `tr`, add a `th` element with the text `Credit The outstanding balance on our credit card.`. Wrap that text, except for `Credit `, within a `span` element with the `class` set to `description`.
+Within the third `tr`, add a `th` element with the text `Credit The outstanding balance on our credit card.`. Wrap that text, except for `Credit`, within a `span` element with the `class` set to `description`.
 
 Add three `td` elements below that, and give them the following text, in order: `$50`, `$50`, and `$75`. Give the third `td` element a `class` set to `current`.
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fdac1e31692f9a9ad97295.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fdac1e31692f9a9ad97295.md
index fbb21a27953..546bcc8998d 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fdac1e31692f9a9ad97295.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fdac1e31692f9a9ad97295.md
@@ -19,7 +19,7 @@ Your `span[class~="sr-only"]` selector should have a `clip` property set to `rec
 assert(new __helpers.CSSHelp(document).getStyle('span[class~="sr-only"]')?.getPropertyValue('clip') === 'rect(1px, 1px, 1px, 1px)');
 ```
 
-Your `span[class~="sr-only"] ` selector should have a `clip-path` property set to `inset(50%)`.
+Your `span[class~="sr-only"]` selector should have a `clip-path` property set to `inset(50%)`.
 
 ```js
 assert(new __helpers.CSSHelp(document).getStyle('span[class~="sr-only"]')?.getPropertyValue('clip-path') === 'inset(50%)');
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fdaf9ff894b6a084ecdc1b.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fdaf9ff894b6a084ecdc1b.md
index 0a5c32accf8..2865fbb9688 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fdaf9ff894b6a084ecdc1b.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fdaf9ff894b6a084ecdc1b.md
@@ -159,7 +159,7 @@ span[class~="sr-only"] {
   clip-path: inset(50%);
   height: 1px;
   width: 1px;
-  
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fdafe6f07fd7a1c6785bc2.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fdafe6f07fd7a1c6785bc2.md
index dba20e18298..5a05cb1e815 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fdafe6f07fd7a1c6785bc2.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-more-about-css-pseudo-selectors-by-building-a-balance-sheet/61fdafe6f07fd7a1c6785bc2.md
@@ -167,7 +167,7 @@ span[class~="sr-only"] {
   width: 1px;
   overflow: hidden;
   white-space: nowrap;
-  
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-responsive-web-design-by-building-a-piano/612e813b3ba67633222cbe54.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-responsive-web-design-by-building-a-piano/612e813b3ba67633222cbe54.md
index 5fa1a5eb88e..97c0418be13 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-responsive-web-design-by-building-a-piano/612e813b3ba67633222cbe54.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-responsive-web-design-by-building-a-piano/612e813b3ba67633222cbe54.md
@@ -7,7 +7,7 @@ dashedName: step-6
 
 # --description--
 
-Remember that a `class` attribute can have multiple values. To separate your white keys from your black keys, you'll add a second `class` value of `black--key`. Add this to your second, third, fifth, sixth, and seventh `.key` elements. 
+Remember that a `class` attribute can have multiple values. To separate your white keys from your black keys, you'll add a second `class` value of `black--key`. Add this to your second, third, fifth, sixth, and seventh `.key` elements.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-the-css-box-model-by-building-a-rothko-painting/60a3e3396c7b40068ad6996a.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-the-css-box-model-by-building-a-rothko-painting/60a3e3396c7b40068ad6996a.md
index 72537f155ec..d34f1b0e2ca 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-the-css-box-model-by-building-a-rothko-painting/60a3e3396c7b40068ad6996a.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-the-css-box-model-by-building-a-rothko-painting/60a3e3396c7b40068ad6996a.md
@@ -19,7 +19,7 @@ Your code should have a `<!DOCTYPE html>` declaration.
 assert(code.match(/<!DOCTYPE html>/i));
 ```
 
-You should have an opening `<html>` tag with a `lang` attribute of `en`.
+`en` 속성을 가진 `lang`를 오프닝 `<html>` 태그 뒤에 추가합니다.
 
 ```js
 assert(code.match(/<html\s+lang\s*=\s*('|")en\1\s*>/gi));
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-the-css-box-model-by-building-a-rothko-painting/60a3e3396c7b40068ad69971.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-the-css-box-model-by-building-a-rothko-painting/60a3e3396c7b40068ad69971.md
index 5692e34e757..c7c6f84ded2 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-the-css-box-model-by-building-a-rothko-painting/60a3e3396c7b40068ad69971.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-the-css-box-model-by-building-a-rothko-painting/60a3e3396c7b40068ad69971.md
@@ -9,9 +9,7 @@ dashedName: step-8
 
 Time for CSS.
 
-Even though your `<div>` has no text, it's still treated as a box with content.
-Write a CSS rule that uses the `.canvas` class selector and set its `width` to 500 pixels.
-Here's a CSS rule that sets the width of the class `card` to 300 pixels:
+Even though your `<div>` has no text, it's still treated as a box with content. Write a CSS rule that uses the `.canvas` class selector and set its `width` to 500 pixels. Here's a CSS rule that sets the width of the class `card` to 300 pixels:
 
 ```css
 .card {
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f2d4150fe0d4cbd0f2628.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f2d4150fe0d4cbd0f2628.md
index fad9ec93bdc..272ccd55ffc 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f2d4150fe0d4cbd0f2628.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f2d4150fe0d4cbd0f2628.md
@@ -51,7 +51,7 @@ assert(document.querySelector('p')?.innerText === '8 servings per container');
 
 <body>
   <h1>Nutrition Facts</h1>
-    
+
 </body>
 </html>
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f34948891834dd77655a6.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f34948891834dd77655a6.md
index b01720ed23b..2ae877fe385 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f34948891834dd77655a6.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f34948891834dd77655a6.md
@@ -52,7 +52,7 @@ assert(document.querySelectorAll('p')?.[1]?.innerText === 'Serving size 2/3 cup
 <body>
   <h1>Nutrition Facts</h1>
   <p>8 servings per container</p>
-    
+
 </body>
 </html>
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f4bfb9de4a16703b56eb6.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f4bfb9de4a16703b56eb6.md
index a1a3c1321f5..686336b2dca 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f4bfb9de4a16703b56eb6.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f4bfb9de4a16703b56eb6.md
@@ -7,7 +7,7 @@ dashedName: step-23
 
 # --description--
 
-Now we can add the horizontal spacing using `flex`. In your `p` selector, add a `display` property set to `flex` and a `justify-content` property set to `space-between`. 
+Now we can add the horizontal spacing using `flex`. In your `p` selector, add a `display` property set to `flex` and a `justify-content` property set to `space-between`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f50473cc0196c6dd3892a.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f50473cc0196c6dd3892a.md
index 2f835f89e70..971d93624cb 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f50473cc0196c6dd3892a.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f50473cc0196c6dd3892a.md
@@ -9,7 +9,7 @@ dashedName: step-28
 
 You may notice there is still a small border at the bottom of your `.large` element. To reset this, give your `.large, .medium` selector a `border` property set to `0`.
 
-Note: the `medium`(medium) class will be utilized later for the thinner bars of the nutrition label. 
+Note: the `medium`(medium) class will be utilized later for the thinner bars of the nutrition label.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f7ad94380408d971d14f6.md b/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f7ad94380408d971d14f6.md
index 4172622316e..9c987e76847 100644
--- a/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f7ad94380408d971d14f6.md
+++ b/curriculum/challenges/korean/14-responsive-web-design-22/learn-typography-by-building-a-nutrition-label/615f7ad94380408d971d14f6.md
@@ -7,7 +7,7 @@ dashedName: step-49
 
 # --description--
 
-The `:not` pseudo-selector can be used to select all elements that do not match the given CSS rule. 
+The `:not` pseudo-selector can be used to select all elements that do not match the given CSS rule.
 
 ```css
 div:not(#example) {
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
index 76748f9e24e..0ea718d968a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
@@ -24,14 +24,14 @@ Your application should show different messages depending on the price of the it
 
 |    Currency Unit    |       Amount       |
 |:-------------------:|:------------------:|
-|        Penny        |    $0.01 (PENNY)   |
-|        Nickle       |   $0.05 (NICKEL)   |
-|         Dime        |     $0.1 (DIME)    |
-|       Quarter       |   $0.25 (QUARTER)  |
-|        Dollar       |      $1 (ONE)      |
-|     Five Dollars    |      $5 (FIVE)     |
-|     Ten Dollars     |      $10 (TEN)     |
-|    Twenty Dollars   |    $20 (TWENTY)    |
+|        Penny        |   $0.01 (PENNY)    |
+|       Nickle        |   $0.05 (NICKEL)   |
+|        Dime         |    $0.1 (DIME)     |
+|       Quarter       |  $0.25 (QUARTER)   |
+|       Dollar        |      $1 (ONE)      |
+|    Five Dollars     |     $5 (FIVE)      |
+|     Ten Dollars     |     $10 (TEN)      |
+|   Twenty Dollars    |    $20 (TWENTY)    |
 | One Hundred Dollars | $100 (ONE HUNDRED) |
 
 **Objective:** Build an app that is functionally similar to <a href="https://cash-register.freecodecamp.rocks" target="_blank" rel="noopener noreferrer nofollow">https://cash-register.freecodecamp.rocks</a>
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/build-a-roman-numeral-converter-project/build-a-roman-numeral-converter.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/build-a-roman-numeral-converter-project/build-a-roman-numeral-converter.md
index 46e301fc5ec..b431ce90538 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/build-a-roman-numeral-converter-project/build-a-roman-numeral-converter.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/build-a-roman-numeral-converter-project/build-a-roman-numeral-converter.md
@@ -11,7 +11,7 @@ dashedName: build-a-roman-numeral-converter
 Roman numerals are based on seven symbols and can be written using various combinations to represent Arabic numerals. For example:
 
 | Roman numerals | Arabic numerals |
-|----------------|-----------------|
+| -------------- | --------------- |
 | M              | 1000            |
 | CM             | 900             |
 | D              | 500             |
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508577f69f41409275f877.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508577f69f41409275f877.md
index 4d79a1e921c..4839e059df3 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508577f69f41409275f877.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508577f69f41409275f877.md
@@ -7,7 +7,7 @@ dashedName: step-13
 
 # --description--
 
-The next step in calculating the mean is to divide the sum of numbers by the count of numbers in the list. 
+The next step in calculating the mean is to divide the sum of numbers by the count of numbers in the list.
 
 Declare a `mean` variable and assign it the value of `sum` divided by the length of `array`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350866cce4c6d43bdf607c8.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350866cce4c6d43bdf607c8.md
index a1c9b9d616a..443f0323e73 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350866cce4c6d43bdf607c8.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350866cce4c6d43bdf607c8.md
@@ -118,7 +118,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
 
 }
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508750f040a348a440a0bf.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508750f040a348a440a0bf.md
index a9cab9bc069..3180484e3eb 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508750f040a348a440a0bf.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508750f040a348a440a0bf.md
@@ -126,7 +126,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
 
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635089e3bd3e144f2db4094f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635089e3bd3e144f2db4094f.md
index 33abe560fce..f526d6e8f70 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635089e3bd3e144f2db4094f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635089e3bd3e144f2db4094f.md
@@ -126,7 +126,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
 
   document.querySelector("#mean").textContent = mean;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508abbff1c4c5210d68cc5.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508abbff1c4c5210d68cc5.md
index 6bdf365151b..8b54840f3fc 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508abbff1c4c5210d68cc5.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508abbff1c4c5210d68cc5.md
@@ -128,7 +128,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
 
   document.querySelector("#mean").textContent = mean;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508bb4afb069534e81f33b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508bb4afb069534e81f33b.md
index 3d4bf459e36..850a88d9cf2 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508bb4afb069534e81f33b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508bb4afb069534e81f33b.md
@@ -124,7 +124,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
 
   document.querySelector("#mean").textContent = mean;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
index b4bea0fa5d9..d285852f92a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
@@ -126,7 +126,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
 
   document.querySelector("#mean").textContent = mean;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
index e32a5443b49..97bb9ef0e04 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
@@ -142,7 +142,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
 
   document.querySelector("#mean").textContent = mean;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635091f8dbf554575fb5aa0c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635091f8dbf554575fb5aa0c.md
index caaec2b7003..5306ff72463 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635091f8dbf554575fb5aa0c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635091f8dbf554575fb5aa0c.md
@@ -122,7 +122,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
 
   document.querySelector("#mean").textContent = mean;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e80e024e89111600edfb.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e80e024e89111600edfb.md
index 3971bb11b5c..8a691bd9d5c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e80e024e89111600edfb.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e80e024e89111600edfb.md
@@ -136,7 +136,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e93db104661305c5f658.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e93db104661305c5f658.md
index da21fd58605..8473932561c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e93db104661305c5f658.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e93db104661305c5f658.md
@@ -132,7 +132,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
index ac0e2ac90dd..cca770ac426 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
@@ -141,7 +141,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ea3a5b79e614ee2282fd.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ea3a5b79e614ee2282fd.md
index ccf7d6d5418..fec7d654aa5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ea3a5b79e614ee2282fd.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ea3a5b79e614ee2282fd.md
@@ -152,7 +152,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ebd3ab962c168a122e85.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ebd3ab962c168a122e85.md
index 87a51007f65..b7b8aa2f930 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ebd3ab962c168a122e85.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ebd3ab962c168a122e85.md
@@ -146,7 +146,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
index d4090b5711c..38eab8ab27a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
@@ -155,7 +155,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ecef9f045519063da9b3.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ecef9f045519063da9b3.md
index a25b1801a66..381683844e0 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ecef9f045519063da9b3.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ecef9f045519063da9b3.md
@@ -144,7 +144,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
index 7663e663235..89f9c9c5683 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
@@ -148,7 +148,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ee566a59d31d24bde74b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ee566a59d31d24bde74b.md
index 3fb34425378..cae9634ee94 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ee566a59d31d24bde74b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ee566a59d31d24bde74b.md
@@ -144,7 +144,7 @@ const getMode = (array) => {
   const mode = Object.keys(counts).filter(
     (el) => counts[el] === counts[highest]
   );
-  
+
 }
 --fcc-editable-region--
 
@@ -153,7 +153,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
index 027d2d6cb76..a4b0e3eee91 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
@@ -143,7 +143,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
 --fcc-editable-region--
   const mean = getMean(numbers);
   const median = getMedian(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
index 2cacfe6dd2c..e395102a36f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
@@ -182,7 +182,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
   const mode = getMode(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
index 0cc82e6eb43..1bd4f6e9c83 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
@@ -146,7 +146,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
 --fcc-editable-region--
   const mean = getMean(numbers);
   const median = getMedian(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2a24eb71b24284ca2b6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2a24eb71b24284ca2b6.md
index 2e72d79df94..c19384026eb 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2a24eb71b24284ca2b6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2a24eb71b24284ca2b6.md
@@ -164,7 +164,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
   const mode = getMode(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
index 6af6c443940..9687bba9a9e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
@@ -165,7 +165,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
   const mode = getMode(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
index a269cd04cb4..fdc879e82b6 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
@@ -176,7 +176,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
   const mode = getMode(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
index e2a338fb02b..2d66881b2c4 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
@@ -173,7 +173,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
   const mode = getMode(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
index 3cca7355590..07069778076 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
@@ -199,7 +199,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
   const mode = getMode(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
index c7c9986ba4c..7a9b4437bd8 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
@@ -156,7 +156,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
 --fcc-editable-region--
   const mean = getMean(numbers);
   const median = getMedian(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ffe4cfafa72d595a0007.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ffe4cfafa72d595a0007.md
index 0b66945d484..40bae5a85aa 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ffe4cfafa72d595a0007.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ffe4cfafa72d595a0007.md
@@ -174,7 +174,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
   const mode = getMode(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6353004b235d7a2e0b913f2b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6353004b235d7a2e0b913f2b.md
index 8865585e9f2..daa8ca0fda1 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6353004b235d7a2e0b913f2b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6353004b235d7a2e0b913f2b.md
@@ -176,7 +176,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
   const mode = getMode(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6353024f5eab012fa2f57eec.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6353024f5eab012fa2f57eec.md
index b302a867145..0effb1d2fe9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6353024f5eab012fa2f57eec.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6353024f5eab012fa2f57eec.md
@@ -159,7 +159,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
   const mode = getMode(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6353028147d3c7309017216a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6353028147d3c7309017216a.md
index 40ef84c0eb0..e2e2f24115e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6353028147d3c7309017216a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6353028147d3c7309017216a.md
@@ -158,7 +158,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
   const mode = getMode(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
index a3830b2fb8c..fac72b8c424 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
@@ -162,7 +162,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
 --fcc-editable-region--
   const mean = getMean(numbers);
   const median = getMedian(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
index c6d82667489..13bf8c7c185 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
@@ -172,7 +172,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
   const mode = getMode(numbers);
@@ -326,7 +326,7 @@ const calculate = () => {
   const value = document.querySelector("#numbers").value;
   const array = value.split(/,\s*/g);
   const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
-  
+
   const mean = getMean(numbers);
   const median = getMedian(numbers);
   const mode = getMode(numbers);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
index aff82179418..4d7b02969ec 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
@@ -7,7 +7,7 @@ dashedName: step-4
 
 # --description--
 
-To populate the forum leaderboard with data, you will need to request the data from an API. This is known as an <dfn>asynchronous</dfn> operation, which means that tasks execute independently of the main program flow. 
+To populate the forum leaderboard with data, you will need to request the data from an API. This is known as an <dfn>asynchronous</dfn> operation, which means that tasks execute independently of the main program flow.
 
 You can use the `async` keyword to create an asynchronous function, which returns a promise.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
index 7e7f85d8836..eaefac7e396 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-To view the data results, log the `data` variable to the console inside your `try` block. 
+To view the data results, log the `data` variable to the console inside your `try` block.
 
 Below your `fetchData` definition, call the function and open up the console to see the results.
 
@@ -248,9 +248,9 @@ const fetchData = async () => {
   try {
     const res = await fetch(forumLatest);
     const data = await res.json();
-    
+
   } catch (err) {
-    
+
   }
 };
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
index 2a2b231bd59..5199383f511 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
@@ -242,7 +242,7 @@ const fetchData = async () => {
   try {
     const res = await fetch(forumLatest);
     const data = await res.json();
-    
+
   } catch (err) {
     console.log(err);
   }
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c56790fac5409eb5ec6f9.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c56790fac5409eb5ec6f9.md
index f4ccfa4981a..201c65c5d23 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c56790fac5409eb5ec6f9.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c56790fac5409eb5ec6f9.md
@@ -12,7 +12,7 @@ Back in your `showLatestPosts()` function, use destructuring to get the `topic_l
 # --hints--
 
 You should use `const` to destructure `topic_list` and `users` from the `data` object.
-  
+
 ```js
 assert.match(code, /const\s*{\s*(topic_list\s*,\s*users|users\s*,\s*topic_list)\s*}\s*=\s*data/);
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c8d9a73965c0a26d7f634.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c8d9a73965c0a26d7f634.md
index 2935f2a2d75..3ed80741a80 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c8d9a73965c0a26d7f634.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c8d9a73965c0a26d7f634.md
@@ -246,7 +246,7 @@ fetchData();
 --fcc-editable-region--
 const showLatestPosts = (data) => {
   const { topic_list, users } = data;
-  
+
 };
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c90830bbeb40ab15148a6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c90830bbeb40ab15148a6.md
index b8267d10aa9..ae6190bcee1 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c90830bbeb40ab15148a6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c90830bbeb40ab15148a6.md
@@ -267,7 +267,7 @@ fetchData();
 const showLatestPosts = (data) => {
   const { topic_list, users } = data;
   const { topics } = topic_list;
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c95001ff61f0b3c39ce71.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c95001ff61f0b3c39ce71.md
index 463254021f2..95c86b85ad8 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c95001ff61f0b3c39ce71.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c95001ff61f0b3c39ce71.md
@@ -255,7 +255,7 @@ const showLatestPosts = (data) => {
   const { topics } = topic_list;
   --fcc-editable-region--
   postsContainer.innerHTML = topics.map((item) => {
-  
+
   });
   --fcc-editable-region--
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643e99a35a2cde013489176c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643e99a35a2cde013489176c.md
index 37b07bdaad2..afe56498d70 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643e99a35a2cde013489176c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643e99a35a2cde013489176c.md
@@ -9,7 +9,7 @@ dashedName: step-16
 
 The next step is to build out the table which will display the forum data.
 
-Below your destructuring assignment, add a `return` keyword followed by a set of template literals. Inside those template literals, add a table row `tr` element. 
+Below your destructuring assignment, add a `return` keyword followed by a set of template literals. Inside those template literals, add a table row `tr` element.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643e9ee64efc77016fa3397c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643e9ee64efc77016fa3397c.md
index c964009ea82..76a2de3bbef 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643e9ee64efc77016fa3397c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643e9ee64efc77016fa3397c.md
@@ -260,7 +260,7 @@ const showLatestPosts = (data) => {
   --fcc-editable-region--
     return `
       <tr>
-      
+
       </tr>
     `;
   --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643e9f727a93d80198228d57.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643e9f727a93d80198228d57.md
index 0838d15f258..0365c8372fb 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643e9f727a93d80198228d57.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643e9f727a93d80198228d57.md
@@ -9,7 +9,7 @@ dashedName: step-19
 
 To display the topic title, add a `p` element inside the first `td` element.
 
-Between the paragraph tags, add an embedded expression that contains the  `title` variable. Then add a class called `post-title` inside the opening paragraph tag. 
+Between the paragraph tags, add an embedded expression that contains the  `title` variable. Then add a class called `post-title` inside the opening paragraph tag.
 
 # --hints--
 
@@ -276,7 +276,7 @@ const showLatestPosts = (data) => {
     return `
     <tr>
       <td>
-      
+
       </td>
   --fcc-editable-region--
       <td></td>
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643ec3040ee13201ff1c35bf.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643ec3040ee13201ff1c35bf.md
index f083aa30a2b..da1be42a4f9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643ec3040ee13201ff1c35bf.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643ec3040ee13201ff1c35bf.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-Keep the second `td` element empty because you will add content to it later on. 
+Keep the second `td` element empty because you will add content to it later on.
 
 In the third `td` element, add the following embedded expression: `${posts_count - 1}`.
 
@@ -269,7 +269,7 @@ const showLatestPosts = (data) => {
       </td>
       <td></td>
       <td>
-      
+
       </td>
     --fcc-editable-region--
       <td></td>
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643ee71edd2ec2014c0ff0e0.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643ee71edd2ec2014c0ff0e0.md
index 2bc8af34582..8955986aa2f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643ee71edd2ec2014c0ff0e0.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643ee71edd2ec2014c0ff0e0.md
@@ -266,7 +266,7 @@ const showLatestPosts = (data) => {
       <td></td>
       <td>${posts_count - 1}</td>
       <td>
-      
+
       </td>
     --fcc-editable-region--
       <td></td>
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443c98ac169e501eba36d04.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443c98ac169e501eba36d04.md
index fe391f12d13..4eba42c3ae5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443c98ac169e501eba36d04.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443c98ac169e501eba36d04.md
@@ -240,7 +240,7 @@ const timeAgo = (time) => {
   const currentTime = new Date();
   const lastPost = new Date(time);
   const timeDifference = currentTime - lastPost;
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443cc3ed4a11e02329c4c0e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443cc3ed4a11e02329c4c0e.md
index 98d092b14f2..1b60c17ae47 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443cc3ed4a11e02329c4c0e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443cc3ed4a11e02329c4c0e.md
@@ -7,7 +7,7 @@ dashedName: step-27
 
 # --description--
 
-Create a constant named `minutesAgo` and assign it `Math.floor(timeDifference / msPerMinute)` to get the number of minutes ago the post was created. 
+Create a constant named `minutesAgo` and assign it `Math.floor(timeDifference / msPerMinute)` to get the number of minutes ago the post was created.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443ce08c89b250267c4225a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443ce08c89b250267c4225a.md
index d6731927ae9..8521f006d14 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443ce08c89b250267c4225a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443ce08c89b250267c4225a.md
@@ -7,7 +7,7 @@ dashedName: step-28
 
 # --description--
 
-Create a constant named `hoursAgo` that will store the number of hours that have passed since the last post. You can do this by dividing `minutesAgo` by `60`, and then rounding down to the nearest whole number. 
+Create a constant named `hoursAgo` that will store the number of hours that have passed since the last post. You can do this by dividing `minutesAgo` by `60`, and then rounding down to the nearest whole number.
 
 
 # --hints--
@@ -243,7 +243,7 @@ const timeAgo = (time) => {
   const timeDifference = currentTime - lastPost;
   const msPerMinute = 1000 * 60;
   const minutesAgo = Math.floor(timeDifference / msPerMinute);
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443cf1cca1fbb02a8a6e46e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443cf1cca1fbb02a8a6e46e.md
index 9c0106ee502..2ff8d8cd164 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443cf1cca1fbb02a8a6e46e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443cf1cca1fbb02a8a6e46e.md
@@ -7,7 +7,7 @@ dashedName: step-29
 
 # --description--
 
-Create a constant named `daysAgo` that will store the number of days that have passed since the last post. You can do this by dividing `hoursAgo` by `24`, and then rounding down to the nearest whole number. 
+Create a constant named `daysAgo` that will store the number of days that have passed since the last post. You can do this by dividing `hoursAgo` by `24`, and then rounding down to the nearest whole number.
 
 
 # --hints--
@@ -244,7 +244,7 @@ const timeAgo = (time) => {
   const msPerMinute = 1000 * 60;
   const minutesAgo = Math.floor(timeDifference / msPerMinute);
   const hoursAgo = Math.floor(minutesAgo / 60);
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443d0428d7c2402e9d78709.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443d0428d7c2402e9d78709.md
index a76b3c83c95..4296f753381 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443d0428d7c2402e9d78709.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6443d0428d7c2402e9d78709.md
@@ -9,7 +9,7 @@ dashedName: step-30
 
 The next step is to return the number of minutes ago the post was created.
 
-Create an `if` statement that checks if `minutesAgo` is less than `60`. If it is, then `return` the template literal `${minutesAgo}m ago`. 
+Create an `if` statement that checks if `minutesAgo` is less than `60`. If it is, then `return` the template literal `${minutesAgo}m ago`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444062a33ab4c03d0c2e9f5.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444062a33ab4c03d0c2e9f5.md
index feedfbd3fd4..4573bab0352 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444062a33ab4c03d0c2e9f5.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444062a33ab4c03d0c2e9f5.md
@@ -291,7 +291,7 @@ const showLatestPosts = (data) => {
       <td>${posts_count - 1}</td>
       <td>${views}</td>
       <td>
-      
+
       </td>
     </tr>`;
   }).join("");
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ed90ff671201bf007af6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ed90ff671201bf007af6.md
index 04a32d1540c..e357019256c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ed90ff671201bf007af6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ed90ff671201bf007af6.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-Next, create an `if` statement that checks if `views` is greater than or equal to `1000`.  If it is, return the template literal `${thousands}k`. 
+Next, create an `if` statement that checks if `views` is greater than or equal to `1000`.  If it is, return the template literal `${thousands}k`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444f324c287170220eee013.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444f324c287170220eee013.md
index 4ea7f52793f..f3f02429943 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444f324c287170220eee013.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444f324c287170220eee013.md
@@ -12,7 +12,7 @@ Inside the fourth `td` element, update the current value to instead call the `vi
 # --hints--
 
 You should call the `viewCount` function and pass in the `views` variable as an argument.
-  
+
 ```js
 assert(code.match(/<tr>(?:.*<td>.*<\/td>\s*){3}<td>\s*\$\{\s*viewCount\s*\(\s*views\s*\)\s*\}\s*<\/td>.*<\/tr>/s));
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b6d20eabd7e0149383254.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b6d20eabd7e0149383254.md
index cec10962706..adbc786cb82 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b6d20eabd7e0149383254.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b6d20eabd7e0149383254.md
@@ -11,7 +11,7 @@ Inside your `forumCategory` function, create a new `let` variable named `selecte
 
 # --hints--
 
-You should use `let` to declare a variable named `selectedCategory`. 
+You should use `let` to declare a variable named `selectedCategory`.
 
 ```js
 assert.match(code, /\s*let\s+selectedCategory\s*/);
@@ -248,7 +248,7 @@ const allCategories = {
 
 --fcc-editable-region--
 const forumCategory = (id) => {
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b736c83c5250181633899.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b736c83c5250181633899.md
index d8770b474ae..afcf0eb6157 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b736c83c5250181633899.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b736c83c5250181633899.md
@@ -243,7 +243,7 @@ const allCategories = {
 --fcc-editable-region--
 const forumCategory = (id) => {
   let selectedCategory = {};
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
index c6598ea2136..e932986386d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
@@ -245,7 +245,7 @@ const forumCategory = (id) => {
   let selectedCategory = {};
 
   if (allCategories.hasOwnProperty(id)) {
-  
+
   }
 };
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644baae059c58402a31e815a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644baae059c58402a31e815a.md
index d5cfe4972de..782465ffb71 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644baae059c58402a31e815a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644baae059c58402a31e815a.md
@@ -9,7 +9,7 @@ dashedName: step-48
 
 If the `id` is not in the `allCategories` object, you will need to display the `General` category.
 
-Below your `if` statement, add an `else` clause. 
+Below your `if` statement, add an `else` clause.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644f4bcf1c2afd0211cd945e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644f4bcf1c2afd0211cd945e.md
index 3d5c6758f8a..3a7505a7fdb 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644f4bcf1c2afd0211cd945e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644f4bcf1c2afd0211cd945e.md
@@ -25,7 +25,7 @@ You should assign template literals to your `url` variable.
 assert.match(code, /const\s+url\s*=\s*`[\s\S]*`/);
 ```
 
-You should have the value of `${forumCategoryUrl}${selectedCategory.className}/${id}` inside your template literal. 
+You should have the value of `${forumCategoryUrl}${selectedCategory.className}/${id}` inside your template literal.
 
 ```js
 assert.match(code, /const\s+url\s*=\s*`\$\{forumCategoryUrl\}\$\{selectedCategory\.className\}\/\$\{id\}`/);
@@ -268,7 +268,7 @@ const forumCategory = (id) => {
     selectedCategory.id = 1;
   }
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 };
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644fa585a5f9970173ca3cff.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644fa585a5f9970173ca3cff.md
index d8ef784d447..7e7d489f1c9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644fa585a5f9970173ca3cff.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644fa585a5f9970173ca3cff.md
@@ -7,7 +7,7 @@ dashedName: step-52
 
 # --description--
 
-Create a constant called `linkClass` and assign it a template literal. Inside that template literal, add the value of `category ${selectedCategory.className}`. 
+Create a constant called `linkClass` and assign it a template literal. Inside that template literal, add the value of `category ${selectedCategory.className}`.
 
 These class names will be used to apply styles for the anchor element.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644fb1d7f0257702a0c935cf.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644fb1d7f0257702a0c935cf.md
index 3f19267ca0d..91e8976665a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644fb1d7f0257702a0c935cf.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644fb1d7f0257702a0c935cf.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Next, return an anchor element inside template literals. For the `href` attribute, assign the value of the `url` constant. 
+Next, return an anchor element inside template literals. For the `href` attribute, assign the value of the `url` constant.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644fba64caf60303c9540d14.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644fba64caf60303c9540d14.md
index 1de38b6ca4f..1cbda798080 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644fba64caf60303c9540d14.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644fba64caf60303c9540d14.md
@@ -7,9 +7,9 @@ dashedName: step-54
 
 # --description--
 
-After the `href` attribute, set the `class` attribute to the constant named `linkClass`. 
+After the `href` attribute, set the `class` attribute to the constant named `linkClass`.
 
-After the `class` attribute, set the `target` attribute to `_blank`. 
+After the `class` attribute, set the `target` attribute to `_blank`.
 
 Lastly, place the `linkText` constant in between the anchor tags to display the text in the link.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645763874fd6d901c273db29.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645763874fd6d901c273db29.md
index ecccf223642..694e13d5308 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645763874fd6d901c273db29.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645763874fd6d901c273db29.md
@@ -7,9 +7,9 @@ dashedName: step-55
 
 # --description--
 
-Inside, the first `td` element, add an embedded expression `${}`. Inside that expression, call the `forumCategory` function with the argument of `category_id`. 
+Inside, the first `td` element, add an embedded expression `${}`. Inside that expression, call the `forumCategory` function with the argument of `category_id`.
 
-Now, you should see a category displayed underneath each post topic. 
+Now, you should see a category displayed underneath each post topic.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f1cffc7f95e01db009f32.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f1cffc7f95e01db009f32.md
index 03cf6aea3fb..6358f140cc1 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f1cffc7f95e01db009f32.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f1cffc7f95e01db009f32.md
@@ -7,7 +7,7 @@ dashedName: step-57
 
 # --description--
 
-The next step is to loop through the `posters` array to get all of their avatars. 
+The next step is to loop through the `posters` array to get all of their avatars.
 
 Start by adding a `return` keyword followed by `posters.map()`. For the callback function, add a parameter called `poster`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f34e7925b68021ce0bcaa.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f34e7925b68021ce0bcaa.md
index ffb58638531..ca5957b9549 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f34e7925b68021ce0bcaa.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f34e7925b68021ce0bcaa.md
@@ -9,7 +9,7 @@ dashedName: step-58
 
 The next step is to find the correct user in the `users` array.
 
-Start by creating a constant called `user` and assign it `users.find()`. The `find` method should have a callback function with a parameter of `user`. 
+Start by creating a constant called `user` and assign it `users.find()`. The `find` method should have a callback function with a parameter of `user`.
 
 Inside the `find` method, implicitly return `user.id` strictly equal to `poster.user_id`.
 
@@ -319,7 +319,7 @@ const viewCount = (views) => {
 --fcc-editable-region--
 const avatars = (posters, users) => {
   return posters.map((poster) => {
-    
+
   });
 };
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f764c37de33015ded1273.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f764c37de33015ded1273.md
index 97ad9652313..a3b32dea706 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f764c37de33015ded1273.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f764c37de33015ded1273.md
@@ -7,7 +7,7 @@ dashedName: step-60
 
 # --description--
 
-To customize the avatar's size, you can set it to a value of `30`. 
+To customize the avatar's size, you can set it to a value of `30`.
 
 Start by creating a constant called `avatar`. Then assign it the result of using the `replace` method on `user.avatar_template`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f7879ebbdb201892e55e1.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f7879ebbdb201892e55e1.md
index dc3bd2648dd..232b165b2ea 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f7879ebbdb201892e55e1.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f7879ebbdb201892e55e1.md
@@ -9,15 +9,15 @@ dashedName: step-61
 
 Next, you will construct the `userAvatarUrl`.
 
-Start by creating a constant called `userAvatarUrl`. Then use a `ternary` operator to check if `avatar` starts with `/user_avatar/`. 
+Start by creating a constant called `userAvatarUrl`. Then use a `ternary` operator to check if `avatar` starts with `/user_avatar/`.
 
 If so, use the `concat` method to concatenate `avatarUrl` to `avatar`. Otherwise return `avatar`.
 
-This will ensure the avatar URL is correctly formed whether it's a relative or absolute URL. 
+This will ensure the avatar URL is correctly formed whether it's a relative or absolute URL.
 
 # --hints--
 
-You should have a constant named `userAvatarUrl`. 
+You should have a constant named `userAvatarUrl`.
 
 ```js
 assert(code.match(/const\s+userAvatarUrl\s*=/));
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f8615fa144d01c476b22c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f8615fa144d01c476b22c.md
index 9dbd1b8a134..5a8507f37f8 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f8615fa144d01c476b22c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/645f8615fa144d01c476b22c.md
@@ -9,7 +9,7 @@ dashedName: step-62
 
 Lastly, you will need to return the image for the user avatar.
 
-Start by adding a `return` followed by a set of template literals. Inside the template literals, add an `img` element. 
+Start by adding a `return` followed by a set of template literals. Inside the template literals, add an `img` element.
 
 Inside the `img` element, add a `src` attribute with the value of `${userAvatarUrl}`. For the `alt` attribute, add a value of `${user.name}`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/646494e11d0cab03caee204c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/646494e11d0cab03caee204c.md
index 468af4eab27..1233d3c7177 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/646494e11d0cab03caee204c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/646494e11d0cab03caee204c.md
@@ -11,7 +11,7 @@ Your project is almost complete. It is just missing one last piece.
 
 Users should be able to click on any post title and be directed to the actual post on the [freeCodeCamp forum](https://forum.freecodecamp.org/).
 
-Start by changing the existing paragraph element inside the first `td` element to be an anchor element. 
+Start by changing the existing paragraph element inside the first `td` element to be an anchor element.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64649b108df035051cb2ba2d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64649b108df035051cb2ba2d.md
index b1fac8ed37a..1913374177b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64649b108df035051cb2ba2d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64649b108df035051cb2ba2d.md
@@ -7,7 +7,7 @@ dashedName: step-67
 
 # --description--
 
-For the opening `a` tag, set the `target` attribute to `_blank`. Then, set the `href` attribute to `${forumTopicUrl}${slug}/${id}`. 
+For the opening `a` tag, set the `target` attribute to `_blank`. Then, set the `href` attribute to `${forumTopicUrl}${slug}/${id}`.
 
 And with those changes, your freeCodeCamp forum leaderboard project is now complete!
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
index 822ea4661c1..a0ed095c7c8 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
@@ -257,7 +257,7 @@ const postsContainer = document.getElementById("posts-container");
 
 --fcc-editable-region--
 const fetchData = async () => { 
-  
+
 }
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/657386f11fb8265660bfac75.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/657386f11fb8265660bfac75.md
index 3777674f628..e20a32a9cbd 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/657386f11fb8265660bfac75.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/657386f11fb8265660bfac75.md
@@ -9,7 +9,7 @@ dashedName: step-1
 
 In this project, you will build a freeCodeCamp forum leaderboard that displays the latest topics, users, and replies from the [freeCodeCamp forum](https://forum.freecodecamp.org/). The HTML and CSS have been provided for you. Feel free to explore them.
 
-When you are ready, use `const` to declare a `forumLatest` variable and assign it the string `https://forum-proxy.freecodecamp.rocks/latest`. 
+When you are ready, use `const` to declare a `forumLatest` variable and assign it the string `https://forum-proxy.freecodecamp.rocks/latest`.
 
 Below that, create another `const` variable called `forumTopicUrl` and assign it the string `https://forum.freecodecamp.org/t/`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65738cc6cba1825b14806b3d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65738cc6cba1825b14806b3d.md
index f19732236ba..7010b3b65e9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65738cc6cba1825b14806b3d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65738cc6cba1825b14806b3d.md
@@ -7,7 +7,7 @@ dashedName: step-2
 
 # --description--
 
-Next, create a `const` variable called `forumCategoryUrl` and assign it the string `https://forum.freecodecamp.org/c/`. 
+Next, create a `const` variable called `forumCategoryUrl` and assign it the string `https://forum.freecodecamp.org/c/`.
 
 Below that, create another `const` variable called `avatarUrl` and assign it the string `https://sea1.discourse-cdn.com/freecodecamp`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65739e21dbdf776ccfbf2df5.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65739e21dbdf776ccfbf2df5.md
index b389b164a6a..f78f2dd4a6a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65739e21dbdf776ccfbf2df5.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65739e21dbdf776ccfbf2df5.md
@@ -7,7 +7,7 @@ dashedName: step-9
 
 # --description--
 
-If there is an error from the `fetch` call, the `catch` block will handle it. 
+If there is an error from the `fetch` call, the `catch` block will handle it.
 
 Inside the `catch` block, add a `console.log` to log the `err` parameter.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6576076879130f6cf7426e82.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6576076879130f6cf7426e82.md
index 23024a4a858..3704bd5f7e1 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6576076879130f6cf7426e82.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6576076879130f6cf7426e82.md
@@ -7,9 +7,9 @@ dashedName: step-39
 
 # --description--
 
-Each of the forum topics includes a category like Python or JavaScript. In the next few steps, you will build out a category object which holds all of the forum categories and `classNames` for the styling. 
+Each of the forum topics includes a category like Python or JavaScript. In the next few steps, you will build out a category object which holds all of the forum categories and `classNames` for the styling.
 
-Start by creating a new constant called `allCategories` and assign it the value of an empty object. 
+Start by creating a new constant called `allCategories` and assign it the value of an empty object.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65760ce115eb06716baeb361.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65760ce115eb06716baeb361.md
index d3513121513..ca3525431ec 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65760ce115eb06716baeb361.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65760ce115eb06716baeb361.md
@@ -9,7 +9,7 @@ dashedName: step-41
 
 Add a new key for the number `409` with a value of an empty object.
 
-Inside that object, add a property with a key of `category` and a string value of `Project Feedback`. 
+Inside that object, add a property with a key of `category` and a string value of `Project Feedback`.
 
 Below that property, add another key called `className` with a string value of `feedback`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65760de70283687288fe70cf.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65760de70283687288fe70cf.md
index 478f0b7a4c4..abccc24e9ac 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65760de70283687288fe70cf.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/65760de70283687288fe70cf.md
@@ -9,7 +9,7 @@ dashedName: step-42
 
 Add a new key for the number `417` with a value of an empty object.
 
-Inside that object, add a property with a key of `category` and a string value of `freeCodeCamp Support`. 
+Inside that object, add a property with a key of `category` and a string value of `freeCodeCamp Support`.
 
 Below that property, add another key called `className` with a string value of `support`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64113249bab9952fb2ce4469.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64113249bab9952fb2ce4469.md
index 02332044cc2..3a65eabf2f5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64113249bab9952fb2ce4469.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64113249bab9952fb2ce4469.md
@@ -7,7 +7,7 @@ dashedName: step-42
 
 # --description--
 
-If you press the `Sort` button again, you should see that `10` is now in the correct position of the `Output`. 
+If you press the `Sort` button again, you should see that `10` is now in the correct position of the `Output`.
 
 To finish this project, change your `option` back to a `value` and text of `1`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/5d5a813321b9e3db6c106a46.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/5d5a813321b9e3db6c106a46.md
index 4936d4f51cd..529cac73457 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/5d5a813321b9e3db6c106a46.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/5d5a813321b9e3db6c106a46.md
@@ -7,7 +7,7 @@ dashedName: step-1
 
 # --description--
 
-JavaScript is a powerful language which allows you to build websites that are interactive. 
+JavaScript is a powerful language which allows you to build websites that are interactive.
 
 *Note*: For all of the projects in this curriculum, you will need to have a basic level knowledge of HTML and CSS. If you are new to HTML and CSS, please go through the [Responsive Web Design Certification](https://www.freecodecamp.org/learn/2022/responsive-web-design/) first.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a23d1c5f1c93161f3582ae.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a23d1c5f1c93161f3582ae.md
index 014b0b80a84..2b1f6e8990f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a23d1c5f1c93161f3582ae.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a23d1c5f1c93161f3582ae.md
@@ -7,7 +7,7 @@ dashedName: step-23
 
 # --description--
 
-Similar to your `#stats` element, your `#monsterStats` element needs two `span` elements. Give them the class `stat` and give the first element the text `Monster Name: ` and the second the text `Health: `. After the text in each, add a `strong` element with an empty nested `span` element. Give the first inner `span` element an `id` of `monsterName` and the second inner `span` element an `id` of `monsterHealth`.
+Similar to your `#stats` element, your `#monsterStats` element needs two `span` elements. Give them the class `stat` and give the first element the text `Monster Name:` and the second the text `Health:`. After the text in each, add a `strong` element with an empty nested `span` element. Give the first inner `span` element an `id` of `monsterName` and the second inner `span` element an `id` of `monsterHealth`.
 
 # --hints--
 
@@ -46,14 +46,14 @@ assert.exists(strong);
 assert.exists(span);
 ```
 
-Your first `span` element should have the text `Monster Name: `. Make sure the spacing is correct.
+Your first `span` element should have the text `Monster Name:`. Make sure the spacing is correct.
 
 ```js
 const spans = document.querySelectorAll(`#monsterStats > span`);
 assert.match(spans[0].innerHTML, /Monster Name:\s+/);
 ```
 
-Your second `span` element should have the text `Health: `. Make sure the spacing is correct.
+Your second `span` element should have the text `Health:`. Make sure the spacing is correct.
 
 ```js
 const spans = document.querySelectorAll(`#monsterStats > span`);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a240c67f3dbb1a1e6d95ee.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a240c67f3dbb1a1e6d95ee.md
index 81833f16e67..7a08e100094 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a240c67f3dbb1a1e6d95ee.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a240c67f3dbb1a1e6d95ee.md
@@ -7,9 +7,9 @@ dashedName: step-27
 
 # --description--
 
-Give your `#game` a maximum width of `500px` and a maximum height of `400px`. Set the `background-color` to `#ffffff` and the `color` to `#ffffff`. 
+Give your `#game` a maximum width of `500px` and a maximum height of `400px`. Set the `background-color` to `#ffffff` and the `color` to `#ffffff`.
 
-Use margins to center it by setting the top margin to `30px`, bottom margin to `0px`, and the left and right margin to `auto`. 
+Use margins to center it by setting the top margin to `30px`, bottom margin to `0px`, and the left and right margin to `auto`.
 
 Finally, give it `10px` of padding on all four sides.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
index e356c2b6212..efd2b07c619 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
@@ -7,7 +7,7 @@ dashedName: step-3
 
 # --description--
 
-One of the most powerful tools is your developer console. Depending on your browser, this might be opened by pressing `F12` or `Ctrl+Shift+I`. On Mac, you can press `Option + ⌘ + C` and select "Console". You can also click the "Console" button above the preview window to see our built-in console. 
+One of the most powerful tools is your developer console. Depending on your browser, this might be opened by pressing `F12` or `Ctrl+Shift+I`. On Mac, you can press `Option + ⌘ + C` and select "Console". You can also click the "Console" button above the preview window to see our built-in console.
 
 The developer console will include errors that are produced by your code, but you can also use it to see values of variables in your code, which is helpful for debugging.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a257659d0d1e2456f24ba2.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a257659d0d1e2456f24ba2.md
index 1e6222445d5..06ba65c96c7 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a257659d0d1e2456f24ba2.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a257659d0d1e2456f24ba2.md
@@ -7,7 +7,7 @@ dashedName: step-4
 
 # --description--
 
-Before you start writing your project code, you should move it to its own file to keep things organized. 
+Before you start writing your project code, you should move it to its own file to keep things organized.
 
 Remove your `console.log("Hello World");` line. Then give your now empty `script` element a `src` attribute set to `./script.js`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
index a50acad5372..7ddfe20a7f7 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
@@ -144,7 +144,7 @@ const monsterHealthText = document.querySelector("#monsterHealth");
 --fcc-editable-region--
 const locations = [
   {
-    
+
   }
 ];
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ab0e27cbaf0b54ba8a42.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ab0e27cbaf0b54ba8a42.md
index c0b596b104d..e5dbbde538c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ab0e27cbaf0b54ba8a42.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ab0e27cbaf0b54ba8a42.md
@@ -7,9 +7,9 @@ dashedName: step-54
 
 # --description--
 
-Just like array values, object properties are separated by a comma. Add a comma after your `name` property and add a `button text` property with the value of an empty array. 
+Just like array values, object properties are separated by a comma. Add a comma after your `name` property and add a `button text` property with the value of an empty array.
 
-Note that, because the property name has more than one word, you'll need to surround it in quotes. For example:
+Note that, because the property name has more than one word, you'll need to surround it in quotes. 예시:
 
 ```js
 {
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
index a065e85c06c..81ebba26eab 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
@@ -215,7 +215,7 @@ function buyWeapon() {
     gold -= 30;
     currentWeapon++;
     goldText.innerText = gold;
-    
+
     text.innerText = "You now have a new weapon.";
   }
 }
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
index 29a5d4dd4d0..4f2ed89e0ac 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
@@ -223,7 +223,7 @@ function buyWeapon() {
     goldText.innerText = gold;
     let newWeapon = weapons[currentWeapon].name;
     text.innerText = "You now have a " + newWeapon + ".";
-    
+
   }
 }
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
index 32554d99a4a..fddaa343d3b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
@@ -214,7 +214,7 @@ function buyWeapon() {
     let newWeapon = weapons[currentWeapon].name;
     text.innerText = "You now have a " + newWeapon + ".";
     inventory.push(newWeapon);
-    
+
   }
 }
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
index 9d2a0b66bdf..c9a8d067c6f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
@@ -9,9 +9,9 @@ dashedName: step-102
 
 The next step is to create a variable called `currentWeapon`.
 
-Notice that you already have a `currentWeapon` variable elsewhere in your code. Since this new `currentWeapon` variable will be inside an `if` statement, it will be scoped only to that block of code. 
+Notice that you already have a `currentWeapon` variable elsewhere in your code. Since this new `currentWeapon` variable will be inside an `if` statement, it will be scoped only to that block of code.
 
-Scope is the term used to describe where a variable can be accessed. If a variable is declared inside a block of code, it is only accessible to the code inside that block. This is called block scope. 
+Scope is the term used to describe where a variable can be accessed. If a variable is declared inside a block of code, it is only accessible to the code inside that block. This is called block scope.
 
 ```js
 let num = 1;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
index 8f1fd41ca30..95754b15eba 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
@@ -18,7 +18,7 @@ const paragraph = document.querySelector('p');
 paragraph.style.display = 'block';
 ```
 
-Display the `monsterStats` element by updating the `display` property of the `style` property to `block`. 
+Display the `monsterStats` element by updating the `display` property of the `style` property to `block`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
index 7d0565007c4..c715960538e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
@@ -17,19 +17,19 @@ You should use dot notation to access the `innerText` property of `text`.
 assert.match(attack.toString(), /text\.innerText/);
 ```
 
-You should assign the string `The ` to `innerText` property of `text`.
+You should assign the string `The` to `innerText` property of `text`.
 
 ```js
 assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1/);
 ```
 
-You should use the concatenation operator to add the value of `monsters[fighting].name` to the `The ` string.
+You should use the concatenation operator to add the value of `monsters[fighting].name` to the `The` string.
 
 ```js
 assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
-You should use the concatenation operator to add the string ` attacks.` to the `monsters[fighting].name` string.
+You should use the concatenation operator to add the string `attacks.` to the `monsters[fighting].name` string.
 
 ```js
 assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name\s*\+\s*('|") attacks\.\2/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
index 08c90cdd300..e062f34ae25 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
@@ -7,7 +7,7 @@ dashedName: step-118
 
 # --description--
 
-On a new line, use the addition assignment operator(`+=`), to add the string `" You attack it with your <weapon>."` to the `text` value, replacing `<weapon>` with the player's current weapon. Additionally, remember that this line of text starts with a space so it will properly display. 
+On a new line, use the addition assignment operator(`+=`), to add the string `" You attack it with your <weapon>."` to the `text` value, replacing `<weapon>` with the player's current weapon. Additionally, remember that this line of text starts with a space so it will properly display.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
index 88759b5f502..ac76865ed0a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
@@ -7,7 +7,7 @@ dashedName: step-120
 
 # --description--
 
-Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon. 
+Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon.
 
 Remember that you can access the power of the player's current weapon using `weapons[currentWeapon].power`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
index 08b171842f0..4931f15d514 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
@@ -288,7 +288,7 @@ function attack() {
   text.innerText += " You attack it with your " + weapons[currentWeapon].name + ".";
   health -= monsters[fighting].level;
   monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1;
-  
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
index fa7c7023e84..60667347322 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
@@ -284,7 +284,7 @@ function attack() {
   monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1;
   healthText.innerText = health;
   monsterHealthText.innerText = monsterHealth;
-  
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
index 29d3af7b12f..e32d3bd0439 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
@@ -7,7 +7,7 @@ dashedName: step-127
 
 # --description--
 
-In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. You can get the monster's level with the `level` property.
+In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. Remember you can get the monster's level by using `monsters[fighting].level`.
 
 Here is an example of setting `num` to `num` plus `5` * `8`: `num += 5 * 8`. Use `Math.floor()` to round the result down.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
index a873a1c4396..d573e966cac 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
@@ -292,7 +292,7 @@ function dodge() {
 function defeatMonster() {
   gold += Math.floor(monsters[fighting].level * 6.7);
   xp += monsters[fighting].level;
-  
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
index 72aeb24fc20..4a948c96439 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
@@ -294,7 +294,7 @@ function defeatMonster() {
   xp += monsters[fighting].level;
   goldText.innerText = gold;
   xpText.innerText = xp;
-  
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
index 81f7c3ea96d..8ac903940a1 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
@@ -289,7 +289,7 @@ function attack() {
   text.innerText += " You attack it with your " + weapons[currentWeapon].name + ".";
   health -= getMonsterAttackValue(monsters[fighting].level);
   if (isMonsterHit()) {
-    
+
   }
   monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1;
   healthText.innerText = health;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
index 4ddf3492b14..690b9c4efd5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
@@ -388,7 +388,7 @@ function pickEight() {
 --fcc-editable-region--
 function pick(guess) {
   const numbers = [];
-  
+
 }
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
index cec99343cc2..4cfce9c5908 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
@@ -382,7 +382,7 @@ function pick(guess) {
     numbers.push(Math.floor(Math.random() * 11));
   }
   text.innerText = "You picked " + guess + ". Here are the random numbers:\n";
-  
+
 }
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
index 552ff72ab24..f3d11a95837 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
@@ -7,7 +7,7 @@ dashedName: step-136
 
 # --description--
 
-In the `locations` array, add another object at the end. Set the `name` property to `"lose"`, set `"button text"` to an array with three `"REPLAY?"` strings, set `"button functions"` to an array with three `restart` variables, and set `text` to `"You die. &#x2620;"`. 
+In the `locations` array, add another object at the end. Set the `name` property to `"lose"`, set `"button text"` to an array with three `"REPLAY?"` strings, set `"button functions"` to an array with three `restart` variables, and set `text` to `"You die. &#x2620;"`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
index 02605e8ca4c..432c7be3420 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
@@ -7,10 +7,10 @@ dashedName: step-138
 
 # --description--
 
-In order for the `&#x2620;` emoticon text to properly display on the page, you will need to use the <dfn>innerHTML</dfn> property. 
+In order for the `&#x2620;` emoticon text to properly display on the page, you will need to use the <dfn>innerHTML</dfn> property.
+
+The `innerHTML` property allows you to access or modify the content inside an HTML element using JavaScript.
 
-The `innerHTML` property allows you to access or modify the content inside an HTML element using JavaScript. 
- 
 Here is an example of updating the content for this paragraph element using the `innerHTML`  property.
 
 ```html
@@ -20,8 +20,8 @@ Here is an example of updating the content for this paragraph element using the
 ```js
 document.querySelector("#demo").innerHTML = "Hello, innerHTML!";
 ```
- 
-In the `update` function, change `text.innerText` to `text.innerHTML`. 
+
+In the `update` function, change `text.innerText` to `text.innerHTML`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63ee5d8f9e7168076e932fe2.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63ee5d8f9e7168076e932fe2.md
index 093f8f38c57..96485328760 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63ee5d8f9e7168076e932fe2.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63ee5d8f9e7168076e932fe2.md
@@ -7,7 +7,7 @@ dashedName: step-12
 
 # --description--
 
-After your `h2` element, create two `p` elements. Give the first a `class` of `dessert-price`, and the text of the `price` variable with a dollar sign in front of it. Give the second a `class` of `product-category`, and the text `Category: ` followed by the value of the `category` variable.
+After your `h2` element, create two `p` elements. Give the first a `class` of `dessert-price`, and the text of the `price` variable with a dollar sign in front of it. Give the second a `class` of `product-category`, and the text `Category:` followed by the value of the `category` variable.
 
 # --hints--
 
@@ -44,7 +44,7 @@ Your second `p` element should have a `class` of `product-category`.
 assert.equal(document.querySelector('.dessert-card')?.children[2].className, 'product-category');
 ```
 
-Your second `p` element should have the text `Category: ` followed by the value of the `category` variable.
+Your second `p` element should have the text `Category:` followed by the value of the `category` variable.
 
 ```js
 assert.equal(document.querySelector('.dessert-card')?.children[2].textContent, 'Category: Cupcake');
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
index aa1a0ddb307..a059d4b184e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
@@ -315,7 +315,7 @@ class ShoppingCart {
 
     const totalCountPerProduct = {};
     this.items.forEach((dessert) => {
-      
+
     })
   }
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
index 71c0e34e35d..071bb7a42d8 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
@@ -310,7 +310,7 @@ class ShoppingCart {
       totalCountPerProduct[dessert.id] = (totalCountPerProduct[dessert.id] || 0) + 1;
     })
 
-    
+
   }
 --fcc-editable-region--
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f017b4ad028a148eb713c0.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f017b4ad028a148eb713c0.md
index f58a496de51..b6f14c6ae69 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f017b4ad028a148eb713c0.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f017b4ad028a148eb713c0.md
@@ -7,7 +7,7 @@ dashedName: step-29
 
 # --description--
 
-For your falsy expression, you'll need to add new HTML to your `productsContainer`. Start by removing the `undefined`, then use the addition assignment operator and template literal syntax to add a `div` with the `class` set to `product` and the `id` set to `dessert${id}` to the `innerHTML` property of the `productsContainer`. 
+For your falsy expression, you'll need to add new HTML to your `productsContainer`. Start by removing the `undefined`, then use the addition assignment operator and template literal syntax to add a `div` with the `class` set to `product` and the `id` set to `dessert${id}` to the `innerHTML` property of the `productsContainer`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0289df84a581bbdbd29b7.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0289df84a581bbdbd29b7.md
index ecb4fe325ed..c27e13717f0 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0289df84a581bbdbd29b7.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0289df84a581bbdbd29b7.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-In your event listener callback, call the `.addItem()` method of your `cart` object, and pass in the `event.target.id`. Remember that the `id` here will be a string, so you need to convert it to a number. 
+In your event listener callback, call the `.addItem()` method of your `cart` object, and pass in the `event.target.id`. Remember that the `id` here will be a string, so you need to convert it to a number.
 
 Pass your `products` array as the second argument.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0374d5351223a747c301d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0374d5351223a747c301d.md
index ef2b7d52e8d..37c08222320 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0374d5351223a747c301d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0374d5351223a747c301d.md
@@ -369,7 +369,7 @@ class ShoppingCart {
     const tax = this.calculateTaxes(subTotal);
     this.total = subTotal + tax;
     cartSubTotal.textContent = `$${subTotal.toFixed(2)}`;
-    
+
   }
 --fcc-editable-region--
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653283d07b8f9d294aafa83b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653283d07b8f9d294aafa83b.md
index beef7c8f403..84b7b258b1a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653283d07b8f9d294aafa83b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653283d07b8f9d294aafa83b.md
@@ -9,7 +9,7 @@ dashedName: step-26
 
 It's time to begin implementing the functionality for playing the displayed songs.
 
-Define a `playSong` function using `const`. The function should take an `id` parameter which will represent the unique identifier of the song you want to play. 
+Define a `playSong` function using `const`. The function should take an `id` parameter which will represent the unique identifier of the song you want to play.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
index bd28f3f61b7..d99cde2a89f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
@@ -7,7 +7,7 @@ dashedName: step-29
 
 # --description--
 
-Before playing the song, you need to make sure it starts from the beginning. This can be achieved by the use of the `currentTime` property of the `audio` object. 
+Before playing the song, you need to make sure it starts from the beginning. This can be achieved by the use of the `currentTime` property of the `audio` object.
 
 Add an `if` statement to check whether the `userData?.currentSong` is `null` or if `userData?.currentSong.id` is strictly not equal `song.id`. Inside `if` block, set the `currentTime` property of the `audio` object to `0`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
index ab68acec26b..282f93f8d2a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
@@ -7,9 +7,9 @@ dashedName: step-33
 
 # --description--
 
-You need to hook up the `playSong` function to a `click` event listener so the songs will start playing when the play button is clicked.
+In previous steps you built out the functionality for playing a song. Now you need to add the functionality to the play button so that it will play the current song when it is clicked on.
 
-Add a click event listener to the `playButton` element, then use arrow syntax to pass in a callback with an empty pair of curly braces.
+Use the `addEventListener()` method and pass in a `click` event for the first argument and an empty callback function with arrow syntax for the second argument, e.g., `() => {}`.
 
 # --hints--
 
@@ -671,7 +671,7 @@ userData?.songs.sort((a,b) => {
 
   return 0;
 });
-  
+
 renderSongs(userData?.songs);
 
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
index 159fe8d94de..39379b60d48 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
@@ -631,7 +631,7 @@ const renderSongs = (array) => {
       --fcc-editable-region--
 
       --fcc-editable-region--
-      
+
       </li>
       `;
     })
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
index 54762bc9116..cc0469dc00d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
@@ -9,7 +9,7 @@ dashedName: step-18
 
 Use the `join()` method to combine the `songsHTML` markup into a single string.
 
-The `join()` method is used to concatenate all the elements of an array into a single string. It takes an optional parameter called `separator` which is used to separate each element of the array. For example:
+The `join()` method is used to concatenate all the elements of an array into a single string. It takes an optional parameter called `separator` which is used to separate each element of the array. 예시:
 
 ```js
 const exampleArr = ["This", "is", "a", "sentence"];
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
index b206429ea20..9807e77b342 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
@@ -9,7 +9,7 @@ dashedName: step-20
 
 Now you need to call the `renderSongs` function and pass in `userData?.songs` in order to finally display the songs in the UI.
 
-Optional chaining (`?.`) helps prevent errors when accessing nested properties that might be null or undefined. For example:
+Optional chaining (`?.`) helps prevent errors when accessing nested properties that might be null or undefined. 예시:
 
 ```js
 const user = {
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
index 043e3b367db..71c13a9a51c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
@@ -7,7 +7,7 @@ dashedName: step-35
 
 # --description--
 
-Add an `else` block. Inside the `else` block, call the `playSong` function with the `id` of the currently playing song as an argument. 
+Add an `else` block. Inside the `else` block, call the `playSong` function with the `id` of the currently playing song as an argument.
 
 This ensures that the currently playing song will continue to play when the play button is clicked.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
index ba578dc4778..520b11e59e3 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
@@ -636,7 +636,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
index 41c5b522499..8ea1becc84f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
@@ -642,7 +642,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
index f63e4492de1..2a4d2cc76d6 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
@@ -7,7 +7,7 @@ dashedName: step-44
 
 # --description--
 
-Inside the `playNextSong` function, create an `if` statement to check if the `currentSong` of `userData` is strictly equal to `null`. This will check if there's no current song playing in the `userData` object. 
+Inside the `playNextSong` function, create an `if` statement to check if the `currentSong` of `userData` is strictly equal to `null`. This will check if there's no current song playing in the `userData` object.
 
 If the condition is true, call the `playSong` function with the `id` of the first song in the `userData?.songs` array as an argument.
 
@@ -640,7 +640,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
index 2e42f0eb604..b4c01979d31 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
@@ -636,7 +636,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -688,7 +688,7 @@ playButton.addEventListener("click", () => {
 pauseButton.addEventListener("click",  pauseSong);
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 
 userData?.songs.sort((a,b) => {
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
index 6ccb0c196ee..8103c239ca7 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
@@ -640,7 +640,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -658,7 +658,7 @@ const playNextSong = () => {
 };
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 
 const renderSongs = (array) => {
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
index 4bdef2b2946..8e5fb945e95 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
@@ -650,7 +650,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -669,7 +669,7 @@ const playNextSong = () => {
 
 --fcc-editable-region--
 const playPreviousSong = () => {
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
index 692c1ad4fdc..856bd518df4 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
@@ -634,7 +634,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
index 5335a97fccf..8c40d56015c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
@@ -648,7 +648,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
index eefe08306fd..b530d08bef4 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
@@ -7,7 +7,7 @@ dashedName: step-41
 
 # --description--
 
-Before you start working on playing the next and previous song, you need to get the index of each song in the `songs` property of `userData`. 
+Before you start working on playing the next and previous song, you need to get the index of each song in the `songs` property of `userData`.
 
 Start by creating an arrow function called `getCurrentSongIndex`.
 
@@ -630,7 +630,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
index 1e145332f38..44798430f96 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
@@ -636,7 +636,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -665,8 +665,8 @@ const playPreviousSong = () => {
 --fcc-editable-region--
 const highlightCurrentSong = () => {
   const playlistSongElements = document.querySelectorAll(".playlist-song");
-  
-  
+
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
index 48d1a61c199..0db01040b5a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
@@ -7,7 +7,7 @@ dashedName: step-54
 
 # --description--
 
-Loop through the `playlistSongElements` with a `forEach` method. 
+Loop through the `playlistSongElements` with a `forEach` method.
 
 The `forEach` method is used to loop through an array and perform a function on each element of the array. For example, suppose you have an array of numbers and you want to log each number to the console.
 
@@ -647,7 +647,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -678,7 +678,7 @@ const highlightCurrentSong = () => {
   const songToHighlight = document.getElementById(
     `song-${userData?.currentSong?.id}`
   );
-  
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
index a3f47fd207b..c098a978ed6 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
@@ -636,7 +636,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -671,7 +671,7 @@ const highlightCurrentSong = () => {
   playlistSongElements.forEach((songEl) => {
     songEl.removeAttribute("aria-current");
   });
-  
+
 --fcc-editable-region--
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
index 035d4868344..3d73822b244 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
@@ -620,14 +620,14 @@ const playSong = (id) => {
   playButton.classList.add("playing");
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
   audio.play();
 };
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
index 5ee01b136bf..f9531b43d55 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
@@ -641,7 +641,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
index 5270c8cef66..f2d6a26b0c5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
@@ -649,7 +649,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -677,7 +677,7 @@ const playPreviousSong = () => {
 
 --fcc-editable-region--
 const setPlayerDisplay = () => {
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
index 21dc05fc2ce..58a33650707 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
@@ -641,7 +641,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -671,7 +671,7 @@ const setPlayerDisplay = () => {
   const playingSong = document.getElementById("player-song-title");
   const songArtist = document.getElementById("player-song-artist");
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 };
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
index 49524da6d16..f0f8aa56437 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
@@ -654,7 +654,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -686,7 +686,7 @@ const setPlayerDisplay = () => {
   const currentTitle = userData?.currentSong?.title;
   const currentArtist = userData?.currentSong?.artist;
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 };
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
index 8571c5b9145..9ff636575ad 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
@@ -621,14 +621,14 @@ const playSong = (id) => {
 
   highlightCurrentSong();
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
   audio.play();
 };
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
index eada075cb7b..d31a44cda47 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
@@ -7,7 +7,7 @@ dashedName: step-63
 
 # --description--
 
-Use `const` and arrow syntax to define a function called `setPlayButtonAccessibleText`. 
+Use `const` and arrow syntax to define a function called `setPlayButtonAccessibleText`.
 
 This function will set the `aria-label` attribute to the current song, or to the first song in the playlist. And if the playlist is empty, it sets the `aria-label` to `"Play"`.
 
@@ -644,7 +644,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
index 722996b713f..c4d58db6824 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
@@ -638,7 +638,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -711,7 +711,7 @@ const renderSongs = (array) => {
 
 --fcc-editable-region--
 const setPlayButtonAccessibleText = () => {
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
index 6423d26816d..00d4f9f428b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
@@ -644,7 +644,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -718,7 +718,7 @@ const renderSongs = (array) => {
 --fcc-editable-region--
 const setPlayButtonAccessibleText = () => {
   const song = userData?.currentSong || userData?.songs[0];
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
index 159bdf2733a..7aae6969fb9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
@@ -627,7 +627,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
index 9b66e51792d..7de31168f81 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
@@ -645,7 +645,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -672,7 +672,7 @@ const playPreviousSong = () =>{
 };
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 
 const setPlayerDisplay = () => {
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
index 7d9b2301cb6..32bc6f2d77c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
@@ -7,7 +7,7 @@ dashedName: step-68
 
 # --description--
 
-In earlier steps, you learned how to work with the `sort()` method to sort the songs in alphabetical order. Another use case for the callback function is to randomize an array. 
+In earlier steps, you learned how to work with the `sort()` method to sort the songs in alphabetical order. Another use case for the callback function is to randomize an array.
 
 One way to randomize an array of items would be to subtract `0.5` from `Math.random()` which produces random values that are either positive or negative. This makes the comparison result a mix of positive and negative values, leading to a random ordering of elements.
 
@@ -653,7 +653,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -681,7 +681,7 @@ const playPreviousSong = () => {
 
 --fcc-editable-region--
 const shuffle = () => {
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
index 05260f40ef0..d1e2e986196 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
@@ -635,7 +635,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -664,7 +664,7 @@ const playPreviousSong = () =>{
 const shuffle = () => {
   userData?.songs.sort(() => Math.random() - 0.5);
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 };
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
index 51704b05e97..3377b4ce1ed 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
@@ -651,7 +651,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -683,7 +683,7 @@ const shuffle = () => {
   userData.currentSong = null;
   userData.songCurrentTime = 0;
 
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
index c8b49fc4578..6d31a365928 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
@@ -639,7 +639,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
index dc1d3431caf..27a02445e4f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
@@ -651,7 +651,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
index 3c8242d1a3b..38509a2c78f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
@@ -662,7 +662,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -701,7 +701,7 @@ const shuffle = () => {
 
 --fcc-editable-region--
 const deleteSong = (id) => {
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
index 43a6fdc088d..f2d66cfbae3 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
@@ -7,9 +7,9 @@ dashedName: step-75
 
 # --description--
 
-Before deleting a song, you need to check if the song is currently playing. If it is, you need to pause the song and play the next song in the playlist. 
+Before deleting a song, you need to check if the song is currently playing. If it is, you need to pause the song and play the next song in the playlist.
 
-Use an `if` statement to check if the `userData?.currentSong?.id` is equal to the `id` of the song you want to delete. 
+Use an `if` statement to check if the `userData?.currentSong?.id` is equal to the `id` of the song you want to delete.
 
 # --hints--
 
@@ -627,7 +627,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -666,7 +666,7 @@ const shuffle = () => {
 
 const deleteSong = (id) => {
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 
   userData.songs = userData?.songs.filter((song) => song.id !== id);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
index fd7d7e14248..71ab2c0ddae 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
@@ -7,7 +7,7 @@ dashedName: step-76
 
 # --description--
 
-If there is a match then set `userData.currentSong` to `null` and `userData.songCurrentTime` to `0`. 
+If there is a match then set `userData.currentSong` to `null` and `userData.songCurrentTime` to `0`.
 
 After that, call the `pauseSong()` function to stop the playback and the `setPlayerDisplay()` function to update the player display.
 
@@ -651,7 +651,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -691,7 +691,7 @@ const shuffle = () => {
 const deleteSong = (id) => {
 --fcc-editable-region--
   if (userData?.currentSong?.id === id) {
-  
+
   }
 --fcc-editable-region--
   userData.songs = userData?.songs.filter((song) => song.id !== id);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
index 33a549f650f..0caa711bf0d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
@@ -627,7 +627,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -679,7 +679,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
index 3528e1a5cfd..d693d2206d0 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
@@ -656,7 +656,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -709,7 +709,7 @@ const deleteSong = (id) => {
 
 --fcc-editable-region--
   if (userData?.songs.length === 0) {
-  
+
   }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
index 733344f8368..158a28d8ebe 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
@@ -641,7 +641,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -696,7 +696,7 @@ const deleteSong = (id) => {
   if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
-  
+
 
   }
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
index da381ca2774..2b80cd4ec37 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
@@ -655,7 +655,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -713,7 +713,7 @@ const deleteSong = (id) => {
     resetButton.id = "reset";
     resetButton.ariaLabel = "Reset playlist";
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
   }
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
index ccedcd8b98b..ea713e1c7ab 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
@@ -639,7 +639,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -700,7 +700,7 @@ const deleteSong = (id) => {
     playlistSongs.appendChild(resetButton);
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
   }
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
index fa0d6dbf302..e6638f756ca 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
@@ -633,7 +633,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -695,7 +695,7 @@ const deleteSong = (id) => {
 
 --fcc-editable-region--
     resetButton.addEventListener("click", () => {
-  
+
     });
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
index 3034c4f3b3e..0d40749a0c6 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
@@ -651,7 +651,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
index 4dcd3085f91..429ede76710 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
@@ -7,7 +7,7 @@ dashedName: step-86
 
 # --description--
 
-All the core functionalities are now in place. The only issue now is that the next song does not automatically play when the currently playing song ends. 
+All the core functionalities are now in place. The only issue now is that the next song does not automatically play when the currently playing song ends.
 
 To fix that, you can set up an event listener which will detect when the currently playing song ends. The `ended` event listener is appropriate for this. It is fired when the playback of a media reaches the end.
 
@@ -642,7 +642,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
index d6c18104509..3a250374257 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
@@ -625,7 +625,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
index 233cca55f6c..9fc3fc7b67d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
@@ -611,7 +611,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -757,7 +757,7 @@ shuffleButton.addEventListener("click", shuffle);
 
 --fcc-editable-region--
 audio.addEventListener("ended", () => {
-  
+
 });
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
index 17d1a9225d2..c9d3321bde4 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
@@ -596,7 +596,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
index beed0657977..f06ac40b00d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
@@ -608,7 +608,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
index 7403f033d6e..26c627f80b5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
@@ -649,7 +649,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -1431,7 +1431,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
index b1cda372e33..34ed9b1be77 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
@@ -7,7 +7,7 @@ dashedName: step-30
 
 # --description--
 
-Add an `else` block to handle the current song's position in the playlist. 
+Add an `else` block to handle the current song's position in the playlist.
 
 Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData?.songCurrentTime`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
index d83c026af14..086b496210f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
@@ -630,7 +630,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
index 90fd8b65268..8b75180912b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
@@ -651,7 +651,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
@@ -705,8 +705,8 @@ const deleteSong = (id) => {
 --fcc-editable-region--
   if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
-  
-  
+
+
   }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
index a1f80732d3a..739a17e8afa 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
@@ -635,7 +635,7 @@ const playSong = (id) => {
 
 const pauseSong = () => {
   userData.songCurrentTime = audio.currentTime;
-  
+
   playButton.classList.remove("playing");
   audio.pause();
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
index e30a43843be..ab47938172e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
@@ -16,7 +16,7 @@ const names = ["Tom", "Jessica", "Quincy", "Naomi"];
 names.sort() // ["Jessica", "Naomi", "Quincy", "Tom"]
 ```
 
-Add the `sort()` method to `userData?.songs`. 
+Add the `sort()` method to `userData?.songs`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a6098a3405f206312e28f5.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a6098a3405f206312e28f5.md
index c27642fe968..f6de31689f8 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a6098a3405f206312e28f5.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a6098a3405f206312e28f5.md
@@ -9,7 +9,7 @@ dashedName: step-22
 
 To sort the songs in alphabetical order by title, you will need to pass in a compare callback function into your `sort()` method.
 
-Here is an example of sorting a list of fruits by name. 
+Here is an example of sorting a list of fruits by name.
 
 ```js
 const fruits = [
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a609f6e23f3b06c608fb57.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a609f6e23f3b06c608fb57.md
index 80fa8a91f63..df472860fa2 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a609f6e23f3b06c608fb57.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a609f6e23f3b06c608fb57.md
@@ -7,13 +7,13 @@ dashedName: step-23
 
 # --description--
 
-The `sort()` method accepts a compare callback function that defines the sort order. 
+The `sort()` method accepts a compare callback function that defines the sort order.
 
 In this example, the first condition `(a.name < b.name)` checks if the name of the first fruit is less than the name of the second fruit. If so, the first fruit is sorted before the second fruit.
 
 Strings are compared lexicographically which means they are compared character by character. For example, `"Apples"` is less than `"Bananas"` because `"A"` comes before `"B"` in the alphabet.
 
-The reason why this example is returning numbers is because the `sort()` method is expecting a number to be returned. If you return a negative number, the first item is sorted before the second item. 
+The reason why this example is returning numbers is because the `sort()` method is expecting a number to be returned. If you return a negative number, the first item is sorted before the second item.
 
 ```js
 const fruits = [
@@ -35,7 +35,7 @@ fruits.sort((a, b) => {
 });
 ```
 
-Inside your callback function, add an `if` statement to check if `a.title` is less than `b.title`. If so, return `-1`. 
+Inside your callback function, add an `if` statement to check if `a.title` is less than `b.title`. If so, return `-1`.
 
 # --hints--
 
@@ -49,7 +49,7 @@ Your `if` statement should check if `a.title` is less than `b.title`.
 
 ```js
 assert.match(code, /if\s*\(\s*a\.title\s*<\s*b\.title\s*\)/);
-``` 
+```
 
 Your `if` statement should return `-1` if `a.title` is less than `b.title`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a60aa3efd8fa079c2d1537.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a60aa3efd8fa079c2d1537.md
index 9e2709b718d..6fc8539e847 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a60aa3efd8fa079c2d1537.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a60aa3efd8fa079c2d1537.md
@@ -29,7 +29,7 @@ fruits.sort((a, b) => {
 });
 ```
 
-Inside your callback function, add another `if` statement to check if `a.title` is greater than `b.title`. If so, return the number `1`. 
+Inside your callback function, add another `if` statement to check if `a.title` is greater than `b.title`. If so, return the number `1`.
 
 # --hints--
 
@@ -43,7 +43,7 @@ Your `if` statement should check if `a.title` is greater than `b.title`.
 
 ```js
 assert.match(code, /if\s*\(\s*a\.title\s*>\s*b\.title\s*\)/);
-``` 
+```
 
 Your `if` statement should return the number `1` if `a.title` is greater than `b.title`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
index 98f935b82ee..547d0c9bd6a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
@@ -9,7 +9,7 @@ dashedName: step-4
 
 The data you get from a `GET` request is not usable at first. To make the data usable, you can use the `.json()` method on the `Response` object to parse it into JSON. If you expand the `Prototype` of the `Response` object in the console, you will see the `.json()` method there.
 
-Remove `console.log(res)` and implicitly return `res.json()` instead. 
+Remove `console.log(res)` and implicitly return `res.json()` instead.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
index 2f646e78f71..f94c50a366d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
@@ -9,7 +9,7 @@ dashedName: step-6
 
 The `.catch()` method is another asynchronous JavaScript method you can use to handle errors. This is useful in case the `Promise` gets rejected.
 
-Chain `.catch()` to the last `.then()`. Pass in a callback function with `err` as the parameter. Inside the callback, use `console.error()` to log possible errors to the console with the text `There was an error: ${err}`. Since you're using `err` in the text, don't forget to use a template literal string with backticks (\`\`) instead of single or double quotes.
+Chain `.catch()` to the last `.then()`. Pass in a callback function with `err` as the parameter. Inside the callback, use `console.error()` to log possible errors to the console with the text `There was an error: ${err}`. Since you're using `err` in the text, don't forget to use a template literal string with backticks (``) instead of single or double quotes.
 
 **Note**: Now you can terminate your code with a semicolon. You couldn't do that in the previous steps because you'll signal to JavaScript to stop parsing your code, which will affect the `fetch()` syntax.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
index 7ffc7efc825..aa02d21d41c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
@@ -7,7 +7,7 @@ dashedName: step-10
 
 # --description--
 
-Pass an empty callback function to the `.forEach()` method. For the first parameter of the callback, destructure the `author`, `image`, `url`, and `bio` items. 
+Pass an empty callback function to the `.forEach()` method. For the first parameter of the callback, destructure the `author`, `image`, `url`, and `bio` items.
 
 For the second parameter, pass in `index`. This will represent the position of each author, and will be useful for pagination later.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da6dcb6e4c9463d54c75b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da6dcb6e4c9463d54c75b.md
index 7cc960f030e..0764afeb790 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da6dcb6e4c9463d54c75b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da6dcb6e4c9463d54c75b.md
@@ -10,7 +10,7 @@ dashedName: step-12
 Inside the template literal, create a `div` element with the `id` set to the `index` from the `.forEach()` array method. Remember to use template interpolation to do this.
 
 Also, add a `class` of `user-card` to the `div`.
- 
+
 # --hints--
 
 You should create a `div` element with the class `user-card`.
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
index 751b900d051..e42497c75ad 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
@@ -11,7 +11,7 @@ To see the authors' names on the page, you need to call the `displayAuthors` fun
 
 First, remove your `console.log()` statement. Then, assign `data` to the `authorDataArr` variable.
 
-# --hints-- 
+# --hints--
 
 You should remove the console log showing the `data`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daa5ea050f24a7cade6e6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daa5ea050f24a7cade6e6.md
index 8fd84169860..6aaa29790bc 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daa5ea050f24a7cade6e6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daa5ea050f24a7cade6e6.md
@@ -150,7 +150,7 @@ const fetchMoreAuthors = () => {
   displayAuthors(authorDataArr.slice(startingIndex, endingIndex));
   if (authorDataArr.length <= endingIndex) {
     --fcc-editable-region--
-    
+
     --fcc-editable-region--
   }
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daa8c2c3e364ac3650b37.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daa8c2c3e364ac3650b37.md
index 38f333fedc5..21ca08cbc44 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daa8c2c3e364ac3650b37.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daa8c2c3e364ac3650b37.md
@@ -163,7 +163,7 @@ const displayAuthors = (authors) => {
       <h2 class="author-name">${author}</h2>
       <img class="user-img" src="${image}" alt="${author} avatar" />
       --fcc-editable-region--
-    
+
       --fcc-editable-region--
       <p class="bio">${bio}</p>
       <a class="author-link" href="${url}" target="_blank">${author}'s author page</a>
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
index 4cf1725b8f2..9f3ef25d765 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
@@ -25,7 +25,7 @@ Your `p` element should have the class `bio`
 assert.match(code, /<p\s*class=("|')bio\1>/);
 ```
 
-You should check if the length of the `bio` text is greater than `50`. 
+You should check if the length of the `bio` text is greater than `50`.
 
 ```js
 assert.match(code, /<p\s*class=("|')bio\1>\s*\$\{\s*bio\.length\s*>\s*50/)
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
index 6fa6ca3db0c..b4ad5d7c770 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
@@ -7,7 +7,7 @@ dashedName: step-17
 
 # --description--
 
-In programming, it is standard practice to prefix a variable with `is` or `has` to indicate that the variable is a boolean. 
+In programming, it is standard practice to prefix a variable with `is` or `has` to indicate that the variable is a boolean.
 
 ```js
 let isRunning = true;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
index 5f4fff1de23..33177195353 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
@@ -210,7 +210,7 @@ let isError = false;
 
 --fcc-editable-region--
 function cleanInputString(str) {
-  
+
 }
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
index c46d9681b38..702895f1115 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
@@ -199,7 +199,7 @@ let isError = false;
 --fcc-editable-region--
 function cleanInputString(str) {
   const strArray = str.split('');
-  
+
 }
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
index a7b3a1d7d57..d0415579d0d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
@@ -213,7 +213,7 @@ function cleanInputString(str) {
   const strArray = str.split('');
   const cleanStrArray = [];
 
-  
+
 }
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
index c73c488a760..3a71b6071dc 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
@@ -213,6 +213,6 @@ function isInvalidInput(str) {
 }
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
index 879ef55a036..05fa045b914 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
@@ -7,9 +7,9 @@ dashedName: step-39
 
 # --description--
 
-JavaScript has a feature called <dfn>template literals</dfn>, which allow you to interpolate variables directly within a string. Template literals are denoted with backticks ``` `` ```, as opposed to single or double quotes. Variables can be passed in to a template literal by surrounding the variable with `${}` – the value of the variable will be inserted into the string.
+JavaScript has a feature called <dfn>template literals</dfn>, which allow you to interpolate variables directly within a string. Template literals are denoted with backticks ` `` `, as opposed to single or double quotes. Variables can be passed in to a template literal by surrounding the variable with `${}` – the value of the variable will be inserted into the string.
 
-For example:
+예시:
 
 ```js
 const name = "Naomi";
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
index f7234f6cda3..eb808734eca 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
@@ -210,7 +210,7 @@ function isInvalidInput(str) {
 function addEntry() {
   const targetInputContainer = document.querySelector(`#${entryDropdown.value} .input-container`);
   const entryNumber = targetInputContainer.querySelectorAll('input[type="text"]').length;
-  
+
 }
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
index e292b80d750..6c8bc199010 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
@@ -211,7 +211,7 @@ function addEntry() {
   const entryNumber = targetInputContainer.querySelectorAll('input[type="text"]').length;
   const HTMLString = `
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   `;
 }
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
index b72895d64bf..452d405eea2 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
@@ -11,7 +11,7 @@ The `list` parameter is going to be the result of a query selector, which will r
 
 In previous steps, you learned how to loop through an array using a `for` loop. You can also use a <dfn>for...of</dfn> loop to loop through an array and a `NodeList`.
 
-A `for...of` loop is used to iterate over elements in an iterable object like an array. The variable declared in the loop represents the current element being iterated over. 
+A `for...of` loop is used to iterate over elements in an iterable object like an array. The variable declared in the loop represents the current element being iterated over.
 
 ```js
 for (const element of elementArray) {
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
index c54f019177c..cc5bcadeca2 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
@@ -248,7 +248,7 @@ function getCaloriesFromInputs(list) {
     const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
-    
+
   }
 }
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
index a4c8a15ef41..22cd4072703 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
@@ -9,7 +9,7 @@ dashedName: step-61
 
 Browsers have a built in `alert()` function, which you can use to display a pop-up message to the user. The message to display is passed as the argument to the `alert()` function.
 
-Using a template literal, in your `if` block, call the `alert()` function to tell the user `Invalid Input: `, followed by the first value in the `invalidInputMatch` array.
+Using a template literal, in your `if` block, call the `alert()` function to tell the user `Invalid Input:`, followed by the first value in the `invalidInputMatch` array.
 
 # --hints--
 
@@ -19,14 +19,14 @@ You should call the `alert()` function in your `if` block.
 assert.match(getCaloriesFromInputs.toString(), /if\s*\(\s*invalidInputMatch\s*\)\s*\{\s*alert\(/);
 ```
 
-You should use a template literal to pass the `Invalid Input: ` message to the `alert()` function.
+You should use a template literal to pass the `Invalid Input:` message to the `alert()` function.
 
 ```js
 // because it transforms template literals...
 assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: /);
 ```
 
-You should display the first element of the `invalidInputMatch` array after the `Invalid Input: ` text by using a template literal.
+You should display the first element of the `invalidInputMatch` array after the `Invalid Input:` text by using a template literal.
 
 ```js
 assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\)/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
index b29dd45342f..bfce24570fe 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
@@ -11,7 +11,7 @@ Remember that `return` ends the execution of a function. After your `if` block,
 
 Use the addition assignment operator to add `currVal` to your `calories` total. You'll need to use the `Number` constructor to convert `currVal` to a number.
 
-The `Number` constructor is a function that converts a value to a number. If the value cannot be converted, it returns `NaN` which stands for "Not a Number". 
+The `Number` constructor is a function that converts a value to a number. If the value cannot be converted, it returns `NaN` which stands for "Not a Number".
 
 Here is an example:
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
index 02c5c62430a..1887f5ea38b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
@@ -260,7 +260,7 @@ function calculateCalories(e) {
   const surplusOrDeficit = remainingCalories < 0 ? 'Surplus' : 'Deficit';
   output.innerHTML = `
   <span class="${surplusOrDeficit.toLowerCase()}">${Math.abs(remainingCalories)} Calorie ${surplusOrDeficit}</span>
-  
+
   `;
 }
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
index 92b4e972273..b23e311ab0e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
@@ -11,7 +11,7 @@ Your next function will calculate the median value of an array of numbers. Start
 
 In the function, declare a `sorted` variable and assign it the value of sorting a copy of the `nums` array.
 
-You should use the `slice()` method for creating a shallow copy of the array. 
+You should use the `slice()` method for creating a shallow copy of the array.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
index 685d62ba96b..41ca4cc37d8 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
@@ -9,7 +9,7 @@ dashedName: step-45
 
 The concept of returning a function within a function is called <dfn>currying</dfn>. This approach allows you to create a variable that holds a function to be called later, but with a reference to the parameters of the outer function call.
 
-For example:
+예시:
 
 ```js
 const innerOne = elemValue(1);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
index 340f98877da..89e89d3ac90 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
@@ -99,7 +99,7 @@ const median = nums => {
 
 --fcc-editable-region--
 const spreadsheetFunctions = {
-  
+
   sum,
   average,
   median,
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
index d470977ba0c..3a606f8e1cf 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
@@ -96,7 +96,7 @@ window.onload = () => {
      const input = document.createElement("input");
      input.type = "text";
      input.id = letter + number;
- 
+
     })   
 --fcc-editable-region--
   })
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/6579fc66adaabbca6ceddb1f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/6579fc66adaabbca6ceddb1f.md
index 27d8dd0ead7..c6202937f44 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/6579fc66adaabbca6ceddb1f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/6579fc66adaabbca6ceddb1f.md
@@ -7,7 +7,7 @@ dashedName: step-1
 
 # --description--
 
-In this project, you will learn algorithmic thinking by building a dice game. There are a total of 6 rounds and for each round, the player can roll the dice up to 3 times and collect a score. 
+In this project, you will learn algorithmic thinking by building a dice game. There are a total of 6 rounds and for each round, the player can roll the dice up to 3 times and collect a score.
 
 The HTML and CSS have been provided for you. Feel free to explore them.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a018ddd0006ce5bc29fa4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a018ddd0006ce5bc29fa4.md
index f02691cc2e4..030392d6643 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a018ddd0006ce5bc29fa4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a018ddd0006ce5bc29fa4.md
@@ -7,7 +7,7 @@ dashedName: step-2
 
 # --description--
 
-The next step is to select all of the elements responsible for displaying the scores. 
+The next step is to select all of the elements responsible for displaying the scores.
 
 Use the `querySelectorAll()` method to access all of the `input` elements inside the `#score-options` `div` element and assign that result to a constant called `scoreInputs`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a05f6b5654ad24614a229.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a05f6b5654ad24614a229.md
index 28aa4bb0036..a133c7a5876 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a05f6b5654ad24614a229.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a05f6b5654ad24614a229.md
@@ -7,11 +7,11 @@ dashedName: step-3
 
 # --description--
 
-Next, access the elements responsible for displaying the current round text. 
+Next, access the elements responsible for displaying the current round text.
 
-Use `getElementById()` to access the element with the `id` of `current-round` and assign that to a constant called `currentRoundText`. 
+Use `getElementById()` to access the element with the `id` of `current-round` and assign that to a constant called `currentRoundText`.
 
-Then, use `getElementById()` to access the element with the `id` of `current-round-rolls` and assign that to a constant called `currentRoundRollsText`. 
+Then, use `getElementById()` to access the element with the `id` of `current-round-rolls` and assign that to a constant called `currentRoundRollsText`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0894e5b6acd463cf5aac.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0894e5b6acd463cf5aac.md
index dc93839d525..e074eae5a27 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0894e5b6acd463cf5aac.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0894e5b6acd463cf5aac.md
@@ -7,11 +7,11 @@ dashedName: step-4
 
 # --description--
 
-Next, access the elements responsible for displaying the score history and total text. 
+Next, access the elements responsible for displaying the score history and total text.
 
-Use `getElementById()` to access the element with the `id` of `total-score` and assign that to a constant called `totalScoreText`. 
+Use `getElementById()` to access the element with the `id` of `total-score` and assign that to a constant called `totalScoreText`.
 
-Then, use `getElementById()` to access the element with the `id` of `score-history` and assign that to a constant called `scoreHistory`. 
+Then, use `getElementById()` to access the element with the `id` of `score-history` and assign that to a constant called `scoreHistory`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0b3f420571d6a2208a18.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0b3f420571d6a2208a18.md
index b39ea0eec4e..b3aafe41df0 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0b3f420571d6a2208a18.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0b3f420571d6a2208a18.md
@@ -9,9 +9,9 @@ dashedName: step-5
 
 Next, access the buttons that are responsible for keeping the score and rolling the dice.
 
-Use `getElementById()` to access the element with the `id` of `roll-dice-btn` and assign that to a constant called `rollDiceBtn`. 
+Use `getElementById()` to access the element with the `id` of `roll-dice-btn` and assign that to a constant called `rollDiceBtn`.
 
-Then, use `getElementById()` to access the element with the `id` of `keep-score-btn` and assign that to a constant called `keepScoreBtn`. 
+Then, use `getElementById()` to access the element with the `id` of `keep-score-btn` and assign that to a constant called `keepScoreBtn`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0d3d9ce4e1d8794a3c14.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0d3d9ce4e1d8794a3c14.md
index 48413010d4d..1a520f7d119 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0d3d9ce4e1d8794a3c14.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0d3d9ce4e1d8794a3c14.md
@@ -7,11 +7,11 @@ dashedName: step-6
 
 # --description--
 
-Next, you will need to access the container responsible for displaying the rules. You will also need to access the button responsible for showing and hiding the rules. 
+Next, you will need to access the container responsible for displaying the rules. You will also need to access the button responsible for showing and hiding the rules.
 
-Use `querySelector()` to access the element with the `class` of `rules-container` and assign that to a constant called `rulesContainer`. 
+Use `querySelector()` to access the element with the `class` of `rules-container` and assign that to a constant called `rulesContainer`.
 
-Then, use `getElementById()` to access the element with the `id` of `rules-btn` and assign that to a constant called `rulesBtn`. 
+Then, use `getElementById()` to access the element with the `id` of `rules-btn` and assign that to a constant called `rulesBtn`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0ea50da0c8d9d6d7950a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0ea50da0c8d9d6d7950a.md
index 3c7793c006b..35d513c5a83 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0ea50da0c8d9d6d7950a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0ea50da0c8d9d6d7950a.md
@@ -9,7 +9,7 @@ dashedName: step-7
 
 When the user clicks on the `Show rules` button, they should be able to toggle between showing and hiding the game rules.
 
-Use `let` to create a variable called `isModalShowing` and assign it the value of `false`. 
+Use `let` to create a variable called `isModalShowing` and assign it the value of `false`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0fb4dab33fdaf82232c6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0fb4dab33fdaf82232c6.md
index 8bc1f3982ab..bdc22f3fd99 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0fb4dab33fdaf82232c6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a0fb4dab33fdaf82232c6.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-Each time the user rolls the dice, you will need to keep track of all of the dice values. 
+Each time the user rolls the dice, you will need to keep track of all of the dice values.
 
 Use `let` to create a variable called `diceValuesArr` and assign it the value of an empty array.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a16a3e36c17e088e55c8b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a16a3e36c17e088e55c8b.md
index b21f36faf8f..0c5490ecccc 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a16a3e36c17e088e55c8b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a16a3e36c17e088e55c8b.md
@@ -7,11 +7,11 @@ dashedName: step-9
 
 # --description--
 
-Throughout the game, you will need to keep track of the current score, total score, number of rolls and which round the player is on. 
+Throughout the game, you will need to keep track of the current score, total score, number of rolls and which round the player is on.
 
-Use `let` to declare three variables named `rolls`, `score`, and `totalScore` and set all of their values to the number `0`. 
+Use `let` to declare three variables named `rolls`, `score`, and `totalScore` and set all of their values to the number `0`.
 
-Then, use `let` to declare a variable named `round` and assign it the number `1`. 
+Then, use `let` to declare a variable named `round` and assign it the number `1`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a19e477dc04e36a86dffc.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a19e477dc04e36a86dffc.md
index 3e653aa9c0a..d259b0b8133 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a19e477dc04e36a86dffc.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657a19e477dc04e36a86dffc.md
@@ -7,9 +7,9 @@ dashedName: step-10
 
 # --description--
 
-When the user clicks on the `Show rules` button, the rules for the game should display on the screen. When they click on the button again, the rules should be hidden. In the next few steps, you will build out the toggle functionality to show and hide the rules. 
+When the user clicks on the `Show rules` button, the rules for the game should display on the screen. When they click on the button again, the rules should be hidden. In the next few steps, you will build out the toggle functionality to show and hide the rules.
 
-Start by using the `addEventListener()` method on the `rulesBtn`. For the first argument, pass in a `click` event and for the second argument pass in an empty arrow function. 
+Start by using the `addEventListener()` method on the `rulesBtn`. For the first argument, pass in a `click` event and for the second argument pass in an empty arrow function.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c7e53fa2354011942a466.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c7e53fa2354011942a466.md
index 4c8a14f9e4f..d510bc5e5ce 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c7e53fa2354011942a466.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c7e53fa2354011942a466.md
@@ -7,9 +7,9 @@ dashedName: step-11
 
 # --description--
 
-Every time the user clicks on the rules button, the current boolean value for the `isModalShowing` variable should toggle between `true` and `false`. 
+Every time the user clicks on the rules button, the current boolean value for the `isModalShowing` variable should toggle between `true` and `false`.
 
-Use the `logical NOT operator(!)` in front of your `isModalShowing` variable to invert the value and reassign that to the `isModalShowing` variable. 
+Use the `logical NOT operator(!)` in front of your `isModalShowing` variable to invert the value and reassign that to the `isModalShowing` variable.
 
 # --hints--
 
@@ -285,7 +285,7 @@ let rolls = 0;
 
 --fcc-editable-region--
 rulesBtn.addEventListener("click", () => {
-  
+
 });
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c82663a6b6a043f6c4b45.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c82663a6b6a043f6c4b45.md
index 1bd6af01060..0ea5d30d919 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c82663a6b6a043f6c4b45.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c82663a6b6a043f6c4b45.md
@@ -7,9 +7,9 @@ dashedName: step-12
 
 # --description--
 
-If `isModalShowing` is `true`, then you will need to show the rules and update the `rulesBtn` text. 
+If `isModalShowing` is `true`, then you will need to show the rules and update the `rulesBtn` text.
 
-Start by adding an `if` statement to check if `isModalShowing` is truthy. Inside your `if` statement, update the text content for the `rulesBtn` by assigning it the string value of `Hide Rules`. 
+Start by adding an `if` statement to check if `isModalShowing` is truthy. Inside your `if` statement, update the text content for the `rulesBtn` by assigning it the string value of `Hide Rules`.
 
 Below that, update the `display` property for your `rulesContainer` by assigning it the string value of `block`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c8ebc64810f0d603d6773.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c8ebc64810f0d603d6773.md
index 0a2b1ea3739..7dff178e1a8 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c8ebc64810f0d603d6773.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c8ebc64810f0d603d6773.md
@@ -7,9 +7,9 @@ dashedName: step-13
 
 # --description--
 
-If `isModalShowing` is `false`, then you will need to hide the rules and update the `rulesBtn` text. 
+If `isModalShowing` is `false`, then you will need to hide the rules and update the `rulesBtn` text.
 
-Below your `if` statement, add an `else` clause. Inside your `else` clause, update the text content for the `rulesBtn` by assigning it the string value of `Show Rules`. 
+Below your `if` statement, add an `else` clause. Inside your `else` clause, update the text content for the `rulesBtn` by assigning it the string value of `Show Rules`.
 
 Below that, update the `display` property for your `rulesContainer` by assigning it the string value of `none`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c91ad5028770fc68d6116.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c91ad5028770fc68d6116.md
index e8fbeee565f..74c94692202 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c91ad5028770fc68d6116.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c91ad5028770fc68d6116.md
@@ -7,9 +7,9 @@ dashedName: step-14
 
 # --description--
 
-When the user clicks on the `Roll the dice` button, five random die numbers should be generated and displayed on the screen. For the next few steps, you will build out this roll dice algorithm. 
+When the user clicks on the `Roll the dice` button, five random die numbers should be generated and displayed on the screen. For the next few steps, you will build out this roll dice algorithm.
 
-Start by creating an arrow function called `rollDice`. 
+Start by creating an arrow function called `rollDice`.
 
 # --hints--
 
@@ -277,7 +277,7 @@ let totalScore = 0;
 let round = 1; 
 let rolls = 0; 
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
 
 rulesBtn.addEventListener("click", () => {
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c9b39c73e91177e95596a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c9b39c73e91177e95596a.md
index 28c500d0c92..4f9ac7e6946 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c9b39c73e91177e95596a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c9b39c73e91177e95596a.md
@@ -7,7 +7,7 @@ dashedName: step-15
 
 # --description--
 
-Each time the user rolls the dice, the list of previous dice values should be reset. 
+Each time the user rolls the dice, the list of previous dice values should be reset.
 
 Inside your `rollDice` function, reassign an empty array to your `diceValuesArr` variable.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c9dbff0fee6196fa8dcff.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c9dbff0fee6196fa8dcff.md
index 845fb32db9a..5669d6d8721 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c9dbff0fee6196fa8dcff.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c9dbff0fee6196fa8dcff.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-When the user rolls the dice, you will need to generate 5 random numbers representing each die value. 
+When the user rolls the dice, you will need to generate 5 random numbers representing each die value.
 
 To start, create a `for` loop that will loop a total of 5 times.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c9f0af0e3d61abde1c005.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c9f0af0e3d61abde1c005.md
index 227aca43857..0fe5ac02f5b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c9f0af0e3d61abde1c005.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657c9f0af0e3d61abde1c005.md
@@ -306,7 +306,7 @@ const rollDice = () => {
 
   for (let i = 0; i < 5; i++) {
     --fcc-editable-region--
-    
+
     --fcc-editable-region--
   };
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ca764afcc5221ee01f1a9.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ca764afcc5221ee01f1a9.md
index 578f8de325f..34db030aa84 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ca764afcc5221ee01f1a9.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ca764afcc5221ee01f1a9.md
@@ -9,7 +9,7 @@ dashedName: step-21
 
 Now it is time to test out the `rollDice` function.
 
-Add an `addEventListener()` method on the `rollDiceBtn` element and pass in a `click` event for the first argument and an empty arrow function for the second argument. 
+Add an `addEventListener()` method on the `rollDiceBtn` element and pass in a `click` event for the first argument and an empty arrow function for the second argument.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ca813b0908a230e3eb488.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ca813b0908a230e3eb488.md
index f20c6ad014a..dbdac5cfafb 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ca813b0908a230e3eb488.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ca813b0908a230e3eb488.md
@@ -7,9 +7,9 @@ dashedName: step-22
 
 # --description--
 
-For each round in the game, users are allowed to roll the dice a maximum of three times. 
+For each round in the game, users are allowed to roll the dice a maximum of three times.
 
-Inside your callback function, add an `if` statement to check if `rolls` is strictly equal to the number `3`. 
+Inside your callback function, add an `if` statement to check if `rolls` is strictly equal to the number `3`.
 
 If the condition is `true`, show an `alert()` to display the message `You have made three rolls this round. Please select a score.`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ca92f931f5c243418c2f9.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ca92f931f5c243418c2f9.md
index c4154916616..5c1ef51aea9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ca92f931f5c243418c2f9.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ca92f931f5c243418c2f9.md
@@ -7,7 +7,7 @@ dashedName: step-23
 
 # --description--
 
-If the `rolls` limit has not been reached, then the user can still roll the dice in that round. 
+If the `rolls` limit has not been reached, then the user can still roll the dice in that round.
 
 Add an `else` clause below your `if` statement. Inside the `else` clause, increment `rolls` by one and then call the `rollDice` function.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cacdc21264127cc50cd7a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cacdc21264127cc50cd7a.md
index dc3583656bd..1183c372f4e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cacdc21264127cc50cd7a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cacdc21264127cc50cd7a.md
@@ -7,7 +7,7 @@ dashedName: step-25
 
 # --description--
 
-Inside your `updateStats` function, update the text content for the `currentRoundRollsText` by assigning `rolls` to `currentRoundRollsText.textContent`. 
+Inside your `updateStats` function, update the text content for the `currentRoundRollsText` by assigning `rolls` to `currentRoundRollsText.textContent`.
 
 Below that, update the text content for the `currentRoundText` by assigning `round` to `currentRoundText.textContent`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
index d81fed3d268..0e32099a903 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
@@ -7,7 +7,7 @@ dashedName: step-26
 
 # --description--
 
-To see the `round` and `rolls` values update on the screen, call your `updateStats` function inside the `else` clause of the `rollDiceBtn` event listener. 
+To see the `round` and `rolls` values update on the screen, call your `updateStats` function inside the `else` clause of the `rollDiceBtn` event listener.
 
 Now you should be able to roll the dice a few times and see the values update.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
index 3387478ac45..0e8628f0753 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
@@ -7,7 +7,7 @@ dashedName: step-27
 
 # --description--
 
-Each time you roll the dice, you could end up with a `"Three of a kind"`, `"Four of a kind"`, `"Full house"`, `"Straight"` or a random combination of numbers. Based on the outcome, you can make a selection and add points to your score. 
+Each time you roll the dice, you could end up with a `"Three of a kind"`, `"Four of a kind"`, `"Full house"`, `"Straight"` or a random combination of numbers. Based on the outcome, you can make a selection and add points to your score.
 
 Start by creating an arrow function called `updateRadioOption` that takes `optionNode` and `score` as parameters.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
index cd8c372f31a..d8e5103c95e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
@@ -7,7 +7,7 @@ dashedName: step-28
 
 # --description--
 
-To enable the radio buttons, you should set the `disabled` property on `scoreInputs[optionNode]` to `false`. 
+To enable the radio buttons, you should set the `disabled` property on `scoreInputs[optionNode]` to `false`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
index ede965fe171..a113b4ed19d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
@@ -7,7 +7,7 @@ dashedName: step-29
 
 # --description--
 
-Next, you will need to update the radio button's `value` to the current `score`. 
+Next, you will need to update the radio button's `value` to the current `score`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
index 46c95dfca4e..ce744214775 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
@@ -7,7 +7,7 @@ dashedName: step-30
 
 # --description--
 
-To display the current score, update the text content for the `span` element next to the radio button to be the following template literal: `, score = ${score}`. 
+To display the current score, update the text content for the `span` element next to the radio button to be the following template literal: `, score = ${score}`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
index b8706bbefc5..b30649cac4c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
@@ -7,7 +7,7 @@ dashedName: step-31
 
 # --description--
 
-To test out selecting a radio button option, call the `updateRadioOption` function and pass in the numbers `0` and `10` for the arguments. 
+To test out selecting a radio button option, call the `updateRadioOption` function and pass in the numbers `0` and `10` for the arguments.
 
 Roll the dice again and you should see that the first radio button is enabled and displays a current score of `10`.
 
@@ -317,7 +317,7 @@ rollDiceBtn.addEventListener("click", () => {
     updateStats();
 
     --fcc-editable-region--
-    
+
     --fcc-editable-region--
   }
 });
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cfad68610a4654bb171f4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cfad68610a4654bb171f4.md
index 6c1317aeb43..ac7d5cb587d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cfad68610a4654bb171f4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cfad68610a4654bb171f4.md
@@ -7,9 +7,9 @@ dashedName: step-34
 
 # --description--
 
-To detect if a roll result is a `"Three of a kind"` or a `"Four of a kind"`, you will need to count the number of occurrences for each unique number in the `arr`. 
+To detect if a roll result is a `"Three of a kind"` or a `"Four of a kind"`, you will need to count the number of occurrences for each unique number in the `arr`.
 
-Inside your `getHighestDuplicates` function, create a `const` variable called `counts` and assign it an empty object. 
+Inside your `getHighestDuplicates` function, create a `const` variable called `counts` and assign it an empty object.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d009db786a869aa68acfa.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d009db786a869aa68acfa.md
index 846eec39d53..dc5e995ca73 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d009db786a869aa68acfa.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d009db786a869aa68acfa.md
@@ -7,7 +7,7 @@ dashedName: step-35
 
 # --description--
 
-Below your `counts` variable, create a `for...of` loop that will iterate through your `arr`. The variable name for the `for...of` loop should be called `num`. 
+Below your `counts` variable, create a `for...of` loop that will iterate through your `arr`. The variable name for the `for...of` loop should be called `num`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
index 756c2a907e5..f06543d5374 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
@@ -9,7 +9,7 @@ dashedName: step-36
 
 For each iteration in the `arr`, you will need to check if the current number exists in the `counts` object.
 
-Inside your `for...of` loop, add an `if` statement to check if the `num` key exists in the `counts` object. If so, increment the value of `counts[num]` by `1`. 
+Inside your `for...of` loop, add an `if` statement to check if the `num` key exists in the `counts` object. If so, increment the value of `counts[num]` by `1`.
 
 Below your `if` statement, include an `else` clause that assigns `1` to `counts[num]` for the first occurrence of that number in the `counts` object.
 
@@ -320,7 +320,7 @@ const getHighestDuplicates = (arr) => {
 
   for (const num of arr) {
     --fcc-editable-region--
-    
+
     --fcc-editable-region--
   }
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d068a236fb16f00183e2b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d068a236fb16f00183e2b.md
index 25a39a20584..29a76cdf5ee 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d068a236fb16f00183e2b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d068a236fb16f00183e2b.md
@@ -319,7 +319,7 @@ const getHighestDuplicates = (arr) => {
   }
 
   --fcc-editable-region--
-    
+
   --fcc-editable-region--
 };
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0a5bf57d5c721d5e82e4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0a5bf57d5c721d5e82e4.md
index 90d3cbf9be2..9f898f1be16 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0a5bf57d5c721d5e82e4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0a5bf57d5c721d5e82e4.md
@@ -7,7 +7,7 @@ dashedName: step-38
 
 # --description--
 
-Next, create another `for...of` loop that loops through the `arr`. The variable name for the `for...of` loop should be called `num`. 
+Next, create another `for...of` loop that loops through the `arr`. The variable name for the `for...of` loop should be called `num`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
index 016e2ec8897..aa7a673361c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
@@ -322,7 +322,7 @@ const getHighestDuplicates = (arr) => {
 
 --fcc-editable-region--
   for (const num of arr) {
-    
+
   }
 --fcc-editable-region--
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0de92782dd7532563649.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0de92782dd7532563649.md
index b8f70a9ca12..fd66faa1067 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0de92782dd7532563649.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0de92782dd7532563649.md
@@ -7,11 +7,11 @@ dashedName: step-40
 
 # --description--
 
-To detect if the dice roll produced a `"Three of a kind"`, you will need to create an `if` statement to check if the current count is greater than or equal to `3` and greater than the current highest count. If so, assign `count` to the `highestCount` variable. 
+To detect if the dice roll produced a `"Three of a kind"`, you will need to create an `if` statement to check if the current count is greater than or equal to `3` and greater than the current highest count. If so, assign `count` to the `highestCount` variable.
 
 # --hints--
 
-Your `if` statement should have the condition of `count >= 3 && count > highestCount`. 
+Your `if` statement should have the condition of `count >= 3 && count > highestCount`.
 
 ```js
 assert.match(code, /if\s*\(\s*count\s*>=\s*3\s*&&\s*count\s*>\s*highestCount\s*\)\s*\{?\s*[\s\S]*?\}?/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0ff4bcc54e76bd79651b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0ff4bcc54e76bd79651b.md
index 8ead4dd7d03..141d9094216 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0ff4bcc54e76bd79651b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0ff4bcc54e76bd79651b.md
@@ -7,11 +7,11 @@ dashedName: step-41
 
 # --description--
 
-To detect if the dice roll produced a `"Four of a kind"`, you will need to create an `if` statement to check if the current count is greater than or equal to `4` and greater than the current highest count. If so, assign `count` to the `highestCount` variable. 
+To detect if the dice roll produced a `"Four of a kind"`, you will need to create an `if` statement to check if the current count is greater than or equal to `4` and greater than the current highest count. If so, assign `count` to the `highestCount` variable.
 
 # --hints--
 
-Your `if` statement should have the condition of `count >= 4 && count > highestCount`. 
+Your `if` statement should have the condition of `count >= 4 && count > highestCount`.
 
 ```js
 assert.match(code, /if\s*\(\s*count\s*>=\s*4\s*&&\s*count\s*>\s*highestCount\s*\)\s*\{?\s*[\s\S]*?\}?/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d10e12efdd577d27597ff.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d10e12efdd577d27597ff.md
index 51eff0044a5..dfa23821c75 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d10e12efdd577d27597ff.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d10e12efdd577d27597ff.md
@@ -9,7 +9,7 @@ dashedName: step-42
 
 If the user rolls a `"Three of a kind"` or `"Four of a kind"`, then they will receive a score totalling the sum of all five dice values.
 
-Use the `reduce` method on `diceValuesArr`. For the callback function, use `a` and `b` as parameters. Within the callback function, return the sum of `a` and `b`. For the initial value, use the number `0`. 
+Use the `reduce` method on `diceValuesArr`. For the callback function, use `a` and `b` as parameters. Within the callback function, return the sum of `a` and `b`. For the initial value, use the number `0`.
 
 Finally, assign the entire result to a `const` variable called `sumOfAllDice`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d14f730b1797b03e1175b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d14f730b1797b03e1175b.md
index 5930c0ee7e7..eb28273ce71 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d14f730b1797b03e1175b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d14f730b1797b03e1175b.md
@@ -9,7 +9,7 @@ dashedName: step-43
 
 If the highest number of duplicates is `4` or more, then you will want to enable the radio button for the `"Four of a kind"` option and display the score next to it.
 
-Add an `if` statement that checks if `highestCount` is greater than or equal to `4`. If so, call the `updateRadioOption` and pass in the number `1` and `sumOfAllDice` for the arguments. 
+Add an `if` statement that checks if `highestCount` is greater than or equal to `4`. If so, call the `updateRadioOption` and pass in the number `1` and `sumOfAllDice` for the arguments.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d16efbc877d7d0d0aec1a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d16efbc877d7d0d0aec1a.md
index 33326f97e4c..e174001af90 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d16efbc877d7d0d0aec1a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d16efbc877d7d0d0aec1a.md
@@ -9,7 +9,7 @@ dashedName: step-44
 
 If the highest number of duplicates is `3` or more, then you will want to enable the radio button for the `"Three of a kind"` option and display the score next to it.
 
-Add an `if` statement that checks if `highestCount` is greater than or equal to `3`. If so, call the `updateRadioOption` and pass in the number `0` and `sumOfAllDice` for the arguments. 
+Add an `if` statement that checks if `highestCount` is greater than or equal to `3`. If so, call the `updateRadioOption` and pass in the number `0` and `sumOfAllDice` for the arguments.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d1af3a6a54784a82a1e6d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d1af3a6a54784a82a1e6d.md
index 222ed77b213..451eab0de3a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d1af3a6a54784a82a1e6d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d1af3a6a54784a82a1e6d.md
@@ -11,7 +11,7 @@ Now it is time to see the result of your `getHighestDuplicates` function.
 
 Inside the `else` clause of the `rollDiceBtn` callback function, call the `getHighestDuplicates` function and pass in `diceValuesArr` for the argument.
 
-Try rolling the dice a few times to see if you can get a `"Three of a kind"`, `"Four of a kind"`, or `"None of the above"`. 
+Try rolling the dice a few times to see if you can get a `"Three of a kind"`, `"Four of a kind"`, or `"None of the above"`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d1d52d574588677347c7f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d1d52d574588677347c7f.md
index 1c51667fc3c..32b4bf5a468 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d1d52d574588677347c7f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d1d52d574588677347c7f.md
@@ -7,7 +7,7 @@ dashedName: step-47
 
 # --description--
 
-Before each dice roll, you will need to reset the values for the score `inputs` and `spans` so a new value can be displayed. 
+Before each dice roll, you will need to reset the values for the score `inputs` and `spans` so a new value can be displayed.
 
 Start by creating an arrow function called `resetRadioOption`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d301f80931609b9a5d110.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d301f80931609b9a5d110.md
index 6f5155fc3a2..9e78fb699e2 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d301f80931609b9a5d110.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d301f80931609b9a5d110.md
@@ -7,7 +7,7 @@ dashedName: step-48
 
 # --description--
 
-For each of the score inputs, you will need to disable the `input` and remove its checked attribute. 
+For each of the score inputs, you will need to disable the `input` and remove its checked attribute.
 
 Start by using a `forEach` on the `scoreInputs`. For the callback function, use `input` for the parameter name.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d368b5115bc137f38220d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d368b5115bc137f38220d.md
index f02a70405d0..974845cc0bc 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d368b5115bc137f38220d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d368b5115bc137f38220d.md
@@ -7,7 +7,7 @@ dashedName: step-49
 
 # --description--
 
-Inside your callback function, set the `input`'s `disabled` property to `true` and the `checked` property to `false`. 
+Inside your callback function, set the `input`'s `disabled` property to `true` and the `checked` property to `false`.
 
 # --hints--
 
@@ -18,7 +18,7 @@ assert.match(code, /input\.disabled\s*=\s*true/);
 ```
 
 You should set the `checked` property for the `input` to `false`.
-  
+
 ```js
 assert.match(code, /input\.checked\s*=\s*false/);
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d374ef92a36145abdd215.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d374ef92a36145abdd215.md
index 2189985d8df..d05dfbf082d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d374ef92a36145abdd215.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d374ef92a36145abdd215.md
@@ -9,7 +9,7 @@ dashedName: step-50
 
 For each of the score `span` elements, you will need to reset the text content.
 
-Start by adding a `forEach` to your `scoreSpans` variable. For the callback function, use `span` for the parameter name. 
+Start by adding a `forEach` to your `scoreSpans` variable. For the callback function, use `span` for the parameter name.
 
 Inside the callback function, set text content for each `span` to an empty string.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
index eb86e34b6b3..7de9930adb4 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
@@ -9,7 +9,7 @@ dashedName: step-51
 
 To see the results of your `resetRadioOption` function, you will need to call the function inside the `rollDiceBtn` callback function.
 
-Now, try rolling the dice again and you should see that the previous score `inputs` and `spans` reset before each new roll. 
+Now, try rolling the dice again and you should see that the previous score `inputs` and `spans` reset before each new roll.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d3ab710745d17697c633a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d3ab710745d17697c633a.md
index 23b4038923a..2147dda4d1d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d3ab710745d17697c633a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d3ab710745d17697c633a.md
@@ -9,7 +9,7 @@ dashedName: step-52
 
 When you roll the dice and make a selection, you are not able to keep the score you selected and move onto the next round. In the next few steps, you will build out an algorithm that keeps track of and displays each score for all six rounds of the game.
 
-Start by creating an arrow function called `updateScore` that has two parameters called `selectedValue` and `achieved`. 
+Start by creating an arrow function called `updateScore` that has two parameters called `selectedValue` and `achieved`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d459868330c1e1da6bd49.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d459868330c1e1da6bd49.md
index 5aafcafd044..f40063f6532 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d459868330c1e1da6bd49.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d459868330c1e1da6bd49.md
@@ -7,9 +7,9 @@ dashedName: step-53
 
 # --description--
 
-The `selectedValue` parameter represents the option the user chose during that round. 
+The `selectedValue` parameter represents the option the user chose during that round.
 
-To update the score, you will need to use the `+=` compound assignment operator to add the `selectedValue` to the `totalScore`. Make sure to wrap your `selectedValue` parameter inside a `parseInt` since this string value needs to be converted to an integer. 
+To update the score, you will need to use the `+=` compound assignment operator to add the `selectedValue` to the `totalScore`. Make sure to wrap your `selectedValue` parameter inside a `parseInt` since this string value needs to be converted to an integer.
 
 # --hints--
 
@@ -309,7 +309,7 @@ const updateRadioOption = (optionNode, score) => {
 
 --fcc-editable-region--
 const updateScore = (selectedValue, achieved) => {
-  
+
 };
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d4a7e2002f822c646204b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d4a7e2002f822c646204b.md
index f431320ddd5..b4d025f747d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d4a7e2002f822c646204b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d4a7e2002f822c646204b.md
@@ -7,9 +7,9 @@ dashedName: step-55
 
 # --description--
 
-After a user makes a selection, they should be able to keep that score and move onto the next round. 
+After a user makes a selection, they should be able to keep that score and move onto the next round.
 
-Add an event listener to your `keepScoreBtn` variable that takes in a `click` event for the first argument and an empty arrow function for the second argument. 
+Add an event listener to your `keepScoreBtn` variable that takes in a `click` event for the first argument and an empty arrow function for the second argument.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d4d734e523a257125596b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d4d734e523a257125596b.md
index 2c0fe881f79..e4e8c890676 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d4d734e523a257125596b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d4d734e523a257125596b.md
@@ -7,9 +7,9 @@ dashedName: step-57
 
 # --description--
 
-To figure out which selection was made, you will need to loop through each radio button to see which one has the checked attribute. 
+To figure out which selection was made, you will need to loop through each radio button to see which one has the checked attribute.
 
-Use a `for...of` loop to loop through each of the `scoreInputs`. The variable name for the `for...of` loop should be called `radioButton`. 
+Use a `for...of` loop to loop through each of the `scoreInputs`. The variable name for the `for...of` loop should be called `radioButton`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d4eb2785e0d268dbd2ad2.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d4eb2785e0d268dbd2ad2.md
index 2d3c2915b5f..693708a6fdc 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d4eb2785e0d268dbd2ad2.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d4eb2785e0d268dbd2ad2.md
@@ -9,7 +9,7 @@ dashedName: step-58
 
 If the current radio button inside the loop has the checked attribute, then you will need to get its `value` and `id`.
 
-Add an `if` statement inside your `for...loop`, with a condition of `radioButton.checked`. 
+Add an `if` statement inside your `for...loop`, with a condition of `radioButton.checked`.
 
 Inside your `if` statement, assign `radioButton.value` to `selectedValue` and assign `radioButton.id` to `achieved`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d509785c2f12828d7196f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d509785c2f12828d7196f.md
index db26ba7bec4..99404d64b90 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d509785c2f12828d7196f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d509785c2f12828d7196f.md
@@ -7,9 +7,9 @@ dashedName: step-59
 
 # --description--
 
-If the user makes a selection, then the rounds, rolls and scores should be updated. 
+If the user makes a selection, then the rounds, rolls and scores should be updated.
 
-Add an `if` statement, to check if `selectedValue` is truthy. If so, reassign the number `0` to `rolls` and increment `round` by `1`. 
+Add an `if` statement, to check if `selectedValue` is truthy. If so, reassign the number `0` to `rolls` and increment `round` by `1`.
 
 Then, call the `updateStats` and `resetRadioOption` functions. And lastly, call the `updateScore` function and pass in `selectedValue` and `achieved` for the arguments.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d535901979b2a4b2a345c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d535901979b2a4b2a345c.md
index 3409fb70e81..79aad79199a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d535901979b2a4b2a345c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d535901979b2a4b2a345c.md
@@ -7,7 +7,7 @@ dashedName: step-60
 
 # --description--
 
-If you try to click on the keep score button without making a selection, then nothing happens. 
+If you try to click on the keep score button without making a selection, then nothing happens.
 
 To fix this, add an `else` clause to your `if` statement, and place an `alert` inside. For your `alert`, use the following message: `"Please select an option or roll the dice"`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d552526c0d72beb57160f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d552526c0d72beb57160f.md
index 1cf9f9fda7e..f8852325e73 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d552526c0d72beb57160f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d552526c0d72beb57160f.md
@@ -7,9 +7,9 @@ dashedName: step-61
 
 # --description--
 
-At this point in the game, you are able to roll the dice, make a selection and play for a few rounds. However, you should notice that there is no end to the game and there are infinite rounds. 
+At this point in the game, you are able to roll the dice, make a selection and play for a few rounds. However, you should notice that there is no end to the game and there are infinite rounds.
 
-According to the rules, there should be a total of six rounds and then the game ends with the final score. 
+According to the rules, there should be a total of six rounds and then the game ends with the final score.
 
 Inside the `if` statement for your `keepScoreBtn` event listener, add a new `if` statement to check if `round` is greater than the number `6`.
 
@@ -406,7 +406,7 @@ keepScoreBtn.addEventListener("click", () => {
     resetRadioOption();
     updateScore(selectedValue, achieved);
     --fcc-editable-region--
-    
+
     --fcc-editable-region--
   } else {
     alert("Please select an option or roll the dice");
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfc42adf7696260da54f1.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfc42adf7696260da54f1.md
index db2f6e967fb..1badcfc0bb3 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfc42adf7696260da54f1.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfc42adf7696260da54f1.md
@@ -7,7 +7,7 @@ dashedName: step-62
 
 # --description--
 
-Inside your `if` statement, add a `setTimeout` function that takes in a callback function and a delay set to `500` milliseconds. 
+Inside your `if` statement, add a `setTimeout` function that takes in a callback function and a delay set to `500` milliseconds.
 
 Inside your `setTimeout` function, add an `alert` with the message of `Game Over! Your total score is ${totalScore}`.
 
@@ -15,7 +15,7 @@ Inside your `setTimeout` function, add an `alert` with the message of `Game Over
 
 
 You should have a `setTimeout` function inside your `if` statement with a callback function and delay set to `500` milliseconds.
-  
+
 ```js
 assert.match(code, /setTimeout\s*\(.*\s*=>[\s\S]*,\s*500\s*\)/);
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
index 3fdc189eff5..b6281278c20 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
@@ -7,19 +7,19 @@ dashedName: step-63
 
 # --description--
 
-If you go through six rounds of the game, you should see the `alert` show up with your final score. But when you dismiss the `alert`, you are able to keep playing for more rounds past the original six. To fix this, you will need to reset the game. 
+If you go through six rounds of the game, you should see the `alert` show up with your final score. But when you dismiss the `alert`, you are able to keep playing for more rounds past the original six. To fix this, you will need to reset the game.
 
-Start by creating an arrow function called `resetGame`. 
+Start by creating an arrow function called `resetGame`.
 
 # --hints--
 
-You should have a function called `resetGame`. 
+You should have a function called `resetGame`.
 
 ```js
 assert.isFunction(resetGame);
 ```
 
-You should use arrow syntax for your `resetGame` function. 
+You should use arrow syntax for your `resetGame` function.
 
 ```js
 assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*;?/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
index 10f6634ecd0..b9278c7f075 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
@@ -9,7 +9,7 @@ dashedName: step-64
 
 Inside your `resetGame` function, reassign the `diceValuesArr` variable to an array of five zeros.
 
-Below that, reassign the variables `score`, `totalScore` and `rolls` to `0`. 
+Below that, reassign the variables `score`, `totalScore` and `rolls` to `0`.
 
 Lastly, reassign the `round` variable to `1`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
index a8e2b609060..65aa4696347 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
@@ -7,7 +7,7 @@ dashedName: step-65
 
 # --description--
 
-To reset each of the dice values to show `0`, apply a `forEach` method to the `listOfAllDice` variable. For your callback function, use `dice` and `index` as parameters. 
+To reset each of the dice values to show `0`, apply a `forEach` method to the `listOfAllDice` variable. For your callback function, use `dice` and `index` as parameters.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should call the `forEach` method of the `listOfAllDice` variable.
 assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
 ```
 
-For your callback function, you should use `dice` and `index` as parameters. 
+For your callback function, you should use `dice` and `index` as parameters.
 
 ```js
 assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
index 16ee2b1c016..fef565d78af 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
@@ -367,7 +367,7 @@ const resetGame = () => {
   rolls = 0;
 --fcc-editable-region--
   listOfAllDice.forEach((dice, index) => {
-   
+
   });
 --fcc-editable-region--
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
index cab1b1f0054..a02aa74f6cc 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
@@ -11,7 +11,7 @@ Next, update the score history, total, rounds and rolls text.
 
 Start by updating the text content for the `totalScoreText` by assigning it the value of `totalScore`. Below that, update the HTML content for the `scoreHistory` by assigning it an empty string.
 
-Below that, update the text content for the `currentRoundRollsText` by assigning it the `rolls` variable. 
+Below that, update the text content for the `currentRoundRollsText` by assigning it the `rolls` variable.
 
 Lastly, update the `currentRoundText` text content by assigning it the `round` variable.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0846af6cff6cf9b792db.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0846af6cff6cf9b792db.md
index 567b578b107..f86822b16b5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0846af6cff6cf9b792db.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0846af6cff6cf9b792db.md
@@ -7,7 +7,7 @@ dashedName: step-68
 
 # --description--
 
-The last part of your `resetGame` function is to call the `resetRadioOption` function. This will reset all of the radio buttons. 
+The last part of your `resetGame` function is to call the `resetRadioOption` function. This will reset all of the radio buttons.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e09d4802a136e868a7f5e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e09d4802a136e868a7f5e.md
index 23824866bae..85511623913 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e09d4802a136e868a7f5e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e09d4802a136e868a7f5e.md
@@ -7,13 +7,13 @@ dashedName: step-69
 
 # --description--
 
-To reset the game after six rounds, you will need to call your `resetGame` function inside the `keepScoreBtn` event listener. 
+To reset the game after six rounds, you will need to call your `resetGame` function inside the `keepScoreBtn` event listener.
 
-Now you should be able to play the game for six rounds, end the game and have it reset for you. 
+Now you should be able to play the game for six rounds, end the game and have it reset for you.
 
 # --hints--
 
-You should call your `resetGame` function inside the `keepScoreBtn` event listener. 
+You should call your `resetGame` function inside the `keepScoreBtn` event listener.
 
 ```js
 assert.match(code, /resetGame\s*\(\s*\);?/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0c2c6a9d37705146f34d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0c2c6a9d37705146f34d.md
index 2d5108c42aa..a419709eb89 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0c2c6a9d37705146f34d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0c2c6a9d37705146f34d.md
@@ -7,7 +7,7 @@ dashedName: step-70
 
 # --description--
 
-If the user rolls a `"Three of a kind"` and a pair, then they can receive `25` points for that round. This is known as a full house. 
+If the user rolls a `"Three of a kind"` and a pair, then they can receive `25` points for that round. This is known as a full house.
 
 For the next few steps you will build out an algorithm to check for both a `"Three of a kind"` and a pair and display that option on the screen.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0f2a6cb19c72b8760be5.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0f2a6cb19c72b8760be5.md
index 6bd22ea8cf1..837bcd019c5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0f2a6cb19c72b8760be5.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0f2a6cb19c72b8760be5.md
@@ -7,11 +7,11 @@ dashedName: step-71
 
 # --description--
 
-To count the occurrences for each number, use a `for...of` loop to iterate through every element of the `arr`. The variable name for the `for...of` loop should be called `num`. 
+To count the occurrences for each number, use a `for...of` loop to iterate through every element of the `arr`. The variable name for the `for...of` loop should be called `num`.
 
 # --hints--
 
-You should use a `for...of` loop to iterate through the `arr` array. 
+You should use a `for...of` loop to iterate through the `arr` array.
 
 ```js
 assert.match(code, /const\s+detectFullHouse\s*=\s*(\(\s*arr\s*\)|arr)\s*=>\s*{.*\s*for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*.*}/s);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
index a64d3b1bce2..93c52a5711d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
@@ -349,7 +349,7 @@ const detectFullHouse = (arr) => {
 
 --fcc-editable-region--
   for (const num of arr) {
-    
+
   }
 --fcc-editable-region--
 }
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
index 39b52dd4517..b32ef487eb2 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
@@ -7,9 +7,9 @@ dashedName: step-73
 
 # --description--
 
-If the `counts` object has a value of the number `3`, then that means the user rolled a `Three of a kind`. 
+If the `counts` object has a value of the number `3`, then that means the user rolled a `Three of a kind`.
 
-Start by using the `Object.values()` method and pass in `counts` for the argument. This will create an array of only the `counts` values. 
+Start by using the `Object.values()` method and pass in `counts` for the argument. This will create an array of only the `counts` values.
 
 Then chain the `includes` method and pass in the number `3`. This will check if `3` is inside this new array.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
index 7eb3a3d4366..ad8809cdf97 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
@@ -7,9 +7,9 @@ dashedName: step-74
 
 # --description--
 
-If the `counts` object has a value of the number `2`, then that means the user has rolled a pair. 
+If the `counts` object has a value of the number `2`, then that means the user has rolled a pair.
 
-Start by using the `Object.values()` method and pass in `counts` for the argument. 
+Start by using the `Object.values()` method and pass in `counts` for the argument.
 
 Then chain the `includes` method and pass in the number `2`. This will check if `2` is inside this new array.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e18b58d9f6a7ac1544999.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e18b58d9f6a7ac1544999.md
index 5a30673bc53..b674d56d4eb 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e18b58d9f6a7ac1544999.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e18b58d9f6a7ac1544999.md
@@ -9,7 +9,7 @@ dashedName: step-75
 
 If the user has rolled both a pair and `Three of a kind`, then they have received a `Full house` resulting in `25` points.
 
-Add an `if` statement to check if both `hasThreeOfAKind` and `hasPair` are `true`. If so, call the `updateRadioOption` and pass in the numbers `2` and `25`. 
+Add an `if` statement to check if both `hasThreeOfAKind` and `hasPair` are `true`. If so, call the `updateRadioOption` and pass in the numbers `2` and `25`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e1bfa4f1f5d7d5c14d43d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e1bfa4f1f5d7d5c14d43d.md
index fcd3fe741ba..b32af5f3d32 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e1bfa4f1f5d7d5c14d43d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e1bfa4f1f5d7d5c14d43d.md
@@ -7,7 +7,7 @@ dashedName: step-76
 
 # --description--
 
-If the user did not get a `Full house` then the option for `None of the above` should be enabled with `0` points awarded. 
+If the user did not get a `Full house` then the option for `None of the above` should be enabled with `0` points awarded.
 
 Below your `if` statement, call the `updateRadioOption` function and pass in the numbers `5` and `0` for the arguments.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e21575e71e2822f3b0abd.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e21575e71e2822f3b0abd.md
index 01250574573..851f7145f98 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e21575e71e2822f3b0abd.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e21575e71e2822f3b0abd.md
@@ -7,13 +7,13 @@ dashedName: step-77
 
 # --description--
 
-To see the results of your `detectFullHouse` function, call your `detectFullHouse` function inside the `rollDiceBtn` event listener and pass in the `diceValuesArr` variable for the argument. 
+To see the results of your `detectFullHouse` function, call your `detectFullHouse` function inside the `rollDiceBtn` event listener and pass in the `diceValuesArr` variable for the argument.
 
 Try playing a few rounds of the game to see if you can land on a `Full house`.
 
 # --hints--
 
-You should call the `detectFullHouse` and pass in the `diceValuesArr` variable for the argument. 
+You should call the `detectFullHouse` and pass in the `diceValuesArr` variable for the argument.
 
 ```js
 assert.match(code, /detectFullHouse\s*\(\s*diceValuesArr\s*\);?/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e230500602983e01fff6e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e230500602983e01fff6e.md
index 6f77a104776..70ca8e9a749 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e230500602983e01fff6e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e230500602983e01fff6e.md
@@ -7,7 +7,7 @@ dashedName: step-78
 
 # --description--
 
-For the last portion of the game, you will need to create an algorithm that checks for the presence of a straight. 
+For the last portion of the game, you will need to create an algorithm that checks for the presence of a straight.
 
 A small straight is when four of the dice have consecutive values(`Ex. 1234`) resulting in a score of `30` points. A large straight is when all five dice have consecutive values(`Ex. 12345`) resulting in a score of `40` points.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
index eaab72b76fa..ac4e5d43883 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
@@ -9,7 +9,7 @@ dashedName: step-79
 
 To check for a small or large straight, you will need to first sort the list of numbers in the array.
 
-Use the `sort` method on the `arr` parameter and pass in a callback function. For the callback function, use `a` and `b` for the parameters and implicitly return `a - b`.  
+Use the `sort` method on the `arr` parameter and pass in a callback function. For the callback function, use `a` and `b` for the parameters and implicitly return `a - b`.
 
 Assign that entire result to a `const` variable called `sortedNumbersArr`.
 
@@ -33,7 +33,7 @@ You should apply the `sort` array method on the `arr` parameter.
 assert.match(code, /const\s+sortedNumbersArr\s*=\s*arr\.sort\(.*\);?/);
 ```
 
-Your callback function should use `a` and `b` for the parameters and implicitly return `a - b`.  
+Your callback function should use `a` and `b` for the parameters and implicitly return `a - b`.
 
 ```js
 assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(\s*a,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\));?/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e27774cb16b8810c18ba8.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e27774cb16b8810c18ba8.md
index df38ec8aa31..44b311fbb46 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e27774cb16b8810c18ba8.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e27774cb16b8810c18ba8.md
@@ -7,7 +7,7 @@ dashedName: step-80
 
 # --description--
 
-To check for only unique numbers, you will need to use a `Set` on your `sortedNumbersArr`. Convert that result into an array using the spread operator. 
+To check for only unique numbers, you will need to use a `Set` on your `sortedNumbersArr`. Convert that result into an array using the spread operator.
 
 Lastly, assign that entire result to a `const` variable called `uniqueNumbersArr`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2bac662a3c8f5801d550.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2bac662a3c8f5801d550.md
index f78c728094c..ba4c7c89ace 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2bac662a3c8f5801d550.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2bac662a3c8f5801d550.md
@@ -7,7 +7,7 @@ dashedName: step-81
 
 # --description--
 
-Next, use the `join` method on the `uniqueNumbersArr` and assign that result to a `const` variable called `uniqueNumbersStr`. For the `join` method use an empty string for the separator. 
+Next, use the `join` method on the `uniqueNumbersArr` and assign that result to a `const` variable called `uniqueNumbersStr`. For the `join` method use an empty string for the separator.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
index 065f1200ad7..8dc77d2b8c5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
@@ -9,7 +9,7 @@ dashedName: step-82
 
 There are a total of 3 possibilities for a small straight: `"1234"`, `"2345"`, and `"3456"`.
 
-Create a `const` variable called `smallStraightsArr` and assign it the value of an array containing the three string values listed above. 
+Create a `const` variable called `smallStraightsArr` and assign it the value of an array containing the three string values listed above.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
index c6079616913..178109f5af5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
@@ -9,7 +9,7 @@ dashedName: step-83
 
 There are only two possibilities for a large straight: `"12345"` and `"23456"`.
 
-Create a `const` variable called `largeStraightsArr` and assign it the value of an array containing the two string values listed above. 
+Create a `const` variable called `largeStraightsArr` and assign it the value of an array containing the two string values listed above.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
index b5beda91ab1..19d24cbc9cc 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
@@ -9,7 +9,7 @@ dashedName: step-84
 
 If the user rolls a small straight, then the `Small straight` radio button option should be enabled with a score of `30` points.
 
-Start by creating an `if` statement to check if `uniqueNumbersStr` is included in the `smallStraightsArr`. If so, call the `updateRadioOption` with `3` and `30` for the arguments. 
+Start by creating an `if` statement to check if `uniqueNumbersStr` is included in the `smallStraightsArr`. If so, call the `updateRadioOption` with `3` and `30` for the arguments.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should use the `includes` method to check if `uniqueNumbersStr` is included
 assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
-You should call your `updateRadioOption` with `3` and `30` for the arguments. 
+You should call your `updateRadioOption` with `3` and `30` for the arguments.
 
 ```js
 assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
index 71935eceef8..1c742691b36 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
@@ -9,7 +9,7 @@ dashedName: step-85
 
 If the user rolls a large straight, then the `Large straight` radio button option should be enabled with a score of `40` points.
 
-Start by creating an `if` statement to check if `uniqueNumbersStr` is included in the `largeStraightsArr`. If so, call the `updateRadioOption` with `4` and `40` for the arguments. 
+Start by creating an `if` statement to check if `uniqueNumbersStr` is included in the `largeStraightsArr`. If so, call the `updateRadioOption` with `4` and `40` for the arguments.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should use the `includes` method to check if `uniqueNumbersStr` is included
 assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
-You should call your `updateRadioOption` with `4` and `40` for the arguments. 
+You should call your `updateRadioOption` with `4` and `40` for the arguments.
 
 ```js
 assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e390964da9f9bff8f3625.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e390964da9f9bff8f3625.md
index 723c59e6065..86131e4799c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e390964da9f9bff8f3625.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e390964da9f9bff8f3625.md
@@ -7,13 +7,13 @@ dashedName: step-87
 
 # --description--
 
-To see the results of your `checkForStraights` function, call your `checkForStraights` function inside the `rollDiceBtn` event listener and pass in the `diceValuesArr` variable for the argument. 
+To see the results of your `checkForStraights` function, call your `checkForStraights` function inside the `rollDiceBtn` event listener and pass in the `diceValuesArr` variable for the argument.
 
-And with that last change, you have completed your dice game! 
+And with that last change, you have completed your dice game!
 
 # --hints--
 
-You should call the `checkForStraights` function and pass in the `diceValuesArr` variable for the argument. 
+You should call the `checkForStraights` function and pass in the `diceValuesArr` variable for the argument.
 
 ```js
 assert.match(code, /checkForStraights\s*\(\s*diceValuesArr\s*\);?/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461815bc48998eb15d55349.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461815bc48998eb15d55349.md
index 4c06752d7bf..aa8c9e8501d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461815bc48998eb15d55349.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461815bc48998eb15d55349.md
@@ -7,9 +7,9 @@ dashedName: step-1
 
 # --description--
 
-In this project, you are going to learn intermediate Object Oriented Programming principles by building a platformer game. All of the HTML and CSS have been provided for you. 
+In this project, you are going to learn intermediate Object Oriented Programming principles by building a platformer game. All of the HTML and CSS have been provided for you.
 
-Start by using `document.getElementById()` to get the `#start-btn` and `#canvas` elements. 
+Start by using `document.getElementById()` to get the `#start-btn` and `#canvas` elements.
 
 Store them in `const` variables named `startBtn` and `canvas` respectively.
 
@@ -27,7 +27,7 @@ You should get the element with the `id` of `start-btn`.
 assert.match(code, /document\.getElementById\(\s*('|"|`)start-btn\1\s*\)/);
 ```
 
-You should use `const` to declare the variable called `startBtn` and assign it the `#start-btn` element. 
+You should use `const` to declare the variable called `startBtn` and assign it the `#start-btn` element.
 
 ```js
 assert.match(code, /const\s+startBtn\s*=\s*document\.getElementById\(\s*('|"|`)start-btn\1\s*\)/);
@@ -39,7 +39,7 @@ You should use the `document.getElementById()` method to get the `#canvas` eleme
 assert.match(code, /document\.getElementById\(\s*('|"|`)canvas\1\s*\)/);
 ```
 
-You should use `const` to declare the variable called `canvas` and assign it the `#canvas` element. 
+You should use `const` to declare the variable called `canvas` and assign it the `#canvas` element.
 
 ```js
 assert.match(code, /const\s+canvas\s*=\s*document\.getElementById\(\s*('|"|`)canvas\1\s*\)/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461a1b2d5f508f374d72d30.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461a1b2d5f508f374d72d30.md
index 7d20b45f1e7..8aad1be436c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461a1b2d5f508f374d72d30.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461a1b2d5f508f374d72d30.md
@@ -7,9 +7,9 @@ dashedName: step-2
 
 # --description--
 
-Next, you will need to use `document.querySelector` to get the `.start-screen` and `.checkpoint-screen` elements. 
+Next, you will need to use `document.querySelector` to get the `.start-screen` and `.checkpoint-screen` elements.
 
-Store them in `const` variables called `startScreen` and `checkpointScreen` respectively. 
+Store them in `const` variables called `startScreen` and `checkpointScreen` respectively.
 
 # --hints--
 
@@ -25,7 +25,7 @@ You should get the element with the `class` of `start-screen`. Don't forget to i
 assert.match(code, /document\.querySelector\(\s*('|"|`)\.start-screen\1\s*\)/);
 ```
 
-You should use `const` to declare the variable called `startScreen` and assign it the `.start-screen` element. 
+You should use `const` to declare the variable called `startScreen` and assign it the `.start-screen` element.
 
 ```js
 assert.match(code, /const\s+startScreen\s*=\s*document\.querySelector\(\s*('|"|`)\.start-screen\1\s*\)/);
@@ -37,7 +37,7 @@ You should use the `document.querySelector()` method to get the `.checkpoint-scr
 assert.match(code, /document\.querySelector\(\s*('|"|`)\.checkpoint-screen\1\s*\)/);
 ```
 
-You should use `const` to declare the variable called `checkpointScreen` and assign it the `.checkpoint-screen` element. 
+You should use `const` to declare the variable called `checkpointScreen` and assign it the `.checkpoint-screen` element.
 
 ```js
 assert.match(code, /const\s+checkpointScreen\s*=\s*document\.querySelector\(\s*('|"|`)\.checkpoint-screen\1\s*\)/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461abe3ad3609f436f3a087.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461abe3ad3609f436f3a087.md
index ad3ead7f38d..ca6262226bc 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461abe3ad3609f436f3a087.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461abe3ad3609f436f3a087.md
@@ -7,9 +7,9 @@ dashedName: step-3
 
 # --description--
 
-The next step is to target the paragraph element inside the `.checkpoint-screen` element. 
+The next step is to target the paragraph element inside the `.checkpoint-screen` element.
 
-Use `document.querySelector` and the child combinator `>` to target the paragraph element. 
+Use `document.querySelector` and the child combinator `>` to target the paragraph element.
 
 Assign that value to a `const` variable called `checkpointMessage`.
 
@@ -21,7 +21,7 @@ You should use the child combinator `>` to access the paragraph element inside t
 assert.match(code, /document\.querySelector\(\s*('|"|`)\.checkpoint-screen\s+>\s+p\1\s*\)/);
 ```
 
-You should use `const` to declare the variable called `checkpointMessage` and assign it the `p` element inside the `.checkpoint-screen` element. 
+You should use `const` to declare the variable called `checkpointMessage` and assign it the `p` element inside the `.checkpoint-screen` element.
 
 ```js
 assert.match(code, /const\s+checkpointMessage\s*=\s*document\.querySelector\(\s*('|"|`)\.checkpoint-screen\s+>\s+p\1\s*\)/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461b0b3dc4034f4f70a4929.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461b0b3dc4034f4f70a4929.md
index f5a64cea17a..4fe03e1dd67 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461b0b3dc4034f4f70a4929.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461b0b3dc4034f4f70a4929.md
@@ -9,7 +9,7 @@ dashedName: step-4
 
 Before you can begin building out the functionality for the game, you will need to set up the ability to add 2D graphics.
 
-The <dfn>Canvas API</dfn> can be used to create graphics in games using JavaScript and the HTML `canvas` element. 
+The <dfn>Canvas API</dfn> can be used to create graphics in games using JavaScript and the HTML `canvas` element.
 
 You will need to use the `getContext` method which will provide the context for where the graphics will be rendered.
 
@@ -21,7 +21,7 @@ Assign that `getContext` method to a `const` variable called `ctx`.
 
 # --hints--
 
-You should use the `canvas.getContext("2d")` method. 
+You should use the `canvas.getContext("2d")` method.
 
 ```js
 assert.match(code, /canvas\.getContext\(\s*('|"|`)2d\1\s*\)/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461baf1e276bdfe3b8ff92a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461baf1e276bdfe3b8ff92a.md
index 673577e09d7..0a4c9a56c0c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461baf1e276bdfe3b8ff92a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6461baf1e276bdfe3b8ff92a.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-The `canvas` element has a `width` property which is a positive number that represents the width of the canvas. 
+The `canvas` element has a `width` property which is a positive number that represents the width of the canvas.
 
 ```js
 canvas.width
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64800ffcc075d9af2f52f034.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64800ffcc075d9af2f52f034.md
index 86f07148dd8..e8a370bef0c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64800ffcc075d9af2f52f034.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64800ffcc075d9af2f52f034.md
@@ -9,7 +9,7 @@ dashedName: step-6
 
 The `innerWidth` property is a number that represents the interior width of the browser window.
 
-Assign `innerWidth` to `canvas.width`. 
+Assign `innerWidth` to `canvas.width`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/648166a88629ccc03452bf04.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/648166a88629ccc03452bf04.md
index 73ae44d7117..f1e5a311683 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/648166a88629ccc03452bf04.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/648166a88629ccc03452bf04.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-In your platformer game, the main player will need to jump between the different platforms. When the player jumps, you will need to apply gravity to bring them back down. 
+In your platformer game, the main player will need to jump between the different platforms. When the player jumps, you will need to apply gravity to bring them back down.
 
 Create a new `const` variable called `gravity` and assign it the number `0.5`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6482b07e8a3dcacbbbfa43f6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6482b07e8a3dcacbbbfa43f6.md
index 219c36ba231..7d0c6602a58 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6482b07e8a3dcacbbbfa43f6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6482b07e8a3dcacbbbfa43f6.md
@@ -9,7 +9,7 @@ dashedName: step-9
 
 In the game, the player will have the opportunity to cross different checkpoints. You will need to keep track of the status for the checkpoint collision detection.
 
-Use `let` to create a new variable called `isCheckpointCollisionDetectionActive` and assign it the value of `true`. 
+Use `let` to create a new variable called `isCheckpointCollisionDetectionActive` and assign it the value of `true`.
 
 # --hints--
 
@@ -20,7 +20,7 @@ assert.match(code, /let\s+isCheckpointCollisionDetectionActive/);
 ```
 
 
-You should assign the value of `true` to `isCheckpointCollisionDetectionActive` 
+You should assign the value of `true` to `isCheckpointCollisionDetectionActive`
 
 ```js
 assert.match(code, /let\s+isCheckpointCollisionDetectionActive\s*=\s*true/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6482bc5d699f0acfc52bdc41.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6482bc5d699f0acfc52bdc41.md
index 3e2d60cff4f..03ddec5b50a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6482bc5d699f0acfc52bdc41.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6482bc5d699f0acfc52bdc41.md
@@ -10,7 +10,7 @@ dashedName: step-11
 Inside your `Player` class, you will need to define the player's position, velocity, width, and height values. All of these values will be defined inside the constructor method.
 
 
-Create an empty constructor inside your `Player` class. 
+Create an empty constructor inside your `Player` class.
 
 
 # --hints--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6486282ca3a469fca6ebed27.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6486282ca3a469fca6ebed27.md
index be45408800b..a517be5aca0 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6486282ca3a469fca6ebed27.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6486282ca3a469fca6ebed27.md
@@ -189,7 +189,7 @@ class Player {
     this.width = 40;
     this.height = 40;
   }
-  
+
 --fcc-editable-region--
 
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a6b393a10a4357087b3f7.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a6b393a10a4357087b3f7.md
index 0bebce897d7..8c0000f51cd 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a6b393a10a4357087b3f7.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a6b393a10a4357087b3f7.md
@@ -189,7 +189,7 @@ class Player {
     this.width = 40;
     this.height = 40;
   }
-  
+
 --fcc-editable-region--
 
   draw() {
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a75a844f2ea3a0060d807.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a75a844f2ea3a0060d807.md
index 692a89757fc..59edd2974a4 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a75a844f2ea3a0060d807.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a75a844f2ea3a0060d807.md
@@ -7,7 +7,7 @@ dashedName: step-18
 
 # --description--
 
-Below your `ctx.fillStyle`, you need to create the player's shape by using the `fillRect()` method. 
+Below your `ctx.fillStyle`, you need to create the player's shape by using the `fillRect()` method.
 
 ```js
 fillRect(x, y, width, height)
@@ -194,7 +194,7 @@ class Player {
     this.width = 40;
     this.height = 40;
   }
-  
+
 --fcc-editable-region--
 
   draw() {
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a80aa4405823b3f81a47f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a80aa4405823b3f81a47f.md
index b9dc0c74aca..9e5fbc487db 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a80aa4405823b3f81a47f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a80aa4405823b3f81a47f.md
@@ -7,7 +7,7 @@ dashedName: step-19
 
 # --description--
 
-The next step is to create an `update()` method which will be responsible for updating the player's position and velocity as it moves throughout the game. 
+The next step is to create an `update()` method which will be responsible for updating the player's position and velocity as it moves throughout the game.
 
 Below your `draw()` method, create an empty `update()` method.
 
@@ -193,7 +193,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
 --fcc-editable-region--
 
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a845dccffd93c0d41ad4b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a845dccffd93c0d41ad4b.md
index 0faff623a11..bcdee639238 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a845dccffd93c0d41ad4b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a845dccffd93c0d41ad4b.md
@@ -186,11 +186,11 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
 --fcc-editable-region--
 
   update() {
-    
+
   }
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a88458b4e343fbdffbbc0.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a88458b4e343fbdffbbc0.md
index 766de6ebad6..1e4a4143139 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a88458b4e343fbdffbbc0.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/649a88458b4e343fbdffbbc0.md
@@ -9,7 +9,7 @@ dashedName: step-21
 
 When the player moves to the right, you will need to adjust its velocity.
 
-Use the addition assignment operator to add the velocity's `x` coordinate to the player's `x` position. 
+Use the addition assignment operator to add the velocity's `x` coordinate to the player's `x` position.
 
 Don't forget to include the `this` keyword for the velocity and position.
 
@@ -22,7 +22,7 @@ const player = new Player();
 assert.match(player.update.toString(), /this\.position\.x\s*/);
 ```
 
-You should use the addition assignment operator `+=` to add the velocity's `x` coordinate to the player's `x` position. 
+You should use the addition assignment operator `+=` to add the velocity's `x` coordinate to the player's `x` position.
 
 ```js
 const player = new Player();
@@ -195,12 +195,12 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
 --fcc-editable-region--
 
   update() {
     this.draw();
-    
+
   }
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1d39230e33585f3dd0dae.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1d39230e33585f3dd0dae.md
index 37f9e04f8a6..9cd967ab567 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1d39230e33585f3dd0dae.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1d39230e33585f3dd0dae.md
@@ -9,7 +9,7 @@ dashedName: step-22
 
 When the player jumps up, you will need to add the logic for adjusting its velocity.
 
-Use the addition assignment operator to add the velocity's `y` coordinate to the player's `y` position. 
+Use the addition assignment operator to add the velocity's `y` coordinate to the player's `y` position.
 
 Don't forget to include the `this` keyword for the velocity and position.
 
@@ -22,7 +22,7 @@ const player = new Player();
 assert.match(player.update.toString(), /this\.position\.y\s*/);
 ```
 
-You should use the addition assignment operator `+=` to add the velocity's `y` coordinate to the player's `y` position. 
+You should use the addition assignment operator `+=` to add the velocity's `y` coordinate to the player's `y` position.
 
 ```js
 const player = new Player();
@@ -195,7 +195,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
 --fcc-editable-region--
 
   update() {
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1d86b1294b2869cef1c18.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1d86b1294b2869cef1c18.md
index 538a244805d..9835c452935 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1d86b1294b2869cef1c18.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1d86b1294b2869cef1c18.md
@@ -7,11 +7,11 @@ dashedName: step-23
 
 # --description--
 
-Right now, when the player jumps up, it is possible for it to move past the height of the canvas. 
+Right now, when the player jumps up, it is possible for it to move past the height of the canvas.
 
 To fix that, you will need to add a condition to stop the player from falling past the height of the canvas.
 
-Create an empty `if` statement that checks if the sum of the player's `y` position, height, and `y` velocity is less than or equal to the height of the canvas. 
+Create an empty `if` statement that checks if the sum of the player's `y` position, height, and `y` velocity is less than or equal to the height of the canvas.
 
 # --hints--
 
@@ -195,7 +195,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
 --fcc-editable-region--
 
   update() {
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1e1b74d2e4e019acb70b8.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1e1b74d2e4e019acb70b8.md
index f948bd82536..41c4e61853e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1e1b74d2e4e019acb70b8.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1e1b74d2e4e019acb70b8.md
@@ -184,7 +184,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -193,7 +193,7 @@ class Player {
 --fcc-editable-region--
 
     if (this.position.y + this.height + this.velocity.y <= canvas.height) {
-    
+
     }
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1e54abad976028a8938f1.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1e54abad976028a8938f1.md
index 314b94a24b0..c2acdf72935 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1e54abad976028a8938f1.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1e54abad976028a8938f1.md
@@ -7,12 +7,12 @@ dashedName: step-25
 
 # --description--
 
-Inside the inner `if` statement, assign 0 to the player's `y` position. 
+Inside the inner `if` statement, assign 0 to the player's `y` position.
 
 
 # --hints--
 
-You should assign `0` to the player's `y` position. 
+You should assign `0` to the player's `y` position.
 
 
 ```js
@@ -186,7 +186,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -196,7 +196,7 @@ class Player {
 
     if (this.position.y + this.height + this.velocity.y <= canvas.height) {
       if (this.position.y < 0) {
-        
+
       }
     }
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1fdbf48e08b06e8b05870.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1fdbf48e08b06e8b05870.md
index 97f1a5eb256..e508d6e5706 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1fdbf48e08b06e8b05870.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a1fdbf48e08b06e8b05870.md
@@ -184,7 +184,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -195,9 +195,9 @@ class Player {
 
       if (this.position.y < 0) {
         this.position.y = 0;
-       
+
       }
-      
+
 --fcc-editable-region--
     }
   }
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2cadabc8538152c49a7eb.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2cadabc8538152c49a7eb.md
index 1542f12039c..1b8f6b651b4 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2cadabc8538152c49a7eb.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2cadabc8538152c49a7eb.md
@@ -184,7 +184,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -197,7 +197,7 @@ class Player {
         this.position.y = 0;
         this.velocity.y = gravity;
       }
-      
+
 
     }
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2ceb58fe10e15e0dc223f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2ceb58fe10e15e0dc223f.md
index a79f6e1f1e0..9da49c411c0 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2ceb58fe10e15e0dc223f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2ceb58fe10e15e0dc223f.md
@@ -199,7 +199,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2d19c5029ba166cb912e5.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2d19c5029ba166cb912e5.md
index 8a06a720bc6..9eda3acb931 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2d19c5029ba166cb912e5.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2d19c5029ba166cb912e5.md
@@ -9,7 +9,7 @@ dashedName: step-29
 
 The final condition you need to add inside the `Player` class is to ensure that the player stays within the boundaries of the canvas screen and doesn't move too far off to the left.
 
-Create an `if` statement, to check if the player's `x` position is less than the width. 
+Create an `if` statement, to check if the player's `x` position is less than the width.
 
 # --hints--
 
@@ -187,7 +187,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2d5f23518e71727cac0db.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2d5f23518e71727cac0db.md
index 374f2b22f54..59f5e533ca4 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2d5f23518e71727cac0db.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2d5f23518e71727cac0db.md
@@ -185,7 +185,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -203,7 +203,7 @@ class Player {
 
 --fcc-editable-region--
     if (this.position.x < this.width) {
-      
+
     }
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2d86799a58517c29f79a5.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2d86799a58517c29f79a5.md
index fd3ef6d92ce..b8f0e4e2c1d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2d86799a58517c29f79a5.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64a2d86799a58517c29f79a5.md
@@ -7,7 +7,7 @@ dashedName: step-31
 
 # --description--
 
-The next step is to use the `new` keyword to create a new instance of the `Player` object and assign it to a new `const` variable called `player`. 
+The next step is to use the `new` keyword to create a new instance of the `Player` object and assign it to a new `const` variable called `player`.
 
 
 # --hints--
@@ -196,7 +196,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64aaf2aff7f1fc7a550f40cb.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64aaf2aff7f1fc7a550f40cb.md
index ea11b9d4894..b4f3fa00d1a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64aaf2aff7f1fc7a550f40cb.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64aaf2aff7f1fc7a550f40cb.md
@@ -195,7 +195,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64aaf83d46b16a7b20a27051.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64aaf83d46b16a7b20a27051.md
index 609b02d665f..fcf3c262772 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64aaf83d46b16a7b20a27051.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64aaf83d46b16a7b20a27051.md
@@ -9,7 +9,7 @@ dashedName: step-33
 
 Inside your `startGame` function, you will need to display the `canvas` element and hide the `startScreen` container.
 
-Use `canvas.style.display` to change the display value to `block`. 
+Use `canvas.style.display` to change the display value to `block`.
 
 Below that, use `startScreen.style.display` to change the display value to `none`.
 
@@ -217,7 +217,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -244,7 +244,7 @@ const player = new Player();
 --fcc-editable-region--
 
 const startGame = () => {
-  
+
 }
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab0134716d0a7c8889f167.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab0134716d0a7c8889f167.md
index 38e8d18231f..741c055f1b1 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab0134716d0a7c8889f167.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab0134716d0a7c8889f167.md
@@ -186,7 +186,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab06a9cc033b7d4a8bad2a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab06a9cc033b7d4a8bad2a.md
index 0032fdc9e50..b06d1bf7612 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab06a9cc033b7d4a8bad2a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab06a9cc033b7d4a8bad2a.md
@@ -11,7 +11,7 @@ Now it's time to add the functionality for the start game button.
 
 Add an `addEventListener` to the `startBtn` and pass in a `click` event and a reference to the `startGame` function.
 
-Click on the start game button, and you should see a light blue square on the screen which represents the main player. 
+Click on the start game button, and you should see a light blue square on the screen which represents the main player.
 
 # --hints--
 
@@ -199,7 +199,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab143edad72b7e25b23f8a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab143edad72b7e25b23f8a.md
index 25071c402b2..6a71eaecb91 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab143edad72b7e25b23f8a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab143edad72b7e25b23f8a.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-Now that you can see the player on the screen, it is time to start adding the functionality for moving the player across the screen. 
+Now that you can see the player on the screen, it is time to start adding the functionality for moving the player across the screen.
 
 Create a new empty arrow function called `animate`.
 
@@ -187,7 +187,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab178206f3237eafcc0ef4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab178206f3237eafcc0ef4.md
index cc213707534..48be246c1e4 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab178206f3237eafcc0ef4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64ab178206f3237eafcc0ef4.md
@@ -7,7 +7,7 @@ dashedName: step-37
 
 # --description--
 
-The <dfn>requestAnimationFrame()</dfn> web API, takes in a callback and is used to update the animation on the screen. The `animate` function will be responsible for updating the player's position and continually drawing it on the canvas. 
+The <dfn>requestAnimationFrame()</dfn> web API, takes in a callback and is used to update the animation on the screen. The `animate` function will be responsible for updating the player's position and continually drawing it on the canvas.
 
 Inside the `animate` function, call the `requestAnimationFrame()` API and pass `animate` as the argument.
 
@@ -185,7 +185,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acebecb7484c8c6a760534.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acebecb7484c8c6a760534.md
index 6e5d3040d0f..c01f0cea830 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acebecb7484c8c6a760534.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acebecb7484c8c6a760534.md
@@ -7,7 +7,7 @@ dashedName: step-38
 
 # --description--
 
-As the player moves through the game, you will need to clear the canvas before rendering the next frame of the animation. 
+As the player moves through the game, you will need to clear the canvas before rendering the next frame of the animation.
 
 You can use the <dfn>clearRect()</dfn> Web API to accomplish this. It takes in an `x`, `y`, `width`, and `height` arguments.
 
@@ -25,7 +25,7 @@ You should pass in `0, 0, canvas.width, canvas.height` for the arguments of the
 
 ```js
 assert.match(code, /\s*ctx\s*\.\s*clearRect\s*\(\s*0\s*,\s*0\s*,\s*canvas\s*\.\s*width\s*,\s*canvas\s*\.\s*height\s*\)\s*;?/);
-``` 
+```
 
 # --seed--
 
@@ -193,7 +193,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64aced3e88b0a38cec824dea.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64aced3e88b0a38cec824dea.md
index 054a29cee78..6f540ffba9f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64aced3e88b0a38cec824dea.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64aced3e88b0a38cec824dea.md
@@ -185,7 +185,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acedb5f59c0c8d43e96aa4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acedb5f59c0c8d43e96aa4.md
index 150081ae86a..a4cec17821d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acedb5f59c0c8d43e96aa4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acedb5f59c0c8d43e96aa4.md
@@ -192,7 +192,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf1af380a708ded8761f0.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf1af380a708ded8761f0.md
index f3d73b40bc4..0008d72b607 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf1af380a708ded8761f0.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf1af380a708ded8761f0.md
@@ -221,7 +221,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
index 3cd50917920..4bd72562aa6 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
@@ -7,7 +7,7 @@ dashedName: step-42
 
 # --description--
 
-The next step is to add the logic for increasing or decreasing a player's velocity based on if they move to the left or right of the screen. 
+The next step is to add the logic for increasing or decreasing a player's velocity based on if they move to the left or right of the screen.
 
 Inside the `animate` function, create an `if` statement where the condition checks if the right key was pressed and the player's `x` position is less than 400.
 
@@ -185,7 +185,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c703f58330b3767399e486.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c703f58330b3767399e486.md
index 169d24dabf2..599eb400ff8 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c703f58330b3767399e486.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c703f58330b3767399e486.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Inside the `if` statement, assign the number `5` to the player's `x` velocity. 
+Inside the `if` statement, assign the number `5` to the player's `x` velocity.
 
 # --hints--
 
@@ -183,7 +183,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c705fd8969d677066792b8.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c705fd8969d677066792b8.md
index 0c69ebbdefb..1fde2b22720 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c705fd8969d677066792b8.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c705fd8969d677066792b8.md
@@ -7,9 +7,9 @@ dashedName: step-44
 
 # --description--
 
-Add an `else if` statement where the condition checks if the left key was pressed and the player's `x` position is greater than 100. 
+Add an `else if` statement where the condition checks if the left key was pressed and the player's `x` position is greater than 100.
 
-Inside the `else if` statement, assign the number -5 to the player's x velocity. 
+Inside the `else if` statement, assign the number -5 to the player's x velocity.
 
 # --hints--
 
@@ -197,7 +197,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c708fe06b0c3776f90faaf.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c708fe06b0c3776f90faaf.md
index 906b667e3d0..1ffe76212d0 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c708fe06b0c3776f90faaf.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c708fe06b0c3776f90faaf.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Add an `else` clause that assigns the number `0` to the player's `x` velocity. 
+Add an `else` clause that assigns the number `0` to the player's `x` velocity.
 
 # --hints--
 
@@ -197,7 +197,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c70d3bf7504978368da6ad.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c70d3bf7504978368da6ad.md
index d27191626c5..40e0ff550b2 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c70d3bf7504978368da6ad.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c70d3bf7504978368da6ad.md
@@ -7,9 +7,9 @@ dashedName: step-46
 
 # --description--
 
-The next step is to add the functionality that will be responsible for moving the player across the screen. 
+The next step is to add the functionality that will be responsible for moving the player across the screen.
 
-Create a new arrow function called `movePlayer` that has three parameters called `key`, `xVelocity`, `isPressed`. 
+Create a new arrow function called `movePlayer` that has three parameters called `key`, `xVelocity`, `isPressed`.
 
 # --hints--
 
@@ -198,7 +198,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c70f78dbf5667a307a7d90.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c70f78dbf5667a307a7d90.md
index 20be06cad29..fbf45229c8b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c70f78dbf5667a307a7d90.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c70f78dbf5667a307a7d90.md
@@ -198,7 +198,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c71235eba6c67adaa9a458.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c71235eba6c67adaa9a458.md
index 6638800332a..efb4f904360 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c71235eba6c67adaa9a458.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c71235eba6c67adaa9a458.md
@@ -9,17 +9,17 @@ dashedName: step-48
 
 Inside the `if` statement, set the player's `x` velocity to 0 and the player's `y` velocity to 0.
 
-Below that, add a `return` statement. 
+Below that, add a `return` statement.
 
 # --hints--
 
-You should set the player's `x` velocity to 0. 
+You should set the player's `x` velocity to 0.
 
 ```js
 assert.match(movePlayer.toString(), /player\.velocity\.x\s*=\s*0\s*;?/);
 ```
 
-You should set the player's `y` velocity to 0. 
+You should set the player's `y` velocity to 0.
 
 ```js
 assert.match(movePlayer.toString(), /player\.velocity\.y\s*=\s*0\s*;?/);
@@ -197,7 +197,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7135a9d35797b4bfb01b3.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7135a9d35797b4bfb01b3.md
index d75de2a9ac0..5a93da5f973 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7135a9d35797b4bfb01b3.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7135a9d35797b4bfb01b3.md
@@ -7,7 +7,7 @@ dashedName: step-49
 
 # --description--
 
-Below the `if` statement, create a `switch` statement with a value of `key`. 
+Below the `if` statement, create a `switch` statement with a value of `key`.
 
 # --hints--
 
@@ -195,7 +195,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c714ec1b844f7bc0723deb.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c714ec1b844f7bc0723deb.md
index e32a04e7055..c638afa6b92 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c714ec1b844f7bc0723deb.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c714ec1b844f7bc0723deb.md
@@ -9,7 +9,7 @@ dashedName: step-50
 
 The first case you will want to add is when the left arrow key is pressed.
 
-Inside the `switch` statement, add a new case called "ArrowLeft". 
+Inside the `switch` statement, add a new case called "ArrowLeft".
 
 # --hints--
 
@@ -185,7 +185,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c715769bab5f7c14f6cd7b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c715769bab5f7c14f6cd7b.md
index 3c58d2703c5..c16c37a9119 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c715769bab5f7c14f6cd7b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c715769bab5f7c14f6cd7b.md
@@ -7,7 +7,7 @@ dashedName: step-51
 
 # --description--
 
-Inside the `case` clause, assign `isPressed` to `keys.leftKey.pressed`. 
+Inside the `case` clause, assign `isPressed` to `keys.leftKey.pressed`.
 
 Below that, add an `if` statement that checks if `xVelocity` is equal to 0. If so, assign the `xVelocity` to `player.velocity.x`.
 
@@ -197,7 +197,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7168cba4a4f7c90c26277.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7168cba4a4f7c90c26277.md
index 9b47f300617..8b70856c84a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7168cba4a4f7c90c26277.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7168cba4a4f7c90c26277.md
@@ -7,7 +7,7 @@ dashedName: step-52
 
 # --description--
 
-Below your `if` statement, use the subtraction assignment operator to subtract the `xVelocity` from `player.velocity.x`. 
+Below your `if` statement, use the subtraction assignment operator to subtract the `xVelocity` from `player.velocity.x`.
 
 To close out this case, make sure to add a `break` statement.
 
@@ -191,7 +191,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -255,7 +255,7 @@ const movePlayer = (key, xVelocity, isPressed) => {
       if (xVelocity === 0) {
         player.velocity.x = xVelocity;
       }
-      
+
   }
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7173772c2497ce99b474c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7173772c2497ce99b474c.md
index 7674cb31220..4fc8800501d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7173772c2497ce99b474c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7173772c2497ce99b474c.md
@@ -7,9 +7,9 @@ dashedName: step-53
 
 # --description--
 
-The player can jump up by using the up arrow key or the spacebar. 
+The player can jump up by using the up arrow key or the spacebar.
 
-Add three new cases for "ArrowUp", " ", and "Spacebar". Remember that you can group cases together when they share the same operation. 
+Add three new cases for "ArrowUp", " ", and "Spacebar". Remember that you can group cases together when they share the same operation.
 
 Inside those cases, use the subtraction assignment operator to subtract 8 from `player.velocity.y`.
 
@@ -207,7 +207,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -273,7 +273,7 @@ const movePlayer = (key, xVelocity, isPressed) => {
       }
       player.velocity.x -= xVelocity;
       break;
-    
+
   }
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7202620a5e17d8a3c777d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7202620a5e17d8a3c777d.md
index dd848e2311a..70130de1347 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7202620a5e17d8a3c777d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7202620a5e17d8a3c777d.md
@@ -213,7 +213,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -284,7 +284,7 @@ const movePlayer = (key, xVelocity, isPressed) => {
     case "Spacebar":
       player.velocity.y -= 8;
       break;
-    
+
   }
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c72e52133d687e8e6a60f6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c72e52133d687e8e6a60f6.md
index c72d92d340d..e27db5c4318 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c72e52133d687e8e6a60f6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c72e52133d687e8e6a60f6.md
@@ -9,9 +9,9 @@ dashedName: step-55
 
 Now it is time to add the event listeners that will be responsible for calling the `movePlayer` function.
 
-Start by adding an `addEventListener` to the global `window` object. 
+Start by adding an `addEventListener` to the global `window` object.
 
-For the arguments, pass in the `keydown` event and an arrow function that uses the destructuring assignment to get the `key` property from the `event` object in the event listener parameter. 
+For the arguments, pass in the `keydown` event and an arrow function that uses the destructuring assignment to get the `key` property from the `event` object in the event listener parameter.
 
 # --hints--
 
@@ -200,7 +200,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c73367cce78a7fd65dd3be.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c73367cce78a7fd65dd3be.md
index 7eeb6cd349c..6d61f54e3b6 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c73367cce78a7fd65dd3be.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c73367cce78a7fd65dd3be.md
@@ -189,7 +189,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -279,7 +279,7 @@ startBtn.addEventListener("click", startGame);
 --fcc-editable-region--
 
 window.addEventListener("keydown", ({ key }) => {
-  
+
 });
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c734293def73808e609778.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c734293def73808e609778.md
index 6350087124d..d7598fde8d9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c734293def73808e609778.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c734293def73808e609778.md
@@ -7,7 +7,7 @@ dashedName: step-57
 
 # --description--
 
-Add another `addEventListener` to the global `window` object and pass in the `keyup` event and use destructuring to pass in the `key` property from the event. 
+Add another `addEventListener` to the global `window` object and pass in the `keyup` event and use destructuring to pass in the `key` property from the event.
 
 # --hints--
 
@@ -189,7 +189,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c736a531835181349c27d2.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c736a531835181349c27d2.md
index 3eeae1169bc..eaeeaf00e22 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c736a531835181349c27d2.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c736a531835181349c27d2.md
@@ -190,7 +190,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -284,7 +284,7 @@ window.addEventListener("keydown", ({ key }) => {
 --fcc-editable-region--
 
 window.addEventListener("keyup", ({ key }) => {
-  
+
 });
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c73981de025581bddb89eb.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c73981de025581bddb89eb.md
index 07b56eb1747..4fc4b477f75 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c73981de025581bddb89eb.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c73981de025581bddb89eb.md
@@ -195,7 +195,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c73df1424422832333a9fa.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c73df1424422832333a9fa.md
index f81d71f44d4..fe4ef487def 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c73df1424422832333a9fa.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c73df1424422832333a9fa.md
@@ -185,7 +185,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74a226587f502c0525927.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74a226587f502c0525927.md
index e902356d07c..6a2319095b7 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74a226587f502c0525927.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74a226587f502c0525927.md
@@ -183,7 +183,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74a8a4138c6032241d498.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74a8a4138c6032241d498.md
index 9fa16c52756..e8f32580595 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74a8a4138c6032241d498.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74a8a4138c6032241d498.md
@@ -189,7 +189,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74c293dd7cf03cbd58194.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74c293dd7cf03cbd58194.md
index efb551b97aa..cbef4344406 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74c293dd7cf03cbd58194.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74c293dd7cf03cbd58194.md
@@ -185,7 +185,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74e0064a9080443af0796.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74e0064a9080443af0796.md
index 973bd8f2a8e..e2a40e7de0b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74e0064a9080443af0796.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c74e0064a9080443af0796.md
@@ -186,7 +186,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c750c328e06f0878a9272e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c750c328e06f0878a9272e.md
index 6f3e6f3036c..b58b51ae302 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c750c328e06f0878a9272e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c750c328e06f0878a9272e.md
@@ -191,7 +191,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7527100b19b09037ce5db.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7527100b19b09037ce5db.md
index 79ded5e46a7..fb78953bc72 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7527100b19b09037ce5db.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7527100b19b09037ce5db.md
@@ -192,7 +192,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7538db3e33d09704ab148.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7538db3e33d09704ab148.md
index 193ed4198e1..f7360bfc4d9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7538db3e33d09704ab148.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7538db3e33d09704ab148.md
@@ -185,7 +185,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c754f598ca5409d0a08884.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c754f598ca5409d0a08884.md
index 30884f29481..930f5809767 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c754f598ca5409d0a08884.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c754f598ca5409d0a08884.md
@@ -7,7 +7,7 @@ dashedName: step-68
 
 # --description--
 
-Inside the `platformPositions`, you will need to add the list of positions for the platforms. 
+Inside the `platformPositions`, you will need to add the list of positions for the platforms.
 
 Add a new object that has an `x` property with a value of `500` and a `y` property with a value of `450`.
 
@@ -185,7 +185,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c755bf0034b20a428a4a1b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c755bf0034b20a428a4a1b.md
index 2a2acdbb3b2..42fe47de826 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c755bf0034b20a428a4a1b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c755bf0034b20a428a4a1b.md
@@ -184,7 +184,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -227,7 +227,7 @@ const player = new Player();
 
 const platformPositions = [
   { x: 500, y: 450 },
-  
+
 ];
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7561d44e2300a90a38ab6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7561d44e2300a90a38ab6.md
index e3e7894118c..871e35007f6 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7561d44e2300a90a38ab6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7561d44e2300a90a38ab6.md
@@ -212,7 +212,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7573fd2265f0b1c77e2ec.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7573fd2265f0b1c77e2ec.md
index 1ec3539fba6..eeb8bc378e4 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7573fd2265f0b1c77e2ec.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c7573fd2265f0b1c77e2ec.md
@@ -191,7 +191,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c758ab7352130b775df8c4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c758ab7352130b775df8c4.md
index 4e100a500e3..952978d5c8a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c758ab7352130b775df8c4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c758ab7352130b775df8c4.md
@@ -183,7 +183,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
index 2d898e44245..2bc5e567f4f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
@@ -9,7 +9,7 @@ dashedName: step-73
 
 Inside the `animate` function, you will need to draw each of the platforms onto the canvas.
 
-Add a `forEach` loop that iterates through the `platforms` array. 
+Add a `forEach` loop that iterates through the `platforms` array.
 
 Inside the callback function, add a `platform` parameter and for the body of the function call the `draw` method on each `platform`.
 
@@ -199,7 +199,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9bab6998128282da063f9.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9bab6998128282da063f9.md
index cdd5f70d105..211e045117d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9bab6998128282da063f9.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9bab6998128282da063f9.md
@@ -9,9 +9,9 @@ dashedName: step-74
 
 If you try to start the game, you will notice that the platforms are rendered on the screen. But as the player moves to the right, the platform does not move with it.
 
-To fix this issue, you will need to update the platform's `x` position as the player moves across the screen. 
+To fix this issue, you will need to update the platform's `x` position as the player moves across the screen.
 
-Inside the `animate` function, add a condition to check if the right key was pressed and if the `isCheckpointCollisionDetectionActive` is true. 
+Inside the `animate` function, add a condition to check if the right key was pressed and if the `isCheckpointCollisionDetectionActive` is true.
 
 # --hints--
 
@@ -187,7 +187,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9db021d4d912906878f3a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9db021d4d912906878f3a.md
index 61f1a8f5c87..be8a3ebba64 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9db021d4d912906878f3a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9db021d4d912906878f3a.md
@@ -7,7 +7,7 @@ dashedName: step-75
 
 # --description--
 
-Inside your condition, add a `forEach` loop to iterate through the `platforms` array. 
+Inside your condition, add a `forEach` loop to iterate through the `platforms` array.
 
 Inside the loop, use the subtraction assignment operator to subtract 5 from the platform's `x` position.
 
@@ -191,7 +191,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
index d8771c803c1..79eda0fba07 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
@@ -195,7 +195,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
index 3d3c63b777c..4183273e53c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
@@ -7,7 +7,7 @@ dashedName: step-78
 
 # --description--
 
-Inside the callback function, create a new `const` variable called `collisionDetectionRules` and assign it an empty array. 
+Inside the callback function, create a new `const` variable called `collisionDetectionRules` and assign it an empty array.
 
 Inside that array, add a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
@@ -191,7 +191,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -280,7 +280,7 @@ const animate = () => {
   --fcc-editable-region--
 
   platforms.forEach((platform) => {
-    
+
   });
 
   --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9efea385ca536bf467a7c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9efea385ca536bf467a7c.md
index 918e63bc77e..fc6ac980996 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9efea385ca536bf467a7c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9efea385ca536bf467a7c.md
@@ -184,7 +184,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -275,7 +275,7 @@ const animate = () => {
   platforms.forEach((platform) => {
     const collisionDetectionRules = [
       player.position.y + player.height <= platform.position.y,
-  
+
     ];
   });
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9fa51209ab5395d524cce.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9fa51209ab5395d524cce.md
index 4449aca752e..99c0828bb58 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9fa51209ab5395d524cce.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9fa51209ab5395d524cce.md
@@ -183,7 +183,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9fe7b2ffa3539fbf82d32.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9fe7b2ffa3539fbf82d32.md
index dadf839de74..e855837d53b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9fe7b2ffa3539fbf82d32.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9fe7b2ffa3539fbf82d32.md
@@ -183,7 +183,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cab4d06512c95234256cbb.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cab4d06512c95234256cbb.md
index bfda1844970..5ea8e18be2b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cab4d06512c95234256cbb.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cab4d06512c95234256cbb.md
@@ -9,7 +9,7 @@ dashedName: step-82
 
 Next, add an `if` statement that checks if every rule in the `collisionDetectionRules` array is `true`. Make sure to use the `every` method for this.
 
-Inside the body of the `if` statement, assign the number 0 to the player's `y` velocity followed by a `return` statement. 
+Inside the body of the `if` statement, assign the number 0 to the player's `y` velocity followed by a `return` statement.
 
 # --hints--
 
@@ -191,7 +191,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caea41a4199e54253c60ca.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caea41a4199e54253c60ca.md
index 91f0d3a74d5..7a67576ffa7 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caea41a4199e54253c60ca.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caea41a4199e54253c60ca.md
@@ -183,7 +183,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf237baef43587be6d860.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf237baef43587be6d860.md
index 66c53e87c01..3ea22dd84e5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf237baef43587be6d860.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf237baef43587be6d860.md
@@ -11,7 +11,7 @@ Add an `if` statement that checks if every platform detection rule is `true`. Ma
 
 # --hints--
 
-You should have an `if` statement that uses the `every` method to check if every platform detection rule is `true`. 
+You should have an `if` statement that uses the `every` method to check if every platform detection rule is `true`.
 
 ```js
 assert.match(code, /\s*if\s*\(\s*platformDetectionRules\.every\(\s*(?:\(\s*(.+)\s*\)\s*=>\s*\1|([^\s()]+)\s*=>\s*\2)\s*\)\s*\)\s*{\s*}\s*;?/);
@@ -183,7 +183,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb24c224ac2c61fa1c70aa.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb24c224ac2c61fa1c70aa.md
index 30056688b8a..afbdc50e5a5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb24c224ac2c61fa1c70aa.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb24c224ac2c61fa1c70aa.md
@@ -7,7 +7,7 @@ dashedName: step-88
 
 # --description--
 
-Inside the body of the `if` statement, assign `platform.position.y + player.height` to the player's `y` position. 
+Inside the body of the `if` statement, assign `platform.position.y + player.height` to the player's `y` position.
 
 Then, assign `gravity` to the player's `y` velocity.
 
@@ -15,7 +15,7 @@ Now, when you start the game, you will be able to jump underneath the platform a
 
 # --hints--
 
-You should assign the sum of the platform's `y` position and the player's height to the player's `y` position. 
+You should assign the sum of the platform's `y` position and the player's height to the player's `y` position.
 
 ```js
 assert.match(code, /\s*player\.position\.y\s*=\s*platform\.position\.y\s*\+\s*player\.height\s*;?/);
@@ -193,7 +193,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb262dd91ecc62998736af.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb262dd91ecc62998736af.md
index e2548afe84c..18f8ff7d6d9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb262dd91ecc62998736af.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb262dd91ecc62998736af.md
@@ -185,7 +185,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb26e84dd0b56313ba0c6e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb26e84dd0b56313ba0c6e.md
index c585adac684..7b3ddef9804 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb26e84dd0b56313ba0c6e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb26e84dd0b56313ba0c6e.md
@@ -7,7 +7,7 @@ dashedName: step-90
 
 # --description--
 
-Inside that `CheckPoint` class, add a constructor with `x` and `y` parameters. 
+Inside that `CheckPoint` class, add a constructor with `x` and `y` parameters.
 
 
 # --hints--
@@ -190,7 +190,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2a87057eb5655c66d1c2.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2a87057eb5655c66d1c2.md
index 7ce9ce8f4de..7bcef249826 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2a87057eb5655c66d1c2.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2a87057eb5655c66d1c2.md
@@ -7,7 +7,7 @@ dashedName: step-91
 
 # --description--
 
-Inside the constructor, create an object with `x` and `y` parameters and assign it to the `position`. 
+Inside the constructor, create an object with `x` and `y` parameters and assign it to the `position`.
 
 Remember to use the `this` keyword to access the properties.
 
@@ -194,7 +194,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -235,7 +235,7 @@ class Platform {
 
 class CheckPoint {
   constructor(x, y) {
-    
+
   };
 };
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2da32f8443669fd4e725.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2da32f8443669fd4e725.md
index ff71e7267f6..6ee87a986ef 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2da32f8443669fd4e725.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2da32f8443669fd4e725.md
@@ -7,7 +7,7 @@ dashedName: step-92
 
 # --description--
 
-The next step is to add the `width` and `height` to the `CheckPoint` class. 
+The next step is to add the `width` and `height` to the `CheckPoint` class.
 
 The `width` and `height` should be 40 and 70 respectively.
 
@@ -207,7 +207,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
index 60210964063..55173875215 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
@@ -7,9 +7,9 @@ dashedName: step-93
 
 # --description--
 
-Now you need to create a `draw` method for the `CheckPoint` class. 
+Now you need to create a `draw` method for the `CheckPoint` class.
 
-Inside the `draw` method, add a `fillStyle` property to the `ctx` object and set it to `#f1be32`. 
+Inside the `draw` method, add a `fillStyle` property to the `ctx` object and set it to `#f1be32`.
 
 Below the `fillStyle` property, use the `fillRect` method on the `ctx` object and pass in the `x`, `y`, `width`, and `height` properties as arguments.
 
@@ -202,7 +202,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2ff0c31b0f67a6d76a47.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2ff0c31b0f67a6d76a47.md
index 7b03e2eac6e..9d5f6830f28 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2ff0c31b0f67a6d76a47.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2ff0c31b0f67a6d76a47.md
@@ -205,7 +205,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb30b8e4719a67fe14f364.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb30b8e4719a67fe14f364.md
index 918f1906492..1a09fb4ed71 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb30b8e4719a67fe14f364.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb30b8e4719a67fe14f364.md
@@ -7,7 +7,7 @@ dashedName: step-95
 
 # --description--
 
-Use `const` to create a new array called `checkpointPositions`. 
+Use `const` to create a new array called `checkpointPositions`.
 
 Inside that array, add an object for each of the following positions:
 
@@ -215,7 +215,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
index 30edcda4137..ecedd30bbea 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
@@ -7,7 +7,7 @@ dashedName: step-96
 
 # --description--
 
-The next step is to create a list of new `checkpoint` instances using the `CheckPoint` class. 
+The next step is to create a list of new `checkpoint` instances using the `CheckPoint` class.
 
 Start by creating a new `const` variable called `checkpoints` and assign it `checkpointPositions.map()`.
 
@@ -201,7 +201,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
index 22c9514326c..35533919bb2 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
@@ -199,7 +199,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
index dcb1842886f..12050701935 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
@@ -199,7 +199,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb480723790d6d727b8ef5.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb480723790d6d727b8ef5.md
index 1e17a9f7d13..170fa8120b1 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb480723790d6d727b8ef5.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb480723790d6d727b8ef5.md
@@ -199,7 +199,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -320,7 +320,7 @@ const animate = () => {
       checkpoints.forEach((checkpoint) => {
         checkpoint.position.x -= 5;
       });
-    
+
     } else if (keys.leftKey.pressed && isCheckpointCollisionDetectionActive) {
       platforms.forEach((platform) => {
         platform.position.x += 5;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb48e36c9ad56dd7a523f4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb48e36c9ad56dd7a523f4.md
index cc4497ec80b..df364f0ea8d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb48e36c9ad56dd7a523f4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb48e36c9ad56dd7a523f4.md
@@ -191,7 +191,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -312,7 +312,7 @@ const animate = () => {
       checkpoints.forEach((checkpoint) => {
         checkpoint.position.x -= 5;
       });
-    
+
     } else if (keys.leftKey.pressed && isCheckpointCollisionDetectionActive) {
       platforms.forEach((platform) => {
         platform.position.x += 5;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4978631a4f6e3e1b964d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4978631a4f6e3e1b964d.md
index 6f94fbc9e64..8a7964ea682 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4978631a4f6e3e1b964d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4978631a4f6e3e1b964d.md
@@ -183,7 +183,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -301,7 +301,7 @@ const animate = () => {
       checkpoints.forEach((checkpoint) => {
         checkpoint.position.x -= 5;
       });
-    
+
     } else if (keys.leftKey.pressed && isCheckpointCollisionDetectionActive) {
       platforms.forEach((platform) => {
         platform.position.x += 5;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4e676c156f7332f40db7.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4e676c156f7332f40db7.md
index a66846b3cff..bd6fca9a403 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4e676c156f7332f40db7.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4e676c156f7332f40db7.md
@@ -183,7 +183,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -301,7 +301,7 @@ const animate = () => {
       checkpoints.forEach((checkpoint) => {
         checkpoint.position.x -= 5;
       });
-    
+
     } else if (keys.leftKey.pressed && isCheckpointCollisionDetectionActive) {
       platforms.forEach((platform) => {
         platform.position.x += 5;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
index e45c635bd43..a59debae637 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
@@ -7,7 +7,7 @@ dashedName: step-104
 
 # --description--
 
-The last few steps involve updating the `animate` function to display the checkpoint screen when the player reaches a checkpoint. 
+The last few steps involve updating the `animate` function to display the checkpoint screen when the player reaches a checkpoint.
 
 Start by adding a `forEach` to the `checkpoints` array. For the callback function, use `checkpoint`, and `index` for the parameters.
 
@@ -193,7 +193,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -311,7 +311,7 @@ const animate = () => {
       checkpoints.forEach((checkpoint) => {
         checkpoint.position.x -= 5;
       });
-    
+
     } else if (keys.leftKey.pressed && isCheckpointCollisionDetectionActive) {
       platforms.forEach((platform) => {
         platform.position.x += 5;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb522509ffb274daf9fd9e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb522509ffb274daf9fd9e.md
index c80429825c9..d16ccda58d5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb522509ffb274daf9fd9e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb522509ffb274daf9fd9e.md
@@ -7,7 +7,7 @@ dashedName: step-105
 
 # --description--
 
-Create a new `const` variable called `checkpointDetectionRules` and assign it an empty array. 
+Create a new `const` variable called `checkpointDetectionRules` and assign it an empty array.
 
 Inside that array, add a boolean expression that checks if the player's `position.x` is greater than or equal to the checkpoint's `position.x`.
 
@@ -191,7 +191,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -309,7 +309,7 @@ const animate = () => {
       checkpoints.forEach((checkpoint) => {
         checkpoint.position.x -= 5;
       });
-    
+
     } else if (keys.leftKey.pressed && isCheckpointCollisionDetectionActive) {
       platforms.forEach((platform) => {
         platform.position.x += 5;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb583dadb33a77595797bd.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb583dadb33a77595797bd.md
index 3b033468fc3..c093abf2ac1 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb583dadb33a77595797bd.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb583dadb33a77595797bd.md
@@ -202,7 +202,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -320,7 +320,7 @@ const animate = () => {
       checkpoints.forEach((checkpoint) => {
         checkpoint.position.x -= 5;
       });
-    
+
     } else if (keys.leftKey.pressed && isCheckpointCollisionDetectionActive) {
       platforms.forEach((platform) => {
         platform.position.x += 5;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb5d1d48532b79b4e7ef6c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb5d1d48532b79b4e7ef6c.md
index c33801a0e4e..a8833ffbb1c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb5d1d48532b79b4e7ef6c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb5d1d48532b79b4e7ef6c.md
@@ -7,7 +7,7 @@ dashedName: step-107
 
 # --description--
 
-Next, add an `if` statement that checks if every rule in the `checkpointDetectionRules` array is true. 
+Next, add an `if` statement that checks if every rule in the `checkpointDetectionRules` array is true.
 
 Make sure to use the `every` method for this.
 
@@ -185,7 +185,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -303,7 +303,7 @@ const animate = () => {
       checkpoints.forEach((checkpoint) => {
         checkpoint.position.x -= 5;
       });
-    
+
     } else if (keys.leftKey.pressed && isCheckpointCollisionDetectionActive) {
       platforms.forEach((platform) => {
         platform.position.x += 5;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
index c0b13dba11f..f7bbbb1edad 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
@@ -183,7 +183,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -301,7 +301,7 @@ const animate = () => {
       checkpoints.forEach((checkpoint) => {
         checkpoint.position.x -= 5;
       });
-    
+
     } else if (keys.leftKey.pressed && isCheckpointCollisionDetectionActive) {
       platforms.forEach((platform) => {
         platform.position.x += 5;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650755908a8071409ab9e09e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650755908a8071409ab9e09e.md
index df59f627fc6..f21e554535e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650755908a8071409ab9e09e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650755908a8071409ab9e09e.md
@@ -7,7 +7,7 @@ dashedName: step-109
 
 # --description--
 
-The next step is to write a condition that checks if the player has reached the last checkpoint. 
+The next step is to write a condition that checks if the player has reached the last checkpoint.
 
 Start by adding an `if` statement that checks if the `index` is equal to the length of the `checkpoints` array minus one.
 
@@ -185,7 +185,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -303,7 +303,7 @@ const animate = () => {
       checkpoints.forEach((checkpoint) => {
         checkpoint.position.x -= 5;
       });
-    
+
     } else if (keys.leftKey.pressed && isCheckpointCollisionDetectionActive) {
       platforms.forEach((platform) => {
         platform.position.x += 5;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
index a842262a1db..93460e80702 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
@@ -199,7 +199,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -317,7 +317,7 @@ const animate = () => {
       checkpoints.forEach((checkpoint) => {
         checkpoint.position.x -= 5;
       });
-    
+
     } else if (keys.leftKey.pressed && isCheckpointCollisionDetectionActive) {
       platforms.forEach((platform) => {
         platform.position.x += 5;
@@ -372,7 +372,7 @@ const animate = () => {
 --fcc-editable-region--
 
       if (index === checkpoints.length - 1) {
-        
+
       };
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650757918a9e97418dc3d71a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650757918a9e97418dc3d71a.md
index 379e5962ffa..7758905840a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650757918a9e97418dc3d71a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650757918a9e97418dc3d71a.md
@@ -195,7 +195,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -313,7 +313,7 @@ const animate = () => {
       checkpoints.forEach((checkpoint) => {
         checkpoint.position.x -= 5;
       });
-    
+
     } else if (keys.leftKey.pressed && isCheckpointCollisionDetectionActive) {
       platforms.forEach((platform) => {
         platform.position.x += 5;
@@ -611,7 +611,7 @@ class Player {
     ctx.fillStyle = "#99c9ff";
     ctx.fillRect(this.position.x, this.position.y, this.width, this.height);
   }
-  
+
   update() {
     this.draw();
     this.position.x += this.velocity.x;
@@ -729,7 +729,7 @@ const animate = () => {
       checkpoints.forEach((checkpoint) => {
         checkpoint.position.x -= 5;
       });
-    
+
     } else if (keys.leftKey.pressed && isCheckpointCollisionDetectionActive) {
       platforms.forEach((platform) => {
         platform.position.x += 5;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e78a7ea4a168de4e6a38.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e78a7ea4a168de4e6a38.md
index fabbdb0af8b..fd7525c4db9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e78a7ea4a168de4e6a38.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e78a7ea4a168de4e6a38.md
@@ -37,7 +37,7 @@ Your event listener should listen for a `click` event.
 assert.match(code, /openTaskFormBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener's callback function should contain `taskForm.classList.toggle("hidden")`. 
+Your event listener's callback function should contain `taskForm.classList.toggle("hidden")`.
 
 ```js
 assert.match(code, /openTaskFormBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*(?:{\s*taskForm\s*\.classList\s*\.\s*toggle\s*\(\s*('|"|`)hidden\2\s*\)\s*;?\s*}|\s*taskForm\s*\.classList\s*\.\s*toggle\s*\(\s*('|"|`)hidden\3\s*\)\s*;?\s*)\s*\)\s*;?/)
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
index f6cef27740a..a26fb7d161b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
@@ -11,7 +11,7 @@ You will need to determine whether the task being added to the `taskData` array
 
 The `findIndex()` array method finds and returns the index of the first element in an array that meets the criteria specified by a provided testing function. If no such element is found, the method returns `-1`.
 
-Here's an example:
+여기 예시가 있습니다.
 
 ```js
 const numbers = [3, 1, 5, 6];
@@ -20,7 +20,7 @@ const firstNumLargerThanThree = numbers.findIndex((num) => num > 3);
 console.log(firstNumLargerThanThree); // prints index 2
 ```
 
-Use `const` to declare a variable called `dataArrIndex` and assign it the value of `taskData.findIndex()`. For the `findIndex()` method, pass in an arrow function with `item` as the parameter. 
+Use `const` to declare a variable called `dataArrIndex` and assign it the value of `taskData.findIndex()`. For the `findIndex()` method, pass in an arrow function with `item` as the parameter.
 
 Within the arrow function, check if the `id` property of `item` is strictly equal to the `id` property of `currentTask`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
index 076cc769e2f..217e6547857 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
@@ -334,7 +334,7 @@ taskForm.addEventListener("submit", (e) => {
 
   const dataArrIndex = taskData.findIndex((item) => item.id === currentTask.id);
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
 });
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec89ee549ecf802de2b3e2.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec89ee549ecf802de2b3e2.md
index 060fb00a7da..356be765b29 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec89ee549ecf802de2b3e2.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec89ee549ecf802de2b3e2.md
@@ -320,7 +320,7 @@ taskForm.addEventListener("submit", (e) => {
   const taskObj = {
     id: `${titleInput.value.toLowerCase().split(" ").join("-")}-${Date.now()}`,
     --fcc-editable-region--
-    
+
     --fcc-editable-region--
   };
 });
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
index 5b2424afe2b..b998804835e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
@@ -326,7 +326,7 @@ taskForm.addEventListener("submit", (e) => {
   };
 
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
 });
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9145e424d8835a4e0f28.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9145e424d8835a4e0f28.md
index 10bc08fad33..70e61f609b9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9145e424d8835a4e0f28.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9145e424d8835a4e0f28.md
@@ -325,7 +325,7 @@ taskForm.addEventListener("submit", (e) => {
   }
 
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
 });
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9343769e8f85c1e17e05.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9343769e8f85c1e17e05.md
index ae10396eb9f..cc791899375 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9343769e8f85c1e17e05.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9343769e8f85c1e17e05.md
@@ -325,7 +325,7 @@ taskForm.addEventListener("submit", (e) => {
   taskData.forEach(({id, title, date, description}) => {
       (tasksContainer.innerHTML += `
       --fcc-editable-region--
-          
+
       --fcc-editable-region--
       `)
     }
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec94f0de20c086e09b0fc3.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec94f0de20c086e09b0fc3.md
index e2197b64f84..f79fe1ac928 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec94f0de20c086e09b0fc3.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec94f0de20c086e09b0fc3.md
@@ -339,7 +339,7 @@ taskForm.addEventListener("submit", (e) => {
       (tasksContainer.innerHTML += `
         <div class="task" id="${id}">
     --fcc-editable-region--
-        
+
     --fcc-editable-region--
         </div>
       `)
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec959a76336c8767f5cd4d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec959a76336c8767f5cd4d.md
index 1ed03870856..e9cca076298 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec959a76336c8767f5cd4d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec959a76336c8767f5cd4d.md
@@ -327,7 +327,7 @@ taskForm.addEventListener("submit", (e) => {
         <div class="task" id="${id}">
           <p><strong>Title:</strong> ${title}</p>
           --fcc-editable-region--
-          
+
           --fcc-editable-region--
         </div>
       `)
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec96761156a187ed32b274.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec96761156a187ed32b274.md
index dc2e958a2ab..d7d635454eb 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec96761156a187ed32b274.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec96761156a187ed32b274.md
@@ -331,7 +331,7 @@ taskForm.addEventListener("submit", (e) => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           --fcc-editable-region--
-          
+
           --fcc-editable-region--
         </div>
       `)
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
index 4b5a75ed157..6af664aa2fc 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
@@ -313,7 +313,7 @@ let currentTask = {};
 
 --fcc-editable-region--
 const reset = () => {
-  
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
index 13c9b92abcf..6b6368a8439 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
@@ -302,7 +302,7 @@ openTaskFormBtn.addEventListener("click", () =>
 --fcc-editable-region--
 closeTaskFormBtn.addEventListener("click", () => {
   confirmCloseDialog.showModal();
-  
+
 });
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
index 8219f4b00c2..9608d26d428 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
@@ -297,7 +297,7 @@ const addOrUpdateTask = () => {
   if (dataArrIndex === -1) {
     taskData.unshift(taskObj);
   }
-  
+
   updateTaskContainer()
   reset()
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf0418e828c0114a558a7.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf0418e828c0114a558a7.md
index 3b1c27d7d37..9800e032534 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf0418e828c0114a558a7.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf0418e828c0114a558a7.md
@@ -300,7 +300,7 @@ const addOrUpdateTask = () => {
   if (dataArrIndex === -1) {
     taskData.unshift(taskObj);
   }
-  
+
   updateTaskContainer()
   reset()
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
index 7e4e107e94b..f9941dc1186 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
@@ -9,7 +9,7 @@ dashedName: step-38
 
 You need to remove the task from the DOM using `remove()` and from the `taskData` array using `splice()`.
 
-`splice()` is an array method that modifies arrays by removing, replacing, or adding elements at a specified index, while also returning the removed elements. It can take up to three arguments: the first one is the mandatory index at which to start, the second is the number of items to remove, and the third is an optional replacement element. Here's an example:
+`splice()` is an array method that modifies arrays by removing, replacing, or adding elements at a specified index, while also returning the removed elements. It can take up to three arguments: the first one is the mandatory index at which to start, the second is the number of items to remove, and the third is an optional replacement element. 여기 예시가 있습니다.
 
 ```js
 const fruits = ["mango", "date", "cherry", "banana", "apple"];
@@ -359,7 +359,7 @@ const deleteTask = (buttonEl) => {
   const dataArrIndex = taskData.findIndex(
     (item) => item.id === buttonEl.parentElement.id
   );
-  
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
index f889eb34824..6bb3020b119 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
@@ -333,7 +333,7 @@ const deleteTask = (buttonEl) => {
 --fcc-editable-region--
 const editTask = (buttonEl) => {
   const dataArrIndex = taskData.findIndex((item) => item.id === buttonEl.parentElement.id);
-  
+
 
 }
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1321e189a6136d200f77.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1321e189a6136d200f77.md
index 6fa86a54891..ae05b4d0679 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1321e189a6136d200f77.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1321e189a6136d200f77.md
@@ -349,7 +349,7 @@ const editTask = (buttonEl) => {
   );
 
   currentTask = taskData[dataArrIndex];
-  
+
 
 }
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1436adef3e145b4c3501.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1436adef3e145b4c3501.md
index accd732aa49..c137f557118 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1436adef3e145b4c3501.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1436adef3e145b4c3501.md
@@ -341,7 +341,7 @@ const editTask = (buttonEl) => {
   titleInput.value = currentTask.title;
   dateInput.value = currentTask.date;
   descriptionInput.value = currentTask.description;
-  
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb14d890415c14f93069ce.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb14d890415c14f93069ce.md
index 41d448f851d..66579ac2fde 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb14d890415c14f93069ce.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb14d890415c14f93069ce.md
@@ -343,8 +343,8 @@ const editTask = (buttonEl) => {
   descriptionInput.value = currentTask.description;
 
   addOrUpdateTaskBtn.innerText = "Update Task";
-  
-  
+
+
 }
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
index b2077418764..66376b9472b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
@@ -732,7 +732,7 @@ const editTask = (buttonEl) => {
   descriptionInput.value = currentTask.description;
 
   addOrUpdateTaskBtn.innerText = "Update Task";
-  
+
 
   taskForm.classList.toggle("hidden");  
 }
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65099dbd8f137d58e5c0ff16.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65099dbd8f137d58e5c0ff16.md
index c82ee8d37e2..606a2f3c5c9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65099dbd8f137d58e5c0ff16.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65099dbd8f137d58e5c0ff16.md
@@ -328,7 +328,7 @@ taskForm.addEventListener("submit", (e) => {
             <p><strong>Title:</strong> ${title}</p>
             <p><strong>Date:</strong> ${date}</p>
     --fcc-editable-region--
-            
+
     --fcc-editable-region--
           </div>
         `)
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/659ebe52d74b132a1d75c891.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/659ebe52d74b132a1d75c891.md
index d522cf2c5ab..a0ad7091f21 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/659ebe52d74b132a1d75c891.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/659ebe52d74b132a1d75c891.md
@@ -288,7 +288,7 @@ let currentTask = {};
 
 const addOrUpdateTask = () => {
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
   const dataArrIndex = taskData.findIndex((item) => item.id === currentTask.id);
   const taskObj = {
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63c620161fc2b49ac340ffc4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63c620161fc2b49ac340ffc4.md
index 7a9165f82ce..46b4f675589 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63c620161fc2b49ac340ffc4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63c620161fc2b49ac340ffc4.md
@@ -9,9 +9,9 @@ dashedName: step-1
 
 In this project, you will build a set of football team cards and learn about nested objects, object destructuring, default parameters, event listeners, and switch statements. All of the HTML and CSS for this project has been provided for you.
 
-Start by accessing the `id` called `team` from the HTML document and storing it in a `const` variable called `teamName`. 
+Start by accessing the `id` called `team` from the HTML document and storing it in a `const` variable called `teamName`.
 
-Remember, you can use the `getElementById` method for this. 
+Remember, you can use the `getElementById` method for this.
 
 # --hints--
 
@@ -21,7 +21,7 @@ You should use the `document.getElementById()` method to get the `#team` element
 assert.match(code, /document\.getElementById\(\s*('|"|`)team\1\s*\)/);
 ```
 
-You should use `const` to declare the variable called `teamName` and assign it the `#team` element. 
+You should use `const` to declare the variable called `teamName` and assign it the `#team` element.
 
 ```js
 assert.match(code, /const\s+teamName\s*=\s*document\.getElementById\(\s*('|"|`)team\1\s*\)/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf7e324c1831f8d936b3ae.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf7e324c1831f8d936b3ae.md
index 43edc991e34..513b3c3ed99 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf7e324c1831f8d936b3ae.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf7e324c1831f8d936b3ae.md
@@ -17,7 +17,7 @@ You should use the `document.getElementById()` method to get the `#sport` elemen
 assert.match(code, /document\.getElementById\(\s*('|"|`)sport\1\s*\)/);
 ```
 
-You should use `const` to declare the variable called `typeOfSport` and assign it the `#sport` element. 
+You should use `const` to declare the variable called `typeOfSport` and assign it the `#sport` element.
 
 ```js
 assert.match(code, /const\s+typeOfSport\s*=\s*document\.getElementById\(\s*('|"|`)sport\1\s*\)/);
@@ -29,7 +29,7 @@ You should use the `document.getElementById()` method to get the `#year` element
 assert.match(code, /document\.getElementById\(\s*('|"|`)year\1\s*\)/);
 ```
 
-You should use `const` to declare the variable called `worldCupYear` and assign it the `#year` element. 
+You should use `const` to declare the variable called `worldCupYear` and assign it the `#year` element.
 
 ```js
 assert.match(code, /const\s+worldCupYear\s*=\s*document\.getElementById\(\s*('|"|`)year\1\s*\)/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf7f97e7f99af9348f5068.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf7f97e7f99af9348f5068.md
index b8ebcca66a2..080e5e186a1 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf7f97e7f99af9348f5068.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf7f97e7f99af9348f5068.md
@@ -17,7 +17,7 @@ You should use the `document.getElementById()` method to get the `#head-coach` e
 assert.match(code, /document\.getElementById\(\s*('|"|`)head-coach\1\s*\)/);
 ```
 
-You should use `const` to declare the variable called `headCoach` and assign it the `#head-coach` element. 
+You should use `const` to declare the variable called `headCoach` and assign it the `#head-coach` element.
 
 ```js
 assert.match(code, /const\s+headCoach\s*=\s*document\.getElementById\(\s*('|"|`)head-coach\1\s*\)/);
@@ -29,7 +29,7 @@ You should use the `document.getElementById()` method to get the `#player-cards`
 assert.match(code, /document\.getElementById\(\s*('|"|`)player-cards\1\s*\)/);
 ```
 
-You should use `const` to declare the variable called `playerCards` and assign it the `#player-cards` element. 
+You should use `const` to declare the variable called `playerCards` and assign it the `#player-cards` element.
 
 ```js
 assert.match(code, /const\s+playerCards\s*=\s*document\.getElementById\(\s*('|"|`)player-cards\1\s*\)/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf812bb8ecd4f9cf749b8f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf812bb8ecd4f9cf749b8f.md
index 073d7914516..6afeaf034bf 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf812bb8ecd4f9cf749b8f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf812bb8ecd4f9cf749b8f.md
@@ -17,7 +17,7 @@ You should use the `document.getElementById()` method to get the `#players` elem
 assert.match(code, /document\.getElementById\(\s*('|"|`)players\1\s*\)/);
 ```
 
-You should use `const` to declare the variable called `playersDropdownList` and assign it the `#players` element. 
+You should use `const` to declare the variable called `playersDropdownList` and assign it the `#players` element.
 
 ```js
 assert.match(code, /const\s+playersDropdownList\s*=\s*document\.getElementById\(\s*('|"|`)players\1\s*\)/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf83fdbb51d9fa54654ae6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf83fdbb51d9fa54654ae6.md
index bfcdcffd85b..e306a5ea676 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf83fdbb51d9fa54654ae6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf83fdbb51d9fa54654ae6.md
@@ -7,13 +7,13 @@ dashedName: step-5
 
 # --description--
 
-Now it is time to build out the data structure that will hold all of the information for your football team. 
+Now it is time to build out the data structure that will hold all of the information for your football team.
 
 Below the variables you just created, create a new `const` variable called `myFavoriteFootballTeam` and assign it an empty object.
 
 # --hints--
 
-You should use `const` to declare the variable called `myFavoriteFootballTeam` and assign it an empty object. 
+You should use `const` to declare the variable called `myFavoriteFootballTeam` and assign it an empty object.
 
 ```js
 assert.match(code, /const\s+myFavoriteFootballTeam\s*=\s*{\s*}\s*/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf8ec006a776ff5f6e3c68.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf8ec006a776ff5f6e3c68.md
index aaf7307c0a6..815176b6cff 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf8ec006a776ff5f6e3c68.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf8ec006a776ff5f6e3c68.md
@@ -7,7 +7,7 @@ dashedName: step-6
 
 # --description--
 
-Inside the `myFavoriteFootballTeam` object, add a new property with a key named `team` and a string value of `Argentina`. 
+Inside the `myFavoriteFootballTeam` object, add a new property with a key named `team` and a string value of `Argentina`.
 
 
 # --hints--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf90d4696d8f00851873a4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf90d4696d8f00851873a4.md
index 2c679e63177..7d7fc38601f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf90d4696d8f00851873a4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf90d4696d8f00851873a4.md
@@ -7,7 +7,7 @@ dashedName: step-7
 
 # --description--
 
-Below the `team` property, add a new property with a key named `sport` and a string value of `Football`. 
+Below the `team` property, add a new property with a key named `sport` and a string value of `Football`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf91b0ff6e9300ead140cc.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf91b0ff6e9300ead140cc.md
index ec8abe69384..3714c62cac6 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf91b0ff6e9300ead140cc.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf91b0ff6e9300ead140cc.md
@@ -284,7 +284,7 @@ const playersDropdownList = document.getElementById("players");
 const myFavoriteFootballTeam = {
   team: "Argentina",
   sport: "Football",
- 
+
 };
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf93472de77d01bf8474bf.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf93472de77d01bf8474bf.md
index 784c39d0cdc..7935b15618b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf93472de77d01bf8474bf.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63cf93472de77d01bf8474bf.md
@@ -7,7 +7,7 @@ dashedName: step-10
 
 # --description--
 
-Below the `isWorldCupWinner` property, add a new key called `headCoach` with a value of an empty object. Inside that object, add a property with a key of `coachName` and a string value of `Carlos Bilardo`. Below that property, add another key called `matches` with a number value of 7. 
+Below the `isWorldCupWinner` property, add a new key called `headCoach` with a value of an empty object. Inside that object, add a property with a key of `coachName` and a string value of `Carlos Bilardo`. Below that property, add another key called `matches` with a number value of 7.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63d128eaedcc773d2ded2128.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63d128eaedcc773d2ded2128.md
index bb4e4d26627..7bb2e78b95d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63d128eaedcc773d2ded2128.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63d128eaedcc773d2ded2128.md
@@ -373,7 +373,7 @@ const myFavoriteFootballTeam = {
       nickname: null,
     },
 --fcc-editable-region--
- 
+
 --fcc-editable-region--
   ]
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63d12b9c7aaee43de1ba265d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63d12b9c7aaee43de1ba265d.md
index 0a6893610a4..e117f81605f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63d12b9c7aaee43de1ba265d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63d12b9c7aaee43de1ba265d.md
@@ -7,11 +7,11 @@ dashedName: step-14
 
 # --description--
 
-The rest of the data for the `myFavoriteFootballTeam.players` array has been filled out for you. 
+The rest of the data for the `myFavoriteFootballTeam.players` array has been filled out for you.
 
-The next step is to ensure that you can't modify this object by adding or removing any properties. We are going to use a method called `Object.freeze(obj)` which will freeze this object and prevent any changes being made to it. 
+The next step is to ensure that you can't modify this object by adding or removing any properties. We are going to use a method called `Object.freeze(obj)` which will freeze this object and prevent any changes being made to it.
 
-Use the `Object.freeze()` method to freeze the `myFavoriteFootballTeam` object. 
+Use the `Object.freeze()` method to freeze the `myFavoriteFootballTeam` object.
 
 
 # --hints--
@@ -440,7 +440,7 @@ const myFavoriteFootballTeam = {
   ],
 };
 --fcc-editable-region--
- 
+
 --fcc-editable-region--
 
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
index 36937ac905b..f21fcdc5ab2 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
@@ -9,7 +9,7 @@ dashedName: step-15
 
 The next step is to access the key called `sport` from the `myFavoriteFootballTeam` object and assign it to a new `const` variable called `sport`.
 
-Remember you can use dot notation for this. 
+Remember you can use dot notation for this.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
index 4da096e1742..e556c5c05e3 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
@@ -7,7 +7,7 @@ dashedName: step-17
 
 # --description--
 
-In the last two steps, you have been accessing properties from the `myFavoriteFootballTeam` object using dot notation and assigning them to new `const` variables. But in JavaScript, there is an easier way to accomplish the same goal. 
+In the last two steps, you have been accessing properties from the `myFavoriteFootballTeam` object using dot notation and assigning them to new `const` variables. But in JavaScript, there is an easier way to accomplish the same goal.
 
 The <dfn>object destructuring</dfn> syntax allows you to unpack values from arrays and objects:
 
@@ -21,7 +21,7 @@ const developerObj = {
 const { name, isDeveloper } = developerObj;
 ```
 
-Rewrite the two lines of code below using the new destructuring syntax. Your answer should be one line of code. 
+Rewrite the two lines of code below using the new destructuring syntax. Your answer should be one line of code.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
index 7aa331b1fe8..2a8ea3b0d0b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
@@ -7,7 +7,7 @@ dashedName: step-18
 
 # --description--
 
-Next, add the `year` and `players` to your destructuring assignment. 
+Next, add the `year` and `players` to your destructuring assignment.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
index e4fab1fd5c7..ed536a4b70e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
@@ -7,9 +7,9 @@ dashedName: step-20
 
 # --description--
 
-Now you need to start displaying the team's information on the screen. 
+Now you need to start displaying the team's information on the screen.
 
-Below your destructuring assignments, assign the `sport` variable to `typeOfSport.textContent`. 
+Below your destructuring assignments, assign the `sport` variable to `typeOfSport.textContent`.
 
 Once you complete that task, you should see the result in the preview window.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
index 8731c9b5b46..70772e4cba9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
@@ -7,7 +7,7 @@ dashedName: step-22
 
 # --description--
 
-Assign the `year` variable to `worldCupYear.textContent`. 
+Assign the `year` variable to `worldCupYear.textContent`.
 
 Below that, assign the `coachName` variable to `headCoach.textContent`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
index 72739d202cf..862d6c0fd77 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
@@ -9,7 +9,7 @@ dashedName: step-23
 
 Now you will start building out the function that will show player cards based on the selections made by the user in the `Filter Teammates` dropdown menu.
 
-Start by creating an empty arrow function called `setPlayerCards`. You do not need to add a parameter because that will be taken care of in the next step. 
+Start by creating an empty arrow function called `setPlayerCards`. You do not need to add a parameter because that will be taken care of in the next step.
 
 
 # --hints--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
index 1267ecf36fd..5cd7ea1d6e4 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
@@ -7,9 +7,9 @@ dashedName: step-25
 
 # --description--
 
-The next step is to create a new array that will be responsible for adding the player card information to the page. 
+The next step is to create a new array that will be responsible for adding the player card information to the page.
 
-Inside the `setPlayerCards` function, start by adding the `map` method to `arr` that will take in an empty callback function. Then, use the addition assignment `+=` operator to assign the new array to `playerCards.innerHTML`. 
+Inside the `setPlayerCards` function, start by adding the `map` method to `arr` that will take in an empty callback function. Then, use the addition assignment `+=` operator to assign the new array to `playerCards.innerHTML`.
 
 Remember that the `innerHTML` property gets, or in this case, sets the HTML markup for the `playerCards` element.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
index dee3fa8791c..dbeb80c7a4c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
@@ -7,7 +7,7 @@ dashedName: step-27
 
 # --description--
 
-Inside the body of the callback function, you will need to add template literals ``` `` ``` which will contain the HTML content for the player cards. 
+Inside the body of the callback function, you will need to add template literals ` `` ` which will contain the HTML content for the player cards.
 
 Inside the template literals, add an empty `div` with a class of `player-card`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
index 9f5fd937142..3912e0e6228 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
@@ -462,7 +462,7 @@ const setPlayerCards = (arr = players) => {
     ({ name, position, number, isCaptain, nickname }) => {
       `
         <div class="player-card">
-      
+
         </div>
       `;
     }
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
index 53be3642db9..9a21ae45f28 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
@@ -7,9 +7,9 @@ dashedName: step-29
 
 # --description--
 
-The next step would be to display the word `(Captain)` next to the player if they are listed as a captain for the team. 
+The next step would be to display the word `(Captain)` next to the player if they are listed as a captain for the team.
 
-Right next to the `${name}` expression, add a new embedded expression. Inside that expression, use a ternary operator to check if `isCaptain` is true. If so, return `(Captain)` otherwise return an empty string. 
+Right next to the `${name}` expression, add a new embedded expression. Inside that expression, use a ternary operator to check if `isCaptain` is true. If so, return `(Captain)` otherwise return an empty string.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
index dc5d6af5d1d..e037852b3bc 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
@@ -7,11 +7,11 @@ dashedName: step-30
 
 # --description--
 
-Below the `h2` element, add a paragraph element with the text `Position: ` and an embedded expression that contains the `position` parameter.   
+Below the `h2` element, add a paragraph element with the text `Position:` and an embedded expression that contains the `position` parameter.
 
 # --hints--
 
-You should add a new paragraph element with the text `Position: ` followed by the `position` variable.
+You should add a new paragraph element with the text `Position:` followed by the `position` variable.
 
 ```js
 assert.match(code, /\s*<p\s*>\s*Position:\s*\${\s*position\s*}\s*<\/p>\s*/)
@@ -459,7 +459,7 @@ const setPlayerCards = (arr = players) => {
       `
         <div class="player-card">
           <h2>${name} ${isCaptain ? "(Captain)" : ""}</h2>
-          
+
         </div>
       `;
     }
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
index dab743abca9..20e68b6415e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
@@ -7,11 +7,11 @@ dashedName: step-31
 
 # --description--
 
-Below the paragraph element, add another paragraph element with the text `Number: ` and an embedded expression that contains the `number` parameter. 
+Below the paragraph element, add another paragraph element with the text `Number:` and an embedded expression that contains the `number` parameter.
 
 # --hints--
 
-You should add a new paragraph element with the text `Number: ` followed by the `number` variable.
+You should add a new paragraph element with the text `Number:` followed by the `number` variable.
 
 ```js
 assert.match(code, /\s*<p\s*>\s*Number:\s*\${\s*number\s*}\s*<\/p>\s*/)
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
index 9066c23da66..eb225b3116c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
@@ -7,11 +7,11 @@ dashedName: step-32
 
 # --description--
 
-Below your existing paragraph elements, add another paragraph element with the text `Nickname: `. 
+Below your existing paragraph elements, add another paragraph element with the text `Nickname:`.
 
 # --hints--
 
-You should add a new paragraph element with the text `Nickname: `.
+You should add a new paragraph element with the text `Nickname:`.
 
 ```js
 assert.match(code, /\s*<p\s*>\s*Nickname:\s*<\/p>\s*/)
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
index 22689054c2f..401f8fcb289 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
@@ -7,9 +7,9 @@ dashedName: step-33
 
 # --description--
 
-Next to the `Nickname: ` text, add an embedded expression that will show the player's nickname if they have one. 
+Next to the `Nickname:` text, add an embedded expression that will show the player's nickname if they have one.
 
-Use a ternary operator to check if `nickname` is not `null`. If the player has a nickname, display `nickname` otherwise display `"N/A"`. 
+Use a ternary operator to check if `nickname` is not `null`. If the player has a nickname, display `nickname` otherwise display `"N/A"`.
 
 # --hints--
 
@@ -25,7 +25,7 @@ If your ternary is truthy, it should display the player's `nickname`.
 assert.match(code, /\s*<p\s*>\s*Nickname:\s*\$\{\s*nickname\s*(?:!==\s*null)?\s*\?\s*nickname\s*:/)
 ```
 
-If your ternary is falsy, it should display the string `N/A`. 
+If your ternary is falsy, it should display the string `N/A`.
 
 ```js
 assert.match(code, /\s*<p\s*>\s*Nickname:\s*\$\{\s*nickname\s*(?:!==\s*null)?\s*\?\s*nickname\s*:\s*('|"|`)\N\/A\1}\s*<\/p>\s*/)
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
index dd1db1e2d57..e2cf0d8bbea 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
@@ -7,7 +7,7 @@ dashedName: step-34
 
 # --description--
 
-The `.map()` method will return a new array of `player-card` items separated by commas. 
+The `.map()` method will return a new array of `player-card` items separated by commas.
 
 To remove the commas between each `player-card` so it does not show up on screen, chain the `.join()` method to the `.map()` method. Pass an empty string as the argument for the `.join()` method.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
index fb1ca02607d..0544b4bdd11 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
@@ -7,7 +7,7 @@ dashedName: step-35
 
 # --description--
 
-The next step is to create a function that will detect when a user makes a selection from the `playersDropdownList`. 
+The next step is to create a function that will detect when a user makes a selection from the `playersDropdownList`.
 
 Use the `.addEventListener()` method on `playersDropdownList`. Inside the event listener, pass in a `change` event type and an empty callback function.
 
@@ -476,7 +476,7 @@ const setPlayerCards = (arr = players) => {
 
 --fcc-editable-region--
 
-  
+
 
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
index 3daf0b52f4d..91426574c6f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
@@ -7,9 +7,9 @@ dashedName: step-36
 
 # --description--
 
-For the callback function, pass in `e` as a parameter. 
+For the callback function, pass in `e` as a parameter.
 
-`e` represents an object which contains the information for that event. 
+`e` represents an object which contains the information for that event.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
index 03360bfd036..9ad6aab3caa 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
@@ -7,11 +7,11 @@ dashedName: step-37
 
 # --description--
 
-Inside the callback function, add a `console.log` with the value of `e.target.value`. 
+Inside the callback function, add a `console.log` with the value of `e.target.value`.
 
-Open the console, and make a selection from the teammates dropdown menu. You should see the value of that selection in the console. 
+Open the console, and make a selection from the teammates dropdown menu. You should see the value of that selection in the console.
 
-`e.target.value` represents the `value` property from the `playersDropdownList` element. In future steps, you will use this value to show player cards based on the position they play. 
+`e.target.value` represents the `value` property from the `playersDropdownList` element. In future steps, you will use this value to show player cards based on the position they play.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
index 8f6f189ada6..f95cf6e5d4b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
@@ -7,9 +7,9 @@ dashedName: step-38
 
 # --description--
 
-Remove the `console.log` statement you created in the previous step. 
+Remove the `console.log` statement you created in the previous step.
 
-The next step would be to reset the content for the `playerCards` element. 
+The next step would be to reset the content for the `playerCards` element.
 
 Inside the callback function, access the `innerHTML` property of the `playerCards` element and assign it a value of an empty string.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
index cd99b134655..134d1331364 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
@@ -7,9 +7,9 @@ dashedName: step-39
 
 # --description--
 
-The next step would be to add a `switch` statement which will check for the user's selection from the player dropdown menu and filter out cards based on the player's positions. 
+The next step would be to add a `switch` statement which will check for the user's selection from the player dropdown menu and filter out cards based on the player's positions.
 
-Add a `switch` statement and use `e.target.value` for the expression. 
+Add a `switch` statement and use `e.target.value` for the expression.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
index 02dd7e802b2..a3caf074b5c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
@@ -468,7 +468,7 @@ playersDropdownList.addEventListener("change", (e) => {
 --fcc-editable-region--
 
   switch (e.target.value) {
-    
+
   }
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
index ab8afa98def..303dace84dc 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
@@ -7,13 +7,13 @@ dashedName: step-43
 
 # --description--
 
-Next, add a `case` clause for `forward`. 
+Next, add a `case` clause for `forward`.
 
 Inside that `case`, call the `setPlayerCards` function with an argument of `players.filter()`.
 
 Inside the `filter()` method, add a callback function with a parameter of `player` that will check if `player.position` equals `forward`.
 
-Lastly, add a `break` statement below the `setPlayerCards` function call. 
+Lastly, add a `break` statement below the `setPlayerCards` function call.
 
 # --hints--
 
@@ -504,7 +504,7 @@ const setPlayerCards = (arr = players) => {
 
 playersDropdownList.addEventListener("change", (e) => {
   playerCards.innerHTML = "";
-  
+
   switch (e.target.value) {
     case "nickname":
       setPlayerCards(players.filter((player) => player.nickname !== null));
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
index a12dc089eb3..f6cb13c7bc5 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
@@ -512,7 +512,7 @@ playersDropdownList.addEventListener("change", (e) => {
 
 --fcc-editable-region--
 
- 
+
 --fcc-editable-region--
 
   }
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
index 6b1cbd67afb..0543e8d3b98 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
@@ -11,7 +11,7 @@ The final step is to add a `default` clause if none of the other `case` clauses
 
 For the `default` clause, call the `setPlayerCards` function without any arguments passed in.
 
-Test out your dropdown menu, and you should see the player cards be filtered out by position or nickname. 
+Test out your dropdown menu, and you should see the player cards be filtered out by position or nickname.
 
 Congratulations on completing the football team cards project!
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
index de17469bb63..6cd48c0e9a8 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
@@ -10,7 +10,7 @@ dashedName: step-41
 
 Call the `setPlayerCards` function with an argument of `players.filter()`.
 
-Inside the `filter` method, add a callback function with a parameter called `player` and implicitly return `player.nickname` is not `null`. 
+Inside the `filter` method, add a callback function with a parameter called `player` and implicitly return `player.nickname` is not `null`.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/63db7f4677d06d7500a13321.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/63db7f4677d06d7500a13321.md
index 1dcb804fab4..df29e216f6f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/63db7f4677d06d7500a13321.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/63db7f4677d06d7500a13321.md
@@ -21,7 +21,7 @@ You should use the `document.getElementById()` method to get the `#number-input`
 assert.match(code, /document\.getElementById\(\s*('|"|`)number-input\1\s*\)/);
 ```
 
-You should use `const` to declare a variable called `numberInput` and assign it the `#number-input` element. 
+You should use `const` to declare a variable called `numberInput` and assign it the `#number-input` element.
 
 ```js
 assert.match(code, /const\s+numberInput\s*=\s*document\.getElementById\(\s*('|"|`)number-input\1\s*\)/);
@@ -33,7 +33,7 @@ You should use the `document.getElementById()` method to get the `#convert-btn`
 assert.match(code, /document\.getElementById\(\s*('|"|`)convert-btn\1\s*\)/);
 ```
 
-You should use `const` to declare a variable called `convertBtn` and assign it the `#convert-btn` element. 
+You should use `const` to declare a variable called `convertBtn` and assign it the `#convert-btn` element.
 
 ```js
 assert.match(code, /const\s+convertBtn\s*=\s*document\.getElementById\(\s*('|"|`)convert-btn\1\s*\)/);
@@ -45,7 +45,7 @@ You should use the `document.getElementById()` method to get the `#result` eleme
 assert.match(code, /document\.getElementById\(\s*('|"|`)result\1\s*\)/);
 ```
 
-You should use `const` to declare a variable called `result` and assign it the `#result` element. 
+You should use `const` to declare a variable called `result` and assign it the `#result` element.
 
 ```js
 assert.match(code, /const\s+result\s*=\s*document\.getElementById\(\s*('|"|`)result\1\s*\)/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/63e9e5bcec5d33d21b82397e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/63e9e5bcec5d33d21b82397e.md
index f6df930e93e..76e21bf4a86 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/63e9e5bcec5d33d21b82397e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/63e9e5bcec5d33d21b82397e.md
@@ -154,7 +154,7 @@ const result = document.getElementById("result");
 
 const checkUserInput = () => {
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
 };
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64005eb6d2d06a15d9f7611f.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64005eb6d2d06a15d9f7611f.md
index 60d2cfe1de8..f958b43f12f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64005eb6d2d06a15d9f7611f.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64005eb6d2d06a15d9f7611f.md
@@ -9,7 +9,7 @@ dashedName: step-10
 
 In an earlier project you learned about truthy and falsy values, which are values that evaluate to `true` or `false`. In JavaScript, some common falsy values you'll see are `null`, `undefined`, the number `0`, and empty strings.
 
-Rather than check if a value is equal to a falsy value, you can use the <dfn>logical NOT</dfn> operator (`!`) to check if the value itself is falsy. For example:
+Rather than check if a value is equal to a falsy value, you can use the <dfn>logical NOT</dfn> operator (`!`) to check if the value itself is falsy. 예시:
 
 ```js
 const num = 0;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/640067f276acd525509646cc.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/640067f276acd525509646cc.md
index 60abc0d99aa..1287d47d2eb 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/640067f276acd525509646cc.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/640067f276acd525509646cc.md
@@ -9,7 +9,7 @@ dashedName: step-11
 
 Because the `input type="number"` element allows special characters like `.`, `+`, and `e`, users can input floats like `2.2`, equations like `2e+3`, or even just `e`, which you don't want to allow.
 
-A good way to check and normalize numbers in JavaScript is to use the built-in `parseInt()` function, which converts a string into an integer or whole number. `parseInt()` takes at least one argument, a string to be converted into an integer, and returns either an integer or `NaN` which stands for `Not a Number`. For example:
+A good way to check and normalize numbers in JavaScript is to use the built-in `parseInt()` function, which converts a string into an integer or whole number. `parseInt()` takes at least one argument, a string to be converted into an integer, and returns either an integer or `NaN` which stands for `Not a Number`. 예시:
 
 ```js
 parseInt(2.2); // 2
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64007367d54d2a7efbf44fcf.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64007367d54d2a7efbf44fcf.md
index 976ad0d4755..b0f7694109b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64007367d54d2a7efbf44fcf.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64007367d54d2a7efbf44fcf.md
@@ -9,7 +9,7 @@ dashedName: step-12
 
 Next, you need to check if the value returned by the `parseInt()` function is a number or not.
 
-To do that, you can use the `isNaN()` function. This function takes in a string or number as an argument, and returns `true` if it evaluates to `NaN`. For example:
+To do that, you can use the `isNaN()` function. This function takes in a string or number as an argument, and returns `true` if it evaluates to `NaN`. 예시:
 
 ```js
 isNaN("test"); // true
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
index 42af597d9bc..417198b49f7 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
@@ -150,7 +150,7 @@ const checkUserInput = () => {
   if (!numberInput.value || isNaN(parseInt(numberInput.value))) {
     --fcc-editable-region--
     alert("Please provide a decimal number");
-    
+
     --fcc-editable-region--
   }
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6448b4107aadc110a6ab4f65.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6448b4107aadc110a6ab4f65.md
index 28b8cb37402..c261f234830 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6448b4107aadc110a6ab4f65.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6448b4107aadc110a6ab4f65.md
@@ -158,7 +158,7 @@ const result = document.getElementById("result");
 
 const decimalToBinary = (input) => {
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
 };
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6448fefcd6445d6b3d9d63db.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6448fefcd6445d6b3d9d63db.md
index f8dc54c20bb..f024c0e76be 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6448fefcd6445d6b3d9d63db.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6448fefcd6445d6b3d9d63db.md
@@ -160,7 +160,7 @@ convertBtn.addEventListener("click", checkUserInput);
 
 --fcc-editable-region--
 numberInput.addEventListener("keydown", () => {
-  
+
 });
 --fcc-editable-region--
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644b6a23d398bb5f05ef796b.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644b6a23d398bb5f05ef796b.md
index fd5dba84849..53b3d59e46b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644b6a23d398bb5f05ef796b.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644b6a23d398bb5f05ef796b.md
@@ -9,8 +9,8 @@ dashedName: step-23
 
 For the decimal to binary conversion, you need to divide `input` by `2` until the <dfn>quotient</dfn>, or the result of dividing two numbers, is `0`. But since you don't know how many times you need to divide `input` by `2`, you can use a `while` loop to run a block of code as long as `input` is greater than `0` and can be divided.
 
-As a reminder, a `while` loop is used to run a block of code as long as the condition evaluates to `true`, and the condition is checked before the code block is executed. For example:
-  
+As a reminder, a `while` loop is used to run a block of code as long as the condition evaluates to `true`, and the condition is checked before the code block is executed. 예시:
+
 ```js
 let i = 0;
 
@@ -171,7 +171,7 @@ const decimalToBinary = (input) => {
   input = 0;
 
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
 };
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644b6ad4fa8dfd600a9dff2c.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644b6ad4fa8dfd600a9dff2c.md
index 975cb8e59b8..d9b2fc82980 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644b6ad4fa8dfd600a9dff2c.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644b6ad4fa8dfd600a9dff2c.md
@@ -13,7 +13,7 @@ To divide numbers in JavaScript, use the division operator (`/`). For example:
 const quotient = 5 / 2; // 2.5
 ```
 
-In the example above, `5` is the <dfn>dividend</dfn>, or the number to be divided, and `2` is the <dfn>divisor</dfn>, or the number to divide by. The result, `2.5`, is called the <dfn>quotient</dfn>. 
+In the example above, `5` is the <dfn>dividend</dfn>, or the number to be divided, and `2` is the <dfn>divisor</dfn>, or the number to divide by. The result, `2.5`, is called the <dfn>quotient</dfn>.
 
 Inside your `while` loop, create a variable named `quotient` and assign it the value of `input` divided by `2`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644b77a563c51f6ff5237b99.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644b77a563c51f6ff5237b99.md
index dab5f91d002..e7f02f1ab64 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644b77a563c51f6ff5237b99.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644b77a563c51f6ff5237b99.md
@@ -8,7 +8,7 @@ dashedName: step-28
 # --description--
 
 Next, you need to calculate the remainder of `input` divided by `2`. You can do this by using the <dfn>remainder operator</dfn> (`%`), which returns the remainder of the division of two numbers. For example:
-  
+
 ```js
 const remainder = 5 % 2; // 1
 ```
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b5c05986aba539ba6ca03.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b5c05986aba539ba6ca03.md
index 031fd51c96d..36c24d4ca35 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b5c05986aba539ba6ca03.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b5c05986aba539ba6ca03.md
@@ -150,7 +150,7 @@ const decimalToBinary = (input) => {
   const remainders = [];
 
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
 };
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6693d8e1bf60f2d92e67.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6693d8e1bf60f2d92e67.md
index f454cec6b4f..40e4fb7ea38 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6693d8e1bf60f2d92e67.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6693d8e1bf60f2d92e67.md
@@ -9,11 +9,11 @@ dashedName: step-31
 
 Now's a good time to check your work.
 
-Log the text `Inputs: `, followed by a comma, followed by the `inputs` array to the console.
+Log the text `Inputs:`, followed by a comma, followed by the `inputs` array to the console.
 
 # --hints--
 
-You should log the text `Inputs: ` and the `inputs` array to the console, separated by a comma.
+You should log the text `Inputs:` and the `inputs` array to the console, separated by a comma.
 
 ```js
 assert.match(String(decimalToBinary), /console\.log\(\s*('|"|`)Inputs:\s*\1\s*,\s*inputs\s*\)/i);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6c92876e836832538e34.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6c92876e836832538e34.md
index 4e92e536726..3f9a4e484cf 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6c92876e836832538e34.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6c92876e836832538e34.md
@@ -7,17 +7,17 @@ dashedName: step-32
 
 # --description--
 
-Next, log the text `Quotients: `, followed by a comma, followed by the `quotients` array to the console. Also, log the text `Remainders: `, followed by a comma, followed by the `remainders` array.
+Next, log the text `Quotients:`, followed by a comma, followed by the `quotients` array to the console. Also, log the text `Remainders:`, followed by a comma, followed by the `remainders` array.
 
 # --hints--
 
-You should log the text `Quotients: ` and the `quotients` array to the console, separated by a comma.
+You should log the text `Quotients:` and the `quotients` array to the console, separated by a comma.
 
 ```js
 assert.match(String(decimalToBinary), /console\.log\(\s*('|"|`)Quotients:\s*\1\s*,\s*quotients\s*\)/i);
 ```
 
-You should log the text `Remainders: ` and the `remainders` array to the console, separated by a comma.
+You should log the text `Remainders:` and the `remainders` array to the console, separated by a comma.
 
 ```js
 assert.match(String(decimalToBinary), /console\.log\(\s*('|"|`)Remainders:\s*\1\s*,\s*remainders\s*\)/i);
@@ -167,7 +167,7 @@ const decimalToBinary = (input) => {
 
   --fcc-editable-region--
   console.log("Inputs: ", inputs);
-  
+
   --fcc-editable-region--
 };
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
index 2ea712a205a..d0d0ec35907 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
@@ -189,7 +189,7 @@ const decimalToBinary = (input) => {
   console.log("Remainders: ", remainders);
 
   --fcc-editable-region--
-  
+
   --fcc-editable-region--
 };
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645c803cad8434791a5f57b6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645c803cad8434791a5f57b6.md
index ee9e279b4aa..682c0a21f4e 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645c803cad8434791a5f57b6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645c803cad8434791a5f57b6.md
@@ -154,7 +154,7 @@ const decimalToBinary = (input) => {
   let binary = "";
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 };
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645c80ee8b65917a24afcb14.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645c80ee8b65917a24afcb14.md
index 1f6aea93b32..2bae11a23b0 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645c80ee8b65917a24afcb14.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645c80ee8b65917a24afcb14.md
@@ -156,7 +156,7 @@ const decimalToBinary = (input) => {
   let binary = "";
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 
   result.innerText = binary;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645c8fe0c9505407650c4ac6.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645c8fe0c9505407650c4ac6.md
index 40846a040aa..98107575b4c 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645c8fe0c9505407650c4ac6.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645c8fe0c9505407650c4ac6.md
@@ -158,7 +158,7 @@ const countdown = (number) => {
   console.log(number);
 
 --fcc-editable-region--
-  
+
 --fcc-editable-region--
 };
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646203cdc054d012b5d71428.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646203cdc054d012b5d71428.md
index 14e75dee2cb..f5a84a23ed2 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646203cdc054d012b5d71428.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646203cdc054d012b5d71428.md
@@ -165,7 +165,7 @@ const decimalToBinary = (input) => {
   if (input === 0) {
     return "0";
   } 
-  
+
   else {
     return decimalToBinary(Math.floor(input / 2)) + (input % 2);
   }
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
index 7b1450aac10..e2591f9bf63 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
@@ -9,7 +9,7 @@ dashedName: step-73
 
 Now everything should work as expected. And since you know that `input` will either be the numbers `0` or `1` at this point, you can combine your two base cases and just return `input` as a string.
 
-For a reliable way to convert a value into a string, even falsy values like `null` and `undefined`, you can use the `String()` function. For example:
+For a reliable way to convert a value into a string, even falsy values like `null` and `undefined`, you can use the `String()` function. 예시:
 
 ```js
 const num = 5;
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646491d2c856afd17c2f380d.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646491d2c856afd17c2f380d.md
index 551e21f2398..824ed7ec099 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646491d2c856afd17c2f380d.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646491d2c856afd17c2f380d.md
@@ -195,7 +195,7 @@ const showAnimation = () => {
 
   animationData.forEach((obj) => {
 --fcc-editable-region--
-    
+
 --fcc-editable-region--
   });
 };
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646492f5c672c9d32f340c22.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646492f5c672c9d32f340c22.md
index 511d29ab6b9..4a097f992be 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646492f5c672c9d32f340c22.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646492f5c672c9d32f340c22.md
@@ -7,7 +7,7 @@ dashedName: step-92
 
 # --description--
 
-Then, use the compound assignment operator (`+=`) to set the `innerHTML` property of the `animationContainer` to an empty template literal string. 
+Then, use the compound assignment operator (`+=`) to set the `innerHTML` property of the `animationContainer` to an empty template literal string.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646493b7dc53b5d45c9c50fc.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646493b7dc53b5d45c9c50fc.md
index 1377478ab5f..493677bc96f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646493b7dc53b5d45c9c50fc.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646493b7dc53b5d45c9c50fc.md
@@ -19,7 +19,7 @@ You should use the `document.getElementById()` method to get the `#animation-con
 assert.match(code, /document\.getElementById\(\s*('|"|`)animation-container\1\s*\)/);
 ```
 
-You should use `const` to declare a variable called `animationContainer` and assign it the `#animation-container` element. 
+You should use `const` to declare a variable called `animationContainer` and assign it the `#animation-container` element.
 
 ```js
 assert.match(code, /const\s+animationContainer\s*=\s*document\.getElementById\(\s*('|"|`)animation-container\1\s*\)/);
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
index 0618b72445b..955ecf22396 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Back in your event listener, you need to update the text of the `result` element. 
+Back in your event listener, you need to update the text of the `result` element.
 
 After the `if` statement, use a ternary operator to check the truthiness of calling `isSpam()` with `messageInput.value` as the argument. If true, set the `textContent` property on the `result` element to `Oh no! This looks like a spam message.`. Otherwise, set it to `This message does not seem to contain any spam.`
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
index 9e8da0034f4..95557fae99d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
@@ -9,7 +9,7 @@ dashedName: step-4
 
 The `Date` object has a number of methods that allow you to get the date and time in different formats.
 
-One of those is the `.getDate()` method, which returns a number between `1` and `31` that represents the day of the month for that date. For example:
+One of those is the `.getDate()` method, which returns a number between `1` and `31` that represents the day of the month for that date. 예시:
 
 ```js
 const date = new Date();
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
index 5a14ce0bcc4..f29a6c67f7a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
@@ -9,7 +9,7 @@ dashedName: step-5
 
 The `.getMonth()` method returns a number between `0` and `11`. This represents the month for the date provided, where `0` is January and `11` is December.  Because the number this method returns is zero-based, you need to add `1` to it to get the expected month number.
 
-Using `const`, create a variable named `month` and assign it the month from `date` with the `.getMonth()` method. 
+Using `const`, create a variable named `month` and assign it the month from `date` with the `.getMonth()` method.
 
 Remember to add `1` to the number returned by `.getMonth()`.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653887098bdc39b3684a51c8.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653887098bdc39b3684a51c8.md
index fc1b024a7c0..bf90582d8ce 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653887098bdc39b3684a51c8.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653887098bdc39b3684a51c8.md
@@ -7,7 +7,7 @@ dashedName: step-11
 
 # --description--
 
-After the `day` variable, add a dash (`-`) followed by another embedded expression that contains the `month` variable. 
+After the `day` variable, add a dash (`-`) followed by another embedded expression that contains the `month` variable.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388762f61f44b3fd490a4a.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388762f61f44b3fd490a4a.md
index 32716c45f70..0e05cf4d6ad 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388762f61f44b3fd490a4a.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388762f61f44b3fd490a4a.md
@@ -7,7 +7,7 @@ dashedName: step-12
 
 # --description--
 
-After the `month` variable, add a dash followed by another embedded expression that contains the `year` variable. 
+After the `month` variable, add a dash followed by another embedded expression that contains the `year` variable.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
index d25abe69aef..da96053247d 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
@@ -11,7 +11,7 @@ In JavaScript, the `change` event is used to detect when the value of an HTML el
 
 ```js
 element.addEventListener("change", () => {
-    
+
 });
 ```
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388d61a57a00b9ad0d0817.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388d61a57a00b9ad0d0817.md
index 485673a4bc2..13e3d6f024f 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388d61a57a00b9ad0d0817.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388d61a57a00b9ad0d0817.md
@@ -9,7 +9,7 @@ dashedName: step-16
 
 When a user makes a selection from the dropdown menu, the function should get the user's value and display the date in their chosen date format. To do this, you can use the `switch` statement.
 
-A `switch` statement is used to compare an expression against multiple possible values and execute different code blocks based on the match. It's commonly used for branching logic. 
+A `switch` statement is used to compare an expression against multiple possible values and execute different code blocks based on the match. It's commonly used for branching logic.
 
 For example, here's how to compare the expression `dayOfWeek` against possible values:
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388edfdf364fbb04e426f2.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388edfdf364fbb04e426f2.md
index ea7c57f915e..b7d6e279148 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388edfdf364fbb04e426f2.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388edfdf364fbb04e426f2.md
@@ -18,7 +18,7 @@ switch (expr) {
 }
 ```
 
-Add a `case` where the value is `yyyy-mm-dd`. Inside the `case`, set the text content of `currentDateParagraph` to the value of `formattedDate`. 
+Add a `case` where the value is `yyyy-mm-dd`. Inside the `case`, set the text content of `currentDateParagraph` to the value of `formattedDate`.
 
 
 # --hints--
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
index 8a2d1658ddb..5c64acf390b 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
@@ -13,7 +13,7 @@ The `.reverse()` method is used to reverse an array in place. For example:
 const array = [1, 2, 3, 4, 5];
 array.reverse();
 console.log(array); // [5, 4, 3, 2, 1]
-``` 
+```
 
 Chain the `.reverse()` method to the end of `.split()` method.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538935e2ab721beedb137c4.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538935e2ab721beedb137c4.md
index e04fe176fea..5b487e9ae50 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538935e2ab721beedb137c4.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538935e2ab721beedb137c4.md
@@ -9,7 +9,7 @@ dashedName: step-20
 
 Finally, you need to create a string with the reversed array elements separated by dash (`-`) character.
 
-Use the `.join()` method to join the reversed array elements into a string and use a `"-"` for the separator. 
+Use the `.join()` method to join the reversed array elements into a string and use a `"-"` for the separator.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389a63d3b1d6c764c0e10e.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389a63d3b1d6c764c0e10e.md
index bd118c96585..2978be4e3f9 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389a63d3b1d6c764c0e10e.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389a63d3b1d6c764c0e10e.md
@@ -7,7 +7,7 @@ dashedName: step-22
 
 # --description--
 
-Add another `case` with the value `mm-dd-yyyy-h-mm`. Inside that `case`, set the text content of `currentDateParagraph` to empty template literals. 
+Add another `case` with the value `mm-dd-yyyy-h-mm`. Inside that `case`, set the text content of `currentDateParagraph` to empty template literals.
 
 Also, make sure to include a `break` statement to terminate the `switch` statement.
 
diff --git a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389eff4893facbbe6eae67.md b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389eff4893facbbe6eae67.md
index 350cb14ac90..8f497e8f93a 100644
--- a/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389eff4893facbbe6eae67.md
+++ b/curriculum/challenges/korean/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389eff4893facbbe6eae67.md
@@ -272,7 +272,7 @@ dateOptionsSelectElement.addEventListener("change", () => {
     case "mm-dd-yyyy-h-mm":
       currentDateParagraph.textContent = `${month}-${day}-${year} ${hours} Hours ${minutes} Minutes`;
       break;
-    
+
   }
 --fcc-editable-region--
 });
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-build-a-recipe-project/top-build-a-recipe-project.md b/curriculum/challenges/korean/16-the-odin-project/top-build-a-recipe-project/top-build-a-recipe-project.md
index 255514eca51..1589e6bcba8 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-build-a-recipe-project/top-build-a-recipe-project.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-build-a-recipe-project/top-build-a-recipe-project.md
@@ -44,15 +44,13 @@ const body = document.querySelectorAll('html > body')[0];
 assert(html && head && body);
 ```
 
-You should have a `title` element within the `head` element that contains the text 
-`The Odin Recipes`.
+You should have a `title` element within the `head` element that contains the text `The Odin Recipes`.
 
 ```js
 assert(document.querySelectorAll('HEAD > TITLE')[0].innerText == 'The Odin Recipes');
 ```
 
-You should have a `h1` element within your `body` element that contains the text
-`Creamy Chocolate Fudge`.
+You should have a `h1` element within your `body` element that contains the text `Creamy Chocolate Fudge`.
 
 ```js
 assert(document.querySelectorAll('BODY > H1')[0].innerText == 'Creamy Chocolate Fudge');
@@ -116,7 +114,7 @@ const listItems = document.querySelectorAll('OL > LI');
 assert(orderedList && listItems && listItems.length > 1);
 ```
 
-You should have an `h2` element with the text `More Recipes`. 
+You should have an `h2` element with the text `More Recipes`.
 
 ```js
 const h2 = document.querySelectorAll('H2')[3];
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-a.md b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-a.md
index 4894c0ba72d..93c3dc27378 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-a.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-a.md
@@ -4,6 +4,7 @@ title: Introduction to Flexbox Question A
 challengeType: 15
 dashedName: introduction-flexbox-question-a
 ---
+
 # --description--
 
 ## Before we get started
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-b.md b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-b.md
index 502ef8858c9..e0a91b54e4a 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-b.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-b.md
@@ -4,13 +4,14 @@ title: Introduction to Flexbox Question B
 challengeType: 15
 dashedName: introduction-flexbox-question-b
 ---
+
 # --description--
 
 As you’ve seen, flexbox is not just a single CSS property but a whole toolbox of properties that you can use to put things where you need them. Some of these properties belong on the flex container, while some go on the flex items. This is a simple yet important concept.
 
 A flex container is any element that has `display: flex` on it. A flex item is any element that lives directly inside of a flex container.
 
-<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/8c0402439e1b0a9a156731bdab4ea64162688dab/foundations/html_css/flexbox/imgs/03.png">
+<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/8c0402439e1b0a9a156731bdab4ea64162688dab/foundations/html_css/flexbox/imgs/03.png" />
 
 # --question--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-c.md b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-c.md
index a5a692f04ea..7e3b2d5d946 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-c.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-c.md
@@ -4,6 +4,7 @@ title: Introduction to Flexbox Question C
 challengeType: 15
 dashedName: introduction-flexbox-question-c
 ---
+
 # --description--
 
 Somewhat confusingly, any element can be both a flex container and a flex item. Said another way, you can also put `display: flex` on a flex item and then use flexbox to arrange its children.
@@ -12,7 +13,7 @@ Somewhat confusingly, any element can be both a flex container and a flex item.
 
 Creating and nesting multiple flex containers and items is the primary way you will be building up complex layouts. The following image was achieved using only flexbox to arrange, size, and place the various elements. Flexbox is a very powerful tool.
 
-<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/495704c6eb6bf33bc927534f231533a82b27b2ac/html_css/v2/foundations/flexbox/imgs/05.png"/>
+<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/495704c6eb6bf33bc927534f231533a82b27b2ac/html_css/v2/foundations/flexbox/imgs/05.png" />
 
 
 # --question--
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-d.md b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-d.md
index ef64b9338c9..d3029431781 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-d.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-d.md
@@ -4,6 +4,7 @@ title: Introduction to Flexbox Question D
 challengeType: 15
 dashedName: introduction-flexbox-question-d
 ---
+
 # --description--
 
 Now that you have a basic understanding of how flexbox works, what is the primairy role of a flex item in a `flexbox` layout? Try and answer the question below.
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-e.md b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-e.md
index 91ba06f868f..2d214304d81 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-e.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-e.md
@@ -4,6 +4,7 @@ title: Introduction to Flexbox Question E
 challengeType: 15
 dashedName: introduction-flexbox-question-e
 ---
+
 # --description--
 
 The `flex` declaration is actually a shorthand for 3 properties that you can set on a flex item. These properties affect how flex items size themselves within their container. You've seen some shorthand properties before, but you haven't officially defined them yet.
@@ -12,7 +13,7 @@ The `flex` declaration is actually a shorthand for 3 properties that you can set
 
 In this case, `flex` is actually a shorthand for `flex-grow`, `flex-shrink` and `flex-basis`.
 
-<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/0cc6b26bb0c4b94524369d327c97a8fb11e83b6b/foundations/html_css/flexbox/imgs/10.png" alt="flex shorthand">
+<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/0cc6b26bb0c4b94524369d327c97a8fb11e83b6b/foundations/html_css/flexbox/imgs/10.png" alt="flex shorthand" />
 
 In the above screenshot, `flex: 1` equates to: `flex-grow: 1`, `flex-shrink: 1`, `flex-basis: 0`.
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-f.md b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-f.md
index c84f0cab41b..df65af8c2e8 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-f.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-f.md
@@ -4,6 +4,7 @@ title: Introduction to Flexbox Question F
 challengeType: 15
 dashedName: introduction-flexbox-question-f
 ---
+
 # --description--
 
 `flex-grow` expects a single number as its value, and that number is used as the flex-item's "growth factor". When you applied `flex: 1` to every div inside our container, you were telling every div to grow the same amount. The result of this is that every div ends up the exact same size. If you instead add `flex: 2` to just one of the divs, then that div would grow to 2x the size of the others.
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-g.md b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-g.md
index 6bf52d5349a..cfeafe9f326 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-g.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-g.md
@@ -4,6 +4,7 @@ title: Introduction to Flexbox Question G
 challengeType: 15
 dashedName: introduction-flexbox-question-g
 ---
+
 # --description--
 
 `flex-shrink` is similar to `flex-grow`, but sets the "shrink factor" of a flex item. `flex-shrink` only ends up being applied if the size of all flex items is larger than their parent container. For example, if our 3 divs from above had a width declaration like: `width: 100px`, and `.flex-container` was smaller than `300px`, our divs would have to shrink to fit.
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-h.md b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-h.md
index 7fec5e54dd9..e655c27fe8a 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-h.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-h.md
@@ -4,6 +4,7 @@ title: Introduction to Flexbox Question H
 challengeType: 15
 dashedName: introduction-flexbox-question-h
 ---
+
 # --description--
 
 No matter which direction you're using, you need to think of your flex-containers as having 2 axes: the main axis and the cross axis. It is the direction of these axes that changes when the `flex-direction` is changed. In most circumstances, `flex-direction: row` puts the main axis horizontal (left-to-right), and `column` puts the main axis vertical (top-to-bottom).
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-i.md b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-i.md
index 93f9b380fba..33285e4d737 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-i.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-i.md
@@ -4,6 +4,7 @@ title: Introduction to Flexbox Question I
 challengeType: 15
 dashedName: introduction-flexbox-question-i
 ---
+
 # --description--
 
 <iframe allowfullscreen="true" allowpaymentrequest="true" allowtransparency="true" class="cp_embed_iframe " frameborder="0" height="400" width="100%" name="cp_embed_1" scrolling="no" src="https://codepen.io/TheOdinProjectExamples/embed/BaZKPdw?height=400&amp;default-tab=html%2Cresult&amp;slug-hash=BaZKPdw&amp;editable=true&amp;user=TheOdinProjectExamples&amp;name=cp_embed_1" style="width: 100%; overflow:hidden; display:block;" title="CodePen Embed" loading="lazy" id="cp_embed_BaZKPdw"></iframe>
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-j.md b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-j.md
index bbdf499748f..6ab4cb1f90e 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-j.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-j.md
@@ -4,6 +4,7 @@ title: Introduction to Flexbox Question J
 challengeType: 15
 dashedName: introduction-flexbox-question-j
 ---
+
 # --description--
 
 Let's look at an example.
@@ -16,7 +17,7 @@ Adding `flex: 1` to `.item` makes each of the items grow to fill the available s
 
 Remove `flex: 1` from `.item` and add `justify-content: space-between` to `.container`. Doing so should give you something like this:
 
-<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/495704c6eb6bf33bc927534f231533a82b27b2ac/html_css/v2/foundations/flexbox/imgs/07.png" alt="an image displaying three blue squares which are spread out over the entire width of it's container">
+<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/495704c6eb6bf33bc927534f231533a82b27b2ac/html_css/v2/foundations/flexbox/imgs/07.png" alt="an image displaying three blue squares which are spread out over the entire width of it's container" />
 
 `justify-content` aligns items across the **main axis**. There are a few values that you can use here. You'll learn the rest of them in the reading assignments, but for now try changing it to center, which should center the boxes along the main axis.
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-k.md b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-k.md
index 2436aac925c..9ea6a1913b4 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-k.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-k.md
@@ -4,15 +4,16 @@ title: Introduction to Flexbox Question K
 challengeType: 15
 dashedName: introduction-flexbox-question-k
 ---
+
 # --description--
 
 <iframe allowfullscreen="true" allowpaymentrequest="true"
-style="margin: 15px 0"
-allowtransparency="true" class="cp_embed_iframe " frameborder="0" height="400" width="100%" name="cp_embed_1" scrolling="no" src="https://codepen.io/TheOdinProjectExamples/embed/MWoyBzR?height=400&amp;default-tab=html%2Cresult&amp;slug-hash=MWoyBzR&amp;editable=true&amp;user=TheOdinProjectExamples&amp;name=cp_embed_1" style="width: 100%; overflow:hidden; display:block;" title="CodePen Embed" loading="lazy" id="cp_embed_MWoyBzR"></iframe>
+style="width: 100%; overflow:hidden; display:block;"
+allowtransparency="true" class="cp_embed_iframe " frameborder="0" height="400" width="100%" name="cp_embed_1" scrolling="no" src="https://codepen.io/TheOdinProjectExamples/embed/MWoyBzR?height=400&amp;default-tab=html%2Cresult&amp;slug-hash=MWoyBzR&amp;editable=true&amp;user=TheOdinProjectExamples&amp;name=cp_embed_1" title="CodePen Embed" loading="lazy" id="cp_embed_MWoyBzR"></iframe>
 
 To change the placement of items along the cross axis use `align-items`. Try getting the boxes to the center of the container by adding `align-items: center` to `.container`. The desired result looks like this:
 
-<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/495704c6eb6bf33bc927534f231533a82b27b2ac/html_css/v2/foundations/flexbox/imgs/08.png" alt="an image displaying three blue squares which are centered in the middle of the flex container" style="margin: 15px 0">
+<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/495704c6eb6bf33bc927534f231533a82b27b2ac/html_css/v2/foundations/flexbox/imgs/08.png" alt="an image displaying three blue squares which are centered in the middle of the flex container" style="margin: 15px 0" />
 
 Because `justify-content` and `align-items` are based on the main and cross axis of your container, their behavior changes when you change the flex-direction of a flex-container. For example, when you change `flex-direction` to `column`, `justify-content` aligns vertically and `align-items` aligns horizontally. The most common behavior, however, is the default, i.e. `justify-content` aligns items horizontally (because the main axis defaults to horizontal), and `align-items` aligns them vertically. One of the biggest sticking points that beginners have with flexbox is confusion when this behavior changes.
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-a.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-a.md
index debc3c67b6a..ee8f5c7379c 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-a.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-a.md
@@ -4,6 +4,7 @@ title: Learn Block and Inline Question A
 challengeType: 15
 dashedName: learn-block-and-inline-question-a
 ---
+
 # --description--
 
 Most of the elements that you have learned about so far are block elements. In other words, their default style is `display: block`. By default, block elements will appear on the page stacked atop each other, each new element starting on a new line.
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-b.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-b.md
index 95e0fd91881..5db2fee526d 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-b.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-b.md
@@ -4,15 +4,16 @@ title: Learn Block and Inline Question B
 challengeType: 15
 dashedName: learn-block-and-inline-question-b
 ---
+
 # --description--
 
 Inline elements, however, do not start on a new line. They appear in line with whatever elements they are placed beside. A clear example of an inline element is a link, or `<a>` tag. If you stick one of these in the middle of a paragraph of text, it will behave like a part of the paragraph. <a  href="https://www.freecodecamp.org/" target="_blank">(Like this)</a> The link’s text will sit alongside other words in that paragraph. Additionally, padding and margin behave differently on inline elements. In general, you do not want to try to put extra padding or margin on inline elements.
 
-# --question-- 
+# --question--
 
 ## --assignment--
 
-Search the web for a list of `block` elements and a list of `inline` elements. 
+Search the web for a list of `block` elements and a list of `inline` elements.
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-c.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-c.md
index 6cbcad92f7d..deb5802961f 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-c.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-c.md
@@ -4,11 +4,12 @@ title: Learn Block and Inline Question C
 challengeType: 15
 dashedName: learn-block-and-inline-question-c
 ---
+
 # --description--
 
 Padding is used to create space around an element's content, inside of any defined borders. With inline elements, padding adds space to the left, right, top, and bottom of the content. However, it's important to note that while padding does affect the space around the content, it does not affect the layout of other elements around the inline element. This means that horizontal padding (left and right) is respected, but vertical padding (top and bottom) does not cause other elements to move away.
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-d.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-d.md
index 49a63bf6974..10a4c301da6 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-d.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-d.md
@@ -4,11 +4,12 @@ title: Learn Block and Inline Question D
 challengeType: 15
 dashedName: learn-block-and-inline-question-d
 ---
+
 # --description--
 
 Now that you have a basic understanding on how adding width and height to `inline` elements works, what happens when you add a top margin to an `inline` element?
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-e.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-e.md
index fc5e9e1eeae..98c822a5bdf 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-e.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-e.md
@@ -4,11 +4,12 @@ title: Learn Block and Inline Question E
 challengeType: 15
 dashedName: learn-block-and-inline-question-e
 ---
+
 # --description--
 
 Inline-block elements behave like inline elements, but with block-style padding and margin. `display: inline-block` is a useful tool to know about, but in practice, you'll probably end up reaching for flexbox more often if you're trying to line up a bunch of boxes. Flexbox will be covered in-depth in the next lesson.
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-f.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-f.md
index 6f1b9a6759f..d7a5e8c4b3e 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-f.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-f.md
@@ -4,11 +4,12 @@ title: Learn Block and Inline Question F
 challengeType: 15
 dashedName: learn-block-and-inline-question-f
 ---
+
 # --description--
 
 The concept of “Normal flow” is implied in the box-model resources, but isn’t laid out very specifically. Read <a href="https://developer.mozilla.org/en-US/docs/Learn/CSS/CSS_layout/Normal_Flow" target="_blank">Normal Flow</a> from MDN to make sure you understand how elements lay themselves out by default.
 
-# --question-- 
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-g.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-g.md
index dfa988edd5d..35215175322 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-g.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-g.md
@@ -4,11 +4,12 @@ title: Learn Block and Inline Question G
 challengeType: 15
 dashedName: learn-block-and-inline-question-g
 ---
+
 # --description--
 
 Now that you have some basic understanding of `block` and inline `elements`, pull up your list of `block` and `inline` elements from a couple questions ago and see if you can identify which of the following elements are `block` elements and which are `inline` elements.
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-h.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-h.md
index 2e14d55c0dc..6489645ac41 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-h.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-h.md
@@ -4,11 +4,12 @@ title: Learn Block and Inline Question H
 challengeType: 15
 dashedName: learn-block-and-inline-question-h
 ---
+
 # --description--
 
 Now that you have some basic understanding of `block` and inline elements, pull up your list of `block` and `inline` elements from a couple questions ago and see if you can identify which of the following elements are `block` elements and which are `inline` elements.
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-i.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-i.md
index fa0f99f7ff1..4b058d62b18 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-i.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-i.md
@@ -4,11 +4,12 @@ title: Learn Block and Inline Question I
 challengeType: 15
 dashedName: learn-block-and-inline-question-i
 ---
+
 # --description--
 
 You can't talk about `block` and `inline` elements without discussing `div`s and `span`s. All the other HTML elements you have encountered so far give meaning to their content. For example, paragraph elements tell the browser to display the text it contains as a paragraph. Strong elements tell the browser which texts within are important and so on. Yet, `div`s and `span`s give no particular meaning to their content. They are just generic boxes that can contain anything.
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-j.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-j.md
index 722b7c3b19b..5f81f5020ca 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-j.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-j.md
@@ -4,11 +4,12 @@ title: Learn Block and Inline Question J
 challengeType: 15
 dashedName: learn-block-and-inline-question-j
 ---
+
 # --description--
 
 Now that you have a basic understanding on how adding width and height to `inline` elements works, what happens when you add a top padding of 10 pixels to a `span` element?
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-k.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-k.md
index 66ed72db140..c204799d7d3 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-k.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-k.md
@@ -4,11 +4,12 @@ title: Learn Block and Inline Question K
 challengeType: 15
 dashedName: learn-block-and-inline-question-k
 ---
+
 # --description--
 
 Now that you have a basic understanding on how adding width and height to `inline` elements works.
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-a.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-a.md
index 6581be03037..f576d444df1 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-a.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-a.md
@@ -7,8 +7,7 @@ dashedName: css-foundations-exercise-a
 
 # --description--
 
-**Objective:** 
-In this exercise, you're going to practice adding CSS to an HTML file using all three methods: external CSS, internal CSS, and inline CSS. You should only be using type selectors for this exercise when adding styles via the external and internal methods. You should also use keywords for colors (e.g. "blue") instead of using `RGB` or `HEX` values.
+**Objective:** In this exercise, you're going to practice adding CSS to an HTML file using all three methods: external CSS, internal CSS, and inline CSS. You should only be using type selectors for this exercise when adding styles via the external and internal methods. You should also use keywords for colors (e.g. "blue") instead of using `RGB` or `HEX` values.
 
 ## User Stories
 
@@ -121,7 +120,7 @@ if (rules) {
 
 assert(pIsStyled);
 ```
- 
+
 The `button` element should have its `background-color` set to `orange`.
 
 ```js
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-b.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-b.md
index 4dad933ea13..32ab77e3aea 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-b.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-b.md
@@ -46,7 +46,7 @@ const p = Array.from(document.querySelectorAll('P'));
 
 const everyPHasBackgroundColor = p?.every((paragraph) => {
   const style = getComputedStyle(paragraph);
-  
+
   return style?.backgroundColor === 'rgb(255, 255, 0)';
 })
 
@@ -81,7 +81,7 @@ assert(thirdElementClasses.some(thirdElementClass => {
 
 }))
 
-``` 
+```
 
 The fourth element should have a `font-size` of `24px`.
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
index a721563d96d..1f1a60542e3 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
@@ -109,7 +109,6 @@ assert(getCorrectStyle()?.textAlign === 'center');
 # --seed--
 
 ## --seed-contents--
-
 ```css
 ```
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-a.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-a.md
index b55a7cef82f..425d54224f6 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-a.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-a.md
@@ -5,6 +5,7 @@ title: CSS Foundations Question A
 challengeType: 15
 dashedName: css-foundations-question-a
 ---
+
 # --description--
 
 A type selector (or element selector) will select all elements of the given element type, and the syntax is just the name of the element:
@@ -28,7 +29,7 @@ div {
 
 Here, all three `<div>` elements would be selected, while the `<p>` element wouldn’t be.
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-b.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-b.md
index 2c18fa42dcf..aad3818d270 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-b.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-b.md
@@ -5,6 +5,7 @@ title: CSS Foundations Question B
 challengeType: 15
 dashedName: css-foundations-question-b
 ---
+
 # --description--
 
 Class selectors will select all elements with the given `class`, which is just an attribute you place on an HTML element. Here’s how you add a class to an HTML tag and select it in CSS:
@@ -50,7 +51,7 @@ Instead of a period, you use a hashtag immediately followed by the case-sensitiv
 
 The major difference between classes and IDs is that an element can only have one `id`. An `id` cannot be repeated on a single page, and the `id` attribute should not contain any whitespace at all.
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-c.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-c.md
index 77bf0e14f10..eb36575f5e7 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-c.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-c.md
@@ -5,6 +5,7 @@ title: CSS Foundations Question C
 challengeType: 15
 dashedName: css-foundations-question-c
 ---
+
 # --description--
 
 What if you have two groups of elements that share some of their style declarations?
@@ -43,7 +44,7 @@ Both our `.read` and `.unread` selectors share the `color: white;` and `backgrou
 
 Both of the examples above (with and without grouping) will have the same result, but the second example reduces the repetition of declarations and makes it easier to edit either the `color` or `background-color` for both classes at once.
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-d.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-d.md
index fdfb6e9c573..4cfe1014093 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-d.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-d.md
@@ -5,6 +5,7 @@ title: CSS Foundations Question D
 challengeType: 15
 dashedName: css-foundations-question-d
 ---
+
 # --description--
 
 Another way to use selectors is to chain them as a list without any separation. Let’s say you had the following HTML:
@@ -49,7 +50,7 @@ You can take the two elements above and combine them with the following:
 
 In general, you can’t chain more than one type selector since an element can’t be two different types at once. For example, chaining two type selectors like `div` and `p` would give us the selector `divp`, which wouldn’t work since the selector would try to find a literal `<divp>` element, which doesn’t exist.
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-e.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-e.md
index 665bf8b1263..b6038767181 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-e.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-e.md
@@ -5,6 +5,7 @@ title: CSS Foundations Question E
 challengeType: 15
 dashedName: css-foundations-question-e
 ---
+
 # --description--
 
 Combinators allow us to combine multiple selectors differently than either grouping or chaining them, as they show a relationship between the selectors. There are four types of combinators in total, but for right now we’re going to only show you the descendant combinator, which is represented in CSS by a single space between selectors. A descendant combinator will only cause elements that match the last selector to be selected if they also have an ancestor (parent, grandparent, etc) that matches the previous selector.
@@ -36,7 +37,7 @@ In the above example, the first two elements with the `contents` class (`B` and
 
 There’s really no limit to how many combinators you can add to a rule, so `.one .two .three .four` would be totally valid. This would just select an element that has a class of `four` if it has an ancestor with a class of `three`, and if that ancestor has its own ancestor with a class of `two`, and so on. You generally want to avoid trying to select elements that need this level of nesting, though, as it can get pretty confusing and long, and it can cause issues when it comes to specificity.
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-f.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-f.md
index 4d0e5512abe..5a18ff3b1a4 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-f.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-f.md
@@ -5,6 +5,7 @@ title: CSS Foundations Question F
 challengeType: 15
 dashedName: css-foundations-question-f
 ---
+
 # --description--
 
 Okay, you went over quite a bit so far. The only thing left for now is to go over how to add all this CSS to your HTML. There are three methods to do so.
@@ -13,7 +14,7 @@ External CSS is the most common method you will come across, and it involves cre
 
 First, you add a self-closing `<link>` element inside of the opening and closing `<head>` tags of the HTML file. The `href` attribute is the location of the CSS file, either an absolute URL or, what you’ll be utilizing, a URL relative to the location of the HTML file. In the example above, you are assuming both files are located in the same directory. The `rel` attribute is required, and it specifies the relationship between the HTML file and the linked file.
 
-Then inside of the newly created `styles.css` file, you have the selector (the `div` and `p`), followed by a pair of opening and closing curly braces, which create a “declaration block”. Finally, you place any declarations inside of the declaration block. `color: white; ` is one declaration, with `color` being the property and `white` being the value, and `background-color: black;` is another declaration.
+Then inside of the newly created `styles.css` file, you have the selector (the `div` and `p`), followed by a pair of opening and closing curly braces, which create a “declaration block”. Finally, you place any declarations inside of the declaration block. `color: white;` is one declaration, with `color` being the property and `white` being the value, and `background-color: black;` is another declaration.
 
 A note on file names: `styles.css` is just what you went with as the file name here. You can name the file whatever you want as long as the file type is `.css`, though “style” or “styles” is most commonly used.
 
@@ -22,7 +23,7 @@ A couple of the pros to this method are:
 1. It keeps your HTML and CSS separated, which results in the HTML file being smaller and making things look cleaner.
 2. You only need to edit the CSS in one place, which is especially handy for websites with many pages that all share similar styles.
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-g.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-g.md
index 6033efe5c21..7da4a22a122 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-g.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-g.md
@@ -5,6 +5,7 @@ title: CSS Foundations Question G
 challengeType: 15
 dashedName: css-foundations-question-g
 ---
+
 # --description--
 
 Internal CSS (or embedded CSS) involves adding the CSS within the HTML file itself instead of creating a completely separate file. With the internal method, you place all the rules inside of a pair of opening and closing `<style>` tags, which are then placed inside of the opening and closing `<head>` tags of your HTML file. Since the styles are being placed directly inside of the `<head>` tags, you no longer need a `<link>` element that the external method requires.
@@ -29,7 +30,7 @@ Besides these differences, the syntax is exactly the same as the external method
 
 This method can be useful for adding unique styles to a single page of a website, but it doesn’t keep things separate like the external method, and depending on how many rules and declarations there are it can cause the HTML file to get pretty big.
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-h.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-h.md
index de3f25515c2..2b39dd69ed3 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-h.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-foundations/css-foundations-question-h.md
@@ -5,6 +5,7 @@ title: CSS Foundations Question H
 challengeType: 15
 dashedName: css-foundations-question-h
 ---
+
 # --description--
 
 Inline `CSS` makes it possible to add styles directly to `HTML` elements, though this method isn’t as recommended:
@@ -19,11 +20,9 @@ The first thing to note is that there aren't any selectors here, since the style
 
 If you need to add a unique style for a single element, this method can work just fine. Generally, though, this isn’t exactly a recommended way for adding CSS to HTML for a few reasons:
 
-It can quickly become pretty messy once you start adding a lot of declarations to a single element, causing your HTML file to become unnecessarily bloated.
-If you want many elements to have the same style, you would have to copy + paste the same style to each individual element, causing lots of unnecessary repetition and more bloat.
-Any inline CSS will override the other two methods, which can cause unexpected results. (While you won’t dive into it here, this can actually be taken advantage of).
+It can quickly become pretty messy once you start adding a lot of declarations to a single element, causing your HTML file to become unnecessarily bloated. If you want many elements to have the same style, you would have to copy + paste the same style to each individual element, causing lots of unnecessary repetition and more bloat. Any inline CSS will override the other two methods, which can cause unexpected results. (While you won’t dive into it here, this can actually be taken advantage of).
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-specificity/the-cascade-of-css-question-f.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-specificity/the-cascade-of-css-question-f.md
index b8a8f09e257..0e5d6263846 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-css-specificity/the-cascade-of-css-question-f.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-css-specificity/the-cascade-of-css-question-f.md
@@ -34,8 +34,7 @@ Here both rule 1 and rule 2 have the same specificity. Rule 1 uses a chaining se
 
 This example shows the same thing. Even though rule 2 is using a child combinator (`>`), this does not change the specificity value. Both rules still have two classes so they have the same specificity values.
 
-*Note:* Not everything adds to specificity
-When comparing selectors, you may come across special symbols for the universal selector (`*`) as well as combinators (`+`, `~`, `>`, and an empty space). These symbols do not add any specificity in and of themselves.
+*Note:* Not everything adds to specificity When comparing selectors, you may come across special symbols for the universal selector (`*`) as well as combinators (`+`, `~`, `>`, and an empty space). These symbols do not add any specificity in and of themselves.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-a.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-a.md
index 2b1e693b7c1..32861ac8835 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-a.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-a.md
@@ -5,6 +5,7 @@ title: HTML Foundations Question A
 challengeType: 15
 dashedName: html-foundations-question-a
 ---
+
 # --description--
 
 Almost all elements on an HTML page are just pieces of content wrapped in opening and closing HTML tags.
@@ -15,7 +16,7 @@ Closing tags tell the browser where an element ends. They are almost the same as
 
 A full paragraph element looks like this:
 
-<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/90b1a362af0bb8635af9593cd8911c9aefb68569/foundations/html_css/html-foundations/imgs/00.png" alt="element diagram">
+<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/90b1a362af0bb8635af9593cd8911c9aefb68569/foundations/html_css/html-foundations/imgs/00.png" alt="element diagram" />
 
 # --assignment--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-b.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-b.md
index e39c54c32c2..1f0046dc01a 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-b.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-b.md
@@ -4,6 +4,7 @@ title: HTML Foundations Question B
 challengeType: 15
 dashedName: html-foundations-question-b
 ---
+
 # --description--
 
 You can think of elements as containers for content. The opening and closing tags tell the browser what content the element contains. The browser can then use that information to determine how it should interpret and format the content.
@@ -15,7 +16,7 @@ HTML has a vast list of predefined tags that you can use to create all kinds of
 Using the correct elements for content is called semantic HTML. You will explore this in much more depth later on in the curriculum.
 
 # --question--
-    
+
 ## --text--
 
 Why are self-closing tags like `<br/>` or `<img>` essential in HTML?
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-c.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-c.md
index d754ed6ec14..8c3dab46a73 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-c.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-c.md
@@ -29,9 +29,9 @@ The doctypes for older versions of HTML were a bit more complicated. For example
 
 However, you probably won’t ever want to be using an older version of HTML, and so you’ll always use `<!DOCTYPE html>`.
 
-Open the `index.html` file created earlier in your text editor and add `<!DOCTYPE html>` to the very first line. 
+Open the `index.html` file created earlier in your text editor and add `<!DOCTYPE html>` to the very first line.
 
-# --question-- 
+# --question--
 ## --text--
 
 What is the purpose of the `DOCTYPE` declaration?
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-d.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-d.md
index ae7cc72ecde..d851163101c 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-d.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-d.md
@@ -23,7 +23,7 @@ Back in the `index.html` file, let’s add the `<html>` element by typing out it
 `lang` specifies the language of the text content in that element. This attribute is primarily used for improving accessibility of the webpage. It allows assistive technologies, for example screen readers, to adapt according to the language and invoke correct pronunciation.
 
 # --question--
-    
+
 ## --text--
 
 What is the `html` element?
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-e.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-e.md
index 93a13cfe853..f5923a1fffe 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-e.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-e.md
@@ -42,7 +42,7 @@ Back in `index.html` file, let’s add a `head` element with a `charset` `meta`
 ```
 
 # --question--
-    
+
 ## --text--
 
 What is the purpose of the `head` element?
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-f.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-f.md
index 0b4e4e39fad..596fd49e18d 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-f.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-f.md
@@ -5,6 +5,7 @@ title: HTML Foundations Question F
 challengeType: 15
 dashedName: html-foundations-question-f
 ---
+
 # --description--
 
 The final element needed to complete the HTML boilerplate is the `<body>` element. This is where all the content that will be displayed to users will go - the text, images, lists, links, and so on.
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-g.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-g.md
index 866d142a44b..9e6f7ed27b3 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-g.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-g.md
@@ -10,7 +10,7 @@ dashedName: html-foundations-question-g
 HTML and CSS are two languages that work together to create everything that you see when you look at something on the internet. HTML is the raw data that a webpage is built out of. All the text, links, cards, lists, and buttons are created in HTML. CSS is what adds style to those plain elements. HTML puts information on a webpage, and CSS positions that information, gives it color, changes the font, and makes it look great!
 
 # --question--
-    
+
 ## --text--
 
 What are the primary responsibilities of HTML and CSS in creating a webpage?
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
index 81ed8271c36..cf7e94d0967 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
@@ -10,7 +10,7 @@ dashedName: html-foundations-question-h
 Many helpful resources out there keep referring to HTML and CSS as programming languages, but if you want to get technical, labeling them as such is not quite accurate. This is because they are only concerned with presenting information. They are not used to program logic. JavaScript, which you will learn in the next section, is a programming language because it’s used to make webpages do things. Yet, there is quite a lot you can do with just HTML and CSS, and you will definitely need them both. Throughout our curriculum, the following lessons focus on giving you the tools you need to succeed once you reach JavaScript content.
 
 # --question--
-    
+
 ## --text--
 
 Why are HTML and CSS not typically classified as programming languages?
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-a.md b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-a.md
index 860079ebb73..09759d1d3e7 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-a.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-a.md
@@ -5,6 +5,7 @@ title: Links and Images Question A
 challengeType: 15
 dashedName: links-and-images-question-a
 ---
+
 # --description--
 
 To get some practice using links and images throughout this lesson you need an HTML project to work with.
@@ -18,8 +19,7 @@ To get some practice using links and images throughout this lesson you need an H
 - Finally, add the following `h1` to the `body`: `<h1>Homepage</h1>`
 
 ## Anchor Elements
-To create a link in HTML, you use the anchor element. An anchor element is defined by wrapping the text or another HTML element you want to be a link with an `<a>` tag.
-Add the following to the `body` of the `index.html` page you created and open it in the browser:
+To create a link in HTML, you use the anchor element. An anchor element is defined by wrapping the text or another HTML element you want to be a link with an `<a>` tag. Add the following to the `body` of the `index.html` page you created and open it in the browser:
 
 ```html
 <a>click me</a>
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-b.md b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-b.md
index f9501f04308..a138268c406 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-b.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-b.md
@@ -4,6 +4,7 @@ title: Links and Images Question B
 challengeType: 15
 dashedName: links-and-images-question-b
 ---
+
 # --description--
 
 To get some practice using links and images throughout this lesson you need an HTML project to work with.
@@ -17,25 +18,21 @@ To get some practice using links and images throughout this lesson you need an H
 - finally, add the following `h1` to the `body`: `<h1>Homepage</h1>`
 
 ## Anchor Elements
-To create a link in HTML, you use the anchor element. An anchor element is defined by wrapping the text or another HTML element you want to be a link with an `<a>` tag.
-Add the following to the `body` of the `index.html` page you created and open it in the browser:
+To create a link in HTML, you use the anchor element. An anchor element is defined by wrapping the text or another HTML element you want to be a link with an `<a>` tag. Add the following to the `body` of the `index.html` page you created and open it in the browser:
 
 ```html
 <a>click me</a>
 ```
 
-You may have noticed that clicking this link doesn’t do anything. This is because an anchor tag on its own won’t know where you want to link to. You have to tell it a destination to go to. You do this by using an HTML attribute.
-An HTML attribute gives additional information to an HTML element and always goes in the element’s opening tag. An attribute is usually made up of two parts: a name, and a value; however, not all attributes require a value. In your case, you need to add a `href` (hyperlink reference) attribute to the opening anchor tag. The value of the `href` attribute is the destination you want your link to go to.
-Add the following `href` attribute to the anchor element you created previously and try clicking it again, don’t forget to refresh the browser so the new changes can be applied.
+You may have noticed that clicking this link doesn’t do anything. This is because an anchor tag on its own won’t know where you want to link to. You have to tell it a destination to go to. You do this by using an HTML attribute. An HTML attribute gives additional information to an HTML element and always goes in the element’s opening tag. An attribute is usually made up of two parts: a name, and a value; however, not all attributes require a value. In your case, you need to add a `href` (hyperlink reference) attribute to the opening anchor tag. The value of the `href` attribute is the destination you want your link to go to. Add the following `href` attribute to the anchor element you created previously and try clicking it again, don’t forget to refresh the browser so the new changes can be applied.
 
 ```html
 <a href="https://www.theodinproject.com/about">click me</a>
 ```
 
-By default, any text wrapped with an anchor tag without a `href` attribute will look like plain text. If the `href` attribute is present, the browser will give the text a blue color and underline it to signify it is a link.
-It’s worth noting you can use anchor tags to link to any kind of resource on the internet, not just other HTML documents. You can link to videos, pdf files, images, and so on, but for the most part, you will be linking to other HTML documents.
+By default, any text wrapped with an anchor tag without a `href` attribute will look like plain text. If the `href` attribute is present, the browser will give the text a blue color and underline it to signify it is a link. It’s worth noting you can use anchor tags to link to any kind of resource on the internet, not just other HTML documents. You can link to videos, pdf files, images, and so on, but for the most part, you will be linking to other HTML documents.
 
-# --question--    
+# --question--
 ## --text--
 
 What is an attribute?
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-c.md b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-c.md
index 314e4d1e013..8863b087456 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-c.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-c.md
@@ -4,6 +4,7 @@ title: Links and Images Question C
 challengeType: 15
 dashedName: links-and-images-question-c
 ---
+
 # --description--
 
 To get some practice using links and images throughout this lesson you need an HTML project to work with.
@@ -17,23 +18,19 @@ To get some practice using links and images throughout this lesson you need an H
 - finally, add the following `h1` to the `body`: `<h1>Homepage</h1>`
 
 ## Anchor Elements
-To create a link in HTML, you use the anchor element. An anchor element is defined by wrapping the text or another HTML element you want to be a link with an `<a>` tag.
-Add the following to the `body` of the `index.html` page you created and open it in the browser:
+To create a link in HTML, you use the anchor element. An anchor element is defined by wrapping the text or another HTML element you want to be a link with an `<a>` tag. Add the following to the `body` of the `index.html` page you created and open it in the browser:
 
 ```html
 <a>click me</a>
 ```
 
-You may have noticed that clicking this link doesn’t do anything. This is because an anchor tag on its own won’t know where you want to link to. You have to tell it a destination to go to. You do this by using an HTML attribute.
-An HTML attribute gives additional information to an HTML element and always goes in the element’s opening tag. An attribute is usually made up of two parts: a name, and a value; however, not all attributes require a value. In your case, you need to add a `href` (hyperlink reference) attribute to the opening anchor tag. The value of the `href` attribute is the destination you want your link to go to.
-Add the following `href` attribute to the anchor element you created previously and try clicking it again, don’t forget to refresh the browser so the new changes can be applied.
+You may have noticed that clicking this link doesn’t do anything. This is because an anchor tag on its own won’t know where you want to link to. You have to tell it a destination to go to. You do this by using an HTML attribute. An HTML attribute gives additional information to an HTML element and always goes in the element’s opening tag. An attribute is usually made up of two parts: a name, and a value; however, not all attributes require a value. In your case, you need to add a `href` (hyperlink reference) attribute to the opening anchor tag. The value of the `href` attribute is the destination you want your link to go to. Add the following `href` attribute to the anchor element you created previously and try clicking it again, don’t forget to refresh the browser so the new changes can be applied.
 
 ```html
 <a href="https://www.theodinproject.com/about">click me</a>
 ```
 
-By default, any text wrapped with an anchor tag without a `href` attribute will look like plain text. If the `href` attribute is present, the browser will give the text a blue color and underline it to signify it is a link.
-It’s worth noting you can use anchor tags to link to any kind of resource on the internet, not just other HTML documents. You can link to videos, pdf files, images, and so on, but for the most part, you will be linking to other HTML documents.
+By default, any text wrapped with an anchor tag without a `href` attribute will look like plain text. If the `href` attribute is present, the browser will give the text a blue color and underline it to signify it is a link. It’s worth noting you can use anchor tags to link to any kind of resource on the internet, not just other HTML documents. You can link to videos, pdf files, images, and so on, but for the most part, you will be linking to other HTML documents.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-d.md b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-d.md
index 3533bc43f05..19e8da36314 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-d.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-d.md
@@ -5,6 +5,7 @@ title: Links and Images Question D
 challengeType: 15
 dashedName: links-and-images-question-d
 ---
+
 # --description--
 
 
@@ -48,9 +49,9 @@ Back in the `index` page, add the following anchor element to create a link to t
 ```html
 <body>
   <h1>Homepage</h1>
-	<a href="https://www.theodinproject.com/about">click me</a>
+    <a href="https://www.theodinproject.com/about">click me</a>
 
-	<a href="about.html">About</a>
+    <a href="about.html">About</a>
 </body>
 ```
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-e.md b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-e.md
index c987054d81c..351ffb27ca6 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-e.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-e.md
@@ -5,6 +5,7 @@ title: Links and Images Question E
 challengeType: 15
 dashedName: links-and-images-question-e
 ---
+
 # --description--
 
 Websites would be fairly boring if they could only display text. Luckily HTML provides a wide variety of elements for displaying all sorts of different media. The most widely used of these is the image element.
@@ -30,11 +31,11 @@ Finally add the image to the `index.html` file:
 ```html
 <body>
   <h1>Homepage</h1>
-	<a href="https://www.theodinproject.com/about">click me</a>
+    <a href="https://www.theodinproject.com/about">click me</a>
 
-	<a href="pages/about.html">About</a>
+    <a href="pages/about.html">About</a>
 
-	<img src="images/dog.jpg">
+    <img src="images/dog.jpg">
 </body>
 ```
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-f.md b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-f.md
index ce3bd678983..1e8afaad525 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-f.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-f.md
@@ -4,6 +4,7 @@ title: Links and Images Question F
 challengeType: 15
 dashedName: links-and-images-question-f
 ---
+
 # --description--
 
 Websites would be fairly boring if they could only display text. Luckily HTML provides a wide variety of elements for displaying all sorts of different media. The most widely used of these is the image element.
@@ -29,11 +30,11 @@ Finally add the image to the `index.html` file:
 ```html
 <body>
   <h1>Homepage</h1>
-	<a href="https://www.theodinproject.com/about">click me</a>
+    <a href="https://www.theodinproject.com/about">click me</a>
 
-	<a href="pages/about.html">About</a>
+    <a href="pages/about.html">About</a>
 
-	<img src="images/dog.jpg">
+    <img src="images/dog.jpg">
 </body>
 ```
 
@@ -70,7 +71,7 @@ This is how the The Odin Project logo example you used earlier looks with an alt
 <iframe allowfullscreen="true" allowpaymentrequest="true" allowtransparency="true" class="cp_embed_iframe " frameborder="0" height="300" width="100%" name="cp_embed_2" scrolling="no" src="https://codepen.io/TheOdinProjectExamples/embed/ExXjoEp?height=300&amp;theme-id=dark&amp;default-tab=html%2Cresult&amp;slug-hash=ExXjoEp&amp;user=TheOdinProjectExamples&amp;name=cp_embed_2" style="width: 100%; overflow:hidden; display:block;" title="CodePen Embed" loading="lazy" id="cp_embed_ExXjoEp"></iframe>
 
 # --question--
-    
+
 ## --text--
 
 What two attributes do images always need to have?
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-g.md b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-g.md
index 9a237595bc2..5377d31e50c 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-g.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-g.md
@@ -4,6 +4,7 @@ title: Links and Images Question G
 challengeType: 15
 dashedName: links-and-images-question-g
 ---
+
 # --description--
 
 Websites would be fairly boring if they could only display text. Luckily HTML provides a wide variety of elements for displaying all sorts of different media. The most widely used of these is the image element.
@@ -29,11 +30,11 @@ Finally add the image to the `index.html` file:
 ```html
 <body>
   <h1>Homepage</h1>
-	<a href="https://www.theodinproject.com/about">click me</a>
+    <a href="https://www.theodinproject.com/about">click me</a>
 
-	<a href="pages/about.html">About</a>
+    <a href="pages/about.html">About</a>
 
-	<img src="images/dog.jpg">
+    <img src="images/dog.jpg">
 </body>
 ```
 
@@ -70,7 +71,7 @@ This is how the The Odin Project logo example you used earlier looks with an alt
 <iframe allowfullscreen="true" allowpaymentrequest="true" allowtransparency="true" class="cp_embed_iframe " frameborder="0" height="300" width="100%" name="cp_embed_2" scrolling="no" src="https://codepen.io/TheOdinProjectExamples/embed/ExXjoEp?height=300&amp;theme-id=dark&amp;default-tab=html%2Cresult&amp;slug-hash=ExXjoEp&amp;user=TheOdinProjectExamples&amp;name=cp_embed_2" style="width: 100%; overflow:hidden; display:block;" title="CodePen Embed" loading="lazy" id="cp_embed_ExXjoEp"></iframe>
 
 # --question--
-    
+
 ## --text--
 
 How do you access a parent directory in a filepath?
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-h.md b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-h.md
index b1481d62db8..882eadb1ec0 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-h.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-links-and-images/links-and-images-question-h.md
@@ -4,6 +4,7 @@ title: Links and Images Question H
 challengeType: 15
 dashedName: links-and-images-question-h
 ---
+
 # --description--
 
 Websites would be fairly boring if they could only display text. Luckily HTML provides a wide variety of elements for displaying all sorts of different media. The most widely used of these is the image element.
@@ -29,11 +30,11 @@ Finally add the image to the `index.html` file:
 ```html
 <body>
   <h1>Homepage</h1>
-	<a href="https://www.theodinproject.com/about">click me</a>
+    <a href="https://www.theodinproject.com/about">click me</a>
 
-	<a href="pages/about.html">About</a>
+    <a href="pages/about.html">About</a>
 
-	<img src="images/dog.jpg">
+    <img src="images/dog.jpg">
 </body>
 ```
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-the-box-model/the-box-model-question-a.md b/curriculum/challenges/korean/16-the-odin-project/top-the-box-model/the-box-model-question-a.md
index d06ff16ecaf..e2882cdb454 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-the-box-model/the-box-model-question-a.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-the-box-model/the-box-model-question-a.md
@@ -4,6 +4,7 @@ title: The Box Model Question A
 challengeType: 15
 dashedName: the-box-model-question-a
 ---
+
 # --description--
 
 Being able to inspect and debug your HTML and CSS is critical to frontend development. This lesson will take us through the Chrome Dev Tools, which allow you to see detailed information about your elements and CSS rules, as well as assist you in finding and fixing problems in your code.
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-the-box-model/the-box-model-question-b.md b/curriculum/challenges/korean/16-the-odin-project/top-the-box-model/the-box-model-question-b.md
index b9e3ad47b74..c830844ef5e 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-the-box-model/the-box-model-question-b.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-the-box-model/the-box-model-question-b.md
@@ -4,6 +4,7 @@ title: The Box Model Question B
 challengeType: 15
 dashedName: the-box-model-question-b
 ---
+
 # --description--
 
 In the Elements pane, you can see the entire HTML structure of your page. You can click on any of the elements in this pane to select that specific element. Alternatively, you can click the blue-highlighted icon shown below on the left, and hover over any element on the page.
@@ -14,7 +15,7 @@ When an element is selected, the Styles tab will show all the currently applied
 
 ![Overwritten style](https://cdn.statically.io/gh/TheOdinProject/curriculum/f8fd38fc62578d8e8368f5303126215a492847f0/foundations/html_css/inspecting-html-and-css/imgs/03.png)
 
-# --question--    
+# --question--
 
 ## --text--
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-the-box-model/the-box-model-question-c.md b/curriculum/challenges/korean/16-the-odin-project/top-the-box-model/the-box-model-question-c.md
index f220a141c2f..c4dd04990bb 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-the-box-model/the-box-model-question-c.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-the-box-model/the-box-model-question-c.md
@@ -38,7 +38,7 @@ Inspector tab
 
 ---
 
-HTML structure view 
+HTML structure view
 
 
 ## --video-solution--
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-a.md b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-a.md
index a47106a18f1..33176924828 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-a.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-a.md
@@ -5,6 +5,7 @@ title: Working With Text Question A
 challengeType: 15
 dashedName: working-with-text-question-a
 ---
+
 # --description--
 
 What would you expect the following text to output on an HTML page?
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-b.md b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-b.md
index 337f4e5beb6..17d3c900359 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-b.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-b.md
@@ -4,6 +4,7 @@ title: Working With Text Question B
 challengeType: 15
 dashedName: working-with-text-question-b
 ---
+
 # --description--
 
 Headings are different from other HTML text elements: they are displayed larger and bolder than other text to signify that they are headings.
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-c.md b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-c.md
index f29debf19a8..da6e3dd4511 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-c.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-c.md
@@ -5,6 +5,7 @@ title: Working With Text Question C
 challengeType: 15
 dashedName: working-with-text-question-c
 ---
+
 # --description--
 
 The `<strong>` element makes text bold. It also semantically marks text as important; this affects tools, like screen readers, that users with visual impairments will rely on to use your website. The tone of voice on some screen readers will change to communicate the importance of the text within a `strong` element. To define a `strong` element you wrap text content in a `<strong>` tag.
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-d.md b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-d.md
index 6f2c6d2c827..e686b2698e0 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-d.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-d.md
@@ -4,6 +4,7 @@ title: Working With Text Question D
 challengeType: 15
 dashedName: working-with-text-question-d
 ---
+
 # --description--
 
 The `em` element makes text italic. It also semantically places emphasis on the text, which again may affect things like screen readers. To define an emphasized element you wrap text content in a `<em>` tag.
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-e.md b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-e.md
index d1ff1d22453..a0a7ba2fda9 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-e.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-e.md
@@ -4,6 +4,7 @@ title: Working With Text Question E
 challengeType: 15
 dashedName: working-with-text-question-e
 ---
+
 # --description--
 
 You may have noticed that in all the examples in this lesson you indent any elements that are within other elements. This is known as nesting elements.
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-f.md b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-f.md
index 3054e4ccf11..7d440cfab25 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-f.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-f.md
@@ -4,6 +4,7 @@ title: Working With Text Question F
 challengeType: 15
 dashedName: working-with-text-question-f
 ---
+
 # --description--
 
 You may have noticed that in all the examples in this lesson you indent any elements that are within other elements. This is known as nesting elements.
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-g.md b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-g.md
index 38cdbee144e..f61c895b934 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-g.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-g.md
@@ -4,11 +4,12 @@ title: Working With Text Question G
 challengeType: 15
 dashedName: working-with-text-question-g
 ---
+
 # --description--
 
 HTML comments are not visible to the browser; they allow us to comment on your code so that other developers or your future selves can read them and get some context about something that might not be clear in the code.
 
-Writing an HTML comment is simple: You just enclose the comment with `<!--` and `-->`tags. For example:
+Writing an HTML comment is simple: You just enclose the comment with `<!--` and `-->`tags. 예시:
 
 ```html
 <h1> View the html to see the hidden comments </h1>
@@ -25,7 +26,7 @@ Writing an HTML comment is simple: You just enclose the comment with `<!--` and
 To get some practice working with text in HTML, create a plain blog article page which uses different headings, uses paragraphs, and has some text in the paragraphs bolded and italicized. You can use [Lorem Ipsum](https://loremipsum.io) to generate dummy text, in place of real text as you build your sites.
 
 # --question--
-  
+
 ## --text--
 
 How do you create HTML comments?
@@ -36,7 +37,7 @@ How do you create HTML comments?
 
 ---
 
-`<!-- This is an HTML comment -->` 
+`<!-- This is an HTML comment -->`
 
 ---
 
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-h.md b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-h.md
index 698d3e75aa6..29feb0cf613 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-h.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-h.md
@@ -5,6 +5,7 @@ title: Working with Text Question H
 challengeType: 15
 dashedName: working-with-text-question-h
 ---
+
 # --description--
 
 If you want to have a list of items where the order doesn’t matter, like a shopping list of items that can be bought in any order, then you can use an unordered list.
@@ -40,9 +41,9 @@ Make an unordered list of places you’d like to visit someday.
 ---
 
 Make an ordered list of your all time top 5 favorite video games or movies.
-  
+
 # --question--
-  
+
 ## --text--
 
 What HTML tag is used to create an unordered list?
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-i.md b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-i.md
index 2b1f283f084..05765087c87 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-i.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-i.md
@@ -4,6 +4,7 @@ title: Working with Text Question I
 challengeType: 15
 dashedName: working-with-text-question-i
 ---
+
 # --description--
 
 If you want to have a list of items where the order doesn’t matter, like a shopping list of items that can be bought in any order, then you can use an unordered list.
diff --git a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-j.md b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-j.md
index 533cede4940..e496b6b12a8 100644
--- a/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-j.md
+++ b/curriculum/challenges/korean/16-the-odin-project/top-working-with-text/working-with-text-question-j.md
@@ -4,6 +4,7 @@ title: Working with Text Question J
 challengeType: 15
 dashedName: working-with-text-question-j
 ---
+
 # --description--
 
 If you want to have a list of items where the order doesn’t matter, like a shopping list of items that can be bought in any order, then you can use an unordered list.
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-15-lattice-paths.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-15-lattice-paths.md
index a3c9a068102..225eddd68e7 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-15-lattice-paths.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-15-lattice-paths.md
@@ -10,7 +10,7 @@ dashedName: problem-15-lattice-paths
 
 Starting in the top left corner of a 2×2 grid, and only being able to move to the right and down, there are exactly 6 routes to the bottom right corner.
 
-<img class="img-responsive center-block" alt="a diagram of 6 2 by 2 grids showing all the routes to the bottom right corner" src="https://cdn-media-1.freecodecamp.org/project-euler/1Atixoj.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="a diagram of 6 2 by 2 grids showing all the routes to the bottom right corner" src="https://cdn-media-1.freecodecamp.org/project-euler/1Atixoj.gif" style="background-color: white; padding: 10px;" />
 
 How many such routes are there through a given `gridSize`?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-35-circular-primes.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-35-circular-primes.md
index f87d29775fc..aaae9562bb0 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-35-circular-primes.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-35-circular-primes.md
@@ -14,7 +14,7 @@ There are thirteen such primes below 100: 2, 3, 5, 7, 11, 13, 17, 31, 37, 71, 73
 
 How many circular primes are there below `n`, whereas 100 ≤ `n` ≤ 1000000?
 
-**Note:**  
+**Note:**
 
 Circular primes individual rotation can exceed `n`.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-38-pandigital-multiples.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-38-pandigital-multiples.md
index 5ee26df1f5e..a1190e84f39 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-38-pandigital-multiples.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-38-pandigital-multiples.md
@@ -10,10 +10,8 @@ dashedName: problem-38-pandigital-multiples
 
 Take the number 192 and multiply it by each of 1, 2, and 3:
 
-$$\begin{align}
-  192 × 1 = 192\\\\
-  192 × 2 = 384\\\\
-  192 × 3 = 576\\\\
+$$\begin{align}   192 × 1 = 192\\\\
+  192 × 2 = 384\\\\   192 × 3 = 576\\\\
 \end{align}$$
 
 By concatenating each product we get the 1 to 9 pandigital, 192384576. We will call 192384576 the concatenated product of 192 and (1, 2, 3).
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-54-poker-hands.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-54-poker-hands.md
index cb51571ae47..b08e9a13bda 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-54-poker-hands.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-54-poker-hands.md
@@ -29,11 +29,11 @@ If two players have the same ranked hands then the rank made up of the highest v
 
 Consider the following five hands dealt to two players:
 
-| Hand               | Player 1                                                  | Player 2                                                   | Winner   |
-| ------------------ | --------------------------------------------------------- | ---------------------------------------------------------- | -------- |
-| <strong>1</strong> | 5H 5C 6S 7S KD <br> Pair of Fives                         | 2C 3S 8S 8D TD <br> Pair of Eights                         | Player 2 |
-| <strong>2</strong> | 5D 8C 9S JS AC <br> Highest card Ace                      | 2C 5C 7D 8S QH <br> Highest card Queen                     | Player 1 |
-| <strong>3</strong> | 2D 9C AS AH AC <br> Three Aces                            | 3D 6D 7D TD QD <br> Flush with Diamonds                    | Player 2 |
+| Hand                      | Player 1                                                              | Player 2                                                               | Winner   |
+| ------------------------- | --------------------------------------------------------------------- | ---------------------------------------------------------------------- | -------- |
+| <strong>1</strong> | 5H 5C 6S 7S KD <br> Pair of Fives                               | 2C 3S 8S 8D TD <br> Pair of Eights                               | Player 2 |
+| <strong>2</strong> | 5D 8C 9S JS AC <br> Highest card Ace                            | 2C 5C 7D 8S QH <br> Highest card Queen                           | Player 1 |
+| <strong>3</strong> | 2D 9C AS AH AC <br> Three Aces                                  | 3D 6D 7D TD QD <br> Flush with Diamonds                          | Player 2 |
 | <strong>4</strong> | 4D 6S 9H QH QC <br> Pair of Queens <br> Highest card Nine | 3D 6D 7H QD QS <br> Pair of Queens <br> Highest card Seven | Player 1 |
 | <strong>5</strong> | 2H 2D 4C 4D 4S <br> Full House <br> with Three Fours      | 3C 3D 3S 9S 9D <br> Full House <br> with Three Threes      | Player 1 |
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-61-cyclical-figurate-numbers.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-61-cyclical-figurate-numbers.md
index fd477f11acd..99fee7255e8 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-61-cyclical-figurate-numbers.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-61-cyclical-figurate-numbers.md
@@ -10,14 +10,14 @@ dashedName: problem-61-cyclical-figurate-numbers
 
 Triangle, square, pentagonal, hexagonal, heptagonal, and octagonal numbers are all figurate (polygonal) numbers and are generated by the following formulae:
 
-| Type of Number | Formula                      | Sequence              |
-| -------------- | ---------------------------- | --------------------- |
+| Type of Number | Formula                       | Sequence              |
+| -------------- | ----------------------------- | --------------------- |
 | Triangle       | $P_3(n) = \frac{n(n+1)}{2}$  | 1, 3, 6, 10, 15, ...  |
-| Square         | $P_4(n) = n^2$               | 1, 4, 9, 16, 25, ...  |
+| Square         | $P_4(n) = n^2$                | 1, 4, 9, 16, 25, ...  |
 | Pentagonal     | $P_5(n) = \frac{n(3n−1)}2$   | 1, 5, 12, 22, 35, ... |
-| Hexagonal      | $P_6(n) = n(2n−1)$           | 1, 6, 15, 28, 45, ... |
+| Hexagonal      | $P_6(n) = n(2n−1)$            | 1, 6, 15, 28, 45, ... |
 | Heptagonal     | $P_7(n) = \frac{n(5n−3)}{2}$ | 1, 7, 18, 34, 55, ... |
-| Octagonal      | $P_8(n) = n(3n−2)$           | 1, 8, 21, 40, 65, ... |
+| Octagonal      | $P_8(n) = n(3n−2)$            | 1, 8, 21, 40, 65, ... |
 
 The ordered set of three 4-digit numbers: 8128, 2882, 8281, has three interesting properties.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-68-magic-5-gon-ring.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-68-magic-5-gon-ring.md
index 9745f016a6b..7d8984cc7f8 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-68-magic-5-gon-ring.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-68-magic-5-gon-ring.md
@@ -10,7 +10,7 @@ dashedName: problem-68-magic-5-gon-ring
 
 Consider the following "magic" 3-gon ring, filled with the numbers 1 to 6, and each line adding to nine.
 
-<img class="img-responsive center-block" alt="a completed example of a 3-gon ring" src="https://cdn-media-1.freecodecamp.org/project-euler/3-gon-ring.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="a completed example of a 3-gon ring" src="https://cdn-media-1.freecodecamp.org/project-euler/3-gon-ring.png" style="background-color: white; padding: 10px;" />
 
 Working **clockwise**, and starting from the group of three with the numerically lowest external node (4,3,2 in this example), each solution can be described uniquely. For example, the above solution can be described by the set: 4,3,2; 6,2,1; 5,1,3.
 
@@ -35,7 +35,7 @@ By concatenating each group it is possible to form 9-digit strings; the maximum
 
 Using the numbers 1 to 10, and depending on arrangements, it is possible to form 16- and 17-digit strings. What is the maximum **16-digit** string for a "magic" 5-gon ring?
 
-<img class="img-responsive center-block" alt="a blank diagram of a 5-gon ring" src="https://cdn-media-1.freecodecamp.org/project-euler/5-gon-ring.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="a blank diagram of a 5-gon ring" src="https://cdn-media-1.freecodecamp.org/project-euler/5-gon-ring.png" style="background-color: white; padding: 10px;" />
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-74-digit-factorial-chains.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-74-digit-factorial-chains.md
index 372b5c50601..0b94dee88dd 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-74-digit-factorial-chains.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-74-digit-factorial-chains.md
@@ -14,18 +14,14 @@ $$1! + 4! + 5! = 1 + 24 + 120 = 145$$
 
 Perhaps less well known is 169, in that it produces the longest chain of numbers that link back to 169; it turns out that there are only three such loops that exist:
 
-$$\begin{align}
-&169 → 363601 → 1454 → 169\\\\
-&871 → 45361 → 871\\\\
-&872 → 45362 → 872\\\\
+$$\begin{align} &169 → 363601 → 1454 → 169\\\\
+&871 → 45361 → 871\\\\ &872 → 45362 → 872\\\\
 \end{align}$$
 
 It is not difficult to prove that EVERY starting number will eventually get stuck in a loop. For example,
 
-$$\begin{align}
-&69 → 363600 → 1454 → 169 → 363601\\ (→ 1454)\\\\
-&78 → 45360 → 871 → 45361\\ (→ 871)\\\\
-&540 → 145\\ (→ 145)\\\\
+$$\begin{align} &69 → 363600 → 1454 → 169 → 363601\\ (→ 1454)\\\\
+&78 → 45360 → 871 → 45361\\ (→ 871)\\\\ &540 → 145\\ (→ 145)\\\\
 \end{align}$$
 
 Starting with 69 produces a chain of five non-repeating terms, but the longest non-repeating chain with a starting number below one million is sixty terms.
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-78-coin-partitions.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-78-coin-partitions.md
index 26428a8ccaf..2d3113c788a 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-78-coin-partitions.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-78-coin-partitions.md
@@ -91,7 +91,7 @@ function coinPartitions(divisor) {
     for (let j = 0; pentagonalNumbers[j] <= i; j++) {
       partitions[i] += partitions[i - pentagonalNumbers[j]] * signs[j % 4];
     }
-    
+
     partitions[i] = partitions[i] % divisor;
     if (partitions[i] < 0) partitions[i] += divisor; // positive mod
     // return when found
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-81-path-sum-two-ways.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-81-path-sum-two-ways.md
index baae4061caf..5fe3982048f 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-81-path-sum-two-ways.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-81-path-sum-two-ways.md
@@ -10,13 +10,9 @@ dashedName: problem-81-path-sum-two-ways
 
 In the 5 by 5 matrix below, the minimal path sum from the top left to the bottom right, by **only moving to the right and down**, is indicated in bold red and is equal to `2427`.
 
-  $$\begin{pmatrix}
-  \color{red}{131} & 673 & 234 & 103 & 18\\\\
-  \color{red}{201} & \color{red}{96} & \color{red}{342} & 965 & 150\\\\
-  630 & 803 & \color{red}{746} & \color{red}{422} & 111\\\\
-  537 & 699 & 497 & \color{red}{121} & 956\\\\
-  805 & 732 & 524 & \color{red}{37} & \color{red}{331}
-  \end{pmatrix}$$
+  $$\begin{pmatrix}   \color{red}{131} & 673 & 234 & 103 & 18\\\\
+  \color{red}{201} & \color{red}{96} & \color{red}{342} & 965 & 150\\\\   630 & 803 & \color{red}{746} & \color{red}{422} & 111\\\\
+  537 & 699 & 497 & \color{red}{121} & 956\\\\ 805 & 732 & 524 & \color{red}{37} & \color{red}{331} \end{pmatrix}$$
 
 Find the minimal path sum from the top left to the bottom right by only moving right and down in `matrix`, a 2D array representing a matrix. The maximum matrix size used in the tests will be 80 by 80.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-82-path-sum-three-ways.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-82-path-sum-three-ways.md
index 1cad1c0e006..0895540d468 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-82-path-sum-three-ways.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-82-path-sum-three-ways.md
@@ -12,13 +12,9 @@ dashedName: problem-82-path-sum-three-ways
 
 The minimal path sum in the 5 by 5 matrix below, by starting in any cell in the left column and finishing in any cell in the right column, and only moving up, down, and right, is indicated in red and bold; the sum is equal to `994`.
 
-  $$\begin{pmatrix}
-  131 & 673 & \color{red}{234} & \color{red}{103} & \color{red}{18}\\\\
-  \color{red}{201} & \color{red}{96} & \color{red}{342} & 965 & 150\\\\
-  630 & 803 & 746 & 422 & 111\\\\
-  537 & 699 & 497 & 121 & 956\\\\
-  805 & 732 & 524 & 37 & 331
-  \end{pmatrix}$$
+  $$\begin{pmatrix}   131 & 673 & \color{red}{234} & \color{red}{103} & \color{red}{18}\\\\
+  \color{red}{201} & \color{red}{96} & \color{red}{342} & 965 & 150\\\\   630 & 803 & 746 & 422 & 111\\\\
+  537 & 699 & 497 & 121 & 956\\\\ 805 & 732 & 524 & 37 & 331 \end{pmatrix}$$
 
 Find the minimal path sum from the left column to the right column in `matrix`, a 2D array representing a matrix. The maximum matrix size used in tests will be 80 by 80.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-83-path-sum-four-ways.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-83-path-sum-four-ways.md
index 5e695983ce8..8d3b60e0c0b 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-83-path-sum-four-ways.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-83-path-sum-four-ways.md
@@ -12,13 +12,9 @@ dashedName: problem-83-path-sum-four-ways
 
 In the 5 by 5 matrix below, the minimal path sum from the top left to the bottom right, by moving left, right, up, and down, is indicated in bold red and is equal to `2297`.
 
-  $$\begin{pmatrix}
-  \color{red}{131} & 673 & \color{red}{234} & \color{red}{103} & \color{red}{18}\\\\
-  \color{red}{201} & \color{red}{96} & \color{red}{342} & 965 & \color{red}{150}\\\\
-  630 & 803 & 746 & \color{red}{422} & \color{red}{111}\\\\
-  537 & 699 & 497 & \color{red}{121} & 956\\\\
-  805 & 732 & 524 & \color{red}{37} & \color{red}{331}
-  \end{pmatrix}$$
+  $$\begin{pmatrix}   \color{red}{131} & 673 & \color{red}{234} & \color{red}{103} & \color{red}{18}\\\\
+  \color{red}{201} & \color{red}{96} & \color{red}{342} & 965 & \color{red}{150}\\\\   630 & 803 & 746 & \color{red}{422} & \color{red}{111}\\\\
+  537 & 699 & 497 & \color{red}{121} & 956\\\\ 805 & 732 & 524 & \color{red}{37} & \color{red}{331} \end{pmatrix}$$
 
 Find the minimal path sum from the top left to the bottom right by moving left, right, up, and down in `matrix`, a 2D array representing a matrix. The maximum matrix size used in tests will be 80 by 80.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-85-counting-rectangles.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-85-counting-rectangles.md
index 9de90d942a0..eafbccb8aee 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-85-counting-rectangles.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-85-counting-rectangles.md
@@ -10,7 +10,7 @@ dashedName: problem-85-counting-rectangles
 
 By counting carefully it can be seen that a rectangular grid measuring 3 by 2 contains eighteen rectangles:
 
-<img class="img-responsive center-block" alt="a diagram of the different rectangles found within a 3 by 2 rectangular grid" src="https://cdn-media-1.freecodecamp.org/project-euler/counting-rectangles.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="a diagram of the different rectangles found within a 3 by 2 rectangular grid" src="https://cdn-media-1.freecodecamp.org/project-euler/counting-rectangles.png" style="background-color: white; padding: 10px;" />
 
 Although there may not exists a rectangular grid that contains exactly `n` rectangles, find the area of the grid with the nearest solution.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-86-cuboid-route.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-86-cuboid-route.md
index fc4762bb6d8..39a860bd794 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-86-cuboid-route.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-86-cuboid-route.md
@@ -10,7 +10,7 @@ dashedName: problem-86-cuboid-route
 
 A spider, S, sits in one corner of a cuboid room, measuring 6 by 5 by 3, and a fly, F, sits in the opposite corner. By travelling on the surfaces of the room the shortest "straight line" distance from S to F is 10 and the path is shown on the diagram.
 
-<img class="img-responsive center-block" alt="a diagram of a spider and fly's path from one corner of a cuboid room to the opposite corner" src="https://cdn-media-1.freecodecamp.org/project-euler/cuboid-route.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="a diagram of a spider and fly's path from one corner of a cuboid room to the opposite corner" src="https://cdn-media-1.freecodecamp.org/project-euler/cuboid-route.png" style="background-color: white; padding: 10px;" />
 
 However, there are up to three "shortest" path candidates for any given cuboid and the shortest route doesn't always have integer length.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-90-cube-digit-pairs.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-90-cube-digit-pairs.md
index cd56e94fe93..3e1206b4c4f 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-90-cube-digit-pairs.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-90-cube-digit-pairs.md
@@ -12,7 +12,7 @@ Each of the six faces on a cube has a different digit (0 to 9) written on it; th
 
 For example, the square number 64 could be formed:
 
-<img class="img-responsive center-block" alt="two cubes, one with the number 6 and the other with number 4" src="https://cdn-media-1.freecodecamp.org/project-euler/cube-digit-pairs.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="two cubes, one with the number 6 and the other with number 4" src="https://cdn-media-1.freecodecamp.org/project-euler/cube-digit-pairs.png" style="background-color: white; padding: 10px;" />
 
 In fact, by carefully choosing the digits on both cubes it is possible to display all of the square numbers below one-hundred: 01, 04, 09, 16, 25, 36, 49, 64, and 81.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-91-right-triangles-with-integer-coordinates.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-91-right-triangles-with-integer-coordinates.md
index 3343541eda3..27cb226d3da 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-91-right-triangles-with-integer-coordinates.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-91-right-triangles-with-integer-coordinates.md
@@ -10,11 +10,11 @@ dashedName: problem-91-right-triangles-with-integer-coordinates
 
 The points ${P}(x_1, y_1)$ and ${Q}(x_2, y_2)$ are plotted at integer coordinates and are joined to the origin, ${O}(0, 0)$, to form ${\Delta}OPQ$.
 
-<img class="img-responsive center-block" alt="a graph plotting points P (x_1, y_1) and Q(x_2, y_2) at integer coordinates that are joined to the origin O (0, 0)" src="https://cdn-media-1.freecodecamp.org/project-euler/right-triangles-integer-coordinates-1.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="a graph plotting points P (x_1, y_1) and Q(x_2, y_2) at integer coordinates that are joined to the origin O (0, 0)" src="https://cdn-media-1.freecodecamp.org/project-euler/right-triangles-integer-coordinates-1.png" style="background-color: white; padding: 10px;" />
 
 There are exactly fourteen triangles containing a right angle that can be formed when each coordinate lies between 0 and 2 inclusive; that is, $0 ≤ x_1, y_1, x_2, y_2 ≤ 2$.
 
-<img class="img-responsive center-block" alt="a diagram showing the 14 triangles containing a right angle that can be formed when each coordinate is between 0 and 2" src="https://cdn-media-1.freecodecamp.org/project-euler/right-triangles-integer-coordinates-2.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="a diagram showing the 14 triangles containing a right angle that can be formed when each coordinate is between 0 and 2" src="https://cdn-media-1.freecodecamp.org/project-euler/right-triangles-integer-coordinates-2.png" style="background-color: white; padding: 10px;" />
 
 Given that $0 ≤ x_1, y_1, x_2, y_2 ≤ limit$, how many right triangles can be formed?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-92-square-digit-chains.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-92-square-digit-chains.md
index 6b5f3bdd45d..c560f06847c 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-92-square-digit-chains.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-92-square-digit-chains.md
@@ -12,10 +12,8 @@ A number chain is created by continuously adding the square of the digits in a n
 
 For example,
 
-$$\begin{align}
-  & 44 → 32 → 13 → 10 → \boldsymbol{1} → \boldsymbol{1}\\\\
-  & 85 → \boldsymbol{89} → 145 → 42 → 20 → 4 → 16 → 37 → 58 → \boldsymbol{89}\\\\
-\end{align}$$
+$$\begin{align}   & 44 → 32 → 13 → 10 → \boldsymbol{1} → \boldsymbol{1}\\\\
+  & 85 → \boldsymbol{89} → 145 → 42 → 20 → 4 → 16 → 37 → 58 → \boldsymbol{89}\\\\ \end{align}$$
 
 Therefore any chain that arrives at 1 or 89 will become stuck in an endless loop. What is most amazing is that EVERY starting number will eventually arrive at 1 or 89.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-95-amicable-chains.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-95-amicable-chains.md
index 66805b9940a..fe2d422a206 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-95-amicable-chains.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-1-to-100/problem-95-amicable-chains.md
@@ -14,9 +14,7 @@ Interestingly the sum of the proper divisors of 220 is 284 and the sum of the pr
 
 Perhaps less well known are longer chains. For example, starting with 12496, we form a chain of five numbers:
 
-$$
-  12496 → 14288 → 15472 → 14536 → 14264 \\,(→ 12496 → \cdots)
-$$
+$$ 12496 → 14288 → 15472 → 14536 → 14264 \\,(→ 12496 → \cdots) $$
 
 Since this chain returns to its starting point, it is called an amicable chain.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-101-optimum-polynomial.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-101-optimum-polynomial.md
index a29433afa01..803f95dc33e 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-101-optimum-polynomial.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-101-optimum-polynomial.md
@@ -20,12 +20,9 @@ As a basis, if we were only given the first term of sequence, it would be most s
 
 Hence we obtain the following OPs for the cubic sequence:
 
-$$\begin{array}{ll}
-  OP(1, n) = 1          & 1, {\color{red}1}, 1, 1, \ldots     \\\\
-  OP(2, n) = 7n−6       & 1, 8, {\color{red}{15}}, \ldots     \\\\
-  OP(3, n) = 6n^2−11n+6 & 1, 8, 27, {\color{red}{58}}, \ldots \\\\
-  OP(4, n) = n^3        & 1, 8, 27, 64, 125, \ldots
-\end{array}$$
+$$\begin{array}{ll}   OP(1, n) = 1          & 1, {\color{red}1}, 1, 1, \ldots     \\\\
+  OP(2, n) = 7n−6       & 1, 8, {\color{red}{15}}, \ldots     \\\\   OP(3, n) = 6n^2−11n+6 & 1, 8, 27, {\color{red}{58}}, \ldots \\\\
+  OP(4, n) = n^3        & 1, 8, 27, 64, 125, \ldots \end{array}$$
 
 Clearly no BOPs exist for k ≥ 4. By considering the sum of FITs generated by the BOPs (indicated in $\color{red}{red}$ above), we obtain 1 + 15 + 58 = 74. Consider the following tenth degree polynomial generating function:
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-103-special-subset-sums-optimum.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-103-special-subset-sums-optimum.md
index 37ef60cd908..bf85eef1f76 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-103-special-subset-sums-optimum.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-103-special-subset-sums-optimum.md
@@ -15,12 +15,9 @@ Let $S(A)$ represent the sum of elements in set A of size n. We shall call it a
 
 If $S(A)$ is minimised for a given n, we shall call it an optimum special sum set. The first five optimum special sum sets are given below.
 
-$$\begin{align}
-  & n = 1: \\{1\\} \\\\
-  & n = 2: \\{1, 2\\} \\\\
-  & n = 3: \\{2, 3, 4\\} \\\\
-  & n = 4: \\{3, 5, 6, 7\\} \\\\
-  & n = 5: \\{6, 9, 11, 12, 13\\} \\\\
+$$\begin{align}   & n = 1: \\{1\\} \\\\
+  & n = 2: \\{1, 2\\} \\\\   & n = 3: \\{2, 3, 4\\} \\\\
+  & n = 4: \\{3, 5, 6, 7\\} \\\\   & n = 5: \\{6, 9, 11, 12, 13\\} \\\\
 \end{align}$$
 
 It seems that for a given optimum set, $A = \\{a_1, a_2, \ldots, a_n\\}$, the next optimum set is of the form $B = \\{b, a_1 + b, a_2 + b, \ldots, a_n + b\\}$, where b is the "middle" element on the previous row.
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-107-minimal-network.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-107-minimal-network.md
index 75338badbfa..3b69363096d 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-107-minimal-network.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-107-minimal-network.md
@@ -10,12 +10,12 @@ dashedName: problem-107-minimal-network
 
 The following undirected network consists of seven vertices and twelve edges with a total weight of 243.
 
-<img class="img-responsive center-block" alt="Network with seven vertices and twelve edges" src="https://cdn.freecodecamp.org/curriculum/project-euler/minimal-network-1.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="Network with seven vertices and twelve edges" src="https://cdn.freecodecamp.org/curriculum/project-euler/minimal-network-1.png" style="background-color: white; padding: 10px;" />
 
 The same network can be represented by the matrix below.
 
 |   | A  | B  | C  | D  | E  | F  | G  |
-|---|----|----|----|----|----|----|----|
+| - | -- | -- | -- | -- | -- | -- | -- |
 | A | -  | 16 | 12 | 21 | -  | -  | -  |
 | B | 16 | -  | -  | 17 | 20 | -  | -  |
 | C | 12 | -  | -  | 28 | -  | 31 | -  |
@@ -27,7 +27,7 @@ The same network can be represented by the matrix below.
 
 However, it is possible to optimise the network by removing some edges and still ensure that all points on the network remain connected. The network which achieves the maximum saving is shown below. It has a weight of 93, representing a saving of 243 − 93 = 150 from the original network.
 
-<img class="img-responsive center-block" alt="Network with seven vertices and left six edges: AB, BD, CA, DE, DF, EG" src="https://cdn.freecodecamp.org/curriculum/project-euler/minimal-network-2.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="Network with seven vertices and left six edges: AB, BD, CA, DE, DF, EG" src="https://cdn.freecodecamp.org/curriculum/project-euler/minimal-network-2.png" style="background-color: white; padding: 10px;" />
 
 Using `network`, an 2D array representing network in matrix form, find the maximum saving which can be achieved by removing redundant edges whilst ensuring that the network remains connected. Vertices not having connection will be represented with `-1`.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-108-diophantine-reciprocals-i.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-108-diophantine-reciprocals-i.md
index a4f34e849ee..56fbe532238 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-108-diophantine-reciprocals-i.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-108-diophantine-reciprocals-i.md
@@ -14,13 +14,9 @@ $$\frac{1}{x} + \frac{1}{y} = \frac{1}{n}$$
 
 For `n` = 4 there are exactly three distinct solutions:
 
-$$\begin{align}
-  & \frac{1}{5} + \frac{1}{20} = \frac{1}{4}\\\\
-  \\\\
-  & \frac{1}{6} + \frac{1}{12} = \frac{1}{4}\\\\
-  \\\\
-  & \frac{1}{8} + \frac{1}{8} = \frac{1}{4}
-\end{align}$$
+$$\begin{align}   & \frac{1}{5} + \frac{1}{20} = \frac{1}{4}\\\\
+  \\\\   & \frac{1}{6} + \frac{1}{12} = \frac{1}{4}\\\\
+  \\\\ & \frac{1}{8} + \frac{1}{8} = \frac{1}{4} \end{align}$$
 
 What is the least value of `n` for which the number of distinct solutions exceeds one-thousand?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-109-darts.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-109-darts.md
index 68a417c914d..5064f7e146c 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-109-darts.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-109-darts.md
@@ -10,7 +10,7 @@ dashedName: problem-109-darts
 
 In the game of darts a player throws three darts at a target board which is split into twenty equal sized sections numbered one to twenty.
 
-<img class="img-responsive center-block" alt="Darts board" src="https://cdn.freecodecamp.org/curriculum/project-euler/darts.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="Darts board" src="https://cdn.freecodecamp.org/curriculum/project-euler/darts.png" style="background-color: white; padding: 10px;" />
 
 The score of a dart is determined by the number of the region that the dart lands in. A dart landing outside the red/green outer ring scores zero. The black and cream regions inside this ring represent single scores. However, the red/green outer ring and middle ring score double and treble scores respectively.
 
@@ -20,19 +20,12 @@ There are many variations of rules but in the most popular game the players will
 
 When a player is able to finish on their current score it is called a "checkout" and the highest checkout is 170: T20 T20 D25 (two treble 20s and double bull). There are exactly eleven distinct ways to checkout on a score of 6:
 
-$$\begin{array}
-  \text{D3} &    &    \\\\
-  D1        & D2 &    \\\\
-  S2        & D2 &    \\\\
-  D2        & D1 &    \\\\
-  S4        & D1 &    \\\\
-  S1        & S1 & D2 \\\\
-  S1        & T1 & D1 \\\\
-  S1        & S3 & D1 \\\\
-  D1        & D1 & D1 \\\\
-  D1        & S2 & D1 \\\\
-  S2        & S2 & D1
-\end{array}$$
+$$\begin{array}   \text{D3} &    &    \\\\
+  D1        & D2 &    \\\\   S2        & D2 &    \\\\
+  D2        & D1 &    \\\\   S4        & D1 &    \\\\
+  S1        & S1 & D2 \\\\   S1        & T1 & D1 \\\\
+  S1        & S3 & D1 \\\\   D1        & D1 & D1 \\\\
+  D1        & S2 & D1 \\\\ S2        & S2 & D1 \end{array}$$
 
 Note that D1 D2 is considered different from D2 D1 as they finish on different doubles. However, the combination S1 T1 D1 is considered the same as T1 S1 D1. In addition, we shall not include misses in considering combinations; for example, D3 is the same as 0 D3 and 0 0 D3. Incredibly there are 42336 distinct ways of checking out in total. How many distinct ways can a player checkout with a score less than 100?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-111-primes-with-runs.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-111-primes-with-runs.md
index fee32260b93..7f22fbffb6c 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-111-primes-with-runs.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-111-primes-with-runs.md
@@ -19,7 +19,7 @@ So $M(4, 1) = 3$ is the maximum number of repeated digits for a 4-digit prime wh
 In the same way we obtain the following results for 4-digit primes.
 
 | Digit, d | $M(4, d)$ | $N(4, d)$ | $S(4, d)$ |
-|----------|-----------|-----------|-----------|
+| -------- | --------- | --------- | --------- |
 | 0        | 2         | 13        | 67061     |
 | 1        | 3         | 9         | 22275     |
 | 2        | 3         | 1         | 2221      |
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-114-counting-block-combinations-i.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-114-counting-block-combinations-i.md
index ff84a9bf090..3e1b2f85927 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-114-counting-block-combinations-i.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-114-counting-block-combinations-i.md
@@ -10,7 +10,7 @@ dashedName: problem-114-counting-block-combinations-i
 
 A row measuring seven units in length has red blocks with a minimum length of three units placed on it, such that any two red blocks (which are allowed to be different lengths) are separated by at least one black square. There are exactly seventeen ways of doing this.
 
-<img class="img-responsive center-block" alt="Possible ways of placing block with a minimum length of three units, on a row with length of seven units" src="https://cdn.freecodecamp.org/curriculum/project-euler/counting-block-combinations-i.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="Possible ways of placing block with a minimum length of three units, on a row with length of seven units" src="https://cdn.freecodecamp.org/curriculum/project-euler/counting-block-combinations-i.png" style="background-color: white; padding: 10px;" />
 
 How many ways can a row measuring fifty units in length be filled?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-116-red-green-or-blue-tiles.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-116-red-green-or-blue-tiles.md
index 15fc613e0db..b0b1969a3df 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-116-red-green-or-blue-tiles.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-116-red-green-or-blue-tiles.md
@@ -12,15 +12,15 @@ A row of five black square tiles is to have a number of its tiles replaced with
 
 If red tiles are chosen there are exactly seven ways this can be done.
 
-<img class="img-responsive center-block" alt="Possible ways to placing red oblong on a row with length of five units" src="https://cdn.freecodecamp.org/curriculum/project-euler/red-green-or-blue-tiles-1.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="Possible ways to placing red oblong on a row with length of five units" src="https://cdn.freecodecamp.org/curriculum/project-euler/red-green-or-blue-tiles-1.png" style="background-color: white; padding: 10px;" />
 
 If green tiles are chosen there are three ways.
 
-<img class="img-responsive center-block" alt="Possible ways of placing green oblong on a row with length of five units" src="https://cdn.freecodecamp.org/curriculum/project-euler/red-green-or-blue-tiles-2.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="Possible ways of placing green oblong on a row with length of five units" src="https://cdn.freecodecamp.org/curriculum/project-euler/red-green-or-blue-tiles-2.png" style="background-color: white; padding: 10px;" />
 
 And if blue tiles are chosen there are two ways.
 
-<img class="img-responsive center-block" alt="Possible ways of placing blue oblong on a row with length of five units" src="https://cdn.freecodecamp.org/curriculum/project-euler/red-green-or-blue-tiles-3.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="Possible ways of placing blue oblong on a row with length of five units" src="https://cdn.freecodecamp.org/curriculum/project-euler/red-green-or-blue-tiles-3.png" style="background-color: white; padding: 10px;" />
 
 Assuming that colors cannot be mixed there are 7 + 3 + 2 = 12 ways of replacing the black tiles in a row measuring five units in length. How many different ways can the black tiles in a row measuring fifty units in length be replaced if colors cannot be mixed and at least one colored tile must be used?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-117-red-green-and-blue-tiles.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-117-red-green-and-blue-tiles.md
index 65a9d3749e7..4a4873aac95 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-117-red-green-and-blue-tiles.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-117-red-green-and-blue-tiles.md
@@ -10,7 +10,7 @@ dashedName: problem-117-red-green-and-blue-tiles
 
 Using a combination of black square tiles and oblong tiles chosen from: red tiles measuring two units, green tiles measuring three units, and blue tiles measuring four units, it is possible to tile a row measuring five units in length in exactly fifteen different ways.
 
-<img class="img-responsive center-block" alt="Possible ways of placing red, green and blue oblongs on a row with length of five units" src="https://cdn.freecodecamp.org/curriculum/project-euler/red-green-and-blue-tiles.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="Possible ways of placing red, green and blue oblongs on a row with length of five units" src="https://cdn.freecodecamp.org/curriculum/project-euler/red-green-and-blue-tiles.png" style="background-color: white; padding: 10px;" />
 
 How many ways can a row measuring fifty units in length be tiled?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-122-efficient-exponentiation.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-122-efficient-exponentiation.md
index 0af7c5bd172..4fa15980a0d 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-122-efficient-exponentiation.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-122-efficient-exponentiation.md
@@ -14,24 +14,16 @@ $$n × n × \ldots × n = n^{15}$$
 
 But using a "binary" method you can compute it in six multiplications:
 
-$$\begin{align}
-  & n × n = n^2\\\\
-  & n^2 × n^2 = n^4\\\\
-  & n^4 × n^4 = n^8\\\\
-  & n^8 × n^4 = n^{12}\\\\
-  & n^{12} × n^2 = n^{14}\\\\
-  & n^{14} × n = n^{15}
-\end{align}$$
+$$\begin{align}   & n × n = n^2\\\\
+  & n^2 × n^2 = n^4\\\\   & n^4 × n^4 = n^8\\\\
+  & n^8 × n^4 = n^{12}\\\\   & n^{12} × n^2 = n^{14}\\\\
+  & n^{14} × n = n^{15} \end{align}$$
 
 However it is yet possible to compute it in only five multiplications:
 
-$$\begin{align}
-  & n × n = n^2\\\\
-  & n^2 × n = n^3\\\\
-  & n^3 × n^3 = n^6\\\\
-  & n^6 × n^6 = n^{12}\\\\
-  & n^{12} × n^3 = n^{15}
-\end{align}$$
+$$\begin{align}   & n × n = n^2\\\\
+  & n^2 × n = n^3\\\\   & n^3 × n^3 = n^6\\\\
+  & n^6 × n^6 = n^{12}\\\\ & n^{12} × n^3 = n^{15} \end{align}$$
 
 We shall define $m(k)$ to be the minimum number of multiplications to compute $n^k$; for example $m(15) = 5$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-126-cuboid-layers.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-126-cuboid-layers.md
index 1f7725c7baf..d089c18aff0 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-126-cuboid-layers.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-126-cuboid-layers.md
@@ -10,7 +10,7 @@ dashedName: problem-126-cuboid-layers
 
 The minimum number of cubes to cover every visible face on a cuboid measuring 3 x 2 x 1 is twenty-two.
 
-<img class="img-responsive center-block" alt="3x2x1 cuboid covered by twenty-two 1x1x1 cubes" src="https://cdn.freecodecamp.org/curriculum/project-euler/cuboid-layers.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="3x2x1 cuboid covered by twenty-two 1x1x1 cubes" src="https://cdn.freecodecamp.org/curriculum/project-euler/cuboid-layers.png" style="background-color: white; padding: 10px;" />
 
 If we add a second layer to this solid it would require forty-six cubes to cover every visible face, the third layer would require seventy-eight cubes, and the fourth layer would require one-hundred and eighteen cubes to cover every visible face.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-128-hexagonal-tile-differences.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-128-hexagonal-tile-differences.md
index c00be08b597..e402ff347c5 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-128-hexagonal-tile-differences.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-128-hexagonal-tile-differences.md
@@ -12,7 +12,7 @@ A hexagonal tile with number 1 is surrounded by a ring of six hexagonal tiles, s
 
 New rings are added in the same fashion, with the next rings being numbered 8 to 19, 20 to 37, 38 to 61, and so on. The diagram below shows the first three rings.
 
-<img class="img-responsive center-block" alt="three first rings of arranged hexagonal tiles with numbers 1 to 37, and with highlighted tiles 8 and 17" src="https://cdn.freecodecamp.org/curriculum/project-euler/hexagonal-tile-differences.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="three first rings of arranged hexagonal tiles with numbers 1 to 37, and with highlighted tiles 8 and 17" src="https://cdn.freecodecamp.org/curriculum/project-euler/hexagonal-tile-differences.png" style="background-color: white; padding: 10px;" />
 
 By finding the difference between tile $n$ and each of its six neighbours we shall define $PD(n)$ to be the number of those differences which are prime.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-137-fibonacci-golden-nuggets.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-137-fibonacci-golden-nuggets.md
index c2d8829a280..b700dba62d0 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-137-fibonacci-golden-nuggets.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-137-fibonacci-golden-nuggets.md
@@ -14,18 +14,15 @@ For this problem we shall be interested in values of $x$ for which $A_{F}(x)$ is
 
 Surprisingly
 
-$$\begin{align}
-A_F(\frac{1}{2}) & = (\frac{1}{2}) × 1 + {(\frac{1}{2})}^2 × 1 + {(\frac{1}{2})}^3 × 2 + {(\frac{1}{2})}^4 × 3 + {(\frac{1}{2})}^5 × 5 + \cdots \\\\
-                 & = \frac{1}{2} + \frac{1}{4} + \frac{2}{8} + \frac{3}{16} + \frac{5}{32} + \cdots \\\\
-                 & = 2
-\end{align}$$
+$$\begin{align} A_F(\frac{1}{2}) & = (\frac{1}{2}) × 1 + {(\frac{1}{2})}^2 × 1 + {(\frac{1}{2})}^3 × 2 + {(\frac{1}{2})}^4 × 3 + {(\frac{1}{2})}^5 × 5 + \cdots \\\\
+                 & = \frac{1}{2} + \frac{1}{4} + \frac{2}{8} + \frac{3}{16} + \frac{5}{32} + \cdots \\\\ & = 2 \end{align}$$
 
 The corresponding values of $x$ for the first five natural numbers are shown below.
 
-| $x$                       | $A_F(x)$ |
-|---------------------------|----------|
-| $\sqrt{2} − 1$            | $1$      |
-| $\frac{1}{2}$             | $2$      |
+| $x$                         | $A_F(x)$ |
+| --------------------------- | -------- |
+| $\sqrt{2} − 1$             | $1$      |
+| $\frac{1}{2}$              | $2$      |
 | $\frac{\sqrt{13} − 2}{3}$ | $3$      |
 | $\frac{\sqrt{89} − 5}{8}$ | $4$      |
 | $\frac{\sqrt{34} − 3}{5}$ | $5$      |
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-138-special-isosceles-triangles.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-138-special-isosceles-triangles.md
index e65f3e8f573..6391b7523c4 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-138-special-isosceles-triangles.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-138-special-isosceles-triangles.md
@@ -10,7 +10,7 @@ dashedName: problem-138-special-isosceles-triangles
 
 Consider the isosceles triangle with base length, $b = 16$, and legs, $L = 17$.
 
-<img class="img-responsive center-block" alt="isosceles triangle with edges named as L - two edges with the same length and base of the triangle as b; and height of the triangle - h from the base of the triangle to the angle between L edges" src="https://cdn.freecodecamp.org/curriculum/project-euler/special-isosceles-triangles.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="isosceles triangle with edges named as L - two edges with the same length and base of the triangle as b; and height of the triangle - h from the base of the triangle to the angle between L edges" src="https://cdn.freecodecamp.org/curriculum/project-euler/special-isosceles-triangles.png" style="background-color: white; padding: 10px;" />
 
 By using the Pythagorean theorem, it can be seen that the height of the triangle, $h = \sqrt{{17}^2 − 8^2} = 15$, which is one less than the base length.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-139-pythagorean-tiles.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-139-pythagorean-tiles.md
index ad26713611a..19f12579cb2 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-139-pythagorean-tiles.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-139-pythagorean-tiles.md
@@ -12,7 +12,7 @@ Let (a, b, c) represent the three sides of a right angle triangle with integral
 
 For example, (3, 4, 5) triangles can be placed together to form a 5 by 5 square with a 1 by 1 hole in the middle and it can be seen that the 5 by 5 square can be tiled with twenty-five 1 by 1 squares.
 
-<img class="img-responsive center-block" alt="two 5 x 5 squares: one with four 3x4x5 triangles placed to create 1x1 hole in the middle; second with twenty-five 1x1 squares" src="https://cdn.freecodecamp.org/curriculum/project-euler/pythagorean-tiles.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="two 5 x 5 squares: one with four 3x4x5 triangles placed to create 1x1 hole in the middle; second with twenty-five 1x1 squares" src="https://cdn.freecodecamp.org/curriculum/project-euler/pythagorean-tiles.png" style="background-color: white; padding: 10px;" />
 
 However, if (5, 12, 13) triangles were used, the hole would measure 7 by 7. These 7 by 7 squares could not be used to tile the 13 by 13 square.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-140-modified-fibonacci-golden-nuggets.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-140-modified-fibonacci-golden-nuggets.md
index 0b32413e499..bdd6612a63c 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-140-modified-fibonacci-golden-nuggets.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-140-modified-fibonacci-golden-nuggets.md
@@ -14,13 +14,13 @@ For this problem we shall be concerned with values of $x$ for which $A_G(x)$ is
 
 The corresponding values of $x$ for the first five natural numbers are shown below.
 
-| $x$                         | $A_G(x)$ |
-|-----------------------------|----------|
+| $x$                           | $A_G(x)$ |
+| ----------------------------- | -------- |
 | $\frac{\sqrt{5} − 1}{4}$    | $1$      |
-| $\frac{2}{5}$               | $2$      |
+| $\frac{2}{5}$                | $2$      |
 | $\frac{\sqrt{22} − 2}{6}$   | $3$      |
 | $\frac{\sqrt{137} − 5}{14}$ | $4$      |
-| $\frac{1}{2}$               | $5$      |
+| $\frac{1}{2}$                | $5$      |
 
 We shall call $A_G(x)$ a golden nugget if $x$ is rational because they become increasingly rarer; for example, the 20th golden nugget is 211345365. Find the sum of the first thirty golden nuggets.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-143-investigating-the-torricelli-point-of-a-triangle.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-143-investigating-the-torricelli-point-of-a-triangle.md
index 740abfaab0e..8051dd4317d 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-143-investigating-the-torricelli-point-of-a-triangle.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-143-investigating-the-torricelli-point-of-a-triangle.md
@@ -14,7 +14,7 @@ Fermat challenged Torricelli to find the position of X such that p + q + r was m
 
 Torricelli was able to prove that if equilateral triangles AOB, BNC and AMC are constructed on each side of triangle ABC, the circumscribed circles of AOB, BNC, and AMC will intersect at a single point, T, inside the triangle. Moreover he proved that T, called the Torricelli/Fermat point, minimises $p + q + r$. Even more remarkable, it can be shown that when the sum is minimised, $AN = BM = CO = p + q + r$ and that AN, BM and CO also intersect at T.
 
-<img class="img-responsive center-block" alt="equilateral triangles AOB, BNC and AMC constructed on each side of triangle ABC; with the circumscribed circles of AOB, BNC, and AMC will intersecting at a single point, T, inside the triangle" src="https://cdn.freecodecamp.org/curriculum/project-euler/investigating-the-torricelli-point-of-a-triangle.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="equilateral triangles AOB, BNC and AMC constructed on each side of triangle ABC; with the circumscribed circles of AOB, BNC, and AMC will intersecting at a single point, T, inside the triangle" src="https://cdn.freecodecamp.org/curriculum/project-euler/investigating-the-torricelli-point-of-a-triangle.png" style="background-color: white; padding: 10px;" />
 
 If the sum is minimised and a, b, c, p, q and r are all positive integers we shall call triangle ABC a Torricelli triangle. For example, $a = 399$, $b = 455$, $c = 511$ is an example of a Torricelli triangle, with $p + q + r = 784$. Find the sum of all distinct values of $p + q + r ≤ 120000$ for Torricelli triangles.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-147-rectangles-in-cross-hatched-grids.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-147-rectangles-in-cross-hatched-grids.md
index de23fc8ac86..dfade844910 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-147-rectangles-in-cross-hatched-grids.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-147-rectangles-in-cross-hatched-grids.md
@@ -10,18 +10,11 @@ dashedName: problem-147-rectangles-in-cross-hatched-grids
 
 In a 3x2 cross-hatched grid, a total of 37 different rectangles could be situated within that grid as indicated in the sketch.
 
-<img class="img-responsive center-block" alt="ways of situating different rectangles within cross-hatched 3x2 grid" src="https://cdn.freecodecamp.org/curriculum/project-euler/rectangles-in-cross-hatched-grids.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="ways of situating different rectangles within cross-hatched 3x2 grid" src="https://cdn.freecodecamp.org/curriculum/project-euler/rectangles-in-cross-hatched-grids.png" style="background-color: white; padding: 10px;" />
 
 There are 5 grids smaller than 3x2, vertical and horizontal dimensions being important, i.e. 1x1, 2x1, 3x1, 1x2 and 2x2. If each of them is cross-hatched, the following number of different rectangles could be situated within those smaller grids:
 
-$$\begin{array}{|c|c|}
-\hline
-  1 \times 1 & 1  \\\\ \hline
-  2 \times 1 & 4  \\\\ \hline
-  3 \times 1 & 8  \\\\ \hline
-  1 \times 2 & 4  \\\\ \hline
-  2 \times 2 & 18 \\\\ \hline
-\end{array}$$
+$$\begin{array}{|c|c|} \hline 1 \times 1 & 1  \\\\ \hline 2 \times 1 & 4  \\\\ \hline 3 \times 1 & 8  \\\\ \hline 1 \times 2 & 4  \\\\ \hline 2 \times 2 & 18 \\\\ \hline \end{array}$$
 
 Adding those to the 37 of the 3x2 grid, a total of 72 different rectangles could be situated within 3x2 and smaller grids.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-149-searching-for-a-maximum-sum-subsequence.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-149-searching-for-a-maximum-sum-subsequence.md
index 1d300dbcefc..c1fbd34962d 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-149-searching-for-a-maximum-sum-subsequence.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-149-searching-for-a-maximum-sum-subsequence.md
@@ -10,13 +10,7 @@ dashedName: problem-149-searching-for-a-maximum-sum-subsequence
 
 Looking at the table below, it is easy to verify that the maximum possible sum of adjacent numbers in any direction (horizontal, vertical, diagonal or anti-diagonal) is $16 (= 8 + 7 + 1)$.
 
-$$\begin{array}{|r|r|r|r|}
-  \hline
-  −2 &  5 &  3 & 2 \\\\ \hline
-   9 & −6 &  5 & 1 \\\\ \hline
-   3 &  2 &  7 & 3 \\\\ \hline
-  −1 &  8 & −4 & 8 \\\\ \hline
-\end{array}$$
+$$\begin{array}{|r|r|r|r|} \hline −2 &  5 &  3 & 2 \\\\ \hline 9 & −6 &  5 & 1 \\\\ \hline 3 &  2 &  7 & 3 \\\\ \hline −1 &  8 & −4 & 8 \\\\ \hline \end{array}$$
 
 Now, let us repeat the search, but on a much larger scale:
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-150-searching-a-triangular-array-for-a-sub-triangle-having-minimum-sum.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-150-searching-a-triangular-array-for-a-sub-triangle-having-minimum-sum.md
index 7ae755c60ff..366d5dd9bd0 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-150-searching-a-triangular-array-for-a-sub-triangle-having-minimum-sum.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-150-searching-a-triangular-array-for-a-sub-triangle-having-minimum-sum.md
@@ -1,8 +1,7 @@
 ---
 id: 5900f4031000cf542c50ff15
 title: >-
-  Problem 150: Searching a triangular array for a sub-triangle having
-  minimum-sum
+  Problem 150: Searching a triangular array for a sub-triangle having minimum-sum
 challengeType: 1
 forumTopicId: 301781
 dashedName: problem-150-searching-a-triangular-array-for-a-sub-triangle-having-minimum-sum
@@ -14,28 +13,21 @@ In a triangular array of positive and negative integers, we wish to find a sub-t
 
 In the example below, it can be easily verified that the marked triangle satisfies this condition having a sum of −42.
 
-<img class="img-responsive center-block" alt="triangular array, with marked sub-triangle, having sum of -42" src="https://cdn.freecodecamp.org/curriculum/project-euler/searching-a-triangular-array-for-a-sub-triangle-having-minimum-sum.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="triangular array, with marked sub-triangle, having sum of -42" src="https://cdn.freecodecamp.org/curriculum/project-euler/searching-a-triangular-array-for-a-sub-triangle-having-minimum-sum.gif" style="background-color: white; padding: 10px;" />
 
 We wish to make such a triangular array with one thousand rows, so we generate 500500 pseudo-random numbers $s_k$ in the range $±2^{19}$, using a type of random number generator (known as a Linear Congruential Generator) as follows:
 
-$$\begin{align}
-  t := & \\ 0\\\\
-  \text{for}\\ & k = 1\\ \text{up to}\\ k = 500500:\\\\
-  & t := (615949 × t + 797807)\\ \text{modulo}\\ 2^{20}\\\\
-  & s_k := t − 219\\\\
-\end{align}$$
+$$\begin{align}   t := & \\ 0\\\\
+  \text{for}\\ & k = 1\\ \text{up to}\\ k = 500500:\\\\   & t := (615949 × t + 797807)\\ \text{modulo}\\ 2^{20}\\\\
+  & s_k := t − 219\\\\ \end{align}$$
 
 Thus: $s_1 = 273519$, $s_2 = −153582$, $s_3 = 450905$ etc.
 
 Our triangular array is then formed using the pseudo-random numbers thus:
 
-$$
-s_1 \\\\
-s_2\\;s_3 \\\\
-s_4\\; s_5\\; s_6 \\\\
-s_7\\; s_8\\; s_9\\; s_{10} \\\\
-\ldots
-$$
+$$ s_1 \\\\
+s_2\\;s_3 \\\\ s_4\\; s_5\\; s_6 \\\\
+s_7\\; s_8\\; s_9\\; s_{10} \\\\ \ldots $$
 
 Sub-triangles can start at any element of the array and extend down as far as we like (taking-in the two elements directly below it from the next row, the three elements directly below from the row after that, and so on).
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-151-paper-sheets-of-standard-sizes-an-expected-value-problem.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-151-paper-sheets-of-standard-sizes-an-expected-value-problem.md
index f5d8ba23b58..47f785ed97b 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-151-paper-sheets-of-standard-sizes-an-expected-value-problem.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-151-paper-sheets-of-standard-sizes-an-expected-value-problem.md
@@ -16,7 +16,7 @@ He proceeds to cut it in half, thus getting two sheets of size A2. Then he cuts
 
 All the unused sheets are placed back in the envelope.
 
-<img class="img-responsive center-block" alt="A1-size sheet split into: A2, A3, A4 and two A5 sheets" src="https://cdn.freecodecamp.org/curriculum/project-euler/paper-sheets-of-standard-sizes-an-expected-value-problem.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="A1-size sheet split into: A2, A3, A4 and two A5 sheets" src="https://cdn.freecodecamp.org/curriculum/project-euler/paper-sheets-of-standard-sizes-an-expected-value-problem.png" style="background-color: white; padding: 10px;" />
 
 At the beginning of each subsequent batch, he takes one sheet of paper from the envelope at random. If it is of size A5, he uses it. If it is larger, he repeats the 'cut-in-half' procedure until he has what he needs, and any remaining sheets are always placed back in the envelope.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-153-investigating-gaussian-integers.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-153-investigating-gaussian-integers.md
index 48eaca04587..a66c05c4f97 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-153-investigating-gaussian-integers.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-153-investigating-gaussian-integers.md
@@ -43,7 +43,7 @@ Note also that if the Gaussian Integer ($a + bi$) is a divisor of a rational int
 The following is a table of all of the divisors for the first five positive rational integers:
 
 | n | Gaussian integer divisors with positive real part | Sum s(n) of these divisors |
-|---|---------------------------------------------------|----------------------------|
+| - | ------------------------------------------------- | -------------------------- |
 | 1 | 1                                                 | 1                          |
 | 2 | 1, 1 + i, 1 - i, 2                                | 5                          |
 | 3 | 1, 3                                              | 4                          |
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-154-exploring-pascals-pyramid.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-154-exploring-pascals-pyramid.md
index 7c7f2da7de6..40533ba38f8 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-154-exploring-pascals-pyramid.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-154-exploring-pascals-pyramid.md
@@ -10,7 +10,7 @@ dashedName: problem-154-exploring-pascals-pyramid
 
 A triangular pyramid is constructed using spherical balls so that each ball rests on exactly three balls of the next lower level.
 
-<img class="img-responsive center-block" alt="triangular pyramid constructed using spherical balls with four levels" src="https://cdn.freecodecamp.org/curriculum/project-euler/exploring-pascals-pyramid.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="triangular pyramid constructed using spherical balls with four levels" src="https://cdn.freecodecamp.org/curriculum/project-euler/exploring-pascals-pyramid.png" style="background-color: white; padding: 10px;" />
 
 Then, we calculate the number of paths leading from the apex to each position: A path starts at the apex and progresses downwards to any of the three spheres directly below the current position. Consequently, the number of paths to reach a certain position is the sum of the numbers immediately above it (depending on the position, there are up to three numbers above it).
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-155-counting-capacitor-circuits.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-155-counting-capacitor-circuits.md
index 689d8757526..ee1b1f97d9b 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-155-counting-capacitor-circuits.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-155-counting-capacitor-circuits.md
@@ -14,7 +14,7 @@ The capacitors can be connected in series or in parallel to form sub-units, whic
 
 Using this simple procedure and up to n identical capacitors, we can make circuits having a range of different total capacitances. For example, using up to $n = 3$ capacitors of $60 μF$ each, we can obtain the following 7 distinct total capacitance values:
 
-<img class="img-responsive center-block" alt="example circuits having up to three capacitors, each of 60 μF" src="https://cdn.freecodecamp.org/curriculum/project-euler/counting-capacitor-circuits.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="example circuits having up to three capacitors, each of 60 μF" src="https://cdn.freecodecamp.org/curriculum/project-euler/counting-capacitor-circuits.gif" style="background-color: white; padding: 10px;" />
 
 If we denote by $D(n)$ the number of distinct total capacitance values we can obtain when using up to $n$ equal-valued capacitors and the simple procedure described above, we have: $D(1) = 1, D(2) = 3, D(3)=7, \ldots$
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-156-counting-digits.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-156-counting-digits.md
index 18df0f1c408..fb820e64aa0 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-156-counting-digits.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-156-counting-digits.md
@@ -15,7 +15,7 @@ Starting from zero the natural numbers are written down in base 10 like this:
 Consider the digit $d = 1$. After we write down each number n, we will update the number of ones that have occurred and call this number $f(n, 1)$. The first values for $f(n, 1)$, then, are as follows:
 
 | $n$ | $f(n, 1)$ |
-|-----|-----------|
+| --- | --------- |
 | 0   | 0         |
 | 1   | 1         |
 | 2   | 1         |
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-157-solving-the-diophantine-equation.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-157-solving-the-diophantine-equation.md
index 1755588066e..aa5e8185547 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-157-solving-the-diophantine-equation.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-157-solving-the-diophantine-equation.md
@@ -12,20 +12,10 @@ Consider the diophantine equation $\frac{1}{a} + \frac{1}{b} = \frac{p}{{10}^n}$
 
 For $n = 1$ this equation has 20 solutions that are listed below:
 
-$$\begin{array}{lllll}
-  \frac{1}{1}  + \frac{1}{1}  = \frac{20}{10} & \frac{1}{1} + \frac{1}{2}  = \frac{15}{10}
-& \frac{1}{1}  + \frac{1}{5}  = \frac{12}{10} & \frac{1}{1} + \frac{1}{10} = \frac{11}{10}
-& \frac{1}{2}  + \frac{1}{2}  = \frac{10}{10} \\\\
-  \frac{1}{2}  + \frac{1}{5}  = \frac{7}{10}   & \frac{1}{2} + \frac{1}{10} = \frac{6}{10}
-& \frac{1}{3}  + \frac{1}{6}  = \frac{5}{10}   & \frac{1}{3} + \frac{1}{15} = \frac{4}{10}
-& \frac{1}{4}  + \frac{1}{4}  = \frac{5}{10} \\\\
-  \frac{1}{4}  + \frac{1}{4}  = \frac{5}{10}  & \frac{1}{5}  + \frac{1}{5}  = \frac{4}{10}
-& \frac{1}{5}  + \frac{1}{10} = \frac{3}{10}  & \frac{1}{6}  + \frac{1}{30} = \frac{2}{10}
-& \frac{1}{10} + \frac{1}{10} = \frac{2}{10} \\\\
-  \frac{1}{11} + \frac{1}{110} = \frac{1}{10} & \frac{1}{12} + \frac{1}{60}  = \frac{1}{10}
-& \frac{1}{14} + \frac{1}{35}  = \frac{1}{10} & \frac{1}{15} + \frac{1}{30}  = \frac{1}{10}
-& \frac{1}{20} + \frac{1}{20}  = \frac{1}{10}
-\end{array}$$
+$$\begin{array}{lllll} \frac{1}{1}  + \frac{1}{1}  = \frac{20}{10} & \frac{1}{1} + \frac{1}{2}  = \frac{15}{10} & \frac{1}{1}  + \frac{1}{5}  = \frac{12}{10} & \frac{1}{1} + \frac{1}{10} = \frac{11}{10} & \frac{1}{2}  + \frac{1}{2}  = \frac{10}{10} \\\\
+  \frac{1}{2}  + \frac{1}{5}  = \frac{7}{10}   & \frac{1}{2} + \frac{1}{10} = \frac{6}{10} & \frac{1}{3}  + \frac{1}{6}  = \frac{5}{10}   & \frac{1}{3} + \frac{1}{15} = \frac{4}{10} & \frac{1}{4}  + \frac{1}{4}  = \frac{5}{10} \\\\
+  \frac{1}{4}  + \frac{1}{4}  = \frac{5}{10}  & \frac{1}{5}  + \frac{1}{5}  = \frac{4}{10} & \frac{1}{5}  + \frac{1}{10} = \frac{3}{10}  & \frac{1}{6}  + \frac{1}{30} = \frac{2}{10} & \frac{1}{10} + \frac{1}{10} = \frac{2}{10} \\\\
+  \frac{1}{11} + \frac{1}{110} = \frac{1}{10} & \frac{1}{12} + \frac{1}{60}  = \frac{1}{10} & \frac{1}{14} + \frac{1}{35}  = \frac{1}{10} & \frac{1}{15} + \frac{1}{30}  = \frac{1}{10} & \frac{1}{20} + \frac{1}{20}  = \frac{1}{10} \end{array}$$
 
 How many solutions has this equation for $1 ≤ n ≤ 9$?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-158-exploring-strings-for-which-only-one-character-comes-lexicographically-after-its-neighbour-to-the-left.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-158-exploring-strings-for-which-only-one-character-comes-lexicographically-after-its-neighbour-to-the-left.md
index 0958ce2b50c..845e2be3303 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-158-exploring-strings-for-which-only-one-character-comes-lexicographically-after-its-neighbour-to-the-left.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-158-exploring-strings-for-which-only-one-character-comes-lexicographically-after-its-neighbour-to-the-left.md
@@ -1,8 +1,7 @@
 ---
 id: 5900f40a1000cf542c50ff1d
 title: >-
-  Problem 158: Exploring strings for which only one character comes
-  lexicographically after its neighbour to the left
+  Problem 158: Exploring strings for which only one character comes lexicographically after its neighbour to the left
 challengeType: 1
 forumTopicId: 301789
 dashedName: >-
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-159-digital-root-sums-of-factorisations.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-159-digital-root-sums-of-factorisations.md
index 23d78359ac2..07a2e4945a4 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-159-digital-root-sums-of-factorisations.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-159-digital-root-sums-of-factorisations.md
@@ -12,29 +12,24 @@ A composite number can be factored many different ways.
 
 For instance, not including multiplication by one, 24 can be factored in 7 distinct ways:
 
-$$\begin{align}
-  & 24 = 2 \times 2 \times 2 \times 3\\\\
-  & 24 = 2 \times 3 \times 4  \\\\
-  & 24 = 2 \times 2 \times 6  \\\\
-  & 24 = 4 \times 6    \\\\
-  & 24 = 3 \times 8    \\\\
-  & 24 = 2 \times 12   \\\\
-  & 24 = 24
-\end{align}$$
+$$\begin{align}   & 24 = 2 \times 2 \times 2 \times 3\\\\
+  & 24 = 2 \times 3 \times 4  \\\\   & 24 = 2 \times 2 \times 6  \\\\
+  & 24 = 4 \times 6    \\\\   & 24 = 3 \times 8    \\\\
+  & 24 = 2 \times 12   \\\\ & 24 = 24 \end{align}$$
 
 Recall that the digital root of a number, in base 10, is found by adding together the digits of that number, and repeating that process until a number arrives at less than 10. Thus the digital root of 467 is 8.
 
 We shall call a Digital Root Sum (DRS) the sum of the digital roots of the individual factors of our number. The chart below demonstrates all of the DRS values for 24.
 
 | Factorisation | Digital Root Sum |
-|---------------|------------------|
-|    2x2x2x3    |        9         |
-|     2x3x4     |        9         |
-|     2x2x6     |        10        |
-|      4x6      |        10        |
-|      3x8      |        11        |
-|      2x12     |        5         |
-|      24       |        6         |
+| ------------- | ---------------- |
+| 2x2x2x3       | 9                |
+| 2x3x4         | 9                |
+| 2x2x6         | 10               |
+| 4x6           | 10               |
+| 3x8           | 11               |
+| 2x12          | 5                |
+| 24            | 6                |
 
 The maximum Digital Root Sum of 24 is 11. The function $mdrs(n)$ gives the maximum Digital Root Sum of $n$. So $mdrs(24) = 11$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-160-factorial-trailing-digits.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-160-factorial-trailing-digits.md
index 931bc41006e..ceec9db70d3 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-160-factorial-trailing-digits.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-160-factorial-trailing-digits.md
@@ -12,11 +12,8 @@ For any $N$, let $f(N)$ be the last five digits before the trailing zeroes in $N
 
 For example,
 
-$$\begin{align}
-  & 9! = 362880 \\; \text{so} \\; f(9) = 36288 \\\\
-  & 10! = 3628800 \\; \text{so} \\; f(10) = 36288 \\\\
-  & 20! = 2432902008176640000 \\; \text{so} \\; f(20) = 17664
-\end{align}$$
+$$\begin{align}   & 9! = 362880 \\; \text{so} \\; f(9) = 36288 \\\\
+  & 10! = 3628800 \\; \text{so} \\; f(10) = 36288 \\\\ & 20! = 2432902008176640000 \\; \text{so} \\; f(20) = 17664 \end{align}$$
 
 Find $f(1,000,000,000,000)$
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-161-triominoes.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-161-triominoes.md
index 2388b67b547..8e0a070c788 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-161-triominoes.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-161-triominoes.md
@@ -12,15 +12,15 @@ A triomino is a shape consisting of three squares joined via the edges.
 
 There are two basic forms:
 
-<img class="img-responsive center-block" alt="two basic triominoes forms" src="https://cdn.freecodecamp.org/curriculum/project-euler/triominoes-1.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="two basic triominoes forms" src="https://cdn.freecodecamp.org/curriculum/project-euler/triominoes-1.gif" style="background-color: white; padding: 10px;" />
 
 If all possible orientations are taken into account there are six:
 
-<img class="img-responsive center-block" alt="triominoes forms including orientation" src="https://cdn.freecodecamp.org/curriculum/project-euler/triominoes-2.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="triominoes forms including orientation" src="https://cdn.freecodecamp.org/curriculum/project-euler/triominoes-2.gif" style="background-color: white; padding: 10px;" />
 
 Any n by m grid for which nxm is divisible by 3 can be tiled with triominoes. If we consider tilings that can be obtained by reflection or rotation from another tiling as different there are 41 ways a 2 by 9 grid can be tiled with triominoes:
 
-<img class="img-responsive center-block" alt="animation showing 41 ways of filling 2x9 grid with triominoes" src="https://cdn.freecodecamp.org/curriculum/project-euler/triominoes-3.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="animation showing 41 ways of filling 2x9 grid with triominoes" src="https://cdn.freecodecamp.org/curriculum/project-euler/triominoes-3.gif" style="background-color: white; padding: 10px;" />
 
 In how many ways can a 9 by 12 grid be tiled in this way by triominoes?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-163-cross-hatched-triangles.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-163-cross-hatched-triangles.md
index 45a8ed0be6e..e5fa50fb8e9 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-163-cross-hatched-triangles.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-163-cross-hatched-triangles.md
@@ -10,7 +10,7 @@ dashedName: problem-163-cross-hatched-triangles
 
 Consider an equilateral triangle in which straight lines are drawn from each vertex to the middle of the opposite side, such as in the size 1 triangle in the sketch below.
 
-<img class="img-responsive center-block" alt="triangles with size 1 and size 2" src="https://cdn.freecodecamp.org/curriculum/project-euler/cross-hatched-triangles.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="triangles with size 1 and size 2" src="https://cdn.freecodecamp.org/curriculum/project-euler/cross-hatched-triangles.gif" style="background-color: white; padding: 10px;" />
 
 Sixteen triangles of either different shape or size or orientation or location can now be observed in that triangle. Using size 1 triangles as building blocks, larger triangles can be formed, such as the size 2 triangle in the above sketch. One-hundred and four triangles of either different shape or size or orientation or location can now be observed in that size 2 triangle.
 
@@ -18,10 +18,8 @@ It can be observed that the size 2 triangle contains 4 size 1 triangle building
 
 If we denote $T(n)$ as the number of triangles present in a triangle of size $n$, then
 
-$$\begin{align}
-  & T(1) = 16 \\\\
-  & T(2) = 104
-\end{align}$$
+$$\begin{align}   & T(1) = 16 \\\\
+  & T(2) = 104 \end{align}$$
 
 Find $T(36)$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-164-numbers-for-which-no-three-consecutive-digits-have-a-sum-greater-than-a-given-value.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-164-numbers-for-which-no-three-consecutive-digits-have-a-sum-greater-than-a-given-value.md
index a41ebead4d5..83215f99ba4 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-164-numbers-for-which-no-three-consecutive-digits-have-a-sum-greater-than-a-given-value.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-164-numbers-for-which-no-three-consecutive-digits-have-a-sum-greater-than-a-given-value.md
@@ -1,8 +1,7 @@
 ---
 id: 5900f4111000cf542c50ff23
 title: >-
-  Problem 164: Numbers for which no three consecutive digits have a sum greater
-  than a given value
+  Problem 164: Numbers for which no three consecutive digits have a sum greater than a given value
 challengeType: 1
 forumTopicId: 301798
 dashedName: >-
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-165-intersections.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-165-intersections.md
index ce5c0152ebc..04fef3d3e53 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-165-intersections.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-165-intersections.md
@@ -16,20 +16,16 @@ We will call a common point $T$ of two segments $L_1$ and $L_2$ a true intersect
 
 Consider the three segments $L_1$, $L_2$, and $L_3$:
 
-$$\begin{align}
-  & L_1: (27, 44) \\;\text{to}\\; (12, 32) \\\\
-  & L_2: (46, 53) \\;\text{to}\\; (17, 62) \\\\
-  & L_3: (46, 70) \\;\text{to}\\; (22, 40) \\\\
+$$\begin{align}   & L_1: (27, 44) \\;\text{to}\\; (12, 32) \\\\
+  & L_2: (46, 53) \\;\text{to}\\; (17, 62) \\\\   & L_3: (46, 70) \\;\text{to}\\; (22, 40) \\\\
 \end{align}$$
 
 It can be verified that line segments $L_2$ and $L_3$ have a true intersection point. We note that as the one of the end points of $L_3$: (22, 40) lies on $L_1$ this is not considered to be a true point of intersection. $L_1$ and $L_2$ have no common point. So among the three line segments, we find one true intersection point.
 
 Now let us do the same for 5000 line segments. To this end, we generate 20000 numbers using the so-called "Blum Blum Shub" pseudo-random number generator.
 
-$$\begin{align}
-  & s_0 = 290797 \\\\
-  & s_{n + 1} = s_n × s_n (\text{modulo}\\; 50515093) \\\\
-  & t_n = s_n (\text{modulo}\\; 500) \\\\
+$$\begin{align}   & s_0 = 290797 \\\\
+  & s_{n + 1} = s_n × s_n (\text{modulo}\\; 50515093) \\\\   & t_n = s_n (\text{modulo}\\; 500) \\\\
 \end{align}$$
 
 To create each line segment, we use four consecutive numbers $t_n$. That is, the first line segment is given by:
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-166-criss-cross.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-166-criss-cross.md
index fbe5a1f7536..f413a225835 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-166-criss-cross.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-166-criss-cross.md
@@ -12,12 +12,9 @@ A 4x4 grid is filled with digits $d$, $0 ≤ d ≤ 9$.
 
 It can be seen that in the grid
 
-$$\begin{array}{}
-  6 & 3 & 3 & 0 \\\\
-  5 & 0 & 4 & 3 \\\\
-  0 & 7 & 1 & 4 \\\\
-  1 & 2 & 4 & 5
-\end{array}$$
+$$\begin{array}{}   6 & 3 & 3 & 0 \\\\
+  5 & 0 & 4 & 3 \\\\   0 & 7 & 1 & 4 \\\\
+  1 & 2 & 4 & 5 \end{array}$$
 
 the sum of each row and each column has the value 12. Moreover the sum of each diagonal is also 12.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-169-exploring-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-169-exploring-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.md
index bc4e5eb44e2..52005157a98 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-169-exploring-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-169-exploring-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.md
@@ -1,8 +1,7 @@
 ---
 id: 5900f4151000cf542c50ff28
 title: >-
-  Problem 169: Exploring the number of different ways a number can be expressed
-  as a sum of powers of 2
+  Problem 169: Exploring the number of different ways a number can be expressed as a sum of powers of 2
 challengeType: 1
 forumTopicId: 301803
 dashedName: >-
@@ -15,13 +14,9 @@ Define $f(0)=1$ and $f(n)$ to be the number of different ways $n$ can be express
 
 For example, $f(10)=5$ since there are five different ways to express 10:
 
-$$\begin{align}
-  & 1 + 1 + 8 \\\\
-  & 1 + 1 + 4 + 4 \\\\
-  & 1 + 1 + 2 + 2 + 4 \\\\
-  & 2 + 4 + 4 \\\\
-  & 2 + 8
-\end{align}$$
+$$\begin{align}   & 1 + 1 + 8 \\\\
+  & 1 + 1 + 4 + 4 \\\\   & 1 + 1 + 2 + 2 + 4 \\\\
+  & 2 + 4 + 4 \\\\ & 2 + 8 \end{align}$$
 
 What is $f({10}^{25})$?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-170-find-the-largest-0-to-9-pandigital-that-can-be-formed-by-concatenating-products.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-170-find-the-largest-0-to-9-pandigital-that-can-be-formed-by-concatenating-products.md
index a05f5fadd3b..b6886e18764 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-170-find-the-largest-0-to-9-pandigital-that-can-be-formed-by-concatenating-products.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-170-find-the-largest-0-to-9-pandigital-that-can-be-formed-by-concatenating-products.md
@@ -1,8 +1,7 @@
 ---
 id: 5900f4161000cf542c50ff29
 title: >-
-  Problem 170: Find the largest 0 to 9 pandigital that can be formed by
-  concatenating products
+  Problem 170: Find the largest 0 to 9 pandigital that can be formed by concatenating products
 challengeType: 1
 forumTopicId: 301805
 dashedName: >-
@@ -13,10 +12,8 @@ dashedName: >-
 
 Take the number 6 and multiply it by each of 1273 and 9854:
 
-$$\begin{align}
-  & 6 × 1273 = 7638 \\\\
-  & 6 × 9854 = 59124 \\\\
-\end{align}$$
+$$\begin{align}   & 6 × 1273 = 7638 \\\\
+  & 6 × 9854 = 59124 \\\\ \end{align}$$
 
 By concatenating these products we get the 1 to 9 pandigital 763859124. We will call 763859124 the "concatenated product of 6 and (1273, 9854)". Notice too, that the concatenation of the input numbers, 612739854, is also 1 to 9 pandigital.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-171-finding-numbers-for-which-the-sum-of-the-squares-of-the-digits-is-a-square.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-171-finding-numbers-for-which-the-sum-of-the-squares-of-the-digits-is-a-square.md
index 30ed95e36a2..60133bf2e51 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-171-finding-numbers-for-which-the-sum-of-the-squares-of-the-digits-is-a-square.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-171-finding-numbers-for-which-the-sum-of-the-squares-of-the-digits-is-a-square.md
@@ -1,8 +1,7 @@
 ---
 id: 5900f4181000cf542c50ff2a
 title: >-
-  Problem 171: Finding numbers for which the sum of the squares of the digits is
-  a square
+  Problem 171: Finding numbers for which the sum of the squares of the digits is a square
 challengeType: 1
 forumTopicId: 301806
 dashedName: >-
@@ -13,10 +12,8 @@ dashedName: >-
 
 For a positive integer $n$, let $f(n)$ be the sum of the squares of the digits (in base 10) of $n$, e.g.
 
-$$\begin{align}
-  & f(3) = 3^2 = 9 \\\\
-  & f(25) = 2^2 + 5^2 = 4 + 25 = 29 \\\\
-  & f(442) = 4^2 + 4^2 + 2^2 = 16 + 16 + 4 = 36 \\\\
+$$\begin{align}   & f(3) = 3^2 = 9 \\\\
+  & f(25) = 2^2 + 5^2 = 4 + 25 = 29 \\\\   & f(442) = 4^2 + 4^2 + 2^2 = 16 + 16 + 4 = 36 \\\\
 \end{align}$$
 
 Find the last nine digits of the sum of all $n$, $0 &lt; n &lt; {10}^{20}$, such that $f(n)$ is a perfect square.
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-173-using-up-to-one-million-tiles-how-many-different-hollow-square-laminae-can-be-formed.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-173-using-up-to-one-million-tiles-how-many-different-hollow-square-laminae-can-be-formed.md
index 12dfaa16ba5..0488d662943 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-173-using-up-to-one-million-tiles-how-many-different-hollow-square-laminae-can-be-formed.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-173-using-up-to-one-million-tiles-how-many-different-hollow-square-laminae-can-be-formed.md
@@ -1,8 +1,7 @@
 ---
 id: 5900f41a1000cf542c50ff2c
 title: >-
-  Problem 173: Using up to one million tiles how many different "hollow" square
-  laminae can be formed?
+  Problem 173: Using up to one million tiles how many different "hollow" square laminae can be formed?
 challengeType: 1
 forumTopicId: 301808
 dashedName: >-
@@ -13,7 +12,7 @@ dashedName: >-
 
 We shall define a square lamina to be a square outline with a square "hole" so that the shape possesses vertical and horizontal symmetry. For example, using exactly thirty-two square tiles we can form two different square laminae:
 
-<img class="img-responsive center-block" alt="two square lamina with holes 2x2 and 7x7" src="https://cdn.freecodecamp.org/curriculum/project-euler/using-up-to-one-million-tiles-how-many-different-hollow-square-laminae-can-be-formed.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="two square lamina with holes 2x2 and 7x7" src="https://cdn.freecodecamp.org/curriculum/project-euler/using-up-to-one-million-tiles-how-many-different-hollow-square-laminae-can-be-formed.gif" style="background-color: white; padding: 10px;" />
 
 With one-hundred tiles, and not necessarily using all of the tiles at one time, it is possible to form forty-one different square laminae. Using up to one million tiles how many different square laminae can be formed?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-174-counting-the-number-of-hollow-square-laminae-that-can-form-one-two-three-...-distinct-arrangements.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-174-counting-the-number-of-hollow-square-laminae-that-can-form-one-two-three-...-distinct-arrangements.md
index ed0eeb2523f..48843b6b0a9 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-174-counting-the-number-of-hollow-square-laminae-that-can-form-one-two-three-...-distinct-arrangements.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-174-counting-the-number-of-hollow-square-laminae-that-can-form-one-two-three-...-distinct-arrangements.md
@@ -1,8 +1,7 @@
 ---
 id: 5900f41a1000cf542c50ff2d
 title: >-
-  Problem 174: Counting the number of "hollow" square laminae that can form one,
-  two, three, ... distinct arrangements
+  Problem 174: Counting the number of "hollow" square laminae that can form one, two, three, ... distinct arrangements
 challengeType: 1
 forumTopicId: 301809
 dashedName: >-
@@ -15,7 +14,7 @@ We shall define a square lamina to be a square outline with a square "hole" so t
 
 Given eight tiles it is possible to form a lamina in only one way: 3x3 square with a 1x1 hole in the middle. However, using thirty-two tiles it is possible to form two distinct laminae.
 
-<img class="img-responsive center-block" alt="two square lamina with holes 2x2 and 7x7" src="https://cdn.freecodecamp.org/curriculum/project-euler/using-up-to-one-million-tiles-how-many-different-hollow-square-laminae-can-be-formed.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="two square lamina with holes 2x2 and 7x7" src="https://cdn.freecodecamp.org/curriculum/project-euler/using-up-to-one-million-tiles-how-many-different-hollow-square-laminae-can-be-formed.gif" style="background-color: white; padding: 10px;" />
 
 If $t$ represents the number of tiles used, we shall say that $t = 8$ is type $L(1)$ and $t = 32$ is type $L(2)$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-175-fractions-involving-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-175-fractions-involving-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.md
index 216cfa1937f..b3419c34823 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-175-fractions-involving-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-175-fractions-involving-the-number-of-different-ways-a-number-can-be-expressed-as-a-sum-of-powers-of-2.md
@@ -1,8 +1,7 @@
 ---
 id: 5900f41c1000cf542c50ff2e
 title: >-
-  Problem 175: Fractions involving the number of different ways a number can be
-  expressed as a sum of powers of 2
+  Problem 175: Fractions involving the number of different ways a number can be expressed as a sum of powers of 2
 challengeType: 1
 forumTopicId: 301810
 dashedName: >-
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-177-integer-angled-quadrilaterals.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-177-integer-angled-quadrilaterals.md
index 750a7e26e8b..c6f7b8ee5c4 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-177-integer-angled-quadrilaterals.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-177-integer-angled-quadrilaterals.md
@@ -10,7 +10,7 @@ dashedName: problem-177-integer-angled-quadrilaterals
 
 Let ABCD be a convex quadrilateral, with diagonals AC and BD. At each vertex the diagonal makes an angle with each of the two sides, creating eight corner angles.
 
-<img class="img-responsive center-block" alt="convex quadrilateral ABCD, with diagonals AC and BD" src="https://cdn.freecodecamp.org/curriculum/project-euler/integer-angled-quadrilaterals.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="convex quadrilateral ABCD, with diagonals AC and BD" src="https://cdn.freecodecamp.org/curriculum/project-euler/integer-angled-quadrilaterals.gif" style="background-color: white; padding: 10px;" />
 
 For example, at vertex A, the two angles are CAD, CAB.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-180-rational-zeros-of-a-function-of-three-variables.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-180-rational-zeros-of-a-function-of-three-variables.md
index 347135bc3cd..9eed96d38b2 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-180-rational-zeros-of-a-function-of-three-variables.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-180-rational-zeros-of-a-function-of-three-variables.md
@@ -10,17 +10,12 @@ dashedName: problem-180-rational-zeros-of-a-function-of-three-variables
 
 For any integer $n$, consider the three functions
 
-$$\begin{align}
-  & f_{1,n}(x,y,z) = x^{n + 1} + y^{n + 1} − z^{n + 1}\\\\
-  & f_{2,n}(x,y,z) = (xy + yz + zx) \times (x^{n - 1} + y^{n - 1} − z^{n - 1})\\\\
-  & f_{3,n}(x,y,z) = xyz \times (x^{n - 2} + y^{n - 2} − z^{n - 2})
-\end{align}$$
+$$\begin{align}   & f_{1,n}(x,y,z) = x^{n + 1} + y^{n + 1} − z^{n + 1}\\\\
+  & f_{2,n}(x,y,z) = (xy + yz + zx) \times (x^{n - 1} + y^{n - 1} − z^{n - 1})\\\\ & f_{3,n}(x,y,z) = xyz \times (x^{n - 2} + y^{n - 2} − z^{n - 2}) \end{align}$$
 
 and their combination
 
-$$\begin{align}
-  & f_n(x,y,z) = f_{1,n}(x,y,z) + f_{2,n}(x,y,z) − f_{3,n}(x,y,z)
-\end{align}$$
+$$\begin{align} & f_n(x,y,z) = f_{1,n}(x,y,z) + f_{2,n}(x,y,z) − f_{3,n}(x,y,z) \end{align}$$
 
 We call $(x,y,z)$ a golden triple of order $k$ if $x$, $y$, and $z$ are all rational numbers of the form $\frac{a}{b}$ with $0 &lt; a &lt; b ≤ k$ and there is (at least) one integer $n$, so that $f_n(x,y,z) = 0$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-181-investigating-in-how-many-ways-objects-of-two-different-colours-can-be-grouped.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-181-investigating-in-how-many-ways-objects-of-two-different-colours-can-be-grouped.md
index d23abc56409..f98d3a71b9e 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-181-investigating-in-how-many-ways-objects-of-two-different-colours-can-be-grouped.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-181-investigating-in-how-many-ways-objects-of-two-different-colours-can-be-grouped.md
@@ -1,8 +1,7 @@
 ---
 id: 5900f4231000cf542c50ff34
 title: >-
-  Problem 181: Investigating in how many ways objects of two different colours
-  can be grouped
+  Problem 181: Investigating in how many ways objects of two different colours can be grouped
 challengeType: 1
 forumTopicId: 301817
 dashedName: >-
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-182-rsa-encryption.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-182-rsa-encryption.md
index 2d45244cc5c..e971434b3e7 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-182-rsa-encryption.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-182-rsa-encryption.md
@@ -10,26 +10,15 @@ dashedName: problem-182-rsa-encryption
 
 The RSA encryption is based on the following procedure:
 
-Generate two distinct primes `p` and `q`.
-Compute `n=p*q` and `φ=(p-1)(q-1)`.
-Find an integer `e`, `1 < e < φ`, such that `gcd(e,φ) = 1`
+Generate two distinct primes `p` and `q`. Compute `n=p*q` and `φ=(p-1)(q-1)`. Find an integer `e`, `1 < e < φ`, such that `gcd(e,φ) = 1`
 
-A message in this system is a number in the interval `[0,n-1]`.
-A text to be encrypted is then somehow converted to messages (numbers in the interval `[0,n-1]`).
-To encrypt the text, for each message, `m`, c=m<sup>e</sup> mod n is calculated.
+A message in this system is a number in the interval `[0,n-1]`. A text to be encrypted is then somehow converted to messages (numbers in the interval `[0,n-1]`). To encrypt the text, for each message, `m`, c=m<sup>e</sup> mod n is calculated.
 
 To decrypt the text, the following procedure is needed: calculate `d` such that `ed=1 mod φ`, then for each encrypted message, `c`, calculate m=c<sup>d</sup> mod n.
 
-There exist values of `e` and `m` such that m<sup>e</sup> mod n = m.
-We call messages `m` for which m<sup>e</sup> mod n=m unconcealed messages.
+There exist values of `e` and `m` such that m<sup>e</sup> mod n = m. We call messages `m` for which m<sup>e</sup> mod n=m unconcealed messages.
 
-An issue when choosing `e` is that there should not be too many unconcealed messages.
-For instance, let `p=19` and `q=37`.
-Then `n=19*37=703` and `φ=18*36=648`.
-If we choose `e=181`, then, although `gcd(181,648)=1` it turns out that all possible messages
-m `(0≤m≤n-1)` are unconcealed when calculating m<sup>e</sup> mod n.
-For any valid choice of `e` there exist some unconcealed messages.
-It's important that the number of unconcealed messages is at a minimum.
+An issue when choosing `e` is that there should not be too many unconcealed messages. For instance, let `p=19` and `q=37`. Then `n=19*37=703` and `φ=18*36=648`. If we choose `e=181`, then, although `gcd(181,648)=1` it turns out that all possible messages m `(0≤m≤n-1)` are unconcealed when calculating m<sup>e</sup> mod n. For any valid choice of `e` there exist some unconcealed messages. It's important that the number of unconcealed messages is at a minimum.
 
 For any given `p` and `q`, find the sum of all values of `e`, `1 < e < φ(p,q)` and `gcd(e,φ)=1`, so that the number of unconcealed messages for this value of `e` is at a minimum.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-184-triangles-containing-the-origin.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-184-triangles-containing-the-origin.md
index 98b697822e1..8d3eb0bfc9d 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-184-triangles-containing-the-origin.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-184-triangles-containing-the-origin.md
@@ -12,7 +12,7 @@ Consider the set $I_r$ of points $(x,y)$ with integer coordinates in the interio
 
 For a radius of 2, $I_2$ contains the nine points (0,0), (1,0), (1,1), (0,1), (-1,1), (-1,0), (-1,-1), (0,-1) and (1,-1). There are eight triangles having all three vertices in $I_2$ which contain the origin in the interior. Two of them are shown below, the others are obtained from these by rotation.
 
-<img class="img-responsive center-block" alt="circle with radius 2, centered at the origin, with nine marked points and two triangles - (-1,0), (0,1), (1,-1) and (-1,1), (0,-1), (1,1)" src="https://cdn.freecodecamp.org/curriculum/project-euler/triangles-containing-the-origin.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="circle with radius 2, centered at the origin, with nine marked points and two triangles - (-1,0), (0,1), (1,-1) and (-1,1), (0,-1), (1,1)" src="https://cdn.freecodecamp.org/curriculum/project-euler/triangles-containing-the-origin.gif" style="background-color: white; padding: 10px;" />
 
 For a radius of 3, there are 360 triangles containing the origin in the interior and having all vertices in $I_3$ and for $I_5$ the number is 10600.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-185-number-mind.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-185-number-mind.md
index e7908a7c808..820f0832166 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-185-number-mind.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-185-number-mind.md
@@ -14,43 +14,27 @@ Instead of coloured pegs, you have to guess a secret sequence of digits. After e
 
 For instance, given the following guesses for a 5-digit secret sequence,
 
-$$\begin{align}
-  & 90342 ;2\\;\text{correct}\\\\
-  & 70794 ;0\\;\text{correct}\\\\
-  & 39458 ;2\\;\text{correct}\\\\
-  & 34109 ;1\\;\text{correct}\\\\
-  & 51545 ;2\\;\text{correct}\\\\
-  & 12531 ;1\\;\text{correct}
-\end{align}$$
+$$\begin{align}   & 90342 ;2\\;\text{correct}\\\\
+  & 70794 ;0\\;\text{correct}\\\\   & 39458 ;2\\;\text{correct}\\\\
+  & 34109 ;1\\;\text{correct}\\\\   & 51545 ;2\\;\text{correct}\\\\
+  & 12531 ;1\\;\text{correct} \end{align}$$
 
 The correct sequence 39542 is unique.
 
 Based on the following guesses,
 
-$$\begin{align}
-  & 5616185650518293 ;2\\;\text{correct}\\\\
-  & 3847439647293047 ;1\\;\text{correct}\\\\
-  & 5855462940810587 ;3\\;\text{correct}\\\\
-  & 9742855507068353 ;3\\;\text{correct}\\\\
-  & 4296849643607543 ;3\\;\text{correct}\\\\
-  & 3174248439465858 ;1\\;\text{correct}\\\\
-  & 4513559094146117 ;2\\;\text{correct}\\\\
-  & 7890971548908067 ;3\\;\text{correct}\\\\
-  & 8157356344118483 ;1\\;\text{correct}\\\\
-  & 2615250744386899 ;2\\;\text{correct}\\\\
-  & 8690095851526254 ;3\\;\text{correct}\\\\
-  & 6375711915077050 ;1\\;\text{correct}\\\\
-  & 6913859173121360 ;1\\;\text{correct}\\\\
-  & 6442889055042768 ;2\\;\text{correct}\\\\
-  & 2321386104303845 ;0\\;\text{correct}\\\\
-  & 2326509471271448 ;2\\;\text{correct}\\\\
-  & 5251583379644322 ;2\\;\text{correct}\\\\
-  & 1748270476758276 ;3\\;\text{correct}\\\\
-  & 4895722652190306 ;1\\;\text{correct}\\\\
-  & 3041631117224635 ;3\\;\text{correct}\\\\
-  & 1841236454324589 ;3\\;\text{correct}\\\\
-  & 2659862637316867 ;2\\;\text{correct}
-\end{align}$$
+$$\begin{align}   & 5616185650518293 ;2\\;\text{correct}\\\\
+  & 3847439647293047 ;1\\;\text{correct}\\\\   & 5855462940810587 ;3\\;\text{correct}\\\\
+  & 9742855507068353 ;3\\;\text{correct}\\\\   & 4296849643607543 ;3\\;\text{correct}\\\\
+  & 3174248439465858 ;1\\;\text{correct}\\\\   & 4513559094146117 ;2\\;\text{correct}\\\\
+  & 7890971548908067 ;3\\;\text{correct}\\\\   & 8157356344118483 ;1\\;\text{correct}\\\\
+  & 2615250744386899 ;2\\;\text{correct}\\\\   & 8690095851526254 ;3\\;\text{correct}\\\\
+  & 6375711915077050 ;1\\;\text{correct}\\\\   & 6913859173121360 ;1\\;\text{correct}\\\\
+  & 6442889055042768 ;2\\;\text{correct}\\\\   & 2321386104303845 ;0\\;\text{correct}\\\\
+  & 2326509471271448 ;2\\;\text{correct}\\\\   & 5251583379644322 ;2\\;\text{correct}\\\\
+  & 1748270476758276 ;3\\;\text{correct}\\\\   & 4895722652190306 ;1\\;\text{correct}\\\\
+  & 3041631117224635 ;3\\;\text{correct}\\\\   & 1841236454324589 ;3\\;\text{correct}\\\\
+  & 2659862637316867 ;2\\;\text{correct} \end{align}$$
 
 Find the unique 16-digit secret sequence.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-186-connectedness-of-a-network.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-186-connectedness-of-a-network.md
index d3e4fef7c0b..8d1fed78cdf 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-186-connectedness-of-a-network.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-186-connectedness-of-a-network.md
@@ -11,11 +11,11 @@ dashedName: problem-186-connectedness-of-a-network
 Here are the records from a busy telephone system with one million users:
 
 | RecNr | Caller | Called |
-|-------|--------|--------|
-|   1   | 200007 | 100053 |
-|   2   | 600183 | 500439 |
-|   3   | 600863 | 701497 |
-|  ...  |  ...   |  ...   |
+| ----- | ------ | ------ |
+| 1     | 200007 | 100053 |
+| 2     | 600183 | 500439 |
+| 3     | 600863 | 701497 |
+| ...   | ...    | ...    |
 
 The telephone number of the caller and the called number in record $n$ are $Caller(n) = S_{2n - 1}$ and $Called(n) = S_{2n}$ where ${S}_{1,2,3,\ldots}$ come from the "Lagged Fibonacci Generator":
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-189-tri-colouring-a-triangular-grid.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-189-tri-colouring-a-triangular-grid.md
index 8058ded8ffb..6ac8cedcec5 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-189-tri-colouring-a-triangular-grid.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-189-tri-colouring-a-triangular-grid.md
@@ -10,13 +10,13 @@ dashedName: problem-189-tri-colouring-a-triangular-grid
 
 Consider the following configuration of 64 triangles:
 
-<img class="img-responsive center-block" alt="64 triangles arranged to create larger triangle with side length of 8 triangles" src="https://cdn.freecodecamp.org/curriculum/project-euler/tri-colouring-a-triangular-grid-1.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="64 triangles arranged to create larger triangle with side length of 8 triangles" src="https://cdn.freecodecamp.org/curriculum/project-euler/tri-colouring-a-triangular-grid-1.gif" style="background-color: white; padding: 10px;" />
 
 We wish to colour the interior of each triangle with one of three colours: red, green or blue, so that no two neighbouring triangles have the same colour. Such a colouring shall be called valid. Here, two triangles are said to be neighbouring if they share an edge. Note: if they only share a vertex, then they are not neighbours.
 
 For example, here is a valid colouring of the above grid:
 
-<img class="img-responsive center-block" alt="colored grid of 64 triangles" src="https://cdn.freecodecamp.org/curriculum/project-euler/tri-colouring-a-triangular-grid-2.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="colored grid of 64 triangles" src="https://cdn.freecodecamp.org/curriculum/project-euler/tri-colouring-a-triangular-grid-2.gif" style="background-color: white; padding: 10px;" />
 
 A colouring C' which is obtained from a colouring C by rotation or reflection is considered distinct from C unless the two are identical.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-194-coloured-configurations.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-194-coloured-configurations.md
index fa61151b1ef..4d5b05af3d9 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-194-coloured-configurations.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-194-coloured-configurations.md
@@ -9,8 +9,8 @@ dashedName: problem-194-coloured-configurations
 # --description--
 
 Consider graphs built with the units A:
-<img class="img-responsive" alt="graph unit A" src="https://cdn.freecodecamp.org/curriculum/project-euler/coloured-configurations-1.png" style="display: inline-block; background-color: white; padding: 10px;">
- and B: <img class="img-responsive" alt="graph unit B" src="https://cdn.freecodecamp.org/curriculum/project-euler/coloured-configurations-2.png" style="display: inline-block; background-color: white; padding: 10px;">, where the units are glued along the vertical edges as in the graph <img class="img-responsive" alt="graph with four units glued along the vertical edges" src="https://cdn.freecodecamp.org/curriculum/project-euler/coloured-configurations-3.png" style="display: inline-block; background-color: white; padding: 10px;">.
+<img class="img-responsive" alt="graph unit A" src="https://cdn.freecodecamp.org/curriculum/project-euler/coloured-configurations-1.png" style="display: inline-block; background-color: white; padding: 10px;" />
+ and B: <img class="img-responsive" alt="graph unit B" src="https://cdn.freecodecamp.org/curriculum/project-euler/coloured-configurations-2.png" style="display: inline-block; background-color: white; padding: 10px;" />, where the units are glued along the vertical edges as in the graph <img class="img-responsive" alt="graph with four units glued along the vertical edges" src="https://cdn.freecodecamp.org/curriculum/project-euler/coloured-configurations-3.png" style="display: inline-block; background-color: white; padding: 10px;" />.
 
 A configuration of type $(a,b,c)$ is a graph thus built of $a$ units A and $b$ units B, where the graph's vertices are coloured using up to $c$ colours, so that no two adjacent vertices have the same colour. The compound graph above is an example of a configuration of type $(2,2,6)$, in fact of type $(2,2,c)$ for all $c ≥ 4$
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-196-prime-triplets.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-196-prime-triplets.md
index 6d128e8520e..d072c7689a1 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-196-prime-triplets.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-196-prime-triplets.md
@@ -10,20 +10,13 @@ dashedName: problem-196-prime-triplets
 
 Build a triangle from all positive integers in the following way:
 
-$$\begin{array}{rrr}
-  &  1 \\\\
-  &  \color{red}{2} &  \color{red}{3} \\\\
-  &  4 & \color{red}{5} &  6 \\\\
-  &  \color{red}{7} &  8 &  9 & 10 \\\\
-  & \color{red}{11} & 12 & \color{red}{13} & 14 & 15  \\\\
-  & 16 & \color{red}{17} & 18 & \color{red}{19} & 20 & 21 \\\\
-  & 22 & \color{red}{23} & 24 & 25 & 26 & 27 & 28 \\\\
-  & \color{red}{29} & 30 & \color{red}{31} & 32 & 33 & 34 & 35 & 36 \\\\
-  & \color{red}{37} & 38 & 39 & 40 & \color{red}{41} & 42 & \color{red}{43} & 44 & 45 \\\\
-  & 46 & \color{red}{47} & 48 & 49 & 50 & 51 & 52 & \color{red}{53} & 54 & 55 \\\\
-  & 56 & 57 & 58 & \color{red}{59} & 60 & \color{red}{61} & 62 & 63 & 64 & 65 & 66 \\\\
-  & \cdots
-\end{array}$$
+$$\begin{array}{rrr}   &  1 \\\\
+  &  \color{red}{2} &  \color{red}{3} \\\\   &  4 & \color{red}{5} &  6 \\\\
+  &  \color{red}{7} &  8 &  9 & 10 \\\\   & \color{red}{11} & 12 & \color{red}{13} & 14 & 15  \\\\
+  & 16 & \color{red}{17} & 18 & \color{red}{19} & 20 & 21 \\\\   & 22 & \color{red}{23} & 24 & 25 & 26 & 27 & 28 \\\\
+  & \color{red}{29} & 30 & \color{red}{31} & 32 & 33 & 34 & 35 & 36 \\\\   & \color{red}{37} & 38 & 39 & 40 & \color{red}{41} & 42 & \color{red}{43} & 44 & 45 \\\\
+  & 46 & \color{red}{47} & 48 & 49 & 50 & 51 & 52 & \color{red}{53} & 54 & 55 \\\\   & 56 & 57 & 58 & \color{red}{59} & 60 & \color{red}{61} & 62 & 63 & 64 & 65 & 66 \\\\
+  & \cdots \end{array}$$
 
 Each positive integer has up to eight neighbours in the triangle.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-199-iterative-circle-packing.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-199-iterative-circle-packing.md
index f7a4c56e5aa..5c699d70320 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-199-iterative-circle-packing.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-199-iterative-circle-packing.md
@@ -10,7 +10,7 @@ dashedName: problem-199-iterative-circle-packing
 
 Three circles of equal radius are placed inside a larger circle such that each pair of circles is tangent to one another and the inner circles do not overlap. There are four uncovered "gaps" which are to be filled iteratively with more tangent circles.
 
-<img class="img-responsive center-block" alt="a diagram of non-overlapping circles" src="https://cdn-media-1.freecodecamp.org/project-euler/199-circles-in-circles.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="a diagram of non-overlapping circles" src="https://cdn-media-1.freecodecamp.org/project-euler/199-circles-in-circles.gif" style="background-color: white; padding: 10px;" />
 
 At each iteration, a maximally sized circle is placed in each gap, which creates more gaps for the next iteration. After 3 iterations (pictured), there are 108 gaps and the fraction of the area which is not covered by circles is 0.06790342, rounded to eight decimal places.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-200-find-the-200th-prime-proof-sqube-containing-the-contiguous-sub-string-200.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-200-find-the-200th-prime-proof-sqube-containing-the-contiguous-sub-string-200.md
index f1b73349e32..e35cfa0a550 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-200-find-the-200th-prime-proof-sqube-containing-the-contiguous-sub-string-200.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-101-to-200/problem-200-find-the-200th-prime-proof-sqube-containing-the-contiguous-sub-string-200.md
@@ -1,8 +1,7 @@
 ---
 id: 5900f4351000cf542c50ff47
 title: >-
-  Problem 200: Find the 200th prime-proof sqube containing the contiguous
-  sub-string "200"
+  Problem 200: Find the 200th prime-proof sqube containing the contiguous sub-string "200"
 challengeType: 1
 forumTopicId: 301840
 dashedName: >-
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-201-subsets-with-a-unique-sum.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-201-subsets-with-a-unique-sum.md
index 5637da54304..e0513d008ec 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-201-subsets-with-a-unique-sum.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-201-subsets-with-a-unique-sum.md
@@ -12,28 +12,17 @@ For any set $A$ of numbers, let $sum(A)$ be the sum of the elements of $A$.
 
 Consider the set $B = \\{1,3,6,8,10,11\\}$. There are 20 subsets of $B$ containing three elements, and their sums are:
 
-$$\begin{align}
-  & sum(\\{1,3,6\\}) = 10 \\\\
-  & sum(\\{1,3,8\\}) = 12 \\\\
-  & sum(\\{1,3,10\\}) = 14 \\\\
-  & sum(\\{1,3,11\\}) = 15 \\\\
-  & sum(\\{1,6,8\\}) = 15 \\\\
-  & sum(\\{1,6,10\\}) = 17 \\\\
-  & sum(\\{1,6,11\\}) = 18 \\\\
-  & sum(\\{1,8,10\\}) = 19 \\\\
-  & sum(\\{1,8,11\\}) = 20 \\\\
-  & sum(\\{1,10,11\\}) = 22 \\\\
-  & sum(\\{3,6,8\\}) = 17 \\\\
-  & sum(\\{3,6,10\\}) = 19 \\\\
-  & sum(\\{3,6,11\\}) = 20 \\\\
-  & sum(\\{3,8,10\\}) = 21 \\\\
-  & sum(\\{3,8,11\\}) = 22 \\\\
-  & sum(\\{3,10,11\\}) = 24 \\\\
-  & sum(\\{6,8,10\\}) = 24 \\\\
-  & sum(\\{6,8,11\\}) = 25 \\\\
-  & sum(\\{6,10,11\\}) = 27 \\\\
-  & sum(\\{8,10,11\\}) = 29
-\\end{align}$$
+$$\begin{align}   & sum(\\{1,3,6\\}) = 10 \\\\
+  & sum(\\{1,3,8\\}) = 12 \\\\   & sum(\\{1,3,10\\}) = 14 \\\\
+  & sum(\\{1,3,11\\}) = 15 \\\\   & sum(\\{1,6,8\\}) = 15 \\\\
+  & sum(\\{1,6,10\\}) = 17 \\\\   & sum(\\{1,6,11\\}) = 18 \\\\
+  & sum(\\{1,8,10\\}) = 19 \\\\   & sum(\\{1,8,11\\}) = 20 \\\\
+  & sum(\\{1,10,11\\}) = 22 \\\\   & sum(\\{3,6,8\\}) = 17 \\\\
+  & sum(\\{3,6,10\\}) = 19 \\\\   & sum(\\{3,6,11\\}) = 20 \\\\
+  & sum(\\{3,8,10\\}) = 21 \\\\   & sum(\\{3,8,11\\}) = 22 \\\\
+  & sum(\\{3,10,11\\}) = 24 \\\\   & sum(\\{6,8,10\\}) = 24 \\\\
+  & sum(\\{6,8,11\\}) = 25 \\\\   & sum(\\{6,10,11\\}) = 27 \\\\
+  & sum(\\{8,10,11\\}) = 29 \\end{align}$$
 
 Some of these sums occur more than once, others are unique. For a set $A$, let $U(A,k)$ be the set of unique sums of $k$-element subsets of $A$, in our example we find $U(B,3) = \\{10,12,14,18,21,25,27,29\\}$ and $sum(U(B,3)) = 156$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-202-laserbeam.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-202-laserbeam.md
index 5d916d5c3cf..2090a152b22 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-202-laserbeam.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-202-laserbeam.md
@@ -12,7 +12,7 @@ Three mirrors are arranged in the shape of an equilateral triangle, with their r
 
 Label the vertices $A$, $B$ and $C$. There are 2 ways in which a laser beam may enter vertex $C$, bounce off 11 surfaces, then exit through the same vertex: one way is shown below; the other is the reverse of that.
 
-<img class="img-responsive center-block" alt="one way in which laser beam may enter vertex C, bounce off 11 surfaces and exit through the same vertex" src="https://cdn.freecodecamp.org/curriculum/project-euler/laserbeam.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="one way in which laser beam may enter vertex C, bounce off 11 surfaces and exit through the same vertex" src="https://cdn.freecodecamp.org/curriculum/project-euler/laserbeam.gif" style="background-color: white; padding: 10px;" />
 
 There are 80840 ways in which a laser beam may enter vertex $C$, bounce off 1000001 surfaces, then exit through the same vertex.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-203-squarefree-binomial-coefficients.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-203-squarefree-binomial-coefficients.md
index 8c572981d57..4e418715771 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-203-squarefree-binomial-coefficients.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-203-squarefree-binomial-coefficients.md
@@ -10,17 +10,11 @@ dashedName: problem-203-squarefree-binomial-coefficients
 
 The binomial coefficients $\displaystyle\binom{n}{k}$ can be arranged in triangular form, Pascal's triangle, like this:
 
-$$\begin{array}{ccccccccccccccc}
-   &   &   &   &    &    &    &  1 &    &    &    &   &   &   &   \\\\
-   &   &   &   &    &    &  1 &    & 1  &    &    &   &   &   &   \\\\
-   &   &   &   &    &  1 &    &  2 &    &  1 &    &   &   &   &   \\\\
-   &   &   &   &  1 &    &  3 &    &  3 &    &  1 &   &   &   &   \\\\
-   &   &   & 1 &    &  4 &    &  6 &    &  4 &    & 1 &   &   &   \\\\
-   &   & 1 &   &  5 &    & 10 &    & 10 &    &  5 &   & 1 &   &   \\\\
-   & 1 &   & 6 &    & 15 &    & 20 &    & 15 &    & 6 &   & 1 &   \\\\
- 1 &   & 7 &   & 21 &    & 35 &    & 35 &    & 21 &   & 7 &   & 1 \\\\
-   &   &   &   &    &    &    & \ldots
-\end{array}$$
+$$\begin{array}{ccccccccccccccc}    &   &   &   &    &    &    &  1 &    &    &    &   &   &   &   \\\\
+   &   &   &   &    &    &  1 &    & 1  &    &    &   &   &   &   \\\\    &   &   &   &    &  1 &    &  2 &    &  1 &    &   &   &   &   \\\\
+   &   &   &   &  1 &    &  3 &    &  3 &    &  1 &   &   &   &   \\\\    &   &   & 1 &    &  4 &    &  6 &    &  4 &    & 1 &   &   &   \\\\
+   &   & 1 &   &  5 &    & 10 &    & 10 &    &  5 &   & 1 &   &   \\\\    & 1 &   & 6 &    & 15 &    & 20 &    & 15 &    & 6 &   & 1 &   \\\\
+ 1 &   & 7 &   & 21 &    & 35 &    & 35 &    & 21 &   & 7 &   & 1 \\\\ &   &   &   &    &    &    & \ldots \end{array}$$
 
 It can be seen that the first eight rows of Pascal's triangle contain twelve distinct numbers: 1, 2, 3, 4, 5, 6, 7, 10, 15, 20, 21 and 35.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-207-integer-partition-equations.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-207-integer-partition-equations.md
index 38925650fad..29efa6bc5f6 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-207-integer-partition-equations.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-207-integer-partition-equations.md
@@ -20,17 +20,11 @@ Thus $P(6) = \frac{1}{2}$.
 
 In the following table are listed some values of $P(m)$
 
-$$\begin{align}
-  & P(5) = \frac{1}{1}    \\\\
-  & P(10) = \frac{1}{2}   \\\\
-  & P(15) = \frac{2}{3}   \\\\
-  & P(20) = \frac{1}{2}   \\\\
-  & P(25) = \frac{1}{2}   \\\\
-  & P(30) = \frac{2}{5}   \\\\
-  & \ldots                \\\\
-  & P(180) = \frac{1}{4}  \\\\
-  & P(185) = \frac{3}{13}
-\end{align}$$
+$$\begin{align}   & P(5) = \frac{1}{1}    \\\\
+  & P(10) = \frac{1}{2}   \\\\   & P(15) = \frac{2}{3}   \\\\
+  & P(20) = \frac{1}{2}   \\\\   & P(25) = \frac{1}{2}   \\\\
+  & P(30) = \frac{2}{5}   \\\\   & \ldots                \\\\
+  & P(180) = \frac{1}{4}  \\\\ & P(185) = \frac{3}{13} \end{align}$$
 
 Find the smallest $m$ for which $P(m) &lt; \frac{1}{12\\,345}$
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-208-robot-walks.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-208-robot-walks.md
index 032ec4cec7e..63c4e63cf53 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-208-robot-walks.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-208-robot-walks.md
@@ -12,7 +12,7 @@ A robot moves in a series of one-fifth circular arcs (72°), with a free choice
 
 One of 70932 possible closed paths of 25 arcs starting northward is
 
-<img class="img-responsive center-block" alt="closed path of 25 arcs, starting northward" src="https://cdn.freecodecamp.org/curriculum/project-euler/robot-walks.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="closed path of 25 arcs, starting northward" src="https://cdn.freecodecamp.org/curriculum/project-euler/robot-walks.gif" style="background-color: white; padding: 10px;" />
 
 Given that the robot starts facing North, how many journeys of 70 arcs in length can it take that return it, after the final arc, to its starting position?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-209-circular-logic.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-209-circular-logic.md
index 7556ba3e54d..97190a72f20 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-209-circular-logic.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-209-circular-logic.md
@@ -11,18 +11,18 @@ dashedName: problem-209-circular-logic
 A $k$-input binary truth table is a map from $k$ input bits (binary digits, 0 [false] or 1 [true]) to 1 output bit. For example, the $2$-input binary truth tables for the logical $AND$ and $XOR$ functions are:
 
 | x | y | x AND y |
-|---|---|---------|
-| 0 | 0 |    0    |
-| 0 | 1 |    0    |
-| 1 | 0 |    0    |
-| 1 | 1 |    1    |
+| - | - | ------- |
+| 0 | 0 | 0       |
+| 0 | 1 | 0       |
+| 1 | 0 | 0       |
+| 1 | 1 | 1       |
 
 | x | y | x XOR y |
-|---|---|---------|
-| 0 | 0 |    0    |
-| 0 | 1 |    1    |
-| 1 | 0 |    1    |
-| 1 | 1 |    0    |
+| - | - | ------- |
+| 0 | 0 | 0       |
+| 0 | 1 | 1       |
+| 1 | 0 | 1       |
+| 1 | 1 | 0       |
 
 How many $6$-input binary truth tables, $τ$, satisfy the formula
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-212-combined-volume-of-cuboids.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-212-combined-volume-of-cuboids.md
index 763042d4950..6fd271c483e 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-212-combined-volume-of-cuboids.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-212-combined-volume-of-cuboids.md
@@ -12,14 +12,10 @@ An axis-aligned cuboid, specified by parameters $\{ (x_0,y_0,z_0), (dx,dy,dz) \}
 
 Let $C_1, \ldots, C_{50000}$ be a collection of 50000 axis-aligned cuboids such that $C_n$ has parameters
 
-$$\begin{align}
-  & x_0 = S_{6n - 5} \\; \text{modulo} \\; 10000    \\\\
-  & y_0 = S_{6n - 4} \\; \text{modulo} \\; 10000    \\\\
-  & z_0 = S_{6n - 3} \\; \text{modulo} \\; 10000    \\\\
-  & dx = 1 + (S_{6n - 2} \\; \text{modulo} \\; 399) \\\\
-  & dy = 1 + (S_{6n - 1} \\; \text{modulo} \\; 399) \\\\
-  & dz = 1 + (S_{6n} \\; \text{modulo} \\; 399)     \\\\
-\end{align}$$
+$$\begin{align}   & x_0 = S_{6n - 5} \\; \text{modulo} \\; 10000    \\\\
+  & y_0 = S_{6n - 4} \\; \text{modulo} \\; 10000    \\\\   & z_0 = S_{6n - 3} \\; \text{modulo} \\; 10000    \\\\
+  & dx = 1 + (S_{6n - 2} \\; \text{modulo} \\; 399) \\\\   & dy = 1 + (S_{6n - 1} \\; \text{modulo} \\; 399) \\\\
+  & dz = 1 + (S_{6n} \\; \text{modulo} \\; 399)     \\\\ \end{align}$$
 
 where $S_1, \ldots, S_{300000}$ come from the "Lagged Fibonacci Generator":
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-214-totient-chains.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-214-totient-chains.md
index 3b9e74edfee..497d541bc82 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-214-totient-chains.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-214-totient-chains.md
@@ -12,16 +12,11 @@ Let $φ$ be Euler's totient function, i.e. for a natural number $n$, $φ(n)$ is
 
 By iterating $φ$, each positive integer generates a decreasing chain of numbers ending in 1. E.g. if we start with 5 the sequence 5,4,2,1 is generated. Here is a listing of all chains with length 4:
 
-$$\begin{align}
-   5,4,2,1 & \\\\
-   7,6,2,1 & \\\\
-   8,4,2,1 & \\\\
-   9,6,2,1 & \\\\
-  10,4,2,1 & \\\\
-  12,4,2,1 & \\\\
-  14,6,2,1 & \\\\
-  18,6,2,1 &
-\end{align}$$
+$$\begin{align}    5,4,2,1 & \\\\
+   7,6,2,1 & \\\\    8,4,2,1 & \\\\
+   9,6,2,1 & \\\\   10,4,2,1 & \\\\
+  12,4,2,1 & \\\\   14,6,2,1 & \\\\
+  18,6,2,1 & \end{align}$$
 
 Only two of these chains start with a prime, their sum is 12.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-215-crack-free-walls.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-215-crack-free-walls.md
index 2fec8a79dc7..4e0f214b938 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-215-crack-free-walls.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-215-crack-free-walls.md
@@ -12,7 +12,7 @@ Consider the problem of building a wall out of 2×1 and 3×1 bricks (horizontal
 
 For example, the following 9×3 wall is not acceptable due to the running crack shown in red:
 
-<img class="img-responsive center-block" alt="9x3 wall with one lined up gap between horizontally-adjacent bricks" src="https://cdn.freecodecamp.org/curriculum/project-euler/crack-free-walls.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="9x3 wall with one lined up gap between horizontally-adjacent bricks" src="https://cdn.freecodecamp.org/curriculum/project-euler/crack-free-walls.gif" style="background-color: white; padding: 10px;" />
 
 There are eight ways of forming a crack-free 9×3 wall, written $W(9,3) = 8$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-220-heighway-dragon.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-220-heighway-dragon.md
index c799ec60baf..e58e3c3f3ec 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-220-heighway-dragon.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-220-heighway-dragon.md
@@ -19,7 +19,7 @@ These strings can be interpreted as instructions to a computer graphics program,
 
 Then $D_n$ is an exotic drawing known as the Heighway Dragon of order $n$. For example, $D_{10}$ is shown below; counting each "F" as one step, the highlighted spot at (18,16) is the position reached after 500 steps.
 
-<img class="img-responsive center-block" alt="drawing of the Heighway Dragon after 500 steps" src="https://cdn.freecodecamp.org/curriculum/project-euler/heighway-dragon.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="drawing of the Heighway Dragon after 500 steps" src="https://cdn.freecodecamp.org/curriculum/project-euler/heighway-dragon.gif" style="background-color: white; padding: 10px;" />
 
 What is the position of the cursor after ${10}^{12}$ steps in $D_{50}$? Give your answer as a string in the form `x,y` with no spaces.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-226-a-scoop-of-blancmange.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-226-a-scoop-of-blancmange.md
index 45118281e01..fd8031f2594 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-226-a-scoop-of-blancmange.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-226-a-scoop-of-blancmange.md
@@ -12,7 +12,7 @@ The blancmange curve is the set of points ($x$,$y$) such that $0 ≤ x ≤ 1$ an
 
 The area under the blancmange curve is equal to $\frac{1}{2}$, shown in pink in the diagram below.
 
-<img class="img-responsive center-block" alt="diagram of blancmange curve, with circle C shown on diagram" src="https://cdn.freecodecamp.org/curriculum/project-euler/a-scoop-of-blancmange.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="diagram of blancmange curve, with circle C shown on diagram" src="https://cdn.freecodecamp.org/curriculum/project-euler/a-scoop-of-blancmange.gif" style="background-color: white; padding: 10px;" />
 
 Let $C$ be the circle with centre ($\frac{1}{4}$,$\frac{1}{2}$) and radius $\frac{1}{4}$, shown in black in the diagram.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-228-minkowski-sums.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-228-minkowski-sums.md
index fcbb82920e3..3bccd240ed2 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-228-minkowski-sums.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-228-minkowski-sums.md
@@ -10,10 +10,8 @@ dashedName: problem-228-minkowski-sums
 
 Let $S_n$ be the regular $n$-sided polygon – or shape – whose vertices $v_k (k = 1, 2, \ldots, n)$ have coordinates:
 
-$$\begin{align}
-  & x_k = cos(\frac{2k - 1}{n} × 180°) \\\\
-  & y_k = sin(\frac{2k - 1}{n} × 180°)
-\end{align}$$
+$$\begin{align}   & x_k = cos(\frac{2k - 1}{n} × 180°) \\\\
+  & y_k = sin(\frac{2k - 1}{n} × 180°) \end{align}$$
 
 Each $S_n$ is to be interpreted as a filled shape consisting of all points on the perimeter and in the interior.
 
@@ -21,7 +19,7 @@ The Minkowski sum, $S + T$, of two shapes $S$ and $T$ is the result of adding ev
 
 For example, the sum of $S_3$ and $S_4$ is the six-sided shape shown in pink below:
 
-<img class="img-responsive center-block" alt="image showing S_3, S_4 and S_3 + S_4" src="https://cdn.freecodecamp.org/curriculum/project-euler/minkowski-sums.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="image showing S_3, S_4 and S_3 + S_4" src="https://cdn.freecodecamp.org/curriculum/project-euler/minkowski-sums.png" style="background-color: white; padding: 10px;" />
 
 How many sides does $S_{1864} + S_{1865} + \ldots + S_{1909}$ have?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-229-four-representations-using-squares.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-229-four-representations-using-squares.md
index 1d295a8968b..3903d30320f 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-229-four-representations-using-squares.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-229-four-representations-using-squares.md
@@ -10,23 +10,17 @@ dashedName: problem-229-four-representations-using-squares
 
 Consider the number 3600. It is very special, because
 
-$$\begin{align}
-  & 3600 = {48}^2 + {36}^2   \\\\
-  & 3600 = {20}^2 + {2×40}^2 \\\\
-  & 3600 = {30}^2 + {3×30}^2 \\\\
-  & 3600 = {45}^2 + {7×15}^2 \\\\
-\end{align}$$
+$$\begin{align}   & 3600 = {48}^2 + {36}^2   \\\\
+  & 3600 = {20}^2 + {2×40}^2 \\\\   & 3600 = {30}^2 + {3×30}^2 \\\\
+  & 3600 = {45}^2 + {7×15}^2 \\\\ \end{align}$$
 
 Similarly, we find that $88201 = {99}^2 + {280}^2 = {287}^2 + 2 × {54}^2 = {283}^2 + 3 × {52}^2 = {197}^2 + 7 × {84}^2$.
 
 In 1747, Euler proved which numbers are representable as a sum of two squares. We are interested in the numbers $n$ which admit representations of all of the following four types:
 
-$$\begin{align}
-  & n = {a_1}^2 + {b_1}^2  \\\\
-  & n = {a_2}^2 + 2{b_2}^2 \\\\
-  & n = {a_3}^2 + 3{b_3}^2 \\\\
-  & n = {a_7}^2 + 7{b_7}^2 \\\\
-\end{align}$$
+$$\begin{align}   & n = {a_1}^2 + {b_1}^2  \\\\
+  & n = {a_2}^2 + 2{b_2}^2 \\\\   & n = {a_3}^2 + 3{b_3}^2 \\\\
+  & n = {a_7}^2 + 7{b_7}^2 \\\\ \end{align}$$
 
 where the $a_k$ and $b_k$ are positive integers.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-230-fibonacci-words.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-230-fibonacci-words.md
index 92fa72ed62c..5b2f18205ac 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-230-fibonacci-words.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-230-fibonacci-words.md
@@ -12,35 +12,27 @@ For any two strings of digits, $A$ and $B$, we define $F_{A,B}$ to be the sequen
 
 Further, we define $D_{A,B}(n)$ to be the $n^{\text{th}}$ digit in the first term of $F_{A,B}$ that contains at least $n$ digits.
 
-Example:
+예:
 
 Let $A = 1\\,415\\,926\\,535$, $B = 8\\,979\\,323\\,846$. We wish to find $D_{A,B}(35)$, say.
 
 The first few terms of $F_{A,B}$ are:
 
-$$\begin{align}
-  & 1\\,415\\,926\\,535 \\\\
-  & 8\\,979\\,323\\,846 \\\\
-  & 14\\,159\\,265\\,358\\,979\\,323\\,846 \\\\
-  & 897\\,932\\,384\\,614\\,159\\,265\\,358\\,979\\,323\\,846 \\\\
-  & 14\\,159\\,265\\,358\\,979\\,323\\,846\\,897\\,932\\,384\\,614\\,15\color{red}{9}\\,265\\,358\\,979\\,323\\,846
-\end{align}$$
+$$\begin{align}   & 1\\,415\\,926\\,535 \\\\
+  & 8\\,979\\,323\\,846 \\\\   & 14\\,159\\,265\\,358\\,979\\,323\\,846 \\\\
+  & 897\\,932\\,384\\,614\\,159\\,265\\,358\\,979\\,323\\,846 \\\\ & 14\\,159\\,265\\,358\\,979\\,323\\,846\\,897\\,932\\,384\\,614\\,15\color{red}{9}\\,265\\,358\\,979\\,323\\,846 \end{align}$$
 
 Then $D_{A,B}(35)$ is the ${35}^{\text{th}}$ digit in the fifth term, which is 9.
 
 Now we use for $A$ the first 100 digits of $π$ behind the decimal point:
 
-$$\begin{align}
-  & 14\\,159\\,265\\,358\\,979\\,323\\,846\\,264\\,338\\,327\\,950\\,288\\,419\\,716\\,939\\,937\\,510 \\\\
-  & 58\\,209\\,749\\,445\\,923\\,078\\,164\\,062\\,862\\,089\\,986\\,280\\,348\\,253\\,421\\,170\\,679
-\end{align}$$
+$$\begin{align}   & 14\\,159\\,265\\,358\\,979\\,323\\,846\\,264\\,338\\,327\\,950\\,288\\,419\\,716\\,939\\,937\\,510 \\\\
+  & 58\\,209\\,749\\,445\\,923\\,078\\,164\\,062\\,862\\,089\\,986\\,280\\,348\\,253\\,421\\,170\\,679 \end{align}$$
 
 and for $B$ the next hundred digits:
 
-$$\begin{align}
-  & 82\\,148\\,086\\,513\\,282\\,306\\,647\\,093\\,844\\,609\\,550\\,582\\,231\\,725\\,359\\,408\\,128 \\\\
-  & 48\\,111\\,745\\,028\\,410\\,270\\,193\\,852\\,110\\,555\\,964\\,462\\,294\\,895\\,493\\,038\\,196
-\end{align}$$
+$$\begin{align}   & 82\\,148\\,086\\,513\\,282\\,306\\,647\\,093\\,844\\,609\\,550\\,582\\,231\\,725\\,359\\,408\\,128 \\\\
+  & 48\\,111\\,745\\,028\\,410\\,270\\,193\\,852\\,110\\,555\\,964\\,462\\,294\\,895\\,493\\,038\\,196 \end{align}$$
 
 Find $\sum_{n = 0, 1, \ldots, 17} {10}^n × D_{A,B}((127 + 19n) × 7^n)$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-236-luxury-hampers.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-236-luxury-hampers.md
index f577307aee9..2ae12a0ab04 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-236-luxury-hampers.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-236-luxury-hampers.md
@@ -10,12 +10,12 @@ dashedName: problem-236-luxury-hampers
 
 Suppliers 'A' and 'B' provided the following numbers of products for the luxury hamper market:
 
-|       Product      | 'A'  | 'B'  |
-|--------------------|------|------|
-|    Beluga Caviar   | 5248 | 640  |
-|    Christmas Cake  | 1312 | 1888 |
-|    Gammon Joint    | 2624 | 3776 |
-|    Vintage Port    | 5760 | 3776 |
+| Product            | 'A'  | 'B'  |
+| ------------------ | ---- | ---- |
+| Beluga Caviar      | 5248 | 640  |
+| Christmas Cake     | 1312 | 1888 |
+| Gammon Joint       | 2624 | 3776 |
+| Vintage Port       | 5760 | 3776 |
 | Champagne Truffles | 3936 | 5664 |
 
 Although the suppliers try very hard to ship their goods in perfect condition, there is inevitably some spoilage - i.e. products gone bad.
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-237-tours-on-a-4-x-n-playing-board.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-237-tours-on-a-4-x-n-playing-board.md
index ba032576e8c..ef7c2a30c04 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-237-tours-on-a-4-x-n-playing-board.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-237-tours-on-a-4-x-n-playing-board.md
@@ -17,7 +17,7 @@ Let $T(n)$ be the number of tours over a 4 × $n$ playing board such that:
 
 The diagram shows one tour over a 4 × 10 board:
 
-<img class="img-responsive center-block" alt="one tour over 4 x 10 board" src="https://cdn.freecodecamp.org/curriculum/project-euler/tours-on-a-4-x-n-playing-board.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="one tour over 4 x 10 board" src="https://cdn.freecodecamp.org/curriculum/project-euler/tours-on-a-4-x-n-playing-board.gif" style="background-color: white; padding: 10px;" />
 
 $T(10)$ is 2329. What is $T({10}^{12})$ modulo ${10}^8$?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-238-infinite-string-tour.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-238-infinite-string-tour.md
index 52dd3f15143..6f49452d838 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-238-infinite-string-tour.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-238-infinite-string-tour.md
@@ -10,10 +10,8 @@ dashedName: problem-238-infinite-string-tour
 
 Create a sequence of numbers using the "Blum Blum Shub" pseudo-random number generator:
 
-$$
-s_0 = 14025256 \\\\
-s_{n + 1} = {s_n}^2 \\; mod \\; 20\\,300\\,713
-$$
+$$ s_0 = 14025256 \\\\
+s_{n + 1} = {s_n}^2 \\; mod \\; 20\\,300\\,713 $$
 
 Concatenate these numbers $s_0s_1s_2\ldots$ to create a string $w$ of infinite length. Then, $w = 14025256741014958470038053646\ldots$
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-240-top-dice.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-240-top-dice.md
index 3a49399014c..97f89f17305 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-240-top-dice.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-240-top-dice.md
@@ -10,12 +10,9 @@ dashedName: problem-240-top-dice
 
 There are 1111 ways in which five 6-sided dice (sides numbered 1 to 6) can be rolled so that the top three sum to 15. Some examples are:
 
-$$\begin{align}
-  & D_1,D_2,D_3,D_4,D_5 = 4,3,6,3,5 \\\\
-  & D_1,D_2,D_3,D_4,D_5 = 4,3,3,5,6 \\\\
-  & D_1,D_2,D_3,D_4,D_5 = 3,3,3,6,6 \\\\
-  & D_1,D_2,D_3,D_4,D_5 = 6,6,3,3,3
-\end{align}$$
+$$\begin{align}   & D_1,D_2,D_3,D_4,D_5 = 4,3,6,3,5 \\\\
+  & D_1,D_2,D_3,D_4,D_5 = 4,3,3,5,6 \\\\   & D_1,D_2,D_3,D_4,D_5 = 3,3,3,6,6 \\\\
+  & D_1,D_2,D_3,D_4,D_5 = 6,6,3,3,3 \end{align}$$
 
 In how many ways can twenty 12-sided dice (sides numbered 1 to 12) be rolled so that the top ten sum to 70?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-244-sliders.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-244-sliders.md
index dab5b245135..ebe4a76b838 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-244-sliders.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-244-sliders.md
@@ -12,31 +12,21 @@ You probably know the game Fifteen Puzzle. Here, instead of numbered tiles, we h
 
 A move is denoted by the uppercase initial of the direction (Left, Right, Up, Down) in which the tile is slid, e.g. starting from configuration ($S$), by the sequence $LULUR$ we reach the configuration ($E$):
 
-($S$) <img class="img-responsive" alt="configuration S" src="https://cdn.freecodecamp.org/curriculum/project-euler/sliders-1.gif" style="display: inline-block; background-color: white; padding: 10px;">, ($E$) <img class="img-responsive" alt="configuration E" src="https://cdn.freecodecamp.org/curriculum/project-euler/sliders-2.gif" style="display: inline-block; background-color: white; padding: 10px;">
+($S$) <img class="img-responsive" alt="configuration S" src="https://cdn.freecodecamp.org/curriculum/project-euler/sliders-1.gif" style="display: inline-block; background-color: white; padding: 10px;" />, ($E$) <img class="img-responsive" alt="configuration E" src="https://cdn.freecodecamp.org/curriculum/project-euler/sliders-2.gif" style="display: inline-block; background-color: white; padding: 10px;" />
 
 For each path, its checksum is calculated by (pseudocode):
 
-$$\begin{align}
-  & \text{checksum} = 0 \\\\
-  & \text{checksum} = (\text{checksum} × 243 + m_1) \\; \text{mod} \\; 100\\,000\\,007 \\\\
-  & \text{checksum} = (\text{checksum} × 243 + m_2) \\; \text{mod} \\; 100\\,000\\,007 \\\\
-  & \ldots \\\\
-  & \text{checksum} = (\text{checksum} × 243 + m_n) \\; \text{mod} \\; 100\\,000\\,007
-\end{align}$$
+$$\begin{align}   & \text{checksum} = 0 \\\\
+  & \text{checksum} = (\text{checksum} × 243 + m_1) \\; \text{mod} \\; 100\\,000\\,007 \\\\   & \text{checksum} = (\text{checksum} × 243 + m_2) \\; \text{mod} \\; 100\\,000\\,007 \\\\
+  & \ldots \\\\ & \text{checksum} = (\text{checksum} × 243 + m_n) \\; \text{mod} \\; 100\\,000\\,007 \end{align}$$
 
 where $m_k$ is the ASCII value of the $k^{\text{th}}$ letter in the move sequence and the ASCII values for the moves are:
 
-$$\begin{array}{|c|c|}
-  \hline
-  L & 76 \\\\ \hline
-  R & 82 \\\\ \hline
-  U & 85 \\\\ \hline
-  D & 68 \\\\ \hline
-\end{array}$$
+$$\begin{array}{|c|c|} \hline L & 76 \\\\ \hline R & 82 \\\\ \hline U & 85 \\\\ \hline D & 68 \\\\ \hline \end{array}$$
 
 For the sequence $LULUR$ given above, the checksum would be 19761398. Now, starting from configuration ($S$), find all shortest ways to reach configuration ($T$).
 
-($S$) <img class="img-responsive center-block" alt="configuration S" src="https://cdn.freecodecamp.org/curriculum/project-euler/sliders-3.gif" style="display: inline-block; background-color: white; padding: 10px;">, ($T$) <img class="img-responsive center-block" alt="configuration T" src="https://cdn.freecodecamp.org/curriculum/project-euler/sliders-4.gif" style="display: inline-block; background-color: white; padding: 10px;">
+($S$) <img class="img-responsive center-block" alt="configuration S" src="https://cdn.freecodecamp.org/curriculum/project-euler/sliders-3.gif" style="display: inline-block; background-color: white; padding: 10px;" />, ($T$) <img class="img-responsive center-block" alt="configuration T" src="https://cdn.freecodecamp.org/curriculum/project-euler/sliders-4.gif" style="display: inline-block; background-color: white; padding: 10px;" />
 
 What is the sum of all checksums for the paths having the minimal length?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-246-tangents-to-an-ellipse.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-246-tangents-to-an-ellipse.md
index 14d2bf86670..16c5d89e23b 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-246-tangents-to-an-ellipse.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-246-tangents-to-an-ellipse.md
@@ -14,7 +14,7 @@ Given a circle $c$ with centre $M$ and radius $r$ and a point $G$ such that $d(G
 
 The construction of the points of the ellipse is shown below.
 
-<img class="img-responsive center-block" alt="animation of ellipse construction" src="https://cdn.freecodecamp.org/curriculum/project-euler/tangents-to-an-ellipse-1.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="animation of ellipse construction" src="https://cdn.freecodecamp.org/curriculum/project-euler/tangents-to-an-ellipse-1.gif" style="background-color: white; padding: 10px;" />
 
 Given are the points $M(-2000, 1500)$ and $G(8000, 1500)$.
 
@@ -26,7 +26,7 @@ From a point $P$ outside $e$ the two tangents $t_1$ and $t_2$ to the ellipse are
 
 Let the points where $t_1$ and $t_2$ touch the ellipse be $R$ and $S$.
 
-<img class="img-responsive center-block" alt="circle c with the centre M, radius 15000, and point P outsie of ellipse e; from point P two tangents t_1 and t_2 are drawn to the ellipse, with points touching ellipse are R and S" src="https://cdn.freecodecamp.org/curriculum/project-euler/tangents-to-an-ellipse-2.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="circle c with the centre M, radius 15000, and point P outsie of ellipse e; from point P two tangents t_1 and t_2 are drawn to the ellipse, with points touching ellipse are R and S" src="https://cdn.freecodecamp.org/curriculum/project-euler/tangents-to-an-ellipse-2.gif" style="background-color: white; padding: 10px;" />
 
 For how many lattice points $P$ is angle $RPS$ greater than 45°?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-247-squares-under-a-hyperbola.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-247-squares-under-a-hyperbola.md
index 14d728074a4..63433a02e37 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-247-squares-under-a-hyperbola.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-247-squares-under-a-hyperbola.md
@@ -16,7 +16,7 @@ Let $S_2$ be the largest square that fits in the remaining area, and so on.
 
 Let the index of $S_n$ be the pair (left, below) indicating the number of squares to the left of $S_n$ and the number of squares below $S_n$.
 
-<img class="img-responsive center-block" alt="diagram with squares under the hyperbola" src="https://cdn.freecodecamp.org/curriculum/project-euler/squares-under-a-hyperbola.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="diagram with squares under the hyperbola" src="https://cdn.freecodecamp.org/curriculum/project-euler/squares-under-a-hyperbola.gif" style="background-color: white; padding: 10px;" />
 
 The diagram shows some such squares labeled by number.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-252-convex-holes.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-252-convex-holes.md
index e275539e846..ec671c067aa 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-252-convex-holes.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-252-convex-holes.md
@@ -12,15 +12,12 @@ Given a set of points on a plane, we define a convex hole to be a convex polygon
 
 As an example, the image below shows a set of twenty points and a few such convex holes. The convex hole shown as a red heptagon has an area equal to 1049694.5 square units, which is the highest possible area for a convex hole on the given set of points.
 
-<img class="img-responsive center-block" alt="set of twenty points and convex holes on plane" src="https://cdn.freecodecamp.org/curriculum/project-euler/convex-holes.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="set of twenty points and convex holes on plane" src="https://cdn.freecodecamp.org/curriculum/project-euler/convex-holes.gif" style="background-color: white; padding: 10px;" />
 
 For our example, we used the first 20 points ($T_{2k − 1}$, $T_{2k}$), for $k = 1, 2, \ldots, 20$, produced with the pseudo-random number generator:
 
-$$\begin{align}
-  S_0 & = 290\\,797 \\\\
-  S_{n+1} & = {S_n}^2 \\; \text{mod} \\; 50\\,515\\,093 \\\\
-  T_n & = (S_n \\; \text{mod} \\; 2000) − 1000
-\end{align}$$
+$$\begin{align}   S_0 & = 290\\,797 \\\\
+  S_{n+1} & = {S_n}^2 \\; \text{mod} \\; 50\\,515\\,093 \\\\ T_n & = (S_n \\; \text{mod} \\; 2000) − 1000 \end{align}$$
 
 i.e. (527, 144), (−488, 732), (−454, −947), …
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-253-tidying-up.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-253-tidying-up.md
index 1afe16e9182..3dbeca51b38 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-253-tidying-up.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-253-tidying-up.md
@@ -17,25 +17,25 @@ As the caterpillar is built up in this way, it forms distinct segments that grad
 For example:
 
 | Piece Placed | Segments So Far |
-| -------------|-----------------|
-|       12     |        1        |
-|        4     |        2        |
-|       29     |        3        |
-|        6     |        4        |
-|       34     |        5        |
-|        5     |        4        |
-|       35     |        4        |
-|       …      |        …        |
+| ------------ | --------------- |
+| 12           | 1               |
+| 4            | 2               |
+| 29           | 3               |
+| 6            | 4               |
+| 34           | 5               |
+| 5            | 4               |
+| 35           | 4               |
+| …            | …               |
 
 Let $M$ be the maximum number of segments encountered during a random tidy-up of the caterpillar. For a caterpillar of ten pieces, the number of possibilities for each $M$ is
 
 | M | Possibilities |
-|---|---------------|
-| 1 |      512      |
-| 2 |     250912    |
-| 3 |    1815264    |
-| 4 |    1418112    |
-| 5 |     144000    |
+| - | ------------- |
+| 1 | 512           |
+| 2 | 250912        |
+| 3 | 1815264       |
+| 4 | 1418112       |
+| 5 | 144000        |
 
 so the most likely value of $M$ is 3 and the average value is $\frac{385\\,643}{113\\,400} = 3.400732$, rounded to six decimal places.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-256-tatami-free-rooms.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-256-tatami-free-rooms.md
index 2788c2ec33e..170443188b8 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-256-tatami-free-rooms.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-256-tatami-free-rooms.md
@@ -16,7 +16,7 @@ For this problem, we consider only rectangular rooms with integer dimensions $a$
 
 There is one rule to follow when laying out tatami: there must be no points where corners of four different mats meet. For example, consider the two arrangements below for a 4×4 room:
 
-<img class="img-responsive center-block" alt="two arrangements of mats in 4x4 room" src="https://cdn.freecodecamp.org/curriculum/project-euler/tatami-free-rooms.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="two arrangements of mats in 4x4 room" src="https://cdn.freecodecamp.org/curriculum/project-euler/tatami-free-rooms.gif" style="background-color: white; padding: 10px;" />
 
 The arrangement on the left is acceptable, whereas the one on the right is not: a red "<strong><span style="color: red;">X</span></strong>" in the middle, marks the point where four tatami meet.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-257-angular-bisectors.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-257-angular-bisectors.md
index 3b4fe6d7708..60864ac52e1 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-257-angular-bisectors.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-257-angular-bisectors.md
@@ -12,7 +12,7 @@ Given is an integer sided triangle $ABC$ with sides $a ≤ b ≤ c$ ($AB = c$, $
 
 The angular bisectors of the triangle intersect the sides at points $E$, $F$ and $G$ (see picture below).
 
-<img class="img-responsive center-block" alt="triangle ABC, with angular bisectors intersecting sides at the points E, F and G" src="https://cdn.freecodecamp.org/curriculum/project-euler/angular-bisectors.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="triangle ABC, with angular bisectors intersecting sides at the points E, F and G" src="https://cdn.freecodecamp.org/curriculum/project-euler/angular-bisectors.gif" style="background-color: white; padding: 10px;" />
 
 The segments $EF$, $EG$ and $FG$ partition the triangle $ABC$ into four smaller triangles: $AEG$, $BFE$, $CGF$ and $EFG$. It can be proven that for each of these four triangles the ratio $\frac{\text{area}(ABC)}{\text{area}(\text{subtriangle})}$ is rational. However, there exist triangles for which some or all of these ratios are integral.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-261-pivotal-square-sums.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-261-pivotal-square-sums.md
index 21b58c42559..af6e1b5aa27 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-261-pivotal-square-sums.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-261-pivotal-square-sums.md
@@ -14,12 +14,9 @@ $${(k - m)}^2 + \ldots + k^2 = {(n + 1)}^2 + \ldots + {(n + m)}^2$$
 
 Some small square-pivots are
 
-$$\begin{align}
-  & \mathbf{4}: 3^2 + \mathbf{4}^2 = 5^2 \\\\
-  & \mathbf{21}: {20}^2 + \mathbf{21}^2 = {29}^2 \\\\
-  & \mathbf{24}: {21}^2 + {22}^2 + {23}^2 + \mathbf{24}^2 = {25}^2 + {26}^2 + {27}^2 \\\\
-  & \mathbf{110}: {108}^2 + {109}^2 + \mathbf{110}^2 = {133}^2 + {134}^2 \\\\
-\end{align}$$
+$$\begin{align}   & \mathbf{4}: 3^2 + \mathbf{4}^2 = 5^2 \\\\
+  & \mathbf{21}: {20}^2 + \mathbf{21}^2 = {29}^2 \\\\   & \mathbf{24}: {21}^2 + {22}^2 + {23}^2 + \mathbf{24}^2 = {25}^2 + {26}^2 + {27}^2 \\\\
+  & \mathbf{110}: {108}^2 + {109}^2 + \mathbf{110}^2 = {133}^2 + {134}^2 \\\\ \end{align}$$
 
 Find the sum of all distinct square-pivots $≤ {10}^{10}$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-265-binary-circles.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-265-binary-circles.md
index 44edab86345..4262d97c798 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-265-binary-circles.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-265-binary-circles.md
@@ -12,7 +12,7 @@ $2^N$ binary digits can be placed in a circle so that all the $N$-digit clockwis
 
 For $N = 3$, two such circular arrangements are possible, ignoring rotations:
 
-<img class="img-responsive center-block" alt="two circular arrangements for N = 3" src="https://cdn.freecodecamp.org/curriculum/project-euler/binary-circles.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="two circular arrangements for N = 3" src="https://cdn.freecodecamp.org/curriculum/project-euler/binary-circles.gif" style="background-color: white; padding: 10px;" />
 
 For the first arrangement, the 3-digit subsequences, in clockwise order, are: 000, 001, 010, 101, 011, 111, 110 and 100.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-268-counting-numbers-with-at-least-four-distinct-prime-factors-less-than-100.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-268-counting-numbers-with-at-least-four-distinct-prime-factors-less-than-100.md
index 553550d2da8..bd295d89e67 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-268-counting-numbers-with-at-least-four-distinct-prime-factors-less-than-100.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-268-counting-numbers-with-at-least-four-distinct-prime-factors-less-than-100.md
@@ -1,8 +1,7 @@
 ---
 id: 5900f4791000cf542c50ff8b
 title: >-
-  Problem 268: Counting numbers with at least four distinct prime factors less
-  than 100
+  Problem 268: Counting numbers with at least four distinct prime factors less than 100
 challengeType: 1
 forumTopicId: 301917
 dashedName: >-
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-270-cutting-squares.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-270-cutting-squares.md
index 0f495dbd40f..0458e257f05 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-270-cutting-squares.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-270-cutting-squares.md
@@ -16,7 +16,7 @@ A square piece of paper with integer dimensions $N×N$ is placed with a corner a
 
 Counting any reflections or rotations as distinct, we call $C(N)$ the number of ways to cut an $N×N$ square. For example, $C(1) = 2$ and $C(2) = 30$ (shown below).
 
-<img class="img-responsive center-block" alt="ways to cut 2x2 square, counting reflections and rotations as distinct" src="https://cdn.freecodecamp.org/curriculum/project-euler/cutting-squares.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="ways to cut 2x2 square, counting reflections and rotations as distinct" src="https://cdn.freecodecamp.org/curriculum/project-euler/cutting-squares.gif" style="background-color: white; padding: 10px;" />
 
 What is $C(30)\bmod {10}^8$ ?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-275-balanced-sculptures.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-275-balanced-sculptures.md
index 0ea3a8e1e3b..decc755a9ee 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-275-balanced-sculptures.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-275-balanced-sculptures.md
@@ -17,7 +17,7 @@ Let us define a balanced sculpture of order $n$ as follows:
 
 When counting the sculptures, any arrangements which are simply reflections about the $y$-axis, are <u>not</u> counted as distinct. For example, the 18 balanced sculptures of order 6 are shown below; note that each pair of mirror images (about the $y$-axis) is counted as one sculpture:
 
-<img class="img-responsive center-block" alt="18 balanced sculptures of order 6" src="https://cdn.freecodecamp.org/curriculum/project-euler/balanced-sculptures.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="18 balanced sculptures of order 6" src="https://cdn.freecodecamp.org/curriculum/project-euler/balanced-sculptures.gif" style="background-color: white; padding: 10px;" />
 
 There are 964 balanced sculptures of order 10 and 360505 of order 15.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-281-pizza-toppings.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-281-pizza-toppings.md
index c99d803a255..60b84a893f8 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-281-pizza-toppings.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-281-pizza-toppings.md
@@ -14,7 +14,7 @@ Let $f(m,n)$ denote the number of ways you can have toppings on the pizza with $
 
 Thus, for instance, $f(2,1) = 1$, $f(2,2) = f(3,1) = 2$ and $f(3,2) = 16$. $f(3,2)$ is shown below:
 
-<img class="img-responsive center-block" alt="animation with 16 ways to have 3 different toppings on 2 slices each" src="https://cdn.freecodecamp.org/curriculum/project-euler/pizza-toppings.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="animation with 16 ways to have 3 different toppings on 2 slices each" src="https://cdn.freecodecamp.org/curriculum/project-euler/pizza-toppings.gif" style="background-color: white; padding: 10px;" />
 
 Find the sum of all $f(m,n)$ such that $f(m,n) ≤ {10}^{15}$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-282-the-ackermann-function.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-282-the-ackermann-function.md
index 1d1cb0426b6..c9cbb75087d 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-282-the-ackermann-function.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-282-the-ackermann-function.md
@@ -10,12 +10,8 @@ dashedName: problem-282-the-ackermann-function
 
 For non-negative integers $m$, $n$, the Ackermann function $A(m, n)$ is defined as follows:
 
-$$A(m, n) =
-\begin{cases}
-n + 1                 & \text{if $m = 0$}             \\\\
-A(m - 1, 1)           & \text{if $m > 0$ and $n = 0$} \\\\
-A(m - 1, A(m, n - 1)) & \text{if $m > 0$ and $n > 0$}
-\end{cases}$$
+$$A(m, n) = \begin{cases} n + 1                 & \text{if $m = 0$}             \\\\
+A(m - 1, 1)           & \text{if $m > 0$ and $n = 0$} \\\\ A(m - 1, A(m, n - 1)) & \text{if $m > 0$ and $n > 0$} \end{cases}$$
 
 For example $A(1, 0) = 2$, $A(2, 2) = 7$ and $A(3, 4) = 125$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-287-quadtree-encoding-a-simple-compression-algorithm.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-287-quadtree-encoding-a-simple-compression-algorithm.md
index 0016dd73f29..707a6fa97e7 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-287-quadtree-encoding-a-simple-compression-algorithm.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-287-quadtree-encoding-a-simple-compression-algorithm.md
@@ -19,7 +19,7 @@ The quadtree encoding allows us to describe a $2^N×2^N$ black and white image a
 
 Consider the following 4×4 image (colored marks denote places where a split can occur):
 
-<img class="img-responsive center-block" alt="4x4 image with colored marks denoting place where split can occur" src="https://cdn.freecodecamp.org/curriculum/project-euler/quadtree-encoding-a-simple-compression-algorithm.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="4x4 image with colored marks denoting place where split can occur" src="https://cdn.freecodecamp.org/curriculum/project-euler/quadtree-encoding-a-simple-compression-algorithm.gif" style="background-color: white; padding: 10px;" />
 
 This image can be described by several sequences, for example : "<strong><span style="color: red">0</span></strong><strong><span style="color: blue">0</span></strong>10101010<strong><span style="color: green">0</span></strong>1011111011<strong><span style="color: orange">0</span></strong>10101010", of length 30, or "<strong><span style="color: red">0</span></strong>10<strong><span style="color: green">0</span></strong>101111101110", of length 16, which is the minimal sequence for this image.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-288-an-enormous-factorial.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-288-an-enormous-factorial.md
index fd30ed566d7..cd92a15cd8c 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-288-an-enormous-factorial.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-288-an-enormous-factorial.md
@@ -10,11 +10,8 @@ dashedName: problem-288-an-enormous-factorial
 
 For any prime $p$ the number $N(p,q)$ is defined by $N(p,q) = \sum_{n=0}^q T_n \times p^n$ with $T_n$ generated by the following random number generator:
 
-$$\begin{align}
-  & S_0 = 290797 \\\\
-  & S_{n + 1} = {S_n}^2\bmod 50\\,515\\,093 \\\\
-  & T_n = S_n\bmod p
-\end{align}$$
+$$\begin{align}   & S_0 = 290797 \\\\
+  & S_{n + 1} = {S_n}^2\bmod 50\\,515\\,093 \\\\ & T_n = S_n\bmod p \end{align}$$
 
 Let $Nfac(p,q)$ be the factorial of $N(p,q)$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-289-eulerian-cycles.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-289-eulerian-cycles.md
index f45f837d698..e491cab3612 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-289-eulerian-cycles.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-289-eulerian-cycles.md
@@ -16,7 +16,7 @@ An Eulerian cycle on $E(m,n)$ is a closed path that passes through each arc exac
 
 The image below shows $E(3,3)$ and an example of an Eulerian non-crossing path.
 
-<img class="img-responsive center-block" alt="Eulerian cycle E(3, 3) and Eulerian non-crossing path" src="https://cdn.freecodecamp.org/curriculum/project-euler/eulerian-cycles.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="Eulerian cycle E(3, 3) and Eulerian non-crossing path" src="https://cdn.freecodecamp.org/curriculum/project-euler/eulerian-cycles.gif" style="background-color: white; padding: 10px;" />
 
 Let $L(m,n)$ be the number of Eulerian non-crossing paths on $E(m,n)$. For example, $L(1,2) = 2$, $L(2,2) = 37$ and $L(3,3) = 104290$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-295-lenticular-holes.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-295-lenticular-holes.md
index 54ef688e22b..9354ea7c840 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-295-lenticular-holes.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-295-lenticular-holes.md
@@ -16,15 +16,12 @@ We call the convex area enclosed by two circles a lenticular hole if:
 
 Consider the circles:
 
-$$\begin{align}
-  & C_0: x^2 + y^2 = 25 \\\\
-  & C_1: {(x + 4)}^2 + {(y - 4)}^2 = 1 \\\\
-  & C_2: {(x - 12)}^2 + {(y - 4)}^2 = 65
-\end{align}$$
+$$\begin{align}   & C_0: x^2 + y^2 = 25 \\\\
+  & C_1: {(x + 4)}^2 + {(y - 4)}^2 = 1 \\\\ & C_2: {(x - 12)}^2 + {(y - 4)}^2 = 65 \end{align}$$
 
 The circles $C_0$, $C_1$ and $C_2$ are drawn in the picture below.
 
-<img class="img-responsive center-block" alt="C_0, C_1 and C_2 circles" src="https://cdn.freecodecamp.org/curriculum/project-euler/lenticular-holes.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="C_0, C_1 and C_2 circles" src="https://cdn.freecodecamp.org/curriculum/project-euler/lenticular-holes.gif" style="background-color: white; padding: 10px;" />
 
 $C_0$ and $C_1$ form a lenticular hole, as well as $C_0$ and $C_2$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-296-angular-bisector-and-tangent.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-296-angular-bisector-and-tangent.md
index 806828a809c..660d66eabb4 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-296-angular-bisector-and-tangent.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-296-angular-bisector-and-tangent.md
@@ -12,7 +12,7 @@ Given is an integer sided triangle $ABC$ with $BC ≤ AC ≤ AB$. $k$ is the ang
 
 The intersection of $n$ and $k$ is called $E$.
 
-<img class="img-responsive center-block" alt="triangle ABC, with k - the angular bisector of angle ACB, m - tangent at point C, n - line parallel to m through B, and point E - intersection of k and n" src="https://cdn.freecodecamp.org/curriculum/project-euler/angular-bisector-and-tangent.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="triangle ABC, with k - the angular bisector of angle ACB, m - tangent at point C, n - line parallel to m through B, and point E - intersection of k and n" src="https://cdn.freecodecamp.org/curriculum/project-euler/angular-bisector-and-tangent.gif" style="background-color: white; padding: 10px;" />
 
 How many triangles $ABC$ with a perimeter not exceeding $100\\,000$ exist such that $BE$ has integral length?
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-298-selective-amnesia.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-298-selective-amnesia.md
index cc787a72fd2..da401b24b95 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-298-selective-amnesia.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-298-selective-amnesia.md
@@ -15,17 +15,17 @@ Both players start with empty memories. Both players always add new missed numbe
 Example game:
 
 | Turn | Called number | Larry's memory | Larry's score | Robin's memory | Robin's score |
-|------|---------------|---------------:|---------------|----------------|---------------|
-|   1  |       1       |              1 |       0       |              1 |       0       |
-|   2  |       2       |            1,2 |       0       |            1,2 |       0       |
-|   3  |       4       |          1,2,4 |       0       |          1,2,4 |       0       |
-|   4  |       6       |        1,2,4,6 |       0       |        1,2,4,6 |       0       |
-|   5  |       1       |        1,2,4,6 |       1       |        1,2,4,6 |       1       |
-|   6  |       8       |      1,2,4,6,8 |       1       |      1,2,4,6,8 |       1       |
-|   7  |      10       |     1,4,6,8,10 |       1       |     2,4,6,8,10 |       1       |
-|   8  |       2       |     1,2,6,8,10 |       1       |     2,4,6,8,10 |       2       |
-|   9  |       4       |     1,2,4,8,10 |       1       |     2,4,6,8,10 |       3       |
-|  10  |       1       |     1,2,4,8,10 |       2       |     1,4,6,8,10 |       3       |
+| ---- | ------------- | --------------:| ------------- | -------------- | ------------- |
+| 1    | 1             |              1 | 0             | 1              | 0             |
+| 2    | 2             |            1,2 | 0             | 1,2            | 0             |
+| 3    | 4             |          1,2,4 | 0             | 1,2,4          | 0             |
+| 4    | 6             |        1,2,4,6 | 0             | 1,2,4,6        | 0             |
+| 5    | 1             |        1,2,4,6 | 1             | 1,2,4,6        | 1             |
+| 6    | 8             |      1,2,4,6,8 | 1             | 1,2,4,6,8      | 1             |
+| 7    | 10            |     1,4,6,8,10 | 1             | 2,4,6,8,10     | 1             |
+| 8    | 2             |     1,2,6,8,10 | 1             | 2,4,6,8,10     | 2             |
+| 9    | 4             |     1,2,4,8,10 | 1             | 2,4,6,8,10     | 3             |
+| 10   | 1             |     1,2,4,8,10 | 2             | 1,4,6,8,10     | 3             |
 
 Denoting Larry's score by $L$ and Robin's score by $R$, what is the expected value of $|L - R|$ after 50 turns? Give your answer rounded to eight decimal places using the format x.xxxxxxxx .
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-299-three-similar-triangles.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-299-three-similar-triangles.md
index f12f154aea6..5bd781949f5 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-299-three-similar-triangles.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-299-three-similar-triangles.md
@@ -14,7 +14,7 @@ $A(a, 0)$, $B(b, 0)$, $C(0, c)$ and $D(0, d)$, with $0 &lt; a &lt; b$ and $0 &lt
 
 Point $P$, also with integer coordinates, is chosen on the line $AC$ so that the three triangles $ABP$, $CDP$ and $BDP$ are all similar.
 
-<img class="img-responsive center-block" alt="points A, B, C, D and P creating three triangles: ABP, CDP, and BDP" src="https://cdn.freecodecamp.org/curriculum/project-euler/three-similar-triangles.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="points A, B, C, D and P creating three triangles: ABP, CDP, and BDP" src="https://cdn.freecodecamp.org/curriculum/project-euler/three-similar-triangles.gif" style="background-color: white; padding: 10px;" />
 
 It is easy to prove that the three triangles can be similar, only if $a = c$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-300-protein-folding.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-300-protein-folding.md
index 235032ed349..d5f2020b784 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-300-protein-folding.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-201-to-300/problem-300-protein-folding.md
@@ -20,7 +20,7 @@ Natural proteins are folded in three dimensions of course, but we will only cons
 
 The figure below shows two possible ways that our example protein could be folded (H-H contact points are shown with red dots).
 
-<img class="img-responsive center-block" alt="two possible ways to fold example protein" src="https://cdn.freecodecamp.org/curriculum/project-euler/protein-folding.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="two possible ways to fold example protein" src="https://cdn.freecodecamp.org/curriculum/project-euler/protein-folding.gif" style="background-color: white; padding: 10px;" />
 
 The folding on the left has only six H-H contact points, thus it would never occur naturally. On the other hand, the folding on the right has nine H-H contact points, which is optimal for this string.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-306-paper-strip-game.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-306-paper-strip-game.md
index 613af2c38fb..3dd4604bc13 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-306-paper-strip-game.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-306-paper-strip-game.md
@@ -18,7 +18,7 @@ Two players start with a strip of $n$ white squares and they take alternate turn
 - $n = 4$: There are three valid moves for the first player; who is able to win the game by painting the two middle squares.
 - $n = 5$: Four valid moves for the first player (shown below in red); but no matter what the player does, the second player (blue) wins.
 
-<img class="img-responsive center-block" alt="valid starting moves for strip with 5 squares" src="https://cdn.freecodecamp.org/curriculum/project-euler/paper-strip-game.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="valid starting moves for strip with 5 squares" src="https://cdn.freecodecamp.org/curriculum/project-euler/paper-strip-game.gif" style="background-color: white; padding: 10px;" />
 
 So, for $1 ≤ n ≤ 5$, there are 3 values of $n$ for which the first player can force a win.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-309-integer-ladders.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-309-integer-ladders.md
index d7be6f1530d..721b756f533 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-309-integer-ladders.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-309-integer-ladders.md
@@ -10,7 +10,7 @@ dashedName: problem-309-integer-ladders
 
 In the classic "Crossing Ladders" problem, we are given the lengths $x$ and $y$ of two ladders resting on the opposite walls of a narrow, level street. We are also given the height $h$ above the street where the two ladders cross and we are asked to find the width of the street ($w$).
 
-<img class="img-responsive center-block" alt="ladders x and y, crossing at the height h, and resting on opposite walls of the street of width w" src="https://cdn.freecodecamp.org/curriculum/project-euler/integer-ladders.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="ladders x and y, crossing at the height h, and resting on opposite walls of the street of width w" src="https://cdn.freecodecamp.org/curriculum/project-euler/integer-ladders.gif" style="background-color: white; padding: 10px;" />
 
 Here, we are only concerned with instances where all four variables are positive integers. For example, if $x = 70$, $y = 119$ and $h = 30$, we can calculate that $w = 56$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-311-biclinic-integral-quadrilaterals.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-311-biclinic-integral-quadrilaterals.md
index 8337692aa49..97736d98034 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-311-biclinic-integral-quadrilaterals.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-311-biclinic-integral-quadrilaterals.md
@@ -16,7 +16,7 @@ We'll call $ABCD$ a biclinic integral quadrilateral if $AO = CO ≤ BO = DO$.
 
 For example, the following quadrilateral is a biclinic integral quadrilateral: $AB = 19$, $BC = 29$, $CD = 37$, $AD = 43$, $BD = 48$ and $AO = CO = 23$.
 
-<img class="img-responsive center-block" alt="quadrilateral ABCD, with point O, an midpoint of BD" src="https://cdn.freecodecamp.org/curriculum/project-euler/biclinic-integral-quadrilaterals.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="quadrilateral ABCD, with point O, an midpoint of BD" src="https://cdn.freecodecamp.org/curriculum/project-euler/biclinic-integral-quadrilaterals.gif" style="background-color: white; padding: 10px;" />
 
 Let $B(N)$ be the number of distinct biclinic integral quadrilaterals $ABCD$ that satisfy ${AB}^2 + {BC}^2 + {CD}^2 + {AD}^2 ≤ N$. We can verify that $B(10\\,000) = 49$ and $B(1\\,000\\,000) = 38239$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-312-cyclic-paths-on-sierpiski-graphs.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-312-cyclic-paths-on-sierpiski-graphs.md
index d90dc2ae352..122f28f97dc 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-312-cyclic-paths-on-sierpiski-graphs.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-312-cyclic-paths-on-sierpiski-graphs.md
@@ -11,20 +11,17 @@ dashedName: problem-312-cyclic-paths-on-sierpiski-graphs
 - A Sierpiński graph of order-1 ($S_1$) is an equilateral triangle.
 - $S_{n + 1}$ is obtained from $S_n$ by positioning three copies of $S_n$ so that every pair of copies has one common corner.
 
-<img class="img-responsive center-block" alt="Sierpinski graphs of order-1 to order-5" src="https://cdn.freecodecamp.org/curriculum/project-euler/cyclic-paths-on-sierpinski-graphs-1.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="Sierpinski graphs of order-1 to order-5" src="https://cdn.freecodecamp.org/curriculum/project-euler/cyclic-paths-on-sierpinski-graphs-1.gif" style="background-color: white; padding: 10px;" />
 
 Let $C(n)$ be the number of cycles that pass exactly once through all the vertices of $S_n$. For example, $C(3) = 8$ because eight such cycles can be drawn on $S_3$, as shown below:
 
-<img class="img-responsive center-block" alt="eight cycles that pass exactly once through all vertices of S_3" src="https://cdn.freecodecamp.org/curriculum/project-euler/cyclic-paths-on-sierpinski-graphs-2.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="eight cycles that pass exactly once through all vertices of S_3" src="https://cdn.freecodecamp.org/curriculum/project-euler/cyclic-paths-on-sierpinski-graphs-2.gif" style="background-color: white; padding: 10px;" />
 
 It can also be verified that:
 
-$$\begin{align}
-  & C(1) = C(2) = 1 \\\\
-  & C(5) = 71\\,328\\,803\\,586\\,048 \\\\
-  & C(10 000)\bmod {10}^8 = 37\\,652\\,224 \\\\
-  & C(10 000)\bmod {13}^8 = 617\\,720\\,485 \\\\
-\end{align}$$
+$$\begin{align}   & C(1) = C(2) = 1 \\\\
+  & C(5) = 71\\,328\\,803\\,586\\,048 \\\\   & C(10 000)\bmod {10}^8 = 37\\,652\\,224 \\\\
+  & C(10 000)\bmod {13}^8 = 617\\,720\\,485 \\\\ \end{align}$$
 
 Find $C(C(C(10\\,000)))\bmod {13}^8$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-313-sliding-game.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-313-sliding-game.md
index 2b62f881a70..8f5726b71f4 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-313-sliding-game.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-313-sliding-game.md
@@ -10,11 +10,11 @@ dashedName: problem-313-sliding-game
 
 In a sliding game a counter may slide horizontally or vertically into an empty space. The objective of the game is to move the red counter from the top left corner of a grid to the bottom right corner; the space always starts in the bottom right corner. For example, the following sequence of pictures show how the game can be completed in five moves on a 2 by 2 grid.
 
-<img class="img-responsive center-block" alt="completing game in five moves on grid 2x2" src="https://cdn.freecodecamp.org/curriculum/project-euler/sliding-game-1.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="completing game in five moves on grid 2x2" src="https://cdn.freecodecamp.org/curriculum/project-euler/sliding-game-1.gif" style="background-color: white; padding: 10px;" />
 
 Let $S(m, n)$ represent the minimum number of moves to complete the game on an $m$ by $n$ grid. For example, it can be verified that $S(5, 4) = 25$.
 
-<img class="img-responsive center-block" alt="initial grid state and final grid state for game on grid 5x4" src="https://cdn.freecodecamp.org/curriculum/project-euler/sliding-game-2.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="initial grid state and final grid state for game on grid 5x4" src="https://cdn.freecodecamp.org/curriculum/project-euler/sliding-game-2.gif" style="background-color: white; padding: 10px;" />
 
 There are exactly 5482 grids for which $S(m, n) = p^2$, where $p &lt; 100$ is prime.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-314-the-mouse-on-the-moon.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-314-the-mouse-on-the-moon.md
index 8d6523f846b..899395668c7 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-314-the-mouse-on-the-moon.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-314-the-mouse-on-the-moon.md
@@ -18,7 +18,7 @@ Although not allowed, but to get an idea if this is anything better: if you plac
 
 However, if you cut off from the square four triangles with sides 75 m, 75 m and $75\sqrt{2}$ m the total area becomes 238750 $\text{m}^2$ and the perimeter becomes $1400 + 300\sqrt{2}$ m. So this gives an $\frac{\text{enclosed-area}}{\text{wall-length}}$ ratio of 130.87, which is significantly better.
 
-<img class="img-responsive center-block" alt="picture showing difference in enclosed-area between circle and square with cut off four triangles" src="https://cdn.freecodecamp.org/curriculum/project-euler/the-mouse-on-the-moon.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="picture showing difference in enclosed-area between circle and square with cut off four triangles" src="https://cdn.freecodecamp.org/curriculum/project-euler/the-mouse-on-the-moon.gif" style="background-color: white; padding: 10px;" />
 
 Find the maximum $\frac{\text{enclosed-area}}{\text{wall-length}}$ ratio. Give your answer rounded to 8 places behind the decimal point in the form abc.defghijk.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-315-digital-root-clocks.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-315-digital-root-clocks.md
index d69506d1b93..59389d4a7ff 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-315-digital-root-clocks.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-315-digital-root-clocks.md
@@ -8,7 +8,7 @@ dashedName: problem-315-digital-root-clocks
 
 # --description--
 
-<img class="img-responsive center-block" alt="animation of Sam's and Max's clocks calculating digital roots starting from 137" src="https://cdn.freecodecamp.org/curriculum/project-euler/digital-root-clocks.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="animation of Sam's and Max's clocks calculating digital roots starting from 137" src="https://cdn.freecodecamp.org/curriculum/project-euler/digital-root-clocks.gif" style="background-color: white; padding: 10px;" />
 
 Sam and Max are asked to transform two digital clocks into two "digital root" clocks.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-318-2011-nines.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-318-2011-nines.md
index 0b00fa2d7fc..f4b4f8315b5 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-318-2011-nines.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-318-2011-nines.md
@@ -12,16 +12,11 @@ Consider the real number $\sqrt{2} + \sqrt{3}$.
 
 When we calculate the even powers of $\sqrt{2} + \sqrt{3}$ we get:
 
-$$\begin{align}
-  & {(\sqrt{2} + \sqrt{3})}^2 = 9.898979485566356\ldots \\\\
-  & {(\sqrt{2} + \sqrt{3})}^4 = 97.98979485566356\ldots \\\\
-  & {(\sqrt{2} + \sqrt{3})}^6 = 969.998969071069263\ldots \\\\
-  & {(\sqrt{2} + \sqrt{3})}^8 = 9601.99989585502907\ldots \\\\
-  & {(\sqrt{2} + \sqrt{3})}^{10} = 95049.999989479221\ldots \\\\
-  & {(\sqrt{2} + \sqrt{3})}^{12} = 940897.9999989371855\ldots \\\\
-  & {(\sqrt{2} + \sqrt{3})}^{14} = 9313929.99999989263\ldots \\\\
-  & {(\sqrt{2} + \sqrt{3})}^{16} = 92198401.99999998915\ldots \\\\
-\end{align}$$
+$$\begin{align}   & {(\sqrt{2} + \sqrt{3})}^2 = 9.898979485566356\ldots \\\\
+  & {(\sqrt{2} + \sqrt{3})}^4 = 97.98979485566356\ldots \\\\   & {(\sqrt{2} + \sqrt{3})}^6 = 969.998969071069263\ldots \\\\
+  & {(\sqrt{2} + \sqrt{3})}^8 = 9601.99989585502907\ldots \\\\   & {(\sqrt{2} + \sqrt{3})}^{10} = 95049.999989479221\ldots \\\\
+  & {(\sqrt{2} + \sqrt{3})}^{12} = 940897.9999989371855\ldots \\\\   & {(\sqrt{2} + \sqrt{3})}^{14} = 9313929.99999989263\ldots \\\\
+  & {(\sqrt{2} + \sqrt{3})}^{16} = 92198401.99999998915\ldots \\\\ \end{align}$$
 
 It looks like that the number of consecutive nines at the beginning of the fractional part of these powers is non-decreasing. In fact it can be proven that the fractional part of ${(\sqrt{2} + \sqrt{3})}^{2n}$ approaches 1 for large $n$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-321-swapping-counters.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-321-swapping-counters.md
index 584763b700b..177610fd3c7 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-321-swapping-counters.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-321-swapping-counters.md
@@ -10,11 +10,11 @@ dashedName: problem-321-swapping-counters
 
 A horizontal row comprising of $2n + 1$ squares has $n$ red counters placed at one end and $n$ blue counters at the other end, being separated by a single empty square in the center. For example, when $n = 3$.
 
-<img class="img-responsive center-block" alt="three squares with red and blue counters placed on opposite ends of the row, separated by one empty square" src="https://cdn.freecodecamp.org/curriculum/project-euler/swapping-counters-1.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="three squares with red and blue counters placed on opposite ends of the row, separated by one empty square" src="https://cdn.freecodecamp.org/curriculum/project-euler/swapping-counters-1.gif" style="background-color: white; padding: 10px;" />
 
 A counter can move from one square to the next (slide) or can jump over another counter (hop) as long as the square next to that counter is unoccupied.
 
-<img class="img-responsive center-block" alt="allowed moves of the counter" src="https://cdn.freecodecamp.org/curriculum/project-euler/swapping-counters-2.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="allowed moves of the counter" src="https://cdn.freecodecamp.org/curriculum/project-euler/swapping-counters-2.gif" style="background-color: white; padding: 10px;" />
 
 Let $M(n)$ represent the minimum number of moves/actions to completely reverse the positions of the colored counters; that is, move all the red counters to the right and all the blue counters to the left.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-324-building-a-tower.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-324-building-a-tower.md
index 492e7aa030c..e79296a5f0f 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-324-building-a-tower.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-324-building-a-tower.md
@@ -12,13 +12,9 @@ Let $f(n)$ represent the number of ways one can fill a $3×3×n$ tower with bloc
 
 For example (with $q = 100\\,000\\,007$):
 
-$$\begin{align}
-  & f(2) = 229, \\\\
-  & f(4) = 117\\,805, \\\\
-  & f(10)\bmod q = 96\\,149\\,360, \\\\
-  & f({10}^3)\bmod q = 24\\,806\\,056, \\\\
-  & f({10}^6)\bmod q = 30\\,808\\,124.
-\end{align}$$
+$$\begin{align}   & f(2) = 229, \\\\
+  & f(4) = 117\\,805, \\\\   & f(10)\bmod q = 96\\,149\\,360, \\\\
+  & f({10}^3)\bmod q = 24\\,806\\,056, \\\\ & f({10}^6)\bmod q = 30\\,808\\,124. \end{align}$$
 
 Find $f({10}^{10000})\bmod 100\\,000\\,007$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-327-rooms-of-doom.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-327-rooms-of-doom.md
index 96f4d4ab618..d324e96908a 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-327-rooms-of-doom.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-327-rooms-of-doom.md
@@ -10,7 +10,7 @@ dashedName: problem-327-rooms-of-doom
 
 A series of three rooms are connected to each other by automatic doors.
 
-<img class="img-responsive center-block" alt="series of three rooms, connected to each other by automatic doors" src="https://cdn.freecodecamp.org/curriculum/project-euler/rooms-of-doom.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="series of three rooms, connected to each other by automatic doors" src="https://cdn.freecodecamp.org/curriculum/project-euler/rooms-of-doom.gif" style="background-color: white; padding: 10px;" />
 
 Each door is operated by a security card. Once you enter a room, the door automatically closes, and that security card cannot be used again. A machine will dispense an unlimited number of cards at the start, but each room (including the starting room) contains scanners. If they detect that you are holding more than three security cards or if they detect an unattended security card on the floor, then all the doors will become permanently locked. However, each room contains a box where you may safely store any number of security cards for use at a later stage.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-330-eulers-number.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-330-eulers-number.md
index 07d3dde36ba..33079aadd49 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-330-eulers-number.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-330-eulers-number.md
@@ -10,20 +10,13 @@ dashedName: problem-330-eulers-number
 
 An infinite sequence of real numbers $a(n)$ is defined for all integers $n$ as follows:
 
-$$ a(n) =
-\begin{cases}
-1                                                       & n < 0 \\\\
-\displaystyle \sum_{i = 1}^{\infty} \frac{a(n - 1)}{i!} & n \ge 0
-\end{cases}
-$$
+$$ a(n) = \begin{cases} 1                                                       & n < 0 \\\\
+\displaystyle \sum_{i = 1}^{\infty} \frac{a(n - 1)}{i!} & n \ge 0 \end{cases} $$
 
 For example,
 
-$$\begin{align}
-  & a(0) = \frac{1}{1!} + \frac{1}{2!} + \frac{1}{3!} + \ldots = e − 1 \\\\
-  & a(1) = \frac{e − 1}{1!} + \frac{1}{2!} + \frac{1}{3!} + \ldots = 2e − 3 \\\\
-  & a(2) = \frac{2e − 3}{1!} + \frac{e − 1}{2!} + \frac{1}{3!} + \ldots = \frac{7}{2} e − 6
-\end{align}$$
+$$\begin{align}   & a(0) = \frac{1}{1!} + \frac{1}{2!} + \frac{1}{3!} + \ldots = e − 1 \\\\
+  & a(1) = \frac{e − 1}{1!} + \frac{1}{2!} + \frac{1}{3!} + \ldots = 2e − 3 \\\\ & a(2) = \frac{2e − 3}{1!} + \frac{e − 1}{2!} + \frac{1}{3!} + \ldots = \frac{7}{2} e − 6 \end{align}$$
 
 with $e = 2.7182818\ldots$ being Euler's constant.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-331-cross-flips.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-331-cross-flips.md
index 03b30215538..84e5ffbdd51 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-331-cross-flips.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-331-cross-flips.md
@@ -12,7 +12,7 @@ N×N disks are placed on a square game board. Each disk has a black side and whi
 
 At each turn, you may choose a disk and flip all the disks in the same row and the same column as this disk: thus $2 × N - 1$ disks are flipped. The game ends when all disks show their white side. The following example shows a game on a 5×5 board.
 
-<img class="img-responsive center-block" alt="animation showing game on 5x5 board" src="https://cdn.freecodecamp.org/curriculum/project-euler/cross-flips.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="animation showing game on 5x5 board" src="https://cdn.freecodecamp.org/curriculum/project-euler/cross-flips.gif" style="background-color: white; padding: 10px;" />
 
 It can be proven that 3 is the minimal number of turns to finish this game.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-332-spherical-triangles.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-332-spherical-triangles.md
index 45dcdd790ec..54fe2d09a50 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-332-spherical-triangles.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-332-spherical-triangles.md
@@ -10,7 +10,7 @@ dashedName: problem-332-spherical-triangles
 
 A spherical triangle is a figure formed on the surface of a sphere by three great circular arcs intersecting pairwise in three vertices.
 
-<img class="img-responsive center-block" alt="spherical triangle formed on the surface of a sphere" src="https://cdn.freecodecamp.org/curriculum/project-euler/spherical-triangles.jpg" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="spherical triangle formed on the surface of a sphere" src="https://cdn.freecodecamp.org/curriculum/project-euler/spherical-triangles.jpg" style="background-color: white; padding: 10px;" />
 
 Let $C(r)$ be the sphere with the centre (0,0,0) and radius $r$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-333-special-partitions.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-333-special-partitions.md
index 04f147bf860..27cad095741 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-333-special-partitions.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-333-special-partitions.md
@@ -14,10 +14,8 @@ Let's consider only those such partitions where none of the terms can divide any
 
 Many integers have more than one valid partition, the first being 11 having the following two partitions.
 
-$$\begin{align}
-  & 11 = 2 + 9 = (2^1 \times 3^0 + 2^0 \times 3^2) \\\\
-  & 11 = 8 + 3 = (2^3 \times 3^0 + 2^0 \times 3^1)
-\end{align}$$
+$$\begin{align}   & 11 = 2 + 9 = (2^1 \times 3^0 + 2^0 \times 3^2) \\\\
+  & 11 = 8 + 3 = (2^3 \times 3^0 + 2^0 \times 3^1) \end{align}$$
 
 Let's define $P(n)$ as the number of valid partitions of $n$. For example, $P(11) = 2$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-334-spilling-the-beans.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-334-spilling-the-beans.md
index 10194d3fddf..b301ac71594 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-334-spilling-the-beans.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-334-spilling-the-beans.md
@@ -12,19 +12,14 @@ In Plato's heaven, there exist an infinite number of bowls in a straight line. E
 
 For example, consider two adjacent bowls containing 2 and 3 beans respectively, all other bowls being empty. The following eight moves will finish the game:
 
-<img class="img-responsive center-block" alt="animation of game when two adjacent bowls contain 2 and 3 beans respectively" src="https://cdn.freecodecamp.org/curriculum/project-euler/spilling-the-beans.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="animation of game when two adjacent bowls contain 2 and 3 beans respectively" src="https://cdn.freecodecamp.org/curriculum/project-euler/spilling-the-beans.gif" style="background-color: white; padding: 10px;" />
 
 You are given the following sequences:
 
-$$\begin{align}
-  & t_0 = 123456, \\\\
-  & t_i = \begin{cases}
-         \frac{t_{i - 1}}{2},               & \text{if $t_{i - 1}$ is even} \\\\
-         \left\lfloor\frac{t_{i - 1}}{2}\right\rfloor \oplus 926252, & \text{if $t_{i - 1}$ is odd}
-         \end{cases} \\\\
-         & \qquad \text{where $⌊x⌋$ is the floor function and $\oplus$ is the bitwise XOR operator.} \\\\
-  & b_i = (t_i\bmod 2^{11}) + 1.
-\end{align}$$
+$$\begin{align}   & t_0 = 123456, \\\\
+  & t_i = \begin{cases}          \frac{t_{i - 1}}{2},               & \text{if $t_{i - 1}$ is even} \\\\
+         \left\lfloor\frac{t_{i - 1}}{2}\right\rfloor \oplus 926252, & \text{if $t_{i - 1}$ is odd}          \end{cases} \\\\
+         & \qquad \text{where $⌊x⌋$ is the floor function and $\oplus$ is the bitwise XOR operator.} \\\\ & b_i = (t_i\bmod 2^{11}) + 1. \end{align}$$
 
 The first two terms of the last sequence are $b_1 = 289$ and $b_2 = 145$. If we start with $b_1$ and $b_2$ beans in two adjacent bowls, 3419100 moves would be required to finish the game.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-335-gathering-the-beans.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-335-gathering-the-beans.md
index b871f96d6c9..c1b35177c9b 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-335-gathering-the-beans.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-335-gathering-the-beans.md
@@ -10,7 +10,7 @@ dashedName: problem-335-gathering-the-beans
 
 Whenever Peter feels bored, he places some bowls, containing one bean each, in a circle. After this, he takes all the beans out of a certain bowl and drops them one by one in the bowls going clockwise. He repeats this, starting from the bowl he dropped the last bean in, until the initial situation appears again. For example with 5 bowls he acts as follows:
 
-<img class="img-responsive center-block" alt="animation of moving beans in 5 bowls" src="https://cdn.freecodecamp.org/curriculum/project-euler/gathering-the-beans.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="animation of moving beans in 5 bowls" src="https://cdn.freecodecamp.org/curriculum/project-euler/gathering-the-beans.gif" style="background-color: white; padding: 10px;" />
 
 So with 5 bowls it takes Peter 15 moves to return to the initial situation.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-336-maximix-arrangements.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-336-maximix-arrangements.md
index dc3c704a151..c5df56c3d7b 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-336-maximix-arrangements.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-336-maximix-arrangements.md
@@ -18,7 +18,7 @@ However, Simple Simon, the train driver, is not known for his efficiency, so he
 
 Using four carriages, the worst possible arrangements for Simon, which we shall call maximix arrangements, are $DACB$ and $DBAC$; each requiring him five rotations (although, using the most efficient approach, they could be solved using just three rotations). The process he uses for $DACB$ is shown below.
 
-<img class="img-responsive center-block" alt="five rotations for maximix arrangement DACB" src="https://cdn.freecodecamp.org/curriculum/project-euler/maximix-arrangements.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="five rotations for maximix arrangement DACB" src="https://cdn.freecodecamp.org/curriculum/project-euler/maximix-arrangements.gif" style="background-color: white; padding: 10px;" />
 
 It can be verified that there are 24 maximix arrangements for six carriages, of which the tenth lexicographic maximix arrangement is $DFAECB$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-338-cutting-rectangular-grid-paper.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-338-cutting-rectangular-grid-paper.md
index c0c2bbc8beb..9a2143b65fd 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-338-cutting-rectangular-grid-paper.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-338-cutting-rectangular-grid-paper.md
@@ -14,7 +14,7 @@ When we cut the sheet along the grid lines into two pieces and rearrange those p
 
 For example, from a sheet with dimensions 9 × 4, we can make rectangles with dimensions 18 × 2, 12 × 3 and 6 × 6 by cutting and rearranging as below:
 
-<img class="img-responsive center-block" alt="sheet with 9 x 4 dimensions cut in three different ways to make rectangles with 18 x 2, 12 x 3 and 6 x 6 dimensions" src="https://cdn.freecodecamp.org/curriculum/project-euler/cutting-rectangular-grid-paper.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="sheet with 9 x 4 dimensions cut in three different ways to make rectangles with 18 x 2, 12 x 3 and 6 x 6 dimensions" src="https://cdn.freecodecamp.org/curriculum/project-euler/cutting-rectangular-grid-paper.gif" style="background-color: white; padding: 10px;" />
 
 Similarly, from a sheet with dimensions 9 × 8, we can make rectangles with dimensions 18 × 4 and 12 × 6.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-340-crazy-function.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-340-crazy-function.md
index eeee6c9c868..72da02c1095 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-340-crazy-function.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-340-crazy-function.md
@@ -10,10 +10,8 @@ dashedName: problem-340-crazy-function
 
 For fixed integers $a$, $b$, $c$, define the crazy function $F(n)$ as follows:
 
-$$\begin{align}
-  & F(n) = n - c \\;\text{ for all } n > b \\\\
-  & F(n) = F(a + F(a + F(a + F(a + n)))) \\;\text{ for all } n ≤ b.
-\end{align}$$
+$$\begin{align}   & F(n) = n - c \\;\text{ for all } n > b \\\\
+  & F(n) = F(a + F(a + F(a + F(a + n)))) \\;\text{ for all } n ≤ b. \end{align}$$
 
 Also, define $S(a, b, c) = \displaystyle\sum_{n = 0}^b F(n)$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-341-golombs-self-describing-sequence.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-341-golombs-self-describing-sequence.md
index 989907ccbb4..f3ebbd9cdd0 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-341-golombs-self-describing-sequence.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-341-golombs-self-describing-sequence.md
@@ -10,10 +10,8 @@ dashedName: problem-341-golombs-self-describing-sequence
 
 The Golomb's self-describing sequence ($G(n)$) is the only nondecreasing sequence of natural numbers such that $n$ appears exactly $G(n)$ times in the sequence. The values of $G(n)$ for the first few $n$ are
 
-$$\begin{array}{c}
-  n    & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 & 13 & 14 & 15 & \ldots \\\\
-  G(n) & 1 & 2 & 2 & 3 & 3 & 4 & 4 & 4 & 5 & 5  &  5 &  6 &  6 &  6 &  6 & \ldots
-\end{array}$$
+$$\begin{array}{c}   n    & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 & 13 & 14 & 15 & \ldots \\\\
+  G(n) & 1 & 2 & 2 & 3 & 3 & 4 & 4 & 4 & 5 & 5  &  5 &  6 &  6 &  6 &  6 & \ldots \end{array}$$
 
 You are given that $G({10}^3) = 86$, $G({10}^6) = 6137$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-344-silver-dollar-game.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-344-silver-dollar-game.md
index 7e8cf816e6b..0f9fcc5f2e6 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-344-silver-dollar-game.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-344-silver-dollar-game.md
@@ -18,7 +18,7 @@ Alternatively, the player can choose to make the special move of pocketing the l
 
 The winner is the player who pockets the silver dollar.
 
-<img class="img-responsive center-block" alt="silver dollar game" src="https://cdn.freecodecamp.org/curriculum/project-euler/silver-dollar-game.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="silver dollar game" src="https://cdn.freecodecamp.org/curriculum/project-euler/silver-dollar-game.gif" style="background-color: white; padding: 10px;" />
 
 A winning configuration is an arrangement of coins on the strip where the first player can force a win no matter what the second player does.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-345-matrix-sum.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-345-matrix-sum.md
index cf884f8734e..19aa26fd74f 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-345-matrix-sum.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-345-matrix-sum.md
@@ -12,33 +12,20 @@ We define the Matrix Sum of a matrix as the maximum sum of matrix elements with
 
 For example, the Matrix Sum of the matrix below equals $3315 ( = 863 + 383 + 343 + 959 + 767)$:
 
-$$\begin{array}{rrrrr}
-    7                &  53                & 183                & 439                & \color{lime}{863} \\\\
-  497                & \color{lime}{383} & 563                &  79                & 973 \\\\
-  287                &  63                & \color{lime}{343} & 169                & 583 \\\\
-  627                & 343                & 773                & \color{lime}{959} & 943 \\\\
-  \color{lime}{767} & 473                & 103                & 699                & 303
-\end{array}$$
+$$\begin{array}{rrrrr}     7                &  53                & 183                & 439                & \color{lime}{863} \\\\
+  497                & \color{lime}{383} & 563                &  79                & 973 \\\\   287                &  63                & \color{lime}{343} & 169                & 583 \\\\
+  627                & 343                & 773                & \color{lime}{959} & 943 \\\\ \color{lime}{767} & 473                & 103                & 699                & 303 \end{array}$$
 
 Find the Matrix Sum of:
 
-$$\\begin{array}{r}
-    7 &  53 & 183 & 439 & 863 & 497 & 383 & 563 &  79 & 973 & 287 &  63 & 343 & 169 & 583 \\\\
-  627 & 343 & 773 & 959 & 943 & 767 & 473 & 103 & 699 & 303 & 957 & 703 & 583 & 639 & 913 \\\\
-  447 & 283 & 463 &  29 &  23 & 487 & 463 & 993 & 119 & 883 & 327 & 493 & 423 & 159 & 743 \\\\
-  217 & 623 &   3 & 399 & 853 & 407 & 103 & 983 &  89 & 463 & 290 & 516 & 212 & 462 & 350 \\\\
-  960 & 376 & 682 & 962 & 300 & 780 & 486 & 502 & 912 & 800 & 250 & 346 & 172 & 812 & 350 \\\\
-  870 & 456 & 192 & 162 & 593 & 473 & 915 &  45 & 989 & 873 & 823 & 965 & 425 & 329 & 803 \\\\
-  973 & 965 & 905 & 919 & 133 & 673 & 665 & 235 & 509 & 613 & 673 & 815 & 165 & 992 & 326 \\\\
-  322 & 148 & 972 & 962 & 286 & 255 & 941 & 541 & 265 & 323 & 925 & 281 & 601 &  95 & 973 \\\\
-  445 & 721 &  11 & 525 & 473 &  65 & 511 & 164 & 138 & 672 &  18 & 428 & 154 & 448 & 848 \\\\
-  414 & 456 & 310 & 312 & 798 & 104 & 566 & 520 & 302 & 248 & 694 & 976 & 430 & 392 & 198 \\\\
-  184 & 829 & 373 & 181 & 631 & 101 & 969 & 613 & 840 & 740 & 778 & 458 & 284 & 760 & 390 \\\\
-  821 & 461 & 843 & 513 &  17 & 901 & 711 & 993 & 293 & 157 & 274 &  94 & 192 & 156 & 574 \\\\
-   34 & 124 &   4 & 878 & 450 & 476 & 712 & 914 & 838 & 669 & 875 & 299 & 823 & 329 & 699 \\\\
-  815 & 559 & 813 & 459 & 522 & 788 & 168 & 586 & 966 & 232 & 308 & 833 & 251 & 631 & 107 \\\\
-  813 & 883 & 451 & 509 & 615 &  77 & 281 & 613 & 459 & 205 & 380 & 274 & 302 &  35 & 805
-\end{array}$$
+$$\\begin{array}{r}     7 &  53 & 183 & 439 & 863 & 497 & 383 & 563 &  79 & 973 & 287 &  63 & 343 & 169 & 583 \\\\
+  627 & 343 & 773 & 959 & 943 & 767 & 473 & 103 & 699 & 303 & 957 & 703 & 583 & 639 & 913 \\\\   447 & 283 & 463 &  29 &  23 & 487 & 463 & 993 & 119 & 883 & 327 & 493 & 423 & 159 & 743 \\\\
+  217 & 623 &   3 & 399 & 853 & 407 & 103 & 983 &  89 & 463 & 290 & 516 & 212 & 462 & 350 \\\\   960 & 376 & 682 & 962 & 300 & 780 & 486 & 502 & 912 & 800 & 250 & 346 & 172 & 812 & 350 \\\\
+  870 & 456 & 192 & 162 & 593 & 473 & 915 &  45 & 989 & 873 & 823 & 965 & 425 & 329 & 803 \\\\   973 & 965 & 905 & 919 & 133 & 673 & 665 & 235 & 509 & 613 & 673 & 815 & 165 & 992 & 326 \\\\
+  322 & 148 & 972 & 962 & 286 & 255 & 941 & 541 & 265 & 323 & 925 & 281 & 601 &  95 & 973 \\\\   445 & 721 &  11 & 525 & 473 &  65 & 511 & 164 & 138 & 672 &  18 & 428 & 154 & 448 & 848 \\\\
+  414 & 456 & 310 & 312 & 798 & 104 & 566 & 520 & 302 & 248 & 694 & 976 & 430 & 392 & 198 \\\\   184 & 829 & 373 & 181 & 631 & 101 & 969 & 613 & 840 & 740 & 778 & 458 & 284 & 760 & 390 \\\\
+  821 & 461 & 843 & 513 &  17 & 901 & 711 & 993 & 293 & 157 & 274 &  94 & 192 & 156 & 574 \\\\    34 & 124 &   4 & 878 & 450 & 476 & 712 & 914 & 838 & 669 & 875 & 299 & 823 & 329 & 699 \\\\
+  815 & 559 & 813 & 459 & 522 & 788 & 168 & 586 & 966 & 232 & 308 & 833 & 251 & 631 & 107 \\\\ 813 & 883 & 451 & 509 & 615 &  77 & 281 & 613 & 459 & 205 & 380 & 274 & 302 &  35 & 805 \end{array}$$
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-348-sum-of-a-square-and-a-cube.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-348-sum-of-a-square-and-a-cube.md
index c2447c6c908..8e69b16ca7a 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-348-sum-of-a-square-and-a-cube.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-348-sum-of-a-square-and-a-cube.md
@@ -14,12 +14,9 @@ Consider the palindromic numbers that can be expressed as the sum of a square an
 
 For example, 5229225 is a palindromic number and it can be expressed in exactly 4 different ways:
 
-$$\begin{align}
-  & {2285}^2 + {20}^3 \\\\
-  & {2223}^2 + {66}^3 \\\\
-  & {1810}^2 + {125}^3 \\\\
-  & {1197}^2 + {156}^3
-\end{align}$$
+$$\begin{align}   & {2285}^2 + {20}^3 \\\\
+  & {2223}^2 + {66}^3 \\\\   & {1810}^2 + {125}^3 \\\\
+  & {1197}^2 + {156}^3 \end{align}$$
 
 Find the sum of the five smallest such palindromic numbers.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-350-constraining-the-least-greatest-and-the-greatest-least.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-350-constraining-the-least-greatest-and-the-greatest-least.md
index c5f4e5a2288..5f15d5fd497 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-350-constraining-the-least-greatest-and-the-greatest-least.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-350-constraining-the-least-greatest-and-the-greatest-least.md
@@ -14,14 +14,11 @@ The greatest common divisor, or $gcd$, of a list is the largest natural number t
 
 The least common multiple, or $lcm$, of a list is the smallest natural number divisible by each entry of the list. Examples: $lcm(2, 6, 4) = 12$, $lcm(10, 6, 15, 6) = 30$ and $lcm(11) = 11$.
 
-Let $f(G, L, N)$ be the number of lists of size $N$ with $gcd ≥ G$ and $lcm ≤ L$. For example:
+Let $f(G, L, N)$ be the number of lists of size $N$ with $gcd ≥ G$ and $lcm ≤ L$. 예:
 
-$$\begin{align}
-  & f(10, 100, 1) = 91 \\\\
-  & f(10, 100, 2) = 327 \\\\
-  & f(10, 100, 3) = 1135 \\\\
-  & f(10, 100, 1000)\bmod {101}^4 = 3\\,286\\,053
-\end{align}$$
+$$\begin{align}   & f(10, 100, 1) = 91 \\\\
+  & f(10, 100, 2) = 327 \\\\   & f(10, 100, 3) = 1135 \\\\
+  & f(10, 100, 1000)\bmod {101}^4 = 3\\,286\\,053 \end{align}$$
 
 Find $f({10}^6, {10}^{12}, {10}^{18})\bmod {101}^4$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-351-hexagonal-orchards.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-351-hexagonal-orchards.md
index 75c78da3044..fa6811e9185 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-351-hexagonal-orchards.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-351-hexagonal-orchards.md
@@ -10,7 +10,7 @@ dashedName: problem-351-hexagonal-orchards
 
 A hexagonal orchard of order $n$ is a triangular lattice made up of points within a regular hexagon with side $n$. The following is an example of a hexagonal orchard of order 5:
 
-<img class="img-responsive center-block" alt="hexagonal orchard of order 5, with highlighted in green points, which are hidden from the center by a point closer to it" src="https://cdn.freecodecamp.org/curriculum/project-euler/hexagonal-orchards.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="hexagonal orchard of order 5, with highlighted in green points, which are hidden from the center by a point closer to it" src="https://cdn.freecodecamp.org/curriculum/project-euler/hexagonal-orchards.png" style="background-color: white; padding: 10px;" />
 
 Highlighted in green are the points which are hidden from the center by a point closer to it. It can be seen that for a hexagonal orchard of order 5, 30 points are hidden from the center.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-354-distances-in-a-bees-honeycomb.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-354-distances-in-a-bees-honeycomb.md
index f60039e5fdd..f7d023146ca 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-354-distances-in-a-bees-honeycomb.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-354-distances-in-a-bees-honeycomb.md
@@ -10,7 +10,7 @@ dashedName: problem-354-distances-in-a-bees-honeycomb
 
 Consider a honey bee's honeycomb where each cell is a perfect regular hexagon with side length 1.
 
-<img class="img-responsive center-block" alt="honeycomb with hexagon sides of length 1" src="https://cdn.freecodecamp.org/curriculum/project-euler/distances-in-a-bees-honeycomb.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="honeycomb with hexagon sides of length 1" src="https://cdn.freecodecamp.org/curriculum/project-euler/distances-in-a-bees-honeycomb.png" style="background-color: white; padding: 10px;" />
 
 One particular cell is occupied by the queen bee. For a positive real number $L$, let $B(L)$ count the cells with distance $L$ from the queen bee cell (all distances are measured from centre to centre); you may assume that the honeycomb is large enough to accommodate for any distance we wish to consider.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-358-cyclic-numbers.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-358-cyclic-numbers.md
index b298050648d..9a7f94d3bff 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-358-cyclic-numbers.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-358-cyclic-numbers.md
@@ -14,24 +14,16 @@ When it is multiplied by 1, 2, 3, 4, ... $n$, all the products have exactly the
 
 The smallest cyclic number is the 6-digit number 142857:
 
-$$\begin{align}
-  & 142857 × 1 = 142857 \\\\
-  & 142857 × 2 = 285714 \\\\
-  & 142857 × 3 = 428571 \\\\
-  & 142857 × 4 = 571428 \\\\
-  & 142857 × 5 = 714285 \\\\
-  & 142857 × 6 = 857142
-\end{align}$$
+$$\begin{align}   & 142857 × 1 = 142857 \\\\
+  & 142857 × 2 = 285714 \\\\   & 142857 × 3 = 428571 \\\\
+  & 142857 × 4 = 571428 \\\\   & 142857 × 5 = 714285 \\\\
+  & 142857 × 6 = 857142 \end{align}$$
 
 The next cyclic number is 0588235294117647 with 16 digits:
 
-$$\begin{align}
-  & 0588235294117647 × 1 = 0588235294117647 \\\\
-  & 0588235294117647 × 2 = 1176470588235294 \\\\
-  & 0588235294117647 × 3 = 1764705882352941 \\\\
-  & \ldots \\\\
-  & 0588235294117647 × 16 = 9411764705882352
-\end{align}$$
+$$\begin{align}   & 0588235294117647 × 1 = 0588235294117647 \\\\
+  & 0588235294117647 × 2 = 1176470588235294 \\\\   & 0588235294117647 × 3 = 1764705882352941 \\\\
+  & \ldots \\\\ & 0588235294117647 × 16 = 9411764705882352 \end{align}$$
 
 Note that for cyclic numbers, leading zeros are important.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-359-hilberts-new-hotel.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-359-hilberts-new-hotel.md
index 1fd01d0a3da..0cfd6a75f09 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-359-hilberts-new-hotel.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-359-hilberts-new-hotel.md
@@ -27,14 +27,10 @@ Eventually, every person in the line gets a room in the hotel.
 
 Define $P(f, r)$ to be $n$ if person $n$ occupies room $r$ in floor $f$, and 0 if no person occupies the room. Here are a few examples:
 
-$$\begin{align}
-  & P(1, 1) = 1 \\\\
-  & P(1, 2) = 3 \\\\
-  & P(2, 1) = 2 \\\\
-  & P(10, 20) = 440 \\\\
-  & P(25, 75) = 4863 \\\\
-  & P(99, 100) = 19454
-\end{align}$$
+$$\begin{align}   & P(1, 1) = 1 \\\\
+  & P(1, 2) = 3 \\\\   & P(2, 1) = 2 \\\\
+  & P(10, 20) = 440 \\\\   & P(25, 75) = 4863 \\\\
+  & P(99, 100) = 19454 \end{align}$$
 
 Find the sum of all $P(f, r)$ for all positive $f$ and $r$ such that $f × r = 71\\,328\\,803\\,586\\,048$ and give the last 8 digits as your answer.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-361-subsequence-of-thue-morse-sequence.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-361-subsequence-of-thue-morse-sequence.md
index 60d72bff3e9..efae1fb220c 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-361-subsequence-of-thue-morse-sequence.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-361-subsequence-of-thue-morse-sequence.md
@@ -20,10 +20,8 @@ We define $\\{A_n\\}$ as the sorted sequence of integers such that the binary ex
 
 The first several terms of $A_n$ are given as follows:
 
-$$\begin{array}{cr}
-  n   & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 &  8 &  9 & 10 & 11 & 12 & \ldots \\\\
-  A_n & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 9 & 10 & 11 & 12 & 13 & 18 & \ldots
-\end{array}$$
+$$\begin{array}{cr}   n   & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 &  8 &  9 & 10 & 11 & 12 & \ldots \\\\
+  A_n & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 9 & 10 & 11 & 12 & 13 & 18 & \ldots \end{array}$$
 
 We can also verify that $A_{100} = 3251$ and $A_{1000} = 80\\,852\\,364\\,498$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-363-bzier-curves.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-363-bzier-curves.md
index 78c4885b0ec..df13df6a0c5 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-363-bzier-curves.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-363-bzier-curves.md
@@ -12,7 +12,7 @@ A cubic Bézier curve is defined by four points: $P_0$, $P_1$, $P_2$ and $P_3$.
 
 The curve is constructed as follows:
 
-<img class="img-responsive center-block" alt="construction of Bézier curve" src="https://cdn.freecodecamp.org/curriculum/project-euler/bzier-curves.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="construction of Bézier curve" src="https://cdn.freecodecamp.org/curriculum/project-euler/bzier-curves.png" style="background-color: white; padding: 10px;" />
 
 On the segments $P_0P_1$, $P_1P_2$ and $P_2P_3$ the points $Q_0$,$Q_1$ and $Q_2$ are drawn such that $\frac{P_0Q_0}{P_0P_1} = \frac{P_1Q_1}{P_1P_2} = \frac{P_2Q_2}{P_2P_3} = t$, with $t$ in [0,1].
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-364-comfortable-distance.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-364-comfortable-distance.md
index 3ee50dbdde7..83f8f7ec5d4 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-364-comfortable-distance.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-364-comfortable-distance.md
@@ -16,7 +16,7 @@ There are $N$ seats in a row. $N$ people come after each other to fill the seats
 
 Let $T(N)$ be the number of possibilities that $N$ seats are occupied by $N$ people with the given rules. The following figure shows $T(4) = 8$.
 
-<img class="img-responsive center-block" alt="eight ways for N seats to be occupied by N people" src="https://cdn.freecodecamp.org/curriculum/project-euler/comfortable-distance.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="eight ways for N seats to be occupied by N people" src="https://cdn.freecodecamp.org/curriculum/project-euler/comfortable-distance.gif" style="background-color: white; padding: 10px;" />
 
 We can verify that $T(10) = 61\\,632$ and $T(1\\,000)\bmod 100\\,000\\,007 = 47\\,255\\,094$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-375-minimum-of-subsequences.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-375-minimum-of-subsequences.md
index 2b3b9c73114..082d94ef69c 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-375-minimum-of-subsequences.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-375-minimum-of-subsequences.md
@@ -10,10 +10,8 @@ dashedName: problem-375-minimum-of-subsequences
 
 Let $S_n$ be an integer sequence produced with the following pseudo-random number generator:
 
-$$\begin{align}
-        S_0 & = 290\\,797 \\\\
-  S_{n + 1} & = {S_n}^2\bmod 50\\,515\\,093
-\end{align}$$
+$$\begin{align}         S_0 & = 290\\,797 \\\\
+  S_{n + 1} & = {S_n}^2\bmod 50\\,515\\,093 \end{align}$$
 
 Let $A(i, j)$ be the minimum of the numbers $S_i, S_{i + 1}, \ldots, S_j$ for $i ≤ j$. Let $M(N) = \sum A(i, j)$ for $1 ≤ i ≤ j ≤ N$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-376-nontransitive-sets-of-dice.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-376-nontransitive-sets-of-dice.md
index a6c6ffb8fbc..344a1e84e90 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-376-nontransitive-sets-of-dice.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-376-nontransitive-sets-of-dice.md
@@ -10,10 +10,8 @@ dashedName: problem-376-nontransitive-sets-of-dice
 
 Consider the following set of dice with nonstandard pips:
 
-$$\begin{array}{}
-  \text{Die A: } & 1 & 4 & 4 & 4 & 4 & 4 \\\\
-  \text{Die B: } & 2 & 2 & 2 & 5 & 5 & 5 \\\\
-  \text{Die C: } & 3 & 3 & 3 & 3 & 3 & 6 \\\\
+$$\begin{array}{}   \text{Die A: } & 1 & 4 & 4 & 4 & 4 & 4 \\\\
+  \text{Die B: } & 2 & 2 & 2 & 5 & 5 & 5 \\\\   \text{Die C: } & 3 & 3 & 3 & 3 & 3 & 6 \\\\
 \end{array}$$
 
 A game is played by two players picking a die in turn and rolling it. The player who rolls the highest value wins.
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-380-amazing-mazes.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-380-amazing-mazes.md
index e3d7c665fac..15ae5170a74 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-380-amazing-mazes.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-380-amazing-mazes.md
@@ -10,7 +10,7 @@ dashedName: problem-380-amazing-mazes
 
 An $m×n$ maze is an $m×n$ rectangular grid with walls placed between grid cells such that there is exactly one path from the top-left square to any other square. The following are examples of a 9×12 maze and a 15×20 maze:
 
-<img class="img-responsive center-block" alt="9x12 maze and 15x20 maze" src="https://cdn.freecodecamp.org/curriculum/project-euler/amazing-mazes.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="9x12 maze and 15x20 maze" src="https://cdn.freecodecamp.org/curriculum/project-euler/amazing-mazes.gif" style="background-color: white; padding: 10px;" />
 
 Let $C(m, n)$ be the number of distinct $m×n$ mazes. Mazes which can be formed by rotation and reflection from another maze are considered distinct.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-382-generating-polygons.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-382-generating-polygons.md
index 605495d8fed..a79216d846f 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-382-generating-polygons.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-382-generating-polygons.md
@@ -16,7 +16,7 @@ A set $S$ of positive numbers is said to generate a polygon $P$ if:
 - the length of every side of $P$ is in $S$, and
 - $S$ contains no other value.
 
-For example:
+예시:
 
 The set {3, 4, 5} generates a polygon with sides 3, 4, and 5 (a triangle).
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-384-rudin-shapiro-sequence.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-384-rudin-shapiro-sequence.md
index d1dd089852a..9f11652c82f 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-384-rudin-shapiro-sequence.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-384-rudin-shapiro-sequence.md
@@ -18,12 +18,9 @@ Also consider the summatory sequence of $b(n)$: $s(n) = \displaystyle\sum_{i = 0
 
 The first couple of values of these sequences are:
 
-$$\begin{array}{lr}
-  n    & 0 & 1 & 2 &  3 & 4 & 5 &  6 & 7 \\\\
-  a(n) & 0 & 0 & 0 &  1 & 0 & 0 &  1 & 2 \\\\
-  b(n) & 1 & 1 & 1 & -1 & 1 & 1 & -1 & 1 \\\\
-  s(n) & 1 & 2 & 3 &  2 & 3 & 4 &  3 & 4
-\end{array}$$
+$$\begin{array}{lr}   n    & 0 & 1 & 2 &  3 & 4 & 5 &  6 & 7 \\\\
+  a(n) & 0 & 0 & 0 &  1 & 0 & 0 &  1 & 2 \\\\   b(n) & 1 & 1 & 1 & -1 & 1 & 1 & -1 & 1 \\\\
+  s(n) & 1 & 2 & 3 &  2 & 3 & 4 &  3 & 4 \end{array}$$
 
 The sequence $s(n)$ has the remarkable property that all elements are positive and every positive integer $k$ occurs exactly $k$ times.
 
@@ -33,10 +30,8 @@ E.g.: $g(3, 3) = 6$, $g(4, 2) = 7$ and $g(54321, 12345) = 1\\,220\\,847\\,710$.
 
 Let $F(n)$ be the fibonacci sequence defined by:
 
-$$\begin{align}
-  & F(0) = F(1) = 1 \text{ and} \\\\
-  & F(n) = F(n - 1) + F(n - 2) \text{ for } n > 1.
-\end{align}$$
+$$\begin{align}   & F(0) = F(1) = 1 \text{ and} \\\\
+  & F(n) = F(n - 1) + F(n - 2) \text{ for } n > 1. \end{align}$$
 
 Define $GF(t) = g(F(t), F(t - 1))$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-385-ellipses-inside-triangles.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-385-ellipses-inside-triangles.md
index 62312fa1428..13dcc0e7c5c 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-385-ellipses-inside-triangles.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-385-ellipses-inside-triangles.md
@@ -10,7 +10,7 @@ dashedName: problem-385-ellipses-inside-triangles
 
 For any triangle $T$ in the plane, it can be shown that there is a unique ellipse with largest area that is completely inside $T$.
 
-<img class="img-responsive center-block" alt="ellipse completely inside a triangle" src="https://cdn.freecodecamp.org/curriculum/project-euler/ellipses-inside-triangles.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="ellipse completely inside a triangle" src="https://cdn.freecodecamp.org/curriculum/project-euler/ellipses-inside-triangles.png" style="background-color: white; padding: 10px;" />
 
 For a given $n$, consider triangles $T$ such that:
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-392-enmeshed-unit-circle.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-392-enmeshed-unit-circle.md
index 5065da0c80a..7e40a574c29 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-392-enmeshed-unit-circle.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-392-enmeshed-unit-circle.md
@@ -24,7 +24,7 @@ For this problem we would like you to find the positions of the remaining $N$ in
 
 E.g. here is a picture of the solution for $N = 10$:
 
-<img class="img-responsive center-block" alt="solution for N = 10" src="https://cdn.freecodecamp.org/curriculum/project-euler/enmeshed-unit-circle.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="solution for N = 10" src="https://cdn.freecodecamp.org/curriculum/project-euler/enmeshed-unit-circle.png" style="background-color: white; padding: 10px;" />
 
 The area occupied by the red cells for $N = 10$ rounded to 10 digits behind the decimal point is 3.3469640797.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-394-eating-pie.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-394-eating-pie.md
index 5901e193913..a6b40bf39bc 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-394-eating-pie.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-394-eating-pie.md
@@ -19,7 +19,7 @@ While there is at least a given fraction $F$ of pie left, he performs the follow
 
 When less than a fraction $F$ of pie remains, he does not repeat this procedure. Instead, he eats all of the remaining pie.
 
-<img class="img-responsive center-block" alt="animation of pie slicing procedure" src="https://cdn.freecodecamp.org/curriculum/project-euler/eating-pie.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="animation of pie slicing procedure" src="https://cdn.freecodecamp.org/curriculum/project-euler/eating-pie.gif" style="background-color: white; padding: 10px;" />
 
 For $x ≥ 1$, let $E(x)$ be the expected number of times Jeff repeats the procedure above with $F = \frac{1}{x}$. It can be verified that $E(1) = 1$, $E(2) ≈ 1.2676536759$, and $E(7.5) ≈ 2.1215732071$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-395-pythagorean-tree.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-395-pythagorean-tree.md
index 28477a1edd0..cff705c06fb 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-395-pythagorean-tree.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-395-pythagorean-tree.md
@@ -18,7 +18,7 @@ Start with a unit square. Then, calling one of the sides its base (in the animat
 
 The resulting figure, after an infinite number of iterations, is the Pythagorean tree.
 
-<img class="img-responsive center-block" alt="animation showing 8 iterations of the procedure" src="https://cdn.freecodecamp.org/curriculum/project-euler/pythagorean-tree.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="animation showing 8 iterations of the procedure" src="https://cdn.freecodecamp.org/curriculum/project-euler/pythagorean-tree.gif" style="background-color: white; padding: 10px;" />
 
 It can be shown that there exists at least one rectangle, whose sides are parallel to the largest square of the Pythagorean tree, which encloses the Pythagorean tree completely.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-400-fibonacci-tree-game.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-400-fibonacci-tree-game.md
index ed865dc0e93..2b2e220949c 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-400-fibonacci-tree-game.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-301-to-400/problem-400-fibonacci-tree-game.md
@@ -18,7 +18,7 @@ On such a tree two players play a take-away game. On each turn a player selects
 
 Here are the winning moves of the first player on the first turn for $T(k)$ from $k = 1$ to $k = 6$.
 
-<img class="img-responsive center-block" alt="winning moves of first player, on the first turn for k = 1 to k = 6" src="https://cdn.freecodecamp.org/curriculum/project-euler/fibonacci-tree-game.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="winning moves of first player, on the first turn for k = 1 to k = 6" src="https://cdn.freecodecamp.org/curriculum/project-euler/fibonacci-tree-game.png" style="background-color: white; padding: 10px;" />
 
 Let $f(k)$ be the number of winning moves of the first player (i.e. the moves for which the second player has no winning strategy) on the first turn of the game when this game is played on $T(k)$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-404-crisscross-ellipses.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-404-crisscross-ellipses.md
index edd17b0958a..92690bd7a6d 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-404-crisscross-ellipses.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-404-crisscross-ellipses.md
@@ -12,7 +12,7 @@ $E_a$ is an ellipse with an equation of the form $x^2 + 4y^2 = 4a^2$.
 
 $E_a'$ is the rotated image of $E_a$ by $θ$ degrees counterclockwise around the origin $O(0, 0)$ for $0° &lt; θ &lt; 90°$.
 
-<img class="img-responsive center-block" alt="ellipse E_a and ellipse rotated by θ degrees E_a'" src="https://cdn.freecodecamp.org/curriculum/project-euler/crisscross-ellipses.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="ellipse E_a and ellipse rotated by θ degrees E_a'" src="https://cdn.freecodecamp.org/curriculum/project-euler/crisscross-ellipses.gif" style="background-color: white; padding: 10px;" />
 
 $b$ is the distance to the origin of the two intersection points closest to the origin and $c$ is the distance of the two other intersection points.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-405-a-rectangular-tiling.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-405-a-rectangular-tiling.md
index cb151b7764c..43ceb097a66 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-405-a-rectangular-tiling.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-405-a-rectangular-tiling.md
@@ -14,11 +14,11 @@ Let $T(0)$ be the tiling consisting of a single rectangle.
 
 For $n > 0$, let $T(n)$ be obtained from $T( n- 1)$ by replacing all tiles in the following manner:
 
-<img class="img-responsive center-block" alt="obtaining T(n) from T(n - 1)" src="https://cdn.freecodecamp.org/curriculum/project-euler/a-rectangular-tiling-1.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="obtaining T(n) from T(n - 1)" src="https://cdn.freecodecamp.org/curriculum/project-euler/a-rectangular-tiling-1.png" style="background-color: white; padding: 10px;" />
 
 The following animation demonstrates the tilings $T(n)$ for $n$ from 0 to 5:
 
-<img class="img-responsive center-block" alt="animation with tilings T(n) for n from 0 to 5" src="https://cdn.freecodecamp.org/curriculum/project-euler/a-rectangular-tiling-2.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="animation with tilings T(n) for n from 0 to 5" src="https://cdn.freecodecamp.org/curriculum/project-euler/a-rectangular-tiling-2.gif" style="background-color: white; padding: 10px;" />
 
 Let $f(n)$ be the number of points where four tiles meet in $T(n)$. For example, $f(1) = 0$, $f(4) = 82$ and $f({10}^9)\bmod {17}^7 = 126\\,897\\,180$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-406-guessing-game.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-406-guessing-game.md
index 6e1478d371a..6907ad6dae2 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-406-guessing-game.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-406-guessing-game.md
@@ -32,12 +32,9 @@ Let $C(n, a, b)$ be the worst-case cost achieved by an optimal strategy for the
 
 Here are a few examples:
 
-$$\begin{align}
-  & C(5, 2, 3) = 5 \\\\
-  & C(500, \sqrt{2}, \sqrt{3}) = 13.220\\,731\\,97\ldots \\\\
-  & C(20\\,000, 5, 7) = 82 \\\\
-  & C(2\\,000\\,000, √5, √7) = 49.637\\,559\\,55\ldots \\\\
-\end{align}$$
+$$\begin{align}   & C(5, 2, 3) = 5 \\\\
+  & C(500, \sqrt{2}, \sqrt{3}) = 13.220\\,731\\,97\ldots \\\\   & C(20\\,000, 5, 7) = 82 \\\\
+  & C(2\\,000\\,000, √5, √7) = 49.637\\,559\\,55\ldots \\\\ \end{align}$$
 
 Let $F_k$ be the Fibonacci numbers: $F_k = F_{k - 1} + F_{k - 2}$ with base cases $F_1 = F_2 = 1$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-411-uphill-paths.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-411-uphill-paths.md
index e7ea4cb4212..09ace26cdea 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-411-uphill-paths.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-411-uphill-paths.md
@@ -16,7 +16,7 @@ Let $S(n)$ be the maximum number of stations such a path can pass through.
 
 For example, if $n = 22$, there are 11 distinct stations, and a valid path can pass through at most 5 stations. Therefore, $S(22) = 5$. The case is illustrated below, with an example of an optimal path:
 
-<img class="img-responsive center-block" alt="valid path passing through 5 stations, for n = 22, with 11 distinct stations" src="https://cdn.freecodecamp.org/curriculum/project-euler/uphill-paths.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="valid path passing through 5 stations, for n = 22, with 11 distinct stations" src="https://cdn.freecodecamp.org/curriculum/project-euler/uphill-paths.png" style="background-color: white; padding: 10px;" />
 
 It can also be verified that $S(123) = 14$ and $S(10\\,000) = 48$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-412-gnomon-numbering.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-412-gnomon-numbering.md
index f50157e924c..ac00f985c10 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-412-gnomon-numbering.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-412-gnomon-numbering.md
@@ -12,13 +12,13 @@ For integers $m$, $n$ ($0 ≤ n &lt; m$), let $L(m, n)$ be an $m×m$ grid with t
 
 For example, $L(5, 3)$ looks like this:
 
-<img class="img-responsive center-block" alt="5x5 grid, with removed 3x3 grid from the top-right" src="https://cdn.freecodecamp.org/curriculum/project-euler/gnomon-numbering-1.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="5x5 grid, with removed 3x3 grid from the top-right" src="https://cdn.freecodecamp.org/curriculum/project-euler/gnomon-numbering-1.png" style="background-color: white; padding: 10px;" />
 
 We want to number each cell of $L(m, n)$ with consecutive integers 1, 2, 3, ... such that the number in every cell is smaller than the number below it and to the left of it.
 
 For example, here are two valid numberings of $L(5, 3)$:
 
-<img class="img-responsive center-block" alt="two valid numberings of L(5, 3)" src="https://cdn.freecodecamp.org/curriculum/project-euler/gnomon-numbering-2.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="two valid numberings of L(5, 3)" src="https://cdn.freecodecamp.org/curriculum/project-euler/gnomon-numbering-2.png" style="background-color: white; padding: 10px;" />
 
 Let $LC(m, n)$ be the number of valid numberings of $L(m, n)$. It can be verified that $LC(3, 0) = 42$, $LC(5, 3) = 250\\,250$, $LC(6, 3) = 406\\,029\\,023\\,400$ and $LC(10, 5)\bmod 76\\,543\\,217 = 61\\,251\\,715$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-414-kaprekar-constant.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-414-kaprekar-constant.md
index 0d3500b139d..e50ab2c9a7e 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-414-kaprekar-constant.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-414-kaprekar-constant.md
@@ -16,18 +16,14 @@ This also works with numbers that have less than 4 digits if we pad the number w
 
 E.g. let's start with the number 0837:
 
-$$\begin{align}
-  & 8730 - 0378 = 8352 \\\\
-  & 8532 - 2358 = 6174
-\end{align}$$
+$$\begin{align}   & 8730 - 0378 = 8352 \\\\
+  & 8532 - 2358 = 6174 \end{align}$$
 
 6174 is called the Kaprekar constant. The process of sorting and subtracting and repeating this until either 0 or the Kaprekar constant is reached is called the Kaprekar routine.
 
 We can consider the Kaprekar routine for other bases and number of digits. Unfortunately, it is not guaranteed a Kaprekar constant exists in all cases; either the routine can end up in a cycle for some input numbers or the constant the routine arrives at can be different for different input numbers. However, it can be shown that for 5 digits and a base $b = 6t + 3 ≠ 9$, a Kaprekar constant exists.
 
-E.g.
-base 15: ${(10, 4, 14, 9, 5)}\_{15}$
-base 21: $(14, 6, 20, 13, 7)\_{21}$
+E.g. base 15: ${(10, 4, 14, 9, 5)}\_{15}$ base 21: $(14, 6, 20, 13, 7)\_{21}$
 
 Define $C_b$ to be the Kaprekar constant in base $b$ for 5 digits. Define the function $sb(i)$ to be:
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-417-reciprocal-cycles-ii.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-417-reciprocal-cycles-ii.md
index c4292cef8bc..aa0880c13f4 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-417-reciprocal-cycles-ii.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-417-reciprocal-cycles-ii.md
@@ -10,16 +10,11 @@ dashedName: problem-417-reciprocal-cycles-ii
 
 A unit fraction contains 1 in the numerator. The decimal representation of the unit fractions with denominators 2 to 10 are given:
 
-$$\begin{align}
-  & \frac{1}{2}  = 0.5 \\\\
-  & \frac{1}{3}  = 0.(3) \\\\
-  & \frac{1}{4}  = 0.25 \\\\
-  & \frac{1}{5}  = 0.2 \\\\
-  & \frac{1}{6}  = 0.1(6) \\\\
-  & \frac{1}{7}  = 0.(142857) \\\\
-  & \frac{1}{8}  = 0.125 \\\\
-  & \frac{1}{9}  = 0.(1) \\\\
-  & \frac{1}{10} = 0.1 \\\\
+$$\begin{align}   & \frac{1}{2}  = 0.5 \\\\
+  & \frac{1}{3}  = 0.(3) \\\\   & \frac{1}{4}  = 0.25 \\\\
+  & \frac{1}{5}  = 0.2 \\\\   & \frac{1}{6}  = 0.1(6) \\\\
+  & \frac{1}{7}  = 0.(142857) \\\\   & \frac{1}{8}  = 0.125 \\\\
+  & \frac{1}{9}  = 0.(1) \\\\   & \frac{1}{10} = 0.1 \\\\
 \end{align}$$
 
 Where $0.1(6)$ means $0.166666\ldots$, and has a 1-digit recurring cycle. It can be seen that $\frac{1}{7}$ has a 6-digit recurring cycle.
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-420-2x2-positive-integer-matrix.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-420-2x2-positive-integer-matrix.md
index e9d58f43440..50a7c676cb8 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-420-2x2-positive-integer-matrix.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-420-2x2-positive-integer-matrix.md
@@ -12,18 +12,14 @@ A positive integer matrix is a matrix whose elements are all positive integers.
 
 Some positive integer matrices can be expressed as a square of a positive integer matrix in two different ways. Here is an example:
 
-$$\begin{pmatrix}
-  40 & 12 \\\\
-  48 & 40
-\end{pmatrix} =
+$$\begin{pmatrix}   40 & 12 \\\\
+  48 & 40 \end{pmatrix} =
 {\begin{pmatrix}
   2 & 3 \\\\
- 12 & 2
-\end{pmatrix}}^2 =
+ 12 & 2 \end{pmatrix}}^2 =
 {\begin{pmatrix}
   6 & 1 \\\\
-  4 & 6
-\end{pmatrix}}^2$$
+  4 & 6 \end{pmatrix}}^2$$
 
 We define $F(N)$ as the number of the 2x2 positive integer matrices which have a trace less than N and which can be expressed as a square of a positive integer matrix in two different ways.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-422-sequence-of-points-on-a-hyperbola.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-422-sequence-of-points-on-a-hyperbola.md
index bb46ddcc35c..7ea875b71ab 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-422-sequence-of-points-on-a-hyperbola.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-422-sequence-of-points-on-a-hyperbola.md
@@ -18,7 +18,7 @@ Now we define a sequence of points in $H, \\{P_i : i ≥ 1\\}$, as:
 - $P_2 = (\frac{-43}{6}, -4)$.
 - For $i > 2$, $P_i$ is the unique point in $H$ that is different from $P_{i - 1}$ and such that line $P_iP_{i - 1}$ is parallel to line $P_{i - 2}X$. It can be shown that $P_i$ is well-defined, and that its coordinates are always rational.
 
-<img class="img-responsive center-block" alt="animation showing defining points P_1 to P_6" src="https://cdn.freecodecamp.org/curriculum/project-euler/sequence-of-points-on-a-hyperbola.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="animation showing defining points P_1 to P_6" src="https://cdn.freecodecamp.org/curriculum/project-euler/sequence-of-points-on-a-hyperbola.gif" style="background-color: white; padding: 10px;" />
 
 You are given that $P_3 = (\frac{-19}{2}, \frac{-229}{24})$, $P_4 = (\frac{1267}{144}, \frac{-37}{12})$ and $P_7 = (\frac{17\\,194\\,218\\,091}{143\\,327\\,232}, \frac{274\\,748\\,766\\,781}{1\\,719\\,926\\,784})$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-423-consecutive-die-throws.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-423-consecutive-die-throws.md
index 9497832e44c..9969311f0de 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-423-consecutive-die-throws.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-423-consecutive-die-throws.md
@@ -14,11 +14,8 @@ A 6-sided die is thrown $n$ times. Let $c$ be the number of pairs of consecutive
 
 For example, if $n = 7$ and the values of the die throws are (1, 1, 5, 6, 6, 6, 3), then the following pairs of consecutive throws give the same value:
 
-$$\begin{align}
-  & (\underline{1}, \underline{1}, 5, 6, 6, 6, 3) \\\\
-  & (1, 1, 5, \underline{6}, \underline{6}, 6, 3) \\\\
-  & (1, 1, 5, 6, \underline{6}, \underline{6}, 3)
-\end{align}$$
+$$\begin{align}   & (\underline{1}, \underline{1}, 5, 6, 6, 6, 3) \\\\
+  & (1, 1, 5, \underline{6}, \underline{6}, 6, 3) \\\\ & (1, 1, 5, 6, \underline{6}, \underline{6}, 3) \end{align}$$
 
 Therefore, $c = 3$ for (1, 1, 5, 6, 6, 6, 3).
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-424-kakuro.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-424-kakuro.md
index ddd2fc86590..90b1b38773f 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-424-kakuro.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-424-kakuro.md
@@ -8,7 +8,7 @@ dashedName: problem-424-kakuro
 
 # --description--
 
-<img class="img-responsive center-block" alt="kakuro example" src="https://cdn.freecodecamp.org/curriculum/project-euler/kakuro.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="kakuro example" src="https://cdn.freecodecamp.org/curriculum/project-euler/kakuro.gif" style="background-color: white; padding: 10px;" />
 
 The above is an example of a cryptic kakuro (also known as cross sums, or even sums cross) puzzle, with its final solution on the right. (The common rules of kakuro puzzles can be found easily on numerous internet sites. Other related information can also be currently found at krazydad.com whose author has provided the puzzle data for this challenge.)
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-426-box-ball-system.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-426-box-ball-system.md
index 332a15aa0e3..89314f8aa76 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-426-box-ball-system.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-426-box-ball-system.md
@@ -14,21 +14,18 @@ A turn consists of moving each ball exactly once according to the following rule
 
 After one turn the sequence (2, 2, 2, 1, 2) becomes (2, 2, 1, 2, 3) as can be seen below; note that we begin the new sequence starting at the first occupied box.
 
-<img class="img-responsive center-block" alt="animation showing one complete turn from (2, 2, 2, 1, 2) to (2, 2, 1, 2, 3)" src="https://cdn.freecodecamp.org/curriculum/project-euler/box-ball-system-1.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="animation showing one complete turn from (2, 2, 2, 1, 2) to (2, 2, 1, 2, 3)" src="https://cdn.freecodecamp.org/curriculum/project-euler/box-ball-system-1.gif" style="background-color: white; padding: 10px;" />
 
 A system like this is called a Box-Ball System or BBS for short.
 
 It can be shown that after a sufficient number of turns, the system evolves to a state where the consecutive numbers of occupied boxes is invariant. In the example below, the consecutive numbers of occupied boxes evolves to [1, 2, 3]; we shall call this the final state.
 
-<img class="img-responsive center-block" alt="four turns from occupied boxes [2, 2, 2] to final state [1, 2, 3]" src="https://cdn.freecodecamp.org/curriculum/project-euler/box-ball-system-2.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="four turns from occupied boxes [2, 2, 2] to final state [1, 2, 3]" src="https://cdn.freecodecamp.org/curriculum/project-euler/box-ball-system-2.gif" style="background-color: white; padding: 10px;" />
 
 We define the sequence $\\{t_i\\}$:
 
-$$\begin{align}
-  & s_0 = 290\\,797 \\\\
-  & s_{k + 1} = {s_k}^2\bmod 50\\,515\\,093 \\\\
-  & t_k = (s_k\bmod 64) + 1
-\end{align}$$
+$$\begin{align}   & s_0 = 290\\,797 \\\\
+  & s_{k + 1} = {s_k}^2\bmod 50\\,515\\,093 \\\\ & t_k = (s_k\bmod 64) + 1 \end{align}$$
 
 Starting from the initial configuration $(t_0, t_1, \ldots, t_{10})$, the final state becomes [1, 3, 10, 24, 51, 75].
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-428-necklace-of-circles.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-428-necklace-of-circles.md
index ac3ff6f0190..bf6e6bdaa12 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-428-necklace-of-circles.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-428-necklace-of-circles.md
@@ -25,7 +25,7 @@ The triplet ($a$, $b$, $c$) is called a *necklace triplet* if you can place $k 
 
 For example, (5, 5, 5) and (4, 3, 21) are necklace triplets, while it can be shown that (2, 2, 5) is not.
 
-<img class="img-responsive center-block" alt="a visual representation of a necklace triplet" src="https://cdn.freecodecamp.org/curriculum/project-euler/necklace-of-circles.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="a visual representation of a necklace triplet" src="https://cdn.freecodecamp.org/curriculum/project-euler/necklace-of-circles.png" style="background-color: white; padding: 10px;" />
 
 Let $T(n)$ be the number of necklace triplets $(a, b, c)$ such that $a$, $b$ and $c$ are positive integers, and $b ≤ n$. For example, $T(1) = 9$, $T(20) = 732$ and $T(3\\,000) = 438\\,106$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-430-range-flips.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-430-range-flips.md
index 78a6eeed1e4..d8838dbe162 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-430-range-flips.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-430-range-flips.md
@@ -16,7 +16,7 @@ At each turn, two, not necessarily distinct, integers $A$ and $B$ between 1 and
 
 The following example shows the case $N = 8$. At the first turn $A = 5$ and $B = 2$, and at the second turn $A = 4$ and $B = 6$.
 
-<img class="img-responsive center-block" alt="example for N = 8, with first turn A = 5 and B = 2, and second turn A = 4 and B = 6" src="https://cdn.freecodecamp.org/curriculum/project-euler/range-flips.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="example for N = 8, with first turn A = 5 and B = 2, and second turn A = 4 and B = 6" src="https://cdn.freecodecamp.org/curriculum/project-euler/range-flips.gif" style="background-color: white; padding: 10px;" />
 
 Let $E(N, M)$ be the expected number of disks that show their white side after $M$ turns. We can verify that $E(3, 1) = \frac{10}{9}$, $E(3, 2) = \frac{5}{3}$, $E(10, 4) ≈ 5.157$ and $E(100, 10) ≈ 51.893$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-431-square-space-silo.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-431-square-space-silo.md
index 32bcb7efb58..4199819468b 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-431-square-space-silo.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-431-square-space-silo.md
@@ -12,7 +12,7 @@ Fred the farmer arranges to have a new storage silo installed on his farm and ha
 
 Quick thinking Quentin explains that when granular materials are delivered from above a conical slope is formed and the natural angle made with the horizontal is called the angle of repose. For example if the angle of repose, $\alpha = 30°$, and grain is delivered at the centre of the silo then a perfect cone will form towards the top of the cylinder. In the case of this silo, which has a diameter of 6m, the amount of space wasted would be approximately 32.648388556 m<sup>3</sup>. However, if grain is delivered at a point on the top which has a horizontal distance of $x$ metres from the centre then a cone with a strangely curved and sloping base is formed. He shows Fred a picture.
 
-<img class="img-responsive center-block" alt="image presenting forming of the perfect cone towards the top of the cylinder" src="https://cdn.freecodecamp.org/curriculum/project-euler/square-space-silo.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="image presenting forming of the perfect cone towards the top of the cylinder" src="https://cdn.freecodecamp.org/curriculum/project-euler/square-space-silo.png" style="background-color: white; padding: 10px;" />
 
 We shall let the amount of space wasted in cubic metres be given by $V(x)$. If $x = 1.114\\,785\\,284$, which happens to have three squared decimal places, then the amount of space wasted, $V(1.114\\,785\\,284) \approx 36$. Given the range of possible solutions to this problem there is exactly one other option: $V(2.511\\,167\\,869) \approx 49$. It would be like knowing that the square is king of the silo, sitting in splendid glory on top of your grain.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-433-steps-in-euclids-algorithm.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-433-steps-in-euclids-algorithm.md
index d90b355906a..4db4c121e91 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-433-steps-in-euclids-algorithm.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-433-steps-in-euclids-algorithm.md
@@ -10,10 +10,8 @@ dashedName: problem-433-steps-in-euclids-algorithm
 
 Let $E(x_0, y_0)$ be the number of steps it takes to determine the greatest common divisor of $x_0$ and $y_0$ with Euclid's algorithm. More formally:
 
-$$\begin{align}
-  & x_1 = y_0, y_1 = x_0\bmod y_0 \\\\
-  & x_n = y_{n - 1}, y_n = x_{n - 1}\bmod y_{n - 1}
-\end{align}$$
+$$\begin{align}   & x_1 = y_0, y_1 = x_0\bmod y_0 \\\\
+  & x_n = y_{n - 1}, y_n = x_{n - 1}\bmod y_{n - 1} \end{align}$$
 
 $E(x_0, y_0)$ is the smallest $n$ such that $y_n = 0$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-434-rigid-graphs.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-434-rigid-graphs.md
index 8c8fa902baf..a570e51bccb 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-434-rigid-graphs.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-434-rigid-graphs.md
@@ -20,11 +20,11 @@ Informally, a graph is rigid if by replacing the vertices with fully rotating hi
 
 The grid graphs embedded in the Euclidean plane are not rigid, as the following animation demonstrates:
 
-<img class="img-responsive center-block" alt="animation showing grid graphs are not rigid in Euclidean plane" src="https://cdn.freecodecamp.org/curriculum/project-euler/rigid-graphs-1.gif" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="animation showing grid graphs are not rigid in Euclidean plane" src="https://cdn.freecodecamp.org/curriculum/project-euler/rigid-graphs-1.gif" style="background-color: white; padding: 10px;" />
 
 However, one can make them rigid by adding diagonal edges to the cells. For example, for the 2x3 grid graph, there are 19 ways to make the graph rigid:
 
-<img class="img-responsive center-block" alt="19 ways to make 2x3 grid graph rigid" src="https://cdn.freecodecamp.org/curriculum/project-euler/rigid-graphs-2.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="19 ways to make 2x3 grid graph rigid" src="https://cdn.freecodecamp.org/curriculum/project-euler/rigid-graphs-2.png" style="background-color: white; padding: 10px;" />
 
 Note that for the purposes of this problem, we do not consider changing the orientation of a diagonal edge or adding both diagonal edges to a cell as a different way of making a grid graph rigid.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-437-fibonacci-primitive-roots.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-437-fibonacci-primitive-roots.md
index db2aa25da0e..47f1606285d 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-437-fibonacci-primitive-roots.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-437-fibonacci-primitive-roots.md
@@ -16,17 +16,11 @@ But there is more:
 
 If we take a closer look we see:
 
-$$\begin{align}
-  & 1 + 8 = 9 \\\\
-  & 8 + 9 = 17 ≡ 6\bmod 11 \\\\
-  & 9 + 6 = 15 ≡ 4\bmod 11 \\\\
-  & 6 + 4 = 10 \\\\
-  & 4 + 10 = 14 ≡ 3\bmod 11 \\\\
-  & 10 + 3 = 13 ≡ 2\bmod 11 \\\\
-  & 3 + 2 = 5 \\\\
-  & 2 + 5 = 7 \\\\
-  & 5 + 7 = 12 ≡ 1\bmod 11.
-\end{align}$$
+$$\begin{align}   & 1 + 8 = 9 \\\\
+  & 8 + 9 = 17 ≡ 6\bmod 11 \\\\   & 9 + 6 = 15 ≡ 4\bmod 11 \\\\
+  & 6 + 4 = 10 \\\\   & 4 + 10 = 14 ≡ 3\bmod 11 \\\\
+  & 10 + 3 = 13 ≡ 2\bmod 11 \\\\   & 3 + 2 = 5 \\\\
+  & 2 + 5 = 7 \\\\ & 5 + 7 = 12 ≡ 1\bmod 11. \end{align}$$
 
 So the powers of 8 mod 11 are cyclic with period 10, and $8^n + 8^{n + 1} ≡ 8^{n + 2} (\text{mod } 11)$. 8 is called a Fibonacci primitive root of 11.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-440-gcd-and-tiling.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-440-gcd-and-tiling.md
index 91d21dddaf6..49afa9608aa 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-440-gcd-and-tiling.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-440-gcd-and-tiling.md
@@ -10,11 +10,11 @@ dashedName: problem-440-gcd-and-tiling
 
 We want to tile a board of length $n$ and height 1 completely, with either 1 × 2 blocks or 1 × 1 blocks with a single decimal digit on top:
 
-<img class="img-responsive center-block" alt="ten blocks 1x1 with single decimal digit on top, and 1x2 block" src="https://cdn.freecodecamp.org/curriculum/project-euler/gcd-and-tiling-1.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="ten blocks 1x1 with single decimal digit on top, and 1x2 block" src="https://cdn.freecodecamp.org/curriculum/project-euler/gcd-and-tiling-1.png" style="background-color: white; padding: 10px;" />
 
 For example, here are some of the ways to tile a board of length $n = 8$:
 
-<img class="img-responsive center-block" alt="examples of ways to tile a board of length n = 8" src="https://cdn.freecodecamp.org/curriculum/project-euler/gcd-and-tiling-2.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="examples of ways to tile a board of length n = 8" src="https://cdn.freecodecamp.org/curriculum/project-euler/gcd-and-tiling-2.png" style="background-color: white; padding: 10px;" />
 
 Let $T(n)$ be the number of ways to tile a board of length $n$ as described above.
 
@@ -24,11 +24,8 @@ Let $S(L)$ be the triple sum $\sum_{a, b, c} gcd(T(c^a), T(c^b))$ for $1 ≤ a,
 
 For example:
 
-$$\begin{align}
-  & S(2) = 10\\,444 \\\\
-  & S(3) = 1\\,292\\,115\\,238\\,446\\,807\\,016\\,106\\,539\\,989 \\\\
-  & S(4)\bmod 987\\,898\\,789 = 670\\,616\\,280.
-\end{align}$$
+$$\begin{align}   & S(2) = 10\\,444 \\\\
+  & S(3) = 1\\,292\\,115\\,238\\,446\\,807\\,016\\,106\\,539\\,989 \\\\ & S(4)\bmod 987\\,898\\,789 = 670\\,616\\,280. \end{align}$$
 
 Find $S(2000)\bmod 987\\,898\\,789$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-443-gcd-sequence.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-443-gcd-sequence.md
index d9cfbf04795..17fc8db1cb5 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-443-gcd-sequence.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-443-gcd-sequence.md
@@ -10,17 +10,13 @@ dashedName: problem-443-gcd-sequence
 
 Let $g(n)$ be a sequence defined as follows:
 
-$$\begin{align}
-  & g(4) = 13, \\\\
-  & g(n) = g(n-1) + gcd(n, g(n - 1)) \text{ for } n > 4.
-\end{align}$$
+$$\begin{align}   & g(4) = 13, \\\\
+  & g(n) = g(n-1) + gcd(n, g(n - 1)) \text{ for } n > 4. \end{align}$$
 
 The first few values are:
 
-$$\begin{array}{l}
-  n    & 4  & 5  & 6  & 7  & 8  & 9  & 10 & 11 & 12 & 13 & 14 & 15 & 16 & 17 & 18 & 19 & 20 & \ldots \\\\
-  g(n) & 13 & 14 & 16 & 17 & 18 & 27 & 28 & 29 & 30 & 31 & 32 & 33 & 34 & 51 & 54 & 55 & 60 & \ldots
-\end{array}$$
+$$\begin{array}{l}   n    & 4  & 5  & 6  & 7  & 8  & 9  & 10 & 11 & 12 & 13 & 14 & 15 & 16 & 17 & 18 & 19 & 20 & \ldots \\\\
+  g(n) & 13 & 14 & 16 & 17 & 18 & 27 & 28 & 29 & 30 & 31 & 32 & 33 & 34 & 51 & 54 & 55 & 60 & \ldots \end{array}$$
 
 You are given that $g(1\\,000) = 2\\,524$ and $g(1\\,000\\,000) = 2\\,624\\,152$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-450-hypocycloid-and-lattice-points.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-450-hypocycloid-and-lattice-points.md
index 8460397f7fc..9bfd7f5d15a 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-450-hypocycloid-and-lattice-points.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-450-hypocycloid-and-lattice-points.md
@@ -24,11 +24,8 @@ Let $T(N) = \sum_{R = 3}^N \sum_{r=1}^{\left\lfloor \frac{R - 1}{2} \right\rfloo
 
 You are given:
 
-$$\begin{align}
-  C(3, 1) = & \\{(3, 0), (-1, 2), (-1,0), (-1,-2)\\} \\\\
-  C(2500, 1000) = & \\{(2500, 0), (772, 2376), (772, -2376), (516, 1792), (516, -1792), (500, 0), (68, 504), \\\\
-                  &(68, -504),(-1356, 1088), (-1356, -1088), (-1500, 1000), (-1500, -1000)\\}
-\end{align}$$
+$$\begin{align}   C(3, 1) = & \\{(3, 0), (-1, 2), (-1,0), (-1,-2)\\} \\\\
+  C(2500, 1000) = & \\{(2500, 0), (772, 2376), (772, -2376), (516, 1792), (516, -1792), (500, 0), (68, 504), \\\\ &(68, -504),(-1356, 1088), (-1356, -1088), (-1500, 1000), (-1500, -1000)\\} \end{align}$$
 
 **Note:** (-625, 0) is not an element of $C(2500, 1000)$ because $\sin(t)$ is not a rational number for the corresponding values of $t$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-451-modular-inverses.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-451-modular-inverses.md
index a4f286b70b8..39ebff17846 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-451-modular-inverses.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-451-modular-inverses.md
@@ -14,14 +14,10 @@ There are eight positive numbers less than 15 which are coprime to 15: 1, 2, 4,
 
 The modular inverses of these numbers modulo 15 are: 1, 8, 4, 13, 2, 11, 7, 14 because
 
-$$\begin{align}
-  & 1  \times 1\bmod 15 = 1 \\\\
-  & 2  \times 8  = 16\bmod 15 = 1 \\\\
-  & 4  \times 4  = 16\bmod 15 = 1 \\\\
-  & 7  \times 13 = 91\bmod 15 = 1 \\\\
-  & 11 \times 11 = 121\bmod 15 = 1 \\\\
-  & 14 \times 14 = 196\bmod 15 = 1
-\end{align}$$
+$$\begin{align}   & 1  \times 1\bmod 15 = 1 \\\\
+  & 2  \times 8  = 16\bmod 15 = 1 \\\\   & 4  \times 4  = 16\bmod 15 = 1 \\\\
+  & 7  \times 13 = 91\bmod 15 = 1 \\\\   & 11 \times 11 = 121\bmod 15 = 1 \\\\
+  & 14 \times 14 = 196\bmod 15 = 1 \end{align}$$
 
 Let $I(n)$ be the largest positive number $m$ smaller than $n - 1$ such that the modular inverse of $m$ modulo $n$ equals $m$ itself.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-453-lattice-quadrilaterals.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-453-lattice-quadrilaterals.md
index 391f8b818c7..f809ebc60a5 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-453-lattice-quadrilaterals.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-453-lattice-quadrilaterals.md
@@ -14,7 +14,7 @@ Let $Q(m, n)$ be the number of simple quadrilaterals whose vertices are lattice
 
 For example, $Q(2, 2) = 94$ as can be seen below:
 
-<img class="img-responsive center-block" alt="94 quadrilaterals whose vertices are lattice points with coordinates (x, y) satiffying 0 &le; x &le; m and 0 &le; y &le; n" src="https://cdn.freecodecamp.org/curriculum/project-euler/lattice-quadrilaterals.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="94 quadrilaterals whose vertices are lattice points with coordinates (x, y) satiffying 0 &le; x &le; m and 0 &le; y &le; n" src="https://cdn.freecodecamp.org/curriculum/project-euler/lattice-quadrilaterals.png" style="background-color: white; padding: 10px;" />
 
 It can also be verified that $Q(3, 7) = 39\\,590$, $Q(12, 3) = 309\\,000$ and $Q(123, 45) = 70\\,542\\,215\\,894\\,646$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-455-powers-with-trailing-digits.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-455-powers-with-trailing-digits.md
index 1a0f74b0ee3..7b24e547835 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-455-powers-with-trailing-digits.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-455-powers-with-trailing-digits.md
@@ -10,14 +10,11 @@ dashedName: problem-455-powers-with-trailing-digits
 
 Let $f(n)$ be the largest positive integer $x$ less than ${10}^9$ such that the last 9 digits of $n^x$ form the number $x$ (including leading zeros), or zero if no such integer exists.
 
-For example:
+예시:
 
-$$\begin{align}
-  & f(4) = 411\\,728\\,896 (4^{411\\,728\\,896} = ...490\underline{411728896}) \\\\
-  & f(10) = 0 \\\\
-  & f(157) = 743\\,757 (157^{743\\,757} = ...567\underline{000743757}) \\\\
-  & Σf(n), 2 ≤ n ≤ 103 = 442\\,530\\,011\\,399
-\end{align}$$
+$$\begin{align}   & f(4) = 411\\,728\\,896 (4^{411\\,728\\,896} = ...490\underline{411728896}) \\\\
+  & f(10) = 0 \\\\   & f(157) = 743\\,757 (157^{743\\,757} = ...567\underline{000743757}) \\\\
+  & Σf(n), 2 ≤ n ≤ 103 = 442\\,530\\,011\\,399 \end{align}$$
 
 Find $\sum f(n)$, $2 ≤ n ≤ {10}^6$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-456-triangles-containing-the-origin-ii.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-456-triangles-containing-the-origin-ii.md
index f4284a86faf..b622b8ac411 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-456-triangles-containing-the-origin-ii.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-456-triangles-containing-the-origin-ii.md
@@ -10,24 +10,17 @@ dashedName: problem-456-triangles-containing-the-origin-ii
 
 Define:
 
-$$\begin{align}
-  & x_n = ({1248}^n\bmod 32323) - 16161 \\\\
-  & y_n = ({8421}^n\bmod 30103) - 15051 \\\\
-  & P_n = \\{(x_1, y_1), (x_2, y_2), \ldots, (x_n, y_n)\\}
-\end{align}$$
+$$\begin{align}   & x_n = ({1248}^n\bmod 32323) - 16161 \\\\
+  & y_n = ({8421}^n\bmod 30103) - 15051 \\\\ & P_n = \\{(x_1, y_1), (x_2, y_2), \ldots, (x_n, y_n)\\} \end{align}$$
 
-For example,
-$$P_8 = \\{(-14913, -6630), (-10161, 5625), (5226, 11896), (8340, -10778), (15852, -5203), (-15165, 11295), (-1427, -14495), (12407, 1060)\\}$$
+For example, $$P_8 = \\{(-14913, -6630), (-10161, 5625), (5226, 11896), (8340, -10778), (15852, -5203), (-15165, 11295), (-1427, -14495), (12407, 1060)\\}$$
 
 Let $C(n)$ be the number of triangles whose vertices are in $P_n$ which contain the origin in the interior.
 
 Examples:
 
-$$\begin{align}
-  & C(8) = 20 \\\\
-  & C(600) = 8\\,950\\,634 \\\\
-  & C(40\\,000) = 2\\,666\\,610\\,948\\,988
-\end{align}$$
+$$\begin{align}   & C(8) = 20 \\\\
+  & C(600) = 8\\,950\\,634 \\\\ & C(40\\,000) = 2\\,666\\,610\\,948\\,988 \end{align}$$
 
 Find $C(2\\,000\\,000)$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-459-flipping-game.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-459-flipping-game.md
index afb26476054..13473d922bf 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-459-flipping-game.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-459-flipping-game.md
@@ -20,7 +20,7 @@ A turn consists of flipping all disks in a rectangle with the following properti
 - the rectangle width is a perfect square (1, 4, 9, 16, ...)
 - the rectangle height is a triangular number (1, 3, 6, 10, ...)
 
-<img class="img-responsive center-block" alt="flipping all disks in a 4x3 rectangle on a 5x5 board" src="https://cdn.freecodecamp.org/curriculum/project-euler/flipping-game-1.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="flipping all disks in a 4x3 rectangle on a 5x5 board" src="https://cdn.freecodecamp.org/curriculum/project-euler/flipping-game-1.png" style="background-color: white; padding: 10px;" />
 
 Players alternate turns. A player wins by turning the grid all black.
 
@@ -30,7 +30,7 @@ $W(1) = 1$, $W(2) = 0$, $W(5) = 8$ and $W({10}^2) = 31\\,395$.
 
 For $N = 5$, the first player's eight winning first moves are:
 
-<img class="img-responsive center-block" alt="eight winning first moves for N = 5" src="https://cdn.freecodecamp.org/curriculum/project-euler/flipping-game-2.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="eight winning first moves for N = 5" src="https://cdn.freecodecamp.org/curriculum/project-euler/flipping-game-2.png" style="background-color: white; padding: 10px;" />
 
 Find $W({10}^6)$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-460-an-ant-on-the-move.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-460-an-ant-on-the-move.md
index 405654158fe..2bb68f203f4 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-460-an-ant-on-the-move.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-460-an-ant-on-the-move.md
@@ -23,7 +23,7 @@ Thus the total required time is $1.2283 + 0.6667 + 1.2283 = 3.1233$.
 
 The right image is another path. The total required time is calculated as $0.98026 + 1 + 0.98026 = 2.96052$. It can be shown that this is the quickest path for $d = 4$.
 
-<img class="img-responsive center-block" alt="two possible paths for d = 4" src="https://cdn.freecodecamp.org/curriculum/project-euler/an-ant-on-the-move.jpg" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="two possible paths for d = 4" src="https://cdn.freecodecamp.org/curriculum/project-euler/an-ant-on-the-move.jpg" style="background-color: white; padding: 10px;" />
 
 Let $F(d)$ be the total required time if the ant chooses the quickest path. For example, $F(4) ≈ 2.960\\,516\\,287$. We can verify that $F(10) ≈ 4.668\\,187\\,834$ and $F(100) ≈ 9.217\\,221\\,972$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-461-almost-pi.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-461-almost-pi.md
index 8eb0e298723..1ff7e49ee6b 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-461-almost-pi.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-461-almost-pi.md
@@ -56,7 +56,7 @@ assert.strictEqual(almostPi(200), 64658);
 
 ```js
 function almostPi(n) {
-  
+
   return true;
 }
 ```
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-463-a-weird-recurrence-relation.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-463-a-weird-recurrence-relation.md
index 168f99d525c..a8e3607195e 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-463-a-weird-recurrence-relation.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-463-a-weird-recurrence-relation.md
@@ -10,13 +10,9 @@ dashedName: problem-463-a-weird-recurrence-relation
 
 The function $f$ is defined for all positive integers as follows:
 
-$$\begin{align}
-  & f(1) = 1 \\\\
-  & f(3) = 3 \\\\
-  & f(2n) = f(n) \\\\
-  & f(4n + 1) = 2f(2n + 1) - f(n) \\\\
-  & f(4n + 3) = 3f(2n + 1) - 2f(n)
-\end{align}$$
+$$\begin{align}   & f(1) = 1 \\\\
+  & f(3) = 3 \\\\   & f(2n) = f(n) \\\\
+  & f(4n + 1) = 2f(2n + 1) - f(n) \\\\ & f(4n + 3) = 3f(2n + 1) - 2f(n) \end{align}$$
 
 The function $S(n)$ is defined as $\sum_{i=1}^{n} f(i)$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-465-polar-polygons.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-465-polar-polygons.md
index ec34690f6ff..57ad5b291d6 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-465-polar-polygons.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-465-polar-polygons.md
@@ -14,7 +14,7 @@ For this problem, a polygon can have collinear consecutive vertices. However, a
 
 For example, only the first of the following is a polar polygon (the kernels of the second, third, and fourth do not strictly contain the origin, and the fifth does not have a kernel at all):
 
-<img class="img-responsive center-block" alt="five example polygons" src="https://cdn.freecodecamp.org/curriculum/project-euler/polar-polygons.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="five example polygons" src="https://cdn.freecodecamp.org/curriculum/project-euler/polar-polygons.png" style="background-color: white; padding: 10px;" />
 
 Notice that the first polygon has three consecutive collinear vertices.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-466-distinct-terms-in-a-multiplication-table.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-466-distinct-terms-in-a-multiplication-table.md
index f362b243c5d..cfefe6e7b9f 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-466-distinct-terms-in-a-multiplication-table.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-466-distinct-terms-in-a-multiplication-table.md
@@ -12,21 +12,16 @@ Let $P(m,n)$ be the number of distinct terms in an $m×n$ multiplication table.
 
 For example, a 3×4 multiplication table looks like this:
 
-$$\begin{array}{c}
-  ×          & \mathbf{1} & \mathbf{2} & \mathbf{3} & \mathbf{4}  \\\\
-  \mathbf{1} & 1          & 2          & 3          & 4  \\\\
-  \mathbf{2} & 2          & 4          & 6          & 8  \\\\
-  \mathbf{3} & 3          & 6          & 9          & 12
-\end{array}$$
+$$\begin{array}{c}   ×          & \mathbf{1} & \mathbf{2} & \mathbf{3} & \mathbf{4}  \\\\
+  \mathbf{1} & 1          & 2          & 3          & 4  \\\\   \mathbf{2} & 2          & 4          & 6          & 8  \\\\
+  \mathbf{3} & 3          & 6          & 9          & 12 \end{array}$$
 
 There are 8 distinct terms {1, 2, 3, 4, 6, 8, 9, 12}, therefore $P(3, 4) = 8$.
 
 You are given that:
 
-$$\begin{align}
-  & P(64, 64) = 1\\,263, \\\\
-  & P(12, 345) = 1\\,998, \text{ and} \\\\
-  & P(32, {10}^{15}) = 13\\,826\\,382\\,602\\,124\\,302. \\\\
+$$\begin{align}   & P(64, 64) = 1\\,263, \\\\
+  & P(12, 345) = 1\\,998, \text{ and} \\\\   & P(32, {10}^{15}) = 13\\,826\\,382\\,602\\,124\\,302. \\\\
 \end{align}$$
 
 Find $P(64, {10}^{16})$.
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-467-superinteger.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-467-superinteger.md
index f3c46934f29..9b0caad1704 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-467-superinteger.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-467-superinteger.md
@@ -14,24 +14,18 @@ For example, 2718281828 is a superinteger of 18828, while 314159 is not a superi
 
 Let $p(n)$ be the $n$th prime number, and let $c(n)$ be the $n$th composite number. For example, $p(1) = 2$, $p(10) = 29$, $c(1) = 4$ and $c(10) = 18$.
 
-$$\begin{align}
-  & \\{p(i) : i ≥ 1\\} = \\{2, 3, 5, 7, 11, 13, 17, 19, 23, 29, \ldots \\} \\\\
-  & \\{c(i) : i ≥ 1\\} = \\{4, 6, 8, 9, 10, 12, 14, 15, 16, 18, \ldots \\}
-\end{align}$$
+$$\begin{align}   & \\{p(i) : i ≥ 1\\} = \\{2, 3, 5, 7, 11, 13, 17, 19, 23, 29, \ldots \\} \\\\
+  & \\{c(i) : i ≥ 1\\} = \\{4, 6, 8, 9, 10, 12, 14, 15, 16, 18, \ldots \\} \end{align}$$
 
 Let $P^D$ the sequence of the digital roots of $\\{p(i)\\}$ ($C^D$ is defined similarly for $\\{c(i)\\}$):
 
-$$\begin{align}
-  & P^D = \\{2, 3, 5, 7, 2, 4, 8, 1, 5, 2, \ldots \\} \\\\
-  & C^D = \\{4, 6, 8, 9, 1, 3, 5, 6, 7, 9, \ldots \\}
-\end{align}$$
+$$\begin{align}   & P^D = \\{2, 3, 5, 7, 2, 4, 8, 1, 5, 2, \ldots \\} \\\\
+  & C^D = \\{4, 6, 8, 9, 1, 3, 5, 6, 7, 9, \ldots \\} \end{align}$$
 
 Let $P_n$ be the integer formed by concatenating the first $n$ elements of $P^D$ ($C_n$ is defined similarly for $C^D$).
 
-$$\begin{align}
-  & P_{10} = 2\\,357\\,248\\,152 \\\\
-  & C_{10} = 4\\,689\\,135\\,679
-\end{align}$$
+$$\begin{align}   & P_{10} = 2\\,357\\,248\\,152 \\\\
+  & C_{10} = 4\\,689\\,135\\,679 \end{align}$$
 
 Let $f(n)$ be the smallest positive integer that is a common superinteger of $P_n$ and $C_n$. For example, $f(10) = 2\\,357\\,246\\,891\\,352\\,679$, and $f(100)\bmod 1\\,000\\,000\\,007 = 771\\,661\\,825$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-468-smooth-divisors-of-binomial-coefficients.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-468-smooth-divisors-of-binomial-coefficients.md
index 04f9a164613..af311d514ce 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-468-smooth-divisors-of-binomial-coefficients.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-468-smooth-divisors-of-binomial-coefficients.md
@@ -12,23 +12,17 @@ An integer is called B-smooth if none of its prime factors is greater than $B$.
 
 Let $SB(n)$ be the largest B-smooth divisor of $n$.
 
-Examples:
+예:
 
-$$\begin{align}
-  & S_1(10) = 1 \\\\
-  & S_4(2\\,100) = 12 \\\\
-  & S_{17}(2\\,496\\,144) = 5\\,712
-\end{align}$$
+$$\begin{align}   & S_1(10) = 1 \\\\
+  & S_4(2\\,100) = 12 \\\\ & S_{17}(2\\,496\\,144) = 5\\,712 \end{align}$$
 
 Define $F(n) = \displaystyle\sum_{B = 1}^n \sum_{r = 0}^n S_B(\displaystyle\binom{n}{r})$. Here, $\displaystyle\binom{n}{r}$ denotes the binomial coefficient.
 
 Examples:
 
-$$\begin{align}
-  & F(11) = 3132 \\\\
-  & F(1\\,111)\bmod 1\\,000\\,000\\,993 = 706\\,036\\,312 \\\\
-  & F(111\\,111)\bmod 1\\,000\\,000\\,993 = 22\\,156\\,169
-\end{align}$$
+$$\begin{align}   & F(11) = 3132 \\\\
+  & F(1\\,111)\bmod 1\\,000\\,000\\,993 = 706\\,036\\,312 \\\\ & F(111\\,111)\bmod 1\\,000\\,000\\,993 = 22\\,156\\,169 \end{align}$$
 
 Find $F(11\\,111\\,111)\bmod 1\\,000\\,000\\,993$.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-471-triangle-inscribed-in-ellipse.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-471-triangle-inscribed-in-ellipse.md
index da790b74fa5..87fba0ff50a 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-471-triangle-inscribed-in-ellipse.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-471-triangle-inscribed-in-ellipse.md
@@ -14,9 +14,9 @@ Let $r(a, b)$ be the radius of the incircle of $ΔABC$ when the incircle has cen
 
 For example, $r(3, 1) = \frac{1}{2}, r(6, 2) = 1, r(12, 3) = 2$.
 
-<img class="img-responsive center-block" alt="triangle ΔABC inscribed in an ellipse, radius of the incircle of ΔABC r(6, 2) = 1" src="https://cdn.freecodecamp.org/curriculum/project-euler/triangle-inscribed-in-ellipse-1.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="triangle ΔABC inscribed in an ellipse, radius of the incircle of ΔABC r(6, 2) = 1" src="https://cdn.freecodecamp.org/curriculum/project-euler/triangle-inscribed-in-ellipse-1.png" style="background-color: white; padding: 10px;" />
 
-<img class="img-responsive center-block" alt="triangle ΔABC inscribed in an ellipse, radius of the incircle of ΔABC r(12, 3) = 2" src="https://cdn.freecodecamp.org/curriculum/project-euler/triangle-inscribed-in-ellipse-2.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="triangle ΔABC inscribed in an ellipse, radius of the incircle of ΔABC r(12, 3) = 2" src="https://cdn.freecodecamp.org/curriculum/project-euler/triangle-inscribed-in-ellipse-2.png" style="background-color: white; padding: 10px;" />
 
 Let $G(n) = \sum_{a = 3}^n \sum_{b = 1}^{\left\lfloor\frac{a - 1}{2} \right\rfloor} r(a, b)$
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-472-comfortable-distance-ii.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-472-comfortable-distance-ii.md
index f4a0fe402b7..25c9c601cf6 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-472-comfortable-distance-ii.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-472-comfortable-distance-ii.md
@@ -18,7 +18,7 @@ Note that due to rule 1, some seats will surely be left unoccupied, and the maxi
 
 Here are the possible seating arrangements for $N = 15$:
 
-<img class="img-responsive center-block" alt="seating arrangements for N = 15" src="https://cdn.freecodecamp.org/curriculum/project-euler/comfortable-distance-ii.png" style="background-color: white; padding: 10px;">
+<img class="img-responsive center-block" alt="seating arrangements for N = 15" src="https://cdn.freecodecamp.org/curriculum/project-euler/comfortable-distance-ii.png" style="background-color: white; padding: 10px;" />
 
 We see that if the first person chooses correctly, the 15 seats can seat up to 7 people. We can also see that the first person has 9 choices to maximize the number of people that may be seated.
 
diff --git a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-480-the-last-question.md b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-480-the-last-question.md
index fbe75d0ddb7..b07b59bb692 100644
--- a/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-480-the-last-question.md
+++ b/curriculum/challenges/korean/18-project-euler/project-euler-problems-401-to-480/problem-480-the-last-question.md
@@ -16,34 +16,20 @@ Suppose those with 15 letters or less are listed in alphabetical order and numbe
 
 The list would include:
 
-$$\begin{align}
-  & 1: \text{a} \\\\
-  & 2: \text{aa} \\\\
-  & 3: \text{aaa} \\\\
-  & 4: \text{aaaa} \\\\
-  & 5: \text{aaaaa} \\\\
-  & 6: \text{aaaaaa} \\\\
-  & 7: \text{aaaaaac} \\\\
-  & 8: \text{aaaaaacd} \\\\
-  & 9: \text{aaaaaacde} \\\\
-  & 10: \text{aaaaaacdee} \\\\
-  & 11: \text{aaaaaacdeee} \\\\
-  & 12: \text{aaaaaacdeeee} \\\\
-  & 13: \text{aaaaaacdeeeee} \\\\
-  & 14: \text{aaaaaacdeeeeee} \\\\
-  & 15: \text{aaaaaacdeeeeeef} \\\\
-  & 16: \text{aaaaaacdeeeeeeg} \\\\
-  & 17: \text{aaaaaacdeeeeeeh} \\\\
-  & \ldots \\\\
-  & 28: \text{aaaaaacdeeeeeey} \\\\
-  & 29: \text{aaaaaacdeeeeef} \\\\
-  & 30: \text{aaaaaacdeeeeefe} \\\\
-  & \ldots \\\\
-  & 115246685191495242: \text{euleoywuttttsss} \\\\
-  & 115246685191495243: \text{euler} \\\\
-  & 115246685191495244: \text{eulera} \\\\
-  & ... \\\\
-  & 525069350231428029: \text{ywuuttttssssrrr} \\\\
+$$\begin{align}   & 1: \text{a} \\\\
+  & 2: \text{aa} \\\\   & 3: \text{aaa} \\\\
+  & 4: \text{aaaa} \\\\   & 5: \text{aaaaa} \\\\
+  & 6: \text{aaaaaa} \\\\   & 7: \text{aaaaaac} \\\\
+  & 8: \text{aaaaaacd} \\\\   & 9: \text{aaaaaacde} \\\\
+  & 10: \text{aaaaaacdee} \\\\   & 11: \text{aaaaaacdeee} \\\\
+  & 12: \text{aaaaaacdeeee} \\\\   & 13: \text{aaaaaacdeeeee} \\\\
+  & 14: \text{aaaaaacdeeeeee} \\\\   & 15: \text{aaaaaacdeeeeeef} \\\\
+  & 16: \text{aaaaaacdeeeeeeg} \\\\   & 17: \text{aaaaaacdeeeeeeh} \\\\
+  & \ldots \\\\   & 28: \text{aaaaaacdeeeeeey} \\\\
+  & 29: \text{aaaaaacdeeeeef} \\\\   & 30: \text{aaaaaacdeeeeefe} \\\\
+  & \ldots \\\\   & 115246685191495242: \text{euleoywuttttsss} \\\\
+  & 115246685191495243: \text{euler} \\\\   & 115246685191495244: \text{eulera} \\\\
+  & ... \\\\   & 525069350231428029: \text{ywuuttttssssrrr} \\\\
 \end{align}$$
 
 Define $P(w)$ as the position of the word $w$.
@@ -54,15 +40,11 @@ We can see that $P(w)$ and $W(p)$ are inverses: $P(W(p)) = p$ and $W(P(w)) = w$.
 
 Examples:
 
-$$\begin{align}
-  & W(10) = \text{ aaaaaacdee} \\\\
-  & P(\text{aaaaaacdee}) = 10 \\\\
-  & W(115246685191495243) = \text{ euler} \\\\
-  & P(\text{euler}) = 115246685191495243 \\\\
-\end{align}$$
+$$\begin{align}   & W(10) = \text{ aaaaaacdee} \\\\
+  & P(\text{aaaaaacdee}) = 10 \\\\   & W(115246685191495243) = \text{ euler} \\\\
+  & P(\text{euler}) = 115246685191495243 \\\\ \end{align}$$
 
-Find
-$$W(P(\text{legionary}) + P(\text{calorimeters}) - P(\text{annihilate}) + P(\text{orchestrated}) - P(\text{fluttering})).$$
+Find $$W(P(\text{legionary}) + P(\text{calorimeters}) - P(\text{annihilate}) + P(\text{orchestrated}) - P(\text{fluttering})).$$
 
 Give your answer using lowercase characters (no punctuation or space).
 
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/add-looping-logic-to-your-code-using-the-do-while-and-while-statements-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/add-looping-logic-to-your-code-using-the-do-while-and-while-statements-in-c-sharp.md
index a0ea5a41821..d5de7121c15 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/add-looping-logic-to-your-code-using-the-do-while-and-while-statements-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/add-looping-logic-to-your-code-using-the-do-while-and-while-statements-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e1f4e8acb466c97ccbedf
-title: Add Looping Logic to Your Code Using the do-while and while Statements in C#
+title: 'Add Looping Logic to Your Code Using the do-while and while Statements in C#'
 challengeType: 19
 dashedName: add-looping-logic-to-your-code-using-the-do-while-and-while-statements-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/branch-the-flow-of-code-using-the-switch-case-construct-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/branch-the-flow-of-code-using-the-switch-case-construct-in-c-sharp.md
index 2401c297a4a..ee50cb1473b 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/branch-the-flow-of-code-using-the-switch-case-construct-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/branch-the-flow-of-code-using-the-switch-case-construct-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e214b8acb466c97ccbee0
-title: Branch the Flow of Code Using the switch-case Construct in C#
+title: 'Branch the Flow of Code Using the switch-case Construct in C#'
 challengeType: 19
 dashedName: branch-the-flow-of-code-using-the-switch-case-construct-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md
index 5c029319f67..a837a683f26 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/challenge-project-develop-branching-and-looping-structures-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e21598acb466c97ccbee1
-title: Challenge Project - Develop Branching and Looping Structures in C#
+title: 'Challenge Project - Develop Branching and Looping Structures in C#'
 challengeType: 19
 dashedName: challenge-project-develop-branching-and-looping-structures-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/control-variable-scope-and-logic-using-code-blocks-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/control-variable-scope-and-logic-using-code-blocks-in-c-sharp.md
index 440cfb4eba4..68fae6e49b2 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/control-variable-scope-and-logic-using-code-blocks-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/control-variable-scope-and-logic-using-code-blocks-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e21658acb466c97ccbee2
-title: Control Variable Scope and Logic Using Code Blocks in C#
+title: 'Control Variable Scope and Logic Using Code Blocks in C#'
 challengeType: 19
 dashedName: control-variable-scope-and-logic-using-code-blocks-in-c-sharp
 ---
@@ -20,7 +20,7 @@ Complete the <a href="https://learn.microsoft.com/training/modules/csharp-code-b
 
 ## --text--
 
-Which of the following statements is true about showing/removing the curly braces for code blocks associated with an `if` statement? 
+Which of the following statements is true about showing/removing the curly braces for code blocks associated with an `if` statement?
 
 ## --answers--
 
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md
index 36e94dd7bfe..f1d60edd59a 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/evaluate-boolean-expressions-to-make-decisions-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e21708acb466c97ccbee3
-title: Evaluate Boolean Expressions to Make Decisions in C#
+title: 'Evaluate Boolean Expressions to Make Decisions in C#'
 challengeType: 19
 dashedName: evaluate-boolean-expressions-to-make-decisions-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/guided-project-develop-conditional-branching-and-looping-structures-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/guided-project-develop-conditional-branching-and-looping-structures-in-c-sharp.md
index a832bd23c3a..a678783a004 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/guided-project-develop-conditional-branching-and-looping-structures-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/guided-project-develop-conditional-branching-and-looping-structures-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e217e8acb466c97ccbee4
-title: Guided Project - Develop Conditional Branching and Looping Structures in C#
+title: 'Guided Project - Develop Conditional Branching and Looping Structures in C#'
 challengeType: 19
 dashedName: guided-project-develop-conditional-branching-and-looping-structures-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/iterate-through-a-code-block-using-the-for-statement-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/iterate-through-a-code-block-using-the-for-statement-in-c-sharp.md
index c5fc3976e65..d85cd9e79c5 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/iterate-through-a-code-block-using-the-for-statement-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/iterate-through-a-code-block-using-the-for-statement-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e218f8acb466c97ccbee5
-title: Iterate Through a Code Block Using the for Statement in C#
+title: 'Iterate Through a Code Block Using the for Statement in C#'
 challengeType: 19
 dashedName: iterate-through-a-code-block-using-the-for-statement-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/trophy-add-logic-to-c-sharp-console-applications.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/trophy-add-logic-to-c-sharp-console-applications.md
index b04182a6cf5..31e5799bf8a 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/trophy-add-logic-to-c-sharp-console-applications.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/add-logic-to-c-sharp-console-applications/trophy-add-logic-to-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647f882207d29547b3bee1c0
-title: Trophy - Add Logic to C# Console Applications
+title: 'Trophy - Add Logic to C# Console Applications'
 challengeType: 18
 dashedName: trophy-add-logic-to-c-sharp-console-applications
 msTrophyId: learn.wwl.get-started-c-sharp-part-3.trophy
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/add-decision-logic-to-your-code-using-if-else-and-else-if-statements-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/add-decision-logic-to-your-code-using-if-else-and-else-if-statements-in-c-sharp.md
index fe1b43f206a..b4c34681581 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/add-decision-logic-to-your-code-using-if-else-and-else-if-statements-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/add-decision-logic-to-your-code-using-if-else-and-else-if-statements-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e21ba8acb466c97ccbee6
-title: Add Decision Logic to Your Code Using if, else, and else if statements in C#
+title: 'Add Decision Logic to Your Code Using if, else, and else if statements in C#'
 challengeType: 19
 dashedName: add-decision-logic-to-your-code-using-if-else-and-else-if-statements-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/call-methods-from-the-dot-net-class-library-using-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/call-methods-from-the-dot-net-class-library-using-c-sharp.md
index a6c3860ab62..64ee30462ef 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/call-methods-from-the-dot-net-class-library-using-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/call-methods-from-the-dot-net-class-library-using-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e21c48acb466c97ccbee7
-title: Call Methods From the .NET Class Library Using C#
+title: 'Call Methods From the .NET Class Library Using C#'
 challengeType: 19
 dashedName: call-methods-from-the-dot-net-class-library-using-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/challenge-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/challenge-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md
index d7f3d16f3d9..c19935da753 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/challenge-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/challenge-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e21d08acb466c97ccbee8
-title: Challenge Project - Develop foreach and if-elseif-else Structures to Process Array Data in C#
+title: 'Challenge Project - Develop foreach and if-elseif-else Structures to Process Array Data in C#'
 challengeType: 19
 dashedName: challenge-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/create-readable-code-with-conventions-whitespace-and-comments-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/create-readable-code-with-conventions-whitespace-and-comments-in-c-sharp.md
index e6c7b5d6f34..221d8229223 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/create-readable-code-with-conventions-whitespace-and-comments-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/create-readable-code-with-conventions-whitespace-and-comments-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e21df8acb466c97ccbee9
-title: Create Readable Code with Conventions, Whitespace, and Comments in C#
+title: 'Create Readable Code with Conventions, Whitespace, and Comments in C#'
 challengeType: 19
 dashedName: create-readable-code-with-conventions-whitespace-and-comments-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/guided-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/guided-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md
index 3cebd1ae286..af1892b527b 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/guided-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/guided-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e21eb8acb466c97ccbeea
-title: Guided Project - Develop foreach and if-elseif-else Structures to Process Array Data in C#
+title: 'Guided Project - Develop foreach and if-elseif-else Structures to Process Array Data in C#'
 challengeType: 19
 dashedName: guided-project-develop-foreach-and-if-elseif-else-structures-to-process-array-data-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/store-and-iterate-through-sequences-of-data-using-arrays-and-the-foreach-statement-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/store-and-iterate-through-sequences-of-data-using-arrays-and-the-foreach-statement-in-c-sharp.md
index fbcf0943a37..33713c19393 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/store-and-iterate-through-sequences-of-data-using-arrays-and-the-foreach-statement-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/store-and-iterate-through-sequences-of-data-using-arrays-and-the-foreach-statement-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e22058acb466c97ccbeec
-title: Store and Iterate Through Sequences of Data Using Arrays and the foreach Statement in C#
+title: 'Store and Iterate Through Sequences of Data Using Arrays and the foreach Statement in C#'
 challengeType: 19
 dashedName: store-and-iterate-through-sequences-of-data-using-arrays-and-the-foreach-statement-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md
index e97d10a3044..84642b155e8 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-and-run-simple-c-sharp-console-applications/trophy-create-and-run-simple-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647f87dc07d29547b3bee1bf
-title: Trophy - Create and Run Simple C# Console Applications
+title: 'Trophy - Create and Run Simple C# Console Applications'
 challengeType: 18
 dashedName: trophy-create-and-run-simple-c-sharp-console-applications
 msTrophyId: learn.wwl.get-started-c-sharp-part-2.trophy
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-that-return-values.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-that-return-values.md
index d6e5ec2601a..01aaf75c313 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-that-return-values.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-that-return-values.md
@@ -1,6 +1,6 @@
 ---
 id: 647e223c8acb466c97ccbeee
-title: Create C# Methods that Return Values
+title: 'Create C# Methods that Return Values'
 challengeType: 19
 dashedName: create-c-sharp-methods-that-return-values
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-with-parameters.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-with-parameters.md
index 043ae38dbf6..44f48d4b8c9 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-with-parameters.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/create-c-sharp-methods-with-parameters.md
@@ -1,6 +1,6 @@
 ---
 id: 647e224b8acb466c97ccbeef
-title: Create C# Methods with Parameters
+title: 'Create C# Methods with Parameters'
 challengeType: 19
 dashedName: create-c-sharp-methods-with-parameters
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/trophy-create-methods-in-c-sharp-console-applications.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/trophy-create-methods-in-c-sharp-console-applications.md
index 7e8c5c7e33b..850916a4cb2 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/trophy-create-methods-in-c-sharp-console-applications.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/trophy-create-methods-in-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647f877f07d29547b3bee1be
-title: Trophy - Create Methods in C# Console Applications
+title: 'Trophy - Create Methods in C# Console Applications'
 challengeType: 18
 dashedName: trophy-create-methods-in-c-sharp-console-applications
 msTrophyId: learn.wwl.get-started-c-sharp-part-5.trophy
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/write-your-first-c-sharp-method.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/write-your-first-c-sharp-method.md
index 3e41879fc08..7e6313f4a57 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/write-your-first-c-sharp-method.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/create-methods-in-c-sharp-console-applications/write-your-first-c-sharp-method.md
@@ -1,6 +1,6 @@
 ---
 id: 647e226a8acb466c97ccbef1
-title: Write Your First C# Method
+title: 'Write Your First C# Method'
 challengeType: 19
 dashedName: write-your-first-c-sharp-method
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code.md
index 86f2e140a65..afd50edc73e 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code.md
@@ -1,6 +1,6 @@
 ---
 id: 647e22778acb466c97ccbef2
-title: Challenge Project - Debug a C# Console Application Using Visual Studio Code
+title: 'Challenge Project - Debug a C# Console Application Using Visual Studio Code'
 challengeType: 19
 dashedName: challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/create-and-throw-exceptions-in-c-sharp-console-applications.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/create-and-throw-exceptions-in-c-sharp-console-applications.md
index 8e843f9f1a4..82396ebc624 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/create-and-throw-exceptions-in-c-sharp-console-applications.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/create-and-throw-exceptions-in-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647e228a8acb466c97ccbef3
-title: Create and Throw Exceptions in C# Console Applications
+title: 'Create and Throw Exceptions in C# Console Applications'
 challengeType: 19
 dashedName: create-and-throw-exceptions-in-c-sharp-console-applications
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md
index 95f04cb0200..33d1914183f 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code.md
@@ -1,6 +1,6 @@
 ---
 id: 647e22958acb466c97ccbef4
-title: Guided Project - Debug and Handle Exceptions in a C# Console Application Using Visual Studio Code
+title: 'Guided Project - Debug and Handle Exceptions in a C# Console Application Using Visual Studio Code'
 challengeType: 19
 dashedName: guided-project-debug-and-handle-exceptions-in-a-c-sharp-console-application-using-visual-studio-code
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-exception-handling-in-c-sharp-console-applications.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-exception-handling-in-c-sharp-console-applications.md
index db5706b0279..d77786e00f0 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-exception-handling-in-c-sharp-console-applications.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-exception-handling-in-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647e22a08acb466c97ccbef5
-title: Implement Exception Handling in C# Console Applications
+title: 'Implement Exception Handling in C# Console Applications'
 challengeType: 19
 dashedName: implement-exception-handling-in-c-sharp-console-applications
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-the-visual-studio-code-debugging-tools-for-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-the-visual-studio-code-debugging-tools-for-c-sharp.md
index dd6f783eb39..eaf0a57a505 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-the-visual-studio-code-debugging-tools-for-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/implement-the-visual-studio-code-debugging-tools-for-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e22b38acb466c97ccbef6
-title: Implement the Visual Studio Code Debugging Tools for C#
+title: 'Implement the Visual Studio Code Debugging Tools for C#'
 challengeType: 19
 dashedName: implement-the-visual-studio-code-debugging-tools-for-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/trophy-debug-c-sharp-console-applications.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/trophy-debug-c-sharp-console-applications.md
index e8d85f1ea19..261ddfe5c21 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/trophy-debug-c-sharp-console-applications.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/trophy-debug-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647f86ff07d29547b3bee1bd
-title: Trophy - Debug C# Console Applications
+title: 'Trophy - Debug C# Console Applications'
 challengeType: 18
 dashedName: trophy-debug-c-sharp-console-applications
 msTrophyId: learn.wwl.get-started-c-sharp-part-6.trophy
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/foundational-c-sharp-with-microsoft-certification-exam/foundational-c-sharp-with-microsoft-certification-exam.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/foundational-c-sharp-with-microsoft-certification-exam/foundational-c-sharp-with-microsoft-certification-exam.md
index dae16becaac..268034e01cb 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/foundational-c-sharp-with-microsoft-certification-exam/foundational-c-sharp-with-microsoft-certification-exam.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/foundational-c-sharp-with-microsoft-certification-exam/foundational-c-sharp-with-microsoft-certification-exam.md
@@ -1,21 +1,27 @@
 ---
 id: 647e22d18acb466c97ccbef8
-title: Foundational C# with Microsoft Certification Exam
+title: 'Foundational C# with Microsoft Certification Exam'
 challengeType: 17
 dashedName: foundational-c-sharp-with-microsoft-certification-exam
 prerequisites:
-  - id: 647f85d407d29547b3bee1bb
-    title: Trophy - Write Your First Code Using C#
-  - id: 647f87dc07d29547b3bee1bf
-    title: Trophy - Create and Run Simple C# Console Applications
-  - id: 647f882207d29547b3bee1c0
-    title: Trophy - Add Logic to C# Console Applications
-  - id: 647f867a07d29547b3bee1bc
-    title: Trophy - Work with Variable Data in C# Console Applications
-  - id: 647f877f07d29547b3bee1be
-    title: Trophy - Create Methods in C# Console Applications
-  - id: 647f86ff07d29547b3bee1bd
-    title: Trophy - Debug C# Console Applications
+  - 
+    id: 647f85d407d29547b3bee1bb
+    title: 'Trophy - Write Your First Code Using C#'
+  - 
+    id: 647f87dc07d29547b3bee1bf
+    title: 'Trophy - Create and Run Simple C# Console Applications'
+  - 
+    id: 647f882207d29547b3bee1c0
+    title: 'Trophy - Add Logic to C# Console Applications'
+  - 
+    id: 647f867a07d29547b3bee1bc
+    title: 'Trophy - Work with Variable Data in C# Console Applications'
+  - 
+    id: 647f877f07d29547b3bee1be
+    title: 'Trophy - Create Methods in C# Console Applications'
+  - 
+    id: 647f86ff07d29547b3bee1bd
+    title: 'Trophy - Debug C# Console Applications'
 ---
 
 # --description--
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/challenge-project-work-with-variable-data-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/challenge-project-work-with-variable-data-in-c-sharp.md
index 297e00bed50..3283ae458e5 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/challenge-project-work-with-variable-data-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/challenge-project-work-with-variable-data-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e230c8acb466c97ccbef9
-title: Challenge Project - Work with Variable Data in C#
+title: 'Challenge Project - Work with Variable Data in C#'
 challengeType: 19
 dashedName: challenge-project-work-with-variable-data-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/choose-the-correct-data-type-in-your-c-sharp-code.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/choose-the-correct-data-type-in-your-c-sharp-code.md
index d19033039f3..90ad0c24ddc 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/choose-the-correct-data-type-in-your-c-sharp-code.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/choose-the-correct-data-type-in-your-c-sharp-code.md
@@ -1,6 +1,6 @@
 ---
 id: 647e23188acb466c97ccbefa
-title: Choose the Correct Data Type in Your C# Code
+title: 'Choose the Correct Data Type in Your C# Code'
 challengeType: 19
 dashedName: choose-the-correct-data-type-in-your-c-sharp-code
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/convert-data-types-using-casting-and-conversion-techniques-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/convert-data-types-using-casting-and-conversion-techniques-in-c-sharp.md
index 79085b38623..2f81848ec0c 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/convert-data-types-using-casting-and-conversion-techniques-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/convert-data-types-using-casting-and-conversion-techniques-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e23248acb466c97ccbefb
-title: Convert Data Types Using Casting and Conversion Techniques in C#
+title: 'Convert Data Types Using Casting and Conversion Techniques in C#'
 challengeType: 19
 dashedName: convert-data-types-using-casting-and-conversion-techniques-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/format-alphanumeric-data-for-presentation-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/format-alphanumeric-data-for-presentation-in-c-sharp.md
index 070a9e4bee2..4f13971f084 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/format-alphanumeric-data-for-presentation-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/format-alphanumeric-data-for-presentation-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e232c8acb466c97ccbefc
-title: Format Alphanumeric Data for Presentation in C#
+title: 'Format Alphanumeric Data for Presentation in C#'
 challengeType: 19
 dashedName: format-alphanumeric-data-for-presentation-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/guided-project-work-with-variable-data-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/guided-project-work-with-variable-data-in-c-sharp.md
index 732716af58e..d70b33e0034 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/guided-project-work-with-variable-data-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/guided-project-work-with-variable-data-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e23368acb466c97ccbefd
-title: Guided Project - Work with Variable Data in C#
+title: 'Guided Project - Work with Variable Data in C#'
 challengeType: 19
 dashedName: guided-project-work-with-variable-data-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/modify-the-content-of-string-using-built-in-string-data-type-methods-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/modify-the-content-of-string-using-built-in-string-data-type-methods-in-c-sharp.md
index 6a2200fbea0..f3193f3dfc2 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/modify-the-content-of-string-using-built-in-string-data-type-methods-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/modify-the-content-of-string-using-built-in-string-data-type-methods-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e23438acb466c97ccbefe
-title: Modify the Content of Strings Using Built-In String Data Type Methods in C#
+title: 'Modify the Content of Strings Using Built-In String Data Type Methods in C#'
 challengeType: 19
 dashedName: modify-the-content-of-string-using-built-in-string-data-type-methods-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/perform-operations-on-arrays-using-helpers-methods-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/perform-operations-on-arrays-using-helpers-methods-in-c-sharp.md
index 83a75a11440..14353de4a63 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/perform-operations-on-arrays-using-helpers-methods-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/perform-operations-on-arrays-using-helpers-methods-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e23508acb466c97ccbeff
-title: Perform Operations on Arrays Using Helper Methods in C#
+title: 'Perform Operations on Arrays Using Helper Methods in C#'
 challengeType: 19
 dashedName: perform-operations-on-arrays-using-helpers-methods-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/trophy-work-with-variable-data-in-c-sharp-console-applications.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/trophy-work-with-variable-data-in-c-sharp-console-applications.md
index 284bc85973d..59f6dfd85c8 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/trophy-work-with-variable-data-in-c-sharp-console-applications.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/work-with-variable-data-in-c-sharp-console-applications/trophy-work-with-variable-data-in-c-sharp-console-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 647f867a07d29547b3bee1bc
-title: Trophy - Work with Variable Data in C# Console Applications
+title: 'Trophy - Work with Variable Data in C# Console Applications'
 challengeType: 18
 dashedName: trophy-work-with-variable-data-in-c-sharp-console-applications
 msTrophyId: learn.wwl.get-started-c-sharp-part-4.trophy
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-operations-on-numbers-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-operations-on-numbers-in-c-sharp.md
index 48a2eda2b04..71e056d641f 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-operations-on-numbers-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-operations-on-numbers-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e23788acb466c97ccbf02
-title: Perform Basic Operations on Numbers in C#
+title: 'Perform Basic Operations on Numbers in C#'
 challengeType: 19
 dashedName: perform-basic-operations-on-numbers-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-string-formatting-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-string-formatting-in-c-sharp.md
index 620054f7f8a..6a00bd662df 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-string-formatting-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/perform-basic-string-formatting-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e23828acb466c97ccbf03
-title: Perform Basic String Formatting in C#
+title: 'Perform Basic String Formatting in C#'
 challengeType: 19
 dashedName: perform-basic-string-formatting-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/store-and-retrieve-data-using-literal-and-variable-values-in-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/store-and-retrieve-data-using-literal-and-variable-values-in-c-sharp.md
index bb110a59d5e..f229f0d8387 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/store-and-retrieve-data-using-literal-and-variable-values-in-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/store-and-retrieve-data-using-literal-and-variable-values-in-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647e238f8acb466c97ccbf04
-title: Store and Retrieve Data Using Literal and Variable Values in C#
+title: 'Store and Retrieve Data Using Literal and Variable Values in C#'
 challengeType: 19
 dashedName: store-and-retrieve-data-using-literal-and-variable-values-in-c-sharp
 ---
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/trophy-write-your-first-code-using-c-sharp.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/trophy-write-your-first-code-using-c-sharp.md
index d9d0226e8fa..c2cad526381 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/trophy-write-your-first-code-using-c-sharp.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/trophy-write-your-first-code-using-c-sharp.md
@@ -1,6 +1,6 @@
 ---
 id: 647f85d407d29547b3bee1bb
-title: Trophy - Write Your First Code Using C#
+title: 'Trophy - Write Your First Code Using C#'
 challengeType: 18
 dashedName: trophy-write-your-first-code-using-c-sharp
 msTrophyId: learn.wwl.get-started-c-sharp-part-1.trophy
diff --git a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/write-your-first-c-sharp-code.md b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/write-your-first-c-sharp-code.md
index ee9f5a54551..e9da470c2a1 100644
--- a/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/write-your-first-c-sharp-code.md
+++ b/curriculum/challenges/korean/19-foundational-c-sharp-with-microsoft/write-your-first-code-using-c-sharp/write-your-first-c-sharp-code.md
@@ -1,6 +1,6 @@
 ---
 id: 647e239e8acb466c97ccbf05
-title: Write Your First C# Code
+title: 'Write Your First C# Code'
 challengeType: 19
 dashedName: write-your-first-c-sharp-code
 ---
diff --git a/curriculum/challenges/korean/20-upcoming-python/learn-python-by-building-a-blackjack-game/5daa813381b9e3db6c126b43.md b/curriculum/challenges/korean/20-upcoming-python/learn-python-by-building-a-blackjack-game/5daa813381b9e3db6c126b43.md
index 371de561d4b..dc1e0d1e25d 100644
--- a/curriculum/challenges/korean/20-upcoming-python/learn-python-by-building-a-blackjack-game/5daa813381b9e3db6c126b43.md
+++ b/curriculum/challenges/korean/20-upcoming-python/learn-python-by-building-a-blackjack-game/5daa813381b9e3db6c126b43.md
@@ -7,7 +7,7 @@ dashedName: step-1
 
 # --description--
 
-PYTHON 
+PYTHON
 
 Set the `hello` variable to "world". Then print the value.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b05367b59300bcb5f18ef.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b05367b59300bcb5f18ef.md
index 116012c2bff..dcbda886ea4 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b05367b59300bcb5f18ef.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b05367b59300bcb5f18ef.md
@@ -7,15 +7,13 @@ dashedName: task-1
 
 # --description--
 
-In English, you can use the verb `to be` to ask questions about feelings, states, or conditions. 
-When you want to ask such questions, you just swap the positions of the subject (like `you` or `he`) and the verb `to be` (like `are` or `is`). For example, to turn this sentence `You are a developer.` into a question, you switch `you` and `are`:
+In English, you can use the verb `to be` to ask questions about feelings, states, or conditions. When you want to ask such questions, you just swap the positions of the subject (like `you` or `he`) and the verb `to be` (like `are` or `is`). For example, to turn this sentence `You are a developer.` into a question, you switch `you` and `are`:
 
 `Are you a developer?` Notice how the order changes to ask a question.
 
-Here are some more examples of turning statements into questions using `to be`: 
+Here are some more examples of turning statements into questions using `to be`:
 
-`He is here.` -> `Is he here?`
-`They are ready.` -> `Are they ready?`
+`He is here.` -> `Is he here?` `They are ready.` -> `Are they ready?`
 
 # --instructions--
 
@@ -23,7 +21,7 @@ Listen to the audio to complete the sentence below.
 
 # --fillInTheBlank--
 
-## --sentence-- 
+## --sentence--
 
 `Hi, Tom! _ you happy with the workplace so far?`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b130a905a6045ebe03214.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b130a905a6045ebe03214.md
index 34dff94395f..453b8ae4bcc 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b130a905a6045ebe03214.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b130a905a6045ebe03214.md
@@ -27,8 +27,7 @@ Listen to the audio to complete the sentence below.
 
 ### --feedback--
 
-Listen for the word after `team` 
-Think of activities that are meant to improve relationships and cooperation among a group.
+Listen for the word after `team` Think of activities that are meant to improve relationships and cooperation among a group.
 
 # --scene--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b16a8bda80c524e49edd1.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b16a8bda80c524e49edd1.md
index c808e8824a9..353e35b3095 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b16a8bda80c524e49edd1.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b16a8bda80c524e49edd1.md
@@ -9,10 +9,9 @@ dashedName: task-7
 
 # --description--
 
-When you hear a question like `Are they cool?` right after another question or sentence, it's important to use the context to understand what `they` refers to. 
+When you hear a question like `Are they cool?` right after another question or sentence, it's important to use the context to understand what `they` refers to.
 
-In this dialogue, `they` refers to the team-building activities that Tom just mentioned. 
-Understanding the reference requires you to listen to the previous sentence or question. 
+In this dialogue, `they` refers to the team-building activities that Tom just mentioned. Understanding the reference requires you to listen to the previous sentence or question.
 
 Here, `cool` is an informal term that Tom uses to ask if the team-building activities are good, interesting, or enjoyable.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b1803cae7df58348e4e01.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b1803cae7df58348e4e01.md
index 71f2f09bc4d..85c5aa5edbc 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b1803cae7df58348e4e01.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b1803cae7df58348e4e01.md
@@ -9,7 +9,7 @@ dashedName: task-8
 
 # --description--
 
-`Go out with the team` refers to leaving the usual place of work to spend time together, usually for social activities or team bonding. 
+`Go out with the team` refers to leaving the usual place of work to spend time together, usually for social activities or team bonding.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b1ae0c2fb4c64071ade7a.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b1ae0c2fb4c64071ade7a.md
index b27714244b4..c7d7743e407 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b1ae0c2fb4c64071ade7a.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b1ae0c2fb4c64071ade7a.md
@@ -7,9 +7,9 @@ dashedName: task-10
 
 # --description--
 
-When you want to ask about something specific, you can use the question word `what`. `What` is commonly used to talk about things. 
+When you want to ask about something specific, you can use the question word `what`. `What` is commonly used to talk about things.
 
-You usually put `what` at the beginning of a question. Then you follow it with the verb `to be` (like `is` or `are`) or other verbs, and then the subject (like `you` or `the team`). 
+You usually put `what` at the beginning of a question. Then you follow it with the verb `to be` (like `is` or `are`) or other verbs, and then the subject (like `you` or `the team`).
 
 For example: `What is your name?` or `What are they doing?`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b207e8603d076272706b1.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b207e8603d076272706b1.md
index 3e81e8abc16..4c7652a2a14 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b207e8603d076272706b1.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b207e8603d076272706b1.md
@@ -13,7 +13,7 @@ The suffix `-ly` can be added to words to indicate the frequency of an event. He
 
 - `Daily` means it occurs once every day.
 - `Weekly` indicates something that happens once every week.
-- `Monthly` describes something that happens once every month. 
+- `Monthly` describes something that happens once every month.
 - `Yearly` (or annually) describes something that happens once every year.
 
 # --question--
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b23ad0df43588a6eadfa4.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b23ad0df43588a6eadfa4.md
index e40d375337d..d82779721d6 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b23ad0df43588a6eadfa4.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b23ad0df43588a6eadfa4.md
@@ -31,7 +31,7 @@ The first sentence is correct, but the second one does not ask about interest. I
 
 ---
 
-`What is the team’s favorite?` and `Many of us enjoy the monthly game night. `
+`What is the team’s favorite?` and `Many of us enjoy the monthly game night.`
 
 ### --feedback--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b24e5edd7708e93549565.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b24e5edd7708e93549565.md
index acd7a52f379..c2075264630 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b24e5edd7708e93549565.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b24e5edd7708e93549565.md
@@ -12,9 +12,9 @@ Tom: Yes, I've played both before. Great choices. -->
 
 # --description--
 
-The present perfect is a tense used to indicate a link between the present and the past. The time of the action is before now but not specified, and the person using it is usually more interested in the result than in the action itself. For example:
+The present perfect is a tense used to indicate a link between the present and the past. The time of the action is before now but not specified, and the person using it is usually more interested in the result than in the action itself. 예시:
 
-`I played this game yesterday.`  - This is in the simple past tense. It states that the action of playing the game happened at a specific time in the past, which is yesterday. 
+`I played this game yesterday.`  - This is in the simple past tense. It states that the action of playing the game happened at a specific time in the past, which is yesterday.
 
 `I have played this game before.` - This is in the present perfect tense. It states that the action of playing the game happened at an unspecified time in the past.
 
@@ -53,7 +53,7 @@ He doesn't know the games.
 
 ### --feedback--
 
-Tom's response indicates familiarity with the games, not lack of knowledge. 
+Tom's response indicates familiarity with the games, not lack of knowledge.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b316b61644cc96b677e61.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b316b61644cc96b677e61.md
index d463f77edf3..2915e8431bb 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b316b61644cc96b677e61.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b316b61644cc96b677e61.md
@@ -11,7 +11,7 @@ dashedName: task-19
 
 The word `pics` is a short form of `pictures.` When you `take pics,` you are using your camera or cell phone to capture images.
 
-The phrase `lots of` means a large quantity or a large number of something. 
+The phrase `lots of` means a large quantity or a large number of something.
 
 # --instructions--
 
@@ -29,7 +29,7 @@ Listen to the audio to complete the sentence below.
 
 ### --feedback--
 
-Sophie saw Tom doing something with his cell phone related to photography. 
+Sophie saw Tom doing something with his cell phone related to photography.
 
 # --scene--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b69e10d6606a0185d4d4f.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b69e10d6606a0185d4d4f.md
index 64ecafcbb0b..c6cf5f8fa8d 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b69e10d6606a0185d4d4f.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b69e10d6606a0185d4d4f.md
@@ -15,10 +15,9 @@ So far you have learned how to create questions with the verb to be. In sentence
 
 Changing the order of the noun and the verb doesn’t work in every situation. Most sentences need you to add an auxiliary verb to create questions. One of the most common auxiliary verbs is `Do`.
 
-You can use the verb `do` as an auxiliary to most verbs. In the present tense it assumes the form of `do` (I, you, we, they) and `does`(he, she, it). It is like a marker you will add to the beginning of your sentence and lets everyone know that sentence is a question. For example:
+You can use the verb `do` as an auxiliary to most verbs. In the present tense it assumes the form of `do` (I, you, we, they) and `does`(he, she, it). It is like a marker you will add to the beginning of your sentence and lets everyone know that sentence is a question. 예:
 
-Statement: `You debug on Fridays.`
-Question: `Do you debug on Fridays?`
+Statement: `You debug on Fridays.` Question: `Do you debug on Fridays?`
 
 # --instructions--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b6ea501ca10ae78922b0d.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b6ea501ca10ae78922b0d.md
index bb8958a990d..a62529376fa 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b6ea501ca10ae78922b0d.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b6ea501ca10ae78922b0d.md
@@ -9,7 +9,7 @@ dashedName: task-24
 
 Now that you know how to use `do` to form questions about hobbies, let's use `do` to ask about daily routines. This is useful for finding out about someone's everyday activities, which is a common topic of small talk.
 
-Note: When you use `do` as an auxiliary verb in a question, the main verb must stay in its base form. For example:
+Note: When you use `do` as an auxiliary verb in a question, the main verb must stay in its base form. 예시:
 
 Statement: `She works as a Full Stack dev.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b6f641e5c3ab1afc6efc1.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b6f641e5c3ab1afc6efc1.md
index 49d570a03c2..37f6db44088 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b6f641e5c3ab1afc6efc1.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b6f641e5c3ab1afc6efc1.md
@@ -13,7 +13,7 @@ Before you learned to ask questions using `do,` you can also use the auxiliary v
 
 `It does not function` - (Subject + does + not + main verb)
 
-Often, to be more practical it is common to abbreviate `do not` and `does not` to `don’t` and `doesn’t`. 
+Often, to be more practical it is common to abbreviate `do not` and `does not` to `don’t` and `doesn’t`.
 
 Just like with questions, when you use `don't,` the main verb that comes after it will always be in its base form, no matter who you're talking about. Remember, you use `don't` with I, you, we, and they. When you talk about he, she, or it, you will use `doesn't,` but more on that later. Right now, let's focus on using `don't.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b70cc934e0ab83cab4dbe.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b70cc934e0ab83cab4dbe.md
index f5dc9d24ada..729fb614d92 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b70cc934e0ab83cab4dbe.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b70cc934e0ab83cab4dbe.md
@@ -7,11 +7,9 @@ dashedName: task-27
 
 # --description--
 
-So far, you've exercised how to ask questions with `do` and make negative sentences with `don't.`
-Let's review them. Remember:
+So far, you've exercised how to ask questions with `do` and make negative sentences with `don't.` Let's review them. Remember:
 
-Affirmative: `I do work on weekends.` (means the person works on weekends)
-Negative: `I don't work on weekends.` (means the person does not work on weekends)
+Affirmative: `I do work on weekends.` (means the person works on weekends) Negative: `I don't work on weekends.` (means the person does not work on weekends)
 
 # --instructions--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b718282cd56bb91a795de.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b718282cd56bb91a795de.md
index fc749baf868..4353556811a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b718282cd56bb91a795de.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657b718282cd56bb91a795de.md
@@ -9,11 +9,11 @@ dashedName: task-28
 
 # --description--
 
-In English, some verbs are conjugated. This means they change the form according to the person you are talking about. For most verbs, when we talk about another person like `he,` `she,` or `it,` we add an `-s` or `-es` to the verb. 
+In English, some verbs are conjugated. This means they change the form according to the person you are talking about. For most verbs, when we talk about another person like `he,` `she,` or `it,` we add an `-s` or `-es` to the verb.
 
 For example: If you talk about Tom and photography you can say: `Tom takes photographs,` not `Tom take photographs.` This is how you show in your sentence that the action is done by Tom in the present tense.
 
-For negative sentences, you can use `doesn't` followed by the base form of the verb. 
+For negative sentences, you can use `doesn't` followed by the base form of the verb.
 
 You do not add `-s` or `-es.` because `does` is already conjugated (`do+es`).
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb542baf74594933c7ac9.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb542baf74594933c7ac9.md
index d0018ff5f14..7d44c4dfccc 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb542baf74594933c7ac9.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb542baf74594933c7ac9.md
@@ -9,7 +9,7 @@ dashedName: task-41
 
 When you are curious about someone's physical appearance, such as their hair color, height, or general appearance, you could use the sentence `What does (he/she) look like?`
 
-For example: If you hear that a new programmer joined your team but you haven't met them, you can ask your colleague, `What does (he/she) look like?` 
+For example: If you hear that a new programmer joined your team but you haven't met them, you can ask your colleague, `What does (he/she) look like?`
 
 You want to know if they are tall, have short hair, or wear glasses, so you can recognize them in the office.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb5dd956a8797462da793.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb5dd956a8797462da793.md
index fd6093f0f1e..7f41d8862c5 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb5dd956a8797462da793.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb5dd956a8797462da793.md
@@ -9,9 +9,9 @@ dashedName: task-42
 
 When you want to know about someone's character or personality, you can ask, `What is (he/she) like?`. This question is about the qualities of a person, not about their physical appearance. Example:
 
-Imagine you meet a new student in your programming class and you want to know more about her. 
+Imagine you meet a new student in your programming class and you want to know more about her.
 
-You can ask a classmate, `What is she like?` 
+You can ask a classmate, `What is she like?`
 
 You are not asking if the new student likes computers or games; you are asking about her personality. Maybe she's friendly, smart, or really good at coding.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb68bf15f349a744b5fba.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb68bf15f349a744b5fba.md
index 6620689288d..5c650077d4d 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb68bf15f349a744b5fba.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb68bf15f349a744b5fba.md
@@ -11,7 +11,7 @@ When you want to learn about a person’s character or personality without speci
 
 This is a respectful and inclusive way to ask about someone. Using `they` in this way ensures that you don't make assumptions about people. Example:
 
-Imagine there is a new team member joining your programming project, but you haven’t met them yet. Instead of assuming their gender, you can ask your supervisor, `What are they like?` 
+Imagine there is a new team member joining your programming project, but you haven’t met them yet. Instead of assuming their gender, you can ask your supervisor, `What are they like?`
 
 This question helps you find out about the new member's personality, such as being organized, creative, or detail-oriented.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb91ed0a08ea3761c7407.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb91ed0a08ea3761c7407.md
index a249d59d151..1ba9f30407f 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb91ed0a08ea3761c7407.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cb91ed0a08ea3761c7407.md
@@ -9,7 +9,7 @@ dashedName: task-44
 
 # --description--
 
-In English, you ask two different questions when you want to know about someone's personality and someone's physical appearance. `What is he/she like?` is used to ask about personality traits, such as being kind, intelligent, or funny. 
+In English, you ask two different questions when you want to know about someone's personality and someone's physical appearance. `What is he/she like?` is used to ask about personality traits, such as being kind, intelligent, or funny.
 
 On the other hand, `What does he/she look like?` is the question you would ask if you want to know about how someone looks, for example, if they are tall, have blonde hair, or wear glasses.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cbccfa92918b1037dbf60.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cbccfa92918b1037dbf60.md
index 778c83d9594..0307b0fda75 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cbccfa92918b1037dbf60.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cbccfa92918b1037dbf60.md
@@ -9,7 +9,7 @@ dashedName: task-47
 
 # --description--
 
-The word `passion` is a big feeling of love for something. When you have a passion for something, you really enjoy it and think it's very important. 
+The word `passion` is a big feeling of love for something. When you have a passion for something, you really enjoy it and think it's very important.
 
 If someone has a passion for music, it means they love music a lot. In the conversation, Sophie talks about Maria's passion for something.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cbdc0c360a3b53767d73f.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cbdc0c360a3b53767d73f.md
index 733ecd8382c..35a0a6f67f1 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cbdc0c360a3b53767d73f.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cbdc0c360a3b53767d73f.md
@@ -7,7 +7,7 @@ dashedName: task-48
 
 # --description--
 
-`Leading a team` means being in charge of a group of people and guiding them to achieve their goals. It's like being the captain of a ship. 
+`Leading a team` means being in charge of a group of people and guiding them to achieve their goals. It's like being the captain of a ship.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cc1a2ced22ac3e7d57fd3.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cc1a2ced22ac3e7d57fd3.md
index bbaa818966a..dfdf589221a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cc1a2ced22ac3e7d57fd3.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cc1a2ced22ac3e7d57fd3.md
@@ -9,7 +9,7 @@ dashedName: task-50
 
 # --description--
 
-Imagine you're pointing to something that is not right next to you but a little far away; you use `those`. If something is very close to you, like the book in your hands, you use `these`. 
+Imagine you're pointing to something that is not right next to you but a little far away; you use `those`. If something is very close to you, like the book in your hands, you use `these`.
 
 In the dialogue, Tom says `Those are great traits...` because he's talking about the traits Sophie mentioned just a moment ago. He's not talking about traits that are being shown to him right this second.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cd143f74299f36a624c7a.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cd143f74299f36a624c7a.md
index 4ad8cd86970..a0748c9d6f6 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cd143f74299f36a624c7a.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cd143f74299f36a624c7a.md
@@ -7,11 +7,11 @@ dashedName: task-53
 
 # --description--
 
-You learned that `do` is an auxiliary verb that helps ask questions. You have also learned that when you want to ask about something specific, you can use the question word `what.` 
+You learned that `do` is an auxiliary verb that helps ask questions. You have also learned that when you want to ask about something specific, you can use the question word `what.`
 
 When you want to ask about someone's job or role, you use `what` with `do` to form a question.
 
-For example, you ask `What do you do?` to mean `What is your job?` 
+For example, you ask `What do you do?` to mean `What is your job?`
 
 When talking about another person like Maria, you say `What does she do?` because `she` is a third person singular (she, he, it), and with these subjects, `do` changes to `does`.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cd1925ac059f5034286c3.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cd1925ac059f5034286c3.md
index b1f60613112..80077ce71fe 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cd1925ac059f5034286c3.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cd1925ac059f5034286c3.md
@@ -7,7 +7,7 @@ dashedName: task-54
 
 # --description--
 
-Using the auxiliary verb `do` can be tricky when the main verb in the sentence is also `do`. 
+Using the auxiliary verb `do` can be tricky when the main verb in the sentence is also `do`.
 
 But remember, `do` helps in asking questions, and when it's about someone else, like he or she, it changes to `does`. The question `What does she/he do?` is asking for information about a person's job.
 
@@ -23,7 +23,7 @@ Which question is correct for asking about a person's job?
 
 ### --feedback--
 
-The structure `do she does` is not correct in English. When asking a question about another person, you use `does` only once. 
+The structure `do she does` is not correct in English. When asking a question about another person, you use `does` only once.
 
 ---
 
@@ -31,7 +31,7 @@ The structure `do she does` is not correct in English. When asking a question ab
 
 ### --feedback--
 
-You don't need to use `does` twice. 
+You don't need to use `does` twice.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cd962b45f48127c183d7b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cd962b45f48127c183d7b.md
index 5e6c7de9ff9..8f77f9821ab 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cd962b45f48127c183d7b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cd962b45f48127c183d7b.md
@@ -7,14 +7,13 @@ dashedName: task-56
 
 # --description--
 
-When you speak about what another person does every day, like your friend or a teacher, and you use `he,` `she,` or `it` you will often need to conjugate the verb of your sentence. 
+When you speak about what another person does every day, like your friend or a teacher, and you use `he,` `she,` or `it` you will often need to conjugate the verb of your sentence.
 
 As you already studied, For most verbs conjugation can be simple. You just  add `s` or `es` to the end of the verb.
 
-For example:
+예시:
 
-`You talk` -> `He talks`
-`They do` -> `It does`
+`You talk` -> `He talks` `They do` -> `It does`
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cdaeee8cc4517f84911a2.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cdaeee8cc4517f84911a2.md
index 230cb7562d7..fd7b3726300 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cdaeee8cc4517f84911a2.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cdaeee8cc4517f84911a2.md
@@ -33,7 +33,7 @@ Fill in the blanks with the correct verbs based on their meanings.
 
 ### --feedback--
 
-Think about what a leader must do when they have several tasks that need to be done by different people. This verb refers to a third person, consider conjugating it. 
+Think about what a leader must do when they have several tasks that need to be done by different people. This verb refers to a third person, consider conjugating it.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cdc5a8e30191d1abec8b7.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cdc5a8e30191d1abec8b7.md
index a801dfd95f0..c9d76a20d33 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cdc5a8e30191d1abec8b7.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cdc5a8e30191d1abec8b7.md
@@ -9,7 +9,7 @@ dashedName: task-58
 
 # --description--
 
-Let’s practice listening to verbs conjugated in the third person. 
+Let’s practice listening to verbs conjugated in the third person.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ce0bbf16c312c8dcc8dff.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ce0bbf16c312c8dcc8dff.md
index e311843f93c..c299eba6131 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ce0bbf16c312c8dcc8dff.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ce0bbf16c312c8dcc8dff.md
@@ -11,11 +11,9 @@ There are some words you can use in your sentence to express how often something
 
 `Usually` is a word that suggests that something happens more often than not but is not constant.
 
-When `usually` is used with the verb `to be,` it is placed after the verb. 
-`She is usually on time for meetings.`
+When `usually` is used with the verb `to be,` it is placed after the verb. `She is usually on time for meetings.`
 
-With other verbs, `usually` comes before the main verb, for example: 
-`He usually works late.`
+With other verbs, `usually` comes before the main verb, for example: `He usually works late.`
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ceafb64fd6a5076b32c8b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ceafb64fd6a5076b32c8b.md
index 2c813590543..e9f1c4eb172 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ceafb64fd6a5076b32c8b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ceafb64fd6a5076b32c8b.md
@@ -7,7 +7,7 @@ dashedName: task-66
 
 # --description--
 
-When you use the verb `hold` in the context of meetings, it means to have or conduct a meeting. Like saying, `Our school holds an assembly every Friday.` It means this school has assemblies every Friday. 
+When you use the verb `hold` in the context of meetings, it means to have or conduct a meeting. Like saying, `Our school holds an assembly every Friday.` It means this school has assemblies every Friday.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cfddfaca4b58b1279aaf9.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cfddfaca4b58b1279aaf9.md
index a27322ca033..4b4cf9271c7 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cfddfaca4b58b1279aaf9.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cfddfaca4b58b1279aaf9.md
@@ -27,7 +27,7 @@ Listen to the audio to complete the sentence below.
 
 ### --feedback--
 
-Remember to conjugate the verb. The verb you need is about motivating or inspiring someone to do something. It's similar to cheering someone on. 
+Remember to conjugate the verb. The verb you need is about motivating or inspiring someone to do something. It's similar to cheering someone on.
 
 # --scene--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cfeeeabb34d946d437dc7.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cfeeeabb34d946d437dc7.md
index 9d0f1ef6a97..47282b1ff66 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cfeeeabb34d946d437dc7.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657cfeeeabb34d946d437dc7.md
@@ -9,7 +9,7 @@ dashedName: task-75
 
 # --description--
 
-The expression `to be in good hands` means that someone is being taken care of by a competent or capable person. 
+The expression `to be in good hands` means that someone is being taken care of by a competent or capable person.
 
 It’s like saying you can relax because you trust the person helping or looking after you.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dbd1ebf21b2096966fe0d.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dbd1ebf21b2096966fe0d.md
index 31122cf4b02..fb91f744c13 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dbd1ebf21b2096966fe0d.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dbd1ebf21b2096966fe0d.md
@@ -7,7 +7,7 @@ dashedName: task-77
 
 # --description--
 
-Remember, the auxiliary verb `do` is used to form questions in the present simple tense. 
+Remember, the auxiliary verb `do` is used to form questions in the present simple tense.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc06c17779b1c77b8fccf.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc06c17779b1c77b8fccf.md
index dfc9b98566a..ee3dbbaddbe 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc06c17779b1c77b8fccf.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc06c17779b1c77b8fccf.md
@@ -9,7 +9,7 @@ dashedName: task-83
 
 # --description--
 
-The word `everyone` is used to refer to all people in a group. The opposite of `everyone` is `no one` and `nobody` 
+The word `everyone` is used to refer to all people in a group. The opposite of `everyone` is `no one` and `nobody`
 
 `No one` and `nobody` both mean not a single person.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc0e16fb76f1f02a0c02a.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc0e16fb76f1f02a0c02a.md
index f605e1b17ec..adf89540fc3 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc0e16fb76f1f02a0c02a.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc0e16fb76f1f02a0c02a.md
@@ -9,7 +9,7 @@ dashedName: task-84
 
 An `update` is new information or the latest news about something. When you `update` someone, you are giving them the most recent information.
 
-The phrase `updates on project progress` means giving new information about the present projects. 
+The phrase `updates on project progress` means giving new information about the present projects.
 
 The preposition `on` in this context links the updates to the specific subject they are about - the project progress.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc50830f9be380105f1ee.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc50830f9be380105f1ee.md
index 12801a8f0bc..3016f4e75a4 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc50830f9be380105f1ee.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc50830f9be380105f1ee.md
@@ -7,7 +7,7 @@ dashedName: task-94
 
 # --description--
 
-In English, the verb `know` is conjugated to `knows` when the subject is singular and in third person. 
+In English, the verb `know` is conjugated to `knows` when the subject is singular and in third person.
 
 `Everyone` refers to a group but it is treated as a singular noun, that’s why in English the correct form is `everyone knows`.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc6a58ec0be432655eaf5.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc6a58ec0be432655eaf5.md
index 976081104a1..e2755f7348e 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc6a58ec0be432655eaf5.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc6a58ec0be432655eaf5.md
@@ -12,7 +12,7 @@ Sophie: Sometimes, but we normally discuss tasks and responsibilities for the we
 
 In English, words like `sometimes,` `always,` and `never` are used to describe the frequency of an action.
 
-`Sometimes` is used when an action happens on certain occasions but not every time. For example, `I sometimes have coffee for breakfast.` It indicates possibility but not certainty. 
+`Sometimes` is used when an action happens on certain occasions but not every time. For example, `I sometimes have coffee for breakfast.` It indicates possibility but not certainty.
 
 `Always` is used when an action happens every single time without fail. For instance, `The sun always rises in the east.` It shows a consistent or habitual action.
 
@@ -20,8 +20,7 @@ In English, words like `sometimes,` `always,` and `never` are used to describe t
 
 # --instructions--
 
-Listen to the audio, understand the context and complete this sentence with the
-correct adverb of frequency.
+Listen to the audio, understand the context and complete this sentence with the correct adverb of frequency.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc9946a177a5938ad3854.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc9946a177a5938ad3854.md
index e3746ac8f5b..224ccf6112d 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc9946a177a5938ad3854.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dc9946a177a5938ad3854.md
@@ -11,10 +11,9 @@ dashedName: task-104
 
 `It depends on` is used to say that the answer to a question can change based on different things. For example:
 
-How long it takes to make a website depends on how big or small the job is.
-Choosing the coding language depends on the computer or system we use.
+How long it takes to make a website depends on how big or small the job is. Choosing the coding language depends on the computer or system we use.
 
-Notice that after `depends` there’s always the preposition `on`. 
+Notice that after `depends` there’s always the preposition `on`.
 
 # --instructions--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dce8ff35869721311a5e3.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dce8ff35869721311a5e3.md
index a92f943d83c..544d8f1988c 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dce8ff35869721311a5e3.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dce8ff35869721311a5e3.md
@@ -21,7 +21,7 @@ Which sentence is correct for describing one place near you?
 
 ### --feedback--
 
-`There are` is used for plural nouns, and `bank` is singular. You’ll learn about there are in the next few lessons. 
+`There are` is used for plural nouns, and `bank` is singular. You’ll learn about there are in the next few lessons.
 
 ---
 
@@ -29,7 +29,7 @@ Which sentence is correct for describing one place near you?
 
 ### --feedback--
 
-This option is a question form, not a statement. You’ll learn about questions later. 
+This option is a question form, not a statement. You’ll learn about questions later.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dcf46fdf3f37766568bed.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dcf46fdf3f37766568bed.md
index 3e4712fd0a4..0c06b0e6dc6 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dcf46fdf3f37766568bed.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dcf46fdf3f37766568bed.md
@@ -9,7 +9,7 @@ dashedName: task-113
 
 `There are` is used when talking about the existence of multiple things or places in a particular location.
 
-For example: `There are many programming languages in the market`. 
+For example: `There are many programming languages in the market`.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dd4012bce1081c8d8c934.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dd4012bce1081c8d8c934.md
index 11486b224dc..ba4479f33df 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dd4012bce1081c8d8c934.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dd4012bce1081c8d8c934.md
@@ -11,9 +11,9 @@ dashedName: task-117
 
 The word `any` is often used in questions to ask if something exists or is available, without specifying a quantity. It's useful when you don't know if there is something or how much there is and you want to find out.
 
-For example: `Are there any updates?` 
+For example: `Are there any updates?`
 
-The word `any` is used to ask if there are updates without specifying a number. 
+The word `any` is used to ask if there are updates without specifying a number.
 
 `Any` is often used in questions and negative statements to mean `some` or `even a little.` Here's how you might use it in different contexts:
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dd74fb90e759a783f4b9a.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dd74fb90e759a783f4b9a.md
index 80c29c5381b..131886480c4 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dd74fb90e759a783f4b9a.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657dd74fb90e759a783f4b9a.md
@@ -25,7 +25,7 @@ When Tom asks about places for reading and watching performances, he uses the pl
 
 ### --feedback--
 
-The first word is related to places that sell books. 
+The first word is related to places that sell books.
 
 ---
 
@@ -33,7 +33,7 @@ The first word is related to places that sell books.
 
 ### --feedback--
 
-The second word is about a place where you can watch movies. 
+The second word is about a place where you can watch movies.
 
 # --scene--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ddcd61f516cacdc7a04ca.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ddcd61f516cacdc7a04ca.md
index c88beac8099..d9cde6b6807 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ddcd61f516cacdc7a04ca.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ddcd61f516cacdc7a04ca.md
@@ -56,29 +56,9 @@ Rentals are usually stationary services, not something that stops.
 # --scene--
 
 ```json
-{
-  "setup": {
-    "background": "company2-center.png",
-    "characters": [
-      {
-        "character": "Maria",
-        "position": {"x":50,"y":0,"z":1.5},
-        "opacity": 0
-      }
-    ],
-    "audio": {
-      "filename": "1.3-5.mp3",
-      "startTime": 1,
-      "startTimestamp": 37.92,
-      "finishTimestamp": 42.38
-    }
-  },
-  "commands": [
-    {
-      "character": "Maria",
-      "opacity": 1,
-      "startTime": 0
-    },
+{ "setup": { "background": "company2-center.png", "characters": [
+      { "character": "Maria", "position": {"x":50,"y":0,"z":1.5}, "opacity": 0 } ], "audio": { "filename": "1.3-5.mp3", "startTime": 1, "startTimestamp": 37.92, "finishTimestamp": 42.38 } }, "commands": [
+    { "character": "Maria", "opacity": 1, "startTime": 0 },
     {
       "character": "Maria",
       "startTime": 1,
@@ -93,5 +73,4 @@ Rentals are usually stationary services, not something that stops.
       "opacity": 0,
       "startTime": 5.96
     }
-  ]
-}
+  ] }
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ddd7d4fc512b03741d9a3.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ddd7d4fc512b03741d9a3.md
index c9d3142d8a6..1ef935b8aeb 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ddd7d4fc512b03741d9a3.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-conversation-starters-in-the-break-room/657ddd7d4fc512b03741d9a3.md
@@ -7,7 +7,7 @@ dashedName: task-125
 
 # --description--
 
-`Shopping malls` are large buildings with lots of different stores, and they're common in cities. 
+`Shopping malls` are large buildings with lots of different stores, and they're common in cities.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/651dd5296ffb500e3f2ce479.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/651dd5296ffb500e3f2ce479.md
index 149d209bc6c..ec6d6173538 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/651dd5296ffb500e3f2ce479.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/651dd5296ffb500e3f2ce479.md
@@ -12,7 +12,7 @@ Maria: Hello! You're the new graphic designer, right?
 
 # --description--
 
-In English, contractions are commonly used to make speech sound more natural and fluent. `You're` is a contraction of `you are`. 
+In English, contractions are commonly used to make speech sound more natural and fluent. `You're` is a contraction of `you are`.
 
 This contraction is a combination of the pronoun `you` and the verb `are`, which is part of the verb `to be`. `Are` is used here in the present affirmative to make a statement or ask a question. This is a typical way to confirm someone's role or identity in English.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/6568c68b92a63810a57cffaf.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/6568c68b92a63810a57cffaf.md
index eaeba1fe56e..c4a5eb8e2c9 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/6568c68b92a63810a57cffaf.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/6568c68b92a63810a57cffaf.md
@@ -11,7 +11,7 @@ Tom: I like it. It's different from Texas, but I like it here.
 -->
 
 # --description--
-Instead of saying `California is different from Texas`, Tom says: `It's different from Texas`. Tom uses `It's` as a contraction of `It` and `is`. In this context, `It` refers to `California`. 
+Instead of saying `California is different from Texas`, Tom says: `It's different from Texas`. Tom uses `It's` as a contraction of `It` and `is`. In this context, `It` refers to `California`.
 
 When talking about places or things, especially when comparing or describing them, `it's` serves as a subject and verb starter for the sentence.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656a417f7f9daf2e9aae6831.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656a417f7f9daf2e9aae6831.md
index 5b08274e295..fc56b6de371 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656a417f7f9daf2e9aae6831.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656a417f7f9daf2e9aae6831.md
@@ -14,9 +14,7 @@ Sophie: Oh, hi Tom! I'm Sophie. I'm a developer. Where are you from, Tom?
 
 Identify how articles change the context of a sentence. Articles, like `the` and `a`, can change the meaning of a sentence. `The` talks about something specific. `A` talks about something in general.
 
-For Example:
-`Tom is a graphic designer in our company` means there are many graphic designers and Tom is one of them.
-`Tom is the graphic designer of our company` means there is only one person in the company matching this description (that's Tom).
+For Example: `Tom is a graphic designer in our company` means there are many graphic designers and Tom is one of them. `Tom is the graphic designer of our company` means there is only one person in the company matching this description (that's Tom).
 
 Notice that, after `graphic designer`, there are details that made the situation more specific. In this company, there's only one person that could fit the profile - Tom.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656a58b31bc9f233debc2bc9.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656a58b31bc9f233debc2bc9.md
index 4c6672d4b53..018695ba3c2 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656a58b31bc9f233debc2bc9.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656a58b31bc9f233debc2bc9.md
@@ -12,8 +12,7 @@ Sophie: But hey, your desk is just like my desk. You are in luck.
 
 # --description--
 
-Certain expressions in English convey meanings that are not immediately clear from the individual words. `You're in luck` is one such expression.
-It expresses that someone is fortunate or has good luck in a situation. Sophie uses such a phrase when talking to Tom.
+Certain expressions in English convey meanings that are not immediately clear from the individual words. `You're in luck` is one such expression. It expresses that someone is fortunate or has good luck in a situation. Sophie uses such a phrase when talking to Tom.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656caf2085b7ab04ff9a6b3f.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656caf2085b7ab04ff9a6b3f.md
index e6d61a5bc8d..eed23dde3d1 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656caf2085b7ab04ff9a6b3f.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656caf2085b7ab04ff9a6b3f.md
@@ -12,7 +12,7 @@ Tom: This is so cool. A Standing Desk, an ergonomic chair and an ergonomic mouse
 
 # --description--
 
-The articles `a` and `an` are both used to indicate a singular, non-specific noun. The choice between them depends on the sound that follows. If the next word begins with a consonant sound, we use `a`. If it starts with a vowel sound, we use `an`. For example:
+The articles `a` and `an` are both used to indicate a singular, non-specific noun. The choice between them depends on the sound that follows. If the next word begins with a consonant sound, we use `a`. If it starts with a vowel sound, we use `an`. 예시:
 
 `Quincy is a teacher at freeCodeCamp.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cb18802ef22057a58db13.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cb18802ef22057a58db13.md
index 14e3a9e8c83..140e2ca067a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cb18802ef22057a58db13.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cb18802ef22057a58db13.md
@@ -7,12 +7,12 @@ dashedName: task-87
 
 # --description--
 
-In English, we use names to directly refer to specific people. See this example: 
+In English, we use names to directly refer to specific people. See this example:
 
 `Hello! You're Amy, correct?`
 
 In English, names directly refer to specific people. Saying `Amy` identifies a particular person with that name. Using `the` or `an` before a name, like `the Amy` or `an Amy`, sounds unusual because names are already unique and specific.
- 
+
 Think of names as unique labels for people. So, you don't need `a`, `an`, or `the` before a person's name. Just use the name by itself!
 
 # --instructions--
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cc5d403162710a3fae634.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cc5d403162710a3fae634.md
index 899d9fd5568..119be399d78 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cc5d403162710a3fae634.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cc5d403162710a3fae634.md
@@ -14,8 +14,7 @@ Tom: Wow, I'm so hungry. Is it lunch time?
 
 If a person asks you a direct question using `is it`. For example: `Is it true?` You can reply to this question with these short answers:
 
-`Yes, it is.` For affirmative. 
-`No, it is not` or `No, it isn't`. For negative.
+`Yes, it is.` For affirmative. `No, it is not` or `No, it isn't`. For negative.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656ccd8bafe46d138451d176.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656ccd8bafe46d138451d176.md
index 07a60215362..472b5f62220 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656ccd8bafe46d138451d176.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656ccd8bafe46d138451d176.md
@@ -27,7 +27,7 @@ A `favorite lunch spot` refers to a preferred place where someone likes to have
 
 ### --feedback--
 
-Listen to how Tom asks Sophie about a place she prefers to eat lunch. 
+Listen to how Tom asks Sophie about a place she prefers to eat lunch.
 
 ---
 
@@ -35,7 +35,7 @@ Listen to how Tom asks Sophie about a place she prefers to eat lunch.
 
 ### --feedback--
 
-Listen to how Tom asks Sophie about a place she prefers to eat lunch. 
+Listen to how Tom asks Sophie about a place she prefers to eat lunch.
 
 ---
 
@@ -43,7 +43,7 @@ Listen to how Tom asks Sophie about a place she prefers to eat lunch.
 
 ### --feedback--
 
-Listen to how Tom asks Sophie about a place she prefers to eat lunch. 
+Listen to how Tom asks Sophie about a place she prefers to eat lunch.
 
 # --scene--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cd31045ce74162adef6c7.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cd31045ce74162adef6c7.md
index d3ac70e2f49..6b51defe691 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cd31045ce74162adef6c7.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cd31045ce74162adef6c7.md
@@ -10,7 +10,7 @@ AUDIO REFERENCE:
 Play entire dialogue
 -->
 
-# --description-- 
+# --description--
 
 This is the last task for this dialogue. Listen to the whole conversation again and answer the question below.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cd52f0f43551be96b4640.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cd52f0f43551be96b4640.md
index e2a267cfc59..d26573301ed 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cd52f0f43551be96b4640.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656cd52f0f43551be96b4640.md
@@ -21,7 +21,7 @@ Tell me where that person is.
 
 ### --feedback--
 
-The phrase is not about asking for someone's location. Try again. 
+The phrase is not about asking for someone's location. Try again.
 
 ---
 
@@ -29,7 +29,7 @@ I see that person.
 
 ### --feedback--
 
-This is partially correct. There is something more. Try again. 
+This is partially correct. There is something more. Try again.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d26bc907ce0123546288a.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d26bc907ce0123546288a.md
index 55c105c827b..0a092e0bd58 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d26bc907ce0123546288a.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d26bc907ce0123546288a.md
@@ -26,7 +26,7 @@ The phrase `I'm here to` normally talks about purpose or intention. Jake uses th
 
 ### --feedback--
 
-Focus on why Jake is there. 
+Focus on why Jake is there.
 
 # --scene--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d2914e7cfc312ea00c864.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d2914e7cfc312ea00c864.md
index e324ab6c47a..9c938d81ff6 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d2914e7cfc312ea00c864.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d2914e7cfc312ea00c864.md
@@ -13,10 +13,9 @@ Jake: No, it isn't. It's the good-old swipe at the door.
 
 # --description--
 
-Jake provides an answer using `it isn't`, which is a contraction of `it is not`. It's a way to negate or say `no` to a statement or question. Contractions are a way to combine words for more fluid speech. For example:
+Jake provides an answer using `it isn't`, which is a contraction of `it is not`. It's a way to negate or say `no` to a statement or question. Contractions are a way to combine words for more fluid speech. 예시:
 
-`Is the software updated?`
-`No, it isn't (it is not) updated.`
+`Is the software updated?` `No, it isn't (it is not) updated.`
 
 Jake also uses `it's`, the contraction for `it is`, when talking about the swipe card system. Let's see how well you understand these in the context of the dialogue.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d2d19c570e2146b5e8835.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d2d19c570e2146b5e8835.md
index 8e09794698c..5bc6b882eba 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d2d19c570e2146b5e8835.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d2d19c570e2146b5e8835.md
@@ -12,7 +12,7 @@ Jake: Well, it's five o'clock. I guess this is it for your first day. How was it
 
 # --description--
 
-Sometimes, people use phrases to ask about experiences, feelings, or opinions. `How was it?` is a general way to ask about something that just happened. 
+Sometimes, people use phrases to ask about experiences, feelings, or opinions. `How was it?` is a general way to ask about something that just happened.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d2f31f23860155477ca7b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d2f31f23860155477ca7b.md
index c2d20420f42..649b0345c5d 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d2f31f23860155477ca7b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/656d2f31f23860155477ca7b.md
@@ -13,7 +13,7 @@ Jake: Bye, Sarah. Have a great evening. See you!
 
 # --description--
 
-`Have a great evening` is a kind expression wishing someone a pleasant time for the rest of the day, specifically the evening. 
+`Have a great evening` is a kind expression wishing someone a pleasant time for the rest of the day, specifically the evening.
 
 `Evening` is the time of day after afternoon and before night. When someone says `Have a great evening`, they hope you have a good time during that part of the day.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
index fa5b427fdc5..857d52d4c51 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
@@ -1,5 +1,5 @@
 ---
-id: 657e0d0037192f3d9e3d5417 
+id: 657e0d0037192f3d9e3d5417
 title: Task 128
 challengeType: 22
 dashedName: task-128
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b106ced8c653be6b3218f.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b106ced8c653be6b3218f.md
index 301a777a900..db55cf9f51a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b106ced8c653be6b3218f.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b106ced8c653be6b3218f.md
@@ -29,7 +29,7 @@ Listen to the audio and complete the sentence.
 
 ### --feedback--
 
-This word is used to ask if someone is able to do something. 
+This word is used to ask if someone is able to do something.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b108cf870283d22b21e8e.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b108cf870283d22b21e8e.md
index ad5202d23d2..e281ff8d3cb 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b108cf870283d22b21e8e.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b108cf870283d22b21e8e.md
@@ -13,7 +13,7 @@ Candidate: Good afternoon! Sure, I was a programmer at Acme Tech.
 
 # --description--
 
-In English, the simple present tense is used to describe habitual or usual actions. However, when you are talking about past roles or experiences, like in an interview, you should use the simple past tense. 
+In English, the simple present tense is used to describe habitual or usual actions. However, when you are talking about past roles or experiences, like in an interview, you should use the simple past tense.
 
 The simple past tense often involves changing verbs. For example, `is` becomes `was` for singular subjects and `are` becomes `were` for plural subjects.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b11f87368cf463ea4fe46.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b11f87368cf463ea4fe46.md
index 67343b31705..8641c5dce9a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b11f87368cf463ea4fe46.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b11f87368cf463ea4fe46.md
@@ -13,10 +13,9 @@ Anna: That's excellent. Were there any specific projects you'd like to mention?
 
 # --description--
 
-Questions in the past tense with the verb `to be` are very similar to how you do it in the present tense. The only difference is that you need to remember to conjugate the verb to `were` or `was`, followed by the subject and then the main verb. For example:
+Questions in the past tense with the verb `to be` are very similar to how you do it in the present tense. The only difference is that you need to remember to conjugate the verb to `were` or `was`, followed by the subject and then the main verb. 예시:
 
- `Were you at the meeting yesterday?` Notice how `were` comes before `you` to for a question. 
- `What was my assignment?` For a specific question, notice how `was` comes after `what` and before `my`. 
+ `Were you at the meeting yesterday?` Notice how `were` comes before `you` to for a question. `What was my assignment?` For a specific question, notice how `was` comes after `what` and before `my`.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b13088693ef4ce21ce0e4.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b13088693ef4ce21ce0e4.md
index 5a555480e1c..9d4003a88a4 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b13088693ef4ce21ce0e4.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b13088693ef4ce21ce0e4.md
@@ -8,7 +8,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-The term `checkout process` refers to the steps involved in completing a purchase, whether in a physical store or online. In a physical store, this usually involves taking items to a cashier, paying, and receiving a receipt. In online shopping, it includes adding items to a cart, entering shipping and payment details, and finalizing the order. 
+The term `checkout process` refers to the steps involved in completing a purchase, whether in a physical store or online. In a physical store, this usually involves taking items to a cashier, paying, and receiving a receipt. In online shopping, it includes adding items to a cart, entering shipping and payment details, and finalizing the order.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b145976723b56a97b8dda.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b145976723b56a97b8dda.md
index 299109790e0..71b218364c6 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b145976723b56a97b8dda.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b145976723b56a97b8dda.md
@@ -13,7 +13,7 @@ Candidate: I have a bachelor's degree in computer science from fCC University. D
 
 # --description--
 
-The phrase `I was introduced to` uses the simple past tense form `was` of the verb `be`, combined with the past participle `introduced`. This structure, `be` followed by a verb suffixed with `-ed`, is often used to describe actions that happened to the subject in the past. For example:
+The phrase `I was introduced to` uses the simple past tense form `was` of the verb `be`, combined with the past participle `introduced`. This structure, `be` followed by a verb suffixed with `-ed`, is often used to describe actions that happened to the subject in the past. 예시:
 
 `At college, I was introduced to many programing languages`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b153ac677705c7059530d.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b153ac677705c7059530d.md
index 5d81b22a9e7..dd1cc6a24e6 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b153ac677705c7059530d.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b153ac677705c7059530d.md
@@ -13,10 +13,9 @@ Anna: Hello! Thanks for coming in today. Could you tell me about your previous r
 
 # --description--
 
-The phrase `could you tell me` is a polite way to ask someone for information. It's commonly used in formal or professional situations, like job interviews or meetings.
-In English, some verbs have irregular past forms, meaning they do not follow the regular pattern of adding `-ed` to make the past tense. `Can` is one such verb, and its irregular simple past form is `could`. 
+The phrase `could you tell me` is a polite way to ask someone for information. It's commonly used in formal or professional situations, like job interviews or meetings. In English, some verbs have irregular past forms, meaning they do not follow the regular pattern of adding `-ed` to make the past tense. `Can` is one such verb, and its irregular simple past form is `could`.
 
-The existence of irregular forms, like `could`, often comes from the way language has evolved over time. These forms do not follow the regular patterns and need to be memorized. 
+The existence of irregular forms, like `could`, often comes from the way language has evolved over time. These forms do not follow the regular patterns and need to be memorized.
 
 For example:
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b20338e0802931673c1e1.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b20338e0802931673c1e1.md
index 67255d1bac6..0b93f4a34ef 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b20338e0802931673c1e1.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b20338e0802931673c1e1.md
@@ -9,7 +9,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-You've learned that for verbs ending in `e`, you simply add `d` to form the simple past tense. Choose the correct form of `love` to complete the sentence: 
+You've learned that for verbs ending in `e`, you simply add `d` to form the simple past tense. Choose the correct form of `love` to complete the sentence:
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b23f03b449aac2c517089.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b23f03b449aac2c517089.md
index daa0ed7fa3b..99de1dd4a65 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b23f03b449aac2c517089.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b23f03b449aac2c517089.md
@@ -8,7 +8,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-The word `took` is a special case in the simple past tense. It's the past tense of `take`. Unlike regular verbs that follow the standard `-ed` ending for the past tense, `take` changes to `took`. This irregular form is important to know because it's commonly used to talk about actions that happened in the past. Choose the correct past tense form of `take` to complete the sentence: 
+The word `took` is a special case in the simple past tense. It's the past tense of `take`. Unlike regular verbs that follow the standard `-ed` ending for the past tense, `take` changes to `took`. This irregular form is important to know because it's commonly used to talk about actions that happened in the past. Choose the correct past tense form of `take` to complete the sentence:
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b2c040bb5f6c77fa5df80.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b2c040bb5f6c77fa5df80.md
index f55f7908a4f..5bc9a6c37b3 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b2c040bb5f6c77fa5df80.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b2c040bb5f6c77fa5df80.md
@@ -13,7 +13,7 @@ Alice: Absolutely. It was challenging, but I loved it.
 
 # --description--
 
-This task is a review exercise. You'll be filling in blanks with words you're already familiar with. 
+This task is a review exercise. You'll be filling in blanks with words you're already familiar with.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b30e1b9f035e7e656fd01.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b30e1b9f035e7e656fd01.md
index f843ccf34aa..71033e3beee 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b30e1b9f035e7e656fd01.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-ask-and-share-about-educational-and-professional-background/657b30e1b9f035e7e656fd01.md
@@ -13,7 +13,7 @@ Anna: I saw that tech companies appreciate innovation and care for the employees
 
 # --description--
 
-An `employee` is someone who works for a company or a person. When you talk about `employees' well-being`, you are talking about the health and happiness of all the people who work there. The `'s` after `employees` means that the well-being belongs to the employees. It's like `the cat's toy` (one cat) and `the cats' toy` (more than one cat). 
+An `employee` is someone who works for a company or a person. When you talk about `employees' well-being`, you are talking about the health and happiness of all the people who work there. The `'s` after `employees` means that the well-being belongs to the employees. It's like `the cat's toy` (one cat) and `the cats' toy` (more than one cat).
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b5cc5a8b3897908c962f0.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b5cc5a8b3897908c962f0.md
index f90726b36c6..d59e0d5cee5 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b5cc5a8b3897908c962f0.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b5cc5a8b3897908c962f0.md
@@ -13,7 +13,7 @@ Sophie: Hey James, what's your cybersecurity project about?
 
 # --description--
 
-`Cybersecurity` is about keeping computers and online information safe. It stops bad people from stealing or damaging what's on computers and the internet. 
+`Cybersecurity` is about keeping computers and online information safe. It stops bad people from stealing or damaging what's on computers and the internet.
 
 For example, when you use a password to protect your email, or when a website keeps your credit card information safe, that's cybersecurity. It's important because we use computers and the internet a lot.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b5d955d8b2679be66a4db.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b5d955d8b2679be66a4db.md
index 7757fe88778..f15bac870f1 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b5d955d8b2679be66a4db.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b5d955d8b2679be66a4db.md
@@ -5,6 +5,7 @@ challengeType: 19
 dashedName: task-2
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE:
 Sophie: Hey James, what's your cybersecurity project about?
@@ -12,7 +13,7 @@ Sophie: Hey James, what's your cybersecurity project about?
 
 # --description--
 
-`What` is often used to ask for specific information. 
+`What` is often used to ask for specific information.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b5ef161f6777ae5eb3ba4.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b5ef161f6777ae5eb3ba4.md
index 13a5abee3ed..30e237cce7b 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b5ef161f6777ae5eb3ba4.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b5ef161f6777ae5eb3ba4.md
@@ -15,9 +15,9 @@ James: Hi Sophie! I'm checking our network for problems.
 
 The preposition `for` is often used to explain the reason why we do something. Notice how `for` is followed by the reason or purpose of the action:
 
-`I'm studying English for my job` - `for my job` explains the reason for studying English. 
+`I'm studying English for my job` - `for my job` explains the reason for studying English.
 
-`I go to the gym for my health` - it means they go to the gym to stay healthy. 
+`I go to the gym for my health` - it means they go to the gym to stay healthy.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b62a491cb2d7c687a1a2a.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b62a491cb2d7c687a1a2a.md
index 7aba779a7b5..6fb3e3d7694 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b62a491cb2d7c687a1a2a.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b62a491cb2d7c687a1a2a.md
@@ -5,6 +5,7 @@ challengeType: 19
 dashedName: task-4
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE:
 James: Hi Sophie! I'm checking our network for problems. We want to be safe from hackers.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b63d0da84237d16c55d7e.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b63d0da84237d16c55d7e.md
index 75956bee9a4..fb876f7c31f 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b63d0da84237d16c55d7e.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b63d0da84237d16c55d7e.md
@@ -13,11 +13,11 @@ James: I'm using special tools to see where we might have problems, and then I h
 
 # --description--
 
-The word `might` is used to express possibility or uncertainty. It's similar to `may` but often implies a lower probability. For example:
+The word `might` is used to express possibility or uncertainty. It's similar to `may` but often implies a lower probability. 예시:
 
-`I might go to the park` 
+`I might go to the park`
 
-It means there's a possibility of going to the park, but it's not certain. 
+It means there's a possibility of going to the park, but it's not certain.
 
 In James's sentence, `might` suggests that there are possible problems he's looking for, but he's not sure yet.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b6522da78357de8428a19.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b6522da78357de8428a19.md
index 863c805e5fc..6bcf8aa6abb 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b6522da78357de8428a19.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b6522da78357de8428a19.md
@@ -13,13 +13,13 @@ James: I'm using special tools to see where we might have problems, and then I h
 
 # --description--
 
-James uses the present continuous tense to talk about actions happening at the moment of speaking or around it. 
+James uses the present continuous tense to talk about actions happening at the moment of speaking or around it.
 
-The present continuous is formed with the present tense of the verb `to be` (`am/is/are`) followed by the `-ing` form of the main verb. For example: 
+The present continuous is formed with the present tense of the verb `to be` (`am/is/are`) followed by the `-ing` form of the main verb. For example:
 
-`I am using` in `I am using special tools` shows an action James is currently working on. 
+`I am using` in `I am using special tools` shows an action James is currently working on.
 
-This tense is often used for actions that are temporary or in progress. Some more examples include: 
+This tense is often used for actions that are temporary or in progress. Some more examples include:
 
 `She is studying for the interview` (she is currently focused on studying).
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b67f02eecf57fa75ceecf.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b67f02eecf57fa75ceecf.md
index e00ff6d0660..6a5e0e7ed71 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b67f02eecf57fa75ceecf.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b67f02eecf57fa75ceecf.md
@@ -13,10 +13,9 @@ Sophie: That's important work. I'm helping our team learn how to stay safe onlin
 
 # --description--
 
-`Stay` is used to indicate remaining in a particular state or condition. 
-It's often used in instructions or advice to keep oneself in a certain situation. For example:
+`Stay` is used to indicate remaining in a particular state or condition. It's often used in instructions or advice to keep oneself in a certain situation. 예시:
 
-`Stay safe online` (continue being safe while using the internet) 
+`Stay safe online` (continue being safe while using the internet)
 
 `Stay calm during the test` (continue being calm)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b69293e6e9480ed5f6624.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b69293e6e9480ed5f6624.md
index baaa5cfcff7..7ed1bd6e91c 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b69293e6e9480ed5f6624.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b69293e6e9480ed5f6624.md
@@ -5,6 +5,7 @@ challengeType: 19
 dashedName: task-9
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE:
 Sophie: That's important work. I'm helping our team learn how to stay safe online. We're taking some lessons and practicing what to do if someone tries to steal our identity.
@@ -12,13 +13,13 @@ Sophie: That's important work. I'm helping our team learn how to stay safe onlin
 
 # --description--
 
-In the context Sophie is speaking, `take` refers to participating in a particular experience, like a lesson or a course. 
+In the context Sophie is speaking, `take` refers to participating in a particular experience, like a lesson or a course.
 
-For example, `I'm taking a course in cybersecurity` means you are participating in a cybersecurity course. 
+For example, `I'm taking a course in cybersecurity` means you are participating in a cybersecurity course.
 
-Other examples are: 
+Other examples are:
 
-`She is taking Python classes` (she is learning to use Python by attending a course) 
+`She is taking Python classes` (she is learning to use Python by attending a course)
 
 `They are taking a break` (they are spending time resting or not working).
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b6a58626e2a82be5a78eb.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b6a58626e2a82be5a78eb.md
index ec3e40c2618..cc741436042 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b6a58626e2a82be5a78eb.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655b6a58626e2a82be5a78eb.md
@@ -13,11 +13,11 @@ Sophie: That's important work. I'm helping our team learn how to stay safe onlin
 
 # --description--
 
-To `steal` means to take something that doesn't belong to you without permission. For example:
+To `steal` means to take something that doesn't belong to you without permission. 예시:
 
 `Some people try to steal our data` means that there are people that try to take personal data without the owner's permission.
 
-`Identity` refers to who a person is, including their name, date of birth, and other personal information. For example: 
+`Identity` refers to who a person is, including their name, date of birth, and other personal information. 예:
 
 `Protecting your identity online is important` means keeping your personal information safe on the internet.
 # --question--
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655bd2158780e2421b674e61.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655bd2158780e2421b674e61.md
index df8dabb01a7..db155a7003c 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655bd2158780e2421b674e61.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655bd2158780e2421b674e61.md
@@ -7,11 +7,11 @@ dashedName: task-13
 
 # --description--
 
-`Data` means information, especially facts or numbers collected to be examined and considered and used to help decision-making. 
+`Data` means information, especially facts or numbers collected to be examined and considered and used to help decision-making.
 
-There are different types of data, like `quantitative data`, which is about numbers (like how many people visit a store), and `qualitative data`, which is about descriptions (like what people think about a product). 
+There are different types of data, like `quantitative data`, which is about numbers (like how many people visit a store), and `qualitative data`, which is about descriptions (like what people think about a product).
 
-`Customer data` is specific information about customers, like their buying habits or preferences. 
+`Customer data` is specific information about customers, like their buying habits or preferences.
 
 For example, a store might collect data on what times of day customers visit most often, or which products are most popular.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655bd2f3caad89436a3dcc04.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655bd2f3caad89436a3dcc04.md
index 932c839322a..18943e37a3a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655bd2f3caad89436a3dcc04.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655bd2f3caad89436a3dcc04.md
@@ -5,6 +5,7 @@ challengeType: 22
 dashedName: task-14
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!-- Audio reference: 
 Bob: Hi Sarah, what are you doing now?
 Sarah: Hi Bob! I'm looking at customer data to find patterns
@@ -12,13 +13,13 @@ Sarah: Hi Bob! I'm looking at customer data to find patterns
 
 # --description--
 
-`Patterns` are regular and repeated ways in which something happens or is done. In data, patterns can show trends or behaviors. 
+`Patterns` are regular and repeated ways in which something happens or is done. In data, patterns can show trends or behaviors.
 
 For example, a pattern in customer data might be that more people buy ice cream on hot days. This is a `trend pattern`.
 
-There are also `cycle patterns`, like a coffee shop selling more coffee in the morning. 
+There are also `cycle patterns`, like a coffee shop selling more coffee in the morning.
 
-Recognizing patterns helps businesses understand their customers better. 
+Recognizing patterns helps businesses understand their customers better.
 
 `Patterns` can be found in numbers, like sales increasing every month, or in behaviors, like customers preferring to shop online.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655bd798ce91bd4861b69281.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655bd798ce91bd4861b69281.md
index 7faa5661196..580287c00fd 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655bd798ce91bd4861b69281.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655bd798ce91bd4861b69281.md
@@ -13,17 +13,17 @@ Sarah: Hi Bob! I'm looking at customer data to find patterns. We're trying to un
 
 # --description--
 
-Present continuous is used for actions happening at the moment of speaking. For example:
+Present continuous is used for actions happening at the moment of speaking. 예시:
 
 `We're being successful with our marketing campaign` (Notice how the verb `to be` was conjugated as `being` to demonstrate that this is true at the present moment).
 
-Present continuous can be used in negative forms to express that something is not happening. For example:
+Present continuous can be used in negative forms to express that something is not happening. 예:
 
 `I'm not working today` (negative form)
 
 `They're not finding any solutions` (negative form)
 
-`To be successful with something` means achieving an objective. 
+`To be successful with something` means achieving an objective.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655be33b7a463a5593c91cb4.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655be33b7a463a5593c91cb4.md
index 30a40e36681..f5c3644b08b 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655be33b7a463a5593c91cb4.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655be33b7a463a5593c91cb4.md
@@ -5,6 +5,7 @@ challengeType: 22
 dashedName: task-21
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 Sarah: Pictures can be great to explain things. We are not using pictures, but it's surely fun to work with data like this.
@@ -12,11 +13,11 @@ Sarah: Pictures can be great to explain things. We are not using pictures, but i
 
 # --description--
 
-`Sure` means to be confident or certain about something. 
+`Sure` means to be confident or certain about something.
 
-When you add the suffix `-ly`, `sure` becomes an adverb, `surely`, which means doing something in a certain or confident way. 
+When you add the suffix `-ly`, `sure` becomes an adverb, `surely`, which means doing something in a certain or confident way.
 
-It's often used to emphasize what the speaker believes is true or likely to be true. For example:
+It's often used to emphasize what the speaker believes is true or likely to be true. 예:
 
 `Surely, you can see why this is important` (emphasizing that the importance is expected to be clear)
 
@@ -34,7 +35,7 @@ It's often used to emphasize what the speaker believes is true or likely to be t
 
 ### --feedback--
 
-Very good or very nice. 
+Very good or very nice.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9b2e0bcbe16161996ab7.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9b2e0bcbe16161996ab7.md
index 251a19476b3..511cdbcf00e 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9b2e0bcbe16161996ab7.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9b2e0bcbe16161996ab7.md
@@ -5,6 +5,7 @@ challengeType: 19
 dashedName: task-23
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 Mark: Hi Maria! I'm testing a new software to find problems.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9bcb5bedb4620acb6f18.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9bcb5bedb4620acb6f18.md
index 062ab897d1a..89723356940 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9bcb5bedb4620acb6f18.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9bcb5bedb4620acb6f18.md
@@ -5,13 +5,14 @@ challengeType: 19
 dashedName: task-24
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 Mark: It’s a nice experience so far, but we're doing more tests to make sure everything works.
 -->
 # --description--
 
-`Main` means the most important or biggest part of something. For example:
+`Main` means the most important or biggest part of something. 예시:
 
 `The main thing I do at work is writing code` This means the most important or big part of the job is writing code.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9d9470acf0643482b95b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9d9470acf0643482b95b.md
index ce7700d51b5..b9478c83560 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9d9470acf0643482b95b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9d9470acf0643482b95b.md
@@ -5,6 +5,7 @@ challengeType: 19
 dashedName: task-25
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 Mark: We're also asking some people to tell us what they think. It's a bit busy, but I'm learning a lot.
@@ -12,11 +13,11 @@ Mark: We're also asking some people to tell us what they think. It's a bit busy,
 
 # --description--
 
-Remember: `Their` is a possessive pronoun. It shows that something belongs to a group of people. 
+Remember: `Their` is a possessive pronoun. It shows that something belongs to a group of people.
 
 For example, `Their opinions are important` means the opinions of a group of people are important.
 
-`Thoughts` means what someone thinks or their ideas. When we ask for someone's `thoughts`, we want to know what they think or feel about something. For example:
+`Thoughts` means what someone thinks or their ideas. When we ask for someone's `thoughts`, we want to know what they think or feel about something. 예:
 
 `What are their thoughts on this book?` is asking for the group's opinion about the book.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9ee249f7ef65f6d2dd36.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9ee249f7ef65f6d2dd36.md
index 07885fa5cb5..7b5f341dc22 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9ee249f7ef65f6d2dd36.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655c9ee249f7ef65f6d2dd36.md
@@ -5,6 +5,7 @@ challengeType: 19
 dashedName: task-27
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 Maria: That's good to hear. I'm managing the team that's making a new part for the client's platform. We're trying to do it and talk to the client to make sure they like it.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655ca014b022ff6692049b91.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655ca014b022ff6692049b91.md
index 6a5e8ecd2e9..42708ceb780 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655ca014b022ff6692049b91.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655ca014b022ff6692049b91.md
@@ -5,6 +5,7 @@ challengeType: 22
 dashedName: task-28
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 Mark: Nice. Good luck there.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655cadb5df07e269cccaa056.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655cadb5df07e269cccaa056.md
index ea7c16ccd96..0381ce3d23d 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655cadb5df07e269cccaa056.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/655cadb5df07e269cccaa056.md
@@ -5,6 +5,7 @@ challengeType: 22
 dashedName: task-29
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 Amy: Hi Brian, what's hapening with your projects?
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a43974f689442c0a0eeb2.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a43974f689442c0a0eeb2.md
index 85b4ec6e68c..c3d73121d9c 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a43974f689442c0a0eeb2.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a43974f689442c0a0eeb2.md
@@ -13,11 +13,11 @@ Amy: That sounds like a good idea, Brian. I'm _ working on a series of blog post
 
 # --description--
 
-`Currently` comes from `current` meaning happening now. Adding `-ly` turns an adjective into an adverb. For example:
+`Currently` comes from `current` meaning happening now. Adding `-ly` turns an adjective into an adverb. 예시:
 
 `She is currently reading a book` (She is reading a book now)
 
-`Trends` are popular styles or ideas that many people are talking about or doing. The word `trend` in singular becomes `trends` in plural. For example:
+`Trends` are popular styles or ideas that many people are talking about or doing. The word `trend` in singular becomes `trends` in plural. 예:
 
 `One current trend is using eco-friendly products` (singular)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a45d4f36ea1448aa359d2.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a45d4f36ea1448aa359d2.md
index ff338cab86a..657ca81aa02 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a45d4f36ea1448aa359d2.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a45d4f36ea1448aa359d2.md
@@ -13,7 +13,7 @@ Brian: That sounds interesting! Are you using any new tools or strategies to cre
 
 # --description--
 
-`Engaging` means interesting or able to attract attention. For example:
+`Engaging` means interesting or able to attract attention. 예시:
 
 `She writes engaging stories` means her stories are very interesting.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a46e84a0ad845901ea907.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a46e84a0ad845901ea907.md
index 9613a8141d4..ab1167febc7 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a46e84a0ad845901ea907.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a46e84a0ad845901ea907.md
@@ -15,9 +15,9 @@ Amy: Yes, I am. I'm experimenting with video interviews and interactive infograp
 
 `Readers` are people who read, especially those who read a particular publication.
 
-To `experiment` means to try new ideas or methods. 
+To `experiment` means to try new ideas or methods.
 
-An `interview` is a conversation where someone asks questions to get information. 
+An `interview` is a conversation where someone asks questions to get information.
 
 An `infographic` is a visual image like a chart or diagram used to represent information. For example:
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a48d41b97ff476586ee9c.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a48d41b97ff476586ee9c.md
index d2a40b59462..5c5c3273b0c 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a48d41b97ff476586ee9c.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a48d41b97ff476586ee9c.md
@@ -13,11 +13,11 @@ Brian: That's great, Amy! Tell us when the blog posts are _ . I'm looking _ to r
 
 # --description--
 
-Brian uses specific expressions in his conversation. `To be out`, in this context, means to be available or published. For example:
+Brian uses specific expressions in his conversation. `To be out`, in this context, means to be available or published. 예시:
 
 `The new book is out next week.` means the book will be available then.
 
-`Looking forward to + verb-ing` is a common way to express excitement about a future event. For example:
+`Looking forward to + verb-ing` is a common way to express excitement about a future event. 예:
 
 `I'm looking forward to meeting you.` (excited about meeting someone)
 
@@ -35,7 +35,7 @@ Brian uses specific expressions in his conversation. `To be out`, in this contex
 
 ### --feedback--
 
-Preposition used by Brian after `are`. 
+Preposition used by Brian after `are`.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a49a16377b8485270dd2d.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a49a16377b8485270dd2d.md
index a41f7090865..6b2ab468e51 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a49a16377b8485270dd2d.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a49a16377b8485270dd2d.md
@@ -17,7 +17,7 @@ Bob: Hi Sarah, what are you up to these days?
 
 `What are you up to` is a friendly way to ask someone what they are doing. It's like asking, "What are you doing these days?"
 
-For example:
+예시:
 
 `What are you up to this weekend?` means "What are your plans for this weekend?"
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4a4225a07e491ca4f31e.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4a4225a07e491ca4f31e.md
index 1ff04ab42e2..fa17b8dac62 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4a4225a07e491ca4f31e.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4a4225a07e491ca4f31e.md
@@ -37,7 +37,7 @@ Sarah does not mention being busy.
 
 ### --feedback--
 
-Sarah did not say she is looking for projects. 
+Sarah did not say she is looking for projects.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4bea53d6fd4ae86bdb70.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4bea53d6fd4ae86bdb70.md
index 9a518ebbd20..cef02b0fcc4 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4bea53d6fd4ae86bdb70.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4bea53d6fd4ae86bdb70.md
@@ -13,18 +13,15 @@ Sarah: Absolutely! I'm learning new _ that I _ will be _ in my future projects.
 
 # --description--
 
-`Believe` means to have confidence or trust in something. 
-For example:
+`Believe` means to have confidence or trust in something. 예시:
 
-`I believe you will do well.` 
+`I believe you will do well.`
 
-`Skills` are abilities or expertise in certain areas. 
-For example:
+`Skills` are abilities or expertise in certain areas. 예:
 
-`She has excellent writing skills.` 
+`She has excellent writing skills.`
 
-`Valuable` means very useful or important. 
-For example:
+`Valuable` means very useful or important. 예시:
 
 `Her advice is very valuable to me.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4c42ee183c4b3b92bfeb.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4c42ee183c4b3b92bfeb.md
index eda3a453d17..2fa93da61f2 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4c42ee183c4b3b92bfeb.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4c42ee183c4b3b92bfeb.md
@@ -13,11 +13,11 @@ By the _, what's keeping you _ these days?
 
 # --description--
 
-`Busy` means having a lot to do; being actively involved in something. 
+`Busy` means having a lot to do; being actively involved in something.
 
 For example, `She's busy with her project.`
 
-`By the way` is used to introduce a new topic or ask a question that's not directly related to the current conversation. It's like saying, "Oh, I just thought of something else." 
+`By the way` is used to introduce a new topic or ask a question that's not directly related to the current conversation. It's like saying, "Oh, I just thought of something else."
 
 For example, `By the way, have you seen the new blog feature?`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4d1943d8f24c030ded74.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4d1943d8f24c030ded74.md
index 6db5eefdbf0..48202d11687 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4d1943d8f24c030ded74.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4d1943d8f24c030ded74.md
@@ -4,11 +4,12 @@ title: Task 53
 challengeType: 19
 dashedName: task-53
 ---
+
 # --description--
 
-When someone uses `either` at the end of a negative sentence, it means the same situation applies to them too. For example: 
+When someone uses `either` at the end of a negative sentence, it means the same situation applies to them too. For example:
 
-`I don't like carrots. My sister doesn't like them either.` 
+`I don't like carrots. My sister doesn't like them either.`
 
 Here, `either` means both the speaker and their sister don’t like carrots.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4dd03541de4ca98a61e8.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4dd03541de4ca98a61e8.md
index 90cde0193e9..d538980b7a2 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4dd03541de4ca98a61e8.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4dd03541de4ca98a61e8.md
@@ -13,7 +13,7 @@ Bob: I'm taking some time to review our data security protocols.
 
 # --description--
 
-`To take some time to` is used when someone plans to spend a certain amount of time doing a specific task. It often implies careful attention or a focus on detail. 
+`To take some time to` is used when someone plans to spend a certain amount of time doing a specific task. It often implies careful attention or a focus on detail.
 
 `He's taking some time to finish his report` means he is dedicating time to complete his report with attention.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4e001d2b804cdea7000a.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4e001d2b804cdea7000a.md
index 8ce6a9de884..342071472fb 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4e001d2b804cdea7000a.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4e001d2b804cdea7000a.md
@@ -13,17 +13,17 @@ Bob: I'm questioning if our current practices are robust enough to protect sensi
 
 # --description--
 
-`Robust` means strong or powerful. For example:
+`Robust` means strong or powerful. 예시:
 
-`A robust system can handle many users.` 
+`A robust system can handle many users.`
 
-`Enough` means as much as is necessary. For example:
+`Enough` means as much as is necessary. 예:
 
-`Do we have enough chairs?` 
+`Do we have enough chairs?`
 
 Together, `robust enough` means being strong or effective to the necessary degree. For example, this sentence asks if the password is strong enough to stop hackers:
 
-`Is the password robust enough to prevent hacking?` 
+`Is the password robust enough to prevent hacking?`
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4e35a774444d1946a899.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4e35a774444d1946a899.md
index ff20dfce924..606392a86b3 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4e35a774444d1946a899.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4e35a774444d1946a899.md
@@ -13,7 +13,7 @@ Bob: It's essential to ensure our data is secure.
 
 # --description--
 
-The word `ensure` means to make sure or guarantee something. For example:
+The word `ensure` means to make sure or guarantee something. 예시:
 
 `We ensure quality by checking every product.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4e8a59ef3c4d8dfc2ad9.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4e8a59ef3c4d8dfc2ad9.md
index fbdf292c876..8cd4889b3fc 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4e8a59ef3c4d8dfc2ad9.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-describe-your-current-project/656a4e8a59ef3c4d8dfc2ad9.md
@@ -14,17 +14,17 @@ Bob: Indeed. It's a continuous _ to _ to new security challenges.
 
 # --description--
 
-To `adapt` means to change or adjust to new conditions. For example:
+To `adapt` means to change or adjust to new conditions. 예시:
 
 `Businesses must adapt to new technologies.`
 
-`Effort` means the physical or mental energy needed to do something. For example:
+`Effort` means the physical or mental energy needed to do something. 예:
 
-`It takes a lot of effort to learn a new language.` 
+`It takes a lot of effort to learn a new language.`
 
-`Indeed` is used to agree strongly or to confirm that something is true. For example:
+`Indeed` is used to agree strongly or to confirm that something is true. 예시:
 
-`Indeed, the results were excellent.` 
+`Indeed, the results were excellent.`
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/65569ebbc9ef9f7b5b99827b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/65569ebbc9ef9f7b5b99827b.md
index bb5002b6cc2..c79fa8f66f8 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/65569ebbc9ef9f7b5b99827b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/65569ebbc9ef9f7b5b99827b.md
@@ -8,11 +8,11 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-`Look` can refer to both the action of seeing and to someone's appearance. For example, `You look great!` is about appearance, not looking at a place. 
+`Look` can refer to both the action of seeing and to someone's appearance. For example, `You look great!` is about appearance, not looking at a place.
 
-It's important to be careful when commenting on someone's appearance, as it can be sensitive. 
+It's important to be careful when commenting on someone's appearance, as it can be sensitive.
 
-Use such comments only with people you know well and in an appropriate context. 
+Use such comments only with people you know well and in an appropriate context.
 
 Other examples include `You look tired`, or `You look excited`.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556ba2fe6c3f3846ea71ab2.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556ba2fe6c3f3846ea71ab2.md
index 5d96eed824b..5da7410ed14 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556ba2fe6c3f3846ea71ab2.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556ba2fe6c3f3846ea71ab2.md
@@ -8,7 +8,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-`It seems like` is used to express a personal observation or feeling about someone or something, similar to saying `It appears that` or `It looks as if`. 
+`It seems like` is used to express a personal observation or feeling about someone or something, similar to saying `It appears that` or `It looks as if`.
 
 For example, you can say `It seems like it's going to rain today` when looking at cloudy skies.
 
@@ -25,7 +25,7 @@ For example, you can say `It seems like it's going to rain today` when looking a
 
 ### --feedback--
 
-This is a third person pronoun. Start this with a capital letter. 
+This is a third person pronoun. Start this with a capital letter.
 
 ---
 `seems`
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556bc95e6ce5d850d37dd07.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556bc95e6ce5d850d37dd07.md
index 2403561330f..6e649146182 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556bc95e6ce5d850d37dd07.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556bc95e6ce5d850d37dd07.md
@@ -16,7 +16,7 @@ Delete this after adding the audio.
 
 # --description--
 
-Adjectives are words that describe or give more information about nouns or pronouns. For example, in the phrase `the blue sky`, `blue` is an adjective describing the sky. 
+Adjectives are words that describe or give more information about nouns or pronouns. For example, in the phrase `the blue sky`, `blue` is an adjective describing the sky.
 
 Notice how the adjective comes before the noun. It is `blue sky` not `sky blue`.
 
@@ -24,8 +24,7 @@ Expressive language can include idiomatic expressions or descriptive adjectives
 
 Here are some more examples:
 
-`She wakes up early every day` - `Early` describes the time of her waking up.
-`He has a quick shower in the morning` - `Quick` describes the short duration of the shower.
+`She wakes up early every day` - `Early` describes the time of her waking up. `He has a quick shower in the morning` - `Quick` describes the short duration of the shower.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556be93f9fcb88ac9e88b0d.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556be93f9fcb88ac9e88b0d.md
index 6942af9b64b..72a7535689f 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556be93f9fcb88ac9e88b0d.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556be93f9fcb88ac9e88b0d.md
@@ -16,16 +16,13 @@ Delete this after adding the audio.
 
 # --description--
 
-Idiomatic expressions are phrases where the words together have a different meaning than the individual words might suggest. 
+Idiomatic expressions are phrases where the words together have a different meaning than the individual words might suggest.
 
-`A ton of energy` is an idiomatic expression meaning having a lot of energy, similar to saying `loads of energy`. 
+`A ton of energy` is an idiomatic expression meaning having a lot of energy, similar to saying `loads of energy`.
 
 Another expression would be `I slept like a rock,` which means sleeping very deeply. Here are some more examples of Idiomatic Expressions:
 
-`She's feeling blue today.` (feeling sad)
-`This math problem is a piece of cake.` (very easy)
-`He's in hot water now.` (in trouble)
-`They see eye to eye.` (agree with each other)
+`She's feeling blue today.` (feeling sad) `This math problem is a piece of cake.` (very easy) `He's in hot water now.` (in trouble) `They see eye to eye.` (agree with each other)
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c24670683b8d6d80bb32.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c24670683b8d6d80bb32.md
index 6724fa2cc4a..3e9f0407122 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c24670683b8d6d80bb32.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c24670683b8d6d80bb32.md
@@ -17,7 +17,7 @@ Delete this after adding the audio.
 
 # --description--
 
-Listen to Sarah and fill in the words that help to sequence activities clearly. 
+Listen to Sarah and fill in the words that help to sequence activities clearly.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c3561e21d38e21518845.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c3561e21d38e21518845.md
index 9e71d5c6efd..8627fff8e3b 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c3561e21d38e21518845.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c3561e21d38e21518845.md
@@ -15,7 +15,7 @@ Delete this after adding the audio.
 -->
 # --description--
 
-`Ordinary` means normal or usual. Something ordinary is not special or different. For example:
+`Ordinary` means normal or usual. Something ordinary is not special or different. 예시:
 
 `Eating cereal for breakfast is ordinary`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c456a11da38ed3275f67.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c456a11da38ed3275f67.md
index 5e2555ab99b..f836688a197 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c456a11da38ed3275f67.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c456a11da38ed3275f67.md
@@ -5,6 +5,7 @@ challengeType: 19
 dashedName: task-9
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 Sarah: Hey, James! Thanks. Look, I don't do anything out of the ordinary, I think. I usually wake up around 7 AM. The first thing I do is stretch a bit to wake up. Then, I go straight to the kitchen to make a cup of coffee. It's my morning fuel!
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c5977ba8d5900c230ce5.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c5977ba8d5900c230ce5.md
index aefc0e8acc1..72f8ddce23f 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c5977ba8d5900c230ce5.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c5977ba8d5900c230ce5.md
@@ -5,6 +5,7 @@ challengeType: 22
 dashedName: task-10
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 audio: Sarah: Hey, James! Thanks. Look, I don't do anything out of the ordinary, I think. I usually wake up around 7 AM. The first thing I do is stretch a bit to wake up.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c78eac427390aafa26ff.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c78eac427390aafa26ff.md
index 0635c61f92b..74a68ae581f 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c78eac427390aafa26ff.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6556c78eac427390aafa26ff.md
@@ -5,6 +5,7 @@ challengeType: 19
 dashedName: task-11
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 The first thing I do is stretch a bit to wake up. Then, I go straight to the kitchen to make a cup of coffee. It's my morning fuel!
@@ -14,7 +15,7 @@ Delete this after adding the audio.
 -->
 # --description--
 
-`Go straight to` describes the action of going directly to a place without any stops along the way. 
+`Go straight to` describes the action of going directly to a place without any stops along the way.
 
 For example: `As soon as I arrive at the office, I go straight to my desk to check my emails.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/65578ed1a4ae65a8fbc341f5.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/65578ed1a4ae65a8fbc341f5.md
index e91eabe9d3a..56a66708b05 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/65578ed1a4ae65a8fbc341f5.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/65578ed1a4ae65a8fbc341f5.md
@@ -13,7 +13,7 @@ Sarah: Hey, James! Thanks. Look, I don't do anything out of the ordinary, I thin
 
 # --description--
 
-The word `fuel` typically refers to a substance that is used to produce energy, like gasoline for cars or coal for trains. However, in everyday language, people often use `fuel` to describe something that gives them energy or motivation. 
+The word `fuel` typically refers to a substance that is used to produce energy, like gasoline for cars or coal for trains. However, in everyday language, people often use `fuel` to describe something that gives them energy or motivation.
 
 For example, someone might call food or drink their `fuel` if it helps them to start the day with energy.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655792631f21afaa40c611e1.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655792631f21afaa40c611e1.md
index ac7e85e023d..884004b4897 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655792631f21afaa40c611e1.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655792631f21afaa40c611e1.md
@@ -13,7 +13,7 @@ James: Coffee is always a good start! What do you do after that?
 
 # --description--
 
-The words `before` and `after` are used to describe the order of events in time. 
+The words `before` and `after` are used to describe the order of events in time.
 
 `Before` is used to talk about something that happens earlier than another event, and `after` is used for something that happens later. For example:
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557985a95ab6db1c4a31b6c.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557985a95ab6db1c4a31b6c.md
index b86912437d1..7de07b3d74b 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557985a95ab6db1c4a31b6c.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557985a95ab6db1c4a31b6c.md
@@ -3,17 +3,13 @@ id: 6557985a95ab6db1c4a31b6c
 title: task 15
 challengeType: 19
 dashedName: task-15
-
 ---
 
 # --description--
 
 The verb `take` is used in many common English expressions. When `take` is used with different nouns, it can have special meanings. For example:
 
-`Take a shower` means to shower.
-`Take a walk` means to go for a walk.
-`Take a nap` means to sleep for a little while.
-`Take a chance` means to try something that might be risky.
+`Take a shower` means to shower. `Take a walk` means to go for a walk. `Take a nap` means to sleep for a little while. `Take a chance` means to try something that might be risky.
 
 These phrases are like fixed recipes in English; the words go together to mean something specific.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557995f0d97e1b2837a3081.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557995f0d97e1b2837a3081.md
index 3e26f88ed63..941b6876351 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557995f0d97e1b2837a3081.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557995f0d97e1b2837a3081.md
@@ -9,9 +9,7 @@ dashedName: task-16
 
 Remember, adjectives are words that describe or give more information about nouns. They can tell you how something looks, feels, or acts. For example:
 
-`Quick` describes something done in a short time.
-`Relaxed` describes something or someone calm and not strict.
-`Alert` describes being fully aware and paying attention.
+`Quick` describes something done in a short time. `Relaxed` describes something or someone calm and not strict. `Alert` describes being fully aware and paying attention.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/65579a0e1613d5b31a034ee5.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/65579a0e1613d5b31a034ee5.md
index 52a76374917..4fe2f8ab4cb 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/65579a0e1613d5b31a034ee5.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/65579a0e1613d5b31a034ee5.md
@@ -9,11 +9,9 @@ dashedName: task-17
 
 The verb `get` is very common in English and has many uses. It can mean to receive, become, or reach a state. For example:
 
-`Get dressed` means to put on clothes.
-`Get ready` means to prepare for something.
-`Get tired` means to start feeling tired.
+`Get dressed` means to put on clothes. `Get ready` means to prepare for something. `Get tired` means to start feeling tired.
 
-Understanding how `get` is used will help you express different actions and states in English. 
+Understanding how `get` is used will help you express different actions and states in English.
 
 Note: Don't let the many meanings of `get` scare you. Learn one usage at a time and try to have fun discovering its several meanings.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557aee56ed7dcb5506a66d6.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557aee56ed7dcb5506a66d6.md
index 8e8ae3c7b08..70862c53b4a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557aee56ed7dcb5506a66d6.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557aee56ed7dcb5506a66d6.md
@@ -9,8 +9,7 @@ dashedName: task-18
 
 A `dress code` is a set of rules about what you should wear in a certain place or event. Different places have different dress codes. For example:
 
-A `relaxed dress code` means you can wear casual, comfortable clothes.
-A `formal dress code` requires more official and elegant clothes.
+A `relaxed dress code` means you can wear casual, comfortable clothes. A `formal dress code` requires more official and elegant clothes.
 
 Note: Remember, dress codes can vary depending on the culture and the specific place.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557b68486fe9bb7b52a4308.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557b68486fe9bb7b52a4308.md
index f4db1332de0..4566ae5ab17 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557b68486fe9bb7b52a4308.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557b68486fe9bb7b52a4308.md
@@ -13,7 +13,7 @@ Sarah: After coffee, I like to take a quick shower to freshen up. It helps me fe
 
 # --description--
 
-Listen to the dialogue and fill in the blanks with words you've learned from previous challenges. 
+Listen to the dialogue and fill in the blanks with words you've learned from previous challenges.
 
 # --fillInTheBlank--
 
@@ -58,8 +58,7 @@ This word is used here to mean 'start' or 'begin'.
 `T-shirt`
 
 ### --feedback--
-The first letter of this word should be capitalized.
-A casual top typically made of cotton, with short sleeves and no collar.
+The first letter of this word should be capitalized. A casual top typically made of cotton, with short sleeves and no collar.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557bb81a99580b97a8b1c3b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557bb81a99580b97a8b1c3b.md
index 02fe0c6c416..ce5aa88614f 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557bb81a99580b97a8b1c3b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557bb81a99580b97a8b1c3b.md
@@ -5,6 +5,7 @@ challengeType: 22
 dashedName: task-22
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 James: Yeah, me too. What's next in your routine?
@@ -27,7 +28,7 @@ Understanding the sequence of events in a conversation can help you better follo
 
 ### --feedback--
 
-The opposite of before 
+The opposite of before
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557bd443a1a57ba598bff47.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557bd443a1a57ba598bff47.md
index 7006d9681f2..aa00de517c6 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557bd443a1a57ba598bff47.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557bd443a1a57ba598bff47.md
@@ -5,6 +5,7 @@ challengeType: 19
 dashedName: task-23
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 Breakfast is important to keep my energy up during the morning.
@@ -12,7 +13,7 @@ Breakfast is important to keep my energy up during the morning.
 
 # --description--
 
-`Keep my energy up` is an example of how English speakers often use verbs with adverbs or prepositions to express a specific idea. 
+`Keep my energy up` is an example of how English speakers often use verbs with adverbs or prepositions to express a specific idea.
 
 In this case, `keep` means to maintain, and `up` means at a high level. So, `keep my energy up` means to maintain a high level of energy.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557c1dff9d170bc911fd82b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557c1dff9d170bc911fd82b.md
index 048d7da0f62..3280d3b1468 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557c1dff9d170bc911fd82b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557c1dff9d170bc911fd82b.md
@@ -7,9 +7,9 @@ dashedName: task-24
 
 # --description--
 
-The word `balanced` can be an adjective or the past tense of the verb `balance`. As an adjective, it describes something that is in a state of equilibrium or evenly distributed, like in `a balanced breakfast`. 
+The word `balanced` can be an adjective or the past tense of the verb `balance`. As an adjective, it describes something that is in a state of equilibrium or evenly distributed, like in `a balanced breakfast`.
 
-As a verb, `balance` (and its past tense `balanced`) means to keep or put something in a steady position so that it does not fall. 
+As a verb, `balance` (and its past tense `balanced`) means to keep or put something in a steady position so that it does not fall.
 
 In a sentence, if `balanced` is used before a noun (like `balanced diet`), it's an adjective.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557c30b85e792bd0c1e8206.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557c30b85e792bd0c1e8206.md
index 0eec1ae5f55..53088ba3079 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557c30b85e792bd0c1e8206.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557c30b85e792bd0c1e8206.md
@@ -27,7 +27,7 @@ What does Sarah typically have for breakfast?
 
 ### --feedback--
 
-This choice doesn't match Sarah's description. 
+This choice doesn't match Sarah's description.
 
 ---
 
@@ -39,7 +39,7 @@ This choice doesn't match Sarah's description.
 
 ### --feedback--
 
-Pancakes and syrup are not mentioned by Sarah. 
+Pancakes and syrup are not mentioned by Sarah.
 
 ---
 
@@ -47,7 +47,7 @@ Pancakes and syrup are not mentioned by Sarah.
 
 ### --feedback--
 
-This choice is not what Sarah mentions. 
+This choice is not what Sarah mentions.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557d6a229e541bfde2c560d.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557d6a229e541bfde2c560d.md
index 2a92deb251d..50f4bb99319 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557d6a229e541bfde2c560d.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557d6a229e541bfde2c560d.md
@@ -5,6 +5,7 @@ challengeType: 19
 dashedName: task-26
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 James: An early coffee and then breakfast!
@@ -12,12 +13,11 @@ James: An early coffee and then breakfast!
 
 # --description--
 
-`Early` refers to doing something sooner or before the usual time, like waking up early in the morning. 
+`Early` refers to doing something sooner or before the usual time, like waking up early in the morning.
 
 `Late` means doing something after the expected or usual time, like arriving late to a meeting. Here are some examples:
 
-`She likes to start her day early with a jog.`
-`He often works late at the office.`
+`She likes to start her day early with a jog.` `He often works late at the office.`
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557d782bc7613c06aa7dafd.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557d782bc7613c06aa7dafd.md
index bb0b04138fe..f2b2c37daf1 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557d782bc7613c06aa7dafd.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557d782bc7613c06aa7dafd.md
@@ -5,6 +5,7 @@ challengeType: 19
 dashedName: task-27
 audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 ---
+
 <!--
 AUDIO REFERENCE: 
 James: An early coffee and then breakfast! I never thought of that!
@@ -12,12 +13,11 @@ James: An early coffee and then breakfast! I never thought of that!
 -->
 # --description--
 
-The word `never` is an adverb used to mean `not at any time` or `not ever`. It's often used to talk about things that someone doesn't do or hasn't done. For example:
+The word `never` is an adverb used to mean `not at any time` or `not ever`. It's often used to talk about things that someone doesn't do or hasn't done. 예시:
 
-`I have never been to Australia.` (means the person has not visited Australia at any time)
-`She never eats fast food.` (means she does not eat fast food at any time)
+`I have never been to Australia.` (means the person has not visited Australia at any time) `She never eats fast food.` (means she does not eat fast food at any time)
 
-The word `thought` is the past tense of `think`. `Thought of that` means to have considered or come up with an idea in the past. For example:
+The word `thought` is the past tense of `think`. `Thought of that` means to have considered or come up with an idea in the past. 예:
 
 `I thought of going to the beach, but it was too cold.` (means the person considered going to the beach)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557db51366bf6c15a966fb0.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557db51366bf6c15a966fb0.md
index 1bc41656148..5904dbbfb5f 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557db51366bf6c15a966fb0.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557db51366bf6c15a966fb0.md
@@ -13,7 +13,7 @@ Sarah: It helps me stay awake early in the morning! Anyway, before leaving for w
 
 # --description--
 
-When a verb follows a preposition, it often takes the `-ing` form, known as a gerund. Gerunds are verbs acting as nouns. This rule is common in many English expressions. For example:
+When a verb follows a preposition, it often takes the `-ing` form, known as a gerund. Gerunds are verbs acting as nouns. This rule is common in many English expressions. 예시:
 
 `After eating dinner, we watched a movie.` (`eating` follows the preposition `after`)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557dc1aa6be93c1eb4e9efb.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557dc1aa6be93c1eb4e9efb.md
index 384ff6bd43f..948a652bf4a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557dc1aa6be93c1eb4e9efb.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557dc1aa6be93c1eb4e9efb.md
@@ -13,13 +13,11 @@ Sarah: Anyway, before leaving for work, I like to check my emails and messages t
 
 # --description--
 
-The word `if` is often used in conditional statements to talk about a possible situation and its consequences. For example:
+The word `if` is often used in conditional statements to talk about a possible situation and its consequences. 예시:
 
-`If it rains, I will bring an umbrella.` 
-(The action of bringing an umbrella depends on the possibility of rain.)
+`If it rains, I will bring an umbrella.` (The action of bringing an umbrella depends on the possibility of rain.)
 
-`If you need help, just ask.` 
-(The offer to help is conditional on the other person needing it.)
+`If you need help, just ask.` (The offer to help is conditional on the other person needing it.)
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557dea8c258c1c2a767deb7.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557dea8c258c1c2a767deb7.md
index 8c7827c40b2..f2d7f92bcce 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557dea8c258c1c2a767deb7.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557dea8c258c1c2a767deb7.md
@@ -13,7 +13,7 @@ James: I can't imagine being so productive even before coming to work!
 
 # --description--
 
-The word `even` is used to add emphasis to a statement, often highlighting something surprising, unexpected, or extreme. 
+The word `even` is used to add emphasis to a statement, often highlighting something surprising, unexpected, or extreme.
 
 When combined with `before` in the phrase `even before`, it emphasizes that an action or event occurs earlier than usual or expected, adding a sense of surprise or admiration. For example:
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e026c053f9c362a1983e.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e026c053f9c362a1983e.md
index 1d30c137d79..324c6f5b30d 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e026c053f9c362a1983e.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e026c053f9c362a1983e.md
@@ -20,7 +20,7 @@ Listen to James's statement and identify the use of the verb with `-ing`.
 ## --sentence--
 
 `I can't imagine _ so productive even before _ to work!`
- 
+
 ## --blanks--
 
 `being`
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e0adbee371c3ac455a01.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e0adbee371c3ac455a01.md
index 2e70ba6566c..eaa187bc198 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e0adbee371c3ac455a01.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e0adbee371c3ac455a01.md
@@ -13,10 +13,9 @@ James: I can't imagine being so productive even before coming to work! Thanks fo
 
 # --description--
 
-You probably remember that `I'll` is the contracted form of `I will`, a modal verb used to express future intentions, decisions, or plans made at the moment of speaking. For example:
+You probably remember that `I'll` is the contracted form of `I will`, a modal verb used to express future intentions, decisions, or plans made at the moment of speaking. 예시:
 
-`I'll call you tomorrow.` (future intention to call)
-`I'll take the bus to work.` (decision made about taking the bus)
+`I'll call you tomorrow.` (future intention to call) `I'll take the bus to work.` (decision made about taking the bus)
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e1ad953431c417763b3b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e1ad953431c417763b3b.md
index c2970da1ea9..9a96ecf41be 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e1ad953431c417763b3b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e1ad953431c417763b3b.md
@@ -13,11 +13,11 @@ Sarah: It's my pleasure. It's the consistency that helps me start the day on the
 
 # --description--
 
-The word `consistency` refers to the quality of always behaving or performing in a similar way, or of always happening in a similar way. It's often used to describe regular habits or behaviors. For example:
+The word `consistency` refers to the quality of always behaving or performing in a similar way, or of always happening in a similar way. It's often used to describe regular habits or behaviors. 예시:
 
 `Her consistency in studying every day led to great results.`
 
-The phrase `on the right foot` is an idiom meaning to start something in a positive or successful way. For example:
+The phrase `on the right foot` is an idiom meaning to start something in a positive or successful way. 예:
 
 `Starting the day with a healthy breakfast sets you on the right foot.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e2aca332a4c4c0359ed5.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e2aca332a4c4c0359ed5.md
index 20bbad55cc1..d9482f301c9 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e2aca332a4c4c0359ed5.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/6557e2aca332a4c4c0359ed5.md
@@ -13,7 +13,7 @@ James: Maybe I can get more productive in the morning as well.
 
 # --description--
 
-`As well` is a phrase used to add something to what has just been said, similar to `also` or `too`. It's often used to include something or someone else in an action or statement. For example:
+`As well` is a phrase used to add something to what has just been said, similar to `also` or `too`. It's often used to include something or someone else in an action or statement. 예시:
 
 `I'll have a coffee, and bring me a muffin as well.` (includes the muffin in addition to the coffee)
 
@@ -25,7 +25,7 @@ What does James mean in his sentence?
 
 ## --answers--
 
-He is certain about becoming more productive in the morning 
+He is certain about becoming more productive in the morning
 
 ### --feedback--
 
@@ -33,7 +33,7 @@ He is certain about becoming more productive in the morning
 
 ---
 
-He doesn't want to change his morning routine 
+He doesn't want to change his morning routine
 
 ### --feedback--
 
@@ -41,7 +41,7 @@ Using `maybe` and `as well` indicates considering a change to be more productive
 
 ---
 
-He will become less productive in the morning 
+He will become less productive in the morning
 
 ### --feedback--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a21f5512be1f7dbfe4cad.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a21f5512be1f7dbfe4cad.md
index 5fde1130cb5..2e74cb7372e 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a21f5512be1f7dbfe4cad.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a21f5512be1f7dbfe4cad.md
@@ -4,16 +4,16 @@ title: Task 36
 challengeType: 19
 dashedName: task-36
 ---
+
 # --description--
 
 Words ending in `y` often describe a state or quality. For example:
 
-If you add `y` to the noun `sleep`, you create the adjective `sleepy` which means feeling a need to sleep or being tired. 
+If you add `y` to the noun `sleep`, you create the adjective `sleepy` which means feeling a need to sleep or being tired.
 
 The `y` transforms the noun `sleep` into an adjective describing a condition. Similarly:
 
-`snow` + `y` = `snowy` (having a lot of snow)
-`rain` + `y` = `rainy` (having a lot of rain)
+`snow` + `y` = `snowy` (having a lot of snow) `rain` + `y` = `rainy` (having a lot of rain)
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a235215bab7fa2a2e4bb7.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a235215bab7fa2a2e4bb7.md
index 470079d2949..a232871826a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a235215bab7fa2a2e4bb7.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a235215bab7fa2a2e4bb7.md
@@ -4,14 +4,14 @@ title: Task 37
 challengeType: 19
 dashedName: task-37
 ---
+
 # --description--
 
 The `y` ending can also turn nouns into adjectives that describe a characteristic or quality.
 
 `Healthy` comes from the noun `health` and means having or showing good health. Like `sleepy`, the `y` changes the noun into an adjective. Other examples:
 
-`Wealthy` (having a lot of wealth)
-`Cloudy` (full of or covered with clouds)
+`Wealthy` (having a lot of wealth) `Cloudy` (full of or covered with clouds)
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a2a597d94f7fcc2f6126e.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a2a597d94f7fcc2f6126e.md
index 7422c9f4246..a7f45764b78 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a2a597d94f7fcc2f6126e.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a2a597d94f7fcc2f6126e.md
@@ -7,9 +7,9 @@ dashedName: task-40
 
 # --description--
 
-The expression `hit the snooze button` refers to the action of delaying the alarm clock to sleep a little longer. 
+The expression `hit the snooze button` refers to the action of delaying the alarm clock to sleep a little longer.
 
-The verb `hit` in this context means to press, and `snooze button` is a feature on alarm clocks that allows for a brief delay in the alarm. 
+The verb `hit` in this context means to press, and `snooze button` is a feature on alarm clocks that allows for a brief delay in the alarm.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a33bb8f2009ff7a7abfaa.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a33bb8f2009ff7a7abfaa.md
index a76813987d9..2450210fe90 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a33bb8f2009ff7a7abfaa.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a33bb8f2009ff7a7abfaa.md
@@ -13,15 +13,13 @@ Expert: Absolutely! My first suggestion is: don't hit the snooze button multiple
 
 # --description--
 
-There's a difference between `may be` and `maybe`. Let's take a closer look. 
+There's a difference between `may be` and `maybe`. Let's take a closer look.
 
-`May` on its own also suggests possibility or permission. `May be` suggests a possibility or potentiality. 
+`May` on its own also suggests possibility or permission. `May be` suggests a possibility or potentiality.
 
-`Maybe` is an adverb indicating uncertainty or possibility. For example:
+`Maybe` is an adverb indicating uncertainty or possibility. 예:
 
-`It may be raining outside.` (suggests a possibility of rain)
-`Maybe I will go out later.` (expresses uncertainty about going out)
-`May I ask a question?` (Asks for the permission to speak)
+`It may be raining outside.` (suggests a possibility of rain) `Maybe I will go out later.` (expresses uncertainty about going out) `May I ask a question?` (Asks for the permission to speak)
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a3470e882d10004441cf3.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a3470e882d10004441cf3.md
index 5dd09300aa6..b74604a113d 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a3470e882d10004441cf3.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a3470e882d10004441cf3.md
@@ -13,7 +13,7 @@ Expert: Absolutely! My first suggestion is: don't hit the snooze button multiple
 
 # --description--
 
-The word `tempting` is an adjective that describes something appealing or attractive, often making someone want to do or have it. For example:
+The word `tempting` is an adjective that describes something appealing or attractive, often making someone want to do or have it. 예시:
 
 `The idea of sleeping in is tempting` (suggests the idea is appealing)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a35731cb3fc0152ebcf60.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a35731cb3fc0152ebcf60.md
index 23b52e69aaf..0ce7c7bb8c3 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a35731cb3fc0152ebcf60.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a35731cb3fc0152ebcf60.md
@@ -7,10 +7,9 @@ dashedName: task-44
 
 # --description--
 
-`To disrupt` is a verb that means to interrupt or prevent something from continuing in its usual way. For example:
-`Loud noises disrupt my concentration` (interrupts the concentration)
+`To disrupt` is a verb that means to interrupt or prevent something from continuing in its usual way. For example: `Loud noises disrupt my concentration` (interrupts the concentration)
 
-The term `sleep cycle` refers to the natural pattern of sleep, including different stages the body goes through while sleeping. For example:
+The term `sleep cycle` refers to the natural pattern of sleep, including different stages the body goes through while sleeping. 예시:
 
 `A good sleep cycle is vital for restful sleep` (refers to a healthy pattern of sleep)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a367638e3f401eb0235ea.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a367638e3f401eb0235ea.md
index e89828d10eb..e66fc94209d 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a367638e3f401eb0235ea.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a367638e3f401eb0235ea.md
@@ -7,8 +7,7 @@ dashedName: task-45
 
 # --description--
 
-`Feel groggy` is an informal term that means to feel weak, tired, or not fully awake, often as a result of poor sleep or waking up suddenly. 
-For example:
+`Feel groggy` is an informal term that means to feel weak, tired, or not fully awake, often as a result of poor sleep or waking up suddenly. For example:
 
 `I feel groggy if I don't get enough sleep` (describes feeling tired due to lack of sleep)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a3789069fc902eb2aaa4b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a3789069fc902eb2aaa4b.md
index 72b61eeac7b..150d7063e7a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a3789069fc902eb2aaa4b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a3789069fc902eb2aaa4b.md
@@ -13,7 +13,7 @@ Set up one alarm and get up when it rings
 
 # --description--
 
-The verb `to ring` refers to the action of making a sound, particularly a clear resonant sound. It's commonly used to describe the sound made by bells, telephones, or alarms. For example:
+The verb `to ring` refers to the action of making a sound, particularly a clear resonant sound. It's commonly used to describe the sound made by bells, telephones, or alarms. 예시:
 
 `The phone will ring at 9 AM to remind me of the meeting.` (indicates the phone making a sound)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a39242197c9040ddedef2.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a39242197c9040ddedef2.md
index 31688b5cd3d..0bd2e3aab76 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a39242197c9040ddedef2.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a39242197c9040ddedef2.md
@@ -13,7 +13,7 @@ Expert: Absolutely! My first suggestion is: don't hit the snooze button multiple
 
 # --description--
 
-The imperative form is used to give orders, instructions, or advice. It often starts with a verb in the base form for positive commands, or with `don't` for negative commands. Understanding this form is important for following or giving instructions. For example:
+The imperative form is used to give orders, instructions, or advice. It often starts with a verb in the base form for positive commands, or with `don't` for negative commands. Understanding this form is important for following or giving instructions. 예시:
 
 `Drink plenty of water` (positive command)
 
@@ -39,7 +39,7 @@ Used here for a negative command, advising against an action. Don't use capital
 
 ### --feedback--
 
-Base form of the verb used for giving a positive command. This word is capitalized. 
+Base form of the verb used for giving a positive command. This word is capitalized.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a3b8981a93f05bbfea7ba.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a3b8981a93f05bbfea7ba.md
index a64a9efbce3..9fc87e7d152 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a3b8981a93f05bbfea7ba.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a3b8981a93f05bbfea7ba.md
@@ -12,7 +12,7 @@ Expert: Another thing: don't skip breakfast. Breakfast gives you the energy to s
 -->
 # --description--
 
-The verb `to skip` means to not do or not include something that you usually do or that should be done. 
+The verb `to skip` means to not do or not include something that you usually do or that should be done.
 
 `Compensate` means to make up for something that is missed or lacking. It's often used to describe actions taken to balance out an absence or deficiency. For example:
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a497a3afaf10b336746a5.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a497a3afaf10b336746a5.md
index 568487483c3..4da1595ce6d 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a497a3afaf10b336746a5.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a497a3afaf10b336746a5.md
@@ -12,7 +12,7 @@ Expert: Another thing: don't skip breakfast. Breakfast gives you the energy to s
 -->
 # --description--
 
-Conditional sentences often use the word `if` to describe a situation that will cause a particular result. They typically consist of two parts: the condition (the `if` part) and the result. For example:
+Conditional sentences often use the word `if` to describe a situation that will cause a particular result. They typically consist of two parts: the condition (the `if` part) and the result. 예시:
 
 `If you study hard, you will pass the exam.` (condition: studying hard; result: passing the exam)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a4a5af997350c187bd779.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a4a5af997350c187bd779.md
index 7c496bf61d0..46982c9046f 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a4a5af997350c187bd779.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a4a5af997350c187bd779.md
@@ -13,7 +13,7 @@ Sophie: I have a friend who does that in her routine. Any other suggestions?
 
 # --description--
 
-`Who` can be used as a relative pronoun to introduce a clause that gives more information about a person or people. It links a description or action specifically to a person. For example:
+`Who` can be used as a relative pronoun to introduce a clause that gives more information about a person or people. It links a description or action specifically to a person. 예시:
 
 `She is someone who always knows what to do.` (links the knowing what to do to the person)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a4e0c1176be0e1b785c96.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a4e0c1176be0e1b785c96.md
index de0ccd4c916..486d12d01e1 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a4e0c1176be0e1b785c96.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a4e0c1176be0e1b785c96.md
@@ -13,7 +13,7 @@ Expert: Yes, don't start your day checking your phone or emails immediately.
 
 # --description--
 
-The adverb `immediately` means without delay or right away. It's used to emphasize the urgency or the need to do something at once. For example:
+The adverb `immediately` means without delay or right away. It's used to emphasize the urgency or the need to do something at once. 예시:
 
 `This issue has to be fixed immediately.` (do it right away without delay)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a4fc35818d90f73f63ba0.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a4fc35818d90f73f63ba0.md
index 960da153bab..da04cdb0be8 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a4fc35818d90f73f63ba0.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a4fc35818d90f73f63ba0.md
@@ -13,7 +13,7 @@ Expert: Yes, don't start your day checking your phone or emails immediately. It
 
 # --description--
 
-The verb `to rush` means to do something or move quickly or in a hurry, often due to time pressure. It's used to describe actions done with urgency. For example:
+The verb `to rush` means to do something or move quickly or in a hurry, often due to time pressure. It's used to describe actions done with urgency. 예시:
 
 `I had to rush to catch the train.` (means moving quickly to not miss the train)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a505171c360103cf718f9.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a505171c360103cf718f9.md
index 666051e4b1f..1f95e8b75ca 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a505171c360103cf718f9.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a505171c360103cf718f9.md
@@ -13,7 +13,7 @@ It creates stress and makes you have the sensation that you have to rush. Take a
 
 # --description--
 
-Reflexive pronouns like `yourself` are used when the subject of the sentence is also the object.They are often used for actions that people do to or for themselves. For example:
+Reflexive pronouns like `yourself` are used when the subject of the sentence is also the object.They are often used for actions that people do to or for themselves. 예시:
 
 `You should treat yourself to a day off` (the action of treating is done by and for the person themselves)
 
@@ -25,7 +25,7 @@ What does the expert mean by `Take a few minutes for yourself`?
 
 ## --answers--
 
-Take a few minutes to help others 
+Take a few minutes to help others
 
 ### --feedback--
 
@@ -37,7 +37,7 @@ Spend some time doing something beneficial for your own well-being
 
 ---
 
-Quickly check your emails in the morning 
+Quickly check your emails in the morning
 
 ### --feedback--
 
@@ -45,7 +45,7 @@ The expert advises against immediately checking emails and suggests spending tim
 
 ---
 
-Rush through your morning routine 
+Rush through your morning routine
 
 ### --feedback--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a51cff12fb7117aa611f9.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a51cff12fb7117aa611f9.md
index 25415e21ecd..b4cf1bfcea9 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a51cff12fb7117aa611f9.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a51cff12fb7117aa611f9.md
@@ -13,7 +13,7 @@ Expert: Take a few minutes for yourself. For example, you can stretch or do some
 
 # --description--
 
-`Breathing exercises` are practices where you consciously control your breathing pattern. They are often used for relaxation, stress management, and to `clear your mind` – which means to free your mind from stress or worry. For example:
+`Breathing exercises` are practices where you consciously control your breathing pattern. They are often used for relaxation, stress management, and to `clear your mind` – which means to free your mind from stress or worry. 예시:
 
 `Deep breathing helps to calm your nerves.` (uses controlled breathing for relaxation)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a54506b259313b2d59577.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a54506b259313b2d59577.md
index acee35d37e1..95892d84a7c 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a54506b259313b2d59577.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a54506b259313b2d59577.md
@@ -13,7 +13,7 @@ If you start the day feeling relaxed, you may have a more productive day.
 
 # --description--
 
-Conditional sentences often use `if` to describe a situation (cause) that will lead to a particular result (consequence). They typically consist of two parts: the `if` clause (condition) and the main clause (result). For example:
+Conditional sentences often use `if` to describe a situation (cause) that will lead to a particular result (consequence). They typically consist of two parts: the `if` clause (condition) and the main clause (result). 예시:
 
 `If you sleep well, you will feel refreshed.` (condition: sleeping well; result: feeling refreshed)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a5630b68570156ea7d80e.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a5630b68570156ea7d80e.md
index 6507c75e0f3..e9d47fc284a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a5630b68570156ea7d80e.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a5630b68570156ea7d80e.md
@@ -13,8 +13,7 @@ Expert: You're welcome! And remember: the small changes make a big difference. Y
 
 # --description--
 
-The phrase `small changes make a big difference` means that even minor adjustments in behavior or habits can have a significant impact.
-This expression is often used to encourage continuous improvements. 
+The phrase `small changes make a big difference` means that even minor adjustments in behavior or habits can have a significant impact. This expression is often used to encourage continuous improvements.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a5bfadf47e1199f9b65eb.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a5bfadf47e1199f9b65eb.md
index 7551b5e5af3..3f858ad1c75 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a5bfadf47e1199f9b65eb.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a5bfadf47e1199f9b65eb.md
@@ -13,15 +13,13 @@ Jake: Hey Sarah. Sophie said you have very good tips for a great morning.
 
 # --description--
 
-Past tense verbs are used to talk about actions that happened in the past. Some verbs change their form in the past tense, like `say` to `said`. For example:
+Past tense verbs are used to talk about actions that happened in the past. Some verbs change their form in the past tense, like `say` to `said`. 예시:
 
-`Yesterday, she said she would join us` (Past tense of `say`)
-`He said the meeting was at noon` (Describes a past statement about the meeting time)
+`Yesterday, she said she would join us` (Past tense of `say`) `He said the meeting was at noon` (Describes a past statement about the meeting time)
 
-Another example of irregular verb is `tell`, which becomes `told` in the past tense. For example:
+Another example of irregular verb is `tell`, which becomes `told` in the past tense. 예:
 
-`He told me about the plan last week` (Past tense of `tell`)
-`Last night, they told stories about our last project` (Using `told` to describe a past action)
+`He told me about the plan last week` (Past tense of `tell`) `Last night, they told stories about our last project` (Using `told` to describe a past action)
 
 Don't worry if irregular verbs seem tricky; with practice, you'll get the hang of them!
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a79e595bd202b4cd5e2d2.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a79e595bd202b4cd5e2d2.md
index 4854fad9570..d51c90b1987 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a79e595bd202b4cd5e2d2.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a79e595bd202b4cd5e2d2.md
@@ -13,10 +13,9 @@ Jake: Do you have any ideas that could help?
 
 # --description--
 
-The modal verb `could` is often used to politely ask for help or suggestions. For example:
+The modal verb `could` is often used to politely ask for help or suggestions. 예시:
 
-`Could you show me how to do this?` (asking for help in a polite way)
-`What could I do to improve my skills?` (asking for suggestions)
+`Could you show me how to do this?` (asking for help in a polite way) `What could I do to improve my skills?` (asking for suggestions)
 
 Understanding how to use `could` is important to create polite requests or questions.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a7c5211e5252cf8a4ed01.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a7c5211e5252cf8a4ed01.md
index e38691b55f2..c2ef936e80b 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a7c5211e5252cf8a4ed01.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a7c5211e5252cf8a4ed01.md
@@ -13,7 +13,7 @@ Sarah: I totally understand, Jake. It can be tough. Let's see if we can have som
 
 # --description--
 
-The modal verb `can` is used to express ability, possibility, or to ask permission. It's a versatile verb that's commonly used in everyday conversation. For example:
+The modal verb `can` is used to express ability, possibility, or to ask permission. It's a versatile verb that's commonly used in everyday conversation. 예시:
 
 `I can speak three languages` (ability)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a7d752ffc542e5874af0b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a7d752ffc542e5874af0b.md
index 81bef31dd28..27292aa96ce 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a7d752ffc542e5874af0b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a7d752ffc542e5874af0b.md
@@ -14,17 +14,15 @@ Jake: Do you have any ideas that could help?
 
 # --description--
 
-Understanding the difference between `can` and `could` is crucial in English. 
+Understanding the difference between `can` and `could` is crucial in English.
 
 `Can` is used to express ability, possibility, or to ask permission in the present or future.
 
-`Could` is often used for polite requests, suggestions, or to talk about ability in the past. For example:
+`Could` is often used for polite requests, suggestions, or to talk about ability in the past. 예:
 
-`I can code very well` (present ability)
-`Can I leave early today?` (asking for permission)
+`I can code very well` (present ability) `Can I leave early today?` (asking for permission)
 
-`Could you pass me that tool, please?` (polite request)
-`When I first learned programming, I could spend hours debugging without getting tired` (past ability)
+`Could you pass me that tool, please?` (polite request) `When I first learned programming, I could spend hours debugging without getting tired` (past ability)
 # --question--
 
 ## --text--
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a896f31ca6a32913d1106.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a896f31ca6a32913d1106.md
index f9b5e5df9d4..83d76ada354 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a896f31ca6a32913d1106.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a896f31ca6a32913d1106.md
@@ -13,8 +13,7 @@ Sarah: You can start by involving your kids in light activities. Go for a family
 
 # --description--
 
-The words you use in a sentence can make a big difference in modulating the message it delivers. 
-Let's look at some examples to understand this better.
+The words you use in a sentence can make a big difference in modulating the message it delivers. Let's look at some examples to understand this better.
 
 Prepositions like `by` affect the verb that comes after, When you use `by`, it often needs the verb to end with `-ing`. Here's an example:
 
@@ -26,8 +25,7 @@ Adjectives can also change the meaning of the following word by adding details t
 
 Even words like `family` and `outdoor` can be used as adjectives, they describe the noun that follows them. For example:
 
-`Family activities bring everyone together.` (`family` describes the type of activities)
-`Outdoor sports are enjoyable in good weather.` (`outdoor` describes where the sports happen)
+`Family activities bring everyone together.` (`family` describes the type of activities) `Outdoor sports are enjoyable in good weather.` (`outdoor` describes where the sports happen)
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a8b62e5681235c3fb5492.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a8b62e5681235c3fb5492.md
index 5c57e62ea23..268a55158dd 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a8b62e5681235c3fb5492.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a8b62e5681235c3fb5492.md
@@ -13,7 +13,7 @@ Jake: Good idea! After dinner, I usually help them with their homework.
 
 # --description--
 
-Let's review the usage of `them` and `their`. `Them` is used to refer to multiple people previously mentioned, and `their` shows possession or belonging to these people. For example:
+Let's review the usage of `them` and `their`. `Them` is used to refer to multiple people previously mentioned, and `their` shows possession or belonging to these people. 예시:
 
 `I saw the kids. I gave them their toys.` (`them` refers to the kids; `their` shows the toys belong to the kids)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a8c9d2a0ea136a0fd3631.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a8c9d2a0ea136a0fd3631.md
index 1eb6cbc8292..8df521fa3a1 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a8c9d2a0ea136a0fd3631.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a8c9d2a0ea136a0fd3631.md
@@ -13,7 +13,7 @@ Sarah: That's important. While they do homework, use the time to stretch or rela
 
 # --description--
 
-`While` is used in sentences to indicate that two actions or events are happening at the same time. It often sets the scene for one action that occurs during the time another action is taking place. For example:
+`While` is used in sentences to indicate that two actions or events are happening at the same time. It often sets the scene for one action that occurs during the time another action is taking place. 예시:
 
 `While I cook, I listen to music` (I listen to music at the same time as I am cooking)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a8d7c939fcf37604516e4.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a8d7c939fcf37604516e4.md
index 360928e78fe..48a29a383ba 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a8d7c939fcf37604516e4.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a8d7c939fcf37604516e4.md
@@ -15,7 +15,7 @@ Sarah: Keep a consistent bedtime routine for your kids. Read them a bedtime stor
 
 # --description--
 
-`Bedtime` refers to the time at which someone usually goes to bed. It's often associated with routines that help people, especially children, prepare for sleep. For example:
+`Bedtime` refers to the time at which someone usually goes to bed. It's often associated with routines that help people, especially children, prepare for sleep. 예시:
 
 `Their bedtime is at 8 PM, and they always read for a few minutes before turning off the lights.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a9a4cef8a173b8c27fc84.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a9a4cef8a173b8c27fc84.md
index b3518664c40..c42ccf81b8a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a9a4cef8a173b8c27fc84.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a9a4cef8a173b8c27fc84.md
@@ -17,7 +17,7 @@ Sarah: Anytime, Jake.
 
 # --description--
 
-`Asleep` is an adjective that describes someone being in a state of sleep. For example:
+`Asleep` is an adjective that describes someone being in a state of sleep. 예시:
 
 `The children usually are asleep by 9 PM`. (indicates that the children usually are sleeping at that time)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a9d161bf4cf51369ff1e0.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a9d161bf4cf51369ff1e0.md
index 40885d3511c..3c5548042a7 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a9d161bf4cf51369ff1e0.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a9d161bf4cf51369ff1e0.md
@@ -13,7 +13,7 @@ AUDIO REFERENCE:
 
 # --description--
 
-This challenge tests your understanding of some key concepts from the dialogue between Jake and Sarah about evening routines. 
+This challenge tests your understanding of some key concepts from the dialogue between Jake and Sarah about evening routines.
 
 # --fillInTheBlank--
 
@@ -51,7 +51,7 @@ Indicates regularity and uniformity in bedtime routines.
 
 ### --feedback--
 
-Used in sentences to indicate that two actions or events are happening at the same time. 
+Used in sentences to indicate that two actions or events are happening at the same time.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a9f8d6d3af8538a178166.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a9f8d6d3af8538a178166.md
index 13a733fb875..555b1085db6 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a9f8d6d3af8538a178166.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655a9f8d6d3af8538a178166.md
@@ -5,6 +5,7 @@ title: "Dialogue 4: Brian and Maria Talk About Eventful Evenings"
 challengeType: 21
 dashedName: dialogue-brian-and-maria-talk-about-eventful-evenings
 ---
+
 # --description--
 
 Watch the video above to understand the context of the upcoming lessons.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b283d10fee46040e0a893.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b283d10fee46040e0a893.md
index 07cfff5325b..47f59af8419 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b283d10fee46040e0a893.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b283d10fee46040e0a893.md
@@ -35,7 +35,7 @@ She has dance classes on Tuesdays
 
 ### --feedback--
 
-Maria's dance classes are on Mondays. 
+Maria's dance classes are on Mondays.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b2b5cc4ea3062f9811dec.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b2b5cc4ea3062f9811dec.md
index cb06d71d95f..897f8bd2ffa 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b2b5cc4ea3062f9811dec.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b2b5cc4ea3062f9811dec.md
@@ -16,7 +16,7 @@ A `night owl` is someone who stays up late. For example: `He's a night owl, ofte
 
 `Hang out` means to spend time relaxing or socializing. For example: `We hang out at the park on weekends` (spending leisure time)
 
-`Be back` means to return, and `tops` is used informally to indicate the maximum amount or time. For example: 
+`Be back` means to return, and `tops` is used informally to indicate the maximum amount or time. 예:
 
 `I'll be back by dinner` (returning before a specific time)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b2d250741166530dd6e43.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b2d250741166530dd6e43.md
index bb4757722ff..697b957d181 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b2d250741166530dd6e43.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b2d250741166530dd6e43.md
@@ -13,7 +13,7 @@ Brian: So many activities! I don't think I could keep the pace.
 
 # --description--
 
-`Keep the pace` means to maintain the same level of activity or progress as someone else or as per a set standard. It's often used to talk about matching speed or staying on par with others. For example:
+`Keep the pace` means to maintain the same level of activity or progress as someone else or as per a set standard. It's often used to talk about matching speed or staying on par with others. 예시:
 
 `It's hard to keep the pace with the advanced runners in the group.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b3197bb31ca670081f6d7.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b3197bb31ca670081f6d7.md
index 53acc11bffd..dedc2cefde8 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b3197bb31ca670081f6d7.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b3197bb31ca670081f6d7.md
@@ -15,11 +15,11 @@ Brian: So many activities! I don't think I could keep the pace. But it is nice t
 
 You can create adjectives that express the highest degree of something. These are the superlative adjectives. They show that nothing else can exceed a certain level. The general rule is:
 
-Short adjectives: create a superlative by ending `-est` at the end of the word. 
+Short adjectives: create a superlative by ending `-est` at the end of the word.
 
 `She enjoys the fullest her weekdays` (`the` + `full` + `est`)
 
-Long adjectives: Just add `the most` before the adjective. 
+Long adjectives: Just add `the most` before the adjective.
 
 `This is the most interesting book I've read.` (`the most` + `interesting`)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b34e53bf2cb6908042c98.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b34e53bf2cb6908042c98.md
index 339f65f3be1..36d3de435b1 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b34e53bf2cb6908042c98.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b34e53bf2cb6908042c98.md
@@ -13,7 +13,7 @@ Sophie: Hey Brian. TGIF, right? Do you have any plans for the weekend?
 
 # --description--
 
-`TGIF` stands for `Thank God It's Friday`, a common expression used to express happiness that the work week is ending and the weekend is near. 
+`TGIF` stands for `Thank God It's Friday`, a common expression used to express happiness that the work week is ending and the weekend is near.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b3581926acd6a172fa94b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b3581926acd6a172fa94b.md
index 942348dbf80..4da90bcb3a1 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b3581926acd6a172fa94b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b3581926acd6a172fa94b.md
@@ -27,7 +27,7 @@ What time does he start his day?
 
 ### --feedback--
 
-Brian doesn't mention 8:00 AM. 
+Brian doesn't mention 8:00 AM.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b39e59c29d16d64a2ce8e.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b39e59c29d16d64a2ce8e.md
index afffc1ba0e1..b6ef98c6a27 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b39e59c29d16d64a2ce8e.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/655b39e59c29d16d64a2ce8e.md
@@ -13,12 +13,11 @@ Sophie: It is a good mix of indoor and outdoor activities! I don't work at the c
 
 # --description--
 
-`Indoor` refers to activities done inside a building, while `outdoor` means activities done outside. For example:
+`Indoor` refers to activities done inside a building, while `outdoor` means activities done outside. 예시:
 
-`Indoor activities include reading and cooking.`
-`Outdoor activities involve hiking and gardening.`
+`Indoor activities include reading and cooking.` `Outdoor activities involve hiking and gardening.`
 
-`I suppose` is used to express a mild assumption or agreement. For example:
+`I suppose` is used to express a mild assumption or agreement. 예:
 
 `I suppose we could meet tomorrow.` (mild agreement or suggestion)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/657a45a85a8f6cfeef7803db.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/657a45a85a8f6cfeef7803db.md
index ada406e62f0..9274ba2f41d 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/657a45a85a8f6cfeef7803db.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-discuss-your-morning-or-evening-routine/657a45a85a8f6cfeef7803db.md
@@ -13,7 +13,7 @@ Entire Audio
 
 # --description--
 
-This challenge tests your understanding of key concepts from the dialogue about weekend routines between Sophie and Brian. 
+This challenge tests your understanding of key concepts from the dialogue about weekend routines between Sophie and Brian.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e005227c77535223f3062.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e005227c77535223f3062.md
index 0e47212eb02..fc07204ec27 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e005227c77535223f3062.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e005227c77535223f3062.md
@@ -12,8 +12,8 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 When talking about a typical day, especially in a professional context, we often use the present simple tense to describe regular activities or routines. Words like `routine`, `typical`, and `workday` are commonly used in this context.
 
-- `Routine` refers to the regular way of doing things in a particular order. For example, `My morning routine includes jogging and reading the news.` 
-- `Typical` means what is normal or usual. For example, `A typical day at work involves meetings and writing reports.` 
+- `Routine` refers to the regular way of doing things in a particular order. For example, `My morning routine includes jogging and reading the news.`
+- `Typical` means what is normal or usual. For example, `A typical day at work involves meetings and writing reports.`
 - `Workday` refers to the day or hours during which you work. For example, `My workday starts at 9 AM and ends at 5 PM.`
 
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e05f30925c93d93c03fe3.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e05f30925c93d93c03fe3.md
index e1b7aee1fae..f9b55560246 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e05f30925c93d93c03fe3.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e05f30925c93d93c03fe3.md
@@ -9,8 +9,7 @@ dashedName: task-3
 
 `AM` and `PM` are used to tell time during the day. `AM` means the time from midnight to noon (for example, `8:00 AM` is in the morning). `PM` means the time from noon to midnight (for example, `6:00 PM` is in the evening).
 
-In English, the day is divided into two periods using `AM` and `PM`. 
-`AM` stands for `Ante Meridiem`, which is Latin for `before midday`. It refers to the time from midnight (`12:00 AM`) to noon (`12:00 PM`). So, when you say `9:00 AM`, it means 9 in the morning.
+In English, the day is divided into two periods using `AM` and `PM`. `AM` stands for `Ante Meridiem`, which is Latin for `before midday`. It refers to the time from midnight (`12:00 AM`) to noon (`12:00 PM`). So, when you say `9:00 AM`, it means 9 in the morning.
 
 `PM` stands for `Post Meridiem`, which is Latin for `after midday`. It refers to the time from noon (`12:00 PM`) to just before midnight (`11:59 PM`). So, when we say `3:00 PM`, it means 3 in the afternoon.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e067b7581045341f106d8.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e067b7581045341f106d8.md
index 07ea24460be..587b60c7219 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e067b7581045341f106d8.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e067b7581045341f106d8.md
@@ -12,7 +12,7 @@ Brian: Hi Tom! Well, my day usually starts at 8:30 AM. I check my emails and rep
 
 # --description--
 
-Pay attention to the audio and answer the question. 
+Pay attention to the audio and answer the question.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e06eca8147f561619be7d.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e06eca8147f561619be7d.md
index 46bad817181..d77d9509374 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e06eca8147f561619be7d.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e06eca8147f561619be7d.md
@@ -12,7 +12,7 @@ Brian: Hi Tom! Well, my day usually starts at 8:30 AM. I check my emails and rep
 
 # --description--
 
-In this part of the dialogue, Brian talks about his morning activities. 
+In this part of the dialogue, Brian talks about his morning activities.
 
 The use of time expressions like `usually` and specific times like `8:30 AM` help to give more details about the routine.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e07580285f658d1f98cfe.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e07580285f658d1f98cfe.md
index 5bc1541a196..56d9c32422b 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e07580285f658d1f98cfe.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e07580285f658d1f98cfe.md
@@ -8,7 +8,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-In conversations about daily routines, understanding the sequence of activities is important. 
+In conversations about daily routines, understanding the sequence of activities is important.
 
 The phrase `after that` is used to indicate the next action following a previous one. It helps in understanding the order in which things are done.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e07a2fdda8d5ac93d415e.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e07a2fdda8d5ac93d415e.md
index 7dd9444636d..44ed356e142 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e07a2fdda8d5ac93d415e.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e07a2fdda8d5ac93d415e.md
@@ -10,11 +10,11 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-In English, you can use words like `then` to talk about the order in which things happen. 
+In English, you can use words like `then` to talk about the order in which things happen.
 
-`Then` is often used to indicate the next step or action after something else has been done. 
+`Then` is often used to indicate the next step or action after something else has been done.
 
-For example, `First, I check my emails, then I start coding.` 
+For example, `First, I check my emails, then I start coding.`
 
 This helps people to understand how a series of actions or events are connected in time.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e0868da73165e32763679.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e0868da73165e32763679.md
index 1ae1d220985..0905e842fb6 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e0868da73165e32763679.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e0868da73165e32763679.md
@@ -8,8 +8,7 @@ audioPath: Add the path to the audio file here. Or, delete this if you don't hav
 
 # --description--
 
-The word `most` is used to describe the highest degree or largest part of something. It's often used when comparing three or more things or situations. 
-For example, if you have three tasks - Task A, Task B, and Task C, and Task A takes more time than the others, you can say, `Task A takes the most time.`
+The word `most` is used to describe the highest degree or largest part of something. It's often used when comparing three or more things or situations. For example, if you have three tasks - Task A, Task B, and Task C, and Task A takes more time than the others, you can say, `Task A takes the most time.`
 
 Or in the sentence `I spend most of my time coding`, `most` indicates that coding takes up the largest part of the time compared to other activities.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e0eaff0dab975c4be3099.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e0eaff0dab975c4be3099.md
index cb14e5ddef8..6761e56ddf8 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e0eaff0dab975c4be3099.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e0eaff0dab975c4be3099.md
@@ -12,7 +12,7 @@ Tom: That makes sense. How do you handle your projects? -->
 
 # --description--
 
-In professional settings, it's common to discuss how tasks or projects are managed. 
+In professional settings, it's common to discuss how tasks or projects are managed.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e0f15eb5e5b77ce1a39c2.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e0f15eb5e5b77ce1a39c2.md
index fc1e27d2990..7af083af78a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e0f15eb5e5b77ce1a39c2.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e0f15eb5e5b77ce1a39c2.md
@@ -7,7 +7,7 @@ dashedName: task-13
 
 # --description--
 
-In project management, specific phrases are used to describe how tasks are handled. 
+In project management, specific phrases are used to describe how tasks are handled.
 
 `To break down` means dividing something into smaller, more manageable parts. For example: `When I work on a large project, I often break down the work into smaller sections.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e1bd636d5d3a7085a6876.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e1bd636d5d3a7085a6876.md
index 35b2019ae9c..42dc079dd86 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e1bd636d5d3a7085a6876.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e1bd636d5d3a7085a6876.md
@@ -10,7 +10,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-The verb `to bring` means to take something or someone with you to the place where you are going. 
+The verb `to bring` means to take something or someone with you to the place where you are going.
 
 For example, `I bring my phone to work every day.` It's often used when talking about taking items from one place to another.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e1c10bc3f2ea8e1c1d7f7.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e1c10bc3f2ea8e1c1d7f7.md
index 8243ebb7aba..3f6fd6058aa 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e1c10bc3f2ea8e1c1d7f7.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e1c10bc3f2ea8e1c1d7f7.md
@@ -8,7 +8,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-Understanding someone’s routine, like their lunch habits, involves paying attention to specific details in the conversation. 
+Understanding someone’s routine, like their lunch habits, involves paying attention to specific details in the conversation.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e1e51ad0db7b615666f27.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e1e51ad0db7b615666f27.md
index 58421687843..54ac61f96c1 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e1e51ad0db7b615666f27.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e1e51ad0db7b615666f27.md
@@ -10,7 +10,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-`Tip` often refers to advice or a suggestion that is helpful in a particular situation. 
+`Tip` often refers to advice or a suggestion that is helpful in a particular situation.
 
 For example, `Brian gave Tom some tips on time management` means Brian offered helpful advice about managing time more effectively.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e270fae538dd663360e65.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e270fae538dd663360e65.md
index 2966ccb9386..f600839874e 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e270fae538dd663360e65.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e270fae538dd663360e65.md
@@ -12,9 +12,9 @@ Anna: After that, you probably attend the daily team meeting at 9:30 AM. During
 
 # --description--
 
-`After that` is often used to indicate what comes next in a series of actions or events. For example:
+`After that` is often used to indicate what comes next in a series of actions or events. 예시:
 
-`I check my emails, and after that, I attend a meeting`, means that attending the meeting is the next activity you do following the checking of emails. 
+`I check my emails, and after that, I attend a meeting`, means that attending the meeting is the next activity you do following the checking of emails.
 
 `We have a team briefing first thing in the morning, and after that, we start our individual tasks.` Here, `first` and `after` help to understand the order of events.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e2a31c7f3e5e4a599a589.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e2a31c7f3e5e4a599a589.md
index 7676ccf32aa..469c41357be 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e2a31c7f3e5e4a599a589.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e2a31c7f3e5e4a599a589.md
@@ -13,7 +13,7 @@ Anna: You have a one-hour lunch break around noon every day. Bring your lunch or
 
 # --description--
 
-Understanding daily work activities and the frequency of these activities is key in professional settings. 
+Understanding daily work activities and the frequency of these activities is key in professional settings.
 
 For example, `I usually attend a team meeting in the morning,` means that attending the meeting is a regular part of the morning routine.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e307876468dff6e505438.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e307876468dff6e505438.md
index 4ab842e3f75..68e7b15ebf3 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e307876468dff6e505438.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e307876468dff6e505438.md
@@ -7,7 +7,7 @@ dashedName: task-42
 
 # --description--
 
-`How long` is frequently used to ask about the duration or time of an event or activity. 
+`How long` is frequently used to ask about the duration or time of an event or activity.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e358a40dd95143df6fe26.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e358a40dd95143df6fe26.md
index 0ab522fbb51..de2e75da851 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e358a40dd95143df6fe26.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e358a40dd95143df6fe26.md
@@ -10,11 +10,11 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-Understanding questions about job experiences involves knowing key phrases and their meanings. `How's` is an abbreviation for `how is,` commonly used in casual conversation. For example, `How's your day?` means `How is your day?` 
+Understanding questions about job experiences involves knowing key phrases and their meanings. `How's` is an abbreviation for `how is,` commonly used in casual conversation. For example, `How's your day?` means `How is your day?`
 
-`Security` refers to the practice of keeping people and places safe. In a sentence, you might say, `He works in security, protecting buildings.` 
+`Security` refers to the practice of keeping people and places safe. In a sentence, you might say, `He works in security, protecting buildings.`
 
-`To deal with` means to handle or manage something, especially challenges. For example, `She deals with client requests at her job.` 
+`To deal with` means to handle or manage something, especially challenges. For example, `She deals with client requests at her job.`
 
 `Danger` refers to the possibility of harm or risk. An example sentence could be, `Firefighters often face danger in their work.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e39bace982b283ed8cd3f.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e39bace982b283ed8cd3f.md
index 53bf5eb0a94..3d3198415b0 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e39bace982b283ed8cd3f.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e39bace982b283ed8cd3f.md
@@ -13,11 +13,9 @@ Jake: No, not that much. In the morning, I must check the security cameras and b
 
 # --description--
 
-The phrase `not that much` is used to indicate a small amount or degree, often in response to a question about quantity or frequency. 
-For example, `Do you travel for work?` – `Not that much.`
+The phrase `not that much` is used to indicate a small amount or degree, often in response to a question about quantity or frequency. For example, `Do you travel for work?` – `Not that much.`
 
-On the other hand, `at all times` means always or continuously, indicating something that happens without interruption. 
-For instance, `Security guards must be alert at all times.`
+On the other hand, `at all times` means always or continuously, indicating something that happens without interruption. For instance, `Security guards must be alert at all times.`
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3a47f9d60c2b0ab6ce73.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3a47f9d60c2b0ab6ce73.md
index 5db5c6aaaf0..02ad0c92e01 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3a47f9d60c2b0ab6ce73.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3a47f9d60c2b0ab6ce73.md
@@ -13,11 +13,9 @@ Jake: No, not that much. In the morning, I must check the security cameras and b
 
 # --description--
 
-`To be sure` is used to express certainty or confirmation about something. 
-For example, `I check the list twice to be sure I have everything.` 
+`To be sure` is used to express certainty or confirmation about something. For example, `I check the list twice to be sure I have everything.`
 
-`To work properly` means to function correctly or as expected. 
-Example: `It's important that all machines work properly for safety.`
+`To work properly` means to function correctly or as expected. Example: `It's important that all machines work properly for safety.`
 
 # --instructions--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ab81d30a72de2311284.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ab81d30a72de2311284.md
index 807a8421171..520fe6c659d 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ab81d30a72de2311284.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ab81d30a72de2311284.md
@@ -10,7 +10,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-`Entrances` are the places where you can enter a building or an area, while `exits` are where you can leave. These terms are important in security to control and monitor the movement of people. 
+`Entrances` are the places where you can enter a building or an area, while `exits` are where you can leave. These terms are important in security to control and monitor the movement of people.
 
 For instance, `The security guard monitors the main entrance to the office.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ba6795db234adf14c0a.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ba6795db234adf14c0a.md
index 0d13e1c79ca..1f736dee619 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ba6795db234adf14c0a.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ba6795db234adf14c0a.md
@@ -10,7 +10,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-
 
 # --description--
 
-Understanding job obligations involves knowing what tasks are required in a specific role. Words like `must` often indicate these essential duties. 
+Understanding job obligations involves knowing what tasks are required in a specific role. Words like `must` often indicate these essential duties.
 
 For example, `In my job, I must ensure customer safety` shows a key responsibility.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ccfae39363a313b2f6b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ccfae39363a313b2f6b.md
index 336b0e99065..d7ae023ed35 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ccfae39363a313b2f6b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ccfae39363a313b2f6b.md
@@ -7,7 +7,7 @@ dashedName: task-53
 
 # --description--
 
-`Have to` is used to express necessity or obligation, usually from external rules or requirements. 
+`Have to` is used to express necessity or obligation, usually from external rules or requirements.
 
 For example, `I have to attend the meeting at 2 PM` suggests a mandatory presence based on a schedule or expectation.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3dfda31b534042d06e39.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3dfda31b534042d06e39.md
index c47287897c9..2b274583fb3 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3dfda31b534042d06e39.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3dfda31b534042d06e39.md
@@ -7,7 +7,7 @@ dashedName: task-54
 
 # --description--
 
-`Must` and `have to` express obligation. `Must` is often used for strong personal or internal obligations, `have to` is more for external requirements or rules. 
+`Must` and `have to` express obligation. `Must` is often used for strong personal or internal obligations, `have to` is more for external requirements or rules.
 
 For example: `I must finish this report because it's important to me` vs. `I have to finish this report by 5 PM because my boss said so.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ef7d1c8f445c9d9f2cd.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ef7d1c8f445c9d9f2cd.md
index d8bc0ec3510..59f821e81ee 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ef7d1c8f445c9d9f2cd.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3ef7d1c8f445c9d9f2cd.md
@@ -13,7 +13,7 @@ Sophie: What a responsibility. What else do you do? -->
 
 # --description--
 
-Reacting to someone's statements in conversation often involves acknowledging their situation or feelings. Phrases like `What a responsibility` are used to show recognition of the importance of someone's duties. 
+Reacting to someone's statements in conversation often involves acknowledging their situation or feelings. Phrases like `What a responsibility` are used to show recognition of the importance of someone's duties.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3f7e50ac0549666b4b64.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3f7e50ac0549666b4b64.md
index e5852854ebf..441827c83a0 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3f7e50ac0549666b4b64.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3f7e50ac0549666b4b64.md
@@ -10,7 +10,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-The word `else` is used in questions to ask for additional information or to ask about other things beyond what has already been mentioned. 
+The word `else` is used in questions to ask for additional information or to ask about other things beyond what has already been mentioned.
 
 For example, `What else do you like to do?` asks for more hobbies or activities besides those already discussed.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3fd446b9544b77a2bc21.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3fd446b9544b77a2bc21.md
index e43a678d274..ef0f0a51dd3 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3fd446b9544b77a2bc21.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e3fd446b9544b77a2bc21.md
@@ -7,9 +7,9 @@ dashedName: task-57
 
 # --description--
 
-`Top condition` refers to being in the best possible state or quality, especially important for equipment in safety-critical roles. For example, `The fire extinguisher must be kept in top condition.` 
+`Top condition` refers to being in the best possible state or quality, especially important for equipment in safety-critical roles. For example, `The fire extinguisher must be kept in top condition.`
 
-`Emergencies` are serious, unexpected situations that require immediate action, like a fire or a medical crisis. `Emergencies` is the plural form of `emergency`. 
+`Emergencies` are serious, unexpected situations that require immediate action, like a fire or a medical crisis. `Emergencies` is the plural form of `emergency`.
 
 # --instructions--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e449348a16b62e1f8cac6.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e449348a16b62e1f8cac6.md
index edfecd78ec4..ac0fe928cb9 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e449348a16b62e1f8cac6.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e449348a16b62e1f8cac6.md
@@ -7,9 +7,9 @@ dashedName: task-61
 
 # --description--
 
-`Security sweeps` are detailed inspections or searches conducted in an area or building, usually for safety and security purposes. 
+`Security sweeps` are detailed inspections or searches conducted in an area or building, usually for safety and security purposes.
 
-They involve checking for any potential risks, unauthorized access, or dangerous items. 
+They involve checking for any potential risks, unauthorized access, or dangerous items.
 
 For example, `Security officers perform security sweeps to find any hidden dangers`.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e44fe476035667aab9114.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e44fe476035667aab9114.md
index 80000be5c13..df1bb096f0d 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e44fe476035667aab9114.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e44fe476035667aab9114.md
@@ -14,7 +14,7 @@ Jake: Yes, I must conduct security sweeps. It's essential to ensure everything i
 
 `To ensure` means to make certain that something will happen or is the case.Example: `We ensure safety by following the guidelines.`
 
-`To conduct` means to organize and carry out an activity or task. For example, `The manager conducts weekly meetings.` 
+`To conduct` means to organize and carry out an activity or task. For example, `The manager conducts weekly meetings.`
 
 # --instructions--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e45c723bc3d6aed2b5997.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e45c723bc3d6aed2b5997.md
index a669f543d39..4321c27de5b 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e45c723bc3d6aed2b5997.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e45c723bc3d6aed2b5997.md
@@ -7,7 +7,7 @@ dashedName: task-63
 
 # --description--
 
-`Essential` means something that is absolutely necessary or extremely important. Example: `Regular training is essential for team development`. 
+`Essential` means something that is absolutely necessary or extremely important. Example: `Regular training is essential for team development`.
 
 `Optional` refers to something you can choose. For example, `attending the social event is optional` implies it's a choice, not a requirement.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e48135e86b276b6e233b5.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e48135e86b276b6e233b5.md
index 9858ec35383..fcfd9a8804f 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e48135e86b276b6e233b5.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e48135e86b276b6e233b5.md
@@ -7,9 +7,9 @@ dashedName: task-65
 
 # --description--
 
-`To revoke` means to officially cancel or take back a decision, right, or permission. For example, `The administrator may revoke access if rules are broken.` 
+`To revoke` means to officially cancel or take back a decision, right, or permission. For example, `The administrator may revoke access if rules are broken.`
 
-`To issue` in this context means to provide or distribute something officially, like badges or permits. For example, `The office issues ID cards to all new employees.` 
+`To issue` in this context means to provide or distribute something officially, like badges or permits. For example, `The office issues ID cards to all new employees.`
 
 `Access control` refers to the practice of restricting and managing entry to a place or resource. For instance, `Access control systems are used to secure the building.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4a824ba68884c14f68b9.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4a824ba68884c14f68b9.md
index 60e027c302e..544b11695e6 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4a824ba68884c14f68b9.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4a824ba68884c14f68b9.md
@@ -10,7 +10,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-`Goes,` in the phrase `goes as expected,` refers to things happening in the way they are planned or anticipated, with `goes` being the third-person present form of `go.` 
+`Goes,` in the phrase `goes as expected,` refers to things happening in the way they are planned or anticipated, with `goes` being the third-person present form of `go.`
 
 For example, `The project goes as expected` means the project is proceeding according to plan.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4dfc07e48897111f235f.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4dfc07e48897111f235f.md
index 1dcf5e793bd..07af3c7eedb 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4dfc07e48897111f235f.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4dfc07e48897111f235f.md
@@ -7,7 +7,7 @@ dashedName: task-72
 
 # --description--
 
-`Rules` are specific guidelines or instructions that are meant to be followed. They are set to maintain order and ensure fair and proper conduct, especially in a professional setting. 
+`Rules` are specific guidelines or instructions that are meant to be followed. They are set to maintain order and ensure fair and proper conduct, especially in a professional setting.
 
 For example, `The office rules include being punctual and respectful to colleagues`.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4e482e3a38992b212c6f.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4e482e3a38992b212c6f.md
index e5b8bf1f3d0..a6c6ad6f943 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4e482e3a38992b212c6f.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4e482e3a38992b212c6f.md
@@ -7,7 +7,7 @@ dashedName: task-73
 
 # --description--
 
-A `policy` (or `policies` in plural) is a principle or rule to guide decisions and achieve rational outcomes. Policies are often adopted by an organization to guide employees. 
+A `policy` (or `policies` in plural) is a principle or rule to guide decisions and achieve rational outcomes. Policies are often adopted by an organization to guide employees.
 
 For instance, `The company’s privacy policy protects client information.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4ec6dd27af9cc16addea.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4ec6dd27af9cc16addea.md
index 43ca0138e8b..6bbf3d02e35 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4ec6dd27af9cc16addea.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4ec6dd27af9cc16addea.md
@@ -7,7 +7,7 @@ dashedName: task-74
 
 # --description--
 
-`Regulations` are official rules made by a government or authority. They are designed to control how something works or how people act, especially in businesses. 
+`Regulations` are official rules made by a government or authority. They are designed to control how something works or how people act, especially in businesses.
 
 Example: `Health and safety regulations ensure a safe workplace`.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4f2649f8669f7d78e0a5.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4f2649f8669f7d78e0a5.md
index 42256392318..e62fc36c737 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4f2649f8669f7d78e0a5.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4f2649f8669f7d78e0a5.md
@@ -7,8 +7,7 @@ dashedName: task-75
 
 # --description--
 
-An `industry` refers to a specific sector of the economy or a type of business activity. 
-Different industries have their own sets of rules, regulations, and practices. 
+An `industry` refers to a specific sector of the economy or a type of business activity. Different industries have their own sets of rules, regulations, and practices.
 
 For example, `The technology industry is known for rapid innovation`.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4fc397780aa2bc046ed7.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4fc397780aa2bc046ed7.md
index 5db3b049e48..fffffb500d6 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4fc397780aa2bc046ed7.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e4fc397780aa2bc046ed7.md
@@ -7,7 +7,7 @@ dashedName: task-76
 
 # --description--
 
-To `promote ethics` means to encourage and support moral principles and standards. 
+To `promote ethics` means to encourage and support moral principles and standards.
 
 For example: `The manager promotes ethics by enforcing transparent reporting`.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e50576597e0a65cd97e24.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e50576597e0a65cd97e24.md
index 547c0288927..a79f3e4d71c 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e50576597e0a65cd97e24.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e50576597e0a65cd97e24.md
@@ -10,7 +10,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-Asking for the meaning of a word you don't know is a common and important part of learning and communication. 
+Asking for the meaning of a word you don't know is a common and important part of learning and communication.
 
 You can ask this in different ways, like `What does [word] mean?`, `what is the meaning of [word]?` or `Can you tell me the meaning of [word]?`, where `word` is the word you are asking about.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e50dd1f6ff2a9873f9ff0.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e50dd1f6ff2a9873f9ff0.md
index feb0546a0a7..75487bf1086 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e50dd1f6ff2a9873f9ff0.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e50dd1f6ff2a9873f9ff0.md
@@ -7,7 +7,7 @@ dashedName: task-78
 
 # --description--
 
-`Compliance` means following rules and doing what is required in a job. It is about making sure we do things the right way. 
+`Compliance` means following rules and doing what is required in a job. It is about making sure we do things the right way.
 
 For example, `In our job, compliance with safety rules keeps everyone safe.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e53d4cbe247b9d039f2c2.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e53d4cbe247b9d039f2c2.md
index aca97ed7dda..e75a253106d 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e53d4cbe247b9d039f2c2.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e53d4cbe247b9d039f2c2.md
@@ -7,11 +7,11 @@ dashedName: task-82
 
 # --description--
 
-`Comply with` means to act according to a rule, order, or request. 
+`Comply with` means to act according to a rule, order, or request.
 
-Usually `comply` is followed by `with`. For example, `to comply with` indicates what needs to be followed. 
+Usually `comply` is followed by `with`. For example, `to comply with` indicates what needs to be followed.
 
-For example, `Companies must comply with environmental regulations` means businesses must follow rules about protecting the environment. 
+For example, `Companies must comply with environmental regulations` means businesses must follow rules about protecting the environment.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e5c7a5c7ef6ec6f39dc5e.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e5c7a5c7ef6ec6f39dc5e.md
index 4cbf8babd3c..2de0164717c 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e5c7a5c7ef6ec6f39dc5e.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e5c7a5c7ef6ec6f39dc5e.md
@@ -7,7 +7,7 @@ dashedName: task-98
 
 # --description--
 
-A `security breach` is when someone gets unauthorized access to a system or data. This can be a big problem in workplaces, especially when it involves private information. 
+A `security breach` is when someone gets unauthorized access to a system or data. This can be a big problem in workplaces, especially when it involves private information.
 
 For example: `A security breach occurred when an outsider accessed confidential files.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e6f8bfecef34627817aa6.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e6f8bfecef34627817aa6.md
index dfe11854534..a1a505180d7 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e6f8bfecef34627817aa6.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e6f8bfecef34627817aa6.md
@@ -7,7 +7,7 @@ dashedName: task-111
 
 # --description--
 
-`Challenging` means something that is difficult in a way that tests your ability or determination. When work is challenging, it requires effort, skill, or strong problem-solving. 
+`Challenging` means something that is difficult in a way that tests your ability or determination. When work is challenging, it requires effort, skill, or strong problem-solving.
 
 For instance, `Designing a new software can be challenging` means it takes a lot of effort and skill.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e704f452a044b427e96d2.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e704f452a044b427e96d2.md
index bea79aae4a6..2933a98da00 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e704f452a044b427e96d2.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e704f452a044b427e96d2.md
@@ -12,7 +12,7 @@ Sarah: Sometimes. Let me tell you how my week usually goes. -->
 
 # --description--
 
-Conversation about work involves understanding details about job roles, the nature of the work, and how people feel about their tasks. 
+Conversation about work involves understanding details about job roles, the nature of the work, and how people feel about their tasks.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e70aa0abc044d54937aa9.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e70aa0abc044d54937aa9.md
index 07e228a4c50..e921cbd6ace 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e70aa0abc044d54937aa9.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e70aa0abc044d54937aa9.md
@@ -13,10 +13,9 @@ Sarah: In the morning, I have breakfast at home and then head to the office at 8
 
 # --description--
 
-Understanding what people are saying is important. 
+Understanding what people are saying is important.
 
-Note: `Weekdays` refer to Monday, Tuesday, Wednesday, Thursday and Friday
-`Weekend` refers to Saturday and Sunday. 
+Note: `Weekdays` refer to Monday, Tuesday, Wednesday, Thursday and Friday `Weekend` refers to Saturday and Sunday.
 
 This exercise is a little different. You must listen to the audio and understand it first. After that, fill in the blanks with the correct words to complete the summary of Sarah's morning routine.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e7116e4db87501f898f79.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e7116e4db87501f898f79.md
index 10ee4b616b7..0ef4a94f680 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e7116e4db87501f898f79.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e7116e4db87501f898f79.md
@@ -15,7 +15,7 @@ Sarah: In the morning, I have breakfast at home and then head to the office at 8
 
 In this exercise, focus on verb conjugation in the third person when describing someone else's routine.
 
-Note: to `head to` means to go or move towards a place. 
+Note: to `head to` means to go or move towards a place.
 
 # --instructions--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e741a7309f661e0a48909.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e741a7309f661e0a48909.md
index dbf6e4a2e56..bf87d324e5f 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e741a7309f661e0a48909.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-how-to-talk-about-a-typical-workday-and-tasks/657e741a7309f661e0a48909.md
@@ -10,7 +10,7 @@ audioPath: curriculum/js-music-player/We-Are-Going-to-Make-it.mp3
 
 # --description--
 
-Sarah's lunch break routine is a typical aspect of many workday schedules. 
+Sarah's lunch break routine is a typical aspect of many workday schedules.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b2296130e541911943345.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b2296130e541911943345.md
index 3a058e22a13..a4d3e66da77 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b2296130e541911943345.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b2296130e541911943345.md
@@ -4,6 +4,7 @@ title: Task 1
 challengeType: 22
 dashedName: task-1
 ---
+
 <!--
 AUDIO REFERENCE:
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b236691c67b197cd382f4.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b236691c67b197cd382f4.md
index b97564a40f2..bbb91909a44 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b236691c67b197cd382f4.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b236691c67b197cd382f4.md
@@ -4,6 +4,7 @@ title: Task 2
 challengeType: 19
 dashedName: task-2
 ---
+
 <!--
 AUDIO REFERENCE:
 
@@ -12,7 +13,7 @@ Alice: Hi, _! My _ is Alice, and I'm happy to _ part of the _.
 
 # --description--
 
-Pronouns are used for personal reference. 
+Pronouns are used for personal reference.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b400653813a1caa228aca.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b400653813a1caa228aca.md
index 48ecc9b36a9..c29c063eedb 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b400653813a1caa228aca.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b400653813a1caa228aca.md
@@ -4,6 +4,7 @@ title: Task 3
 challengeType: 19
 dashedName: task-3
 ---
+
 <!--
 AUDIO REFERENCE:
 My name is Alice, and I'm happy to be part of the team.
@@ -11,7 +12,7 @@ My name is Alice, and I'm happy to be part of the team.
 
 # --description--
 
-Sentences with the verb `to be` are often used to describe feelings and emotions. In the present simple tense, you use it to talk about how you feel right now. For example: 
+Sentences with the verb `to be` are often used to describe feelings and emotions. In the present simple tense, you use it to talk about how you feel right now. 예시:
 
 `I'm excited to be part of the team.` (The person is expressing their current positive feelings)
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b438144bd421e49e202e2.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b438144bd421e49e202e2.md
index 6503b9e802a..5f5d932ebb4 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b438144bd421e49e202e2.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b438144bd421e49e202e2.md
@@ -14,9 +14,9 @@ Alice: I'm a _ and I love creating _ that helps people in their daily activities
 
 # --description--
 
-In English, many professions are named by adding `er` to the end of a word that describes what the person does. 
+In English, many professions are named by adding `er` to the end of a word that describes what the person does.
 
-For example, a `programmer` is someone who `programs`, a `developer` is someone who `develops` software or systems. Another example is a `designer`, who is a person that `designs` websites, graphics, or products. 
+For example, a `programmer` is someone who `programs`, a `developer` is someone who `develops` software or systems. Another example is a `designer`, who is a person that `designs` websites, graphics, or products.
 
 By adding `er` to a verb, you create a noun that describes a person's job. It doesn´t apply to all professions but you'll see this pattern in many.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b5bd17d068521ee895631.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b5bd17d068521ee895631.md
index f29c8feb51b..a72ef38b485 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b5bd17d068521ee895631.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b5bd17d068521ee895631.md
@@ -4,6 +4,7 @@ title: Task 6
 challengeType: 22
 dashedName: task-6
 ---
+
 <!--
 AUDIO REFERENCE:
 
@@ -13,8 +14,7 @@ Alice: I'm a programmer and I love creating software that helps people in _ dail
 
 # --description--
 
-`Daily` means something that happens every day. For example:
-`I read the news daily` means I read the news every day.
+`Daily` means something that happens every day. For example: `I read the news daily` means I read the news every day.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b5de322bdee236e353230.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b5de322bdee236e353230.md
index 55c54a872b3..fbc31c5fd25 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b5de322bdee236e353230.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b5de322bdee236e353230.md
@@ -4,6 +4,7 @@ title: Task 9
 challengeType: 19
 dashedName: task-9
 ---
+
 # --description--
 
 Your `previous job` is the work you did before your current or most recent position. It refers to employment you had in the past. For example, if you used to work as a teacher and now you work as a programmer, your previous job was `teacher`.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b5f2319bc2223f2fc408a.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b5f2319bc2223f2fc408a.md
index 1f76c8206cd..379e3542ab8 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b5f2319bc2223f2fc408a.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b5f2319bc2223f2fc408a.md
@@ -4,6 +4,7 @@ title: Task 10
 challengeType: 22
 dashedName: task-10
 ---
+
 <!--
 AUDIO REFERENCE:
 
@@ -13,9 +14,9 @@ In my previous job, I developed _ _ for small businesses.
 
 # --description--
 
-`Develop` means to make or create something, especially something new. For example, someone might develop a new game or a website. 
+`Develop` means to make or create something, especially something new. For example, someone might develop a new game or a website.
 
-`Mobile` means something that can be moved or used on the go, like mobile phones or tablets. An `app` is short for `application`, a type of software designed to perform a specific task. 
+`Mobile` means something that can be moved or used on the go, like mobile phones or tablets. An `app` is short for `application`, a type of software designed to perform a specific task.
 
 So, `mobile apps` are applications specifically created to run on mobile devices. These apps can do many things, like help you shop, learn a new language, or play games.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b602d5bf54224a94cbfa6.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b602d5bf54224a94cbfa6.md
index f9cdc0657f0..a5cc29393bd 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b602d5bf54224a94cbfa6.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b602d5bf54224a94cbfa6.md
@@ -4,6 +4,7 @@ title: Task 11
 challengeType: 22
 dashedName: task-11
 ---
+
 <!--
 AUDIO REFERENCE:
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b615cdee8f12537d6f90c.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b615cdee8f12537d6f90c.md
index ed28a668cca..7caf1d197fe 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b615cdee8f12537d6f90c.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b615cdee8f12537d6f90c.md
@@ -4,6 +4,7 @@ title: Task 12
 challengeType: 19
 dashedName: task-12
 ---
+
 <!--
 AUDIO REFERENCE:
 In my previous job, I developed mobile apps for small businesses.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b631cc34605266f81b9bb.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b631cc34605266f81b9bb.md
index 29a1f04cf07..c5cbe49683e 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b631cc34605266f81b9bb.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b631cc34605266f81b9bb.md
@@ -4,6 +4,7 @@ title: Task 13
 challengeType: 19
 dashedName: task-13
 ---
+
 # --description--
 
 Do you remember this definition?
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b64017820f626f6a092c2.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b64017820f626f6a092c2.md
index f12d615cd0d..51bdda46795 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b64017820f626f6a092c2.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b64017820f626f6a092c2.md
@@ -4,6 +4,7 @@ title: Task 14
 challengeType: 19
 dashedName: task-14
 ---
+
 # --description--
 
 A `small business` is a company or enterprise that is typically independently owned and operated. It has relatively few employees and a smaller scale of operations compared to larger corporations.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b6531fad8572767c5b4dc.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b6531fad8572767c5b4dc.md
index 6622843e39b..3bba8534be0 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b6531fad8572767c5b4dc.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b6531fad8572767c5b4dc.md
@@ -4,11 +4,12 @@ title: Task 15
 challengeType: 19
 dashedName: task-15
 ---
+
 # --description--
 
-`Contribute` means to give or add something, such as ideas, effort, or resources, to a cause, project, or group in order to help achieve a common goal. In a technological context, this could look like: 
+`Contribute` means to give or add something, such as ideas, effort, or resources, to a cause, project, or group in order to help achieve a common goal. In a technological context, this could look like:
 
-`She contributes code to the open-source project every week.` 
+`She contributes code to the open-source project every week.`
 
 `We contribute our technical skills to develop the app.`
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b661cc0427227c7e7aec0.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b661cc0427227c7e7aec0.md
index 803d84ac2fe..9076a35df52 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b661cc0427227c7e7aec0.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b661cc0427227c7e7aec0.md
@@ -4,6 +4,7 @@ title: Task 16
 challengeType: 19
 dashedName: task-16
 ---
+
 # --description--
 
 Following the concept of `contribute`, let's explore how it applies specifically in technology projects. When someone contributes to a tech project, they might add code, ideas, or even help with documentation. Remember the examples from the previous task:
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b66c57499db2828adac5e.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b66c57499db2828adac5e.md
index 79d67a8f2a4..5a885686ff8 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b66c57499db2828adac5e.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b66c57499db2828adac5e.md
@@ -4,6 +4,7 @@ title: Task 17
 challengeType: 19
 dashedName: task-17
 ---
+
 # --description--
 
 `To collaborate` means to work together with others to achieve a common goal, often involving shared responsibilities and teamwork. While `contributing` involves adding something to a project, `collaborating` emphasizes working together as a team. For example:
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b674c711e5428985017ca.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b674c711e5428985017ca.md
index f0249df143c..dc5c2995f65 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b674c711e5428985017ca.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b674c711e5428985017ca.md
@@ -4,6 +4,7 @@ title: Task 18
 challengeType: 22
 dashedName: task-18
 ---
+
 <!--
 AUDIO REFERENCE:
 
@@ -12,7 +13,7 @@ I really want to collaborate with you and to contribute to our projects here at
 
 # --description--
 
-Listen to the sentence and fill in the missing words. 
+Listen to the sentence and fill in the missing words.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b67daf0b2d128ece96345.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b67daf0b2d128ece96345.md
index d51de1f5fea..e8095b3501e 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b67daf0b2d128ece96345.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b67daf0b2d128ece96345.md
@@ -4,6 +4,7 @@ title: Task 19
 challengeType: 19
 dashedName: task-19
 ---
+
 <!--
 AUDIO REFERENCE:
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b68caf6debb2975503948.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b68caf6debb2975503948.md
index e1e55867ba8..0f2fcfc2bf4 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b68caf6debb2975503948.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b68caf6debb2975503948.md
@@ -4,6 +4,7 @@ title: Task 20
 challengeType: 19
 dashedName: task-20
 ---
+
 <!--
 AUDIO REFERENCE:
 
@@ -12,7 +13,7 @@ It's nice to have you here, Alice.
 
 # --description--
 
-`It’s nice to` is used to express a positive sentiment or feeling about something or someone. 
+`It’s nice to` is used to express a positive sentiment or feeling about something or someone.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b6940d1ad7829b4d9a918.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b6940d1ad7829b4d9a918.md
index 3d6e6b639e8..4a78bc8aef5 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b6940d1ad7829b4d9a918.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b6940d1ad7829b4d9a918.md
@@ -4,6 +4,7 @@ title: Task 21
 challengeType: 22
 dashedName: task-21
 ---
+
 <!--
 AUDIO REFERENCE:
 
@@ -12,7 +13,7 @@ Bob: It's nice to have you here, Alice. I'm Bob, the project manager. Welcome ab
 
 # --description--
 
-In this task, listen to the sentence and fill in the missing words. 
+In this task, listen to the sentence and fill in the missing words.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b6a7dd8fb2f2a52da24f5.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b6a7dd8fb2f2a52da24f5.md
index a9a774b0140..d5c687d0ac0 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b6a7dd8fb2f2a52da24f5.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657b6a7dd8fb2f2a52da24f5.md
@@ -4,6 +4,7 @@ title: Task 22
 challengeType: 19
 dashedName: task-22
 ---
+
 <!--
 AUDIO REFERENCE:
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c9900c2df3b6ffdd86129.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c9900c2df3b6ffdd86129.md
index e0af4a890b7..c2842a98ee5 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c9900c2df3b6ffdd86129.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c9900c2df3b6ffdd86129.md
@@ -4,6 +4,7 @@ title: Task 23
 challengeType: 22
 dashedName: task-23
 ---
+
 <!--
 AUDIO REFERENCE:
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca06716e21b803ffb55d5.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca06716e21b803ffb55d5.md
index cec0ab2049c..2c4767e8094 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca06716e21b803ffb55d5.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca06716e21b803ffb55d5.md
@@ -12,7 +12,7 @@ Bob: Alright, team. This is Alice's first day with us, so please let me introduc
 
 # --description--
 
-Listen to the audio and answer the question. 
+Listen to the audio and answer the question.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca33bb1f197812c1a358b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca33bb1f197812c1a358b.md
index 612881d67b7..a8a9e8b5a23 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca33bb1f197812c1a358b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca33bb1f197812c1a358b.md
@@ -4,6 +4,7 @@ title: Task 26
 challengeType: 19
 dashedName: task-26
 ---
+
 <!--
 AUDIO REFERENCE:
 Bob: Alright, team. This is Alice's first day with us, so please let me introduce you all to her.
@@ -11,7 +12,7 @@ Bob: Alright, team. This is Alice's first day with us, so please let me introduc
 
 # --description--
 
-Listen to the audio and answer the question. 
+Listen to the audio and answer the question.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca36eacc797817451ece6.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca36eacc797817451ece6.md
index 21d70330afd..e88154d0894 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca36eacc797817451ece6.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca36eacc797817451ece6.md
@@ -13,7 +13,7 @@ Bob: Alright, team. This is Alice's first day with us, so please let me introduc
 
 # --description--
 
-Listen to the audio and answer the question. 
+Listen to the audio and answer the question.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca45e1fc9398243722c8c.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca45e1fc9398243722c8c.md
index 3a097c50ea2..555495c1464 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca45e1fc9398243722c8c.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca45e1fc9398243722c8c.md
@@ -12,7 +12,7 @@ Bob: Alright, team. This is Alice's first day with us, so please let me introduc
 
 # --description--
 
-Listen to the audio and answer the question. 
+Listen to the audio and answer the question.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca50a95d1c3828ee5a991.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca50a95d1c3828ee5a991.md
index 6256fc740bd..2bf6978b870 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca50a95d1c3828ee5a991.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca50a95d1c3828ee5a991.md
@@ -4,6 +4,7 @@ title: Task 29
 challengeType: 19
 dashedName: task-29
 ---
+
 <!--
 AUDIO REFERENCE:
 Bob: Well, I'm Bob, your project manager. I'm really happy to see new faces joining the team.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca59e6e559782e4c10056.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca59e6e559782e4c10056.md
index 9146e645b45..a25ccd36c5c 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca59e6e559782e4c10056.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca59e6e559782e4c10056.md
@@ -4,6 +4,7 @@ title: Task 30
 challengeType: 22
 dashedName: task-30
 ---
+
 <!--
 AUDIO REFERENCE:
 This is Sarah, the senior software developer.
@@ -11,7 +12,7 @@ This is Sarah, the senior software developer.
 
 # --description--
 
-In companies, job titles often include words that indicate the level of seniority. `Senior` means having a higher level or more experience in a role. For instance, a `senior software developer` usually has more experience than a `software developer`. 
+In companies, job titles often include words that indicate the level of seniority. `Senior` means having a higher level or more experience in a role. For instance, a `senior software developer` usually has more experience than a `software developer`.
 
 Other common terms include `junior`, for less experienced roles, and `lead` or `head`, for top-level positions. Here are some examples:
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca8e65f9c2c836eecd834.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca8e65f9c2c836eecd834.md
index dd5464b57be..ae3a5d800f7 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca8e65f9c2c836eecd834.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca8e65f9c2c836eecd834.md
@@ -4,6 +4,7 @@ title: Task 31
 challengeType: 19
 dashedName: task-31
 ---
+
 <!--
 AUDIO REFERENCE:
 She has been with the company for five years, working on several projects.
@@ -11,8 +12,7 @@ She has been with the company for five years, working on several projects.
 
 # --description--
 
-The phrase `has been` is used in English to talk about something that started in the past and is still happening now. It is often used with expressions of time. For example:
-`She has been with the company for ten years` means that this person started working at the company ten years ago and is still working there.
+The phrase `has been` is used in English to talk about something that started in the past and is still happening now. It is often used with expressions of time. For example: `She has been with the company for ten years` means that this person started working at the company ten years ago and is still working there.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca996f3fdf683f408f632.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca996f3fdf683f408f632.md
index e44bf6d352e..3b79268b706 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca996f3fdf683f408f632.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ca996f3fdf683f408f632.md
@@ -12,7 +12,7 @@ She has been with the company for five years, working on several projects.
 
 # --description--
 
-`Several` is a word used to indicate an unspecified quantity that is more than two but not many. It's often used when the exact number is not important or not known. 
+`Several` is a word used to indicate an unspecified quantity that is more than two but not many. It's often used when the exact number is not important or not known.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657caa4012f1cf846dcaa619.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657caa4012f1cf846dcaa619.md
index 6bef49a2b7e..43c51313cbb 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657caa4012f1cf846dcaa619.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657caa4012f1cf846dcaa619.md
@@ -4,6 +4,7 @@ title: Task 33
 challengeType: 19
 dashedName: task-33
 ---
+
 <!--
 AUDIO REFERENCE:
 This is John, the database administrator. He’s been here for three years. He makes sure our data is secure and efficient.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cad90d6745e85569cdc06.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cad90d6745e85569cdc06.md
index d0e235fbcc9..c4b5290771e 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cad90d6745e85569cdc06.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cad90d6745e85569cdc06.md
@@ -4,6 +4,7 @@ title: Task 34
 challengeType: 22
 dashedName: task-34
 ---
+
 <!--
 AUDIO REFERENCE:
 This is John, the database administrator. He’s been here for three years. He makes sure our data is secure and efficient.
@@ -11,7 +12,7 @@ This is John, the database administrator. He’s been here for three years. He m
 
 # --description--
 
-In the context of database management, `secure` means keeping data safe from unauthorized access or cyber threats. `Efficient` refers to how well the data is managed and used, ensuring it is easily accessible and performs well. 
+In the context of database management, `secure` means keeping data safe from unauthorized access or cyber threats. `Efficient` refers to how well the data is managed and used, ensuring it is easily accessible and performs well.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657caec5163c6c85e5b31284.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657caec5163c6c85e5b31284.md
index dd5face8eb6..8bb37e6c828 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657caec5163c6c85e5b31284.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657caec5163c6c85e5b31284.md
@@ -4,6 +4,7 @@ title: Task 35
 challengeType: 22
 dashedName: task-35
 ---
+
 <!--
 AUDIO REFERENCE:
 This is John, the database administrator. He’s been here for three years.
@@ -11,11 +12,11 @@ This is John, the database administrator. He’s been here for three years.
 
 # --description--
 
-`He's` can be a short form for `he has` or `he is`. You can understand which one it is by looking at the context. When `he's` is followed by a verb in the past participle (like `been`, `done`, `seen`), it means `he has`. For example:
+`He's` can be a short form for `he has` or `he is`. You can understand which one it is by looking at the context. When `he's` is followed by a verb in the past participle (like `been`, `done`, `seen`), it means `he has`. 예시:
 
-`He's been working` means `he has been working`. 
+`He's been working` means `he has been working`.
 
-If `he's` is followed by an adjective or a present participle (like `tired`, `going`, `sleeping`), it means `he is`. For example: 
+If `he's` is followed by an adjective or a present participle (like `tired`, `going`, `sleeping`), it means `he is`. 예:
 
 `He's tired` means `he is tired`. Understanding this helps you know exactly what someone means when they say `he's`.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cafc142a867006734c3ed.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cafc142a867006734c3ed.md
index 852c364452d..df823935018 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cafc142a867006734c3ed.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cafc142a867006734c3ed.md
@@ -4,6 +4,7 @@ title: Task 36
 challengeType: 19
 dashedName: task-36
 ---
+
 <!--
 AUDIO REFERENCE:
 This is John, the database administrator. He’s been here for three years.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccd18f62d4c0292a97808.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccd18f62d4c0292a97808.md
index 13269daaa41..62d8bfddee8 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccd18f62d4c0292a97808.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccd18f62d4c0292a97808.md
@@ -7,7 +7,7 @@ dashedName: task-37
 
 # --description--
 
-`UX` stands for `User Experience`, and `UI` stands for `User Interface`. A `UX/UI designer` works on designing websites or applications to make them easy and pleasant to use. 
+`UX` stands for `User Experience`, and `UI` stands for `User Interface`. A `UX/UI designer` works on designing websites or applications to make them easy and pleasant to use.
 
 The `UX` part focuses on the overall feel of the experience, while `UI` focuses on the specific layout and design of the interface.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccd8e0b8383034fa1be0b.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccd8e0b8383034fa1be0b.md
index 374bc99343b..0e35fd93555 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccd8e0b8383034fa1be0b.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccd8e0b8383034fa1be0b.md
@@ -4,6 +4,7 @@ title: Task 38
 challengeType: 22
 dashedName: task-38
 ---
+
 <!--
 AUDIO REFERENCE:
 Finally, this is Linda, our UX/UI designer. She joined the team last year.
@@ -11,8 +12,7 @@ Finally, this is Linda, our UX/UI designer. She joined the team last year.
 
 # --description--
 
-`Join` and `joined` are different forms of the same verb. `Join` is the base form, used for the present tense or imperative. 
-`Joined` is the past tense, used for actions completed in the past. 
+`Join` and `joined` are different forms of the same verb. `Join` is the base form, used for the present tense or imperative. `Joined` is the past tense, used for actions completed in the past.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccdeb0919a803c00c8cbd.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccdeb0919a803c00c8cbd.md
index 54ef1003258..4918e10f940 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccdeb0919a803c00c8cbd.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccdeb0919a803c00c8cbd.md
@@ -4,6 +4,7 @@ title: Task 39
 challengeType: 19
 dashedName: task-39
 ---
+
 <!--
 AUDIO REFERENCE:
 Finally, this is Linda, our UX/UI designer. She joined the team last year.
@@ -11,7 +12,7 @@ Finally, this is Linda, our UX/UI designer. She joined the team last year.
 
 # --description--
 
-`Last year` refers to the year before the current one. For example, if it is 2023 now, last year was 2022. `This year` refers to the current year, 2023 in this example. 
+`Last year` refers to the year before the current one. For example, if it is 2023 now, last year was 2022. `This year` refers to the current year, 2023 in this example.
 
 `Next year` will be the year after the current one, which would be 2024 in this case. Understanding these expressions helps in placing events correctly in time.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccee0cbd78d044dfe4a77.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccee0cbd78d044dfe4a77.md
index 059136f43a6..56dd120bf00 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccee0cbd78d044dfe4a77.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccee0cbd78d044dfe4a77.md
@@ -4,6 +4,7 @@ title: Task 40
 challengeType: 22
 dashedName: task-40
 ---
+
 <!--
 AUDIO REFERENCE:
 Finally, this is Linda, our UX/UI designer. She loves creating user-friendly interfaces.
@@ -11,7 +12,7 @@ Finally, this is Linda, our UX/UI designer. She loves creating user-friendly int
 
 # --description--
 
-In the context of UX/UI design, `user-friendly` refers to something that is easy and pleasant to use, especially digital products like websites or apps. 
+In the context of UX/UI design, `user-friendly` refers to something that is easy and pleasant to use, especially digital products like websites or apps.
 
 An `interface` is the part of a computer system or program that users interact with. These terms are key in understanding what makes a good design from the user's perspective.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccf3ab9ef2604c6ba696f.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccf3ab9ef2604c6ba696f.md
index bc6690ffbf1..062f81210e3 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccf3ab9ef2604c6ba696f.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccf3ab9ef2604c6ba696f.md
@@ -4,6 +4,7 @@ title: Task 41
 challengeType: 19
 dashedName: task-41
 ---
+
 <!--
 AUDIO REFERENCE:
 Finally, this is Linda, our UX/UI designer. She joined the team last year. She loves creating user-friendly interfaces.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccfa7eeb47305177d4a45.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccfa7eeb47305177d4a45.md
index c5e640c388f..1e1432422f0 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccfa7eeb47305177d4a45.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ccfa7eeb47305177d4a45.md
@@ -4,6 +4,7 @@ title: Task 42
 challengeType: 19
 dashedName: task-42
 ---
+
 <!--
 AUDIO REFERENCE:
 Everybody, let’s welcome Alice to the team.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd0e81302a205cfbc10a2.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd0e81302a205cfbc10a2.md
index 99eeb3aa1da..2d074d88546 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd0e81302a205cfbc10a2.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd0e81302a205cfbc10a2.md
@@ -4,6 +4,7 @@ title: Task 43
 challengeType: 22
 dashedName: task-43
 ---
+
 <!--
 AUDIO REFERENCE:
 Alice: Great! Thanks, everybody! Well, I'm Alice. I'm starting as a junior developer today.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd1cdaa5260067b6fb93e.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd1cdaa5260067b6fb93e.md
index 66e9d4a708a..74359e346e8 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd1cdaa5260067b6fb93e.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd1cdaa5260067b6fb93e.md
@@ -4,6 +4,7 @@ title: Task 44
 challengeType: 19
 dashedName: task-44
 ---
+
 <!--
 AUDIO REFERENCE:
 I really like learning new things and I can't wait to start contributing to our projects.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd301c8cef107941a5552.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd301c8cef107941a5552.md
index 32a4ad55fb7..5687a4dbd75 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd301c8cef107941a5552.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd301c8cef107941a5552.md
@@ -4,6 +4,7 @@ title: Task 46
 challengeType: 19
 dashedName: task-46
 ---
+
 <!--
 AUDIO REFERENCE:
 Alice: Great! Thanks, everybody! Well, I'm Alice. I'm starting as a junior developer today. I really like learning new things and I can't wait to start contributing to our projects.
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd5bac0e2df08b433b29d.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd5bac0e2df08b433b29d.md
index ede5cfb06da..8bb10004585 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd5bac0e2df08b433b29d.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd5bac0e2df08b433b29d.md
@@ -7,9 +7,9 @@ dashedName: task-47
 
 # --description--
 
-The phrase `I hope you're all well` is a caring expression often used in emails, letters, and personal greetings. It reflects a kind gesture of wishing someone health and happiness. 
+The phrase `I hope you're all well` is a caring expression often used in emails, letters, and personal greetings. It reflects a kind gesture of wishing someone health and happiness.
 
-This phrase is versatile and can be used in both casual and formal settings. 
+This phrase is versatile and can be used in both casual and formal settings.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd6c342d0e8093dd5c540.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd6c342d0e8093dd5c540.md
index 795256a742a..dcc54503cd7 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd6c342d0e8093dd5c540.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd6c342d0e8093dd5c540.md
@@ -12,7 +12,7 @@ Bob: Good morning, everyone! I hope you're all well.
 
 # --description--
 
-The word `hope` is used to express a wish for something to be true or to happen. For example, saying `I hope you're doing well` means you wish that the person is fine or happy. 
+The word `hope` is used to express a wish for something to be true or to happen. For example, saying `I hope you're doing well` means you wish that the person is fine or happy.
 
 `Well` is often used to mean in good health or in a good condition. For example, `Are you feeling well today?` is asking if someone is in good health.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd816f3caf509f85e4d4a.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd816f3caf509f85e4d4a.md
index 93ff41b7a9b..b75ede5bcc8 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd816f3caf509f85e4d4a.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd816f3caf509f85e4d4a.md
@@ -12,7 +12,7 @@ I'd like to introduce Lisa. She’s our new front-end developer.
 
 # --description--
 
-`Would like` is used to express a desire or wish in a polite way. For example, `I would like to show you something` indicates a polite intention. 
+`Would like` is used to express a desire or wish in a polite way. For example, `I would like to show you something` indicates a polite intention.
 
 In spoken English, it's often abbreviated to `I'd`. For example, `I'd like to show you something`. This abbreviation is very common in everyday conversation.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd8d94290160a8732893d.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd8d94290160a8732893d.md
index 9892dfeaf23..fe4d6a989d3 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd8d94290160a8732893d.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd8d94290160a8732893d.md
@@ -12,7 +12,7 @@ Let me introduce you all briefly.
 
 # --description--
 
-The word `brief` means short in duration or length. When people say something is `brief`, it indicates that it won't take a lot of time. 
+The word `brief` means short in duration or length. When people say something is `brief`, it indicates that it won't take a lot of time.
 
 `Briefly` is the adverb form of `brief` and is used to describe how an action is done. For example, `I will speak briefly` means the speaking will be done for a short time.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd9ae412af80b2a7ff265.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd9ae412af80b2a7ff265.md
index d5785dfb876..f7e86ab051c 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd9ae412af80b2a7ff265.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cd9ae412af80b2a7ff265.md
@@ -14,7 +14,7 @@ You can talk to her any time, even in this virtual setting, if you have any ques
 
 `Any` is used to indicate no matter which one, no matter when, or no matter what. For example, `You can ask me any question` means you can ask all kinds of questions.
 
-`Even` is used to emphasize something unexpected or to include something in addition. For example, `She can speak many languages, even Tupi` means that it's surprising or notable that she can also speak Tupi, in addition to other languages. 
+`Even` is used to emphasize something unexpected or to include something in addition. For example, `She can speak many languages, even Tupi` means that it's surprising or notable that she can also speak Tupi, in addition to other languages.
 
 The word even highlights something extra or beyond what is usual.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cdf0217569e0ce2e40cd1.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cdf0217569e0ce2e40cd1.md
index a7ca58b2355..5ddbcff0bea 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cdf0217569e0ce2e40cd1.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cdf0217569e0ce2e40cd1.md
@@ -12,8 +12,7 @@ Lisa: Hi, Sarah. Thank you! I'm excited to work with all of you and learn from y
 
 # --description--
 
-The word `expertise` refers to special skills or knowledge that someone has, especially because of their experience or training.
-For example, `She has expertise in web design` means she is very skilled or knowledgeable in web design. 
+The word `expertise` refers to special skills or knowledge that someone has, especially because of their experience or training. For example, `She has expertise in web design` means she is very skilled or knowledgeable in web design.
 
 It's often used in a professional context to talk about the strengths or special abilities someone brings to a team or a project.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cdfc400c4130d43bab6e9.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cdfc400c4130d43bab6e9.md
index b27a00bc1a6..6be3dc63939 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cdfc400c4130d43bab6e9.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657cdfc400c4130d43bab6e9.md
@@ -12,11 +12,11 @@ Lisa: I'm excited to work with all of you and learn from your expertise.
 
 # --description--
 
-`All of you` is a phrase used to include every person in a group. For example, `I want to thank all of you for coming` means thanking every person who came. 
+`All of you` is a phrase used to include every person in a group. For example, `I want to thank all of you for coming` means thanking every person who came.
 
-The word `your` can refer to something that belongs to either an individual or a group, depending on the context. 
+The word `your` can refer to something that belongs to either an individual or a group, depending on the context.
 
-When talking to one person, `your` refers to something belonging to that individual. For example, `Your book is on the table` means the book belongs to the individual you're speaking to. 
+When talking to one person, `your` refers to something belonging to that individual. For example, `Your book is on the table` means the book belongs to the individual you're speaking to.
 
 In contrast, when speaking to a group, `your` can refer to something that belongs to all of them. For example, `Your project is impressive` means the project belonging to the entire group is impressive. Understanding the context helps to determine if `your` is singular or plural.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce2aee8f1d30e17cf89e5.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce2aee8f1d30e17cf89e5.md
index 4b56b4cb5e8..b7249f44672 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce2aee8f1d30e17cf89e5.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce2aee8f1d30e17cf89e5.md
@@ -12,7 +12,7 @@ Bob: This is Tom, our new graphic designer. Is there any specific area of design
 
 # --description--
 
-`Interested in` is a phrase used to ask or talk about someone's preferences, hobbies, or areas of professional focus. For example, in `What are you interested in?`, they want to know about your hobbies, likes, or professional interests. 
+`Interested in` is a phrase used to ask or talk about someone's preferences, hobbies, or areas of professional focus. For example, in `What are you interested in?`, they want to know about your hobbies, likes, or professional interests.
 
 It's a common way to learn more about a person's preferences in a friendly way.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce387f809d60eb54f06d6.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce387f809d60eb54f06d6.md
index 14629c90c16..52a904241af 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce387f809d60eb54f06d6.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce387f809d60eb54f06d6.md
@@ -12,9 +12,9 @@ Bob: Is there any specific area of design or development you're interested in? H
 
 # --description--
 
-`Go-to person` is used to describe a person who is an expert or the best person to approach in a specific field or for a particular issue. 
+`Go-to person` is used to describe a person who is an expert or the best person to approach in a specific field or for a particular issue.
 
-For example, `He's the go-to guy for computer problems` means he is the person best suited to help with computer issues. 
+For example, `He's the go-to guy for computer problems` means he is the person best suited to help with computer issues.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce469dc28f40f4b7ac75d.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce469dc28f40f4b7ac75d.md
index 9b8e1f2e810..aa6368e1773 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce469dc28f40f4b7ac75d.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce469dc28f40f4b7ac75d.md
@@ -7,8 +7,7 @@ dashedName: task-59
 
 # --description--
 
-`Is there` and `Are there` are used at the beginning of questions to ask about the existence or presence of something. 
-`Is there` is used for singular nouns, like in `Is there a solution?` `Are there` is used for plural nouns, such as in `Are there any questions?` 
+`Is there` and `Are there` are used at the beginning of questions to ask about the existence or presence of something. `Is there` is used for singular nouns, like in `Is there a solution?` `Are there` is used for plural nouns, such as in `Are there any questions?`
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce7ed5eb7171156711c77.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce7ed5eb7171156711c77.md
index ec1ddc8eb60..673e2732a3a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce7ed5eb7171156711c77.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657ce7ed5eb7171156711c77.md
@@ -12,7 +12,7 @@ Lisa: Hi, Tom. I'm interested in UI/UX design and front-end development, but I'm
 
 # --description--
 
-When someone says `I'm open to`, it means they are willing to consider new ideas or experiences. It shows that they are flexible and interested in trying different things. 
+When someone says `I'm open to`, it means they are willing to consider new ideas or experiences. It shows that they are flexible and interested in trying different things.
 
 For instance, saying `I'm open to learning more` means the person is ready to learn new things. It's a useful phrase to express a positive attitude towards new opportunities or changes.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657daa5ab8505427a5b99cd2.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657daa5ab8505427a5b99cd2.md
index d29bcd1f0d5..81d6faebd68 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657daa5ab8505427a5b99cd2.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657daa5ab8505427a5b99cd2.md
@@ -12,7 +12,7 @@ Bob: And I’m Bob, the team’s project manager.
 
 # --description--
 
-In the audio, Bob introduces himself and states his role in the company. 
+In the audio, Bob introduces himself and states his role in the company.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657daad61699f1281c5dca55.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657daad61699f1281c5dca55.md
index f83fb24d8cb..bcc5780886a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657daad61699f1281c5dca55.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657daad61699f1281c5dca55.md
@@ -7,7 +7,7 @@ dashedName: task-65
 
 # --description--
 
-A `project manager` is a key role in many companies. This person is responsible for planning, organizing, and directing the completion of specific projects while ensuring these projects are on time, on budget, and within scope. 
+A `project manager` is a key role in many companies. This person is responsible for planning, organizing, and directing the completion of specific projects while ensuring these projects are on time, on budget, and within scope.
 
 A `project manager` often coordinates with different team members, sets deadlines, assigns responsibilities, and monitors the progress of the project.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657dab674b9de728828aa020.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657dab674b9de728828aa020.md
index d14b3f990d6..00f0ba31542 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657dab674b9de728828aa020.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657dab674b9de728828aa020.md
@@ -12,7 +12,7 @@ Bob: And I’m Bob, the team’s project manager. I’m the person you always ne
 
 # --description--
 
-In a professional context, a `schedule` refers to a planned timeline for tasks or events. Understanding a project's schedule is key to managing time effectively. For example:
+In a professional context, a `schedule` refers to a planned timeline for tasks or events. Understanding a project's schedule is key to managing time effectively. 예시:
 
 `This is the schedule of the day` refers to all activities and actions planned for that day.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657df30a140de766c3896294.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657df30a140de766c3896294.md
index 5b0859827dd..f6d776fb76a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657df30a140de766c3896294.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657df30a140de766c3896294.md
@@ -12,7 +12,7 @@ OK, team. Let's help Lisa with the support she needs to start.
 
 # --description--
 
-In a team context, `to support` means to provide help or assistance to someone. It's about making sure team members have what they need to succeed. 
+In a team context, `to support` means to provide help or assistance to someone. It's about making sure team members have what they need to succeed.
 
 # --fillInTheBlank--
 
@@ -26,7 +26,7 @@ In a team context, `to support` means to provide help or assistance to someone.
 
 ### --feedback--
 
-This word is a contraction of `let us`, used to suggest a proposal or offer for the group. First word is capitalized. 
+This word is a contraction of `let us`, used to suggest a proposal or offer for the group. First word is capitalized.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657df39e98ace1673de4c399.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657df39e98ace1673de4c399.md
index f11f1932381..6bb985fe7ea 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657df39e98ace1673de4c399.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657df39e98ace1673de4c399.md
@@ -12,7 +12,7 @@ OK, team. Let's help Lisa with the support she needs to start.
 
 # --description--
 
-Bob is asking something to the team. 
+Bob is asking something to the team.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e3ca1c4d9636e9012e1a9.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e3ca1c4d9636e9012e1a9.md
index 5872963b72e..a691df098d7 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e3ca1c4d9636e9012e1a9.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e3ca1c4d9636e9012e1a9.md
@@ -12,7 +12,7 @@ Can you briefly introduce yourself?
 
 # --description--
 
-James is making a request to Sophie. 
+James is making a request to Sophie.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e3dc46c5a816f0b12fb76.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e3dc46c5a816f0b12fb76.md
index 6e6d909804f..a4e08ecfbae 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e3dc46c5a816f0b12fb76.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e3dc46c5a816f0b12fb76.md
@@ -12,9 +12,9 @@ Sophie: Hi, I'm Sophie, and I'm here to improve my project management skills. I
 
 # --description--
 
-To `manage` means to be in charge of or control something. For example, `He manages a small team at work` means he is responsible for overseeing the team. 
+To `manage` means to be in charge of or control something. For example, `He manages a small team at work` means he is responsible for overseeing the team.
 
-`Management` refers to the act or skill of managing. Like, `Good time management is important for success`. 
+`Management` refers to the act or skill of managing. Like, `Good time management is important for success`.
 
 `Project management` combines these skills specifically for projects. It means planning, organizing, and running projects to reach goals. An example is `She is learning project management to lead her team better`.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e408c387898706d4c1b46.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e408c387898706d4c1b46.md
index f92765270e9..d947948bc00 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e408c387898706d4c1b46.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e408c387898706d4c1b46.md
@@ -12,7 +12,7 @@ James: Thank you, Sophie. We have a lot to talk about today
 
 # --description--
 
-In meetings, phrases like `We have a lot to talk about today` are often used. `We have` means something belongs or is related to the group. `A lot` means many or much, and `to talk about` means there are things to discuss. 
+In meetings, phrases like `We have a lot to talk about today` are often used. `We have` means something belongs or is related to the group. `A lot` means many or much, and `to talk about` means there are things to discuss.
 
 Understanding these phrases helps you follow what is planned for a meeting or a discussion.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4173056b4771208c184d.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4173056b4771208c184d.md
index 410cecb8923..15d023a359b 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4173056b4771208c184d.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4173056b4771208c184d.md
@@ -4,6 +4,7 @@ title: Task 81
 challengeType: 22
 dashedName: task-81
 ---
+
 <!--
 AUDIO REFERENCE:
 James: Thank you, Sophie. We have a lot to talk about today
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e421f8d8e9871a83cda7f.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e421f8d8e9871a83cda7f.md
index a8f2d2758ee..336c50437f2 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e421f8d8e9871a83cda7f.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e421f8d8e9871a83cda7f.md
@@ -12,7 +12,7 @@ James: ...and I'm sure we'll have great insights to share during our training se
 
 # --description--
 
-`Insights` are valuable thoughts or understanding gained from experience or learning. For example, `gaining insights into a project` means learning important things about it. 
+`Insights` are valuable thoughts or understanding gained from experience or learning. For example, `gaining insights into a project` means learning important things about it.
 
 A `training session` is a period of time dedicated to learning new skills or information. It's like a class. For instance, `attending a training session on communication` means going to a class to learn about communication.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e42d9cf8693725896cc49.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e42d9cf8693725896cc49.md
index b2daf78dddd..11aa3816a72 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e42d9cf8693725896cc49.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e42d9cf8693725896cc49.md
@@ -4,6 +4,7 @@ title: Task 84
 challengeType: 22
 dashedName: task-84
 ---
+
 <!--
 AUDIO REFERENCE:
 James: Thank you, Sophie. We have a lot to talk about today, and I'm sure we'll have great insights to share during our training session. Let's get started!
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e496dda7af77d6798e7f7.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e496dda7af77d6798e7f7.md
index 261b7e34c23..786a0eeab56 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e496dda7af77d6798e7f7.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e496dda7af77d6798e7f7.md
@@ -12,7 +12,7 @@ Maria: Welcome, everyone. Today, we have with us our clients from FCC Corporatio
 
 # --description--
 
-A `corporation` is a type of business or company. It's a legal entity that is separate from its owners. Corporations can own property, be sued, and make contracts. 
+A `corporation` is a type of business or company. It's a legal entity that is separate from its owners. Corporations can own property, be sued, and make contracts.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e49f3ee34e67dbe0d8848.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e49f3ee34e67dbe0d8848.md
index 2d3de3d61b5..f6858710a52 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e49f3ee34e67dbe0d8848.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e49f3ee34e67dbe0d8848.md
@@ -4,6 +4,7 @@ title: Task 86
 challengeType: 19
 dashedName: task-86
 ---
+
 <!--
 AUDIO REFERENCE:
 Maria: Welcome, everyone. Today, we have with us our clients from FCC Corporation.
@@ -11,7 +12,7 @@ Maria: Welcome, everyone. Today, we have with us our clients from FCC Corporatio
 
 # --description--
 
-A `representative` is a person chosen or appointed to speak or act on behalf of others. In a business context, representatives from a company attend meetings to discuss their needs or collaborate on projects. 
+A `representative` is a person chosen or appointed to speak or act on behalf of others. In a business context, representatives from a company attend meetings to discuss their needs or collaborate on projects.
 
 For example, `He is our representative at the conference` means he is the person attending the conference to represent the interests of his company.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4b7d381d567e8d97967c.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4b7d381d567e8d97967c.md
index 0c6971eac2d..9dee341cda9 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4b7d381d567e8d97967c.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4b7d381d567e8d97967c.md
@@ -12,9 +12,9 @@ I'm Maria, the lead developer. I’m responsible for the technical aspects of th
 
 # --description--
 
-`To coordinate` means to arrange for things to work together effectively. For example, `She coordinates the team's meetings` means she arranges the meetings so everyone can attend. 
+`To coordinate` means to arrange for things to work together effectively. For example, `She coordinates the team's meetings` means she arranges the meetings so everyone can attend.
 
-`Efforts` are the attempts or hard work put into doing something. Like, `His efforts in the project were noticeable`. 
+`Efforts` are the attempts or hard work put into doing something. Like, `His efforts in the project were noticeable`.
 
 `Coordinating efforts` in a project means organizing everyone's work so the project is successful. It's like making sure all parts of a puzzle fit together.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4c1f0bd3e97ef2d46644.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4c1f0bd3e97ef2d46644.md
index 3b7c16f7099..3679b965b9b 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4c1f0bd3e97ef2d46644.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4c1f0bd3e97ef2d46644.md
@@ -12,7 +12,7 @@ I'm Maria, the lead developer. I’m responsible for the technical aspects of th
 
 # --description--
 
-`To meet someone's needs` means to fulfill or satisfy what someone requires or wants. In a project, this could mean making sure that the work done fits the client's requirements. 
+`To meet someone's needs` means to fulfill or satisfy what someone requires or wants. In a project, this could mean making sure that the work done fits the client's requirements.
 
 For example, `Our team works hard to meet the client's needs` means the team aims to do what the client wants. This phrase is often used in customer service and project management.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4de2c8c70a7ff7e1546d.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4de2c8c70a7ff7e1546d.md
index aeec65b3145..47c5b9e7065 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4de2c8c70a7ff7e1546d.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4de2c8c70a7ff7e1546d.md
@@ -12,7 +12,7 @@ Maria: This is Sarah, the senior developer. She and I work together to ensure th
 
 # --description--
 
-`To ensure` means to make certain or guarantee that something happens. For example, `We ensure quality by checking every product` means they make sure every product is good. 
+`To ensure` means to make certain or guarantee that something happens. For example, `We ensure quality by checking every product` means they make sure every product is good.
 
 In a project, ensuring success means doing things that help the project succeed, like planning well or solving problems quickly.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4e3b02a2128049c344c8.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4e3b02a2128049c344c8.md
index 234d56a89a5..c322a410e5e 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4e3b02a2128049c344c8.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e4e3b02a2128049c344c8.md
@@ -39,29 +39,9 @@ Refers to the act of being introduced to someone for the first time.
 # --scene--
 
 ```json
-{
-  "setup": {
-    "background": "company1-boardroom.png",
-    "characters": [
-      {
-        "character": "David",
-        "position": {"x":50,"y":0,"z":1.4},
-        "opacity": 0
-      }
-    ],
-    "audio": {
-      "filename": "1.2-5.mp3",
-      "startTime": 1,
-      "startTimestamp": 27.38,
-      "finishTimestamp": 29.06
-    }
-  },
-  "commands": [
-    {
-      "character": "David",
-      "opacity": 1,
-      "startTime": 0
-    },
+{ "setup": { "background": "company1-boardroom.png", "characters": [
+      { "character": "David", "position": {"x":50,"y":0,"z":1.4}, "opacity": 0 } ], "audio": { "filename": "1.2-5.mp3", "startTime": 1, "startTimestamp": 27.38, "finishTimestamp": 29.06 } }, "commands": [
+    { "character": "David", "opacity": 1, "startTime": 0 },
     {
       "character": "David",
       "startTime": 1,
@@ -76,5 +56,4 @@ Refers to the act of being introduced to someone for the first time.
       "opacity": 0,
       "startTime": 3.18
     }
-  ]
-}
+  ] }
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e51218ff18f8191b76ea9.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e51218ff18f8191b76ea9.md
index ba5461308e4..96abb24af69 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e51218ff18f8191b76ea9.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e51218ff18f8191b76ea9.md
@@ -14,7 +14,7 @@ David: Wonderful to meet you all. I'm David, the project manager from FCC Corp.
 
 # --description--
 
-`Wonderful` is an adjective used to express that something is very good or pleasant. 
+`Wonderful` is an adjective used to express that something is very good or pleasant.
 
 `Corp.` is an abbreviation for `corporation`, which is a large company or group of companies.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e523fcaaa0e823b3789e5.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e523fcaaa0e823b3789e5.md
index 40ca02072cf..5787c4adf95 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e523fcaaa0e823b3789e5.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e523fcaaa0e823b3789e5.md
@@ -14,7 +14,7 @@ David: Wonderful to meet you all. I'm David, the project manager from FCC Corp.
 
 # --description--
 
-This task is designed to assess your understanding of David's introduction and his role within his organization. 
+This task is designed to assess your understanding of David's introduction and his role within his organization.
 
 # --question--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e539471b4aa82c7402c15.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e539471b4aa82c7402c15.md
index 8a540454cc3..68f89dff1f6 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e539471b4aa82c7402c15.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e539471b4aa82c7402c15.md
@@ -14,7 +14,7 @@ David: I’ll be your point of contact and I’ll help make sure our collaborati
 
 # --description--
 
-`Point of contact` refers to the person you can talk to or ask questions when you need help or information. 
+`Point of contact` refers to the person you can talk to or ask questions when you need help or information.
 
 This person acts as the main communicator or liaison for a specific matter or project. For example, `Laura is our point of contact for the new project` means you can go to Laura for information or assistance related to that project.
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e55e612fac9847dc7ce03.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e55e612fac9847dc7ce03.md
index e9fb1d292a1..5879734ba1c 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e55e612fac9847dc7ce03.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e55e612fac9847dc7ce03.md
@@ -14,7 +14,7 @@ AUDIO REFERENCE:
 
 # --description--
 
-The task focuses on expressions of enthusiasm and confidence in a project setting. 
+The task focuses on expressions of enthusiasm and confidence in a project setting.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e56e7034d2d858b6e9e00.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e56e7034d2d858b6e9e00.md
index 2944115c52d..0adf94c5d8a 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e56e7034d2d858b6e9e00.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e56e7034d2d858b6e9e00.md
@@ -14,7 +14,7 @@ David: Wonderful to meet you all. I'm David, the project manager from FCC Corp.
 
 # --description--
 
-In this task, you will focus on understanding references made in a conversation. 
+In this task, you will focus on understanding references made in a conversation.
 
 David uses the word `we` twice in his statement, each time referring to different groups. It's important in conversations to understand who is being talked about or represented, especially in professional settings.
 
@@ -22,11 +22,11 @@ David uses the word `we` twice in his statement, each time referring to differen
 
 ## --text--
 
-In David's statement, what do the two uses of `we` refer to? 
+In David's statement, what do the two uses of `we` refer to?
 
 ## --answers--
 
-Both refer to David and his team at FCC Corp. 
+Both refer to David and his team at FCC Corp.
 
 ### --feedback--
 
@@ -34,7 +34,7 @@ The second `we` is not just about FCC Corp.
 
 ---
 
-Both refer to the entire group, including Maria's team and FCC Corp. 
+Both refer to the entire group, including Maria's team and FCC Corp.
 
 ### --feedback--
 
@@ -42,11 +42,11 @@ Just the second `we` indicates the collaboration between both teams.
 
 ---
 
-The first `we` refers to Maria's team, and the second `we` refers to FCC Corp. 
+The first `we` refers to Maria's team, and the second `we` refers to FCC Corp.
 
 ### --feedback--
 
-This choice reverses the references. 
+This choice reverses the references.
 
 ---
 
diff --git a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e59605c6f688785fbb46d.md b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e59605c6f688785fbb46d.md
index 5b47fdc8271..82d196f1c79 100644
--- a/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e59605c6f688785fbb46d.md
+++ b/curriculum/challenges/korean/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657e59605c6f688785fbb46d.md
@@ -28,7 +28,7 @@ She is thanking David and ending the meeting.
 
 ### --feedback--
 
-This choice is incorrect. Maria is not ending the meeting. 
+This choice is incorrect. Maria is not ending the meeting.
 
 ---
 
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/24-game.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/24-game.md
index c51ae2bc20c..88cdeed88e7 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/24-game.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/24-game.md
@@ -24,10 +24,10 @@ Implement a function that takes a string of four digits as its argument, with ea
   <li> The order of the digits when given does not have to be preserved. </li>
 </ul>
 
-| Example input                 | Example output            |
-| ----------------------------- | ------------------------- |
-| <code>solve24("4878");</code> | <code>(7-8/8)\*4</code>   |
-| <code>solve24("1234");</code> | <code>3\*1\*4\*2</code>   |
+| Example input             | Example output            |
+| ------------------------- | ------------------------- |
+| <code>solve24("4878");</code> | <code>(7-8/8)\*4</code> |
+| <code>solve24("1234");</code> | <code>3\*1\*4\*2</code> |
 | <code>solve24("6789");</code> | <code>(6\*8)/(9-7)</code> |
 | <code>solve24("1127");</code> | <code>(1+7)\*(2+1)</code> |
 
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/balanced-brackets.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/balanced-brackets.md
index 9332dcea513..1de7c2352ce 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/balanced-brackets.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/balanced-brackets.md
@@ -13,11 +13,11 @@ Determine whether a generated string of brackets is balanced; that is, whether i
 **Examples:**
 | Input                     | Output |
 | ------------------------- | ------ |
-| <code>\[]</code>          | true   |
-| <code>]\[</code>          | false  |
-| <code>[][]</code>         | true   |
-| <code>]\[]</code>         | false  |
-| <code>\[]]\[\[]</code>    | false  |
+| <code>\[]</code> | true   |
+| <code>]\[</code> | false  |
+| <code>[][]</code> | true   |
+| <code>]\[]</code> | false  |
+| <code>\[]]\[\[]</code> | false  |
 | <code>\[\[\[\[]]]]</code> | true   |
 
 # --hints--
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md
index 9024a9ebd7c..f829063ec2b 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md
@@ -19,10 +19,10 @@ Demonstrate that it passes the following three test-cases:
 
 <div style='font-size:115%; font-weight: bold;'>Test Cases</div>
 
-| Input number | Output number                         |
-| ------------ | ------------------------------------- |
-| 7259         | <code>2 hr, 59 sec</code>             |
-| 86400        | <code>1 d</code>                      |
+| Input number | Output number             |
+| ------------ | ------------------------- |
+| 7259         | <code>2 hr, 59 sec</code> |
+| 86400        | <code>1 d</code> |
 | 6000000      | <code>9 wk, 6 d, 10 hr, 40 min</code> |
 
 <div style="font-size:115%; font-weight: bold;">Details</div>
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/cumulative-standard-deviation.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/cumulative-standard-deviation.md
index 893cca49aa5..2802c448aaa 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/cumulative-standard-deviation.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/cumulative-standard-deviation.md
@@ -18,12 +18,12 @@ $$\mu ={\frac {2+4+4+4+5+5+7+9}{8}}={\frac {40}{8}}=5$$
 
 First, calculate the deviations of each data point from the mean, and square the result of each:
 
-| Deviations of each data|  Square the result  |
-| ---------------------- | --------------------|
-| $(2-5)^{2}=(-3)^{2}=9$ | $(5-5)^{2}=0^{2}=0$ |
-| $(4-5)^{2}=(-1)^{2}=1$ | $(5-5)^{2}=0^{2}=0$ |
-| $(4-5)^{2}=(-1)^{2}=1$ | $(7-5)^{2}=2^{2}=4$ |
-| $(4-5)^{2}=(-1)^{2}=1$ | $(9-5)^{2}=4^{2}=16$|
+| Deviations of each data | Square the result    |
+| ----------------------- | -------------------- |
+| $(2-5)^{2}=(-3)^{2}=9$  | $(5-5)^{2}=0^{2}=0$  |
+| $(4-5)^{2}=(-1)^{2}=1$  | $(5-5)^{2}=0^{2}=0$  |
+| $(4-5)^{2}=(-1)^{2}=1$  | $(7-5)^{2}=2^{2}=4$  |
+| $(4-5)^{2}=(-1)^{2}=1$  | $(9-5)^{2}=4^{2}=16$ |
 
 The variance is the mean of these values:
 
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/discordian-date.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/discordian-date.md
index 2137292f8a2..bff43ccc37e 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/discordian-date.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/discordian-date.md
@@ -14,7 +14,7 @@ The <a href="http://www.rosettacode.org/wiki/Discordian_date" target="_blank" re
 The months, weekdays, Apostle events, and Holidays in the Discordian calendar are given by:
 
 Seasons: `'Chaos', 'Discord', 'Confusion', 'Bureaucracy', 'The Aftermath'`.
-  
+
 Weekdays: `'Sweetmorn', 'Boomtime', 'Pungenday', 'Prickle-Prickle', 'Setting Orange'`.
 
 Apostle: `'Mungday', 'Mojoday', 'Syaday', 'Zaraday', 'Maladay'`.
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/euler-method.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/euler-method.md
index 90628549c3f..184c5a06891 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/euler-method.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/euler-method.md
@@ -89,7 +89,7 @@ and compare with the analytical solution.
   <li>room temperature <big>$T_R$</big> shall be <code>20 °C</code></li>
   <li>cooling constant <big>$k$</big> shall be <code>0.07</code></li>
   <li>time interval to calculate shall be from <code>0 s</code> to <code>100 s</code></li>
-</ul>  
+</ul>
 
 First parameter to the function is initial time, second parameter is initial temperature, third parameter is elapsed time and fourth parameter is step size.
 
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/factorial.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/factorial.md
index a6a6e87f1aa..b23a92b26d0 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/factorial.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/factorial.md
@@ -15,7 +15,7 @@ Factorial of a number is given by:
 <pre><big>n! = n * (n-1) * (n-2) * ..... * 1</big>
 </pre>
 
-For example:
+예시:
 
 <ul>
   <li><code>3! = 3 * 2 * 1 = 6</code></li>
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/hash-from-two-arrays.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/hash-from-two-arrays.md
index 75facd682ab..2c2aae54771 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/hash-from-two-arrays.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/hash-from-two-arrays.md
@@ -10,7 +10,7 @@ dashedName: hash-from-two-arrays
 
 Given two arrays, create a hash object where the elements from one array (the keys) are linked to the elements of the other (the values).
 
-Example:
+예:
 
 ```js
 const firstArr = [1, 2, 3];
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/hofstadter-figure-figure-sequences.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/hofstadter-figure-figure-sequences.md
index debc5f4db0a..e05d87270f2 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/hofstadter-figure-figure-sequences.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/hofstadter-figure-figure-sequences.md
@@ -28,9 +28,7 @@ Create two functions named `ffr` and `ffs` that return `R(n)` or `S(n)`, respect
 
 No maximum value for `n` should be assumed.
 
-**References**
-
- <p>Rosetta: <a href='https://rosettacode.org/wiki/Hofstadter_Figure-Figure_sequences' target='_blank'>Hofstadter Figure-Figure sequences</a></p>.
+**References**<p>Rosetta: <a href='https://rosettacode.org/wiki/Hofstadter_Figure-Figure_sequences' target='_blank'>Hofstadter Figure-Figure sequences</a></p>.
 
 
 # --hints--
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/least-common-multiple.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/least-common-multiple.md
index a3c747b6523..d84da1b8b61 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/least-common-multiple.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/least-common-multiple.md
@@ -8,11 +8,9 @@ dashedName: least-common-multiple
 
 # --description--
 
-The least common multiple of 12 and 18 is 36, because 12 is a factor (12 × 3 = 36), and 18 is a factor (18 × 2 = 36), and there is no positive integer less than 36 that has both factors. As a special case, if either $m$ or $n$ is zero, then the least common multiple is zero. One way to calculate the least common multiple is to iterate all the multiples of $m$, until you find one that is also a multiple of $n$. If you already have $gcd$ for <a href="https://rosettacode.org/wiki/Greatest_common_divisor" target="_blank" rel="noopener noreferrer nofollow">greatest common divisor</a>, then this formula calculates $lcm$. 
+The least common multiple of 12 and 18 is 36, because 12 is a factor (12 × 3 = 36), and 18 is a factor (18 × 2 = 36), and there is no positive integer less than 36 that has both factors. As a special case, if either $m$ or $n$ is zero, then the least common multiple is zero. One way to calculate the least common multiple is to iterate all the multiples of $m$, until you find one that is also a multiple of $n$. If you already have $gcd$ for <a href="https://rosettacode.org/wiki/Greatest_common_divisor" target="_blank" rel="noopener noreferrer nofollow">greatest common divisor</a>, then this formula calculates $lcm$.
 
-$$
-\\operatorname{lcm}(m, n) = \\frac{|m \\times n|}{\\operatorname{gcd}(m, n)}
-$$
+$$ \\operatorname{lcm}(m, n) = \\frac{|m \\times n|}{\\operatorname{gcd}(m, n)} $$
 
 # --instructions--
 
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/levenshtein-distance.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/levenshtein-distance.md
index 89e9379aff2..e857af51f52 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/levenshtein-distance.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/levenshtein-distance.md
@@ -10,7 +10,7 @@ dashedName: levenshtein-distance
 
 In information theory and computer science, the **Levenshtein distance** is a metric for measuring the amount of difference between two sequences (i.e. an edit distance). The Levenshtein distance between two strings is defined as the minimum number of edits needed to transform one string into the other, with the allowable edit operations being insertion, deletion, or substitution of a single character.
 
-Example:
+예:
 
 The Levenshtein distance between "**kitten**" and "**sitting**" is 3, since the following three edits change one into the other, and there isn't a way to do it with fewer than three edits:
 
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sailors-coconuts-and-a-monkey-problem.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sailors-coconuts-and-a-monkey-problem.md
index 32c0af13202..8117215835e 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sailors-coconuts-and-a-monkey-problem.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sailors-coconuts-and-a-monkey-problem.md
@@ -8,11 +8,11 @@ dashedName: sailors-coconuts-and-a-monkey-problem
 
 # --description--
 
-Five sailors are shipwrecked on an island and collect a large pile of coconuts during the day. 
+Five sailors are shipwrecked on an island and collect a large pile of coconuts during the day.
 
-That night the first sailor wakes up and decides to take his first share early so tries to divide the pile of coconuts equally into five piles but finds that there is one coconut left over, so he tosses it to a monkey and then hides "his" one of the five equally sized piles of coconuts and pushes the other four piles together to form a single visible pile of coconuts again and goes to bed. 
+That night the first sailor wakes up and decides to take his first share early so tries to divide the pile of coconuts equally into five piles but finds that there is one coconut left over, so he tosses it to a monkey and then hides "his" one of the five equally sized piles of coconuts and pushes the other four piles together to form a single visible pile of coconuts again and goes to bed.
 
-To cut a long story short, each of the sailors in turn gets up once during the night and performs the same actions of dividing the coconut pile into five, finding that one coconut is left over and giving that single remainder coconut to the monkey, then push the other four piles together to form a single pile. 
+To cut a long story short, each of the sailors in turn gets up once during the night and performs the same actions of dividing the coconut pile into five, finding that one coconut is left over and giving that single remainder coconut to the monkey, then push the other four piles together to form a single pile.
 
 In the morning (after the surreptitious and separate action of each of the five sailors during the night), the remaining coconuts are divided into five equal piles for each of the sailors, whereupon it is found that the pile of coconuts divides equally amongst the sailors with no remainder. (Nothing for the monkey in the morning.)
 
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sedols.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sedols.md
index ca0b378bdfe..9ace124614e 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sedols.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sedols.md
@@ -67,7 +67,7 @@ assert(sedol('228276') === '2282765');
 ```js
 function sedol(input) {
   const checkSum = 0
-  
+
   return checkSum;
 }
 ```
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/self-describing-numbers.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/self-describing-numbers.md
index c3c93dbfa70..dc5318141ce 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/self-describing-numbers.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/self-describing-numbers.md
@@ -89,7 +89,7 @@ function isSelfDescribing(n) {
     if (digits.length != count.length) {
         return false;
     }
-    
+
     for (let i=0; i< digits.length; i++){
       if (digits[i] !== count[i]) {
         return false;
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sha-256.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sha-256.md
index 68894b5a985..c0ef963ee80 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sha-256.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sha-256.md
@@ -8,8 +8,7 @@ dashedName: sha-256
 
 # --description--
 
-The `SHA-2` family is a stronger alternative to `SHA-1`. The main difference between them is the length of the hash.
-Meaning `SHA-1` provides a shorter code with fewer possibilities for unique combinations. `SHA-2` or `SHA-256` creates a longer and thus more complex hash with more possibilities.
+The `SHA-2` family is a stronger alternative to `SHA-1`. The main difference between them is the length of the hash. Meaning `SHA-1` provides a shorter code with fewer possibilities for unique combinations. `SHA-2` or `SHA-256` creates a longer and thus more complex hash with more possibilities.
 
 # --instructions--
 
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-strand-sort.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-strand-sort.md
index 0c4d197eef9..af66009395b 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-strand-sort.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-strand-sort.md
@@ -8,7 +8,7 @@ dashedName: sorting-algorithmsstrand-sort
 
 # --description--
 
-The **Strand sort** creates sorted subsets that are merged to create the final result. 
+The **Strand sort** creates sorted subsets that are merged to create the final result.
 
 Consider an `unsortedArray = [3, 1, 4, 2]`. Pick the first item `3` and copy it into a separate array. Search for any bigger item following this item. When you find the a larger item, in this case `4`, copy it to the separate array, `[3, 4]`, and compare the following items to this new value, `4`.
 
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/soundex.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/soundex.md
index 3072f3139f2..72f684886f0 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/soundex.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/soundex.md
@@ -8,17 +8,17 @@ dashedName: soundex
 
 # --description--
 
-**Soundex Algorithm** deals with the *intentions* of the words. It creates a representation for similar sounding words. 
+**Soundex Algorithm** deals with the *intentions* of the words. It creates a representation for similar sounding words.
 
 It is used for searching <em>names</em> and <em>addresses</em>. This means that the person who filled in the <em>name</em>, can focus on how it sounds instead of correcting the spelling of <em>names</em>.
 
-For example: 
+예시:
 
-If you are hearing the name `Quenci` for the first time, and misspelled it, you will get **Soundex** code `Q520`. 
+If you are hearing the name `Quenci` for the first time, and misspelled it, you will get **Soundex** code `Q520`.
 
-When you spell the name `Quincy` correctly next time, you will still get the same code `Q520`, which means you can link multiple name pronunciations into the same <em>person</em> without the need for adding every spelling. 
+When you spell the name `Quincy` correctly next time, you will still get the same code `Q520`, which means you can link multiple name pronunciations into the same <em>person</em> without the need for adding every spelling.
 
-Here is the rules: 
+Here is the rules:
 
 <ul>
   <li>If a vowel (A, E, I, O, U) separates two consonants that have the same soundex code, the consonant to the right of the vowel is coded. Tymczak is coded as T-522 (T, 5 for the M, 2 for the C, Z ignored (see "Side-by-Side" rule above), 2 for the K). Since the vowel "A" separates the Z and K, the K is coded.</li>
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sum-to-100.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sum-to-100.md
index e616195233d..fcf760ced2b 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sum-to-100.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/sum-to-100.md
@@ -12,7 +12,7 @@ Find solutions to the *sum to one hundred* puzzle.
 
 Add (insert) the mathematical operators **+** or **─** (plus or minus) before any of the digits in the decimal numeric string **123456789** such that the resulting mathematical expression adds up to a particular sum (in this iconic case, **100**).
 
-Example:
+예:
 
 <pre><b>123 + 4 - 5 + 67 - 89   =   100</b></pre>
 
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/symmetric-difference.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/symmetric-difference.md
index bf8d98a2c7f..5ad502e6a2f 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/symmetric-difference.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/symmetric-difference.md
@@ -10,7 +10,7 @@ dashedName: symmetric-difference
 
 Given two sets *A* and *B*, compute $(A \\setminus B) \\cup (B \\setminus A).$ That is, enumerate the items that are in *A* or *B* but not both. This set is called the symmetric difference of *A* and *B*. In other words: $(A \\cup B) \\setminus (A \\cap B)$ (the set of items that are in at least one of *A* or *B* minus the set of items that are in both *A* and *B*).
 
-Example:
+예:
 
 For sets `A = [1, 2, 3]`, and `B = [1, 3, 4]`, the symmetric difference of *A* and *B* is `[2, 4]`.
 
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/towers-of-hanoi.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/towers-of-hanoi.md
index 3ab836e3745..596164f14b5 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/towers-of-hanoi.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/towers-of-hanoi.md
@@ -9,7 +9,7 @@ dashedName: towers-of-hanoi
 # --description--
 
 Solve the Towers of Hanoi problem. The number of objects will be given as the first parameter, followed by the strings used to identify each stack of objects. Create a nested array containing the list of moves, `["source", "destination"]`.
- 
+
 For example, the parameters `(4, 'A', 'B', 'C')`, will result in nested array of moves `[['A', 'C'], ['B', 'A']]`, indicating that the 1st move was to move an object from stack `A` to `C` and the 2nd move was to move an object from stack `B` to `A`.
 
 # --instructions--
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/y-combinator.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/y-combinator.md
index bd770f28f50..0c867176bc4 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/y-combinator.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/y-combinator.md
@@ -14,7 +14,7 @@ The Y combinator is itself a stateless function that, when applied to another st
 
 # --instructions--
 
-Define the stateless Y combinator function and use it to compute the factorials. The `factorial(N)` function is already given to you. 
+Define the stateless Y combinator function and use it to compute the factorials. The `factorial(N)` function is already given to you.
 
 # --hints--
 
diff --git a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/zhang-suen-thinning-algorithm.md b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/zhang-suen-thinning-algorithm.md
index 6f8cf62dafa..16b17783ed3 100644
--- a/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/zhang-suen-thinning-algorithm.md
+++ b/curriculum/challenges/korean/22-rosetta-code/rosetta-code-challenges/zhang-suen-thinning-algorithm.md
@@ -44,12 +44,7 @@ It produces the thinned output:
 
 Assume black pixels are one and white pixels zero, and that the input image is a rectangular N by M array of ones and zeroes. The algorithm operates on all black pixels P1 that can have eight neighbours. The neighbours are, in order, arranged as:
 
-$$\begin{array}{|c|c|c|}
-  \\hline
-  P9 & P2              & P3\\\\ \\hline
-  P8 & \boldsymbol{P1} & P4\\\\ \\hline
-  P7 & P6              & P5\\\\ \\hline
-\end{array}$$
+$$\begin{array}{|c|c|c|} \\hline P9 & P2              & P3\\\\ \\hline P8 & \boldsymbol{P1} & P4\\\\ \\hline P7 & P6              & P5\\\\ \\hline \end{array}$$
 
 Obviously the boundary pixels of the image cannot have the full eight neighbours.
 
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/build-your-own-functions.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/build-your-own-functions.md
index 88df8138e5b..adb4d9ebbfd 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/build-your-own-functions.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/build-your-own-functions.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f060b6c005b0e76f05b
-title: Build your own Functions
+title: 나만의 함수 만들기
 challengeType: 11
 videoId: nLDychdBwUg
 bilibiliIds:
@@ -20,7 +20,7 @@ More resources:
 
 ## --text--
 
-What will the following Python program print out?:
+다음 파이썬 프로그램은 무엇을 출력하나요?:
 
 ```python
 def fred():
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/comparing-and-sorting-tuples.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/comparing-and-sorting-tuples.md
index dc30911a305..1bf548f6eda 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/comparing-and-sorting-tuples.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/comparing-and-sorting-tuples.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f0b0b6c005b0e76f06d
-title: Comparing and Sorting Tuples
+title: 튜플 비교 및 정렬
 challengeType: 11
 videoId: dZXzBXUxxCs
 bilibiliIds:
@@ -20,7 +20,7 @@ More resources:
 
 ## --text--
 
-Which does the same thing as the following code?:
+다음 코드와 동일한 작업을 하는 코드는 무엇인가요?
 
 ```python
 lst = []
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/conditional-execution.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/conditional-execution.md
index c7e87b2f7ed..cf1f792f158 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/conditional-execution.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/conditional-execution.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f050b6c005b0e76f058
-title: Conditional Execution
+title: 조건부 실행
 challengeType: 11
 videoId: gz_IfIsZQtc
 bilibiliIds:
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/dictionaries-and-loops.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/dictionaries-and-loops.md
index f01b3320828..c2771b06582 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/dictionaries-and-loops.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/dictionaries-and-loops.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f0a0b6c005b0e76f069
-title: Dictionaries and Loops
+title: 사전 및 루프
 challengeType: 11
 videoId: EEmekKiKG70
 bilibiliIds:
@@ -20,7 +20,7 @@ More resources:
 
 ## --text--
 
-What will the following code print?:
+다음 코드는 무엇을 출력하나요?:
 
 ```python
 counts = { 'chuck' : 1 , 'annie' : 42, 'jan': 100}
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/dictionaries-common-applications.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/dictionaries-common-applications.md
index aef8d142872..978f13dfa45 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/dictionaries-common-applications.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/dictionaries-common-applications.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f090b6c005b0e76f068
-title: 'Dictionaries: Common Applications'
+title: '사전: 일반적인 응용'
 challengeType: 11
 videoId: f17xPfIXct0
 bilibiliIds:
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/files-as-a-sequence.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/files-as-a-sequence.md
index 75d21cc8994..db1a77c4fe8 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/files-as-a-sequence.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/files-as-a-sequence.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f080b6c005b0e76f063
-title: Files as a Sequence
+title: 파일을 시퀀스로
 challengeType: 11
 videoId: cIA0EokbaHE
 bilibiliIds:
@@ -20,23 +20,23 @@ More resources:
 
 ## --text--
 
-What does the word 'continue' do in the middle of a loop?
+루프 중간에 'continue'라는 단어는 무엇을 하나요?
 
 ## --answers--
 
-Skips to the code directly after the loop.
+루프 바로 뒤의 코드로 건너뜁니다.
 
 ---
 
-Skips to the next line in the code.
+코드의 다음 줄로 건너뜁니다.
 
 ---
 
-Skips to the next iteration of the loop.
+루프의 다음 반복으로 건너뜁니다.
 
 ---
 
-Skips the next block of code.
+다음 코드 블록을 건너뜁니다.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/intermediate-strings.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/intermediate-strings.md
index c2bcadfe2b0..d7637c291c0 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/intermediate-strings.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/intermediate-strings.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f070b6c005b0e76f061
-title: Intermediate Strings
+title: 중급 문자열
 challengeType: 11
 videoId: KgT_fYLXnyk
 bilibiliIds:
@@ -20,7 +20,7 @@ More resources:
 
 ## --text--
 
-What is the value of i in the following code?
+다음 코드에서 i의 값은 무엇인가요?
 
 ```python
 word = "bananana"
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-elements-of-python.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-elements-of-python.md
index 8b4f0cda163..66ad509e13d 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-elements-of-python.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-elements-of-python.md
@@ -1,6 +1,6 @@
 ---
 id: 5e6a54c358d3af90110a60a3
-title: 'Introduction: Elements of Python'
+title: '소개: 파이썬의 요소'
 challengeType: 11
 videoId: aRY_xjL35v0
 bilibiliIds:
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-hardware-achitecture.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-hardware-achitecture.md
index ca70295ff28..6c3e683e239 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-hardware-achitecture.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-hardware-achitecture.md
@@ -1,6 +1,6 @@
 ---
 id: 5e6a54af58d3af90110a60a1
-title: 'Introduction: Hardware Architecture'
+title: '소개: 하드웨어 구조'
 challengeType: 11
 videoId: H6qtjRTfSog
 bilibiliIds:
@@ -18,15 +18,15 @@ Where are your programs stored when they are running?
 
 ## --answers--
 
-Hard Drive.
+하드 드라이브
 
 ---
 
-Memory.
+메모리
 
 ---
 
-Central Processing Unit.
+CPU
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-python-as-a-language.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-python-as-a-language.md
index a5d07b24723..369b63bf6d9 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-python-as-a-language.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-python-as-a-language.md
@@ -1,6 +1,6 @@
 ---
 id: 5e6a54ba58d3af90110a60a2
-title: 'Introduction: Python as a Language'
+title: '소개: 파이썬 언어'
 challengeType: 11
 videoId: 0QeGbZNS_bY
 bilibiliIds:
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-why-program.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-why-program.md
index 0d33e12e8f9..fdddb5895f1 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-why-program.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/introduction-why-program.md
@@ -1,6 +1,6 @@
 ---
 id: 5e6a54a558d3af90110a60a0
-title: 'Introduction: Why Program?'
+title: '소개: 왜 프로그래밍을 배워야 하나요?'
 challengeType: 11
 videoId: 3muQV-Im3Z0
 bilibiliIds:
@@ -26,11 +26,11 @@ More resources:
 
 ## --text--
 
-Who should learn to program?
+누가 프로그래밍을 배워야 하나요?
 
 ## --answers--
 
-College students.
+대학생
 
 ### --feedback--
 
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/iterations-definite-loops.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/iterations-definite-loops.md
index 7e1ed038bca..de965776a09 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/iterations-definite-loops.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/iterations-definite-loops.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f070b6c005b0e76f05d
-title: 'Iterations: Definite Loops'
+title: '반복: 유한정 반복 루프'
 challengeType: 11
 videoId: hiRTRAqNlpE
 bilibiliIds:
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/iterations-loop-idioms.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/iterations-loop-idioms.md
index 70a07c31848..2c6105cada2 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/iterations-loop-idioms.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/iterations-loop-idioms.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f070b6c005b0e76f05e
-title: 'Iterations: Loop Idioms'
+title: '반복: 루프 관용구'
 challengeType: 11
 videoId: AelGAcoMXbI
 bilibiliIds:
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/iterations-more-patterns.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/iterations-more-patterns.md
index d0c75d1cd52..649277f3d26 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/iterations-more-patterns.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/iterations-more-patterns.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f070b6c005b0e76f05f
-title: 'Iterations: More Patterns'
+title: '반복: 더 많은 패턴'
 challengeType: 11
 videoId: 9Wtqo6vha1M
 bilibiliIds:
@@ -20,7 +20,7 @@ More resources:
 
 ## --text--
 
-Which of these evaluates to False?
+다음 중 거짓인 코드는 무엇인가요?
 
 ## --answers--
 
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/loops-and-iterations.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/loops-and-iterations.md
index 51ed9ff4dbc..51002363e76 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/loops-and-iterations.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/loops-and-iterations.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f060b6c005b0e76f05c
-title: Loops and Iterations
+title: 루프와 반복
 challengeType: 11
 videoId: dLA-szNRnUY
 bilibiliIds:
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/more-conditional-structures.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/more-conditional-structures.md
index 3ef5463b743..1ec2962ee60 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/more-conditional-structures.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/more-conditional-structures.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f060b6c005b0e76f059
-title: More Conditional Structures
+title: 더 많은 조건부 구조들
 challengeType: 11
 videoId: HdL82tAZR20
 bilibiliIds:
@@ -22,7 +22,7 @@ More resources:
 
 ## --text--
 
-Given the following code:
+다음 코드가 제공됩니다:
 
 ```python
 temp = "5 degrees"
@@ -32,7 +32,7 @@ cel = (fahr - 32.0) * 5.0 / 9.0
 print(cel)
 ```
 
-Which line/lines should be surrounded by `try` block?
+어떤 줄(들)이 `try` 블록으로 둘러싸져야 하나요?
 
 ## --answers--
 
@@ -52,7 +52,7 @@ Which line/lines should be surrounded by `try` block?
 
 ---
 
-None
+없음
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/python-dictionaries.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/python-dictionaries.md
index 962ec931113..48a9a2db94a 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/python-dictionaries.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/python-dictionaries.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f090b6c005b0e76f067
-title: Python Dictionaries
+title: 파이썬 사전
 challengeType: 11
 videoId: dnzvfimrRMg
 bilibiliIds:
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/python-functions.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/python-functions.md
index 3b5ea72b3c7..78162f89cc3 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/python-functions.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/python-functions.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f060b6c005b0e76f05a
-title: Python Functions
+title: 파이썬 함수
 challengeType: 11
 videoId: 3JGF-n3tDPU
 bilibiliIds:
@@ -18,23 +18,23 @@ What is the purpose of the "def" keyword in Python?
 
 ## --answers--
 
-It is slang that means "The following code is really cool."
+"다음 코드는 정말 멋지다"는 뜻의 속어입니다.
 
 ---
 
-It indicates the start of a function.
+함수의 시작을 나타냅니다.
 
 ---
 
-It indicates that the following indented section of code is to be stored for later.
+이 다음 코드의 들여쓰기가 나중에 사용하기 위해 저장된다는 것을 나타냅니다.
 
 ---
 
-It indicates the start of a function, and the following indented section of code is to be stored for later.
+함수의 시작을 나타내며, 이 다음 코드의 들여쓰기가 나중에 사용하기 위해 저장된다는 것을 나타냅니다.
 
 ---
 
-None of the above.
+위의 어느 것도 아님.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/python-lists.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/python-lists.md
index 4266a29a5e0..854de648da4 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/python-lists.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/python-lists.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f080b6c005b0e76f064
-title: Python Lists
+title: 파이썬 목록
 challengeType: 11
 videoId: Y0cvfDpYC_c
 bilibiliIds:
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/reading-files.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/reading-files.md
index c4cc75d8e4d..638eb1bbcd6 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/reading-files.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/reading-files.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f080b6c005b0e76f062
-title: Reading Files
+title: 파일 읽기
 challengeType: 11
 videoId: Fo1tW09KIwo
 bilibiliIds:
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/relational-databases-and-sqlite.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/relational-databases-and-sqlite.md
index 57f4dd9e0d7..5ccae62f4f9 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/relational-databases-and-sqlite.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/relational-databases-and-sqlite.md
@@ -12,9 +12,9 @@ dashedName: relational-databases-and-sqlite
 
 # --description--
 
-<a href="https://www.sqlite.org/download.html" target="_blank" rel="noopener noreferrer nofollow">Download SQLite</a>  
-<a href="https://sqlitebrowser.org/dl/" target="_blank" rel="noopener noreferrer nofollow">Download DB Browser for SQLite</a>  
-<a href="https://www.sqlite.org/famous.html" target="_blank" rel="noopener noreferrer nofollow">SQLite usage</a>  
+<a href="https://www.sqlite.org/download.html" target="_blank" rel="noopener noreferrer nofollow">Download SQLite</a>
+<a href="https://sqlitebrowser.org/dl/" target="_blank" rel="noopener noreferrer nofollow">Download DB Browser for SQLite</a>
+<a href="https://www.sqlite.org/famous.html" target="_blank" rel="noopener noreferrer nofollow">SQLite usage</a>
 
 # --question--
 
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/strings-and-lists.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/strings-and-lists.md
index 9ba1ca3e9c8..27fd4ca9d15 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/strings-and-lists.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/strings-and-lists.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f090b6c005b0e76f066
-title: Strings and Lists
+title: 문자열과 목록
 challengeType: 11
 videoId: lxcFa7ldCi0
 bilibiliIds:
@@ -20,7 +20,7 @@ More resources:
 
 ## --text--
 
-What does n equal in this code?
+이 코드에서 n은 무엇인가요?
 
 ```python
 words = 'His e-mail is q-lar@freecodecamp.org'
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/strings-in-python.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/strings-in-python.md
index 25d7a36267e..88c17276126 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/strings-in-python.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/strings-in-python.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f070b6c005b0e76f060
-title: Strings in Python
+title: 파이썬의 문자열
 challengeType: 11
 videoId: LYZj207fKpQ
 bilibiliIds:
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/the-tuples-collection.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/the-tuples-collection.md
index a5bdb4ead0d..742e778df84 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/the-tuples-collection.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/the-tuples-collection.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f0a0b6c005b0e76f06c
-title: The Tuples Collection
+title: 튜플 컬렉션
 challengeType: 11
 videoId: 3Lxpladfh2k
 bilibiliIds:
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/variables-expressions-and-statements.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/variables-expressions-and-statements.md
index 09fc7f3864e..cf1dcf42a7d 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/variables-expressions-and-statements.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/variables-expressions-and-statements.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f050b6c005b0e76f056
-title: 'Variables, Expressions, and Statements'
+title: '변수, 표현식 및 조건문'
 challengeType: 11
 videoId: nELR-uyyrok
 bilibiliIds:
diff --git a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/working-with-lists.md b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/working-with-lists.md
index b6712797e7d..f93c0500632 100644
--- a/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/working-with-lists.md
+++ b/curriculum/challenges/korean/23-python-for-everybody/python-for-everybody/working-with-lists.md
@@ -1,6 +1,6 @@
 ---
 id: 5e7b9f090b6c005b0e76f065
-title: Working with Lists
+title: 목록 작업
 challengeType: 11
 videoId: lCnHfTHkhbE
 bilibiliIds:
diff --git a/curriculum/challenges/portuguese/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md b/curriculum/challenges/portuguese/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
index 8ef3c117389..17092d557c7 100644
--- a/curriculum/challenges/portuguese/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
+++ b/curriculum/challenges/portuguese/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
@@ -22,7 +22,8 @@ Complete a função usando as regras abaixo para modificar o objeto passado para
 -   A função precisa sempre retornar todo o objeto `records`.
 -   Se `value` for uma string vazia, remova a propriedade `prop` recebida do álbum.
 -   Se `prop` não for `tracks` e `value` não for uma string vazia, atribua `value` à `prop` daquele álbum.
--   Se `prop` for `tracks` e `value` não for uma string vazia, você precisa atualizar o array `tracks` do álbum. Primeiro, se o álbum não tiver uma propriedade `tracks`, atribua a ele um array vazio. Em seguida, adicione `value` como o último item do array `tracks` do álbum.
+-   Se `prop` for `tracks` e `value` não for uma string vazia e se o álbum não tiver uma propriedade `tracks`, crie um array vazio e adicione `value` a ele.
+-   Se prop for `tracks` e `value` não for uma string vazia, adicione `value` ao final do array existente de `tracks` do álbum.
 
 **Observação:** uma cópia do objeto `recordCollection` é usada para testes. Você não deve modificar diretamente o objeto `recordCollection`.
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
index e7bd4b50336..c18bf7f6142 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
@@ -19,8 +19,8 @@ You should use the `append()` method to append `start` to `paths[start]`.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\.append\s*\(\s*start\s*\)/m));
+    const {function_body} = shortest;
+    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\s*\.append\s*\(\s*start\s*\)/m));
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
index 168c6f4923b..b4ffd9fcc5e 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
@@ -27,8 +27,8 @@ You should call `extend()` on the neighbour node path passing the current node p
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
index 8b0763c4106..4234877e536 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
@@ -16,8 +16,8 @@ You should append `node` to `paths[node]` just after your `else` statement.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\.append\s*\(\s*node\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\s*\.append\s*\(\s*node\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
index 6955e5b8e63..adea36aec54 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
@@ -28,7 +28,7 @@ You should print the provided string inside your new `for` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
+    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(\s*f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
index 09a607ac92f..d744d06184c 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
@@ -7,43 +7,43 @@ dashedName: step-49
 
 # --description--
 
-Python provides a concise way to write `if`/`else` conditionals by using the ternary syntax:
+O Python fornece uma maneira concisa de escrever as condicionais `if`/`else` usando a sintaxe ternária:
 
 ```py
 val_1 if condition else val_2
 ```
 
-The expression above evaluates to `val_1` if `condition` is true, otherwise to `val_2`.
+A expressão acima pode ser entendida como `val_1` se `condition` for verdadeira; caso contrário, `val_2`.
 
-Delete your `print` call and create a variable called `targets_to_print` after your `while` loop. Use the ternary syntax to assign it `[target]` when `target` is truthy, and `graph` otherwise.
+Exclua sua chamada `print` e crie uma variável chamada `targets_to_print` após o laço `while`. Use a sintaxe ternária para atribuir `[target]` à ela quando `target` for verdadeiro e `graph` quando for falso.
 
 
 # --hints--
 
-You should delete your `print` call.
+Você deve excluir a chamada de `print`.
 
 ```js
 ({ test: () => assert.isFalse( /print\s*\(\s*f("|')Unvisited:\s*\{\s*unvisited\s*\}\\nDistances:\s\{\s*distances\s*\}\\nPaths:\s\{\s*paths\s*\}\1\s*\)/.test(code)) })
 ```
 
-You should create a variable called `targets_to_print` after your `while` loop.
+Você deve criar uma variável chamada `targets_to_print` após o laço `while`.
 
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=/ms));
   }
 })
 ```
 
-You should the ternary syntax to assign `[target]` when `target` is truthy, and `graph` otherwise to your `targets_to_print` variable.
+Você deve usar a sintaxe ternária para atribuir `[target]` quando `target` for verdadeiro e `graph` quando for falso à variável `targets_to_print`.
 
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d86fe1b8947954b9178d.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d86fe1b8947954b9178d.md
index 86ac3d85f8a..ff41e2ea362 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d86fe1b8947954b9178d.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d86fe1b8947954b9178d.md
@@ -7,13 +7,13 @@ dashedName: step-51
 
 # --description--
 
-Now it's better but you don't want to print the details about the starting node.
+Agora está melhor, mas você não deseja imprimir os detalhes sobre o nó inicial.
 
-Before the `print` call, add an `if` statement to execute when `node` is equal to `start` and use the `continue` keyword to go to the next loop iteration.
+Antes da chamada de `print`, adicione uma instrução `if` para executar quando `node` for igual a `start` e use a palavra-chave `continue` para ir para a próxima iteração do laço.
 
 # --hints--
 
-You should nest an `if` statement to check that `node` is equal to `start` inside your `for` loop.
+Você deve aninhar um comando `if` para verificar que `node` é igual a `start` dentro do laço `for`.
 
 ```js
 ({ test: () =>  {
@@ -24,7 +24,7 @@ You should nest an `if` statement to check that `node` is equal to `start` insid
 })
 ```
 
-You should use the `continue` keyword to go to the next iteration inside your new `if` statement.
+Você deve usar a palavra-chave `continue` para ir para a próxima iteração dentro do novo comando`if`.
 
 ```js
 ({ test: () =>  {
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da1b7d75f088f5e6b89f.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da1b7d75f088f5e6b89f.md
index 13fea3113fb..fdaff3e028e 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da1b7d75f088f5e6b89f.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da1b7d75f088f5e6b89f.md
@@ -7,11 +7,11 @@ dashedName: step-52
 
 # --description--
 
-Finally, at the very end of your function, return `distances` and `paths`.
+Por fim, ao final da função, retorne `distances` e `paths`.
 
 # --hints--
 
-You should return `distances` and `paths` at the bottom of your function.
+Você deve retornar `distances` e `paths` ao final da função.
 
 ```js
 ({ test: () =>  {
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da93115de78dbbdc7ba3.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da93115de78dbbdc7ba3.md
index 9a599873ab0..27213b88ba6 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da93115de78dbbdc7ba3.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559da93115de78dbbdc7ba3.md
@@ -7,13 +7,13 @@ dashedName: step-54
 
 # --description--
 
-As a final step, modify your function call passing `F` as the third argument and check the output.
+Como etapa final, modifique a chamada da função passando `F` como o terceiro argumento e confira a saída.
 
-With that, the shortest path algorithm is complete.
+Assim, o algoritmo de caminho mais curto está completo.
 
 # --hints--
 
-You should call `shortest_path` passing `my_graph`, `'A'` and `'F'` as the arguments.
+Você deve chamar `shortest_path` passando `my_graph`, `'A'` e `'F'` como argumentos.
 
 ```js
 ({ test: () => assert.match(code, /^shortest_path\s*\(\s*my_graph\s*,\s*("|')A\1\s*,\s*("|')F\2\s*\)/m) })
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6578b57361f2f132a02e2a18.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6578b57361f2f132a02e2a18.md
index 662fb504859..923628915de 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6578b57361f2f132a02e2a18.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6578b57361f2f132a02e2a18.md
@@ -7,7 +7,7 @@ dashedName: step-4
 
 # --description--
 
-You can access the data stored in a dictionary through its keys:
+Você pode acessar os dados armazenados em um dicionário por meio das suas chaves:
 
 ```py
 my_dict = {
@@ -18,11 +18,11 @@ my_dict = {
 my_dict['name'] # 'Michael'
 ```
 
-After your dictionary, follow the example above to access the `species` key of `copper` and print the result.
+Depois do dicionário, siga o exemplo abaixo para acessar a chave `species` de `copper` e exiba o resultado.
 
 # --hints--
 
-You should not modify your dictionary.
+Você não deve modificar seu dicionário.
 
 ```js
 ({ test: () => assert(__pyodide.runPython(`
@@ -32,13 +32,13 @@ You should not modify your dictionary.
 })
 ```
 
-You should use `copper['species']` to access the value of the `species` key.
+Você deve usar `copper['species']` para acessar o valor da chave `species`.
 
 ```js
 ({ test: () => assert.match(code, /copper\s*\[\s*("|')species\1\s*\]/) })
 ```
 
-You should call `print()` passing `copper['species']` as argument.
+Você deve chamar `print()` passando `copper['species']` como argumento.
 
 ```js
 ({ test: () => assert.match(code, /^print\s*\(\s*copper\s*\[\s*("|')species\1\s*\]\s*\)/m) })
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
index 2d51dd6fb21..1145cc88df6 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
@@ -25,7 +25,7 @@ Just before your `print()` call, use the `del` keyword to delete the `age` key a
 You should use the `del` keyword to delete `copper['age']` before the `print()` call.
 
 ```js
-({ test: () => assert.match(code, /^del\s+copper\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
+({ test: () => assert.match(code, /^del\s+copper\s*\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
index b23c4359421..872f776e28a 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
@@ -24,7 +24,7 @@ Create an `__init__` method inside your `Board` class.
 Your method should be named `__init__`. Don't add any parameters.
 
 ```js
-assert.match(code, / +def\s+__init__\s*\(\)\:/);
+assert.match(code, / +def\s+__init__\s*\(\s*\)\:/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
index f4240bec3c9..01b75ba59bc 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
@@ -43,7 +43,6 @@ class Board:
 --fcc-editable-region--
         for index, line in enumerate(self.board):
           row_list = []
-          
+
 --fcc-editable-region--
 ```
-
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
index 1cb6f5b1cce..0ad68ac795f 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
@@ -16,7 +16,7 @@ Use list slicing to create the three lists of equal length representing the `lin
 You should have `enumerate([line[:3], line[3:6], line[6:]], start=1)` within the inner `for` loop.
 
 ```js
-assert.match(code, /\[line\[:3\],\s*line\[3:6\],\s*line\[6:\]\]\s*,\s*start\s*=\s*1/);
+assert.match(code, /\[\s*line\s*\[\s*:3\s*\]\s*,\s*line\s*\[\s*3\s*:\s*6\s*\]\s*,\s*line\s*\[\s*6\s*:\s*\]\s*\]\s*,\s*start\s*=\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
index 65f53ad78cb..4fd9d1a0755 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
@@ -14,13 +14,13 @@ In the `try` block, attempt to find the index of the first occurrence of `0` in
 Use the index of the first occurrence of `0` in the current row using `contents.index(0)`.
 
 ```js
-assert.match(code, /contents\.index\(0\)/)
+assert.match(code, /contents\.index\(\s*0\s*\)/)
 ```
 
 You should have `col = contents.index(0)` within the `try` block.
 
 ```js
-assert.match(code, /col\s*=\s*contents\.index\(0\)/)
+assert.match(code, /col\s*=\s*contents\.index\(\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
index d056d6e06ee..f155b422817 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
@@ -16,7 +16,7 @@ You should check if the number(`num`) is not present in `self.board[row]`.
 You should have `num not in self.board[row]` within `valid_in_row`.
 
 ```js
-assert.match(code, /num\s+not\s+in\s+self\.board\[row\]/)
+assert.match(code, /num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
index 41bf9d08d9f..d49cc46a704 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
@@ -21,7 +21,7 @@ You should have `return num not in self.board[row]` within `valid_in_row`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_row");
 const {function_body} = valid;
-assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\[row\]/);
+assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
index 593a0692e44..c8be90bef25 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] != num` within `valid_in_col`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /self\.board\[row\]\[col\]\s*!=\s*num/);
+assert.match(function_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
index e8d5f785409..db56127e374 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
@@ -28,7 +28,7 @@ You should have `all(self.board[row][col] != num for row in range(9))` within `v
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /all\s*\(\s*self\.board\[row\]\[col\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
+assert.match(function_body, /all\s*\(\s*self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
index 54810629c2e..2f298312b00 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
@@ -21,7 +21,7 @@ You should assign the result of `(row // 3) * 3` to `row_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /row_start\s*=\s*\(row\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /row_start\s*=\s*\(\s*row\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
index 95c5d352e02..35dfc06a603 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
@@ -21,7 +21,7 @@ You should assign the result of `(col // 3) * 3` to `col_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /col_start\s*=\s*\(col\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /col_start\s*=\s*\(\s*col\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
index 873820e6238..61bdd5e0828 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
@@ -22,7 +22,7 @@ You should have `next_empty := self.find_empty_cell()` within the `solver` metho
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\)/);
+assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
index d90f13a8483..463e090356c 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
@@ -16,7 +16,7 @@ You should have `if (next_empty := self.find_empty_cell()) is None:` withing `so
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /if\s*\(next_empty\s*:=\s*self\.find_empty_cell\(\)\)\s*is\s*None:/)
+assert.match(function_body, /if\s*\(\s*next_empty\s*:=\s*self\.find_empty_cell\(\s*\)\s*\)\s*is\s*None:/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
index 36d3b6ea64a..cee7fbe42cb 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
@@ -7,7 +7,7 @@ dashedName: step-64
 
 # --description--
 
-If still there are empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive).
+If there are still empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive). Your loop should use the variable named `guess`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have `for guess in range(1,10):` within the `else` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "else");
-assert.match(block_body, /for\s+\w+\s+in\s+range\(1,\s*10\)/);
+assert.match(block_body, /for\s+\w+\s+in\s+range\(\s*1,\s*10\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
index 4ba6282024b..fe12f0a74db 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] = guess` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*guess/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*guess/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
index df739aaff26..b6632dd4d7f 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
@@ -17,7 +17,7 @@ You should have `self.solver()` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.solver\(\)/);
+assert.match(block_body, /self\.solver\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
index 0692c975f15..c19c03c1b34 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
@@ -19,7 +19,7 @@ You should have `if self.solver():` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /if\s+self\.solver\(\):/);
+assert.match(block_body, /if\s+self\.solver\(\s*\):/);
 ```
 
 You should have `return True` within `if self.solver():`.
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
index eb4079a4d3c..eb3d0afd04f 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
@@ -19,7 +19,7 @@ You should have `self.board[row][col] = 0` outside the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*0/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*0/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
index 02de02bbdb1..7306fc93f69 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
@@ -18,7 +18,7 @@ You should have `gameboard = Board(board)` within the `solve_sudoku` function.
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solve_sudoku");
-assert.match(function_body, /gameboard\s*=\s*Board\(board\)/);
+assert.match(function_body, /gameboard\s*=\s*Board\(\s*board\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
index 9fcbdd994ad..d9e649b00a6 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
@@ -22,7 +22,7 @@ With this, you are finished with building the sudoku solver!
 Call the `solve_sudoku` method with `puzzle` as input.
 
 ```js
-assert.match(code, /solve_sudoku\(puzzle\)/);
+assert.match(code, /solve_sudoku\(\s*puzzle\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
index e388b8bec8d..87850008b08 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
@@ -37,7 +37,7 @@ You should assign `array[:middle_point]` to the `left_part` variable.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /left_part\s*=\s*array\[:middle_point\]/);
+    assert.match(function_body, /left_part\s*=\s*array\s*\[\s*:\s*middle_point\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
index c7380d16d01..272cb6b6e10 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
@@ -22,7 +22,7 @@ You should replace `pass` keyword with an `if` statement with this condition: `l
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*pass/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
index cf4442213a4..22184412002 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
@@ -24,7 +24,7 @@ You should replace `pass` with `array[sorted_index] = left_part[left_array_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*array\[sorted_index\]\s*=\s*left_part\[left_array_index\]\s*(?!.*\bpass\b)/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]\s*(?!.*\bpass\b)/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
index 55f1bf9e500..56b5d917597 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
@@ -24,7 +24,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /else:\s*[^}]*array\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /else:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
index 17a196fad08..ac8080a53a4 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
@@ -24,7 +24,7 @@ Your `while` loop should have this condition: `left_array_index < len(left_part)
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(left_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):/m);
   }
 })
 ```
@@ -38,7 +38,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
index cc1e5bbc321..9ab16ae9abc 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = left_part[left_array_index]` in the body
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ You should not have `pass` in the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
index 1946e7eb716..4a963de5af1 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `left_array_i
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
index aae867e93fe..6b52cf78051 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
@@ -22,7 +22,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
index ea0a0fc25b4..c9b442e0917 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
@@ -22,7 +22,7 @@ Your `while` loop should have this condition: `right_array_index < len(right_par
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(right_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):/m);
   }
 })
 ```
@@ -36,7 +36,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
index 4dc0343f2fa..5230ec8ea95 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
index 9e4922b4e26..11e72c36c98 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
@@ -20,7 +20,7 @@ You should have `right_array_index += 1` within the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bright_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bright_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
index 4a82a0b65cd..7d7867f7029 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
index d5f023bc02b..c3e99d274f2 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
@@ -24,7 +24,7 @@ You should create an `if` statement to check if `len(array) <= 1`. Don't forget
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*pass/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
index ac69c67b554..899676342c3 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
@@ -20,7 +20,7 @@ You should replace `pass` with a `return` statement in the body of the `if` stat
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*return/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the body of the `if` statement
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
index dd86dbd19d4..e12bbd6e549 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
@@ -21,8 +21,8 @@ You should add `1` to the current value of `left_array_index`.
     const { function_body } = merge_sort;
 
     const allowedMatches = [
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
     ]
 
     const anyMatch = allowedMatches.some((match) => match.test(function_body));
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
index 431ccb6e893..e80df166dda 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
@@ -34,7 +34,7 @@ You should assign `array[middle_point:]` to the `right_part` variable
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /right_part\s*=\s*array\[middle_point:\]/);
+    assert.match(function_body, /right_part\s*=\s*array\s*\[\s*middle_point\s*:\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
index 0d7bac6b585..3f55f555b1a 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
@@ -7,11 +7,11 @@ dashedName: step-2
 
 # --description--
 
-Replace the `pass` statement with a variable named `card_number` and a value of `4111-1111-4555-1142`.
+Replace the `pass` statement with a variable named `card_number` and a value of `'4111-1111-4555-1142'`.
 
 # --hints--
 
-You should have `card_number = "4111-1111-4555-1142"` within the `main` function.
+You should have `card_number = '4111-1111-4555-1142'` within the `main` function.
 
 ```js
 ({
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
index 8c8b062cab9..7edd2cee6eb 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
@@ -13,7 +13,7 @@ The Luhn algorithm is as follows:
 
 1. From the right to left, double the value of every second digit; if the product is greater than 9, sum the digits of the products.
 2. Take the sum of all the digits.
-3. If the sum of all the digits is a multiple of `10`, then the number is valid; else it is not valid.
+3. If the sum of all the digits is a multiple of 10, then the number is valid; else it is not valid.
 
 Assume an example of an account number "7992739871" that will have a check digit added, making it of the form 7992739871x:
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
index 4f8e157bbca..468e8733119 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
@@ -30,7 +30,7 @@ You should have `card_number_reversed = card_number[0:4]` within the `verify_car
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
index f39d9cd6b23..b211b11dd51 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
@@ -20,7 +20,7 @@ You should have `odd_digits = card_number_reversed[::2]` within the `verify_card
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\[::2\]/);
+        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\s*\[\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
index ea35dacbf26..07e4df20951 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
@@ -27,7 +27,7 @@ You should have `sum_of_odd_digits += int(digit)` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(digit\)/);
+        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(\s*digit\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
index 506baf4692b..f70fee2f00c 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
@@ -20,7 +20,7 @@ You should have `even_digits = card_number_reversed[1::2]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\[1::2\]/);
+        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\s*\[\s*1\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
index b4906a5269a..c721c892786 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
@@ -22,7 +22,7 @@ You should have `number = int(digit) * 2` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /number\s*=\s*int\(digit\)\s*\*\s*2/);
+        assert.match(function_body, /number\s*=\s*int\(\s*digit\s*\)\s*\*\s*2/);
     }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
index bf2c85ca96a..0621ac3b744 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
@@ -30,8 +30,8 @@ You should have `number = number // 10 + number % 10` within the `if` statement.
         const verify_card_number = __helpers.python.getBlock("\n" + transformedCode, "if number >= 10");
         const { block_body } = verify_card_number;
         const allowedMatches = [
-            /number *= *\(?number *\/\/ *10\)? *\+ *\(?number *% *10/,
-            /number *= *\(?number *% *10\)? *\+ *\(?number *\/\/ *10/
+            /number *= *\(?\s*number *\/\/ *10\s*\)? *\+ *\(?\s*number *% *10/,
+            /number *= *\(?\s*number *% *10\s*\)? *\+ *\(?\s*number *\/\/ *10/
         ];
 
         const someMatch = allowedMatches.some(allowedMatch => allowedMatch.test(block_body));
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
index f3eac18bc56..b82291c6bb9 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
@@ -7,7 +7,7 @@ dashedName: step-33
 
 # --description--
 
-Adjust the `verify_card_number` call such that if it returns `True`, print `VALID!` to the console. Otherwise, print `INVALID!`.
+Adjust the `verify_card_number` call such that if it returns `True`, print `'VALID!'` to the console. Otherwise, print `'INVALID!'`.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `if verify_card_number(translated_card_number):` within the `mai
 })
 ```
 
-You should have `print("VALID!")` within the `if` statement.
+You should have `print('VALID!')` within the `if` statement.
 
 ```js
 ({
@@ -40,7 +40,7 @@ You should have `print("VALID!")` within the `if` statement.
 })
 ```
 
-You should have `print("INVALID!")` within the `else` clause.
+You should have `print('INVALID!')` within the `else` clause.
 
 ```js
 ({
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
index 74ab1bf5a36..5a437567441 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
@@ -7,7 +7,7 @@ dashedName: step-34
 
 # --description--
 
-Change the value of `card_number` such that `INVALID!` is printed to the console.
+Change the value of `card_number` such that `'INVALID!'` is printed to the console.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
index 53871454811..46ec799e1d1 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
@@ -20,7 +20,7 @@ You should have `card_number_reversed = card_number[0:4:2]` within the `verify_c
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4:2\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
index 6bc90ddc51c..d68c7870b4b 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
@@ -27,7 +27,7 @@ You should have `card_number_reversed = card_number[::-1]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[::-1\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*:\s*:\s*-1\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
index b9f7959cf09..605ff24ebe1 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
@@ -10,10 +10,10 @@ dashedName: step-4
 A dictionary is another built-in data type in Python. A dictionary is a collection of data in the form of *key*-*value* pairs. Dictionaries are defined with curly braces `{}` and they contain key-value pairs separated by commas. Each key is followed by a colon `:` and the value:
 
 ```py
-{"amount": 50.0, "category": "Food"}
+{'amount': 50.0, 'category': 'Food'}
 ```
 
-In the example above, `amount` and `category` are keys, and `50.0` and `Food` are their the corresponding values.
+In the example above, `amount` and `category` are keys, and `50.0` and `'Food'` are their the corresponding values.
 
 Create a dictionary with a key `amount` and value of the `amount` parameter and pass your new dictionary to the `.append()` call.
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
index 67bff31032c..82416e2ba01 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `category` as the key, and the `category` parameter as the value.
+Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `'category'` as the key, and the `category` parameter as the value.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
index dce36e6b1d1..5b89122f3f6 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
@@ -10,11 +10,11 @@ dashedName: step-9
 You can access values in a dictionary through its keys. You need to use the bracket notation and include the key between the square brackets:
 
 ```py
-my_dict = {"amount": 50.0, "category": "Food"}
-my_dict["amount"] # 50.0
+my_dict = {'amount': 50.0, 'category': 'Food'}
+my_dict['amount'] # 50.0
 ```
 
-You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `amount` key and the `category` key in the `expense` dictionary.
+You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `'amount'` key and the `'category'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
index 984d5d5bc68..1eb5766bc19 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
@@ -13,7 +13,7 @@ Lambda functions are brief, anonymous functions in Python, ideal for simple, one
 lambda x: expr
 ```
 
-In the example above, `x` is a parameter to be use in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
+In the example above, `x` is a parameter to be used in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
index 09589ff3c88..cb025732c4f 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `amount` key in the `expense` dictionary.
+Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `'amount'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
index c5b5624110f..10cadc8e664 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `category` key of the `expense` dictionary and `category`.
+Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `'category'` key of the `expense` dictionary and `category`.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
index 14f3c2dcf35..f035a492f72 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
@@ -23,7 +23,7 @@ You should define a function named `main()` without parameters.
 })
 ```
 
-You should move the `expense` list inside the `main()` function body.
+You should move the `expenses` list inside the `main()` function body.
 
 ```js
 ({ test: () => assert(__pyodide.runPython(`
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
index 21d1dc62280..6cad2bd7c6e 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
@@ -14,7 +14,7 @@ while condition:
     <code>
 ```
 
-Below the `expense` list, create a `while` loop. Use `True` for the condition, and print the string `\nExpense Tracker` inside the loop body to show the title of the program.
+Below the `expenses` list, create a `while` loop. Use `True` for the condition, and print the string `'\nExpense Tracker'` inside the loop body to show the title of the program.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
index 328385b3b02..7504bbffc66 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
@@ -9,7 +9,7 @@ dashedName: step-25
 
 The `while` loop you created in the previous step is an infinite loop that will allow the program to continuously present menu options until the user decides to exit.
 
-After the `print()` call, add another one to print the string `1. Add an expense`.
+After the `print()` call, add another one to print the string `'1. Add an expense'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
index c2798188b3d..e920d92ef0a 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
@@ -7,7 +7,7 @@ dashedName: step-26
 
 # --description--
 
-Next, add another `print()` call and pass the string `2. List all expenses`.
+Next, add another `print()` call and pass the string `'2. List all expenses'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
index 92f8bab0779..57f9e9bc96f 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
@@ -7,7 +7,7 @@ dashedName: step-27
 
 # --description--
 
-Provide the other menu options by printing the following three strings in your `while` loop: `3. Show total expenses`, `4. Filter expenses by category`, and `5. Exit`.
+Provide the other menu options by printing the following three strings in your `while` loop: `'3. Show total expenses'`, `'4. Filter expenses by category'`, and `'5. Exit'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
index 646335a3348..19f3273a3b8 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
@@ -9,7 +9,7 @@ dashedName: step-28
 
 The `input()` function takes a user input and it returns the user input in the form of a string.
 
-Inside your `while` loop, call the `input()` function passing the string `Enter your choice:` as the argument, and assign the result to a variable named `choice`.
+Inside your `while` loop, call the `input()` function passing the string `'Enter your choice: '` as the argument, and assign the result to a variable named `choice`.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
index 716f8583749..756969ea3db 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
@@ -7,9 +7,9 @@ dashedName: step-29
 
 # --description--
 
-You are going to use conditional statements to check the user's choice. If the choice is `1`, it means the user wants to add an expense.
+You are going to use conditional statements to check the user's choice. If the choice is `'1'`, it means the user wants to add an expense.
 
-Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `1`. If it's true, it will be the starting point for adding a new expense.
+Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `'1'`. If it's true, it will be the starting point for adding a new expense.
 
 Inside the `if` statement body, declare a variable `amount` and assign it an empty `input()` call.
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
index 57837acba2f..4cf5424f519 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
@@ -9,7 +9,7 @@ dashedName: step-30
 
 Inside the `if` statement, you should ask the user to enter the amount for the expense and store it in a variable.
 
-Pass the string `Enter amount:` to your empty `input()` call, so you can store the expense.
+Pass the string `'Enter amount: '` to your empty `input()` call, so you can store the expense.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
index 5b939fb0926..58aea54a019 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
@@ -9,7 +9,7 @@ dashedName: step-34
 
 To list all expenses, you can use an `elif` statement after an `if` statement. The `elif` checks additional conditions and only works following an `if` statement.
 
-Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `\nAll Expenses:`.
+Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `'\nAll Expenses:'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
index 277b6fc695c..972db9bec45 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
@@ -9,7 +9,7 @@ dashedName: step-36
 
 To show the total expenses, create an `elif` statement that checks if `choice == '3'`.
 
-If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `\nTotal Expenses:` as the first argument and `total_expenses(expenses)` as the second argument.
+If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `'\nTotal Expenses: '` as the first argument and `total_expenses(expenses)` as the second argument.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
index 21169e62054..abfbdb1eb2d 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
@@ -7,9 +7,9 @@ dashedName: step-41
 
 # --description--
 
-To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `5`.
+To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `'5'`.
 
-Inside the new `elif` statement, print the string `Exiting the program.` to show that the program is terminating its execution.
+Inside the new `elif` statement, print the string `'Exiting the program.'` to show that the program is terminating its execution.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `elif choice == '5':` in your code.
 })
 ```
 
-You should print `Exiting the program.` in your new `elif` statement.
+You should print `'Exiting the program.'` in your new `elif` statement.
 
 ```js
 ({ test: () =>
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
index 3237bab6876..cedc88c3b61 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
@@ -22,7 +22,7 @@ You should replace `pass` with an empty list named `snake_cased_char_list` withi
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\]/);
+        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\s*\]\s*/);
     }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
index 5952647a3fe..3c997eba37c 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
@@ -34,7 +34,7 @@ You should use the `.append()` method to add `char` to the `snake_cased_char_lis
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list.append\(char\)/);
+        assert.match(function_body, / +snake_cased_char_list.append\(\s*char\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
index f095072fcd2..0cb257b20ac 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
@@ -7,11 +7,11 @@ dashedName: step-12
 
 # --description--
 
-Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `aLongAndComplexString` as input to the function and print out the output using the `print()` function.
+Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `'aLongAndComplexString'` as input to the function and print out the output using the `print()` function.
 
 # --hints--
 
-You should call `convert_to_snake_case()` inside the `main()` function and pass `aLongAndComplexString` as input to the function.
+You should call `convert_to_snake_case()` inside the `main()` function and pass `'aLongAndComplexString'` as input to the function.
 
 ```js
 ({
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
index 4f17da91980..3e213f4876a 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
@@ -7,7 +7,7 @@ dashedName: step-22
 
 # --description--
 
-Finally try out this new implementation by executing the program. Change the input string to `IAmAPascalCasedString` and see if it comes out as `i_am_a_pascal_cased_string`, even though that's a lie.
+Finally try out this new implementation by executing the program. Change the input string to `'IAmAPascalCasedString'` and see if it comes out as `'i_am_a_pascal_cased_string'`, even though that's a lie.
 
 If you've done everything correctly, you should see the input string converted into snake case, like before.
 
@@ -15,7 +15,7 @@ Congratulations! Now your `convert_to_snake_case()` function is ready.
 
 # --hints--
 
-You should change the input string from `aLongAndComplexString` to `IAmAPascalCasedString` inside the `main()` function.
+You should change the input string from `'aLongAndComplexString'` to `'IAmAPascalCasedString'` inside the `main()` function.
 
 ```js
 ({
@@ -24,7 +24,7 @@ You should change the input string from `aLongAndComplexString` to `IAmAPascalCa
         const main = __helpers.python.getDef("\n" + transformedCode, "main");
         const { function_body } = main;
 
-        assert.match(function_body, / +print\(convert_to_snake_case\('IAmAPascalCasedString'\)\)/);
+        assert.match(function_body, / +print\(\s*convert_to_snake_case\(\s*'IAmAPascalCasedString'\s*\)\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
index 80bf513393d..7635229b2a5 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
@@ -7,9 +7,9 @@ dashedName: step-3
 
 # --description--
 
-The puzzle starts with the disks piled up on the first rod, in decreasing size. You need to populate your first list with numbers representing the various disk sizes.
+The puzzle starts with the disks piled up on the first rod, in decreasing size, with the smallest disk on top and the largest disk on the bottom. You need to populate your first list with numbers representing the various disk sizes.
 
-Instead of adding the items manually to the first list, generate a sequence of numbers from `3` to `1` by using the `range()` function and assign it to `rods['A']`.
+Instead of adding the items manually to the first list, generate a sequence of numbers counting down from `3` to `1` by using the `range()` function and assign it to `rods['A']`. Here, `3` represents the largest disk at the bottom of the pile and `1` represents the smallest disk at the top of the pile.
 
 The syntax is `range(x, y, h)`, where `x` is the starting integer (inclusive), `y` is the last integer (not inclusive), and `h` is the difference between a number and the next one in the sequence.
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
index 7ea705c6b3c..a3b79bffa22 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
@@ -14,13 +14,13 @@ Now check the data type of your `'A'` key by passing it to the `type()` function
 You should pass your `'A'` key to the `type()` function.
 
 ```js
-({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)/) })
+({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)/) })
 ```
 
 You should print the type of `rods['A']` using the `print()` function.
 
 ```js
-({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)\s*\)/) })
+({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
index f3b9a1408bd..1b6c19071e3 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
@@ -14,7 +14,7 @@ Now that the type is `list` as required, you can remove the `print()` call.
 You should remove `print(type(rods['A']))` from your code.
 
 ```js
-({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
+({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
index e9ecf2d75b9..1ac38cccdd1 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
@@ -9,7 +9,7 @@ dashedName: step-16
 
 At the end of this project, you will create a recursive solution to the Tower of Hanoi puzzle, but now you are going to explore an iterative approach to this problem.
 
-Start by adding a `for` loop to your function that iterates through the number of moves and prints the current iteration number.
+Start by adding a `for` loop to your function that iterates through the `number_of_moves` and prints the current iteration number.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
index f12a4108bfb..19cb803421c 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `A` and `B` (the source and the auxiliary rods).
+When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `'A'` and `'B'` (the source and the auxiliary rods).
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
index eae7a9102e6..6691dbd9b39 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
@@ -7,7 +7,7 @@ dashedName: step-21
 
 # --description--
 
-Finally, when the move number divided by 3 has no remainder, the movement is allowed between `B` and `C`.
+Finally, when the move number divided by 3 has no remainder, the movement is allowed between `'B'` and `'C'`.
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
index 0890b918198..d1a29dc55ad 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
@@ -18,10 +18,10 @@ You should have an `elif` statement to check if `rods[source]` is not empty and
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:`);
 assert.match(code, re);
 ```
 
@@ -30,10 +30,10 @@ You should set `forward` to `True` inside your new `elif` statement. You should
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
 assert.match(code, re);
 ```
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
index 38e47797b0e..e7cccfd9b12 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
@@ -20,7 +20,7 @@ You should add an `if` statement to execute when `forward` is `True` after the `
 You should print the provide string inside your new `if` statement.
 
 ```js
-({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
+({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
index d17004245a4..90c49dffeae 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
@@ -14,13 +14,13 @@ After printing the move, you need to remove the last element from the source rod
 You should remove the last element from `rods[source]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[target].append(rods[source].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
index b2502e50398..1f89ba96225 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
@@ -14,25 +14,25 @@ When `forward` is `False`, the disk has to be moved in the opposite direction. W
 You should have an `else` clause to move the disks in the opposite direction.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
 ```
 
 You should have `print(f'Moving disk {rods[target][-1]} from {target} to {source}')` inside your `else` clause.
 
 ```js
-({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
+({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
 ```
 
 You should remove the last element from `rods[target]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[source].append(rods[target].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
index 7d485f0120d..84132b183a2 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
@@ -14,13 +14,13 @@ Outside the `else` block, add a comment saying `display our progress` and print
 You should use the provided text to add a comment outside the `else` block.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
 ```
 
 You should print the `rods` object outside the `else` block, after the comment.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
index de4fde4a3eb..2088e620cf7 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
@@ -15,7 +15,7 @@ You should move the code nested inside the first `if` statement (except the firs
 
 ```js
 ({ test: () => {
-  assert.match(code, /def\s+make_allowed_move\(rod1, rod2\):\s+forward\s+=\s+False\s+if\s+not\s+rods\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\[\s*source\s*\]\s+and\s+rods\[\s*source\s*\]\[-1\]\s<\srods\[\s*target\s*\]\[\s*-\s*1\s*\]:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\[\s*source\s*\].append\(\s*rods\[\s*target\s*\].pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+\print\(\s*rods\s*\)/);
+  assert.match(code, /def\s+make_allowed_move\(\s*rod1, rod2\s*\):\s+forward\s+=\s+False\s+if\s+not\s+rods\s*\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\s*\[\s*source\s*\]\s+and\s+rods\s*\[\s*source\s*\]\s*\[\s*-1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\s*\[\s*source\s*\]\s*\.append\(\s*rods\s*\[\s*target\s*\]\s*\.pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\(\s*rods\s*\)/);
   }
 })
 ```
@@ -47,7 +47,7 @@ def move(n, source, auxiliary, target):
             if not rods[target]:
                 forward = True
             elif rods[source] and rods[source][-1] < rods[target][-1]:
-                forward = True              
+                forward = True
             if forward:
                 print(f'Moving disk {rods[source][-1]} from {source} to {target}')
                 rods[target].append(rods[source].pop())
@@ -57,7 +57,7 @@ def move(n, source, auxiliary, target):
 
             # display our progress
             print(rods)
---fcc-editable-region--            
+--fcc-editable-region--
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
         elif remainder == 0:
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
index f3a3291a455..9e92510ffb3 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
@@ -15,11 +15,11 @@ You should change each occurrence of `source` inside the `make_allowed_move()` f
 
 ```js
 ({ test: () => {
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
index 956049d3989..458f095d233 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
@@ -16,11 +16,11 @@ You should change each occurrence of `target` inside `make_allowed_move` into `r
 ```js
 ({ test: () => {
   assert.match(code, /if\s+not\s+rods\s*\[\s*rod2\s*\]\s*:/);
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\[\s*rod2\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*rod2\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\s*\[\s*rod2\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod2\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
index 34a46e17ee0..ff2e2f9e724 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
@@ -11,7 +11,7 @@ It looks like it's working! But the output is not very readable. Print a new lin
 
 # --hints--
 
-You should pass a string with a new line character (`\n`) as the second argument for your two `print(rods)` calls.
+You should pass a string with a new line character (`'\n'`) as the second argument for your two `print(rods)` calls.
 
 ```js
 ({ test: () => assert.match(code, /print\(\s*rods\s*,\s*('|")\\n\1\s*\)(?=.*print\(\s*rods\s*,\s*('|")\\n\2\s*\))/s) })
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
index 16430f9cae4..63a8921e8e8 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
@@ -16,7 +16,7 @@ For now, each recursive call prints the `rods` dictionary without performing any
 You should remove the last element from the `rods[source]` list and append it to the `rods[target]` list before the `print` call.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
index 4a1e00ed635..0493123b733 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
@@ -14,7 +14,7 @@ Before appending the last element to the target, add a comment saying `move the
 You should add a comment with the provided text before `rods[target].append(rods[source].pop())`.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\))/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
index f2fd9821b4e..ab77b66cae1 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Although recursion could sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
+Although recursion can sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
 
 Set `NUMBER_OF_DISKS` to `5` and check the output.
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
index cb4bf104cd2..83ba19a907a 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
@@ -21,7 +21,7 @@ You should delete the last three lines in your code.
 ({ test: () => {
   assert.isFalse(/pattern\s*=\s*r("|')\\W\1/.test(code));
   assert.isFalse(/quote\s*=\s*("|')_\1/.test(code));
-  assert.isFalse(/print\(re\.findall\(pattern, quote\)\)/.test(code));
+  assert.isFalse(/print\(\s*re\.findall\(\s*pattern, quote\s*\)\s*\)/.test(code));
 }})
 ```
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
index 47feb9ae34c..d62b3f42b91 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
@@ -14,7 +14,7 @@ Now, turn the empty string in the constraint tuple into a regex pattern to match
 You should have the `(nums, '[0123456789]')` tuple in your `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
+({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
index 861e7a8608a..079e58ddbf6 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
@@ -27,7 +27,7 @@ You should replace your existing `for` loop and two `if` statements with a singl
 Your new `if` condition should be a list comprehension that is the result of evaluating the expression `constraint <= len(re.findall(pattern, password))` for each `constraint`-`pattern` tuple in the `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /^(\s{8})if\s+\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
+({ test: () => assert.match(code, /^(\s{8})if\s*\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
index 5a7a8e606dd..06ef74d37dd 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
@@ -1,6 +1,6 @@
 ---
 id: 6551ecf597038c36637f3759
-title: Step 1
+title: 1° passo
 challengeType: 20
 dashedName: step-1
 ---
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
index 2e6d119b78b..5fa7e5c131a 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
@@ -1,6 +1,6 @@
 ---
 id: 6551eebe6cbb2e6cadf9b468
-title: Step 2
+title: Passo 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -15,7 +15,7 @@ string_2 = 'I am also a string'
 string_3 = 'This is not valid"
 ```
 
-Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `Hello World` to this variable.
+Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `'Hello World'` to this variable.
 
 # --hints--
 
@@ -32,7 +32,7 @@ You should declare a variable called `text`. Pay attention to place the variable
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello World` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
+You should assign the string `'Hello World'` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello World\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
index d40877ed6af..2b65b4b4212 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
@@ -14,7 +14,7 @@ greet = 'Hello!'
 print(greet)
 ```
 
-The code in the example above would print the string `Hello!`, which is the value of the variable `greet` passed to `print()` as the argument.
+The code in the example above would print the string `'Hello!'`, which is the value of the variable `greet` passed to `print()` as the argument.
 
 Print your `text` variable to the screen by passing the `text` variable as the argument to the `print()` function.
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
index 86104aff4f6..7c28d74b6b7 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `Hello World`, `H` is at index `0`, `e` is at index `1`, and so on. 
+Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `'Hello World'`, `'H'` is at index `0`, `'e'` is at index `1`, and so on.
 
 Each character of a string can be accessed by using bracket notation. You need to write the variable name followed by square brackets and add the index of the character between the brackets:
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
index 5d0ae1dd2fa..3103cb653bf 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-You can see `11` printed on the terminal because `Hello World` contains 11 characters.
+You can see `11` printed on the terminal because `'Hello World'` contains 11 characters.
 
 Another useful built-in function is `type()`, which returns the data type of a variable. Modify your `print()` call to print the data type of `text`.
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
index cedb112a823..074c15b2e19 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
@@ -14,7 +14,7 @@ Key aspects of variable naming in Python are:
 - Variable names are case sensitive, i.e. `my_var` is different from `my_Var` and `MY_VAR`.
 - Finally, it is a common convention to write variable names using `snake_case`, where each space is replaced by an underscore character and the words are written in lowercase letters.
 
-Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `abcdefghijklmnopqrstuvwxyz` to this variable.
+Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `'abcdefghijklmnopqrstuvwxyz'` to this variable.
 
 # --hints--
 
@@ -38,7 +38,7 @@ You should declare a variable called `alphabet`. Pay attention to place the vari
 assert.match(code, /^alphabet\s*=/m)
 ```
 
-You should assign the string `abcdefghijklmnopqrstuvwxyz` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
+You should assign the string `'abcdefghijklmnopqrstuvwxyz'` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
 
 ```js
 assert.match(code, /^alphabet\s*=\s*("|')abcdefghijklmnopqrstuvwxyz\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
index abe8ced263d..5c272b6d6f1 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
@@ -15,7 +15,7 @@ Start by finding the position of the first letter in the string. One way is to c
 text.find('W')
 ```
 
-Above, uppercase `W` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `W` character inside the string stored in the `text` variable.
+Above, uppercase `'W'` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `'W'` character inside the string stored in the `text` variable.
 
 At the end of your code, call `.find()` on your `alphabet` string and pass `text[0]` to the method. Note that a method is just a function that belongs to an object (you will learn more about that in another project).
 
@@ -36,7 +36,7 @@ assert.match(code, /alphabet\.find\s*\(.*\)/)
 You should call the `.find()` method on the `alphabet` variable and pass `text[0]` to the method. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)/m)
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 412619ccc4c..3e3af82109c 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -22,7 +22,7 @@ assert.match(code, /^index\s*=/m)
 You should assign the value returned by `alphabet.find(text[0])` to your `index` variable.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 34166fe3da4..83feddb9318 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `H`, is not found, since `alphabet` contains only lowercase letters.
+`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `'H'`, is not found, since `alphabet` contains only lowercase letters.
 
 You can transform a string into its lowercase equivalent with the `.lower()` method. Add another `print()` call to print `text.lower()` and see the output.
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index 54d47cf3f49..9a554ddeef1 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -27,7 +27,7 @@ assert.match(code, /^print\s*\(\s*index\s*\)/m);
 You should update your `alphabet.find(text[0])` call to use `text[0].lower()` as the argument. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index 95e2567fa84..e4c0036ebff 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-As you can see from the output, `h` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
+As you can see from the output, `'h'` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
 
 Modify your `shifted` variable so that it stores the value of `alphabet` at index `index + shift`.
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index 41811515713..a8da79ffd22 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -35,14 +35,14 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i/m)
 ```
 
-You should write the `in` keyword after `for i `. Make sure to leave a space around the `in` keyword.
+You should write the `in` keyword after `for i`. Make sure to leave a space around the `in` keyword.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i\s+in\s+/m)
 ```
 
-You should write `text` after `for i in `. Don't forget to add the final `:`.
+You should write `text` after `for i in`. Don't forget to add the final `:`.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index b7051de41c3..bdf47ed7c6f 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -7,7 +7,7 @@ dashedName: step-42
 
 # --description--
 
-Currently, spaces get encrypted as `c`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
+Currently, spaces get encrypted as `'c'`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
 
 ```py
 if x != 0:
@@ -16,7 +16,7 @@ if x != 0:
 
 In the example above, the condition of the `if` statement is `x != 0`. The code `print(x)`, inside the `if` statement body, runs only when the condition evaluates to `True` (in this example, meaning that `x` is different from zero).
 
-At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `space!`. Remember to indent this line.
+At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `'space!'`. Remember to indent this line.
 
 # --hints--
 
@@ -36,7 +36,7 @@ const {block_body} = __helpers.python.getBlock(commentless_code, /for\s+char\s+i
 assert(block_body.match(/if\s+char\s*==\s*("|')\s\1\s*:/));
 ```
 
-You should print the string `space!` inside your new `if` statement.
+You should print the string `'space!'` inside your new `if` statement.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index 69191130521..f3fc108e506 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, instead of printing `space!`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
+Now, instead of printing `'space!'`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index dfc91239b0e..f6ea23b4325 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Try to assign the string `Hello Zaira` to your `text` variable and see what happens in the console.
+Try to assign the string `'Hello Zaira'` to your `text` variable and see what happens in the console.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have a `text` variable.
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello Zaira` to your `text` variable.
+You should assign the string `'Hello Zaira'` to your `text` variable.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello\sZaira\1/m)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index 5629c8d00fb..b5f4088d3b7 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -7,7 +7,7 @@ dashedName: step-58
 
 # --description--
 
-Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `python` to this variable.
+Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `'python'` to this variable.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should declare a variable called `custom_key`.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should assign the string `python` to your `custom_key` variable.
+You should assign the string `'python'` to your `custom_key` variable.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "python") })
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 179f7313a5d..47211f5e8bc 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -7,8 +7,7 @@ dashedName: step-59
 
 # --description--
 
-Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text.
-At the beginning of your function body, declare a `key_index` variable and set it to zero.
+Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text. At the beginning of your function body, declare a `key_index` variable and set it to zero.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 660fb4ab263..7e452e05438 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
 
     for char in message.lower():
 --fcc-editable-region--
-        
+
         if char == ' ':
             encrypted_text += char
 --fcc-editable-region--            
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7727f6c57a8..7ca155b0c73 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -7,8 +7,7 @@ dashedName: step-62
 
 # --description--
 
-You will need to increase the `key_index` count for the next iteration.
-To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
+You will need to increase the `key_index` count for the next iteration. To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index 67567e88cdf..a6cd4a9a348 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
         if char == ' ':
             encrypted_text += char
         else:
-            
+
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index da202c1490a..7ca3ec197c0 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -50,7 +50,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key):
             # Find the right key character to encode
             key_char = key[key_index % len(key)]
             key_index += 1
-            
+
 --fcc-editable-region--            
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index 7ca7c2f323a..f783cbf3472 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -32,7 +32,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -41,7 +41,7 @@ def vigenere(message, key):
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
-            
+
             offset = alphabet.index(key_char)
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index a371865b1ef..28c793c06c3 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -55,7 +55,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index 60289b5525e..acf5b0f71c8 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -43,7 +43,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -57,7 +57,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index b1f7c3a5caa..87f8a5aa7f3 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -31,7 +31,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 534ff69ec91..84f3a8477e1 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -46,7 +46,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -60,9 +60,9 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 --fcc-editable-region--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index 3dfdd998a92..d29b009f3cf 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -47,9 +47,9 @@ def vigenere(message, key, direction):
             new_index = (index + offset) % len(alphabet)
 --fcc-editable-region--
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 #encryption = vigenere(text, custom_key)
 #print(encryption)
 ```
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 330871bc52a..9f1ea94390c 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,9 +45,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 --fcc-editable-region--
 #encryption = vigenere(text, custom_key)
 #print(encryption)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index db2c5bdfe33..adf869e6b5f 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index b4b329858a2..8e744b4c09f 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index f49b76f417f..cd7e9ce3a58 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -39,7 +39,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -53,7 +53,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index b295655e5c6..a6ecf2194d0 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -38,7 +38,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -52,9 +52,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index 521f1f961d3..d77bcd5d985 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -19,7 +19,7 @@ You should have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should be equal to the string `Hello Zaira!`.
+Your `text` variable should be equal to the string `'Hello Zaira!'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "Hello Zaira!") })
@@ -40,7 +40,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -54,9 +54,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index f9dfeed2c7d..a60afdc14cc 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -53,9 +53,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index fa8531f3421..40bfdb53982 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -48,9 +48,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index aba2d5665d2..822b22f2743 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -46,9 +46,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index a8a4a146373..82df5c7e409 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -70,7 +70,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index 900a42440bf..ceda0450cc8 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -51,7 +51,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index b37f689c14a..c0d946a1d38 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index d863b1b5667..e86470c6c34 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -51,15 +51,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index e7e001fd7b2..cb2c9d5e191 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -9,7 +9,7 @@ dashedName: step-86
 
 It works! Now, you are going to start with an encrypted message to be decrypted.
 
-Change the value of `text` to the string `mrttaqrhknsw ih puggrur`.
+Change the value of `text` to the string `'mrttaqrhknsw ih puggrur'`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should still have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should have the value of `mrttaqrhknsw ih puggrur`.
+Your `text` variable should have the value of `'mrttaqrhknsw ih puggrur'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "mrttaqrhknsw ih puggrur") })
@@ -54,15 +54,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = encrypt(text, custom_key)
 print(encryption)
 decryption = decrypt(encryption, custom_key)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index 7295239a2e5..a2e43552133 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -46,7 +46,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -60,9 +60,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 582c138e1b3..3cfffa05b63 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index 43650a129a7..b809b6cc227 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -9,11 +9,11 @@ dashedName: step-88
 
 Two or more strings can be concatenated by using the `+` operator. For example: `'Hello' + ' there!'` results in `'Hello there!`.
 
-Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `Encrypted text: `. Pay attention to the spacing.
+Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `'Encrypted text: '`. Pay attention to the spacing.
 
 # --hints--
 
-You should call `print()` and pass `'Encrypted text: ' + text` as the arguments. 
+You should call `print()` and pass `'Encrypted text: ' + text` as the arguments.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--    
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index 68b96128144..bb3bf128cf9 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -7,11 +7,11 @@ dashedName: step-89
 
 # --description--
 
-Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 # --hints--
 
-You should have a `print()` call that prints `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+You should have a `print()` call that prints `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -52,12 +52,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index e52496dd150..6d5c9a3c856 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -7,7 +7,7 @@ dashedName: step-90
 
 # --description--
 
-In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings. 
+In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings.
 
 Interpolation means writing placeholders that will be replaced by the specified values when the program runs. For example, you can get the same result of `'Encrypted text: ' + text` with `f'Encrypted text: {text}'`. You need to put an `f` before the quotes to create the f-string and write the variables or expressions you want to interpolate between curly braces.
 
@@ -49,12 +49,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index ebdb8b79456..4e28d4737fc 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index 8e107b0fff4..d55577ba1cf 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -47,12 +47,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 0f916bf649e..073dfdcd2bb 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -50,12 +50,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 23af806c5ce..006a04850ea 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -7,7 +7,7 @@ dashedName: step-95
 
 # --description--
 
-Wait a minute! You cannot decrypt anything with the wrong key. Try with `happycoding`.
+Wait a minute! You cannot decrypt anything with the wrong key. Try with `'happycoding'`.
 
 With that, your cipher project is complete.
 
@@ -19,7 +19,7 @@ You should still have a `custom_key` variable.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should modify the `custom_key` value into `happycoding`.
+You should modify the `custom_key` value into `'happycoding'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "happycoding") })
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
@@ -96,12 +96,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 05c44517e6f..9a4c27f1945 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -7,8 +7,7 @@ dashedName: step-41
 
 # --description--
 
-Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare.
-They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
+Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare. They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
 
 Python has the following comparison operators:
 
@@ -47,11 +46,11 @@ Python has the following comparison operators:
   </tbody>
 </table>
 
-At the beginning of your loop body, print the result of comparing `char` with an empty space (`' '`). Use the equality operator `==` for that.
+At the beginning of your loop body, print the result of comparing `char` with a space (`' '`). Use the equality operator `==` for that.
 
 # --hints--
 
-You should compare `char` with an empty space using the equality operator inside your `for` loop.
+You should compare `char` with a space using the equality operator inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -62,7 +61,7 @@ You should compare `char` with an empty space using the equality operator inside
 })
 ```
 
-You should print the result of comparing `char` with an empty space inside your `for` loop.
+You should print the result of comparing `char` with a space inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -73,7 +72,7 @@ You should print the result of comparing `char` with an empty space inside your
 })
 ```
 
-You should print the result of comparing `char` with an empty space at the beginning of your loop.
+You should print the result of comparing `char` with a space at the beginning of your loop.
 
 ```js
 ({ test: () => {
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 34e53a7cc4f..86a5a8baa9a 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -18,7 +18,7 @@ Give your `for` loop a body by adding a call to `print(i)`. Remember to indent t
 
 # --hints--
 
-You should add `print(i)` to your `for` loop body. Pay attention to the indentation. 
+You should add `print(i)` to your `for` loop body. Pay attention to the indentation.
 
 ```js
 assert.match(code, /^for\s+i\s+in\s+text:\s+print\s*\(\s*i\s*\)/m)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index e7886b5f796..042349ee0a4 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -15,7 +15,7 @@ Restore the indentation for your `print(i)` call.
 
 # --hints--
 
-You should indent `print(i)` inside your `for` loop body. 
+You should indent `print(i)` inside your `for` loop body.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index 6215b77a724..f971dfe2276 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -13,7 +13,7 @@ Rename your `i` variable to `char`.
 
 # --hints--
 
-You should replace `i` with `char`. 
+You should replace `i` with `char`.
 
 ```js
 assert.match(code, /^for\s+char\s+in\s+text:\s+print\s*\(\s*char\s*\)/m)
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index b2203350e08..97fee73da43 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -7,7 +7,7 @@ dashedName: step-31
 
 # --description--
 
-Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `train`, but this is not valid:
+Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `'train'`, but this is not valid:
 
 ```py
 my_string = 'brain'
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index 39784236282..e2b04ef618e 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -14,7 +14,7 @@ message = 'Hello World'
 message = 'Hello there!'
 ```
 
-Delete the `text[0]` line and reassign `text` the string `Albatross`.
+Delete the `text[0]` line and reassign `text` the string `'Albatross'`.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*\[\s*0\s*\]\s*\=\s*("|')\w\1/.test(commentless_code));
 ```
 
-You should reassign `text` the string `Albatross`. Do not modify `text = 'Hello World'`.
+You should reassign `text` the string `'Albatross'`. Do not modify `text = 'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 076a71f8786..6b04513e34d 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -20,7 +20,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*=\s*("|')Albatross\1/.test(commentless_code))
 ```
 
-You should still have a `text` variable with the value `Hello World`.
+You should still have a `text` variable with the value `'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index 442d9c6cb33..a98c25c7099 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index 71e999219ba..d239d653b25 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
index 77f00424f1f..cd02c3e96d7 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
@@ -16,13 +16,13 @@ Delete `pass` and recursively call the `_insert` method on the left child of the
 You should call the `self._insert` method passing `node.left` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the `left` attribute of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
index f02ace3e3c2..2268da0e1ff 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
@@ -14,13 +14,13 @@ Inside your `elif` clause, replace `pass` with a call to the `_insert` method on
 You should call the `self._insert()` method passing `node.right` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the right attribute (`node.right`) of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
index 43a12dc037e..c0bd2ae39ec 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
@@ -25,7 +25,7 @@ You should call the `_search` method within the `search` method.
 You should call the `_search` method passing `self.root` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
index ae66ee1f7d6..206210ee8ab 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
@@ -14,7 +14,7 @@ Now, make the `search` method return the result of the `_search()` call.
 You should prepend the `return` statement to your `_search()` call.
 
 ```js
-({ test: () => assert.match(code, /return\s+self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /return\s+self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
index 4767e704545..6b16fc7c844 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
@@ -7,23 +7,23 @@ dashedName: step-24
 
 # --description--
 
-Write another `if` statement that checks if the target key is less than the key of the current node.
+Escreva outra declaração `if` que verifique se a chave de destino é menor que a chave do nó atual.
 
-Inside the `if` block, return the result of calling the `_search` method with the left child of the current node and `key` as the arguments.
+Dentro do bloco `if`, retorne o resultado da chamada do método `_search` com o filho à esquerda do nó atual e `key` como argumentos.
 
 # --hints--
 
-You should write another `if` statement to check if `key` < `node.key`.
+Você deve escrever outra instrução `if` para verificar se `key` < `node.key`.
 
 ```js
 const after_split = code.split('def search(self, key):')[1];
 assert.match(after_split, /if\s+key\s+<\s+node\.key/);
 ```
 
-You should return `self._search(node.left, key)` from your new `if` block.
+Você deve retornar `self._search(node.left, key)` do novo bloco `if`.
 
-```js    
-({ test: () => assert.match(code, /return\s+self\._search\(node\.left,\s*key\)/) });    
+```js
+({ test: () => assert.match(code, /return\s+self\._search\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
index bada16b34d8..eb1f21abc2d 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
@@ -25,14 +25,14 @@ assert.match(after_split, /self\._search/);
 You should pass two arguments to the call of the `_search` method: `node.right` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should return the result of the `_search` method call.
 
 ```js
 ({
-  test: () => assert.match(code, /return\s+self\._search\(node\.right,\s*key\)/)
+  test: () => assert.match(code, /return\s+self\._search\(\s*node\.right,\s*key\s*\)/)
 });
 ```
 
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
index 3f01f3032dc..cd4e0b28039 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
@@ -18,7 +18,7 @@ Within the `BinarySearchTree` class, define a `delete` method. It takes two para
 You should define a `delete` method with two parameters: `self` and `key`. Remember to use `pass`.
 
 ```js
-({ test: () => assert.match(code, /def\s+delete\(self,\s*key\)/) });
+({ test: () => assert.match(code, /def\s+delete\(\s*self,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
index 537a9395d90..36bc91fc647 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
@@ -14,7 +14,7 @@ Inside the `delete` method, delete `pass` and call the private helper method `_d
 Your `delete` method should call the `_delete` method with two arguments: `self.root` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
index f9c3222c504..1634a99a2f7 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
@@ -16,7 +16,7 @@ To handle this case, assign the result of the `_delete` call to `self.root`.
 You should assign the result of the `_delete()` call to `self.root`.
 
 ```js
-({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
index c2e63489267..6d335b8fdb9 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
@@ -14,7 +14,7 @@ Inside the `BinarySearchTree` class, define a new helper method called `_delete`
 You should define the `_delete` method inside the `BinarySearchTree` class with the parameters `self`, `node` and `key`. Remember to use the `pass` keyword.
 
 ```js
-assert.match(code, /def\s+_delete\(self,\s*node,\s*key\)/);
+assert.match(code, /def\s+_delete\(\s*self,\s*node,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
index 5bff2ac3703..6cff93432c8 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
@@ -14,13 +14,13 @@ Within the `if` block, replace `pass` with a call to the `_delete` method, passi
 You should call the `_delete` method with `node.left` and the `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to the left child (`node.left`) of the current node.
 
 ```js
-assert.match(code, /node\.left\s*=\s*self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /node\.left\s*=\s*self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
index 5800e1188c5..86141a13fcf 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
@@ -23,13 +23,13 @@ assert.match(after_split, /elif\s+key\s+>\s+node\.key/);
 You should call the `_delete` method with `node.right` and `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to `node.right`.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
index 61a28aab2b5..9264f543477 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
@@ -20,7 +20,7 @@ For now, add a `_min_value` call after your `elif` block, passing `node.right` a
 You should assign `self._min_value(node.right)` to `node.key` after your `elif` block.
 
 ```js
-assert.match(code, /node\.key\s*=\s*self\._min_value\(node\.right\)/);
+assert.match(code, /node\.key\s*=\s*self\._min_value\(\s*node\.right\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
index fabeac6f3a7..f86043b7131 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
@@ -22,7 +22,7 @@ assert.match(code, /self\._delete\(\s*node\.right\s*,\s*node\.key\s*/);
 You should assign the return value of the `_delete()` call to the right child of the current node.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right\,\s*node\.key/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right\,\s*node\.key/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
index fd23b7dae18..e41583404da 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
@@ -16,7 +16,7 @@ This will start the traversal from the root of the binary search tree (`self.roo
 You should call `_inorder_traversal` and pass `self.root` and `result` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._inorder_traversal\(self\.root,\s*result\)/) })
+({ test: () => assert.match(code, /self\._inorder_traversal\(\s*self\.root,\s*result\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
index a57c55f2626..87c9a7e85a9 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
@@ -14,7 +14,7 @@ Define the `_inorder_traversal` method and give it three parameters: `self`, `no
 You should define a method `_inorder_traversal` that takes three parameters: `self`, `node`, and `result`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+_inorder_traversal\(self,\s*node,\s*result\)/);
+assert.match(code, /def\s+_inorder_traversal\(\s*self,\s*node,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
index a0f99de4003..1e981d07e9d 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
@@ -20,7 +20,7 @@ assert.match(code, /if\s+node:/);
 You should call `_inorder_traversal` on the `node.left` inside the `if` block.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.left\s*,\s*result\s*\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.left\s*,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
index 8da71e66d0d..db081d5a29e 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
@@ -14,7 +14,7 @@ Still inside the `if` block, append the `key` of the current node to the `result
 You should append `node.key` to the `result` list.
 
 ```js
-assert.match(code, /result\.append\(node\.key\)/);
+assert.match(code, /result\.append\(\s*node\.key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
index fceb0c80a0a..f6ce20743f9 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
@@ -16,13 +16,13 @@ Create an instance of the `BinarySearchTree` class and assign it to the variable
 You should create an instance of the `BinarySearchTree` class.
 
 ```js
-assert.match(code, /BinarySearchTree\(\)/);
+assert.match(code, /BinarySearchTree\(\s*\)/);
 ```
 
 You should assign the new instance of `BinarySearchTree` to the variable `bst`.
 
 ```js
-assert.match(code, /bst\s*=\s*BinarySearchTree\(\)/);
+assert.match(code, /bst\s*=\s*BinarySearchTree\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
index ef0f4b3f950..0374edcdf1e 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
@@ -20,7 +20,7 @@ assert.match(code, /nodes/);
 Your `node` variable should have the value `[50, 30, 20, 40, 70, 60, 80]`.
 
 ```js
-assert.match(code, /nodes\s*=\s*\[50,\s*30,\s*20,\s*40,\s*70,\s*60,\s*80\]/);
+assert.match(code, /nodes\s*=\s*\[\s*50\s*,\s*30\s*,\s*20\s*,\s*40\s*\s*,\s*70\s*,\s*60\s*,\s*80\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
index 9ecb6145832..f294ab88650 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
@@ -16,7 +16,7 @@ This recursive call explores the entire right subtree in an in-order manner.
 You should call `_inorder_traversal` passing `node.right` and `result` as the arguments.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.right,\s*result\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.right,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
index efd05fb5231..d881644c81b 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
@@ -16,7 +16,7 @@ To change that to print a useful value, define another method named `__str__` in
 You should define a method `__str__` that takes a single argument `self`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+__str__\(self\)/);
+assert.match(code, /def\s+__str__\(\s*self\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
index 45d39298db1..b113f28ad10 100644
--- a/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
+++ b/curriculum/challenges/portuguese/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
@@ -14,7 +14,7 @@ In the body of the `__str__` method, delete `pass` and return the result of call
 You should return the string value of `self.key` from your `__str__` method.
 
 ```js
-({ test: () => assert.match(code, /^\s{8}return\s+str\(self\.key\)/m) })
+({ test: () => assert.match(code, /^\s{8}return\s+str\(\s*self\.key\s*\)/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md b/curriculum/challenges/portuguese/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
index 2bd9f622fc6..fcde9937550 100644
--- a/curriculum/challenges/portuguese/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
+++ b/curriculum/challenges/portuguese/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
@@ -13,16 +13,12 @@ Bom trabalho! Você completou a parte final do projeto prático de _Formulário
 
 # --hints--
 
-Você deve usar o seletor `a`.
-
-```js
-assert.exists(new __helpers.CSSHelp(document).getStyle('a'));
-```
 
 Você deve dar ao elemento `a` uma `color` com o valor de `#dfdfe2`.
 
 ```js
-assert.equal(new __helpers.CSSHelp(document).getStyle('a')?.color, 'rgb(223, 223, 226)');
+const linkElement = document.querySelector("a");
+assert.equal(window.getComputedStyle(linkElement)?.color, 'rgb(223, 223, 226)');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c48df8674cf2b91020ecc.md b/curriculum/challenges/portuguese/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c48df8674cf2b91020ecc.md
index d9660cc4fba..d9a9cb17652 100644
--- a/curriculum/challenges/portuguese/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c48df8674cf2b91020ecc.md
+++ b/curriculum/challenges/portuguese/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646c48df8674cf2b91020ecc.md
@@ -17,7 +17,7 @@ Você deve ter um elemento `link`.
 assert.match(code, /<link/)
 ```
 
-Your `link` element should have a `rel` and `href` attribute set to `stylesheet` and `./styles.css`.
+O elemento `link` deve ter os atributos `rel` e `href` definidos como `stylesheet` e `./styles.css`.
 
 ```js
 assert.match(code, /<link\s+(rel=("|')stylesheet\2\s+href=("|')\.\/styles\.css\3|href=("|')\.\/styles\.css\4\s+rel=("|')stylesheet\5)\s*\/?>/)
diff --git a/curriculum/challenges/portuguese/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de5dc8988076a1d992afd.md b/curriculum/challenges/portuguese/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de5dc8988076a1d992afd.md
index 45e257410ca..d3aa9fc6b93 100644
--- a/curriculum/challenges/portuguese/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de5dc8988076a1d992afd.md
+++ b/curriculum/challenges/portuguese/14-responsive-web-design-22/learn-intermediate-css-by-building-a-cat-painting/646de5dc8988076a1d992afd.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Para fazer com que o olho direito pareça um olho, dê a ele um raio de borda de `60%`. Além disso, usando a propriedade `transform`, gire-o em `-25` graus.
+Para fazer com que o olho esquerdo pareça um olho, dê a ele um raio de borda de `60%`. Além disso, usando a propriedade `transform`, gire-o em `-25` graus.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
index 09412cc3a31..0ea718d968a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
@@ -10,11 +10,9 @@ dashedName: build-a-cash-register
 
 Here you'll build a cash register app that will return change to the customer based on the price of the item, the amount of cash provided by the customer, and the amount of cash in the cash drawer. You'll also need to show different messages to the user in different scenarios, such as when the customer provides too little cash or when the cash drawer doesn't have enough to issue the correct change.
 
-There are a few variables you'll need to use in your code:
+In the `script.js` file, you have been provided with the `price` and `cid` variables. The `price` variable is the price of the item, and the `cid` variable is the cash-in-drawer, which is a 2D array listing the available currency in the cash drawer.
 
-- `price`: the price of the item as a floating point number.
-- `cash`: the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
-- `cid`: cash-in-drawer, a 2D array listing available currency in the cash drawer.
+The other variable you will need add is the `cash` variable, which is the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
 
 If you'd like to test your application with different values for `price` and `cid`, make sure to declare them with the `let` keyword so they can be reassigned by our tests.
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
index 5dce6b05e2e..f82e0681c1d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
@@ -28,10 +28,10 @@ In this project, you'll build an app that will search for Pokémon by name or ID
 1. You should have an element with an `id` of `special-defense`
 1. You should have an element with an `id` of `speed`
 1. When the `#search-input` element contains the value `Red` and the `#search-button` element is clicked, an alert should appear with the text `Pokémon not found`
-1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
+1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the `#types` element should contain a single inner element with the value `ELECTRIC`. The `#types` element content should be cleared between searches
-1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
+1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed`elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the `#types` element should contain two inner elements with the text values `GHOST` and `POISON`, respectively. The `#types` element content should be cleared between searches
 
@@ -158,7 +158,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
+When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
 
 ```js
 async () => {
@@ -251,7 +251,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
+When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
 
 ```js
 async () => {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
index 432fd54bbfa..ab7c385867d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
@@ -11,7 +11,7 @@ Agora que você tem o valor de entrada, você precisa dividi-lo em um array de n
 
 O método `.split()` recebe uma string e divide-a em um array de strings. Você pode passar uma string de caracteres ou uma RegEx para usar como separador. Por exemplo, `string.split(",")` dividiria a string em cada vírgula e retornaria um array de strings.
 
-Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces seperating your values. Armazene o array em uma variável `array`.
+Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces separating your values. Armazene o array em uma variável `array`.
 
 # --hints--
 
@@ -36,7 +36,7 @@ assert.match(code.toString(),  /array\s*=\s*value\.split()/);
 You should use `/,\s*/g` for the `split()` method's separator.
 
 ```js
-assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\)/);
+assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
index f235d8c32ce..a74ab01072c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
@@ -22,7 +22,7 @@ assert.match(calculate.toString(), /numbers/);
 Você deve usar o método `.map()` na variável `array`.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\)/);
+assert.match(calculate.toString(), /array\.map\(\s*\)/);
 ```
 
 Você deve atribuir o resultado da chamada de `.map()` para a variável `numbers`.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
index 8fabce1a697..a40b8c7c554 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
@@ -24,7 +24,7 @@ Adicione uma função de callback ao método `.map()` que converte cada elemento
 Your `.map()` method should have a callback function which takes an `el` parameter.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 A função de callback deve usar o construtor `Number` para converter `el` para um número.
@@ -42,7 +42,7 @@ assert.notMatch(calculate.toString(), /new/);
 A função de callback deve retornar o elemento convertido em um número.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
index b9eb41b149c..00dbe828521 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
@@ -24,13 +24,13 @@ assert.match(calculate.toString(), /filtered/);
 A função `calculate` deve usar o método `.filter()` no array `numbers`.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\)/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*\)/)
 ```
 
 Você deve atribuir o resultado de `numbers.filter()` à variável `filtered`.
 
 ```js
-assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\)/);
+assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
index 320827ed898..955d2b9a5e1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
@@ -26,7 +26,7 @@ Adicione uma função de retorno ao método `.filter()` que retorna `true` se o
 Your `.filter()` method should have a callback which accepts `el` as a parameter.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use `!` and `isNaN()` to check if `el` is NOT `NaN`.
@@ -38,7 +38,7 @@ assert.match(calculate.toString(), /!\s*(Number\.)?isNaN\(\s*el\s*\)/);
 A função de retorno deve retornar elementos que não são `NaN`.
 
 ```js
-assert.match(calculate.toString(), /(numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
index 90a0cf6fd86..bed20d29d87 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
@@ -28,20 +28,19 @@ assert.notMatch(calculate.toString(), /filtered/);
 Você deve encadear a chamada de `.filter()` com a chamada de `.map()`.
 
 ```js
-console.log(calculate.toString());
 assert.match(calculate.toString(), /array\.map\(.*\)\.filter\(/s);
 ```
 
 Você não deve remover a função de callback do método `.map()`.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 Você não deve remover a função de callback do método `.filter()`.
 
 ```js
-assert.match(calculate.toString(), /(\.filter\(\(?\s*el\s*\)?\s*=>|\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
+assert.match(calculate.toString(), /(\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
index 4ec1b9f57e2..9f01dc25e79 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
@@ -22,13 +22,13 @@ assert.match(getMean.toString(), /sum/);
 Your `getMean` function should use the `.reduce()` method of the `array` parameter.
 
 ```js
-assert.match(getMean.toString(), /array\.reduce\(\)/);
+assert.match(getMean.toString(), /array\.reduce\(\s*\)/);
 ```
 
 Você deve atribuir à variável `sum` o resultado de `array.reduce()`.
 
 ```js
-assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\)/);
+assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
index e3f6ffc7c17..74ac1cca1bf 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
@@ -22,13 +22,13 @@ Para a variável `sum`, passe uma função de callback para `.reduce()` que rece
 Your `reduce` method should have a callback function which takes an `acc` and an `el` parameters.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)/)
 ```
 
 O método `reduce` deve retornar a soma de `acc` e `el`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
index 151a61f0a4c..6df3cf2cfb2 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
@@ -22,7 +22,7 @@ Defina o valor inicial do acumulador como `0`.
 O método `reduce` deve ter `0` como valor inicial.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
index f89c12abdce..5025678d362 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
@@ -28,19 +28,19 @@ assert.notMatch(getMean.toString(), /mean\s*=/);
 Você não deve mudar a lógica dentro do método `reduce`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 Você deve dividir o resultado da chamada do método `reduce` pelo comprimento do array.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)\s*\/\s*array\.length/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 Você deve usar uma sintaxe de retorno implícito para retornar diretamente o resultado de `reduce` dividido pelo comprimento do array.
 
 ```js
-assert.match(code, /const\s+getMean\s*=\s*\(?array\)?\s*=>\s*array\.reduce\(\(acc\s*,\s*el\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
+assert.match(code, /const\s+getMean\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
index 04054c35a96..5b670668725 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
@@ -18,13 +18,13 @@ Para ordenar seus números do menor para o maior, passe uma função de callback
 Your `sort` method should have a callback function which takes an `a` and a `b` parameters.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)/)
 ```
 
 O método `sort` deve retornar o resultado da subtração de `b` por `a`.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
index b715073f63f..f1cabfb2e52 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
@@ -34,13 +34,13 @@ assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0
 If `array.length` is even, pass an array with the two middle numbers from the `sorted` array to the `getMean` function. The first item in the array argument should be the value at index `array.length / 2` from `sorted` and the second should use the value at the index `array.length / 2 - 1` from `sorted`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:/);
 ```
 
 Se `array.length` for ímpar, sua variável `median` deverá atribuir o número do meio à variável `median`. O número do meio é o valor de `sorted` em `Math.floor(array.length / 2)`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:\s*sorted\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\)\];/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:\s*sorted\s*\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\s*\)\s*\]\s*;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
index 0617dc391c9..fafafdda532 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
@@ -22,13 +22,13 @@ assert.match(calculate.toString(), /median\s*=/);
 A variável `median` deve ser atribuída ao valor de `getMedian(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /median\s*=\s*getMedian\(numbers\)/);
+assert.match(calculate.toString(), /median\s*=\s*getMedian\(\s*numbers\s*\)/);
 ```
 
 A função `calculate` deve consultar o DOM para encontrar o elemento `#median` e definir `textContent` como `median`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#median\1\)\.textContent\s*=\s*median/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#median\1\s*\)\.textContent\s*=\s*median/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
index 09412f463ef..bd18085c38f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
@@ -22,14 +22,13 @@ assert.match(getMode.toString(), /array\.forEach\(/);
 Your `.forEach()` method should have a callback function which takes an `el` parameter.
 
 ```js
-console.log(getMode.toString());
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)/);
 ```
 
 O método `.forEach()` deve incrementar a contagem para cada número. Não se esqueça do valor de fallback.
 
 ```js
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)\s*\{?\s*(return)?\s*counts\[\s*el\s*\]\s*=\s*\(\s*counts\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)\s*\{?\s*(return)?\s*counts\s*\[\s*el\s*\]\s*=\s*\(\s*counts\s*\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
index 1dcc193af7c..1bcea19fb0c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
@@ -24,19 +24,19 @@ assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.so
 A função `getMode` deve passar uma função de callback para o método `sort` com os parâmetros `a` e `b`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)/)
 ```
 
 A função `getMode` deve usar o método `sort` para ordenar o array `Object.keys()` e retornar o valor de `counts[b]` menos o valor de `counts[a]`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)/)
 ```
 
 A variável `highest` deve ter o valor da primeira entrada do array `Object.keys(counts)` ordenado.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)\[0\];/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)\s*\[\s*0\s*\]\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
index 860947f0f50..a21f4a7e155 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
@@ -20,13 +20,13 @@ assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filte
 O método `.filter()` deve receber uma função de callback que recebe o parâmetro `el`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)/);
 ```
 
 O método `.filter()` deve retornar se o valor de `counts[el]` é igual a `counts[highest]`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\[\s*el\s*\]\s*===\s*counts\[\s*highest\s*\];\s*\}/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\s*\[\s*el\s*\]\s*===\s*counts\s*\[\s*highest\s*\]\s*;\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
index a5a14373877..7cf357bd9dc 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /mode\s*=\s*getMode\(\s*numbers\s*\);/);
 A função `calculate` deve consultar o DOM para encontrar o elemento `#mode` e definir seu `textContent` como `mode`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#mode\1\)\.textContent\s*=\s*mode;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#mode\1\s*\)\.textContent\s*=\s*mode;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
index b3dcd8f019f..a19137de361 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
@@ -12,7 +12,10 @@ O próximo cálculo é o <dfn>intervalo</dfn>, que é a diferença entre o maior
 Você aprendeu anteriormente sobre o objeto global `Math`. `Math` tem um método `.min()` para obter o menor número de uma série de números, bem como um método `.max()` para obter o maior número. Aqui temos um exemplo que obtém o menor número de um array:
 
 ```js
-Math.min(1, 9, 11, -3, 0.5);
+const numbersArr = [2, 3, 1];
+
+console.log(Math.min(...numbersArr));
+// Expected output: 1
 ```
 
 Declare uma função `getRange`, que recebe o mesmo parâmetro `array` que você está usando. Usando `Math.min()`, `Math.max()` e o operador de spread, retorne a diferença entre o maior e menor número da lista.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
index 1293462e812..d855de5ff71 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
@@ -14,13 +14,13 @@ Adicione a lógica para calcular e exibir o intervalo para a função `calculate
 A função `calculate` deve definir uma variável `range` para o resultado de `getRange(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /range\s*=\s*getRange\(numbers\);/);
+assert.match(calculate.toString(), /range\s*=\s*getRange\(\s*numbers\s*\);/);
 ```
 
 A função `calculate` deve definir o `textContent` do elemento `#range` para a variável `range`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#range\1\)\.textContent\s*=\s*range;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#range\1\s*\)\.textContent\s*=\s*range;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
index ce64d4b2a28..87b09943768 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
@@ -26,13 +26,13 @@ assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(/);
 A variável `differences` deve usar o parâmetro `el` na função de callback.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 A callback `map` deve retornar o valor de `el` menos `mean`.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
index a02218b65a7..f483c136778 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
@@ -28,13 +28,13 @@ assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\
 A variável `squaredDifferences` deve usar o parâmetro `el` na função de callback.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 A função de callback de `map` deve retornar o valor de `el` ao quadrado.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
 ```
 
 A função de callback de `map` deve usar o operador `**`.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
index f9ed6f0ba83..ecb0a228d62 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
@@ -28,14 +28,13 @@ assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDiffere
 A variável `sumSquaredDifferences` deve usar os parâmetros `acc` e `el` na função de callback.
 
 ```js
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 O método `reduce` da função de callback deve retornar a soma de `acc` e `el`.
 
 ```js
-console.log(getVariance.toString());
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
index 06dc54c22d6..0d2a036aa92 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
@@ -46,19 +46,19 @@ assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(/);
 A variável `variance` deve usar os parâmetros `acc` e `el` na função de callback.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 A função de callback de `reduce` deve estar vazia.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}/);
 ```
 
 A função de callback de `reduce` deve ter um valor inicial igual a `0`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}\s*,\s*0\s*\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
index 2647733aa77..36488be0a70 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
@@ -14,37 +14,37 @@ Dentro da função de callback de `.reduce()` vazia, declare uma variável `diff
 A função de callback de `reduce` deve ter uma variável `difference`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=/);
 ```
 
 A variável `difference` deve ser definida com o valor de `el` menos `mean`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
 ```
 
 A função de callback de `reduce` deve ter uma variável `squared`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
 ```
 
 A variável `squared` deve estar definida com o valor de `difference` na 2ª potência.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
 ```
 
 A função de callback de `reduce` deve retornar o valor de `acc` mais `squared`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
 ```
 
 Você não deve remover o valor inicial de `0` do método `.reduce()`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
index cecb2070f29..2be4b1623dc 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
@@ -16,7 +16,7 @@ Divida a chamada de `.reduce()` pelo comprimento do array (na declaração de `v
 Você deve dividir o resultado da chamada de `.reduce()` pelo comprimento do array.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)\s*\/\s*array\.length;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)\s*\/\s*array\.length;/);
 ```
 
 Você deve retornar o valor de `variance`.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
index c8a6a40f286..1e998040de0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /variance\s*=\s*getVariance\(\s*numbers\s*\)/
 Você deve definir o `textContent` do elemento `#variance` com o valor de `variance`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#variance\1\)\.textContent\s*=\s*variance/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#variance\1\s*\)\.textContent\s*=\s*variance/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
index 5f7eab201af..49dd3dbc2d3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
@@ -14,13 +14,13 @@ Agora atualize a função `calculate` para incluir a lógica do desvio padrão,
 A função `calculate` deve definir uma variável `standardDeviation` para o resultado de `getStandardDeviation(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(numbers\)/);
+assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(\s*numbers\s*\)/);
 ```
 
 Você deve atualizar o `textContent` do elemento `#standardDeviation` para que ele seja a variável `standardDeviation`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#standardDeviation\1\)\.textContent\s*=\s*standardDeviation/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#standardDeviation\1\s*\)\.textContent\s*=\s*standardDeviation/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
index 28de37f7ba7..29b7227668c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
@@ -16,19 +16,19 @@ Para corrigir isso, adicione uma chamada vazia de `.slice()` antes do método `.
 Você deve chamar `.slice()` no parâmetro `array`.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)/);
 ```
 
 A chamada de `.sort()` deve ser encadeada à chamada de `.slice()`.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(/);
 ```
 
 Você não deve remover a função de callback do método `.sort()`.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
index bd7c17ed973..cec5e67d220 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
@@ -24,7 +24,7 @@ Use the `async` keyword to create an asynchronous arrow function called `fetchDa
 You should use the `async` keyword to create an asynchronous arrow function called `fetchData`.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*[^}]*\s*}/);
 ```
 
 `fetchData` should be defined.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
index b22a2bfb9d7..1e37c878244 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
@@ -22,7 +22,7 @@ Inside the `try` block, create a constant called `res` and assign it `await fetc
 
 # --hints--
 
-You should have a constant called `res` inside your `try` block.
+Você deve ter uma constante chamada `res` dentro do bloco `try`.
 
 ```js
 assert.match(code, /\s*const\s+res/)
@@ -37,7 +37,7 @@ assert.match(code, /\s*const\s+res\s*=\s*await\s+fetch\(\s*(.*)\s*\)/);
 You should pass in the `forumLatest` constant to the `fetch` call.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
index 8c6f096184c..9b9dd503d54 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+data/);
 You should assign `await res.json()` to the `data` variable.
 
 ```js
-assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\);?\s*/);
+assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
index fce8fb2e88a..9b34d98c18b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
@@ -28,7 +28,7 @@ assert.match(code, /\s*try\s*{[\s\S]*\s*console\.log\(\s*data\s*\)[\s\S]*}\s*cat
 You should call the `fetchData()` function, after the `fetchData()` function is defined.
 
 ```js
-assert.match(code, /};?\s*fetchData\(\)/);
+assert.match(code, /};?\s*fetchData\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
index 163bae94880..78fbead8d5d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
@@ -22,7 +22,7 @@ assert.match(code, /\s*showLatestPosts\(.*\);??\s*/);
 You should pass `data` as the argument to `showLatestsPosts()`.
 
 ```js
-assert.match(code, /\s*showLatestPosts\(data\);?\s*/);
+assert.match(code, /\s*showLatestPosts\(\s*data\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
index f7f57b40cce..16dbdd2dcc6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
@@ -20,7 +20,7 @@ assert.match(code, /\s*const\s+thousands\s*=/);
 Your should assign `Math.floor(views / 1000)` to your `thousands` variable.
 
 ```js
-assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(views\s*\/\s*1000\)\s*/);
+assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(\s*views\s*\/\s*1000\s*\)\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
index c661dc60782..4574889f3e0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
@@ -14,7 +14,7 @@ Inside the `if` statement, destructure `className` and `category` from the `allC
 You should destructure `className` and `category` from the `allCategories[id]` object. The properties can be in any order.
 
 ```js
-assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\[id\]\s*/g));
+assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\s*\[\s*id\s*\]\s*/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
index a7b0c8e43fb..2cac39c9097 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
@@ -27,19 +27,19 @@ Inside your `fetchData` function, add a `try...catch` statement. The `catch` blo
 You should have a `try` block inside your `fetchData` function.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
 ```
 
 You should have a `catch` block after your `try` block.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
 ```
 
 Your `catch` block should have an `err` parameter.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
 ```
 
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
index 4056412c5c4..5e61dae2205 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+postsContainer\s*=/);
 You should use `document.getElementById()` to get the `#posts-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)posts-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/);
 ```
 
 You should assign the `#posts-container` element to your `postsContainer` variable.
 
 ```js
-assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(('|"|`)posts-container\1\)/g));
+assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
index 0e1fdd991c9..6a8c5959c30 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
@@ -14,7 +14,7 @@ Você usará isto como um "ouvinte" de evento para o `sortButton`. Como os botõ
 A função `sortInputArray` deve chamar `event.preventDefault()`.
 
 ```js
-assert.match(sortInputArray.toString(), /event\.preventDefault\(\)/);
+assert.match(sortInputArray.toString(), /event\.preventDefault\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
index aba2ec34919..fb7bbaccd6d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*
 Você deve atribuir para `temp` o valor de `array[j]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?/);
 ```
 
 Você deve atribuir a `array[j]` o valor de `array[j + 1]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?/);
 ```
 
 Você deve atribuir a `array[j + 1]` o valor de `temp`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
index 6dbe609e9b7..993ebdaf9d7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
@@ -14,7 +14,7 @@ Por fim, após o término da execução do laço externo, retorne o array ordena
 A instrução `return` deve retornar a variável `array`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
index aedf0130424..55d26a6eb88 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
@@ -17,7 +17,7 @@ Você deve remover a chamada do `console.log()`.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(bubbleSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(bubbleSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
index 8a859b4bebb..d7f2c0d7331 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{
 Você deve atribuir a `array[i]` o valor de `temp`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]/)
 ```
 
 Você deve atribuir a `array[minIndex]` o valor de `array[i]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]/)
 ```
 
 Você deve atribuir a `temp` o valor de `array[minIndex]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
index 4b99d32c369..f0effd88e48 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
@@ -14,7 +14,7 @@ Por fim, após o término do laço externo, você precisa retornar o array. Depo
 Você deve utilizar o `return` do `array` depois que o laço externo for concluído.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
index f7b990936ae..e4f1699196b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
@@ -15,7 +15,7 @@ Você deve remover a instrução `console.log()` de `selectionSort()`.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(selectionSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(selectionSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
index c46fcacfe9e..8ab5dfa2882 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
@@ -16,7 +16,7 @@ Faça isso atribuindo o valor do índice `j` para o próximo índice.
 Antes de decrementar `j`, atribua o valor de `j` ao índice `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
index 0766a644d3a..64d936111a3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
@@ -16,7 +16,7 @@ Use o operador de atribuição para inserir o valor atual no índice correto.
 Você deve atribuir `currValue` ao índice `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
+assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
index 40dce75c27c..1f443bc8815 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
@@ -14,7 +14,7 @@ Após o término do laço `for`, você precisa retornar o array. Você deve pode
 A instrução `return` deve retornar o `array`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a23d1c5f1c93161f3582ae.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a23d1c5f1c93161f3582ae.md
index 7908cecc422..6a2756f19c8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a23d1c5f1c93161f3582ae.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a23d1c5f1c93161f3582ae.md
@@ -1,13 +1,13 @@
 ---
 id: 62a23d1c5f1c93161f3582ae
-title: Step 23
+title: Passo 23
 challengeType: 0
 dashedName: step-23
 ---
 
 # --description--
 
-Semelhante ao elemento `#stats`, o elemento `#monsterStats` necessita de dois elementos `span`. Dê a eles a classe `stat` e dê ao primeiro elemento o texto `Monster Name:` e ao segundo o texto `Health:`. Após o texto de cada um, adicione um elemento `strong` com um elemento `span` vazio aninhado. Give the first inner `span` element an `id` of `monsterName` and the second inner `span` element an `id` of `monsterHealth`.
+Semelhante ao elemento `#stats`, o elemento `#monsterStats` necessita de dois elementos `span`. Dê a eles a classe `stat` e dê ao primeiro elemento o texto `Monster Name:` e ao segundo o texto `Health:`. Após o texto de cada um, adicione um elemento `strong` com um elemento `span` vazio aninhado. Dê ao primeiro elemento `span` interno um `id` de `monsterName` e ao segundo elemento `span` interno um `id` de `monsterHealth`.
 
 # --hints--
 
@@ -68,7 +68,7 @@ assert.match(spans[0].innerHTML, /Monster Name:\s+<strong>/);
 assert.match(spans[1].innerHTML, /Health:\s+<strong>/);
 ```
 
-Your first inner `span` element should have an `id` of `monsterName`.
+O primeiro elemento `span` interno deve ter um `id` de `monsterName`.
 
 ```js
 const spans = document.querySelectorAll(`#monsterStats > span`);
@@ -77,7 +77,7 @@ const spanId = span?.id;
 assert.equal(spanId, 'monsterName');
 ```
 
-Your second inner `span` element should have an `id` of `monsterHealth`.
+O segundo elemento `span` interno deve ter um `id` de `monsterHealth`.
 
 ```js
 const spans = document.querySelectorAll(`#monsterStats > span`);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a24068d60b671847d1d4e2.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a24068d60b671847d1d4e2.md
index 98cb2473093..dbed671f52c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a24068d60b671847d1d4e2.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a24068d60b671847d1d4e2.md
@@ -7,7 +7,7 @@ dashedName: step-25
 
 # --description--
 
-Agora, precisamos de um estilo rápido. Start by giving the `body` a `background-color` set to `#0a0a23`.
+Agora, precisamos de um estilo rápido. Comece atribuindo ao `body` uma `background-color` definida como `#0a0a23`.
 
 # --hints--
 
@@ -18,7 +18,7 @@ const body = new __helpers.CSSHelp(document).getStyle('body');
 assert.exists(body);
 ```
 
-Your `body` selector should have a `background-color` property set to `#0a0a23`.
+O seletor `body` deve ter uma propriedade `background-color` definida como `#0a0a23`.
 
 ```js
 const background = new __helpers.CSSHelp(document).getStyle('body')?.getPropertyValue('background-color');
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a2409897ec621942234cf6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a2409897ec621942234cf6.md
index 4baece2d50e..00dd2886323 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a2409897ec621942234cf6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a2409897ec621942234cf6.md
@@ -7,7 +7,7 @@ dashedName: step-26
 
 # --description--
 
-Give the `#text` element a `background-color` of `#0a0a23`, a `color` of `#ffffff`, and `10px` of padding on all sides.
+Dê ao elemento `#text` uma `background-color` de `#0a0a23`, uma `color` de `#ffffff< /code> e <code>10px` de preenchimento em todos os lados. ​
 
 # --hints--
 
@@ -18,14 +18,14 @@ const text = new __helpers.CSSHelp(document).getStyle('#text');
 assert.exists(text);
 ```
 
-Your `#text` element should have a `background-color` of `#0a0a23`.
+O elemento `#text` deve ter uma `background-color` de `#0a0a23`.
 
 ```js
 const background = new __helpers.CSSHelp(document).getStyle('#text')?.getPropertyValue('background-color');
 assert.equal(background, 'rgb(10, 10, 35)');
 ```
 
-Your `#text` element should have a `color` of `#ffffff`.
+O elemento `#text` deve ter uma `color` de `#ffffff`.
 
 ```js
 const color = new __helpers.CSSHelp(document).getStyle('#text')?.getPropertyValue('color');
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a240c67f3dbb1a1e6d95ee.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a240c67f3dbb1a1e6d95ee.md
index 8fb09f188f4..22c5b69282b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a240c67f3dbb1a1e6d95ee.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a240c67f3dbb1a1e6d95ee.md
@@ -7,29 +7,29 @@ dashedName: step-27
 
 # --description--
 
-Dê ao `#game` uma largura máxima de `500px` e uma altura máxima de `400px`. Set the `background-color` to `#ffffff` and the `color` to `#ffffff`.
+Dê ao `#game` uma largura máxima de `500px` e uma altura máxima de `400px`. Defina `background-color` como `#ffffff` e `color` como `#ffffff`.
 
-Use margins to center it by setting the top margin to `30px`, bottom margin to `0px`, and the left and right margin to `auto`.
+Use as margens para centralizá-lo, definindo a margem superior como `30px`, a margem inferior como `0px` e as margens esquerda e direita como `auto`.
 
-Finally, give it `10px` of padding on all four sides.
+Finalmente, dê `10px` de preenchimento em todos os quatro lados.
 
 # --hints--
 
-You should have a `#game` selector.
+Você deve ter um seletor `#game`.
 
 ```js
 const game = new __helpers.CSSHelp(document).getStyle('#game');
 assert.exists(game);
 ```
 
-Your `#game` selector should have a `max-width` of `500px`.
+O seletor `#game` deve ter uma `max-width` de `500px`.
 
 ```js
 const maxWidth = new __helpers.CSSHelp(document).getStyle('#game')?.getPropertyValue('max-width');
 assert.equal(maxWidth, '500px');
 ```
 
-Your `#game` selector should have a `max-height` of `400px`.
+O seletor `#game` deve ter uma `max-height` de `400px`.
 
 ```js
 const maxHeight = new __helpers.CSSHelp(document).getStyle('#game')?.getPropertyValue('max-height');
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a24128d5e8af1b47ad1aab.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a24128d5e8af1b47ad1aab.md
index 7ec1e54eed2..6e68b4e33d9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a24128d5e8af1b47ad1aab.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a24128d5e8af1b47ad1aab.md
@@ -7,24 +7,24 @@ dashedName: step-28
 
 # --description--
 
-Using a selector list (`selector1, selector2`) give both your `#controls` and `#stats` elements a `border` of `1px solid #0a0a23`, a `#0a0a23` text color, and `5px` of `padding`.
+Usando uma lista de seletores (`selector1, selector2`) dê aos elementos `#controls` e `#stats` uma `border` de `1px solid #0a0a23`, uma cor de texto `#0a0a23` e `5px` de `padding`.
 
 # --hints--
 
-You should have a `#controls, #stats` selector list.
+Você deve ter uma lista de seletores `#controls, #stats`.
 
 ```js
 const selector = new __helpers.CSSHelp(document).getStyle('#controls, #stats');
 assert.exists(selector);
 ```
 
-Your `#controls, #stats` selector should have a `border` of `1px solid #0a0a23`.
+O seletor `#controls, #stats` deve ter uma `border` de `1px solid #0a0a23`.
 
 ```js
 assert.equal(new __helpers.CSSHelp(document).getStyle('#controls, #stats')?.border, '1px solid rgb(10, 10, 35)');
 ```
 
-Your `#controls, #stats` selector should have a `color` of `#0a0a23`.
+O seletor `#controls, #stats` deve ter uma `color` de `#0a0a23`.
 
 ```js
 const color = new __helpers.CSSHelp(document).getStyle('#controls, #stats')?.getPropertyValue('color');
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a24190868ca51c0b6e83c7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a24190868ca51c0b6e83c7.md
index 36cc033aeca..2f0a75f6f3b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a24190868ca51c0b6e83c7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a24190868ca51c0b6e83c7.md
@@ -1,6 +1,6 @@
 ---
 id: 62a24190868ca51c0b6e83c7
-title: Step 30
+title: Passo 30
 challengeType: 0
 dashedName: step-30
 ---
@@ -25,7 +25,7 @@ const display = new __helpers.CSSHelp(document).getStyle('#monsterStats')?.getPr
 assert.equal(display, 'none');
 ```
 
-Your `#monsterStats` selector should have a `border` of `1px solid #0a0a23`.
+O seletor `#monsterStats` deve ter uma `border` de `1px solid #0a0a23`.
 
 ```js
 const border = new __helpers.CSSHelp(document).getStyle('#monsterStats')?.getPropertyValue('border');
@@ -39,14 +39,14 @@ const padding = new __helpers.CSSHelp(document).getStyle('#monsterStats')?.getPr
 assert.equal(padding, '5px');
 ```
 
-Your `#monsterStats` selector should have a `color` of `#ffffff`.
+O seletor `#monsterStats` deve ter uma `color` de `#ffffff`.
 
 ```js
 const color = new __helpers.CSSHelp(document).getStyle('#monsterStats')?.getPropertyValue('color');
 assert.equal(color, 'rgb(255, 255, 255)');
 ```
 
-Your `#monsterStats` selector should have a `background-color` of `#c70d0d`.
+O seletor `#monsterStats` deve ter um `background-color` de `#c70d0d`.
 
 ```js
 const background = new __helpers.CSSHelp(document).getStyle('#monsterStats')?.getPropertyValue('background-color');
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a241df03c1f61ce936f5d9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a241df03c1f61ce936f5d9.md
index 4280adcc6a9..f2a5dbba2d1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a241df03c1f61ce936f5d9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a241df03c1f61ce936f5d9.md
@@ -7,7 +7,7 @@ dashedName: step-31
 
 # --description--
 
-Next, give your `.stat` elements a `padding-right` of `10px`.
+Em seguida, atribua aos elementos `.stat` um `padding-right` de `10px`.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
index e93d97812d0..e7ea9c9362b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
@@ -11,7 +11,7 @@ Uma das ferramentas mais poderosas é o console do desenvolvedor. Dependendo do
 
 O console do desenvolvedor incluirá erros produzidos pelo código, mas você também pode usá-lo para ver valores de variáveis no código, o que é útil para depuração.
 
-Adicione uma linha `console.log("Hello World");` entre as tags `script`. Em seguida, clique no botão "Console" para abrir o console. Você deve ver o texto `Hello World`.
+Adicione uma linha `console.log("Hello World");` entre as tags `script`. Em seguida, clique no botão "Console" para abrir o console. You should see the text `"Hello World"`.
 
 Observe como a linha termina com ponto e vírgula. É prática comum em JavaScript encerrar as linhas de código com ponto e vírgula.
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a0a3c0a4b32915d26a6e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a0a3c0a4b32915d26a6e.md
index dc1f18dfabc..f9c204999c8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a0a3c0a4b32915d26a6e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a0a3c0a4b32915d26a6e.md
@@ -15,7 +15,7 @@ Em JavaScript, uma <dfn>variável</dfn> é usada para armazenar um valor. Para u
 let camperbot;
 ```
 
-The `let` keyword tells JavaScript you are declaring a variable. Declare uma variável chamada `xp`.
+A palavra-chave `let` informa ao JavaScript que você está declarando uma variável. Declare uma variável chamada `xp`.
 
 # --hints--
 
@@ -25,7 +25,7 @@ Você não deve ter uma linha `console.log("Hello World");` no código.
 assert.notMatch(code, /console\.log\(\s*('|")Hello World\1\s*\)\s*;/);
 ```
 
-You should use the `let` keyword to declare your variable.
+Você deve usar a palavra-chave `let` para declarar a variável.
 
 ```js
 assert.match(code, /let/);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
index 9b803caaaa7..5871e00acfa 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
@@ -10,10 +10,10 @@ dashedName: step-7
 É possível <dfn>atribuir</dfn> um valor às variáveis. Quando você faz isso enquanto declara, isso se chama <dfn>inicialização</dfn>. Por exemplo:
 
 ```js
-let camperbot = "Bot";
+let age = 32;
 ```
 
-Isso inicializaria a variável `camperbot` com um valor de `Bot`, uma string.
+This would initialize the `age` variable with a value of `32`, a number.
 
 Inicialize a variável `xp` para que tenha um valor de `0`, um número.
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a75d8466a12e009eff76.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a75d8466a12e009eff76.md
index 0264de35165..022a36e168e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a75d8466a12e009eff76.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a75d8466a12e009eff76.md
@@ -11,7 +11,7 @@ Inicialize outra variável chamada `health` com um valor de `100`, e uma variáv
 
 # --hints--
 
-You should use `let` to declare a variable called `health`.
+Você deve usar `let` para declarar uma variável chamada `health`.
 
 ```js
 assert.match(code, /let\s+health/);
@@ -23,7 +23,7 @@ Você deve inicializar uma variável chamada `health` com um valor de `100`.
 assert.match(code, /let\s+health\s*=\s*100/);
 ```
 
-You should use `let` to declare a variable called `gold`.
+Você deve usar `let` para declarar uma variável chamada `gold`.
 
 ```js
 assert.match(code, /let\s+gold/);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a7e4f1060e2fc5ffb34b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a7e4f1060e2fc5ffb34b.md
index 7ad05eb6400..f9eb69b1e04 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a7e4f1060e2fc5ffb34b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a7e4f1060e2fc5ffb34b.md
@@ -7,7 +7,7 @@ dashedName: step-9
 
 # --description--
 
-Create another variable called `currentWeapon` and set it to `0`.
+Crie outra variável chamada `currentWeapon` e defina-a como `0`.
 
 Quando um nome de variável tem várias palavras, a convenção em JavaScript é usar o que chamamos <dfn>camelCase</dfn>. A primeira palavra é minúscula, e a primeira letra de cada palavra seguinte é maiúscula.
 
@@ -17,7 +17,7 @@ let thisIsCamelCase;
 
 # --hints--
 
-You should use `let` to declare a variable called `currentWeapon`.
+Você deve usar `let` para declarar uma variável chamada `currentWeapon`.
 
 ```js
 assert.match(code, /let\s+currentWeapon/i);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b3eab50e193608c19fc6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b3eab50e193608c19fc6.md
index 23205afeed9..37fbb1024c5 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b3eab50e193608c19fc6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b3eab50e193608c19fc6.md
@@ -7,7 +7,7 @@ dashedName: step-10
 
 # --description--
 
-Declare a variable called `fighting` but do not initialize it with a value. Lembre-se de terminar a linha com ponto e vírgula.
+Declare uma variável chamada `fighting` mas não a inicialize com um valor. Lembre-se de terminar a linha com ponto e vírgula.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
index 1189a0f1c6f..79113187210 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
@@ -15,7 +15,7 @@ let order = ["first", "second", "third"];
 
 Este é um array que tem três valores. Observe como os valores são separados por vírgulas.
 
-Altere a variável `inventory` para que seja um array com as strings `stick`, `dagger` e `sword`.
+Change your `inventory` variable to be an array with the strings `"stick"`, `"dagger"`, and `"sword"`.
 
 # --hints--
 
@@ -31,19 +31,19 @@ A variável `inventory` deve ter três valores.
 assert.lengthOf(inventory, 3);
 ```
 
-A variável `inventory` deve incluir a string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
 ```
 
-A variável `inventory` deve incluir a string `dagger`.
+Your `inventory` variable should include the string `"dagger"`.
 
 ```js
 assert.include(inventory, "dagger");
 ```
 
-A variável `inventory` deve incluir a string `sword`.
+Your `inventory` variable should include the string `"sword"`.
 
 ```js
 assert.include(inventory, "sword");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
index 1703192e73a..3313490a186 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-Por enquanto, você quer que o jogador comece apenas com o `stick`. Altere o array `inventory` para que tenha `stick` como o único valor.
+For now, you want the player to start with just the `"stick"`. Change the `inventory` array to have `"stick"` as its only value.
 
 # --hints--
 
@@ -23,7 +23,7 @@ A variável `inventory` deve ter somente um valor.
 assert.lengthOf(inventory, 1);
 ```
 
-A variável `inventory` deve incluir a string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
index 590d7e9bb20..84e4fe1983b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
@@ -33,10 +33,10 @@ Você deve usar `document.querySelector()`.
 assert.match(code, /document\.querySelector/);
 ```
 
-Você deve usar o seletor `#button1`.
+You should use the `"#button1"` selector.
 
 ```js
-assert.match(code, /querySelector\(('|")#button1\1\)/);
+assert.match(code, /querySelector\(\s*('|")#button1\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
index 7b04a6370d5..692610fea81 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
@@ -9,13 +9,15 @@ dashedName: step-40
 
 `button1` representa o primeiro elemento `button`. Esses elementos têm uma propriedade especial chamada `onclick`, que você pode usar para determinar o que acontece quando alguém clica nesse botão.
 
-Você pode acessar as propriedades em JavaScript de algumas maneiras diferentes. A primeira é com a <dfn>notação de ponto</dfn>. Acessar a propriedade `onclick` de um botão teria essa aparência:
+Você pode acessar as propriedades em JavaScript de algumas maneiras diferentes. A primeira é com a <dfn>notação de ponto</dfn>. Aqui está um exemplo de como usar a notação de ponto para referenciar uma função na propriedade `onclick` de um botão.
 
 ```js
-button.onclick
+button.onclick = myFunction;
 ```
 
-Use dot notation to set the `onclick` property of your `button1` to the function reference of `goStore`. Note that `button1` is already declared, so you don't need to use `let` or `const`.
+Neste exemplo, `button` é o elemento, e `myFunction` é uma referência à função. Quando o botão é clicado, `myFunction` é chamada.
+
+Use a notação de ponto para definir a propriedade `onclick` do seu `button1` como a referência da função `goStore`. Observe que `button1` já está declarado, então você não precisa usar `let` ou `const`.
 
 # --hints--
 
@@ -31,10 +33,10 @@ Você não deve usar `let` ou `const`.
 assert.notMatch(code, /(let|const)\s+button1\.onclick/);
 ```
 
-You should assign the `goStore` function reference to `button1.onclick`.
+Você deve atribuir a referência da função `goStore` a `button1.onclick`. Certifique-se de não chamar a função.
 
 ```js
-assert.match(code, /button1\.onclick\s*=\s*goStore/);
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
index 0b551690b74..6ce467cca84 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
@@ -13,6 +13,12 @@ Assim que você tiver feito isso, abra o console e tente clicar nos botões do p
 
 # --hints--
 
+You should assign the `goStore` function reference to `button1.onclick`. Certifique-se de não chamar a função.
+
+```js
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
+```
+
 Você deve usar a notação do ponto para acessar a propriedade `onclick` do `button2`.
 
 ```js
@@ -25,10 +31,10 @@ Você não deve usar `let` ou `const` para atribuir `button2.onclick`.
 assert.notMatch(code, /(let|const)\s+button2\.onclick/);
 ```
 
-Você deve definir a propriedade `onclick` de `button2` como sendo a variável `goCave`.
+You should assign the `goCave` function reference to `button2.onclick`. Certifique-se de não chamar a função.
 
 ```js
-assert.match(code, /button2\.onclick\s*=\s*goCave/);
+assert.match(code, /button2\.onclick\s*=\s*goCave\s*;?\s*$/m);
 ```
 
 Você deve usar a notação do ponto para acessar a propriedade `onclick` do `button3`.
@@ -43,10 +49,10 @@ Você não deve usar `let` ou `const` para atribuir `button3.onclick`.
 assert.notMatch(code, /(let|const)\s+button3\.onclick/);
 ```
 
-Você deve definir a propriedade `onclick` de `button3` como sendo a variável `fightDragon`.
+You should assign the `fightDragon` function reference to `button3.onclick`. Certifique-se de não chamar a função.
 
 ```js
-assert.match(code, /button3\.onclick\s*=\s*fightDragon/);
+assert.match(code, /button3\.onclick\s*=\s*fightDragon\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
index bfbb1dcf690..0c6ef4e1d92 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-Por enquanto, faça a função `goStore` retornar a mensagem `Going to store.` para o console. Por exemplo, aqui está uma função que produz a mensagem `Hello World`.
+For now, make your `goStore` function output the message `"Going to store."` to the console. For example, here is a function that outputs the message `"Hello World"`.
 
 ```js
 function functionName() {
@@ -20,13 +20,13 @@ function functionName() {
 Você deve ter uma linha `console.log("Going to store.");` no código. Não se esqueça do ponto e vírgula.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to store\.\1\);/);
+assert.match(code, /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 A linha `console.log("Going to store.");` deve estar na função `goStore`.
 
 ```js
-assert.match(goStore.toString(), /console\.log\(('|")Going to store\.\1\);/);
+assert.match(goStore.toString(), /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
index ec290bf790d..013b0e0a2d3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
@@ -7,7 +7,7 @@ dashedName: step-37
 
 # --description--
 
-Agora, crie uma função `goCave` que imprima `Going to cave.` no console.
+Now create a `goCave` function that prints `"Going to cave."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(goCave);
 Você deve ter uma linha `console.log("Going to cave.");` no código.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 A linha `console.log("Going to cave.");` deve estar dentro da função `goCave`.
 
 ```js
-assert.match(goCave.toString(), /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(goCave.toString(), /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
index fb990e1a3f4..59993936a0e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
@@ -7,7 +7,7 @@ dashedName: step-38
 
 # --description--
 
-Agora, crie uma função `fightDragon` que imprima `Fighting dragon.` no console.
+Now create a `fightDragon` function that prints `"Fighting dragon."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(fightDragon);
 Você deve ter uma linha `console.log("Fighting dragon.");` no código.
 
 ```js
-assert.match(code, /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 A linha `console.log("Fighting dragon.");` deve estar dentro da função `fightDragon`.
 
 ```js
-assert.match(fightDragon.toString(), /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(fightDragon.toString(), /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
index 5ee249abb21..18494f3156f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
@@ -9,21 +9,25 @@ dashedName: step-42
 
 A propriedade `innerText` controla o texto que aparece em um elemento HTML. Por exemplo:
 
-```js
-const info = document.querySelector("#info");
-info.innerText = "Hello World";
+```html
+<p id="info">Demo content</p> 
 ```
 
-Esse código mudará o elemento atribuído à variável `info` para ter o texto `Hello World`.
+```js
+const info = document.querySelector("#info"); 
+info.innerText = "Hello World"; 
+```
 
-Quando o jogador clicar no botão `Go to store`, você vai querer alterar os botões e o texto. Remova o código dentro da função `goStore` e adicione uma linha que atualize o texto do `button1` para que diga `Buy 10 health (10 gold)`.
+The following example would change the text of the `p` element from `Demo content` to `Hello World`.
+
+Quando o jogador clicar no botão `Go to store`, você vai querer alterar os botões e o texto. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `"Buy 10 health (10 gold)"`.
 
 # --hints--
 
 Você não deve ter uma linha `console.log("Going to store.");` no código.
 
 ```js
-assert.notMatch(code, /console\.log\(('|")Going to store\.\1\)/);
+assert.notMatch(code, /console\.log\(\s*('|")Going to store\.\1\s*\)/);
 ```
 
 Você deve usar notação do ponto para acessar a propriedade `innerText` do `button1`.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
index b38eb9189f4..346179d245c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Agora, adicione uma linha que atualize o texto do `button2` para que diga `Buy weapon (30 gold)` e atualize o texto do `button3` para que diga `Go to town square`.
+Now, add a line that updates the text of `button2` to say `"Buy weapon (30 gold)"` and update the text of `button3` to say `"Go to town square"`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ Você não deve usar `let` ou `const` para acessar a propriedade `innerText` do
 assert.notMatch(code, /(let|const)\s+button2\.innerText/);
 ```
 
-Você deve atualizar a propriedade `innerText` do `button2` para que seja `Buy weapon (30 gold)`.
+You should update the `innerText` property of `button2` to be `"Buy weapon (30 gold)"`.
 
 ```js
 assert.match(code, /button2\.innerText\s*=\s*('|")Buy weapon \(30 gold\)\1/);
@@ -47,7 +47,7 @@ Você não deve usar `let` ou `const` para acessar a propriedade `innerText` do
 assert.notMatch(code, /(let|const)\s+button3\.innerText/);
 ```
 
-Você deve atualizar a propriedade `innerText` do `button3` para que seja `Go to town square`.
+You should update the `innerText` property of `button3` to be `"Go to town square"`.
 
 ```js
 assert.match(code, /button3\.innerText\s*=\s*('|")Go to town square\1/);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
index 84f22c8f018..45e2039f817 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Agora, você precisa modificar o texto de exibição. Altere a propriedade `innerText` de `text` para que seja `You enter the store.`.
+Agora, você precisa modificar o texto de exibição. Change the `innerText` property of the `text` to be `"You enter the store."`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ Você não deve usar `let` ou `const` para acessar a propriedade `innerText` do
 assert.notMatch(code, /(let|const)\s+text\.innerText/);
 ```
 
-Você deve atualizar a propriedade `innerText` do `text` para que seja `You enter the store.`.
+You should update the `innerText` property of `text` to be `"You enter the store."`.
 
 ```js
 assert.match(code, /text\.innerText\s*=\s*('|")You enter the store.\1/);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
index d12a18c9c84..fa9cd339ca2 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
@@ -7,25 +7,25 @@ dashedName: step-48
 
 # --description--
 
-Na função `goTown`, altere as propriedades `innerText` dos elementos `button` para que sejam `Go to store`, `Go to cave` e `Fight dragon`. Atualize as propriedades `onclick` para que sejam `goStore`, `goCave` e `fightDragon`, respectivamente.
+In your `goTown` function, change your `button` elements' `innerText` properties to be `"Go to store"`, `"Go to cave"`, and `"Fight dragon"`. Atualize as propriedades `onclick` para que sejam `goStore`, `goCave` e `fightDragon`, respectivamente.
 
-Finally, update `innerText` property of your `text` to be `You are in the town square. You see a sign that says Store.`.
+Finally, update `innerText` property of your `text` to be `"You are in the town square. You see a sign that says Store."`.
 
 # --hints--
 
-Você deve definir a propriedade `button1.innerText` para que seja `Go to store` na função `goTown`.
+You should set the `button1.innerText` property to be `"Go to store"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-Você deve definir a propriedade `button2.innerText` para que seja `Go to cave` na função `goTown`.
+You should set the `button2.innerText` property to be `"Go to cave"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-Você deve definir a propriedade `button3.innerText` para que seja `Fight dragon` na função `goTown`.
+You should set the `button3.innerText` property to be `"Fight dragon"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -49,7 +49,7 @@ Você deve definir a propriedade `button3.onclick` para que seja `fightDragon` n
 assert.match(goTown.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-Você deve definir a propriedade `text.innerText` como sendo `You are in the town square. You see a sign that says Store.` na sua função `goTown`.
+You should set the `text.innerText` property to be `"You are in the town square. You see a sign that says Store."` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /text\.innerText\s*=\s*('|")You are in the town square. You see a sign that says Store\.\1/);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
index f111df29c5d..c5e71d433b5 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
@@ -28,7 +28,7 @@ assert.match(code, /function\s+update/);
 A função `update` deve receber um parâmetro chamado `location`.
 
 ```js
-assert.match(update.toString(), /update\(location\)/);
+assert.match(update.toString(), /update\(\s*location\s*\)/);
 ```
 
 A função `update` deve estar vazia.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
index d9c856e55e4..06dd75857c5 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-As <dfn>propriedades</dfn> de objeto são escritas como pares de `key: value`, onde `key` é o nome da propriedade (ou a chave) e `value` é o valor que a propriedade possui. Por exemplo, aqui está um objeto com a chave `name` definida como `Quincy Larson`.
+As <dfn>propriedades</dfn> de objeto são escritas como pares de `key: value`, onde `key` é o nome da propriedade (ou a chave) e `value` é o valor que a propriedade possui. For example, here is an object with a key of `name` set to `"Quincy Larson"`.
 
 ```js
 {
@@ -15,7 +15,7 @@ As <dfn>propriedades</dfn> de objeto são escritas como pares de `key: value`, o
 }
 ```
 
-Adicione uma propriedade `name` ao objeto vazio e dê a ela um valor de `town square`.
+Add a `name` property to your empty object and give it a value of `"town square"`.
 
 # --hints--
 
@@ -31,7 +31,7 @@ O primeiro valor de `locations` deve ter uma propriedade `name`.
 assert.isDefined(locations[0].name);
 ```
 
-O primeiro valor de `locations` deve ter uma propriedade `name` com valor de `town square`.
+Your first value of `locations` should have a `name` property with a value of `"town square"`.
 
 ```js
 assert.equal(locations[0].name, "town square");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
index b29cf050733..277fc41f3f7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
@@ -25,19 +25,19 @@ assert.isString(locations[0]["button text"][1]);
 assert.isString(locations[0]["button text"][2]);
 ```
 
-O primeiro valor no array `button text` deve ser "Go to store".
+The first value in the `button text` array should be `"Go to store"`.
 
 ```js
 assert.equal(locations[0]["button text"][0], "Go to store");
 ```
 
-O segundo valor no array `button text` deve ser "Go to cave".
+The second value in the `button text` array should be `"Go to cave"`.
 
 ```js
 assert.equal(locations[0]["button text"][1], "Go to cave");
 ```
 
-O terceiro valor no array `button text` deve ser "Fight dragon".
+The third value in the `button text` array should be `"Fight dragon"`.
 
 ```js
 assert.equal(locations[0]["button text"][2], "Fight dragon");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
index 7c2c0a1c2c1..4d32bbf9b92 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
@@ -7,7 +7,7 @@ dashedName: step-57
 
 # --description--
 
-Adicione uma propriedade final ao objeto chamada `text`. Give this property the same string value as the one assigned to `text.innerText` in the `goTown` function.
+Adicione uma propriedade final ao objeto chamada `text`. Dê a essa propriedade o mesmo valor de string atribuído a `text.innerText` na função `goTown`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ A propriedade `text` deve ser uma string.
 assert.isString(locations[0]["text"]);
 ```
 
-A função `text` deve ter o valor de `You are in the town square. You see a sign that says \"Store\".`
+Your `text` property should have the value `"You are in the town square. You see a sign that says \"Store\"."`
 
 ```js
 assert.equal(locations[0]["text"], "You are in the town square. You see a sign that says \"Store\".");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
index 608392a880d..7e65fc5d27c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
@@ -37,7 +37,7 @@ O segundo objeto de `locations` deve ter uma propriedade `button text` que é um
 assert.isArray(locations[1]["button text"]);
 ```
 
-A propriedade `button text` deve ter os valores de string `Buy 10 health (10 gold)`, `Buy weapon (30 gold)` e `Go to town square`.
+Your `button text` property should have the string values `"Buy 10 health (10 gold)"`, `"Buy weapon (30 gold)"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[1]["button text"][0], "Buy 10 health (10 gold)");
@@ -65,7 +65,7 @@ O segundo objeto de `locations` deve ter uma propriedade `text` que é uma strin
 assert.isString(locations[1].text);
 ```
 
-O segundo objeto `locations` deve ter uma propriedade `text` com o valor de `You enter the store.`.
+Your second `locations` object should have a `text` property with the value of `"You enter the store."`.
 
 ```js
 assert.equal(locations[1].text, "You enter the store.");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
index 5296b7af3d2..5096c127920 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
@@ -11,19 +11,19 @@ Agora você pode consolidar um pouco do código. Comece copiando o código de de
 
 # --hints--
 
-A função `update` deve definir `button1.innerText` para `Go to store`.
+Your `update` function should set `button1.innerText` to `"Go to store"`.
 
 ```js
 assert.match(update.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-A função `update` deve definir `button2.innerText` para `Go to cave`.
+Your `update` function should set `button2.innerText` to `"Go to cave"`.
 
 ```js
 assert.match(update.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-A função `update` deve definir `button3.innerText` para `Fight dragon`.
+Your `update` function should set `button3.innerText` to `"Fight dragon"`.
 
 ```js
 assert.match(update.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -47,7 +47,7 @@ A função `update` deve definir `button3.onclick` para `fightDragon`.
 assert.match(update.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-A função `update` deve definir `text.innerText` como `You are in the town square. You see a sign that says \"Store\".`.
+Your `update` function should set `text.innerText` to `"You are in the town square. You see a sign that says \"Store\"."`.
 
 ```js
 assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town square. You see a sign that says \\"Store\\"\."/);
@@ -56,13 +56,13 @@ assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town squa
 A função `goTown` deve estar vazia.
 
 ```js
-assert.match(goTown.toString(), /function goTown\(\) \{\}/);
+assert.match(goTown.toString(), /function goTown\(\s*\) \{\}/);
 ```
 
 A função `goStore` deve estar vazia.
 
 ```js
-assert.match(goStore.toString(), /function goStore\(\) \{\}/);
+assert.match(goStore.toString(), /function goStore\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
index 3d6e3797e88..8485660d4d1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
@@ -20,13 +20,13 @@ myFunction();
 Você deve chamar a função `update` na função `goTown`.
 
 ```js
-assert.match(goTown.toString(), /update\(\)/);
+assert.match(goTown.toString(), /update\(\s*\)/);
 ```
 
 Não se esqueça de terminar com ponto e vírgula.
 
 ```js
-assert.match(goTown.toString(), /update\(\);/);
+assert.match(goTown.toString(), /update\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
index 719ab05e821..eb1b16aa110 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
@@ -20,7 +20,7 @@ Passe o array `locations` na chamada de `update`.
 Agora, você deve passar o array `locations` para a chamada de `update`.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
index 2abbb7c4951..e85c2d9191a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
@@ -7,7 +7,7 @@ dashedName: step-62
 
 # --description--
 
-O array `locations` contém dois locais: a praça da cidade (em inglês, `town square`) e a loja (em inglês, `store`). No momento, você está passando esse array inteiro para a função de `update`.
+The `locations` array contains two locations: the `"town square"` and the `"store"`. No momento, você está passando esse array inteiro para a função de `update`.
 
 Passe apenas o primeiro elemento do array `locations` adicionando `[0]` no final da variável. Por exemplo: `myFunction(arg[0]);`.
 
@@ -18,25 +18,25 @@ Isso é chamado de <dfn>notação de colchete</dfn>. Valores em um array são ac
 Você deve usar a notação de colchetes com `locations`.
 
 ```js
-assert.match(code, /locations\[/);
+assert.match(code, /locations\s*\[/);
 ```
 
 Você deve acessar o primeiro objeto no array `locations`. Lembre-se de que os arrays são baseados em zero.
 
 ```js
-assert.match(code, /locations\[0\]/);
+assert.match(code, /locations\s*\[\s*0\s*\]/);
 ```
 
 Agora, você deve passar o primeiro objeto no array `locations` para a função `update`.
 
 ```js
-assert.match(code, /update\(locations\[0\]\);/);
+assert.match(code, /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 Esta chamada ainda deve estar na função `goTown()`.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\[0\]\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
index 38ae9a4a8f0..0402a4098d1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
@@ -9,20 +9,20 @@ dashedName: step-63
 
 Agora, a função `update` precisa usar o argumento que você passa dentro dela.
 
-Dentro da função `update`, altere o valor de atribuição de `button1.innerText` para que seja `location["button text"]`. Desse modo, você usará a notação de colchetes para obter a propriedade `button text` do objeto `location` passado para a função.
+Dentro da função `update`, altere o valor de atribuição de `button1.innerText` para que seja `location["button text"]`. That way, you use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 # --hints--
 
-A função `update` deve usar a notação de colchete para obter a propriedade `button text` do objeto `location` passado para a função.
+Your `update` function should use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 ```js
 assert.match(update.toString(), /location[('|")button text\1]/);
 ```
 
-Você deve atribuir o valor da propriedade `button text` do objeto `location` para a propriedade `innerText` do `button1`.
+You should assign the value of the `"button text"` property of the `location` object to the `innerText` property of `button1`.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
index 5f331afe67c..25012d646ef 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
@@ -7,20 +7,20 @@ dashedName: step-64
 
 # --description--
 
-`location["button text"]` é um array com três elementos. Mude a atribuição do `button1.innerText` para que seja o primeiro elemento desse array.
+`location["button text"]` é um array com três elementos. Change the `button1.innerText` assignment to be `location["button text"][0]` which represents the first element of the array.
 
 # --hints--
 
-You should access the first element of the `button text` property of the `location` parameter.
+You should access the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.innerText` property to be the first element of the `button text` property of the `location` parameter.
+You should set the `button1.innerText` property to be the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
index 7775157faa0..0edf7fe34b0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
@@ -7,32 +7,32 @@ dashedName: step-65
 
 # --description--
 
-Agora, atualize `button2.innerText` e `button3.innerText` para que recebam o segundo e o terceiro valor do array `button text`, respectivamente.
+Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `"button text"` array, respectively.
 
 # --hints--
 
-You should access the second element of the `button text` property of the `location` parameter.
+You should access the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.innerText` property to be the second element of the `button text` property of the `location` parameter.
+You should set the `button2.innerText` property to be the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.innerText\s*=\s*location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /button2\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button text` property of the `location` parameter.
+You should access the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.innerText` property to be the third element of the `button text` property of the `location` parameter.
+You should set the `button3.innerText` property to be the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.innerText\s*=\s*location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /button3\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
index dc0608cfcfa..f2c564885d1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
@@ -7,44 +7,44 @@ dashedName: step-66
 
 # --description--
 
-Seguindo o mesmo padrão que você usou para o texto do botão, atualize a atribuição de `onclick` dos três botões para que sejam o primeiro, o segundo e o terceiro valor do array `button functions`.
+Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `"button functions"` array.
 
 # --hints--
 
-You should access the first element of the `button functions` property of the `location` parameter.
+You should access the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.onclick` property to be the first element of the `button functions` property of the `location` parameter.
+You should set the `button1.onclick` property to be the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.onclick\s*=\s*location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /button1\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should access the second element of the `button functions` property of the `location` parameter.
+You should access the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.onclick` property to be the second element of the `button functions` property of the `location` parameter.
+You should set the `button2.onclick` property to be the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.onclick\s*=\s*location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /button2\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button functions` property of the `location` parameter.
+You should access the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.onclick` property to be the third element of the `button functions` property of the `location` parameter.
+You should set the `button3.onclick` property to be the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.onclick\s*=\s*location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /button3\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
index 9c635a27bad..96ff588ed50 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
@@ -22,7 +22,7 @@ assert.match(goStore.toString(), /update\(/);
 A função `goStore` deve passar o segundo elemento do array `locations` como argumento para `update()`.
 
 ```js
-assert.match(goStore.toString(), /update\(locations\[1\]\)/);
+assert.match(goStore.toString(), /update\(\s*locations\s*\[\s*1\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
index ff38e52cebc..95a85c003d3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
@@ -26,13 +26,13 @@ assert.isFunction(fightBeast);
 `fightSlime` deve estar vazia.
 
 ```js
-assert.match(fightSlime.toString(), /function fightSlime\(\) \{\}/);
+assert.match(fightSlime.toString(), /function fightSlime\(\s*\) \{\}/);
 ```
 
 `fightBeast` deve estar vazia.
 
 ```js
-assert.match(fightBeast.toString(), /function fightBeast\(\) \{\}/);
+assert.match(fightBeast.toString(), /function fightBeast\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
index baaa30275ce..a3b2a61702b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
@@ -9,14 +9,13 @@ dashedName: step-70
 
 Adicione um terceiro objeto ao array `locations`. Dê a ele as mesmas propriedades que os outros dois objetos.
 
-Defina `name` como `cave`. Defina `button text` a um array com as strings `Fight slime`, `Fight fanged beast` e `Go to town square`. Defina `button functions` a um array com as variáveis `fightSlime`, `fightBeast` e `goTown`. Defina a propriedade `text` para `You enter the cave. You see some monsters.`.
+Defina `name` como `cave`. Set `button text` to an array with the strings `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`. Set the `"button functions"` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `"You enter the cave. You see some monsters."`.
 
 # --hints--
 
 Você deve ter os três primeiros valores no array `locations`.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 3);
 ```
 
@@ -26,19 +25,19 @@ O terceiro valor de `locations` deve ser um objeto.
 assert.isObject(locations[2]);
 ```
 
-O terceiro objeto `locations` deve ter uma propriedade `name` com o valor de `cave`.
+Your third `locations` object should have a `name` property with the value of `"cave"`.
 
 ```js
 assert.equal(locations[2].name, "cave");
 ```
 
-O terceiro objeto de `locations` deve ter uma propriedade `button text` que é um array.
+Your third `locations` object should have a `"button text"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button text"]);
 ```
 
-A propriedade `button text` deve ter os valores de string `Fight slime`, `Fight fanged beast` e `Go to town square`.
+Your `"button text"` property should have the string values `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[2]["button text"][0], "Fight slime");
@@ -46,13 +45,13 @@ assert.equal(locations[2]["button text"][1], "Fight fanged beast");
 assert.equal(locations[2]["button text"][2], "Go to town square");
 ```
 
-O terceiro objeto de `locations` deve ter uma propriedade `button functions` que é um array.
+Your third `locations` object should have a `"button functions"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button functions"]);
 ```
 
-A propriedade `button functions` deve ter os valores da função `fightSlime`, `fightBeast` e `goTown`.
+Your `"button functions"` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
 
 ```js
 assert.equal(locations[2]["button functions"][0], fightSlime);
@@ -66,7 +65,7 @@ O terceiro objeto de `locations` deve ter uma propriedade `text` que é uma stri
 assert.isString(locations[2].text);
 ```
 
-O terceiro objeto `locations` deve ter uma propriedade `text` com o valor de `You enter the cave. You see some monsters.`.
+Your third `locations` object should have a `text` property with the value of `"You enter the cave. You see some monsters."`.
 
 ```js
 assert.equal(locations[2].text, "You enter the cave. You see some monsters.");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
index 1582de4f223..a6c89d88c5b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
@@ -7,7 +7,7 @@ dashedName: step-71
 
 # --description--
 
-Agora que você tem um objeto `cave`, atualize a função `goCave` para que se chame `update` e passe o novo local `cave`. Lembre-se de que este é o terceiro elemento do array `locations`.
+Now that you have a `"cave"` location object, update your `goCave` function to call `update` and pass that new `"cave"` location. Lembre-se de que este é o terceiro elemento do array `locations`.
 
 Não se esqueça de remover a chamada de `console.log`!
 
@@ -16,19 +16,19 @@ Não se esqueça de remover a chamada de `console.log`!
 Você deve usar a notação de colchete para acessar o terceiro elemento do array `locations`.
 
 ```js
-assert.match(code, /locations\[2\]/);
+assert.match(code, /locations\s*\[\s*2\s*\]/);
 ```
 
 Agora, você deve passar o terceiro elemento do array `locations` para `update`.
 
 ```js
-assert.match(code, /update\(locations\[2\]\)/);
+assert.match(code, /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 Você deve chamar `update` com o terceiro elemento do array `locations` na função `goCave`.
 
 ```js
-assert.match(goCave.toString(), /update\(locations\[2\]\)/);
+assert.match(goCave.toString(), /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 Você não deve ter a instrução `console.log` na função `goCave`.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
index fb277108dad..261604aaaa4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
@@ -7,7 +7,7 @@ dashedName: step-72
 
 # --description--
 
-Agora que os locais `store` e `cave` estão concluídos, você pode codificar as ações que o jogador realiza nesses locais. Dentro da função `buyHealth`, defina `gold` igual a `gold` menos `10`.
+Now that your `"store"` and `"cave"` locations are complete, you can code the actions the player takes at those locations. Dentro da função `buyHealth`, defina `gold` igual a `gold` menos `10`.
 
 Por exemplo, aqui é como você poderia definir `num` igual a `5` menor que `num`: `num = num - 5;`.
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
index 4932e6736a2..56cfd8aedc4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
@@ -19,7 +19,7 @@ const total = document.querySelector('#total');
 total.innerText = value;
 ```
 
-Você pode testar isso clicando no botão "Go to store", seguido do botão "Buy Heath".
+You can test this by clicking your `"Go to store"` button, followed by your `"Buy Health"` button.
 
 **Observação:** sua resposta deve ter apenas duas linhas de código.
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
index d0e9d49863c..3dc8c2140a8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
@@ -7,17 +7,20 @@ dashedName: step-76
 
 # --description--
 
-E se o jogador não tiver ouro o suficiente para comprar vida? Quando você quiser executar o código condicionalmente, você pode usar a instrução `if`. Coloque todo o código na função `buyHealth` dentro de uma instrução `if`. Por exemplo:
+E se o jogador não tiver ouro o suficiente para comprar vida? When you want to run code conditionally, you can use the <dfn>if</dfn> statement.
+
+An `if` statement is used to make decisions in code. The keyword `if` is followed by a condition in parentheses. If the condition is true, the code inside the curly braces `{}` is executed. If the condition is false, the code inside the curly braces is skipped.
+
+Here is an example of an `if` statement:
 
 ```js
-function myFunction() {
-  if ("condition") {
-    console.log("Hello World!");
-  }
+const num = 5;
+if (num >= 3) {
+  console.log("This code will run because num is greater than or equal to 3.");
 }
 ```
 
-For now, the `if` statement condition should be set to the string `condition` as a placeholder.
+Start by placing all of the code in your `buyHealth` function inside an `if` statement. For the `if` statement condition, check if `gold` is greater than or equal to `10`.
 
 # --hints--
 
@@ -27,16 +30,16 @@ A função `buyHealth` deve ter uma instrução `if`.
 assert.match(buyHealth.toString(), /if/);
 ```
 
-A instrução `if` deve ter a string `condition` para a condição.
+Your `if` statement should check if `gold` is greater than or equal to `10`.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)/);
 ```
 
 Todo o código de `buyHealth` deve estar dentro da instrução `if`.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)\s*\{[\s\S]*\}/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)\s*{\s*gold\s*-=\s*10;\s*health\s*\+=\s*10;\s*goldText\.innerText\s*=\s*gold;\s*healthText\.innerText\s*=\s*health;\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
index fae0513ae39..8b4c8831629 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c5db7888af27af23f0dd
-title: Passo 78
+title: Step 77
 challengeType: 0
-dashedName: step-78
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
index 5da005c27be..215d5d342d3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8c65b75664c28a8e59c16
-title: Passo 79
+title: Step 78
 challengeType: 0
-dashedName: step-79
+dashedName: step-78
 ---
 
 # --description--
 
-Dentro da instrução `else`, defina `text.innerText` como `You do not have enough gold to buy health.`.
+Inside the `else` statement, set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 # --hints--
 
-A função `buyHealth` deve definir `text.innerText` como `You do not have enough gold to buy health.`.
+Your `buyHealth` function should set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 ```js
 assert.match(buyHealth.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy health\.\1/);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
index 274992d2e25..f7d3e9a78f4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c6815f5f1a29735efe1b
-title: Passo 80
+title: Step 79
 challengeType: 0
-dashedName: step-80
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
index 75943bcfdff..280d15b5928 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c7322e42962ad53ad204
-title: Passo 81
+title: Step 80
 challengeType: 0
-dashedName: step-81
+dashedName: step-80
 ---
 
 # --description--
 
-Assim como o array `locations`, o array `weapons` vai conter objetos. Adicione quatro objetos ao array `weapons`, cada um com duas propriedades: `name` e `power`. O primeiro deve ter `name` definido como `stick` e `power` definido como `5`. O segundo deve ser `dagger` e `30`. O terceiro, `claw hammer` e `50`. O quarto, `sword` e `100`.
+Assim como o array `locations`, o array `weapons` vai conter objetos. Adicione quatro objetos ao array `weapons`, cada um com duas propriedades: `name` e `power`. The first should have the `name` set to `"stick"` and the `power` set to `5`. The second should be `"dagger"` and `30`. The third, `"claw hammer"` and `50`. The fourth, `"sword"` and `100`.
 
 # --hints--
 
@@ -26,28 +26,28 @@ assert.isObject(weapons[2]);
 assert.isObject(weapons[3]);
 ```
 
-O primeiro objeto de `weapons` deve ter `name` definido como `stick` e `power` definido como `5`.
+Your first `weapons` object should have the `name` set to `"stick"` and the `power` set to `5`.
 
 ```js
 assert.equal(weapons[0].name, 'stick');
 assert.equal(weapons[0].power, 5);
 ```
 
-O segundo objeto de `weapons` deve ter `name` definido como `dagger` e `power` definido como `30`.
+Your second `weapons` object should have the `name` set to `"dagger"` and the `power` set to `30`.
 
 ```js
 assert.equal(weapons[1].name, 'dagger');
 assert.equal(weapons[1].power, 30);
 ```
 
-O terceiro objeto de `weapons` deve ter `name` definido como `claw hammer` e `power` definido como `50`.
+Your third `weapons` object should have the `name` set to `"claw hammer"` and the `power` set to `50`.
 
 ```js
 assert.equal(weapons[2].name, 'claw hammer');
 assert.equal(weapons[2].power, 50);
 ```
 
-O quarto objeto de `weapons` deve ter `name` definido como `sword` e `power` definido como `100`.
+Your fourth `weapons` object should have the `name` set to `"sword"` and the `power` set to `100`.
 
 ```js
 assert.equal(weapons[3].name, 'sword');
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
index 7d366aaf6d5..7f89a172623 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c7a59e72c02bb1c717d2
-title: Passo 82
+title: Step 81
 challengeType: 0
-dashedName: step-82
+dashedName: step-81
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.include(buyWeapon.toString(), 'if');
 A instrução `if` deve verificar se `gold` é maior ou igual a `30`.
 
 ```js
-assert.match(buyWeapon.toString(), /if\s*\(gold\s*>=\s*30\)/);
+assert.match(buyWeapon.toString(), /if\s*\(\s*gold\s*>=\s*30\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
index a9f49cd5db5..b1e1df7d7d6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c89e4272512d44fc1c66
-title: Passo 83
+title: Step 82
 challengeType: 0
-dashedName: step-83
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
index e561497728d..d385deae5d6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c8cee8e5cf2e001789b4
-title: Passo 84
+title: Step 83
 challengeType: 0
-dashedName: step-84
+dashedName: step-83
 ---
 
 # --description--
 
-O valor da variável `currentWeapon` corresponde a um índice no array `weapons`. O jogador começa com um `stick`, já que `currentWeapon` começa em `0` e `weapons[0]` é a arma `stick`.
+O valor da variável `currentWeapon` corresponde a um índice no array `weapons`. The player starts with a `"stick"`, since `currentWeapon` starts at `0` and `weapons[0]` is the `"stick"` weapon.
 
 Na função `buyWeapon`, use a atribuição composta para somar `1` a `currentWeapon` – o usuário está comprando a próxima arma no array `weapons`.
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
index c156676a3c1..332d4b038ab 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ca22d29fe62f3952bdf5
-title: Passo 85
+title: Step 84
 challengeType: 0
-dashedName: step-85
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
index ba800bdd25e..b97e663425d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8cb19bd7f8a304e5427a1
-title: Passo 86
+title: Step 85
 challengeType: 0
-dashedName: step-86
+dashedName: step-85
 ---
 
 # --description--
 
-Agora atualize o elemento `goldText` para que exiba o novo valor de `gold` e atualize o elemento `text` para que exiba `You now have a new weapon.`.
+Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `"You now have a new weapon."`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ Você deve atualizar a propriedade `innerText` do elemento `goldText` para que s
 assert.match(buyWeapon.toString(), /goldText\.innerText\s*=\s*gold/);
 ```
 
-Você deve atualizar a propriedade `innerText` do elemento `text` para que seja `You now have a new weapon.`.
+You should update the `innerText` property of the `text` element to be `"You now have a new weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a new weapon\.\1/);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
index 092d6a4bd51..d3e4eb3f2c9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cbd1e3595431d5a2b3f1
-title: Passo 87
+title: Step 86
 challengeType: 0
-dashedName: step-87
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
index 6374f7d8064..79d73ee08e7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cce1b0c32c33017cf2e9
-title: Passo 88
+title: Step 87
 challengeType: 0
-dashedName: step-88
+dashedName: step-87
 ---
 
 # --description--
@@ -22,7 +22,7 @@ let value = array[index];
 Você deve atualizar `newWeapon` para que tenha o valor de `weapons[currentWeapon]`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
index ba8e1ea5597..13341cc2f37 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ce1dfc990134162b3bd9
-title: Passo 89
+title: Step 88
 challengeType: 0
-dashedName: step-89
+dashedName: step-88
 ---
 
 # --description--
@@ -14,7 +14,7 @@ dashedName: step-89
 Você deve atualizar `newWeapon` para que tenha o valor de `weapons[currentWeapon].name`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]\.name;/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
index 5d047b77eb6..39b25405fc2 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8ce73d0dce43468f6689c
-title: Passo 90
+title: Step 89
 challengeType: 0
-dashedName: step-90
+dashedName: step-89
 ---
 
 # --description--
 
-Você pode inserir variáveis em uma string com o <dfn>operador de concatenação</dfn> `+`. Atualize o string `You now have a new weapon.` para dizer `You now have a` e o nome da nova arma. Lembre-se de terminar a frase com um ponto.
+Você pode inserir variáveis em uma string com o <dfn>operador de concatenação</dfn> `+`. Update the `"You now have a new weapon."` string to say `"You now have a "` and the name of the new weapon. Lembre-se de terminar a frase com um ponto.
 
-Aqui está um exemplo que cria a string `Hello, our name is freeCodeCamp.`:
+Here is an example that creates the string `"Hello, our name is freeCodeCamp."`:
 
 ```js
 const ourName = "freeCodeCamp";
@@ -18,7 +18,7 @@ const ourStr = "Hello, our name is " + ourName + ".";
 
 # --hints--
 
-Você deve atualizar a atribuição `text.innerText` para começar com a string `You now have a`.
+You should update the `text.innerText` assignment to start with the string `"You now have a "`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a \1/);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
index 608a7e1613f..dd237107526 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cf22272d6d35af80d4ac
-title: Passo 91
+title: Step 90
 challengeType: 0
-dashedName: step-91
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
index 1d45a0ed174..f238bbb3eb6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d0337d7c67377a4a76c6
-title: Passo 92
+title: Step 91
 challengeType: 0
-dashedName: step-92
+dashedName: step-91
 ---
 
 # --description--
 
 Até agora, toda vez que `text.innerText` era atualizado, o texto antigo era apagado. Desta vez, use o operador `+=` para adicionar texto ao final do `text.innerText`.
 
-Adicione a string `In your inventory you have:` – inclua os espaços no início e no final.
+Add the string `" In your inventory you have: "` - include the spaces at the beginning and the end.
 
 # --hints--
 
@@ -26,7 +26,7 @@ Você deve usar o operador `+=` para adicionar `text.innerText`.
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*/)
 ```
 
-Você deve adicionar a string `In your inventory you have:` no final do `text.innerText`. Cuidado com os espaços!
+You should add the string `" In your inventory you have: "` to the end of `text.innerText`. Cuidado com os espaços!
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
index d623e229ed4..a62503bd382 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d08668fa8b38732486e9
-title: Passo 93
+title: Step 92
 challengeType: 0
-dashedName: step-93
+dashedName: step-92
 ---
 
 # --description--
@@ -11,7 +11,7 @@ No final da segunda string `text.innerText` que você acabou de adicionar, use o
 
 # --hints--
 
-Você não deve mudar a string `In your inventory you have:`.
+You should not change the `" In your inventory you have: "` string.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
index 37824082716..172fb8a53b3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d0c4f12c2239b6618582
-title: Passo 94
+title: Step 93
 challengeType: 0
-dashedName: step-94
+dashedName: step-93
 ---
 
 # --description--
 
-Adicione uma instrução `else` à função `buyWeapon`. Nessa instrução, defina `text.innerText` como `You do not have enough gold to buy a weapon.`.
+Adicione uma instrução `else` à função `buyWeapon`. In that statement, set `text.innerText` to equal `"You do not have enough gold to buy a weapon."`.
 
 # --hints--
 
@@ -24,13 +24,13 @@ const split = buyWeapon.toString().split(/\s|\n/);
 assert.isAbove(split.indexOf('else'), split.indexOf('if'));
 ```
 
-Você deve definir `text.innerText` como `You do not have enough gold to buy a weapon.`.
+You should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy a weapon.\1/);
 ```
 
-A instrução `else` deve definir `text.innerText` como `You do not have enough gold to buy a weapon.`.
+Your `else` statement should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 gold = 20;
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
index 43977e618de..1e0e8423968 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d0fdf2dad83a92883a80
-title: Passo 95
+title: Step 94
 challengeType: 0
-dashedName: step-95
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
index b34b58adc8f..ba562aedab5 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d143f2a58e3b6d6e9c33
-title: Passo 96
+title: Step 95
 challengeType: 0
-dashedName: step-96
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
index 00640f0bb64..d7fa4312961 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d1c72e8bb13c2074d93c
-title: Passo 97
+title: Step 96
 challengeType: 0
-dashedName: step-97
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
index e7e16b63bb0..607040acc88 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d2146a3e853d0a6e28ca
-title: Passo 98
+title: Step 97
 challengeType: 0
-dashedName: step-98
+dashedName: step-97
 ---
 
 # --description--
 
-Adicione uma instrução `else` à instrução `if` externa. Dentro desta nova instrução `else`, defina `text.innerText` como `You already have the most powerful weapon!`.
+Adicione uma instrução `else` à instrução `if` externa. Inside this new `else` statement, set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 # --hints--
 
@@ -18,13 +18,13 @@ const matches = buyWeapon.toString().match(/else/g);
 assert.equal(matches.length, 2);
 ```
 
-Você deve definir `text.innerText` como `You already have the most powerful weapon!`.
+You should set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 ```js
 assert.match(buyWeapon.toString(), /('|")You already have the most powerful weapon!\1/);
 ```
 
-Você deve modificar seu `text.innerText` para `You already have the most powerful weapon!` dentro da instrução `else` externa.
+You should modify your `text.innerText` to `"You already have the most powerful weapon!"` within your outer `else` statement.
 
 ```js
 currentWeapon = 5;
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
index 395b95c4842..de9a7355bd2 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d24c97461b3ddb9397c8
-title: Passo 99
+title: Step 98
 challengeType: 0
-dashedName: step-99
+dashedName: step-98
 ---
 
 # --description--
 
 Quando um jogador tiver a arma mais poderosa, você pode dar a ele a habilidade de vender as outras armas.
 
-Na instrução `else` externa, defina `button2.innerText` como `Sell weapon for 15 gold`. Também defina `button2.onclick` para o nome de função `sellWeapon`.
+In the outer `else` statement, set `button2.innerText` to `"Sell weapon for 15 gold"`. Também defina `button2.onclick` para o nome de função `sellWeapon`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ Você deve definir o valor de `button2.innerText`.
 assert.match(buyWeapon.toString(), /button2\.innerText/);
 ```
 
-Você deve definir o valor de `button2.innerText` como `Sell weapon for 15 gold`.
+You should set the value of `button2.innerText` to `"Sell weapon for 15 gold"`.
 
 ```js
 assert.match(buyWeapon.toString(), /button2\.innerText\s*=\s*('|")Sell weapon for 15 gold\1;/);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
index 707cd433f5f..c5911459f51 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d2e2a073be3edb46116f
-title: Passo 100
+title: Step 99
 challengeType: 0
-dashedName: step-100
+dashedName: step-99
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.isFunction(sellWeapon);
 `sellWeapon` deve ser uma função vazia.
 
 ```js
-assert.match(sellWeapon.toString(), /sellWeapon\(\)\s*\{\s*\}/);
+assert.match(sellWeapon.toString(), /sellWeapon\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
index 3b8b54d0aab..f653edf48e4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d31ebbc10e3fe1b28e03
-title: Passo 101
+title: Step 100
 challengeType: 0
-dashedName: step-101
+dashedName: step-100
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(sellWeapon.toString(), /if/);
 A instrução `if` deve verificar se `inventory.length` é maior que `1`.
 
 ```js
-assert.match(sellWeapon.toString(), /if\s*\(inventory\.length\s*>\s*1\)/);
+assert.match(sellWeapon.toString(), /if\s*\(\s*inventory\.length\s*>\s*1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
index 70109de331c..e453e92bf5b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d35660db4040ba292193
-title: Passo 102
+title: Step 101
 challengeType: 0
-dashedName: step-102
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
index 7eae82210a9..c39ae21c976 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8d382cd075f4169223e14
-title: Passo 103
+title: Step 102
 challengeType: 0
-dashedName: step-103
+dashedName: step-102
 ---
 
 # --description--
 
-The next step is to create a variable called `currentWeapon`.
+O próximo passo é criar uma variável chamada `currentWeapon`.
 
-Observe que você já tem uma variável `currentWeapon` em outro lugar no código. Since this new `currentWeapon` variable will be inside an `if` statement, it will be scoped only to that block of code.
+Observe que você já tem uma variável `currentWeapon` em outro lugar no código. Como essa nova variável `currentWeapon` estará dentro de uma instrução `if`, o escopo será apenas para esse bloco de código.
 
-Scope is the term used to describe where a variable can be accessed. If a variable is declared inside a block of code, it is only accessible to the code inside that block. This is called block scope.
+Escopo é o termo usado para descrever onde uma variável pode ser acessada. Se uma variável é declarada dentro de um bloco de código, ela só é acessível ao código dentro desse bloco. Isto é chamado de escopo de bloco.
 
 ```js
 let num = 1;
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
index 86ca0e90a31..7e2f023fda7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d539dc11cb42b5dd7ec8
-title: Passo 104
+title: Step 103
 challengeType: 0
-dashedName: step-104
+dashedName: step-103
 ---
 
 # --description--
@@ -21,19 +21,19 @@ Use the `shift()` method to take the first element from the `inventory` array an
 A função `sellWeapon` deve usar o método `shift()`.
 
 ```js
-assert.match(sellWeapon.toString(), /shift\(\)/);
+assert.match(sellWeapon.toString(), /shift\(\s*\)/);
 ```
 
 Você deve usar o método `shift()` no array `inventory`.
 
 ```js
-assert.match(sellWeapon.toString(), /inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /inventory\.shift\(\s*\)/);
 ```
 
 Você deve atribuir o valor de `inventory.shift()` à variável `currentWeapon`.
 
 ```js
-assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
index 8d6c50f52b7..c917c2ba659 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d61ddfe35744369365b7
-title: Passo 105
+title: Step 104
 challengeType: 0
-dashedName: step-105
+dashedName: step-104
 ---
 
 # --description--
 
-Após o `currentWeapon`, use o operador de concatenação para definir `text.innerText` com a string `You sold a`, depois a `currentWeapon` e, por fim, a string `.`.
+After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `"You sold a "`, then `currentWeapon`, then the string `"."`.
 
 # --hints--
 
@@ -17,19 +17,19 @@ Você deve usar o operador de atribuição com `text.innerText`.
 assert.match(sellWeapon.toString(), /text\.innerText\s*=/);
 ```
 
-Você deve adicionar `You sold a` a `text.innerText`. O espaçamento é importante.
+You should add `"You sold a "` to `text.innerText`. O espaçamento é importante.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1/);
 ```
 
-Você deve adicionar o valor de `currentWeapon` à string `You sold a`. Use o operador de concatenação para fazer isso na mesma linha.
+You should add the value of `currentWeapon` to the `"You sold a "` string. Use o operador de concatenação para fazer isso na mesma linha.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a\s\1\s*\+\s*\_currentWeapon/);
 ```
 
-Você deve adicionar a string `.` ao valor de `currentWeapon`. Use o operador de concatenação para fazer isso na mesma linha.
+You should add the string `"."` to the value of `currentWeapon`. Use o operador de concatenação para fazer isso na mesma linha.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1\s*\+\s*\_currentWeapon\s+\+\s+('|")\.\2/);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
index c828ef83f9d..70015975c76 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d6c7001ebc45350e3d16
-title: Passo 106
+title: Step 105
 challengeType: 0
-dashedName: step-106
+dashedName: step-105
 ---
 
 # --description--
 
-Agora use o operador `+=` para adicionar a string `In your inventory you have:` e o conteúdo de `inventory` a `text.innerText`. Certifique-se de incluir o espaço no início e no final da string `In your inventory you have:`.
+Now use the `+=` operator to add the string `" In your inventory you have: "` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `" In your inventory you have: "` string.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const matches = sellWeapon.toString().match(/text\.innerText\s*\+=/g);
 assert.equal(matches.length, 1);
 ```
 
-Você deve adicionar a string `In your inventory you have:` à segunda linha de `text.innerText`. O espaçamento é importante.
+You should add the string `" In your inventory you have: "` to the second `text.innerText` line. O espaçamento é importante.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*\+=\s*('|") In your inventory you have: \1/);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
index 1d80fd59bb4..3fbc8e0de1e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d7b8ab568b4649998954
-title: Passo 107
+title: Step 106
 challengeType: 0
-dashedName: step-107
+dashedName: step-106
 ---
 
 # --description--
 
-Use uma instrução `else` para executar quando o tamanho do `inventory` não for maior que um. Defina `text.innerText` para dizer `Don't sell your only weapon!`.
+Use uma instrução `else` para executar quando o tamanho do `inventory` não for maior que um. Set the `text.innerText` to say `"Don't sell your only weapon!"`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ A função `sellWeapon` deve ter uma instrução `else`.
 assert.match(sellWeapon.toString(), /else/);
 ```
 
-Você deve definir `text.innerText` com `Don't sell your only weapon!`.
+You should set `text.innerText` to `"Don't sell your only weapon!"`.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")Don't sell your only weapon!\1/);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
index de379a1374c..74f90230cb9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d81f539f004776dd9b1e
-title: Passo 108
+title: Step 107
 challengeType: 0
-dashedName: step-108
+dashedName: step-107
 ---
 
 # --description--
 
 Agora, você pode iniciar o código para lutar contra monstros. Para manter o código organizado, a função `fightDragon` foi movida para ficar perto das outras funções `fight`.
 
-Embaixo do array `weapons`, defina uma variável `monsters` e atribua-a a um array. Defina esse array como tendo três objetos, cada um com as propriedades `name`, `level` e `health`. Os valores do primeiro objeto devem ser `slime`, `2` e `15`, na ordem. O segundo deve ser `fanged beast`, `8` e `60`. O terceiro deve ser `dragon`, `20` e `300`.
+Embaixo do array `weapons`, defina uma variável `monsters` e atribua-a a um array. Defina esse array como tendo três objetos, cada um com as propriedades `name`, `level` e `health`. The first object's values should be `"slime"`, `2`, and `15`, in order. The second should be `"fanged beast"`, `8`, and `60`. The third should be `"dragon"`, `20`, and `300`.
 
 # --hints--
 
@@ -37,7 +37,7 @@ O array `monsters` deve ter 3 objetos.
 assert(monsters.every(val => typeof val === "object"));
 ```
 
-O primeiro valor no array `monsters` deve ser um objeto com uma propriedade `name` definida como `slime`.
+The first value in your `monsters` array should be an object with a `name` property set to `"slime"`.
 
 ```js
 assert.equal(monsters[0].name, "slime");
@@ -55,7 +55,7 @@ O primeiro valor no array `monsters` deve ser um objeto com uma propriedade `hea
 assert.equal(monsters[0].health, 15);
 ```
 
-O segundo valor no array `monsters` deve ser um objeto com uma propriedade `name` definida como `fanged beast`.
+The second value in your `monsters` array should be an object with a `name` property set to `"fanged beast"`.
 
 ```js
 assert.equal(monsters[1].name, "fanged beast");
@@ -73,7 +73,7 @@ O segundo valor no array `monsters` deve ser um objeto com uma propriedade `heal
 assert.equal(monsters[1].health, 60);
 ```
 
-O terceiro valor no array `monsters` deve ser um objeto com uma propriedade `name` definida como `dragon`.
+The third value in your `monsters` array should be an object with a `name` property set to `"dragon"`.
 
 ```js
 assert.equal(monsters[2].name, "dragon");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
index ea77d7f30f0..735b471b59b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd468debb449b4454086
-title: Passo 109
+title: Step 108
 challengeType: 0
-dashedName: step-109
+dashedName: step-108
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
index 5315f1d6099..8241d6af73b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd9cdb16324b04cfd958
-title: Passo 110
+title: Step 109
 challengeType: 0
-dashedName: step-110
+dashedName: step-109
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.notMatch(fightSlime.toString(), /let|const/);
 Você deve chamar a função `goFight`.
 
 ```js
-assert.match(fightSlime.toString(), /goFight\(\);/);
+assert.match(fightSlime.toString(), /goFight\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
index 541b3e7423c..0e427bc07fc 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8dfcf7fb1044d2f478fd1
-title: Passo 111
+title: Step 110
 challengeType: 0
-dashedName: step-111
+dashedName: step-110
 ---
 
 # --description--
 
-Seguindo o mesmo padrão, use esse código nas funções `fightBeast` e `fightDragon`. Lembre-se de que `beast` está no índice `1` e `dragon` está no índice `2`. Além disso, remova a chamada a `console.log` da função `fightDragon`.
+Following the same pattern as the `fightSlime` function, use that code in the `fightBeast` and `fightDragon` functions. Lembre-se de que `beast` está no índice `1` e `dragon` está no índice `2`. Além disso, remova a chamada a `console.log` da função `fightDragon`.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
index 44d45309e65..2ae8f03d892 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e0d1d0110b4ec421489f
-title: Passo 112
+title: Step 111
 challengeType: 0
-dashedName: step-112
+dashedName: step-111
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
index 2291ae7cbb9..9d47fb6c245 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
@@ -1,20 +1,19 @@
 ---
 id: 62a8e142f7f0bd4fed898de3
-title: Passo 113
+title: Step 112
 challengeType: 0
-dashedName: step-113
+dashedName: step-112
 ---
 
 # --description--
 
-Adicione um novo objeto no final do array `locations`, seguindo as mesmas propriedades do resto dos objetos. Defina `name` como `fight`, `button text` como um array com `Attack`, `Dodge` e `Run`, `button functions` como um array com `attack`, `dodge` e `goTown`, e `text` como `You are fighting a monster.`.
+Adicione um novo objeto no final do array `locations`, seguindo as mesmas propriedades do resto dos objetos. Set `name` to `"fight"`, `"button text"` to an array with `"Attack"`, `"Dodge"`, and `"Run"`, `"button functions"` to an array with `attack`, `dodge`, and `goTown`, and `text` to `"You are fighting a monster."`.
 
 # --hints--
 
 O array `locations` deve conter 4 valores.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 4);
 ```
 
@@ -24,25 +23,25 @@ O novo valor deve ser um objeto.
 assert.isObject(locations[3]);
 ```
 
-O novo objeto deve ter uma propriedade `name` definida como `fight`.
+Your new object should have a `name` property set to `"fight"`.
 
 ```js
 assert.equal(locations[3].name, "fight");
 ```
 
-O novo objeto deve ter uma propriedade `button text` definida como um array com as strings `Attack`, `Dodge` e `Run`.
+Your new object should have a `"button text"` property set to an array with the strings `"Attack"`, `"Dodge"`, and `"Run"`.
 
 ```js
 assert.deepEqual(locations[3]["button text"], ["Attack", "Dodge", "Run"]);
 ```
 
-O novo objeto deve ter uma propriedade `button functions` definida como um array com as variáveis `attack`, `dodge` e `goTown`.
+Your new object should have a `"button functions"` property set to an array with the variables `attack`, `dodge`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[3]["button functions"], [attack, dodge, goTown]);
 ```
 
-O novo objeto deve ter uma propriedade `text` definida como `You are fighting a monster.`.
+Your new object should have a `text` property set to `"You are fighting a monster."`.
 
 ```js
 assert.equal(locations[3].text, "You are fighting a monster.");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
index 900cf195814..aca9b566c47 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e1dc897df55108bcb5e8
-title: Passo 114
+title: Step 113
 challengeType: 0
-dashedName: step-114
+dashedName: step-113
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(goFight.toString(), /update/);
 Agora deve passar o quarto objeto no seu array `locations` para a chamada de `update`.
 
 ```js
-assert.match(goFight.toString(), /update\(locations\[3\]\)/);
+assert.match(goFight.toString(), /update\(\s*locations\s*\[\s*3\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
index 84b8b9a25be..1e4dd308065 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e21398ad61520edb724f
-title: Passo 115
+title: Step 114
 challengeType: 0
-dashedName: step-115
+dashedName: step-114
 ---
 
 # --description--
@@ -14,13 +14,13 @@ Embaixo da chamada de `update`, defina `monsterHealth` como a saúde do monstro
 Você deve usar notação de colchete para acessar o array `monsters` do índice de `fighting`.
 
 ```js
-assert.match(goFight.toString(), /monsters\[fighting\]/);
+assert.match(goFight.toString(), /monsters\s*\[\s*fighting\s*\]/);
 ```
 
 Você deve atribuir o valor de `monsters[fighting]` à variável `monsterHealth`.
 
 ```js
-assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\[fighting\](\.health|\[('|")health\2\])/);
+assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\s*\[\s*fighting\s*\]\s*(\.health|\[\s*('|")health\2\s*\])/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
index 53ad09b8048..3a4aa626bda 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
@@ -1,18 +1,25 @@
 ---
 id: 62a8e24c673b075317cc0b09
-title: Passo 116
+title: Step 115
 challengeType: 0
-dashedName: step-116
+dashedName: step-115
 ---
 
 # --description--
 
-O elemento HTML que mostra as estatísticas do monstro foi ocultado com CSS. Exiba o elemento `monsterStats` atualizando a propriedade `display` da propriedade `style` com `block`. Por exemplo, atualizar a propriedade `first` da propriedade `name` de `user` ficaria assim:
+By default, the HTML element that shows the monster's stats has been hidden with CSS. When the player clicks the "Fight dragon" button, the monster's stats should be displayed. You can accomplish this by using the <dfn>style</dfn> and <dfn>display</dfn> properties on the `monsterStats` element.
+
+The `style` property is used to access the inline style of an element and the `display` property is used to set the visibility of an element.
+
+Here is an example of how to update the display for a paragraph element:
 
 ```js
-user.name.first = "Naomi";
+const paragraph = document.querySelector('p');
+paragraph.style.display = 'block';
 ```
 
+Exiba o elemento `monsterStats` atualizando a propriedade `display` da propriedade `style` com `block`.
+
 # --hints--
 
 Você deve usar a notação do ponto para acessar a propriedade `style` de `monsterStats`.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
index 35b4cdd30fd..3e151ceb621 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e271f8e3d1541f9624ad
-title: Passo 117
+title: Step 116
 challengeType: 0
-dashedName: step-117
+dashedName: step-116
 ---
 
 # --description--
 
-Agora, defina a propriedade `innerText` de `monsterName` para ser a propriedade `name` do monstro atual. Faça o mesmo para `monsterHealthText` e a propriedade `health`.
+Now, you will need to update the text for the current monster's name and health.
+
+Start by assigning `monsters[fighting].name` to the `innerText` property of `monsterName`. Then, assign `monsterHealth` to the `innerText` property of `monsterHealthText`.
 
 # --hints--
 
@@ -17,22 +19,22 @@ Você deve usar notação do ponto para acessar a propriedade `innerText` de `mo
 assert.match(goFight.toString(), /monsterName\.innerText/);
 ```
 
-Você deve definir a propriedade `innerText` de `monsterName` para que seja o valor de `name` do monstro atual. Lembre-se de que você pode obter o monstro atual com `monsters[fighting]`.
+You should assign `monsters[fighting].name` to `monsterName.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\[fighting\]\.name/);
+assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
-Você deve usar notação do ponto para acessar a propriedade `innerText` de `monsterHealthText`.
+You should use dot notation to access the `innerText` property of `monsterHealthText`.
 
 ```js
 assert.match(goFight.toString(), /monsterHealthText\.innerText/);
 ```
 
-Você deve definir a propriedade `innerText` de `monsterHealthText` para que seja o valor de `health` do monstro atual. You can get the current monster with `monsters[fighting]` or you can access this value using the `monsterHealth` variable that you previously assigned.
+You should assign `monsterHealth` to `monsterHealthText.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\[fighting\]\.health/);
+assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.health/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
index 95757a5f89e..3326e7d0d55 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e35675c18c56354c08cf
-title: Passo 118
+title: Step 117
 challengeType: 0
-dashedName: step-118
+dashedName: step-117
 ---
 
 # --description--
 
-Agora, você pode construir a função `attack`. First, update the `text` message to say `The <monster name> attacks.`, replacing `<monster name>` with the name of the monster. Lembre-se de que você pode usar o operador de concatenação para isso.
+Agora, você pode construir a função `attack`. First, update the `text` message to say `"The <monster name> attacks."`, replacing `<monster name>` with the name of the monster. Lembre-se de que você pode usar o operador de concatenação para isso.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1/);
 Você deve usar o operador de concatenação para adicionar o valor de `monsters[fighting].name` à string `The`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 Você deve usar o operador de concatenação para adicionar a string `attacks.` à string `monsters[fighting].name`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name\s*\+\s*('|") attacks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name\s*\+\s*('|") attacks\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
index 2b4e9fdcdf2..45cfb68dbc5 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e41e2f190c58404dd46e
-title: Passo 119
+title: Step 118
 challengeType: 0
-dashedName: step-119
+dashedName: step-118
 ---
 
 # --description--
 
-On a new line, add the string `You attack it with your <weapon>.` to the `text` value, replacing `<weapon>` with the player's current weapon.
+On a new line, use the addition assignment operator(`+=`), to add the string `" You attack it with your <weapon>."` to the `text` value, replacing `<weapon>` with the player's current weapon. Além disso, lembre-se de que esta linha de texto começa com um espaço para que seja exibida corretamente.
 
 # --hints--
 
@@ -24,7 +24,7 @@ Você deve usar a atribuição composta com `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=/);
 ```
 
-Você deve adicionar a string `You attack it with your` ao valor de `text.innerText`. Lembre-se de que o espaçamento é importante.
+You should add the string `" You attack it with your "` to the `text.innerText` value. Lembre-se de que o espaçamento é importante.
 
 ```js
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1/);
@@ -33,13 +33,13 @@ assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it wit
 Você deve usar o operador de concatenação para adicionar a arma atual à string. Você pode obter a arma atual com `weapons[currentWeapon].name`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name/);
 ```
 
-Você deve usar o operador de concatenação para finalizar a string com `.`.
+You should use the concatenation operator to end your string with `"."`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name\s*\+\s*('|")\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*\+\s*('|")\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
index 6a6a44ac2d9..1347ecec12a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e45cc600c3591cee671a
-title: Passo 120
+title: Step 119
 challengeType: 0
-dashedName: step-120
+dashedName: step-119
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(attack.toString(), /health\s*-=/);
 Você deve subtrair o nível atual do monstro da `health` do personagem.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*monsters\[fighting\]\.level/);
+assert.match(attack.toString(), /health\s*-=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
index 87d871be714..ac76865ed0a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
@@ -1,38 +1,40 @@
 ---
 id: 62a8e49f4df7af5ae2d7a616
-title: Passo 121
+title: Step 120
 challengeType: 0
-dashedName: step-121
+dashedName: step-120
 ---
 
 # --description--
 
-Defina `monsterHealth` como `monsterHealth` menos o poder da arma atual do jogador. Lembre-se de que você tem a variável `currentWeapon` e a propriedade `power`.
+Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon.
+
+Remember that you can access the power of the player's current weapon using `weapons[currentWeapon].power`.
 
 # --hints--
 
-Você deve usar atribuição composta para modificar a variável `monsterHealth`.
+You should use compound assignment to modify the `monsterHealth` variable.
 
 ```js
 assert.match(attack.toString(), /monsterHealth\s*-=/);
 ```
 
-Você deve usar notação de colchete com `currentWeapon` para acessar `weapons`.
+You should use bracket notation with `currentWeapon` to access `weapons`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
-Você deve usar notação de ponto para acessar a propriedade `power` de `weapons[currentWeapon]`.
+You should use dot notation to access the `power` property of `weapons[currentWeapon]`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
-Você deve subtrair `power` da arma atual de `monsterHealth`.
+You should subtract the `power` of the current weapon from `monsterHealth`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
index 706d8f45e12..0e45377aab3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8e4dc6a60f85bf256a0cb
-title: Passo 122
+title: Step 121
 challengeType: 0
-dashedName: step-122
+dashedName: step-121
 ---
 
 # --description--
 
 The `Math` object in JavaScript contains static properties and methods for mathematical constants and functions. One of those is `Math.random()`, which generates a random number from `0` (inclusive) to `1` (exclusive). Outra é `Math.floor()`, que arredonda um número qualquer para o inteiro mais próximo abaixo dele.
 
-Ao usá-las, você pode gerar um número aleatório dentro de um intervalo. Por exemplo, isso gera um número aleatório entre 1 e 5: `Math.floor(Math.random() * 5) + 1;`.
+Ao usá-las, você pode gerar um número aleatório dentro de um intervalo. For example, this generates a random number between `1` and `5`: `Math.floor(Math.random() * 5) + 1;`.
 
 Following this pattern, use the addition operator (`+`) to add a random number between `1` and the value of `xp` to your `monsterHealth -= weapons[currentWeapon].power`.
 
@@ -24,7 +24,7 @@ assert.lengthOf(attack.toString().match(/monsterHealth/g), 1);
 Você deve adicionar ao valor de `weapons[currentWeapon].power`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+/);
 ```
 
 Você deve usar `Math.floor()`.
@@ -42,25 +42,25 @@ assert.match(attack.toString(), /Math\.random/);
 Você deve multiplicar `Math.random()` pelo valor de `xp`.
 
 ```js
-assert.match(attack.toString(), /Math\.random\(\)\s*\*\s*xp/);
+assert.match(attack.toString(), /Math\.random\(\s*\)\s*\*\s*xp/);
 ```
 
 Você deve usar `Math.floor()` para arredondar o resultado de `Math.random() * xp` para baixo.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\)\s*\*\s*xp\s*.*\)/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*.*\)/);
 ```
 
 Você deve adicionar `1` ao resultado de `Math.floor()`.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 Você deve adicionar o resultado de `Math.floor(Math.random() * xp) + 1` ao resultado de `weapons[currentWeapon].power`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
index 9a0581b76bc..321651343a4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ed36d7a7915dfa444ba2
-title: Passo 123
+title: Step 122
 challengeType: 0
-dashedName: step-123
+dashedName: step-122
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
index 812af98988f..ee21247aefb 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8edd05e27cc668051686f
-title: Passo 124
+title: Step 123
 challengeType: 0
-dashedName: step-124
+dashedName: step-123
 ---
 
 # --description--
@@ -20,13 +20,13 @@ assert.match(attack.toString(), /if/);
 A instrução `if` deve verificar se `health` é menor ou igual a `0`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(health\s*<=\s*0\)/);
+assert.match(attack.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 ```
 
 A instrução `if` deve chamar a função `lose`.
 
 ```js
-assert.match(attack.toString(), /lose\(\)/);
+assert.match(attack.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
index 088ebe3883f..e79cd5a1c63 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee154c8946678775c4a4
-title: Passo 125
+title: Step 124
 challengeType: 0
-dashedName: step-125
+dashedName: step-124
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
index ab8adcecace..ee599573eea 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee71f018e968a056d369
-title: Passo 126
+title: Step 125
 challengeType: 0
-dashedName: step-126
+dashedName: step-125
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(code, /function\s+defeatMonster/);
 `defeatMonster` deve ser uma função vazia.
 
 ```js
-assert.match(defeatMonster.toString(), /defeatMonster\s*\(\)\s*\{\s*\}/);
+assert.match(defeatMonster.toString(), /defeatMonster\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 Você deve usar a palavra-chave `function` para declarar a variável `lose`.
@@ -32,7 +32,7 @@ assert.match(code, /function\s+lose/);
 `lose` deve ser uma função vazia.
 
 ```js
-assert.match(lose.toString(), /lose\s*\(\)\s*\{\s*\}/);
+assert.match(lose.toString(), /lose\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
index 8e6738e1db2..6de4a9aa0e3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8eec45f77bc69e8775294
-title: Passo 127
+title: Step 126
 challengeType: 0
-dashedName: step-127
+dashedName: step-126
 ---
 
 # --description--
 
-Inside the `dodge` function, set `text.innerText` equal to the string `You dodge the attack from the <monster>`. Replace `<monster>` with the name of the monster, using the `name` property.
+Inside the `dodge` function, set `text.innerText` equal to the string `"You dodge the attack from the <monster>"`. Replace `<monster>` with the name of the monster, using the `name` property.
 
 # --hints--
 
-Você deve atribuir a string `You dodge the attack from the` à propriedade `text.innerText`. Lembre-se de que o espaçamento é importante.
+You should assign the string `"You dodge the attack from the "` to the `text.innerText` property. Lembre-se de que o espaçamento é importante.
 
 ```js
 assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1/);
@@ -20,7 +20,7 @@ assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack
 Você deve usar o operador de concatenação para adicionar o nome do monstro ao final da string. Você pode obter isso com `monsters[fighting].name`.
 
 ```js
-assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
index c3ab007a090..3874ae14341 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8eefe2e68b66ac563816b
-title: Passo 128
+title: Step 127
 challengeType: 0
-dashedName: step-128
+dashedName: step-127
 ---
 
 # --description--
 
-Na função `defeatMonster`, defina `gold` como `gold` mais o nível do monstro vezes `6.7`. Você pode obter o nível do monstro com a propriedade `level`.
+Na função `defeatMonster`, defina `gold` como `gold` mais o nível do monstro vezes `6.7`. Remember you can get the monster's level by using `monsters[fighting].level`.
 
 Aqui está um exemplo de como definir `num` com `num` mais `5` * `8`: `num += 5 * 8`. Use `Math.floor()` para arredondar o resultado para baixo.
 
@@ -22,13 +22,13 @@ assert.match(defeatMonster.toString(), /gold\s*\+=/);
 Você deve usar `Math.floor()` para arredondar o resultado do nível do monstro vezes `6.7`.
 
 ```js
-assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\))/);
 ```
 
-You should add the result of `Math.floor(monsters[fighting].level * 6.7)` to `gold`.
+Você deve adicionar o resultado de `Math.floor(monsters[fighting].level * 6.7)` a `gold`.
 
 ```js
-assert.match(defeatMonster.toString(), /gold\s*\+=\s*(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /gold\s*\+=\s*((Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)))/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
index 934f771b793..54cee82e726 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef6a52292f6bdca4f6f8
-title: Passo 129
+title: Step 128
 challengeType: 0
-dashedName: step-129
+dashedName: step-128
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /xp\s*\+=/);
 Você deve adicionar o nível do monstro ao `xp`.
 
 ```js
-assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\[fighting\]\.level/);
+assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
index 8c9250ef098..ee9f485c96a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef8f0c76a46cd221a68c
-title: Passo 130
+title: Step 129
 challengeType: 0
-dashedName: step-130
+dashedName: step-129
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
index b5bd3d637bc..c2bdfa1fec9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8efb0e3ce826db8daf80f
-title: Passo 131
+title: Step 130
 challengeType: 0
-dashedName: step-131
+dashedName: step-130
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /update/);
 Você deve passar `locations[4]` como argumento.
 
 ```js
-assert.match(defeatMonster.toString(), /update\(locations\[4\]\)/);
+assert.match(defeatMonster.toString(), /update\(\s*locations\s*\[\s*4\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
index 3c4d199eca2..11a43ce4b7e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8eff21c0b0f6ebe5b8e38
-title: Passo 132
+title: Step 131
 challengeType: 0
-dashedName: step-132
+dashedName: step-131
 ---
 
 # --description--
 
 O array `locations` não tem um quinto elemento. Portanto, `locations[4]` não funciona.
 
-Adicione um novo objeto ao final do array `locations`, seguindo a mesma estrutura do resto dos objetos. Defina `name` como `kill monster`, defina `button text` como um array com três strings `Go to town square`, defina `button functions` como um array com três variáveis `goTown` e defina `text` como `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Adicione um novo objeto ao final do array `locations`, seguindo a mesma estrutura do resto dos objetos. Set `name` to `"kill monster"`, set `"button text"` to an array with three `"Go to town square"` strings, set `"button functions"` to an array with three `goTown` variables, and set `text` to `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 # --hints--
 
@@ -25,25 +25,25 @@ O quinto valor de `locations` deve ser um objeto.
 assert.isObject(locations[4]);
 ```
 
-O quinto valor de `locations` deve ter uma propriedade `name` com o valor `kill monster`.
+Your fifth `locations` value should have a `name` property with the value `"kill monster"`.
 
 ```js
 assert.equal(locations[4].name, 'kill monster');
 ```
 
-O quinto valor de `locations` deve ter um array `button text` com três strings `Go to town square`.
+Your fifth `locations` value should have a `"button text"` array with three `"Go to town square"` strings.
 
 ```js
 assert.deepEqual(locations[4]["button text"], ['Go to town square', 'Go to town square', 'Go to town square']);
 ```
 
-O quinto valor de `locations` deve ter um array `button functions` com três variáveis `goTown`.
+Your fifth `locations` value should have a `"button functions"` array with three `goTown` variables.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, goTown]);
 ```
 
-O quinto valor de `locations` deve ter uma propriedade `text` com o valor `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Your fifth `locations` value should have a `text` property with the value `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams Arg! as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
index ce1cb726a61..e9a89bc850a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8f06fb318666fef69f91e
-title: Passo 133
+title: Step 132
 challengeType: 0
-dashedName: step-133
+dashedName: step-132
 ---
 
 # --description--
 
-A palavra `Arg!` deve ter aspas ao redor dela. Além de escapar as aspas, há outra maneira você pode incluir aspas dentro de uma string.
+The word `"Arg!"` should have quotes around it. Além de escapar as aspas, há outra maneira você pode incluir aspas dentro de uma string.
 
-Mude as aspas duplas em torno da string `The monster screams Arg! as it dies. You gain experience points and find gold.` para aspas simples `'` e adicione aspas duplas em torno de `Arg!`.
+Change the double quotes around the string `"The monster screams Arg! as it dies. You gain experience points and find gold."` to single quotes `'`, then add double quotes around `"Arg!"`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ Você deve usar aspas simples em torno da string.
 assert.match(code, /'The monster screams "?Arg!"? as it dies. You gain experience points and find gold.'/);
 ```
 
-Você deve usar aspas duplas em torno de `Arg!`.
+You should use double quotes around `"Arg!"`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams "Arg!" as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
index 396f6e258c1..f99e91d3f92 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f14fe6d1fc72454648c7
-title: Passo 134
+title: Step 133
 challengeType: 0
-dashedName: step-134
+dashedName: step-133
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
index 16c95491abe..d585f318172 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f1d5f5ddbf74c07f733b
-title: Passo 135
+title: Step 134
 challengeType: 0
-dashedName: step-135
+dashedName: step-134
 ---
 
 # --description--
@@ -11,16 +11,16 @@ Na função `lose`, chame a função `update` e passe a ele o sexto objeto do ar
 
 # --hints--
 
-You should call the `update` function inside the `lose` function.
+Você deve chamar a função `update` dentro da função `lose`.
 
 ```js
 assert.match(lose.toString(), /update\(/);
 ```
 
-Your `update` function should have `locations[5]` for the argument.
+A função `update` deve ter `locations[5]` para o argumento.
 
 ```js
-assert.match(lose.toString(), /update\(locations\[5\]\)/);
+assert.match(lose.toString(), /update\(\s*locations\s*\[\s*5\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
index 5e537d70dff..4c49cc9312c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f20463b324759953edad
-title: Passo 136
+title: Step 135
 challengeType: 0
-dashedName: step-136
+dashedName: step-135
 ---
 
 # --description--
@@ -45,7 +45,7 @@ A função `restart` deve definir `currentWeapon` como `0`.
 assert.match(restart.toString(), /currentWeapon\s*=\s*0/);
 ```
 
-A função `restart` deve definir `inventory` como um array com a string `stick`.
+Your `restart` function should set `inventory` to an array with the string `"stick"`.
 
 ```js
 assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
@@ -54,7 +54,7 @@ assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
 A função `restart` deve chamar a função `goTown()`.
 
 ```js
-assert.match(restart.toString(), /goTown\(\)/);
+assert.match(restart.toString(), /goTown\(\s*\)/);
 ```
 
 Você deve definir `goldText.innerText` com o valor de `gold`.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
index daed05f3bc3..c312466deb2 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f256b813a476cae51f49
-title: Passo 138
+title: Step 137
 challengeType: 0
-dashedName: step-138
+dashedName: step-137
 ---
 
 # --description--
@@ -41,7 +41,7 @@ Você deve chamar a função `winGame` no bloco `if`.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\)(\s*\})?/);
+assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\s*\)(\s*\})?/);
 ```
 
 Você deve adicionar um bloco `else`.
@@ -55,7 +55,7 @@ O bloco `else` deve chamar a função `defeatMonster`.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\)(\s*\})?/);
+assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\s*\)(\s*\})?/);
 ```
 
 # --seed--
@@ -220,7 +220,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
index 6708eb366de..1d475e400e5 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
@@ -1,6 +1,6 @@
 ---
 id: 62a8f35bde1750791f58773f
-title: Passo 139
+title: Step 139
 challengeType: 0
 dashedName: step-139
 ---
@@ -20,7 +20,7 @@ assert.match(code, /function\s+winGame/);
 A função `winGame` deve chamar a função `update` e passar `locations[6]`.
 
 ```js
-assert.match(winGame.toString(), /update\s*\(\s*locations\[6\]\s*\)/);
+assert.match(winGame.toString(), /update\s*\(\s*locations\s*\[\s*6\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -185,7 +185,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
index 5fdfe3daaaf..90685a693f3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
@@ -1,13 +1,13 @@
 ---
 id: 62a94114ce0b8918b487390f
-title: Passo 140
+title: Step 140
 challengeType: 0
 dashedName: step-140
 ---
 
 # --description--
 
-Adicione outro objeto ao array `locations`. Tudo deve ser igual ao que vemos no objeto `lose`, com exceção de `name`, que deve ser `win`, e `text`, que deve ser `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Adicione outro objeto ao array `locations`. Everything should be the same as the `lose` object, except the `name` should be `"win"` and the `text` should be `"You defeat the dragon! VOCÊ VENCEU O JOGO! &#x1F389;"`.
 
 # --hints--
 
@@ -23,13 +23,13 @@ O sétimo valor de `locations` deve ser um objeto.
 assert.isObject(locations[6]);
 ```
 
-O sétimo valor de `locations` deve ter uma propriedade `name` com o valor `win`.
+Your seventh `locations` value should have a `name` property with the value `"win"`.
 
 ```js
 assert.equal(locations[6].name, 'win');
 ```
 
-O sétimo valor de `locations` deve ter um array `button text` com três strings `REPLAY?`.
+Your seventh `locations` value should have a `button text` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[6]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
@@ -41,10 +41,10 @@ O sétimo valor de `locations` deve ter um array `button functions` com três va
 assert.deepEqual(locations[6]["button functions"], [restart, restart, restart]);
 ```
 
-O sétimo valor de `locations` deve ter uma propriedade `text` com o valor `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Your seventh `locations` value should have a `text` property with the value `"You defeat the dragon! VOCÊ VENCEU O JOGO! &#x1F389;"`.
 
 ```js
-assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! 🎉');
+assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! &#x1F389;');
 ```
 
 # --seed--
@@ -210,7 +210,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 --fcc-editable-region--
 ];
@@ -228,7 +228,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
index f6de06db812..56ae38aab74 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1cea594f152ba626b872
-title: Passo 141
+title: Step 141
 challengeType: 0
 dashedName: step-141
 ---
@@ -16,7 +16,7 @@ Dentro da função `attack`, altere a linha `health -= monsters[fighting].level;
 Você deve atualizar a linha `health` para que seja `health -= getMonsterAttackValue(monsters[fighting].level);`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(monsters\[fighting\]\.level\)/);
+assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)/);
 ```
 
 # --seed--
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -204,7 +204,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
index 4896887471f..8d40a219164 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1d6736ba262cfa74344b
-title: Passo 142
+title: Step 142
 challengeType: 0
 dashedName: step-142
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
index 1ec8b9b140b..c05b5700504 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1d9f535e102e4663e7a6
-title: Passo 143
+title: Step 143
 challengeType: 0
 dashedName: step-143
 ---
@@ -9,7 +9,7 @@ dashedName: step-143
 
 O ataque do monstro será baseado no `level` do monstro e no `xp` do jogador. Na função `getMonsterAttackValue`, use `const` para criar uma variável chamada `hit`. Atribua a ela a equação `(level * 5) - (Math.floor(Math.random() * xp));`.
 
-This will set the monster's attack to five times their `level` minus a random number between `0` and the player's `xp`.
+Isso definirá o ataque do monstro para cinco vezes o próprio `level` menos um número aleatório entre `0` e o `xp` do jogador.
 
 # --hints--
 
@@ -22,13 +22,13 @@ assert.match(code, /const\s+hit/);
 Você deve usar a equação `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(Math\.random\(\)\s*\*\s*xp\))/);
+assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\))/);
 ```
 
 Você deve definir `hit` com o valor de `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(code, /hit\s*=\s*\(level\s*\*\s*5\)\s*-\s*\(Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\)/);
+assert.match(code, /hit\s*=\s*\(\s*level\s*\*\s*5\s*\)\s*-\s*\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
index a1a25c80356..1f421a05859 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1e3c7c3d552fb04f0f18
-title: Passo 144
+title: Step 144
 challengeType: 0
 dashedName: step-144
 ---
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
index e651cffd5ed..f92a6e0b148 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1e8ccd579330e097ce44
-title: Passo 145
+title: Step 145
 challengeType: 0
 dashedName: step-145
 ---
@@ -188,13 +188,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -211,7 +211,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
index f59f755a1ae..1f72a8c74c5 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1eec891ed731db227a36
-title: Passo 146
+title: Step 146
 challengeType: 0
 dashedName: step-146
 ---
@@ -207,13 +207,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -230,7 +230,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
index 79390d0db77..a515b75fc79 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa1fed3d4e873366ff3131
-title: Passo 147
+title: Step 147
 challengeType: 0
 dashedName: step-147
 ---
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
index 6c02466647b..9f7d4223e66 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa204c1e1d33348ff09944
-title: Passo 148
+title: Step 148
 challengeType: 0
 dashedName: step-148
 ---
@@ -14,7 +14,7 @@ Mova a atribuição de `monsterHealth` para o bloco `if`.
 Você deve mover `monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1` para o bloco `if`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1/)
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
index 0037b72a80f..a9f8fc5638a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
@@ -1,26 +1,26 @@
 ---
 id: 62aa20e9cf1be9358f5aceae
-title: Passo 149
+title: Step 149
 challengeType: 0
 dashedName: step-149
 ---
 
 # --description--
 
-Adicione uma instrução `else` à primeira instrução `if` dentro da função `attack()`. Na instrução `else`, use o operador `+=` para adicionar o texto `You miss.` ao final de `text.innerText`.
+Adicione uma instrução `else` à primeira instrução `if` dentro da função `attack()`. In the `else` statement, use the `+=` operator to add the text `" You miss."` to the end of `text.innerText`.
 
 # --hints--
 
 Você deve adicionar um bloco `else` após o seu bloco `if (isMonsterHit())`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else/)
 ```
 
-Você deve adicionar o texto `You miss.` no final do `text.innerText`. Lembre-se de usar a atribuição composta e certifique-se de que haja um espaço antes da palavra `You`.
+You should add the text `" You miss."` to the end of `text.innerText`. Lembre-se de usar a atribuição composta e certifique-se de que haja um espaço antes da palavra `You`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
index f26c48c049d..c6a7769b398 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2136fc49b836dfedb959
-title: Passo 150
+title: Step 150
 challengeType: 0
 dashedName: step-150
 ---
@@ -20,7 +20,7 @@ assert.match(code, /function\s+isMonsterHit/);
 A função `isMonsterHit` deve retornar o resultado da comparação `Math.random() > .2`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2/);
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
index f4167528de8..d78a44d0ff0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa21971e3b743844849985
-title: Passo 151
+title: Step 151
 challengeType: 0
 dashedName: step-151
 ---
@@ -32,7 +32,7 @@ assert.match(isMonsterHit.toString(), /\|\|\s*health\s*<\s*20/);
 A função deve retornar o resultado da comparação `Math.random() > .2` **ou** `health < 20`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
 ```
 
 # --seed--
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
index 3f7437f7c56..bef05b1783d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa21ea8d9d9f396b95dd87
-title: Passo 152
+title: Step 152
 challengeType: 0
 dashedName: step-152
 ---
 
 # --description--
 
-Em cada ataque, deve haver uma chance que a arma do jogador quebre. At the end of the `attack` function, add an empty `if` statement with the condition `Math.random() <= .1`.
+Em cada ataque, deve haver uma chance que a arma do jogador quebre. No final da função `attack`, adicione uma instrução `if` vazia com a condição `Math.random() <= .1`.
 
 # --hints--
 
@@ -21,7 +21,7 @@ assert.lengthOf(ifs, 5);
 A nova instrução `if` deve verificar `Math.random() <= .1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\)\s*<=\s*0?\.1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*<=\s*0?\.1\s*\)/);
 ```
 
 # --seed--
@@ -186,13 +186,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -209,7 +209,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
index 1ccaff1f214..9a366f1dc06 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa226207f33d3ad4c6f546
-title: Passo 153
+title: Step 153
 challengeType: 0
 dashedName: step-153
 ---
 
 # --description--
 
-Use the `+=` operator to add `Your <weapon> breaks.`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
+Use the `+=` operator to add `" Your <weapon> breaks."`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
 
 # --hints--
 
@@ -21,7 +21,7 @@ assert.lengthOf(concat, 3);
 Você deve usar o método `pop` no array `inventory`.
 
 ```js
-assert.match(attack.toString(), /inventory\.pop\(\)/);
+assert.match(attack.toString(), /inventory\.pop\(\s*\)/);
 ```
 
 Você deve adicionar `Your`, com um espaço antes e um depois da expressão, a `text.innerText`.
@@ -30,17 +30,16 @@ Você deve adicionar `Your`, com um espaço antes e um depois da expressão, a `
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1/);
 ```
 
-Você deve adicionar o valor de retorno de `inventory.pop()` à string `Your`.
+You should add the return value of `inventory.pop()` to the `" Your "` string.
 
 ```js
-console.log(attack.toString());
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)/);
 ```
 
-Você deve adicionar `breaks.`, com um espaço antes da expressão, ao final da string.
+You should add `" breaks."`, with a space in front of it, to the end of your string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)\s*\+\s*('|")\sbreaks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)\s*\+\s*('|")\sbreaks\.\2/);
 ```
 
 # --seed--
@@ -205,13 +204,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -228,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
index c94bed1bbec..f7bfabc5372 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
@@ -1,13 +1,19 @@
 ---
 id: 62aa22aba186563bcbf2c395
-title: Passo 154
+title: Step 154
 challengeType: 0
 dashedName: step-154
 ---
 
 # --description--
 
-Lembre-se de que o operador de incremento `++` pode ser usado para aumentar o valor de uma variável em 1. Há também um <dfn>operador de decremento</dfn> `--` que pode ser usado para diminuir o valor de uma variável em 1.
+Remember that the increment operator `++` can be used to increase a variable's value by `1`. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by `1`. For example :
+
+```js
+let num = 10;
+num--;
+console.log(num); // Output: 9
+```
 
 Diminua o valor de `currentWeapon` na instrução `if` depois de atualizar o texto.
 
@@ -187,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -210,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
index da40d69e053..f849ece84f8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa234322d4ad3e8bce42cc
-title: Passo 155
+title: Step 155
 challengeType: 0
 dashedName: step-155
 ---
@@ -24,19 +24,19 @@ if (firstName === "Quincy" && lastName === "Larson") {
 Você não deve modificar a instrução `if` existente.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1/);
 ```
 
 Você deve usar o operador lógico AND `&&`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&/);
 ```
 
 Você deve usar o operador lógico AND para verificar se `inventory.length` não é igual a `1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
 ```
 
 # --seed--
@@ -201,13 +201,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
index e80f3f08e4f..22b65d61d27 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2469c77b363fdb4f0e06
-title: Passo 156
+title: Step 156
 challengeType: 0
 dashedName: step-156
 ---
@@ -28,7 +28,7 @@ assert.match(easterEgg.toString(), /update\(/);
 `easterEgg` deve chamar a função `update` com `locations[7]` como argumento.
 
 ```js
-assert.match(easterEgg.toString(), /update\(\s*locations\[7\]\s*\)/);
+assert.match(easterEgg.toString(), /update\(\s*locations\s*\[\s*7\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
index b99c9619d9f..9d188192a98 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa252c3b1073415ba2b898
-title: Passo 157
+title: Step 157
 challengeType: 0
 dashedName: step-157
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
index eeaece384ce..f33470b66bf 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa258da314ef42ba0a1858
-title: Passo 158
+title: Step 158
 challengeType: 0
 dashedName: step-158
 ---
@@ -211,13 +211,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -234,7 +234,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
index 85a99b0155a..95800f9e421 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa25fcb5837d43b4d9873d
-title: Passo 159
+title: Step 159
 challengeType: 0
 dashedName: step-159
 ---
 
 # --description--
 
-Adicione outro objeto para o array `locations`. Defina `name` como `easter egg`, defina `button text` como um array com as strings `2`, `8` e `Go to town square?`, defina `button functions` como um array com as variáveis `pickTwo`, `pickEight` e `goTown`, e `text` como `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Adicione outro objeto para o array `locations`. Set `name` to `"easter egg"`, set `"button text"` to an array with the strings `"2"`, `"8"`, and `"Go to town square?"`, set `"button functions"` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 # --hints--
 
@@ -23,25 +23,25 @@ O oitavo valor de `locations` deve ser um objeto.
 assert.isObject(locations[7]);
 ```
 
-O oitavo valor de `locations` deve ter uma propriedade `name` com o valor `easter egg`.
+Your eighth `locations` value should have a `name` property with the value `"easter egg"`.
 
 ```js
 assert.equal(locations[7].name, "easter egg");
 ```
 
-O oitavo valor de `locations` deve ter um array `button text` com as strings `2`, `8` e `Go to town square?`.
+Your eighth `locations` value should have a `"button text"` array with the strings `"2"`, `"8"`, and `"Go to town square?"`.
 
 ```js
 assert.deepEqual(locations[7]["button text"], ["2", "8", "Go to town square?"]);
 ```
 
-O oitavo valor de `locations` deve ter um array `button functions` com as variáveis `pickTwo`, `pickEight` e `goTown`.
+Your eighth `locations` value should have a `"button functions"` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[7]["button functions"], [pickTwo, pickEight, goTown]);
 ```
 
-O valor do oitavo `locations` deve ter uma propriedade `text` com o valor `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Your eighth `locations` value should have a `text` property with the value `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 ```js
 assert.equal(locations[7].text, "You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!");
@@ -209,13 +209,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
 --fcc-editable-region--
 
@@ -235,7 +235,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
index 6bbcc769c91..1cafd5750fc 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
@@ -1,20 +1,20 @@
 ---
 id: 62aa2626c3c10244b94c787b
-title: Passo 160
+title: Step 160
 challengeType: 0
 dashedName: step-160
 ---
 
 # --description--
 
-Inside `pick`, use `const` to initialize a variable named `numbers` and set it to an empty array.
+Dentro de `pick`, use `const` para inicializar uma variável chamada `numbers` e configurá-la como um array vazio.
 
 # --hints--
 
 A função `pick` deve inicializar `numbers` como um array vazio `[]`.
 
 ```js
-assert.match(pick.toString(), /numbers\s*=\s*\[\]/);
+assert.match(pick.toString(), /numbers\s*=\s*\[\s*\]/);
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
index 6e70df153d7..796f46f6b0b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa264d23cdaa45a20efada
-title: Passo 161
+title: Step 161
 challengeType: 0
 dashedName: step-161
 ---
@@ -195,13 +195,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
index 9ebb21f52e4..e09761c5528 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa26cca3cd3d46c431e73b
-title: Passo 162
+title: Step 162
 challengeType: 0
 dashedName: step-162
 ---
 
 # --description--
 
-Inside your `while` loop, push a random number between `0` and `10` to the end of the `numbers` array. Você pode criar esse número aleatório com `Math.floor(Math.random() * 11)`.
+Dentro do laço `while`, coloque um número aleatório entre `0` e `10` até o final do array `numbers`. Você pode criar esse número aleatório com `Math.floor(Math.random() * 11)`.
 
 # --hints--
 
@@ -20,13 +20,13 @@ assert.match(pick.toString(), /numbers\.push\(/);
 Você deve usar `Math.floor(Math.random() * 11)` para criar um número aleatório.
 
 ```js
-assert.match(pick.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)/);
+assert.match(pick.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)/);
 ```
 
 Você deve fazer um `push` do resultado de `Math.floor(Math.random() * 11)` para o final do array `numbers`.
 
 ```js
-assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)\s*\)/);
+assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
index 95c7f1cfb0e..ad56436f80a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
@@ -1,29 +1,29 @@
 ---
 id: 62aa27227399d647e1c37a3c
-title: Passo 163
+title: Step 163
 challengeType: 0
 dashedName: step-163
 ---
 
 # --description--
 
-After the `while` loop, set `text.innerText` to equal `You picked <someGuess>. Here are the random numbers:`. Replace `<someGuess>` with the `guess` function parameter.
+After the `while` loop, set `text.innerText` to equal `"You picked <someGuess>. Here are the random numbers:"`. Replace `<someGuess>` with the `guess` function parameter.
 
 # --hints--
 
-Você deve definir `text.innerText` com a string `You picked`. Lembre-se de que o espaçamento é importante.
+You should set `text.innerText` to the string `"You picked "`. Lembre-se de que o espaçamento é importante.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1/);
 ```
 
-Você deve usar o operador de concatenação para adicionar o valor do parâmetro `guess` à string `You picked`.
+You should use the concatenation operator to add the value of the `guess` parameter to your `"You picked "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess/);
 ```
 
-Você deve usar o operador de concatenação para adicionar a string `. Here are the random numbers:` à string `"You picked " + guess`.
+You should use the concatenation operator to add the string `". Here are the random numbers:"` to your `"You picked " + guess` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\2/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
index 1283b5ec696..1e41e37ed18 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa27560def7048d7b4a095
-title: Passo 164
+title: Step 164
 challengeType: 0
 dashedName: step-164
 ---
@@ -11,7 +11,7 @@ No final da string, antes da aspa final, insira um caractere de escape de nova l
 
 # --hints--
 
-Você deve adicionar a nova linha de caractere de escape `\n` à string `. Here are the random numbers:`.
+You should add the new line escape character `\n` to your `". Here are the random numbers: "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\\n\2/);
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
index 38b92a42796..1524c7985d6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa27c40ca6f04ab8be5fac
-title: Passo 165
+title: Step 165
 challengeType: 0
 dashedName: step-165
 ---
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -214,7 +214,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
index 8b3b5e41810..2a30833b68e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa28032d863d4bd8058799
-title: Passo 166
+title: Step 166
 challengeType: 0
 dashedName: step-166
 ---
@@ -11,7 +11,7 @@ Laços `for` são declarados com três expressões separadas por ponto e vírgul
 
 A expressão de inicialização é executada apenas uma vez, antes do laço iniciar, e é frequentemente usada para definir e configurar a variável de laço. Pense nisso como declarar um contador para usar no laço.
 
-Muitos laços `for` usam `i` como contador e começam de 0, então altere `let x = 1;` para `let i = 0;`.
+Muitos laços do tipo `for` usam `i` como contador e começam do `0`, então mude `let x = 1;` para `let i = 0;`.
 
 # --hints--
 
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
index 66d3226fd2d..58407072b8a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa287434dc284cea01157c
-title: Passo 167
+title: Step 167
 challengeType: 0
 dashedName: step-167
 ---
@@ -9,7 +9,7 @@ dashedName: step-167
 
 A segunda instrução em um laço `for`, a instrução condicional, é avaliada no início de cada iteração de laço. O laço continuará enquanto a condição for avaliada como verdadeira.
 
-Queremos que o laço seja executado 10 vezes. Assim, altere `x < 5` para `i < 10`.
+Desejamos que o laço se repita `10` vezes, então substitua `x < 5` por `i < 10`.
 
 # --hints--
 
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
index 8cb1ea8b8f5..7ca017b4d64 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa28bbd6323e4dfb3ac43e
-title: Passo 168
+title: Step 168
 challengeType: 0
 dashedName: step-168
 ---
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
index 38c47e45ca2..dd6ef8bf7fc 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa28fb651bf14efa2dbb16
-title: Passo 169
+title: Step 169
 challengeType: 0
 dashedName: step-169
 ---
@@ -20,20 +20,19 @@ assert.match(pick.toString(), /text\.innerText\s*\+=/);
 Você deve usar a notação de colchetes para acessar `numbers[i]`.
 
 ```js
-assert.match(pick.toString(), /numbers\[i\]/);
+assert.match(pick.toString(), /numbers\s*\[\s*i\s*\]/);
 ```
 
 Você deve adicionar `numbers[i]` ao valor de `text.innerText`.
 
 ```js
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]/);
 ```
 
 Você deve adicionar um novo caractere de linha após o valor `numbers[i]`. Lembre-se de que você pode fazer isso com `\n`.
 
 ```js
-console.log(pick.toString());
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]\s*\+\s*('|")\\n\1/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]\s*\+\s*('|")\\n\1/);
 ```
 
 # --seed--
@@ -198,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
index 03db7923f60..3d2bd32e299 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2943669c9d5026af6985
-title: Passo 170
+title: Step 170
 challengeType: 0
 dashedName: step-170
 ---
@@ -198,13 +198,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
index 7598720cb31..af6f163b792 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
@@ -1,17 +1,17 @@
 ---
 id: 62aa2999ec27ec516655eba6
-title: Passo 171
+title: Step 171
 challengeType: 0
 dashedName: step-171
 ---
 
 # --description--
 
-Inside the `if` statement, add the string `Right! You win 20 gold!` to the end of `text.innerText`. Além disso, adicione `20` ao valor de `gold` e atualize `goldText.innerText`.
+Inside the `if` statement, add the string `"Right! You win 20 gold!"` to the end of `text.innerText`. Além disso, adicione `20` ao valor de `gold` e atualize `goldText.innerText`.
 
 # --hints--
 
-Você deve usar a atribuição composta para adicionar a string `Right! You win 20 gold!` ao final de `text.innerText`.
+You should use compound assignment to add the string `"Right! You win 20 gold!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Right! You win 20 gold!\1/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
index 734b303973a..aae13c1baf8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62aa29d8f8f88152c91350ca
-title: Passo 172
+title: Step 172
 challengeType: 0
 dashedName: step-172
 ---
 
 # --description--
 
-Now add an `else` statement. Dentro, adicione `Wrong! You lose 10 health!` ao final de `text.innerText`. Subtraia `10` de `health` e atualize `healthText.innerText`.
+Now add an `else` statement. Inside, add `"Wrong! You lose 10 health!"` to the end of `text.innerText`. Subtraia `10` de `health` e atualize `healthText.innerText`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ Você deve adicionar um bloco `else`.
 assert.match(pick.toString(), /else\s*\{/);
 ```
 
-O bloco `else` deve usar a atribuição composta para adicionar `Wrong! You lose 10 health!` ao final de `text.innerText`.
+Your `else` block should use compound assignment to add `"Wrong! You lose 10 health!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Wrong! You lose 10 health!\1/);
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -226,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
index b2fb2d4b275..aaf9475557c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
@@ -1,6 +1,6 @@
 ---
 id: 62aa2aec2f09d454253aad6c
-title: Passo 173
+title: Step 173
 challengeType: 0
 dashedName: step-173
 ---
@@ -27,7 +27,7 @@ assert.match(pick.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 A instrução `if` deve chamar a função `lose`.
 
 ```js
-assert.match(pick.toString(), /lose\(\)/);
+assert.match(pick.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
@@ -192,13 +192,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -221,7 +221,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
index e8c0c2412f3..af0d8785963 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
@@ -1,19 +1,19 @@
 ---
 id: 62aa2ba9cd881355a6f0a5a8
-title: Passo 174
+title: Step 174
 challengeType: 0
 dashedName: step-174
 ---
 
 # --description--
 
-Olhando para o objeto `kill monster`, `button functions` atualmente tem três variáveis `goTown`. Substitua o terceiro por `easterEgg` – é assim que um jogador acessará as características ocultas do jogo. Não altere o `button text`.
+Looking at your `"kill monster"` object, `"button functions"` currently has three `goTown` variables. Substitua o terceiro por `easterEgg` – é assim que um jogador acessará as características ocultas do jogo. Do not change the `"button text"`.
 
 Com isso, o jogo de RPG está completo! Agora, você pode jogar – será que consegue derrotar o dragão?
 
 # --hints--
 
-Você deve atualizar o quinto objeto de `locations` para ter uma propriedade `button functions` de `[goTown, goTown, easterEgg]`.
+You should update your fifth `locations` object to have a `"button functions"` property of `[goTown, goTown, easterEgg]`.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, easterEgg]);
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
@@ -557,13 +557,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
index f1f6baf9617..35bf581fbff 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
@@ -1,13 +1,13 @@
 ---
 id: 62ba17beef16c563069a65d8
-title: Passo 137
+title: Step 136
 challengeType: 0
-dashedName: step-137
+dashedName: step-136
 ---
 
 # --description--
 
-No array `locations`, adicione outro objeto no final. Defina a propriedade `name` como `lose`, defina `button text` como um array com três strings `REPLAY?`, defina `button functions` como um array três variáveis `restart` e defina `text` como `You die. ☠️`. Você pode copiar esse texto para usar este emote.
+No array `locations`, adicione outro objeto no final. Set the `name` property to `"lose"`, set `"button text"` to an array with three `"REPLAY?"` strings, set `"button functions"` to an array with three `restart` variables, and set `text` to `"You die. &#x2620;"`.
 
 # --hints--
 
@@ -23,28 +23,28 @@ O sexto valor de `locations` deve ser um objeto.
 assert.isObject(locations[5]);
 ```
 
-O sexto valor de `locations` deve ter uma propriedade `name` com o valor `lose`.
+Your sixth `locations` value should have a `name` property with the value `"lose"`.
 
 ```js
 assert.equal(locations[5].name, 'lose');
 ```
 
-O sexto valor de `locations` deve ter um array `button text` com três strings `REPLAY?`.
+Your sixth `locations` value should have a `"button text"` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[5]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
 ```
 
-O sexto valor de `locations` deve ter um array `button functions` com três variáveis `restart`.
+Your sixth `locations` value should have a `"button functions"` array with three `restart` variables.
 
 ```js
 assert.deepEqual(locations[5]["button functions"], [restart, restart, restart]);
 ```
 
-O sexto valor de `locations` deve ter uma propriedade `text` com o valor `You die. ☠️`.
+Your sixth `locations` value should have a `text` property with the value `"You die. &#x2620;"`.
 
 ```js
-assert.equal(locations[5].text, 'You die. ☠️');
+assert.equal(locations[5].text, 'You die. &#x2620;');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
index 0a76d9e87a4..0d3ad6d4d1f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
@@ -17,7 +17,7 @@ Você deve declarar uma variável `button2` com `const`.
 assert.match(code, /const\s+button2/);
 ```
 
-A variável `button2` deve ter o valor do elemento `#button2`.
+Your `button2` variable should have the value of your `"#button2"` element.
 
 ```js
 assert.deepEqual(button2, document.querySelector('#button2'));
@@ -29,7 +29,7 @@ Você deve declarar uma variável `button3` com `const`.
 assert.match(code, /const\s+button3/);
 ```
 
-A variável `button3` deve ter o valor do elemento `#button3`.
+Your `button3` variable should have the value of your `"#button3"` element.
 
 ```js
 assert.deepEqual(button3, document.querySelector('#button3'));
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
new file mode 100644
index 00000000000..432c7be3420
--- /dev/null
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
@@ -0,0 +1,356 @@
+---
+id: 65b2f6acce65b7a69751a090
+title: Step 138
+challengeType: 0
+dashedName: step-138
+---
+
+# --description--
+
+In order for the `&#x2620;` emoticon text to properly display on the page, you will need to use the <dfn>innerHTML</dfn> property.
+
+The `innerHTML` property allows you to access or modify the content inside an HTML element using JavaScript.
+
+Here is an example of updating the content for this paragraph element using the `innerHTML`  property.
+
+```html
+<p id="demo">This is a paragraph.</p>
+```
+
+```js
+document.querySelector("#demo").innerHTML = "Hello, innerHTML!";
+```
+
+In the `update` function, change `text.innerText` to `text.innerHTML`.
+
+# --hints--
+
+
+You should use dot notation to access the `innerHTML` property of `text`.
+
+```js
+assert.match(code, /text\.innerHTML/);
+```
+
+You should not use `let` or `const` to access the `innerHTML` property of `text`.
+
+```js
+assert.notMatch(code, /(let|const)\s+text.innerHTML/);
+```
+
+You should set `innerHTML` equal to the `text` property of `location`.
+
+```js
+assert.match(code, /text\.innerHTML\s*=\s*location\.text/);
+```
+
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <link rel="stylesheet" href="./styles.css">
+    <title>RPG - Dragon Repeller</title>
+  </head>
+  <body>
+    <div id="game">
+      <div id="stats">
+        <span class="stat">XP: <strong><span id="xpText">0</span></strong></span>
+        <span class="stat">Health: <strong><span id="healthText">100</span></strong></span>
+        <span class="stat">Gold: <strong><span id="goldText">50</span></strong></span>
+      </div>
+      <div id="controls">
+        <button id="button1">Go to store</button>
+        <button id="button2">Go to cave</button>
+        <button id="button3">Fight dragon</button>
+      </div>
+      <div id="monsterStats">
+        <span class="stat">Monster Name: <strong><span id="monsterName"></span></strong></span>
+        <span class="stat">Health: <strong><span id="monsterHealth"></span></strong></span>
+      </div>
+      <div id="text">
+        Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.
+      </div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+body {
+  background-color: #0a0a23;
+}
+
+#text {
+  background-color: #0a0a23;
+  color: #ffffff;
+  padding: 10px;
+}
+
+#game {
+  max-width: 500px;
+  max-height: 400px;
+  background-color: #ffffff;
+  color: #ffffff;
+  margin: 30px auto 0px;
+  padding: 10px;
+}
+
+#controls,
+#stats {
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #0a0a23;
+}
+
+#monsterStats {
+  display: none;
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #ffffff;
+  background-color: #c70d0d;
+}
+
+.stat {
+  padding-right: 10px;
+}
+
+button {
+  cursor: pointer;
+  color: #0a0a23;
+  background-color: #feac32;
+  background-image: linear-gradient(#fecc4c, #ffac33);
+  border: 3px solid #feac32;
+}
+```
+
+```js
+let xp = 0;
+let health = 100;
+let gold = 50;
+let currentWeapon = 0;
+let fighting;
+let monsterHealth;
+let inventory = ["stick"];
+
+const button1 = document.querySelector('#button1');
+const button2 = document.querySelector("#button2");
+const button3 = document.querySelector("#button3");
+const text = document.querySelector("#text");
+const xpText = document.querySelector("#xpText");
+const healthText = document.querySelector("#healthText");
+const goldText = document.querySelector("#goldText");
+const monsterStats = document.querySelector("#monsterStats");
+const monsterName = document.querySelector("#monsterName");
+const monsterHealthText = document.querySelector("#monsterHealth");
+const weapons = [
+  { name: 'stick', power: 5 },
+  { name: 'dagger', power: 30 },
+  { name: 'claw hammer', power: 50 },
+  { name: 'sword', power: 100 }
+];
+const monsters = [
+  {
+    name: "slime",
+    level: 2,
+    health: 15
+  },
+  {
+    name: "fanged beast",
+    level: 8,
+    health: 60
+  },
+  {
+    name: "dragon",
+    level: 20,
+    health: 300
+  }
+]
+const locations = [
+  {
+    name: "town square",
+    "button text": ["Go to store", "Go to cave", "Fight dragon"],
+    "button functions": [goStore, goCave, fightDragon],
+    text: "You are in the town square. You see a sign that says \"Store\"."
+  },
+  {
+    name: "store",
+    "button text": ["Buy 10 health (10 gold)", "Buy weapon (30 gold)", "Go to town square"],
+    "button functions": [buyHealth, buyWeapon, goTown],
+    text: "You enter the store."
+  },
+  {
+    name: "cave",
+    "button text": ["Fight slime", "Fight fanged beast", "Go to town square"],
+    "button functions": [fightSlime, fightBeast, goTown],
+    text: "You enter the cave. You see some monsters."
+  },
+  {
+    name: "fight",
+    "button text": ["Attack", "Dodge", "Run"],
+    "button functions": [attack, dodge, goTown],
+    text: "You are fighting a monster."
+  },
+  {
+    name: "kill monster",
+    "button text": ["Go to town square", "Go to town square", "Go to town square"],
+    "button functions": [goTown, goTown, goTown],
+    text: 'The monster screams "Arg!" as it dies. You gain experience points and find gold.'
+  },
+  {
+    name: "lose",
+    "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
+    "button functions": [restart, restart, restart],
+    text: "You die. &#x2620;"
+  }
+
+];
+
+// initialize buttons
+button1.onclick = goStore;
+button2.onclick = goCave;
+button3.onclick = fightDragon;
+
+function update(location) {
+  --fcc-editable-region--
+  monsterStats.style.display = "none";
+  button1.innerText = location["button text"][0];
+  button2.innerText = location["button text"][1];
+  button3.innerText = location["button text"][2];
+  button1.onclick = location["button functions"][0];
+  button2.onclick = location["button functions"][1];
+  button3.onclick = location["button functions"][2];
+  text.innerText = location.text;
+  --fcc-editable-region--
+}
+
+function goTown() {
+  update(locations[0]);
+}
+
+function goStore() {
+  update(locations[1]);
+}
+
+function goCave() {
+  update(locations[2]);
+}
+
+function buyHealth() {
+  if (gold >= 10) {
+    gold -= 10;
+    health += 10;
+    goldText.innerText = gold;
+    healthText.innerText = health;
+  } else {
+    text.innerText = "You do not have enough gold to buy health.";
+  }
+}
+
+function buyWeapon() {
+  if (currentWeapon < weapons.length - 1) {
+    if (gold >= 30) {
+      gold -= 30;
+      currentWeapon++;
+      goldText.innerText = gold;
+      let newWeapon = weapons[currentWeapon].name;
+      text.innerText = "You now have a " + newWeapon + ".";
+      inventory.push(newWeapon);
+      text.innerText += " In your inventory you have: " + inventory;
+    } else {
+      text.innerText = "You do not have enough gold to buy a weapon.";
+    }
+  } else {
+    text.innerText = "You already have the most powerful weapon!";
+    button2.innerText = "Sell weapon for 15 gold";
+    button2.onclick = sellWeapon;
+  }
+}
+
+function sellWeapon() {
+  if (inventory.length > 1) {
+    gold += 15;
+    goldText.innerText = gold;
+    let currentWeapon = inventory.shift();
+    text.innerText = "You sold a " + currentWeapon + ".";
+    text.innerText += " In your inventory you have: " + inventory;
+  } else {
+    text.innerText = "Don't sell your only weapon!";
+  }
+}
+
+function fightSlime() {
+  fighting = 0;
+  goFight();
+}
+
+function fightBeast() {
+  fighting = 1;
+  goFight();
+}
+
+function fightDragon() {
+  fighting = 2;
+  goFight();
+}
+
+function goFight() {
+  update(locations[3]);
+  monsterHealth = monsters[fighting].health;
+  monsterStats.style.display = "block";
+  monsterName.innerText = monsters[fighting].name;
+  monsterHealthText.innerText = monsterHealth;
+}
+
+function attack() {
+  text.innerText = "The " + monsters[fighting].name + " attacks.";
+  text.innerText += " You attack it with your " + weapons[currentWeapon].name + ".";
+  health -= monsters[fighting].level;
+  monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1;
+  healthText.innerText = health;
+  monsterHealthText.innerText = monsterHealth;
+   if (health <= 0) {
+    lose();
+  } else if (monsterHealth <= 0) {
+    if (fighting === 2) {
+      winGame();
+    } else {
+      defeatMonster();
+    }
+  }
+}
+
+function dodge() {
+  text.innerText = "You dodge the attack from the " + monsters[fighting].name;
+}
+
+function defeatMonster() {
+  gold += Math.floor(monsters[fighting].level * 6.7);
+  xp += monsters[fighting].level;
+  goldText.innerText = gold;
+  xpText.innerText = xp;
+  update(locations[4]);
+}
+
+function lose() {
+  update(locations[5]);
+}
+
+function restart() {
+  xp = 0;
+  health = 100;
+  gold = 50;
+  currentWeapon = 0;
+  inventory = ["stick"];
+  goldText.innerText = gold;
+  healthText.innerText = health;
+  xpText.innerText = xp;
+  goTown();
+}
+```
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
index 6bc175e7859..52fc0f01a49 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
@@ -22,21 +22,21 @@ Você deve usar a notação de colchete para acessar a propriedade de `totalCoun
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 Você deve usar o operador de atribuição para atualizar o valor da propriedade de `totalCountPerProduct` que corresponde a `dessert.id`.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=/);
 ```
 
 Você deve atualizar o valor de `totalCountPerProduct` para que seja o valor atual mais um.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\+\s*1/);
 ```
 
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
index 57b4bb31947..cd95e1656c9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
@@ -17,28 +17,28 @@ You should wrap your right-hand `totalCountPerProduct[dessert.id]` in parenthese
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 Você deve usar o operador `||`.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*/);
 ```
 
 Você deve usar `0` como valor de fallback.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
 ```
 
 Você ainda deve adicionar `1` ao valor.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
index 90d5bf5bba4..9944bbd2f2b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
@@ -29,7 +29,7 @@ Você deve atribuir o valor de `totalCountPerProduct[product.id]` como `currentP
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\[product\.id\]/);
+assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\s*\[\s*product\.id\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
index bcadbe2e4f0..a3987f8ab27 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
@@ -32,7 +32,7 @@ assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*
 Você deve adicionar uma função de callback vazia ao "ouvinte" de evento. Lembre-se de dar a ele um parâmetro `event`.
 
 ```js
-assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*\s*\}\s*\)/);
+assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*;?\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
index cb9e7ae790e..bb47af693a1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
@@ -53,7 +53,7 @@ A chamada de `reduce` deve ter um valor inicial igual a `0`.
 
 ```js
 const afterCalculateTotal = code.split('calculateTotal')[1];
-assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(total,\s*item\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
+assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(\s*total,\s*item\s*\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
index ab52645f107..6ee3678c287 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
@@ -37,7 +37,6 @@ assert.match(afterCalculateTaxes, /amount\s*\*\s*\(\s*this\s*\.\s*taxRate\s*\/\s
 O método `calculateTaxes` deve retornar o valor de `taxRate` (dividido por 100, para convertê-lo em uma porcentagem) multiplicado pelo parâmetro `amount`.
 
 ```js
-console.log(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 assert.equal(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 ```
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
index 83e1888cc27..5bd90364512 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
@@ -19,37 +19,37 @@ Start by accessing the `#playlist-songs`, `#play`, and `#pause` elements with th
 You should use `document.getElementById()` to get the `#playlist-songs` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should assign the `#playlist-songs` element to the variable `playlistSongs`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#play` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should assign the `#play` element to the variable `playButton`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#pause` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 You should assign the `#pause` element to the variable `pauseButton`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
index ac8b6b10112..2d4e4c81e9e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
@@ -16,37 +16,37 @@ Assign them to variables named `nextButton`, `previousButton`, and `shuffleButto
 You should use `document.getElementById()` to get the `#next` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should assign the `#next` element to the variable `nextButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#previous` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should assign the `#previous` element to the variable `previousButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#shuffle` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 You should assign the `#shuffle` element to the variable `shuffleButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
index a4e4513e943..6282c58f1c9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
@@ -18,13 +18,13 @@ Use `const` to create a variable named `audio` and set it equal to `new Audio()`
 You should use the `new` keyword to create an instance of the `Audio` object.
 
 ```js
-assert.match(code, /new\s+Audio\(\);?/)
+assert.match(code, /new\s+Audio\(\s*\);?/)
 ```
 
 You should assign the `Audio` object to a constant named `audio`.
 
 ```js
-assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\);?/)
+assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
index 30a9f108e9e..94af88842cb 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
@@ -34,7 +34,7 @@ assert.match(code, /userData\?\.songs\.find\(/)
 Your `find` method should have `song` as the parameter of its arrow function callback.
 
 ```js
-assert.match(code, /userData\?\.songs\.find\(\(?song\)?/)
+assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 Your `find` method should use strict equality to check if `song.id` is equal to `id`.
@@ -46,7 +46,7 @@ assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(so
 Your `find` method should be assigned to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\);?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
index 08a839dec2f..66ea43efbf5 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
@@ -13,22 +13,22 @@ Also, set the `audio.title` property equal to `song.title`. This tells the audio
 
 # --hints--
 
-You should not modify the exist `playSong` function and its content.
+You should not modify the existing `playSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?/)
 ```
 
 You should set `audio.src` to `song.src`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?/)
 ```
 
 You should set `audio.title` to `song.title`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
index e22cf3bf9f2..90d645ed63d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
@@ -17,13 +17,13 @@ Add an `if` statement to check whether the `userData?.currentSong` is `null` or
 You should create an `if` statement with the condition `userData?.currentSong === null || userData?.currentSong.id !== song.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*/)
 ```
 
 You should set `audio.currentTime` to `0` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
index 7aedbf78906..4d6c8bd7ebf 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
@@ -11,9 +11,11 @@ You need to update the current song being played as well as the appearance of th
 
 Start by accessing the `userData` object and its `currentSong` property. Set its value equal to the `song` variable.
 
+*Note*: You should not use the optional chaining operator `?.` in this step because `userData.currentSong` will not be `null` or `undefined` at this point.
+
 # --hints--
 
-You should set `userData.currentSong` to `song`.
+You should assign `song` to `userData.currentSong`.
 
 ```js
 assert.match(code, /userData\.currentSong\s*=\s*song;?/)
@@ -614,7 +616,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   --fcc-editable-region--
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
index a6cd8f59e99..17782cfe07a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
@@ -7,9 +7,9 @@ dashedName: step-33
 
 # --description--
 
-You need to hook up the `playSong` function to a `click` event listener so the songs will start playing when the play button is clicked.
+In previous steps you built out the functionality for playing a song. Now you need to add the functionality to the play button so that it will play the current song when it is clicked on.
 
-Add a click event listener to the `playButton` element, then use arrow syntax to pass in a callback with an empty pair of curly braces.
+Use the `addEventListener()` method and pass in a `click` event for the first argument and an empty callback function with arrow syntax for the second argument, e.g., `() => {}`.
 
 # --hints--
 
@@ -22,13 +22,13 @@ assert.match(code, /playButton\.addEventListener\(/)
 O "ouvinte" de evento deve "ouvir" o evento de `click`.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback into your event listener. Don't forget you also need an empty pair of curly braces.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
index ea09ad378da..5f6dfca6868 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+songsHTML/);
 You should assign `array.map()` to your `songsHTML`.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\)/);
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
index 4c8936ce1e6..52708b5efe6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
@@ -32,7 +32,7 @@ assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\
 You should interpolate `song.title` as the content of your `span` element.
 
 ```js
-assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\$\{song\.title\}\s*<\/span>\s*<\/button>/)
+assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\s*\$\{\s*song\.title\s*\}\s*<\/span>\s*<\/button>/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
index 4d04bc17e06..e2e168f130c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
@@ -24,7 +24,7 @@ assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*/)
 Your button element should have an `aria-label` attribute with the value `Delete ${song.title}` as its second attribute and value.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2\s*>/)
 ```
 
 You should paste in the provided `svg` as the content of your `button` element.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
index 3bc5d0f6f42..f00930596a2 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
@@ -24,7 +24,7 @@ Chain the `join()` method to your `map()` method and pass in an empty string for
 You should add `join("")` to the existing code.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\)\s*\.join\(('|")\3\);?/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\s*\)\s*\.join\(\s*('|")\3\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
index 14d51a29cb8..bd34a57a785 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
@@ -35,7 +35,7 @@ Call the `renderSongs` function with the `songs` property of `userData`. This wi
 You should call your `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /renderSongs\(userData\?\.songs\)/)
+assert.match(code, /renderSongs\(\s*userData\?\.songs\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
index 86f6f0f9612..67b50b17ef7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
@@ -9,20 +9,20 @@ dashedName: step-34
 
 Within the arrow function of the event listener, add an `if` to check if `userData?.currentSong` is `null`.
 
-Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData.songs` array. This will ensure the first song in the playlist is played first.
+Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData?.songs` array. This will ensure the first song in the playlist is played first.
 
 # --hints--
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
index 9c1a757d564..11c2da4191e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
@@ -16,20 +16,20 @@ This ensures that the currently playing song will continue to play when the play
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` block to your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.currentSong.id` in the `else` block of your `if` statement.
 
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*playSong\(userData\?\.currentSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*playSong\(\s*userData\?\.currentSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -627,7 +627,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
index c3d38a06e24..aa57c3f7fb0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
@@ -28,13 +28,13 @@ assert.isFunction(pauseSong)
 Your `pauseSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `pauseSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
index 329c39c9044..e24e87781b2 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
@@ -9,15 +9,17 @@ dashedName: step-38
 
 To store the current time of the song when it is paused, set the `songCurrentTime` of the `userData` object to the `currentTime` of the `audio` variable.
 
+*Note*: You should not use optional chaining for this step because `userData.songCurrentTime` will not be `null` or `undefined` at this point.
+
 # --hints--
 
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
-You should set `userData.songCurrentTime` to `audio.currentTime`.
+You should assign `audio.currentTime` to `userData.songCurrentTime`.
 
 ```js
 assert.match(code, /userData\.songCurrentTime\s*=\s*audio\.currentTime;?/)
@@ -618,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
index 41074201a2d..ab306a1211e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
@@ -16,19 +16,19 @@ To finally pause the song, use the `pause()` method on the `audio` variable. `pa
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `classList` property and the `remove()` method to remove the class `playing` from the `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.remove\(('|")playing\1\);?/)
+assert.match(code, /playButton\.classList\.remove\(\s*('|")playing\1\s*\);?/)
 ```
 
 You should use the `pause()` method on your `audio` variable.
 
 ```js
-assert.match(code, /audio\.pause\(\)/)
+assert.match(code, /audio\.pause\(\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
index b857f967b98..33ee52cc542 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
@@ -22,13 +22,13 @@ assert.match(code, /pauseButton\.addEventListener\(/)
 O "ouvinte" de evento deve "ouvir" o evento de `click`.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `pauseSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1,\s*pauseSong\)/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1,\s*pauseSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
index 45850e4e28e..19a9b878a01 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
@@ -16,13 +16,13 @@ To finally play the song, use the `play()` method on the `audio` variable. `play
 You should use the `classList` property and the `add` method to add the class `playing` to `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.add\(("|')playing\1\);?/)
+assert.match(code, /playButton\.classList\.add\(\s*("|')playing\1\s*\);?/)
 ```
 
 You should use the `play()` method on the `audio` variable.
 
 ```js
-assert.match(code, /audio\.play\(\);?/)
+assert.match(code, /audio\.play\(\s*\);?/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
 
   userData.currentSong = song;
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
index 12bef1a1051..986e38255ff 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
@@ -28,13 +28,13 @@ assert.isFunction(playNextSong)
 Your `playNextSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playNextSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
index 25a124700db..026a52c8e6a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
@@ -9,30 +9,30 @@ dashedName: step-44
 
 Inside the `playNextSong` function, create an `if` statement to check if the `currentSong` of `userData` is strictly equal to `null`. This will check if there's no current song playing in the `userData` object.
 
-If the condition is true, call the `playSong` function with the `id` of the first song in the `userData.songs` array as an argument.
+If the condition is true, call the `playSong` function with the `id` of the first song in the `userData?.songs` array as an argument.
 
 # --hints--
 
 You should not modify the existing `playNextSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside the `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
index 2120be48b85..fa94548e9a1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
@@ -14,25 +14,25 @@ Add an `else` block to the `if` statement. Inside the `else` block, call the `ge
 You should not modify the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` to the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 You should set the `currentSongIndex` constant to `getCurrentSongIndex()` inside the `else` block.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*\}/)
 ```
 
 
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -678,7 +678,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
index cd61c051b2b..1121aa159dc 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
@@ -18,25 +18,25 @@ Lastly, call the `playSong` function and pass in `nextSong.id` as the argument.
 You should not modify the existing `if` statement, its `else` block, and content.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex + 1]` to a `nextSong` constant.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `nextSong.id`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*playSong\(nextSong\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*playSong\(\s*nextSong\.id\s*\);?\s*\}/)
 ```
 
 
@@ -635,7 +635,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
index 765436cd735..164c0c626c8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
@@ -22,13 +22,13 @@ assert.match(code, /nextButton\.addEventListener\(/)
 O "ouvinte" de evento deve "ouvir" o evento de `click`.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playNextSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1,\s*playNextSong\)/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1,\s*playNextSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -675,7 +675,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
index 431a4a8289f..97dcb61fa9d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
@@ -26,13 +26,13 @@ assert.isFunction(playPreviousSong)
 Your `playPreviousSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playPreviousSong` function should be empty.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
index 577c234a0e3..525e88561dc 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
@@ -16,31 +16,31 @@ Inside the `else` block, create a constant named `currentSongIndex` and assign i
 You should not alter the existing `playPreviousSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should have an `if` statement with the condition `userData?.currentSong === null` inside your `playPreviousSong` function.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*/)
 ```
 
 You should have `return` inside the block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
 ```
 
 You should call `getCurrentSongIndex` and assign it to `currentSongIndex` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -695,7 +695,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
index b6347271070..317892acb8a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
@@ -14,19 +14,19 @@ To get the previous song, subtract `1` from the `currentSongIndex` of `userData?
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex - 1]` to a `previousSong` constant.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `previousSong.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*playSong\(previousSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*playSong\(\s*previousSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
index dc489b05b6f..07052485d59 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
@@ -20,13 +20,13 @@ assert.match(code, /previousButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playPreviousSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1,\s*playPreviousSong\)/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1,\s*playPreviousSong\s*\)/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
index 271d9b375b0..1c1e411d6a0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
@@ -28,19 +28,19 @@ assert.isFunction(highlightCurrentSong)
 Your `highlightCurrentSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*/)
 ```
 
 You should create a `playlistSongElements` constant inside your `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
 ```
 
 You should use the `querySelectorAll()` method to select the `.playlist-song` element and assign it to the `playlistSongElements` constant.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*\};?/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
index ef42ec46a06..305570ed9c9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
@@ -22,7 +22,7 @@ assert.isFunction(getCurrentSongIndex);
 Your `getCurrentSongIndex` function should use arrow syntax.
 
 ```js
-assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\)\s*=>\s*{\s*}\s*/);
+assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*/);
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
index 10bf34b9ad3..4223a437772 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
@@ -16,7 +16,7 @@ Use `getElementById()` to get the `id` of the currently playing song, then use t
 You should not modify the existing `highlightCurrentSong` function and its content.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*/)
 ```
 
 You should use `document.getElementById()` and pass in `` `song-${userData?.currentSong?.id}` ``.
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -692,7 +692,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
index 3db4bbff2c8..93cf75a7cc6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
@@ -33,13 +33,13 @@ assert.match(code, /playlistSongElements\.forEach\(/)
 Your `forEach()` method should have a `songEl` parameter and use arrow syntax.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*/)
 ```
 
 Your `forEach` should have an empty pair of curly braces.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -637,7 +637,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
index c4b3522d9e0..10bc4f654c2 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
@@ -16,19 +16,19 @@ Create an `if` statement with the condition `songToHighlight`. For the statement
 You should create an `if` statement with the condition `songToHighlight`.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*/)
 ```
 
 You should use the `setAttribute()` method on `songToHighlight` inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(/)
 ```
 
 You should pass in `"aria-current"` and `"true"` as the first and second argument of your `setAttribute` method.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\)\s*;?\s*\}?/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\s*\)\s*;?\s*\}?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
index 530e79185bf..d2880f5e155 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
@@ -16,7 +16,7 @@ After that, play around with the control buttons to see how the `highlightCurren
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /highlightCurrentSong\(\)/)
+assert.match(code, /highlightCurrentSong\(\s*\)/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -688,7 +688,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
index 3096575e206..116415a59f6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
@@ -26,13 +26,13 @@ assert.isFunction(setPlayerDisplay)
 Your `setPlayerDisplay` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayerDisplay` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
index 37591623e73..f3275556fa6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
@@ -16,31 +16,31 @@ Access the `#player-song-title` and `#player-song-artist` elements with the `get
 You should not modify the existing `setPlayerDisplay` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use `document.getElementById()` to get the `#player-song-title` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should assign the `#player-song-title` element to the variable `playingSong`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should use `document.getElementById()` to get the `#player-song-artist` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 You should assign the `#player-song-artist` element to the variable `songArtist`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -716,7 +716,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
index c4b893e84b9..b479bfe1ea3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -710,7 +710,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
index 44a88842a92..347edf1a073 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -725,7 +725,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
index 3d81363c455..3bd3c573cf1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
@@ -16,7 +16,7 @@ Now you should see the song title and the artist show up in the display.
 You should call the `setPlayerDisplay` function inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayerDisplay\(\);?/)
+assert.match(code, /setPlayerDisplay\(\s*\);?/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
index df2cdfa0f67..e9291268b09 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
@@ -28,13 +28,13 @@ assert.isFunction(setPlayButtonAccessibleText)
 Your `setPlayButtonAccessibleText` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayButtonAccessibleText` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -719,7 +719,7 @@ const renderSongs = (array) => {
 
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
index f5ae72573d3..08b301935bc 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
@@ -16,19 +16,19 @@ Don't forget to use optional chaining.
 You should not modify the existing `setPlayButtonAccessibleText` and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should access `userData?.currentSong` or `userData?.songs[0]`.
 
 ```js
-assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 You should assign `userData?.currentSong || userData?.songs[0]` to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -715,7 +715,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
index 60aaf15340a..e9de41bb633 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
@@ -16,7 +16,7 @@ Don't forget you need template interpolation here, so you need to use backticks.
 You should not modify the existing `setPlayButtonAccessibleText` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `setAttribute()` method on `playButton`.
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
index 7ae7cc0113e..8c510df72e8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
@@ -14,7 +14,7 @@ Now, call the `setPlayButtonAccessibleText` function inside the `playSong` funct
 You should call the `setPlayButtonAccessibleText` inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayButtonAccessibleText\(\);?/)
+assert.match(code, /setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -707,7 +707,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
index fe3383b9da7..9c7e4c62e63 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
@@ -28,13 +28,13 @@ assert.isFunction(shuffle)
 Your `shuffle` function should use an arrow syntax and should not take a parameter.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `shuffle` function  should be empty.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -729,7 +729,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
index 19644123eaa..86ffbc9c3e4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
@@ -24,7 +24,7 @@ Use the `sort()` method on the `userData?.songs` array. Pass a callback to the m
 You should not modify the existing `shuffle` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*{\s*[\s\S]*?\};?/);
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*{\s*[\s\S]*?\};?/);
 ```
 
 You should use the `sort()` method on `userData?.songs`.
@@ -42,7 +42,7 @@ assert.match(code, /userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*/)
 The callback of your `sort()` method should return `Math.random() - 0.5`.
 
 ```js
-assert.match(code, /userData\?.songs\.sort\s*\(\(\)\s*=>(\s*{\s*return\s+Math\.random\(\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\)\s*-\s*0\.5\s*)\);?/);
+assert.match(code, /userData\?.songs\.sort\s*\(\s*\(\s*\)\s*=>(\s*{\s*return\s+Math\.random\(\s*\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\s*\)\s*-\s*0\.5\s*)\s*\);?/);
 ```
 
 # --seed--
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -739,7 +739,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
index ca908e4ad91..c2f9f496c09 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
@@ -11,6 +11,8 @@ When the shuffle button is pressed, you want to set the `currentSong` to nothing
 
 Set `userData.currentSong` to `null` and `userData.songCurrentTime` to `0`.
 
+*Note*: You should not use optional chaining for this step because you are explicitly setting the `currentSong` and `songCurrentTime` properties to be `null` and `0` respectively.
+
 # --hints--
 
 You should set `userData.currentSong` to `null`.
@@ -620,7 +622,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -720,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
index 775850d6445..da444dbec1b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
@@ -16,31 +16,31 @@ Call the `renderSongs` function and pass in `userData?.songs` as an argument. Al
 You should not modify the existing `shuffle` function and its content.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -741,7 +741,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
index 059a45bb110..fdeb81ea315 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
@@ -22,13 +22,13 @@ assert.match(code, /shuffleButton\.addEventListener\(/)
 O "ouvinte" de evento deve "ouvir" o evento de `click`.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 You should pass in `shuffle` as the second value of your `click` event listener.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1,\s*shuffle\);?/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1,\s*shuffle\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
index 17e873de910..e0a57f23176 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -746,7 +746,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
index 340110c8714..133937cadee 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
@@ -7,7 +7,7 @@ dashedName: step-73
 
 # --description--
 
-Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData.songs` array.
+Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData?.songs` array.
 
 The `filter` method keeps only the elements of an array that satisfy the callback function passed to it:
 
@@ -20,12 +20,14 @@ console.log(numsGreaterThanThree) // Output: [10, 8, 4, 5]
 
 Use the `filter()` method on `userData?.songs`. Pass in `song` as the parameter of the arrow function callback and use implicit return to check if `song.id` is strictly not equal to `id`. Assign all of that to the `userData.songs`.
 
+*Note*: You should not use optional chaining when you assign the result of  `userData?.songs.filter` to `userData.songs` because the `allSongs` array will not be `undefined` or `null` at that point.
+
 # --hints--
 
 You should not modify the existing `deleteSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should use the `filter()` method on `userData?.songs`.
@@ -647,7 +649,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -757,7 +759,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
index 05fcb356aa1..1a00ad01520 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
@@ -18,25 +18,25 @@ After that, call the `highlightCurrentSong` function to highlight the current so
 You should not modify the existing `deleteSong` function and its content.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -634,7 +634,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -745,7 +745,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
index 72cad058374..97211f310ed 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
@@ -16,7 +16,7 @@ Use an `if` statement to check if the `userData?.currentSong?.id` is equal to th
 You should create an empty `if` statement with the condition `userData?.currentSong?.id === id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
index 8f9dc58ac3d..4c3d4d78831 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
@@ -16,31 +16,31 @@ After that, call the `pauseSong()` function to stop the playback and the `setPla
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.currentSong` to `null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.songCurrentTime` to `0`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*.*\s*\}/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -755,7 +755,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
index e55c5d4d046..776daa4da9e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
@@ -9,14 +9,14 @@ dashedName: step-78
 
 Next, you need to check if the playlist is empty. If it is, you should reset the `userData` object to its original state.
 
-Use an `if` statement to check if the `userData.songs` has a length of `0`.
+Use an `if` statement to check if the `userData?.songs` has a length of `0`.
 
 # --hints--
 
-You should create an empty `if` statement with the condition `userData.songs.length === 0`
+You should create an empty `if` statement with the condition `userData?.songs.length === 0`.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -738,7 +738,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
index 6a3c226e817..9013e76ca4a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
@@ -33,19 +33,19 @@ Inside your `if` statement, declare a `resetButton` constant, then use `createEl
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*.*\s*\}/)
 ```
 
 You should use the `createElement` method to create a `button`.
 
 ```js
-assert.match(code, /document\.createElement\(('|")button\1\);?/)
+assert.match(code, /document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 You should assign your newly created `button` element to a `resetButton` constant.
 
 ```js
-assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?/)
+assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 # --seed--
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -708,7 +708,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
 
   }
 --fcc-editable-region--
@@ -769,7 +769,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
index cf522d69d2b..ca439e18a81 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
@@ -18,7 +18,7 @@ Set the `id` attribute of `resetButton` to `reset` and its `aria-label` attribut
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should use `resetButton.id` to create an `id` attribute named `reset` for the `resetButton`.
@@ -628,7 +628,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
index 97a00c2e16e..d2cfc7efc4b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
@@ -32,7 +32,7 @@ assert.match(code, /resetButton\.appendChild\(/)
 You should pass in `resetText` as the value of your first `appendChild()`.
 
 ```js
-assert.match(code, /resetButton\.appendChild\(resetText\);?/)
+assert.match(code, /resetButton\.appendChild\(\s*resetText\s*\);?/)
 ```
 
 You should use the `appendChild()` method on `playlistSongs`.
@@ -44,7 +44,7 @@ assert.match(code, /playlistSongs\.appendChild\(/)
 You should pass in `resetButton` as the value of your second `appendChild()`.
 
 ```js
-assert.match(code, /playlistSongs\.appendChild\(resetButton\);?/)
+assert.match(code, /playlistSongs\.appendChild\(\s*resetButton\s*\);?/)
 ```
 
 # --seed--
@@ -642,7 +642,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -773,7 +773,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
index 3cfd28dcb66..84eeecd031e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
@@ -22,13 +22,13 @@ assert.match(code, /resetButton\.addEventListener\(/)
 Your `resetButton` event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 The callback function of your event listener should use arrow syntax and have an empty pair of curly braces.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -690,7 +690,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -760,7 +760,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
index c0c8b18d8fb..ad76fe27588 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
@@ -7,22 +7,22 @@ dashedName: step-84
 
 # --description--
 
-You need to assign the `userData.songs` property to the initial `allSongs` array. This will reset the playlist to its original state.
+To reset the playlist to its original state, spread `allSongs` into an array and assign it to `userData.songs`.
 
-Spread `allSongs` into an array and assign it to `userData.songs`.
+*Note*: You should not use optional chaining for the `userData.songs` because the song will not be `null` or `undefined` at this point.
 
 # --hints--
 
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\s*\);?/)
 ```
 
 You should assign `[...allSongs]` to `userData.songs`.
 
 ```js
-assert.match(code, /userData\.songs\s*=\s*\[\.\.\.allSongs\]/)
+assert.match(code, /userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -684,7 +684,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
index 0ae746269bf..ad5df2dc43a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
@@ -22,25 +22,25 @@ Remove the reset button from the playlist by calling the `remove()` method on th
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*.*\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*.*\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
 You should use the `remove()` method to remove the `resetButton` from the DOM.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*resetButton\.remove\(\);?\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*resetButton\.remove\(\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -702,7 +702,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -776,7 +776,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
index 2e624defa7e..c3378b0da7d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
@@ -24,13 +24,13 @@ assert.match(code, /audio\.addEventListener\(/)
 The event listener you used on on your `audio` variable should listen for an `ended` event.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback to your `ended` event listener.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 
@@ -629,7 +629,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -768,7 +768,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
index 34fa7ea64cc..9d78578b9b5 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
@@ -7,14 +7,14 @@ dashedName: step-77
 
 # --description--
 
-Within the button element in the `renderSongs` function, add an `onclick` attribute as the first attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
+Within the button element in the `renderSongs` function, add an `onclick` attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
 
 # --hints--
 
-You should add an `onclick` attribute as the first attribute of the delete button and pass in `deleteSong(${song.id})`.
+You should add an `onclick` attribute to the delete button and pass in `deleteSong(${song.id})`.
 
 ```js
-assert.match(code, /<button\s+onclick=('|")deleteSong\(\$\{song\.id\}\)\1\s*class=('|")playlist-song-delete\2\s*aria-label=('|")Delete\s*\$\{song\.title\}\3\s*>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")deleteSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
index 9dde6357cfe..04e11190623 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
@@ -7,30 +7,35 @@ dashedName: step-87
 
 # --description--
 
-Notice that the album art in the HTML and songs in the `allSongs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
+Notice that the album art in the HTML and songs in the `userData.songs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
 
 Next, you need to check if there is a next song to play. Retrieve the current song index by calling the `getCurrentSongIndex()` function, and save it in a `currentSongIndex` constant.
 
-After that, create a `nextSongExists` constant that checks if a next song exists.
+After that, create a `nextSongExists` constant that contains the boolean value `true` or `false` depending on if the next song exists.
 
 # --hints--
 
 You should not modify the existing `ended` event listener and its content.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should create a `currentSongIndex` constant and set it to the calling of the `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
-You should check if a next song exists with `userData?.songs[currentSongIndex + 1] !== undefined` and set it to a `nextSongExists` constant.
+You should check if a next song exists comparing `userData.songs.length` and `currentSongIndex` and set it to a `nextSongExists` constant. If the last index of the songs array (`userData.songs.length - 1`) is bigger than the currentSongIndex that means there is a next song.
 
 ```js
-assert.match(code, /const\s+nextSongExists\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\]\s*!==\s*undefined;?/)
+const secondPart = code.split(`audio.addEventListener("ended", () => {`)[1];
+const middlePart = secondPart.split("});")[0]
+const codeOutputFirstTest = eval(middlePart + "\nnextSongExists;");
+assert.strictEqual(codeOutputFirstTest, true);
+const codeOutputSecondTest = eval(`\nfunction getCurrentSongIndex() { return 100; };\n` + middlePart + "\nnextSongExists;")
+assert.strictEqual(codeOutputSecondTest, false);
 ```
 
 # --seed--
@@ -593,7 +598,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -657,7 +662,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -732,7 +737,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
index c14a6105cff..11c2436c0fe 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
@@ -14,13 +14,13 @@ Use an `if` statement to check if `nextSongExists` exists, then call the `playNe
 You should create an `if` statement with the condition `nextSongExists`.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*/)
 ```
 
 You should call the `playNextSong` function inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -583,7 +583,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -647,7 +647,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
index 6bb85ebe729..0d13c747635 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
@@ -14,25 +14,25 @@ If there is no next song in the playlist, use the `else` block to reset the `cur
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `currentSong` property of `userData` to `null` in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `songCurrentTime` property of `userData` to `0` in the `else` block of your `if`statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
 ```
 
 # --seed--
@@ -595,7 +595,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -659,7 +659,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
index a8b2bef70c1..67ec3cebbb1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
@@ -17,28 +17,28 @@ You should call the `pauseSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /pauseSong\(\);?/)
+assert.match(splitter[1], /pauseSong\(\s*\);?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /setPlayerDisplay\(\);?/)
+assert.match(splitter[1], /setPlayerDisplay\(\s*\);?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -636,7 +636,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -775,7 +775,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
@@ -1418,7 +1418,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -1482,7 +1482,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -1557,7 +1557,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
index b6935d2f3ea..925235c6e03 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
@@ -26,7 +26,7 @@ Inside the `userData` object create a `songs` property. For the value, spread `a
 Your `userData` object should have a `songs` key set to `[...allSongs]`.
 
 ```js
-assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\],?/);
+assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\]\s*,?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
index 936af7af501..584dd1e989b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
@@ -14,7 +14,7 @@ To handle the current song's information and track its playback time, create a `
 You should not modify the existing `userData` object and its content.
 
 ```js
-assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\.\.\.allSongs\],?\s*/);
+assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\s*\.\.\.allSongs\s*\]\s*,?\s*/);
 ```
 
 Your `userData` object should have a `currentSong` key set to `null`.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
index ca92b3f88dd..0b934ae717c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
@@ -9,26 +9,26 @@ dashedName: step-30
 
 Add an `else` block to handle the current song's position in the playlist.
 
-Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData.songCurrentTime`.
+Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData?.songCurrentTime`.
 
 # --hints--
 
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 You should add an `else` block to the existing `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
 ```
 
-You should set `audio.currentTime` to `userData.songCurrentTime` inside the `else` block of your `if` statement.
+You should set `audio.currentTime` to `userData?.songCurrentTime` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\.songCurrentTime;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\?\.songCurrentTime;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
index 5ee9604f1ef..1cee8989f37 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
@@ -20,7 +20,7 @@ assert.match(code, /playlistSongElements\.forEach\(\s*(\(\s*songEl\s*\)|songEl)\
 You should use the `removeAttribute()` method on `songEl` and pass in `"aria-current"`.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(('|")aria-current\1\);?\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(\s*('|")aria-current\1\s*\);?\s*\}\s*\);?/)
 ```
 
 
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -691,7 +691,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
index 1bab4eb1f31..147d69bcc09 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
@@ -13,10 +13,10 @@ Don't forget you need to interpolate with the dollar sign here.
 
 # --hints--
 
-You should add an `onclick` with the value `playSong(${song.id})` as the second attribute and value of the `button` element.
+You should add an `onclick` attribute with the value `playSong(${song.id})` to the `button` element.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-info\1\s*onclick\s*=\s*('|")playSong\(\$\{song\.id\}\)\2\s*>\s*<span\s+class\s*=\s*('|")playlist-song-title\3\s*>\$\{song\.title\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-artist\4\s*>\$\{song\.artist\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-duration\5\s*>\$\{song\.duration\}<\/span>\s*<\/button>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")playSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
index 87cbcad95c7..2a92c49bff0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
@@ -28,19 +28,19 @@ Use the `createTextNode()` method to create a `Reset Playlist` text, then assign
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*\}/)
 ```
 
 You should use `document.createTextNode()` to create a `Reset Playlist` text.
 
 ```js
-assert.match(code, /document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 You should assign your created text node to a `resetText` constant.
 
 ```js
-assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -703,7 +703,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
 
 
@@ -766,7 +766,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
index 73f98a21945..d8f6764e433 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
@@ -23,13 +23,13 @@ Pass in a callback function to the `map()` method. The callback function should
 The callback function of your `map()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?.*\)?\s*=>\s*\{\s*\}\)/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(.*\)|[^()]+)\s*=>\s*\{\s*\}\s*\)/)
 ```
 
 Your `map()` method should have a `song` parameter in it's callback function.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?song\)?/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
index 629180fccfd..8f196e3dcce 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
@@ -14,20 +14,20 @@ const animals = ["dog", "cat", "horse"];
 animals.indexOf("cat") // 1
 ```
 
-Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData.currentSong`.
+Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData?.currentSong`.
 
 # --hints--
 
 You should return `userData?.songs.indexOf()` inside your `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\()|(\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(|\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
 ```
 
-You should pass in `userData.currentSong` into the `indexOf()` method.
+You should pass in `userData?.currentSong` into the `indexOf()` method.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\(userData\.currentSong\);?)|(\s*{\s*return\s+userData\?\.songs\.indexOf\(userData\.currentSong\);?)/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?|\s*{\s*return\s+userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?\s*})/)
 ```
 
 # --seed--
@@ -625,7 +625,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
index 5016f268835..b9cd9b992b1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
@@ -23,7 +23,7 @@ Add the `sort()` method to `userData?.songs`.
 You should add the `sort()` method to `userData?.songs`.
 
 ```js
-assert.match(code, /userData\?\.songs\.sort\(*.\);?/);
+assert.match(code, /userData\?\.songs\.sort\(.*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
index 66f5cbf6690..7faed5e1c4a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
@@ -18,25 +18,25 @@ As variáveis não mudarão, então use `const` para declará-las.
 Você deve usar `document.getElementById()` para obter o elemento `#author-container`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 Você deve atribuir o elemento `#author-container` à variável `authorContainer`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 Você deve usar `document.getElementById()` para obter o elemento `#load-more-btn`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 Você deve atribuir o elemento `#load-more-btn` à variável `loadMoreBtn`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
index 0a887815463..bc31f5f04ac 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
@@ -22,13 +22,13 @@ Faça uma solicitação de `GET` para este URL: `https://cdn.freecodecamp.org/cu
 Você deve usar o método `fetch()` para fazer uma solicitação de `GET` para `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Você não deve ter um ponto-e-vírgula após a chamada de `fetch`.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
index 5d27a2caf7d..363b49a8956 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
@@ -27,37 +27,37 @@ Novamente, não termine o código com um ponto-e-vírgula ainda.
 Você deve usar o método `fetch()` para fazer uma solicitação de `GET` para `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Você deve encadear o método `.then()` à sintaxe de `fetch`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(/)
 ```
 
 Você deve adicionar um parâmetro `res` ao método `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
 ```
 
 O método `.then()` deve usar a sintaxe das arrow functions.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
 ```
 
 Você deve registrar o parâmetro `res` no console para poder ver o objeto `Response` usando console.log().
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 Você não deve ter um ponto-e-vírgula depois da chamada de `.then()`.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
index d01c1e4d1e6..f70327dc8bb 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
@@ -16,19 +16,19 @@ Remova `console.log(res)` e retorne implicitamente `res.json()` em seu lugar.
 Você deve remover a chamada a `console.log(res)`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*console\.log\(res\)\)/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 Você deve retornar implicitamente `res.json()` no `.then()`.
 
 ```js
-assert.match(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\)/)
+assert.match(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)/)
 ```
 
 Você não deve ter um ponto-e-vírgula depois da chamada de `.then()`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\);/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\);/)
 ```
 
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
index c676e77dc52..c295651e0c5 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
@@ -17,7 +17,7 @@ Encadeie outro `.then()` ao método `.then()` existente. Desta vez, passe `data`
 Você deve usar o método `fetch()` para fazer uma solicitação de `GET` para `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 O primeiro `.then()` não deve ter um ponto e vírgula.
@@ -29,37 +29,37 @@ assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*
 Você deve encadear outro `.then()` ao método `.then()` existente.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 Você deve adicionar um parâmetro `data` ao segundo método `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 O segundo método `.then()` deve usar a sintaxe das arrow functions.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 O segundo método `.then()` deve ter chaves.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 O segundo método `.then()` deveria registrar `data` no console usando console.log().
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
 ```
 
 O segundo `.then()` não deve ter um ponto e vírgula.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
index e6804e19bd5..348be049867 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
@@ -18,67 +18,67 @@ Encadeie `.catch()` ao último `.then()`. Passe uma função de callback com `er
 Você deve usar o método `fetch()` para fazer uma solicitação de `GET` para `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Você deve encadear outro `.then()` ao método `.then()` existente.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 Você deve adicionar um parâmetro `data` ao segundo método `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 O segundo método `.then()` deve usar a sintaxe das arrow functions.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 O segundo método `.then()` deve ter chaves.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 O segundo método `.then()` deveria registrar `data` no console usando console.log().
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)/)
 ```
 
 O segundo `.then()` não deve ter um ponto-e-vírgula.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\);/)
 ```
 
 Você deve encadear o método `.catch()` no segundo `.then()` que você já tem.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
 ```
 
 Você deve adicionar um parâmetro `err` ao método `.catch()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
 ```
 
 O método `.catch()` deve usar a sintaxe das arrow functions.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
 ```
 
 Your `.catch()` method should use `console.error()` to log `err` to the console with the text `` `There was an error: ${err}` ``. Não se esqueça de usar as crases no início e no fim da string.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\)\s*;?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
index 1eb743b2e2c..96f59a1829c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
@@ -48,7 +48,7 @@ assert.match(code, /let\s+authorDataArr/)
 Você deve definir a variável `authorDataArr` como um array vazio (`[]`).
 
 ```js
-assert.match(code, /let\s+authorDataArr\s*=\s*\[\];?/)
+assert.match(code, /let\s+authorDataArr\s*=\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
index ac0b639ca70..1fe698660f7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
@@ -14,7 +14,7 @@ Dentro da função `displayAuthors`, encadeie `.forEach()` a `authors`.
 Você deve encadear `.forEach()` a `authors`.
 
 ```js
-assert.match(code, /authors\.forEach\(\)/)
+assert.match(code, /authors\.forEach\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
index 5580797d789..ff9471243db 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
@@ -34,7 +34,7 @@ assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*/)
 A função de callback deve estar vazia.
 
 ```js
-assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\)\s*=>\s*\{\s*\}\s*\);?/)
+assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
index 97890969565..c9d879aa58c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
@@ -16,7 +16,7 @@ Primeiro, remova a instrução do `console.log()`. Em seguida, atribua `data` à
 Você deve remover o registro do console que mostra `data`.
 
 ```js
-assert.notMatch(code, /console\.log\(data\);/)
+assert.notMatch(code, /console\.log\(\s*data\s*\);/)
 ```
 
 Você deve atribuir `data` à variável `authorDataArr`.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
index d0905c0c010..a3e59b61081 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
@@ -22,19 +22,19 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 Você deve ter um registro do console com o texto `Author Data Array:`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1/)
 ```
 
 Você deve usar a vírgula para separar o texto `Author Data Array:` de `authorDataArr`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,/)
 ```
 
 `authorDataArr` should be the second argument of your console log statement.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
index dbe3a0faac5..57df2b09b7c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
@@ -22,7 +22,7 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 Você deve remover a instrução do console.log() mostrando `authorDataArr`
 
 ```js
-assert.notMatch(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.notMatch(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 Você deve chamar a função `displayAuthors`.
@@ -34,19 +34,19 @@ assert.match(code, /displayAuthors\(/)
 Você deve chamar a função `displayAuthors` e passar um argumento `authorDataArr.slice()`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 O primeiro parâmetro do método `slice()` deve ser `startingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 O primeiro parâmetro do método `slice()` deve ser `endingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\);?/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
index 8e92a47b59f..b9c74c8ebe8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
@@ -34,13 +34,13 @@ assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*/)
 A função `fetchMoreAuthors` deve usar a sintaxe das arrow functions.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 A função `fetchMoreAuthors` deve estar vazia.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*\{\s*\}/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
index d5b9abe2dd7..d15313fc4f1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
@@ -24,21 +24,21 @@ Você deve chamar a função `displayAuthors` e passar um argumento `authorDataA
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first argument of your `slice()` method should be `startingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second argument of your `slice()` method should be `endingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\)/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
index f9dab0ebc64..dc21039f748 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
@@ -24,13 +24,13 @@ assert.match(code, /loadMoreBtn\.addEventListener\(/)
 O "ouvinte" de evento deve "ouvir" o evento de `click`.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 O "ouvinte" do evento deve receber `fetchMoreAuthors` como a função para ser executada.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1,\s*fetchMoreAuthors\);?/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1,\s*fetchMoreAuthors\s*\);?/)
 ```
 
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
index 488f2bc9c97..03996e3216b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
@@ -24,13 +24,13 @@ assert.match(code, /if\s*\(/)
 A instrução `if` deve receber o parâmetro `authorDataArr.length <= endingIndex` como sua condição.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*/)
 ```
 
 A instrução `if` deve estar vazia.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
index bc5c86ea54b..6a2fc11e0da 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
@@ -28,22 +28,21 @@ assert.match(code, /<p\s*class=("|')bio\1>/);
 Você deve verificar se o comprimento do texto de `bio` é maior que `50`.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50/)
+assert.match(code, /<p\s*class=("|')bio\1>\s*\$\{\s*bio\.length\s*>\s*50/)
 ```
 
 Se o texto de `bio` for maior que `50` caracteres, você deve extrair os primeiros 50 caracteres com `slice()` e substituir o resto por `...`. Não se esqueça de que os índices começam de zero.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:/);
 ```
 
 Se o texto da `bio` for menor que 50 caracteres, use o texto da `bio` diretamente.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:\s*bio\s*\}<\/p>/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:\s*bio\s*\}\s*<\/p>/);
 ```
 
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
index 74f87bded41..ffd4d1236bb 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
@@ -16,7 +16,7 @@ Dentro do `.catch()`, remova `console.error()` e defina o `innerHTML` de `author
 Você deve remover a instrução `console.error` e seu texto.
 
 ```js
-assert.notMatch(code, /console\.error\(`There\s+was\s+an\s+error:\s+\$\{err\}`\);/)
+assert.notMatch(code, /console\.error\(\s*`There\s+was\s+an\s+error:\s+\$\{err\}`\s*\);/)
 ```
 
 Você deve acessar o `innerHTML` de `authorContainer` e defini-lo como um elemento `p`. Não se esqueça de cercar o elemento `p` com uma template literal.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
index d6cf3689412..be1b8dcea31 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
@@ -96,19 +96,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
index 4f086439ad7..508c260b4db 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
@@ -120,19 +120,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
index 30d89359d32..116ab77f2dd 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
@@ -111,19 +111,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
index 1108ef63bd1..6a5cecf7328 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
index b46b28c974f..d392a73ad78 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
@@ -7,8 +7,9 @@ dashedName: step-5
 
 # --description--
 
-Agora, crie um `fieldset` com um `id` definido como `lunch` e elementos `legend` e `div` correspondentes.
+Next, create a `fieldset` element with the `id` set to `lunch`.
 
+Within that element, create a `legend` element with the text `Lunch`, and an empty `div` with the `class` set to `input-container`.
 # --hints--
 
 Você deve criar um segundo elemento `fieldset` no `form`.
@@ -138,19 +139,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
index 3b9b59fcd3b..8465b7c8a9e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
index 80e8937899a..34848ebb35a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
@@ -188,19 +188,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
index d66d35425b9..727e306cffd 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
index d2d279e6dfa..692b271d216 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
@@ -190,19 +190,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
index 1618ecde00a..aaea4b56b98 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
@@ -196,19 +196,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
index 5a8b6abe10b..d41059b82a0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
index 56086f9fd99..681336cb945 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
index c81f732bb48..42cc53192ea 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
index d5130f8af1b..f3920c151fe 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
@@ -29,13 +29,13 @@ Você deve criar uma variável chamada `calorieCounter`.
 assert.isDefined(calorieCounter);
 ```
 
-Você deve usar `document.getElementById()` para obter o elemento `#calorie-counter`.
+You should have `document.getElementById('calorie-counter')` in your code.
 
 ```js
 assert.match(code, /document\.getElementById\(\s*('|")calorie-counter\1\s*\)/g);
 ```
 
-Você deve armazenar o elemento `#calorie-counter` em uma variável chamada `calorieCounter`.
+You should assign `document.getElementById('calorie-counter')` to your `calorieCounter` variable.
 
 ```js
 assert.equal(calorieCounter, document.getElementById('calorie-counter'));
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
index cdfc362c64c..92bbaee307e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
index bac322d86f4..61aee07ea52 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
index 500f68fff69..38d3b40226a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
@@ -7,6 +7,13 @@ dashedName: step-17
 
 # --description--
 
+Em programação, costuma-se usar o prefixo `is` ou `has` em uma variável para mostrar que ela é do tipo booleano.
+
+```js
+let isRunning = true;
+let hasCompleted = false;
+```
+
 Declare uma variável `isError` e defina-a como `false`, mas use `let` para que você possa reatribuir seu valor mais tarde.
 
 # --hints--
@@ -148,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
index 57696e098e2..0aa0110b395 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
@@ -28,7 +28,7 @@ assert.isFunction(cleanInputString);
 Your `cleanInputString` function should take a `str` parameter.
 
 ```js
-assert.match(cleanInputString?.toString(), /\(str\)/);
+assert.match(cleanInputString?.toString(), /\(\s*str\s*\)/);
 ```
 
 `cleanInputString` deve ser uma função vazia.
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
index 4554b48f68e..fad6c966ed8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
index 4d26fe957b6..2bbb316a9d6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
index 9d31b07caa4..9bcf1a4275c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
index 4034eb0c6d9..a78d862c832 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
@@ -7,24 +7,26 @@ dashedName: step-22
 
 # --description--
 
-Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. Se não for, faça o `push` do caractere (em outras palavras, insira-o) em `cleanStrArray`.
-
 You will need to check if the array `["+", "-", " "]` does not include the current character. You can use a combination of the <dfn>includes()</dfn> method and the <dfn>!</dfn> operator to do this.
 
 The `.includes()` method returns `true` if the array contains the character, and `false` if not. The logical NOT operator (`!`) will return the opposite of the value of the `.includes()` method.
 
-Exemplo:
+Here is an example checking if the current character is not in the vowels array. If it is not, that current character is pushed into the `consonantArray`:
 
 ```js
-const numbersArray = [1, 2, 3, 4, 5]
-const number = 6
+const inputString = "Hello World";
+const charArray = inputString.split('');
+const consonantArray = [];
 
-if (!numbersArray.includes(number)) {
-  console.log("The number is not in the array.")
+for (let i = 0; i < charArray.length; i++) {
+  if (!['a', 'e', 'i', 'o', 'u'].includes(charArray[i])) {
+    consonantArray.push(charArray[i]);
+  }
 }
-
 ```
 
+Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. Se não for, faça o `push` do caractere (em outras palavras, insira-o) em `cleanStrArray`.
+
 # --hints--
 
 O laço `for` deve ter uma instrução `if`.
@@ -37,19 +39,19 @@ O laço `for` deve usar `!["+", "-", " "].includes()`.
 
 ```js
 // the loop protection injects code so we have to look at the raw code directly
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(/);
 ```
 
-O laço `for` deve conferir se `strArray[i]` é encontrado em `["+", "-", " "]`.
+Your `for` loop should see if `!["+", "-", " "].includes(strArray[i])`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?/);
 ```
 
 O laço `for` deve fazer o `push` de `strArray[i]` (inseri-lo) em `cleanStrArray`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\[i\]\s*\)\s*;?\s*(\s*\})?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*;?\s*(\s*\})?/);
 ```
 
 # --seed--
@@ -171,19 +173,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
index e6e5bd81f7d..b7a3efd2ad7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
@@ -168,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
index c8a8e32082b..ce69497e9db 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
index a6f63c234c2..4d197a964bf 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
index fbe2329baa3..276492c10e4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
index 1222c1a1f7f..89547d5597f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
index 3bef7f4148d..5e607755660 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
index e43a9eba269..279552aff67 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
index dc9a9abf6c4..ef8ce50022d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
index 04620a32ee2..eea7e037a9a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
index a42d6e7194a..bc621f04dcb 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
index a6f48c46196..7d601a6fcdd 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
index bdfb8695087..97e368d89e1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
index 423733d98c4..57c0b55b3b8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
@@ -6,8 +6,13 @@ dashedName: step-35
 ---
 
 # --description--
+As strings têm um método <dfn>.match()</dfn>, que aceita um argumento do tipo regex. `.match()` retornará um array de resultados de correspondência – contendo a primeira correspondência ou todas as correspondências, se a flag global for usada.
 
-As strings têm um método `.match()`, que recebe um argumento de expressão regular. `.match()` retornará um array de resultados de correspondência – contendo a primeira correspondência ou todas as correspondências, se a flag global for usada.
+```js
+const str = 'example string';
+const regex = /example/;
+const result = str.match(regex); // Returns ['example']
+```
 
 Retornar o resultado da chamada do método `.match()` em `str` e passando a variável `regex` como o argumento. Você usará o resultado dessa correspondência mais tarde.
 
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
index 5647e2aac4a..ae1958c8674 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
index cc079824327..542fa492fc7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
index 3d57dd4dc53..af8ae4b24ed 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
index 3377d0f2cae..2faeb43e7ff 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
@@ -26,13 +26,13 @@ Substitua a string concatenada no `querySelector` com um template literal – ce
 Você deve usar um template literal no método `querySelector`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`.*`\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`.*`\s*\)/);
 ```
 
 O template literal deve ter o valor `{targetId} .input-container`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`\$\{targetId\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`\$\{targetId\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
index 5fe20ac8fc4..f6bb2096a6d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
@@ -20,13 +20,13 @@ assert.notMatch(addEntry.toString(), /targetId\s*=/);
 Você deve substituir a referência a `targetId` no template literal por `entryDropdown.value`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 Você deve adicionar `#` ao início do template literal.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
index 340c8882299..e925b77f646 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
index 090878d63a5..7c5c771fae5 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
@@ -24,13 +24,13 @@ assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.query
 Você deve acessar a propriedade `length` de `querySelectorAll()`.
 
 ```js
-assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 A variável `entryNumber` deve ser a `length` de `querySelectorAll`.
 
 ```js
-assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 # --seed--
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
index 848752d6319..25e756a02ed 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
index 1bbec42d1da..a0a18b27729 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
@@ -20,7 +20,7 @@ assert.match(code, /HTMLString\s*=\s*`\n\s*<label>.*<\/label>/);
 O elemento `label` deve conter o texto `Entry ${entryNumber} Name`.
 
 ```js
-assert.match(code, /HTMLString\s*=\s*`\n\s*<label>Entry\s\$\{entryNumber\}\sName<\/label>/);
+assert.match(code, /HTMLString\s*=\s*`\n\s*<label>\s*Entry\s\$\{entryNumber\}\sName\s*<\/label>/);
 ```
 
 # --seed--
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
index 745e281b01c..223c16d767d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
index 1d0f010bc99..5ef403bdc2c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
index 4d8c802b069..c582ebd0f15 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
index 2483413afb3..9118af46923 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
@@ -185,19 +185,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
index b3bf97e0471..86e8ac3de84 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
@@ -172,19 +172,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
index da654654678..8c0f728ca1b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
index 08ce5dc2f5b..4e5cb97cc70 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
index 21672c92b9b..a60f175be4d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
@@ -146,19 +146,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
index c56e6f5dc54..57cd1ea3f47 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
index 12cd26ee0e1..73d82692a28 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
@@ -9,7 +9,25 @@ dashedName: step-50
 
 No projeto do Jogo de RPG, você aprendeu a definir o comportamento de um botão, editando a propriedade `onclick`. Você também pode editar o comportamento de um elemento adicionando um "ouvinte" de eventos.
 
-Chame o método `.addEventListener()` de `addEntryButton`. It takes two arguments. O primeiro é o evento a ser "ouvido" – você deve passar a string `click`. O segundo é a função de callback – a função que será executada quando o evento for acionado. Passe a função `addEntry` como o segundo argumento. Observe que você não deve *chamar* `addEntry` diretamente, apenas passar a variável (ou <dfn>referência da função</dfn>).
+O exemplo a seguir usa o método `addEventListener` para adicionar um evento de clique a um botão. Ao clicar no botão, a função `printName` é chamada.
+
+```html
+<button class="btn">Print name</button>
+```
+
+```js
+const button = document.querySelector('.btn');
+function printName() {
+  console.log("Jessica");
+}
+button.addEventListener('click', printName);
+```
+
+O método `addEventListener` recebe dois argumentos. O primeiro é o evento a ser "ouvido". (ex.: `'click'`) O segundo argumento é a função de callback, ou seja, a função que será executada quando o evento ocorrer.
+
+Chame o método `.addEventListener()` no `addEntryButton`. Use a string `click` para o primeiro argumento e a função `addEntry` para o segundo argumento.
+
+Observe que você não deve *chamar* `addEntry` diretamente, apenas passar a variável (ou <dfn>referência da função</dfn>).
 
 # --hints--
 
@@ -150,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
index 63874659c5f..81007cade9d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
index 9aa1b90d414..f431086bb2a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
@@ -7,34 +7,26 @@ dashedName: step-56
 
 # --description--
 
-O parâmetro `list` será o resultado de um seletor de consulta, que retornará uma `NodeList`. A `NodeList` é um tipo de array que contém os elementos que correspondem ao seletor de consulta.
+O parâmetro `list` será o resultado de um seletor de consulta, que retornará uma `NodeList`. A `NodeList` is a list of elements like an array. It contains the elements that match the query selector. You will need to loop through these elements in the list.
 
-Você precisará percorrer esses elementos. Então, comece criando um laço `for`. O iterador `i` deve começar em `0`, continuar enquanto for menor que o comprimento da lista, e incrementar em `1` a cada iteração.
+In previous steps, you learned how to loop through an array using a `for` loop. You can also use a <dfn>for...of</dfn> loop to loop through an array and a `NodeList`.
+
+A `for...of` loop is used to iterate over elements in an iterable object like an array. The variable declared in the loop represents the current element being iterated over.
+
+```js
+for (const element of elementArray) {
+  console.log(element);
+}
+```
+
+Create a `for...of` loop that loops through the list. For the loop's variable name, use `const` to declare a variable called `item`.
 
 # --hints--
 
-A função `getCaloriesFromInputs` deve ter um laço `for`.
+You should have a `for...of` loop that loops through the `list` parameter. Use `item` for the loop's variable name.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(/g);
-```
-
-O laço `for` deve inicializar uma variável chamada `i` como `0`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;/g);
-```
-
-O laço `for` deve ter uma condição que verifica se o valor de `i` é menor do que o comprimento de `list`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;/g);
-```
-
-O laço `for` deve incrementar `i` em `1` a cada vez que é executado. Use o operador de incremento para isso.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)/g);
+assert.match(code, /for\s*\(\s*const\s+item\s+of\s+list\s*\)\s*\{/);
 ```
 
 # --seed--
@@ -156,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
index 31c73116620..d1ccb4ba38d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
@@ -9,40 +9,20 @@ dashedName: step-57
 
 Os valores de `NodeList` que você passará para `list` consistirão em elementos `input`. Assim, você vai querer examinar o atributo `value` de cada elemento.
 
-Atribua o `value` (valor) do elemento em `list` no índice `i` a uma variável chamada `currVal`.
+Assign `item.value` to a `const` variable called `currVal`.
 
 # --hints--
 
-Você deve ter uma variável `currVal`.
+You should use `const` to declare a new variable called `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=/);
+assert.match(code, /const\s+currVal\s*=/);
 ```
 
-Você deve acessar o elemento de `list` no índice `i` usando a notação de colchetes.
+You should assign `item.value` to `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]/);
-```
-
-Você deve acessar o atributo `value` do elemento em `list` no índice `i`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]\.value/);
-```
-
-Você deve atribuir o `value` (valor) do elemento em `list` no índice `i` a uma variável chamada `currVal`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*list\[i\]\.value/);
-```
-
-A atribuição de `currVal` deve estar no laço `for`.
-
-```js
-// another hack, because the loop protection injects stuff
-const getCaloriesString = code.split("function getCaloriesFromInputs")[1];
-assert.match(getCaloriesString, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*(const|let)\s+currVal\s*=\s*list\[i\]\.value/g);
+assert.match(code, /const\s+currVal\s*=\s*item\.value/);
 ```
 
 # --seed--
@@ -164,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,15 +224,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
+  --fcc-editable-region--
+  for (const item of list) {
 
   }
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
index 6d90e78e584..1807bd6e7b4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
@@ -9,26 +9,26 @@ dashedName: step-58
 
 Você se lembra de ter escrito uma função antes para limpar a entrada do usuário? Você precisará usar essa função aqui.
 
-Atualize a declaração de `currVal` para que seja o resultado da chamada de `cleanInputString` com `list[i].value`.
+Update your `currVal` declaration to be the result of calling `cleanInputString` with `item.value`.
 
 # --hints--
 
-A função `getCaloriesFromInputs` deve chamar a função `cleanInputString`.
+You should call the `cleanInputString` function inside the `getCaloriesFromInputs` function.
 
 ```js
 assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(/);
 ```
 
-You should pass `list[i].value` as the argument for `cleanInputString`.
+You should pass `item.value` as the argument for `cleanInputString` function.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 Você deve atribuir o resultado da chamada de `cleanInputString` à variável `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(code, /const\s+currVal\s*=\s*cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -238,15 +231,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = list[i].value;
+  for (const item of list) {
+    --fcc-editable-region--
+    const currVal = item.value;
+    --fcc-editable-region--
   }
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
index 3803eacf7d4..1cd2bd5bf20 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -239,8 +232,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
 
   }
 }
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
index e3ebf3398d0..80910b727b7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,8 +244,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
index 6bdf72adb84..25db74d6681 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
@@ -23,13 +23,13 @@ Você deve usar um template literal para passar a mensagem `Invalid Input:` para
 
 ```js
 // because it transforms template literals...
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: /);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: /);
 ```
 
-Você deve usar a sintaxe das template literlas para exibir o primeiro valor do array `invalidInputMatch` após o texto `Invalid Input:`.
+You should display the first element of the `invalidInputMatch` array after the `Invalid Input:` text by using a template literal.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\)/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\)/);
 ```
 
 # --seed--
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
index 42620d0c113..0df71214754 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
@@ -7,6 +7,8 @@ dashedName: step-62
 
 # --description--
 
+In programming, `null` is meant to represent the absence of a value. In this case, if the user enters an invalid input, you want to alert them and then return `null` to indicate that the function has failed.
+
 Ainda dentro do bloco do `if`, defina `isError` como `true` e retorne `null`.
 
 # --hints--
@@ -14,13 +16,13 @@ Ainda dentro do bloco do `if`, defina `isError` como `true` e retorne `null`.
 Após o `alert`, você deve definir `isError` para `true`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true/);
 ```
 
 Após modificar `isError`, você deve usar `return` para retornar o valor `null`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
 ```
 
 # --seed--
@@ -142,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -233,8 +228,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
index ca31087dfdf..036d6514b93 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
@@ -17,6 +17,7 @@ Exemplo:
 
 ```js
 Number('10'); // returns the number 10
+Number('abc'); // returns NaN
 ```
 
 # --hints--
@@ -164,19 +165,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +249,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
index cc73e4744e4..400aca2e158 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
@@ -17,12 +17,6 @@ Você deve usar `return` para retornar o valor de `calories`.
 assert.match(getCaloriesFromInputs.toString(), /return\s+calories/);
 ```
 
-A nova instrução `return` deve vir após o laço `for`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /calories\s*\+=\sNumber\(currVal\);\n\s*}\n\s*return\s+calories/)
-```
-
 # --seed--
 
 ## --seed-contents--
@@ -142,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -229,12 +216,11 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -244,9 +230,10 @@ function getCaloriesFromInputs(list) {
     }
     calories += Number(currVal);
   }
+  --fcc-editable-region--
 
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
index 160ca532861..48b1853de3b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
@@ -26,7 +26,7 @@ assert.isFunction(calculateCalories);
 A função `calculateCalories` deve receber um argumento `e`.
 
 ```js
-assert.match(calculateCalories?.toString(), /\(e\)/);
+assert.match(calculateCalories?.toString(), /\(\s*e\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
index 51a842f2edf..ec0d5aeb7a4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
@@ -16,7 +16,7 @@ Adicione uma linha à função `calculateCalories` que chame o método `preventD
 A função `calculateCalories` deve chamar `e.preventDefault()`.
 
 ```js
-assert.match(calculateCalories.toString(), /e\.preventDefault\(\)/);
+assert.match(calculateCalories.toString(), /e\.preventDefault\(\s*\)/);
 ```
 
 A função `calculateCalories` deve redefinir a flag de erro global como `false`.
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -240,8 +233,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
index 0ac6e82fb69..b1c2fa9583e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
@@ -22,13 +22,13 @@ assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=/);
 Você deve chamar `document.querySelectorAll()` com `#breakfast input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 Você deve atribuir o resultado da chamada de `document.querySelectorAll()` para `breakfastNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -249,8 +242,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
index 9f4f3f76f34..55502bb91d7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=/);
 Você deve chamar `document.querySelectorAll()` com `#lunch input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Você deve atribuir o resultado da chamada de `document.querySelectorAll()` a `lunchNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -248,8 +241,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
index 74589da692c..e4b447ec1e9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=/);
 Você deve chamar `document.querySelectorAll()` com `#dinner input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Você deve atribuir o resultado da chamada de `document.querySelectorAll()` a `dinnerNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Você deve declarar uma variável `snacksNumberInputs`.
@@ -38,13 +38,13 @@ assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=/);
 Você deve chamar `document.querySelectorAll()` com `#snacks input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Você deve atribuir o resultado da chamada de `document.querySelectorAll()` a `snacksNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Você deve declarar uma variável `exerciseNumberInputs`.
@@ -56,13 +56,13 @@ assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=/);
 Você deve chamar `document.querySelectorAll()` com `#exercise input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Você deve atribuir o resultado da chamada de `document.querySelectorAll()` a `exerciseNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -285,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
index 240303d871a..328287e3406 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +248,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
index 2a2eba12254..3947b65d85e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -254,8 +247,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
index c083f8776c3..66a35f77383 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -291,8 +284,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
index 5104eb86227..16c9094eef4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -262,8 +255,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
index 1d40c78abbe..c02dfe43b54 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -260,8 +253,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
index b225308807f..81d1ef6d3d0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -270,8 +263,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
index 5fc50418240..af1a2b55423 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -265,8 +258,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
index 424665bf766..5033f03cded 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
@@ -162,19 +162,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +273,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
index 5809eb1db14..eaeab00e615 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
@@ -7,7 +7,7 @@ dashedName: step-78
 
 # --description--
 
-Você precisa construir a string HTML que será exibida no elemento `output`. Comece atribuindo um template literal vazio à propriedade `innerHTML` do elemento `output`.
+Você precisa construir a string HTML que será exibida no elemento `output`. Start by assigning an empty template literal to the `innerHTML` property of the `output` element on a new line at the end of the function.
 
 # --hints--
 
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -263,8 +256,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
index 31367a1d51f..e3e62377db4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
@@ -7,9 +7,16 @@ dashedName: step-79
 
 # --description--
 
-A string de `output.innerHTML` precisará de um elemento `span`. Crie o elemento e dê a ele um atributo `class` definido como a variável `surplusOrDeficit`, mas em minúsculas.
+When you need to lower case a string, you can use the <dfn>toLowerCase()</dfn> method. This method returns the calling string value converted to lower case.
 
-Strings têm um método `.toLowerCase()` que pode ajudar você com isso. Não coloque texto no `span` por enquanto.
+```js
+const firstName = 'JESSICA';
+console.log(firstName.toLowerCase()); // Output: jessica
+```
+
+A string de `output.innerHTML` precisará de um elemento `span`. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable. Your `surplusOrDeficit` variable should be converted to lower case using the `toLowerCase()` method.
+
+Não coloque texto no `span` por enquanto.
 
 # --hints--
 
@@ -160,19 +167,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -279,8 +279,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
index fd10646cce0..3162f1b6f5a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -258,8 +251,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
index 516372d7c5c..2a8c62afe10 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
@@ -9,7 +9,14 @@ dashedName: step-81
 
 Quando o usuário tem um déficit de calorias, o valor de `remainingCalories` será negativo. Você não quer exibir um número negativo na string de resultado.
 
-`Math.abs()` é um método incorporado do JavaScript que retornará o valor absoluto de um número. No texto de `span`, envolva a referência a `remainingCalories` com `Math.abs()` para garantir que o valor seja positivo.
+`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number.
+
+```js
+const num = -5;
+Math.abs(num); // 5
+```
+
+No texto de `span`, envolva a referência a `remainingCalories` com `Math.abs()` para garantir que o valor seja positivo.
 
 # --hints--
 
@@ -24,7 +31,7 @@ O `span` deve ter o texto `${Math.abs(remainingCalories)} Calorie ${surplusOrDef
 
 ```js
 const htmlString = code.split(/output\s*\.\s*innerHTML\s*=\s*/)[1].split(/`/)[1];
-assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(remainingCalories\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
+assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(\s*remainingCalories\s*\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
 ```
 
 # --seed--
@@ -146,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -267,8 +267,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
index 80f0c4e4053..984ac328e5f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
index a9738dad4bf..80223db60dd 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -283,8 +276,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
index c4b73aef0af..a8523a7158e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
@@ -158,19 +158,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -282,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
index d7cbf469fbb..aff36c29796 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
@@ -9,6 +9,11 @@ dashedName: step-85
 
 Por fim, você precisa tornar o elemento `#output` visível para que o usuário possa ver o texto. A variável `output` é um elemento e tem uma propriedade `classList`. Essa propriedade tem um método `.remove()`, que aceita uma string que representa a classe a ser removida do elemento.
 
+```js
+const paragraphElement = document.getElementById('paragraph');
+paragraphElement.classList.remove('hide');
+```
+
 Use o método `.remove()` da propriedade `classList` da variável `output` para remover a classe `hide`. Não se esqueça de colocar a palavra `hide` entre aspas.
 
 # --hints--
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -277,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
index dadf29ebc4b..8eafbe31dcc 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
index 94f851a99df..bad548d9b76 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
index da72ffd5f6c..8e924c192f6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
index 2fb784c9a4c..5612b8f156f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
@@ -9,6 +9,22 @@ dashedName: step-89
 
 Lembre-se de que `document.querySelectorAll` retorna uma `NodeList`, que é semelhante a um array, mas não é um array. No entanto, o objeto `Array` tem um método `.from()` que aceita algo semelhante a um array e retorna um array. Isso é útil quando você quer acesso a métodos de array mais robustos, que você aprenderá em um projeto futuro.
 
+The following example takes a `NodeList` of `li` elements and converts it to an array of `li` elements:
+
+```html
+<ul>
+  <li>List 1</li>
+  <li>List 2</li>
+  <li>List 3</li>
+</ul>
+```
+
+```js
+const listItemsArray = Array.from(document.querySelectorAll('li'));
+
+console.log(listItemsArray); //Output: (3) [li, li, li]
+```
+
 Envolva o seletor de consulta `inputContainers` em `Array.from()`. Faça isso na mesma linha da declaração.
 
 # --hints--
@@ -144,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -269,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
index 7e5e7f11a80..7acb7a65735 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
@@ -7,33 +7,25 @@ dashedName: step-90
 
 # --description--
 
-É a hora de criar outro laço de repetição. Use um laço `for` para percorrer o array `inputContainers`.
+É a hora de criar outro laço de repetição. Create a `for...of` loop with a variable called `container` to iterate through the `inputContainers` array.
 
-Dentro do laço, defina a propriedade `innerHTML` do elemento do índice atual como uma string vazia. Isso limpará todo o conteúdo daquele contêiner de inputs.
+Inside the loop, set the `innerHTML` property of the `container` to an empty string. Isso limpará todo o conteúdo daquele contêiner de inputs.
 
 # --hints--
 
-A função `clearForm` deve ter um laço `for`.
+Your `for...of` loop should iterate through the `inputContainers` array. The loop's variable name should be `container`.
 
 ```js
-// loop protect injects stuff, so let's look at the raw code again
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(/);
+assert.match(clearForm, /for\s*\(\s*const\s+container\s+of\s+inputContainers\s*\)/);
 ```
 
-O laço `for` deve percorrer o array `inputContainers`. Lembre-se de usar `i` como seu iterador.
+Your `for...of` loop should set the `innerHTML` property of `container` to an empty string.
 
 ```js
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*inputContainers\.length\s*;\s*i\s*\+\+\s*\)/);
-```
-
-No laço `for`, você deve definir a propriedade `innerHTML` de `inputContainers[i]` como uma string vazia.
-
-```js
-const clearForm = code.split("function clearForm()")[1];
-const forLoop = clearForm.split("for")[1];
-assert.match(forLoop, /inputContainers\[\s*i\s*\]\s*\.innerHTML\s*=\s*(`|'|")\1\s*/);
+const forOfLoop = clearForm.split("for")[1];
+assert.match(forOfLoop, /container\s*\.\s*innerHTML\s*=\s*(`|'|")\1\s*/);
 ```
 
 # --seed--
@@ -155,19 +147,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +265,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
index aac9c9cd9fc..74afc4ba894 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
index 454353f62c9..5bf92e44564 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
index 2eb0fe29a0a..c8fa3e4b3fa 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
index dd1b1455750..a02f65945f0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -292,8 +285,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
@@ -425,19 +418,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -550,8 +536,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -567,8 +553,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
index 317730a8dad..43fbc46969d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
@@ -16,13 +16,13 @@ Na função `createLabel`, declare uma variável `label` e atribua a ela um novo
 Você deve declarar uma variável `label` na função `createLabel`.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*(?:const|let|var)\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*(?:const|let|var)\s+label/);
 ```
 
 A variável `label` deve ser declarada com `const`.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*const\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*const\s+label/);
 ```
 
 Você deve usar o método `.createElement()` no objeto `document`.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
index 49e227d5af8..dd62eaa0a5d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
@@ -22,7 +22,7 @@ assert.match(code, /letters\.forEach\(/);
 Você deve passar a referência da função `createLabel` para o método `.forEach()`.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*createLabel\s*\)/);
+assert.match(code, /letters\.forEach\(\s*(?:\(\s*([\S]*)\s*\)|\s*([\S]*))\s*=>\s*createLabel\(\s*\1\2\s*\)\s*\)|letters\.forEach\(\s*createLabel\s*\)/);
 ```
 
 Você não deve passar uma chamada para a função `createLabel`.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
index 2db6707e321..9072741fe9b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
@@ -7,9 +7,9 @@ dashedName: step-16
 
 # --description--
 
-Na função de callback, chame `createLabel()` e passe `number` como argumento. Você deve ver alguns números aparecerem na planilha.
+Na função de callback, você precisará fazer duas chamadas de função. Comece chamando `createLabel()` e passe `number` como argumento. Você deve ver alguns números aparecerem na planilha.
 
-Em seguida, chame o método `.forEach()` no array `letters`. Pass an empty callback function which takes a `letter` parameter.
+Em seguida, chame o método `.forEach()` no array `letters`. Passe uma função de callback vazia que receba o argumento `letter`.
 
 # --hints--
 
@@ -46,7 +46,13 @@ assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{/)
 A função de callback deve estar vazia.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{\s*\}/)
+assert.match(code, /letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}/)
+```
+
+A função de callback `letters.forEach()` deve ser aninhada dentro da função de callback `range(1, 99).forEach(number => {}`.
+
+```js
+assert.match(code, /range\s*\(\s*1\s*,\s*99\s*\)\s*.forEach\s*\(\s*(\(\s*number\s*\)|number)\s*=>\s*\{\s*[^}]*letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}\s*\)\s*\}\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
index 6d69b726c6d..b654af7ac83 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
@@ -9,8 +9,6 @@ dashedName: step-17
 
 Agora, na chamada aninhada de `.forEach()`, declare uma variável `input`. Use o método `.createElement()` do objeto `document` para criar um elemento `input`. Defina o atributo `type` como `text` e o atributo `id` como `letter + number`.
 
-Para fins de acessibilidade, defina o atributo `aria-label` com o mesmo valor que o atributo `id`.
-
 # --hints--
 
 Você deve declarar uma variável `input`.
@@ -67,18 +65,6 @@ Você deve definir o atributo `id` do elemento `input` como `letter + number`.
 assert.match(code, /input\.id\s*=\s*letter\s\+\snumber/)
 ```
 
-Você deve acessar a propriedade `ariaLabel` do elemento `input`.
-
-```js
-assert.match(code, /input\.ariaLabel/);
-```
-
-Você deve definir o atributo `aria-label` do elemento `input` como `letter + number`.
-
-```js
-assert.match(code, /input\.ariaLabel\s*=\s*letter\s\+\snumber/)
-```
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
index ab2ea01dbfe..be63a05a25f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
@@ -1,8 +1,8 @@
 ---
 id: 643498328cb52026123e2b91
-title: Passo 18
+title: Step 19
 challengeType: 0
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
index 1b071c92d48..c0f02926c30 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
@@ -1,8 +1,8 @@
 ---
 id: 643498755d54c6279ba09078
-title: Passo 19
+title: Step 20
 challengeType: 0
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
index abf93209746..2bfe0c57488 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
@@ -1,8 +1,8 @@
 ---
 id: 6437124c4c03dd4c8fb35d56
-title: Passo 20
+title: Step 21
 challengeType: 0
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
index 1510db9456e..54c7f12593b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
@@ -1,8 +1,8 @@
 ---
 id: 6437133052eaf04d7300e622
-title: Passo 21
+title: Step 22
 challengeType: 0
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
index 0c90a46dbb4..a93d57ca51d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
@@ -1,8 +1,8 @@
 ---
 id: 643715013330824ecaa70442
-title: Passo 22
+title: Step 23
 challengeType: 0
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
index a9caf741c7c..291ed1af9de 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d1e5af8c0148fbef96d
-title: Passo 23
+title: Step 24
 challengeType: 0
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
index cdc22ddd12c..8057c85f371 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d80bc174a158c973080
-title: Passo 24
+title: Step 25
 challengeType: 0
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
@@ -50,19 +50,19 @@ assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*n
 O primeiro elemento do array passado para `average()` deve ser o elemento no índice `middle` do array `sorted`.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]/);
 ```
 
 O primeiro elemento do array passado para `average()` deve ser o elemento no índice `middle + 1` do array `sorted`.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\)/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)/);
 ```
 
 Se o ternário for falso, você deve retornar o valor de `sorted` no índice `middle`. Use `Math.ceil()` para arredondar o valor de `middle` para cima.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\[\s*Math\.ceil\(\s*middle\s*\)\s*\];?/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\s*\[\s*Math\.ceil\(\s*middle\s*\)\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
index 633da0ee9ad..4a74fcecb08 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
@@ -1,8 +1,8 @@
 ---
 id: 64496df724dd3716a71fe971
-title: Passo 25
+title: Step 26
 challengeType: 0
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
index 12df20ff334..a24ff13507b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
@@ -1,8 +1,8 @@
 ---
 id: 64496e9c6d7a2e189948e441
-title: Passo 26
+title: Step 27
 challengeType: 0
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
index c3efe25d04f..3c6883d634c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
@@ -1,8 +1,8 @@
 ---
 id: 6449749d20436c1f1dfadcf2
-title: Passo 27
+title: Step 28
 challengeType: 0
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
index b72b1c54169..bbcdec90677 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
@@ -1,8 +1,8 @@
 ---
 id: 6449755666005520330cec5b
-title: Passo 28
+title: Step 29
 challengeType: 0
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
index 14d0d50c6f5..06f8b00fcb8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
@@ -1,8 +1,8 @@
 ---
 id: 64497da4062602213ecf32e7
-title: Passo 29
+title: Step 30
 challengeType: 0
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
index fe8534e1715..98982c3866c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
@@ -1,8 +1,8 @@
 ---
 id: 64497de936a2f322327e5c58
-title: Passo 30
+title: Step 31
 challengeType: 0
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
index 1ca8f34dd66..0c45afd8437 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e0e5e5a2c2329785af4
-title: Passo 31
+title: Step 32
 challengeType: 0
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
@@ -16,7 +16,7 @@ Use the `&&` operator to add a second condition to your `if` statement that also
 You should use the `&&` operator to add a second condition to your `if` statement that also checks if the first character of `value` is `=`. Você pode usar `[0]`, `.startsWith()` ou `.charAt(0)`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
index f6323decc98..9a1dffd587c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e764135bd24b7960dd3
-title: Passo 32
+title: Step 33
 challengeType: 0
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
index e3f70826618..1de1516ac64 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
@@ -1,8 +1,8 @@
 ---
 id: 6449842c6f6c84261075e4c9
-title: Passo 33
+title: Step 34
 challengeType: 0
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
index c52ad52a1a9..1293848a442 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
@@ -1,8 +1,8 @@
 ---
 id: 64498473a17adc26ef0ecc2d
-title: Passo 34
+title: Step 35
 challengeType: 0
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
index 36d6b79b3a2..68c01b12f6e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
@@ -1,8 +1,8 @@
 ---
 id: 6449849b78f43527be1e8a98
-title: Passo 35
+title: Step 36
 challengeType: 0
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
index 5c2b7628446..207ea36ccb0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
@@ -1,8 +1,8 @@
 ---
 id: 64498542cab69128ab24e4de
-title: Passo 36
+title: Step 37
 challengeType: 0
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
index 12b33ea7675..4270a45435d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
@@ -1,8 +1,8 @@
 ---
 id: 6449860d84c9e22cbd7b497c
-title: Passo 37
+title: Step 38
 challengeType: 0
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
index 05583f799a6..fb82a642673 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
@@ -1,8 +1,8 @@
 ---
 id: 6449863f592af72d9be0959e
-title: Passo 38
+title: Step 39
 challengeType: 0
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
index 094d5250abc..f132943451b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
@@ -1,8 +1,8 @@
 ---
 id: 6449874d5191562eb3313b3f
-title: Passo 39
+title: Step 40
 challengeType: 0
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
index aac5899498f..d5b7abb4557 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
@@ -1,8 +1,8 @@
 ---
 id: 6449876e7aae0d2f8257a497
-title: Passo 40
+title: Step 41
 challengeType: 0
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
index 342ad0c5672..135dc8a5a04 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
@@ -1,8 +1,8 @@
 ---
 id: 64498b085028fc30a58bb6a7
-title: Passo 41
+title: Step 42
 challengeType: 0
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
index c18c8e7ab8c..0ae04ba1a9d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0889c6ff4baa46ac1c50
-title: Passo 42
+title: Step 43
 challengeType: 0
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
index 47afad32ddf..c159bee9f25 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
@@ -1,8 +1,8 @@
 ---
 id: 646d09a07241aaab1e777080
-title: Passo 43
+title: Step 44
 challengeType: 0
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
index 9171ddd89ec..8424bf17da6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0a022da7bcabf3e3aca3
-title: Passo 44
+title: Step 45
 challengeType: 0
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
index f0ed60f76a5..54fe0a588ac 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0d20108440acc95a6b32
-title: Passo 45
+title: Step 46
 challengeType: 0
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
index 354685c0fe6..c3911193e2c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0db5175974ad8633b71c
-title: Passo 46
+title: Step 47
 challengeType: 0
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
index 13a9ad096bc..fc7fde7e1eb 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0e4636e14eae2bb3b992
-title: Passo 47
+title: Step 48
 challengeType: 0
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
index 1bb1190d2b0..7b9b1f02818 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1980018efaaec2b1c28b
-title: Passo 48
+title: Step 49
 challengeType: 0
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
index 5238fef7661..f47174bcc4e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
@@ -1,8 +1,8 @@
 ---
 id: 646d19fc4705e4af65c3e688
-title: Passo 49
+title: Step 50
 challengeType: 0
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
index 83d29c361d0..618654ef12f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1b96dd7ea4b0061458bc
-title: Passo 50
+title: Step 51
 challengeType: 0
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
index 88e15df5d0c..80660eb23d6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
@@ -1,13 +1,13 @@
 ---
 id: 646d1cadf0d96ab0b7e12da4
-title: Passo 51
+title: Step 52
 challengeType: 0
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
 
-Como `elemValue` retorna uma função, a função `addChars` retorna, no fim, um array de referências de função. Você quer que o método `.map()` execute a função interna à função `elemValue`, o que significa que você precisa chamar `elemValue` em vez de fazer referência a ela. Passe `num` como argumento para a função `elemValue`.
+Because `elemValue` returns a function, your `addCharacters` function ultimately returns an array of function references. Você quer que o método `.map()` execute a função interna à função `elemValue`, o que significa que você precisa chamar `elemValue` em vez de fazer referência a ela. Passe `num` como argumento para a função `elemValue`.
 
 <!-- TODO: Explain further? -->
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
index 0411153ea1d..1fe5a26b8cb 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1d67f9261fb15a795588
-title: Passo 52
+title: Step 53
 challengeType: 0
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
index cca22053358..c7ab249641b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1e531042dfb24da1f032
-title: Passo 53
+title: Step 54
 challengeType: 0
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
@@ -16,13 +16,13 @@ A função de callback receber alguns parâmetros. O primeiro é a string corres
 Você deve passar uma arrow function como segundo argumento para o método `.replace()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 A arrow function deve ter um parâmetro `match`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
index 958a3de241a..56311b5b4f6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3141790b3cb337dd611a
-title: Passo 54
+title: Step 55
 challengeType: 0
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
index f282bb179d3..220d7e0996f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
@@ -1,8 +1,8 @@
 ---
 id: 646d382c4d70ceb3dba1e830
-title: Passo 55
+title: Step 56
 challengeType: 0
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
index bc1a563b6c7..b4b53eff5d7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
@@ -1,8 +1,8 @@
 ---
 id: 646d386a685620b49db4be76
-title: Passo 56
+title: Step 57
 challengeType: 0
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
index 34a36593288..abc9a6dce6f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38c326f3c8b54023de38
-title: Passo 57
+title: Step 58
 challengeType: 0
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
index 2dc1bcb0e1f..da285281f0f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38f906b94cb5fe6ce7de
-title: Passo 58
+title: Step 59
 challengeType: 0
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
index 4ec746c649a..b2bcc0ecdd6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3952f6af37b6a1c241c2
-title: Passo 59
+title: Step 60
 challengeType: 0
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
index f4f06da33a0..427172ecd1a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
@@ -1,8 +1,8 @@
 ---
 id: 646d39c156fe94b7482c3ab6
-title: Passo 60
+title: Step 61
 challengeType: 0
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
index 1c62420235f..30da7529ca3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3b27cd3c56b875256301
-title: Passo 61
+title: Step 62
 challengeType: 0
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
index ba035568bba..0c48a3cc185 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3bc75fe0c9b972da3323
-title: Passo 62
+title: Step 63
 challengeType: 0
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
index 97f2da7f527..fbd04ff0b3c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3c146e10b0ba222bb2a7
-title: Passo 63
+title: Step 64
 challengeType: 0
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
index d237697dc06..756cef18cff 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d037872fbbae0a8ec0e
-title: Passo 64
+title: Step 65
 challengeType: 0
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
index e6c1f583585..e48c71b44a6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d65be79c8bb9c7df9ff
-title: Passo 65
+title: Step 66
 challengeType: 0
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
index 60ba6acd175..ac396d720a4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d80c3b4aebc4103618e
-title: Passo 66
+title: Step 67
 challengeType: 0
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
index ed77ba2b23b..f1516d8cbb2 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3da8501e15bcd355ba1d
-title: Passo 67
+title: Step 68
 challengeType: 0
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
index d0da4a512c4..2ebd1e3e841 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e135ab3abbdbfe5c899
-title: Passo 68
+title: Step 69
 challengeType: 0
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
index a75176261b2..c737bba73b1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e64b15f92be6e61704e
-title: Passo 69
+title: Step 70
 challengeType: 0
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str
 Your callback function should use bracket notation to access the property of the `infixToFunction` object that matches the value of the `operator` parameter.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
index 3498031e50f..fb7736570ad 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3ee7b17ae3bf48610033
-title: Passo 70
+title: Step 71
 challengeType: 0
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
@@ -14,19 +14,19 @@ dashedName: step-70
 A função de callback deve retornar o resultado da chamada de `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(/);
 ```
 
 Você deve passar `arg1` como o primeiro argumento para a chamada de `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1/);
 ```
 
 Você deve passar `arg2` como o segundo argumento para a chamada de `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
index c38e91327ad..140d3e9cec4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f1fd12f76c02c823bb8
-title: Passo 71
+title: Step 72
 challengeType: 0
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
@@ -16,13 +16,13 @@ Envolva cada um dos argumentos de `infixToFunction[operator]` em uma chamada de
 Você deve envolver `arg1` em uma chamada de `parseFloat()`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
 ```
 
 Você deve envolver `arg2` em uma chamada de `parseFloat()`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
index 52f4bd2fcbd..daf669c3126 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f718b5f8dc102cd528e
-title: Passo 72
+title: Step 73
 challengeType: 0
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
index 1651b4b79e3..57a519f5d16 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
@@ -1,8 +1,8 @@
 ---
 id: 646d404259f512c1a9e86ac1
-title: Passo 73
+title: Step 74
 challengeType: 0
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
index 15f2bd2f3bd..bdf630d03bd 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40c543943ec250039682
-title: Passo 74
+title: Step 75
 challengeType: 0
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
index 7854a845d67..ac40d8dd4d8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40fe4b7b50c30c2b4cd8
-title: Passo 75
+title: Step 76
 challengeType: 0
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
index fc91fda66c8..7af03e6aa44 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
@@ -1,8 +1,8 @@
 ---
 id: 646d41e23b583fc3b8cc4579
-title: Passo 76
+title: Step 77
 challengeType: 0
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
index c14609b9bd0..ee62c4ead65 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
@@ -1,8 +1,8 @@
 ---
 id: 646d423fade4a9c4636acd13
-title: Passo 77
+title: Step 78
 challengeType: 0
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
index cc4d3113ab7..09b3da9785d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
@@ -1,8 +1,8 @@
 ---
 id: 646d42f58deb2fc52adc6611
-title: Passo 78
+title: Step 79
 challengeType: 0
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
index a64dfa1539f..61c9593956b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d43587d926bc5b6cb2e50
-title: Passo 79
+title: Step 80
 challengeType: 0
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
index 91edf8e1cbf..18e4826df21 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d448479c8fdc8dcec868c
-title: Passo 80
+title: Step 81
 challengeType: 0
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
index e96a4aaa088..6a2b80ff99a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d44da986f2bc9b72f5fe2
-title: Passo 81
+title: Step 82
 challengeType: 0
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
index 0cf658800ad..afa58f89f9c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
@@ -1,8 +1,8 @@
 ---
 id: 646d451c2e44afca71b67818
-title: Passo 82
+title: Step 83
 challengeType: 0
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
index 75818dce84c..988b001165c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4554721d43cb19a68bc4
-title: Passo 83
+title: Step 84
 challengeType: 0
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
@@ -28,13 +28,13 @@ assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*cons
 A função `apply` deve acessar a propriedade do objeto `spreadsheetFunctions` que corresponda ao valor de `fn`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn/);
 ```
 
 A função `apply` deve chamar o método `.toLowerCase()` em `fn` no acesso à propriedade.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]/);
 ```
 
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
index 668d64fdb08..869b75e6dbf 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45b739da5ecbf830c108
-title: Passo 84
+title: Step 85
 challengeType: 0
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
@@ -14,19 +14,19 @@ A função `apply` está retornando a função de planilha, mas sem aplicá-la.
 A função `apply` deve acessar a função `spreadsheetFunctions[fn.toLowerCase()]`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(/);
 ```
 
 Você deve passar uma chamada de `toNumberList()` para a chamada de `spreadsheetFunctions[fn.toLowerCase()]`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(/);
 ```
 
 Você deve passar `args` para a chamada de `toNumberList()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
index fbcbc2ee852..62fc8e23eaf 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45ee725632cca2555146
-title: Passo 85
+title: Step 86
 challengeType: 0
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Agora, `applyFunction` precisa retornar um resultado. Retorne o resultado da cha
 A função `applyFunction` deve retornar o resultado da chamada do método `.replace()` em `str2`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(/);
 ```
 
 Você deve passar `functionCall` como o primeiro argumento para a chamada de `.replace()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall/);
 ```
 
 Você deve passar uma arrow function vazia como segundo argumento para a chamada de `.replace()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
 ```
 
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
index 6ac380c4723..009cd15cb91 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4626420eeecd51f241c2
-title: Passo 86
+title: Step 87
 challengeType: 0
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Lembre-se de deixar `fn` em minúsculas.
 A função de callback deve ter `match` como o primeiro parâmetro.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
 ```
 
 A função de callback deve ter `fn` como o segundo parâmetro.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
 ```
 
 A função de callback deve ter `args` como o terceiro parâmetro.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
 ```
 
 A função de callback deve usar um retorno implícito.
 
 ```js
-assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
+assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
 ```
 
 A função de callback deve retornar o resultado da chamada do método `.hasOwnProperty()` no objeto `spreadsheetFunctions`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
 ```
 
 Você deve passar `fn` para o método .`hasOwnProperty()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn/);
 ```
 
 Você deve chamar o método `.toLowerCase()` em `fn`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
index 254c9b09b39..d3f117e8bd7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d467c6994f4ce0dc416a4
-title: Passo 87
+title: Step 88
 challengeType: 0
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
@@ -14,31 +14,31 @@ Use o operador ternário para transformar a chamada de `.hasOwnProperty()` na co
 A função de callback deve usar a sintaxe dos operadores ternários.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
 ```
 
 Se a condição ternária for verdadeira, a função de retorno de chamada deve retornar o resultado da chamada de `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\s*\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\s*\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
 ```
 
 Você deve passar `fn` como o primeiro argumento para a chamada de `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
 ```
 
 Você deve passar `args` como o segundo argumento para a chamada de `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
 ```
 
 Se a condição ternária for falsa, você deve retornar `match`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
index 46a42f7dcec..c527d3a4db9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
@@ -1,8 +1,8 @@
 ---
 id: 646d46c03e7d02cecb30f021
-title: Passo 88
+title: Step 89
 challengeType: 0
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
@@ -14,25 +14,25 @@ Agora, você pode começar a aplicar seu analisador de função para a lógica d
 Você deve declarar uma variável `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
 ```
 
 Você deve usar `const` para declarar a variável `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*const\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*const\s+functionExpanded\s*=\s*/);
 ```
 
 Você deve atribuir à variável `functionExpanded` o resultado da chamada da função `applyFunction`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
 ```
 
 Você deve passar `cellExpanded` para a chamada de `applyFunction`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
index ac219e1344c..2fed6c2c4de 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4717a689e1cfa232e357
-title: Passo 89
+title: Step 90
 challengeType: 0
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Use um operador ternário para verificar se `functionExpanded` é igual à strin
 A função `evalFormula` deve usar a palavra-chave `return`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
 ```
 
 A instrução `return` deve verificar se `functionExpanded` é igual a `x`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
 ```
 
 A instrução `return` deve usar um operador ternário.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
 ```
 
 Se a condição ternária for verdadeira, `evalFormula()` deve retornar `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
 ```
 
 Se a condição ternária for falsa, `evalFormula()` deve retornar o resultado da chamada de `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
 ```
 
 Você deve passar `functionExpanded` como o primeiro argumento para a chamada de `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
 ```
 
 Você deve passar `cells` como o segundo argumento para a chamada de `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
index ed878714df1..a23024a7cf1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4769ba65f1d05ef6b634
-title: Passo 90
+title: Step 91
 challengeType: 0
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
@@ -16,19 +16,19 @@ Dentro da instrução `if`, defina `value` em `element` como o resultado da fun
 Você deve atualizar a propriedade `value` de `element` no bloco `if`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
 ```
 
 Você deve atribuir a `value` o resultado da chamada da função `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
 ```
 
 Você não deve passar argumentos argumento para a chamada de `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
index d4fca4cd1ea..5920dedba2c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
@@ -1,8 +1,8 @@
 ---
 id: 646d47c8f58107d10f1e5106
-title: Passo 91
+title: Step 92
 challengeType: 0
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
@@ -14,19 +14,19 @@ O primeiro argumento para a chamada de `evalFormula` precisa ser o conteúdo da
 Você deve passar `value` como o primeiro argumento para a chamada de `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
 ```
 
 Você deve chamar o método `.slice()` no argumento `value`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(/);
 ```
 
 Você deve passar o número `1` como argumento para a chamada de `.slice()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(\s*1\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
index 24858362ffb..93db8749993 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4813c17b37d1e261a566
-title: Passo 92
+title: Step 93
 challengeType: 0
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Você pode obter rapidamente todas as células da página pelo `id` do elemento
 Para o segundo parâmetro da chamada de `evalFormula()`, você deve chamar o método `.getElementById()` do objeto `document`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
 ```
 
 Você deve passar `container` como argumento para a chamada de `.getElementById()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
 ```
 
 Você deve acessar a propriedade `children` do resultado da chamada de `.getElementById()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
index 7014855777c..582f9fd5214 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
@@ -1,8 +1,8 @@
 ---
 id: 646d486aec20f7d2a581cc36
-title: Passo 93
+title: Step 94
 challengeType: 0
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
@@ -14,7 +14,7 @@ Infelizmente, a propriedade `children` está retornando uma coleção de element
 Você deve envolver `document.getElementById('container').children` in `Array.from()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
index e2a21f55b3d..385e0333783 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
@@ -1,8 +1,8 @@
 ---
 id: 646d48b936802fd34c3f05af
-title: Passo 94
+title: Step 95
 challengeType: 0
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
index 89cd01743aa..306e0f7a786 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d498c8ebc31d3f753b22e
-title: Passo 95
+title: Step 96
 challengeType: 0
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
index dfcdb001520..0780acaa87a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
@@ -1,8 +1,8 @@
 ---
 id: 646d49bfff9079d4b38df115
-title: Passo 96
+title: Step 97
 challengeType: 0
-dashedName: step-96
+dashedName: step-97
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
index 494dd7b5838..603705b5d8c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a07a8fb14d55cd70e09
-title: Passo 97
+title: Step 98
 challengeType: 0
-dashedName: step-97
+dashedName: step-98
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
index b641271fe42..ccb6ea23282 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a5b32a1cad6165df286
-title: Passo 99
+title: Step 100
 challengeType: 0
-dashedName: step-99
+dashedName: step-100
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
index cfeb033a749..b9f1b89df69 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a8dbc04c6d6bb0001f8
-title: Passo 100
+title: Step 101
 challengeType: 0
-dashedName: step-100
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
index 958a6e8bce4..6457ab9b0d9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4ab9b3b4c5d74fdd2154
-title: Passo 101
+title: Step 102
 challengeType: 0
-dashedName: step-101
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
index 552e08d0567..0826e3328d1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4b3d80ea98d824c8a4f9
-title: Passo 102
+title: Step 103
 challengeType: 0
-dashedName: step-102
+dashedName: step-103
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
index d58e2a04475..4d6bcadaede 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
@@ -1,8 +1,8 @@
 ---
 id: 6491d38f5b09a021c4b5d5fe
-title: Passo 98
+title: Step 99
 challengeType: 0
-dashedName: step-98
+dashedName: step-99
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
new file mode 100644
index 00000000000..3a606f8e1cf
--- /dev/null
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
@@ -0,0 +1,104 @@
+---
+id: 65ae458e23954c3469e0c209
+title: Step 18
+challengeType: 0
+dashedName: step-18
+---
+
+
+# --description--
+
+In earlier projects you learned about the `setAttribute` method. Another way to update an attribute in JavaScript is to use the following syntax:
+
+```js
+el.attribute = value;
+```
+
+The property names for hyphenated HTML attribute values, such as `aria-label`, follow camel case, becoming `ariaLabel`.
+
+```js
+el.ariaLabel = "Aria Label Value";
+```
+
+Set the `aria-label` attribute for the `input` element to the same value as the `id` attribute.
+
+
+# --hints--
+
+You should have an `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=/);
+```
+
+
+You should assign `letter + number` to `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=\s*letter\s*\+\s*number/);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="./styles.css" />
+    <title>Functional Programming Spreadsheet</title>
+  </head>
+  <body>
+    <div id="container">
+      <div></div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+#container {
+  display: grid;
+  grid-template-columns: 50px repeat(10, 200px);
+  grid-template-rows: repeat(11, 30px);
+}
+
+.label {
+  background-color: lightgray;
+  text-align: center;
+  vertical-align: middle;
+  line-height: 30px;
+}
+```
+
+```js
+const range = (start, end) => Array(end - start + 1).fill(start).map((element, index) => element + index);
+const charRange = (start, end) => range(start.charCodeAt(0), end.charCodeAt(0)).map(code => String.fromCharCode(code));
+
+window.onload = () => {
+  const container = document.getElementById("container");
+  const createLabel = (name) => {
+    const label = document.createElement("div");
+    label.className = "label";
+    label.textContent = name;
+    container.appendChild(label);
+  }
+  const letters = charRange("A", "J");
+  letters.forEach(createLabel);
+  range(1, 99).forEach(number => {
+     createLabel(number);
+--fcc-editable-region--
+    letters.forEach(letter => {
+     const input = document.createElement("input");
+     input.type = "text";
+     input.id = letter + number;
+
+    })   
+--fcc-editable-region--
+  })
+}
+```
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
index d41bb95c1f4..f53d94dc9cb 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
@@ -16,7 +16,7 @@ Now you should be able to roll the dice a few times and see the values update.
 You should call your `updateStats` function inside the `else` clause.
 
 ```js
-assert.match(code, /updateStats\(\)/)
+assert.match(code, /updateStats\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
index 1ecb418b22f..ff0dd7d78a8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
@@ -28,7 +28,7 @@ assert.match(code, /const\s+updateRadioOption\s*=\s*\(.*\)\s*=>\s*{\s*[\s\S]*};?
 Your `updateRadioOption` function should take `optionNode` and `score` as parameters.
 
 ```js
-assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\)\s*=>\s*{\s*[\s\S]*};?/)
+assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\s*\)\s*=>\s*{\s*[\s\S]*};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
index 7e3d304b11e..a126ccdc5d3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
@@ -14,7 +14,7 @@ To enable the radio buttons, you should set the `disabled` property on `scoreInp
 You should assign `false` to `scoreInputs[optionNode].disabled`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.disabled\s*=\s*false/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.disabled\s*=\s*false/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
index 23824e0ea27..7fbea97bd63 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
@@ -14,7 +14,7 @@ Next, you will need to update the radio button's `value` to the current `score`.
 You should assign the `score` variable to `scoreInputs[optionNode].value`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.value\s*=\s*score/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.value\s*=\s*score/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
index 9fd508a6b38..f64c232b588 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
@@ -14,7 +14,7 @@ To display the current score, update the text content for the `span` element nex
 You should set the `textContent` property for `scoreSpans[optionNode]` to the following template literal: `, score = ${score}`.
 
 ```js
-assert.match(code, /scoreSpans\[\s*optionNode\s*\]\.textContent\s*=\s*`, score = \${score}`;?/);
+assert.match(code, /scoreSpans\s*\[\s*optionNode\s*\]\s*\.textContent\s*=\s*`, score = \${score}`;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
index 614afd85e67..0657086cd45 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
@@ -22,7 +22,7 @@ assert.match(code, /updateRadioOption\(.*\);?/);
 You should have the arguments of `0` and `10` for the `updateRadioOption` function.
 
 ```js
-assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
index d578193f267..5690bc61a69 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
@@ -14,7 +14,7 @@ Now that you have verified the `updateRadioOption` function works, remove the fu
 You should remove the `updateRadioOption` function call from your `else` clause.
 
 ```js
-assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
index 888bf0a9ea4..d989e999afc 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
@@ -18,19 +18,19 @@ Below your `if` statement, include an `else` clause that assigns `1` to `counts[
 You should have an `if` statement with a condition of `counts[num]`.
 
 ```js
-assert.match(code, /if\s*\(\s*counts\[num\]\s*\)/);
+assert.match(code, /if\s*\(\s*counts\s*\[\s*num\s*\]\s*\)/);
 ```
 
 You should use the `++` operator to increment the value of `counts[num]` by `1` inside your `if` statement.
 
 ```js
-assert.match(code, /counts\[num\]\s*\+\s*=\s*1|counts\[num\]\+\+/);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*\+\s*=\s*1|counts\s*\[\s*num\s*\]\s*\+\+/);
 ```
 
 You should assign `1` to `counts[num]` inside your `else` clause.
 
 ```js
-assert.match(code, /else\s*\{\s*counts\[num\]\s*=\s*1\s*;?\s*\}/);
+assert.match(code, /else\s*\{\s*counts\s*\[\s*num\s*\]\s*=\s*1\s*;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
index 1306a477ef5..f98fb63e896 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
@@ -22,7 +22,7 @@ assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s
 You should assign `counts[num]` to your `count` variable.
 
 ```js
-assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\[num\]\s*;?\s*}/);
+assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\s*\[\s*num\s*\]\s*;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
index 280e51e3a89..fa8f9c038d6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
@@ -16,7 +16,7 @@ Now, try rolling the dice again and you should see that the previous score `inpu
 You should call the `resetRadioOption` function inside the `rollDiceBtn` callback function.
 
 ```js
-assert.match(code, /resetRadioOption\(\);?/);
+assert.match(code, /resetRadioOption\(\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
index 9568ef64f53..7b750727a89 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
@@ -22,7 +22,7 @@ assert.isFunction(resetGame);
 You should use arrow syntax for your `resetGame` function.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*}\s*;?/);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
index df7dfa0260d..662463fbdc0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
@@ -24,25 +24,25 @@ assert.match(code, /diceValuesArr\s*=\s*\[\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s
 You should reassign the `score` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `totalScore` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `rolls` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `round` variable to `1`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
index 878df7a21c5..13dcb0e8ac7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
@@ -14,13 +14,13 @@ To reset each of the dice values to show `0`, apply a `forEach` method to the `l
 You should call the `forEach` method of the `listOfAllDice` variable.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
 ```
 
 For your callback function, you should use `dice` and `index` as parameters.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
index 9d0130f7006..903c795481d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
@@ -14,13 +14,13 @@ Inside your callback function, update the `dice` text content by assigning it th
 You should access the `textContent` property of the `dice` parameter.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
 ```
 
 You should assign `diceValuesArr[index]` to `dice.textContent`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
index 8a4415b4711..e9ab96ad852 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
@@ -20,25 +20,25 @@ Lastly, update the `currentRoundText` text content by assigning it the `round` v
 You should assign `totalScore` to `totalScoreText.textContent`.
 
 ```js
-assert.match(code, /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
+assert.match(resetGame.toString(), /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
 ```
 
 You should use the `innerHTML` property to set the `scoreHistory` to an empty string.
 
 ```js
-assert.match(code, /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
+assert.match(resetGame.toString(), /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
 ```
 
 You should assign `rolls` to `currentRoundRollsText.textContent`.
 
 ```js
-assert.match(code, /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
+assert.match(resetGame.toString(), /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
 ```
 
 You should assign `round` to `currentRoundText.textContent`.
 
 ```js
-assert.match(code, /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
+assert.match(resetGame.toString(), /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
index 0f82dd67761..fb53d1852a2 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
@@ -16,7 +16,7 @@ Assign the entire result of your `ternary` to `counts[num]`.
 You should assign `counts[num] ? counts[num] + 1 : 1` to `counts[num]` in the `for...of` loop.
 
 ```js
-assert.match(code, /counts\[num\]\s*=\s*counts\[num\]\s*\?\s*counts\[num\]\s*\+\s*1\s*:\s*1\s*;?/s);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*=\s*counts\s*\[\s*num\s*\]\s*\?\s*counts\s*\[\s*num\s*\]\s*\+\s*1\s*:\s*1\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
index 43f851c1ce1..5a846677f18 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasThreeOfAKind\s*=/);
 You should assign `Object.values(counts)` to your `hasThreeOfAKind` variable.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(3)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\)\.includes\(3\)\s*;?/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*3\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
index b3100f6b523..e3dd1595b52 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasPair\s*=/);
 You should assign `Object.values(counts)` to your `hasPair` variable.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(2)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\)\.includes\(2\)\s*;?/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*2\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
index 62fa9c452d5..b432e9ff872 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
@@ -36,7 +36,7 @@ assert.match(code, /const\s+sortedNumbersArr\s*=\s*arr\.sort\(.*\);?/);
 Your callback function should use `a` and `b` for the parameters and implicitly return `a - b`.
 
 ```js
-assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(a,\s*b\)\s*=>\s*a\s*-\s*b\s*\));?/);
+assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(\s*a,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\));?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
index 48b2fa8b43d..7c03c450f5a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+smallStraightsArr\s*=?\s*;?/);
 You should store the strings `1234`, `2345` and `3456` in an array and assign it to your `smallStraightsArr`.
 
 ```js
-assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\];?/);
+assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
index 3245d4b3e71..8fd1ce5e3a9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+largeStraightsArr\s*=?\s*;?/);
 You should store the strings `12345` and `23456` in an array and assign it to your `largeStraightsArr`.
 
 ```js
-assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\];?/);
+assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
index 81fb5ef136d..186143b48f9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `smallStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `3` and `30` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
index 706893901c9..e660acfb341 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `largeStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `4` and `40` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
index ebfef0c185a..12fe90ca89c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
@@ -16,7 +16,7 @@ Inside the `animate` function, create an `if` statement where the condition chec
 You should have an `if` statement that checks if the right key was pressed and the player's `x` position is less than 400.
 
 ```js
-assert.match(animate.toString(), /keys\.rightKey\.pressed\s*&&\s*player\.position\.x\s*<\s*400/);
+assert.match(animate.toString(), /keys\.rightKey\.(pressed|pressed\s*===\s*true)\s*&&\s*player\.position\.x\s*<\s*400/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
index ac0a33b2b3a..f125f31b634 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
@@ -30,7 +30,7 @@ assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*
 You should call the `draw` method on each `platform`.
 
 ```js
-assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\)\s*;?\s*}?\s*\);?/);
+assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\s*\)\s*;?\s*}?\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
index 91a297335a3..c7feb78a701 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
@@ -26,7 +26,7 @@ Your callback function should have a `platform` parameter.
 
 ```js
 const splitter = code.split("platform.position.x += 5;")
-assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\);?/);
+assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
index 5d5801c6647..156d18120b4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
@@ -9,17 +9,17 @@ dashedName: step-78
 
 Inside the callback function, create a new `const` variable called `collisionDetectionRules` and assign it an empty array.
 
-Inside that array, add a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+Inside that array, add a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 # --hints--
 
 You should have a `const` variable called `collisionDetectionRules` that is assigned an empty array.
 
 ```js
-assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\];?/);
+assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\s*\]\s*;?/);
 ```
 
-You should have a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+You should have a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 ```js
 assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*player\.position\.y\s*\+\s*player\.height\s*<=\s*platform\.position\.y\s*,?\s*]\s*;?/);
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
index dfe7ce4b613..e6fc321e0ab 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
@@ -14,7 +14,7 @@ Inside that array, add a boolean expression that checks if the player's `x` posi
 You should have a boolean expression that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
index 531cb86bc9b..f0b648b932d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
@@ -14,7 +14,7 @@ Below that boolean expression, add another boolean expression that checks if the
 You should have a boolean expression that checks if the player's `x` position is less than or equal to the sum of the platform's `x` position and the platform's width minus one third of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
index f21bf9f68eb..8a1ad2e4d93 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
@@ -16,21 +16,21 @@ Below that, add another boolean expression that checks if the player's `y` posit
 You should not alter the existing `platformDetectionRules` array and its content.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position plus the player's height is greater than or equal to the platform's `y` position.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position is less than or equal to the sum of the platform's `y` position plus the platform's height.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\]\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
index b9fbc606db2..b2be3d626ac 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
@@ -19,21 +19,21 @@ Your `CheckPoint` class should have a `draw` method.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{/);
 ```
 
 Your `draw` method should have a `fillStyle` property.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
 ```
 
 Your `draw` method should have a `fillRect` method.
 
 ```js
 const splitter = code.split('#f1be32')
-assert.match(splitter[1], /ctx\.fillRect\(this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\);?/);
+assert.match(splitter[1], /ctx\.fillRect\(\s*this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
index 6ebfeb45fad..1f5549ba322 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
@@ -25,14 +25,14 @@ assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\([^
 Your callback function should have a `checkpoint` parameter.
 
 ```js
-assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*[^)]*\s*\)\s*;?/);
+assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*[^)]*\s*\)\s*;?/);
 
 ```
 
 You should implicitly return a new `CheckPoint` instance.
 
 ```js
-assert.match(code, /\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
+assert.match(code, /\s*checkpointPositions\.map\s*\(\s*(\(checkpoint\s*\)|checkpoint)\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
index 73980a20ae2..24f8dec4481 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
@@ -24,13 +24,13 @@ assert.match(code, /\bcheckpoints\b\s*\.\s*forEach\s*\(/s);
 You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*checkpoint\s*=>\s*{/s);
+assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*{?/s);
 ```
 
 You should call the `draw` method on each `checkpoint` inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\.forEach\s*\(\s*checkpoint\s*=>\s*{\s*checkpoint\.draw\(\s*\);?\s*}\s*\);?/s);
+assert.match(code, /\s*checkpoints\.forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*(\{\s*checkpoint\.draw\(\s*\)\s*;?\s*\}|checkpoint\.draw\(\s*\))\s*\)\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
index 27791810882..be0f00beb3a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
@@ -24,7 +24,7 @@ You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
 const splitter = code.split("if (keys.rightKey.pressed && isCheckpointCollisionDetectionActive)")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(?checkpoint\)?\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*\{/);
 ```
 
 You should use the subtraction assignment operator to subtract 5 from the `checkpoint`'s `x` position.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
index 472890ae8e3..fd937a56888 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
@@ -42,7 +42,7 @@ assert.match(code, /\s*setTimeout\s*\(\s*\(\s*\)\s*=>[^,]*,\s*2000\s*\)/s);
 Your callback function should set the `checkpointScreen` `display` property to `none`.
 
 ```js
-assert.match(code, /\s*if\s*\(isCheckpointCollisionDetectionActive\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
+assert.match(code, /\s*if\s*\(\s*isCheckpointCollisionDetectionActive\s*\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
index d95b52d7d39..3bde75eb563 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
@@ -24,7 +24,7 @@ Your callback function should have a `checkpoint` parameter and `index`.
 
 ```js
 const splitter = code.split("player.velocity.y = gravity;")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(checkpoint,\s*index\)\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*\(\s*checkpoint,\s*index\s*\)\s*=>\s*\{/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
index 42f23d72376..fe743aad962 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
@@ -14,7 +14,7 @@ Inside the `if` statement, call the `claim` method on the `checkpoint` object.
 You should call the `claim()` method on the `checkpoint` object.
 
 ```js
-assert.match(code, /checkpoint\.claim\(\);?/)
+assert.match(code, /checkpoint\.claim\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
index 08687b30ad9..02f29f132f9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
@@ -24,7 +24,7 @@ assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\
 You should call the `showCheckpointScreen` function and pass in "You reached the final checkpoint!" as an argument.
 
 ```js
-assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\);?/)
+assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(\s*("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\s*\);?/)
 ```
 
 You should call the `movePlayer` function and pass in the provided arguments.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
index 0197fc59077..2d7118981f4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
@@ -18,37 +18,37 @@ Begin by accessing the `task-form`, `confirm-close-dialog`, and `open-task-form-
 You should use `getElementById()` to access the `task-form` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should assign the `task-form` element to the variable `taskForm`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `confirm-close-dialog` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should assign the `confirm-close-dialog` element to the variable `confirmCloseDialog`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `open-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `open-task-form-btn` element to the variable `openTaskFormBtn`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
index 7bd2f2229e7..236130c3110 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
@@ -14,37 +14,37 @@ You need to access more elements with the `getElementById()` method. This time y
 You should use `getElementById()` to access the `close-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `close-task-form-btn` element to the variable `closeTaskFormBtn`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `add-or-update-task-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should assign the `add-or-update-task-btn` element to the variable `addOrUpdateTaskBtn`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `cancel-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 You should assign the `cancel-btn` element to the variable `cancelBtn`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
index bf3967321bc..f474ba28abc 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
@@ -14,37 +14,37 @@ Next, access the `discard-btn`, `tasks-container`, and `title-input` elements us
 You should use `getElementById()` to access the `discard-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should assign the `discard-btn` element to the variable `discardBtn`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `tasks-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should assign the `tasks-container` element to the variable `tasksContainer`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `title-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 You should assign the `title-input` element to the variable `titleInput`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
index 6a0b2dc5411..8909ccaa2db 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
@@ -14,25 +14,25 @@ The last set of elements you need to get from the HTML file are the `date-input`
 You should use `getElementById()` to access the `date-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should assign the `date-input` element to the variable `dateInput`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `description-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 You should assign the `description-input` element to the variable `descriptionInput`. Não se esqueça de usar `const` para declarar a variável.
 
 ```js
-assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
index ba71d863d38..5a97443145b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
@@ -13,16 +13,40 @@ Use `let` to create a `currentTask` variable and set it to an empty object. This
 
 # --hints--
 
-You should create a `taskData` constant set to an empty array.
+You should have a `const` variable called `taskData`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=/)
 ```
 
-You should use `let` to create an empty `currentTask` object.
+You should assign an array to your `taskData` constant.
 
 ```js
-assert.match(code, /let\s+currentTask\s*=\s*\{\};?/)
+assert.isArray(taskData);
+```
+
+Your `taskData` array should be empty.
+
+```js
+assert.isEmpty(taskData);
+```
+
+You should use `let` to create a `currentTask` variable.
+
+```js
+assert.match(code, /let\s+currentTask/);
+```
+
+You should assign an object to your `currentTask` variable.
+
+```js
+assert.isObject(currentTask);
+```
+
+Your `currentTask` object should be empty.
+
+```js
+assert.isEmpty(currentTask);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
index 7a8b1858f84..d6c6911093e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
@@ -7,9 +7,15 @@ dashedName: step-7
 
 # --description--
 
-Add a `click` event listener to the `closeTaskFormBtn` variable, then use the `showModal()` method on your `confirmCloseDialog` variable. This will display a modal with the `Discard` and `Cancel` buttons.
+The HTML `dialog` element has a `showModal()` method that can be used to display a modal dialog box on a web page.
 
-`showModal()` is a method associated with the HTML `dialog` element. It is used to display a modal dialog box on a web page.
+```js
+dialogElement.showModal();
+```
+
+Add an event listener to the `closeTaskFormBtn` variable and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `showModal()` method on the `confirmCloseDialog` element. This will display a modal with the `Discard` and `Cancel` buttons.
 
 # --hints--
 
@@ -22,13 +28,13 @@ assert.match(code, /closeTaskFormBtn\.addEventListener\(/)
 O "ouvinte" de evento deve "ouvir" o evento de `click`.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `showModal()` method on `confirmCloseDialog`.
+Your event listener's callback function should call the `showModal()` method on the `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1,\s*\(.*\)\s*=>\s*{?\s*confirmCloseDialog\.showModal\(\);?\s*}?\s*\);?/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1,\s*\(.*\)\s*=>\s*(\{\s*confirmCloseDialog\.showModal\(\s*\)\s*;?\s*\}|confirmCloseDialog\.showModal\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
index a96196a6a6c..c88dea07b3d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
@@ -7,11 +7,15 @@ dashedName: step-8
 
 # --description--
 
-If the user clicks the `Cancel` button, you want to cancel the process (close the modal showing the two buttons) so the user can continue editing.
+If the user clicks the `Cancel` button, you want to cancel the process and close the modal so the user can continue editing. The HTML `dialog` element has a `close()` method that can be used to close a modal dialog box on a web page.
 
-Add a `click` event listener to the `cancelBtn` element, then use the `close()` method on the `confirmCloseDialog` variable.
+```js
+dialogElement.close();
+```
 
-`close()` is a method of the window object you can use to close the current window, or a modal you create with the `dialog` element.
+Add an event listener to the `cancelBtn` element and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `close()` method on the `confirmCloseDialog` element.
 
 # --hints--
 
@@ -24,13 +28,13 @@ assert.match(code, /cancelBtn\.addEventListener\(/)
 O "ouvinte" de evento deve "ouvir" o evento de `click`.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `close()` method on `confirmCloseDialog`. Don't use curly braces.
+Your event listener's callback function should call the `close()` method on `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1\,\s*\(\)\s*\s*=>\s*confirmCloseDialog\.close\(\)\s*\);?/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1\s*\,\s*\(\s*\)\s*=>\s*(\{\s*confirmCloseDialog\.close\(\s*\)\s*;?\s*\}|confirmCloseDialog\.close\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
index 9d3837baa88..7d9b3bfe1b0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
@@ -28,19 +28,19 @@ assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1/)
 You should use arrow syntax to set your event listener to an empty pair of curly braces.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 Your event listener should use the `close()` method on `confirmCloseDialog`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?/)
 ```
 
 Your event listener should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
index 0315b6301dc..713ad8386b9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
@@ -22,19 +22,19 @@ assert.match(code, /taskForm\.addEventListener\(/)
 Your event listener should listen for a `submit` event.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1/)
 ```
 
 You should use arrow syntax to set your event listener to an empty pair of curly braces with `e` as the parameter.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
 ```
 
 You should use the `e.preventDefault()` method to stop the browser from reloading the page.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\);?/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
index 5e446edf796..5c8452a21ab 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
@@ -35,13 +35,13 @@ assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 You should pass in `item` as the parameter of the arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === currentTask.id`.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
index 12e67d3c5b5..47988a0154d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
@@ -30,19 +30,19 @@ assert.match(code, /const\s+taskObj\s*=\s*\{\s*id/)
 You should use template strings to get `titleInput.value` as the value of your `id` key and convert it to lowercase.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)/)
 ```
 
 You should use `.split(' ')` on `titleInput.value.toLowerCase()`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(('|")\s{1}\1\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)/)
 ```
 
 You should use `.join('-')` on `titleInput.value.toLowerCase().split(' ')`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
index 4f8234dd43f..2418416f053 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
@@ -20,13 +20,13 @@ Create an `if` statement with the condition `dataArrIndex === -1`. Within the `i
 You should create an `if` statement with the condition `dataArrIndex === -1`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{/)
 ```
 
 Your `if` statement should have `taskData.unshift(taskObj)` in it's body.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}/)
 ```
 
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
index d6010f9af10..b3fdb550606 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
@@ -26,7 +26,7 @@ assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*(\s*\{?\(\s*ta
 You should use addition assignment to set the `innerHTML` of `tasksContainer` to an empty pair of backticks.
 
 ```js
-assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\)?\s*\}?)/)
+assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\s*\)?\s*\}?)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
index d7b430cb2d8..f97c4cb79f7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
@@ -15,7 +15,7 @@ You should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("taskData.forEach")[1].split("});")
-assert.match(splitter[0], /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(splitter[0], /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
index d6feb5aa9c0..f55bda639ce 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
@@ -18,13 +18,13 @@ Use arrow syntax to create a `reset` function and set it to a pair of curly brac
 You should use `const` and arrow syntax to create a `reset` function.
 
 ```js
-assert.match(code, /const\s+reset\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+reset\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 Your `reset` function should be empty.
 
 ```js
-assert.match(reset.toString(), /\(\)\s*\{\s*\}/);
+assert.match(reset.toString(), /\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
index 3c34249b127..1d0a931d766 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
@@ -34,7 +34,7 @@ assert.match(reset.toString(), /descriptionInput\.value\s*=\s*('|")\1;?/)
 You should use `classList` to toggle the class `hidden` on `taskForm`
 
 ```js
-assert.match(reset.toString(), /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(reset.toString(), /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 You should set `currentTask` to an empty object.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
index 4ac08678621..43d3c1e6037 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the `hidden` class on `taskForm`.
 
 ```js
 const splitter = code.split('<button type="button" class="btn">Delete</button>')
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /reset\(\)/)
+assert.match(code, /reset\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
index cf17e3d030b..344ef1196a6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("confirmCloseDialog.close();")
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /confirmCloseDialog\.close\(\);?\s*reset\(\);?/)
+assert.match(code, /confirmCloseDialog\.close\(\s*\);?\s*reset\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
index 8111d6cbe82..f6cb04ad931 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
@@ -16,7 +16,7 @@ To begin, within the `closeTaskFormBtn` event listener, create a `formInputsCont
 You should use `const` to create a variable `formInputsContainValues` with the value `titleInput.value || dateInput.value || descriptionInput.value;`
 
 ```js
-assert.match(code, /const\s+formInputsContainValues\s*=\s*titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value;?/)
+assert.match(code, /const\s+formInputsContainValues\s*=\s*(titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value|titleInput\.value\s*!==\s*null\s*\|\|\s*dateInput\.value\s*!==\s*null\s*\|\|\s*descriptionInput\.value\s*!==\s*null)\;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
index a3a79456395..81ba9bf8772 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
@@ -14,25 +14,25 @@ Create an `if` statement to check if `formInputsContainValues` is true. If `form
 You should create an `if` statement with the condition `formInputsContainValues`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{/)
 ```
 
 The `if` block of your `if` statement should contain `confirmCloseDialog.showModal();`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `reset()` function in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{\s*reset\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{\s*reset\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
index d5fa8955c34..6e9dd1c8a2a 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
@@ -16,7 +16,7 @@ Use arrow syntax to create an `addOrUpdateTask` function. Then move the `dataArr
 You should use `const` and arrow syntax to create an `addOrUpdateTask` function.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should move the `dataArrIndex` variable into the `addOrUpdateTask` function.
@@ -31,7 +31,7 @@ You should move the `taskObj` object into the `addOrUpdateTask` function.
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?/)
 ```
 
-You should move the `if` statement with the condition `dataArrIndex === 1` into your `addOrUpdateTask` function.
+You should move the `if` statement with the condition `dataArrIndex === -1` into your `addOrUpdateTask` function.
 
 ```js
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s*===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?\s*if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\)\s*;?\s*\}\s*\}\s*;?/)
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
index ac4be6bab5f..54aaabf114b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
@@ -14,13 +14,13 @@ Use arrow syntax to create an `updateTaskContainer` function. Then move the `tas
 You should use `const` and arrow syntax to create a `updateTaskContainer` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 You should move `taskData.forEach()` and its content into the `updateTaskContainer()` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\{\s*id,\s*title,\s*date,\s*description\s*\}\)\s*=>\s*{\s*\(tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\)\s*}\s*\);?\s*\};?/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\s*\{\s*id,\s*title,\s*date,\s*description\s*\}\s*\)\s*=>\s*{\s*\(\s*tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\s*\)\s*}\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
index 45ef5597ca2..a3f771b8df7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
@@ -14,13 +14,13 @@ Inside the `addOrUpdateTask` function, call the `updateTaskContainer` and `reset
 You should call the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\)\s*/)
+assert.match(code, /updateTaskContainer\(\s*\)\s*/)
 ```
 
 You should call the `reset` function after calling the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\);?\s*reset\(\);?\s*/)
+assert.match(code, /updateTaskContainer\(\s*\);?\s*reset\(\s*\);?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
index cf9d0722043..65b07bb377c 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
@@ -14,7 +14,7 @@ Now remove the `reset()` call inside the `taskForm` submit event listener and ca
 You should remove `reset()` and call `addOrUpdateTask()`.
 
 ```js
-assert.match(code, /addOrUpdateTask\(\)/)
+assert.match(code, /addOrUpdateTask\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
index b0c266c9d2d..fe5a67f78f8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
@@ -13,16 +13,16 @@ To enable editing and deleting for each task, add an `onclick` attribute to both
 
 # --hints--
 
-You should add `onclick="editTask(this)"` as the first attribute of the edit button.
+You should add `onclick="editTask(this)"` to your edit button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")editTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3\s*>Edit<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')editTask\(\s*this\s*\)\1)[^>]*>Edit<\/button>/);
 ```
 
-You should add `onclick="deleteTask(this)"` as the first attribute of the delete button.
+You should add `onclick="deleteTask(this)"` to your delete button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")deleteTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3>Delete<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')deleteTask\(\s*this\s*\)\1)[^>]*>Delete<\/button>/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
index 79ba7f1f3f8..8fc0641fd88 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable and set its value using the `findIndex()` metho
 You should not alter the `deleteTask` function.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
index 874d431a7b1..0089813c492 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
@@ -30,7 +30,7 @@ Use the `remove()` method to remove the `parentElement` of the `buttonEl` from t
 You should use the `remove()` method to remove the parent element of `buttonEl`.
 
 ```js
-assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\);?/)
+assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\s*\);?/)
 ```
 
 You should use `splice()` on the `taskData` array.
@@ -42,13 +42,13 @@ assert.match(deleteTask.toString(), /taskData\.splice\(/)
 The first argument of your `splice()` method should be `dataArrIndex`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex/)
 ```
 
 The second argument of your `splice()` method should be `1`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex,\s*1\);?/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex,\s*1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
index c53c377d29b..e8a139312bd 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable. For its value, utilize the `findIndex()` metho
 You should not alter the `editTask` function.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
index 4df41c38359..c68f903c2b3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
@@ -14,7 +14,7 @@ Use square bracket notation to retrieve the task to be edited from the `taskData
 You should assign `taskData[dataArrIndex]` to `currentTask`.
 
 ```js
-assert.match(code, /currentTask\s*=\s*taskData\[dataArrIndex\];?/)
+assert.match(code, /currentTask\s*=\s*taskData\s*\[\s*dataArrIndex\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
index c1c59d28315..1b78578d877 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
@@ -14,13 +14,13 @@ At this point, editing a task won't reflect when you submit the task. To make th
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 Your `else` block should have the code `taskData[dataArrIndex] = taskObj`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*taskData\[dataArrIndex\]\s*=\s*taskObj;?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*taskData\s*\[\s*dataArrIndex\s*\]\s*=\s*taskObj;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
index 5ee18ec1b65..c459c489b05 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
@@ -26,13 +26,13 @@ After that, open your browser console and go to the `Applications` tab, select `
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 Your `localStorage.setItem()` should have a value of `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*myTaskArr\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*myTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
index 9f24fed202b..c82e3e3f430 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
@@ -16,13 +16,13 @@ To resolve the issue, wrap the data you're saving in the `JSON.stringify()` meth
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 You should wrap `JSON.stringify()` around `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*JSON\.stringify\(myTaskArr\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*JSON\.stringify\(\s*myTaskArr\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
index afab1be5de6..16e673d2218 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
@@ -16,13 +16,13 @@ Use the `getItem()` method to retrieve the `myTaskArr` array and assign it to th
 You should use `const` to create a `getTaskArr` variable and assign `localStorage.getItem("data")` to it.
 
 ```js
-assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(('|")data\1\);?/)
+assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\1\s*\);?/)
 ```
 
 You should log the `getTaskArr` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArr\);?/)
+assert.match(code, /console\.log\(\s*getTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
index dcbd9ea5f80..2f09e41aa3f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
@@ -18,13 +18,13 @@ Check the console to see the difference between `getTaskArr` and `getTaskObj`.
 You should use `const` to create a `getTaskArrObj` variable and assign it to `JSON.parse(localStorage.getItem('data'));`.
 
 ```js
-assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\);?/)
+assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\);?/)
 ```
 
 You should log the `getTaskArrObj` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArrObj\);?/)
+assert.match(code, /console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
index 11a5b0fe826..04d8bf67798 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
@@ -16,7 +16,7 @@ Remove the `data` item from local storage and open the console to observe the re
 You should use `localStorage.removeItem()` to remove the `data` item from the browser's local storage.
 
 ```js
-assert.match(code, /localStorage\.removeItem\(('|")data\1\);?/)
+assert.match(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
index 1e402cadb9a..0300310d9be 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
@@ -16,13 +16,13 @@ Remove `localStorage.removeItem()` and use `localStorage.clear()` instead. You d
 You should remove `localStorage.removeItem("data")`.
 
 ```js
-assert.notMatch(code, /localStorage\.removeItem\(('|")data\1\);/)
+assert.notMatch(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);/)
 ```
 
 You should remove everything from the browser `local storage` with `localStorage.clear()`.
 
 ```js
-assert.match(code, /localStorage\.clear\(\);?/)
+assert.match(code, /localStorage\.clear\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
index 248055ea722..1414b27cdce 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
@@ -14,7 +14,7 @@ Remove the `myTaskArr` array and all of the code for `localStorage` because you
 You should remove `myTaskArr` and all the code related to `localStorage` that you've just learned.
 
 ```js
-assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s"Walk\s*the\s*Dog",\s*date:\s*"22-04-2022"\s*\},\s*\{\s*task:\s"Read\s*some\s*books",\s*date:\s*"02-11-2023"\s*\},\s*\{\s*task:\s"Watch\s*football",\s*date:\s*"10-08-2021"\s*\},\s*\];?\s*localStorage\.setItem\("data", JSON\.stringify\(myTaskArr\)\);\s*localStorage\.clear\(\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\("data"\)\s*console\.log\(getTaskArr\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\("data"\)\);?\s*console\.log\(getTaskArrObj\);?/)
+assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s('|")Walk\s*the\s*Dog\1,\s*date:\s*('|")22-04-2022\2\s*\},\s*\{\s*task:\s('|")Read\s*some\s*books\3,\s*date:\s*('|")02-11-2023\4\s*\},\s*\{\s*task:\s('|")Watch\s*football\5,\s*date:\s*('|")10-08-2021\6\s*\},\s*\]\s*;?\s*localStorage\.setItem\(('|")data\7, JSON\.stringify\(\s*myTaskArr\s*\)\s*\);\s*localStorage\.clear\(\s*\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\8\s*\)\s*console\.log\(\s*getTaskArr\s*\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\9\s*\)\s*\);?\s*console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
@@ -316,7 +316,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -346,7 +346,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
index 94271407a93..26978f2cf09 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
@@ -24,13 +24,13 @@ assert.match(code, /localStorage\.setItem\(/)
 You should pass in `"data"` as the first argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
index ed63554299b..2f1605a7f70 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
@@ -24,14 +24,14 @@ You should pass in `"data"` as the first argument of your `localStorage.setItem(
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
index 2c75c2605f4..c8689d3254b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
@@ -16,7 +16,7 @@ Set `taskData` to the retrieval of `data` from local storage **or** an empty arr
 You should set the `taskData` variable to `JSON.parse(localStorage.getItem("data")) || [];`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\)\s*\|\|\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\)\s*\|\|\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -321,7 +321,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -352,7 +352,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
index f63baf18255..8d1a009e6f4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
@@ -20,13 +20,13 @@ With that, you've completed this project.
 You should create an `if` statement with `(taskData.length)` as the condition. As a reminder, `0` is a falsy value.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*/)
 ```
 
 You should call the `updateTaskContainer` function in your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*updateTaskContainer\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*updateTaskContainer\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
index 98737c2eb1f..5f6f115b598 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
@@ -20,7 +20,7 @@ console.log(Date.now()); // 1628586800000
 You should attach `-${Date.now()}` to the existing value of the `id` key. Don't forget it needs to be inside the template string.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
index 68919e93852..010f5dae40d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
@@ -1,32 +1,18 @@
 ---
 id: 63e02a333354343b595d64ca
-title: Passo 16
+title: Step 15
 challengeType: 0
-dashedName: step-16
+dashedName: step-15
 ---
 
 # --description--
 
-Agora que você testou o método `Object.freeze()`, pode excluir essas duas linhas de código da última lição.
-
 O próximo passo é acessar a chave chamada `sport` do objeto `myFavoriteFootballTeam` e atribuir a ela uma nova variável `const` chamada `sport`.
 
 Lembre-se de que você pode usar notação de ponto para isso.
 
 # --hints--
 
-Você deve atribuir a atribuição da string `USA` a `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /myFavoriteFootballTeam\.team\s*=\s*('|"|`)USA\1\s*/);
-```
-
-Você deve remover o `console.log` que exibe `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /console\.log\(\s*myFavoriteFootballTeam\.team\s*\)/);
-```
-
 Você deve usar `const` para declarar uma variável `sport`.
 
 ```js
@@ -462,8 +448,6 @@ Object.freeze(myFavoriteFootballTeam);
 
 --fcc-editable-region--
 
-myFavoriteFootballTeam.team = "USA";
-console.log(myFavoriteFootballTeam.team);
 
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
index b37934ef98d..64e95bd52dd 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
@@ -1,8 +1,8 @@
 ---
 id: 63e0334b7a24bd3c96aca4de
-title: Passo 17
+title: Step 16
 challengeType: 0
-dashedName: step-17
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
index 489d911fa1a..f7e16098cb4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e036373fc9173d284e165a
-title: Passo 18
+title: Step 17
 challengeType: 0
-dashedName: step-18
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
index 876dae1f224..bf76fb9169f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
@@ -1,8 +1,8 @@
 ---
 id: 63e03b86008bbb3e1c3de846
-title: Passo 19
+title: Step 18
 challengeType: 0
-dashedName: step-19
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
index 1837a995899..702cbe1f917 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
@@ -1,8 +1,8 @@
 ---
 id: 63e042661ad2663f0d468740
-title: Passo 20
+title: Step 19
 challengeType: 0
-dashedName: step-20
+dashedName: step-19
 ---
 
 # --description--
@@ -15,7 +15,7 @@ Use a desestruturação de objetos para acessar o valor de `coachName`.
 
 ```js
 
-assert.match(code, /const\s*{\s*coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach\s*/)
+assert.match(code, /const\s*{\s*(coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach|headCoach\s*:\s*{\s*coachName\s*}\s*}\s*=\s*myFavoriteFootballTeam)\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
index 3b5babcc240..dbbb0d3f13d 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
@@ -1,8 +1,8 @@
 ---
 id: 63e050bf935ac341b88326d6
-title: Passo 21
+title: Step 20
 challengeType: 0
-dashedName: step-21
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
index 7d90525f0d7..3562608e3f9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05557016dfd45ea49152c
-title: Passo 22
+title: Step 21
 challengeType: 0
-dashedName: step-22
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
index 862808b336e..70772e4cba9 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05c00b615bb46ac87273a
-title: Passo 23
+title: Step 22
 challengeType: 0
-dashedName: step-23
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
index c1f5ad60199..1f3d7585f20 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
@@ -1,8 +1,8 @@
 ---
 id: 63e060df21bca347b2d2b374
-title: Passo 24
+title: Step 23
 challengeType: 0
-dashedName: step-24
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
index a932bda5d6c..83c1e39cf39 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e062d6090ebb486a4eda3a
-title: Passo 25
+title: Step 24
 challengeType: 0
-dashedName: step-25
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
index 2ca5b0e3ba8..640ce15c640 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
@@ -1,8 +1,8 @@
 ---
 id: 63e949b8327aa2aca2ca8eac
-title: Passo 26
+title: Step 25
 challengeType: 0
-dashedName: step-26
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
index b3c1e0e614b..e7f4acea3b7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
@@ -1,8 +1,8 @@
 ---
 id: 63e94dae6dcedbad73f2f6ee
-title: Passo 27
+title: Step 26
 challengeType: 0
-dashedName: step-27
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
index 5fb12fcc94c..f3359f9b833 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
@@ -1,8 +1,8 @@
 ---
 id: 63e954321b0a77ae4f6d9650
-title: Passo 28
+title: Step 27
 challengeType: 0
-dashedName: step-28
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
index 4d4347cf5b8..bf772795e61 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95a45dce95baf41dd4f78
-title: Passo 29
+title: Step 28
 challengeType: 0
-dashedName: step-29
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
index 49a06ff7a77..5628c55e1c5 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95e39860dc5b01ebe9be0
-title: Passo 30
+title: Step 29
 challengeType: 0
-dashedName: step-30
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
index fa5c5c2db30..07d11c2e09f 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9667c881b61b1e338d276
-title: Passo 31
+title: Step 30
 challengeType: 0
-dashedName: step-31
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
index 989b4df1727..9746fb8fad8 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96938d2a347b2734a1587
-title: Passo 32
+title: Step 31
 challengeType: 0
-dashedName: step-32
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
index 6b14653463e..8ee191de669 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96eb94c97b6b31ee50f63
-title: Passo 33
+title: Step 32
 challengeType: 0
-dashedName: step-33
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
index 2d683f8b14c..1edc2d1c1aa 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9718d7d490bb3940d5a0a
-title: Passo 34
+title: Step 33
 challengeType: 0
-dashedName: step-34
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
index 22f713be4cb..af4176dd433 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9737f686c76b4078a60f4
-title: Passo 35
+title: Step 34
 challengeType: 0
-dashedName: step-35
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
index ad16a676810..45bd31ee626 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28972973504e7bb58b0b3
-title: Passo 36
+title: Step 35
 challengeType: 0
-dashedName: step-36
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
index f333c286e5e..1bc88fbc1c7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28ef082d771e8bf71f94a
-title: Passo 37
+title: Step 36
 challengeType: 0
-dashedName: step-37
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
index 37ec2952e68..6ebe97c587e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
@@ -1,8 +1,8 @@
 ---
 id: 63f293c804d6f9e9a83ca4c5
-title: Passo 38
+title: Step 37
 challengeType: 0
-dashedName: step-38
+dashedName: step-37
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Abra o console e faça uma seleção no menu suspenso de jogadores da equipe. Vo
 Você deve adicionar um `console.log` com o valor de `e.target.value`.
 
 ```js
-assert.match(code, /console\.log\s*\(e\.target\.value\)\s*/)
+assert.match(code, /console\.log\s*\(\s*e\.target\.value\s*\)\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
index a7c4d3bd23e..8710ab0586e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29804e3ec00ea6fab1ec4
-title: Passo 39
+title: Step 38
 challengeType: 0
-dashedName: step-39
+dashedName: step-38
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Dentro da função de callback, acesse a propriedade `innerHTML` do elemento `pl
 Você não deve mais ter uma instrução `console.log` no código.
 
 ```js
-assert.notMatch(code, /\s*console\.log\(e\.target\.value\)/);
+assert.notMatch(code, /\s*console\.log\(\s*e\.target\.value\s*\)/);
 ```
 
 Você deve acessar a propriedade `innerHTML` do elemento `playerCards`.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
index 1bc15d3addb..acb139ff6dc 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29ce62aea65eb041758c8
-title: Passo 40
+title: Step 39
 challengeType: 0
-dashedName: step-40
+dashedName: step-39
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /switch\s*\(\s*e\.target\.value\s*\)/);
 A instrução `switch` deve estar vazia.
 
 ```js
-assert.match(code, /\s*switch\s*\(e\.target\.value\)\s*{\s*}/);
+assert.match(code, /\s*switch\s*\(\s*e\.target\.value\s*\)\s*{\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
index c969a392f07..3b1f060c300 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a0a860790eebe61bf908
-title: Passo 41
+title: Step 40
 challengeType: 0
-dashedName: step-41
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
index bd926e8b55f..b7dd6e5d18e 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a4a8087e6dec8ec47f16
-title: Passo 44
+title: Step 43
 challengeType: 0
-dashedName: step-44
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
index e03fee444b8..2c7e01eb8b3 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a5f09a785aed155c0a56
-title: Passo 45
+title: Step 44
 challengeType: 0
-dashedName: step-45
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
index 7e1a851be67..143636b1480 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a8e14fb388edd3242527
-title: Passo 46
+title: Step 45
 challengeType: 0
-dashedName: step-46
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
index c643ace0ed6..75cbf955cba 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2aa36fcdc63ee4e18fc37
-title: Passo 47
+title: Step 46
 challengeType: 0
-dashedName: step-47
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
index 214450e4fe1..d917c4c8e00 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2ab4f6c52c5eec6d68de4
-title: Passo 48
+title: Step 47
 challengeType: 0
-dashedName: step-48
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
index 09a3ef976db..3f52f457098 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
@@ -1,8 +1,8 @@
 ---
 id: 641fc88d8fa7127f76e0324f
-title: Passo 42
+title: Step 41
 challengeType: 0
-dashedName: step-42
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
index c60a57927c5..d15b6b7be99 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
@@ -1,8 +1,8 @@
 ---
 id: 641fcfd468185384ac218b7d
-title: Passo 43
+title: Step 42
 challengeType: 0
-dashedName: step-43
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
index 48aa19965c8..22f96c302ce 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-After alerting the user if the number input is empty of the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
+After alerting the user if the number input is empty or the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
 
 Add the `return` keyword after `alert()`.
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
index 18b45c912a1..dc016f9af28 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
@@ -24,7 +24,6 @@ Use the `.reverse()` method to reverse the order of the `remainders` array, and
 You should use the `.reverse()` method on the `remainders` array.
 
 ```js
-console.log(String(decimalToBinary))
 assert.match(String(decimalToBinary), /remainders\.reverse\(\s*\)/);
 ```
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
index 1bcce608029..dc811a1efbb 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
@@ -31,7 +31,7 @@ assert.notMatch(String(decimalToBinary), /else\s+if\s*\([\s\S]+\)/);
 Your `decimalToBinary()` function should have an `if` statement that checks if `input` is equal to `0` or `1`.
 
 ```js
-assert.match(String(decimalToBinary), /if\s*\(input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
+assert.match(String(decimalToBinary), /if\s*\(\s*input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(\s*input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
 ```
 
 If input is equal to `0` or `1`, your `decimalToBinary()` function should return `String(input)`.
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
index 7695b060faa..1bb6a396444 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
@@ -44,7 +44,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1000` as the second argument to the `setTimeout` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
index 631e9cc265f..69f3d083a46 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
@@ -48,7 +48,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
index 1ae4ef02d71..31b8157ec46 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
@@ -46,7 +46,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
index 70ed01748da..40d1ce96c55 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the `id` attribute to the `inputVal`
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
index 75db5f63c7b..7e143ed5748 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the text of the paragraph element to
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
index 052cca144d5..dfab69bbfe0 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `showMsgDelay` property of the c
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)showMsgDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)showMsgDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
index d53163cbc03..9f7c41f9a52 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
@@ -18,7 +18,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
index 5faa003317e..09a6b2d6d86 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
@@ -27,7 +27,7 @@ You should set the `textContent` property of the targeted element equal to the `
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\[\s*('|"|`)\s*msg\s*\1\s*\]/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\s*\[\s*('|"|`)\s*msg\s*\1\s*\]/
 );
 ```
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
index f4f74b49668..c29a030de42 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `removeElDelay` property of the
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)removeElDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)removeElDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
index 1581ac94687..809495fcce7 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
@@ -16,7 +16,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.lengthOf(
   String(showAnimation).match(
-    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
+    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
   ),
   2
 );
@@ -27,7 +27,7 @@ You should chain the `.remove()` method to the `.getElementById()` method.
 ```js
 assert.match(
   String(showAnimation),
-  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
+  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
 );
 ```
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
index 9a23155ef67..dcd2bd7d193 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
@@ -18,7 +18,7 @@ You should set the `textContent` property of `result` equal to calling `decimalT
 ```js
 assert.match(
   String(showAnimation),
-  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\[('|"|`)textContent\1\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
+  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\s*\[\s*('|"|`)textContent\1\s*\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
 );
 ```
 
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
index 89ef32d9537..4b1f93a9ff6 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
@@ -9,9 +9,9 @@ dashedName: step-5
 
 No ouvinte do evento, você precisa atualizar o texto do elemento `result`.
 
-Use um operador ternário para atualizar o texto do elemento `result` após a instrução `if`. Verifique se o valor do elemento `messageInput` é verdadeiro ao chamar `isSpam()`. Se for, defina o texto para `Oh no! This looks like a spam message.`. Caso contrário, defina o texto como `This message does not seem to contain any spam.`
+After the `if` statement, use a ternary operator to check the truthiness of calling `isSpam()` with `messageInput.value` as the argument. If true, set the `textContent` property on the `result` element to `Oh no! This looks like a spam message.`. Otherwise, set it to `This message does not seem to contain any spam.`
 
-Em seguida, defina o valor do elemento `messageInput` como uma string vazia.
+Then set the `messageInput` element's `value` property to an empty string.
 
 # --hints--
 
@@ -21,10 +21,10 @@ Você deve usar o operador da atribuição para definir a propriedade `textConte
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*/)
 ```
 
-Você deve atribuir a chamada da função `isSpam()` para `result.textContent`.
+You should call the `isSpam()` function after the assignment operator `=` and before the `?` ternary operator.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(.*\)\s*\?/)
 ```
 
 Você deve usar a sintaxe de operador ternário para verificar se `isSpam(messageInput.value)` é verdadeiro.
@@ -45,10 +45,10 @@ A expressão falsa do operador ternário deve definir a propriedade `textContent
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*/);
 ```
 
-Após o operador ternário, defina `value` em `messageInput` como uma string vazia.
+After your ternary, set the `value` property on the `messageInput` element to an empty string.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5\s*;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
index 985366b00ac..b456b136116 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
@@ -24,13 +24,13 @@ assert.match(code, /const\s+currentDateParagraph\s+=/);
 You should use `document.getElementById()` to get the `#current-date` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)current-date\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)current-date\1\s*\)/);
 ```
 
 You should assign the `#current-date` element to your `currentDateParagraph` variable.
 
 ```js
-assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(('|"|`)current-date\1\)/g));
+assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(\s*('|"|`)current-date\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
index 8bb24707eed..0f95f247774 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+dateOptionsSelectElement\s+=/);
 You should use `document.getElementById()` to get the `#date-options` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)date-options\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)date-options\1\s*\)/);
 ```
 
 You should assign the `#date-options` element to your `dateOptionsSelectElement` variable.
 
 ```js
-assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(('|"|`)date-options\1\)/g));
+assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(\s*('|"|`)date-options\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
index 33bcc345e9b..c561eca624b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
@@ -32,7 +32,7 @@ assert.match(code, /const\s+date\s+=/);
 You should assign a `Date` object to your `date` variable with `new Date()`.
 
 ```js
-assert(code.match(/const\s+date\s+=\s+new\s+Date\(\)/g));
+assert(code.match(/const\s+date\s+=\s+new\s+Date\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
index def2776afa4..3e285e8ea9b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
@@ -30,7 +30,7 @@ assert.match(code, /const\s+day\s+=/);
 You should assign the `date.getDate()` to your `day` variable.
 
 ```js
-assert(code.match(/const\s+day\s+=\s+date\.getDate\(\)/g));
+assert(code.match(/const\s+day\s+=\s+date\.getDate\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
index ec4078f578a..527eee08667 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+month\s+=/);
 You should assign the `date.getMonth() + 1` to your `month` variable.
 
 ```js
-assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\)\s*\+\s*1/g));
+assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\s*\)\s*\+\s*1/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
index 5e8722e2bbe..4e9b08cfbf4 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+year\s+=/);
 You should assign the `date.getFullYear()` to your `year` variable.
 
 ```js
-assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\)/g));
+assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
index 6d544859aec..9a57d5ae2e1 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+hours\s+=/);
 You should assign the `date.getHours()` to your `hours` variable.
 
 ```js
-assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\)/g));
+assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
index c0997b24648..bff4b1deabd 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+minutes\s+=/);
 You should assign the `date.getMinutes()` to your `minutes` variable.
 
 ```js
-assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\)/g));
+assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
index c8560558bb6..38a0b9e4e4b 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
@@ -16,7 +16,7 @@ Open up the console and you should see the date printed out.
 You should have a `console.log(formattedDate)` line in your code.
 
 ```js
-assert.match(code, /console\.log\(formattedDate\)/);
+assert.match(code, /console\.log\(\s*formattedDate\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
index 959e5393d12..33ac4cb3aca 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
@@ -22,7 +22,7 @@ assert(code.match(/currentDateParagraph\.textContent\s*=\s*formattedDate/g));
 You should not have a `console.log(formattedDate);` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(formattedDate\);/);
+assert.notMatch(code, /console\.log\(\s*formattedDate\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
index 55bb810b647..c1d9eefbacd 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
@@ -15,11 +15,17 @@ element.addEventListener("change", () => {
 });
 ```
 
-Chain the `addEventListener` method to `dateOptionsSelectElement` where the first argument is `change` and the second argument is an empty arrow function.
+Attach the `addEventListener` method to the `dateOptionsSelectElement`. The first argument of the event listener should be the string `change` and the second argument should be an empty arrow function.
 
 # --hints--
 
-You should use the `addEventListener` method to add a `change` event listener to `dateOptionsSelectElement`.
+You should attach the `addEventListener` method to the `dateOptionsSelectElement`.
+
+```js
+assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(/g));
+```
+
+Your event listener should listen for a `change` event.
 
 ```js
 assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(\s*('|")change\1/g));
diff --git a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
index 22af88977e7..816359da073 100644
--- a/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
+++ b/curriculum/challenges/portuguese/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
@@ -22,7 +22,7 @@ Chain the `.reverse()` method to the end of `.split()` method.
 You should use the `.reverse()` method to reverse the order of the array returned by `.split()`.
 
 ```js
-assert(code.match(/\.reverse\(\)/g));
+assert(code.match(/\.reverse\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/portuguese/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md b/curriculum/challenges/portuguese/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
index 52383a96fba..7571451d9e3 100644
--- a/curriculum/challenges/portuguese/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
+++ b/curriculum/challenges/portuguese/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
@@ -109,7 +109,6 @@ assert(getCorrectStyle()?.textAlign === 'center');
 # --seed--
 
 ## --seed-contents--
-
 ```css
 ```
 
diff --git a/curriculum/challenges/portuguese/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md b/curriculum/challenges/portuguese/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
index 270fc577f8d..b4cd7618383 100644
--- a/curriculum/challenges/portuguese/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
+++ b/curriculum/challenges/portuguese/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
@@ -29,4 +29,4 @@ They are outdated technologies.
 
 ## --video-solution--
 
-1
+2
diff --git a/curriculum/challenges/portuguese/17-college-algebra-with-python/build-a-data-graph-explorer-project/build-a-data-graph-explorer.md b/curriculum/challenges/portuguese/17-college-algebra-with-python/build-a-data-graph-explorer-project/build-a-data-graph-explorer.md
index 0c8fcdb474e..24a307f0015 100644
--- a/curriculum/challenges/portuguese/17-college-algebra-with-python/build-a-data-graph-explorer-project/build-a-data-graph-explorer.md
+++ b/curriculum/challenges/portuguese/17-college-algebra-with-python/build-a-data-graph-explorer-project/build-a-data-graph-explorer.md
@@ -13,7 +13,7 @@ Depois de completar o projeto, envie o link dele abaixo. Se você estiver envian
 
 # --instructions--
 
-For this challenge, you need to create a data graph explorer using Python that take input and do the following:
+Para este desafio, você precisará criar um explorador de gráficos de dados usando Python que receberá entradas e fará o seguinte:
 
 - Obter um arquivo .csv de três maneiras
   - enviando pelo computador local
diff --git a/curriculum/challenges/portuguese/17-college-algebra-with-python/build-a-financial-calculator-project/build-a-financial-calculator.md b/curriculum/challenges/portuguese/17-college-algebra-with-python/build-a-financial-calculator-project/build-a-financial-calculator.md
index 7c5b95cace8..3fb1ed3a071 100644
--- a/curriculum/challenges/portuguese/17-college-algebra-with-python/build-a-financial-calculator-project/build-a-financial-calculator.md
+++ b/curriculum/challenges/portuguese/17-college-algebra-with-python/build-a-financial-calculator-project/build-a-financial-calculator.md
@@ -13,7 +13,7 @@ Depois de acessar o link, crie uma cópia do notebook em sua conta pessoal ou lo
 
 # --instructions--
 
-For this challenge, you need to create a financial calculator using Python that take input and do the following:
+Para este desafio, você precisará criar uma calculadora financeira usando Python que receberá entradas e fará o seguinte:
 
 - Calcular a anuidade com crescimento mensal ou contínuo
 - Calcular o pagamento mensal de hipoteca
diff --git a/curriculum/challenges/portuguese/18-project-euler/project-euler-problems-1-to-100/problem-1-multiples-of-3-or-5.md b/curriculum/challenges/portuguese/18-project-euler/project-euler-problems-1-to-100/problem-1-multiples-of-3-or-5.md
index 528374591af..c1084b7a4d7 100644
--- a/curriculum/challenges/portuguese/18-project-euler/project-euler-problems-1-to-100/problem-1-multiples-of-3-or-5.md
+++ b/curriculum/challenges/portuguese/18-project-euler/project-euler-problems-1-to-100/problem-1-multiples-of-3-or-5.md
@@ -1,6 +1,6 @@
 ---
 id: 5900f36e1000cf542c50fe80
-title: 'Problem 1: Multiples of 3 or 5'
+title: 'Problema 1: Múltiplos de 3 ou 5'
 challengeType: 1
 forumTopicId: 301722
 dashedName: problem-1-multiples-of-3-or-5
@@ -14,31 +14,31 @@ Calcule a soma de todos os múltiplos de 3 ou 5 menor que o parâmetro `number`.
 
 # --hints--
 
-`multiplesOf3Or5(10)` should return a number.
+`multiplesOf3Or5(10)` deve retornar um número.
 
 ```js
 assert(typeof multiplesOf3Or5(10) === 'number');
 ```
 
-`multiplesOf3Or5(49)` should return 543.
+`multiplesOf3Or5(49)` deve retornar 543.
 
 ```js
 assert.strictEqual(multiplesOf3Or5(49), 543);
 ```
 
-`multiplesOf3Or5(1000)` should return 233168.
+`multiplesOf3Or5(1000)` deve retornar 233168.
 
 ```js
 assert.strictEqual(multiplesOf3Or5(1000), 233168);
 ```
 
-`multiplesOf3Or5(8456)` should return 16687353.
+`multiplesOf3Or5(8456)` deve retornar 16687353.
 
 ```js
 assert.strictEqual(multiplesOf3Or5(8456), 16687353);
 ```
 
-`multiplesOf3Or5(19564)` should return 89301183.
+`multiplesOf3Or5(19564)` deve retornar 89301183.
 
 ```js
 assert.strictEqual(multiplesOf3Or5(19564), 89301183);
diff --git a/curriculum/challenges/portuguese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code.md b/curriculum/challenges/portuguese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code.md
index 95290f99fb9..f5155216ce3 100644
--- a/curriculum/challenges/portuguese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code.md
+++ b/curriculum/challenges/portuguese/19-foundational-c-sharp-with-microsoft/debug-c-sharp-console-applications/challenge-project-debug-a-c-sharp-console-application-using-visual-studio-code.md
@@ -20,7 +20,7 @@ Complete o projeto de desafio <a href="https://learn.microsoft.com/training/modu
 
 ## --text--
 
-Which of the following options can be used to set a breakpoint in Visual Studio Code?
+Qual das seguintes opções pode ser usada para definir um ponto de interrupção no Visual Studio Code?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/20-upcoming-python/learn-python-by-building-a-blackjack-game/64b163c20e59cbd4a64940b0.md b/curriculum/challenges/portuguese/20-upcoming-python/learn-python-by-building-a-blackjack-game/64b163c20e59cbd4a64940b0.md
index 0f9f13a5171..fdc880cb435 100644
--- a/curriculum/challenges/portuguese/20-upcoming-python/learn-python-by-building-a-blackjack-game/64b163c20e59cbd4a64940b0.md
+++ b/curriculum/challenges/portuguese/20-upcoming-python/learn-python-by-building-a-blackjack-game/64b163c20e59cbd4a64940b0.md
@@ -19,7 +19,7 @@ Somar 3 e 5 deve retornar 8.
 })
 ```
 
-Test value of `__name__`
+Teste o valor de `__name__`
 
 ```js
 ({
@@ -27,7 +27,7 @@ Test value of `__name__`
 })
 ```
 
-Test __locals and __pyodide
+Teste __locals e __pyodide
 
 ```js
 ({
@@ -35,7 +35,7 @@ Test __locals and __pyodide
 })
 ```
 
-Test cleaner syntax
+Teste a sintaxe limpa
 
 ```js
 ({
@@ -43,7 +43,7 @@ Test cleaner syntax
 })
 ```
 
-Testing getDef
+Testando getDef
 
 ```js
 ({
diff --git a/curriculum/challenges/portuguese/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md b/curriculum/challenges/portuguese/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
index 893c0c52284..de413ca6fa4 100644
--- a/curriculum/challenges/portuguese/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
+++ b/curriculum/challenges/portuguese/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
@@ -1,5 +1,5 @@
 ---
-id: 657e0d0037192f3d9e3d5417 
+id: 657e0d0037192f3d9e3d5417
 title: Task 128
 challengeType: 22
 dashedName: task-128
diff --git a/curriculum/challenges/portuguese/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md b/curriculum/challenges/portuguese/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
index 6313d14dc72..bfddd0d2e47 100644
--- a/curriculum/challenges/portuguese/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
+++ b/curriculum/challenges/portuguese/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
@@ -13,7 +13,7 @@ Bob: Alright, team. This is Alice's first day with _ , so please let _ introduce
 -->
 # --description--
 
-You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sould more natural. Listen for the object pronouns Bob uses in this audio.
+You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sound more natural. Listen for the object pronouns Bob uses in this audio.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/100-doors.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/100-doors.md
index 018b6fda1cf..28d15435555 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/100-doors.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/100-doors.md
@@ -8,7 +8,7 @@ dashedName: 100-doors
 
 # --description--
 
-There are 100 doors in a row that are all initially closed. You make 100 passes by the doors. The first time through, visit every door and 'toggle' the door (if the door is closed, open it; if it is open, close it). The second time, only visit every 2nd door (i.e., door #2, #4, #6, ...) and toggle it. The third time, visit every 3rd door (i.e., door #3, #6, #9, ...), etc., until you only visit the 100th door.
+Há 100 portas seguidas que estão todas fechadas inicialmente. Você faz 100 passagens pelas portas. A primeira vez que passar, visite todas as portas e 'alterne' a porta (se a porta estiver fechada, abra-a; se estiver aberta, feche-a). Na segunda vez, só visite as portas pares (ou seja, as porta 2, 4, 6, ...) e alterne-as. Na terceira vez, visite as portas de 3 em 3 (por exemplo, as portas 3, 6, 9, ...), até que você só visite a porta 100.
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/24-game.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/24-game.md
index 4433d53cc60..7817742a6d8 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/24-game.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/24-game.md
@@ -8,7 +8,7 @@ dashedName: 24-game
 
 # --description--
 
-The 24 Game tests a person's mental arithmetic.
+O jogo do 24 testa a aritmética mental de uma pessoa.
 
 O objetivo do jogo é organizar quatro números de maneira que, quando avaliados, o resultado seja 24
 
@@ -18,13 +18,13 @@ Implemente uma função que receba uma string de quatro algarismos como argument
 
 **Regras:**
 <ul>
-  <li> Only the following operators/functions are allowed: multiplication, division, addition, subtraction. </li>
+  <li> Apenas os operadores/funções seguintes são permitidos: multiplicação, divisão, adição, subtração. </li>
   <li> A divisão deve usar o ponto flutuante ou a aritmética de racionais, etc., para preservar os restos. </li>
   <li> Formar números com mais de um dígito a partir dos que foram fornecidos não é permitido. (Portanto, uma resposta de 12+12 quando for fornecido 1, 2, 2 e 1 está errada). </li>
   <li> A ordem dos dígitos fornecida não precisa ser preservada. </li>
 </ul>
 
-| Example input             | Exemplo de saída          |
+| Exemplo de entrada        | Exemplo de saída          |
 | ------------------------- | ------------------------- |
 | <code>solve24("4878");</code> | <code>(7-8/8)\*4</code> |
 | <code>solve24("1234");</code> | <code>3\*1\*4\*2</code> |
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/9-billion-names-of-god-the-integer.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/9-billion-names-of-god-the-integer.md
index 49f5f11099a..a037f243aa4 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/9-billion-names-of-god-the-integer.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/9-billion-names-of-god-the-integer.md
@@ -8,14 +8,14 @@ dashedName: 9-billion-names-of-god-the-integer
 
 # --description--
 
-This task is a variation of the short story by Arthur C. Clarke.
+Esta tarefa é uma variação de um conto de Arthur C. Clarke.
 
 (Quem chegar à solução deve estar ciente das consequências de concluir esta tarefa.)
 
 Em detalhes, para especificar o que significa um "nome":
 
 <ul>
-  <li>The integer 1 has 1 name "1".</li>
+  <li>O inteiro 1 tem 1 nome: "1".</li>
   <li>O inteiro 2 tem 2 nomes: "1+1" e "2".</li>
   <li>O inteiro 3 tem 3 nomes: "1+1+1", "2+1" e "3".</li>
   <li>O inteiro 4 tem 5 nomes: "1+1+1+1", "2+1+1", "2+2", "3+1", "4".</li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/abc-problem.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/abc-problem.md
index a179b1b4594..f683a84d24f 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/abc-problem.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/abc-problem.md
@@ -8,7 +8,7 @@ dashedName: abc-problem
 
 # --description--
 
-You are given a collection of ABC blocks (e.g., childhood alphabet blocks). There are 20 blocks with two letters on each block. A complete alphabet is guaranteed amongst all sides of the blocks. The sample collection of blocks:
+Você recebe uma coleção de blocos ABC (por exemplo, blocos de alfabeto de infância). Há 20 blocos com duas letras em cada bloco. Um alfabeto completo é garantido entre todos os lados dos blocos. A coleção de amostra de blocos:
 
 <pre>(B O)
 (X K)
@@ -39,7 +39,7 @@ Implemente uma função que recebe uma string (palavra) e determina se a palavra
 Algumas regras para se ter em mente:
 
 <ul>
-  <li>Once a letter on a block is used, that block cannot be used again.</li>
+  <li>Quando uma letra em um bloco é usada, esse bloco não pode ser usado novamente.</li>
   <li>A função não deve distinguir maiúsculas e minúsculas.</li>
 </ul>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/abundant-deficient-and-perfect-number-classifications.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/abundant-deficient-and-perfect-number-classifications.md
index af78ac1debc..8ce29e8dec3 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/abundant-deficient-and-perfect-number-classifications.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/abundant-deficient-and-perfect-number-classifications.md
@@ -8,7 +8,7 @@ dashedName: abundant-deficient-and-perfect-number-classifications
 
 # --description--
 
-These define three classifications of positive integers based on their proper divisors.
+Estas classificações definem três categorias de inteiros positivos com base nos seus divisores.
 
 Vamos considerar que $P(n)$ é a soma dos divisores apropriados de `n`, onde todos os divisores adequados são inteiros positivos `n` diferentes de `n`.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/accumulator-factory.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/accumulator-factory.md
index 8e993acced8..74368ef8c46 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/accumulator-factory.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/accumulator-factory.md
@@ -8,7 +8,7 @@ dashedName: accumulator-factory
 
 # --description--
 
-A problem posed by Paul Graham is that of creating a function that takes a single (numeric) argument and which returns another function that is an accumulator. The returned accumulator function in turn also takes a single numeric argument, and returns the sum of all the numeric values passed in so far to that accumulator (including the initial value passed when the accumulator was created).
+Um problema proposto por Paul Graham é o de criar uma função que recebe um único argumento (numérico) e que retorna outra função que é um acumulador. A função de acumulador retornada, por sua vez, também recebe um único argumento numérico e retorna a soma de todos os valores numéricos passados até aquele momento para esse acumulador (incluindo o valor inicial passado quando o acumulador foi criado).
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/ackermann-function.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/ackermann-function.md
index d9c8ef36b4f..9fd164cf69d 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/ackermann-function.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/ackermann-function.md
@@ -8,7 +8,7 @@ dashedName: ackermann-function
 
 # --description--
 
-The Ackermann function is a classic example of a recursive function, notable especially because it is not a primitive recursive function. It grows very quickly in value, as does the size of its call tree.
+A função de Ackermann é um exemplo clássico de uma função recursiva, especialmente porque não é uma função recursiva primitiva. Ela cresce muito rapidamente em valor, assim como no tamanho da sua árvore de chamadas.
 
 A função de Ackermann é geralmente definida da seguinte forma:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/align-columns.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/align-columns.md
index a177b736211..e4e82ddc3d0 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/align-columns.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/align-columns.md
@@ -8,7 +8,7 @@ dashedName: align-columns
 
 # --description--
 
-Given an array of many lines, where fields within a line are delineated by a single `$` character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
+Dado um array de muitas linhas, onde os campos dentro de uma linha são delineados por um único caractere `$`, escreva um programa que alinha cada coluna de campos, garantindo que as palavras em cada coluna estejam separadas por pelo menos um espaço. Além disso, permita que cada palavra em uma coluna seja deixada justificada à esquerda, justificada à direita ou justificada ao centro em sua coluna.
 
 # --instructions--
 
@@ -31,7 +31,7 @@ const testText = [
 
 **Observe que:**
 
-- The example input texts lines may, or may not, have trailing dollar characters.
+- As linhas de textos de entrada de exemplo podem, ou não, ter caracteres de dólar à frente.
 - Todas as colunas devem compartilhar o mesmo alinhamento.
 - Caracteres de espaço consecutivos adjacentes produzidos ao final das linhas são insignificantes para os propósitos da tarefa.
 - O texto de saída será visto em uma fonte monoespaçada em um editor de texto simples ou em um terminal básico. As linhas nele devem ser unidas usando o caractere de nova linha (`\n`).
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/amicable-pairs.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/amicable-pairs.md
index c2fbf2e6e3f..6bc80739b43 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/amicable-pairs.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/amicable-pairs.md
@@ -8,14 +8,14 @@ dashedName: amicable-pairs
 
 # --description--
 
-Two integers $N$ and $M$ are said to be amicable pairs if $N \\neq M$ and the sum of the proper divisors of $N$ ($\\mathrm{sum}(\\mathrm{propDivs}(N))$) $= M$ as well as $\\mathrm{sum}(\\mathrm{propDivs}(M)) = N$.
+Dizemos que dois números inteiros, $N$ e $M$, são pares amigáveis se $N \\neq M$ e a soma dos divisores apropriados de $N$ ($\\mathrm{sum}(\\mathrm{propDivs}(N))$) $= M$, assim como $\\mathrm{sum}(\\mathrm{propDivs}(M)) = N$.
 
 **Exemplo:**
 
 **1184** e **1210** são um par amigável, com divisores adequados:
 
 <ul>
-  <li>1, 2, 4, 8, 16, 32, 37, 74, 148, 296, 592 and</li>
+  <li>1, 2, 4, 8, 16, 32, 37, 74, 148, 296, 592 e</li>
   <li>1, 2, 5, 10, 11, 22, 55, 110, 121, 242, 605, respectivamente.</li>
 </ul>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/averages-mode.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/averages-mode.md
index bf7a85f0c32..a3c25e067ea 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/averages-mode.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/averages-mode.md
@@ -8,7 +8,7 @@ dashedName: averagesmode
 
 # --description--
 
-Write a function `mode` to find the value that appears most in an array.
+Escreva uma função `mode` para encontrar o valor que mais aparece em um array.
 
 O caso em que a coleção está vazia pode ser ignorado. É preciso ter cuidado para lidar com o caso em que a moda não é única.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/averages-pythagorean-means.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/averages-pythagorean-means.md
index 9239a2e5582..55bf981adfe 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/averages-pythagorean-means.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/averages-pythagorean-means.md
@@ -8,7 +8,7 @@ dashedName: averagespythagorean-means
 
 # --description--
 
-Compute all three of the <a href="https://en.wikipedia.org/wiki/Pythagorean_means" target="_blank" rel="noopener noreferrer nofollow">Pythagorean means</a> of the set of integers $1$ through $10$ (inclusive).
+Calcule todas as três do <a href="https://en.wikipedia.org/wiki/Pythagorean_means" target="_blank" rel="noopener noreferrer nofollow">médias pitagóricas</a> do conjunto de inteiros de $1$ a $10$ (inclusive).
 
 Exiba $A(x_1,\\ldots,x_n) \\geq G(x_1,\\ldots,x_n) \\geq H(x_1,\\ldots,x_n)$ para este conjunto de inteiros positivos.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/averages-root-mean-square.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/averages-root-mean-square.md
index 09193ae42b6..496cc9231d0 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/averages-root-mean-square.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/averages-root-mean-square.md
@@ -8,7 +8,7 @@ dashedName: averagesroot-mean-square
 
 # --description--
 
-Compute the Root Mean Square (RMS) of the numbers 1 through 10 inclusive.
+Calcule a raiz do valor quadrático médio (RMS) dos números de 1 a 10.
 
 A <abbr title="raiz do valor quadrático médio">RMS</abbr> é calculada pela raiz quadrada da média dos quadrados dos números, dada pela equação:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/babbage-problem.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/babbage-problem.md
index e417bcd8c74..a26819dad17 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/babbage-problem.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/babbage-problem.md
@@ -8,10 +8,10 @@ dashedName: babbage-problem
 
 # --description--
 
-Charles Babbage, looking ahead to the sorts of problems his Analytical Engine would be able to solve, gave this example:
+Charles Babbage, olhando com antecedência para o tipo de problemas que sua Máquina Analítica poderia resolver, deu este exemplo:
 
 <blockquote>
-  What is the smallest positive integer whose square ends in the digits 269,696?
+  Qual é o menor inteiro positivo cujo quadrado termina nos dígitos 269.696?
   <footer style='margin-left: 2em;'>Babbage, em carta ao Lord Bowden, 1837; veja Hollingdale e Tootill, <i>Electronic Computers</i>, segunda edição, 1970, p. 125.</footer>
 </blockquote>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/balanced-brackets.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/balanced-brackets.md
index 55915c8b1be..9d3e9f481fe 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/balanced-brackets.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/balanced-brackets.md
@@ -8,10 +8,10 @@ dashedName: balanced-brackets
 
 # --description--
 
-Determine whether a generated string of brackets is balanced; that is, whether it consists entirely of pairs of opening/closing brackets (in that order), none of which mis-nest.
+Determine se uma sequência de colchetes gerada é equilibrada, ou seja, se consiste inteiramente de pares de colchetes de abertura/fechamento (nessa ordem), nenhum dos quais colocado incorretamente.
 
 **Exemplos:**
-| Input                     | Saída |
+| Entrada                   | Saída |
 | ------------------------- | ----- |
 | <code>\[]</code> | true  |
 | <code>]\[</code> | false |
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/circles-of-given-radius-through-two-points.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/circles-of-given-radius-through-two-points.md
index 4845b27579f..b254d9c4ce2 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/circles-of-given-radius-through-two-points.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/circles-of-given-radius-through-two-points.md
@@ -8,15 +8,15 @@ dashedName: circles-of-given-radius-through-two-points
 
 # --description--
 
-Given two points on a plane and a radius, usually two circles of given radius can be drawn through the points.
+Dados dois pontos em um plano e num raio, geralmente dois círculos de um determinado raio podem ser traçados através dos pontos.
 
 **Exceções:**
 
 <ul>
-  <li>A radius of zero should be treated as never describing circles (except in the case where the points are coincident).</li>
-  <li>If the points are coincident then an infinite number of circles with the point on their circumference can be drawn, unless the radius is equal to zero as well which then collapses the circles to a point.</li>
-  <li>If the points form a diameter then return a single circle.</li>
-  <li>If the points are too far apart then no circles can be drawn.</li>
+  <li>Um raio de zero deve ser tratado como nunca descrevendo círculos (exceto no caso em que os pontos são coincidentes).</li>
+  <li>Se os pontos forem coincidentes, pode haver um número infinito de círculos em que o ponto de sua circunferência pode ser desenhado, a não ser que o raio seja igual a zero, o que fará com que os círculos não passem de um ponto.</li>
+  <li>Se os pontos formarem um diâmetro, então retorne um único círculo.</li>
+  <li>Se os pontos estiverem muito distantes, não será possível desenhar os círculos.</li>
 </ul>
 
 # --instructions--
@@ -26,7 +26,7 @@ Implementa uma função que recebe dois pontos e um raio e retorna os dois círc
 **Para casos extremos, retorne o seguinte:**
 
 <ul>
-  <li>If points are on the diameter, return one point. If the radius is also zero however, return <code>"Radius Zero"</code>.</li>
+  <li>Se os pontos estão no diâmetro, retorne um ponto. No entanto, se o raio também for zero, retorne <code>"Radius Zero"</code>.</li>
   <li>Se os pontos forem coincidentes, retorne <code>"Coincident point. Infinite solutions"</code>.</li>
   <li>Se os pontos estiverem mais distantes do que o diâmetro, retorne <code>"No intersection. Points further apart than circle diameter"</code>.</li>
 </ul>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/closest-pair-problem.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/closest-pair-problem.md
index c467b61853c..99768a506e2 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/closest-pair-problem.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/closest-pair-problem.md
@@ -8,11 +8,11 @@ dashedName: closest-pair-problem
 
 # --description--
 
-Provide a function to find the closest two points among a set of given points in two dimensions.
+Forneça uma função para encontrar os dois pontos mais próximos entre um conjunto de pontos dados em duas dimensões.
 
 A solução simples é um algoritmo $O(n^2)$ (que podemos chamar de *algoritmo de força bruta*). O pseudocódigo (usando índices) poderia ser, simplesmente:
 
-<pre><strong>bruteForceClosestPair</strong> of P(1), P(2), ... P(N)
+<pre><strong>bruteForceClosestPair</strong> de P(1), P(2), ... P(N)
 <strong>if</strong> N &#x3C; 2 <strong>then</strong>
   <strong>return</strong> ∞
 <strong>else</strong>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/combinations.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/combinations.md
index 5456ef25aa2..ff6c62b17e7 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/combinations.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/combinations.md
@@ -8,7 +8,7 @@ dashedName: combinations
 
 # --description--
 
-Given non-negative integers `m` and `n`, generate all size `m` combinations of the integers from `0` (zero) to `n-1` in sorted order (each combination is sorted and the entire table is sorted).
+Dado os números inteiros não negativos `m` e `n`, gere todas as combinações de tamanho `m` dos inteiros de `0` (zero) a `n-1` em ordem (cada combinação é ordenada, assim como a tabela inteira).
 
 **Exemplo:**
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/comma-quibbling.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/comma-quibbling.md
index 271004ce919..0234d03ea04 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/comma-quibbling.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/comma-quibbling.md
@@ -8,14 +8,14 @@ dashedName: comma-quibbling
 
 # --description--
 
-<a href="https://rosettacode.org/wiki/Comma_quibbling" target="_blank" rel="noopener noreferrer nofollow">Comma quibbling</a> is a task originally set by Eric Lippert in his blog.
+<a href="https://rosettacode.org/wiki/Comma_quibbling" target="_blank" rel="noopener noreferrer nofollow">Entre vírgulas</a> é uma tarefa originalmente criada por Eric Lippert em seu blog.
 
 # --instructions--
 
 Escreva uma função para gerar uma saída de string que é a concatenação das palavras de entrada a partir de uma lista/sequência, onde:
 
 <ol>
-  <li>An input of no words produces the output string of just the two brace characters (<code>"{}"</code>)</li>
+  <li>Uma entrada sem palavra produz como string de saída apenas dois caracteres de chaves (<code>"{}"</code>)</li>
   <li>Uma entrada de apenas uma palavra, por exemplo, <code>["ABC"]</code>, produz a string de saída com a palavra dentro de duas chaves. <code>"{ABC}"</code></li>
   <li>Uma entrada de duas palavras, por exemplo, <code>["ABC", "DEF"]</code>, produz uma string de saída com as duas palavras dentro de duas chaves com as palavras separadas pela string <code>" and "</code>, por exemplo, <code>"{ABC and DEF}"</code></li>
   <li>Uma entrada de três ou mais palavras, por exemplo <code>["ABC", "DEF", "G", "H"]</code>, produz a string de saída de todas elas separadas por <code>", "</code>, exceto a última palavra, que é separada por <code>" and "</code>, com todas elas dentro de duas chaves, por exemplo, <code>"{ABC, DEF, G and H}"</code></li>
@@ -24,7 +24,7 @@ Escreva uma função para gerar uma saída de string que é a concatenação das
 Teste sua função com a série de entradas a seguir mostrando a saída aqui nesta página:
 
 <ul>
-  <li>[] # (No input words).</li>
+  <li>[] # (Sem palavras de entrada).</li>
   <li>["ABC"]</li>
   <li>["ABC", "DEF"]</li>
   <li>["ABC", "DEF", "G", "H"]</li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/compare-a-list-of-strings.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/compare-a-list-of-strings.md
index 81904d1adff..ad1f388f5eb 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/compare-a-list-of-strings.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/compare-a-list-of-strings.md
@@ -8,7 +8,7 @@ dashedName: compare-a-list-of-strings
 
 # --description--
 
-A list is an ordered set of values that may contain duplicates. Aqui está um exemplo:
+Uma lista é um conjunto ordenado de valores que pode conter duplicatas. Aqui está um exemplo:
 
 ```js
 const list = [['AA',  'BB', 'CC'], ['AA', 'ACB', 'AA'], [], ['AA']];
@@ -29,67 +29,67 @@ Given a list of arbitrarily many strings, implement a function for each of the f
 assert(typeof allEqual === 'function');
 ```
 
-`azSorted` should be a function.
+`azSorted` deve ser uma função.
 
 ```js
 assert(typeof azSorted === 'function');
 ```
 
-`allEqual(["AA", "AA", "AA", "AA"])` should return true.
+`allEqual(["AA", "AA", "AA", "AA"])` deve retornar true.
 
 ```js
 assert(allEqual(testCases[0]));
 ```
 
-`azSorted(["AA", "AA", "AA", "AA"])` should return false.
+`azSorted(["AA", "AA", "AA", "AA"])` deve retornar false.
 
 ```js
 assert(!azSorted(testCases[0]));
 ```
 
-`allEqual(["AA", "ACB", "BB", "CC"])` should return false.
+`allEqual(["AA", "ACB", "BB", "CC"])` deve retornar false.
 
 ```js
 assert(!allEqual(testCases[1]));
 ```
 
-`azSorted(["AA", "ACB", "BB", "CC"])` should return true.
+`azSorted(["AA", "ACB", "BB", "CC"])` deve retornar true.
 
 ```js
 assert(azSorted(testCases[1]));
 ```
 
-`allEqual([])` should return true.
+`allEqual([])` deve retornar true.
 
 ```js
 assert(allEqual(testCases[2]));
 ```
 
-`azSorted([])` should return true.
+`azSorted([])` deve retornar true.
 
 ```js
 assert(azSorted(testCases[2]));
 ```
 
-`allEqual(["AA"])` should return true.
+`allEqual(["AA"])` deve retornar true.
 
 ```js
 assert(allEqual(testCases[3]));
 ```
 
-`azSorted(["AA"])` should return true.
+`azSorted(["AA"])` deve retornar true.
 
 ```js
 assert(azSorted(testCases[3]));
 ```
 
-`allEqual(["BB", "AA"])` should return false.
+`allEqual(["BB", "AA"])` deve retornar false.
 
 ```js
 assert(!allEqual(testCases[4]));
 ```
 
-`azSorted(["BB", "AA"])` should return false.
+`azSorted(["BB", "AA"])` deve retornar false.
 
 ```js
 assert(!azSorted(testCases[4]));
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md
index 8658fa4ba9e..4c49864468f 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md
@@ -1,6 +1,6 @@
 ---
 id: 596fd036dc1ab896c5db98b1
-title: Convert seconds to compound duration
+title: Converter segundos para duração composta
 challengeType: 1
 forumTopicId: 302236
 dashedName: convert-seconds-to-compound-duration
@@ -8,10 +8,10 @@ dashedName: convert-seconds-to-compound-duration
 
 # --description--
 
-Implement a function which:
+Implementar uma função que:
 
 <ul>
-  <li>takes a positive integer representing a duration in seconds as input (e.g., <code>100</code>), and</li>
+  <li>receba um inteiro positivo que represente uma duração em segundos como entrada (por exemplo, <code>100</code>) e</li>
   <li>retorna uma string que mostra a mesma duração decomposta em semanas, dias, horas, minutos e segundos detalhados abaixo (por exemplo, <code>1 min, 40 sec</code>).</li>
 </ul>
 
@@ -19,16 +19,16 @@ Demonstre que a função passa pelos três casos de teste:
 
 <div style='font-size:115%; font-weight: bold;'>Casos de teste</div>
 
-| Input number | Número de saída           |
-| ------------ | ------------------------- |
-| 7259         | <code>2 hr, 59 sec</code> |
-| 86400        | <code>1 d</code> |
-| 6000000      | <code>9 wk, 6 d, 10 hr, 40 min</code> |
+| Número de entrada | Número de saída           |
+| ----------------- | ------------------------- |
+| 7259              | <code>2 hr, 59 sec</code> |
+| 86400             | <code>1 d</code> |
+| 6000000           | <code>9 wk, 6 d, 10 hr, 40 min</code> |
 
 <div style="font-size:115%; font-weight: bold;">Detalhes</div>
 <ul>
   <li>
-    The following five units should be used:
+    As cinco unidades abaixo devem ser usadas:
 
 | Unit   | Suffix used in Output | Conversion            |
 | ------ | --------------------- | --------------------- |
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/count-occurrences-of-a-substring.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/count-occurrences-of-a-substring.md
index c0797d7a2d7..4248a2d879a 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/count-occurrences-of-a-substring.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/count-occurrences-of-a-substring.md
@@ -8,12 +8,12 @@ dashedName: count-occurrences-of-a-substring
 
 # --description--
 
-Create a function, or show a built-in function, to count the number of non-overlapping occurrences of a substring inside a string.
+Crie uma função, ou mostre uma função integrada para contar o número de ocorrências não sobrepostas de uma substring dentro de uma string.
 
 A função deve receber dois argumentos:
 
 <ul>
-  <li>the first argument being the string to search, and</li>
+  <li>o primeiro argumento deve ser a string onde ocorrerá a busca, e</li>
   <li>o segundo deve ser uma substring a ser buscada.</li>
 </ul>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/count-the-coins.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/count-the-coins.md
index 0aca40ec2fd..6ca869a6c4a 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/count-the-coins.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/count-the-coins.md
@@ -8,19 +8,19 @@ dashedName: count-the-coins
 
 # --description--
 
-There are four types of common coins in US currency:
+Existem quatro tipos de moedas comuns nos EUA:
 
 <ul>
-  <li>quarters (25 cents)</li>
-  <li>dimes (10 cents)</li>
-  <li>nickels (5 cents), and</li>
-  <li>pennies (1 cent)</li>
+  <li>quarters (25 centavos)</li>
+  <li>dimes (10 centavos)</li>
+  <li>nickels (5 centavos) e</li>
+  <li>pennies (1 centavo)</li>
 </ul>
 
 <p>Há seis maneiras de fazer troco com 15 centavos:</p>
 
 <ul>
-  <li>A dime and a nickel</li>
+  <li>Um dime e um nickel</li>
   <li>Um dime e 5 pennies</li>
   <li>3 nickels</li>
   <li>2 nickels e 5 pennies</li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cramers-rule.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cramers-rule.md
index df3a2ccc619..dfca94f86ac 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cramers-rule.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cramers-rule.md
@@ -8,7 +8,7 @@ dashedName: cramers-rule
 
 # --description--
 
-<a href="https://rosettacode.org/wiki/Cramer%27s_rule" target="_blank" rel="noopener noreferrer nofollow">Cramer's rule</a> is a formula for solving a system of linear equations by using the determinants of matrices formed from subsets of the coefficients and right hand side values.
+<a href="https://rosettacode.org/wiki/Cramer%27s_rule" target="_blank" rel="noopener noreferrer nofollow">A regra de Cramer</a> é uma fórmula para resolver um sistema de equações lineares usando os determinantes das matrizes formadas a partir de subconjuntos dos valores dos coeficientes e dos valores do lado direito.
 
 O determinante de uma matriz com 2 linhas e duas colunas é dado por:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cumulative-standard-deviation.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cumulative-standard-deviation.md
index 47540e50d4b..612765265ad 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cumulative-standard-deviation.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cumulative-standard-deviation.md
@@ -8,7 +8,7 @@ dashedName: cumulative-standard-deviation
 
 # --description--
 
-Suppose that the entire population of interest is eight students in a particular class. For a finite set of numbers, the population standard deviation is found by taking the square root of the average of the squared deviations of the values subtracted from their average value. The marks of a class of eight students (that is, a statistical population) are the following eight values:
+Suponha que a população de interesse sejam oito alunos em uma determinada sala de aula. Para um conjunto finito de números, o desvio-padrão da população é encontrado pegando a raiz quadrada da média dos desvios padrão ao quadrado dos valores subtraídos de seu valor médio. As notas de uma turma de oito alunos (ou seja, de uma população estatística) são os oito valores seguintes:
 
 $2, 4, 4, 4, 5, 5, 7, 9$
 
@@ -18,12 +18,12 @@ $$\mu ={\frac {2+4+4+4+5+5+7+9}{8}}={\frac {40}{8}}=5$$
 
 Primeiro, calcule os desvios de cada ponto de dados da média e calcule o quadrado do resultado de cada uma:
 
-| Deviations of each data | Quadrado do resultado |
-| ----------------------- | --------------------- |
-| $(2-5)^{2}=(-3)^{2}=9$  | $(5-5)^{2}=0^{2}=0$   |
-| $(4-5)^{2}=(-1)^{2}=1$  | $(5-5)^{2}=0^{2}=0$   |
-| $(4-5)^{2}=(-1)^{2}=1$  | $(7-5)^{2}=2^{2}=4$   |
-| $(4-5)^{2}=(-1)^{2}=1$  | $(9-5)^{2}=4^{2}=16$  |
+| Desvios de cada ponto  | Quadrado do resultado |
+| ---------------------- | --------------------- |
+| $(2-5)^{2}=(-3)^{2}=9$ | $(5-5)^{2}=0^{2}=0$   |
+| $(4-5)^{2}=(-1)^{2}=1$ | $(5-5)^{2}=0^{2}=0$   |
+| $(4-5)^{2}=(-1)^{2}=1$ | $(7-5)^{2}=2^{2}=4$   |
+| $(4-5)^{2}=(-1)^{2}=1$ | $(9-5)^{2}=4^{2}=16$  |
 
 A variância é a média desses valores:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cusip.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cusip.md
index f8430b9c5b3..d3365ddea4b 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cusip.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cusip.md
@@ -8,7 +8,7 @@ dashedName: cusip
 
 # --description--
 
-A **CUSIP** is a nine-character alphanumeric code that identifies a North American financial security for the purposes of facilitating clearing and settlement of trades. The CUSIP was adopted as an American National Standard under Accredited Standards X9.6.
+O **CUSIP** é um código alfanumérico de nove caracteres que identifica uma segurança financeira norte-americana visando facilitar a compensação e liquidação de negociações. O CUSIP foi adotado como um Padrão Nacional Americano segundo as Accredited Standards X9.6.
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cut-a-rectangle.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cut-a-rectangle.md
index 39080066442..61e9a07d7d7 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cut-a-rectangle.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/cut-a-rectangle.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7e06
-title: Cut a rectangle
+title: Cortar um retângulo
 challengeType: 1
 forumTopicId: 302242
 dashedName: cut-a-rectangle
@@ -8,7 +8,7 @@ dashedName: cut-a-rectangle
 
 # --description--
 
-A given rectangle is made from *m* × *n* squares. If *m* and *n* are not both odd, then it is possible to cut a path through the rectangle along the square edges such that the rectangle splits into two connected pieces with the same shape (after rotating one of the pieces by 180°). All such paths for 2 × 2 and 4 × 3 rectangles are shown below.
+Um retângulo dado é feito de *m* × *n* quadrados. Se *m* e *n* não são forem ímpares, então é possível cortar um caminho através do retângulo ao longo das bordas quadradas, de modo que o retângulo se divida em duas partes conectadas com a mesma forma (depois de girar uma das partes em 180°). Todos os caminhos para retângulos 2 × 2 e 4 × 3 são mostrados abaixo.
 
 <div style="width: 100%; text-align: center;">
   <svg xmlns="https://www.w3.org/2000/svg" xmlns:xlink="https://www.w3.org/1999/xlink" width="520" height="170" aria-hidden="true" alt="Diagram showing the possible paths for 2 by 2 and 4 by 3 rectangles">
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/date-format.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/date-format.md
index f3a767e5393..301d1e9fef7 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/date-format.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/date-format.md
@@ -8,9 +8,9 @@ dashedName: date-format
 
 # --description--
 
-Return an array with two date strings of the current date with the following specifications:
+Retorna um array com duas strings de data com a data atual de acordo com as seguintes especificações:
 
-- The first string's date order should be the year number, month number, and day number separated by dashes (`-`).
+- A ordem de data da primeira string deve ser o número do ano, o número do mês e o número do dia separados por traços (`-`).
 - O ano da primeira string deve ter quatro dígitos de tamanho.
 - O mês e o dia da primeira string não devem conter zeros precedentes.
 - Os nomes dos dias e dos meses na segunda string não devem ser abreviados.
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/date-manipulation.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/date-manipulation.md
index 1dd74c6f474..daffb2c65cd 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/date-manipulation.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/date-manipulation.md
@@ -8,7 +8,7 @@ dashedName: date-manipulation
 
 # --description--
 
-Given a date string in EST, output the given date as a string with 12 hours added to the time. Time zone should be preserved.
+Dada uma string de data no fuso horário EST, retorne a data informada como uma string com 12 horas adicionadas à hora. O fuso horário deve ser preservado.
 
 Exemplo de entrada: `"March 6 2009 7:30pm EST"`
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/day-of-the-week.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/day-of-the-week.md
index b8ee2895699..81f359c490e 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/day-of-the-week.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/day-of-the-week.md
@@ -8,7 +8,7 @@ dashedName: day-of-the-week
 
 # --description--
 
-A company decides that whenever Xmas falls on a Sunday they will give their workers all extra paid holidays so that, together with any public holidays, workers will not have to work the following week (between the 25th of December and the first of January).
+Uma empresa decide que, sempre que o Natal cai num domingo, dará aos seus trabalhadores todas as férias remuneradas extra, para que, juntamente com quaisquer feriados públicos, os trabalhadores não tenham de trabalhar na semana seguinte (entre 25 de dezembro e 1 de janeiro).
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
index 2cd9ce03778..78bebc897c1 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
@@ -8,7 +8,7 @@ dashedName: deal-cards-for-freecell
 
 # --description--
 
-*FreeCell* is the solitaire card game that Paul Alfille introduced to the PLATO system in 1978. Jim Horne, at Microsoft, changed the name to FreeCell and reimplemented the game for DOS, then Windows. This version introduced 32000 numbered deals.
+O *FreeCell* é o jogo de cartas de paciência que Paul Alfille introduziu no sistema PLATO, em 1978. Jim Horne, da Microsoft, mudou o nome para FreeCell e implementou novamente o jogo no DOS e depois no Windows. A versão do Windows apresentava 32 mil distribuições numeradas.
 
 À medida que o jogo se tornou popular, Jim Horne revelou o algoritmo, e outras implementações do FreeCell começaram a reproduzir as distribuições de cartas da versão da Microsoft. Estas distribuições eram numeradas de 1 a 32000. As versões mais recentes da Microsoft têm 1 milhão de distribuições, numeradas de 1 a 1000000. Algumas implementações permitem números fora desse intervalo.
 
@@ -23,12 +23,12 @@ O algoritmo usa o gerador de congruência linear do C da Microsoft:
 Segue o algoritmo:
 
 <ol>
-  <li>Seed the RNG with the number of the deal.
+  <li>Faça o seed do RNG (intervalo) com o número da distribuição.
   </li><li>Crie um array de 52 cartas: Ás de Paus, Ás de Ouro, Ás de Copas, Ás de Espadas, 2 de Paus, 2 de Ouro, e assim por diante: Ás, 2, 3, 4, 5, 6, 7, 8, 9, 10, Valete, Rainha, Rei. Os índices do array vão de 0 a 51, estando o Ás de Paus no índice 0 e o Rei de Espadas no índice 51.</li>
   <li>Até que o array esteja vazio:</li>
-  <li>Escolha uma carta aleatória no índice ≡ próximo número aleatório (tamanho do array mod).</li>
     <ul>
-      <li>Swap this random card with the last card of the array.</li>
+      <li>Escolha uma carta aleatória no <i>index</i> ≡ <i>next random number</i> (mod <i>array length</i>).</li>
+      <li>Troque esta carta aleatória pela última carta do array.</li>
       <li>Remova esta carta aleatória do array. (O comprimento do array diminui em 1.)</li>
       <li>Distribua esta carta aleatória.</li>
     </ul>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/deepcopy.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/deepcopy.md
index 5ef3d54861e..e97513ebe06 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/deepcopy.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/deepcopy.md
@@ -8,12 +8,12 @@ dashedName: deepcopy
 
 # --description--
 
-Write a function that returns a deep copy of a given object. The copy must not be the same object that was given.
+Escreva uma função que retorne uma cópia profunda de um objeto dado. A cópia não deve ser o mesmo objeto que foi dado.
 
 Esta tarefa não testará:
 
 <ul>
-  <li>Objects with properties that are functions</li>
+  <li>Objetos com propriedades que são funções</li>
   <li>Objetos de data ou objetos com propriedades que são objetos de data</li>
   <li>RegEx ou objetos com propriedades que são objetos RegEx</li>
   <li>Cópias de protótipos</li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/define-a-primitive-data-type.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/define-a-primitive-data-type.md
index f7346290c46..8e5a033acdf 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/define-a-primitive-data-type.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/define-a-primitive-data-type.md
@@ -8,12 +8,12 @@ dashedName: define-a-primitive-data-type
 
 # --description--
 
-Define a type that behaves like an integer but has a lowest valid value of 1 and a highest valid value of 10.
+Defina um tipo que se comporte como um número inteiro, mas que tenha seu valor menor válido de 1 e seu maior valor válido de 10.
 
 Tratamento de erro:
 
 <ul>
-  <li>If you try to instantiate a <code>Num</code> with a value outside of 1 - 10, it should throw a <code>TypeError</code> with an error message of <code>'Out of range'</code>.</li>
+  <li>Se você tentar instanciar um <code>Num</code> com um valor fora do intervalo de 1 - 10, deve lançar um <code>TypeError</code> com uma mensagem de erro de <code>'Out of range'</code>.</li>
   <li>Se você tentar instanciar um <code>Num</code> com um valor que não seja um número, deve lançar um <code>TypeError</code> com uma mensagem de erro de <code>'Not a Number'</code>.</li>
 </ul>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/department-numbers.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/department-numbers.md
index ca1a1f2b68d..99239f97805 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/department-numbers.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/department-numbers.md
@@ -8,10 +8,10 @@ dashedName: department-numbers
 
 # --description--
 
-There is a highly organized city that has decided to assign a number to each of their departments:
+Existe uma cidade altamente organizada que decidiu atribuir um número a cada um de seus departamentos:
 
 <ul>
-  <li>Police department</li>
+  <li>Departamento de polícia</li>
   <li>Departamento de limpeza sanitária</li>
   <li>Departamento dos bombeiros</li>
 </ul>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/discordian-date.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/discordian-date.md
index 49dd6a56c57..8ba11ce5e44 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/discordian-date.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/discordian-date.md
@@ -7,7 +7,7 @@ dashedName: discordian-date
 ---
 
 # --description--
-The Gregorian calendar is a solar calendar with 12 months of 28-31 days each. A week consists of seven days, and there are 52 weeks and 1 day per year. The year consists of 365 days with a leap day added to February every leap year. A leap year occurs every four years, except for the first three centurial years of every 400 years.
+O calendário gregoriano é um calendário solar com 12 meses de 28-31 dias cada. Uma semana consiste em sete dias e com 52 semanas e 1 dia por ano. O ano consiste em 365 dias, com um dia a mais adicionado a fevereiro nos anos bissextos. Um ano bissexto ocorre a cada quatro anos, exceto para os primeiros três anos de virada de século de cada 400 anos.
 
 O <a href="http://www.rosettacode.org/wiki/Discordian_date" target="_blank" rel="noopener noreferrer nofollow">calendário discordiano</a> está alinhado ao calendário gregoriano e começa em 1º de janeiro. A semana consiste em cinco dias e com 73 semanas por ano. O ano também consiste em 365 dias, com um dia extra inserido entre o caos 59 e o caos 60 todo ano bissexto.
 
@@ -53,7 +53,7 @@ assert(
 );
 ```
 
-`discordianDate(new Date(2012, 1, 29))` should return `"Setting Orange, the 60th day of Chaos in the YOLD 3178. Celebrate St. Tib\'s Day!"`.
+`discordianDate(new Date(2012, 1, 29))` deve retornar `"Setting Orange, the 60th day of Chaos in the YOLD 3178. Celebrate St. Tib\'s Day!"`.
 
 ```js
 assert(
@@ -71,7 +71,7 @@ assert(
 );
 ```
 
-`discordianDate(new Date(2010, 0, 5))` should return `"Setting Orange, the 5th day of Chaos in the YOLD 3176. Celebrate Mungday!"`.
+`discordianDate(new Date(2010, 0, 5))` deve retornar `"Setting Orange, the 5th day of Chaos in the YOLD 3176. Celebrate Mungday!"`.
 
 ```js
 assert(
@@ -80,7 +80,7 @@ assert(
 );
 ```
 
-`discordianDate(new Date(2011, 4, 3))` should return `"Pungenday, the 50th day of Discord in the YOLD 3177. Celebrate Discoflux!"`.
+`discordianDate(new Date(2011, 4, 3))` deve retornar `"Pungenday, the 50th day of Discord in the YOLD 3177. Celebrate Discoflux!"`.
 
 ```js
 assert(
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/dot-product.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/dot-product.md
index be64567c744..287e021f2c1 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/dot-product.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/dot-product.md
@@ -8,7 +8,7 @@ dashedName: dot-product
 
 # --description--
 
-Create a function, to compute the **dot product**, also known as the **scalar product** of two vectors.
+Crie uma função, para calcular o **produto escalar**, também conhecido como **produto interno** entre dois vetores.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/element-wise-operations.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/element-wise-operations.md
index b1dbfc0206f..21043421d88 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/element-wise-operations.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/element-wise-operations.md
@@ -8,12 +8,12 @@ dashedName: element-wise-operations
 
 # --description--
 
-Implement basic element-wise matrix-matrix and scalar-matrix operations.
+Implemente operações básicas matriz-matriz e escalar-matriz de elementos.
 
 **Implemente:**
 
 <ul>
-  <li>addition</li>
+  <li>adição</li>
   <li>subtração</li>
   <li>multiplicação</li>
   <li>divisão</li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/emirp-primes.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/emirp-primes.md
index 34dea89f385..615cb40b850 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/emirp-primes.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/emirp-primes.md
@@ -8,14 +8,14 @@ dashedName: emirp-primes
 
 # --description--
 
-An emirp (**prime** spelled backwards) are primes that when reversed (in their decimal representation) are a different prime.
+Um omirp (**primo** escrito ao contrário) é um número primo que, quando invertido (em sua representação decimal) é um número primo diferente.
 
 # --instructions--
 
 Escreva uma função que:
 
 <ul>
-  <li>Shows the first <code>n</code> emirp numbers.</li>
+  <li>Mostra os <code>n</code> primeiros números omirp.</li>
   <li>Mostra os números omirp em um intervalo.</li>
   <li>Mostra o número de omirps em um intervalo.</li>
   <li>Mostre o <code>n<sup>th</sup></code> (enésimo) número omirp.</li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/entropy.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/entropy.md
index 5f35b87c824..673bd86ee63 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/entropy.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/entropy.md
@@ -8,7 +8,7 @@ dashedName: entropy
 
 # --description--
 
-Calculate the Shannon entropy H of a given input string.
+Calcule a entropia H de Shannon de uma string fornecida como entrada.
 
 Dada a variável aleatória discreta $X$, que é uma string de "símbolos" $N$ (total de caracteres) que consiste em $n$ caracteres diferentes (n=2 para binário), a entropia de Shannon de X em bits/símbolo é:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/equilibrium-index.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/equilibrium-index.md
index 621252bdde1..55b5e79cbcb 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/equilibrium-index.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/equilibrium-index.md
@@ -8,7 +8,7 @@ dashedName: equilibrium-index
 
 # --description--
 
-An equilibrium index of a sequence is an index into the sequence such that the sum of elements at lower indices is equal to the sum of elements at higher indices.
+Um índice de equilíbrio de uma sequência é um índice na sequência, tal que a soma dos elementos nos índices mais baixos é igual à soma dos elementos nos índices mais altos.
 
 Por exemplo, em uma sequência $A$:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/ethiopian-multiplication.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/ethiopian-multiplication.md
index 54fcea07c9c..cff3a88cf1c 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/ethiopian-multiplication.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/ethiopian-multiplication.md
@@ -8,16 +8,16 @@ dashedName: ethiopian-multiplication
 
 # --description--
 
-Ethiopian multiplication is a method of multiplying integers using only addition, doubling, and halving.
+A multiplicação etíope é um método de multiplicação de inteiros usando apenas adição, duplicação e divisão pela metade.
 
 **Método:**
 
 <ol>
-  <li>Take two numbers to be multiplied and write them down at the top of two columns</li>
-  <li>In the left-hand column repeatedly halve the last number, discarding any remainders, and write the result below the last in the same column, until you write a value of <code>1</code></li>
-  <li>In the right-hand column repeatedly double the last number and write the result below. stop when you add a result in the same row as where the left hand column shows <code>1</code></li>
-  <li>Examine the table produced and discard any row where the value in the left column is even</li>
-  <li>Sum the values in the right-hand column that remain to produce the result of multiplying the original two numbers together</li>
+  <li>Pegue dois números para serem multiplicados e anote-os no topo de duas colunas</li>
+  <li>Na coluna da esquerda, reduza repetidamente pela metade o último número, descartando quaisquer restos, e escreva o resultado abaixo do último na mesma coluna, até você escrever o valor de <code>1</code></li>
+  <li>Na coluna da direita, duplique repetidamente o último número e escreva o resultado abaixo. Pare quando adicionar um resultado na mesma linha onde a coluna da esquerda mostre <code>1</code></li>
+  <li>Examinar a tabela produzida e descarte qualquer linha onde o valor na coluna da esquerda seja par</li>
+  <li>Soma os valores na coluna da direita que permanecem para produzir o resultado da multiplicação dos dois números originais juntos</li>
 </ol>
 
 **Por exemplo:** `17 × 34`
@@ -74,7 +74,7 @@ Temos, então, que `17` multiplicado por `34`, pelo método etíope, é `578`.
 A tarefa é definir três funções/métodos/procedimentos/sub-rotinas nomeadas:
 
 <ol>
-  <li>one to halve an integer,</li>
+  <li>um para dividir pela metade um número inteiro,</li>
   <li>um para dobrar um número inteiro, e</li>
   <li>uma para declarar se um inteiro é par</li>
 </ol>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/euler-method.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/euler-method.md
index 6d0fe5f980f..3da7cfdbe4a 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/euler-method.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/euler-method.md
@@ -8,7 +8,7 @@ dashedName: euler-method
 
 # --description--
 
-Euler's method numerically approximates solutions of first-order ordinary differential equations (ODEs) with a given initial value. It is an explicit method for solving initial value problems (IVPs), as described in <a href="https://www.freecodecamp.org/news/eulers-method-explained-with-examples/" title="Euler's Method Explained with Examples" target="_blank" rel="noopener noreferrer nofollow">this article</a>.
+O método de Euler aproxima numericamente as soluções de equações diferenciais normais de primeira ordem (ODEs) com um dado valor inicial. It is an explicit method for solving initial value problems (IVPs), as described in <a href="https://www.freecodecamp.org/news/eulers-method-explained-with-examples/" title="Euler's Method Explained with Examples" target="_blank" rel="noopener noreferrer nofollow">this article</a>.
 
 O ODE deve ser fornecido da seguinte forma:
 
@@ -85,7 +85,7 @@ e compare com a solução analítica.
 **Valores iniciais:**
 
 <ul>
-  <li>initial temperature <big>$T_0$</big> shall be <code>100 °C</code></li>
+  <li>a temperatura inicial <big>$T_0$</big> deve ser <code>100 °C</code></li>
   <li>a temperatura ambiente <big>$T_R$</big> deve ser <code>20 °C</code></li>
   <li>a constante de resfriamento <big>$k$</big> será <code>0.07</code></li>
   <li>o intervalo de tempo para calcular deve ser de <code>0 s</code> a <code>100 s</code></li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/evaluate-binomial-coefficients.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/evaluate-binomial-coefficients.md
index 6b98e65f190..a092ab51e99 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/evaluate-binomial-coefficients.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/evaluate-binomial-coefficients.md
@@ -8,7 +8,7 @@ dashedName: evaluate-binomial-coefficients
 
 # --description--
 
-Write a function to calculate the binomial coefficient for the given value of n and k.
+Escreva uma função para calcular o coeficiente binomial para o valor dado de n e k.
 
 Esta fórmula é recomendada:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/execute-a-markov-algorithm.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/execute-a-markov-algorithm.md
index 9fb2c77e854..d4444af12db 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/execute-a-markov-algorithm.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/execute-a-markov-algorithm.md
@@ -8,11 +8,11 @@ dashedName: execute-a-markov-algorithm
 
 # --description--
 
-Markov Concepts are used in machine learning, because of its simple approach in data manipulation. With a set number of `rules` you can manipulate given `data` to create a desired `output`.
+Os conceitos de Markov são utilizados na aprendizagem de máquina, devido à abordagem simples na manipulação de dados. Com um número definido de regras (`rules`), você pode manipular dados (`data`) para criar uma saída (`output`) desejada.
 
 Adicionamos em segundo plano:
 
-The `rules` in the form of nested array, and the `data` in the form of array, too. E as saídas (`outputs`) desejadas.
+As regras (`rules`) no formato de array aninhado e os dados (`data`) também na forma de um array. E as saídas (`outputs`) desejadas.
 
 As regras (`rules`):
 
@@ -100,7 +100,7 @@ assert.deepEqual(markov(rules[1], datas[1]), outputs[1]);
 assert.deepEqual(markov(rules[2], datas[2]), outputs[2]);
 ```
 
-`markov(["_+1 -> _1+","1+1 -> 11+","1! -> !1",",! -> !+","_! -> _","1*1 -> x,@y","1x -> xX","X, -> 1,1","X1 -> 1X","_x -> _X",",x -> ,X","y1 -> 1y","y_ -> _","1@1 -> x,@y","1@_ -> @_",",@_ -> !_","++ -> +","_1 -> 1","1+_ -> 1","_+_ -> "],"_1111*11111_")` should return the string `11111111111111111111`.
+`markov(["_+1 -> _1+","1+1 -> 11+","1! -> !1",",! -> !+","_! -> _","1*1 -> x,@y","1x -> xX","X, -> 1,1","X1 -> 1X","_x -> _X",",x -> ,X","y1 -> 1y","y_ -> _","1@1 -> x,@y","1@_ -> @_",",@_ -> !_","++ -> +","_1 -> 1","1+_ -> 1","_+_ -> "],"_1111*11111_")` deve retornar a string `11111111111111111111`.
 
 ```js
 assert.deepEqual(markov(rules[3], datas[3]), outputs[3]);
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/execute-brain.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/execute-brain.md
index 78d458207d6..62a7d597284 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/execute-brain.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/execute-brain.md
@@ -1,6 +1,6 @@
 ---
 id: 59e0a8df964e4540d5abe599
-title: Executar Brain****
+title: Execute Brain****
 challengeType: 1
 forumTopicId: 302261
 dashedName: execute-brain
@@ -10,28 +10,28 @@ dashedName: execute-brain
 
 Write a function to implement a Brain\*\*\*\* interpreter. The function will take a string as a parameter and should return a string as the output. More details are given below:
 
-RCBF é um conjunto de interpretadores e compiladores <a href="https://rosettacode.org/wiki/Brainf***" target="_blank" rel="noopener noreferrer nofollow">Brainf\*\*\*</a> escritos pelo Rosetta Code em diversas linguagens.
+RCBF is a set of <a href="https://rosettacode.org/wiki/Brainf***" target="_blank" rel="noopener noreferrer nofollow">Brainf\*\*\*</a> compilers and interpreters written for Rosetta Code in a variety of languages.
 
-Abaixo, encontramos os links para cada uma das versões do RCBF.
+Below are links to each of the versions of RCBF.
 
-Uma implementação só precisa implementar corretamente as seguintes instruções:
+An implementation need only properly implement the following instructions:
 
-| Command                   | Descrição                                                                                      |
-| ------------------------- | ---------------------------------------------------------------------------------------------- |
-| <code>></code> | Move the pointer to the right                                                                  |
-| <code>&lt;</code> | Mova o ponteiro para a esquerda                                                                |
-| <code>+</code> | Incremente a célula de memória sob o ponteiro                                                  |
-| <code>-</code> | Decremente a célula de memória sob o ponteiro                                                  |
-| <code>.</code> | Produza o caractere representado pela célula no ponteiro                                       |
-| <code>,</code> | Insira um caractere e armazene-o na célula do ponteiro                                         |
-| <code>\[</code> | Salte para além da correspondência de <code>]</code> se a célula sob o ponteiro for 0 |
-| <code>]</code> | Volte à célula correspondente <code>\[</code> se a célula sob o ponteiro não for zero |
+| Command           | Description                                                                        |
+| ----------------- | ---------------------------------------------------------------------------------- |
+| <code>></code>    | Move the pointer to the right                                                      |
+| <code>&lt;</code> | Move the pointer to the left                                                       |
+| <code>+</code>    | Increment the memory cell under the pointer                                        |
+| <code>-</code>    | Decrement the memory cell under the pointer                                        |
+| <code>.</code>    | Output the character signified by the cell at the pointer                          |
+| <code>,</code>    | Input a character and store it in the cell at the pointer                          |
+| <code>\[</code>   | Jump past the matching <code>]</code> if the cell under the pointer is 0           |
+| <code>]</code>    | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
 
-Qualquer tamanho de célula é permitido, suporte a EOF (*E*nd-*O*f-*F*ile) é opcional, bem como ter memória limitada ou não limitada.
+Any cell size is allowed, EOF (*E*nd-*O*-*F*ile) support is optional, as is whether you have bounded or unbounded memory.
 
 # --hints--
 
-`brain(bye)` deve retornar uma string
+`brain(bye)` should return a string
 
 ```js
 assert(typeof brain(bye) === 'string');
@@ -43,19 +43,19 @@ assert(typeof brain(bye) === 'string');
 assert.equal(brain('++++++[>++++++++++<-]>+++++.'), 'A');
 ```
 
-`brain(bye)` deve retornar `Goodbye, World!\r\n`
+`brain(bye)` should return `Goodbye, World!\r\n`
 
 ```js
 assert.equal(brain(bye), 'Goodbye, World!\r\n');
 ```
 
-`brain(hello)` deve retornar `Hello World!\n`
+`brain(hello)` should return `Hello World!\n`
 
 ```js
 assert.equal(brain(hello), 'Hello World!\n');
 ```
 
-`brain(fib)` deve retornar `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89`
+`brain(fib)` should return `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89`
 
 ```js
 assert.equal(brain(fib), '1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89');
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/extensible-prime-generator.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/extensible-prime-generator.md
index 0fb5a98c521..d1b1097a943 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/extensible-prime-generator.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/extensible-prime-generator.md
@@ -8,12 +8,12 @@ dashedName: extensible-prime-generator
 
 # --description--
 
-Write a generator of prime numbers, in order, that will automatically adjust to accommodate the generation of any reasonably high prime.
+Escreva um gerador de números primos, em ordem, que se ajuste automaticamente para acomodar a geração de qualquer número primo razoavelmente alto.
 
 O gerador deve poder:
 
 <ul>
-  <li>Show the first <code>n</code> prime numbers</li>
+  <li>Mostrar os <code>n</code> primeiros números primos</li>
   <li>Mostrar os números primos em um intervalo</li>
   <li>Mostrar a quantidade de números primos em um intervalo</li>
   <li>Mostrar o <code>n<sup>th</sup></code> (enésimo) número primo</li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/factorial.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/factorial.md
index 33ae0cc325f..1af640911be 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/factorial.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/factorial.md
@@ -8,7 +8,7 @@ dashedName: factorial
 
 # --description--
 
-Write a function to return the factorial of a number.
+Escreva uma função que retorne o fatorial de um número.
 
 O fatorial de um número é dado por:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/factors-of-a-mersenne-number.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/factors-of-a-mersenne-number.md
index 8f9eb35f26d..3f259acdfe4 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/factors-of-a-mersenne-number.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/factors-of-a-mersenne-number.md
@@ -8,7 +8,7 @@ dashedName: factors-of-a-mersenne-number
 
 # --description--
 
-A Mersenne number is a number in the form of <code>2<sup>P</sup>-1</code>.
+Um número de Mersenne é um número na forma de <code>2<sup>P</sup>-1</code>.
 
 Se `P` for primo, o número de Mersenne pode ser primo de Mersenne. (Se `P` não for primo, o número de Mersenne também não será primo.)
 
@@ -28,8 +28,8 @@ Remova a parte superior do expoente e, se for 1, multiplique `square` pela base
 
 Use o resultado do módulo da última etapa como o valor inicial de `square` na próxima etapa:
 
-<pre>Remove   Optional
-square        top bit  multiply by 2  mod 47
+<pre>Remova   Opcional
+square        pte sup  multiplique 2  mod 47
 ------------  -------  -------------  ------
 1*1 = 1       1  0111  1*2 = 2           2
 2*2 = 4       0   111     no             4
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/factors-of-an-integer.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/factors-of-an-integer.md
index 59112656460..4a36cc0e7d8 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/factors-of-an-integer.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/factors-of-an-integer.md
@@ -8,7 +8,7 @@ dashedName: factors-of-an-integer
 
 # --description--
 
-Write a function that returns the factors of a positive integer as an array.
+Escreva uma função que retorne os fatores de um inteiro positivo como um array.
 
 Estes fatores são os inteiros positivos através dos quais o número que está sendo fatorado pode ser dividido para produzir um resultado inteiro e positivo.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/farey-sequence.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/farey-sequence.md
index e2b26a266fe..e788557c2bc 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/farey-sequence.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/farey-sequence.md
@@ -8,15 +8,15 @@ dashedName: farey-sequence
 
 # --description--
 
-The Farey sequence <code>F<sub>n</sub></code> of order `n` is the sequence of completely reduced fractions between `0` and `1` which, when in lowest terms, have denominators less than or equal to `n`, arranged in order of increasing size.
+A sequência de Farey <code>F<sub>n</sub></code> de ordem `n` é a sequência de frações completamente reduzida entre `0` e `1` que, quando em seus termos menores, tem denominadores menores que ou iguais a `n`, organizadas em ordem de tamanho crescente.
 
 A *sequência de Farey*, algumas vezes, é incorretamente chamada de *série de Farey*.
 
 Cada sequência de Farey:
 
 <ul>
-  <li>starts with the value  0,  denoted by the fraction  $ \frac{0}{1} $</li>
-  <li>ends with the value  1,  denoted by the fraction  $ \frac{1}{1}$.</li>
+  <li>começa com o valor 0,  denotado pela fração  $ \frac{0}{1} $</li>
+  <li>termina com o valor 1,  denotado pela fração $ \frac{1}{1}$.</li>
 </ul>
 
 As sequências de Farey de ordens `1` a `5` são:
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fibonacci-n-step-number-sequences.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fibonacci-n-step-number-sequences.md
index d21ed89fc79..1833aa2b403 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fibonacci-n-step-number-sequences.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fibonacci-n-step-number-sequences.md
@@ -8,10 +8,10 @@ dashedName: fibonacci-n-step-number-sequences
 
 # --description--
 
-These number series are an expansion of the ordinary Fibonacci sequence where:
+Estas séries numéricas são uma expansão da sequência comum de Fibonacci, onde:
 
 <ol>
-  <li>For $n = 2$ we have the Fibonacci sequence; with initial values $[1, 1]$ and $F_k^2 = F_{k-1}^2 + F_{k-2}^2$</li>
+  <li>Para $n = 2$, temos a sequência de Fibonacci, com os valores iniciais $[1, 1]$ e $F_k^2 = F_{k-1}^2 + F_{k-2}^2$</li>
   <li>Para $n = 3$, temos a sequência de tribonacci, com os valores iniciais $[1, 1, 2]$ e $F_k^3 = F_{k-1}^3 + F_{k-2}^3 + F_{k-3}^3$</li>
   <li>Para $n = 4$, temos a sequência de tetranacci, com os valores iniciais $[1, 1, 2, 4]$ e $F_k^4 = F_{k-1}^4 + F_{k-2}^4 + F_{k-3}^4 + F_{k-4}^4$...</li>
   <li>Para a $n>2$ mais geral, temos a sequência de Fibonacci de $n$ passos - $F_k^n$, com os valores iniciais dos primeiros $n$ valores da $(n-1)$-ésima sequência de Fibonacci da $n$-ésima etapa $F_k^{n-1}$, e o $k$-ésimo valor dessa $n$-ésima sequência sendo $F_k^n = \sum_{i=1}^{(n)} {F_{k-i}^{(n)}}$</li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fibonacci-sequence.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fibonacci-sequence.md
index 4981b68ecf3..24c5d4233ff 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fibonacci-sequence.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fibonacci-sequence.md
@@ -8,7 +8,7 @@ dashedName: fibonacci-sequence
 
 # --description--
 
-Write a function to generate the <code>n<sup>th</sup></code> Fibonacci number.
+Escreva uma função para gerar o <code>n<sup>th</sup></code> (enésimo) número de Fibonacci.
 
 O <code>n<sup>th</sup></code> (enésimo) número de Fibonacci é dado por:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fibonacci-word.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fibonacci-word.md
index 212447ae369..50bc637fd98 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fibonacci-word.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fibonacci-word.md
@@ -8,12 +8,12 @@ dashedName: fibonacci-word
 
 # --description--
 
-The Fibonacci Word Sequence may be created in a manner analogous to the Fibonacci Sequence, but it focuses on iterating concatenation.
+A sequência de palavra de Fibonacci pode ser criada de uma maneira análoga à sequência de Fibonacci, mas foca na iteração de concatenações.
 
-<pre>Define  F_Word<sub>1</sub>  as  <strong>1</strong>
-Define  F_Word<sub>2</sub>  as  <strong>0</strong>
-Form   F_Word<sub>3</sub>  as  F_Word<sub>2</sub>   concatenated with  F_Word<sub>1</sub>   i.e.:  <strong>01</strong>
-Form   F_Word<sub>n</sub>  as  F_Word<sub>n-1</sub>  concatenated with  F_word<sub>n-2</sub>
+<pre>Defina a F_Word<sub>1</sub>  como  <strong>1</strong>
+Defina a  F_Word<sub>2</sub>  como  <strong>0</strong>
+Forme a F_Word<sub>3</sub>  como  F_Word<sub>2</sub>   concatenada com a  F_Word <sub>1</sub>, ou seja:  <strong>01</strong>
+Forme a F_Word<sub>n</sub>  como  F_Word<sub>n-1</sub>  concatenada com a  F_word <sub>n-2</sub>
 </pre>
 
 É necessário o cálculo de entropia neste desafio, <a href="https://www.freecodecamp.org/learn/coding-interview-prep/rosetta-code/entropy" target="_blank" rel="noopener noreferrer nofollow">como mostrado neste desafio do Rosetta Code</a>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fizzbuzz.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fizzbuzz.md
index 0b80758513e..aeb91da33c4 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fizzbuzz.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fizzbuzz.md
@@ -8,10 +8,10 @@ dashedName: fizzbuzz
 
 # --description--
 
-Write a program that generates an array of integers from 1 to 100 (inclusive). But:
+Escreva um programa que gere um array de números inteiros de 1 a 100 (inclusive). Mas:
 
 <ul>
-    <li>for multiples of 3, add <code>"Fizz"</code> to the array instead of the number</li>
+    <li>para múltiplos de 3, adicione <code>"Fizz"</code> no array no lugar do número</li>
     <li>para múltiplos de 5, adicione <code>"Buzz"</code> no array no lugar do número</li>
     <li>para múltiplos de 3 e 5, adicione <code>"FizzBuzz"</code> no array no lugar do número</li>
 </ul>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fractran.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fractran.md
index cd56209f832..c926b3dcb89 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fractran.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/fractran.md
@@ -8,14 +8,14 @@ dashedName: fractran
 
 # --description--
 
-FRACTRAN is a Turing-complete esoteric programming language invented by the mathematician John Horton Conway.
+FRACTRAN é uma linguagem de programação esotérica, completa para testes Turing, inventada pelo matemático John Horton Conway.
 
 Um programa em FRACTRAN é uma lista ordenada de frações positivas $P = (f_1, f_2, \\ldots, f_m)$, juntamente com uma primeira entrada positiva inteira $n$.
 
 O programa é executado atualizando o inteiro $n$ da seguinte forma:
 
 <ul>
-  <li>for the first fraction, $f_i$, in the list for which $nf_i$ is an integer, replace $n$ with $nf_i$ ;</li>
+  <li>para a primeira fração, $f_i$, na lista para a qual $nf_i$ é um número inteiro, substitua $n$ por $nf_i$;</li>
   <li>repita essa regra até que nenhuma fração na lista produza um inteiro quando multiplicado por $n$, e então pare.</li>
 </ul>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/gamma-function.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/gamma-function.md
index adc2ec31a7b..e5f07b72f0e 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/gamma-function.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/gamma-function.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7e76
-title: Gamma function
+title: Função gama
 challengeType: 1
 forumTopicId: 302271
 dashedName: gamma-function
@@ -8,7 +8,7 @@ dashedName: gamma-function
 
 # --description--
 
-Implement one algorithm (or more) to compute the Gamma function (in the real field only).
+Implemente um algoritmo (ou mais) para calcular a função Gama (somente no campo dos reais).
 
 A função Gama pode ser definida como:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/gaussian-elimination.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/gaussian-elimination.md
index d277d26ad4c..7c8ccb384e6 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/gaussian-elimination.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/gaussian-elimination.md
@@ -8,7 +8,7 @@ dashedName: gaussian-elimination
 
 # --description--
 
-Write a function to solve \\(Ax = b\\) using Gaussian elimination then backwards substitution.
+Escreva uma função para calcular \\(Ax = b\\) usando a eliminação gaussiana e, em seguida, a substituição reversa.
 
 \\(A\\) sendo uma matriz \\(n \\times n\\). Além disso, \\(x\\) e \\(b\\) são vetores \\(n\\) por 1.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/general-fizzbuzz.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/general-fizzbuzz.md
index 8ff29fd7c1f..35fe74d5100 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/general-fizzbuzz.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/general-fizzbuzz.md
@@ -8,7 +8,7 @@ dashedName: general-fizzbuzz
 
 # --description--
 
-Write a generalized version of <a href="https://rosettacode.org/wiki/FizzBuzz" target="_blank" rel="noopener noreferrer nofollow">FizzBuzz</a> that works for any list of factors, along with their words.
+Escreva uma versão generalizada do algoritmo <a href="https://rosettacode.org/wiki/FizzBuzz" target="_blank" rel="noopener noreferrer nofollow">FizzBuzz</a>, que funcione para qualquer lista de fatores, juntamente com suas palavras.
 
 Esta é basicamente uma implementação de "fizzbuzz" onde as regras do jogo são fornecidas ao utilizador. Crie uma função para implementar isso. A função deve receber dois parâmetros.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/generate-lower-case-ascii-alphabet.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/generate-lower-case-ascii-alphabet.md
index b535155336d..ff9a362a9a4 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/generate-lower-case-ascii-alphabet.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/generate-lower-case-ascii-alphabet.md
@@ -8,7 +8,7 @@ dashedName: generate-lower-case-ascii-alphabet
 
 # --description--
 
-Write a function to generate an array of lower case ASCII characters for a given range. For example, given the range `['a', 'd']`, the function should return `['a', 'b', 'c', 'd']`.
+Escreva uma função para gerar um array de caracteres ASCII em letras minúsculas para um determinado intervalo. Por exemplo, dado o intervalo `['a', 'd']`, a função deve retornar `['a', 'b', 'c', 'd']`.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/generator-exponential.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/generator-exponential.md
index fccb26ce293..659c662c8dc 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/generator-exponential.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/generator-exponential.md
@@ -8,7 +8,7 @@ dashedName: generatorexponential
 
 # --description--
 
-A generator is an executable entity (like a function or procedure) that contains code that yields a sequence of values, one at a time, so that each time you call the generator, the next value in the sequence is provided.
+Um gerador é uma entidade executável (como uma função ou procedimento) que contém um código que retorna uma sequência de valores, um de cada vez, para que a cada vez que você chame o gerador, o próximo valor na sequência seja fornecido.
 
 Os geradores muitas vezes são criados a partir de co-rotinas ou objetos para que o estado interno do objeto seja tratado "naturalmente".
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/gray-code.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/gray-code.md
index 31a37ef4fee..7233536e83c 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/gray-code.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/gray-code.md
@@ -8,7 +8,7 @@ dashedName: gray-code
 
 # --description--
 
-Gray code is a form of binary encoding where transitions between consecutive numbers differ by only one bit.
+O Código de Gray é uma forma de codificação binária, onde as transições entre números consecutivos diferem apenas em um bit.
 
 Esta é uma codificação útil para reduzir riscos de dados de hardware com valores que se alteram rapidamente e/ou estejam associados ao hardware mais lento como entradas.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/greatest-common-divisor.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/greatest-common-divisor.md
index cbff200f30f..d7a90156c16 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/greatest-common-divisor.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/greatest-common-divisor.md
@@ -8,7 +8,7 @@ dashedName: greatest-common-divisor
 
 # --description--
 
-Write a function that returns the greatest common divisor of two integers.
+Escreva uma função que retorne o máximo divisor comum de dois inteiros.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/greatest-subsequential-sum.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/greatest-subsequential-sum.md
index 560c9c25209..6750c4c50cf 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/greatest-subsequential-sum.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/greatest-subsequential-sum.md
@@ -8,7 +8,7 @@ dashedName: greatest-subsequential-sum
 
 # --description--
 
-Given a sequence of integers, find a continuous subsequence which maximizes the sum of its elements, that is, the elements of no other single subsequence add up to a value larger than this one.
+Dada uma sequência de números inteiros, encontre uma subsequência contínua que maximize a soma de seus elementos, ou seja, os elementos de nenhuma outra subsequência somam um valor superior a este.
 
 Uma subsequência vazia é considerada ter a soma de \\( 0 \\). Portanto, se todos os elementos são negativos, o resultado deve ser a sequência vazia.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hailstone-sequence.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hailstone-sequence.md
index b4922dcf429..68e2ca42adb 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hailstone-sequence.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hailstone-sequence.md
@@ -8,9 +8,9 @@ dashedName: hailstone-sequence
 
 # --description--
 
-The Hailstone sequence of numbers can be generated from a starting positive integer, `n` by:
+A sequência de números de granizo (hailstone) pode ser gerada a partir de um inteiro inicial positivo, `n` da seguinte forma:
 
-- If `n` is `1` then the sequence ends
+- Se `n` for `1`, a sequência termina
 - Se `n` for `even` (par), o próximo `n` da sequência será `= n/2`
 - Se `n` for `odd` (ímpar), o próximo `n` da sequência será `= (3 * n) + 1`
 
@@ -20,7 +20,7 @@ A sequência de granizo também é conhecida como números granizo (porque os va
 
 # --instructions--
 
-1. Create a routine to generate the hailstone sequence for a number
+1. Crie uma rotina para gerar a sequência de Hailstone para um número
 2. A função deve retornar um array com o número menor que `limit` que tenha a maior sequência de hailstone e o tamanho da sequência. (Mas não mostrar a sequência real!)
 
 # --hints--
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/happy-numbers.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/happy-numbers.md
index 6009c746630..4fa67185d1b 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/happy-numbers.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/happy-numbers.md
@@ -8,7 +8,7 @@ dashedName: happy-numbers
 
 # --description--
 
-A happy number is defined by the following process:
+Um número feliz é definido pelo seguinte processo:
 
 Começando por qualquer número inteiro positivo, substitua o número pela soma dos quadrados de seus dígitos. Repita o processo até que o número seja igual a `1` (onde ele permanecerá), ou faça laços infinitamente em um ciclo que não inclui o `1`. Os números para os quais este processo termina em `1` são números felizes, enquanto aqueles que não terminam em `1` são números infelizes.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/harshad-or-niven-series.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/harshad-or-niven-series.md
index 4f9d4bdd45c..12d74f73a46 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/harshad-or-niven-series.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/harshad-or-niven-series.md
@@ -8,7 +8,7 @@ dashedName: harshad-or-niven-series
 
 # --description--
 
-The Harshad or Niven numbers are positive integers ≥ 1 that are divisible by the sum of their digits.
+Os números de Harshad ou de Niven são inteiros positivos ≥ 1 que são divisíveis pela soma de seus dígitos.
 
 Por exemplo, `42` é um número de Harshad, pois `42` é divisível por `(4 + 2)` sem resto.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hash-from-two-arrays.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hash-from-two-arrays.md
index 51b4818d2c1..34615e10f9f 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hash-from-two-arrays.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hash-from-two-arrays.md
@@ -8,7 +8,7 @@ dashedName: hash-from-two-arrays
 
 # --description--
 
-Given two arrays, create a hash object where the elements from one array (the keys) are linked to the elements of the other (the values).
+Dados dois arrays, crie um objeto hash onde os elementos de um array (as chaves) estejam ligados aos elementos do outro array (os valores).
 
 Exemplo:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hash-join.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hash-join.md
index 3af5dcfa8aa..e3ff5a634e5 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hash-join.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hash-join.md
@@ -8,14 +8,14 @@ dashedName: hash-join
 
 # --description--
 
-An inner join is an operation that combines two data tables into one table, based on matching column values. The simplest way of implementing this operation is the nested loop join algorithm, but a more scalable alternative is the hash join algorithm.
+Um inner join é uma operação que combina duas tabelas de dados em uma tabela, com base na correspondência dos valores da coluna. A maneira mais simples de implementar esta operação é o algoritmo de junção de laço aninhado, mas uma alternativa mais escalável é o algoritmo de junção de hashes.
 
 O algoritmo de união de hashes (ou "hash join") consiste em duas etapas:
 
 <ol>
-  <li><strong>Hash phase:</strong> Create a multimap from one of the two tables, mapping from each join column value to all the rows that contain it.</li>
+  <li><strong>Fase de hash:</strong> crie um multimapa a partir de uma das duas tabelas, mapeando a partir de cada valor de coluna da junção para todas as linhas que a contêm.</li>
   <ul>
-    <li>The multimap must support hash-based lookup which scales better than a simple linear search, because that's the whole point of this algorithm.</li>
+    <li>O multimapa deve suportar uma pesquisa baseada em hash, que seja melhor dimensionada do que uma simples pesquisa linear, pois esse é o sentido desse algoritmo.</li>
     <li>Idealmente, devemos criar o multimapa para a tabela menor, assim minimizando seu tempo de criação e o tamanho da memória.</li>
   </ul>
   <li><strong>Fase de união:</strong> escaneie a outra tabela e encontre linhas correspondentes buscando no multimapa criado anteriormente.</li>
@@ -23,18 +23,18 @@ O algoritmo de união de hashes (ou "hash join") consiste em duas etapas:
 
 Em pseudocódigo, o algoritmo poderia ser expresso da seguinte forma:
 
-<pre><strong>let</strong> <i>A</i> = the first input table (or ideally, the larger one)
-<strong>let</strong> <i>B</i> = the second input table (or ideally, the smaller one)
-<strong>let</strong> <i>j<sub>A</sub></i> = the join column ID of table <i>A</i>
-<strong>let</strong> <i>j<sub>B</sub></i> = the join column ID of table <i>B</i>
-<strong>let</strong> <i>M<sub>B</sub></i> = a multimap for mapping from single values to multiple rows of table <i>B</i> (starts out empty)
-<strong>let</strong> <i>C</i> = the output table (starts out empty)
-<strong>for each</strong> row <i>b</i> in table <i>B</i>:
-  <strong>place</strong> <i>b</i> in multimap <i>M<sub>B</sub></i> under key <i>b(j<sub>B</sub>)</i>
-<strong>for each</strong> row <i>a</i> in table <i>A</i>:
-  <strong>for each</strong> row <i>b</i> in multimap <i>M<sub>B</sub></i> under key <i>a(j<sub>A</sub>)</i>:
-    <strong>let</strong> <i>c</i> = the concatenation of row <i>a</i> and row <i>b</i>
-    <strong>place</strong> row <i>c</i> in table <i>C</i>
+<pre><strong>permita que</strong> <i>A</i> = a primeira tabela de entrada (ou idealmente, a maior)
+<strong>permita que</strong> <i>B</i> = a segunda tabela de entrada (ou idealmente, a menor)
+<strong>permita que</strong> <i>j<sub>A</sub></i> = o ID da coluna de união da tabela <i>A</i>
+<strong>permita que</strong> <i>j<sub>B</sub></i> = o ID da coluna de união da tabela <i>B</i>
+<strong>permita que</strong> <i>M<sub>B</sub></i> = um multimapa para o mapeamento de valores únicos para múltiplas linhas da tabela <i>B</i> (começa vazio)
+<strong>permita que</strong> <i>C</i> = a tabela de saída (começa vazia)
+<strong>para cada</strong> linha <i>b</i> na tabela <i>B</i>:
+  <strong>coloque</strong> <i>b</i> no multimapa <i>M<sub>B</sub></i> com a chave <i>b(j<sub>B</sub>)</i>
+<strong>para cada</strong> linha <i>a</i> na tabela <i>A</i>:
+  <strong>para cada</strong> linha <i>b</i> no multimapa <i>M<sub>B</sub></i> com a chave <i>a(j<sub>A</sub>)</i>:
+    <strong>permita que</strong> <i>c</i> = a concatenação da linha <i>a</i> e da linha <i>b</i>
+    <strong>coloque</strong> a linha <i>c</i> na tabela <i>C</i>
 </pre>
 
 # --instructions--
@@ -52,8 +52,8 @@ Implemente o algoritmo de "hash join" como uma função e demonstre que ele pass
           <td style="border:none">
             <table>
               <tr>
-                <th style="padding: 4px; margin: 5px;">Age</th>
-                <th style="padding: 4px; margin: 5px;">Name</th>
+                <th style="padding: 4px; margin: 5px;">Idade</th>
+                <th style="padding: 4px; margin: 5px;">Nome</th>
               </tr>
               <tr>
                 <td style="padding: 4px; margin: 5px;">27</td>
@@ -82,8 +82,8 @@ Implemente o algoritmo de "hash join" como uma função e demonstre que ele pass
           <td style="border:none">
             <table>
               <tr>
-                <th style="padding: 4px; margin: 5px;">Character</th>
-                <th style="padding: 4px; margin: 5px;">Nemesis</th>
+                <th style="padding: 4px; margin: 5px;">Personagem</th>
+                <th style="padding: 4px; margin: 5px;">Inimigo</th>
               </tr>
               <tr>
                 <td style="padding: 4px; margin: 5px;">Jonah</td>
@@ -113,13 +113,13 @@ Implemente o algoritmo de "hash join" como uma função e demonstre que ele pass
             <i>j<sub>A</sub> =</i>
           </td>
           <td style="border:none">
-            <i><code>Name</code> (i.e. column 1)</i>
+            <i><code>Name</code> (ou seja, a coluna 1)</i>
           </td>
           <td style="border:none">
             <i>j<sub>B</sub> =</i>
           </td>
           <td style="border:none">
-            <i><code>Character</code> (i.e. column 0)</i>
+            <i><code>Character</code> (ou seja, a coluna 0)</i>
           </td>
         </tr>
       </table>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/heronian-triangles.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/heronian-triangles.md
index 885787a2378..4b537fe3def 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/heronian-triangles.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/heronian-triangles.md
@@ -8,7 +8,7 @@ dashedName: heronian-triangles
 
 # --description--
 
-Hero's formula for the area of a triangle given the length of its three sides `a`, `b`, and `c` is given by:
+A fórmula de Hero para a área de um triângulo dado o comprimento de seus três lados `a`, `b` e `c` é dada por:
 
 $A = \\sqrt{s(s-a)(s-b)(s-c)},$
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hofstadter-figure-figure-sequences.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hofstadter-figure-figure-sequences.md
index 0b5a52cc5f8..483ba2e639c 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hofstadter-figure-figure-sequences.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hofstadter-figure-figure-sequences.md
@@ -8,7 +8,7 @@ dashedName: hofstadter-figure-figure-sequences
 
 # --description--
 
-The Hofstadter Figure-Figure sequences $R_n$ and $S_n$ are given by
+As sequências de figura-figura de Hofstadter $R_n$ e $S_n$ são dadas por
 
 $R_1 = 1\\ ;\\ S_1 = 2 \\\\R_n = R_{n-1} + S_{n-1}, \\quad n>1.$
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hofstadter-q-sequence.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hofstadter-q-sequence.md
index b708b1c5a8f..b75f524875a 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hofstadter-q-sequence.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/hofstadter-q-sequence.md
@@ -8,7 +8,7 @@ dashedName: hofstadter-q-sequence
 
 # --description--
 
-The Hofstadter Q sequence is defined as:
+A sequência de Hofstadter Q é definida como:
 
 $Q(1)=Q(2)=1, \\\\ Q(n)=Q\\big(n-Q(n-1)\\big)+Q\\big(n-Q(n-2)), \\quad n>2.$
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/i-before-e-except-after-c.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/i-before-e-except-after-c.md
index ab78ec885d4..e5e96cc2768 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/i-before-e-except-after-c.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/i-before-e-except-after-c.md
@@ -8,13 +8,13 @@ dashedName: i-before-e-except-after-c
 
 # --description--
 
-**<a href="http://www.rosettacode.org/wiki/I_before_E_except_after_C" target="_blank" rel="noopener noreferrer nofollow">"I before E, except after C"</a>** is a general rule for English language spelling. If one is unsure whether a word is spelled with the digraph `ei` or `ie`, the rhyme suggests that the correct order is `ie` unless the preceding letter is `c`, in which case it may be `ei`.
+**<a href="http://www.rosettacode.org/wiki/I_before_E_except_after_C" target="_blank" rel="noopener noreferrer nofollow">"I antes de E, exceto após o C"</a>** é uma regra geral para a ortografia do inglês. Quando não temos certeza se uma palavra é escrita com o dígrafo `ei` ou `ie`, a rima sugere que a ordem correta é `ie`, a menos que a letra anterior seja `c`, caso no qual ele deve ser `ei`.
 
 Usando as palavras fornecidas, verifique se as duas subcláusulas da frase são plausíveis individualmente:
 
 <ol>
   <li>
-    <i>"I before E when not preceded by C".</i>
+    <i>"I antes de E quando não for precedido por C".</i>
   </li>
   <li>
     <i>"E antes de I quando for precedido por C".</i>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/iban.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/iban.md
index 126dadf9c5e..e57f717c73a 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/iban.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/iban.md
@@ -8,7 +8,7 @@ dashedName: iban
 
 # --description--
 
-The International Bank Account Number (IBAN) is an internationally agreed means of identifying bank accounts across national borders with a reduced risk of propagating transcription errors.
+O número internacional de conta bancária (IBAN) é um meio acordado internacionalmente para identificar as contas bancárias para além das fronteiras nacionais com um risco reduzido de propagação de erros de transcrição.
 
 O <abbr title="International Bank Account Number">IBAN</abbr> consiste em até 34 caracteres alfanuméricos:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/identity-matrix.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/identity-matrix.md
index b8b01639332..a7d4fca85f6 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/identity-matrix.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/identity-matrix.md
@@ -8,7 +8,7 @@ dashedName: identity-matrix
 
 # --description--
 
-An *identity matrix* is a square matrix of size \\( n \\times n \\), where the diagonal elements are all `1`s (ones), and all the other elements are all `0`s (zeroes).
+Uma *matriz identidade* é uma matriz quadrada de tamanho \\( n \\times n \\), onde os elementos diagonais são todos `1` (um) e todos os outros elementos são `0`(zero).
 
 <ul>
   <li style='list-style: none;'>\(\displaystyle I_{n}=\begin{bmatrix} 1 &#x26; 0 &#x26; 0 \cr 0 &#x26; 1 &#x26; 0 \cr 0 &#x26; 0 &#x26; 1 \cr \end{bmatrix}\)</li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/iterated-digits-squaring.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/iterated-digits-squaring.md
index ea147503c5c..726b09cfb54 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/iterated-digits-squaring.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/iterated-digits-squaring.md
@@ -8,7 +8,7 @@ dashedName: iterated-digits-squaring
 
 # --description--
 
-If you add the square of the digits of a Natural number (an integer bigger than zero), you always end with either 1 or 89:
+Se você somar o quadrado dos dígitos de um número natural (um número inteiro maior que zero), você sempre terminará com 1 ou 89:
 
 <pre>15 -> 26 -> 40 -> 16 -> 37 -> 58 -> 89
 7 -> 49 -> 97 -> 130 -> 10 -> 1
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/jaro-distance.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/jaro-distance.md
index b3ba790cf5c..3985fabab04 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/jaro-distance.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/jaro-distance.md
@@ -8,7 +8,7 @@ dashedName: jaro-distance
 
 # --description--
 
-The Jaro distance is a measure of similarity between two strings. The higher the Jaro distance for two strings is, the more similar the strings are. The score is normalized such that `0` equates to no similarity and `1` is an exact match.
+A distância de Jaro é uma medida de semelhança entre duas strings. Quanto maior a distância de Jaro entre as duas strings, mais parecidas elas são. A pontuação é normalizada, de modo que `0` é igual a nenhuma similaridade e `1` é uma correspondência exata.
 
 **Definição**
 
@@ -19,8 +19,8 @@ A distância de Jaro \\( d_j \\) de duas strings fornecidas \\(s_1\\) e \\(s_2\\
 Onde:
 
 <ul>
-  <li>\(m\) is the number of <i>matching characters</i>;</li>
-  <li> \(t\) is half the number of <i>transpositions</i>.</li>
+  <li>\(m\) é o número de <i>caracteres correspondentes</i>;</li>
+  <li> \(t\) é a metade do número de <i>transposições</i>.</li>
 </ul>
 
 Dois caracteres de \\(s_1\\) e \\(s_2\\), respectivamente, são considerados *correspondentes* somente se forem iguais e não mais distante do que \\(\\left\\lfloor\\frac{\\max(|s_1|,|s_2|)}{2}\\right\\rfloor-1\\).
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/jortsort.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/jortsort.md
index ad1489e97da..5901ff51040 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/jortsort.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/jortsort.md
@@ -8,7 +8,7 @@ dashedName: jortsort
 
 # --description--
 
-jortSort is a sorting toolset that makes the user do the work and guarantees efficiency because you don't have to sort ever again. It was originally presented by Jenn "Moneydollars" Schiffer at the prestigious JSConf2014.
+jortSort é um conjunto de ferramentas de ordenação que faz com que o usuário faça o trabalho e garante a eficiência porque você não tem que organizar novamente. Ela foi originalmente apresentada por Jenn "Moneydollars" Schiffer no prestigiado JSConf2014.
 
 jortSort deve ser uma função que recebe um único array de objetos comparáveis como argumento. Ela ordena o array em ordem ascendente e compara o array ordenado ao array fornecido inicialmente. Se os arrays corresponderem (ou seja, se o array original já foi ordenado), a função retorna true. Se os arrays não corresponderem (ou seja, se o array original não estiver ordenado), a função retorna false.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/josephus-problem.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/josephus-problem.md
index 87119423525..5e5165ba36f 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/josephus-problem.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/josephus-problem.md
@@ -8,7 +8,7 @@ dashedName: josephus-problem
 
 # --description--
 
-Josephus problem is a math puzzle with a grim description: $n$ prisoners are standing on a circle, sequentially numbered from $0$ to $n-1$.
+O problema de Josephus é um desafio de matemática com uma descrição macabra: $n$ prisoneiros estão de pé, em círculo, sequencialmente numerados de $0$ a $n-1$.
 
 Um carrasco caminha pelo círculo, começando pelo prisioneiro $0$, removendo cada $k$-ésimo prisioneiro e matando-o.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/k-d-tree.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/k-d-tree.md
index 2fd1506ca88..25497321a9a 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/k-d-tree.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/k-d-tree.md
@@ -8,7 +8,7 @@ dashedName: k-d-tree
 
 # --description--
 
-A k-d tree (short for *k*-dimensional tree) is a space-partitioning data structure for organizing points in a k-dimensional space. k-d trees are a useful data structure for several applications, such as searches involving a multidimensional search key (e.g. range searches and nearest neighbor searches). k-d trees are a special case of binary space partitioning trees. k-d trees are not suitable, however, for efficiently finding the nearest neighbor in high dimensional spaces. As a general rule, if the dimensionality is *k*, the number of points in the data, *N*, should be *N* ≫ 2<sup><i>k</i></sup>. Otherwise, when k-d trees are used with high-dimensional data, most of the points in the tree will be evaluated and the efficiency is no better than exhaustive search, and other methods such as approximate nearest-neighbor are used instead.
+Uma árvore k-d (abreviação de árvore *k*-dimensional) é uma estrutura de dados de particionamento de espaço para organizar pontos em um espaço k-dimensional. Árvores k-d são uma estrutura de dados útil para várias aplicações, como pesquisas envolvendo uma chave de pesquisa multidimensional (por exemplo, pesquisas por intervalo e pesquisas pelo vizinho mais próximo). As árvores k-d são um caso especial de árvores de particionamento de espaço binário. As árvores k-d não são adequadas, no entanto, para encontrar com eficiência o vizinho mais próximo em espaços de alta dimensão. Como regra geral, se a dimensionalidade for *k*, o número de pontos nos dados, *N*, deve ser *N* ≫ 2<sup><i>k</i></sup>. Caso contrário, quando as árvores k-d forem usadas com dados de alta dimensão, a maioria dos pontos na árvore será avaliada e a eficiência não será melhor do que em uma pesquisa exaustiva. Outros métodos, como o vizinho mais próximo aproximado, devem ser usados.
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/kaprekar-numbers.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/kaprekar-numbers.md
index 32173d2947d..1376b6d5fa9 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/kaprekar-numbers.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/kaprekar-numbers.md
@@ -8,11 +8,11 @@ dashedName: kaprekar-numbers
 
 # --description--
 
-A positive integer is a Kaprekar number if:
+Um número inteiro positivo é um número de Kaprekar se:
 
 <ul>
-  <li>It is 1, or,</li>
-  <li>The decimal representation of its square may be split once into two parts consisting of positive integers which sum to the original number. </li>
+  <li>É o número 1, ou</li>
+  <li>A representação decimal de seu quadrado puder ser dividida uma vez em duas partes, que consistem em inteiros positivos que, somados, resultam no número original. </li>
 </ul>
 
 Note que uma divisão resultando em uma parte que consiste puramente em 0s não é válida, já que 0 não é considerado um número positivo.
@@ -20,7 +20,7 @@ Note que uma divisão resultando em uma parte que consiste puramente em 0s não
 Exemplo de números de Kaprekar:
 
 <ul>
-  <li><code>2223</code> is a Kaprekar number, as <code>2223 * 2223 = 4941729</code>, <code>4941729</code> may be split to <code>494</code> and <code>1729</code>, and <code>494 + 1729 = 2223</code></li>
+  <li><code>2223</code> é um número de Kaprekar, pois <code>2223 * 2223 = 4941729</code>, <code>4941729</code> pode ser dividido em <code>494</code> e <code>1729</code>, e <code>494 + 1729 = 2223</code></li>
   <li>A série de números de Kaprekar é conhecida como A006886 e começa com <code>1, 9, 45, 55, ...</code></li>
 </ul>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-0-1.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-0-1.md
index 918e3f22c57..546b8ac0a05 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-0-1.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-0-1.md
@@ -8,7 +8,7 @@ dashedName: knapsack-problem0-1
 
 # --description--
 
-The 0-1 knapsack problem is defined as follows:
+O problema da mochila 0-1 é definido da seguinte forma:
 
 Você recebe um array de objetos que representa os itens a serem colocados em uma mochila. Os objetos têm 3 atributos: nome, peso e valor. Os itens precisam ser selecionados de maneira que o peso total não exceda o peso máximo e que o valor seja maximizado.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-bounded.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-bounded.md
index 03f53cf3f62..403c9078e24 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-bounded.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-bounded.md
@@ -8,7 +8,7 @@ dashedName: knapsack-problembounded
 
 # --description--
 
-The bounded knapsack problem is defined as follows:
+O problema da mochila limitado é definido da seguinte forma:
 
 Você recebe um array de objetos que representa os itens a serem colocados em uma mochila. Os objetos têm 4 atributos: nome, peças (a quantidade de um item específico), peso e valor. Os itens precisam ser selecionados de maneira que o peso total não exceda o peso máximo e que o valor seja maximizado. Tenha em mente que cada item pode aparecer entre 0 e `pieces` (peças) vezes.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-continuous.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-continuous.md
index 116d7a5cff9..009f606f34e 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-continuous.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-continuous.md
@@ -8,7 +8,7 @@ dashedName: knapsack-problemcontinuous
 
 # --description--
 
-A thief burgles a butcher's shop, where he can select from some items.
+Um ladrão rouba um açougue, onde ele pode escolher entre alguns itens.
 
 O ladrão sabe os pesos e os preços de cada um dos itens. Como ele tem uma mochila com um limite máximo de peso que ele pode carregar, ele quer selecionar os itens que farão com que ele tenha o máximo de lucro. Ele pode cortar os itens. O item tem um preço reduzido após o corte, que é proporcional ao preço original em razão da proporção das massas. Isso significa que metade de um item tem metade do preço original.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-unbounded.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-unbounded.md
index cd2be71c08f..33af3615a1d 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-unbounded.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knapsack-problem-unbounded.md
@@ -8,7 +8,7 @@ dashedName: knapsack-problemunbounded
 
 # --description--
 
-A traveler gets diverted and has to make an unscheduled stop in what turns out to be Shangri-La. Opting to leave, he is allowed to take as much as he likes of the items available there, so long as it will fit in his knapsack, and he can carry it.
+Um viajante se perde e tem que fazer uma parada não programada em um lugar conhecido como Xangrilá. Quando decide ir embora, permitem que ele leve o quanto quiser dos itens disponíveis lá, desde que caibam em sua mochila e que ele consiga carregar a mochila.
 
 Ele sabe que não pode ter carregar mais do que um valor específico de peso máximo e que a mochila tem um volume limitado de capacidade.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knights-tour.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knights-tour.md
index f10e88e07a1..4add918fd42 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knights-tour.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/knights-tour.md
@@ -8,7 +8,7 @@ dashedName: knights-tour
 
 # --description--
 
-Knight's Tour Problem: You have an empty `width` \* `height` chessboard, but for a single knight on some square. The knight must perform a sequence of legal moves that result in the knight visiting every square on the chessboard exactly once. Note that it is *not* a requirement that the tour be "closed"; that is, the knight need not end within a single move of its start position.
+O problema do passeio do cavalo: você tem um tabuleiro de xadrez vazio de `width` \* `height`, exceto por um único cavalo em uma das posições. O cavalo deve realizar uma sequência de movimentos legais que resultem na visita de todas as posições do tabuleiro exatamente uma única vez. Observe que *não* é um requisito que o passeio seja "fechado". Em outras palavras, o cavalo não precisa terminar a um único movimento de sua posição inicial.
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/largest-int-from-concatenated-ints.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/largest-int-from-concatenated-ints.md
index 0f78b45519b..6d133a25f85 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/largest-int-from-concatenated-ints.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/largest-int-from-concatenated-ints.md
@@ -8,7 +8,7 @@ dashedName: largest-int-from-concatenated-ints
 
 # --description--
 
-Given a set of positive integers, write a function to order the integers in such a way that the concatenation of the numbers forms the largest possible integer and return this integer.
+Dado um conjunto de números inteiros positivos, escreva uma função para ordenar os números de tal forma que a concatenação dos números forme o maior número inteiro possível e retorne este inteiro.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/last-friday-of-each-month.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/last-friday-of-each-month.md
index 7347330d81c..862338a05e3 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/last-friday-of-each-month.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/last-friday-of-each-month.md
@@ -8,7 +8,7 @@ dashedName: last-friday-of-each-month
 
 # --description--
 
-Write a function that returns the date of the last Friday of a given month for a given year.
+Escreva uma função que retorne a data da última sexta-feira de um mês fornecido para um determinado ano.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/last-letter-first-letter.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/last-letter-first-letter.md
index d34d57bac04..8229342dded 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/last-letter-first-letter.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/last-letter-first-letter.md
@@ -8,14 +8,14 @@ dashedName: last-letter-first-letter
 
 # --description--
 
-A certain children's game involves starting with a word in a particular category. Each participant in turn says a word, but that word must begin with the final letter of the previous word. Once a word has been given, it cannot be repeated. If an opponent cannot give a word in the category, they fall out of the game.
+Um certo jogo infantil envolve começar com uma palavra em uma determinada categoria. Cada participante, em sua vez, diz uma palavra, mas essa palavra deve começar com a letra final da palavra anterior. Quando uma palavra é dita, ela não pode ser repetida. Se o oponente não disser uma palavra da categoria, ele sai do jogo.
 
 Por exemplo, com a categoria "animais",
 
-<pre>Child 1: dog
-Child 2: goldfish
-Child 1: hippopotamus
-Child 2: snake
+<pre>Criança 1: cachorro
+Criança 2: onça
+Criança 1: antílope
+Criança 2: elefante
 ...
 </pre>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/leap-year.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/leap-year.md
index 71cdd04483d..fd7268fce9e 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/leap-year.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/leap-year.md
@@ -8,7 +8,7 @@ dashedName: leap-year
 
 # --description--
 
-Determine whether a given year is a leap year in the Gregorian calendar.
+Determine se o ano fornecido é um ano bissexto no calendário Gregoriano.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/least-common-multiple.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/least-common-multiple.md
index 2de70f31787..ae8ac5f6beb 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/least-common-multiple.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/least-common-multiple.md
@@ -8,7 +8,7 @@ dashedName: least-common-multiple
 
 # --description--
 
-The least common multiple of 12 and 18 is 36, because 12 is a factor (12 × 3 = 36), and 18 is a factor (18 × 2 = 36), and there is no positive integer less than 36 that has both factors. As a special case, if either $m$ or $n$ is zero, then the least common multiple is zero. One way to calculate the least common multiple is to iterate all the multiples of $m$, until you find one that is also a multiple of $n$. If you already have $gcd$ for <a href="https://rosettacode.org/wiki/Greatest_common_divisor" target="_blank" rel="noopener noreferrer nofollow">greatest common divisor</a>, then this formula calculates $lcm$.
+O mínimo múltiplo comum de 12 e 18 é 36, porque 12 é um fator (12 × 3 = 36) e 18 é um fator (18 × 2 = 36). Além disso, não há nenhum inteiro positivo menor que 36 que tenha ambos os fatores. Por ser um caso especial, se $m$ ou $n$ for zero, o mínimo múltiplo comum é zero. Uma maneira de calcular o mínimo múltiplo comum é iterar todos os múltiplos de $m$, até encontrar um que também seja múltiplo de $n$. Se você já tiver o $gcd$ para o <a href="https://rosettacode.org/wiki/Greatest_common_divisor" target="_blank" rel="noopener noreferrer nofollow">máximo divisor comum</a>, esta fórmula calcula o $lcm$.
 
 $$ \\operatorname{lcm}(m, n) = \\frac{|m \\times n|}{\\operatorname{gcd}(m, n)} $$
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/left-factorials.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/left-factorials.md
index 95d134f35a5..47815685c85 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/left-factorials.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/left-factorials.md
@@ -8,10 +8,10 @@ dashedName: left-factorials
 
 # --description--
 
-**Left factorials**, $ !n $, may refer to either *subfactorials* or to *factorial sums*. The same notation can be confusingly seen used for the two different definitions. Sometimes, *subfactorials* (also known as *derangements*) may use any of the notations:
+**Fatoriais restantes**, $ !n $, podem se referir a *subfatoriais* ou a *somas de fatorial*. A mesma notação pode ser vista de modo confuso para as duas definições diferentes. Às vezes, *subfatoriais* (também conhecidos como *desarranjos*) podem usar qualquer uma das notações a seguir:
 
 <ul>
-  <li>$!n`$</li>
+  <li>$!n$</li>
   <li>$!n$</li>
   <li>$n¡$</li>
 </ul>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/letter-frequency.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/letter-frequency.md
index d85afe1d775..1ae14471663 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/letter-frequency.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/letter-frequency.md
@@ -8,7 +8,7 @@ dashedName: letter-frequency
 
 # --description--
 
-Given a string, calculate the frequency of each character.
+Ao receber uma string, calcule a frequência de cada caractere.
 
 Todos os caracteres devem ser contados. Isto inclui letras minúsculas e maiúsculas, dígitos, espaços em branco, caracteres especiais ou quaisquer outros caracteres distintos.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/levenshtein-distance.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/levenshtein-distance.md
index 8fcc17bdb24..812f0d28364 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/levenshtein-distance.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/levenshtein-distance.md
@@ -8,14 +8,14 @@ dashedName: levenshtein-distance
 
 # --description--
 
-In information theory and computer science, the **Levenshtein distance** is a metric for measuring the amount of difference between two sequences (i.e. an edit distance). The Levenshtein distance between two strings is defined as the minimum number of edits needed to transform one string into the other, with the allowable edit operations being insertion, deletion, or substitution of a single character.
+Em teoria da informação e em ciência da computação, a **distância de Levenshtein** é uma métrica para medir a quantidade de diferença entre duas sequências (ou seja, uma distância de edição). A distância de Levenshtein entre duas strings é definida como o número mínimo de edições necessárias para transformar uma sequência de caracteres em outra, com as operações de edição permitidas sendo inserção, exclusão ou substituição de um único caractere.
 
 Exemplo:
 
 A distância de Levenshtein entre "**kitten**" e "**sitting**" é 3, já que as três edições a seguir mudam de uma palavra para a outra e não há modo de fazer isso com menos de três edições:
 
 <ul>
-  <li><strong>k</strong>itten   <strong>s</strong>itten    (substitution of 'k' with 's')</li>
+  <li><strong>k</strong>itten   <strong>s</strong>itten    (substituição do 'k' pelo 's')</li>
   <li>sitt<strong>e</strong>n   sitt<strong>i</strong>n    (substituição do 'e' pelo 'i')</li>
   <li>sittin   sittin<strong>g</strong>    (inserção de 'g' ao final).</li>
 </ul>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/linear-congruential-generator.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/linear-congruential-generator.md
index d5a18ce5500..a18a49c8110 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/linear-congruential-generator.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/linear-congruential-generator.md
@@ -8,14 +8,14 @@ dashedName: linear-congruential-generator
 
 # --description--
 
-A linear congruential generator (LCG) is an <em>algorithm</em> that yields a sequence of pseudo-randomized numbers calculated with a discontinuous piecewise linear equation. All linear congruential generators use this formula:
+Um gerador linear de congruência (LCG) é um <em>algoritmo</em> que gera uma sequência de números pseudoaleatórios calculados com uma equação linear descontínua. Todos os geradores congruentes lineares usam esta fórmula:
 
 $$r_{n + 1} = (a \times r_n + c) \bmod m$$
 
 Onde:
 
 <ul>
-<li>$ r_0 $ is a seed.</li>
+<li>$ r_0 $ é uma seed.</li>
 <li>$r_1$, $r_2$, $r_3$, ..., são os números aleatórios.</li>
 <li>$a$, $c$, $m$ são constantes.</li>
 </ul>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/long-multiplication.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/long-multiplication.md
index 4ed6b07b922..91a68162c62 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/long-multiplication.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/long-multiplication.md
@@ -8,7 +8,7 @@ dashedName: long-multiplication
 
 # --description--
 
-Explicitly implement long multiplication.
+Implemente explicitamente uma multiplicação longa.
 
 Esta é uma abordagem possível para a álgebra de números inteiros de precisão arbitrária.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/longest-common-subsequence.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/longest-common-subsequence.md
index 240c7371e9a..05b2a77dd62 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/longest-common-subsequence.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/longest-common-subsequence.md
@@ -8,7 +8,7 @@ dashedName: longest-common-subsequence
 
 # --description--
 
-The **longest common subsequence** (or **LCS**) of groups A and B is the longest group of elements from A and B that are common between the two groups and in the same order in each group. For example, the sequences `1234` and `1224533324` have an LCS of `1234`:
+A **maior subsequência comum** (ou **LCS**) dos grupos A e B é o maior grupo de elementos de A e de B que são comuns entre os dois grupos e na mesma ordem em cada grupo. Por exemplo, as sequências `1234` e `1224533324` têm um LCS de `1234`:
 
 <u>1234</u>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/longest-increasing-subsequence.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/longest-increasing-subsequence.md
index 48996c9e88b..cb46be6aaa4 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/longest-increasing-subsequence.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/longest-increasing-subsequence.md
@@ -8,7 +8,7 @@ dashedName: longest-increasing-subsequence
 
 # --description--
 
-The longest increasing subsequence problem is to find a subsequence of a given sequence in which the subsequence's elements are in sorted order, lowest to highest, and in which the subsequence is as long as possible. An example:
+O problema da maior subsequência crescente é encontrar uma subsequência de uma determinada sequência em que os elementos da subsequência estejam em ordem classificada, do mais baixo para mais alto, e em que a subsequência seja a mais longa possível. Exemplo:
 
 Para o seguinte array:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/longest-string-challenge.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/longest-string-challenge.md
index 5282a81c2fc..41ae00bf414 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/longest-string-challenge.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/longest-string-challenge.md
@@ -8,7 +8,7 @@ dashedName: longest-string-challenge
 
 # --description--
 
-In this challenge, you have to find the strings that are the longest among the given strings.
+Nesse desafio, você precisa encontrar as strings que são as mais longas entre as strings fornecidas.
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/look-and-say-sequence.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/look-and-say-sequence.md
index 14a6fad3c09..e0811794724 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/look-and-say-sequence.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/look-and-say-sequence.md
@@ -8,17 +8,17 @@ dashedName: look-and-say-sequence
 
 # --description--
 
-The Look and say sequence is a recursively defined sequence of numbers.
+A sequência para olhar e dizer é uma sequência de números recursivamente definida.
 
 Definição da sequência
 
-<ul><li>Take a decimal number</li>
+<ul><li>Recebe um número decimal</li>
 <li><span>Olha</span> para o número, agrupando visualmente sequências consecutivas do mesmo dígito.</li>
 <li><span>Diz</span> o número, da esquerda para a direita, grupo após grupo, descrevendo quantos daquele dígito há na sequência, e, logo após, os dígitos agrupados.</li></ul><span> Esse se torna o próximo número da sequência.</span>
 
 Exemplo:
 
-<ul><li>Starting with the number 1, you have <span>one</span> 1 which produces 11</li>
+<ul><li>Começando pelo número 1, você tem <span>um</span> 1, o que gera o número 11</li>
 <li>Começando com 11, você tem <span>dois</span> 1s. Ou seja, 21</li>
 <li>Começando com 21, você tem <span>um</span> 2 e depois <span>um</span> 1. Ou seja: (12)(11), que depois se torna 1211</li>
 <li>Começando com 1211, você tem <span>um</span> 1, <span>um</span> 2 e <span>dois</span> 1s. Ou seja: (11)(12)(21), que depois se torna 111221</li></ul>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/loop-over-multiple-arrays-simultaneously.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/loop-over-multiple-arrays-simultaneously.md
index 812ebc0120a..3b6ffb39e3f 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/loop-over-multiple-arrays-simultaneously.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/loop-over-multiple-arrays-simultaneously.md
@@ -8,7 +8,7 @@ dashedName: loop-over-multiple-arrays-simultaneously
 
 # --description--
 
-Loop over multiple arrays and create a new array whose $i^{th}$ element is the concatenation of $i^{th}$ element of each of the given.
+Percorra diversos arrays e crie um novo array, cujo $i^{o}$ elemento seja a concatenação do $i^{o}$ elemento de cada um dos arrays fornecidos.
 
 Para este exemplo, se você receber este array de arrays:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lu-decomposition.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lu-decomposition.md
index 625424351c5..9072577ebf8 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lu-decomposition.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lu-decomposition.md
@@ -8,7 +8,7 @@ dashedName: lu-decomposition
 
 # --description--
 
-Every square matrix $A$ can be decomposed into a product of a lower triangular matrix $L$ and a upper triangular matrix $U$. This is known as the LU decomposition.
+Toda matriz quadrada $A$ pode ser decomposta em um produto de uma matriz triangular inferior $L$ e uma matriz triangular superior $U$. Essa é conhecida como a decomposição de LU.
 
 $A = LU$
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lucas-lehmer-test.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lucas-lehmer-test.md
index 66d83e519be..35b2ccf2466 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lucas-lehmer-test.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lucas-lehmer-test.md
@@ -8,7 +8,7 @@ dashedName: lucas-lehmer-test
 
 # --description--
 
-Lucas-Lehmer Test: for $p$ an odd prime, the Mersenne number $2^p-1$ is prime if and only if $2^p-1$ divides $S(p-1)$ where $S(n+1)=(S(n))^2-2$, and $S(1)=4$.
+Teste de Lucas-Lehmer: para um primo ímpar $p$, o número de Mersenne $2^p-1$ é primo se e somente se $2^p-1$ puder dividir $S(p-1)$, onde $S(n+1)=(S(n))^2-2$ e $S(1)=4$.
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/ludic-numbers.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/ludic-numbers.md
index 2d2f2fd4beb..daa1537d80e 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/ludic-numbers.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/ludic-numbers.md
@@ -8,7 +8,7 @@ dashedName: ludic-numbers
 
 # --description--
 
-Ludic numbers are related to prime numbers as they are generated by a sieve quite like the Sieve of Eratosthenes is used to generate prime numbers.
+Os números lúdicos estão relacionados aos números primos, pois são gerados por uma peneira semelhante à peneira de Eratóstenes, usada para gerar números primos.
 
 O primeiro número lúdico é 1.
 
@@ -19,26 +19,26 @@ Para gerar os próximos números lúdicos, crie um array de números inteiros cr
 (Gere o laço)
 
 <ul>
-  <li>Take the first member of the resultant array as the next ludic number <span style='color:blue;font-weight:bold'>2</span>.</li>
-  <li>Remove every <strong>2<sup>nd</sup></strong> indexed item from the array (including the first).</li>
+  <li>Pegue o primeiro elemento do array resultante como sendo o próximo número lúdico <span style='color:blue;font-weight:bold'>2</span>.</li>
+  <li>Remova cada <strong>2<sup>o</sup></strong> item indexado do array (incluindo o primeiro array).</li>
   <code style='margin-left: 2em;'><span style='color:blue;font-weight:bold;'><s>2</s></span> 3 <s>4</s> 5 <s>6</s> 7 <s>8</s> 9 <s>10</s> 11 <s>12</s> 13 <s>14</s> 15 <s>16</s> 17 <s>18</s> 19 <s>20</s> 21 <s>22</s> 23 <s>24</s> 25 <s>26</s> ...</code>
 </ul>
 
 <ul>
-  <li>(Unrolling a few loops...)</li>
+  <li>(Após alguns laços...)</li>
   <li>Pegue o primeiro elemento do array resultante como sendo o próximo número lúdico <span style='color:blue;font-weight:bold'>3</span>.</li>
   <li>Remova cada <strong>3<sup>o</sup></strong> item indexado do array (incluindo o primeiro array).</li>
   <code style='margin-left: 2em;'><span style='color:blue;font-weight:bold'><s>3</s></span> 5 7 <s>9</s> 11 13 <s>15</s> 17 19 <s>21</s> 23 25 <s>27</s> 29 31 <s>33</s> 35 37 <s>39</s> 41 43 <s>45</s> 47 49 <s>51</s> ...</code>
 </ul>
 
 <ul>
-  <li>Take the first member of the resultant array as the next ludic number <span style='color:blue;font-weight:bold'>5</span>.</li>
+  <li>Pegue o primeiro elemento do array resultante como sendo o próximo número lúdico <span style='color:blue;font-weight:bold'>5</span>.</li>
   <li>Remova cada <strong>5<sup>o</sup></strong> item indexado do array (incluindo o primeiro array).</li>
   <code style='margin-left: 2em;'><span style='color:blue;font-weight:bold'><s>5</s></span> 7 11 13 17 <s>19</s> 23 25 29 31 <s>35</s> 37 41 43 47 <s>49</s> 53 55 59 61 <s>65</s> 67 71 73 77 ...</code>
 </ul>
 
 <ul>
-  <li>Take the first member of the resultant array as the next ludic number <span style='color:blue;font-weight:bold'>7</span>.</li>
+  <li>Pegue o primeiro elemento do array resultante como sendo o próximo número lúdico <span style='color:blue;font-weight:bold'>7</span>.</li>
   <li>Remova cada <strong>7<sup>o</sup></strong> item indexado do array (incluindo o primeiro array).</li>
   <code style='margin-left: 2em;'><span style='color:blue;font-weight:bold'><s>7</s></span> 11 13 17 23 25 29 <s>31</s> 37 41 43 47 53 55 <s>59</s> 61 67 71 73 77 83 <s>85</s> 89 91 97 ...</code>
 </ul>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/luhn-test-of-credit-card-numbers.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/luhn-test-of-credit-card-numbers.md
index 9453c6e5642..9ea63902329 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/luhn-test-of-credit-card-numbers.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/luhn-test-of-credit-card-numbers.md
@@ -8,16 +8,16 @@ dashedName: luhn-test-of-credit-card-numbers
 
 # --description--
 
-The Luhn test is used by some credit card companies to distinguish valid credit card numbers from what could be a random selection of digits.
+O teste de Luhn é usado por algumas empresas de cartões de crédito para distinguir números válidos de cartão de crédito do que poderia ser uma seleção aleatória de dígitos.
 
 Essas empresas que usam números de cartão de crédito que podem ser validados pelo teste de Luhn têm números que passam no teste a seguir:
 
 <ol>
-  <li> Reverse the order of the digits in the number.</li>
+  <li> Inverter a ordem dos dígitos no número.</li>
   <li> Pegar o primeiro, o terceiro, ... e qualquer outro dígito ímpar nos dígitos invertidos e somá-los para formar a soma parcial s1</li>
   <li> Tomando o segundo, o quarto ... e todos os outros dígitos pares nos dígitos invertidos:</li>
     <ol>
-      <li>Multiply each digit by two and sum the digits if the answer is greater than nine to form partial sums for the even digits.</li>
+      <li>Multiplicar cada algarismo por dois e somar os dígitos se a resposta for maior que nove para formar somas parciais para os dígitos pares.</li>
       <li>Somar as somas parciais dos dígitos pares para formar s2.</li>
     </ol>
   <li>Se s1 + s2 terminar em zero, então o número original está na forma de um número de cartão de crédito válido, conforme verificado pelo teste de Luhn.</li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lychrel-numbers.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lychrel-numbers.md
index a13ba171f94..44055a83104 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lychrel-numbers.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lychrel-numbers.md
@@ -9,12 +9,12 @@ dashedName: lychrel-numbers
 # --description--
 
 <ol>
-  <li>Take an integer <code>n₀</code>, greater than zero.</li>
+  <li>Receba um número inteiro <code>n₀</code>, maior que zero.</li>
   <li>Forme o próximo número <code>n</code> da série invertendo <code>n₀</code> e adicionando-a a <code>n₀</code></li>
   <li>Pare quando <code>n</code> se tornar palindrômico - ou seja, os dígitos de <code>n</code> na ordem inversa == <code>n</code>.</li>
 </ol>
 
-The above recurrence relation when applied to most starting numbers `n` = 1, 2, ... terminates in a palindrome quite quickly.
+A relação de recorrência acima, quando aplicada à maioria dos números iniciais `n` = 1, 2, ... termina rapidamente em um palíndromo.
 
 Por exemplo, se `n₀` = 12, temos we get:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lzw-compression.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lzw-compression.md
index f18e288090d..5c7535cca7d 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lzw-compression.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/lzw-compression.md
@@ -8,7 +8,7 @@ dashedName: lzw-compression
 
 # --description--
 
-The Lempel-Ziv-Welch (LZW) algorithm provides loss-less data compression.
+O algoritmo de Lempel-Ziv-Welch (LZW) fornece compressão de dados sem perda.
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/s-expressions.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/s-expressions.md
index 18e5ae2c7f6..4e45319a4c3 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/s-expressions.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/s-expressions.md
@@ -8,7 +8,7 @@ dashedName: s-expressions
 
 # --description--
 
-<a href="https://rosettacode.org/wiki/S-expressions" target="_blank" rel="noopener noreferrer nofollow">S-Expressions</a> are one convenient way to parse and store data.
+<a href="https://rosettacode.org/wiki/S-expressions" target="_blank" rel="noopener noreferrer nofollow">S-Expressões S</a> são um modo conveniente de fazer o parsing e o armazenamento dos dados.
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sailors-coconuts-and-a-monkey-problem.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sailors-coconuts-and-a-monkey-problem.md
index 95982d85c3c..be655b05bde 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sailors-coconuts-and-a-monkey-problem.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sailors-coconuts-and-a-monkey-problem.md
@@ -8,7 +8,7 @@ dashedName: sailors-coconuts-and-a-monkey-problem
 
 # --description--
 
-Five sailors are shipwrecked on an island and collect a large pile of coconuts during the day.
+Cinco marinheiros são náufragos em uma ilha e coletam muitos cocos durante o dia.
 
 Naquela noite, o primeiro marinheiro acorda e decide tomar a sua parte dos cocos mais cedo, então tenta dividir o monte de cocos igualmente em cinco pilhas, mas descobre que ainda há um coco sobrando. Então, ele o joga para um macaco e então esconde "sua" pilha, uma das cinco pilhas de cocos de tamanho igual, e empurra os outros quatro montes para formar um único monte visível de cocos novamente e vai para a cama.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/search-a-list-of-records.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/search-a-list-of-records.md
index 8396160ba43..70a216dc0c6 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/search-a-list-of-records.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/search-a-list-of-records.md
@@ -8,7 +8,7 @@ dashedName: search-a-list-of-records
 
 # --description--
 
-A record consists of attributes that describe an entity. Each attribute has a name and a value. For example, a person can have an attribute `age` with a value of 25. An important operation on a list of records is to find a record with a particular attribute value.
+Um registro é composto de atributos que descrevem uma entidade. Cada atributo tem um nome e um valor. Por exemplo, uma pessoa pode ter um atributo `age` (idade) com um valor de 25. Uma operação importante em uma lista de registros é encontrar um registro com um valor de atributo específico.
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sedols.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sedols.md
index 60b43a1bb30..0ca1e2b3496 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sedols.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sedols.md
@@ -8,7 +8,7 @@ dashedName: sedols
 
 # --description--
 
-<abbr title="Stock Exchange Daily Official List">SEDOL</abbr> is a list of securities identification numbers issued by the London Stock Exchange.
+A <abbr title="Stock Exchange Daily Official List">SEDOL</abbr> é uma lista de números de identificação de segurança emitidos pela Bolsa de Valores de Londres.
 
 Para cada lista de números de 6 algarismos da <abbr title="Stock Exchange Daily Official List">SEDOL</abbr>, calcule e acrescente o algarismo da soma de verificação. Ou seja, dada a string de entrada à esquerda, sua função deve retornar a string correspondente à direita:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/self-describing-numbers.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/self-describing-numbers.md
index 24b23b7977a..9808f0e9f97 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/self-describing-numbers.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/self-describing-numbers.md
@@ -8,14 +8,14 @@ dashedName: self-describing-numbers
 
 # --description--
 
-There are several so-called "self-describing" or "self-descriptive" integers.
+Há vários inteiros chamados "autodescritivos" ou "de autodescrição".
 
 Diz-se que um número inteiro é "autodescritivo" quando ele tem uma propriedade que, quando as posições dos dígitos são rotuladas de 0 a N-1, o algarismo em cada posição é igual ao número de vezes em que o algarismo aparece no número.
 
 Por exemplo, **2020** é um número autodescritivo de quatro dígitos:
 
 <ul>
-    <li> position 0 has value 2 and there are two 0s in the number; </li>
+    <li> a posição 0 tem o valor 2 e há dois 0s no número; </li>
     <li> a posição 1 tem valor 0 e o número 1 não é encontrado no número; </li>
     <li> a posição 2 tem o valor 2 e há dois 2s no número; </li>
     <li> a posição 3 tem o valor 0 e o número 3 não é encontrado no número; </li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/self-referential-sequence.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/self-referential-sequence.md
index 7e1d17746ee..ebd06cef2ac 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/self-referential-sequence.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/self-referential-sequence.md
@@ -8,7 +8,7 @@ dashedName: self-referential-sequence
 
 # --description--
 
-There are several ways to generate a self-referential sequence. One very common one (the <a href="https://rosettacode.org/wiki/Look-and-say_sequence" target="_blank" rel="noopener noreferrer nofollow">Look-and-say sequence</a>) is to start with a positive integer, then generate the next term by concatenating enumerated groups of adjacent alike digits:
+Existem várias maneiras de gerar uma sequência autorreferencial. Uma maneira muito comum (a <a href="https://rosettacode.org/wiki/Look-and-say_sequence" target="_blank" rel="noopener noreferrer nofollow">Sequência de olhar e dizer</a>) é começar com um número inteiro positivo e gerar o próximo termo concatenando grupos enumerados de dígitos adjacentes semelhantes:
 
 <pre>0, 10, 1110, 3110, 132110, 1113122110, 311311222110 ...</pre>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/semiprime.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/semiprime.md
index 2d76476fcc2..d383ac7fe34 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/semiprime.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/semiprime.md
@@ -8,7 +8,7 @@ dashedName: semiprime
 
 # --description--
 
-Semiprime numbers are natural numbers that are products of exactly two (possibly equal) <a href="https://rosettacode.org/wiki/prime_number" target="_blank" rel="noopener noreferrer nofollow">prime numbers</a>.
+Números semiprimos são números naturais que são produtos de dois <a href="https://rosettacode.org/wiki/prime_number" target="_blank" rel="noopener noreferrer nofollow">números primos</a> (que podem ser iguais).
 
 <pre>1679  =  23 x 73</pre>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/set-consolidation.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/set-consolidation.md
index f7f95b31d6d..19098c43e27 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/set-consolidation.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/set-consolidation.md
@@ -8,10 +8,10 @@ dashedName: set-consolidation
 
 # --description--
 
-Given two sets of items then if any item is common to any set then the result of applying *consolidation* to those sets is a set of sets whose contents is:
+Dados dois conjuntos de itens, se qualquer item for comum a qualquer dos conjuntos, o resultado de aplicar a *consolidação* àqueles conjuntos é um conjunto de conjuntos, cujo conteúdo é:
 
 <ul>
-  <li>The two input sets if no common item exists between the two input sets of items.</li>
+  <li>Os dois conjuntos de entrada, se não existir nenhum item comum entre os dois conjuntos de itens de entrada.</li>
   <li>O conjunto único que é a união dos dois conjuntos de entrada define se partilham um item em comum.</li>
 </ul>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/set-of-real-numbers.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/set-of-real-numbers.md
index a7a8dcd8cea..f01bb8f5327 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/set-of-real-numbers.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/set-of-real-numbers.md
@@ -8,13 +8,13 @@ dashedName: set-of-real-numbers
 
 # --description--
 
-All real numbers form the uncountable set ℝ. Among its subsets, relatively simple are the convex sets, each expressed as a range between two real numbers *a* and *b* where *a* ≤ *b*. There are actually four cases for the meaning of "between", depending on open or closed boundary:
+Todos os números reais formam o conjunto incontável ℝ. Among its subsets, relatively simple are the convex sets, each expressed as a range between two real numbers *a* and *b* where *a* ≤ *b*. Na verdade, há quatro casos para o significado de "entre", dependendo dos limites abertos ou fechados:
 
 <ul>
-  <li>[<i>a</i>, <i>b</i>]: {<i>x</i> | <i>a</i> ≤ <i>x</i> and <i>x</i> ≤ <i>b</i> }</li>
-  <li>(<i>a</i>, <i>b</i>): {<i>x</i> | <i>a</i> < <i>x</i> and <i>x</i> < <i>b</i> }</li>
-  <li>[<i>a</i>, <i>b</i>): {<i>x</i> | <i>a</i> ≤ <i>x</i> and <i>x</i> < <i>b</i> }</li>
-  <li>(<i>a</i>, <i>b</i>]: {<i>x</i> | <i>a</i> < <i>x</i> and <i>x</i> ≤ <i>b</i> }</li>
+  <li>[<i>a</i>, <i>b</i>]: {<i>x</i> | <i>a</i> ≤ <i>x</i> e <i>x</i> ≤ <i>b</i> }</li>
+  <li>(<i>a</i>, <i>b</i>): {<i>x</i> | <i>a</i> < <i>x</i> e <i>x</i> < <i>b</i> }</li>
+  <li>[<i>a</i>, <i>b</i>): {<i>x</i> | <i>a</i> ≤ <i>x</i> e <i>x</i> < <i>b</i> }</li>
+  <li>(<i>a</i>, <i>b</i>]: {<i>x</i> | <i>a</i> < <i>x</i> e <i>x</i> ≤ <i>b</i> }</li>
 </ul>
 
 Observe que, se *a* = *b*, dos quatro, apenas \[*a*, *a*] não seria vazio.
@@ -22,12 +22,12 @@ Observe que, se *a* = *b*, dos quatro, apenas \[*a*, *a*] não seria vazio.
 **Tarefa**
 
 <ul>
-  <li>Devise a way to represent any set of real numbers, for the definition of "any" in the implementation notes below.</li>
+  <li>Elabore uma forma de representar qualquer conjunto de números reais, para a definição de "qualquer" nas notas de implementação abaixo.</li>
   <li>Forneça métodos para estas operações com conjuntos comuns (<i>x</i> é um número real; <i>A</i> e <i>B</i> são conjuntos):</li>
   <ul>
     <li>
-      <i>x</i> ∈ <i>A</i>: determine if <i>x</i> is an element of <i>A</i><br>
-      example: 1 is in [1, 2), while 2, 3, ... are not.
+      <i>x</i> ∈ <i>A</i>: determine se <i>x</i> é um elemento de <i>A</i><br>
+      exemplo: 1 está em [1, 2), enquanto 2, 3, ... não estão.
     </li>
     <li>
       <i>A</i> ∪ <i>B</i>: união de <i>A</i> e <i>B</i>, ou seja, {<i>x</i> | <i>x</i> ∈ <i>A</i> ou <i>x</i> ∈ <i>B</i>}<br>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sha-1.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sha-1.md
index bb1131bcc7a..b0357cd178f 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sha-1.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sha-1.md
@@ -8,7 +8,7 @@ dashedName: sha-1
 
 # --description--
 
-**SHA-1** or **SHA1** is a one-way hash function; it computes a 160-bit message digest.
+**SHA-1** ou **SHA1** é uma função hash de mão única; ela calcula um message digest de 160-bit.
 
 O SHA-1 aparece frequentemente em protocolos de segurança; por exemplo, muitos sites HTTPS usam RSA com SHA-1 para proteger suas conexões.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sha-256.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sha-256.md
index 940d50bf346..903f15c7661 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sha-256.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sha-256.md
@@ -8,7 +8,7 @@ dashedName: sha-256
 
 # --description--
 
-The `SHA-2` family is a stronger alternative to `SHA-1`. The main difference between them is the length of the hash. Meaning `SHA-1` provides a shorter code with fewer possibilities for unique combinations. `SHA-2` or `SHA-256` creates a longer and thus more complex hash with more possibilities.
+A família `SHA-2` é uma alternativa mais forte a `SHA-1`. A principal diferença entre elas é o comprimento do hash. Significa que a `SHA-1` fornece um código mais curto com menos possibilidades para combinações únicas. `SHA-2` ou `SHA-256` cria um hash mais longo e, portanto, mais complexo com mais possibilidades.
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-an-array-of-composite-structures.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-an-array-of-composite-structures.md
index de27f32ff39..163de126fbf 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-an-array-of-composite-structures.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-an-array-of-composite-structures.md
@@ -8,7 +8,7 @@ dashedName: sort-an-array-of-composite-structures
 
 # --description--
 
-Write a function that takes an array of objects as a parameter. The function should sort the array according to the 'key' attribute of the objects and return the sorted array.
+Escreva uma função que receba um array de objetos como parâmetro. A função deve ordenar o array de acordo com o atributo 'key' dos objetos e retornar o array ordenado.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-disjoint-sublist.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-disjoint-sublist.md
index 6f41c07c8c9..33dc8f638b1 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-disjoint-sublist.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-disjoint-sublist.md
@@ -8,7 +8,7 @@ dashedName: sort-disjoint-sublist
 
 # --description--
 
-Given a list of values and a set of integer indices into that value list, the task is to sort the values at the given indices, but preserving the values at indices outside the set of those to be sorted.
+Dada uma lista de valores e um conjunto de índices inteiros nessa lista de valores a tarefa é ordenar os valores nos índices indicados, mas preservando os valores nos índices exteriores ao conjunto dos que devem ser ordenados.
 
 Faça a função funcionar com a seguinte lista de valores e conjunto de índices:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-stability.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-stability.md
index 1175cfb1443..0886be776d4 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-stability.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-stability.md
@@ -8,7 +8,7 @@ dashedName: sort-stability
 
 # --description--
 
-When sorting records in a table by a particular column or field, a <a href="https://www.freecodecamp.org/news/stability-in-sorting-algorithms-a-treatment-of-equality-fa3140a5a539/" target="_blank" rel="noopener noreferrer nofollow">stable sort</a> will always retain the relative order of records that have the same key.
+Ao ordenar registros em uma tabela por uma coluna ou campo específico, uma <a href="https://www.freecodecamp.org/news/stability-in-sorting-algorithms-a-treatment-of-equality-fa3140a5a539/" target="_blank" rel="noopener noreferrer nofollow">ordenação estável</a> sempre manterá a ordem relativa dos registros que têm a mesma chave.
 
 Por exemplo, nesta tabela de países e cidades, uma organização estável na **segunda** coluna, a das cidades, manteria US Birmingham acima de UK Birmingham. (Embora uma ordenação instável *possa*, neste caso, colocar US Birmingham acima de UK Birmingham, uma ordenação estável *garantiria* que isso ocorresse).
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-using-a-custom-comparator.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-using-a-custom-comparator.md
index 7076e434da5..1d1464c4dec 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-using-a-custom-comparator.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sort-using-a-custom-comparator.md
@@ -8,7 +8,7 @@ dashedName: sort-using-a-custom-comparator
 
 # --description--
 
-Write a function to sort an array (or list) of strings in order of descending length, and in ascending lexicographic order for strings of equal length.
+Escrever uma função para ordenar um array (ou lista) de strings em ordem de tamanho decrescente, e em ordem lexicográfica crescente strings de mesmo tamanho.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bead-sort.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bead-sort.md
index 79dd15be8f4..688f5188971 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bead-sort.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bead-sort.md
@@ -8,7 +8,7 @@ dashedName: sorting-algorithmsbead-sort
 
 # --description--
 
-A *bead sort* starts by creating a matrix of zeroes whose length is equal to the value of the largest element in the input array. The matrix is transformed by adding one to all elements between the zeroth index and the index indicated by the current element. This process is repeated, until you have filled the matrix.
+Uma ordenação *Bead Sort* começa criando um array de zeros, cujo comprimento é igual ao valor do maior elemento no array de origem. A matriz é transformada adicionando um a todos os elementos entre o índice zero e o índice indicado pelo elemento atual. Esse processo é repetido, até que você tenha preenchido a matriz.
 
 Iterando sobre a matriz, somando o número de elementos maiores que zero e diminuindo o valor de cada elemento por um temos a matriz ordenada.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bogosort.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bogosort.md
index c43216a2623..da683d04507 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bogosort.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bogosort.md
@@ -8,7 +8,7 @@ dashedName: sorting-algorithmsbogosort
 
 # --description--
 
-Bogosort a list of numbers.
+Faça a ordenação Bogosort de uma lista de números.
 
 O Bogosort simplesmente embaralha uma coleção aleatoriamente até que ela fica ordenada.
 
@@ -20,8 +20,8 @@ O melhor caso é O(n), uma vez que um único passo através dos elementos pode b
 
 Pseudocódigo:
 
-<pre><b>while not</b> InOrder(list) <b>do</b>
-  Shuffle(list)
+<pre><b>while not</b> NaOrdem(lista) <b>do</b>
+  Embaralhar(lista)
 <b>done</b>
 </pre>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-cocktail-sort.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-cocktail-sort.md
index 2e3ce6a9412..7e066e8fbab 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-cocktail-sort.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-cocktail-sort.md
@@ -8,7 +8,7 @@ dashedName: sorting-algorithmscocktail-sort
 
 # --description--
 
-The <a href="https://rosettacode.org/wiki/Sorting_algorithms/Cocktail_sort" target="_blank" rel="noopener noreferrer nofollow">cocktail sort</a> is an improvement on the Bubble Sort. Given an array of numbers, the cocktail sort will traverse the array from start to finish, moving the largest number to the end. Then, it will traverse the array backwards and move the smallest number to the start. It repeats these two passes, moving the next largest/smallest number to its correct position in the array until it is sorted.
+The <a href="https://rosettacode.org/wiki/Sorting_algorithms/Cocktail_sort" target="_blank" rel="noopener noreferrer nofollow">cocktail sort</a> is an improvement on the Bubble Sort. Dado um array de números, a ordenação cocktail fará a travessia do array do início ao fim, movendo o maior número para o final. Em seguida, ela fará a travessia do array de trás para a frente, movendo o menor número para o início. Ela repete essas duas travessias, movendo o próximo maior número e o próximo menor número até suas posições corretas no array until até que este esteja ordenado.
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-comb-sort.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-comb-sort.md
index e40f8b2f622..1a19d4a9016 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-comb-sort.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-comb-sort.md
@@ -8,7 +8,7 @@ dashedName: sorting-algorithmscomb-sort
 
 # --description--
 
-Implement a *comb sort*.
+Implemente uma *ordenação de pente*.
 
 A **ordenação de pente** (Comb Sort) é uma variante da ordenação de bolha (Bubble Sort).
 
@@ -21,16 +21,16 @@ Algumas implementações usam a ordenação de inserção, já que a diferença
 Variantes:
 
 <ul>
-  <li>Combsort11 makes sure the gap ends in (11, 8, 6, 4, 3, 2, 1), which is significantly faster than the other two possible endings.</li>
+  <li>Combsort11 garante que a diferença termine em (11, 8, 6, 4, 3, 2, 1), o que é significativamente mais rápido do que as outras duas terminações possíveis.</li>
   <li>A ordenação de pente com terminações diferentes muda para uma ordenação mais eficiente quando os dados estão quase ordenados (quando a diferença é pequena). A ordenação de pente com diferença baixa não é muito melhor que a ordenação de bolha.</li>
 </ul>
 
 Pseudocódigo:
 
 <pre><b>function</b> combsort(<b>array</b> input)
-  gap := input<b>.size</b> <i>//initialize gap size</i>
+  gap := input<b>.size</b> <i>//inicialize o tamanho da diferença</i>
   <b>loop until</b> gap = 1 <b>and</b> swaps = 0
-    <i>//update the gap value for a next comb. Below is an example</i>
+    <i>//atualize o valor da diferença para o próximo pente. Below is an example</i>
     gap := int(gap / 1.25)
     <b>if</b> gap &#x3C; 1 
       <i>//minimum gap is 1</i>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-gnome-sort.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-gnome-sort.md
index 206d57d95b6..c89cc3d0b3b 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-gnome-sort.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-gnome-sort.md
@@ -8,7 +8,7 @@ dashedName: sorting-algorithmsgnome-sort
 
 # --description--
 
-Gnome sort is a sorting algorithm which is similar to <a href="https://rosettacode.org/wiki/Insertion_sort" target="_blank" rel="noopener noreferrer nofollow">Insertion sort</a>, except that moving an element to its proper place is accomplished by a series of swaps, as in <a href="https://rosettacode.org/wiki/Bubble" target="_blank" rel="noopener noreferrer nofollow">Bubble Sort</a>.
+A ordenação do gnomo é um algoritmo de ordenação semelhante à <a href="https://rosettacode.org/wiki/Insertion_sort" target="_blank" rel="noopener noreferrer nofollow">ordenação de inserção</a>, exceto pelo fato de que mover um elemento para o lugar adequado é realizado por uma série de trocas, como na <a href="https://rosettacode.org/wiki/Bubble" target="_blank" rel="noopener noreferrer nofollow">ordenação de bolha</a>.
 
 O pseudocódigo para o algoritmo é:
 
@@ -17,7 +17,7 @@ O pseudocódigo para o algoritmo é:
   j := 2
   <b>while</b> i &#x3C; size <b>do</b>
     <b>if</b> a[i-1] &#x3C;= a[i] <b>then</b>
-      <i>/// for descending sort, use >= for comparison</i>
+      <i>/// para a ordenação descendente, use >= para a comparação</i>
       i := j
       j := j + 1
     <b>else</b>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-pancake-sort.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-pancake-sort.md
index 934d8aadc0f..045a802807a 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-pancake-sort.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-pancake-sort.md
@@ -8,13 +8,13 @@ dashedName: sorting-algorithmspancake-sort
 
 # --description--
 
-Write a function to sort an array of integers (of any convenient size) into ascending order using Pancake sorting. The function should return the sorted array.
+Escreva uma função para ordenar um array de números inteiros (de qualquer tamanho conveniente) em ordem ascendente usando a ordenação de Panqueca. A função deve retornar o array ordenado.
 
 Em resumo, em vez de serem ordenados elementos individuais, a única operação permitida é "virar" uma extremidade da lista, assim:
 
-<pre>Before:
+<pre>Antes:
 <b>6 7 8 9</b> 2 5 3 4 1<br>
-After:
+Depois:
 <b>9 8 7 6</b> 2 5 3 4 1
 </pre>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-permutation-sort.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-permutation-sort.md
index a4e24cab6d4..bb5f239c405 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-permutation-sort.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-permutation-sort.md
@@ -8,12 +8,12 @@ dashedName: sorting-algorithmspermutation-sort
 
 # --description--
 
-Write a function to implement a permutation sort, which proceeds by generating the possible permutations of the input array until discovering the sorted one. The function should return the sorted array.
+Escreva uma função para implementar uma ordenação de permutação, que gere as possíveis permutações do array de entrada até descobrir a forma ordenada. A função deve retornar o array ordenado.
 
 Pseudocódigo:
 
-<pre><b>while not</b> InOrder(list) <b>do</b>
-  nextPermutation(list)
+<pre><b>while not</b> NaOrdem(lista) <b>do</b>
+  proximaPermutacao(lista)
 <b>done</b>
 </pre>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-shell-sort.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-shell-sort.md
index 46189901e64..4089a8dcc08 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-shell-sort.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-shell-sort.md
@@ -8,7 +8,7 @@ dashedName: sorting-algorithmsshell-sort
 
 # --description--
 
-Write a function to sort an array of elements using the Shell sort algorithm, a diminishing increment sort. The function should return the sorted array.
+Escreva uma função para classificar um array de elementos usando o algoritmo de Shell Sort, uma ordenação com incremento decrescente. A função deve retornar o array ordenado.
 
 A ordenação de concha (também conhecida como método de Shell ou shellsort) recebeu o nome em homenagem ao seu inventor, Donald Shell, que publicou o algoritmo em 1959.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-stooge-sort.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-stooge-sort.md
index 41c4c9d9cd7..bb87248dc6d 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-stooge-sort.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-stooge-sort.md
@@ -8,11 +8,11 @@ dashedName: sorting-algorithmsstooge-sort
 
 # --description--
 
-Write a function to perform Stooge Sort on an array of integers. The function should return a sorted array.
+Escreva uma função para executar ordenação Stooge Sort em um array de números inteiros. A função deve retornar o array ordenado.
 
 O algoritmo de ordenação fantoche é o seguinte:
 
-<pre><b>algorithm</b> stoogesort(<b>array</b> L, i = 0, j = <b>length</b>(L)-1)
+<pre><b>Algoritmo</b> stoogesort(<b>array</b> L, i = 0, j = <b>length</b>(L)-1)
   <b>if</b> L[j] &#x3C; L[i] <b>then</b>
     L[i] <b>↔</b> L[j]
   <b>if</b> j - i > 1 <b>then</b>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-strand-sort.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-strand-sort.md
index 8341f5bd97f..18fa116e2f6 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-strand-sort.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-strand-sort.md
@@ -8,7 +8,7 @@ dashedName: sorting-algorithmsstrand-sort
 
 # --description--
 
-The **Strand sort** creates sorted subsets that are merged to create the final result.
+A ordenação **Strand Sort** cria subconjuntos ordenados que são mesclados para criar o resultado final.
 
 Considere `unsortedArray = [3, 1, 4, 2]`. Escolha o primeiro item `3` e copie-o para um array separado. Procure por qualquer item maior após este item. Quando você encontrar um item maior, neste caso, `4`, copie-o para o array separado, `[3, 4]`, e compare os itens a seguir com este novo valor, `4`.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/soundex.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/soundex.md
index 893602a7b48..3f6d6a9f354 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/soundex.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/soundex.md
@@ -8,7 +8,7 @@ dashedName: soundex
 
 # --description--
 
-**Soundex Algorithm** deals with the *intentions* of the words. It creates a representation for similar sounding words.
+O **Algoritmo Soundex** lida com as *intenções* das palavras. Ele cria uma representação para palavras que soam semelhantes.
 
 Ele é usado para pesquisar <em>nomes</em> e <em>endereços</em>. Isso significa que a pessoa que preencheu o <em>nome</em> pode se concentrar em como ele soa em vez de corrigir a ortografia dos <em>nomes</em>.
 
@@ -21,7 +21,7 @@ Quando você soletrar o nome `Quincy` corretamente na próxima vez, ainda recebe
 Aqui estão as regras:
 
 <ul>
-  <li>If a vowel (A, E, I, O, U) separates two consonants that have the same soundex code, the consonant to the right of the vowel is coded. Tymczak is coded as T-522 (T, 5 for the M, 2 for the C, Z ignored (see "Side-by-Side" rule above), 2 for the K). Since the vowel "A" separates the Z and K, the K is coded.</li>
+  <li>Se uma vogal (A, E, I, O, U) separa duas consoantes que tenham o mesmo código soundex, a consoante à direita da vogal é codificada. Tymczak é codificado como T-522 (T, 5 para M, 2 para o C, Z ignorado – veja a regra "Lado a lado" acima –, 2 para o K). Uma vez que a vogal "A" separa Z e K, o K está codificado.</li>
   <li>Se "H" ou "W" separa duas consoantes que tenham o mesmo código soundex, a consoante à direita da vogal não é codificada. Exemplo: Ashcraft está codificado A-261 (A, 2 para o S, C ignorado, 6 para o R, 1 para o F). Ele não é codificado A-226.</li>
 </ul>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/spiral-matrix.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/spiral-matrix.md
index 21e10beb528..67c3302a5c4 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/spiral-matrix.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/spiral-matrix.md
@@ -8,7 +8,7 @@ dashedName: spiral-matrix
 
 # --description--
 
-Produce a spiral array. A *spiral array* is a square arrangement of the first N<sup>2</sup> natural numbers, where the numbers increase sequentially as you go around the edges of the array spiraling inwards. For example, given **5**, produce this array:
+Produza um array espiral. Um *array espiral* é um arranjo quadrado dos primeiros N<sup>2</sup> números naturais, onde os números aumentam sequencialmente à medida que você vai visitando as arestas do array em uma espiral para dentro. Por exemplo, dado **5**, produza este array:
 
 <pre>
 0  1  2  3  4
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/split-a-character-string-based-on-change-of-character.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/split-a-character-string-based-on-change-of-character.md
index d2a9ca811c8..deeded68695 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/split-a-character-string-based-on-change-of-character.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/split-a-character-string-based-on-change-of-character.md
@@ -8,7 +8,7 @@ dashedName: split-a-character-string-based-on-change-of-character
 
 # --description--
 
-Split a (character) string into comma (plus a blank) delimited strings based on a change of character (left to right). Blanks should be treated as any other character (except they are problematic to display clearly). The same applies to commas. For instance, the string:
+Divida uma string (de caracteres) em vírgulas (mais um espaço em branco) com base em uma mudança de caractere (da esquerda para a direita). Os espaços em branco devem ser tratados como qualquer outro caractere (exceto pelo fato de que são problemáticos para exibir claramente). O mesmo se aplica às vírgulas. Por exemplo, a string:
 
 <pre>
 "gHHH5YY++///\\"
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/stern-brocot-sequence.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/stern-brocot-sequence.md
index b0d6e8abfa4..b0b921bea2d 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/stern-brocot-sequence.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/stern-brocot-sequence.md
@@ -8,10 +8,10 @@ dashedName: stern-brocot-sequence
 
 # --description--
 
-For this task, the Stern-Brocot sequence is to be generated by an algorithm similar to that employed in generating the <a href="https://rosettacode.org/wiki/Fibonacci_sequence" target="_blank" rel="noopener noreferrer nofollow">Fibonacci sequence</a>.
+Para esta tarefa, a sequência Stern-Brocot deve ser gerada por um algoritmo semelhante ao empregado na geração da <a href="https://rosettacode.org/wiki/Fibonacci_sequence" target="_blank" rel="noopener noreferrer nofollow">sequência de Fibonacci</a>.
 
 <ol>
-  <li>The first and second members of the sequence are both 1:</li>
+  <li>O primeiro e o segundo membros da sequência são ambos 1:</li>
     <ul><li>1, 1</li></ul>
   <li>Comece considerando o segundo membro da sequência</li>
   <li>Some o membro considerado da sequência e seu precedente, (1 + 1) = 2, e acrescente-o ao final da sequência:</li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/straddling-checkerboard.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/straddling-checkerboard.md
index e6801f2b829..7b19abcd38f 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/straddling-checkerboard.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/straddling-checkerboard.md
@@ -8,7 +8,7 @@ dashedName: straddling-checkerboard
 
 # --description--
 
-Implement functions to encrypt and decrypt a message using the **straddling checkerboard** method.
+Implemente funções para criptografar e descriptografar uma mensagem usando o método do **tabuleiro de damas escarranchado**.
 
 Cada função receberá dois argumentos, uma string de `message` e um array `alphabet`. O array `alphabet` conterá 3 strings representando as 3 linhas do tabuleiro de verificação.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/stream-merge.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/stream-merge.md
index 1e6c67be918..90cb13e6c6e 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/stream-merge.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/stream-merge.md
@@ -8,7 +8,7 @@ dashedName: stream-merge
 
 # --description--
 
-Write a function that takes multiple sorted arrays of items, and returns one array of sorted items.
+Escreva uma função que receba vários arrays de itens ordenados e retorne um array de itens ordenados.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/strip-control-codes-and-extended-characters-from-a-string.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/strip-control-codes-and-extended-characters-from-a-string.md
index 15858a25bb1..74c3a139e67 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/strip-control-codes-and-extended-characters-from-a-string.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/strip-control-codes-and-extended-characters-from-a-string.md
@@ -8,7 +8,7 @@ dashedName: strip-control-codes-and-extended-characters-from-a-string
 
 # --description--
 
-The task is to strip control codes and extended characters from a string. The solution should demonstrate how to achieve each of the following results: A string with control codes and extended characters stripped. In ASCII, the control codes have decimal codes 0 through to 31 and 127. On an ASCII based system, if the control codes are stripped, the resultant string would have all of its characters within the range of 32 to 126 decimal on the ASCII table. On a non-ASCII based system, we consider characters that do not have a corresponding glyph on the ASCII table (within the ASCII range of 32 to 126 decimal) to be an extended character for the purpose of this task.
+A tarefa é remover códigos de controle e caracteres estendidos de uma string. A solução deve demonstrar como alcançar cada um dos seguintes resultados: uma string com códigos de controle e caracteres estendidos removidos. Em ASCII, os códigos de controle têm códigos decimais 0 até 31 e 127. Em um sistema baseado em ASCII, se os códigos de controle forem removidos, a string resultante teria todos os seus caracteres dentro do intervalo de 32 a 126 decimal na tabela ASCII. Em um sistema não ASCII, consideramos que caracteres que não têm um glifo correspondente na tabela ASCII (dentro do intervalo ASCII de 32 a 126 decimal) são um caráter alargado para efeitos desta tarefa.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/subleq.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/subleq.md
index 21c4a16b83f..c1fb15bc065 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/subleq.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/subleq.md
@@ -8,7 +8,7 @@ dashedName: subleq
 
 # --description--
 
-Subleq is an example of a One-Instruction Set Computer (OISC).
+Subleq é um exemplo de máquina de uma instrução (OISC).
 
 Seu nome vem de sua única instrução, que é **SU**btract and **B**ranch if **L**ess than or **EQ**ual (subtraia e ramifique se for menor ou igual) a zero.
 
@@ -19,7 +19,7 @@ A memória da máquina consiste em um array de números inteiros com sinal. Qual
 A execução começa com o ponteiro de instrução mirando a primeira palavra, que é o endereço 0. Ela prossegue da seguinte forma:
 
 <ol>
-  <li>Let A, B, and C be the value stored in the three consecutive words in memory starting at the instruction pointer.</li>
+  <li>Permita que A, B e C sejam valores armazenado nas três palavras consecutivas na memória, começando no ponteiro de instrução.</li>
   <li>Avance o ponteiro de instrução 3 palavras para apontar para o endereço após o que contém C.</li>
   <li>Se A é -1, então um caractere é lido a partir da entrada padrão e seu ponto de código armazenado no endereço fornecido por B. C não é usado.</li>
   <li>Se B é -1, então o número contido no endereço dado por A é interpretado como um ponto de código e a saída de caractere correspondente. C, mais uma vez, não é utilizado.</li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sudoku.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sudoku.md
index 15d919640ed..2cd37506bac 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sudoku.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sudoku.md
@@ -8,7 +8,7 @@ dashedName: sudoku
 
 # --description--
 
-Write a function to solve a partially filled-in normal 9x9 Sudoku grid and return the result. The blank fields are represented by `-1`.
+Escreva uma função para resolver uma grade 9x9 normal, parcialmente preenchida, e retornar o resultado. Os campos em branco são representados por `-1`.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-digits-of-an-integer.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-digits-of-an-integer.md
index fd6a1044326..06bb2f27cb4 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-digits-of-an-integer.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-digits-of-an-integer.md
@@ -8,10 +8,10 @@ dashedName: sum-digits-of-an-integer
 
 # --description--
 
-Write a function that takes a string as a parameter. This string represents a number that can be in any base (less than 37) and return the sum of its digits.
+Escreva uma função que receba uma string como parâmetro. Essa string representa um número que pode estar em qualquer base (inferior a 37) e que retorne a soma de seus dígitos.
 
 <ul>
-  <li><b>1</b><sub>10</sub> sums to <b>1</b></li>
+  <li><b>1</b><sub>10</sub> soma <b>1</b></li>
   <li><b>1234</b><sub>10</sub> soma <b>10</b></li>
   <li><b>fe</b><sub>16</sub> soma <b>29</b></li>
   <li><b>f0e</b><sub>16</sub> soma <b>29</b></li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-multiples-of-3-and-5.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-multiples-of-3-and-5.md
index 3d07140040d..470e7998c94 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-multiples-of-3-and-5.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-multiples-of-3-and-5.md
@@ -8,7 +8,7 @@ dashedName: sum-multiples-of-3-and-5
 
 # --description--
 
-The objective is to write a function that finds the sum of all positive multiples of 3 or 5 below *n*.
+O objetivo é escrever uma função que encontra a soma de todos os múltiplos positivos de 3 ou 5 abaixo de *n*.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-of-a-series.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-of-a-series.md
index c92ac1c0a85..2f00dc7b3a6 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-of-a-series.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-of-a-series.md
@@ -8,7 +8,7 @@ dashedName: sum-of-a-series
 
 # --description--
 
-Compute the **n**<sup>th</sup> term of a <em>series</em>, i.e. the sum of the **n** first terms of the corresponding <em>sequence</em>. Informally this value, or its limit when **n** tends to infinity, is also called the *sum of the series*, thus the title of this task. For this task, use: $S_n = \displaystyle\sum_{k=1}^n \frac{1}{k^2}$.
+Calcule o **n**<sup></sup>-ésimo termo de uma <em>série</em>, ou seja, a soma dos **n** primeiros termos da <em>sequência</em> correspondente. Informalmente, esse valor, ou seu limite quando **n** tende ao infinito, é também chamado de *soma da série*, razão do título desta tarefa. Para esta tarefa, use: $S_n = \displaystyle\sum_{k=1}^n \frac{1}{k^2}$.
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-of-squares.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-of-squares.md
index 16a32388640..9c14f5d60d5 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-of-squares.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-of-squares.md
@@ -8,7 +8,7 @@ dashedName: sum-of-squares
 
 # --description--
 
-Write a function to find the sum of squares of an array of integers.
+Escreva uma função para encontrar a soma dos quadrados de um array de números inteiros.
 
 # --hints--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-to-100.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-to-100.md
index 0a443c137ed..d4202f94bd4 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-to-100.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sum-to-100.md
@@ -8,7 +8,7 @@ dashedName: sum-to-100
 
 # --description--
 
-Find solutions to the *sum to one hundred* puzzle.
+Encontre soluções para o desafio de *soma até cem*.
 
 Adicione (insira) os operadores matemáticos **+** ou **─** (mais ou menos) antes de cada um dos dígitos na string numérica decimal **123456789**, de modo que a expressão matemática resultante chegue a uma soma específica (no caso conhecido, **100**).
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sutherland-hodgman-polygon-clipping.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sutherland-hodgman-polygon-clipping.md
index 2d25f31f842..541eaf37e34 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sutherland-hodgman-polygon-clipping.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/sutherland-hodgman-polygon-clipping.md
@@ -8,7 +8,7 @@ dashedName: sutherland-hodgman-polygon-clipping
 
 # --description--
 
-The Sutherland-Hodgman clipping algorithm finds the polygon that is the intersection between an arbitrary polygon (the "subject polygon") and a convex polygon (the "clip polygon"). It is used in computer graphics (especially 2D graphics) to reduce the complexity of a scene being displayed by eliminating parts of a polygon that do not need to be displayed. Take the closed polygon defined by the points:
+O algoritmo de recorte de polígonos de Sutherland-Hodgman encontra o polígono que é a intersecção entre um polígono arbitrário (o "polígono sujeito") e um polígono convexo (o "polígono de recorte"). Ele é usado em gráficos de computador (especialmente gráficos 2D) para reduzir a complexidade de uma cena que está sendo exibida eliminando partes de um polígono que não precisam ser exibidas. Pegue o polígono que se fecha definido pelos pontos:
 
 <pre>[(50, 150), (200, 50), (350, 150), (350, 300), (250, 300), (200, 250), (150, 350), (100, 250), (100, 200)]</pre>
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/symmetric-difference.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/symmetric-difference.md
index 366fcb12c16..f71e4ca3baf 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/symmetric-difference.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/symmetric-difference.md
@@ -8,7 +8,7 @@ dashedName: symmetric-difference
 
 # --description--
 
-Given two sets *A* and *B*, compute $(A \\setminus B) \\cup (B \\setminus A).$ That is, enumerate the items that are in *A* or *B* but not both. This set is called the symmetric difference of *A* and *B*. In other words: $(A \\cup B) \\setminus (A \\cap B)$ (the set of items that are in at least one of *A* or *B* minus the set of items that are in both *A* and *B*).
+Dados dois conjuntos *A* e *B*, calcule $(A \\setminus B) \\cup (B \\setminus A). Ou seja, enumere os itens que estão em *A* ou *B* mas não em ambos. Este conjunto é chamado da diferença simétrica de *A* e *B*. Em outras palavras: $(A \\cup B) \\setminus (A \\cap B)$ (o conjunto de itens que estão em pelo menos um dos conjuntos, *A* ou *B*, menos o conjunto de itens que estão em ambos, *A* e *B*).
 
 Exemplo:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/taxicab-numbers.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/taxicab-numbers.md
index 3394da054f1..2db5422631d 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/taxicab-numbers.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/taxicab-numbers.md
@@ -8,7 +8,7 @@ dashedName: taxicab-numbers
 
 # --description--
 
-A taxicab number (the definition that is being used here) is a positive integer that can be expressed as the sum of two positive cubes in more than one way.
+Um número de taxicab (a definição que será usada aqui) é um número inteiro positivo que pode ser expresso como a soma de dois cubos positivos de mais de uma maneira.
 
 O primeiro número taxicab é `1729`, que é:
 
@@ -19,7 +19,7 @@ O primeiro número taxicab é `1729`, que é:
 Os números taxicab também são conhecidos como:
 
 <ul>
-  <li>taxi numbers</li>
+  <li>números taxi</li>
   <li>números taxi-cab</li>
   <li>números taxi cab</li>
   <li>Números de Hardy-Ramanujan</li>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/tokenize-a-string-with-escaping.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/tokenize-a-string-with-escaping.md
index cb4ff14cf65..0e9eee55341 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/tokenize-a-string-with-escaping.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/tokenize-a-string-with-escaping.md
@@ -8,14 +8,14 @@ dashedName: tokenize-a-string-with-escaping
 
 # --description--
 
-Write a function or program that can split a string at each non-escaped occurrence of a separator character.
+Escreva uma função ou programa que possa dividir uma string em cada ocorrência sem escape de um caractere separador.
 
 Ela deve aceitar três parâmetros de entrada:
 
 <ul>
-  <li>The <strong>string</strong></li>
-  <li>The <strong>separator character</strong></li>
-  <li>The <strong>escape character</strong></li>
+  <li>A <strong>string</strong></li>
+  <li>O <strong>caractere separador</strong></li>
+  <li>O <strong>caractere de escape</strong></li>
 </ul>
 
 Ela deve ter como saída uma lista de strings.
@@ -23,14 +23,14 @@ Ela deve ter como saída uma lista de strings.
 Regras para a divisão:
 
 <ul>
-  <li>The fields that were separated by the separators, become the elements of the output list.</li>
+  <li>Os campos que foram separados pelos separadores se tornam os elementos da lista de saída.</li>
   <li>Campos vazios devem ser preservados, mesmo no início e no fim.</li>
 </ul>
 
 Regras para o escape:
 
 <ul>
-  <li>"Escaped" means preceded by an occurrence of the escape character that is not already escaped itself.</li>
+  <li>Com "escape" significa precedido por uma ocorrência do caractere de escape, que já não estiver escapado por si mesmo.</li>
   <li>Quando o caractere de escape preceder um caractere que não tem nenhum significado especial, ele ainda conta como um escape (mas não faz nada especial).</li>
   <li>Cada ocorrência do caractere de escape que for usada para fazer o escape de algo não deve se tornar parte do resultado.</li>
 </ul>
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/top-rank-per-group.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/top-rank-per-group.md
index ac5631f3f5e..62259a9b952 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/top-rank-per-group.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/top-rank-per-group.md
@@ -8,7 +8,7 @@ dashedName: top-rank-per-group
 
 # --description--
 
-Find the top `n` ranked data in each group, where `n` is provided as a parameter. Name of the rank and the group are also provided as parameter.
+Encontre os melhores `n` dados classificados em cada grupo, onde `n` é fornecido como um parâmetro. O nome da classificação e o grupo também são fornecidos como parâmetro.
 
 Considerando os dados a seguir:
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/topological-sort.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/topological-sort.md
index 2b6992fe3a8..ceaeacc6ede 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/topological-sort.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/topological-sort.md
@@ -8,13 +8,13 @@ dashedName: topological-sort
 
 # --description--
 
-Given a mapping between items, and items they depend on, a topological sort orders items so that no item precedes an item it depends upon. There are two popular algorithms for topological sorting: Kahn's (1962) topological sort and depth-first search.
+Dado um mapeamento entre itens e itens dos quais eles dependem, uma ordenação topológica de itens faz com que nenhum item preceda um item do qual ele depende. Existem dois algoritmos populares para a ordenação topológica: a ordenação topológica de Kahn (1962) e a busca profunda.
 
 # --instructions--
 
 Escreva uma função que retorne uma lista com ordem de compilação válida de bibliotecas a partir de suas dependências.
 
-- Assume library names are single words.
+- Assuma que os nomes das bibliotecas são palavras únicas.
 - Itens mencionados apenas como dependentes não têm dependentes próprios, mas sua ordem de compilação deve ser dada.
 - Quaisquer autodependências devem ser ignoradas.
 - Quaisquer dependências não ordenáveis devem ser ignoradas.
@@ -22,8 +22,8 @@ Escreva uma função que retorne uma lista com ordem de compilação válida de
 Use os seguintes dados como exemplo:
 
 <pre>
-LIBRARY          LIBRARY DEPENDENCIES
-=======          ====================
+BIBLIOTECA       DEPENDÊNCIAS
+==========       ====================
 des_system_lib   std synopsys std_cell_lib des_system_lib dw02 dw01 ramlib ieee
 dw01             ieee dw01 dware gtech
 dw02             ieee dw02 dware
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/towers-of-hanoi.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/towers-of-hanoi.md
index 6af56a53c4c..6823c32d13f 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/towers-of-hanoi.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/towers-of-hanoi.md
@@ -8,7 +8,7 @@ dashedName: towers-of-hanoi
 
 # --description--
 
-Solve the Towers of Hanoi problem. The number of objects will be given as the first parameter, followed by the strings used to identify each stack of objects. Create a nested array containing the list of moves, `["source", "destination"]`.
+Resolva o problema das Torres de Hanói. O número de objetos será dado como o primeiro parâmetro, seguido pelas strings usadas para identificar cada pilha de objetos. Crie um array aninhado contendo a lista de movimentos, `["source", "destination"]`.
 
 Por exemplo, os parâmetros `(4, 'A', 'B', 'C')` resultarão em um array aninhado de movimentos `[['A', 'C'], ['B', 'A']]`, indicando que o primeiro movimento foi mover um objeto da pilha `A` para a `C` e o segundo movimento foi mover um objeto da pilha `B` para a `A`.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/vector-cross-product.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/vector-cross-product.md
index 7970037eea8..208cbf4fc4c 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/vector-cross-product.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/vector-cross-product.md
@@ -8,7 +8,7 @@ dashedName: vector-cross-product
 
 # --description--
 
-A vector is defined as having three dimensions as being represented by an ordered collection of three numbers: (X, Y, Z).
+Um vetor é definido como tendo três dimensões e sendo representado por uma coleção ordenada de três números: (X, Y, Z).
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/vector-dot-product.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/vector-dot-product.md
index c1ae8c82c86..b70bdfd000e 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/vector-dot-product.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/vector-dot-product.md
@@ -8,7 +8,7 @@ dashedName: vector-dot-product
 
 # --description--
 
-A vector can have one or more values represented by an ordered collection. Examples could be (x), (x, y), or (x, y, z).
+Um vetor pode ter um ou mais valores representados por uma coleção ordenada. Exemplos podem ser (x), (x, y), ou (x, y, z).
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/word-frequency.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/word-frequency.md
index d4ec8e92a53..d5a26805b9f 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/word-frequency.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/word-frequency.md
@@ -8,7 +8,7 @@ dashedName: word-frequency
 
 # --description--
 
-Given a text string and an integer n, return the n most common words in the file (and the number of their occurrences) in decreasing frequency.
+Dados uma string e um número inteiro n, retorne as n palavras mais comuns no arquivo (e o número de ocorrências de cada uma) em frequência decrescente.
 
 # --instructions--
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/word-wrap.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/word-wrap.md
index 34f21da7907..b9096ca9ecc 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/word-wrap.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/word-wrap.md
@@ -8,17 +8,16 @@ dashedName: word-wrap
 
 # --description--
 
-Even today, with proportional fonts and complex layouts, there are still cases where you need to wrap text at a specified column. The basic task is to wrap a paragraph of text in a simple way.
+Mesmo hoje, com fontes proporcionais e layouts complexos, ainda há casos em que você precisa quebrar o texto em uma determinada coluna. A tarefa básica é quebrar um parágrafo de um texto de uma forma simples.
 
 # --instructions--
 
 Escreva uma função que possa quebrar este texto para qualquer número de caracteres. Como exemplo, o texto quebrado com 80 caracteres deve se parecer com o seguinte:
 
 <pre>
-Wrap text using a more sophisticated algorithm such as the Knuth and Plass TeX
-algorithm. If your language provides this, you get easy extra credit, but you
-must reference documentation indicating that the algorithm is something better
-than a simple minimum length algorithm.
+Quebre o texto usando um algoritmo mais sofisticado, como o algoritmo de Knuth e Plass TeX. Se o seu idioma fornece isso, você obtém crédito extra fácil, mas você
+deve fazer referência à documentação que indica que o algoritmo é algo melhor
+do que um simples algoritmo de comprimento mínimo.
 </pre>
 
 # --hints--
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/y-combinator.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/y-combinator.md
index 515ce8580da..fe4982caabd 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/y-combinator.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/y-combinator.md
@@ -8,7 +8,7 @@ dashedName: y-combinator
 
 # --description--
 
-In strict <a href="https://www.freecodecamp.org/news/the-principles-of-functional-programming/" target="_blank" rel="noopener noreferrer nofollow">functional programming</a> and the lambda calculus, functions (lambda expressions) don't have state and are only allowed to refer to arguments of enclosing functions. This rules out the usual definition of a recursive function wherein a function is associated with the state of a variable and this variable's state is used in the body of the function.
+Em <a href="https://www.freecodecamp.org/news/the-principles-of-functional-programming/" target="_blank" rel="noopener noreferrer nofollow">programação funcional</a> estrita e em cálculo de lambda, as funções (expressões lambda) não têm estado e é permitido apenas se referir a argumentos de funções encapsuladas. Isso exclui a definição habitual de uma função recursiva, na qual uma função é associada ao estado de uma variável e o estado dessa variável é usado no corpo da função.
 
 O combinador Y é uma função sem estado que, ao ser aplicada a outra função sem estado, retorna uma versão recursiva da função. O combinador Y é a classe mais simples de tais funções, chamadas de combinadores de pontos fixos.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/zeckendorf-number-representation.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/zeckendorf-number-representation.md
index d2ad0acb02a..fd9ca9dc4ff 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/zeckendorf-number-representation.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/zeckendorf-number-representation.md
@@ -8,7 +8,7 @@ dashedName: zeckendorf-number-representation
 
 # --description--
 
-Just as numbers can be represented in a positional notation as sums of multiples of the powers of ten (decimal) or two (binary); all the positive integers can be represented as the sum of one or zero times the distinct members of the Fibonacci series. Recall that the first six distinct Fibonacci numbers are: `1, 2, 3, 5, 8, 13`.
+Assim como os números podem ser representados em uma notação posicional como somas de múltiplos das potências de dez (decimal) ou de dois (binário), todos os números inteiros positivos podem ser representados como a soma de um ou zero vezes os diferentes membros da série Fibonacci. Lembre-se de que os primeiros seis números de Fibonacci distintos são: `1, 2, 3, 5, 8, 13`.
 
 O número decimal onze pode ser escrito como `0*13 + 1*8 + 0*5 + 1*3 + 0*2 + 0*1` ou `010100` na notação posicional, onde as colunas representam a multiplicação por um determinado membro da sequência. Zeros à esquerda são descartados para que o número 11 decimal se torne `10100`. Porém, 10100 não é a única maneira de representar 11 nos números de Fibonacci. `0*13 + 1*8 + 0*5 + 0*3 + 1*2 + 1*1` ou 010011 também representaria o 11 decimal. Para um número de Zeckendorf verdadeiro, há a restrição adicional de que *não sejam usados dois números de Fibonacci consecutivos*, o que leva à antiga solução única.
 
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/zhang-suen-thinning-algorithm.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/zhang-suen-thinning-algorithm.md
index 6f50b0beb06..e6847c0b939 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/zhang-suen-thinning-algorithm.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/zhang-suen-thinning-algorithm.md
@@ -8,7 +8,7 @@ dashedName: zhang-suen-thinning-algorithm
 
 # --description--
 
-This is an algorithm used to thin a black and white i.e. one bit per pixel images. For example, with an input image of:
+Este é um algoritmo usado para afinar imagens em preto e branco, ou seja, imagens de um bit por pixel. Por exemplo, com uma imagem de entrada de:
 
 ```js
 const testImage1 = [
@@ -40,7 +40,7 @@ Ele produz a saída fina:
   '                               ' ];
 ```
 
-## Algorithm
+## Algoritmo
 
 Suponha que os pixels pretos são um e os pixels brancos são zeros. Leve em conta também que a imagem de entrada é um array retangular, de N por M, de uns e zeros. O algoritmo opera em todos os pixels pretos P1 que podem ter oito vizinhos. Os vizinhos estão, por ordem, organizados como:
 
@@ -48,18 +48,18 @@ $$\begin{array}{|c|c|c|} \\hline P9 & P2              & P3\\\\ \\hline P8 & \bol
 
 Obviamente que os pixels da borda da imagem não podem ter todos os oito vizinhos.
 
-- Define $A(P1)$ = the number of transitions from white to black, ($0 \to 1$) in the sequence P2, P3, P4, P5, P6, P7, P8, P9, P2. (Note the extra P2 at the end - it is circular).
+- Defina $A(P1)$ = o número de transições de branco para preto, ($0 \to 1$) na sequência P2, P3, P4, P5, P6, P7, P8, P9, P2. (Observe o P2 adicional no final - é circular).
 - Defina $B(P1)$ = o número de vizinhos de P1 que são pixels pretos. ($= \\sum(P2 \ldots P9)$)
 
 **Passo 1:**
 
 Todos os pixels são testados e pixels satisfazendo todas as seguintes condições (simultaneamente) são apenas anotados nesta fase.
 
-1. The pixel is black and has eight neighbours
+1. O pixel é preto e tem oito vizinhos
 2. $2 \le B(P1) \le 6$
 3. $A(P1) = 1$
-4. At least one of $P2$, $P4$ and $P6$ is white
-5. At least one of $P4$, $P6$ and $P8$ is white
+4. Pelo menos um dos pixels, entre $P2$, $P4$ e $P6$, é branco
+5. Pelo menos um dos pixels, entre $P4$, $P6$ e $P8$, é branco
 
 Depois de iterar sobre a imagem e coletar todos os pixels satisfazendo todas as condições do passo 1, todos estes pixels que satisfazem as condições são definidos como brancos.
 
@@ -67,7 +67,7 @@ Depois de iterar sobre a imagem e coletar todos os pixels satisfazendo todas as
 
 Todos os pixels são testados novamente e pixels satisfazendo todas as seguintes condições (simultaneamente) são apenas anotados nesta fase.
 
-1. The pixel is black and has eight neighbours
+1. O pixel é preto e tem oito vizinhos
 2. $2 \le B(P1) \le 6$
 3. $A(P1) = 1$
 4. Pelo menos um dos pixels, entre $P2$, $P4$ e $P8$, é branco
diff --git a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/zig-zag-matrix.md b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/zig-zag-matrix.md
index 643cd2a0da7..5491d32cfbe 100644
--- a/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/zig-zag-matrix.md
+++ b/curriculum/challenges/portuguese/22-rosetta-code/rosetta-code-challenges/zig-zag-matrix.md
@@ -8,7 +8,7 @@ dashedName: zig-zag-matrix
 
 # --description--
 
-A 'zig-zag' array is a square arrangement of the first $N^2$ integers, where the numbers increase sequentially as you zig-zag along the array's anti-diagonals.
+Uma matriz 'zig-zag' é um arranjo quadrado dos primeiros $N^2$ inteiros, onde os números crescem sequencialmente à medida que você percorre em zigue-zague ao longo das antidiagonais da matriz.
 
 Por exemplo, para a entrada `5`, o seguinte resultado deve ser produzido:
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/build-your-own-functions.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/build-your-own-functions.md
index 7c2b25838dd..4937c77c6f7 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/build-your-own-functions.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/build-your-own-functions.md
@@ -12,7 +12,7 @@ dashedName: build-your-own-functions
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://www.youtube.com/watch?v=ksvGhDsjtpw" target="_blank" rel="noopener noreferrer nofollow">Exercício</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/comparing-and-sorting-tuples.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/comparing-and-sorting-tuples.md
index 711f9441f28..0956044bad3 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/comparing-and-sorting-tuples.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/comparing-and-sorting-tuples.md
@@ -12,7 +12,7 @@ dashedName: comparing-and-sorting-tuples
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://www.youtube.com/watch?v=EhQxwzyT16E" target="_blank" rel="noopener noreferrer nofollow">Exercício</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/conditional-execution.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/conditional-execution.md
index 5b4f9eb48aa..0d3189cf9a5 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/conditional-execution.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/conditional-execution.md
@@ -14,7 +14,7 @@ dashedName: conditional-execution
 
 ## --text--
 
-Which code is indented correctly to print "Yes" if x = 0 and y = 10?
+Qual código está indentado corretamente para imprimir "Yes" se x = 0 e y = 10?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/data-visualization-mailing-lists.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/data-visualization-mailing-lists.md
index 1c2b5a98910..6337d75c6c3 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/data-visualization-mailing-lists.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/data-visualization-mailing-lists.md
@@ -12,7 +12,7 @@ dashedName: data-visualization-mailing-lists
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://www.youtube.com/watch?v=KfhslNzopxo" target="_blank" rel="noopener noreferrer nofollow">Exercício: Geodata</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/data-visualization-page-rank.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/data-visualization-page-rank.md
index 8da7c38763e..c7f15388522 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/data-visualization-page-rank.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/data-visualization-page-rank.md
@@ -14,7 +14,7 @@ dashedName: data-visualization-page-rank
 
 ## --text--
 
-How does the PageRank algorithm work?
+Como funciona o algoritmo da PageRank?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/dictionaries-and-loops.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/dictionaries-and-loops.md
index 2c8d661d3d6..ad9cdb45d63 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/dictionaries-and-loops.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/dictionaries-and-loops.md
@@ -12,7 +12,7 @@ dashedName: dictionaries-and-loops
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://www.youtube.com/watch?v=PrhZ9qwBDD8" target="_blank" rel="noopener noreferrer nofollow">Exercício</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/dictionaries-common-applications.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/dictionaries-common-applications.md
index 5719c1a3587..6801de05150 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/dictionaries-common-applications.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/dictionaries-common-applications.md
@@ -14,7 +14,7 @@ dashedName: dictionaries-common-applications
 
 ## --text--
 
-What will the following code print?
+O que será impresso pelo código a seguir?
 
 ```python
 counts = { 'quincy' : 1 , 'mrugesh' : 42, 'beau': 100, '0': 10}
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/files-as-a-sequence.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/files-as-a-sequence.md
index 706e6a4f0e7..e794373ad64 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/files-as-a-sequence.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/files-as-a-sequence.md
@@ -12,7 +12,7 @@ dashedName: files-as-a-sequence
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://www.youtube.com/watch?v=il1j4wkte2E" target="_blank" rel="noopener noreferrer nofollow">Exercício</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/intermediate-expressions.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/intermediate-expressions.md
index c80a09b97a9..111e589c94e 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/intermediate-expressions.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/intermediate-expressions.md
@@ -12,7 +12,7 @@ dashedName: intermediate-expressions
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://youtu.be/t_4DPwsaGDY" target="_blank" rel="noopener noreferrer nofollow">Exercício 1</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/intermediate-strings.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/intermediate-strings.md
index e8f73647d93..7cd2c676b39 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/intermediate-strings.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/intermediate-strings.md
@@ -12,7 +12,7 @@ dashedName: intermediate-strings
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://www.youtube.com/watch?v=1bSqHot-KwE" target="_blank" rel="noopener noreferrer nofollow">Exercício</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-elements-of-python.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-elements-of-python.md
index 4e9c6eeb500..4bd40e098e1 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-elements-of-python.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-elements-of-python.md
@@ -14,7 +14,7 @@ dashedName: introduction-elements-of-python
 
 ## --text--
 
-What will the following program print out:
+Qual será a impressão do seguinte programa em Python:
 
 ```python
 x = 43
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-hardware-achitecture.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-hardware-achitecture.md
index 1c9c7cb6693..ff9a3504362 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-hardware-achitecture.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-hardware-achitecture.md
@@ -14,7 +14,7 @@ dashedName: introduction-hardware-architecture
 
 ## --text--
 
-Where are your programs stored when they are running?
+Onde seus programas são armazenados quando estão sendo executados?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-python-as-a-language.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-python-as-a-language.md
index 73a6035bfa9..1c3b36c72c3 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-python-as-a-language.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-python-as-a-language.md
@@ -14,7 +14,7 @@ dashedName: introduction-python-as-a-language
 
 ## --text--
 
-What will print out after running these two lines of code:
+O que será impresso após a execução destas duas linhas de código:
 
 ```python
 x = 6
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-why-program.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-why-program.md
index 71197b6f915..7d2f810bc5b 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-why-program.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/introduction-why-program.md
@@ -16,7 +16,7 @@ dashedName: introduction-why-program
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://youtu.be/F7mtLrYzZP8" target="_blank" rel="noopener noreferrer nofollow">Instale Python no Windows</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/iterations-definite-loops.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/iterations-definite-loops.md
index 169761a6f34..722fc25665e 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/iterations-definite-loops.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/iterations-definite-loops.md
@@ -14,7 +14,7 @@ dashedName: iterations-definite-loops
 
 ## --text--
 
-How many lines will the following code print?:
+Quantas linhas serão impressas pelo seguinte código?:
 
 ```python
 for i in [2,1,5]:
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/iterations-loop-idioms.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/iterations-loop-idioms.md
index 9e1b904449c..7211b0d70d6 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/iterations-loop-idioms.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/iterations-loop-idioms.md
@@ -14,7 +14,7 @@ dashedName: iterations-loop-idioms
 
 ## --text--
 
-Below is code to find the smallest value from a list of values. One line has an error that will cause the code to not work as expected. Which line is it?:
+Abaixo está o código para encontrar o menor valor de uma lista de valores. Uma linha tem um erro que fará com que o código não funcione como esperado. Qual é a linha?:
 
 ```python
 smallest = None
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/iterations-more-patterns.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/iterations-more-patterns.md
index 195b5050581..490dfa110b4 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/iterations-more-patterns.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/iterations-more-patterns.md
@@ -12,7 +12,7 @@ dashedName: iterations-more-patterns
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://www.youtube.com/watch?v=kjxXZQw0uPg" target="_blank" rel="noopener noreferrer nofollow">Exercício</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/loops-and-iterations.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/loops-and-iterations.md
index 7b1e264cce7..4e335158c19 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/loops-and-iterations.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/loops-and-iterations.md
@@ -14,7 +14,7 @@ dashedName: loops-and-iterations
 
 ## --text--
 
-What will the following code print out?:
+O que será impresso pelo código a seguir?:
 
 ```python
 n = 0
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/make-a-relational-database.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/make-a-relational-database.md
index e439aa19111..f5d2d3efdd7 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/make-a-relational-database.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/make-a-relational-database.md
@@ -14,7 +14,7 @@ dashedName: make-a-relational-database
 
 ## --text--
 
-What SQL command would you use to retrieve all users that have the email address `quincy@freecodecamp.org`?
+Qual comando SQL você usaria para recuperar todos os usuários que têm o endereço de e-mail `quincy@freecodecamp.org`?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/more-conditional-structures.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/more-conditional-structures.md
index ff6828a5408..bc48867fb23 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/more-conditional-structures.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/more-conditional-structures.md
@@ -12,7 +12,7 @@ dashedName: more-conditional-structures
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://www.youtube.com/watch?v=crLerB4ZxMI" target="_blank" rel="noopener noreferrer nofollow">Exercício 1</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-protocol.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-protocol.md
index 900c81ee23f..396df8b520c 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-protocol.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-protocol.md
@@ -14,7 +14,7 @@ dashedName: networking-protocol
 
 ## --text--
 
-What type of HTTP request is usually used to access a website?
+Que tipo de requisição HTTP é geralmente usada para acessar um site?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-text-processing.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-text-processing.md
index 2618b67a57b..ed6ad926380 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-text-processing.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-text-processing.md
@@ -14,7 +14,7 @@ dashedName: networking-text-processing
 
 ## --text--
 
-Which type of encoding do most websites use?
+Que tipo de codificação a maioria dos sites usa?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-using-urllib-in-python.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-using-urllib-in-python.md
index 0080a40300e..13429576d64 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-using-urllib-in-python.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-using-urllib-in-python.md
@@ -14,7 +14,7 @@ dashedName: networking-using-urllib-in-python
 
 ## --text--
 
-What will the output of the following code be like?:
+Como será a saída do seguinte código?:
 
 ```python
 import urllib.request
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-web-scraping-with-python.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-web-scraping-with-python.md
index 78e8ee05468..67c32f6924b 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-web-scraping-with-python.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-web-scraping-with-python.md
@@ -12,7 +12,7 @@ dashedName: networking-web-scraping-with-python
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://www.youtube.com/watch?v=dWLdI143W-g" target="_blank" rel="noopener noreferrer nofollow">Exercício: socket1</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-with-python.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-with-python.md
index e1ee83047b1..8874c931480 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-with-python.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-with-python.md
@@ -14,7 +14,7 @@ dashedName: networking-with-python
 
 ## --text--
 
-What Python library gives access to TCP Sockets?
+Qual biblioteca Python dá acesso a soquetes TCP?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-write-a-web-browser.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-write-a-web-browser.md
index 15ba9ca6068..3999210e17f 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-write-a-web-browser.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/networking-write-a-web-browser.md
@@ -14,7 +14,7 @@ dashedName: networking-write-a-web-browser
 
 ## --text--
 
-What does the following code create?:
+O que será criado pelo código abaixo?
 
 ```py
 import socket
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/object-lifecycle.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/object-lifecycle.md
index d5b35adf222..9d4ad5bfc10 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/object-lifecycle.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/object-lifecycle.md
@@ -14,7 +14,7 @@ dashedName: object-lifecycle
 
 ## --text--
 
-What will the following program print?:
+O que será impresso pelo código a seguir?
 
 ```python
 class PartyAnimal:
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/objects-a-sample-class.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/objects-a-sample-class.md
index 35f2555478c..ee6be841907 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/objects-a-sample-class.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/objects-a-sample-class.md
@@ -14,7 +14,7 @@ dashedName: objects-a-sample-class
 
 ## --text--
 
-What will the following program print?:
+O que será impresso pelo código a seguir?:
 
 ```python
 class PartyAnimal:
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/objects-inheritance.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/objects-inheritance.md
index f622ccadbc7..009d27779db 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/objects-inheritance.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/objects-inheritance.md
@@ -14,7 +14,7 @@ dashedName: objects-inheritance
 
 ## --text--
 
-What is inheritance in object-oriented programming?
+O que é herança na programação orientada para objetos?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-dictionaries.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-dictionaries.md
index ce4fd75f02e..40d104e5149 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-dictionaries.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-dictionaries.md
@@ -14,7 +14,7 @@ dashedName: python-dictionaries
 
 ## --text--
 
-What does dict equal after running this code?:
+Qual será o valor de dict após executar este código?:
 
 ```python
 dict = {"Fri": 20, "Thu": 6, "Sat": 1}
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-functions.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-functions.md
index 9be7dc636cb..21f66d358d5 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-functions.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-functions.md
@@ -14,7 +14,7 @@ dashedName: python-functions
 
 ## --text--
 
-What is the purpose of the "def" keyword in Python?
+Qual é a finalidade da palavra-chave "def" em Python?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-lists.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-lists.md
index 744e78d5452..2779ab5c82f 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-lists.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-lists.md
@@ -14,7 +14,7 @@ dashedName: python-lists
 
 ## --text--
 
-What is the value of x after running this code:
+Qual é o valor x após a execução deste código:
 
 ```python
 fruit = "banana"
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-objects.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-objects.md
index 23e414a9963..2ce81c0f3e9 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-objects.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/python-objects.md
@@ -14,7 +14,7 @@ dashedName: python-objects
 
 ## --text--
 
-Which is NOT true about objects in Python?
+Qual das alternativas NÃO é verdadeira sobre objetos no Python?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/reading-files.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/reading-files.md
index 6959c4d181c..735834279e4 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/reading-files.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/reading-files.md
@@ -14,7 +14,7 @@ dashedName: reading-files
 
 ## --text--
 
-What is used to indicate a new line in a string?
+O que é usado para indicar uma nova linha em uma string?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/regular-expressions-matching-and-extracting-data.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/regular-expressions-matching-and-extracting-data.md
index d05c2df6ea1..20c2232c16b 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/regular-expressions-matching-and-extracting-data.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/regular-expressions-matching-and-extracting-data.md
@@ -14,7 +14,7 @@ dashedName: regular-expressions-matching-and-extracting-data
 
 ## --text--
 
-What will the following program print?:
+O que será impresso pelo código a seguir?:
 
 ```python
 import re
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/regular-expressions-practical-applications.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/regular-expressions-practical-applications.md
index 5f1cdb3b0ac..bb75e39893c 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/regular-expressions-practical-applications.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/regular-expressions-practical-applications.md
@@ -14,7 +14,7 @@ dashedName: regular-expressions-practical-applications
 
 ## --text--
 
-What will search for a "$" in a regular expression?
+O que o "$" vai procurar em uma expressão regular?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/regular-expressions.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/regular-expressions.md
index ff3878437fc..7d87d0d95d9 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/regular-expressions.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/regular-expressions.md
@@ -14,7 +14,7 @@ dashedName: regular-expressions
 
 ## --text--
 
-Which regex matches only a white space character?
+Qual regex corresponde apenas a um caractere de espaço em branco?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-database-design.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-database-design.md
index 006b24fe657..11a6691f775 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-database-design.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-database-design.md
@@ -14,7 +14,7 @@ dashedName: relational-database-design
 
 ## --text--
 
-What is the best practice for how many times a piece of string data should be stored in a database?
+Qual é a prática recomendada com relação ao número de vezes que um dado do tipo string pode ser armazenado em um banco de dados?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-and-sqlite.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-and-sqlite.md
index 0153e099e6c..e1ba4642d45 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-and-sqlite.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-and-sqlite.md
@@ -12,9 +12,9 @@ dashedName: relational-databases-and-sqlite
 
 # --description--
 
-<a href="https://www.sqlite.org/download.html" target="_blank" rel="noopener noreferrer nofollow">Download SQLite</a>
-<a href="https://sqlitebrowser.org/dl/" target="_blank" rel="noopener noreferrer nofollow">Download DB Browser for SQLite</a>
-<a href="https://www.sqlite.org/famous.html" target="_blank" rel="noopener noreferrer nofollow">SQLite usage</a>
+<a href="https://www.sqlite.org/download.html" target="_blank" rel="noopener noreferrer nofollow">Download do SQLite</a>
+<a href="https://sqlitebrowser.org/dl/" target="_blank" rel="noopener noreferrer nofollow">Download do DB Browser for SQLite</a>
+<a href="https://www.sqlite.org/famous.html" target="_blank" rel="noopener noreferrer nofollow">Uso do SQLite</a>
 
 # --question--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-join-operation.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-join-operation.md
index d225625da56..ad4c70b024a 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-join-operation.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-join-operation.md
@@ -14,7 +14,7 @@ dashedName: relational-databases-join-operation
 
 ## --text--
 
-When using a JOIN clause in an SQL statement, what does ON do?
+Ao usar uma instrução JOIN em uma declaração do SQL, o que faz o ON?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-many-to-many-relationships.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-many-to-many-relationships.md
index f7a272464ee..6918b08d3f2 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-many-to-many-relationships.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-many-to-many-relationships.md
@@ -12,7 +12,7 @@ dashedName: relational-databases-many-to-many-relationships
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://www.youtube.com/watch?v=uQ3Qv1z_Vao" target="_blank" rel="noopener noreferrer nofollow">Exercício: e-mail</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-relationship-building.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-relationship-building.md
index c7ea88b558b..57969abed85 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-relationship-building.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/relational-databases-relationship-building.md
@@ -14,7 +14,7 @@ dashedName: relational-databases-relationship-building
 
 ## --text--
 
-What does the INSERT command do in SQL?
+O que o comando INSERT faz em SQL?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/representing-relationships-in-a-relational-database.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/representing-relationships-in-a-relational-database.md
index 7d611499bf6..b5fb69e6af4 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/representing-relationships-in-a-relational-database.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/representing-relationships-in-a-relational-database.md
@@ -14,7 +14,7 @@ dashedName: representing-relationships-in-a-relational-database
 
 ## --text--
 
-What is a foreign key?
+O que é uma chave estrangeira?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/strings-and-lists.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/strings-and-lists.md
index 8dbd0ae62bb..80031b46036 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/strings-and-lists.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/strings-and-lists.md
@@ -12,7 +12,7 @@ dashedName: strings-and-lists
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://www.youtube.com/watch?v=-9TfJF2dwHI" target="_blank" rel="noopener noreferrer nofollow">Exercício</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/strings-in-python.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/strings-in-python.md
index b8c869ab190..0581b50bc35 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/strings-in-python.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/strings-in-python.md
@@ -14,7 +14,7 @@ dashedName: strings-in-python
 
 ## --text--
 
-What will the following code print?:
+O que será impresso pelo código a seguir?
 
 ```python
 for n in "banana":
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/the-tuples-collection.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/the-tuples-collection.md
index 7ce07e4b846..136dc496981 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/the-tuples-collection.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/the-tuples-collection.md
@@ -14,7 +14,7 @@ dashedName: the-tuples-collection
 
 ## --text--
 
-What will the following code print?:
+O que será impresso pelo código a seguir?:
 
 ```python
 d = dict()
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/using-web-services.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/using-web-services.md
index 482ac124f2e..9a3b2316baf 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/using-web-services.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/using-web-services.md
@@ -14,7 +14,7 @@ dashedName: using-web-services
 
 ## --text--
 
-What are the two most common ways to send data over the internet?
+Quais são as duas formas mais comuns de enviar dados pela internet?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/variables-expressions-and-statements.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/variables-expressions-and-statements.md
index d190d239b9d..ef6b05f4a9a 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/variables-expressions-and-statements.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/variables-expressions-and-statements.md
@@ -14,7 +14,7 @@ dashedName: variables-expressions-and-statements
 
 ## --text--
 
-What is the symbol used in an assignment statement?
+Qual é o símbolo usado em uma instrução da atribuição?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/visualizing-data-with-python.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/visualizing-data-with-python.md
index 1bdaf739723..5ada7950e73 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/visualizing-data-with-python.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/visualizing-data-with-python.md
@@ -14,7 +14,7 @@ dashedName: visualizing-data-with-python
 
 ## --text--
 
-Most data needs to be \_\_\_\_\_\_ before using it.
+A maior parte dos dados precisa ser \_\_\_\_\_\_ antes de ser usada.
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-api-rate-limiting-and-security.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-api-rate-limiting-and-security.md
index 0fa5eee1fb9..bef762eb58c 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-api-rate-limiting-and-security.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-api-rate-limiting-and-security.md
@@ -12,7 +12,7 @@ dashedName: web-services-api-rate-limiting-and-security
 
 # --description--
 
-More resources:
+Mais recursos:
 
 \- <a href="https://www.youtube.com/watch?v=TJGJN0T8tak" target="_blank" rel="noopener noreferrer nofollow">Exercício: GeoJSON</a>
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-apis.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-apis.md
index 6aa04a2c336..83d46b976e1 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-apis.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-apis.md
@@ -14,7 +14,7 @@ dashedName: web-services-apis
 
 ## --text--
 
-What does API stand for?
+O que significa API?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-json.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-json.md
index 96eaa2f3dd6..d653f144da5 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-json.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-json.md
@@ -14,7 +14,7 @@ dashedName: web-services-json
 
 ## --text--
 
-What will the following code print?:
+O que será impresso pelo código a seguir?:
 
 ```python
 import json
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-service-oriented-approach.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-service-oriented-approach.md
index 2e44e583ffb..d991db14e9e 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-service-oriented-approach.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-service-oriented-approach.md
@@ -14,7 +14,7 @@ dashedName: web-services-service-oriented-approach
 
 ## --text--
 
-With a services oriented approach to developing web apps, where is the data located?
+Com uma abordagem orientada a serviços para o desenvolvimento de aplicativos da web, onde os dados estarão localizados?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-xml-schema.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-xml-schema.md
index 2b0d1efed7a..0965b67e173 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-xml-schema.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-xml-schema.md
@@ -14,7 +14,7 @@ dashedName: web-services-xml-schema
 
 ## --text--
 
-What is XSD?
+O que é XSD?
 
 ## --answers--
 
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-xml.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-xml.md
index 6da30b337fa..123b35dc2cf 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-xml.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/web-services-xml.md
@@ -14,7 +14,7 @@ dashedName: web-services-xml
 
 ## --text--
 
-What is wrong with the following XML?:
+O que há de errado com o XML a seguir?
 
 ```xml
 <person>
diff --git a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/working-with-lists.md b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/working-with-lists.md
index 5f990f09724..ab07ad82c14 100644
--- a/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/working-with-lists.md
+++ b/curriculum/challenges/portuguese/23-python-for-everybody/python-for-everybody/working-with-lists.md
@@ -14,7 +14,7 @@ dashedName: working-with-lists
 
 ## --text--
 
-Which method is used to add an item at the end of a list?
+Qual método é usado para adicionar um item no final de uma lista?
 
 ## --answers--
 
diff --git a/curriculum/challenges/swahili/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md b/curriculum/challenges/swahili/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
index 3eeb00f8bae..fd235501373 100644
--- a/curriculum/challenges/swahili/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
+++ b/curriculum/challenges/swahili/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
@@ -22,7 +22,8 @@ Complete the function using the rules below to modify the object passed to the f
 -   Your function must always return the entire `records` object.
 -   If `value` is an empty string, delete the given `prop` property from the album.
 -   If `prop` isn't `tracks` and `value` isn't an empty string, assign the `value` to that album's `prop`.
--   If `prop` is `tracks` and `value` isn't an empty string, you need to update the album's `tracks` array. First, if the album does not have a `tracks` property, assign it an empty array. Then add the `value` as the last item in the album's `tracks` array.
+-   If `prop` is `tracks` and `value` isn't an empty string, but the album doesn't have a `tracks` property, create an empty array and add `value` to it.
+-   If prop is `tracks` and `value` isn't an empty string, add `value` to the end of the album's existing `tracks` array.
 
 **Note:** A copy of the `recordCollection` object is used for the tests. You should not directly modify the `recordCollection` object.
 
diff --git a/curriculum/challenges/swahili/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md b/curriculum/challenges/swahili/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
index da9040a8c85..f5d76f3bbc1 100644
--- a/curriculum/challenges/swahili/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
+++ b/curriculum/challenges/swahili/06-quality-assurance/advanced-node-and-express/serialization-of-a-user-object.md
@@ -8,7 +8,7 @@ dashedName: serialization-of-a-user-object
 
 # --description--
 
-Serialization and deserialization are important concepts in regards to authentication. To serialize an object means to convert its contents into a small *key* that can then be deserialized into the original object. This is what allows us to know who has communicated with the server without having to send the authentication data, like the username and password, at each request for a new page.
+Serialization and deserialization are important concepts in regard to authentication. To serialize an object means to convert its contents into a small *key* that can then be deserialized into the original object. This is what allows us to know who has communicated with the server without having to send the authentication data, like the username and password, at each request for a new page.
 
 To set this up properly, you need to have a serialize function and a deserialize function. In Passport, these can be created with:
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
index b4e56ccaccd..a40e18beb1e 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
@@ -19,8 +19,8 @@ You should use the `append()` method to append `start` to `paths[start]`.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\.append\s*\(\s*start\s*\)/m));
+    const {function_body} = shortest;
+    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\s*\.append\s*\(\s*start\s*\)/m));
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
index 7bc2ab6a806..0c5dec196b1 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
@@ -27,8 +27,8 @@ You should call `extend()` on the neighbour node path passing the current node p
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
index 210470a4423..f8757ad0a51 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
@@ -16,8 +16,8 @@ You should append `node` to `paths[node]` just after your `else` statement.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\.append\s*\(\s*node\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\s*\.append\s*\(\s*node\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
index ae106b0b773..96979ad5482 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
@@ -28,7 +28,7 @@ You should print the provided string inside your new `for` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
+    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(\s*f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
index 2db001213f0..64a840dace9 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
@@ -32,7 +32,7 @@ You should create a variable called `targets_to_print` after your `while` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=/ms));
   }
 })
 ```
@@ -43,7 +43,7 @@ You should the ternary syntax to assign `[target]` when `target` is truthy, and
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
index d47d7e7c3a8..ba7067b061e 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
@@ -25,7 +25,7 @@ Just before your `print()` call, use the `del` keyword to delete the `age` key a
 You should use the `del` keyword to delete `copper['age']` before the `print()` call.
 
 ```js
-({ test: () => assert.match(code, /^del\s+copper\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
+({ test: () => assert.match(code, /^del\s+copper\s*\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
index f3ba4931686..a149344a2cd 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
@@ -24,7 +24,7 @@ Create an `__init__` method inside your `Board` class.
 Your method should be named `__init__`. Don't add any parameters.
 
 ```js
-assert.match(code, / +def\s+__init__\s*\(\)\:/);
+assert.match(code, / +def\s+__init__\s*\(\s*\)\:/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
index 088a7b7092d..1286ffc053a 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
@@ -43,7 +43,6 @@ class Board:
 --fcc-editable-region--
         for index, line in enumerate(self.board):
           row_list = []
-          
+
 --fcc-editable-region--
 ```
-
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
index ff8076a9be1..c7c6b9261b5 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
@@ -16,7 +16,7 @@ Use list slicing to create the three lists of equal length representing the `lin
 You should have `enumerate([line[:3], line[3:6], line[6:]], start=1)` within the inner `for` loop.
 
 ```js
-assert.match(code, /\[line\[:3\],\s*line\[3:6\],\s*line\[6:\]\]\s*,\s*start\s*=\s*1/);
+assert.match(code, /\[\s*line\s*\[\s*:3\s*\]\s*,\s*line\s*\[\s*3\s*:\s*6\s*\]\s*,\s*line\s*\[\s*6\s*:\s*\]\s*\]\s*,\s*start\s*=\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
index 7719f007280..c4f3bae63ac 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
@@ -14,13 +14,13 @@ In the `try` block, attempt to find the index of the first occurrence of `0` in
 Use the index of the first occurrence of `0` in the current row using `contents.index(0)`.
 
 ```js
-assert.match(code, /contents\.index\(0\)/)
+assert.match(code, /contents\.index\(\s*0\s*\)/)
 ```
 
 You should have `col = contents.index(0)` within the `try` block.
 
 ```js
-assert.match(code, /col\s*=\s*contents\.index\(0\)/)
+assert.match(code, /col\s*=\s*contents\.index\(\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
index 6b5995306bc..8ae3de67c4c 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
@@ -16,7 +16,7 @@ You should check if the number(`num`) is not present in `self.board[row]`.
 You should have `num not in self.board[row]` within `valid_in_row`.
 
 ```js
-assert.match(code, /num\s+not\s+in\s+self\.board\[row\]/)
+assert.match(code, /num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
index c40295f5eb8..1c864f43edf 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
@@ -21,7 +21,7 @@ You should have `return num not in self.board[row]` within `valid_in_row`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_row");
 const {function_body} = valid;
-assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\[row\]/);
+assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
index 7305cc4167d..2152e9e8721 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] != num` within `valid_in_col`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /self\.board\[row\]\[col\]\s*!=\s*num/);
+assert.match(function_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
index bab8bbc3353..54803e7c27c 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
@@ -28,7 +28,7 @@ You should have `all(self.board[row][col] != num for row in range(9))` within `v
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /all\s*\(\s*self\.board\[row\]\[col\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
+assert.match(function_body, /all\s*\(\s*self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
index 1ae19922a00..188669f7b6c 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
@@ -21,7 +21,7 @@ You should assign the result of `(row // 3) * 3` to `row_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /row_start\s*=\s*\(row\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /row_start\s*=\s*\(\s*row\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
index 5ff30c63ccf..81719dd96ee 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
@@ -21,7 +21,7 @@ You should assign the result of `(col // 3) * 3` to `col_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /col_start\s*=\s*\(col\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /col_start\s*=\s*\(\s*col\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
index 13d44223255..3ffff5236c7 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
@@ -22,7 +22,7 @@ You should have `next_empty := self.find_empty_cell()` within the `solver` metho
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\)/);
+assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
index 4620de206e5..65f3c3526f7 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
@@ -16,7 +16,7 @@ You should have `if (next_empty := self.find_empty_cell()) is None:` withing `so
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /if\s*\(next_empty\s*:=\s*self\.find_empty_cell\(\)\)\s*is\s*None:/)
+assert.match(function_body, /if\s*\(\s*next_empty\s*:=\s*self\.find_empty_cell\(\s*\)\s*\)\s*is\s*None:/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
index b894238946d..a9128397bd9 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
@@ -7,7 +7,7 @@ dashedName: step-64
 
 # --description--
 
-If still there are empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive).
+If there are still empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive). Your loop should use the variable named `guess`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have `for guess in range(1,10):` within the `else` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "else");
-assert.match(block_body, /for\s+\w+\s+in\s+range\(1,\s*10\)/);
+assert.match(block_body, /for\s+\w+\s+in\s+range\(\s*1,\s*10\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
index ee7eea1c359..2f623926327 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] = guess` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*guess/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*guess/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
index 8ae9f397f67..c5a437af763 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
@@ -17,7 +17,7 @@ You should have `self.solver()` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.solver\(\)/);
+assert.match(block_body, /self\.solver\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
index d512525744e..724e129790f 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
@@ -19,7 +19,7 @@ You should have `if self.solver():` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /if\s+self\.solver\(\):/);
+assert.match(block_body, /if\s+self\.solver\(\s*\):/);
 ```
 
 You should have `return True` within `if self.solver():`.
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
index 953ee12b0b4..3f475d8300a 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
@@ -19,7 +19,7 @@ You should have `self.board[row][col] = 0` outside the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*0/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*0/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
index 331def745c8..bf3a8b98539 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
@@ -18,7 +18,7 @@ You should have `gameboard = Board(board)` within the `solve_sudoku` function.
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solve_sudoku");
-assert.match(function_body, /gameboard\s*=\s*Board\(board\)/);
+assert.match(function_body, /gameboard\s*=\s*Board\(\s*board\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
index a84cb46d597..14fad657c1b 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
@@ -22,7 +22,7 @@ With this, you are finished with building the sudoku solver!
 Call the `solve_sudoku` method with `puzzle` as input.
 
 ```js
-assert.match(code, /solve_sudoku\(puzzle\)/);
+assert.match(code, /solve_sudoku\(\s*puzzle\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
index f62eaedcb67..449f3df12be 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
@@ -37,7 +37,7 @@ You should assign `array[:middle_point]` to the `left_part` variable.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /left_part\s*=\s*array\[:middle_point\]/);
+    assert.match(function_body, /left_part\s*=\s*array\s*\[\s*:\s*middle_point\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
index e6050f59c56..58417865b5a 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
@@ -22,7 +22,7 @@ You should replace `pass` keyword with an `if` statement with this condition: `l
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*pass/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
index fe0145062ff..8f3008f085d 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
@@ -24,7 +24,7 @@ You should replace `pass` with `array[sorted_index] = left_part[left_array_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*array\[sorted_index\]\s*=\s*left_part\[left_array_index\]\s*(?!.*\bpass\b)/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]\s*(?!.*\bpass\b)/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
index be274d696ef..5120942c0b3 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
@@ -24,7 +24,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /else:\s*[^}]*array\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /else:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
index fc91ccdb07a..a7bafbfb022 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
@@ -24,7 +24,7 @@ Your `while` loop should have this condition: `left_array_index < len(left_part)
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(left_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):/m);
   }
 })
 ```
@@ -38,7 +38,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
index fe0c9099967..6665a8f6e7a 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = left_part[left_array_index]` in the body
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ You should not have `pass` in the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
index 52f4257f5b7..9fe8b84b17c 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `left_array_i
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
index 5234570c047..436049deec5 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
@@ -22,7 +22,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
index 7e703ed5b4d..2d097ffea51 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
@@ -22,7 +22,7 @@ Your `while` loop should have this condition: `right_array_index < len(right_par
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(right_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):/m);
   }
 })
 ```
@@ -36,7 +36,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
index a2780dcdbbf..5d32d22f598 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
index cd212bd026d..c53482d12bd 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
@@ -20,7 +20,7 @@ You should have `right_array_index += 1` within the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bright_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bright_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
index 55d84481005..a81140ee4ce 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
index 7459368569e..2a137f7e7c8 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
@@ -24,7 +24,7 @@ You should create an `if` statement to check if `len(array) <= 1`. Don't forget
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*pass/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
index c6b33d2f73a..7ed83f69ef9 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
@@ -20,7 +20,7 @@ You should replace `pass` with a `return` statement in the body of the `if` stat
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*return/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the body of the `if` statement
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
index f86721cf941..f90734e69c5 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
@@ -21,8 +21,8 @@ You should add `1` to the current value of `left_array_index`.
     const { function_body } = merge_sort;
 
     const allowedMatches = [
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
     ]
 
     const anyMatch = allowedMatches.some((match) => match.test(function_body));
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
index ea5b25698aa..f1b84db6ee8 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
@@ -34,7 +34,7 @@ You should assign `array[middle_point:]` to the `right_part` variable
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /right_part\s*=\s*array\[middle_point:\]/);
+    assert.match(function_body, /right_part\s*=\s*array\s*\[\s*middle_point\s*:\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
index 7920c8f5372..4fd5a7c5fae 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
@@ -7,11 +7,11 @@ dashedName: step-2
 
 # --description--
 
-Replace the `pass` statement with a variable named `card_number` and a value of `4111-1111-4555-1142`.
+Replace the `pass` statement with a variable named `card_number` and a value of `'4111-1111-4555-1142'`.
 
 # --hints--
 
-You should have `card_number = "4111-1111-4555-1142"` within the `main` function.
+You should have `card_number = '4111-1111-4555-1142'` within the `main` function.
 
 ```js
 ({
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
index 7f60580526c..c8b19deafa9 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
@@ -13,7 +13,7 @@ The Luhn algorithm is as follows:
 
 1. From the right to left, double the value of every second digit; if the product is greater than 9, sum the digits of the products.
 2. Take the sum of all the digits.
-3. If the sum of all the digits is a multiple of `10`, then the number is valid; else it is not valid.
+3. If the sum of all the digits is a multiple of 10, then the number is valid; else it is not valid.
 
 Assume an example of an account number "7992739871" that will have a check digit added, making it of the form 7992739871x:
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
index a8d59cb99c3..a46e234d89b 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
@@ -30,7 +30,7 @@ You should have `card_number_reversed = card_number[0:4]` within the `verify_car
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
index cc1639fad5f..951112d20b0 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
@@ -20,7 +20,7 @@ You should have `odd_digits = card_number_reversed[::2]` within the `verify_card
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\[::2\]/);
+        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\s*\[\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
index 8ea7c49afaf..40b7703c299 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
@@ -27,7 +27,7 @@ You should have `sum_of_odd_digits += int(digit)` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(digit\)/);
+        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(\s*digit\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
index 1d4f4b8cb91..975452c1df2 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
@@ -20,7 +20,7 @@ You should have `even_digits = card_number_reversed[1::2]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\[1::2\]/);
+        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\s*\[\s*1\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
index ef350e0a93a..cee2f3a3fb2 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
@@ -22,7 +22,7 @@ You should have `number = int(digit) * 2` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /number\s*=\s*int\(digit\)\s*\*\s*2/);
+        assert.match(function_body, /number\s*=\s*int\(\s*digit\s*\)\s*\*\s*2/);
     }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
index 2b3506a72ba..a23a54c1113 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
@@ -30,8 +30,8 @@ You should have `number = number // 10 + number % 10` within the `if` statement.
         const verify_card_number = __helpers.python.getBlock("\n" + transformedCode, "if number >= 10");
         const { block_body } = verify_card_number;
         const allowedMatches = [
-            /number *= *\(?number *\/\/ *10\)? *\+ *\(?number *% *10/,
-            /number *= *\(?number *% *10\)? *\+ *\(?number *\/\/ *10/
+            /number *= *\(?\s*number *\/\/ *10\s*\)? *\+ *\(?\s*number *% *10/,
+            /number *= *\(?\s*number *% *10\s*\)? *\+ *\(?\s*number *\/\/ *10/
         ];
 
         const someMatch = allowedMatches.some(allowedMatch => allowedMatch.test(block_body));
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
index 3bc147205ff..637449e4ce9 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
@@ -7,7 +7,7 @@ dashedName: step-33
 
 # --description--
 
-Adjust the `verify_card_number` call such that if it returns `True`, print `VALID!` to the console. Otherwise, print `INVALID!`.
+Adjust the `verify_card_number` call such that if it returns `True`, print `'VALID!'` to the console. Otherwise, print `'INVALID!'`.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `if verify_card_number(translated_card_number):` within the `mai
 })
 ```
 
-You should have `print("VALID!")` within the `if` statement.
+You should have `print('VALID!')` within the `if` statement.
 
 ```js
 ({
@@ -40,7 +40,7 @@ You should have `print("VALID!")` within the `if` statement.
 })
 ```
 
-You should have `print("INVALID!")` within the `else` clause.
+You should have `print('INVALID!')` within the `else` clause.
 
 ```js
 ({
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
index 78a93856cd4..ade22dc06a9 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
@@ -7,7 +7,7 @@ dashedName: step-34
 
 # --description--
 
-Change the value of `card_number` such that `INVALID!` is printed to the console.
+Change the value of `card_number` such that `'INVALID!'` is printed to the console.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
index adce5b9c9d1..1bb8299b598 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
@@ -20,7 +20,7 @@ You should have `card_number_reversed = card_number[0:4:2]` within the `verify_c
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4:2\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
index 6fccc787feb..09c5def551d 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
@@ -27,7 +27,7 @@ You should have `card_number_reversed = card_number[::-1]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[::-1\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*:\s*:\s*-1\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
index f66afb98ff8..1b5ad8ef574 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
@@ -10,10 +10,10 @@ dashedName: step-4
 A dictionary is another built-in data type in Python. A dictionary is a collection of data in the form of *key*-*value* pairs. Dictionaries are defined with curly braces `{}` and they contain key-value pairs separated by commas. Each key is followed by a colon `:` and the value:
 
 ```py
-{"amount": 50.0, "category": "Food"}
+{'amount': 50.0, 'category': 'Food'}
 ```
 
-In the example above, `amount` and `category` are keys, and `50.0` and `Food` are their the corresponding values.
+In the example above, `amount` and `category` are keys, and `50.0` and `'Food'` are their the corresponding values.
 
 Create a dictionary with a key `amount` and value of the `amount` parameter and pass your new dictionary to the `.append()` call.
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
index 03a80b67bb5..18143670be7 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `category` as the key, and the `category` parameter as the value.
+Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `'category'` as the key, and the `category` parameter as the value.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
index edfd38f9c7e..b8c1c542d38 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
@@ -10,11 +10,11 @@ dashedName: step-9
 You can access values in a dictionary through its keys. You need to use the bracket notation and include the key between the square brackets:
 
 ```py
-my_dict = {"amount": 50.0, "category": "Food"}
-my_dict["amount"] # 50.0
+my_dict = {'amount': 50.0, 'category': 'Food'}
+my_dict['amount'] # 50.0
 ```
 
-You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `amount` key and the `category` key in the `expense` dictionary.
+You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `'amount'` key and the `'category'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
index 3ffd3c53501..30c55e4f1a1 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
@@ -13,7 +13,7 @@ Lambda functions are brief, anonymous functions in Python, ideal for simple, one
 lambda x: expr
 ```
 
-In the example above, `x` is a parameter to be use in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
+In the example above, `x` is a parameter to be used in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
index cc5a084d4d2..2a6d7c0523c 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `amount` key in the `expense` dictionary.
+Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `'amount'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
index 51dfe25b827..b9bc26f2ba5 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `category` key of the `expense` dictionary and `category`.
+Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `'category'` key of the `expense` dictionary and `category`.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
index 10e9209ce3b..c1a9067f446 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
@@ -23,7 +23,7 @@ You should define a function named `main()` without parameters.
 })
 ```
 
-You should move the `expense` list inside the `main()` function body.
+You should move the `expenses` list inside the `main()` function body.
 
 ```js
 ({ test: () => assert(__pyodide.runPython(`
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
index 312d1831baf..d0d4b683356 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
@@ -14,7 +14,7 @@ while condition:
     <code>
 ```
 
-Below the `expense` list, create a `while` loop. Use `True` for the condition, and print the string `\nExpense Tracker` inside the loop body to show the title of the program.
+Below the `expenses` list, create a `while` loop. Use `True` for the condition, and print the string `'\nExpense Tracker'` inside the loop body to show the title of the program.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
index 36b7a734222..7b740f1a123 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
@@ -9,7 +9,7 @@ dashedName: step-25
 
 The `while` loop you created in the previous step is an infinite loop that will allow the program to continuously present menu options until the user decides to exit.
 
-After the `print()` call, add another one to print the string `1. Add an expense`.
+After the `print()` call, add another one to print the string `'1. Add an expense'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
index 184d86d496c..b3d81f773a9 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
@@ -7,7 +7,7 @@ dashedName: step-26
 
 # --description--
 
-Next, add another `print()` call and pass the string `2. List all expenses`.
+Next, add another `print()` call and pass the string `'2. List all expenses'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
index 58da8a77ab1..c7b7d61a41d 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
@@ -7,7 +7,7 @@ dashedName: step-27
 
 # --description--
 
-Provide the other menu options by printing the following three strings in your `while` loop: `3. Show total expenses`, `4. Filter expenses by category`, and `5. Exit`.
+Provide the other menu options by printing the following three strings in your `while` loop: `'3. Show total expenses'`, `'4. Filter expenses by category'`, and `'5. Exit'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
index c32dcf4087b..998d0a2f143 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
@@ -9,7 +9,7 @@ dashedName: step-28
 
 The `input()` function takes a user input and it returns the user input in the form of a string.
 
-Inside your `while` loop, call the `input()` function passing the string `Enter your choice:` as the argument, and assign the result to a variable named `choice`.
+Inside your `while` loop, call the `input()` function passing the string `'Enter your choice: '` as the argument, and assign the result to a variable named `choice`.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
index c5db1e1bfd5..3f53491bf22 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
@@ -7,9 +7,9 @@ dashedName: step-29
 
 # --description--
 
-You are going to use conditional statements to check the user's choice. If the choice is `1`, it means the user wants to add an expense.
+You are going to use conditional statements to check the user's choice. If the choice is `'1'`, it means the user wants to add an expense.
 
-Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `1`. If it's true, it will be the starting point for adding a new expense.
+Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `'1'`. If it's true, it will be the starting point for adding a new expense.
 
 Inside the `if` statement body, declare a variable `amount` and assign it an empty `input()` call.
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
index 40fcdcbd2c7..c822106429e 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
@@ -9,7 +9,7 @@ dashedName: step-30
 
 Inside the `if` statement, you should ask the user to enter the amount for the expense and store it in a variable.
 
-Pass the string `Enter amount:` to your empty `input()` call, so you can store the expense.
+Pass the string `'Enter amount: '` to your empty `input()` call, so you can store the expense.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
index 2f3fd793f62..2d6f8815537 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
@@ -9,7 +9,7 @@ dashedName: step-34
 
 To list all expenses, you can use an `elif` statement after an `if` statement. The `elif` checks additional conditions and only works following an `if` statement.
 
-Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `\nAll Expenses:`.
+Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `'\nAll Expenses:'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
index 3f1cca1ba3b..e0eeb04d387 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
@@ -9,7 +9,7 @@ dashedName: step-36
 
 To show the total expenses, create an `elif` statement that checks if `choice == '3'`.
 
-If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `\nTotal Expenses:` as the first argument and `total_expenses(expenses)` as the second argument.
+If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `'\nTotal Expenses: '` as the first argument and `total_expenses(expenses)` as the second argument.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
index 346de53481d..eb2cfdf52f8 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
@@ -7,9 +7,9 @@ dashedName: step-41
 
 # --description--
 
-To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `5`.
+To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `'5'`.
 
-Inside the new `elif` statement, print the string `Exiting the program.` to show that the program is terminating its execution.
+Inside the new `elif` statement, print the string `'Exiting the program.'` to show that the program is terminating its execution.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `elif choice == '5':` in your code.
 })
 ```
 
-You should print `Exiting the program.` in your new `elif` statement.
+You should print `'Exiting the program.'` in your new `elif` statement.
 
 ```js
 ({ test: () =>
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
index 4ca483f51d7..7dabb61a379 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
@@ -22,7 +22,7 @@ You should replace `pass` with an empty list named `snake_cased_char_list` withi
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\]/);
+        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\s*\]\s*/);
     }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
index ecb8171c272..88d5bbd7d13 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
@@ -34,7 +34,7 @@ You should use the `.append()` method to add `char` to the `snake_cased_char_lis
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list.append\(char\)/);
+        assert.match(function_body, / +snake_cased_char_list.append\(\s*char\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
index a3c818f4528..37bbc4bdae3 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
@@ -7,11 +7,11 @@ dashedName: step-12
 
 # --description--
 
-Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `aLongAndComplexString` as input to the function and print out the output using the `print()` function.
+Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `'aLongAndComplexString'` as input to the function and print out the output using the `print()` function.
 
 # --hints--
 
-You should call `convert_to_snake_case()` inside the `main()` function and pass `aLongAndComplexString` as input to the function.
+You should call `convert_to_snake_case()` inside the `main()` function and pass `'aLongAndComplexString'` as input to the function.
 
 ```js
 ({
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
index f16cbe66867..b5bc63c55db 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
@@ -7,7 +7,7 @@ dashedName: step-22
 
 # --description--
 
-Finally try out this new implementation by executing the program. Change the input string to `IAmAPascalCasedString` and see if it comes out as `i_am_a_pascal_cased_string`, even though that's a lie.
+Finally try out this new implementation by executing the program. Change the input string to `'IAmAPascalCasedString'` and see if it comes out as `'i_am_a_pascal_cased_string'`, even though that's a lie.
 
 If you've done everything correctly, you should see the input string converted into snake case, like before.
 
@@ -15,7 +15,7 @@ Congratulations! Now your `convert_to_snake_case()` function is ready.
 
 # --hints--
 
-You should change the input string from `aLongAndComplexString` to `IAmAPascalCasedString` inside the `main()` function.
+You should change the input string from `'aLongAndComplexString'` to `'IAmAPascalCasedString'` inside the `main()` function.
 
 ```js
 ({
@@ -24,7 +24,7 @@ You should change the input string from `aLongAndComplexString` to `IAmAPascalCa
         const main = __helpers.python.getDef("\n" + transformedCode, "main");
         const { function_body } = main;
 
-        assert.match(function_body, / +print\(convert_to_snake_case\('IAmAPascalCasedString'\)\)/);
+        assert.match(function_body, / +print\(\s*convert_to_snake_case\(\s*'IAmAPascalCasedString'\s*\)\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
index f95ea4510ea..3764415d301 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
@@ -7,9 +7,9 @@ dashedName: step-3
 
 # --description--
 
-The puzzle starts with the disks piled up on the first rod, in decreasing size. You need to populate your first list with numbers representing the various disk sizes.
+The puzzle starts with the disks piled up on the first rod, in decreasing size, with the smallest disk on top and the largest disk on the bottom. You need to populate your first list with numbers representing the various disk sizes.
 
-Instead of adding the items manually to the first list, generate a sequence of numbers from `3` to `1` by using the `range()` function and assign it to `rods['A']`.
+Instead of adding the items manually to the first list, generate a sequence of numbers counting down from `3` to `1` by using the `range()` function and assign it to `rods['A']`. Here, `3` represents the largest disk at the bottom of the pile and `1` represents the smallest disk at the top of the pile.
 
 The syntax is `range(x, y, h)`, where `x` is the starting integer (inclusive), `y` is the last integer (not inclusive), and `h` is the difference between a number and the next one in the sequence.
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
index 61e9c2eceba..3ee649263ea 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
@@ -14,13 +14,13 @@ Now check the data type of your `'A'` key by passing it to the `type()` function
 You should pass your `'A'` key to the `type()` function.
 
 ```js
-({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)/) })
+({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)/) })
 ```
 
 You should print the type of `rods['A']` using the `print()` function.
 
 ```js
-({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)\s*\)/) })
+({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
index 91089d7111e..35834685f2f 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
@@ -14,7 +14,7 @@ Now that the type is `list` as required, you can remove the `print()` call.
 You should remove `print(type(rods['A']))` from your code.
 
 ```js
-({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
+({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
index 3a2ec2582fd..d3617fb6a99 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
@@ -9,7 +9,7 @@ dashedName: step-16
 
 At the end of this project, you will create a recursive solution to the Tower of Hanoi puzzle, but now you are going to explore an iterative approach to this problem.
 
-Start by adding a `for` loop to your function that iterates through the number of moves and prints the current iteration number.
+Start by adding a `for` loop to your function that iterates through the `number_of_moves` and prints the current iteration number.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
index 68da7edd11e..51fee0996ff 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `A` and `B` (the source and the auxiliary rods).
+When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `'A'` and `'B'` (the source and the auxiliary rods).
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
index ffbb63d6303..7d634f11e8e 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
@@ -7,7 +7,7 @@ dashedName: step-21
 
 # --description--
 
-Finally, when the move number divided by 3 has no remainder, the movement is allowed between `B` and `C`.
+Finally, when the move number divided by 3 has no remainder, the movement is allowed between `'B'` and `'C'`.
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
index 3ee15a5e14c..eab961b9bff 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
@@ -18,10 +18,10 @@ You should have an `elif` statement to check if `rods[source]` is not empty and
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:`);
 assert.match(code, re);
 ```
 
@@ -30,10 +30,10 @@ You should set `forward` to `True` inside your new `elif` statement. You should
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
 assert.match(code, re);
 ```
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
index dabb3aaa9d3..cd28898af30 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
@@ -20,7 +20,7 @@ You should add an `if` statement to execute when `forward` is `True` after the `
 You should print the provide string inside your new `if` statement.
 
 ```js
-({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
+({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
index ec3c58fced1..49f2e985e15 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
@@ -14,13 +14,13 @@ After printing the move, you need to remove the last element from the source rod
 You should remove the last element from `rods[source]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[target].append(rods[source].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
index 9c8eec662bd..1956b9ceb3f 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
@@ -14,25 +14,25 @@ When `forward` is `False`, the disk has to be moved in the opposite direction. W
 You should have an `else` clause to move the disks in the opposite direction.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
 ```
 
 You should have `print(f'Moving disk {rods[target][-1]} from {target} to {source}')` inside your `else` clause.
 
 ```js
-({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
+({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
 ```
 
 You should remove the last element from `rods[target]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[source].append(rods[target].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
index 35acd218b10..b64259ac990 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
@@ -14,13 +14,13 @@ Outside the `else` block, add a comment saying `display our progress` and print
 You should use the provided text to add a comment outside the `else` block.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
 ```
 
 You should print the `rods` object outside the `else` block, after the comment.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
index cbdd362cb35..c4fde4720eb 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
@@ -15,7 +15,7 @@ You should move the code nested inside the first `if` statement (except the firs
 
 ```js
 ({ test: () => {
-  assert.match(code, /def\s+make_allowed_move\(rod1, rod2\):\s+forward\s+=\s+False\s+if\s+not\s+rods\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\[\s*source\s*\]\s+and\s+rods\[\s*source\s*\]\[-1\]\s<\srods\[\s*target\s*\]\[\s*-\s*1\s*\]:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\[\s*source\s*\].append\(\s*rods\[\s*target\s*\].pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+\print\(\s*rods\s*\)/);
+  assert.match(code, /def\s+make_allowed_move\(\s*rod1, rod2\s*\):\s+forward\s+=\s+False\s+if\s+not\s+rods\s*\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\s*\[\s*source\s*\]\s+and\s+rods\s*\[\s*source\s*\]\s*\[\s*-1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\s*\[\s*source\s*\]\s*\.append\(\s*rods\s*\[\s*target\s*\]\s*\.pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\(\s*rods\s*\)/);
   }
 })
 ```
@@ -47,7 +47,7 @@ def move(n, source, auxiliary, target):
             if not rods[target]:
                 forward = True
             elif rods[source] and rods[source][-1] < rods[target][-1]:
-                forward = True              
+                forward = True
             if forward:
                 print(f'Moving disk {rods[source][-1]} from {source} to {target}')
                 rods[target].append(rods[source].pop())
@@ -57,7 +57,7 @@ def move(n, source, auxiliary, target):
 
             # display our progress
             print(rods)
---fcc-editable-region--            
+--fcc-editable-region--
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
         elif remainder == 0:
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
index bd83003ca67..6151529e7db 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
@@ -15,11 +15,11 @@ You should change each occurrence of `source` inside the `make_allowed_move()` f
 
 ```js
 ({ test: () => {
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
index e54db75e195..838995eb931 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
@@ -16,11 +16,11 @@ You should change each occurrence of `target` inside `make_allowed_move` into `r
 ```js
 ({ test: () => {
   assert.match(code, /if\s+not\s+rods\s*\[\s*rod2\s*\]\s*:/);
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\[\s*rod2\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*rod2\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\s*\[\s*rod2\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod2\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
index 80ed5af0028..4d6905a4753 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
@@ -11,7 +11,7 @@ It looks like it's working! But the output is not very readable. Print a new lin
 
 # --hints--
 
-You should pass a string with a new line character (`\n`) as the second argument for your two `print(rods)` calls.
+You should pass a string with a new line character (`'\n'`) as the second argument for your two `print(rods)` calls.
 
 ```js
 ({ test: () => assert.match(code, /print\(\s*rods\s*,\s*('|")\\n\1\s*\)(?=.*print\(\s*rods\s*,\s*('|")\\n\2\s*\))/s) })
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
index e263835f1ed..7b925412417 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
@@ -16,7 +16,7 @@ For now, each recursive call prints the `rods` dictionary without performing any
 You should remove the last element from the `rods[source]` list and append it to the `rods[target]` list before the `print` call.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
index 3beca450923..8b046fc920c 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
@@ -14,7 +14,7 @@ Before appending the last element to the target, add a comment saying `move the
 You should add a comment with the provided text before `rods[target].append(rods[source].pop())`.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\))/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
index 276313fc93a..de70a2e7f20 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Although recursion could sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
+Although recursion can sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
 
 Set `NUMBER_OF_DISKS` to `5` and check the output.
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
index b9bcd50bb72..46ce35708f2 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
@@ -21,7 +21,7 @@ You should delete the last three lines in your code.
 ({ test: () => {
   assert.isFalse(/pattern\s*=\s*r("|')\\W\1/.test(code));
   assert.isFalse(/quote\s*=\s*("|')_\1/.test(code));
-  assert.isFalse(/print\(re\.findall\(pattern, quote\)\)/.test(code));
+  assert.isFalse(/print\(\s*re\.findall\(\s*pattern, quote\s*\)\s*\)/.test(code));
 }})
 ```
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
index 683e11b11e9..8f8c69b5c97 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
@@ -14,7 +14,7 @@ Now, turn the empty string in the constraint tuple into a regex pattern to match
 You should have the `(nums, '[0123456789]')` tuple in your `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
+({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
index 28bfad7644e..10bcbc68f83 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
@@ -27,7 +27,7 @@ You should replace your existing `for` loop and two `if` statements with a singl
 Your new `if` condition should be a list comprehension that is the result of evaluating the expression `constraint <= len(re.findall(pattern, password))` for each `constraint`-`pattern` tuple in the `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /^(\s{8})if\s+\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
+({ test: () => assert.match(code, /^(\s{8})if\s*\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
index 5a7a8e606dd..c0292895138 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ecf597038c36637f3759.md
@@ -1,6 +1,6 @@
 ---
 id: 6551ecf597038c36637f3759
-title: Step 1
+title: Hatua ya 1
 challengeType: 20
 dashedName: step-1
 ---
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
index 2e6d119b78b..b52757918a3 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
@@ -1,6 +1,6 @@
 ---
 id: 6551eebe6cbb2e6cadf9b468
-title: Step 2
+title: Hatua ya 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -15,7 +15,7 @@ string_2 = 'I am also a string'
 string_3 = 'This is not valid"
 ```
 
-Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `Hello World` to this variable.
+Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `'Hello World'` to this variable.
 
 # --hints--
 
@@ -32,7 +32,7 @@ You should declare a variable called `text`. Pay attention to place the variable
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello World` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
+You should assign the string `'Hello World'` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello World\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
index d40877ed6af..2b65b4b4212 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
@@ -14,7 +14,7 @@ greet = 'Hello!'
 print(greet)
 ```
 
-The code in the example above would print the string `Hello!`, which is the value of the variable `greet` passed to `print()` as the argument.
+The code in the example above would print the string `'Hello!'`, which is the value of the variable `greet` passed to `print()` as the argument.
 
 Print your `text` variable to the screen by passing the `text` variable as the argument to the `print()` function.
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
index 86104aff4f6..7c28d74b6b7 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `Hello World`, `H` is at index `0`, `e` is at index `1`, and so on. 
+Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `'Hello World'`, `'H'` is at index `0`, `'e'` is at index `1`, and so on.
 
 Each character of a string can be accessed by using bracket notation. You need to write the variable name followed by square brackets and add the index of the character between the brackets:
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
index 5d0ae1dd2fa..3103cb653bf 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-You can see `11` printed on the terminal because `Hello World` contains 11 characters.
+You can see `11` printed on the terminal because `'Hello World'` contains 11 characters.
 
 Another useful built-in function is `type()`, which returns the data type of a variable. Modify your `print()` call to print the data type of `text`.
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
index cedb112a823..074c15b2e19 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
@@ -14,7 +14,7 @@ Key aspects of variable naming in Python are:
 - Variable names are case sensitive, i.e. `my_var` is different from `my_Var` and `MY_VAR`.
 - Finally, it is a common convention to write variable names using `snake_case`, where each space is replaced by an underscore character and the words are written in lowercase letters.
 
-Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `abcdefghijklmnopqrstuvwxyz` to this variable.
+Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `'abcdefghijklmnopqrstuvwxyz'` to this variable.
 
 # --hints--
 
@@ -38,7 +38,7 @@ You should declare a variable called `alphabet`. Pay attention to place the vari
 assert.match(code, /^alphabet\s*=/m)
 ```
 
-You should assign the string `abcdefghijklmnopqrstuvwxyz` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
+You should assign the string `'abcdefghijklmnopqrstuvwxyz'` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
 
 ```js
 assert.match(code, /^alphabet\s*=\s*("|')abcdefghijklmnopqrstuvwxyz\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
index abe8ced263d..5c272b6d6f1 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
@@ -15,7 +15,7 @@ Start by finding the position of the first letter in the string. One way is to c
 text.find('W')
 ```
 
-Above, uppercase `W` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `W` character inside the string stored in the `text` variable.
+Above, uppercase `'W'` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `'W'` character inside the string stored in the `text` variable.
 
 At the end of your code, call `.find()` on your `alphabet` string and pass `text[0]` to the method. Note that a method is just a function that belongs to an object (you will learn more about that in another project).
 
@@ -36,7 +36,7 @@ assert.match(code, /alphabet\.find\s*\(.*\)/)
 You should call the `.find()` method on the `alphabet` variable and pass `text[0]` to the method. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)/m)
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 412619ccc4c..3e3af82109c 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -22,7 +22,7 @@ assert.match(code, /^index\s*=/m)
 You should assign the value returned by `alphabet.find(text[0])` to your `index` variable.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 34166fe3da4..83feddb9318 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `H`, is not found, since `alphabet` contains only lowercase letters.
+`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `'H'`, is not found, since `alphabet` contains only lowercase letters.
 
 You can transform a string into its lowercase equivalent with the `.lower()` method. Add another `print()` call to print `text.lower()` and see the output.
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index 54d47cf3f49..9a554ddeef1 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -27,7 +27,7 @@ assert.match(code, /^print\s*\(\s*index\s*\)/m);
 You should update your `alphabet.find(text[0])` call to use `text[0].lower()` as the argument. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index 95e2567fa84..e4c0036ebff 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-As you can see from the output, `h` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
+As you can see from the output, `'h'` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
 
 Modify your `shifted` variable so that it stores the value of `alphabet` at index `index + shift`.
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index 41811515713..a8da79ffd22 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -35,14 +35,14 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i/m)
 ```
 
-You should write the `in` keyword after `for i `. Make sure to leave a space around the `in` keyword.
+You should write the `in` keyword after `for i`. Make sure to leave a space around the `in` keyword.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i\s+in\s+/m)
 ```
 
-You should write `text` after `for i in `. Don't forget to add the final `:`.
+You should write `text` after `for i in`. Don't forget to add the final `:`.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index b7051de41c3..bdf47ed7c6f 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -7,7 +7,7 @@ dashedName: step-42
 
 # --description--
 
-Currently, spaces get encrypted as `c`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
+Currently, spaces get encrypted as `'c'`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
 
 ```py
 if x != 0:
@@ -16,7 +16,7 @@ if x != 0:
 
 In the example above, the condition of the `if` statement is `x != 0`. The code `print(x)`, inside the `if` statement body, runs only when the condition evaluates to `True` (in this example, meaning that `x` is different from zero).
 
-At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `space!`. Remember to indent this line.
+At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `'space!'`. Remember to indent this line.
 
 # --hints--
 
@@ -36,7 +36,7 @@ const {block_body} = __helpers.python.getBlock(commentless_code, /for\s+char\s+i
 assert(block_body.match(/if\s+char\s*==\s*("|')\s\1\s*:/));
 ```
 
-You should print the string `space!` inside your new `if` statement.
+You should print the string `'space!'` inside your new `if` statement.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index 69191130521..f3fc108e506 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, instead of printing `space!`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
+Now, instead of printing `'space!'`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index dfc91239b0e..f6ea23b4325 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Try to assign the string `Hello Zaira` to your `text` variable and see what happens in the console.
+Try to assign the string `'Hello Zaira'` to your `text` variable and see what happens in the console.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have a `text` variable.
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello Zaira` to your `text` variable.
+You should assign the string `'Hello Zaira'` to your `text` variable.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello\sZaira\1/m)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index 5629c8d00fb..b5f4088d3b7 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -7,7 +7,7 @@ dashedName: step-58
 
 # --description--
 
-Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `python` to this variable.
+Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `'python'` to this variable.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should declare a variable called `custom_key`.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should assign the string `python` to your `custom_key` variable.
+You should assign the string `'python'` to your `custom_key` variable.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "python") })
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 179f7313a5d..47211f5e8bc 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -7,8 +7,7 @@ dashedName: step-59
 
 # --description--
 
-Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text.
-At the beginning of your function body, declare a `key_index` variable and set it to zero.
+Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text. At the beginning of your function body, declare a `key_index` variable and set it to zero.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 660fb4ab263..7e452e05438 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
 
     for char in message.lower():
 --fcc-editable-region--
-        
+
         if char == ' ':
             encrypted_text += char
 --fcc-editable-region--            
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7727f6c57a8..7ca155b0c73 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -7,8 +7,7 @@ dashedName: step-62
 
 # --description--
 
-You will need to increase the `key_index` count for the next iteration.
-To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
+You will need to increase the `key_index` count for the next iteration. To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index 67567e88cdf..a6cd4a9a348 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
         if char == ' ':
             encrypted_text += char
         else:
-            
+
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index da202c1490a..7ca3ec197c0 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -50,7 +50,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key):
             # Find the right key character to encode
             key_char = key[key_index % len(key)]
             key_index += 1
-            
+
 --fcc-editable-region--            
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index 7ca7c2f323a..f783cbf3472 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -32,7 +32,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -41,7 +41,7 @@ def vigenere(message, key):
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
-            
+
             offset = alphabet.index(key_char)
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index a371865b1ef..28c793c06c3 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -55,7 +55,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index 60289b5525e..acf5b0f71c8 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -43,7 +43,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -57,7 +57,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index b1f7c3a5caa..87f8a5aa7f3 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -31,7 +31,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 534ff69ec91..84f3a8477e1 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -46,7 +46,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -60,9 +60,9 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 --fcc-editable-region--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index 3dfdd998a92..d29b009f3cf 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -47,9 +47,9 @@ def vigenere(message, key, direction):
             new_index = (index + offset) % len(alphabet)
 --fcc-editable-region--
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 #encryption = vigenere(text, custom_key)
 #print(encryption)
 ```
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 330871bc52a..9f1ea94390c 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,9 +45,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 --fcc-editable-region--
 #encryption = vigenere(text, custom_key)
 #print(encryption)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index db2c5bdfe33..adf869e6b5f 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index b4b329858a2..8e744b4c09f 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index f49b76f417f..cd7e9ce3a58 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -39,7 +39,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -53,7 +53,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index b295655e5c6..a6ecf2194d0 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -38,7 +38,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -52,9 +52,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index 521f1f961d3..d77bcd5d985 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -19,7 +19,7 @@ You should have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should be equal to the string `Hello Zaira!`.
+Your `text` variable should be equal to the string `'Hello Zaira!'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "Hello Zaira!") })
@@ -40,7 +40,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -54,9 +54,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index f9dfeed2c7d..a60afdc14cc 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -53,9 +53,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index fa8531f3421..40bfdb53982 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -48,9 +48,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index aba2d5665d2..822b22f2743 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -46,9 +46,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index a8a4a146373..82df5c7e409 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -70,7 +70,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index 900a42440bf..ceda0450cc8 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -51,7 +51,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index b37f689c14a..c0d946a1d38 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index d863b1b5667..e86470c6c34 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -51,15 +51,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index e7e001fd7b2..cb2c9d5e191 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -9,7 +9,7 @@ dashedName: step-86
 
 It works! Now, you are going to start with an encrypted message to be decrypted.
 
-Change the value of `text` to the string `mrttaqrhknsw ih puggrur`.
+Change the value of `text` to the string `'mrttaqrhknsw ih puggrur'`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should still have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should have the value of `mrttaqrhknsw ih puggrur`.
+Your `text` variable should have the value of `'mrttaqrhknsw ih puggrur'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "mrttaqrhknsw ih puggrur") })
@@ -54,15 +54,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = encrypt(text, custom_key)
 print(encryption)
 decryption = decrypt(encryption, custom_key)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index 7295239a2e5..a2e43552133 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -46,7 +46,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -60,9 +60,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 582c138e1b3..3cfffa05b63 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index 43650a129a7..b809b6cc227 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -9,11 +9,11 @@ dashedName: step-88
 
 Two or more strings can be concatenated by using the `+` operator. For example: `'Hello' + ' there!'` results in `'Hello there!`.
 
-Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `Encrypted text: `. Pay attention to the spacing.
+Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `'Encrypted text: '`. Pay attention to the spacing.
 
 # --hints--
 
-You should call `print()` and pass `'Encrypted text: ' + text` as the arguments. 
+You should call `print()` and pass `'Encrypted text: ' + text` as the arguments.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--    
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index 68b96128144..bb3bf128cf9 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -7,11 +7,11 @@ dashedName: step-89
 
 # --description--
 
-Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 # --hints--
 
-You should have a `print()` call that prints `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+You should have a `print()` call that prints `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -52,12 +52,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index e52496dd150..6d5c9a3c856 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -7,7 +7,7 @@ dashedName: step-90
 
 # --description--
 
-In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings. 
+In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings.
 
 Interpolation means writing placeholders that will be replaced by the specified values when the program runs. For example, you can get the same result of `'Encrypted text: ' + text` with `f'Encrypted text: {text}'`. You need to put an `f` before the quotes to create the f-string and write the variables or expressions you want to interpolate between curly braces.
 
@@ -49,12 +49,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index ebdb8b79456..4e28d4737fc 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index 8e107b0fff4..d55577ba1cf 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -47,12 +47,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 0f916bf649e..073dfdcd2bb 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -50,12 +50,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 23af806c5ce..006a04850ea 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -7,7 +7,7 @@ dashedName: step-95
 
 # --description--
 
-Wait a minute! You cannot decrypt anything with the wrong key. Try with `happycoding`.
+Wait a minute! You cannot decrypt anything with the wrong key. Try with `'happycoding'`.
 
 With that, your cipher project is complete.
 
@@ -19,7 +19,7 @@ You should still have a `custom_key` variable.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should modify the `custom_key` value into `happycoding`.
+You should modify the `custom_key` value into `'happycoding'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "happycoding") })
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
@@ -96,12 +96,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 05c44517e6f..9a4c27f1945 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -7,8 +7,7 @@ dashedName: step-41
 
 # --description--
 
-Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare.
-They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
+Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare. They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
 
 Python has the following comparison operators:
 
@@ -47,11 +46,11 @@ Python has the following comparison operators:
   </tbody>
 </table>
 
-At the beginning of your loop body, print the result of comparing `char` with an empty space (`' '`). Use the equality operator `==` for that.
+At the beginning of your loop body, print the result of comparing `char` with a space (`' '`). Use the equality operator `==` for that.
 
 # --hints--
 
-You should compare `char` with an empty space using the equality operator inside your `for` loop.
+You should compare `char` with a space using the equality operator inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -62,7 +61,7 @@ You should compare `char` with an empty space using the equality operator inside
 })
 ```
 
-You should print the result of comparing `char` with an empty space inside your `for` loop.
+You should print the result of comparing `char` with a space inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -73,7 +72,7 @@ You should print the result of comparing `char` with an empty space inside your
 })
 ```
 
-You should print the result of comparing `char` with an empty space at the beginning of your loop.
+You should print the result of comparing `char` with a space at the beginning of your loop.
 
 ```js
 ({ test: () => {
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 34e53a7cc4f..86a5a8baa9a 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -18,7 +18,7 @@ Give your `for` loop a body by adding a call to `print(i)`. Remember to indent t
 
 # --hints--
 
-You should add `print(i)` to your `for` loop body. Pay attention to the indentation. 
+You should add `print(i)` to your `for` loop body. Pay attention to the indentation.
 
 ```js
 assert.match(code, /^for\s+i\s+in\s+text:\s+print\s*\(\s*i\s*\)/m)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index e7886b5f796..042349ee0a4 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -15,7 +15,7 @@ Restore the indentation for your `print(i)` call.
 
 # --hints--
 
-You should indent `print(i)` inside your `for` loop body. 
+You should indent `print(i)` inside your `for` loop body.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index 6215b77a724..f971dfe2276 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -13,7 +13,7 @@ Rename your `i` variable to `char`.
 
 # --hints--
 
-You should replace `i` with `char`. 
+You should replace `i` with `char`.
 
 ```js
 assert.match(code, /^for\s+char\s+in\s+text:\s+print\s*\(\s*char\s*\)/m)
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index b2203350e08..97fee73da43 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -7,7 +7,7 @@ dashedName: step-31
 
 # --description--
 
-Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `train`, but this is not valid:
+Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `'train'`, but this is not valid:
 
 ```py
 my_string = 'brain'
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index 39784236282..e2b04ef618e 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -14,7 +14,7 @@ message = 'Hello World'
 message = 'Hello there!'
 ```
 
-Delete the `text[0]` line and reassign `text` the string `Albatross`.
+Delete the `text[0]` line and reassign `text` the string `'Albatross'`.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*\[\s*0\s*\]\s*\=\s*("|')\w\1/.test(commentless_code));
 ```
 
-You should reassign `text` the string `Albatross`. Do not modify `text = 'Hello World'`.
+You should reassign `text` the string `'Albatross'`. Do not modify `text = 'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 076a71f8786..6b04513e34d 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -20,7 +20,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*=\s*("|')Albatross\1/.test(commentless_code))
 ```
 
-You should still have a `text` variable with the value `Hello World`.
+You should still have a `text` variable with the value `'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index 442d9c6cb33..a98c25c7099 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index 71e999219ba..d239d653b25 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
index 943c73153b6..b8f3e7f4fc9 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
@@ -16,13 +16,13 @@ Delete `pass` and recursively call the `_insert` method on the left child of the
 You should call the `self._insert` method passing `node.left` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the `left` attribute of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
index e47f5304aca..f82814fbdbf 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
@@ -14,13 +14,13 @@ Inside your `elif` clause, replace `pass` with a call to the `_insert` method on
 You should call the `self._insert()` method passing `node.right` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the right attribute (`node.right`) of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
index 12c2c98228e..d3bc3f3b948 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
@@ -25,7 +25,7 @@ You should call the `_search` method within the `search` method.
 You should call the `_search` method passing `self.root` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
index 537ab17d873..b9d700ea1ff 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
@@ -14,7 +14,7 @@ Now, make the `search` method return the result of the `_search()` call.
 You should prepend the `return` statement to your `_search()` call.
 
 ```js
-({ test: () => assert.match(code, /return\s+self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /return\s+self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
index a8bb89fcd97..d18f5d316b8 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
@@ -22,8 +22,8 @@ assert.match(after_split, /if\s+key\s+<\s+node\.key/);
 
 You should return `self._search(node.left, key)` from your new `if` block.
 
-```js    
-({ test: () => assert.match(code, /return\s+self\._search\(node\.left,\s*key\)/) });    
+```js
+({ test: () => assert.match(code, /return\s+self\._search\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
index 89319adff27..438cbd9aa1e 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
@@ -25,14 +25,14 @@ assert.match(after_split, /self\._search/);
 You should pass two arguments to the call of the `_search` method: `node.right` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should return the result of the `_search` method call.
 
 ```js
 ({
-  test: () => assert.match(code, /return\s+self\._search\(node\.right,\s*key\)/)
+  test: () => assert.match(code, /return\s+self\._search\(\s*node\.right,\s*key\s*\)/)
 });
 ```
 
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
index bb69a493b21..c7c9348f79b 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
@@ -18,7 +18,7 @@ Within the `BinarySearchTree` class, define a `delete` method. It takes two para
 You should define a `delete` method with two parameters: `self` and `key`. Remember to use `pass`.
 
 ```js
-({ test: () => assert.match(code, /def\s+delete\(self,\s*key\)/) });
+({ test: () => assert.match(code, /def\s+delete\(\s*self,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
index abb5a5173cf..0295e0b9974 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
@@ -14,7 +14,7 @@ Inside the `delete` method, delete `pass` and call the private helper method `_d
 Your `delete` method should call the `_delete` method with two arguments: `self.root` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
index 5a9faa2d592..d8af099d9a6 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
@@ -16,7 +16,7 @@ To handle this case, assign the result of the `_delete` call to `self.root`.
 You should assign the result of the `_delete()` call to `self.root`.
 
 ```js
-({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
index a86a307f752..ecb63ea01c0 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
@@ -14,7 +14,7 @@ Inside the `BinarySearchTree` class, define a new helper method called `_delete`
 You should define the `_delete` method inside the `BinarySearchTree` class with the parameters `self`, `node` and `key`. Remember to use the `pass` keyword.
 
 ```js
-assert.match(code, /def\s+_delete\(self,\s*node,\s*key\)/);
+assert.match(code, /def\s+_delete\(\s*self,\s*node,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
index 04645a3f7b9..2877639b041 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
@@ -14,13 +14,13 @@ Within the `if` block, replace `pass` with a call to the `_delete` method, passi
 You should call the `_delete` method with `node.left` and the `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to the left child (`node.left`) of the current node.
 
 ```js
-assert.match(code, /node\.left\s*=\s*self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /node\.left\s*=\s*self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
index 9487e2e3da8..a06501666da 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
@@ -23,13 +23,13 @@ assert.match(after_split, /elif\s+key\s+>\s+node\.key/);
 You should call the `_delete` method with `node.right` and `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to `node.right`.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
index cab34292eb4..ea5d08cf2dc 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
@@ -20,7 +20,7 @@ For now, add a `_min_value` call after your `elif` block, passing `node.right` a
 You should assign `self._min_value(node.right)` to `node.key` after your `elif` block.
 
 ```js
-assert.match(code, /node\.key\s*=\s*self\._min_value\(node\.right\)/);
+assert.match(code, /node\.key\s*=\s*self\._min_value\(\s*node\.right\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
index 1450075b00a..63323171ef2 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
@@ -22,7 +22,7 @@ assert.match(code, /self\._delete\(\s*node\.right\s*,\s*node\.key\s*/);
 You should assign the return value of the `_delete()` call to the right child of the current node.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right\,\s*node\.key/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right\,\s*node\.key/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
index da090f7fbb8..ab0a2d82755 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
@@ -16,7 +16,7 @@ This will start the traversal from the root of the binary search tree (`self.roo
 You should call `_inorder_traversal` and pass `self.root` and `result` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._inorder_traversal\(self\.root,\s*result\)/) })
+({ test: () => assert.match(code, /self\._inorder_traversal\(\s*self\.root,\s*result\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
index d2c4fd4b850..785e4e236c1 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
@@ -14,7 +14,7 @@ Define the `_inorder_traversal` method and give it three parameters: `self`, `no
 You should define a method `_inorder_traversal` that takes three parameters: `self`, `node`, and `result`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+_inorder_traversal\(self,\s*node,\s*result\)/);
+assert.match(code, /def\s+_inorder_traversal\(\s*self,\s*node,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
index 3e6cc600849..9d3eebf1ea4 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
@@ -20,7 +20,7 @@ assert.match(code, /if\s+node:/);
 You should call `_inorder_traversal` on the `node.left` inside the `if` block.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.left\s*,\s*result\s*\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.left\s*,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
index 206c8de3c93..3272136ad16 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
@@ -14,7 +14,7 @@ Still inside the `if` block, append the `key` of the current node to the `result
 You should append `node.key` to the `result` list.
 
 ```js
-assert.match(code, /result\.append\(node\.key\)/);
+assert.match(code, /result\.append\(\s*node\.key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
index 4f4ed672c87..c5c665f5ace 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
@@ -16,13 +16,13 @@ Create an instance of the `BinarySearchTree` class and assign it to the variable
 You should create an instance of the `BinarySearchTree` class.
 
 ```js
-assert.match(code, /BinarySearchTree\(\)/);
+assert.match(code, /BinarySearchTree\(\s*\)/);
 ```
 
 You should assign the new instance of `BinarySearchTree` to the variable `bst`.
 
 ```js
-assert.match(code, /bst\s*=\s*BinarySearchTree\(\)/);
+assert.match(code, /bst\s*=\s*BinarySearchTree\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
index 44bacaee044..55116cdc610 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
@@ -20,7 +20,7 @@ assert.match(code, /nodes/);
 Your `node` variable should have the value `[50, 30, 20, 40, 70, 60, 80]`.
 
 ```js
-assert.match(code, /nodes\s*=\s*\[50,\s*30,\s*20,\s*40,\s*70,\s*60,\s*80\]/);
+assert.match(code, /nodes\s*=\s*\[\s*50\s*,\s*30\s*,\s*20\s*,\s*40\s*\s*,\s*70\s*,\s*60\s*,\s*80\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
index 8f9b911b4ce..1351a787f19 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
@@ -16,7 +16,7 @@ This recursive call explores the entire right subtree in an in-order manner.
 You should call `_inorder_traversal` passing `node.right` and `result` as the arguments.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.right,\s*result\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.right,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
index 89597acba5f..958cc49b775 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
@@ -16,7 +16,7 @@ To change that to print a useful value, define another method named `__str__` in
 You should define a method `__str__` that takes a single argument `self`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+__str__\(self\)/);
+assert.match(code, /def\s+__str__\(\s*self\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
index 4e52d0ae95f..59f8df01f23 100644
--- a/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
+++ b/curriculum/challenges/swahili/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
@@ -14,7 +14,7 @@ In the body of the `__str__` method, delete `pass` and return the result of call
 You should return the string value of `self.key` from your `__str__` method.
 
 ```js
-({ test: () => assert.match(code, /^\s{8}return\s+str\(self\.key\)/m) })
+({ test: () => assert.match(code, /^\s{8}return\s+str\(\s*self\.key\s*\)/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md b/curriculum/challenges/swahili/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
index 521b01fa847..393bfcb062b 100644
--- a/curriculum/challenges/swahili/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
+++ b/curriculum/challenges/swahili/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
@@ -13,16 +13,12 @@ Hongera! Umekamilisha sehemu ya mwisho ya mradi wa mazoezi ya _Registration Form
 
 # --hints--
 
-Unapaswa kutumia kipengele kichaguzi cha `a`.
-
-```js
-assert.exists(new __helpers.CSSHelp(document).getStyle('a'));
-```
 
 Unapaswa kuvipa kipengele cha `a` `color` ya `#dfdfe2`.
 
 ```js
-assert.equal(new __helpers.CSSHelp(document).getStyle('a')?.color, 'rgb(223, 223, 226)');
+const linkElement = document.querySelector("a");
+assert.equal(window.getComputedStyle(linkElement)?.color, 'rgb(223, 223, 226)');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
index 09412cc3a31..0ea718d968a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
@@ -10,11 +10,9 @@ dashedName: build-a-cash-register
 
 Here you'll build a cash register app that will return change to the customer based on the price of the item, the amount of cash provided by the customer, and the amount of cash in the cash drawer. You'll also need to show different messages to the user in different scenarios, such as when the customer provides too little cash or when the cash drawer doesn't have enough to issue the correct change.
 
-There are a few variables you'll need to use in your code:
+In the `script.js` file, you have been provided with the `price` and `cid` variables. The `price` variable is the price of the item, and the `cid` variable is the cash-in-drawer, which is a 2D array listing the available currency in the cash drawer.
 
-- `price`: the price of the item as a floating point number.
-- `cash`: the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
-- `cid`: cash-in-drawer, a 2D array listing available currency in the cash drawer.
+The other variable you will need add is the `cash` variable, which is the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
 
 If you'd like to test your application with different values for `price` and `cid`, make sure to declare them with the `let` keyword so they can be reassigned by our tests.
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
index fe6f43c6855..94c0f6cce14 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
@@ -28,10 +28,10 @@ In this project, you'll build an app that will search for Pokémon by name or ID
 1. You should have an element with an `id` of `special-defense`
 1. You should have an element with an `id` of `speed`
 1. When the `#search-input` element contains the value `Red` and the `#search-button` element is clicked, an alert should appear with the text `Pokémon not found`
-1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
+1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the `#types` element should contain a single inner element with the value `ELECTRIC`. The `#types` element content should be cleared between searches
-1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
+1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed`elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, you should add an `img` element with the `id` of `sprite` and the `src` set to the Pokémon's `front_default` sprite to the page
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the `#types` element should contain two inner elements with the text values `GHOST` and `POISON`, respectively. The `#types` element content should be cleared between searches
 
@@ -158,7 +158,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
+When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
 
 ```js
 async () => {
@@ -251,7 +251,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
+When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
 
 ```js
 async () => {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
index f42de6f261d..d06f8eca1ad 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
@@ -11,7 +11,7 @@ Now that you have the value of the input, you need to split it into an array of
 
 The `.split()` method takes a string and splits it into an array of strings. You can pass it a string of characters or a RegEx to use as a separator. For example, `string.split(",")` would split the string at each comma and return an array of strings.
 
-Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces seperating your values. Store the array in an `array` variable.
+Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces separating your values. Store the array in an `array` variable.
 
 # --hints--
 
@@ -36,7 +36,7 @@ assert.match(code.toString(),  /array\s*=\s*value\.split()/);
 You should use `/,\s*/g` for the `split()` method's separator.
 
 ```js
-assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\)/);
+assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
index 6b40fb68ca7..bbaa4e90f7a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
@@ -22,7 +22,7 @@ assert.match(calculate.toString(), /numbers/);
 You should use the `.map()` method on your `array` variable.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\)/);
+assert.match(calculate.toString(), /array\.map\(\s*\)/);
 ```
 
 You should assign the result of your `.map()` call to your `numbers` variable.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
index 446557a50bb..59cfa29b150 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
@@ -24,7 +24,7 @@ Add a callback function to your `.map()` method that converts each element to a
 Your `.map()` method should have a callback function which takes an `el` parameter.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use the `Number` constructor to convert `el` to a number.
@@ -42,7 +42,7 @@ assert.notMatch(calculate.toString(), /new/);
 Your callback function should return the element converted to a number.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
index 1be44480ef0..45799061185 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
@@ -24,13 +24,13 @@ assert.match(calculate.toString(), /filtered/);
 Your `calculate` function should use the `.filter()` method on the `numbers` array.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\)/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*\)/)
 ```
 
 You should assign the result of `numbers.filter()` to the `filtered` variable.
 
 ```js
-assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\)/);
+assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
index 3de4519268d..7a1e48b79f9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
@@ -26,7 +26,7 @@ Add a callback function to your `.filter()` method that returns `true` if the el
 Your `.filter()` method should have a callback which accepts `el` as a parameter.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use `!` and `isNaN()` to check if `el` is NOT `NaN`.
@@ -38,7 +38,7 @@ assert.match(calculate.toString(), /!\s*(Number\.)?isNaN\(\s*el\s*\)/);
 Your callback function should return elements that are not `NaN`.
 
 ```js
-assert.match(calculate.toString(), /(numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
index d3aedd0c70c..6585a650dcd 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
@@ -28,20 +28,19 @@ assert.notMatch(calculate.toString(), /filtered/);
 You should chain your `.filter()` call to your `.map()` call.
 
 ```js
-console.log(calculate.toString());
 assert.match(calculate.toString(), /array\.map\(.*\)\.filter\(/s);
 ```
 
 You should not remove the `.map()` callback.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 You should not remove the `.filter()` callback.
 
 ```js
-assert.match(calculate.toString(), /(\.filter\(\(?\s*el\s*\)?\s*=>|\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
+assert.match(calculate.toString(), /(\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
index 53fea17728d..f31db19c419 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
@@ -22,13 +22,13 @@ assert.match(getMean.toString(), /sum/);
 Your `getMean` function should use the `.reduce()` method of the `array` parameter.
 
 ```js
-assert.match(getMean.toString(), /array\.reduce\(\)/);
+assert.match(getMean.toString(), /array\.reduce\(\s*\)/);
 ```
 
 You should assign the result of `array.reduce()` to the `sum` variable.
 
 ```js
-assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\)/);
+assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
index 019ed4cd437..3240a9838b9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
@@ -22,13 +22,13 @@ For your `sum` variable, pass a callback to `.reduce()` that takes the accumulat
 Your `reduce` method should have a callback function which takes an `acc` and an `el` parameters.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)/)
 ```
 
 Your `reduce` method should return the sum of `acc` and `el`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
index 10d3cb55efb..2d8207ac0af 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
@@ -22,7 +22,7 @@ Set the initial value of the accumulator to `0`.
 Your `reduce` method should have `0` as the initial value.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
index 5d348adefa5..9ac0843b04f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
@@ -28,19 +28,19 @@ assert.notMatch(getMean.toString(), /mean\s*=/);
 You should not change the logic within the `reduce` method.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 You should divide the result of the `reduce` method by the length of the array.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)\s*\/\s*array\.length/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 You should use implicit return syntax to directly return the result of `reduce` divided by the array length.
 
 ```js
-assert.match(code, /const\s+getMean\s*=\s*\(?array\)?\s*=>\s*array\.reduce\(\(acc\s*,\s*el\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
+assert.match(code, /const\s+getMean\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
index 80a9d55a83e..7236732f615 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
@@ -18,13 +18,13 @@ To sort your numbers from smallest to largest, pass a callback function that tak
 Your `sort` method should have a callback function which takes an `a` and a `b` parameters.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)/)
 ```
 
 Your `sort` method should return the result of subtracting `b` from `a`.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
index 838b5d9cbfa..17d8f2ff795 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
@@ -34,13 +34,13 @@ assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0
 If `array.length` is even, pass an array with the two middle numbers from the `sorted` array to the `getMean` function. The first item in the array argument should be the value at index `array.length / 2` from `sorted` and the second should use the value at the index `array.length / 2 - 1` from `sorted`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:/);
 ```
 
 If the `array.length` is odd, your `median` variable should assign the middle number to the `median` variable. The middle number is the value of `sorted` at `Math.floor(array.length / 2)`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:\s*sorted\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\)\];/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:\s*sorted\s*\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\s*\)\s*\]\s*;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
index 85f055855ee..28928d3a49c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
@@ -22,13 +22,13 @@ assert.match(calculate.toString(), /median\s*=/);
 Your `median` variable should be assigned the value of `getMedian(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /median\s*=\s*getMedian\(numbers\)/);
+assert.match(calculate.toString(), /median\s*=\s*getMedian\(\s*numbers\s*\)/);
 ```
 
 Your `calculate` function should query the DOM for the `#median` element and set the `textContent` to `median`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#median\1\)\.textContent\s*=\s*median/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#median\1\s*\)\.textContent\s*=\s*median/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
index 1ebc8d2e78b..b5c50a82ca6 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
@@ -22,14 +22,13 @@ assert.match(getMode.toString(), /array\.forEach\(/);
 Your `.forEach()` method should have a callback function which takes an `el` parameter.
 
 ```js
-console.log(getMode.toString());
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)/);
 ```
 
 Your `.forEach()` method should increment the count for each number. Don't forget the fallback value.
 
 ```js
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)\s*\{?\s*(return)?\s*counts\[\s*el\s*\]\s*=\s*\(\s*counts\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)\s*\{?\s*(return)?\s*counts\s*\[\s*el\s*\]\s*=\s*\(\s*counts\s*\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
index 2eee1711e2c..f364934ac3b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
@@ -24,19 +24,19 @@ assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.so
 Your `getMode` function should pass a callback to the `sort` method with parameters `a` and `b`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)/)
 ```
 
 Your `getMode` function should use the `sort` method to sort the `Object.keys()` array and return the value of `counts[b]` minus the value of `counts[a]`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)/)
 ```
 
 Your `highest` variable should have the value of the first entry in the sorted `Object.keys(counts)` array.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)\[0\];/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)\s*\[\s*0\s*\]\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
index 8257fe0a3d1..ce5dee5e43e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
@@ -20,13 +20,13 @@ assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filte
 Your `.filter()` method should take a callback function with a parameter `el`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)/);
 ```
 
 Your `.filter()` method should return whether the value of `counts[el]` is equal to `counts[highest]`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\[\s*el\s*\]\s*===\s*counts\[\s*highest\s*\];\s*\}/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\s*\[\s*el\s*\]\s*===\s*counts\s*\[\s*highest\s*\]\s*;\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
index da56162ec1e..18d4411d8d9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /mode\s*=\s*getMode\(\s*numbers\s*\);/);
 Your `calculate` function should query the DOM for the `#mode` element and set the `textContent` to `mode`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#mode\1\)\.textContent\s*=\s*mode;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#mode\1\s*\)\.textContent\s*=\s*mode;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
index e7ecefa6abf..b30d5c2d7a6 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
@@ -12,7 +12,10 @@ Your next calculation is the <dfn>range</dfn>, which is the difference between t
 You previously learned about the global `Math` object. `Math` has a `.min()` method to get the smallest number from a series of numbers, and the `.max()` method to get the largest number. Here's an example that gets the smallest number from an array:
 
 ```js
-Math.min(1, 9, 11, -3, 0.5);
+const numbersArr = [2, 3, 1];
+
+console.log(Math.min(...numbersArr));
+// Expected output: 1
 ```
 
 Declare a `getRange` function that takes the same `array` parameter you have been using. Using `Math.min()`, `Math.max()`, and the spread operator, return the difference between the largest and smallest numbers in the list.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
index 0a76e4a262e..6ab86a40c09 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
@@ -14,13 +14,13 @@ Add the logic for calculating and displaying the range to your `calculate` funct
 Your `calculate` function should set a `range` variable to the result of `getRange(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /range\s*=\s*getRange\(numbers\);/);
+assert.match(calculate.toString(), /range\s*=\s*getRange\(\s*numbers\s*\);/);
 ```
 
 Your `calculate` function should set the `#range` element's `textContent` to the `range` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#range\1\)\.textContent\s*=\s*range;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#range\1\s*\)\.textContent\s*=\s*range;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
index b4e1f9041b0..03b10eb0ec4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
@@ -26,13 +26,13 @@ assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(/);
 Your `differences` variable should use the `el` parameter in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Your `map` callback should return the value of `el` minus `mean`.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
index d9327c1636f..6cf6d9c5064 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
@@ -28,13 +28,13 @@ assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\
 Your `squaredDifferences` variable should use the `el` parameter in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Your `map` callback should return the value of `el` squared.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
 ```
 
 Your `map` callback should use the `**` operator.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
index 3eca91581bc..3a740bef971 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
@@ -28,14 +28,13 @@ assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDiffere
 Your `sumSquaredDifferences` variable should use the `acc` and `el` parameters in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Your `reduce` callback should return the sum of `acc` and `el`.
 
 ```js
-console.log(getVariance.toString());
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
index 58362c20e3e..271c56fcb33 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
@@ -46,19 +46,19 @@ assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(/);
 Your `variance` variable should use the `acc` and `el` parameters in the callback function.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Your `reduce` callback should be an empty function.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}/);
 ```
 
 Your `reduce` callback should have an initial value of `0`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}\s*,\s*0\s*\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
index 1a5e300608c..2e8a5c500d9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
@@ -14,37 +14,37 @@ Within your empty `.reduce()` callback, declare a variable `difference` and set
 Your `reduce` callback should have a `difference` variable.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=/);
 ```
 
 Your `difference` variable should be set to the value of `el` minus `mean`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
 ```
 
 Your `reduce` callback should have a `squared` variable.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
 ```
 
 Your `squared` variable should be set to the value of `difference` to the power of 2.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
 ```
 
 Your `reduce` callback should return the value of `acc` plus `squared`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
 ```
 
 You should not remove the initial value of `0` from your `.reduce()` method.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
index cde4691c7e3..b7a1c2c46a9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
@@ -16,7 +16,7 @@ Divide your `.reduce()` call by the length of the array (in your `variance` decl
 You should divide the result of the `.reduce()` call by the length of the array.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)\s*\/\s*array\.length;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)\s*\/\s*array\.length;/);
 ```
 
 You should return the value of `variance`.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
index 9a7d6042e32..306c71f566c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /variance\s*=\s*getVariance\(\s*numbers\s*\)/
 You should set the `textContent` of the `#variance` element to the value of the `variance` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#variance\1\)\.textContent\s*=\s*variance/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#variance\1\s*\)\.textContent\s*=\s*variance/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
index f2bcca5a4c5..d3556a99af0 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
@@ -14,13 +14,13 @@ Now update the `calculate` function to include the standard deviation logic, lik
 Your `calculate` function should have a `standardDeviation` variable set to the result of `getStandardDeviation(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(numbers\)/);
+assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(\s*numbers\s*\)/);
 ```
 
 You should update the `textContent` of the `#standardDeviation` element to be the `standardDeviation` variable.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#standardDeviation\1\)\.textContent\s*=\s*standardDeviation/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#standardDeviation\1\s*\)\.textContent\s*=\s*standardDeviation/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
index 889f7d937a6..1ce2b4e6e2d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
@@ -16,19 +16,19 @@ To fix this, add an empty `.slice()` call before your `.sort()` method. The empt
 You should call `.slice()` on the `array` parameter.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)/);
 ```
 
 Your `.sort()` call should be chained to the `.slice()` call.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(/);
 ```
 
 You should not modify the `.sort()` method callback.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
index b8c2334fc96..73c6442ab83 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
@@ -24,7 +24,7 @@ Use the `async` keyword to create an asynchronous arrow function called `fetchDa
 You should use the `async` keyword to create an asynchronous arrow function called `fetchData`.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*[^}]*\s*}/);
 ```
 
 `fetchData` should be defined.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
index 1266449024f..5d700a1b532 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
@@ -37,7 +37,7 @@ assert.match(code, /\s*const\s+res\s*=\s*await\s+fetch\(\s*(.*)\s*\)/);
 You should pass in the `forumLatest` constant to the `fetch` call.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
index 7f79fbdb6db..c7dea4cc781 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+data/);
 You should assign `await res.json()` to the `data` variable.
 
 ```js
-assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\);?\s*/);
+assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
index 481ef4890bf..637a00b87c8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
@@ -28,7 +28,7 @@ assert.match(code, /\s*try\s*{[\s\S]*\s*console\.log\(\s*data\s*\)[\s\S]*}\s*cat
 You should call the `fetchData()` function, after the `fetchData()` function is defined.
 
 ```js
-assert.match(code, /};?\s*fetchData\(\)/);
+assert.match(code, /};?\s*fetchData\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
index 3ab45dc7fa3..44cabb1c8fd 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
@@ -22,7 +22,7 @@ assert.match(code, /\s*showLatestPosts\(.*\);??\s*/);
 You should pass `data` as the argument to `showLatestsPosts()`.
 
 ```js
-assert.match(code, /\s*showLatestPosts\(data\);?\s*/);
+assert.match(code, /\s*showLatestPosts\(\s*data\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
index 14d30c3a1f9..41eb94db9fd 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
@@ -20,7 +20,7 @@ assert.match(code, /\s*const\s+thousands\s*=/);
 Your should assign `Math.floor(views / 1000)` to your `thousands` variable.
 
 ```js
-assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(views\s*\/\s*1000\)\s*/);
+assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(\s*views\s*\/\s*1000\s*\)\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
index 1b93d92bc90..a506ac164e1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
@@ -14,7 +14,7 @@ Inside the `if` statement, destructure `className` and `category` from the `allC
 You should destructure `className` and `category` from the `allCategories[id]` object. The properties can be in any order.
 
 ```js
-assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\[id\]\s*/g));
+assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\s*\[\s*id\s*\]\s*/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
index 103c9ce1133..f09d7ffc664 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
@@ -27,19 +27,19 @@ Inside your `fetchData` function, add a `try...catch` statement. The `catch` blo
 You should have a `try` block inside your `fetchData` function.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
 ```
 
 You should have a `catch` block after your `try` block.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
 ```
 
 Your `catch` block should have an `err` parameter.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
 ```
 
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
index 799ad7094d3..a62cb902bf2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+postsContainer\s*=/);
 You should use `document.getElementById()` to get the `#posts-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)posts-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/);
 ```
 
 You should assign the `#posts-container` element to your `postsContainer` variable.
 
 ```js
-assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(('|"|`)posts-container\1\)/g));
+assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
index eac27fcf94d..3fab2eb575a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
@@ -14,7 +14,7 @@ You will be using this as an event listener for the `sortButton`. Because button
 Your `sortInputArray` function should call `event.preventDefault()`.
 
 ```js
-assert.match(sortInputArray.toString(), /event\.preventDefault\(\)/);
+assert.match(sortInputArray.toString(), /event\.preventDefault\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
index 2ad51e90182..84e1be0bc98 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*
 You should assign `temp` the value of `array[j]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?/);
 ```
 
 You should assign `array[j]` the value of `array[j + 1]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?/);
 ```
 
 You should assign `array[j + 1]` the value of `temp`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
index b882ede249d..27ab3474c24 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished executing, return the sorted array.
 You should `return` the `array` variable.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
index 2ceede3cd14..01d82b0288b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
@@ -17,7 +17,7 @@ You should remove your `console.log()` call.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(bubbleSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(bubbleSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
index d77638a3fef..c7d45c144ec 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{
 You should assign `array[i]` to `temp`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]/)
 ```
 
 You should assign `array[minIndex]` to `array[i]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]/)
 ```
 
 You should assign `temp` to `array[minIndex]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
index 25c96ed40cf..a0697aa022d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished, you need to return the array. Once
 You should `return` the `array` after your outer loop completes.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
index 5aa739b5ee5..01770cd73ea 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
@@ -15,7 +15,7 @@ You should remove the `console.log()` statement from `selectionSort()`.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(selectionSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(selectionSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
index d3f3ddfb3f7..54fdb7faca9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
@@ -16,7 +16,7 @@ Do so by assigning the value at the `j` index to the next index.
 Before decrementing `j`, assign the value at `j` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
index fde3af26ddb..ac8e5106b3f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
@@ -16,7 +16,7 @@ Use the assignment operator to insert your current value into the correct index.
 You should assign `currValue` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
+assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
index ac17e056fb4..1423bd00f8a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
@@ -14,7 +14,7 @@ After your `for` loop has finished, you need to return the array. You should the
 You should `return` the `array`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
index bcaf6e2c15f..bec6320b07b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
@@ -11,7 +11,7 @@ One of the most powerful tools is your developer console. Depending on your brow
 
 The developer console will include errors that are produced by your code, but you can also use it to see values of variables in your code, which is helpful for debugging.
 
-Add a `console.log("Hello World");` line between your `script` tags. Then click the "Console" button to open the console. You should see the text `Hello World`.
+Add a `console.log("Hello World");` line between your `script` tags. Then click the "Console" button to open the console. You should see the text `"Hello World"`.
 
 Note how the line ends with a semi-colon. It is common practice in JavaScript to end your code lines with semi-colons.
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
index 6888e2d503d..cd71ce38d39 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
@@ -10,10 +10,10 @@ dashedName: step-7
 Variables can be <dfn>assigned</dfn> a value. When you do this while you declare it, this is called <dfn>initialization</dfn>. For example:
 
 ```js
-let camperbot = "Bot";
+let age = 32;
 ```
 
-This would initialize the `camperbot` variable with a value of `Bot`, a string.
+This would initialize the `age` variable with a value of `32`, a number.
 
 Initialize your `xp` variable to have a value of `0`, a number.
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
index 103ebd23d09..48a8d9b717f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
@@ -15,7 +15,7 @@ let order = ["first", "second", "third"];
 
 This is an array which holds three values. Notice how the values are separated by commas.
 
-Change your `inventory` variable to be an array with the strings `stick`, `dagger`, and `sword`.
+Change your `inventory` variable to be an array with the strings `"stick"`, `"dagger"`, and `"sword"`.
 
 # --hints--
 
@@ -31,19 +31,19 @@ Your `inventory` variable should have three values.
 assert.lengthOf(inventory, 3);
 ```
 
-Your `inventory` variable should include the string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
 ```
 
-Your `inventory` variable should include the string `dagger`.
+Your `inventory` variable should include the string `"dagger"`.
 
 ```js
 assert.include(inventory, "dagger");
 ```
 
-Your `inventory` variable should include the string `sword`.
+Your `inventory` variable should include the string `"sword"`.
 
 ```js
 assert.include(inventory, "sword");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
index a352759a898..0063b272044 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-For now, you want the player to start with just the `stick`. Change the `inventory` array to have `stick` as its only value.
+For now, you want the player to start with just the `"stick"`. Change the `inventory` array to have `"stick"` as its only value.
 
 # --hints--
 
@@ -23,7 +23,7 @@ Your `inventory` variable should only have one value.
 assert.lengthOf(inventory, 1);
 ```
 
-Your `inventory` variable should include the string `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
index 03628359b55..08cc5d2d9f2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
@@ -33,10 +33,10 @@ You should use `document.querySelector()`.
 assert.match(code, /document\.querySelector/);
 ```
 
-You should use the `#button1` selector.
+You should use the `"#button1"` selector.
 
 ```js
-assert.match(code, /querySelector\(('|")#button1\1\)/);
+assert.match(code, /querySelector\(\s*('|")#button1\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
index 6de39d30487..de8fa827323 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
@@ -9,12 +9,14 @@ dashedName: step-40
 
 `button1` represents your first `button` element. These elements have a special property called `onclick`, which you can use to determine what happens when someone clicks that button.
 
-You can access properties in JavaScript a couple of different ways. The first is with <dfn>dot notation</dfn>. Accessing the `onclick` property of a button would look like:
+You can access properties in JavaScript a couple of different ways. The first is with <dfn>dot notation</dfn>. Here is an example of using dot notation to set the `onclick` property of a button to a function reference.
 
 ```js
-button.onclick
+button.onclick = myFunction;
 ```
 
+In this example, `button` is the button element, and `myFunction` is a reference to a function. When the button is clicked, `myFunction` will be called.
+
 Use dot notation to set the `onclick` property of your `button1` to the function reference of `goStore`. Note that `button1` is already declared, so you don't need to use `let` or `const`.
 
 # --hints--
@@ -31,10 +33,10 @@ You should not use `let` or `const`.
 assert.notMatch(code, /(let|const)\s+button1\.onclick/);
 ```
 
-You should assign the `goStore` function reference to `button1.onclick`.
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button1\.onclick\s*=\s*goStore/);
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
index ff545796e22..25ea3695de4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
@@ -13,6 +13,12 @@ Once you have done that, open your console and try clicking the buttons on your
 
 # --hints--
 
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
+
+```js
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
+```
+
 You should use dot notation to access the `onclick` property of `button2`.
 
 ```js
@@ -25,10 +31,10 @@ You should not use `let` or `const` to assign `button2.onclick`.
 assert.notMatch(code, /(let|const)\s+button2\.onclick/);
 ```
 
-You should set the `onclick` property of `button2` to the variable `goCave`.
+You should assign the `goCave` function reference to `button2.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button2\.onclick\s*=\s*goCave/);
+assert.match(code, /button2\.onclick\s*=\s*goCave\s*;?\s*$/m);
 ```
 
 You should use dot notation to access the `onclick` property of `button3`.
@@ -43,10 +49,10 @@ You should not use `let` or `const` to assign `button3.onclick`.
 assert.notMatch(code, /(let|const)\s+button3\.onclick/);
 ```
 
-You should set the `onclick` property of `button3` to the variable `fightDragon`.
+You should assign the `fightDragon` function reference to `button3.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button3\.onclick\s*=\s*fightDragon/);
+assert.match(code, /button3\.onclick\s*=\s*fightDragon\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
index 6c0c17b8589..7cc4122e824 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-For now, make your `goStore` function output the message `Going to store.` to the console. For example, here is a function that outputs the message `Hello World`.
+For now, make your `goStore` function output the message `"Going to store."` to the console. For example, here is a function that outputs the message `"Hello World"`.
 
 ```js
 function functionName() {
@@ -20,13 +20,13 @@ function functionName() {
 You should have a `console.log("Going to store.");` line in your code. Don't forget the semi-colon.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to store\.\1\);/);
+assert.match(code, /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 Your `console.log("Going to store.");` line should be in your `goStore` function.
 
 ```js
-assert.match(goStore.toString(), /console\.log\(('|")Going to store\.\1\);/);
+assert.match(goStore.toString(), /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
index ef8bfd7c627..1d74de7d110 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
@@ -7,7 +7,7 @@ dashedName: step-37
 
 # --description--
 
-Now create a `goCave` function that prints `Going to cave.` to the console.
+Now create a `goCave` function that prints `"Going to cave."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(goCave);
 You should have a `console.log("Going to cave.");` line in your code.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 Your `console.log("Going to cave.");` line should be inside your `goCave` function.
 
 ```js
-assert.match(goCave.toString(), /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(goCave.toString(), /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
index 070242e7ea2..b738ccbcb86 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
@@ -7,7 +7,7 @@ dashedName: step-38
 
 # --description--
 
-Now create a `fightDragon` function that prints `Fighting dragon.` to the console.
+Now create a `fightDragon` function that prints `"Fighting dragon."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(fightDragon);
 You should have a `console.log("Fighting dragon.");` line in your code.
 
 ```js
-assert.match(code, /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 Your `console.log("Fighting dragon.");` line should be inside your `fightDragon` function.
 
 ```js
-assert.match(fightDragon.toString(), /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(fightDragon.toString(), /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
index 2e9629161ae..f85fb642a6f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
@@ -9,21 +9,25 @@ dashedName: step-42
 
 The `innerText` property controls the text that appears in an HTML element. For example:
 
-```js
-const info = document.querySelector("#info");
-info.innerText = "Hello World";
+```html
+<p id="info">Demo content</p> 
 ```
 
-This code would change the element assigned to the `info` variable to have the text `Hello World`.
+```js
+const info = document.querySelector("#info"); 
+info.innerText = "Hello World"; 
+```
 
-When a player clicks your `Go to store` button, you want to change the buttons and text. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `Buy 10 health (10 gold)`.
+The following example would change the text of the `p` element from `Demo content` to `Hello World`.
+
+When a player clicks your `Go to store` button, you want to change the buttons and text. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `"Buy 10 health (10 gold)"`.
 
 # --hints--
 
 You should not have a `console.log("Going to store.");` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(('|")Going to store\.\1\)/);
+assert.notMatch(code, /console\.log\(\s*('|")Going to store\.\1\s*\)/);
 ```
 
 You should use dot notation to access the `innerText` property of `button1`.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
index 9b48351056c..f615e671b64 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, add a line that updates the text of `button2` to say `Buy weapon (30 gold)` and update the text of `button3` to say `Go to town square`.
+Now, add a line that updates the text of `button2` to say `"Buy weapon (30 gold)"` and update the text of `button3` to say `"Go to town square"`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button2\.innerText/);
 ```
 
-You should update the `innerText` property of `button2` to be `Buy weapon (30 gold)`.
+You should update the `innerText` property of `button2` to be `"Buy weapon (30 gold)"`.
 
 ```js
 assert.match(code, /button2\.innerText\s*=\s*('|")Buy weapon \(30 gold\)\1/);
@@ -47,7 +47,7 @@ You should not use `let` or `const` to access the `innerText` property of `butto
 assert.notMatch(code, /(let|const)\s+button3\.innerText/);
 ```
 
-You should update the `innerText` property of `button3` to be `Go to town square`.
+You should update the `innerText` property of `button3` to be `"Go to town square"`.
 
 ```js
 assert.match(code, /button3\.innerText\s*=\s*('|")Go to town square\1/);
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
index d4486e102b1..af42ae7d390 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Now you need to modify your display text. Change the `innerText` property of the `text` to be `You enter the store.`.
+Now you need to modify your display text. Change the `innerText` property of the `text` to be `"You enter the store."`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should not use `let` or `const` to access the `innerText` property of `text`
 assert.notMatch(code, /(let|const)\s+text\.innerText/);
 ```
 
-You should update the `innerText` property of `text` to be `You enter the store.`.
+You should update the `innerText` property of `text` to be `"You enter the store."`.
 
 ```js
 assert.match(code, /text\.innerText\s*=\s*('|")You enter the store.\1/);
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
index 6d795bb12e7..7545401b668 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
@@ -7,25 +7,25 @@ dashedName: step-48
 
 # --description--
 
-In your `goTown` function, change your `button` elements' `innerText` properties to be `Go to store`, `Go to cave`, and `Fight dragon`. Update your `onclick` properties to be `goStore`, `goCave`, and `fightDragon`, respectively.
+In your `goTown` function, change your `button` elements' `innerText` properties to be `"Go to store"`, `"Go to cave"`, and `"Fight dragon"`. Update your `onclick` properties to be `goStore`, `goCave`, and `fightDragon`, respectively.
 
-Finally, update `innerText` property of your `text` to be `You are in the town square. You see a sign that says Store.`.
+Finally, update `innerText` property of your `text` to be `"You are in the town square. You see a sign that says Store."`.
 
 # --hints--
 
-You should set the `button1.innerText` property to be `Go to store` in your `goTown` function.
+You should set the `button1.innerText` property to be `"Go to store"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-You should set the `button2.innerText` property to be `Go to cave` in your `goTown` function.
+You should set the `button2.innerText` property to be `"Go to cave"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-You should set the `button3.innerText` property to be `Fight dragon` in your `goTown` function.
+You should set the `button3.innerText` property to be `"Fight dragon"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -49,7 +49,7 @@ You should set the `button3.onclick` property to be `fightDragon` in your `goTow
 assert.match(goTown.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-You should set the `text.innerText` property to be `You are in the town square. You see a sign that says Store.` in your `goTown` function.
+You should set the `text.innerText` property to be `"You are in the town square. You see a sign that says Store."` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /text\.innerText\s*=\s*('|")You are in the town square. You see a sign that says Store\.\1/);
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
index ae5fc250b14..4df50067a58 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
@@ -28,7 +28,7 @@ assert.match(code, /function\s+update/);
 Your `update` function should take a parameter called `location`.
 
 ```js
-assert.match(update.toString(), /update\(location\)/);
+assert.match(update.toString(), /update\(\s*location\s*\)/);
 ```
 
 Your `update` function should be empty.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
index 31383f90906..45d4085b487 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. For example, here is an object with a key of `name` set to `Quincy Larson`.
+Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is the name of the property (or the key), and `value` is the value that property holds. For example, here is an object with a key of `name` set to `"Quincy Larson"`.
 
 ```js
 {
@@ -15,7 +15,7 @@ Object <dfn>properties</dfn> are written as `key: value` pairs, where `key` is t
 }
 ```
 
-Add a `name` property to your empty object and give it a value of `town square`.
+Add a `name` property to your empty object and give it a value of `"town square"`.
 
 # --hints--
 
@@ -31,7 +31,7 @@ Your first value of `locations` should have a `name` property.
 assert.isDefined(locations[0].name);
 ```
 
-Your first value of `locations` should have a `name` property with a value of `town square`.
+Your first value of `locations` should have a `name` property with a value of `"town square"`.
 
 ```js
 assert.equal(locations[0].name, "town square");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
index d723486850a..a584e79ad1d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
@@ -25,19 +25,19 @@ assert.isString(locations[0]["button text"][1]);
 assert.isString(locations[0]["button text"][2]);
 ```
 
-The first value in the `button text` array should be "Go to store".
+The first value in the `button text` array should be `"Go to store"`.
 
 ```js
 assert.equal(locations[0]["button text"][0], "Go to store");
 ```
 
-The second value in the `button text` array should be "Go to cave".
+The second value in the `button text` array should be `"Go to cave"`.
 
 ```js
 assert.equal(locations[0]["button text"][1], "Go to cave");
 ```
 
-The third value in the `button text` array should be "Fight dragon".
+The third value in the `button text` array should be `"Fight dragon"`.
 
 ```js
 assert.equal(locations[0]["button text"][2], "Fight dragon");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
index aae82bea228..367eb7a084a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
@@ -23,7 +23,7 @@ Your `text` property should be a string.
 assert.isString(locations[0]["text"]);
 ```
 
-Your `text` property should have the value `You are in the town square. You see a sign that says \"Store\".`
+Your `text` property should have the value `"You are in the town square. You see a sign that says \"Store\"."`
 
 ```js
 assert.equal(locations[0]["text"], "You are in the town square. You see a sign that says \"Store\".");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
index 43f7673495b..e2b9b9fc59b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
@@ -37,7 +37,7 @@ Your second `locations` object should have a `button text` property which is an
 assert.isArray(locations[1]["button text"]);
 ```
 
-Your `button text` property should have the string values `Buy 10 health (10 gold)`, `Buy weapon (30 gold)`, and `Go to town square`.
+Your `button text` property should have the string values `"Buy 10 health (10 gold)"`, `"Buy weapon (30 gold)"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[1]["button text"][0], "Buy 10 health (10 gold)");
@@ -65,7 +65,7 @@ Your second `locations` object should have a `text` property which is a string.
 assert.isString(locations[1].text);
 ```
 
-Your second `locations` object should have a `text` property with the value of `You enter the store.`.
+Your second `locations` object should have a `text` property with the value of `"You enter the store."`.
 
 ```js
 assert.equal(locations[1].text, "You enter the store.");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
index cda502fd8c9..1d7e7b664cb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
@@ -11,19 +11,19 @@ Now you can consolidate some of your code. Start by copying the code from inside
 
 # --hints--
 
-Your `update` function should set `button1.innerText` to `Go to store`.
+Your `update` function should set `button1.innerText` to `"Go to store"`.
 
 ```js
 assert.match(update.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-Your `update` function should set `button2.innerText` to `Go to cave`.
+Your `update` function should set `button2.innerText` to `"Go to cave"`.
 
 ```js
 assert.match(update.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-Your `update` function should set `button3.innerText` to `Fight dragon`.
+Your `update` function should set `button3.innerText` to `"Fight dragon"`.
 
 ```js
 assert.match(update.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -47,7 +47,7 @@ Your `update` function should set `button3.onclick` to `fightDragon`.
 assert.match(update.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-Your `update` function should set `text.innerText` to `You are in the town square. You see a sign that says \"Store\".`.
+Your `update` function should set `text.innerText` to `"You are in the town square. You see a sign that says \"Store\"."`.
 
 ```js
 assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town square. You see a sign that says \\"Store\\"\."/);
@@ -56,13 +56,13 @@ assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town squa
 Your `goTown` function should be empty.
 
 ```js
-assert.match(goTown.toString(), /function goTown\(\) \{\}/);
+assert.match(goTown.toString(), /function goTown\(\s*\) \{\}/);
 ```
 
 Your `goStore` function should be empty.
 
 ```js
-assert.match(goStore.toString(), /function goStore\(\) \{\}/);
+assert.match(goStore.toString(), /function goStore\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
index 8dede9d8e21..1f2015b1bf7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
@@ -20,13 +20,13 @@ myFunction();
 You should call the `update` function in the `goTown` function.
 
 ```js
-assert.match(goTown.toString(), /update\(\)/);
+assert.match(goTown.toString(), /update\(\s*\)/);
 ```
 
 Don't forget your ending semi-colon.
 
 ```js
-assert.match(goTown.toString(), /update\(\);/);
+assert.match(goTown.toString(), /update\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
index 97acd2004ca..add0b668bf1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
@@ -20,7 +20,7 @@ Pass your `locations` array into the `update` call.
 You should pass the `locations` array into the `update` call.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
index 36d73d18fc3..a9571cfd83e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
@@ -7,7 +7,7 @@ dashedName: step-62
 
 # --description--
 
-The `locations` array contains two locations: the `town square` and the `store`. Currently you are passing that entire array into the `update` function.
+The `locations` array contains two locations: the `"town square"` and the `"store"`. Currently you are passing that entire array into the `update` function.
 
 Pass in only the first element of the `locations` array by adding `[0]` at the end of the variable. For example: `myFunction(arg[0]);`.
 
@@ -18,25 +18,25 @@ This is called <dfn>bracket notation</dfn>. Values in an array are accessed by i
 You should use bracket notation with `locations`.
 
 ```js
-assert.match(code, /locations\[/);
+assert.match(code, /locations\s*\[/);
 ```
 
 You should access the first object in the `locations` array. Remember that arrays are zero-based.
 
 ```js
-assert.match(code, /locations\[0\]/);
+assert.match(code, /locations\s*\[\s*0\s*\]/);
 ```
 
 You should pass the first object in the `locations` array into the `update` function.
 
 ```js
-assert.match(code, /update\(locations\[0\]\);/);
+assert.match(code, /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 This call should still be in your `goTown()` function.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\[0\]\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
index b457893428d..8955272413f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
@@ -9,20 +9,20 @@ dashedName: step-63
 
 Now your `update` function needs to use the argument you pass into it.
 
-Inside the `update` function, change the value of the `button1.innerText` assignment to be `location["button text"]`. That way, you use bracket notation to get the `button text` property of the `location` object passed into the function.
+Inside the `update` function, change the value of the `button1.innerText` assignment to be `location["button text"]`. That way, you use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 # --hints--
 
-Your `update` function should use bracket notation to get the `button text` property of the `location` object passed into the function.
+Your `update` function should use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 ```js
 assert.match(update.toString(), /location[('|")button text\1]/);
 ```
 
-You should assign the value of the `button text` property of the `location` object to the `innerText` property of `button1`.
+You should assign the value of the `"button text"` property of the `location` object to the `innerText` property of `button1`.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
index 59220a5d659..94390aeddb7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
@@ -7,20 +7,20 @@ dashedName: step-64
 
 # --description--
 
-`location["button text"]` is an array with three elements. Change the `button1.innerText` assignment to be the first element of that array instead.
+`location["button text"]` is an array with three elements. Change the `button1.innerText` assignment to be `location["button text"][0]` which represents the first element of the array.
 
 # --hints--
 
-You should access the first element of the `button text` property of the `location` parameter.
+You should access the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.innerText` property to be the first element of the `button text` property of the `location` parameter.
+You should set the `button1.innerText` property to be the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
index db00b5a41cd..1e6b261c5e0 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
@@ -7,32 +7,32 @@ dashedName: step-65
 
 # --description--
 
-Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `button text` array, respectively.
+Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `"button text"` array, respectively.
 
 # --hints--
 
-You should access the second element of the `button text` property of the `location` parameter.
+You should access the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.innerText` property to be the second element of the `button text` property of the `location` parameter.
+You should set the `button2.innerText` property to be the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.innerText\s*=\s*location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /button2\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button text` property of the `location` parameter.
+You should access the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.innerText` property to be the third element of the `button text` property of the `location` parameter.
+You should set the `button3.innerText` property to be the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.innerText\s*=\s*location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /button3\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
index e4a524806b2..a280ab3295c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
@@ -7,44 +7,44 @@ dashedName: step-66
 
 # --description--
 
-Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `button functions` array.
+Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `"button functions"` array.
 
 # --hints--
 
-You should access the first element of the `button functions` property of the `location` parameter.
+You should access the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.onclick` property to be the first element of the `button functions` property of the `location` parameter.
+You should set the `button1.onclick` property to be the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.onclick\s*=\s*location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /button1\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should access the second element of the `button functions` property of the `location` parameter.
+You should access the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.onclick` property to be the second element of the `button functions` property of the `location` parameter.
+You should set the `button2.onclick` property to be the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.onclick\s*=\s*location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /button2\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button functions` property of the `location` parameter.
+You should access the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.onclick` property to be the third element of the `button functions` property of the `location` parameter.
+You should set the `button3.onclick` property to be the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.onclick\s*=\s*location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /button3\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
index df0c430f1a0..313e23bca44 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
@@ -22,7 +22,7 @@ assert.match(goStore.toString(), /update\(/);
 Your `goStore` function should pass the second element of the `locations` array as your argument to `update()`.
 
 ```js
-assert.match(goStore.toString(), /update\(locations\[1\]\)/);
+assert.match(goStore.toString(), /update\(\s*locations\s*\[\s*1\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
index 9c8594a278f..f88cc4bc0c4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
@@ -26,13 +26,13 @@ assert.isFunction(fightBeast);
 `fightSlime` should be empty.
 
 ```js
-assert.match(fightSlime.toString(), /function fightSlime\(\) \{\}/);
+assert.match(fightSlime.toString(), /function fightSlime\(\s*\) \{\}/);
 ```
 
 `fightBeast` should be empty.
 
 ```js
-assert.match(fightBeast.toString(), /function fightBeast\(\) \{\}/);
+assert.match(fightBeast.toString(), /function fightBeast\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
index 55c9091cac6..a694fb3dfad 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
@@ -9,14 +9,13 @@ dashedName: step-70
 
 Add a third object to the `locations` array. Give it the same properties as the other two objects.
 
-Set `name` to `cave`. Set `button text` to an array with the strings `Fight slime`, `Fight fanged beast`, and `Go to town square`. Set the `button functions` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `You enter the cave. You see some monsters.`.
+Set `name` to `cave`. Set `button text` to an array with the strings `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`. Set the `"button functions"` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `"You enter the cave. You see some monsters."`.
 
 # --hints--
 
 You should have three values in your `locations` array.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 3);
 ```
 
@@ -26,19 +25,19 @@ Your third `locations` value should be an object.
 assert.isObject(locations[2]);
 ```
 
-Your third `locations` object should have a `name` property with the value of `cave`.
+Your third `locations` object should have a `name` property with the value of `"cave"`.
 
 ```js
 assert.equal(locations[2].name, "cave");
 ```
 
-Your third `locations` object should have a `button text` property which is an array.
+Your third `locations` object should have a `"button text"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button text"]);
 ```
 
-Your `button text` property should have the string values `Fight slime`, `Fight fanged beast`, and `Go to town square`.
+Your `"button text"` property should have the string values `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[2]["button text"][0], "Fight slime");
@@ -46,13 +45,13 @@ assert.equal(locations[2]["button text"][1], "Fight fanged beast");
 assert.equal(locations[2]["button text"][2], "Go to town square");
 ```
 
-Your third `locations` object should have a `button functions` property which is an array.
+Your third `locations` object should have a `"button functions"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button functions"]);
 ```
 
-Your `button functions` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
+Your `"button functions"` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
 
 ```js
 assert.equal(locations[2]["button functions"][0], fightSlime);
@@ -66,7 +65,7 @@ Your third `locations` object should have a `text` property which is a string.
 assert.isString(locations[2].text);
 ```
 
-Your third `locations` object should have a `text` property with the value of `You enter the cave. You see some monsters.`.
+Your third `locations` object should have a `text` property with the value of `"You enter the cave. You see some monsters."`.
 
 ```js
 assert.equal(locations[2].text, "You enter the cave. You see some monsters.");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
index 597644bbbe6..a1f27c73d0e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
@@ -7,7 +7,7 @@ dashedName: step-71
 
 # --description--
 
-Now that you have a `cave` location object, update your `goCave` function to call `update` and pass that new `cave` location. Remember that this is the third element in your `locations` array.
+Now that you have a `"cave"` location object, update your `goCave` function to call `update` and pass that new `"cave"` location. Remember that this is the third element in your `locations` array.
 
 Don't forget to remove your `console.log` call!
 
@@ -16,19 +16,19 @@ Don't forget to remove your `console.log` call!
 You should use bracket notation to access the third element in your `locations` array.
 
 ```js
-assert.match(code, /locations\[2\]/);
+assert.match(code, /locations\s*\[\s*2\s*\]/);
 ```
 
 You should pass the third element in your `locations` array to `update`.
 
 ```js
-assert.match(code, /update\(locations\[2\]\)/);
+assert.match(code, /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 You should call `update` with the third element in your `locations` array in your `goCave` function.
 
 ```js
-assert.match(goCave.toString(), /update\(locations\[2\]\)/);
+assert.match(goCave.toString(), /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 You should not have the `console.log` statement in your `goCave` function.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
index 914ad4c04c8..88b6ba1850c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
@@ -7,7 +7,7 @@ dashedName: step-72
 
 # --description--
 
-Now that your `store` and `cave` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
+Now that your `"store"` and `"cave"` locations are complete, you can code the actions the player takes at those locations. Inside the `buyHealth` function, set `gold` equal to `gold` minus `10`.
 
 For example, here is how you would set `num` equal to `5` less than `num`: `num = num - 5;`.
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
index 6b5f849b9ca..e7968d0c900 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
@@ -19,7 +19,7 @@ const total = document.querySelector('#total');
 total.innerText = value;
 ```
 
-You can test this by clicking your "Go to store" button, followed by your "Buy Health" button.
+You can test this by clicking your `"Go to store"` button, followed by your `"Buy Health"` button.
 
 **Note:** Your answer should only be two lines of code.
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
index 90a298cdf4a..0bf83175162 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
@@ -7,17 +7,20 @@ dashedName: step-76
 
 # --description--
 
-What if the player doesn't have enough gold to buy health? When you want to run code conditionally, you can use the `if` statement. Put all of the code in your `buyHealth` function inside an `if` statement. For example:
+What if the player doesn't have enough gold to buy health? When you want to run code conditionally, you can use the <dfn>if</dfn> statement.
+
+An `if` statement is used to make decisions in code. The keyword `if` is followed by a condition in parentheses. If the condition is true, the code inside the curly braces `{}` is executed. If the condition is false, the code inside the curly braces is skipped.
+
+Here is an example of an `if` statement:
 
 ```js
-function myFunction() {
-  if ("condition") {
-    console.log("Hello World!");
-  }
+const num = 5;
+if (num >= 3) {
+  console.log("This code will run because num is greater than or equal to 3.");
 }
 ```
 
-For now, the `if` statement condition should be set to the string `condition` as a placeholder.
+Start by placing all of the code in your `buyHealth` function inside an `if` statement. For the `if` statement condition, check if `gold` is greater than or equal to `10`.
 
 # --hints--
 
@@ -27,16 +30,16 @@ Your `buyHealth` function should have an `if` statement.
 assert.match(buyHealth.toString(), /if/);
 ```
 
-Your `if` statement should have the string `condition` for the condition.
+Your `if` statement should check if `gold` is greater than or equal to `10`.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)/);
 ```
 
 All of your `buyHealth` code should be inside the `if` statement.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)\s*\{[\s\S]*\}/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)\s*{\s*gold\s*-=\s*10;\s*health\s*\+=\s*10;\s*goldText\.innerText\s*=\s*gold;\s*healthText\.innerText\s*=\s*health;\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
index 466a0cb0d02..051ddd2f2d7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c5db7888af27af23f0dd
-title: Hatua ya 78
+title: Step 77
 challengeType: 0
-dashedName: step-78
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
index a7444766a4c..1498e6c09c4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8c65b75664c28a8e59c16
-title: Hatua ya 79
+title: Step 78
 challengeType: 0
-dashedName: step-79
+dashedName: step-78
 ---
 
 # --description--
 
-Inside the `else` statement, set `text.innerText` to equal `You do not have enough gold to buy health.`.
+Inside the `else` statement, set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 # --hints--
 
-Your `buyHealth` function should set `text.innerText` to equal `You do not have enough gold to buy health.`.
+Your `buyHealth` function should set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 ```js
 assert.match(buyHealth.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy health\.\1/);
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
index bd7f3f4e55c..f38b4906897 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c6815f5f1a29735efe1b
-title: Hatua ya 80
+title: Step 79
 challengeType: 0
-dashedName: step-80
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
index e1025e23907..b2dc007106e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c7322e42962ad53ad204
-title: Hatua ya 81
+title: Step 80
 challengeType: 0
-dashedName: step-81
+dashedName: step-80
 ---
 
 # --description--
 
-Just like your `locations` array, your `weapons` array will hold objects. Add four objects to the `weapons` array, each with two properties: `name` and `power`. The first should have the `name` set to `stick` and the `power` set to `5`. The second should be `dagger` and `30`. The third, `claw hammer` and `50`. The fourth, `sword` and `100`.
+Just like your `locations` array, your `weapons` array will hold objects. Add four objects to the `weapons` array, each with two properties: `name` and `power`. The first should have the `name` set to `"stick"` and the `power` set to `5`. The second should be `"dagger"` and `30`. The third, `"claw hammer"` and `50`. The fourth, `"sword"` and `100`.
 
 # --hints--
 
@@ -26,28 +26,28 @@ assert.isObject(weapons[2]);
 assert.isObject(weapons[3]);
 ```
 
-Your first `weapons` object should have the `name` set to `stick` and the `power` set to `5`.
+Your first `weapons` object should have the `name` set to `"stick"` and the `power` set to `5`.
 
 ```js
 assert.equal(weapons[0].name, 'stick');
 assert.equal(weapons[0].power, 5);
 ```
 
-Your second `weapons` object should have the `name` set to `dagger` and the `power` set to `30`.
+Your second `weapons` object should have the `name` set to `"dagger"` and the `power` set to `30`.
 
 ```js
 assert.equal(weapons[1].name, 'dagger');
 assert.equal(weapons[1].power, 30);
 ```
 
-Your third `weapons` object should have the `name` set to `claw hammer` and the `power` set to `50`.
+Your third `weapons` object should have the `name` set to `"claw hammer"` and the `power` set to `50`.
 
 ```js
 assert.equal(weapons[2].name, 'claw hammer');
 assert.equal(weapons[2].power, 50);
 ```
 
-Your fourth `weapons` object should have the `name` set to `sword` and the `power` set to `100`.
+Your fourth `weapons` object should have the `name` set to `"sword"` and the `power` set to `100`.
 
 ```js
 assert.equal(weapons[3].name, 'sword');
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
index a4a8fbc6386..dd8e2a5d9ec 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c7a59e72c02bb1c717d2
-title: Hatua ya 82
+title: Step 81
 challengeType: 0
-dashedName: step-82
+dashedName: step-81
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.include(buyWeapon.toString(), 'if');
 Your `if` statement should check if `gold` is greater than or equal to `30`.
 
 ```js
-assert.match(buyWeapon.toString(), /if\s*\(gold\s*>=\s*30\)/);
+assert.match(buyWeapon.toString(), /if\s*\(\s*gold\s*>=\s*30\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
index 8ebd20f8501..570844fee8c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c89e4272512d44fc1c66
-title: Hatua ya 83
+title: Step 82
 challengeType: 0
-dashedName: step-83
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
index 255107b744d..f7e010232a8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c8cee8e5cf2e001789b4
-title: Hatua ya 84
+title: Step 83
 challengeType: 0
-dashedName: step-84
+dashedName: step-83
 ---
 
 # --description--
 
-The value of the `currentWeapon` variable corresponds to an index in the `weapons` array. The player starts with a `stick`, since `currentWeapon` starts at `0` and `weapons[0]` is the `stick` weapon.
+The value of the `currentWeapon` variable corresponds to an index in the `weapons` array. The player starts with a `"stick"`, since `currentWeapon` starts at `0` and `weapons[0]` is the `"stick"` weapon.
 
 In the `buyWeapon` function, use compound assignment to add `1` to `currentWeapon` - the user is buying the next weapon in the `weapons` array.
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
index 22f4dc8e423..c2b63fbfcee 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ca22d29fe62f3952bdf5
-title: Hatua ya 85
+title: Step 84
 challengeType: 0
-dashedName: step-85
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
index 705271a7c17..8ebcf334d01 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8cb19bd7f8a304e5427a1
-title: Hatua ya 86
+title: Step 85
 challengeType: 0
-dashedName: step-86
+dashedName: step-85
 ---
 
 # --description--
 
-Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `You now have a new weapon.`.
+Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `"You now have a new weapon."`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should update the `innerText` property of the `goldText` element to be `gold
 assert.match(buyWeapon.toString(), /goldText\.innerText\s*=\s*gold/);
 ```
 
-You should update the `innerText` property of the `text` element to be `You now have a new weapon.`.
+You should update the `innerText` property of the `text` element to be `"You now have a new weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a new weapon\.\1/);
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
index 1daf74c1d54..81ebba26eab 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cbd1e3595431d5a2b3f1
-title: Hatua ya 87
+title: Step 86
 challengeType: 0
-dashedName: step-87
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
index d176bb72e03..a55298fd7e8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cce1b0c32c33017cf2e9
-title: Hatua ya 88
+title: Step 87
 challengeType: 0
-dashedName: step-88
+dashedName: step-87
 ---
 
 # --description--
@@ -22,7 +22,7 @@ let value = array[index];
 You should update `newWeapon` to have the value of `weapons[currentWeapon]`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
index 4bc7485c756..af0ce0a447a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ce1dfc990134162b3bd9
-title: Hatua ya 89
+title: Step 88
 challengeType: 0
-dashedName: step-89
+dashedName: step-88
 ---
 
 # --description--
@@ -14,7 +14,7 @@ dashedName: step-89
 You should update `newWeapon` to have the value of `weapons[currentWeapon].name`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]\.name;/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
index 1680408d042..a06ea68706d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8ce73d0dce43468f6689c
-title: Hatua ya 90
+title: Step 89
 challengeType: 0
-dashedName: step-90
+dashedName: step-89
 ---
 
 # --description--
 
-You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `You now have a new weapon.` string to say `You now have a` and the name of the new weapon. Remember to end the sentence with a period.
+You can insert variables into a string with the <dfn>concatenation operator</dfn> `+`. Update the `"You now have a new weapon."` string to say `"You now have a "` and the name of the new weapon. Remember to end the sentence with a period.
 
-Here is an example that creates the string `Hello, our name is freeCodeCamp.`:
+Here is an example that creates the string `"Hello, our name is freeCodeCamp."`:
 
 ```js
 const ourName = "freeCodeCamp";
@@ -18,7 +18,7 @@ const ourStr = "Hello, our name is " + ourName + ".";
 
 # --hints--
 
-You should update the `text.innerText` assignment to start with the string `You now have a`.
+You should update the `text.innerText` assignment to start with the string `"You now have a "`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a \1/);
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
index 153ae0d01db..4f2ed89e0ac 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cf22272d6d35af80d4ac
-title: Hatua ya 91
+title: Step 90
 challengeType: 0
-dashedName: step-91
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
index 53208659f6d..fddaa343d3b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d0337d7c67377a4a76c6
-title: Hatua ya 92
+title: Step 91
 challengeType: 0
-dashedName: step-92
+dashedName: step-91
 ---
 
 # --description--
 
 Up until now, any time `text.innerText` was updated, the old text was erased. This time, use the `+=` operator to add text to the end of `text.innerText`.
 
-Add the string `In your inventory you have:` - include the spaces at the beginning and the end.
+Add the string `" In your inventory you have: "` - include the spaces at the beginning and the end.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should use the `+=` operator to add to `text.innerText`.
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*/)
 ```
 
-You should add the string `In your inventory you have:` to the end of `text.innerText`. Mind the spaces!
+You should add the string `" In your inventory you have: "` to the end of `text.innerText`. Mind the spaces!
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
index f74b03c2acf..d2d697233c5 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d08668fa8b38732486e9
-title: Hatua ya 93
+title: Step 92
 challengeType: 0
-dashedName: step-93
+dashedName: step-92
 ---
 
 # --description--
@@ -11,7 +11,7 @@ At the end of the second `text.innerText` string you just added, use the concate
 
 # --hints--
 
-You should not change the `In your inventory you have:` string.
+You should not change the `" In your inventory you have: "` string.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
index 7aa38621010..08f3472f27d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d0c4f12c2239b6618582
-title: Hatua ya 94
+title: Step 93
 challengeType: 0
-dashedName: step-94
+dashedName: step-93
 ---
 
 # --description--
 
-Add an `else` statement to your `buyWeapon` function. In that statement, set `text.innerText` to equal `You do not have enough gold to buy a weapon.`.
+Add an `else` statement to your `buyWeapon` function. In that statement, set `text.innerText` to equal `"You do not have enough gold to buy a weapon."`.
 
 # --hints--
 
@@ -24,13 +24,13 @@ const split = buyWeapon.toString().split(/\s|\n/);
 assert.isAbove(split.indexOf('else'), split.indexOf('if'));
 ```
 
-You should set `text.innerText` to `You do not have enough gold to buy a weapon.`.
+You should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy a weapon.\1/);
 ```
 
-Your `else` statement should set `text.innerText` to `You do not have enough gold to buy a weapon.`.
+Your `else` statement should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 gold = 20;
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
index 44874efaef8..b8fe5b50826 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d0fdf2dad83a92883a80
-title: Hatua ya 95
+title: Step 94
 challengeType: 0
-dashedName: step-95
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
index c9d666fa9c2..0814d277818 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d143f2a58e3b6d6e9c33
-title: Hatua ya 96
+title: Step 95
 challengeType: 0
-dashedName: step-96
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
index 8266dddd935..821369edf60 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d1c72e8bb13c2074d93c
-title: Hatua ya 97
+title: Step 96
 challengeType: 0
-dashedName: step-97
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
index 8d1effb713b..5b21812459f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d2146a3e853d0a6e28ca
-title: Hatua ya 98
+title: Step 97
 challengeType: 0
-dashedName: step-98
+dashedName: step-97
 ---
 
 # --description--
 
-Add an `else` statement for your outer `if` statement. Inside this new `else` statement, set `text.innerText` to `You already have the most powerful weapon!`.
+Add an `else` statement for your outer `if` statement. Inside this new `else` statement, set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 # --hints--
 
@@ -18,13 +18,13 @@ const matches = buyWeapon.toString().match(/else/g);
 assert.equal(matches.length, 2);
 ```
 
-You should set `text.innerText` to `You already have the most powerful weapon!`.
+You should set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 ```js
 assert.match(buyWeapon.toString(), /('|")You already have the most powerful weapon!\1/);
 ```
 
-You should modify your `text.innerText` to `You already have the most powerful weapon!` within your outer `else` statement.
+You should modify your `text.innerText` to `"You already have the most powerful weapon!"` within your outer `else` statement.
 
 ```js
 currentWeapon = 5;
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
index 087d50d01e6..8adbb83ea32 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d24c97461b3ddb9397c8
-title: Hatua ya 99
+title: Step 98
 challengeType: 0
-dashedName: step-99
+dashedName: step-98
 ---
 
 # --description--
 
 Once a player has the most powerful weapon, you can give them the ability to sell their old weapons.
 
-In the outer `else` statement, set `button2.innerText` to `Sell weapon for 15 gold`. Also set `button2.onclick` to the function name `sellWeapon`.
+In the outer `else` statement, set `button2.innerText` to `"Sell weapon for 15 gold"`. Also set `button2.onclick` to the function name `sellWeapon`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should set the value of `button2.innerText`.
 assert.match(buyWeapon.toString(), /button2\.innerText/);
 ```
 
-You should set the value of `button2.innerText` to `Sell weapon for 15 gold`.
+You should set the value of `button2.innerText` to `"Sell weapon for 15 gold"`.
 
 ```js
 assert.match(buyWeapon.toString(), /button2\.innerText\s*=\s*('|")Sell weapon for 15 gold\1;/);
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
index 77957d390ae..f239b5e07bb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d2e2a073be3edb46116f
-title: Hatua ya 100
+title: Step 99
 challengeType: 0
-dashedName: step-100
+dashedName: step-99
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.isFunction(sellWeapon);
 `sellWeapon` should be an empty function.
 
 ```js
-assert.match(sellWeapon.toString(), /sellWeapon\(\)\s*\{\s*\}/);
+assert.match(sellWeapon.toString(), /sellWeapon\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
index b48547f59eb..3cf081b462d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d31ebbc10e3fe1b28e03
-title: Hatua ya 101
+title: Step 100
 challengeType: 0
-dashedName: step-101
+dashedName: step-100
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(sellWeapon.toString(), /if/);
 Your `if` statement should check if `inventory.length` is greater than `1`.
 
 ```js
-assert.match(sellWeapon.toString(), /if\s*\(inventory\.length\s*>\s*1\)/);
+assert.match(sellWeapon.toString(), /if\s*\(\s*inventory\.length\s*>\s*1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
index 23905be502c..e185edbdfe4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d35660db4040ba292193
-title: Hatua ya 102
+title: Step 101
 challengeType: 0
-dashedName: step-102
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
index f8c7faa751a..c9a8d067c6f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d382cd075f4169223e14
-title: Hatua ya 103
+title: Step 102
 challengeType: 0
-dashedName: step-103
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
index 265dd00d6dc..e6174703f8c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d539dc11cb42b5dd7ec8
-title: Hatua ya 104
+title: Step 103
 challengeType: 0
-dashedName: step-104
+dashedName: step-103
 ---
 
 # --description--
@@ -21,19 +21,19 @@ Use the `shift()` method to take the first element from the `inventory` array an
 Your `sellWeapon` function should use the `shift()` method.
 
 ```js
-assert.match(sellWeapon.toString(), /shift\(\)/);
+assert.match(sellWeapon.toString(), /shift\(\s*\)/);
 ```
 
 You should use the `shift()` method on the `inventory` array.
 
 ```js
-assert.match(sellWeapon.toString(), /inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /inventory\.shift\(\s*\)/);
 ```
 
 You should assign the value of `inventory.shift()` to your `currentWeapon` variable.
 
 ```js
-assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
index 2c9db48db96..9b5f9e125ed 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d61ddfe35744369365b7
-title: Hatua ya 105
+title: Step 104
 challengeType: 0
-dashedName: step-105
+dashedName: step-104
 ---
 
 # --description--
 
-After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `You sold a`, then `currentWeapon`, then the string `.`.
+After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `"You sold a "`, then `currentWeapon`, then the string `"."`.
 
 # --hints--
 
@@ -17,19 +17,19 @@ You should use the assignment operator with `text.innerText`.
 assert.match(sellWeapon.toString(), /text\.innerText\s*=/);
 ```
 
-You should add `You sold a` to `text.innerText`. Spacing is important.
+You should add `"You sold a "` to `text.innerText`. Spacing is important.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1/);
 ```
 
-You should add the value of `currentWeapon` to the `You sold a` string. Use the concatenation operator to do this on the same line.
+You should add the value of `currentWeapon` to the `"You sold a "` string. Use the concatenation operator to do this on the same line.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a\s\1\s*\+\s*\_currentWeapon/);
 ```
 
-You should add the string `.` to the value of `currentWeapon`. Use the concatenation operator to do this on the same line.
+You should add the string `"."` to the value of `currentWeapon`. Use the concatenation operator to do this on the same line.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1\s*\+\s*\_currentWeapon\s+\+\s+('|")\.\2/);
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
index 6024d49df3e..59c6c536b8b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d6c7001ebc45350e3d16
-title: Hatua ya 106
+title: Step 105
 challengeType: 0
-dashedName: step-106
+dashedName: step-105
 ---
 
 # --description--
 
-Now use the `+=` operator to add the string `In your inventory you have:` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `In your inventory you have:` string.
+Now use the `+=` operator to add the string `" In your inventory you have: "` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `" In your inventory you have: "` string.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const matches = sellWeapon.toString().match(/text\.innerText\s*\+=/g);
 assert.equal(matches.length, 1);
 ```
 
-You should add the string `In your inventory you have:` to the second `text.innerText` line. Spacing matters.
+You should add the string `" In your inventory you have: "` to the second `text.innerText` line. Spacing matters.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*\+=\s*('|") In your inventory you have: \1/);
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
index f5277a99670..c7dfa1f9628 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d7b8ab568b4649998954
-title: Hatua ya 107
+title: Step 106
 challengeType: 0
-dashedName: step-107
+dashedName: step-106
 ---
 
 # --description--
 
-Use an `else` statement to run when the `inventory` length is not more than one. Set the `text.innerText` to say `Don't sell your only weapon!`.
+Use an `else` statement to run when the `inventory` length is not more than one. Set the `text.innerText` to say `"Don't sell your only weapon!"`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ Your `sellWeapon` function should have an `else` statement.
 assert.match(sellWeapon.toString(), /else/);
 ```
 
-You should set `text.innerText` to `Don't sell your only weapon!`.
+You should set `text.innerText` to `"Don't sell your only weapon!"`.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")Don't sell your only weapon!\1/);
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
index 76379114ed6..a8068715efb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d81f539f004776dd9b1e
-title: Hatua ya 108
+title: Step 107
 challengeType: 0
-dashedName: step-108
+dashedName: step-107
 ---
 
 # --description--
 
 Now you can start the code to fight monsters. To keep your code organized, your `fightDragon` function has been moved for you to be near the other `fight` functions.
 
-Below your `weapons` array, define a `monsters` variable and assign it an array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. The first object's values should be `slime`, `2`, and `15`, in order. The second should be `fanged beast`, `8`, and `60`. The third should be `dragon`, `20`, and `300`.
+Below your `weapons` array, define a `monsters` variable and assign it an array. Set that array to have three objects, each with a `name`, `level`, and `health` properties. The first object's values should be `"slime"`, `2`, and `15`, in order. The second should be `"fanged beast"`, `8`, and `60`. The third should be `"dragon"`, `20`, and `300`.
 
 # --hints--
 
@@ -37,7 +37,7 @@ Your `monsters` array should have 3 objects.
 assert(monsters.every(val => typeof val === "object"));
 ```
 
-The first value in your `monsters` array should be an object with a `name` property set to `slime`.
+The first value in your `monsters` array should be an object with a `name` property set to `"slime"`.
 
 ```js
 assert.equal(monsters[0].name, "slime");
@@ -55,7 +55,7 @@ The first value in your `monsters` array should be an object with a `health` pro
 assert.equal(monsters[0].health, 15);
 ```
 
-The second value in your `monsters` array should be an object with a `name` property set to `fanged beast`.
+The second value in your `monsters` array should be an object with a `name` property set to `"fanged beast"`.
 
 ```js
 assert.equal(monsters[1].name, "fanged beast");
@@ -73,7 +73,7 @@ The second value in your `monsters` array should be an object with a `health` pr
 assert.equal(monsters[1].health, 60);
 ```
 
-The third value in your `monsters` array should be an object with a `name` property set to `dragon`.
+The third value in your `monsters` array should be an object with a `name` property set to `"dragon"`.
 
 ```js
 assert.equal(monsters[2].name, "dragon");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
index c0e08454c19..f21aeb538fa 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd468debb449b4454086
-title: Hatua ya 109
+title: Step 108
 challengeType: 0
-dashedName: step-109
+dashedName: step-108
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
index 0f39f1ca8ad..ca2db4faf54 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd9cdb16324b04cfd958
-title: Hatua ya 110
+title: Step 109
 challengeType: 0
-dashedName: step-110
+dashedName: step-109
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.notMatch(fightSlime.toString(), /let|const/);
 You should call the `goFight` function.
 
 ```js
-assert.match(fightSlime.toString(), /goFight\(\);/);
+assert.match(fightSlime.toString(), /goFight\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
index dd75185d7ef..dff775b563a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8dfcf7fb1044d2f478fd1
-title: Hatua ya 111
+title: Step 110
 challengeType: 0
-dashedName: step-111
+dashedName: step-110
 ---
 
 # --description--
 
-Following the same pattern, use that code in the `fightBeast` and `fightDragon` functions. Remember that `beast` is at index `1` and `dragon` is at index `2`. Also, remove the `console.log` call from your `fightDragon` function.
+Following the same pattern as the `fightSlime` function, use that code in the `fightBeast` and `fightDragon` functions. Remember that `beast` is at index `1` and `dragon` is at index `2`. Also, remove the `console.log` call from your `fightDragon` function.
 
 # --hints--
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
index 916b2b8698a..fa62f97c4f9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e0d1d0110b4ec421489f
-title: Hatua ya 112
+title: Step 111
 challengeType: 0
-dashedName: step-112
+dashedName: step-111
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
index e030b5417f1..9ff3ee038cb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
@@ -1,20 +1,19 @@
 ---
 id: 62a8e142f7f0bd4fed898de3
-title: Hatua ya 113
+title: Step 112
 challengeType: 0
-dashedName: step-113
+dashedName: step-112
 ---
 
 # --description--
 
-Add a new object to the end of the `locations` array, following the same properties as the rest of the objects. Set `name` to `fight`, `button text` to an array with `Attack`, `Dodge`, and `Run`, `button functions` to an array with `attack`, `dodge`, and `goTown`, and `text` to `You are fighting a monster.`.
+Add a new object to the end of the `locations` array, following the same properties as the rest of the objects. Set `name` to `"fight"`, `"button text"` to an array with `"Attack"`, `"Dodge"`, and `"Run"`, `"button functions"` to an array with `attack`, `dodge`, and `goTown`, and `text` to `"You are fighting a monster."`.
 
 # --hints--
 
 Your `locations` array should have 4 values in it.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 4);
 ```
 
@@ -24,25 +23,25 @@ Your new value should be an object.
 assert.isObject(locations[3]);
 ```
 
-Your new object should have a `name` property set to `fight`.
+Your new object should have a `name` property set to `"fight"`.
 
 ```js
 assert.equal(locations[3].name, "fight");
 ```
 
-Your new object should have a `button text` property set to an array with the strings `Attack`, `Dodge`, and `Run`.
+Your new object should have a `"button text"` property set to an array with the strings `"Attack"`, `"Dodge"`, and `"Run"`.
 
 ```js
 assert.deepEqual(locations[3]["button text"], ["Attack", "Dodge", "Run"]);
 ```
 
-Your new object should have a `button functions` property set to an array with the variables `attack`, `dodge`, and `goTown`.
+Your new object should have a `"button functions"` property set to an array with the variables `attack`, `dodge`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[3]["button functions"], [attack, dodge, goTown]);
 ```
 
-Your new object should have a `text` property set to `You are fighting a monster.`.
+Your new object should have a `text` property set to `"You are fighting a monster."`.
 
 ```js
 assert.equal(locations[3].text, "You are fighting a monster.");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
index bbf2f27c053..1a6b6592b70 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e1dc897df55108bcb5e8
-title: Hatua ya 114
+title: Step 113
 challengeType: 0
-dashedName: step-114
+dashedName: step-113
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(goFight.toString(), /update/);
 You should pass the fourth object in your `locations` array to your `update` call.
 
 ```js
-assert.match(goFight.toString(), /update\(locations\[3\]\)/);
+assert.match(goFight.toString(), /update\(\s*locations\s*\[\s*3\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
index eb1528fdf69..2e11e5e73a1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e21398ad61520edb724f
-title: Hatua ya 115
+title: Step 114
 challengeType: 0
-dashedName: step-115
+dashedName: step-114
 ---
 
 # --description--
@@ -14,13 +14,13 @@ Below your `update` call, set the `monsterHealth` to be the health of the curren
 You should use bracket notation to access the `monsters` array at the `fighting` index.
 
 ```js
-assert.match(goFight.toString(), /monsters\[fighting\]/);
+assert.match(goFight.toString(), /monsters\s*\[\s*fighting\s*\]/);
 ```
 
 You should assign the value of `monsters[fighting]` to the `monsterHealth` variable.
 
 ```js
-assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\[fighting\](\.health|\[('|")health\2\])/);
+assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\s*\[\s*fighting\s*\]\s*(\.health|\[\s*('|")health\2\s*\])/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
index 4955e73c8f9..68b74b82134 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
@@ -1,18 +1,25 @@
 ---
 id: 62a8e24c673b075317cc0b09
-title: Hatua ya 116
+title: Step 115
 challengeType: 0
-dashedName: step-116
+dashedName: step-115
 ---
 
 # --description--
 
-The HTML element that shows the monster's stats has been hidden with CSS. Display the `monsterStats` element by updating the `display` property of the `style` property to `block`. For example, updating the `first` property of the `name` property of `user` would look like:
+By default, the HTML element that shows the monster's stats has been hidden with CSS. When the player clicks the "Fight dragon" button, the monster's stats should be displayed. You can accomplish this by using the <dfn>style</dfn> and <dfn>display</dfn> properties on the `monsterStats` element.
+
+The `style` property is used to access the inline style of an element and the `display` property is used to set the visibility of an element.
+
+Here is an example of how to update the display for a paragraph element:
 
 ```js
-user.name.first = "Naomi";
+const paragraph = document.querySelector('p');
+paragraph.style.display = 'block';
 ```
 
+Display the `monsterStats` element by updating the `display` property of the `style` property to `block`.
+
 # --hints--
 
 You should use dot notation to access the `style` property of `monsterStats`.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
index e24439ae6e8..8629818b67e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e271f8e3d1541f9624ad
-title: Hatua ya 117
+title: Step 116
 challengeType: 0
-dashedName: step-117
+dashedName: step-116
 ---
 
 # --description--
 
-Now, set the `innerText` property of `monsterName` to be the `name` property of the current monster. Do the same for `monsterHealthText` and the `health` property.
+Now, you will need to update the text for the current monster's name and health.
+
+Start by assigning `monsters[fighting].name` to the `innerText` property of `monsterName`. Then, assign `monsterHealth` to the `innerText` property of `monsterHealthText`.
 
 # --hints--
 
@@ -17,10 +19,10 @@ You should use dot notation to access the `innerText` property of `monsterName`.
 assert.match(goFight.toString(), /monsterName\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterName` to be the `name` value of the current monster. Remember that you can get the current monster with `monsters[fighting]`.
+You should assign `monsters[fighting].name` to `monsterName.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\[fighting\]\.name/);
+assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 You should use dot notation to access the `innerText` property of `monsterHealthText`.
@@ -29,10 +31,10 @@ You should use dot notation to access the `innerText` property of `monsterHealth
 assert.match(goFight.toString(), /monsterHealthText\.innerText/);
 ```
 
-You should set the `innerText` property of `monsterHealthText` to be the `health` value of the current monster. You can get the current monster with `monsters[fighting]` or you can access this value using the `monsterHealth` variable that you previously assigned.
+You should assign `monsterHealth` to `monsterHealthText.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\[fighting\]\.health/);
+assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.health/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
index ee04ba0b84b..c715960538e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e35675c18c56354c08cf
-title: Hatua ya 118
+title: Step 117
 challengeType: 0
-dashedName: step-118
+dashedName: step-117
 ---
 
 # --description--
 
-Now you can build the `attack` function. First, update the `text` message to say `The <monster name> attacks.`, replacing `<monster name>` with the name of the monster. Remember you can use the concatenation operator for this.
+Now you can build the `attack` function. First, update the `text` message to say `"The <monster name> attacks."`, replacing `<monster name>` with the name of the monster. Remember you can use the concatenation operator for this.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1/);
 You should use the concatenation operator to add the value of `monsters[fighting].name` to the `The` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 You should use the concatenation operator to add the string `attacks.` to the `monsters[fighting].name` string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name\s*\+\s*('|") attacks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name\s*\+\s*('|") attacks\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
index c9653b798ca..e062f34ae25 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e41e2f190c58404dd46e
-title: Step 119
+title: Step 118
 challengeType: 0
-dashedName: step-119
+dashedName: step-118
 ---
 
 # --description--
 
-On a new line, add the string `You attack it with your <weapon>.` to the `text` value, replacing `<weapon>` with the player's current weapon.
+On a new line, use the addition assignment operator(`+=`), to add the string `" You attack it with your <weapon>."` to the `text` value, replacing `<weapon>` with the player's current weapon. Additionally, remember that this line of text starts with a space so it will properly display.
 
 # --hints--
 
@@ -24,7 +24,7 @@ You should use compound assignment with `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=/);
 ```
 
-You should add the string `You attack it with your` to the `text.innerText` value. Remember that spacing matters.
+You should add the string `" You attack it with your "` to the `text.innerText` value. Remember that spacing matters.
 
 ```js
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1/);
@@ -33,13 +33,13 @@ assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it wit
 You should use the concatenation operator to add the current weapon to the string. You can get the current weapon with `weapons[currentWeapon].name`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name/);
 ```
 
-You should use the concatenation operator to end your string with `.`.
+You should use the concatenation operator to end your string with `"."`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name\s*\+\s*('|")\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*\+\s*('|")\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
index b361327a46e..689a350b599 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e45cc600c3591cee671a
-title: Step 120
+title: Step 119
 challengeType: 0
-dashedName: step-120
+dashedName: step-119
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(attack.toString(), /health\s*-=/);
 You should subtract the monster's current level from `health`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*monsters\[fighting\]\.level/);
+assert.match(attack.toString(), /health\s*-=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
index edbe68894a5..ac76865ed0a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e49f4df7af5ae2d7a616
-title: Step 121
+title: Step 120
 challengeType: 0
-dashedName: step-121
+dashedName: step-120
 ---
 
 # --description--
 
-Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon. Remember you have the `currentWeapon` variable and the `power` property.
+Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon.
+
+Remember that you can access the power of the player's current weapon using `weapons[currentWeapon].power`.
 
 # --hints--
 
@@ -20,19 +22,19 @@ assert.match(attack.toString(), /monsterHealth\s*-=/);
 You should use bracket notation with `currentWeapon` to access `weapons`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 You should use dot notation to access the `power` property of `weapons[currentWeapon]`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 You should subtract the `power` of the current weapon from `monsterHealth`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
index 7052a0ec1ea..01b05467403 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8e4dc6a60f85bf256a0cb
-title: Step 122
+title: Step 121
 challengeType: 0
-dashedName: step-122
+dashedName: step-121
 ---
 
 # --description--
 
 The `Math` object in JavaScript contains static properties and methods for mathematical constants and functions. One of those is `Math.random()`, which generates a random number from `0` (inclusive) to `1` (exclusive). Another is `Math.floor()`, which rounds a given number down to the nearest integer.
 
-Using these, you can generate a random number within a range. For example, this generates a random number between 1 and 5: `Math.floor(Math.random() * 5) + 1;`.
+Using these, you can generate a random number within a range. For example, this generates a random number between `1` and `5`: `Math.floor(Math.random() * 5) + 1;`.
 
 Following this pattern, use the addition operator (`+`) to add a random number between `1` and the value of `xp` to your `monsterHealth -= weapons[currentWeapon].power`.
 
@@ -24,7 +24,7 @@ assert.lengthOf(attack.toString().match(/monsterHealth/g), 1);
 You should add to the `weapons[currentWeapon].power` value.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+/);
 ```
 
 You should use `Math.floor()`.
@@ -42,25 +42,25 @@ assert.match(attack.toString(), /Math\.random/);
 You should multiply `Math.random()` by the value of `xp`.
 
 ```js
-assert.match(attack.toString(), /Math\.random\(\)\s*\*\s*xp/);
+assert.match(attack.toString(), /Math\.random\(\s*\)\s*\*\s*xp/);
 ```
 
 You should use `Math.floor()` to round the result of `Math.random() * xp` down.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\)\s*\*\s*xp\s*.*\)/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*.*\)/);
 ```
 
 You should add `1` to the result of `Math.floor()`.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 You should add the result of `Math.floor(Math.random() * xp) + 1` to the result of `weapons[currentWeapon].power`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
index d07c342c9ed..4931f15d514 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ed36d7a7915dfa444ba2
-title: Step 123
+title: Step 122
 challengeType: 0
-dashedName: step-123
+dashedName: step-122
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
index 184411b324c..60667347322 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8edd05e27cc668051686f
-title: Step 124
+title: Step 123
 challengeType: 0
-dashedName: step-124
+dashedName: step-123
 ---
 
 # --description--
@@ -20,13 +20,13 @@ assert.match(attack.toString(), /if/);
 Your `if` statement should check if `health` is less than or equal to `0`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(health\s*<=\s*0\)/);
+assert.match(attack.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 ```
 
 Your `if` statement should call the `lose` function.
 
 ```js
-assert.match(attack.toString(), /lose\(\)/);
+assert.match(attack.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
index 1680731ee2a..38749c74fe0 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee154c8946678775c4a4
-title: Step 125
+title: Step 124
 challengeType: 0
-dashedName: step-125
+dashedName: step-124
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
index 6bbfbde991a..2929ee44bf5 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee71f018e968a056d369
-title: Step 126
+title: Step 125
 challengeType: 0
-dashedName: step-126
+dashedName: step-125
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(code, /function\s+defeatMonster/);
 `defeatMonster` should be an empty function.
 
 ```js
-assert.match(defeatMonster.toString(), /defeatMonster\s*\(\)\s*\{\s*\}/);
+assert.match(defeatMonster.toString(), /defeatMonster\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 You should use the `function` keyword to declare `lose`.
@@ -32,7 +32,7 @@ assert.match(code, /function\s+lose/);
 `lose` should be an empty function.
 
 ```js
-assert.match(lose.toString(), /lose\s*\(\)\s*\{\s*\}/);
+assert.match(lose.toString(), /lose\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
index 477c4f7710e..f8f57306b03 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8eec45f77bc69e8775294
-title: Step 127
+title: Step 126
 challengeType: 0
-dashedName: step-127
+dashedName: step-126
 ---
 
 # --description--
 
-Inside the `dodge` function, set `text.innerText` equal to the string `You dodge the attack from the <monster>`. Replace `<monster>` with the name of the monster, using the `name` property.
+Inside the `dodge` function, set `text.innerText` equal to the string `"You dodge the attack from the <monster>"`. Replace `<monster>` with the name of the monster, using the `name` property.
 
 # --hints--
 
-You should assign the string `You dodge the attack from the` to the `text.innerText` property. Remember that spacing matters.
+You should assign the string `"You dodge the attack from the "` to the `text.innerText` property. Remember that spacing matters.
 
 ```js
 assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1/);
@@ -20,7 +20,7 @@ assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack
 You should use the concatenation operator to add the name of the monster to the end of the string. You can get this with `monsters[fighting].name`.
 
 ```js
-assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
index 06490d9093e..e32d3bd0439 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8eefe2e68b66ac563816b
-title: Step 128
+title: Step 127
 challengeType: 0
-dashedName: step-128
+dashedName: step-127
 ---
 
 # --description--
 
-In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. You can get the monster's level with the `level` property.
+In your `defeatMonster` function, set `gold` equal to `gold` plus the monster's level times `6.7`. Remember you can get the monster's level by using `monsters[fighting].level`.
 
 Here is an example of setting `num` to `num` plus `5` * `8`: `num += 5 * 8`. Use `Math.floor()` to round the result down.
 
@@ -22,13 +22,13 @@ assert.match(defeatMonster.toString(), /gold\s*\+=/);
 You should use `Math.floor()` to round the result of the monster's level times `6.7`.
 
 ```js
-assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\))/);
 ```
 
 You should add the result of `Math.floor(monsters[fighting].level * 6.7)` to `gold`.
 
 ```js
-assert.match(defeatMonster.toString(), /gold\s*\+=\s*(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /gold\s*\+=\s*((Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)))/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
index 3301aa6246b..a23344528d5 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef6a52292f6bdca4f6f8
-title: Step 129
+title: Step 128
 challengeType: 0
-dashedName: step-129
+dashedName: step-128
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /xp\s*\+=/);
 You should add the monster's level to `xp`.
 
 ```js
-assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\[fighting\]\.level/);
+assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
index 1170568e396..d573e966cac 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef8f0c76a46cd221a68c
-title: Step 130
+title: Step 129
 challengeType: 0
-dashedName: step-130
+dashedName: step-129
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
index fd123524213..4a948c96439 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8efb0e3ce826db8daf80f
-title: Step 131
+title: Step 130
 challengeType: 0
-dashedName: step-131
+dashedName: step-130
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /update/);
 You should pass `locations[4]` as the argument.
 
 ```js
-assert.match(defeatMonster.toString(), /update\(locations\[4\]\)/);
+assert.match(defeatMonster.toString(), /update\(\s*locations\s*\[\s*4\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
index db2c7c81425..76fd64bb570 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8eff21c0b0f6ebe5b8e38
-title: Step 132
+title: Step 131
 challengeType: 0
-dashedName: step-132
+dashedName: step-131
 ---
 
 # --description--
 
 Your `locations` array doesn't have a fifth element, so `locations[4]` doesn't work.
 
-Add a new object at the end of the `locations` array, following the same structure as the other objects. Set `name` to `kill monster`, set `button text` to an array with three `Go to town square` strings, set `button functions` to an array with three `goTown` variables, and set `text` to `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Add a new object at the end of the `locations` array, following the same structure as the other objects. Set `name` to `"kill monster"`, set `"button text"` to an array with three `"Go to town square"` strings, set `"button functions"` to an array with three `goTown` variables, and set `text` to `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 # --hints--
 
@@ -25,25 +25,25 @@ Your fifth `locations` value should be an object.
 assert.isObject(locations[4]);
 ```
 
-Your fifth `locations` value should have a `name` property with the value `kill monster`.
+Your fifth `locations` value should have a `name` property with the value `"kill monster"`.
 
 ```js
 assert.equal(locations[4].name, 'kill monster');
 ```
 
-Your fifth `locations` value should have a `button text` array with three `Go to town square` strings.
+Your fifth `locations` value should have a `"button text"` array with three `"Go to town square"` strings.
 
 ```js
 assert.deepEqual(locations[4]["button text"], ['Go to town square', 'Go to town square', 'Go to town square']);
 ```
 
-Your fifth `locations` value should have a `button functions` array with three `goTown` variables.
+Your fifth `locations` value should have a `"button functions"` array with three `goTown` variables.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, goTown]);
 ```
 
-Your fifth `locations` value should have a `text` property with the value `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Your fifth `locations` value should have a `text` property with the value `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams Arg! as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
index 6209dc3d35d..42320970f45 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8f06fb318666fef69f91e
-title: Step 133
+title: Step 132
 challengeType: 0
-dashedName: step-133
+dashedName: step-132
 ---
 
 # --description--
 
-The word `Arg!` should have quotes around it. Besides escaping quotes, there is another way you can include quotation marks inside a string.
+The word `"Arg!"` should have quotes around it. Besides escaping quotes, there is another way you can include quotation marks inside a string.
 
-Change the double quotes around the string `The monster screams Arg! as it dies. You gain experience points and find gold.` to single quotes `'`, then add double quotes around `Arg!`.
+Change the double quotes around the string `"The monster screams Arg! as it dies. You gain experience points and find gold."` to single quotes `'`, then add double quotes around `"Arg!"`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should use single quotes around the string.
 assert.match(code, /'The monster screams "?Arg!"? as it dies. You gain experience points and find gold.'/);
 ```
 
-You should use double quotes around `Arg!`.
+You should use double quotes around `"Arg!"`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams "Arg!" as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
index d3d163e5feb..9137e403c0b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f14fe6d1fc72454648c7
-title: Step 134
+title: Step 133
 challengeType: 0
-dashedName: step-134
+dashedName: step-133
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
index 27cfddf7384..9d984dbb5a9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f1d5f5ddbf74c07f733b
-title: Step 135
+title: Step 134
 challengeType: 0
-dashedName: step-135
+dashedName: step-134
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(lose.toString(), /update\(/);
 Your `update` function should have `locations[5]` for the argument.
 
 ```js
-assert.match(lose.toString(), /update\(locations\[5\]\)/);
+assert.match(lose.toString(), /update\(\s*locations\s*\[\s*5\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
index 9947c835faa..a4d22989a7e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f20463b324759953edad
-title: Step 136
+title: Step 135
 challengeType: 0
-dashedName: step-136
+dashedName: step-135
 ---
 
 # --description--
@@ -45,7 +45,7 @@ Your `restart` function should set `currentWeapon` to `0`.
 assert.match(restart.toString(), /currentWeapon\s*=\s*0/);
 ```
 
-Your `restart` function should set `inventory` to an array with the string `stick`.
+Your `restart` function should set `inventory` to an array with the string `"stick"`.
 
 ```js
 assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
@@ -54,7 +54,7 @@ assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
 Your `restart` function should call the `goTown()` function.
 
 ```js
-assert.match(restart.toString(), /goTown\(\)/);
+assert.match(restart.toString(), /goTown\(\s*\)/);
 ```
 
 You should set `goldText.innerText` to the value of `gold`.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
index 35c1b321145..6e05e05b776 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f256b813a476cae51f49
-title: Step 138
+title: Step 137
 challengeType: 0
-dashedName: step-138
+dashedName: step-137
 ---
 
 # --description--
@@ -41,7 +41,7 @@ You should call the `winGame` function in your `if` block.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\)(\s*\})?/);
+assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\s*\)(\s*\})?/);
 ```
 
 You should add an `else` block.
@@ -55,7 +55,7 @@ Your `else` block should call the `defeatMonster` function.
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\)(\s*\})?/);
+assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\s*\)(\s*\})?/);
 ```
 
 # --seed--
@@ -220,7 +220,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
index 095200ed56e..a43ddc6b3af 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
@@ -20,7 +20,7 @@ assert.match(code, /function\s+winGame/);
 Your `winGame` function should call the `update` function and pass in `locations[6]`.
 
 ```js
-assert.match(winGame.toString(), /update\s*\(\s*locations\[6\]\s*\)/);
+assert.match(winGame.toString(), /update\s*\(\s*locations\s*\[\s*6\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -185,7 +185,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
index b70c74ede29..f2b63a0893c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
@@ -7,7 +7,7 @@ dashedName: step-140
 
 # --description--
 
-Add another object in the `locations` array. Everything should be the same as the `lose` object, except the `name` should be `win` and the `text` should be `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Add another object in the `locations` array. Everything should be the same as the `lose` object, except the `name` should be `"win"` and the `text` should be `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 # --hints--
 
@@ -23,13 +23,13 @@ Your seventh `locations` value should be an object.
 assert.isObject(locations[6]);
 ```
 
-Your seventh `locations` value should have a `name` property with the value `win`.
+Your seventh `locations` value should have a `name` property with the value `"win"`.
 
 ```js
 assert.equal(locations[6].name, 'win');
 ```
 
-Your seventh `locations` value should have a `button text` array with three `REPLAY?` strings.
+Your seventh `locations` value should have a `button text` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[6]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
@@ -41,10 +41,10 @@ Your seventh `locations` value should have a `button functions` array with three
 assert.deepEqual(locations[6]["button functions"], [restart, restart, restart]);
 ```
 
-Your seventh `locations` value should have a `text` property with the value `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Your seventh `locations` value should have a `text` property with the value `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 ```js
-assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! 🎉');
+assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! &#x1F389;');
 ```
 
 # --seed--
@@ -210,7 +210,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 --fcc-editable-region--
 ];
@@ -228,7 +228,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
index 8214d5dbf0f..b7bad4b4074 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
@@ -16,7 +16,7 @@ Inside your `attack` function, change your `health -= monsters[fighting].level;`
 You should update your `health` line to be `health -= getMonsterAttackValue(monsters[fighting].level);`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(monsters\[fighting\]\.level\)/);
+assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)/);
 ```
 
 # --seed--
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -204,7 +204,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
index 73b31c2143e..f55432b2c36 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
index a0adfe98005..94bef351fd7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
@@ -22,13 +22,13 @@ assert.match(code, /const\s+hit/);
 You should use the equation `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(Math\.random\(\)\s*\*\s*xp\))/);
+assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\))/);
 ```
 
 You should set `hit` to the value of `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(code, /hit\s*=\s*\(level\s*\*\s*5\)\s*-\s*\(Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\)/);
+assert.match(code, /hit\s*=\s*\(\s*level\s*\*\s*5\s*\)\s*-\s*\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
index 42231b65d84..1ac1b564f17 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
index 095532194d9..4258cf8fd54 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
@@ -188,13 +188,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -211,7 +211,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
index df43e068822..52b90e06276 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
@@ -207,13 +207,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -230,7 +230,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
index 86b76032640..351dab64559 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
index c06fa522511..8ac903940a1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
@@ -14,7 +14,7 @@ Move your `monsterHealth` assignment into your `if` block.
 You should move your `monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1` into your `if` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1/)
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
index ec8229acffd..0f1429cf2ad 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
@@ -7,20 +7,20 @@ dashedName: step-149
 
 # --description--
 
-Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `You miss.` to the end of `text.innerText`.
+Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `" You miss."` to the end of `text.innerText`.
 
 # --hints--
 
 You should add an `else` block after your `if (isMonsterHit())` block.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else/)
 ```
 
-You should add the text `You miss.` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
+You should add the text `" You miss."` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
index 67dfb73b231..d416bbb7431 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
@@ -20,7 +20,7 @@ assert.match(code, /function\s+isMonsterHit/);
 Your `isMonsterHit` function should return the result of the comparison `Math.random() > .2`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2/);
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
index b0a0653d893..7784c2d49de 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
@@ -32,7 +32,7 @@ assert.match(isMonsterHit.toString(), /\|\|\s*health\s*<\s*20/);
 Your function should return the result of the comparison `Math.random() > .2` **or** `health < 20`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
 ```
 
 # --seed--
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
index 495bec18415..fa6e46189de 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
@@ -21,7 +21,7 @@ assert.lengthOf(ifs, 5);
 Your new `if` statement should check `Math.random() <= .1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\)\s*<=\s*0?\.1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*<=\s*0?\.1\s*\)/);
 ```
 
 # --seed--
@@ -186,13 +186,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -209,7 +209,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
index 9ebf66f29ff..75e7e7fdc67 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
@@ -7,7 +7,7 @@ dashedName: step-153
 
 # --description--
 
-Use the `+=` operator to add `Your <weapon> breaks.`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
+Use the `+=` operator to add `" Your <weapon> breaks."`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
 
 # --hints--
 
@@ -21,7 +21,7 @@ assert.lengthOf(concat, 3);
 You should use the `pop` method on the `inventory` array.
 
 ```js
-assert.match(attack.toString(), /inventory\.pop\(\)/);
+assert.match(attack.toString(), /inventory\.pop\(\s*\)/);
 ```
 
 You should add `Your`, with a space before and after it, to `text.innerText`.
@@ -30,17 +30,16 @@ You should add `Your`, with a space before and after it, to `text.innerText`.
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1/);
 ```
 
-You should add the return value of `inventory.pop()` to the `Your` string.
+You should add the return value of `inventory.pop()` to the `" Your "` string.
 
 ```js
-console.log(attack.toString());
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)/);
 ```
 
-You should add `breaks.`, with a space in front of it, to the end of your string.
+You should add `" breaks."`, with a space in front of it, to the end of your string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)\s*\+\s*('|")\sbreaks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)\s*\+\s*('|")\sbreaks\.\2/);
 ```
 
 # --seed--
@@ -205,13 +204,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -228,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
index 97d5746c0e6..cb4f98370a3 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
@@ -7,7 +7,13 @@ dashedName: step-154
 
 # --description--
 
-Remember that the increment operator `++` can be used to increase a variable's value by 1. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by 1.
+Remember that the increment operator `++` can be used to increase a variable's value by `1`. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by `1`. For example :
+
+```js
+let num = 10;
+num--;
+console.log(num); // Output: 9
+```
 
 Decrement the value of `currentWeapon` in your `if` statement, after you update the text.
 
@@ -187,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -210,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
index 81204537ebf..fb08209886d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
@@ -24,19 +24,19 @@ if (firstName === "Quincy" && lastName === "Larson") {
 You should not modify your existing `if` statement.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1/);
 ```
 
 You should use the logical AND operator `&&`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&/);
 ```
 
 You should use the logical AND operator to check if `inventory.length` does not equal `1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
 ```
 
 # --seed--
@@ -201,13 +201,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
index fe35aa83b6e..3320abac13c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
@@ -28,7 +28,7 @@ assert.match(easterEgg.toString(), /update\(/);
 `easterEgg` should call the `update` function with `locations[7]` as the argument.
 
 ```js
-assert.match(easterEgg.toString(), /update\(\s*locations\[7\]\s*\)/);
+assert.match(easterEgg.toString(), /update\(\s*locations\s*\[\s*7\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
index 151cf4ed2d5..bc5c75fdb1e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
index 8ff8ec6621b..c4f60b0792a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
@@ -211,13 +211,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -234,7 +234,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
index b5755984113..5bcd8e739c0 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
@@ -7,7 +7,7 @@ dashedName: step-159
 
 # --description--
 
-Add another object to your `locations` array. Set `name` to `easter egg`, set `button text` to an array with the strings `2`, `8`, and `Go to town square?`, set `button functions` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Add another object to your `locations` array. Set `name` to `"easter egg"`, set `"button text"` to an array with the strings `"2"`, `"8"`, and `"Go to town square?"`, set `"button functions"` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 # --hints--
 
@@ -23,25 +23,25 @@ Your eighth `locations` value should be an object.
 assert.isObject(locations[7]);
 ```
 
-Your eighth `locations` value should have a `name` property with the value `easter egg`.
+Your eighth `locations` value should have a `name` property with the value `"easter egg"`.
 
 ```js
 assert.equal(locations[7].name, "easter egg");
 ```
 
-Your eighth `locations` value should have a `button text` array with the strings `2`, `8`, and `Go to town square?`.
+Your eighth `locations` value should have a `"button text"` array with the strings `"2"`, `"8"`, and `"Go to town square?"`.
 
 ```js
 assert.deepEqual(locations[7]["button text"], ["2", "8", "Go to town square?"]);
 ```
 
-Your eighth `locations` value should have a `button functions` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
+Your eighth `locations` value should have a `"button functions"` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[7]["button functions"], [pickTwo, pickEight, goTown]);
 ```
 
-Your eighth `locations` value should have a `text` property with the value `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Your eighth `locations` value should have a `text` property with the value `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 ```js
 assert.equal(locations[7].text, "You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!");
@@ -209,13 +209,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
 --fcc-editable-region--
 
@@ -235,7 +235,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
index 4eb559dc555..144e384890e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
@@ -14,7 +14,7 @@ Inside `pick`, use `const` to initialize a variable named `numbers` and set it t
 Your `pick` function should initialize `numbers` to an empty array `[]`.
 
 ```js
-assert.match(pick.toString(), /numbers\s*=\s*\[\]/);
+assert.match(pick.toString(), /numbers\s*=\s*\[\s*\]/);
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
index adff63df501..690b9c4efd5 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
@@ -195,13 +195,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
index 63256c6816a..c7319b7da11 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
@@ -20,13 +20,13 @@ assert.match(pick.toString(), /numbers\.push\(/);
 You should use `Math.floor(Math.random() * 11)` to create the random number.
 
 ```js
-assert.match(pick.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)/);
+assert.match(pick.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)/);
 ```
 
 You should `push` the result of `Math.floor(Math.random() * 11)` to the end of the `numbers` array.
 
 ```js
-assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)\s*\)/);
+assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
index 6f6db396fee..50ee79091f1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
@@ -7,23 +7,23 @@ dashedName: step-163
 
 # --description--
 
-After the `while` loop, set `text.innerText` to equal `You picked <someGuess>. Here are the random numbers:`. Replace `<someGuess>` with the `guess` function parameter.
+After the `while` loop, set `text.innerText` to equal `"You picked <someGuess>. Here are the random numbers:"`. Replace `<someGuess>` with the `guess` function parameter.
 
 # --hints--
 
-You should set `text.innerText` to the string `You picked`. Remember that spacing matters.
+You should set `text.innerText` to the string `"You picked "`. Remember that spacing matters.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1/);
 ```
 
-You should use the concatenation operator to add the value of the `guess` parameter to your `You picked` string.
+You should use the concatenation operator to add the value of the `guess` parameter to your `"You picked "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess/);
 ```
 
-You should use the concatenation operator to add the string `. Here are the random numbers:` to your `"You picked " + guess` string.
+You should use the concatenation operator to add the string `". Here are the random numbers:"` to your `"You picked " + guess` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\2/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
index 5f4c6ece5c7..b5c0ff67275 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
@@ -11,7 +11,7 @@ At the end of the string, before the final quote, insert the new line escape cha
 
 # --hints--
 
-You should add the new line escape character `\n` to your `. Here are the random numbers:` string.
+You should add the new line escape character `\n` to your `". Here are the random numbers: "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\\n\2/);
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
index b1feb5c19e8..4cfce9c5908 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -214,7 +214,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
index 0030e660a57..1f2ce1ffbfa 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
@@ -11,7 +11,7 @@ dashedName: step-166
 
 The initialization expression is executed only once, before the loop starts, and is often used to define and set up the loop variable. Think of it like declaring a counter to use in your loop.
 
-Many `for` loops use `i` as the counter and start from 0, so change `let x = 1;` to `let i = 0;`.
+Many `for` loops use `i` as the counter and start from `0`, so change `let x = 1;` to `let i = 0;`.
 
 # --hints--
 
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
index b6b9c8a6121..82b517528b7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
@@ -9,7 +9,7 @@ dashedName: step-167
 
 The second statement in a `for` loop, the condition statement, is evaluated at the beginning of every loop iteration. The loop will continue as long as the condition evaluates to be true.
 
-We want the loop to run 10 times, so change `x < 5` to `i < 10`.
+We want the loop to run `10` times, so change `x < 5` to `i < 10`.
 
 # --hints--
 
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
index d9ec16a15e7..d87e5e62858 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
index d7f2dcd44d4..71875c1a0ea 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
@@ -20,20 +20,19 @@ assert.match(pick.toString(), /text\.innerText\s*\+=/);
 You should use bracket notation to access `numbers[i]`.
 
 ```js
-assert.match(pick.toString(), /numbers\[i\]/);
+assert.match(pick.toString(), /numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add `numbers[i]` to your `text.innerText` value.
 
 ```js
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]/);
 ```
 
 You should add a new-line character after the `numbers[i]` value. Remember that you can do this with `\n`.
 
 ```js
-console.log(pick.toString());
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]\s*\+\s*('|")\\n\1/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]\s*\+\s*('|")\\n\1/);
 ```
 
 # --seed--
@@ -198,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
index 04c6da995f6..5d2de454974 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
@@ -198,13 +198,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
index 8c027fab766..659e9a1e4b1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
@@ -7,11 +7,11 @@ dashedName: step-171
 
 # --description--
 
-Inside the `if` statement, add the string `Right! You win 20 gold!` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
+Inside the `if` statement, add the string `"Right! You win 20 gold!"` to the end of `text.innerText`. Also, add `20` to the value of `gold` and update the `goldText.innerText`.
 
 # --hints--
 
-You should use compound assignment to add the string `Right! You win 20 gold!` to the end of `text.innerText`.
+You should use compound assignment to add the string `"Right! You win 20 gold!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Right! You win 20 gold!\1/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
index b5fc8597c6d..b0868a55bf0 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
@@ -7,7 +7,7 @@ dashedName: step-172
 
 # --description--
 
-Now add an `else` statement. Inside, add `Wrong! You lose 10 health!` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
+Now add an `else` statement. Inside, add `"Wrong! You lose 10 health!"` to the end of `text.innerText`. Subtract `10` from `health` and update `healthText.innerText`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should add an `else` block.
 assert.match(pick.toString(), /else\s*\{/);
 ```
 
-Your `else` block should use compound assignment to add `Wrong! You lose 10 health!` to the end of `text.innerText`.
+Your `else` block should use compound assignment to add `"Wrong! You lose 10 health!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Wrong! You lose 10 health!\1/);
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -226,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
index 5a9af82631f..650fe59ddd1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
@@ -27,7 +27,7 @@ assert.match(pick.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 Your `if` statement should call the `lose` function.
 
 ```js
-assert.match(pick.toString(), /lose\(\)/);
+assert.match(pick.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
@@ -192,13 +192,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -221,7 +221,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
index 7bff28bc93a..ebf70ca3d06 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
@@ -7,13 +7,13 @@ dashedName: step-174
 
 # --description--
 
-Looking at your `kill monster` object, `button functions` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `button text`.
+Looking at your `"kill monster"` object, `"button functions"` currently has three `goTown` variables. Replace the third one with `easterEgg` - this is how a player will access the hidden feature of the game. Do not change the `"button text"`.
 
 With this, your RPG game is complete! You can now play around - can you defeat the dragon?
 
 # --hints--
 
-You should update your fifth `locations` object to have a `button functions` property of `[goTown, goTown, easterEgg]`.
+You should update your fifth `locations` object to have a `"button functions"` property of `[goTown, goTown, easterEgg]`.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, easterEgg]);
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
@@ -557,13 +557,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
index 710dd2e3c95..f3d11a95837 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
@@ -1,13 +1,13 @@
 ---
 id: 62ba17beef16c563069a65d8
-title: Step 137
+title: Step 136
 challengeType: 0
-dashedName: step-137
+dashedName: step-136
 ---
 
 # --description--
 
-In the `locations` array, add another object at the end. Set the `name` property to `lose`, set `button text` to an array with three `REPLAY?` strings, set `button functions` to an array with three `restart` variables, and set `text` to `You die. ☠️`. You can copy that text to use the emote.
+In the `locations` array, add another object at the end. Set the `name` property to `"lose"`, set `"button text"` to an array with three `"REPLAY?"` strings, set `"button functions"` to an array with three `restart` variables, and set `text` to `"You die. &#x2620;"`.
 
 # --hints--
 
@@ -23,28 +23,28 @@ Your sixth `locations` value should be an object.
 assert.isObject(locations[5]);
 ```
 
-Your sixth `locations` value should have a `name` property with the value `lose`.
+Your sixth `locations` value should have a `name` property with the value `"lose"`.
 
 ```js
 assert.equal(locations[5].name, 'lose');
 ```
 
-Your sixth `locations` value should have a `button text` array with three `REPLAY?` strings.
+Your sixth `locations` value should have a `"button text"` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[5]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
 ```
 
-Your sixth `locations` value should have a `button functions` array with three `restart` variables.
+Your sixth `locations` value should have a `"button functions"` array with three `restart` variables.
 
 ```js
 assert.deepEqual(locations[5]["button functions"], [restart, restart, restart]);
 ```
 
-Your sixth `locations` value should have a `text` property with the value `You die. ☠️`.
+Your sixth `locations` value should have a `text` property with the value `"You die. &#x2620;"`.
 
 ```js
-assert.equal(locations[5].text, 'You die. ☠️');
+assert.equal(locations[5].text, 'You die. &#x2620;');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
index 9cb9e5ec717..031ebb6cdfb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
@@ -17,7 +17,7 @@ You should declare a `button2` variable with `const`.
 assert.match(code, /const\s+button2/);
 ```
 
-Your `button2` variable should have the value of your `#button2` element.
+Your `button2` variable should have the value of your `"#button2"` element.
 
 ```js
 assert.deepEqual(button2, document.querySelector('#button2'));
@@ -29,7 +29,7 @@ You should declare a `button3` variable with `const`.
 assert.match(code, /const\s+button3/);
 ```
 
-Your `button3` variable should have the value of your `#button3` element.
+Your `button3` variable should have the value of your `"#button3"` element.
 
 ```js
 assert.deepEqual(button3, document.querySelector('#button3'));
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
new file mode 100644
index 00000000000..432c7be3420
--- /dev/null
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
@@ -0,0 +1,356 @@
+---
+id: 65b2f6acce65b7a69751a090
+title: Step 138
+challengeType: 0
+dashedName: step-138
+---
+
+# --description--
+
+In order for the `&#x2620;` emoticon text to properly display on the page, you will need to use the <dfn>innerHTML</dfn> property.
+
+The `innerHTML` property allows you to access or modify the content inside an HTML element using JavaScript.
+
+Here is an example of updating the content for this paragraph element using the `innerHTML`  property.
+
+```html
+<p id="demo">This is a paragraph.</p>
+```
+
+```js
+document.querySelector("#demo").innerHTML = "Hello, innerHTML!";
+```
+
+In the `update` function, change `text.innerText` to `text.innerHTML`.
+
+# --hints--
+
+
+You should use dot notation to access the `innerHTML` property of `text`.
+
+```js
+assert.match(code, /text\.innerHTML/);
+```
+
+You should not use `let` or `const` to access the `innerHTML` property of `text`.
+
+```js
+assert.notMatch(code, /(let|const)\s+text.innerHTML/);
+```
+
+You should set `innerHTML` equal to the `text` property of `location`.
+
+```js
+assert.match(code, /text\.innerHTML\s*=\s*location\.text/);
+```
+
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <link rel="stylesheet" href="./styles.css">
+    <title>RPG - Dragon Repeller</title>
+  </head>
+  <body>
+    <div id="game">
+      <div id="stats">
+        <span class="stat">XP: <strong><span id="xpText">0</span></strong></span>
+        <span class="stat">Health: <strong><span id="healthText">100</span></strong></span>
+        <span class="stat">Gold: <strong><span id="goldText">50</span></strong></span>
+      </div>
+      <div id="controls">
+        <button id="button1">Go to store</button>
+        <button id="button2">Go to cave</button>
+        <button id="button3">Fight dragon</button>
+      </div>
+      <div id="monsterStats">
+        <span class="stat">Monster Name: <strong><span id="monsterName"></span></strong></span>
+        <span class="stat">Health: <strong><span id="monsterHealth"></span></strong></span>
+      </div>
+      <div id="text">
+        Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.
+      </div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+body {
+  background-color: #0a0a23;
+}
+
+#text {
+  background-color: #0a0a23;
+  color: #ffffff;
+  padding: 10px;
+}
+
+#game {
+  max-width: 500px;
+  max-height: 400px;
+  background-color: #ffffff;
+  color: #ffffff;
+  margin: 30px auto 0px;
+  padding: 10px;
+}
+
+#controls,
+#stats {
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #0a0a23;
+}
+
+#monsterStats {
+  display: none;
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #ffffff;
+  background-color: #c70d0d;
+}
+
+.stat {
+  padding-right: 10px;
+}
+
+button {
+  cursor: pointer;
+  color: #0a0a23;
+  background-color: #feac32;
+  background-image: linear-gradient(#fecc4c, #ffac33);
+  border: 3px solid #feac32;
+}
+```
+
+```js
+let xp = 0;
+let health = 100;
+let gold = 50;
+let currentWeapon = 0;
+let fighting;
+let monsterHealth;
+let inventory = ["stick"];
+
+const button1 = document.querySelector('#button1');
+const button2 = document.querySelector("#button2");
+const button3 = document.querySelector("#button3");
+const text = document.querySelector("#text");
+const xpText = document.querySelector("#xpText");
+const healthText = document.querySelector("#healthText");
+const goldText = document.querySelector("#goldText");
+const monsterStats = document.querySelector("#monsterStats");
+const monsterName = document.querySelector("#monsterName");
+const monsterHealthText = document.querySelector("#monsterHealth");
+const weapons = [
+  { name: 'stick', power: 5 },
+  { name: 'dagger', power: 30 },
+  { name: 'claw hammer', power: 50 },
+  { name: 'sword', power: 100 }
+];
+const monsters = [
+  {
+    name: "slime",
+    level: 2,
+    health: 15
+  },
+  {
+    name: "fanged beast",
+    level: 8,
+    health: 60
+  },
+  {
+    name: "dragon",
+    level: 20,
+    health: 300
+  }
+]
+const locations = [
+  {
+    name: "town square",
+    "button text": ["Go to store", "Go to cave", "Fight dragon"],
+    "button functions": [goStore, goCave, fightDragon],
+    text: "You are in the town square. You see a sign that says \"Store\"."
+  },
+  {
+    name: "store",
+    "button text": ["Buy 10 health (10 gold)", "Buy weapon (30 gold)", "Go to town square"],
+    "button functions": [buyHealth, buyWeapon, goTown],
+    text: "You enter the store."
+  },
+  {
+    name: "cave",
+    "button text": ["Fight slime", "Fight fanged beast", "Go to town square"],
+    "button functions": [fightSlime, fightBeast, goTown],
+    text: "You enter the cave. You see some monsters."
+  },
+  {
+    name: "fight",
+    "button text": ["Attack", "Dodge", "Run"],
+    "button functions": [attack, dodge, goTown],
+    text: "You are fighting a monster."
+  },
+  {
+    name: "kill monster",
+    "button text": ["Go to town square", "Go to town square", "Go to town square"],
+    "button functions": [goTown, goTown, goTown],
+    text: 'The monster screams "Arg!" as it dies. You gain experience points and find gold.'
+  },
+  {
+    name: "lose",
+    "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
+    "button functions": [restart, restart, restart],
+    text: "You die. &#x2620;"
+  }
+
+];
+
+// initialize buttons
+button1.onclick = goStore;
+button2.onclick = goCave;
+button3.onclick = fightDragon;
+
+function update(location) {
+  --fcc-editable-region--
+  monsterStats.style.display = "none";
+  button1.innerText = location["button text"][0];
+  button2.innerText = location["button text"][1];
+  button3.innerText = location["button text"][2];
+  button1.onclick = location["button functions"][0];
+  button2.onclick = location["button functions"][1];
+  button3.onclick = location["button functions"][2];
+  text.innerText = location.text;
+  --fcc-editable-region--
+}
+
+function goTown() {
+  update(locations[0]);
+}
+
+function goStore() {
+  update(locations[1]);
+}
+
+function goCave() {
+  update(locations[2]);
+}
+
+function buyHealth() {
+  if (gold >= 10) {
+    gold -= 10;
+    health += 10;
+    goldText.innerText = gold;
+    healthText.innerText = health;
+  } else {
+    text.innerText = "You do not have enough gold to buy health.";
+  }
+}
+
+function buyWeapon() {
+  if (currentWeapon < weapons.length - 1) {
+    if (gold >= 30) {
+      gold -= 30;
+      currentWeapon++;
+      goldText.innerText = gold;
+      let newWeapon = weapons[currentWeapon].name;
+      text.innerText = "You now have a " + newWeapon + ".";
+      inventory.push(newWeapon);
+      text.innerText += " In your inventory you have: " + inventory;
+    } else {
+      text.innerText = "You do not have enough gold to buy a weapon.";
+    }
+  } else {
+    text.innerText = "You already have the most powerful weapon!";
+    button2.innerText = "Sell weapon for 15 gold";
+    button2.onclick = sellWeapon;
+  }
+}
+
+function sellWeapon() {
+  if (inventory.length > 1) {
+    gold += 15;
+    goldText.innerText = gold;
+    let currentWeapon = inventory.shift();
+    text.innerText = "You sold a " + currentWeapon + ".";
+    text.innerText += " In your inventory you have: " + inventory;
+  } else {
+    text.innerText = "Don't sell your only weapon!";
+  }
+}
+
+function fightSlime() {
+  fighting = 0;
+  goFight();
+}
+
+function fightBeast() {
+  fighting = 1;
+  goFight();
+}
+
+function fightDragon() {
+  fighting = 2;
+  goFight();
+}
+
+function goFight() {
+  update(locations[3]);
+  monsterHealth = monsters[fighting].health;
+  monsterStats.style.display = "block";
+  monsterName.innerText = monsters[fighting].name;
+  monsterHealthText.innerText = monsterHealth;
+}
+
+function attack() {
+  text.innerText = "The " + monsters[fighting].name + " attacks.";
+  text.innerText += " You attack it with your " + weapons[currentWeapon].name + ".";
+  health -= monsters[fighting].level;
+  monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1;
+  healthText.innerText = health;
+  monsterHealthText.innerText = monsterHealth;
+   if (health <= 0) {
+    lose();
+  } else if (monsterHealth <= 0) {
+    if (fighting === 2) {
+      winGame();
+    } else {
+      defeatMonster();
+    }
+  }
+}
+
+function dodge() {
+  text.innerText = "You dodge the attack from the " + monsters[fighting].name;
+}
+
+function defeatMonster() {
+  gold += Math.floor(monsters[fighting].level * 6.7);
+  xp += monsters[fighting].level;
+  goldText.innerText = gold;
+  xpText.innerText = xp;
+  update(locations[4]);
+}
+
+function lose() {
+  update(locations[5]);
+}
+
+function restart() {
+  xp = 0;
+  health = 100;
+  gold = 50;
+  currentWeapon = 0;
+  inventory = ["stick"];
+  goldText.innerText = gold;
+  healthText.innerText = health;
+  xpText.innerText = xp;
+  goTown();
+}
+```
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
index 34546638df9..9ca2ac2a95b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
@@ -22,21 +22,21 @@ You should use bracket notation to access the property of `totalCountPerProduct`
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 You should use the assignment operator to update the value of the property of `totalCountPerProduct` that corresponds to `dessert.id`.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=/);
 ```
 
 You should update the value of `totalCountPerProduct` to be the current value plus one.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\+\s*1/);
 ```
 
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
index 72fdf1225c0..5ce06fca3a7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
@@ -17,28 +17,28 @@ You should wrap your right-hand `totalCountPerProduct[dessert.id]` in parenthese
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 You should use the `||` operator.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*/);
 ```
 
 You should use `0` as your fallback value.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
 ```
 
 You should still add `1` to the value.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
index 3a03631419f..8fcac7a2729 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
@@ -29,7 +29,7 @@ You should assign the value of `totalCountPerProduct[product.id]` to `currentPro
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\[product\.id\]/);
+assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\s*\[\s*product\.id\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
index 6d59ec9cf5c..803de03481c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
@@ -32,7 +32,7 @@ assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*
 You should add an empty callback function to the event listener. Remember to give it an `event` parameter.
 
 ```js
-assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*\s*\}\s*\)/);
+assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*;?\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
index 1018c675a32..aac90dfd588 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
@@ -53,7 +53,7 @@ Your `reduce` call should have an initial value of `0`.
 
 ```js
 const afterCalculateTotal = code.split('calculateTotal')[1];
-assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(total,\s*item\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
+assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(\s*total,\s*item\s*\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
index efd4d3c5fc1..76acc523303 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
@@ -37,7 +37,6 @@ assert.match(afterCalculateTaxes, /amount\s*\*\s*\(\s*this\s*\.\s*taxRate\s*\/\s
 Your `calculateTaxes` method should return the value of the `taxRate` (divided by 100, to convert it to a percent) multiplied by the `amount` parameter.
 
 ```js
-console.log(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 assert.equal(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 ```
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
index 585480adcb4..70ca08e6abe 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
@@ -19,37 +19,37 @@ Start by accessing the `#playlist-songs`, `#play`, and `#pause` elements with th
 You should use `document.getElementById()` to get the `#playlist-songs` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should assign the `#playlist-songs` element to the variable `playlistSongs`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#play` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should assign the `#play` element to the variable `playButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#pause` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 You should assign the `#pause` element to the variable `pauseButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
index 4fc9cad2d96..5737f806392 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
@@ -16,37 +16,37 @@ Assign them to variables named `nextButton`, `previousButton`, and `shuffleButto
 You should use `document.getElementById()` to get the `#next` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should assign the `#next` element to the variable `nextButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#previous` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should assign the `#previous` element to the variable `previousButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#shuffle` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 You should assign the `#shuffle` element to the variable `shuffleButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
index 1942bbc71b8..2a589c04e9d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
@@ -18,13 +18,13 @@ Use `const` to create a variable named `audio` and set it equal to `new Audio()`
 You should use the `new` keyword to create an instance of the `Audio` object.
 
 ```js
-assert.match(code, /new\s+Audio\(\);?/)
+assert.match(code, /new\s+Audio\(\s*\);?/)
 ```
 
 You should assign the `Audio` object to a constant named `audio`.
 
 ```js
-assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\);?/)
+assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
index b5e196ef3a9..98a5a4486e0 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
@@ -34,7 +34,7 @@ assert.match(code, /userData\?\.songs\.find\(/)
 Your `find` method should have `song` as the parameter of its arrow function callback.
 
 ```js
-assert.match(code, /userData\?\.songs\.find\(\(?song\)?/)
+assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 Your `find` method should use strict equality to check if `song.id` is equal to `id`.
@@ -46,7 +46,7 @@ assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(so
 Your `find` method should be assigned to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\);?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
index cc8d7cad23b..515926e429a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
@@ -13,22 +13,22 @@ Also, set the `audio.title` property equal to `song.title`. This tells the audio
 
 # --hints--
 
-You should not modify the exist `playSong` function and its content.
+You should not modify the existing `playSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?/)
 ```
 
 You should set `audio.src` to `song.src`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?/)
 ```
 
 You should set `audio.title` to `song.title`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
index 10ae68b0257..67a86e7b8a2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
@@ -17,13 +17,13 @@ Add an `if` statement to check whether the `userData?.currentSong` is `null` or
 You should create an `if` statement with the condition `userData?.currentSong === null || userData?.currentSong.id !== song.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*/)
 ```
 
 You should set `audio.currentTime` to `0` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
index e6646c258c5..7ab072b4453 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
@@ -11,9 +11,11 @@ You need to update the current song being played as well as the appearance of th
 
 Start by accessing the `userData` object and its `currentSong` property. Set its value equal to the `song` variable.
 
+*Note*: You should not use the optional chaining operator `?.` in this step because `userData.currentSong` will not be `null` or `undefined` at this point.
+
 # --hints--
 
-You should set `userData.currentSong` to `song`.
+You should assign `song` to `userData.currentSong`.
 
 ```js
 assert.match(code, /userData\.currentSong\s*=\s*song;?/)
@@ -614,7 +616,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   --fcc-editable-region--
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
index 0401f9fdb3a..9c7ef28725e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
@@ -7,9 +7,9 @@ dashedName: step-33
 
 # --description--
 
-You need to hook up the `playSong` function to a `click` event listener so the songs will start playing when the play button is clicked.
+In previous steps you built out the functionality for playing a song. Now you need to add the functionality to the play button so that it will play the current song when it is clicked on.
 
-Add a click event listener to the `playButton` element, then use arrow syntax to pass in a callback with an empty pair of curly braces.
+Use the `addEventListener()` method and pass in a `click` event for the first argument and an empty callback function with arrow syntax for the second argument, e.g., `() => {}`.
 
 # --hints--
 
@@ -22,13 +22,13 @@ assert.match(code, /playButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback into your event listener. Don't forget you also need an empty pair of curly braces.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
index bdc6878d148..907db26fdb0 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+songsHTML/);
 You should assign `array.map()` to your `songsHTML`.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\)/);
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
index 58fc5b47706..8251e5bcab8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
@@ -32,7 +32,7 @@ assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\
 You should interpolate `song.title` as the content of your `span` element.
 
 ```js
-assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\$\{song\.title\}\s*<\/span>\s*<\/button>/)
+assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\s*\$\{\s*song\.title\s*\}\s*<\/span>\s*<\/button>/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
index 24d3157516e..e441d3ae74c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
@@ -24,7 +24,7 @@ assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*/)
 Your button element should have an `aria-label` attribute with the value `Delete ${song.title}` as its second attribute and value.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2\s*>/)
 ```
 
 You should paste in the provided `svg` as the content of your `button` element.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
index 9fee0a23673..33df8be75e6 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
@@ -24,7 +24,7 @@ Chain the `join()` method to your `map()` method and pass in an empty string for
 You should add `join("")` to the existing code.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\)\s*\.join\(('|")\3\);?/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\s*\)\s*\.join\(\s*('|")\3\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
index 163d1b1dcd8..85bc14113c9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
@@ -35,7 +35,7 @@ Call the `renderSongs` function with the `songs` property of `userData`. This wi
 You should call your `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /renderSongs\(userData\?\.songs\)/)
+assert.match(code, /renderSongs\(\s*userData\?\.songs\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
index 37ce37ab58c..782513fc63d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
@@ -9,20 +9,20 @@ dashedName: step-34
 
 Within the arrow function of the event listener, add an `if` to check if `userData?.currentSong` is `null`.
 
-Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData.songs` array. This will ensure the first song in the playlist is played first.
+Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData?.songs` array. This will ensure the first song in the playlist is played first.
 
 # --hints--
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
index f53e2440b6e..da096ca7311 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
@@ -16,20 +16,20 @@ This ensures that the currently playing song will continue to play when the play
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` block to your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.currentSong.id` in the `else` block of your `if` statement.
 
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*playSong\(userData\?\.currentSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*playSong\(\s*userData\?\.currentSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -627,7 +627,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
index da45b68bbb8..886ebe9b4f7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
@@ -28,13 +28,13 @@ assert.isFunction(pauseSong)
 Your `pauseSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `pauseSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
index ad3a24480dc..644f230aafd 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
@@ -9,15 +9,17 @@ dashedName: step-38
 
 To store the current time of the song when it is paused, set the `songCurrentTime` of the `userData` object to the `currentTime` of the `audio` variable.
 
+*Note*: You should not use optional chaining for this step because `userData.songCurrentTime` will not be `null` or `undefined` at this point.
+
 # --hints--
 
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
-You should set `userData.songCurrentTime` to `audio.currentTime`.
+You should assign `audio.currentTime` to `userData.songCurrentTime`.
 
 ```js
 assert.match(code, /userData\.songCurrentTime\s*=\s*audio\.currentTime;?/)
@@ -618,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
index 084d7903b64..5c746f012ad 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
@@ -16,19 +16,19 @@ To finally pause the song, use the `pause()` method on the `audio` variable. `pa
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `classList` property and the `remove()` method to remove the class `playing` from the `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.remove\(('|")playing\1\);?/)
+assert.match(code, /playButton\.classList\.remove\(\s*('|")playing\1\s*\);?/)
 ```
 
 You should use the `pause()` method on your `audio` variable.
 
 ```js
-assert.match(code, /audio\.pause\(\)/)
+assert.match(code, /audio\.pause\(\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
index 50eb5623bfc..46c858c0ced 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
@@ -22,13 +22,13 @@ assert.match(code, /pauseButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `pauseSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1,\s*pauseSong\)/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1,\s*pauseSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
index 073153f652a..7e056f42c8b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
@@ -16,13 +16,13 @@ To finally play the song, use the `play()` method on the `audio` variable. `play
 You should use the `classList` property and the `add` method to add the class `playing` to `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.add\(("|')playing\1\);?/)
+assert.match(code, /playButton\.classList\.add\(\s*("|')playing\1\s*\);?/)
 ```
 
 You should use the `play()` method on the `audio` variable.
 
 ```js
-assert.match(code, /audio\.play\(\);?/)
+assert.match(code, /audio\.play\(\s*\);?/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
 
   userData.currentSong = song;
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
index 94471f680e9..d92027a1584 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
@@ -28,13 +28,13 @@ assert.isFunction(playNextSong)
 Your `playNextSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playNextSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
index 3a09a7bca18..e230e64f8d4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
@@ -9,30 +9,30 @@ dashedName: step-44
 
 Inside the `playNextSong` function, create an `if` statement to check if the `currentSong` of `userData` is strictly equal to `null`. This will check if there's no current song playing in the `userData` object.
 
-If the condition is true, call the `playSong` function with the `id` of the first song in the `userData.songs` array as an argument.
+If the condition is true, call the `playSong` function with the `id` of the first song in the `userData?.songs` array as an argument.
 
 # --hints--
 
 You should not modify the existing `playNextSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside the `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
index be00e858018..d9ad3536a1d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
@@ -14,25 +14,25 @@ Add an `else` block to the `if` statement. Inside the `else` block, call the `ge
 You should not modify the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` to the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 You should set the `currentSongIndex` constant to `getCurrentSongIndex()` inside the `else` block.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*\}/)
 ```
 
 
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -678,7 +678,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
index 806d05361eb..784debc46e2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
@@ -18,25 +18,25 @@ Lastly, call the `playSong` function and pass in `nextSong.id` as the argument.
 You should not modify the existing `if` statement, its `else` block, and content.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex + 1]` to a `nextSong` constant.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `nextSong.id`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*playSong\(nextSong\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*playSong\(\s*nextSong\.id\s*\);?\s*\}/)
 ```
 
 
@@ -635,7 +635,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
index ca275105099..df943dc9bbd 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
@@ -22,13 +22,13 @@ assert.match(code, /nextButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playNextSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1,\s*playNextSong\)/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1,\s*playNextSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -675,7 +675,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
index 1ae8659738e..bea60b88686 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
@@ -26,13 +26,13 @@ assert.isFunction(playPreviousSong)
 Your `playPreviousSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playPreviousSong` function should be empty.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
index 8defbd55ff2..959f25c1e87 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
@@ -16,31 +16,31 @@ Inside the `else` block, create a constant named `currentSongIndex` and assign i
 You should not alter the existing `playPreviousSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should have an `if` statement with the condition `userData?.currentSong === null` inside your `playPreviousSong` function.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*/)
 ```
 
 You should have `return` inside the block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
 ```
 
 You should call `getCurrentSongIndex` and assign it to `currentSongIndex` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -695,7 +695,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
index 7755c3cc7f8..e33851d4da0 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
@@ -14,19 +14,19 @@ To get the previous song, subtract `1` from the `currentSongIndex` of `userData?
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex - 1]` to a `previousSong` constant.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `previousSong.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*playSong\(previousSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*playSong\(\s*previousSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
index 56c1ca2ca97..b8bd6e1b05a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
@@ -20,13 +20,13 @@ assert.match(code, /previousButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playPreviousSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1,\s*playPreviousSong\)/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1,\s*playPreviousSong\s*\)/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
index 1fae6823e5c..2b6e1933adb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
@@ -28,19 +28,19 @@ assert.isFunction(highlightCurrentSong)
 Your `highlightCurrentSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*/)
 ```
 
 You should create a `playlistSongElements` constant inside your `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
 ```
 
 You should use the `querySelectorAll()` method to select the `.playlist-song` element and assign it to the `playlistSongElements` constant.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*\};?/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
index cf5cea058b8..ddebe0036e7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
@@ -22,7 +22,7 @@ assert.isFunction(getCurrentSongIndex);
 Your `getCurrentSongIndex` function should use arrow syntax.
 
 ```js
-assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\)\s*=>\s*{\s*}\s*/);
+assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*/);
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
index 5139d7dec71..20356c78f27 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
@@ -16,7 +16,7 @@ Use `getElementById()` to get the `id` of the currently playing song, then use t
 You should not modify the existing `highlightCurrentSong` function and its content.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*/)
 ```
 
 You should use `document.getElementById()` and pass in `` `song-${userData?.currentSong?.id}` ``.
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -692,7 +692,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
index 0a48e000e5f..188985175f1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
@@ -33,13 +33,13 @@ assert.match(code, /playlistSongElements\.forEach\(/)
 Your `forEach()` method should have a `songEl` parameter and use arrow syntax.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*/)
 ```
 
 Your `forEach` should have an empty pair of curly braces.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -637,7 +637,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
index 6c623ed29f1..33154d47fd2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
@@ -16,19 +16,19 @@ Create an `if` statement with the condition `songToHighlight`. For the statement
 You should create an `if` statement with the condition `songToHighlight`.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*/)
 ```
 
 You should use the `setAttribute()` method on `songToHighlight` inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(/)
 ```
 
 You should pass in `"aria-current"` and `"true"` as the first and second argument of your `setAttribute` method.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\)\s*;?\s*\}?/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\s*\)\s*;?\s*\}?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
index 70926cb55eb..d868a47d3da 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
@@ -16,7 +16,7 @@ After that, play around with the control buttons to see how the `highlightCurren
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /highlightCurrentSong\(\)/)
+assert.match(code, /highlightCurrentSong\(\s*\)/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -688,7 +688,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
index 8779d52150f..83ab374e672 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
@@ -26,13 +26,13 @@ assert.isFunction(setPlayerDisplay)
 Your `setPlayerDisplay` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayerDisplay` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
index b86ca094589..08e527b16ed 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
@@ -16,31 +16,31 @@ Access the `#player-song-title` and `#player-song-artist` elements with the `get
 You should not modify the existing `setPlayerDisplay` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use `document.getElementById()` to get the `#player-song-title` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should assign the `#player-song-title` element to the variable `playingSong`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should use `document.getElementById()` to get the `#player-song-artist` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 You should assign the `#player-song-artist` element to the variable `songArtist`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -716,7 +716,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
index 00c06189100..fca02e445e5 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -710,7 +710,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
index 341dc994d28..4d48b11a6b5 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -725,7 +725,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
index ba574153146..257faf6e2ca 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
@@ -16,7 +16,7 @@ Now you should see the song title and the artist show up in the display.
 You should call the `setPlayerDisplay` function inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayerDisplay\(\);?/)
+assert.match(code, /setPlayerDisplay\(\s*\);?/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
index 53c32804f94..2b515c53c55 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
@@ -28,13 +28,13 @@ assert.isFunction(setPlayButtonAccessibleText)
 Your `setPlayButtonAccessibleText` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayButtonAccessibleText` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -719,7 +719,7 @@ const renderSongs = (array) => {
 
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
index d9060dbf4b5..b2042f0f73f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
@@ -16,19 +16,19 @@ Don't forget to use optional chaining.
 You should not modify the existing `setPlayButtonAccessibleText` and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should access `userData?.currentSong` or `userData?.songs[0]`.
 
 ```js
-assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 You should assign `userData?.currentSong || userData?.songs[0]` to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -715,7 +715,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
index 4fb7a838379..16d38c609be 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
@@ -16,7 +16,7 @@ Don't forget you need template interpolation here, so you need to use backticks.
 You should not modify the existing `setPlayButtonAccessibleText` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `setAttribute()` method on `playButton`.
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
index ba7c5e61028..f3d74dd19b8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
@@ -14,7 +14,7 @@ Now, call the `setPlayButtonAccessibleText` function inside the `playSong` funct
 You should call the `setPlayButtonAccessibleText` inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayButtonAccessibleText\(\);?/)
+assert.match(code, /setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -707,7 +707,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
index 6c8ba26842c..4b17ba85ce6 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
@@ -28,13 +28,13 @@ assert.isFunction(shuffle)
 Your `shuffle` function should use an arrow syntax and should not take a parameter.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `shuffle` function  should be empty.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -729,7 +729,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
index e60b96c198b..a7095844fa8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
@@ -24,7 +24,7 @@ Use the `sort()` method on the `userData?.songs` array. Pass a callback to the m
 You should not modify the existing `shuffle` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*{\s*[\s\S]*?\};?/);
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*{\s*[\s\S]*?\};?/);
 ```
 
 You should use the `sort()` method on `userData?.songs`.
@@ -42,7 +42,7 @@ assert.match(code, /userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*/)
 The callback of your `sort()` method should return `Math.random() - 0.5`.
 
 ```js
-assert.match(code, /userData\?.songs\.sort\s*\(\(\)\s*=>(\s*{\s*return\s+Math\.random\(\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\)\s*-\s*0\.5\s*)\);?/);
+assert.match(code, /userData\?.songs\.sort\s*\(\s*\(\s*\)\s*=>(\s*{\s*return\s+Math\.random\(\s*\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\s*\)\s*-\s*0\.5\s*)\s*\);?/);
 ```
 
 # --seed--
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -739,7 +739,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
index c6a499d35c0..7ce33d0af1d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
@@ -11,6 +11,8 @@ When the shuffle button is pressed, you want to set the `currentSong` to nothing
 
 Set `userData.currentSong` to `null` and `userData.songCurrentTime` to `0`.
 
+*Note*: You should not use optional chaining for this step because you are explicitly setting the `currentSong` and `songCurrentTime` properties to be `null` and `0` respectively.
+
 # --hints--
 
 You should set `userData.currentSong` to `null`.
@@ -620,7 +622,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -720,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
index 1c7afa9e4ab..b96ff033825 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
@@ -16,31 +16,31 @@ Call the `renderSongs` function and pass in `userData?.songs` as an argument. Al
 You should not modify the existing `shuffle` function and its content.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -741,7 +741,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
index ff48725965e..f6c776d84cc 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
@@ -22,13 +22,13 @@ assert.match(code, /shuffleButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 You should pass in `shuffle` as the second value of your `click` event listener.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1,\s*shuffle\);?/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1,\s*shuffle\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
index 4be1c2e5c60..21ff9a7ee20 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -746,7 +746,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
index df83a3f199b..575eaa37d17 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
@@ -7,7 +7,7 @@ dashedName: step-73
 
 # --description--
 
-Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData.songs` array.
+Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData?.songs` array.
 
 The `filter` method keeps only the elements of an array that satisfy the callback function passed to it:
 
@@ -20,12 +20,14 @@ console.log(numsGreaterThanThree) // Output: [10, 8, 4, 5]
 
 Use the `filter()` method on `userData?.songs`. Pass in `song` as the parameter of the arrow function callback and use implicit return to check if `song.id` is strictly not equal to `id`. Assign all of that to the `userData.songs`.
 
+*Note*: You should not use optional chaining when you assign the result of  `userData?.songs.filter` to `userData.songs` because the `allSongs` array will not be `undefined` or `null` at that point.
+
 # --hints--
 
 You should not modify the existing `deleteSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should use the `filter()` method on `userData?.songs`.
@@ -647,7 +649,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -757,7 +759,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
index f4ad4eb93f1..3fbf6cee8db 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
@@ -18,25 +18,25 @@ After that, call the `highlightCurrentSong` function to highlight the current so
 You should not modify the existing `deleteSong` function and its content.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -634,7 +634,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -745,7 +745,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
index b14e03b4995..149d6566984 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
@@ -16,7 +16,7 @@ Use an `if` statement to check if the `userData?.currentSong?.id` is equal to th
 You should create an empty `if` statement with the condition `userData?.currentSong?.id === id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
index 7d86ffcc95a..d47a6934ec2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
@@ -16,31 +16,31 @@ After that, call the `pauseSong()` function to stop the playback and the `setPla
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.currentSong` to `null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should set `userData.songCurrentTime` to `0`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*.*\s*\}/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -755,7 +755,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
index 79f50eff3ca..685af8a458e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
@@ -9,14 +9,14 @@ dashedName: step-78
 
 Next, you need to check if the playlist is empty. If it is, you should reset the `userData` object to its original state.
 
-Use an `if` statement to check if the `userData.songs` has a length of `0`.
+Use an `if` statement to check if the `userData?.songs` has a length of `0`.
 
 # --hints--
 
-You should create an empty `if` statement with the condition `userData.songs.length === 0`
+You should create an empty `if` statement with the condition `userData?.songs.length === 0`.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -738,7 +738,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
index a34f5a86788..70c1cdc3b48 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
@@ -33,19 +33,19 @@ Inside your `if` statement, declare a `resetButton` constant, then use `createEl
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*.*\s*\}/)
 ```
 
 You should use the `createElement` method to create a `button`.
 
 ```js
-assert.match(code, /document\.createElement\(('|")button\1\);?/)
+assert.match(code, /document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 You should assign your newly created `button` element to a `resetButton` constant.
 
 ```js
-assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?/)
+assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 # --seed--
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -708,7 +708,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
 
   }
 --fcc-editable-region--
@@ -769,7 +769,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
index ece7ed69ba2..046a196d48a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
@@ -18,7 +18,7 @@ Set the `id` attribute of `resetButton` to `reset` and its `aria-label` attribut
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should use `resetButton.id` to create an `id` attribute named `reset` for the `resetButton`.
@@ -628,7 +628,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
index aba3434bfd1..a0c8f96a879 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
@@ -32,7 +32,7 @@ assert.match(code, /resetButton\.appendChild\(/)
 You should pass in `resetText` as the value of your first `appendChild()`.
 
 ```js
-assert.match(code, /resetButton\.appendChild\(resetText\);?/)
+assert.match(code, /resetButton\.appendChild\(\s*resetText\s*\);?/)
 ```
 
 You should use the `appendChild()` method on `playlistSongs`.
@@ -44,7 +44,7 @@ assert.match(code, /playlistSongs\.appendChild\(/)
 You should pass in `resetButton` as the value of your second `appendChild()`.
 
 ```js
-assert.match(code, /playlistSongs\.appendChild\(resetButton\);?/)
+assert.match(code, /playlistSongs\.appendChild\(\s*resetButton\s*\);?/)
 ```
 
 # --seed--
@@ -642,7 +642,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -773,7 +773,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
index d3c9d0bae06..7add1800efc 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
@@ -22,13 +22,13 @@ assert.match(code, /resetButton\.addEventListener\(/)
 Your `resetButton` event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 The callback function of your event listener should use arrow syntax and have an empty pair of curly braces.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -690,7 +690,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -760,7 +760,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
index 609651ac217..6b3fb0daef5 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
@@ -7,22 +7,22 @@ dashedName: step-84
 
 # --description--
 
-You need to assign the `userData.songs` property to the initial `allSongs` array. This will reset the playlist to its original state.
+To reset the playlist to its original state, spread `allSongs` into an array and assign it to `userData.songs`.
 
-Spread `allSongs` into an array and assign it to `userData.songs`.
+*Note*: You should not use optional chaining for the `userData.songs` because the song will not be `null` or `undefined` at this point.
 
 # --hints--
 
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\s*\);?/)
 ```
 
 You should assign `[...allSongs]` to `userData.songs`.
 
 ```js
-assert.match(code, /userData\.songs\s*=\s*\[\.\.\.allSongs\]/)
+assert.match(code, /userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -684,7 +684,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
index a90427d17a0..61ab6bc60db 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
@@ -22,25 +22,25 @@ Remove the reset button from the playlist by calling the `remove()` method on th
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*.*\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*.*\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
 You should use the `remove()` method to remove the `resetButton` from the DOM.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*resetButton\.remove\(\);?\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*resetButton\.remove\(\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -702,7 +702,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -776,7 +776,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
index 7560af1b122..fbf0c58a3f1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
@@ -24,13 +24,13 @@ assert.match(code, /audio\.addEventListener\(/)
 The event listener you used on on your `audio` variable should listen for an `ended` event.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback to your `ended` event listener.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 
@@ -629,7 +629,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -768,7 +768,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
index cb7904dd783..989c109efba 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
@@ -7,14 +7,14 @@ dashedName: step-77
 
 # --description--
 
-Within the button element in the `renderSongs` function, add an `onclick` attribute as the first attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
+Within the button element in the `renderSongs` function, add an `onclick` attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
 
 # --hints--
 
-You should add an `onclick` attribute as the first attribute of the delete button and pass in `deleteSong(${song.id})`.
+You should add an `onclick` attribute to the delete button and pass in `deleteSong(${song.id})`.
 
 ```js
-assert.match(code, /<button\s+onclick=('|")deleteSong\(\$\{song\.id\}\)\1\s*class=('|")playlist-song-delete\2\s*aria-label=('|")Delete\s*\$\{song\.title\}\3\s*>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")deleteSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
index fad2b730808..6658d88ea53 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
@@ -7,30 +7,35 @@ dashedName: step-87
 
 # --description--
 
-Notice that the album art in the HTML and songs in the `allSongs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
+Notice that the album art in the HTML and songs in the `userData.songs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
 
 Next, you need to check if there is a next song to play. Retrieve the current song index by calling the `getCurrentSongIndex()` function, and save it in a `currentSongIndex` constant.
 
-After that, create a `nextSongExists` constant that checks if a next song exists.
+After that, create a `nextSongExists` constant that contains the boolean value `true` or `false` depending on if the next song exists.
 
 # --hints--
 
 You should not modify the existing `ended` event listener and its content.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should create a `currentSongIndex` constant and set it to the calling of the `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
-You should check if a next song exists with `userData?.songs[currentSongIndex + 1] !== undefined` and set it to a `nextSongExists` constant.
+You should check if a next song exists comparing `userData.songs.length` and `currentSongIndex` and set it to a `nextSongExists` constant. If the last index of the songs array (`userData.songs.length - 1`) is bigger than the currentSongIndex that means there is a next song.
 
 ```js
-assert.match(code, /const\s+nextSongExists\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\]\s*!==\s*undefined;?/)
+const secondPart = code.split(`audio.addEventListener("ended", () => {`)[1];
+const middlePart = secondPart.split("});")[0]
+const codeOutputFirstTest = eval(middlePart + "\nnextSongExists;");
+assert.strictEqual(codeOutputFirstTest, true);
+const codeOutputSecondTest = eval(`\nfunction getCurrentSongIndex() { return 100; };\n` + middlePart + "\nnextSongExists;")
+assert.strictEqual(codeOutputSecondTest, false);
 ```
 
 # --seed--
@@ -593,7 +598,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -657,7 +662,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -732,7 +737,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
index 9b9730ae86e..c2706c6b55a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
@@ -14,13 +14,13 @@ Use an `if` statement to check if `nextSongExists` exists, then call the `playNe
 You should create an `if` statement with the condition `nextSongExists`.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*/)
 ```
 
 You should call the `playNextSong` function inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -583,7 +583,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -647,7 +647,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
index 0d3c1e988af..c9c231160f0 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
@@ -14,25 +14,25 @@ If there is no next song in the playlist, use the `else` block to reset the `cur
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `currentSong` property of `userData` to `null` in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `songCurrentTime` property of `userData` to `0` in the `else` block of your `if`statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
 ```
 
 # --seed--
@@ -595,7 +595,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -659,7 +659,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
index 18523d8a394..e50926ca778 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
@@ -17,28 +17,28 @@ You should call the `pauseSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /pauseSong\(\);?/)
+assert.match(splitter[1], /pauseSong\(\s*\);?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /setPlayerDisplay\(\);?/)
+assert.match(splitter[1], /setPlayerDisplay\(\s*\);?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -636,7 +636,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -775,7 +775,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
@@ -1418,7 +1418,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -1482,7 +1482,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -1557,7 +1557,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
index d6f96c15506..022ab854629 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
@@ -26,7 +26,7 @@ Inside the `userData` object create a `songs` property. For the value, spread `a
 Your `userData` object should have a `songs` key set to `[...allSongs]`.
 
 ```js
-assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\],?/);
+assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\]\s*,?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
index 2e56457ba1c..8e59639cf44 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
@@ -14,7 +14,7 @@ To handle the current song's information and track its playback time, create a `
 You should not modify the existing `userData` object and its content.
 
 ```js
-assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\.\.\.allSongs\],?\s*/);
+assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\s*\.\.\.allSongs\s*\]\s*,?\s*/);
 ```
 
 Your `userData` object should have a `currentSong` key set to `null`.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
index 02779685164..43711e6a0bb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
@@ -9,26 +9,26 @@ dashedName: step-30
 
 Add an `else` block to handle the current song's position in the playlist.
 
-Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData.songCurrentTime`.
+Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData?.songCurrentTime`.
 
 # --hints--
 
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 You should add an `else` block to the existing `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
 ```
 
-You should set `audio.currentTime` to `userData.songCurrentTime` inside the `else` block of your `if` statement.
+You should set `audio.currentTime` to `userData?.songCurrentTime` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\.songCurrentTime;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\?\.songCurrentTime;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
index f0bb27a1ab3..12f7348b65f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
@@ -20,7 +20,7 @@ assert.match(code, /playlistSongElements\.forEach\(\s*(\(\s*songEl\s*\)|songEl)\
 You should use the `removeAttribute()` method on `songEl` and pass in `"aria-current"`.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(('|")aria-current\1\);?\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(\s*('|")aria-current\1\s*\);?\s*\}\s*\);?/)
 ```
 
 
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -691,7 +691,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
index 87d6a769bd9..20fdfb29c33 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
@@ -13,10 +13,10 @@ Don't forget you need to interpolate with the dollar sign here.
 
 # --hints--
 
-You should add an `onclick` with the value `playSong(${song.id})` as the second attribute and value of the `button` element.
+You should add an `onclick` attribute with the value `playSong(${song.id})` to the `button` element.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-info\1\s*onclick\s*=\s*('|")playSong\(\$\{song\.id\}\)\2\s*>\s*<span\s+class\s*=\s*('|")playlist-song-title\3\s*>\$\{song\.title\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-artist\4\s*>\$\{song\.artist\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-duration\5\s*>\$\{song\.duration\}<\/span>\s*<\/button>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")playSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
index 54adb10762d..723e12d5b94 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
@@ -28,19 +28,19 @@ Use the `createTextNode()` method to create a `Reset Playlist` text, then assign
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*\}/)
 ```
 
 You should use `document.createTextNode()` to create a `Reset Playlist` text.
 
 ```js
-assert.match(code, /document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 You should assign your created text node to a `resetText` constant.
 
 ```js
-assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -703,7 +703,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
 
 
@@ -766,7 +766,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
index 2a0560df690..169edb2ecce 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
@@ -23,13 +23,13 @@ Pass in a callback function to the `map()` method. The callback function should
 The callback function of your `map()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?.*\)?\s*=>\s*\{\s*\}\)/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(.*\)|[^()]+)\s*=>\s*\{\s*\}\s*\)/)
 ```
 
 Your `map()` method should have a `song` parameter in it's callback function.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?song\)?/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
index 984e68068fd..0020b3e15f2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
@@ -14,20 +14,20 @@ const animals = ["dog", "cat", "horse"];
 animals.indexOf("cat") // 1
 ```
 
-Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData.currentSong`.
+Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData?.currentSong`.
 
 # --hints--
 
 You should return `userData?.songs.indexOf()` inside your `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\()|(\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(|\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
 ```
 
-You should pass in `userData.currentSong` into the `indexOf()` method.
+You should pass in `userData?.currentSong` into the `indexOf()` method.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\(userData\.currentSong\);?)|(\s*{\s*return\s+userData\?\.songs\.indexOf\(userData\.currentSong\);?)/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?|\s*{\s*return\s+userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?\s*})/)
 ```
 
 # --seed--
@@ -625,7 +625,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
index 091a2394b79..0afd55838e8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
@@ -23,7 +23,7 @@ Add the `sort()` method to `userData?.songs`.
 You should add the `sort()` method to `userData?.songs`.
 
 ```js
-assert.match(code, /userData\?\.songs\.sort\(*.\);?/);
+assert.match(code, /userData\?\.songs\.sort\(.*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
index d8520c47f8b..c8ec9c1f9df 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
@@ -18,25 +18,25 @@ The variables will not change, so use `const` to declare them.
 You should use `document.getElementById()` to get the `#author-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 You should assign the `#author-container` element to the variable `authorContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#load-more-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 You should assign the `#load-more-btn` element to the variable `loadMoreBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
index 56155c13393..efef4c6e0ec 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
@@ -22,13 +22,13 @@ Make a `GET` request to this URL: `https://cdn.freecodecamp.org/curriculum/news-
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should not have a semi-colon after your `fetch` call.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
index 536ba4384ff..ebc6caf7220 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
@@ -27,37 +27,37 @@ Again, don't terminate the code with a semi-colon yet.
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain the `.then()` method to your `fetch()` syntax
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(/)
 ```
 
 You should add a `res` parameter to your `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
 ```
 
 Your `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
 ```
 
 You should log the `res` parameter to the console so you can see the `Response` object.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
index 6b0727914c3..beb628f0792 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
@@ -16,19 +16,19 @@ Remove `console.log(res)` and implicitly return `res.json()` instead.
 You should remove the `console.log(res)`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*console\.log\(res\)\)/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should implicitly return `res.json()` in your `.then()`.
 
 ```js
-assert.match(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\)/)
+assert.match(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\);/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\);/)
 ```
 
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
index 375c81efd69..c9facd153ba 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
@@ -17,7 +17,7 @@ Chain another `.then()` to the existing `.then()` method. This time, pass in `da
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Your first `.then()` should not have a semi-colon.
@@ -29,37 +29,37 @@ assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not not have semi-colon after it.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
index 518766c3da1..7adc7eadd2e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
@@ -18,67 +18,67 @@ Chain `.catch()` to the last `.then()`. Pass in a callback function with `err` a
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not have a semicolon.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\);/)
 ```
 
 You should chain the `.catch()` method to the second `.then()` you already have.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
 ```
 
 You should add an `err` parameter to your `.catch()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
 ```
 
 Your `.catch()` method should have an arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
 ```
 
 Your `.catch()` method should use `console.error()` to log `err` to the console with the text `` `There was an error: ${err}` ``. Don't forget to use backticks.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\)\s*;?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
index 63088badff9..f313b1bb0e7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
@@ -48,7 +48,7 @@ assert.match(code, /let\s+authorDataArr/)
 You should set your `authorDataArr` variable to an empty array (`[]`).
 
 ```js
-assert.match(code, /let\s+authorDataArr\s*=\s*\[\];?/)
+assert.match(code, /let\s+authorDataArr\s*=\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
index 1ec2024220a..86503cd4312 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
@@ -14,7 +14,7 @@ Inside your `displayAuthors` function, chain `.forEach()` to `authors`.
 You should chain `.forEach()` to `authors`.
 
 ```js
-assert.match(code, /authors\.forEach\(\)/)
+assert.match(code, /authors\.forEach\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
index bc524cd35cd..d548c950f21 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
@@ -34,7 +34,7 @@ assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*/)
 Your callback function should be empty.
 
 ```js
-assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\)\s*=>\s*\{\s*\}\s*\);?/)
+assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
index 982c18cae71..f1a89347765 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
@@ -16,7 +16,7 @@ First, remove your `console.log()` statement. Then, assign `data` to the `author
 You should remove the console log showing the `data`.
 
 ```js
-assert.notMatch(code, /console\.log\(data\);/)
+assert.notMatch(code, /console\.log\(\s*data\s*\);/)
 ```
 
 You should assign `data` to the `authorDataArr` variable
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
index 17fdac16f66..548781a3c5a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
@@ -22,19 +22,19 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should have a console log with the text `Author Data Array:`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1/)
 ```
 
 You should use comma to separate your `Author Data Array:` text and `authorDataArr`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,/)
 ```
 
 `authorDataArr` should be the second argument of your console log statement.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
index 03f3633a127..41be5ac1193 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
@@ -22,7 +22,7 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should remove the console log statement showing `authorDataArr`
 
 ```js
-assert.notMatch(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.notMatch(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 You should call your `displayAuthors` function.
@@ -34,19 +34,19 @@ assert.match(code, /displayAuthors\(/)
 You should call your `displayAuthors` function and pass in an argument of `authorDataArr.slice()`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first parameter of your `slice()` method should be `startingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second parameter of your `slice()` method should be `endingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\);?/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
index ac80b53e23d..4d80aa4ca96 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
@@ -34,13 +34,13 @@ assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*/)
 Your `fetchMoreAuthors` function should use arrow syntax.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `fetchMoreAuthors` function should be empty.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*\{\s*\}/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
index cae5fd5403b..39edaf8db09 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
@@ -24,21 +24,21 @@ You should call your `displayAuthors` function and pass in an argument of `autho
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first argument of your `slice()` method should be `startingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second argument of your `slice()` method should be `endingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\)/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
index 04b4068dea0..58a6e614207 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
@@ -24,13 +24,13 @@ assert.match(code, /loadMoreBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 Your event listener should take `fetchMoreAuthors` as the function to run.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1,\s*fetchMoreAuthors\);?/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1,\s*fetchMoreAuthors\s*\);?/)
 ```
 
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
index edbeccd7bdf..30d936fb6c2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
@@ -24,13 +24,13 @@ assert.match(code, /if\s*\(/)
 Your `if` statement should take in `authorDataArr.length <= endingIndex` as its condition.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*/)
 ```
 
 Your `if` statement should be empty.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
index 512b2870379..85f7bd5a2af 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
@@ -28,22 +28,21 @@ assert.match(code, /<p\s*class=("|')bio\1>/);
 You should check if the length of the `bio` text is greater than `50`.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50/)
+assert.match(code, /<p\s*class=("|')bio\1>\s*\$\{\s*bio\.length\s*>\s*50/)
 ```
 
 If the `bio` text is greater than `50` characters, you should extract the first 50 characters with `slice()` and replace the rest with `...`. Don't forget that indexes are zero-based.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:/);
 ```
 
 If the `bio` text is less than 50 characters, use the `bio` text directly.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:\s*bio\s*\}<\/p>/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:\s*bio\s*\}\s*<\/p>/);
 ```
 
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
index 3b6a552bcb2..9a35f4466a7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
@@ -16,7 +16,7 @@ Inside the `.catch()`, remove the `console.error()` and set the `innerHTML` of t
 You should remove your `console.error` and its text.
 
 ```js
-assert.notMatch(code, /console\.error\(`There\s+was\s+an\s+error:\s+\$\{err\}`\);/)
+assert.notMatch(code, /console\.error\(\s*`There\s+was\s+an\s+error:\s+\$\{err\}`\s*\);/)
 ```
 
 You should access the `innerHTML` of `authorContainer` and set it to a `p` element. Don't forget to surround the `p` element with a template literal.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
index 685944eec46..71ae8f93bad 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
@@ -96,19 +96,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
index 6d02ed5d3eb..45ef37e3ada 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
@@ -120,19 +120,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
index 4184dbaf6be..66ea5e87d8d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
@@ -111,19 +111,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
index 41b0401312b..7012c4add83 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
index e7d74d048c3..b29a75a07bb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
@@ -7,8 +7,9 @@ dashedName: step-5
 
 # --description--
 
-Now create a `fieldset` with an `id` set to `lunch`, and a corresponding `legend` and `div` element.
+Next, create a `fieldset` element with the `id` set to `lunch`.
 
+Within that element, create a `legend` element with the text `Lunch`, and an empty `div` with the `class` set to `input-container`.
 # --hints--
 
 You should create a second `fieldset` element in your `form`.
@@ -138,19 +139,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
index bd708b2d7ae..1ecca997d6f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
index 57f2117dc31..d684341a59c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
@@ -188,19 +188,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
index 3e38a1d5e71..8dbd81b922e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
index bdaf05d1633..826f07f2d47 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
@@ -190,19 +190,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
index 407b8ec810e..f9562ba377e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
@@ -196,19 +196,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
index c1a6c20b6cb..f7f815fdbd1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
index 203e3392f29..c40d375876d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
index d918bbedbef..78a0a29318b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
index 4f2974be920..61f56f544bf 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
@@ -29,13 +29,13 @@ You should create a variable called `calorieCounter`.
 assert.isDefined(calorieCounter);
 ```
 
-You should use `document.getElementById()` to get the `#calorie-counter` element.
+You should have `document.getElementById('calorie-counter')` in your code.
 
 ```js
 assert.match(code, /document\.getElementById\(\s*('|")calorie-counter\1\s*\)/g);
 ```
 
-You should store the `#calorie-counter` element in a variable called `calorieCounter`.
+You should assign `document.getElementById('calorie-counter')` to your `calorieCounter` variable.
 
 ```js
 assert.equal(calorieCounter, document.getElementById('calorie-counter'));
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
index dd62d26d930..40779098885 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
index e19de17d146..3bf0984e17d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
index e8bb891ff02..74cdbf9fe06 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
@@ -7,6 +7,13 @@ dashedName: step-17
 
 # --description--
 
+In programming, it is standard practice to prefix a variable with `is` or `has` to indicate that the variable is a boolean.
+
+```js
+let isRunning = true;
+let hasCompleted = false;
+```
+
 Declare an `isError` variable and set it to `false`, but use `let` so you can reassign it later.
 
 # --hints--
@@ -148,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
index e17c6e31690..6e808dad355 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
@@ -28,7 +28,7 @@ assert.isFunction(cleanInputString);
 Your `cleanInputString` function should take a `str` parameter.
 
 ```js
-assert.match(cleanInputString?.toString(), /\(str\)/);
+assert.match(cleanInputString?.toString(), /\(\s*str\s*\)/);
 ```
 
 `cleanInputString` should be an empty function.
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
index cad17a8ba86..36ef18d9953 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
index 9e877837601..e40022f6f9e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
index 8c953150693..57c9793383c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
index 32894bb579f..20e22d84040 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
@@ -7,24 +7,26 @@ dashedName: step-22
 
 # --description--
 
-Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
-
 You will need to check if the array `["+", "-", " "]` does not include the current character. You can use a combination of the <dfn>includes()</dfn> method and the <dfn>!</dfn> operator to do this.
 
 The `.includes()` method returns `true` if the array contains the character, and `false` if not. The logical NOT operator (`!`) will return the opposite of the value of the `.includes()` method.
 
-Here is an example:
+Here is an example checking if the current character is not in the vowels array. If it is not, that current character is pushed into the `consonantArray`:
 
 ```js
-const numbersArray = [1, 2, 3, 4, 5]
-const number = 6
+const inputString = "Hello World";
+const charArray = inputString.split('');
+const consonantArray = [];
 
-if (!numbersArray.includes(number)) {
-  console.log("The number is not in the array.")
+for (let i = 0; i < charArray.length; i++) {
+  if (!['a', 'e', 'i', 'o', 'u'].includes(charArray[i])) {
+    consonantArray.push(charArray[i]);
+  }
 }
-
 ```
 
+Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
+
 # --hints--
 
 Your `for` loop should have an `if` statement.
@@ -37,19 +39,19 @@ Your `for` loop should use `!["+", "-", " "].includes()`.
 
 ```js
 // the loop protection injects code so we have to look at the raw code directly
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(/);
 ```
 
-Your `for` loop should see if `strArray[i]` is found in `["+", "-", " "]`.
+Your `for` loop should see if `!["+", "-", " "].includes(strArray[i])`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?/);
 ```
 
 Your `for` loop should `push` `strArray[i]` to `cleanStrArray`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\[i\]\s*\)\s*;?\s*(\s*\})?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*;?\s*(\s*\})?/);
 ```
 
 # --seed--
@@ -171,19 +173,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
index 7065ce4c7c3..a42cd49b281 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
@@ -168,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
index 0f739df86e4..6328fdf60cf 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
index 8f2b27c020e..b78bfac2be4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
index 71c89b9896b..e18fa14eb59 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
index 16e6a5d4cb1..e899bca63ef 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
index bea6539b7bb..b0b57dc8ef7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
index e4fe3eb813e..09aede95cfa 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
index 5114d684092..d89ce27dc27 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
index 0db336a9431..7521432703b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
index 1e46c064aff..7fa68e56078 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
index 6036f5d974e..237fa2a1e1e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
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diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
index c0d66d97e5d..0cda54e0fc8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
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diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
index 1ee3a448933..3a0d5ac9363 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
@@ -6,8 +6,13 @@ dashedName: step-35
 ---
 
 # --description--
+Strings have a <dfn>.match()</dfn> method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
 
-Strings have a `.match()` method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
+```js
+const str = 'example string';
+const regex = /example/;
+const result = str.match(regex); // Returns ['example']
+```
 
 Return the result of calling the `.match()` method on `str` and passing your `regex` variable as the argument. You'll use this match result later on.
 
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
index 625ce0fd67f..2858a0ffa5d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
index 840f883919e..99b934fe65f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
index 69a27fd7447..f7c155c36cb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
index 8e3cecd5345..1963f975c24 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
@@ -26,13 +26,13 @@ Replace your concatenated string in the `querySelector` with a template literal
 You should use a template literal in your `querySelector` method.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`.*`\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`.*`\s*\)/);
 ```
 
 Your template literal should have the value `{targetId} .input-container`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`\$\{targetId\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`\$\{targetId\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
index 4db81e5fde2..988fe4e178d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
@@ -20,13 +20,13 @@ assert.notMatch(addEntry.toString(), /targetId\s*=/);
 You should replace the `targetId` reference in your template literal with `entryDropdown.value`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 You should add `#` at the beginning of your template literal.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
index 50ec2f7b043..d8dbb99d451 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
index 9e4687e6f52..606db01f0ec 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
@@ -24,13 +24,13 @@ assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.query
 You should access the `length` property of your `querySelectorAll()`.
 
 ```js
-assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 Your `entryNumber` variable should be the `length` of the `querySelectorAll`.
 
 ```js
-assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 # --seed--
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
index f8b83497516..7c9ca23f6e9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
index fe2e4fb5ee6..5f47317c8d8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
@@ -20,7 +20,7 @@ assert.match(code, /HTMLString\s*=\s*`\n\s*<label>.*<\/label>/);
 Your `label` element should have the text `Entry ${entryNumber} Name`.
 
 ```js
-assert.match(code, /HTMLString\s*=\s*`\n\s*<label>Entry\s\$\{entryNumber\}\sName<\/label>/);
+assert.match(code, /HTMLString\s*=\s*`\n\s*<label>\s*Entry\s\$\{entryNumber\}\sName\s*<\/label>/);
 ```
 
 # --seed--
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
index 5288e88ab3a..a961a06ebf8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
index e12f75926bb..f68562d225c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
index 68586422189..4c79df89b31 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
index 4f00823bc58..0f55af38b84 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
@@ -185,19 +185,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
index 0f1b8b290bd..1804f741632 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
@@ -172,19 +172,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
index 54c7112bf5a..3a1e151edb2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
index 492226ba58e..1b9635c38c1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
index 979781068ec..7d7552be113 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
@@ -146,19 +146,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
index c131d474fca..7744e33d8f2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
index a7de2c76216..01c9df67940 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
@@ -9,7 +9,25 @@ dashedName: step-50
 
 In the Role Playing Game project, you learned how to set a button's behavior by editing its `onclick` property. You can also edit an element's behavior by adding an event listener.
 
-Call the `.addEventListener()` method of the `addEntryButton`. It takes two arguments. The first is the event to listen to – you should pass the string `click`. The second is the callback function, or the function that runs when the event is triggered. Pass the `addEntry` function as the second argument. Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
+The following example uses the `addEventListener` method to add a click event to a button. When the button is clicked, the `printName` function is called.
+
+```html
+<button class="btn">Print name</button>
+```
+
+```js
+const button = document.querySelector('.btn');
+function printName() {
+  console.log("Jessica");
+}
+button.addEventListener('click', printName);
+```
+
+The `addEventListener` method takes two arguments. The first is the event to listen to. (Ex. `'click'`) The second is the callback function, or the function that runs when the event is triggered.
+
+Call the `.addEventListener()` method on the `addEntryButton`. Pass in the string `click` for the first argument and the `addEntry` function for the second argument.
+
+Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
 
 # --hints--
 
@@ -150,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
index bf934e8e742..207a172b7e1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
index 867cf005687..03657d02271 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
@@ -7,34 +7,26 @@ dashedName: step-56
 
 # --description--
 
-The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is an array-like which contains the elements that match the query selector.
+The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is a list of elements like an array. It contains the elements that match the query selector. You will need to loop through these elements in the list.
 
-You'll need to loop through these elements, so start by creating a `for` loop. Your iterator `i` should start at `0`, continue while it is less than the length of the list, and increment by `1` each iteration.
+In previous steps, you learned how to loop through an array using a `for` loop. You can also use a <dfn>for...of</dfn> loop to loop through an array and a `NodeList`.
+
+A `for...of` loop is used to iterate over elements in an iterable object like an array. The variable declared in the loop represents the current element being iterated over.
+
+```js
+for (const element of elementArray) {
+  console.log(element);
+}
+```
+
+Create a `for...of` loop that loops through the list. For the loop's variable name, use `const` to declare a variable called `item`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should have a `for` loop.
+You should have a `for...of` loop that loops through the `list` parameter. Use `item` for the loop's variable name.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(/g);
-```
-
-Your `for` loop should initialize a variable called `i` to `0`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;/g);
-```
-
-Your `for` loop should have a condition that checks if `i` is less than the length of `list`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;/g);
-```
-
-Your `for` loop should increment `i` by `1` each time it runs. Use the increment operator for this.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)/g);
+assert.match(code, /for\s*\(\s*const\s+item\s+of\s+list\s*\)\s*\{/);
 ```
 
 # --seed--
@@ -156,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
index 5acc27ac90d..8f7e0f25779 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
@@ -9,40 +9,20 @@ dashedName: step-57
 
 The `NodeList` values you will pass to `list` will consist of `input` elements. So you will want to look at the `value` attribute of each element.
 
-Assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
+Assign `item.value` to a `const` variable called `currVal`.
 
 # --hints--
 
-You should have a `currVal` variable.
+You should use `const` to declare a new variable called `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=/);
+assert.match(code, /const\s+currVal\s*=/);
 ```
 
-You should access the element in `list` at index `i` using bracket notation.
+You should assign `item.value` to `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]/);
-```
-
-You should access the `value` attribute of the element in `list` at index `i`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]\.value/);
-```
-
-You should assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*list\[i\]\.value/);
-```
-
-Your `currVal` assignment should be in your `for` loop.
-
-```js
-// another hack, because the loop protection injects stuff
-const getCaloriesString = code.split("function getCaloriesFromInputs")[1];
-assert.match(getCaloriesString, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*(const|let)\s+currVal\s*=\s*list\[i\]\.value/g);
+assert.match(code, /const\s+currVal\s*=\s*item\.value/);
 ```
 
 # --seed--
@@ -164,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,15 +224,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
+  --fcc-editable-region--
+  for (const item of list) {
 
   }
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
index d1bab0d5ec0..95914d93f51 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
@@ -9,26 +9,26 @@ dashedName: step-58
 
 Remember that you wrote a function earlier to clean the user's input? You'll need to use that function here.
 
-Update your `currVal` declaration to be the result of calling `cleanInputString` with `list[i].value`.
+Update your `currVal` declaration to be the result of calling `cleanInputString` with `item.value`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should call your `cleanInputString` function.
+You should call the `cleanInputString` function inside the `getCaloriesFromInputs` function.
 
 ```js
 assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(/);
 ```
 
-You should pass `list[i].value` as the argument for `cleanInputString`.
+You should pass `item.value` as the argument for `cleanInputString` function.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 You should assign the result of your `cleanInputString` call to your `currVal` variable.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(code, /const\s+currVal\s*=\s*cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -238,15 +231,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = list[i].value;
+  for (const item of list) {
+    --fcc-editable-region--
+    const currVal = item.value;
+    --fcc-editable-region--
   }
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
index a91cf6557be..84ac711904e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -239,8 +232,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
 
   }
 }
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
index aa07a612378..a09cdd6caf7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,8 +244,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
index c0d6292d851..635dac372cb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
@@ -23,13 +23,13 @@ You should use a template literal to pass the `Invalid Input:` message to the `a
 
 ```js
 // because it transforms template literals...
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: /);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: /);
 ```
 
-You should use template literal syntax to display the first value in the `invalidInputMatch` array after the `Invalid Input:` text.
+You should display the first element of the `invalidInputMatch` array after the `Invalid Input:` text by using a template literal.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\)/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\)/);
 ```
 
 # --seed--
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
index 99e8ebce620..ea4aefc9b32 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
@@ -7,6 +7,8 @@ dashedName: step-62
 
 # --description--
 
+In programming, `null` is meant to represent the absence of a value. In this case, if the user enters an invalid input, you want to alert them and then return `null` to indicate that the function has failed.
+
 Still within your `if` block, set `isError` to `true` and return `null`.
 
 # --hints--
@@ -14,13 +16,13 @@ Still within your `if` block, set `isError` to `true` and return `null`.
 After your `alert`, you should set `isError` to `true`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true/);
 ```
 
 After you modify `isError`, you should `return` the value `null`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
 ```
 
 # --seed--
@@ -142,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -233,8 +228,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
index 8214c6ca69f..706605a44aa 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
@@ -17,6 +17,7 @@ Here is an example:
 
 ```js
 Number('10'); // returns the number 10
+Number('abc'); // returns NaN
 ```
 
 # --hints--
@@ -164,19 +165,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +249,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
index 312d9a72eba..bfa5786277b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
@@ -17,12 +17,6 @@ You should `return` the `calories` value.
 assert.match(getCaloriesFromInputs.toString(), /return\s+calories/);
 ```
 
-Your new `return` statement should come after your `for` loop.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /calories\s*\+=\sNumber\(currVal\);\n\s*}\n\s*return\s+calories/)
-```
-
 # --seed--
 
 ## --seed-contents--
@@ -142,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -229,12 +216,11 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -244,9 +230,10 @@ function getCaloriesFromInputs(list) {
     }
     calories += Number(currVal);
   }
+  --fcc-editable-region--
 
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
index 8dccba3e7fc..e504f6c5024 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
@@ -26,7 +26,7 @@ assert.isFunction(calculateCalories);
 Your `calculateCalories` function should take an `e` argument.
 
 ```js
-assert.match(calculateCalories?.toString(), /\(e\)/);
+assert.match(calculateCalories?.toString(), /\(\s*e\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
index d5778e3a754..6cd25c0e4dd 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
@@ -16,7 +16,7 @@ Add a line to your `calculateCalories` function that calls the `preventDefault()
 Your `calculateCalories` function should call `e.preventDefault()`.
 
 ```js
-assert.match(calculateCalories.toString(), /e\.preventDefault\(\)/);
+assert.match(calculateCalories.toString(), /e\.preventDefault\(\s*\)/);
 ```
 
 Your `calculateCalories` function should reset the global error flag to `false`.
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -240,8 +233,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
index 476be7413a4..26f95c612b9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
@@ -22,13 +22,13 @@ assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#breakfast input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `odocument.querySelectorAll()` call to `breakfastNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -249,8 +242,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
index 188cac5c6e2..dedd4eddb02 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#lunch input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `lunchNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -248,8 +241,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
index 3df2948f483..737f5d53b8f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#dinner input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `dinnerNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `snacksNumberInputs` variable.
@@ -38,13 +38,13 @@ assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#snacks input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `snacksNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should declare a `exerciseNumberInputs` variable.
@@ -56,13 +56,13 @@ assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#exercise input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `exerciseNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -285,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
index 1680759d619..0492e392185 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +248,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
index f741ab7bff2..5adc5631940 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -254,8 +247,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
index 251a63cc517..e9094f26485 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -291,8 +284,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
index 78e92511f55..9141670fa8a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -262,8 +255,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
index 5f130d43965..bed8e829741 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -260,8 +253,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
index c7ba956c853..c79f304a93a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -270,8 +263,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
index 51b25be9cda..87a8f409300 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -265,8 +258,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
index 028c76b94b9..db7f10e807f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
@@ -162,19 +162,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +273,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
index ac569841456..056108f423f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
@@ -7,7 +7,7 @@ dashedName: step-78
 
 # --description--
 
-You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element.
+You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element on a new line at the end of the function.
 
 # --hints--
 
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -263,8 +256,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
index c0eb7bb2a0e..708e4b9c987 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
@@ -7,9 +7,16 @@ dashedName: step-79
 
 # --description--
 
-Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable, but lowercased.
+When you need to lower case a string, you can use the <dfn>toLowerCase()</dfn> method. This method returns the calling string value converted to lower case.
 
-Strings have a `.toLowerCase()` method that can help you with this. Do not give your `span` any text yet.
+```js
+const firstName = 'JESSICA';
+console.log(firstName.toLowerCase()); // Output: jessica
+```
+
+Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable. Your `surplusOrDeficit` variable should be converted to lower case using the `toLowerCase()` method.
+
+Do not give your `span` any text yet.
 
 # --hints--
 
@@ -160,19 +167,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -279,8 +279,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
index 7c172485ac7..4922e7c5a7f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -258,8 +251,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
index 5609c0bc614..d74b67a8d50 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
@@ -9,7 +9,14 @@ dashedName: step-81
 
 When the user has a calorie deficit, the `remainingCalories` value will be negative. You don't want to display a negative number in the result string.
 
-`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number. In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
+`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number.
+
+```js
+const num = -5;
+Math.abs(num); // 5
+```
+
+In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
 
 # --hints--
 
@@ -24,7 +31,7 @@ Your `span` should have the text `${Math.abs(remainingCalories)} Calorie ${surpl
 
 ```js
 const htmlString = code.split(/output\s*\.\s*innerHTML\s*=\s*/)[1].split(/`/)[1];
-assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(remainingCalories\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
+assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(\s*remainingCalories\s*\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
 ```
 
 # --seed--
@@ -146,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -267,8 +267,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
index 74c5a943c03..b18255bbb1a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
index 4d231096f74..bddf5fd9a4e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -283,8 +276,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
index 550e831fe65..82f6ce3a219 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
@@ -158,19 +158,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -282,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
index cfdf4f3d58d..3bc4a7d7ae3 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
@@ -9,6 +9,11 @@ dashedName: step-85
 
 Finally, you need to make the `#output` element visible so the user can see your text. Your `output` variable is an Element, which has a `classList` property. This property has a `.remove()` method, which accepts a string representing the class to remove from the element.
 
+```js
+const paragraphElement = document.getElementById('paragraph');
+paragraphElement.classList.remove('hide');
+```
+
 Use the `.remove()` method of the `output` variable's `classList` property to remove the `hide` class. Don't forget to place the word `hide` inside quotes.
 
 # --hints--
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -277,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
index 725b473fff8..ad8ddb7049e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
index 270ba8730fe..8377a3cc576 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
index f392d6fe294..8f091868101 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
index 88dc65d439c..d8b231f2acc 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
@@ -9,6 +9,22 @@ dashedName: step-89
 
 Remember that `document.querySelectorAll` returns a `NodeList`, which is array-like but is not an array. However, the `Array` object has a `.from()` method that accepts an array-like and returns an array. This is helpful when you want access to more robust array methods, which you will learn about in a future project.
 
+The following example takes a `NodeList` of `li` elements and converts it to an array of `li` elements:
+
+```html
+<ul>
+  <li>List 1</li>
+  <li>List 2</li>
+  <li>List 3</li>
+</ul>
+```
+
+```js
+const listItemsArray = Array.from(document.querySelectorAll('li'));
+
+console.log(listItemsArray); //Output: (3) [li, li, li]
+```
+
 Wrap your `inputContainers` query selector in `Array.from()`. Do this on the same line as your declaration.
 
 # --hints--
@@ -144,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -269,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
index dd9592a906f..8223c0161d9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
@@ -7,33 +7,25 @@ dashedName: step-90
 
 # --description--
 
-It is time for another loop. Use a `for` loop to iterate through the `inputContainers` array.
+It is time for another loop. Create a `for...of` loop with a variable called `container` to iterate through the `inputContainers` array.
 
-Inside the loop, set the `innerHTML` property of the element at the current index to an empty string. This will clear all of the contents of that input container.
+Inside the loop, set the `innerHTML` property of the `container` to an empty string. This will clear all of the contents of that input container.
 
 # --hints--
 
-Your `clearForm` function should have a `for` loop.
+Your `for...of` loop should iterate through the `inputContainers` array. The loop's variable name should be `container`.
 
 ```js
-// loop protect injects stuff, so let's look at the raw code again
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(/);
+assert.match(clearForm, /for\s*\(\s*const\s+container\s+of\s+inputContainers\s*\)/);
 ```
 
-Your `for` loop should iterate through the `inputContainers` array. Remember to use `i` as your iterator.
+Your `for...of` loop should set the `innerHTML` property of `container` to an empty string.
 
 ```js
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*inputContainers\.length\s*;\s*i\s*\+\+\s*\)/);
-```
-
-Your `for` loop should set the `innerHTML` property of `inputContainers[i]` to an empty string.
-
-```js
-const clearForm = code.split("function clearForm()")[1];
-const forLoop = clearForm.split("for")[1];
-assert.match(forLoop, /inputContainers\[\s*i\s*\]\s*\.innerHTML\s*=\s*(`|'|")\1\s*/);
+const forOfLoop = clearForm.split("for")[1];
+assert.match(forOfLoop, /container\s*\.\s*innerHTML\s*=\s*(`|'|")\1\s*/);
 ```
 
 # --seed--
@@ -155,19 +147,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +265,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
index 98fed947284..08d26733c07 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
index ca6e259d452..abcdcd5d08a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
index be4aabbc2bc..0a74731bd49 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
index bc43b794a79..c163fe6a8da 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -292,8 +285,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
@@ -425,19 +418,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -550,8 +536,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -567,8 +553,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
index 8a9e55f1ab1..7d75ee4e0f5 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
@@ -16,13 +16,13 @@ In your `createLabel` function, declare a `label` variable and assign it a new `
 You should declare a `label` variable in your `createLabel` function.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*(?:const|let|var)\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*(?:const|let|var)\s+label/);
 ```
 
 Your `label` variable should be declared with `const`.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*const\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*const\s+label/);
 ```
 
 You should use the `.createElement()` method of the `document` object.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
index 9e53492fd61..85e54c54e89 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
@@ -22,7 +22,7 @@ assert.match(code, /letters\.forEach\(/);
 You should pass your `createLabel` function reference to the `.forEach()` method.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*createLabel\s*\)/);
+assert.match(code, /letters\.forEach\(\s*(?:\(\s*([\S]*)\s*\)|\s*([\S]*))\s*=>\s*createLabel\(\s*\1\2\s*\)\s*\)|letters\.forEach\(\s*createLabel\s*\)/);
 ```
 
 You should not pass a `createLabel` function call.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
index 15d2677d0b2..7243c54a1eb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-In your callback, call `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
+In your callback, you will need to make two function calls. Start by calling `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
 
 Then call the `.forEach()` method on your `letters` array. Pass an empty callback function which takes a `letter` parameter.
 
@@ -46,7 +46,13 @@ assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{/)
 Your callback function should be empty.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{\s*\}/)
+assert.match(code, /letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}/)
+```
+
+Your `letters.forEach()` callback function should be nested inside the `range(1, 99).forEach(number => {}` callback function.
+
+```js
+assert.match(code, /range\s*\(\s*1\s*,\s*99\s*\)\s*.forEach\s*\(\s*(\(\s*number\s*\)|number)\s*=>\s*\{\s*[^}]*letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}\s*\)\s*\}\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
index 5556b62f0d8..90ba4117b1c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
@@ -9,8 +9,6 @@ dashedName: step-17
 
 Now in your nested `.forEach()` call, declare an `input` variable. Use the `.createElement()` method of the `document` object to create an `input` element. Set the `type` attribute to `text` and the `id` attribute to `letter + number`.
 
-For accessibility, set the `aria-label` attribute to the same value as the `id` attribute.
-
 # --hints--
 
 You should declare an `input` variable.
@@ -67,18 +65,6 @@ You should set the `id` attribute of your `input` element to `letter + number`.
 assert.match(code, /input\.id\s*=\s*letter\s\+\snumber/)
 ```
 
-You should access the `ariaLabel` property of your `input` element.
-
-```js
-assert.match(code, /input\.ariaLabel/);
-```
-
-You should set the `aria-label` attribute of your `input` element to `letter + number`.
-
-```js
-assert.match(code, /input\.ariaLabel\s*=\s*letter\s\+\snumber/)
-```
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
index 75c2e62e5e5..42633bfd960 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
@@ -1,8 +1,8 @@
 ---
 id: 643498328cb52026123e2b91
-title: Hatua ya 18
+title: Step 19
 challengeType: 0
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
index 4f3cbefe6d0..8d1ddcd5fb5 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
@@ -1,8 +1,8 @@
 ---
 id: 643498755d54c6279ba09078
-title: Hatua ya 19
+title: Step 20
 challengeType: 0
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
index e25e846f277..9d06932a530 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
@@ -1,8 +1,8 @@
 ---
 id: 6437124c4c03dd4c8fb35d56
-title: Hatua ya 20
+title: Step 21
 challengeType: 0
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
index 2608a0e4511..58e532930ff 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
@@ -1,8 +1,8 @@
 ---
 id: 6437133052eaf04d7300e622
-title: Hatua ya 21
+title: Step 22
 challengeType: 0
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
index 6d9c8d2fe92..b23e311ab0e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
@@ -1,8 +1,8 @@
 ---
 id: 643715013330824ecaa70442
-title: Hatua ya 22
+title: Step 23
 challengeType: 0
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
index 06b9ff94d9f..deb4a393803 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d1e5af8c0148fbef96d
-title: Hatua ya 23
+title: Step 24
 challengeType: 0
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
index 133bb4cf4fb..8c9bacddb49 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d80bc174a158c973080
-title: Hatua ya 24
+title: Step 25
 challengeType: 0
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
@@ -50,19 +50,19 @@ assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*n
 The first element of the array passed to `average()` should be the element at the `middle` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]/);
 ```
 
 The first element of the array passed to `average()` should be the element at the `middle + 1` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\)/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)/);
 ```
 
 If the ternary is false, you should return the value of `sorted` at the `middle` index. Use `Math.ceil()` to round the `middle` value up.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\[\s*Math\.ceil\(\s*middle\s*\)\s*\];?/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\s*\[\s*Math\.ceil\(\s*middle\s*\)\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
index b4828f4c93f..efe3f42753d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
@@ -1,8 +1,8 @@
 ---
 id: 64496df724dd3716a71fe971
-title: Hatua ya 25
+title: Step 26
 challengeType: 0
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
index 69c4d2b8d85..7b8b7d9ffe6 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
@@ -1,8 +1,8 @@
 ---
 id: 64496e9c6d7a2e189948e441
-title: Hatua ya 26
+title: Step 27
 challengeType: 0
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
index a964ecc6fad..52e6a20efa0 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
@@ -1,8 +1,8 @@
 ---
 id: 6449749d20436c1f1dfadcf2
-title: Hatua ya 27
+title: Step 28
 challengeType: 0
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
index 4d890509081..63c290f2fb7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
@@ -1,8 +1,8 @@
 ---
 id: 6449755666005520330cec5b
-title: Hatua ya 28
+title: Step 29
 challengeType: 0
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
index 0660a5c3a5b..1dc1617bd6e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
@@ -1,8 +1,8 @@
 ---
 id: 64497da4062602213ecf32e7
-title: Hatua ya 29
+title: Step 30
 challengeType: 0
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
index e9eed9d3cbd..e018fb06bbf 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
@@ -1,8 +1,8 @@
 ---
 id: 64497de936a2f322327e5c58
-title: Hatua ya 30
+title: Step 31
 challengeType: 0
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
index 5e51f4ccc25..9a418bcf2fb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e0e5e5a2c2329785af4
-title: Hatua ya 31
+title: Step 32
 challengeType: 0
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
@@ -16,7 +16,7 @@ Use the `&&` operator to add a second condition to your `if` statement that also
 You should use the `&&` operator to add a second condition to your `if` statement that also checks if the first character of `value` is `=`. You may use `[0]`, `.startsWith()`, or `.charAt(0)`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
index 65e3cc11e31..cea5d468a27 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e764135bd24b7960dd3
-title: Hatua ya 32
+title: Step 33
 challengeType: 0
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
index 1f1ff32efcb..117a075e0f3 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
@@ -1,8 +1,8 @@
 ---
 id: 6449842c6f6c84261075e4c9
-title: Hatua ya 33
+title: Step 34
 challengeType: 0
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
index 541e8bf3651..f331b2e13dc 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
@@ -1,8 +1,8 @@
 ---
 id: 64498473a17adc26ef0ecc2d
-title: Hatua ya 34
+title: Step 35
 challengeType: 0
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
index ae64c674169..869aa786b1b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
@@ -1,8 +1,8 @@
 ---
 id: 6449849b78f43527be1e8a98
-title: Hatua ya 35
+title: Step 36
 challengeType: 0
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
index 76fa61a460b..379d979b83e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
@@ -1,8 +1,8 @@
 ---
 id: 64498542cab69128ab24e4de
-title: Hatua ya 36
+title: Step 37
 challengeType: 0
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
index 10f2278017c..db2048f5154 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
@@ -1,8 +1,8 @@
 ---
 id: 6449860d84c9e22cbd7b497c
-title: Hatua ya 37
+title: Step 38
 challengeType: 0
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
index 211fd5a3e6d..1d217df30cf 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
@@ -1,8 +1,8 @@
 ---
 id: 6449863f592af72d9be0959e
-title: Hatua ya 38
+title: Step 39
 challengeType: 0
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
index e534860d121..97250208fe7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
@@ -1,8 +1,8 @@
 ---
 id: 6449874d5191562eb3313b3f
-title: Hatua ya 39
+title: Step 40
 challengeType: 0
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
index 51810d29591..f48039d757e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
@@ -1,8 +1,8 @@
 ---
 id: 6449876e7aae0d2f8257a497
-title: Hatua ya 40
+title: Step 41
 challengeType: 0
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
index 2ba550d8987..6e3f9b611c6 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
@@ -1,8 +1,8 @@
 ---
 id: 64498b085028fc30a58bb6a7
-title: Hatua ya 41
+title: Step 42
 challengeType: 0
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
index 74c345c03d7..d0a3366315c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0889c6ff4baa46ac1c50
-title: Hatua ya 42
+title: Step 43
 challengeType: 0
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
index 59f3df1b93f..716a7d4ca9a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
@@ -1,8 +1,8 @@
 ---
 id: 646d09a07241aaab1e777080
-title: Hatua ya 43
+title: Step 44
 challengeType: 0
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
index 42c7b559977..685d62ba96b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0a022da7bcabf3e3aca3
-title: Hatua ya 44
+title: Step 45
 challengeType: 0
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
index 993f0ec8f81..28ec9801c66 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0d20108440acc95a6b32
-title: Hatua ya 45
+title: Step 46
 challengeType: 0
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
index 024f67fb6b3..e8720b88a53 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0db5175974ad8633b71c
-title: Hatua ya 46
+title: Step 47
 challengeType: 0
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
index 6a3d7e54028..d5c1b76abff 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0e4636e14eae2bb3b992
-title: Hatua ya 47
+title: Step 48
 challengeType: 0
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
index 400d0ad7694..bce3cb02167 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1980018efaaec2b1c28b
-title: Hatua ya 48
+title: Step 49
 challengeType: 0
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
index c9227481659..7f8eb0a90b8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
@@ -1,8 +1,8 @@
 ---
 id: 646d19fc4705e4af65c3e688
-title: Hatua ya 49
+title: Step 50
 challengeType: 0
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
index 90e3f69073c..d076c93f8b1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1b96dd7ea4b0061458bc
-title: Hatua ya 50
+title: Step 51
 challengeType: 0
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
index 04ff910d342..fb0d686e40d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
@@ -1,13 +1,13 @@
 ---
 id: 646d1cadf0d96ab0b7e12da4
-title: Hatua ya 51
+title: Step 52
 challengeType: 0
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
 
-Because `elemValue` returns a function, your `addChars` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
+Because `elemValue` returns a function, your `addCharacters` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
 
 <!-- TODO: Explain further? -->
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
index dc481b0a224..c1ef0ae4591 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1d67f9261fb15a795588
-title: Hatua ya 52
+title: Step 53
 challengeType: 0
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
index 8c0fd61b10d..81a967ea80d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1e531042dfb24da1f032
-title: Hatua ya 53
+title: Step 54
 challengeType: 0
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
@@ -16,13 +16,13 @@ The callback function takes a few parameters. The first is the matched string. P
 You should pass an arrow function as the second argument to your `.replace()` method.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 Your arrow function should take a `match` parameter.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
index 7339f322131..4e0bdcafe1b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3141790b3cb337dd611a
-title: Hatua ya 54
+title: Step 55
 challengeType: 0
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
index 2dc218fd7fc..a976d2e313d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
@@ -1,8 +1,8 @@
 ---
 id: 646d382c4d70ceb3dba1e830
-title: Hatua ya 55
+title: Step 56
 challengeType: 0
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
index 43dda1c0a3c..7a1435a9e93 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
@@ -1,8 +1,8 @@
 ---
 id: 646d386a685620b49db4be76
-title: Hatua ya 56
+title: Step 57
 challengeType: 0
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
index cec9afc96eb..c6980b6b44a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38c326f3c8b54023de38
-title: Hatua ya 57
+title: Step 58
 challengeType: 0
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
index 5f52f503689..0af42bfb322 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38f906b94cb5fe6ce7de
-title: Hatua ya 58
+title: Step 59
 challengeType: 0
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
index eb2e24e3cf9..daa12199dcb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3952f6af37b6a1c241c2
-title: Hatua ya 59
+title: Step 60
 challengeType: 0
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
index b41312a9e49..e9f8b5ce15d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
@@ -1,8 +1,8 @@
 ---
 id: 646d39c156fe94b7482c3ab6
-title: Hatua ya 60
+title: Step 61
 challengeType: 0
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
index e910d8912f3..3fa9bd07097 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3b27cd3c56b875256301
-title: Hatua ya 61
+title: Step 62
 challengeType: 0
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
index 7444263b48c..4e1043eecb1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3bc75fe0c9b972da3323
-title: Hatua ya 62
+title: Step 63
 challengeType: 0
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
index 44213103938..ec294284249 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3c146e10b0ba222bb2a7
-title: Hatua ya 63
+title: Step 64
 challengeType: 0
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
index 6fffc00f2ff..747899bb3e3 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d037872fbbae0a8ec0e
-title: Hatua ya 64
+title: Step 65
 challengeType: 0
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
index ddf91af96ae..022a6c568cb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d65be79c8bb9c7df9ff
-title: Hatua ya 65
+title: Step 66
 challengeType: 0
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
index 98a47178ab0..9615d7f929a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d80c3b4aebc4103618e
-title: Hatua ya 66
+title: Step 67
 challengeType: 0
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
index e907ab78926..196385d39b2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3da8501e15bcd355ba1d
-title: Hatua ya 67
+title: Step 68
 challengeType: 0
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
index dd5a318b137..3cb7c61d53f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e135ab3abbdbfe5c899
-title: Hatua ya 68
+title: Step 69
 challengeType: 0
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
index e265f792584..8c653ee86f4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e64b15f92be6e61704e
-title: Hatua ya 69
+title: Step 70
 challengeType: 0
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str
 Your callback function should use bracket notation to access the property of the `infixToFunction` object that matches the value of the `operator` parameter.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
index 26f1a485041..cd6d06d7e99 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3ee7b17ae3bf48610033
-title: Hatua ya 70
+title: Step 71
 challengeType: 0
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
@@ -14,19 +14,19 @@ dashedName: step-70
 Your callback function should return the result of calling `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(/);
 ```
 
 You should pass `arg1` as the first argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1/);
 ```
 
 You should pass `arg2` as the second argument to your `infixToFunction[operator]` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
index 44f9b85cd80..2145e640b31 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f1fd12f76c02c823bb8
-title: Hatua ya 71
+title: Step 72
 challengeType: 0
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
@@ -16,13 +16,13 @@ Wrap each of your `infixToFunction[operator]` arguments in a `parseFloat()` call
 You should wrap `arg1` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
 ```
 
 You should wrap `arg2` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
index e1784e11f94..f9fcf26f42e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f718b5f8dc102cd528e
-title: Hatua ya 72
+title: Step 73
 challengeType: 0
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
index 01158779ccd..d7bdc37d7b2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
@@ -1,8 +1,8 @@
 ---
 id: 646d404259f512c1a9e86ac1
-title: Hatua ya 73
+title: Step 74
 challengeType: 0
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
index 80bc0e4d9cf..167d450138d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40c543943ec250039682
-title: Hatua ya 74
+title: Step 75
 challengeType: 0
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
index 6280dec3b0f..660a596da8e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40fe4b7b50c30c2b4cd8
-title: Hatua ya 75
+title: Step 76
 challengeType: 0
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
index 9fe3afe17fe..0bc08a4012e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
@@ -1,8 +1,8 @@
 ---
 id: 646d41e23b583fc3b8cc4579
-title: Hatua ya 76
+title: Step 77
 challengeType: 0
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
index 5a43a3a7492..16562b4bb2f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
@@ -1,8 +1,8 @@
 ---
 id: 646d423fade4a9c4636acd13
-title: Hatua ya 77
+title: Step 78
 challengeType: 0
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
index bcd46aa2dfb..efc5d0ffc18 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
@@ -1,8 +1,8 @@
 ---
 id: 646d42f58deb2fc52adc6611
-title: Hatua ya 78
+title: Step 79
 challengeType: 0
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
index 3a0f32cb807..02383be897f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d43587d926bc5b6cb2e50
-title: Hatua ya 79
+title: Step 80
 challengeType: 0
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
index 28b4877c76b..1ea064565a1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d448479c8fdc8dcec868c
-title: Hatua ya 80
+title: Step 81
 challengeType: 0
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
index ce2433ba754..b6fe908bbf8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d44da986f2bc9b72f5fe2
-title: Hatua ya 81
+title: Step 82
 challengeType: 0
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
index 02bb490b069..3d6821dadd1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
@@ -1,8 +1,8 @@
 ---
 id: 646d451c2e44afca71b67818
-title: Hatua ya 82
+title: Step 83
 challengeType: 0
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
index 01cc715c4ad..18d0465bd29 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4554721d43cb19a68bc4
-title: Hatua ya 83
+title: Step 84
 challengeType: 0
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
@@ -28,13 +28,13 @@ assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*cons
 Your `apply` function should access the property of the `spreadsheetFunctions` object that matches the `fn` value.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn/);
 ```
 
 Your `apply` function should call the `.toLowerCase()` method on `fn` in the property access.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]/);
 ```
 
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
index bdafa27e09a..b14d113cdfd 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45b739da5ecbf830c108
-title: Hatua ya 84
+title: Step 85
 challengeType: 0
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Your `apply` function is returning the spreadsheet function, but not actually ap
 Your `apply` function should call the `spreadsheetFunctions[fn.toLowerCase()]` function.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(/);
 ```
 
 You should pass a `toNumberList()` call to your `spreadsheetFunctions[fn.toLowerCase()]` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(/);
 ```
 
 You should pass `args` to your `toNumberList()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
index 6a47ae36cc0..95734fb4ffe 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45ee725632cca2555146
-title: Hatua ya 85
+title: Step 86
 challengeType: 0
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Now your `applyFunction` needs to return a result. Return the result of calling
 Your `applyFunction` function should return the result of calling the `.replace()` method on `str2`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(/);
 ```
 
 You should pass `functionCall` as the first argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall/);
 ```
 
 You should pass an empty arrow function as the second argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
 ```
 
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
index 55ff6924ce1..8eb18bbd464 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4626420eeecd51f241c2
-title: Hatua ya 86
+title: Step 87
 challengeType: 0
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Remember to make `fn` lower case.
 Your callback function should have `match` as the first parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
 ```
 
 Your callback function should have `fn` as the second parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
 ```
 
 Your callback function should have `args` as the third parameter.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
 ```
 
 Your callback function should use an implicit return.
 
 ```js
-assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
+assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
 ```
 
 Your callback function should return the result of calling the `.hasOwnProperty()` method on the `spreadsheetFunctions` object.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
 ```
 
 You should pass `fn` to the .`hasOwnProperty()` method.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn/);
 ```
 
 You should call the `.toLowerCase()` method on `fn`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
index dace2386087..1fd62328533 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d467c6994f4ce0dc416a4
-title: Hatua ya 87
+title: Step 88
 challengeType: 0
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
@@ -14,31 +14,31 @@ Use the ternary operator to turn your `.hasOwnProperty()` call into the conditio
 Your callback function should use ternary syntax.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
 ```
 
 If the ternary condition is true, your callback function should return the result of calling `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\s*\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\s*\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
 ```
 
 You should pass `fn` as the first argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
 ```
 
 You should pass `args` as the second argument to your `apply()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
 ```
 
 If the ternary is false, you should return `match`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
index c5d5312aa43..222c5c8a20d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
@@ -1,8 +1,8 @@
 ---
 id: 646d46c03e7d02cecb30f021
-title: Hatua ya 88
+title: Step 89
 challengeType: 0
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
@@ -14,25 +14,25 @@ Now you can start applying your function parser to your `evalFormula` logic. Dec
 You should declare a `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
 ```
 
 You should use `const` to declare your `functionExpanded` variable.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*const\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*const\s+functionExpanded\s*=\s*/);
 ```
 
 You should assign the `functionExpanded` variable the result of calling your `applyFunction` function.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
 ```
 
 You should pass `cellExpanded` to your `applyFunction` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
index 2d3d0b28b51..48b1cab80ed 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4717a689e1cfa232e357
-title: Hatua ya 89
+title: Step 90
 challengeType: 0
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Use a ternary to check if `functionExpanded` is equal to the original string `x`
 Your `evalFormula` function should use the `return` keyword.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
 ```
 
 Your `return` statement should check if `functionExpanded` is equal to `x`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
 ```
 
 Your `return` statement should use a ternary operator.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
 ```
 
 If the ternary condition is true, your `evalFormula()` should return `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
 ```
 
 If the ternary condition is false, your `evalFormula()` should return the result of calling `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
 ```
 
 You should pass `functionExpanded` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
 ```
 
 You should pass `cells` as the second argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
index 63a1cc7d3a0..c1249111d86 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4769ba65f1d05ef6b634
-title: Hatua ya 90
+title: Step 91
 challengeType: 0
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
@@ -16,19 +16,19 @@ Inside your `if` statement, set the `value` of the `element` to be the result of
 You should update the `value` property of `element` in your `if` block.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
 ```
 
 You should assign the `value` property the result of calling your `evalFormula()` function.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
 ```
 
 You should not pass any arguments to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
index faa829f15c3..9ef5920b36a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
@@ -1,8 +1,8 @@
 ---
 id: 646d47c8f58107d10f1e5106
-title: Hatua ya 91
+title: Step 92
 challengeType: 0
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
@@ -14,19 +14,19 @@ The first argument for your `evalFormula` call needs to be the contents of the c
 You should pass `value` as the first argument to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
 ```
 
 You should call the `.slice()` method on the `value` argument.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(/);
 ```
 
 You should pass the number `1` as the argument to your `.slice()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(\s*1\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
index fd36bbb6202..c2b4d2b8c71 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4813c17b37d1e261a566
-title: Hatua ya 92
+title: Step 93
 challengeType: 0
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
@@ -14,19 +14,19 @@ You can quickly get all cells from your page by getting the `#container` element
 For the second parameter of your `evalFormula()` call, you should call the `.getElementById()` method of the `document` object.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
 ```
 
 You should pass `container` as the argument to your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
 ```
 
 You should access the `children` property of the result of your `.getElementById()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
index c47453dadbc..ac6184b9d56 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
@@ -1,8 +1,8 @@
 ---
 id: 646d486aec20f7d2a581cc36
-title: Hatua ya 93
+title: Step 94
 challengeType: 0
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
@@ -14,7 +14,7 @@ Unfortunately, that `children` property is returning a collection of elements, w
 You should wrap your `document.getElementById('container').children` in `Array.from()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
index 14b2e361b4b..98ffeb00088 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
@@ -1,8 +1,8 @@
 ---
 id: 646d48b936802fd34c3f05af
-title: Hatua ya 94
+title: Step 95
 challengeType: 0
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
index a60eb659451..a4c682f9df4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d498c8ebc31d3f753b22e
-title: Hatua ya 95
+title: Step 96
 challengeType: 0
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
index 2e8bc1fad07..43c6ebe6441 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
@@ -1,8 +1,8 @@
 ---
 id: 646d49bfff9079d4b38df115
-title: Hatua ya 96
+title: Step 97
 challengeType: 0
-dashedName: step-96
+dashedName: step-97
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
index 52796db9aca..0e9787dff11 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a07a8fb14d55cd70e09
-title: Hatua ya 97
+title: Step 98
 challengeType: 0
-dashedName: step-97
+dashedName: step-98
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
index b8a679e1127..983d30989b0 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a5b32a1cad6165df286
-title: Hatua ya 99
+title: Step 100
 challengeType: 0
-dashedName: step-99
+dashedName: step-100
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
index d669f48f316..34ae3e371aa 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a8dbc04c6d6bb0001f8
-title: Hatua ya 100
+title: Step 101
 challengeType: 0
-dashedName: step-100
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
index 56e18ec0bf6..b221e737fdb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4ab9b3b4c5d74fdd2154
-title: Hatua ya 101
+title: Step 102
 challengeType: 0
-dashedName: step-101
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
index e7b8a60d185..89e89d3ac90 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4b3d80ea98d824c8a4f9
-title: Hatua ya 102
+title: Step 103
 challengeType: 0
-dashedName: step-102
+dashedName: step-103
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
index 039a137b2e6..eb5424ffa9d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
@@ -1,8 +1,8 @@
 ---
 id: 6491d38f5b09a021c4b5d5fe
-title: Hatua ya 98
+title: Step 99
 challengeType: 0
-dashedName: step-98
+dashedName: step-99
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
new file mode 100644
index 00000000000..3a606f8e1cf
--- /dev/null
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
@@ -0,0 +1,104 @@
+---
+id: 65ae458e23954c3469e0c209
+title: Step 18
+challengeType: 0
+dashedName: step-18
+---
+
+
+# --description--
+
+In earlier projects you learned about the `setAttribute` method. Another way to update an attribute in JavaScript is to use the following syntax:
+
+```js
+el.attribute = value;
+```
+
+The property names for hyphenated HTML attribute values, such as `aria-label`, follow camel case, becoming `ariaLabel`.
+
+```js
+el.ariaLabel = "Aria Label Value";
+```
+
+Set the `aria-label` attribute for the `input` element to the same value as the `id` attribute.
+
+
+# --hints--
+
+You should have an `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=/);
+```
+
+
+You should assign `letter + number` to `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=\s*letter\s*\+\s*number/);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="./styles.css" />
+    <title>Functional Programming Spreadsheet</title>
+  </head>
+  <body>
+    <div id="container">
+      <div></div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+#container {
+  display: grid;
+  grid-template-columns: 50px repeat(10, 200px);
+  grid-template-rows: repeat(11, 30px);
+}
+
+.label {
+  background-color: lightgray;
+  text-align: center;
+  vertical-align: middle;
+  line-height: 30px;
+}
+```
+
+```js
+const range = (start, end) => Array(end - start + 1).fill(start).map((element, index) => element + index);
+const charRange = (start, end) => range(start.charCodeAt(0), end.charCodeAt(0)).map(code => String.fromCharCode(code));
+
+window.onload = () => {
+  const container = document.getElementById("container");
+  const createLabel = (name) => {
+    const label = document.createElement("div");
+    label.className = "label";
+    label.textContent = name;
+    container.appendChild(label);
+  }
+  const letters = charRange("A", "J");
+  letters.forEach(createLabel);
+  range(1, 99).forEach(number => {
+     createLabel(number);
+--fcc-editable-region--
+    letters.forEach(letter => {
+     const input = document.createElement("input");
+     input.type = "text";
+     input.id = letter + number;
+
+    })   
+--fcc-editable-region--
+  })
+}
+```
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
index 3b18287492e..aca5e367a90 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
@@ -16,7 +16,7 @@ Now you should be able to roll the dice a few times and see the values update.
 You should call your `updateStats` function inside the `else` clause.
 
 ```js
-assert.match(code, /updateStats\(\)/)
+assert.match(code, /updateStats\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
index 66b1547899c..56a69dafede 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
@@ -28,7 +28,7 @@ assert.match(code, /const\s+updateRadioOption\s*=\s*\(.*\)\s*=>\s*{\s*[\s\S]*};?
 Your `updateRadioOption` function should take `optionNode` and `score` as parameters.
 
 ```js
-assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\)\s*=>\s*{\s*[\s\S]*};?/)
+assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\s*\)\s*=>\s*{\s*[\s\S]*};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
index 58d55b32d27..1a9e0b00ce0 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
@@ -14,7 +14,7 @@ To enable the radio buttons, you should set the `disabled` property on `scoreInp
 You should assign `false` to `scoreInputs[optionNode].disabled`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.disabled\s*=\s*false/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.disabled\s*=\s*false/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
index fb9cd97550e..8970616df7d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
@@ -14,7 +14,7 @@ Next, you will need to update the radio button's `value` to the current `score`.
 You should assign the `score` variable to `scoreInputs[optionNode].value`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.value\s*=\s*score/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.value\s*=\s*score/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
index 700767e046b..d523ebec132 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
@@ -14,7 +14,7 @@ To display the current score, update the text content for the `span` element nex
 You should set the `textContent` property for `scoreSpans[optionNode]` to the following template literal: `, score = ${score}`.
 
 ```js
-assert.match(code, /scoreSpans\[\s*optionNode\s*\]\.textContent\s*=\s*`, score = \${score}`;?/);
+assert.match(code, /scoreSpans\s*\[\s*optionNode\s*\]\s*\.textContent\s*=\s*`, score = \${score}`;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
index 6fc619bab90..521f266e76d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
@@ -22,7 +22,7 @@ assert.match(code, /updateRadioOption\(.*\);?/);
 You should have the arguments of `0` and `10` for the `updateRadioOption` function.
 
 ```js
-assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
index 2159726e9c4..b05d35be8d9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
@@ -14,7 +14,7 @@ Now that you have verified the `updateRadioOption` function works, remove the fu
 You should remove the `updateRadioOption` function call from your `else` clause.
 
 ```js
-assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
index f5c2d4a65ed..9c33572cb3c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
@@ -18,19 +18,19 @@ Below your `if` statement, include an `else` clause that assigns `1` to `counts[
 You should have an `if` statement with a condition of `counts[num]`.
 
 ```js
-assert.match(code, /if\s*\(\s*counts\[num\]\s*\)/);
+assert.match(code, /if\s*\(\s*counts\s*\[\s*num\s*\]\s*\)/);
 ```
 
 You should use the `++` operator to increment the value of `counts[num]` by `1` inside your `if` statement.
 
 ```js
-assert.match(code, /counts\[num\]\s*\+\s*=\s*1|counts\[num\]\+\+/);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*\+\s*=\s*1|counts\s*\[\s*num\s*\]\s*\+\+/);
 ```
 
 You should assign `1` to `counts[num]` inside your `else` clause.
 
 ```js
-assert.match(code, /else\s*\{\s*counts\[num\]\s*=\s*1\s*;?\s*\}/);
+assert.match(code, /else\s*\{\s*counts\s*\[\s*num\s*\]\s*=\s*1\s*;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
index 0e4cdabf301..05ec5644a59 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
@@ -22,7 +22,7 @@ assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s
 You should assign `counts[num]` to your `count` variable.
 
 ```js
-assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\[num\]\s*;?\s*}/);
+assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\s*\[\s*num\s*\]\s*;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
index 654738870e5..7eff7d1311f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
@@ -16,7 +16,7 @@ Now, try rolling the dice again and you should see that the previous score `inpu
 You should call the `resetRadioOption` function inside the `rollDiceBtn` callback function.
 
 ```js
-assert.match(code, /resetRadioOption\(\);?/);
+assert.match(code, /resetRadioOption\(\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
index 459cd70639f..d865ac5c479 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
@@ -22,7 +22,7 @@ assert.isFunction(resetGame);
 You should use arrow syntax for your `resetGame` function.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*}\s*;?/);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
index 636cf704db9..c2d0124f45b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
@@ -24,25 +24,25 @@ assert.match(code, /diceValuesArr\s*=\s*\[\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s
 You should reassign the `score` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `totalScore` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `rolls` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `round` variable to `1`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
index 523646668c6..72c6346ec48 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
@@ -14,13 +14,13 @@ To reset each of the dice values to show `0`, apply a `forEach` method to the `l
 You should call the `forEach` method of the `listOfAllDice` variable.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
 ```
 
 For your callback function, you should use `dice` and `index` as parameters.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
index bceebf06d0c..4587c689dbd 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
@@ -14,13 +14,13 @@ Inside your callback function, update the `dice` text content by assigning it th
 You should access the `textContent` property of the `dice` parameter.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
 ```
 
 You should assign `diceValuesArr[index]` to `dice.textContent`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
index d9d2254d91c..ac27421e036 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
@@ -20,25 +20,25 @@ Lastly, update the `currentRoundText` text content by assigning it the `round` v
 You should assign `totalScore` to `totalScoreText.textContent`.
 
 ```js
-assert.match(code, /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
+assert.match(resetGame.toString(), /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
 ```
 
 You should use the `innerHTML` property to set the `scoreHistory` to an empty string.
 
 ```js
-assert.match(code, /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
+assert.match(resetGame.toString(), /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
 ```
 
 You should assign `rolls` to `currentRoundRollsText.textContent`.
 
 ```js
-assert.match(code, /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
+assert.match(resetGame.toString(), /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
 ```
 
 You should assign `round` to `currentRoundText.textContent`.
 
 ```js
-assert.match(code, /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
+assert.match(resetGame.toString(), /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
index 978874172e8..3268be340c7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
@@ -16,7 +16,7 @@ Assign the entire result of your `ternary` to `counts[num]`.
 You should assign `counts[num] ? counts[num] + 1 : 1` to `counts[num]` in the `for...of` loop.
 
 ```js
-assert.match(code, /counts\[num\]\s*=\s*counts\[num\]\s*\?\s*counts\[num\]\s*\+\s*1\s*:\s*1\s*;?/s);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*=\s*counts\s*\[\s*num\s*\]\s*\?\s*counts\s*\[\s*num\s*\]\s*\+\s*1\s*:\s*1\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
index c7723dbd5b6..25b6dd20525 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasThreeOfAKind\s*=/);
 You should assign `Object.values(counts)` to your `hasThreeOfAKind` variable.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(3)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\)\.includes\(3\)\s*;?/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*3\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
index 0f24bfe79d5..db8abfb0753 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasPair\s*=/);
 You should assign `Object.values(counts)` to your `hasPair` variable.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(2)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\)\.includes\(2\)\s*;?/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*2\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
index 863b3754a2f..941bb22e700 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
@@ -36,7 +36,7 @@ assert.match(code, /const\s+sortedNumbersArr\s*=\s*arr\.sort\(.*\);?/);
 Your callback function should use `a` and `b` for the parameters and implicitly return `a - b`.
 
 ```js
-assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(a,\s*b\)\s*=>\s*a\s*-\s*b\s*\));?/);
+assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(\s*a,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\));?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
index baa492b3e3d..17b67567e35 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+smallStraightsArr\s*=?\s*;?/);
 You should store the strings `1234`, `2345` and `3456` in an array and assign it to your `smallStraightsArr`.
 
 ```js
-assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\];?/);
+assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
index 6dc543dffb7..80157d2f32e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+largeStraightsArr\s*=?\s*;?/);
 You should store the strings `12345` and `23456` in an array and assign it to your `largeStraightsArr`.
 
 ```js
-assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\];?/);
+assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
index 2df5ee0c9d4..64bfddd6fef 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `smallStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `3` and `30` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
index 2ecc8d9ec97..e6e3384a3a4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `largeStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `4` and `40` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
index e5a1605885c..ca4b986977d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
@@ -16,7 +16,7 @@ Inside the `animate` function, create an `if` statement where the condition chec
 You should have an `if` statement that checks if the right key was pressed and the player's `x` position is less than 400.
 
 ```js
-assert.match(animate.toString(), /keys\.rightKey\.pressed\s*&&\s*player\.position\.x\s*<\s*400/);
+assert.match(animate.toString(), /keys\.rightKey\.(pressed|pressed\s*===\s*true)\s*&&\s*player\.position\.x\s*<\s*400/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
index 2dd8988b3d3..1693966387d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
@@ -30,7 +30,7 @@ assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*
 You should call the `draw` method on each `platform`.
 
 ```js
-assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\)\s*;?\s*}?\s*\);?/);
+assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\s*\)\s*;?\s*}?\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
index 8abb4f37971..770301a6d04 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
@@ -26,7 +26,7 @@ Your callback function should have a `platform` parameter.
 
 ```js
 const splitter = code.split("platform.position.x += 5;")
-assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\);?/);
+assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
index d6f47677a71..ba57d13913c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
@@ -9,17 +9,17 @@ dashedName: step-78
 
 Inside the callback function, create a new `const` variable called `collisionDetectionRules` and assign it an empty array.
 
-Inside that array, add a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+Inside that array, add a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 # --hints--
 
 You should have a `const` variable called `collisionDetectionRules` that is assigned an empty array.
 
 ```js
-assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\];?/);
+assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\s*\]\s*;?/);
 ```
 
-You should have a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+You should have a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 ```js
 assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*player\.position\.y\s*\+\s*player\.height\s*<=\s*platform\.position\.y\s*,?\s*]\s*;?/);
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
index d894a52a413..8d752127274 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
@@ -14,7 +14,7 @@ Inside that array, add a boolean expression that checks if the player's `x` posi
 You should have a boolean expression that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
index 40fbc8593a6..20e1874b7f6 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
@@ -14,7 +14,7 @@ Below that boolean expression, add another boolean expression that checks if the
 You should have a boolean expression that checks if the player's `x` position is less than or equal to the sum of the platform's `x` position and the platform's width minus one third of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
index 25eace369e2..4c9f5ce6577 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
@@ -16,21 +16,21 @@ Below that, add another boolean expression that checks if the player's `y` posit
 You should not alter the existing `platformDetectionRules` array and its content.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position plus the player's height is greater than or equal to the platform's `y` position.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position is less than or equal to the sum of the platform's `y` position plus the platform's height.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\]\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
index bad8e28a783..16eeb4d7a2b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
@@ -19,21 +19,21 @@ Your `CheckPoint` class should have a `draw` method.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{/);
 ```
 
 Your `draw` method should have a `fillStyle` property.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
 ```
 
 Your `draw` method should have a `fillRect` method.
 
 ```js
 const splitter = code.split('#f1be32')
-assert.match(splitter[1], /ctx\.fillRect\(this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\);?/);
+assert.match(splitter[1], /ctx\.fillRect\(\s*this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
index 33c00e52dab..b2fc6afe9fe 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
@@ -25,14 +25,14 @@ assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\([^
 Your callback function should have a `checkpoint` parameter.
 
 ```js
-assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*[^)]*\s*\)\s*;?/);
+assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*[^)]*\s*\)\s*;?/);
 
 ```
 
 You should implicitly return a new `CheckPoint` instance.
 
 ```js
-assert.match(code, /\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
+assert.match(code, /\s*checkpointPositions\.map\s*\(\s*(\(checkpoint\s*\)|checkpoint)\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
index 0ea52d8429c..5f974795464 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
@@ -24,13 +24,13 @@ assert.match(code, /\bcheckpoints\b\s*\.\s*forEach\s*\(/s);
 You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*checkpoint\s*=>\s*{/s);
+assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*{?/s);
 ```
 
 You should call the `draw` method on each `checkpoint` inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\.forEach\s*\(\s*checkpoint\s*=>\s*{\s*checkpoint\.draw\(\s*\);?\s*}\s*\);?/s);
+assert.match(code, /\s*checkpoints\.forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*(\{\s*checkpoint\.draw\(\s*\)\s*;?\s*\}|checkpoint\.draw\(\s*\))\s*\)\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
index 9f4165a5498..030af11225b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
@@ -24,7 +24,7 @@ You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
 const splitter = code.split("if (keys.rightKey.pressed && isCheckpointCollisionDetectionActive)")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(?checkpoint\)?\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*\{/);
 ```
 
 You should use the subtraction assignment operator to subtract 5 from the `checkpoint`'s `x` position.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
index eb165e4d116..bcaf74e9bbc 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
@@ -42,7 +42,7 @@ assert.match(code, /\s*setTimeout\s*\(\s*\(\s*\)\s*=>[^,]*,\s*2000\s*\)/s);
 Your callback function should set the `checkpointScreen` `display` property to `none`.
 
 ```js
-assert.match(code, /\s*if\s*\(isCheckpointCollisionDetectionActive\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
+assert.match(code, /\s*if\s*\(\s*isCheckpointCollisionDetectionActive\s*\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
index 02408aeae38..b92e78f238b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
@@ -24,7 +24,7 @@ Your callback function should have a `checkpoint` parameter and `index`.
 
 ```js
 const splitter = code.split("player.velocity.y = gravity;")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(checkpoint,\s*index\)\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*\(\s*checkpoint,\s*index\s*\)\s*=>\s*\{/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
index 556a5fa4559..60613651225 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
@@ -14,7 +14,7 @@ Inside the `if` statement, call the `claim` method on the `checkpoint` object.
 You should call the `claim()` method on the `checkpoint` object.
 
 ```js
-assert.match(code, /checkpoint\.claim\(\);?/)
+assert.match(code, /checkpoint\.claim\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
index 8033d8d0526..86b41be465c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
@@ -24,7 +24,7 @@ assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\
 You should call the `showCheckpointScreen` function and pass in "You reached the final checkpoint!" as an argument.
 
 ```js
-assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\);?/)
+assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(\s*("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\s*\);?/)
 ```
 
 You should call the `movePlayer` function and pass in the provided arguments.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
index cdf73aea046..d4f5c452787 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
@@ -18,37 +18,37 @@ Begin by accessing the `task-form`, `confirm-close-dialog`, and `open-task-form-
 You should use `getElementById()` to access the `task-form` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should assign the `task-form` element to the variable `taskForm`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `confirm-close-dialog` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should assign the `confirm-close-dialog` element to the variable `confirmCloseDialog`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `open-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `open-task-form-btn` element to the variable `openTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
index 3a16270a70b..3b86da35b45 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
@@ -14,37 +14,37 @@ You need to access more elements with the `getElementById()` method. This time y
 You should use `getElementById()` to access the `close-task-form-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `close-task-form-btn` element to the variable `closeTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `add-or-update-task-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should assign the `add-or-update-task-btn` element to the variable `addOrUpdateTaskBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `cancel-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 You should assign the `cancel-btn` element to the variable `cancelBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
index 9c344045035..142aac41664 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
@@ -14,37 +14,37 @@ Next, access the `discard-btn`, `tasks-container`, and `title-input` elements us
 You should use `getElementById()` to access the `discard-btn` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should assign the `discard-btn` element to the variable `discardBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `tasks-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should assign the `tasks-container` element to the variable `tasksContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `title-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 You should assign the `title-input` element to the variable `titleInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
index f2d2d96b3dd..8edbbc8d841 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
@@ -14,25 +14,25 @@ The last set of elements you need to get from the HTML file are the `date-input`
 You should use `getElementById()` to access the `date-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should assign the `date-input` element to the variable `dateInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should use `getElementById()` to access the `description-input` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 You should assign the `description-input` element to the variable `descriptionInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
index 3b5cdba1dd1..11cfef6c0ff 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
@@ -13,16 +13,40 @@ Use `let` to create a `currentTask` variable and set it to an empty object. This
 
 # --hints--
 
-You should create a `taskData` constant set to an empty array.
+You should have a `const` variable called `taskData`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=/)
 ```
 
-You should use `let` to create an empty `currentTask` object.
+You should assign an array to your `taskData` constant.
 
 ```js
-assert.match(code, /let\s+currentTask\s*=\s*\{\};?/)
+assert.isArray(taskData);
+```
+
+Your `taskData` array should be empty.
+
+```js
+assert.isEmpty(taskData);
+```
+
+You should use `let` to create a `currentTask` variable.
+
+```js
+assert.match(code, /let\s+currentTask/);
+```
+
+You should assign an object to your `currentTask` variable.
+
+```js
+assert.isObject(currentTask);
+```
+
+Your `currentTask` object should be empty.
+
+```js
+assert.isEmpty(currentTask);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
index 1eb043cb3fd..41ba6741dcb 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
@@ -7,9 +7,15 @@ dashedName: step-7
 
 # --description--
 
-Add a `click` event listener to the `closeTaskFormBtn` variable, then use the `showModal()` method on your `confirmCloseDialog` variable. This will display a modal with the `Discard` and `Cancel` buttons.
+The HTML `dialog` element has a `showModal()` method that can be used to display a modal dialog box on a web page.
 
-`showModal()` is a method associated with the HTML `dialog` element. It is used to display a modal dialog box on a web page.
+```js
+dialogElement.showModal();
+```
+
+Add an event listener to the `closeTaskFormBtn` variable and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `showModal()` method on the `confirmCloseDialog` element. This will display a modal with the `Discard` and `Cancel` buttons.
 
 # --hints--
 
@@ -22,13 +28,13 @@ assert.match(code, /closeTaskFormBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `showModal()` method on `confirmCloseDialog`.
+Your event listener's callback function should call the `showModal()` method on the `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1,\s*\(.*\)\s*=>\s*{?\s*confirmCloseDialog\.showModal\(\);?\s*}?\s*\);?/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1,\s*\(.*\)\s*=>\s*(\{\s*confirmCloseDialog\.showModal\(\s*\)\s*;?\s*\}|confirmCloseDialog\.showModal\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
index 81a1acbd4c6..88a55e4d104 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
@@ -7,11 +7,15 @@ dashedName: step-8
 
 # --description--
 
-If the user clicks the `Cancel` button, you want to cancel the process (close the modal showing the two buttons) so the user can continue editing.
+If the user clicks the `Cancel` button, you want to cancel the process and close the modal so the user can continue editing. The HTML `dialog` element has a `close()` method that can be used to close a modal dialog box on a web page.
 
-Add a `click` event listener to the `cancelBtn` element, then use the `close()` method on the `confirmCloseDialog` variable.
+```js
+dialogElement.close();
+```
 
-`close()` is a method of the window object you can use to close the current window, or a modal you create with the `dialog` element.
+Add an event listener to the `cancelBtn` element and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `close()` method on the `confirmCloseDialog` element.
 
 # --hints--
 
@@ -24,13 +28,13 @@ assert.match(code, /cancelBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `close()` method on `confirmCloseDialog`. Don't use curly braces.
+Your event listener's callback function should call the `close()` method on `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1\,\s*\(\)\s*\s*=>\s*confirmCloseDialog\.close\(\)\s*\);?/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1\s*\,\s*\(\s*\)\s*=>\s*(\{\s*confirmCloseDialog\.close\(\s*\)\s*;?\s*\}|confirmCloseDialog\.close\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
index 0f104db09cd..058f7f3d88f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
@@ -28,19 +28,19 @@ assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1/)
 You should use arrow syntax to set your event listener to an empty pair of curly braces.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 Your event listener should use the `close()` method on `confirmCloseDialog`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?/)
 ```
 
 Your event listener should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
index 0d910058f4a..8e39170d182 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
@@ -22,19 +22,19 @@ assert.match(code, /taskForm\.addEventListener\(/)
 Your event listener should listen for a `submit` event.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1/)
 ```
 
 You should use arrow syntax to set your event listener to an empty pair of curly braces with `e` as the parameter.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
 ```
 
 You should use the `e.preventDefault()` method to stop the browser from reloading the page.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\);?/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
index a17c6199da1..e826bbb481d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
@@ -35,13 +35,13 @@ assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 You should pass in `item` as the parameter of the arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === currentTask.id`.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
index 7f6038173c3..cf3d5a9160b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
@@ -30,19 +30,19 @@ assert.match(code, /const\s+taskObj\s*=\s*\{\s*id/)
 You should use template strings to get `titleInput.value` as the value of your `id` key and convert it to lowercase.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)/)
 ```
 
 You should use `.split(' ')` on `titleInput.value.toLowerCase()`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(('|")\s{1}\1\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)/)
 ```
 
 You should use `.join('-')` on `titleInput.value.toLowerCase().split(' ')`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
index 2e54a140336..c67b0260985 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
@@ -20,13 +20,13 @@ Create an `if` statement with the condition `dataArrIndex === -1`. Within the `i
 You should create an `if` statement with the condition `dataArrIndex === -1`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{/)
 ```
 
 Your `if` statement should have `taskData.unshift(taskObj)` in it's body.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}/)
 ```
 
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
index 4aa0a4693bc..2e2a66182c1 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
@@ -26,7 +26,7 @@ assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*(\s*\{?\(\s*ta
 You should use addition assignment to set the `innerHTML` of `tasksContainer` to an empty pair of backticks.
 
 ```js
-assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\)?\s*\}?)/)
+assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\s*\)?\s*\}?)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
index 924947eea53..348db0f562b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
@@ -15,7 +15,7 @@ You should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("taskData.forEach")[1].split("});")
-assert.match(splitter[0], /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(splitter[0], /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
index 55cf11640d1..64d4f4ec0b8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
@@ -18,13 +18,13 @@ Use arrow syntax to create a `reset` function and set it to a pair of curly brac
 You should use `const` and arrow syntax to create a `reset` function.
 
 ```js
-assert.match(code, /const\s+reset\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+reset\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 Your `reset` function should be empty.
 
 ```js
-assert.match(reset.toString(), /\(\)\s*\{\s*\}/);
+assert.match(reset.toString(), /\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
index 28899e66a2b..52662015216 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
@@ -34,7 +34,7 @@ assert.match(reset.toString(), /descriptionInput\.value\s*=\s*('|")\1;?/)
 You should use `classList` to toggle the class `hidden` on `taskForm`
 
 ```js
-assert.match(reset.toString(), /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(reset.toString(), /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 You should set `currentTask` to an empty object.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
index de4d999ffa4..031e6ac8cea 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the `hidden` class on `taskForm`.
 
 ```js
 const splitter = code.split('<button type="button" class="btn">Delete</button>')
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /reset\(\)/)
+assert.match(code, /reset\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
index 3bf113666d5..0612e7fd015 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("confirmCloseDialog.close();")
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /confirmCloseDialog\.close\(\);?\s*reset\(\);?/)
+assert.match(code, /confirmCloseDialog\.close\(\s*\);?\s*reset\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
index a1a7b605c85..37cdfe262be 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
@@ -16,7 +16,7 @@ To begin, within the `closeTaskFormBtn` event listener, create a `formInputsCont
 You should use `const` to create a variable `formInputsContainValues` with the value `titleInput.value || dateInput.value || descriptionInput.value;`
 
 ```js
-assert.match(code, /const\s+formInputsContainValues\s*=\s*titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value;?/)
+assert.match(code, /const\s+formInputsContainValues\s*=\s*(titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value|titleInput\.value\s*!==\s*null\s*\|\|\s*dateInput\.value\s*!==\s*null\s*\|\|\s*descriptionInput\.value\s*!==\s*null)\;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
index 219fe7f668e..00a2f569d91 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
@@ -14,25 +14,25 @@ Create an `if` statement to check if `formInputsContainValues` is true. If `form
 You should create an `if` statement with the condition `formInputsContainValues`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{/)
 ```
 
 The `if` block of your `if` statement should contain `confirmCloseDialog.showModal();`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `reset()` function in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{\s*reset\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{\s*reset\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
index 8155371a01d..1d78a1a69f9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
@@ -16,7 +16,7 @@ Use arrow syntax to create an `addOrUpdateTask` function. Then move the `dataArr
 You should use `const` and arrow syntax to create an `addOrUpdateTask` function.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should move the `dataArrIndex` variable into the `addOrUpdateTask` function.
@@ -31,7 +31,7 @@ You should move the `taskObj` object into the `addOrUpdateTask` function.
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?/)
 ```
 
-You should move the `if` statement with the condition `dataArrIndex === 1` into your `addOrUpdateTask` function.
+You should move the `if` statement with the condition `dataArrIndex === -1` into your `addOrUpdateTask` function.
 
 ```js
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s*===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?\s*if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\)\s*;?\s*\}\s*\}\s*;?/)
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
index fec34e0763f..5d18bdbfdd4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
@@ -14,13 +14,13 @@ Use arrow syntax to create an `updateTaskContainer` function. Then move the `tas
 You should use `const` and arrow syntax to create a `updateTaskContainer` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 You should move `taskData.forEach()` and its content into the `updateTaskContainer()` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\{\s*id,\s*title,\s*date,\s*description\s*\}\)\s*=>\s*{\s*\(tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\)\s*}\s*\);?\s*\};?/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\s*\{\s*id,\s*title,\s*date,\s*description\s*\}\s*\)\s*=>\s*{\s*\(\s*tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\s*\)\s*}\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
index 337a01fbe36..b6e0d25064a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
@@ -14,13 +14,13 @@ Inside the `addOrUpdateTask` function, call the `updateTaskContainer` and `reset
 You should call the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\)\s*/)
+assert.match(code, /updateTaskContainer\(\s*\)\s*/)
 ```
 
 You should call the `reset` function after calling the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\);?\s*reset\(\);?\s*/)
+assert.match(code, /updateTaskContainer\(\s*\);?\s*reset\(\s*\);?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
index c0b463bd5b1..fa7c2620780 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
@@ -14,7 +14,7 @@ Now remove the `reset()` call inside the `taskForm` submit event listener and ca
 You should remove `reset()` and call `addOrUpdateTask()`.
 
 ```js
-assert.match(code, /addOrUpdateTask\(\)/)
+assert.match(code, /addOrUpdateTask\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
index f6ccf2ed0ba..44745624ac3 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
@@ -13,16 +13,16 @@ To enable editing and deleting for each task, add an `onclick` attribute to both
 
 # --hints--
 
-You should add `onclick="editTask(this)"` as the first attribute of the edit button.
+You should add `onclick="editTask(this)"` to your edit button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")editTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3\s*>Edit<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')editTask\(\s*this\s*\)\1)[^>]*>Edit<\/button>/);
 ```
 
-You should add `onclick="deleteTask(this)"` as the first attribute of the delete button.
+You should add `onclick="deleteTask(this)"` to your delete button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")deleteTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3>Delete<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')deleteTask\(\s*this\s*\)\1)[^>]*>Delete<\/button>/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
index 8ed95c58f6e..6e221522bb8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable and set its value using the `findIndex()` metho
 You should not alter the `deleteTask` function.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
index fcd4b4bb471..13f4c1d6c03 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
@@ -30,7 +30,7 @@ Use the `remove()` method to remove the `parentElement` of the `buttonEl` from t
 You should use the `remove()` method to remove the parent element of `buttonEl`.
 
 ```js
-assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\);?/)
+assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\s*\);?/)
 ```
 
 You should use `splice()` on the `taskData` array.
@@ -42,13 +42,13 @@ assert.match(deleteTask.toString(), /taskData\.splice\(/)
 The first argument of your `splice()` method should be `dataArrIndex`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex/)
 ```
 
 The second argument of your `splice()` method should be `1`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex,\s*1\);?/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex,\s*1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
index 7f68f1126ad..cb4787e8b40 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable. For its value, utilize the `findIndex()` metho
 You should not alter the `editTask` function.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
index 2b254ae367d..bcf1be10e70 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
@@ -14,7 +14,7 @@ Use square bracket notation to retrieve the task to be edited from the `taskData
 You should assign `taskData[dataArrIndex]` to `currentTask`.
 
 ```js
-assert.match(code, /currentTask\s*=\s*taskData\[dataArrIndex\];?/)
+assert.match(code, /currentTask\s*=\s*taskData\s*\[\s*dataArrIndex\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
index 6cdf503ba1f..0edabf81565 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
@@ -14,13 +14,13 @@ At this point, editing a task won't reflect when you submit the task. To make th
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 Your `else` block should have the code `taskData[dataArrIndex] = taskObj`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*taskData\[dataArrIndex\]\s*=\s*taskObj;?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*taskData\s*\[\s*dataArrIndex\s*\]\s*=\s*taskObj;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
index cb7566ca5c5..e30b638d8a4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
@@ -26,13 +26,13 @@ After that, open your browser console and go to the `Applications` tab, select `
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 Your `localStorage.setItem()` should have a value of `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*myTaskArr\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*myTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
index be99eb689ae..ffa352e44f7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
@@ -16,13 +16,13 @@ To resolve the issue, wrap the data you're saving in the `JSON.stringify()` meth
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 You should wrap `JSON.stringify()` around `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*JSON\.stringify\(myTaskArr\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*JSON\.stringify\(\s*myTaskArr\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
index eeb15ab7d93..f0edb7ddb0c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
@@ -16,13 +16,13 @@ Use the `getItem()` method to retrieve the `myTaskArr` array and assign it to th
 You should use `const` to create a `getTaskArr` variable and assign `localStorage.getItem("data")` to it.
 
 ```js
-assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(('|")data\1\);?/)
+assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\1\s*\);?/)
 ```
 
 You should log the `getTaskArr` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArr\);?/)
+assert.match(code, /console\.log\(\s*getTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
index c19a3cffa8e..4c2aeb27f9b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
@@ -18,13 +18,13 @@ Check the console to see the difference between `getTaskArr` and `getTaskObj`.
 You should use `const` to create a `getTaskArrObj` variable and assign it to `JSON.parse(localStorage.getItem('data'));`.
 
 ```js
-assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\);?/)
+assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\);?/)
 ```
 
 You should log the `getTaskArrObj` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArrObj\);?/)
+assert.match(code, /console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
index 0e6ba12f23e..2cddda21e4f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
@@ -16,7 +16,7 @@ Remove the `data` item from local storage and open the console to observe the re
 You should use `localStorage.removeItem()` to remove the `data` item from the browser's local storage.
 
 ```js
-assert.match(code, /localStorage\.removeItem\(('|")data\1\);?/)
+assert.match(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
index 5c1d97cecad..c5286917c6a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
@@ -16,13 +16,13 @@ Remove `localStorage.removeItem()` and use `localStorage.clear()` instead. You d
 You should remove `localStorage.removeItem("data")`.
 
 ```js
-assert.notMatch(code, /localStorage\.removeItem\(('|")data\1\);/)
+assert.notMatch(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);/)
 ```
 
 You should remove everything from the browser `local storage` with `localStorage.clear()`.
 
 ```js
-assert.match(code, /localStorage\.clear\(\);?/)
+assert.match(code, /localStorage\.clear\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
index 108111dd354..027a4c1915a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
@@ -14,7 +14,7 @@ Remove the `myTaskArr` array and all of the code for `localStorage` because you
 You should remove `myTaskArr` and all the code related to `localStorage` that you've just learned.
 
 ```js
-assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s"Walk\s*the\s*Dog",\s*date:\s*"22-04-2022"\s*\},\s*\{\s*task:\s"Read\s*some\s*books",\s*date:\s*"02-11-2023"\s*\},\s*\{\s*task:\s"Watch\s*football",\s*date:\s*"10-08-2021"\s*\},\s*\];?\s*localStorage\.setItem\("data", JSON\.stringify\(myTaskArr\)\);\s*localStorage\.clear\(\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\("data"\)\s*console\.log\(getTaskArr\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\("data"\)\);?\s*console\.log\(getTaskArrObj\);?/)
+assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s('|")Walk\s*the\s*Dog\1,\s*date:\s*('|")22-04-2022\2\s*\},\s*\{\s*task:\s('|")Read\s*some\s*books\3,\s*date:\s*('|")02-11-2023\4\s*\},\s*\{\s*task:\s('|")Watch\s*football\5,\s*date:\s*('|")10-08-2021\6\s*\},\s*\]\s*;?\s*localStorage\.setItem\(('|")data\7, JSON\.stringify\(\s*myTaskArr\s*\)\s*\);\s*localStorage\.clear\(\s*\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\8\s*\)\s*console\.log\(\s*getTaskArr\s*\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\9\s*\)\s*\);?\s*console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
@@ -316,7 +316,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -346,7 +346,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
index 0e129e11576..09b557ed3b8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
@@ -24,13 +24,13 @@ assert.match(code, /localStorage\.setItem\(/)
 You should pass in `"data"` as the first argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
index 06322345c09..3b503bc05e3 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
@@ -24,14 +24,14 @@ You should pass in `"data"` as the first argument of your `localStorage.setItem(
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
index 58965d759ab..dfc7c235156 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
@@ -16,7 +16,7 @@ Set `taskData` to the retrieval of `data` from local storage **or** an empty arr
 You should set the `taskData` variable to `JSON.parse(localStorage.getItem("data")) || [];`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\)\s*\|\|\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\)\s*\|\|\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -321,7 +321,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -352,7 +352,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
index 94fb87cf08f..74e9f28e815 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
@@ -20,13 +20,13 @@ With that, you've completed this project.
 You should create an `if` statement with `(taskData.length)` as the condition. As a reminder, `0` is a falsy value.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*/)
 ```
 
 You should call the `updateTaskContainer` function in your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*updateTaskContainer\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*updateTaskContainer\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
index 7e7e8b71f7c..2169d6496b2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
@@ -20,7 +20,7 @@ console.log(Date.now()); // 1628586800000
 You should attach `-${Date.now()}` to the existing value of the `id` key. Don't forget it needs to be inside the template string.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
index f8b038f98ec..f21fcdc5ab2 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
@@ -1,32 +1,18 @@
 ---
 id: 63e02a333354343b595d64ca
-title: Hatua ya 16
+title: Step 15
 challengeType: 0
-dashedName: step-16
+dashedName: step-15
 ---
 
 # --description--
 
-Now that you have tested the `Object.freeze()` method, you can delete those two lines of code from the last lesson.
-
 The next step is to access the key called `sport` from the `myFavoriteFootballTeam` object and assign it to a new `const` variable called `sport`.
 
 Remember you can use dot notation for this.
 
 # --hints--
 
-You should remove your assignment of the `USA` string to `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /myFavoriteFootballTeam\.team\s*=\s*('|"|`)USA\1\s*/);
-```
-
-You should remove your `console.log` for `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /console\.log\(\s*myFavoriteFootballTeam\.team\s*\)/);
-```
-
 You should use `const` to declare a `sport` variable.
 
 ```js
@@ -462,8 +448,6 @@ Object.freeze(myFavoriteFootballTeam);
 
 --fcc-editable-region--
 
-myFavoriteFootballTeam.team = "USA";
-console.log(myFavoriteFootballTeam.team);
 
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
index 5556a874e44..d9520c64e56 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
@@ -1,8 +1,8 @@
 ---
 id: 63e0334b7a24bd3c96aca4de
-title: Hatua ya 17
+title: Step 16
 challengeType: 0
-dashedName: step-17
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
index 849c8ab782a..e556c5c05e3 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e036373fc9173d284e165a
-title: Hatua ya 18
+title: Step 17
 challengeType: 0
-dashedName: step-18
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
index 450f0441145..2a8ea3b0d0b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
@@ -1,8 +1,8 @@
 ---
 id: 63e03b86008bbb3e1c3de846
-title: Hatua ya 19
+title: Step 18
 challengeType: 0
-dashedName: step-19
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
index 7e55b65060e..32ae955337d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
@@ -1,8 +1,8 @@
 ---
 id: 63e042661ad2663f0d468740
-title: Hatua ya 20
+title: Step 19
 challengeType: 0
-dashedName: step-20
+dashedName: step-19
 ---
 
 # --description--
@@ -15,7 +15,7 @@ Use object destructuring to access the `coachName` value.
 
 ```js
 
-assert.match(code, /const\s*{\s*coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach\s*/)
+assert.match(code, /const\s*{\s*(coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach|headCoach\s*:\s*{\s*coachName\s*}\s*}\s*=\s*myFavoriteFootballTeam)\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
index 57543395997..ed536a4b70e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
@@ -1,8 +1,8 @@
 ---
 id: 63e050bf935ac341b88326d6
-title: Hatua ya 21
+title: Step 20
 challengeType: 0
-dashedName: step-21
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
index ea69e283499..3562608e3f9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05557016dfd45ea49152c
-title: Hatua ya 22
+title: Step 21
 challengeType: 0
-dashedName: step-22
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
index c09b2d89021..70772e4cba9 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05c00b615bb46ac87273a
-title: Hatua ya 23
+title: Step 22
 challengeType: 0
-dashedName: step-23
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
index 49998d99a72..862d6c0fd77 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
@@ -1,8 +1,8 @@
 ---
 id: 63e060df21bca347b2d2b374
-title: Hatua ya 24
+title: Step 23
 challengeType: 0
-dashedName: step-24
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
index 717991385a9..5ea194d88aa 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e062d6090ebb486a4eda3a
-title: Hatua ya 25
+title: Step 24
 challengeType: 0
-dashedName: step-25
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
index bdfcc773c45..5cd7ea1d6e4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
@@ -1,8 +1,8 @@
 ---
 id: 63e949b8327aa2aca2ca8eac
-title: Hatua ya 26
+title: Step 25
 challengeType: 0
-dashedName: step-26
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
index ac38e13ffe3..b13000896fc 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
@@ -1,8 +1,8 @@
 ---
 id: 63e94dae6dcedbad73f2f6ee
-title: Hatua ya 27
+title: Step 26
 challengeType: 0
-dashedName: step-27
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
index fe874df4ecf..dbeb80c7a4c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
@@ -1,8 +1,8 @@
 ---
 id: 63e954321b0a77ae4f6d9650
-title: Hatua ya 28
+title: Step 27
 challengeType: 0
-dashedName: step-28
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
index 1d3a83cc5ba..3912e0e6228 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95a45dce95baf41dd4f78
-title: Hatua ya 29
+title: Step 28
 challengeType: 0
-dashedName: step-29
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
index 4120b4ee6d4..9a21ae45f28 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95e39860dc5b01ebe9be0
-title: Hatua ya 30
+title: Step 29
 challengeType: 0
-dashedName: step-30
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
index 3e3bc909cbb..e037852b3bc 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9667c881b61b1e338d276
-title: Hatua ya 31
+title: Step 30
 challengeType: 0
-dashedName: step-31
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
index 9cb835b9fe8..20e68b6415e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96938d2a347b2734a1587
-title: Hatua ya 32
+title: Step 31
 challengeType: 0
-dashedName: step-32
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
index c6ab75ec842..eb225b3116c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96eb94c97b6b31ee50f63
-title: Hatua ya 33
+title: Step 32
 challengeType: 0
-dashedName: step-33
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
index 58b12a5a198..401f8fcb289 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9718d7d490bb3940d5a0a
-title: Hatua ya 34
+title: Step 33
 challengeType: 0
-dashedName: step-34
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
index 13674249d02..e2cf0d8bbea 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9737f686c76b4078a60f4
-title: Hatua ya 35
+title: Step 34
 challengeType: 0
-dashedName: step-35
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
index 4c7d68574b1..0544b4bdd11 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28972973504e7bb58b0b3
-title: Hatua ya 36
+title: Step 35
 challengeType: 0
-dashedName: step-36
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
index 307b1d54d30..91426574c6f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28ef082d771e8bf71f94a
-title: Hatua ya 37
+title: Step 36
 challengeType: 0
-dashedName: step-37
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
index 3b9b69c683e..9ad6aab3caa 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
@@ -1,8 +1,8 @@
 ---
 id: 63f293c804d6f9e9a83ca4c5
-title: Hatua ya 38
+title: Step 37
 challengeType: 0
-dashedName: step-38
+dashedName: step-37
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Open the console, and make a selection from the teammates dropdown menu. You sho
 You should add a `console.log` with the value of `e.target.value`.
 
 ```js
-assert.match(code, /console\.log\s*\(e\.target\.value\)\s*/)
+assert.match(code, /console\.log\s*\(\s*e\.target\.value\s*\)\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
index 40a45f028af..f95cf6e5d4b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29804e3ec00ea6fab1ec4
-title: Hatua ya 39
+title: Step 38
 challengeType: 0
-dashedName: step-39
+dashedName: step-38
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Inside the callback function, access the `innerHTML` property of the `playerCard
 You should not have the `console.log` statement in your code.
 
 ```js
-assert.notMatch(code, /\s*console\.log\(e\.target\.value\)/);
+assert.notMatch(code, /\s*console\.log\(\s*e\.target\.value\s*\)/);
 ```
 
 You should access the `innerHTML` property of the `playerCards` element.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
index 74ae74cc80d..134d1331364 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29ce62aea65eb041758c8
-title: Hatua ya 40
+title: Step 39
 challengeType: 0
-dashedName: step-40
+dashedName: step-39
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /switch\s*\(\s*e\.target\.value\s*\)/);
 Your `switch` statement should be empty.
 
 ```js
-assert.match(code, /\s*switch\s*\(e\.target\.value\)\s*{\s*}/);
+assert.match(code, /\s*switch\s*\(\s*e\.target\.value\s*\)\s*{\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
index e72cacd792e..a3caf074b5c 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a0a860790eebe61bf908
-title: Hatua ya 41
+title: Step 40
 challengeType: 0
-dashedName: step-41
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
index 3dcb85a6e39..303dace84dc 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a4a8087e6dec8ec47f16
-title: Hatua ya 44
+title: Step 43
 challengeType: 0
-dashedName: step-44
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
index 3bba9f497fb..b66de0298ec 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a5f09a785aed155c0a56
-title: Hatua ya 45
+title: Step 44
 challengeType: 0
-dashedName: step-45
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
index 4b30f291108..f6cb13c7bc5 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a8e14fb388edd3242527
-title: Hatua ya 46
+title: Step 45
 challengeType: 0
-dashedName: step-46
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
index 32ad4576d71..3ff1f2396c8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2aa36fcdc63ee4e18fc37
-title: Hatua ya 47
+title: Step 46
 challengeType: 0
-dashedName: step-47
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
index b1e9cccec39..0543e8d3b98 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2ab4f6c52c5eec6d68de4
-title: Hatua ya 48
+title: Step 47
 challengeType: 0
-dashedName: step-48
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
index ce5529cef75..6cd48c0e9a8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
@@ -1,8 +1,8 @@
 ---
 id: 641fc88d8fa7127f76e0324f
-title: Hatua ya 42
+title: Step 41
 challengeType: 0
-dashedName: step-42
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
index b2936b997b2..11c8298ac82 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
@@ -1,8 +1,8 @@
 ---
 id: 641fcfd468185384ac218b7d
-title: Hatua ya 43
+title: Step 42
 challengeType: 0
-dashedName: step-43
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
index 8c19ffa3a62..831aa380783 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-After alerting the user if the number input is empty of the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
+After alerting the user if the number input is empty or the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
 
 Add the `return` keyword after `alert()`.
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
index fc96ee47f25..5d145ed23cc 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
@@ -24,7 +24,6 @@ Use the `.reverse()` method to reverse the order of the `remainders` array, and
 You should use the `.reverse()` method on the `remainders` array.
 
 ```js
-console.log(String(decimalToBinary))
 assert.match(String(decimalToBinary), /remainders\.reverse\(\s*\)/);
 ```
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
index a96fcd24e5e..eabe13a607e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
@@ -31,7 +31,7 @@ assert.notMatch(String(decimalToBinary), /else\s+if\s*\([\s\S]+\)/);
 Your `decimalToBinary()` function should have an `if` statement that checks if `input` is equal to `0` or `1`.
 
 ```js
-assert.match(String(decimalToBinary), /if\s*\(input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
+assert.match(String(decimalToBinary), /if\s*\(\s*input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(\s*input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
 ```
 
 If input is equal to `0` or `1`, your `decimalToBinary()` function should return `String(input)`.
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
index 5a4f5f808cc..6878dcb1309 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
@@ -44,7 +44,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1000` as the second argument to the `setTimeout` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
index 53dbe83df75..329b1a3b446 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
@@ -48,7 +48,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
index e38f1946728..06fa0a5775a 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
@@ -46,7 +46,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
index f1208b9273d..d839d2f8769 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the `id` attribute to the `inputVal`
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
index 7285b816c59..a88b734a222 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the text of the paragraph element to
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
index 02908aeec95..4a948981b3b 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `showMsgDelay` property of the c
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)showMsgDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)showMsgDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
index 1acf852ee96..b413729868e 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
@@ -18,7 +18,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
index bb0c0826131..fde12265000 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
@@ -27,7 +27,7 @@ You should set the `textContent` property of the targeted element equal to the `
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\[\s*('|"|`)\s*msg\s*\1\s*\]/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\s*\[\s*('|"|`)\s*msg\s*\1\s*\]/
 );
 ```
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
index e53044ba7ea..36a25d610cf 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `removeElDelay` property of the
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)removeElDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)removeElDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
index 5c1748e316d..c8cff5fb700 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
@@ -16,7 +16,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.lengthOf(
   String(showAnimation).match(
-    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
+    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
   ),
   2
 );
@@ -27,7 +27,7 @@ You should chain the `.remove()` method to the `.getElementById()` method.
 ```js
 assert.match(
   String(showAnimation),
-  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
+  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
 );
 ```
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
index c44af0d037d..a31898c377d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
@@ -18,7 +18,7 @@ You should set the `textContent` property of `result` equal to calling `decimalT
 ```js
 assert.match(
   String(showAnimation),
-  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\[('|"|`)textContent\1\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
+  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\s*\[\s*('|"|`)textContent\1\s*\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
 );
 ```
 
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
index fe5caa56ba1..8a870a20649 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
@@ -9,9 +9,9 @@ dashedName: step-5
 
 Back in your event listener, you need to update the text of the `result` element.
 
-Use a ternary operator to update the text of the `result` element after the `if` statement. Check the truthiness of calling `isSpam()` on the value of the `messageInput` element. If true, set the text to `Oh no! This looks like a spam message.`. Otherwise, set the text to `This message does not seem to contain any spam.`
+After the `if` statement, use a ternary operator to check the truthiness of calling `isSpam()` with `messageInput.value` as the argument. If true, set the `textContent` property on the `result` element to `Oh no! This looks like a spam message.`. Otherwise, set it to `This message does not seem to contain any spam.`
 
-Then set the `messageInput` element's value to an empty string.
+Then set the `messageInput` element's `value` property to an empty string.
 
 # --hints--
 
@@ -21,10 +21,10 @@ You should use the assignment operator to set the `textContent` property of the
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*/)
 ```
 
-You should assign the `isSpam()` function call to `result.textContent`.
+You should call the `isSpam()` function after the assignment operator `=` and before the `?` ternary operator.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(.*\)\s*\?/)
 ```
 
 You should use ternary syntax to check the truthiness of `isSpam(messageInput.value)`.
@@ -45,10 +45,10 @@ The falsy expression of your ternary should set the `textContent` property of th
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*/);
 ```
 
-After your ternary, set the `value` of `messageInput` to an empty string.
+After your ternary, set the `value` property on the `messageInput` element to an empty string.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5\s*;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
index e0afd9e0ada..6f59a41993d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
@@ -24,13 +24,13 @@ assert.match(code, /const\s+currentDateParagraph\s+=/);
 You should use `document.getElementById()` to get the `#current-date` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)current-date\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)current-date\1\s*\)/);
 ```
 
 You should assign the `#current-date` element to your `currentDateParagraph` variable.
 
 ```js
-assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(('|"|`)current-date\1\)/g));
+assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(\s*('|"|`)current-date\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
index 9b4c971c8d4..eee92d47e1f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+dateOptionsSelectElement\s+=/);
 You should use `document.getElementById()` to get the `#date-options` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)date-options\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)date-options\1\s*\)/);
 ```
 
 You should assign the `#date-options` element to your `dateOptionsSelectElement` variable.
 
 ```js
-assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(('|"|`)date-options\1\)/g));
+assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(\s*('|"|`)date-options\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
index afd92ae0d6d..c05c2bd85e8 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
@@ -32,7 +32,7 @@ assert.match(code, /const\s+date\s+=/);
 You should assign a `Date` object to your `date` variable with `new Date()`.
 
 ```js
-assert(code.match(/const\s+date\s+=\s+new\s+Date\(\)/g));
+assert(code.match(/const\s+date\s+=\s+new\s+Date\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
index e02618ab928..c77de1fbafd 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
@@ -30,7 +30,7 @@ assert.match(code, /const\s+day\s+=/);
 You should assign the `date.getDate()` to your `day` variable.
 
 ```js
-assert(code.match(/const\s+day\s+=\s+date\.getDate\(\)/g));
+assert(code.match(/const\s+day\s+=\s+date\.getDate\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
index 0e9963b07ad..dfb4994318f 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+month\s+=/);
 You should assign the `date.getMonth() + 1` to your `month` variable.
 
 ```js
-assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\)\s*\+\s*1/g));
+assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\s*\)\s*\+\s*1/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
index 042affc322a..bd58ccc5a72 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+year\s+=/);
 You should assign the `date.getFullYear()` to your `year` variable.
 
 ```js
-assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\)/g));
+assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
index 93991ab9663..42a9b1a7290 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+hours\s+=/);
 You should assign the `date.getHours()` to your `hours` variable.
 
 ```js
-assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\)/g));
+assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
index a1277f2861b..fbdcdc06f8d 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+minutes\s+=/);
 You should assign the `date.getMinutes()` to your `minutes` variable.
 
 ```js
-assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\)/g));
+assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
index 7a11c3f4f60..d0df34d65ca 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
@@ -16,7 +16,7 @@ Open up the console and you should see the date printed out.
 You should have a `console.log(formattedDate)` line in your code.
 
 ```js
-assert.match(code, /console\.log\(formattedDate\)/);
+assert.match(code, /console\.log\(\s*formattedDate\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
index 6ecc90ab1c7..c374fbc08f7 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
@@ -22,7 +22,7 @@ assert(code.match(/currentDateParagraph\.textContent\s*=\s*formattedDate/g));
 You should not have a `console.log(formattedDate);` line in your code.
 
 ```js
-assert.notMatch(code, /console\.log\(formattedDate\);/);
+assert.notMatch(code, /console\.log\(\s*formattedDate\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
index 85b9666c0d5..3817dbd1ef4 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
@@ -15,11 +15,17 @@ element.addEventListener("change", () => {
 });
 ```
 
-Chain the `addEventListener` method to `dateOptionsSelectElement` where the first argument is `change` and the second argument is an empty arrow function.
+Attach the `addEventListener` method to the `dateOptionsSelectElement`. The first argument of the event listener should be the string `change` and the second argument should be an empty arrow function.
 
 # --hints--
 
-You should use the `addEventListener` method to add a `change` event listener to `dateOptionsSelectElement`.
+You should attach the `addEventListener` method to the `dateOptionsSelectElement`.
+
+```js
+assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(/g));
+```
+
+Your event listener should listen for a `change` event.
 
 ```js
 assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(\s*('|")change\1/g));
diff --git a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
index ed0246c73ea..7df26771a29 100644
--- a/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
+++ b/curriculum/challenges/swahili/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
@@ -22,7 +22,7 @@ Chain the `.reverse()` method to the end of `.split()` method.
 You should use the `.reverse()` method to reverse the order of the array returned by `.split()`.
 
 ```js
-assert(code.match(/\.reverse\(\)/g));
+assert(code.match(/\.reverse\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/swahili/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md b/curriculum/challenges/swahili/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
index a721563d96d..1f1a60542e3 100644
--- a/curriculum/challenges/swahili/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
+++ b/curriculum/challenges/swahili/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
@@ -109,7 +109,6 @@ assert(getCorrectStyle()?.textAlign === 'center');
 # --seed--
 
 ## --seed-contents--
-
 ```css
 ```
 
diff --git a/curriculum/challenges/swahili/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md b/curriculum/challenges/swahili/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
index 6480354b9f3..cf7e94d0967 100644
--- a/curriculum/challenges/swahili/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
+++ b/curriculum/challenges/swahili/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
@@ -29,4 +29,4 @@ They are outdated technologies.
 
 ## --video-solution--
 
-1
+2
diff --git a/curriculum/challenges/swahili/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md b/curriculum/challenges/swahili/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
index fa5b427fdc5..857d52d4c51 100644
--- a/curriculum/challenges/swahili/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
+++ b/curriculum/challenges/swahili/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
@@ -1,5 +1,5 @@
 ---
-id: 657e0d0037192f3d9e3d5417 
+id: 657e0d0037192f3d9e3d5417
 title: Task 128
 challengeType: 22
 dashedName: task-128
diff --git a/curriculum/challenges/swahili/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md b/curriculum/challenges/swahili/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
index f8949309ce8..8b4e002d454 100644
--- a/curriculum/challenges/swahili/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
+++ b/curriculum/challenges/swahili/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
@@ -13,7 +13,7 @@ Bob: Alright, team. This is Alice's first day with _ , so please let _ introduce
 -->
 # --description--
 
-You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sould more natural. Listen for the object pronouns Bob uses in this audio.
+You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sound more natural. Listen for the object pronouns Bob uses in this audio.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/swahili/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md b/curriculum/challenges/swahili/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
index 46b65350213..1a295854b79 100644
--- a/curriculum/challenges/swahili/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
+++ b/curriculum/challenges/swahili/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
@@ -26,8 +26,8 @@ The algorithm follows:
   <li>Seed the RNG with the number of the deal.
   </li><li>Create an array of 52 cards: Ace of Clubs, Ace of Diamonds, Ace of Hearts, Ace of Spades, 2 of Clubs, 2 of Diamonds, and so on through the ranks: Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King. The array indexes are 0 to 51, with Ace of Clubs at 0, and King of Spades at 51.</li>
   <li>Until the array is empty:</li>
-  <li>Choose a random card at index ≡ next random number (mod array length).</li>
     <ul>
+      <li>Choose a random card at <i>index</i> ≡ <i>next random number</i> (mod <i>array length</i>).</li>
       <li>Swap this random card with the last card of the array.</li>
       <li>Remove this random card from the array. (Array length goes down by 1.)</li>
       <li>Deal this random card.</li>
diff --git a/curriculum/challenges/swahili/22-rosetta-code/rosetta-code-challenges/execute-brain.md b/curriculum/challenges/swahili/22-rosetta-code/rosetta-code-challenges/execute-brain.md
index 48d59d8daf9..62a7d597284 100644
--- a/curriculum/challenges/swahili/22-rosetta-code/rosetta-code-challenges/execute-brain.md
+++ b/curriculum/challenges/swahili/22-rosetta-code/rosetta-code-challenges/execute-brain.md
@@ -16,16 +16,16 @@ Below are links to each of the versions of RCBF.
 
 An implementation need only properly implement the following instructions:
 
-| Command                   | Description                                                                                 |
-| ------------------------- | ------------------------------------------------------------------------------------------- |
-| <code>></code> | Move the pointer to the right                                                               |
-| <code>&lt;</code> | Move the pointer to the left                                                                |
-| <code>+</code> | Increment the memory cell under the pointer                                                 |
-| <code>-</code> | Decrement the memory cell under the pointer                                                 |
-| <code>.</code> | Output the character signified by the cell at the pointer                                   |
-| <code>,</code> | Input a character and store it in the cell at the pointer                                   |
-| <code>\[</code> | Jump past the matching <code>]</code> if the cell under the pointer is 0           |
-| <code>]</code> | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
+| Command           | Description                                                                        |
+| ----------------- | ---------------------------------------------------------------------------------- |
+| <code>></code>    | Move the pointer to the right                                                      |
+| <code>&lt;</code> | Move the pointer to the left                                                       |
+| <code>+</code>    | Increment the memory cell under the pointer                                        |
+| <code>-</code>    | Decrement the memory cell under the pointer                                        |
+| <code>.</code>    | Output the character signified by the cell at the pointer                          |
+| <code>,</code>    | Input a character and store it in the cell at the pointer                          |
+| <code>\[</code>   | Jump past the matching <code>]</code> if the cell under the pointer is 0           |
+| <code>]</code>    | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
 
 Any cell size is allowed, EOF (*E*nd-*O*-*F*ile) support is optional, as is whether you have bounded or unbounded memory.
 
diff --git a/curriculum/challenges/ukrainian/02-javascript-algorithms-and-data-structures/basic-data-structures/add-key-value-pairs-to-javascript-objects.md b/curriculum/challenges/ukrainian/02-javascript-algorithms-and-data-structures/basic-data-structures/add-key-value-pairs-to-javascript-objects.md
index d149951dc36..912f72b8df8 100644
--- a/curriculum/challenges/ukrainian/02-javascript-algorithms-and-data-structures/basic-data-structures/add-key-value-pairs-to-javascript-objects.md
+++ b/curriculum/challenges/ukrainian/02-javascript-algorithms-and-data-structures/basic-data-structures/add-key-value-pairs-to-javascript-objects.md
@@ -102,10 +102,10 @@ const foods = {
   plums: 28
 };
 
-// Only change code above this line
-
 // Only change code below this line
 
+// Only change code above this line
+
 console.log(foods);
 ```
 
diff --git a/curriculum/challenges/ukrainian/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md b/curriculum/challenges/ukrainian/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
index 6a822d52591..fa315a92947 100644
--- a/curriculum/challenges/ukrainian/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
+++ b/curriculum/challenges/ukrainian/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.md
@@ -22,7 +22,8 @@ dashedName: record-collection
 -   Ваша функція завжди повинна повертати весь об’єкт `records`.
 -   Якщо `value` є пустим рядком, видаліть дану властивість `prop` з альбому.
 -   Якщо `prop` не є `tracks` та `value` не є пустим рядком, призначте `value` до `prop` альбому.
--   Якщо `prop` є `tracks` та `value` не є пустим рядком, вам треба оновити масив `tracks` в альбомі. Якщо альбом не має властивості `tracks`, то призначте порожній масив. Потім додайте `value` як останній елемент у масиві `tracks` альбому.
+-   If `prop` is `tracks` and `value` isn't an empty string, but the album doesn't have a `tracks` property, create an empty array and add `value` to it.
+-   If prop is `tracks` and `value` isn't an empty string, add `value` to the end of the album's existing `tracks` array.
 
 **Примітка:** копія об’єкту `recordCollection` використовується для тестів. Ви не повинні напряму змінювати об’єкт `recordCollection`.
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
index 4c0bbbb76d0..cfa2c88c40c 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/65578c17d54dfab65cd54b95.md
@@ -19,8 +19,8 @@ You should use the `append()` method to append `start` to `paths[start]`.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\.append\s*\(\s*start\s*\)/m));
+    const {function_body} = shortest;
+    assert(function_body.match(/^\s{4}paths\s*\[\s*start\s*\]\s*\.append\s*\(\s*start\s*\)/m));
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
index 15783fd7272..b37dd0daf9b 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557913b8fe5c0bc834c9f4f.md
@@ -27,8 +27,8 @@ You should call `extend()` on the neighbour node path passing the current node p
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)if\s+paths\s*\[\s*node\s*\]\s*\[\s*-\s*1\s*\]\s*==\s*node\s*:\s*^\1(\s{4})paths\s*\[\s*node\s*\]\s*=\s*paths\s*\[\s*current\s*\]\s*^\1else\s*:\s*^\1\2paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
index aa6acacba21..dbac5a53209 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/655791847db8a9bd0b685f40.md
@@ -16,8 +16,8 @@ You should append `node` to `paths[node]` just after your `else` statement.
 ```js
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
-    const {function_body} = shortest;    
-    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\.append\s*\(\s*node\s*\)/ms));
+    const {function_body} = shortest;
+    assert(function_body.match(/^(\s*)else\s*:\s*^\1\s{4}paths\s*\[\s*node\s*\]\s*\.extend\s*\(\s*paths\s*\[\s*current\s*\]\s*\)\s*^\1paths\s*\[\s*node\s*\]\s*\.append\s*\(\s*node\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
index af9e614049d..cbab2f3f4e2 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6557927ad11e58bf8c794b25.md
@@ -28,7 +28,7 @@ You should print the provided string inside your new `for` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
+    assert(function_body.match(/^(\s{4})for\s+node\s+in\s+targets_to_print\s*:\s*^\1\1print\s*\(\s*f("|')\\n\{\s*start\s*\}-\{\s*node\s*\}\sdistance:\s\{\s*distances\s*\[\s*node\s*\]\s*\}\\nPath:\s\{\s*(?=[^\1])("|')\s->\s\3\.join\s*\(\s*paths\s*\[\s*node\s*\]\s*\)\s*\}\2\s*\)/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
index 066328c1ddb..b77c8dd3332 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6559d70c5161b16ff1d6530d.md
@@ -32,7 +32,7 @@ You should create a variable called `targets_to_print` after your `while` loop.
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=/ms));
   }
 })
 ```
@@ -43,7 +43,7 @@ You should the ternary syntax to assign `[target]` when `target` is truthy, and
 ({ test: () =>  {
     const shortest = __helpers.python.getDef(code, "shortest_path");
     const {function_body} = shortest;    
-    assert(function_body.match(/unvisited\.remove\(current\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
+    assert(function_body.match(/unvisited\.remove\(\s*current\s*\).*^\s{4}targets_to_print\s*=\s*\[\s*target\s*\]\s+if\s+target\s+else\s+graph/ms));
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
index d24ffe9dfc6..74c66608ec6 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-algorithm-design-by-building-a-shortest-path-algorithm/6579cbab9825b8170974c69a.md
@@ -25,7 +25,7 @@ Just before your `print()` call, use the `del` keyword to delete the `age` key a
 You should use the `del` keyword to delete `copper['age']` before the `print()` call.
 
 ```js
-({ test: () => assert.match(code, /^del\s+copper\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
+({ test: () => assert.match(code, /^del\s+copper\s*\[\s*("|')age\1\s*\].*^print\s*\(\s*copper\s*\)/ms) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
index 6b5c1579424..7fd84134190 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/656874efd5102b81815c8ef7.md
@@ -24,7 +24,7 @@ Create an `__init__` method inside your `Board` class.
 Your method should be named `__init__`. Don't add any parameters.
 
 ```js
-assert.match(code, / +def\s+__init__\s*\(\)\:/);
+assert.match(code, / +def\s+__init__\s*\(\s*\)\:/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
index 93f0d5f4536..f5829fd8ea1 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568991b4d4874a4d5271337.md
@@ -43,7 +43,6 @@ class Board:
 --fcc-editable-region--
         for index, line in enumerate(self.board):
           row_list = []
-          
+
 --fcc-editable-region--
 ```
-
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
index 41e95f39a84..ecdce8eb003 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568994faf481da5d37bfa40.md
@@ -16,7 +16,7 @@ Use list slicing to create the three lists of equal length representing the `lin
 You should have `enumerate([line[:3], line[3:6], line[6:]], start=1)` within the inner `for` loop.
 
 ```js
-assert.match(code, /\[line\[:3\],\s*line\[3:6\],\s*line\[6:\]\]\s*,\s*start\s*=\s*1/);
+assert.match(code, /\[\s*line\s*\[\s*:3\s*\]\s*,\s*line\s*\[\s*3\s*:\s*6\s*\]\s*,\s*line\s*\[\s*6\s*:\s*\]\s*\]\s*,\s*start\s*=\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
index bd475022edb..07943e913e1 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568beebba98a3d1f26f6bf8.md
@@ -14,13 +14,13 @@ In the `try` block, attempt to find the index of the first occurrence of `0` in
 Use the index of the first occurrence of `0` in the current row using `contents.index(0)`.
 
 ```js
-assert.match(code, /contents\.index\(0\)/)
+assert.match(code, /contents\.index\(\s*0\s*\)/)
 ```
 
 You should have `col = contents.index(0)` within the `try` block.
 
 ```js
-assert.match(code, /col\s*=\s*contents\.index\(0\)/)
+assert.match(code, /col\s*=\s*contents\.index\(\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
index 563de4a8920..4a7bc419677 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c0013b3b62d7617518c7.md
@@ -16,7 +16,7 @@ You should check if the number(`num`) is not present in `self.board[row]`.
 You should have `num not in self.board[row]` within `valid_in_row`.
 
 ```js
-assert.match(code, /num\s+not\s+in\s+self\.board\[row\]/)
+assert.match(code, /num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
index 2667c41672f..2a785397b1f 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6568c024933423d85d5ed93c.md
@@ -21,7 +21,7 @@ You should have `return num not in self.board[row]` within `valid_in_row`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_row");
 const {function_body} = valid;
-assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\[row\]/);
+assert.match(function_body, /return\s+num\s+not\s+in\s+self\.board\s*\[\s*row\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
index b3c53c027a0..5fe90adbdc7 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d83fe4dcc614c2ff971d.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] != num` within `valid_in_col`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /self\.board\[row\]\[col\]\s*!=\s*num/);
+assert.match(function_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
index 87516ca9854..e7fec6c2991 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d8a4b8d85515cbb1ce72.md
@@ -28,7 +28,7 @@ You should have `all(self.board[row][col] != num for row in range(9))` within `v
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_col");
 const {function_body} = valid;
-assert.match(function_body, /all\s*\(\s*self\.board\[row\]\[col\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
+assert.match(function_body, /all\s*\(\s*self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*!=\s*num\s+for\s+row\s+in\s+range\s*\(\s*9\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
index 5ca4887b11c..8d9c209664b 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569d9dfd53db11b176d2963.md
@@ -21,7 +21,7 @@ You should assign the result of `(row // 3) * 3` to `row_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /row_start\s*=\s*\(row\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /row_start\s*=\s*\(\s*row\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
index ec281a82050..ddc5eec1c84 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569da02e7e2641be14ff922.md
@@ -21,7 +21,7 @@ You should assign the result of `(col // 3) * 3` to `col_start`.
 const tCode = code.replace(/\r/g, '');
 const valid = __helpers.python.getDef(tCode, "valid_in_square");
 const {function_body} = valid;
-assert.match(function_body, /col_start\s*=\s*\(col\s*\/\/\s*3\)\s*\*\s*3/);
+assert.match(function_body, /col_start\s*=\s*\(\s*col\s*\/\/\s*3\s*\)\s*\*\s*3/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
index 9b01c638305..b4a38094c01 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e41657a9923953aa7d3c.md
@@ -22,7 +22,7 @@ You should have `next_empty := self.find_empty_cell()` within the `solver` metho
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\)/);
+assert.match(function_body, /next_empty\s*:=\s*self\.find_empty_cell\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
index 2b0631d192e..73c3b5a9a4e 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569e481e67f123ad25c5d20.md
@@ -16,7 +16,7 @@ You should have `if (next_empty := self.find_empty_cell()) is None:` withing `so
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
-assert.match(function_body, /if\s*\(next_empty\s*:=\s*self\.find_empty_cell\(\)\)\s*is\s*None:/)
+assert.match(function_body, /if\s*\(\s*next_empty\s*:=\s*self\.find_empty_cell\(\s*\)\s*\)\s*is\s*None:/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
index 36e2ac7c0f8..69ae1f0fcfa 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f70a66ccdc42097ca051.md
@@ -7,7 +7,7 @@ dashedName: step-64
 
 # --description--
 
-If still there are empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive).
+If there are still empty cells, create a loop in the `else` block that iterates over numbers from `1` to `9` (inclusive). Your loop should use the variable named `guess`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have `for guess in range(1,10):` within the `else` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "else");
-assert.match(block_body, /for\s+\w+\s+in\s+range\(1,\s*10\)/);
+assert.match(block_body, /for\s+\w+\s+in\s+range\(\s*1,\s*10\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
index 75d11426c84..6dd60173f46 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569f7f2fa74c045e95676ac.md
@@ -17,7 +17,7 @@ You should have `self.board[row][col] = guess` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*guess/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*guess/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
index 0a27c653678..bcc098426ba 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa5b9d507748bf4ec722.md
@@ -17,7 +17,7 @@ You should have `self.solver()` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.solver\(\)/);
+assert.match(block_body, /self\.solver\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
index 42e1bfeeda1..c15fab412eb 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fa85d8f9ed49c8dfb37d.md
@@ -19,7 +19,7 @@ You should have `if self.solver():` within the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /if\s+self\.solver\(\):/);
+assert.match(block_body, /if\s+self\.solver\(\s*\):/);
 ```
 
 You should have `return True` within `if self.solver():`.
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
index 45131bca82e..e3bbe454f79 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fabbfe1c094ad838ec4c.md
@@ -19,7 +19,7 @@ You should have `self.board[row][col] = 0` outside the innermost `if` block.
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solver");
 const {block_body} = __helpers.python.getBlock(function_body, "if self.is_valid(next_empty, guess)");
-assert.match(block_body, /self\.board\[\s*row\s*\]\[\s*col\s*\]\s*=\s*0/);
+assert.match(block_body, /self\.board\s*\[\s*row\s*\]\s*\[\s*col\s*\]\s*=\s*0/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
index bfbbfef2a9a..d603e65cb9b 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fc63a404c8519d918095.md
@@ -18,7 +18,7 @@ You should have `gameboard = Board(board)` within the `solve_sudoku` function.
 ```js
 const tCode = code.replace(/\r/g, '');
 const {function_body} = __helpers.python.getDef(tCode, "solve_sudoku");
-assert.match(function_body, /gameboard\s*=\s*Board\(board\)/);
+assert.match(function_body, /gameboard\s*=\s*Board\(\s*board\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
index 037a9f3c68b..3d4efcdb7d7 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/6569fe0fe5b5425a1bb1f534.md
@@ -22,7 +22,7 @@ With this, you are finished with building the sudoku solver!
 Call the `solve_sudoku` method with `puzzle` as input.
 
 ```js
-assert.match(code, /solve_sudoku\(puzzle\)/);
+assert.match(code, /solve_sudoku\(\s*puzzle\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
index 9c094fe70c6..9c2be28433b 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656627b47bd2d2a4afbc945d.md
@@ -37,7 +37,7 @@ You should assign `array[:middle_point]` to the `left_part` variable.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /left_part\s*=\s*array\[:middle_point\]/);
+    assert.match(function_body, /left_part\s*=\s*array\s*\[\s*:\s*middle_point\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
index 5d45bb02730..824ea6c1b70 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656706afd65547d22bee0b68.md
@@ -22,7 +22,7 @@ You should replace `pass` keyword with an `if` statement with this condition: `l
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*pass/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
index d93f98e3abf..2c570406b6a 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656707e11e671ed54c96f7ec.md
@@ -24,7 +24,7 @@ You should replace `pass` with `array[sorted_index] = left_part[left_array_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*array\[sorted_index\]\s*=\s*left_part\[left_array_index\]\s*(?!.*\bpass\b)/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]\s*(?!.*\bpass\b)/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
index 85d6f5c81dc..c80ef2873d1 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656709e50ed928da35260276.md
@@ -24,7 +24,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /else:\s*[^}]*array\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /else:\s*[^}]*array\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
index 18f08b438f2..d45b50ce891 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/656710d1e0ec62253426db24.md
@@ -24,7 +24,7 @@ Your `while` loop should have this condition: `left_array_index < len(left_part)
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(left_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):/m);
   }
 })
 ```
@@ -38,7 +38,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
index 0bc9f665def..c52666077e8 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b0a63423f65dd30888df.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = left_part[left_array_index]` in the body
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ You should not have `pass` in the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*left_part\[left_array_index\]/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*left_part\s*\[\s*left_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
index 7b2d5d57f54..d2d9129b714 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b19d31a09b65b4bc390a.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `left_array_i
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bleft_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
index e64ffe8f993..aa7e38d3270 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b20f829b7e69d43c232a.md
@@ -22,7 +22,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(left_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
index df3e9e33f18..3cdfa08f90c 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b4e0bd29d17d4b53b16c.md
@@ -22,7 +22,7 @@ Your `while` loop should have this condition: `right_array_index < len(right_par
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(right_part\):/m);
+    assert.match(function_body, /^\s{4}while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):/m);
   }
 })
 ```
@@ -36,7 +36,7 @@ You should have the `pass` keyword in the body of your `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bpass\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bpass\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
index e57882ecff2..b2249ef0771 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b5c820a6a1859786e774.md
@@ -20,7 +20,7 @@ You should have `array[sorted_index] = right_part[right_array_index]` in the bod
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the `while` loop
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):(?:(?!\bpass\b)[^}])*\barray\[sorted_index\]\s*=\s*right_part\[right_array_index\]/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):(?:(?!\bpass\b)[^}])*\barray\s*\[\s*sorted_index\s*\]\s*=\s*right_part\s*\[\s*right_array_index\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
index 0cd3f33027d..d2ebff30b59 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b68fac723e8c20223ed3.md
@@ -20,7 +20,7 @@ You should have `right_array_index += 1` within the `while` loop.
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bright_array_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bright_array_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
index f38a66a2cdb..3be8d79a3e5 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b6be44940a8e2a469c31.md
@@ -20,7 +20,7 @@ You should use the `+=` operator to increment the current value of `sorted_index
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(right_part\):[^}]*\bsorted_index\s*\+=\s*1\b/);
+    assert.match(function_body, /while\s+right_array_index\s*<\s*len\(\s*right_part\s*\):[^}]*\bsorted_index\s*\+=\s*1\b/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
index fdfa315fad5..8bb4030b3db 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569b743630ee592a65a7e2f.md
@@ -24,7 +24,7 @@ You should create an `if` statement to check if `len(array) <= 1`. Don't forget
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*pass/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*pass/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
index f9d53398a09..d411e649c34 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6569bca4dd9feab7b295a5e1.md
@@ -20,7 +20,7 @@ You should replace `pass` with a `return` statement in the body of the `if` stat
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*return/);
   }
 })
 ```
@@ -34,7 +34,7 @@ There should be no `pass` keyword in the body of the `if` statement
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /if\s+len\(array\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
+    assert.match(function_body, /if\s+len\(\s*array\s*\)\s*<=\s*1:\s*(?!.*\bpass\b).*return/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
index 20bbc90ad52..2df795e6b46 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/6577562501feabdf0984a184.md
@@ -21,8 +21,8 @@ You should add `1` to the current value of `left_array_index`.
     const { function_body } = merge_sort;
 
     const allowedMatches = [
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
-      /while\s+left_array_index\s*<\s*len\(left_part\)\s+and\s+right_array_index\s*<\s*len\(right_part\):\s*[^}]*if\s+left_part\[left_array_index\]\s*<\s*right_part\[right_array_index\]:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*\+=\s*1\s*(?!.*\bpass\b)/,
+      /while\s+left_array_index\s*<\s*len\(\s*left_part\s*\)\s+and\s+right_array_index\s*<\s*len\(\s*right_part\s*\):\s*[^}]*if\s+left_part\s*\[\s*left_array_index\s*\]\s*<\s*right_part\s*\[\s*right_array_index\s*\]\s*:\s*[^}]*left_array_index\s*=\s*left_array_index\s*\+\s*1\s*(?!.*\bpass\b)/
     ]
 
     const anyMatch = allowedMatches.some((match) => match.test(function_body));
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
index 7c360c9cbc0..4a1bdc66b5c 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-data-structures-by-building-the-merge-sort-algorithm/657f3a661730891aa64f3568.md
@@ -34,7 +34,7 @@ You should assign `array[middle_point:]` to the `right_part` variable
     const merge_sort = __helpers.python.getDef("\n" + transformedCode, "merge_sort");
     const { function_body } = merge_sort;
 
-    assert.match(function_body, /right_part\s*=\s*array\[middle_point:\]/);
+    assert.match(function_body, /right_part\s*=\s*array\s*\[\s*middle_point\s*:\s*\]/);
   }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
index f54571926b7..324c1ea688f 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656877c202f44995ed952608.md
@@ -7,11 +7,11 @@ dashedName: step-2
 
 # --description--
 
-Replace the `pass` statement with a variable named `card_number` and a value of `4111-1111-4555-1142`.
+Replace the `pass` statement with a variable named `card_number` and a value of `'4111-1111-4555-1142'`.
 
 # --hints--
 
-You should have `card_number = "4111-1111-4555-1142"` within the `main` function.
+You should have `card_number = '4111-1111-4555-1142'` within the `main` function.
 
 ```js
 ({
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
index 7fba10b8f2c..b3f514bab47 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879a66338b2a461d5d307.md
@@ -13,7 +13,7 @@ The Luhn algorithm is as follows:
 
 1. From the right to left, double the value of every second digit; if the product is greater than 9, sum the digits of the products.
 2. Take the sum of all the digits.
-3. If the sum of all the digits is a multiple of `10`, then the number is valid; else it is not valid.
+3. If the sum of all the digits is a multiple of 10, then the number is valid; else it is not valid.
 
 Assume an example of an account number "7992739871" that will have a check digit added, making it of the form 7992739871x:
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
index e5cae734509..3f240cb7587 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656879c6f35a85a59c06b3a7.md
@@ -30,7 +30,7 @@ You should have `card_number_reversed = card_number[0:4]` within the `verify_car
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
index f4fc8c49ed0..a8ab6f80307 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687a8253766cac4c99c57f.md
@@ -20,7 +20,7 @@ You should have `odd_digits = card_number_reversed[::2]` within the `verify_card
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\[::2\]/);
+        assert.match(function_body, /odd_digits\s*=\s*card_number_reversed\s*\[\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
index d0b05864142..790075b4516 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b48f2201ab32e06c37c.md
@@ -27,7 +27,7 @@ You should have `sum_of_odd_digits += int(digit)` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(digit\)/);
+        assert.match(function_body, /sum_of_odd_digits\s*\+=\s*int\(\s*digit\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
index 79950e42dec..e8867112574 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687b8eb0bbf7b5d41b610b.md
@@ -20,7 +20,7 @@ You should have `even_digits = card_number_reversed[1::2]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\[1::2\]/);
+        assert.match(function_body, /even_digits\s*=\s*card_number_reversed\s*\[\s*1\s*:\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
index fbddb137895..a6df854d930 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687c8d86e18cbd775a53c9.md
@@ -22,7 +22,7 @@ You should have `number = int(digit) * 2` within the `for` loop.
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /number\s*=\s*int\(digit\)\s*\*\s*2/);
+        assert.match(function_body, /number\s*=\s*int\(\s*digit\s*\)\s*\*\s*2/);
     }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
index e7a6a926a8d..6d0ce52ffaa 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687db6a9fcf3c548a6c1b7.md
@@ -30,8 +30,8 @@ You should have `number = number // 10 + number % 10` within the `if` statement.
         const verify_card_number = __helpers.python.getBlock("\n" + transformedCode, "if number >= 10");
         const { block_body } = verify_card_number;
         const allowedMatches = [
-            /number *= *\(?number *\/\/ *10\)? *\+ *\(?number *% *10/,
-            /number *= *\(?number *% *10\)? *\+ *\(?number *\/\/ *10/
+            /number *= *\(?\s*number *\/\/ *10\s*\)? *\+ *\(?\s*number *% *10/,
+            /number *= *\(?\s*number *% *10\s*\)? *\+ *\(?\s*number *\/\/ *10/
         ];
 
         const someMatch = allowedMatches.some(allowedMatch => allowedMatch.test(block_body));
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
index d4b8e12b4c9..3419964a99b 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687e457ab1c4cb8c3fe7c8.md
@@ -7,7 +7,7 @@ dashedName: step-33
 
 # --description--
 
-Adjust the `verify_card_number` call such that if it returns `True`, print `VALID!` to the console. Otherwise, print `INVALID!`.
+Adjust the `verify_card_number` call such that if it returns `True`, print `'VALID!'` to the console. Otherwise, print `'INVALID!'`.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `if verify_card_number(translated_card_number):` within the `mai
 })
 ```
 
-You should have `print("VALID!")` within the `if` statement.
+You should have `print('VALID!')` within the `if` statement.
 
 ```js
 ({
@@ -40,7 +40,7 @@ You should have `print("VALID!")` within the `if` statement.
 })
 ```
 
-You should have `print("INVALID!")` within the `else` clause.
+You should have `print('INVALID!')` within the `else` clause.
 
 ```js
 ({
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
index 3b853aff1a9..aaae68cf5e9 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/65687f47f9001dd35bdcd5ab.md
@@ -7,7 +7,7 @@ dashedName: step-34
 
 # --description--
 
-Change the value of `card_number` such that `INVALID!` is printed to the console.
+Change the value of `card_number` such that `'INVALID!'` is printed to the console.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
index bfcde359cea..d23ef6c4712 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b475b394390334828eb12.md
@@ -20,7 +20,7 @@ You should have `card_number_reversed = card_number[0:4:2]` within the `verify_c
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[0:4:2\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*0\s*:\s*4\s*:\s*2\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
index 6c3367f79db..1db47a293b2 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-how-to-work-with-numbers-and-strings-by-implementing-the-luhn-algorithm/656b481ec4976439565a78b2.md
@@ -27,7 +27,7 @@ You should have `card_number_reversed = card_number[::-1]` within the `verify_ca
         const verify_card_number = __helpers.python.getDef("\n" + transformedCode, "verify_card_number");
         const { function_body } = verify_card_number;
 
-        assert.match(function_body, /card_number_reversed\s*=\s*card_number\[::-1\]/);
+        assert.match(function_body, /card_number_reversed\s*=\s*card_number\s*\[\s*:\s*:\s*-1\s*\]/);
     }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
index d7aab5b3d3a..73a865105ec 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822308ded1ba4632f66aa3.md
@@ -10,10 +10,10 @@ dashedName: step-4
 A dictionary is another built-in data type in Python. A dictionary is a collection of data in the form of *key*-*value* pairs. Dictionaries are defined with curly braces `{}` and they contain key-value pairs separated by commas. Each key is followed by a colon `:` and the value:
 
 ```py
-{"amount": 50.0, "category": "Food"}
+{'amount': 50.0, 'category': 'Food'}
 ```
 
-In the example above, `amount` and `category` are keys, and `50.0` and `Food` are their the corresponding values.
+In the example above, `amount` and `category` are keys, and `50.0` and `'Food'` are their the corresponding values.
 
 Create a dictionary with a key `amount` and value of the `amount` parameter and pass your new dictionary to the `.append()` call.
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
index 07f21ecefcc..510a44b67ab 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658225d560369446ece5518b.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `category` as the key, and the `category` parameter as the value.
+Add another key-value pair to the dictionary you are appending to the `expense` list. Use the string `'category'` as the key, and the `category` parameter as the value.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
index f2363015596..7f9f383b8cb 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65822bd82d708c4895080c35.md
@@ -10,11 +10,11 @@ dashedName: step-9
 You can access values in a dictionary through its keys. You need to use the bracket notation and include the key between the square brackets:
 
 ```py
-my_dict = {"amount": 50.0, "category": "Food"}
-my_dict["amount"] # 50.0
+my_dict = {'amount': 50.0, 'category': 'Food'}
+my_dict['amount'] # 50.0
 ```
 
-You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `amount` key and the `category` key in the `expense` dictionary.
+You are currently interpolating the `expense` dictionary in your f-string. Modify the f-string expression to access the value of the `'amount'` key and the `'category'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
index d42d982f740..3c898f8b834 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582324b5d37fe4b622bc3c0.md
@@ -13,7 +13,7 @@ Lambda functions are brief, anonymous functions in Python, ideal for simple, one
 lambda x: expr
 ```
 
-In the example above, `x` is a parameter to be use in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
+In the example above, `x` is a parameter to be used in the expression `expr`. Create a `test` variable and assign it a lambda function that takes an `x` parameter and returns `x * 2`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
index 3248ac6d2dd..1f60af6d072 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823bbbdb4eaa4f9d20a0fb.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `amount` key in the `expense` dictionary.
+Within your `total_expenses` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the value of the `'amount'` key in the `expense` dictionary.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
index 6dc2a502182..758894d8784 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65823ff0d4b991510fade1a8.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `category` key of the `expense` dictionary and `category`.
+Within the `filter_expenses_by_category` function, replace `pass` with a `lambda` function. Use `expense` as the parameter and return the comparison between the value of the `'category'` key of the `expense` dictionary and `category`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
index a213d1a0be6..30877e21776 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824561f3478e5371a33ae5.md
@@ -23,7 +23,7 @@ You should define a function named `main()` without parameters.
 })
 ```
 
-You should move the `expense` list inside the `main()` function body.
+You should move the `expenses` list inside the `main()` function body.
 
 ```js
 ({ test: () => assert(__pyodide.runPython(`
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
index cb3def01207..2b206e5bfde 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658246c28575d653d1f89b59.md
@@ -14,7 +14,7 @@ while condition:
     <code>
 ```
 
-Below the `expense` list, create a `while` loop. Use `True` for the condition, and print the string `\nExpense Tracker` inside the loop body to show the title of the program.
+Below the `expenses` list, create a `while` loop. Use `True` for the condition, and print the string `'\nExpense Tracker'` inside the loop body to show the title of the program.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
index 45a758df797..3cca2e39ba9 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824872894f59546e3084e2.md
@@ -9,7 +9,7 @@ dashedName: step-25
 
 The `while` loop you created in the previous step is an infinite loop that will allow the program to continuously present menu options until the user decides to exit.
 
-After the `print()` call, add another one to print the string `1. Add an expense`.
+After the `print()` call, add another one to print the string `'1. Add an expense'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
index 1046f822389..29575b7375a 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824a1b16631c54fa524154.md
@@ -7,7 +7,7 @@ dashedName: step-26
 
 # --description--
 
-Next, add another `print()` call and pass the string `2. List all expenses`.
+Next, add another `print()` call and pass the string `'2. List all expenses'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
index f3675255751..6b2bc6ffaee 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824c7b4e2da85597693dcf.md
@@ -7,7 +7,7 @@ dashedName: step-27
 
 # --description--
 
-Provide the other menu options by printing the following three strings in your `while` loop: `3. Show total expenses`, `4. Filter expenses by category`, and `5. Exit`.
+Provide the other menu options by printing the following three strings in your `while` loop: `'3. Show total expenses'`, `'4. Filter expenses by category'`, and `'5. Exit'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
index 77c538c3285..32fe6ab7e0b 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65824dfdb6815d563b2d3256.md
@@ -9,7 +9,7 @@ dashedName: step-28
 
 The `input()` function takes a user input and it returns the user input in the form of a string.
 
-Inside your `while` loop, call the `input()` function passing the string `Enter your choice:` as the argument, and assign the result to a variable named `choice`.
+Inside your `while` loop, call the `input()` function passing the string `'Enter your choice: '` as the argument, and assign the result to a variable named `choice`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
index b18c48cd057..0940266004e 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582507654b3ed5712341382.md
@@ -7,9 +7,9 @@ dashedName: step-29
 
 # --description--
 
-You are going to use conditional statements to check the user's choice. If the choice is `1`, it means the user wants to add an expense.
+You are going to use conditional statements to check the user's choice. If the choice is `'1'`, it means the user wants to add an expense.
 
-Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `1`. If it's true, it will be the starting point for adding a new expense.
+Still in the `while` loop, under the `choice` variable, write an `if` statement to check if `choice` equals the string `'1'`. If it's true, it will be the starting point for adding a new expense.
 
 Inside the `if` statement body, declare a variable `amount` and assign it an empty `input()` call.
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
index 24dba56e0da..9d4e60a3c63 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658252f6b1526d57b103d48a.md
@@ -9,7 +9,7 @@ dashedName: step-30
 
 Inside the `if` statement, you should ask the user to enter the amount for the expense and store it in a variable.
 
-Pass the string `Enter amount:` to your empty `input()` call, so you can store the expense.
+Pass the string `'Enter amount: '` to your empty `input()` call, so you can store the expense.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
index 990f5c288c3..0511583a76a 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/658258c0e5fbe85c14c060cf.md
@@ -9,7 +9,7 @@ dashedName: step-34
 
 To list all expenses, you can use an `elif` statement after an `if` statement. The `elif` checks additional conditions and only works following an `if` statement.
 
-Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `\nAll Expenses:`.
+Create an `elif` statement to check if the user's choice equals the string `2`. Inside the `elif` statement, print the string `'\nAll Expenses:'`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
index 0788712f6f0..77331e9840b 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/65825b758fe85a5cebabc8c5.md
@@ -9,7 +9,7 @@ dashedName: step-36
 
 To show the total expenses, create an `elif` statement that checks if `choice == '3'`.
 
-If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `\nTotal Expenses:` as the first argument and `total_expenses(expenses)` as the second argument.
+If it's true, it means the user wants to see the total expenses. So call `print()` and pass the string `'\nTotal Expenses: '` as the first argument and `total_expenses(expenses)` as the second argument.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
index 08424ffb2e0..a7dc82d4f78 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-lambda-functions-by-building-an-expense-tracker/6582687859366a618424d84b.md
@@ -7,9 +7,9 @@ dashedName: step-41
 
 # --description--
 
-To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `5`.
+To provide a way to exit the program, use another `elif` statement to check if `choice` equals the string `'5'`.
 
-Inside the new `elif` statement, print the string `Exiting the program.` to show that the program is terminating its execution.
+Inside the new `elif` statement, print the string `'Exiting the program.'` to show that the program is terminating its execution.
 
 # --hints--
 
@@ -26,7 +26,7 @@ You should have `elif choice == '5':` in your code.
 })
 ```
 
-You should print `Exiting the program.` in your new `elif` statement.
+You should print `'Exiting the program.'` in your new `elif` statement.
 
 ```js
 ({ test: () =>
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
index daf8861a4e4..0393e9bf5c8 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657ed53c19461d4b95c4757a.md
@@ -22,7 +22,7 @@ You should replace `pass` with an empty list named `snake_cased_char_list` withi
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\]/);
+        assert.match(function_body, / +snake_cased_char_list\s*=\s*\[\s*\]\s*/);
     }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
index 71ba82df725..ee8ba7cfb04 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657efdcf7fe23b76c0cff9ec.md
@@ -34,7 +34,7 @@ You should use the `.append()` method to add `char` to the `snake_cased_char_lis
         const convert_to_snake_case = __helpers.python.getDef("\n" + transformedCode, "convert_to_snake_case");
         const { function_body } = convert_to_snake_case;
 
-        assert.match(function_body, / +snake_cased_char_list.append\(char\)/);
+        assert.match(function_body, / +snake_cased_char_list.append\(\s*char\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
index 0c900c7d408..588f42adcde 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f0353c9523d7d896873ea.md
@@ -7,11 +7,11 @@ dashedName: step-12
 
 # --description--
 
-Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `aLongAndComplexString` as input to the function and print out the output using the `print()` function.
+Inside the `main()` function, replace `pass` with a  `convert_to_snake_case()` call. Pass the string `'aLongAndComplexString'` as input to the function and print out the output using the `print()` function.
 
 # --hints--
 
-You should call `convert_to_snake_case()` inside the `main()` function and pass `aLongAndComplexString` as input to the function.
+You should call `convert_to_snake_case()` inside the `main()` function and pass `'aLongAndComplexString'` as input to the function.
 
 ```js
 ({
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
index 856943df153..a9e90e0fe46 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-list-comprehension-by-building-a-case-converter-program/657f4add33ea4b1f61ba3dc8.md
@@ -7,7 +7,7 @@ dashedName: step-22
 
 # --description--
 
-Finally try out this new implementation by executing the program. Change the input string to `IAmAPascalCasedString` and see if it comes out as `i_am_a_pascal_cased_string`, even though that's a lie.
+Finally try out this new implementation by executing the program. Change the input string to `'IAmAPascalCasedString'` and see if it comes out as `'i_am_a_pascal_cased_string'`, even though that's a lie.
 
 If you've done everything correctly, you should see the input string converted into snake case, like before.
 
@@ -15,7 +15,7 @@ If you've done everything correctly, you should see the input string converted i
 
 # --hints--
 
-You should change the input string from `aLongAndComplexString` to `IAmAPascalCasedString` inside the `main()` function.
+You should change the input string from `'aLongAndComplexString'` to `'IAmAPascalCasedString'` inside the `main()` function.
 
 ```js
 ({
@@ -24,7 +24,7 @@ You should change the input string from `aLongAndComplexString` to `IAmAPascalCa
         const main = __helpers.python.getDef("\n" + transformedCode, "main");
         const { function_body } = main;
 
-        assert.match(function_body, / +print\(convert_to_snake_case\('IAmAPascalCasedString'\)\)/);
+        assert.match(function_body, / +print\(\s*convert_to_snake_case\(\s*'IAmAPascalCasedString'\s*\)\s*\)/);
     }
 })
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
index 857f79329f6..2475f1a5069 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc8ea01436383a88256d7f.md
@@ -7,9 +7,9 @@ dashedName: step-3
 
 # --description--
 
-The puzzle starts with the disks piled up on the first rod, in decreasing size. You need to populate your first list with numbers representing the various disk sizes.
+The puzzle starts with the disks piled up on the first rod, in decreasing size, with the smallest disk on top and the largest disk on the bottom. You need to populate your first list with numbers representing the various disk sizes.
 
-Instead of adding the items manually to the first list, generate a sequence of numbers from `3` to `1` by using the `range()` function and assign it to `rods['A']`.
+Instead of adding the items manually to the first list, generate a sequence of numbers counting down from `3` to `1` by using the `range()` function and assign it to `rods['A']`. Here, `3` represents the largest disk at the bottom of the pile and `1` represents the smallest disk at the top of the pile.
 
 The syntax is `range(x, y, h)`, where `x` is the starting integer (inclusive), `y` is the last integer (not inclusive), and `h` is the difference between a number and the next one in the sequence.
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
index cd3d851a1e7..1945a313dca 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc9004f658183afa85f4f1.md
@@ -14,13 +14,13 @@ Now check the data type of your `'A'` key by passing it to the `type()` function
 You should pass your `'A'` key to the `type()` function.
 
 ```js
-({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)/) })
+({ test: () => assert.match(code, /type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)/) })
 ```
 
 You should print the type of `rods['A']` using the `print()` function.
 
 ```js
-({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\)\s*\)/) })
+({ test: () => assert.match(code, /print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")\s*A\s*\1\s*\]\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
index 91c96bf713a..1abfd9519cc 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc90e837670a3ba26a1e61.md
@@ -14,7 +14,7 @@ Now that the type is `list` as required, you can remove the `print()` call.
 You should remove `print(type(rods['A']))` from your code.
 
 ```js
-({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
+({ test: () => assert.match(code, /\}(?!\s+print\s*\(\s*type\s*\(\s*rods\s*\[\s*('|")A\1\s*\]\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
index f7ac238a566..36ed0109274 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dc97ab25730b3e9de86ea5.md
@@ -9,7 +9,7 @@ dashedName: step-16
 
 At the end of this project, you will create a recursive solution to the Tower of Hanoi puzzle, but now you are going to explore an iterative approach to this problem.
 
-Start by adding a `for` loop to your function that iterates through the number of moves and prints the current iteration number.
+Start by adding a `for` loop to your function that iterates through the `number_of_moves` and prints the current iteration number.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
index 81af466a6ef..ab97d4ec512 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd3d61c448e2676501f43.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `A` and `B` (the source and the auxiliary rods).
+When the remainder of the move number divided by 3 is equal to 2, the movement is allowed between `'A'` and `'B'` (the source and the auxiliary rods).
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
index f6d6d7e37cd..df19d8d90dc 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dcd9bbc2268127e7898d77.md
@@ -7,7 +7,7 @@ dashedName: step-21
 
 # --description--
 
-Finally, when the move number divided by 3 has no remainder, the movement is allowed between `B` and `C`.
+Finally, when the move number divided by 3 has no remainder, the movement is allowed between `'B'` and `'C'`.
 
 Add an `elif` statement for that. Then, print the appropriate string if the condition is met.
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
index 6d97da81775..190e44b1e53 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dce7ee2494e82bf4205a3f.md
@@ -18,10 +18,10 @@ You should have an `elif` statement to check if `rods[source]` is not empty and
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:`);
 assert.match(code, re);
 ```
 
@@ -30,10 +30,10 @@ You should set `forward` to `True` inside your new `elif` statement. You should
 ```js
 const allowedRes = [
     "rods\\s*\\[\\s*source\\s*\\]",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>\\s*0",
-    "len\\(rods\\s*\\[\\s*source\\s*\\]\\)\\s*>=\\s*1",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>\\s*0",
+    "len\\(rods\\s*\\[\\s*source\\s*\\]\\s*\\)\\s*>=\\s*1",
 ];
-const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
+const re = new RegExp(`elif\\s+((${allowedRes.join(")|(")}))\\s+and\\s+(rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*<\\s*rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]|rods\\s*\\[\\s*target\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\]\\s*>\\s*rods\\s*\\[\\s*source\\s*\\]\\s*\\[\\s*-\\s*1\\s*\\])\\s*:\\s+forward\\s*=\\s*True`);
 assert.match(code, re);
 ```
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
index b8b9546aadf..cf9786b52ee 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64dceadec3c9cf2ca7b56de6.md
@@ -20,7 +20,7 @@ You should add an `if` statement to execute when `forward` is `True` after the `
 You should print the provide string inside your new `if` statement.
 
 ```js
-({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
+({ test: () => assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}\2\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
index e6589376ba2..6abf4aa9b1e 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddcc2ee182e0164c3539f8.md
@@ -14,13 +14,13 @@ After printing the move, you need to remove the last element from the source rod
 You should remove the last element from `rods[source]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[target].append(rods[source].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
index 2bbda3e401f..ff5353e1823 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddce6f6e8066173208235b.md
@@ -14,25 +14,25 @@ When `forward` is `False`, the disk has to be moved in the opposite direction. W
 You should have an `else` clause to move the disks in the opposite direction.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*source\s*\]\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*source\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+else\s*:/) })
 ```
 
 You should have `print(f'Moving disk {rods[target][-1]} from {target} to {source}')` inside your `else` clause.
 
 ```js
-({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
+({ test: () => assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}\1\s*\)/) })
 ```
 
 You should remove the last element from `rods[target]`.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*target\s*\]\.pop\s*\(\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)/) })
 ```
 
 You should have `rods[source].append(rods[target].pop())` in your code.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
index 77ba3efe01b..e72bde49ab4 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd02838f36117cd9738eb.md
@@ -14,13 +14,13 @@ Outside the `else` block, add a comment saying `display our progress` and print
 You should use the provided text to add a comment outside the `else` block.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress/) })
 ```
 
 You should print the `rods` object outside the `else` block, after the comment.
 
 ```js
-({ test: () => assert.match(code, /rods\[\s*source\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
+({ test: () => assert.match(code, /rods\s*\[\s*source\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\s*\(\s*rods\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
index 6cb872a97e6..04991cef672 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64ddd65848a12919d7e1c7d0.md
@@ -15,7 +15,7 @@ You should move the code nested inside the first `if` statement (except the firs
 
 ```js
 ({ test: () => {
-  assert.match(code, /def\s+make_allowed_move\(rod1, rod2\):\s+forward\s+=\s+False\s+if\s+not\s+rods\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\[\s*source\s*\]\s+and\s+rods\[\s*source\s*\]\[-1\]\s<\srods\[\s*target\s*\]\[\s*-\s*1\s*\]:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*source\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\[\s*source\s*\].append\(\s*rods\[\s*target\s*\].pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+\print\(\s*rods\s*\)/);
+  assert.match(code, /def\s+make_allowed_move\(\s*rod1, rod2\s*\):\s+forward\s+=\s+False\s+if\s+not\s+rods\s*\[\s*target\s*\]\s*:\s+forward\s*=\s*True\s+elif\s+rods\s*\[\s*source\s*\]\s+and\s+rods\s*\[\s*source\s*\]\s*\[\s*-1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:\s+forward\s*=\s*True\s+if\s+forward\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*source\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*source\s*\}\sto\s\{\s*target\s*\}'\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)\s+else\s*:\s+print\(\s*f'Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*source\s*\}'\s*\)\s+rods\s*\[\s*source\s*\]\s*\.append\(\s*rods\s*\[\s*target\s*\]\s*\.pop\(\s*\)\s*\)\s+#\s*display\sour\sprogress\s+print\(\s*rods\s*\)/);
   }
 })
 ```
@@ -47,7 +47,7 @@ def move(n, source, auxiliary, target):
             if not rods[target]:
                 forward = True
             elif rods[source] and rods[source][-1] < rods[target][-1]:
-                forward = True              
+                forward = True
             if forward:
                 print(f'Moving disk {rods[source][-1]} from {source} to {target}')
                 rods[target].append(rods[source].pop())
@@ -57,7 +57,7 @@ def move(n, source, auxiliary, target):
 
             # display our progress
             print(rods)
---fcc-editable-region--            
+--fcc-editable-region--
         elif remainder == 2:
             print(f'Move {i + 1} allowed between {source} and {auxiliary}')
         elif remainder == 0:
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
index 730409803dd..46d7bef7fff 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de6c8a5305d8173a3a9e09.md
@@ -15,11 +15,11 @@ You should change each occurrence of `source` inside the `make_allowed_move()` f
 
 ```js
 ({ test: () => {
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\[\s*target\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*target\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*target\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*target\s*\}\2\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*target\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*target\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*target\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
index 7b5cf301ba5..65e6a425afa 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de7357cc75bd18bdced920.md
@@ -16,11 +16,11 @@ You should change each occurrence of `target` inside `make_allowed_move` into `r
 ```js
 ({ test: () => {
   assert.match(code, /if\s+not\s+rods\s*\[\s*rod2\s*\]\s*:/);
-  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*:/);
-  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod1\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\[\s*rod2\s*\]\.append\s*\(\s*rods\[\s*rod1\s*\]\.pop\s*\(\s*\)\s*\)/);
-  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\[\s*rod2\s*\]\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
-  assert.match(code, /rods\[\s*rod1\s*\]\.append\s*\(\s*rods\[\s*rod2\s*\]\.pop\s*\(\s*\)\s*\)/);
-  } 
+  assert.match(code, /elif\s+rods\s*\[\s*rod1\s*\]\s+and\s+rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*<\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*:/);
+  assert.match(code, /if\s+forward(\s*==\s*True)?\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod1\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod1\s*\}\sto\s\{\s*rod2\s*\}\2\s*\)\s+rods\s*\[\s*rod2\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod1\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  assert.match(code, /else\s*:\s+print\s*\(\s*f('|")Moving\sdisk\s\{\s*rods\s*\[\s*rod2\s*\]\s*\[\s*-\s*1\s*\]\s*\}\sfrom\s\{\s*rod2\s*\}\sto\s\{\s*rod1\s*\}\1\s*\)/);
+  assert.match(code, /rods\s*\[\s*rod1\s*\]\s*\.append\s*\(\s*rods\s*\[\s*rod2\s*\]\s*\.pop\s*\(\s*\)\s*\)/);
+  }
 })
 ```
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
index c95470bb0d4..1db920c38cf 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64de773f81facd14653f49c8.md
@@ -11,7 +11,7 @@ It looks like it's working! But the output is not very readable. Print a new lin
 
 # --hints--
 
-You should pass a string with a new line character (`\n`) as the second argument for your two `print(rods)` calls.
+You should pass a string with a new line character (`'\n'`) as the second argument for your two `print(rods)` calls.
 
 ```js
 ({ test: () => assert.match(code, /print\(\s*rods\s*,\s*('|")\\n\1\s*\)(?=.*print\(\s*rods\s*,\s*('|")\\n\2\s*\))/s) })
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
index 164aaea6c0b..53d1bd43634 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64df45a3ad4f8719e5355244.md
@@ -16,7 +16,7 @@ For now, each recursive call prints the `rods` dictionary without performing any
 You should remove the last element from the `rods[source]` list and append it to the `rods[target]` list before the `print` call.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\)/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
index af9012a663b..cc484dcee01 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e3392996b41d17a1375643.md
@@ -14,7 +14,7 @@ Before appending the last element to the target, add a comment saying `move the
 You should add a comment with the provided text before `rods[target].append(rods[source].pop())`.
 
 ```js
-({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\[\s*target\s*\]\.append\(\s*rods\[\s*source\s*\]\.pop\(\s*\)\s*\))/) })
+({ test: () => assert.match(code, /move\(\s*n\s*-\s*1\s*,\s*source\s*,\s*auxiliary\s*,\s*target\s*\)\s+#\s*move\sthe\snth\sdisk\sfrom\ssource\sto\starget\s+(?=rods\s*\[\s*target\s*\]\s*\.append\(\s*rods\s*\[\s*source\s*\]\s*\.pop\(\s*\)\s*\))/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
index 75f7606b88b..76986a8e3da 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-recursion-by-solving-the-tower-of-hanoi-puzzle/64e34146860065146733883b.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-Although recursion could sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
+Although recursion can sometimes be less easy to understand, it gives you the power to create more concise code. In this case, you don't even need to differentiate between even and odd numbers of disks.
 
 Set `NUMBER_OF_DISKS` to `5` and check the output.
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
index 950b0a88e90..857ca1ca1be 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6564f0279e23ce924eedd1b2.md
@@ -21,7 +21,7 @@ You should delete the last three lines in your code.
 ({ test: () => {
   assert.isFalse(/pattern\s*=\s*r("|')\\W\1/.test(code));
   assert.isFalse(/quote\s*=\s*("|')_\1/.test(code));
-  assert.isFalse(/print\(re\.findall\(pattern, quote\)\)/.test(code));
+  assert.isFalse(/print\(\s*re\.findall\(\s*pattern, quote\s*\)\s*\)/.test(code));
 }})
 ```
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
index 6d14bc6459d..6d1e251e974 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/656f10458134d4c4e283a2f1.md
@@ -14,7 +14,7 @@ Now, turn the empty string in the constraint tuple into a regex pattern to match
 You should have the `(nums, '[0123456789]')` tuple in your `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
+({ test: () => assert.match(code, /constraints\s*=\s*\[\s*\s*\(\s*nums\s*,\s*("|')\[\d{10}\]\1\s*\)\s*\]/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
index 6940434be5c..3a3d14473e6 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-regular-expressions-by-building-a-password-generator/6577319039f4f7de9251b822.md
@@ -27,7 +27,7 @@ You should replace your existing `for` loop and two `if` statements with a singl
 Your new `if` condition should be a list comprehension that is the result of evaluating the expression `constraint <= len(re.findall(pattern, password))` for each `constraint`-`pattern` tuple in the `constraints` list.
 
 ```js
-({ test: () => assert.match(code, /^(\s{8})if\s+\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
+({ test: () => assert.match(code, /^(\s{8})if\s*\[\s*constraint\s*<=\s*len\s*\(\s*re\.findall\s*\(\s*pattern\s*,\s*password\s*\)\s*\)\s+for\s+constraint\s*,\s*pattern\s+in\s+constraints\s*\]\s*:\s*^\1\s{4}break/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
index 2e6d119b78b..17ed2203092 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551eebe6cbb2e6cadf9b468.md
@@ -1,6 +1,6 @@
 ---
 id: 6551eebe6cbb2e6cadf9b468
-title: Step 2
+title: Крок 2
 challengeType: 20
 dashedName: step-2
 ---
@@ -15,7 +15,7 @@ string_2 = 'I am also a string'
 string_3 = 'This is not valid"
 ```
 
-Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `Hello World` to this variable.
+Delete your `number` variable and its value. Then, declare another variable called `text` and assign the string `'Hello World'` to this variable.
 
 # --hints--
 
@@ -32,7 +32,7 @@ You should declare a variable called `text`. Pay attention to place the variable
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello World` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
+You should assign the string `'Hello World'` to your `text` variable. Remember to use either single or double quotes to enclose the string and pay attention to the letter case.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello World\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
index d40877ed6af..2b65b4b4212 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551ef504d91936d2d4e54f8.md
@@ -14,7 +14,7 @@ greet = 'Hello!'
 print(greet)
 ```
 
-The code in the example above would print the string `Hello!`, which is the value of the variable `greet` passed to `print()` as the argument.
+The code in the example above would print the string `'Hello!'`, which is the value of the variable `greet` passed to `print()` as the argument.
 
 Print your `text` variable to the screen by passing the `text` variable as the argument to the `print()` function.
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
index 86104aff4f6..beb0aff0fa1 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f3bfed58796ebb1268dc.md
@@ -7,7 +7,7 @@ dashedName: step-5
 
 # --description--
 
-Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `Hello World`, `H` is at index `0`, `e` is at index `1`, and so on. 
+Each string character can be referenced by a numerical index. The index count starts at zero. So the first character of a string has an index of `0`. For example, in the string `'Hello World'`, `'H'` is at index `0`, `'e'` is at index `1`, and so on.
 
 Each character of a string can be accessed by using bracket notation. You need to write the variable name followed by square brackets and add the index of the character between the brackets:
 
@@ -20,7 +20,7 @@ Now, instead of printing `text`, print just the character at index `6`.
 
 # --hints--
 
-You should still call the `print()` function.
+Ви все одно повинні викликати функцію `print()`.
 
 ```js
 assert.match(code, /print\s*\(.*\)/)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
index 5d0ae1dd2fa..3103cb653bf 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551f6f9ec6db270eb83f3db.md
@@ -7,7 +7,7 @@ dashedName: step-8
 
 # --description--
 
-You can see `11` printed on the terminal because `Hello World` contains 11 characters.
+You can see `11` printed on the terminal because `'Hello World'` contains 11 characters.
 
 Another useful built-in function is `type()`, which returns the data type of a variable. Modify your `print()` call to print the data type of `text`.
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
index cedb112a823..074c15b2e19 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6551fe3b1df7c9740f13f270.md
@@ -14,7 +14,7 @@ Key aspects of variable naming in Python are:
 - Variable names are case sensitive, i.e. `my_var` is different from `my_Var` and `MY_VAR`.
 - Finally, it is a common convention to write variable names using `snake_case`, where each space is replaced by an underscore character and the words are written in lowercase letters.
 
-Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `abcdefghijklmnopqrstuvwxyz` to this variable.
+Remove both calls to `print()` and declare another variable called `alphabet`. Assign the string `'abcdefghijklmnopqrstuvwxyz'` to this variable.
 
 # --hints--
 
@@ -38,7 +38,7 @@ You should declare a variable called `alphabet`. Pay attention to place the vari
 assert.match(code, /^alphabet\s*=/m)
 ```
 
-You should assign the string `abcdefghijklmnopqrstuvwxyz` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
+You should assign the string `'abcdefghijklmnopqrstuvwxyz'` to your `alphabet` variable. Remember to use either single or double quotes to enclose the string.
 
 ```js
 assert.match(code, /^alphabet\s*=\s*("|')abcdefghijklmnopqrstuvwxyz\1\s*(#.*)?$/m)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
index abe8ced263d..5c272b6d6f1 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6552008c0d9d9075cbec9772.md
@@ -15,7 +15,7 @@ Start by finding the position of the first letter in the string. One way is to c
 text.find('W')
 ```
 
-Above, uppercase `W` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `W` character inside the string stored in the `text` variable.
+Above, uppercase `'W'` is the character you want to locate inside the string stored in the `text` variable. The method will return `6`, which is the index of the `'W'` character inside the string stored in the `text` variable.
 
 At the end of your code, call `.find()` on your `alphabet` string and pass `text[0]` to the method. Note that a method is just a function that belongs to an object (you will learn more about that in another project).
 
@@ -36,7 +36,7 @@ assert.match(code, /alphabet\.find\s*\(.*\)/)
 You should call the `.find()` method on the `alphabet` variable and pass `text[0]` to the method. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)/m)
+assert.match(code, /^alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
index 412619ccc4c..3e3af82109c 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655208d59b131e7816f18c96.md
@@ -22,7 +22,7 @@ assert.match(code, /^index\s*=/m)
 You should assign the value returned by `alphabet.find(text[0])` to your `index` variable.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\)\s*(#.*)?$/m)
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
index 34166fe3da4..83feddb9318 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655209a4a27dd37873c4cac3.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `H`, is not found, since `alphabet` contains only lowercase letters.
+`.find()` returns the index of the matching character inside the string. If the character is not found, it returns `-1`. As you can see, the first character in `text`, uppercase `'H'`, is not found, since `alphabet` contains only lowercase letters.
 
 You can transform a string into its lowercase equivalent with the `.lower()` method. Add another `print()` call to print `text.lower()` and see the output.
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
index 54d47cf3f49..9a554ddeef1 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520e6f2b9678799977f24d.md
@@ -27,7 +27,7 @@ assert.match(code, /^print\s*\(\s*index\s*\)/m);
 You should update your `alphabet.find(text[0])` call to use `text[0].lower()` as the argument. Pay attention to place the method call at the beginning of the line.
 
 ```js
-assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\[\s*\s*0\s*\]\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
+assert.match(code, /^index\s*=\s*alphabet\.find\s*\(\s*text\s*\[\s*\s*0\s*\]\s*\.lower\s*\(\s*\)\s*\)\s*(#.*)?$/m);
 ```
 
 Your code contains invalid syntax and/or invalid indentation.
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
index 95e2567fa84..e4c0036ebff 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65520f8282faf57a0db4f7fe.md
@@ -7,7 +7,7 @@ dashedName: step-20
 
 # --description--
 
-As you can see from the output, `h` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
+As you can see from the output, `'h'` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.
 
 Modify your `shifted` variable so that it stores the value of `alphabet` at index `index + shift`.
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
index 41811515713..a8da79ffd22 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65521203d7165c7b84b22ad4.md
@@ -35,14 +35,14 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i/m)
 ```
 
-You should write the `in` keyword after `for i `. Make sure to leave a space around the `in` keyword.
+You should write the `in` keyword after `for i`. Make sure to leave a space around the `in` keyword.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
 assert.match(commentless_code, /^for\s+i\s+in\s+/m)
 ```
 
-You should write `text` after `for i in `. Don't forget to add the final `:`.
+You should write `text` after `for i in`. Don't forget to add the final `:`.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
index b7051de41c3..bdf47ed7c6f 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655261b2e1f2c197093f3993.md
@@ -7,7 +7,7 @@ dashedName: step-42
 
 # --description--
 
-Currently, spaces get encrypted as `c`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
+Currently, spaces get encrypted as `'c'`. To maintain the original spacing in the plain message, you'll require a conditional `if` statement. This is composed of the `if` keyword, a condition, and a colon `:`.
 
 ```py
 if x != 0:
@@ -16,7 +16,7 @@ if x != 0:
 
 In the example above, the condition of the `if` statement is `x != 0`. The code `print(x)`, inside the `if` statement body, runs only when the condition evaluates to `True` (in this example, meaning that `x` is different from zero).
 
-At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `space!`. Remember to indent this line.
+At the top of your for loop, replace `print(char == ' ')` with an `if` statement.  The condition of this `if` statement should evaluate to `True` if `char` is an empty space and `False` otherwise. Inside the `if` body, print the string `'space!'`. Remember to indent this line.
 
 # --hints--
 
@@ -36,7 +36,7 @@ const {block_body} = __helpers.python.getBlock(commentless_code, /for\s+char\s+i
 assert(block_body.match(/if\s+char\s*==\s*("|')\s\1\s*:/));
 ```
 
-You should print the string `space!` inside your new `if` statement.
+You should print the string `'space!'` inside your new `if` statement.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
index 69191130521..f3fc108e506 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553980e0527fa115c705646.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Now, instead of printing `space!`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
+Now, instead of printing `'space!'`, use the addition assignment operator to add the space (currently stored in `char`) to the current value of `encrypted_text`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
index dfc91239b0e..f6ea23b4325 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6553a755879b131a445e664c.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Try to assign the string `Hello Zaira` to your `text` variable and see what happens in the console.
+Try to assign the string `'Hello Zaira'` to your `text` variable and see what happens in the console.
 
 # --hints--
 
@@ -17,7 +17,7 @@ You should have a `text` variable.
 assert.match(code, /^text\s*=/m)
 ```
 
-You should assign the string `Hello Zaira` to your `text` variable.
+You should assign the string `'Hello Zaira'` to your `text` variable.
 
 ```js
 assert.match(code, /^text\s*=\s*("|')Hello\sZaira\1/m)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
index 5629c8d00fb..b5f4088d3b7 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554930320d70414e7b6acc6.md
@@ -7,7 +7,7 @@ dashedName: step-58
 
 # --description--
 
-Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `python` to this variable.
+Delete your `shift` variable. Then, declare a new variable called `custom_key` and assign the value of the string `'python'` to this variable.
 
 # --hints--
 
@@ -23,7 +23,7 @@ You should declare a variable called `custom_key`.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should assign the string `python` to your `custom_key` variable.
+You should assign the string `'python'` to your `custom_key` variable.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "python") })
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
index 179f7313a5d..47211f5e8bc 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549561463f0016876e852c.md
@@ -7,8 +7,7 @@ dashedName: step-59
 
 # --description--
 
-Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text.
-At the beginning of your function body, declare a `key_index` variable and set it to zero.
+Since your key is shorter than the text that you will have to encrypt, you will need to repeat it to generate the whole encrypted text. At the beginning of your function body, declare a `key_index` variable and set it to zero.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
index 660fb4ab263..7e452e05438 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65549f90cf78131c96ebcf28.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
 
     for char in message.lower():
 --fcc-editable-region--
-        
+
         if char == ' ':
             encrypted_text += char
 --fcc-editable-region--            
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
index 7727f6c57a8..7ca155b0c73 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a49a4f782f208abcc87e.md
@@ -7,8 +7,7 @@ dashedName: step-62
 
 # --description--
 
-You will need to increase the `key_index` count for the next iteration.
-To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
+You will need to increase the `key_index` count for the next iteration. To do this, after the line you just added and in the same code block, use the addition assignment operator to increment `key_index` by one.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
index 67567e88cdf..a6cd4a9a348 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a57ec0a2c52106e7ee50.md
@@ -37,7 +37,7 @@ def vigenere(message, key):
         if char == ' ':
             encrypted_text += char
         else:
-            
+
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
index da202c1490a..7ca3ec197c0 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554a88d5af937226f4a9121.md
@@ -50,7 +50,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key):
             # Find the right key character to encode
             key_char = key[key_index % len(key)]
             key_index += 1
-            
+
 --fcc-editable-region--            
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
index 7ca7c2f323a..f783cbf3472 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ac937a49be2701af4f2f.md
@@ -32,7 +32,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -41,7 +41,7 @@ def vigenere(message, key):
             key_char = key[key_index % len(key)]
             key_index += 1
 --fcc-editable-region--
-            
+
             offset = alphabet.index(key_char)
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
index a371865b1ef..28c793c06c3 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554ad2463b8892748f8efdd.md
@@ -55,7 +55,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
index 60289b5525e..acf5b0f71c8 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d0332949b133a0b35eaa.md
@@ -43,7 +43,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -57,7 +57,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
index b1f7c3a5caa..87f8a5aa7f3 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d15c8acb5f34499ad789.md
@@ -31,7 +31,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 
 --fcc-editable-region--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
index 534ff69ec91..84f3a8477e1 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554d25dc5ceaa354307a77e.md
@@ -46,7 +46,7 @@ def vigenere(message, key):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -60,9 +60,9 @@ def vigenere(message, key):
             index = alphabet.find(char)
             new_index = (index + offset) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 --fcc-editable-region--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
index 3dfdd998a92..d29b009f3cf 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554de295ade563a069936a1.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -47,9 +47,9 @@ def vigenere(message, key, direction):
             new_index = (index + offset) % len(alphabet)
 --fcc-editable-region--
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 #encryption = vigenere(text, custom_key)
 #print(encryption)
 ```
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
index 330871bc52a..9f1ea94390c 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554dfce1683be3c0c9609a6.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,9 +45,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
-    
+
 --fcc-editable-region--
 #encryption = vigenere(text, custom_key)
 #print(encryption)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
index db2c5bdfe33..adf869e6b5f 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e0adc7bb193cbfdb36d5.md
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -59,7 +59,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
index b4b329858a2..8e744b4c09f 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e2ee23bfd93f2c83640f.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
index f49b76f417f..cd7e9ce3a58 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6554e343caea913ffba7bec6.md
@@ -39,7 +39,7 @@ def vigenere(message, key, direction):
     encrypted_text = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             encrypted_text += char
@@ -53,7 +53,7 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             encrypted_text += alphabet[new_index]
-    
+
     return encrypted_text
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
index b295655e5c6..a6ecf2194d0 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655516e410b8e30fb4fb64e8.md
@@ -38,7 +38,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -52,9 +52,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
index 521f1f961d3..d77bcd5d985 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65551a628bcb7e121e32d04b.md
@@ -19,7 +19,7 @@ You should have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should be equal to the string `Hello Zaira!`.
+Your `text` variable should be equal to the string `'Hello Zaira!'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "Hello Zaira!") })
@@ -40,7 +40,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -54,9 +54,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
index f9dfeed2c7d..a60afdc14cc 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555201d9b7fc917399f9f0b.md
@@ -53,9 +53,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
index fa8531f3421..40bfdb53982 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655520c20cb1e6177b0641d6.md
@@ -48,9 +48,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
index aba2d5665d2..822b22f2743 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655522883e66f618e03a9411.md
@@ -46,9 +46,9 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
index a8a4a146373..82df5c7e409 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555231eac4d9f19bd3d44b5.md
@@ -70,7 +70,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
index 900a42440bf..ceda0450cc8 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a111190e11f0963949e.md
@@ -51,7 +51,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
index b37f689c14a..c0d946a1d38 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552a9593755e1fb2f5ab50.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
index d863b1b5667..e86470c6c34 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65552b14e803731fe3c1e4ca.md
@@ -51,15 +51,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = vigenere(text, custom_key)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
index e7e001fd7b2..cb2c9d5e191 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65553159615a8123b190ee43.md
@@ -9,7 +9,7 @@ dashedName: step-86
 
 It works! Now, you are going to start with an encrypted message to be decrypted.
 
-Change the value of `text` to the string `mrttaqrhknsw ih puggrur`.
+Change the value of `text` to the string `'mrttaqrhknsw ih puggrur'`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ You should still have a `text` variable.
 ({ test: () => assert(__userGlobals.has("text")) })
 ```
 
-Your `text` variable should have the value of `mrttaqrhknsw ih puggrur`.
+Your `text` variable should have the value of `'mrttaqrhknsw ih puggrur'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("text"), "mrttaqrhknsw ih puggrur") })
@@ -54,15 +54,15 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
-    
+
 encryption = encrypt(text, custom_key)
 print(encryption)
 decryption = decrypt(encryption, custom_key)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
index 7295239a2e5..a2e43552133 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d6e12c95701172b55709.md
@@ -46,7 +46,7 @@ def vigenere(message, key, direction):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -60,9 +60,9 @@ def vigenere(message, key, direction):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
-    
+
 encryption = vigenere(text, custom_key, 1)
 print(encryption)
 decryption = vigenere(encryption, custom_key, -1)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
index 582c138e1b3..3cfffa05b63 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555d8b0b3d20b128bdadd37.md
@@ -31,7 +31,7 @@ def vigenere(message, key, direction=1):
     final_message = ''
 
     for char in message.lower():
-    
+
         # Append space to the message
         if char == ' ':
             final_message += char
@@ -45,7 +45,7 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 --fcc-editable-region--    
 encryption = vigenere(text, custom_key, 1)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
index 43650a129a7..b809b6cc227 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555db4a7b788e15795674e5.md
@@ -9,11 +9,11 @@ dashedName: step-88
 
 Two or more strings can be concatenated by using the `+` operator. For example: `'Hello' + ' there!'` results in `'Hello there!`.
 
-Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `Encrypted text: `. Pay attention to the spacing.
+Call the `print()` function and use the `+` operator to concatenate the `text` variable to the string `'Encrypted text: '`. Pay attention to the spacing.
 
 # --hints--
 
-You should call `print()` and pass `'Encrypted text: ' + text` as the arguments. 
+You should call `print()` and pass `'Encrypted text: ' + text` as the arguments.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--    
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
index 68b96128144..bb3bf128cf9 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555df0c81300b175308557d.md
@@ -7,11 +7,11 @@ dashedName: step-89
 
 # --description--
 
-Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+Below the `print()` call you just added, add another `print()` call to print `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 # --hints--
 
-You should have a `print()` call that prints `Key: python` by concatenating the string `Key: ` and the value of the `custom_key` variable.
+You should have a `print()` call that prints `Key: python` by concatenating the string `'Key: '` and the value of the `custom_key` variable.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
@@ -52,12 +52,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
index e52496dd150..6d5c9a3c856 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e1bfcd374e18c6be8e58.md
@@ -7,7 +7,7 @@ dashedName: step-90
 
 # --description--
 
-In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings. 
+In Python, there's a way to easily format strings. *f-strings* enable you to interpolate values in your strings.
 
 Interpolation means writing placeholders that will be replaced by the specified values when the program runs. For example, you can get the same result of `'Encrypted text: ' + text` with `f'Encrypted text: {text}'`. You need to put an `f` before the quotes to create the f-string and write the variables or expressions you want to interpolate between curly braces.
 
@@ -49,12 +49,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
index ebdb8b79456..4e28d4737fc 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e3f387381a19d5e00333.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
index 8e107b0fff4..d55577ba1cf 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e43e783ed31a0532b1b2.md
@@ -47,12 +47,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
index 0f916bf649e..073dfdcd2bb 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e547c18a2b1a7b795bd8.md
@@ -50,12 +50,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
index 23af806c5ce..006a04850ea 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6555e5991af57d1ae0e35f0a.md
@@ -7,7 +7,7 @@ dashedName: step-95
 
 # --description--
 
-Wait a minute! You cannot decrypt anything with the wrong key. Try with `happycoding`.
+Wait a minute! You cannot decrypt anything with the wrong key. Try with `'happycoding'`.
 
 With that, your cipher project is complete.
 
@@ -19,7 +19,7 @@ You should still have a `custom_key` variable.
 ({ test: () => assert(__userGlobals.has("custom_key")) })
 ```
 
-You should modify the `custom_key` value into `happycoding`.
+You should modify the `custom_key` value into `'happycoding'`.
 
 ```js
 ({ test: () => assert.equal(__userGlobals.get("custom_key"), "happycoding") })
@@ -54,12 +54,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
@@ -96,12 +96,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
index 05c44517e6f..9a4c27f1945 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/655a2a7210094920069b117c.md
@@ -7,8 +7,7 @@ dashedName: step-41
 
 # --description--
 
-Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare.
-They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
+Comparison operators allow you to compare two objects based on their values. You can use a comparison operator by placing it between the objects you want to compare. They return a *Boolean* value — namely `True` or `False` — depending on the truthfulness of the expression.
 
 Python has the following comparison operators:
 
@@ -47,11 +46,11 @@ Python has the following comparison operators:
   </tbody>
 </table>
 
-At the beginning of your loop body, print the result of comparing `char` with an empty space (`' '`). Use the equality operator `==` for that.
+At the beginning of your loop body, print the result of comparing `char` with a space (`' '`). Use the equality operator `==` for that.
 
 # --hints--
 
-You should compare `char` with an empty space using the equality operator inside your `for` loop.
+You should compare `char` with a space using the equality operator inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -62,7 +61,7 @@ You should compare `char` with an empty space using the equality operator inside
 })
 ```
 
-You should print the result of comparing `char` with an empty space inside your `for` loop.
+You should print the result of comparing `char` with a space inside your `for` loop.
 
 ```js
 ({ test: () => {
@@ -73,7 +72,7 @@ You should print the result of comparing `char` with an empty space inside your
 })
 ```
 
-You should print the result of comparing `char` with an empty space at the beginning of your loop.
+You should print the result of comparing `char` with a space at the beginning of your loop.
 
 ```js
 ({ test: () => {
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
index 34e53a7cc4f..86a5a8baa9a 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65687d2f8c7ee27b0446cef3.md
@@ -18,7 +18,7 @@ Give your `for` loop a body by adding a call to `print(i)`. Remember to indent t
 
 # --hints--
 
-You should add `print(i)` to your `for` loop body. Pay attention to the indentation. 
+You should add `print(i)` to your `for` loop body. Pay attention to the indentation.
 
 ```js
 assert.match(code, /^for\s+i\s+in\s+text:\s+print\s*\(\s*i\s*\)/m)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
index e7886b5f796..042349ee0a4 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656884439d4d7d929d58669d.md
@@ -15,7 +15,7 @@ Restore the indentation for your `print(i)` call.
 
 # --hints--
 
-You should indent `print(i)` inside your `for` loop body. 
+You should indent `print(i)` inside your `for` loop body.
 
 ```js
 const commentless_code = __helpers.python.removeComments(code);
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
index 6215b77a724..f971dfe2276 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/656886ec4e4d9b96ded3c565.md
@@ -13,7 +13,7 @@ Rename your `i` variable to `char`.
 
 # --hints--
 
-You should replace `i` with `char`. 
+You should replace `i` with `char`.
 
 ```js
 assert.match(code, /^for\s+char\s+in\s+text:\s+print\s*\(\s*char\s*\)/m)
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
index b2203350e08..97fee73da43 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688a50e6c998a21d8e41d3.md
@@ -7,7 +7,7 @@ dashedName: step-31
 
 # --description--
 
-Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `train`, but this is not valid:
+Strings are immutable, which means they cannot be changed once created. For example, you might think that the following code changes the value of `my_string` into the string `'train'`, but this is not valid:
 
 ```py
 my_string = 'brain'
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
index 39784236282..e2b04ef618e 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65688b5a1655a7a6caede847.md
@@ -14,7 +14,7 @@ message = 'Hello World'
 message = 'Hello there!'
 ```
 
-Delete the `text[0]` line and reassign `text` the string `Albatross`.
+Delete the `text[0]` line and reassign `text` the string `'Albatross'`.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*\[\s*0\s*\]\s*\=\s*("|')\w\1/.test(commentless_code));
 ```
 
-You should reassign `text` the string `Albatross`. Do not modify `text = 'Hello World'`.
+You should reassign `text` the string `'Albatross'`. Do not modify `text = 'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
index 076a71f8786..6b04513e34d 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/6568b7a40c7ba0ccbc4b4425.md
@@ -20,7 +20,7 @@ const commentless_code = __helpers.python.removeComments(code);
 assert.isFalse( /text\s*=\s*("|')Albatross\1/.test(commentless_code))
 ```
 
-You should still have a `text` variable with the value `Hello World`.
+You should still have a `text` variable with the value `'Hello World'`.
 
 ```js
 ({test: () => {
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
index 442d9c6cb33..a98c25c7099 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a450e8fb2c9d75c7378d28.md
@@ -73,12 +73,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
index 71e999219ba..d239d653b25 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-string-manipulation-by-building-a-cipher/65a51c9e000b660122b8b29e.md
@@ -45,12 +45,12 @@ def vigenere(message, key, direction=1):
             index = alphabet.find(char)
             new_index = (index + offset*direction) % len(alphabet)
             final_message += alphabet[new_index]
-    
+
     return final_message
 
 def encrypt(message, key):
     return vigenere(message, key)
-    
+
 def decrypt(message, key):
     return vigenere(message, key, -1)
 --fcc-editable-region--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
index aa6e2e1a563..e885930012e 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a153a6b362d103e125028.md
@@ -16,13 +16,13 @@ Delete `pass` and recursively call the `_insert` method on the left child of the
 You should call the `self._insert` method passing `node.left` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the `left` attribute of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(node\.left,\s*key\)/) });
+({ test: () => assert.match(code, /node\.left\s*=\s*self\._insert\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
index e83dc278aaf..0191977d8fe 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a158c7e80c810f6eff1e1.md
@@ -14,13 +14,13 @@ Inside your `elif` clause, replace `pass` with a call to the `_insert` method on
 You should call the `self._insert()` method passing `node.right` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should assign the result of your `self._insert()` call to the right attribute (`node.right`) of the current node.
 
 ```js
-({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /node\.right\s*=\s*self\._insert\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
index 3b8147e90c7..884f575c312 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a167ea3e96512bf1343ce.md
@@ -25,7 +25,7 @@ You should call the `_search` method within the `search` method.
 You should call the `_search` method passing `self.root` and `key` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
index 9eae48476f6..6c29c7be8c3 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a16db1ccc5e132b5bc44d.md
@@ -14,7 +14,7 @@ Now, make the `search` method return the result of the `_search()` call.
 You should prepend the `return` statement to your `_search()` call.
 
 ```js
-({ test: () => assert.match(code, /return\s+self\._search\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /return\s+self\._search\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
index 48c326b2a56..5ed67b39c1e 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a1a6d8c44db154b00c909.md
@@ -22,8 +22,8 @@ assert.match(after_split, /if\s+key\s+<\s+node\.key/);
 
 You should return `self._search(node.left, key)` from your new `if` block.
 
-```js    
-({ test: () => assert.match(code, /return\s+self\._search\(node\.left,\s*key\)/) });    
+```js
+({ test: () => assert.match(code, /return\s+self\._search\(\s*node\.left,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
index 8faea421246..bf013ae5a23 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a44442b60ee5a28df8ee5.md
@@ -25,14 +25,14 @@ assert.match(after_split, /self\._search/);
 You should pass two arguments to the call of the `_search` method: `node.right` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._search\(node\.right,\s*key\)/) });
+({ test: () => assert.match(code, /self\._search\(\s*node\.right,\s*key\s*\)/) });
 ```
 
 You should return the result of the `_search` method call.
 
 ```js
 ({
-  test: () => assert.match(code, /return\s+self\._search\(node\.right,\s*key\)/)
+  test: () => assert.match(code, /return\s+self\._search\(\s*node\.right,\s*key\s*\)/)
 });
 ```
 
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
index 5abf4c75f4c..c40c222f6f7 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a452d40556e5c25e4aac8.md
@@ -18,7 +18,7 @@ Within the `BinarySearchTree` class, define a `delete` method. It takes two para
 You should define a `delete` method with two parameters: `self` and `key`. Remember to use `pass`.
 
 ```js
-({ test: () => assert.match(code, /def\s+delete\(self,\s*key\)/) });
+({ test: () => assert.match(code, /def\s+delete\(\s*self,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
index 377aa20b540..da90582f298 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a45c52fa3ea5ece3034c7.md
@@ -14,7 +14,7 @@ Inside the `delete` method, delete `pass` and call the private helper method `_d
 Your `delete` method should call the `_delete` method with two arguments: `self.root` and `key`.
 
 ```js
-({ test: () => assert.match(code, /self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
index b62541d5517..96dc0ae6487 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4614304cd36031cb4e75.md
@@ -16,7 +16,7 @@ To handle this case, assign the result of the `_delete` call to `self.root`.
 You should assign the result of the `_delete()` call to `self.root`.
 
 ```js
-({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(self\.root,\s*key\)/) });
+({ test: () => assert.match(code, /self\.root\s*=\s*self\._delete\(\s*self\.root,\s*key\s*\)/) });
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
index bf6f2ab4ffe..eaad945afe5 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a46aa8e10c26218c5034c.md
@@ -14,7 +14,7 @@ Inside the `BinarySearchTree` class, define a new helper method called `_delete`
 You should define the `_delete` method inside the `BinarySearchTree` class with the parameters `self`, `node` and `key`. Remember to use the `pass` keyword.
 
 ```js
-assert.match(code, /def\s+_delete\(self,\s*node,\s*key\)/);
+assert.match(code, /def\s+_delete\(\s*self,\s*node,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
index 9c3f6fd608d..4ab93b0ed1e 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a47a9404d856743c7f529.md
@@ -14,13 +14,13 @@ Within the `if` block, replace `pass` with a call to the `_delete` method, passi
 You should call the `_delete` method with `node.left` and the `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to the left child (`node.left`) of the current node.
 
 ```js
-assert.match(code, /node\.left\s*=\s*self\._delete\(node\.left,\s*key\)/);
+assert.match(code, /node\.left\s*=\s*self\._delete\(\s*node\.left,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
index f134abeffb7..ac92cfee9a5 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a482dfc92896901b9c97e.md
@@ -23,13 +23,13 @@ assert.match(after_split, /elif\s+key\s+>\s+node\.key/);
 You should call the `_delete` method with `node.right` and `key` as the arguments.
 
 ```js
-assert.match(code, /self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 You should assign the result of the `_delete()` call to `node.right`.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right,\s*key\)/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right,\s*key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
index 8044566c26c..d1eb6b34a1d 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a4ffc762d117470b94e3b.md
@@ -20,7 +20,7 @@ For now, add a `_min_value` call after your `elif` block, passing `node.right` a
 You should assign `self._min_value(node.right)` to `node.key` after your `elif` block.
 
 ```js
-assert.match(code, /node\.key\s*=\s*self\._min_value\(node\.right\)/);
+assert.match(code, /node\.key\s*=\s*self\._min_value\(\s*node\.right\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
index 76ef5b24f04..df79cef13cd 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a50f992ba7177aff2b718.md
@@ -22,7 +22,7 @@ assert.match(code, /self\._delete\(\s*node\.right\s*,\s*node\.key\s*/);
 You should assign the return value of the `_delete()` call to the right child of the current node.
 
 ```js
-assert.match(code, /node\.right\s*=\s*self\._delete\(node\.right\,\s*node\.key/);
+assert.match(code, /node\.right\s*=\s*self\._delete\(\s*node\.right\,\s*node\.key/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
index 435d1ddb00b..7ac465af0b6 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a54cd88e33b8646c67e16.md
@@ -16,7 +16,7 @@ This will start the traversal from the root of the binary search tree (`self.roo
 You should call `_inorder_traversal` and pass `self.root` and `result` as the arguments.
 
 ```js
-({ test: () => assert.match(code, /self\._inorder_traversal\(self\.root,\s*result\)/) })
+({ test: () => assert.match(code, /self\._inorder_traversal\(\s*self\.root,\s*result\s*\)/) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
index 160ef3cc76a..676f1d70d0d 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a552337ee62882fdeee79.md
@@ -14,7 +14,7 @@ Define the `_inorder_traversal` method and give it three parameters: `self`, `no
 You should define a method `_inorder_traversal` that takes three parameters: `self`, `node`, and `result`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+_inorder_traversal\(self,\s*node,\s*result\)/);
+assert.match(code, /def\s+_inorder_traversal\(\s*self,\s*node,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
index 65729d86c26..03d6252fa8a 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a557104bb878962e2ae95.md
@@ -20,7 +20,7 @@ assert.match(code, /if\s+node:/);
 You should call `_inorder_traversal` on the `node.left` inside the `if` block.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.left\s*,\s*result\s*\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.left\s*,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
index e5e1e0c3494..18c8ee84959 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5607eec63b8c2b1d7087.md
@@ -14,7 +14,7 @@ Still inside the `if` block, append the `key` of the current node to the `result
 You should append `node.key` to the `result` list.
 
 ```js
-assert.match(code, /result\.append\(node\.key\)/);
+assert.match(code, /result\.append\(\s*node\.key\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
index 8bcee4f0320..0f4e6ba8b31 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a5637ad283d8d24dd49de.md
@@ -16,13 +16,13 @@ Create an instance of the `BinarySearchTree` class and assign it to the variable
 You should create an instance of the `BinarySearchTree` class.
 
 ```js
-assert.match(code, /BinarySearchTree\(\)/);
+assert.match(code, /BinarySearchTree\(\s*\)/);
 ```
 
 You should assign the new instance of `BinarySearchTree` to the variable `bst`.
 
 ```js
-assert.match(code, /bst\s*=\s*BinarySearchTree\(\)/);
+assert.match(code, /bst\s*=\s*BinarySearchTree\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
index 9803b737b56..b1b7f9e0265 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a56a6a1168a8f201ba666.md
@@ -20,7 +20,7 @@ assert.match(code, /nodes/);
 Your `node` variable should have the value `[50, 30, 20, 40, 70, 60, 80]`.
 
 ```js
-assert.match(code, /nodes\s*=\s*\[50,\s*30,\s*20,\s*40,\s*70,\s*60,\s*80\]/);
+assert.match(code, /nodes\s*=\s*\[\s*50\s*,\s*30\s*,\s*20\s*,\s*40\s*\s*,\s*70\s*,\s*60\s*,\s*80\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
index 32b2f2a450b..32a145ce809 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a577302a8a791ed62e8d9.md
@@ -16,7 +16,7 @@ This recursive call explores the entire right subtree in an in-order manner.
 You should call `_inorder_traversal` passing `node.right` and `result` as the arguments.
 
 ```js
-assert.match(code, /self\._inorder_traversal\(node\.right,\s*result\)/);
+assert.match(code, /self\._inorder_traversal\(\s*node\.right,\s*result\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
index 387e5cef4b7..f0878d8e559 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a585b87885d962f715a10.md
@@ -16,7 +16,7 @@ To change that to print a useful value, define another method named `__str__` in
 You should define a method `__str__` that takes a single argument `self`. Remember to use `pass`.
 
 ```js
-assert.match(code, /def\s+__str__\(self\)/);
+assert.match(code, /def\s+__str__\(\s*self\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
index df50b8cebd8..a9e209e59d0 100644
--- a/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
+++ b/curriculum/challenges/ukrainian/07-scientific-computing-with-python/learn-tree-traversal-by-building-a-binary-search-tree/655a58897968829714d6e359.md
@@ -14,7 +14,7 @@ In the body of the `__str__` method, delete `pass` and return the result of call
 You should return the string value of `self.key` from your `__str__` method.
 
 ```js
-({ test: () => assert.match(code, /^\s{8}return\s+str\(self\.key\)/m) })
+({ test: () => assert.match(code, /^\s{8}return\s+str\(\s*self\.key\s*\)/m) })
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md b/curriculum/challenges/ukrainian/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
index fa005703129..c88a1298587 100644
--- a/curriculum/challenges/ukrainian/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
+++ b/curriculum/challenges/ukrainian/14-responsive-web-design-22/learn-html-forms-by-building-a-registration-form/6537e0be715fcb57d31ba8c3.md
@@ -13,16 +13,12 @@ Well done! You have completed the final part of the _Registration Form_ practice
 
 # --hints--
 
-You should use an `a` element selector.
-
-```js
-assert.exists(new __helpers.CSSHelp(document).getStyle('a'));
-```
 
 You should give the `a` element a `color` of `#dfdfe2`.
 
 ```js
-assert.equal(new __helpers.CSSHelp(document).getStyle('a')?.color, 'rgb(223, 223, 226)');
+const linkElement = document.querySelector("a");
+assert.equal(window.getComputedStyle(linkElement)?.color, 'rgb(223, 223, 226)');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
index 7a46b3865ee..9567446d559 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/build-a-cash-register-project/build-a-cash-register.md
@@ -10,11 +10,9 @@ dashedName: build-a-cash-register
 
 Here you'll build a cash register app that will return change to the customer based on the price of the item, the amount of cash provided by the customer, and the amount of cash in the cash drawer. You'll also need to show different messages to the user in different scenarios, such as when the customer provides too little cash or when the cash drawer doesn't have enough to issue the correct change.
 
-There are a few variables you'll need to use in your code:
+In the `script.js` file, you have been provided with the `price` and `cid` variables. The `price` variable is the price of the item, and the `cid` variable is the cash-in-drawer, which is a 2D array listing the available currency in the cash drawer.
 
-- `price`: ціна товару у вигляді числа з рухомою комою.
-- `cash`: оплата за товар, яка надається через елемент `input` на сторінці.
-- `cid`: каса; 2D-масив, який містить список доступного обігу.
+The other variable you will need add is the `cash` variable, which is the amount of cash provided by the customer for the item, which is provided via an `input` element on the page.
 
 If you'd like to test your application with different values for `price` and `cid`, make sure to declare them with the `let` keyword so they can be reassigned by our tests.
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
index 983d38946e6..ab7eae5bb40 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/build-a-pokemon-search-app-project/build-a-pokemon-search-app.md
@@ -28,10 +28,10 @@ In this project, you'll build an app that will search for Pokémon by name or ID
 1. Ви повинні мати елемент з `id` зі значенням `special-defense`
 1. Ви повинні мати елемент з `id` зі значенням `speed`
 1. Якщо елемент `#search-input` містить значення `Red` та натиснути на елемент `#search-button`, то має з’явитись попередження з текстом `Pokémon not found`
-1. Якщо елемент `#search-input` містить значення `Pikachu` та натиснути на елемент `#search-button`, то значеннями в елементах `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack` та `#special-defense` відповідно мають бути `PIKACHU`, `#25` або `25`, `Weight: 60` або `60`, `Height: 4` або `4`, `35`, `55`, `40`, `50`, `50` та `90`
+1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively
 1. Якщо елемент `#search-input` містить значення `Pikachu` та натиснути на елемент `#search-button`, то на сторінку потрібно додати елемент `img` з `id` зі значенням `sprite` та `src` зі значенням спрайту покемона `front_default`
 1. When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the `#types` element should contain a single inner element with the value `ELECTRIC`. The `#types` element content should be cleared between searches
-1. Якщо елемент `#search-input` містить значення `94` та натиснути на елемент `#search-button`, то значеннями в елементах `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack` та `#special-defense` відповідно мають бути `GENGAR`, `#94` або `94`, `Weight: 405` або `405`, `Height: 15` або `15`, `60`, `65`, `60`, `130`, `75` та `110`
+1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed`elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively
 1. Якщо елемент `#search-input` містить значення `94` та натиснути на елемент `#search-button`, то на сторінку потрібно додати елемент `img` з `id` зі значенням `sprite` та `src` зі значенням спрайту покемона `front_default`
 1. When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the `#types` element should contain two inner elements with the text values `GHOST` and `POISON`, respectively. The `#types` element content should be cleared between searches
 
@@ -158,7 +158,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
+When the `#search-input` element contains the value `Pikachu` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `PIKACHU`, `#25` or `25`, `Weight: 60` or `60`, `Height: 4` or `4`, `35`, `55`, `40`, `50`, `50`, and `90`, respectively.
 
 ```js
 async () => {
@@ -251,7 +251,7 @@ async () => {
 };
 ```
 
-When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, and `#special-defense` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
+When the `#search-input` element contains the value `94` and the `#search-button` element is clicked, the values in the `#pokemon-name`, `#pokemon-id`, `#weight`, `#height`, `#hp`, `#attack`, `#defense`, `#special-attack`, `#special-defense`, and `#speed` elements should be `GENGAR`, `#94` or `94`, `Weight: 405` or `405`, `Height: 15` or `15`, `60`, `65`, `60`, `130`, `75`, and `110`, respectively.
 
 ```js
 async () => {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
index 26538423b6c..eeb85a4d3de 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507bcbfe4ede356e624395.md
@@ -11,7 +11,7 @@ dashedName: step-3
 
 Метод `.split()` приймає рядок та розділяє його на масив рядків. Ви можете передати йому рядок символів або RegEx у ролі роздільника. Наприклад, `string.split(",")` розділить рядок на місці коми та поверне масив рядків.
 
-Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces seperating your values. Збережіть масив у змінній `array`.
+Use the `/,\s*/g` regex to split the `value` string by commas. You can tweak it based on the number of spaces separating your values. Збережіть масив у змінній `array`.
 
 # --hints--
 
@@ -36,7 +36,7 @@ assert.match(code.toString(),  /array\s*=\s*value\.split()/);
 You should use `/,\s*/g` for the `split()` method's separator.
 
 ```js
-assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\)/);
+assert.match(code.toString(), /value\.split\(\s*\/,\s*\\s*\*\s*\/g\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
index c9bca34d56b..74a1f6b081a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c19151201368ee3e16c.md
@@ -22,7 +22,7 @@ assert.match(calculate.toString(), /numbers/);
 Ви повинні використати метод `.map()` на змінній `array`.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\)/);
+assert.match(calculate.toString(), /array\.map\(\s*\)/);
 ```
 
 Ви повинні призначити результат виклику `.map()` до змінної `numbers`.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
index 57b34f6b7ef..d70fb5de15d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507c4b63731437227b0134.md
@@ -24,7 +24,7 @@ array.map(el => {
 Метод `.map()` повинен мати функцію зворотного виклику, яка приймає параметр `el`.
 
 ```js
-assert.match(calculate.toString(), /array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Функція зворотного виклику повинна використовувати конструктор `Number`, щоб перетворити `el` у число.
@@ -42,7 +42,7 @@ assert.notMatch(calculate.toString(), /new/);
 Функція зворотного виклику повинна повернути елемент, перетворений у число.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
index f79de7f53c0..023e67f58d1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507d810f1a2e38f1908fd8.md
@@ -24,13 +24,13 @@ assert.match(calculate.toString(), /filtered/);
 Функція `calculate` повинна використовувати метод `.filter()` на масиві `numbers`.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\)/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*\)/)
 ```
 
 Ви повинні призначити результат `numbers.filter()` до змінної `filtered`.
 
 ```js
-assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\)/);
+assert.match(calculate.toString(), /filtered\s*=\s*numbers\.filter\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
index 2ff9a4dcc8d..900832f7562 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507e4562cdde3a28e8de1b.md
@@ -26,7 +26,7 @@ array.filter(el => {
 Your `.filter()` method should have a callback which accepts `el` as a parameter.
 
 ```js
-assert.match(calculate.toString(), /numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{/)
+assert.match(calculate.toString(), /numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{/)
 ```
 
 Your callback function should use `!` and `isNaN()` to check if `el` is NOT `NaN`.
@@ -38,7 +38,7 @@ assert.match(calculate.toString(), /!\s*(Number\.)?isNaN\(\s*el\s*\)/);
 Функція зворотного виклику повинна повернути елементи, які не є `NaN`.
 
 ```js
-assert.match(calculate.toString(), /(numbers\.filter\(\(?\s*el\s*\)?\s*=>|numbers\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(numbers\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|numbers\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
index 53063866574..32a0a261062 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63507ebb0c50ce3b9d669cd9.md
@@ -28,20 +28,19 @@ assert.notMatch(calculate.toString(), /filtered/);
 Ви повинні з’єднати виклик `.filter()` з викликом `.map()`.
 
 ```js
-console.log(calculate.toString());
 assert.match(calculate.toString(), /array\.map\(.*\)\.filter\(/s);
 ```
 
 Не вилучайте функцію зворотного виклику `.map()`.
 
 ```js
-assert.match(calculate.toString(), /(array\.map\(\(?\s*el\s*\)?\s*=>|array\.map\(function\s*\(?el\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
+assert.match(calculate.toString(), /(array\.map\(\s*(\(\s*el\s*\)|el)\s*=>|array\.map\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s+)?Number\(\s*el\s*\)/);
 ```
 
 Не вилучайте функцію зворотного виклику `.filter()`.
 
 ```js
-assert.match(calculate.toString(), /(\.filter\(\(?\s*el\s*\)?\s*=>|\.filter\(function\s*\(?el\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
+assert.match(calculate.toString(), /(\.filter\(\s*(\(\s*el\s*\)|el)\s*=>|\.filter\(\s*function\s*\(\s*el\s*\)\s*\{)\s*(return\s*)?!(Number\.)?isNaN\(\s*el\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
index 73bbf3434c6..5063c91bed8 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350805fe0fe283dd347b0dc.md
@@ -22,13 +22,13 @@ assert.match(getMean.toString(), /sum/);
 Your `getMean` function should use the `.reduce()` method of the `array` parameter.
 
 ```js
-assert.match(getMean.toString(), /array\.reduce\(\)/);
+assert.match(getMean.toString(), /array\.reduce\(\s*\)/);
 ```
 
 Ви повинні призначити результат `array.reduce()` до змінної `sum`.
 
 ```js
-assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\)/);
+assert.match(getMean.toString(), /sum\s*=\s*array\.reduce\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
index 292901aeff8..29a1098b185 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635080d80b72803e973841da.md
@@ -22,13 +22,13 @@ array.reduce((acc, el) => {
 Метод `reduce` повинен мати функцію зворотного виклику, яка приймає параметри `acc` та `el`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)/)
 ```
 
 Метод `reduce` має повернути суму `acc` та `el`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
index fc0ae99814b..27c0e1f3668 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6350854411ffb73feb6bb84e.md
@@ -22,7 +22,7 @@ array.reduce((acc, el) => acc + el.toLowerCase(), "");
 Метод `reduce` повинен мати початкове значення `0`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
index dc99d862253..bc21c1ef7c0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635085f80bd9b5429faa40c4.md
@@ -28,19 +28,19 @@ assert.notMatch(getMean.toString(), /mean\s*=/);
 Не змінюйте логіку в межах методу `reduce`.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)/)
 ```
 
 Ви повинні поділити результат методу `reduce` на довжину масиву.
 
 ```js
-assert.match(getMean.toString(), /(array\.reduce\(\(acc\s*,\s*el\s*\)\s*=>|array\.reduce\(function\s*\(acc\s*,\s*el\)\s*\{)\s*(return)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\)\s*\/\s*array\.length/)
+assert.match(getMean.toString(), /(array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>|array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{)\s*(return\s+)?\s*acc\s*\+\s*el;\s*\}?\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 Ви повинні використати прихований синтаксис return, щоб повернути результат `reduce`, поділений на довжину масиву.
 
 ```js
-assert.match(code, /const\s+getMean\s*=\s*\(?array\)?\s*=>\s*array\.reduce\(\(acc\s*,\s*el\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
+assert.match(code, /const\s+getMean\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*array\.reduce\(\s*\(\s*acc\s*,\s*el\s*\)\s*=>\s*acc\s*\+\s*el\s*,\s*0\s*\)\s*\/\s*array\.length/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
index 3c0a1a93cdd..68c73071e9d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/63508c898d753754757bd5e3.md
@@ -18,13 +18,13 @@ dashedName: step-21
 Метод `sort` повинен мати функцію зворотного виклику, яка приймає параметри `a` та `b`.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)/)
 ```
 
 Метод `sort` має повернути результат віднімання `b` від `a`.
 
 ```js
-assert.match(getMedian.toString(), /(array\.sort\(\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(function\s*\(\s*a\s*,\s*b\)\s*\{)\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /(array\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>|array\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{)\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
index 77bbbf424b2..062f3320eeb 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635090f47eb6d9563a6fed05.md
@@ -34,13 +34,13 @@ assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0
 If `array.length` is even, pass an array with the two middle numbers from the `sorted` array to the `getMean` function. The first item in the array argument should be the value at index `array.length / 2` from `sorted` and the second should use the value at the index `array.length / 2 - 1` from `sorted`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:/);
 ```
 
 Якщо довжина `array.length` є непарною, змінна `median` має призначити середнє число до змінної `median`. Середнє число є значенням `sorted` в `Math.floor(array.length / 2)`.
 
 ```js
-assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[sorted\[array\.length\s*\/\s*2\]\s*,\s*sorted\[\s*array\.length\s*\/\s*2\s*-\s*1\]\]\)\s*\:\s*sorted\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\)\];/);
+assert.match(getMedian.toString(), /median\s*=\s*array\.length\s*%\s*2\s*===\s*0\s*\?\s*getMean\(\s*\[\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*\]\s*,\s*sorted\s*\[\s*array\.length\s*\/\s*2\s*-\s*1\s*\]\s*\]\s*\)\s*\:\s*sorted\s*\[\s*Math\.floor\(\s*array\.length\s*\/\s*2\s*\)\s*\]\s*;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
index 62beef30e54..5f950c110f2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e79d15aae30fac58f48e.md
@@ -22,13 +22,13 @@ assert.match(calculate.toString(), /median\s*=/);
 Змінній `median` потрібно призначити значення `getMedian(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /median\s*=\s*getMedian\(numbers\)/);
+assert.match(calculate.toString(), /median\s*=\s*getMedian\(\s*numbers\s*\)/);
 ```
 
 Функція `calculate` повинна запитати DOM про елемент `#median` та встановити `textContent` на `median`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#median\1\)\.textContent\s*=\s*median/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#median\1\s*\)\.textContent\s*=\s*median/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
index 28daf32a832..34c877b2f66 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352e96d2604f813c656750b.md
@@ -22,14 +22,13 @@ assert.match(getMode.toString(), /array\.forEach\(/);
 Метод `.forEach()` повинен мати функцію зворотного виклику, яка приймає параметр `el`.
 
 ```js
-console.log(getMode.toString());
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)/);
 ```
 
 Метод `.forEach()` повинен збільшувати лічильник для кожного числа. Не забудьте про запасне значення.
 
 ```js
-assert.match(getMode.toString(), /(array\.forEach\(\(?\s*el\s*\)?\s*=>|array\.forEach\(function\s*\(?el\)?\s*\{)\s*\{?\s*(return)?\s*counts\[\s*el\s*\]\s*=\s*\(\s*counts\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
+assert.match(getMode.toString(), /(array\.forEach\(\s*(\(\s*el\s*\)|el)\s*=>|array\.forEach\(\s*function\s*\(\s*el\s*\)\s*\{)\s*\{?\s*(return)?\s*counts\s*\[\s*el\s*\]\s*=\s*\(\s*counts\s*\[\s*el\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1\s*\}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
index 93c643ce616..da1dae8ae08 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ec8b9c70fd17b8c7ba3f.md
@@ -24,19 +24,19 @@ assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.so
 Функція `getMode` повинна передати функцію зворотного виклику до методу `sort` з параметрами `a` та `b`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)/)
 ```
 
 Функція `getMode` повинна використовувати метод `sort`, щоб відсортувати масив `Object.keys()` та повернути значення `counts[b]` мінус значення `counts[a]`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)/)
 ```
 
 Змінна `highest` повинна мати значення першого запису відсортованого масиву `Object.keys(counts)`.
 
 ```js
-assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\[\s*b\s*\]\s*-\s*counts\[\s*a\s*\];?\s*\}\s*\)\[0\];/)
+assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)\s*\[\s*0\s*\]\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
index 3fdc0c1b16f..e927bcae627 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352edee8a4de01ad693f0e4.md
@@ -20,13 +20,13 @@ assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filte
 Метод `.filter()` повинен приймати функцію зворотного виклику з параметром `el`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)/);
 ```
 
 Метод `.filter()` повинен повернути, чи значення `counts[el]` дорівнює `counts[highest]`.
 
 ```js
-assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\[\s*el\s*\]\s*===\s*counts\[\s*highest\s*\];\s*\}/);
+assert.match(getMode.toString(), /mode\s*=\s*Object\.keys\(\s*counts\s*\)\.filter\(\s*function\s*\(\s*el\s*\)\s*\{\s*return\s+counts\s*\[\s*el\s*\]\s*===\s*counts\s*\[\s*highest\s*\]\s*;\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
index 564e0a9b6d4..9663a14b216 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f09b1e53a420e7873344.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /mode\s*=\s*getMode\(\s*numbers\s*\);/);
 Функція `calculate` повинна запитати DOM про елемент `#mode` та встановити `textContent` на `mode`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#mode\1\)\.textContent\s*=\s*mode;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#mode\1\s*\)\.textContent\s*=\s*mode;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
index 24fb83533f3..3adc5fe1294 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f179bdca23221298a5ba.md
@@ -12,7 +12,10 @@ dashedName: step-35
 Раніше ви дізнались про глобальний об’єкт `Math`. `Math` має метод `.min()` для отримання найменшого числа та метод `.max()` для отримання найбільшого числа. Ось приклад того, як отримати найменше число масиву:
 
 ```js
-Math.min(1, 9, 11, -3, 0.5);
+const numbersArr = [2, 3, 1];
+
+console.log(Math.min(...numbersArr));
+// Expected output: 1
 ```
 
 Оголосіть функцію `getRange`, яка приймає той самий параметр `array`, який ви використовували. Використовуючи `Math.min()`, `Math.max()` та spread-оператор, поверніть різницю між найбільшим та найменшим числом у списку.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
index 3cca588e049..0ced2a1a2bb 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352f2526dccb523150b64fb.md
@@ -14,13 +14,13 @@ dashedName: step-36
 Функція `calculate` повинна налаштовувати змінну `range` на результат `getRange(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /range\s*=\s*getRange\(numbers\);/);
+assert.match(calculate.toString(), /range\s*=\s*getRange\(\s*numbers\s*\);/);
 ```
 
 Функція `calculate` повинна налаштовувати `textContent` елемента `#range` на змінну `range`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#range\1\)\.textContent\s*=\s*range;/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#range\1\s*\)\.textContent\s*=\s*range;/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
index 4e6ffeacbb3..2d8865b73d1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352faf71a9db52631864634.md
@@ -26,13 +26,13 @@ assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(/);
 Змінна `differences` повинна використовувати параметр `el` у функції зворотного виклику.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Функція зворотного виклику `map` повинна повернути значення `el` мінус `mean`.
 
 ```js
-assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
+assert.match(getVariance.toString(), /differences\s*=\s*array\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+el\s*-\s*mean;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
index 2470ab291de..e6845a5327c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fbb93a91a8272f838d42.md
@@ -28,13 +28,13 @@ assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\
 Змінна `squaredDifferences` повинна використовувати параметр `el` у функції зворотного виклику.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?/);
 ```
 
 Функція зворотного виклику `map` повинна повернути значення `el`, піднесене до квадрата.
 
 ```js
-assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
+assert.match(getVariance.toString(), /squaredDifferences\s*=\s*differences\.map\(\s*function\s*\(?\s*el\s*\)?\s*\{\s*return\s+Math\.pow\(\s*el\s*,\s*2\s*\);\s*\}/);
 ```
 
 Функція зворотного виклику `map` повинна використовувати оператор `**`.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
index 6eb4e2fe98d..24b63ae1a2a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fcb156834128001ea945.md
@@ -28,14 +28,13 @@ assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDiffere
 Змінна `sumSquaredDifferences` повинна використовувати параметри `acc` та `el` у функції зворотного виклику.
 
 ```js
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Функція зворотного виклику `reduce` повинна повернути суму `acc` та `el`.
 
 ```js
-console.log(getVariance.toString());
-assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
+assert.match(getVariance.toString(), /sumSquaredDifferences\s*=\s*squaredDifferences\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*return\s*acc\s*\+\s*el\s*\;\s*\},\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
index b5802d8883f..d33c3b0f04a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fce75b2d3b2924930f1e.md
@@ -46,19 +46,19 @@ assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(/);
 Змінна `variance` повинна використовувати параметри `acc` та `el` у функції зворотного виклику.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)/);
 ```
 
 Функція зворотного виклику `reduce` повинна бути порожньою.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}/);
 ```
 
 Функція зворотного виклику `reduce` повинна мати початкове значення `0`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*\}\s*,\s*0\s*\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
index a9ee1fde633..bd74b33c742 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fe473d53592a40ae403b.md
@@ -14,37 +14,37 @@ dashedName: step-42
 Функція зворотного виклику `reduce` повинна мати змінну `difference`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=/);
 ```
 
 Змінна `difference` повинна мати значення `el` мінус `mean`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;/);
 ```
 
 Функція зворотного виклику `reduce` повинна мати змінну `squared`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=/);
 ```
 
 Змінна `squared` повинна мати значення `difference` у другому степені.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);/);
 ```
 
 Функція зворотного виклику `reduce` повинна повернути значення `acc` плюс `squared`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;/);
 ```
 
 Не вилучайте початкове значення `0` з методу `.reduce()`.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
index 4bfd4be48e1..1bdc58fe6c1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352fed209792d2b89e92ea1.md
@@ -16,7 +16,7 @@ dashedName: step-43
 Вам потрібно поділити результат виклику `.reduce()` на довжину масиву.
 
 ```js
-assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(function\s*\(?\s*acc\s*,\s*el\s*\)?\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\)\s*\/\s*array\.length;/);
+assert.match(getVariance.toString(), /variance\s*=\s*array\.reduce\(\s*function\s*\(\s*acc\s*,\s*el\s*\)\s*\{\s*var\s+difference\s*=\s*el\s*-\s*mean\s*;\s*var\s+squared\s*=\s*Math\.pow\(\s*difference\s*,\s*2\s*\);\s*return\s+acc\s*\+\s*squared\s*;\s*\}\s*,\s*0\s*\)\s*\/\s*array\.length;/);
 ```
 
 Ви повинні повернути значення `variance`.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
index 70970555024..320fdefaa16 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6352ff27e0e51b2c7dce0010.md
@@ -20,7 +20,7 @@ assert.match(calculate.toString(), /variance\s*=\s*getVariance\(\s*numbers\s*\)/
 Ви повинні встановити `textContent` елемента `#variance` на значення змінної `variance`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#variance\1\)\.textContent\s*=\s*variance/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#variance\1\s*\)\.textContent\s*=\s*variance/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
index 1e4a5442e46..e42a0e9515e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/635302be760d6031d11a06cd.md
@@ -14,13 +14,13 @@ dashedName: step-49
 Функція `calculate` повинна мати змінну `standardDeviation` зі значенням результату `getStandardDeviation(numbers)`.
 
 ```js
-assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(numbers\)/);
+assert.match(calculate.toString(), /standardDeviation\s*=\s*getStandardDeviation\(\s*numbers\s*\)/);
 ```
 
 Ви повинні оновити `textContent` елемента `#standardDeviation` на змінну `standardDeviation`.
 
 ```js
-assert.match(calculate.toString(), /document\.querySelector\(('|")#standardDeviation\1\)\.textContent\s*=\s*standardDeviation/);
+assert.match(calculate.toString(), /document\.querySelector\(\s*('|")#standardDeviation\1\s*\)\.textContent\s*=\s*standardDeviation/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
index e6164eaeddf..1ebe36af8c1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-advanced-array-methods-by-building-a-statistics-calculator/6374249d3fbf2a5b079ba036.md
@@ -16,19 +16,19 @@ dashedName: step-50
 Ви повинні викликати `.slice()` на параметрі `array`.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)/);
 ```
 
 Виклик `.sort()` повинен бути з’єднаним з викликом `.slice()`.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(/);
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(/);
 ```
 
 Не змінюйте функцію зворотного виклику методу `.sort()`.
 
 ```js
-assert.match(getMedian.toString(), /array\.slice\(\)\.sort\(function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return)?\s*a\s*\-\s*b/)
+assert.match(getMedian.toString(), /array\.slice\(\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*(return\s+)?\s*a\s*\-\s*b/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
index 034d5d9ec72..4d7b02969ec 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/64388945b59341057e955fbb.md
@@ -24,7 +24,7 @@ Use the `async` keyword to create an asynchronous arrow function called `fetchDa
 You should use the `async` keyword to create an asynchronous arrow function called `fetchData`.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*[^}]*\s*}/);
 ```
 
 `fetchData` should be defined.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
index a671c5f5a6a..c2c50a0bb23 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c0ab6779047014ca69b4f.md
@@ -37,7 +37,7 @@ assert.match(code, /\s*const\s+res\s*=\s*await\s+fetch\(\s*(.*)\s*\)/);
 You should pass in the `forumLatest` constant to the `fetch` call.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{\s*const\s+res\s*=\s*await\s+fetch\(\s*forumLatest\s*\)\s*;?\s*}\s*catch\s*\(\s*err\s*\)\s*{\s*}\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
index 284a34ef226..8caf98b7038 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c14c8027369027334e802.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+data/);
 You should assign `await res.json()` to the `data` variable.
 
 ```js
-assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\);?\s*/);
+assert.match(code, /\s*const\s+data\s*=\s*await\s+res\.json\(\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
index 715b2f06c66..2a409e15386 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c337176a83407d0cd915c.md
@@ -28,7 +28,7 @@ assert.match(code, /\s*try\s*{[\s\S]*\s*console\.log\(\s*data\s*\)[\s\S]*}\s*cat
 You should call the `fetchData()` function, after the `fetchData()` function is defined.
 
 ```js
-assert.match(code, /};?\s*fetchData\(\)/);
+assert.match(code, /};?\s*fetchData\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
index 67565ba282b..b47f90e9fa1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/643c565936a10109b3f59326.md
@@ -22,7 +22,7 @@ assert.match(code, /\s*showLatestPosts\(.*\);??\s*/);
 You should pass `data` as the argument to `showLatestsPosts()`.
 
 ```js
-assert.match(code, /\s*showLatestPosts\(data\);?\s*/);
+assert.match(code, /\s*showLatestPosts\(\s*data\s*\);?\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
index 29351910291..371a68b60cd 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6444ec416a1fe1017e517bd8.md
@@ -20,7 +20,7 @@ assert.match(code, /\s*const\s+thousands\s*=/);
 Your should assign `Math.floor(views / 1000)` to your `thousands` variable.
 
 ```js
-assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(views\s*\/\s*1000\)\s*/);
+assert.match(code, /\s*const\s+thousands\s*=\s*Math\.floor\(\s*views\s*\/\s*1000\s*\)\s*/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
index cd8d2c6a51c..e932986386d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/644b97360868a301bf9ba463.md
@@ -14,7 +14,7 @@ Inside the `if` statement, destructure `className` and `category` from the `allC
 You should destructure `className` and `category` from the `allCategories[id]` object. The properties can be in any order.
 
 ```js
-assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\[id\]\s*/g));
+assert(code.match(/const\s*\{\s*(className|category)\s*,\s*(className|category)\s*\}\s*=\s*allCategories\s*\[\s*id\s*\]\s*/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
index eaee0b3bd53..a0ed095c7c8 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/653f173100e7791a72a8a4c8.md
@@ -27,19 +27,19 @@ Inside your `fetchData` function, add a `try...catch` statement. The `catch` blo
 You should have a `try` block inside your `fetchData` function.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}/);
 ```
 
 You should have a `catch` block after your `try` block.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(.*\)\s*{[^}]*\s*}/);
 ```
 
 Your `catch` block should have an `err` parameter.
 
 ```js
-assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
+assert.match(code, /const\s+fetchData\s*=\s*async\s*\(\s*\)\s*=>\s*{\s*try\s*{[^}]*\s*}\s*catch\s*\(\s*err\s*\)\s*{[^}]*\s*}/);
 ```
 
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
index c2655b3772f..d15cf232a63 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-asynchronous-programming-by-building-an-fcc-forum-leaderboard/6573d962423e118f6d851e6b.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+postsContainer\s*=/);
 You should use `document.getElementById()` to get the `#posts-container` element.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)posts-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/);
 ```
 
 You should assign the `#posts-container` element to your `postsContainer` variable.
 
 ```js
-assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(('|"|`)posts-container\1\)/g));
+assert(code.match(/const\s+postsContainer\s*=\s*document\.getElementById\(\s*('|"|`)posts-container\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
index e106cbe26b0..f7767d7336c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6406a71d2b35103a340dba06.md
@@ -14,7 +14,7 @@ dashedName: step-3
 Функція `sortInputArray` має викликати `event.preventDefault()`.
 
 ```js
-assert.match(sortInputArray.toString(), /event\.preventDefault\(\)/);
+assert.match(sortInputArray.toString(), /event\.preventDefault\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
index 3d69248ecaa..b01c4383da6 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410edb33eeaf50dd9a22ab4.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*
 Призначте значення `array[j]` до `temp`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?/);
 ```
 
 Призначте значення `array[j + 1]` до `array[j]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?/);
 ```
 
 Призначте значення `temp` до `array[j + 1]`.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
index c3b77020e74..b7c95db3dde 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410efff0ae97c0f06856511.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished executing, return the sorted array.
 You should `return` the `array` variable.
 
 ```js
-assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\];?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\];?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
+assert.match(code, /const\s+bubbleSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*for\s*\(\s*let\s+j\s*=\s*0\s*;\s*j\s*<\s*array\.length\s*-\s*1\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\s*\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\);?\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*>\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*\)\s*{\s*const\s+temp\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*array\s*\[\s*j\s*\]\s*=\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*;?\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*temp\s*;?\s*}\s*}\s*}\s*return\s+array;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
index 25d058d1958..d9169362e4d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6410f9a443d57414ee50fada.md
@@ -17,7 +17,7 @@ You should remove your `console.log()` call.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(bubbleSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(bubbleSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
index 57196e7105e..3a78c83b434 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411024727181d190ef03166.md
@@ -22,19 +22,19 @@ assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{
 You should assign `array[i]` to `temp`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]/)
 ```
 
 You should assign `array[minIndex]` to `array[i]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]/)
 ```
 
 You should assign `temp` to `array[minIndex]`.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
index 6116412b187..bbf28819352 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64110727cefd3d1d9bdb0128.md
@@ -14,7 +14,7 @@ Finally, after your outer loop has finished, you need to return the array. Once
 You should `return` the `array` after your outer loop completes.
 
 ```js
-assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\[i\]\s*;?\s*array\[i\]\s*=\s*array\[minIndex\]\s*;?\s*array\[minIndex\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
+assert.match(code, /const\s+selectionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*let\s+minIndex\s*=\s*i\s*;?\s*for\s*\(\s*let\s+j\s*=\s*i\s*\+\s*1\s*;\s*j\s*<\s*array\.length\s*;\s*j\s*\+\+\s*\)\s*{\s*console\.log\(\s*array\s*,\s*array\s*\[\s*j\s*\]\s*,\s*array\s*\[\s*minIndex\s*\]\s*\);\s*if\s*\(\s*array\s*\[\s*j\s*\]\s*<\s*array\s*\[\s*minIndex\s*\]\s*\)\s*{\s*minIndex\s*=\s*j\s*;?\s*}\s*}\s*const\s+temp\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*array\s*\[\s*i\s*\]\s*=\s*array\s*\[\s*minIndex\s*\]\s*;?\s*array\s*\[\s*minIndex\s*\]\s*=\s*temp\s*;?\s*}\s*return\s+array;?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
index 2c7a95557df..40119bd1bc1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411083020a3101e9514a0f5.md
@@ -15,7 +15,7 @@ You should remove the `console.log()` statement from `selectionSort()`.
 
 ```js
 // Thanks loop-protect
-assert.notMatch(selectionSort.toString(), /console\.log\((?!"Potential infinite)/);
+assert.notMatch(selectionSort.toString(), /console\.log\(\s*(?!"Potential infinite)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
index ba8ea1f252e..81ad1adf167 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/6411135e9ee2fa26c882eb02.md
@@ -16,7 +16,7 @@ Do so by assigning the value at the `j` index to the next index.
 Before decrementing `j`, assign the value at `j` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
index 72b206195fe..4fcd4897f69 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112c9cf53d632910ea2f9b.md
@@ -16,7 +16,7 @@ Use the assignment operator to insert your current value into the correct index.
 You should assign `currValue` to the index `j + 1`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
+assert.match(code, /const\s+insertionSort\s*=\s*\(\s*array\s*\)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
index 55c23bcc2ef..598b229cee5 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-algorithmic-thinking-by-building-a-number-sorter/64112cea9e6ac22a314628b0.md
@@ -14,7 +14,7 @@ After your `for` loop has finished, you need to return the array. You should the
 You should `return` the `array`.
 
 ```js
-assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\];?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
+assert.match(code, /const\s+insertionSort\s*=\s*(\(\s*array\s*\)|array)\s*=>\s*{\s*for\s*\(\s*let\s+i\s*=\s*1\s*;\s*i\s*<\s*array\.length\s*;\s*i\s*\+\+\s*\)\s*{\s*const\s+currValue\s*=\s*array\s*\[\s*i\s*\]\s*;?\s*let\s+j\s*=\s*i\s*-\s*1\s*;?\s*while\s*\(\s*j\s*>=\s*0\s*&&\s*array\s*\[\s*j\s*\]\s*>\s*currValue\s*\)\s*{\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*array\s*\[\s*j\s*\]\s*;?\s*j--;?\s*\}\s*array\s*\[\s*j\s*\+\s*1\s*\]\s*=\s*currValue;?\s*\}\s*return\s+array;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
index a8b83864799..734b5510253 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a255dae245b52317da824a.md
@@ -11,7 +11,7 @@ dashedName: step-3
 
 Консоль розробника містить помилки, створені вашим кодом, але ви також можете використовувати її, щоб переглянути значення змінних у своєму коді, що корисно для налагодження.
 
-Додайте рядок `console.log("Hello World");` між тегами `script`. Потім натисніть кнопку «Консоль», щоб відкрити консоль. Ви повинні бачити текст `Hello World`.
+Додайте рядок `console.log("Hello World");` між тегами `script`. Потім натисніть кнопку «Консоль», щоб відкрити консоль. You should see the text `"Hello World"`.
 
 Зверніть увагу, що в кінці рядка стоїть крапка з комою. У JavaScript заведено закінчувати рядки коду крапкою з комою.
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
index 581ff046963..e5b2651c686 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3a488b24fb32b91155d56.md
@@ -10,10 +10,10 @@ dashedName: step-7
 Змінним можна <dfn>присвоїти</dfn> значення. Якщо так зробити під час оголошення, це називається <dfn>ініціалізацією</dfn>. Наприклад:
 
 ```js
-let camperbot = "Bot";
+let age = 32;
 ```
 
-Це ініціалізує змінну `camperbot` значенням `Bot` (рядок).
+This would initialize the `age` variable with a value of `32`, a number.
 
 Ініціалізуйте змінну `xp`, щоб вона мала значення `0` (число).
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
index 20045fbd7a0..0f8895910f2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b506dbaead396f58a701.md
@@ -15,7 +15,7 @@ let order = ["first", "second", "third"];
 
 Це масив, який містить три значення. Зверніть увагу, що значення розділені комами.
 
-Змініть змінну `inventory` так, щоб вона була масивом рядків `stick`, `dagger` та `sword`.
+Change your `inventory` variable to be an array with the strings `"stick"`, `"dagger"`, and `"sword"`.
 
 # --hints--
 
@@ -31,19 +31,19 @@ assert.isArray(inventory);
 assert.lengthOf(inventory, 3);
 ```
 
-Змінна `inventory` повинна містити рядок `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
 ```
 
-Змінна `inventory` повинна містити рядок `dagger`.
+Your `inventory` variable should include the string `"dagger"`.
 
 ```js
 assert.include(inventory, "dagger");
 ```
 
-Змінна `inventory` повинна містити рядок `sword`.
+Your `inventory` variable should include the string `"sword"`.
 
 ```js
 assert.include(inventory, "sword");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
index ccec4d022ab..1f2ec82a4e7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b5843544ce3a77459c27.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-Наразі гравець повинен починати тільки з `stick`. Змініть масив `inventory`, щоб він мав єдине значення `stick`.
+For now, you want the player to start with just the `"stick"`. Change the `inventory` array to have `"stick"` as its only value.
 
 # --hints--
 
@@ -23,7 +23,7 @@ assert.isArray(inventory);
 assert.lengthOf(inventory, 1);
 ```
 
-Змінна `inventory` повинна містити рядок `stick`.
+Your `inventory` variable should include the string `"stick"`.
 
 ```js
 assert.include(inventory, "stick");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
index 00ecf123a61..647553e4919 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3b79d520a7f3d0e25afd6.md
@@ -33,10 +33,10 @@ assert.match(code, /let\s+button1/);
 assert.match(code, /document\.querySelector/);
 ```
 
-Використайте селектор `#button1`.
+You should use the `"#button1"` selector.
 
 ```js
-assert.match(code, /querySelector\(('|")#button1\1\)/);
+assert.match(code, /querySelector\(\s*('|")#button1\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
index e7f690116fd..0a673a9d79c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c2fccf186146b59c6e96.md
@@ -9,12 +9,14 @@ dashedName: step-40
 
 `button1` represents your first `button` element. These elements have a special property called `onclick`, which you can use to determine what happens when someone clicks that button.
 
-Ви можете отримати доступ до властивостей в JavaScript різними способами. Першим є <dfn>точкова нотація</dfn>. Отримання доступу до властивості кнопки `onclick` виглядатиме так:
+Ви можете отримати доступ до властивостей в JavaScript різними способами. Першим є <dfn>точкова нотація</dfn>. Here is an example of using dot notation to set the `onclick` property of a button to a function reference.
 
 ```js
-button.onclick
+button.onclick = myFunction;
 ```
 
+In this example, `button` is the button element, and `myFunction` is a reference to a function. When the button is clicked, `myFunction` will be called.
+
 Use dot notation to set the `onclick` property of your `button1` to the function reference of `goStore`. Note that `button1` is already declared, so you don't need to use `let` or `const`.
 
 # --hints--
@@ -31,10 +33,10 @@ assert.match(code, /button1\.onclick/);
 assert.notMatch(code, /(let|const)\s+button1\.onclick/);
 ```
 
-You should assign the `goStore` function reference to `button1.onclick`.
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button1\.onclick\s*=\s*goStore/);
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
index 0aa374fc086..c190021a243 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c4a0e52767482c5202d4.md
@@ -13,6 +13,12 @@ dashedName: step-41
 
 # --hints--
 
+You should assign the `goStore` function reference to `button1.onclick`. Make sure not to call the function.
+
+```js
+assert.match(code, /button1\.onclick\s*=\s*goStore\s*;?\s*$/m);
+```
+
 Ви повинні використати крапкову нотацію, щоб отримати доступ до властивості `onclick` для `button2`.
 
 ```js
@@ -25,10 +31,10 @@ assert.match(code, /button2\.onclick/);
 assert.notMatch(code, /(let|const)\s+button2\.onclick/);
 ```
 
-Ви повинні встановити властивість `onclick` для `button2` на змінну `goCave`.
+You should assign the `goCave` function reference to `button2.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button2\.onclick\s*=\s*goCave/);
+assert.match(code, /button2\.onclick\s*=\s*goCave\s*;?\s*$/m);
 ```
 
 Ви повинні використати крапкову нотацію, щоб отримати доступ до властивості `onclick` для `button3`.
@@ -43,10 +49,10 @@ assert.match(code, /button3\.onclick/);
 assert.notMatch(code, /(let|const)\s+button3\.onclick/);
 ```
 
-Ви повинні встановити властивість `onclick` для `button3` на змінну `fightDragon`.
+You should assign the `fightDragon` function reference to `button3.onclick`. Make sure not to call the function.
 
 ```js
-assert.match(code, /button3\.onclick\s*=\s*fightDragon/);
+assert.match(code, /button3\.onclick\s*=\s*fightDragon\s*;?\s*$/m);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
index 6e022de5c67..45776b08252 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c8bf3980c14c438d2aed.md
@@ -7,7 +7,7 @@ dashedName: step-36
 
 # --description--
 
-Наразі зробіть так, щоб функція `goStore` виводила повідомлення `Going to store.` на консоль. Наприклад, ось функція, яка виводить повідомлення `Hello World`.
+For now, make your `goStore` function output the message `"Going to store."` to the console. For example, here is a function that outputs the message `"Hello World"`.
 
 ```js
 function functionName() {
@@ -20,13 +20,13 @@ function functionName() {
 Ви повинні мати рядок `console.log("Going to store.");` у коді. Не забудьте про крапку з комою.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to store\.\1\);/);
+assert.match(code, /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 Ваш рядок `console.log("Going to store.");` повинен бути всередині функції `goStore`.
 
 ```js
-assert.match(goStore.toString(), /console\.log\(('|")Going to store\.\1\);/);
+assert.match(goStore.toString(), /console\.log\(\s*('|")Going to store\.\1\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
index 9c0038a430e..4b53261dae1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3c91a2bab1b4d6fabb726.md
@@ -7,7 +7,7 @@ dashedName: step-37
 
 # --description--
 
-Тепер створіть функцію `goCave`, яка друкує `Going to cave.` на консолі.
+Now create a `goCave` function that prints `"Going to cave."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(goCave);
 Ви повинні мати рядок `console.log("Going to cave.");` у коді.
 
 ```js
-assert.match(code, /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 Ваш рядок `console.log("Going to cave.");` повинен бути всередині функції `goCave`.
 
 ```js
-assert.match(goCave.toString(), /console\.log\(('|")Going to cave\.\1\)/);
+assert.match(goCave.toString(), /console\.log\(\s*('|")Going to cave\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
index 6234bd0fa8d..b96ae35556b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cdb11478a34ff4a6470d.md
@@ -7,7 +7,7 @@ dashedName: step-38
 
 # --description--
 
-Тепер створіть функцію `fightDragon`, яка друкує `Fighting dragon.` на консолі.
+Now create a `fightDragon` function that prints `"Fighting dragon."` to the console.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.isFunction(fightDragon);
 Ви повинні мати рядок `console.log("Fighting dragon.");` у коді.
 
 ```js
-assert.match(code, /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(code, /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 Ваш рядок `console.log("Fighting dragon.");` повинен бути всередині функції `fightDragon`.
 
 ```js
-assert.match(fightDragon.toString(), /console\.log\(('|")Fighting dragon\.\1\)/);
+assert.match(fightDragon.toString(), /console\.log\(\s*('|")Fighting dragon\.\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
index 35600953257..451378f2726 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a3cfc8328d3351b95d4f61.md
@@ -9,21 +9,25 @@ dashedName: step-42
 
 Властивість `innerText` контролює текст, який з'являється в елементі HTML. Наприклад:
 
-```js
-const info = document.querySelector("#info");
-info.innerText = "Hello World";
+```html
+<p id="info">Demo content</p> 
 ```
 
-Цей код змінить елемент, який присвоєний змінній `info`, щоб той мав текст `Hello World`.
+```js
+const info = document.querySelector("#info"); 
+info.innerText = "Hello World"; 
+```
 
-Якщо гравець натискає на кнопку `Go to store`, потрібно, щоб змінювались кнопки та текст. Видаліть код всередині функції `goStore` та додайте рядок, який оновлює текст для `button1` на `Buy 10 health (10 gold)`.
+The following example would change the text of the `p` element from `Demo content` to `Hello World`.
+
+Якщо гравець натискає на кнопку `Go to store`, потрібно, щоб змінювались кнопки та текст. Remove the code inside the `goStore` function and add a line that updates the text of `button1` to say `"Buy 10 health (10 gold)"`.
 
 # --hints--
 
 Вам не потрібен рядок `console.log("Going to store.");` у коді.
 
 ```js
-assert.notMatch(code, /console\.log\(('|")Going to store\.\1\)/);
+assert.notMatch(code, /console\.log\(\s*('|")Going to store\.\1\s*\)/);
 ```
 
 Ви повинні використати крапкову нотацію, щоб отримати доступ до властивості `innerText` для `button1`.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
index 206cee6b5fb..bfa6fc36d2e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7beb1ad61211ac153707f.md
@@ -7,7 +7,7 @@ dashedName: step-43
 
 # --description--
 
-Тепер додайте рядок, який оновлює текст `button2` на `Buy weapon (30 gold)` та оновіть текст `button3` на `Go to town square`.
+Now, add a line that updates the text of `button2` to say `"Buy weapon (30 gold)"` and update the text of `button3` to say `"Go to town square"`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ assert.match(code, /button2\.innerText/);
 assert.notMatch(code, /(let|const)\s+button2\.innerText/);
 ```
 
-Ви повинні оновити властивість `innerText` для `button2` на `Buy weapon (30 gold)`.
+You should update the `innerText` property of `button2` to be `"Buy weapon (30 gold)"`.
 
 ```js
 assert.match(code, /button2\.innerText\s*=\s*('|")Buy weapon \(30 gold\)\1/);
@@ -47,7 +47,7 @@ assert.match(code, /button3\.innerText/);
 assert.notMatch(code, /(let|const)\s+button3\.innerText/);
 ```
 
-Ви повинні оновити властивість `innerText` для `button3` на `Go to town square`.
+You should update the `innerText` property of `button3` to be `"Go to town square"`.
 
 ```js
 assert.match(code, /button3\.innerText\s*=\s*('|")Go to town square\1/);
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
index 80cb8776526..5e084d288d2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7bfabe119461eb13ccbd6.md
@@ -7,7 +7,7 @@ dashedName: step-45
 
 # --description--
 
-Тепер вам потрібно змінити показуваний текст. Змініть властивість `innerText` для `text` на `You enter the store.`.
+Тепер вам потрібно змінити показуваний текст. Change the `innerText` property of the `text` to be `"You enter the store."`.
 
 # --hints--
 
@@ -23,7 +23,7 @@ assert.match(code, /text\.innerText/);
 assert.notMatch(code, /(let|const)\s+text\.innerText/);
 ```
 
-Ви повинні оновити властивість `innerText` для `text` на `You enter the store.`.
+You should update the `innerText` property of `text` to be `"You enter the store."`.
 
 ```js
 assert.match(code, /text\.innerText\s*=\s*('|")You enter the store.\1/);
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
index 72c4e97184b..e22793b6307 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7c071219da921758a35bb.md
@@ -7,25 +7,25 @@ dashedName: step-48
 
 # --description--
 
-У своїй функції `goTown` змініть властивості `innerText` елементів `button` на `Go to store`, `Go to cave` та `Fight dragon`. Оновіть значення `onclick` на `goStore`, `goCave` та `fightDragon`.
+In your `goTown` function, change your `button` elements' `innerText` properties to be `"Go to store"`, `"Go to cave"`, and `"Fight dragon"`. Оновіть значення `onclick` на `goStore`, `goCave` та `fightDragon`.
 
-Finally, update `innerText` property of your `text` to be `You are in the town square. You see a sign that says Store.`.
+Finally, update `innerText` property of your `text` to be `"You are in the town square. You see a sign that says Store."`.
 
 # --hints--
 
-Ви повинні встановити властивість `button1.innerText` на `Go to store` у своїй функції `goTown`.
+You should set the `button1.innerText` property to be `"Go to store"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-Ви повинні встановити властивість `button2.innerText` на `Go to cave` у своїй функції `goTown`.
+You should set the `button2.innerText` property to be `"Go to cave"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-Ви повинні встановити властивість `button3.innerText` на `Fight dragon` у своїй функції `goTown`.
+You should set the `button3.innerText` property to be `"Fight dragon"` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -49,7 +49,7 @@ assert.match(goTown.toString(), /button2\.onclick\s*=\s*goCave/);
 assert.match(goTown.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-Ви повинні встановити властивість `text.innerText` на `You are in the town square. You see a sign that says Store.` у своїй функції `goTown`.
+You should set the `text.innerText` property to be `"You are in the town square. You see a sign that says Store."` in your `goTown` function.
 
 ```js
 assert.match(goTown.toString(), /text\.innerText\s*=\s*('|")You are in the town square. You see a sign that says Store\.\1/);
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
index 1ff8cb8cc9f..35ff65f470f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a7cc99577fbf25ee7a7d76.md
@@ -28,7 +28,7 @@ assert.match(code, /function\s+update/);
 Ваша функція `update` повинна приймати параметр під назвою `location`.
 
 ```js
-assert.match(update.toString(), /update\(location\)/);
+assert.match(update.toString(), /update\(\s*location\s*\)/);
 ```
 
 Ваша функція `update` повинна бути порожньою.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
index 55dfd3119ae..b5e47d819b9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8aa98a8289d0a698eee1d.md
@@ -7,7 +7,7 @@ dashedName: step-53
 
 # --description--
 
-<dfn>Властивості</dfn> об’єкта записуються парами `key: value`, де `key` – ім’я властивості (або ключа), а `value` – значення властивості. Наприклад, ось об’єкт з ключем `name`, встановленим на `Quincy Larson`.
+<dfn>Властивості</dfn> об’єкта записуються парами `key: value`, де `key` – ім’я властивості (або ключа), а `value` – значення властивості. For example, here is an object with a key of `name` set to `"Quincy Larson"`.
 
 ```js
 {
@@ -15,7 +15,7 @@ dashedName: step-53
 }
 ```
 
-Додайте властивість `name` до свого порожнього об’єкта та надайте йому значення `town square`.
+Add a `name` property to your empty object and give it a value of `"town square"`.
 
 # --hints--
 
@@ -31,7 +31,7 @@ assert.isObject(locations[0]);
 assert.isDefined(locations[0].name);
 ```
 
-Ваше перше значення `locations` повинне мати властивість `name` зі значенням `town square`.
+Your first value of `locations` should have a `name` property with a value of `"town square"`.
 
 ```js
 assert.equal(locations[0].name, "town square");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
index 272a810226c..71a8263eb96 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ac194679e60cb561b0a8.md
@@ -25,19 +25,19 @@ assert.isString(locations[0]["button text"][1]);
 assert.isString(locations[0]["button text"][2]);
 ```
 
-Першим значенням у масиві `button text` повинне бути "Go to store".
+The first value in the `button text` array should be `"Go to store"`.
 
 ```js
 assert.equal(locations[0]["button text"][0], "Go to store");
 ```
 
-Другим значенням у масиві `button text` повинне бути "Go to cave".
+The second value in the `button text` array should be `"Go to cave"`.
 
 ```js
 assert.equal(locations[0]["button text"][1], "Go to cave");
 ```
 
-Третім значенням у масиві `button text` повинне бути "Fight dragon".
+The third value in the `button text` array should be `"Fight dragon"`.
 
 ```js
 assert.equal(locations[0]["button text"][2], "Fight dragon");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
index dbe39e220d6..694c2a702e7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ade9b2f5b30ef0b606c2.md
@@ -23,7 +23,7 @@ assert.isDefined(locations[0]["text"]);
 assert.isString(locations[0]["text"]);
 ```
 
-Ваша властивість `text` повинна мати значення `You are in the town square. You see a sign that says \"Store\".`
+Your `text` property should have the value `"You are in the town square. You see a sign that says \"Store\"."`
 
 ```js
 assert.equal(locations[0]["text"], "You are in the town square. You see a sign that says \"Store\".");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
index 702439c8083..343ef95eaa1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ae85fcaedc0fddc7ca4f.md
@@ -37,7 +37,7 @@ assert.equal(locations[1].name, "store");
 assert.isArray(locations[1]["button text"]);
 ```
 
-Ваша властивість `button text` повинна мати такі значення рядків: `Buy 10 health (10 gold)`, `Buy weapon (30 gold)` та `Go to town square`.
+Your `button text` property should have the string values `"Buy 10 health (10 gold)"`, `"Buy weapon (30 gold)"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[1]["button text"][0], "Buy 10 health (10 gold)");
@@ -65,7 +65,7 @@ assert.equal(locations[1]["button functions"][2], goTown);
 assert.isString(locations[1].text);
 ```
 
-Ваш другий об’єкт `locations` повинен мати властивість `text` зі значенням `You enter the store.`.
+Your second `locations` object should have a `text` property with the value of `"You enter the store."`.
 
 ```js
 assert.equal(locations[1].text, "You enter the store.");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
index d081f2fb2e9..7bcff2f2a84 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b0b5053f16111b0b6b5f.md
@@ -11,19 +11,19 @@ dashedName: step-59
 
 # --hints--
 
-Ваша функція `update` повинна встановити `button1.innerText` на `Go to store`.
+Your `update` function should set `button1.innerText` to `"Go to store"`.
 
 ```js
 assert.match(update.toString(), /button1\.innerText\s*=\s*('|")Go to store\1/);
 ```
 
-Ваша функція `update` повинна встановити `button2.innerText` на `Go to cave`.
+Your `update` function should set `button2.innerText` to `"Go to cave"`.
 
 ```js
 assert.match(update.toString(), /button2\.innerText\s*=\s*('|")Go to cave\1/);
 ```
 
-Ваша функція `update` повинна встановити `button3.innerText` на `Fight dragon`.
+Your `update` function should set `button3.innerText` to `"Fight dragon"`.
 
 ```js
 assert.match(update.toString(), /button3\.innerText\s*=\s*('|")Fight dragon\1/);
@@ -47,7 +47,7 @@ assert.match(update.toString(), /button2\.onclick\s*=\s*goCave/);
 assert.match(update.toString(), /button3\.onclick\s*=\s*fightDragon/);
 ```
 
-Ваша функція `update` повинна встановити `text.innerText` на `You are in the town square. You see a sign that says \"Store\".`.
+Your `update` function should set `text.innerText` to `"You are in the town square. You see a sign that says \"Store\"."`.
 
 ```js
 assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town square. You see a sign that says \\"Store\\"\."/);
@@ -56,13 +56,13 @@ assert.match(update.toString(), /text\.innerText\s*=\s*"You are in the town squa
 Ваша функція `goTown` повинна бути порожньою.
 
 ```js
-assert.match(goTown.toString(), /function goTown\(\) \{\}/);
+assert.match(goTown.toString(), /function goTown\(\s*\) \{\}/);
 ```
 
 Ваша функція `goStore` повинна бути порожньою.
 
 ```js
-assert.match(goStore.toString(), /function goStore\(\) \{\}/);
+assert.match(goStore.toString(), /function goStore\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
index a22e2adc8d5..c1cabeab910 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b1762b7775124622e1a3.md
@@ -20,13 +20,13 @@ myFunction();
 Ви повинні викликати функцію `update` у функції `goTown`.
 
 ```js
-assert.match(goTown.toString(), /update\(\)/);
+assert.match(goTown.toString(), /update\(\s*\)/);
 ```
 
 Не забудьте про крапку з комою в кінці.
 
 ```js
-assert.match(goTown.toString(), /update\(\);/);
+assert.match(goTown.toString(), /update\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
index 07cf742710c..83fe26b435f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b3cc436db8139cc5fc09.md
@@ -20,7 +20,7 @@ myFunction(arg)
 Передайте масив `locations` до виклику `update`.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
index 37ae86fad86..4732e25abe6 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b6536156c51500739b41.md
@@ -7,7 +7,7 @@ dashedName: step-62
 
 # --description--
 
-Масив `locations` містить дві локації: `town square` та `store`. Наразі ви передаєте цілий масив до функції `update`.
+The `locations` array contains two locations: the `"town square"` and the `"store"`. Наразі ви передаєте цілий масив до функції `update`.
 
 Передайте лише перший елемент масиву `locations`, додавши `[0]` в кінці змінної. Наприклад: `myFunction(arg[0]);`.
 
@@ -18,25 +18,25 @@ dashedName: step-62
 Використайте дужкову нотацію з `locations`.
 
 ```js
-assert.match(code, /locations\[/);
+assert.match(code, /locations\s*\[/);
 ```
 
 Ви повинні отримати доступ до першого об‘єкта у масиві `locations`. Пам’ятайте, що масиви починаються з нуля.
 
 ```js
-assert.match(code, /locations\[0\]/);
+assert.match(code, /locations\s*\[\s*0\s*\]/);
 ```
 
 Передайте перший об’єкт у масиві `locations` до функції `update`.
 
 ```js
-assert.match(code, /update\(locations\[0\]\);/);
+assert.match(code, /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 Цей виклик досі повинен бути у функції `goTown()`.
 
 ```js
-assert.match(goTown.toString(), /update\(locations\[0\]\);/);
+assert.match(goTown.toString(), /update\(\s*locations\s*\[\s*0\s*\]\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
index ee0f95426fb..bc8310bb6b0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b711ab7a12161c7d9b67.md
@@ -9,20 +9,20 @@ dashedName: step-63
 
 Тепер ваша функція `update` повинна використовувати аргумент, який ви передали.
 
-Всередині функції `update` змініть значення присвоєння `button1.innerText` на `location["button text"]`. Дужкова нотація використана для того, щоб отримати властивість `button text` об’єкта `location`, переданого до функції.
+Всередині функції `update` змініть значення присвоєння `button1.innerText` на `location["button text"]`. That way, you use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 # --hints--
 
-Ваша функція `update` повинна використовувати дужкову нотацію, щоб отримати властивість `button text` об’єкта `location`, переданого до функції.
+Your `update` function should use bracket notation to get the `"button text"` property of the `location` object passed into the function.
 
 ```js
 assert.match(update.toString(), /location[('|")button text\1]/);
 ```
 
-Ви повинні присвоїти значення властивості `button text` об’єкта `location` до властивості `innerText` для `button1`.
+You should assign the value of the `"button text"` property of the `location` object to the `innerText` property of `button1`.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
index 601cce94b27..2fdfd16159c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8b9770050d217d2247801.md
@@ -7,20 +7,20 @@ dashedName: step-64
 
 # --description--
 
-`location["button text"]` є масивом з трьома елементами. Натомість змініть присвоєння `button1.innerText` на перший елемент цього масиву.
+`location["button text"]` є масивом з трьома елементами. Change the `button1.innerText` assignment to be `location["button text"][0]` which represents the first element of the array.
 
 # --hints--
 
-You should access the first element of the `button text` property of the `location` parameter.
+You should access the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.innerText` property to be the first element of the `button text` property of the `location` parameter.
+You should set the `button1.innerText` property to be the first element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.innerText\s*=\s*location\[('|")button text\1\]\[0\]/);
+assert.match(update.toString(), /button1\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
index 293af2272a3..2e2b09dd440 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c0c8313e891a15ec23e7.md
@@ -7,32 +7,32 @@ dashedName: step-65
 
 # --description--
 
-Тепер оновіть `button2.innerText` та `button3.innerText`, щоб їм відповідно були призначені друге та третє значення масиву `button text`.
+Now update `button2.innerText` and `button3.innerText` to be assigned the second and third values of the `"button text"` array, respectively.
 
 # --hints--
 
-You should access the second element of the `button text` property of the `location` parameter.
+You should access the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.innerText` property to be the second element of the `button text` property of the `location` parameter.
+You should set the `button2.innerText` property to be the second element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.innerText\s*=\s*location\[('|")button text\1\]\[1\]/);
+assert.match(update.toString(), /button2\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button text` property of the `location` parameter.
+You should access the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.innerText` property to be the third element of the `button text` property of the `location` parameter.
+You should set the `button3.innerText` property to be the third element of the `"button text"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.innerText\s*=\s*location\[('|")button text\1\]\[2\]/);
+assert.match(update.toString(), /button3\.innerText\s*=\s*location\s*\[\s*('|")button text\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
index d4214d7fd69..ec28a7497c9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c1154d3ae11aee80353f.md
@@ -7,44 +7,44 @@ dashedName: step-66
 
 # --description--
 
-Дотримуючись того самого шаблону, що й для тексту кнопки, оновіть призначення `onclick` трьох кнопок, щоб вони були першим, другим та третім значеннями масиву `button functions`.
+Following the same pattern as you did for the button text, update the three buttons' `onclick` assignments to be the first, second, and third values of the `"button functions"` array.
 
 # --hints--
 
-You should access the first element of the `button functions` property of the `location` parameter.
+You should access the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should set the `button1.onclick` property to be the first element of the `button functions` property of the `location` parameter.
+You should set the `button1.onclick` property to be the first element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button1\.onclick\s*=\s*location\[('|")button functions\1\]\[0\]/);
+assert.match(update.toString(), /button1\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*0\s*\]/);
 ```
 
-You should access the second element of the `button functions` property of the `location` parameter.
+You should access the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should set the `button2.onclick` property to be the second element of the `button functions` property of the `location` parameter.
+You should set the `button2.onclick` property to be the second element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button2\.onclick\s*=\s*location\[('|")button functions\1\]\[1\]/);
+assert.match(update.toString(), /button2\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*1\s*\]/);
 ```
 
-You should access the third element of the `button functions` property of the `location` parameter.
+You should access the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
-You should set the `button3.onclick` property to be the third element of the `button functions` property of the `location` parameter.
+You should set the `button3.onclick` property to be the third element of the `"button functions"` property of the `location` parameter.
 
 ```js
-assert.match(update.toString(), /button3\.onclick\s*=\s*location\[('|")button functions\1\]\[2\]/);
+assert.match(update.toString(), /button3\.onclick\s*=\s*location\s*\[\s*('|")button functions\1\s*\]\s*\[\s*2\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
index 3789da194e5..f1f31db3647 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c173949f851c83c64756.md
@@ -22,7 +22,7 @@ assert.match(goStore.toString(), /update\(/);
 Ваша функція `goStore` повинна передати другий елемент масиву `locations` як аргумент до `update()`.
 
 ```js
-assert.match(goStore.toString(), /update\(locations\[1\]\)/);
+assert.match(goStore.toString(), /update\(\s*locations\s*\[\s*1\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
index 199933eb382..582876c5101 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c242b25a531f2909e5bc.md
@@ -26,13 +26,13 @@ assert.isFunction(fightBeast);
 `fightSlime` має бути порожньою.
 
 ```js
-assert.match(fightSlime.toString(), /function fightSlime\(\) \{\}/);
+assert.match(fightSlime.toString(), /function fightSlime\(\s*\) \{\}/);
 ```
 
 `fightBeast` має бути порожньою.
 
 ```js
-assert.match(fightBeast.toString(), /function fightBeast\(\) \{\}/);
+assert.match(fightBeast.toString(), /function fightBeast\(\s*\) \{\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
index 0d888c1cee6..96c45c78307 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c2bbbd8aa82052f47c53.md
@@ -9,14 +9,13 @@ dashedName: step-70
 
 Додайте третій об’єкт до масиву `locations`. Надайте йому ті самі властивості, що й двом іншим об’єктам.
 
-Встановіть `name` на `cave`. Встановіть `button text` на масив з рядками `Fight slime`, `Fight fanged beast` та `Go to town square`. Встановіть `button functions` на масив зі змінними `fightSlime`, `fightBeast` та `goTown`. Встановіть властивість `text` на `You enter the cave. You see some monsters.`.
+Встановіть `name` на `cave`. Set `button text` to an array with the strings `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`. Set the `"button functions"` to an array with the variables `fightSlime`, `fightBeast`, and `goTown`. Set the `text` property to `"You enter the cave. You see some monsters."`.
 
 # --hints--
 
 Ви повинні мати три значення в своєму масиві `locations`.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 3);
 ```
 
@@ -26,19 +25,19 @@ assert.lengthOf(locations, 3);
 assert.isObject(locations[2]);
 ```
 
-Ваш третій об’єкт `locations` повинен мати властивість `name` зі значенням `cave`.
+Your third `locations` object should have a `name` property with the value of `"cave"`.
 
 ```js
 assert.equal(locations[2].name, "cave");
 ```
 
-Ваш третій об’єкт `locations` повинен мати властивість `button text`, яка є масивом.
+Your third `locations` object should have a `"button text"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button text"]);
 ```
 
-Ваша властивість `button text` повинна мати рядкові значення `Fight slime`, `Fight fanged beast` та `Go to town square`.
+Your `"button text"` property should have the string values `"Fight slime"`, `"Fight fanged beast"`, and `"Go to town square"`.
 
 ```js
 assert.equal(locations[2]["button text"][0], "Fight slime");
@@ -46,13 +45,13 @@ assert.equal(locations[2]["button text"][1], "Fight fanged beast");
 assert.equal(locations[2]["button text"][2], "Go to town square");
 ```
 
-Ваш третій об’єкт `locations` повинен мати властивість `button functions`, яка є масивом.
+Your third `locations` object should have a `"button functions"` property which is an array.
 
 ```js
 assert.isArray(locations[2]["button functions"]);
 ```
 
-Ваша властивість `button functions` повинна мати значення функції `fightSlime`, `fightBeast` та `goTown`.
+Your `"button functions"` property should have the function values `fightSlime`, `fightBeast`, and `goTown`.
 
 ```js
 assert.equal(locations[2]["button functions"][0], fightSlime);
@@ -66,7 +65,7 @@ assert.equal(locations[2]["button functions"][2], goTown);
 assert.isString(locations[2].text);
 ```
 
-Ваш третій об'єкт `locations` повинен мати властивість `text` зі значенням `You enter the cave. You see some monsters.`.
+Your third `locations` object should have a `text` property with the value of `"You enter the cave. You see some monsters."`.
 
 ```js
 assert.equal(locations[2].text, "You enter the cave. You see some monsters.");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
index 8b0a1b8725f..12f1c0b3a26 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c31ec0ec78216a1c36a0.md
@@ -7,7 +7,7 @@ dashedName: step-71
 
 # --description--
 
-Тепер коли ви маєте об'єкт `cave`, оновіть свою функцію `goCave` для виклику `update` та передайте цю нову локацію `cave`. Пам'ятайте, що це третій елемент у вашому масиві `locations`.
+Now that you have a `"cave"` location object, update your `goCave` function to call `update` and pass that new `"cave"` location. Пам'ятайте, що це третій елемент у вашому масиві `locations`.
 
 Не забудьте видалити свій виклик `console.log`!
 
@@ -16,19 +16,19 @@ dashedName: step-71
 Використайте дужкову нотацію, щоб отримати доступ до третього елемента в масиві `locations`.
 
 ```js
-assert.match(code, /locations\[2\]/);
+assert.match(code, /locations\s*\[\s*2\s*\]/);
 ```
 
 Передайте третій елемент у масиві `locations` до `update`.
 
 ```js
-assert.match(code, /update\(locations\[2\]\)/);
+assert.match(code, /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 Ви повинні викликати `update` за допомогою третього елементу у своєму масиві `locations` у функції `goCave`.
 
 ```js
-assert.match(goCave.toString(), /update\(locations\[2\]\)/);
+assert.match(goCave.toString(), /update\(\s*locations\s*\[\s*2\s*\]\s*\)/);
 ```
 
 Вам не потрібна інструкція `console.log` у своїй функції `goCave`.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
index 378ec92531a..5849271d97a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c370ad8c68227137e0bc.md
@@ -7,7 +7,7 @@ dashedName: step-72
 
 # --description--
 
-Тепер, коли ваші локації `store` та `cave` закінчено, ви можете запрограмувати дії, які виконує гравець на них. Всередині функції `buyHealth` встановіть `gold` рівним `gold` мінус `10`.
+Now that your `"store"` and `"cave"` locations are complete, you can code the actions the player takes at those locations. Всередині функції `buyHealth` встановіть `gold` рівним `gold` мінус `10`.
 
 Ось так ви б встановили `num` рівним `5` менше за `num`: `num = num - 5;`.
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
index 68663a48b35..cee9aa7b57b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c465fa7b0c252f4a8f0c.md
@@ -19,7 +19,7 @@ const total = document.querySelector('#total');
 total.innerText = value;
 ```
 
-Це можна перевірити, натиснувши кнопку «Go to store», одразу після кнопки «Buy Health».
+You can test this by clicking your `"Go to store"` button, followed by your `"Buy Health"` button.
 
 **Примітка:** ваша відповідь повинна мати лише два рядки коду.
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
index 104c31558f7..e1fa14d0ae9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c4db0710f3260f867a92.md
@@ -7,17 +7,20 @@ dashedName: step-76
 
 # --description--
 
-Що робити, якщо у гравця недостатньо золота, щоб купити здоров'я? Коли ви хочете умовно запустити код, ви можете використати інструкцію `if`. Помістіть весь код у своїй функції `buyHealth` всередині інструкції `if`. Наприклад:
+Що робити, якщо у гравця недостатньо золота, щоб купити здоров'я? When you want to run code conditionally, you can use the <dfn>if</dfn> statement.
+
+An `if` statement is used to make decisions in code. The keyword `if` is followed by a condition in parentheses. If the condition is true, the code inside the curly braces `{}` is executed. If the condition is false, the code inside the curly braces is skipped.
+
+Here is an example of an `if` statement:
 
 ```js
-function myFunction() {
-  if ("condition") {
-    console.log("Hello World!");
-  }
+const num = 5;
+if (num >= 3) {
+  console.log("This code will run because num is greater than or equal to 3.");
 }
 ```
 
-For now, the `if` statement condition should be set to the string `condition` as a placeholder.
+Start by placing all of the code in your `buyHealth` function inside an `if` statement. For the `if` statement condition, check if `gold` is greater than or equal to `10`.
 
 # --hints--
 
@@ -27,16 +30,16 @@ For now, the `if` statement condition should be set to the string `condition` as
 assert.match(buyHealth.toString(), /if/);
 ```
 
-Ваша інструкція `if` повинна мати рядок `condition` для умови.
+Your `if` statement should check if `gold` is greater than or equal to `10`.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)/);
 ```
 
 Весь ваш код `buyHealth` повинен бути в інструкції `if`.
 
 ```js
-assert.match(buyHealth.toString(), /if\s*\(('|")condition\1\)\s*\{[\s\S]*\}/);
+assert.match(buyHealth.toString(), /if\s*\(\s*gold\s*>=\s*10\s*\)\s*{\s*gold\s*-=\s*10;\s*health\s*\+=\s*10;\s*goldText\.innerText\s*=\s*gold;\s*healthText\.innerText\s*=\s*health;\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
index 0ad3362cc89..d04d95a54a4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c5db7888af27af23f0dd.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c5db7888af27af23f0dd
-title: Step 78
+title: Step 77
 challengeType: 0
-dashedName: step-78
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
index 5b41b6e2d84..7673041e3da 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c65b75664c28a8e59c16.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8c65b75664c28a8e59c16
-title: Step 79
+title: Step 78
 challengeType: 0
-dashedName: step-79
+dashedName: step-78
 ---
 
 # --description--
 
-В інструкції `else` встановіть `text.innerText` на `You do not have enough gold to buy health.`.
+Inside the `else` statement, set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 # --hints--
 
-Ваша функція `buyHealth` повинна встановити `text.innerText` на `You do not have enough gold to buy health.`.
+Your `buyHealth` function should set `text.innerText` to equal `"You do not have enough gold to buy health."`.
 
 ```js
 assert.match(buyHealth.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy health\.\1/);
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
index c2fc6a92d20..3d96eb5efef 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c6815f5f1a29735efe1b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c6815f5f1a29735efe1b
-title: Step 80
+title: Step 79
 challengeType: 0
-dashedName: step-80
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
index d2be2c26ef7..28709032946 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7322e42962ad53ad204.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c7322e42962ad53ad204
-title: Step 81
+title: Step 80
 challengeType: 0
-dashedName: step-81
+dashedName: step-80
 ---
 
 # --description--
 
-Так само як і масив `locations`, ваш масив `weapons` зберігатиме об'єкти. Додайте чотири об'єкти до масиву `weapons`, кожен з двома властивостями: `name` та `power`. Перший повинен мати `name` зі значенням `stick` та `power` зі значенням `5`. Другий повинен бути `dagger` та `30`. Третій: `claw hammer` та `50`. Четвертий: `sword` та `100`.
+Так само як і масив `locations`, ваш масив `weapons` зберігатиме об'єкти. Додайте чотири об'єкти до масиву `weapons`, кожен з двома властивостями: `name` та `power`. The first should have the `name` set to `"stick"` and the `power` set to `5`. The second should be `"dagger"` and `30`. The third, `"claw hammer"` and `50`. The fourth, `"sword"` and `100`.
 
 # --hints--
 
@@ -26,28 +26,28 @@ assert.isObject(weapons[2]);
 assert.isObject(weapons[3]);
 ```
 
-Ваш перший об’єкт `weapons` повинен мати `name` зі значенням `stick` та `power` зі значенням `5`.
+Your first `weapons` object should have the `name` set to `"stick"` and the `power` set to `5`.
 
 ```js
 assert.equal(weapons[0].name, 'stick');
 assert.equal(weapons[0].power, 5);
 ```
 
-Ваш другий об’єкт `weapons` повинен мати `name` зі значенням `dagger` та `power` зі значенням `30`.
+Your second `weapons` object should have the `name` set to `"dagger"` and the `power` set to `30`.
 
 ```js
 assert.equal(weapons[1].name, 'dagger');
 assert.equal(weapons[1].power, 30);
 ```
 
-Ваш третій об’єкт `weapons` повинен мати `name` зі значенням `claw hammer` та `power` зі значенням `50`.
+Your third `weapons` object should have the `name` set to `"claw hammer"` and the `power` set to `50`.
 
 ```js
 assert.equal(weapons[2].name, 'claw hammer');
 assert.equal(weapons[2].power, 50);
 ```
 
-Ваш четвертий об’єкт `weapons` повинен мати `name` зі значенням `sword` та `power` зі значенням `100`.
+Your fourth `weapons` object should have the `name` set to `"sword"` and the `power` set to `100`.
 
 ```js
 assert.equal(weapons[3].name, 'sword');
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
index 44e7b9720e8..ea7eebf683f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c7a59e72c02bb1c717d2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c7a59e72c02bb1c717d2
-title: Step 82
+title: Step 81
 challengeType: 0
-dashedName: step-82
+dashedName: step-81
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.include(buyWeapon.toString(), 'if');
 Ваша інструкція `if` повинна перевіряти, чи значення `gold` більше чи дорівнює `30`.
 
 ```js
-assert.match(buyWeapon.toString(), /if\s*\(gold\s*>=\s*30\)/);
+assert.match(buyWeapon.toString(), /if\s*\(\s*gold\s*>=\s*30\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
index ae66b18975e..2586a9cdc10 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c89e4272512d44fc1c66.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8c89e4272512d44fc1c66
-title: Step 83
+title: Step 82
 challengeType: 0
-dashedName: step-83
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
index 7a1da088f8b..c1a782db96c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8c8cee8e5cf2e001789b4.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8c8cee8e5cf2e001789b4
-title: Step 84
+title: Step 83
 challengeType: 0
-dashedName: step-84
+dashedName: step-83
 ---
 
 # --description--
 
-Значення змінної `currentWeapon` відповідає індексу в масиві `weapons`. Гравець починає із `stick`, оскільки `currentWeapon` розпочинається із `0` та `weapons[0]` є зброєю `stick`.
+Значення змінної `currentWeapon` відповідає індексу в масиві `weapons`. The player starts with a `"stick"`, since `currentWeapon` starts at `0` and `weapons[0]` is the `"stick"` weapon.
 
 У функції `buyWeapon` використайте складене присвоєння, щоб додати `1` до `currentWeapon`: користувач купляє наступну зброю у масиві `weapons`.
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
index 6059f432903..2c7182b3b3c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ca22d29fe62f3952bdf5.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ca22d29fe62f3952bdf5
-title: Step 85
+title: Step 84
 challengeType: 0
-dashedName: step-85
+dashedName: step-84
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
index 7888371772f..60f310cccb4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cb19bd7f8a304e5427a1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8cb19bd7f8a304e5427a1
-title: Step 86
+title: Step 85
 challengeType: 0
-dashedName: step-86
+dashedName: step-85
 ---
 
 # --description--
 
-Тепер оновіть елемент `goldText`, щоб він показував нове значення `gold`, та оновіть елемент `text`, щоб він показував `You now have a new weapon.`.
+Now update the `goldText` element to display the new value of `gold`, and update the `text` element to display `"You now have a new weapon."`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ dashedName: step-86
 assert.match(buyWeapon.toString(), /goldText\.innerText\s*=\s*gold/);
 ```
 
-Ви повинні оновити властивість `innerText` елемента `text` на `You now have a new weapon.`.
+You should update the `innerText` property of the `text` element to be `"You now have a new weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a new weapon\.\1/);
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
index 925e409d8a1..91a479c7c1a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cbd1e3595431d5a2b3f1.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cbd1e3595431d5a2b3f1
-title: Step 87
+title: Step 86
 challengeType: 0
-dashedName: step-87
+dashedName: step-86
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
index 86115a5c132..98c3d1269d2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cce1b0c32c33017cf2e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cce1b0c32c33017cf2e9
-title: Step 88
+title: Step 87
 challengeType: 0
-dashedName: step-88
+dashedName: step-87
 ---
 
 # --description--
@@ -22,7 +22,7 @@ let value = array[index];
 Ви повинні оновити `newWeapon` на значення `weapons[currentWeapon]`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
index e05b7554263..99bf5c1b763 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce1dfc990134162b3bd9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ce1dfc990134162b3bd9
-title: Step 89
+title: Step 88
 challengeType: 0
-dashedName: step-89
+dashedName: step-88
 ---
 
 # --description--
@@ -14,7 +14,7 @@ dashedName: step-89
 Ви повинні оновити `newWeapon` на значення `weapons[currentWeapon].name`.
 
 ```js
-assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\[currentWeapon\]\.name;/);
+assert.match(buyWeapon.toString(), /newWeapon\s*=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
index 6e827a5ee3c..b06fff17fa2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ce73d0dce43468f6689c.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8ce73d0dce43468f6689c
-title: Step 90
+title: Step 89
 challengeType: 0
-dashedName: step-90
+dashedName: step-89
 ---
 
 # --description--
 
-Ви можете вставити змінні в рядок за допомогою <dfn>оператора конкатенації</dfn> `+`. Оновіть рядок `You now have a new weapon.` на `You now have a` та назву нової зброї. Не забудьте поставити крапку в кінці речення.
+Ви можете вставити змінні в рядок за допомогою <dfn>оператора конкатенації</dfn> `+`. Update the `"You now have a new weapon."` string to say `"You now have a "` and the name of the new weapon. Не забудьте поставити крапку в кінці речення.
 
-Ось приклад, який створює рядок `Hello, our name is freeCodeCamp.`:
+Here is an example that creates the string `"Hello, our name is freeCodeCamp."`:
 
 ```js
 const ourName = "freeCodeCamp";
@@ -18,7 +18,7 @@ const ourStr = "Hello, our name is " + ourName + ".";
 
 # --hints--
 
-Ви повинні оновити присвоювання `text.innerText`, щоб воно починалося з рядка `You now have a`.
+You should update the `text.innerText` assignment to start with the string `"You now have a "`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You now have a \1/);
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
index 1788e16d2ef..0018fb18231 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8cf22272d6d35af80d4ac.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8cf22272d6d35af80d4ac
-title: Step 91
+title: Step 90
 challengeType: 0
-dashedName: step-91
+dashedName: step-90
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
index 7857a0eb1a5..e5ffaa22284 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0337d7c67377a4a76c6.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d0337d7c67377a4a76c6
-title: Step 92
+title: Step 91
 challengeType: 0
-dashedName: step-92
+dashedName: step-91
 ---
 
 # --description--
 
 До цього моменту старий текст видалявся, коли `text.innerText` оновлювався. Цього разу скористайтеся оператором `+=`, щоб додати текст у кінець `text.innerText`.
 
-Додайте рядок `In your inventory you have:`, не забудьте пробіли спочатку та вкінці.
+Add the string `" In your inventory you have: "` - include the spaces at the beginning and the end.
 
 # --hints--
 
@@ -26,7 +26,7 @@ assert.lengthOf(matches, 2);
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*/)
 ```
 
-Ви повинні додати рядок `In your inventory you have:` в кінець `text.innerText`. Пам’ятайте про пробіли!
+You should add the string `" In your inventory you have: "` to the end of `text.innerText`. Пам’ятайте про пробіли!
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
index 9e0e906627b..83df39ff9a0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d08668fa8b38732486e9.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d08668fa8b38732486e9
-title: Step 93
+title: Step 92
 challengeType: 0
-dashedName: step-93
+dashedName: step-92
 ---
 
 # --description--
@@ -11,7 +11,7 @@ dashedName: step-93
 
 # --hints--
 
-Ви не повинні змінювати рядок `In your inventory you have:`.
+You should not change the `" In your inventory you have: "` string.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*\+=\s*('|")\sIn your inventory you have:\s\1/)
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
index 9c28a93e306..6171c5425e9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0c4f12c2239b6618582.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d0c4f12c2239b6618582
-title: Step 94
+title: Step 93
 challengeType: 0
-dashedName: step-94
+dashedName: step-93
 ---
 
 # --description--
 
-Додайте інструкцію `else` до своєї функції `buyWeapon`. У цій інструкції встановіть `text.innerText` рівним `You do not have enough gold to buy a weapon.`.
+Додайте інструкцію `else` до своєї функції `buyWeapon`. In that statement, set `text.innerText` to equal `"You do not have enough gold to buy a weapon."`.
 
 # --hints--
 
@@ -24,13 +24,13 @@ const split = buyWeapon.toString().split(/\s|\n/);
 assert.isAbove(split.indexOf('else'), split.indexOf('if'));
 ```
 
-Ви повинні встановити `text.innerText` на `You do not have enough gold to buy a weapon.`.
+You should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 assert.match(buyWeapon.toString(), /text\.innerText\s*=\s*('|")You do not have enough gold to buy a weapon.\1/);
 ```
 
-Ваша інструкція `else` повинна встановити `text.innerText` на `You do not have enough gold to buy a weapon.`.
+Your `else` statement should set `text.innerText` to `"You do not have enough gold to buy a weapon."`.
 
 ```js
 gold = 20;
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
index 768c1ea25c5..77b390ba0f3 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d0fdf2dad83a92883a80.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d0fdf2dad83a92883a80
-title: Step 95
+title: Step 94
 challengeType: 0
-dashedName: step-95
+dashedName: step-94
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
index c2f7cf4f3ff..e474edb271b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d143f2a58e3b6d6e9c33.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d143f2a58e3b6d6e9c33
-title: Step 96
+title: Step 95
 challengeType: 0
-dashedName: step-96
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
index 87e6584c21e..53ee1da1152 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d1c72e8bb13c2074d93c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d1c72e8bb13c2074d93c
-title: Step 97
+title: Step 96
 challengeType: 0
-dashedName: step-97
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
index ab18c92d161..ef8da9187a7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2146a3e853d0a6e28ca.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d2146a3e853d0a6e28ca
-title: Step 98
+title: Step 97
 challengeType: 0
-dashedName: step-98
+dashedName: step-97
 ---
 
 # --description--
 
-Додайте інструкцію `else` до своєї зовнішньої інструкції `if`. Всередині цієї нової інструкції `else` встановіть `text.innerText` на `You already have the most powerful weapon!`.
+Додайте інструкцію `else` до своєї зовнішньої інструкції `if`. Inside this new `else` statement, set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 # --hints--
 
@@ -18,13 +18,13 @@ const matches = buyWeapon.toString().match(/else/g);
 assert.equal(matches.length, 2);
 ```
 
-Ви повинні встановити `text.innerText` на `You already have the most powerful weapon!`.
+You should set `text.innerText` to `"You already have the most powerful weapon!"`.
 
 ```js
 assert.match(buyWeapon.toString(), /('|")You already have the most powerful weapon!\1/);
 ```
 
-Ви повинні змінити свій `text.innerText` на `You already have the most powerful weapon!` у своїй зовнішній інструкції `else`.
+You should modify your `text.innerText` to `"You already have the most powerful weapon!"` within your outer `else` statement.
 
 ```js
 currentWeapon = 5;
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
index 6ac577d4cc0..f12ad13366d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d24c97461b3ddb9397c8.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d24c97461b3ddb9397c8
-title: Step 99
+title: Step 98
 challengeType: 0
-dashedName: step-99
+dashedName: step-98
 ---
 
 # --description--
 
 Як тільки гравець отримає найпотужнішу зброю, ви можете дати йому можливість продати стару.
 
-У зовнішній інструкції `else` встановіть `button2.innerText` на `Sell weapon for 15 gold`. Також встановіть `button2.onclick` на назву функції `sellWeapon`.
+In the outer `else` statement, set `button2.innerText` to `"Sell weapon for 15 gold"`. Також встановіть `button2.onclick` на назву функції `sellWeapon`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ dashedName: step-99
 assert.match(buyWeapon.toString(), /button2\.innerText/);
 ```
 
-Ви повинні встановити значення `button2.innerText` на `Sell weapon for 15 gold`.
+You should set the value of `button2.innerText` to `"Sell weapon for 15 gold"`.
 
 ```js
 assert.match(buyWeapon.toString(), /button2\.innerText\s*=\s*('|")Sell weapon for 15 gold\1;/);
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
index 5320945f0d0..661c26ce39f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d2e2a073be3edb46116f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d2e2a073be3edb46116f
-title: Step 100
+title: Step 99
 challengeType: 0
-dashedName: step-100
+dashedName: step-99
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.isFunction(sellWeapon);
 `sellWeapon` має бути порожньою функцією.
 
 ```js
-assert.match(sellWeapon.toString(), /sellWeapon\(\)\s*\{\s*\}/);
+assert.match(sellWeapon.toString(), /sellWeapon\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
index 2004706e3e0..eafb8ba6fdf 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d31ebbc10e3fe1b28e03.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d31ebbc10e3fe1b28e03
-title: Step 101
+title: Step 100
 challengeType: 0
-dashedName: step-101
+dashedName: step-100
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(sellWeapon.toString(), /if/);
 Ваша інструкція `if` повинна перевіряти, чи `inventory.length` більше за `1`.
 
 ```js
-assert.match(sellWeapon.toString(), /if\s*\(inventory\.length\s*>\s*1\)/);
+assert.match(sellWeapon.toString(), /if\s*\(\s*inventory\.length\s*>\s*1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
index 78fd90fd2e2..6f6924fb8a7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d35660db4040ba292193.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d35660db4040ba292193
-title: Step 102
+title: Step 101
 challengeType: 0
-dashedName: step-102
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
index b4cb5ca57d6..f842662fff8 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d382cd075f4169223e14.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d382cd075f4169223e14
-title: Step 103
+title: Step 102
 challengeType: 0
-dashedName: step-103
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
index 6d61979a6e0..0ff133d30e3 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d539dc11cb42b5dd7ec8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8d539dc11cb42b5dd7ec8
-title: Step 104
+title: Step 103
 challengeType: 0
-dashedName: step-104
+dashedName: step-103
 ---
 
 # --description--
@@ -21,19 +21,19 @@ Use the `shift()` method to take the first element from the `inventory` array an
 Ваша функція `sellWeapon` повинна використовувати метод `shift()`.
 
 ```js
-assert.match(sellWeapon.toString(), /shift\(\)/);
+assert.match(sellWeapon.toString(), /shift\(\s*\)/);
 ```
 
 Ви повинні використати метод `shift()` для масиву `inventory`.
 
 ```js
-assert.match(sellWeapon.toString(), /inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /inventory\.shift\(\s*\)/);
 ```
 
 Ви повинні присвоїти значення `inventory.shift()` своїй змінній `currentWeapon`.
 
 ```js
-assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\)/);
+assert.match(sellWeapon.toString(), /currentWeapon\s*=\s*inventory\.shift\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
index ba85cffe74c..923fc895107 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d61ddfe35744369365b7.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d61ddfe35744369365b7
-title: Step 105
+title: Step 104
 challengeType: 0
-dashedName: step-105
+dashedName: step-104
 ---
 
 # --description--
 
-Після свого `currentWeapon` скористайтеся оператором конкатенації, щоб встановити `text.innerText` на рядок `You sold a`, потім `currentWeapon`, а потім рядок `.`.
+After your `currentWeapon`, use the concatenation operator to set `text.innerText` to the string `"You sold a "`, then `currentWeapon`, then the string `"."`.
 
 # --hints--
 
@@ -17,19 +17,19 @@ dashedName: step-105
 assert.match(sellWeapon.toString(), /text\.innerText\s*=/);
 ```
 
-Ви повинні додати `You sold a` до `text.innerText`. Інтервал важливий.
+You should add `"You sold a "` to `text.innerText`. Інтервал важливий.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1/);
 ```
 
-Ви повинні додати значення `currentWeapon` до рядка `You sold a`. Використайте оператор конкатенації, щоб зробити це в тому самому рядку.
+You should add the value of `currentWeapon` to the `"You sold a "` string. Використайте оператор конкатенації, щоб зробити це в тому самому рядку.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a\s\1\s*\+\s*\_currentWeapon/);
 ```
 
-Ви повинні додати рядок `.` до значення `currentWeapon`. Використайте оператор конкатенації, щоб зробити це в тому самому рядку.
+You should add the string `"."` to the value of `currentWeapon`. Використайте оператор конкатенації, щоб зробити це в тому самому рядку.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")You sold a \1\s*\+\s*\_currentWeapon\s+\+\s+('|")\.\2/);
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
index 34e5da113a7..e110e1e0ec6 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d6c7001ebc45350e3d16.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d6c7001ebc45350e3d16
-title: Step 106
+title: Step 105
 challengeType: 0
-dashedName: step-106
+dashedName: step-105
 ---
 
 # --description--
 
-Тепер скористайтеся оператором `+=`, щоб додати рядок `In your inventory you have:` та вміст `inventory` до `text.innerText`. Обов’язково додайте пробіл на початку та в кінці рядка `In your inventory you have:`.
+Now use the `+=` operator to add the string `" In your inventory you have: "` and the contents of `inventory` to the `text.innerText`. Make sure to include the space at the beginning and end of the `" In your inventory you have: "` string.
 
 # --hints--
 
@@ -25,7 +25,7 @@ const matches = sellWeapon.toString().match(/text\.innerText\s*\+=/g);
 assert.equal(matches.length, 1);
 ```
 
-Ви повинні додати рядок `In your inventory you have:` до другого рядка `text.innerText`. Інтервал має значення.
+You should add the string `" In your inventory you have: "` to the second `text.innerText` line. Інтервал має значення.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*\+=\s*('|") In your inventory you have: \1/);
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
index 64d975d0c7e..fd65c77313a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d7b8ab568b4649998954.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8d7b8ab568b4649998954
-title: Step 107
+title: Step 106
 challengeType: 0
-dashedName: step-107
+dashedName: step-106
 ---
 
 # --description--
 
-Використайте інструкцію `else` для запуску, коли довжина `inventory` не більша одиниці. Встановіть `text.innerText` на `Don't sell your only weapon!`.
+Використайте інструкцію `else` для запуску, коли довжина `inventory` не більша одиниці. Set the `text.innerText` to say `"Don't sell your only weapon!"`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ dashedName: step-107
 assert.match(sellWeapon.toString(), /else/);
 ```
 
-Ви повинні встановити `text.innerText` на `Don't sell your only weapon!`.
+You should set `text.innerText` to `"Don't sell your only weapon!"`.
 
 ```js
 assert.match(sellWeapon.toString(), /text\.innerText\s*=\s*('|")Don't sell your only weapon!\1/);
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
index 16110cf3580..10864a3f517 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8d81f539f004776dd9b1e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8d81f539f004776dd9b1e
-title: Step 108
+title: Step 107
 challengeType: 0
-dashedName: step-108
+dashedName: step-107
 ---
 
 # --description--
 
 Тепер ви можете розпочати код для боротьби з монстрами. Щоб код був організованим, ваша функція `fightDragon` була переміщена, щоб бути ближче до інших функцій `fight`.
 
-Під своїм масивом `weapons` визначте змінну `monsters` та призначте їй масив. Масив повинен мати три об'єкти, кожен із властивостями `name`, `level` та `health`. Значеннями першого об'єкту повинні бути `slime`, `2` та `15`, за порядком. Значення другого: `fanged beast`, `8` та `60`. Значення третього: `dragon`, `20` та `300`.
+Під своїм масивом `weapons` визначте змінну `monsters` та призначте їй масив. Масив повинен мати три об'єкти, кожен із властивостями `name`, `level` та `health`. The first object's values should be `"slime"`, `2`, and `15`, in order. The second should be `"fanged beast"`, `8`, and `60`. The third should be `"dragon"`, `20`, and `300`.
 
 # --hints--
 
@@ -37,7 +37,7 @@ assert.lengthOf(monsters, 3);
 assert(monsters.every(val => typeof val === "object"));
 ```
 
-Перше значення у вашому масиві `monsters` повинне бути об'єктом з властивістю `name` зі значенням `slime`.
+The first value in your `monsters` array should be an object with a `name` property set to `"slime"`.
 
 ```js
 assert.equal(monsters[0].name, "slime");
@@ -55,7 +55,7 @@ assert.equal(monsters[0].level, 2);
 assert.equal(monsters[0].health, 15);
 ```
 
-Друге значення у вашому масиві `monsters` повинне бути об'єктом з властивістю `name` зі значенням `fanged beast`.
+The second value in your `monsters` array should be an object with a `name` property set to `"fanged beast"`.
 
 ```js
 assert.equal(monsters[1].name, "fanged beast");
@@ -73,7 +73,7 @@ assert.equal(monsters[1].level, 8);
 assert.equal(monsters[1].health, 60);
 ```
 
-Третє значення у вашому масиві `monsters` повинне бути об'єктом з властивістю `name` зі значенням `dragon`.
+The third value in your `monsters` array should be an object with a `name` property set to `"dragon"`.
 
 ```js
 assert.equal(monsters[2].name, "dragon");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
index 5ae5f907f69..a11e16e7b98 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd468debb449b4454086.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd468debb449b4454086
-title: Step 109
+title: Step 108
 challengeType: 0
-dashedName: step-109
+dashedName: step-108
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
index 341acfbbf5b..54a41937daa 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dd9cdb16324b04cfd958.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8dd9cdb16324b04cfd958
-title: Step 110
+title: Step 109
 challengeType: 0
-dashedName: step-110
+dashedName: step-109
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.notMatch(fightSlime.toString(), /let|const/);
 Ви повинні викликати функцію `goFight`.
 
 ```js
-assert.match(fightSlime.toString(), /goFight\(\);/);
+assert.match(fightSlime.toString(), /goFight\(\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
index e8a29ce89a4..e5b404d1b2e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8dfcf7fb1044d2f478fd1.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8dfcf7fb1044d2f478fd1
-title: Step 111
+title: Step 110
 challengeType: 0
-dashedName: step-111
+dashedName: step-110
 ---
 
 # --description--
 
-Дотримуючись того самого шаблону, використайте цей код у функціях `fightBeast` та `fightDragon`. Пам’ятайте, що `beast` знаходиться під індексом `1`, а `dragon` – під індексом `2`. Також видаліть виклик `console.log` зі своєї функції `fightDragon`.
+Following the same pattern as the `fightSlime` function, use that code in the `fightBeast` and `fightDragon` functions. Пам’ятайте, що `beast` знаходиться під індексом `1`, а `dragon` – під індексом `2`. Також видаліть виклик `console.log` зі своєї функції `fightDragon`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
index 5694825db94..67cfc342b3c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e0d1d0110b4ec421489f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e0d1d0110b4ec421489f
-title: Step 112
+title: Step 111
 challengeType: 0
-dashedName: step-112
+dashedName: step-111
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
index 56fe6142f52..0136a589240 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e142f7f0bd4fed898de3.md
@@ -1,20 +1,19 @@
 ---
 id: 62a8e142f7f0bd4fed898de3
-title: Step 113
+title: Step 112
 challengeType: 0
-dashedName: step-113
+dashedName: step-112
 ---
 
 # --description--
 
-Додайте новий об’єкт в кінець масиву `locations`, дотримуючись тих самих властивостей, що й в інших об’єктів. Встановіть `name` на `fight`, `button text` на масив із `Attack`, `Dodge` і `Run`, `button functions` на масив із `attack`, `dodge` і `goTown` та `text` на `You are fighting a monster.`.
+Додайте новий об’єкт в кінець масиву `locations`, дотримуючись тих самих властивостей, що й в інших об’єктів. Set `name` to `"fight"`, `"button text"` to an array with `"Attack"`, `"Dodge"`, and `"Run"`, `"button functions"` to an array with `attack`, `dodge`, and `goTown`, and `text` to `"You are fighting a monster."`.
 
 # --hints--
 
 Ваш масив `locations` повинен містити 4 значення.
 
 ```js
-console.log(locations);
 assert.lengthOf(locations, 4);
 ```
 
@@ -24,25 +23,25 @@ assert.lengthOf(locations, 4);
 assert.isObject(locations[3]);
 ```
 
-Ваш новий об’єкт повинен мати властивість `name` зі значенням `fight`.
+Your new object should have a `name` property set to `"fight"`.
 
 ```js
 assert.equal(locations[3].name, "fight");
 ```
 
-Новий об’єкт повинен мати властивість `button text` зі значенням масиву з рядками `Attack`, `Dodge` та `Run`.
+Your new object should have a `"button text"` property set to an array with the strings `"Attack"`, `"Dodge"`, and `"Run"`.
 
 ```js
 assert.deepEqual(locations[3]["button text"], ["Attack", "Dodge", "Run"]);
 ```
 
-Новий об’єкт повинен мати властивість `button functions` зі значенням масиву зі змінними `attack`, `dodge` та `goTown`.
+Your new object should have a `"button functions"` property set to an array with the variables `attack`, `dodge`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[3]["button functions"], [attack, dodge, goTown]);
 ```
 
-Ваш новий об’єкт повинен мати властивість `text` зі значенням `You are fighting a monster.`.
+Your new object should have a `text` property set to `"You are fighting a monster."`.
 
 ```js
 assert.equal(locations[3].text, "You are fighting a monster.");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
index de48c96af55..29572da1cae 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e1dc897df55108bcb5e8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e1dc897df55108bcb5e8
-title: Step 114
+title: Step 113
 challengeType: 0
-dashedName: step-114
+dashedName: step-113
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(goFight.toString(), /update/);
 Передайте четвертий об’єкт у масиві `locations` до виклику `update`.
 
 ```js
-assert.match(goFight.toString(), /update\(locations\[3\]\)/);
+assert.match(goFight.toString(), /update\(\s*locations\s*\[\s*3\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
index b99e0dd7a0d..9b53ff5230c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e21398ad61520edb724f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e21398ad61520edb724f
-title: Step 115
+title: Step 114
 challengeType: 0
-dashedName: step-115
+dashedName: step-114
 ---
 
 # --description--
@@ -14,13 +14,13 @@ dashedName: step-115
 Ви повинні використати дужкову нотацію, щоб отримати доступ до масиву `monsters` за індексом `fighting`.
 
 ```js
-assert.match(goFight.toString(), /monsters\[fighting\]/);
+assert.match(goFight.toString(), /monsters\s*\[\s*fighting\s*\]/);
 ```
 
 Ви повинні присвоїти значення `monsters[fighting]` змінній `monsterHealth`.
 
 ```js
-assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\[fighting\](\.health|\[('|")health\2\])/);
+assert.match(goFight.toString(), /monsterHealth\s*=\s*monsters\s*\[\s*fighting\s*\]\s*(\.health|\[\s*('|")health\2\s*\])/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
index 0f170067098..185ec113ccd 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e24c673b075317cc0b09.md
@@ -1,18 +1,25 @@
 ---
 id: 62a8e24c673b075317cc0b09
-title: Step 116
+title: Step 115
 challengeType: 0
-dashedName: step-116
+dashedName: step-115
 ---
 
 # --description--
 
-HTML-елемент, який показує статистику монстра, був прихований за допомогою CSS. Щоб показати елемент `monsterStats`, оновіть властивість `display` властивості `style` на `block`. Наприклад, якщо оновити властивість `first` властивості `name` об'єкта `user`, то вигляд буде такий:
+By default, the HTML element that shows the monster's stats has been hidden with CSS. When the player clicks the "Fight dragon" button, the monster's stats should be displayed. You can accomplish this by using the <dfn>style</dfn> and <dfn>display</dfn> properties on the `monsterStats` element.
+
+The `style` property is used to access the inline style of an element and the `display` property is used to set the visibility of an element.
+
+Here is an example of how to update the display for a paragraph element:
 
 ```js
-user.name.first = "Naomi";
+const paragraph = document.querySelector('p');
+paragraph.style.display = 'block';
 ```
 
+Щоб показати елемент `monsterStats`, оновіть властивість `display` властивості `style` на `block`.
+
 # --hints--
 
 Ви повинні використати крапкову нотацію, щоб отримати доступ до властивості `style` для `monsterStats`.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
index f7222da355d..fde41870e9c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e271f8e3d1541f9624ad.md
@@ -1,13 +1,15 @@
 ---
 id: 62a8e271f8e3d1541f9624ad
-title: Step 117
+title: Step 116
 challengeType: 0
-dashedName: step-117
+dashedName: step-116
 ---
 
 # --description--
 
-Тепер встановіть властивість `innerText` об’єкта `monsterName` на властивість `name` поточного монстра. Зробіть те саме для `monsterHealthText` та властивості `health`.
+Now, you will need to update the text for the current monster's name and health.
+
+Start by assigning `monsters[fighting].name` to the `innerText` property of `monsterName`. Then, assign `monsterHealth` to the `innerText` property of `monsterHealthText`.
 
 # --hints--
 
@@ -17,22 +19,22 @@ dashedName: step-117
 assert.match(goFight.toString(), /monsterName\.innerText/);
 ```
 
-Ви повинні встановити властивість `innerText` об'єкта `monsterName` на значення `name` поточного монстра. Це можна зробити за допомогою `monsters[fighting]`.
+You should assign `monsters[fighting].name` to `monsterName.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\[fighting\]\.name/);
+assert.match(goFight.toString(), /monsterName\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
-Ви повинні використати крапкову нотацію, щоб отримати доступ до властивості `innerText` об'єкта `monsterHealthText`.
+You should use dot notation to access the `innerText` property of `monsterHealthText`.
 
 ```js
 assert.match(goFight.toString(), /monsterHealthText\.innerText/);
 ```
 
-Ви повинні встановити властивість `innerText` об'єкта `monsterHealthText` на значення `health` поточного монстра. You can get the current monster with `monsters[fighting]` or you can access this value using the `monsterHealth` variable that you previously assigned.
+You should assign `monsterHealth` to `monsterHealthText.innerText`.
 
 ```js
-assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\[fighting\]\.health/);
+assert.match(goFight.toString(), /monsterHealthText\.innerText\s*=\s*monsterHealth|monsterHealthText\.innerText\s*=\s*monsters\s*\[\s*fighting\s*\]\s*\.health/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
index 6de0df69c1a..44303df85c4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e35675c18c56354c08cf.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e35675c18c56354c08cf
-title: Step 118
+title: Step 117
 challengeType: 0
-dashedName: step-118
+dashedName: step-117
 ---
 
 # --description--
 
-Тепер ви можете побудувати функцію `attack`. First, update the `text` message to say `The <monster name> attacks.`, replacing `<monster name>` with the name of the monster. Не забудьте, що ви можете використати оператор конкатенації для цього.
+Тепер ви можете побудувати функцію `attack`. First, update the `text` message to say `"The <monster name> attacks."`, replacing `<monster name>` with the name of the monster. Не забудьте, що ви можете використати оператор конкатенації для цього.
 
 # --hints--
 
@@ -26,13 +26,13 @@ assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1/);
 Ви повинні використати оператор конкатенації, щоб додати значення `monsters[fighting].name` до рядка `The`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 Ви повинні використати оператор конкатенації, щоб додати рядок `attacks.` до рядка `monsters[fighting].name`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\[fighting\]\.name\s*\+\s*('|") attacks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*=\s*('|")The \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name\s*\+\s*('|") attacks\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
index ccbc3724b14..04814bca989 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e41e2f190c58404dd46e.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8e41e2f190c58404dd46e
-title: Step 119
+title: Step 118
 challengeType: 0
-dashedName: step-119
+dashedName: step-118
 ---
 
 # --description--
 
-On a new line, add the string `You attack it with your <weapon>.` to the `text` value, replacing `<weapon>` with the player's current weapon.
+On a new line, use the addition assignment operator(`+=`), to add the string `" You attack it with your <weapon>."` to the `text` value, replacing `<weapon>` with the player's current weapon. Additionally, remember that this line of text starts with a space so it will properly display.
 
 # --hints--
 
@@ -24,7 +24,7 @@ assert.lengthOf(match, 2);
 assert.match(attack.toString(), /text\.innerText\s*\+=/);
 ```
 
-Ви повинні додати рядок `You attack it with your` до значення `text.innerText`. Пам'ятайте, що інтервал має значення.
+You should add the string `" You attack it with your "` to the `text.innerText` value. Пам'ятайте, що інтервал має значення.
 
 ```js
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1/);
@@ -33,13 +33,13 @@ assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it wit
 Ви повинні використати оператор конкатенації, щоб додати поточну зброю до рядка. Поточну зброю можна отримати за допомогою `weapons[currentWeapon].name`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name/);
 ```
 
-Ви повинні використати оператор конкатенації, щоб закінчити рядок з `.`.
+You should use the concatenation operator to end your string with `"."`.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\[currentWeapon\]\.name\s*\+\s*('|")\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|") You attack it with your \1\s*\+\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.name\s*\+\s*('|")\.\2/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
index fd9fdb0de05..d6823181983 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e45cc600c3591cee671a.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8e45cc600c3591cee671a
-title: Step 120
+title: Step 119
 challengeType: 0
-dashedName: step-120
+dashedName: step-119
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(attack.toString(), /health\s*-=/);
 Ви повинні відняти поточний рівень монстра від `health`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*monsters\[fighting\]\.level/);
+assert.match(attack.toString(), /health\s*-=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
index 25927634462..ac76865ed0a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e49f4df7af5ae2d7a616.md
@@ -1,38 +1,40 @@
 ---
 id: 62a8e49f4df7af5ae2d7a616
-title: Step 121
+title: Step 120
 challengeType: 0
-dashedName: step-121
+dashedName: step-120
 ---
 
 # --description--
 
-Встановіть `monsterHealth` на `monsterHealth` мінус потужність поточної зброї гравця. Пам'ятайте, що ви маєте змінну `currentWeapon` та властивість `power`.
+Set `monsterHealth` to `monsterHealth` minus the power of the player's current weapon.
+
+Remember that you can access the power of the player's current weapon using `weapons[currentWeapon].power`.
 
 # --hints--
 
-Ви повинні використати складене присвоювання, щоб змінити змінну `monsterHealth`.
+You should use compound assignment to modify the `monsterHealth` variable.
 
 ```js
 assert.match(attack.toString(), /monsterHealth\s*-=/);
 ```
 
-Ви повинні використати дужкову нотацію із `currentWeapon`, щоб отримати доступ до `weapons`.
+You should use bracket notation with `currentWeapon` to access `weapons`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]/);
 ```
 
-Ви повинні використати крапкову нотацію, щоб отримати доступ до властивості `power` об'єкта `weapons[currentWeapon]`.
+You should use dot notation to access the `power` property of `weapons[currentWeapon]`.
 
 ```js
-assert.match(attack.toString(), /weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
-Ви повинні відняти `power` поточної зброї від `monsterHealth`.
+You should subtract the `power` of the current weapon from `monsterHealth`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
index d58a8f51018..e12b40e63d1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8e4dc6a60f85bf256a0cb.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8e4dc6a60f85bf256a0cb
-title: Step 122
+title: Step 121
 challengeType: 0
-dashedName: step-122
+dashedName: step-121
 ---
 
 # --description--
 
 The `Math` object in JavaScript contains static properties and methods for mathematical constants and functions. One of those is `Math.random()`, which generates a random number from `0` (inclusive) to `1` (exclusive). Іншим є `Math.floor()`, яке заокруглює задане число до найближчого цілого числа.
 
-З їх використанням ви можете згенерувати випадкове число в межах діапазону. Наприклад, це генерує випадкове число від 1 до 5: `Math.floor(Math.random() * 5) + 1;`.
+З їх використанням ви можете згенерувати випадкове число в межах діапазону. For example, this generates a random number between `1` and `5`: `Math.floor(Math.random() * 5) + 1;`.
 
 Following this pattern, use the addition operator (`+`) to add a random number between `1` and the value of `xp` to your `monsterHealth -= weapons[currentWeapon].power`.
 
@@ -24,7 +24,7 @@ assert.lengthOf(attack.toString().match(/monsterHealth/g), 1);
 Ви повинні додати до значення `weapons[currentWeapon].power`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+/);
 ```
 
 Ви повинні використати `Math.floor()`.
@@ -42,25 +42,25 @@ assert.match(attack.toString(), /Math\.random/);
 Ви повинні помножити `Math.random()` на значення `xp`.
 
 ```js
-assert.match(attack.toString(), /Math\.random\(\)\s*\*\s*xp/);
+assert.match(attack.toString(), /Math\.random\(\s*\)\s*\*\s*xp/);
 ```
 
 Ви повинні використати `Math.floor()`, щоб заокруглити результат `Math.random() * xp`.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\)\s*\*\s*xp\s*.*\)/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*.*\)/);
 ```
 
 Ви повинні додати `1` до результату `Math.floor()`.
 
 ```js
-assert.match(attack.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 Ви повинні додати результат `Math.floor(Math.random() * xp) + 1` до результату `weapons[currentWeapon].power`.
 
 ```js
-assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp(?:\s*\+\s*1)?\)(?:\s*\+ 1)?/);
+assert.match(attack.toString(), /monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp(?:\s*\+\s*1)?\s*\)(?:\s*\+ 1)?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
index 22500aea2e3..9da24fbc9e1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ed36d7a7915dfa444ba2.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ed36d7a7915dfa444ba2
-title: Step 123
+title: Step 122
 challengeType: 0
-dashedName: step-123
+dashedName: step-122
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
index 8876968305d..34745881ab5 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8edd05e27cc668051686f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8edd05e27cc668051686f
-title: Step 124
+title: Step 123
 challengeType: 0
-dashedName: step-124
+dashedName: step-123
 ---
 
 # --description--
@@ -20,13 +20,13 @@ assert.match(attack.toString(), /if/);
 Ваша інструкція `if` повинна перевіряти, чи `health` менше чи дорівнює `0`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(health\s*<=\s*0\)/);
+assert.match(attack.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 ```
 
 Ваша інструкція `if` повинна викликати функцію `lose`.
 
 ```js
-assert.match(attack.toString(), /lose\(\)/);
+assert.match(attack.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
index 5fee7c173ca..0045070bb79 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee154c8946678775c4a4.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee154c8946678775c4a4
-title: Step 125
+title: Step 124
 challengeType: 0
-dashedName: step-125
+dashedName: step-124
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
index 64d4ade9f35..eae9f8157be 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ee71f018e968a056d369.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ee71f018e968a056d369
-title: Step 126
+title: Step 125
 challengeType: 0
-dashedName: step-126
+dashedName: step-125
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(code, /function\s+defeatMonster/);
 `defeatMonster` має бути порожньою функцією.
 
 ```js
-assert.match(defeatMonster.toString(), /defeatMonster\s*\(\)\s*\{\s*\}/);
+assert.match(defeatMonster.toString(), /defeatMonster\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 Використайте ключове слово `function`, щоб оголосити `lose`.
@@ -32,7 +32,7 @@ assert.match(code, /function\s+lose/);
 `lose` має бути порожньою функцією.
 
 ```js
-assert.match(lose.toString(), /lose\s*\(\)\s*\{\s*\}/);
+assert.match(lose.toString(), /lose\s*\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
index 2762877d304..546b48ea115 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eec45f77bc69e8775294.md
@@ -1,17 +1,17 @@
 ---
 id: 62a8eec45f77bc69e8775294
-title: Step 127
+title: Step 126
 challengeType: 0
-dashedName: step-127
+dashedName: step-126
 ---
 
 # --description--
 
-Inside the `dodge` function, set `text.innerText` equal to the string `You dodge the attack from the <monster>`. Replace `<monster>` with the name of the monster, using the `name` property.
+Inside the `dodge` function, set `text.innerText` equal to the string `"You dodge the attack from the <monster>"`. Replace `<monster>` with the name of the monster, using the `name` property.
 
 # --hints--
 
-Ви повинні присвоїти рядок `You dodge the attack from the` до властивості `text.innerText`. Пам'ятайте, що інтервал має значення.
+You should assign the string `"You dodge the attack from the "` to the `text.innerText` property. Пам'ятайте, що інтервал має значення.
 
 ```js
 assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1/);
@@ -20,7 +20,7 @@ assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack
 Ви повинні використати оператор конкатенації, щоб додати назву монстра в кінець рядка. You can get this with `monsters[fighting].name`.
 
 ```js
-assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\[fighting\]\.name/);
+assert.match(dodge.toString(), /text\.innerText\s*=\s*('|")You dodge the attack from the \1\s*\+\s*monsters\s*\[\s*fighting\s*\]\s*\.name/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
index 610eb387fa8..c8253c81f72 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eefe2e68b66ac563816b.md
@@ -1,13 +1,13 @@
 ---
 id: 62a8eefe2e68b66ac563816b
-title: Step 128
+title: Step 127
 challengeType: 0
-dashedName: step-128
+dashedName: step-127
 ---
 
 # --description--
 
-У своїй функції `defeatMonster` встановіть `gold` на `gold` плюс рівень монстра, помножений на `6.7`. Рівень монстра можна отримати за допомогою властивості `level`.
+У своїй функції `defeatMonster` встановіть `gold` на `gold` плюс рівень монстра, помножений на `6.7`. Remember you can get the monster's level by using `monsters[fighting].level`.
 
 Ось приклад встановлення `num` на `num` плюс `5` * `8`: `num += 5 * 8`. Використайте `Math.floor()`, щоб заокруглити результат.
 
@@ -22,13 +22,13 @@ assert.match(defeatMonster.toString(), /gold\s*\+=/);
 Ви повинні використати `Math.floor()`, щоб заокруглити результат множення рівня монстра на `6.7`.
 
 ```js
-assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /(Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\))/);
 ```
 
 You should add the result of `Math.floor(monsters[fighting].level * 6.7)` to `gold`.
 
 ```js
-assert.match(defeatMonster.toString(), /gold\s*\+=\s*(Math\.floor\(\s*monsters\[fighting\]\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\[fighting\]\.level\s*\))/);
+assert.match(defeatMonster.toString(), /gold\s*\+=\s*((Math\.floor\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\*\s*6\.7\s*\))|(Math\.floor\(\s*6\.7\s*\*\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)))/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
index 7fabfa5bacc..d1f8c17d067 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef6a52292f6bdca4f6f8.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef6a52292f6bdca4f6f8
-title: Step 129
+title: Step 128
 challengeType: 0
-dashedName: step-129
+dashedName: step-128
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /xp\s*\+=/);
 Ви повинні додати рівень монстра до `xp`.
 
 ```js
-assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\[fighting\]\.level/);
+assert.match(defeatMonster.toString(), /xp\s*\+=\s*monsters\s*\[\s*fighting\s*\]\s*\.level/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
index ccc57d64638..3310ea53a1a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8ef8f0c76a46cd221a68c.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8ef8f0c76a46cd221a68c
-title: Step 130
+title: Step 129
 challengeType: 0
-dashedName: step-130
+dashedName: step-129
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
index b6bf6df308b..71baa22d448 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8efb0e3ce826db8daf80f.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8efb0e3ce826db8daf80f
-title: Step 131
+title: Step 130
 challengeType: 0
-dashedName: step-131
+dashedName: step-130
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(defeatMonster.toString(), /update/);
 Передайте `locations[4]` як аргумент.
 
 ```js
-assert.match(defeatMonster.toString(), /update\(locations\[4\]\)/);
+assert.match(defeatMonster.toString(), /update\(\s*locations\s*\[\s*4\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
index 2cd92cba11d..1589c92f72d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8eff21c0b0f6ebe5b8e38.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8eff21c0b0f6ebe5b8e38
-title: Step 132
+title: Step 131
 challengeType: 0
-dashedName: step-132
+dashedName: step-131
 ---
 
 # --description--
 
 Ваш масив `locations` не має п’ятого елемента, тому `locations[4]` не працює.
 
-Додайте новий об’єкт в кінець масиву `locations`, дотримуючись тієї самої структури, що й в інших об’єктів. Встановіть `name` на `kill monster`, встановіть `button text` на масив з трьома рядками `Go to town square`, встановіть `button functions` на масив з трьома змінними `goTown` та встановіть `text` на `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Додайте новий об’єкт в кінець масиву `locations`, дотримуючись тієї самої структури, що й в інших об’єктів. Set `name` to `"kill monster"`, set `"button text"` to an array with three `"Go to town square"` strings, set `"button functions"` to an array with three `goTown` variables, and set `text` to `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 # --hints--
 
@@ -25,25 +25,25 @@ assert.lengthOf(locations, 5);
 assert.isObject(locations[4]);
 ```
 
-Ваше п’яте значення `locations` повинне мати властивість `name` зі значенням `kill monster`.
+Your fifth `locations` value should have a `name` property with the value `"kill monster"`.
 
 ```js
 assert.equal(locations[4].name, 'kill monster');
 ```
 
-Ваше п’яте значення `locations` повинне мати масив `button text` із трьома рядками `Go to town square`.
+Your fifth `locations` value should have a `"button text"` array with three `"Go to town square"` strings.
 
 ```js
 assert.deepEqual(locations[4]["button text"], ['Go to town square', 'Go to town square', 'Go to town square']);
 ```
 
-П’яте значення `locations` повинне мати масив `button functions` з трьома змінними `goTown`.
+Your fifth `locations` value should have a `"button functions"` array with three `goTown` variables.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, goTown]);
 ```
 
-Ваше п’яте значення `locations` повинне мати властивість `text` зі значенням `The monster screams Arg! as it dies. You gain experience points and find gold.`.
+Your fifth `locations` value should have a `text` property with the value `"The monster screams Arg! as it dies. You gain experience points and find gold."`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams Arg! as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
index c45d5df0d2a..5284c3efdfa 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f06fb318666fef69f91e.md
@@ -1,15 +1,15 @@
 ---
 id: 62a8f06fb318666fef69f91e
-title: Step 133
+title: Step 132
 challengeType: 0
-dashedName: step-133
+dashedName: step-132
 ---
 
 # --description--
 
-Слово `Arg!` повинне бути в лапках. Крім екранування лапок існує інший спосіб, як можна включити лапки в рядок.
+The word `"Arg!"` should have quotes around it. Крім екранування лапок існує інший спосіб, як можна включити лапки в рядок.
 
-Змініть подвійні лапки навколо рядка `The monster screams Arg! as it dies. You gain experience points and find gold.` на одинарні лапки `'`, потім додайте подвійні лапки навколо `Arg!`.
+Change the double quotes around the string `"The monster screams Arg! as it dies. You gain experience points and find gold."` to single quotes `'`, then add double quotes around `"Arg!"`.
 
 # --hints--
 
@@ -19,7 +19,7 @@ dashedName: step-133
 assert.match(code, /'The monster screams "?Arg!"? as it dies. You gain experience points and find gold.'/);
 ```
 
-Ви повинні використати подвійні лапки навколо `Arg!`.
+You should use double quotes around `"Arg!"`.
 
 ```js
 assert.equal(locations[4].text, 'The monster screams "Arg!" as it dies. You gain experience points and find gold.');
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
index 396987ee6c8..d784da4cf45 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f14fe6d1fc72454648c7.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f14fe6d1fc72454648c7
-title: Step 134
+title: Step 133
 challengeType: 0
-dashedName: step-134
+dashedName: step-133
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
index c0e964bb88a..4ea37c3e2f7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f1d5f5ddbf74c07f733b.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f1d5f5ddbf74c07f733b
-title: Step 135
+title: Step 134
 challengeType: 0
-dashedName: step-135
+dashedName: step-134
 ---
 
 # --description--
@@ -20,7 +20,7 @@ assert.match(lose.toString(), /update\(/);
 Your `update` function should have `locations[5]` for the argument.
 
 ```js
-assert.match(lose.toString(), /update\(locations\[5\]\)/);
+assert.match(lose.toString(), /update\(\s*locations\s*\[\s*5\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
index cfb622c0ece..c80d2844b09 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f20463b324759953edad.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f20463b324759953edad
-title: Step 136
+title: Step 135
 challengeType: 0
-dashedName: step-136
+dashedName: step-135
 ---
 
 # --description--
@@ -45,7 +45,7 @@ assert.match(restart.toString(), /gold\s*=\s*50/);
 assert.match(restart.toString(), /currentWeapon\s*=\s*0/);
 ```
 
-Ваша функція `restart` повинна встановити `inventory` на масив з рядком `stick`.
+Your `restart` function should set `inventory` to an array with the string `"stick"`.
 
 ```js
 assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
@@ -54,7 +54,7 @@ assert.match(restart.toString(), /inventory\s*=\s*\[\s*('|")stick\1\s*\]/);
 Ваша функція `restart` повинна викликати функцію `goTown()`.
 
 ```js
-assert.match(restart.toString(), /goTown\(\)/);
+assert.match(restart.toString(), /goTown\(\s*\)/);
 ```
 
 Ви повинні встановити `goldText.innerText` на значення `gold`.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
index 51c7cf97951..575d2f4632c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f256b813a476cae51f49.md
@@ -1,8 +1,8 @@
 ---
 id: 62a8f256b813a476cae51f49
-title: Step 138
+title: Step 137
 challengeType: 0
-dashedName: step-138
+dashedName: step-137
 ---
 
 # --description--
@@ -41,7 +41,7 @@ assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)/);
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\)(\s*\})?/);
+assert.match(block[1], /if\s*\(\s*fighting\s*===\s*2\s*\)\s*(\{\s*)?winGame\(\s*\)(\s*\})?/);
 ```
 
 Ви повинні додати блок `else`.
@@ -55,7 +55,7 @@ assert.include(block[1], "else");
 
 ```js
 const block = attack.toString().split("else if");
-assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\)(\s*\})?/);
+assert.match(block[1], /else\s*(\{\s*)?defeatMonster\(\s*\)(\s*\})?/);
 ```
 
 # --seed--
@@ -220,7 +220,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
index 6ca5aa8226f..bbbbb5abb16 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a8f35bde1750791f58773f.md
@@ -20,7 +20,7 @@ assert.match(code, /function\s+winGame/);
 Ваша функція `winGame` повинна викликати функцію `update` та передавати `locations[6]`.
 
 ```js
-assert.match(winGame.toString(), /update\s*\(\s*locations\[6\]\s*\)/);
+assert.match(winGame.toString(), /update\s*\(\s*locations\s*\[\s*6\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -185,7 +185,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
index 2eb375d3f38..d3d1ba724e0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62a94114ce0b8918b487390f.md
@@ -7,7 +7,7 @@ dashedName: step-140
 
 # --description--
 
-Додайте ще один об’єкт до масиву `locations`. Усе має бути таким самим, як і об’єкт `lose`, за винятком того, що `name` повинен бути `win`, а `text` повинен бути `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Додайте ще один об’єкт до масиву `locations`. Everything should be the same as the `lose` object, except the `name` should be `"win"` and the `text` should be `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 # --hints--
 
@@ -23,13 +23,13 @@ assert.lengthOf(locations, 7);
 assert.isObject(locations[6]);
 ```
 
-Ваше сьоме значення `locations` повинне мати властивість `name` зі значенням `win`.
+Your seventh `locations` value should have a `name` property with the value `"win"`.
 
 ```js
 assert.equal(locations[6].name, 'win');
 ```
 
-Ваше сьоме значення `locations` повинне мати масив `button text` із трьома рядками `REPLAY?`.
+Your seventh `locations` value should have a `button text` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[6]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
@@ -41,10 +41,10 @@ assert.deepEqual(locations[6]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?'])
 assert.deepEqual(locations[6]["button functions"], [restart, restart, restart]);
 ```
 
-Ваше сьоме значення `locations` повинне мати властивість `text` зі значенням `You defeat the dragon! YOU WIN THE GAME! 🎉`.
+Your seventh `locations` value should have a `text` property with the value `"You defeat the dragon! YOU WIN THE GAME! &#x1F389;"`.
 
 ```js
-assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! 🎉');
+assert.equal(locations[6].text, 'You defeat the dragon! YOU WIN THE GAME! &#x1F389;');
 ```
 
 # --seed--
@@ -210,7 +210,7 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   }
 --fcc-editable-region--
 ];
@@ -228,7 +228,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
index 65b8b1194cc..60fb231b1e0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1cea594f152ba626b872.md
@@ -16,7 +16,7 @@ While your game is feature complete at this stage, there are things you can do t
 Ви повинні оновити свій рядок `health` на `health -= getMonsterAttackValue(monsters[fighting].level);`.
 
 ```js
-assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(monsters\[fighting\]\.level\)/);
+assert.match(attack.toString(), /health\s*-=\s*getMonsterAttackValue\(\s*monsters\s*\[\s*fighting\s*\]\s*\.level\s*\)/);
 ```
 
 # --seed--
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -204,7 +204,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
index 71aaea8b9ed..021ae5172d4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d6736ba262cfa74344b.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
index 5b86bb8fb07..e24c36f353a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1d9f535e102e4663e7a6.md
@@ -22,13 +22,13 @@ assert.match(code, /const\s+hit/);
 Ви повинні використати рівняння `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(Math\.random\(\)\s*\*\s*xp\))/);
+assert.match(getMonsterAttackValue, /(level\s*\*\s*5)\s*-\s*(Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\))/);
 ```
 
 Ви повинні встановити значення `hit` на `(level * 5) - (Math.floor(Math.random() * xp))`.
 
 ```js
-assert.match(code, /hit\s*=\s*\(level\s*\*\s*5\)\s*-\s*\(Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\)/);
+assert.match(code, /hit\s*=\s*\(\s*level\s*\*\s*5\s*\)\s*-\s*\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
index ca2d30bb188..0e4ae99c8f3 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e3c7c3d552fb04f0f18.md
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
index af826c03f51..d5f1fa45327 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1e8ccd579330e097ce44.md
@@ -188,13 +188,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -211,7 +211,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
index c1f9ebe872b..5dd78bc1c3e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1eec891ed731db227a36.md
@@ -207,13 +207,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -230,7 +230,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
index a4a3b2f3a0f..9b8efaa3407 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa1fed3d4e873366ff3131.md
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
index 1218d857227..2156ade1245 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa204c1e1d33348ff09944.md
@@ -14,7 +14,7 @@ dashedName: step-148
 Ви повинні перемістити `monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1` у свій блок `if`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1/)
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -202,7 +202,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
index 04a866e112f..ca129b6dc85 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa20e9cf1be9358f5aceae.md
@@ -7,20 +7,20 @@ dashedName: step-149
 
 # --description--
 
-Add an `else` statement to the first `if` statement inside your `attack()` function. Використайте оператор `+=` в інструкції `else`, щоб додати текст `You miss.` в кінець `text.innerText`.
+Add an `else` statement to the first `if` statement inside your `attack()` function. In the `else` statement, use the `+=` operator to add the text `" You miss."` to the end of `text.innerText`.
 
 # --hints--
 
 Ви повинні додати блок `else` після свого блоку `if (isMonsterHit())`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else/)
 ```
 
-Додайте текст `You miss.` у кінець `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
+You should add the text `" You miss."` to the end of `text.innerText`. Remember to use compound assignment and make sure there is a space before the word `You`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(isMonsterHit\(\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\[currentWeapon\]\.power\s*\+\s*Math\.floor\(Math\.random\(\)\s*\*\s*xp\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
+assert.match(attack.toString(), /if\s*\(\s*isMonsterHit\(\s*\)\s*\)\s*\{\s*monsterHealth\s*-=\s*weapons\s*\[\s*currentWeapon\s*\]\s*\.power\s*\+\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*xp\s*\)\s*\+\s*1;\s*\}\s*else\s*\{\s*text\.innerText\s*\+=\s*('|")\sYou miss\.\1/)
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
index 27b4f1f3609..32fa592ba0f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2136fc49b836dfedb959.md
@@ -20,7 +20,7 @@ assert.match(code, /function\s+isMonsterHit/);
 Ваша функція `isMonsterHit` повинна повертати результат порівняння `Math.random() > .2`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2/);
 ```
 
 # --seed--
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
index 2355095b6fe..90325e00e0f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21971e3b743844849985.md
@@ -32,7 +32,7 @@ assert.match(isMonsterHit.toString(), /\|\|\s*health\s*<\s*20/);
 Ваша функція повинна повернути результат порівняння `Math.random() > .2` **або** `health < 20`.
 
 ```js
-assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
+assert.match(isMonsterHit.toString(), /return\s+Math\.random\(\s*\)\s*>\s*0?\.2\s*\|\|\s*health\s*<\s*20/);
 ```
 
 # --seed--
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
index 8c0d362260d..939d98b91ec 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa21ea8d9d9f396b95dd87.md
@@ -21,7 +21,7 @@ assert.lengthOf(ifs, 5);
 Ваша нова інструкція `if` повинна перевіряти `Math.random() <= .1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\)\s*<=\s*0?\.1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*<=\s*0?\.1\s*\)/);
 ```
 
 # --seed--
@@ -186,13 +186,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -209,7 +209,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
index e7eb60d2eb8..1271ebe7d8d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa226207f33d3ad4c6f546.md
@@ -7,7 +7,7 @@ dashedName: step-153
 
 # --description--
 
-Use the `+=` operator to add `Your <weapon> breaks.`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
+Use the `+=` operator to add `" Your <weapon> breaks."`, with a space in front of `Your`, to the end of `text.innerText`. Replace `<weapon>` with the last item in the `inventory` array using `inventory.pop()`, which will remove the last item in the array AND return it so it appears in your string.
 
 # --hints--
 
@@ -21,7 +21,7 @@ assert.lengthOf(concat, 3);
 Ви повинні використати метод `pop` для масиву `inventory`.
 
 ```js
-assert.match(attack.toString(), /inventory\.pop\(\)/);
+assert.match(attack.toString(), /inventory\.pop\(\s*\)/);
 ```
 
 Ви повинні додати `Your` (з пробілом перед і після) до `text.innerText`.
@@ -30,17 +30,16 @@ assert.match(attack.toString(), /inventory\.pop\(\)/);
 assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1/);
 ```
 
-Ви повинні додати значення, що повертається `inventory.pop()` до рядка `Your`.
+You should add the return value of `inventory.pop()` to the `" Your "` string.
 
 ```js
-console.log(attack.toString());
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)/);
 ```
 
-Ви повинні додати `breaks.` (з пробілом перед) у кінець рядка.
+You should add `" breaks."`, with a space in front of it, to the end of your string.
 
 ```js
-assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\)\s*\+\s*('|")\sbreaks\.\2/);
+assert.match(attack.toString(), /text\.innerText\s*\+=\s*('|")\sYour\s\1\s*\+\s*inventory\.pop\(\s*\)\s*\+\s*('|")\sbreaks\.\2/);
 ```
 
 # --seed--
@@ -205,13 +204,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -228,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
index d7854e36717..ea035c6a64c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa22aba186563bcbf2c395.md
@@ -7,7 +7,13 @@ dashedName: step-154
 
 # --description--
 
-Пам'ятайте, що оператор інкременту `++` можна використати, щоб збільшити значення змінної на 1. Також існує <dfn>оператор декременту</dfn> `--` для того, щоб зменшити значення змінної на 1.
+Remember that the increment operator `++` can be used to increase a variable's value by `1`. There is also a <dfn>decrement operator</dfn> `--` that can be used to decrease a variable's value by `1`. For example :
+
+```js
+let num = 10;
+num--;
+console.log(num); // Output: 9
+```
 
 Після того, як ви оновите текст, зменште значення `currentWeapon` у своїй інструкції `if`.
 
@@ -187,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -210,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
index c5727254cc0..92759474ce9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa234322d4ad3e8bce42cc.md
@@ -24,19 +24,19 @@ if (firstName === "Quincy" && lastName === "Larson") {
 Ви не повинні змінювати свою наявну інструкцію `if`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1/);
 ```
 
 Ви повинні використати логічний оператор AND `&&`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&/);
 ```
 
 Ви повинні використати логічний оператор AND, щоб перевірити, чи `inventory.length` не дорівнює `1`.
 
 ```js
-assert.match(attack.toString(), /if\s*\(Math\.random\(\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
+assert.match(attack.toString(), /if\s*\(\s*Math\.random\(\s*\)\s*\<=\s*\.1\s*&&\s*inventory\.length\s*\!\=\=\s*1\s*\)/);
 ```
 
 # --seed--
@@ -201,13 +201,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
index 90d63ba30ae..71ff33beb47 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2469c77b363fdb4f0e06.md
@@ -28,7 +28,7 @@ assert.match(easterEgg.toString(), /update\(/);
 `easterEgg` повинна викликати функцію `update` з аргументом `locations[7]`.
 
 ```js
-assert.match(easterEgg.toString(), /update\(\s*locations\[7\]\s*\)/);
+assert.match(easterEgg.toString(), /update\(\s*locations\s*\[\s*7\s*\]\s*\)/);
 ```
 
 # --seed--
@@ -193,13 +193,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -216,7 +216,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
index 6178aab76bd..3849aae8971 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa252c3b1073415ba2b898.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
index a9355bcde32..3f5bd5d27b7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa258da314ef42ba0a1858.md
@@ -211,13 +211,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   }
 ];
 
@@ -234,7 +234,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
index d9dd08669ce..92243872656 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa25fcb5837d43b4d9873d.md
@@ -7,7 +7,7 @@ dashedName: step-159
 
 # --description--
 
-Додайте ще один об’єкт до свого масиву `locations`. Встановіть `name` на `easter egg`, встановіть `button text` на масив з рядками `2`, `8` та `Go to town square?`, встановіть `button functions` на масив зі змінними `pickTwo`, `pickEight` та `goTown` і встановіть `text` на `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Додайте ще один об’єкт до свого масиву `locations`. Set `name` to `"easter egg"`, set `"button text"` to an array with the strings `"2"`, `"8"`, and `"Go to town square?"`, set `"button functions"` to an array with the variables `pickTwo`, `pickEight`, and `goTown`, and `text` to `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 # --hints--
 
@@ -23,25 +23,25 @@ assert.lengthOf(locations, 8);
 assert.isObject(locations[7]);
 ```
 
-Ваше восьме значення `locations` повинне мати властивість `name` зі значенням `easter egg`.
+Your eighth `locations` value should have a `name` property with the value `"easter egg"`.
 
 ```js
 assert.equal(locations[7].name, "easter egg");
 ```
 
-Ваше восьме значення `locations` повинне мати `button text` як масив з рядками `2`, `8` та `Go to town square?`.
+Your eighth `locations` value should have a `"button text"` array with the strings `"2"`, `"8"`, and `"Go to town square?"`.
 
 ```js
 assert.deepEqual(locations[7]["button text"], ["2", "8", "Go to town square?"]);
 ```
 
-Восьме значення `locations` повинне мати `button functions` як масив зі змінними `pickTwo`, `pickEight` та `goTown`.
+Your eighth `locations` value should have a `"button functions"` an array with the variables `pickTwo`, `pickEight`, and `goTown`.
 
 ```js
 assert.deepEqual(locations[7]["button functions"], [pickTwo, pickEight, goTown]);
 ```
 
-Ваше восьме значення `locations` повинне мати властивість `text` зі значенням `You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!`.
+Your eighth `locations` value should have a `text` property with the value `"You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!"`.
 
 ```js
 assert.equal(locations[7].text, "You find a secret game. Pick a number above. Ten numbers will be randomly chosen between 0 and 10. If the number you choose matches one of the random numbers, you win!");
@@ -209,13 +209,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
 --fcc-editable-region--
 
@@ -235,7 +235,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
index 3a9c77a9076..ba28c796805 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2626c3c10244b94c787b.md
@@ -14,7 +14,7 @@ Inside `pick`, use `const` to initialize a variable named `numbers` and set it t
 Функція `pick` має ініціалізувати `numbers` порожнім масивом `[]`.
 
 ```js
-assert.match(pick.toString(), /numbers\s*=\s*\[\]/);
+assert.match(pick.toString(), /numbers\s*=\s*\[\s*\]/);
 ```
 
 # --seed--
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
index ef1d8312fbf..8e26e25a524 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa264d23cdaa45a20efada.md
@@ -195,13 +195,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -224,7 +224,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
index f6736081e10..6f650a574d0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa26cca3cd3d46c431e73b.md
@@ -20,13 +20,13 @@ assert.match(pick.toString(), /numbers\.push\(/);
 Ви повинні використати `Math.floor(Math.random() * 11)`, щоб створити випадкове число.
 
 ```js
-assert.match(pick.toString(), /Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)/);
+assert.match(pick.toString(), /Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)/);
 ```
 
 Ви повинні `push` (додати) результат `Math.floor(Math.random() * 11)` в кінець масиву `numbers`.
 
 ```js
-assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(Math\.random\(\)\s*\*\s*11\s*\)\s*\)/);
+assert.match(pick.toString(), /numbers\.push\(\s*Math\.floor\(\s*Math\.random\(\s*\)\s*\*\s*11\s*\)\s*\)/);
 ```
 
 # --seed--
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
index a55ef1aa729..8b2f89a3a83 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27227399d647e1c37a3c.md
@@ -7,23 +7,23 @@ dashedName: step-163
 
 # --description--
 
-After the `while` loop, set `text.innerText` to equal `You picked <someGuess>. Here are the random numbers:`. Replace `<someGuess>` with the `guess` function parameter.
+After the `while` loop, set `text.innerText` to equal `"You picked <someGuess>. Here are the random numbers:"`. Replace `<someGuess>` with the `guess` function parameter.
 
 # --hints--
 
-Ви повинні встановити `text.innerText` на рядок `You picked`. Пам'ятайте, що інтервал має значення.
+You should set `text.innerText` to the string `"You picked "`. Пам'ятайте, що інтервал має значення.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1/);
 ```
 
-Ви повинні використати оператор конкатенації, щоб додати значення параметра `guess` до свого рядка `You picked`.
+You should use the concatenation operator to add the value of the `guess` parameter to your `"You picked "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess/);
 ```
 
-Ви повинні використати оператор конкатенації, щоб додати рядок `. Here are the random numbers:` до свого рядка `"You picked " + guess`.
+You should use the concatenation operator to add the string `". Here are the random numbers:"` to your `"You picked " + guess` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\2/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
index 13466ad42b9..59409a1ebdd 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27560def7048d7b4a095.md
@@ -11,7 +11,7 @@ At the end of the string, before the final quote, insert the new line escape cha
 
 # --hints--
 
-Ви повинні додати символ екранування нового рядка `\n` до свого рядка `. Here are the random numbers:`.
+You should add the new line escape character `\n` to your `". Here are the random numbers: "` string.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*=\s*('|")You picked \1\s*\+\s*guess\s*\+\s*('|")\.\sHere are the random numbers:\\n\2/);
@@ -179,13 +179,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -208,7 +208,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
index 0581a34e2a0..da66d020df3 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa27c40ca6f04ab8be5fac.md
@@ -185,13 +185,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -214,7 +214,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
index 8516798b543..26d70c7a23f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28032d863d4bd8058799.md
@@ -11,7 +11,7 @@ dashedName: step-166
 
 Вираз ініціалізації виконується лише раз, перед початком циклу, та часто використовується для визначення та налаштування змінної циклу. Сприймайте це як оголошення лічильника, щоб використати його у своєму циклі.
 
-Багато циклів `for` використовують `i` як лічильник та починають з 0, тому змініть `let x = 1;` на `let i = 0;`.
+Many `for` loops use `i` as the counter and start from `0`, so change `let x = 1;` to `let i = 0;`.
 
 # --hints--
 
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
index cdfbee6d6ba..1b8f21b61e0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa287434dc284cea01157c.md
@@ -9,7 +9,7 @@ dashedName: step-167
 
 Друга інструкція у циклі `for`, умовна інструкція, обчислюється на початку кожної ітерації циклу. Цикл продовжується, поки умова істинна.
 
-Цикл повинен виконуватись 10 раз, тому змініть `x < 5` на `i < 10`.
+We want the loop to run `10` times, so change `x < 5` to `i < 10`.
 
 # --hints--
 
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
index 1aa45f7c6df..e5e40856ca1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28bbd6323e4dfb3ac43e.md
@@ -181,13 +181,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -210,7 +210,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
index 06ee5fbbddc..edf684ae165 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa28fb651bf14efa2dbb16.md
@@ -20,20 +20,19 @@ assert.match(pick.toString(), /text\.innerText\s*\+=/);
 Ви повинні використати дужкову нотацію, щоб отримати доступ до `numbers[i]`.
 
 ```js
-assert.match(pick.toString(), /numbers\[i\]/);
+assert.match(pick.toString(), /numbers\s*\[\s*i\s*\]/);
 ```
 
 Ви повинні додати `numbers[i]` до свого значення `text.innerText`.
 
 ```js
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]/);
 ```
 
 Ви повинні додати символ нового рядка після значення `numbers[i]`. Це можна зробити за допомогою `\n`.
 
 ```js
-console.log(pick.toString());
-assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\[i\]\s*\+\s*('|")\\n\1/);
+assert.match(pick.toString(), /text\.innerText\s*\+=\s*numbers\s*\[\s*i\s*\]\s*\+\s*('|")\\n\1/);
 ```
 
 # --seed--
@@ -198,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
index 7c7de70fbf9..86effd1eed5 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2943669c9d5026af6985.md
@@ -198,13 +198,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -227,7 +227,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
index 4826a324e6d..2df9d67832f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2999ec27ec516655eba6.md
@@ -7,11 +7,11 @@ dashedName: step-171
 
 # --description--
 
-Inside the `if` statement, add the string `Right! You win 20 gold!` to the end of `text.innerText`. Також додайте `20` до значення `gold` та оновіть `goldText.innerText`.
+Inside the `if` statement, add the string `"Right! You win 20 gold!"` to the end of `text.innerText`. Також додайте `20` до значення `gold` та оновіть `goldText.innerText`.
 
 # --hints--
 
-Ви повинні використати складене присвоювання, щоб додати рядок `Right! You win 20 gold!` в кінці `text.innerText`.
+You should use compound assignment to add the string `"Right! You win 20 gold!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Right! You win 20 gold!\1/);
@@ -191,13 +191,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -220,7 +220,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
index 56b8bbd7c46..9ac0ce7e498 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa29d8f8f88152c91350ca.md
@@ -7,7 +7,7 @@ dashedName: step-172
 
 # --description--
 
-Now add an `else` statement. Всередині додайте `Wrong! You lose 10 health!` в кінці `text.innerText`. Відніміть `10` від `health` та оновіть `healthText.innerText`.
+Now add an `else` statement. Inside, add `"Wrong! You lose 10 health!"` to the end of `text.innerText`. Відніміть `10` від `health` та оновіть `healthText.innerText`.
 
 # --hints--
 
@@ -17,7 +17,7 @@ Now add an `else` statement. Всередині додайте `Wrong! You lose
 assert.match(pick.toString(), /else\s*\{/);
 ```
 
-Ваш блок `else` повинен використовувати складене присвоювання, щоб додати `Wrong! You lose 10 health!` в кінці `text.innerText`.
+Your `else` block should use compound assignment to add `"Wrong! You lose 10 health!"` to the end of `text.innerText`.
 
 ```js
 assert.match(pick.toString(), /text\.innerText\s*\+=\s*('|")Wrong! You lose 10 health!\1/);
@@ -197,13 +197,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -226,7 +226,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
index d2b191277f5..51736f0417b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2aec2f09d454253aad6c.md
@@ -27,7 +27,7 @@ assert.match(pick.toString(), /if\s*\(\s*health\s*<=\s*0\s*\)/);
 Ваша інструкція `if` повинна викликати функцію `lose`.
 
 ```js
-assert.match(pick.toString(), /lose\(\)/);
+assert.match(pick.toString(), /lose\(\s*\)/);
 ```
 
 # --seed--
@@ -192,13 +192,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -221,7 +221,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
index 3f1d8e999a7..b30bfbdd9ce 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62aa2ba9cd881355a6f0a5a8.md
@@ -7,13 +7,13 @@ dashedName: step-174
 
 # --description--
 
-Глянувши на ваш об'єкт `kill monster`, `button functions` зараз має три змінні `goTown`. Змініть третю на `easterEgg`: таким чином гравець отримає доступ до прихованої властивості гри. Не змінюйте `button text`.
+Looking at your `"kill monster"` object, `"button functions"` currently has three `goTown` variables. Змініть третю на `easterEgg`: таким чином гравець отримає доступ до прихованої властивості гри. Do not change the `"button text"`.
 
 На цьому ваша рольова гра готова! Ви можете зіграти в неї, але чи можете ви побороти дракона?
 
 # --hints--
 
-Ви повинні оновити свій п'ятий об'єкт `locations`, щоб він мав властивість `button functions` зі значенням `[goTown, goTown, easterEgg]`.
+You should update your fifth `locations` object to have a `"button functions"` property of `[goTown, goTown, easterEgg]`.
 
 ```js
 assert.deepEqual(locations[4]["button functions"], [goTown, goTown, easterEgg]);
@@ -183,13 +183,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
@@ -212,7 +212,7 @@ function update(location) {
   button1.onclick = location["button functions"][0];
   button2.onclick = location["button functions"][1];
   button3.onclick = location["button functions"][2];
-  text.innerText = location.text;
+  text.innerHTML = location.text;
 }
 
 function goTown() {
@@ -557,13 +557,13 @@ const locations = [
     name: "lose",
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
     "button functions": [restart, restart, restart],
-    text: "You die. ☠️"
+    text: "You die. &#x2620;"
   },
   { 
     name: "win", 
     "button text": ["REPLAY?", "REPLAY?", "REPLAY?"], 
     "button functions": [restart, restart, restart], 
-    text: "You defeat the dragon! YOU WIN THE GAME! 🎉" 
+    text: "You defeat the dragon! YOU WIN THE GAME! &#x1F389;" 
   },
   {
     name: "easter egg",
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
index 3af3809c933..6d66312dc34 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62ba17beef16c563069a65d8.md
@@ -1,13 +1,13 @@
 ---
 id: 62ba17beef16c563069a65d8
-title: Step 137
+title: Step 136
 challengeType: 0
-dashedName: step-137
+dashedName: step-136
 ---
 
 # --description--
 
-У масив `locations` додайте ще один об’єкт у кінці. Встановіть властивість `name` на `lose`, встановіть `button text` на масив з трьома рядками `REPLAY?`, встановіть `button functions` на масив з трьома змінними `restart` та встановіть `text` на `You die. ☠️`. Ви можете скопіювати цей текст, щоб використати емот.
+У масив `locations` додайте ще один об’єкт у кінці. Set the `name` property to `"lose"`, set `"button text"` to an array with three `"REPLAY?"` strings, set `"button functions"` to an array with three `restart` variables, and set `text` to `"You die. &#x2620;"`.
 
 # --hints--
 
@@ -23,28 +23,28 @@ assert.lengthOf(locations, 6);
 assert.isObject(locations[5]);
 ```
 
-Ваше шосте значення `locations` повинне мати властивість `name` зі значенням `lose`.
+Your sixth `locations` value should have a `name` property with the value `"lose"`.
 
 ```js
 assert.equal(locations[5].name, 'lose');
 ```
 
-Ваше шосте значення `locations` повинне мати масив `button text` з трьома рядками `REPLAY?`.
+Your sixth `locations` value should have a `"button text"` array with three `"REPLAY?"` strings.
 
 ```js
 assert.deepEqual(locations[5]["button text"], ['REPLAY?', 'REPLAY?', 'REPLAY?']);
 ```
 
-Шосте значення `locations` повинне мати масив `button functions` з трьома змінними `restart`.
+Your sixth `locations` value should have a `"button functions"` array with three `restart` variables.
 
 ```js
 assert.deepEqual(locations[5]["button functions"], [restart, restart, restart]);
 ```
 
-Ваше шосте значення `locations` повинне мати властивість `text` зі значенням `You die. ☠️`.
+Your sixth `locations` value should have a `text` property with the value `"You die. &#x2620;"`.
 
 ```js
-assert.equal(locations[5].text, 'You die. ☠️');
+assert.equal(locations[5].text, 'You die. &#x2620;');
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
index abaaa2d0e1e..4fb82e0e4e6 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/62fc20387ef88d1d1998aac5.md
@@ -17,7 +17,7 @@ dashedName: step-22
 assert.match(code, /const\s+button2/);
 ```
 
-Змінна `button2` повинна мати значення елемента `#button2`.
+Your `button2` variable should have the value of your `"#button2"` element.
 
 ```js
 assert.deepEqual(button2, document.querySelector('#button2'));
@@ -29,7 +29,7 @@ assert.deepEqual(button2, document.querySelector('#button2'));
 assert.match(code, /const\s+button3/);
 ```
 
-Змінна `button3` повинна мати значення елемента `#button3`.
+Your `button3` variable should have the value of your `"#button3"` element.
 
 ```js
 assert.deepEqual(button3, document.querySelector('#button3'));
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
new file mode 100644
index 00000000000..432c7be3420
--- /dev/null
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-javascript-by-building-a-role-playing-game/65b2f6acce65b7a69751a090.md
@@ -0,0 +1,356 @@
+---
+id: 65b2f6acce65b7a69751a090
+title: Step 138
+challengeType: 0
+dashedName: step-138
+---
+
+# --description--
+
+In order for the `&#x2620;` emoticon text to properly display on the page, you will need to use the <dfn>innerHTML</dfn> property.
+
+The `innerHTML` property allows you to access or modify the content inside an HTML element using JavaScript.
+
+Here is an example of updating the content for this paragraph element using the `innerHTML`  property.
+
+```html
+<p id="demo">This is a paragraph.</p>
+```
+
+```js
+document.querySelector("#demo").innerHTML = "Hello, innerHTML!";
+```
+
+In the `update` function, change `text.innerText` to `text.innerHTML`.
+
+# --hints--
+
+
+You should use dot notation to access the `innerHTML` property of `text`.
+
+```js
+assert.match(code, /text\.innerHTML/);
+```
+
+You should not use `let` or `const` to access the `innerHTML` property of `text`.
+
+```js
+assert.notMatch(code, /(let|const)\s+text.innerHTML/);
+```
+
+You should set `innerHTML` equal to the `text` property of `location`.
+
+```js
+assert.match(code, /text\.innerHTML\s*=\s*location\.text/);
+```
+
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <link rel="stylesheet" href="./styles.css">
+    <title>RPG - Dragon Repeller</title>
+  </head>
+  <body>
+    <div id="game">
+      <div id="stats">
+        <span class="stat">XP: <strong><span id="xpText">0</span></strong></span>
+        <span class="stat">Health: <strong><span id="healthText">100</span></strong></span>
+        <span class="stat">Gold: <strong><span id="goldText">50</span></strong></span>
+      </div>
+      <div id="controls">
+        <button id="button1">Go to store</button>
+        <button id="button2">Go to cave</button>
+        <button id="button3">Fight dragon</button>
+      </div>
+      <div id="monsterStats">
+        <span class="stat">Monster Name: <strong><span id="monsterName"></span></strong></span>
+        <span class="stat">Health: <strong><span id="monsterHealth"></span></strong></span>
+      </div>
+      <div id="text">
+        Welcome to Dragon Repeller. You must defeat the dragon that is preventing people from leaving the town. You are in the town square. Where do you want to go? Use the buttons above.
+      </div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+body {
+  background-color: #0a0a23;
+}
+
+#text {
+  background-color: #0a0a23;
+  color: #ffffff;
+  padding: 10px;
+}
+
+#game {
+  max-width: 500px;
+  max-height: 400px;
+  background-color: #ffffff;
+  color: #ffffff;
+  margin: 30px auto 0px;
+  padding: 10px;
+}
+
+#controls,
+#stats {
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #0a0a23;
+}
+
+#monsterStats {
+  display: none;
+  border: 1px solid #0a0a23;
+  padding: 5px;
+  color: #ffffff;
+  background-color: #c70d0d;
+}
+
+.stat {
+  padding-right: 10px;
+}
+
+button {
+  cursor: pointer;
+  color: #0a0a23;
+  background-color: #feac32;
+  background-image: linear-gradient(#fecc4c, #ffac33);
+  border: 3px solid #feac32;
+}
+```
+
+```js
+let xp = 0;
+let health = 100;
+let gold = 50;
+let currentWeapon = 0;
+let fighting;
+let monsterHealth;
+let inventory = ["stick"];
+
+const button1 = document.querySelector('#button1');
+const button2 = document.querySelector("#button2");
+const button3 = document.querySelector("#button3");
+const text = document.querySelector("#text");
+const xpText = document.querySelector("#xpText");
+const healthText = document.querySelector("#healthText");
+const goldText = document.querySelector("#goldText");
+const monsterStats = document.querySelector("#monsterStats");
+const monsterName = document.querySelector("#monsterName");
+const monsterHealthText = document.querySelector("#monsterHealth");
+const weapons = [
+  { name: 'stick', power: 5 },
+  { name: 'dagger', power: 30 },
+  { name: 'claw hammer', power: 50 },
+  { name: 'sword', power: 100 }
+];
+const monsters = [
+  {
+    name: "slime",
+    level: 2,
+    health: 15
+  },
+  {
+    name: "fanged beast",
+    level: 8,
+    health: 60
+  },
+  {
+    name: "dragon",
+    level: 20,
+    health: 300
+  }
+]
+const locations = [
+  {
+    name: "town square",
+    "button text": ["Go to store", "Go to cave", "Fight dragon"],
+    "button functions": [goStore, goCave, fightDragon],
+    text: "You are in the town square. You see a sign that says \"Store\"."
+  },
+  {
+    name: "store",
+    "button text": ["Buy 10 health (10 gold)", "Buy weapon (30 gold)", "Go to town square"],
+    "button functions": [buyHealth, buyWeapon, goTown],
+    text: "You enter the store."
+  },
+  {
+    name: "cave",
+    "button text": ["Fight slime", "Fight fanged beast", "Go to town square"],
+    "button functions": [fightSlime, fightBeast, goTown],
+    text: "You enter the cave. You see some monsters."
+  },
+  {
+    name: "fight",
+    "button text": ["Attack", "Dodge", "Run"],
+    "button functions": [attack, dodge, goTown],
+    text: "You are fighting a monster."
+  },
+  {
+    name: "kill monster",
+    "button text": ["Go to town square", "Go to town square", "Go to town square"],
+    "button functions": [goTown, goTown, goTown],
+    text: 'The monster screams "Arg!" as it dies. You gain experience points and find gold.'
+  },
+  {
+    name: "lose",
+    "button text": ["REPLAY?", "REPLAY?", "REPLAY?"],
+    "button functions": [restart, restart, restart],
+    text: "You die. &#x2620;"
+  }
+
+];
+
+// initialize buttons
+button1.onclick = goStore;
+button2.onclick = goCave;
+button3.onclick = fightDragon;
+
+function update(location) {
+  --fcc-editable-region--
+  monsterStats.style.display = "none";
+  button1.innerText = location["button text"][0];
+  button2.innerText = location["button text"][1];
+  button3.innerText = location["button text"][2];
+  button1.onclick = location["button functions"][0];
+  button2.onclick = location["button functions"][1];
+  button3.onclick = location["button functions"][2];
+  text.innerText = location.text;
+  --fcc-editable-region--
+}
+
+function goTown() {
+  update(locations[0]);
+}
+
+function goStore() {
+  update(locations[1]);
+}
+
+function goCave() {
+  update(locations[2]);
+}
+
+function buyHealth() {
+  if (gold >= 10) {
+    gold -= 10;
+    health += 10;
+    goldText.innerText = gold;
+    healthText.innerText = health;
+  } else {
+    text.innerText = "You do not have enough gold to buy health.";
+  }
+}
+
+function buyWeapon() {
+  if (currentWeapon < weapons.length - 1) {
+    if (gold >= 30) {
+      gold -= 30;
+      currentWeapon++;
+      goldText.innerText = gold;
+      let newWeapon = weapons[currentWeapon].name;
+      text.innerText = "You now have a " + newWeapon + ".";
+      inventory.push(newWeapon);
+      text.innerText += " In your inventory you have: " + inventory;
+    } else {
+      text.innerText = "You do not have enough gold to buy a weapon.";
+    }
+  } else {
+    text.innerText = "You already have the most powerful weapon!";
+    button2.innerText = "Sell weapon for 15 gold";
+    button2.onclick = sellWeapon;
+  }
+}
+
+function sellWeapon() {
+  if (inventory.length > 1) {
+    gold += 15;
+    goldText.innerText = gold;
+    let currentWeapon = inventory.shift();
+    text.innerText = "You sold a " + currentWeapon + ".";
+    text.innerText += " In your inventory you have: " + inventory;
+  } else {
+    text.innerText = "Don't sell your only weapon!";
+  }
+}
+
+function fightSlime() {
+  fighting = 0;
+  goFight();
+}
+
+function fightBeast() {
+  fighting = 1;
+  goFight();
+}
+
+function fightDragon() {
+  fighting = 2;
+  goFight();
+}
+
+function goFight() {
+  update(locations[3]);
+  monsterHealth = monsters[fighting].health;
+  monsterStats.style.display = "block";
+  monsterName.innerText = monsters[fighting].name;
+  monsterHealthText.innerText = monsterHealth;
+}
+
+function attack() {
+  text.innerText = "The " + monsters[fighting].name + " attacks.";
+  text.innerText += " You attack it with your " + weapons[currentWeapon].name + ".";
+  health -= monsters[fighting].level;
+  monsterHealth -= weapons[currentWeapon].power + Math.floor(Math.random() * xp) + 1;
+  healthText.innerText = health;
+  monsterHealthText.innerText = monsterHealth;
+   if (health <= 0) {
+    lose();
+  } else if (monsterHealth <= 0) {
+    if (fighting === 2) {
+      winGame();
+    } else {
+      defeatMonster();
+    }
+  }
+}
+
+function dodge() {
+  text.innerText = "You dodge the attack from the " + monsters[fighting].name;
+}
+
+function defeatMonster() {
+  gold += Math.floor(monsters[fighting].level * 6.7);
+  xp += monsters[fighting].level;
+  goldText.innerText = gold;
+  xpText.innerText = xp;
+  update(locations[4]);
+}
+
+function lose() {
+  update(locations[5]);
+}
+
+function restart() {
+  xp = 0;
+  health = 100;
+  gold = 50;
+  currentWeapon = 0;
+  inventory = ["stick"];
+  goldText.innerText = gold;
+  healthText.innerText = health;
+  xpText.innerText = xp;
+  goTown();
+}
+```
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
index 05e2780e5fe..e667536044f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efdbc22a0c56070beabed7.md
@@ -22,21 +22,21 @@ assert.match(cart.addItem.toString(), /dessert\.id/);
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 Ви повинні використовувати оператор присвоєння, щоб оновити значення властивості `totalCountPerProduct`, яка відповідає `dessert.id`.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=/);
 ```
 
 Ви повинні оновити значення `totalCountPerProduct` до поточного значення плюс один.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\+\s*1/);
 ```
 
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
index d1194a72ff1..6fc08d75f29 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63efe370bbfc4a08d500118e.md
@@ -17,28 +17,28 @@ You should wrap your right-hand `totalCountPerProduct[dessert.id]` in parenthese
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]/);
 ```
 
 Ви повинні використати оператор `||`.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*/);
 ```
 
 Ви повинні використовувати `0` як резервне значення.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)/);
 ```
 
 Ви все ще повинні додати `1` до значення.
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /totalCountPerProduct\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
+assert.match(cart.addItem.toString(), /totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*=\s*\(\s*totalCountPerProduct\s*\[\s*dessert\.id\s*\]\s*\|\|\s*0\s*\)\s*\+\s*1/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
index 8bafead1d4c..49dd8708f05 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63eff02f00e69a0b2ac10b43.md
@@ -29,7 +29,7 @@ assert.match(afterAdd, /const\s+currentProductCount\s*=/);
 
 ```js
 const cart = new ShoppingCart();
-assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\[product\.id\]/);
+assert.match(cart.addItem.toString(), /currentProductCount\s*=\s*totalCountPerProduct\s*\[\s*product\.id\s*\]/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
index 816bb7e9295..0f6b3305c6f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f0284532742c1b26c7a052.md
@@ -32,7 +32,7 @@ assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*
 Ви повинні додати порожню функцію зворотного виклику до слухача подій. Не забудьте надати йому параметр `event`.
 
 ```js
-assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*\s*\}\s*\)/);
+assert.match(code, /\[\s*\.\.\.addToCartBtns\s*\]\s*\.\s*forEach\s*\(\s*(?:\(\s*btn\s*\)|btn)\s*=>\s*\{\s*btn\s*\.\s*addEventListener\s*\(\s*('|"|`)click\1\s*,\s*(\(\s*event\s*\)|event)\s*=>\s*\{\s*\}\s*\)\s*;?\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
index 7c5dc7b65d5..5a1d2e439ee 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02a4ef92d711ec1ff618c.md
@@ -53,7 +53,7 @@ assert.match(afterCalculateTotal, /\(\s*total\s*,\s*item\s*\)\s*=>\s*total\s*\+\
 
 ```js
 const afterCalculateTotal = code.split('calculateTotal')[1];
-assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(total,\s*item\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
+assert.match(afterCalculateTotal, /this\s*\.\s*items\s*\.\s*reduce\s*\(\s*\(\s*total,\s*item\s*\)\s*=>\s*total\s*\+\s*item\.price\s*,\s*0\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
index 9bafe3f2f5f..3b9cbc5c37e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-oop-by-building-a-shopping-cart/63f02bdeb9b428208b97eb6b.md
@@ -37,7 +37,6 @@ assert.match(afterCalculateTaxes, /amount\s*\*\s*\(\s*this\s*\.\s*taxRate\s*\/\s
 Ваш метод `calculateTaxes` повинен повернути значення `taxRate` (поділене на 100, щоб перетворити його у відсотки), помножене на параметр `amount`.
 
 ```js
-console.log(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 assert.equal(cart.calculateTaxes(10), (cart.taxRate / 100) * 10);
 ```
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
index 941054be34c..5d946fb711d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652f948489abbb81e6bf5a01.md
@@ -19,37 +19,37 @@ Start by accessing the `#playlist-songs`, `#play`, and `#pause` elements with th
 You should use `document.getElementById()` to get the `#playlist-songs` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should assign the `#playlist-songs` element to the variable `playlistSongs`. Не забувайте використовувати `const` для оголошення змінної.
 
 ```js
-assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\)/);
+assert.match(code, /const\s+playlistSongs\s*\=\s*document\.getElementById\(\s*('|"|`)playlist\-songs\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#play` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should assign the `#play` element to the variable `playButton`. Не забувайте використовувати `const` для оголошення змінної.
 
 ```js
-assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\)/);
+assert.match(code, /const\s+playButton\s*\=\s*document\.getElementById\(\s*('|"|`)play\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#pause` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 You should assign the `#pause` element to the variable `pauseButton`. Не забувайте використовувати `const` для оголошення змінної.
 
 ```js
-assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\)/);
+assert.match(code, /const\s+pauseButton\s*\=\s*document\.getElementById\(\s*('|"|`)pause\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
index 4a31532d056..8a06f902ad4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/652fa2aee6374ad29b5d49b4.md
@@ -16,37 +16,37 @@ Assign them to variables named `nextButton`, `previousButton`, and `shuffleButto
 You should use `document.getElementById()` to get the `#next` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should assign the `#next` element to the variable `nextButton`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\)/);
+assert.match(code, /const\s+nextButton\s*\=\s*document\.getElementById\(\s*('|"|`)next\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#previous` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should assign the `#previous` element to the variable `previousButton`. Не забувайте використовувати `const` для оголошення змінної.
 
 ```js
-assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\)/);
+assert.match(code, /const\s+previousButton\s*\=\s*document\.getElementById\(\s*('|"|`)previous\1\s*\)/);
 ```
 
 You should use `document.getElementById()` to get the `#shuffle` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 You should assign the `#shuffle` element to the variable `shuffleButton`. Не забувайте використовувати `const` для оголошення змінної.
 
 ```js
-assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\)/);
+assert.match(code, /const\s+shuffleButton\s*\=\s*document\.getElementById\(\s*('|"|`)shuffle\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
index 23b5f0263b9..236a9ca46ca 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65327e9c7ea42e125256b29a.md
@@ -18,13 +18,13 @@ Use `const` to create a variable named `audio` and set it equal to `new Audio()`
 You should use the `new` keyword to create an instance of the `Audio` object.
 
 ```js
-assert.match(code, /new\s+Audio\(\);?/)
+assert.match(code, /new\s+Audio\(\s*\);?/)
 ```
 
 You should assign the `Audio` object to a constant named `audio`.
 
 ```js
-assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\);?/)
+assert.match(code, /const\s+audio\s*=\s*new\s+Audio\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
index 2deb8d6e95a..758c0661d55 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65362bfd67d61d517deef191.md
@@ -34,7 +34,7 @@ assert.match(code, /userData\?\.songs\.find\(/)
 Your `find` method should have `song` as the parameter of its arrow function callback.
 
 ```js
-assert.match(code, /userData\?\.songs\.find\(\(?song\)?/)
+assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 Your `find` method should use strict equality to check if `song.id` is equal to `id`.
@@ -46,7 +46,7 @@ assert.match(code, /userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(so
 Your `find` method should be assigned to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\);?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.songs\.find\(\s*(\(\s*song\s*\)|song)\s*=>\s*(song\.id\s*===\s*id|id\s*===\s*song\.id)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
index fbda796d85a..2f9e1cca28f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653635c731206b718659d3d5.md
@@ -13,22 +13,22 @@ Also, set the `audio.title` property equal to `song.title`. This tells the audio
 
 # --hints--
 
-You should not modify the exist `playSong` function and its content.
+You should not modify the existing `playSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?/)
 ```
 
 You should set `audio.src` to `song.src`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?/)
 ```
 
 You should set `audio.title` to `song.title`.
 
 ```js
-assert.match(code, /const\s+playSong\s*=\s*\(id\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\(song\)\s=>\s*song\.id\s===\s*id\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
+assert.match(code, /const\s+playSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.songs\.find\(\s*\(\s*song\s*\)\s=>\s*song\.id\s===\s*id\s*\);?\s*audio\.src\s*=\s*song\.src;?\s*audio\.title\s*=\s*song\.title;?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
index ee06f90d4ac..d99cde2a89f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653639d63a45a077333312c8.md
@@ -17,13 +17,13 @@ Add an `if` statement to check whether the `userData?.currentSong` is `null` or
 You should create an `if` statement with the condition `userData?.currentSong === null || userData?.currentSong.id !== song.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*/)
 ```
 
 You should set `audio.currentTime` to `0` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
index 31baea291e3..4f05fb0cc4a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/653641509b6e7681a9333245.md
@@ -11,9 +11,11 @@ You need to update the current song being played as well as the appearance of th
 
 Start by accessing the `userData` object and its `currentSong` property. Set its value equal to the `song` variable.
 
+*Note*: You should not use the optional chaining operator `?.` in this step because `userData.currentSong` will not be `null` or `undefined` at this point.
+
 # --hints--
 
-You should set `userData.currentSong` to `song`.
+You should assign `song` to `userData.currentSong`.
 
 ```js
 assert.match(code, /userData\.currentSong\s*=\s*song;?/)
@@ -614,7 +616,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   --fcc-editable-region--
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
index 81c8489157e..5430c4791ff 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65364566e84e378837fbaf2a.md
@@ -7,9 +7,9 @@ dashedName: step-33
 
 # --description--
 
-You need to hook up the `playSong` function to a `click` event listener so the songs will start playing when the play button is clicked.
+In previous steps you built out the functionality for playing a song. Now you need to add the functionality to the play button so that it will play the current song when it is clicked on.
 
-Add a click event listener to the `playButton` element, then use arrow syntax to pass in a callback with an empty pair of curly braces.
+Use the `addEventListener()` method and pass in a `click` event for the first argument and an empty callback function with arrow syntax for the second argument, e.g., `() => {}`.
 
 # --hints--
 
@@ -22,13 +22,13 @@ assert.match(code, /playButton\.addEventListener\(/)
 Ваш слухач подій повинен слухати подію `click`.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback into your event listener. Don't forget you also need an empty pair of curly braces.
 
 ```js
-assert.match(code, /playButton\.addEventListener\(('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playButton\.addEventListener\(\s*('|"|`)click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
index 4120b14a686..2e19757df06 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65420b821b14f25a6b35c3b3.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+songsHTML/);
 You should assign `array.map()` to your `songsHTML`.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\)/);
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
index cd507f3430b..39379b60d48 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654210a9eda99477f5697a94.md
@@ -32,7 +32,7 @@ assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\
 You should interpolate `song.title` as the content of your `span` element.
 
 ```js
-assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\$\{song\.title\}\s*<\/span>\s*<\/button>/)
+assert.match(code, /<button\s*class\s*=\s*('|")playlist-song-info\1\s*>\s*<span\s*class\s*=\s*('|")playlist-song-title\2\s*>\s*\$\{\s*song\.title\s*\}\s*<\/span>\s*<\/button>/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
index 2c77333c340..b24f8390ebd 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654213f2fad2d48f74d6c239.md
@@ -24,7 +24,7 @@ assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*/)
 Your button element should have an `aria-label` attribute with the value `Delete ${song.title}` as its second attribute and value.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2\s*>/)
 ```
 
 You should paste in the provided `svg` as the content of your `button` element.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
index abad1da769a..782771cde99 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654215fe7b4a899ddceb3b60.md
@@ -24,7 +24,7 @@ Chain the `join()` method to your `map()` method and pass in an empty string for
 You should add `join("")` to the existing code.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\)\s*\.join\(('|")\3\);?/)
+assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-delete\1\s*aria-label\s*=\s*('|")Delete\s*\$\{song\.title\}\2>\s*<svg\s{1}width="20"\s{1}height="20"\s{1}viewBox="0\s{1}0\s{1}16\s{1}16"\s{1}fill="none"\s{1}xmlns="http:\/\/www\.w3\.org\/2000\/svg">\s*<circle\s{1}cx="8"\s{1}cy="8"\s{1}r="8"\s{1}fill="#4d4d62"\/>\s*<path\s{1}fill-rule="evenodd"\s{1}clip-rule="evenodd"\s{1}d="M5\.32587\s{1}5\.18571C5\.7107\s{1}4\.90301\s{1}6\.28333\s{1}4\.94814\s{1}6\.60485\s{1}5\.28651L8\s{1}6\.75478L9\.39515\s{1}5\.28651C9\.71667\s{1}4\.94814\s{1}10\.2893\s{1}4\.90301\s{1}10\.6741\s{1}5\.18571C11\.059\s{1}5\.4684\s{1}11\.1103\s{1}5\.97188\s{1}10\.7888\s{1}6\.31026L9\.1832\s{1}7\.99999L10\.7888\s{1}9\.68974C11\.1103\s{1}10\.0281\s{1}11\.059\s{1}10\.5316\s{1}10\.6741\s{1}10\.8143C10\.2893\s{1}11\.097\s{1}9\.71667\s{1}11\.0519\s{1}9\.39515\s{1}10\.7135L8\s{1}9\.24521L6\.60485\s{1}10\.7135C6\.28333\s{1}11\.0519\s{1}5\.7107\s{1}11\.097\s{1}5\.32587\s{1}10\.8143C4\.94102\s{1}10\.5316\s{1}4\.88969\s{1}10\.0281\s{1}5\.21121\s{1}9\.68974L6\.8168\s{1}7\.99999L5\.21122\s{1}6\.31026C4\.8897\s{1}5\.97188\s{1}4\.94102\s{1}5\.4684\s{1}5\.32587\s{1}5\.18571Z"\s{1}fill="white"\/>\s*<\/svg>\s*<\/button>\s*<\/li>\s*`;?\s*\}\s*\)\s*\.join\(\s*('|")\3\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
index 8c412727203..8673400245a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/654218753c255fabb81f57ca.md
@@ -35,7 +35,7 @@ Call the `renderSongs` function with the `songs` property of `userData`. This wi
 You should call your `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /renderSongs\(userData\?\.songs\)/)
+assert.match(code, /renderSongs\(\s*userData\?\.songs\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
index aa305a2eccb..ff96ed160c2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65422ba173a18b1bedef1bb6.md
@@ -9,20 +9,20 @@ dashedName: step-34
 
 Within the arrow function of the event listener, add an `if` to check if `userData?.currentSong` is `null`.
 
-Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData.songs` array. This will ensure the first song in the playlist is played first.
+Inside the `if` block, call the `playSong()` function with the `id` of the first song in the `userData?.songs` array. This will ensure the first song in the playlist is played first.
 
 # --hints--
 
 You should create an `if` statement with the condition `userData?.currentSong === null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside your `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
index 2eb8eac2e8c..9dba018689d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552127b2576c2fbc5ecc2ea.md
@@ -16,20 +16,20 @@ This ensures that the currently playing song will continue to play when the play
 Ви не повинні змінювати наявну інструкцію `if` та її вміст.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` block to your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `playSong` function with `userData?.currentSong.id` in the `else` block of your `if` statement.
 
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*playSong\(userData\?\.currentSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*playSong\(\s*userData\?\.currentSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -627,7 +627,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
index cbc421b9265..a1a52209a09 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521badc7b7470edf952372.md
@@ -28,13 +28,13 @@ assert.isFunction(pauseSong)
 Your `pauseSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `pauseSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
index ca18b596a51..a74bd1852f7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65521ec3bb117c195c4f6cb5.md
@@ -9,15 +9,17 @@ dashedName: step-38
 
 To store the current time of the song when it is paused, set the `songCurrentTime` of the `userData` object to the `currentTime` of the `audio` variable.
 
+*Note*: You should not use optional chaining for this step because `userData.songCurrentTime` will not be `null` or `undefined` at this point.
+
 # --hints--
 
 You should not modify the existing `pauseSong` function and its content.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
-You should set `userData.songCurrentTime` to `audio.currentTime`.
+You should assign `audio.currentTime` to `userData.songCurrentTime`.
 
 ```js
 assert.match(code, /userData\.songCurrentTime\s*=\s*audio\.currentTime;?/)
@@ -618,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
index e2e84915353..f9a535dd9ee 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655220a3fa5c3c200bc8e938.md
@@ -16,19 +16,19 @@ To finally pause the song, use the `pause()` method on the `audio` variable. `pa
 Ви не повинні змінювати наявну функцію `pauseSong` та її вміст.
 
 ```js
-assert.match(code, /const\s+pauseSong\s*=\s*\(\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+pauseSong\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\.songCurrentTime\s*=\s*audio\.currentTime;?\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `classList` property and the `remove()` method to remove the class `playing` from the `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.remove\(('|")playing\1\);?/)
+assert.match(code, /playButton\.classList\.remove\(\s*('|")playing\1\s*\);?/)
 ```
 
 You should use the `pause()` method on your `audio` variable.
 
 ```js
-assert.match(code, /audio\.pause\(\)/)
+assert.match(code, /audio\.pause\(\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
index 2898dd4012d..bfb3c91cead 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552303a9a78704f8ff072e9.md
@@ -22,13 +22,13 @@ assert.match(code, /pauseButton\.addEventListener\(/)
 Ваш слухач подій повинен слухати подію `click`.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `pauseSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /pauseButton\.addEventListener\(('|"|`)click\1,\s*pauseSong\)/)
+assert.match(code, /pauseButton\.addEventListener\(\s*('|"|`)click\1,\s*pauseSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
index 91d2d1e94fb..58b3c6c3987 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655235c2e607297f00316650.md
@@ -16,13 +16,13 @@ To finally play the song, use the `play()` method on the `audio` variable. `play
 You should use the `classList` property and the `add` method to add the class `playing` to `playButton`.
 
 ```js
-assert.match(code, /playButton\.classList\.add\(("|')playing\1\);?/)
+assert.match(code, /playButton\.classList\.add\(\s*("|')playing\1\s*\);?/)
 ```
 
 You should use the `play()` method on the `audio` variable.
 
 ```js
-assert.match(code, /audio\.play\(\);?/)
+assert.match(code, /audio\.play\(\s*\);?/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
 
   userData.currentSong = song;
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
index 72a9981ebb9..8ea1becc84f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6552385244ccf89b77d6b332.md
@@ -28,13 +28,13 @@ assert.isFunction(playNextSong)
 Your `playNextSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playNextSong` function  should be empty.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
index 6a40d4b0466..2e8df1ad23f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655243068222c2c1166b90b0.md
@@ -9,30 +9,30 @@ dashedName: step-44
 
 Inside the `playNextSong` function, create an `if` statement to check if the `currentSong` of `userData` is strictly equal to `null`. This will check if there's no current song playing in the `userData` object.
 
-If the condition is true, call the `playSong` function with the `id` of the first song in the `userData.songs` array as an argument.
+If the condition is true, call the `playSong` function with the `id` of the first song in the `userData?.songs` array as an argument.
 
 # --hints--
 
 You should not modify the existing `playNextSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playNextSong\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+playNextSong\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 Ви повинні створити інструкцію `if` з умовою `userData?.currentSong === null`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*/)
 ```
 
 You should call the `playSong` function with `userData?.songs[0].id` inside the `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -673,7 +673,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
index a06570f43eb..ef2929a433d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655476e1ff522252fdcce5e4.md
@@ -14,25 +14,25 @@ Add an `else` block to the `if` statement. Inside the `else` block, call the `ge
 You should not modify the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}/)
 ```
 
 You should add an `else` to the existing `if` statement.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 You should set the `currentSongIndex` constant to `getCurrentSongIndex()` inside the `else` block.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*\}/)
 ```
 
 
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -678,7 +678,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
index 75931f6fc84..52dc2d7f74d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655479aa3e1e0360ae38b7a6.md
@@ -18,25 +18,25 @@ Lastly, call the `playSong` function and pass in `nextSong.id` as the argument.
 You should not modify the existing `if` statement, its `else` block, and content.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex + 1]` to a `nextSong` constant.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `nextSong.id`.
 
 ```js
-const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);')
+const splitter = code.split('const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);')
 
-assert.match(splitter[0], /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{\s*playSong\(userData\?\.songs\[0\]\.id\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\];?\s*playSong\(nextSong\.id\);?\s*\}/)
+assert.match(splitter[0], /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{\s*playSong\(\s*userData\?\.songs\s*\[\s*0\s*\]\s*\.id\s*\);?\s*\}\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+nextSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*\+\s*1\s*\]\s*;?\s*playSong\(\s*nextSong\.id\s*\);?\s*\}/)
 ```
 
 
@@ -635,7 +635,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
index ce4d7a6eb2b..f842f844d29 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65547ee197840478a1b95f4b.md
@@ -22,13 +22,13 @@ assert.match(code, /nextButton\.addEventListener\(/)
 Ваш слухач подій повинен слухати подію `click`.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playNextSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /nextButton\.addEventListener\(('|"|`)click\1,\s*playNextSong\)/)
+assert.match(code, /nextButton\.addEventListener\(\s*('|"|`)click\1,\s*playNextSong\s*\)/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -675,7 +675,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
index c8ef44db782..8103c239ca7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554815fe2472f8bfdab7642.md
@@ -26,13 +26,13 @@ assert.isFunction(playPreviousSong)
 Your `playPreviousSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `playPreviousSong` function should be empty.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
index 8069fc689c1..8e5fb945e95 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655482742cc5499726e3f347.md
@@ -16,31 +16,31 @@ Inside the `else` block, create a constant named `currentSongIndex` and assign i
 You should not alter the existing `playPreviousSong` function and its content.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should have an `if` statement with the condition `userData?.currentSong === null` inside your `playPreviousSong` function.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*/)
 ```
 
 You should have `return` inside the block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*/)
 ```
 
 You should call `getCurrentSongIndex` and assign it to `currentSongIndex` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /const\s+playPreviousSong\s*=\s*\(\)\s*=>\s*\{\s*if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /const\s+playPreviousSong\s*=\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -695,7 +695,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
index 2d5c1e9f727..508c4af59c6 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655483ebf0096ba02b2c3d4c.md
@@ -14,19 +14,19 @@ To get the previous song, subtract `1` from the `currentSongIndex` of `userData?
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*/)
 ```
 
 You should assign `userData?.songs[currentSongIndex - 1]` to a `previousSong` constant.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*/)
 ```
 
 You should call the `playSong` function with `previousSong.id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\[currentSongIndex\s*-\s*1\];?\s*playSong\(previousSong\.id\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\)\s*\{?\s*return;?\s*\}?\s*else\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*const\s+previousSong\s*=\s*userData\?\.songs\s*\[\s*currentSongIndex\s*-\s*1\s*\]\s*;?\s*playSong\(\s*previousSong\.id\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
index 7c14d9eabee..856bd518df4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655485321913feabbc5f00f8.md
@@ -20,13 +20,13 @@ assert.match(code, /previousButton\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 You should pass in `playPreviousSong` as the second argument of your `addEventListener` method.
 
 ```js
-assert.match(code, /previousButton\.addEventListener\(('|"|`)click\1,\s*playPreviousSong\)/)
+assert.match(code, /previousButton\.addEventListener\(\s*('|"|`)click\1,\s*playPreviousSong\s*\)/)
 ```
 
 # --seed--
@@ -624,7 +624,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -683,7 +683,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
index 7eb05fe80fe..8c40d56015c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6554860ea4dfbab2f4786fc8.md
@@ -28,19 +28,19 @@ assert.isFunction(highlightCurrentSong)
 Your `highlightCurrentSong` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*/)
 ```
 
 You should create a `playlistSongElements` constant inside your `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*/)
 ```
 
 You should use the `querySelectorAll()` method to select the `.playlist-song` element and assign it to the `playlistSongElements` constant.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*\};?/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
index f68e3d5fdd5..b530d08bef4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655487f686aabfc2a10ba887.md
@@ -22,7 +22,7 @@ assert.isFunction(getCurrentSongIndex);
 Your `getCurrentSongIndex` function should use arrow syntax.
 
 ```js
-assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\)\s*=>\s*{\s*}\s*/);
+assert.match(code, /(let|const)\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*/);
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
index a5add7c3c30..f850a6077fa 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65548f747a4cdafd186948d1.md
@@ -16,7 +16,7 @@ Use `getElementById()` to get the `id` of the currently playing song, then use t
 You should not modify the existing `highlightCurrentSong` function and its content.
 
 ```js
-assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(('|")\.playlist-song\1\);?\s*/)
+assert.match(code, /const\s+highlightCurrentSong\s*=\s*\(\s*\)\s*=>\s*\s{\s*const\s+playlistSongElements\s*=\s*document\.querySelectorAll\(\s*('|")\.playlist-song\1\s*\);?\s*/)
 ```
 
 You should use `document.getElementById()` and pass in `` `song-${userData?.currentSong?.id}` ``.
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -692,7 +692,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
index b9f28d0c9de..1669e40b97a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655490f55c36900779336988.md
@@ -33,13 +33,13 @@ assert.match(code, /playlistSongElements\.forEach\(/)
 Your `forEach()` method should have a `songEl` parameter and use arrow syntax.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*/)
 ```
 
 Your `forEach` should have an empty pair of curly braces.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\(?songEl\)?\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(\(songEl\s*\)|songEl)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -637,7 +637,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
index 7a84aaa307c..f72b209407f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655492e6b90c7a198c587943.md
@@ -16,19 +16,19 @@ Create an `if` statement with the condition `songToHighlight`. For the statement
 You should create an `if` statement with the condition `songToHighlight`.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*/)
 ```
 
 You should use the `setAttribute()` method on `songToHighlight` inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(/)
 ```
 
 You should pass in `"aria-current"` and `"true"` as the first and second argument of your `setAttribute` method.
 
 ```js
-assert.match(code, /if\s*\(songToHighlight\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\)\s*;?\s*\}?/)
+assert.match(code, /if\s*\(\s*songToHighlight\s*\)\s*\{?\s*songToHighlight\.setAttribute\(\s*('|")aria-current\1\s*,\s*('|")true\2\s*\)\s*;?\s*\}?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
index c3ae05436b7..7ea8934c907 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655494d5a15d6a2567e1ea60.md
@@ -16,7 +16,7 @@ After that, play around with the control buttons to see how the `highlightCurren
 You should call the `highlightCurrentSong` function.
 
 ```js
-assert.match(code, /highlightCurrentSong\(\)/)
+assert.match(code, /highlightCurrentSong\(\s*\)/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -688,7 +688,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
index ec8cb00d61a..f9531b43d55 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655495a6bd96e42bc3baa795.md
@@ -26,13 +26,13 @@ assert.isFunction(setPlayerDisplay)
 Your `setPlayerDisplay` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayerDisplay` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
index 921fb757d6e..43a35257e45 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d17af9ff06a14d399f6d.md
@@ -16,31 +16,31 @@ Access the `#player-song-title` and `#player-song-artist` elements with the `get
 You should not modify the existing `setPlayerDisplay` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayerDisplay\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use `document.getElementById()` to get the `#player-song-title` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should assign the `#player-song-title` element to the variable `playingSong`. Не забувайте використовувати `const` для оголошення змінної.
 
 ```js
-assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\);?/);
+assert.match(code, /const\s+playingSong\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-title\1\s*\);?/);
 ```
 
 You should use `document.getElementById()` to get the `#player-song-artist` element.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 You should assign the `#player-song-artist` element to the variable `songArtist`. Не забувайте використовувати `const` для оголошення змінної.
 
 ```js
-assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\);?/);
+assert.match(code, /const\s+songArtist\s*\=\s*document\.getElementById\(\s*('|"|`)player\-song\-artist\1\s*\);?/);
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -716,7 +716,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
index 0f0face2b86..270f9e512d2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d458687cb3b357834df9.md
@@ -630,7 +630,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -710,7 +710,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
index 8d7d54b1ed8..b40e0475c17 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d729c9bfd7c3195f1948.md
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -725,7 +725,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
index baddae3349e..ad62c356fc9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d7e384056dc9c581fadf.md
@@ -16,7 +16,7 @@ Now you should see the song title and the artist show up in the display.
 You should call the `setPlayerDisplay` function inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayerDisplay\(\);?/)
+assert.match(code, /setPlayerDisplay\(\s*\);?/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -699,7 +699,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
index 9182f27ff3a..d31a44cda47 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555d8faed60b9d3e4a6cefb.md
@@ -28,13 +28,13 @@ assert.isFunction(setPlayButtonAccessibleText)
 Your `setPlayButtonAccessibleText` function should use an arrow syntax.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `setPlayButtonAccessibleText` function  should be empty.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -719,7 +719,7 @@ const renderSongs = (array) => {
 
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
index 71d353ca4db..131b102672d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555dd138e70cae6b546966d.md
@@ -16,19 +16,19 @@ Don't forget to use optional chaining.
 You should not modify the existing `setPlayButtonAccessibleText` and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should access `userData?.currentSong` or `userData?.songs[0]`.
 
 ```js
-assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 You should assign `userData?.currentSong || userData?.songs[0]` to a `song` constant.
 
 ```js
-assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?/)
+assert.match(code, /const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -715,7 +715,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
index 956f70421c2..4707b1bae16 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555de565387a2efe90a6ccc.md
@@ -16,7 +16,7 @@ Don't forget you need template interpolation here, so you need to use backticks.
 You should not modify the existing `setPlayButtonAccessibleText` function and its content.
 
 ```js
-assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\[0\];?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+setPlayButtonAccessibleText\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+song\s*=\s*userData\?\.currentSong\s*\|\|\s*userData\?\.songs\s*\[\s*0\s*\]\s*;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should use the `setAttribute()` method on `playButton`.
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
 };
 --fcc-editable-region--
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
index 970d7c768f2..44321017d04 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e04aeb225bfbae237344.md
@@ -14,7 +14,7 @@ Now, call the `setPlayButtonAccessibleText` function inside the `playSong` funct
 You should call the `setPlayButtonAccessibleText` inside your `playSong` function.
 
 ```js
-assert.match(code, /setPlayButtonAccessibleText\(\);?/)
+assert.match(code, /setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -707,7 +707,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
index 234f779ade8..319a1b9ab80 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e0bfe4d69904410f7cd3.md
@@ -28,13 +28,13 @@ assert.isFunction(shuffle)
 Your `shuffle` function should use an arrow syntax and should not take a parameter.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Your `shuffle` function  should be empty.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\n?\s*?\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\n?\s*?\};?/)
 ```
 
 # --seed--
@@ -632,7 +632,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -729,7 +729,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
index b7cb3a8db61..bcd89f93c5d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e39a5f4c6f138c7d9405.md
@@ -24,7 +24,7 @@ Use the `sort()` method on the `userData?.songs` array. Pass a callback to the m
 You should not modify the existing `shuffle` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*{\s*[\s\S]*?\};?/);
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*{\s*[\s\S]*?\};?/);
 ```
 
 You should use the `sort()` method on `userData?.songs`.
@@ -42,7 +42,7 @@ assert.match(code, /userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*/)
 The callback of your `sort()` method should return `Math.random() - 0.5`.
 
 ```js
-assert.match(code, /userData\?.songs\.sort\s*\(\(\)\s*=>(\s*{\s*return\s+Math\.random\(\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\)\s*-\s*0\.5\s*)\);?/);
+assert.match(code, /userData\?.songs\.sort\s*\(\s*\(\s*\)\s*=>(\s*{\s*return\s+Math\.random\(\s*\)\s*-\s*0\.5\s*;?\s*}\s*)|(\s*Math\.random\(\s*\)\s*-\s*0\.5\s*)\s*\);?/);
 ```
 
 # --seed--
@@ -640,7 +640,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -739,7 +739,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
index 004f92fc193..f9af983590f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e57d3e6d9d221c4735be.md
@@ -11,6 +11,8 @@ When the shuffle button is pressed, you want to set the `currentSong` to nothing
 
 Set `userData.currentSong` to `null` and `userData.songCurrentTime` to `0`.
 
+*Note*: You should not use optional chaining for this step because you are explicitly setting the `currentSong` and `songCurrentTime` properties to be `null` and `0` respectively.
+
 # --hints--
 
 You should set `userData.currentSong` to `null`.
@@ -620,7 +622,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -720,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
index 3ddf3a03d8b..ba01d60ddc0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e6cec786da2aadc11ea0.md
@@ -16,31 +16,31 @@ Call the `renderSongs` function and pass in `userData?.songs` as an argument. Al
 You should not modify the existing `shuffle` function and its content.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `pauseSong` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*.*\s*\};?/)
 ```
 
 Ви повинні викликати функцію `setPlayButtonAccessibleText`.
 
 ```js
-assert.match(code, /const\s+shuffle\s*=\s*\(\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\(\)\s*=>\s*Math\.random\(\)\s*-\s*0\.5\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(userData\?\.songs\);?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+shuffle\s*=\s*\(\s*\)\s*=>\s*\{\s*userData\?\.songs\.sort\(\s*\(\s*\)\s*=>\s*Math\.random\(\s*\)\s*-\s*0\.5\s*\);?\s*userData\.currentSong\s*=\s*null;\s*userData\.songCurrentTime\s*=\s*0;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -741,7 +741,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
index 5715583c244..10529b83443 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e7acdbae972d3e8e0f5b.md
@@ -22,13 +22,13 @@ assert.match(code, /shuffleButton\.addEventListener\(/)
 Ваш слухач подій повинен слухати подію `click`.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 You should pass in `shuffle` as the second value of your `click` event listener.
 
 ```js
-assert.match(code, /shuffleButton\.addEventListener\(('|")click\1,\s*shuffle\);?/)
+assert.match(code, /shuffleButton\.addEventListener\(\s*('|")click\1,\s*shuffle\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
index 7f35dc1c15e..69cc44da122 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555e9197bf1d7416bdd76e0.md
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -746,7 +746,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
index cba1876c461..d119430f057 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6555ebf07ec610585a626f72.md
@@ -7,7 +7,7 @@ dashedName: step-73
 
 # --description--
 
-Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData.songs` array.
+Use the `filter()` method to remove the song object that matches the `id` parameter from the `userData?.songs` array.
 
 The `filter` method keeps only the elements of an array that satisfy the callback function passed to it:
 
@@ -20,12 +20,14 @@ console.log(numsGreaterThanThree) // Output: [10, 8, 4, 5]
 
 Use the `filter()` method on `userData?.songs`. Pass in `song` as the parameter of the arrow function callback and use implicit return to check if `song.id` is strictly not equal to `id`. Assign all of that to the `userData.songs`.
 
+*Note*: You should not use optional chaining when you assign the result of  `userData?.songs.filter` to `userData.songs` because the `allSongs` array will not be `undefined` or `null` at that point.
+
 # --hints--
 
 You should not modify the existing `deleteSong` function.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*.*\s*\};?/)
 ```
 
 You should use the `filter()` method on `userData?.songs`.
@@ -647,7 +649,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -757,7 +759,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
index dcd52ef3fb9..48d2dbb31da 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65571e742fbf4532d8f98e90.md
@@ -18,25 +18,25 @@ After that, call the `highlightCurrentSong` function to highlight the current so
 You should not modify the existing `deleteSong` function and its content.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 Ви повинні викликати функцію `renderSongs` з `userData?.songs`.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\};?/)
 ```
 
 Ви повинні викликати функцію `highlightCurrentSong`.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*.*\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*.*\s*\};?/)
 ```
 
 Ви повинні викликати функцію `setPlayButtonAccessibleText`.
 
 ```js
-assert.match(code, /const\s+deleteSong\s*=\s*\(id\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\(song\)\s*=>\s*song\.id\s*!==\s*id\);?\s*renderSongs\(userData\?\.songs\);?\s*highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?\s*\};?/)
+assert.match(code, /const\s+deleteSong\s*=\s*\(\s*id\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*userData\?\.songs\.filter\(\s*\(\s*song\s*\)\s*=>\s*song\.id\s*!==\s*id\s*\);?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*\};?/)
 ```
 
 # --seed--
@@ -634,7 +634,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -745,7 +745,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
index 5c78fb2179b..ab2ebd3291f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655720534347cb3f31cdfb3d.md
@@ -16,7 +16,7 @@ Use an `if` statement to check if the `userData?.currentSong?.id` is equal to th
 You should create an empty `if` statement with the condition `userData?.currentSong?.id === id`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -730,7 +730,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
index 997a6c668ae..9e92cbbd5fd 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572399a8e16d50bc2c1ff3.md
@@ -16,31 +16,31 @@ After that, call the `pauseSong()` function to stop the playback and the `setPla
 Ви не повинні змінювати наявну інструкцію `if` та її вміст.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*.*\s*.*\s*.*\s*.*\s*\}/)
 ```
 
-Ви повинні встановити `userData.currentSong` на `null`.
+You should set `userData.currentSong` to `null`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
-Ви повинні встановити `userData.songCurrentTime` на `0`.
+You should set `userData.songCurrentTime` to `0`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*.*\s*.*\s*\}/)
 ```
 
 Ви повинні викликати функцію `pauseSong`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*.*\s*\}/)
 ```
 
 Ви повинні викликати функцію `setPlayerDisplay`.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\?\.id\s*===\s*id\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\);?\s*setPlayerDisplay\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\?\.id\s*===\s*id\s*\)\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*pauseSong\(\s*\);?\s*setPlayerDisplay\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -755,7 +755,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
index 509d1cdae18..14083f4abc1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655724bac464795a0ad91082.md
@@ -9,14 +9,14 @@ dashedName: step-78
 
 Next, you need to check if the playlist is empty. If it is, you should reset the `userData` object to its original state.
 
-Use an `if` statement to check if the `userData.songs` has a length of `0`.
+Use an `if` statement to check if the `userData?.songs` has a length of `0`.
 
 # --hints--
 
-You should create an empty `if` statement with the condition `userData.songs.length === 0`
+You should create an empty `if` statement with the condition `userData?.songs.length === 0`.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -738,7 +738,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
index fa7abfefeb9..ec66bdb6210 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655727b2e1e49d6adf584442.md
@@ -33,19 +33,19 @@ Inside your `if` statement, declare a `resetButton` constant, then use `createEl
 Ви не повинні змінювати наявну інструкцію `if` та її вміст.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*.*\s*\}/)
 ```
 
 You should use the `createElement` method to create a `button`.
 
 ```js
-assert.match(code, /document\.createElement\(('|")button\1\);?/)
+assert.match(code, /document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 You should assign your newly created `button` element to a `resetButton` constant.
 
 ```js
-assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?/)
+assert.match(code, /const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?/)
 ```
 
 # --seed--
@@ -643,7 +643,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -708,7 +708,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
 
   }
 --fcc-editable-region--
@@ -769,7 +769,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
index 39776939b29..012c72e0f98 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655729e68e49b277a6b448bd.md
@@ -18,7 +18,7 @@ Set the `id` attribute of `resetButton` to `reset` and its `aria-label` attribut
 Ви не повинні змінювати наявну інструкцію `if` та її вміст.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*.*\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*.*\s*.*\s*\}/)
 ```
 
 You should use `resetButton.id` to create an `id` attribute named `reset` for the `resetButton`.
@@ -628,7 +628,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
index 09171befd5e..5eedcb3a9a3 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572bb34a7e488224b937fc.md
@@ -32,7 +32,7 @@ assert.match(code, /resetButton\.appendChild\(/)
 You should pass in `resetText` as the value of your first `appendChild()`.
 
 ```js
-assert.match(code, /resetButton\.appendChild\(resetText\);?/)
+assert.match(code, /resetButton\.appendChild\(\s*resetText\s*\);?/)
 ```
 
 You should use the `appendChild()` method on `playlistSongs`.
@@ -44,7 +44,7 @@ assert.match(code, /playlistSongs\.appendChild\(/)
 You should pass in `resetButton` as the value of your second `appendChild()`.
 
 ```js
-assert.match(code, /playlistSongs\.appendChild\(resetButton\);?/)
+assert.match(code, /playlistSongs\.appendChild\(\s*resetButton\s*\);?/)
 ```
 
 # --seed--
@@ -642,7 +642,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -706,7 +706,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -773,7 +773,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
index 351516bee16..cbf8cfd1800 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65572e5aaf022790fb4a81b1.md
@@ -22,13 +22,13 @@ assert.match(code, /resetButton\.addEventListener\(/)
 Your `resetButton` event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1/)
 ```
 
 The callback function of your event listener should use arrow syntax and have an empty pair of curly braces.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -626,7 +626,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -690,7 +690,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -760,7 +760,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
index 6c08e091e7f..e6638f756ca 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655737cd004591b0271d6826.md
@@ -7,22 +7,22 @@ dashedName: step-84
 
 # --description--
 
-You need to assign the `userData.songs` property to the initial `allSongs` array. This will reset the playlist to its original state.
+To reset the playlist to its original state, spread `allSongs` into an array and assign it to `userData.songs`.
 
-Spread `allSongs` into an array and assign it to `userData.songs`.
+*Note*: You should not use optional chaining for the `userData.songs` because the song will not be `null` or `undefined` at this point.
 
 # --hints--
 
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*\}\s*\);?/)
 ```
 
 You should assign `[...allSongs]` to `userData.songs`.
 
 ```js
-assert.match(code, /userData\.songs\s*=\s*\[\.\.\.allSongs\]/)
+assert.match(code, /userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]/)
 ```
 
 # --seed--
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -684,7 +684,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -757,7 +757,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
index 5b222f8e6cb..2cd35595f4b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573a97c59ddbbf028ca95e.md
@@ -22,25 +22,25 @@ Remove the reset button from the playlist by calling the `remove()` method on th
 You should not modify the existing event listener and its content.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*.*\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*.*\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should call the `renderSongs` function with `userData?.songs`.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 Ви повинні викликати функцію `setPlayButtonAccessibleText`.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
 You should use the `remove()` method to remove the `resetButton` from the DOM.
 
 ```js
-assert.match(code, /resetButton\.addEventListener\(('|")click\1,\s*\(\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\.\.\.allSongs\];?\s*renderSongs\(userData\?\.songs\);?\s*setPlayButtonAccessibleText\(\);?\s*resetButton\.remove\(\);?\s*\}\);?/)
+assert.match(code, /resetButton\.addEventListener\(\s*('|")click\1,\s*\(\s*\)\s*=>\s*\{\s*userData\.songs\s*=\s*\[\s*\.\.\.allSongs\s*\]\s*;?\s*renderSongs\(\s*userData\?\.songs\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?\s*resetButton\.remove\(\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -702,7 +702,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -776,7 +776,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
index 2da3792cc81..b6768e023cb 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65573d0abe4d38cd6fa13f44.md
@@ -24,13 +24,13 @@ assert.match(code, /audio\.addEventListener\(/)
 The event listener you used on on your `audio` variable should listen for an `ended` event.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1/)
 ```
 
 You should use arrow syntax to pass in an empty callback to your `ended` event listener.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 
@@ -629,7 +629,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -693,7 +693,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -768,7 +768,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
index b7c4a2e1b62..3a250374257 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/6557421eb6a7a0f0500e3106.md
@@ -7,14 +7,14 @@ dashedName: step-77
 
 # --description--
 
-Within the button element in the `renderSongs` function, add an `onclick` attribute as the first attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
+Within the button element in the `renderSongs` function, add an `onclick` attribute. For the value, call the `deleteSong` function and interpolate `song.id`.
 
 # --hints--
 
-You should add an `onclick` attribute as the first attribute of the delete button and pass in `deleteSong(${song.id})`.
+You should add an `onclick` attribute to the delete button and pass in `deleteSong(${song.id})`.
 
 ```js
-assert.match(code, /<button\s+onclick=('|")deleteSong\(\$\{song\.id\}\)\1\s*class=('|")playlist-song-delete\2\s*aria-label=('|")Delete\s*\$\{song\.title\}\3\s*>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")deleteSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -612,7 +612,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
index 306f1a1da26..6a4905a2865 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b49333d9f265bc1512152.md
@@ -7,30 +7,35 @@ dashedName: step-87
 
 # --description--
 
-Notice that the album art in the HTML and songs in the `allSongs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
+Notice that the album art in the HTML and songs in the `userData.songs` array have changed. We've swapped out the original songs for shorter ones that you can use to test your app in the upcoming steps.
 
 Next, you need to check if there is a next song to play. Retrieve the current song index by calling the `getCurrentSongIndex()` function, and save it in a `currentSongIndex` constant.
 
-After that, create a `nextSongExists` constant that checks if a next song exists.
+After that, create a `nextSongExists` constant that contains the boolean value `true` or `false` depending on if the next song exists.
 
 # --hints--
 
 You should not modify the existing `ended` event listener and its content.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*.*\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*.*\s*.*\s*\}\s*\);?/)
 ```
 
 You should create a `currentSongIndex` constant and set it to the calling of the `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /audio\.addEventListener\(('|")ended\1,\s*\(\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\);?\s*.*\s*\}\);?/)
+assert.match(code, /audio\.addEventListener\(\s*('|")ended\1,\s*\(\s*\)\s*=>\s*\{\s*const\s+currentSongIndex\s*=\s*getCurrentSongIndex\(\s*\);?\s*.*\s*\}\s*\);?/)
 ```
 
-You should check if a next song exists with `userData?.songs[currentSongIndex + 1] !== undefined` and set it to a `nextSongExists` constant.
+You should check if a next song exists comparing `userData.songs.length` and `currentSongIndex` and set it to a `nextSongExists` constant. If the last index of the songs array (`userData.songs.length - 1`) is bigger than the currentSongIndex that means there is a next song.
 
 ```js
-assert.match(code, /const\s+nextSongExists\s*=\s*userData\?\.songs\[currentSongIndex\s*\+\s*1\]\s*!==\s*undefined;?/)
+const secondPart = code.split(`audio.addEventListener("ended", () => {`)[1];
+const middlePart = secondPart.split("});")[0]
+const codeOutputFirstTest = eval(middlePart + "\nnextSongExists;");
+assert.strictEqual(codeOutputFirstTest, true);
+const codeOutputSecondTest = eval(`\nfunction getCurrentSongIndex() { return 100; };\n` + middlePart + "\nnextSongExists;")
+assert.strictEqual(codeOutputSecondTest, false);
 ```
 
 # --seed--
@@ -593,7 +598,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -657,7 +662,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -732,7 +737,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
index dcb76601109..4792b90c2c8 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4bbff1dbf66cb2ed4dac.md
@@ -14,13 +14,13 @@ Use an `if` statement to check if `nextSongExists` exists, then call the `playNe
 You should create an `if` statement with the condition `nextSongExists`.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*/)
 ```
 
 You should call the `playNextSong` function inside your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}/)
 ```
 
 # --seed--
@@ -583,7 +583,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -647,7 +647,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -722,7 +722,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
index 225350f40b3..71a90c23903 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4c8f636d9675953a0388.md
@@ -14,25 +14,25 @@ If there is no next song in the playlist, use the `else` block to reset the `cur
 You should not modify the existing `if` statement and its content.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*.*\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*.*\s*.*\s*.*\s*\};?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*.*\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `currentSong` property of `userData` to `null` in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*.*\s*\};?/)
 ```
 
 You should use dot notation to set the `songCurrentTime` property of `userData` to `0` in the `else` block of your `if`statement.
 
 ```js
-assert.match(code, /if\s*\(nextSongExists\)\s*\{\s*playNextSong\(\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
+assert.match(code, /if\s*\(\s*nextSongExists\s*\)\s*\{\s*playNextSong\(\s*\);?\s*\}\s*else\s*\{\s*userData\.currentSong\s*=\s*null;?\s*userData\.songCurrentTime\s*=\s*0;?\s*\};?/)
 ```
 
 # --seed--
@@ -595,7 +595,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -659,7 +659,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -734,7 +734,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
index 293c555386b..26c627f80b5 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/655b4dad1d38ff7cdd65cbfe.md
@@ -17,28 +17,28 @@ You should call the `pauseSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /pauseSong\(\);?/)
+assert.match(splitter[1], /pauseSong\(\s*\);?/)
 ```
 
 You should call the `setPlayerDisplay` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /setPlayerDisplay\(\);?/)
+assert.match(splitter[1], /setPlayerDisplay\(\s*\);?/)
 ```
 
 You should call the `highlightCurrentSong` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?/)
 ```
 
 You should call the `setPlayButtonAccessibleText` function.
 
 ```js
 const splitter = code.split('audio.addEventListener("ended", () => {')
-assert.match(splitter[1], /highlightCurrentSong\(\);?\s*setPlayButtonAccessibleText\(\);?/)
+assert.match(splitter[1], /highlightCurrentSong\(\s*\);?\s*setPlayButtonAccessibleText\(\s*\);?/)
 ```
 
 # --seed--
@@ -636,7 +636,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -700,7 +700,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -775,7 +775,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
@@ -1418,7 +1418,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -1482,7 +1482,7 @@ const deleteSong = (id) => {
   highlightCurrentSong(); 
   setPlayButtonAccessibleText(); 
 
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
     const resetText = document.createTextNode("Reset Playlist");
 
@@ -1557,7 +1557,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
index 6226488d3e4..0cddaad5356 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656071d679089ebd9d5035a0.md
@@ -26,7 +26,7 @@ Inside the `userData` object create a `songs` property. For the value, spread `a
 Your `userData` object should have a `songs` key set to `[...allSongs]`.
 
 ```js
-assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\],?/);
+assert.match(code, /songs\s*:\s*\[\s*\.\.\.allSongs\s*\]\s*,?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
index 4efd77ba908..6f90cb8a76b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656073a2b98232c8aca72267.md
@@ -14,7 +14,7 @@ To handle the current song's information and track its playback time, create a `
 You should not modify the existing `userData` object and its content.
 
 ```js
-assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\.\.\.allSongs\],?\s*/);
+assert.match(code, /let\s+userData\s*=\s*\{\s*songs:\s*\[\s*\.\.\.allSongs\s*\]\s*,?\s*/);
 ```
 
 Your `userData` object should have a `currentSong` key set to `null`.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
index c19d571b383..81522736e1a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/656472ed8f552d2f2b3f7883.md
@@ -9,26 +9,26 @@ dashedName: step-30
 
 Add an `else` block to handle the current song's position in the playlist.
 
-Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData.songCurrentTime`.
+Within the `else` block, set the `currentTime` property of the `audio` object to the value stored in `userData?.songCurrentTime`.
 
 # --hints--
 
 Ви не повинні змінювати наявну інструкцію `if` та її вміст.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}/)
 ```
 
 You should add an `else` block to the existing `if` block.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{/)
 ```
 
-You should set `audio.currentTime` to `userData.songCurrentTime` inside the `else` block of your `if` statement.
+You should set `audio.currentTime` to `userData?.songCurrentTime` inside the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\.songCurrentTime;?\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.currentSong\s*===\s*null\s*\|\|\s*userData\?\.currentSong\.id\s*!==\s*song\.id\s*\)\s*\{\s*audio\.currentTime\s*=\s*0;?\s*\}\s*else\s*{\s*audio\.currentTime\s*=\s*userData\?\.songCurrentTime;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
index 2701f37dafd..6f2c4b4a634 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65671421254eeb489875cdd8.md
@@ -20,7 +20,7 @@ assert.match(code, /playlistSongElements\.forEach\(\s*(\(\s*songEl\s*\)|songEl)\
 You should use the `removeAttribute()` method on `songEl` and pass in `"aria-current"`.
 
 ```js
-assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(('|")aria-current\1\);?\s*\}\);?/)
+assert.match(code, /playlistSongElements\.forEach\(\s*(?:\(\s*songEl\s*\)|songEl)\s*=>\s*\{\s*songEl\.removeAttribute\(\s*('|")aria-current\1\s*\);?\s*\}\s*\);?/)
 ```
 
 
@@ -620,7 +620,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -691,7 +691,7 @@ const renderSongs = (array) => {
   playlistSongs.innerHTML = songsHTML;
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
index 962cdea4f92..d04f7e34fa1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672136535209761a5cf02b.md
@@ -13,10 +13,10 @@ Don't forget you need to interpolate with the dollar sign here.
 
 # --hints--
 
-You should add an `onclick` with the value `playSong(${song.id})` as the second attribute and value of the `button` element.
+You should add an `onclick` attribute with the value `playSong(${song.id})` to the `button` element.
 
 ```js
-assert.match(code, /<button\s+class\s*=\s*('|")playlist-song-info\1\s*onclick\s*=\s*('|")playSong\(\$\{song\.id\}\)\2\s*>\s*<span\s+class\s*=\s*('|")playlist-song-title\3\s*>\$\{song\.title\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-artist\4\s*>\$\{song\.artist\}<\/span>\s*<span\s+class\s*=\s*('|")playlist-song-duration\5\s*>\$\{song\.duration\}<\/span>\s*<\/button>/)
+assert.match(code, /<button(?:\s+|\s+.*\s+)onclick\s*=\s*('|")playSong\(\s*\$\{song\.id\}\s*\)\1(?:\s+.*|)>/)
 ```
 
 # --seed--
@@ -614,7 +614,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
index 32264274f01..1eef173619c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65672adafbaa37a6cef886f7.md
@@ -28,19 +28,19 @@ Use the `createTextNode()` method to create a `Reset Playlist` text, then assign
 Ви не повинні змінювати наявну інструкцію `if` та її вміст.
 
 ```js
-assert.match(code, /if\s*\(userData\.songs\.length\s*===\s*0\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(('|")button\1\);?\s*.*\s*\}/)
+assert.match(code, /if\s*\(\s*userData\?\.songs\.length\s*===\s*0\s*\)\s*\{\s*const\s+resetButton\s*=\s*document\.createElement\(\s*('|")button\1\s*\);?\s*.*\s*\}/)
 ```
 
 You should use `document.createTextNode()` to create a `Reset Playlist` text.
 
 ```js
-assert.match(code, /document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 You should assign your created text node to a `resetText` constant.
 
 ```js
-assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(('|")Reset\s+Playlist\1\);?/)
+assert.match(code, /const\s+resetText\s*=\s*document\.createTextNode\(\s*('|")Reset\s+Playlist\1\s*\);?/)
 ```
 
 # --seed--
@@ -638,7 +638,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
@@ -703,7 +703,7 @@ const deleteSong = (id) => {
   setPlayButtonAccessibleText(); 
 
 --fcc-editable-region--
-  if (userData.songs.length === 0) {
+  if (userData?.songs.length === 0) {
     const resetButton = document.createElement("button");
 
 
@@ -766,7 +766,7 @@ const setPlayButtonAccessibleText = () => {
   );
 };
 
-const getCurrentSongIndex = () => userData?.songs.indexOf(userData.currentSong);
+const getCurrentSongIndex = () => userData?.songs.indexOf(userData?.currentSong);
 
 playButton.addEventListener("click", () => {
     if (userData?.currentSong === null) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
index 267eaba0b02..8af4c7fc803 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/657b2b0b6a48071a6db28e7a.md
@@ -23,13 +23,13 @@ Pass in a callback function to the `map()` method. The callback function should
 The callback function of your `map()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?.*\)?\s*=>\s*\{\s*\}\)/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(.*\)|[^()]+)\s*=>\s*\{\s*\}\s*\)/)
 ```
 
 Your `map()` method should have a `song` parameter in it's callback function.
 
 ```js
-assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\(?song\)?/)
+assert.match(code, /const\s+songsHTML\s*=\s*array\.map\(\s*(\(\s*song\s*\)|song)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
index 2d423ddca69..739a17e8afa 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/659b0093d7db5a1a1122b7bd.md
@@ -14,20 +14,20 @@ const animals = ["dog", "cat", "horse"];
 animals.indexOf("cat") // 1
 ```
 
-Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData.currentSong`.
+Inside your `getCurrentSongIndex` function, return `userData?.songs.indexOf()`. For the `indexOf()` argument, set it to `userData?.currentSong`.
 
 # --hints--
 
 You should return `userData?.songs.indexOf()` inside your `getCurrentSongIndex` function.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\()|(\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(|\s*{\s*return?\s+userData\?\.songs\.indexOf\()/)
 ```
 
-You should pass in `userData.currentSong` into the `indexOf()` method.
+You should pass in `userData?.currentSong` into the `indexOf()` method.
 
 ```js
-assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\)\s*=>(\s*userData\?\.songs\.indexOf\(userData\.currentSong\);?)|(\s*{\s*return\s+userData\?\.songs\.indexOf\(userData\.currentSong\);?)/)
+assert.match(code, /const\s+getCurrentSongIndex\s*=\s*\(\s*\)\s*=>(\s*userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?|\s*{\s*return\s+userData\?\.songs\.indexOf\(\s*userData\?\.currentSong\s*\);?\s*})/)
 ```
 
 # --seed--
@@ -625,7 +625,7 @@ const playSong = (id) => {
   if (userData?.currentSong === null || userData?.currentSong.id !== song.id) {
     audio.currentTime = 0;
   } else {
-    audio.currentTime = userData.songCurrentTime;
+    audio.currentTime = userData?.songCurrentTime;
   }
   userData.currentSong = song;
   playButton.classList.add("playing");
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
index 719b44e55d8..1ae2bfcdfdc 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-basic-string-and-array-methods-by-building-a-music-player/65a608b7e7c75a04ccf0c23c.md
@@ -23,7 +23,7 @@ Add the `sort()` method to `userData?.songs`.
 You should add the `sort()` method to `userData?.songs`.
 
 ```js
-assert.match(code, /userData\?\.songs\.sort\(*.\);?/);
+assert.match(code, /userData\?\.songs\.sort\(.*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
index 7c71cff8b92..bcb6cc4de04 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641d9a19bff38d34d5a5edb8.md
@@ -18,25 +18,25 @@ The variables will not change, so use `const` to declare them.
 Ви повинні використати `document.getElementById()`, щоб отримати елемент `#author-container`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 You should assign the `#author-container` element to the variable `authorContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\)/);
+assert.match(code, /const\s+authorContainer\s*\=\s*document\.getElementById\(\s*('|"|`)author\-container\1\s*\)/);
 ```
 
 Ви повинні використати `document.getElementById()`, щоб отримати елемент `#load-more-btn`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 You should assign the `#load-more-btn` element to the variable `loadMoreBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\)/);
+assert.match(code, /const\s+loadMoreBtn\s*\=\s*document\.getElementById\(\s*('|"|`)load\-more\-btn\1\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
index b745ad68586..7a5fbc20731 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da3c6b6fbd742bff6ee40.md
@@ -22,13 +22,13 @@ Make a `GET` request to this URL: `https://cdn.freecodecamp.org/curriculum/news-
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should not have a semi-colon after your `fetch` call.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
index 4c7208ff903..4b8a1524daa 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da42481d90c4314c99e94.md
@@ -27,37 +27,37 @@ Again, don't terminate the code with a semi-colon yet.
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain the `.then()` method to your `fetch()` syntax
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(/)
 ```
 
 You should add a `res` parameter to your `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)/)
 ```
 
 Your `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*/)
 ```
 
 You should log the `res` parameter to the console so you can see the `Response` object.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\);/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
index a65b7107275..72e6ad1acbc 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da465273051435d332b15.md
@@ -16,19 +16,19 @@ Remove `console.log(res)` and implicitly return `res.json()` instead.
 You should remove the `console.log(res)`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*console\.log\(res\)\)/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*console\.log\(\s*res\s*\)\s*\)/)
 ```
 
 You should implicitly return `res.json()` in your `.then()`.
 
 ```js
-assert.match(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\)/)
+assert.match(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)/)
 ```
 
 You should not have a semi-colon after your `.then()`.
 
 ```js
-assert.notMatch(code, /\.then\(\(?res\)?\s*=>\s*res\.json\(\)\);/)
+assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\);/)
 ```
 
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
index 5d2a594ce72..d80e03c1e17 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da4b16937be43ba24c63d.md
@@ -17,7 +17,7 @@ Chain another `.then()` to the existing `.then()` method. This time, pass in `da
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 Your first `.then()` should not have a semi-colon.
@@ -29,37 +29,37 @@ assert.notMatch(code, /\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not not have semi-colon after it.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\)\s*;?\s*\}\s*\)\s*;/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
index 55ada70fc53..65f1de9dbfa 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da51a9810e74411262fcc.md
@@ -18,67 +18,67 @@ Chain `.catch()` to the last `.then()`. Pass in a callback function with `err` a
 You should use the `fetch()` method to make a `GET` request to `https://cdn.freecodecamp.org/curriculum/news-author-page/authors.json`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)/)
 ```
 
 You should chain another `.then()` to the existing `.then()`.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(/)
 ```
 
 You should add a `data` parameter to your second `.then()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)/)
 ```
 
 Your second `.then()` method should use arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*/)
 ```
 
 Your second `.then()` method should have curly braces.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*/)
 ```
 
 Your second `.then()` method should log `data` to the console.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)/)
 ```
 
 Your second `.then()` should not have a semicolon.
 
 ```js
-assert.notMatch(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\);/)
+assert.notMatch(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\);/)
 ```
 
 You should chain the `.catch()` method to the second `.then()` you already have.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(/)
 ```
 
 You should add an `err` parameter to your `.catch()` method.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)/)
 ```
 
 Your `.catch()` method should have an arrow function syntax.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?/)
 ```
 
 Your `.catch()` method should use `console.error()` to log `err` to the console with the text `` `There was an error: ${err}` ``. Don't forget to use backticks.
 
 ```js
-assert.match(code, /fetch\(('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\)\s*;?/)
+assert.match(code, /fetch\(\s*('|"|`)https:\/\/cdn\.freecodecamp\.org\/curriculum\/news\-author\-page\/authors\.json\1\s*\)\s*\.then\(\s*(\(\s*res\s*\)|res)\s*=>\s*res\.json\(\s*\)\s*\)\s*\.then\(\s*(\(\s*data\s*\)|data)\s*=>\s*\{\s*\n?\s*?console\.log\(\s*data\s*\);?\n?\s*\}\s*\)\n?\s*\.catch\(\s*(\(\s*err\s*\)|err)\s*=>\s*\{?\n?(\s*)?console\.error\(\s*`There\swas\san\serror:\s?\$\{\s*err\s*\}`\s*\);?\n?(\s*)?\}?\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
index 247b7c405ff..3c1dd38d289 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5462576784453146ec2.md
@@ -48,7 +48,7 @@ assert.match(code, /let\s+authorDataArr/)
 You should set your `authorDataArr` variable to an empty array (`[]`).
 
 ```js
-assert.match(code, /let\s+authorDataArr\s*=\s*\[\];?/)
+assert.match(code, /let\s+authorDataArr\s*=\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
index b42eb99a278..46fecba12fa 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da5dd6cd6db44f58b7787.md
@@ -14,7 +14,7 @@ Inside your `displayAuthors` function, chain `.forEach()` to `authors`.
 You should chain `.forEach()` to `authors`.
 
 ```js
-assert.match(code, /authors\.forEach\(\)/)
+assert.match(code, /authors\.forEach\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
index 92237f353bf..c6355467d8d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da615af82bf454215a992.md
@@ -34,7 +34,7 @@ assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*/)
 Функція зворотного виклику повинна бути порожньою.
 
 ```js
-assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\)\s*=>\s*\{\s*\}\s*\);?/)
+assert.match(code, /authors\.forEach\(\s*\(\s*\{.*\}\s*\,\s*index\s*\)\s*=>\s*\{\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
index f85f336fcaf..e18fe541be7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da73b09e7f046c758e0ed.md
@@ -16,7 +16,7 @@ First, remove your `console.log()` statement. Then, assign `data` to the `author
 You should remove the console log showing the `data`.
 
 ```js
-assert.notMatch(code, /console\.log\(data\);/)
+assert.notMatch(code, /console\.log\(\s*data\s*\);/)
 ```
 
 You should assign `data` to the `authorDataArr` variable
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
index 53a64b03fef..39e2c170d99 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da791d0c34a472b8d15b6.md
@@ -22,19 +22,19 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should have a console log with the text `Author Data Array:`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1/)
 ```
 
 You should use comma to separate your `Author Data Array:` text and `authorDataArr`.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,/)
 ```
 
 `authorDataArr` should be the second argument of your console log statement.
 
 ```js
-assert.match(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.match(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
index 3c0c9f30ad3..a509b9dd160 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da7bfbc7f0f477438ad8a.md
@@ -22,7 +22,7 @@ assert.match(code, /authorDataArr\s*=\s*data;?/)
 You should remove the console log statement showing `authorDataArr`
 
 ```js
-assert.notMatch(code, /console\.log\(("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\);?/)
+assert.notMatch(code, /console\.log\(\s*("|'|`)Author\s+Data\s+Array:\s*\1\,\s*authorDataArr\s*\);?/)
 ```
 
 You should call your `displayAuthors` function.
@@ -34,19 +34,19 @@ assert.match(code, /displayAuthors\(/)
 You should call your `displayAuthors` function and pass in an argument of `authorDataArr.slice()`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first parameter of your `slice()` method should be `startingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second parameter of your `slice()` method should be `endingIndex`.
 
 ```js
-assert.match(code, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\);?/)
+assert.match(code, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
index b189fa9b025..bfc751d3387 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da895fb7ec648a5bdf19c.md
@@ -34,13 +34,13 @@ assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*/)
 Your `fetchMoreAuthors` function should use arrow syntax.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*/)
 ```
 
 Функція `fetchMoreAuthors` повинна бути порожньою.
 
 ```js
-assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\)\s*=>\s*\{\s*\}/)
+assert.match(code, /const\s+fetchMoreAuthors\s*=\s*\(\s*\)\s*=>\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
index 8393520eae4..bf80b39588c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da97c987a514959ada414.md
@@ -24,21 +24,21 @@ You should call your `displayAuthors` function and pass in an argument of `autho
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(/)
 ```
 
 The first argument of your `slice()` method should be `startingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex/)
 ```
 
 The second argument of your `slice()` method should be `endingIndex`.
 
 ```js
 const afterAdd = code.split("endingIndex += 8;")[1];
-assert.match(afterAdd, /displayAuthors\(authorDataArr\.slice\(startingIndex\,\s*endingIndex\)\)/)
+assert.match(afterAdd, /displayAuthors\(\s*authorDataArr\.slice\(\s*startingIndex\,\s*endingIndex\s*\)\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
index 9ebf6260535..c9927ef5296 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9aceb788e49a73ebcc9.md
@@ -24,13 +24,13 @@ assert.match(code, /loadMoreBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
 Your event listener should take `fetchMoreAuthors` as the function to run.
 
 ```js
-assert.match(code, /loadMoreBtn\.addEventListener\(('|"|`)click\1,\s*fetchMoreAuthors\);?/)
+assert.match(code, /loadMoreBtn\.addEventListener\(\s*('|"|`)click\1,\s*fetchMoreAuthors\s*\);?/)
 ```
 
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
index 16658b7a62e..9eed2319101 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641da9ea9b847a49fe6ee9b6.md
@@ -24,13 +24,13 @@ assert.match(code, /if\s*\(/)
 Your `if` statement should take in `authorDataArr.length <= endingIndex` as its condition.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*/)
 ```
 
 Your `if` statement should be empty.
 
 ```js
-assert.match(code, /if\s*\(authorDataArr\.length\s*<=\s*endingIndex\)\s*\{\s*\}/)
+assert.match(code, /if\s*\(\s*authorDataArr\.length\s*<=\s*endingIndex\s*\)\s*\{\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
index f32cd2e909c..4331fec4874 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daabed8d0584b1150c953.md
@@ -28,22 +28,21 @@ assert.match(code, /<p\s*class=("|')bio\1>/);
 You should check if the length of the `bio` text is greater than `50`.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50/)
+assert.match(code, /<p\s*class=("|')bio\1>\s*\$\{\s*bio\.length\s*>\s*50/)
 ```
 
 If the `bio` text is greater than `50` characters, you should extract the first 50 characters with `slice()` and replace the rest with `...`. Don't forget that indexes are zero-based.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:/);
 ```
 
 If the `bio` text is less than 50 characters, use the `bio` text directly.
 
 ```js
-assert.match(code, /<p\s*class=("|')bio\1>\$\{\s*bio\.length\s*>\s*50\s*\?\s*bio\.slice\(\s*0\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2\s*\:\s*bio\s*\}<\/p>/)
+assert.match(code, /<p\s*class\s*=\s*("|')bio\1\s*>\s*\$\{\s*bio\.length\s*>\s*50\s*\?\s*(?:bio\.slice\(\s*0\s*\,\s*50\s*\)\s*\+\s*("|')\.\.\.\2|`\$\{\s*bio\.slice\(\s*0\s*,\s*50\s*\)\s*\}\.\.\.`)\s*:\s*bio\s*\}\s*<\/p>/);
 ```
 
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
index 39ed5504b83..853f69e8b24 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-fetch-and-promises-by-building-an-fcc-authors-page/641daae5e18eae4b562633e4.md
@@ -16,7 +16,7 @@ Inside the `.catch()`, remove the `console.error()` and set the `innerHTML` of t
 You should remove your `console.error` and its text.
 
 ```js
-assert.notMatch(code, /console\.error\(`There\s+was\s+an\s+error:\s+\$\{err\}`\);/)
+assert.notMatch(code, /console\.error\(\s*`There\s+was\s+an\s+error:\s+\$\{err\}`\s*\);/)
 ```
 
 You should access the `innerHTML` of `authorContainer` and set it to a `p` element. Don't forget to surround the `p` element with a template literal.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
index c9aae84484f..aa7b15e114b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/5ddb965c65d27e1512d44d9a.md
@@ -96,19 +96,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
index c3cd948bffd..3ca58065485 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b606f09a14cc1781aea1fb.md
@@ -120,19 +120,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
index 67799916d3a..d3aab2dcebe 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6075a62883218d282504c.md
@@ -111,19 +111,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
index 4d76eef9f87..11b890a872a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b607af6fcdb119aae9b16a.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
index 810a5e587a7..d4387ead2d1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60821c855d01b1eda3c0b.md
@@ -7,8 +7,9 @@ dashedName: step-5
 
 # --description--
 
-Тепер створіть `fieldset` з `id` зі значенням `lunch` та відповідні елементи `legend` й `div`.
+Next, create a `fieldset` element with the `id` set to `lunch`.
 
+Within that element, create a `legend` element with the text `Lunch`, and an empty `div` with the `class` set to `input-container`.
 # --hints--
 
 Ви повинні створити другий елемент `fieldset` у `form`.
@@ -138,19 +139,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
index bc9ca83891c..f00379636eb 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6088bb56e2d1cac364043.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
index 0862d2c5cfd..e4ba69c7511 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b608ebf40c871d960fc004.md
@@ -188,19 +188,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
index 6bc8fc1c257..ee0f3658738 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60a140bf5a321d50a7315.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
index 88a8f2de043..21745c0559e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60aaaa65f8922bfce6b7e.md
@@ -190,19 +190,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
index 95478a83a8e..7e4bfd302a9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60af1a0b9f7238a9dd294.md
@@ -196,19 +196,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
index 8e6866c11ba..22df099022a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60c09c5039f25a3b2dda9.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
index 72036354fa4..7cb9c28c877 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60ca38c897f2721b27959.md
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
index 08a64acd08c..97f9642d55f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60cfaca25bb27edd40f62.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
index 98938501774..1de313aad9f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b60d3c5048302906962231.md
@@ -29,13 +29,13 @@ const mainTitleElement = document.getElementById('title');
 assert.isDefined(calorieCounter);
 ```
 
-Ви повинні використати `document.getElementById()`, щоб отримати елемент `#calorie-counter`.
+You should have `document.getElementById('calorie-counter')` in your code.
 
 ```js
 assert.match(code, /document\.getElementById\(\s*('|")calorie-counter\1\s*\)/g);
 ```
 
-Ви повинні зберегти елемент `#calorie-counter` у змінній під назвою `calorieCounter`.
+You should assign `document.getElementById('calorie-counter')` to your `calorieCounter` variable.
 
 ```js
 assert.equal(calorieCounter, document.getElementById('calorie-counter'));
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
index e2c8be5127b..cc2b4057f7a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b613f367584d2a5d041b7d.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
index 50893cc442a..e1719d59362 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61490e633a22b4593e62f.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
index fcb2b31732a..875a6321dbc 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b614e6a1f7fe2cef6312dc.md
@@ -7,6 +7,13 @@ dashedName: step-17
 
 # --description--
 
+In programming, it is standard practice to prefix a variable with `is` or `has` to indicate that the variable is a boolean.
+
+```js
+let isRunning = true;
+let hasCompleted = false;
+```
+
 Declare an `isError` variable and set it to `false`, but use `let` so you can reassign it later.
 
 # --hints--
@@ -148,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
index 7782b2ff29d..f5ca736099f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b6152e6aff882db819fc1e.md
@@ -28,7 +28,7 @@ assert.isFunction(cleanInputString);
 Your `cleanInputString` function should take a `str` parameter.
 
 ```js
-assert.match(cleanInputString?.toString(), /\(str\)/);
+assert.match(cleanInputString?.toString(), /\(\s*str\s*\)/);
 ```
 
 `cleanInputString` має бути порожньою функцією.
@@ -156,19 +156,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
index 3b5291fec0c..c1137133fc0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63b61584def8fa2ebcc259e0.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
index d54abf2f47e..6afc1bf0172 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf43be3f969d24d4ed233c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
index f8872477b0f..ade82db60af 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf446945d34d25e6db6e4f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
index 269e1e2898d..6e3f8e9adfb 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf45ce0dc8d4270760c6d0.md
@@ -7,24 +7,26 @@ dashedName: step-22
 
 # --description--
 
-Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
-
 You will need to check if the array `["+", "-", " "]` does not include the current character. You can use a combination of the <dfn>includes()</dfn> method and the <dfn>!</dfn> operator to do this.
 
 The `.includes()` method returns `true` if the array contains the character, and `false` if not. The logical NOT operator (`!`) will return the opposite of the value of the `.includes()` method.
 
-Ось приклад:
+Here is an example checking if the current character is not in the vowels array. If it is not, that current character is pushed into the `consonantArray`:
 
 ```js
-const numbersArray = [1, 2, 3, 4, 5]
-const number = 6
+const inputString = "Hello World";
+const charArray = inputString.split('');
+const consonantArray = [];
 
-if (!numbersArray.includes(number)) {
-  console.log("The number is not in the array.")
+for (let i = 0; i < charArray.length; i++) {
+  if (!['a', 'e', 'i', 'o', 'u'].includes(charArray[i])) {
+    consonantArray.push(charArray[i]);
+  }
 }
-
 ```
 
+Within your loop, you need to check if the character in `strArray` at index `i` is not a `+`, `-`, or a space. If it is not, `push` it to the `cleanStrArray`.
+
 # --hints--
 
 Your `for` loop should have an `if` statement.
@@ -37,19 +39,19 @@ Your `for` loop should use `!["+", "-", " "].includes()`.
 
 ```js
 // the loop protection injects code so we have to look at the raw code directly
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(/);
 ```
 
-Your `for` loop should see if `strArray[i]` is found in `["+", "-", " "]`.
+Your `for` loop should see if `!["+", "-", " "].includes(strArray[i])`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?/);
 ```
 
 Your `for` loop should `push` `strArray[i]` to `cleanStrArray`.
 
 ```js
-assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(!\[("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\.includes\(\s*strArray\[i\]\s*\)\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\[i\]\s*\)\s*;?\s*(\s*\})?/);
+assert.match(code, /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*strArray\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*if\s*\(\s*!\s*\[\s*("|')\+\2\s*,\s*("|')-\3\s*,\s*("|')\s\4\s*\]\s*\.includes\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*\)(\s*\{)?\s*cleanStrArray\.push\(\s*strArray\s*\[\s*i\s*\]\s*\)\s*;?\s*(\s*\})?/);
 ```
 
 # --seed--
@@ -171,19 +173,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
index c4e0e4e85fc..ef32bfaa0da 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf461011fca327d3b60fa8.md
@@ -168,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
index ef1b99d3586..63f5940cec0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf47fd40599f29827f484d.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
index 1a43267df7d..676f2e7babc 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf492b6dfb292a79f0e675.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
index 4c4c5410e4d..5ada4d802a2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4bfe9de3852be51c8f86.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
index 0f8439dfa5d..aefc1d0d4a2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf4d351e06432ce9bf3627.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
index bde82c1c764..8feda48fb5b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf511b85b6082e54dc1573.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
index c1bb88ebd04..c34198b6a62 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5230bccd1c2f5c13e1ce.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
index ae0ecbb11e4..e215f4740a9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf598a4c807930a13a1a27.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
index 10b9ad25d3d..2458989362b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a518d54f63181ab639a.md
@@ -136,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
index 042165f1feb..0e62f4cc900 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5a92fd148d3264d5322b.md
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
index f9ce554f276..004b0b267b7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5adfe2981b332eb007b6.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
index f9531ffb2a0..849912bf1a7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5bcfebff0734593fad19.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
index daccb3b3c9b..7c4ca416db8 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5c438f523a359769106c.md
@@ -6,8 +6,13 @@ dashedName: step-35
 ---
 
 # --description--
+Strings have a <dfn>.match()</dfn> method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
 
-Strings have a `.match()` method, which takes a regex argument. `.match()` will return an array of match results – containing either the first match, or all matches if the global flag is used.
+```js
+const str = 'example string';
+const regex = /example/;
+const result = str.match(regex); // Returns ['example']
+```
 
 Return the result of calling the `.match()` method on `str` and passing your `regex` variable as the argument. You'll use this match result later on.
 
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
index 8915b5dd2a3..fd80e177061 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63bf5cf03b50bf36cfbe94ea.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
index 1ce0f8ee75c..b79c4f3906e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1dfbd56c71e278800010c.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
index 520f0984f48..15f467b9c14 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e0af28078f2dfad9eb3e.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
index 41629862dc4..d1f4a18096a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e1965a898d302e0af4e3.md
@@ -26,13 +26,13 @@ Replace your concatenated string in the `querySelector` with a template literal
 You should use a template literal in your `querySelector` method.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`.*`\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`.*`\s*\)/);
 ```
 
 Your template literal should have the value `{targetId} .input-container`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`\$\{targetId\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`\$\{targetId\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
index fdb4157a15a..1bdacb29ccd 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e5b4b3c8a031def3bd65.md
@@ -20,13 +20,13 @@ assert.notMatch(addEntry.toString(), /targetId\s*=/);
 You should replace the `targetId` reference in your template literal with `entryDropdown.value`.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#?\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 You should add `#` at the beginning of your template literal.
 
 ```js
-assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
+assert.match(code, /const\s+targetInputContainer\s*=\s*document\.querySelector\(\s*`#\$\{entryDropdown\.value\}\s\.input-container`\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
index 355a3557afd..378d35e5393 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c1e704ee12703347625900.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
index 9ecb545a9af..562676fa68d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2164c0df38a382062c4af.md
@@ -24,13 +24,13 @@ assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.query
 You should access the `length` property of your `querySelectorAll()`.
 
 ```js
-assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 Your `entryNumber` variable should be the `length` of the `querySelectorAll`.
 
 ```js
-assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\)\.length/)
+assert.match(addEntry.toString(), /entryNumber\s*=\s*targetInputContainer\.querySelectorAll\(\s*'\s*input\s*\[\s*type\s*=\s*"text"\s*]\s*'\s*\)\.length/)
 ```
 
 # --seed--
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
index afd7691135c..f28aa6d6113 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c216da562fbb3957b9cb2c.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
index b46b39b41dc..592e7a27b2a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2171c1e5b6e3aa51768d0.md
@@ -20,7 +20,7 @@ assert.match(code, /HTMLString\s*=\s*`\n\s*<label>.*<\/label>/);
 Your `label` element should have the text `Entry ${entryNumber} Name`.
 
 ```js
-assert.match(code, /HTMLString\s*=\s*`\n\s*<label>Entry\s\$\{entryNumber\}\sName<\/label>/);
+assert.match(code, /HTMLString\s*=\s*`\n\s*<label>\s*Entry\s\$\{entryNumber\}\sName\s*<\/label>/);
 ```
 
 # --seed--
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
index 03066ebef4d..61e8866489f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21774193de43bbc6a769f.md
@@ -142,19 +142,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
index 8d9f497b460..de9fd179515 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c217ccd939053ce4fa16d6.md
@@ -166,19 +166,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
index 289b06b9b84..5a022ab6194 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21839f56eaf3ef4e027c4.md
@@ -176,19 +176,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
index f8c9b3f4784..5d27598aaf0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2187f55eb0f400269568f.md
@@ -185,19 +185,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
index a54e7e758ac..7d7b4057fa0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c218c028c56a411b2a379a.md
@@ -172,19 +172,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
index 974cc6c9ec2..db06abdcb6a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c2194dce265f429300c8b1.md
@@ -138,19 +138,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
index 8a4c8e9e787..53e67aa9742 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21c17fa8fd6447ff0389d.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
index 0445d074cc9..3b262ac1701 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21cd2c34541469f5700a9.md
@@ -146,19 +146,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
index 1d589aed1ca..9e5536fa7e9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21d4f48267a47c2946788.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
index 94f32ee64d0..23ba0024c86 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c21dea919c8e4adb0df8e8.md
@@ -9,7 +9,25 @@ dashedName: step-50
 
 In the Role Playing Game project, you learned how to set a button's behavior by editing its `onclick` property. You can also edit an element's behavior by adding an event listener.
 
-Call the `.addEventListener()` method of the `addEntryButton`. It takes two arguments. The first is the event to listen to – you should pass the string `click`. The second is the callback function, or the function that runs when the event is triggered. Pass the `addEntry` function as the second argument. Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
+The following example uses the `addEventListener` method to add a click event to a button. When the button is clicked, the `printName` function is called.
+
+```html
+<button class="btn">Print name</button>
+```
+
+```js
+const button = document.querySelector('.btn');
+function printName() {
+  console.log("Jessica");
+}
+button.addEventListener('click', printName);
+```
+
+The `addEventListener` method takes two arguments. The first is the event to listen to. (Ex. `'click'`) The second is the callback function, or the function that runs when the event is triggered.
+
+Call the `.addEventListener()` method on the `addEntryButton`. Pass in the string `click` for the first argument and the `addEntry` function for the second argument.
+
+Note that you should not *call* `addEntry`, but pass the variable (or <dfn>function reference</dfn>) directly.
 
 # --hints--
 
@@ -150,19 +168,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
index 6b051c090aa..abb269dea07 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ab51214c8c1f1b9a49f7.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
index fb22a4ec57a..e43299333fb 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8ad0cd8f1e5201c4ef2e4.md
@@ -7,34 +7,26 @@ dashedName: step-56
 
 # --description--
 
-The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is an array-like which contains the elements that match the query selector.
+The `list` parameter is going to be the result of a query selector, which will return a `NodeList`. A `NodeList` is a list of elements like an array. It contains the elements that match the query selector. You will need to loop through these elements in the list.
 
-You'll need to loop through these elements, so start by creating a `for` loop. Your iterator `i` should start at `0`, continue while it is less than the length of the list, and increment by `1` each iteration.
+In previous steps, you learned how to loop through an array using a `for` loop. You can also use a <dfn>for...of</dfn> loop to loop through an array and a `NodeList`.
+
+A `for...of` loop is used to iterate over elements in an iterable object like an array. The variable declared in the loop represents the current element being iterated over.
+
+```js
+for (const element of elementArray) {
+  console.log(element);
+}
+```
+
+Create a `for...of` loop that loops through the list. For the loop's variable name, use `const` to declare a variable called `item`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should have a `for` loop.
+You should have a `for...of` loop that loops through the `list` parameter. Use `item` for the loop's variable name.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(/g);
-```
-
-Цикл `for` має ініціалізувати змінну під назвою `i` значенням `0`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;/g);
-```
-
-Your `for` loop should have a condition that checks if `i` is less than the length of `list`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;/g);
-```
-
-Your `for` loop should increment `i` by `1` each time it runs. Use the increment operator for this.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /for\s*\(\s*(let|var)\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)/g);
+assert.match(code, /for\s*\(\s*const\s+item\s+of\s+list\s*\)\s*\{/);
 ```
 
 # --seed--
@@ -156,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
index 4edcdf23bfc..4e3408eda27 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8b0187cceff21c8389543.md
@@ -9,40 +9,20 @@ dashedName: step-57
 
 The `NodeList` values you will pass to `list` will consist of `input` elements. So you will want to look at the `value` attribute of each element.
 
-Assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
+Assign `item.value` to a `const` variable called `currVal`.
 
 # --hints--
 
-You should have a `currVal` variable.
+You should use `const` to declare a new variable called `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=/);
+assert.match(code, /const\s+currVal\s*=/);
 ```
 
-You should access the element in `list` at index `i` using bracket notation.
+You should assign `item.value` to `currVal`.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]/);
-```
-
-You should access the `value` attribute of the element in `list` at index `i`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /list\[i\]\.value/);
-```
-
-You should assign the `value` of the element in `list` at index `i` to a variable called `currVal`.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*list\[i\]\.value/);
-```
-
-Your `currVal` assignment should be in your `for` loop.
-
-```js
-// another hack, because the loop protection injects stuff
-const getCaloriesString = code.split("function getCaloriesFromInputs")[1];
-assert.match(getCaloriesString, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*list\.length\s*;\s*i\s*\+\+\s*\)\s*\{\s*(const|let)\s+currVal\s*=\s*list\[i\]\.value/g);
+assert.match(code, /const\s+currVal\s*=\s*item\.value/);
 ```
 
 # --seed--
@@ -164,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,15 +224,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
+  --fcc-editable-region--
+  for (const item of list) {
 
   }
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
index 68c9b1cf8d3..18e4f181520 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8be904ffff922f3c6f8d0.md
@@ -9,26 +9,26 @@ dashedName: step-58
 
 Remember that you wrote a function earlier to clean the user's input? You'll need to use that function here.
 
-Update your `currVal` declaration to be the result of calling `cleanInputString` with `list[i].value`.
+Update your `currVal` declaration to be the result of calling `cleanInputString` with `item.value`.
 
 # --hints--
 
-Your `getCaloriesFromInputs` function should call your `cleanInputString` function.
+You should call the `cleanInputString` function inside the `getCaloriesFromInputs` function.
 
 ```js
 assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(/);
 ```
 
-You should pass `list[i].value` as the argument for `cleanInputString`.
+You should pass `item.value` as the argument for `cleanInputString` function.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(getCaloriesFromInputs.toString(), /cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 You should assign the result of your `cleanInputString` call to your `currVal` variable.
 
 ```js
-assert.match(getCaloriesFromInputs.toString(), /currVal\s*=\s*cleanInputString\(\s*list\[i\]\.value\)/);
+assert.match(code, /const\s+currVal\s*=\s*cleanInputString\(\s*item\.value\s*\)/);
 ```
 
 
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -238,15 +231,15 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = list[i].value;
+  for (const item of list) {
+    --fcc-editable-region--
+    const currVal = item.value;
+    --fcc-editable-region--
   }
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
index 1888b5ce070..0c0682ecdfd 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c00bfb671b23f9de4159.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -239,8 +232,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
 
   }
 }
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
index 29b896ed4f5..ca336410c45 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c8c15fd337ad24b9b68049.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -251,8 +244,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
index f8e2a0acdc0..2b9c2c408c2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bc53735149084390e5d0.md
@@ -23,13 +23,13 @@ You should use a template literal to pass the `Invalid Input:` message to the `a
 
 ```js
 // because it transforms template literals...
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: /);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: /);
 ```
 
-You should use template literal syntax to display the first value in the `invalidInputMatch` array after the `Invalid Input:` text.
+You should display the first element of the `invalidInputMatch` array after the `Invalid Input:` text by using a template literal.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\)/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\)/);
 ```
 
 # --seed--
@@ -151,19 +151,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
index f6301e57c27..be683139c87 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bcc26219e7090da0f549.md
@@ -7,6 +7,8 @@ dashedName: step-62
 
 # --description--
 
+In programming, `null` is meant to represent the absence of a value. In this case, if the user enters an invalid input, you want to alert them and then return `null` to indicate that the function has failed.
+
 Still within your `if` block, set `isError` to `true` and return `null`.
 
 # --hints--
@@ -14,13 +16,13 @@ Still within your `if` block, set `isError` to `true` and return `null`.
 After your `alert`, you should set `isError` to `true`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true/);
 ```
 
 After you modify `isError`, you should `return` the value `null`.
 
 ```js
-assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(`Invalid Input: \${invalidInputMatch\[0\]}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
+assert.match(code.split(/function\s+getCaloriesFromInputs/)[1], /alert\(\s*`Invalid Input: \${invalidInputMatch\s*\[\s*0\s*\]\s*}`\s*\);\s*isError\s*=\s*true;?\s*return\s+null;?\s*\}/);
 ```
 
 # --seed--
@@ -142,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -233,8 +228,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
index bb0a2ce3e18..0c6334fb76f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bce376ca4f09c15a3768.md
@@ -17,6 +17,7 @@ The `Number` constructor is a function that converts a value to a number. If the
 
 ```js
 Number('10'); // returns the number 10
+Number('abc'); // returns NaN
 ```
 
 # --hints--
@@ -164,19 +165,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +249,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
index 8cd559d7404..de841fccd6c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bdd916e0c10af01ed8d7.md
@@ -17,12 +17,6 @@ You should `return` the `calories` value.
 assert.match(getCaloriesFromInputs.toString(), /return\s+calories/);
 ```
 
-Your new `return` statement should come after your `for` loop.
-
-```js
-assert.match(getCaloriesFromInputs.toString(), /calories\s*\+=\sNumber\(currVal\);\n\s*}\n\s*return\s+calories/)
-```
-
 # --seed--
 
 ## --seed-contents--
@@ -142,19 +136,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -229,12 +216,11 @@ function addEntry() {
   targetInputContainer.insertAdjacentHTML('beforeend', HTMLString);
 }
 
---fcc-editable-region--
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -244,9 +230,10 @@ function getCaloriesFromInputs(list) {
     }
     calories += Number(currVal);
   }
+  --fcc-editable-region--
 
+  --fcc-editable-region--
 }
---fcc-editable-region--
 
 addEntryButton.addEventListener("click", addEntry);
 ```
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
index 741f7103a4d..b6db1faf9cd 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9be334f4a050c0b94bc93.md
@@ -26,7 +26,7 @@ assert.isFunction(calculateCalories);
 Your `calculateCalories` function should take an `e` argument.
 
 ```js
-assert.match(calculateCalories?.toString(), /\(e\)/);
+assert.match(calculateCalories?.toString(), /\(\s*e\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -242,8 +235,8 @@ function addEntry() {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
index a987a3ead6f..d5b1e5a397a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bef7fec05c0d38853828.md
@@ -16,7 +16,7 @@ Add a line to your `calculateCalories` function that calls the `preventDefault()
 Your `calculateCalories` function should call `e.preventDefault()`.
 
 ```js
-assert.match(calculateCalories.toString(), /e\.preventDefault\(\)/);
+assert.match(calculateCalories.toString(), /e\.preventDefault\(\s*\)/);
 ```
 
 Your `calculateCalories` function should reset the global error flag to `false`.
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -240,8 +233,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
index ddbebce4ddd..8647736218a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9bf80558d780e848b2987.md
@@ -22,13 +22,13 @@ assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#breakfast input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `odocument.querySelectorAll()` call to `breakfastNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(('|")#breakfast input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /breakfastNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#breakfast input\[\s*type=number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -249,8 +242,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
index 204fe0b1dd7..e1394bdbf2c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c09a7daa4f0ff92c4023.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#lunch input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `lunchNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(('|")#lunch input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /lunchNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#lunch input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -248,8 +241,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
index df761d0f1f8..05f8bdaece8 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c0d0857f0a10a57af936.md
@@ -20,13 +20,13 @@ assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#dinner input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `dinnerNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(('|")#dinner input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /dinnerNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#dinner input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Оголосіть змінну `snacksNumberInputs`.
@@ -38,13 +38,13 @@ assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#snacks input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `snacksNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(('|")#snacks input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /snacksNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#snacks input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 Оголосіть змінну `exerciseNumberInputs`.
@@ -56,13 +56,13 @@ assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=/);
 You should call `document.querySelectorAll()` with `#exercise input[type=number]`.
 
 ```js
-assert.match(calculateCalories.toString(), /document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 You should assign the result of your `document.querySelectorAll()` call to `exerciseNumberInputs`.
 
 ```js
-assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(('|")#exercise input\[type=number\]\1\)/);
+assert.match(calculateCalories.toString(), /exerciseNumberInputs\s*=\s*document\.querySelectorAll\(\s*('|")#exercise input\[\s*type\s*=\s*number\s*\]\s*\1\s*\)/);
 ```
 
 # --seed--
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -285,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
index 15d29f5c10b..97f8526411d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c11a0a090311dff55564.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -255,8 +248,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
index 0ee4fc1384e..7ef449d4bba 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c16dd75dd212dc12363c.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -254,8 +247,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
index 398f7f36067..aa96753e1a9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9c1ef134f3513e751c975.md
@@ -184,19 +184,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -291,8 +284,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
index 6d0731bebfd..8fde719594c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e3a83bb3e61a80eea564.md
@@ -152,19 +152,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -262,8 +255,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
index 91bddccfd5d..fd70148d032 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e45519caf31b987fbb5f.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -260,8 +253,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
index 791027764b4..08d3955f9fa 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e4d2ff41811dd640504f.md
@@ -154,19 +154,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -270,8 +263,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
index 64a92e98448..1d1b8a80dcc 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e51b3a007a1eba1cd0f6.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -265,8 +258,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
index da300884cc1..f45ebd6f4cf 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e55b4b06c11fff555c64.md
@@ -162,19 +162,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +273,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
index 819e47f5a2c..22818d3d9a2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e5eea8261d22856ead1c.md
@@ -7,7 +7,7 @@ dashedName: step-78
 
 # --description--
 
-You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element.
+You need to construct the HTML string that will be displayed in the `output` element. Start by assigning an empty template literal to the `innerHTML` property of the `output` element on a new line at the end of the function.
 
 # --hints--
 
@@ -144,19 +144,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -263,8 +256,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
index ddebd6d3729..f06adcd6651 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e63bb1e32d23b6adbe44.md
@@ -7,9 +7,16 @@ dashedName: step-79
 
 # --description--
 
-Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable, but lowercased.
+When you need to lower case a string, you can use the <dfn>toLowerCase()</dfn> method. This method returns the calling string value converted to lower case.
 
-Strings have a `.toLowerCase()` method that can help you with this. Do not give your `span` any text yet.
+```js
+const firstName = 'JESSICA';
+console.log(firstName.toLowerCase()); // Output: jessica
+```
+
+Your `output.innerHTML` string will need a `span` element. Create that, and give it a `class` attribute set to the `surplusOrDeficit` variable. Your `surplusOrDeficit` variable should be converted to lower case using the `toLowerCase()` method.
+
+Do not give your `span` any text yet.
 
 # --hints--
 
@@ -160,19 +167,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -279,8 +279,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
index 17097da0ca3..893de075ec7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e6b7c0303524af2d0bc2.md
@@ -137,19 +137,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -258,8 +251,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
index 3ca2248ec3d..07c37a78826 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e769df38c92635c158ba.md
@@ -9,7 +9,14 @@ dashedName: step-81
 
 When the user has a calorie deficit, the `remainingCalories` value will be negative. You don't want to display a negative number in the result string.
 
-`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number. In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
+`Math.abs()` is a built-in JavaScript method that will return the absolute value of a number.
+
+```js
+const num = -5;
+Math.abs(num); // 5
+```
+
+In your `span` text, wrap your `remainingCalories` reference in `Math.abs()` to ensure that the value is positive.
 
 # --hints--
 
@@ -24,7 +31,7 @@ Your `span` should have the text `${Math.abs(remainingCalories)} Calorie ${surpl
 
 ```js
 const htmlString = code.split(/output\s*\.\s*innerHTML\s*=\s*/)[1].split(/`/)[1];
-assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(remainingCalories\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
+assert.match(htmlString, /<span\s+class\s*=\s*"\$\{surplusOrDeficit\s*\.toLowerCase\(\s*\)\}"\s*>\$\{Math\.abs\(\s*remainingCalories\s*\)\} Calorie \$\{surplusOrDeficit\}<\/span>/);
 ```
 
 # --seed--
@@ -146,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -267,8 +267,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
index cc19da58a75..e44c3c0af3c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e7d5b21eee2776ecc226.md
@@ -153,19 +153,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
index 4aa1700229d..65cdfa24c51 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e84c9fe8ca28c4101189.md
@@ -160,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -283,8 +276,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
index e9e938ee4da..9045fdd09c0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e8fe3a6f022a05a04675.md
@@ -158,19 +158,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -282,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
index 5c7fec0dd30..0828e2a6ea2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9e94e9df7d72aed1c24bd.md
@@ -9,6 +9,11 @@ dashedName: step-85
 
 Finally, you need to make the `#output` element visible so the user can see your text. Your `output` variable is an Element, which has a `classList` property. This property has a `.remove()` method, which accepts a string representing the class to remove from the element.
 
+```js
+const paragraphElement = document.getElementById('paragraph');
+paragraphElement.classList.remove('hide');
+```
+
 Use the `.remove()` method of the `output` variable's `classList` property to remove the `hide` class. Don't forget to place the word `hide` inside quotes.
 
 # --hints--
@@ -150,19 +155,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -277,8 +275,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
index bdbdf314618..a366f412ecb 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea23dbadbf2c2764e3f5.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
index bcf8926b091..8af7afe2ca4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ea9b16430f2d54522464.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
index 1755c337a01..4d15225abe0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb09bcfaa72e3da820a1.md
@@ -148,19 +148,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -273,8 +266,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
index e04df3290e4..8ebbda4a70b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9eb4a5d68f12f32d9b440.md
@@ -9,6 +9,22 @@ dashedName: step-89
 
 Remember that `document.querySelectorAll` returns a `NodeList`, which is array-like but is not an array. However, the `Array` object has a `.from()` method that accepts an array-like and returns an array. This is helpful when you want access to more robust array methods, which you will learn about in a future project.
 
+The following example takes a `NodeList` of `li` elements and converts it to an array of `li` elements:
+
+```html
+<ul>
+  <li>List 1</li>
+  <li>List 2</li>
+  <li>List 3</li>
+</ul>
+```
+
+```js
+const listItemsArray = Array.from(document.querySelectorAll('li'));
+
+console.log(listItemsArray); //Output: (3) [li, li, li]
+```
+
 Wrap your `inputContainers` query selector in `Array.from()`. Do this on the same line as your declaration.
 
 # --hints--
@@ -144,19 +160,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -269,8 +278,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
index 73b9ba9801f..a988fa20195 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ebb7b12bca3025b0a935.md
@@ -7,33 +7,25 @@ dashedName: step-90
 
 # --description--
 
-It is time for another loop. Use a `for` loop to iterate through the `inputContainers` array.
+It is time for another loop. Create a `for...of` loop with a variable called `container` to iterate through the `inputContainers` array.
 
-Inside the loop, set the `innerHTML` property of the element at the current index to an empty string. This will clear all of the contents of that input container.
+Inside the loop, set the `innerHTML` property of the `container` to an empty string. This will clear all of the contents of that input container.
 
 # --hints--
 
-Your `clearForm` function should have a `for` loop.
+Your `for...of` loop should iterate through the `inputContainers` array. The loop's variable name should be `container`.
 
 ```js
-// loop protect injects stuff, so let's look at the raw code again
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(/);
+assert.match(clearForm, /for\s*\(\s*const\s+container\s+of\s+inputContainers\s*\)/);
 ```
 
-Your `for` loop should iterate through the `inputContainers` array. Remember to use `i` as your iterator.
+Your `for...of` loop should set the `innerHTML` property of `container` to an empty string.
 
 ```js
 const clearForm = code.split("function clearForm()")[1];
-assert.match(clearForm, /for\s*\(\s*let\s+i\s*=\s*0\s*;\s*i\s*<\s*inputContainers\.length\s*;\s*i\s*\+\+\s*\)/);
-```
-
-Your `for` loop should set the `innerHTML` property of `inputContainers[i]` to an empty string.
-
-```js
-const clearForm = code.split("function clearForm()")[1];
-const forLoop = clearForm.split("for")[1];
-assert.match(forLoop, /inputContainers\[\s*i\s*\]\s*\.innerHTML\s*=\s*(`|'|")\1\s*/);
+const forOfLoop = clearForm.split("for")[1];
+assert.match(forOfLoop, /container\s*\.\s*innerHTML\s*=\s*(`|'|")\1\s*/);
 ```
 
 # --seed--
@@ -155,19 +147,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -280,8 +265,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
index 2c6c5ad6804..e0052359a60 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9ec044acedf312c4974ff.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
index a42b7bc4b58..42d73f9191e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f24afbc9cf324dcaa9a4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
index d4a46f4a493..7c1146b3aa8 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f28bda3e3f336e21b6b4.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -293,8 +286,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
index 9b997980774..2065e4eb78a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-form-validation-by-building-a-calorie-counter/63c9f2bff625af342023512c.md
@@ -150,19 +150,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -275,8 +268,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -292,8 +285,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
@@ -425,19 +418,12 @@ legend {
 }
 
 button {
-  outline: none;
   cursor: pointer;
   text-decoration: none;
   background-color: var(--light-yellow);
   border: 2px solid var(--dark-yellow);
 }
 
-.clear {
-  background-color: var(--light-pink);
-  color: var(--dark-red);
-  border-color: var(--dark-red);
-}
-
 button,
 input,
 select {
@@ -550,8 +536,8 @@ function calculateCalories(e) {
 function getCaloriesFromInputs(list) {
   let calories = 0;
 
-  for (let i = 0; i < list.length; i++) {
-    const currVal = cleanInputString(list[i].value);
+  for (const item of list) {
+    const currVal = cleanInputString(item.value);
     const invalidInputMatch = isInvalidInput(currVal);
 
     if (invalidInputMatch) {
@@ -567,8 +553,8 @@ function getCaloriesFromInputs(list) {
 function clearForm() {
   const inputContainers = Array.from(document.querySelectorAll('.input-container'));
 
-  for (let i = 0; i < inputContainers.length; i++) {
-    inputContainers[i].innerHTML = '';
+  for (const container of inputContainers) {
+    container.innerHTML = '';
   }
 
   budgetNumberInput.value = '';
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
index ce57bcf244b..b666dc40eaa 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/642ddfdea4200e313f80a4b6.md
@@ -16,13 +16,13 @@ In your `createLabel` function, declare a `label` variable and assign it a new `
 Оголосіть змінну `label` у функції `createLabel`.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*(?:const|let|var)\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*(?:const|let|var)\s+label/);
 ```
 
 Змінна `label` має бути оголошеною за допомогою `const`.
 
 ```js
-assert.match(code, /const\s+createLabel\s*=\s*\(?\s*name\s*\)?\s*=>\s*\{\s*const\s+label/);
+assert.match(code, /const\s+createLabel\s*=\s*(\(\s*name\s*\)|name)\s*=>\s*\{\s*const\s+label/);
 ```
 
 You should use the `.createElement()` method of the `document` object.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
index 2b1b806a0f8..53e356fba74 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64347464f78cd9209545f35c.md
@@ -22,7 +22,7 @@ assert.match(code, /letters\.forEach\(/);
 You should pass your `createLabel` function reference to the `.forEach()` method.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*createLabel\s*\)/);
+assert.match(code, /letters\.forEach\(\s*(?:\(\s*([\S]*)\s*\)|\s*([\S]*))\s*=>\s*createLabel\(\s*\1\2\s*\)\s*\)|letters\.forEach\(\s*createLabel\s*\)/);
 ```
 
 You should not pass a `createLabel` function call.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
index c9b4ba900ec..066ecf08fcd 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6434759f78ec812264ff8f34.md
@@ -7,7 +7,7 @@ dashedName: step-16
 
 # --description--
 
-In your callback, call `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
+In your callback, you will need to make two function calls. Start by calling `createLabel()` and pass `number` as the argument. You should see some numbers appear in your spreadsheet.
 
 Then call the `.forEach()` method on your `letters` array. Pass an empty callback function which takes a `letter` parameter.
 
@@ -46,7 +46,13 @@ assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{/)
 Функція зворотного виклику має бути порожньою.
 
 ```js
-assert.match(code, /letters\.forEach\(\s*\(?\s*letter\s*\)?\s*=>\s*\{\s*\}/)
+assert.match(code, /letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}/)
+```
+
+Your `letters.forEach()` callback function should be nested inside the `range(1, 99).forEach(number => {}` callback function.
+
+```js
+assert.match(code, /range\s*\(\s*1\s*,\s*99\s*\)\s*.forEach\s*\(\s*(\(\s*number\s*\)|number)\s*=>\s*\{\s*[^}]*letters\.forEach\(\s*(\(\s*letter\s*\)|letter)\s*=>\s*\{\s*\}\s*\)\s*\}\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
index 98d149f2546..5771e3ca99a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643475e13dc727231acd0f72.md
@@ -9,8 +9,6 @@ dashedName: step-17
 
 Now in your nested `.forEach()` call, declare an `input` variable. Use the `.createElement()` method of the `document` object to create an `input` element. Встановіть атрибут `type` на `text` та атрибут `id` на `letter + number`.
 
-For accessibility, set the `aria-label` attribute to the same value as the `id` attribute.
-
 # --hints--
 
 Оголосіть змінну `input`.
@@ -67,18 +65,6 @@ assert.match(code, /input\.id/);
 assert.match(code, /input\.id\s*=\s*letter\s\+\snumber/)
 ```
 
-Отримайте доступ до властивості `ariaLabel` елемента `input`.
-
-```js
-assert.match(code, /input\.ariaLabel/);
-```
-
-Встановіть атрибут `aria-label` елемента `input` на `letter + number`.
-
-```js
-assert.match(code, /input\.ariaLabel\s*=\s*letter\s\+\snumber/)
-```
-
 # --seed--
 
 ## --seed-contents--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
index 911c3299683..4704cf0069e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498328cb52026123e2b91.md
@@ -1,8 +1,8 @@
 ---
 id: 643498328cb52026123e2b91
-title: Крок 18
+title: Step 19
 challengeType: 0
-dashedName: step-18
+dashedName: step-19
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
index 5e313c4e28b..7a64f75fcae 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643498755d54c6279ba09078.md
@@ -1,8 +1,8 @@
 ---
 id: 643498755d54c6279ba09078
-title: Крок 19
+title: Step 20
 challengeType: 0
-dashedName: step-19
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
index e35ce7a03b1..ee92978b16a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437124c4c03dd4c8fb35d56.md
@@ -1,8 +1,8 @@
 ---
 id: 6437124c4c03dd4c8fb35d56
-title: Крок 20
+title: Step 21
 challengeType: 0
-dashedName: step-20
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
index d3aa7ef91bf..63ae7b86205 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6437133052eaf04d7300e622.md
@@ -1,8 +1,8 @@
 ---
 id: 6437133052eaf04d7300e622
-title: Крок 21
+title: Step 22
 challengeType: 0
-dashedName: step-21
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
index a823892e2d1..dc7e77924ea 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/643715013330824ecaa70442.md
@@ -1,8 +1,8 @@
 ---
 id: 643715013330824ecaa70442
-title: Крок 22
+title: Step 23
 challengeType: 0
-dashedName: step-22
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
index ffaf6d768dc..3bcfe430c34 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d1e5af8c0148fbef96d.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d1e5af8c0148fbef96d
-title: Крок 23
+title: Step 24
 challengeType: 0
-dashedName: step-23
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
index 0ef54d5b870..07d250b0f8c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496d80bc174a158c973080.md
@@ -1,8 +1,8 @@
 ---
 id: 64496d80bc174a158c973080
-title: Крок 24
+title: Step 25
 challengeType: 0
-dashedName: step-24
+dashedName: step-25
 ---
 
 # --description--
@@ -50,19 +50,19 @@ assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*n
 The first element of the array passed to `average()` should be the element at the `middle` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]/);
 ```
 
 The first element of the array passed to `average()` should be the element at the `middle + 1` index of your `sorted` array.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\)/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)/);
 ```
 
 If the ternary is false, you should return the value of `sorted` at the `middle` index. Use `Math.ceil()` to round the `middle` value up.
 
 ```js
-assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\[\s*middle\s*\]\s*,\s*sorted\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\[\s*Math\.ceil\(\s*middle\s*\)\s*\];?/);
+assert.match(code, /const\s+median\s*=\s*nums\s*=>\s*\{\s*const\s+sorted\s*=\s*nums\.slice\(\s*\)\.sort\(\s*\(\s*a\s*,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\)\s*\s*;?\s*const\s+length\s*=\s*sorted\.length;?\s*const\s+middle\s*=\s*length\s*\/\s*2\s*-\s*1\s*;?\s*return\s+isEven\(\s*length\s*\)\s*\?\s*average\(\s*\[\s*sorted\s*\[\s*middle\s*\]\s*,\s*sorted\s*\[\s*middle\s*\+\s*1\s*\]\s*\]\s*\)\s*:\s*sorted\s*\[\s*Math\.ceil\(\s*middle\s*\)\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
index 8a43fd4458d..3c27dff1449 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496df724dd3716a71fe971.md
@@ -1,8 +1,8 @@
 ---
 id: 64496df724dd3716a71fe971
-title: Крок 25
+title: Step 26
 challengeType: 0
-dashedName: step-25
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
index 7f46d874cce..b03df0a9ad9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64496e9c6d7a2e189948e441.md
@@ -1,8 +1,8 @@
 ---
 id: 64496e9c6d7a2e189948e441
-title: Крок 26
+title: Step 27
 challengeType: 0
-dashedName: step-26
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
index ff4e7ea56bb..5c293ca1285 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449749d20436c1f1dfadcf2.md
@@ -1,8 +1,8 @@
 ---
 id: 6449749d20436c1f1dfadcf2
-title: Крок 27
+title: Step 28
 challengeType: 0
-dashedName: step-27
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
index 145ec454ece..f0b03bea048 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449755666005520330cec5b.md
@@ -1,8 +1,8 @@
 ---
 id: 6449755666005520330cec5b
-title: Крок 28
+title: Step 29
 challengeType: 0
-dashedName: step-28
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
index 9deb777bee0..c3d5a1ddce3 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497da4062602213ecf32e7.md
@@ -1,8 +1,8 @@
 ---
 id: 64497da4062602213ecf32e7
-title: Крок 29
+title: Step 30
 challengeType: 0
-dashedName: step-29
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
index 13767ef4ec8..e018fb06bbf 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497de936a2f322327e5c58.md
@@ -1,8 +1,8 @@
 ---
 id: 64497de936a2f322327e5c58
-title: Крок 30
+title: Step 31
 challengeType: 0
-dashedName: step-30
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
index 66d281a2e4f..9a418bcf2fb 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e0e5e5a2c2329785af4.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e0e5e5a2c2329785af4
-title: Крок 31
+title: Step 32
 challengeType: 0
-dashedName: step-31
+dashedName: step-32
 ---
 
 # --description--
@@ -16,7 +16,7 @@ Use the `&&` operator to add a second condition to your `if` statement that also
 You should use the `&&` operator to add a second condition to your `if` statement that also checks if the first character of `value` is `=`. You may use `[0]`, `.startsWith()`, or `.charAt(0)`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
index 2aa4c80e410..6abbdbb66cb 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64497e764135bd24b7960dd3.md
@@ -1,8 +1,8 @@
 ---
 id: 64497e764135bd24b7960dd3
-title: Крок 32
+title: Step 33
 challengeType: 0
-dashedName: step-32
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
index 7b5533ce962..06d647303ae 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449842c6f6c84261075e4c9.md
@@ -1,8 +1,8 @@
 ---
 id: 6449842c6f6c84261075e4c9
-title: Крок 33
+title: Step 34
 challengeType: 0
-dashedName: step-33
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
index 0a5d18e832d..f331b2e13dc 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498473a17adc26ef0ecc2d.md
@@ -1,8 +1,8 @@
 ---
 id: 64498473a17adc26ef0ecc2d
-title: Крок 34
+title: Step 35
 challengeType: 0
-dashedName: step-34
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
index 4082a404ddc..bd26f310db1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449849b78f43527be1e8a98.md
@@ -1,8 +1,8 @@
 ---
 id: 6449849b78f43527be1e8a98
-title: Крок 35
+title: Step 36
 challengeType: 0
-dashedName: step-35
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
index edd09bbb218..379d979b83e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498542cab69128ab24e4de.md
@@ -1,8 +1,8 @@
 ---
 id: 64498542cab69128ab24e4de
-title: Крок 36
+title: Step 37
 challengeType: 0
-dashedName: step-36
+dashedName: step-37
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
index c8cd1036557..db2048f5154 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449860d84c9e22cbd7b497c.md
@@ -1,8 +1,8 @@
 ---
 id: 6449860d84c9e22cbd7b497c
-title: Крок 37
+title: Step 38
 challengeType: 0
-dashedName: step-37
+dashedName: step-38
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
index dab99740256..1d217df30cf 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449863f592af72d9be0959e.md
@@ -1,8 +1,8 @@
 ---
 id: 6449863f592af72d9be0959e
-title: Крок 38
+title: Step 39
 challengeType: 0
-dashedName: step-38
+dashedName: step-39
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
index 307eac03f1b..97250208fe7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449874d5191562eb3313b3f.md
@@ -1,8 +1,8 @@
 ---
 id: 6449874d5191562eb3313b3f
-title: Крок 39
+title: Step 40
 challengeType: 0
-dashedName: step-39
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
index b7fba00d55d..d74ce3bfd48 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6449876e7aae0d2f8257a497.md
@@ -1,8 +1,8 @@
 ---
 id: 6449876e7aae0d2f8257a497
-title: Крок 40
+title: Step 41
 challengeType: 0
-dashedName: step-40
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
index 61eeacb6dfd..d40aabe5b0c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/64498b085028fc30a58bb6a7.md
@@ -1,8 +1,8 @@
 ---
 id: 64498b085028fc30a58bb6a7
-title: Крок 41
+title: Step 42
 challengeType: 0
-dashedName: step-41
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
index b3773b59142..1ff93bed7c7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0889c6ff4baa46ac1c50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0889c6ff4baa46ac1c50
-title: Крок 42
+title: Step 43
 challengeType: 0
-dashedName: step-42
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
index 2377f63ec31..0caac554013 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d09a07241aaab1e777080.md
@@ -1,8 +1,8 @@
 ---
 id: 646d09a07241aaab1e777080
-title: Крок 43
+title: Step 44
 challengeType: 0
-dashedName: step-43
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
index 947e1495c03..4ebe4fde751 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0a022da7bcabf3e3aca3.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0a022da7bcabf3e3aca3
-title: Крок 44
+title: Step 45
 challengeType: 0
-dashedName: step-44
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
index 3a58ca5cbfe..e0e3a16612d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0d20108440acc95a6b32.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0d20108440acc95a6b32
-title: Крок 45
+title: Step 46
 challengeType: 0
-dashedName: step-45
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
index fa395feea75..e8720b88a53 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0db5175974ad8633b71c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0db5175974ad8633b71c
-title: Крок 46
+title: Step 47
 challengeType: 0
-dashedName: step-46
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
index 80df0e33d23..9f7371214f9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d0e4636e14eae2bb3b992.md
@@ -1,8 +1,8 @@
 ---
 id: 646d0e4636e14eae2bb3b992
-title: Крок 47
+title: Step 48
 challengeType: 0
-dashedName: step-47
+dashedName: step-48
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
index 32605e92e28..115fcb7b72b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1980018efaaec2b1c28b.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1980018efaaec2b1c28b
-title: Крок 48
+title: Step 49
 challengeType: 0
-dashedName: step-48
+dashedName: step-49
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
index 2c119f225cb..7f8eb0a90b8 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d19fc4705e4af65c3e688.md
@@ -1,8 +1,8 @@
 ---
 id: 646d19fc4705e4af65c3e688
-title: Крок 49
+title: Step 50
 challengeType: 0
-dashedName: step-49
+dashedName: step-50
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
index 55c6ceb17cf..504342b741b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1b96dd7ea4b0061458bc.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1b96dd7ea4b0061458bc
-title: Крок 50
+title: Step 51
 challengeType: 0
-dashedName: step-50
+dashedName: step-51
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
index ac0abd1af9f..2d6106b0f02 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1cadf0d96ab0b7e12da4.md
@@ -1,13 +1,13 @@
 ---
 id: 646d1cadf0d96ab0b7e12da4
-title: Крок 51
+title: Step 52
 challengeType: 0
-dashedName: step-51
+dashedName: step-52
 ---
 
 # --description--
 
-Because `elemValue` returns a function, your `addChars` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
+Because `elemValue` returns a function, your `addCharacters` function ultimately returns an array of function references. You want the `.map()` method to run the inner function of your `elemValue` function, which means you need to call `elemValue` instead of reference it. Pass `num` as the argument to your `elemValue` function.
 
 <!-- TODO: Explain further? -->
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
index 1e527e64def..a9a7d21b24c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1d67f9261fb15a795588.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1d67f9261fb15a795588
-title: Крок 52
+title: Step 53
 challengeType: 0
-dashedName: step-52
+dashedName: step-53
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
index d2f612fed88..448478dbbcd 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d1e531042dfb24da1f032.md
@@ -1,8 +1,8 @@
 ---
 id: 646d1e531042dfb24da1f032
-title: Крок 53
+title: Step 54
 challengeType: 0
-dashedName: step-53
+dashedName: step-54
 ---
 
 # --description--
@@ -16,13 +16,13 @@ The callback function takes a few parameters. The first is the matched string. P
 Передайте стрілкову функцію як другий аргумент до методу `.replace()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(.*\)|[^\s()]+)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 Стрілкова функція має приймати параметр `match`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*(\(\s*match\s*\)|match)\s*=>\s*\{\s*\}\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
index 81744fe9bd4..4e0bdcafe1b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3141790b3cb337dd611a.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3141790b3cb337dd611a
-title: Крок 54
+title: Step 55
 challengeType: 0
-dashedName: step-54
+dashedName: step-55
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
index f7707c9a4f7..bea96bffa0e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d382c4d70ceb3dba1e830.md
@@ -1,8 +1,8 @@
 ---
 id: 646d382c4d70ceb3dba1e830
-title: Крок 55
+title: Step 56
 challengeType: 0
-dashedName: step-55
+dashedName: step-56
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
index 8b324881ce3..7a1435a9e93 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d386a685620b49db4be76.md
@@ -1,8 +1,8 @@
 ---
 id: 646d386a685620b49db4be76
-title: Крок 56
+title: Step 57
 challengeType: 0
-dashedName: step-56
+dashedName: step-57
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
index 31751c41100..a7b894a9692 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38c326f3c8b54023de38.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38c326f3c8b54023de38
-title: Крок 57
+title: Step 58
 challengeType: 0
-dashedName: step-57
+dashedName: step-58
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
index 418366d007b..0af42bfb322 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d38f906b94cb5fe6ce7de.md
@@ -1,8 +1,8 @@
 ---
 id: 646d38f906b94cb5fe6ce7de
-title: Крок 58
+title: Step 59
 challengeType: 0
-dashedName: step-58
+dashedName: step-59
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
index c8eb035f6e7..daa12199dcb 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3952f6af37b6a1c241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3952f6af37b6a1c241c2
-title: Крок 59
+title: Step 60
 challengeType: 0
-dashedName: step-59
+dashedName: step-60
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
index f8c65a1120c..1965ece89b8 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d39c156fe94b7482c3ab6.md
@@ -1,8 +1,8 @@
 ---
 id: 646d39c156fe94b7482c3ab6
-title: Крок 60
+title: Step 61
 challengeType: 0
-dashedName: step-60
+dashedName: step-61
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
index e41f70136b2..02175f4db5b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3b27cd3c56b875256301.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3b27cd3c56b875256301
-title: Крок 61
+title: Step 62
 challengeType: 0
-dashedName: step-61
+dashedName: step-62
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
index 328b3d9dc92..fe947d47bbc 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3bc75fe0c9b972da3323.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3bc75fe0c9b972da3323
-title: Крок 62
+title: Step 63
 challengeType: 0
-dashedName: step-62
+dashedName: step-63
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
index a0984e346cd..b0f6f065122 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3c146e10b0ba222bb2a7.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3c146e10b0ba222bb2a7
-title: Крок 63
+title: Step 64
 challengeType: 0
-dashedName: step-63
+dashedName: step-64
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
index 95573ac86e6..da106424308 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d037872fbbae0a8ec0e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d037872fbbae0a8ec0e
-title: Крок 64
+title: Step 65
 challengeType: 0
-dashedName: step-64
+dashedName: step-65
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
index 9f7abbe4c83..e15c70d89bc 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d65be79c8bb9c7df9ff.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d65be79c8bb9c7df9ff
-title: Крок 65
+title: Step 66
 challengeType: 0
-dashedName: step-65
+dashedName: step-66
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
index 8676d3aad9d..91cc4870d2b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3d80c3b4aebc4103618e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3d80c3b4aebc4103618e
-title: Крок 66
+title: Step 67
 challengeType: 0
-dashedName: step-66
+dashedName: step-67
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
index 16ae3e254bb..fe3493fc4c4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3da8501e15bcd355ba1d.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3da8501e15bcd355ba1d
-title: Крок 67
+title: Step 68
 challengeType: 0
-dashedName: step-67
+dashedName: step-68
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
index a1297d1deaa..cf94fec69d2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e135ab3abbdbfe5c899.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e135ab3abbdbfe5c899
-title: Крок 68
+title: Step 69
 challengeType: 0
-dashedName: step-68
+dashedName: step-69
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
index 2e2f8ec613b..7913a244f1f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3e64b15f92be6e61704e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3e64b15f92be6e61704e
-title: Крок 69
+title: Step 70
 challengeType: 0
-dashedName: step-69
+dashedName: step-70
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str
 Your callback function should use bracket notation to access the property of the `infixToFunction` object that matches the value of the `operator` parameter.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
index f9a657946ac..fa5d93b95fc 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3ee7b17ae3bf48610033.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3ee7b17ae3bf48610033
-title: Крок 70
+title: Step 71
 challengeType: 0
-dashedName: step-70
+dashedName: step-71
 ---
 
 # --description--
@@ -14,19 +14,19 @@ dashedName: step-70
 Функція зворотного виклику має повернути результат виклику `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(/);
 ```
 
 Передайте `arg1` як перший аргумент до виклику `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1/);
 ```
 
 Передайте `arg2` як другий аргумент до виклику `infixToFunction[operator]`.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*arg1\s*,\s*arg2\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
index 35239788a65..2145e640b31 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f1fd12f76c02c823bb8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f1fd12f76c02c823bb8
-title: Крок 71
+title: Step 72
 challengeType: 0
-dashedName: step-71
+dashedName: step-72
 ---
 
 # --description--
@@ -16,13 +16,13 @@ Wrap each of your `infixToFunction[operator]` arguments in a `parseFloat()` call
 You should wrap `arg1` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,/);
 ```
 
 You should wrap `arg2` in a `parseFloat()` call.
 
 ```js
-assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\[\s*operator\s*\]\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
+assert.match(code, /const\s+infixEval\s*=\s*\(\s*str\s*,\s*regex\s*\)\s*=>\s*str\.replace\(\s*regex\s*,\s*\(\s*_match\s*,\s*arg1\s*,\s*operator\s*,\s*arg2\s*\)\s*=>\s*infixToFunction\s*\[\s*operator\s*\]\s*\(\s*parseFloat\(\s*arg1\s*\)\s*,\s*parseFloat\(\s*arg2\s*\)\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
index 9f08d65f8b1..6ace0422044 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d3f718b5f8dc102cd528e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d3f718b5f8dc102cd528e
-title: Крок 72
+title: Step 73
 challengeType: 0
-dashedName: step-72
+dashedName: step-73
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
index 6ec6f25696a..2bbca0da557 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d404259f512c1a9e86ac1.md
@@ -1,8 +1,8 @@
 ---
 id: 646d404259f512c1a9e86ac1
-title: Крок 73
+title: Step 74
 challengeType: 0
-dashedName: step-73
+dashedName: step-74
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
index 26d3faae7cb..95f71226a89 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40c543943ec250039682.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40c543943ec250039682
-title: Крок 74
+title: Step 75
 challengeType: 0
-dashedName: step-74
+dashedName: step-75
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
index 41beba3932e..061ffc3214a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d40fe4b7b50c30c2b4cd8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d40fe4b7b50c30c2b4cd8
-title: Крок 75
+title: Step 76
 challengeType: 0
-dashedName: step-75
+dashedName: step-76
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
index 3eeb4eede58..b4d05d86a31 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d41e23b583fc3b8cc4579.md
@@ -1,8 +1,8 @@
 ---
 id: 646d41e23b583fc3b8cc4579
-title: Крок 76
+title: Step 77
 challengeType: 0
-dashedName: step-76
+dashedName: step-77
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
index 01566db7717..5dce75db5e0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d423fade4a9c4636acd13.md
@@ -1,8 +1,8 @@
 ---
 id: 646d423fade4a9c4636acd13
-title: Крок 77
+title: Step 78
 challengeType: 0
-dashedName: step-77
+dashedName: step-78
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
index 1811ef6e57b..ddad3e31b33 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d42f58deb2fc52adc6611.md
@@ -1,8 +1,8 @@
 ---
 id: 646d42f58deb2fc52adc6611
-title: Крок 78
+title: Step 79
 challengeType: 0
-dashedName: step-78
+dashedName: step-79
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
index 0c7f3484102..acfe55496ba 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d43587d926bc5b6cb2e50.md
@@ -1,8 +1,8 @@
 ---
 id: 646d43587d926bc5b6cb2e50
-title: Крок 79
+title: Step 80
 challengeType: 0
-dashedName: step-79
+dashedName: step-80
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
index 71f4381d783..5cfaebcd8b4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d448479c8fdc8dcec868c.md
@@ -1,8 +1,8 @@
 ---
 id: 646d448479c8fdc8dcec868c
-title: Крок 80
+title: Step 81
 challengeType: 0
-dashedName: step-80
+dashedName: step-81
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
index 22680f9146b..17684d27ec7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d44da986f2bc9b72f5fe2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d44da986f2bc9b72f5fe2
-title: Крок 81
+title: Step 82
 challengeType: 0
-dashedName: step-81
+dashedName: step-82
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
index a891d643ec5..66b7450b7c7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d451c2e44afca71b67818.md
@@ -1,8 +1,8 @@
 ---
 id: 646d451c2e44afca71b67818
-title: Крок 82
+title: Step 83
 challengeType: 0
-dashedName: step-82
+dashedName: step-83
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
index 1414cb1460a..f001891e41f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4554721d43cb19a68bc4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4554721d43cb19a68bc4
-title: Крок 83
+title: Step 84
 challengeType: 0
-dashedName: step-83
+dashedName: step-84
 ---
 
 # --description--
@@ -28,13 +28,13 @@ assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*cons
 Функція `apply` має отримати доступ до властивості об’єкта `spreadsheetFunctions`, що відповідає значенню `fn`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn/);
 ```
 
 Your `apply` function should call the `.toLowerCase()` method on `fn` in the property access.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]/);
 ```
 
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
index 24c33b71656..7f859e4879d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45b739da5ecbf830c108.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45b739da5ecbf830c108
-title: Крок 84
+title: Step 85
 challengeType: 0
-dashedName: step-84
+dashedName: step-85
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Your `apply` function is returning the spreadsheet function, but not actually ap
 Your `apply` function should call the `spreadsheetFunctions[fn.toLowerCase()]` function.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(/);
 ```
 
 Передайте виклик `toNumberList()` до виклику `spreadsheetFunctions[fn.toLowerCase()]`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(/);
 ```
 
 Передайте `args` до виклику `toNumberList()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[\s*fn\.toLowerCase\(\s*\)\s*\]\(\s*toNumberList\(\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
index 84e6b73e87a..1d4bdcf5fb0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d45ee725632cca2555146.md
@@ -1,8 +1,8 @@
 ---
 id: 646d45ee725632cca2555146
-title: Крок 85
+title: Step 86
 challengeType: 0
-dashedName: step-85
+dashedName: step-86
 ---
 
 # --description--
@@ -14,19 +14,19 @@ Now your `applyFunction` needs to return a result. Return the result of calling
 Функція `applyFunction` має повернути результат виклику методу `.replace()` на `str2`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(/);
 ```
 
 Передайте `functionCall` як перший аргумент до виклику `.replace()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall/);
 ```
 
 You should pass an empty arrow function as the second argument to your `.replace()` call.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*\)\s*=>\s*\{\s*\}/);
 ```
 
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
index 64c62d9c038..0488a52ca4f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4626420eeecd51f241c2.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4626420eeecd51f241c2
-title: Крок 86
+title: Step 87
 challengeType: 0
-dashedName: step-86
+dashedName: step-87
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Remember to make `fn` lower case.
 Функція зворотного виклику повинна мати `match` як перший параметр.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match/);
 ```
 
 Функція зворотного виклику повинна мати `fn` як другий параметр.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn/);
 ```
 
 Функція зворотного виклику повинна мати `args` як третій параметр.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>/);
 ```
 
 Функція зворотного виклику має використати неявне повернення.
 
 ```js
-assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
+assert.notMatch(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*\{/);
 ```
 
 Функція зворотного виклику має повернути результат виклику методу `.hasOwnProperty()` на об’єкті `spreadsheetFunctions`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(/);
 ```
 
 Передайте `fn` до методу `.hasOwnProperty()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn/);
 ```
 
 You should call the `.toLowerCase()` method on `fn`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
index c18564a26c0..9fb3cba2a17 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d467c6994f4ce0dc416a4.md
@@ -1,8 +1,8 @@
 ---
 id: 646d467c6994f4ce0dc416a4
-title: Крок 87
+title: Step 88
 challengeType: 0
-dashedName: step-87
+dashedName: step-88
 ---
 
 # --description--
@@ -14,31 +14,31 @@ Use the ternary operator to turn your `.hasOwnProperty()` call into the conditio
 Your callback function should use ternary syntax.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?/);
 ```
 
 If the ternary condition is true, your callback function should return the result of calling `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\s*\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\s*\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(/);
 ```
 
 Передайте `fn` як перший аргумент до виклику `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn/);
 ```
 
 Передайте `args` як другий аргумент до виклику `apply()`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)/);
 ```
 
 If the ternary is false, you should return `match`.
 
 ```js
-assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\[fn\.toLowerCase\(\)\]\(\s*toNumberList\(\s*args\s*\)\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
+assert.match(code, /const\s+applyFunction\s*=\s*\(?\s*str\s*\)?\s*=>\s*\{\s*const\s+noHigh\s*=\s*highPrecedence\(\s*str\s*\);?\s*const\s+infix\s*=\s*\/\(\[(?:\\d\.|\.\\d)\]\+\)\(\[(?:\+-|-\+)\]\)\(\[(?:\\d\.|\.\\d)\]\+\)\/;?\s*const\s+str2\s*=\s*infixEval\(\s*noHigh\s*\,\s*infix\s*\);?\s*const\s+functionCall\s*=\s*\/\(\[a-z\]\*\)\\\(\(\[0-9\., \]\*\)\\\)\(\?!\.\*\\\(\)\/i;?\s*const\s+toNumberList\s*=\s*\(?\s*args\s*\)?\s*=>\s*args\.split\(\s*('|"|`),\1\s*\)\.map\(\s*parseFloat\s*\);?\s*const\s+apply\s*=\s*\(\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\s*\[\s*fn\.toLowerCase\(\s*\)\s*\]\s*\(\s*toNumberList\(\s*args\s*\)\s*\);?\s*return\s+str2\.replace\(\s*functionCall\s*,\s*\(\s*match\s*,\s*fn\s*,\s*args\s*\)\s*=>\s*spreadsheetFunctions\.hasOwnProperty\(\s*fn\.toLowerCase\(\s*\)\s*\)\s*\?\s*apply\(\s*fn\s*,\s*args\s*\)\s*:\s*match/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
index 5ecce27b7e2..50071754013 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d46c03e7d02cecb30f021.md
@@ -1,8 +1,8 @@
 ---
 id: 646d46c03e7d02cecb30f021
-title: Крок 88
+title: Step 89
 challengeType: 0
-dashedName: step-88
+dashedName: step-89
 ---
 
 # --description--
@@ -14,25 +14,25 @@ Now you can start applying your function parser to your `evalFormula` logic. Dec
 Оголосіть змінну `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*/);
 ```
 
 Використайте `const`, щоб оголосити змінну `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*const\s+functionExpanded\s*=\s*/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*const\s+functionExpanded\s*=\s*/);
 ```
 
 You should assign the `functionExpanded` variable the result of calling your `applyFunction` function.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(/);
 ```
 
 Передайте `cellExpanded` до виклику `applyFunction`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
index 9895836cc82..74982cbd85f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4717a689e1cfa232e357.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4717a689e1cfa232e357
-title: Крок 89
+title: Step 90
 challengeType: 0
-dashedName: step-89
+dashedName: step-90
 ---
 
 # --description--
@@ -16,43 +16,43 @@ Use a ternary to check if `functionExpanded` is equal to the original string `x`
 Your `evalFormula` function should use the `return` keyword.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return/);
 ```
 
 Your `return` statement should check if `functionExpanded` is equal to `x`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)/);
 ```
 
 Your `return` statement should use a ternary operator.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?/);
 ```
 
 If the ternary condition is true, your `evalFormula()` should return `functionExpanded`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded/);
 ```
 
 If the ternary condition is false, your `evalFormula()` should return the result of calling `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(/);
 ```
 
 Передайте `functionExpanded` як перший аргумент до виклику `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded/);
 ```
 
 Передайте `cells` як другий аргумент до виклику `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\)\s*\)\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
+assert.match(code, /const\s+evalFormula\s*=\s*\(\s*x\s*,\s*cells\s*\)\s*=>\s*{\s*const\s+idToText\s*=\s*\(?\s*id\s*\)?\s*=>\s*cells\.find\(\s*\(?\s*cell\s*\)?\s*=>\s*(?:cell\.id\s*===\s*id|id\s*===\s*cell\.id)\s*\)\.value;?\s*const\s+rangeRegex\s*=\s*\/\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\):\(\[A-J\]\)\(\[1-9\]\[0-9\]\?\)\/(gi|ig);?\s*const\s+rangeFromString\s*=\s*\(\s*num1\s*,\s*num2\s*\)\s*=>\s*range\(\s*parseInt\(\s*num1\s*\)\s*,\s*parseInt\(\s*num2\s*\)\s*\);?\s*const\s+elemValue\s*=\s*\(?\s*num\s*\)?\s*=>\s*\(?\s*character\s*\)?\s*=>\s*idToText\(\s*character\s*\+\s*num\s*\);?\s*const\s+addCharacters\s*=\s*\(?\s*character1\s*\)?\s*=>\s*\(?\s*character2\s*\)?\s*=>\s*\(?\s*num\s*\)?\s*=>\s*charRange\(\s*character1\s*,\s*character2\s*\)\.map\(\s*elemValue\(\s*num\s*\)\s*\);?\s*const\s+rangeExpanded\s*=\s*x\.replace\(\s*rangeRegex\s*,\s*\(\s*_match\s*,\s*char1\s*,\s*num1\s*,\s*char2\s*,\s*num2\s*\)\s*=>\s*rangeFromString\(\s*num1\s*,\s*num2\s*\)\.map\(\s*addCharacters\s*\(\s*char1\s*\)\(\s*char2\s*\)\s*\)\s*\);?\s*const\s+cellRegex\s*=\s*\/\[A-J\]\[1-9\]\[0-9\]\?\/(gi|ig);?\s*const\s+cellExpanded\s*=\s*rangeExpanded\.replace\(\s*cellRegex\s*,\s*\(?\s*match\s*\)?\s*=>\s*idToText\(\s*match\.toUpperCase\(\s*\)\s*\)\s*\);?\s*(?:const|let|var)\s+functionExpanded\s*=\s*applyFunction\(\s*cellExpanded\s*\);?\s*return\s+(?:functionExpanded\s*===\s*x|x\s*===\s*functionExpanded)\s*\?\s*functionExpanded\s*:\s*evalFormula\(\s*functionExpanded\s*,\s*cells\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
index b2af32d11f2..c1249111d86 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4769ba65f1d05ef6b634.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4769ba65f1d05ef6b634
-title: Крок 90
+title: Step 91
 challengeType: 0
-dashedName: step-90
+dashedName: step-91
 ---
 
 # --description--
@@ -16,19 +16,19 @@ Inside your `if` statement, set the `value` of the `element` to be the result of
 You should update the `value` property of `element` in your `if` block.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value/);
 ```
 
 You should assign the `value` property the result of calling your `evalFormula()` function.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(/);
 ```
 
 You should not pass any arguments to your `evalFormula()` call.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
index 4fbade3dad7..d186967de6a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d47c8f58107d10f1e5106.md
@@ -1,8 +1,8 @@
 ---
 id: 646d47c8f58107d10f1e5106
-title: Крок 91
+title: Step 92
 challengeType: 0
-dashedName: step-91
+dashedName: step-92
 ---
 
 # --description--
@@ -14,19 +14,19 @@ The first argument for your `evalFormula` call needs to be the contents of the c
 Передайте `value` як перший аргумент до виклику `evalFormula()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value/);
 ```
 
 You should call the `.slice()` method on the `value` argument.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(/);
 ```
 
 Передайте число `1` як аргумент до виклику `.slice()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.(?:slice|substring)\(\s*1\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
index 3afb4f1b0e0..89c85aee7b6 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4813c17b37d1e261a566.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4813c17b37d1e261a566
-title: Крок 92
+title: Step 93
 challengeType: 0
-dashedName: step-92
+dashedName: step-93
 ---
 
 # --description--
@@ -14,19 +14,19 @@ You can quickly get all cells from your page by getting the `#container` element
 For the second parameter of your `evalFormula()` call, you should call the `.getElementById()` method of the `document` object.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(/);
 ```
 
 Передайте `container` як аргумент до виклику `.getElementById()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)/);
 ```
 
 Отримайте доступ до властивості `children` результату виклику `.getElementById()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
index ee70d3972ca..ac6184b9d56 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d486aec20f7d2a581cc36.md
@@ -1,8 +1,8 @@
 ---
 id: 646d486aec20f7d2a581cc36
-title: Крок 93
+title: Step 94
 challengeType: 0
-dashedName: step-93
+dashedName: step-94
 ---
 
 # --description--
@@ -14,7 +14,7 @@ Unfortunately, that `children` property is returning a collection of elements, w
 You should wrap your `document.getElementById('container').children` in `Array.from()`.
 
 ```js
-assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\[0\]\s*===\s*('|"|`)=\3|value\.charAt\(0\)\s*===\s*('|"|`)=\4|value\.startsWith\(('|"|`)=\5\))|(?:value\[0\]\s*===\s*('|"|`)=\6|value\.charAt\(0\)\s*===\s*('|"|`)=\7|value\.startsWith\(('|"|`)=\8\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
+assert.match(code, /const\s+update\s*=\s*\(?\s*event\s*\)?\s*=>\s*\{\s*const\s+element\s*=\s*event\.target;?\s*const\s+value\s*=\s*element\.value\.replace\(\s*\/\\s\/g\s*,\s*('|"|`)\1\s*\);?\s*if\s*\(\s*(!value\.includes\(\s*element\.id\s*\)\s*&&\s*(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\3|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\4|value\.startsWith\(\s*('|"|`)=\5\s*\))|(?:value\s*\[\s*0\s*\]\s*===\s*('|"|`)=\6|value\.charAt\(\s*0\s*\)\s*===\s*('|"|`)=\7|value\.startsWith\(\s*('|"|`)=\8\s*\))\s*\|\|\s*!value\.includes\(\s*element\.id\s*\))\s*\)\s*\{\s*element\.value\s*=\s*evalFormula\(\s*value\.slice\(\s*1\s*\)\s*,\s*Array\.from\(\s*document\.getElementById\(\s*('|"|`)container\9\s*\)\.children\s*\)\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
index 761ede230b2..c56ed340d5d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d48b936802fd34c3f05af.md
@@ -1,8 +1,8 @@
 ---
 id: 646d48b936802fd34c3f05af
-title: Крок 94
+title: Step 95
 challengeType: 0
-dashedName: step-94
+dashedName: step-95
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
index c3cca83dbd5..24d231d59cd 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d498c8ebc31d3f753b22e.md
@@ -1,8 +1,8 @@
 ---
 id: 646d498c8ebc31d3f753b22e
-title: Крок 95
+title: Step 96
 challengeType: 0
-dashedName: step-95
+dashedName: step-96
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
index a875412ce88..ae054d66d31 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d49bfff9079d4b38df115.md
@@ -1,8 +1,8 @@
 ---
 id: 646d49bfff9079d4b38df115
-title: Крок 96
+title: Step 97
 challengeType: 0
-dashedName: step-96
+dashedName: step-97
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
index 439ee4a014c..f2ef03abf7c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a07a8fb14d55cd70e09.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a07a8fb14d55cd70e09
-title: Крок 97
+title: Step 98
 challengeType: 0
-dashedName: step-97
+dashedName: step-98
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
index 701f77e12b7..46948631364 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a5b32a1cad6165df286.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a5b32a1cad6165df286
-title: Крок 99
+title: Step 100
 challengeType: 0
-dashedName: step-99
+dashedName: step-100
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
index c6a8036cfc1..edd37f7c3c4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4a8dbc04c6d6bb0001f8.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4a8dbc04c6d6bb0001f8
-title: Крок 100
+title: Step 101
 challengeType: 0
-dashedName: step-100
+dashedName: step-101
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
index 12019473e7b..055497a277b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4ab9b3b4c5d74fdd2154.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4ab9b3b4c5d74fdd2154
-title: Крок 101
+title: Step 102
 challengeType: 0
-dashedName: step-101
+dashedName: step-102
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
index 9b83d9025fa..14a954eae88 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/646d4b3d80ea98d824c8a4f9.md
@@ -1,8 +1,8 @@
 ---
 id: 646d4b3d80ea98d824c8a4f9
-title: Крок 102
+title: Step 103
 challengeType: 0
-dashedName: step-102
+dashedName: step-103
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
index bac00080f8e..4f559e3d745 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/6491d38f5b09a021c4b5d5fe.md
@@ -1,8 +1,8 @@
 ---
 id: 6491d38f5b09a021c4b5d5fe
-title: Крок 98
+title: Step 99
 challengeType: 0
-dashedName: step-98
+dashedName: step-99
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
new file mode 100644
index 00000000000..3a606f8e1cf
--- /dev/null
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-functional-programming-by-building-a-spreadsheet/65ae458e23954c3469e0c209.md
@@ -0,0 +1,104 @@
+---
+id: 65ae458e23954c3469e0c209
+title: Step 18
+challengeType: 0
+dashedName: step-18
+---
+
+
+# --description--
+
+In earlier projects you learned about the `setAttribute` method. Another way to update an attribute in JavaScript is to use the following syntax:
+
+```js
+el.attribute = value;
+```
+
+The property names for hyphenated HTML attribute values, such as `aria-label`, follow camel case, becoming `ariaLabel`.
+
+```js
+el.ariaLabel = "Aria Label Value";
+```
+
+Set the `aria-label` attribute for the `input` element to the same value as the `id` attribute.
+
+
+# --hints--
+
+You should have an `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=/);
+```
+
+
+You should assign `letter + number` to `input.ariaLabel`.
+
+```js
+assert.match(code, /input\.ariaLabel\s*=\s*letter\s*\+\s*number/);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="stylesheet" href="./styles.css" />
+    <title>Functional Programming Spreadsheet</title>
+  </head>
+  <body>
+    <div id="container">
+      <div></div>
+    </div>
+    <script src="./script.js"></script>
+  </body>
+</html>
+```
+
+```css
+#container {
+  display: grid;
+  grid-template-columns: 50px repeat(10, 200px);
+  grid-template-rows: repeat(11, 30px);
+}
+
+.label {
+  background-color: lightgray;
+  text-align: center;
+  vertical-align: middle;
+  line-height: 30px;
+}
+```
+
+```js
+const range = (start, end) => Array(end - start + 1).fill(start).map((element, index) => element + index);
+const charRange = (start, end) => range(start.charCodeAt(0), end.charCodeAt(0)).map(code => String.fromCharCode(code));
+
+window.onload = () => {
+  const container = document.getElementById("container");
+  const createLabel = (name) => {
+    const label = document.createElement("div");
+    label.className = "label";
+    label.textContent = name;
+    container.appendChild(label);
+  }
+  const letters = charRange("A", "J");
+  letters.forEach(createLabel);
+  range(1, 99).forEach(number => {
+     createLabel(number);
+--fcc-editable-region--
+    letters.forEach(letter => {
+     const input = document.createElement("input");
+     input.type = "text";
+     input.id = letter + number;
+
+    })   
+--fcc-editable-region--
+  })
+}
+```
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
index cc8e982d585..ea91592a60d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cad74fb5301287c572167.md
@@ -16,7 +16,7 @@ Now you should be able to roll the dice a few times and see the values update.
 You should call your `updateStats` function inside the `else` clause.
 
 ```js
-assert.match(code, /updateStats\(\)/)
+assert.match(code, /updateStats\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
index ec6710dbe86..0e8628f0753 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657caf204c0d672a35411c31.md
@@ -28,7 +28,7 @@ assert.match(code, /const\s+updateRadioOption\s*=\s*\(.*\)\s*=>\s*{\s*[\s\S]*};?
 Your `updateRadioOption` function should take `optionNode` and `score` as parameters.
 
 ```js
-assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\)\s*=>\s*{\s*[\s\S]*};?/)
+assert.match(code, /const\s+updateRadioOption\s*=\s*\(\s*optionNode\s*,\s*score\s*\)\s*=>\s*{\s*[\s\S]*};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
index 5d2ca9d35c4..0d1a20c7a91 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cc7c8bc1a5340a011f838.md
@@ -14,7 +14,7 @@ To enable the radio buttons, you should set the `disabled` property on `scoreInp
 You should assign `false` to `scoreInputs[optionNode].disabled`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.disabled\s*=\s*false/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.disabled\s*=\s*false/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
index 0ff7925d741..a113b4ed19d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cca458baba042a1b4eef9.md
@@ -14,7 +14,7 @@ Next, you will need to update the radio button's `value` to the current `score`.
 You should assign the `score` variable to `scoreInputs[optionNode].value`.
 
 ```js
-assert.match(code, /scoreInputs\[\s*optionNode\s*\]\.value\s*=\s*score/);
+assert.match(code, /scoreInputs\s*\[\s*optionNode\s*\]\s*\.value\s*=\s*score/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
index 08ef2eb327a..ce744214775 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657ccb8022b59543d2e391b7.md
@@ -14,7 +14,7 @@ To display the current score, update the text content for the `span` element nex
 You should set the `textContent` property for `scoreSpans[optionNode]` to the following template literal: `, score = ${score}`.
 
 ```js
-assert.match(code, /scoreSpans\[\s*optionNode\s*\]\.textContent\s*=\s*`, score = \${score}`;?/);
+assert.match(code, /scoreSpans\s*\[\s*optionNode\s*\]\s*\.textContent\s*=\s*`, score = \${score}`;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
index 0e094e6afef..b30649cac4c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cd762ea9e6a47c459ee8b.md
@@ -22,7 +22,7 @@ assert.match(code, /updateRadioOption\(.*\);?/);
 You should have the arguments of `0` and `10` for the `updateRadioOption` function.
 
 ```js
-assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.match(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
index 893a2a96525..d1ff45d93b8 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657cf2b586b3495a69394d7c.md
@@ -14,7 +14,7 @@ Now that you have verified the `updateRadioOption` function works, remove the fu
 You should remove the `updateRadioOption` function call from your `else` clause.
 
 ```js
-assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\);?/);
+assert.notMatch(code, /updateRadioOption\(\s*0\s*,\s*10\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
index b870e399235..f06543d5374 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d02cbb9c5416bef6a5023.md
@@ -18,19 +18,19 @@ Below your `if` statement, include an `else` clause that assigns `1` to `counts[
 You should have an `if` statement with a condition of `counts[num]`.
 
 ```js
-assert.match(code, /if\s*\(\s*counts\[num\]\s*\)/);
+assert.match(code, /if\s*\(\s*counts\s*\[\s*num\s*\]\s*\)/);
 ```
 
 You should use the `++` operator to increment the value of `counts[num]` by `1` inside your `if` statement.
 
 ```js
-assert.match(code, /counts\[num\]\s*\+\s*=\s*1|counts\[num\]\+\+/);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*\+\s*=\s*1|counts\s*\[\s*num\s*\]\s*\+\+/);
 ```
 
 You should assign `1` to `counts[num]` inside your `else` clause.
 
 ```js
-assert.match(code, /else\s*\{\s*counts\[num\]\s*=\s*1\s*;?\s*\}/);
+assert.match(code, /else\s*\{\s*counts\s*\[\s*num\s*\]\s*=\s*1\s*;?\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
index 594c69b99c0..aa7a673361c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d0b35f0d14873018d02fa.md
@@ -22,7 +22,7 @@ assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s
 You should assign `counts[num]` to your `count` variable.
 
 ```js
-assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\[num\]\s*;?\s*}/);
+assert.match(code, /for\s*\(\s*const\s+num\s+of\s+arr\s*\)\s*{\s*const\s+count\s*=\s*counts\s*\[\s*num\s*\]\s*;?\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
index f2fca09912a..7de9930adb4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657d397542d1a2162407ac39.md
@@ -16,7 +16,7 @@ Now, try rolling the dice again and you should see that the previous score `inpu
 You should call the `resetRadioOption` function inside the `rollDiceBtn` callback function.
 
 ```js
-assert.match(code, /resetRadioOption\(\);?/);
+assert.match(code, /resetRadioOption\(\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
index e7e3e69e148..043eb89ab37 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657dfeef78fe0364bd241d7f.md
@@ -22,7 +22,7 @@ assert.isFunction(resetGame);
 You should use arrow syntax for your `resetGame` function.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*}\s*;?/);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*}\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
index d278511ea9d..e1d7e471366 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e01b37d256166f84be8d5.md
@@ -24,25 +24,25 @@ assert.match(code, /diceValuesArr\s*=\s*\[\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s*,\s*0\s
 You should reassign the `score` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\bscore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `totalScore` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?\btotalScore\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `rolls` variable to `0`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?rolls\s*=\s*0\b.*?\s*}/s);
 ```
 
 You should reassign the `round` variable to `1`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?round\s*=\s*1\b.*?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
index 9ac5792b866..259da184ac5 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e033dcf624668a1a6180b.md
@@ -14,13 +14,13 @@ To reset each of the dice values to show `0`, apply a `forEach` method to the `l
 You should call the `forEach` method of the `listOfAllDice` variable.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(.*\)/s);
 ```
 
 For your callback function, you should use `dice` and `index` as parameters.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?listOfAllDice\.forEach\s*\(\s*\(\s*dice\s*,\s*index\s*\)\s*=>\s*{\s*}\s*\)/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
index e5a344733a0..fef565d78af 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e0485c9c0e469d6bc3ed1.md
@@ -14,13 +14,13 @@ Inside your callback function, update the `dice` text content by assigning it th
 You should access the `textContent` property of the `dice` parameter.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*/s);
 ```
 
 You should assign `diceValuesArr[index]` to `dice.textContent`.
 
 ```js
-assert.match(code, /const\s+resetGame\s*=\s*\(\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
+assert.match(code, /const\s+resetGame\s*=\s*\(\s*\)\s*=>\s*{\s*.*?dice\s*\.\s*textContent\s*=\s*diceValuesArr\s*\[\s*index\s*\]/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
index a8cf006eeb6..7367d6dae53 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e066025aa6c6b77f33a9b.md
@@ -20,25 +20,25 @@ Lastly, update the `currentRoundText` text content by assigning it the `round` v
 You should assign `totalScore` to `totalScoreText.textContent`.
 
 ```js
-assert.match(code, /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
+assert.match(resetGame.toString(), /totalScoreText\s*\.\s*textContent\s*=\s*totalScore\s*;?/);
 ```
 
 You should use the `innerHTML` property to set the `scoreHistory` to an empty string.
 
 ```js
-assert.match(code, /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
+assert.match(resetGame.toString(), /scoreHistory\s*\.\s*innerHTML\s*=\s*('|"|`)\s*\1\s*;?/);
 ```
 
 You should assign `rolls` to `currentRoundRollsText.textContent`.
 
 ```js
-assert.match(code, /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
+assert.match(resetGame.toString(), /currentRoundRollsText\s*\.\s*textContent\s*=\s*rolls\s*;?/);
 ```
 
 You should assign `round` to `currentRoundText.textContent`.
 
 ```js
-assert.match(code, /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
+assert.match(resetGame.toString(), /currentRoundText\s*\.\s*textContent\s*=\s*round\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
index 7469bf23af8..77d1003ce80 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e13351e0232761a908609.md
@@ -16,7 +16,7 @@ Assign the entire result of your `ternary` to `counts[num]`.
 You should assign `counts[num] ? counts[num] + 1 : 1` to `counts[num]` in the `for...of` loop.
 
 ```js
-assert.match(code, /counts\[num\]\s*=\s*counts\[num\]\s*\?\s*counts\[num\]\s*\+\s*1\s*:\s*1\s*;?/s);
+assert.match(code, /counts\s*\[\s*num\s*\]\s*=\s*counts\s*\[\s*num\s*\]\s*\?\s*counts\s*\[\s*num\s*\]\s*\+\s*1\s*:\s*1\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
index 22c916525ce..b32ef487eb2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e14fb165435777a597aea.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasThreeOfAKind\s*=/);
 You should assign `Object.values(counts)` to your `hasThreeOfAKind` variable.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(3)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(counts\)\.includes\(3\)\s*;?/);
+assert.match(code, /const\s+hasThreeOfAKind\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*3\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
index 195ba652bf2..ad8809cdf97 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e180ad0a77c79d8b4b82e.md
@@ -26,13 +26,13 @@ assert.match(code, /const\s+hasPair\s*=/);
 You should assign `Object.values(counts)` to your `hasPair` variable.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\).*/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\).*/);
 ```
 
 You should chain `.includes(2)` to your `Object.values(counts)`.
 
 ```js
-assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(counts\)\.includes\(2\)\s*;?/);
+assert.match(code, /const\s+hasPair\s*=\s*Object\.values\(\s*counts\s*\)\.includes\(\s*2\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
index f597fc18fc3..3f535d4d89d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e253cf2c01685ed84c1ee.md
@@ -36,7 +36,7 @@ assert.match(code, /const\s+sortedNumbersArr\s*=\s*arr\.sort\(.*\);?/);
 Your callback function should use `a` and `b` for the parameters and implicitly return `a - b`.
 
 ```js
-assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(a,\s*b\)\s*=>\s*a\s*-\s*b\s*\));?/);
+assert.match(code, /const\s+sortedNumbersArr\s*=\s*(?:arr\.sort\(\s*\(\s*a,\s*b\s*\)\s*=>\s*a\s*-\s*b\s*\));?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
index bee0f5fd723..8dc77d2b8c5 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2d01d1a086908d3c9d32.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+smallStraightsArr\s*=?\s*;?/);
 You should store the strings `1234`, `2345` and `3456` in an array and assign it to your `smallStraightsArr`.
 
 ```js
-assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\];?/);
+assert.match(code, /const\s+smallStraightsArr\s*=\s*\[\s*('|")1234\1\s*,\s*('|")2345\2\s*,\s*('|")3456\3\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
index ace279aaae2..12f1db7a494 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2e1f5fb69291b1294388.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+largeStraightsArr\s*=?\s*;?/);
 You should store the strings `12345` and `23456` in an array and assign it to your `largeStraightsArr`.
 
 ```js
-assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\];?/);
+assert.match(code, /const\s+largeStraightsArr\s*=\s*\[\s*('|")12345\1\s*,\s*('|")23456\2\s*\]\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
index fd1d1eb1fa0..f2d4e4a83b4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e2ecee9f60092c89338d9.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `smallStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `3` and `30` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*smallStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*3\s*,\s*30\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
index 7fae83cead0..1c742691b36 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-algorithmic-thinking-by-building-a-dice-game/657e30e116d50c946b189925.md
@@ -16,13 +16,13 @@ Start by creating an `if` statement to check if `uniqueNumbersStr` is included i
 You should use the `includes` method to check if `uniqueNumbersStr` is included in the `largeStraightsArr`.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?/);
 ```
 
 You should call your `updateRadioOption` with `4` and `40` for the arguments.
 
 ```js
-assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(uniqueNumbersStr\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
+assert.match(code, /if\s*\(\s*largeStraightsArr\.includes\(\s*uniqueNumbersStr\s*\)\s*\)\s*{?\s*updateRadioOption\s*\(\s*4\s*,\s*40\s*\)\s*;?\s*}?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
index 7a22d44cb92..44820bc1080 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64acf287857bb38e6dd7ca69.md
@@ -16,7 +16,7 @@ Inside the `animate` function, create an `if` statement where the condition chec
 You should have an `if` statement that checks if the right key was pressed and the player's `x` position is less than 400.
 
 ```js
-assert.match(animate.toString(), /keys\.rightKey\.pressed\s*&&\s*player\.position\.x\s*<\s*400/);
+assert.match(animate.toString(), /keys\.rightKey\.(pressed|pressed\s*===\s*true)\s*&&\s*player\.position\.x\s*<\s*400/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
index 4cc29d412a3..2d199656c62 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c764dd9071050d0a2c1473.md
@@ -30,7 +30,7 @@ assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*
 You should call the `draw` method on each `platform`.
 
 ```js
-assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\)\s*;?\s*}?\s*\);?/);
+assert.match(code, /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*{?\s*platform\.draw\(\s*\)\s*;?\s*}?\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
index 9e37e70b456..01406bd618a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e4cc5f06902dc75dc8f4.md
@@ -26,7 +26,7 @@ Your callback function should have a `platform` parameter.
 
 ```js
 const splitter = code.split("platform.position.x += 5;")
-assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\);?/);
+assert.match(splitter[1], /platforms\.forEach\(\s*(\(\s*platform\s*\)|platform)\s*=>\s*\{\s*\}\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
index 11df51150b8..ff3c5856e39 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64c9e90c433fde2e870285a3.md
@@ -9,17 +9,17 @@ dashedName: step-78
 
 Inside the callback function, create a new `const` variable called `collisionDetectionRules` and assign it an empty array.
 
-Inside that array, add a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+Inside that array, add a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 # --hints--
 
 You should have a `const` variable called `collisionDetectionRules` that is assigned an empty array.
 
 ```js
-assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\];?/);
+assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*(?:[^\]]*\s*)*\s*\]\s*;?/);
 ```
 
-You should have a boolean expression that checks if the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
+You should have a boolean expression that checks whether the player's `y` position plus the player's height is less than or equal to the platform's `y` position.
 
 ```js
 assert.match(code, /const\s+collisionDetectionRules\s*=\s*\[\s*player\.position\.y\s*\+\s*player\.height\s*<=\s*platform\.position\.y\s*,?\s*]\s*;?/);
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
index e457caf2f09..a5e1add94f3 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeb134c3cdc5498cd75b9.md
@@ -14,7 +14,7 @@ Inside that array, add a boolean expression that checks if the player's `x` posi
 You should have a boolean expression that checks if the player's `x` position is greater than or equal to the platform's `x` position minus half of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
index 83ea7739e65..c7858e93493 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caeeae2fa57756035d6012.md
@@ -14,7 +14,7 @@ Below that boolean expression, add another boolean expression that checks if the
 You should have a boolean expression that checks if the player's `x` position is less than or equal to the sum of the platform's `x` position and the platform's width minus one third of the player's width.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,?\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
index 366f59302d4..2dfaffa25a0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64caf1be15606d5814c3387b.md
@@ -16,21 +16,21 @@ Below that, add another boolean expression that checks if the player's `y` posit
 You should not alter the existing `platformDetectionRules` array and its content.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*.*\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position plus the player's height is greater than or equal to the platform's `y` position.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*.*\s*\]\s*;?/)
 
 ```
 
 You should have a boolean expression that checks if the player's `y` position is less than or equal to the sum of the platform's `y` position plus the platform's height.
 
 ```js
-assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\];?/)
+assert.match(code, /const\s+platformDetectionRules\s+=\s*\[\s*player\.position\.x\s*>=\s*platform\.position\.x\s*-\s*player\.width\s*\/\s*2,?\s*player\.position\.x\s*<=\s*platform\.position\.x\s*\+\s*platform\.width\s*-\s*player\.width\s*\/\s*3,\s*player\.position\.y\s*\+\s*player\.height\s*>=\s*platform\.position\.y,\s*player\.position\.y\s*<=\s*platform\.position\.y\s*\+\s*platform\.height,?\s*\]\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
index e4524d27fbd..cd25ef448d0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb2e5bdfb23a67272a07c7.md
@@ -19,21 +19,21 @@ Your `CheckPoint` class should have a `draw` method.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{/);
 ```
 
 Your `draw` method should have a `fillStyle` property.
 
 ```js
 const splitter = code.split("ctx.fillRect(this.position.x, this.position.y, this.width, this.height)")
-assert.match(splitter[2], /draw\(\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
+assert.match(splitter[2], /draw\(\s*\)\s*\{\s*ctx\.fillStyle\s*=\s*('|")#f1be32\1;?/);
 ```
 
 Your `draw` method should have a `fillRect` method.
 
 ```js
 const splitter = code.split('#f1be32')
-assert.match(splitter[1], /ctx\.fillRect\(this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\);?/);
+assert.match(splitter[1], /ctx\.fillRect\(\s*this\.position\.x,\s*this\.position\.y\s*,\s*this\.width,\s*this\.height\s*\);?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
index 4c62277a2c4..ae613988679 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb34c01b3d856a9a59261d.md
@@ -25,14 +25,14 @@ assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\([^
 Your callback function should have a `checkpoint` parameter.
 
 ```js
-assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*[^)]*\s*\)\s*;?/);
+assert.match(code, /\s*const\s+checkpoints\s*=\s*checkpointPositions\.map\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*[^)]*\s*\)\s*;?/);
 
 ```
 
 You should implicitly return a new `CheckPoint` instance.
 
 ```js
-assert.match(code, /\s*checkpointPositions\.map\s*\(\s*\(?checkpoint\)?\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
+assert.match(code, /\s*checkpointPositions\.map\s*\(\s*(\(checkpoint\s*\)|checkpoint)\s*=>\s*new\s+CheckPoint\s*\(\s*checkpoint\.x\s*,\s*checkpoint\.y\s*\)\s*\)\s*;?/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
index 96fcc420ae5..eace22a29b9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb3f62b10c336bada1c70c.md
@@ -24,13 +24,13 @@ assert.match(code, /\bcheckpoints\b\s*\.\s*forEach\s*\(/s);
 You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*checkpoint\s*=>\s*{/s);
+assert.match(code, /\s*checkpoints\s*\.\s*forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*{?/s);
 ```
 
 You should call the `draw` method on each `checkpoint` inside the `forEach` callback function.
 
 ```js
-assert.match(code, /\s*checkpoints\.forEach\s*\(\s*checkpoint\s*=>\s*{\s*checkpoint\.draw\(\s*\);?\s*}\s*\);?/s);
+assert.match(code, /\s*checkpoints\.forEach\s*\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*(\{\s*checkpoint\.draw\(\s*\)\s*;?\s*\}|checkpoint\.draw\(\s*\))\s*\)\s*;?/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
index fce607694b2..be662bbf905 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb472593e3be6d10a7c13b.md
@@ -24,7 +24,7 @@ You should have a `checkpoint` parameter inside the `forEach` callback function.
 
 ```js
 const splitter = code.split("if (keys.rightKey.pressed && isCheckpointCollisionDetectionActive)")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(?checkpoint\)?\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*(\(\s*checkpoint\s*\)|checkpoint)\s*=>\s*\{/);
 ```
 
 You should use the subtraction assignment operator to subtract 5 from the `checkpoint`'s `x` position.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
index 18654ebae36..cd2a5d8f29e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb4ebdc75b3a73a43da5ec.md
@@ -42,7 +42,7 @@ assert.match(code, /\s*setTimeout\s*\(\s*\(\s*\)\s*=>[^,]*,\s*2000\s*\)/s);
 Your callback function should set the `checkpointScreen` `display` property to `none`.
 
 ```js
-assert.match(code, /\s*if\s*\(isCheckpointCollisionDetectionActive\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
+assert.match(code, /\s*if\s*\(\s*isCheckpointCollisionDetectionActive\s*\)\s*{\s*setTimeout\s*\(\s*\(\s*\)\s*=>\s*(\(\s*checkpointScreen\.style\.display\s*=\s*("|')none\2\s*\)|\{\s*checkpointScreen\.style\.display\s*=\s*("|')none\3\s*;?\s*\}|\s*checkpointScreen\.style\.display\s*=\s*("|')none\4\s*)\s*,\s*2000\s*\)\s*;?\s*}/s);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
index 729d14e71df..3447a16f619 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/64cb50fd95831a745ea60d13.md
@@ -24,7 +24,7 @@ Your callback function should have a `checkpoint` parameter and `index`.
 
 ```js
 const splitter = code.split("player.velocity.y = gravity;")
-assert.match(splitter[1], /checkpoints\.forEach\(\s*\(checkpoint,\s*index\)\s*=>\s*\{/);
+assert.match(splitter[1], /checkpoints\.forEach\(\s*\(\s*checkpoint,\s*index\s*\)\s*=>\s*\{/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
index 7e5208ed067..ccaefaf2276 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/6507512fe521de40085b8831.md
@@ -14,7 +14,7 @@ Inside the `if` statement, call the `claim` method on the `checkpoint` object.
 You should call the `claim()` method on the `checkpoint` object.
 
 ```js
-assert.match(code, /checkpoint\.claim\(\);?/)
+assert.match(code, /checkpoint\.claim\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
index 71e7052eae3..6e2722bd58e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-intermediate-oop-by-building-a-platformer-game/650756e20cffbe41305a0dde.md
@@ -24,7 +24,7 @@ assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\
 You should call the `showCheckpointScreen` function and pass in "You reached the final checkpoint!" as an argument.
 
 ```js
-assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\);?/)
+assert.match(code, /if\s*\(\s*index\s*===\s*checkpoints\.length\s*-\s*1\s*\)\s*\{\s*isCheckpointCollisionDetectionActive\s*=\s*false;?\s*showCheckpointScreen\(\s*("|'|`)You\s+reached\s+the\s+final\s+checkpoint!\1\s*\);?/)
 ```
 
 You should call the `movePlayer` function and pass in the provided arguments.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
index 9110cbe587b..278a2ba77ae 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e4c4ec263b62ae7bf54d.md
@@ -18,37 +18,37 @@ Begin by accessing the `task-form`, `confirm-close-dialog`, and `open-task-form-
 Використайте `getElementById()`, щоб отримати доступ до елемента `task-form`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 You should assign the `task-form` element to the variable `taskForm`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\);?/)
+assert.match(code, /const\s+taskForm\s*=\s*document\.getElementById\(\s*('|"|`)task\-form\1\s*\);?/)
 ```
 
 Використайте `getElementById()`, щоб отримати доступ до елемента `confirm-close-dialog`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 You should assign the `confirm-close-dialog` element to the variable `confirmCloseDialog`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\);?/)
+assert.match(code, /const\s+confirmCloseDialog\s*=\s*document\.getElementById\(\s*('|"|`)confirm\-close\-dialog\1\s*\);?/)
 ```
 
 Використайте `getElementById()`, щоб отримати доступ до елемента `open-task-form-btn`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `open-task-form-btn` element to the variable `openTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+openTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)open\-task\-form\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
index 180e7d082c6..32c795f5885 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6c86954de67a3e44ee3.md
@@ -14,37 +14,37 @@ You need to access more elements with the `getElementById()` method. This time y
 Використайте `getElementById()`, щоб отримати доступ до елемента `close-task-form-btn`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 You should assign the `close-task-form-btn` element to the variable `closeTaskFormBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\);?/)
+assert.match(code, /const\s+closeTaskFormBtn\s*=\s*document\.getElementById\(\s*('|"|`)close\-task\-form\-btn\1\s*\);?/)
 ```
 
 Використайте `getElementById()`, щоб отримати доступ до елемента `add-or-update-task-btn`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 You should assign the `add-or-update-task-btn` element to the variable `addOrUpdateTaskBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\);?/)
+assert.match(code, /const\s+addOrUpdateTaskBtn\s*=\s*document\.getElementById\(\s*('|"|`)add\-or\-update\-task\-btn\1\s*\);?/)
 ```
 
 Використайте `getElementById()`, щоб отримати доступ до елемента `cancel-btn`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 You should assign the `cancel-btn` element to the variable `cancelBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\);?/)
+assert.match(code, /const\s+cancelBtn\s*=\s*document\.getElementById\(\s*('|"|`)cancel\-btn\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
index 5efc9ce90e2..5bac8a11981 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e6fe78b5aa67ef2fc3e7.md
@@ -14,37 +14,37 @@ Next, access the `discard-btn`, `tasks-container`, and `title-input` elements us
 Використайте `getElementById()`, щоб отримати доступ до елемента `discard-btn`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 You should assign the `discard-btn` element to the variable `discardBtn`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\);?/)
+assert.match(code, /const\s+discardBtn\s*=\s*document\.getElementById\(\s*('|"|`)discard\-btn\1\s*\);?/)
 ```
 
 Використайте `getElementById()`, щоб отримати доступ до елемента `tasks-container`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 You should assign the `tasks-container` element to the variable `tasksContainer`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\);?/)
+assert.match(code, /const\s+tasksContainer\s*=\s*document\.getElementById\(\s*('|"|`)tasks\-container\1\s*\);?/)
 ```
 
 Використайте `getElementById()`, щоб отримати доступ до елемента `title-input`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 You should assign the `title-input` element to the variable `titleInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\);?/)
+assert.match(code, /const\s+titleInput\s*=\s*document\.getElementById\(\s*('|"|`)title\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
index fa5c4892a26..a3fb63923de 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7241f52bb682eeb8211.md
@@ -14,25 +14,25 @@ The last set of elements you need to get from the HTML file are the `date-input`
 Використайте `getElementById()`, щоб отримати доступ до елемента `date-input`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 You should assign the `date-input` element to the variable `dateInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\);?/)
+assert.match(code, /const\s+dateInput\s*=\s*document\.getElementById\(\s*('|"|`)date\-input\1\s*\);?/)
 ```
 
 Використайте `getElementById()`, щоб отримати доступ до елемента `description-input`.
 
 ```js
-assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 You should assign the `description-input` element to the variable `descriptionInput`. Don't forget to use `const` to declare the variable.
 
 ```js
-assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\);?/)
+assert.match(code, /const\s+descriptionInput\s*=\s*document\.getElementById\(\s*('|"|`)description\-input\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
index b71891e69b0..bc8099b1c37 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e74d0fb4f0687bf4145d.md
@@ -13,16 +13,40 @@ Use `let` to create a `currentTask` variable and set it to an empty object. This
 
 # --hints--
 
-You should create a `taskData` constant set to an empty array.
+You should have a `const` variable called `taskData`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=/)
 ```
 
-You should use `let` to create an empty `currentTask` object.
+You should assign an array to your `taskData` constant.
 
 ```js
-assert.match(code, /let\s+currentTask\s*=\s*\{\};?/)
+assert.isArray(taskData);
+```
+
+Your `taskData` array should be empty.
+
+```js
+assert.isEmpty(taskData);
+```
+
+You should use `let` to create a `currentTask` variable.
+
+```js
+assert.match(code, /let\s+currentTask/);
+```
+
+You should assign an object to your `currentTask` variable.
+
+```js
+assert.isObject(currentTask);
+```
+
+Your `currentTask` object should be empty.
+
+```js
+assert.isEmpty(currentTask);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
index b0604d7d37b..df2c1d73ce1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4e7bbedb22d6939001ad3.md
@@ -7,9 +7,15 @@ dashedName: step-7
 
 # --description--
 
-Add a `click` event listener to the `closeTaskFormBtn` variable, then use the `showModal()` method on your `confirmCloseDialog` variable. This will display a modal with the `Discard` and `Cancel` buttons.
+The HTML `dialog` element has a `showModal()` method that can be used to display a modal dialog box on a web page.
 
-`showModal()` is a method associated with the HTML `dialog` element. It is used to display a modal dialog box on a web page.
+```js
+dialogElement.showModal();
+```
+
+Add an event listener to the `closeTaskFormBtn` variable and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `showModal()` method on the `confirmCloseDialog` element. This will display a modal with the `Discard` and `Cancel` buttons.
 
 # --hints--
 
@@ -22,13 +28,13 @@ assert.match(code, /closeTaskFormBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `showModal()` method on `confirmCloseDialog`.
+Your event listener's callback function should call the `showModal()` method on the `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /closeTaskFormBtn\.addEventListener\(('|"|`)click\1,\s*\(.*\)\s*=>\s*{?\s*confirmCloseDialog\.showModal\(\);?\s*}?\s*\);?/)
+assert.match(code, /closeTaskFormBtn\.addEventListener\(\s*('|"|`)click\1,\s*\(.*\)\s*=>\s*(\{\s*confirmCloseDialog\.showModal\(\s*\)\s*;?\s*\}|confirmCloseDialog\.showModal\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
index de0fdb1970c..00c8e529c5c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eaaa9070a66aecbfe603.md
@@ -7,11 +7,15 @@ dashedName: step-8
 
 # --description--
 
-If the user clicks the `Cancel` button, you want to cancel the process (close the modal showing the two buttons) so the user can continue editing.
+If the user clicks the `Cancel` button, you want to cancel the process and close the modal so the user can continue editing. The HTML `dialog` element has a `close()` method that can be used to close a modal dialog box on a web page.
 
-Add a `click` event listener to the `cancelBtn` element, then use the `close()` method on the `confirmCloseDialog` variable.
+```js
+dialogElement.close();
+```
 
-`close()` is a method of the window object you can use to close the current window, or a modal you create with the `dialog` element.
+Add an event listener to the `cancelBtn` element and pass in a `click` event for the first argument and a callback function for the second argument.
+
+For the callback function, call the `close()` method on the `confirmCloseDialog` element.
 
 # --hints--
 
@@ -24,13 +28,13 @@ assert.match(code, /cancelBtn\.addEventListener\(/)
 Your event listener should listen for a `click` event.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1/)
 ```
 
-Your event listener should use arrow syntax to set the `close()` method on `confirmCloseDialog`. Don't use curly braces.
+Your event listener's callback function should call the `close()` method on `confirmCloseDialog` element.
 
 ```js
-assert.match(code, /cancelBtn\.addEventListener\(('|"|`)click\1\,\s*\(\)\s*\s*=>\s*confirmCloseDialog\.close\(\)\s*\);?/)
+assert.match(code, /cancelBtn\.addEventListener\(\s*('|"|`)click\1\s*\,\s*\(\s*\)\s*=>\s*(\{\s*confirmCloseDialog\.close\(\s*\)\s*;?\s*\}|confirmCloseDialog\.close\(\s*\))\s*\)\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
index 815a82b57c0..046e66a74d9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ebc7eabc5a6babd479cd.md
@@ -28,19 +28,19 @@ assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1/)
 You should use arrow syntax to set your event listener to an empty pair of curly braces.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 Your event listener should use the `close()` method on `confirmCloseDialog`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?/)
 ```
 
 Your event listener should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
-assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\);?/)
+assert.match(code, /discardBtn\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*confirmCloseDialog\.close\(\s*\);?\s*taskForm\.classList\.toggle\(\s*('|"|`)hidden\2\s*\);?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
index 54e6262d83c..afe3347655d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4ecd7735a566c9266a338.md
@@ -22,19 +22,19 @@ assert.match(code, /taskForm\.addEventListener\(/)
 Your event listener should listen for a `submit` event.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1/)
 ```
 
 You should use arrow syntax to set your event listener to an empty pair of curly braces with `e` as the parameter.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{/)
 ```
 
 You should use the `e.preventDefault()` method to stop the browser from reloading the page.
 
 ```js
-assert.match(code, /taskForm\.addEventListener\(('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\);?/)
+assert.match(code, /taskForm\.addEventListener\(\s*('|"|`)submit\1,\s*(\(\s*e\s*\)|e)\s*=>\s*\{\s*e\.preventDefault\(\s*\)\s*;?\s*\}\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
index 9f75b7aeab9..3812b481276 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4eec13546c06d61a63d59.md
@@ -35,13 +35,13 @@ assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 You should pass in `item` as the parameter of the arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === currentTask.id`.
 
 ```js
-assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\(?item\)?\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
+assert.match(code, /const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*item\.id\s*===\s*currentTask\.id\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
index 16d28860db7..4d855bf92f7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64e4f01d6c72086e016a8626.md
@@ -30,19 +30,19 @@ assert.match(code, /const\s+taskObj\s*=\s*\{\s*id/)
 You should use template strings to get `titleInput.value` as the value of your `id` key and convert it to lowercase.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)/)
 ```
 
 You should use `.split(' ')` on `titleInput.value.toLowerCase()`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(('|")\s{1}\1\)/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)/)
 ```
 
 You should use `.join('-')` on `titleInput.value.toLowerCase().split(' ')`.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
index 476d9eb2501..7f4032bbced 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec8f717b261e824d82d6a5.md
@@ -20,13 +20,13 @@ Create an `if` statement with the condition `dataArrIndex === -1`. Within the `i
 You should create an `if` statement with the condition `dataArrIndex === -1`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{/)
 ```
 
 Your `if` statement should have `taskData.unshift(taskObj)` in it's body.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}/)
 ```
 
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
index b723c68b881..b1de00ff944 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9282cd547785258cecf2.md
@@ -26,7 +26,7 @@ assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*(\s*\{?\(\s*ta
 You should use addition assignment to set the `innerHTML` of `tasksContainer` to an empty pair of backticks.
 
 ```js
-assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\)?\s*\}?)/)
+assert.match(code, /taskData\.forEach\(\s*\(\s*\{.*\}\s*\)\s*=>\s*\{?\s*(\s*\(?tasksContainer\.innerHTML\s*\+=\s*`\s*`\s*\)?\s*\}?)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
index d27fbaed20f..52069443fec 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9b10356c2d8aa05d9ce1.md
@@ -15,7 +15,7 @@ You should use `classList` to toggle the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("taskData.forEach")[1].split("});")
-assert.match(splitter[0], /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(splitter[0], /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
index 39300362b51..4229105813a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ec9c55fdeef78bacd2fc3b.md
@@ -18,13 +18,13 @@ Use arrow syntax to create a `reset` function and set it to a pair of curly brac
 You should use `const` and arrow syntax to create a `reset` function.
 
 ```js
-assert.match(code, /const\s+reset\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+reset\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 Your `reset` function should be empty.
 
 ```js
-assert.match(reset.toString(), /\(\)\s*\{\s*\}/);
+assert.match(reset.toString(), /\(\s*\)\s*\{\s*\}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
index 3e655f57cd1..a8c346c2d9a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac365aeb8ad70b69b366f.md
@@ -34,7 +34,7 @@ assert.match(reset.toString(), /descriptionInput\.value\s*=\s*('|")\1;?/)
 You should use `classList` to toggle the class `hidden` on `taskForm`
 
 ```js
-assert.match(reset.toString(), /taskForm\.classList\.toggle\(('|")hidden\1\)/)
+assert.match(reset.toString(), /taskForm\.classList\.toggle\(\s*('|")hidden\1\s*\)/)
 ```
 
 You should set `currentTask` to an empty object.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
index e69fb3eca1f..a8fd9e06ba2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac4d1773e7a719b1254de.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the `hidden` class on `taskForm`.
 
 ```js
 const splitter = code.split('<button type="button" class="btn">Delete</button>')
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /reset\(\)/)
+assert.match(code, /reset\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
index c370eef2af3..2f4dde2d15a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fac6a497811572b338e5e5.md
@@ -15,13 +15,13 @@ Yous should remove the code toggling the class `hidden` on `taskForm`.
 
 ```js
 const splitter = code.split("confirmCloseDialog.close();")
-assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(("|')hidden\1\);?/)
+assert.notMatch(splitter[1], /taskForm\.classList\.toggle\(\s*("|')hidden\1\s*\);?/)
 ```
 
 You should call the `reset` function.
 
 ```js
-assert.match(code, /confirmCloseDialog\.close\(\);?\s*reset\(\);?/)
+assert.match(code, /confirmCloseDialog\.close\(\s*\);?\s*reset\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
index 363e6794b07..f7ae30ef660 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faca774fd9fd74bc084cc9.md
@@ -16,7 +16,7 @@ To begin, within the `closeTaskFormBtn` event listener, create a `formInputsCont
 You should use `const` to create a variable `formInputsContainValues` with the value `titleInput.value || dateInput.value || descriptionInput.value;`
 
 ```js
-assert.match(code, /const\s+formInputsContainValues\s*=\s*titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value;?/)
+assert.match(code, /const\s+formInputsContainValues\s*=\s*(titleInput\.value\s*\|\|\s*dateInput\.value\s*\|\|\s*descriptionInput\.value|titleInput\.value\s*!==\s*null\s*\|\|\s*dateInput\.value\s*!==\s*null\s*\|\|\s*descriptionInput\.value\s*!==\s*null)\;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
index ab4b7acde74..7765f732128 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64facf6180824876f70a2e86.md
@@ -14,25 +14,25 @@ Create an `if` statement to check if `formInputsContainValues` is true. If `form
 You should create an `if` statement with the condition `formInputsContainValues`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{/)
 ```
 
 The `if` block of your `if` statement should contain `confirmCloseDialog.showModal();`.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?/)
 ```
 
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{/)
 ```
 
 You should call the `reset()` function in the `else` block of your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(formInputsContainValues\)\s*\{\s*confirmCloseDialog\.showModal\(\);?\s*\}\s*else\s*\{\s*reset\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*formInputsContainValues\s*\)\s*\{\s*confirmCloseDialog\.showModal\(\s*\);?\s*\}\s*else\s*\{\s*reset\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
index cee5838198f..83e13e8b1fe 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad07f43a101779cb8692a.md
@@ -16,7 +16,7 @@ Use arrow syntax to create an `addOrUpdateTask` function. Then move the `dataArr
 You should use `const` and arrow syntax to create an `addOrUpdateTask` function.
 
 ```js
-assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should move the `dataArrIndex` variable into the `addOrUpdateTask` function.
@@ -31,7 +31,7 @@ You should move the `taskObj` object into the `addOrUpdateTask` function.
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?/)
 ```
 
-You should move the `if` statement with the condition `dataArrIndex === 1` into your `addOrUpdateTask` function.
+You should move the `if` statement with the condition `dataArrIndex === -1` into your `addOrUpdateTask` function.
 
 ```js
 assert.match(code, /const\s+addOrUpdateTask\s*=\s*\(\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(?:\(\s*item\s*\)|item)\s*=>\s*(?:item\.id\s*===\s*currentTask\.id|currentTask\.id\s*===\s*item\.id)\s*\)\s*;?\s*const\s+taskObj\s*=\s*\{\s*id\s*:\s*`\$\{\s*titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\s*\}-\$\{\s*Date\.now\(\s*\)\s*\}`\s*,\s*title\s*:\s*titleInput\.value,\s*date\s*:\s*dateInput\.value\s*,\s*description\s*:\s*descriptionInput\.value\s*,?\s*\}\s*;?\s*if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\)\s*;?\s*\}\s*\}\s*;?/)
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
index a685897caa6..e08de6fa975 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fad9cd2eeb1e7ca2ca8c8b.md
@@ -14,13 +14,13 @@ Use arrow syntax to create an `updateTaskContainer` function. Then move the `tas
 You should use `const` and arrow syntax to create a `updateTaskContainer` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{/)
 ```
 
 You should move `taskData.forEach()` and its content into the `updateTaskContainer()` function.
 
 ```js
-assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\{\s*id,\s*title,\s*date,\s*description\s*\}\)\s*=>\s*{\s*\(tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\)\s*}\s*\);?\s*\};?/)
+assert.match(code, /const\s+updateTaskContainer\s*=\s*\(\s*\)\s*=>\s*\{\s*taskData\.forEach\(\s*\(\s*\{\s*id,\s*title,\s*date,\s*description\s*\}\s*\)\s*=>\s*{\s*\(\s*tasksContainer\.innerHTML\s*\+=\s*`\s*<div\s+class\s*=\s*('|")task\1\s*id\s*=\s*('|")\$\{id\}\2>\s*<p><strong>Title:<\/strong>\s*\$\{title\}<\/p>\s*<p><strong>Date:<\/strong>\s*\$\{date\}<\/p>\s*<p><strong>Description:<\/strong>\s*\$\{description\}<\/p>\s*<button\s+type\s*=\s*('|")button\3\s*class\s*=\s*('|")btn\4>Edit<\/button>\s*<button\s+type\s*=\s*('|")button\5\s*class\s*=\s*('|")btn\6>Delete<\/button>\s*<\/div>\s*`\s*\)\s*}\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
index 650ed1ccdfe..696192c8836 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadae4f2d51b7d5d8b98d8.md
@@ -14,13 +14,13 @@ Inside the `addOrUpdateTask` function, call the `updateTaskContainer` and `reset
 You should call the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\)\s*/)
+assert.match(code, /updateTaskContainer\(\s*\)\s*/)
 ```
 
 You should call the `reset` function after calling the `updateTaskContainer` function.
 
 ```js
-assert.match(code, /updateTaskContainer\(\);?\s*reset\(\);?\s*/)
+assert.match(code, /updateTaskContainer\(\s*\);?\s*reset\(\s*\);?\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
index 0dd6b211075..51922a8dade 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fadff23375f27ff06c6d40.md
@@ -14,7 +14,7 @@ Now remove the `reset()` call inside the `taskForm` submit event listener and ca
 You should remove `reset()` and call `addOrUpdateTask()`.
 
 ```js
-assert.match(code, /addOrUpdateTask\(\)/)
+assert.match(code, /addOrUpdateTask\(\s*\)/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
index 1d34bff03c0..420e8af2786 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fae068bcdc9c805bd8399e.md
@@ -13,16 +13,16 @@ To enable editing and deleting for each task, add an `onclick` attribute to both
 
 # --hints--
 
-You should add `onclick="editTask(this)"` as the first attribute of the edit button.
+You should add `onclick="editTask(this)"` to your edit button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")editTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3\s*>Edit<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')editTask\(\s*this\s*\)\1)[^>]*>Edit<\/button>/);
 ```
 
-You should add `onclick="deleteTask(this)"` as the first attribute of the delete button.
+You should add `onclick="deleteTask(this)"` to your delete button.
 
 ```js
-assert.match(code, /<button\s*onclick\s*=\s*('|")deleteTask\(\s*this\s*\)\1\s*type\s*=\s*('|")button\2\s*class\s*=\s*('|")btn\3>Delete<\/button>/)
+assert.match(code, /<button(?=[^>]*onclick\s*=\s*("|')deleteTask\(\s*this\s*\)\1)[^>]*>Delete<\/button>/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
index a1831798986..567e902b528 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf65b22ad8d07df9be14d.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable and set its value using the `findIndex()` metho
 You should not alter the `deleteTask` function.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+deleteTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+deleteTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.parentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
index 45b2570b1f8..3acdd6a00b1 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64faf874364ec308f875f636.md
@@ -30,7 +30,7 @@ Use the `remove()` method to remove the `parentElement` of the `buttonEl` from t
 You should use the `remove()` method to remove the parent element of `buttonEl`.
 
 ```js
-assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\);?/)
+assert.match(deleteTask.toString(), /buttonEl\.parentElement\.remove\(\s*\);?/)
 ```
 
 You should use `splice()` on the `taskData` array.
@@ -42,13 +42,13 @@ assert.match(deleteTask.toString(), /taskData\.splice\(/)
 The first argument of your `splice()` method should be `dataArrIndex`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex/)
 ```
 
 The second argument of your `splice()` method should be `1`.
 
 ```js
-assert.match(deleteTask.toString(), /taskData\.splice\(dataArrIndex,\s*1\);?/)
+assert.match(deleteTask.toString(), /taskData\.splice\(\s*dataArrIndex,\s*1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
index e3f505e12e9..81a2dc5e724 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb0fa0968f2b113b2d90e9.md
@@ -16,25 +16,25 @@ Create a `dataArrIndex` variable. For its value, utilize the `findIndex()` metho
 You should not alter the `editTask` function.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*/)
 ```
 
 You should use `const` to declare a `dataArrIndex` variable and set it to `taskData.findIndex()`.
 
 ```js
-assert.match(code, /const\s+editTask\s*=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
+assert.match(code, /const\s+editTask\s*=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(/)
 ```
 
 You should pass in `item` as the parameter of the `findIndex()` arrow function callback. Don't use curly braces.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)/)
 ```
 
 Your arrow function callback should check if `item.id === buttonEl.parentElement.id`.
 
 ```js
-assert.match(code, /const\s+editTask\s+=\s*\(buttonEl\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
+assert.match(code, /const\s+editTask\s+=\s*\(\s*buttonEl\s*\)\s*=>\s*\{\s*const\s+dataArrIndex\s*=\s*taskData\.findIndex\(\s*(\(\s*item\s*\)|item)\s*=>\s*(item\.id\s*===\s*buttonEl\.parentElement\.id|buttonEl\.partentElement\.id\s*===\s*item\.id)\s*\);?\s*\};?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
index 1a2b8e12212..21fed3720a8 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb1061ca838611ed6a7d6b.md
@@ -14,7 +14,7 @@ Use square bracket notation to retrieve the task to be edited from the `taskData
 You should assign `taskData[dataArrIndex]` to `currentTask`.
 
 ```js
-assert.match(code, /currentTask\s*=\s*taskData\[dataArrIndex\];?/)
+assert.match(code, /currentTask\s*=\s*taskData\s*\[\s*dataArrIndex\s*\]\s*;?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
index e9e90de039e..5daff8094d9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb154a7c48cd159924bb18.md
@@ -14,13 +14,13 @@ At this point, editing a task won't reflect when you submit the task. To make th
 Your `if` statement should have an `else` block.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*/)
 ```
 
 Your `else` block should have the code `taskData[dataArrIndex] = taskObj`.
 
 ```js
-assert.match(code, /if\s*\(dataArrIndex\s*===\s*-1\)\s*\{\s*taskData\.unshift\(taskObj\);?\s*\}\s*else\s*\{\s*taskData\[dataArrIndex\]\s*=\s*taskObj;?\s*\}/)
+assert.match(code, /if\s*\(\s*dataArrIndex\s*===\s*-1\s*\)\s*\{\s*taskData\.unshift\(\s*taskObj\s*\);?\s*\}\s*else\s*\{\s*taskData\s*\[\s*dataArrIndex\s*\]\s*=\s*taskObj;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
index 83fbef7cddd..5f649f9be8f 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fb29348a60361ccd45c1e2.md
@@ -26,13 +26,13 @@ After that, open your browser console and go to the `Applications` tab, select `
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 Your `localStorage.setItem()` should have a value of `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*myTaskArr\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*myTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
index cd186a18aeb..6f380e8f190 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64fefebad99209211ec30537.md
@@ -16,13 +16,13 @@ To resolve the issue, wrap the data you're saving in the `JSON.stringify()` meth
 Your `localStorage.setItem()` should have a key of `"data"`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1/)
 ```
 
 You should wrap `JSON.stringify()` around `myTaskArr`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(("|')data\1,\s*JSON\.stringify\(myTaskArr\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*("|')data\1,\s*JSON\.stringify\(\s*myTaskArr\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
index 7e2832ff7e0..d07fecf9884 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff0313700dad264d19dfe4.md
@@ -16,13 +16,13 @@ Use the `getItem()` method to retrieve the `myTaskArr` array and assign it to th
 You should use `const` to create a `getTaskArr` variable and assign `localStorage.getItem("data")` to it.
 
 ```js
-assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(('|")data\1\);?/)
+assert.match(code, /const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\1\s*\);?/)
 ```
 
 You should log the `getTaskArr` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArr\);?/)
+assert.match(code, /console\.log\(\s*getTaskArr\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
index 6726683e63a..61c813df7b0 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff04cc33779427a6412449.md
@@ -18,13 +18,13 @@ Check the console to see the difference between `getTaskArr` and `getTaskObj`.
 You should use `const` to create a `getTaskArrObj` variable and assign it to `JSON.parse(localStorage.getItem('data'));`.
 
 ```js
-assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\);?/)
+assert.match(code, /const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\);?/)
 ```
 
 You should log the `getTaskArrObj` variable to the console.
 
 ```js
-assert.match(code, /console\.log\(getTaskArrObj\);?/)
+assert.match(code, /console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
index 48dfd88ae49..0f286ea628e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff068e0426eb288874ed79.md
@@ -16,7 +16,7 @@ Remove the `data` item from local storage and open the console to observe the re
 You should use `localStorage.removeItem()` to remove the `data` item from the browser's local storage.
 
 ```js
-assert.match(code, /localStorage\.removeItem\(('|")data\1\);?/)
+assert.match(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
index 514094f28d6..69d62d8ac8b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff23daf176a92de95f24dc.md
@@ -16,13 +16,13 @@ Remove `localStorage.removeItem()` and use `localStorage.clear()` instead. You d
 You should remove `localStorage.removeItem("data")`.
 
 ```js
-assert.notMatch(code, /localStorage\.removeItem\(('|")data\1\);/)
+assert.notMatch(code, /localStorage\.removeItem\(\s*('|")data\1\s*\);/)
 ```
 
 You should remove everything from the browser `local storage` with `localStorage.clear()`.
 
 ```js
-assert.match(code, /localStorage\.clear\(\);?/)
+assert.match(code, /localStorage\.clear\(\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
index 597ce9e1b9c..2bbc447f1af 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/64ff24b80431f62ec6b93f65.md
@@ -14,7 +14,7 @@ Remove the `myTaskArr` array and all of the code for `localStorage` because you
 You should remove `myTaskArr` and all the code related to `localStorage` that you've just learned.
 
 ```js
-assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s"Walk\s*the\s*Dog",\s*date:\s*"22-04-2022"\s*\},\s*\{\s*task:\s"Read\s*some\s*books",\s*date:\s*"02-11-2023"\s*\},\s*\{\s*task:\s"Watch\s*football",\s*date:\s*"10-08-2021"\s*\},\s*\];?\s*localStorage\.setItem\("data", JSON\.stringify\(myTaskArr\)\);\s*localStorage\.clear\(\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\("data"\)\s*console\.log\(getTaskArr\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(localStorage\.getItem\("data"\)\);?\s*console\.log\(getTaskArrObj\);?/)
+assert.notMatch(code, /const\s+myTaskArr\s*=\s*\[\s*\{\s*task:\s('|")Walk\s*the\s*Dog\1,\s*date:\s*('|")22-04-2022\2\s*\},\s*\{\s*task:\s('|")Read\s*some\s*books\3,\s*date:\s*('|")02-11-2023\4\s*\},\s*\{\s*task:\s('|")Watch\s*football\5,\s*date:\s*('|")10-08-2021\6\s*\},\s*\]\s*;?\s*localStorage\.setItem\(('|")data\7, JSON\.stringify\(\s*myTaskArr\s*\)\s*\);\s*localStorage\.clear\(\s*\);?\s*const\s+getTaskArr\s*=\s*localStorage\.getItem\(\s*('|")data\8\s*\)\s*console\.log\(\s*getTaskArr\s*\)\s*const\s+getTaskArrObj\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\9\s*\)\s*\);?\s*console\.log\(\s*getTaskArrObj\s*\);?/)
 ```
 
 # --seed--
@@ -316,7 +316,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -346,7 +346,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
index 202d5f1d35a..de53e1a9f44 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65003986d17d1e1865b269c0.md
@@ -24,13 +24,13 @@ assert.match(code, /localStorage\.setItem\(/)
 You should pass in `"data"` as the first argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
-assert.match(code, /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(code, /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
index f9018ffba7d..85948e5fdce 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650046832f92c01a35834bca.md
@@ -24,14 +24,14 @@ You should pass in `"data"` as the first argument of your `localStorage.setItem(
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1/)
 ```
 
 You should pass in `JSON.stringify(taskData)` as the second argument of your `localStorage.setItem()`.
 
 ```js
 const splitter = code.split("taskData.splice(dataArrIndex, 1);")
-assert.match(splitter[1], /localStorage\.setItem\(('|")data\1,\s*JSON\.stringify\(taskData\)\);?/)
+assert.match(splitter[1], /localStorage\.setItem\(\s*('|")data\1,\s*JSON\.stringify\(\s*taskData\s*\)\s*\);?/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
index 8d9473d11e1..0dd4c630408 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650048b0764f9c1b798200e2.md
@@ -16,7 +16,7 @@ Set `taskData` to the retrieval of `data` from local storage **or** an empty arr
 You should set the `taskData` variable to `JSON.parse(localStorage.getItem("data")) || [];`.
 
 ```js
-assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(localStorage\.getItem\(('|")data\1\)\)\s*\|\|\s*\[\];?/)
+assert.match(code, /const\s+taskData\s*=\s*JSON\.parse\(\s*localStorage\.getItem\(\s*('|")data\1\s*\)\s*\)\s*\|\|\s*\[\s*\]\s*;?/)
 ```
 
 # --seed--
@@ -321,7 +321,7 @@ const updateTaskContainer = () => {
           <p><strong>Date:</strong> ${date}</p>
           <p><strong>Description:</strong> ${description}</p>
           <button onclick="editTask(this)" type="button" class="btn">Edit</button>
-          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button> 
+          <button onclick="deleteTask(this)" type="button" class="btn">Delete</button>
         </div>
       `)
     }
@@ -352,7 +352,7 @@ const editTask = (buttonEl) => {
 
   addOrUpdateTaskBtn.innerText = "Update Task";
 
-  taskForm.classList.toggle("hidden");  
+  taskForm.classList.toggle("hidden");
 }
 
 const reset = () => {
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
index e6165c0a45b..66376b9472b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/65004ba581d03d1d5628b41c.md
@@ -20,13 +20,13 @@ With that, you've completed this project.
 You should create an `if` statement with `(taskData.length)` as the condition. As a reminder, `0` is a falsy value.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*/)
 ```
 
 You should call the `updateTaskContainer` function in your `if` statement.
 
 ```js
-assert.match(code, /if\s*\(taskData\.length\)\s*\{\s*updateTaskContainer\(\);?\s*\}/)
+assert.match(code, /if\s*\(\s*taskData\.length\s*\)\s*\{\s*updateTaskContainer\(\s*\);?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
index 02a38450de0..61fbba8f423 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-localstorage-by-building-a-todo-app/650300a25b6f72964ab8aca6.md
@@ -20,7 +20,7 @@ console.log(Date.now()); // 1628586800000
 You should attach `-${Date.now()}` to the existing value of the `id` key. Don't forget it needs to be inside the template string.
 
 ```js
-assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\)\}`,?\s*\}/)
+assert.match(code, /const\s+taskObj\s*=\s*\{\s*id:\s*`\$\{titleInput\.value\.toLowerCase\(\s*\)\.split\(\s*('|")\s{1}\1\s*\)\.join\(\s*('|")-\2\s*\)\}-\$\{Date\.now\(\s*\)\}`,?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
index 050483b6059..f16d8a680a6 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e02a333354343b595d64ca.md
@@ -1,32 +1,18 @@
 ---
 id: 63e02a333354343b595d64ca
-title: Крок 16
+title: Step 15
 challengeType: 0
-dashedName: step-16
+dashedName: step-15
 ---
 
 # --description--
 
-Now that you have tested the `Object.freeze()` method, you can delete those two lines of code from the last lesson.
-
 The next step is to access the key called `sport` from the `myFavoriteFootballTeam` object and assign it to a new `const` variable called `sport`.
 
 Remember you can use dot notation for this.
 
 # --hints--
 
-You should remove your assignment of the `USA` string to `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /myFavoriteFootballTeam\.team\s*=\s*('|"|`)USA\1\s*/);
-```
-
-You should remove your `console.log` for `myFavoriteFootballTeam.team`.
-
-```js
-assert.notMatch(code, /console\.log\(\s*myFavoriteFootballTeam\.team\s*\)/);
-```
-
 Використайте `const`, щоб оголосити змінну `sport`.
 
 ```js
@@ -462,8 +448,6 @@ Object.freeze(myFavoriteFootballTeam);
 
 --fcc-editable-region--
 
-myFavoriteFootballTeam.team = "USA";
-console.log(myFavoriteFootballTeam.team);
 
 --fcc-editable-region--
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
index 43d886c3706..c05e0cf053e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e0334b7a24bd3c96aca4de.md
@@ -1,8 +1,8 @@
 ---
 id: 63e0334b7a24bd3c96aca4de
-title: Крок 17
+title: Step 16
 challengeType: 0
-dashedName: step-17
+dashedName: step-16
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
index 45d6550a552..e556c5c05e3 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e036373fc9173d284e165a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e036373fc9173d284e165a
-title: Крок 18
+title: Step 17
 challengeType: 0
-dashedName: step-18
+dashedName: step-17
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
index ece42d42a66..2a8ea3b0d0b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e03b86008bbb3e1c3de846.md
@@ -1,8 +1,8 @@
 ---
 id: 63e03b86008bbb3e1c3de846
-title: Крок 19
+title: Step 18
 challengeType: 0
-dashedName: step-19
+dashedName: step-18
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
index 93e6d3f6f7b..32ae955337d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e042661ad2663f0d468740.md
@@ -1,8 +1,8 @@
 ---
 id: 63e042661ad2663f0d468740
-title: Крок 20
+title: Step 19
 challengeType: 0
-dashedName: step-20
+dashedName: step-19
 ---
 
 # --description--
@@ -15,7 +15,7 @@ Use object destructuring to access the `coachName` value.
 
 ```js
 
-assert.match(code, /const\s*{\s*coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach\s*/)
+assert.match(code, /const\s*{\s*(coachName\s*}\s*=\s*myFavoriteFootballTeam\.headCoach|headCoach\s*:\s*{\s*coachName\s*}\s*}\s*=\s*myFavoriteFootballTeam)\s*;?/)
 
 ```
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
index 89b3e97420c..ed536a4b70e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e050bf935ac341b88326d6.md
@@ -1,8 +1,8 @@
 ---
 id: 63e050bf935ac341b88326d6
-title: Крок 21
+title: Step 20
 challengeType: 0
-dashedName: step-21
+dashedName: step-20
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
index 9c3e093d856..3562608e3f9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05557016dfd45ea49152c.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05557016dfd45ea49152c
-title: Крок 22
+title: Step 21
 challengeType: 0
-dashedName: step-22
+dashedName: step-21
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
index 399cc070d9c..70772e4cba9 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e05c00b615bb46ac87273a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e05c00b615bb46ac87273a
-title: Крок 23
+title: Step 22
 challengeType: 0
-dashedName: step-23
+dashedName: step-22
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
index 489594456a6..c5f67369004 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e060df21bca347b2d2b374.md
@@ -1,8 +1,8 @@
 ---
 id: 63e060df21bca347b2d2b374
-title: Крок 24
+title: Step 23
 challengeType: 0
-dashedName: step-24
+dashedName: step-23
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
index fefce590949..5ea194d88aa 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e062d6090ebb486a4eda3a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e062d6090ebb486a4eda3a
-title: Крок 25
+title: Step 24
 challengeType: 0
-dashedName: step-25
+dashedName: step-24
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
index 8abc9a710e2..5cd7ea1d6e4 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e949b8327aa2aca2ca8eac.md
@@ -1,8 +1,8 @@
 ---
 id: 63e949b8327aa2aca2ca8eac
-title: Крок 26
+title: Step 25
 challengeType: 0
-dashedName: step-26
+dashedName: step-25
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
index 21c209d869f..1fdbdeca88d 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e94dae6dcedbad73f2f6ee.md
@@ -1,8 +1,8 @@
 ---
 id: 63e94dae6dcedbad73f2f6ee
-title: Крок 27
+title: Step 26
 challengeType: 0
-dashedName: step-27
+dashedName: step-26
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
index 23435fe6b2b..dbeb80c7a4c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e954321b0a77ae4f6d9650.md
@@ -1,8 +1,8 @@
 ---
 id: 63e954321b0a77ae4f6d9650
-title: Крок 28
+title: Step 27
 challengeType: 0
-dashedName: step-28
+dashedName: step-27
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
index 7019680ab80..3912e0e6228 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95a45dce95baf41dd4f78.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95a45dce95baf41dd4f78
-title: Крок 29
+title: Step 28
 challengeType: 0
-dashedName: step-29
+dashedName: step-28
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
index a68d6130277..9503e3c792b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e95e39860dc5b01ebe9be0.md
@@ -1,8 +1,8 @@
 ---
 id: 63e95e39860dc5b01ebe9be0
-title: Крок 30
+title: Step 29
 challengeType: 0
-dashedName: step-30
+dashedName: step-29
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
index 831ac565593..e037852b3bc 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9667c881b61b1e338d276.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9667c881b61b1e338d276
-title: Крок 31
+title: Step 30
 challengeType: 0
-dashedName: step-31
+dashedName: step-30
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
index 04558bc3d66..20e68b6415e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96938d2a347b2734a1587.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96938d2a347b2734a1587
-title: Крок 32
+title: Step 31
 challengeType: 0
-dashedName: step-32
+dashedName: step-31
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
index 40188671ae3..eb225b3116c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e96eb94c97b6b31ee50f63.md
@@ -1,8 +1,8 @@
 ---
 id: 63e96eb94c97b6b31ee50f63
-title: Крок 33
+title: Step 32
 challengeType: 0
-dashedName: step-33
+dashedName: step-32
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
index 517326fce6b..401f8fcb289 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9718d7d490bb3940d5a0a.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9718d7d490bb3940d5a0a
-title: Крок 34
+title: Step 33
 challengeType: 0
-dashedName: step-34
+dashedName: step-33
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
index d43f65ad163..fa6337d49d5 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63e9737f686c76b4078a60f4.md
@@ -1,8 +1,8 @@
 ---
 id: 63e9737f686c76b4078a60f4
-title: Крок 35
+title: Step 34
 challengeType: 0
-dashedName: step-35
+dashedName: step-34
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
index fab7fcfb8e4..0544b4bdd11 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28972973504e7bb58b0b3.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28972973504e7bb58b0b3
-title: Крок 36
+title: Step 35
 challengeType: 0
-dashedName: step-36
+dashedName: step-35
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
index 58141481c53..251db3b9497 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f28ef082d771e8bf71f94a.md
@@ -1,8 +1,8 @@
 ---
 id: 63f28ef082d771e8bf71f94a
-title: Крок 37
+title: Step 36
 challengeType: 0
-dashedName: step-37
+dashedName: step-36
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
index bdbd601bcb5..ff1868e799e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f293c804d6f9e9a83ca4c5.md
@@ -1,8 +1,8 @@
 ---
 id: 63f293c804d6f9e9a83ca4c5
-title: Крок 38
+title: Step 37
 challengeType: 0
-dashedName: step-38
+dashedName: step-37
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Open the console, and make a selection from the teammates dropdown menu. You sho
 You should add a `console.log` with the value of `e.target.value`.
 
 ```js
-assert.match(code, /console\.log\s*\(e\.target\.value\)\s*/)
+assert.match(code, /console\.log\s*\(\s*e\.target\.value\s*\)\s*/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
index 192ed92bc3e..f95cf6e5d4b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29804e3ec00ea6fab1ec4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29804e3ec00ea6fab1ec4
-title: Крок 39
+title: Step 38
 challengeType: 0
-dashedName: step-39
+dashedName: step-38
 ---
 
 # --description--
@@ -18,7 +18,7 @@ Inside the callback function, access the `innerHTML` property of the `playerCard
 You should not have the `console.log` statement in your code.
 
 ```js
-assert.notMatch(code, /\s*console\.log\(e\.target\.value\)/);
+assert.notMatch(code, /\s*console\.log\(\s*e\.target\.value\s*\)/);
 ```
 
 You should access the `innerHTML` property of the `playerCards` element.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
index 1cab3c2967a..134d1331364 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f29ce62aea65eb041758c8.md
@@ -1,8 +1,8 @@
 ---
 id: 63f29ce62aea65eb041758c8
-title: Крок 40
+title: Step 39
 challengeType: 0
-dashedName: step-40
+dashedName: step-39
 ---
 
 # --description--
@@ -28,7 +28,7 @@ assert.match(code, /switch\s*\(\s*e\.target\.value\s*\)/);
 Your `switch` statement should be empty.
 
 ```js
-assert.match(code, /\s*switch\s*\(e\.target\.value\)\s*{\s*}/);
+assert.match(code, /\s*switch\s*\(\s*e\.target\.value\s*\)\s*{\s*}/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
index f88954dbc35..a3caf074b5c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a0a860790eebe61bf908.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a0a860790eebe61bf908
-title: Крок 41
+title: Step 40
 challengeType: 0
-dashedName: step-41
+dashedName: step-40
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
index dfaa57cd810..622807d94cf 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a4a8087e6dec8ec47f16.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a4a8087e6dec8ec47f16
-title: Крок 44
+title: Step 43
 challengeType: 0
-dashedName: step-44
+dashedName: step-43
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
index 5e151f6b44b..7f0eaf11d18 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a5f09a785aed155c0a56.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a5f09a785aed155c0a56
-title: Крок 45
+title: Step 44
 challengeType: 0
-dashedName: step-45
+dashedName: step-44
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
index 8ccc6131377..e0ad4bb1553 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2a8e14fb388edd3242527.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2a8e14fb388edd3242527
-title: Крок 46
+title: Step 45
 challengeType: 0
-dashedName: step-46
+dashedName: step-45
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
index 4fd0065521e..3cdc8a26560 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2aa36fcdc63ee4e18fc37.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2aa36fcdc63ee4e18fc37
-title: Крок 47
+title: Step 46
 challengeType: 0
-dashedName: step-47
+dashedName: step-46
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
index 64648e5b761..0a8281a8a1c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/63f2ab4f6c52c5eec6d68de4.md
@@ -1,8 +1,8 @@
 ---
 id: 63f2ab4f6c52c5eec6d68de4
-title: Крок 48
+title: Step 47
 challengeType: 0
-dashedName: step-48
+dashedName: step-47
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
index 4fdb15ca39e..074240dcdf5 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fc88d8fa7127f76e0324f.md
@@ -1,8 +1,8 @@
 ---
 id: 641fc88d8fa7127f76e0324f
-title: Крок 42
+title: Step 41
 challengeType: 0
-dashedName: step-42
+dashedName: step-41
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
index e9dc91111c0..11c8298ac82 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-modern-javascript-methods-by-building-football-team-cards/641fcfd468185384ac218b7d.md
@@ -1,8 +1,8 @@
 ---
 id: 641fcfd468185384ac218b7d
-title: Крок 43
+title: Step 42
 challengeType: 0
-dashedName: step-43
+dashedName: step-42
 ---
 
 # --description--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
index 67e28f2f425..417198b49f7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/644760f4fb15ce765baebb62.md
@@ -7,7 +7,7 @@ dashedName: step-14
 
 # --description--
 
-After alerting the user if the number input is empty of the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
+After alerting the user if the number input is empty or the value is not a number, you can use the `return` keyword to break out of this function early. This will prevent future code in this function from running.
 
 Add the `return` keyword after `alert()`.
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
index 768f1718f78..d0d0ec35907 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/645b6dad50514e69df601df6.md
@@ -24,7 +24,6 @@ Use the `.reverse()` method to reverse the order of the `remainders` array, and
 You should use the `.reverse()` method on the `remainders` array.
 
 ```js
-console.log(String(decimalToBinary))
 assert.match(String(decimalToBinary), /remainders\.reverse\(\s*\)/);
 ```
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
index 97441acddee..f44c50396eb 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6462060b0a8a2c15726649ec.md
@@ -31,7 +31,7 @@ assert.notMatch(String(decimalToBinary), /else\s+if\s*\([\s\S]+\)/);
 Your `decimalToBinary()` function should have an `if` statement that checks if `input` is equal to `0` or `1`.
 
 ```js
-assert.match(String(decimalToBinary), /if\s*\(input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
+assert.match(String(decimalToBinary), /if\s*\(\s*input\s*===?\s*0\s*\|\|\s*input\s*===?\s*1\s*\)|if\s*\(\s*input\s*===?\s*1\s*\|\|\s*input\s*===?\s*0\s*\)/);
 ```
 
 If input is equal to `0` or `1`, your `decimalToBinary()` function should return `String(input)`.
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
index b358ba0950a..0fa846893d2 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646bc0e5a60ea131e03f91.md
@@ -44,7 +44,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1000` as the second argument to the `setTimeout` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Code\s*\1\s*\);?\s*\}?,\s*1000\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
index 63869c4f0dc..50660e9f400 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64646db2c684b7a3a174a1d0.md
@@ -48,7 +48,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*free\s*\1\s*\);?\s*\}?,\s*500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
index 00636aa2097..7707a2097a6 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/646477c82475ffaf0c3c0771.md
@@ -46,7 +46,7 @@ assert.match(code, /setTimeout\(\s*\(\s*\)\s*=>\s*\{?\s*console\.log\(\s*('|"|`)
 You should pass `1500` as the second argument to the new `setTimeout()` function.
 
 ```js
-assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\)/);
+assert.match(code, /console\.log\(\s*('|"|`)\s*Camp\s*\1\s*\);?\s*\}?,\s*1500\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
index 7b4b1d869f2..6c740905e51 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649c6d77059edf80279a32.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the `id` attribute to the `inputVal`
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\.inputVal\s*\}\s*\1\s*>\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p\s+id\s*=\s*('|"|`)\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\3\s*\]\s*\}\2\s*>\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
index 1718e4c35a2..0bd475bffc7 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/64649f91446721e3ff391d88.md
@@ -16,7 +16,7 @@ You should use string interpolation to set the text of the paragraph element to
 ```js
 assert.match(
   code,
-  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
+  /animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\.inputVal\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`|animationContainer\.innerHTML\s*\+=\s*`\s*<p[\s\S]+>\s*decimalToBinary\s*\(\s*\$\{\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\}\s*\)\s*<\s*\/\s*p\s*>\s*`/
 );
 ```
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
index 05bbe96fcd9..977994840fe 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464abfb6cf778f3cb33d379.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `showMsgDelay` property of the c
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)showMsgDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.showMsgDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)showMsgDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
index 90f6fa43fdb..864931bb1e8 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464ad3c9b2e6cf58224cfa9.md
@@ -18,7 +18,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
index 297377c2fdb..223994c9b8b 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b1384318a5087190950a.md
@@ -27,7 +27,7 @@ You should set the `textContent` property of the targeted element equal to the `
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\[\s*('|"|`)\s*msg\s*\1\s*\]/
+  /setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\.msg|setTimeout\s*\([\s\S]+document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*textContent\s*=\s*obj\s*\[\s*('|"|`)\s*msg\s*\1\s*\]/
 );
 ```
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
index 8a1d8a2acbf..4c2d0ebc58a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b25851863b0a119eb7b1.md
@@ -36,7 +36,7 @@ The new `setTimeout()` function should have the `removeElDelay` property of the
 ```js
 assert.match(
   String(showAnimation),
-  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\[('|"|`)removeElDelay\1\]\s*\)/
+  /setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\.removeElDelay\s*\)|setTimeout\s*\(\s*function\s*\(\s*\)\s*{\s*}\s*,\s*obj\s*\[\s*('|"|`)removeElDelay\1\s*\]\s*\)/
 );
 ```
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
index 0ca9c151830..d222290241a 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464b3adeee9310bd37ff636.md
@@ -16,7 +16,7 @@ You should use the `.getElementById()` method to target the element where the `i
 ```js
 assert.lengthOf(
   String(showAnimation).match(
-    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
+    /document\.getElementById\s*\(\s*obj\.inputVal\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)/g
   ),
   2
 );
@@ -27,7 +27,7 @@ You should chain the `.remove()` method to the `.getElementById()` method.
 ```js
 assert.match(
   String(showAnimation),
-  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
+  /document\.getElementById\s*\(\s*obj\.inputVal\s*\)\s*\.\s*remove\s*\(\s*\)|document\.getElementById\s*\(\s*obj\s*\[\s*('|"|`)\s*inputVal\s*\1\s*\]\s*\)\s*\.\s*remove\s*\(\s*\)/g
 );
 ```
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
index 80aaefffca8..830d3b5c859 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-recursion-by-building-a-decimal-to-binary-converter/6464c6d6698a8027f8c9d6be.md
@@ -18,7 +18,7 @@ You should set the `textContent` property of `result` equal to calling `decimalT
 ```js
 assert.match(
   String(showAnimation),
-  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\[('|"|`)textContent\1\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
+  /result\.textContent\s*=\s*decimalToBinary\s*\(\s*5\s*\)|result\s*\[\s*('|"|`)textContent\1\s*\]\s*=\s*decimalToBinary\s*\(\s*5\s*\)/i
 );
 ```
 
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
index f595ffade2e..71d086afa64 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-regular-expressions-by-building-a-spam-filter/641cdf57c3f7ee276e1d9b32.md
@@ -9,9 +9,9 @@ dashedName: step-5
 
 Back in your event listener, you need to update the text of the `result` element.
 
-Use a ternary operator to update the text of the `result` element after the `if` statement. Check the truthiness of calling `isSpam()` on the value of the `messageInput` element. If true, set the text to `Oh no! This looks like a spam message.`. Otherwise, set the text to `This message does not seem to contain any spam.`
+After the `if` statement, use a ternary operator to check the truthiness of calling `isSpam()` with `messageInput.value` as the argument. If true, set the `textContent` property on the `result` element to `Oh no! This looks like a spam message.`. Otherwise, set it to `This message does not seem to contain any spam.`
 
-Then set the `messageInput` element's value to an empty string.
+Then set the `messageInput` element's `value` property to an empty string.
 
 # --hints--
 
@@ -21,10 +21,10 @@ You should use the assignment operator to set the `textContent` property of the
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*/)
 ```
 
-You should assign the `isSpam()` function call to `result.textContent`.
+You should call the `isSpam()` function after the assignment operator `=` and before the `?` ternary operator.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(.*\)\s*\?/)
 ```
 
 You should use ternary syntax to check the truthiness of `isSpam(messageInput.value)`.
@@ -45,10 +45,10 @@ The falsy expression of your ternary should set the `textContent` property of th
 assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*/);
 ```
 
-After your ternary, set the `value` of `messageInput` to an empty string.
+After your ternary, set the `value` property on the `messageInput` element to an empty string.
 
 ```js
-assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
+assert.match(code, /checkMessageButton\.addEventListener\(\s*('|"|`)click\1\s*,\s*\(\s*\)\s*=>\s*\{\s*if\s*\(\s*messageInput\.value\s*===\s*('|"|`)\2\s*\)\s*\{\s*alert\(\s*('|"|`)Please enter a message\.\3\s*\);?\s*return\s*;?\s*\}\s*result\.textContent\s*\=\s*isSpam\(\s*messageInput\.value\s*\)\s*\?\s*('|"|`)Oh no! This looks like a spam message.\4\s*:\s*('|"|`)This message does not seem to contain any spam.\5\s*;?\s*messageInput\.value\s*=\s*('|"|`)\6;?\s*\}/)
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
index 3183f8a3597..ed45e357a99 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65386e889dd615940cb3e042.md
@@ -24,13 +24,13 @@ assert.match(code, /const\s+currentDateParagraph\s+=/);
 Використайте `document.getElementById()`, щоб отримати елемент `#current-date`.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)current-date\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)current-date\1\s*\)/);
 ```
 
 Присвойте елемент `#current-date` до змінної `currentDateParagraph`.
 
 ```js
-assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(('|"|`)current-date\1\)/g));
+assert(code.match(/const\s+currentDateParagraph\s+=\s+document\.getElementById\(\s*('|"|`)current-date\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
index bc00c3ff800..99558571267 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653879d87bc55fa624280c77.md
@@ -20,13 +20,13 @@ assert.match(code, /const\s+dateOptionsSelectElement\s+=/);
 Використайте `document.getElementById()`, щоб отримати елемент `#date-options`.
 
 ```js
-assert.match(code, /document\.getElementById\(('|"|`)date-options\1\)/);
+assert.match(code, /document\.getElementById\(\s*('|"|`)date-options\1\s*\)/);
 ```
 
 Присвойте елемент `#date-options` до змінної `dateOptionsSelectElement`.
 
 ```js
-assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(('|"|`)date-options\1\)/g));
+assert(code.match(/const\s+dateOptionsSelectElement\s+=\s+document\.getElementById\(\s*('|"|`)date-options\1\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
index 42b6b250b1e..80d363d097c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65387b440b5cb1aa35585820.md
@@ -32,7 +32,7 @@ assert.match(code, /const\s+date\s+=/);
 Присвойте об’єкт `Date` до змінної `date` за допомогою `new Date()`.
 
 ```js
-assert(code.match(/const\s+date\s+=\s+new\s+Date\(\)/g));
+assert(code.match(/const\s+date\s+=\s+new\s+Date\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
index d3d0fef23ce..0c3b4e4f755 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538830e01ab66ade75b869e.md
@@ -30,7 +30,7 @@ assert.match(code, /const\s+day\s+=/);
 Присвойте `date.getDate()` до змінної `day`.
 
 ```js
-assert(code.match(/const\s+day\s+=\s+date\.getDate\(\)/g));
+assert(code.match(/const\s+day\s+=\s+date\.getDate\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
index cb8d87fb85f..7d97292fdaa 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653883da4a1fabaeb5f1f5e7.md
@@ -24,7 +24,7 @@ assert.match(code, /const\s+month\s+=/);
 Присвойте `date.getMonth() + 1` до змінної `month`.
 
 ```js
-assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\)\s*\+\s*1/g));
+assert(code.match(/const\s+month\s+=\s+date\.getMonth\(\s*\)\s*\+\s*1/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
index 063d678c418..f1b3297ba0c 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388475abfb4faf8dd5e347.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+year\s+=/);
 Присвойте `date.getFullYear()` до змінної `year`.
 
 ```js
-assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\)/g));
+assert(code.match(/const\s+year\s+=\s+date\.getFullYear\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
index 32af6b2e002..932c61d9915 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/653884e09dfb4eb01f1622ed.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+hours\s+=/);
 Присвойте `date.getHours()` до змінної `hours`.
 
 ```js
-assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\)/g));
+assert(code.match(/const\s+hours\s+=\s+date\.getHours\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
index e5f0d33a717..3414e113568 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538855514cb16b10204e712.md
@@ -22,7 +22,7 @@ assert.match(code, /const\s+minutes\s+=/);
 Присвойте `date.getMinutes()` до змінної `minutes`.
 
 ```js
-assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\)/g));
+assert(code.match(/const\s+minutes\s+=\s+date\.getMinutes\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
index 2b4e81c5f7d..ab8b8f750be 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/6538886c61a414b4e34496fe.md
@@ -16,7 +16,7 @@ dashedName: step-13
 Ви повинні мати рядок `console.log(formattedDate)` у коді.
 
 ```js
-assert.match(code, /console\.log\(formattedDate\)/);
+assert.match(code, /console\.log\(\s*formattedDate\s*\)/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
index af0a50c2e3d..b5f27b4c91e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388ac7154e44b72c74d616.md
@@ -22,7 +22,7 @@ assert(code.match(/currentDateParagraph\.textContent\s*=\s*formattedDate/g));
 Вам не потрібен рядок `console.log(formattedDate);` у коді.
 
 ```js
-assert.notMatch(code, /console\.log\(formattedDate\);/);
+assert.notMatch(code, /console\.log\(\s*formattedDate\s*\);/);
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
index 002c01e8753..db7c4337779 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65388bbcbf6928b83fc424d1.md
@@ -15,11 +15,17 @@ element.addEventListener("change", () => {
 });
 ```
 
-Сполучіть метод `addEventListener` до `dateOptionsSelectElement`, де першим аргументом є `change`, а другим — порожня стрілкова функція.
+Attach the `addEventListener` method to the `dateOptionsSelectElement`. The first argument of the event listener should be the string `change` and the second argument should be an empty arrow function.
 
 # --hints--
 
-Використайте метод `addEventListener`, щоб додати слухач подій `change` до `dateOptionsSelectElement`.
+You should attach the `addEventListener` method to the `dateOptionsSelectElement`.
+
+```js
+assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(/g));
+```
+
+Your event listener should listen for a `change` event.
 
 ```js
 assert(code.match(/dateOptionsSelectElement\.addEventListener\s*\(\s*('|")change\1/g));
diff --git a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
index 6d113ff57ff..2e8f3b1824e 100644
--- a/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
+++ b/curriculum/challenges/ukrainian/15-javascript-algorithms-and-data-structures-22/learn-the-date-object-by-building-a-date-formatter/65389306578c34be5c93bc35.md
@@ -22,7 +22,7 @@ console.log(array); // [5, 4, 3, 2, 1]
 Використайте метод `.reverse()`, щоб змінити порядок масиву, який поверне `.split()`.
 
 ```js
-assert(code.match(/\.reverse\(\)/g));
+assert(code.match(/\.reverse\(\s*\)/g));
 ```
 
 # --seed--
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-a.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-a.md
index fde1680c344..a9ea1512583 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-a.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-a.md
@@ -1,6 +1,6 @@
 ---
 id: 6571b2fccc1de61d7b4dd37f
-title: Introduction to Flexbox Question A
+title: Вступ до Flexbox. Запитання A
 challengeType: 15
 dashedName: introduction-flexbox-question-a
 ---
@@ -9,27 +9,27 @@ dashedName: introduction-flexbox-question-a
 
 ## Перш ніж почнемо
 
-Flexbox layouts can get a little complicated. In a previous lesson, you learned how to inspect and debug things using your browser’s developer tools. Those tools will be crucial for you in the following lessons. If something isn’t behaving the way you expect, inspecting it in the developer tools should be your first step every time.
+Макети Flexbox можуть бути складними. У попередньому уроці ви дізнались, як провести огляд та налаштування за допомогою інструментів розробника в браузері. Ці інструменти будуть надзвичайно важливими в наступних уроках. Якщо щось працює не так, як ви очікуєте, в першу чергу потрібно провести перевірку в інструментах розробника.
 
-Flexbox isn’t necessarily any more difficult than the other concepts that we’ve covered so far, but it does have a few more moving parts. It is going to be somewhat difficult to make use of any of the things you’re learning in these first lessons until you get to the end and can put it all together. As we go, do yourself a favor and <strong>play with all of the code examples.</strong>
+Flexbox не складніший за інші поняття, які ми вже розглянули, але в нього трохи більше складових. На перших уроках буде складно побачити суцільну картину, допоки ви не дійдете до кінця, де поєднаєте все вивчене. Під час проходження уроків бажано <strong>звертати увагу на приклади коду.</strong>
 
-You will almost definitely need to come back and reference these lessons (or a couple of the resources we share with you) when you get to the assignments at the end of the section, but if you take your time and experiment with all the code examples we provide, you’ll know better where to look when that time comes.
+Найімовірніше, вам доведеться повертатися і посилатися на ці уроки (або інші матеріали, які ми надаємо) під час виконання завдань в кінці розділу. Але якщо ви виділите час і експериментуватимете з усіма наданими прикладами коду, ви краще зрозумієте, що робити у певний момент.
 
 ## Пофлексимо
 
-Flexbox is a way to arrange items into rows or columns. These items will flex (i.e. grow or shrink) based on some simple rules that you can define. To get started, let’s look at a simple demonstration.
+Flexbox — це спосіб розташувати предмети в рядки та стовпці. Ці предмети будуть гнутись (тобто збільшуватись або зменшуватись) на основі певних простих правил, які можна визначити. Для початку розглянемо простий приклад.
 
 > Ми впровадили багато інтерактивних прикладів у цих уроках. Настав час поекспериментувати з ними, щоб запам’ятати всі поняття!
 
 <iframe allowfullscreen="true" allowpaymentrequest="true" allowtransparency="true"  frameborder="0" height="400" width="100%" name="cp_embed_1" scrolling="no" src="https://codepen.io/TheOdinProjectExamples/embed/QWgNxrp?height=400&amp;default-tab=html%2Cresult&amp;slug-hash=QWgNxrp&amp;editable=true&amp;user=TheOdinProjectExamples&amp;name=cp_embed_1" style="width: 100%; overflow:hidden; display:block;" title="Вставка CodePen" loading="lazy"></iframe>
 
-We’ll get into exactly what’s going on here soon enough. But for now, let’s uncomment the two flex related CSS declarations in the above Codepen by removing the `/*` and `*/` tags surrounding them, then check out the result.
+Незабаром розберемося, що тут відбувається. Наразі розкоментуємо два пов’язаних гнучкі оголошення CSS з Codepen вище, видаливши теги `/*` та `*/` навколо них, а потім глянемо на результат.
 
 > Коментарі заважають браузеру тлумачити рядки як код і використовуються між певними тегами. CSS використовує `/*` як початковий тег коментаря та `*/` як кінцевий тег коментаря, а HTML та JavaScript мають власний синтаксис. Прокоментовані рядки коду можна знову активувати, просто видаливши теги коментарів навколо коду.
 
-All 3 divs should now be arranged horizontally. If you resize the results frame with the `1x`, `.5x` and `.25x` buttons you’ll also see that the `div` elements will "flex". They will fill the available area and will each have equal width.
+Тепер всі три елементи div мають розташовуватись горизонтально. Якщо змінити їхній розмір за допомогою кнопок `1x`, `.5x` та `.25x`, ви побачите, як елементи `div` почнуть «гнутись». Вони заповнять доступну площу та матимуть однакову ширину.
 
-If you add another `div` to the HTML, inside of `.flex-container`, it will show up alongside the others, and everything will flex to fit within the available area.
+Якщо до HTML всередині `.flex-container` додати ще один `div`, він з’явиться поруч з іншими елементами та все погнеться, щоб поміститись в межах доступної площі.
 
 > Якщо важко побачити зміни в невеликому вбудованому CodePen, натисніть на кнопку «Edit on CodePen» або «Fork on CodePen». Це покаже приклад у повноекранному середовищі. Це особливо знадобиться для деяких наступних прикладів.
 
@@ -37,23 +37,23 @@ If you add another `div` to the HTML, inside of `.flex-container`, it will show
 
 ## --text--
 
-What happens when the two flex related CSS declarations in the CodePen are uncommented?
+Що відбудеться, якщо розкоментувати два пов’язаних гнучкі оголошення CSS в CodePen?
 
 ## --answers--
 
-The `div` elements become hidden from view, losing their visibility within the container.
+Елементи `div` стануть прихованими, втративши видимість всередині контейнера.
 
 ---
 
-All 3 `div` elements are arranged horizontally, and they flex to fill the available area with equal width.
+Усі три елементи `div` розташуються горизонтально і розтягнуться, щоб заповнити доступну площу однаковою шириною.
 
 ---
 
-Each `div` element enlarges and covers the entire container, overlapping each other.
+Усі елементи `div` збільшаться і покриють весь контейнер, перекривши один одного.
 
 ---
 
-The `div` elements align vertically in a single column, ignoring the flex-related CSS declarations.
+Елементи `div` вирівняються вертикально в один стовпець, ігноруючи оголошення CSS.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-b.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-b.md
index e0a91b54e4a..37a949e37f7 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-b.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-b.md
@@ -1,15 +1,15 @@
 ---
 id: 6571b2fecc1de61d7b4dd380
-title: Introduction to Flexbox Question B
+title: Вступ до Flexbox. Запитання B
 challengeType: 15
 dashedName: introduction-flexbox-question-b
 ---
 
 # --description--
 
-As you’ve seen, flexbox is not just a single CSS property but a whole toolbox of properties that you can use to put things where you need them. Some of these properties belong on the flex container, while some go on the flex items. This is a simple yet important concept.
+Як ви вже помітили, flexbox — це не просто властивість CSS, а цілий набір властивостей, які можна використовувати, щоб розмістити елементи так, як потрібно. Деякі з цих властивостей належать до гнучкого контейнера, а деякі — до гнучких предметів. Це просте, але важливе поняття.
 
-A flex container is any element that has `display: flex` on it. A flex item is any element that lives directly inside of a flex container.
+Гнучкий контейнер — це будь-який елемент, який має `display: flex`. Гнучкий предмет — це будь-який елемент, який живе в гнучкому контейнері.
 
 <img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/8c0402439e1b0a9a156731bdab4ea64162688dab/foundations/html_css/flexbox/imgs/03.png" />
 
@@ -17,23 +17,23 @@ A flex container is any element that has `display: flex` on it. A flex item is a
 
 ## --text--
 
-What’s the difference between a flex container and a flex item?
+Яка різниця між гнучким контейнером та гнучким предметом?
 
 ## --answers--
 
-Flex containers are elements with `display: flex`, while flex items are elements within flex containers.
+Гнучкі контейнери — це елементи з `display: flex`, а гнучкі предмети — це елементи в межах гнучких контейнерів.
 
 ---
 
-Flex containers are elements within flex items, while flex items define the overall layout.
+Гнучкі контейнери — це елементи в межах гнучких предметів, а гнучкі предмети визначають загальний макет.
 
 ---
 
-Flex containers are elements using flexbox, and flex items are inline elements.
+Гнучкі контейнери — це елементи, які використовують flexbox, а гнучкі предмети є рядковими елементами.
 
 ---
 
-Flex containers are elements that define the layout structure, while flex items control the overall page design.
+Гнучкі контейнери — це елементи, які визначають структуру макета, а гнучкі предмети контролюють загальний дизайн сторінки.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-c.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-c.md
index 7e3b2d5d946..cdf20f24fbb 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-c.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-c.md
@@ -1,17 +1,17 @@
 ---
 id: 6571b2fecc1de61d7b4dd381
-title: Introduction to Flexbox Question C
+title: Вступ до Flexbox. Запитання C
 challengeType: 15
 dashedName: introduction-flexbox-question-c
 ---
 
 # --description--
 
-Somewhat confusingly, any element can be both a flex container and a flex item. Said another way, you can also put `display: flex` on a flex item and then use flexbox to arrange its children.
+Як не дивно, будь-який елемент може бути і гнучким контейнером, і гнучким предметом. Іншими словами, ви можете додати `display: flex` до гнучкого предмета, а потім використати flexbox, щоб розташувати його дочірні елементи.
 
 <img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/495704c6eb6bf33bc927534f231533a82b27b2ac/html_css/v2/foundations/flexbox/imgs/04.png" />
 
-Creating and nesting multiple flex containers and items is the primary way you will be building up complex layouts. The following image was achieved using only flexbox to arrange, size, and place the various elements. Flexbox is a very powerful tool.
+Створення та вкладання декількох гнучких контейнерів та предметів — це основний спосіб, яким ви будете створювати складні макети. Зображення нижче було створено виключно за допомогою flexbox, щоб розмістити, змінити розмір та розташувати різні елементи. Flexbox — це дуже потужний інструмент.
 
 <img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/495704c6eb6bf33bc927534f231533a82b27b2ac/html_css/v2/foundations/flexbox/imgs/05.png" />
 
@@ -20,7 +20,7 @@ Creating and nesting multiple flex containers and items is the primary way you w
 
 ## --text--
 
-Which CSS property is applied to elements to make them flex containers?
+Яка властивість CSS застосовується до елементів, щоб зробити їх гнучкими контейнерами?
 
 ## --answers--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-d.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-d.md
index d3029431781..5752f1e2bd6 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-d.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-d.md
@@ -1,35 +1,35 @@
 ---
 id: 6571b2ffcc1de61d7b4dd382
-title: Introduction to Flexbox Question D
+title: Вступ до Flexbox. Запитання D
 challengeType: 15
 dashedName: introduction-flexbox-question-d
 ---
 
 # --description--
 
-Now that you have a basic understanding of how flexbox works, what is the primairy role of a flex item in a `flexbox` layout? Try and answer the question below.
+У вас є базове розуміння того, як працює flexbox. Яка головна роль гнучких предметів в макеті `flexbox`? Спробуйте відповісти на запитання нижче.
 
 # --question--
 
 ## --text--
 
-What role does a flex item play within a flex container?
+Яку роль відіграють гнучкі предмети в гнучкому контейнері?
 
 ## --answers--
 
-Flex items define the overall layout structure.
+Гнучкі предмети визначають загальну структуру макета.
 
 ---
 
-Flex items set the background colors of flex containers.
+Гнучкі предмети встановлюють колір фону гнучких контейнерів.
 
 ---
 
-Flex items allow the flex container to resize based on content.
+Гнучкі предмети дозволяють гнучким контейнерам змінити розмір на основі вмісту.
 
 ---
 
-Flex items are elements that reside directly within a flex container.
+Гнучкі предмети — це елементи, які живуть в гнучкому контейнері.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-e.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-e.md
index 2d214304d81..ddb34715f56 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-e.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-e.md
@@ -1,45 +1,45 @@
 ---
 id: 6571b300cc1de61d7b4dd383
-title: Introduction to Flexbox Question E
+title: Вступ до Flexbox. Запитання E
 challengeType: 15
 dashedName: introduction-flexbox-question-e
 ---
 
 # --description--
 
-The `flex` declaration is actually a shorthand for 3 properties that you can set on a flex item. These properties affect how flex items size themselves within their container. You've seen some shorthand properties before, but you haven't officially defined them yet.
+Насправді оголошення `flex` є скороченням трьох властивостей, які можна встановити в гнучкому предметі. Ці властивості впливають на те, як гнучкі предмети розміщуються в контейнерах самостійно. Раніше ви вже бачили скорочені властивості, але ми не представляли їх офіційно.
 
-> Shorthand properties are CSS properties that let you set the values of multiple other CSS properties simultaneously. Using a shorthand property, you can write more concise (and often more readable) stylesheets, saving time and energy.
+> Скорочені властивості — це властивості, які дозволяють одночасно встановити значення декількох інших властивостей CSS. За допомогою скорочених властивостей можна писати стисліші (та читабельніші) таблиці стилів, що зберігає час та енергію.
 
-In this case, `flex` is actually a shorthand for `flex-grow`, `flex-shrink` and `flex-basis`.
+У цьому випадку `flex` є скороченням властивостей `flex-grow`, `flex-shrink` та `flex-basis`.
 
-<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/0cc6b26bb0c4b94524369d327c97a8fb11e83b6b/foundations/html_css/flexbox/imgs/10.png" alt="flex shorthand" />
+<img src="https://cdn.statically.io/gh/TheOdinProject/curriculum/0cc6b26bb0c4b94524369d327c97a8fb11e83b6b/foundations/html_css/flexbox/imgs/10.png" alt="скорочення flex" />
 
-In the above screenshot, `flex: 1` equates to: `flex-grow: 1`, `flex-shrink: 1`, `flex-basis: 0`.
+`flex: 1` зі знімка екрана вище дорівнює `flex-grow: 1`, `flex-shrink: 1`, `flex-basis: 0`.
 
-Very often, you see the flex shorthand defined with only one value. In that case, that value is applied to `flex-grow`. So when you put `flex: 1` on our divs, you were actually specifying a shorthand of `flex: 1 1 0`.
+Дуже часто можна побачити, що скорочення визначене лише одним значенням. У такому випадку це значення застосоване до `flex-grow`. Тому, якщо ви додаєте `flex: 1` до елементів div, насправді ви вказуєте скорочення `flex: 1 1 0`.
 
 # --question--
 
 ## --text--
 
-Which properties are set by the `flex` shorthand?
+Які властивості задані скороченням `flex`?
 
 ## --answers--
 
-`flex-grow`, `flex-shrink`, and `flex`
+`flex-grow`, `flex-shrink` та `flex`
 
 ---
 
-`flex-basis`, `flex-wrap`, and `flex-direction`
+`flex-basis`, `flex-wrap` та `flex-direction`
 
 ---
 
-`flex-grow`, `flex-shrink`, and `flex-basis`
+`flex-grow`, `flex-shrink` та `flex-basis`
 
 ---
 
-`flex-direction`, `flex`, and `flex-wrap`
+`flex-direction`, `flex` та `flex-wrap`
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-f.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-f.md
index df65af8c2e8..b1eb9adb622 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-f.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-introduction-to-flexbox/introduction-flexbox-question-f.md
@@ -1,15 +1,15 @@
 ---
 id: 6571b300cc1de61d7b4dd384
-title: Introduction to Flexbox Question F
+title: Вступ до Flexbox. Запитання F
 challengeType: 15
 dashedName: introduction-flexbox-question-f
 ---
 
 # --description--
 
-`flex-grow` expects a single number as its value, and that number is used as the flex-item's "growth factor". When you applied `flex: 1` to every div inside our container, you were telling every div to grow the same amount. The result of this is that every div ends up the exact same size. If you instead add `flex: 2` to just one of the divs, then that div would grow to 2x the size of the others.
+`flex-grow` очікує число як значення, і це число використовується як «фактор росту» гнучкого предмета. Коли ви застосували `flex: 1` до кожного елемента div в контейнері, ви повідомили всім елементам div зростати однаково. В результаті всі елементи div мають однаковий розмір. А якщо додати `flex: 2` лише до одного елемента div, він буде в два рази більшим за інших.
 
-In the following example the `flex` shorthand has values for `flex-shrink` and `flex-basis` specified with their default values.
+У наступному прикладі скорочення `flex` має значення для `flex-shrink` та `flex-basis`, вказані за замовчуванням.
 
 <iframe allowfullscreen="true" allowpaymentrequest="true" allowtransparency="true" class="cp_embed_iframe " frameborder="0" height="300" width="100%" name="cp_embed_1" scrolling="no" src="https://codepen.io/TheOdinProjectExamples/embed/YzQqvgK?height=300&amp;default-tab=html%2Cresult&amp;slug-hash=YzQqvgK&amp;editable=true&amp;user=TheOdinProjectExamples&amp;name=cp_embed_1" style="width: 100%; overflow:hidden; display:block;" title="CodePen Embed" loading="lazy" id="cp_embed_YzQqvgK"></iframe>
 
@@ -17,23 +17,23 @@ In the following example the `flex` shorthand has values for `flex-shrink` and `
 
 ## --text--
 
-What does setting `flex: 2` to one specific div inside a flex container, while other divs have `flex: 1`, imply?
+Що відбудеться, якщо встановити `flex: 2` до одного певного елемента div в гнучкому контейнері, коли всі інші елементи div мають `flex: 1`?
 
 ## --answers--
 
-The container will shrink to accommodate the larger div.
+Контейнер зменшиться, щоб вмістити більший елемент div.
 
 ---
 
-All divs will retain the same size due to conflicting `flex` values.
+Елементи не змінять розмір через конфліктуючі значення `flex`.
 
 ---
 
-The specific div will grow to be twice the size of the others.
+Певний елемент div стане вдвічі більшим за інші елементи.
 
 ---
 
-All divs will shrink equally to adjust to the new `flex` values.
+Всі елементи div зменшаться, щоб відповідати новим розмірам `flex`.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-a.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-a.md
index ee8f5c7379c..2c9544d32b8 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-a.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-a.md
@@ -1,27 +1,27 @@
 ---
 id: 6570447ce7b02272663824df
-title: Learn Block and Inline Question A
+title: Блокові та рядкові елементи. Запитання A
 challengeType: 15
 dashedName: learn-block-and-inline-question-a
 ---
 
 # --description--
 
-Most of the elements that you have learned about so far are block elements. In other words, their default style is `display: block`. By default, block elements will appear on the page stacked atop each other, each new element starting on a new line.
+Більшість елементів, про які ви вже дізнались, є блоковими елементами. Іншими словами, їхнім стилем за замовчуванням є `display: block`. За замовчуванням блокові елементи з’являються на сторінці один на одному, а кожен новий елемент починається з нового рядка.
 
 # --question--
 
 ## --text--
 
-Which of the following statements about block elements is true?
+Яке з тверджень про блокові елементи є правильним?
 
 ## --answers--
 
-Block elements take up only the space necessary for their content.
+Блокові елементи займають лише місце, необхідне для свого вмісту.
 
 ---
 
-Block elements start on a new line and take up the full width available.
+Блокові елементи починаються з нового рядка та займають всю доступну ширину.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-b.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-b.md
index 5db2fee526d..01b4880b234 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-b.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-b.md
@@ -1,39 +1,39 @@
 ---
 id: 6570447de7b02272663824e0
-title: Learn Block and Inline Question B
+title: Блокові та рядкові елементи. Запитання B
 challengeType: 15
 dashedName: learn-block-and-inline-question-b
 ---
 
 # --description--
 
-Inline elements, however, do not start on a new line. They appear in line with whatever elements they are placed beside. A clear example of an inline element is a link, or `<a>` tag. If you stick one of these in the middle of a paragraph of text, it will behave like a part of the paragraph. <a  href="https://www.freecodecamp.org/" target="_blank">(Like this)</a> The link’s text will sit alongside other words in that paragraph. Additionally, padding and margin behave differently on inline elements. In general, you do not want to try to put extra padding or margin on inline elements.
+А ось рядкові елементи не починаються з нового рядка. Вони з’являються в рядку з будь-якими елементами, біля яких їх розташували. Хорошим прикладом рядкового елемента є посилання, або тег `<a>`. Якщо розмістити один з таких елементів всередині абзацу тексту, то він поводитиметься як частина абзацу. <a  href="https://www.freecodecamp.org/" target="_blank">(Ось так)</a> Текст посилання знаходитиметься між іншими словами абзацу. До того ж відступ та поле рядкових елементів поводяться по-іншому. Загалом, не намагайтесь надати додатковий відступ або поле до рядкових елементів.
 
 # --question--
 
 ## --assignment--
 
-Search the web for a list of `block` elements and a list of `inline` elements.
+Знайдіть в інтернеті список блокових (`block`) та рядкових (`inline`) елементів.
 
 ## --text--
 
-What is the difference between a `block` element and an `inline` element?
+Яка різниця між блоковими (`block`) та рядковими (`inline`) елементами?
 
 ## --answers--
 
-`block` elements are displayed without line breaks, while `inline` elements are displayed with line breaks.
+Блокові (`block`) елементи відтворюються без розірваних рядків, а рядкові (`inline`) елементи відтворюються з розірваними рядками.
 
 ---
 
-`block` elements take up the full width available, while `inline` elements only take up the space necessary for their content.
+Блокові (`block`) елементи займають всю доступну ширину, а рядкові (`inline`) елементи займають місце, необхідне для свого вмісту.
 
 ---
 
-`block` elements are always positioned horizontally, while `inline` elements are positioned vertically.
+Блокові (`block`) елементи завжди розташовані горизонтально, а рядкові (`inline`) елементи розташовані вертикально.
 
 ---
 
-`block` elements are used for small sections of text, while `inline` elements are used for larger chunks of content.
+Блокові (`block`) елементи використовують для малих розділів тексту, а рядкові (`inline`) елементи використовують для великих частин вмісту.
 
 
 ## --video-solution--
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-c.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-c.md
index deb5802961f..c2ae4819474 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-c.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-c.md
@@ -1,35 +1,35 @@
 ---
 id: 6570447ee7b02272663824e1
-title: Learn Block and Inline Question C
+title: Блокові та рядкові елементи. Запитання C
 challengeType: 15
 dashedName: learn-block-and-inline-question-c
 ---
 
 # --description--
 
-Padding is used to create space around an element's content, inside of any defined borders. With inline elements, padding adds space to the left, right, top, and bottom of the content. However, it's important to note that while padding does affect the space around the content, it does not affect the layout of other elements around the inline element. This means that horizontal padding (left and right) is respected, but vertical padding (top and bottom) does not cause other elements to move away.
+Відступ використовують, щоб створити місце навколо вмісту елемента всередині будь-яких визначених кордонів. Відступ в рядкових елементах додає місце зліва, справа, зверху та знизу вмісту. Однак важливо зазначити, що відступ впливає на місце навколо вмісту, але не впливає на макет інших елементів навколо рядкового елемента. Тобто це впливає на горизонтальний відступ (зліва та справа), а вертикальний відступ (зверху та знизу) не змушує інші елементи віддалятись.
 
 # --question--
 
 ## --text--
 
-How does `padding` affect `inline` elements?
+Як відступ (`padding`) впливає на рядкові (`inline`) елементи?
 
 ## --answers--
 
-Padding has no effect on `inline` elements.
+Відступ не впливає на рядкові (`inline`) елементи.
 
 ---
 
-Padding increases the width and height of `inline` elements.
+Відступ збільшує ширину та висоту рядкових (`inline`) елементів.
 
 ---
 
-Padding only affects the horizontal spacing of `inline` elements.
+Відступ впливає лише на горизонтальний інтервал рядкових (`inline`) елементів.
 
 ---
 
-Padding only affects the vertical spacing of `inline` elements.
+Відступ впливає лише на вертикальний інтервал рядкових (`inline`) елементів.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-d.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-d.md
index 10a4c301da6..342c5d390bf 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-d.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-d.md
@@ -1,35 +1,35 @@
 ---
 id: 6570447ee7b02272663824e2
-title: Learn Block and Inline Question D
+title: Блокові та рядкові елементи. Запитання D
 challengeType: 15
 dashedName: learn-block-and-inline-question-d
 ---
 
 # --description--
 
-Now that you have a basic understanding on how adding width and height to `inline` elements works, what happens when you add a top margin to an `inline` element?
+Тепер у вас є базове розуміння того, як додати ширину та висоту до рядкових (`inline`) елементів. Що ж відбудеться, якщо додати верхнє поле до рядкового (`inline`) елемента?
 
 # --question--
 
 ## --text--
 
-How does `margin-top` affect `inline` elements?
+Як `margin-top` впливає на рядкові (`inline`) елементи?
 
 ## --answers--
 
-`margin-top` has no impact on the layout of `inline` elements
+`margin-top` не впливає на макет рядкових (`inline`) елементів
 
 ---
 
-`margin-top` increases the height of `inline` elements.
+`margin-top` збільшує висоту рядкових (`inline`) елементів.
 
 ---
 
-`margin-top` adds space above the `inline` element.
+`margin-top` додає місце зверху рядкових (`inline`) елементів.
 
 ---
 
-`margin-top` only affects the horizontal spacing of `inline` elements.
+`margin-top` впливає лише на горизонтальний інтервал рядкових (`inline`) елементів.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-e.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-e.md
index 98c822a5bdf..a8dbb07db7b 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-e.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-e.md
@@ -1,35 +1,35 @@
 ---
 id: 6570447fe7b02272663824e3
-title: Learn Block and Inline Question E
+title: Блокові та рядкові елементи. Запитання E
 challengeType: 15
 dashedName: learn-block-and-inline-question-e
 ---
 
 # --description--
 
-Inline-block elements behave like inline elements, but with block-style padding and margin. `display: inline-block` is a useful tool to know about, but in practice, you'll probably end up reaching for flexbox more often if you're trying to line up a bunch of boxes. Flexbox will be covered in-depth in the next lesson.
+Рядково-блокові елементи поводяться як рядкові елементи, але мають відступ та поле блокових елементів. Про `display: inline-block` корисно знати, однак на практиці, швидше за все, ви частіше послуговуватиметесь flexbox, якщо намагатиметесь вирівняти декілька блоків. У наступному уроці детальніше розглянемо flexbox.
 
 # --question--
 
 ## --text--
 
-What is the difference between an `inline` element and an `inline-block` element?
+Яка різниця між рядковими (`inline`) та рядково-блоковими (`inline-block`) елементами?
 
 ## --answers--
 
-`inline` elements are displayed without line breaks, while `inline-block` elements are displayed with line breaks.
+Рядкові (`inline`) елементи відтворюються без розірваних рядків, а рядково-блокові (`inline-block`) елементи відтворюються з розірваними рядками.
 
 ---
 
-`inline` elements do not allow setting width and height, while `inline-block` elements allow setting width and height.
+Рядкові (`inline`) елементи не дозволяють налаштувати ширину та висоту, а рядково-блокові (`inline-block`) елементи дозволяють налаштувати ширину та висоту.
 
 ---
 
-`inline` elements are always positioned horizontally, while `inline-block` elements are positioned vertically.
+Рядкові (`inline`) елементи завжди розташовані горизонтально, а рядково-блокові (`inline-block`) елементи розташовані вертикально.
 
 ---
 
-`inline` elements can contain block-level elements, while `inline-block` elements cannot contain other elements.
+Рядкові (`inline`) елементи можуть містити блокові елементи, а рядково-блокові (`inline-block`) елементи не можуть містити інших елементів.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-f.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-f.md
index d7a5e8c4b3e..570c2ee2f06 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-f.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-f.md
@@ -1,35 +1,35 @@
 ---
 id: 65704480e7b02272663824e4
-title: Learn Block and Inline Question F
+title: Блокові та рядкові елементи. Запитання F
 challengeType: 15
 dashedName: learn-block-and-inline-question-f
 ---
 
 # --description--
 
-The concept of “Normal flow” is implied in the box-model resources, but isn’t laid out very specifically. Read <a href="https://developer.mozilla.org/en-US/docs/Learn/CSS/CSS_layout/Normal_Flow" target="_blank">Normal Flow</a> from MDN to make sure you understand how elements lay themselves out by default.
+Поняття «нормального потоку» (англ. Normal flow) використовується в матеріалах блокової моделі, однак не викладене конкретно. Див. <a href="https://developer.mozilla.org/en-US/docs/Learn/CSS/CSS_layout/Normal_Flow" target="_blank">Normal Flow</a> від MDN, щоб підтвердити своє розуміння того, як елементи розташовуються за замовчуванням.
 
 # --question--
 
 ## --text--
 
-What is the "Normal flow" in CSS layouts?
+Що таке «нормальний потік» в макетах CSS?
 
 ## --answers--
 
-Normal flow refers to the process of animating elements in a CSS layout.
+Нормальний потік стосується процесу анімації елементів на макеті CSS.
 
 ---
 
-Normal flow is a CSS property used to control the visibility of elements in a layout.
+Нормальний потік — це властивість CSS, яку використовують для контролю видимості елементів на макеті.
 
 ---
 
-Normal flow is a CSS rule that defines the order of media queries for responsive design.
+Нормальний потік — це правило CSS, яке визначає порядок медіазапитів для адаптивного дизайну.
 
 ---
 
-Normal flow in CSS layouts refers to the default positioning of elements on a webpage.
+Нормальний потік в макетах CSS стосується розташування елементів на вебсторінці за замовчуванням.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-g.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-g.md
index 6ca6880e303..ae9fa01fb7d 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-g.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-g.md
@@ -1,27 +1,27 @@
 ---
 id: 65704482e7b02272663824e5
-title: Learn Block and Inline Question G
+title: Блокові та рядкові елементи. Запитання G
 challengeType: 15
 dashedName: learn-block-and-inline-question-g
 ---
 
 # --description--
 
-Now that you have some basic understanding of `block` and inline `elements`, pull up your list of `block` and `inline` elements from a couple questions ago and see if you can identify which of the following elements are `block` elements and which are `inline` elements.
+Тепер у вас є базове розуміння блокових (`block`) та рядкових (`inline`) елементів. Поверніться до списку блокових (`block`) та рядкових (`inline`) елементів з попереднього завдання та переконайтесь, чи зможете ідентифікувати блокові (`block`) та рядкові (`inline`) елементи.
 
 # --question--
 
 ## --text--
 
-Which of the following is NOT an `inline` element?
+Що з переліченого НЕ є рядковим (`inline`) елементом?
 
 ## --answers--
 
-form element
+Елемент form
 
 ---
 
-anchor element
+Елемент anchor
 
 ---
 
@@ -29,7 +29,7 @@ anchor element
 
 ---
 
-span element
+Елемент span
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-h.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-h.md
index 6489645ac41..f2c026004fa 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-h.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-h.md
@@ -1,35 +1,35 @@
 ---
 id: 65704483e7b02272663824e6
-title: Learn Block and Inline Question H
+title: Блокові та рядкові елементи. Запитання H
 challengeType: 15
 dashedName: learn-block-and-inline-question-h
 ---
 
 # --description--
 
-Now that you have some basic understanding of `block` and inline elements, pull up your list of `block` and `inline` elements from a couple questions ago and see if you can identify which of the following elements are `block` elements and which are `inline` elements.
+Тепер у вас є базове розуміння блокових (`block`) та рядкових (`inline`) елементів. Поверніться до списку блокових (`block`) та рядкових (`inline`) елементів з попереднього завдання та переконайтесь, чи зможете ідентифікувати блокові (`block`) та рядкові (`inline`) елементи.
 
 # --question--
 
 ## --text--
 
-Which of the following is NOT a `block` level element?
+Що з переліченого НЕ є блоковим (`block`) елементом?
 
 ## --answers--
 
-paragraph element
+Елемент paragraph
 
 ---
 
-image element
+Елемент image
 
 ---
 
-unordered list element
+Елемент unordered list
 
 ---
 
-footer element
+Елемент footer
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-i.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-i.md
index 4b058d62b18..79c2a30a57d 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-i.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-i.md
@@ -1,31 +1,31 @@
 ---
 id: 65704484e7b02272663824e7
-title: Learn Block and Inline Question I
+title: Блокові та рядкові елементи. Запитання I
 challengeType: 15
 dashedName: learn-block-and-inline-question-i
 ---
 
 # --description--
 
-You can't talk about `block` and `inline` elements without discussing `div`s and `span`s. All the other HTML elements you have encountered so far give meaning to their content. For example, paragraph elements tell the browser to display the text it contains as a paragraph. Strong elements tell the browser which texts within are important and so on. Yet, `div`s and `span`s give no particular meaning to their content. They are just generic boxes that can contain anything.
+Про блокові (`block`) та рядкові (`inline`) елементи неможливо говорити, не згадавши елементи `div` та `span`. Всі інші елементи HTML, з якими ви стикались, надають значення своєму вмісту. Наприклад, елементи `paragraph` повідомляють браузеру відтворювати текст у вигляді абзацу. Елементи `strong` повідомляють браузеру, який текст важливий і так далі. А ось елементи `div` та `span` не надають певного значення своєму вмісту. Вони є звичайними блоками, які містять що завгодно.
 
 # --question--
 
 ## --text--
 
-What is the primary difference of `span` and `div` elements from other elements?
+Яка основна різниця елементів `span` та `div` від інших елементів?
 
 ## --answers--
 
-Unlike specific HTML elements that carry inherent meanings, `span` and `div` elements are versatile and are primarily used for styling and layout purposes.
+На відміну від певних елементів HTML, які містять властиве значення, елементи `span` та `div` є гнучкими та здебільшого використовуються з метою стилізації та макетування.
 
 ---
 
-`span` and `div` elements do not impart any specific semantic meaning to the content they contain, unlike other HTML elements such as paragraphs or headings.
+Елементи `span` та `div` не передають семантичного значення вмісту на відміну від інших елементів HTML, як-от абзаци та заголовки.
 
 ---
 
-`span` and `div` elements are generic containers that allow developers to apply CSS styles and structure content without any particular semantic significance.
+Елементи `span` та `div` є загальними контейнерами, які дозволяють розробникам застосувати стилі CSS та структурувати вміст без будь-якого семантичного значення.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-j.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-j.md
index 5f81f5020ca..88e904ff779 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-j.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-j.md
@@ -1,35 +1,35 @@
 ---
 id: 65704485e7b02272663824e8
-title: Learn Block and Inline Question J
+title: Блокові та рядкові елементи. Запитання J
 challengeType: 15
 dashedName: learn-block-and-inline-question-j
 ---
 
 # --description--
 
-Now that you have a basic understanding on how adding width and height to `inline` elements works, what happens when you add a top padding of 10 pixels to a `span` element?
+Тепер у вас є базове розуміння того, як додати ширину та висоту до рядкових (`inline`) елементів. Що ж відбудеться, якщо додати верхній відступ зі значенням 10 пікселів до елемента `span`?
 
 # --question--
 
 ## --text--
 
-What happens when you add `padding-top: 10px;` to a `span` element?
+Що відбудеться, якщо додати `padding-top: 10px;` до елемента `span`?
 
 ## --answers--
 
-The `span` element's content will shift downward by 10 pixels.
+Вміст елемента `span` переміститься вниз на 10 пікселів.
 
 ---
 
-The `span` element will gain additional space above its content.
+Елемент `span` отримає додаткове місце зверху свого вмісту.
 
 ---
 
-The `span` element's width will increase by 10 pixels.
+Ширина елемента `span` збільшиться на 10 пікселів.
 
 ---
 
-Padding has no effect on the layout of a `span` element.
+Відступ не впливає на макет елемента `span`.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-k.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-k.md
index c204799d7d3..fa98637c963 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-k.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-block-and-inline/learn-block-and-inline-question-k.md
@@ -1,35 +1,35 @@
 ---
 id: 65704486e7b02272663824e9
-title: Learn Block and Inline Question K
+title: Блокові та рядкові елементи. Запитання K
 challengeType: 15
 dashedName: learn-block-and-inline-question-k
 ---
 
 # --description--
 
-Now that you have a basic understanding on how adding width and height to `inline` elements works.
+Тепер ви знаєте, як додавати ширину та висоту до рядкових (`inline`) елементів.
 
 # --question--
 
 ## --text--
 
-What happens when you add a bottom padding of 15 pixels to a `span` element with display set to `inline-block`?
+Що відбудеться, якщо додати нижній відступ зі значенням 15 пікселів до елемента `span` з властивістю `display` зі значенням `inline-block`?
 
 ## --answers--
 
-The `span` element's content will shift upward by 15 pixels.
+Вміст елемента `span` переміститься вгору на 15 пікселів.
 
 ---
 
-The `span` element's width will increase by 15 pixels.
+Ширина елемента `span` збільшиться на 15 пікселів.
 
 ---
 
-The `span` element will gain additional space below its content.
+Елемент `span` отримає додаткове місце знизу свого вмісту.
 
 ---
 
-Padding has no effect on the layout of an `inline-block` `span` element.
+Відступ не впливає на макет `inline-block` елемента `span`.
 
 ## --video-solution--
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
index 355e0043d7a..703ff0bae76 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-css-foundations-projects/css-foundations-exercise-e.md
@@ -109,7 +109,6 @@ assert(getCorrectStyle()?.textAlign === 'center');
 # --seed--
 
 ## --seed-contents--
-
 ```css
 ```
 
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-b.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-b.md
index 2136f3ddd84..f0b1dfc5325 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-b.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-b.md
@@ -19,19 +19,19 @@ HTML має великий список стандартних тегів, як
 
 ## --text--
 
-Why are self-closing tags like `<br/>` or `<img>` essential in HTML?
+Чому самозакриваючі теги, як-от `<br/>` чи `<img>`, важливі в HTML?
 
 ## --answers--
 
-They prevent formatting issues in HTML documents.
+Вони запобігають виникненню проблем з форматуванням в документах HTML.
 
 ---
 
-They indicate empty elements and require no closing tag.
+Вони вказують на порожні елементи і не вимагають кінцевого тегу.
 
 ---
 
-They improve website performance by reducing code complexity.
+Вони покращують ефективність вебсайту, зменшуючи складність коду.
 
 
 ## --video-solution--
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-g.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-g.md
index d1eacaac845..5a939b52e12 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-g.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-g.md
@@ -13,19 +13,19 @@ HTML та CSS — це дві мови, які працюють разом, що
 
 ## --text--
 
-What are the primary responsibilities of HTML and CSS in creating a webpage?
+Які основні обов’язки виконують HTML та CSS при створенні вебсторінки?
 
 ## --answers--
 
-HTML structures the content, while CSS styles the elements.
+HTML структурує вміст, а CSS стилізує елементи.
 
 ---
 
-HTML creates the visual design, while CSS organizes the content.
+HTML створює візуальний дизайн, а CSS організовує вміст.
 
 ---
 
-CSS manages the functionality, while HTML controls the layout.
+CSS контролює функціоналом, а HTML — макетом.
 
 
 ## --video-solution--
diff --git a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
index 7977358d63f..139193cabd3 100644
--- a/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
+++ b/curriculum/challenges/ukrainian/16-the-odin-project/top-learn-html-foundations/html-foundations-question-h.md
@@ -13,20 +13,20 @@ dashedName: html-foundations-question-h
 
 ## --text--
 
-Why are HTML and CSS not typically classified as programming languages?
+Чому HTML та CSS зазвичай не класифікуються як мови програмування?
 
 ## --answers--
 
-They lack the ability to create webpages.
+Їм не вистачає здатності створювати вебсторінки.
 
 ---
 
-They focus on presenting information rather than programming logic.
+Вони зосереджуються на відтворенні інформації, а не логіці програмування.
 
 ---
 
-They are outdated technologies.
+Це застарілі технології.
 
 ## --video-solution--
 
-1
+2
diff --git a/curriculum/challenges/ukrainian/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md b/curriculum/challenges/ukrainian/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
index fa5b427fdc5..857d52d4c51 100644
--- a/curriculum/challenges/ukrainian/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
+++ b/curriculum/challenges/ukrainian/21-a2-english-for-developers/learn-greetings-in-your-first-day-at-the-office/657e0d0037192f3d9e3d5417.md
@@ -1,5 +1,5 @@
 ---
-id: 657e0d0037192f3d9e3d5417 
+id: 657e0d0037192f3d9e3d5417
 title: Task 128
 challengeType: 22
 dashedName: task-128
diff --git a/curriculum/challenges/ukrainian/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md b/curriculum/challenges/ukrainian/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
index f8949309ce8..8b4e002d454 100644
--- a/curriculum/challenges/ukrainian/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
+++ b/curriculum/challenges/ukrainian/21-a2-english-for-developers/learn-introductions-in-an-online-team-meeting/657c99c084204371fcb8d6a8.md
@@ -13,7 +13,7 @@ Bob: Alright, team. This is Alice's first day with _ , so please let _ introduce
 -->
 # --description--
 
-You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sould more natural. Listen for the object pronouns Bob uses in this audio.
+You can use object pronouns to replace nouns in a sentence. This avoids repetition and makes the sentence sound more natural. Listen for the object pronouns Bob uses in this audio.
 
 # --fillInTheBlank--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/100-doors.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/100-doors.md
index 59c46323064..09287dca1b6 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/100-doors.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/100-doors.md
@@ -8,11 +8,11 @@ dashedName: 100-doors
 
 # --description--
 
-There are 100 doors in a row that are all initially closed. You make 100 passes by the doors. The first time through, visit every door and 'toggle' the door (if the door is closed, open it; if it is open, close it). The second time, only visit every 2nd door (i.e., door #2, #4, #6, ...) and toggle it. The third time, visit every 3rd door (i.e., door #3, #6, #9, ...), etc., until you only visit the 100th door.
+В ряді розміщено 100 дверей, які спочатку закриті. Ви проходите 100 разів біля дверей. Першого разу «перемкніть» двері (якщо двері закриті, то відкрийте їх і навпаки). Другого разу відвідайте лише кожні другі двері (тобто двері №2, №4, №6…) і перемкніть їх. Третього разу відвідайте кожні треті двері (тобто двері №3, №6, №9…), поки не відвідаєте двері №100.
 
 # --instructions--
 
-Реалізуйте функцію, щоб визначити стан дверей після останнього проходження. Поверніть кінцевий результат в масив тільки з тими номерами дверей, які включені в масив, якщо ті відчинені.
+Реалізуйте функцію, щоб визначити стан дверей після останнього проходження. Поверніть кінцевий результат у вигляді масиву, який складається з номерів відкритих дверей.
 
 # --hints--
 
@@ -28,7 +28,7 @@ assert(typeof getFinalOpenedDoors === 'function');
 assert(Array.isArray(getFinalOpenedDoors(100)));
 ```
 
-`getFinalOpenedDoors` має досягти правильного результату.
+`getFinalOpenedDoors` має пред’явити правильний результат.
 
 ```js
 assert.deepEqual(getFinalOpenedDoors(100), solution);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/24-game.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/24-game.md
index 05e2120008e..9e478a7911d 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/24-game.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/24-game.md
@@ -8,20 +8,20 @@ dashedName: 24-game
 
 # --description--
 
-The 24 Game tests a person's mental arithmetic.
+«Гра 24» перевіряє здатність людини виконувати усні обчислення.
 
-Мета гри - впорядкувати чотири числа так, щоб при обчислюванні, результат дорівнював 24
+Мета гри — впорядкувати чотири цифри так, щоб при обчислюванні результат дорівнював 24.
 
 # --instructions--
 
-Реалізуйте функцію, яка бере за аргумент рядок з чотирьох цифр, причому кожна цифра від 1 до 9 (включно) з дозволеними повторами, що повертає арифметичний вираз, що буде дорівнювати 24. Якщо ж такого рішення не існує, то поверніть "рішення не існує".
+Реалізуйте функцію, яка приймає рядок з чотирьох цифр (від 1 до 9 включно; дозволено повторення) як аргумент та повертає арифметичний вираз, що дорівнює 24. Якщо такого розв’язку не існує, то поверніть «no solution exists».
 
 **Правила:**
 <ul>
-  <li> Only the following operators/functions are allowed: multiplication, division, addition, subtraction. </li>
-  <li> Для збереження остачі при діленні, слід використовувати арифметику з плаваючою комою, раціональну арифметику тощо. </li>
-  <li> Формування багаторозрядних чисел з даних чисел не допускається. (Отже, відповідь 12 + 12 з даними 1, 2, 2 і 1 неправильна). </li>
-  <li> Порядок цифр, коли він даний, не має зберігатися. </li>
+  <li> Дозволено тільки такі оператори/функції: множення, ділення, додавання, віднімання. </li>
+  <li> При діленні потрібно використати кому або раціональний підхід, щоб зберегти остачу. </li>
+  <li> Заборонено змінювати формат наданих цифр. (Тобто, якщо надано 1, 2, 2 та 1, то відповідь 12+12 буде неправильною). </li>
+  <li> Необов’язково дотримуватись наданого порядку цифр. </li>
 </ul>
 
 | Приклад вводу             | Приклад виводу            |
@@ -39,25 +39,25 @@ The 24 Game tests a person's mental arithmetic.
 assert(typeof solve24 === 'function');
 ```
 
-`solve24("4878")` має повернути `(7-8/8)*4`, `4*(7-8/8)`, або подібний дійсний рядок
+`solve24("4878")` має повернути `(7-8/8)*4`, `4*(7-8/8)` або схожий дійсний рядок
 
 ```js
 assert(isValidSolution_(solve24(testCases_[0])));
 ```
 
-`solve24("1234")` має повернути `1*2*3*4` або подібний дійсний рядок
+`solve24("1234")` має повернути `1*2*3*4` або схожий дійсний рядок
 
 ```js
 assert(isValidSolution_(solve24(testCases_[1])));
 ```
 
-`solve24("6789")` має повернути `(6*8)/(9-7)`, `(8*6)/(9-7)`, або подібний дійсний рядок
+`solve24("6789")` має повернути `(6*8)/(9-7)`, `(8*6)/(9-7)` або схожий дійсний рядок
 
 ```js
 assert(isValidSolution_(solve24(testCases_[2])));
 ```
 
-`solve24("1127")` має повернути `(1+7)*(1+2)` або подібний дійсний рядок
+`solve24("1127")` має повернути `(1+7)*(1+2)` або схожий дійсний рядок
 
 ```js
 assert(isValidSolution_(solve24(testCases_[3])));
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/9-billion-names-of-god-the-integer.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/9-billion-names-of-god-the-integer.md
index 5711aaff7cc..19cc1eb72e1 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/9-billion-names-of-god-the-integer.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/9-billion-names-of-god-the-integer.md
@@ -1,6 +1,6 @@
 ---
 id: 5949b579404977fbaefcd736
-title: Ціле число "9 мільярдів імен Бога"
+title: 9 мільярдів імен Бога цілих чисел
 challengeType: 1
 forumTopicId: 302219
 dashedName: 9-billion-names-of-god-the-integer
@@ -8,11 +8,11 @@ dashedName: 9-billion-names-of-god-the-integer
 
 # --description--
 
-This task is a variation of the short story by Arthur C. Clarke.
+Це завдання є варіацією оповідання Артура Ч. Кларка.
 
-(Той хто розв'язує завдання, має знати про наслідки виконання даного завдання.)
+(Розв’язувачі мають знати про наслідки виконання цього завдання.)
 
-Детальніше про те, що означає "name"(ім'я):
+Детальніше про те, що мається на увазі під «іменем»:
 
 <ul>
   <li>Ціле число 1 має одне ім’я: «1».</li>
@@ -32,13 +32,13 @@ This task is a variation of the short story by Arthur C. Clarke.
 1   3   3   2   1   1
 </pre>
 
-Де рядки $n$ відповідають цілому числу $n$ і кожна колонка $C$ у рядку $m$ зліва направо відповідає кількості імен, які починаються з $C$.
+Де рядок $n$ відповідає цілому числу $n$, а кожен стовпчик $C$ в рядку $m$ зліва направо відповідає кількості імені, починаючи з $C$.
 
-Зауважте, що сума $n$-го рядку $P(n)$ - це функція розбиття цілого числа.
+Також зауважте, що сума $n$-го рядка $P(n)$ є функцією розбивання цілого числа.
 
 # --instructions--
 
-Використовуйте функцію, що повертає суму $n$-го рядка.
+Реалізуйте функцію, яка повертає суму $n$-го рядка.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/abc-problem.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/abc-problem.md
index ddfe0b2427e..9a15f5c2c55 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/abc-problem.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/abc-problem.md
@@ -1,6 +1,6 @@
 ---
 id: 594810f028c0303b75339acc
-title: Проблема ABC
+title: Задача ABC
 challengeType: 1
 forumTopicId: 302220
 dashedName: abc-problem
@@ -8,7 +8,7 @@ dashedName: abc-problem
 
 # --description--
 
-You are given a collection of ABC blocks (e.g., childhood alphabet blocks). There are 20 blocks with two letters on each block. A complete alphabet is guaranteed amongst all sides of the blocks. The sample collection of blocks:
+Вам надано набір блоків ABC (тобто дитячі кубики з алфавітом). Загалом 20 блоків по дві літери на кожному. Гарантовано, що на блоках розташовано всі літери алфавіту. Зразок такого набору:
 
 <pre>(B O)
 (X K)
@@ -34,9 +34,9 @@ You are given a collection of ABC blocks (e.g., childhood alphabet blocks). Ther
 
 # --instructions--
 
-Реалізуйте функцію, яка бере рядок (слово) та визначає, чи можна написати слово з даного набору кубиків.
+Реалізуйте функцію, яка приймає рядок (слово) та визначає, чи з даного набору блоків можна скласти це слово.
 
-Правила, які треба добре запам'ятати:
+Деякі правила:
 
 <ul>
   <li>Якщо літера на блоці вже використана, цей блок не можна використати ще раз.</li>
@@ -51,43 +51,43 @@ You are given a collection of ABC blocks (e.g., childhood alphabet blocks). Ther
 assert(typeof canMakeWord === 'function');
 ```
 
-`canMakeWord` повинен повернути логічний тип даних.
+`canMakeWord` має повернути булеве значення.
 
 ```js
 assert(typeof canMakeWord('hi') === 'boolean');
 ```
 
-`canMakeWord("bark")` має повернути true.
+`canMakeWord("bark")` має повернути `true`.
 
 ```js
 assert(canMakeWord(words[0]));
 ```
 
-`canMakeWord("BooK")` має повернути false.
+`canMakeWord("BooK")` має повернути `false`.
 
 ```js
 assert(!canMakeWord(words[1]));
 ```
 
-`canMakeWord("TReAT")` має повернути true.
+`canMakeWord("TReAT")` має повернути `true`.
 
 ```js
 assert(canMakeWord(words[2]));
 ```
 
-`canMakeWord("COMMON")` має повернути false.
+`canMakeWord("COMMON")` має повернути `false`.
 
 ```js
 assert(!canMakeWord(words[3]));
 ```
 
-`canMakeWord("squAD")` має повернути true.
+`canMakeWord("squAD")` має повернути `true`.
 
 ```js
 assert(canMakeWord(words[4]));
 ```
 
-`canMakeWord("conFUSE")` має повернути true.
+`canMakeWord("conFUSE")` має повернути `true`.
 
 ```js
 assert(canMakeWord(words[5]));
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/abundant-deficient-and-perfect-number-classifications.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/abundant-deficient-and-perfect-number-classifications.md
index 26684ac063e..56b3fc70f03 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/abundant-deficient-and-perfect-number-classifications.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/abundant-deficient-and-perfect-number-classifications.md
@@ -1,6 +1,6 @@
 ---
 id: 594810f028c0303b75339acd
-title: 'Класифікації надлишкових, недостатніх та досконалих чисел'
+title: 'Збиткові, досконалі та надлишкові числа'
 challengeType: 1
 forumTopicId: 302221
 dashedName: abundant-deficient-and-perfect-number-classifications
@@ -8,21 +8,21 @@ dashedName: abundant-deficient-and-perfect-number-classifications
 
 # --description--
 
-These define three classifications of positive integers based on their proper divisors.
+Натуральні числа можна класифікувати на три категорії на основі їхніх властивих дільників.
 
-Нехай $P(n)$ буде сумою дільників `n`, де всі власні дільники являються додатними цілими числами `n`, на відміну від `n`.
+Нехай $P(n)$ буде сумою властивих дільників числа `n`, де властивими дільниками є всі натуральні числа `n`, окрім самого числа `n`.
 
-Якщо `P(n) < n`, то `n` являється `deficient`
+Якщо `P(n) < n`, то `n` класифікується як `deficient` (збиткове).
 
-Якщо `P(n) === n`, тоді `n` являється `perfect`
+Якщо `P(n) === n`, то `n` класифікується як `perfect` (досконале).
 
-Якщо `P(n) > n`, тоді `n` являється `abundant`
+Якщо `P(n) > n`, то `n` класифікується як `abundant` (надлишкове).
 
-**Приклад**: `6` має власний дільник `1`, `2` та `3`. `1 + 2 + 3 = 6`, тому `6` являється досконалим числом.
+**Наприклад**: властивими дільниками числа `6` є `1`, `2` та `3`. `1 + 2 + 3 = 6`, тому `6` класифікується як досконале число.
 
 # --instructions--
 
-Реалізуйте функцію, яка вираховує скільки цілих чисел від `1` до `num` (включно) є в кожному з трьох класів. Виведіть результат як масив у наступному форматі `[deficient, perfect, abundant]`.
+Реалізуйте функцію, яка розраховує кількість цілих чисел від `1` до `num` (включно) в кожній з трьох категорій. Виведіть результат у вигляді масиву в наступному форматі: `[збиткове, досконале, надлишкове]`.
 
 # --hints--
 
@@ -38,7 +38,7 @@ assert(typeof getDPA === 'function');
 assert(Array.isArray(getDPA(5000)));
 ```
 
-`getDPA(5000)` повернений масив має мати довжину `3`.
+`getDPA(5000)` має повернути масив довжиною `3`.
 
 ```js
 assert(getDPA(5000).length === 3);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/accumulator-factory.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/accumulator-factory.md
index d89b8be7275..a77c18e1033 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/accumulator-factory.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/accumulator-factory.md
@@ -1,6 +1,6 @@
 ---
 id: 594810f028c0303b75339ace
-title: Акумуляторна фабрика
+title: Фабрика акумуляторів
 challengeType: 1
 forumTopicId: 302222
 dashedName: accumulator-factory
@@ -8,11 +8,11 @@ dashedName: accumulator-factory
 
 # --description--
 
-A problem posed by Paul Graham is that of creating a function that takes a single (numeric) argument and which returns another function that is an accumulator. The returned accumulator function in turn also takes a single numeric argument, and returns the sum of all the numeric values passed in so far to that accumulator (including the initial value passed when the accumulator was created).
+Проблема, поставлена Полом Гремом, полягає у створенні функції, яка приймає один (числовий) аргумент та повертає іншу функцію, тобто акумулятор. Повернений акумулятор також приймає один числовий аргумент та повертає суму всіх числових значень, переданих до акумулятора (включно з початковим переданим значенням, коли було створено акумулятор).
 
 # --instructions--
 
-Створіть функцію, яка приймає число $n$ і генерує акумуляторні функції, які повертають суму кожного числа, яке до них додадуть.
+Створіть функцію, яка приймає число $n$ та генерує акумулятори, що повертають суму всіх переданих чисел.
 
 **Правила:**
 
@@ -20,7 +20,7 @@ A problem posed by Paul Graham is that of creating a function that takes a singl
 
 **Підказка:**
 
-Закриття економить зовнішній стан.
+Замикання економить зовнішній стан.
 
 # --hints--
 
@@ -30,19 +30,19 @@ A problem posed by Paul Graham is that of creating a function that takes a singl
 assert(typeof accumulator === 'function');
 ```
 
-`accumulator(0)` має відображати функцію.
+`accumulator(0)` має повернути функцію.
 
 ```js
 assert(typeof accumulator(0) === 'function');
 ```
 
-`accumulator(0)(2)` має відображати число.
+`accumulator(0)(2)` має повернути число.
 
 ```js
 assert(typeof accumulator(0)(2) === 'number');
 ```
 
-Перехід у значеннях 3, -4, 1.5 і 5 має видати 5,5.
+Якщо передати значення 3, -4, 1.5 та 5, то має повернутись 5.5.
 
 ```js
 assert(testFn(5) === 5.5);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/ackermann-function.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/ackermann-function.md
index ec2c461a2be..b92dc292275 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/ackermann-function.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/ackermann-function.md
@@ -8,17 +8,17 @@ dashedName: ackermann-function
 
 # --description--
 
-The Ackermann function is a classic example of a recursive function, notable especially because it is not a primitive recursive function. It grows very quickly in value, as does the size of its call tree.
+Функція Акермана — класичний приклад рекурсивної функції, особливо через те, що вона не є примітивною рекурсивною функцією. Вона дуже швидко зростає у значенні, зростає і дерево викликів.
 
-Функція Акермана зазвичай визначається наступним чином:
+Зазвичай функцію Акермана визначено наступним чином:
 
-$A(m, n) = \\begin{cases} n+1 & \\mbox{if } m = 0 \\\\ A(m-1, 1) & \\mbox{if } m > 0 \\mbox{ and } n = 0 \\\\ A(m-1, A(m, n-1)) & \\mbox{if } m > 0 \\mbox{ and } n > 0. \\end{cases}$
+$A(m, n) = \\begin{cases} n+1 & \\mbox{якщо } m = 0 \\\\ A(m-1, 1) & \\mbox{якщо } m > 0 \\mbox{ та } n = 0 \\\\ A(m-1, A(m, n-1)) & \\mbox{якщо } m > 0 \\mbox{ та } n > 0. \\end{cases}$
 
-Її аргументи ніколи не є від'ємними, і вона завжди закінчується.
+Її аргументи завжди додатні, і вона завжди закінчується.
 
 # --instructions--
 
-Напишіть функцію, що повертає значення $A(m, n)$. Довільна точність є бажаною (оскільки функція зростає так швидко), але не є обов'язковою.
+Напишіть функцію, яка повертає значення $A(m, n)$. Довільна точність бажана (оскільки функція швидко зростає), але не є обов’язковою.
 
 # --hints--
 
@@ -28,25 +28,25 @@ $A(m, n) = \\begin{cases} n+1 & \\mbox{if } m = 0 \\\\ A(m-1, 1) & \\mbox{if } m
 assert(typeof ack === 'function');
 ```
 
-`ack(0, 0)` повинен повернутися як 1.
+`ack(0, 0)` має повернути 1.
 
 ```js
 assert(ack(0, 0) === 1);
 ```
 
-`ack(1, 1)` має повернутися як 3.
+`ack(1, 1)` має повернути 3.
 
 ```js
 assert(ack(1, 1) === 3);
 ```
 
-`ack(2, 5)` повинен повернутися як 13.
+`ack(2, 5)` має повернути 13.
 
 ```js
 assert(ack(2, 5) === 13);
 ```
 
-`ack(3, 3)` повинен повертатися як 61.
+`ack(3, 3)` має повернути 61.
 
 ```js
 assert(ack(3, 3) === 61);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/align-columns.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/align-columns.md
index 146c1fbad9f..0d457833664 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/align-columns.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/align-columns.md
@@ -8,11 +8,11 @@ dashedName: align-columns
 
 # --description--
 
-Given an array of many lines, where fields within a line are delineated by a single `$` character, write a program that aligns each column of fields by ensuring that words in each column are separated by at least one space. Further, allow for each word in a column to be either left justified, right justified, or center justified within its column.
+Вам надано масив з багатьма рядками, де поля в межах рядків обмежені символом `$`. Напишіть програму, яка вирівнює кожен стовпець поля, переконавшись, що слова в кожному стовпці розділені принаймні одним пробілом. Крім того, дозвольте кожному слову в стовпці вирівнюватись за лівим краєм, за правим краєм або по центру.
 
 # --instructions--
 
-Щоб перевірити свої програми, використовуйте наступний текст:
+Використайте наступний текст, щоб протестувати програми:
 
 ```js
 const testText = [
@@ -29,16 +29,16 @@ const testText = [
 ];
 ```
 
-**Зауважте, що:**
+**Зверніть увагу:**
 
 - Введені тексти в прикладі можуть мати символ долара вкінці.
 - Усі стовпці повинні мати однакове вирівнювання.
-- Декілька послідовно розміщених символів пробілу у кінці рядків, є неважливими для цілей завдання.
-- Вихідний текст буде відображатися моношироким шрифтом у звичайному текстовому редакторі або базовому терміналі. Рядки в ньому слід з'єднати, використовуючи новий символ рядка (`\n`).
-- Мінімальний простір між стовпцями слід обчислювати з даного тексту, а не жорстко його кодувати.
-- Не обов'язково додавати розділові символи між стовпцями або навколо них.
+- Послідовні пробіли, які виникають поруч з кінцем рядків, є незначними для цілей завдання.
+- Вихідний текст буде переглядатися у моноширинному шрифті в звичайному текстовому редакторі або простому терміналі. Рядки в ньому потрібно з’єднати за допомогою символу нового рядка (`\n`).
+- Мінімальний проміжок між стовпцями має обчислюватися з тексту, а не бути жорстко закодованим.
+- Необов’язково додавати розділові символи між стовпцями або навколо них.
 
-Наприклад, один з рядків взятий із `testText`, після вирівнювання праворуч, ліворуч та посередині відповідно:
+Наприклад, ось один з рядків в `testText` після вирівнювання за правим краєм, за лівим краєм та по центру:
 
 ```js
 '    column        are separated     by     at    least       one space.\n'
@@ -54,19 +54,19 @@ const testText = [
 assert(typeof formatText === 'function');
 ```
 
-`formatText(testText, 'right')` має створити стовпець із текстом, який буде вирівняний по правій стороні.
+`formatText(testText, 'right')` має продукувати текст зі стовпцями, вирівняними за правим краєм.
 
 ```js
 assert.strictEqual(formatText(_testText, 'right'), rightAligned);
 ```
 
-`formatText(testText, 'left')` має створити стовпець із текстом, який буде вирівняний по лівій стороні.
+`formatText(testText, 'left')` має продукувати текст зі стовпцями, вирівняними за лівим краєм.
 
 ```js
 assert.strictEqual(formatText(_testText, 'left'), leftAligned);
 ```
 
-`formatText(testText, 'center')` має створити стовпець із текстом, який буде вирівняний по центру.
+`formatText(testText, 'center')` має продукувати текст зі стовпцями, вирівняними по центру.
 
 ```js
 assert.strictEqual(formatText(_testText, 'center'), centerAligned);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/amicable-pairs.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/amicable-pairs.md
index 3fcfcfa9740..61258127cc0 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/amicable-pairs.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/amicable-pairs.md
@@ -8,22 +8,22 @@ dashedName: amicable-pairs
 
 # --description--
 
-Two integers $N$ and $M$ are said to be amicable pairs if $N \\neq M$ and the sum of the proper divisors of $N$ ($\\mathrm{sum}(\\mathrm{propDivs}(N))$) $= M$ as well as $\\mathrm{sum}(\\mathrm{propDivs}(M)) = N$.
+Два цілих числа $N$ та $M$ називають парою дружніх чисел, якщо $N \\neq M$, сума властивих дільників числа $N$ становить ($\\mathrm{sum}(\\mathrm{propDivs}(N))$) $= M$, а також $\\mathrm{sum}(\\mathrm{propDivs}(M)) = N$.
 
 **Наприклад:**
 
-**1184** та **1210** - це дружні числа з власними дільниками:
+**1184** та **1210** є парою дружніх чисел з властивими дільниками:
 
 <ul>
   <li>1, 2, 4, 8, 16, 32, 37, 74, 148, 296, 592 та</li>
   <li>1, 2, 5, 10, 11, 22, 55, 110, 121, 242, 605 відповідно.</li>
 </ul>
 
-Сума дільників для першого значення, **1184**, це **1210**, а сума дільників для другого значення, **1210**, це **1184**.
+Сумою дільників для першого значення (**1184**) є **1210**, а сумою дільників для другого значення (**1210**) є **1184**.
 
 # --instructions--
 
-Порахуйте та покажіть тут дружні числа менші 20 000 (тут їх вісім).
+Знайдіть та покажіть пари дружніх чисел до 20 000 (всього вісім пар).
 
 # --hints--
 
@@ -33,19 +33,19 @@ Two integers $N$ and $M$ are said to be amicable pairs if $N \\neq M$ and the su
 assert(typeof amicablePairsUpTo === 'function');
 ```
 
-`amicablePairsUpTo(300)` повинен повертати `[[220,284]]`.
+`amicablePairsUpTo(300)` має повернути `[[220,284]]`.
 
 ```js
 assert.deepEqual(amicablePairsUpTo(300), answer300);
 ```
 
-`amicablePairsUpTo(3000)` повинен повертати `[[220,284],[1184,1210],[2620,2924]]`.
+`amicablePairsUpTo(3000)` має повернути `[[220,284],[1184,1210],[2620,2924]]`.
 
 ```js
 assert.deepEqual(amicablePairsUpTo(3000), answer3000);
 ```
 
-`amicablePairsUpTo(20000)` повинен повертати `[[220,284],[1184,1210],[2620,2924],[5020,5564],[6232,6368],[10744,10856],[12285,14595],[17296,18416]]`.
+`amicablePairsUpTo(20000)` має повернути `[[220,284],[1184,1210],[2620,2924],[5020,5564],[6232,6368],[10744,10856],[12285,14595],[17296,18416]]`.
 
 ```js
 assert.deepEqual(amicablePairsUpTo(20000), answer20000);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/averages-mode.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/averages-mode.md
index 79d70dcd18d..d53aeb4abd4 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/averages-mode.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/averages-mode.md
@@ -1,6 +1,6 @@
 ---
 id: 594d8d0ab97724821379b1e6
-title: Середні значення/Режим
+title: 'Середні значення: мода'
 challengeType: 1
 forumTopicId: 302226
 dashedName: averagesmode
@@ -8,11 +8,11 @@ dashedName: averagesmode
 
 # --description--
 
-Write a function `mode` to find the value that appears most in an array.
+Напишіть функцію `mode`, щоб знайти значення, яке найчастіше зустрічається в масиві.
 
-Випадок, коли колекція є порожньою, можна ігнорувати. Необхідно бути обережним у випадку, коли режим не є унікальним.
+Випадок, де множина є порожньою, можна ігнорувати. Особливо зверніть увагу на випадки, де мода не є унікальною.
 
-Якщо недоцільно або неможливо підтримувати загальну колекцію, по можливості використовуйте вектор (масив). Якщо недоцільно або неможливо підтримувати невизначений тип значення, то використовуйте цілі числа.
+Якщо недоцільно або неможливо підтримати загальну множину, по можливості використайте вектор (масив). Якщо недоцільно або неможливо підтримати невизначений тип значень, використайте цілі числа.
 
 # --hints--
 
@@ -22,13 +22,13 @@ Write a function `mode` to find the value that appears most in an array.
 assert(typeof mode === 'function');
 ```
 
-`mode([1, 3, 6, 6, 6, 6, 7, 7, 12, 12, 17])` повинен дорівнювати `[6]`
+`mode([1, 3, 6, 6, 6, 6, 7, 7, 12, 12, 17])` має дорівнювати `[6]`.
 
 ```js
 assert.deepEqual(mode(arr1), [6]);
 ```
 
-`mode([1, 2, 4, 4, 1])` повинен дорівнювати `[1, 4]`.
+`mode([1, 2, 4, 4, 1])` має дорівнювати `[1, 4]`.
 
 ```js
 assert.deepEqual(mode(arr2).sort(), [1, 4]);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/averages-pythagorean-means.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/averages-pythagorean-means.md
index 3a0c29bcb8d..a167707a931 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/averages-pythagorean-means.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/averages-pythagorean-means.md
@@ -1,6 +1,6 @@
 ---
 id: 594d966a1467eb84194f0086
-title: Піфагорові середні
+title: 'Середні значення: Піфагорові середні'
 challengeType: 1
 forumTopicId: 302227
 dashedName: averagespythagorean-means
@@ -8,9 +8,9 @@ dashedName: averagespythagorean-means
 
 # --description--
 
-Compute all three of the <a href="https://en.wikipedia.org/wiki/Pythagorean_means" target="_blank" rel="noopener noreferrer nofollow">Pythagorean means</a> of the set of integers $1$ through $10$ (inclusive).
+Обчисліть всі три <a href="https://uk.wikipedia.org/wiki/Піфагорові_середні" target="_blank" rel="noopener noreferrer nofollow">Піфагорові середні</a> з множини цілих чисел від $1$ до $10$ (включно).
 
-Покажіть, що $A(x_1,\\ldots,x_n) \\geq G(x_1,\\ldots,x_n) \\geq H(x_1,\\ldots,x_n)$ для цього набору цілих чисел.
+Доведіть, що $A(x_1,\\ldots,x_n) \\geq G(x_1,\\ldots,x_n) \\geq H(x_1,\\ldots,x_n)$ для цієї множини натуральних чисел.
 
 <ul>
   <li>Найчастішим з трьох середніх є <a class='rosetta__link--rosetta' href='https://rosettacode.org/wiki/Averages/Arithmetic mean' title='Averages/Arithmetic mean' target='_blank'>середнє арифметичне</a> — сума множини, поділена на її довжину:<br>
@@ -23,9 +23,9 @@ Compute all three of the <a href="https://en.wikipedia.org/wiki/Pythagorean_mean
 
 # --instructions--
 
-При написанні функції, врахуйте, що вхідні дані — впорядкований масив всіх включених чисел.
+При написанні функції врахуйте, що вхідними даними є впорядкований масив всіх включених чисел.
 
-Для відповіді, будь ласка, виведіть об'єкт у наступному форматі:
+У відповіді, будь ласка, надайте об’єкт в наступному форматі:
 
 ```js
 {
@@ -46,7 +46,7 @@ Compute all three of the <a href="https://en.wikipedia.org/wiki/Pythagorean_mean
 assert(typeof pythagoreanMeans === 'function');
 ```
 
-`pythagoreanMeans([1, 2, ..., 10])` має дорівнювати тому ж результату, що й вище.
+`pythagoreanMeans([1, 2, ..., 10])` має дорівнювати вихідним даним вище.
 
 ```js
 assert.deepEqual(pythagoreanMeans(range1), answer1);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/averages-root-mean-square.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/averages-root-mean-square.md
index 70d16a8836d..742ed47a875 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/averages-root-mean-square.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/averages-root-mean-square.md
@@ -1,6 +1,6 @@
 ---
 id: 594da033de4190850b893874
-title: Середнє значення квадратного кореня
+title: 'Середні значення: середнє квадратне значення'
 challengeType: 1
 forumTopicId: 302228
 dashedName: averagesroot-mean-square
@@ -8,9 +8,9 @@ dashedName: averagesroot-mean-square
 
 # --description--
 
-Compute the Root Mean Square (RMS) of the numbers 1 through 10 inclusive.
+Знайдіть середнє квадратне значення (RMS) чисел від 1 до 10 включно.
 
-<abbr title="Середнє квадратичне">Середнє квадратичне</abbr> обчислюється беручи квадратний корінь із середніх квадратів чисел, отриманих за формулою:
+Щоб знайти <abbr title="Root mean square">середнє квадратне значення</abbr>, знайдіть квадратний корінь середнього значення чисел, що задано формулою:
 
 $$x\_{\\mathrm{rms}} = \\sqrt {{{x_1}^2 + {x_2}^2 + \\cdots + {x_n}^2} \\over n}. $$
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/babbage-problem.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/babbage-problem.md
index 9ae0e103dad..587641a2289 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/babbage-problem.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/babbage-problem.md
@@ -8,20 +8,20 @@ dashedName: babbage-problem
 
 # --description--
 
-Charles Babbage, looking ahead to the sorts of problems his Analytical Engine would be able to solve, gave this example:
+Чарльз Беббідж, розглядаючи типи проблем, які зможе вирішити його аналітична машина, навів такий приклад:
 
 <blockquote>
   Яке найменше натуральне число, квадрат якого закінчується цифрами 269 696?
   <footer style='margin-left: 2em;'>Беббідж, лист до лорда Боудена, 1837; див. Hollingdale and Tootill, <i>Electronic Computers</i>, друге видання, 1970, ст. 125.</footer>
 </blockquote>
 
-Він думав, що відповідь може бути 99,736, квадрат якого становить 9,947,269,696; але він не міг бути певним.
+Він думав, що відповіддю може бути число 99 736, квадрат якого становить 9 947 269 696; але він не був певним.
 
-Завдання полягає в тому, щоб з'ясувати, чи відповідь Беббіджа була правильною.
+Завдання полягає в тому, щоб з’ясувати, чи відповідь Беббіджа була правильною.
 
 # --instructions--
 
-Реалізуйте функцію, щоб повернути найменше ціле число, що задовольняє задачу Беббіджа. Якщо Беббідж мав рацію, то поверніть число Беббіджа.
+Реалізуйте функцію, щоб повернути найменше ціле число, яке задовольняє задачу Беббіджа. Якщо Беббідж мав рацію, то поверніть число Беббіджа.
 
 # --hints--
 
@@ -31,7 +31,7 @@ Charles Babbage, looking ahead to the sorts of problems his Analytical Engine wo
 assert(typeof babbage === 'function');
 ```
 
-`babbage(99736, 269696)` не повинна повертати 99736 (відповідь має бути меншою).
+`babbage(99736, 269696)` має повернути не `99736` (існує менша відповідь).
 
 ```js
 assert.equal(babbage(babbageAns, endDigits), answer);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/balanced-brackets.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/balanced-brackets.md
index 3290ff7e43c..d845d431905 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/balanced-brackets.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/balanced-brackets.md
@@ -8,17 +8,17 @@ dashedName: balanced-brackets
 
 # --description--
 
-Determine whether a generated string of brackets is balanced; that is, whether it consists entirely of pairs of opening/closing brackets (in that order), none of which mis-nest.
+Визначте, чи згенерований рядок дужок збалансований. Тобто чи він складається з пар відкриваючих/закриваючих дужок (у такому ж порядку), кожна з яких на своєму місці.
 
 **Приклади:**
-| Input                     | Результат |
-| ------------------------- | --------- |
-| <code>\[]</code> | true      |
-| <code>]\[</code> | false     |
-| <code>[][]</code> | true      |
-| <code>]\[]</code> | false     |
-| <code>\[]]\[\[]</code> | false     |
-| <code>\[\[\[\[]]]]</code> | true      |
+| Ввід                      | Вивід |
+| ------------------------- | ----- |
+| <code>\[]</code> | true  |
+| <code>]\[</code> | false |
+| <code>[][]</code> | true  |
+| <code>]\[]</code> | false |
+| <code>\[]]\[\[]</code> | false |
+| <code>\[\[\[\[]]]]</code> | true  |
 
 # --hints--
 
@@ -28,109 +28,109 @@ Determine whether a generated string of brackets is balanced; that is, whether i
 assert(typeof isBalanced === 'function');
 ```
 
-Функція `isBalanced("[]")` має повернути true.
+`isBalanced("[]")` має повернути `true`.
 
 ```js
 assert(isBalanced(testCases[0]));
 ```
 
-Функція `isBalanced("]][[[][][][]][")` має повернути false.
+`isBalanced("]][[[][][][]][")` має повернути `false`.
 
 ```js
 assert(!isBalanced(testCases[1]));
 ```
 
-Функція `isBalanced("[][[[[][][[[]]]]]]")` має повернути true.
+`isBalanced("[][[[[][][[[]]]]]]")` має повернути `true`.
 
 ```js
 assert(isBalanced(testCases[2]));
 ```
 
-Функція `isBalanced("][")` має повернути false.
+`isBalanced("][")` має повернути `false`.
 
 ```js
 assert(!isBalanced(testCases[3]));
 ```
 
-Функція `isBalanced("[[[]]]][[]")` має повернути false.
+`isBalanced("[[[]]]][[]")` має повернути `false`.
 
 ```js
 assert(!isBalanced(testCases[4]));
 ```
 
-Функція `isBalanced("][[]")` має повернути false.
+`isBalanced("][[]")` має повернути `false`.
 
 ```js
 assert(!isBalanced(testCases[5]));
 ```
 
-Функція `isBalanced("][[][]][[[]]")` має повернути false.
+`isBalanced("][[][]][[[]]")` має повернути `false`.
 
 ```js
 assert(!isBalanced(testCases[6]));
 ```
 
-Функція `isBalanced("[[][]]][")` має повернути false.
+`isBalanced("[[][]]][")` має повернути `false`.
 
 ```js
 assert(!isBalanced(testCases[7]));
 ```
 
-Функція `isBalanced("[[[]]][[]]]][][[")` має повернути false.
+`isBalanced("[[[]]][[]]]][][[")` має повернути `false`.
 
 ```js
 assert(!isBalanced(testCases[8]));
 ```
 
-Функція `isBalanced("[]][[]]][[[[][]]")` має повернути false.
+`isBalanced("[]][[]]][[[[][]]")` має повернути `false`.
 
 ```js
 assert(!isBalanced(testCases[9]));
 ```
 
-Функція `isBalanced("][]][[][")` має повернути false.
+`isBalanced("][]][[][")` має повернути `false`.
 
 ```js
 assert(!isBalanced(testCases[10]));
 ```
 
-Функція `isBalanced("[[]][[][]]")` має повернути true.
+`isBalanced("[[]][[][]]")` має повернути `true`.
 
 ```js
 assert(isBalanced(testCases[11]));
 ```
 
-Функція `isBalanced("[[]]")` має повернути true.
+`isBalanced("[[]]")` має повернути `true`.
 
 ```js
 assert(isBalanced(testCases[12]));
 ```
 
-Функція `isBalanced("]][]][[]][[[")` має повернути false.
+`isBalanced("]][]][[]][[[")` має повернути `false`.
 
 ```js
 assert(!isBalanced(testCases[13]));
 ```
 
-Функція `isBalanced("][]][][[")` має повернути false.
+`isBalanced("][]][][[")` має повернути `false`.
 
 ```js
 assert(!isBalanced(testCases[14]));
 ```
 
-Функція `isBalanced("][][")` має повернути false.
+`isBalanced("][][")` має повернути `false`.
 
 ```js
 assert(!isBalanced(testCases[15]));
 ```
 
-Функція `isBalanced("[]]]")` має повернути false.
+`isBalanced("[]]]")` має повернути `false`.
 
 ```js
 assert(!isBalanced(testCases[16]));
 ```
 
-Функція `isBalanced("")` має повернути true.
+`isBalanced("")` має повернути `true`.
 
 ```js
 assert(isBalanced(testCases[17]));
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/circles-of-given-radius-through-two-points.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/circles-of-given-radius-through-two-points.md
index dae66290f23..9433a59d9f5 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/circles-of-given-radius-through-two-points.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/circles-of-given-radius-through-two-points.md
@@ -8,27 +8,27 @@ dashedName: circles-of-given-radius-through-two-points
 
 # --description--
 
-Given two points on a plane and a radius, usually two circles of given radius can be drawn through the points.
+Якщо дано дві точки на площині та радіус, то зазвичай через ці точки можна провести два кола заданого радіуса.
 
 **Винятки:**
 
 <ul>
-  <li>A radius of zero should be treated as never describing circles (except in the case where the points are coincident).</li>
-  <li>If the points are coincident then an infinite number of circles with the point on their circumference can be drawn, unless the radius is equal to zero as well which then collapses the circles to a point.</li>
-  <li>If the points form a diameter then return a single circle.</li>
-  <li>If the points are too far apart then no circles can be drawn.</li>
+  <li>Нульовий радіус повинен розглядатися як такий, що ніколи не описує кола (крім випадку, коли точки співпадають).</li>
+  <li>Якщо точки збігаються, то можна намалювати нескінченну кількість кіл, що проходять через цю точку на окружності (крім випадку, коли радіус також дорівнює нулю, що перетворить кола на точку).</li>
+  <li>Якщо точки утворюють діаметр, то поверніть одне коло.</li>
+  <li>Якщо точки знаходяться занадто далеко одна від одної, то неможливо намалювати кола.</li>
 </ul>
 
 # --instructions--
 
-Реалізуйте функцію, яка приймає дві точки і радіус і повертається як два кола через ці точки. Для кожного кола, що утвориться, встановіть координати для центру кожного кола округлені до чотирьох десяткових чисел. Поверніть кожну координату як масив і координати як масив масивів.
+Напишіть функцію, яка приймає дві точки і радіус та повертає два кола через ці точки. Для кожного отриманого кола надайте координати центру, округлені до чотирьох знаків після коми. Поверніть кожну координату як масив, а координати — як масив масивів.
 
-**Для складних випадків повертається наступне:**
+**В граничних випадках поверніть наступне:**
 
 <ul>
-  <li>If points are on the diameter, return one point. If the radius is also zero however, return <code>"Radius Zero"</code>.</li>
-  <li>Якщо точки збігаються, поверніть <code>"Точку збігу. Безкінечні рішення"</code>.</li>
-  <li>Якщо точки розташовані далі, ніж діаметр, поверніть <code>"Без перетину. Точки, які віддалені одна від одної, відносно діаметра кола"</code>.</li>
+  <li>Якщо точки знаходяться на діаметрі, поверніть одну точку. Якщо радіус також дорівнює нулю, то поверніть <code>"Radius Zero"</code>.</li>
+  <li>Якщо точки збігаються, то поверніть <code>"Coincident point. Infinite solutions"</code>.</li>
+  <li>Якщо точки знаходяться одна від одної далі за діаметр, то поверніть <code>"No intersection. Points further apart than circle diameter"</code>.</li>
 </ul>
 
 **Приклади вхідних даних:**
@@ -49,31 +49,31 @@ Given two points on a plane and a radius, usually two circles of given radius ca
 assert(typeof getCircles === 'function');
 ```
 
-`getCircles([0.1234, 0.9876], [0.8765, 0.2345], 2.0)` повинен повернутися як `[[1.8631, 1.9742], [-0.8632, -0.7521]]`.
+`getCircles([0.1234, 0.9876], [0.8765, 0.2345], 2.0)` має повернути `[[1.8631, 1.9742], [-0.8632, -0.7521]]`.
 
 ```js
 assert.deepEqual(getCircles(...testCases[0]), answers[0]);
 ```
 
-`getCircles([0.0000, 2.0000], [0.0000, 0.0000], 1.0)` повинен повернутися як `[0, 1]`
+`getCircles([0.0000, 2.0000], [0.0000, 0.0000], 1.0)` має повернути `[0, 1]`
 
 ```js
 assert.deepEqual(getCircles(...testCases[1]), answers[1]);
 ```
 
-`getCircles([0.1234, 0.9876], [0.1234, 0.9876], 2.0)` має повертатися `Точка збігу. Безкінечні рішення"`
+`getCircles([0.1234, 0.9876], [0.1234, 0.9876], 2.0)` має повернути `Coincident point. Infinite solutions`
 
 ```js
 assert.deepEqual(getCircles(...testCases[2]), answers[2]);
 ```
 
-`getCircles([0.1234, 0.9876], [0.8765, 0.2345], 0.5)` має повертатися `Без перетину. Точки, які віддалені одна від одної, відносно діаметра кола"`
+`getCircles([0.1234, 0.9876], [0.8765, 0.2345], 0.5)` має повернути `No intersection. Points further apart than circle diameter`
 
 ```js
 assert.deepEqual(getCircles(...testCases[3]), answers[3]);
 ```
 
-`getCircles([0.1234, 0.9876], [0.1234, 0.9876], 0.0)` має повертатися як `Radius Zero`
+`getCircles([0.1234, 0.9876], [0.1234, 0.9876], 0.0)` має повернути `Radius Zero`
 
 ```js
 assert.deepEqual(getCircles(...testCases[4]), answers[4]);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/closest-pair-problem.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/closest-pair-problem.md
index 8952a266c07..25b5b652a62 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/closest-pair-problem.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/closest-pair-problem.md
@@ -8,9 +8,9 @@ dashedName: closest-pair-problem
 
 # --description--
 
-Provide a function to find the closest two points among a set of given points in two dimensions.
+Надайте функцію для пошуку двох найближчих точок серед наданої множини точок у двох вимірах.
 
-Найпростіше рішення це $O(n^2)$ алгоритм (який ми можемо назвати *brute-force algorithm*); цей псевдо-код (з використанням індексів) може бути простим:
+Найпростіший розв’язок — алгоритм $O(n^2)$ (який називають *пошуком грубою силою*); псевдокодом (з використанням індексів) буде:
 
 <pre><strong>bruteForceClosestPair</strong> of P(1), P(2), ... P(N)
 <strong>if</strong> N &#x3C; 2 <strong>then</strong>
@@ -30,7 +30,7 @@ Provide a function to find the closest two points among a set of given points in
 <strong>endif</strong>
 </pre>
 
-Кращий алгоритм базується на рекурсивному розподілі та підхопленні, який є псевдо-кодом $O(n\log n)$:
+Кращий алгоритм базується на підході «Розділяй та володарюй», де $O(n\log n)$. Псевдокодом буде:
 
 <pre><strong>closestPair</strong> of (xP, yP)
   where xP is P(1) .. P(N) sorted by x coordinate, and
@@ -65,7 +65,7 @@ Provide a function to find the closest two points among a set of given points in
 <strong>endif</strong>
 </pre>
 
-Для вхідних даних, слід очікувати, що аргумент буде масивом з `Point` об'єктами, і `x` та `y` заданими числами. Поверніть об'єкт, що містить ключові пари значень для `distance` та `pair` (пара двох найближчих точок).
+Для вхідних даних варто очікувати, що аргументом буде масив об’єктів `Point` з членами `x` та `y` зі значеннями чисел. Поверніть об’єкт, який містить пари ключ:значення із `distance` та `pair` (пара двох найближчих точок).
 
 Наприклад, `getClosestPair` з вхідним масивом `points`:
 
@@ -95,7 +95,7 @@ const points = [
 }
 ```
 
-**Note:** Сортуйте `pair` масиви за їхніми `x` значеннями у зростаючому порядку.
+**Примітка:** відсортуйте масив `pair` за значенням `x` у висхідному порядку.
 
 
 # --hints--
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/combinations.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/combinations.md
index 56472872c0f..52b508cbeb7 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/combinations.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/combinations.md
@@ -8,11 +8,11 @@ dashedName: combinations
 
 # --description--
 
-Given non-negative integers `m` and `n`, generate all size `m` combinations of the integers from `0` (zero) to `n-1` in sorted order (each combination is sorted and the entire table is sorted).
+Вам дано невід’ємні цілі числа `m` та `n`. Згенеруйте `m` комбінацій всіх розмірів з цілих чисел від `0` (нуля) до `n-1` у відсортованому порядку (всі комбінації та таблиця мають бути відсортованими).
 
 **Наприклад:**
 
-`3` комб. `5` дає:
+Комбінаціями чисел `3` та `5` є:
 
 <pre>0 1 2
 0 1 3
@@ -34,13 +34,13 @@ Given non-negative integers `m` and `n`, generate all size `m` combinations of t
 assert(typeof combinations === 'function');
 ```
 
-Функція `combinations(3, 5)` повинна вертати `[[0, 1, 2], [0, 1, 3], [0, 1, 4], [0, 2, 3], [0, 2, 4], [0, 3, 4], [1, 2, 3], [1, 2, 4], [1, 3, 4], [2, 3, 4]]`.
+`combinations(3, 5)` має повернути `[[0, 1, 2], [0, 1, 3], [0, 1, 4], [0, 2, 3], [0, 2, 4], [0, 3, 4], [1, 2, 3], [1, 2, 4], [1, 3, 4], [2, 3, 4]]`.
 
 ```js
 assert.deepEqual(combinations(testInput1[0], testInput1[1]), testOutput1);
 ```
 
-Функція `combinations(4, 6)` повинна вертати `[[0,1,2,3], [0,1,2,4], [0,1,2,5], [0,1,3,4], [0,1,3,5], [0,1,4,5], [0,2,3,4], [0,2,3,5], [0,2,4,5], [0,3,4,5], [1,2,3,4], [1,2,3,5], [1,2,4,5], [1,3,4,5], [2,3,4,5]]`
+`combinations(4, 6)` має повернути `[[0,1,2,3], [0,1,2,4], [0,1,2,5], [0,1,3,4], [0,1,3,5], [0,1,4,5], [0,2,3,4], [0,2,3,5], [0,2,4,5], [0,3,4,5], [1,2,3,4], [1,2,3,5], [1,2,4,5], [1,3,4,5], [2,3,4,5]]`
 
 ```js
 assert.deepEqual(combinations(testInput2[0], testInput2[1]), testOutput2);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/comma-quibbling.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/comma-quibbling.md
index f7833ab3138..b7230ad0a46 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/comma-quibbling.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/comma-quibbling.md
@@ -1,6 +1,6 @@
 ---
 id: 596e414344c3b2872167f0fe
-title: Comma quibbling (створення рядків значень розділених комою)
+title: Гра комами
 challengeType: 1
 forumTopicId: 302234
 dashedName: comma-quibbling
@@ -8,11 +8,11 @@ dashedName: comma-quibbling
 
 # --description--
 
-<a href="https://rosettacode.org/wiki/Comma_quibbling" target="_blank" rel="noopener noreferrer nofollow">Comma quibbling</a> is a task originally set by Eric Lippert in his blog.
+<a href="https://rosettacode.org/wiki/Comma_quibbling" target="_blank" rel="noopener noreferrer nofollow">Гра комами</a> — це завдання, яке спочатку з’явилось на блозі Еріка Ліпперта.
 
 # --instructions--
 
-Напишіть функцію для генерації вихідного рядка, який є об'єднанням вхідних слів з списку/послідовності, де:
+Напишіть функцію для генерації вихідного рядка, який є об’єднанням вхідних слів зі списку/послідовності, де:
 
 <ol>
   <li>Ввід без слів повертає вихідний рядок лише з двох дужок (<code>"{}"</code>)</li>
@@ -21,7 +21,7 @@ dashedName: comma-quibbling
   <li>Ввід трьох і більше слів (наприклад, <code>["ABC", "DEF", "G", "H"]</code>) повертає вихідний рядок зі всіма словами в дужках, де слова розділені <code>", "</code>, а останнє слово розділене <code>" and "</code> (наприклад, <code>"{ABC, DEF, G and H}"</code>)</li>
 </ol>
 
-Перевірте вашу функцію з наступною серією вхідних даних, показуючи ваш вихідний результат тут на сторінці:
+Протестуйте функцію за допомогою наступних вхідних даних, показавши вивід на цій сторінці:
 
 <ul>
   <li>[] # (без вхідних слів).</li>
@@ -30,7 +30,7 @@ dashedName: comma-quibbling
   <li>["ABC", "DEF", "G", "H"]</li>
 </ul>
 
-**Зверніть увагу:** Припустіть, що слова не є порожніми рядками у верхньому регістрі для цього завдання.
+**Примітка:** припускайте, що словами в цьому завданні є рядки у верхньому регістрі.
 
 # --hints--
 
@@ -40,31 +40,31 @@ dashedName: comma-quibbling
 assert(typeof quibble === 'function');
 ```
 
-Функція `quibble(["ABC"])` має повернути рядок.
+`quibble(["ABC"])` має повернути рядок.
 
 ```js
 assert(typeof quibble(['ABC']) === 'string');
 ```
 
-Функція `quibble([])` має повернути "{}".
+`quibble([])` має повернути `"{}"`.
 
 ```js
 assert.equal(quibble(testCases[0]), results[0]);
 ```
 
-Функція `quibble(["ABC"])` має повернути `"{ABC}"`.
+`quibble(["ABC"])` має повернути `"{ABC}"`.
 
 ```js
 assert.equal(quibble(testCases[1]), results[1]);
 ```
 
-Функція `quibble(["ABC", "DEF"])` має повернути `"{ABC and DEF}"`.
+`quibble(["ABC", "DEF"])` має повернути `"{ABC and DEF}"`.
 
 ```js
 assert.equal(quibble(testCases[2]), results[2]);
 ```
 
-Функція `quibble(["ABC", "DEF", "G", "H"])` має повернути `"{ABC, DEF, G and H}"`.
+`quibble(["ABC", "DEF", "G", "H"])` має повернути `"{ABC, DEF, G and H}"`.
 
 ```js
 assert.equal(quibble(testCases[3]), results[3]);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/compare-a-list-of-strings.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/compare-a-list-of-strings.md
index b0994451d09..cd9cf225788 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/compare-a-list-of-strings.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/compare-a-list-of-strings.md
@@ -1,6 +1,6 @@
 ---
 id: 596e457071c35c882915b3e4
-title: Порівняйте список рядків
+title: Порівняння списку рядків
 challengeType: 1
 forumTopicId: 302235
 dashedName: compare-a-list-of-strings
@@ -8,7 +8,7 @@ dashedName: compare-a-list-of-strings
 
 # --description--
 
-A list is an ordered set of values that may contain duplicates. Ось приклад:
+Список — це впорядкована множина значень, яка може містити дублікати. Ось приклад:
 
 ```js
 const list = [['AA',  'BB', 'CC'], ['AA', 'ACB', 'AA'], [], ['AA']];
@@ -29,67 +29,67 @@ Given a list of arbitrarily many strings, implement a function for each of the f
 assert(typeof allEqual === 'function');
 ```
 
-`azSorted` should be a function.
+`azSorted` має бути функцією.
 
 ```js
 assert(typeof azSorted === 'function');
 ```
 
-`allEqual(["AA", "AA", "AA", "AA"])` should return true.
+`allEqual(["AA", "AA", "AA", "AA"])` має повернути `true`.
 
 ```js
 assert(allEqual(testCases[0]));
 ```
 
-`azSorted(["AA", "AA", "AA", "AA"])` should return false.
+`azSorted(["AA", "AA", "AA", "AA"])` має повернути `false`.
 
 ```js
 assert(!azSorted(testCases[0]));
 ```
 
-`allEqual(["AA", "ACB", "BB", "CC"])` should return false.
+`allEqual(["AA", "ACB", "BB", "CC"])` має повернути `false`.
 
 ```js
 assert(!allEqual(testCases[1]));
 ```
 
-`azSorted(["AA", "ACB", "BB", "CC"])` should return true.
+`azSorted(["AA", "ACB", "BB", "CC"])` має повернути `true`.
 
 ```js
 assert(azSorted(testCases[1]));
 ```
 
-`allEqual([])` should return true.
+`allEqual([])` має повернути `true`.
 
 ```js
 assert(allEqual(testCases[2]));
 ```
 
-`azSorted([])` should return true.
+`azSorted([])` має повернути `true`.
 
 ```js
 assert(azSorted(testCases[2]));
 ```
 
-`allEqual(["AA"])` should return true.
+`allEqual(["AA"])` має повернути `true`.
 
 ```js
 assert(allEqual(testCases[3]));
 ```
 
-`azSorted(["AA"])` should return true.
+`azSorted(["AA"])` має повернути `true`.
 
 ```js
 assert(azSorted(testCases[3]));
 ```
 
-`allEqual(["BB", "AA"])` should return false.
+`allEqual(["BB", "AA"])` має повернути `false`.
 
 ```js
 assert(!allEqual(testCases[4]));
 ```
 
-`azSorted(["BB", "AA"])` should return false.
+`azSorted(["BB", "AA"])` має повернути `false`.
 
 ```js
 assert(!azSorted(testCases[4]));
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md
index ebc4361e341..20e4adb4bfe 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/convert-seconds-to-compound-duration.md
@@ -1,6 +1,6 @@
 ---
 id: 596fd036dc1ab896c5db98b1
-title: Convert seconds to compound duration
+title: Конвертація секунд в складену тривалість
 challengeType: 1
 forumTopicId: 302236
 dashedName: convert-seconds-to-compound-duration
@@ -8,14 +8,14 @@ dashedName: convert-seconds-to-compound-duration
 
 # --description--
 
-Implement a function which:
+Реалізуйте функцію, яка:
 
 <ul>
   <li>приймає натуральне число, яке представляє тривалість в секундах (наприклад, <code>100</code>), та</li>
   <li>повертає рядок тієї самої тривалості у вигляді тижнів, днів, годин, хвилин та секунд (наприклад, <code>1 min, 40 sec</code>).</li>
 </ul>
 
-Демонстрація того, що вона передає наступні три тестові випадки:
+Розглянемо три тестові випадки:
 
 <div style='font-size:115%; font-weight: bold;'>Тестові випадки</div>
 
@@ -28,25 +28,25 @@ Implement a function which:
 <div style="font-size:115%; font-weight: bold;">Деталі</div>
 <ul>
   <li>
-    The following five units should be used:
+    Використайте наступні п’ять одиниць:
 
-| Unit   | Suffix used in Output | Conversion            |
+| Одиниця   | Суфікс | Конвертація            |
 | ------ | --------------------- | --------------------- |
-| week   | <code>wk</code>       | 1 week = 7 days       |
-| day    | <code>d</code>        | 1 day = 24 hours      |
-| hour   | <code>hr</code>       | 1 hour = 60 minutes   |
-| minute | <code>min</code>      | 1 minute = 60 seconds |
-| second | <code>sec</code>      | ---                   |
+| тиждень   | <code>wk</code>       | 1 тиждень = 7 днів       |
+| день    | <code>d</code>        | 1 день = 24 години      |
+| година   | <code>hr</code>       | 1 година = 60 хвилин   |
+| хвилина | <code>min</code>      | 1 хвилина = 60 секунд |
+| секунда | <code>sec</code>      | ---                   |
 
   </li>
   <li>
-    Однак <strong>only</strong> містить кількість не нульових значень при виході (наприклад <code>1 d</code> а не <code>0 wk, 1 d, 0 hr, 0 min, 0 sec</code>).
+    Однак у вихідному числі використайте <strong>лише</strong> ті значення, які більші за нуль (наприклад, поверніть <code>1 d</code>, а не <code>0 wk, 1 d, 0 hr, 0 min, 0 sec</code>).
   </li>
   <li>
-    Надавати перевагу максимально великим одиницям над меншими одиницями (наприклад повернути <code>2 min, 10 sec</code> а не <code>1 min, 70 sec</code> чи <code>130 sec</code>).
+    Надавайте перевагу більшим одиницям над меншими (наприклад, поверніть <code>2 min, 10 sec</code>, а не <code>1 min, 70 sec</code> чи <code>130 sec</code>).
   </li>
   <li>
-    Мімікрійне форматування, показане у тестових випадках ( кількість відсортована від найбільшої одиниці до найменшої і відокремлена комою+пробілом; значення і одиниця всіх значень відділена пробілом).
+    Використайте те ж саме форматування, що й в тестових випадках (одиниці відсортовані від найбільшої до найменшої та розділені комою+пробілом; значення та одиниця розділені пробілом).
   </li>
 </ul>
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/count-occurrences-of-a-substring.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/count-occurrences-of-a-substring.md
index 1ac2f64b389..3f3eab5c7f9 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/count-occurrences-of-a-substring.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/count-occurrences-of-a-substring.md
@@ -1,6 +1,6 @@
 ---
 id: 596fda99c69f779975a1b67d
-title: Кількість входжень підрядка
+title: Частотність підрядка
 challengeType: 1
 forumTopicId: 302237
 dashedName: count-occurrences-of-a-substring
@@ -8,7 +8,7 @@ dashedName: count-occurrences-of-a-substring
 
 # --description--
 
-Create a function, or show a built-in function, to count the number of non-overlapping occurrences of a substring inside a string.
+Створіть функцію або покажіть вбудовану функцію, щоб підрахувати частотність підрядка (який не перетинається) в середині рядка.
 
 Функція має приймати два аргументи:
 
@@ -17,11 +17,11 @@ Create a function, or show a built-in function, to count the number of non-overl
   <li>другий аргумент є підрядком, який шукатимуть.</li>
 </ul>
 
-Вона має повертати ціле число.
+Вона має повернути ціле число.
 
-Відповідність повинна дати найбільшу кількість співпадінь, які не перекриваються.
+Сумісність має відповідати найбільшій кількості збігів, які не перетинаються.
 
-Загалом, це означає співпадіння з ліва на право або з права на ліво.
+Загалом це означає збіги зліва направо або справа наліво.
 
 # --hints--
 
@@ -31,19 +31,19 @@ Create a function, or show a built-in function, to count the number of non-overl
 assert(typeof countSubstring === 'function');
 ```
 
-`countSubstring("the three truths", "th")` має повертати `3`.
+`countSubstring("the three truths", "th")` має повернути `3`.
 
 ```js
 assert.equal(countSubstring(testCases[0], searchString[0]), results[0]);
 ```
 
-`countSubstring("ababababab", "abab")` має повертати `2`.
+`countSubstring("ababababab", "abab")` має повернути `2`.
 
 ```js
 assert.equal(countSubstring(testCases[1], searchString[1]), results[1]);
 ```
 
-`countSubstring("abaabba*bbaba*bbab", "a*b")` має повертати `2`.
+`countSubstring("abaabba*bbaba*bbab", "a*b")` має повернути `2`.
 
 ```js
 assert.equal(countSubstring(testCases[2], searchString[2]), results[2]);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/count-the-coins.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/count-the-coins.md
index 512e5257878..621dc1a603c 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/count-the-coins.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/count-the-coins.md
@@ -8,7 +8,7 @@ dashedName: count-the-coins
 
 # --description--
 
-There are four types of common coins in US currency:
+В грошовому обігу США є такі ходові монети:
 
 <ul>
   <li>чверті (25 центів)</li>
@@ -30,7 +30,7 @@ There are four types of common coins in US currency:
 
 # --instructions--
 
-Створіть функцію, яка буде визначати, скількома способами можна розміняти введену кількість `cents`, що представляє суму американських пенні, використовуючи ці поширені монети.
+Реалізуйте функцію, щоб визначити, скількома способами можна розміняти наданий ввід (`cents`), який представляє кількість пенні США, використовуючи ходові монети.
 
 # --hints--
 
@@ -40,19 +40,19 @@ There are four types of common coins in US currency:
 assert(typeof countCoins === 'function');
 ```
 
-`countCoins(15)` має повертати `6`.
+`countCoins(15)` має повернути `6`.
 
 ```js
 assert.equal(countCoins(15), 6);
 ```
 
-`countCoins(85)` повинен повертати `163`.
+`countCoins(85)` має повернути `163`.
 
 ```js
 assert.equal(countCoins(85), 163);
 ```
 
-`countCoins(100)` має повертати `242`.
+`countCoins(100)` має повернути `242`.
 
 ```js
 assert.equal(countCoins(100), 242);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cramers-rule.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cramers-rule.md
index 5d5178e362a..c308040962a 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cramers-rule.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cramers-rule.md
@@ -8,9 +8,9 @@ dashedName: cramers-rule
 
 # --description--
 
-<a href="https://rosettacode.org/wiki/Cramer%27s_rule" target="_blank" rel="noopener noreferrer nofollow">Cramer's rule</a> is a formula for solving a system of linear equations by using the determinants of matrices formed from subsets of the coefficients and right hand side values.
+<a href="https://rosettacode.org/wiki/Cramer%27s_rule" target="_blank" rel="noopener noreferrer nofollow">Метод Крамера</a> — це формула для розв’язку системи лінійних рівнянь за допомогою визначників матриць, утворених з підмножин коефіцієнтів та значень з правої частини.
 
-Визначник матриці з 2 рядками та двома стовпцями визначається як:
+Визначник матриць з двома рядками та двома стовпцями задано виразом:
 
 $\begin{aligned}|A|={\begin{vmatrix}a&b\\\c&d\end{vmatrix}}=ad-bc.\end{aligned}$
 
@@ -18,21 +18,21 @@ $\begin{aligned}|A|={\begin{vmatrix}a&b\\\c&d\end{vmatrix}}=ad-bc.\end{aligned}$
 
 $\\left\\{\\begin{matrix}a_1x + b_1y + c_1z&= {\\color{red}d_1}\\\\a_2x + b_2y + c_2z&= {\\color{red}d_2}\\\\a_3x + b_3y + c_3z&= {\\color{red}d_3}\\end{matrix}\\right.$
 
-яка є у форматі матриці
+Система у форматі матриці:
 
 $\\begin{bmatrix} a_1 & b_1 & c_1 \\\\ a_2 & b_2 & c_2 \\\\ a_3 & b_3 & c_3 \\end{bmatrix}\\begin{bmatrix} x \\\\ y \\\\ z \\end{bmatrix}=\\begin{bmatrix} {\\color{red}d_1} \\\\ {\\color{red}d_2} \\\\ {\\color{red}d_3} \\end{bmatrix}.$
 
-Тоді значення $x, y$ та $z$ можна знайти так:
+Тому значення $x, y$ та $z$ можна знайти наступним чином:
 
-$x = \\frac{\\begin{vmatrix} {\\color{red}d_1} & b_1 & c_1 \\\\ {\\color{red}d_2} & b_2 & c_2 \\\\ {\\color{red}d_3} & b_3 & c_3 \\end{vmatrix} } { \\begin{vmatrix} a_1 & b_1 & c_1 \\\\ a_2 & b_2 & c_2 \\\\ a_3 & b_3 & c_3 \\end{vmatrix}}, \\quad y = \\frac {\\begin{vmatrix} a_1 & {\\color{red}d_1} & c_1 \\\\ a_2 & {\\color{red}d_2} & c_2 \\\\ a_3 & {\\color{red}d_3} & c_3 \\end{vmatrix}} {\\begin{vmatrix} a_1 & b_1 & c_1 \\\\ a_2 & b_2 & c_2 \\\\ a_3 & b_3 & c_3 \\end{vmatrix}}, \\text{ та }z = \\frac { \\begin{vmatrix} a_1 & b_1 & {\\color{red}d_1} \\\\ a_2 & b_2 & {\\color{red}d_2} \\\\ a_3 & b_3 & {\\color{red}d_3} \\end{vmatrix}} {\\begin{vmatrix} a_1 & b_1 & c_1 \\\\ a_2 & b_2 & c_2 \\\\ a_3 & b_3 & c_3 \\end{vmatrix} }.$
+$x = \\frac{\\begin{vmatrix} {\\color{red}d_1} & b_1 & c_1 \\\\ {\\color{red}d_2} & b_2 & c_2 \\\\ {\\color{red}d_3} & b_3 & c_3 \\end{vmatrix} } { \\begin{vmatrix} a_1 & b_1 & c_1 \\\\ a_2 & b_2 & c_2 \\\\ a_3 & b_3 & c_3 \\end{vmatrix}}, \\quad y = \\frac {\\begin{vmatrix} a_1 & {\\color{red}d_1} & c_1 \\\\ a_2 & {\\color{red}d_2} & c_2 \\\\ a_3 & {\\color{red}d_3} & c_3 \\end{vmatrix}} {\\begin{vmatrix} a_1 & b_1 & c_1 \\\\ a_2 & b_2 & c_2 \\\\ a_3 & b_3 & c_3 \\end{vmatrix}} \\text{ та }z = \\frac { \\begin{vmatrix} a_1 & b_1 & {\\color{red}d_1} \\\\ a_2 & b_2 & {\\color{red}d_2} \\\\ a_3 & b_3 & {\\color{red}d_3} \\end{vmatrix}} {\\begin{vmatrix} a_1 & b_1 & c_1 \\\\ a_2 & b_2 & c_2 \\\\ a_3 & b_3 & c_3 \\end{vmatrix} }.$
 
 # --instructions--
 
-Враховуючи таку систему рівнянь:
+Дано наступну систему рівнянь:
 
 $\\begin{cases} 2w-x+5y+z=-3 \\\\ 3w+2x+2y-6z=-32 \\\\ w+3x+3y-z=-47 \\\\ 5w-2x-3y+3z=49 \\\\ \\end{cases}$
 
-розв’язок для $w$, $x$, $y$ та $z$, використовуючи правило Крамера.
+Знайдіть $w$, $x$, $y$ та $z$, використовуючи метод Крамера.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cumulative-standard-deviation.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cumulative-standard-deviation.md
index bb1b99a57f8..4b2d1b9bb8d 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cumulative-standard-deviation.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cumulative-standard-deviation.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7e03
-title: Сукупне стандартне відхилення
+title: Cumulative standard deviation
 challengeType: 1
 forumTopicId: 302240
 dashedName: cumulative-standard-deviation
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cusip.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cusip.md
index 546068d5657..9f836903dd3 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cusip.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cusip.md
@@ -8,11 +8,11 @@ dashedName: cusip
 
 # --description--
 
-A **CUSIP** is a nine-character alphanumeric code that identifies a North American financial security for the purposes of facilitating clearing and settlement of trades. The CUSIP was adopted as an American National Standard under Accredited Standards X9.6.
+**CUSIP** — це дев’ятизначний буквено-цифровий код, який ідентифікує північноамериканську фінансову безпеку з метою сприяння клірингу і врегулювання фінансових угод. CUSIP був прийнятий як американський національний стандарт відповідно до акредитованих стандартів X9.6.
 
 # --instructions--
 
-Запишіть функцію, яка приймає рядок в якості параметра і перевіряє, чи дійсний рядок CUSIP.
+Напишіть функцію, яка приймає рядок як параметр та перевіряє, чи цей рядок є дійсним CUSIP.
 
 # --hints--
 
@@ -22,55 +22,55 @@ A **CUSIP** is a nine-character alphanumeric code that identifies a North Americ
 assert(typeof isCusip == 'function');
 ```
 
-`isCusip("037833100")` має повертати логічний тип даних.
+`isCusip("037833100")` має повернути булеве значення.
 
 ```js
 assert(typeof isCusip('037833100') == 'boolean');
 ```
 
-`isCusip("037833100")` має повертати `true`.
+`isCusip("037833100")` має повернути `true`.
 
 ```js
 assert.equal(isCusip('037833100'), true);
 ```
 
-`isCusip("17275R102")` має повертати `true`.
+`isCusip("17275R102")` має повернути `true`.
 
 ```js
 assert.equal(isCusip('17275R102'), true);
 ```
 
-`isCusip("38259P50a")` має повертати `false`.
+`isCusip("38259P50a")` має повернути `false`.
 
 ```js
 assert.equal(isCusip('38259P50a'), false);
 ```
 
-`isCusip("38259P508")` має повертати `true`.
+`isCusip("38259P508")` має повернути `true`.
 
 ```js
 assert.equal(isCusip('38259P508'), true);
 ```
 
-`isCusip("38259P50#")` має повертати `false`.
+`isCusip("38259P50#")` має повернути `false`.
 
 ```js
 assert.equal(isCusip('38259P50#'), false);
 ```
 
-`isCusip("68389X105")` має повертати `true`.
+`isCusip("68389X105")` має повернути `true`.
 
 ```js
 assert.equal(isCusip('68389X105'), true);
 ```
 
-`isCusip("68389X106")` має повертати `false`.
+`isCusip("68389X106")` має повернути `false`.
 
 ```js
 assert.equal(isCusip('68389X106'), false);
 ```
 
-`isCusip("5949181")` має повертати `false`.
+`isCusip("5949181")` має повернути `false`.
 
 ```js
 assert.equal(isCusip('5949181'), false);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cut-a-rectangle.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cut-a-rectangle.md
index e7867bac830..33eaad76c31 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cut-a-rectangle.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/cut-a-rectangle.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7e06
-title: Cut a rectangle
+title: Розрізання прямокутника
 challengeType: 1
 forumTopicId: 302242
 dashedName: cut-a-rectangle
@@ -8,7 +8,7 @@ dashedName: cut-a-rectangle
 
 # --description--
 
-A given rectangle is made from *m* × *n* squares. If *m* and *n* are not both odd, then it is possible to cut a path through the rectangle along the square edges such that the rectangle splits into two connected pieces with the same shape (after rotating one of the pieces by 180°). All such paths for 2 × 2 and 4 × 3 rectangles are shown below.
+Даний прямокутник складається з квадратів *m* × *n*. За умови, що *m* та *n* не можуть бути обидва непарними числами, то прямокутник можна розрізати вздовж квадратних країв так, щоб утворились дві однакові фігури (якщо розвернути одну з них на 180°). Всі такі розрізи для прямокутників 2×2 та 4×3 показано нижче.
 
 <div style="width: 100%; text-align: center;">
   <svg xmlns="https://www.w3.org/2000/svg" xmlns:xlink="https://www.w3.org/1999/xlink" width="520" height="170" aria-hidden="true" alt="Diagram showing the possible paths for 2 by 2 and 4 by 3 rectangles">
@@ -92,7 +92,7 @@ A given rectangle is made from *m* × *n* squares. If *m* and *n* are not both o
 
 # --instructions--
 
-Запишіть функцію, яка обчислює кількість різних способів поділити прямокутник *m* × *n*.
+Напишіть функцію, яка розраховує скількома способами можна розрізати прямокутник *m* × *n*.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/date-format.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/date-format.md
index 82579f6b8a3..54fd98177d1 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/date-format.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/date-format.md
@@ -8,7 +8,7 @@ dashedName: date-format
 
 # --description--
 
-Return an array with two date strings of the current date with the following specifications:
+Поверніть масив з двома рядками поточної дати відповідно до опису нижче:
 
 - Дата в першому рядку повинна мати такий порядок: рік, місяць, день (розділені рискою `-`).
 - Рік в першому рядку має складатись з чотирьох цифр.
@@ -16,7 +16,7 @@ Return an array with two date strings of the current date with the following spe
 - Не скорочуйте назви дня та місяця в другому рядку.
 - День в другому рядку не може починатися з нуля.
 
-Приклад кінцевого результату:
+Приклад виводу:
 
 ```js
 ['2007-11-23', 'Friday, November 23, 2007']
@@ -31,19 +31,19 @@ Return an array with two date strings of the current date with the following spe
 assert(typeof getDateFormats === 'function');
 ```
 
-`getDateFormats` має повернути об'єкт.
+`getDateFormats` має повернути об’єкт.
 
 ```js
 assert(typeof getDateFormats() === 'object');
 ```
 
-`getDateFormats` повинен повернути масив з 2 елементами.
+`getDateFormats` має повернути масив з 2 елементами.
 
 ```js
 assert(getDateFormats().length === 2);
 ```
 
-`getDateFormats` має повернути правильну дату в правильному форматі
+`getDateFormats` має повернути правильну дату в правильному форматі.
 
 ```js
 assert.deepEqual(getDateFormats(), dates, equalsMessage);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/date-manipulation.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/date-manipulation.md
index 596d8b261c6..302f015306e 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/date-manipulation.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/date-manipulation.md
@@ -1,6 +1,6 @@
 ---
 id: 5966c21cf732a95f1b67dd28
-title: Зміна дати
+title: Маніпуляція датою
 challengeType: 1
 forumTopicId: 302244
 dashedName: date-manipulation
@@ -8,11 +8,11 @@ dashedName: date-manipulation
 
 # --description--
 
-Given a date string in EST, output the given date as a string with 12 hours added to the time. Time zone should be preserved.
+Дано рядок з датою в EST. Виведіть надану дату як рядок, додавши 12 годин до часу. Не змінюйте часовий пояс.
 
-Приклад заданого формату: `"March 6 2009 7:30pm EST"`
+Приклад вводу: `"March 6 2009 7:30pm EST"`
 
-Приклад вихідного формату: `"March 7 2009 7:30am EST"`
+Приклад виводу: `"March 7 2009 7:30am EST"`
 
 # --hints--
 
@@ -28,7 +28,7 @@ assert(typeof add12Hours === 'function');
 assert(typeof add12Hours('January 17 2017 11:43am EST') === 'string');
 ```
 
-`add12Hours("January 17 2017 11:43am EST")` має видати `"January 17 2017 11:43pm EST"`
+`add12Hours("January 17 2017 11:43am EST")` має повернути `"January 17 2017 11:43pm EST"`
 
 ```js
 assert(
@@ -36,25 +36,25 @@ assert(
 );
 ```
 
-Необхідна зміна дня. `add12Hours("March 6 2009 7:30pm EST")` має видати `"March 7 2009 7:30am EST"`
+Необхідна зміна дня. `add12Hours("March 6 2009 7:30pm EST")` має повернути `"March 7 2009 7:30am EST"`
 
 ```js
 assert(add12Hours('March 6 2009 7:30pm EST') === 'March 7 2009 7:30am EST');
 ```
 
-Необхідна зміна місяця у високосний рік. `add12Hours("February 29 2004 9:15pm EST")` має видати `"March 1 2004 9:15am EST"`
+Необхідна зміна місяця у високосний рік. `add12Hours("February 29 2004 9:15pm EST")` має повернути `"March 1 2004 9:15am EST"`
 
 ```js
 assert(add12Hours('February 29 2004 9:15pm EST') === 'March 1 2004 9:15am EST');
 ```
 
-Необхідна зміна місяця у звичайні роки. `add12Hours("February 28 1999 3:15pm EST")` має видати `"March 1 1999 3:15am EST"`
+Необхідна зміна місяця у звичайні роки. `add12Hours("February 28 1999 3:15pm EST")` має повернути `"March 1 1999 3:15am EST"`
 
 ```js
 assert(add12Hours('February 28 1999 3:15pm EST') === 'March 1 1999 3:15am EST');
 ```
 
-Необхідна зміна року. `add12Hours("December 31 2020 1:45pm EST")` має видати `"January 1 2021 1:45am EST"`
+Необхідна зміна року. `add12Hours("December 31 2020 1:45pm EST")` має повернути `"January 1 2021 1:45am EST"`
 
 ```js
 assert(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/day-of-the-week.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/day-of-the-week.md
index f31e200c714..adb352645e6 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/day-of-the-week.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/day-of-the-week.md
@@ -8,11 +8,11 @@ dashedName: day-of-the-week
 
 # --description--
 
-A company decides that whenever Xmas falls on a Sunday they will give their workers all extra paid holidays so that, together with any public holidays, workers will not have to work the following week (between the 25th of December and the first of January).
+Компанія вирішила: якщо Різдво випадає на неділю, то працівники отримають додаткові оплачувані відпустки та, відповідно, не працюватимуть наступний тиждень (від 25 грудня до 1 січня).
 
 # --instructions--
 
-Напишіть функцію, яка потребує роки початку і кінця відліку, щоб видати масив з усіма роками, коли 25 грудня припадає на неділю.
+Напишіть функцію, яка приймає початковий і кінцевий роки та повертає масив всіх років, коли 25 грудня випадає на неділю.
 
 # --hints--
 
@@ -22,19 +22,19 @@ A company decides that whenever Xmas falls on a Sunday they will give their work
 assert(typeof findXmasSunday === 'function');
 ```
 
-`findXmasSunday(2000, 2100)` має видати масив.
+`findXmasSunday(2000, 2100)` має повернути масив.
 
 ```js
 assert(typeof findXmasSunday(2000, 2100) === 'object');
 ```
 
-`findXmasSunday(1970, 2017)` має видати `[1977, 1983, 1988, 1994, 2005, 2011, 2016]`
+`findXmasSunday(1970, 2017)` має повернути `[1977, 1983, 1988, 1994, 2005, 2011, 2016]`
 
 ```js
 assert.deepEqual(findXmasSunday(1970, 2017), firstSolution);
 ```
 
-`findXmasSunday(2008, 2121)` має видати `[2011, 2016, 2022, 2033, 2039, 2044, 2050, 2061, 2067, 2072, 2078, 2089, 2095, 2101, 2107, 2112, 2118]`
+`findXmasSunday(2008, 2121)` має повернути `[2011, 2016, 2022, 2033, 2039, 2044, 2050, 2061, 2067, 2072, 2078, 2089, 2095, 2101, 2107, 2112, 2118]`
 
 ```js
 assert.deepEqual(findXmasSunday(2008, 2121), secondSolution);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
index 9e259cdb009..8762d7caa2e 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/deal-cards-for-freecell.md
@@ -1,6 +1,6 @@
 ---
 id: 59694356a6e7011f7f1c5f4e
-title: Роздати карти для FreeCell
+title: Deal cards for FreeCell
 challengeType: 1
 forumTopicId: 302246
 dashedName: deal-cards-for-freecell
@@ -26,13 +26,13 @@ dashedName: deal-cards-for-freecell
   <li>Seed the RNG with the number of the deal.
   </li><li>Створіть масив з 52 карт: туз трефи, туз бубни, туз чирви, туз піки, двійка трефи, двійка бубни і т. д. по усім рангам: Туз, 2, 3, 4, 5, 6, 7, 8, 9, 10, Валет, Дама, Король. Індекси масивів від 0 до 51, з тузом трефи на 0 та королем піки на 51.</li>
   <li>Поки масив не стане пустим:</li>
-  <li>Оберіть випадкову карту із індексом ≡ наступне випадкове число (довжина масиву модулів).</li>
     <ul>
+      <li>Choose a random card at <i>index</i> ≡ <i>next random number</i> (mod <i>array length</i>).</li>
       <li>Swap this random card with the last card of the array.</li>
-      <li>Видаліть цю випадкову карту із масиву. (Довжина масиву зменшується на 1.)</li>
-      <li>Роздайте цю випадкову карту.</li>
+      <li>Remove this random card from the array. (Array length goes down by 1.)</li>
+      <li>Deal this random card.</li>
     </ul>
-  <li>Роздайте усі 52 карти, лицем догори, на 8 стовпчиків. Перші 8 карт на 8 стовпчиків, наступні 8 карт на перші 8 карт, і так далі.</li>
+  <li>Deal all 52 cards, face up, across 8 columns. The first 8 cards go in 8 columns, the next 8 cards go on the first 8 cards, and so on.</li>
 </ol>
 
 **Наприклад:**
@@ -47,7 +47,7 @@ dashedName: deal-cards-for-freecell
 41 42 43 44 45 46 47 48
 49 50 51 52</pre>
 
-**Гра #1**
+**Game #1**
 
 ```js
 [
@@ -61,7 +61,7 @@ dashedName: deal-cards-for-freecell
 ]
 ```
 
-**Гра #617**
+**Game #617**
 
 ```js
 [
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/deepcopy.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/deepcopy.md
index b1318e4908c..efa18bdc75a 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/deepcopy.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/deepcopy.md
@@ -1,6 +1,6 @@
 ---
 id: 596a8888ab7c01048de257d5
-title: Deepcopy (Глибоке копіювання)
+title: Глибока копія
 challengeType: 1
 forumTopicId: 302247
 dashedName: deepcopy
@@ -8,9 +8,9 @@ dashedName: deepcopy
 
 # --description--
 
-Write a function that returns a deep copy of a given object. The copy must not be the same object that was given.
+Напишіть функцію, яка повертає глибоку копію заданого об’єкта. Копія не повинна бути такою самою, як заданий об’єкт.
 
-Це завдання не буде перевірятися для:
+Це завдання не тестуватиме:
 
 <ul>
   <li>Об’єкти з властивостями, які є функціями</li>
@@ -27,25 +27,25 @@ Write a function that returns a deep copy of a given object. The copy must not b
 assert(typeof deepcopy === 'function');
 ```
 
-`deepcopy({test: "test"})` має повертати об'єкт.
+`deepcopy({test: "test"})` має повернути об’єкт.
 
 ```js
 assert(typeof deepcopy(obj1) === 'object');
 ```
 
-`deepcopy` не має повертати той самий об'єкт, який був заданий.
+`deepcopy` не має повертати той самий об’єкт, який був заданий.
 
 ```js
 assert(deepcopy(obj2) != obj2);
 ```
 
-Під час переходу об'єкта, який містить масив, `deepcopy` має повертати глибоку копію об'єкта.
+Якщо передано об’єкт, який містить масив, то `deepcopy` має повернути глибоку копію об’єкта.
 
 ```js
 assert.deepEqual(deepcopy(obj2), obj2);
 ```
 
-Під час переходу об'єкта, який містить інший об'єкт, `deepcopy` має повертати глибоку копію об'єкта.
+Якщо передано об’єкт, який містить інший об’єкт, то `deepcopy` має повернути глибоку копію об’єкта.
 
 ```js
 assert.deepEqual(deepcopy(obj3), obj3);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/define-a-primitive-data-type.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/define-a-primitive-data-type.md
index 6c42df51ac5..3df84198ca3 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/define-a-primitive-data-type.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/define-a-primitive-data-type.md
@@ -8,7 +8,7 @@ dashedName: define-a-primitive-data-type
 
 # --description--
 
-Define a type that behaves like an integer but has a lowest valid value of 1 and a highest valid value of 10.
+Визначте тип, який поводиться як ціле число, але має найменше допустиме значення 1 та найбільше допустиме значення 10.
 
 Обробка помилок:
 
@@ -25,37 +25,37 @@ Define a type that behaves like an integer but has a lowest valid value of 1 and
 assert(typeof Num === 'function');
 ```
 
-`new Num(4)` має повертати об'єкт.
+`new Num(4)` має повернути об’єкт.
 
 ```js
 assert(typeof new Num(4) === 'object');
 ```
 
-`new Num('test')` має видавати помилку TypeError з повідомленням 'Not a Number'.
+`new Num('test')` має видати TypeError з повідомленням 'Not a Number'.
 
 ```js
 assert.throws(() => new Num('test'), TypeError);
 ```
 
-`new Num(0)` має видавати помилку TypeError з повідомленням 'Out of range'.
+`new Num(0)` має видати TypeError з повідомленням 'Out of range'.
 
 ```js
 assert.throws(() => new Num(0), TypeError);
 ```
 
-`new Num(-5)` має видавати помилку TypeError з повідомленням 'Out of range'.
+`new Num(-5)` має видати TypeError з повідомленням 'Out of range'.
 
 ```js
 assert.throws(() => new Num(-5), TypeError);
 ```
 
-`new Num(10)` має видавати помилку TypeError з повідомленням 'Out of range'.
+`new Num(10)` має видати TypeError з повідомленням 'Out of range'.
 
 ```js
 assert.throws(() => new Num(11), TypeError);
 ```
 
-`new Num(20)` має видавати помилку TypeError з повідомленням 'Out of range'.
+`new Num(20)` має видати TypeError з повідомленням 'Out of range'.
 
 ```js
 assert.throws(() => new Num(20), TypeError);
@@ -85,19 +85,19 @@ assert.equal(new Num(3) * new Num(4), 12);
 assert.equal(new Num(3) / new Num(4), 0.75);
 ```
 
-`new Num(3) < new Num(4)` має бути правдою.
+`new Num(3) < new Num(4)` має бути істиною.
 
 ```js
 assert(new Num(3) < new Num(4));
 ```
 
-`new Num(3) > new Num(4)` має бути помилкою.
+`new Num(3) > new Num(4)` має бути хибою.
 
 ```js
 assert(!(new Num(3) > new Num(4)));
 ```
 
-`(new Num(5)).toString()` має повертати '5'
+`(new Num(5)).toString()` має повернути '5'.
 
 ```js
 assert.equal(new Num(5).toString(), '5');
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/department-numbers.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/department-numbers.md
index d08c6c5bfb1..1f37d01cdb3 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/department-numbers.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/department-numbers.md
@@ -1,6 +1,6 @@
 ---
 id: 59f40b17e79dbf1ab720ed7a
-title: Номери відділів
+title: Числа органів
 challengeType: 1
 forumTopicId: 302249
 dashedName: department-numbers
@@ -8,7 +8,7 @@ dashedName: department-numbers
 
 # --description--
 
-There is a highly organized city that has decided to assign a number to each of their departments:
+Існує високо організоване місто, яке вирішило призначити число до кожного зі своїх органів:
 
 <ul>
   <li>Поліція</li>
@@ -16,11 +16,11 @@ There is a highly organized city that has decided to assign a number to each of
   <li>Пожежна охорона</li>
 </ul>
 
-Кожен відділ може мати номер від 1 до 7 (включно).
+Кожен орган може отримати число від 1 до 7 (включно).
 
-Номери кожного з відділу мають бути унікальними (тобто бути відмінними одне від одного) та щоб в сумі було до номера 12.
+Числа всіх трьох органів мають бути унікальними (тобто відрізнятись) та в сумі дорівнювати 12.
 
-Шеф поліції не любить непарних чисел і хоче мати парне число для свого відділу.
+Голова поліції не любить непарні числа, тому хоче, щоб поліція мала парне число.
 
 # --instructions--
 
@@ -42,19 +42,19 @@ There is a highly organized city that has decided to assign a number to each of
 assert(typeof combinations === 'function');
 ```
 
-`combinations([1, 2, 3], 6)` повинні повернути масив.
+`combinations([1, 2, 3], 6)` має повернути масив.
 
 ```js
 assert(Array.isArray(combinations([1, 2, 3], 6)));
 ```
 
-`combinations([1, 2, 3, 4, 5, 6, 7], 12)` мають повернутися як рядок довжиною 14.
+`combinations([1, 2, 3, 4, 5, 6, 7], 12)` має повернути масив довжиною 14.
 
 ```js
 assert(combinations(nums, total).length === len);
 ```
 
-`combinations([1, 2, 3, 4, 5, 6, 7], 12)` повинен повертати всі дійсні комбінації.
+`combinations([1, 2, 3, 4, 5, 6, 7], 12)` має повернути всі дійсні комбінації.
 
 ```js
 assert.deepEqual(combinations(nums, total), result);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/discordian-date.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/discordian-date.md
index 10d7c229ce7..11b3412e18a 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/discordian-date.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/discordian-date.md
@@ -7,25 +7,25 @@ dashedName: discordian-date
 ---
 
 # --description--
-The Gregorian calendar is a solar calendar with 12 months of 28-31 days each. A week consists of seven days, and there are 52 weeks and 1 day per year. The year consists of 365 days with a leap day added to February every leap year. A leap year occurs every four years, except for the first three centurial years of every 400 years.
+Григоріанський календар — це сонячний календар з 12 місяцями по 28-31 день кожен. Тиждень складається з семи днів, а в році 52 тижні та 1 день. Рік складається з 365 днів, а кожного високосного року до лютого додається один день. Високосний рік настає кожні чотири роки, за винятком перших трьох столітніх років кожні 400 років.
 
-<a href="http://www.rosettacode.org/wiki/Discordian_date" target="_blank" rel="noopener noreferrer nofollow">Дискордіанський календар</a> узгоджується з Григоріанським календарем, та починається 1 січня. Тиждень складається з п’яти днів і у році 73 тижні. Рік також складається з 365 днів, додатковий день вставляється між Хаосом 59 і Хаосом 60 кожного високосного року.
+<a href="http://www.rosettacode.org/wiki/Discordian_date" target="_blank" rel="noopener noreferrer nofollow">Дискордіанський календар</a> паралельний григоріанському календарю і починається 1 січня. Тиждень складається з п’яти днів, а в році 73 тижні. Рік також складається з 365 днів, а додатковий день вставляється між 59 хаосом і 60 хаосом кожного високосного року.
 
-Місяці, дні тижня, дні Апостолів та Свята в Дискордіанському календарі представлено:
+Місяці, дні тижня, дні Апостолів та свята в дискордіанському календарі:
 
 Пори року: `'Chaos', 'Discord', 'Confusion', 'Bureaucracy', 'The Aftermath'`.
 
 Дні тижня: `'Sweetmorn', 'Boomtime', 'Pungenday', 'Prickle-Prickle', 'Setting Orange'`.
 
-Апостол: `'Mungday', 'Mojoday', 'Syaday', 'Zaraday', 'Maladay'`.
+Апостоли: `'Mungday', 'Mojoday', 'Syaday', 'Zaraday', 'Maladay'`.
 
 Свята: `'Chaoflux', 'Discoflux', 'Confuflux', 'Bureflux', 'Afflux'`.
 
 # --instructions--
 
-Перетворіть певну дату з григоріанського календаря на дискордіанський.
+Перетворіть певну дату за григоріанським календарем на дискордіанський.
 
-Зауважте, що день 1 Хаосу 3188 РДР за Дискордіанським календарем є днем 1 Січня 2022 року за Григоріанським календарем.
+Зверніть увагу, що 1 хаос, 3188 YOLD за дискордіанським календарем відповідає 1 січню, 2022 року за григоріанським календарем.
 
 # --hints--
 
@@ -35,7 +35,7 @@ The Gregorian calendar is a solar calendar with 12 months of 28-31 days each. A
 assert(typeof discordianDate === 'function');
 ```
 
-`discordianDate(new Date(2010, 6, 22))` повинен повертати `"Pungenday, the 57th day of Confusion in the YOLD 3176"`.
+`discordianDate(new Date(2010, 6, 22))` має повернути `"Pungenday, the 57th day of Confusion in the YOLD 3176"`.
 
 ```js
 assert(
@@ -44,7 +44,7 @@ assert(
 );
 ```
 
-`discordianDate(new Date(2012, 1, 28))` повинен повертати `"Prickle-Prickle, the 59th day of Chaos in the YOLD 3178"`.
+`discordianDate(new Date(2012, 1, 28))` має повернути `"Prickle-Prickle, the 59th day of Chaos in the YOLD 3178"`.
 
 ```js
 assert(
@@ -53,7 +53,7 @@ assert(
 );
 ```
 
-`discordianDate(new Date(2012, 1, 29))` should return `"Setting Orange, the 60th day of Chaos in the YOLD 3178. Celebrate St. Tib\'s Day!"`.
+`discordianDate(new Date(2012, 1, 29))` має повернути `"Setting Orange, the 60th day of Chaos in the YOLD 3178. Celebrate St. Tib\'s Day!"`.
 
 ```js
 assert(
@@ -62,7 +62,7 @@ assert(
 );
 ```
 
-`discordianDate(new Date(2012, 2, 1))` повинен повертати `"Setting Orange, the 60th day of Chaos in the YOLD 3178"`.
+`discordianDate(new Date(2012, 2, 1))` має повернути `"Setting Orange, the 60th day of Chaos in the YOLD 3178"`.
 
 ```js
 assert(
@@ -71,7 +71,7 @@ assert(
 );
 ```
 
-`discordianDate(new Date(2010, 0, 5))` should return `"Setting Orange, the 5th day of Chaos in the YOLD 3176. Celebrate Mungday!"`.
+`discordianDate(new Date(2010, 0, 5))` має повернути `"Setting Orange, the 5th day of Chaos in the YOLD 3176. Celebrate Mungday!"`.
 
 ```js
 assert(
@@ -80,7 +80,7 @@ assert(
 );
 ```
 
-`discordianDate(new Date(2011, 4, 3))` should return `"Pungenday, the 50th day of Discord in the YOLD 3177. Celebrate Discoflux!"`.
+`discordianDate(new Date(2011, 4, 3))` має повернути `"Pungenday, the 50th day of Discord in the YOLD 3177. Celebrate Discoflux!"`.
 
 ```js
 assert(
@@ -89,7 +89,7 @@ assert(
 );
 ```
 
-`discordianDate(new Date(2015, 9, 19))` повинен повертати `"Boomtime, the 73rd day of Bureaucracy in the YOLD 3181"`.
+`discordianDate(new Date(2015, 9, 19))` має повернути `"Boomtime, the 73rd day of Bureaucracy in the YOLD 3181"`.
 
 ```js
 assert(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/dot-product.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/dot-product.md
index 35466049ef6..e6f5c1f20f9 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/dot-product.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/dot-product.md
@@ -8,7 +8,7 @@ dashedName: dot-product
 
 # --description--
 
-Create a function, to compute the **dot product**, also known as the **scalar product** of two vectors.
+Створіть функцію, щоб обчислити **скалярний добуток** двох векторів.
 
 # --hints--
 
@@ -18,7 +18,7 @@ Create a function, to compute the **dot product**, also known as the **scalar pr
 assert(typeof dotProduct == 'function');
 ```
 
-`dotProduct([1, 3, -5], [4, -2, -1])` має повертатись як число.
+`dotProduct([1, 3, -5], [4, -2, -1])` має повернути число.
 
 ```js
 assert(typeof dotProduct([1, 3, -5], [4, -2, -1]) == 'number');
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/element-wise-operations.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/element-wise-operations.md
index 7e78e60ac5c..2f3393b48b9 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/element-wise-operations.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/element-wise-operations.md
@@ -1,6 +1,6 @@
 ---
 id: 599c333915e0ea32d04d4bec
-title: Операції Element-wise
+title: Поелементні операції
 challengeType: 1
 forumTopicId: 302252
 dashedName: element-wise-operations
@@ -8,9 +8,9 @@ dashedName: element-wise-operations
 
 # --description--
 
-Implement basic element-wise matrix-matrix and scalar-matrix operations.
+Реалізуйте базові поелементні операції для матриць та скалярів.
 
-**Виконайте:**
+**Реалізуйте:**
 
 <ul>
   <li>додавання</li>
@@ -20,7 +20,7 @@ Implement basic element-wise matrix-matrix and scalar-matrix operations.
   <li>піднесення до степеня</li>
 </ul>
 
-Перший параметр буде виконувати операцію "m_add" для додавання матриці та "s_add" для скалярного додавання. Другий і третій параметри будуть матрицями, на яких повинні виконуватися дії.
+Першим параметром буде операція, яку потрібно виконати: наприклад, "m_add" для додавання матриці та "s_add" для додавання скаляра. Другим та третім параметрами будуть матриці, над якими виконуватимуться операції.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/emirp-primes.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/emirp-primes.md
index 6cec6322b58..c7ccdc4b34c 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/emirp-primes.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/emirp-primes.md
@@ -1,6 +1,6 @@
 ---
 id: 599d0ba974141b0f508b37d5
-title: Emirp primes (Прості числа Емірпа)
+title: Ітсорп числа
 challengeType: 1
 forumTopicId: 302253
 dashedName: emirp-primes
@@ -8,7 +8,7 @@ dashedName: emirp-primes
 
 # --description--
 
-An emirp (**prime** spelled backwards) are primes that when reversed (in their decimal representation) are a different prime.
+Ітсорп числа (**прості** у зворотньому порядку) — це прості числа, які утворюють інші прості числа при записі задом наперед.
 
 # --instructions--
 
@@ -21,7 +21,7 @@ An emirp (**prime** spelled backwards) are primes that when reversed (in their d
   <li>Показує <code>n<sup>-не</sup></code> ітсорп число.</li>
 </ul>
 
-Функція повинна приймати два параметри. Перший отримає `n` або діапазон у вигляді масиву. Другий отримає логічний тип, що вказує, чи повертається функція emirps у вигляді масиву або окремого числа (кількість простих чисел у діапазоні або просте число <code>n<sup>th</sup></code>). Відповідно до параметрів функція повинна повертати масив або число.
+Функція повинна приймати два параметри. Перший отримає `n` або діапазон у вигляді масиву. Другий отримає булеве значення, яке вказує, чи функція повертає ітсорп як масив чи окреме число (кількість простих чисел в діапазоні або <code>n<sup>-не</sup></code> просте число). Відповідно до параметрів функція має повернути масив або число.
 
 # --hints--
 
@@ -31,7 +31,7 @@ An emirp (**prime** spelled backwards) are primes that when reversed (in their d
 assert(typeof emirps === 'function');
 ```
 
-`emirps(20,true)` повинен повертатися як `[13,17,31,37,71,73,79,97,107,113,149,157,167,179,199,311,337,347,359,389]`
+`emirps(20,true)` має повернути `[13,17,31,37,71,73,79,97,107,113,149,157,167,179,199,311,337,347,359,389]`
 
 ```js
 assert.deepEqual(emirps(20, true), [
@@ -58,13 +58,13 @@ assert.deepEqual(emirps(20, true), [
 ]);
 ```
 
-`emirps(1000)` повинен повертатися як `70529`
+`emirps(1000)` має повернути `70529`
 
 ```js
 assert.deepEqual(emirps(1000), 70529);
 ```
 
-`emirps([7700,8000],true)` повинен повертатися як `[7717,7757,7817,7841,7867,7879,7901,7927,7949,7951,7963]`
+`emirps([7700,8000],true)` має повернути `[7717,7757,7817,7841,7867,7879,7901,7927,7949,7951,7963]`
 
 ```js
 assert.deepEqual(emirps([7700, 8000], true), [
@@ -82,7 +82,7 @@ assert.deepEqual(emirps([7700, 8000], true), [
 ]);
 ```
 
-`emirps([7700,8000],false)` повинен повертатися як `11`
+`emirps([7700,8000],false)` має повернути `11`
 
 ```js
 assert.deepEqual(emirps([7700, 8000], false), 11);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/entropy.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/entropy.md
index e94dfae208c..99e4b0735e9 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/entropy.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/entropy.md
@@ -8,13 +8,13 @@ dashedName: entropy
 
 # --description--
 
-Calculate the Shannon entropy H of a given input string.
+Обчисліть ентропію Шеннона Н для наданого вхідного рядка.
 
-Зважаючи на дискретну випадкову змінну $X$, яка є рядком для $N$ «символів» (всіх символів), що складається з $n$ різних символів (n=2 для бінарних), інформаційна ентропія Шеннона для X в бітах/символах є:
+Для заданої випадкової дискретної величини $X$, яка є рядком з $N$ символів (загальна кількість), що складається з $n$ різних знаків (n=2 для бінарних значень), ентропією Шеннона величини Х в бітах/символ є:
 
 $H_2(X) = -\\sum\_{i=1}^n \\frac{count_i}{N} \\log_2 \\left(\\frac{count_i}{N}\\right)$
 
-де $count_i$ - це підрахунок символу $n_i$.
+де $count_i$ є кількістю знака $n_i$.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/equilibrium-index.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/equilibrium-index.md
index 723a3354466..f0913143fe5 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/equilibrium-index.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/equilibrium-index.md
@@ -8,9 +8,9 @@ dashedName: equilibrium-index
 
 # --description--
 
-An equilibrium index of a sequence is an index into the sequence such that the sum of elements at lower indices is equal to the sum of elements at higher indices.
+Індекс рівноваги послідовності — це індекс, де сума елементів нижчих індексів дорівнює сумі елементів вищих індексів.
 
-До прикладу, у послідовності $A$:
+Наприклад, в послідовності $A$:
 
 <ul style='list-style: none;'>
   <li><big>$A_0 = -7$</big></li>
@@ -22,13 +22,13 @@ An equilibrium index of a sequence is an index into the sequence such that the s
   <li><big>$A_6 =  0$</big></li>
 </ul>
 
-`3` є індексом рівноваги, тому що:
+`3` є індексом рівноваги, оскільки:
 
 <ul style='list-style: none;'>
   <li><big>$A_0 + A_1 + A_2 = A_4 + A_5 + A_6$</big></li>
 </ul>
 
-`6` є також індексом рівноваги, тому що:
+`6` також є індексом рівноваги, оскільки:
 
 <ul style='list-style: none;'>
   <li><big>$A_0 + A_1 + A_2 + A_3 + A_4 + A_5 = 0$</big></li>
@@ -36,13 +36,13 @@ An equilibrium index of a sequence is an index into the sequence such that the s
 
 (сума нульових елементів дорівнює нулю)
 
-`7` не є індексом рівноваги, оскільки це не є дійсним індексом послідовності $A$.
+`7` не є індексом рівноваги, оскільки це недійсний індекс послідовності $A$.
 
 # --instructions--
 
-Напишіть функцію, яка, за умови послідовності, повертає її показники рівноваги (якщо такі є).
+Дано послідовність. Напишіть функцію, яка повертає індекси рівноваги (якщо такі є).
 
-Припустимо, що послідовність може бути дуже довгою.
+Зверніть увагу, що послідовність може бути дуже довгою.
 
 # --hints--
 
@@ -52,37 +52,37 @@ An equilibrium index of a sequence is an index into the sequence such that the s
 assert(typeof equilibrium === 'function');
 ```
 
-`equilibrium([-7, 1, 5, 2, -4, 3, 0])` має повертати `[3,6]`.
+`equilibrium([-7, 1, 5, 2, -4, 3, 0])` має повернути `[3,6]`.
 
 ```js
 assert.deepEqual(equilibrium(equilibriumTests[0]), ans[0]);
 ```
 
-`equilibrium([2, 4, 6])` має повертати `[]`.
+`equilibrium([2, 4, 6])` має повернути `[]`.
 
 ```js
 assert.deepEqual(equilibrium(equilibriumTests[1]), ans[1]);
 ```
 
-`equilibrium([2, 9, 2])` має повертати `[1]`.
+`equilibrium([2, 9, 2])` має повернути `[1]`.
 
 ```js
 assert.deepEqual(equilibrium(equilibriumTests[2]), ans[2]);
 ```
 
-`equilibrium([1, -1, 1, -1, 1, -1, 1])` має повертати `[0,1,2,3,4,5,6]`.
+`equilibrium([1, -1, 1, -1, 1, -1, 1])` має повернути `[0,1,2,3,4,5,6]`.
 
 ```js
 assert.deepEqual(equilibrium(equilibriumTests[3]), ans[3]);
 ```
 
-`equilibrium([1])` має повертати `[0]`.
+`equilibrium([1])` має повернути `[0]`.
 
 ```js
 assert.deepEqual(equilibrium(equilibriumTests[4]), ans[4]);
 ```
 
-`equilibrium([])` має повертати `[]`.
+`equilibrium([])` має повернути `[]`.
 
 ```js
 assert.deepEqual(equilibrium(equilibriumTests[5]), ans[5]);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/ethiopian-multiplication.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/ethiopian-multiplication.md
index db5f46b37e5..572fc366b6a 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/ethiopian-multiplication.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/ethiopian-multiplication.md
@@ -8,7 +8,7 @@ dashedName: ethiopian-multiplication
 
 # --description--
 
-Ethiopian multiplication is a method of multiplying integers using only addition, doubling, and halving.
+Ефіопське множення — це метод множення цілих чисел з використанням додавання, подвоєння та ділення на два.
 
 **Метод:**
 
@@ -20,12 +20,12 @@ Ethiopian multiplication is a method of multiplying integers using only addition
   <li>Додайте значення справа, щоб отримати добуток двох початкових чисел</li>
 </ol>
 
-** Наприклад:** `17 × 34`
+**Наприклад:** `17 × 34`
 
 <pre>17   34
 </pre>
 
-Ділимо перший стовпчик:
+Ділимо на два перший стовпчик:
 
 <pre>17   34
 8
@@ -67,11 +67,11 @@ Ethiopian multiplication is a method of multiplying integers using only addition
 
 <!-- markdownlint-enable MD003 -->
 
-Отже `17` помножене `34`, за ефіопським методом - `578`.
+Отже, якщо помножити `17` на `34` за ефіопським методом, то отримаємо `578`.
 
 # --instructions--
 
-Завданням полягає в тому, щоб визначити три іменовані функції, методи, процедури, підпрограми:
+Вам потрібно визначити три функції/методи/процедури/підпрограми:
 
 <ol>
   <li>для ділення цілого числа на два</li>
@@ -79,7 +79,7 @@ Ethiopian multiplication is a method of multiplying integers using only addition
   <li>для визначення, чи ціле число є парним</li>
 </ol>
 
-Використовуйте ці функції, щоб створити функцію, яка виконує ефіопське множення.
+Використайте ці функції, щоб створити функцію, яка виконує ефіопське множення.
 
 <!-- markdownlint-disable MD046-->
 
@@ -91,31 +91,31 @@ Ethiopian multiplication is a method of multiplying integers using only addition
 assert(typeof eth_mult === 'function');
 ```
 
-`eth_mult(17,34)` має повертати `578`.
+`eth_mult(17,34)` має повернути `578`.
 
 ```js
 assert.equal(eth_mult(17, 34), 578);
 ```
 
-`eth_mult(23,46)` має повертати `1058`.
+`eth_mult(23,46)` має повернути `1058`.
 
 ```js
 assert.equal(eth_mult(23, 46), 1058);
 ```
 
-`eth_mult(12,27)` має повертати `324`.
+`eth_mult(12,27)` має повернути `324`.
 
 ```js
 assert.equal(eth_mult(12, 27), 324);
 ```
 
-`eth_mult(56,98)` має повертати `5488`.
+`eth_mult(56,98)` має повернути `5488`.
 
 ```js
 assert.equal(eth_mult(56, 98), 5488);
 ```
 
-`eth_mult(63,74)` має повертати `4662`.
+`eth_mult(63,74)` має повернути `4662`.
 
 ```js
 assert.equal(eth_mult(63, 74), 4662);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/euler-method.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/euler-method.md
index ed093c68c3d..919899fbbb5 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/euler-method.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/euler-method.md
@@ -8,9 +8,9 @@ dashedName: euler-method
 
 # --description--
 
-Euler's method numerically approximates solutions of first-order ordinary differential equations (ODEs) with a given initial value. It is an explicit method for solving initial value problems (IVPs), as described in <a href="https://www.freecodecamp.org/news/eulers-method-explained-with-examples/" title="Euler's Method Explained with Examples" target="_blank" rel="noopener noreferrer nofollow">this article</a>.
+Метод Ейлера надає приблизний розв’язок звичайних диференціальних рівнянь першого порядку з заданим початковим значенням. Це явний метод розв’язку задачі Коші, як описано <a href="https://www.freecodecamp.org/news/eulers-method-explained-with-examples/" title="Euler's Method Explained with Examples" target="_blank" rel="noopener noreferrer nofollow">в цій статті</a>.
 
-ODE повинен бути наданий за такою формою:
+Звичайні диференціальні рівняння задані в такому форматі:
 
 <ul style='list-style: none;'>
   <li><big>$\frac{dy(t)}{dt} = f(t,y(t))$</big></li>
@@ -22,13 +22,13 @@ ODE повинен бути наданий за такою формою:
   <li><big>$y(t_0) = y_0$</big></li>
 </ul>
 
-Щоб отримати числове рішення, ми заміняємо похідну на LHS з скінченним наближенням до різниці:
+Щоб отримати числовий розв’язок, замінимо похідну зліва на скінченнорізницеве наближення:
 
 <ul style='list-style: none;'>
   <li><big>$\frac{dy(t)}{dt}  \approx \frac{y(t+h)-y(t)}{h}$</big></li>
 </ul>
 
-тоді вирішіть для $y(t+h)$:
+потім знайдемо $y(t+h)$:
 
 <ul style='list-style: none;'>
   <li><big>$y(t+h) \approx y(t) + h \, \frac{dy(t)}{dt}$</big></li>
@@ -40,17 +40,17 @@ ODE повинен бути наданий за такою формою:
   <li><big>$y(t+h) \approx y(t) + h \, f(t,y(t))$</big></li>
 </ul>
 
-Тоді, правило повторного рішення:
+Тоді правило ітеративного розв’язку:
 
 <ul style='list-style: none;'>
   <li><big>$y_{n+1} = y_n + h \, f(t_n, y_n)$</big></li>
 </ul>
 
-де $h$ - розмір кроку, найбільш відповідний параметр для точності рішення. Менший розмір кроку збільшує точність, але й обчислювальні витрати, тому вони завжди повинні бути підібрані вручну відповідно до завдань.
+де $h$ є розміром кроку — найважливішим параметром для точності розв’язку. Менший розміру кроку збільшує точність, але також і витрати обчислень, тому його завжди потрібно вибирати відповідно до конкретної задачі.
 
-**Приклад: Закон Ньютона**
+**Приклад: закон Ньютона про охолодження**
 
-Закон Ньютона описує як об’єкт початкової температури $T(t_0) = T_0$ охолоджується в умовах температури $T_R$:
+Закон Ньютона про охолодження описує, як об’єкт з початковою температурою $T(t_0) = T_0$ охолоджується за температури $T_R$:
 
 <ul style='list-style: none;'>
   <li><big>$\frac{dT(t)}{dt} = -k \, \Delta T$</big></li>
@@ -62,9 +62,9 @@ ODE повинен бути наданий за такою формою:
   <li><big>$\frac{dT(t)}{dt} = -k \, (T(t) - T_R)$</big></li>
 </ul>
 
-Він каже, що швидкість охолодження $\\frac{dT(t)}{dt}$ $ об'єктів пропорційна поточній різниці температури $\\Delta T = (T(t) - T_R)$ в навколишнє середовище.
+Це означає, що швидкість охолодження об’єкта $\\frac{dT(t)}{dt}$ пропорційна поточній різниці температур між об’єктом та навколишнім середовищем $\\Delta T = (T(t) - T_R)$.
 
-Аналітичне рішення, яке ми будемо порівняти з числовим наближенням, є
+Ось аналітичний розв’язок, який ми порівняємо з числовим наближенням:
 
 <ul style='list-style: none;'>
   <li><big>$T(t) = T_R + (T_0 - T_R) \; e^{-k t}$</big></li>
@@ -72,26 +72,26 @@ ODE повинен бути наданий за такою формою:
 
 # --instructions--
 
-Реалізуйте розпорядок методу Ейлера та використовуйте його для рішення заданого прикладу закону Ньютона про три різні розміри кроку:
+Реалізуйте процедуру методу Ейлера, а потім використайте його, щоб розв’язати закон Ньютона про охолодження з трьома різними розмірами кроку:
 
 <ul>
   <li><code>2 s</code></li>
-  <li><code>5 s</code> і</li>
+  <li><code>5 s</code></li>
   <li><code>10 s</code></li>
 </ul>
 
-та порівняти з аналітичним рішенням.
+та порівняйте з аналітичним розв’язком.
 
 **Початкові значення:**
 
 <ul>
-  <li>initial temperature <big>$T_0$</big> shall be <code>100 °C</code></li>
-  <li>температура кімнати <big>$T_R$</big> має бути <code>20 °C</code></li>
-  <li>охолодження константи <big>$k$</big> має буде <code>0.07</code></li>
-  <li>інтервал обчислення повинен бути від <code>0 s</code> до <code>100 s</code></li>
+  <li>початкова температура <big>$T_0$</big> дорівнює <code>100 °C</code></li>
+  <li>кімнатна температура <big>$T_R$</big> дорівнює <code>20 °C</code></li>
+  <li>константа охолодження <big>$k$</big> дорівнює <code>0.07</code></li>
+  <li>часовий інтервал для обчислення дорівнює від <code>0 s</code> до <code>100 s</code></li>
 </ul>
 
-Перший параметр функції - це початковий час, другий параметр - початкова температура, третій - минулий час і четвертий параметр - крок розміру.
+Перший параметр функції — початковий час, другий параметр — початкова температура, третій параметр — пройдений час, а четвертий параметр — розмір кроку.
 
 # --hints--
 
@@ -107,19 +107,19 @@ assert(typeof eulersMethod === 'function');
 assert(typeof eulersMethod(0, 100, 100, 2) === 'number');
 ```
 
-`eulersMethod(0, 100, 100, 2)` має повернути 20.0424631833732.
+`eulersMethod(0, 100, 100, 2)` має повернути `20.0424631833732`.
 
 ```js
 assert.equal(eulersMethod(0, 100, 100, 2), 20.0424631833732);
 ```
 
-`eulersMethod(0, 100, 100, 5)` має повернути 20.01449963666907.
+`eulersMethod(0, 100, 100, 5)` має повернути `20.01449963666907`.
 
 ```js
 assert.equal(eulersMethod(0, 100, 100, 5), 20.01449963666907);
 ```
 
-`eulersMethod(0, 100, 100, 10)` має повернути 20.000472392.
+`eulersMethod(0, 100, 100, 10)` має повернути `20.000472392`.
 
 ```js
 assert.equal(eulersMethod(0, 100, 100, 10), 20.000472392);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/evaluate-binomial-coefficients.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/evaluate-binomial-coefficients.md
index 4d8cba17c86..945af542602 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/evaluate-binomial-coefficients.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/evaluate-binomial-coefficients.md
@@ -1,6 +1,6 @@
 ---
 id: 598de241872ef8353c58a7a2
-title: Оцініть біноміальні коефіцієнти
+title: Обчислення біноміальних коефіцієнтів
 challengeType: 1
 forumTopicId: 302259
 dashedName: evaluate-binomial-coefficients
@@ -8,9 +8,9 @@ dashedName: evaluate-binomial-coefficients
 
 # --description--
 
-Write a function to calculate the binomial coefficient for the given value of n and k.
+Напишіть функцію для обчислення біноміального коефіцієнта для заданих значень n та k.
 
-Рекомендується така формула:
+Рекомендована формула:
 
 $\\binom{n}{k} = \\frac{n!}{(n-k)!k!} = \\frac{n(n-1)(n-2)\\ldots(n-k+1)}{k(k-1)(k-2)\\ldots 1}$
 
@@ -22,31 +22,31 @@ $\\binom{n}{k} = \\frac{n!}{(n-k)!k!} = \\frac{n(n-1)(n-2)\\ldots(n-k+1)}{k(k-1)
 assert(typeof binom === 'function');
 ```
 
-`binom(5,3)` має повернути число 10.
+`binom(5,3)` має повернути 10.
 
 ```js
 assert.equal(binom(5, 3), 10);
 ```
 
-`binom(7,2)` має повернути число 21.
+`binom(7,2)` має повернути 21.
 
 ```js
 assert.equal(binom(7, 2), 21);
 ```
 
-`binom(10,4)` має повернути число 210.
+`binom(10,4)` має повернути 210.
 
 ```js
 assert.equal(binom(10, 4), 210);
 ```
 
-`binom(6,1)` має повернути число 6.
+`binom(6,1)` має повернути 6.
 
 ```js
 assert.equal(binom(6, 1), 6);
 ```
 
-`binom(12,8)` має повернути число 495.
+`binom(12,8)` має повернути 495.
 
 ```js
 assert.equal(binom(12, 8), 495);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/execute-a-markov-algorithm.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/execute-a-markov-algorithm.md
index ee2b8405f4f..8605ce73d51 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/execute-a-markov-algorithm.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/execute-a-markov-algorithm.md
@@ -1,6 +1,6 @@
 ---
 id: 59e09e6d412c5939baa02d16
-title: Виконайте алгоритм Маркова
+title: Виконання алгоритму Маркова
 challengeType: 1
 forumTopicId: 302260
 dashedName: execute-a-markov-algorithm
@@ -8,13 +8,13 @@ dashedName: execute-a-markov-algorithm
 
 # --description--
 
-Markov Concepts are used in machine learning, because of its simple approach in data manipulation. With a set number of `rules` you can manipulate given `data` to create a desired `output`.
+Ідеї Маркова використовують в машинному навчанні завдяки простому підходу до маніпулювання даними. Завдяки встановленій кількості правил (`rules`) ви можете маніпулювати заданими даними (`data`), щоб отримати бажані вихідні дані (`output`).
 
 Ми додали у фоновому режимі:
 
-The `rules` in the form of nested array, and the `data` in the form of array, too. Та бажані `outputs`.
+Правила (`rules`) у вигляді вкладеного масиву та дані (`data`) у вигляді масиву. А також бажані вихідні дані (`outputs`).
 
-`rules`:
+Правила (`rules`):
 
 ```js
 let rules=[
@@ -48,7 +48,7 @@ let rules=[
 ];
 ```
 
-`data`:
+Дані (`data`):
 
 ```js
 let data=[
@@ -60,7 +60,7 @@ let data=[
         ];
 ```
 
-`outputs`:
+Вихідні дані (`outputs`):
 
 ```js
 let outputs=[
@@ -72,7 +72,7 @@ let outputs=[
     ]
 ```
 
-Використовуючи Алгоритм Маркова, змініть `data` на бажаний `outputs` за допомогою наданих вам `rules`.
+Змініть дані (`data`) на бажані вихідні дані (`outputs`) за допомогою наданих правил (`rules`), використовуючи алгоритм Маркова.
 
 # --hints--
 
@@ -82,31 +82,31 @@ let outputs=[
 assert(typeof markov === 'function');
 ```
 
-`markov(["A -> apple","B -> bag","S -> shop","T -> the","the shop -> my brother","a never used -> .terminating rule"],"I bought a B of As from T S.")` має повертати рядок `I bought a bag of apples from my brother.`.
+`markov(["A -> apple","B -> bag","S -> shop","T -> the","the shop -> my brother","a never used -> .terminating rule"],"I bought a B of As from T S.")` має повернути рядок `I bought a bag of apples from my brother.`.
 
 ```js
 assert.deepEqual(markov(rules[0], datas[0]), outputs[0]);
 ```
 
-`markov(["A -> apple","B -> bag","S -> .shop","T -> the","the shop -> my brother","a never used -> .terminating rule"],"I bought a B of As from T S.")` має повертати рядок `I bought a bag of apples from T shop.`.
+`markov(["A -> apple","B -> bag","S -> .shop","T -> the","the shop -> my brother","a never used -> .terminating rule"],"I bought a B of As from T S.")` має повернути рядок `I bought a bag of apples from T shop.`.
 
 ```js
 assert.deepEqual(markov(rules[1], datas[1]), outputs[1]);
 ```
 
-`markov(["A -> apple","WWWW -> with","Bgage -> ->.*","B -> bag","->.* -> money","W -> WW","S -> .shop","T -> the","the shop -> my brother","a never used -> .terminating rule"],"I bought a B of As W my Bgage from T S.")` має повертати рядок `I bought a bag of apples with my money from T shop.`.
+`markov(["A -> apple","WWWW -> with","Bgage -> ->.*","B -> bag","->.* -> money","W -> WW","S -> .shop","T -> the","the shop -> my brother","a never used -> .terminating rule"],"I bought a B of As W my Bgage from T S.")` має повернути рядок `I bought a bag of apples with my money from T shop.`.
 
 ```js
 assert.deepEqual(markov(rules[2], datas[2]), outputs[2]);
 ```
 
-`markov(["_+1 -> _1+","1+1 -> 11+","1! -> !1",",! -> !+","_! -> _","1*1 -> x,@y","1x -> xX","X, -> 1,1","X1 -> 1X","_x -> _X",",x -> ,X","y1 -> 1y","y_ -> _","1@1 -> x,@y","1@_ -> @_",",@_ -> !_","++ -> +","_1 -> 1","1+_ -> 1","_+_ -> "],"_1111*11111_")` should return the string `11111111111111111111`.
+`markov(["_+1 -> _1+","1+1 -> 11+","1! -> !1",",! -> !+","_! -> _","1*1 -> x,@y","1x -> xX","X, -> 1,1","X1 -> 1X","_x -> _X",",x -> ,X","y1 -> 1y","y_ -> _","1@1 -> x,@y","1@_ -> @_",",@_ -> !_","++ -> +","_1 -> 1","1+_ -> 1","_+_ -> "],"_1111*11111_")` має повернути рядок `11111111111111111111`.
 
 ```js
 assert.deepEqual(markov(rules[3], datas[3]), outputs[3]);
 ```
 
-`markov(["A0 -> 1B","0A1 -> C01","1A1 -> C11","0B0 -> A01","1B0 -> A11","B1 -> 1B","0C0 -> B01","1C0 -> B11","0C1 -> H01","1C1 -> H11"],"")` має повертати рядок `00011H1111000`.
+`markov(["A0 -> 1B","0A1 -> C01","1A1 -> C11","0B0 -> A01","1B0 -> A11","B1 -> 1B","0C0 -> B01","1C0 -> B11","0C1 -> H01","1C1 -> H11"],"")` має повернути рядок `00011H1111000`.
 
 ```js
 assert.deepEqual(markov(rules[4], datas[4]), outputs[4]);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/execute-brain.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/execute-brain.md
index ff2a503d38e..62a7d597284 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/execute-brain.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/execute-brain.md
@@ -10,28 +10,28 @@ dashedName: execute-brain
 
 Write a function to implement a Brain\*\*\*\* interpreter. The function will take a string as a parameter and should return a string as the output. More details are given below:
 
-RCBF є множиною <a href="https://rosettacode.org/wiki/Brainf***" target="_blank" rel="noopener noreferrer nofollow">Brainf\*\*\*</a> компіляторів та інтерпретаторів, написаних для Rosetta code різними мовами.
+RCBF is a set of <a href="https://rosettacode.org/wiki/Brainf***" target="_blank" rel="noopener noreferrer nofollow">Brainf\*\*\*</a> compilers and interpreters written for Rosetta Code in a variety of languages.
 
-Нижче наведено посилання на кожну з версій RCBF.
+Below are links to each of the versions of RCBF.
 
-Впровадження потребує чіткого дотримання таких інструкцій:
+An implementation need only properly implement the following instructions:
 
-| Команда                   | Опис                                                                             |
-| ------------------------- | -------------------------------------------------------------------------------- |
-| <code>></code> | Перемістити курсор праворуч                                                      |
-| <code>&lt;</code> | Перемістити курсор ліворуч                                                       |
-| <code>+</code> | Збільшити поточну комірку під курсором                                           |
-| <code>-</code> | Зменшити поточну комірку під курсором                                            |
-| <code>.</code> | Вивести значення комірки під курсором                                            |
-| <code>,</code> | Ввести значення та зберегти його в комірці під курсором                          |
-| <code>\[</code> | Перейти до <code>]</code>, якщо значенням комірки під курсором є 0     |
-| <code>]</code> | Перейти до <code>\[</code>, якщо значенням комірки під курсором не є 0 |
+| Command           | Description                                                                        |
+| ----------------- | ---------------------------------------------------------------------------------- |
+| <code>></code>    | Move the pointer to the right                                                      |
+| <code>&lt;</code> | Move the pointer to the left                                                       |
+| <code>+</code>    | Increment the memory cell under the pointer                                        |
+| <code>-</code>    | Decrement the memory cell under the pointer                                        |
+| <code>.</code>    | Output the character signified by the cell at the pointer                          |
+| <code>,</code>    | Input a character and store it in the cell at the pointer                          |
+| <code>\[</code>   | Jump past the matching <code>]</code> if the cell under the pointer is 0           |
+| <code>]</code>    | Jump back to the matching <code>\[</code> if the cell under the pointer is nonzero |
 
-Розмір комірки може бути довільним, EOF (*E*nd-*O*-*F*ile) підтримка не є обов’язковою, так само як і наявність обмеженої й необмеженої пам’яті.
+Any cell size is allowed, EOF (*E*nd-*O*-*F*ile) support is optional, as is whether you have bounded or unbounded memory.
 
 # --hints--
 
-`brain(bye)` повинен вивести рядок
+`brain(bye)` should return a string
 
 ```js
 assert(typeof brain(bye) === 'string');
@@ -43,19 +43,19 @@ assert(typeof brain(bye) === 'string');
 assert.equal(brain('++++++[>++++++++++<-]>+++++.'), 'A');
 ```
 
-`brain(bye)`повинен вивести `Goodbye, World!\r\n`
+`brain(bye)` should return `Goodbye, World!\r\n`
 
 ```js
 assert.equal(brain(bye), 'Goodbye, World!\r\n');
 ```
 
-`brain(hello)`повинен вивести`Hello World!\n`
+`brain(hello)` should return `Hello World!\n`
 
 ```js
 assert.equal(brain(hello), 'Hello World!\n');
 ```
 
-`brain(fib)`повинен вивести`1, 1, 2, 3, 4, 5, 8, 13, 21, 34, 55, 89`
+`brain(fib)` should return `1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89`
 
 ```js
 assert.equal(brain(fib), '1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89');
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/extensible-prime-generator.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/extensible-prime-generator.md
index 1ae1812e439..d1a4d379ea5 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/extensible-prime-generator.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/extensible-prime-generator.md
@@ -1,6 +1,6 @@
 ---
 id: 598ee8b91b410510ae82efef
-title: Генератор простих чисел з можливістю розширення
+title: Розширний генератор простих чисел
 challengeType: 1
 forumTopicId: 302262
 dashedName: extensible-prime-generator
@@ -8,18 +8,18 @@ dashedName: extensible-prime-generator
 
 # --description--
 
-Write a generator of prime numbers, in order, that will automatically adjust to accommodate the generation of any reasonably high prime.
+Напишіть генератор простих чисел за порядком, який автоматично адаптується для генерації будь-якого достатньо великого простого числа.
 
-Генератор повинен мати здатність:
+Генератор повинен:
 
 <ul>
-  <li>Show the first <code>n</code> prime numbers</li>
-  <li>Показувати прості числа в діапазоні</li>
-  <li>Показувати число простих чисел у діапазоні</li>
-  <li>Показувати <code>n<sup>th</sup></code> просте число</li>
+  <li>показувати перші <code>n</code> простих чисел</li>
+  <li>показувати прості числа в діапазоні</li>
+  <li>показувати кількість простих чисел в діапазоні</li>
+  <li>показувати <code>n<sup>-не</sup></code> просте число</li>
 </ul>
 
-Функція повинна мати два параметри. Перший отримає `n` або діапазон у вигляді масиву. Другий отримає логічний тип даних, що вказує, чи повертає функція прості числа у вигляді масиву або одного і того ж числа (кількість простих чисел у діапазоні або <code>n<sup>th</sup></code> просте число). Відповідно до параметрів функція має повернути масив.
+Функція повинна мати два параметри. Перший отримає `n` або діапазон у вигляді масиву. Другий отримає булеве значення, яке вказує, чи повертає функція прості числа у вигляді масиву, чи одне число (кількість простих чисел у діапазоні або <code>n<sup>-не</sup></code> просте число). Відповідно до параметрів функція має повернути масив.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/factorial.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/factorial.md
index 646c634c3e4..98686e4b3d4 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/factorial.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/factorial.md
@@ -8,9 +8,9 @@ dashedName: factorial
 
 # --description--
 
-Write a function to return the factorial of a number.
+Напишіть функцію, яка поверне факторіал числа.
 
-Факторіал числа визначається як:
+Факторіал числа задано виразом:
 
 <pre><big>n! = n * (n-1) * (n-2) * ..... * 1</big>
 </pre>
@@ -38,19 +38,19 @@ assert(typeof factorial === 'function');
 assert(typeof factorial(2) === 'number');
 ```
 
-`factorial(3)` має повернути число 6.
+`factorial(3)` має повернути `6`.
 
 ```js
 assert.equal(factorial(3), 6);
 ```
 
-`factorial(5)` має повернути число 120.
+`factorial(5)` має повернути `120`.
 
 ```js
 assert.equal(factorial(5), 120);
 ```
 
-`factorial(10)` має повернути число 3,628,800.
+`factorial(10)` має повернути `3,628,800`.
 
 ```js
 assert.equal(factorial(10), 3628800);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/factors-of-a-mersenne-number.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/factors-of-a-mersenne-number.md
index 8b3374bd443..2967128cfa0 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/factors-of-a-mersenne-number.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/factors-of-a-mersenne-number.md
@@ -10,7 +10,7 @@ dashedName: factors-of-a-mersenne-number
 
 A Mersenne number is a number in the form of <code>2<sup>P</sup>-1</code>.
 
-Якщо `P` є простим, то число Мерсенна може бути простим числом Мерсенна. (Якщо `P` не є простим, число Мерсенна також не є простим.)
+If `P` is prime, the Mersenne number may be a Mersenne prime. (If `P` is not prime, the Mersenne number is also not prime.)
 
 У пошуку простих чисел Мерсенна вигідно усунути експоненти, знайшовши невеликий фактор перед початком, потенційно довжину, <a href="https://rosettacode.org/wiki/Lucas-Lehmer test" target="_blank" rel="noopener noreferrer nofollow">тест Лукас-Лемер</a>.
 
@@ -70,19 +70,19 @@ assert(typeof check_mersenne === 'function');
 assert(typeof check_mersenne(3) == 'string');
 ```
 
-`check_mersenne(3)`повинен повертатися рядок `M3 = 2^3-1 is prime`.
+`check_mersenne(3)` should return the string `M3 = 2^3-1 is prime`.
 
 ```js
 assert.equal(check_mersenne(3), 'M3 = 2^3-1 is prime');
 ```
 
-`check_mersenne(23)` повинен повертатися як рядок `M23 = 2^23-1 is composite with factor 47`.
+`check_mersenne(23)` should return the string `M23 = 2^23-1 is composite with factor 47`.
 
 ```js
 assert.equal(check_mersenne(23), 'M23 = 2^23-1 is composite with factor 47');
 ```
 
-`check_mersenne(929)` повинен повертати рядок `M929 = 2^929-1 is composite with factor 13007`.
+`check_mersenne(929)` should return the string `M929 = 2^929-1 is composite with factor 13007`.
 
 ```js
 assert.equal(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/factors-of-an-integer.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/factors-of-an-integer.md
index de228fed221..540f3beb7cd 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/factors-of-an-integer.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/factors-of-an-integer.md
@@ -8,9 +8,9 @@ dashedName: factors-of-an-integer
 
 # --description--
 
-Write a function that returns the factors of a positive integer as an array.
+Напишіть функцію, яка повертає множники натурального числа у вигляді масиву.
 
-Ці множники є додатними цілими числами, за допомогою яких число, яке розкладають на множники, можна поділити так, щоб отримати результат цілого додатного числа.
+Якщо задане число поділити на ці множники, то отримаємо результат у вигляді натурального числа.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/farey-sequence.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/farey-sequence.md
index 7012a5a1801..432a42e0780 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/farey-sequence.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/farey-sequence.md
@@ -1,6 +1,6 @@
 ---
 id: 59c3ec9f15068017c96eb8a3
-title: Ряд Фарея
+title: Послідовність Фарея
 challengeType: 1
 forumTopicId: 302266
 dashedName: farey-sequence
@@ -8,18 +8,18 @@ dashedName: farey-sequence
 
 # --description--
 
-The Farey sequence <code>F<sub>n</sub></code> of order `n` is the sequence of completely reduced fractions between `0` and `1` which, when in lowest terms, have denominators less than or equal to `n`, arranged in order of increasing size.
+Послідовність Фарея <code>F<sub>n</sub></code> порядку `n` — це послідовність нескоротних дробів від `0` до `1`, знаменники яких менші або дорівнюють `n`, а дроби розташовані в порядку зростання.
 
-*Ряд Фарея* деколи помилково називають *Серією Фарея*.
+Іноді *послідовність Фарея* помилково називають *рядом Фарея*.
 
-Кожен ряд Фарея:
+Кожна послідовність Фарея:
 
 <ul>
   <li>починається зі значення 0, що виражено дробом $ \frac{0}{1} $</li>
   <li>закінчується значенням 1, що виражено дробом $ \frac{1}{1}$.</li>
 </ul>
 
-Послідовностями рядів Фарея від `1` до `5` є:
+Послідовності Фарея порядку від `1` до `5`:
 
 <ul>
   <li style='list-style: none;'>${\bf\it{F}}_1 = \frac{0}{1}, \frac{1}{1}$</li>
@@ -31,7 +31,7 @@ The Farey sequence <code>F<sub>n</sub></code> of order `n` is the sequence of co
 
 # --instructions--
 
-Напишіть функцію, яка повертає послідовність ряду Фарея`n`. Функція повинна мати один параметр, який є`n`. Вона має повернути послідовність у вигляді масиву.
+Напишіть функцію, яка повертає послідовність Фарея порядку `n`. Функція повинна мати один параметр: `n`. Вона має повернути послідовність у вигляді масиву.
 
 # --hints--
 
@@ -41,13 +41,13 @@ The Farey sequence <code>F<sub>n</sub></code> of order `n` is the sequence of co
 assert(typeof farey === 'function');
 ```
 
-`farey(3)` має повернути масив
+`farey(3)` має повернути масив.
 
 ```js
 assert(Array.isArray(farey(3)));
 ```
 
-`farey(3)` має повертати `['0/1','1/3','1/2','2/3','1/1']`
+`farey(3)` має повернути `['0/1','1/3','1/2','2/3','1/1']`
 
 ```js
 assert.deepEqual(farey(3),['0/1', '1/3', '1/2', '2/3', '1/1']);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fibonacci-n-step-number-sequences.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fibonacci-n-step-number-sequences.md
index f2b5999378d..c1c5403b02e 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fibonacci-n-step-number-sequences.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fibonacci-n-step-number-sequences.md
@@ -1,6 +1,6 @@
 ---
 id: 598eef80ba501f1268170e1e
-title: Послідовність n-крокових чисел Фібоначчі
+title: n-крокові послідовності Фібоначчі
 challengeType: 1
 forumTopicId: 302267
 dashedName: fibonacci-n-step-number-sequences
@@ -8,7 +8,7 @@ dashedName: fibonacci-n-step-number-sequences
 
 # --description--
 
-These number series are an expansion of the ordinary Fibonacci sequence where:
+Такі числові ряди є розширенням звичайної послідовності Фібоначчі, де:
 
 <ol>
   <li>За умови $n = 2$ ми отримаємо послідовність Фібоначчі з початковими значеннями $[1, 1]$ та $F_k^2 = F_{k-1}^2 + F_{k-2}^2$</li>
@@ -17,9 +17,9 @@ These number series are an expansion of the ordinary Fibonacci sequence where:
   <li>За загальної умови $n>2$ ми отримаємо $n$-крокову послідовність Фібоначчі $F_k^n$ з початковими значеннями перших $n$ значень $(n-1)$-ї $n$-крокової послідовності Фібоначчі $F_k^{n-1}$, а $k$-им значенням цієї $n$-ї послідовності є $F_k^n = \sum_{i=1}^{(n)} {F_{k-i}^{(n)}}$</li>
 </ol>
 
-Для малих значень $n$ інколи використовуються Грецькі цифрові префікси для окремої назви кожної серії.
+За малих значень $n$ іноді використовують грецькі числові префікси, щоб найменувати кожну послідовність.
 
-Послідовність $n$- крокових чисел Фібоначчі:
+$n$-крокові послідовності Фібоначчі:
 
 | $n$ | Назва множини | Значення                                               |
 | --- | ------------- | ------------------------------------------------------ |
@@ -33,11 +33,11 @@ These number series are an expansion of the ordinary Fibonacci sequence where:
 | 9   | нонаначчі     | 1 1 2 4 8 16 32 64 128 256 511 1021 2040 4076 8144 ... |
 | 10  | деканаччі     | 1 1 2 4 8 16 32 64 128 256 512 1023 2045 4088 8172 ... |
 
-Союзні послідовності можна створити там, де початкові значення змінюються: Послідовність Люка сумує два попередніх значення, так само як серія Фібоначчі за умови $n= 2$, але використовує рядок $\[2, 1]$ як початкові значення.
+Споріднені послідовності можна утворити там, де змінюються початкові значення: за умови $n=2$ послідовність Люка сумує два попередні значення схоже до послідовності Фібоначчі, але використовує $\[2, 1]$ як початкові значення.
 
 # --instructions--
 
-Напишіть функцію для створення послідовностей $n$-крокових чисел Фібоначчі та послідовностей Люка. Першим параметром буде $n$. Другим параметром буде кількість елементів, які потрібно повернути. Третій параметр вказуватиме, що виводити: послідовність Фібоначчі чи послідовність Люка. If the parameter is `"f"` then return the Fibonacci sequence and if it is `"l"`, then return the Lucas sequence. Послідовності необхідно повернути у вигляді масиву.
+Напишіть функцію, щоб генерувати $n$-крокові послідовності Фібоначчі або послідовності Люка. Першим параметром буде $n$. Другим параметром буде кількість елементів, які потрібно повернути. Третій параметр вказуватиме, що виводити: послідовність Фібоначчі чи послідовність Люка. Якщо параметром є `"f"`, то поверніть послідовність Фібоначчі; якщо `"l"`, то поверніть послідовність Люка. Послідовності потрібно повернути у вигляді масиву.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fibonacci-sequence.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fibonacci-sequence.md
index 8592dcb3b32..f951dbfe039 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fibonacci-sequence.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fibonacci-sequence.md
@@ -8,13 +8,13 @@ dashedName: fibonacci-sequence
 
 # --description--
 
-Write a function to generate the <code>n<sup>th</sup></code> Fibonacci number.
+Напишіть функцію, щоб знайти <code>n<sup>-не</sup></code> число Фібоначчі.
 
-Число Фібоначчі <code>n<sup>th</sup></code>задається:
+<code>n<sup>-не</sup></code> число Фібоначчі задане формулою:
 
 <code>F<sub>n</sub> = F<sub>n-1</sub> + F<sub>n-2</sub></code>
 
-Першими двома членами послідовностей є 0 і 1.
+Першими двома членами послідовності є 0 та 1.
 
 Отже, послідовність наступна: 0, 1, 1, 2, 3, 5, 8, 13...
 
@@ -32,19 +32,19 @@ assert(typeof fibonacci === 'function');
 assert(typeof fibonacci(2) == 'number');
 ```
 
-`fibonacci(3)` має повернути число 2.
+`fibonacci(3)` має повернути 2.
 
 ```js
 assert.equal(fibonacci(3), 2);
 ```
 
-`fibonacci(5)` має повернути число 5.
+`fibonacci(5)` має повернути 5.
 
 ```js
 assert.equal(fibonacci(5), 5);
 ```
 
-`fibonacci(10)` має повернути число 55.
+`fibonacci(10)` має повернути 55.
 
 ```js
 assert.equal(fibonacci(10), 55);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fibonacci-word.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fibonacci-word.md
index de00599f040..f23e4d89d1c 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fibonacci-word.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fibonacci-word.md
@@ -8,7 +8,7 @@ dashedName: fibonacci-word
 
 # --description--
 
-The Fibonacci Word Sequence may be created in a manner analogous to the Fibonacci Sequence, but it focuses on iterating concatenation.
+Послідовність слів Фібоначчі можна створити схожим способом до послідовності Фібоначчі, але вона зосереджена на об’єднанні.
 
 <pre>Визначте F_Word<sub>1</sub> як <strong>1</strong>
 Визначте F_Word<sub>2</sub> як <strong>0</strong>
@@ -16,11 +16,11 @@ The Fibonacci Word Sequence may be created in a manner analogous to the Fibonacc
 Утворіть F_Word<sub>n</sub> як F_Word<sub>n-1</sub>, об’єднане з F_word<sub>n-2</sub>
 </pre>
 
-Для цього завдання потрібне обчислення ентропії <a href="https://www.freecodecamp.org/learn/coding-interview-prep/rosetta-code/entropy" target="_blank" rel="noopener noreferrer nofollow" ="crwd-mark">як показано в цьому завданні Розетта Код</a>
+Для цього завдання обов’язковий ентропічний розрахунок, <a href="https://www.freecodecamp.org/ukrainian/learn/rosetta-code/rosetta-code-challenges/entropy" target="_blank" rel="noopener noreferrer nofollow">як показано в цьому завданні</a>
 
 # --instructions--
 
-Напишіть функцію, що повертає перші `n` слів Фібоначчі. Число `n` надається як параметр функції. Функція має повернути масив об’єктів. Об’єкти мають мати такий вигляд: `{ N: 1, Length: 1, Entropy: 0, Word: '1' }`. `Entropy` обчислюється для рядка `Word` та округлюється до 8 десяткових цифр точності. Зауважте, що індекси цієї послідовності починаються з `1`.
+Напишіть функцію, яка повертає перші `n` слів Фібоначчі. Число `n` надається як параметр до функції. Функція має повернути масив об’єктів. Об’єкти повинні мати наступний вигляд: `{ N: 1, Length: 1, Entropy: 0, Word: '1' }`. `Entropy` обчислюється для рядка `Word` та округлюється до 8 десяткових цифр. Зауважте, що індекси цієї послідовності починаються з `1`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fizzbuzz.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fizzbuzz.md
index 59ff2fe506b..ab3d2bf4cff 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fizzbuzz.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fizzbuzz.md
@@ -8,7 +8,7 @@ dashedName: fizzbuzz
 
 # --description--
 
-Write a program that generates an array of integers from 1 to 100 (inclusive). But:
+Напишіть програму, яка генерує масив цілих чисел від 1 до 100 (включно). Але:
 
 <ul>
     <li>для кратних числа 3 додайте <code>"Fizz"</code> до масиву замість числа</li>
@@ -18,7 +18,7 @@ Write a program that generates an array of integers from 1 to 100 (inclusive). B
 
 # --instructions--
 
-Ваша програма має повернути масив, що містить результати на основі вищезазначених правил.
+Програма має повернути масив, який містить результати на основі правил вище.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fractran.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fractran.md
index ef7503a4cd8..bc4462042b5 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fractran.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/fractran.md
@@ -1,6 +1,6 @@
 ---
 id: 5a7dad05be01840e1778a0d1
-title: Мова програмування Fractran
+title: Fractran
 challengeType: 1
 forumTopicId: 302270
 dashedName: fractran
@@ -8,9 +8,9 @@ dashedName: fractran
 
 # --description--
 
-FRACTRAN is a Turing-complete esoteric programming language invented by the mathematician John Horton Conway.
+FRACTRAN — це повна за Тюрінгом езотерична мова програмування, яку винайшов математик Джон Гортон Конвей.
 
-Програма FRACTRAN є впорядкованим списком додатних дробів $P = (f_1, f_2, \\ldots, f_m)$, разом з початковим введенням додатного цілого числа $n$.
+Програма на FRACTRAN — це впорядкований список додатних дробів $P = (f_1, f_2, \\ldots, f_m)$ з початковим введенням цілого числа $n$.
 
 Програма запускається шляхом оновлення цілого числа $n$ наступним чином:
 
@@ -19,11 +19,11 @@ FRACTRAN is a Turing-complete esoteric programming language invented by the math
   <li>повторюйте це правило, поки жоден дріб в списку не видасть цілого числа при множенні на $n$, потім припиніть.</li>
 </ul>
 
-Конвей дав програму для простих чисел в FRACTRAN:
+Конвей надав програму на FRACTRAN для цілих чисел:
 
 $\\dfrac{17}{91}$, $\\dfrac{78}{85}$, $\\dfrac{19}{51}$, $\\dfrac{23}{38}$, $\\dfrac{29}{33}$, $\\dfrac{77}{29}$, $\\dfrac{95}{23}$, $\\dfrac{77}{19}$, $\\dfrac{1}{17}$, $\\dfrac{11}{13}$, $\\dfrac{13}{11}$, $\\dfrac{15}{14}$, $\\dfrac{15}{2}$, $\\dfrac{55}{1}$
 
-Починаючи з $n=2$, ця програма FRACTRAN змінить $n$ на 15=2\\times (\\frac{15}{2})$, потім $825=15\\t (\\frac{55}{1}$, генеруючи наступну послідовність цілих чисел:
+Починаючи з $n=2$, ця програма FRACTRAN змінить $n$ на $15=2\\times (\\frac{15}{2})$, тоді $825=15\\times (\\frac{55}{1})$, генеруючи наступну послідовність цілих чисел:
 
 $2$, $15$, $825$, $725$, $1925$, $2275$, $425$, $390$, $330$, $290$, $770$, $\\ldots$
 
@@ -31,11 +31,11 @@ $2$, $15$, $825$, $725$, $1925$, $2275$, $425$, $390$, $330$, $290$, $770$, $\\l
 
 $2^2=4$, $2^3=8$, $2^5=32$, $2^7=128$, $2^{11}=2048$, $2^{13}=8192$, $2^{17}=131072$, $2^{19}=524288$, $\\ldots$
 
-які є простими степенями від 2.
+які є простими степенями 2.
 
 # --instructions--
 
-Напишіть функцію, яка приймає програму fractran як рядковий параметр і повертає перші 10 номерів програми як масив. Якщо результат не містить 10 чисел, поверніть числа як є.
+Напишіть функцію, яка приймає програму на fractran як рядковий параметр та повертає перші 10 чисел програми як масив. Якщо результат не містить 10 чисел, поверніть числа як є.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/gamma-function.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/gamma-function.md
index 3c53ed7c97a..fca4442aba7 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/gamma-function.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/gamma-function.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7e76
-title: Gamma function
+title: Гамма-функція
 challengeType: 1
 forumTopicId: 302271
 dashedName: gamma-function
@@ -8,7 +8,7 @@ dashedName: gamma-function
 
 # --description--
 
-Implement one algorithm (or more) to compute the Gamma function (in the real field only).
+Реалізуйте один алгоритм (або більше) для обчислення гамма-функції (лише в полі дійсних чисел).
 
 Гамма-функція може бути визначена як:
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/gaussian-elimination.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/gaussian-elimination.md
index 1369bbbf298..0ba98063342 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/gaussian-elimination.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/gaussian-elimination.md
@@ -8,11 +8,11 @@ dashedName: gaussian-elimination
 
 # --description--
 
-Write a function to solve \\(Ax = b\\) using Gaussian elimination then backwards substitution.
+Напишіть функцію, щоб розв’язати \\(Ax = b\\), використавши метод Гауса та обернену підстановку.
 
-\\(A\\) є матрицею\\(n \\times n\\). Крім того, \\(x\\) та \\(b\\) є \\(n\\) за 1 вектором.
+\\(A\\) є матрицею \\(n \\times n\\). Крім того, вектори \\(x\\) та \\(b\\) мають розмірність \\(n\\) на 1.
 
-Для більшої точності використовуйте вибір ведучого елемента і масштабування.
+Для більшої точності використайте часткову перестановку і масштабування.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/general-fizzbuzz.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/general-fizzbuzz.md
index 1b1bfd7ffa4..652b42ab647 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/general-fizzbuzz.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/general-fizzbuzz.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7e78
-title: Спільний FizzBuzz
+title: Загальний FizzBuzz
 challengeType: 1
 forumTopicId: 302273
 dashedName: general-fizzbuzz
@@ -8,15 +8,15 @@ dashedName: general-fizzbuzz
 
 # --description--
 
-Write a generalized version of <a href="https://rosettacode.org/wiki/FizzBuzz" target="_blank" rel="noopener noreferrer nofollow">FizzBuzz</a> that works for any list of factors, along with their words.
+Напишіть узагальнену версію <a href="https://rosettacode.org/wiki/FizzBuzz" target="_blank" rel="noopener noreferrer nofollow">FizzBuzz</a>, яка працюватиме з будь-яким списком множників, а також слів.
 
-В основному, це реалізація "fizzbuzz", де надаються правила гри користувачу. Створіть функцію для реалізації цього. Функція повинна приймати два параметри.
+В основному, це реалізація fizzbuzz, де правила гри надаються користувачу. Створіть функцію, щоб реалізувати таку програму. Функція повинна приймати два параметри.
 
-Перший - масив із правилами FizzBuzz. До прикладу: `[ [3, "Fizz"] , [5, "Buzz"] ]`.
+Перший є масивом з правилами FizzBuzz. Наприклад, `[ [3, "Fizz"] , [5, "Buzz"] ]`.
 
-Це вказує на те, що потрібно вивести `Fizz`, якщо число кратне 3, і `Buzz` якщо воно кратне 5. Якщо у двох випадках число кратне, тоді рядки мають бути об'єднані в порядку вказаному в масиві. У цьому випадку `FizzBuzz` виконується якщо число ділиться на 3 і 5.
+Тобто, якщо число ділиться на 3, функція має повернути `Fizz`; якщо число ділиться на 5, функція має повернути `Buzz`. Якщо число діліться на обидва числа, рядки потрібно об’єднати за порядком, вказаним в масиві. У цьому випадку `FizzBuzz`, якщо число ділиться на 3 та 5.
 
-Другий параметр - це число, для якого функція повинна повернути рядок як зазначається вище.
+Другий параметр — це число, для якого функція має повернути рядок як вказано вище.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/generate-lower-case-ascii-alphabet.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/generate-lower-case-ascii-alphabet.md
index 46209b902dd..fc77be6c983 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/generate-lower-case-ascii-alphabet.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/generate-lower-case-ascii-alphabet.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7e7a
-title: Згенерувати нижній регістр ASCII абетки
+title: Алфавіт ASCII в нижньому регістрі
 challengeType: 1
 forumTopicId: 302274
 dashedName: generate-lower-case-ascii-alphabet
@@ -8,7 +8,7 @@ dashedName: generate-lower-case-ascii-alphabet
 
 # --description--
 
-Write a function to generate an array of lower case ASCII characters for a given range. For example, given the range `['a', 'd']`, the function should return `['a', 'b', 'c', 'd']`.
+Напишіть функцію, щоб згенерувати масив символів ASCII заданого діапазону в нижньому регістрі. Наприклад, якщо надано діапазон `['a', 'd']`, то функція має повернути `['a', 'b', 'c', 'd']`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/generator-exponential.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/generator-exponential.md
index 99526eda290..74cef2f4e2f 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/generator-exponential.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/generator-exponential.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7e7b
-title: Генератор/Експонента
+title: Генератор/експонента
 challengeType: 1
 forumTopicId: 302275
 dashedName: generatorexponential
@@ -8,19 +8,19 @@ dashedName: generatorexponential
 
 # --description--
 
-A generator is an executable entity (like a function or procedure) that contains code that yields a sequence of values, one at a time, so that each time you call the generator, the next value in the sequence is provided.
+Генератор — це виконуваний запис (такий як функція або процедура), що містить код, який генерує послідовність значень таким чином, що кожен раз, коли ви викликаєте генератор, надається наступне значення в послідовності.
 
-Генератори часто будуються поверх співпрограм або об'єктів, щоб внутрішній стан об'єкта оброблявся "природним чином".
+Генератори часто створюються на основі співпрограм або об’єктів, щоб внутрішній стан об’єкта оброблявся «природно».
 
-Генератори часто використовуються в ситуаціях, коли послідовність потенційно нескінченна, і де можливо побудувати наступне значення послідовності з лише мінімальним станом.
+Генератори часто використовуються в ситуаціях, коли послідовність потенційно нескінченна, та коли наступне значення послідовності можливо побудувати лише з мінімальним станом.
 
 # --instructions--
 
-Запишіть функцію, яка використовує генератори для створення квадратів і кубів. Створіть новий генератор, який відфільтрує всі куби з генератора квадратів.
+Напишіть функцію, яка використовує генератори для створення квадратів та кубів. Створіть новий генератор, який фільтрує всі куби з генератора квадратів.
 
-Функція має повернути \\( n^{th} \\) значення відфільтрованого генератора.
+Функція має повернути \\( n^{-не} \\) значення відфільтрованого генератора.
 
-Наприклад, для \\(n=7\\) має повернути 81, оскільки послідовність буде 4, 16, 25, 36, 49, 81. Тут число 64 відфільтровано, оскільки це куб.
+Наприклад, якщо \\(n=7\\), то функція має повернути 81, оскільки послідовністю буде 4, 9, 16, 25, 36, 49, 81. Число 64 відфільтроване, оскільки є кубом.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/gray-code.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/gray-code.md
index 65364671a0e..32e3178e8cb 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/gray-code.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/gray-code.md
@@ -10,15 +10,15 @@ dashedName: gray-code
 
 Gray code is a form of binary encoding where transitions between consecutive numbers differ by only one bit.
 
-Це корисне кодування для зменшення ризиків настання небезпеки для апаратних даних зі значеннями, що швидко змінюються та/або підключаються до повільнішого апаратного забезпечення як вхідних даних.
+This is a useful encoding for reducing hardware data hazards with values that change rapidly and/or connect to slower hardware as inputs.
 
-Це також корисно для створення вхідних даних для карт Карно в порядку зліва направо або зверху вниз.
+It is also useful for generating inputs for Karnaugh maps in order from left to right or top to bottom.
 
 # --instructions--
 
-Створіть функцію для кодування номера та декодування номера з коду Грея. Функція повинна мати 2 параметри.
+Create a function to encode a number to and decode a number from Gray code. Функція повинна мати 2 параметри.
 
-Перший - це логічний тип даних. Функція має кодувати true і декодувати false. Другим параметром буде число, яке потрібно закодувати/декодувати.
+The first would be a boolean. The function should encode for true and decode for false. The second parameter would be the number to be encoded/decoded.
 
 Поккажіть нормальні бінарні значення, значення коду Грея, і декодування даних коду Грея для всіх 5-бінарних чисел (0-31 включно, провідні нулі не є необхідними).
 
@@ -88,7 +88,7 @@ assert.equal(gray(false, 233), 177);
 assert.equal(gray(false, 381), 425);
 ```
 
-`gray(false,725)`має повернути `870`.
+`gray(false,725)` should return `870`.
 
 ```js
 assert.equal(gray(false, 725), 870);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/greatest-common-divisor.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/greatest-common-divisor.md
index 6deaa81f22b..b0d98655054 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/greatest-common-divisor.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/greatest-common-divisor.md
@@ -8,7 +8,7 @@ dashedName: greatest-common-divisor
 
 # --description--
 
-Write a function that returns the greatest common divisor of two integers.
+Напишіть функцію, яка повертає найбільший спільний дільник двох цілих чисел.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/greatest-subsequential-sum.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/greatest-subsequential-sum.md
index e6c198548ac..e44f39fda3d 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/greatest-subsequential-sum.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/greatest-subsequential-sum.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7e84
-title: Найбільша подальша сума
+title: Найбільша сума підпослідовності
 challengeType: 1
 forumTopicId: 302278
 dashedName: greatest-subsequential-sum
@@ -8,9 +8,9 @@ dashedName: greatest-subsequential-sum
 
 # --description--
 
-Given a sequence of integers, find a continuous subsequence which maximizes the sum of its elements, that is, the elements of no other single subsequence add up to a value larger than this one.
+Дано послідовність цілих чисел. Знайдіть неперервну підпослідовність, сума елементів якої є максимальною (тобто при додаванні елементів іншої підпослідовності не вийде більше значення).
 
-Порожня підпослідовність вважається сумою \\( 0 \\); таким чином, якщо всі елементи від'ємні, то результат повинен бути порожньою послідовністю.
+Вважається, що порожня підпослідовність має суму \\( 0 \\). Тому, якщо всі елементи є від’ємними, результат має бути порожньою послідовністю.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hailstone-sequence.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hailstone-sequence.md
index 5281abbdcdb..e4119fbb1c7 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hailstone-sequence.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hailstone-sequence.md
@@ -8,20 +8,20 @@ dashedName: hailstone-sequence
 
 # --description--
 
-The Hailstone sequence of numbers can be generated from a starting positive integer, `n` by:
+Сіракузьку послідовність можна утворити з початкового натурального числа `n` за такими правилами:
 
-- If `n` is `1` then the sequence ends
-- Якщо `n` дорівнює `even`, то наступне `n` послідовності `= n/2`
-- Якщо `n` дорівнює `odd`, то наступне `n` послідовності `= (3 * n) + 1`
+- Якщо `n` дорівнює `1`, то послідовність закінчується
+- Якщо `n` є `парним`, то наступне значення `n = n/2`
+- Якщо `n` є `непарним`, то наступне значення `n = (3 * n) + 1`
 
-Суть гіпотеза Коллатца (Недоведена): яке б початкове число ми б не взяли, Сіракузька послідовність завжди закінчується.
+Гіпотеза Коллатца (недоведена) полягає в тому, що Сіракузька послідовність з будь-яким початковим числом завжди закінчується.
 
-Сіракузька послідовність, також відома як числа-градини (бо графіки послідовностей схожі на траєкторію руху градин в атмосфері), або як послідовність Коллатца.
+Сіракузька послідовність також відома як числа-градини (оскільки значення зазвичай піддаються декільком зниженням і зростанням, що нагадує рух граду) або послідовність Коллатца.
 
 # --instructions--
 
-1. Create a routine to generate the hailstone sequence for a number
-2. Ваша функція має повертати масив з числом менше `limit`, яке має найдовшу Сіруказьку послідовність і довжину цієї послідовності. (Але не показуйте саму послідовність!)
+1. Створіть процедуру для генерації Сіракузької послідовності з числа
+2. Функція має повернути масив з числом меншим за `limit`, яке має найдовшу Сіракузьку послідовність, та довжиною цієї послідовності. (Але не показуйте саму послідовність!)
 
 # --hints--
 
@@ -31,25 +31,25 @@ The Hailstone sequence of numbers can be generated from a starting positive inte
 assert(typeof hailstoneSequence === 'function');
 ```
 
-`hailstoneSequence(30)` має повертати масив.
+`hailstoneSequence(30)` має повернути масив.
 
 ```js
 assert(Array.isArray(hailstoneSequence(30)));
 ```
 
-`hailstoneSequence(30)` має повертати `[27, 112]`.
+`hailstoneSequence(30)` має повернути `[27, 112]`.
 
 ```js
 assert.deepEqual(hailstoneSequence(30), [27, 112]);
 ```
 
-`hailstoneSequence(50000)` має повертати `[35655, 324]`.
+`hailstoneSequence(50000)` має повернути `[35655, 324]`.
 
 ```js
 assert.deepEqual(hailstoneSequence(50000), [35655, 324]);
 ```
 
-`hailstoneSequence(100000)` має повертати `[77031, 351]`.
+`hailstoneSequence(100000)` має повернути `[77031, 351]`.
 
 ```js
 assert.deepEqual(hailstoneSequence(100000), [77031, 351]);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/happy-numbers.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/happy-numbers.md
index eb7b3571497..d19a5fb2f40 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/happy-numbers.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/happy-numbers.md
@@ -8,13 +8,13 @@ dashedName: happy-numbers
 
 # --description--
 
-A happy number is defined by the following process:
+Щасливе число визначається наступним чином:
 
-Починаючи з будь-якого додатного цілого числа, замініть число на суму квадратів цифр і повторіть дію, доки число не буде дорівнювати `1` (де воно залишиться), або воно нескінченно буде повторюватися у циклі, який не включає `1`. Ті числа, для яких цей процес закінчується `1` є щасливими, а ті, для яких процес не закінчуються `1` є нещасливими.
+Починаючи з будь-якого натурального числа, замініть це число сумою квадратів його цифр, та повторюйте цю дію, поки число не дорівнюватиме `1` (де і залишиться) або нескінченно повторюватиметься в циклі, який не містить `1`. Числа, дія яких закінчується на `1`, є щасливими; числа, дія яких не закінчується на `1` є нещасливими.
 
 # --instructions--
 
-Реалізуйте функцію, що повертає правильне значення, у разі якщо число — щасливе, якщо воно є хибним, не робить цього.
+Реалізуйте функцію, яка повертає true, якщо число щасливе, та false, якщо навпаки.
 
 # --hints--
 
@@ -24,7 +24,7 @@ A happy number is defined by the following process:
 assert(typeof happy === 'function');
 ```
 
-`happy(1)` має повернути логічний тип.
+`happy(1)` має повернути булеве значення.
 
 ```js
 assert(typeof happy(1) === 'boolean');
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/harshad-or-niven-series.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/harshad-or-niven-series.md
index aec188daae6..4bb6f8f3a36 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/harshad-or-niven-series.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/harshad-or-niven-series.md
@@ -1,6 +1,6 @@
 ---
 id: 595668ca4cfe1af2fb9818d4
-title: Число Харшад або Нівена
+title: Число харшад, або число Нівена
 challengeType: 1
 forumTopicId: 302281
 dashedName: harshad-or-niven-series
@@ -8,17 +8,17 @@ dashedName: harshad-or-niven-series
 
 # --description--
 
-The Harshad or Niven numbers are positive integers ≥ 1 that are divisible by the sum of their digits.
+Число харшад, або число Нівена, — це натуральне число ≥ 1, яке ділиться на суму своїх цифр.
 
-Наприклад, `42` — це число Харшад, оскільки `42` ділиться на `(4 + 2)` без залишку.
+Наприклад, `42` є числом харшад, оскільки `42` ділиться на `(4 + 2)` без остачі.
 
-Припустимо, що серія визначається як числа в порядку збільшення.
+Припустимо, що послідовність визначена як числа в порядку зростання.
 
 # --instructions--
 
-Реалізація функції полягає в створенні послідовних членів порядку Харшаду.
+Реалізуйте функцію, щоб згенерувати послідовні члени послідовності харшад.
 
-Використовуйте його, щоб повернути масив з десятьма членами послідовності, починаючи з числа першого Харшада, більше ніж `n`.
+Використайте її, щоб повернути масив із десятьох членів послідовності, починаючи з першого числа харшад, більшого за `n`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hash-from-two-arrays.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hash-from-two-arrays.md
index 0e83d53341c..27589cc0010 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hash-from-two-arrays.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hash-from-two-arrays.md
@@ -8,7 +8,7 @@ dashedName: hash-from-two-arrays
 
 # --description--
 
-Given two arrays, create a hash object where the elements from one array (the keys) are linked to the elements of the other (the values).
+Дано два масиви. Створіть хеш-об’єкт, де елементи одного масиву (ключі) з’єднані з елементами іншого масиву (значення).
 
 Наприклад:
 
@@ -18,7 +18,7 @@ const secondArr = ["a", "b", "c"];
 const hashObj = arrToObj(firstArr, secondArr);
 ```
 
-Хеш-об’єкт, створений із наведених вище масивів, буде `{1: "a", 2: "b", 3: "c"}`.
+Хеш-об’єктом, створеним з двох масивів вище, буде `{1: "a", 2: "b", 3: "c"}`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hash-join.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hash-join.md
index b7bf505a308..46d5339e848 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hash-join.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hash-join.md
@@ -1,6 +1,6 @@
 ---
 id: 5956795bc9e2c415eb244de1
-title: Хеш-приєднання
+title: Hash join
 challengeType: 1
 forumTopicId: 302284
 dashedName: hash-join
@@ -10,7 +10,7 @@ dashedName: hash-join
 
 An inner join is an operation that combines two data tables into one table, based on matching column values. The simplest way of implementing this operation is the nested loop join algorithm, but a more scalable alternative is the hash join algorithm.
 
-Алгоритм "хеш-приєднання" складається з двох кроків:
+The "hash join" algorithm consists of two steps:
 
 <ol>
   <li><strong>Hash phase:</strong> Create a multimap from one of the two tables, mapping from each join column value to all the rows that contain it.</li>
@@ -52,7 +52,7 @@ An inner join is an operation that combines two data tables into one table, base
           <td style="border:none">
             <table>
               <tr>
-                <th style="padding: 4px; margin: 5px;">Вік</th>
+                <th style="padding: 4px; margin: 5px;">Age</th>
                 <th style="padding: 4px; margin: 5px;">Ім’я</th>
               </tr>
               <tr>
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/heronian-triangles.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/heronian-triangles.md
index 69b55cf67e7..e58d517c99d 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/heronian-triangles.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/heronian-triangles.md
@@ -8,29 +8,29 @@ dashedName: heronian-triangles
 
 # --description--
 
-Hero's formula for the area of a triangle given the length of its three sides `a`, `b`, and `c` is given by:
+Формула Герона для визначення площі трикутника за даними довжинами трьох його сторін `a`, `b` та `c` задана як:
 
 $A = \\sqrt{s(s-a)(s-b)(s-c)},$
 
-де `s` є половиною периметра трикутника; тобто
+де `s` є півпериметром трикутника; тому
 
-$s=\\frac{a+b+c}{2}
+$s=\\frac{a+b+c}{2}.$
 
-Трикутники Героніа — це трикутники, у яких усі сторони та площа є цілими числами.
+Трикутники Герона — це трикутники, сторони та площа яких є цілими числами.
 
-Прикладом є трикутник зі сторонами `3, 4, 5`, площа якого дорівнює `6` (а периметр – `12`).
+Прикладом є трикутник зі сторонами `3, 4, 5`, площа якого дорівнює `6` (а периметр становить `12`).
 
-Зверніть увагу, що будь-який трикутник, усі сторони якого є цілим кратним `3, 4, 5`; такі, як `6, 8, 10,`, також буде трикутником Герона.
+Зверніть увагу, що будь-який трикутник, сторони якого кратні числам `3, 4, 5` (наприклад, `6, 8, 10`), також є трикутником Герона.
 
-Визначте примітивний трикутник Герона як трикутник Герона, де найбільший спільний дільник
+Визначимо примітивний трикутник Герона як трикутник Герона, де найбільшим спільним дільником
 
-усіх трьох сторін дорівнює `1` (єдність).
+всіх трьох сторін є `1` (одиниця).
 
-Це виключає, наприклад, трикутник `6, 8, 10.`
+Це вилучить, наприклад, трикутник `6, 8, 10`.
 
 # --instructions--
 
-Реалізуйте функцію, засновану на формулі Герона, яка повертає перші <code>n<sub>th</sub></code> впорядковані трикутники у масиві масивів.
+Реалізуйте функцію на основі формули Герона, яка повертає перші `n` впорядкованих трикутників в масиві масивів.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hofstadter-figure-figure-sequences.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hofstadter-figure-figure-sequences.md
index 1ad02ef0ae1..612a4facf08 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hofstadter-figure-figure-sequences.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hofstadter-figure-figure-sequences.md
@@ -8,7 +8,7 @@ dashedName: hofstadter-figure-figure-sequences
 
 # --description--
 
-The Hofstadter Figure-Figure sequences $R_n$ and $S_n$ are given by
+Послідовності рисунок-рисунок Хофштадтера $R_n$ та $S_n$ задані як
 
 $R_1 = 1\\ ;\\ S_1 = 2 \\\\R_n = R_{n-1} + S_{n-1}, \\quad n>1.$
 
@@ -20,15 +20,15 @@ $R_1 = 1\\ ;\\ S_1 = 2 \\\\R_n = R_{n-1} + S_{n-1}, \\quad n>1.$
 
 <pre>2, 4, 5, 6, 8, ...</pre>
 
-Послідовність $R_n$ визначається рекурентним співвідношенням $R_n = R_{n-1} + S_{n-1}$, тоді як $S_n$ визначається як послідовність натуральних чисел, які не входять до послідовності $R_n$.
+Послідовність $R_n$ визначена рекурентним співвідношенням $R_n = R_{n-1} + S_{n-1}$, тоді як $S_n$ визначена як послідовність натуральних чисел, які не входять до послідовності $R_n$.
 
 # --instructions--
 
-Створіть дві функції з іменами `ffr` та `ffs`, які повертають `R(n)` або `S(n)`, відповідно, для будь-якого індексу `n`. Зауважте, що послідовності малюнок-малюнок Хофштадтера індексовані з 1, де $R_1 = 1$ та $S_1 = 2$.
+Створіть дві функції під назвою `ffr` та `ffs`, які відповідно повертають `R(n)` чи `S(n)` за будь-якого індексу `n`. Зауважте, що індекс послідовностей рисунок-рисунок Хофштадтера починається з 1, де $R_1 = 1$ та $S_1 = 2$.
 
-Не слід припускати жодного максимального значення для ` n `.
+Не припускайте жодного максимального значення для `n`.
 
-**Посилання**<p>Rosetta: <a href='https://rosettacode.org/wiki/Hofstadter_Figure-Figure_sequences' target='_blank'> Послідовність Хофштадтера</a></p>.
+**Список літератури**<p>Rosetta: <a href='https://rosettacode.org/wiki/Hofstadter_Figure-Figure_sequences' target='_blank'>послідовності рисунок-рисунок Хофштадтера</a></p>.
 
 
 # --hints--
@@ -45,37 +45,37 @@ assert(typeof ffr === 'function');
 assert(typeof ffs === 'function');
 ```
 
-`ffr` повинен повернути ціле число.
+`ffr` має повернути ціле число.
 
 ```js
 assert(Number.isInteger(ffr(1)));
 ```
 
-`ffs` повинен повернути ціле число.
+`ffs` має повернути ціле число.
 
 ```js
 assert(Number.isInteger(ffs(1)));
 ```
 
-`ffr(10)` повинен повертати `69`
+`ffr(10)` має повернути `69`
 
 ```js
 assert.equal(ffr(ffrParamRes[0][0]), ffrParamRes[0][1]);
 ```
 
-`ffr(50)` повинен повертати `1509`
+`ffr(50)` має повернути `1509`
 
 ```js
 assert.equal(ffr(ffrParamRes[1][0]), ffrParamRes[1][1]);
 ```
 
-`ffr(100)` повинен повертати `5764`
+`ffr(100)` має повернути `5764`
 
 ```js
 assert.equal(ffr(ffrParamRes[2][0]), ffrParamRes[2][1]);
 ```
 
-`ffr(1000)` повинен повертати `526334`
+`ffr(1000)` має повернути `526334`
 
 ```js
 assert.equal(ffr(ffrParamRes[3][0]), ffrParamRes[3][1]);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hofstadter-q-sequence.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hofstadter-q-sequence.md
index b9ec0a18c09..995d0acdf3c 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hofstadter-q-sequence.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/hofstadter-q-sequence.md
@@ -1,6 +1,6 @@
 ---
 id: 59637c4d89f6786115efd814
-title: Q послідовність Гофстедтера
+title: Послідовність Хофштадтера Q
 challengeType: 1
 forumTopicId: 302287
 dashedName: hofstadter-q-sequence
@@ -8,15 +8,15 @@ dashedName: hofstadter-q-sequence
 
 # --description--
 
-The Hofstadter Q sequence is defined as:
+Послідовність Хофштадтера Q визначена як:
 
 $Q(1)=Q(2)=1, \\\\ Q(n)=Q\\big(n-Q(n-1)\\big)+Q\\big(n-Q(n-2)), \\quad n>2.$
 
-Вона визначається як послідовність Фібоначчі, але в той час як наступний член у послідовності Фібоначчі є сумою попередніх двох членів, у послідовності Q попередні два члени вказують на те, як далеко треба повернутися назад в послідовності Q, щоб знайти два числа, які потрібно підсумувати, щоб утворити наступний член послідовності.
+Вона визначається як послідовність Фібоначчі, але в той час як наступний член у послідовності Фібоначчі є сумою попередніх двох членів, у послідовності Q попередні два члени вказують на те, як далеко треба повернутися назад в послідовності Q, щоб знайти два числа, які потрібно додати, щоб утворити наступний член послідовності.
 
 # --instructions--
 
-Реалізуйте рівняння Q послідовності Гофстедтера в якості функції. Функція має прийняти число, `n` та повернути ціле число.
+Реалізуйте рівняння послідовності Хофштадтера Q як функцію. Функція має приймати число `n` та повернути ціле число.
 
 # --hints--
 
@@ -26,7 +26,7 @@ $Q(1)=Q(2)=1, \\\\ Q(n)=Q\\big(n-Q(n-1)\\big)+Q\\big(n-Q(n-2)), \\quad n>2.$
 assert(typeof hofstadterQ === 'function');
 ```
 
-`hofstadterQ()` має повернути `integer`
+`hofstadterQ()` має повернути ціле число.
 
 ```js
 assert(Number.isInteger(hofstadterQ(1000)));
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/i-before-e-except-after-c.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/i-before-e-except-after-c.md
index eb7903a849f..2f103b4a9bf 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/i-before-e-except-after-c.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/i-before-e-except-after-c.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7eb0
-title: 'І перед Е (виняток: окрім після С)'
+title: Правило «I before E except after C»
 challengeType: 1
 forumTopicId: 302288
 dashedName: i-before-e-except-after-c
@@ -8,24 +8,24 @@ dashedName: i-before-e-except-after-c
 
 # --description--
 
-**<a href="http://www.rosettacode.org/wiki/I_before_E_except_after_C" target="_blank" rel="noopener noreferrer nofollow">"I before E, except after C"</a>** is a general rule for English language spelling. If one is unsure whether a word is spelled with the digraph `ei` or `ie`, the rhyme suggests that the correct order is `ie` unless the preceding letter is `c`, in which case it may be `ei`.
+**<a href="http://www.rosettacode.org/wiki/I_before_E_except_after_C" target="_blank" rel="noopener noreferrer nofollow">«I before E, except after C»</a>** — це загальне правило для вимови в англійській мові. Якщо ви не впевнені, як правильно писати слово: `ei` чи `ie`, то рима вказує на те, що правильний порядок `ie`. Але, якщо перед цими літерами стоїть `c`, то може бути `ei`.
 
-Використовуючи надані слова, перевірте, чи два підпункти фрази переконливі окремо:
+Використовуючи надані слова, перевірте, чи два підпункти фрази правдиві:
 
 <ol>
   <li>
-    <i>"I before E when not preceded by C".</i>
+    <i>«I before E when not preceded by C» (укр. «I перед E, але перед C»).</i>
   </li>
   <li>
-    <i>"E до того, коли перед мною передувала С".</i>
+    <i>«E before I when preceded by C» (укр. «E перед I, але після C»).</i>
   </li>
 </ol>
 
-Вихідна фраза є правдоподібною, якщо обидві субфрази правдоподібні.
+Якщо обидва підпункти правдиві, то початкова фраза також правдива.
 
 # --instructions--
 
-Напишіть функцію, яка допускає слово і перевірте, чи воно підлягає правилу. Якщо слово підлягає правилу, то функція успішна, якщо ні - функція хибна.
+Напишіть функцію, яка приймає слово і перевіряє, чи воно відповідає правилу. Функція має повернути true, якщо слово відповідає правилу, або false, якщо навпаки.
 
 # --hints--
 
@@ -35,43 +35,43 @@ dashedName: i-before-e-except-after-c
 assert(typeof IBeforeExceptC == 'function');
 ```
 
-`IBeforeExceptC("receive")` має повертати булеве значення.
+`IBeforeExceptC("receive")` має повернути булеве значення.
 
 ```js
 assert(typeof IBeforeExceptC('receive') == 'boolean');
 ```
 
-`IBeforeExceptC("receive")` має повертати `true`.
+`IBeforeExceptC("receive")` має повернути `true`.
 
 ```js
 assert.equal(IBeforeExceptC('receive'), true);
 ```
 
-`IBeforeExceptC("science")` має повертати `false`.
+`IBeforeExceptC("science")` має повернути `false`.
 
 ```js
 assert.equal(IBeforeExceptC('science'), false);
 ```
 
-`IBeforeExceptC("imperceivable")` має повертати `true`.
+`IBeforeExceptC("imperceivable")` має повернути `true`.
 
 ```js
 assert.equal(IBeforeExceptC('imperceivable'), true);
 ```
 
-`IBeforeExceptC("inconceivable")` має повертати `true`.
+`IBeforeExceptC("inconceivable")` має повернути `true`.
 
 ```js
 assert.equal(IBeforeExceptC('inconceivable'), true);
 ```
 
-`IBeforeExceptC("insufficient")` має повертати `false`.
+`IBeforeExceptC("insufficient")` має повернути `false`.
 
 ```js
 assert.equal(IBeforeExceptC('insufficient'), false);
 ```
 
-`IBeforeExceptC("omniscient")` має повертати `false`.
+`IBeforeExceptC("omniscient")` має повернути `false`.
 
 ```js
 assert.equal(IBeforeExceptC('omniscient'), false);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/iban.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/iban.md
index 9e355c06e5f..4c9804233e6 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/iban.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/iban.md
@@ -8,9 +8,9 @@ dashedName: iban
 
 # --description--
 
-The International Bank Account Number (IBAN) is an internationally agreed means of identifying bank accounts across national borders with a reduced risk of propagating transcription errors.
+Міжнародний номер банківського рахунку (IBAN) — це міжнародно узгоджений спосіб ідентифікації міжбанківських рахунків зі зниженим ризиком поширення помилок записів.
 
-<abbr title="Міжнародний номер банківського рахунку">IBAN</abbr> складається аж до 34 буквено-цифрових символів:
+Довжина <abbr title="International Bank Account Number">IBAN</abbr> не може перевищувати 34 алфавітно-цифрові знаки:
 
 <ul>
   <li>перші дві літери позначають код країни за <abbr title="International Organization for Standardization">ISO</abbr> 3166-1 alpha-2</li>
@@ -18,11 +18,11 @@ The International Bank Account Number (IBAN) is an internationally agreed means
   <li>внутрішньодержавний номер рахунку (BBAN).</li>
 </ul>
 
-Контрольні цифри дають змогу перевірити правильність номеру банківського рахунку, щоб підтвердити його цілісність навіть перед поданням транзакції.
+Контрольні числа дозволяють здійснити перевірку номеру рахунку, щоб підтвердити його цілісність перед транзакцією.
 
 # --instructions--
 
-Напишіть функцію, яка приймає рядок IBAN як параметр. Якщо вона допустима, поверніть true. Якщо ні, поверніть false.
+Напишіть функцію, яка приймає рядок IBAN як параметр. Якщо він дійсний, то поверніть true. Якщо ні — поверніть false.
 
 # --hints--
 
@@ -32,7 +32,7 @@ The International Bank Account Number (IBAN) is an internationally agreed means
 assert(typeof isValid == 'function');
 ```
 
-`isValid("GB82 WEST 1234 5698 7654 32")` має повернути логічне значення.
+`isValid("GB82 WEST 1234 5698 7654 32")` має повернути булеве значення.
 
 ```js
 assert(typeof isValid('GB82 WEST 1234 5698 7654 32') == 'boolean');
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/identity-matrix.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/identity-matrix.md
index eb5801d3ad9..452943012c2 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/identity-matrix.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/identity-matrix.md
@@ -8,7 +8,7 @@ dashedName: identity-matrix
 
 # --description--
 
-An *identity matrix* is a square matrix of size \\( n \\times n \\), where the diagonal elements are all `1`s (ones), and all the other elements are all `0`s (zeroes).
+*Одинична матриця* — це квадратна матриця розміром \\( n \\times n \\), де всі діагональні елементи є `1` (одиницями), а всі інші елементи є `0` (нулями).
 
 <ul>
   <li style='list-style: none;'>\(\displaystyle I_{n}=\begin{bmatrix} 1 &#x26; 0 &#x26; 0 \cr 0 &#x26; 1 &#x26; 0 \cr 0 &#x26; 0 &#x26; 1 \cr \end{bmatrix}\)</li>
@@ -16,7 +16,7 @@ An *identity matrix* is a square matrix of size \\( n \\times n \\), where the d
 
 # --instructions--
 
-Напишіть функцію, яка приймає число `n` як параметр і повертає одиничну матрицю порядку \\( n \\times n \\).
+Напишіть функцію, яка приймає число `n` як параметр та повертає одиничну матрицю порядку \\( n \\times n \\).
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/iterated-digits-squaring.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/iterated-digits-squaring.md
index 9f1b2f161f6..a1407a6b262 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/iterated-digits-squaring.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/iterated-digits-squaring.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7ec1
-title: Ітерація цифр квадрату числа
+title: Ітерація цифрових квадратів
 challengeType: 1
 forumTopicId: 302291
 dashedName: iterated-digits-squaring
@@ -8,7 +8,7 @@ dashedName: iterated-digits-squaring
 
 # --description--
 
-If you add the square of the digits of a Natural number (an integer bigger than zero), you always end with either 1 or 89:
+Якщо додати квадрат цифр натурального числа (ціле число більше за нуль), то в результаті ви завжди отримаєте або 1, або 89:
 
 <pre>15 -> 26 -> 40 -> 16 -> 37 -> 58 -> 89
 7 -> 49 -> 97 -> 130 -> 10 -> 1
@@ -16,7 +16,7 @@ If you add the square of the digits of a Natural number (an integer bigger than
 
 # --instructions--
 
-Напишіть функцію, яка використовує число як параметр, і видає 1 або 89 після виконання описаного процесу.
+Напишіть функцію, яка приймає число як параметр та повертає 1 або 89 після виконання описаного процесу.
 
 # --hints--
 
@@ -26,43 +26,43 @@ If you add the square of the digits of a Natural number (an integer bigger than
 assert(typeof iteratedSquare == 'function');
 ```
 
-`iteratedSquare(4)` має повертати число.
+`iteratedSquare(4)` має повернути число.
 
 ```js
 assert(typeof iteratedSquare(4) == 'number');
 ```
 
-`iteratedSquare(4)` має повертати `89`.
+`iteratedSquare(4)` має повернути `89`.
 
 ```js
 assert.equal(iteratedSquare(4), 89);
 ```
 
-`iteratedSquare(7)` має повертати`1`.
+`iteratedSquare(7)` має повернути `1`.
 
 ```js
 assert.equal(iteratedSquare(7), 1);
 ```
 
-`iteratedSquare(15)` має повертати`89`.
+`iteratedSquare(15)` має повернути `89`.
 
 ```js
 assert.equal(iteratedSquare(15), 89);
 ```
 
-`iteratedSquare(20)` має повертати`89`.
+`iteratedSquare(20)` має повернути `89`.
 
 ```js
 assert.equal(iteratedSquare(20), 89);
 ```
 
-`iteratedSquare(70)` має повертати`1`.
+`iteratedSquare(70)` має повернути `1`.
 
 ```js
 assert.equal(iteratedSquare(70), 1);
 ```
 
-`iteratedSquare(100)` має повертати`1`.
+`iteratedSquare(100)` має повернути `1`.
 
 ```js
 assert.equal(iteratedSquare(100), 1);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/jaro-distance.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/jaro-distance.md
index 4f942b934c3..37228090bff 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/jaro-distance.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/jaro-distance.md
@@ -8,13 +8,13 @@ dashedName: jaro-distance
 
 # --description--
 
-The Jaro distance is a measure of similarity between two strings. The higher the Jaro distance for two strings is, the more similar the strings are. The score is normalized such that `0` equates to no similarity and `1` is an exact match.
+Подібність Джаро — це міра схожості між двома рядками. Чим більший показник подібності Джаро для двох рядків, тим більше вони схожі. Якщо показник дорівнює `0`, то схожості немає; якщо `1`, то схожість точна.
 
 **Визначення**
 
-Подібність Джаро \\( d_j \\) з двох вибраних рядків \\((\\1\\) і \\(s_2\\) є
+Подібність Джаро \\( d_j \\) для двох наданих рядків \\(s_1\\) та \\(s_2\\):
 
-\\begin{align}d_j = \\begin{cases}0& & \\text{if }m=0 \\\\\\\\{\\frac {1}{3}}\\left({\\frac {m}{|s\_{1}|}}+{\\frac {m}{|s\_{2}|}}+{\\frac {m-t}{m}}\\right)& & \\text{otherwise}\\end{cases}\\end{align}
+\\begin{align}d_j = \\begin{cases}0& & \\text{якщо }m=0 \\\\\\\\{\\frac {1}{3}}\\left({\\frac {m}{|s\_{1}|}}+{\\frac {m}{|s\_{2}|}}+{\\frac {m-t}{m}}\\right)& & \\text{в іншому випадку}\\end{cases}\\end{align}
 
 Де:
 
@@ -23,13 +23,13 @@ The Jaro distance is a measure of similarity between two strings. The higher the
   <li> \(t\) є половиною кількості <i>транспозицій</i>.</li>
 </ul>
 
-Два символи з \\(s_1\\) та \\(s_2\\) відповідно, вважаються *співпадінням*, якщо вони однакові і розташовані не далі, ніж \\(\\left\\lfloor\\frac{\\max(|s_1|, s_2|)}{2}\\right\\rfloor-1\\).
+Два символи з \\(s_1\\) та \\(s_2\\) вважаються *однаковими*, якщо вони ідентичні та розташовані не далі, ніж \\(\\left\\lfloor\\frac{\\max(|s_1|,|s_2|)}{2}\\right\\rfloor-1\\).
 
-Кожен символ \\(s_1\\) порівнюється з усіма відповідними символами у \\(s_2\\) . Кількість відповідних (але в різному порядку) символів, розділених на 2, визначає кількість * транспозицій *.
+Кожен символ з \\(s_1\\) порівнюють з усіма однаковими символами з \\(s_2\\). Кількість однакових символів (але в різному порядку), поділена на 2, визначає кількість *транспозицій*.
 
 **Наприклад**
 
-У рядках \\(s_1\\) *DWAYNE* та \\(s_2\\) *DUANE* виявили:
+Дано рядки \\(s_1\\) *DWAYNE* та \\(s_2\\) *DUANE*, тому:
 
 <ul>
   <li>\(m = 4\)</li>
@@ -38,11 +38,11 @@ The Jaro distance is a measure of similarity between two strings. The higher the
   <li>\(t = 0\)</li>
 </ul>
 
-Ми знайшли: \\(d_j = \\frac{1}{3}\\left(\\frac{4}{6} + \\frac{4}{5} + \\frac{4-0}{4}\\right) = 0.822\\).
+Знайдемо показник Джаро: \\(d_j = \\frac{1}{3}\\left(\\frac{4}{6} + \\frac{4}{5} + \\frac{4-0}{4}\\right) = 0.822\\).
 
 # --instructions--
 
-Напишіть функцію а, у параметрах встановіть дві рядки. Це має бути схоже на подібність Джаро.
+Напишіть функцію, яка приймає два рядки як параметри та повертає подібність Джаро.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/jortsort.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/jortsort.md
index 1a04d2d2cac..93a058c7e9c 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/jortsort.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/jortsort.md
@@ -8,7 +8,7 @@ dashedName: jortsort
 
 # --description--
 
-jortSort is a sorting toolset that makes the user do the work and guarantees efficiency because you don't have to sort ever again. It was originally presented by Jenn "Moneydollars" Schiffer at the prestigious JSConf2014.
+jortSort — це набір інструментів для сортування, за допомогою яких користувач виконує роботу, і гарантує ефективність, оскільки більше не доведеться сортувати. Вперше цей набір був представлений Дженн Шиффер на престижній конференції JSConf2014.
 
 jortSort має бути функцією, яка приймає масив порівнюваних об’єктів як аргумент. Потім вона сортує масив у порядку зростання та порівнює відсортований масив з початковим масивом. Якщо масиви збігаються (тобто початковий масив вже був відсортований), функція повертає true. Якщо масиви не збігаються (тобто вихідний масив не був відсортований), функція повертає false.
 
@@ -20,7 +20,7 @@ jortSort має бути функцією, яка приймає масив по
 assert(typeof jortsort == 'function');
 ```
 
-`jortsort([1,2,3,4,5])` має повернути boolean.
+`jortsort([1,2,3,4,5])` має повернути булеве значення.
 
 ```js
 assert(typeof jortsort([1, 2, 3, 4, 5]) == 'boolean');
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/josephus-problem.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/josephus-problem.md
index 20a5131dabb..8700138a074 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/josephus-problem.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/josephus-problem.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7ec5
-title: Задача Йосифа Флавія
+title: Задача Йосипа Флавія
 challengeType: 1
 forumTopicId: 302294
 dashedName: josephus-problem
@@ -8,25 +8,25 @@ dashedName: josephus-problem
 
 # --description--
 
-Josephus problem is a math puzzle with a grim description: $n$ prisoners are standing on a circle, sequentially numbered from $0$ to $n-1$.
+Задача Йосипа Флавія — це математична головоломка зі зловісною умовою: у колі стоять $n$ в’язнів, послідовно пронумерованих від $0$ до $n-1$.
 
-Кат йде по колу, починаючи від ув’язненого $0$, виводить кожного $k$-го ув’язненого і вбиває його.
+Екзекутор ходить по колу. Він починає з в’язня під номером $0$, забирає із собою кожного $k$-го в’язня та вбиває його.
 
-З часом, коло стає все меншим і меншим, поки не залишиться лише один в’язень, якого потім відпускають.
+Коло стає все меншим і меншим, поки не залишиться лише один в’язень, якого потім відпускають.
 
-Наприклад, якщо є $n = 5$ ув'язнених і $k = 2$, порядок вбивства в'язнів (назвемо це "послідовністю вбивств") буде 1, 3, 0 і 4, а вцілілий буде #2.
+Наприклад, якщо $n=5$ та $k=2$, то порядком вбитих в’язнів (назвемо це «послідовністю вбивств») буде 1, 3, 0 та 4, а №2 залишиться живим.
 
-Враховуючи будь-які $n, k > 0$, дізнайтеся, хто з ув'язнених виживе.
+Дізнайтеся, хто з в’язнів виживе за будь-яких $n, k > 0$.
 
-В одному з таких випадків було 41 ув'язнених, а кожен 3 <sup>rd</sup> в'язень був убитий ($k=3$).
+В одному з таких випадків був 41 в’язень, а кожен 3<sup>-ій</sup> був вбитий ($k=3$).
 
-Серед них був розумний хлопець на ім'я Йосип, який вирішив цю задачу, та обрав виграшну позицію, а згодом постійно розповідав про це.
+Серед них був розумний хлопець Йосип, який розв’язав цю задачу та обрав виграшну позицію, а згодом постійно розповідав про це.
 
-Який номер він обрав?
+Який номер він вибрав?
 
 # --instructions--
 
-Напишіть функцію, яка бере початкову кількість ув’язнених та `k` як параметри і повертає номер в’язня, який вижив.
+Напишіть функцію, яка приймає початкову кількість в’язнів та `k` як параметри і повертає номер в’язня, який виживе.
 
 # --hints--
 
@@ -36,7 +36,7 @@ Josephus problem is a math puzzle with a grim description: $n$ prisoners are sta
 assert(typeof josephus == 'function');
 ```
 
-`josephus(30,3)` повинен повернути число.
+`josephus(30,3)` має повернути число.
 
 ```js
 assert(typeof josephus(30, 3) == 'number');
@@ -54,19 +54,19 @@ assert.equal(josephus(30, 3), 28);
 assert.equal(josephus(30, 5), 2);
 ```
 
-`josephus(20,2)` повинен повернути `8`.
+`josephus(20,2)` має повернути `8`.
 
 ```js
 assert.equal(josephus(20, 2), 8);
 ```
 
-`josephus(17,6)` повинен повернути `1`.
+`josephus(17,6)` має повернути `1`.
 
 ```js
 assert.equal(josephus(17, 6), 1);
 ```
 
-`josephus(29,4)` повинен повернути `1`.
+`josephus(29,4)` має повернути `1`.
 
 ```js
 assert.equal(josephus(29, 4), 1);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/k-d-tree.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/k-d-tree.md
index 122f3b32e1c..d81a07b4d36 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/k-d-tree.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/k-d-tree.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7ecb
-title: K-d дерево
+title: К-вимірне дерево
 challengeType: 1
 forumTopicId: 302295
 dashedName: k-d-tree
@@ -8,11 +8,11 @@ dashedName: k-d-tree
 
 # --description--
 
-A k-d tree (short for *k*-dimensional tree) is a space-partitioning data structure for organizing points in a k-dimensional space. k-d trees are a useful data structure for several applications, such as searches involving a multidimensional search key (e.g. range searches and nearest neighbor searches). k-d trees are a special case of binary space partitioning trees. k-d trees are not suitable, however, for efficiently finding the nearest neighbor in high dimensional spaces. As a general rule, if the dimensionality is *k*, the number of points in the data, *N*, should be *N* ≫ 2<sup><i>k</i></sup>. Otherwise, when k-d trees are used with high-dimensional data, most of the points in the tree will be evaluated and the efficiency is no better than exhaustive search, and other methods such as approximate nearest-neighbor are used instead.
+К-вимірне дерево — це структура даних, яка розділяє простір для організації точок у k-вимірному просторі. К-вимірні дерева є корисною структурою даних для декількох застосувань, серед яких пошуки з використанням багатовимірного ключа пошуку (наприклад, пошуки в діапазоні та пошуки найближчого сусіда). К-вимірні дерева є особливим випадком дерев двійкового поділу простору. Однак k-вимірні дерева не підходять для ефективного пошуку найближчого сусіда в просторах високої розмірності. Як правило, якщо розмірність дорівнює *k*, то кількістю точок в даних має бути *N* ≫ 2<sup><i>k</i></sup>. В іншому випадку, коли k-вимірні дерева використовуються з високорозмірними даними, то більшість точок в дереві будуть оцінені, і ефективність не буде кращою за пошук методом повного перебору, а натомість буде використано інші методи, такі як приблизний пошук найближчого сусіда.
 
 # --instructions--
 
-Напишіть функцію, яка виконає пошук найближчого сусіда за допомогою k-d дерева. Функція потребує два параметри: масив k-вимірних точок і одну k-вимірну точку, найближчий сусід якої має бути виданий функцією. K-вимірна точка буде дана як набір k-елементів.
+Напишіть функцію, щоб виконати пошук найближчого сусіда за допомогою k-вимірного дерева. Функція приймає два параметри: масив k-вимірних точок і одну k-вимірну точку, найближчого сусіда якої має повернути функція. K-вимірна точка буде надана як масив з k елементів.
 
 # --hints--
 
@@ -42,7 +42,7 @@ assert(
 );
 ```
 
-`kdNN([[[2, 3], [5, 4], [9, 6], [4, 7], [8, 1], [7, 2]], [9, 2])` має повернути масив.
+`kdNN([[[2, 3], [5, 4], [9, 6], [4, 7], [8, 1], [7, 2]], [9, 2])` має повернути `[ 8, 1 ]`.
 
 ```js
 assert.deepEqual(
@@ -61,7 +61,7 @@ assert.deepEqual(
 );
 ```
 
-`kdNN([[[2, 3], [5, 4], [9, 6], [4, 7], [8, 1], [7, 2]], [9, 2])` має повернути масив.
+`kdNN([[[2, 3], [5, 4], [9, 6], [4, 7], [8, 1], [7, 2]], [7, 1])` має повернути `[ 8, 1 ]`.
 
 ```js
 assert.deepEqual(
@@ -80,7 +80,7 @@ assert.deepEqual(
 );
 ```
 
-`kdNN([[[2, 3], [5, 4], [9, 6], [4, 7], [8, 1], [7, 2]], [9, 2])` має повернути масив.
+`kdNN([[[2, 3], [5, 4], [9, 6], [4, 7], [8, 1], [7, 2]], [3, 2])` має повернути `[ 2, 3 ]`.
 
 ```js
 assert.deepEqual(
@@ -99,7 +99,7 @@ assert.deepEqual(
 );
 ```
 
-`kdNN([[[2, 3], [5, 4], [9, 6], [4, 7], [8, 1], [7, 2]], [9, 2])` має повернути масив.
+`kdNN([[2, 3, 1], [9, 4, 5], [4, 6, 7], [1, 2, 5], [7, 8, 9], [3, 6, 1]], [1, 2, 3])` має повернути `[ 1, 2, 5 ]`.
 
 ```js
 assert.deepEqual(
@@ -118,7 +118,7 @@ assert.deepEqual(
 );
 ```
 
-`kdNN([[[2, 3], [5, 4], [9, 6], [4, 7], [8, 1], [7, 2]], [9, 2])` має повернути масив.
+`kdNN([[2, 3, 1], [9, 4, 5], [4, 6, 7], [1, 2, 5], [7, 8, 9], [3, 6, 1]], [4, 5, 6])` має повернути `[ 4, 6, 7 ]`.
 
 ```js
 assert.deepEqual(
@@ -137,7 +137,7 @@ assert.deepEqual(
 );
 ```
 
-`kdNN([[[2, 3], [5, 4], [9, 6], [4, 7], [8, 1], [7, 2]], [9, 2])` має повернути масив.
+`kdNN([[2, 3, 1], [9, 4, 5], [4, 6, 7], [1, 2, 5], [7, 8, 9], [3, 6, 1]], [8, 8, 8])` має повернути `[ 7, 8, 9 ]`.
 
 ```js
 assert.deepEqual(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/kaprekar-numbers.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/kaprekar-numbers.md
index 74a6a432707..ad3350a9c86 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/kaprekar-numbers.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/kaprekar-numbers.md
@@ -8,14 +8,14 @@ dashedName: kaprekar-numbers
 
 # --description--
 
-A positive integer is a Kaprekar number if:
+Натуральне число є числом Капрекара, якщо:
 
 <ul>
   <li>Це 1, або</li>
   <li>Десяткове представлення квадрата цього числа можна розділити на дві частини з натуральних чисел, сума яких дорівнюватиме початковому числу. </li>
 </ul>
 
-Зауважте, що розділ у результаті якого вийдуть лише нулі, є недопустимим, оскільки 0 не вважається додатним числом.
+Зверніть увагу, що розділ з нулями не може бути дійсним, оскільки 0 не є натуральним числом.
 
 Приклади чисел Капрекара:
 
@@ -26,7 +26,7 @@ A positive integer is a Kaprekar number if:
 
 # --instructions--
 
-Напишіть функцію, яка приймає число $n$, основа $bs$, і повертає true, якщо число - це число Капрекара для цієї основи. В іншому випадку видається результат false.
+Напишіть функцію, яка приймає число $n$, основу $bs$ та повертає true, якщо число є числом Капрекара за наданої основою. В іншому випадку функція повертає false.
 
 # --hints--
 
@@ -36,49 +36,49 @@ A positive integer is a Kaprekar number if:
 assert(typeof isKaprekar == 'function');
 ```
 
-`isKaprekar(1, 10)` повинен стати логічним значенням.
+`isKaprekar(1, 10)` має повернути булеве значення.
 
 ```js
 assert(typeof isKaprekar(1, 10) == 'boolean');
 ```
 
-`isKaprekar(1, 10)`повинен повертати `true`.
+`isKaprekar(1, 10)` має повернути `true`.
 
 ```js
 assert.equal(isKaprekar(1, 10), true);
 ```
 
-`isKaprekar(9, 10)` повинен повертати `true`.
+`isKaprekar(9, 10)` має повернути `true`.
 
 ```js
 assert.equal(isKaprekar(9, 10), true);
 ```
 
-`isKaprekar(2223, 10)` повинен повертати `true`.
+`isKaprekar(2223, 10)` має повернути `true`.
 
 ```js
 assert.equal(isKaprekar(2223, 10), true);
 ```
 
-`isKaprekar(22823, 10)` повинен повертати `false`.
+`isKaprekar(22823, 10)` має повернути `false`.
 
 ```js
 assert.equal(isKaprekar(22823, 10), false);
 ```
 
-`isKaprekar(9, 17)` повинен повертати `false`.
+`isKaprekar(9, 17)` має повернути `false`.
 
 ```js
 assert.equal(isKaprekar(9, 17), false);
 ```
 
-`isKaprekar(225, 17)` повинен повертати `true`.
+`isKaprekar(225, 17)` має повернути `true`.
 
 ```js
 assert.equal(isKaprekar(225, 17), true);
 ```
 
-`isKaprekar(999, 17)` повинен повертати `false`.
+`isKaprekar(999, 17)` має повернути `false`.
 
 ```js
 assert.equal(isKaprekar(999, 17), false);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-0-1.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-0-1.md
index a02d93148c0..af9c1deff78 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-0-1.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-0-1.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7ed1
-title: Задача пакування рюкзака/0-1
+title: Задача пакування рюкзака 0-1
 challengeType: 1
 forumTopicId: 323649
 dashedName: knapsack-problem0-1
@@ -8,17 +8,17 @@ dashedName: knapsack-problem0-1
 
 # --description--
 
-The 0-1 knapsack problem is defined as follows:
+Умова задачі пакування рюкзака 0-1:
 
-Дано масив об'єктів, які потрібно помістити в рюкзак. Кожен об'єкт має назву, вагу та цінність. Необхідно обрати об'єкти в такий спосіб, аби максимізувати сумарну вартість (або користь), але не перевищити максимально припустиму масу.
+Дано масив предметів, які потрібно помістити в рюкзак. Кожен об’єкт має 3 атрибути: назва, вага та цінність. Потрібно обрати предмети в такий спосіб, щоб максимізувати цінність, але не перевищити максимально допустиму вагу.
 
 # --instructions--
 
-Напишіть функцію, щоб розв'язати задачу пакування рюкзака. У параметрах функції вказується масив об’єктів і максимальна вагу. Вона має повернути найбільше можливе значення.
+Напишіть функцію, щоб розв’язати задачу пакування рюкзака. Функції надано масив предметів та максимальну вагу як параметри. Вона має повернути найбільшу можливу цінність.
 
 # --hints--
 
-`knapsack([{ name:'map', weight:9, value:150 }, { name:'compass', weight:13, value:35 }, { name:'water', weight:153, value:200 }, { name:'sandwich', weight:50, value:160 }, { name:'glucose', weight:15, value:60 }, { name:'tin', weight:68, value:45 }, { name:'banana', weight:27, value:60 }, { name:'apple', weight:39, value:40 }], 100)` має повертати `405`.
+`knapsack([{ name:'map', weight:9, value:150 }, { name:'compass', weight:13, value:35 }, { name:'water', weight:153, value:200 }, { name:'sandwich', weight:50, value:160 }, { name:'glucose', weight:15, value:60 }, { name:'tin', weight:68, value:45 }, { name:'banana', weight:27, value:60 }, { name:'apple', weight:39, value:40 }], 100)` має повернути `405`.
 
 ```js
 assert.equal(
@@ -39,7 +39,7 @@ assert.equal(
 );
 ```
 
-`knapsack([{ name:'map', weight:9, value:150 }, { name:'compass', weight:13, value:35 }, { name:'water', weight:153, value:200 }, { name:'sandwich', weight:50, value:160 }, { name:'glucose', weight:15, value:60 }, { name:'tin', weight:68, value:45 }, { name:'banana', weight:27, value:60 }, { name:'apple', weight:39, value:40 }], 200)` має повертати`510`.
+`knapsack([{ name:'map', weight:9, value:150 }, { name:'compass', weight:13, value:35 }, { name:'water', weight:153, value:200 }, { name:'sandwich', weight:50, value:160 }, { name:'glucose', weight:15, value:60 }, { name:'tin', weight:68, value:45 }, { name:'banana', weight:27, value:60 }, { name:'apple', weight:39, value:40 }], 200)` має повернути `510`.
 
 ```js
 assert.equal(
@@ -60,7 +60,7 @@ assert.equal(
 );
 ```
 
-`knapsack([{ name:'cheese', weight:23, value:30 }, { name:'beer', weight:52, value:10 }, { name:'suntan cream', weight:11, value:70 }, { name:'camera', weight:32, value:30 }, { name:'T-shirt', weight:24, value:15 }, { name:'trousers', weight:48, value:10 }, { name:'umbrella', weight:73, value:40 }], 100)` має повертати`145`.
+`knapsack([{ name:'cheese', weight:23, value:30 }, { name:'beer', weight:52, value:10 }, { name:'suntan cream', weight:11, value:70 }, { name:'camera', weight:32, value:30 }, { name:'T-shirt', weight:24, value:15 }, { name:'trousers', weight:48, value:10 }, { name:'umbrella', weight:73, value:40 }], 100)` має повернути `145`.
 
 ```js
 assert.equal(
@@ -80,7 +80,7 @@ assert.equal(
 );
 ```
 
-`knapsack([{ name:'cheese', weight:23, value:30 }, { name:'beer', weight:52, value:10 }, { name:'suntan cream', weight:11, value:70 }, { name:'camera', weight:32, value:30 }, { name:'T-shirt', weight:24, value:15 }, { name:'trousers', weight:48, value:10 }, { name:'umbrella', weight:73, value:40 }], 200)` має повертати`185`.
+`knapsack([{ name:'cheese', weight:23, value:30 }, { name:'beer', weight:52, value:10 }, { name:'suntan cream', weight:11, value:70 }, { name:'camera', weight:32, value:30 }, { name:'T-shirt', weight:24, value:15 }, { name:'trousers', weight:48, value:10 }, { name:'umbrella', weight:73, value:40 }], 200)` має повернути `185`.
 
 ```js
 assert.equal(
@@ -100,7 +100,7 @@ assert.equal(
 );
 ```
 
-`knapsack([{ name:'waterproof trousers', weight:42, value:70 }, { name:'waterproof overclothes', weight:43, value:75 }, { name:'note-case', weight:22, value:80 }, { name:'sunglasses', weight:7, value:20 }, { name:'towel', weight:18, value:12 }, { name:'socks', weight:4, value:50 }, { name:'book', weight:30, value:10 }], 100)` має повертати`237`.
+`knapsack([{ name:'waterproof trousers', weight:42, value:70 }, { name:'waterproof overclothes', weight:43, value:75 }, { name:'note-case', weight:22, value:80 }, { name:'sunglasses', weight:7, value:20 }, { name:'towel', weight:18, value:12 }, { name:'socks', weight:4, value:50 }, { name:'book', weight:30, value:10 }], 100)` має повернути `237`.
 
 ```js
 assert.equal(
@@ -120,7 +120,7 @@ assert.equal(
 );
 ```
 
-`knapsack([{ name:'waterproof trousers', weight:42, value:70 }, { name:'waterproof overclothes', weight:43, value:75 }, { name:'note-case', weight:22, value:80 }, { name:'sunglasses', weight:7, value:20 }, { name:'towel', weight:18, value:12 }, { name:'socks', weight:4, value:50 }, { name:'book', weight:30, value:10 }], 200)` має повертати`317`.'
+`knapsack([{ name:'waterproof trousers', weight:42, value:70 }, { name:'waterproof overclothes', weight:43, value:75 }, { name:'note-case', weight:22, value:80 }, { name:'sunglasses', weight:7, value:20 }, { name:'towel', weight:18, value:12 }, { name:'socks', weight:4, value:50 }, { name:'book', weight:30, value:10 }], 200)` має повернути `317`.'
 
 ```js
 assert.equal(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-bounded.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-bounded.md
index ef87c539b86..00e2da7dadd 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-bounded.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-bounded.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7ed2
-title: Обмежена задача пакування рюкзака
+title: Задача пакування рюкзака з обмеженнями
 challengeType: 1
 forumTopicId: 323652
 dashedName: knapsack-problembounded
@@ -8,17 +8,17 @@ dashedName: knapsack-problembounded
 
 # --description--
 
-The bounded knapsack problem is defined as follows:
+Умова задачі пакування рюкзака з обмеженнями:
 
-Дано масив об'єктів, які потрібно помістити в рюкзак. Кожен об'єкти має назву, частини (кількість конкретного товару), вагу та цінність. Необхідно обрати об'єкти в такий спосіб, аби максимізувати сумарну вартість (або користь), але не перевищити максимально припустиму масу. Пам'ятайте, що кожен об'єкт може відображатися у межах 0 і `pieces` разів.
+Дано масив предметів, які потрібно помістити в рюкзак. Кожен об’єкт має 4 атрибути: назва, кількість, вага та цінність. Потрібно обрати предмети в такий спосіб, щоб максимізувати цінність, але не перевищити максимально допустиму вагу. Зверніть увагу, що кількість предмета може становити від 0 до `pieces`.
 
 # --instructions--
 
-Напишіть функцію, щоб розв'язати задачу пакування рюкзака. У параметрах функції вказується масив об’єктів і максимальна вагу. Вона має повернути найбільше можливе значення.
+Напишіть функцію, щоб розв’язати задачу пакування рюкзака. Функції надано масив предметів та максимальну вагу як параметри. Вона має повернути найбільшу можливу цінність.
 
 # --hints--
 
-`findBestPack([{ name:'map', weight:9, value:150, pieces:1 }, { name:'compass', weight:13, value:35, pieces:1 }, { name:'water', weight:153, value:200, pieces:2 }, { name:'sandwich', weight:50, value:60, pieces:2 }, { name:'glucose', weight:15, value:60, pieces:2 }, { name:'tin', weight:68, value:45, pieces:3 }, { name:'banana', weight:27, value:60, pieces:3 }, { name:'apple', weight:39, value:40, pieces:3 }, { name:'cheese', weight:23, value:30, pieces:1 }, { name:'beer', weight:52, value:10, pieces:3 }, { name:'suntan, cream', weight:11, value:70, pieces:1 }, { name:'camera', weight:32, value:30, pieces:1 }, { name:'T-shirt', weight:24, value:15, pieces:2 }], 300)` має повертати`755`.
+`findBestPack([{ name:'map', weight:9, value:150, pieces:1 }, { name:'compass', weight:13, value:35, pieces:1 }, { name:'water', weight:153, value:200, pieces:2 }, { name:'sandwich', weight:50, value:60, pieces:2 }, { name:'glucose', weight:15, value:60, pieces:2 }, { name:'tin', weight:68, value:45, pieces:3 }, { name:'banana', weight:27, value:60, pieces:3 }, { name:'apple', weight:39, value:40, pieces:3 }, { name:'cheese', weight:23, value:30, pieces:1 }, { name:'beer', weight:52, value:10, pieces:3 }, { name:'suntan, cream', weight:11, value:70, pieces:1 }, { name:'camera', weight:32, value:30, pieces:1 }, { name:'T-shirt', weight:24, value:15, pieces:2 }], 300)` має повернути `755`.
 
 ```js
 assert.equal(
@@ -44,7 +44,7 @@ assert.equal(
 );
 ```
 
-`findBestPack([{ name:'map', weight:9, value:150, pieces:1 }, { name:'compass', weight:13, value:35, pieces:1 }, { name:'water', weight:153, value:200, pieces:2 }, { name:'sandwich', weight:50, value:60, pieces:2 }, { name:'glucose', weight:15, value:60, pieces:2 }, { name:'tin', weight:68, value:45, pieces:3 }, { name:'banana', weight:27, value:60, pieces:3 }, { name:'apple', weight:39, value:40, pieces:3 }, { name:'cheese', weight:23, value:30, pieces:1 }, { name:'beer', weight:52, value:10, pieces:3 }, { name:'suntan, cream', weight:11, value:70, pieces:1 }, { name:'camera', weight:32, value:30, pieces:1 }, { name:'T-shirt', weight:24, value:15, pieces:2 }], 400)` має повертати`875`.
+`findBestPack([{ name:'map', weight:9, value:150, pieces:1 }, { name:'compass', weight:13, value:35, pieces:1 }, { name:'water', weight:153, value:200, pieces:2 }, { name:'sandwich', weight:50, value:60, pieces:2 }, { name:'glucose', weight:15, value:60, pieces:2 }, { name:'tin', weight:68, value:45, pieces:3 }, { name:'banana', weight:27, value:60, pieces:3 }, { name:'apple', weight:39, value:40, pieces:3 }, { name:'cheese', weight:23, value:30, pieces:1 }, { name:'beer', weight:52, value:10, pieces:3 }, { name:'suntan, cream', weight:11, value:70, pieces:1 }, { name:'camera', weight:32, value:30, pieces:1 }, { name:'T-shirt', weight:24, value:15, pieces:2 }], 400)` має повернути `875`.
 
 ```js
 assert.equal(
@@ -70,7 +70,7 @@ assert.equal(
 );
 ```
 
-`findBestPack([{ name:'map', weight:9, value:150, pieces:1 }, { name:'compass', weight:13, value:35, pieces:1 }, { name:'water', weight:153, value:200, pieces:2 }, { name:'sandwich', weight:50, value:60, pieces:2 }, { name:'glucose', weight:15, value:60, pieces:2 }, { name:'tin', weight:68, value:45, pieces:3 }, { name:'banana', weight:27, value:60, pieces:3 }, { name:'apple', weight:39, value:40, pieces:3 }, { name:'cheese', weight:23, value:30, pieces:1 }, { name:'beer', weight:52, value:10, pieces:3 }, { name:'suntan, cream', weight:11, value:70, pieces:1 }, { name:'camera', weight:32, value:30, pieces:1 }, { name:'T-shirt', weight:24, value:15, pieces:2 }], 500)` має повертати`1015`.
+`findBestPack([{ name:'map', weight:9, value:150, pieces:1 }, { name:'compass', weight:13, value:35, pieces:1 }, { name:'water', weight:153, value:200, pieces:2 }, { name:'sandwich', weight:50, value:60, pieces:2 }, { name:'glucose', weight:15, value:60, pieces:2 }, { name:'tin', weight:68, value:45, pieces:3 }, { name:'banana', weight:27, value:60, pieces:3 }, { name:'apple', weight:39, value:40, pieces:3 }, { name:'cheese', weight:23, value:30, pieces:1 }, { name:'beer', weight:52, value:10, pieces:3 }, { name:'suntan, cream', weight:11, value:70, pieces:1 }, { name:'camera', weight:32, value:30, pieces:1 }, { name:'T-shirt', weight:24, value:15, pieces:2 }], 500)` має повернути `1015`.
 
 ```js
 assert.equal(
@@ -96,7 +96,7 @@ assert.equal(
 );
 ```
 
-`findBestPack([{ name:'map', weight:9, value:150, pieces:1 }, { name:'compass', weight:13, value:35, pieces:1 }, { name:'water', weight:153, value:200, pieces:2 }, { name:'sandwich', weight:50, value:60, pieces:2 }, { name:'glucose', weight:15, value:60, pieces:2 }, { name:'tin', weight:68, value:45, pieces:3 }, { name:'banana', weight:27, value:60, pieces:3 }, { name:'apple', weight:39, value:40, pieces:3 }, { name:'cheese', weight:23, value:30, pieces:1 }, { name:'beer', weight:52, value:10, pieces:3 }, { name:'suntan, cream', weight:11, value:70, pieces:1 }, { name:'camera', weight:32, value:30, pieces:1 }, { name:'T-shirt', weight:24, value:15, pieces:2 }], 600)` should return `1120`.
+`findBestPack([{ name:'map', weight:9, value:150, pieces:1 }, { name:'compass', weight:13, value:35, pieces:1 }, { name:'water', weight:153, value:200, pieces:2 }, { name:'sandwich', weight:50, value:60, pieces:2 }, { name:'glucose', weight:15, value:60, pieces:2 }, { name:'tin', weight:68, value:45, pieces:3 }, { name:'banana', weight:27, value:60, pieces:3 }, { name:'apple', weight:39, value:40, pieces:3 }, { name:'cheese', weight:23, value:30, pieces:1 }, { name:'beer', weight:52, value:10, pieces:3 }, { name:'suntan, cream', weight:11, value:70, pieces:1 }, { name:'camera', weight:32, value:30, pieces:1 }, { name:'T-shirt', weight:24, value:15, pieces:2 }], 600)` має повернути `1120`.
 
 ```js
 assert.equal(
@@ -122,7 +122,7 @@ assert.equal(
 );
 ```
 
-`findBestPack([{ name:'map', weight:9, value:150, pieces:1 }, { name:'compass', weight:13, value:35, pieces:1 }, { name:'water', weight:153, value:200, pieces:2 }, { name:'sandwich', weight:50, value:60, pieces:2 }, { name:'glucose', weight:15, value:60, pieces:2 }, { name:'tin', weight:68, value:45, pieces:3 }, { name:'banana', weight:27, value:60, pieces:3 }, { name:'apple', weight:39, value:40, pieces:3 }, { name:'cheese', weight:23, value:30, pieces:1 }, { name:'beer', weight:52, value:10, pieces:3 }, { name:'suntan, cream', weight:11, value:70, pieces:1 }, { name:'camera', weight:32, value:30, pieces:1 }, { name:'T-shirt', weight:24, value:15, pieces:2 }], 700)` має повертати`1225`.
+`findBestPack([{ name:'map', weight:9, value:150, pieces:1 }, { name:'compass', weight:13, value:35, pieces:1 }, { name:'water', weight:153, value:200, pieces:2 }, { name:'sandwich', weight:50, value:60, pieces:2 }, { name:'glucose', weight:15, value:60, pieces:2 }, { name:'tin', weight:68, value:45, pieces:3 }, { name:'banana', weight:27, value:60, pieces:3 }, { name:'apple', weight:39, value:40, pieces:3 }, { name:'cheese', weight:23, value:30, pieces:1 }, { name:'beer', weight:52, value:10, pieces:3 }, { name:'suntan, cream', weight:11, value:70, pieces:1 }, { name:'camera', weight:32, value:30, pieces:1 }, { name:'T-shirt', weight:24, value:15, pieces:2 }], 700)` має повернути `1225`.
 
 ```js
 assert.equal(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-continuous.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-continuous.md
index bb6c579ab2a..1b2ee0480ec 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-continuous.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-continuous.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7ed3
-title: Задача пакування рюкзака/Безперервна
+title: Задача пакування рюкзака тривалої дії
 challengeType: 1
 forumTopicId: 323654
 dashedName: knapsack-problemcontinuous
@@ -8,17 +8,17 @@ dashedName: knapsack-problemcontinuous
 
 # --description--
 
-A thief burgles a butcher's shop, where he can select from some items.
+Злодій грабує м’ясну лавку і може вибрати декілька продуктів.
 
-Злодій знає вагу і ціну кожного предмета. Оскільки його рюкзак має обмеження максимальної ваги, він хоче вибрати предмети так, щоб отримати максимальний прибуток. Він може розрізати предмети; після різання ціна товару знизиться пропорційно початковій ціні за співвідношенням мас. Тобто половина товару коштуватиме вдвічі дешевше від початкової вартості.
+Злодій знає вагу і ціну всіх продуктів. Оскільки його рюкзак може витримати лише певну вагу, він хоче вибрати продукти так, щоб отримати максимальний прибуток. Він може розрізати продукти; після цього ціна товару знизиться пропорційно початковій ціні за співвідношенням ваги. Тобто половина продукту коштуватиме вдвічі менше від початкової ціни.
 
 # --instructions--
 
-Напишіть функцію, яка приймає масив об'єктів, що становлять товари, доступні в магазині. Кожен об'єкт має назву, вагу та вартість. У параметрах функції також вказується максимальна вага. Функція повинна повернути максимально можливе значення, а загальна вага вибраних елементів не повинна перевищувати максимальну вагу.
+Напишіть функцію, яка приймає масив продуктів, доступних в магазині. Кожен об’єкт має 3 атрибути: назва, вага та цінність. Функція також приймає максимальну вагу як параметр. Функція має повернути найбільшу можливу цінність, а загальна вага вибраних продуктів не може перевищувати максимально допустиму вагу.
 
 # --hints--
 
-`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 10)` має повертати`257.875`.
+`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 10)` має повернути `257.875`.
 
 ```js
 assert.equal(
@@ -40,7 +40,7 @@ assert.equal(
 );
 ```
 
-`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 12)` має повертати`295.05405405405406`.
+`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 12)` має повернути `295.05405405405406`.
 
 ```js
 assert.equal(
@@ -62,7 +62,7 @@ assert.equal(
 );
 ```
 
-`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 15)` має повертати`349.3783783783784`.
+`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 15)` має повернути `349.3783783783784`.
 
 ```js
 assert.equal(
@@ -84,7 +84,7 @@ assert.equal(
 );
 ```
 
-`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 22)` має повертати`459.5263157894737`.
+`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 22)` має повернути `459.5263157894737`.
 
 ```js
 assert.equal(
@@ -106,7 +106,7 @@ assert.equal(
 );
 ```
 
-`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 24)` має повертати`478.4736842105263`.
+`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 24)` має повернути `478.4736842105263`.
 
 ```js
 assert.equal(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-unbounded.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-unbounded.md
index aa791f20f2d..5e6ef5c6f72 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-unbounded.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knapsack-problem-unbounded.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7ed4
-title: Задача пакування рюкзака/Необмежена
+title: Задача пакування рюкзака без обмежень
 challengeType: 1
 forumTopicId: 323655
 dashedName: knapsack-problemunbounded
@@ -8,21 +8,21 @@ dashedName: knapsack-problemunbounded
 
 # --description--
 
-A traveler gets diverted and has to make an unscheduled stop in what turns out to be Shangri-La. Opting to leave, he is allowed to take as much as he likes of the items available there, so long as it will fit in his knapsack, and he can carry it.
+Турист змінює курс і змушений зробити незаплановану зупинку в Шангрі-Ла. Перед від'їздом йому дозволили взяти стільки предметів, скільки захоче, за умови, що вибрані предмети помістяться в рюкзак, і він зможе його нести.
 
-Він знає максимальну вагу, яку зможе нести; і, що об'єм рюкзака обмежений.
+Він знає максимальну вагу, яку зможе нести, і що об’єм рюкзака обмежений.
 
-Над штрих-кодами предметів написана їх вага та об'єм. Він витягує свою останню копію фінансового звіту та дізнається ціну кожного предмету.
+Над штрих-кодами предметів написана їхні вага та об’єм. Він витягує останню копію фінансового звіту та дізнається цінність кожного предмету.
 
-Йому можна брати лише цілі предмети, і їх є набагато більше, ніж він би зміг нести.
+Йому можна брати лише цілі предмети, а їх є набагато більше, ніж він би зміг нести.
 
 # --instructions--
 
-Напишіть функцію, а у її параметрах вкажіть масив об'єктів, максимальну вагу та максимальний об'єм. Кожен об'єкт має назву, вартість, вагу та об'єм. Функція має повернути максимальне значення предметів, які мандрівник може взяти з собою.
+Напишіть функцію, яка приймає масив предметів, максимальну вагу та максимальний об’єм як параметри. Кожен об’єкт має 4 атрибути: назва, цінність, вага та об’єм. Функція має повернути максимальну цінність предметів, які турист може взяти з собою.
 
 # --hints--
 
-`knapsackUnbounded([{ name:"panacea", value:3000, weight:0.3, volume:0.025 }, { name:"ichor", value:1800, weight:0.2, volume:0.015 }, { name:"gold", value:2500, weight:2, volume:0.002 }], 25, 0.25)` має повертати `54500`.
+`knapsackUnbounded([{ name:"panacea", value:3000, weight:0.3, volume:0.025 }, { name:"ichor", value:1800, weight:0.2, volume:0.015 }, { name:"gold", value:2500, weight:2, volume:0.002 }], 25, 0.25)` має повернути `54500`.
 
 ```js
 assert.equal(
@@ -39,7 +39,7 @@ assert.equal(
 );
 ```
 
-`knapsackUnbounded([{ name:"panacea", value:3000, weight:0.3, volume:0.025 }, { name:"ichor", value:1800, weight:0.2, volume:0.015 }, { name:"gold", value:2500, weight:2, volume:0.002 }], 55, 0.25)` має повертати `88400`.
+`knapsackUnbounded([{ name:"panacea", value:3000, weight:0.3, volume:0.025 }, { name:"ichor", value:1800, weight:0.2, volume:0.015 }, { name:"gold", value:2500, weight:2, volume:0.002 }], 55, 0.25)` має повернути `88400`.
 
 ```js
 assert.equal(
@@ -56,7 +56,7 @@ assert.equal(
 );
 ```
 
-`knapsackUnbounded([{ name:"panacea", value:3000, weight:0.3, volume:0.025 }, { name:"ichor", value:1800, weight:0.2, volume:0.015 }, { name:"gold", value:2500, weight:2, volume:0.002 }], 25, 0.15)` має повертати `42500`.
+`knapsackUnbounded([{ name:"panacea", value:3000, weight:0.3, volume:0.025 }, { name:"ichor", value:1800, weight:0.2, volume:0.015 }, { name:"gold", value:2500, weight:2, volume:0.002 }], 25, 0.15)` має повернути `42500`.
 
 ```js
 assert.equal(
@@ -73,7 +73,7 @@ assert.equal(
 );
 ```
 
-`knapsackUnbounded([{ name:"panacea", value:3000, weight:0.3, volume:0.025 }, { name:"ichor", value:1800, weight:0.2, volume:0.015 }, { name:"gold", value:2500, weight:2, volume:0.002 }], 35, 0.35)` має повертати `75900`.
+`knapsackUnbounded([{ name:"panacea", value:3000, weight:0.3, volume:0.025 }, { name:"ichor", value:1800, weight:0.2, volume:0.015 }, { name:"gold", value:2500, weight:2, volume:0.002 }], 35, 0.35)` має повернути `75900`.
 
 ```js
 assert.equal(
@@ -90,7 +90,7 @@ assert.equal(
 );
 ```
 
-`knapsackUnbounded([{ name:"panacea", value:3000, weight:0.3, volume:0.025 }, { name:"ichor", value:1800, weight:0.2, volume:0.015 }, { name:"gold", value:2500, weight:2, volume:0.002 }], 15, 0.25)` має повертати`43200`.
+`knapsackUnbounded([{ name:"panacea", value:3000, weight:0.3, volume:0.025 }, { name:"ichor", value:1800, weight:0.2, volume:0.015 }, { name:"gold", value:2500, weight:2, volume:0.002 }], 15, 0.25)` має повернути `43200`.
 
 ```js
 assert.equal(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knights-tour.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knights-tour.md
index 9952031be7e..6475cd182b2 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knights-tour.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/knights-tour.md
@@ -8,11 +8,11 @@ dashedName: knights-tour
 
 # --description--
 
-Knight's Tour Problem: You have an empty `width` \* `height` chessboard, but for a single knight on some square. The knight must perform a sequence of legal moves that result in the knight visiting every square on the chessboard exactly once. Note that it is *not* a requirement that the tour be "closed"; that is, the knight need not end within a single move of its start position.
+У вас є порожня шахівниця (розміром `ширина` \* `висота`) з одним конем на одній з клітинок. Кінь повинен виконати послідовність ходів таким чином, щоб побувати на кожній клітинці шахівниці лише один раз. Зауважте, що маршрут *необов’язково* повинен бути замкнутим; тобто кінь може закінчити гру, опинившись не на початковій позиції.
 
 # --instructions--
 
-Напишіть функцію, яка бере `width` і `height` як параметри й повертає кількість початкових позицій звідти, де можливо виконати завдання, про яке йшлося вище.
+Напишіть функцію, яка приймає ширину (`width`) та висоту (`height`) як параметри і повертає кількість початкових позицій, за яких можливо виконати завдання вище.
 
 # --hints--
 
@@ -22,37 +22,37 @@ Knight's Tour Problem: You have an empty `width` \* `height` chessboard, but for
 assert(typeof knightTour == 'function');
 ```
 
-`knightTour(6, 6)` повинен повернути число.
+`knightTour(6, 6)` має повернути число.
 
 ```js
 assert(typeof knightTour(6, 6) == 'number');
 ```
 
-`knightTour(6, 6)` повинен повернути `36`.
+`knightTour(6, 6)` має повернути `36`.
 
 ```js
 assert.equal(knightTour(6, 6), 36);
 ```
 
-`knightTour(5, 6)`повинен повернути `30`.
+`knightTour(5, 6)` має повернути `30`.
 
 ```js
 assert.equal(knightTour(5, 6), 30);
 ```
 
-`knightTour(4, 6)` повинен повернути. `12`.
+`knightTour(4, 6)` має повернути `12`.
 
 ```js
 assert.equal(knightTour(4, 6), 12);
 ```
 
-`knightTour(7, 3)` повинен повернути `10`.
+`knightTour(7, 3)` має повернути `10`.
 
 ```js
 assert.equal(knightTour(7, 3), 10);
 ```
 
-`knightTour(8, 6)` повинен повернути `48`.
+`knightTour(8, 6)` має повернути `48`.
 
 ```js
 assert.equal(knightTour(8, 6), 48);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/largest-int-from-concatenated-ints.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/largest-int-from-concatenated-ints.md
index 7803e6242d5..a99cb455190 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/largest-int-from-concatenated-ints.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/largest-int-from-concatenated-ints.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7edb
-title: Найбільше ціле число з об'єднаних цілих чисел
+title: Найбільше ціле число з об’єднаних цілих чисел
 challengeType: 1
 forumTopicId: 302298
 dashedName: largest-int-from-concatenated-ints
@@ -8,7 +8,7 @@ dashedName: largest-int-from-concatenated-ints
 
 # --description--
 
-Given a set of positive integers, write a function to order the integers in such a way that the concatenation of the numbers forms the largest possible integer and return this integer.
+Дано множину натуральних чисел. Напишіть функцію, яка впорядкує цілі числа, щоб утворилось найбільше можливе ціле число, і поверне це число.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/last-friday-of-each-month.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/last-friday-of-each-month.md
index 2a6ffd557b0..e56e0e09b39 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/last-friday-of-each-month.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/last-friday-of-each-month.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7edc
-title: Остання п'ятниця кожного місяця
+title: Остання п’ятниця кожного місяця
 challengeType: 1
 forumTopicId: 302299
 dashedName: last-friday-of-each-month
@@ -8,7 +8,7 @@ dashedName: last-friday-of-each-month
 
 # --description--
 
-Write a function that returns the date of the last Friday of a given month for a given year.
+Напишіть функцію, яка повертає дату останньої п’ятниці заданого місяця за певний рік.
 
 # --hints--
 
@@ -18,55 +18,55 @@ Write a function that returns the date of the last Friday of a given month for a
 assert(typeof lastFriday == 'function');
 ```
 
-`lastFriday(2018, 1)` повинен видавати число.
+`lastFriday(2018, 1)` має повернути число.
 
 ```js
 assert(typeof lastFriday(2018, 1) == 'number');
 ```
 
-`lastFriday(2018, 1)` повинен видавати `26`.
+`lastFriday(2018, 1)` має повернути `26`.
 
 ```js
 assert.equal(lastFriday(2018, 1), 26);
 ```
 
-`lastFriday(2017, 2)` повинен видавати `24`.
+`lastFriday(2017, 2)` має повернути `24`.
 
 ```js
 assert.equal(lastFriday(2017, 2), 24);
 ```
 
-`lastFriday(2012, 3)` повинен видавати `30`.
+`lastFriday(2012, 3)` має повернути `30`.
 
 ```js
 assert.equal(lastFriday(2012, 3), 30);
 ```
 
-`lastFriday(1900, 4)` повинен видавати `27`.
+`lastFriday(1900, 4)` має повернути `27`.
 
 ```js
 assert.equal(lastFriday(1900, 4), 27);
 ```
 
-`lastFriday(2000, 5)` повинен видавати `26`.
+`lastFriday(2000, 5)` має повернути `26`.
 
 ```js
 assert.equal(lastFriday(2000, 5), 26);
 ```
 
-`lastFriday(2006, 6)` повинен видавати `30`.
+`lastFriday(2006, 6)` має повернути `30`.
 
 ```js
 assert.equal(lastFriday(2006, 6), 30);
 ```
 
-`lastFriday(2010, 7)` повинен видавати `30`.
+`lastFriday(2010, 7)` має повернути `30`.
 
 ```js
 assert.equal(lastFriday(2010, 7), 30);
 ```
 
-`lastFriday(2005, 8)` повинен видавати `26`.
+`lastFriday(2005, 8)` має повернути `26`.
 
 ```js
 assert.equal(lastFriday(2005, 8), 26);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/last-letter-first-letter.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/last-letter-first-letter.md
index f1af523edaf..ef90f3121a7 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/last-letter-first-letter.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/last-letter-first-letter.md
@@ -1,6 +1,6 @@
 ---
 id: 5e4ce2b6ac708cc68c1df25e
-title: Остання літера-перша літера
+title: Гра в слова
 challengeType: 1
 forumTopicId: 385256
 dashedName: last-letter-first-letter
@@ -8,20 +8,20 @@ dashedName: last-letter-first-letter
 
 # --description--
 
-A certain children's game involves starting with a word in a particular category. Each participant in turn says a word, but that word must begin with the final letter of the previous word. Once a word has been given, it cannot be repeated. If an opponent cannot give a word in the category, they fall out of the game.
+Гра в слова розпочинається зі слова в певній категорії. Кожен учасник по черзі каже слово, що починається на останню літеру попереднього слова. Якщо слово вже назвали, повторювати його не можна. Якщо суперник не може назвати слово з певної категорії, він вибуває з гри.
 
-Нижче наведений приклад категорії "тварини",
+Наприклад, якщо категорією є тварини:
 
-<pre>Child 1: dog
-Child 2: goldfish
-Child 1: hippopotamus
-Child 2: snake
+<pre>Гравець 1: тигр
+Гравець 2: рак
+Гравець 1: кріт
+Гравець 2: тушканчик
 ...
 </pre>
 
 # --instructions--
 
-Напишіть функцію, яка охоплює вхідний масив слів. Функція повинна видавати масив слів, в яких перша літера кожного слова така ж сама, як остання літера попереднього слова. Використовуйте лише слова з вхідного масиву, і якщо слово було використане, то повторювати його не можна. Слова в масиві видачі слід вибирати та впорядковувати таким чином, щоб вони були якомога довшими.
+Напишіть функцію, яка приймає вхідний масив слів. Функція має повернути масив слів, де перша літера кожного слова така ж сама, як остання літера попереднього слова. Використовуйте лише слова з вхідного масиву та не повторюйте слова. Слова у вихідному масиві потрібно вибрати та впорядкувати таким чином, щоб він був якомога довшим.
 
 # --hints--
 
@@ -31,7 +31,7 @@ Child 2: snake
 assert(typeof findLongestChain == 'function');
 ```
 
-`findLongestChain(["certain", "each", "game", "involves", "starting", "with", "word"])` повинен видавати масив.
+`findLongestChain(["certain", "each", "game", "involves", "starting", "with", "word"])` має повернути масив.
 
 ```js
 assert(
@@ -49,7 +49,7 @@ assert(
 );
 ```
 
-`findLongestChain(["certain", "each", "game", "involves", "starting", "with", "word"])` повинен видавати `["involves", "starting", "game", "each"]`.
+`findLongestChain(["certain", "each", "game", "involves", "starting", "with", "word"])` має повернути `["involves", "starting", "game", "each"]`.
 
 ```js
 assert.deepEqual(
@@ -66,7 +66,7 @@ assert.deepEqual(
 );
 ```
 
-`findLongestChain(["audino", "bagon", "kangaskhan", "banette", "bidoof", "braviary", "exeggcute", "yamask"])` повинен видавати `["braviary", "yamask", "kangaskhan"]`
+`findLongestChain(["audino", "bagon", "kangaskhan", "banette", "bidoof", "braviary", "exeggcute", "yamask"])` має повернути `["braviary", "yamask", "kangaskhan"]`.
 
 ```js
 assert.deepEqual(
@@ -84,7 +84,7 @@ assert.deepEqual(
 );
 ```
 
-`findLongestChain(["harp", "poliwrath", "poochyena", "porygon2", "porygonz", "archana"])` повинен видавати `["poliwrath", "harp", "poochyena", "archana"]`.
+`findLongestChain(["harp", "poliwrath", "poochyena", "porygon2", "porygonz", "archana"])` має повернути `["poliwrath", "harp", "poochyena", "archana"]`.
 
 ```js
 assert.deepEqual(
@@ -100,7 +100,7 @@ assert.deepEqual(
 );
 ```
 
-`findLongestChain(["scolipede", "elephant", "zeaking", "sealeo", "silcoon", "tigers"])` повинен видавати `["scolipede", "elephant", "tigers", "sealeo"]`.
+`findLongestChain(["scolipede", "elephant", "zeaking", "sealeo", "silcoon", "tigers"])` має повернути `["scolipede", "elephant", "tigers", "sealeo"]`.
 
 ```js
 assert.deepEqual(
@@ -116,7 +116,7 @@ assert.deepEqual(
 );
 ```
 
-`findLongestChain(["loudred", "lumineon", "lunatone", "machamp", "magnezone", "nosepass", "petilil", "pidgeotto", "pikachu"])` повинен видавати `["machamp", "petilil", "lumineon", "nosepass"]`.
+`findLongestChain(["loudred", "lumineon", "lunatone", "machamp", "magnezone", "nosepass", "petilil", "pidgeotto", "pikachu"])` має повернути `["machamp", "petilil", "lumineon", "nosepass"]`.
 
 ```js
 assert.deepEqual(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/leap-year.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/leap-year.md
index bf14997bb1d..124a7ee09e7 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/leap-year.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/leap-year.md
@@ -8,7 +8,7 @@ dashedName: leap-year
 
 # --description--
 
-Determine whether a given year is a leap year in the Gregorian calendar.
+Визначте, чи даний рік є високосним роком в григоріанському календарі.
 
 # --hints--
 
@@ -18,43 +18,43 @@ Determine whether a given year is a leap year in the Gregorian calendar.
 assert(typeof isLeapYear == 'function');
 ```
 
-`isLeapYear()` повинен повертати логічний тип.
+`isLeapYear()` має повернути булеве значення.
 
 ```js
 assert(typeof isLeapYear(2018) == 'boolean');
 ```
 
-`isLeapYear(2018)` повинен повернути `false`.
+`isLeapYear(2018)` має повернути `false`.
 
 ```js
 assert.equal(isLeapYear(2018), false);
 ```
 
-`isLeapYear(2016)` повинен повернути `true`.
+`isLeapYear(2016)` має повернути `true`.
 
 ```js
 assert.equal(isLeapYear(2016), true);
 ```
 
-`isLeapYear(2000)` повинен повернути `true`.
+`isLeapYear(2000)` має повернути `true`.
 
 ```js
 assert.equal(isLeapYear(2000), true);
 ```
 
-`isLeapYear(1900)` повинен повернути `false`.
+`isLeapYear(1900)` має повернути `false`.
 
 ```js
 assert.equal(isLeapYear(1900), false);
 ```
 
-`isLeapYear(1996)` повинен повернути `true`.
+`isLeapYear(1996)` має повернути `true`.
 
 ```js
 assert.equal(isLeapYear(1996), true);
 ```
 
-`isLeapYear(1800)` повинен повернути `false`.
+`isLeapYear(1800)` має повернути `false`.
 
 ```js
 assert.equal(isLeapYear(1800), false);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/least-common-multiple.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/least-common-multiple.md
index d2096d890af..345bbe1d745 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/least-common-multiple.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/least-common-multiple.md
@@ -8,13 +8,13 @@ dashedName: least-common-multiple
 
 # --description--
 
-The least common multiple of 12 and 18 is 36, because 12 is a factor (12 × 3 = 36), and 18 is a factor (18 × 2 = 36), and there is no positive integer less than 36 that has both factors. As a special case, if either $m$ or $n$ is zero, then the least common multiple is zero. One way to calculate the least common multiple is to iterate all the multiples of $m$, until you find one that is also a multiple of $n$. If you already have $gcd$ for <a href="https://rosettacode.org/wiki/Greatest_common_divisor" target="_blank" rel="noopener noreferrer nofollow">greatest common divisor</a>, then this formula calculates $lcm$.
+Найменшим спільним кратним чисел 12 та 18 є 36, оскільки 12 є множником (12 × 3 = 36) та 18 є множником (18 × 2 = 36), і не існує натурального числа, меншого за 36, яке ділиться на обидва числа. В окремому випадку, якщо $m$ або $n$ дорівнює нулю, то найменше спільне кратне дорівнює нулю. Один зі способів обчислити найменше спільне кратне — ітерувати всі кратні числа $m$, доки не буде знайдено таке, що є кратним числа $n$. Якщо ви вже маєте $нсд$ для <a href="https://rosettacode.org/wiki/Greatest_common_divisor" target="_blank" rel="noopener noreferrer nofollow">найбільшого спільного дільника</a>, ось формула для обчислення $нск$.
 
-$ \\operatorname{нск}(m, n) = \\frac{|m \\times n|}{\\operatorname{нсд}(m, n)} $$
+$$ \\operatorname{нск}(m, n) = \\frac{|m \\times n|}{\\operatorname{нсд}(m, n)} $$
 
 # --instructions--
 
-Обчисліть найменше спільне кратне масиву цілих чисел. З огляду на значення *m* та *n*, найменше спільне кратне — це найменше позитивне ціле число, яке має як *m*, так і *n* у якості множників.
+Обчисліть найменше спільне кратне масиву цілих чисел. Дано *m* та *n*; найменшим спільним кратним є найменше натуральне число, яке ділиться на *m* та *n*.
 
 # --hints--
 
@@ -24,37 +24,37 @@ $ \\operatorname{нск}(m, n) = \\frac{|m \\times n|}{\\operatorname{нсд}(m,
 assert(typeof LCM == 'function');
 ```
 
-`LCM([2, 4, 8])` має повертати число.
+`LCM([2, 4, 8])` має повернути число.
 
 ```js
 assert(typeof LCM([2, 4, 8]) == 'number');
 ```
 
-`LCM([2, 4, 8])` має повертати `8`.
+`LCM([2, 4, 8])` має повернути `8`.
 
 ```js
 assert.equal(LCM([2, 4, 8]), 8);
 ```
 
-`LCM([4, 8, 12])` має повертати `24`.
+`LCM([4, 8, 12])` має повернути `24`.
 
 ```js
 assert.equal(LCM([4, 8, 12]), 24);
 ```
 
-`LCM([3, 4, 5, 12, 40])` має повертати `120`.
+`LCM([3, 4, 5, 12, 40])` має повернути `120`.
 
 ```js
 assert.equal(LCM([3, 4, 5, 12, 40]), 120);
 ```
 
-`LCM([11, 33, 90])` має повертати `990`.
+`LCM([11, 33, 90])` має повернути `990`.
 
 ```js
 assert.equal(LCM([11, 33, 90]), 990);
 ```
 
-`LCM([-50, 25, -45, -18, 90, 447])` має повертати `67050`.
+`LCM([-50, 25, -45, -18, 90, 447])` має повернути `67050`.
 
 ```js
 assert.equal(LCM([-50, 25, -45, -18, 90, 447]), 67050);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/left-factorials.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/left-factorials.md
index 7867fd7335f..16381762f35 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/left-factorials.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/left-factorials.md
@@ -8,7 +8,7 @@ dashedName: left-factorials
 
 # --description--
 
-**Left factorials**, $ !n $, may refer to either *subfactorials* or to *factorial sums*. The same notation can be confusingly seen used for the two different definitions. Sometimes, *subfactorials* (also known as *derangements*) may use any of the notations:
+**Ліві факторіали** $ !n $ можуть посилатися як на *субфакторіали*, так і *факторні суми*. Однаковий запис різних визначень може призвести до плутанини. Іноді *субфакторіали* (також відомі як *перестановки*) можуть використовувати будь-який з записів:
 
 <ul>
   <li>$!n`$</li>
@@ -16,7 +16,7 @@ dashedName: left-factorials
   <li>$n¡$</li>
 </ul>
 
-(Можливо, візуально це не очевидно, але в останньому прикладі використовується перевернутий знак оклику) У цьому завданні буде використовуватися дана формула для **лівого факторіала**:
+(Можливо, візуально це неочевидно, але в останньому прикладі використовується перевернутий знак оклику). У цьому завданні буде використовуватися дана формула для **лівого факторіала**:
 
 $ !n = \\sum\_{k=0}^{n-1} k! $
 
@@ -24,7 +24,7 @@ $ !n = \\sum\_{k=0}^{n-1} k! $
 
 # --instructions--
 
-Напишіть функцію для обчислення лівого факторіала заданого числа.
+Напишіть функцію, щоб знайти лівий факторіал заданого числа.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/letter-frequency.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/letter-frequency.md
index 815410d7a5b..f227444be22 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/letter-frequency.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/letter-frequency.md
@@ -1,6 +1,6 @@
 ---
 id: 5e4ce2bbac708cc68c1df25f
-title: Частототність
+title: Частота слів
 challengeType: 1
 forumTopicId: 385263
 dashedName: letter-frequency
@@ -8,17 +8,17 @@ dashedName: letter-frequency
 
 # --description--
 
-Given a string, calculate the frequency of each character.
+Обчисліть частоту кожного символу в даному рядку.
 
-Потрібно порахувати всі символи. Включаючи малі та великі літери, цифри, пробіли, спеціальні символи або будь-який інший роздільний символ.
+Потрібно порахувати всі символи. Включно з малими та великими літерами, цифрами, пробілами, спеціальними символами або будь-якими іншими роздільними символами.
 
 # --instructions--
 
 Напишіть функцію для підрахунку всіх символів, які входять у даний рядок.
 
-Функція повинна повертати 2D масив, де кожен із елементів має бути записаний у такій формі: `['char', freq]`. Символ має бути рядком із довжиною 1, а freq - числом, що позначає кількість цих символів.
+Функція має повернути 2D-масив, де кожен елемент має такий вигляд: `['символ', кількість]`. Символ має бути рядком з довжиною 1, а кількість — числом, яке позначає кількість цих символів.
 
-Наприклад, дано рядок "ab", то ваша функція повинна повертати `[['a', 1], ['b', 1]]`.
+Наприклад, дано рядок "ab". Функція має повернути `[['a', 1], ['b', 1]]`.
 
 # --hints--
 
@@ -28,13 +28,13 @@ Given a string, calculate the frequency of each character.
 assert(typeof letterFrequency == 'function');
 ```
 
-`letterFrequency("Not all that Mrs. Bennet, however")` має повертати масив.
+`letterFrequency("Not all that Mrs. Bennet, however")` має повернути масив.
 
 ```js
 assert(Array.isArray(letterFrequency('Not all that Mrs. Bennet, however')));
 ```
 
-`letterFrequency("Not all that Mrs. Bennet, however")` повинен повернути `[[" ", 5], [",", 1], [".", 1], ["B", 1], ["M", 1], ["N", 1], ["a", 2], ["e", 4], ["h", 2], ["l", 2], ["n", 2], ["o", 2], ["r", 2], ["s", 1], ["t", 4], ["v", 1], ["w", 1]]`.
+`letterFrequency("Not all that Mrs. Bennet, however")` має повернути `[[" ", 5], [",", 1], [".", 1], ["B", 1], ["M", 1], ["N", 1], ["a", 2], ["e", 4], ["h", 2], ["l", 2], ["n", 2], ["o", 2], ["r", 2], ["s", 1], ["t", 4], ["v", 1], ["w", 1]]`.
 
 ```js
 assert.deepEqual(letterFrequency('Not all that Mrs. Bennet, however'), [
@@ -58,7 +58,7 @@ assert.deepEqual(letterFrequency('Not all that Mrs. Bennet, however'), [
 ]);
 ```
 
-`letterFrequency("daughters, could ask on the ")` повинен повернути `[[" ", 5],[",", 1],["a", 2],["c", 1],["d", 2],["e", 2],["g", 1],["h", 2],["k", 1],["l", 1],["n", 1],["o", 2],["r", 1],["s", 2],["t", 2],["u", 2]]`.
+`letterFrequency("daughters, could ask on the ")` має повернути `[[" ", 5],[",", 1],["a", 2],["c", 1],["d", 2],["e", 2],["g", 1],["h", 2],["k", 1],["l", 1],["n", 1],["o", 2],["r", 1],["s", 2],["t", 2],["u", 2]]`.
 
 ```js
 assert.deepEqual(letterFrequency('daughters, could ask on the '), [
@@ -81,7 +81,7 @@ assert.deepEqual(letterFrequency('daughters, could ask on the '), [
 ]);
 ```
 
-`letterFrequency("husband any satisfactory description")` повинен повернути `[[" ", 3], ["a", 4], ["b", 1], ["c", 2], ["d", 2], ["e", 1], ["f", 1], ["h", 1], ["i", 3], ["n", 3], ["o", 2], ["p", 1], ["r", 2], ["s", 4], ["t", 3], ["u", 1], ["y", 2]]`.
+`letterFrequency("husband any satisfactory description")` має повернути `[[" ", 3], ["a", 4], ["b", 1], ["c", 2], ["d", 2], ["e", 1], ["f", 1], ["h", 1], ["i", 3], ["n", 3], ["o", 2], ["p", 1], ["r", 2], ["s", 4], ["t", 3], ["u", 1], ["y", 2]]`.
 
 ```js
 assert.deepEqual(letterFrequency('husband any satisfactory description'), [
@@ -105,7 +105,7 @@ assert.deepEqual(letterFrequency('husband any satisfactory description'), [
 ]);
 ```
 
-`letterFrequency("in various ways--with barefaced")` повинен повернути `[[" ", 3], ["-", 2], ["a", 4], ["b", 1], ["c", 1], ["d", 1], ["e", 2], ["f", 1], ["h", 1], ["i", 3], ["n", 1], ["o", 1], ["r", 2], ["s", 2], ["t", 1], ["u", 1], ["v", 1], ["w", 2], ["y", 1]]`.
+`letterFrequency("in various ways--with barefaced")` має повернути `[[" ", 3], ["-", 2], ["a", 4], ["b", 1], ["c", 1], ["d", 1], ["e", 2], ["f", 1], ["h", 1], ["i", 3], ["n", 1], ["o", 1], ["r", 2], ["s", 2], ["t", 1], ["u", 1], ["v", 1], ["w", 2], ["y", 1]]`.
 
 ```js
 assert.deepEqual(letterFrequency('in various ways--with barefaced'), [
@@ -131,7 +131,7 @@ assert.deepEqual(letterFrequency('in various ways--with barefaced'), [
 ]);
 ```
 
-`letterFrequency("distant surmises; but he eluded")` повинен повернути `[[" ", 4], [";", 1], ["a", 1], ["b", 1], ["d", 3], ["e", 4], ["h", 1], ["i", 2], ["l", 1], ["m", 1], ["n", 1], ["r", 1], ["s", 4], ["t", 3], ["u", 3]]`.
+`letterFrequency("distant surmises; but he eluded")` має повернути `[[" ", 4], [";", 1], ["a", 1], ["b", 1], ["d", 3], ["e", 4], ["h", 1], ["i", 2], ["l", 1], ["m", 1], ["n", 1], ["r", 1], ["s", 4], ["t", 3], ["u", 3]]`.
 
 ```js
 assert.deepEqual(letterFrequency('distant surmises; but he eluded'), [
@@ -153,7 +153,7 @@ assert.deepEqual(letterFrequency('distant surmises; but he eluded'), [
 ]);
 ```
 
-`letterFrequency("last obliged to accept the second-hand,")` повинен повернути `[[" ", 5], [",", 1], ["-", 1], ["a", 3], ["b", 1], ["c", 3], ["d", 3], ["e", 4], ["g", 1], ["h", 2], ["i", 1], ["l", 2], ["n", 2], ["o", 3], ["p", 1], ["s", 2], ["t", 4]]`.
+`letterFrequency("last obliged to accept the second-hand,")` має повернути `[[" ", 5], [",", 1], ["-", 1], ["a", 3], ["b", 1], ["c", 3], ["d", 3], ["e", 4], ["g", 1], ["h", 2], ["i", 1], ["l", 2], ["n", 2], ["o", 3], ["p", 1], ["s", 2], ["t", 4]]`.
 
 ```js
 assert.deepEqual(letterFrequency('last obliged to accept the second-hand,'), [
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/levenshtein-distance.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/levenshtein-distance.md
index 0175286fd4a..18e3b35aa81 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/levenshtein-distance.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/levenshtein-distance.md
@@ -8,11 +8,11 @@ dashedName: levenshtein-distance
 
 # --description--
 
-In information theory and computer science, the **Levenshtein distance** is a metric for measuring the amount of difference between two sequences (i.e. an edit distance). The Levenshtein distance between two strings is defined as the minimum number of edits needed to transform one string into the other, with the allowable edit operations being insertion, deletion, or substitution of a single character.
+В теорії інформації та комп’ютерній науці, **відстань Левенштейна** — це метрика для вимірювання різниці між двома послідовностями (тобто відстань редагування). Відстань Левенштейна між двома рядками визначається як мінімальна кількість операцій додавання, видалення або заміни символа, необхідних для перетворення одного рядка в інший.
 
 Наприклад:
 
-Відстань Левенштейна між "**kitten**" і "**sitting**" складають 3, оскільки неможливо перетворити одне слово в інше за меншу кількість операцій:
+Відстань Левенштейна між **kitten** та **sitting** становить 3, оскільки одне слово в інше неможливо перетворити за менше ніж три операції:
 
 <ul>
   <li><strong>k</strong>itten   <strong>s</strong>itten    (заміна «k» на «s»)</li>
@@ -20,13 +20,13 @@ In information theory and computer science, the **Levenshtein distance** is a me
   <li>sittin   sittin<strong>g</strong>    (додавання «g» вкінці).</li>
 </ul>
 
-*Відстань Левенштейна між "**rosettacode**" та "**raisethysword**" складає **8**.*
+*Відстань Левенштейна між **rosettacode** та **raisethysword** становить **8**.*
 
 *Якщо рядки поміняти місцями, відстань між ними не зміниться.*
 
 # --instructions--
 
-Напишіть функцію, яка повертає відстань Левенштейна між двома рядками, вказаними як параметри.
+Напишіть функцію, яка повертає відстань Левенштейна між двома рядками, заданими як параметри.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/linear-congruential-generator.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/linear-congruential-generator.md
index 9e0e9f69aeb..f2b21b39e4c 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/linear-congruential-generator.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/linear-congruential-generator.md
@@ -1,6 +1,6 @@
 ---
 id: 5e4ce2f5ac708cc68c1df261
-title: Лінійний конгруентний метод
+title: Лінійний конгруентний генератор
 challengeType: 1
 forumTopicId: 385266
 dashedName: linear-congruential-generator
@@ -8,25 +8,25 @@ dashedName: linear-congruential-generator
 
 # --description--
 
-A linear congruential generator (LCG) is an <em>algorithm</em> that yields a sequence of pseudo-randomized numbers calculated with a discontinuous piecewise linear equation. All linear congruential generators use this formula:
+Лінійний конгруентний генератор (LCG) — це <em>алгоритм</em>, який генерує послідовність псевдовипадкових чисел, обчислених за допомогою розривного кусково-лінійного рівняння. Всі лінійні конгруентні генератори використовують цю формулу:
 
 $$r_{n + 1} = (a \times r_n + c) \bmod m$$
 
 Де:
 
 <ul>
-<li>$ r_0 $ is a seed.</li>
-<li>$r_1$, $r_2$, $r_3$, ..., — випадкові числа.</li>
-<li>$a$, $c$, $m$ — константи.</li>
+<li>$ r_0 $ є початковим числом.</li>
+<li>$r_1$, $r_2$, $r_3$, ... є випадковими числами.</li>
+<li>$a$, $c$, $m$ є константами.</li>
 </ul>
 
-Якщо уважно вибирати значення $a$, $c$ і $m$, то генератор створює рівномірний розподіл цілих чисел від $0$ до $m - 1$.
+Якщо ретельно вибрати значення $a$, $c$ та $m$, то генератор утворюватиме рівномірний розподіл цілих чисел від $0$ до $m - 1$.
 
-Числа <abbr title="лінійний конгруентний метод">LCG</abbr> мають низьку якість. $r_n$ та $r\_{n + 1}$ не є незалежними, як справжні випадкові числа. Кожен, хто знає $r_n$, може передбачити $r\_{n + 1}$, тому <abbr title="лінійний конгруентний метод">LCG</abbr> не є криптографічно безпечним. <abbr title="лінійний конгруентний метод">LCG</abbr> все ще достатньо хороший для таких простих завдань, як тест на простоту Міллера-Рабіна або угоди FreeCell. Серед переваг <abbr title="лінійний конгруентний метод">LCG</abbr> можна легко відтворити послідовність чисел з того самого $r_0$. Можна також відтворити таку послідовність за допомогою іншої мови програмування, оскільки формула дуже проста.
+Числа <abbr title="linear congruential generator">LCG</abbr> мають низьку якість. $r_n$ та $r\_{n + 1}$ не є незалежними, як справжні випадкові числа. Будь-хто, хто знає $r_n$, може передбачити $r\_{n + 1}$, тому <abbr title="linear congruential generator">LCG</abbr> не є криптографічно безпечним. Проте <abbr title="linear congruential generator">LCG</abbr> добре справляється з простими завданнями, такими як тест простоти Міллера-Рабіна або роздача в FreeCell. Однією з переваг <abbr title="linear congruential generator">LCG</abbr> є те, що можна легко відтворити послідовність чисел з того самого $r_0$. Формула настільки проста, що таку послідовність можна відтворити іншою мовою програмування.
 
 # --instructions--
 
-Напишіть функцію з параметрами $r_0,a,c,m,n$, яка видає $r_n$.
+Напишіть функцію, яка приймає $r_0,a,c,m,n$ як параметри та повертає $r_n$.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/long-multiplication.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/long-multiplication.md
index 8202f0f23e6..ecda1566745 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/long-multiplication.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/long-multiplication.md
@@ -1,6 +1,6 @@
 ---
 id: 5e4ce2a1ac708cc68c1df25d
-title: Множення в стовпчик
+title: Довге множення
 challengeType: 1
 forumTopicId: 385269
 dashedName: long-multiplication
@@ -8,15 +8,15 @@ dashedName: long-multiplication
 
 # --description--
 
-Explicitly implement long multiplication.
+Реалізуйте довге множення.
 
 Це один з можливих підходів у довгій арифметиці.
 
 # --instructions--
 
-Напишіть функцію, яка враховує масив рядків як параметр. Ваша функція повинна повернути добуток цих двох великих чисел, як рядок.
+Напишіть функцію, яка приймає два рядки великих чисел як параметри. Функція має повернути добуток цих двох великих чисел у вигляді рядка.
 
-**Примітка:** В JavaScript, арифметичні операції з малою кількістю чисел є неточними з великими числами, тому ви повинні самостійно обчислювати.
+**Примітка:** арифметичні операції з великими числами в JavaScript неточні, тому вам потрібно виконати точні розрахунки самостійно.
 
 # --hints--
 
@@ -26,13 +26,13 @@ Explicitly implement long multiplication.
 assert(typeof mult == 'function');
 ```
 
-`mult("18446744073709551616", "18446744073709551616")` повинна видати рядок.
+`mult("18446744073709551616", "18446744073709551616")` має повернути рядок.
 
 ```js
 assert(typeof mult('18446744073709551616', '18446744073709551616') == 'string');
 ```
 
-`mult("18446744073709551616", "18446744073709551616")` повинен повернути `"340282366920938463463374607431768211456"`.
+`mult("18446744073709551616", "18446744073709551616")` має повернути `"340282366920938463463374607431768211456"`.
 
 ```js
 assert.equal(
@@ -41,7 +41,7 @@ assert.equal(
 );
 ```
 
-`mult("31844674073709551616", "1844674407309551616")` повинен повернути `"58743055272886011737990786529368211456"`.
+`mult("31844674073709551616", "1844674407309551616")` має повернути `"58743055272886011737990786529368211456"`.
 
 ```js
 assert.equal(
@@ -50,7 +50,7 @@ assert.equal(
 );
 ```
 
-`mult("1846744073709551616", "44844644073709551616")` повинен повернути `"82816580680737279241781007431768211456"`.
+`mult("1846744073709551616", "44844644073709551616")` має повернути `"82816580680737279241781007431768211456"`.
 
 ```js
 assert.equal(
@@ -59,7 +59,7 @@ assert.equal(
 );
 ```
 
-`mult("1844674407370951616", "1844674407709551616")` повинен повернути`"3402823669833978308014392742590611456"`.
+`mult("1844674407370951616", "1844674407709551616")` має повернути `"3402823669833978308014392742590611456"`.
 
 ```js
 assert.equal(
@@ -68,7 +68,7 @@ assert.equal(
 );
 ```
 
-`mult("2844674407370951616", "1844674407370955616")` повинен повернути `"5247498076580334548376218009219475456"`.
+`mult("2844674407370951616", "1844674407370955616")` має повернути `"5247498076580334548376218009219475456"`.
 
 ```js
 assert.equal(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/longest-common-subsequence.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/longest-common-subsequence.md
index 2127dfc5b41..b515e7c416c 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/longest-common-subsequence.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/longest-common-subsequence.md
@@ -8,23 +8,23 @@ dashedName: longest-common-subsequence
 
 # --description--
 
-The **longest common subsequence** (or **LCS**) of groups A and B is the longest group of elements from A and B that are common between the two groups and in the same order in each group. For example, the sequences `1234` and `1224533324` have an LCS of `1234`:
+**Найдовша спільна підпослідовність** груп A та B — це найдовша група спільних елементів груп A та B, які розташовані в однаковому порядку в обох групах. Наприклад, послідовності `1234` та `1224533324` мають найдовшу спільну підпослідовність `1234`:
 
 <u>1234</u>
 
 <u>12</u>245<u>3</u>332<u>4</u>
 
-На прикладі рядка розглянемо послідовності `thisisatest` та `testing123testing`. LCS буде `tsitest`:
+Для прикладу рядка розглянемо послідовності `thisisatest` та `testing123testing`. Найдовшою спільною підпослідовністю буде `tsitest`:
 
 <u>t</u>hi<u>si</u>sa<u>test</u>
 
 <u>t</u>e<u>s</u>t<u>i</u>ng123<u>test</u>ing.
 
-Ваш код має складатися тільки з рядків.
+Ваш код має обробляти лише рядки.
 
 # --instructions--
 
-Напишіть чутливу до регістру символів функцію, яка повертає LCS двох рядків. Вам не потрібно показувати багато LCS.
+Напишіть чутливу до регістру функцію, яка повертає найдовшу спільну підпослідовність двох рядків. Вам не потрібно відтворювати багато найдовших спільних підпослідовностей.
 
 # --hints--
 
@@ -34,37 +34,37 @@ The **longest common subsequence** (or **LCS**) of groups A and B is the longest
 assert(typeof lcs == 'function');
 ```
 
-`lcs("thisisatest", "testing123testing")` повинен вивести рядок.
+`lcs("thisisatest", "testing123testing")` має повернути рядок.
 
 ```js
 assert(typeof lcs('thisisatest', 'testing123testing') == 'string');
 ```
 
-`lcs("thisisatest", "testing123testing")` повинен повернути `"tsitest"`.
+`lcs("thisisatest", "testing123testing")` має повернути `"tsitest"`.
 
 ```js
 assert.equal(lcs('thisisatest', 'testing123testing'), 'tsitest');
 ```
 
-`lcs("ABCDGH", "AEDFHR")` повинен повернути `"ADH"`.
+`lcs("ABCDGH", "AEDFHR")` має повернути `"ADH"`.
 
 ```js
 assert.equal(lcs('ABCDGH', 'AEDFHR'), 'ADH');
 ```
 
-`lcs("AGGTAB", "GXTXAYB")` повинен повернути `"GTAB"`.
+`lcs("AGGTAB", "GXTXAYB")` має повернути `"GTAB"`.
 
 ```js
 assert.equal(lcs('AGGTAB', 'GXTXAYB'), 'GTAB');
 ```
 
-`lcs("BDACDB", "BDCB")` повинен повернути `"BDCB"`.
+`lcs("BDACDB", "BDCB")` має повернути `"BDCB"`.
 
 ```js
 assert.equal(lcs('BDACDB', 'BDCB'), 'BDCB');
 ```
 
-`lcs("ABAZDC", "BACBAD")` повинен повернути `"ABAD"`.
+`lcs("ABAZDC", "BACBAD")` має повернути `"ABAD"`.
 
 ```js
 assert.equal(lcs('ABAZDC', 'BACBAD'), 'ABAD');
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/longest-increasing-subsequence.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/longest-increasing-subsequence.md
index 76e7c3ae0a7..902918bf5b2 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/longest-increasing-subsequence.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/longest-increasing-subsequence.md
@@ -1,6 +1,6 @@
 ---
 id: 5e6dd139859c290b6ab80292
-title: Задача про найдовшу зростаючу підпослідовність
+title: Найдовша зростаюча підпослідовність
 challengeType: 1
 forumTopicId: 385272
 dashedName: longest-increasing-subsequence
@@ -8,7 +8,7 @@ dashedName: longest-increasing-subsequence
 
 # --description--
 
-The longest increasing subsequence problem is to find a subsequence of a given sequence in which the subsequence's elements are in sorted order, lowest to highest, and in which the subsequence is as long as possible. An example:
+Умова задачі про найдовшу зростаючу підпослідовність: потрібно знайти підпослідовність даної послідовності, де елементи підпослідовності розташовані в порядку зростання, а сама підпослідовність є якомога довшою. Наприклад:
 
 Для наступного масиву:
 
@@ -16,15 +16,15 @@ The longest increasing subsequence problem is to find a subsequence of a given s
 const array = [3, 10, 2, 1, 20];
 ```
 
-Найдовша зростаюча підпослідовність:
+Найдовшою зростаючою послідовністю є:
 
 $\\{3, 10, 20\\}$
 
 # --instructions--
 
-Напишіть функцію, яка приймає масив чисел як параметр і виводить найдовшу зростальну послідовність.
+Напишіть функцію, яка приймає масив чисел як параметр і повертає найдовшу зростаючу підпослідовність.
 
-Гарантовано, що кожен масив матиме найдовшу зростаючу послідовність.
+Гарантовано, що кожен масив матиме найдовшу зростаючу підпослідовність.
 
 # --hints--
 
@@ -34,31 +34,31 @@ $\\{3, 10, 20\\}$
 assert(typeof findSequence == 'function');
 ```
 
-`findSequence([3, 10, 2, 1, 20])` повинен повертати масив.
+`findSequence([3, 10, 2, 1, 20])` має повернути масив.
 
 ```js
 assert(Array.isArray(findSequence([3, 10, 2, 1, 20])));
 ```
 
-`findSequence([3, 10, 2, 1, 20])` повинен повертати `[3, 10, 20]`.
+`findSequence([3, 10, 2, 1, 20])` має повернути `[3, 10, 20]`.
 
 ```js
 assert.deepEqual(findSequence([3, 10, 2, 1, 20]), [3, 10, 20]);
 ```
 
-`findSequence([2, 7, 3, 5, 8])` повинен повертати `[2, 3, 5, 8]`.
+`findSequence([2, 7, 3, 5, 8])` має повернути `[2, 3, 5, 8]`.
 
 ```js
 assert.deepEqual(findSequence([2, 7, 3, 5, 8]), [2, 3, 5, 8]);
 ```
 
-`findSequence([2, 6, 4, 5, 1])` повинен повертати `[2, 4, 5]`.
+`findSequence([2, 6, 4, 5, 1])` має повернути `[2, 4, 5]`.
 
 ```js
 assert.deepEqual(findSequence([2, 6, 4, 5, 1]), [2, 4, 5]);
 ```
 
-`findSequence([10, 22, 9, 33, 21, 50, 60, 80])` повинен повертати `[10, 22, 33, 50, 60, 80]`.
+`findSequence([10, 22, 9, 33, 21, 50, 60, 80])` має повернути `[10, 22, 33, 50, 60, 80]`.
 
 ```js
 assert.deepEqual(findSequence([10, 22, 9, 33, 21, 50, 60, 80]), [
@@ -71,7 +71,7 @@ assert.deepEqual(findSequence([10, 22, 9, 33, 21, 50, 60, 80]), [
 ]);
 ```
 
-`findSequence([0, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15])` повинен повертати `[0, 2, 6, 9, 11, 15`.
+`findSequence([0, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15])` має повернути `[0, 2, 6, 9, 11, 15`.
 
 ```js
 assert.deepEqual(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/longest-string-challenge.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/longest-string-challenge.md
index b01c98cbff0..008ad97f2ae 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/longest-string-challenge.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/longest-string-challenge.md
@@ -1,6 +1,6 @@
 ---
 id: 5e6dd14192286d95fc43046e
-title: Завдання найдовшого рядка
+title: Найдовший рядок
 challengeType: 1
 forumTopicId: 385275
 dashedName: longest-string-challenge
@@ -8,11 +8,11 @@ dashedName: longest-string-challenge
 
 # --description--
 
-In this challenge, you have to find the strings that are the longest among the given strings.
+У цьому завданні вам потрібно знайти рядки, які є найдовшими серед наданих.
 
 # --instructions--
 
-Напишіть функцію, яка приймає масив рядків і повертає рядки, довжина яких дорівнює найдовшій довжині.
+Напишіть функцію, яка приймає масив рядків і повертає рядки, довжина яких є найдовшою.
 
 # --hints--
 
@@ -28,7 +28,7 @@ assert(typeof longestString == 'function');
 assert(Array.isArray(longestString(['a', 'bb', 'ccc', 'ee', 'f', 'ggg'])));
 ```
 
-`longestString(["a", "bb", "ccc", "ee", "f", "ggg"])` має повернути масив `["ccc", "ggg"]`.
+`longestString(["a", "bb", "ccc", "ee", "f", "ggg"])` має повернути `["ccc", "ggg"]`.
 
 ```js
 assert.deepEqual(longestString(['a', 'bb', 'ccc', 'ee', 'f', 'ggg']), [
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/look-and-say-sequence.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/look-and-say-sequence.md
index 013983bff2b..4769c1b11e4 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/look-and-say-sequence.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/look-and-say-sequence.md
@@ -1,6 +1,6 @@
 ---
 id: 5e6dd14797f5ce267c2f19d0
-title: Послідовність "подивися-і-скажи"
+title: Послідовність «глянь і скажи»
 challengeType: 1
 forumTopicId: 385277
 dashedName: look-and-say-sequence
@@ -8,13 +8,13 @@ dashedName: look-and-say-sequence
 
 # --description--
 
-The Look and say sequence is a recursively defined sequence of numbers.
+Послідовність «глянь і скажи» — це рекурсивно визначена послідовність чисел.
 
 Визначення послідовності
 
-<ul><li>Take a decimal number</li>
-<li><span>Подивіться</span>на число, візуально групуючи цифри, які послідовно повторюються.</li>
-<li><span>Назвіть</span> число зліва направо, група за групою; скільки таких цифр можливо.</li></ul><span> Це число стає наступним у послідовності.</span>
+<ul><li>Візьміть десяткове число</li>
+<li><span>Погляньте</span> на число, візуально групуючи послідовні цифри, які повторюються.</li>
+<li><span>Скажіть</span> число зліва направо по групах. Тобто назвіть кількість повторюваних цифр та саму цифру.</li></ul><span> Це число стане наступним числом в послідовності.</span>
 
 Наприклад:
 
@@ -25,7 +25,7 @@ The Look and say sequence is a recursively defined sequence of numbers.
 
 # --instructions--
 
-Напишіть функцію, яка приймає рядок в якості параметра, обробляє його, і повертає результат.
+Напишіть функцію, яка приймає рядок як параметр, обробляє його і повертає кінцевий рядок.
 
 # --hints--
 
@@ -35,37 +35,37 @@ The Look and say sequence is a recursively defined sequence of numbers.
 assert(typeof lookAndSay == 'function');
 ```
 
-`lookAndSay("1")` повинен повернути рядок.
+`lookAndSay("1")` має повернути рядок.
 
 ```js
 assert(typeof lookAndSay('1') == 'string');
 ```
 
-`lookAndSay("1")` повинен повертати `"11"`.
+`lookAndSay("1")` має повернути `"11"`.
 
 ```js
 assert.equal(lookAndSay('1'), '11');
 ```
 
-`lookAndSay("11")` повинен повертати `"21"`.
+`lookAndSay("11")` має повернути `"21"`.
 
 ```js
 assert.equal(lookAndSay('11'), '21');
 ```
 
-`lookAndSay("21")` повинен повертати `"1211"`.
+`lookAndSay("21")` має повернути `"1211"`.
 
 ```js
 assert.equal(lookAndSay('21'), '1211');
 ```
 
-`lookAndSay("1211")` повинен повертати `"111221"`.
+`lookAndSay("1211")` має повернути `"111221"`.
 
 ```js
 assert.equal(lookAndSay('1211'), '111221');
 ```
 
-`lookAndSay("3542")` повинен повертати `"13151412"`.
+`lookAndSay("3542")` має повернути `"13151412"`.
 
 ```js
 assert.equal(lookAndSay('3542'), '13151412');
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/loop-over-multiple-arrays-simultaneously.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/loop-over-multiple-arrays-simultaneously.md
index 9ead05c2b13..aaec7b140d2 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/loop-over-multiple-arrays-simultaneously.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/loop-over-multiple-arrays-simultaneously.md
@@ -1,6 +1,6 @@
 ---
 id: 5e6dd15004c88cf00d2a78b3
-title: Циклічне повторення декількох масивів одночасно
+title: Виконання циклу на декількох масивах одночасно
 challengeType: 1
 forumTopicId: 385279
 dashedName: loop-over-multiple-arrays-simultaneously
@@ -8,15 +8,15 @@ dashedName: loop-over-multiple-arrays-simultaneously
 
 # --description--
 
-Loop over multiple arrays and create a new array whose $i^{th}$ element is the concatenation of $i^{th}$ element of each of the given.
+Виконайте цикл на декількох масивах та створіть новий масив, де $i^{-ий}$ елемент є об’єднанням $i^{-го}$ елемента кожного наданого масиву.
 
-Наприклад, якщо вам дано цей масив масивів:
+Наприклад, якщо дано такий масив масивів:
 
 ```js
 [ ["a", "b", "c"], ["A", "B", "C"], [1, 2, 3] ]
 ```
 
-вихід має бути:
+вихідними даними будуть:
 
 ```js
 ["aA1","bB2","cC3"]
@@ -24,7 +24,7 @@ Loop over multiple arrays and create a new array whose $i^{th}$ element is the c
 
 # --instructions--
 
-Напишіть функцію, яка приймає масив масивів в якості параметра і повертає масив рядків, задовольняючи даний опис.
+Напишіть функцію, яка приймає масив масивів як параметр та повертає масив рядків, задовольняючи даний опис.
 
 # --hints--
 
@@ -34,7 +34,7 @@ Loop over multiple arrays and create a new array whose $i^{th}$ element is the c
 assert(typeof loopSimult == 'function');
 ```
 
-`loopSimult([["a", "b", "c"], ["A", "B", "C"], [1, 2, 3]])` повинен повернути масив.
+`loopSimult([["a", "b", "c"], ["A", "B", "C"], [1, 2, 3]])` має повернути масив.
 
 ```js
 assert(
@@ -48,7 +48,7 @@ assert(
 );
 ```
 
-`loopSimult([["a", "b", "c"], ["A", "B", "C"], [1, 2, 3]])` повинен повернути `["aA1", "bB2", "cC3"]`.
+`loopSimult([["a", "b", "c"], ["A", "B", "C"], [1, 2, 3]])` має повернути `["aA1", "bB2", "cC3"]`.
 
 ```js
 assert.deepEqual(
@@ -61,7 +61,7 @@ assert.deepEqual(
 );
 ```
 
-`loopSimult([["c", "b", "c"], ["4", "5", "C"], [7, 7, 3]])` повинен повернути `["c47", "b57", "cC3"]`.
+`loopSimult([["c", "b", "c"], ["4", "5", "C"], [7, 7, 3]])` має повернути `["c47", "b57", "cC3"]`.
 
 ```js
 assert.deepEqual(
@@ -74,7 +74,7 @@ assert.deepEqual(
 );
 ```
 
-`loopSimult([["a", "b", "c", "d"], ["A", "B", "C", "d"], [1, 2, 3, 4]])` повинн повернути `["aA1", "bB2", "cC3", "dd4"]`.
+`loopSimult([["a", "b", "c", "d"], ["A", "B", "C", "d"], [1, 2, 3, 4]])` має повернути `["aA1", "bB2", "cC3", "dd4"]`.
 
 ```js
 assert.deepEqual(
@@ -87,7 +87,7 @@ assert.deepEqual(
 );
 ```
 
-`loopSimult([["a", "b"], ["A", "B"], [1, 2]])`повинен повернути `["aA1", "bB2"]`.
+`loopSimult([["a", "b"], ["A", "B"], [1, 2]])` має повернути `["aA1", "bB2"]`.
 
 ```js
 assert.deepEqual(
@@ -100,7 +100,7 @@ assert.deepEqual(
 );
 ```
 
-`loopSimult([["b", "c"], ["B", "C"], [2, 3]])` повинен повернути `["bB2", "cC3"]`.
+`loopSimult([["b", "c"], ["B", "C"], [2, 3]])` має повернути `["bB2", "cC3"]`.
 
 ```js
 assert.deepEqual(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/lu-decomposition.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/lu-decomposition.md
index cd539da06fe..daa7e159af7 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/lu-decomposition.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/lu-decomposition.md
@@ -8,21 +8,21 @@ dashedName: lu-decomposition
 
 # --description--
 
-Every square matrix $A$ can be decomposed into a product of a lower triangular matrix $L$ and a upper triangular matrix $U$. This is known as the LU decomposition.
+Кожну квадратну матрицю $A$ можна розкласти у вигляді добутку нижньої трикутної матриці $L$ та верхньої трикутної матриці $U$. Це називають LU-розкладом матриці.
 
 $A = LU$
 
 Таке представлення матриці є модифікованим методом Гауса.
 
-В той час як розклад Холецького тільки працює для симетричних, позитивно-визначених матриць, загальніший LU-розклад матриці працює для будь-якої квадратної матриці.
+Розклад Холецького працює лише для симетричних додатновизначених матриць, а загальніший LU-розклад матриці працює для будь-якої квадратної матриці.
 
-Існують декілька алгоритмів для розрахунку $L$ та $U$.
+Для обчислення $L$ та $U$ існує декілька алгоритмів.
 
-Для отримання *алгоритму Крота* для прикладу 3x3, нам необхідно розв'язати наступну систему:
+Щоб вивести *алгоритм Краута* для прикладу 3×3, потрібно розв’язати наступну систему:
 
 \\begin{align}A = \\begin{pmatrix} a\_{11} & a\_{12} & a\_{13}\\\\ a\_{21} & a\_{22} & a\_{23}\\\\ a\_{31} & a\_{32} & a\_{33}\\\\ \\end{pmatrix}= \\begin{pmatrix} l\_{11} & 0 & 0 \\\\ l\_{21} & l\_{22} & 0 \\\\ l\_{31} & l\_{32} & l\_{33}\\\\ \\end{pmatrix} \\begin{pmatrix} u\_{11} & u\_{12} & u\_{13} \\\\ 0 & u\_{22} & u\_{23} \\\\ 0 & 0 & u\_{33} \\end{pmatrix} = LU\\end{align}
 
-Зараз нам доведеться розв'язати 9 рівнянь з 12 невідомими. Щоб зробити систему унікальною в розв'язанні, зазвичай діагональні елементи $L$ встановлюються на 1
+Нам би довелось розв’язати 9 рівнянь з 12 невідомими. Щоб цю систему можна було розв’язати єдиним чином, зазвичай діагональні елементи $L$ мають значення 1:
 
 $l\_{11}=1$
 
@@ -30,17 +30,17 @@ $l\_{22}=1$
 
 $l\_{33}=1$
 
-тож ми отримали розв'язуючу систему з 9 невідомих та 9 рівнянь.
+Тож ми отримали розв’язну систему з 9 невідомими та 9 рівняннями.
 
 \\begin{align}A = \\begin{pmatrix} a\_{11} & a\_{12} & a\_{13}\\\\ a\_{21} & a\_{22} & a\_{23}\\\\ a\_{31} & a\_{32} & a\_{33}\\\\ \\end{pmatrix} = \\begin{pmatrix} 1 & 0 & 0 \\\\ l\_{21} & 1 & 0 \\\\ l\_{31} & l\_{32} & 1\\\\ \\end{pmatrix} \\begin{pmatrix} u\_{11} & u\_{12} & u\_{13} \\\\ 0 & u\_{22} & u\_{23} \\\\ 0 & 0 & u\_{33} \\end{pmatrix} = \\begin{pmatrix} u\_{11} & u\_{12} & u\_{13} \\\\ u\_{11}l\_{21} & u\_{12}l\_{21}+u\_{22} & u\_{13}l\_{21}+u\_{23} \\\\ u\_{11}l\_{31} & u\_{12}l\_{31}+u\_{22}l\_{32} & u\_{13}l\_{31} + u\_{23}l\_{32}+u\_{33} \\end{pmatrix} = LU\\end{align}
 
-Розв'язуючи для інших $l$ і $u$, ми отримуємо наступні рівняння:
+Знаходячи інші $l$ та $u$, ми отримаємо наступні рівняння:
 
-$u\_{11}=a\_{11}
+$u\_{11}=a\_{11}$
 
-$u\_{12}=a\_{12}
+$u\_{12}=a\_{12}$
 
-$u\_{13}=a\_{13}
+$u\_{13}=a\_{13}$
 
 $u\_{22}=a\_{22} - u\_{12}l\_{21}$
 
@@ -48,7 +48,7 @@ $u\_{23}=a\_{23} - u\_{13}l\_{21}$
 
 $u\_{33}=a\_{33} - (u\_{13}l\_{31} + u\_{23}l\_{32})$
 
-і для $l$:
+та $l$:
 
 $l\_{21}=\\frac{1}{u\_{11}} a\_{21}$
 
@@ -56,17 +56,17 @@ $l\_{31}=\\frac{1}{u\_{11}} a\_{31}$
 
 $l\_{32}=\\frac{1}{u\_{22}} (a\_{32} - u\_{12}l\_{31})$
 
-Як бачимо, існує шаблон обчислення, який можна виразити наступною формулою, спочатку за $U$
+Як бачимо, існує шаблон обчислення, який можна виразити наступними формулами. Спочатку за $U$:
 
 $u\_{ij} = a\_{ij} - \\sum\_{k=1}^{i-1} u\_{kj}l\_{ik}$
 
-і потім для $L$
+і потім за $L$:
 
 $l\_{ij} = \\frac{1}{u\_{jj}} (a\_{ij} - \\sum\_{k=1}^{j-1} u\_{kj}l\_{ik})$
 
-Як бачимо, у другій формулі, щоб отримати $l\_{ij}$ нижче діагоналі, ми повинні поділити на діагональний елемент (значення) $u\_{jj}$, так виникає проблема, коли значення $u\_{jj}$ дорівнює 0 або є дуже малим, що призводить до числової нестабільності.
+Як бачимо у другій формулі, щоб отримати $l\_{ij}$ нижче діагоналі, потрібно виконати ділення на діагональний елемент (опору) $u\_{jj}$. Тому виникне проблема, якщо $u\_{jj}$ дорівнює 0 або має мале значення, оскільки це призводить до нестійкості числового розв’язку.
 
-Розв'язок цього завдання є *вибір головного елемента матриці* $A$, що означає перегрупування рядків $A$, на розклад $LU$ таким чином, щоб найбільший елемент кожної колонки потрапляв на діагональ $A$. Переміщення рядків означає множення $A$ на матрицю перестановки $P$:
+Розв’язком цієї проблеми є *обертання* матриці $A$, тобто перестановка рядків матриці $A$ перед $LU$-розкладанням таким чином, щоб найбільший елемент кожного стовпця опинився на діагоналі матриці $A$. Перестановка рядків означає множення матриці $A$ на перестановкову матрицю $P$:
 
 $PA \\Rightarrow A'$
 
@@ -74,13 +74,13 @@ $PA \\Rightarrow A'$
 
 \\begin{align} \\begin{pmatrix} 0 & 1 \\\\ 1 & 0 \\end{pmatrix} \\begin{pmatrix} 1 & 4 \\\\ 2 & 3 \\end{pmatrix} \\Rightarrow \\begin{pmatrix} 2 & 3 \\\\ 1 & 4 \\end{pmatrix} \\end{align}
 
-Алгоритм розкладки застосовується тоді до перерозміщеної матриці так, щоб
+Тоді до переставленої матриці застосується алгоритм розкладу так, що
 
 $PA = LU$
 
 # --instructions--
 
-Завдання полягає в тому, щоб реалізувати процедуру, яка візьме матрицю nxn $A$ і поверне нижчу трикутну матрицю $L$, верхню трикутну матрицю $U$ і матрицю перестановки $P$, так, щоб розв’язати вищезгадане рівняння. Повернене значення має бути у вигляді `[L, U, P]`.
+Завдання полягає в тому, щоб реалізувати процедуру, яка прийматиме квадратну матрицю $A$ розміром n×n та поверне нижню трикутну матрицю $L$, верхню трикутну матрицю $U$ і перестановкову матрицю $P$, щоб задовольнити рівняння вище. Повернене значення має бути у вигляді `[L, U, P]`.
 
 # --hints--
 
@@ -90,7 +90,7 @@ $PA = LU$
 assert(typeof luDecomposition == 'function');
 ```
 
-`luDecomposition([[1, 3, 5], [2, 4, 7], [1, 1, 0]])` повинен повернути масив.
+`luDecomposition([[1, 3, 5], [2, 4, 7], [1, 1, 0]])` має повернути масив.
 
 ```js
 assert(
@@ -104,7 +104,7 @@ assert(
 );
 ```
 
-`luDecomposition([[1, 3, 5], [2, 4, 7], [1, 1, 0]])` повинен повернути `[[[1, 0, 0], [0.5, 1, 0], [0.5, -1, 1]], [[2, 4, 7], [0, 1, 1.5], [0, 0, -2]], [[0, 1, 0], [1, 0, 0], [0, 0, 1]]]`.
+`luDecomposition([[1, 3, 5], [2, 4, 7], [1, 1, 0]])` має повернути `[[[1, 0, 0], [0.5, 1, 0], [0.5, -1, 1]], [[2, 4, 7], [0, 1, 1.5], [0, 0, -2]], [[0, 1, 0], [1, 0, 0], [0, 0, 1]]]`.
 
 ```js
 assert.deepEqual(
@@ -133,7 +133,7 @@ assert.deepEqual(
 );
 ```
 
-`luDecomposition([[11, 9, 24, 2], [1, 5, 2, 6], [3, 17, 18, 1], [2, 5, 7, 1]])` повинен повернути `[[[1, 0, 0, 0], [0.2727272727272727, 1, 0, 0], [0.09090909090909091, 0.2875, 1, 0], [0.18181818181818182, 0.23124999999999996, 0.0035971223021580693, 1]], [[11, 9, 24, 2], [0, 14.545454545454547, 11.454545454545455, 0.4545454545454546], [0, 0, -3.4749999999999996, 5.6875], [0, 0, 0, 0.510791366906476]], [[1, 0, 0, 0], [0, 0, 1, 0], [0, 1, 0, 0], [0, 0, 0, 1]]]`.
+`luDecomposition([[11, 9, 24, 2], [1, 5, 2, 6], [3, 17, 18, 1], [2, 5, 7, 1]])` має повернути `[[[1, 0, 0, 0], [0.2727272727272727, 1, 0, 0], [0.09090909090909091, 0.2875, 1, 0], [0.18181818181818182, 0.23124999999999996, 0.0035971223021580693, 1]], [[11, 9, 24, 2], [0, 14.545454545454547, 11.454545454545455, 0.4545454545454546], [0, 0, -3.4749999999999996, 5.6875], [0, 0, 0, 0.510791366906476]], [[1, 0, 0, 0], [0, 0, 1, 0], [0, 1, 0, 0], [0, 0, 0, 1]]]`.
 
 ```js
 assert.deepEqual(
@@ -166,7 +166,7 @@ assert.deepEqual(
 );
 ```
 
-`luDecomposition([[1, 1, 1], [4, 3, -1], [3, 5, 3]])` повинен повернути `[[[1, 0, 0], [0.75, 1, 0], [0.25, 0.09090909090909091, 1]], [[4, 3, -1], [0, 2.75, 3.75], [0, 0, 0.9090909090909091]], [[0, 1, 0], [0, 0, 1], [1, 0, 0]]]`.
+`luDecomposition([[1, 1, 1], [4, 3, -1], [3, 5, 3]])` має повернути `[[[1, 0, 0], [0.75, 1, 0], [0.25, 0.09090909090909091, 1]], [[4, 3, -1], [0, 2.75, 3.75], [0, 0, 0.9090909090909091]], [[0, 1, 0], [0, 0, 1], [1, 0, 0]]]`.
 
 ```js
 assert.deepEqual(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/lucas-lehmer-test.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/lucas-lehmer-test.md
index af5637886c4..b4ffe0eee87 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/lucas-lehmer-test.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/lucas-lehmer-test.md
@@ -8,11 +8,11 @@ dashedName: lucas-lehmer-test
 
 # --description--
 
-Lucas-Lehmer Test: for $p$ an odd prime, the Mersenne number $2^p-1$ is prime if and only if $2^p-1$ divides $S(p-1)$ where $S(n+1)=(S(n))^2-2$, and $S(1)=4$.
+Тест Люка-Лемера: число Мерсенна $2^p-1$, де $p$ є непарним простим числом, є простим числом лише за умови, що $S(p-1)$ ділиться на $2^p-1$, де $S(n+1)=(S(n))^2-2$ та $S(1)=4$.
 
 # --instructions--
 
-Напишіть функцію, що покаже, чи є число Мерсенна простим чи ні.
+Напишіть функцію, яка повертає, чи задане число Мерсенна є простим.
 
 # --hints--
 
@@ -22,43 +22,43 @@ Lucas-Lehmer Test: for $p$ an odd prime, the Mersenne number $2^p-1$ is prime if
 assert(typeof lucasLehmer == 'function');
 ```
 
-`lucasLehmer(11)` повинен повернути логічий тип даних.
+`lucasLehmer(11)` має повернути булеве значення.
 
 ```js
 assert(typeof lucasLehmer(11) == 'boolean');
 ```
 
-`lucasLehmer(11)` повинен повернути `false`.
+`lucasLehmer(11)` має повернути `false`.
 
 ```js
 assert.equal(lucasLehmer(11), false);
 ```
 
-`lucasLehmer(15)` повинен повернути `false`.
+`lucasLehmer(15)` має повернути `false`.
 
 ```js
 assert.equal(lucasLehmer(15), false);
 ```
 
-`lucasLehmer(13)` повинен повернути `true`.
+`lucasLehmer(13)` має повернути `true`.
 
 ```js
 assert.equal(lucasLehmer(13), true);
 ```
 
-`lucasLehmer(17)` повинен повернути `true`.
+`lucasLehmer(17)` має повернути `true`.
 
 ```js
 assert.equal(lucasLehmer(17), true);
 ```
 
-`lucasLehmer(19)` повинен повернути `true`.
+`lucasLehmer(19)` має повернути `true`.
 
 ```js
 assert.equal(lucasLehmer(19), true);
 ```
 
-`lucasLehmer(21)` повинен повернути `false`.
+`lucasLehmer(21)` має повернути `false`.
 
 ```js
 assert.equal(lucasLehmer(21), false);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/ludic-numbers.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/ludic-numbers.md
index 73260ced070..1d751f494b7 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/ludic-numbers.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/ludic-numbers.md
@@ -1,6 +1,6 @@
 ---
 id: 5ea281203167d2b0bdefca00
-title: Ігрові числа
+title: Грайливі числа
 challengeType: 1
 forumTopicId: 385282
 dashedName: ludic-numbers
@@ -8,51 +8,51 @@ dashedName: ludic-numbers
 
 # --description--
 
-Ludic numbers are related to prime numbers as they are generated by a sieve quite like the Sieve of Eratosthenes is used to generate prime numbers.
+Грайливі числа пов’язані з простими числами, оскільки вони генеруються за допомогою алгоритму, дуже схожого на решето Ератосфена, яке використовують для генерації простих чисел.
 
-Перше ігрове число - це 1.
+Першим грайливим числом є 1.
 
-Щоб згенерувати наступні ігрові числа, створіть масив зі зростаючих цілих чисел, починаючи від 2.
+Щоб згенерувати наступні грайливі числа, створіть масив зі зростаючих цілих чисел, починаючи з 2.
 
 <code style='margin-left: 2em;'><span style='color:blue;font-weight:bold'>2</span> 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 ...</code>
 
 (Цикл)
 
 <ul>
-  <li>Take the first member of the resultant array as the next ludic number <span style='color:blue;font-weight:bold'>2</span>.</li>
-  <li>Remove every <strong>2<sup>nd</sup></strong> indexed item from the array (including the first).</li>
+  <li>Візьміть перший член отриманого масиву як наступне грайливе число <span style='color:blue;font-weight:bold'>2</span>.</li>
+  <li>Видаліть кожен <strong>2<sup>-ий</sup></strong> елемент з масиву (включно з першим).</li>
   <code style='margin-left: 2em;'><span style='color:blue;font-weight:bold;'><s>2</s></span> 3 <s>4</s> 5 <s>6</s> 7 <s>8</s> 9 <s>10</s> 11 <s>12</s> 13 <s>14</s> 15 <s>16</s> 17 <s>18</s> 19 <s>20</s> 21 <s>22</s> 23 <s>24</s> 25 <s>26</s> ...</code>
 </ul>
 
 <ul>
-  <li>(Unrolling a few loops...)</li>
-  <li>Візьміть перший член результатного масиву як наступне ігрове число <span style='color:blue;font-weight:bold'>3</span>.</li>
-  <li>Видаліть кожен <strong>3<sup>й</sup></strong> пронумерований абзац із масиву (включно з першим).</li>
+  <li>(Виконання декількох циклів...)</li>
+  <li>Візьміть перший член отриманого масиву як наступне грайливе число <span style='color:blue;font-weight:bold'>3</span>.</li>
+  <li>Видаліть кожен <strong>3<sup>-ій</sup></strong> елемент з масиву (включно з першим).</li>
   <code style='margin-left: 2em;'><span style='color:blue;font-weight:bold'><s>3</s></span> 5 7 <s>9</s> 11 13 <s>15</s> 17 19 <s>21</s> 23 25 <s>27</s> 29 31 <s>33</s> 35 37 <s>39</s> 41 43 <s>45</s> 47 49 <s>51</s> ...</code>
 </ul>
 
 <ul>
-  <li>Take the first member of the resultant array as the next ludic number <span style='color:blue;font-weight:bold'>5</span>.</li>
-  <li>Видаліть кожен <strong>5<sup>й</sup></strong> пронумерований абзац із масиву (включно з першим).</li>
+  <li>Візьміть перший член отриманого масиву як наступне грайливе число <span style='color:blue;font-weight:bold'>5</span>.</li>
+  <li>Видаліть кожен <strong>5<sup>-ий</sup></strong> елемент з масиву (включно з першим).</li>
   <code style='margin-left: 2em;'><span style='color:blue;font-weight:bold'><s>5</s></span> 7 11 13 17 <s>19</s> 23 25 29 31 <s>35</s> 37 41 43 47 <s>49</s> 53 55 59 61 <s>65</s> 67 71 73 77 ...</code>
 </ul>
 
 <ul>
-  <li>Take the first member of the resultant array as the next ludic number <span style='color:blue;font-weight:bold'>7</span>.</li>
-  <li>Видаліть кожен <strong>7<sup>й</sup></strong> пронумерований абзац із масиву (включно з першим).</li>
+  <li>Візьміть перший член отриманого масиву як наступне грайливе число <span style='color:blue;font-weight:bold'>7</span>.</li>
+  <li>Видаліть кожен <strong>7<sup>-ий</sup></strong> елемент з масиву (включно з першим).</li>
   <code style='margin-left: 2em;'><span style='color:blue;font-weight:bold'><s>7</s></span> 11 13 17 23 25 29 <s>31</s> 37 41 43 47 53 55 <s>59</s> 61 67 71 73 77 83 <s>85</s> 89 91 97 ...</code>
 </ul>
 
 <ul>
   <li><big><b> ... </b></big></li>
-  <li>Візьміть перший член поточного масиву як наступне ігрове число<span style='color:blue;font-weight:bold'>L</span>.</li>
-  <li>Видаліть кожен <strong>L<sup>й</sup></strong> пронумерований абзац із масиву (включно з першим).</li>
+  <li>Візьміть перший член поточного масиву як наступне грайливе число <span style='color:blue;font-weight:bold'>L</span>.</li>
+  <li>Видаліть кожен <strong>L<sup>-ий</sup></strong> елемент з масиву (включно з першим).</li>
   <li><big><b> ... </b></big></li>
 </ul>
 
 # --instructions--
 
-Запишіть функцію, яка повертає всі ігрові числа, які є меншими або дорівнюють даному числу.
+Напишіть функцію, яка повертає всі грайливі числа, які є меншими або дорівнюють даному числу.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/luhn-test-of-credit-card-numbers.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/luhn-test-of-credit-card-numbers.md
index a4515df2549..87e357dc8bb 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/luhn-test-of-credit-card-numbers.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/luhn-test-of-credit-card-numbers.md
@@ -1,6 +1,6 @@
 ---
 id: 5ea28156e79528a9ab248f27
-title: Тест Луна для визначення номерів кредитних карток
+title: Тест Луна для валідації кредитних карток
 challengeType: 1
 forumTopicId: 385284
 dashedName: luhn-test-of-credit-card-numbers
@@ -8,22 +8,22 @@ dashedName: luhn-test-of-credit-card-numbers
 
 # --description--
 
-The Luhn test is used by some credit card companies to distinguish valid credit card numbers from what could be a random selection of digits.
+Тест Луна використовується деякими компаніями кредитних карток, щоб відрізнити дійсні номери кредитних карток від випадкового набору цифр.
 
-Ті компанії, які використовують номери кредитних карток, котрі можна перевірити за допомогою тесту Луна, мають номери, які проходять наступний тест:
+Ці компанії використовують для своїх кредитних карт такі числа, які можна перевірити за допомогою тесту Луна та які проходять наступний тест:
 
 <ol>
-  <li> Reverse the order of the digits in the number.</li>
-  <li> Із цифр, які записані в зворотньому порядку, треба взяти першу, третю, і кожну іншу непарну цифру та додати їх для формування часткової суми s1</li>
-  <li> Беручи другу, четверту ... та кожну іншу парну цифру із цифр, які записані в зворотньому порядку:</li>
+  <li> Розставте цифри в зворотному порядку.</li>
+  <li> Візьміть першу, третю та інші непарні цифри зі зворотного порядку і додайте їх, щоб утворити часткову суму s1</li>
+  <li> Візьміть другу, четверту та інші парні цифри зі зворотного порядку:</li>
     <ol>
-      <li>Multiply each digit by two and sum the digits if the answer is greater than nine to form partial sums for the even digits.</li>
-      <li>Підсумуйте часткові суми парних чисел, щоб створити s2.</li>
+      <li>Помножте кожну цифру на два та додайте цифри отриманих чисел, якщо відповідь більша за дев’ять, щоб утворити часткові суми парних чисел.</li>
+      <li>Додайте часткові суми парних цифр, щоб утворити s2.</li>
     </ol>
-  <li>Якщо s1 + s2 закінчується нулем, то вихідне число буде у вигляді дійсного номера кредитної картки як перевірено тестом Луна.</li>
+  <li>Якщо сума s1 + s2 закінчується нулем, то початкове число є форматом дійсного номера кредитної картки, перевіреного за допомогою тесту Луна.</li>
 </ol>
 
-Наприклад, якщо пробний номер - 49927398716:
+Наприклад, якщо числом для перевірки є 49927398716:
 
 ```bash
 Reverse the digits:
@@ -44,7 +44,7 @@ s1 + s2 = 70 which ends in zero which means that 49927398716 passes the Luhn tes
 
 # --instructions--
 
-Напишіть функцію, яка дозволить перевірити цифру за допомоги тесту Луна. Повернеться правильно, якщо це є правильним числом. Якщо ні, поверніть false.
+Напишіть функцію, яка дозволить перевірити номер картки за допомогою тесту Луна. Поверніть true, якщо це дійсне число. Якщо ні — поверніть false.
 
 # --hints--
 
@@ -54,7 +54,7 @@ s1 + s2 = 70 which ends in zero which means that 49927398716 passes the Luhn tes
 assert(typeof luhnTest === 'function');
 ```
 
-`luhnTest("4111111111111111")` має повернути логічний тип даних.
+`luhnTest("4111111111111111")` має повернути булеве значення.
 
 ```js
 assert(typeof luhnTest('4111111111111111') === 'boolean');
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/lzw-compression.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/lzw-compression.md
index 15d02a99341..fd1c1dab246 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/lzw-compression.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/lzw-compression.md
@@ -1,6 +1,6 @@
 ---
 id: 5ea2815e364d9a2222ea55f8
-title: LZW компресія
+title: Алгоритм LZW
 challengeType: 1
 forumTopicId: 385288
 dashedName: lzw-compression
@@ -8,11 +8,11 @@ dashedName: lzw-compression
 
 # --description--
 
-The Lempel-Ziv-Welch (LZW) algorithm provides loss-less data compression.
+Алгоритм Лемпеля-Зіва-Велча (LZW) забезпечує стиснення даних без втрат.
 
 # --instructions--
 
-Напишіть функцію, яка бере два параметри. Перший параметр — булеве значення, де `true` позначає стиснути та `false` позначає розвернути. Другий параметр — це рядок або масив для обробки. Якщо це рядок для стиснення, поверніть масив чисел. If it's an array of numbers to be decompressed, return a string.
+Напишіть функцію, яка приймає два параметри. Першим параметром є булеве значення, де `true` позначає стиснення, а `false` позначає розширення. Другим параметром є рядок або масив, який потрібно обробити. Якщо це рядок для стиснення, поверніть масив чисел. Якщо це масив чисел для розширення, поверніть рядок.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/s-expressions.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/s-expressions.md
index 83dcbe0845b..069c4023ad5 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/s-expressions.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/s-expressions.md
@@ -8,21 +8,21 @@ dashedName: s-expressions
 
 # --description--
 
-<a href="https://rosettacode.org/wiki/S-expressions" target="_blank" rel="noopener noreferrer nofollow">S-Expressions</a> are one convenient way to parse and store data.
+<a href="https://rosettacode.org/wiki/S-expressions" target="_blank" rel="noopener noreferrer nofollow">S-вирази</a> — це зручний спосіб для парсингу та зберігання даних.
 
 # --instructions--
 
-Напишіть простий синтаксичний аналізатор для S-виразів, який зможе опрацьовувати рядки та цілі числа в лапках та без них.
+Напишіть простий читач/аналізатор S-виразів, який опрацьовує рядки, цілі числа та числа з плаваючою комою в лапках чи без них.
 
 Функція має зчитувати один, але вкладений S-вираз з рядка і повернути його як (вкладений) масив.
 
-За межами лапок символи розриву строки та інші пробіли можуть бути проігноровані.
+Розділювачі рядків та інші пробіли за межами лапок можуть бути проігноровані.
 
-"`()`" всередині лапок не інтерпретуються, а розглядається як частина рядка.
+Дужки `()` всередині залапкованих рядків не інтерпретуються, а розглядаються як частина рядка.
 
-Обробка пропущених лапок всередині рядка не є обов'язковою; таким чином "`(foo"bar)`" може розглядатися як рядок "`foo"bar`", або як помилка.
+Обробка залапкованих лапок всередині рядка необов’язкова. Тобто `(foo"bar)` може розглядатись як рядок `foo"bar` або як помилка.
 
-Для цього не потрібно розпізнавати `\` для екранування, але окрім того варто розгледіти цифри, якщо мова має відповідні типи даних.
+Для цього читач не повинен визнавати `\` для екранування, але повинен розпізнавати числа, якщо мова має відповідні типи даних.
 
 Зверніть увагу, що, за винятком пробілів та `()"` (`\`, якщо екранування підтримується), спеціальних символів немає. Все інше можна використовувати без лапок.
 
@@ -32,7 +32,7 @@ dashedName: s-expressions
 (data (!@# (4.5) "(more" "data)")))
 </pre>
 
-і перетворити їх на початкову структуру даних.
+і перетворити їх на звичайну структуру даних.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sailors-coconuts-and-a-monkey-problem.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sailors-coconuts-and-a-monkey-problem.md
index 5f0116fb384..ac7a9172e39 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sailors-coconuts-and-a-monkey-problem.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sailors-coconuts-and-a-monkey-problem.md
@@ -1,6 +1,6 @@
 ---
 id: 59da22823d04c95919d46269
-title: 'Задача про моряків, кокоси та мавп'
+title: 'Задача про моряків, кокоси та мавпочку'
 challengeType: 1
 forumTopicId: 302304
 dashedName: sailors-coconuts-and-a-monkey-problem
@@ -8,17 +8,17 @@ dashedName: sailors-coconuts-and-a-monkey-problem
 
 # --description--
 
-Five sailors are shipwrecked on an island and collect a large pile of coconuts during the day.
+П’ять моряків розбилися на острові і назбирали багато кокосів протягом дня.
 
-Тієї ночі перший моряк прокидається і вирішує завчасно взяти свою першу частку, тому намагається поділити купки з кокосами порівно на п’ять маленьких частин, але дізнається, що залишається один кокос, тому він кидає його мавпі і потім ховає «свій» в один із п’яти однакових за розміром куп з кокосами і зіштовхує інші чотири купи разом для того, щоб знову утворити єдину видиму купу з кокосами і йде спати.
+Тієї ночі перший моряк прокидається і вирішує завчасно взяти свою частину, тому намагається поділити всі кокоси порівно на п’ять маленьких купок. Моряк дізнається, що залишається один кокос, тому він кидає його мавпочці, а потім ховає «свою» частину і зіштовхує інші чотири купки разом для того, щоб знову утворити одну купку з кокосами і йде спати.
 
-Коротко кажучи, кожен моряк встає протягом ночі один раз та виконує ті ж самі дії: ділить купу кокосів на 5 частин, знаходить один кокос, що залишився, і віддає його мавпі, потім зіштовхніть інші чотири купи разом, щоб утворити одну купу.
+Коротко кажучи, кожен моряк встає протягом ночі один раз та робить те ж саме: ділить купку кокосів на 5 частин, дізнається про зайвий кокос і віддає його мавпочці, а потім зіштовхує інші чотири купки разом, щоб утворити одну.
 
-Вранці ( після спантеличених та окремих вчинків кожного з п’яти моряків протягом ночі), кокоси, що залишилися були поділені на п’ять однакових куп для кожного з моряків, після чого виявилося, що вони поділені порівно серед моряків без залишку. (Зранку нічого не залишилось для мавпи.)
+Вранці (після таємних вчинків кожного з п’яти моряків протягом ночі) кокоси, що залишилися, були поділені на п’ять однакових купок для кожного з моряків, після чого виявилося, що вони поділені порівно серед моряків без залишку. (Зранку нічого не залишилось для мавпочки.)
 
 # --instructions--
 
-Створіть функцію, що повертає мінімальний можливий розмір початкової купи з кокосами, зібраної протягом дня для `N` моряків. **Примітка:** звичайно, у світі розповідаються казки про збирання будь-якої кількості кокосових горіхів за день і множинні поділи купи тощо, можуть виникнути у час, який відповідає сюжетній лінії, щоб таким чином не впливати на математику.
+Створіть функцію, яка повертає мінімальну можливу кількість кокосів в початковій купці, зібраній протягом дня для `N` моряків. **Примітка:** звичайно, події задачі відбуваються в казковому світі, де збирання кокосів та поділ купок можуть відбуватись в час, який відповідає сюжетній лінії, щоб не впливати на розрахунки.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/search-a-list-of-records.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/search-a-list-of-records.md
index 79c858f1b27..b700f107c22 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/search-a-list-of-records.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/search-a-list-of-records.md
@@ -1,6 +1,6 @@
 ---
 id: 5eb3e497b8d6d7f63c5517ea
-title: Пошук списку записів
+title: Пошук серед записів списку
 challengeType: 1
 forumTopicId: 385315
 dashedName: search-a-list-of-records
@@ -8,11 +8,11 @@ dashedName: search-a-list-of-records
 
 # --description--
 
-A record consists of attributes that describe an entity. Each attribute has a name and a value. For example, a person can have an attribute `age` with a value of 25. An important operation on a list of records is to find a record with a particular attribute value.
+Запис складається з атрибутів, які описують його суть. Кожен атрибут має назву та значення. Наприклад, людина може мати атрибут `age` зі значенням 25. Важлива операція в списку записів — знайти запис з певним значенням атрибута.
 
 # --instructions--
 
-Напишіть функцію, яка приймає рядок як параметр. Функція має повернути індекс елемента в `list`, для якого значення `name` атрибута відповідає заданому рядку.
+Напишіть функцію, яка приймає рядок як параметр. Функція має повернути індекс елемента в списку (`list`), значення атрибута `name` якого відповідає заданому рядку.
 
 # --hints--
 
@@ -22,13 +22,13 @@ A record consists of attributes that describe an entity. Each attribute has a na
 assert(typeof searchCity === 'function');
 ```
 
-`searchCity("Dar Es Salaam")` має повернутися числом.
+`searchCity("Dar Es Salaam")` має повернути число.
 
 ```js
 assert(typeof searchCity('Dar Es Salaam') === 'number');
 ```
 
-`searchCity("Dar Es Salaam")` має повернутись `6`.
+`searchCity("Dar Es Salaam")` має повернути `6`.
 
 ```js
 assert.equal(searchCity('Dar Es Salaam'), 6);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sedols.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sedols.md
index 170e0479661..f4a883a21fb 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sedols.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sedols.md
@@ -1,6 +1,6 @@
 ---
 id: 59d9c6bc214c613ba73ff012
-title: SEDOLs (списки ідентифікаційних кодів цінних паперів)
+title: SEDOL
 challengeType: 1
 forumTopicId: 302305
 dashedName: sedols
@@ -8,9 +8,9 @@ dashedName: sedols
 
 # --description--
 
-<abbr title="Stock Exchange Daily Official List">SEDOL</abbr> is a list of securities identification numbers issued by the London Stock Exchange.
+<abbr title="Stock Exchange Daily Official List">SEDOL</abbr> — це список ідентифікаційних кодів цінних паперів, виданий Лондонською фондовою біржею.
 
-Для кожного списку чисел з 6-цифрових <abbr title="Stock Exchange Daily Official List">SEDOL</abbr>s, порахуйте та додайте число контрольної суми. Тобто враховуючи вхідний рядок зліва, ваша функція повинна повернутися відповідним рядком справа:
+Розрахуйте та додайте цифру контрольної суми до кожного списку з 6-значними кодами <abbr title="Stock Exchange Daily Official List">SEDOL</abbr>. Тобто, якщо дано вхідний рядок зліва, функція має повернути відповідний рядок справа:
 
 <pre>
 710889 => 7108899
@@ -26,7 +26,7 @@ B0YBKT => B0YBKT7
 B00030 => B000300
 </pre>
 
-Перевірте, щоб кожне введення було правильно сформовано, особливо стосовно допустимих символів, дозволених у рядку SEDOL. Ваша функція повинна повернути `null` на недопустиме введення.
+Перевірте, щоб вхідні дані були правильно сформовані (зверніть особливу увагу на допустимі символи в рядку SEDOL). Функція має повернути `null`, якщо вхідні дані недійсні.
 
 # --hints--
 
@@ -36,25 +36,25 @@ B00030 => B000300
 assert(typeof sedol === 'function');
 ```
 
-`sedol('a')` має повернутись нулем.
+`sedol('a')` має повернути `null`.
 
 ```js
 assert(sedol('a') === null);
 ```
 
-`sedol('710889')` має повернути '7108899'.
+`sedol('710889')` має повернути `'7108899'`.
 
 ```js
 assert(sedol('710889') === '7108899');
 ```
 
-`sedol('BOATER')` має повернутись нулем.
+`sedol('BOATER')` має повернути `null`.
 
 ```js
 assert(sedol('BOATER') === null);
 ```
 
-`sedol('228276')` має повернути '2282765'.
+`sedol('228276')` має повернути `'2282765'`.
 
 ```js
 assert(sedol('228276') === '2282765');
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/self-describing-numbers.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/self-describing-numbers.md
index 65fd8467008..b58b569bf73 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/self-describing-numbers.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/self-describing-numbers.md
@@ -1,6 +1,6 @@
 ---
 id: 5eaf48389ee512d4d103684b
-title: Самоописувальні числа
+title: Самоописові числа
 challengeType: 1
 forumTopicId: 385289
 dashedName: self-describing-numbers
@@ -8,11 +8,11 @@ dashedName: self-describing-numbers
 
 # --description--
 
-There are several so-called "self-describing" or "self-descriptive" integers.
+Всього є декілька «самоописових» цілих чисел.
 
-Ціле число називають самоописувальним, якщо воно має такі властивості, коли розряд цифри позначений від 0 до N-1, а цифра в кожній позиції дорівнює тій кількості разів, за яку вона з'являється в числі.
+Ціле число називають самоописовим, якщо воно має таку властивість: цифра на позиції від 0 до N-1 відповідає кількості разів, скільки ця цифра зустрічається в числі.
 
-До прикладу, **2020** — це самоописувальне чотиризначне число:
+Наприклад, **2020** є чотиризначним самоописовим числом:
 
 <ul>
     <li> нульова позиція має значення 2 та в числі наявні два 0; </li>
@@ -21,11 +21,11 @@ There are several so-called "self-describing" or "self-descriptive" integers.
     <li> третя позиція має значення 0 та в числі немає 3; </li>
 </ul>
 
-Самоописувальними числами &lt; 100,000,000 є: 1210, 2020, 21200, 3211000, 42101000.
+Самоописовими числами &lt; 100 000 000 є 1210, 2020, 21200, 3211000, 42101000.
 
 # --instructions--
 
-Напишіть функцію, яка враховує додатне ціле число як параметр. Якщо число самоописувальне, поверніть true. Якщо ні — поверніть false.
+Напишіть функцію, яка приймає натуральне число як параметр. Якщо воно самоописове, то поверніть true. Якщо ні — поверніть false.
 
 # --hints--
 
@@ -35,25 +35,25 @@ There are several so-called "self-describing" or "self-descriptive" integers.
 assert(typeof isSelfDescribing == 'function');
 ```
 
-`isSelfDescribing()` має повертати логічне значення.
+`isSelfDescribing()` має повернути булеве значення.
 
 ```js
 assert(typeof isSelfDescribing(2020) == 'boolean');
 ```
 
-`isSelfDescribing(2020)` має повертати `true`.
+`isSelfDescribing(2020)` має повернути `true`.
 
 ```js
 assert.equal(isSelfDescribing(2020), true);
 ```
 
-`isSelfDescribing(3021)` має повертати `false`.
+`isSelfDescribing(3021)` має повернути `false`.
 
 ```js
 assert.equal(isSelfDescribing(3021), false);
 ```
 
-`isSelfDescribing(3211000)` має повертати `true`.
+`isSelfDescribing(3211000)` має повернути `true`.
 
 ```js
 assert.equal(isSelfDescribing(3211000), true);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/self-referential-sequence.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/self-referential-sequence.md
index 46b8e9a2bea..058c335040d 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/self-referential-sequence.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/self-referential-sequence.md
@@ -8,25 +8,25 @@ dashedName: self-referential-sequence
 
 # --description--
 
-There are several ways to generate a self-referential sequence. One very common one (the <a href="https://rosettacode.org/wiki/Look-and-say_sequence" target="_blank" rel="noopener noreferrer nofollow">Look-and-say sequence</a>) is to start with a positive integer, then generate the next term by concatenating enumerated groups of adjacent alike digits:
+Існує декілька способів згенерувати самовідносну послідовність. Один з найпоширеніших (<a href="https://rosettacode.org/wiki/Look-and-say_sequence" target="_blank" rel="noopener noreferrer nofollow">послідовність «глянь і скажи»</a>) полягає в тому, щоб почати з натурального числа, а потім згенерувати наступний член, об’єднавши названі групи однакових послідовних цифр:
 
 <pre>0, 10, 1110, 3110, 132110, 1113122110, 311311222110 ...</pre>
 
-Створені умови геометрично збільшуються у довжину і ніколи не сходяться.
+Згенеровані члени геометрично зростають в довжині і ніколи не збігаються.
 
-Іншим шляхом створення самовідносної послідовності є узагальнення попередніх значень.
+Інший спосіб згенерувати самовідносну послідовність — підсумувати попередній член.
 
-Порахуйте, скільки тут однакових цифр, тоді об'єднайте суму і цифру для кожної з відсортованих перелічених цифр. Зверніть увагу, що перші п'ять термінів такі ж, як і для попередньої послідовності.
+Підрахуйте кількість однакових цифр, а потім об’єднайте суму та цифру кожної відсортованої названої цифри. Зауважте, що перші п’ять членів співпадають з членами попередньої послідовності.
 
 <pre>0, 10, 1110, 3110, 132110, 13123110, 23124110 ...</pre>
 
-Класифікуйте цифри від найбільшої до найменшої. Не враховуйте кількість цифр, які не з'являються у попередньому значенні.
+Відсортуйте цифри від найбільшої до найменшої. Не враховуйте кількість цифр, які не зустрічаються в попередньому члені.
 
-Залежно від початкового значення, ряди згенеровані таким чином, що завжди або будуть наближені до стабільного значення, або до короткого циклічного шаблону. (Для наших цілей, збіг означає те, що елемент відповідає елементу, який раніше переглядали.) Послідовність, яка представлена з нульовим значенням, наближається до стабільного 1433223110 після 11 ітерацій. Початкове значення, яке збігається найшвидше – нуль. Воно стає стабільним після першого елементу. (Наступний елемент 22, який був розглянутий раніше)
+Залежно від початкового значення, послідовність, згенерована таким чином, завжди збігається або до стійкого значення, або до короткого циклічного шаблону. (Для наших цілей «збігається» означає, що елемент відповідає елементу, який зустрічався раніше.) Послідовність з прикладу, початковим значенням якої є 0, збігається зі стійким значенням 1433223110 після 11 ітерацій. Початковим значенням, яке збігається найшвидше, є 22. Воно стає стійким після першого елемента. Наступним значенням є 22, що вже зустрічалось раніше.
 
 # --instructions--
 
-Створіть функцію, що приймає початкове значення як параметр, генерує самовідносну послідовність допоки вона сходиться, і повертає це як масив.
+Напишіть функцію, яка приймає початкове значення як параметр, генерує самовідносну послідовність до збігу і повертає її у вигляді масиву.
 
 # --hints--
 
@@ -36,13 +36,13 @@ There are several ways to generate a self-referential sequence. One very common
 assert(typeof selfReferential === 'function');
 ```
 
-`selfReferential(40)`має повернути масив.
+`selfReferential(40)` має повернути масив.
 
 ```js
 assert(Array.isArray(selfReferential(40)));
 ```
 
-`selfReferential(40)`повинен повернути`["40", "1410", "142110", "14123110", "1413124110", "2413125110", "151413224110", "152413225110", "251413324110", "152423224110", "152413423110"]`.
+`selfReferential(40)` має повернути `["40", "1410", "142110", "14123110", "1413124110", "2413125110", "151413224110", "152413225110", "251413324110", "152423224110", "152413423110"]`.
 
 ```js
 assert.deepEqual(selfReferential(40), [
@@ -60,7 +60,7 @@ assert.deepEqual(selfReferential(40), [
 ]);
 ```
 
-`selfReferential(132110)`повинен повернути`["132110", "13123110", "23124110", "1413223110", "1423224110", "2413323110", "1433223110"]`.
+`selfReferential(132110)` має повернути `["132110", "13123110", "23124110", "1413223110", "1423224110", "2413323110", "1433223110"]`.
 
 ```js
 assert.deepEqual(selfReferential(132110), [
@@ -74,7 +74,7 @@ assert.deepEqual(selfReferential(132110), [
 ]);
 ```
 
-`selfReferential(132211)`повинен повернути`["132211", "132231", "232221", "134211", "14131231", "14231241", "24132231", "14233221"]`.
+`selfReferential(132211)` має повернути `["132211", "132231", "232221", "134211", "14131231", "14231241", "24132231", "14233221"]`.
 
 ```js
 assert.deepEqual(selfReferential(132211), [
@@ -89,7 +89,7 @@ assert.deepEqual(selfReferential(132211), [
 ]);
 ```
 
-`selfReferential(1413223110)`повинен повернути`["1413223110", "1423224110", "2413323110", "1433223110"]`.
+`selfReferential(1413223110)` має повернути `["1413223110", "1423224110", "2413323110", "1433223110"]`.
 
 ```js
 assert.deepEqual(selfReferential(1413223110), [
@@ -100,7 +100,7 @@ assert.deepEqual(selfReferential(1413223110), [
 ]);
 ```
 
-`selfReferential(251413126110)`повинен повернути`["251413126110", "16151413225110", "16251413226110", "26151413325110", "16251423225110", "16251413424110", "16153413225110"]`.
+`selfReferential(251413126110)` має повернути `["251413126110", "16151413225110", "16251413226110", "26151413325110", "16251423225110", "16251413424110", "16153413225110"]`.
 
 ```js
 assert.deepEqual(selfReferential(251413126110), [
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/semiprime.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/semiprime.md
index 012793911b1..8fd5a7e2743 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/semiprime.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/semiprime.md
@@ -8,13 +8,13 @@ dashedName: semiprime
 
 # --description--
 
-Semiprime numbers are natural numbers that are products of exactly two (possibly equal) <a href="https://rosettacode.org/wiki/prime_number" target="_blank" rel="noopener noreferrer nofollow">prime numbers</a>.
+Напівпрості числа — це натуральні числа, які є добутками двох (можливо рівних) <a href="https://rosettacode.org/wiki/prime_number" target="_blank" rel="noopener noreferrer nofollow">простих чисел</a>.
 
 <pre>1679  =  23 x 73</pre>
 
 # --instructions--
 
-Напишіть функцію, яка повертає true, якщо число є напівпростим, або false, якщо це не так.
+Напишіть функцію, яка повертає true, якщо число є напівпростим, або false, якщо навпаки.
 
 # --hints--
 
@@ -24,7 +24,7 @@ Semiprime numbers are natural numbers that are products of exactly two (possibly
 assert(typeof isSemiPrime === 'function');
 ```
 
-`isSemiPrime(100)` має повернути логічне значення.
+`isSemiPrime(100)` має повернути булеве значення.
 
 ```js
 assert(typeof isSemiPrime(100) === 'boolean');
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/set-consolidation.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/set-consolidation.md
index db1c2fc1958..07aa29aae85 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/set-consolidation.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/set-consolidation.md
@@ -1,6 +1,6 @@
 ---
 id: 5eb3e4af7d0e7b760b46cedc
-title: Встановлення консолідації
+title: Встановлене об’єднання
 challengeType: 1
 forumTopicId: 385319
 dashedName: set-consolidation
@@ -8,42 +8,42 @@ dashedName: set-consolidation
 
 # --description--
 
-Given two sets of items then if any item is common to any set then the result of applying *consolidation* to those sets is a set of sets whose contents is:
+Дано дві множини елементів. Якщо між цими множинами є спільний елемент, то результатом їх *об’єднання* є множина множин, вмістом якої є:
 
 <ul>
   <li>Дві вхідні множини, якщо між ними не існує спільного елемента.</li>
   <li>Одна множина, яка є об’єднанням двох вхідних множин, якщо в них є спільний елемент.</li>
 </ul>
 
-При N наборів елементів, де N > 2, результат буде таким самим, як і багаторазова заміна всіх комбінацій двох наборів їхньою консолідацією. Це триватиме доти, доки подальша консолідація між цими наборами стане неможливою. Якщо N &lt; 2, тоді консолідація не має суворого значення, і вхідні дані можливо повернути.
+Якщо дано N множин елементів, де N > 2, то результат буде таким самим, як і для багаторазової перестановки всіх комбінацій двох множин шляхом їх об’єднання, допоки не буде можливим наступне об’єднання. Якщо N &lt; 2, то об’єднання не має строгого значення та вхідні дані можна повернути.
 
 Ось декілька прикладів:
 
 **Приклад 1:**
 
-Дано два набори `{A,B}` і `{C,D}`, між якими не існує спільного елементу. Результат буде таким самим, як вхідні дані.
+Дано дві множини: `{A,B}` та `{C,D}`. Оскільки між ними немає спільних елементів, результат буде таким же, як і вхідні дані.
 
 **Приклад 2:**
 
-Дано два набори `{A,B}` і `{B,D}`, які мають спільний елемент `B` між наборами. У такому випадку, результатом є єдиний набір `{B,D,A}`. (Зверніть увагу, що порядок елементів у наборі не істотний: `{A,B,D}` те саме, що `{B,D,A}` і `{D,A,B}`, etc).
+Дано дві множини: `{A,B}` та `{B,D}`. Між ними є спільний елемент `B`, тому результатом буде множина `{B,D,A}`. (Зауважте, що порядок елементів не має значення: `{A,B,D}` позначає те ж саме, що й `{B,D,A}`, `{D,A,B}` тощо).
 
 **Приклад 3:**
 
-Дано три набори `{A,B}`, `{C,D}` і `{D,B}`. Набори `{A,B}` і `{C,D}` не мають між собою спільних елементів. Набори `{A,B}` і `{D,B}` мають один спільний елемент, який сприяє їхньому об'єднанню для отримання результату `{B,D,A}`. Проаналізувавши результат з набором `{C,D}`, який залишився, стає зрозумілим, що вони мають спільний елемент, а тому об'єднуються в кінцевий результат єдиного набору `{A,B,C,D}`
+Дано три множини: `{A,B}`, `{C,D}` та `{D,B}`. Між `{A,B}` та `{C,D}` немає спільних елементів, але між `{A,B}` та `{D,B}` є спільний елемент, що утворює результат `{B,D,A}`. Цей результат має спільний елемент з множиною, яка залишилась (`{C,D}`), тому кінцевим результатом буде множина `{A,B,C,D}`.
 
 **Приклад 4:**
 
-Консолідація п'яти наборів:
+Об’єднанням п’яти множин:
 
-`{H,I,K}`, `{A,B}`, `{C,D}`, `{D,B}` і `{F,G,H}`
+`{H,I,K}`, `{A,B}`, `{C,D}`, `{D,B}` та `{F,G,H}`
 
-Два набори:
+є дві множини:
 
-`{A, C, B, D}` і `{G, F, I, H, K}`
+`{A, C, B, D}` та `{G, F, I, H, K}`
 
 # --instructions--
 
-Напишіть функцію, яка приймає масив рядків як параметр. Кожен рядок являє собою набір з символами, що представляють елементи набору. Функція повинна повернути 2D масив, що містить консолідовані набори. Примітка: Кожен набір необхідно відсортувати.
+Напишіть функцію, яка приймає масив рядків як параметр. Кожен рядок представляє множину символів, які є елементами множини. Функція має повернути 2D-масив, який містить об’єднані множини. Примітка: множини мають бути відсортованими.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/set-of-real-numbers.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/set-of-real-numbers.md
index ee92f3d67de..fd4878b4ede 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/set-of-real-numbers.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/set-of-real-numbers.md
@@ -8,7 +8,7 @@ dashedName: set-of-real-numbers
 
 # --description--
 
-All real numbers form the uncountable set ℝ. Among its subsets, relatively simple are the convex sets, each expressed as a range between two real numbers *a* and *b* where *a* ≤ *b*. There are actually four cases for the meaning of "between", depending on open or closed boundary:
+Всі дійсні числа утворюють незліченну множину ℝ. Серед її підмножин, відносно простими є опуклі множини, кожна з яких виражена як діапазон між двома дійсними числами *a* та *b*, де *a* ≤ *b*. Насправді є чотири випадки визначення «між», залежно від відкритої чи закритої межі:
 
 <ul>
   <li>[<i>a</i>, <i>b</i>]: {<i>x</i> | <i>a</i> ≤ <i>x</i> та <i>x</i> ≤ <i>b</i> }</li>
@@ -17,42 +17,42 @@ All real numbers form the uncountable set ℝ. Among its subsets, relatively sim
   <li>(<i>a</i>, <i>b</i>]: {<i>x</i> | <i>a</i> < <i>x</i> та <i>x</i> ≤ <i>b</i> }</li>
 </ul>
 
-Зверніть увагу, що якщо *a* = *b*, то з чотирьох тільки значення *a*, *a*] буде не порожнім.
+Зверніть увагу: якщо *a* = *b*, то з чотирьох лише \[*a*, *a*] буде непорожньою.
 
 **Завдання**
 
 <ul>
-  <li>Devise a way to represent any set of real numbers, for the definition of "any" in the implementation notes below.</li>
-  <li>Наведіть способи для цих загальних операцій з множинами (<i>x</i> - дійсне число; <i>A</i> і <i>B</i> - множини):</li>
+  <li>Придумайте спосіб представити будь-яку множину дійсних чисел, де визначення «будь-якої» вказано в примітках щодо реалізації нижче.</li>
+  <li>Надайте методи для таких звичайних операцій над множинами (<i>x</i> є дійсним числом; <i>A</i> та <i>B</i> є множинами):</li>
   <ul>
     <li>
-      <i>x</i> ∈ <i>A</i>: determine if <i>x</i> is an element of <i>A</i><br>
-      example: 1 is in [1, 2), while 2, 3, ... are not.
+      <i>x</i> ∈ <i>A</i>: визначте, чи <i>x</i> є елементом множини <i>A</i><br>
+      наприклад: 1 є в [1, 2), а 2, 3, ... — ні.
     </li>
     <li>
-      <i>A</i> ∪ <i>B</i>: об'єднання <i>A</i> і <i>B</i>, тобто {<i>x</i> | <i>x</i> ∈ <i>A</i> чи <i>x</i> ∈ <i>B</i>}<br>
-       приклад: [0, 2) ∪ (1, 3) = [0, 3); [0, 1) ∪ (2, 3] = [0, 1) ∪ (2, 3]
+      <i>A</i> ∪ <i>B</i>: об’єднання <i>A</i> та <i>B</i>, тобто {<i>x</i> | <i>x</i> ∈ <i>A</i> або <i>x</i> ∈ <i>B</i>}<br>
+      наприклад: [0, 2) ∪ (1, 3) = [0, 3); [0, 1) ∪ (2, 3] = [0, 1) ∪ (2, 3]
     </li>
     <li>
-      <i>A</i> ∩ <i>B</i>: точка перетину <i>A</i> та <i>B</i>, тобто {<i>x</i> | <i>x</i> ∈ <i>A</i> та <i>x</i> ∈ <i>B</i>}<br>
-      приклад: [0, 2) ∩ (1, 3) = (1, 2); [0, 1) ∩ (2, 3] = порожня множина
+      <i>A</i> ∩ <i>B</i>: перетин <i>A</i> та <i>B</i>, тобто {<i>x</i> | <i>x</i> ∈ <i>A</i> та <i>x</i> ∈ <i>B</i>}<br>
+      наприклад: [0, 2) ∩ (1, 3) = (1, 2); [0, 1) ∩ (2, 3] = порожня множина
     </li>
     <li>
-      <i>A</i> - <i>B</i>: різниця між <i>A</i> та <i>B</i>, також записана як <i>A</i> \ <i>B</i>, тобто  {<i>x</i> | <i>x</i> ∈ <i>A</i> та <i>x</i> ∉ <i>B</i>}<br>
-      приклад: [0, 2) − (1, 3) = [0, 1]
+      <i>A</i> - <i>B</i>: різниця між <i>A</i> та <i>B</i>, також записана як <i>A</i> \ <i>B</i>, тобто {<i>x</i> | <i>x</i> ∈ <i>A</i> та <i>x</i> ∉ <i>B</i>}<br>
+      наприклад: [0, 2) − (1, 3) = [0, 1]
     </li>
   </ul>
 </ul>
 
 # --instructions--
 
-Напишіть функцію, яка приймає 2 об'єкти, рядок і масив як параметри. Об'єкти являють собою множину та мають атрибути: `low`, `high` та `rangeType`.
+Напишіть функцію, яка приймає два об’єкти, рядок і масив як параметри. Об’єкти представляють множину і мають атрибути `low`, `high` та `rangeType`.
 
 `rangeType` може мати значення 0, 1, 2 і 3 для `CLOSED`, `BOTH_OPEN`, `LEFT_OPEN` та `RIGHT_OPEN` відповідно. Функція має реалізувати множину, використовуючи цю інформацію.
 
-Рядок являє собою операцію, яку потрібно виконати над множинами. Це може бути: `"union"`, `"intersect"` та `"subtract"` (різниця).
+Рядок являє собою операцію, яку потрібно виконати над множинами. Це може бути `"union"` (об’єднання), `"intersect"` (перетин) та `"subtract"` (різниця).
 
-Після виконання операції функція повинна перевірити, чи присутні в масиві значення містяться в результатному наборі, і зберегти відповідне логічне значення в масиві. Функція має повернути цей масив.
+Після виконання операції функція має перевірити, чи значення з масиву наявні в отриманій множині, та зберегти відповідне булеве значення в масиві. Функція має повернути цей масив.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sha-1.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sha-1.md
index e94f933d32d..51c9366277f 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sha-1.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sha-1.md
@@ -8,15 +8,15 @@ dashedName: sha-1
 
 # --description--
 
-**SHA-1** or **SHA1** is a one-way hash function; it computes a 160-bit message digest.
+**SHA-1** або **SHA1** — це одностороння хеш-функція, яка обраховує дайджест 160-бітового повідомлення.
 
-SHA-1 часто використовується в протоколах безпеки; до прикладу, багато HTTPS веб-сайтів використовують RSA з SHA-1, аби захистити свої з'єднання.
+SHA-1 часто з’являється в протоколах безпеки. Наприклад, багато вебсайтів HTTPS використовують RSA з SHA-1, щоб захистити своє з’єднання.
 
-BitTorrent використовує SHA-1 для перевірки завантажень.
+BitTorrent використовує SHA-1, щоб перевірити завантаження.
 
-Git і Mercurial використовують дайджести SHA-1 для визначення комітів.
+Git та Mercurial використовують дайджести SHA-1, щоб ідентифікувати зміни.
 
-Стандарт уряду США, <a href="https://rosettacode.org/wiki/SHA-1/FIPS-180-1" target="_blank" rel="noopener noreferrer nofollow">FIPS 180-1</a>, визначає SHA-1.
+SHA-1 визначено в стандартах США <a href="https://rosettacode.org/wiki/SHA-1/FIPS-180-1" target="_blank" rel="noopener noreferrer nofollow">FIPS 180-1</a>.
 
 # --instructions--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sha-256.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sha-256.md
index f5e06dbfe82..19297fbb897 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sha-256.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sha-256.md
@@ -8,11 +8,11 @@ dashedName: sha-256
 
 # --description--
 
-The `SHA-2` family is a stronger alternative to `SHA-1`. The main difference between them is the length of the hash. Meaning `SHA-1` provides a shorter code with fewer possibilities for unique combinations. `SHA-2` or `SHA-256` creates a longer and thus more complex hash with more possibilities.
+Сімейство `SHA-2` — сильніша альтернатива `SHA-1`. Головна відмінність між ними — це довжина хешу. `SHA-1` надає коротший код з меншою кількістю можливих унікальних комбінацій. `SHA-2` (або `SHA-256`) створює довший і складніший хеш з більшою кількістю унікальних комбінацій.
 
 # --instructions--
 
-Дослідіть деталі реалізації та напишіть функцію, яка приймає рядок як параметр і повертає геш, використовуючи `SHA-256`
+Дослідіть деталі реалізації та напишіть функцію, яка приймає рядок як параметр і повертає хеш, використовуючи `SHA-256`
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-an-array-of-composite-structures.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-an-array-of-composite-structures.md
index 29d21dd24be..56cf83b47b9 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-an-array-of-composite-structures.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-an-array-of-composite-structures.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc7ffe
-title: Сортування масивів зі складених структур
+title: Сортування масиву складених структур
 challengeType: 1
 forumTopicId: 302306
 dashedName: sort-an-array-of-composite-structures
@@ -8,7 +8,7 @@ dashedName: sort-an-array-of-composite-structures
 
 # --description--
 
-Write a function that takes an array of objects as a parameter. The function should sort the array according to the 'key' attribute of the objects and return the sorted array.
+Напишіть функцію, яка приймає масив об’єктів як параметр. Функція має відсортувати масив відповідно до атрибута об’єктів «key» і повернути відсортований масив.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-disjoint-sublist.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-disjoint-sublist.md
index bd0ce8535a7..a0bfac580e8 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-disjoint-sublist.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-disjoint-sublist.md
@@ -8,9 +8,9 @@ dashedName: sort-disjoint-sublist
 
 # --description--
 
-Given a list of values and a set of integer indices into that value list, the task is to sort the values at the given indices, but preserving the values at indices outside the set of those to be sorted.
+Дано список значень та множину індексів для цього списку. Потрібно відсортувати значення за заданими індексами, але зберегти значення, індекс яких знаходиться поза множиною тих, які потрібно відсортувати.
 
-Ваша функція повинна працювати з наступним списком значень і набором індексів:
+Функція має працювати з наступним списком значень та множиною індексів:
 
 <code>values: [7, <b>6</b>, 5, 4, 3, 2, <b>1</b>, <b>0</b>]</code>
 
@@ -18,7 +18,7 @@ Given a list of values and a set of integer indices into that value list, the ta
 indices(0-based): {6, 1, 7}
 ```
 
-З наступним правильним результатом:
+Де правильним результатом буде:
 
 <code>[7, <b>0</b>, 5, 4, 3, 2, <b>1</b>, <b>6</b>]</code>.
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-stability.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-stability.md
index b3e915b3ddb..38944dded50 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-stability.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-stability.md
@@ -8,9 +8,9 @@ dashedName: sort-stability
 
 # --description--
 
-When sorting records in a table by a particular column or field, a <a href="https://www.freecodecamp.org/news/stability-in-sorting-algorithms-a-treatment-of-equality-fa3140a5a539/" target="_blank" rel="noopener noreferrer nofollow">stable sort</a> will always retain the relative order of records that have the same key.
+При сортуванні записів в таблиці за певним стовпцем або полем, <a href="https://www.freecodecamp.org/news/stability-in-sorting-algorithms-a-treatment-of-equality-fa3140a5a539/" target="_blank" rel="noopener noreferrer nofollow">стабільне сортування</a> завжди зберігатиме відносний порядок записів з однаковим ключем.
 
-Наприклад, у цій таблиці країн і міст стабільне сортування в **другому** стовпці розташує Бірмінгем у США над Бірмінгемом у Великобританії серед міст. (Хоча нестабільне сортування *може* в цьому випадку розташувати Бірмінгем у США над Бірмінгемом у Великобританії, стабільна процедура сортування це *забезпечить*).
+Наприклад, у цій таблиці країн та міст стабільне сортування в **другому** стовпці (міста) розташує Бірмінгем в США над Бірмінгемом в Англії. (Хоча в цьому випадку нестабільне сортування *може* розташувати Бірмінгем в США над Бірмінгемом в Англії, стабільне сортування це *гарантує*).
 
 <pre>UK  London
 US  New York
@@ -18,7 +18,7 @@ US  Birmingham
 UK  Birmingham
 </pre>
 
-Аналогічним чином стабільне сортування лише першої колонки призведе до розташування «UK London» першим елементом, а «US Birmingham» – останнім (оскільки порядок елементів, що мають одне і те ж перше слово – «UK» або «US» – буде враховуватись).
+Аналогічним чином стабільне сортування лише першої колонки призведе до розташування «UK London» першим елементом, а «US Birmingham» — останнім (оскільки враховується порядок елементів, що мають одне і те ж перше слово: «UK» або «US»).
 
 # --instructions--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-using-a-custom-comparator.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-using-a-custom-comparator.md
index 62d6dcca2b1..eb14ad145c0 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-using-a-custom-comparator.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sort-using-a-custom-comparator.md
@@ -8,7 +8,7 @@ dashedName: sort-using-a-custom-comparator
 
 # --description--
 
-Write a function to sort an array (or list) of strings in order of descending length, and in ascending lexicographic order for strings of equal length.
+Напишіть функцію, щоб відсортувати масив (або список) рядків за зменшенням довжини і за зростанням лексикографічного порядку, якщо рядки однакової довжини.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bead-sort.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bead-sort.md
index be779d4fc1d..78023f60eea 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bead-sort.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bead-sort.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8001
-title: Алгоритми сортування/Метод сортування намистин
+title: 'Алгоритми сортування: сортування бісером'
 challengeType: 1
 forumTopicId: 302310
 dashedName: sorting-algorithmsbead-sort
@@ -8,13 +8,13 @@ dashedName: sorting-algorithmsbead-sort
 
 # --description--
 
-A *bead sort* starts by creating a matrix of zeroes whose length is equal to the value of the largest element in the input array. The matrix is transformed by adding one to all elements between the zeroth index and the index indicated by the current element. This process is repeated, until you have filled the matrix.
+*Сортування бісером* розпочинається зі створення матриці нулів, довжина якої дорівнює значенню найбільшого елемента у вхідному масиві. Матриця змінюється шляхом додавання одиниці до всіх елементів між нульовим індексом та індексом, вказаним поточним елементом. Цей процес повторюється, поки матриця не буде заповненою.
 
-Ітерація по матриці, підсумовування кількості елементів, більших за нуль, а потім зменшення значення кожного елемента на одиницю дає відсортований масив.
+Якщо ітерувати по матриці, додати кількість елементів, більших за нуль, а потім зменшити значення кожного елемента на один, то ми отримаємо відсортований масив.
 
-**Примітка.** кожен елемент у вхідному масиві є унікальним.
+**Примітка:** кожен елемент у вхідному масиві є унікальним.
 
-Відсортуйте масив додатних цілих чисел за допомогою алгоритму Сортування Намистин.
+Відсортуйте масив натуральних чисел за допомогою алгоритму сортування бісером.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bogosort.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bogosort.md
index 3b9c449093e..8566a7a832d 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bogosort.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-bogosort.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8002
-title: Алгоритми сортування/Випадкове сортування
+title: 'Алгоритми сортування: випадкове сортування'
 challengeType: 1
 forumTopicId: 302311
 dashedName: sorting-algorithmsbogosort
@@ -8,15 +8,15 @@ dashedName: sorting-algorithmsbogosort
 
 # --description--
 
-Bogosort a list of numbers.
+Відсортуйте список чисел за допомогою випадкового сортування.
 
-Випадкове сортування просто перемішує набір елементів випадковим чином, поки він не упорядкований.
+Випадкове сортування просто перемішує елементи випадковим чином, поки вони не будуть впорядковані.
 
-«Випадкове сортування» – помилковий, неефективний алгоритм, який використовується лише як жарт.
+«Випадкове сортування» — неефективний алгоритм, який використовується лише як жарт.
 
-Середній час його виконання становить O(n!), бо ймовірність того, що будь-яке перемішування набору закінчиться у відсортованому порядку, становить приблизно один у *n* факторіалі, а в гіршому випадку – нескінченність, оскільки немає гарантії, що випадкове перемішування коли-небудь призведе до упорядкованої послідовності.
+Середній час його виконання становить O(n!), оскільки ймовірність того, що будь-яке перемішування закінчиться у відсортованому порядку, становить приблизно один на *n* факторіалів, а в гіршому випадку — нескінченність, бо немає гарантії, що випадкове перемішування коли-небудь призведе до відсортованої послідовності.
 
-Кращим випадком є O(n), оскільки одного проходження по елементах може бути достатньо, щоб упорядкувати їх.
+Кращим випадком є O(n), оскільки одного проходження по елементах може бути достатньо, щоб впорядкувати їх.
 
 Псевдокод:
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-cocktail-sort.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-cocktail-sort.md
index cf5906b059b..822022a6dc1 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-cocktail-sort.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-cocktail-sort.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8004
-title: Алгоритми сортування/Шейкерне сортування
+title: 'Алгоритми сортування: сортування змішуванням'
 challengeType: 1
 forumTopicId: 302312
 dashedName: sorting-algorithmscocktail-sort
@@ -8,11 +8,11 @@ dashedName: sorting-algorithmscocktail-sort
 
 # --description--
 
-The <a href="https://rosettacode.org/wiki/Sorting_algorithms/Cocktail_sort" target="_blank" rel="noopener noreferrer nofollow">cocktail sort</a> is an improvement on the Bubble Sort. Given an array of numbers, the cocktail sort will traverse the array from start to finish, moving the largest number to the end. Then, it will traverse the array backwards and move the smallest number to the start. It repeats these two passes, moving the next largest/smallest number to its correct position in the array until it is sorted.
+<a href="https://rosettacode.org/wiki/Sorting_algorithms/Cocktail_sort" target="_blank" rel="noopener noreferrer nofollow">Сортування змішуванням</a> — це покращена версія сортування бульбашкою. Маючи масив чисел, сортування змішуванням проходитиме масив від початку до кінця, переміщуючи найбільше число в кінець. Потім він обійде масив у зворотньому порядку та перемістить найменше число на початок. Ці дії повторюються, переміщуючи наступне найбільше/найменше число на правильну позицію в масиві, доки він не буде відсортований.
 
 # --instructions--
 
-Напишіть функцію, яка упорядкує даний масив, використовуючи шейкерне сортування.
+Напишіть функцію, яка впорядкує даний масив, використовуючи сортування змішуванням.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-comb-sort.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-comb-sort.md
index 70fea066479..2355ad22a67 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-comb-sort.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-comb-sort.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8005
-title: Алгоритми сортування/Сортування гребінцем
+title: 'Алгоритми сортування: сортування гребінцем'
 challengeType: 1
 forumTopicId: 302313
 dashedName: sorting-algorithmscomb-sort
@@ -8,42 +8,42 @@ dashedName: sorting-algorithmscomb-sort
 
 # --description--
 
-Implement a *comb sort*.
+Реалізуйте *сортування гребінцем*.
 
-**Сортування Гребінцем** є варіантом Сортування Бульбашками.
+**Сортування гребінцем** є варіацією сортування бульбашкою.
 
-Подібно до сортування Шелла, Сортування Гребінцем збільшує розрив, який використовується під час порівнянь та обмінів.
+Подібно до сортування Шелла, сортування гребінцем збільшує розрив, який використовується під час порівнянь та обмінів.
 
-Поділ розриву найкраще здійснити на $(1-e^{-\\varphi})^{-1} \\approx 1.247330950103979$, але значення 1.3 може бути практичнішим.
+Розрив краще поділити на $(1-e^{-\\varphi})^{-1} \\approx 1.247330950103979$, але 1.3 може бути практичнішим.
 
-Деякі реалізації використовують сортування включенням, коли розрив менший за певну величину.
+Деякі реалізації використовують сортування включенням, якщо розрив стає меншим за певну величину.
 
 Варіанти:
 
 <ul>
-  <li>Combsort11 makes sure the gap ends in (11, 8, 6, 4, 3, 2, 1), which is significantly faster than the other two possible endings.</li>
-  <li>Сортування гребінцем з різними закінченнями змінюється на ефективніше сортування, коли дані майже відсортовані (коли розрив невеликий). Сортування гребінцем з малим розривом не набагато краще, ніж сортування бульбашкою.</li>
+  <li>Combsort11 переконується, що розрив закінчується на (11, 8, 6, 4, 3, 2, 1), що значно швидше, ніж два інші можливих закінчення.</li>
+  <li>Combsort з різними закінченнями переходить до більш ефективного сортування, коли дані практично відсортовані (якщо розрив малий). Сортування гребінцем з малим розривом не набагато краще за сортування бульбашкою.</li>
 </ul>
 
 Псевдокод:
 
 <pre><b>function</b> combsort(<b>array</b> input)
-  gap := input<b>.size</b> <i>//initialize gap size</i>
+  gap := input<b>.size</b> <i>// ініціалізуйте розмір розриву</i>
   <b>loop until</b> gap = 1 <b>and</b> swaps = 0
-    <i>//update the gap value for a next comb. Below is an example</i>
+    <i>// оновіть значення розриву для наступного гребінця. Приклад знизу</i>
     gap := int(gap / 1.25)
     <b>if</b> gap &#x3C; 1 
-      <i>//minimum gap is 1</i>
+      <i>// мінімальний розрив дорівнює 1</i>
       gap := 1
     <b>end if</b>
     i := 0
-    swaps := 0 <i>//see <a href='https://rosettacode.org/wiki/Sorting_algorithms/Bubble_sort' target='_blank'>Bubble Sort</a> for an explanation</i>
-    <i>//a single "comb" over the input list</i>
-    <b>loop until</b> i + gap >= input<b>.size</b> <i>//see <a href='https://rosettacode.org/wiki/Sorting_algorithms/Shell_sort' target='_blank'>Shell sort</a> for similar idea</i>
+    swaps := 0 <i>// див. <a href='https://rosettacode.org/wiki/Sorting_algorithms/Bubble_sort' target='_blank'>сортування бульбашкою</a> для пояснення</i>
+    <i>// єдиний «гребінець» вхідного списку</i>
+    <b>loop until</b> i + gap >= input<b>.size</b> <i>// див. <a href='https://rosettacode.org/wiki/Sorting_algorithms/Shell_sort' target='_blank'>сортування Шелла</a> для схожої ідеї</i>
       <b>if</b> input[i] > input[i+gap]
         <b>swap</b>(input[i], input[i+gap])
-        swaps := 1 <i>// Flag a swap has occurred, so the</i>
-            <i>// list is not guaranteed sorted</i>
+        swaps := 1 <i>// позначте, що відбувся обмін, тому</i>
+            <i>// негарантовано, що список відсортований</i>
       <b>end if</b>
       i := i + 1
     <b>end loop</b>
@@ -53,7 +53,7 @@ Implement a *comb sort*.
 
 # --instructions--
 
-Напишіть функцію, яка упорядкує даний масив, використовуючи сортування гребінцем.
+Напишіть функцію, яка впорядкує даний масив, використовуючи сортування гребінцем.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-gnome-sort.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-gnome-sort.md
index 62d0d7646ce..79df73bfd40 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-gnome-sort.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-gnome-sort.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8007
-title: Алгоритми сортування/Сортування гнома
+title: 'Алгоритми сортування: сортування гнома'
 challengeType: 1
 forumTopicId: 302314
 dashedName: sorting-algorithmsgnome-sort
@@ -8,7 +8,7 @@ dashedName: sorting-algorithmsgnome-sort
 
 # --description--
 
-Gnome sort is a sorting algorithm which is similar to <a href="https://rosettacode.org/wiki/Insertion_sort" target="_blank" rel="noopener noreferrer nofollow">Insertion sort</a>, except that moving an element to its proper place is accomplished by a series of swaps, as in <a href="https://rosettacode.org/wiki/Bubble" target="_blank" rel="noopener noreferrer nofollow">Bubble Sort</a>.
+Сортування гнома — це алгоритм сортування, схожий до <a href="https://rosettacode.org/wiki/Insertion_sort" target="_blank" rel="noopener noreferrer nofollow">алгоритму включенням</a>, за винятком того, що переміщення елемента на потрібне місце відбувається послідовністю змін, як в <a href="https://rosettacode.org/wiki/Bubble" target="_blank" rel="noopener noreferrer nofollow">сортуванні бульбашкою</a>.
 
 Псевдокод для алгоритму:
 
@@ -33,7 +33,7 @@ Gnome sort is a sorting algorithm which is similar to <a href="https://rosettaco
 
 # --instructions--
 
-Напишіть функцію для виконання зазначеного вище псевдокоду. Функція має повернути впорядкований масив.
+Напишіть функцію, щоб реалізувати псевдокод вище. Функція має повернути відсортований масив.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-pancake-sort.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-pancake-sort.md
index 6e32926bdef..23f900f34e6 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-pancake-sort.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-pancake-sort.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc800b
-title: Алгоритми сортування/Млинцеве сортування
+title: 'Алгоритми сортування: сортування млинцями'
 challengeType: 1
 forumTopicId: 302315
 dashedName: sorting-algorithmspancake-sort
@@ -8,9 +8,9 @@ dashedName: sorting-algorithmspancake-sort
 
 # --description--
 
-Write a function to sort an array of integers (of any convenient size) into ascending order using Pancake sorting. The function should return the sorted array.
+Напишіть функцію, щоб відсортувати масив цілих чисел (будь-якого зручного розміру) у порядку зростання за допомогою сортування млинцями. Функція має повернути відсортований масив.
 
-Коротко кажучи, замість сортування окремих елементів єдина дозволена операція – це «перевертання» одного кінця списку, наприклад:
+Коротко кажучи, замість сортування окремих елементів, єдина дозволена операція — це «перевертання» одного кінця списку. Наприклад:
 
 <pre>До:
 <b>6 7 8 9</b> 2 5 3 4 1<br>
@@ -18,7 +18,7 @@ Write a function to sort an array of integers (of any convenient size) into asce
 <b>9 8 7 6</b> 2 5 3 4 1
 </pre>
 
-Можна перевернути тільки один кінець списку. Це повинна бути нижня межа, але допустима й верхня межа, якщо її легше запрограмувати або вона краще працює, але це **повинен** бути один і той самий кінець для цілого розв'язку. (Перевернутий кінець не можна змінити довільно.)
+Можна перевернути лише один кінець списку. Це має бути нижня межа, але допустима й верхня межа, якщо її легше запрограмувати або вона краще працює, але це **повинен** бути один і той самий кінець для повного розв’язку. (Перевернутий кінець не можна змінити довільно.)
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-permutation-sort.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-permutation-sort.md
index 8beca6347d2..4cc60e242ef 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-permutation-sort.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-permutation-sort.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc800c
-title: Алгоритми сортування/Сортування перестановкою
+title: 'Алгоритми сортування: сортування перестановкою'
 challengeType: 1
 forumTopicId: 302316
 dashedName: sorting-algorithmspermutation-sort
@@ -8,7 +8,7 @@ dashedName: sorting-algorithmspermutation-sort
 
 # --description--
 
-Write a function to implement a permutation sort, which proceeds by generating the possible permutations of the input array until discovering the sorted one. The function should return the sorted array.
+Напишіть функцію для реалізації сортування перестановкою, яка продовжує генерувати можливі перестановки вхідного масиву до отримання відсортованого масиву. Функція має повернути відсортований масив.
 
 Псевдокод:
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-shell-sort.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-shell-sort.md
index 9ddaf4bc54c..84559951122 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-shell-sort.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-shell-sort.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8010
-title: Алгоритми сортування/Сортува́ння Ше́лла
+title: 'Алгоритми сортування: сортування Шелла'
 challengeType: 1
 forumTopicId: 302317
 dashedName: sorting-algorithmsshell-sort
@@ -8,17 +8,17 @@ dashedName: sorting-algorithmsshell-sort
 
 # --description--
 
-Write a function to sort an array of elements using the Shell sort algorithm, a diminishing increment sort. The function should return the sorted array.
+Напишіть функцію для сортування масиву елементів за допомогою алгоритму сортування Шелла, що є сортуванням зі зменшенням приросту. Функція має повернути відсортований масив.
 
-Сортування Шелла( також відомий як Шеллове сортування або метод Шелла) названо на честь винахідника Дональда Шелла, який опублікував алгоритм у 1959.
+Сортування Шелла (також відоме як метод Шелла) названо на честь його автора — Дональда Шелла, який опублікував алгоритм у 1959 році.
 
-Сортування Шелла — це послідовність впорядкованих вставних сортувань на основі послідовності приросту. Розмір приросту зменшується після кожного проходу, поки розмір приросту не дорівнюватиме 1.
+Сортування Шелла — це послідовність перемежованих сортувань включенням на основі послідовності приросту. Величина приросту зменшується після кожного проходження, поки не дорівнюватиме 1.
 
-З розміром приросту 1 сортування є базовим сортуванням вставкою, але до цього часу дані гарантовано будуть майже відсортовані, що є «найкращим випадком» сортування вставкою.
+Сортування з величиною приросту 1 — це базове сортування включенням, але до цього часу дані практично відсортовані, що є «найкращим випадком» для сортування включенням.
 
-Будь-яка послідовність сортує дані до тих пір, поки вони закінчується на 1, але деякі працюють краще, ніж інші.
+Будь-яка послідовність сортуватиме дані, поки вона закінчується на 1, але деякі працюють краще за інші.
 
-Емпіричні дослідження показали, що геометрична послідовність приросту з коефіцієнтом приблизно 2,2 добре працює на практиці.
+Емпіричні дослідження показали, що геометрична послідовність приросту з відношенням приблизно 2.2 добре працює на практиці.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-stooge-sort.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-stooge-sort.md
index d5a297d7d81..dea97a9ee49 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-stooge-sort.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-stooge-sort.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8012
-title: Алгоритми сортування/Сортування по частинах
+title: 'Алгоритми сортування: недолуге сортування'
 challengeType: 1
 forumTopicId: 302318
 dashedName: sorting-algorithmsstooge-sort
@@ -8,9 +8,9 @@ dashedName: sorting-algorithmsstooge-sort
 
 # --description--
 
-Write a function to perform Stooge Sort on an array of integers. The function should return a sorted array.
+Напишіть функцію, щоб виконати недолуге сортування на масиві цілих чисел. Функція має повернути відсортований масив.
 
-Алгоритм сортування по частинах виглядає наступним чином:
+Алгоритм недолугого сортування:
 
 <pre><b>algorithm</b> stoogesort(<b>array</b> L, i = 0, j = <b>length</b>(L)-1)
   <b>if</b> L[j] &#x3C; L[i] <b>then</b>
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-strand-sort.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-strand-sort.md
index 7472c634344..94591503816 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-strand-sort.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sorting-algorithms-strand-sort.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8013
-title: Алгоритми сортування/Ниткоподібне сортування
+title: 'Алгоритми сортування: ниткоподібне сортування'
 challengeType: 1
 forumTopicId: 302319
 dashedName: sorting-algorithmsstrand-sort
@@ -8,20 +8,20 @@ dashedName: sorting-algorithmsstrand-sort
 
 # --description--
 
-The **Strand sort** creates sorted subsets that are merged to create the final result.
+**Ниткоподібне сортування** утворює відсортовані підмножини, які об’єднуються в кінцевий результат.
 
-Розглянемо `unsortedArray = [3, 1, 4, 2]`. Оберіть перший елемент `3` та скопіюйте його в окремий масив. Шукайте будь-який більший елемент який слідкує за цим елементом. Коли ви знайдете більший елемент, у цьому випадку `4`, скопіюйте його в окремий масив, `[3, 4]`, та порівняйте наступні елементи з цим новим значенням, `4`.
+Розглянемо `unsortedArray = [3, 1, 4, 2]`. Візьміть перший елемент `3` та скопіюйте його в окремий масив. Знайдіть будь-який більший елемент після цього елемента. Коли знайдете більший елемент, в цьому випадку `4`, скопіюйте його в окремий масив `[3, 4]` та порівняйте наступні елементи з новим значенням `4`.
 
-Після досягнення кінця масиву, видаліть елементи, які ви скопіювали, `[3, 4]`, та почніть знову з першого елемента, що залишився в `unsortedArray`, у цьому випадку `1`.
+Як тільки досягнете кінця масиву, видаліть елементи, які ви копіювали (`[3, 4]`) та розпочніть знову з першого елемента, який залишився в `unsortedArray`, в цьому випадку `1`.
 
-Результатом цього процесу є два відсортовані масиви, `[3, 4]` та `[1, 2]`. Об’єднайте ці два масиви, щоб створити `strandSortedArray`.
+У результаті ви отримаєте два відсортовані масиви: `[3, 4]` та `[1, 2]`. Об’єднайте ці два масиви, щоб утворити `strandSortedArray`.
 
 ```js
 const unsortedArray = [3, 1, 4, 2];
 const strandsortedArray = [1, 2, 3, 4];
 ```
 
-Напишіть функцію для сортування масиву, використовуючи **Ниткоподібне сортування**. Функція має повернути впорядкований масив.
+Напишіть функцію, щоб відсортувати масив за допомогою **ниткоподібного сортування**. Функція має повернути відсортований масив.
 
 
 # --hints--
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/soundex.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/soundex.md
index 6dd19d0c81e..72c7905c913 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/soundex.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/soundex.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8017
-title: Алгоритм Саундекс
+title: Алгоритм саундекс
 challengeType: 1
 forumTopicId: 302320
 dashedName: soundex
@@ -8,15 +8,15 @@ dashedName: soundex
 
 # --description--
 
-**Soundex Algorithm** deals with the *intentions* of the words. It creates a representation for similar sounding words.
+**Алгоритм саундекс** працює з *вимовою* слів. Він створює представлення для схожих за звучанням слів.
 
-Він використовується для пошуку <em>імен</em> та <em>адрес</em>. Це означає, що особа, яка ввела <em>ім’я</em>, може зосередитися на тому, як воно звучить, а не виправляти написання <em>імен</em>.
+Його використовують для пошуку <em>імен</em> та <em>адрес</em>. Тобто людина, яка ввела <em>ім’я</em>, може зосередитися на тому, як воно звучить, а не пишеться.
 
 Наприклад:
 
-Якщо ви вперше почули ім’я `Quenci` та ввели його неправильно, ви отримаєте код **Soundex** `Q520`.
+Якщо ви вперше почули ім’я `Quenci` та неправильно написали його, ви отримаєте **саундекс-код** `Q520`.
 
-Коли ви наступного разу правильно напишете ім’я `Quincy`, ви все одно отримаєте той самий код `Q520`, що означає, що ви можете зв’язати кілька варіантів вимови імені в одну <em mark="crwd -mark">особу</em> без необхідності додавати всі варіанти написання.
+Якщо наступного разу ви напишете ім’я `Quincy` правильно, ви все одно отримаєте той самий код `Q520`. Це означає, що ви можете пов’язати декілька варіантів вимови імені до одної <em>людини</em> без необхідності додавати всі варіанти написання.
 
 Ось правила:
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/spiral-matrix.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/spiral-matrix.md
index 01f33ae6a8f..d87b3797a30 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/spiral-matrix.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/spiral-matrix.md
@@ -8,7 +8,7 @@ dashedName: spiral-matrix
 
 # --description--
 
-Produce a spiral array. A *spiral array* is a square arrangement of the first N<sup>2</sup> natural numbers, where the numbers increase sequentially as you go around the edges of the array spiraling inwards. For example, given **5**, produce this array:
+Створіть спіральний масив. *Спіральний масив* — це квадратне розташування перших N<sup>2</sup> натуральних чисел, де числа послідовно збільшуються по краях масиву до середини. Наприклад, якщо дано **5**, то результатом буде:
 
 <pre>
 0  1  2  3  4
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/split-a-character-string-based-on-change-of-character.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/split-a-character-string-based-on-change-of-character.md
index ea1303b2d60..e0e6bce5e1e 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/split-a-character-string-based-on-change-of-character.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/split-a-character-string-based-on-change-of-character.md
@@ -8,13 +8,13 @@ dashedName: split-a-character-string-based-on-change-of-character
 
 # --description--
 
-Split a (character) string into comma (plus a blank) delimited strings based on a change of character (left to right). Blanks should be treated as any other character (except they are problematic to display clearly). The same applies to commas. For instance, the string:
+Розділіть рядок символів на рядки, розділені комами та пробілом, на основі зміни символів (зліва направо). Пробіли потрібно розглядати як будь-які інші символи (за винятком ситуацій, коли їх важко відтворити чітко). Те саме стосується й ком. Наприклад, рядок:
 
 <pre>
 "gHHH5YY++///\\"
 </pre>
 
-повинен розділитися як:
+потрібно розділити як:
 
 <pre>
 ["g", "HHH", "5", "YY", "++", "///", "\\" ];
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/state-name-puzzle.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/state-name-puzzle.md
index a0fee0bfabb..12325199897 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/state-name-puzzle.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/state-name-puzzle.md
@@ -8,14 +8,14 @@ dashedName: state-name-puzzle
 
 # --description--
 
-**State name** is a <em>word puzzle</em> in which you take the letters from two U.S. state names and rearrange them to form the names of two different U.S. states.
+**Назва штату** — це <em>головоломка з пошуку слів</em>, у якій ви обираєте літери з назв двох штатів США та змінюєте їх порядок так, щоб утворити назви двох інших штатів США.
 
 
 # --instructions--
 
-Write a function to solve the challenge for a given array of actual U.S. state names, and for fictional state names.
+Напишіть функцію, щоб розв’язати головоломку для заданого масиву реальних назв штатів США та вигаданих назв.
 
-Функція має повернути масив. Кожен елемент має бути об’єктом у цьому вигляді: `{"from":[],"to":[]}`. Масив `from` повинен містити оригінальні назви, а масив `to` повинен містити отримані назви.
+Функція має повернути масив. Кожен елемент має бути об’єктом у такому форматі: `{"from":[],"to":[]}`. Масив `from` повинен містити реальні назви, а масив `to` повинен містити отримані назви.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/stern-brocot-sequence.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/stern-brocot-sequence.md
index c38a748b4c9..705585ff46a 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/stern-brocot-sequence.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/stern-brocot-sequence.md
@@ -8,7 +8,7 @@ dashedName: stern-brocot-sequence
 
 # --description--
 
-For this task, the Stern-Brocot sequence is to be generated by an algorithm similar to that employed in generating the <a href="https://rosettacode.org/wiki/Fibonacci_sequence" target="_blank" rel="noopener noreferrer nofollow">Fibonacci sequence</a>.
+У цьому завданні потрібно згенерувати послідовність Штерна-Броко за допомогою алгоритму, схожого до генерації <a href="https://rosettacode.org/wiki/Fibonacci_sequence" target="_blank" rel="noopener noreferrer nofollow">послідовності Фібоначчі</a>.
 
 <ol>
   <li>Перший та другий члени послідовності дорівнюють 1:</li>
@@ -27,14 +27,14 @@ For this task, the Stern-Brocot sequence is to be generated by an algorithm simi
     </ul>
   <li>Додайте аналізований член послідовності до попереднього (2 + 1) = 3 та приєднайте результат до кінця послідовності:</li>
     <ul><li>1, 1, 2, 1, 3</li></ul>
-  <li>Приєднайте аналізований член до кінця послідовності:</li>
+  <li>Приєднайте аналізований член послідовності до кінця послідовності:</li>
     <ul><li>1, 1, 2, 1, 3, 2</li></ul>
   <li>Проаналізуйте наступний член послідовності (тобто четвертий член, 1)</li>
 </ol>
 
 # --instructions--
 
-Створіть функцію, яка повертає позицію у послідовності Штерна-Броко, в якій $ n $ зустрічається вперше, де послідовність генерується методом, описаним вище. Зверніть увагу, що ця послідовність використовує індексацію на основі 1.
+Створіть функцію, яка повертає позицію у послідовності Штерна-Броко, в якій $n$ зустрічається вперше, де послідовність генерується методом, описаним вище. Зверніть увагу, що ця послідовність використовує індексацію на основі 1.
 
 # --hints--
 
@@ -44,37 +44,37 @@ For this task, the Stern-Brocot sequence is to be generated by an algorithm simi
 assert(typeof sternBrocot == 'function');
 ```
 
-`sternBrocot(2)` має повертати число.
+`sternBrocot(2)` має повернути число.
 
 ```js
 assert(typeof sternBrocot(2) == 'number');
 ```
 
-`sternBrocot(2)` має повертати `3`.
+`sternBrocot(2)` має повернути `3`.
 
 ```js
 assert.equal(sternBrocot(2), 3);
 ```
 
-`sternBrocot(3)` має повертати `5`.
+`sternBrocot(3)` має повернути `5`.
 
 ```js
 assert.equal(sternBrocot(3), 5);
 ```
 
-`sternBrocot(5)` має повертати `11`.
+`sternBrocot(5)` має повернути `11`.
 
 ```js
 assert.equal(sternBrocot(5), 11);
 ```
 
-`sternBrocot(7)` має повертати `19`.
+`sternBrocot(7)` має повернути `19`.
 
 ```js
 assert.equal(sternBrocot(7), 19);
 ```
 
-`sternBrocot(10)` має повертати `39`.
+`sternBrocot(10)` має повернути `39`.
 
 ```js
 assert.equal(sternBrocot(10), 39);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/straddling-checkerboard.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/straddling-checkerboard.md
index cfe32f9fac8..25ef5b0e7c1 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/straddling-checkerboard.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/straddling-checkerboard.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8029
-title: Перекидна шахова дошка
+title: Розширена шахівниця
 challengeType: 1
 forumTopicId: 302325
 dashedName: straddling-checkerboard
@@ -8,13 +8,13 @@ dashedName: straddling-checkerboard
 
 # --description--
 
-Implement functions to encrypt and decrypt a message using the **straddling checkerboard** method.
+Реалізуйте функції, щоб шифрувати та дешифрувати повідомлення за допомогою методу **розширеної шахівниці**.
 
-Кожна функція прийматиме два аргументи: рядок `message` та масив `alphabet`. Масив `alphabet` міститиме 3 рядки, що представляють 3 рядки перекидної шахової дошки.
+Кожна функція прийматиме два аргументи: рядок `message` та масив `alphabet`. Масив `alphabet` міститиме 3 рядки, які представляють 3 рядки розширеної шахівниці.
 
-Результатом функції `straddle()` повинен бути ряд десяткових цифр. Цифри мають бути зашифровані шляхом вставлення екранованого символу перед кожною цифрою, а потім включати <em>дешифровану</em> цифру.
+Вихідними даними функції `straddle()` має бути множина десяткових цифр. Цифри мають бути зашифровані шляхом вставлення екранованого символу перед кожною цифрою, а потім містити <em>дешифровану</em> цифру.
 
-Це має бути перевернуто для розшифровки з функцією `unstraddle()`.
+Цей спосіб має бути оберненим для дешифрування за допомогою функції `unstraddle()`.
 
 # --hints--
 
@@ -24,7 +24,7 @@ Implement functions to encrypt and decrypt a message using the **straddling chec
 assert(typeof straddle == 'function');
 ```
 
-`straddle("One night-it was on the twentieth of March, 1888-I was returning.",["ESTONIA  R", "BCDFGHJKLM", "PQUVWXYZ./"])` має повернутись рядком.
+`straddle("One night-it was on the twentieth of March, 1888-I was returning.",["ESTONIA  R", "BCDFGHJKLM", "PQUVWXYZ./"])` має повернути рядок.
 
 ```js
 assert(
@@ -35,7 +35,7 @@ assert(
 );
 ```
 
-`straddle("One night-it was on the twentieth of March, 1888-I was returning.",["ESTONIA  R", "BCDFGHJKLM", "PQUVWXYZ./"])` має повернутись `"34045747525284613427502840425027537379697175891898898898584619028294547488"`.
+`straddle("One night-it was on the twentieth of March, 1888-I was returning.",["ESTONIA  R", "BCDFGHJKLM", "PQUVWXYZ./"])` має повернути `"34045747525284613427502840425027537379697175891898898898584619028294547488"`.
 
 ```js
 assert.equal(
@@ -47,7 +47,7 @@ assert.equal(
 );
 ```
 
-`straddle("One night-it was on the twentieth of March, 1888-I was returning",["HOL MES RT", "ABCDFGIJKN", "PQUVWXYZ./"])` має повернутись `"139539363509369743061399059745399365901344308320791798798798367430685972839363935"`.
+`straddle("One night-it was on the twentieth of March, 1888-I was returning",["HOL MES RT", "ABCDFGIJKN", "PQUVWXYZ./"])` має повернути `"139539363509369743061399059745399365901344308320791798798798367430685972839363935"`.
 
 ```js
 assert.equal(
@@ -60,7 +60,7 @@ assert.equal(
 );
 ```
 
-`straddle("Thecheckerboardcakerecipespecifies3largeeggsand2.25cupsofflour.",["ET AON RIS", "BCDFGHJKLM", "PQ/UVWXYZ."])` має повернутись `"125021250212707204372221327070218600960021823809623283724002424935226226962262521636094232328463769"`.
+`straddle("Thecheckerboardcakerecipespecifies3largeeggsand2.25cupsofflour.",["ET AON RIS", "BCDFGHJKLM", "PQ/UVWXYZ."])` має повернути `"125021250212707204372221327070218600960021823809623283724002424935226226962262521636094232328463769"`.
 
 ```js
 assert.equal(
@@ -79,7 +79,7 @@ assert.equal(
 assert(typeof unstraddle == 'function');
 ```
 
-`unstraddle("34045747525284613427502840425027537379697175891898898898584619028294547488",["ESTONIA  R", "BCDFGHJKLM", "PQUVWXYZ./"])` має повернутись стрічкою.
+`unstraddle("34045747525284613427502840425027537379697175891898898898584619028294547488",["ESTONIA  R", "BCDFGHJKLM", "PQUVWXYZ./"])` має повернути рядок.
 
 ```js
 assert(
@@ -90,7 +90,7 @@ assert(
 );
 ```
 
-`unstraddle("34045747525284613427502840425027537379697175891898898898584619028294547488",["ESTONIA  R", "BCDFGHJKLM", "PQUVWXYZ./"])` має повернутись `"ONENIGHTITWASONTHETWENTIETHOFMARCH1888IWASRETURNING."`.
+`unstraddle("34045747525284613427502840425027537379697175891898898898584619028294547488",["ESTONIA  R", "BCDFGHJKLM", "PQUVWXYZ./"])` має повернути `"ONENIGHTITWASONTHETWENTIETHOFMARCH1888IWASRETURNING."`.
 
 ```js
 assert.equal(
@@ -102,7 +102,7 @@ assert.equal(
 );
 ```
 
-`unstraddle("139539363509369743061399059745399365901344308320791798798798367430685972839363935",["HOL MES RT", "ABCDFGIJKN", "PQUVWXYZ./"])` має повернутись `"ONENIGHTITWASONTHETWENTIETHOFMARCH1888IWASRETURNING"`.
+`unstraddle("139539363509369743061399059745399365901344308320791798798798367430685972839363935",["HOL MES RT", "ABCDFGIJKN", "PQUVWXYZ./"])` має повернути `"ONENIGHTITWASONTHETWENTIETHOFMARCH1888IWASRETURNING"`.
 
 ```js
 assert.equal(
@@ -114,7 +114,7 @@ assert.equal(
 );
 ```
 
-`unstraddle("125021250212707204372221327070218600960021823809623283724002424935226226962262521636094232328463769",["ET AON RIS", "BCDFGHJKLM", "PQ/UVWXYZ."])` має повернутись `"THECHECKERBOARDCAKERECIPESPECIFIES3LARGEEGGSAND2.25CUPSOFFLOUR."`.
+`unstraddle("125021250212707204372221327070218600960021823809623283724002424935226226962262521636094232328463769",["ET AON RIS", "BCDFGHJKLM", "PQ/UVWXYZ."])` має повернути `"THECHECKERBOARDCAKERECIPESPECIFIES3LARGEEGGSAND2.25CUPSOFFLOUR."`.
 
 ```js
 assert.equal(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/stream-merge.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/stream-merge.md
index 2e6ea2542ca..7b22cebc029 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/stream-merge.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/stream-merge.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc802a
-title: Злиття Потоків
+title: Злиття потоків
 challengeType: 1
 forumTopicId: 302326
 dashedName: stream-merge
@@ -8,7 +8,7 @@ dashedName: stream-merge
 
 # --description--
 
-Write a function that takes multiple sorted arrays of items, and returns one array of sorted items.
+Напишіть функцію, яка приймає декілька відсортованих масивів та повертає один відсортований масив.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/strip-control-codes-and-extended-characters-from-a-string.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/strip-control-codes-and-extended-characters-from-a-string.md
index 5de86edb875..1f1e98acb4d 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/strip-control-codes-and-extended-characters-from-a-string.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/strip-control-codes-and-extended-characters-from-a-string.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8036
-title: Коди керування рядка і додаткові символи рядка
+title: Видалення керівних кодів та розширених символів з рядка
 challengeType: 1
 forumTopicId: 302327
 dashedName: strip-control-codes-and-extended-characters-from-a-string
@@ -8,7 +8,7 @@ dashedName: strip-control-codes-and-extended-characters-from-a-string
 
 # --description--
 
-The task is to strip control codes and extended characters from a string. The solution should demonstrate how to achieve each of the following results: A string with control codes and extended characters stripped. In ASCII, the control codes have decimal codes 0 through to 31 and 127. On an ASCII based system, if the control codes are stripped, the resultant string would have all of its characters within the range of 32 to 126 decimal on the ASCII table. On a non-ASCII based system, we consider characters that do not have a corresponding glyph on the ASCII table (within the ASCII range of 32 to 126 decimal) to be an extended character for the purpose of this task.
+Ваше завдання — видалити керівні коди та розширені символи з рядка. Розв’язок має продемонструвати, як в результаті отримати рядок з видаленими керівними кодами та розширеними символами. Керівні коди в ASCII мають десяткові коди від 0 до 31 та 127. На системі, заснованій на ASCII: якщо видалити керівні коди, то вихідний рядок міститиме всі свої символи в діапазоні від 32 до 126 десяткових з таблиці ASCII. На системі, не заснованій на ASCII: ми вважаємо символи, які не мають відповідного гліфа на таблиці ASCII (у межах діапазону ASCII від 32 до 126 десяткових), розширеними символами з метою цього завдання.
 
 # --hints--
 
@@ -18,37 +18,37 @@ The task is to strip control codes and extended characters from a string. The so
 assert(typeof strip == 'function');
 ```
 
-`strip("abc")` повинне повернути рядок.
+`strip("abc")` має повернути рядок.
 
 ```js
 assert(typeof strip('abc') == 'string');
 ```
 
-`strip("\ba\x00b\n\rc\fd\xc3")` має повернути`"abcd"`.
+`strip("\ba\x00b\n\rc\fd\xc3")` має повернути `"abcd"`.
 
 ```js
 assert.equal(strip('\ba\x00b\n\rc\fd\xc3'), 'abcd');
 ```
 
-`strip("\u0000\n abc\u00E9def\u007F")`має повернути`" abcdef"`.
+`strip("\u0000\n abc\u00E9def\u007F")` має повернути `" abcdef"`.
 
 ```js
 assert.equal(strip('\u0000\n abc\u00E9def\u007F'), ' abcdef');
 ```
 
-`strip("a\n\tb\u2102d\u2147f")` має повернути`"abdf"`.
+`strip("a\n\tb\u2102d\u2147f")` має повернути `"abdf"`.
 
 ```js
 assert.equal(strip('a\n\tb\u2102d\u2147f'), 'abdf');
 ```
 
-`strip("Français.")` має повернути`"Franais."`.
+`strip("Français.")` має повернути `"Franais."`.
 
 ```js
 assert.equal(strip('Français.'), 'Franais.');
 ```
 
-`strip("123\tabc\u0007DEF\u007F+-*/€æŧðłþ")` має повернути`"123abcDEF+-*/"`.
+`strip("123\tabc\u0007DEF\u007F+-*/€æŧðłþ")` має повернути `"123abcDEF+-*/"`.
 
 ```js
 assert.equal(strip('123\tabc\u0007DEF\u007F+-*/€æŧðłþ'), '123abcDEF+-*/');
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/subleq.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/subleq.md
index e4bd7ed555e..361f911bc4e 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/subleq.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/subleq.md
@@ -8,34 +8,34 @@ dashedName: subleq
 
 # --description--
 
-Subleq is an example of a One-Instruction Set Computer (OISC).
+Subleq є прикладом комп’ютера з одним набором команд.
 
-Назва пішла від перших літер інструкції: **SU**btract і **B**ranch if **L**ess than or **EQ**ual to zero (відняти й перейти, якщо результат менший або рівний нулю).
+Сама назва походить від єдиної команди: **SU**btract and **B**ranch if **L**ess than or **EQ**ual to zero (укр. відняти і перейти, якщо результат менший або дорівнює нулю).
 
-Ваше завдання — створити дешифрувальник, який змоделює принцип дії такої машини.
+Ваше завдання — створити інтерпретатор, який емулює таку машину.
 
-Пам'ять машини складається з масиву цілих чисел зі знаком. Підійде будь-який допустимий розмір слова, але пам'ять повинна підтримувати від'ємні та додатні числа.
+Пам’ять машини складається з масиву цілих чисел зі знаком. Підходить будь-який розмір слова, але пам’ять має зберігати як від’ємні, так і додатні числа.
 
-Виконання починається з лічильника команд, спрямованого на перше слово, яке є адресою 0. Це відбувається наступним чином:
+Виконання починається з покажчика команд, спрямованого на перше слово, яке має адресу 0. Воно відбувається наступним чином:
 
 <ol>
-  <li>Let A, B, and C be the value stored in the three consecutive words in memory starting at the instruction pointer.</li>
-  <li>Розширте лічильник команд, розташувавши курсор у адресному рядку після компонента, що містить значення C.</li>
-  <li>Якщо A = -1, тоді символ зчитується зі стандартного вводу та його кодова точка, що зберігається в адресі, зазначеному у B. C не використовується.</li>
-  <li>Якщо B — -1, тоді число, що міститься в адресі, вказаній А, інтерпретується як кодова точка та відповідний символ виходу. C знову не використовується.</li>
-  <li>В іншому випадку і A, і B розглядаються як адреси комірок пам'яті. Число, що знаходиться в адресі, що вказана A, віднімається від числа в адресі, вказаній B (а результат зберігається назад в адрес B). Якщо результат дорівнює нулю або від'ємний, значення C стає новим лічильником команд.</li>
-  <li>Якщо лічильник команд стає від'ємним — виконання припиняється.</li>
+  <li>Нехай A, B та C будуть значеннями, збереженими в трьох послідовних словах в пам’яті, починаючи з покажчика команд.</li>
+  <li>Перемістіть покажчик команд на 3 слова, щоб він вказував на адресу після тієї, що містить C.</li>
+  <li>Якщо A дорівнює -1, то зі стандартного вводу зчитується символ, а його кодова точка зберігається за адресою, вказаною B. C не використовується.</li>
+  <li>Якщо B дорівнює -1, то число, яке міститься за адресою, вказаною A, інтерпретується як кодова точка, і виводиться відповідний символ. C знову не використовується.</li>
+  <li>В іншому випадку A та B розглядаються як адреси місць в пам’яті. Число, яке міститься за адресою, вказаною A, віднімається від числа за адресою, вказаною B (а результат зберігається за адресою B). Якщо результат дорівнює нулю або є від’ємним, то значення C стає новим покажчиком команд.</li>
+  <li>Якщо покажчик команд стає від’ємним, то виконання зупиняється.</li>
 </ol>
 
-Інші негативні адреси, окрім -1, можна вважати еквівалентом -1 або згенерувати помилку — робіть так, як вважаєте за потрібне.
+Інші від’ємні адреси (окрім -1) можна розглядати як еквівалентні -1 або викликати помилку, якщо це доцільно.
 
-Ваше рішення повинно показати, чи надаєте Ви дозвіл програмі виконати дану операцію в комп'ютері незалежно від вхідного потоку самої програми.
+Ваш розв’язок має приймати програму для виконання на машині окремо від вводу, який надається програмі самостійно.
 
-Ця програма має бути в сирому "машинному коді" subleq — десяткові числа, розділені пробілом з символьним ім'ям чи інші розширення рівня асемблера, які завантажаться у пам'ять, починаючи з адреси 0. Покажіть вивід свого рішення, коли запустите цю програму "Hello, world!". (Зверніть увагу, що цей приклад припускає використання ASCII або його надмножину, таку як будь-який сет символів чи Unicode. Ви можете перекласти його на іншу кодову систему, якщо ваше виконання засноване на середовищі, не сумісному з ASCIL.)
+Ця програма має бути в звичайному машинному коді subleq: десяткові числа, розділені пропусками, без символьних назв або інших розширень на рівні мови асемблера, які будуть завантажені в пам’ять, починаючи з адреси 0. Покажіть вивід свого розв’язку, коли виконується "Hello, world!". (Зауважте, що цей приклад передбачає ASCII або його надмножину, наприклад, будь-який з наборів символів Latin-N або Unicode. Ви можете перекласти його на інший набір символів, якщо ваша реалізація виконується в несумісному з ASCII середовищі.)
 
 <pre>15 17 -1 17 -1 -1 16 1 -1 16 3 -1 15 15 0 0 -1 72 101 108 108 111 44 32 119 111 114 108 100 33 10 0</pre>
 
-Що відповідає чомусь схожому на це у гіпотетичній мові асемблера:
+Що в гіпотетичній мові асемблера відповідає чомусь подібному:
 
 <pre>start:
     zero, message, -1
@@ -50,7 +50,7 @@ message: "Hello, world!\n\0"
 
 # --instructions--
 
-Напишіть функцію, що використовує набір цілих чисел як параметр. Це відображає елементи пам'яті. Функція повинна інтерпретувати послідовність та виводити вихідний рядок. Для цього завдання припустимо, що стандартного вводу немає.
+Напишіть функцію, яка приймає масив цілих чисел як параметр. Це представляє елементи пам’яті. Функція має інтерпретувати послідовність та повернути вихідний рядок. Для цього завдання припустимо, що стандартного вводу немає.
 
 # --hints--
 
@@ -60,7 +60,7 @@ message: "Hello, world!\n\0"
 assert(typeof Subleq == 'function');
 ```
 
-`Subleq([15, 17, -1, 17, -1, -1, 16, 1, -1, 16, 3, -1, 15, 15, 0, 0, -1, 72, 101, 108, 108, 111, 44, 32, 119, 111, 114, 108, 100, 33, 0])` має виводити рядок.
+`Subleq([15, 17, -1, 17, -1, -1, 16, 1, -1, 16, 3, -1, 15, 15, 0, 0, -1, 72, 101, 108, 108, 111, 44, 32, 119, 111, 114, 108, 100, 33, 0])` має повернути рядок.
 
 ```js
 assert(
@@ -100,7 +100,7 @@ assert(
 );
 ```
 
-`Subleq([15, 17, -1, 17, -1, -1, 16, 1, -1, 16, 3, -1, 15, 15, 0, 0, -1, 72, 101, 108, 108, 111, 44, 32, 119, 111, 114, 108, 100, 33, 0])` має відображати `"Hello, world!"`.
+`Subleq([15, 17, -1, 17, -1, -1, 16, 1, -1, 16, 3, -1, 15, 15, 0, 0, -1, 72, 101, 108, 108, 111, 44, 32, 119, 111, 114, 108, 100, 33, 0])` має повернути `"Hello, world!"`.
 
 ```js
 assert.equal(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sudoku.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sudoku.md
index 29e31c36db3..873c633066d 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sudoku.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sudoku.md
@@ -8,7 +8,7 @@ dashedName: sudoku
 
 # --description--
 
-Write a function to solve a partially filled-in normal 9x9 Sudoku grid and return the result. The blank fields are represented by `-1`.
+Напишіть функцію, щоб розв’язати частково заповнене поле 9×9 та повернути результат. Порожні поля представлені як `-1`.
 
 # --hints--
 
@@ -38,7 +38,7 @@ assert(
 );
 ```
 
-`вирішитиСудоку([[8, 1, 9, -1, -1, 5, -1, -1, -1],[-1, -1, 2, -1, -1, -1, 7, 5, -1],[-1, 3, 7, 1, -1, 4, -1, 6, -1],[4, -1, -1, 5, 9, -1, 1, -1, -1],[7, -1, -1, 3, -1, 8, -1, -1, 2],[-1, -1, 3, -1, 6, 2, -1, -1, 7],[-1, 5, -1, 7, -1, 9, 2, 1, -1],[-1, 6, 4, -1, -1, -1, 9, -1, -1],[-1, -1, -1, 2, -1, -1, 4, 3, 8]])` має повернути `[[8, 1, 9, 6, 7, 5, 3, 2, 4],[6, 4, 2, 9, 8, 3, 7, 5, 1],[5, 3, 7, 1, 2, 4, 8, 6, 9],[4, 2, 6, 5, 9, 7, 1, 8, 3],[7, 9, 5, 3, 1, 8, 6, 4, 2],[1, 8, 3, 4, 6, 2, 5, 9, 7],[3, 5, 8, 7, 4, 9, 2, 1, 6],[2, 6, 4, 8, 3, 1, 9, 7, 5],[9, 7, 1, 2, 5, 6, 4, 3, 8]]`.
+`solveSudoku([[8, 1, 9, -1, -1, 5, -1, -1, -1],[-1, -1, 2, -1, -1, -1, 7, 5, -1],[-1, 3, 7, 1, -1, 4, -1, 6, -1],[4, -1, -1, 5, 9, -1, 1, -1, -1],[7, -1, -1, 3, -1, 8, -1, -1, 2],[-1, -1, 3, -1, 6, 2, -1, -1, 7],[-1, 5, -1, 7, -1, 9, 2, 1, -1],[-1, 6, 4, -1, -1, -1, 9, -1, -1],[-1, -1, -1, 2, -1, -1, 4, 3, 8]])` має повернути `[[8, 1, 9, 6, 7, 5, 3, 2, 4],[6, 4, 2, 9, 8, 3, 7, 5, 1],[5, 3, 7, 1, 2, 4, 8, 6, 9],[4, 2, 6, 5, 9, 7, 1, 8, 3],[7, 9, 5, 3, 1, 8, 6, 4, 2],[1, 8, 3, 4, 6, 2, 5, 9, 7],[3, 5, 8, 7, 4, 9, 2, 1, 6],[2, 6, 4, 8, 3, 1, 9, 7, 5],[9, 7, 1, 2, 5, 6, 4, 3, 8]]`.
 
 ```js
 assert.deepEqual(
@@ -67,7 +67,7 @@ assert.deepEqual(
 );
 ```
 
-`вирішитиСудоку([[5, 3, -1, -1, 2, 4, 7, -1, -1],[-1, -1, 2, -1, -1, -1, 8, -1, -1],[1, -1, -1, 7, -1, 3, 9, -1, 2],[-1, -1, 8, -1, 7, 2, -1, 4, 9],[-1, 2, -1, 9, 8, -1, -1, 7, -1],[7, 9, -1, -1, -1, -1, -1, 8, -1],[-1, -1, -1, -1, 3, -1, 5, -1, 6],[9, 6, -1, -1, 1, -1, 3, -1, -1],[-1, 5, -1, 6, 9, -1, -1, 1, -1]])` має повернути `[[5, 3, 9, 8, 2, 4, 7, 6, 1],[6, 7, 2, 1, 5, 9, 8, 3, 4],[1, 8, 4, 7, 6, 3, 9, 5, 2],[3, 1, 8, 5, 7, 2, 6, 4, 9],[4, 2, 5, 9, 8, 6, 1, 7, 3],[7, 9, 6, 3, 4, 1, 2, 8, 5],[8, 4, 1, 2, 3, 7, 5, 9, 6],[9, 6, 7, 4, 1, 5, 3, 2, 8],[2, 5, 3, 6, 9, 8, 4, 1, 7]]`.
+`solveSudoku([[5, 3, -1, -1, 2, 4, 7, -1, -1],[-1, -1, 2, -1, -1, -1, 8, -1, -1],[1, -1, -1, 7, -1, 3, 9, -1, 2],[-1, -1, 8, -1, 7, 2, -1, 4, 9],[-1, 2, -1, 9, 8, -1, -1, 7, -1],[7, 9, -1, -1, -1, -1, -1, 8, -1],[-1, -1, -1, -1, 3, -1, 5, -1, 6],[9, 6, -1, -1, 1, -1, 3, -1, -1],[-1, 5, -1, 6, 9, -1, -1, 1, -1]])` має повернути `[[5, 3, 9, 8, 2, 4, 7, 6, 1],[6, 7, 2, 1, 5, 9, 8, 3, 4],[1, 8, 4, 7, 6, 3, 9, 5, 2],[3, 1, 8, 5, 7, 2, 6, 4, 9],[4, 2, 5, 9, 8, 6, 1, 7, 3],[7, 9, 6, 3, 4, 1, 2, 8, 5],[8, 4, 1, 2, 3, 7, 5, 9, 6],[9, 6, 7, 4, 1, 5, 3, 2, 8],[2, 5, 3, 6, 9, 8, 4, 1, 7]]`.
 
 ```js
 assert.deepEqual(
@@ -96,7 +96,7 @@ assert.deepEqual(
 );
 ```
 
-`solveSudoku([[-1, -1, 3, -1, 2, -1, 6, -1, -1],[9, -1, -1, 3, -1, 5, -1, -1, 1],[-1, -1, 1, 8, -1, 6, 4, -1, -1],[-1, -1, 8, 1, -1, 2, 9, -1, -1],[7, -1, -1, -1, -1, -1, -1, -1, 8],[-1, -1, 6, 7, -1, 8, 2, -1, -1],[-1, -1, 2, 6, -1, 9, 5, -1, -1],[8, -1, -1, 2, -1, 3, -1, -1, 9],[-1, -1, 5, -1, 1, -1, 3, -1, -1]])` має повернути`[[4, 8, 3, 9, 2, 1, 6, 5, 7],[9, 6, 7, 3, 4, 5, 8, 2, 1],[2, 5, 1, 8, 7, 6, 4, 9, 3],[5, 4, 8, 1, 3, 2, 9, 7, 6],[7, 2, 9, 5, 6, 4, 1, 3, 8],[1, 3, 6, 7, 9, 8, 2, 4, 5],[3, 7, 2, 6, 8, 9, 5, 1, 4],[8, 1, 4, 2, 5, 3, 7, 6, 9],[6, 9, 5, 4, 1, 7, 3, 8, 2]]`.
+`solveSudoku([[-1, -1, 3, -1, 2, -1, 6, -1, -1],[9, -1, -1, 3, -1, 5, -1, -1, 1],[-1, -1, 1, 8, -1, 6, 4, -1, -1],[-1, -1, 8, 1, -1, 2, 9, -1, -1],[7, -1, -1, -1, -1, -1, -1, -1, 8],[-1, -1, 6, 7, -1, 8, 2, -1, -1],[-1, -1, 2, 6, -1, 9, 5, -1, -1],[8, -1, -1, 2, -1, 3, -1, -1, 9],[-1, -1, 5, -1, 1, -1, 3, -1, -1]])` має повернути `[[4, 8, 3, 9, 2, 1, 6, 5, 7],[9, 6, 7, 3, 4, 5, 8, 2, 1],[2, 5, 1, 8, 7, 6, 4, 9, 3],[5, 4, 8, 1, 3, 2, 9, 7, 6],[7, 2, 9, 5, 6, 4, 1, 3, 8],[1, 3, 6, 7, 9, 8, 2, 4, 5],[3, 7, 2, 6, 8, 9, 5, 1, 4],[8, 1, 4, 2, 5, 3, 7, 6, 9],[6, 9, 5, 4, 1, 7, 3, 8, 2]]`.
 
 ```js
 assert.deepEqual(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-digits-of-an-integer.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-digits-of-an-integer.md
index c9eb6c5d1a5..93ae7dc2be8 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-digits-of-an-integer.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-digits-of-an-integer.md
@@ -8,7 +8,7 @@ dashedName: sum-digits-of-an-integer
 
 # --description--
 
-Write a function that takes a string as a parameter. This string represents a number that can be in any base (less than 37) and return the sum of its digits.
+Напишіть функцію, яка приймає рядок як параметр. Цей рядок представляє число за будь-якою основою (меншою за 37) та повертає суму його цифр.
 
 <ul>
   <li><b>1</b><sub>10</sub> сумується як <b>1</b></li>
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-multiples-of-3-and-5.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-multiples-of-3-and-5.md
index 209416064bd..25592924b14 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-multiples-of-3-and-5.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-multiples-of-3-and-5.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8040
-title: Додайте числа, кратні 3 і 5
+title: Сума кратних чисел 3 та 5
 challengeType: 1
 forumTopicId: 302332
 dashedName: sum-multiples-of-3-and-5
@@ -8,7 +8,7 @@ dashedName: sum-multiples-of-3-and-5
 
 # --description--
 
-The objective is to write a function that finds the sum of all positive multiples of 3 or 5 below *n*.
+Потрібно написати функцію, яка знаходить суму всіх додатних кратних чисел 3 та 5, які менші за *n*.
 
 # --hints--
 
@@ -24,31 +24,31 @@ assert(typeof sumMults == 'function');
 assert(typeof sumMults(10) == 'number');
 ```
 
-`sumMults(10)` має повернути`23`.
+`sumMults(10)` має повернути `23`.
 
 ```js
 assert.equal(sumMults(10), 23);
 ```
 
-`sumMults(100)` має повернути`2318`.
+`sumMults(100)` має повернути `2318`.
 
 ```js
 assert.equal(sumMults(100), 2318);
 ```
 
-`sumMults(1000)` має повернути`233168`.
+`sumMults(1000)` має повернути `233168`.
 
 ```js
 assert.equal(sumMults(1000), 233168);
 ```
 
-`sumMults(10000)` має повернути`23331668`.
+`sumMults(10000)` має повернути `23331668`.
 
 ```js
 assert.equal(sumMults(10000), 23331668);
 ```
 
-`sumMults(100000)` має повернути`2333316668`.
+`sumMults(100000)` має повернути `2333316668`.
 
 ```js
 assert.equal(sumMults(100000), 2333316668);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-of-a-series.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-of-a-series.md
index 63deaf984ce..9488c7bba32 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-of-a-series.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-of-a-series.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8041
-title: Сума послідовності
+title: Сума множини
 challengeType: 1
 forumTopicId: 302333
 dashedName: sum-of-a-series
@@ -8,11 +8,11 @@ dashedName: sum-of-a-series
 
 # --description--
 
-Compute the **n**<sup>th</sup> term of a <em>series</em>, i.e. the sum of the **n** first terms of the corresponding <em>sequence</em>. Informally this value, or its limit when **n** tends to infinity, is also called the *sum of the series*, thus the title of this task. For this task, use: $S_n = \displaystyle\sum_{k=1}^n \frac{1}{k^2}$.
+Обчисліть **n**<sup>-ий</sup> член <em>множини</em>, тобто суму перших **n** членів відповідної <em>послідовності</em>. Неформально таке значення (або його обмеження, коли **n** прагне до нескінченності) називають *сумою множин*, звідси й назва завдання. Для цього завдання використайте: $S_n = \displaystyle\sum_{k=1}^n \frac{1}{k^2}$.
 
 # --instructions--
 
-Напишіть функцію, у якій $a$ та $b$ будуть параметрами, і яка поверне суму членів послідовності від $a^{th}$ до $b^{th}$.
+Напишіть функцію, яка приймає $a$ та $b$ як параметри і повертає суму членів послідовності від $a$ до $b$.
 
 # --hints--
 
@@ -28,31 +28,31 @@ assert(typeof sum == 'function');
 assert(typeof sum(1, 100) == 'number');
 ```
 
-`sum(1, 100)` має повернути`1.6349839001848923`.
+`sum(1, 100)` має повернути `1.6349839001848923`.
 
 ```js
 assert.equal(sum(1, 100), 1.6349839001848923);
 ```
 
-`sum(33, 46)` має повернути`0.009262256361481223`.
+`sum(33, 46)` має повернути `0.009262256361481223`.
 
 ```js
 assert.equal(sum(33, 46), 0.009262256361481223);
 ```
 
-`sum(21, 213)` має повернути`0.044086990748706555`.
+`sum(21, 213)` має повернути `0.044086990748706555`.
 
 ```js
 assert.equal(sum(21, 213), 0.044086990748706555);
 ```
 
-`sum(11, 111)` має повернути`0.08619778593108679`.
+`sum(11, 111)` має повернути `0.08619778593108679`.
 
 ```js
 assert.equal(sum(11, 111), 0.08619778593108679);
 ```
 
-`sum(1, 10)` має повернути`1.5497677311665408`.
+`sum(1, 10)` має повернути `1.5497677311665408`.
 
 ```js
 assert.equal(sum(1, 10), 1.5497677311665408);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-of-squares.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-of-squares.md
index 3841485ee30..9f408cd036d 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-of-squares.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-of-squares.md
@@ -8,7 +8,7 @@ dashedName: sum-of-squares
 
 # --description--
 
-Write a function to find the sum of squares of an array of integers.
+Напишіть функцію, щоб знайти суму квадратів в масиві цілих чисел.
 
 # --hints--
 
@@ -42,7 +42,7 @@ assert.equal(sumsq([25, 32, 12, 7, 20]), 2242);
 assert.equal(sumsq([38, 45, 35, 8, 13]), 4927);
 ```
 
-`sumsq([43, 36, 20, 34, 24])`має повернути `5277`.
+`sumsq([43, 36, 20, 34, 24])` має повернути `5277`.
 
 ```js
 assert.equal(sumsq([43, 36, 20, 34, 24]), 5277);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-to-100.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-to-100.md
index ccfa8262abe..8fc17059c81 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-to-100.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sum-to-100.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8043
-title: Сума до 100
+title: Сума 100
 challengeType: 1
 forumTopicId: 302335
 dashedName: sum-to-100
@@ -8,9 +8,9 @@ dashedName: sum-to-100
 
 # --description--
 
-Find solutions to the *sum to one hundred* puzzle.
+Знайдіть розв’язки до головоломки *«Сума 100»*.
 
-Додайте (вставте) математичні оператори **+** чи **─** (плюс або мінус) перед будь-якою цифрою в десятковому числовому рядку **123456789** так, щоб отриманий математичний вираз у підсумку дорівнював певній сумі (у цьому знаковому випадку — **100**).
+Додайте (вставте) математичні оператори **+** або **─** (плюс або мінус) перед будь-якою цифрою в десятковому числовому рядку **123456789**, щоб отриманий математичний вираз дорівнював певній сумі (в цьому випадку **100**).
 
 Наприклад:
 
@@ -18,7 +18,7 @@ Find solutions to the *sum to one hundred* puzzle.
 
 # --instructions--
 
-Напишіть функцію, яка враховує число як параметр. Ця функція має повернути масив, що вміщуватиме всі рішення для даного числа. Рішення має бути рядками у вигляді виразів. Наприклад: "1+23-456+78-9". Відсортуйте масив до того, як повернете його.
+Напишіть функцію, яка приймає число як параметр. Ця функція має повернути масив, який містить всі розв’язки для даного числа. Розв’язками мають бути рядки у вигляді виразів. Наприклад, "1+23-456+78-9". Відсортуйте масив, перш ніж повернути його.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sutherland-hodgman-polygon-clipping.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sutherland-hodgman-polygon-clipping.md
index 17e14bb8373..b2a4763d14a 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sutherland-hodgman-polygon-clipping.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/sutherland-hodgman-polygon-clipping.md
@@ -1,6 +1,6 @@
 ---
 id: 5a23c84252665b21eecc8045
-title: Відсікання багатокутників алгоритмом Сазерленд-Ходжман
+title: Відсікання багатокутників Сазерленда-Ходжмана
 challengeType: 1
 forumTopicId: 302336
 dashedName: sutherland-hodgman-polygon-clipping
@@ -8,17 +8,17 @@ dashedName: sutherland-hodgman-polygon-clipping
 
 # --description--
 
-The Sutherland-Hodgman clipping algorithm finds the polygon that is the intersection between an arbitrary polygon (the "subject polygon") and a convex polygon (the "clip polygon"). It is used in computer graphics (especially 2D graphics) to reduce the complexity of a scene being displayed by eliminating parts of a polygon that do not need to be displayed. Take the closed polygon defined by the points:
+Алгоритм відсікання Сазерленда-Ходжмана знаходить багатокутник, який є перетином між довільним багатокутником («вихідний багатокутник») та опуклим багатокутником («обмежуючий багатокутник»). Його використовують в комп’ютерній графіці (особливо 2D-графіці), щоб зменшити складність сцени, яка відтворюється, за допомогою вилучення частин багатокутника, які не потрібно відтворювати. Візьмемо замкнений багатокутник, визначений точками:
 
 <pre>[(50, 150), (200, 50), (350, 150), (350, 300), (250, 300), (200, 250), (150, 350), (100, 250), (100, 200)]</pre>
 
-і обріжте його за допомогою прямокутника, визначеного точками:
+і відсічемо його прямокутником, визначеним точками:
 
 <pre>[(100, 100), (300, 100), (300, 300), (100, 300)]</pre>
 
 # --instructions--
 
-Напишіть функцію, яка приймає два масиви як параметри. Перший масив вміщує у собі точки багатокутника-суб'єкта, а другий містить точки багатокутника, що відсікається. Функція має повернути масив, який вміщує точки відсіченого багатокутника. Кожне число має бути округлене до 3-х десяткових знаків після коми.
+Напишіть функцію, яка приймає два масиви як параметри. Перший масив містить точки вихідного багатокутника, а другий масив містить точки обмежуючого багатокутника. Функція має повернути масив, який містить точки відсіченого багатокутника. Заокругліть кожне число до трьох знаків після коми.
 
 # --hints--
 
@@ -120,7 +120,7 @@ assert.deepEqual(
 );
 ```
 
-`clip([[250, 200], [100, 450], [130, 250]], [[50, 60], [100, 230], [400, 600], [100, 300]])`має повернути`[[129.167, 329.167], [119.565, 319.565], [121.854, 304.305]]`.
+`clip([[250, 200], [100, 450], [130, 250]], [[50, 60], [100, 230], [400, 600], [100, 300]])` має повернути `[[129.167, 329.167], [119.565, 319.565], [121.854, 304.305]]`.
 
 ```js
 assert.deepEqual(
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/symmetric-difference.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/symmetric-difference.md
index b0033f8960d..80e460dfd13 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/symmetric-difference.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/symmetric-difference.md
@@ -8,15 +8,15 @@ dashedName: symmetric-difference
 
 # --description--
 
-Given two sets *A* and *B*, compute $(A \\setminus B) \\cup (B \\setminus A).$ That is, enumerate the items that are in *A* or *B* but not both. This set is called the symmetric difference of *A* and *B*. In other words: $(A \\cup B) \\setminus (A \\cap B)$ (the set of items that are in at least one of *A* or *B* minus the set of items that are in both *A* and *B*).
+Дано дві множини: *A* та *B*. Обчисліть $(A \\setminus B) \\cup (B \\setminus A).$ Тобто перерахуйте предмети, які розташовані або в *A*, або в *B*, але не в обох одночасно. Ця множина називається симетричною різницею множин *A* та *B*. Іншими словами: $(A \\cup B) \\setminus (A \\cap B)$ (множина предметів, які знаходяться в *A* або *B*, мінус множина предметів, які знаходяться в *A* та *B*).
 
 Наприклад:
 
-Для множин `A = [1, 2, 3]` та `B = [1, 3, 4]` симетрична різниця *A* та *B* є `[2, 4]`.
+Для множин `A = [1, 2, 3]` та `B = [1, 3, 4]` симетричною різницею множин *A* та *B* є `[2, 4]`.
 
 # --instructions--
 
-Створіть функцію, яка приймає два масиви як параметри та повертає симетричну різницю. Відсортуйте отриманий масив перед поверненням.
+Напишіть функцію, яка приймає два масиви як параметри та повертає симетричну різницю. Відсортуйте отриманий масив, перш ніж повернути його.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/taxicab-numbers.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/taxicab-numbers.md
index df094c1467f..e481ac8d1e1 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/taxicab-numbers.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/taxicab-numbers.md
@@ -1,6 +1,6 @@
 ---
 id: 594ecc0d9a8cf816e3340187
-title: Числа Taxicab
+title: Числа таксі
 challengeType: 1
 forumTopicId: 302337
 dashedName: taxicab-numbers
@@ -8,15 +8,15 @@ dashedName: taxicab-numbers
 
 # --description--
 
-A taxicab number (the definition that is being used here) is a positive integer that can be expressed as the sum of two positive cubes in more than one way.
+Число таксі (визначення, яке використовується тут) — це натуральне число, яке можна виразити як суму двох кубів додатних чисел декількома способами.
 
-Першим n-им числом Харді–Рамануджана є `1729`, який є:
+Першим числом таксі є `1729`:
 
-1<sup>3</sup> + 12<sup>3</sup> і
+1<sup>3</sup> + 12<sup>3</sup> та
 
 9<sup>3</sup> + 10<sup>3</sup>.
 
-Дані числа також відомі як:
+Англійською мовою числа таксі також відомі як:
 
 <ul>
   <li>taxi numbers</li>
@@ -27,7 +27,7 @@ A taxicab number (the definition that is being used here) is a positive integer
 
 # --instructions--
 
-Напишіть функцію, що повертає `n`-найменші числа taxicab. Для кожного даного числа покажіть також і число включаючи його складові в третьому ступені.
+Напишіть функцію, яка повертає `n` найменших чисел таксі. Для кожного з чисел таксі вкажіть число і куби, з яких воно складається.
 
 # --hints--
 
@@ -49,19 +49,19 @@ assert(typeof taxicabNumbers(2) === 'object');
 assert(typeof taxicabNumbers(100)[0] === 'number');
 ```
 
-`taxicabNumbers(4)` має повернути [1729, 4104, 13832, 20683].
+`taxicabNumbers(4)` має повернути `[1729, 4104, 13832, 20683]`.
 
 ```js
 assert.deepEqual(taxicabNumbers(4), res4);
 ```
 
-`taxicabNumbers(25)` має повернути [1729, 4104, 13832, 20683, 32832, 39312, 40033, 46683, 64232, 65728, 110656, 110808, 134379, 149389, 165464, 171288, 195841, 216027, 216125, 262656, 314496, 320264, 327763, 373464, 402597]
+`taxicabNumbers(25)` має повернути `[1729, 4104, 13832, 20683, 32832, 39312, 40033, 46683, 64232, 65728, 110656, 110808, 134379, 149389, 165464, 171288, 195841, 216027, 216125, 262656, 314496, 320264, 327763, 373464, 402597]`.
 
 ```js
 assert.deepEqual(taxicabNumbers(25), res25);
 ```
 
-`taxicabNumbers(39)` отриманими числами від 20 до 29 мають бути [314496,320264,327763,373464,402597,439101,443889,513000,513856].
+Вихідними числами `taxicabNumbers(39)` від 20 до 29 мають бути `[314496,320264,327763,373464,402597,439101,443889,513000,513856]`.
 
 ```js
 assert.deepEqual(taxicabNumbers(39).slice(20, 29), res39From20To29);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/tokenize-a-string-with-escaping.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/tokenize-a-string-with-escaping.md
index 6c1a774d8f4..9824c6a744f 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/tokenize-a-string-with-escaping.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/tokenize-a-string-with-escaping.md
@@ -1,6 +1,6 @@
 ---
 id: 594faaab4e2a8626833e9c3d
-title: Розбиття рядка на лексеми методом екранування
+title: Tokenize a string with escaping
 challengeType: 1
 forumTopicId: 302338
 dashedName: tokenize-a-string-with-escaping
@@ -10,7 +10,7 @@ dashedName: tokenize-a-string-with-escaping
 
 Write a function or program that can split a string at each non-escaped occurrence of a separator character.
 
-Вона має містити три вхідні параметри:
+Вона має приймати три вхідні параметри:
 
 <ul>
   <li><strong>рядок</strong></li>
@@ -27,21 +27,21 @@ Write a function or program that can split a string at each non-escaped occurren
   <li>Порожні поля мають зберегтись, навіть спочатку та вкінці.</li>
 </ul>
 
-Правила для екранування:
+Правила для переходу:
 
 <ul>
   <li>"Escaped" means preceded by an occurrence of the escape character that is not already escaped itself.</li>
-  <li>Якщо escape-символ передує символу, що немає спеціального значення, то він все ще вважається екранованим (але не робить нічого особливого).</li>
-  <li>Кожна поява escape-символу, який використовувався для екранування чогось, не повинна стати частиною виводу.</li>
+  <li>When the escape character precedes a character that has no special meaning, it still counts as an escape (but does not do anything special).</li>
+  <li>Each occurrences of the escape character that was used to escape something, should not become part of the output.</li>
 </ul>
 
-Доведіть, що ваша функція задовольняє наступний тестовий приклад:
+Доведемо, що функція задовольняє такий випадок:
 
 Дано рядок
 
 <pre>one^|uno||three^^^^|four^^^|^cuatro|</pre>
 
-і використовуючи `|`як розділювач і `^` як escape-символ, ваша функція має вивести наступний масив:
+використовуючи `|` як відокремлювальний символ та `^` як символ переходу, функція має вивести наступний масив:
 
 <pre>  ['one|uno', '', 'three^^', 'four^|cuatro', '']
 </pre>
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/top-rank-per-group.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/top-rank-per-group.md
index 999fd226e55..c71fd23549b 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/top-rank-per-group.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/top-rank-per-group.md
@@ -1,6 +1,6 @@
 ---
 id: 595011cba5a81735713873bd
-title: Найкращий на групу
+title: Найкращі показники групи
 challengeType: 1
 forumTopicId: 302339
 dashedName: top-rank-per-group
@@ -8,9 +8,9 @@ dashedName: top-rank-per-group
 
 # --description--
 
-Find the top `n` ranked data in each group, where `n` is provided as a parameter. Name of the rank and the group are also provided as parameter.
+Знайдіть `n` найкращих об’єктів в кожній групі, де `n` надано як параметр. Назву групи також надано як параметр.
 
-За наведеними нижче даними:
+Дано наступні дані:
 
 ```js
 testData1 = [
@@ -30,13 +30,13 @@ testData1 = [
 ];
 ```
 
-Перші топ 10 працівників кожного відділення можуть бути виставлені в рейтинг таким чином:
+Щоб знайти десять найкращих працівників з кожного відділення, викличте:
 
 ```js
 topRankPerGroup(10, testData1, 'dept', 'salary')
 ```
 
-За наведеними нижче даними:
+Дано наступні дані:
 
 ```js
 testData2 = [
@@ -48,15 +48,15 @@ testData2 = [
 ];
 ```
 
-Можна ранжувати фільми з найвищими рейтингами за жанром таким чином:
+Щоб знайти найкращі фільми кожного жанру, викличте:
 
 ```js
 topRankPerGroup(1, testData2, 'genre', 'rating')
 ```
 
-Функція має повернути масив з окремим масивом для кожної групи, що матимуть топ `n` об'єкти.
+Функція має повернути масив з окремим масивом для кожної категорії, що містить `n` найкращих об’єктів.
 
-Наприклад, за такими даними:
+Наприклад, дано такі дані:
 
 ```js
 [
@@ -69,7 +69,7 @@ topRankPerGroup(1, testData2, 'genre', 'rating')
 ];
 ```
 
-Два найкращі працівники за показником зарплати були б:
+Двома працівниками з кожного відділення з найбільшою зарплатнею будуть:
 
 ```js
 [ [ { name: 'Kim Arlich', id: 'E10001', salary: 57000, dept: 'D050' },
@@ -86,13 +86,13 @@ topRankPerGroup(1, testData2, 'genre', 'rating')
 assert(typeof topRankPerGroup === 'function');
 ```
 
-`topRankPerGroup` має повернути невизначені або від'ємні значення n.
+`topRankPerGroup` має повернути `undefined`, якщо значення n від’ємне.
 
 ```js
 assert(typeof topRankPerGroup(-1, []) === 'undefined');
 ```
 
-Для `topRankPerGroup(10, testData1, 'dept', 'salary')`, першим результатом у першій групі має бути `{ name: 'John Rappl', id: 'E21437', salary: 47000, dept: 'D050'}`.
+Для `topRankPerGroup(10, testData1, 'dept', 'salary')`, першим результатом в першій групі має бути `{ name: 'John Rappl', id: 'E21437', salary: 47000, dept: 'D050'}`.
 
 ```js
 assert.deepEqual(res1[0][0], { name: 'John Rappl', id: 'E21437', salary: 47000, dept: 'D050'});
@@ -104,13 +104,13 @@ assert.deepEqual(res1[0][0], { name: 'John Rappl', id: 'E21437', salary: 47000,
 assert.deepEqual(res1[3][3], { name: 'Adam Smith', id: 'E63535', salary: 18000, dept: 'D202' });
 ```
 
-`topRankPerGroup(1, ...)` має повернути лише найвищий результат із групи.
+`topRankPerGroup(1, ...)` має повернути лише найкращий результат для кожної групи.
 
 ```js
 assert.equal(res2[2].length, 1);
 ```
 
-`topRankPerGroup(2, ...)` має повернути два найкращих результати з групи.
+`topRankPerGroup(2, ...)` має повернути два найкращих результати для кожної групи.
 
 ```js
 assert.equal(res3[2][1].name, 'Maze Runner');
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/towers-of-hanoi.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/towers-of-hanoi.md
index cb7c6a73382..ecee30bad77 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/towers-of-hanoi.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/towers-of-hanoi.md
@@ -8,13 +8,13 @@ dashedName: towers-of-hanoi
 
 # --description--
 
-Solve the Towers of Hanoi problem. The number of objects will be given as the first parameter, followed by the strings used to identify each stack of objects. Create a nested array containing the list of moves, `["source", "destination"]`.
+Розв’яжіть задачу Ханойської вежі. Кількість об’єктів буде надано як перший об’єкт, а потім буде надано рядки, які використовуються для ідентифікації кожного набору об’єктів. Створіть вкладений масив, який міститиме множину кроків: `["джерело", "призначення"]`.
 
-Наприклад, параметри `(4, 'A', 'B', 'C')` призведуть до вкладеного масиву ходів `[['A', 'C'], ['B', 'A']]`, що вказує на те, що 1-м ходом було переміщення об’єкта з купи `A` до `C`, а 2-м ходом було переміщення об’єкт з купи `B` до `A`.
+Наприклад, результатом параметрів `(4, 'A', 'B', 'C')` буде вкладений масив кроків `[['A', 'C'], ['B', 'A']]`, де першим кроком було перемістити об’єкт з набору `A` до `C`, а другим кроком було перемістити об’єкт з набору `B` до `A`.
 
 # --instructions--
 
-Напишіть функцію, яка повертає ходи для укладання об’єктів у вкладений масив.
+Напишіть функцію, яка повертає ходи, щоб укласти об’єкти у вкладеному масиві.
 
 # --hints--
 
@@ -36,13 +36,13 @@ assert(res3.length === 7);
 assert.deepEqual(towerOfHanoi(3, 'A', 'B', 'C'), res3Moves);
 ```
 
-`towerOfHanoi(5, "X", "Y", "Z")` 10-й хід має бути Y -> X.
+Десятим ходом `towerOfHanoi(5, "X", "Y", "Z")` має бути Y -> X.
 
 ```js
 assert.deepEqual(res5[9], ['Y', 'X']);
 ```
 
-`towerOfHanoi(7, 'A', 'B', 'C')` перші десять ходів мають бути `[['A','B'], ['A','C'], ['B','C'], ['A','B'], ['C','A'], ['C','B'], ['A','B'], ['A','C'], ['B','C'], ['B','A']]`
+Першими десятьма ходами `towerOfHanoi(7, 'A', 'B', 'C')` мають бути `[['A','B'], ['A','C'], ['B','C'], ['A','B'], ['C','A'], ['C','B'], ['A','B'], ['A','C'], ['B','C'], ['B','A']]`
 
 ```js
 assert.deepEqual(towerOfHanoi(7, 'A', 'B', 'C').slice(0, 10), res7First10Moves);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/vector-cross-product.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/vector-cross-product.md
index 24fdd749d9b..df6a0b6809b 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/vector-cross-product.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/vector-cross-product.md
@@ -1,6 +1,6 @@
 ---
 id: 594810f028c0303b75339ad2
-title: Перехресний добуток векторів
+title: Навхресний векторний добуток
 challengeType: 1
 forumTopicId: 302342
 dashedName: vector-cross-product
@@ -8,11 +8,11 @@ dashedName: vector-cross-product
 
 # --description--
 
-A vector is defined as having three dimensions as being represented by an ordered collection of three numbers: (X, Y, Z).
+Вектор визначається наявністю трьох вимірів, представлених впорядкованою множиною трьох чисел: (X, Y, Z).
 
 # --instructions--
 
-Напишіть функцію, яка приймає два вектори (масиви) як вхідні дані та обчислює їхній перехресний добуток. Ваша функція має повертати `null` при недопустимих вхідних даних, таких як вектори різної довжини.
+Напишіть функцію, яка приймає два вектори (масиви) як ввід та обчислює їх векторний добуток. Функція має повернути `null`, якщо ввід недійсний (наприклад, надано вектори різної довжини).
 
 # --hints--
 
@@ -22,7 +22,7 @@ A vector is defined as having three dimensions as being represented by an ordere
 assert.equal(typeof crossProduct, 'function');
 ```
 
-`crossProduct()` має повернути null.
+`crossProduct()` має повернути `null`.
 
 ```js
 assert.equal(crossProduct(), null);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/vector-dot-product.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/vector-dot-product.md
index 38a71768ba2..d8b100b8d5a 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/vector-dot-product.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/vector-dot-product.md
@@ -1,6 +1,6 @@
 ---
 id: 594810f028c0303b75339ad3
-title: Скалярний добуток векторів
+title: Скалярний векторний добуток
 challengeType: 1
 forumTopicId: 302343
 dashedName: vector-dot-product
@@ -8,11 +8,11 @@ dashedName: vector-dot-product
 
 # --description--
 
-A vector can have one or more values represented by an ordered collection. Examples could be (x), (x, y), or (x, y, z).
+Вектор може мати одне або декілька значень, представлених як впорядкована множина. Наприклад, (x), (x, y) або (x, y, z).
 
 # --instructions--
 
-Напишіть функцію, що приймає два вектори (представлені як одновимірні масиви) як вхідні дані та обчислює їхній скалярний добуток. Ваша функція має повернути `null` при недопустимих вхідних даних (наприклад, вектори різної довжини), або коли замість двох векторів приходять інші дані.
+Напишіть функцію, яка приймає два вектори (представлені як одновимірні масиви) як ввід та обчислює їх скалярний добуток. Функція має повернути `null`, якщо ввід недійсний (наприклад, надано вектори різної довжини або передано інші дані, а не вектори).
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/word-frequency.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/word-frequency.md
index 9b0301ee446..efc6e31864a 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/word-frequency.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/word-frequency.md
@@ -8,21 +8,21 @@ dashedName: word-frequency
 
 # --description--
 
-Given a text string and an integer n, return the n most common words in the file (and the number of their occurrences) in decreasing frequency.
+Дано текстовий рядок та ціле число n. Поверніть n слів, які найчастіше зустрічаються у файлі (та кількість повторень) в порядку спадання.
 
 # --instructions--
 
-Напишіть функцію, яка рахує повторення кожного слова та поверніть n найпоширеніших слів разом із кількістю їх повторень у порядку зменшенням частоти.
+Напишіть функцію, щоб порахувати кількість повторень кожного слова та повернути n найповторюваніших слів разом із кількістю їх повторень в порядку спадання.
 
-Функція має повертати 2D масив, кожний з елементів якого має мати наступний вигляд: `[word, freq]`. `word` має бути словом, яке починається з маленької літери, а `freq` — числом, що позначає кількість.
+Функція має повернути 2D-масив, де кожен елемент має такий вигляд: `[слово, кількість повторень]`. `слово` має бути словом в нижньому регістрі, а `кількість повторень` має бути числом.
 
-Функція має повернути пустий масив, якщо рядок не надано.
+Функція має повернути порожній масив, якщо рядок не надано.
 
-Функція повинна бути нечутливою до регістру, наприклад, між рядками "Hello" та "hello" немає бути різниці.
+Функція має бути нечутливою до регістру. Наприклад, між рядками "Hello" та "hello" немає різниці.
 
-Немає різниці між словами, що містять спеціальні символи — підкреслювання, тире, апострофи, коми тощо.
+Слова, які містять спеціальні символи (підкреслення, тире, апострофи, коми), потрібно вважати різними.
 
-Наприклад, враховуючи рядок "Hello hello goodbye", ваша функція має повернути `[['hello', 2], ['goodbye', 1]]`.
+Наприклад, якщо дано рядок "Hello hello goodbye", то функція має повернути `[['hello', 2], ['goodbye', 1]]`.
 
 # --hints--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/word-wrap.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/word-wrap.md
index a432c16f1bf..f1ab184d530 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/word-wrap.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/word-wrap.md
@@ -8,11 +8,11 @@ dashedName: word-wrap
 
 # --description--
 
-Even today, with proportional fonts and complex layouts, there are still cases where you need to wrap text at a specified column. The basic task is to wrap a paragraph of text in a simple way.
+Навіть сьогодні, коли існують пропорційні шрифти та складні макети, зустрічаються випадки, що потрібно розмістити текст у вказаному стовпчику. Основне завдання — розмістити певний абзац тексту в межах стовпчика простим способом.
 
 # --instructions--
 
-Напишіть функцію, яка може перенести даний текст на будь-яку кількість символів. Як приклад, перенесений текст із 80 символів, має виглядати наступним чином:
+Напишіть функцію, яка може перенести даний текст з будь-якою кількістю символів. Наприклад, ось текст, рядок якого містить до 80 символів:
 
 <pre>
 Wrap text using a more sophisticated algorithm such as the Knuth and Plass TeX
@@ -23,37 +23,37 @@ than a simple minimum length algorithm.
 
 # --hints--
 
-wrap має бути функцією.
+`wrap` має бути функцією.
 
 ```js
 assert.equal(typeof wrap, 'function');
 ```
 
-перенесення має повернути рядок.
+`wrap` має повернути рядок.
 
 ```js
 assert.equal(typeof wrap('abc', 10), 'string');
 ```
 
-wrap(80) має повернути 4 рядки.
+`wrap(80)` має повернути 4 рядки.
 
 ```js
 assert(wrapped80.split('\n').length === 4);
 ```
 
-Ваша функція `wrap` має повернути наш очікуваний текст.
+Функція `wrap` має повернути очікуваний текст.
 
 ```js
 assert.equal(wrapped80.split('\n')[0], firstRow80);
 ```
 
-wrap(42) має повернути 7 рядків.
+`wrap(42)` має повернути 7 рядків.
 
 ```js
 assert(wrapped42.split('\n').length === 7);
 ```
 
-Ваша функція `wrap` має повернути наш очікуваний текст.
+Функція `wrap` має повернути очікуваний текст.
 
 ```js
 assert.equal(wrapped42.split('\n')[0], firstRow42);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/y-combinator.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/y-combinator.md
index 6e3daef7849..127607655f3 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/y-combinator.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/y-combinator.md
@@ -1,6 +1,6 @@
 ---
 id: 594810f028c0303b75339ad5
-title: Y комбінатор
+title: Y-комбінатор
 challengeType: 1
 forumTopicId: 302345
 dashedName: y-combinator
@@ -8,47 +8,47 @@ dashedName: y-combinator
 
 # --description--
 
-In strict <a href="https://www.freecodecamp.org/news/the-principles-of-functional-programming/" target="_blank" rel="noopener noreferrer nofollow">functional programming</a> and the lambda calculus, functions (lambda expressions) don't have state and are only allowed to refer to arguments of enclosing functions. This rules out the usual definition of a recursive function wherein a function is associated with the state of a variable and this variable's state is used in the body of the function.
+У строгому <a href="https://www.freecodecamp.org/news/the-principles-of-functional-programming/" target="_blank" rel="noopener noreferrer nofollow">функційному програмуванні</a> та лямбда-численні, функції (лямбда-вирази) не мають стану та можуть посилатися лише на аргументи охоплюваних функцій. Це виключає звичайне визначення рекурсивної функції, де функція пов’язана зі станом змінної, і стан цієї змінної використовується в тілі функції.
 
-Комбінатор Y сам по собі є функцією без стану, яка при застосуванні до іншої такої функції повертає рекурсивну версію функції. Y комбінатор є найпростішим із класу таких функцій, які називаються комбінаторами з фіксованою точкою.
+Y-комбінатор сам по собі є функцією без стану, яка при застосуванні до іншої такої функції повертає рекурсивну версію функції. Y-комбінатор є найпростішим представником класу таких функцій, які називають комбінаторами фіксованої точки.
 
 # --instructions--
 
-Визначте функцію Y-комбінатора без збереження стану та використайте її для обчислення факторіалів. Функція `factorial(N)` вже дана.
+Визначте Y-комбінатор без стану та використайте його для обчислення факторіалів. Функцію `factorial(N)` вже надано.
 
 # --hints--
 
-Y повинен повернути функцію.
+`Y` має повернути функцію.
 
 ```js
 assert.equal(typeof Y((f) => (n) => n), 'function');
 ```
 
-factorial(1) повинен повернути 1.
+`factorial(1)` має повернути 1.
 
 ```js
 assert.equal(factorial(1), 1);
 ```
 
-factorial(2) повинен повернути 2.
+`factorial(2)` має повернути 2.
 
 ```js
 assert.equal(factorial(2), 2);
 ```
 
-factorial(3) повинен повернути 6.
+`factorial(3)` має повернути 6.
 
 ```js
 assert.equal(factorial(3), 6);
 ```
 
-factorial(4) повинен повернути 24.
+`factorial(4)` має повернути 24.
 
 ```js
 assert.equal(factorial(4), 24);
 ```
 
-factorial(10) повинен повернути 3628800.
+`factorial(10)` має повернути 3628800.
 
 ```js
 assert.equal(factorial(10), 3628800);
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/zeckendorf-number-representation.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/zeckendorf-number-representation.md
index fda9848028a..6060fc4e727 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/zeckendorf-number-representation.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/zeckendorf-number-representation.md
@@ -1,6 +1,6 @@
 ---
 id: 594810f028c0303b75339ad6
-title: Подання Цекендорфа
+title: Представлення чисел Цекендорфа
 challengeType: 1
 forumTopicId: 302346
 dashedName: zeckendorf-number-representation
@@ -8,9 +8,9 @@ dashedName: zeckendorf-number-representation
 
 # --description--
 
-Just as numbers can be represented in a positional notation as sums of multiples of the powers of ten (decimal) or two (binary); all the positive integers can be represented as the sum of one or zero times the distinct members of the Fibonacci series. Recall that the first six distinct Fibonacci numbers are: `1, 2, 3, 5, 8, 13`.
+Так само як числа можна представити в позиційній системі числення як суми добутків степенів десяти (десяткова) або двох (двійкова), всі натуральні числа можна представити як суму результатів множення унікальних членів послідовності Фібоначчі на один або нуль. Пригадайте перші шість чисел Фібоначчі: `1, 2, 3, 5, 8, 13`.
 
-Десяткове число 11 можна записати як `0*13 + 1*8 + 0*5 + 1*3 + 0*2 + 0*1` або `010100` у позиційній нотації, де стовпці представляють множення на певний елемент послідовності. Початкові нулі упущено, тому десяткові числа стають `10100`. 10100 не єдиний спосіб утворити 11 з чисел Фібоначчі, однак`0*13 + 1*8 + 0*5 + 0*3 + 1*2 + 1*1` або 010011 також утворює число 11. Для справжнього числа Цекендорфа існує додаткова умова, при якій *не можна використовувати два послідовних числа Фібоначчі*, що призводить до попереднього унікального рішення.
+Десяткове число 11 можна записати як `0*13 + 1*8 + 0*5 + 1*3 + 0*2 + 0*1` або `010100` в позиційній системі числення, де стовпці представляють множення на певний член послідовності. Початкові нулі опущено, тому десяткове число 11 стає `10100`. 10100 — не єдиний спосіб утворити 11 з чисел Фібоначчі: `0*13 + 1*8 + 0*5 + 0*3 + 1*2 + 1*1` або 010011 також представляють число 11. Для справжнього числа Цекендорфа існує додаткова умова: *не можна використовувати два послідовні числа Фібоначчі*, що призводить до попереднього унікального розв’язку.
 
 # --instructions--
 
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/zhang-suen-thinning-algorithm.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/zhang-suen-thinning-algorithm.md
index 8f3e725913e..9e43baa6cf5 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/zhang-suen-thinning-algorithm.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/zhang-suen-thinning-algorithm.md
@@ -8,7 +8,7 @@ dashedName: zhang-suen-thinning-algorithm
 
 # --description--
 
-This is an algorithm used to thin a black and white i.e. one bit per pixel images. For example, with an input image of:
+Цей алгоритм використовують, щоб прорідити чорно-білі зображення, тобто один біт на піксель зображення. Наприклад, із вхідного зображення:
 
 ```js
 const testImage1 = [
@@ -42,18 +42,18 @@ const testImage1 = [
 
 ## Алгоритм
 
-Припустимо, що чорні пікселі дорівнюють одиниці, а білі — нулю, а вхідне зображення — прямокутним масивом одиниць і нулів N на M. Алгоритм працює на всіх чорних пікселях P1, які мають вісім сусідніх пікселів. Сусідні пікселі впорядковані наступним чином:
+Припустимо, що чорні пікселі — це одиниці, білі пікселі — нулі, а вхідне зображення є прямокутним масивом N × M з одиницями та нулями. Алгоритм працює на всіх чорних пікселях P1, які мають вісім сусідніх пікселів. Сусідні пікселі впорядковані наступним чином:
 
 $$\begin{array}{|c|c|c|} \\hline P9 & P2              & P3\\\\ \\hline P8 & \boldsymbol{P1} & P4\\\\ \\hline P7 & P6              & P5\\\\ \\hline \end{array}$$
 
-Звичайно, що граничні пікселі зображення не можуть мати всі вісім сусідніх пікселів.
+Очевидно, що пікселі на краях зображення не можуть мати вісім сусідніх пікселів.
 
 - Визначимо $A(P1)$ як кількість переходів від білого до чорного ($0 \to 1$) в послідовності P2, P3, P4, P5, P6, P7, P8, P9, P2. (Зверніть увагу на P2 вкінці: це циклічна послідовність).
 - Визначимо $B(P1)$ як кількість чорних сусідніх пікселів P1. ($= \\sum(P2 \ldots P9)$)
 
 **Крок 1:**
 
-На цьому етапі визначаємо пікселі, що задовольняють всі наведені нижче умови (одночасно).
+На цьому етапі всі пікселі тестуються, а пікселі, які задовольняють наступні умови (одночасно), просто записуються.
 
 1. Піксель чорний і має вісім сусідніх пікселів
 2. $2 \le B(P1) \le 6$
@@ -61,11 +61,11 @@ $$\begin{array}{|c|c|c|} \\hline P9 & P2              & P3\\\\ \\hline P8 & \bol
 4. Принаймні один з $P2$, $P4$ та $P6$ є білим
 5. Принаймні один з $P4$, $P6$ та $P8$ є білим
 
-Після ітерації зображення та збору всіх пікселів, що задовольняють усі умови 1 кроку, усі ці пікселі замінюються на білі.
+Після ітерації зображення і збору всіх пікселів, які задовольняють умови першого кроку, всі ці пікселі (які задовольняють умови) стають білими.
 
-**Step 2:**
+**Крок 2:**
 
-Усі пікселі знову перевіряємо і на цьому етапі визначаємо пікселі, що задовольняють всі наведені нижче умови.
+На цьому етапі всі пікселі знову тестуються, а пікселі, які задовольняють наступні умови, просто записуються.
 
 1. Піксель чорний і має вісім сусідніх пікселів
 2. $2 \le B(P1) \le 6$
@@ -73,15 +73,15 @@ $$\begin{array}{|c|c|c|} \\hline P9 & P2              & P3\\\\ \\hline P8 & \bol
 4. Принаймні один з $P2$, $P4$ та $P8$ є білим
 5. Принаймні один з $P2$, $P6$ та $P8$ є білим
 
-Після ітерації зображення та збору всіх пікселів, що задовольняють усі умови 2 кроку, усі ці пікселі знову замінюються на білі.
+Після ітерації зображення і збору всіх пікселів, які задовольняють умови другого кроку, всі ці пікселі (які задовольняють умови) знову стають білими.
 
 **Ітерація:**
 
-Якщо на етапі кроку 1 або кроку 2 були встановлені будь-які пікселі, усі кроки повторюються, поки усі пікселі зображення перестануть змінюватися таким чином.
+Якщо на цьому етапі (в першому або другому кроці) були змінені будь-які пікселі, то всі кроки повторюються, доки перестануть відбуватись зміни.
 
 # --instructions--
 
-Напишіть процедуру, щоб виконати проріджування Чжан-Суна на наданому `image`, масиві рядків, де кожен рядок представляє один рядок зображення. У рядку `#` позначає чорний піксель, а пробіл — білий піксель. Функція повинна повернути проріджене зображення, використовуючи те саме вираження.
+Напишіть процедуру, щоб виконати проріджування Чжан-Суна на наданому `image` — масиві рядків, де кожен рядок представляє окремий рядок зображення. `#` в рядку позначає чорний піксель, а пробіл — білий піксель. Функція має повернути проріджене зображення, використовуючи те саме представлення.
 
 # --hints--
 
@@ -91,7 +91,7 @@ $$\begin{array}{|c|c|c|} \\hline P9 & P2              & P3\\\\ \\hline P8 & \bol
 assert.equal(typeof thinImage, 'function');
 ```
 
-`thinImage` повинно бути масивом.
+`thinImage` має повернути масив.
 
 ```js
 assert(Array.isArray(thinImage(_testImage1)));
diff --git a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/zig-zag-matrix.md b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/zig-zag-matrix.md
index f94637aeb36..dc05ffb0785 100644
--- a/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/zig-zag-matrix.md
+++ b/curriculum/challenges/ukrainian/22-rosetta-code/rosetta-code-challenges/zig-zag-matrix.md
@@ -8,9 +8,9 @@ dashedName: zig-zag-matrix
 
 # --description--
 
-A 'zig-zag' array is a square arrangement of the first $N^2$ integers, where the numbers increase sequentially as you zig-zag along the array's anti-diagonals.
+Зигзагоподібний масив — це квадратне розташування перших $N^2$ цілих чисел, де числа послідовно збільшуються по діагоналях.
 
-Наприклад, для введення `5` такий результат має згенеруватися:
+Наприклад, якщо ввести `5`, то результатом буде:
 
 <pre>
  0  1  5  6 14
@@ -26,37 +26,37 @@ A 'zig-zag' array is a square arrangement of the first $N^2$ integers, where the
 
 # --hints--
 
-ZigZagMatrix має бути функцією.
+`ZigZagMatrix` має бути функцією.
 
 ```js
 assert.equal(typeof ZigZagMatrix, 'function');
 ```
 
-Зигзагоподібна матриця повинна повернути масив.
+`ZigZagMatrix` має повернути масив.
 
 ```js
 assert.equal(typeof ZigZagMatrix(1), 'object');
 ```
 
-Зигзагоподібна матриця повинна повернути масив вкладених масивів.
+`ZigZagMatrix` має повернути масив вкладених масивів.
 
 ```js
 assert.equal(typeof ZigZagMatrix(1)[0], 'object');
 ```
 
-Зигзагоподібна матриця повинна повернути \[[0]].
+`ZigZagMatrix(1)` має повернути `\[[0]]`.
 
 ```js
 assert.deepEqual(ZigZagMatrix(1), zm1);
 ```
 
-Зигзагоподібна матриця(2) повинна повернути \[[0, 1], [2, 3]].
+`ZigZagMatrix(2)` має повернути `\[[0, 1], [2, 3]]`.
 
 ```js
 assert.deepEqual(ZigZagMatrix(2), zm2);
 ```
 
-Зигзагоподібна матриця(5) повинна повернути задану матрицю.
+`ZigZagMatrix(5)` має повернути вказану матрицю.
 
 ```js
 assert.deepEqual(ZigZagMatrix(5), zm5);
diff --git a/curriculum/dictionaries/korean/comments.json b/curriculum/dictionaries/korean/comments.json
new file mode 100644
index 00000000000..7ec45882abb
--- /dev/null
+++ b/curriculum/dictionaries/korean/comments.json
@@ -0,0 +1,113 @@
+{
+  "hyek8f": "섭씨 24.44도",
+  "rscjup": "섭씨 26도",
+  "am2xch": "수행할 작업을 나타내는 문자열 목록:",
+  "6rztdg": "여기에 레코드 추가",
+  "to1vwe": "여기에 handleChange() 메소드와 submitMessage 메소드를 추가하세요",
+  "31b7ey": "이 줄 위에 코드를 추가합니다",
+  "c24by8": "이 라인 아래에 코드를 추가합니다",
+  "jbrt8k": "m번째 줄을 newArray(새 배열)에 추가하십시오",
+  "zkh12d": "After passing the challenge experiment with myString and see how the grouping works",
+  "mobihi": "Assign 5 to oopsGlobal here",
+  "v3ups9": "Call scale with an argument here",
+  "iw4a3a": "사례 1: 대상에 자식이 없습니다",
+  "463xp8": "사례 2: 대상에 자식이 하나 있습니다",
+  "u3inrm": "사례 3: 대상에 자식이 둘 있습니다",
+  "axnbgg": "이 라인 위에서 코드 변경",
+  "i2kck7": "이 라인 아래에서 코드 변경",
+  "dlbobn": "이 라인을 변경하세요",
+  "v127zb": "Check the two consoles to see the difference. The freeCodeCamp console should have printed the variable twice, once for each test of this challenge. The browser console should only print the variable once because you cleared it first.",
+  "ejm0ql": "Close third tab in video window, and join",
+  "iwch6t": "Complete the method below and implement the others similarly",
+  "hihhyz": "Complete the return statement:",
+  "sdxti5": "Count the children of the target to delete",
+  "wfw6sc": "Create an x and y scale",
+  "sjw6f4": "Create the scale here",
+  "nupsh2": "Creates a 2-D array with m rows and n columns of zeroes",
+  "xfjb3s": "Declare the myGlobal variable below this line",
+  "htpjk7": "Define a constant for decrement action types",
+  "tfzdsp": "Define a constant for increment action types",
+  "zh20mi": "Define ADD, addMessage(), messageReducer(), and store here:",
+  "43qs4c": "Define an action creator for decrementing",
+  "nen3qo": "Define an action creator for incrementing",
+  "0cwyam": "Define an action creator here:",
+  "fq0wsg": "Define an action here:",
+  "tegkqa": "Define the Container component here:",
+  "b5oihn": "Define the counter reducer which will increment or decrement the state based on the action it receives",
+  "91y4pd": "Define the Redux store here, passing in your reducers",
+  "eie1vk": "Define the root reducer here",
+  "5s7nnl": "Define the store here:",
+  "34qe2q": "Dictionary will hold the items of our set",
+  "2c1wra": "Dispatch received data action here",
+  "923cpg": "Dispatch request action here",
+  "picsyf": "Dispatch the action here:",
+  "ysjr1s": "Display code",
+  "kjd1am": "Don't mutate state here or the tests will fail",
+  "5tx4ow": "Entertainment sites",
+  "9yu58b": "Example inventory lists",
+  "ciddtb": "Find the target value and its parent",
+  "ixx548": "Fix the code below so that it evaluates to true",
+  "6mbhjj": "For example: Redux.createStore()",
+  "jshtzq": "Function that returns a string representing a cup of black tea",
+  "cw1ghf": "Function that returns a string representing a cup of green tea",
+  "iuccln": "Generate a randomly filled array",
+  "bm2mop": "Get the tabs after the tab",
+  "kchz5k": "Get the tabs before the tab",
+  "bfd23c": "Given a function (representing the tea type) and number of cups needed, the\nfollowing function returns an array of strings (each representing a cup of\na specific type of tea).",
+  "ead98i": "Global count variable:",
+  "7zf0i2": "Join them together",
+  "5j2l88": "Let's create three browser windows",
+  "e843r9": "Let's open a new tab for now",
+  "5fvehh": "myVar is not defined outside of myLocalScope",
+  "qn720a": "Now, add console.clear() before your console.log() to clear the browser console, and pass the tests.",
+  "j86mef": "Now perform the tab opening, closing, and other operations",
+  "mk7rvy": "Now remove the console log line to pass the test",
+  "n7vm1s": "Only change code above this line",
+  "cvh4x7": "Only change code below this line",
+  "lvmnm7": "Open a new tab for cat memes",
+  "avpx79": "Open your browser console.",
+  "0b5ps6": "Padding between the SVG boundary and the plot",
+  "uemoej": "Pushes n zeroes into the current row to create the columns",
+  "lm86nf": "Pushes the current row, which now has n zeroes in it, to the array",
+  "qscelx": "Redux methods are available from a Redux object",
+  "atqiig": "Render an input, button, and ul below this line",
+  "yq81wg": "Render the Provider below this line",
+  "kxio9j": "responseFromServer is set to false to represent an unsuccessful response from a server",
+  "alh6pw": "responseFromServer is set to true to represent a successful response from a server",
+  "1cfidd": "responseFromServer represents a response from a server",
+  "96tntk": "Returns 30",
+  "58a5g7": "Run and check the console",
+  "71bus9": "Run the tests to see the difference between the two consoles.",
+  "7wp46n": "Setting in Fahrenheit scale",
+  "oefvg5": "Setup",
+  "mnt4d3": "Should display 'carrot'",
+  "fhe9m4": "Social sites",
+  "za434b": "Stacked bar chart of weekly training",
+  "7c1fv9": "Stacked bar chart will go here",
+  "r44ovx": "tabs is an array of titles of each site open within the window",
+  "cl8peb": "test array:",
+  "1xi3cv": "The global variable",
+  "3gc01a": "The main.scss file",
+  "14kfog": "This is our intersection method",
+  "d1shtt": "This is our union method",
+  "pqq6sy": "This method will add an element to the set",
+  "nd2oxy": "This method will check for the presence of an element and return true or false",
+  "ocm81t": "This method will remove an element from a set",
+  "or9p5p": "This method will return all the values in the set",
+  "g1608f": "This method will return the size of the set",
+  "bheu99": "This will hold the set",
+  "x1djjr": "Use console.clear() on the next line to clear the browser console.",
+  "22ta95": "Use console.log() to print the output variable.",
+  "owgrP6": "Use the classes ABOVE this line",
+  "oszrtn": "Use the classes BELOW this line",
+  "w43c7l": "Using s = [2, 5, 7] would be invalid",
+  "pgckoj": "Variable assignments",
+  "2xiqvv": "Variable declarations",
+  "2sx8zg": "We keep a record of the array inside the object",
+  "xmjfd8": "When you close a tab",
+  "es69h6": "When you join two windows into one window",
+  "fho5t5": "When you open a new tab at the end",
+  "00kcrm": "yields true",
+  "sxpg2a": "당신의 사서함, 드라이브 및 기타 작업 사이트",
+  "4143lf": "initialize buttons"
+}